JP2925570B2 - Air conditioning - Google Patents
Air conditioningInfo
- Publication number
- JP2925570B2 JP2925570B2 JP1081115A JP8111589A JP2925570B2 JP 2925570 B2 JP2925570 B2 JP 2925570B2 JP 1081115 A JP1081115 A JP 1081115A JP 8111589 A JP8111589 A JP 8111589A JP 2925570 B2 JP2925570 B2 JP 2925570B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- outdoor
- temperature
- auxiliary heat
- cooling
- 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 - Lifetime
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は室内を冷暖房するヒートポンプ式の冷暖房装
置に関する。The present invention relates to a heat pump type cooling / heating device for cooling / heating a room.
（ロ）従来の技術 暖房運転時や除霜運転時に室外熱交換器で生じたドレ
ン水が室外熱交換器の下部で氷結するのを防止するため
に、過冷却用の室外補助熱交換器を室外熱交換器の下部
に設けた冷暖房装置が特公昭57−31059号公報で提示さ
れている。(B) Conventional technology In order to prevent drain water generated in the outdoor heat exchanger from freezing at the lower part of the outdoor heat exchanger during heating operation or defrosting operation, an outdoor auxiliary heat exchanger for supercooling is installed. A cooling and heating device provided below an outdoor heat exchanger is disclosed in Japanese Patent Publication No. 57-31059.
（ハ）発明が解決しようとする課題 上記公報で提示の装置では暖房運転時に室内熱交換器
で凝縮した高圧液冷媒を室内キャピラリーチューブで一
次減圧して中間圧力にした後、室外補助熱交換器で過冷
却させることにより、暖房能力の低下を少なく抑えなが
ら室外補助熱交換器からの放熱で室外熱交換器の下部の
氷結を防止している。しかしながら、氷結は外気温度に
よって左右するものであり、上記の装置では外気温度が
高く氷結しない時でも室外補助熱交換器から放熱される
ため、その放熱分だけ暖房能力が低下する不具合さがあ
った。(C) Problems to be Solved by the Invention In the device disclosed in the above-mentioned publication, the high-pressure liquid refrigerant condensed in the indoor heat exchanger during the heating operation is primarily decompressed by the indoor capillary tube to an intermediate pressure, and then the outdoor auxiliary heat exchanger is used. By supercooling in this manner, freezing of the lower part of the outdoor heat exchanger is prevented by heat radiation from the outdoor auxiliary heat exchanger while suppressing a decrease in the heating capacity. However, icing depends on the outside air temperature, and in the above-described device, even when the outside air temperature is high and icing is not performed, heat is radiated from the outdoor auxiliary heat exchanger, so that there has been a problem that the heating capacity is reduced by the heat radiation. .
本発明はかかる課題を解決した冷暖房装置を提供する
ものである。The present invention is to provide a cooling and heating device that solves such a problem.
（ニ）課題を解決するための手段 本発明は圧縮機、冷暖流路切換弁、室外熱交換器、室
外補助熱交換器、室内熱交換器を環状に接続し、室外補
助熱交換器を室外熱交換器の下部に設けた冷暖房装置に
おいて、室外熱交換器と室外補助熱交換器との間の管路
に暖房運転時に有効となる減圧手段を設けると共に室外
補助熱交換器と室内熱交換器との間の管路に電気式膨張
弁を設け、暖房運転時に外気温度と前記室外補助熱交換
器の温度と比較して前記室外補助熱交換器内の冷媒温度
が外気の露点温度よりも高くなるように前記電気式膨張
弁の弁開度を調節する制御手段を備えたことを特徴とす
る。(D) Means for Solving the Problems The present invention connects a compressor, a cooling / heating passage switching valve, an outdoor heat exchanger, an outdoor auxiliary heat exchanger, and an indoor heat exchanger in a ring shape, and connects the outdoor auxiliary heat exchanger to the outdoor. In a cooling and heating device provided at a lower portion of a heat exchanger, a depressurizing means effective during a heating operation is provided in a pipeline between an outdoor heat exchanger and an outdoor auxiliary heat exchanger, and the outdoor auxiliary heat exchanger and the indoor heat exchanger are provided. Provide an electric expansion valve in the pipeline between the, the refrigerant temperature in the outdoor auxiliary heat exchanger is higher than the dew point temperature of the outdoor air compared with the outside air temperature and the temperature of the outdoor auxiliary heat exchanger during the heating operation. A control means for adjusting a valve opening of the electric expansion valve.
（ホ）作 用 暖房運転時は圧縮機−冷暖流路切換弁−室内熱交換器
−電気式膨張弁−室外補助熱交換器−室外熱交換器−冷
暖流路切換弁−圧縮機と冷媒が循環し、室内熱交換器が
凝縮器として、室外熱交換器が蒸発器として作用するこ
とにより室内が暖房される。かかる暖房運転時、室外熱
交換器の下部が氷結しにくい程度に外気温度が高い場合
は室外補助熱交換器が蒸発器として作用するように電気
式膨張弁の弁開度が制御手段からの信号で絞りぎみに調
節される。一方、室外熱交換器の下部が氷結する程度に
外気温度が低い場合は室外補助熱交換器内の冷媒温度が
外気の露点温度より幾分高めになるように電気式膨張弁
の弁開度が制御手段からの信号で開きぎみに調節され、
室外補助熱交換器から放出される潜熱で室外熱交換器の
下部が氷結するのが防止される。(E) Operation During heating operation, the compressor-cooling / heating passage switching valve-indoor heat exchanger-electric expansion valve-outdoor auxiliary heat exchanger-outdoor heat exchanger-cooling and heating passage switching valve-compressor and refrigerant Circulation is performed, and the indoor heat exchanger acts as a condenser and the outdoor heat exchanger acts as an evaporator, thereby heating the room. During the heating operation, if the outside air temperature is so high that the lower part of the outdoor heat exchanger is hardly frozen, the valve opening of the electric expansion valve is signaled from the control means so that the outdoor auxiliary heat exchanger acts as an evaporator. Is adjusted to the limit. On the other hand, when the outside air temperature is low enough to freeze the lower part of the outdoor heat exchanger, the opening degree of the electric expansion valve is adjusted so that the refrigerant temperature in the outdoor auxiliary heat exchanger becomes somewhat higher than the dew point temperature of the outside air. Adjusted by the signal from the control means,
The lower part of the outdoor heat exchanger is prevented from freezing due to the latent heat released from the outdoor auxiliary heat exchanger.
（ヘ）実施例 本発明の実施例を図面に基づいて説明すると、（１）
は運転周波数が変わる能力可変型圧縮機（２）と、冷暖
流路切換弁（３）と、室外熱交換器（４）と、この室外
熱交換器の下部に一体もしくは別体に設けた室外補助熱
交換器（５）と、毛細管（６）と、逆止弁（７）と、気
液分離器（８）とを内蔵した室外ユニット、（９）は室
内熱交換器（10）と、電動式又は熱電式の電気式膨張弁
（11）とを内蔵した室内ユニットで、これらの機器はユ
ニット間配管（12）（13）を介して図示の如く環状に接
続されている。(F) Embodiment An embodiment of the present invention will be described with reference to the drawings.
Is a variable capacity compressor (2) that changes the operating frequency, a cooling / heating passage switching valve (3), an outdoor heat exchanger (4), and an outdoor unit that is provided integrally or separately below the outdoor heat exchanger. An outdoor unit including an auxiliary heat exchanger (5), a capillary tube (6), a check valve (7), and a gas-liquid separator (8); (9) an indoor heat exchanger (10); This is an indoor unit having a built-in electric or thermoelectric type electric expansion valve (11), and these devices are connected in a ring shape as shown in the drawing via unit piping (12) (13).
（14）は電気式膨張弁（11）の弁開度を調節する制御
手段で、暖房運転時に外気温度を検出する第１のセンサ
（15）と、暖房運転時に室外補助熱交換器（５）の温度
を検出する第２のセンサ（16）と、暖房運転時に室内熱
交換器（10）の冷媒出口温度を検出する第３のセンサ
（17）と、冷房運転時に室内熱交換器（10）の冷媒出口
温度を検出する第４のセンサ（18）と電気的に連結され
ている。(14) control means for adjusting the valve opening of the electric expansion valve (11), a first sensor (15) for detecting the outside air temperature during the heating operation, and an outdoor auxiliary heat exchanger (5) during the heating operation A second sensor (16) for detecting the temperature of the indoor heat exchanger, a third sensor (17) for detecting the refrigerant outlet temperature of the indoor heat exchanger (10) during the heating operation, and an indoor heat exchanger (10) during the cooling operation. Is electrically connected to a fourth sensor (18) for detecting the refrigerant outlet temperature of the second refrigerant.
本発明装置は以上の如く構成されており、暖房運転は
冷暖流路切換弁（３）を実線状態に設定することによ
り、圧縮機（２）から吐出された冷媒は冷却流路切換弁
（３）−ユニット間配管（12）−室内熱交換器（10）−
電気式膨張弁（11）−ユニット間配管（13）−室外補助
熱交換器（５）−毛細管（６）−室外熱交換器（４）−
冷暖流路切換弁（３）−気液分離器（８）を順次経て圧
縮機（２）に帰還され、室内熱交換器（10）が凝縮器と
して、室外熱交換器（４）が蒸発器として作用して室内
が暖房される。かかる暖房運転時において、電気式膨張
弁（11）は第３のセンサ（17）で検出した室内熱交換器
（10）の冷媒出口温度に基づく制御手段（14）からの信
号で弁開度が調節されていると共に、第１のセンサ（1
5）で検出した外気温度と第２のセンサ（16）で検出し
た室外補助熱交換器（５）の温度とを制御手段（14）で
比較し、室外補助熱交換器（５）内の冷媒温度が外気の
露点温度よりも幾分高めになるように電気式膨張弁（1
1）の弁開度が調節されている。換言すれば、室外熱交
換器（４）の下部が氷結しにくい程度に外気温度が高い
場合は室外補助熱交換器（５）が蒸発器として作用する
ように電気式膨張弁（11）の弁開度が制御手段（14）か
らの信号で絞りぎみに調節され、一方、室外熱交換器
（４）の下部が氷結する程度に外気温度が低い場合は室
外補助熱交換器（５）内の冷媒温度が外気の露点温度よ
りも幾分高めになるように電気式膨張弁（11）の弁開度
が制御手段（14）からの信号で開きぎみに調節され、室
外補助熱交換器（５）から放出される潜熱で室外熱交換
器（４）の下部が氷結するのが防止される。The apparatus of the present invention is configured as described above. In the heating operation, the refrigerant discharged from the compressor (2) is set to the cooling flow path switching valve (3) by setting the cooling / heating flow path switching valve (3) to a solid line state. )-Unit piping (12)-Indoor heat exchanger (10)-
Electric expansion valve (11)-piping between units (13)-outdoor auxiliary heat exchanger (5)-capillary tube (6)-outdoor heat exchanger (4)-
It is returned to the compressor (2) through the cooling / heating flow path switching valve (3) and the gas-liquid separator (8) in order, and the indoor heat exchanger (10) serves as a condenser and the outdoor heat exchanger (4) serves as an evaporator. And the room is heated. During the heating operation, the electric expansion valve (11) has a valve opening degree determined by a signal from the control means (14) based on the refrigerant outlet temperature of the indoor heat exchanger (10) detected by the third sensor (17). The first sensor (1
The outside air temperature detected in 5) and the temperature of the outdoor auxiliary heat exchanger (5) detected by the second sensor (16) are compared by the control means (14), and the refrigerant in the outdoor auxiliary heat exchanger (5) is compared. Electric expansion valve (1) so that the temperature is slightly higher than the dew point of the outside air.
1) The valve opening is adjusted. In other words, when the outside air temperature is so high that the lower part of the outdoor heat exchanger (4) is not easily frozen, the valve of the electric expansion valve (11) is operated so that the outdoor auxiliary heat exchanger (5) acts as an evaporator. The degree of opening is adjusted to a minimum by a signal from the control means (14). On the other hand, when the outside air temperature is low enough to freeze the lower part of the outdoor heat exchanger (4), the inside of the outdoor auxiliary heat exchanger (5) The degree of opening of the electric expansion valve (11) is adjusted so as to be slightly higher than the dew point temperature of the outside air by a signal from the control means (14), and the outdoor auxiliary heat exchanger (5) is controlled. ) Prevents freezing of the lower part of the outdoor heat exchanger (4) due to the latent heat released from the heat exchanger.
冷房運転は冷暖流路切換弁（３）を破線状態に設定す
ることにより、圧縮機（２）から吐出された冷媒は冷暖
流路切換弁（３）−室外熱交換器（４）−逆止弁（７）
−室外補助熱交換器（５）−ユニット間配管（13）−電
気式膨張弁（11）−室内熱交換器（10）−冷暖流路切換
弁（３）−気液分離器（８）を順次経て圧縮機（２）に
帰還され、室外熱交換器（４）が凝縮器として、室内熱
交換器（10）が蒸発器として作用して室内が冷房され
る。かかる冷房運転時において、室外補助熱交換器
（５）は過冷却器として作用すると共に電気式膨張弁
（11）は第４のセンサ（18）で検出した室内熱交換器
（10）の冷媒出口温度に基づく制御手段（14）からの信
号で弁開度が調整されている。In the cooling operation, the refrigerant discharged from the compressor (2) is set by the cooling / heating passage switching valve (3) -the outdoor heat exchanger (4) -the check valve by setting the cooling / heating passage switching valve (3) to the broken line state. Valve (7)
-Outdoor auxiliary heat exchanger (5)-Unit piping (13)-Electric expansion valve (11)-Indoor heat exchanger (10)-Cooling / heating passage switching valve (3)-Gas-liquid separator (8) The heat is sequentially returned to the compressor (2), and the outdoor heat exchanger (4) functions as a condenser, and the indoor heat exchanger (10) functions as an evaporator to cool the room. During such cooling operation, the outdoor auxiliary heat exchanger (5) acts as a subcooler, and the electric expansion valve (11) operates as a refrigerant outlet of the indoor heat exchanger (10) detected by the fourth sensor (18). The valve opening is adjusted by a signal from the control means (14) based on the temperature.
尚、上記実施例において、暖房運転時に室外熱交換器
（４）の氷結防止を行なうために外気温度を第１のセン
サ（15）で、室外補助熱交換器（５）の温度を第２のセ
ンサ（16）で夫々検出してこの温度差に基づいて電気式
膨張弁（11）の弁開度を調節するようにしたが、室外補
助熱交換器（５）の温度と相関関係にある室内ユニット
（９）の空気吹出温度を第２のセンサ（16）で検出する
ようにしても良い。In the above-mentioned embodiment, in order to prevent icing of the outdoor heat exchanger (4) during the heating operation, the outside air temperature is measured by the first sensor (15), and the temperature of the outdoor auxiliary heat exchanger (5) is measured by the second sensor. The opening degree of the electric expansion valve (11) is adjusted based on the temperature difference detected by the sensor (16), however, the indoor temperature is correlated with the temperature of the outdoor auxiliary heat exchanger (5). The air blowing temperature of the unit (9) may be detected by the second sensor (16).
（ト）発明の効果 本発明によれば、制御手段にて暖房運転時に外気温度
と前記室外補助熱交換器の温度と比較して室外補助熱交
換器内の冷媒温度が外気の露点温度よりも高くなるよう
に電気式膨張弁の弁開度を調節することにより、室外熱
交換器の氷結度合いに対する外気温度を制御手段に予め
認識させることなく室外熱交換器の下部が氷結する低外
気温時には室外補助熱交換器から放熱され、氷結しにく
い高外気温時には室外補助熱交換器から放熱されないの
で、室内熱交換器で凝縮した液冷媒が保有する潜熱を氷
結防止に有効に活用でき、暖房能力の低下を最小限に抑
えることができる。(G) Effect of the Invention According to the present invention, the temperature of the refrigerant in the outdoor auxiliary heat exchanger is lower than the dew point temperature of the outdoor air by the control means comparing the outside air temperature and the temperature of the outdoor auxiliary heat exchanger during the heating operation. By adjusting the valve opening degree of the electric expansion valve so as to be higher, the lower part of the outdoor heat exchanger freezes at a low outdoor temperature when the lower part of the outdoor heat exchanger freezes without the control means previously recognizing the outside air temperature with respect to the degree of freezing of the outdoor heat exchanger. Heat is radiated from the outdoor auxiliary heat exchanger and is not radiated from the outdoor auxiliary heat exchanger at high outdoor temperatures where it is difficult to freeze. Can be minimized.
図面は本発明の実施例を示す冷暖房装置の冷媒回路図で
ある。 （２）……圧縮機、（３）……冷暖流路切換弁、（４）
……室外熱交換器、（５）……室外補助熱交換器、（1
0）……室内熱交換器、（11）……電気式膨張弁、（1
4）……制御手段。The drawing is a refrigerant circuit diagram of a cooling and heating device showing an embodiment of the present invention. (2) Compressor (3) Cooling / heating channel switching valve (4)
…… Outdoor heat exchanger, (5) …… Outdoor auxiliary heat exchanger, (1
0) ... indoor heat exchanger, (11) ... electric expansion valve, (1
4) Control means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 相沢 行雄 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 実開 昭64−41052（ＪＰ，Ｕ) ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yukio Aizawa 2--18 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd.
Claims (1)
室外補助熱交換器、室内熱交換器を環状に接続し、室外
補助熱交換器を室外熱交換器の下部に設けた冷暖房装置
において、室外熱交換器と室外補助熱交換器との間の管
路に暖房運転時に有効となる減圧手段を設けると共に室
外補助熱交換器と室内熱交換器との間の管路に電気式膨
張弁を設け、暖房運転時に外気温度と前記室外補助熱交
換器の温度とを比較して前記室外補助熱交換器内の冷媒
温度が外気の露点温度よりも高くなるように前記電気式
膨張弁の弁開度を調節する制御手段を備えたことを特徴
とする冷暖房装置。A compressor, a cooling / heating passage switching valve, an outdoor heat exchanger,
In a cooling and heating device in which an outdoor auxiliary heat exchanger and an indoor heat exchanger are connected in a ring and the outdoor auxiliary heat exchanger is provided below the outdoor heat exchanger, a pipe between the outdoor heat exchanger and the outdoor auxiliary heat exchanger is provided. The path is provided with a decompression means that is effective during the heating operation, and an electric expansion valve is provided in the pipe between the outdoor auxiliary heat exchanger and the indoor heat exchanger, so that the outdoor air temperature and the outdoor auxiliary heat exchanger A cooling and heating system comprising: a control unit for adjusting a valve opening of the electric expansion valve so that a refrigerant temperature in the outdoor auxiliary heat exchanger is higher than a dew point temperature of the outside air by comparing the temperature with a temperature. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1081115A JP2925570B2 (en) | 1989-03-30 | 1989-03-30 | Air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1081115A JP2925570B2 (en) | 1989-03-30 | 1989-03-30 | Air conditioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02259369A JPH02259369A (en) | 1990-10-22 |
| JP2925570B2 true JP2925570B2 (en) | 1999-07-28 |
Family
ID=13737379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1081115A Expired - Lifetime JP2925570B2 (en) | 1989-03-30 | 1989-03-30 | Air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2925570B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6275242A (en) * | 1985-09-28 | 1987-04-07 | Shimadzu Corp | Nmr imaging device |
-
1989
- 1989-03-30 JP JP1081115A patent/JP2925570B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02259369A (en) | 1990-10-22 |
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