JPH05264108A - Refrigeration device - Google Patents
Refrigeration deviceInfo
- Publication number
- JPH05264108A JPH05264108A JP6018592A JP6018592A JPH05264108A JP H05264108 A JPH05264108 A JP H05264108A JP 6018592 A JP6018592 A JP 6018592A JP 6018592 A JP6018592 A JP 6018592A JP H05264108 A JPH05264108 A JP H05264108A
- Authority
- JP
- Japan
- Prior art keywords
- water
- refrigerant
- compressor
- evaporator
- heat exchanger
- 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.)
- Withdrawn
Links
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- Air Conditioning Control Device (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は冷凍装置の冷却熱源の節
減及び液もどり防止を図った冷凍装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus for saving the cooling heat source of the refrigerating apparatus and preventing liquid from returning.
【0002】[0002]
【従来の技術】従来の冷凍装置の冷媒系統図を図4に示
す。2. Description of the Related Art FIG. 4 shows a refrigerant system diagram of a conventional refrigeration system.
【0003】1は圧縮機、2は水冷凝縮器、3は絞り
弁、4は蒸発器、6は水冷凝縮器2への水ポンプであ
る。圧縮機1を出た高温高圧の冷媒は水冷凝縮器2で冷
却・液化され、絞り弁3で絞り込まれ断熱膨張し、蒸発
器4で吸熱し圧縮機1に戻る。水ポンプ6で水を水冷凝
縮器2に送り、高温高圧冷媒と水とが熱交換される。蒸
発器4の冷凍負荷が減少すると蒸発器4で蒸発しきれな
い未蒸発冷媒が圧縮機1に戻ることになる。Reference numeral 1 is a compressor, 2 is a water-cooled condenser, 3 is a throttle valve, 4 is an evaporator, and 6 is a water pump to the water-cooled condenser 2. The high-temperature and high-pressure refrigerant that has exited the compressor 1 is cooled and liquefied by the water-cooled condenser 2, narrowed down by the throttle valve 3 and adiabatically expanded, and absorbs heat by the evaporator 4 and returns to the compressor 1. The water pump 6 sends water to the water-cooled condenser 2, and the high-temperature high-pressure refrigerant and water are heat-exchanged. When the refrigerating load of the evaporator 4 decreases, the non-evaporated refrigerant that cannot be completely evaporated in the evaporator 4 returns to the compressor 1.
【0004】また、図5は従来の液・ガス熱交換器付冷
凍装置の冷媒系統図で、1は圧縮機、2は水冷凝縮器、
3は絞り弁、4は蒸発器、5はレシーバ、6は水ポン
プ、7は液・ガス熱交換器である。FIG. 5 is a refrigerant system diagram of a conventional refrigeration system with a liquid / gas heat exchanger, 1 is a compressor, 2 is a water-cooled condenser,
3 is a throttle valve, 4 is an evaporator, 5 is a receiver, 6 is a water pump, and 7 is a liquid / gas heat exchanger.
【0005】圧縮機1を出た高温高圧の冷媒はポンプ6
で水を給水される水冷凝縮器2で冷却・液化され、レシ
ーバ5を介して液・ガス熱交換器7に入り、ここで、放
熱し、絞り弁3で絞られて断熱膨張し、蒸発器4で吸熱
し、蒸発器4を出た低温の冷媒蒸気とレシーバ5を出
て、絞り弁3に入る高圧液冷媒とを熱交換させ、再び液
・ガス熱交換器7を介して圧縮機1の吸込み冷媒蒸気を
過熱させて、未蒸発冷媒を該熱により蒸発させて、気化
した冷媒を圧縮機1に戻すようにする。図6はそのモリ
エル線図である。The high-temperature and high-pressure refrigerant discharged from the compressor 1 is pumped by the pump 6.
Is cooled and liquefied by the water-cooled condenser 2 which is supplied with water, enters the liquid / gas heat exchanger 7 via the receiver 5, where heat is radiated, and is adiabatically expanded by being throttled by the throttle valve 3 and the evaporator. 4, the low-temperature refrigerant vapor that has left the evaporator 4 and the high-pressure liquid refrigerant that exits the receiver 5 and enters the throttle valve 3 are heat-exchanged, and again through the liquid / gas heat exchanger 7, the compressor 1 The vaporized refrigerant is superheated, the non-evaporated refrigerant is evaporated by the heat, and the vaporized refrigerant is returned to the compressor 1. FIG. 6 is a Mollier diagram.
【0006】[0006]
【発明が解決しようとする課題】上記従来の冷凍装置に
は解決すべき次の課題があった。The above conventional refrigeration system has the following problems to be solved.
【0007】即ち、図4の装置では冷凍負荷が減少する
ことによって、蒸発器4で蒸発しきれない未蒸発冷媒が
圧縮機1に液冷媒の状態で戻ることになるが液冷媒の状
態で冷媒が圧縮機1に戻ると液圧縮となって圧縮機1の
損傷につながるという不具合があった。That is, in the apparatus shown in FIG. 4, the refrigeration load is reduced, so that the non-evaporated refrigerant that cannot be evaporated in the evaporator 4 returns to the compressor 1 in the liquid refrigerant state. However, there is a problem in that the liquid is compressed when it returns to the compressor 1 and damages the compressor 1.
【0008】また、図5のように冷却能力を増すための
液・ガス熱交換器7を設け、過冷却度を上げると吸入ガ
スの過熱度が上り、吐出ガス温度が上るという不具合が
あった。Further, as shown in FIG. 5, when the liquid / gas heat exchanger 7 for increasing the cooling capacity is provided and the degree of supercooling is increased, the degree of superheat of the suction gas rises and the temperature of the discharge gas rises. ..
【0009】本発明は上記課題を解決した冷凍装置を提
供することを目的とする。An object of the present invention is to provide a refrigerating device which solves the above problems.
【0010】[0010]
【課題を解決するための手段】本発明は上記課題の解決
手段として、次の(1),(2)に記載の冷凍装置を提
供しようとするものである。 (1).圧縮機、水冷凝縮器、絞り機構、及び蒸発器よ
りなる冷凍装置において、前記蒸発器と圧縮機との間に
水・冷媒熱交換器を設け、同水・冷媒熱交換器に前記水
冷凝縮器出口側からの冷却水を冷媒の吸入温度に応じて
流す冷却水回路を設けたことを特徴とする冷凍装置。 (2).圧縮機、水冷凝縮器、絞り機構及び蒸発器より
なる冷凍装置において、前記蒸発器と圧縮機との間に第
1の水・冷媒熱交換器、前記水冷凝縮器と絞り機構との
間に第2の水・冷媒熱交換器をそれぞれ設け、前記第1
及び第2の水・冷媒熱交換器に対してその順に前記水冷
凝縮器出口側からの冷却水を冷媒の吐出温度に応じて流
す冷却水回路を設けたことを特徴とする冷凍装置。As a means for solving the above problems, the present invention is to provide a refrigerating apparatus described in the following (1) and (2). (1). In a refrigeration system including a compressor, a water-cooled condenser, a throttle mechanism, and an evaporator, a water / refrigerant heat exchanger is provided between the evaporator and the compressor, and the water-cooled condenser is attached to the water / refrigerant heat exchanger. A refrigeration system provided with a cooling water circuit for flowing cooling water from an outlet side in accordance with a suction temperature of a refrigerant. (2). In a refrigeration system including a compressor, a water-cooled condenser, a throttle mechanism and an evaporator, a first water / refrigerant heat exchanger is provided between the evaporator and the compressor, and a first water-refrigerant heat exchanger is provided between the water-cooled condenser and the throttle mechanism. Two water / refrigerant heat exchangers are provided, and the first
And a second water / refrigerant heat exchanger, in which a cooling water circuit is provided in which the cooling water from the outlet side of the water cooling condenser is caused to flow in accordance with the discharge temperature of the refrigerant.
【0011】[0011]
【作用】本発明は上記のように構成されるので次の作用
を有する。 (1).上記(1)の構成にあっては蒸発器の冷凍負荷
が減少すると、水冷媒熱交換器を流れる水量が増加し、
冷媒を加熱するため、吸入過熱度が増加して液冷媒の戻
りを防止する。 (2).上記(2)の構成にあっては蒸発器の冷凍負荷
が増加した場合には吐出温度が調節器に設定されている
設定温度を越えるため、制御弁が開弁の方向に働き、第
1、第2の水冷媒熱交換器を流れる水量が増加し、圧縮
機に吸込まれる冷媒蒸気の過熱度を減し、吐出ガス温度
が低下する。又、蒸発器の冷凍負荷が減少した場合には
吐出温度が調節器に設定されている設定温度より低くな
るため、制御弁が閉弁の方向に働き、第1、第2の水冷
媒熱交換器を流れる水量が減少し、圧縮機に吸込まれる
冷媒蒸気の過熱度が減る。Since the present invention is constructed as described above, it has the following actions. (1). In the configuration of (1) above, when the refrigeration load of the evaporator decreases, the amount of water flowing through the water-refrigerant heat exchanger increases,
Since the refrigerant is heated, the degree of superheat of suction is increased to prevent the liquid refrigerant from returning. (2). In the configuration of (2) above, when the refrigerating load of the evaporator increases, the discharge temperature exceeds the set temperature set in the controller, so the control valve works in the opening direction, The amount of water flowing through the second water-refrigerant heat exchanger increases, the superheat degree of the refrigerant vapor sucked into the compressor decreases, and the discharge gas temperature decreases. Further, when the refrigeration load of the evaporator is reduced, the discharge temperature becomes lower than the set temperature set in the controller, so that the control valve works toward the valve closing direction, and the first and second water-refrigerant heat exchanges are performed. The amount of water flowing through the vessel is reduced, and the degree of superheat of the refrigerant vapor drawn into the compressor is reduced.
【0012】一方、過冷却度はほぼ一定に保たれる。On the other hand, the degree of supercooling is kept substantially constant.
【0013】[0013]
【実施例】本発明の第1、第2実施例を図1〜図3によ
り説明する。なお、従来例ないしは先の実施例と同様の
構成部材には同符号を付し、必要ある場合を除き説明を
省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first and second embodiments of the present invention will be described with reference to FIGS. The same components as those in the conventional example or the previous example are designated by the same reference numerals, and the description thereof will be omitted unless necessary.
【0014】(第1実施例)第1実施例を図1により説
明する。(First Embodiment) A first embodiment will be described with reference to FIG.
【0015】図1は第1実施例に係る液もどり防止機構
付冷凍装置の図で、圧縮機1を出た高温高圧の冷媒は水
冷凝縮器2で冷却・液化され、絞り弁3で絞り込まれて
断熱膨張し、蒸発器4で吸熱し、圧縮機1に戻る。前記
圧縮機1の吸入側に冷媒・水熱交換器10を設け、蒸発
器4の冷凍負荷が減少したときに液冷媒の状態で戻ろう
とする未蒸発冷媒を加熱して蒸発させ、吸入過熱度を増
加するように、冷媒・水熱交換器10への水量を制御す
る制御弁11と圧縮機1の吸入側に吸入温度を検知する
温度センサ13と、前記吸入温度に応じて制御弁11を
調節する調節器12とを具備している。蒸発器4に対
し、冷凍負荷が減少した場合、吸入温度が調節器12の
設定温度よりも低くなるため、制御弁11が開く方向に
働き、冷媒・水熱交換器10を流れる水量が増加し、冷
媒の吸入過熱度が増加するように冷媒を加熱蒸発させ、
液もどりを防止する。又、冷媒・水熱交換器10を出た
水は冷却され、冷凍装置の冷却熱源は従来に比べて少な
くすむようになる。FIG. 1 is a diagram of a refrigerating apparatus with a liquid return prevention mechanism according to the first embodiment. The high temperature and high pressure refrigerant discharged from the compressor 1 is cooled and liquefied by a water cooling condenser 2 and is throttled by a throttle valve 3. Adiabatically expands, absorbs heat in the evaporator 4, and returns to the compressor 1. A refrigerant / water heat exchanger 10 is provided on the suction side of the compressor 1 to heat and evaporate the non-evaporated refrigerant that is about to return in a liquid refrigerant state when the refrigerating load of the evaporator 4 is reduced, and the suction superheat degree. Control valve 11 for controlling the amount of water to the refrigerant / water heat exchanger 10, a temperature sensor 13 for detecting the suction temperature on the suction side of the compressor 1, and a control valve 11 according to the suction temperature. The adjusting device 12 for adjusting is provided. When the refrigeration load on the evaporator 4 decreases, the suction temperature becomes lower than the set temperature of the controller 12, so the control valve 11 works in the opening direction, and the amount of water flowing through the refrigerant / water heat exchanger 10 increases. , Heating and evaporating the refrigerant so that the suction superheat of the refrigerant increases,
Prevents liquid from returning. Further, the water discharged from the refrigerant / water heat exchanger 10 is cooled, and the cooling heat source of the refrigerating apparatus can be reduced as compared with the conventional case.
【0016】(第2実施例)第2実施例を図2及び図3
により説明する。(Second Embodiment) Second Embodiment FIGS. 2 and 3
Will be explained.
【0017】図2は第2実施例に係る、液・ガス熱交換
器付冷凍装置の図で、図においては14bは水冷凝縮器
2と絞り弁3との間に介装された冷媒・水熱交換器、1
4aは蒸発器4と圧縮機1との間に介装された冷媒・水
熱交換器、15は制御弁、16は吐出温度センサ、17
は調節器である。FIG. 2 is a view of a refrigerating apparatus with a liquid / gas heat exchanger according to a second embodiment, in which 14b is a refrigerant / water interposed between a water-cooled condenser 2 and a throttle valve 3. Heat exchanger, 1
4 a is a refrigerant / water heat exchanger interposed between the evaporator 4 and the compressor 1, 15 is a control valve, 16 is a discharge temperature sensor, 17
Is a regulator.
【0018】前記圧縮機1を出た高温高圧の冷媒は水ポ
ンプ6にて汲み上げられた水で冷却される水冷凝縮器2
で冷却液化され、レシーバ5を介して冷媒・水熱交換器
14bに入り、ここで、水ポンプ6にて汲み上げられた
水は冷媒・水熱交換器14aで得られた熱を吸熱し、絞
り弁3で絞られ、断熱膨張し、蒸発器4で吸熱し、該蒸
発器4を出た低温の冷媒蒸気と水冷凝縮器2を出た高温
の水の一部は圧縮機1の吐出管に配設した吐出温度セン
サ16による吐出温度を検知し、制御弁15の開弁状態
を調節器17に設定されている温度よりも低くなると制
御弁15が開弁方向に働き、冷媒・水熱交換器14aで
熱交換して、次の冷媒・水熱交換器14bで吸熱して圧
縮機1に戻る。The high-temperature, high-pressure refrigerant leaving the compressor 1 is cooled by the water pumped by the water pump 6, which is a water-cooled condenser 2.
Is liquefied by the coolant and enters the refrigerant / water heat exchanger 14b via the receiver 5, where the water pumped up by the water pump 6 absorbs the heat obtained in the refrigerant / water heat exchanger 14a, and squeezes it. A part of the low-temperature refrigerant vapor discharged from the evaporator 4 and the high-temperature water discharged from the water-cooled condenser 2 are discharged to the discharge pipe of the compressor 1 after being throttled by the valve 3 and adiabatically expanded. The discharge temperature sensor 16 provided detects the discharge temperature, and when the valve open state of the control valve 15 becomes lower than the temperature set in the regulator 17, the control valve 15 works in the valve opening direction to exchange heat between the refrigerant and water. The heat is exchanged in the vessel 14a, the heat is absorbed in the next refrigerant / water heat exchanger 14b, and the heat is returned to the compressor 1.
【0019】蒸発器4の冷却負荷が増加した場合には吐
出温度が調節器17の設定温度を越えるため制御弁15
が開方向に働き、冷媒・水熱交換器14aを流れる水量
が増加し、圧縮機1に吸込まれる冷媒蒸気の過熱度が減
り、吐出ガス温度が従来に比べ低下する。又、蒸発器4
の冷凍負荷が減少した場合には吐出温度が調節器17の
設定温度よりも低くなるため、制御弁15が閉じる方向
に働き、冷媒・水熱交換器14a,14bを流れる水量
が減少し、液もどりの防止と冷凍能力の増大が果たされ
る。When the cooling load of the evaporator 4 increases, the discharge temperature exceeds the set temperature of the controller 17, so the control valve 15
Operates in the opening direction, the amount of water flowing through the refrigerant / water heat exchanger 14a increases, the degree of superheat of the refrigerant vapor sucked into the compressor 1 decreases, and the discharge gas temperature becomes lower than in the conventional case. Also, the evaporator 4
When the refrigerating load is reduced, the discharge temperature becomes lower than the set temperature of the controller 17, so that the control valve 15 works toward the closing direction, the amount of water flowing through the refrigerant / water heat exchangers 14a and 14b decreases, and Prevention of backlash and increase of refrigeration capacity are achieved.
【0020】図3は因みに示した、圧縮機1の吐出ガス
温度の設定温度に対する上記制御弁15の開閉状態を定
性的に示した線図である。FIG. 3 is a diagram qualitatively showing the open / closed state of the control valve 15 with respect to the set temperature of the discharge gas temperature of the compressor 1 shown in FIG.
【0021】[0021]
【発明の効果】本発明は上記のように構成されるので次
の効果を有する。Since the present invention is constructed as described above, it has the following effects.
【0022】即ち、請求項1の発明にあっては蒸発器に
対し、冷凍負荷が減少した場合には水冷媒熱交換器によ
り冷媒の吸入過熱度が増加するよう冷媒を加熱蒸発さ
せ、液もどりを防止することができる。又、冷凍装置の
冷却熱源は従来に比べて少なくてすみ省エネルギが計れ
る。That is, in the invention of claim 1, when the refrigerating load is reduced, the water refrigerant heat exchanger heats and evaporates the refrigerant so that the suction superheat degree of the refrigerant increases, and the liquid returns. Can be prevented. Further, the cooling heat source of the refrigerating apparatus is smaller than that of the conventional one, and energy saving can be achieved.
【0023】また、請求項2の発明にあっては蒸発器の
冷凍負荷が増加すると制御弁は開弁し、第1,第2の水
冷媒熱交換器を流れる水量が増加し、冷媒蒸気の過熱度
が減少するため、吐出ガス温度の低下が計れる。又、蒸
発器の冷凍負荷が減少すると制御弁は閉弁し、第1、第
2の冷媒熱交換器を流れる水量が減少し、冷媒蒸気の過
熱度および過冷却度が従来に比べ良好になるので液もど
り防止と冷凍能力の増大が計れる。Further, in the invention of claim 2, when the refrigerating load of the evaporator increases, the control valve opens, the amount of water flowing through the first and second water-refrigerant heat exchangers increases, and the refrigerant vapor Since the superheat degree decreases, the discharge gas temperature can be lowered. Also, when the refrigeration load of the evaporator decreases, the control valve closes, the amount of water flowing through the first and second refrigerant heat exchangers decreases, and the degree of superheat and supercooling of the refrigerant vapor becomes better than before. Therefore, it is possible to prevent the liquid from returning and increase the refrigerating capacity.
【図1】本発明の第1実施例の冷媒系統図、FIG. 1 is a refrigerant system diagram of a first embodiment of the present invention,
【図2】本発明の第2実施例の冷媒系統図、FIG. 2 is a refrigerant system diagram of a second embodiment of the present invention,
【図3】第2実施例の吐出ガス温度に対する制御弁開度
の関係線図、FIG. 3 is a relational diagram of the control valve opening with respect to the discharge gas temperature in the second embodiment,
【図4】従来例の冷媒系統図、FIG. 4 is a refrigerant system diagram of a conventional example,
【図5】別の従来例の冷媒系統図、FIG. 5 is a refrigerant system diagram of another conventional example,
【図6】図5に示す従来例のモリエル線図である。FIG. 6 is a Mollier diagram of the conventional example shown in FIG.
1 圧縮機 2 水冷凝縮器 3 絞り弁 4 蒸発器 5 レシーバ 6 水ポンプ 10 冷媒・水熱交換器 11 制御弁 12 調節器 13 吸入温度センサ 14a 冷媒・水熱交換器(第1の水・冷媒熱交換器) 14b 冷媒・水熱交換器(第2の水・冷媒熱交換器) 15 制御弁 16 吐出温度センサ 17 調節器 1 Compressor 2 Water Cooling Condenser 3 Throttle Valve 4 Evaporator 5 Receiver 6 Water Pump 10 Refrigerant / Water Heat Exchanger 11 Control Valve 12 Regulator 13 Intake Temperature Sensor 14a Refrigerant / Water Heat Exchanger (First Water / Refrigerant Heat) Exchanger) 14b Refrigerant / water heat exchanger (second water / refrigerant heat exchanger) 15 Control valve 16 Discharge temperature sensor 17 Regulator
Claims (2)
発器よりなる冷凍装置において、前記蒸発器と圧縮機と
の間に水・冷媒熱交換器を設け、同水・冷媒熱交換器に
前記水冷凝縮器出口側からの冷却水を冷媒の吸入温度に
応じて流す冷却水回路を設けたことを特徴とする冷凍装
置。1. A refrigeration apparatus comprising a compressor, a water-cooled condenser, a throttle mechanism, and an evaporator, wherein a water / refrigerant heat exchanger is provided between the evaporator and the compressor, and the water / refrigerant heat exchanger is provided. A refrigerating apparatus comprising: a cooling water circuit for flowing cooling water from the outlet side of the water-cooled condenser in accordance with a suction temperature of a refrigerant.
器よりなる冷凍装置において、前記蒸発器と圧縮機との
間に第1の水・冷媒熱交換器、前記水冷凝縮器と絞り機
構との間に第2の水・冷媒熱交換器をそれぞれ設け、前
記第1及び第2の水・冷媒熱交換器に対してその順に前
記水冷凝縮器出口側からの冷却水を冷媒の吐出温度に応
じて流す冷却水回路を設けたことを特徴とする冷凍装
置。2. A refrigeration system comprising a compressor, a water-cooled condenser, a throttle mechanism and an evaporator, wherein a first water / refrigerant heat exchanger, the water-cooled condenser and the throttle mechanism are provided between the evaporator and the compressor. And a second water / refrigerant heat exchanger, respectively, between the first and second water / refrigerant heat exchangers, in that order, the cooling water from the outlet side of the water-cooled condenser is discharged into the refrigerant. A refrigeration system provided with a cooling water circuit that flows in accordance with the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6018592A JPH05264108A (en) | 1992-03-17 | 1992-03-17 | Refrigeration device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6018592A JPH05264108A (en) | 1992-03-17 | 1992-03-17 | Refrigeration device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05264108A true JPH05264108A (en) | 1993-10-12 |
Family
ID=13134856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6018592A Withdrawn JPH05264108A (en) | 1992-03-17 | 1992-03-17 | Refrigeration device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05264108A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007071457A (en) * | 2005-09-07 | 2007-03-22 | Ishikawajima Inspection & Instrumentation Co | Air conditioning device for environmental test |
KR100862021B1 (en) * | 2008-07-02 | 2008-10-08 | 이형문 | Energy saving type hot water boiler |
JP2010008042A (en) * | 2009-10-14 | 2010-01-14 | Panasonic Corp | Refrigerating cycle device and control method |
WO2011096059A1 (en) * | 2010-02-04 | 2011-08-11 | 株式会社前川製作所 | Heat pump and method for operating heat pump |
KR101361853B1 (en) * | 2012-07-10 | 2014-02-11 | (주)그린이엔티 | Water heat utilizing apparatus of air heat source heat pump using water heat source by secondary heat source |
JP2017194180A (en) * | 2016-04-18 | 2017-10-26 | 株式会社デンソー | Refrigeration cycle device |
-
1992
- 1992-03-17 JP JP6018592A patent/JPH05264108A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007071457A (en) * | 2005-09-07 | 2007-03-22 | Ishikawajima Inspection & Instrumentation Co | Air conditioning device for environmental test |
KR100862021B1 (en) * | 2008-07-02 | 2008-10-08 | 이형문 | Energy saving type hot water boiler |
JP2010008042A (en) * | 2009-10-14 | 2010-01-14 | Panasonic Corp | Refrigerating cycle device and control method |
WO2011096059A1 (en) * | 2010-02-04 | 2011-08-11 | 株式会社前川製作所 | Heat pump and method for operating heat pump |
KR101361853B1 (en) * | 2012-07-10 | 2014-02-11 | (주)그린이엔티 | Water heat utilizing apparatus of air heat source heat pump using water heat source by secondary heat source |
JP2017194180A (en) * | 2016-04-18 | 2017-10-26 | 株式会社デンソー | Refrigeration cycle device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990518 |