JPH11304309A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH11304309A JPH11304309A JP10108915A JP10891598A JPH11304309A JP H11304309 A JPH11304309 A JP H11304309A JP 10108915 A JP10108915 A JP 10108915A JP 10891598 A JP10891598 A JP 10891598A JP H11304309 A JPH11304309 A JP H11304309A
- Authority
- JP
- Japan
- Prior art keywords
- solenoid valve
- heat exchanger
- outdoor heat
- outdoor
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
- B60H1/00907—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant changes and an evaporator becomes condenser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00935—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising four way valves for controlling the fluid direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00961—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising means for defrosting outside heat exchangers
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気調和機に係わ
り、室外機の冷媒回路の構成と制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and, more particularly, to a configuration and control of a refrigerant circuit of an outdoor unit.
【０００２】[0002]
【従来の技術】図３（ａ）は、従来の一例を示す空気調
和機の冷媒回路図、（ｂ）は、要部説明図である。図４
（ａ）は、従来の他の例を示す空気調和機の冷媒回路
図、（ｂ）は、要部説明図である。従来の空気調和機の
冷媒回路は、図に示すように、室外機１に収納された圧
縮機２と、四方弁３と、２パスの室外熱交換器５と、絞
り装置６と、室内機１０に収納された室内熱交換器１１
とからなり、順次配管接続されて冷媒回路が構成され、
前記室外熱交換器５に対向して配置された室外ファン４
を備えている。2. Description of the Related Art FIG. 3 (a) is a refrigerant circuit diagram of an air conditioner showing an example of the related art, and FIG. 3 (b) is an explanatory view of a main part. FIG.
(A) is a refrigerant circuit diagram of an air conditioner showing another conventional example, and (b) is an explanatory view of a main part. As shown in the figure, a refrigerant circuit of a conventional air conditioner includes a compressor 2 housed in an outdoor unit 1, a four-way valve 3, a two-pass outdoor heat exchanger 5, a throttle device 6, an indoor unit Indoor heat exchanger 11 housed in 10
Are connected in sequence to form a refrigerant circuit,
An outdoor fan 4 disposed opposite to the outdoor heat exchanger 5
It has.
【０００３】以上の構成において、冷房運転時には、冷
媒流路は破線の矢印のとおり、室外機１の冷媒は、圧縮
機２、四方弁３を経て２パスの室外熱交換器５に向か
う。該冷媒は室外熱交換器３から、絞り装置６を経て前
記室内機１０の室内熱交換器１１に流入する。そして、
該冷媒は、前記室外機１の四方弁３を経て圧縮機２に戻
る。また、暖房運転時には、冷媒流路は実線の矢印のと
おり、冷房時と逆の経路を絞り装置６を経て圧縮機２に
戻る。In the above configuration, during the cooling operation, the refrigerant flow in the outdoor unit 1 passes through the compressor 2 and the four-way valve 3 to the two-pass outdoor heat exchanger 5 as indicated by a broken line arrow. The refrigerant flows from the outdoor heat exchanger 3 via the expansion device 6 into the indoor heat exchanger 11 of the indoor unit 10. And
The refrigerant returns to the compressor 2 via the four-way valve 3 of the outdoor unit 1. Further, during the heating operation, the refrigerant flow path returns to the compressor 2 via the expansion device 6 along a path opposite to that during the cooling as indicated by a solid arrow.
【０００４】ところで、暖房時に前記室外機１の除霜を
行うには、図３に示すように、前記四方弁３を切換え、
冷房サイクルとすることにより行うリバース方式と、図
４に示すように、前記圧縮機２からの吐出ガスをバイパ
ス管７、電磁弁８ａを介して、前記室外熱交換器５の前
記絞り装置６側の一端５ａに注入するホットガスバイパ
ス方式がある。しかしながら、前記いずれの方法でも、
前記室外熱交換器５の風上側のパス部は、風下側のパス
部よりも着霜量が多いにも拘らず、高温の吐出ガスを除
霜開始から終了まで霜の溶け具合に関わらず、前記風上
側のパス部５ａと風下側のパス部５ｂに同量注入してい
るため、同風下側のパス部５ｂはすぐに霜が溶けるが、
前記風上側のパス部５ａの霜が溶けるのは遅く、放熱に
よる損失増大と除霜時間が長くなるおそれがある問題点
があった。In order to defrost the outdoor unit 1 during heating, the four-way valve 3 is switched as shown in FIG.
As shown in FIG. 4, a reverse method performed by using a cooling cycle, and a discharge gas from the compressor 2 is supplied to the outdoor heat exchanger 5 via the bypass pipe 7 and the solenoid valve 8 a on the side of the throttle device 6 of the outdoor heat exchanger 5. There is a hot gas bypass system in which one end 5a is injected. However, in any of the above methods,
Despite the fact that the amount of frost formed on the windward side of the outdoor heat exchanger 5 is greater than that on the leeward side, regardless of the degree of melting of the high-temperature discharge gas from the start to the end of defrosting, Since the same amount is injected into the leeward path portion 5a and the leeward path portion 5b, the frost melts immediately in the leeward path portion 5b.
Melting of the frost in the path part 5a on the windward side is slow, and there is a problem that the loss due to heat dissipation may increase and the defrosting time may be prolonged.
【０００５】[0005]
【発明が解決しようとする課題】本発明においては、前
記問題点に鑑み、室外機の除霜時に、放熱のロスを削減
し、除霜時間を短縮した空気調和機を提供することを目
的としている。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an air conditioner in which the loss of heat radiation is reduced and the defrosting time is reduced when the outdoor unit is defrosted. I have.
【０００６】[0006]
【課題を解決するための手段】本発明は上記の課題を解
決するためになされたもので、圧縮機と、四方弁と、２
パスの室外熱交換器と、絞り装置と、室内熱交換器とか
らなり、これらを冷媒配管により順次配管接続して冷媒
回路を構成し、前記室外熱交換器に対向して配置された
室外ファンを備えるとともに、前記四方弁を切換えるこ
とにより前記室外機の除霜を行う空気調和機において、
前記四方弁と前記室外熱交換器の間より分岐し、同室外
熱交換器の風上側のパス部とを側路により接続する第一
電磁弁と、前記分岐と前記室外熱交換器の風下側のパス
部とを側路により接続する第二電磁弁を配設し、前記室
外熱交換器の前記絞り装置側出口近傍の温度を検出する
温度センサを設け、除霜開始時に、前記第一電磁弁を開
状態、第二電磁弁を閉状態とし、前記温度センサの検出
温度が設定温度を超えたときに、前記第二電磁弁を開状
態とし、前記温度センサの検出温度が所定温度を超えた
ときに、前記第一電磁弁及び、第二電磁弁を閉状態に制
御してなるようにする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a compressor, a four-way valve, and a compressor.
An outdoor heat exchanger comprising a path outdoor heat exchanger, a throttle device, and an indoor heat exchanger, which are sequentially connected by a refrigerant pipe to form a refrigerant circuit, and an outdoor fan disposed opposite to the outdoor heat exchanger. With an air conditioner that performs defrosting of the outdoor unit by switching the four-way valve,
A first solenoid valve that branches from between the four-way valve and the outdoor heat exchanger and connects a path portion on the windward side of the outdoor heat exchanger by a bypass, and a leeward side of the branch and the outdoor heat exchanger. A second electromagnetic valve that connects the path portion of the outdoor heat exchanger by a bypass and a temperature sensor that detects a temperature near the outlet of the outdoor heat exchanger near the expansion device; The valve is opened, the second solenoid valve is closed, and when the temperature detected by the temperature sensor exceeds a set temperature, the second solenoid valve is opened, and the temperature detected by the temperature sensor exceeds a predetermined temperature. In such a case, the first solenoid valve and the second solenoid valve are controlled to be closed.
【０００７】または、圧縮機と、四方弁と、２パスの室
外熱交換器と、絞り装置と、室内熱交換器とからなり、
これらを冷媒配管により順次配管接続して冷媒回路を構
成し、前記室外熱交換器に対向して配置された室外ファ
ンを備えるとともに、前記四方弁を切換えることにより
前記室外機の除霜を行う空気調和機において、前記四方
弁と前記室外熱交換器の間より分岐し、同室外熱交換器
の風上側のパス部とを側路により接続する第一電磁弁
と、前記分岐と前記室外熱交換器の風下側のパス部とを
側路により接続する第二電磁弁を配設し、前記除霜開始
からの時間を計時するタイマーを設け、除霜開始時に、
前記第一電磁弁を開状態、第二電磁弁を閉状態とし、前
記タイマーの計時時間が、切換設定時間を超えたとき
に、前記第二電磁弁を開状態とし、前記タイマーの計時
時間が、所定時間を超えたときに、前記第一電磁弁及
び、第二電磁弁を閉状態に制御してなるようにする。[0007] Alternatively, the compressor comprises a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger.
These are sequentially connected by a refrigerant pipe to form a refrigerant circuit, and an outdoor fan disposed opposite to the outdoor heat exchanger is provided, and air for defrosting the outdoor unit by switching the four-way valve is provided. In the conditioner, a first solenoid valve that branches from between the four-way valve and the outdoor heat exchanger and connects a path on the windward side of the outdoor heat exchanger by a side path, and the branch and the outdoor heat exchange. A second solenoid valve that connects the leeward path of the vessel with a bypass is provided, and a timer is provided for measuring the time from the start of the defrosting.
The first solenoid valve is in the open state, the second solenoid valve is in the closed state, and when the time measured by the timer exceeds the switching set time, the second solenoid valve is opened and the time measured by the timer is measured. When the predetermined time is exceeded, the first solenoid valve and the second solenoid valve are controlled to be closed.
【０００８】あるいは、圧縮機と、四方弁と、２パスの
室外熱交換器と、絞り装置と、室内熱交換器とからな
り、これらを冷媒配管により順次配管接続して冷媒回路
を構成し、前記室外熱交換器に対向して配置された室外
ファンを備えるとともに、前記圧縮機からの吐出ガスを
バイパス管を介して、前記室外熱交換器の前記絞り装置
側に注入することにより前記室外機の除霜を行う空気調
和機において、前記圧縮機の吐出側と前記室外熱交換器
の間より分岐し、同室外熱交換器の風上側のパス部を側
路により接続する第一電磁弁と、前記分岐と前記室外熱
交換器の風下側のパス部とを側路により接続する第二電
磁弁を配設し、前記室外熱交換器の前記四方弁側出口近
傍の温度を検出する温度センサを設け、除霜開始時に、
前記第一電磁弁を開状態、第二電磁弁を閉状態とし、前
記温度センサの検出温度が設定温度を超えたときに、前
記第二電磁弁を開状態とし、前記温度センサの検出温度
が所定温度を超えたときに、前記第二電磁弁及び、第一
電磁弁を閉状態に制御してなるようにする。Alternatively, the refrigerant circuit includes a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger. An outdoor fan disposed opposite to the outdoor heat exchanger, and a discharge gas from the compressor is injected into the outdoor heat exchanger via the bypass pipe into the expansion device side, thereby forming the outdoor unit. In an air conditioner that performs defrosting, a first solenoid valve that branches off from between the discharge side of the compressor and the outdoor heat exchanger and connects a windward path portion of the outdoor heat exchanger by a bypass. A temperature sensor for detecting a temperature in the vicinity of the four-way valve-side outlet of the outdoor heat exchanger, wherein a second solenoid valve connecting the branch and a leeward side path portion of the outdoor heat exchanger is disposed by a bypass. At the beginning of defrosting,
The first solenoid valve is opened, the second solenoid valve is closed, and when the temperature detected by the temperature sensor exceeds a set temperature, the second solenoid valve is opened, and the temperature detected by the temperature sensor is When the temperature exceeds a predetermined temperature, the second solenoid valve and the first solenoid valve are controlled to be closed.
【０００９】もしくは、圧縮機と、四方弁と、２パスの
室外熱交換器と、絞り装置と、室内熱交換器とからな
り、これらを冷媒配管により順次配管接続して冷媒回路
を構成し、前記室外熱交換器に対向して配置された室外
ファンを備えるとともに、前記圧縮機からの吐出ガスを
バイパス管を介して、前記室外熱交換器の前記絞り装置
側に注入することにより前記室外機の除霜を行う空気調
和機において、前記圧縮機の吐出側と前記室外熱交換器
の間より分岐し、同室外熱交換器の風上側のパス部を側
路により接続する第一電磁弁と、前記分岐と前記室外熱
交換器の風下側のパス部とを側路により接続する第二電
磁弁を配設し、前記除霜開始からの時間を計時するタイ
マーを設け、除霜開始時に、前記第一電磁弁を開状態、
第二電磁弁を閉状態とし、前記タイマーの計時時間が、
切換設定時間を超えたときに、前記第二電磁弁を開状態
を閉状態とし、前記タイマーの計時時間が、所定時間を
超えたときに、前記第一電磁弁及び、第二電磁弁を閉状
態に制御してなるようにする。[0009] Alternatively, the refrigerant circuit includes a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger. An outdoor fan disposed opposite to the outdoor heat exchanger, and a discharge gas from the compressor is injected into the outdoor heat exchanger via the bypass pipe into the expansion device side, thereby forming the outdoor unit. In an air conditioner that performs defrosting, a first solenoid valve that branches off from between the discharge side of the compressor and the outdoor heat exchanger and connects a windward path portion of the outdoor heat exchanger by a bypass. A second solenoid valve that connects the branch and the leeward side path portion of the outdoor heat exchanger by a bypass is provided, and a timer is provided for measuring the time from the start of the defrosting. Open the first solenoid valve,
Close the second solenoid valve, the time measured by the timer,
When the switching set time is exceeded, the open state of the second solenoid valve is closed, and when the time measured by the timer exceeds a predetermined time, the first solenoid valve and the second solenoid valve are closed. Be controlled by the state.
【００１０】さらに、前記室外機に室外温度センサを設
け、同室外温度センサの検出温度が設定温度未満のとき
に、前記第二電磁弁を開状態に制御してなるようにす
る。または、前記室外機に除霜回数カウンタを設け、同
除霜回数カウンタの回数が設定回数を超えたときに、前
記第二電磁弁を開状態に制御するとともに、前記除霜回
数カウンタを零に戻してなるようにする。Further, an outdoor temperature sensor is provided in the outdoor unit, and when the detected temperature of the outdoor temperature sensor is lower than a set temperature, the second solenoid valve is controlled to open. Alternatively, a defrosting frequency counter is provided in the outdoor unit, and when the number of times of the defrosting frequency counter exceeds a set number, the second solenoid valve is controlled to an open state, and the defrosting frequency counter is set to zero. Make it come back.
【００１１】[0011]
【発明の実施の形態】以下、発明の実施の形態を実施例
に基づき添付図面を参照して詳細に説明する。図１
（ａ）は、本発明の一実施例を示す空気調和機の冷媒回
路図、（ｂ）は要部説明図、（ｃ）はフローチャートで
ある。本発明の一実施例を示す空気調和機の冷媒回路図
である。なお、構成品の番号は同じものについては同一
の番号を使用する。図において、１は室外機、２は圧縮
機、３は四方弁、４は室外ファン、４ａは第一電磁弁、
４ｂは第二電磁弁、５は２パスの室外熱交換器、６は絞
り装置、１０は室内機、１１は室内熱交換器である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on embodiments with reference to the accompanying drawings. FIG.
(A) is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention, (b) is an explanatory view of a main part, and (c) is a flowchart. 1 is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention. The same numbers are used for the same components. In the figure, 1 is an outdoor unit, 2 is a compressor, 3 is a four-way valve, 4 is an outdoor fan, 4a is a first solenoid valve,
4b is a second solenoid valve, 5 is a two-pass outdoor heat exchanger, 6 is a throttle device, 10 is an indoor unit, and 11 is an indoor heat exchanger.
【００１２】この実施例では、前記室外ファン４による
通風路の中で、風上側のパス部５ａと風下側のパス部５
ｂの２パスを有する室外熱交換器５と、前記絞り装置６
には、膨張弁を用いている。これらを冷媒配管により順
次配管接続して冷媒回路を構成し、前記室外熱交換器５
に対向して配置された室外ファン４を備えている。それ
とともに、前記四方弁３を切換えることにより前記室外
機１の除霜を行う空気調和機を構成する。ここで、前記
四方弁３と前記室外熱交換器５の間より分岐し、同室外
熱交換器５の風上側のパス部５ａとを側路により接続す
る第一電磁弁４ａと、前記分岐と前記室外熱交換器５の
風下側のパス部５ｂとを側路により接続する第二電磁弁
４ｂを配設する。In this embodiment, in the ventilation path of the outdoor fan 4, the windward path portion 5a and the leeward path portion 5a are arranged.
b, the outdoor heat exchanger 5 having two passes,
Uses an expansion valve. These are sequentially connected by a refrigerant pipe to form a refrigerant circuit, and the outdoor heat exchanger 5
And an outdoor fan 4 disposed opposite to the fan. At the same time, an air conditioner that defrosts the outdoor unit 1 by switching the four-way valve 3 is configured. A first electromagnetic valve 4a that branches off from between the four-way valve 3 and the outdoor heat exchanger 5 and connects a path 5a on the windward side of the outdoor heat exchanger 5 by a bypass; A second solenoid valve 4b is provided for connecting the leeward side path portion 5b of the outdoor heat exchanger 5 by a bypass.
【００１３】一方、前記室外熱交換器５の前記絞り装置
６側出口近傍の温度を検出する温度センサ９を設ける。
さらに、前記室外機１に室外温度センサ９ａを設ける。
また、前記温度センサ９、室外温度センサ９ａの出力の
入力部１２と、同入力部１２の信号により前記電磁弁４
ｂ、電磁弁４ａを制御する制御部１３と、制御上の設定
温度、設定時間を記憶する記憶部１４を室外機１内に設
けている。そして、除霜開始時に、前記入力部１２、制
御部１３、記憶部１４を用いて、前記第一電磁弁４ａを
開状態、第二電磁弁４ｂを閉状態とし、前記温度センサ
９の検出温度Ｔｃが設定温度Ｔ１を超えたときに、前記
第二電磁弁４ｂを開状態とするか、 前記室外温度セン
サ９ａの検出温度Ｔａが設定温度Ｔ０未満のときに、前
記第二電磁弁４ｂを開状態に制御している。また、前記
温度センサ９の検出温度Ｔｃが所定温度Ｔ２を超えたと
きに、前記第一電磁弁４ａ及び、第二電磁弁４ｂを閉状
態に制御している。On the other hand, a temperature sensor 9 for detecting the temperature near the outlet of the outdoor heat exchanger 5 on the throttle device 6 side is provided.
Further, the outdoor unit 1 is provided with an outdoor temperature sensor 9a.
In addition, the input unit 12 for the output of the temperature sensor 9 and the outdoor temperature sensor 9a, and the electromagnetic valve 4
b, a control unit 13 for controlling the solenoid valve 4a and a storage unit 14 for storing a set temperature and a set time for control are provided in the outdoor unit 1. At the start of defrosting, the input unit 12, the control unit 13, and the storage unit 14 are used to open the first solenoid valve 4a, close the second solenoid valve 4b, and detect the temperature detected by the temperature sensor 9. The second solenoid valve 4b is opened when Tc exceeds the set temperature T1, or the second solenoid valve 4b is opened when the detected temperature Ta of the outdoor temperature sensor 9a is lower than the set temperature T0. The state is controlled. When the temperature Tc detected by the temperature sensor 9 exceeds a predetermined temperature T2, the first solenoid valve 4a and the second solenoid valve 4b are controlled to be closed.
【００１４】以上の構成において、次に本発明の作用を
説明する。先ず、除霜開始に入ると、前記第一電磁弁４
ａが、開状態、前記第二電磁弁４ｂが、閉状態となる。
（ＳＴ１） そして、前記第一電磁弁４ａを介し前記室外熱交換器５
の風上側のパス部５ａに高温の吐出ガスが注入され除霜
が行われるが、前記風下側のパス部５ｂの除霜は行われ
ない。次いで、前記室外熱交換器５の配管に配設された
温度センサ９の検出温度Ｔｃが、設定温度Ｔ１を超える
かどうか判断し、超えないときは、Ｔｃ＜Ｔ１でＮｏと
なりこの判断を繰り返し、設定温度Ｔ１を超えると、Ｔ
ｃ＞Ｔ１でＹｅｓとなり（ＳＴ２）、前記第二電磁弁４
ｂが、開状態となる。（ＳＴ３）Next, the operation of the present invention in the above configuration will be described. First, when the defrosting starts, the first solenoid valve 4
a is in an open state, and the second solenoid valve 4b is in a closed state.
(ST1) Then, the outdoor heat exchanger 5 is connected via the first solenoid valve 4a.
The high-temperature discharge gas is injected into the leeward path portion 5a to perform defrosting, but the leeward path portion 5b is not defrosted. Next, it is determined whether or not the detected temperature Tc of the temperature sensor 9 disposed on the pipe of the outdoor heat exchanger 5 exceeds the set temperature T1, and if not, the result is No at Tc <T1, and this determination is repeated. When the temperature exceeds the set temperature T1, T
If c> T1, the result is Yes (ST2), and the second solenoid valve 4
b is in the open state. (ST3)
【００１５】あるいは、前記室外機１に室外温度センサ
９ａを設け、同室外温度センサ９ａの検出温度Ｔａが、
設定温度Ｔ０未満（Ｔａ＜Ｔ０）かどうか判断し、設定
温度Ｔ０以上のときは、Ｎｏとなりこの判断を繰り返
し、設定温度Ｔ０より低いと、Ｔａ＜Ｔ０でＹｅｓとな
り（ＳＴ２１）、前記第二電磁弁４ｂを開状態に制御し
ている。（ＳＴ３） このとき、前記風上側のパス部５ａの除霜が進行すると
ともに、前記第二電磁弁４ｂを介し前記風下側のパス部
５ｂにも除霜が行われる。さらに、温度センサ９の検出
温度Ｔｃが、所定温度Ｔ２を超えるかどうか判断し、超
えないときは、Ｔｃ＜Ｔ２でＮｏとなりこの判断を繰り
返し、所定温度Ｔ２を超えると、Ｔｃ＞Ｔ２でＹｅｓと
なり（ＳＴ４）、前記第二電磁弁４ｂを閉状態とし除霜
を完了する。（ＳＴ５）Alternatively, an outdoor temperature sensor 9a is provided in the outdoor unit 1, and the detected temperature Ta of the outdoor temperature sensor 9a is:
It is determined whether or not the temperature is lower than the set temperature T0 (Ta <T0). If the temperature is equal to or higher than the set temperature T0, the determination becomes No. If the temperature is lower than the set temperature T0, the result is Yes with Ta <T0 (ST21). The valve 4b is controlled to be open. (ST3) At this time, as the defrosting of the windward path portion 5a progresses, defrosting is also performed on the leeward path portion 5b via the second solenoid valve 4b. Further, it is determined whether or not the detected temperature Tc of the temperature sensor 9 exceeds the predetermined temperature T2. If not, the result is No at Tc <T2, and this determination is repeated. If the temperature exceeds the predetermined temperature T2, the result is Yes at Tc> T2. (ST4) The second solenoid valve 4b is closed to complete the defrosting. (ST5)
【００１６】図２（ａ）は、本発明の他の実施例を示す
空気調和機の冷媒回路図、（ｂ）は要部説明図、（ｃ）
はフローチャートである。この実施例の場合、室外機１
に収納された圧縮機２と、四方弁３と、風上側のパス部
５ａと風下側のパス部５ｂの２パスを有する室外熱交換
器５と、絞り装置６ｂと、室内熱交換器１１を有する室
内器１０とからなり、これらを冷媒配管により順次配管
接続して冷媒回路を構成し、前記室外熱交換器５に対向
して配置された室外ファン４を備えている。FIG. 2A is a refrigerant circuit diagram of an air conditioner showing another embodiment of the present invention, FIG. 2B is an explanatory view of a main part, and FIG.
Is a flowchart. In the case of this embodiment, the outdoor unit 1
, A four-way valve 3, an outdoor heat exchanger 5 having two paths, an upwind path section 5 a and a leeward path section 5 b, a throttle device 6 b, and an indoor heat exchanger 11. And an indoor unit 10 having an outdoor fan 4 disposed opposite to the outdoor heat exchanger 5 by sequentially connecting these with a refrigerant pipe to form a refrigerant circuit.
【００１７】それとともに、前記圧縮機２からの吐出ガ
スをバイパス管７を介して、前記室外熱交換器５の前記
絞り装置６側の一端５ａに注入することにより前記室外
機１の除霜を行う。ここで、前記圧縮機２の吐出側と前
記室外熱交換器５の間より分岐し、同室外熱交換器５の
風上側のパス部５ａを側路により接続する第一電磁弁８
ａと、前記分岐と前記室外熱交換器５の風下側のパス部
５ｂとを側路により接続する第二電磁弁８ｂを配設して
いる。At the same time, the discharge gas from the compressor 2 is injected into one end 5a of the outdoor heat exchanger 5 on the throttle device 6 side via a bypass pipe 7, thereby defrosting the outdoor unit 1. Do. Here, a first solenoid valve 8 that branches off from the discharge side of the compressor 2 and the outdoor heat exchanger 5 and connects a path 5a on the windward side of the outdoor heat exchanger 5 by a side path.
a, and a second solenoid valve 8b that connects the branch and the leeward path portion 5b of the outdoor heat exchanger 5 by a bypass.
【００１８】それとともに、前記除霜開始からの時間を
計時するタイマー１５を設ける。または、前記室外機に
除霜回数カウンタ１６を設ける。また、前記電磁弁４
ｂ、電磁弁４ａを制御する制御部１３と、制御上の設定
温度、設定時間を記憶する記憶部１４を室外機１内に設
けている。そして、除霜開始時に、前記入力部１２、制
御部１３、記憶部１４を用いて、前記第一電磁弁８ａを
開状態、第二電磁弁８ｂを閉状態とし、前記タイマー１
５の計時時間ｔが、切換設定時間ｔ１を超えたときに、
前記第二電磁弁８ｂを開状態とするか、または、前記除
霜回数カウンタ１６の回数Ｃｎが設定回数Ｃ０を超えた
ときに、前記第二電磁弁８ｂを開状態に制御するととも
に、前記除霜回数カウンタＣｎを零に戻している。さら
に、前記タイマー１５の計時時間ｔが、所定時間ｔ２を
超えたときに、前記第二電磁弁８ａ及び、第一電磁弁８
ｂを閉状態に制御している。At the same time, a timer 15 for measuring the time from the start of the defrosting is provided. Alternatively, a defrosting frequency counter 16 is provided in the outdoor unit. The electromagnetic valve 4
b, a control unit 13 for controlling the solenoid valve 4a and a storage unit 14 for storing a set temperature and a set time for control are provided in the outdoor unit 1. At the start of defrosting, the input unit 12, the control unit 13, and the storage unit 14 are used to open the first solenoid valve 8a, close the second solenoid valve 8b,
When the counted time t of 5 exceeds the switching set time t1,
When the second solenoid valve 8b is opened, or when the number Cn of the defrost counter 16 exceeds a set number C0, the second solenoid valve 8b is controlled to the open state, and the second solenoid valve 8b is opened. The frost counter Cn is returned to zero. Further, when the time t counted by the timer 15 exceeds a predetermined time t2, the second solenoid valve 8a and the first solenoid valve 8
b is controlled to a closed state.
【００１９】以上の構成において、次に本発明の作用を
説明する。先ず、除霜開始に入ると、前記第一電磁弁４
ａが、開状態、前記第二電磁弁４ｂが、開状態となる。
（ＳＴ１） そして、前記第一電磁弁４ａを介し前記室外熱交換器５
の風上側のパス部５ａに高温の吐出ガスが注入され除霜
が行われるが、前記風下側のパス部５ｂの除霜は行われ
ない。Next, the operation of the present invention in the above configuration will be described. First, when the defrosting starts, the first solenoid valve 4
a is in an open state, and the second solenoid valve 4b is in an open state.
(ST1) Then, the outdoor heat exchanger 5 is connected via the first solenoid valve 4a.
The high-temperature discharge gas is injected into the leeward path portion 5a to perform defrosting, but the leeward path portion 5b is not defrosted.
【００２０】次いで、除霜開始からの経過時間ｔが、切
換設定時間ｔ１を超えないかどうか判断し、超えないと
きは、ｔ＜ｔ１でＮｏとなりこの判断を繰り返し、切換
設定時間ｔ１を超えると、ｔ＞ｔ１でＹｅｓとなり（Ｓ
Ｔ２）、前記第二電磁弁４ｂが、開状態となる。（ＳＴ
３） または、前記除霜回数カウンタ１６の回数Ｃｎが設定回
数Ｃ０を超えたかどうか判断し、超えないときは、Ｃｎ
＜Ｃ０でＮｏとなりこの判断を繰り返し、切換設定回数
Ｃ０を超えると、Ｃｎ＞Ｃ０でＹｅｓとなり（ＳＴ２
１）、前記第二電磁弁８ｂを開状態に制御するととも
に、前記除霜回数カウンタＣｎを零に戻している。この
とき、前記風上側のパス部５ａの除霜が進行するととも
に、前記第二電磁弁４ｂを介し前記風下側のパス部５ｂ
にも除霜が行われる。Next, it is determined whether or not the elapsed time t from the start of defrosting does not exceed the switching set time t1, and if not, the result is No at t <t1, and this determination is repeated. , T> t1 becomes Yes (S
T2) The second solenoid valve 4b is opened. (ST
3) Alternatively, it is determined whether the number of times Cn of the defrosting number counter 16 has exceeded the set number of times C0, and if not, Cn
<No in C0, this determination is repeated, and if the set number of switching times C0 is exceeded, Yes in Cn> C0 (ST2
1) The second solenoid valve 8b is controlled to be open, and the defrosting frequency counter Cn is returned to zero. At this time, the defrosting of the leeward pass portion 5a progresses, and the leeward pass portion 5b passes through the second solenoid valve 4b.
Defrosting is also performed.
【００２１】さらに、前記経過時間ｔが、所定時間ｔ２
を超えるかどうか判断し、超えないときは、ｔ＜ｔ２で
Ｎｏとなりこの判断を繰り返し、所定時間ｔ２を超える
と、ｔ＞ｔ２でＹｅｓとなり（ＳＴ４）、前記第一電磁
弁４ｂを閉状態とし除霜を完了する。（ＳＴ５） なお、同様なので図には示さないが、上述の他の実施例
に、前述の一実施例に示す前記温度センサ９の温度Ｔｃ
により前記第一電磁弁８ａ、第二電磁弁８ｂの開閉制御
を行ってもよい。また、同様なので図には示さないが、
前述の一実施例に、上述の他の実施例に示す前記タイマ
ー１５の経過時間ｔにより前記第一電磁弁８ａ、第二電
磁弁８ｂの開閉制御を行ってもよい。Further, the elapsed time t is equal to a predetermined time t2.
Is determined, and if not, the determination is No at t <t2, and this determination is repeated. If the predetermined time t2 is exceeded, the determination is Yes at t> t2 (ST4), and the first solenoid valve 4b is closed. Complete defrost. (ST5) Although not shown in the drawing because it is the same, the temperature Tc of the temperature sensor 9 shown in the above-mentioned one embodiment is different from that of the above-mentioned other embodiment.
The opening / closing control of the first solenoid valve 8a and the second solenoid valve 8b may be performed by the following. Also, although not shown in the figure because it is the same,
In this embodiment, the opening and closing control of the first solenoid valve 8a and the second solenoid valve 8b may be performed based on the elapsed time t of the timer 15 shown in the other embodiment.
【００２２】[0022]
【発明の効果】以上のように本発明によれば、圧縮機
と、四方弁と、２パスの室外熱交換器と、絞り装置と、
室内熱交換器とからなり、これらを冷媒配管により順次
配管接続して冷媒回路を構成するとともに、前記四方弁
を切換えることにより前記室外機の除霜を行う空気調和
機において、前記四方弁と前記室外熱交換器の間より分
岐し、同室外熱交換器の風上側のパス部とを側路により
接続する第一電磁弁と、前記分岐と前記室外熱交換器の
風下側のパス部とを側路により接続する第二電磁弁を配
設し、前記室外熱交換器の前記絞り装置側出口近傍の温
度を検出する温度センサを設け、除霜開始時に、前記第
一電磁弁を開状態、第二電磁弁を閉状態とし、前記温度
センサの検出温度が設定温度を超えたときに、前記第二
電磁弁を開状態とし、前記温度センサの検出温度が所定
温度を超えたときに、前記第一電磁弁及び、第二電磁弁
を閉状態に制御してなるようにした。この結果、放熱の
ロスを削減し、除霜時間を短縮した空気調和機の室外機
を提供することができる。As described above, according to the present invention, a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device,
An air conditioner comprising an indoor heat exchanger and sequentially connecting these with a refrigerant pipe to form a refrigerant circuit, and switching the four-way valve to defrost the outdoor unit, wherein the four-way valve and the A first solenoid valve that branches off from between the outdoor heat exchangers and connects a path section on the windward side of the outdoor heat exchanger by a bypass, and the branch and a path section on the leeward side of the outdoor heat exchanger. A second electromagnetic valve connected by a bypass is provided, and a temperature sensor for detecting a temperature near the outlet of the outdoor heat exchanger near the expansion device is provided.At the start of defrosting, the first electromagnetic valve is opened, When the second solenoid valve is closed, when the temperature detected by the temperature sensor exceeds a set temperature, the second solenoid valve is opened, and when the temperature detected by the temperature sensor exceeds a predetermined temperature, Control the first solenoid valve and the second solenoid valve to the closed state. It was as to become. As a result, it is possible to provide an outdoor unit of an air conditioner in which heat loss is reduced and defrosting time is reduced.
【図１】（ａ）は、本発明の一実施例を示す空気調和機
の冷媒回路図、（ｂ）は要部説明図、（ｃ）はフローチ
ャートである。FIG. 1A is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention, FIG. 1B is an explanatory diagram of a main part, and FIG. 1C is a flowchart.
【図２】（ａ）は、本発明の他の実施例を示す空気調和
機の冷媒回路図、（ｂ）は要部説明図、（ｃ）はフロー
チャートである。FIG. 2A is a refrigerant circuit diagram of an air conditioner showing another embodiment of the present invention, FIG. 2B is an explanatory diagram of a main part, and FIG. 2C is a flowchart.
【図３】（ａ）は、従来の一例を示す空気調和機の冷媒
回路図、（ｂ）は、要部説明図である。FIG. 3A is a refrigerant circuit diagram of an air conditioner showing an example of the related art, and FIG. 3B is an explanatory diagram of a main part.
【図４】（ａ）は、従来の他の例を示す空気調和機の冷
媒回路図、（ｂ）は、要部説明図である。FIG. 4A is a refrigerant circuit diagram of an air conditioner showing another example of the related art, and FIG. 4B is an explanatory diagram of a main part.
１ 室外機 ２ 圧縮機 ３ 四方弁 ４ 室外ファン ４ａ 第一電磁弁 ４ｂ 第二電磁弁 ５ 室外熱交換器 ５ａ 風上側のパス部 ５ｂ 風下側のパス部 ６ 絞り装置 ７ バイパス管 ８ａ 第一電磁弁 ８ｂ 第二電磁弁 ９ 温度センサ ９ａ 室外温度センサ １０ 室内機 １１ 室内熱交換器 １２ 入力部 １３ 制御部 １４ 記憶部 １５ タイマー １６ 除霜回数カウンタ DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Compressor 3 Four-way valve 4 Outdoor fan 4a First solenoid valve 4b Second solenoid valve 5 Outdoor heat exchanger 5a Upwind path section 5b Downwind path section 6 Throttling device 7 Bypass pipe 8a First solenoid valve 8b Second solenoid valve 9 Temperature sensor 9a Outdoor temperature sensor 10 Indoor unit 11 Indoor heat exchanger 12 Input unit 13 Control unit 14 Storage unit 15 Timer 16 Defrosting frequency counter
Claims (6)
換器と、絞り装置と、室内熱交換器とからなり、これら
を冷媒配管により順次配管接続して冷媒回路を構成し、
前記室外熱交換器に対向して配置された室外ファンを備
えるとともに、前記四方弁を切換えることにより前記室
外機の除霜を行う空気調和機において、 前記四方弁と前記室外熱交換器の間より分岐し、同室外
熱交換器の風上側のパス部とを側路により接続する第一
電磁弁と、前記分岐と前記室外熱交換器の風下側のパス
部とを側路により接続する第二電磁弁を配設し、 前記室外熱交換器の前記絞り装置側出口近傍の温度を検
出する温度センサを設け、除霜開始時に、前記第一電磁
弁を開状態、第二電磁弁を閉状態とし、 前記温度センサの検出温度が設定温度を超えたときに、
前記第二電磁弁を開状態とし、 前記温度センサの検出温度が所定温度を超えたときに、
前記第一電磁弁及び、第二電磁弁を閉状態に制御してな
ることを特徴とする空気調和機。1. A refrigerant circuit comprising a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger, which are sequentially connected by refrigerant piping to form a refrigerant circuit,
An air conditioner that includes an outdoor fan disposed to face the outdoor heat exchanger and performs defrosting of the outdoor unit by switching the four-way valve. A first solenoid valve that branches and connects the path on the leeward side of the outdoor heat exchanger by a bypass, and a second solenoid that connects the branch and the path on the leeward side of the outdoor heat exchanger by a bypass. An electromagnetic valve is provided, and a temperature sensor for detecting a temperature near the outlet of the outdoor heat exchanger near the expansion device is provided, and at the start of defrosting, the first electromagnetic valve is opened, and the second electromagnetic valve is closed. When the temperature detected by the temperature sensor exceeds a set temperature,
Open the second solenoid valve, when the temperature detected by the temperature sensor exceeds a predetermined temperature,
An air conditioner wherein the first solenoid valve and the second solenoid valve are controlled to close.
換器と、絞り装置と、室内熱交換器とからなり、これら
を冷媒配管により順次配管接続して冷媒回路を構成し、
前記室外熱交換器に対向して配置された室外ファンを備
えるとともに、前記四方弁を切換えることにより前記室
外機の除霜を行う空気調和機において、 前記四方弁と前記室外熱交換器の間より分岐し、同室外
熱交換器の風上側のパス部とを側路により接続する第一
電磁弁と、前記分岐と前記室外熱交換器の風下側のパス
部とを側路により接続する第二電磁弁を配設し、 前記除霜開始からの時間を計時するタイマーを設け、除
霜開始時に、前記第一電磁弁を開状態、第二電磁弁を閉
状態とし、 前記タイマーの計時時間が、切換設定時間を超えたとき
に、前記第二電磁弁を開状態とし、 前記タイマーの計時時間が、所定時間を超えたときに、
前記第一電磁弁及び、第二電磁弁を閉状態に制御してな
ることを特徴とする空気調和機。2. A refrigerant circuit comprising a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger, which are sequentially connected by refrigerant piping to form a refrigerant circuit,
An air conditioner that includes an outdoor fan disposed to face the outdoor heat exchanger and performs defrosting of the outdoor unit by switching the four-way valve. A first solenoid valve that branches and connects the path on the leeward side of the outdoor heat exchanger by a bypass, and a second solenoid that connects the branch and the path on the leeward side of the outdoor heat exchanger by a bypass. Disposing an electromagnetic valve, providing a timer to measure the time from the start of the defrost, at the start of defrost, the first solenoid valve is open, the second solenoid valve is closed, the timer time of the timer When the switching set time is exceeded, the second solenoid valve is opened, and when the time measured by the timer exceeds a predetermined time,
An air conditioner wherein the first solenoid valve and the second solenoid valve are controlled to close.
換器と、絞り装置と、室内熱交換器とからなり、これら
を冷媒配管により順次配管接続して冷媒回路を構成し、
前記室外熱交換器に対向して配置された室外ファンを備
えるとともに、前記圧縮機からの吐出ガスをバイパス管
を介して、前記室外熱交換器の前記絞り装置側に注入す
ることにより前記室外機の除霜を行う空気調和機におい
て、 前記圧縮機の吐出側と前記室外熱交換器の間より分岐
し、同室外熱交換器の風上側のパス部を側路により接続
する第一電磁弁と、前記分岐と前記室外熱交換器の風下
側のパス部とを側路により接続する第二電磁弁を配設
し、 前記室外熱交換器の前記四方弁側出口近傍の温度を検出
する温度センサを設け、除霜開始時に、前記第一電磁弁
を開状態、第二電磁弁を閉状態とし、 前記温度センサの検出温度が設定温度を超えたときに、
前記第二電磁弁を開状態とし、 前記温度センサの検出温度が所定温度を超えたときに、
前記第二電磁弁及び、第一電磁弁を閉状態に制御してな
ることを特徴とする空気調和機。3. A refrigerant circuit comprising a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger, which are sequentially connected by refrigerant piping to form a refrigerant circuit,
An outdoor fan disposed opposite to the outdoor heat exchanger, and a discharge gas from the compressor is injected into the outdoor heat exchanger via the bypass pipe into the expansion device side, thereby forming the outdoor unit. In the air conditioner that performs defrosting, a first solenoid valve that branches from between the discharge side of the compressor and the outdoor heat exchanger, and connects a windward path portion of the outdoor heat exchanger by a bypass. A second electromagnetic valve that connects the branch and a leeward path of the outdoor heat exchanger by a bypass, and a temperature sensor that detects a temperature near the four-way valve-side outlet of the outdoor heat exchanger. Provided, at the start of defrosting, the first solenoid valve is opened, the second solenoid valve is closed, when the temperature detected by the temperature sensor exceeds a set temperature,
Open the second solenoid valve, when the temperature detected by the temperature sensor exceeds a predetermined temperature,
An air conditioner wherein the second solenoid valve and the first solenoid valve are controlled to be in a closed state.
換器と、絞り装置と、室内熱交換器とからなり、これら
を冷媒配管により順次配管接続して冷媒回路を構成し、
前記室外熱交換器に対向して配置された室外ファンを備
えるとともに、前記圧縮機からの吐出ガスをバイパス管
を介して、前記室外熱交換器の前記絞り装置側に注入す
ることにより前記室外機の除霜を行う空気調和機におい
て、 前記圧縮機の吐出側と前記室外熱交換器の間より分岐
し、同室外熱交換器の風上側のパス部を側路により接続
する第一電磁弁と、前記分岐と前記室外熱交換器の風下
側のパス部とを側路により接続する第二電磁弁を配設
し、 前記除霜開始からの時間を計時するタイマーを設け、除
霜開始時に、前記第一電磁弁を開状態、第二電磁弁を閉
状態とし、 前記タイマーの計時時間が、切換設定時間を超えたとき
に、前記第二電磁弁を開状態を閉状態とし、 前記タイマーの計時時間が、所定時間を超えたときに、
前記第一電磁弁及び、第二電磁弁を閉状態に制御してな
ることを特徴とする空気調和機。4. A refrigerant circuit comprising a compressor, a four-way valve, a two-pass outdoor heat exchanger, a throttle device, and an indoor heat exchanger, which are sequentially connected by refrigerant piping to form a refrigerant circuit,
An outdoor fan disposed opposite to the outdoor heat exchanger, and a discharge gas from the compressor is injected into the outdoor heat exchanger via the bypass pipe into the expansion device side, thereby forming the outdoor unit. In the air conditioner that performs defrosting, a first solenoid valve that branches from between the discharge side of the compressor and the outdoor heat exchanger, and connects a windward path portion of the outdoor heat exchanger by a bypass. A second solenoid valve that connects the branch and the leeward path portion of the outdoor heat exchanger by a bypass is provided, and a timer that measures time from the start of the defrosting is provided. The first solenoid valve is in the open state, the second solenoid valve is in the closed state, and when the time measured by the timer exceeds the switching set time, the second solenoid valve is in the open state in the closed state, When the measured time exceeds the specified time,
An air conditioner wherein the first solenoid valve and the second solenoid valve are controlled to close.
室外温度センサの検出温度が設定温度未満のときに、前
記第二電磁弁を開状態に制御してなることを特徴とする
請求項１乃至請求項４記載の空気調和機。5. The outdoor unit is provided with an outdoor temperature sensor, and when the temperature detected by the outdoor temperature sensor is lower than a set temperature, the second solenoid valve is controlled to be in an open state. The air conditioner according to any one of claims 1 to 4.
同除霜回数カウンタの回数が設定回数を超えたときに、
前記第二電磁弁を開状態に制御するとともに、前記除霜
回数カウンタを零に戻してなることを特徴とする請求項
１乃至請求項４記載の空気調和機。6. The outdoor unit is provided with a defrost frequency counter,
When the number of times of the defrost counter exceeds the set number,
The air conditioner according to claim 1, wherein the second solenoid valve is controlled to be in an open state, and the defrost frequency counter is returned to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10108915A JPH11304309A (en) | 1998-04-20 | 1998-04-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10108915A JPH11304309A (en) | 1998-04-20 | 1998-04-20 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11304309A true JPH11304309A (en) | 1999-11-05 |
Family
ID=14496880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10108915A Pending JPH11304309A (en) | 1998-04-20 | 1998-04-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11304309A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064942A1 (en) * | 2002-01-29 | 2003-08-07 | Daikin Industries, Ltd. | Heat pump type water heater |
| JP2008039298A (en) * | 2006-08-07 | 2008-02-21 | Denso Corp | Heat pump cycle |
| US7883024B2 (en) | 2002-01-29 | 2011-02-08 | Daikin Industries, Ltd. | Heat pump type water heater |
| US20140083122A1 (en) * | 2012-09-24 | 2014-03-27 | Lg Electronics Inc. | Integral air conditioning system for heating and cooling |
| CN106871477A (en) * | 2017-03-13 | 2017-06-20 | 合肥美的暖通设备有限公司 | Defroster, source pump and its Defrost method |
| JPWO2021095124A1 (en) * | 2019-11-12 | 2021-05-20 |
-
1998
- 1998-04-20 JP JP10108915A patent/JPH11304309A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064942A1 (en) * | 2002-01-29 | 2003-08-07 | Daikin Industries, Ltd. | Heat pump type water heater |
| US7883024B2 (en) | 2002-01-29 | 2011-02-08 | Daikin Industries, Ltd. | Heat pump type water heater |
| JP2008039298A (en) * | 2006-08-07 | 2008-02-21 | Denso Corp | Heat pump cycle |
| US20140083122A1 (en) * | 2012-09-24 | 2014-03-27 | Lg Electronics Inc. | Integral air conditioning system for heating and cooling |
| KR20140039586A (en) * | 2012-09-24 | 2014-04-02 | 엘지전자 주식회사 | A united type system of air conditioning and cooling |
| US9599379B2 (en) * | 2012-09-24 | 2017-03-21 | Lg Electronics Inc. | Integral air conditioning system for heating and cooling |
| CN106871477A (en) * | 2017-03-13 | 2017-06-20 | 合肥美的暖通设备有限公司 | Defroster, source pump and its Defrost method |
| JPWO2021095124A1 (en) * | 2019-11-12 | 2021-05-20 | ||
| WO2021095124A1 (en) * | 2019-11-12 | 2021-05-20 | 三菱電機株式会社 | Refrigeration cycle device |
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