JPH10253155A - Heat exchanger unit - Google Patents
Heat exchanger unitInfo
- Publication number
- JPH10253155A JPH10253155A JP6097097A JP6097097A JPH10253155A JP H10253155 A JPH10253155 A JP H10253155A JP 6097097 A JP6097097 A JP 6097097A JP 6097097 A JP6097097 A JP 6097097A JP H10253155 A JPH10253155 A JP H10253155A
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- Japan
- Prior art keywords
- primary
- pipe
- heat exchanger
- heat
- temperature
- 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.)
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Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、集合住宅の給湯・
暖房システム等に適用される熱交換器ユニットに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply for an apartment house.
The present invention relates to a heat exchanger unit applied to a heating system or the like.
【０００２】[0002]
【従来の技術】集合住宅の給湯・暖房システムは、図２
に示すように、ヒートポンプａ等の熱源機で加熱した一
次側熱媒体をポンプｂで各住戸に設置された熱交換器ユ
ニットｃの一次管ｄに圧送し、一次管ｄ内の一次側熱媒
体の熱を熱交換器ｅを介して二次管ｆ内の二次側媒体
（給湯水、暖房水および浴槽水等）に伝え、各住戸の給
湯水等を加熱するようにしている。2. Description of the Related Art A hot water supply / heating system for an apartment house is shown in FIG.
As shown in (1), a primary heat medium heated by a heat source device such as a heat pump a is pumped by a pump b to a primary pipe d of a heat exchanger unit c installed in each dwelling unit, and a primary heat medium in the primary pipe d is sent. Is transmitted to the secondary medium (hot water, heating water, bath tub water, etc.) in the secondary pipe f via the heat exchanger e to heat the hot water of each dwelling unit.
【０００３】従来の熱交換器ユニットｃは、一次管ｄの
流出側部に取り付けた熱媒弁ｇの全開−全閉のみにより
一次側熱媒体の流量を制御するもの、或いは二次管ｆの
流出側部に取り付けた温度センサｈの出力値に応じて、
二次側媒体の出口温度が一定になるように、上記熱媒弁
ｇにより一次側熱媒体の流量制御を行うものであった。The conventional heat exchanger unit c controls the flow rate of the primary heat medium only by fully opening and closing the heat medium valve g attached to the outlet side of the primary pipe d, or the heat exchanger unit c of the secondary pipe f. According to the output value of the temperature sensor h attached to the outflow side,
The heat medium valve g controls the flow rate of the primary heat medium so that the outlet temperature of the secondary medium is constant.
【０００４】[0004]
【発明が解決しようとする課題】ところで、熱源機にヒ
ートポンプｃを用いた場合には、熱効率の問題から一次
管ｄの流出側部よりヒートポンプａに戻る一次側熱媒体
の戻り温度を一定且つより低くすることが望ましい。When the heat pump c is used as the heat source unit, the return temperature of the primary heat medium returning to the heat pump a from the outlet side of the primary pipe d is kept constant and higher due to the problem of thermal efficiency. It is desirable to lower it.
【０００５】しかし、従来の熱交換器ユニットｃでは、
二次管ｆを流れる二次側媒体の熱的負荷（要求流量、要
求温度等）が変動すると、一次管ｄから二次管ｆへの放
熱量が変動するため、一次管ｄから流出する一次側熱媒
体の戻り温度が変動してしまい、また、場合によっては
一次側熱媒体の戻り温度が高くなることもあり、ヒート
ポンプａの熱効率の悪化を招いていた。However, in the conventional heat exchanger unit c,
If the thermal load (required flow rate, required temperature, etc.) of the secondary medium flowing through the secondary pipe f fluctuates, the amount of heat released from the primary pipe d to the secondary pipe f fluctuates, so that the primary flowing out of the primary pipe d The return temperature of the side heat medium fluctuates, and in some cases, the return temperature of the primary side heat medium may increase, leading to deterioration of the heat efficiency of the heat pump a.
【０００６】以上の事情を考慮して創案された本発明の
目的は、一次管から流出する一次側熱媒体の温度を一定
に制御できる熱交換器ユニットを提供することにある。An object of the present invention, which has been made in view of the above circumstances, is to provide a heat exchanger unit that can control the temperature of a primary heat medium flowing out of a primary pipe to be constant.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、一次側熱媒体が流れる一次管と、二次側媒
体が流れる二次管と、一次管の熱を二次管に伝える熱交
換器とを備えた熱交換器ユニットにおいて、上記一次管
の熱交換器からの流出側部に、一次側熱媒体の流出温度
を検出する温度センサを設けると共に、一次側熱媒体の
流出流量を制御する流量制御弁を設け、且つ上記温度セ
ンサの検出値に応じて一次側熱媒体の流出温度を所定範
囲とすべく上記流量制御弁の開度を調節する制御部を設
けたものである。In order to achieve the above object, the present invention provides a primary pipe through which a primary heat medium flows, a secondary pipe through which a secondary medium flows, and a secondary pipe which transfers heat of the primary pipe. And a temperature sensor for detecting the temperature of the primary heat medium flowing out of the primary pipe at the outflow side of the primary pipe from the heat exchanger. A flow control valve for controlling a flow rate, and a control unit for adjusting an opening degree of the flow control valve so as to keep an outflow temperature of the primary side heat medium in a predetermined range according to a detection value of the temperature sensor. is there.
【０００８】本発明によれば、二次管内を流れる二次側
媒体の熱的負荷の変動等に起因して一次管から流出する
一次側熱媒体の流出温度が変動すると、その流出温度を
検出する温度センサの検出値に応じて制御部が流量制御
弁の開度を調節することにより、二次側媒体の熱的負荷
の変動に応じて一次側熱媒体の流出流量が制御され、一
次側熱媒体の流出温度が所定範囲に制御される。According to the present invention, when the outflow temperature of the primary heat medium flowing out of the primary tube fluctuates due to the fluctuation of the thermal load of the secondary medium flowing in the secondary tube, the outflow temperature is detected. The control unit adjusts the opening of the flow control valve in accordance with the detection value of the temperature sensor, whereby the outflow flow rate of the primary heat medium is controlled according to the change in the thermal load of the secondary medium, and the primary side The outflow temperature of the heat medium is controlled within a predetermined range.
【０００９】また、上記一次管の流入側部と流出側部と
を、それぞれヒートポンプの吐出側部と吸込側部とに接
続すれば、一次側熱媒体のヒートポンプへの戻り温度が
所定範囲となるため、ヒートポンプの熱効率が向上す
る。If the inflow side and the outflow side of the primary pipe are connected to the discharge side and the suction side of the heat pump, respectively, the return temperature of the primary heat medium to the heat pump is within a predetermined range. Therefore, the heat efficiency of the heat pump is improved.
【００１０】また、上記二次管の熱交換器からの流出側
部を、その管内を流れる二次側媒体の温度とは異なった
温度の媒体をミキシングする温度調節手段に接続すれ
ば、二次側媒体の温度調節が可能となる。In addition, if the outlet side of the secondary pipe from the heat exchanger is connected to temperature control means for mixing a medium having a temperature different from the temperature of the secondary medium flowing in the pipe, the secondary side can be connected. The temperature of the side medium can be adjusted.
【００１１】なお、上記二次側媒体としては、給湯水ま
たは暖房水あるいは浴槽水等が考えられる。The secondary medium may be hot water, heating water, bath water, or the like.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施形態を添付
図面に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１３】図１は集合住宅の給湯・暖房システムを表
すものである。図示するように、熱源機としてのヒート
ポンプ１の吐出側部１ａには、一次側熱媒体往き管２が
接続されている。一次側熱媒体往き管２には、ヒートポ
ンプ１で生成された一次側熱媒体を各住戸に設置された
熱交換器ユニット３に圧送するためのポンプ４が介設さ
れている。他方、ヒートポンプ１の吸込側部１ｂには、
各熱交換器ユニット３で熱交換した後の一次側熱媒体を
戻すための一次側熱媒体戻り管５が接続されている。FIG. 1 shows a hot water supply / heating system of an apartment house. As shown in the figure, a primary-side heat medium delivery pipe 2 is connected to a discharge side 1a of a heat pump 1 as a heat source device. A pump 4 for pressure-feeding the primary heat medium generated by the heat pump 1 to the heat exchanger unit 3 installed in each dwelling unit is interposed in the primary heat medium going pipe 2. On the other hand, on the suction side 1b of the heat pump 1,
A primary-side heat medium return pipe 5 for returning the primary-side heat medium after heat exchange in each heat exchanger unit 3 is connected.
【００１４】一次側熱媒体往き管２には、各住戸に設置
された熱交換器ユニット３の位置に合わせて引出し管６
がそれぞれ接続されており、それら引出し管６には、各
熱交換器ユニット３の一次管７の流入側部７ａが、それ
ぞれ元バルブ８を介して接続されている。他方、一次側
熱媒体戻り管５には、同様にして引戻し管９がそれぞれ
接続されており、それら引戻し管９には、各熱交換器ユ
ニット３の一次管７の流出側部７ｂが、それぞれ元バル
ブ１０を介して接続されている。The primary heat medium outlet pipe 2 has a drawer pipe 6 corresponding to the position of the heat exchanger unit 3 installed in each dwelling unit.
The inflow side portions 7a of the primary tubes 7 of each heat exchanger unit 3 are connected to the extraction tubes 6 via the main valves 8, respectively. On the other hand, the return pipes 9 are similarly connected to the primary heat medium return pipe 5, and the return pipes 9 are connected to the outflow side portions 7b of the primary pipes 7 of the heat exchanger units 3 respectively. It is connected via the main valve 10.
【００１５】熱交換器ユニット３は、一次側熱媒体が流
れる一次管７と、二次側媒体が流れる二次管１１と、一
次管７の熱を二次管１１に伝える熱交換器１２とを備え
ている。一次管７は、上述のように、その流入側部７ａ
が引出し管６を介して一次側熱媒体往き管２に接続され
ており、流出側部７ｂが引戻し管９を介して一次側熱媒
体戻り管５に接続されている。二次管１１は、その流入
側部１１ａが水道等に接続されており、流出側部１１ｂ
が給湯水・暖房水・浴槽水等の利用設備に接続されてい
る。なお、二次側媒体を給湯水・暖房水・浴槽水として
それぞれ利用するときには、上記熱交換器１２がそれぞ
れ給湯用・暖房用・風呂追焚用の熱交換器となる。The heat exchanger unit 3 includes a primary tube 7 through which a primary-side heat medium flows, a secondary tube 11 through which a secondary-side medium flows, and a heat exchanger 12 that transmits heat of the primary tube 7 to the secondary tube 11. It has. The primary pipe 7 has its inflow side 7a as described above.
Are connected to the primary-side heat medium return pipe 2 via the extraction pipe 6, and the outflow side portion 7 b is connected to the primary-side heat medium return pipe 5 via the return pipe 9. The secondary pipe 11 has an inflow side 11a connected to a water supply or the like, and an outflow side 11b.
Are connected to facilities that use hot water, heating water, bath water, etc. When the secondary medium is used as hot water, heating water, and bath water, respectively, the heat exchangers 12 serve as heat exchangers for hot water supply, heating, and reheating of the bath.
【００１６】上記一次管７の流出側部７ｂには、一次側
熱媒体の流出温度を検出する温度センサ１３が設けられ
ていると共に、一次側熱媒体の流出流量を制御する流量
制御弁１４が設けられている。本実施形態では温度セン
サ１３が流量制御弁１４より上流側に配置されている
が、逆に配置してもよい。温度センサ１３には、当該温
度センサ１３の検出値に応じて上記流量制御弁１４の開
度を調節し、一次側熱媒体から二次側媒体への放熱量を
調節することにより、二次側媒体の熱的負荷（要求流
量、要求温度等）の変動に拘らず、一次側熱媒体の流出
温度を所定範囲に制御する制御部１５が接続されてい
る。The outlet side 7b of the primary pipe 7 is provided with a temperature sensor 13 for detecting the outlet temperature of the primary heat medium, and a flow control valve 14 for controlling the outlet flow rate of the primary heat medium. Is provided. In the present embodiment, the temperature sensor 13 is disposed upstream of the flow control valve 14, but may be disposed in reverse. The temperature sensor 13 adjusts the opening degree of the flow control valve 14 in accordance with the detection value of the temperature sensor 13 and adjusts the amount of heat released from the primary heat medium to the secondary medium. The control unit 15 is connected to control the outflow temperature of the primary heat medium within a predetermined range regardless of fluctuations in the thermal load (required flow rate, required temperature, etc.) of the medium.
【００１７】以上の構成からなる本実施形態の作用を述
べる。The operation of this embodiment having the above configuration will be described.
【００１８】例えば、二次管１１内を流れる二次側媒体
の熱的負荷が大きくなった場合（要求流量が増えたり要
求温度が高くなった場合）には、一次管７内の一次側熱
媒体が二次管１１内の二次側媒体によって冷却され易く
なるため、一次側熱媒体の流出温度が下がる。すると、
その温度低下を温度センサ１３が検出し、その検出値に
応じて制御部１５が流量制御弁１４の開度を所定量開い
て一次側熱媒体の一次管７内の通過流量を増やし、一次
側熱媒体の流出温度の上昇を図る。For example, when the thermal load on the secondary medium flowing in the secondary pipe 11 increases (when the required flow rate increases or the required temperature increases), the primary heat in the primary pipe 7 is reduced. Since the medium is easily cooled by the secondary medium in the secondary pipe 11, the outflow temperature of the primary heat medium is reduced. Then
The temperature sensor 13 detects the temperature drop, and the control unit 15 opens the opening of the flow control valve 14 by a predetermined amount in accordance with the detected value to increase the flow rate of the primary heat medium through the primary pipe 7, Increase the outflow temperature of the heat medium.
【００１９】逆に、二次管１１内を流れる二次側媒体の
熱的負荷が小さくなった場合（要求流量が減ったり要求
温度が低くなった場合）には、一次管７内の一次側熱媒
体が二次管１１内の二次側媒体によって冷却されにくく
なるため、一次側熱媒体の流出温度が上がる。すると、
その温度上昇を温度センサ１３が検出し、その検出値に
応じて制御部１５が流量制御弁１４の開度を所定量絞っ
て一次側熱媒体の一次管７内の通過流量を減らし、一次
側熱媒体の流出温度の低下を図る。Conversely, when the thermal load on the secondary medium flowing through the secondary pipe 11 is reduced (when the required flow rate is reduced or the required temperature is reduced), the primary side of the primary pipe 7 is reduced. Since the heat medium is less likely to be cooled by the secondary medium in the secondary pipe 11, the outflow temperature of the primary heat medium increases. Then
The temperature sensor 13 detects the temperature rise, and the control unit 15 reduces the opening of the flow control valve 14 by a predetermined amount in accordance with the detected value to reduce the flow rate of the primary heat medium passing through the primary pipe 7, Reduce the temperature at which the heat medium flows out.
【００２０】かかる制御により、二次管１１内を流れる
二次側媒体の熱的負荷の変動に拘らず、一次管７から流
出する一次側熱媒体の流出温度が所定範囲に制御され
る。これにより、ヒートポンプ１の吸込側部１ｂへ戻る
一次側熱媒体の戻り温度が所定範囲に制御されることと
なり、ヒートポンプ１の熱効率が安定して向上する。ま
た、上述のように、無制御では高まってしまう一次側熱
媒体の戻り温度を、本実施形態では一次側熱媒体の流出
流量を絞ることによって低く制御できるので、ヒートポ
ンプ１の熱効率が高まる。よって、ヒートポンプ１の能
力を最大限に活かすことが可能となる。With this control, the outflow temperature of the primary heat medium flowing out of the primary pipe 7 is controlled within a predetermined range regardless of fluctuations in the thermal load of the secondary medium flowing in the secondary pipe 11. Thereby, the return temperature of the primary-side heat medium returning to the suction side portion 1b of the heat pump 1 is controlled within a predetermined range, and the heat efficiency of the heat pump 1 is stably improved. In addition, as described above, the return temperature of the primary heat medium, which increases without control, can be controlled to be low by reducing the outflow flow rate of the primary heat medium in the present embodiment, so that the heat efficiency of the heat pump 1 increases. Therefore, it is possible to make the most of the capability of the heat pump 1.
【００２１】また、上記制御は、各住戸からヒートポン
プ１に戻される一次側熱媒体の流出流量を流量制御弁１
４で絞って行っているので、結果として一住戸当たりの
一次側熱媒体の使用量を最小限に抑えることができる。
よって、集合住宅の給湯・暖房システム全体の一次側熱
媒体の流量を減らすことができ、配管２，５，６，７，
９等のサイズダウンおよびポンプ４の小型化が可能とな
る。Further, the above control is performed by controlling the flow rate of the primary heat medium returned from each dwelling unit to the heat pump 1 by the flow control valve 1.
4, the amount of use of the primary heat medium per dwelling unit can be minimized as a result.
Therefore, it is possible to reduce the flow rate of the primary heat medium of the entire hot water supply / heating system of the apartment house, and the pipes 2, 5, 6, 7, and
Thus, the size of the pump 4 can be reduced and the size of the pump 4 can be reduced.
【００２２】また、上記二次管１１の流出側部１１ｂ
を、その管内を流れる二次側媒体（給湯水等）の温度よ
り低温の媒体（水道等水）をミキシングする図示しない
温度調節手段に接続してもよい。こうすれば、二次側媒
体がある一定温度以上あれば、二次側媒体（給湯水等）
の温度を自由に調節できる。また、熱交換器１２の特性
上、一次側熱媒体の戻り温度を制御すると、結果として
二次側媒体の流出温度も制御されるため、使用上の大き
な問題は生じない。The outflow side portion 11b of the secondary pipe 11
May be connected to a temperature control unit (not shown) that mixes a medium (water such as tap water) lower than the temperature of the secondary medium (hot water or the like) flowing in the pipe. In this way, if the secondary medium is above a certain temperature, the secondary medium (hot water, etc.)
Temperature can be adjusted freely. Further, when the return temperature of the primary heat medium is controlled due to the characteristics of the heat exchanger 12, the outflow temperature of the secondary medium is also controlled as a result, so that there is no major problem in use.
【００２３】[0023]
【発明の効果】以上説明したように本発明によれば、次
のような優れた効果を発揮できる。As described above, according to the present invention, the following excellent effects can be exhibited.
【００２４】(1) 請求項１記載の発明によれば、二次管
内を流れる二次側媒体の熱的負荷の変動に拘らず、一次
管から流出する一次側熱媒体の流出流量を所定範囲に制
御できる。(1) According to the first aspect of the present invention, the outflow flow rate of the primary-side heat medium flowing out of the primary pipe is set to a predetermined range regardless of the fluctuation of the thermal load of the secondary medium flowing in the secondary pipe. Can be controlled.
【００２５】(2) 請求項２記載の発明によれば、ヒート
ポンプの熱効率を向上させることができる。(2) According to the second aspect of the invention, the heat efficiency of the heat pump can be improved.
【００２６】(3) 請求項３記載の発明によれば、二次側
媒体の温度を自在に調節できる。(3) According to the third aspect of the invention, the temperature of the secondary medium can be freely adjusted.
【００２７】(4) 請求項４記載の発明によれば、給湯・
暖房システムを実現できる。(4) According to the invention described in claim 4, hot water supply
A heating system can be realized.
【図１】本発明の一実施形態としての熱交換器ユニット
を備えた集合住宅の給湯・暖房システムを表す図であるFIG. 1 is a diagram showing a hot water supply / heating system of an apartment house equipped with a heat exchanger unit as one embodiment of the present invention.
【図２】従来例の熱交換器ユニットを示す図である。FIG. 2 is a view showing a conventional heat exchanger unit.
１ ヒートポンプ １ａ 吐出側部 １ｂ 吸込側部 ３ 熱交換器ユニット ７ 一次管 ７ａ 流入側部 ７ｂ 流出側部 １１ 二次管 １２ 熱交換器 １３ 温度センサ １４ 流量制御弁 １５ 制御部 DESCRIPTION OF SYMBOLS 1 Heat pump 1a Discharge side 1b Suction side 3 Heat exchanger unit 7 Primary pipe 7a Inflow side 7b Outflow side 11 Secondary pipe 12 Heat exchanger 13 Temperature sensor 14 Flow control valve 15 Control part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂本 康弘 東京都千代田区内幸町一丁目１番３号 東 京電力株式会社内 (72)発明者 白石 雄三 茨城県土浦市木田余町3550番地 日立電線 株式会社土浦工場内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuhiro Sakamoto 1-3-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Yuzo Shiraishi 3550 Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Hitachi Cable, Ltd. Inside Tsuchiura Plant
Claims (4)
媒体が流れる二次管と、一次管の熱を二次管に伝える熱
交換器とを備えた熱交換器ユニットにおいて、上記一次
管の熱交換器からの流出側部に、一次側熱媒体の流出温
度を検出する温度センサを設けると共に、一次側熱媒体
の流出流量を制御する流量制御弁を設け、且つ上記温度
センサの検出値に応じて一次側熱媒体の流出温度を所定
範囲とすべく上記流量制御弁の開度を調節する制御部を
設けたことを特徴とする熱交換器ユニット。1. A heat exchanger unit comprising: a primary pipe through which a primary-side heat medium flows, a secondary pipe through which a secondary-side medium flows, and a heat exchanger that transfers heat of the primary pipe to the secondary pipe. At the outflow side of the primary pipe from the heat exchanger, a temperature sensor for detecting the outflow temperature of the primary heat medium is provided, and a flow control valve for controlling the outflow flow rate of the primary heat medium is provided, and the temperature sensor A heat exchanger unit, comprising: a control unit that adjusts an opening of the flow control valve so that an outflow temperature of the primary heat medium falls within a predetermined range according to a detected value.
それぞれヒートポンプの吐出側部と吸込側部とに接続さ
れた請求項１記載の熱交換器ユニット。2. An inflow side and an outflow side of the primary pipe,
The heat exchanger unit according to claim 1, wherein the heat exchanger units are connected to a discharge side and a suction side of the heat pump, respectively.
が、その管内を流れる二次側媒体の温度とは異なった温
度の媒体をミキシングする温度調節手段に接続された請
求項１記載の熱交換器ユニット。3. An outlet side of the secondary pipe from the heat exchanger is connected to a temperature control means for mixing a medium having a temperature different from a temperature of a secondary medium flowing through the pipe. A heat exchanger unit as described.
あるいは浴槽水である請求項１記載の熱交換器ユニッ
ト。4. The heat exchanger unit according to claim 1, wherein the secondary medium is hot water, heating water, or bath water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6097097A JPH10253155A (en) | 1997-03-14 | 1997-03-14 | Heat exchanger unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6097097A JPH10253155A (en) | 1997-03-14 | 1997-03-14 | Heat exchanger unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10253155A true JPH10253155A (en) | 1998-09-25 |
Family
ID=13157796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6097097A Pending JPH10253155A (en) | 1997-03-14 | 1997-03-14 | Heat exchanger unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10253155A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003069236A1 (en) * | 2002-02-12 | 2003-08-21 | Matsushita Electric Industrial Co., Ltd. | Heat pump water heater |
| US7260940B2 (en) | 2002-12-13 | 2007-08-28 | The Tokyo Electric Power Company, Incorporated | Heat pump using gas hydrate, and heat utilizing apparatus |
| CN103154833A (en) * | 2010-08-05 | 2013-06-12 | 康可技术股份有限公司 | Thermal conductive cooling method and system for livestock operations |
-
1997
- 1997-03-14 JP JP6097097A patent/JPH10253155A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003069236A1 (en) * | 2002-02-12 | 2003-08-21 | Matsushita Electric Industrial Co., Ltd. | Heat pump water heater |
| US7316267B2 (en) | 2002-02-12 | 2008-01-08 | Matsushita Electric Industrial Co., Ltd. | Heat pump water device |
| US7260940B2 (en) | 2002-12-13 | 2007-08-28 | The Tokyo Electric Power Company, Incorporated | Heat pump using gas hydrate, and heat utilizing apparatus |
| CN103154833A (en) * | 2010-08-05 | 2013-06-12 | 康可技术股份有限公司 | Thermal conductive cooling method and system for livestock operations |
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