JP2002022301A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2002022301A JP2002022301A JP2000203255A JP2000203255A JP2002022301A JP 2002022301 A JP2002022301 A JP 2002022301A JP 2000203255 A JP2000203255 A JP 2000203255A JP 2000203255 A JP2000203255 A JP 2000203255A JP 2002022301 A JP2002022301 A JP 2002022301A
- Authority
- JP
- Japan
- Prior art keywords
- solenoid valve
- temperature
- compressor
- heat exchanger
- bypass passage
- 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.)
- Granted
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷凍可逆サイクル
を形成した空気調和機に係わり、より詳細には、低外気
温時における冷房運転時に室内側熱交換器への結氷を防
止できるとともに、通常の冷暖房運転時にパワーセーブ
バイパスとして使用できるバイパス路を設けた構造に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a reversible refrigerating cycle, and more particularly, it is possible to prevent ice formation on an indoor heat exchanger during a cooling operation at a low outside air temperature. The present invention relates to a structure provided with a bypass which can be used as a power save bypass during a cooling / heating operation.
【０００２】[0002]
【従来の技術】冷凍可逆サイクルを構成した従来の空気
調和機は、例えば図２で示すように、圧縮機１と、四方
弁２と、室外側熱交換器３と、キャピラリチューブ４
と、複数の室内機５に備えた室内側熱交換器5aおよび5b
とが順次配管接続されてなり、冷房運転時には、実線の
矢印で示すような冷媒回路を構成し、暖房運転時には、
破線の矢印で示すような冷媒回路を構成していた。2. Description of the Related Art As shown in FIG. 2, for example, a conventional air conditioner constituting a reversible refrigerating cycle includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and a capillary tube 4.
And indoor heat exchangers 5a and 5b provided in the plurality of indoor units 5.
Are sequentially connected by pipes, and constitute a refrigerant circuit as shown by solid-line arrows during cooling operation, and during heating operation,
A refrigerant circuit as shown by a dashed arrow was configured.
【０００３】しかしながら、例えば低外気温時における
冷房運転時には、低圧側および高圧側の冷媒圧力が低下
して前記室内側熱交換器5aおよび5b内の冷媒温度が０℃
以下になってしまうことから、同室内側熱交換器5aおよ
び5bの表面で水分が結氷してしまい、この結氷が成長し
ないようにするため前記圧縮機１のＯＮーＯＦＦを繰り
返すことになって、消費電力量が増加したり、機器の信
頼性が低下してしまうなどの問題点を有していた。However, for example, during a cooling operation at a low outside air temperature, the refrigerant pressures on the low pressure side and the high pressure side decrease, and the refrigerant temperature in the indoor heat exchangers 5a and 5b becomes 0 ° C.
Because of the following, moisture freezes on the surfaces of the indoor side heat exchangers 5a and 5b, and the compressor 1 is repeatedly turned on and off in order to prevent the freezing from growing. There are problems such as an increase in power consumption and a decrease in reliability of the device.
【０００４】[0004]
【発明が解決しようとする課題】本発明においては、上
記の問題点に鑑み、低外気温時における冷房運転時に室
内側熱交換器への結氷を防止できるとともに、通常の冷
暖房運転時にパワーセーブバイパスとして使用できるバ
イパス路を設けた冷凍可逆サイクルでなる空気調和機を
提供することを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems, in the present invention, it is possible to prevent icing on the indoor heat exchanger during cooling operation at a low outside air temperature, and to provide a power save bypass during a normal cooling and heating operation. It is an object of the present invention to provide an air conditioner comprising a reversible refrigeration cycle provided with a bypass which can be used as a refrigerating machine.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するため、圧縮機と、四方弁と、室外側熱交換器と、
キャピラリチューブと、少なくとも一つの室内側熱交換
器とが順次配管接続されてなる空気調和機において、前
記室外側熱交換器の出口側と、前記圧縮機の吸込側と
に、第一電磁弁および流量調整用の第一キャピラリチュ
ーブを備えた第一バイパス路を接続するとともに、前記
圧縮機の吐出側と、同圧縮機の吸込側であって前記第一
バイパス路の接続部および前記四方弁の間とに、第二電
磁弁および流量調整用の第二キャピラリチューブを備え
た第二バイパス路を接続し、前記室内側熱交換器に、同
室内側熱交換器の温度を検出する温度検出器を添設し、
低外気温時における冷房運転時に、前記温度検出器で検
出された前記室内側熱交換器の温度が所定の温度以下に
なった時、前記第一電磁弁および前記第二電磁弁を開放
するようにした構成となっている。According to the present invention, there is provided a compressor, a four-way valve, an outdoor heat exchanger,
In an air conditioner in which a capillary tube and at least one indoor heat exchanger are sequentially connected by piping, a first solenoid valve and an outlet side of the outdoor heat exchanger and a suction side of the compressor are provided. A first bypass path having a first capillary tube for adjusting a flow rate is connected, and a discharge side of the compressor and a suction side of the compressor, the connection part of the first bypass path and the four-way valve are connected. A second bypass path including a second solenoid valve and a second capillary tube for flow rate adjustment is connected between the first and second indoor heat exchangers, and a temperature detector for detecting the temperature of the indoor heat exchanger is provided. Attached,
During the cooling operation at a low outside air temperature, the first solenoid valve and the second solenoid valve are opened when the temperature of the indoor heat exchanger detected by the temperature detector becomes equal to or lower than a predetermined temperature. The configuration is as follows.
【０００６】また、圧縮機と、四方弁と、室外側熱交換
器と、キャピラリチューブと、少なくとも一つの室内側
熱交換器とが順次配管接続されてなる空気調和機におい
て、前記室外側熱交換器の出口側と、前記圧縮機の吸込
側とに、第一電磁弁および流量調整用の第一キャピラリ
チューブを備えた第一バイパス路を接続するとともに、
前記圧縮機の吐出側と、同圧縮機の吸込側であって前記
第一バイパス路の接続部および前記四方弁の間とに、第
二電磁弁および流量調整用の第二キャピラリチューブを
備えた第二バイパス路を接続し、通常の冷暖房運転時
に、前記第一電磁弁および前記第二電磁弁を開放するよ
うにした構成となっている。[0006] In the air conditioner in which a compressor, a four-way valve, an outdoor heat exchanger, a capillary tube, and at least one indoor heat exchanger are sequentially connected by a pipe, the outdoor heat exchanger A first bypass path including a first solenoid valve and a first capillary tube for adjusting the flow rate is connected to the outlet side of the vessel and the suction side of the compressor,
A second solenoid valve and a second capillary tube for adjusting the flow rate were provided between the discharge side of the compressor and the suction side of the compressor and between the connection part of the first bypass passage and the four-way valve. A second bypass path is connected to open the first solenoid valve and the second solenoid valve during a normal cooling and heating operation.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に基づいた実施例として説明する。図１は本発明
による空気調和機の冷凍サイクル図である。図で示すよ
うに、本発明による空気調和機の冷凍サイクルの基本構
成は、上記に説明した従来技術における構成と同様に、
圧縮機１と、四方弁２と、室外側熱交換器３と、キャピ
ラリチューブ４と、複数の室内機５に備えた室内側熱交
換器5aおよび5bとが順次配管接続されてなり、冷房運転
時には実線の矢印で示すような冷媒回路を構成し、暖房
運転時には破線の矢印で示すような冷媒回路を構成して
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. FIG. 1 is a refrigeration cycle diagram of the air conditioner according to the present invention. As shown in the figure, the basic configuration of the refrigeration cycle of the air conditioner according to the present invention is similar to the configuration in the conventional art described above,
A compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a capillary tube 4, and indoor heat exchangers 5a and 5b provided in a plurality of indoor units 5 are sequentially connected by pipes, and a cooling operation is performed. Sometimes, a refrigerant circuit as shown by a solid line arrow is formed, and during a heating operation, a refrigerant circuit as shown by a broken line arrow is formed.
【０００８】上記に説明した基本構成において、低外気
温時における冷房運転時に室内側熱交換器への結氷を防
止できるとともに、通常の冷暖房運転時にパワーセーブ
バイパスとして使用できるバイパス路を設けた冷凍可逆
サイクルの構成について、図に基づいて以下に説明す
る。[0008] In the above-described basic configuration, freezing can be prevented from being formed on the indoor heat exchanger during the cooling operation at a low outside air temperature, and a refrigeration reversible provided with a bypass that can be used as a power save bypass during a normal cooling and heating operation. The configuration of the cycle is described below with reference to the drawings.
【０００９】前記室外側熱交換器３の出口側と、前記圧
縮機１の吸込側とに、第一電磁弁６および流量調整用の
第一キャピラリチューブ７を備えた第一バイパス路Ａを
接続するとともに、前記圧縮機１の吐出側と、同圧縮機
１の吸込側であって前記第一バイパス路Ａの接続部およ
び前記四方弁２の間とに、第二電磁弁８および流量調整
用の第二キャピラリチューブ９を備えた第二バイパス路
Ｂを接続し、前記室内側熱交換器5aおよび5bに、同室内
側熱交換器5aおよび5bの温度を検出する温度検出器10を
添設し、低外気温時における冷房運転時に、前記温度検
出器10で検出された前記室内側熱交換器5aおよび5bの温
度が所定の温度以下になった時、前記第一電磁弁６およ
び前記第二電磁弁８を開放するようにした構成となって
いる。A first bypass passage A having a first solenoid valve 6 and a first capillary tube 7 for adjusting a flow rate is connected to the outlet side of the outdoor heat exchanger 3 and the suction side of the compressor 1. At the same time, a second solenoid valve 8 and a flow control valve are provided between the discharge side of the compressor 1 and the suction side of the compressor 1 between the connection portion of the first bypass passage A and the four-way valve 2. The second bypass passage B having the second capillary tube 9 is connected, and the indoor heat exchangers 5a and 5b are provided with a temperature detector 10 for detecting the temperatures of the indoor heat exchangers 5a and 5b. When the temperature of the indoor side heat exchangers 5a and 5b detected by the temperature detector 10 becomes lower than a predetermined temperature during the cooling operation at a low outside air temperature, the first solenoid valve 6 and the second The configuration is such that the solenoid valve 8 is opened.
【００１０】上記構成により、低外気温時の冷房運転時
に、前記第一バイパス路Ａを使用することによって、低
圧側の圧力が上昇して、低エンタルピィでのバイパス路
となることから、吐出温度を低下させる効果がある。ま
た、前記第二バイパス路Ｂを使用することによって、低
エンタルピィでのバイパス路であることから、吐出温度
を上昇させる効果がある。[0010] With the above configuration, during the cooling operation at low outside air temperature, the use of the first bypass passage A increases the pressure on the low pressure side to form a bypass passage with low enthalpy. Has the effect of lowering the Further, by using the second bypass passage B, since the bypass passage has a low enthalpy, there is an effect of increasing the discharge temperature.
【００１１】そこで、前記第一バイパス路Ａおよび前記
第二バイパス路Ｂを使用することにより、冷媒の流量調
整のための前記第一キャピラリチューブ７および前記第
二キャピラリチューブ９による抵抗を最適な抵抗に合わ
せることにより、低圧側の圧力のみが上昇する結果とな
って前記室内側熱交換器5aおよび5bへの結氷を効果的に
防止できるようになる。Therefore, by using the first bypass passage A and the second bypass passage B, the resistance of the first capillary tube 7 and the second capillary tube 9 for adjusting the flow rate of the refrigerant is adjusted to an optimum resistance. As a result, only the pressure on the low pressure side rises, so that ice formation on the indoor heat exchangers 5a and 5b can be effectively prevented.
【００１２】即ち、通常の運転時に、前記第一バイパス
路Ａおよび前記第二バイパス路Ｂは、前記第一電磁弁６
および前記第二電磁弁８を閉じることによって閉塞され
ることになり、低外気温時の冷房運転時に、前記温度検
出器10で検出された前記室内側熱交換器5aおよび5bの温
度が所定の温度以下になった時、前記第一電磁弁６およ
び前記第二電磁弁８を開いて低圧を上昇させ、結氷を防
止できる。That is, during normal operation, the first bypass passage A and the second bypass passage B are connected to the first solenoid valve 6.
And, by closing the second solenoid valve 8, the temperature of the indoor side heat exchangers 5a and 5b detected by the temperature detector 10 during the cooling operation at a low outside air temperature is a predetermined value. When the temperature falls below the temperature, the first solenoid valve 6 and the second solenoid valve 8 are opened to increase the low pressure and prevent ice formation.
【００１３】また、通常の冷暖房運転時に、前記第一電
磁弁６および前記第二電磁弁８を開放することによっ
て、前記第一バイパス路Ａおよび前記第二バイパス路Ｂ
をパワーセーブバイパスとして使用できるようになっ
て、運転効率を向上できるようになる。During the normal cooling and heating operation, the first bypass valve A and the second bypass valve B are opened by opening the first solenoid valve 6 and the second solenoid valve 8.
Can be used as a power save bypass, and the operating efficiency can be improved.
【００１４】以上の構成により、図１に基づいて上記に
説明したとおり、前記第一バイパス路Ａおよび前記第二
バイパス路Ｂを使用することにより、低外気温時の冷房
運転時には、前記圧縮機１のＯＮーＯＦＦを繰り返すこ
となく、前記室内側熱交換器5aおよび5bへの結氷を効果
的に防止できるようにし、通常の冷暖房運転時には、パ
ワーセーブできるようにした空気調和機となる。With the above configuration, as described above with reference to FIG. 1, by using the first bypass passage A and the second bypass passage B, the compressor can be operated during the cooling operation at a low outside air temperature. The air conditioner can effectively prevent ice formation on the indoor-side heat exchangers 5a and 5b without repeating ON-OFF of 1 and can save power during a normal cooling and heating operation.
【００１５】[0015]
【発明の効果】以上のように本発明によると、低外気温
時における冷房運転時に室内側熱交換器への結氷を防止
できるとともに、通常の冷暖房運転時にパワーセーブバ
イパスとして使用できるバイパス路を設けた冷凍可逆サ
イクルでなる空気調和機となる。As described above, according to the present invention, it is possible to prevent icing on the indoor heat exchanger during the cooling operation at a low outside air temperature and to provide a bypass path that can be used as a power save bypass during a normal cooling and heating operation. It becomes an air conditioner with a refrigerating reversible cycle.
【図１】本発明による空気調和機の冷凍サイクル図であ
る。FIG. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention.
【図２】従来例による空気調和機の冷凍サイクル図であ
る。FIG. 2 is a refrigeration cycle diagram of an air conditioner according to a conventional example.
１ 圧縮機 ２ 四方弁 ３ 室外側熱交換器 ４ キャピラリチューブ ５ 室内機 5a，5b 室内側熱交換器 ６ 第一電磁弁 ７ 第一キャピラリチューブ ８ 第二電磁弁 ９ 第二キャピラリチューブ 10 温度検出器 Ａ 第一バイパス路 Ｂ 第二バイパス路 DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Capillary tube 5 Indoor unit 5a, 5b Indoor heat exchanger 6 First solenoid valve 7 First capillary tube 8 Second solenoid valve 9 Second capillary tube 10 Temperature detector A First bypass path B Second bypass path
Claims (2)
と、キャピラリチューブと、少なくとも一つの室内側熱
交換器とが順次配管接続されてなる空気調和機におい
て、 前記室外側熱交換器の出口側と、前記圧縮機の吸込側と
に、第一電磁弁および流量調整用の第一キャピラリチュ
ーブを備えた第一バイパス路を接続するとともに、前記
圧縮機の吐出側と、同圧縮機の吸込側であって前記第一
バイパス路の接続部および前記四方弁の間とに、第二電
磁弁および流量調整用の第二キャピラリチューブを備え
た第二バイパス路を接続し、前記室内側熱交換器に、同
室内側熱交換器の温度を検出する温度検出器を添設し、 低外気温時における冷房運転時に、前記温度検出器で検
出された前記室内側熱交換器の温度が所定の温度以下に
なった時、前記第一電磁弁および前記第二電磁弁を開放
するようにした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, an outdoor heat exchanger, a capillary tube, and at least one indoor heat exchanger are sequentially connected by pipes. A first bypass passage including a first solenoid valve and a first capillary tube for adjusting a flow rate is connected to an outlet side of the compressor and a suction side of the compressor, and a discharge side of the compressor is connected to the same compression side. A second bypass passage including a second solenoid valve and a second capillary tube for flow control is connected between the connection portion of the first bypass passage and the four-way valve on the suction side of the machine, A temperature detector for detecting the temperature of the indoor heat exchanger is attached to the inner heat exchanger, and the temperature of the indoor heat exchanger detected by the temperature detector during the cooling operation at a low outside air temperature is reduced. When the temperature falls below a predetermined temperature, An air conditioner is characterized in that so as to open the solenoid valve and the second solenoid valve.
と、キャピラリチューブと、少なくとも一つの室内側熱
交換器とが順次配管接続されてなる空気調和機におい
て、 前記室外側熱交換器の出口側と、前記圧縮機の吸込側と
に、第一電磁弁および流量調整用の第一キャピラリチュ
ーブを備えた第一バイパス路を接続するとともに、前記
圧縮機の吐出側と、同圧縮機の吸込側であって前記第一
バイパス路の接続部および前記四方弁の間とに、第二電
磁弁および流量調整用の第二キャピラリチューブを備え
た第二バイパス路を接続し、 通常の冷暖房運転時に、前記第一電磁弁および前記第二
電磁弁を開放するようにしたことを特徴とする空気調和
機。2. An air conditioner in which a compressor, a four-way valve, an outdoor heat exchanger, a capillary tube, and at least one indoor heat exchanger are sequentially connected by pipes. A first bypass path including a first solenoid valve and a first capillary tube for adjusting a flow rate is connected to an outlet side of the compressor and a suction side of the compressor, and a discharge side of the compressor is connected to the same compression side. A second bypass passage including a second solenoid valve and a second capillary tube for flow control is connected between the connection portion of the first bypass passage and the four-way valve on the suction side of the machine, An air conditioner wherein the first solenoid valve and the second solenoid valve are opened during a cooling / heating operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203255A JP4539792B2 (en) | 2000-07-05 | 2000-07-05 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203255A JP4539792B2 (en) | 2000-07-05 | 2000-07-05 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002022301A true JP2002022301A (en) | 2002-01-23 |
| JP4539792B2 JP4539792B2 (en) | 2010-09-08 |
Family
ID=18700683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000203255A Expired - Fee Related JP4539792B2 (en) | 2000-07-05 | 2000-07-05 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4539792B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329836A (en) * | 2013-07-22 | 2015-02-04 | 广东美的暖通设备有限公司 | Refrigerant automatic recycling air conditioner system and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367964A (en) * | 1989-08-05 | 1991-03-22 | Mitsubishi Electric Corp | Air conditioner |
| JPH04356675A (en) * | 1991-06-03 | 1992-12-10 | Daikin Ind Ltd | Refrigerating apparatus |
| JPH094941A (en) * | 1995-06-21 | 1997-01-10 | Sanyo Electric Co Ltd | Refrigerating device |
-
2000
- 2000-07-05 JP JP2000203255A patent/JP4539792B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367964A (en) * | 1989-08-05 | 1991-03-22 | Mitsubishi Electric Corp | Air conditioner |
| JPH04356675A (en) * | 1991-06-03 | 1992-12-10 | Daikin Ind Ltd | Refrigerating apparatus |
| JPH094941A (en) * | 1995-06-21 | 1997-01-10 | Sanyo Electric Co Ltd | Refrigerating device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329836A (en) * | 2013-07-22 | 2015-02-04 | 广东美的暖通设备有限公司 | Refrigerant automatic recycling air conditioner system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4539792B2 (en) | 2010-09-08 |
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