JPH1026435A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH1026435A JPH1026435A JP18242396A JP18242396A JPH1026435A JP H1026435 A JPH1026435 A JP H1026435A JP 18242396 A JP18242396 A JP 18242396A JP 18242396 A JP18242396 A JP 18242396A JP H1026435 A JPH1026435 A JP H1026435A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- refrigerant
- way valve
- indoor heat
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷房、暖房及び冷
媒再熱除湿の各運転を可能とする空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner capable of performing cooling, heating, and refrigerant reheating and dehumidification operations.
【０００２】[0002]
【従来の技術】従来の空気調和機において、冷房、暖房
及び冷媒再熱除湿の各運転を可能とするものとして実開
昭６２−５０４６４に記載されたものがある。これは図
７に記載したものであって、冷媒回路は圧縮機１０１、
四方弁１０２、１１２、水側熱交換器（室外熱交換器）
１０３、膨張弁（開度調整弁）１０４、逆止弁１０５、
１０８、１１０、キャピラリーブ１０７、空気側熱交換
器（室内熱交換器）１０６、再熱熱交換器１０９、アキ
ュームレータ１１１等から構成されており、各運転時に
おいて、冷媒は図示矢印のごとく流れる。2. Description of the Related Art A conventional air conditioner is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-50464 which enables each operation of cooling, heating and refrigerant reheat dehumidification. This is what is described in FIG. 7, and the refrigerant circuit is a compressor 101,
Four-way valves 102 and 112, water side heat exchanger (outdoor heat exchanger)
103, an expansion valve (opening adjustment valve) 104, a check valve 105,
108, 110, a capillary tube 107, an air-side heat exchanger (indoor heat exchanger) 106, a reheat heat exchanger 109, an accumulator 111, and the like. In each operation, the refrigerant flows as shown by arrows in the figure.
【０００３】即ち、冷房時には、冷媒を圧縮機１０１、
四方弁１０２、四方弁１１２、水側熱交換器１０３、逆
止弁１０５、キャピラリーブ１０７、空気側熱交換器１
０６、四方弁１０２、アキュームレータ１１１、圧縮機
１０１の経路で流し、空気側熱交換器１０６により室内
空気を冷却除湿し冷房を行う。また、暖房時には、四方
弁１０２を切り換えて、冷媒を圧縮機１０１、四方弁１
０２、空気側熱交換器１０６、逆止弁１０８、膨張弁１
０４、水側熱交換器１０３、四方弁１１２、四方弁１０
２、圧縮機１０１の経路で流し、凝縮器として作用する
空気側熱交換器により室内空気を加熱し暖房を行う。更
に、再熱除湿運転時には、四方弁１１２を切り換えて、
冷媒を圧縮機１０１、四方弁１０２、四方弁１１２、再
熱熱交換器１０９、逆止弁１１０の経路で流し、その後
一部冷媒をキャピラリーブ１０７、空気側熱交換器１０
６、四方弁１０２の経路で流し、また他の一部冷媒を膨
張弁１０４、水側熱交換器１０３、四方弁１１２の経路
で流し、前記一部の冷媒を合流してアキュームレータ１
１１を介し圧縮機１０１に戻す回路を構成する。而し
て、このサイクルでは、室内空気を空気側熱交換器１０
６で冷却除湿した後再熱熱交換器１０９で再熱し除湿運
転を行う。That is, at the time of cooling, the refrigerant is supplied to the compressor 101,
Four-way valve 102, four-way valve 112, water-side heat exchanger 103, check valve 105, capillary valve 107, air-side heat exchanger 1
06, the four-way valve 102, the accumulator 111, and the compressor 101 flow, and the indoor air is cooled and dehumidified by the air-side heat exchanger 106 to perform cooling. Further, at the time of heating, the four-way valve 102 is switched so that the refrigerant is supplied to the compressor 101 and the four-way valve 1.
02, air side heat exchanger 106, check valve 108, expansion valve 1
04, water side heat exchanger 103, four-way valve 112, four-way valve 10
2. The air flows in the path of the compressor 101 and is heated by heating the indoor air by an air-side heat exchanger acting as a condenser. Furthermore, at the time of reheat dehumidification operation, the four-way valve 112 is switched,
The refrigerant flows through the path of the compressor 101, the four-way valve 102, the four-way valve 112, the reheat heat exchanger 109, and the check valve 110, and then a part of the refrigerant flows into the capillary 107 and the air-side heat exchanger 10.
6. Flow through the path of the four-way valve 102, and flow another part of the refrigerant through the path of the expansion valve 104, the water-side heat exchanger 103, and the four-way valve 112.
A circuit for returning the signal to the compressor 101 via the power supply 11 is formed. In this cycle, the indoor air is supplied to the air-side heat exchanger 10.
After cooling and dehumidifying in step 6, the reheat heat exchanger 109 reheats and performs a dehumidifying operation.
【０００４】[0004]
【発明が解決しようとする課題】ところが、この従来の
空気調和機においては、上述の如く冷暖房に必要な熱交
換器以外に冷媒再熱除湿運転専用に再熱熱交換器１０９
を室内機に設ける必要があり、室内機が大きくなるとい
う問題があった。However, in this conventional air conditioner, in addition to the heat exchanger required for cooling and heating as described above, the reheat heat exchanger 109 dedicated to the refrigerant reheating and dehumidifying operation is used.
Needs to be provided in the indoor unit, and there is a problem that the indoor unit becomes large.
【０００５】この問題を解消する方式として、図８に記
載のものがある。この空気調和機は、再熱専用の熱交換
器を設けず、室内熱交換器を２分割し、冷媒を図示矢印
のごとく流すものである。即ち、該空気調和機は圧縮機
２０１、四方弁２０２、室外熱交換器２０４、電磁弁２
０３、開度調整弁２０５、２０７、室内熱交換器２０
６、２０８から構成されている。而して、冷房運転時
は、電磁弁２０３を全閉、開度調整弁２０７を全開と
し、また、開度調整弁２０５を絞り状態とし、四方弁２
０２を図示の位置として、冷媒を圧縮機２０１、四方弁
２０２、室外熱交換器２０４、開度調整弁２０５、室内
熱交換器２０６、開度調整弁２０７、室内熱交換器２０
８、四方弁２０２、圧縮機２０１の経路で流し、室内熱
交換器２０６及び２０８で室内空気を冷却除湿し冷房を
行う。また、暖房運転時は、開度調整弁２０７を全開、
電磁弁２０３を全閉とし、また、開度調整弁２０５を絞
り状態とし、四方弁２０２を切り換えて、冷媒を圧縮機
２０１、四方弁２０２、室内熱交換器２０８、開度調整
弁２０７、室内熱交換器２０６、開度調整弁２０５、室
外熱交換器２０４、四方弁２０２、圧縮機２０１の経路
で流し、凝縮器として作用する室内熱交換器２０８、２
０６で室内空気を加熱し暖房を行う。As a method for solving this problem, there is a method shown in FIG. This air conditioner does not provide a heat exchanger dedicated to reheating, divides the indoor heat exchanger into two parts, and allows the refrigerant to flow as shown by the arrows in the figure. That is, the air conditioner includes a compressor 201, a four-way valve 202, an outdoor heat exchanger 204, a solenoid valve 2
03, opening adjustment valves 205, 207, indoor heat exchanger 20
6, 208. Thus, during the cooling operation, the solenoid valve 203 is fully closed, the opening adjustment valve 207 is fully opened, and the opening adjustment valve 205 is in the throttled state.
02, the refrigerant is supplied to the compressor 201, the four-way valve 202, the outdoor heat exchanger 204, the opening adjustment valve 205, the indoor heat exchanger 206, the opening adjustment valve 207, and the indoor heat exchanger 20.
8. The air flows through the four-way valve 202 and the compressor 201, and the indoor air is cooled and dehumidified by the indoor heat exchangers 206 and 208 to perform cooling. During the heating operation, the opening degree adjustment valve 207 is fully opened,
The solenoid valve 203 is fully closed, the opening adjustment valve 205 is closed, and the four-way valve 202 is switched so that the refrigerant flows through the compressor 201, the four-way valve 202, the indoor heat exchanger 208, the opening adjustment valve 207, and the indoor. The heat is passed through the heat exchanger 206, the opening adjustment valve 205, the outdoor heat exchanger 204, the four-way valve 202, and the compressor 201, and the indoor heat exchangers 208 and 2 function as condensers.
At 06, the room air is heated to perform heating.
【０００６】また、冷媒再熱除湿運転時には、開度調整
弁２０５を全閉、電磁弁２０３を全開とし、また開度調
整弁２０７を絞り、四方弁２０２を図示の位置（冷房サ
イクルの位置）として、冷媒を圧縮機２０１、電磁弁２
０３、室内熱交換器２０６、開度調整弁２０７、室内熱
交換器２０８、四方弁２０２、圧縮機２０１の経路で流
し、室内空気を室内熱交換器２０８で冷却除湿し、室内
熱交換器２０６で再熱し除湿運転を行う。During the refrigerant reheat dehumidifying operation, the opening adjustment valve 205 is fully closed, the solenoid valve 203 is fully opened, the opening adjustment valve 207 is throttled, and the four-way valve 202 is moved to the illustrated position (the position of the cooling cycle). The refrigerant is supplied to the compressor 201 and the solenoid valve 2
03, the indoor heat exchanger 206, the opening adjustment valve 207, the indoor heat exchanger 208, the four-way valve 202, and the compressor 201, and the indoor air is cooled and dehumidified by the indoor heat exchanger 208. To perform dehumidification operation.
【０００７】従って、室内熱交換器に再熱専用の熱交換
器を用いる必要はないが、この空気調和機の場合には、
冷媒再熱除湿運転時に、室外熱交換器２０４の一端が高
圧側に連通され、他端が閉鎖された状態となるため、冷
媒が室内熱交換器で凝縮液化し液冷媒が貯留する。この
ため循環に必要な冷媒量が不足するという問題がある。Therefore, it is not necessary to use a heat exchanger dedicated to reheating as the indoor heat exchanger, but in the case of this air conditioner,
During the refrigerant reheating and dehumidifying operation, one end of the outdoor heat exchanger 204 is connected to the high pressure side and the other end is closed, so that the refrigerant is condensed and liquefied in the indoor heat exchanger and the liquid refrigerant is stored. Therefore, there is a problem that the amount of refrigerant required for circulation is insufficient.
【０００８】本発明は、このような従来の技術に存在す
る問題点に鑑みなされたもので、その目的とするところ
は、再熱専用の熱交換器を設けずに冷媒再熱除湿運転が
可能であって、かつ、冷媒量不足が生じない空気調和機
を提供することにある。[0008] The present invention has been made in view of the problems existing in the prior art as described above. It is an object of the present invention to enable a refrigerant reheat dehumidification operation without providing a heat exchanger dedicated to reheat. Another object of the present invention is to provide an air conditioner that does not cause a shortage of the refrigerant amount.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明では、圧縮機、冷暖房切換用四
方弁、室外熱交換器、第１開度調整弁、室内熱交換器を
順次接続して冷暖房運転可能とした空気調和機におい
て、前記室内熱交換器を２分割して、前記第１開度調整
弁側を第１室内熱交換器、前記圧縮機側を第２室内熱交
換器とし、該第１室内熱交換器と第２室内熱交換器との
間に第２開度調整弁を設け、該第２開度調整弁の開度調
整を伴って、前記２分割した室内熱交換器の何れか一方
の室内熱交換器を蒸発器として、他方を再熱熱交換器と
して作用せしめて冷媒再熱除湿運転可能とするととも
に、該冷媒再熱除湿運転時に冷媒循環経路から前記室外
熱交換器を分離する分離回路を形成してなるものであ
る。According to the first aspect of the present invention, a compressor, a four-way valve for switching between cooling and heating, an outdoor heat exchanger, a first opening adjustment valve, and an indoor heat exchanger are provided. Are sequentially connected, the indoor heat exchanger is divided into two, the first opening adjustment valve side is a first indoor heat exchanger, and the compressor side is a second indoor heat exchanger. A heat exchanger, wherein a second opening adjustment valve is provided between the first indoor heat exchanger and the second indoor heat exchanger, and with the opening adjustment of the second opening adjustment valve, One of the indoor heat exchangers as an evaporator and the other as a reheat heat exchanger to enable the refrigerant reheat dehumidification operation, and a refrigerant circulation path during the refrigerant reheat dehumidification operation. And a separation circuit for separating the outdoor heat exchanger from the heat exchanger.
【００１０】また、請求項２に記載の発明では、前記冷
暖房用四方弁を冷房運転時の状態及び暖房運転時の状態
何れにおいても冷媒再熱除湿運転可能としたものであ
る。Further, in the invention described in claim 2, the four-way cooling / heating valve can be operated to reheat and dehumidify the refrigerant in both the state during the cooling operation and the state during the heating operation.
【００１１】また、請求項３に記載の発明では、前記冷
暖房切換用四方弁と前記室外熱交換器とを接続する配管
と、前記第１開度調整弁と前記室内熱交換器間とを接続
する配管とに跨がって四方弁を介裝し、該四方弁の切換
により前記分離回路を形成してなるものである。Further, in the invention according to claim 3, a pipe connecting the four-way valve for switching between cooling and heating and the outdoor heat exchanger, and a connection between the first opening adjustment valve and the indoor heat exchanger are connected. A four-way valve is provided so as to straddle the pipe to be connected, and the separation circuit is formed by switching the four-way valve.
【００１２】また、請求項４に記載の発明では、前記冷
暖房切換用四方弁と前記室外熱交換器とを接続する配管
に三方弁を設け、該三方弁を介して前記室外熱交換器及
び前記第１開度調整弁をバイパスするバイパス回路を設
け、該三方弁を切換るとともに前記第１開度調整弁を全
閉とすることにより前記分離回路を形成してなるもので
ある。Further, in the invention according to claim 4, a three-way valve is provided in a pipe connecting the four-way valve for switching between cooling and heating and the outdoor heat exchanger, and the outdoor heat exchanger and the outdoor heat exchanger are provided via the three-way valve. A bypass circuit for bypassing the first opening adjustment valve is provided, and the separation circuit is formed by switching the three-way valve and fully closing the first opening adjustment valve.
【００１３】また、請求項５に記載の発明では、前記冷
暖房切換用四方弁と前記室外熱交換器とを接続する配管
に第１三方弁を設けるとともに前記第１開度調整弁と前
記室内熱交換器とを接続する配管に第２三方弁を設け、
該第１三方弁と第２三方弁との間に前記室外熱交換器及
び前記第１開度調整弁をバイパスするバイパス回路を設
け、前記第１三方弁及び前記第２三方弁の切換により前
記分離回路を形成してなるものである。Further, in the invention described in claim 5, a first three-way valve is provided in a pipe connecting the four-way valve for switching between cooling and heating and the outdoor heat exchanger, and the first opening adjustment valve and the indoor heat exchanger are provided. A second three-way valve is provided in the pipe connecting the exchanger,
A bypass circuit that bypasses the outdoor heat exchanger and the first opening adjustment valve is provided between the first three-way valve and the second three-way valve, and the first three-way valve and the second three-way valve are switched by switching the first three-way valve and the second three-way valve; A separation circuit is formed.
【００１４】また、請求項６に記載の発明では、前記第
１及び第２室内熱交換器を異容量としたものである。In the invention according to claim 6, the first and second indoor heat exchangers have different capacities.
【００１５】また、請求項７に記載の発明では、冷媒再
熱除湿運転時の冷媒循環経路の低圧側回路と前記分離回
路との間に開閉弁を有する冷媒戻し回路を設けてなるも
のである。In the invention according to claim 7, a refrigerant return circuit having an on-off valve is provided between the low pressure side circuit of the refrigerant circulation path during the refrigerant reheating and dehumidifying operation and the separation circuit. .
【００１６】従って、請求項１記載の空気調和機におい
ては、２分割した室内熱交換器の一方を蒸発器とし他方
を再熱熱交換器とするので、再熱熱交換器専用のスペー
スを室内機内に設ける必要がない。併せて、冷媒再熱除
湿運転時、熱交換器として作用させる必要の無い室外熱
交換器が冷媒循環経路から分離され、該室外熱交換器に
回路内の冷媒が溜まり込むという現象が発生しない。ま
た、請求項２記載の空気調和機においては、冷媒再熱除
湿運転時、二つの四方弁の切換により、冷暖房用四方弁
を冷房運転時の状態として第１室内熱交換器を再熱熱交
換器として作用させ、第２室内熱交換器を蒸発器として
作用させる冷房サイクルによる冷媒再熱除湿運転、或い
は、冷暖房用四方弁を暖房運転時の状態として第１室内
熱交換器を蒸発器として作用させ、第２室内熱交換器を
再熱熱交換器として作用させる暖房サイクルによる冷媒
再熱除湿運転何れにおいても運転可能としている。Therefore, in the air conditioner according to the first aspect, one of the two divided indoor heat exchangers is an evaporator and the other is a reheat heat exchanger, so that a space dedicated to the reheat heat exchanger is provided. There is no need to install it on board. In addition, during the refrigerant reheat dehumidifying operation, the outdoor heat exchanger that does not need to function as a heat exchanger is separated from the refrigerant circulation path, and the phenomenon that the refrigerant in the circuit accumulates in the outdoor heat exchanger does not occur. In the air conditioner according to the second aspect, during the refrigerant reheating and dehumidifying operation, the two indoor four-way valves are switched so that the four-way valve for cooling and heating is in the state of the cooling operation, and the first indoor heat exchanger is reheat-exchanged. The first indoor heat exchanger acts as an evaporator with the refrigerant reheat dehumidifying operation by a cooling cycle in which the second indoor heat exchanger acts as an evaporator, or the four-way valve for cooling and heating is in the heating operation when the second indoor heat exchanger acts as an evaporator. Thus, the operation can be performed in any of the refrigerant reheating and dehumidifying operations by the heating cycle in which the second indoor heat exchanger acts as a reheat heat exchanger.
【００１７】また、請求項３記載の空気調和機において
は、冷媒再熱除湿運転時、二つの四方弁の切換により、
室外熱交換器を冷媒循環経路から分離され、室外熱交換
器への冷媒の溜まり込みが防止される。また、請求項４
記載の空気調和機においては、冷媒再熱除湿運転時、三
方弁の切換と第１開度調整弁の閉成により、室外熱交換
器が冷媒循環経路から分離され、該室外熱交換器への冷
媒溜まり込みが防止される。また、請求項５記載の空気
調和機においては、冷媒再熱除湿運転時、二つの三方弁
の切換により、室外熱交換器が冷媒循環経路から分離さ
れ、該室外熱交換器への冷媒溜まり込みが防止される。Further, in the air conditioner according to the third aspect, the two four-way valves are switched during the refrigerant reheating and dehumidifying operation.
The outdoor heat exchanger is separated from the refrigerant circulation path, and the accumulation of the refrigerant in the outdoor heat exchanger is prevented. Claim 4
In the air conditioner described, at the time of the refrigerant reheat dehumidification operation, the outdoor heat exchanger is separated from the refrigerant circulation path by switching the three-way valve and closing the first opening degree adjustment valve, and the outdoor heat exchanger is connected to the outdoor heat exchanger. Refrigerant accumulation is prevented. In the air conditioner according to the fifth aspect, during the refrigerant reheating and dehumidifying operation, the outdoor heat exchanger is separated from the refrigerant circulation path by switching between the two three-way valves, and the refrigerant accumulates in the outdoor heat exchanger. Is prevented.
【００１８】また、請求項６記載の空気調和機において
は、２分割した室内熱交換器を異容量とすることによ
り、冷房気味除湿運転或いは暖房気味除湿運転の選択が
可能となる。また、請求項７記載の空気調和機において
は、請求項１の作用に加え、分離された室内熱交換器を
含む回路が冷媒循環経路の低圧側と連通されるため、冷
媒循環経路切換時に溜まっていた液冷媒が冷媒循環経路
内に回収されるため、冷媒回路に充填する冷媒量をより
低減することができる。In the air conditioner according to the sixth aspect, by making the indoor heat exchanger divided into two parts of different capacities, it is possible to select a cooling dehumidifying operation or a heating dehumidifying operation. In the air conditioner according to the seventh aspect, in addition to the operation of the first aspect, since the circuit including the separated indoor heat exchanger is communicated with the low pressure side of the refrigerant circulation path, the circuit accumulates when the refrigerant circulation path is switched. Since the liquid refrigerant that has been collected is recovered in the refrigerant circulation path, the amount of refrigerant charged into the refrigerant circuit can be further reduced.
【００１９】[0019]
（第１の実施の形態）以下本発明を空気調和機に具体化
した第１の実施の形態ついて図１に基づき説明する。図
１は、第１の実施の形態の冷凍サイクルであって、この
冷凍サイクルは圧縮機１、冷暖房用四方弁２、室外熱交
換器４、第１開度調整弁５（第１及び第２室内熱交換器
６、８を順次接続して冷暖房可能としたサイクルを基本
冷凍サイクルとする。そして、該冷凍サイクルに対し室
内熱交換器を第１室内熱交換器６及び第２室内熱交換器
８に２分割し、該第１室内熱交換器６と第２室内熱交換
器８との間に第２開度調整弁７を介装し、前記第１開度
調整弁５及び第２開度調整弁７の開度調整により再熱除
湿運転可能な冷凍サイクルを構成する。更に、冷暖房用
四方弁２と室外熱交換器４とを接続する配管と、第１開
度調整弁５と第１室内熱交換器６とを接続する配管とに
跨がって四方弁３を配設し、前記冷暖房用四方弁２と四
方弁３との切換により、冷媒を図面に記した各矢印の如
く流して、冷房運転、暖房運転、冷房サイクルによる冷
媒再熱除湿運転及び暖房サイクルによる冷媒再熱除湿運
転を可能とするとともに、冷媒再熱除湿運転時には、室
外熱交換器４を冷媒流通経路から分離させる如く構成し
たものである。尚、室内熱交換器において室内空気は図
面における一点鎖線の経路で流通させている。(First Embodiment) A first embodiment in which the present invention is embodied in an air conditioner will be described below with reference to FIG. FIG. 1 shows a refrigeration cycle according to a first embodiment. The refrigeration cycle includes a compressor 1, a four-way valve 2 for cooling and heating, an outdoor heat exchanger 4, and a first opening adjustment valve 5 (first and second opening control valves). A cycle in which the indoor heat exchangers 6 and 8 are sequentially connected to enable cooling and heating is defined as a basic refrigeration cycle, and the indoor heat exchanger for the refrigeration cycle is a first indoor heat exchanger 6 and a second indoor heat exchanger. 8, a second opening adjustment valve 7 is interposed between the first indoor heat exchanger 6 and the second indoor heat exchanger 8, and the first opening adjustment valve 5 and the second opening A refrigeration cycle capable of reheating and dehumidifying operation is configured by adjusting the opening of the degree adjusting valve 7. Further, a pipe connecting the four-way valve for cooling and heating 2 and the outdoor heat exchanger 4, a first opening degree adjusting valve 5, A four-way valve 3 is provided so as to straddle a pipe connecting the one indoor heat exchanger 6, and switching between the four-way valve 2 for cooling and heating and the four-way valve 3 is performed. By flowing the refrigerant as shown by the arrows in the drawing, the cooling operation, the heating operation, the refrigerant reheat dehumidification operation by the cooling cycle and the refrigerant reheat dehumidification operation by the heating cycle are enabled, and at the time of the refrigerant reheat dehumidification operation The outdoor heat exchanger 4 is configured to be separated from the refrigerant flow path.In the indoor heat exchanger, the indoor air is circulated along a dashed line in the drawing.
【００２０】即ち、冷房運転時は、四方弁２を図示のご
とき切換位置とし、四方弁３を図示位置から切り換え、
第１開度調整弁５を絞り状態とし、第２開度調整弁７を
全開状態として、圧縮機１、四方弁２、四方弁３、室外
熱交換器４、第１開度調整弁５、四方弁３、第１室内熱
交換器６、第２開度調整弁７、第２室内熱交換器８、四
方弁２、圧縮機１の冷媒循環経路を構成する。斯かる冷
媒循環経路において、圧縮機１から吐出された高温高圧
の冷媒は、室外熱交換器４で凝縮液化し、第１開度調整
弁５で低圧２相状態に変化し、第１及び第２室内熱交換
器６、８で２段階に室内空気を冷却除湿して気化し、圧
縮機１に戻る。That is, during the cooling operation, the four-way valve 2 is set to the switching position as shown, and the four-way valve 3 is switched from the illustrated position.
The first opening adjustment valve 5 is set to the throttled state, the second opening adjustment valve 7 is set to the fully opened state, and the compressor 1, the four-way valve 2, the four-way valve 3, the outdoor heat exchanger 4, the first opening adjustment valve 5, The four-way valve 3, the first indoor heat exchanger 6, the second opening adjustment valve 7, the second indoor heat exchanger 8, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 is condensed and liquefied in the outdoor heat exchanger 4, changed to a low-pressure two-phase state by the first opening degree adjustment valve 5, and changed to a first and a second state. The indoor air is cooled and dehumidified and vaporized in two stages by the two indoor heat exchangers 6 and 8, and returns to the compressor 1.
【００２１】暖房運転時は、冷房運転時の状態から四方
弁２のみを切り換えて、圧縮機１、四方弁２、第２室内
熱交換器８、第２開度調整弁７、第１室内熱交換器６、
四方弁３、第１開度調整弁５、室外熱交換器４、四方弁
３、四方弁２、圧縮機１の冷媒循環経路を構成する。斯
かる冷媒循環経路において、圧縮機１から吐出された高
温高圧の冷媒は、第１及び第２室内熱交換器６、８で２
段階に室内空気を加熱し、冷媒自身は冷却され、凝縮液
化し、第１開度調整弁５で低圧２相状態に変化し、室外
熱交換器４で蒸発気化し、圧縮機１に戻る。During the heating operation, only the four-way valve 2 is switched from the state during the cooling operation, and the compressor 1, the four-way valve 2, the second indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat Exchanger 6,
The four-way valve 3, the first opening adjustment valve 5, the outdoor heat exchanger 4, the four-way valve 3, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 passes through the first and second indoor heat exchangers 6 and 8,
The indoor air is heated in a stage, the refrigerant itself is cooled, condensed and liquefied, changed to a low-pressure two-phase state by the first opening degree adjustment valve 5, vaporized and vaporized by the outdoor heat exchanger 4, and returned to the compressor 1.
【００２２】冷房サイクルによる冷媒再熱除湿運転は、
四方弁２を冷房運転時の状態とし、四方弁３を図示位置
とし、第２開度調整弁７を絞り状態として、圧縮機１、
四方弁２、四方弁３、第１室内熱交換器６、第２開度調
整弁７、第２室内熱交換器８、四方弁２、圧縮機１の冷
媒循環経路を構成して行う。斯かる冷媒循環経路におい
て、圧縮機１から吐出された冷媒は、第１室内熱交換器
６で室内空気を再熱（第２室内熱交換器８で冷却除湿さ
れた室内空気を加熱）して凝縮液化し、第２開度調整弁
７で低圧２相状態に変化し、第２室内熱交換器８で室内
空気を冷却除湿して蒸発気化し、圧縮機１に戻る。従っ
て、室内空気は第２室内熱交換器８で冷却除湿され、第
１室内熱交換器６で再熱されるので、温度は大きく変化
せず除湿されることになり所謂除湿運転が行われること
になる。The refrigerant reheating and dehumidifying operation by the cooling cycle is as follows.
The four-way valve 2 is set to the state at the time of the cooling operation, the four-way valve 3 is set to the illustrated position, and the second opening adjustment valve 7 is set to the throttled state.
The four-way valve 2, the four-way valve 3, the first indoor heat exchanger 6, the second opening adjustment valve 7, the second indoor heat exchanger 8, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 reheats the indoor air in the first indoor heat exchanger 6 (heats the indoor air cooled and dehumidified in the second indoor heat exchanger 8). The condensed and liquefied liquid is changed to a low-pressure two-phase state by the second opening adjustment valve 7, and the room air is cooled and dehumidified by the second indoor heat exchanger 8 to evaporate and return to the compressor 1. Therefore, the indoor air is cooled and dehumidified in the second indoor heat exchanger 8 and reheated in the first indoor heat exchanger 6, so that the temperature is not greatly changed and dehumidified, so that a so-called dehumidifying operation is performed. Become.
【００２３】次に、暖房サイクルによる冷媒再熱除湿運
転は、四方弁２を暖房運転時の状態とし、四方弁３を図
示位置とし、第２開度調整弁７を絞り状態として、圧縮
機１、四方弁２、第２室内熱交換器８、第２開度調整弁
７、第１室内熱交換器６、四方弁２、四方弁３、圧縮機
１の冷媒循環経路を構成して行う。斯かる冷媒循環経路
において、圧縮機１から吐出された冷媒は、第２室内熱
交換器８で室内空気を加熱して凝縮液化し、第２開度調
整弁７で低圧２相状態に変化し、第１室内熱交換器８で
加熱された室内空気を冷却除湿して蒸発気化し、圧縮機
１に戻る。従って、室内空気は室内熱交換器８で先ず加
熱され、次いで室内熱交換器６で冷却除湿されるので、
温度は大きく変化せず除湿されることになり所謂除湿運
転が行われることになる。Next, in the refrigerant reheat dehumidifying operation by the heating cycle, the four-way valve 2 is set to the state of the heating operation, the four-way valve 3 is set to the illustrated position, the second opening adjustment valve 7 is set to the throttled state, and the compressor 1 , The four-way valve 2, the second indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat exchanger 6, the four-way valve 2, the four-way valve 3, and the refrigerant circulation path of the compressor 1. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 heats the indoor air in the second indoor heat exchanger 8 to be condensed and liquefied, and changes to a low-pressure two-phase state in the second opening adjustment valve 7. Then, the indoor air heated by the first indoor heat exchanger 8 is cooled and dehumidified to evaporate and return to the compressor 1. Therefore, the indoor air is first heated in the indoor heat exchanger 8 and then cooled and dehumidified in the indoor heat exchanger 6,
The temperature is not largely changed and dehumidification is performed, so that a so-called dehumidification operation is performed.
【００２４】以上のごとく本冷凍サイクルは冷房運転、
暖房運転、冷房サイクルによる冷媒再熱除湿運転及び暖
房サイクルによる冷媒再熱除湿運転が行える。また、再
熱熱交換器は室内熱交換器の一部であるから、前記実開
昭６２−５０４６４の如く専用の再熱熱交換器を用いて
いないので室内機に余分のスペースを必要としない。ま
た、上記両冷媒再熱除湿運転においては、室外熱交換器
４は四方弁３により冷媒循環経路から分離された分離回
路を構成しているので、分離されたときに含まれていた
冷媒以上には、冷媒回路内の冷媒が該室外熱交換器４に
入ることはなく、従って、該室内熱交換器４に冷媒が必
要以上に溜まり込むことはない。また、該冷凍サイクル
において、室内熱交換器６及び８の容量を異ならしめる
と、冷房サイクルによる冷媒再熱除湿運転とするか、暖
房サイクルによる冷媒再熱除湿運転とするかにより、冷
房気味除湿運転にしたり、暖房気味除湿運転としたりす
ることができる。As described above, the present refrigeration cycle operates in the cooling mode,
Heating operation, refrigerant reheat dehumidification operation by a cooling cycle, and refrigerant reheat dehumidification operation by a heating cycle can be performed. Further, since the reheat heat exchanger is a part of the indoor heat exchanger, no special reheat heat exchanger is used as in the above-mentioned Japanese Utility Model Application Laid-Open No. 62-50464, so that no extra space is required for the indoor unit. . Further, in the above-mentioned refrigerant reheat dehumidifying operation, the outdoor heat exchanger 4 constitutes a separation circuit separated from the refrigerant circulation path by the four-way valve 3, so that the outdoor heat exchanger 4 is more than the refrigerant contained when separated. Does not allow the refrigerant in the refrigerant circuit to enter the outdoor heat exchanger 4, so that the refrigerant does not accumulate in the indoor heat exchanger 4 more than necessary. Further, in the refrigeration cycle, when the capacities of the indoor heat exchangers 6 and 8 are different, depending on whether the refrigerant reheat dehumidification operation by the cooling cycle or the refrigerant reheat dehumidification operation by the heating cycle, the cooling dehumidification operation is performed. Or a heating mode dehumidifying operation.
【００２５】また、空気調和機を長時間停止している
と、冷媒が室外熱交換器４に溜まり込むことがある、ま
た、冷房運転後或いは暖房運転後においては、室外熱交
換器４に冷媒がかなり溜まっているので、この冷媒を冷
媒再熱除湿運転に有効に使うべく回収することは冷媒回
路内に充填する冷媒量を低減する上では好ましいことで
ある。この回収を行うには、冷媒再熱除湿運転直前に、
所定時間又は図示せぬ低圧スイッチが作動するまで該第
１開度調整弁５を閉塞して暖房運転を行い、その後に四
方弁３を冷媒再熱除湿運転時の状態に切り換えると（冷
房サイクルによる冷媒再熱除湿運転を行う場合は四方弁
２を冷房運転時の状態にする必要がある）、室外熱交換
器４内の冷媒を完全に回収することができる。When the air conditioner has been stopped for a long time, the refrigerant may accumulate in the outdoor heat exchanger 4. Also, after the cooling operation or the heating operation, the refrigerant is stored in the outdoor heat exchanger 4. Therefore, it is preferable to recover the refrigerant so as to be effectively used in the refrigerant reheating and dehumidifying operation in order to reduce the amount of the refrigerant charged in the refrigerant circuit. To perform this recovery, immediately before the refrigerant reheating and dehumidifying operation,
When the heating operation is performed by closing the first opening adjustment valve 5 for a predetermined time or until a low-pressure switch (not shown) is operated, and then the four-way valve 3 is switched to the state of the refrigerant reheat dehumidification operation (by the cooling cycle). When performing the refrigerant reheating and dehumidifying operation, the four-way valve 2 needs to be in the state of the cooling operation), and the refrigerant in the outdoor heat exchanger 4 can be completely recovered.
【００２６】（第２の実施の形態）次に、図２に基づき
第２の実施の形態について説明する。尚、同図において
図１と同一の符号は同一の機器を示す。また、室内空気
の流れは図１に同じである。この第２の実施の形態は、
図２に示すように、第１の実施の形態において、室外熱
交換器４内の冷媒を、冷媒再熱除湿運転をしながら冷媒
循環経路の低圧側に戻す戻し回路２０を付加したもので
ある。即ち、図２において、第１開度調整弁５と四方弁
３とを接続する配管（分離回路の一部分）から、圧縮機
１の吸入側配管へ二方弁２１を介装する戻し回路２０を
付加したもので、他は図１の第１の実施の形態と同一で
ある。(Second Embodiment) Next, a second embodiment will be described with reference to FIG. Note that the same reference numerals in FIG. 1 as those in FIG. 1 denote the same devices. The flow of room air is the same as in FIG. In this second embodiment,
As shown in FIG. 2, in the first embodiment, a return circuit 20 for returning the refrigerant in the outdoor heat exchanger 4 to the low pressure side of the refrigerant circulation path while performing the refrigerant reheating and dehumidifying operation is added. . That is, in FIG. 2, a return circuit 20 that interposes a two-way valve 21 from a pipe (a part of the separation circuit) connecting the first opening adjustment valve 5 and the four-way valve 3 to a suction-side pipe of the compressor 1 is provided. The other components are the same as those of the first embodiment shown in FIG.
【００２７】而して、該二方弁２１は、冷房運転時及び
暖房運転時は全閉としておき、冷媒再熱除湿運転時に開
放する。従って、冷媒再熱除湿運転時、室外熱交換器４
は冷媒循環経路の低圧側に連通され、該室外熱交換器４
内に溜まっていた冷媒は、冷媒循環経路に回収され、冷
媒量の不足を生じたりすることがない。The two-way valve 21 is fully closed during the cooling operation and the heating operation, and is opened during the refrigerant reheating and dehumidifying operation. Therefore, during the refrigerant reheat dehumidification operation, the outdoor heat exchanger 4
Is connected to the low pressure side of the refrigerant circulation path, and the outdoor heat exchanger 4
The refrigerant accumulated in the inside is recovered in the refrigerant circulation path, and there is no shortage of the refrigerant amount.
【００２８】（第３の実施の形態）次に、図３に基づき
第３の実施の形態について説明する。尚、同図において
図１と同一の符号は同一の機器を示す。また、室内空気
の流れは図１に同じである。この実施の形態は、図１の
第１の実施の形態と比較すると、第１の実施の形態にお
いては四方弁３により前記室外熱交換器４を含む分離回
路を構成していたが、この四方弁３を三方弁３３に代
え、更に第１開度調整弁５をこれに兼用せしめた点で相
違する。即ち、図３において、室外熱交換器４は三方弁
３３を介し四方弁２に接続され、そして、この三方弁３
３と、第１開度調整弁５と第１室内熱交換器６とを接続
する配管との間に、室外熱交換器４及び第１開度調整弁
５をバイパスするバイパス回路３４が形成される。而し
て、冷房運転、暖房運転及び冷媒再熱除湿運転時の冷媒
流れは図面に記した矢印の通である。(Third Embodiment) Next, a third embodiment will be described with reference to FIG. Note that the same reference numerals in FIG. 1 as those in FIG. 1 denote the same devices. The flow of room air is the same as in FIG. In this embodiment, as compared with the first embodiment shown in FIG. 1, in the first embodiment, the separation circuit including the outdoor heat exchanger 4 is constituted by the four-way valve 3. The difference is that the valve 3 is replaced with a three-way valve 33, and the first opening degree adjustment valve 5 is also used as this. That is, in FIG. 3, the outdoor heat exchanger 4 is connected to the four-way valve 2 via the three-way valve 33, and the three-way valve 3
3, a bypass circuit 34 that bypasses the outdoor heat exchanger 4 and the first opening adjustment valve 5 is formed between a pipe connecting the first opening adjustment valve 5 and the first indoor heat exchanger 6. You. The flow of the refrigerant during the cooling operation, the heating operation, and the refrigerant reheating and dehumidifying operation is as indicated by the arrows in the drawing.
【００２９】即ち、冷房運転時は、四方弁２を図示のご
とき切換位置とし、三方弁３３を図示位置から切り換
え、第１開度調整弁５を絞り状態にし、第２開度調整弁
７を全開として、圧縮機１、四方弁２、三方弁３３、室
外熱交換器４、第１開度調整弁５、第１室内熱交換器
６、第２開度調整弁７、第２室内熱交換器８、四方弁
２、圧縮機１の冷媒循環経路を構成する。斯かる冷媒循
環経路において、圧縮機１から吐出された高温高圧の冷
媒は、室外熱交換器４で凝縮液化し、第１開度調整弁５
で低圧２相状態に変化し、第１及び第２室内熱交換器
６、８で室内空気を冷却除湿して気化し、圧縮機１に戻
る。That is, during the cooling operation, the four-way valve 2 is set to the switching position as shown, the three-way valve 33 is switched from the illustrated position, the first opening adjustment valve 5 is set to the throttle state, and the second opening adjustment valve 7 is set to the switching position. As fully opened, the compressor 1, the four-way valve 2, the three-way valve 33, the outdoor heat exchanger 4, the first opening adjustment valve 5, the first indoor heat exchanger 6, the second opening adjustment valve 7, the second indoor heat exchange The refrigerant circulation path of the compressor 8, the four-way valve 2, and the compressor 1 is configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 is condensed and liquefied in the outdoor heat exchanger 4, and the first opening degree control valve 5
, And the indoor air is cooled and dehumidified and vaporized by the first and second indoor heat exchangers 6 and 8, and returns to the compressor 1.
【００３０】暖房運転時は、冷房運転時の状態から四方
弁２のみを切り換えて、圧縮機１、四方弁２、第２室内
熱交換器８、第２開度調整弁７、第１室内熱交換器６、
第１開度調整弁５、室外熱交換器４、三方弁３３、四方
弁２、圧縮機１の冷媒循環経路を構成する。斯かる冷媒
循環経路において、圧縮機１から吐出された高温高圧の
冷媒は、第１及び第２室内熱交換器６、８で室内空気を
加熱し、冷媒自身は冷却され、凝縮液化し、第１開度調
整弁５で低圧２相状態に変化し、室外熱交換器４で蒸発
気化し、圧縮機１に戻る。During the heating operation, only the four-way valve 2 is switched from the state during the cooling operation, and the compressor 1, the four-way valve 2, the second indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat Exchanger 6,
The first opening adjustment valve 5, the outdoor heat exchanger 4, the three-way valve 33, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 heats the indoor air in the first and second indoor heat exchangers 6 and 8, and the refrigerant itself is cooled and condensed and liquefied. The state is changed to the low-pressure two-phase state by the one-degree-of-opening adjustment valve 5, vaporized and vaporized by the outdoor heat exchanger 4, and returned to the compressor 1.
【００３１】冷房サイクルによる冷媒再熱除湿運転は、
四方弁２を冷房運転時の状態とし、三方弁３を図示位置
とし、第１開度調整弁５を全閉とし、第２開度調整弁７
を絞り状態として、圧縮機１、四方弁２、三方弁３３、
バイパス回路３４、第１室内熱交換器６、第２開度調整
弁７、第２室内熱交換器８、四方弁２、圧縮機１の冷媒
循環経路を構成して行う。斯かる冷媒循環経路におい
て、圧縮機１から吐出された冷媒は、第１室内熱交換器
６で室内空気を再熱（第２室内熱交換器８で冷却除湿さ
れた後の室内空気を加熱）して凝縮液化し、第２開度調
整弁７で低圧２相状態に変化し、第２室内熱交換器８で
室内空気を冷却除湿して蒸発気化し、圧縮機１に戻る。
従って、室内空気は第２室内熱交換器８で冷却除湿さ
れ、第１室内熱交換器６で再熱されるので、温度は大き
く変化せず除湿されることになり所謂除湿運転が行われ
ることになる。The refrigerant reheating and dehumidifying operation by the cooling cycle is as follows.
The four-way valve 2 is in the state of the cooling operation, the three-way valve 3 is at the illustrated position, the first opening adjustment valve 5 is fully closed, and the second opening adjustment valve 7
, The compressor 1, the four-way valve 2, the three-way valve 33,
The bypass circuit 34, the first indoor heat exchanger 6, the second opening adjustment valve 7, the second indoor heat exchanger 8, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 reheats the indoor air in the first indoor heat exchanger 6 (heats the indoor air after being cooled and dehumidified in the second indoor heat exchanger 8). The second indoor heat exchanger 8 cools and dehumidifies the indoor air, evaporates and vaporizes the air, and returns to the compressor 1.
Therefore, the indoor air is cooled and dehumidified in the second indoor heat exchanger 8 and reheated in the first indoor heat exchanger 6, so that the temperature is not greatly changed and dehumidified, so that a so-called dehumidifying operation is performed. Become.
【００３２】次に、暖房サイクルによる冷媒再熱除湿運
転は、四方弁２を暖房運転時の状態とし、三方弁３３を
図示位置とし、第１開度調整弁５を全閉とし、第２開度
調整弁７を絞り状態として、圧縮機１、四方弁２、第２
室内熱交換器８、第２開度調整弁７、第１室内熱交換器
６、バイパス回路３４、三方弁３３、四方弁２、圧縮機
１の冷媒循環経路を構成して行う。斯かる冷媒循環経路
において、圧縮機１から吐出された冷媒は、第２室内熱
交換器８で室内空気を加熱して凝縮液化し、第２開度調
整弁７で低圧２相状態に変化し、第１室内熱交換器８で
加熱された室内空気を冷却除湿して蒸発気化し、圧縮機
１に戻る。従って、室内空気は室内熱交換器８で先ず加
熱され、次いで室内熱交換器６で冷却除湿されるので、
温度は大きく変化せず除湿されることになり所謂除湿運
転が行われることになる。Next, in the refrigerant reheating and dehumidifying operation by the heating cycle, the four-way valve 2 is set to the state during the heating operation, the three-way valve 33 is set to the illustrated position, the first opening adjustment valve 5 is fully closed, and the second opening With the degree adjustment valve 7 in the throttle state, the compressor 1, the four-way valve 2, the second
This is performed by configuring the indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat exchanger 6, the bypass circuit 34, the three-way valve 33, the four-way valve 2, and the refrigerant circulation path of the compressor 1. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 heats the indoor air in the second indoor heat exchanger 8 to be condensed and liquefied, and changes to a low-pressure two-phase state in the second opening adjustment valve 7. Then, the indoor air heated by the first indoor heat exchanger 8 is cooled and dehumidified to evaporate and return to the compressor 1. Therefore, the indoor air is first heated in the indoor heat exchanger 8 and then cooled and dehumidified in the indoor heat exchanger 6,
The temperature is not largely changed and dehumidification is performed, so that a so-called dehumidification operation is performed.
【００３３】以上のごとく本冷凍サイクルは冷房運転、
暖房運転、冷房サイクルによる冷媒再熱除湿運転及び暖
房サイクルによる冷媒再熱除湿運転が行える。また、再
熱熱交換器は室内熱交換器の一部であるから、専用の再
熱熱交換器を用いていないので室内機に余分のスペース
を必要としない。また、上記両冷媒再熱除湿運転におい
ては、室外熱交換器４は、三方弁３３の切換と第１開度
調整弁５の閉塞により、冷媒循環経路から分離された分
離回路を構成しているので、分離されたときに含まれて
いた冷媒以上には、冷媒回路内の冷媒が該室外熱交換器
４に入ることはなく、従って、該室内熱交換器４に冷媒
が必要以上に溜まり込むことはない。また、該冷凍サイ
クルにおいて、室内熱交換器６及び８の容量を異ならし
めると、冷房サイクル再熱除湿とするか、暖房サイクル
再熱除湿とするかにより、冷房気味除湿運転にしたり、
暖房気味除湿運転としたりすることができる。As described above, the present refrigeration cycle operates in cooling operation,
Heating operation, refrigerant reheat dehumidification operation by a cooling cycle, and refrigerant reheat dehumidification operation by a heating cycle can be performed. In addition, since the reheat heat exchanger is a part of the indoor heat exchanger, no extra space is required for the indoor unit because a dedicated reheat heat exchanger is not used. In the above-mentioned refrigerant reheat dehumidifying operation, the outdoor heat exchanger 4 forms a separation circuit separated from the refrigerant circulation path by switching the three-way valve 33 and closing the first opening adjustment valve 5. Therefore, the refrigerant in the refrigerant circuit does not enter the outdoor heat exchanger 4 more than the refrigerant contained at the time of separation, and therefore, the refrigerant accumulates in the indoor heat exchanger 4 more than necessary. Never. Further, in the refrigeration cycle, if the capacities of the indoor heat exchangers 6 and 8 are different, depending on whether the cooling cycle is reheat dehumidification or the heating cycle is reheat dehumidification, the cooling dehumidification operation is performed,
It is possible to perform a heating dehumidifying operation.
【００３４】また、空気調和機を長時間停止している
と、冷媒が室外熱交換器４に溜まり込むことがある、ま
た、冷房運転後或いは暖房運転後においては、室外熱交
換器４に冷媒がかなり溜まっているので、この冷媒を冷
媒再熱除湿運転に有効に使うべく回収することは冷媒回
路内に充填する冷媒量を低減する上では好ましいことで
ある。この回収を行うには、冷媒再熱除湿運転直前に、
第１開度調整弁５を閉塞して、所定時間又は図示せぬ低
圧スイッチが作動するまで三方弁３３を冷房・暖房運転
時の状態位置とするとともに四方弁２を暖房運転時の状
態位置とし、即ち、暖房運転サイクルとして暖房運転を
行い、その後に三方弁３３を切り替えて（冷房再熱除湿
運転を行う場合は、四方弁２を冷房運転時の状態に切り
換えて）再熱除湿運転時の状態に切り換えると、室外熱
交換器４内の冷媒を完全に回収することができる。When the air conditioner has been stopped for a long time, the refrigerant may accumulate in the outdoor heat exchanger 4, and after the cooling operation or the heating operation, the refrigerant may be stored in the outdoor heat exchanger 4. Therefore, it is preferable to recover the refrigerant so as to be effectively used in the refrigerant reheating and dehumidifying operation in order to reduce the amount of the refrigerant charged in the refrigerant circuit. To perform this recovery, immediately before the refrigerant reheating and dehumidifying operation,
The first opening degree adjustment valve 5 is closed, and the three-way valve 33 is set to the cooling / heating operation state position while the four-way valve 2 is set to the heating operation state for a predetermined time or until a low-pressure switch (not shown) is operated. That is, the heating operation is performed as a heating operation cycle, and thereafter, the three-way valve 33 is switched (when the cooling reheat dehumidification operation is performed, the four-way valve 2 is switched to the state of the cooling operation). By switching to the state, the refrigerant in the outdoor heat exchanger 4 can be completely recovered.
【００３５】（第４の実施の形態）次に、図４に基づき
第４の実施の形態について説明する。尚、同図において
図３と同一の符号は同一の機器を示す。また、室内空気
の流れは図３に同じである。この実施の形態は、図３の
第３の実施の形態と比較すると、該第３の実施の形態に
おいては前記室外熱交換器４を含む分離回路を構成する
ために第１開度調整弁５を閉塞していたが、これに代え
第１室内熱交換器７と第１開度調整弁５とを接続する配
管に三方弁４を設け、この三方弁４６と三方弁３３との
間にバイパス回路３４を接続したものである。(Fourth Embodiment) Next, a fourth embodiment will be described with reference to FIG. Note that the same reference numerals in FIG. 3 as those in FIG. 3 indicate the same devices. The flow of room air is the same as in FIG. This embodiment is different from the third embodiment shown in FIG. 3 in that in the third embodiment, the first opening adjustment valve 5 is used to form a separation circuit including the outdoor heat exchanger 4. However, instead of this, a three-way valve 4 is provided in a pipe connecting the first indoor heat exchanger 7 and the first opening adjustment valve 5, and a bypass is provided between the three-way valve 46 and the three-way valve 33. The circuit 34 is connected.
【００３６】即ち、図４において、室外熱交換器４は三
方弁３３を介し四方弁２に接続され、また、第１開度調
整弁５は三方弁４６を介し第１室内熱交換器６に接続さ
れ、更に、室外熱交換器４及び第１開度調整弁５をバイ
パスするバイパス回路３４が該三方弁３３と４６との間
に接続される。而して、冷房運転、暖房運転及び冷媒再
熱除湿運転時の冷媒流れは図面に記した矢印の通であ
る。That is, in FIG. 4, the outdoor heat exchanger 4 is connected to the four-way valve 2 via the three-way valve 33, and the first opening adjustment valve 5 is connected to the first indoor heat exchanger 6 via the three-way valve 46. The bypass circuit 34 is connected between the three-way valves 33 and 46 to bypass the outdoor heat exchanger 4 and the first opening adjustment valve 5. The flow of the refrigerant during the cooling operation, the heating operation, and the refrigerant reheating and dehumidifying operation is as indicated by the arrows in the drawing.
【００３７】即ち、冷房運転時は、四方弁２を図示のご
とき切換位置とし、三方弁３３及び４６を図示位置から
切り換えるとともに第２開度調整弁７を全開とし、第１
開度調整弁５を絞り状態として、圧縮機１、四方弁２、
三方弁３３、室外熱交換器４、第１開度調整弁５、三方
弁４６、第１室内熱交換器６、第２開度調整弁７、第２
室内熱交換器８、四方弁２、圧縮機１の冷媒循環経路を
構成する。斯かる冷媒循環経路において、圧縮機１から
吐出された高温高圧の冷媒は、室外熱交換器４で凝縮液
化し、第１開度調整弁５で低圧２相状態に変化し、第１
及び第２室内熱交換器６、８で室内空気を２段階に冷却
除湿して気化し、圧縮機１に戻る。That is, during the cooling operation, the four-way valve 2 is set to the switching position as shown, the three-way valves 33 and 46 are switched from the illustrated position, and the second opening adjustment valve 7 is fully opened.
The opening degree adjustment valve 5 is set to the throttle state, and the compressor 1, the four-way valve 2,
Three-way valve 33, outdoor heat exchanger 4, first opening adjustment valve 5, three-way valve 46, first indoor heat exchanger 6, second opening adjustment valve 7, second opening
The refrigerant circulation path of the indoor heat exchanger 8, the four-way valve 2, and the compressor 1 is configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 is condensed and liquefied in the outdoor heat exchanger 4, changed to a low-pressure two-phase state by the first opening adjustment valve 5, and
Then, the indoor air is cooled and dehumidified in two stages by the second indoor heat exchangers 6 and 8 to be vaporized and returned to the compressor 1.
【００３８】暖房運転時は、上記冷房運転時の状態から
四方弁２のみを切り換えて、圧縮機１、四方弁２、第２
室内熱交換器８、第２開度調整弁７、第１室内熱交換器
６、第１開度調整弁５、三方弁４６、室外熱交換器４、
三方弁３３、四方弁２、圧縮機１の冷媒循環経路を構成
する。斯かる冷媒循環経路において、圧縮機１から吐出
された高温高圧の冷媒は、第１及び第２室内熱交換器
６、８で室内空気を２段階に加熱し、冷媒自身は冷却さ
れ、凝縮液化し、第１開度調整弁５で低圧２相状態に変
化し、室外熱交換器４で蒸発気化し、圧縮機１に戻る。In the heating operation, only the four-way valve 2 is switched from the state in the cooling operation, and the compressor 1, the four-way valve 2, the second
The indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat exchanger 6, the first opening adjustment valve 5, the three-way valve 46, the outdoor heat exchanger 4,
The three-way valve 33, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the high-temperature and high-pressure refrigerant discharged from the compressor 1 heats the indoor air in two stages by the first and second indoor heat exchangers 6 and 8, and the refrigerant itself is cooled and condensed and liquefied. Then, the state is changed to the low-pressure two-phase state by the first opening degree adjustment valve 5, evaporated and vaporized by the outdoor heat exchanger 4, and returned to the compressor 1.
【００３９】冷房サイクルによる冷媒再熱除湿運転は、
四方弁２を冷房運転時の状態とし、三方弁３３及び４６
を図示位置とし、第１開度調整弁５を全閉とし、第２開
度調整弁７を絞り状態として、圧縮機１、四方弁２、三
方弁３３、バイパス回路３４、三方弁４６、第１室内熱
交換器６、第２開度調整弁７、第２室内熱交換器８、四
方弁２、圧縮機１の冷媒循環経路を構成して行う。斯か
る冷媒循環経路において、圧縮機１から吐出された冷媒
は、第１室内熱交換器６で室内空気を再熱して凝縮液化
し、第２開度調整弁７で低圧２相状態に変化し、第２室
内熱交換器８で室内空気を冷却除湿して蒸発気化し、圧
縮機１に戻る。従って、室内空気は室内熱交換器８で冷
却除湿され、室内熱交換器６で再熱されるので、温度は
大きく変化せず除湿されることになり所謂除湿運転が行
われることになる。The refrigerant reheating and dehumidifying operation by the cooling cycle is as follows.
The four-way valve 2 is set to the state during the cooling operation, and the three-way valves 33 and 46
, The first opening adjustment valve 5 is fully closed, the second opening adjustment valve 7 is in a throttled state, and the compressor 1, the four-way valve 2, the three-way valve 33, the bypass circuit 34, the three-way valve 46, the The first indoor heat exchanger 6, the second opening adjustment valve 7, the second indoor heat exchanger 8, the four-way valve 2, and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 reheats the indoor air in the first indoor heat exchanger 6 to be condensed and liquefied, and changes to a low-pressure two-phase state in the second opening adjustment valve 7. Then, the indoor air is cooled and dehumidified by the second indoor heat exchanger 8 to evaporate and return to the compressor 1. Therefore, the indoor air is cooled and dehumidified in the indoor heat exchanger 8 and reheated in the indoor heat exchanger 6, so that the temperature is not largely changed and dehumidified, so that a so-called dehumidifying operation is performed.
【００４０】次に、暖房サイクルによる冷媒再熱除湿運
転は、四方弁２を暖房運転時の状態とし、三方弁３３及
び４６を図示位置とし、第１開度調整弁５を全閉とし、
第２開度調整弁７を絞り状態として、圧縮機１、四方弁
２、第２室内熱交換器８、第２開度調整弁７、第１室内
熱交換器６、三方弁４６、バイパス回路３４、三方弁３
３、四方弁２、圧縮機１の冷媒循環経路を構成して行
う。斯かる冷媒循環経路において、圧縮機１から吐出さ
れた冷媒は、第２室内熱交換器８で室内空気を加熱して
凝縮液化し、第２開度調整弁７で低圧２相状態に変化
し、第１室内熱交換器８で第１室内熱交換器８で加熱さ
れた室内空気を冷却除湿して蒸発気化し、圧縮機１に戻
る。従って、室内空気は室内熱交換器８で先ず加熱さ
れ、次いで室内熱交換器６で冷却除湿されるので、温度
は大きく変化せず除湿されることになり所謂除湿運転が
行われることになる。Next, in the refrigerant reheat dehumidifying operation by the heating cycle, the four-way valve 2 is set to the state during the heating operation, the three-way valves 33 and 46 are set to the illustrated positions, and the first opening adjustment valve 5 is fully closed.
With the second opening adjustment valve 7 in the throttled state, the compressor 1, the four-way valve 2, the second indoor heat exchanger 8, the second opening adjustment valve 7, the first indoor heat exchanger 6, the three-way valve 46, the bypass circuit 34, three-way valve 3
3, the four-way valve 2 and the refrigerant circulation path of the compressor 1 are configured. In such a refrigerant circulation path, the refrigerant discharged from the compressor 1 heats the indoor air in the second indoor heat exchanger 8 to be condensed and liquefied, and changes to a low-pressure two-phase state in the second opening adjustment valve 7. Then, the indoor air heated by the first indoor heat exchanger 8 is cooled and dehumidified by the first indoor heat exchanger 8 to evaporate and return to the compressor 1. Accordingly, the indoor air is first heated in the indoor heat exchanger 8 and then cooled and dehumidified in the indoor heat exchanger 6, so that the temperature is not significantly changed and dehumidified, so that a so-called dehumidifying operation is performed.
【００４１】以上のごとく本冷凍サイクルは冷房運転、
暖房運転、冷房サイクルによる冷媒再熱除湿運転及び暖
房サイクルによる冷媒再熱除湿運転が行える。また、再
熱熱交換器は室内熱交換器の一部であるから、専用の再
熱熱交換器を用いていないので室内機に余分のスペース
を必要としない。また、上記両冷媒再熱除湿運転におい
ては、室外熱交換器４は、三方弁３３の切換と第１開度
調整弁５の閉塞により、冷媒循環経路から分離された分
離回路を構成しているので、分離されたときに含まれて
いた冷媒以上には、冷媒回路内の冷媒が該室外熱交換器
４に入ることはなく、従って、該室内熱交換器４に冷媒
が必要以上に溜まり込むことはない。また、該冷凍サイ
クルにおいて、室内熱交換器６及び８の容量を異ならし
めると、冷房サイクルによる冷媒再熱除湿運転とする
か、暖房サイクルによる冷媒再熱除湿運転とするかによ
り、冷房気味除湿運転にしたり、暖房気味除湿運転とし
たりすることができる。As described above, the refrigeration cycle is operated in the cooling mode.
Heating operation, refrigerant reheat dehumidification operation by a cooling cycle, and refrigerant reheat dehumidification operation by a heating cycle can be performed. In addition, since the reheat heat exchanger is a part of the indoor heat exchanger, no extra space is required for the indoor unit because a dedicated reheat heat exchanger is not used. In the above-mentioned refrigerant reheat dehumidifying operation, the outdoor heat exchanger 4 forms a separation circuit separated from the refrigerant circulation path by switching the three-way valve 33 and closing the first opening adjustment valve 5. Therefore, the refrigerant in the refrigerant circuit does not enter the outdoor heat exchanger 4 more than the refrigerant contained at the time of separation, and therefore, the refrigerant accumulates in the indoor heat exchanger 4 more than necessary. Never. Further, in the refrigeration cycle, when the capacities of the indoor heat exchangers 6 and 8 are different, depending on whether the refrigerant reheat dehumidification operation by the cooling cycle or the refrigerant reheat dehumidification operation by the heating cycle, the cooling dehumidification operation is performed. Or a heating mode dehumidifying operation.
【００４２】また、空気調和機を長時間停止している
と、冷媒が室外熱交換器４に溜まり込むことがある、ま
た、冷房運転後或いは暖房運転後においては、室外熱交
換器４に冷媒がかなり溜まっているので、この冷媒を冷
媒再熱除湿運転に有効に使うべく回収することは冷媒回
路内に充填する冷媒量を低減する上では好ましいことで
ある。この回収を行うには、冷媒再熱除湿運転直前に、
第１開度調整弁５を閉塞して、所定時間又は図示せぬ低
圧スイッチが作動するまで三方弁３３と四方弁２とを暖
房運転時の状態位置として運転を行い、その後に三方弁
３３及び４６を図示位置から切り替えて（暖房サイクル
による冷媒再熱除湿運転場合はこの三方弁３３及び４６
のみ切り替えればよいが、冷房サイクルによる冷媒再熱
除湿運転の場合は、この三方弁３３及び４６の切換に加
えて、四方弁２を切り替える）、冷媒再熱除湿運転する
ようにすると、冷媒再熱除湿運転前に室外熱交換器４内
の冷媒を冷媒回路に完全に回収することができる。If the air conditioner has been stopped for a long time, the refrigerant may accumulate in the outdoor heat exchanger 4. After the cooling operation or the heating operation, the refrigerant may be stored in the outdoor heat exchanger 4. Therefore, it is preferable to recover the refrigerant so as to be effectively used in the refrigerant reheating and dehumidifying operation in order to reduce the amount of the refrigerant charged in the refrigerant circuit. To perform this recovery, immediately before the refrigerant reheating and dehumidifying operation,
The first opening adjustment valve 5 is closed, and the three-way valve 33 and the four-way valve 2 are operated in the heating operation state position for a predetermined time or until a low-pressure switch (not shown) is operated. 46 is switched from the position shown in the figure (in the case of the refrigerant reheat dehumidifying operation by the heating cycle, the three-way valves 33 and 46 are used).
However, in the case of the refrigerant reheating and dehumidifying operation by the cooling cycle, in addition to the switching of the three-way valves 33 and 46, the four-way valve 2 is switched). Before the dehumidifying operation, the refrigerant in the outdoor heat exchanger 4 can be completely collected in the refrigerant circuit.
【００４３】（第５の実施の形態）次に、第５の実施の
形態について図５に基づき説明する。尚、同図において
図３及び２と同一の符号は同一の機器を示す。また、室
内空気の流れは図３に同じである。この第５の実施の形
態は、図５に示すように、図３の第３の実施の形態にお
いて、室外熱交換器４内の冷媒を、冷媒再熱除湿運転を
しながら冷媒循環経路の低圧側に戻す戻し回路２０（第
２実施の形態のものと同じもの）を付加したものであ
る。即ち、図５において、室外熱交換器４と第１開度調
整弁５とを接続する配管（分離回路の一部分）から、圧
縮機１の吸入側配管へ二方弁２１を介装する戻し回路２
０を付加したもので、他は図３の実施の形態と同一であ
る。(Fifth Embodiment) Next, a fifth embodiment will be described with reference to FIG. In this figure, the same reference numerals as those in FIGS. 3 and 2 denote the same devices. The flow of room air is the same as in FIG. As shown in FIG. 5, the fifth embodiment differs from the third embodiment in FIG. 3 in that the refrigerant in the outdoor heat exchanger 4 is subjected to a low-pressure A return circuit 20 (same as that of the second embodiment) for returning to the side is added. That is, in FIG. 5, a return circuit for interposing a two-way valve 21 from a pipe (a part of a separation circuit) connecting the outdoor heat exchanger 4 and the first opening adjustment valve 5 to a suction side pipe of the compressor 1. 2
0 is added, and the rest is the same as the embodiment of FIG.
【００４４】而して、該二方弁２１は、冷房運転時及び
暖房運転時は閉塞しておき、冷媒再熱除湿運転時に開放
する。従って、冷媒再熱除湿運転時、室外熱交換器４は
冷媒循環経路の低圧側に連通され、該室外熱交換器４内
に溜まっていた冷媒は、冷媒循環経路に回収され、冷媒
量の不足を生じたりすることがない。The two-way valve 21 is closed during the cooling operation and the heating operation, and is opened during the refrigerant reheating and dehumidifying operation. Therefore, during the refrigerant reheating and dehumidifying operation, the outdoor heat exchanger 4 is communicated with the low pressure side of the refrigerant circulation path, and the refrigerant accumulated in the outdoor heat exchanger 4 is collected in the refrigerant circulation path, and the refrigerant amount becomes insufficient. Does not occur.
【００４５】（第６の実施の形態）次に、第６の実施の
形態について図６に基づき説明する。尚、同図において
図４及び２と同一の符号は同一の機器を示す。また、室
内空気の流れは図３に同じである。この第６の実施の形
態は、図６に示すように、図４の第４の実施の形態にお
いて、室外熱交換器４内の冷媒を、冷媒再熱除湿運転を
しながら冷媒循環経路の低圧側に戻す戻し回路２０（第
２実施の形態のものと同じもの）を付加したものであ
る。即ち、図６において、室外熱交換器４と第１開度調
整弁５とを接続する配管（分離回路の一部分）から、圧
縮機１の吸入側配管へ二方弁２１を介装する戻し回路２
０を付加したもので、他は図４の第４の実施の形態と同
一である。(Sixth Embodiment) Next, a sixth embodiment will be described with reference to FIG. 4 and 2 indicate the same devices. The flow of room air is the same as in FIG. In the sixth embodiment, as shown in FIG. 6, in the fourth embodiment of FIG. 4, the refrigerant in the outdoor heat exchanger 4 is subjected to the low pressure of the refrigerant circulation path while performing the refrigerant reheat dehumidifying operation. A return circuit 20 (same as that of the second embodiment) for returning to the side is added. That is, in FIG. 6, a return circuit for interposing a two-way valve 21 from a pipe (a part of the separation circuit) connecting the outdoor heat exchanger 4 and the first opening adjustment valve 5 to a suction pipe of the compressor 1. 2
0 is added, and the rest is the same as the fourth embodiment in FIG.
【００４６】而して、該二方弁２１は、冷房運転時及び
暖房運転時は閉塞しておき、冷媒再熱除湿運転時に開放
する。従って、冷媒再熱除湿運転時、室外熱交換器４は
冷媒循環経路の低圧側に連通され、該室外熱交換器４内
に溜まっていた冷媒は、冷媒循環経路に回収され、冷媒
量の不足を生じたりすることがない。The two-way valve 21 is closed during the cooling operation and the heating operation, and is opened during the refrigerant reheating and dehumidifying operation. Therefore, during the refrigerant reheating and dehumidifying operation, the outdoor heat exchanger 4 is communicated with the low pressure side of the refrigerant circulation path, and the refrigerant accumulated in the outdoor heat exchanger 4 is collected in the refrigerant circulation path, and the refrigerant amount becomes insufficient. Does not occur.
【００４７】[0047]
【発明の効果】本発明は以上のように構成されているた
め、次のような効果を奏する。請求項１〜５記載の発明
によれば、四方弁、三方弁又は二方弁の切換または開閉
により冷房運転、暖房運転、冷媒再熱除湿運転が可能と
なる（請求項２記載の発明の場合は、冷房サイクルによ
る冷媒再熱除湿運転及び暖房サイクルによる冷媒再熱除
湿運転が可能となる）。また、冷媒再熱除湿運転時室外
熱交換器が冷媒循環経路から分離されるので、該室外熱
交換器に冷媒が溜まり込む虞れがない。また、室内熱交
換器を分割してその一部を再熱熱交換器に用いることに
より、室内機に再熱専用の熱交換器を設けるスペースを
不要とし、余分のスペースを必要とする従来の問題を解
決する。Since the present invention is configured as described above, the following effects can be obtained. According to the first to fifth aspects of the present invention, a cooling operation, a heating operation, and a refrigerant reheating and dehumidifying operation can be performed by switching or opening and closing a four-way valve, a three-way valve, or a two-way valve. This enables the refrigerant reheat dehumidification operation by the cooling cycle and the refrigerant reheat dehumidification operation by the heating cycle). In addition, since the outdoor heat exchanger is separated from the refrigerant circulation path during the refrigerant reheating and dehumidifying operation, there is no possibility that the refrigerant may accumulate in the outdoor heat exchanger. In addition, by dividing an indoor heat exchanger and using a part of the indoor heat exchanger as a reheat heat exchanger, a space for providing a heat exchanger exclusively for reheating in the indoor unit is unnecessary, and a conventional space requiring an extra space is required. Solve a problem.
【００４８】また、請求項６の発明によれば、請求項１
〜５の効果に加えて、冷媒再熱除湿運転を冷房サイクル
による冷媒再熱除湿運転または暖房サイクルによる冷媒
再熱除湿運転に選択的に切り替えることにより冷房気味
除湿運転或いは暖房気味除湿運転が行える。また、請求
項７の発明によれば、請求項１〜５の効果に加えて、室
外熱交換器内の冷媒を完全に冷媒循環経路に回収できる
ので、冷媒回路に充填する冷媒量を低減することができ
る。According to the invention of claim 6, according to claim 1,
In addition to the effects of (5), by selectively switching the refrigerant reheat dehumidification operation to the refrigerant reheat dehumidification operation by the cooling cycle or the refrigerant reheat dehumidification operation by the heating cycle, the cooling dehumidification operation or the heating dehumidification operation can be performed. According to the seventh aspect of the invention, in addition to the effects of the first to fifth aspects, the refrigerant in the outdoor heat exchanger can be completely recovered to the refrigerant circulation path, so that the amount of refrigerant to be charged into the refrigerant circuit is reduced. be able to.
【図１】 第１実施の形態の冷媒回路図。FIG. 1 is a refrigerant circuit diagram of a first embodiment.
【図２】 第２実施の形態の冷媒回路図。FIG. 2 is a refrigerant circuit diagram of a second embodiment.
【図３】 第３実施の形態の冷媒回路図。FIG. 3 is a refrigerant circuit diagram of a third embodiment.
【図４】 第４実施の形態の冷媒回路図。FIG. 4 is a refrigerant circuit diagram of a fourth embodiment.
【図５】 第５実施の形態の冷媒回路図。FIG. 5 is a refrigerant circuit diagram according to a fifth embodiment.
【図６】 第６実施の形態の冷媒回路図。FIG. 6 is a refrigerant circuit diagram according to a sixth embodiment.
【図７】 従来の空気調和機の冷媒回路図。FIG. 7 is a refrigerant circuit diagram of a conventional air conditioner.
【図８】 他の従来の空気調和機の冷媒回路図。FIG. 8 is a refrigerant circuit diagram of another conventional air conditioner.
１…圧縮機、２、３…四方弁、４…室外熱交換器、５、
７…開度調整弁、６、８…室内熱交換器、２０…戻し回
路、２１…二方弁、３３、４６…三方弁、３４…バイパ
ス回路。1 ... Compressor, 2,3 ... Four-way valve, 4 ... Outdoor heat exchanger, 5,
7 ... opening adjustment valve, 6, 8 ... indoor heat exchanger, 20 ... return circuit, 21 ... two-way valve, 33,46 ... three-way valve, 34 ... bypass circuit.
Claims (7)
換器、第１開度調整弁、室内熱交換器を順次接続して冷
暖房運転可能とした空気調和機において、前記室内熱交
換器を２分割して、前記第１開度調整弁側を第１室内熱
交換器、前記圧縮機側を第２室内熱交換器とし、該第１
室内熱交換器と第２室内熱交換器との間に第２開度調整
弁を設け、該第２開度調整弁の開度調整を伴って、前記
２分割した室内熱交換器の何れか一方の室内熱交換器を
蒸発器として、他方を再熱熱交換器として作用せしめて
冷媒再熱除湿運転可能とするとともに、該冷媒再熱除湿
運転時に冷媒循環経路から前記室外熱交換器を分離する
分離回路を形成してなることを特徴とする空気調和機。1. An air conditioner in which a compressor, a four-way valve for switching between cooling and heating, an outdoor heat exchanger, a first opening degree adjustment valve, and an indoor heat exchanger are sequentially connected to enable an air-conditioning operation. And the first opening adjustment valve side is a first indoor heat exchanger, and the compressor side is a second indoor heat exchanger.
A second opening adjustment valve is provided between the indoor heat exchanger and the second indoor heat exchanger, and with the opening adjustment of the second opening adjustment valve, any one of the two divided indoor heat exchangers One of the indoor heat exchangers acts as an evaporator and the other acts as a reheat heat exchanger to enable the refrigerant reheat dehumidification operation, and separates the outdoor heat exchanger from the refrigerant circulation path during the refrigerant reheat dehumidification operation. An air conditioner characterized by forming a separation circuit that performs the following.
及び暖房運転時の状態何れにおいても冷媒再熱除湿運転
可能としたことを特徴とする請求項１記載の空気調和
機。2. The air conditioner according to claim 1, wherein the cooling / heating four-way valve is capable of performing a refrigerant reheating and dehumidifying operation in both a state during a cooling operation and a state during a heating operation.
換器とを接続する配管と、前記第１開度調整弁と前記室
内熱交換器間とを接続する配管とに跨がって四方弁を介
裝し、該四方弁の切換により前記分離回路を形成してな
ることを特徴とする請求項１又は２記載の空気調和機。3. A four-way straddling a pipe connecting the four-way valve for switching between cooling and heating and the outdoor heat exchanger, and a pipe connecting the first opening adjustment valve and the indoor heat exchanger. 3. The air conditioner according to claim 1, wherein a valve is interposed, and the separation circuit is formed by switching the four-way valve.
換器とを接続する配管に三方弁を設け、該三方弁を介し
て前記室外熱交換器及び前記第１開度調整弁をバイパス
するバイパス回路を設け、該三方弁を切換るとともに前
記第１開度調整弁を全閉とすることにより前記分離回路
を形成してなることを特徴とする請求項１又は２記載の
空気調和機。4. A three-way valve is provided in a pipe connecting the four-way valve for switching between cooling and heating and the outdoor heat exchanger, and the outdoor heat exchanger and the first opening adjustment valve are bypassed through the three-way valve. The air conditioner according to claim 1 or 2, wherein a bypass circuit is provided, and the separation circuit is formed by switching the three-way valve and fully closing the first opening adjustment valve.
換器とを接続する配管に第１三方弁を設けるとともに前
記第１開度調整弁と前記室内熱交換器とを接続する配管
に第２三方弁を設け、該第１三方弁と第２三方弁との間
に前記室外熱交換器及び前記第１開度調整弁をバイパス
するバイパス回路を設け、前記第１三方弁及び前記第２
三方弁の切換により前記分離回路を形成してなることを
特徴とする請求項１又は２記載の空気調和機。5. A pipe connecting the cooling / heating switching four-way valve and the outdoor heat exchanger is provided with a first three-way valve, and a pipe connecting the first opening adjustment valve and the indoor heat exchanger is provided with a first three-way valve. A two-way valve is provided, and a bypass circuit that bypasses the outdoor heat exchanger and the first opening adjustment valve is provided between the first three-way valve and the second three-way valve, and the first three-way valve and the second
The air conditioner according to claim 1 or 2, wherein the separation circuit is formed by switching a three-way valve.
としたことを特徴とする請求項２〜５いずれか１項に記
載の空気調和機。6. The air conditioner according to claim 2, wherein the first and second indoor heat exchangers have different capacities.
圧側回路と前記分離回路との間に開閉弁を有する冷媒戻
し回路を設けてなることを特徴とする請求項１〜６のい
ずれか１項に記載の空気調和機。7. A refrigerant return circuit having an on-off valve is provided between the low pressure side circuit of the refrigerant circulation path during the refrigerant reheat dehumidification operation and the separation circuit. 2. The air conditioner according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18242396A JPH1026435A (en) | 1996-07-11 | 1996-07-11 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18242396A JPH1026435A (en) | 1996-07-11 | 1996-07-11 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1026435A true JPH1026435A (en) | 1998-01-27 |
Family
ID=16118027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18242396A Withdrawn JPH1026435A (en) | 1996-07-11 | 1996-07-11 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1026435A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056946A (en) * | 2001-08-20 | 2003-02-26 | Daikin Ind Ltd | Air conditioner, dehumidifier and choking mechanism |
-
1996
- 1996-07-11 JP JP18242396A patent/JPH1026435A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056946A (en) * | 2001-08-20 | 2003-02-26 | Daikin Ind Ltd | Air conditioner, dehumidifier and choking mechanism |
| JP4608828B2 (en) * | 2001-08-20 | 2011-01-12 | ダイキン工業株式会社 | Air conditioner, dehumidifier, and throttle mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20031007 |