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JP2786911B2 - Air conditioner - Google Patents
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JP2786911B2 - Air conditioner - Google Patents

Air conditioner

Info

Publication number
JP2786911B2
JP2786911B2 JP1301121A JP30112189A JP2786911B2 JP 2786911 B2 JP2786911 B2 JP 2786911B2 JP 1301121 A JP1301121 A JP 1301121A JP 30112189 A JP30112189 A JP 30112189A JP 2786911 B2 JP2786911 B2 JP 2786911B2
Authority
JP
Japan
Prior art keywords
temperature
heat exchanger
rotation speed
engine
compressor
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 - Fee Related
Application number
JP1301121A
Other languages
Japanese (ja)
Other versions
JPH03160281A (en
Inventor
典正 星野
能久 木村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Denki Co Ltd
Original Assignee
Sanyo Denki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Denki Co Ltd filed Critical Sanyo Denki Co Ltd
Priority to JP1301121A priority Critical patent/JP2786911B2/en
Publication of JPH03160281A publication Critical patent/JPH03160281A/en
Application granted granted Critical
Publication of JP2786911B2 publication Critical patent/JP2786911B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Description

【発明の詳細な説明】 (イ)産業上の利用分野 この発明は圧縮機の回転数が可変駆動される空気調和
装置に係り、特に圧縮機がエンジンにより駆動されるエ
ンジン駆動式空気調和装置に関するものである。
The present invention relates to an air conditioner in which the rotation speed of a compressor is variably driven, and more particularly to an engine-driven air conditioner in which the compressor is driven by an engine. Things.

(ロ)従来の技術 エンジン駆動式空気調和装置の従来技術としては、特
開昭58−213161号公報に記載されているものがある。こ
のエンジン駆動式空気調和装置は、エンジンと、このエ
ンジンに駆動される圧縮機、室外熱交換器、減圧器、室
内熱交換器を順次連結し構成したヒートポンプ回路と、
室内温度を検知する温度検知器と、この検知器の検知温
度と設定温度の差に応じてエンジンの回転数を制御する
回転数制御器とから構成されている。
(B) Conventional technology A conventional technology of an engine-driven air conditioner is described in Japanese Patent Application Laid-Open No. 58-213161. The engine-driven air conditioner includes an engine, a compressor driven by the engine, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger that are sequentially connected to each other,
It comprises a temperature detector for detecting the indoor temperature, and a rotation speed controller for controlling the rotation speed of the engine according to the difference between the detected temperature of the detector and the set temperature.

(ハ)発明が解決しようとする課題 前述したエンジン駆動式空気調和装置と同種のものに
おいては、冷房時において、圧縮機の吸込側の圧力が、
例えば、4.5kg/cm2以下になったら、圧縮機の吐出側の
冷媒流路と吸込側の冷媒流路とを結ぶ管路に設けられた
容量制御弁を開き、ホットガスを吸込側に流し、吸込圧
力を上げ蒸発器での冷媒の蒸発圧力及び蒸発温度を上げ
て、蒸発器での着霜防止を行なっているものがある。
(C) Problems to be Solved by the Invention In the same type of engine-driven air conditioner as described above, during cooling, the pressure on the suction side of the compressor becomes
For example, when equal to or less than 4.5 kg / cm 2, open the displacement control valve provided in the conduit connecting the refrigerant flow path on the discharge side of the compressor and the suction-side refrigerant passage of flowing a hot gas to the suction side In some cases, the suction pressure is increased and the evaporation pressure and evaporation temperature of the refrigerant in the evaporator are increased to prevent frost formation in the evaporator.

しかし、このエンジン駆動式空気調和装置では、リニ
アに開度を制御できる前記容量制御弁の価格が高く、か
つまた、容量制御弁を閉じたときに冷媒の漏れがあるた
め、信頼性も充分でないという欠点があった。
However, in this engine-driven air conditioner, the capacity of the displacement control valve that can linearly control the opening is expensive, and the refrigerant leaks when the displacement control valve is closed, so that the reliability is not sufficient. There was a disadvantage.

この発明は、蒸発器での着霜防止を高い信頼性で行な
えるエンジン駆動式空気調和装置を提供するものであ
る。
The present invention provides an engine-driven air conditioner that can reliably prevent frost formation on an evaporator.

(ニ)課題を解決するための手段 この発明は、前述した従来技術の課題を解決するため
に為されたものであり、回転数が可変されて駆動される
圧縮機、室外熱交換器、減圧器、複数の室内熱交換器を
順次連結したヒートポンプ回路と、前記圧縮機の回転数
を制御する回転数制御器とを有する空気調和装置におい
て、前記室内熱交換器に冷媒の蒸発温度を検知する温度
検知器をそれぞれ設け、前記回転数制御器は冷房運転中
の前記室内熱交換器に設けた前記温度検知器の検知温度
値のうち最低温度値が所定値以下になった場合、前記圧
縮機の回転数を低下させることを特徴とする。
(D) Means for Solving the Problems The present invention has been made to solve the above-mentioned problems of the prior art, and a compressor driven at a variable rotational speed, an outdoor heat exchanger, a decompression device, An air conditioner having a heat pump circuit in which a plurality of indoor heat exchangers are sequentially connected, and a rotation speed controller for controlling the rotation speed of the compressor, wherein the indoor heat exchanger detects the evaporation temperature of the refrigerant. A temperature detector is provided, and the rotation speed controller is a compressor when the lowest temperature value among the detected temperature values of the temperature detectors provided in the indoor heat exchanger during the cooling operation is equal to or less than a predetermined value. Is characterized in that the number of revolutions of is reduced.

(ホ)作用 本発明をエンジン駆動式空気調和装置に適用した場
合、冷房時において負荷の減少により、運転中の室内熱
交換器のうち或る室内熱交換器での吸込み空気の温度が
極度に低下した場合、蒸発器とし使用される室内熱交換
器での汲上げ熱量が、標準状態のときに比べて低下する
ので、冷媒の蒸発圧力及び冷媒の蒸発温度も、標準状態
のときに比べて低下する。
(E) Function When the present invention is applied to an engine-driven air conditioner, the temperature of the intake air in a certain indoor heat exchanger among the operating indoor heat exchangers becomes extremely low due to a decrease in load during cooling. When the temperature decreases, the amount of heat pumped by the indoor heat exchanger used as an evaporator is reduced as compared with the standard state, so that the refrigerant evaporation pressure and the refrigerant evaporation temperature are also compared with those in the standard state. descend.

この冷媒の蒸発温度が所定の温度まで低下し、この所
定の温度を温度検知器が検知したとき、回転数制御器が
エンジンの回転数を低下させる。エンジンの回転数が低
下すると、ヒートポンプ回路の冷媒循環量が減少し、標
準状態のときに比べて、室内熱交換器での少ない熱の汲
上げ熱量に応じた冷媒循環量になるため、蒸発器での冷
媒の蒸発圧力及び蒸発温度が、元の蒸発圧力や蒸発温度
に戻る。つまり、蒸発器での冷媒の蒸発圧力や蒸発温度
が上昇する。
When the evaporation temperature of the refrigerant drops to a predetermined temperature and the temperature detector detects the predetermined temperature, the rotation speed controller lowers the rotation speed of the engine. When the engine speed decreases, the amount of refrigerant circulated in the heat pump circuit decreases, and the amount of refrigerant circulated according to the amount of heat pumped by the indoor heat exchanger is smaller than in the standard state. The evaporating pressure and the evaporating temperature of the refrigerant return to the original evaporating pressure and the evaporating temperature. That is, the evaporation pressure and the evaporation temperature of the refrigerant in the evaporator increase.

(ヘ)実施例 この発明の一実施例を図面と共に説明する。図面は本
発明によるエンジン駆動式空気調和装置回路構成図で、
(1)はガスエンジン、(2)はこのガスエンジンの駆
動力がたわみ継手(3)で伝えられ、駆動される圧縮
機、(4)はこの圧縮機の吸込側に設けられたアキュー
ムレータ、(5)は冷媒の流量を冷房、暖房に応じて切
換える四方弁、(6)は膨張弁[減圧器]、(7)は室
内熱交換器、(8)は室外熱交換器である。前記圧縮機
(2)、四方弁(5)、室外熱交換器(8)、膨張弁
(6)、室内熱交換器(7)等の主要構成部材で、ヒー
トポンプ回路(9)が構成されている。
(F) Embodiment One embodiment of the present invention will be described with reference to the drawings. The drawing is an engine driven air conditioner circuit configuration diagram according to the present invention,
(1) is a gas engine, (2) is a compressor driven by the driving force of the gas engine transmitted through a flexible coupling (3), (4) is an accumulator provided on the suction side of the compressor, (4) 5) is a four-way valve for switching the flow rate of the refrigerant in accordance with cooling and heating, (6) is an expansion valve [decompressor], (7) is an indoor heat exchanger, and (8) is an outdoor heat exchanger. The main components such as the compressor (2), the four-way valve (5), the outdoor heat exchanger (8), the expansion valve (6), and the indoor heat exchanger (7) constitute a heat pump circuit (9). I have.

また、前記エンジン(1)、圧縮機(2)、室外熱交
換器(8)、膨張弁(6)、四方弁(5)等の主要構成
部材で室外ユニット(A)が構成されている。
The outdoor unit (A) is composed of main components such as the engine (1), the compressor (2), the outdoor heat exchanger (8), the expansion valve (6), and the four-way valve (5).

(10)は前記膨張弁(6)の開度を制御するために設
けられた感温部、(11)は逆止弁、(12)はレシーバタ
ンク、(13)はストレーナー、(14)は電磁弁、(15)
(16)は冷媒の分流器である。
(10) is a temperature sensing part provided for controlling the opening of the expansion valve (6), (11) is a check valve, (12) is a receiver tank, (13) is a strainer, and (14) is Solenoid valve, (15)
(16) is a refrigerant flow divider.

(17)は冷媒吐出流路(18)に設けられたオイルセパ
レータ、(19)(20)は冷媒吐出流路(18)と冷媒吸込
流路(21)とを結ぶ管路で、それぞれの管路には電磁弁
(22)(23)が設けられている。また、管路(19)は約
1m、管路(20)は約0.5mと云うように長さが異なってお
り、管路(20)の方が冷媒が通過し易いように短くなっ
ている。
(17) is an oil separator provided in the refrigerant discharge flow path (18), (19) and (20) are pipes connecting the refrigerant discharge flow path (18) and the refrigerant suction flow path (21). Solenoid valves (22) and (23) are provided on the road. The pipeline (19) is approximately
The length of the pipe (20) is 1 m and the pipe (20) is about 0.5 m, and the length of the pipe (20) is shorter so that the refrigerant can easily pass therethrough.

(24)はアキュームレータ(4)と圧縮機(2)とを
結ぶ管路(25)途中に設けられた電磁弁、(26)はこの
電磁弁をバイパスするように設けられたバイパス管、
(27)はこのバイパス管に並列に設けた管で、この管に
電磁弁(28)が設けられている。
(24) a solenoid valve provided in the middle of a pipe (25) connecting the accumulator (4) and the compressor (2), (26) a bypass pipe provided to bypass the solenoid valve,
(27) is a pipe provided in parallel with this bypass pipe, and this pipe is provided with a solenoid valve (28).

(29)は冷房運転のとき蒸発器として働く室内熱交換
器(7)の中央部に設けられた温度検知器である。
(B)は前記室内熱交換器(7)、温度検知器(29)を
備えた室内ユニットで、この室内ユニットにはこの他
に、室内熱交換器(7)のそれぞれ冷媒流路の入口・出
口に設けられた温度検知器(30)(31)、電動弁(3
2)、ストレーナー(33)(34)を備えている。また、
この発明によるエンジン駆動式空気調和装置では、この
ような構成の室内ユニットをあと5台(B1)(B2)(B
3)(B4)(B5)備えている。これら室内ユニット
(B)(B1)〜(B5)は必ずしも運転馬力の同一のもの
を使用しておらず、室外ユニット(A)の運転馬力が15
馬力であるので、室内ユニットの総運転馬力も15馬力に
なるように構成している。
(29) is a temperature detector provided at the center of the indoor heat exchanger (7) that functions as an evaporator during cooling operation.
(B) is an indoor unit provided with the indoor heat exchanger (7) and the temperature detector (29). In addition to this, the indoor unit has an inlet / outlet of a refrigerant passage of the indoor heat exchanger (7). Temperature detectors (30) and (31) provided at the outlet, motorized valves (3
2), equipped with strainers (33) and (34). Also,
In the engine-driven air conditioner according to the present invention, five more indoor units (B1) (B2) (B
3) (B4) (B5) are provided. These indoor units (B), (B1) to (B5) do not necessarily use the same operating horsepower, and the operating horsepower of the outdoor unit (A) is 15 units.
Because it is a horsepower, the total operating horsepower of the indoor unit is configured to be 15 horsepower.

(35)は前記エンジン(1)を冷却する冷却水回路
で、この冷却水回路はエンジン(1)の熱交換器[図示
せず]、排気ガス熱交換器(36)、冷却水管路(37)、
ラジエータ(38)、ラジエータキャップ(39)、冷却水
リザーブタンク(40)、冷却水加圧ポンプ(41)で構成
されている。
Reference numeral (35) denotes a cooling water circuit for cooling the engine (1). The cooling water circuit includes a heat exchanger (not shown) of the engine (1), an exhaust gas heat exchanger (36), and a cooling water pipe (37). ),
It comprises a radiator (38), a radiator cap (39), a cooling water reserve tank (40), and a cooling water pressurizing pump (41).

(42)は回転数制御器(43)を備えた制御装置で、こ
れは前記温度検知器の検知した最低温度に応じて、エン
ジン(1)の回転数、電磁弁(22)(23)(24)(28)
の開閉を制御している。
(42) is a control device provided with a rotation speed controller (43), which controls the rotation speed of the engine (1), the solenoid valves (22), (23) and (23) according to the minimum temperature detected by the temperature detector. 24) (28)
The opening and closing of is controlled.

このように構成された本発明によるエンジン駆動式空
気調和装置においては、エンジン駆動式空気調和装置が
冷房運転されると、室内ユニット(B)の室内熱交換器
(7)が蒸発器として働く。回転数制御器(43)は、設
定温度と室内温度との差に応じて、また、運転される室
内ユニットの総運転馬力に応じて、圧縮機(2)の回転
数を増減制御する。
In the engine-driven air conditioner thus configured according to the present invention, when the engine-driven air conditioner performs a cooling operation, the indoor heat exchanger (7) of the indoor unit (B) functions as an evaporator. A rotation speed controller (43) controls the rotation speed of the compressor (2) to increase or decrease according to the difference between the set temperature and the indoor temperature, and according to the total operating horsepower of the indoor unit to be operated.

しかし、負荷の減少、例えば室内熱交換器(7)の吸
込み空気温度の低下等によって室内熱交換器(7)での
冷媒の蒸発温度が0℃以下に低下すると、室内熱交換器
(7)に霜が付着してくる。室内熱交換器(7)に着霜
してくると、室内ユニット(B)の能力が低下するの
で、室内熱交換器(7)での着霜防止は重要である。
However, when the evaporation temperature of the refrigerant in the indoor heat exchanger (7) decreases to 0 ° C. or less due to a decrease in load, for example, a decrease in the intake air temperature of the indoor heat exchanger (7), the indoor heat exchanger (7). Frost adheres to the surface. When frost forms on the indoor heat exchanger (7), the performance of the indoor unit (B) is reduced. Therefore, prevention of frost formation on the indoor heat exchanger (7) is important.

運転されている室内ユニットの温度検知器の検知した
最低温度に応じて、エンジン駆動式空気調和装置は、次
に説明するように制御される。
The engine-driven air conditioner is controlled in accordance with the lowest temperature detected by the temperature detector of the operating indoor unit as described below.

今、室内ユニット(B)と共に室内ユニットが複数運
転されて[ただし、総運転馬力が6.5馬力以上とす
る]、温度検知器での検知した最低温度が低下している
ときの制御について説明する。このとき、最低温度は表
1の左側のいずれかの制御ゾーンにある。
Now, a description will be given of control when a plurality of indoor units are operated together with the indoor unit (B) (however, the total operating horsepower is 6.5 horsepower or more) and the minimum temperature detected by the temperature detector is lowered. At this time, the minimum temperature is in one of the control zones on the left side of Table 1.

前記最低温度が、例えば、2.5℃のとき、最低温度は
Aゾーンにあり、このAゾーンに対応する制御、つま
り、表2の左側でのAゾーンに対応する制御、前記通常
運転が行なわれる。
When the minimum temperature is, for example, 2.5 ° C., the minimum temperature is in the zone A, and the control corresponding to the zone A, that is, the control corresponding to the zone A on the left side of Table 2, and the normal operation are performed.

しかし、前記最低温度が低下して、2℃未満、例えば
1.5℃になると、この温度はBゾーンにあり、このBゾ
ーンに対応する制御が行なわれる。つまり、その運転馬
力相当でのエンジン(1)の最低回転数にエンジン
(1)の回転数が下げられる。
However, the minimum temperature is reduced to less than 2 ° C., for example
When the temperature reaches 1.5 ° C., the temperature is in the B zone, and the control corresponding to the B zone is performed. That is, the rotation speed of the engine (1) is reduced to the minimum rotation speed of the engine (1) corresponding to the operating horsepower.

エンジン(1)の回転数が下げられると、冷媒の循環
量が低下して、室内ユニットでの汲上げ熱量が低下する
ので、室内熱交換器での冷媒の蒸発圧力や蒸発温度が上
昇するようになる。
When the rotation speed of the engine (1) is reduced, the amount of refrigerant circulated is reduced, and the amount of heat pumped in the indoor unit is reduced. Therefore, the evaporation pressure and the evaporation temperature of the refrigerant in the indoor heat exchanger are increased. become.

しかし、この制御にもかかわらず、前記最低温度が低
下して、1℃未満、例えば0.5℃になると、この温度は
Cゾーンにあり、このCゾーンに対応する制御が行なわ
れる。つまり、室内ユニットの総運転馬力の値にかかわ
らず、エンジンの最低の回転数[800rpm]にエンジン
(1)の回転数が下げられ、さらに制御装置(42)によ
って電磁弁(22)が開かれる。エンジン(1)の回転数
が下げられると共に、圧縮機(2)の吐出側のホットガ
スが管路(25)に導かれるので、冷媒の蒸発圧力と蒸発
温度がさらに上昇し易くなる。
However, in spite of this control, when the minimum temperature decreases and becomes less than 1 ° C., for example, 0.5 ° C., this temperature is in the C zone, and the control corresponding to the C zone is performed. That is, regardless of the value of the total operating horsepower of the indoor unit, the rotation speed of the engine (1) is reduced to the lowest rotation speed of the engine [800 rpm], and the solenoid valve (22) is opened by the control device (42). . Since the rotation speed of the engine (1) is reduced and the hot gas on the discharge side of the compressor (2) is guided to the pipe (25), the evaporation pressure and the evaporation temperature of the refrigerant are more likely to increase.

これらの制御で前記最低温度が上昇し始めると、エン
ジン駆動式空気調和装置の制御は、表1の右側の制御ゾ
ーンに対応する制御が行なわれる。しかし、今の制御ゾ
ーン[Cゾーン]に対応する制御はこのまま継続され、
この蒸発温度の上昇時における制御ゾーン[表1の右側
でのCゾーン]を越える温度の上昇がなければ前記Cゾ
ーンの制御はこのまま変えられない。例えば、最低の冷
媒蒸発温度が前記0.5℃から0.9℃に上昇したとしても、
また、前記0.5℃から2.5℃に上昇したとしても、最低温
度上昇時のBゾーンに到達していないので、制御はCゾ
ーンの制御のままであり、前記最低温度が、3℃以上に
なったときに、Bゾーンの制御が行なわれる。
When the minimum temperature starts to increase by these controls, the control of the engine-driven air conditioner is performed according to the control zone on the right side of Table 1. However, the control corresponding to the current control zone [C zone] is continued as it is,
Unless the temperature rises beyond the control zone [C zone on the right side of Table 1] at the time of the increase in the evaporation temperature, the control of the C zone cannot be changed as it is. For example, even if the lowest refrigerant evaporation temperature rises from 0.5 ° C to 0.9 ° C,
Further, even if the temperature rose from 0.5 ° C. to 2.5 ° C., the control did not reach the B zone at the time of the minimum temperature rise, so that the control remained the control of the C zone, and the minimum temperature became 3 ° C. or more. At times, control of the B zone is performed.

(ト)発明の効果 以上説明したように、本発明によれば、蒸発器として
使用される複数の室内熱交換器での冷媒の蒸発温度のう
ち最低のものが所定温度に低下したとき、回転数制御器
が圧縮機の回転数を低下させて、室内熱交換器での冷媒
の蒸発温度を元の温度まで上昇させるので、冷房運転中
に各室内熱交換器での着霜防止を確実に行える。
(G) Effects of the Invention As described above, according to the present invention, when the lowest one of the evaporation temperatures of the refrigerant in the plurality of indoor heat exchangers used as the evaporator is reduced to the predetermined temperature, The number controller reduces the number of revolutions of the compressor and raises the evaporation temperature of the refrigerant in the indoor heat exchanger to the original temperature, so that frost formation in each indoor heat exchanger is reliably prevented during cooling operation. I can do it.

【図面の簡単な説明】[Brief description of the drawings]

図面は本発明によるエンジン駆動式空気調和装置の回路
構成図である。 (1)……エンジン、(2)……圧縮機、(5)……四
方弁、(6)……膨張弁[減圧器]、(7)……室内熱
交換器、(8)……室外熱交換器、(9)……ヒートポ
ンプ回路、(29)……温度検知器、(30)……温度検知
器、(31)……温度検知器、(43)……回転数制御器。
The drawing is a circuit configuration diagram of the engine-driven air conditioner according to the present invention. (1) ... engine (2) ... compressor (5) ... four-way valve (6) ... expansion valve [decompressor] (7) ... indoor heat exchanger (8) ... Outdoor heat exchanger, (9) heat pump circuit, (29) temperature detector, (30) temperature detector, (31) temperature detector, (43) rotation speed controller.

フロントページの続き (58)調査した分野(Int.Cl.6,DB名) F25B 13/00 104 F24F 11/02 102 F25B 27/00 F25B 5/02 510 F25B 5/02 301Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) F25B 13/00 104 F24F 11/02 102 F25B 27/00 F25B 5/02 510 F25B 5/02 301

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】回転数が可変されて駆動される圧縮機、室
外熱交換器、減圧器、複数の室内熱交換器を順次連結し
たヒートポンプ回路と、前記圧縮機の回転数を制御する
回転数制御器とを有する空気調和装置において、前記室
内熱交換器に冷媒の蒸発温度を検知する温度検知器をそ
れぞれ設け、前記回転数制御器は冷房運転中の前記室内
熱交換器に設けた前記温度検知器の検知温度値のうち最
低温度値が所定値以下になった場合、前記圧縮機の回転
数を低下させることを特徴とする空気調和装置。
1. A heat pump circuit in which a compressor, an outdoor heat exchanger, a decompressor, and a plurality of indoor heat exchangers are sequentially connected to be driven with variable rotation speed, and a rotation speed for controlling the rotation speed of the compressor. In the air conditioner having a controller, the indoor heat exchanger is provided with a temperature detector for detecting an evaporation temperature of the refrigerant, and the rotation speed controller is provided with the temperature provided in the indoor heat exchanger during a cooling operation. When the lowest temperature value among the detected temperature values of the detector becomes equal to or less than a predetermined value, the rotation speed of the compressor is reduced.
JP1301121A 1989-11-20 1989-11-20 Air conditioner Expired - Fee Related JP2786911B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1301121A JP2786911B2 (en) 1989-11-20 1989-11-20 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1301121A JP2786911B2 (en) 1989-11-20 1989-11-20 Air conditioner

Publications (2)

Publication Number Publication Date
JPH03160281A JPH03160281A (en) 1991-07-10
JP2786911B2 true JP2786911B2 (en) 1998-08-13

Family

ID=17893082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1301121A Expired - Fee Related JP2786911B2 (en) 1989-11-20 1989-11-20 Air conditioner

Country Status (1)

Country Link
JP (1) JP2786911B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4590777B2 (en) * 2001-05-16 2010-12-01 アイシン精機株式会社 heat pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6166038A (en) * 1984-09-07 1986-04-04 Matsushita Electric Ind Co Ltd Air conditioner defrosting control device
JPS62108734U (en) * 1985-12-26 1987-07-11
JPS62213653A (en) * 1986-03-14 1987-09-19 株式会社日立製作所 Air conditioner
JPH076712B2 (en) * 1987-07-10 1995-01-30 株式会社東芝 Refrigeration cycle equipment

Also Published As

Publication number Publication date
JPH03160281A (en) 1991-07-10

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