DE3937017A1 - Peltier cooling block with size-related outputs - transmits heat to volatile liq. via heat exchanger in closed circuit - Google Patents

Abstract

The Peltier cooling block generates cold corresp. to the sizes of the filter elements. The heat is transmitted to a volatile liq. via a heat exchanger in a closed circuit, and/or by a condensing liq. in another closed circuit. The closed system pref. operates on a principle of a heat tube and/or a thermosyphon. The used heat exchangers form a larger surface and consists of round or quadiatic blocks of good thermal conductivity, pref. of Cu or Al, whose smooth faces pressed against the Peltier elements, with inner side formed by sintering, casting, or deep drawing, subsequently machined. ADVANTAGE - Improved heat conductivity, without need for large temp. expansion.

Description

The Peltier cooling block is used for heat dissipation of small parts services and can be used to cool air, gases, Liquids and electronic components or son permanent solid bodies are used.

The registered cooling block is used for better warmth transport to the Peltier element and / or for the better Heat transfer from the Peltier element is preferred the ambient air. When registering is the warmth transport route not limited as with heat conduction. With the help of the partial pressures and the gravity of the evaporating and the condensing liquid can long distances have to be overcome.

It is known to use Peltier cooling elements for small lei systems for cooling liquids and gases (air) the heat transport to the Peltier Element and from the Peltier element by heat conduction done by aluminum blocks. These blocks are open a correspondingly ribbed surface on the air side.

A disadvantage is the heat conduction different distances in the transmission block. Of further must with a relatively large temperature range be driven, which affects the performance of the Peltier Elements greatly reduced.

The invention has for its object the disadvantages to remove the heat conduction with its restrictions.

The object is achieved in that condensing vapor or evaporating liquid the heat at the Peltier element with high heat transfer transfers and almost loss-free through partial printing fall in the steam, or by gravity in the rivers liquid in a closed cycle to the or transported away from the respective heat exchanger.

The respective heat exchangers can now be operated independently of of direct heat conduction and in their dimensions solutions are adapted. There are better ones Peltier cooling options.  

example

The Peltier cooling block 1 is round or square, has one or more Peltier elements 2 and can be used horizontally 3 or vertically 4 as required.

Each Peltier cooling block has two heat exchanger bodies 5, at least one of which works in conjunction with a closed circuit 9 as a heat pipe 6 or thermosiphon 7, 8 .

Each heat exchanger body has a 6 or more 7, 8 outlets for the respective closed circuit 9 , via which the steam 10 is conveyed by partial pressure drops and the liquid 11 by gravity and / or capillary force.

The transmission power of the actual Peltier elements 2 is transferred over smooth surfaces 12 to the heat exchanger body 5 , on the inner, large surface 13 of which condenses steam on the cold side 14 and evaporates liquid 15 on the warm side.

The heat exchanger side with the large surface Oberflä 13, 14, 15 consists of a cast 16 or sintered part 17, wherein the cast part, the large surface is preferably formed by cylindrical 18 or frustoconical depressions which are only a small distance 19 from each other and over the entire area are distributed.

The outer shape of the heat exchanger 20, 21, 22, 23, 24 facing away from the Peltier block depends on the respective transmission options and the heat transfer figures. With poorer transmission values as with air, larger areas, e.g. B. finned tubes 20 or plate exchangers 21, 22 required. With better transmission values of liquids, z. B. smooth tubes 23, 24 .

In a round design of the Peltier cooling block 1 , the heat exchanger bodies 5 are screwed together via external threads 25 by a poorly heat-conducting plastic sleeve 26 in such a way that the smooth surfaces 12 are pressed firmly onto the Peltier element 2 for good heat conduction. The power cable 27 of the Peltier element is then guided through a bore 28 in the plastic sleeve to the outside.

Claims (5)

1. Peltier cooling block for cold generation of powers according to the sizes of the Peltier elements, characterized in that the heat is transferred via a heat exchanger to an evaporating liquid in a closed circuit and / or by condensing liquid in another closed circuit . 2. Peltier cooling block according to claim 1, characterized records that the closed systems according to the Prin zip of the heat pipe and / or the thermosiphon ten. 3. Peltier cooling block according to claim 1, characterized records that the large-area heat exchanger from good thermally conductive round or square material blocks, which are preferably made of copper or Aluminum with a smooth outer surface against the Peltier elements are pressed and on the in side as a corresponding casting, sintering or deep drawn part with subsequent processing with large Surface and good heat conduction and corresponding Liquid drain and wake options are. 4. Peltier cooling block according to claim 1, characterized records that the basic unit from the Peltier-Ele ment with the pressed heat exchangers after application installed vertically or horizontally and depending on the heat Exchanger one or more outlets for connection has the respective closed cycle. 5. Peltier cooling block according to claim 1, characterized shows that the basic element is round and the two Heat exchangers at the ends to the Peltier element External thread and poor heat-conducting art are screwed together so that the Contact pressure of the smooth surfaces on the Peltier-Ele good contact - and therefore heat transfer - ge give is. However, the heat exchangers are against each other insulated.