JP2003343895A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2003343895A JP2003343895A JP2002149952A JP2002149952A JP2003343895A JP 2003343895 A JP2003343895 A JP 2003343895A JP 2002149952 A JP2002149952 A JP 2002149952A JP 2002149952 A JP2002149952 A JP 2002149952A JP 2003343895 A JP2003343895 A JP 2003343895A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- refrigerant
- valve
- indoor heat
- air conditioner
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
Landscapes
- Air Conditioning Control Device (AREA)
- 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、除湿運転時に同一
室内機内に凝縮器と蒸発器の両方を設置することによ
り、除湿しながら室内機吹き出し空気温度を調節できる
機構を備えたヒートポンプ式空気調和機に係り、特に除
湿運転時の省エネルギー化および低外気温時における快
適な除湿運転を行う際に好適なヒートポンプ式空気調和
機に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner having a mechanism capable of adjusting the temperature of air blown out from an indoor unit while dehumidifying by installing both a condenser and an evaporator in the same indoor unit during dehumidifying operation. The present invention relates to a heat pump type air conditioner suitable for energy saving during dehumidifying operation and comfortable dehumidifying operation during low outdoor temperature.
【０００２】[0002]
【従来の技術】一般家庭に広く普及している空気調和機
の構成としては、室内機と室外機が別体で構成されてお
り、室内機内には空気と冷媒を熱交換させるための熱交
換器と空気を送り出す送風機が設置されており、室外機
内には空気と冷媒を熱交換させるための熱交換器と送風
機、冷媒を循環させる圧縮機および冷媒を減圧する減圧
機等が設置されている。これらの室内機と室外機の間に
接続配管を用いて冷媒流路を形成し、室内機と室外機の
間を冷媒が行き来して冷凍サイクルが成り立っており、
冷房運転と暖房運転の切り替えは、四方弁等により冷媒
の流れ方向を変えることで切り替え、室内機側で冷媒の
熱を放熱するように制御すると暖房運転、室内機側で冷
媒が吸熱するように制御すると冷房運転となる。2. Description of the Related Art As an air conditioner widely used in ordinary households, an indoor unit and an outdoor unit are separately provided, and heat exchange for exchanging heat between air and refrigerant is performed inside the indoor unit. A fan and a blower that sends out air are installed, and a heat exchanger and a blower for exchanging heat between the air and the refrigerant, a compressor that circulates the refrigerant, and a decompressor that decompresses the refrigerant are installed in the outdoor unit. . A refrigerant flow path is formed between the indoor unit and the outdoor unit using a connection pipe, and the refrigerant flows between the indoor unit and the outdoor unit to form a refrigeration cycle,
Switching between cooling operation and heating operation is performed by changing the flow direction of the refrigerant with a four-way valve or the like.If control is performed to radiate the heat of the refrigerant on the indoor unit side, the heating operation and the refrigerant absorb heat on the indoor unit side. If controlled, it will be in cooling operation.
【０００３】また、空気調和機による除湿方法としては
いくつかの方式があり、弱冷房運転により除湿する方法
や室内機内にヒータを設置し冷房運転時にヒータ通電す
ることにより吹き出し空気温度を下げずに除湿する方法
等があるが、近年除湿運転時の快適性及び省エネルギー
化という観点から室内熱交換器の冷媒経路途中に除湿を
する際に減圧できる除湿弁を設置し、除湿弁を挟んで冷
媒上流側室内熱交換器を凝縮器、冷媒下流側室内熱交換
器を蒸発器として使用することによりヒータを使わずに
室内機からの吹き出し空気の温度を調節しながら除湿を
行う方式が多く採用されている。この除湿方式では、室
外ファンの回転数を調節することにより室外熱交換器で
放熱する熱量を調節できるため室内機からの吹き出し空
気温度を調節できるようになる。There are several methods of dehumidifying by an air conditioner, such as a method of dehumidifying by a weak cooling operation or a heater installed in an indoor unit and energizing the heater during the cooling operation without lowering the temperature of blown air. There are methods such as dehumidification, but in recent years, from the viewpoint of comfort during dehumidification operation and energy saving, a dehumidification valve that can reduce the pressure when dehumidifying is installed in the middle of the refrigerant path of the indoor heat exchanger, and the refrigerant upstream with the dehumidification valve sandwiched. By using the side indoor heat exchanger as a condenser and the refrigerant downstream side indoor heat exchanger as an evaporator, a method is often adopted in which dehumidification is performed without adjusting the temperature of the air blown from the indoor unit without using a heater. There is. In this dehumidification system, the amount of heat radiated by the outdoor heat exchanger can be adjusted by adjusting the rotation speed of the outdoor fan, so that the temperature of air blown out from the indoor unit can be adjusted.
【０００４】従来の空気調和機は上記のように構成され
ており、省エネルギー化や快適性向上の研究が進められ
ており、省エネルギー化に有効な手段として、冷凍サイ
クルにおける配管内冷媒の圧力損失を低減する研究がな
されている。The conventional air conditioner is constructed as described above, and researches for energy saving and improvement of comfort are being conducted. As an effective means for energy saving, the pressure loss of the refrigerant in the pipe in the refrigeration cycle is reduced. Research is being done to reduce it.
【０００５】[0005]
【発明が解決しようとする課題】冷凍サイクルにおける
配管内冷媒の圧力損失を低減し、省エネルギー化を図っ
たものとして、例えば、特開平7-120076号公報記載の技
術がある。この発明によると、圧縮機、四方弁、室外熱
交換器、減圧装置、室内熱交換器等を順次環状に接続し
た冷媒回路を有する空気調和機において、前記減圧装置
と室内熱交換器の間に設けられ、その下部が前記室内熱
交換器に接続すると共に、上部が開閉弁及びキャピラリ
チューブを介して前記圧縮機の吸い込み側に接続する気
液分離器を備えた空気調和機で、前記気液分離機におい
て冷媒を液とガスに分離し、ガス冷媒は前記開閉弁及び
キャピラリチューブを介して前記圧縮機吸込み側に戻
し、液冷媒を室内機側へ流す構成となっている。これに
より、延長配管及び室内機へ流入する冷媒の流速を抑
え、配管内冷媒の圧力損失を低減し、冷房能力の低下を
防止している。A technique described in Japanese Patent Application Laid-Open No. 7-120076, for example, is one in which the pressure loss of the refrigerant in the piping in the refrigeration cycle is reduced to save energy. According to this invention, in an air conditioner having a refrigerant circuit in which a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducing device, an indoor heat exchanger and the like are sequentially connected in an annular shape, between the pressure reducing device and the indoor heat exchanger. An air conditioner provided with a gas-liquid separator, the lower part of which is connected to the indoor heat exchanger, and the upper part of which is connected to the suction side of the compressor through an on-off valve and a capillary tube. In the separator, the refrigerant is separated into liquid and gas, the gas refrigerant is returned to the compressor suction side via the on-off valve and the capillary tube, and the liquid refrigerant is made to flow to the indoor unit side. This suppresses the flow velocity of the refrigerant flowing into the extension pipe and the indoor unit, reduces the pressure loss of the refrigerant in the pipe, and prevents the cooling capacity from decreasing.
【０００６】しかしながらこの発明では、気液分離器か
らガス冷媒のみを圧縮機吸込みへ流すためにキャピラリ
チューブを使い調節しているため、冷房運転時の特定の
冷媒循環量について効果はあるが、室内機内部で除湿弁
を挟んで熱交換器を凝縮器と蒸発器に分け、ヒータを使
わずに室内機の吹き出し空気温度を調節しながら除湿す
る方式の空気調和機において、除湿運転時についての効
果は期待できるものではない。However, in the present invention, since the capillary tube is used to adjust only the gas refrigerant from the gas-liquid separator to the suction of the compressor, it is effective in the specific refrigerant circulation amount during the cooling operation, but it is effective in the room. The effect of dehumidifying operation in an air conditioner that separates the heat exchanger into a condenser and an evaporator with a dehumidification valve sandwiched inside the machine and adjusts the temperature of the air blown from the indoor unit without using a heater. Is not what you can expect.
【０００７】[0007]
【課題を解決するための手段】そこで、本発明では上記
事情を考慮したものであり、圧縮機、四方弁、室内熱交
換器、第１膨張弁、室外熱交換器等を備え、おのおのを
冷媒配管等で接続して冷媒回路を形成し、冷媒を循環さ
せることにより、冷房、暖房及び除湿運転を行うことの
できる空気調和機で、前記室内熱交換器は弁を絞ること
により冷媒を減圧することのできる除湿弁により第1室
内熱交換器と第2室内熱交換器に分割され、除湿運転時
に前記除湿弁を絞ることで前記室内熱交換器内の一方の
熱交換器を凝縮器、他方を蒸発器とすることのできる空
気調和機において、請求項１については前記第１膨張弁
と室内熱交換器との冷媒配管経路途中に設置され、か
つ、前記第１膨張弁をつなぐ配管および前記室内熱交換
器をつなぐ配管を上部から差込み接続すると共に、上部
から第２膨張弁を介して前記圧縮機吸い込み配管に接続
する気液分離器を備えたことを特徴とする空気調和機を
提供するものである。Therefore, the present invention has been made in consideration of the above circumstances and includes a compressor, a four-way valve, an indoor heat exchanger, a first expansion valve, an outdoor heat exchanger, and the like, each of which is a refrigerant. An air conditioner that can perform cooling, heating, and dehumidifying operations by connecting a pipe or the like to form a refrigerant circuit and circulating the refrigerant.The indoor heat exchanger depressurizes the refrigerant by throttling a valve. It is divided into a first indoor heat exchanger and a second indoor heat exchanger by a dehumidifying valve capable of condensing one heat exchanger in the indoor heat exchanger by squeezing the dehumidifying valve during dehumidifying operation, the other. In an air conditioner that can be used as an evaporator, according to claim 1, a pipe installed in the refrigerant pipe path between the first expansion valve and the indoor heat exchanger and connecting the first expansion valve and the pipe. The pipe connecting the indoor heat exchanger is at the top While Luo plug connection, there is provided an air conditioner characterized by comprising a gas-liquid separator connected to the suction compressor piping through the second expansion valve from the top.
【０００８】また請求項２では請求項１に加え、暖房サ
イクルの冷媒の流れで除湿運転をする制御において、前
記除湿弁を絞り減圧すると共に前記第１膨張弁は全閉と
し、前記第２膨張弁は全開とすることで、冷媒が前記室
外熱交換器を介さずに前記圧縮機吸込み配管へ戻したこ
とを特徴とする空気調和機を提供するものである。According to a second aspect of the present invention, in addition to the first aspect, in the control for performing the dehumidifying operation by the flow of the refrigerant in the heating cycle, the dehumidifying valve is throttled and decompressed, the first expansion valve is fully closed, and the second expansion is performed. The air conditioner is characterized in that the valve is fully opened so that the refrigerant returns to the compressor suction pipe without passing through the outdoor heat exchanger.
【０００９】また請求項３では請求項２に加え、前記室
外熱交換器と前記四方弁をつなぐ冷媒配管経路途中に開
閉弁を設置したことを特徴とする空気調和機を提供する
ものである。According to a third aspect of the present invention, in addition to the second aspect, an air conditioner is provided in which an opening / closing valve is installed in the middle of a refrigerant pipe path connecting the outdoor heat exchanger and the four-way valve.
【００１０】さらに請求項４では除湿運転を行う際に、
外気温を直接または間接的に検知すると共に、外気温に
応じて前記四方弁を切り替えたことを特徴とする空気調
和機を提供するものである。Further, in claim 4, when performing the dehumidifying operation,
The present invention provides an air conditioner characterized by detecting the outside air temperature directly or indirectly and switching the four-way valve according to the outside air temperature.
【００１１】[0011]
【発明の実施の形態】以下、本発明による空気調和機の
一実施例を図面を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings.
【００１２】図１は本発明に係る第一の実施例を示すサ
イクル系統図であり、暖房運転時の冷媒の流れで除湿運
転を行う場合について説明すると、圧縮機１で高温・高
圧ガスにされた冷媒は四方弁２を介して室内熱交換器３
に流入する。このとき室内熱交換器３は、除湿運転の際
に冷媒を減圧することのできる除湿弁４により第１室内
熱交換器５と第２室内熱交換器６に分割されており、除
湿運転時には除湿弁４を絞ることで、除湿弁４を挟んで
冷媒の流れ方向に対して上流側である第１室内熱交換５
は凝縮器となり、下流側の第２室内熱交換器６は蒸発器
となる。この室内熱交換器３を通過した冷媒は気液分離
器7の上部から挿入・接続された配管を通り、気液分離
器7内に流入する。流入してきた気液混合の冷媒は、こ
の気液分離器７内部でガス冷媒と液冷媒に分離され、液
冷媒は気液分離器7の上部から挿入・接続された配管を
通り、実線矢印８の方向に流れ、第１膨張弁９と室外熱
交換器１０を介して四方弁２へ流れ、さらに圧縮機吸込
み配管１１を介して圧縮機１へ流入する。また、気液分
離器７で分離されたガス冷媒は、気液分離器７の上部に
接続されたバイパス管１２を通り、破線矢印１３の方向
に流れ、第２膨張弁で減圧され、圧縮機吸い込み配管１
１に流入し、室外熱交換器１０を通過してきた冷媒と合
流し圧縮機１へ流入する。FIG. 1 is a cycle system diagram showing a first embodiment according to the present invention. Explaining a case where a dehumidifying operation is carried out by a flow of a refrigerant during a heating operation, a high temperature / high pressure gas is produced by a compressor 1. Refrigerant flows through the four-way valve 2 to the indoor heat exchanger 3
Flow into. At this time, the indoor heat exchanger 3 is divided into a first indoor heat exchanger 5 and a second indoor heat exchanger 6 by a dehumidifying valve 4 capable of reducing the pressure of the refrigerant during the dehumidifying operation, and the dehumidifying operation is performed during the dehumidifying operation. By squeezing the valve 4, the first indoor heat exchange 5 that is upstream with respect to the flow direction of the refrigerant across the dehumidification valve 4
Serves as a condenser, and the second indoor heat exchanger 6 on the downstream side serves as an evaporator. The refrigerant passing through the indoor heat exchanger 3 flows into the gas-liquid separator 7 through the pipe inserted and connected from the upper part of the gas-liquid separator 7. The gas-liquid mixed refrigerant that has flowed in is separated into a gas refrigerant and a liquid refrigerant inside the gas-liquid separator 7, and the liquid refrigerant passes through a pipe inserted and connected from the upper portion of the gas-liquid separator 7 and a solid line arrow 8 Flow through the first expansion valve 9 and the outdoor heat exchanger 10 to the four-way valve 2, and further flow into the compressor 1 through the compressor suction pipe 11. The gas refrigerant separated by the gas-liquid separator 7 flows through the bypass pipe 12 connected to the upper part of the gas-liquid separator 7 in the direction of the broken line arrow 13, is decompressed by the second expansion valve, and is compressed by the compressor. Suction pipe 1
1 and then merges with the refrigerant that has passed through the outdoor heat exchanger 10 and flows into the compressor 1.
【００１３】このような構成にすることにより、冷房運
転時における延長配管の圧力損失を低減し、省エネルギ
ー化を図れるだけでなく、第２膨張弁１４の開度を調節
することで、暖房運転時の冷媒の流れで除湿運転をする
場合においても液冷媒とガス冷媒の分離を良好にするこ
とができるため、冷媒が室外熱交換器１０を通過する際
に生じる圧力損失を低減することができ、圧縮機１に流
入する冷媒の密度が低下するのを防止できるため、冷媒
循環量が低下せずに運転でき、除湿効率の向上が図れ
る。With such a configuration, not only the pressure loss of the extension pipe during cooling operation can be reduced to save energy, but also the opening degree of the second expansion valve 14 can be adjusted so that the heating operation is performed. Since the separation of the liquid refrigerant and the gas refrigerant can be made good even when the dehumidifying operation is performed by the refrigerant flow of, the pressure loss that occurs when the refrigerant passes through the outdoor heat exchanger 10 can be reduced, Since it is possible to prevent the density of the refrigerant flowing into the compressor 1 from decreasing, it is possible to operate without reducing the refrigerant circulation amount and improve the dehumidification efficiency.
【００１４】図２は本発明に係る第二の実施例であり、
暖房運転時の冷媒の流れで除湿運転をする際に、室外熱
交換器１０を冷媒が通過することなく圧縮機吸込み配管
１１へ流入させるように第１膨張弁を全閉にした例であ
る。この図において圧縮機１により高温・高圧状態にな
ったガス冷媒は四方弁２を介して第１室内熱交換器５に
流入する。次にこの第１室内熱交換器５で高温・高圧ガ
ス冷媒は放熱しながら液化していき除湿弁４に流入す
る。除湿弁４で冷媒は減圧され第２室内熱交換器６に流
入し、吸熱しながらガス化していく。このとき、空気中
の水分を第２室内熱交換器６で凝縮させるため除湿がで
きる。次に第２室内熱交換器から流出した冷媒は気液分
離器７に流入する。この時、第１膨張弁９は全閉、第２
膨張弁１４は全開となっているため、気液分離器７に流
入した冷媒はすべてハ゛イハ゜ス管１２および第２膨張弁１４
を介して圧縮機吸込み配管１１に流れ、圧縮機1に戻る
ようになる。FIG. 2 shows a second embodiment according to the present invention.
This is an example in which the first expansion valve is fully closed so that the refrigerant flows into the compressor suction pipe 11 without passing through the outdoor heat exchanger 10 when the dehumidifying operation is performed by the flow of the refrigerant during the heating operation. In this figure, the gas refrigerant that has been brought into a high temperature / high pressure state by the compressor 1 flows into the first indoor heat exchanger 5 via the four-way valve 2. Next, in this first indoor heat exchanger 5, the high temperature and high pressure gas refrigerant liquefies while radiating heat and flows into the dehumidification valve 4. The refrigerant is decompressed by the dehumidification valve 4, flows into the second indoor heat exchanger 6, and is gasified while absorbing heat. At this time, moisture in the air is condensed in the second indoor heat exchanger 6, so that dehumidification can be performed. Next, the refrigerant flowing out of the second indoor heat exchanger flows into the gas-liquid separator 7. At this time, the first expansion valve 9 is fully closed and the second expansion valve 9 is closed.
Since the expansion valve 14 is fully open, all the refrigerant that has flowed into the gas-liquid separator 7 is the bypass gas pipe 12 and the second expansion valve 14.
Through the compressor suction pipe 11 and returns to the compressor 1.
【００１５】このような膨張弁制御をすることで、低外
気温時の除湿運転において生じる室外熱交換器への冷媒
溜まりや室内熱交換器の着霜を防止することができるた
め、安定して除湿運転を行うことができ、快適性の向上
が図れる。By controlling the expansion valve as described above, it is possible to prevent the refrigerant from accumulating in the outdoor heat exchanger and the frost on the indoor heat exchanger, which occur during the dehumidifying operation at a low outdoor temperature, so that the indoor heat exchanger can be stably maintained. A dehumidifying operation can be performed and comfort can be improved.
【００１６】図３は本発明に係る第三の実施例を示す図
であり、室外熱交換器１０と四方弁２を接続する配管途
中に開閉弁１５を設置したものである。この開閉弁１５
を設けることにより、暖房運転時の冷媒の流れで除湿運
転をする際に、第１膨張弁９を全閉、第２膨張弁１４を
全開にし、室外熱交換器１０を冷媒が通過することなく
圧縮機吸込み配管１１に冷媒を流す方式において、吸込
み配管１１から四方弁２を介して室外熱交換器１０に逆
流し、室外熱交換器１０に冷媒が溜まるのを開閉弁１５
が閉じることで防止できるため、除湿運転時の冷媒不足
を解消することができるため、さらに安定した状態で除
湿運転をすることが可能になる。FIG. 3 is a diagram showing a third embodiment according to the present invention, in which an opening / closing valve 15 is installed in the middle of a pipe connecting the outdoor heat exchanger 10 and the four-way valve 2. This on-off valve 15
By providing the above, when the dehumidifying operation is performed by the flow of the refrigerant during the heating operation, the first expansion valve 9 is fully closed and the second expansion valve 14 is fully opened so that the refrigerant does not pass through the outdoor heat exchanger 10. In the system in which the refrigerant flows through the compressor suction pipe 11, the reverse flow from the suction pipe 11 to the outdoor heat exchanger 10 via the four-way valve 2 prevents the refrigerant from accumulating in the outdoor heat exchanger 10.
Can be prevented by closing, so that the shortage of the refrigerant during the dehumidifying operation can be eliminated, so that the dehumidifying operation can be performed in a more stable state.
【００１７】図４は本発明に係る第四の実施例を示すフ
ローチャートの図であり、外気温を直接または間接的に
検知し、その温度があらかじめ任意に設定された温度Ｔ
1以上ならば冷房サイクルの冷媒の流れで除湿運転を行
い、Ｔ1以下ならば暖房サイクルの冷媒の流れで除湿運
転を行うように四方弁２を切り替える制御を行うもので
ある。このとき、冷房サイクルの冷媒の流れで除湿を行
う場合は図５に示すような流れになる。すなわち、圧縮
機１から吐出した冷媒は四方弁2を通過して室外熱交換
器１０に流入し、第1膨張弁９を通過した後、気液分離
器７に流れ込み、第2室内熱交換器６に流入する。そし
て、除湿弁４にて減圧され第1室内熱交換器５に流入す
る。このとき、第2室内熱交換器６は凝縮器の一部とな
り、第1室内熱交換器５は蒸発器となり第1室内熱交換器
５にて除湿を行なうことになる。第1室内熱交換器５か
ら流出した冷媒は四方弁２を介して圧縮機１に戻るよう
になる。また、図６はさらにあらかじめ任意に設定され
たＴ2により暖房サイクルで除湿を行う場合について、
外気温がＴ2以上なら第１膨張弁９は全開となり、Ｔ2以
下ならば第１膨張弁９が全閉となり、室外熱交換器１０
をバイハ゜スするように設定したものである。FIG. 4 is a flow chart showing a fourth embodiment according to the present invention, in which the outside air temperature is detected directly or indirectly and the temperature T is set to an arbitrary value in advance.
If it is 1 or more, the dehumidifying operation is performed by the refrigerant flow in the cooling cycle, and if it is T1 or less, the dehumidifying operation is performed by the refrigerant flow in the heating cycle. At this time, when dehumidifying is performed by the refrigerant flow in the cooling cycle, the flow is as shown in FIG. That is, the refrigerant discharged from the compressor 1 passes through the four-way valve 2 and flows into the outdoor heat exchanger 10, passes through the first expansion valve 9, and then flows into the gas-liquid separator 7, and the second indoor heat exchanger. Inflow to 6. Then, it is decompressed by the dehumidification valve 4 and flows into the first indoor heat exchanger 5. At this time, the second indoor heat exchanger 6 becomes a part of the condenser, the first indoor heat exchanger 5 becomes an evaporator, and the first indoor heat exchanger 5 dehumidifies. The refrigerant flowing out of the first indoor heat exchanger 5 returns to the compressor 1 via the four-way valve 2. In addition, FIG. 6 shows a case where dehumidification is performed in the heating cycle by T2 which is set in advance as desired.
If the outside air temperature is T2 or higher, the first expansion valve 9 is fully opened, and if the outside air temperature is T2 or lower, the first expansion valve 9 is fully closed, and the outdoor heat exchanger 10 is opened.
Is set to bypass.
【００１８】通常、冷房サイクルの冷媒の流れで除湿を
行う場合において室外熱交換器１０は凝縮器の一部にな
るため、外気温が高い場合には室外ファンの回転数等で
熱交換量を調節できるが、外気温が低い場合には、室外
ファンを停止させても室外熱交換器１０に液冷媒が溜ま
ってしまい、除湿効率が低下するという問題がある。し
かし、本発明のように外気温が低い場合に暖房サイクル
で除湿を行うことにより、室外熱交換器１０は蒸発器の
一部となるため、室外熱交換器１０に溜まる冷媒量が低
減でき、除湿効率の大幅な低下を防止することができ
る。さらに、暖房サイクルで除湿を行う方式において、
外気温がさらに低い場合には第１膨張弁９を閉じ、室外
熱交換器１０をハ゛イハ゜スすることで、外気温の影響を概ね
無くすことができ、外気温が高い状態から低い状態まで
広い範囲において除湿運転ができるため、快適性が向上
する。Usually, when dehumidifying with the flow of the refrigerant in the cooling cycle, the outdoor heat exchanger 10 becomes a part of the condenser. Therefore, when the outdoor temperature is high, the heat exchange amount is determined by the rotation speed of the outdoor fan. Although it can be adjusted, when the outdoor temperature is low, there is a problem in that even if the outdoor fan is stopped, the liquid refrigerant accumulates in the outdoor heat exchanger 10 and the dehumidification efficiency decreases. However, by performing dehumidification in the heating cycle when the outdoor temperature is low as in the present invention, the outdoor heat exchanger 10 becomes a part of the evaporator, so that the amount of refrigerant accumulated in the outdoor heat exchanger 10 can be reduced, It is possible to prevent a significant decrease in dehumidification efficiency. Furthermore, in the method of dehumidifying in the heating cycle,
When the outside air temperature is lower, the first expansion valve 9 is closed and the outdoor heat exchanger 10 is bypassed, so that the influence of the outside air temperature can be almost eliminated, and in a wide range from a high outside temperature to a low outside temperature. Dehumidification operation can be performed, which improves comfort.
【００１９】[0019]
【発明の効果】以上述べたように本発明による空気調和
機の効果は、請求項１では圧縮機、四方弁、室内熱交換
器、第１膨張弁、室外熱交換器等を備え、おのおのを冷
媒配管等で接続して冷媒回路を形成し、冷媒を循環させ
ることにより、冷房、暖房及び除湿運転を行うことので
きる空気調和機で、前記室内熱交換器は弁を閉じること
により冷媒を減圧することのできる除湿弁により第1室
内熱交換器と第2室内熱交換器に分割され、除湿運転時
に前記除湿弁を閉じることで前記室内熱交換器内の一方
の熱交換器を凝縮器、他方を蒸発器とすることのできる
空気調和機において、前記第１膨張弁と室内熱交換器と
の冷媒配管経路途中に設置され、かつ、前記第１膨張弁
をつなぐ配管および前記室内熱交換器をつなぐ配管を上
部から差込み接続すると共に、上部から第２膨張弁を介
して前記圧縮機吸い込み配管に接続する気液分離器を備
えることにより、暖房運転時の冷媒の流れで除湿を行う
際の室外熱交換器の圧力損失を低減することができ、冷
媒循環量の低下を防止し、除湿効率を向上させることが
できる。As described above, the effect of the air conditioner according to the present invention is, in claim 1, provided with a compressor, a four-way valve, an indoor heat exchanger, a first expansion valve, an outdoor heat exchanger, and the like. An air conditioner that can perform cooling, heating, and dehumidifying operations by circulating a refrigerant by connecting with a refrigerant pipe or the like to form a refrigerant circuit, and the indoor heat exchanger depressurizes the refrigerant by closing a valve. Is divided into a first indoor heat exchanger and a second indoor heat exchanger by a dehumidification valve that can be a condenser one heat exchanger in the indoor heat exchanger by closing the dehumidification valve during dehumidification operation, In an air conditioner capable of using the other as an evaporator, a pipe installed in the middle of a refrigerant pipe path between the first expansion valve and the indoor heat exchanger, and connecting the first expansion valve, and the indoor heat exchanger Connect the piping that connects At the same time, by providing a gas-liquid separator that is connected to the compressor suction pipe from above through the second expansion valve, the pressure loss of the outdoor heat exchanger when dehumidifying with the flow of the refrigerant during heating operation is reduced. It is possible to prevent the decrease of the refrigerant circulation amount and improve the dehumidification efficiency.
【００２０】また請求項２では暖房サイクルの冷媒の流
れで除湿運転をする制御において、前記除湿弁を閉じ減
圧すると共に前記第１膨張弁は全閉とし、前記第２膨張
弁は全開とすることで、冷媒が前記室外熱交換器を介さ
ずに前記圧縮機吸込み配管へ戻すことで、低外気温時の
除湿運転において生じる室外熱交換器への冷媒溜まりや
室内熱交換器の着霜を防止することができるため、安定
して除湿運転を行うことができ、快適性の向上が図れ
る。According to a second aspect of the present invention, in the control for performing the dehumidifying operation by the flow of the refrigerant in the heating cycle, the dehumidifying valve is closed to reduce the pressure, the first expansion valve is fully closed, and the second expansion valve is fully opened. The refrigerant is returned to the compressor suction pipe without going through the outdoor heat exchanger, thereby preventing refrigerant accumulation in the outdoor heat exchanger and frost formation in the indoor heat exchanger that occur during dehumidifying operation at low outdoor temperature. Therefore, the dehumidifying operation can be stably performed, and the comfort can be improved.
【００２１】また請求項３では、前記室外熱交換器と前
記四方弁をつなぐ冷媒配管経路途中に開閉弁を設置し、
暖房運転時の冷媒の流れで除湿を行う場合に前記開閉弁
を閉にすることで、室外熱交換器に冷媒が溜まるのを防
止できるため、除湿運転時の冷媒不足を解消することが
でき、さらに安定した状態で除湿運転をすることが可能
になる。According to a third aspect of the present invention, an opening / closing valve is installed in the middle of a refrigerant pipe path connecting the outdoor heat exchanger and the four-way valve,
By closing the on-off valve when performing dehumidification by the flow of the refrigerant during the heating operation, it is possible to prevent the refrigerant from accumulating in the outdoor heat exchanger, it is possible to eliminate the lack of refrigerant during the dehumidifying operation, It is possible to perform the dehumidifying operation in a more stable state.
【００２２】さらに請求項４では、除湿運転を行う際
に、外気温を直接または間接的に検知すると共に、外気
温に応じて前記四方弁を切り替え、外気温が高い場合は
冷房サイクルで、外気温が低い場合は暖房サイクルで除
湿をおこなうことで、外気温が高い状態から低い状態ま
で広い範囲において除湿運転ができるため、快適性が向
上する。Further, in the fourth aspect, when the dehumidifying operation is performed, the outside air temperature is directly or indirectly detected, and the four-way valve is switched according to the outside air temperature. When the temperature is low, dehumidification is performed in the heating cycle, so that dehumidification operation can be performed in a wide range from a state where the outside temperature is high to a state where the outside temperature is low, so that comfort is improved.
【図１】本発明に係る第一の実施例によるサイクル図。FIG. 1 is a cycle diagram according to a first embodiment of the present invention.
【図２】本発明に係る第二の実施例によるサイクル図。FIG. 2 is a cycle diagram according to a second embodiment of the present invention.
【図３】本発明に係る第三の実施例によるサイクル図。FIG. 3 is a cycle diagram according to a third embodiment of the present invention.
【図４】本発明に係る第四の実施例によるフローチャー
トの図。FIG. 4 is a diagram of a flowchart according to a fourth embodiment of the present invention.
【図５】本発明のサイクルで冷房サイクル除湿を行う場
合のサイクル図。FIG. 5 is a cycle diagram when the cooling cycle dehumidification is performed in the cycle of the present invention.
【図６】本発明に係る第四の実施例による他のフローチ
ャートの図。FIG. 6 is a diagram of another flowchart according to the fourth embodiment of the present invention.
１…圧縮機、２…四方弁、３…室内熱交換器、４…除湿
弁、５…第1室内熱交換器、６…第2室内熱交換器、７…
気液分離器、８…冷媒流れ方向、９…第1膨張弁、１０
…室外熱交換器、１１…圧縮機吸込み配管、１２…バイ
パス管、１３…ガス冷媒流れ方向、１４…第2膨張弁、
１５…開閉弁。1 ... Compressor, 2 ... Four-way valve, 3 ... Indoor heat exchanger, 4 ... Dehumidification valve, 5 ... 1st indoor heat exchanger, 6 ... 2nd indoor heat exchanger, 7 ...
Gas-liquid separator, 8 ... Refrigerant flow direction, 9 ... First expansion valve, 10
... outdoor heat exchanger, 11 ... compressor suction pipe, 12 ... bypass pipe, 13 ... gas refrigerant flow direction, 14 ... second expansion valve,
15 ... Open / close valve.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２５Ｂ 13/00 ３１１ Ｆ２５Ｂ 13/00 ３１１ (72)発明者 藤林 一朗 栃木県下都賀郡大平町大字富田800番地 日立ホーム・アンド・ライフ・ソリューシ ョン株式会社栃木事業所内 (72)発明者 太田 和利 栃木県下都賀郡大平町大字富田800番地 日立ホーム・アンド・ライフ・ソリューシ ョン株式会社栃木事業所内 (72)発明者 野中 正之 栃木県下都賀郡大平町大字富田800番地 日立ホーム・アンド・ライフ・ソリューシ ョン株式会社栃木事業所内 Ｆターム(参考） 3L060 AA07 CC03 DD07 DD08 EE09 EE10 3L092 AA03 BA03 BA05 BA14 BA23 BA27 DA04 EA14 FA22 FA23 FA26 FA31 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI Theme Coat (reference) F25B 13/00 311 F25B 13/00 311 (72) Inventor Ichiro Fujibayashi 800 Tomita, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture Hitachi Home and Life Solution Co., Ltd.Tochigi Plant (72) Inventor Kazutoshi Ota 800 Tomita, Ohira Town, Shimotsuga-gun, Tochigi Prefecture Hitachi Home and Life Solution Co., Ltd. Tochigi Plant (72) ) Inventor Masayuki Nonaka 800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture Hitachi Home and Life Solutions Co., Ltd. Tochigi Works F-term (reference) 3L060 AA07 CC03 DD07 DD08 EE09 EE10 3L092 AA03 BA03 BA05 BA14 BA23 BA27 DA04 EA14 FA22 FA23 FA26 FA31
Claims (4)
弁、室外熱交換器等を備え、おのおのを冷媒配管等で接
続して冷媒回路を形成し、冷媒を循環させることによ
り、冷房、暖房及び除湿運転を行うことのできる空気調
和機で、前記室内熱交換器は弁を絞ることにより冷媒を
減圧することのできる除湿弁により第1室内熱交換器と
第2室内熱交換器に分割され、除湿運転時に前記除湿弁
を絞ることで前記室内熱交換器内の一方の熱交換器を凝
縮器、他方を蒸発器とすることのできる空気調和機にお
いて、 前記第１膨張弁と前記室内熱交換器との冷媒配管経路途
中に設置され、かつ、前記第１膨張弁をつなぐ配管およ
び前記室内熱交換器をつなぐ配管を上部から差込み接続
すると共に、上部から第２膨張弁を介して前記圧縮機吸
い込み配管に接続する気液分離器を備えたことを特徴と
する空気調和機。1. A compressor, a four-way valve, an indoor heat exchanger, a first expansion valve, an outdoor heat exchanger, and the like, each of which is connected by a refrigerant pipe or the like to form a refrigerant circuit and circulate a refrigerant. , An air conditioner capable of cooling, heating and dehumidifying operation, the indoor heat exchanger is a dehumidifying valve capable of reducing the pressure of the refrigerant by throttling the valve, the first indoor heat exchanger and the second indoor heat exchanger An air conditioner in which one of the indoor heat exchangers is a condenser and the other is an evaporator by dividing the dehumidifying valve during dehumidifying operation, the first expansion valve And a pipe for connecting the first expansion valve and a pipe for connecting the indoor heat exchanger, which are installed in the middle of the refrigerant pipe path between the indoor heat exchanger and the indoor heat exchanger, are connected from the upper side, and the second expansion valve is connected from the upper side. To the compressor suction pipe via An air conditioner characterized by comprising a gas-liquid separator to.
る制御において、前記除湿弁を絞り減圧すると共に前記
第１膨張弁は全閉とし、前記第２膨張弁は全開とするこ
とで、冷媒が前記室外熱交換器を介さずに前記圧縮機吸
込み配管へ戻したことを特徴とする請求項１記載の空気
調和機。2. In the control for performing the dehumidifying operation by the flow of the refrigerant in the heating cycle, the dehumidifying valve is squeezed to reduce the pressure, the first expansion valve is fully closed, and the second expansion valve is fully opened. 2. The air conditioner according to claim 1, wherein the air conditioner is returned to the compressor suction pipe without passing through the outdoor heat exchanger.
室外熱交換器と前記四方弁をつなぐ冷媒配管経路途中に
開閉弁を設置したことを特徴とする空気調和機。3. The air conditioner according to claim 2, wherein an opening / closing valve is installed in a refrigerant pipe path connecting the outdoor heat exchanger and the four-way valve.
空気調和機において除湿運転を行う際に、外気温を直接
または間接的に検知すると共に、外気温に応じて前記四
方弁を切り替えたことを特徴とする空気調和機。4. When the dehumidifying operation is performed in the air conditioner according to any one of claims 1 to 2, the outside air temperature is detected directly or indirectly, and the four-way valve is operated according to the outside air temperature. An air conditioner characterized by switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002149952A JP2003343895A (en) | 2002-05-24 | 2002-05-24 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002149952A JP2003343895A (en) | 2002-05-24 | 2002-05-24 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003343895A true JP2003343895A (en) | 2003-12-03 |
Family
ID=29767917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002149952A Pending JP2003343895A (en) | 2002-05-24 | 2002-05-24 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003343895A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100767683B1 (en) * | 2006-01-06 | 2007-10-17 | 엘지전자 주식회사 | Air conditioner |
| JP2011112327A (en) * | 2009-11-30 | 2011-06-09 | Panasonic Corp | Air conditioner and refrigerating device |
| CN112432267A (en) * | 2020-11-18 | 2021-03-02 | 迪莫环境科技(武汉)有限公司 | Heat pump system with dehumidification function and control method thereof |
-
2002
- 2002-05-24 JP JP2002149952A patent/JP2003343895A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100767683B1 (en) * | 2006-01-06 | 2007-10-17 | 엘지전자 주식회사 | Air conditioner |
| JP2011112327A (en) * | 2009-11-30 | 2011-06-09 | Panasonic Corp | Air conditioner and refrigerating device |
| CN112432267A (en) * | 2020-11-18 | 2021-03-02 | 迪莫环境科技(武汉)有限公司 | Heat pump system with dehumidification function and control method thereof |
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