WO2006006795A1 - Apparatus for maintaining constant temperature in water quality measuring instruments - Google Patents

Apparatus for maintaining constant temperature in water quality measuring instruments Download PDF

Info

Publication number
WO2006006795A1
WO2006006795A1 PCT/KR2005/002190 KR2005002190W WO2006006795A1 WO 2006006795 A1 WO2006006795 A1 WO 2006006795A1 KR 2005002190 W KR2005002190 W KR 2005002190W WO 2006006795 A1 WO2006006795 A1 WO 2006006795A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
temperature
thermoelectric element
sensor
heat
Prior art date
Application number
PCT/KR2005/002190
Other languages
French (fr)
Inventor
Gil-Ju Jin
Won-Hui Cho
Hyung-Joo Kim
Ji-Goo Jang
Original Assignee
Korbi Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korbi Co., Ltd. filed Critical Korbi Co., Ltd.
Publication of WO2006006795A1 publication Critical patent/WO2006006795A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water

Definitions

  • the present invention relates to an apparatus for maintaining constant temperature in water quality measuring instruments, which provides water at a constant temperature to be analyzed to a heat- sensitive sensor of the water quality analyzer that responds to microorganisms and chemicals.
  • a water analysis sensor provided in a water quality analyzer, is greatly affected by temperature.
  • the water quality analyzer employs a sensor that responds to microorganisms and chemicals as the water analysis sensor does, it shows a large deviation in its results depending on the temperature. This makes difficult to obtain accurate results when the water analysis sensor is heavily affected by temperature variation, resulting in deterioration in the re ⁇ liability of analyzed results.
  • a pH meter enables correction of the pH value depending on the outside temperature because corrective data relative to the temperature is applied to the pH meter.
  • most water quality analyzers are able to perform analysis only at a predetermined constant temperature. For this reason, keeping the water quality analyzer at a constant temperature is very important for accurate analysis.
  • a generally known optimal temperature of the water quality analyzer, using the sensor that responds to microorganisms and chemicals, is higher than room temperature, for example, 25 degrees Celsius.
  • Examples of conventional methods to keep a water analysis sensor at a constant temperature more than a room temperature include a thermal convection method to regulate a temperature of the sensor using heat conduction of a heater mounted in the water quality analyzer, and a thermal conduction method to regulate the temperature of the sensor using heat directly conducted from the heater.
  • the thermal convection method has a problem in that it is difficult to maintain a desired temperature due to excessive heat loss so long as the entire water quality analyzer is completely heat insulated. Also, the thermal conduction method has a problem in that analyzed results of the sensor are affected by heat directly conducted thereto.
  • Another problem of the conventional methods is that it is very difficult to con ⁇ tinuously control the temperature of the water to be analyzed at a constant temperature only using a heater or cooler.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus for maintaining constant temperature in water quality measuring instruments, which can continuously maintains the temperature of a sensor provided in the water quality analyzer at a constant temperature without using a heater or cooler, and which can achieve simplified temperature control.
  • an apparatus for maintaining constant temperature in water quality measuring instruments comprising: a case containing a water analysis sensor and a water channel connected to the water analysis sensor therein, an interior space of the case being filled with a heat insulating material to enclose the water analysis sensor and the water channel; a temperature sensor mounted on a side of the water channel; a thermoelectric element to selectively induce en- dothermic and exothermic reactions depending on the signal from the temperature sensor to thereby perform heat exchange with water to be analyzed that circulates within the water channel; and a cooling fan mounted underneath the case to discharge heat generated from the thermoelectric element to the outside.
  • the apparatus may further comprise a protective case wrapped around the water analysis sensor to protect the sensor from external shocks.
  • the apparatus may further comprise a conductor mounted close to the thermoelectric element to transmit heat energy generated from the thermoelectric element to another adjacent member.
  • the water channel may have a tortuous heat-exchange section to increase a heat exchange area, and the temperature sensor and the thermoelectric element may be arranged around the heat-exchange section.
  • the apparatus may further comprise a radiating fin provided between the thermoelectric element and the cooling fan to absorb heat energy generated from the thermoelectric element.
  • the apparatus may further comprise a temperature controller to control operation of the thermoelectric element and the cooling fan using the signal from the temperature sensor.
  • the present invention has the following advantageous effects.
  • an apparatus for maintaining constant temperature in water quality measuring instruments, of the present invention can automatically control the temperature variation of water by means of a thermoelectric element when the water passes through the interior space of the case of the apparatus.
  • the apparatus to maintain a constant water temperature can achieve heat insulation of a water analysis sensor of the water quality analyzer, resulting in improved reliability in terms of the water analysis sensor.
  • the present invention can eliminate the use of a heater or cooler, enabling a reduction in the overall size and manufacturing costs of the water quality analyzer.
  • the present invention can minimize deviation in the results of the water quality analyzer due to the exterior temperature variation, and can freely set a reference temperature of the water analysis sensor.
  • Fig. 1 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an embodiment of the present invention
  • Fig. 2 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an alternative embodiment of the present invention.
  • FIG. 1 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an embodiment of the present invention.
  • an apparatus for maintaining constant temperature in water quality measuring instruments comprises a case 10 in which a water analysis sensor 20 and a water channel 30 to supply water to be analyzed into the water analysis sensor 20 are mounted.
  • An interior space of the case 10 is also filled with a heat insulating material 11 to prevent the water to be analyzed from being exchanged with outside air while passing through the interior space of the case 10.
  • the water analysis sensor 20 is sensitive to external shock.
  • a protective case 20 is wrapped around the water analysis sensor 20.
  • Both ends of the water channel 30 are penetrated through the case 10 so that the water to be analyzed is introduced into the case 10 via one end of the water channel 30 and then is discharged from the case 10 via the other end of the water channel 30 after passing through the water analysis sensor 20.
  • the water channel 30 has a tortuous heat-exchange section 31 to increase the heat exchange area.
  • a temperature sensor 40 Around the heat-exchange section 31 of the water channel 30 are provided a temperature sensor 40 and a thermoelectric element 50.
  • the temperature sensor 40 is positioned close to the water channel 30 at the heat exchange section 31 thereof.
  • the temperature sensor 40 is also electrically connected to a temperature controller 90 to measure a temperature of the water to be analyzed that circulates inside the water channel 30.
  • the thermoelectric element 50 is operable based on a conversion phenomenon of heat to electricity.
  • the thermoelectric element 50 selectively induces endothermic and exothermic reactions via pole conversion of direct current power. That is, when the temperature of the water to be introduced into the water analysis sensor 20 is lower than a preset temperature, the thermoelectric element 50 is heated at a surface thereof that comes into contact with the water channel 30, while the other surface of the ther ⁇ moelectric element 50 opposite to the water channel 30 is cooled. Conversely, when the temperature of the water to be introduced into the water analysis sensor 20 is higher than the preset temperature, the thermoelectric element 50 is cooled at the surface thereof that comes into contact with the water channel 30, while the other surface of the thermoelectric element 50 opposite to the water channel 30 is heated.
  • thermoelectric element 50 is mounted close to the water channel 30 at the heat-exchange section 31 thereof, thereby performing heat exchange with the water to be analyzed that circulates inside the water channel 30.
  • the apparatus for maintaining a constant temperature of the present invention does not require a cooler and a heater, which are conventionally mounted to regulate the temperature of the water quality analyzer.
  • a blowing fan 60 is mounted at the outside of the case 10.
  • the blowing fan 60 is controlled by means of the temperature controller 90 that operates upon receiving signals from the temperature sensor 40.
  • the temperature controller 90 has a control circuit to control the driving of both the thermoelectric element 50 and the blowing fan 60 based on signals to the temperature sensor 40 that is mounted in the heat exchanger.
  • the control circuit serves to set the temperature of the heat exchanger.
  • the temperature controller 90 having the control circuit is known in the art, and thus, a detailed de ⁇ scription thereof will be omitted.
  • a radiating fin 80 may be further mounted between the thermoelectric element 50 and the blowing fan 60 to absorb heat energy generated from the ther ⁇ moelectric element 50. Absorbing the heat energy of the thermoelectric element 50 by means of the radiating fin 80 allows the heat energy to be more rapidly discharged to the outside.
  • a conductor 70 may be mounted close to the thermoelectric element 50 to transmit the heat energy generated from the thermoelectric element 50 to another adjacent member.
  • the conductor 70 may be disposed at any one of opposite surfaces of the thermoelectric element 50.
  • the conductor 70 is also mounted to hermetically seal the case 10 to thereby prevent introduction of outside air into the case 10. This prevents a temperature of the water to be analyzed from varying while passing through the case 10.
  • Fig. 1 illustrates the conductor 70 interposed between the thermoelectric element 50 and the radiating fin 80. With this arrangement, the conductor 70 is able to rapidly transmit the heat energy generated from the thermoelectric element 50 to the radiating fin 80.
  • Fig. 2 illustrates the conductor 70 mounted on the side of the thermoelectric element 50 opposite to the radiating fin 80.
  • the thermoelectric element 50 comes into direct contact with the radiating fin 80, allowing the heat energy of the ther ⁇ moelectric element 50 to be more rapidly discharged to the outside.
  • the temperature sensor 40 senses the temperature of the water to be analyzed to send a signal to the temperature controller 90. Then, the temperature controller 90 compares the signal from the temperature sensor 40 with a reference temperature. As a result of the comparison, if the temperature of the water to be analyzed is higher than the reference temperature, the temperature controller 90 transmits an endothermic reaction signal to the thermoelectric element 50 and, simultaneously, drives the blowing fan 60.
  • thermoelectric element 50 Upon receiving the endothermic reaction signal from the temperature controller 90, the thermoelectric element 50 induces an endothermic reaction at a surface thereof which comes into contact with the water channel 30, while inducing an exothermic reaction at the other surface thereof opposite to the water channel 30. As a result, the temperature of the water to be analyzed is lowered while circulating in the water channel 30. In this case, a surface temperature of the conductor 70 is raised by the exothermic reaction of the thermoelectric element 50. The heat conducted by the conductor 70 is absorbed by the radiating fin 80 to thereby be rapidly discharged to the outside of the case 10 under operation of the blowing fan 60.
  • the temperature controller 90 stops operation of the thermoelectric element 50 and the blowing fan 60, thereby keeping the temperature of the water to be analyzed at a constant temperature.
  • the temperature controller 90 transmits an exothermic reaction signal to the thermoelectric element 50.
  • the thermoelectric element 50 induces an exothermic reaction at a surface thereof that comes into contact with the water channel 30, while inducing an endothermic reaction at the other surface thereof opposite to the water channel 30.
  • the temperature of the water to be analyzed is raised while circulating in the water channel 30.
  • the surface temperature of the conductor 70 is lowered by the endothermic reaction of the ther ⁇ moelectric element 50.
  • the cold energy conducted by the conductor 70 is absorbed by the radiating fin 80 to thereby be rapidly discharged to the outside of the case 10 under operation of the blowing fan 60.
  • the temperature of the water to be analyzed is controlled to have a constant temperature as it passes through the temperature sensor 40, resulting in improved reliability in the results of the water quality analyzer. Also, a preset temperature of the water to be analyzed can be freely regulated.
  • thermoelectric element 50 comes into direct contact with the radiating fin 80. This enables the heat energy of the thermoelectric element 50 to be more rapidly discharged to the outside of the case 10, resulting in increased heat exchange efficiency of the thermoelectric element 50 and more improved constant temperature maintenance performance.
  • the present invention provides an apparatus for maintaining constant temperature in water quality measuring instruments, which can automatically control the temperature variation of the water by means of a thermoelectric element when the water passes through a case of the apparatus. Also, the constant-temperature maintaining apparatus of the present invention can achieve heat insulation of a water analysis sensor of the water quality analyzer, resulting in improved reliability in results of the water analysis sensor.
  • the present invention can eliminate the use of a heater or cooler, enabling a reduction in the overall size and manufacturing costs of the water quality analyzer.
  • the present invention can minimize a deviation in analyzed results of the water quality analyzer due to exterior temperature variation, and can freely set a reference temperature of the water analysis sensor.

Abstract

Disclosed is an apparatus for maintaining constant temperature in water quality measuring instruments to provide a constant-temperature water to a heat-sensitive sensor that responds to microorganisms and chemicals. The apparatus comprises a case containing a water analysis sensor and a water channel connected to the sensor therein, an interior space of the case being filled with a heat insulating material to enclose the sensor and the pipe, a temperature sensor mounted on a side of the water channel, a thermoelectric element to selectively induce endothermic and exothermic reactions depending on the signal from the temperature sensor to perform heat exchange with water inside the pipe, and a cooling fan mounted underneath the case to discharge heat from the thermoelectric element to the outside. The apparatus enables accurate automatic control in temperature variation of the water, achieves high reliability of results, and reduces the overall size and manufacturing costs of the water quality analyzer.

Description

Description
APPARATUS FOR MAINTAINING CONSTANT TEMPERATURE IN WATER QUALITY MEASURING IN¬ STRUMENTS
Technical Field
[1] The present invention relates to an apparatus for maintaining constant temperature in water quality measuring instruments, which provides water at a constant temperature to be analyzed to a heat- sensitive sensor of the water quality analyzer that responds to microorganisms and chemicals. Background Art
[2] As is generally well known, a water analysis sensor, provided in a water quality analyzer, is greatly affected by temperature. Especially, when the water quality analyzer employs a sensor that responds to microorganisms and chemicals as the water analysis sensor does, it shows a large deviation in its results depending on the temperature. This makes difficult to obtain accurate results when the water analysis sensor is heavily affected by temperature variation, resulting in deterioration in the re¬ liability of analyzed results.
[3] A pH meter enables correction of the pH value depending on the outside temperature because corrective data relative to the temperature is applied to the pH meter. However, most water quality analyzers are able to perform analysis only at a predetermined constant temperature. For this reason, keeping the water quality analyzer at a constant temperature is very important for accurate analysis. A generally known optimal temperature of the water quality analyzer, using the sensor that responds to microorganisms and chemicals, is higher than room temperature, for example, 25 degrees Celsius.
[4] Examples of conventional methods to keep a water analysis sensor at a constant temperature more than a room temperature include a thermal convection method to regulate a temperature of the sensor using heat conduction of a heater mounted in the water quality analyzer, and a thermal conduction method to regulate the temperature of the sensor using heat directly conducted from the heater.
[5] However, the thermal convection method has a problem in that it is difficult to maintain a desired temperature due to excessive heat loss so long as the entire water quality analyzer is completely heat insulated. Also, the thermal conduction method has a problem in that analyzed results of the sensor are affected by heat directly conducted thereto.
[6] Moreover, to accurately keep a constant temperature, it is necessary to simul- taneously heat and cool the analyzer depending on a variation of temperature. However, since the above-described conventional methods merely enable temperature regulation by heating when a temperature of the water quality analyzer is low, they are limited in keeping the sensor at a constant temperature. To solve this problem, it has been tried to provide the water quality analyzer with both a heater and a cooler. However, it disadvantageously increases installation costs and size of the water quality analyzer.
[7] Another problem of the conventional methods is that it is very difficult to con¬ tinuously control the temperature of the water to be analyzed at a constant temperature only using a heater or cooler.
Disclosure of Invention Technical Problem
[8] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus for maintaining constant temperature in water quality measuring instruments, which can continuously maintains the temperature of a sensor provided in the water quality analyzer at a constant temperature without using a heater or cooler, and which can achieve simplified temperature control. Technical Solution
[9] In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of an apparatus for maintaining constant temperature in water quality measuring instruments comprising: a case containing a water analysis sensor and a water channel connected to the water analysis sensor therein, an interior space of the case being filled with a heat insulating material to enclose the water analysis sensor and the water channel; a temperature sensor mounted on a side of the water channel; a thermoelectric element to selectively induce en- dothermic and exothermic reactions depending on the signal from the temperature sensor to thereby perform heat exchange with water to be analyzed that circulates within the water channel; and a cooling fan mounted underneath the case to discharge heat generated from the thermoelectric element to the outside.
[10] Preferably, the apparatus may further comprise a protective case wrapped around the water analysis sensor to protect the sensor from external shocks.
[11] Preferably, the apparatus may further comprise a conductor mounted close to the thermoelectric element to transmit heat energy generated from the thermoelectric element to another adjacent member.
[12] Preferably, the water channel may have a tortuous heat-exchange section to increase a heat exchange area, and the temperature sensor and the thermoelectric element may be arranged around the heat-exchange section. [13] Preferably, the apparatus may further comprise a radiating fin provided between the thermoelectric element and the cooling fan to absorb heat energy generated from the thermoelectric element. [14] Preferably, the apparatus may further comprise a temperature controller to control operation of the thermoelectric element and the cooling fan using the signal from the temperature sensor.
Advantageous Effects
[15] The present invention has the following advantageous effects.
[16] Firstly, an apparatus for maintaining constant temperature in water quality measuring instruments, of the present invention can automatically control the temperature variation of water by means of a thermoelectric element when the water passes through the interior space of the case of the apparatus. [17] Secondly, the apparatus to maintain a constant water temperature can achieve heat insulation of a water analysis sensor of the water quality analyzer, resulting in improved reliability in terms of the water analysis sensor. [18] Thirdly, the present invention can eliminate the use of a heater or cooler, enabling a reduction in the overall size and manufacturing costs of the water quality analyzer. [19] Fourthly, by virtue of the heat insulation of the water quality analyzer, the present invention can minimize deviation in the results of the water quality analyzer due to the exterior temperature variation, and can freely set a reference temperature of the water analysis sensor.
Brief Description of the Drawings [20] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: [21] Fig. 1 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an embodiment of the present invention; and [22] Fig. 2 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an alternative embodiment of the present invention.
Best Mode for Carrying Out the Invention [23] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having o rdinary skill in the art upon examination of the following or may be learned from practice of the invention. Also, the terms used in the following description and claims are terms defined taking into consideration the functions obtained in accordance with the present invention.
[24] Now, preferred embodiments of the present invention will be explained in detail with reference to the accompanying drawings.
[25] Fig. 1 is a sectional view illustrating an apparatus for maintaining constant temperature in water quality measuring instruments according to an embodiment of the present invention.
[26] As shown in Fig. 1, an apparatus for maintaining constant temperature in water quality measuring instruments according to an embodiment of the present invention comprises a case 10 in which a water analysis sensor 20 and a water channel 30 to supply water to be analyzed into the water analysis sensor 20 are mounted. An interior space of the case 10 is also filled with a heat insulating material 11 to prevent the water to be analyzed from being exchanged with outside air while passing through the interior space of the case 10. The water analysis sensor 20 is sensitive to external shock. Thus, preferably, a protective case 20 is wrapped around the water analysis sensor 20.
[27] Both ends of the water channel 30 are penetrated through the case 10 so that the water to be analyzed is introduced into the case 10 via one end of the water channel 30 and then is discharged from the case 10 via the other end of the water channel 30 after passing through the water analysis sensor 20.
[28] The water channel 30 has a tortuous heat-exchange section 31 to increase the heat exchange area. Around the heat-exchange section 31 of the water channel 30 are provided a temperature sensor 40 and a thermoelectric element 50.
[29] The temperature sensor 40 is positioned close to the water channel 30 at the heat exchange section 31 thereof. The temperature sensor 40 is also electrically connected to a temperature controller 90 to measure a temperature of the water to be analyzed that circulates inside the water channel 30.
[30] The thermoelectric element 50 is operable based on a conversion phenomenon of heat to electricity. The thermoelectric element 50 selectively induces endothermic and exothermic reactions via pole conversion of direct current power. That is, when the temperature of the water to be introduced into the water analysis sensor 20 is lower than a preset temperature, the thermoelectric element 50 is heated at a surface thereof that comes into contact with the water channel 30, while the other surface of the ther¬ moelectric element 50 opposite to the water channel 30 is cooled. Conversely, when the temperature of the water to be introduced into the water analysis sensor 20 is higher than the preset temperature, the thermoelectric element 50 is cooled at the surface thereof that comes into contact with the water channel 30, while the other surface of the thermoelectric element 50 opposite to the water channel 30 is heated. Therefore, the thermoelectric element 50 is mounted close to the water channel 30 at the heat-exchange section 31 thereof, thereby performing heat exchange with the water to be analyzed that circulates inside the water channel 30. Through the use of the ther¬ moelectric element 50, the apparatus for maintaining a constant temperature of the present invention does not require a cooler and a heater, which are conventionally mounted to regulate the temperature of the water quality analyzer.
[31] To discharge heat energy generated from the thermoelectric element 50 to the outside, a blowing fan 60 is mounted at the outside of the case 10. The blowing fan 60 is controlled by means of the temperature controller 90 that operates upon receiving signals from the temperature sensor 40. The temperature controller 90 has a control circuit to control the driving of both the thermoelectric element 50 and the blowing fan 60 based on signals to the temperature sensor 40 that is mounted in the heat exchanger. The control circuit serves to set the temperature of the heat exchanger. The temperature controller 90 having the control circuit is known in the art, and thus, a detailed de¬ scription thereof will be omitted.
[32] Meanwhile, a radiating fin 80 may be further mounted between the thermoelectric element 50 and the blowing fan 60 to absorb heat energy generated from the ther¬ moelectric element 50. Absorbing the heat energy of the thermoelectric element 50 by means of the radiating fin 80 allows the heat energy to be more rapidly discharged to the outside.
[33] Also, a conductor 70 may be mounted close to the thermoelectric element 50 to transmit the heat energy generated from the thermoelectric element 50 to another adjacent member. The conductor 70 may be disposed at any one of opposite surfaces of the thermoelectric element 50. The conductor 70 is also mounted to hermetically seal the case 10 to thereby prevent introduction of outside air into the case 10. This prevents a temperature of the water to be analyzed from varying while passing through the case 10.
[34] Fig. 1 illustrates the conductor 70 interposed between the thermoelectric element 50 and the radiating fin 80. With this arrangement, the conductor 70 is able to rapidly transmit the heat energy generated from the thermoelectric element 50 to the radiating fin 80.
[35] Fig. 2 illustrates the conductor 70 mounted on the side of the thermoelectric element 50 opposite to the radiating fin 80. In this case, the thermoelectric element 50 comes into direct contact with the radiating fin 80, allowing the heat energy of the ther¬ moelectric element 50 to be more rapidly discharged to the outside.
[36] Now, the operation of an apparatus for maintaining constant temperature in water quality measuring instruments according to the present invention will be explained.
[37] First, as the water to be analyzed is introduced into the case 10 via the water channel 30 to thereby pass through the heat-exchange section 31, the temperature sensor 40 senses the temperature of the water to be analyzed to send a signal to the temperature controller 90. Then, the temperature controller 90 compares the signal from the temperature sensor 40 with a reference temperature. As a result of the comparison, if the temperature of the water to be analyzed is higher than the reference temperature, the temperature controller 90 transmits an endothermic reaction signal to the thermoelectric element 50 and, simultaneously, drives the blowing fan 60.
[38] Upon receiving the endothermic reaction signal from the temperature controller 90, the thermoelectric element 50 induces an endothermic reaction at a surface thereof which comes into contact with the water channel 30, while inducing an exothermic reaction at the other surface thereof opposite to the water channel 30. As a result, the temperature of the water to be analyzed is lowered while circulating in the water channel 30. In this case, a surface temperature of the conductor 70 is raised by the exothermic reaction of the thermoelectric element 50. The heat conducted by the conductor 70 is absorbed by the radiating fin 80 to thereby be rapidly discharged to the outside of the case 10 under operation of the blowing fan 60.
[39] After that, if the temperature sensor 40 senses that the temperature of the water to be analyzed coincides with the reference temperature, the temperature controller 90 stops operation of the thermoelectric element 50 and the blowing fan 60, thereby keeping the temperature of the water to be analyzed at a constant temperature.
[40] Meanwhile, if the temperature of the water to be analyzed is lower than the reference temperature, the temperature controller 90 transmits an exothermic reaction signal to the thermoelectric element 50. Thereby, the thermoelectric element 50 induces an exothermic reaction at a surface thereof that comes into contact with the water channel 30, while inducing an endothermic reaction at the other surface thereof opposite to the water channel 30. As a result, the temperature of the water to be analyzed is raised while circulating in the water channel 30. In this case, the surface temperature of the conductor 70 is lowered by the endothermic reaction of the ther¬ moelectric element 50. The cold energy conducted by the conductor 70 is absorbed by the radiating fin 80 to thereby be rapidly discharged to the outside of the case 10 under operation of the blowing fan 60.
[41] With the present invention, the temperature of the water to be analyzed is controlled to have a constant temperature as it passes through the temperature sensor 40, resulting in improved reliability in the results of the water quality analyzer. Also, a preset temperature of the water to be analyzed can be freely regulated.
[42] Meanwhile, as shown in Fig. 2, when the conductor 70 is mounted on a side of the thermoelectric element 50 opposite to the radiating fin 80, the thermoelectric element 50 comes into direct contact with the radiating fin 80. This enables the heat energy of the thermoelectric element 50 to be more rapidly discharged to the outside of the case 10, resulting in increased heat exchange efficiency of the thermoelectric element 50 and more improved constant temperature maintenance performance. Industrial Applicability
[43] As is apparent from the above description, differently from a conventional method for controlling the temperature of water to be analyzed via direct heating, the present invention provides an apparatus for maintaining constant temperature in water quality measuring instruments, which can automatically control the temperature variation of the water by means of a thermoelectric element when the water passes through a case of the apparatus. Also, the constant-temperature maintaining apparatus of the present invention can achieve heat insulation of a water analysis sensor of the water quality analyzer, resulting in improved reliability in results of the water analysis sensor.
[44] Further, the present invention can eliminate the use of a heater or cooler, enabling a reduction in the overall size and manufacturing costs of the water quality analyzer.
[45] Furthermore, by virtue of the heat insulation of the water quality analyzer, the present invention can minimize a deviation in analyzed results of the water quality analyzer due to exterior temperature variation, and can freely set a reference temperature of the water analysis sensor.
[46] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modi¬ fications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

Claims
[1] An apparatus for maintaining constant temperature in water quality measuring instruments comprising: a case containing a water analysis sensor and a water channel connected to the water analysis sensor therein, an interior space of the case being filled with a heat insulating material to enclose the water analysis sensor and the water channel; a temperature sensor mounted on a side of the water channel; a thermoelectric element to selectively induce endothermic and exothermic reactions depending on a signal from the temperature sensor to thereby perform heat exchange with water to be analyzed that circulates in the water channel; and a cooling fan mounted underneath the case to discharge heat generated from the thermoelectric element to the outside.
[2] The apparatus as set forth in claim 1, further comprising: a protective case wrapped around the water analysis sensor to protect the sensor from external shock.
[3] The apparatus as set forth in claim 1, further comprising: a conductor mounted close to the thermoelectric element to transmit heat energy generated from the thermoelectric element to another adjacent member.
[4] The apparatus as set forth in claim 1, wherein: the water channel has a tortuous heat-exchange section to increase the heat exchange area; and the temperature sensor and the thermoelectric element are arranged around the heat-exchange section.
[5] The apparatus as set forth in claim 1, further comprising: a radiating fin provided between the thermoelectric element and the cooling fan to absorb heat energy generated from the thermoelectric element.
[6] The apparatus as set forth in claim 1, further comprising: a temperature controller to control operation of the thermoelectric element and the cooling fan by using the signal from the temperature sensor.
PCT/KR2005/002190 2004-07-09 2005-07-08 Apparatus for maintaining constant temperature in water quality measuring instruments WO2006006795A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20040053393A KR100596462B1 (en) 2004-07-09 2004-07-09 Apparatus for maintaining constant temperature for quality of water measuring instrument
KR10-2004-0053393 2004-07-09

Publications (1)

Publication Number Publication Date
WO2006006795A1 true WO2006006795A1 (en) 2006-01-19

Family

ID=35784111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/002190 WO2006006795A1 (en) 2004-07-09 2005-07-08 Apparatus for maintaining constant temperature in water quality measuring instruments

Country Status (2)

Country Link
KR (1) KR100596462B1 (en)
WO (1) WO2006006795A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103424530A (en) * 2013-08-22 2013-12-04 中冶焦耐工程技术有限公司 Method for measuring oil content in high-temperature condensation water

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100784140B1 (en) * 2006-07-14 2007-12-10 한국바이오시스템(주) Aseptic providing apparatus for water quality measuring equipment
KR101033483B1 (en) * 2009-06-15 2011-05-09 한국표준과학연구원 Thermostat for blood test
KR100925713B1 (en) * 2009-07-14 2009-11-10 엘엠에스 주식회사 Optical measuring device having constant temperature protector and display optical measuring apparatus using the same
KR101158057B1 (en) * 2010-01-18 2012-06-22 한국산업기술대학교산학협력단 Temperature control apparatus
KR101824398B1 (en) * 2017-04-11 2018-03-14 한국플랜트서비스 주식회사 Method for Control Stable Operation through Examination and Compensation Real Time Field Data of Measuring Instrument in Power Plants and System thereof
CN109388161A (en) * 2018-09-03 2019-02-26 郑州贯奥仪器仪表有限公司 A kind of temperature control equipment for water quality testing meter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551422A (en) * 1992-11-09 1996-09-03 Boehringer Mannheim Gmbh Method and apparatus for analytical determination of glucose in a biological matrix
WO1999039629A1 (en) * 1998-02-04 1999-08-12 Arizona Board Of Regents, A Body Corporate Of The State Of Arizona, Acting For And On Behalf Of Arizona State University Chemical sensors having microflow systems
KR200285216Y1 (en) * 2002-05-02 2002-08-13 주식회사 삼도기술 High Stabilizing Constant Temperature Device
KR20030011170A (en) * 2001-07-28 2003-02-07 한국표준과학연구원 Thermostat apparatus of high stability with thermoelectric device
US6662030B2 (en) * 1998-05-18 2003-12-09 Abbott Laboratories Non-invasive sensor having controllable temperature feature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551422A (en) * 1992-11-09 1996-09-03 Boehringer Mannheim Gmbh Method and apparatus for analytical determination of glucose in a biological matrix
WO1999039629A1 (en) * 1998-02-04 1999-08-12 Arizona Board Of Regents, A Body Corporate Of The State Of Arizona, Acting For And On Behalf Of Arizona State University Chemical sensors having microflow systems
US6662030B2 (en) * 1998-05-18 2003-12-09 Abbott Laboratories Non-invasive sensor having controllable temperature feature
KR20030011170A (en) * 2001-07-28 2003-02-07 한국표준과학연구원 Thermostat apparatus of high stability with thermoelectric device
KR200285216Y1 (en) * 2002-05-02 2002-08-13 주식회사 삼도기술 High Stabilizing Constant Temperature Device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103424530A (en) * 2013-08-22 2013-12-04 中冶焦耐工程技术有限公司 Method for measuring oil content in high-temperature condensation water

Also Published As

Publication number Publication date
KR100596462B1 (en) 2006-07-03
KR20060004315A (en) 2006-01-12

Similar Documents

Publication Publication Date Title
WO2006006795A1 (en) Apparatus for maintaining constant temperature in water quality measuring instruments
CN201152650Y (en) Cold-hot transformation apparatus having solid multi-lattice
US20060028182A1 (en) Thermoelectric methods to control temperature of batteries
US9236639B2 (en) Thermoelectric methods to control temperature of batteries
US5410130A (en) Heating and temperature cycling
US7148450B2 (en) Portable blackbody furnace
JP3352785B2 (en) Thermometer calibration device
US11686658B2 (en) Friction and wear test device with pin-on-plate differential temperature distribution and self-adaptive adjustment
CN112578257B (en) Temperature control testing device and testing equipment
CN213210816U (en) Temperature control device for single cell pretreatment
CN106843321B (en) Temperature control system and method
JP2010112862A (en) Blackbody furnace
KR20160049514A (en) Complex Specifics Testing Apparatus for Thermoelectric Element
EP1717307A4 (en) Temperature control device
CN209388200U (en) A kind of electrothermal radiation tube temperature control equipment
CN214288289U (en) Control device for constant-temperature metal bath
CN210718574U (en) Automatic drying temperature adjusting device for glass fiber chopped strand mat
CN219656555U (en) Automatic temperature control mechanism for drying equipment
JP2008202885A (en) High-low temperature testing device
CN217058145U (en) Heat exchange integration device for refrigeration heat dissipation and reaction heating
CN213276393U (en) Temperature control device
CN220271249U (en) A refrigeration wind circulating device for chromatographic column thermostated container
CN115566531B (en) Laser transceiver with high-reliability temperature control structure and optical telescope
CN218848021U (en) Floor heat conduction efficiency detection device
CN219609495U (en) Constant temperature device of refrigeration type infrared light conduction sensor

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase