JP2004190884A - Peltier-type cooling device and method of using the same - Google Patents

Peltier-type cooling device and method of using the same Download PDF

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Publication number
JP2004190884A
JP2004190884A JP2002356450A JP2002356450A JP2004190884A JP 2004190884 A JP2004190884 A JP 2004190884A JP 2002356450 A JP2002356450 A JP 2002356450A JP 2002356450 A JP2002356450 A JP 2002356450A JP 2004190884 A JP2004190884 A JP 2004190884A
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Prior art keywords
peltier
peltier element
power supply
heat
cooling device
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Yoshikazu Watanabe
義和 渡辺
Keishin Ito
佳信 伊東
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Nitto Kogyo Corp
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Nitto Kogyo Corp
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Priority to JP2002356450A priority Critical patent/JP2004190884A/en
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    • 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
    • F25B2321/021—Control thereof
    • F25B2321/0212—Control thereof of electric power, current or voltage

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  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Patch Boards (AREA)

Abstract

【課題】ペルチェ素子の劣化や構造の複雑化を招くことなく、結露による故障を防止することができ、ヒータとしても使用することができるペルチェ式冷却装置を提供する。
【解決手段】ペルチェ素子１を直流と交流とに切り替え可能な電源装置に接続する。ペルチェ素子１の吸熱側に結露が検出されたとき、電源装置を直流から交流に切り替えてジュール熱を発生させ、結露を蒸発させる。またペルチェ素子１をヒータとして使用するときは、ペルチェ素子１の放熱側のファンを停止し、ペルチェ素子の電源装置を直流から交流に切り替えてジュール熱を発生させる。
【選択図】 図１An object of the present invention is to provide a Peltier-type cooling device that can prevent a failure due to dew condensation without causing deterioration of a Peltier element and complicated structure, and can be used as a heater.
A Peltier device is connected to a power supply device that can switch between DC and AC. When dew condensation is detected on the heat absorption side of the Peltier element 1, the power supply device is switched from DC to AC to generate Joule heat and evaporate the dew. When the Peltier element 1 is used as a heater, the fan on the heat radiation side of the Peltier element 1 is stopped, and the power supply of the Peltier element is switched from DC to AC to generate Joule heat.
[Selection diagram] Fig. 1

Description

【０００１】
【発明の属する技術分野】
本発明は、電気電子機器収納盤などの冷却手段として用いることができるペルチェ式冷却装置及びその使用方法に関するものである。
【０００２】
【従来の技術】
【特許文献１】特公平３−５９６４１号公報
【特許文献２】実公昭４１−１８９８８号公報
【０００３】
上記の特許文献１に示されるように、配電盤、分電盤などの電気電子機器収納盤の冷却手段として、従来からペルチェ式冷却装置が知られている。ペルチェ式冷却装置は、ペルチェ素子に通電するとその片面が吸熱面、反対面が放熱面となることを利用して冷却を行わせる装置であり、その電源には当然に直流電源が用いられている。
【０００４】
ところが特に屋外設置型の盤においては、外気温が低下するとペルチェ素子の吸熱側の表面温度が露点以下にまで低下し、結露を生じることがあった。そして結露水が電極内部に溜まると電極がショートしたり、錆びたりして故障の原因となり易いという問題があった。また冬季などにおいては盤内温度が下がりすぎ、ヒータを別に設けて加熱しなければならない場合があった。
【０００５】
そこで上記の特許文献１には、ヒータが必要となった場合には直流電源の通電方向を逆転させて盤内を保温する技術が記載されている。しかしこのように通電方向を逆転させると、それまで吸熱側であった面が急激に発熱することとなり、逆に放熱側であった面が急激に冷却されることとなるため、ヒートショックによってペルチェ素子の劣化を早めるおそれがあった。また上記の特許文献２には、防湿性物質と防湿枠によって結露の侵入を防止する技術が記載されている。しかし構造が複雑でコストが高くなるという問題があった。
【０００６】
【発明が解決しようとする課題】
本発明は上記した従来の問題点を解決するためになされたものであって、その第１の目的はペルチェ素子の劣化や構造の複雑化を招くことなく、結露による故障を防止することができるペルチェ式冷却装置及びその使用方法を提供することである。また本発明の第２の目的は、ペルチェ素子の劣化や構造の複雑化を招くことなく、ヒータとしても使用することができるペルチェ式冷却装置及びその使用方法を提供することである。
【０００７】
【課題を解決するための手段】
上記の課題を解決するためになされた請求項１の発明のペルチェ式冷却装置は、ペルチェ素子を、直流と交流とに切り替え可能な電源装置に接続したことを特徴とするものである。また請求項２の発明は、ペルチェ素子の吸熱側に結露が検出されたとき、ペルチェ素子の電源装置を直流から交流に切り替えてジュール熱を発生させ、結露を蒸発させることを特徴とするものである。さらに請求項３の発明は、ペルチェ素子の放熱側のファンを停止し、ペルチェ素子の電源装置を直流から交流に切り替えてジュール熱を発生させ、ペルチェ素子をヒータとして使用することを特徴とするものである。
【０００８】
【発明の実施の形態】
以下に本発明の好ましい実施形態を示す。
図１は請求項１，２の発明の実施形態を示す図である。図中、１はペルチェ素子であり、２枚の電極２，３の間にＰ形及びＮ形の半導体素子４を多数配置し、閉回路を構成したものである。このペルチェ素子１に接続される電源装置は、以下に説明するとおり直流と交流とに切り替え可能となっている。
【０００９】
５は商用の交流電源であり、６は整流用のダイオードブリッジである。これらの間に設けられた切り替えスイッチ７を図の上側に切り替え、スイッチ８をオンにすると直流がペルチェ素子１に流れ、従来通りに片側の電極２が吸熱面となり、反対側の電極３が放熱面となる。このため、吸熱面側にヒートシンクを設けて盤内に配置すれば、冷却装置として機能する。
【００１０】
また、切り替えスイッチ７を図の下側に切り替えれば、交流がペルチェ素子１に流れる。このときにはスイッチ８はオフとなるよう、切り替えスイッチ７と連動式としておくことが好ましい。このようにしてペルチェ素子１に交流電流を通電すると、ペルチェ素子１の半導体素子４の全体がジュール熱により緩やかに発熱する。このため、ペルチェ素子１に結露検出用のセンサ１０を取り付け、結露が検出されたときに自動的に電源を交流に切り替えれば、ペルチェ素子１の結露を蒸発させることができる。 しかもこのジュール熱による加熱は全体が均一に発熱するうえに、従来の直流通電方向の反転方式のように急激な温度変化を伴わないので、ペルチェ素子１を劣化させることがない。
【００１１】
図２は請求項３の発明の実施形態を示す図である。図示のように盤内と盤外を区画する隔壁１２にペルチェ素子１が取り付けられており、両側にヒートシンク１３，１４とファン１５，１６が配置されている。図示されていないが、このペルチェ素子１の電源装置は直流と交流とに切り替え可能となっている。
【００１２】
通常運転時には、両側のファン１５，１６を動作させて盤内側から吸熱した熱量を盤外に放熱しているが、盤内温度が低下した場合には図示しない温度センサにより電源を交流に切り替え、前記したようにジュール熱を発生させる。また放熱側のファン１５を停止する。この結果、ペルチェ素子１で発生したジュール熱は盤外側には放出されず、ファン１６によって盤内側に送られるので、ペルチェ素子１をヒータとして利用した盤内保温が可能となる。この場合にも、従来の直流通電方向の反転方式のように急激な温度変化を伴わないので、ペルチェ素子１を劣化させることがない。
【００１３】
【発明の効果】
以上に説明したように、請求項１，２の発明によれば、ペルチェ素子の劣化を招くことなく、結露によるペルチェ式冷却装置の故障を防止することができる。また請求項１，３の発明によれば、ペルチェ素子の劣化を招くことなく、ペルチェ式冷却装置をヒータとしても使用することができる。しかもペルチェ素子自体の構造を複雑化させることもない。このため本発明は、配電盤、分電盤などの電気電子機器収納盤の冷却手段として好適なものであるが、その他の用途にも適用できることはいうまでもない。
【図面の簡単な説明】
【図１】第１の実施形態を示す配線図である。
【図２】第２の実施形態を示す断面図である。
【符号の説明】
１ ペルチェ素子
２ 電極
３ 電極
４ 半導体素子
５ 交流電源
６ ダイオードブリッジ
７ 切り替えスイッチ
８ スイッチ
９ コンデンサ
１０ 結露検出用のセンサ
１２ 隔壁
１３ ヒートシンク
１４ ヒートシンク
１５ ファン
１６ ファン[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a Peltier-type cooling device that can be used as a cooling means for an electric / electronic equipment storage panel and the like, and a method of using the same.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Publication No. 3-59641 [Patent Document 2] Japanese Utility Model Publication No. 41-18988 [0003]
As disclosed in Patent Document 1, a Peltier-type cooling device is conventionally known as a cooling means for an electric and electronic equipment storage panel such as a switchboard or a distribution board. The Peltier-type cooling device is a device that performs cooling by utilizing that one side of the Peltier element becomes a heat absorbing surface and the other side becomes a heat releasing surface when a Peltier element is energized, and a DC power supply is naturally used as the power supply. .
[0004]
However, especially in the case of an outdoor-installed panel, when the outside air temperature decreases, the surface temperature on the heat absorption side of the Peltier element decreases to below the dew point, which may cause dew condensation. When the dew condensation water accumulates inside the electrode, there is a problem that the electrode is short-circuited or rusted and easily causes a failure. Further, in the winter season or the like, the temperature inside the panel may be too low, and it may be necessary to provide a separate heater for heating.
[0005]
Therefore, Patent Document 1 described above discloses a technique in which when a heater is required, the direction of energization of a DC power supply is reversed to keep the inside of the panel warm. However, if the direction of current flow is reversed in this way, the surface that had been on the heat absorption side would generate heat rapidly, and the surface that was on the heat dissipation side would be rapidly cooled. There is a possibility that the deterioration of the element may be accelerated. Patent Document 2 described above discloses a technique for preventing dew condensation from entering by using a moisture-proof substance and a moisture-proof frame. However, there is a problem that the structure is complicated and the cost is high.
[0006]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned conventional problems, and a first object of the present invention is to prevent a failure due to dew condensation without causing deterioration of the Peltier element and complicated structure. An object of the present invention is to provide a Peltier cooling device and a method of using the same. A second object of the present invention is to provide a Peltier-type cooling device that can be used as a heater without deteriorating the Peltier element and complicating the structure, and a method of using the same.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a Peltier-type cooling device, wherein the Peltier device is connected to a power supply device that can switch between DC and AC. The invention according to claim 2 is characterized in that, when dew condensation is detected on the heat absorption side of the Peltier element, the power supply device of the Peltier element is switched from DC to AC to generate Joule heat and evaporate the dew. is there. The invention according to claim 3 is characterized in that the fan on the heat radiation side of the Peltier element is stopped, the power supply of the Peltier element is switched from DC to AC to generate Joule heat, and the Peltier element is used as a heater. It is.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a diagram showing an embodiment of the first and second aspects of the present invention. In the figure, reference numeral 1 denotes a Peltier element, which is a closed circuit in which a number of P-type and N-type semiconductor elements 4 are arranged between two electrodes 2 and 3. The power supply device connected to the Peltier element 1 can be switched between DC and AC as described below.
[0009]
Reference numeral 5 denotes a commercial AC power supply, and reference numeral 6 denotes a rectifying diode bridge. When the changeover switch 7 provided between them is switched to the upper side of the figure and the switch 8 is turned on, a direct current flows to the Peltier element 1, and the electrode 2 on one side becomes a heat absorbing surface and the electrode 3 on the other side dissipates heat as usual. Surface. Therefore, if a heat sink is provided on the heat absorbing surface side and arranged in the panel, it functions as a cooling device.
[0010]
If the changeover switch 7 is switched to the lower side of the figure, an alternating current flows to the Peltier device 1. At this time, it is preferable that the switch 8 is turned off so as to be interlocked with the changeover switch 7. When an alternating current is applied to the Peltier element 1 in this manner, the entire semiconductor element 4 of the Peltier element 1 slowly generates heat due to Joule heat. For this reason, if the dew condensation detection sensor 10 is attached to the Peltier element 1 and the power supply is automatically switched to AC when the dew condensation is detected, the dew condensation on the Peltier element 1 can be evaporated. Moreover, the heating by Joule heat generates heat uniformly and does not involve a rapid temperature change unlike the conventional method of reversing the direction of direct current, so that the Peltier element 1 does not deteriorate.
[0011]
FIG. 2 is a diagram showing an embodiment of the third aspect of the present invention. As shown in the drawing, a Peltier element 1 is attached to a partition wall 12 that partitions the inside and outside of the board, and heat sinks 13 and 14 and fans 15 and 16 are arranged on both sides. Although not shown, the power supply of the Peltier element 1 can be switched between DC and AC.
[0012]
During normal operation, the fans 15 and 16 on both sides are operated to release the heat absorbed from the inside of the panel to the outside of the panel. However, when the temperature in the panel decreases, the power is switched to AC by a temperature sensor (not shown). Joule heat is generated as described above. The fan 15 on the heat radiation side is stopped. As a result, the Joule heat generated in the Peltier element 1 is not released to the outside of the panel, but is sent to the inside of the panel by the fan 16, so that the temperature inside the panel can be maintained using the Peltier element 1 as a heater. Also in this case, the Peltier element 1 is not deteriorated because it does not involve a rapid temperature change unlike the conventional method of reversing the direction of direct current.
[0013]
【The invention's effect】
As described above, according to the first and second aspects of the present invention, it is possible to prevent the Peltier-type cooling device from malfunctioning due to condensation without deteriorating the Peltier device. Further, according to the first and third aspects of the present invention, the Peltier cooling device can be used as a heater without deteriorating the Peltier element. Moreover, the structure of the Peltier element itself is not complicated. For this reason, the present invention is suitable as a cooling means for electrical and electronic equipment storage boards such as a switchboard and a distribution board, but it goes without saying that the present invention can be applied to other uses.
[Brief description of the drawings]
FIG. 1 is a wiring diagram illustrating a first embodiment.
FIG. 2 is a cross-sectional view illustrating a second embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Peltier element 2 Electrode 3 Electrode 4 Semiconductor element 5 AC power supply 6 Diode bridge 7 Changeover switch 8 Switch 9 Capacitor 10 Sensor for detecting condensation 12 Partition wall 13 Heat sink 14 Heat sink 15 Fan 16 Fan

Claims (3)

ペルチェ素子を、直流と交流とに切り替え可能な電源装置に接続したことを特徴とするペルチェ式冷却装置。A Peltier cooling device, wherein the Peltier device is connected to a power supply device capable of switching between DC and AC. ペルチェ素子の吸熱側に結露が検出されたとき、ペルチェ素子の電源装置を直流から交流に切り替えてジュール熱を発生させ、結露を蒸発させることを特徴とするペルチェ式冷却装置の使用方法。A method of using a Peltier-type cooling device, wherein when dew condensation is detected on the heat absorption side of a Peltier element, a power supply of the Peltier element is switched from DC to AC to generate Joule heat and evaporate the dew. ペルチェ素子の放熱側のファンを停止し、ペルチェ素子の電源装置を直流から交流に切り替えてジュール熱を発生させ、ペルチェ素子をヒータとして使用することを特徴とするペルチェ式冷却装置の使用方法。A method of using a Peltier-type cooling device, comprising: stopping a fan on a heat radiation side of a Peltier element; switching a Peltier element power supply from DC to AC to generate Joule heat; and using the Peltier element as a heater.
JP2002356450A 2002-12-09 2002-12-09 Peltier-type cooling device and method of using the same Pending JP2004190884A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007198718A (en) * 2005-12-27 2007-08-09 Toppan Printing Co Ltd Temperature control method
JP2009158814A (en) * 2007-12-27 2009-07-16 Fujitsu Ltd Temperature control device
CN104343713A (en) * 2014-01-20 2015-02-11 上海新时达电气股份有限公司 Failure detection circuit of alternating current fan
CN107732730A (en) * 2017-11-28 2018-02-23 天津城建大学 A kind of power distribution cabinet dehumidification system based on semiconductor chilling plate
CN111884084A (en) * 2020-08-04 2020-11-03 南安市工业学校 Electrical control cabinet with heat dissipation function and use method thereof
DE102020212040A1 (en) 2020-09-24 2022-03-24 Mahle International Gmbh Process for operating a heat exchanger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007198718A (en) * 2005-12-27 2007-08-09 Toppan Printing Co Ltd Temperature control method
JP2009158814A (en) * 2007-12-27 2009-07-16 Fujitsu Ltd Temperature control device
CN104343713A (en) * 2014-01-20 2015-02-11 上海新时达电气股份有限公司 Failure detection circuit of alternating current fan
CN107732730A (en) * 2017-11-28 2018-02-23 天津城建大学 A kind of power distribution cabinet dehumidification system based on semiconductor chilling plate
CN111884084A (en) * 2020-08-04 2020-11-03 南安市工业学校 Electrical control cabinet with heat dissipation function and use method thereof
DE102020212040A1 (en) 2020-09-24 2022-03-24 Mahle International Gmbh Process for operating a heat exchanger

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