DE836943C - Thermocouple, especially for electrothermal generation of cold - Google Patents

Thermocouple, especially for electrothermal generation of cold

Info

Publication number
DE836943C
DE836943C DES8462A DES0008462A DE836943C DE 836943 C DE836943 C DE 836943C DE S8462 A DES8462 A DE S8462A DE S0008462 A DES0008462 A DE S0008462A DE 836943 C DE836943 C DE 836943C
Authority
DE
Germany
Prior art keywords
thermocouple
cold
electrothermal
generation
temperature difference
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DES8462A
Other languages
German (de)
Inventor
Dr Walter Haenlein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DES8462A priority Critical patent/DE836943C/en
Application granted granted Critical
Publication of DE836943C publication Critical patent/DE836943C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/023—Mounting details thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Description

Thermoelement, insbesondere zur elektrothermischen Kälteerzeugung T?s ist bekannt, claß bei den Vorhandensein einer Temperaturdifferenz an einem Thermoelement, wenn durch .dieses ein Strom fließt, eine elektromotorische Kraft entsteht bzw. umgekehrt eine Temperaturdifferenz. Bei den niedrigen Spannungen, die bei einer Temperaturdifferenz an einem Thermoelement auftreten, ist es klar, daß zur Erzeugung einer Temperaturdifferenz ebenfalls sehr geringe elektrische Spannungen in Frage kommen, aber große Strom; stärken. Diese Tatsache weist bereits auf die Hauptsehwierigkeiten der elektrothermischen Kühlung hin. Große Stromstärken bei niedrigen Spannungen bedingen sehr kleine Kontaktwiderstände. Da ein Thermoelement aas zwei verschiedenen Metallen oder Legierungen besteht, liegt eine Schwierigkeit besonders in der Lötstelle, die die beiden Metalle oder Metallegierungen verbindet. Da sich die meisten für die elektrothermische Kühlung in Frage kommenden Metalle schlecht schweißen lassen, muß man eine Lötung benutzen, die große Kontaktwiderstände ergibt. Bei den erforderlichen hohen Stromstärken genügen bereits die Übergangswiderstände der Lötstelle, sofern sie mit einem der üblichen Lote gelötet sind, um den Wirkungsgrad einer derartigen Anordnung herabzusetzen oder überhaupt in Frage zu stellen.Thermocouple, in particular for electrothermal cold generation T? S is known to exist in the presence of a temperature difference on a thermocouple, when a current flows through it, an electromotive force arises or conversely, a temperature difference. With the low voltages that occur at a Temperature difference occur on a thermocouple, it is clear that to generate a temperature difference also very low electrical voltages in question come but great stream; strengthen. This fact already points to the main difficulties the electrothermal cooling. Large currents at low voltages require very small contact resistances. Since a thermocouple has two different Metals or alloys, there is a particular difficulty in the solder joint, which connects the two metals or metal alloys. Since most of them are for the electrothermal cooling makes the metals in question difficult to weld, you have to use a soldering that gives high contact resistance. With the required high currents, the contact resistances of the solder joint are sufficient, provided that they are soldered with one of the usual solders to increase the efficiency of such To belittle the arrangement or to question it at all.

.Gemäß der Erfindung werden diese Nachteile dadurch vermieden, daß die beiden Schenkel des Elementes aus Metallpulver durch Pressen und Sintern hergestellt und miteinander verbunden sind. Man kann beispielsweise in eine entsprechend ausgebildete Preßform zwei verschiedene Metallpulver einfüllen, die d,irch eine dünne Zwischenwand getrennt sind. Es wird zunächst bei geringem Preßdruck vorgepreßt, die Zwischenwand entfernt und dann bei hohem Druck fertiggepreßt. Nach dem Pressen und Sintern sind die beiden Metalle so fest verbunden, daß der kleinstmögliche Kontaktwiderstand erreicht wird.. According to the invention, these disadvantages are avoided in that the two legs of the Element made of metal powder by pressing and sintering and bonded together. One can for example Pour two different metal powders into a correspondingly designed mold, which are separated by a thin partition. It will initially be at low Pre-pressed pressure, the partition removed and then finished pressed at high pressure. After pressing and sintering, the two metals are so firmly bonded that the smallest possible contact resistance is achieved.

Claims (1)

PATEINT ANSPNUCH: Thermoelement, insbesondere zur elektrothermischen Kälteerzeugung, dadurch gekennzeichnet, daß die beiden Schenkel des Elementes aus Metallpulver durch Pressen und Sintern hergestellt und miteinander verbunden sind.PATEINT ANSPNUCH: Thermocouple, especially for electrothermal Cold generation, characterized in that the two legs of the element from Metal powder produced by pressing and sintering and bonded together.
DES8462A 1950-06-14 1950-06-14 Thermocouple, especially for electrothermal generation of cold Expired DE836943C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES8462A DE836943C (en) 1950-06-14 1950-06-14 Thermocouple, especially for electrothermal generation of cold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES8462A DE836943C (en) 1950-06-14 1950-06-14 Thermocouple, especially for electrothermal generation of cold

Publications (1)

Publication Number Publication Date
DE836943C true DE836943C (en) 1952-04-17

Family

ID=7472761

Family Applications (1)

Application Number Title Priority Date Filing Date
DES8462A Expired DE836943C (en) 1950-06-14 1950-06-14 Thermocouple, especially for electrothermal generation of cold

Country Status (1)

Country Link
DE (1) DE836943C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059040A (en) * 1959-06-23 1962-10-16 Siemens Ag Method for producing sintered semiconductor bodies
DE1144927B (en) * 1959-02-04 1963-03-07 Inst Orts Und Netzgruppen Fern Process for the production of positive electrodes for thermocouples
DE1199342B (en) * 1960-07-21 1965-08-26 Nippon Electric Co Process for the manufacture of a thermocouple

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144927B (en) * 1959-02-04 1963-03-07 Inst Orts Und Netzgruppen Fern Process for the production of positive electrodes for thermocouples
US3059040A (en) * 1959-06-23 1962-10-16 Siemens Ag Method for producing sintered semiconductor bodies
DE1199342B (en) * 1960-07-21 1965-08-26 Nippon Electric Co Process for the manufacture of a thermocouple

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