JPH0914801A - Frosting preventive device in engine waste heat recovering type gas engine driving heat pump - Google Patents
Frosting preventive device in engine waste heat recovering type gas engine driving heat pumpInfo
- Publication number
- JPH0914801A JPH0914801A JP7165761A JP16576195A JPH0914801A JP H0914801 A JPH0914801 A JP H0914801A JP 7165761 A JP7165761 A JP 7165761A JP 16576195 A JP16576195 A JP 16576195A JP H0914801 A JPH0914801 A JP H0914801A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- waste heat
- gas engine
- frost
- cooling water
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガスエンジンによりコ
ンプレッサーを駆動して冷房及び暖房サイクルを運転す
ると共に、前記ガスエンジンの廃熱（冷却水）を給湯等
に利用するエンジン廃熱回収型ガスエンジン駆動ヒート
ポンプにおける着霜防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine waste heat recovery type gas for driving a compressor by a gas engine to operate a cooling and heating cycle and utilizing waste heat (cooling water) of the gas engine for hot water supply and the like. The present invention relates to a frost prevention device for an engine-driven heat pump.
【０００２】[0002]
【従来の技術】図２は従来のエンジン廃熱回収型ガスエ
ンジン駆動ヒートポンプの説明図であって、１はガスエ
ンジン、２はガスエンジン１の冷却水が循環する冷却水
回路である。３は冷却水回路２に取り付けられた廃熱回
収器、４は給湯加熱・温水暖房等に利用される廃熱回収
ライン、５は冷媒加熱器、６は暖房サイクルライン、７
は蒸発器、８は室外熱交換器、８ａはファン、９はラジ
ェータ、９ａはファン、１０は冷却水循環ポンプ、１１
はラジェータ９をバイパスするバイパスライン、１２は
バイパスライン１１の分岐部に取り付けられた切換弁付
のサーモスタットであって、このサーモスタット１２は
冷却水の温度が低い場合には前記ラジェータ９をバイパ
スさせる。上記従来のヒートポンプは、ガスエンジン１
によりコンプレッサーを駆動して冷房及び暖房サイクル
を運転するものであって、冷媒加熱器５は、暖房サイク
ルに際して冷媒の蒸発器として機能する。2. Description of the Related Art FIG. 2 is an explanatory view of a conventional engine waste heat recovery type gas engine driven heat pump, wherein 1 is a gas engine and 2 is a cooling water circuit in which cooling water of the gas engine 1 circulates. 3 is a waste heat recovery unit attached to the cooling water circuit 2, 4 is a waste heat recovery line used for heating hot water, heating hot water, etc., 5 is a refrigerant heater, 6 is a heating cycle line, 7
Is an evaporator, 8 is an outdoor heat exchanger, 8a is a fan, 9 is a radiator, 9a is a fan, 10 is a cooling water circulation pump, 11
Is a bypass line for bypassing the radiator 9, 12 is a thermostat with a switching valve attached to the branch portion of the bypass line 11, and this thermostat 12 bypasses the radiator 9 when the temperature of the cooling water is low. The conventional heat pump is the gas engine 1
The compressor drives the compressor to drive the cooling and heating cycles, and the refrigerant heater 5 functions as an evaporator of the refrigerant during the heating cycle.
【０００３】[0003]
【発明が解決しようとする課題】上記ヒートポンプにお
いて、給湯及び暖房負荷が増大して廃熱回収器３での吸
熱が進行したり、或いはヒートポンプ運転において暖房
負荷が増大した場合、冷媒加熱器５の蒸発能力が小さく
なることから、室外熱交換器８に着霜することがある。
そして、この着霜が生じると、暖房能力が低下する。In the above heat pump, when the hot water supply and the heating load increase and the heat absorption in the waste heat recovery unit 3 progresses, or the heating load increases during the heat pump operation, the refrigerant heater 5 is heated. Since the evaporation capacity becomes small, the outdoor heat exchanger 8 may be frosted.
And if this frost forms, heating capacity will fall.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するのが目的であって、その構成は次のとおりであ
る。 １．ガスエンジンの冷却水回路を廃熱回収器及び冷媒加
熱器及びラジェータの順に循環させて、ガスエンジンの
廃熱を回収するエンジン廃熱回収型ガスエンジン駆動ヒ
ートポンプにおいて、前記冷却水回路に廃熱回収器をバ
イパスする着霜防止バイパスラインを取り付けたこと、
前記冷却水回路と着霜防止バイパスラインの分岐部に三
方弁を取り付けたこと、前記冷媒加熱器内を循環する冷
媒圧力を検知してこの圧力が一定値以下に低下したとき
に前記三方弁を着霜防止バイパスライン側に切り換えて
室外熱交換器に着霜するのを防止するための着霜防止回
路を設けたこと、を特徴とするエンジン廃熱回収型ガス
エンジン駆動ヒートポンプにおける着霜防止装置。 ２．冷媒加熱器内に冷媒蒸発温度センサを取り付けて循
環する冷媒の蒸発温度を検知し、この冷媒蒸発温度が一
定値以下に低下したときに着霜防止回路が三方弁をバイ
パスライン側に切り換えるように構成して成る前記１記
載のエンジン廃熱回収型ガスエンジン駆動ヒートポンプ
における着霜防止装置。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and the constitution is as follows. 1. In an engine waste heat recovery type gas engine drive heat pump that recovers the waste heat of the gas engine by circulating the cooling water circuit of the gas engine in the order of the waste heat recovery device, the refrigerant heater, and the radiator, the waste heat recovery is performed in the cooling water circuit. I installed a frost prevention bypass line to bypass the device,
A three-way valve is attached to the branch portion of the cooling water circuit and the frost prevention bypass line, and the three-way valve is detected when the pressure of the refrigerant circulating in the refrigerant heater is detected and the pressure drops below a certain value. A frost prevention device for an engine waste heat recovery type gas engine driven heat pump, characterized in that a frost prevention circuit is provided for switching to the frost prevention bypass line side to prevent frost formation on the outdoor heat exchanger. . 2. A refrigerant evaporation temperature sensor is installed in the refrigerant heater to detect the evaporation temperature of the circulating refrigerant, and when the refrigerant evaporation temperature falls below a certain value, the frost prevention circuit switches the three-way valve to the bypass line side. The frost prevention device in the engine waste heat recovery type gas engine drive heat pump according to the above 1, which is configured.
【０００５】[0005]
【作用】冷房を行う場合、ガスエンジンによりコンプレ
ッサーを駆動すると、圧縮された冷媒は四方弁から冷媒
回路を経由して室外熱交換器で放熱を行い、次に膨張弁
を経由して蒸発器に至り、ここで蒸発してブライン又は
室内空気から直接熱を奪って冷房を行う。次に暖房を行
う場合には、ガスエンジンによりコンプレッサーを駆動
すると、圧縮された冷媒は四方弁から冷媒回路を逆流す
るかたちで、室内熱交換器内に至り、ここで凝縮して、
熱を室内空気に放出して暖房を行う。この冷・暖房サイ
クルにおいて、ガスエンジンの冷却水は、冷却水回路を
経由して廃熱回収器に至り、ここで給湯加熱・温水暖房
補助加熱を行い、次に冷媒加熱器に至り、ここで暖房サ
イクル側の冷媒を加熱して蒸発させ、ラジェータを経由
して、又はラジェータを経由せずに冷却水循環ポンプを
経由してガスエンジンに戻る。上記運転において、暖房
運転の場合、冷媒加熱器内においては、冷媒の蒸発が行
われており、この冷媒の圧力又は蒸発温度は圧力センサ
又は温度センサで検知され、この値が着霜防止回路に入
力される。着霜防止回路は、入力される圧力又は温度を
監視し、この値が設定値を超えた場合、三方弁に信号を
送ってこの三方弁をバイパス回路側に切り換えてガスエ
ンジンから出た冷却水を三方弁→着霜防止バイパス回路
→冷媒熱交換器と流し、廃熱回収器を経由させない。こ
の結果、ガスエンジンから出た高温例えば８０℃〜８５
℃の冷却水は、直接冷媒加熱器に供給されるため、冷媒
の蒸発が促進され、よって、室外熱交換器の着霜が防止
される。そして、冷媒加熱器内の冷媒圧力又は冷媒蒸発
温度が所定の圧力又は温度に回復すると、着霜防止回路
は、三方弁を着霜防止バイパス回路側から廃熱回収器側
に切り換えて給湯加熱・暖房温水補助加熱を行う。な
お、暖房を優先する場合には、前記冷媒圧力又は冷媒蒸
気温度とは関係なしに、三方弁を廃熱回収器側に固定す
る。[Operation] When the compressor is driven by the gas engine during cooling, the compressed refrigerant radiates heat from the four-way valve through the refrigerant circuit to the outdoor heat exchanger, and then through the expansion valve to the evaporator. Then, it evaporates here, and heat is taken directly from the brine or indoor air to perform cooling. When heating is performed next, when the compressor is driven by the gas engine, the compressed refrigerant flows back through the refrigerant circuit from the four-way valve, reaches the inside of the indoor heat exchanger, and is condensed there.
Dissipates heat to indoor air for heating. In this cooling / heating cycle, the cooling water of the gas engine reaches the waste heat recovery device via the cooling water circuit, where hot water heating / hot water heating auxiliary heating is performed, and then to the refrigerant heater, where The refrigerant on the heating cycle side is heated and evaporated, and then returns to the gas engine via the radiator or via the cooling water circulation pump without passing through the radiator. In the above operation, in the case of heating operation, the refrigerant is evaporated in the refrigerant heater, and the pressure or evaporation temperature of this refrigerant is detected by the pressure sensor or the temperature sensor, and this value is stored in the frost prevention circuit. Is entered. The frost prevention circuit monitors the input pressure or temperature, and when this value exceeds the set value, it sends a signal to the three-way valve to switch the three-way valve to the bypass circuit side and the cooling water that comes out of the gas engine. Flow from the three-way valve to the frost prevention bypass circuit to the refrigerant heat exchanger without passing through the waste heat recovery unit. As a result, the high temperature emitted from the gas engine, for example, 80 ° C to 85 ° C.
Since the cooling water of ° C is directly supplied to the refrigerant heater, evaporation of the refrigerant is promoted, and thus frost formation on the outdoor heat exchanger is prevented. Then, when the refrigerant pressure or refrigerant evaporation temperature in the refrigerant heater is restored to a predetermined pressure or temperature, the frost prevention circuit switches the three-way valve from the frost prevention bypass circuit side to the waste heat recovery device side to heat the hot water. Heating Hot water auxiliary heating is performed. When the heating is prioritized, the three-way valve is fixed to the waste heat recovery device side regardless of the refrigerant pressure or the refrigerant vapor temperature.
【０００６】[0006]
【実施例】図１に基づいて本発明の実施例を詳述する。
符号の１はガスエンジンであって、ヒートポンプサイク
ルの運転は、このガスエンジン１により行われる。２は
前記ガスエンジン１の冷却水回路（廃熱回収回路）、３
は冷却水回路２に取り付けられた廃熱回収器であって、
この廃熱回収器３により、高温の冷却水が持つ熱エネル
ギーを廃熱回収ライン４で回収し、この回収した熱エネ
ルギーを給湯或いは暖房用に利用する。５は冷却水回路
２に取り付けられた冷媒加熱器であって、この冷媒加熱
器５は、ヒートポンプにおける暖房ライン６の蒸発器７
に熱を与えて、冷媒を蒸発させる。８は室外熱交換器、
８ａはファンである。なお、暖房ライン６において、６
ａはコンプレッサー、６ｂは四方弁、６ｃは室内熱交換
器、６ｄはファン、６ｅは膨張弁である。９は冷却水回
路２に取り付けられたファン９ａ付のラジェータであっ
て、冷却水温が高い場合に、このラジェータ９側を冷却
水が通過してファン９ａにより空冷され、冷却水循環ポ
ンプ１０を経由してガスエンジン１に戻る。１１は前記
ラジエータ９をバイパスするバイパスラインであって、
分岐部に切換弁付のサーモスタット１２が取り付けられ
ており、冷却水の温度をこのサーモスタット１２で検知
し、前記廃熱回収及び冷媒加熱時の負荷が大きくて冷却
水の温度が一定温度以下に低下している場合には、ラジ
ェータ９を通過させずにバイパスライン１１からガスエ
ンジン１に戻す。１３はガスエンジン１の吐出側（廃熱
回収器３との間）を分岐し、廃熱回収器３とガスエンジ
ン１間を結ぶ着霜防止バイパスラインであって、この分
岐部には三方弁１４が取り付けられている。１５は着霜
防止回路であって、この着霜防止回路１５は、冷媒加熱
器５に組み込まれた蒸発器７内冷媒圧力又は蒸発温度を
圧力センサ（又は温度センサ）１６で検知し、圧力又は
温度が規定以下になった場合に、前記三方弁１４を着霜
防止バイパスライン１３側に切り換えて廃熱回収器３で
の廃熱回収を行わずに直接高温冷却水を冷媒加熱器５に
供給して蒸発器７を加熱することにより、冷媒圧力又は
冷媒蒸気温度を上昇させて室外熱交換器８に着霜するの
を防止し、加えて冷媒圧力又は冷媒蒸気の温度が規定以
上に上昇した場合には三方弁１４を元に戻して廃熱回収
器３側を通過させる運転制御を行う。なお、上記着霜防
止回路１５は、暖房を優先する場合にも三方弁１４を着
霜防止バイパスライン１３側に切り換えてヒートポンプ
の暖房運転を優先させる制御を任意に行うこともでき
る。１７は通信線である。Embodiments of the present invention will be described in detail with reference to FIG.
Reference numeral 1 is a gas engine, and the operation of the heat pump cycle is performed by the gas engine 1. 2 is a cooling water circuit of the gas engine 1 (waste heat recovery circuit), 3
Is a waste heat recovery device attached to the cooling water circuit 2,
The waste heat recovery device 3 recovers the heat energy of the high-temperature cooling water in the waste heat recovery line 4 and uses the recovered heat energy for hot water supply or heating. Reference numeral 5 is a refrigerant heater attached to the cooling water circuit 2, and this refrigerant heater 5 is an evaporator 7 of the heating line 6 in the heat pump.
Heat is applied to the refrigerant to evaporate the refrigerant. 8 is an outdoor heat exchanger,
8a is a fan. In the heating line 6, 6
a is a compressor, 6b is a four-way valve, 6c is an indoor heat exchanger, 6d is a fan, and 6e is an expansion valve. Reference numeral 9 denotes a radiator with a fan 9a attached to the cooling water circuit 2. When the cooling water temperature is high, the cooling water passes through the radiator 9 side and is air-cooled by the fan 9a. Return to gas engine 1. Reference numeral 11 denotes a bypass line that bypasses the radiator 9,
A thermostat 12 with a switching valve is attached to the branch part, and the temperature of the cooling water is detected by this thermostat 12, and the temperature of the cooling water drops below a certain temperature due to the large load at the time of waste heat recovery and refrigerant heating. If it is, the bypass line 11 is returned to the gas engine 1 without passing the radiator 9. Reference numeral 13 denotes a frost prevention bypass line that branches the discharge side of the gas engine 1 (between the waste heat recovery device 3) and connects the waste heat recovery device 3 and the gas engine 1, and a three-way valve is provided at this branch part. 14 is attached. Reference numeral 15 denotes a frost prevention circuit. This frost prevention circuit 15 detects the refrigerant pressure or evaporation temperature in the evaporator 7 incorporated in the refrigerant heater 5 with a pressure sensor (or temperature sensor) 16, and detects the pressure or When the temperature becomes lower than the specified value, the three-way valve 14 is switched to the frost prevention bypass line 13 side to directly supply the high temperature cooling water to the refrigerant heater 5 without performing waste heat recovery in the waste heat recovery device 3. Then, by heating the evaporator 7, the refrigerant pressure or the refrigerant vapor temperature is raised to prevent the frost formation on the outdoor heat exchanger 8, and in addition, the refrigerant pressure or the refrigerant vapor temperature rises above the regulation. In this case, the operation control is performed such that the three-way valve 14 is returned to the original position and the waste heat recovery device 3 is passed. Note that the frost prevention circuit 15 can optionally perform control to switch the three-way valve 14 to the frost prevention bypass line 13 side to give priority to the heating operation of the heat pump even when giving priority to heating. Reference numeral 17 is a communication line.
【０００７】[0007]
【発明の効果】本発明は以上のように、ヒートポンプに
おいて、暖房サイクル運転中、この暖房サイクル側の負
荷が増大した場合或いは（及び）廃熱回収器側の負荷が
増大して冷媒加熱器における冷媒圧力又は冷媒蒸気温度
が規定値以下（着霜危険域）になった場合に、廃熱回収
器をバイパスさせて冷却水を直接冷媒加熱器側に供給す
るため、室外熱交換器の着霜を未然に防止して、暖房運
転を効率よく行うことができる。As described above, according to the present invention, in the heat pump, when the load on the heating cycle side is increased during the heating cycle operation or / and the load on the waste heat recovery side is increased, the refrigerant heater When the refrigerant pressure or refrigerant vapor temperature falls below the specified value (frost danger zone), the waste heat recovery device is bypassed and cooling water is supplied directly to the refrigerant heater side, so frost formation on the outdoor heat exchanger It is possible to efficiently perform the heating operation by preventing the above.
【図１】本発明の実施例の説明図。FIG. 1 is an explanatory diagram of an embodiment of the present invention.
【図２】従来のエンジン廃熱回収型ガスエンジン駆動ヒ
ートポンプの説明図。FIG. 2 is an explanatory view of a conventional engine waste heat recovery type gas engine drive heat pump.
１ ガスエンジン ２ 冷却水回路（廃熱回収回路） ３ 廃熱回収器 ４ 廃熱回収ライン ５ 冷媒加熱器 ６ 暖房ライン ７ 蒸発器 ８ 室外熱交換器 ８ａ ファン ９ ラジェータ ９ａ ファン １０ 冷却水循環ポンプ １１ バイパスライン １２ サーモスタット １３ 着霜防止バイパスライン １４ 三方弁 １５ 着霜防止回路 １６ センサ １７ 通信線 1 Gas Engine 2 Cooling Water Circuit (Waste Heat Recovery Circuit) 3 Waste Heat Recovery Device 4 Waste Heat Recovery Line 5 Refrigerant Heater 6 Heating Line 7 Evaporator 8 Outdoor Heat Exchanger 8a Fan 9 Radiator 9a Fan 10 Cooling Water Circulation Pump 11 Bypass Line 12 Thermostat 13 Frost prevention bypass line 14 Three-way valve 15 Frost prevention circuit 16 Sensor 17 Communication line
Claims (2)
及び冷媒加熱器及びラジェータの順に循環させて、ガス
エンジンの廃熱を回収するエンジン廃熱回収型ガスエン
ジン駆動ヒートポンプにおいて、 前記冷却水回路に廃熱回収器をバイパスする着霜防止バ
イパスラインを取り付けたこと、 前記冷却水回路と着霜防止バイパスラインの分岐部に三
方弁を取り付けたこと、 前記冷媒加熱器内を循環する冷媒圧力を検知してこの圧
力が一定値以下に低下したときに前記三方弁を着霜防止
バイパスライン側に切り換えて室外熱交換器に着霜する
のを防止するための着霜防止回路を設けたこと、 を特徴とするエンジン廃熱回収型ガスエンジン駆動ヒー
トポンプにおける着霜防止装置。1. An engine waste heat recovery type gas engine driven heat pump for recovering waste heat of a gas engine by circulating a cooling water circuit of the gas engine in the order of a waste heat recovery device, a refrigerant heater and a radiator, wherein the cooling water is used. A frost prevention bypass line that bypasses the waste heat recovery device is attached to the circuit, a three-way valve is attached to the branch portion of the cooling water circuit and the frost prevention bypass line, and a refrigerant pressure that circulates in the refrigerant heater. And a frost-prevention circuit for preventing the frost formation on the outdoor heat exchanger by switching the three-way valve to the frost-prevention bypass line side when the pressure drops below a certain value. A frost prevention device for a heat pump for recovering heat from a gas engine driven by an engine.
り付けて循環する冷媒の蒸発温度を検知し、この冷媒蒸
発温度が一定値以下に低下したときに着霜防止回路が三
方弁をバイパスライン側に切り換えるように構成して成
る請求項１記載のエンジン廃熱回収型ガスエンジン駆動
ヒートポンプにおける着霜防止装置。2. A refrigerant evaporation temperature sensor is installed in the refrigerant heater to detect the evaporation temperature of the circulating refrigerant, and when the refrigerant evaporation temperature falls below a certain value, the frost prevention circuit bypasses the three-way valve. The frost prevention apparatus in an engine waste heat recovery type gas engine driven heat pump according to claim 1, wherein the frost prevention apparatus is configured to be switched to the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16576195A JP3410583B2 (en) | 1995-06-30 | 1995-06-30 | Defrost prevention device for gas engine driven heat pump with engine waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16576195A JP3410583B2 (en) | 1995-06-30 | 1995-06-30 | Defrost prevention device for gas engine driven heat pump with engine waste heat recovery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0914801A true JPH0914801A (en) | 1997-01-17 |
| JP3410583B2 JP3410583B2 (en) | 2003-05-26 |
Family
ID=15818549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16576195A Expired - Fee Related JP3410583B2 (en) | 1995-06-30 | 1995-06-30 | Defrost prevention device for gas engine driven heat pump with engine waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3410583B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100658909B1 (en) * | 2005-07-29 | 2006-12-15 | 엘에스전선 주식회사 | Apparatus and method for engine starting improvement in cold weather of the ghp air handling unit |
| CN100434836C (en) * | 2005-03-29 | 2008-11-19 | 爱信精机株式会社 | Water cooling type engine heat pump |
| JP2008286476A (en) * | 2007-05-17 | 2008-11-27 | Osaka Gas Co Ltd | Engine-driven heat pump device |
| JP2011220680A (en) * | 2011-08-12 | 2011-11-04 | Sanyo Electric Co Ltd | Air conditioner |
| WO2012161447A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| WO2012161446A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| JP2014219169A (en) * | 2013-05-10 | 2014-11-20 | 本田技研工業株式会社 | Cogeneration device |
| KR101714900B1 (en) * | 2015-09-30 | 2017-03-09 | 엘지전자 주식회사 | A gas heat-pump system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434836C (en) * | 2005-03-29 | 2008-11-19 | 爱信精机株式会社 | Water cooling type engine heat pump |
| KR100658909B1 (en) * | 2005-07-29 | 2006-12-15 | 엘에스전선 주식회사 | Apparatus and method for engine starting improvement in cold weather of the ghp air handling unit |
| JP2008286476A (en) * | 2007-05-17 | 2008-11-27 | Osaka Gas Co Ltd | Engine-driven heat pump device |
| WO2012161446A3 (en) * | 2011-05-23 | 2013-03-21 | Jin Ju-Hwan | Heat pump system |
| WO2012161447A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| WO2012161457A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| WO2012161446A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| WO2012161456A2 (en) * | 2011-05-23 | 2012-11-29 | Jin Ju-Hwan | Heat pump system |
| WO2012161457A3 (en) * | 2011-05-23 | 2013-01-17 | Jin Ju-Hwan | Heat pump system |
| WO2012161456A3 (en) * | 2011-05-23 | 2013-03-21 | Jin Ju-Hwan | Heat pump system |
| WO2012161447A3 (en) * | 2011-05-23 | 2013-03-21 | Jin Ju-Hwan | Heat pump system |
| JP2011220680A (en) * | 2011-08-12 | 2011-11-04 | Sanyo Electric Co Ltd | Air conditioner |
| JP2014219169A (en) * | 2013-05-10 | 2014-11-20 | 本田技研工業株式会社 | Cogeneration device |
| KR101714900B1 (en) * | 2015-09-30 | 2017-03-09 | 엘지전자 주식회사 | A gas heat-pump system |
| US10352593B2 (en) | 2015-09-30 | 2019-07-16 | Lg Electronics Inc. | Gas heat-pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3410583B2 (en) | 2003-05-26 |
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| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |