JPH08261585A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH08261585A JPH08261585A JP6055895A JP6055895A JPH08261585A JP H08261585 A JPH08261585 A JP H08261585A JP 6055895 A JP6055895 A JP 6055895A JP 6055895 A JP6055895 A JP 6055895A JP H08261585 A JPH08261585 A JP H08261585A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- refrigerant
- outdoor heat
- heat exchanger
- 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
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気調和機に係わり、詳
しくは、暖房運転時の室外熱交換器の除霜をより速やか
に終わらせるための手段に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to means for more quickly ending defrosting of an outdoor heat exchanger during heating operation.
【０００２】[0002]
【従来の技術】空気調和機による暖房運転では外気温度
が高かったり、室内機側の送風が弱かったりすると図１
に示すような冷凍サイクルの高圧側の圧力が許容値を超
えてしまう。このような時には圧縮機１を動作させたま
ま室外送風機８の運転を停止させる、いわゆる、暖房過
負荷保護動作を実行させ、冷凍サイクルの高圧圧力の上
昇を抑えるようになっている。ところが、この暖房過負
荷保護動作中においても、室温調節機能により室温が設
定温度まで達していなければ圧力が低下し、蒸発器とし
て使用される室外熱交換器５の温度が氷点下になり、そ
のフィンに付着した凝縮水が霜となり、結氷することに
なる。そこで、従来の空気調和機では暖房運転が所定時
間行われると室外熱交換器５の温度が例えば−８℃以下
になったかどうかを検出し、その値が−８℃以下の時は
圧縮機１の出口側配管と室外熱交換器５の暖房運転時入
口部間に設けられたバイパス管６の電磁弁７を開き、圧
縮機１から吐出する高温のガス冷媒の一部を室外熱交換
器５に導入することにより除霜時間を短くするようにな
っている。2. Description of the Related Art In heating operation by an air conditioner, when the outside air temperature is high or the air blown from the indoor unit side is weak,
The pressure on the high pressure side of the refrigeration cycle as shown in (4) exceeds the allowable value. In such a case, the operation of the outdoor blower 8 is stopped while the compressor 1 is operating, that is, the so-called heating overload protection operation is executed to suppress the increase in the high pressure of the refrigeration cycle. However, even during this heating overload protection operation, if the room temperature does not reach the set temperature due to the room temperature adjusting function, the pressure drops, and the temperature of the outdoor heat exchanger 5 used as an evaporator falls below freezing point. Condensed water that has adhered to the frost becomes frost and freezes up. Therefore, in the conventional air conditioner, when the heating operation is performed for a predetermined time, it is detected whether the temperature of the outdoor heat exchanger 5 becomes, for example, −8 ° C. or lower, and when the value is −8 ° C. or lower, the compressor 1 Of the high-temperature gas refrigerant discharged from the compressor 1 by opening the solenoid valve 7 of the bypass pipe 6 provided between the outlet side pipe and the inlet portion of the outdoor heat exchanger 5 during the heating operation. It is designed to shorten the defrosting time.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、図１に
示すような配管構成により、暖房運転を継続させたまま
除霜運転を行うようにしたものでは、バイパス管６を経
由させた高温のガス冷媒が絞り手段４から室外熱交換器
５に向かう低温の液冷媒と混合してしまうため、ガス冷
媒の温度が早く低下し、除霜に要する時間が長くなって
しまうという欠点がある。したがって、本発明において
は、室外熱交換器の除霜にガス冷媒をより有効に利用で
きるようにした空気調和機を提供することを目的として
いる。However, in the case where the defrosting operation is carried out while the heating operation is continued by the piping configuration as shown in FIG. 1, the high temperature gas refrigerant is passed through the bypass pipe 6. However, since it mixes with the low temperature liquid refrigerant flowing from the expansion means 4 to the outdoor heat exchanger 5, there is a drawback that the temperature of the gas refrigerant decreases quickly and the time required for defrosting becomes long. Therefore, it is an object of the present invention to provide an air conditioner in which a gas refrigerant can be used more effectively for defrosting an outdoor heat exchanger.
【０００４】[0004]
【課題を解決するための手段】本発明は上記の課題を解
決するためになされたものであり、圧縮機と、四方弁
と、室内熱交換器と、絞り手段と、室外熱交換器等から
なる冷媒回路の、前記圧縮機の出口側配管と室外熱交換
器の暖房運転時入口部間に電磁弁を備えたバイパス管を
設け、暖房運転中に前記室外熱交換器の除霜を行う時、
前記電磁弁を開いて圧縮機から吐出する高温のガス冷媒
の一部を前記室外熱交換器に導入するようにしてなる空
気調和機において、前記室外熱交換器の冷媒管を内管と
外管とからなる二重管にするとともに、同二重管と、前
記絞り手段からの冷媒管と、前記バイパス管とが一体に
なる部位に、前記室外熱交換器の除霜を行う時、前記絞
り手段から前記外管に流入しようとする低温の液冷媒を
遮断し、前記バイパス管よりのガス冷媒を前記外管に導
入する冷媒流切換手段を設けることにした。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and includes a compressor, a four-way valve, an indoor heat exchanger, a throttle means, an outdoor heat exchanger and the like. When the defrosting of the outdoor heat exchanger is performed during the heating operation by providing a bypass pipe provided with a solenoid valve between the outlet side pipe of the compressor and the inlet portion of the outdoor heat exchanger during the heating operation of the refrigerant circuit ,
In an air conditioner configured to introduce a part of high-temperature gas refrigerant discharged from a compressor by opening the solenoid valve into the outdoor heat exchanger, a refrigerant pipe of the outdoor heat exchanger includes an inner pipe and an outer pipe. And a double pipe consisting of the double pipe, the refrigerant pipe from the throttle means, and the bypass pipe are integrated into a unit, when the outdoor heat exchanger is defrosted, Refrigerant flow switching means for cutting off the low-temperature liquid refrigerant flowing into the outer pipe from the means and introducing the gas refrigerant from the bypass pipe into the outer pipe is provided.
【０００５】[0005]
【作用】上記の構成であれば、室外熱交換器の冷媒管が
内管と外管とからなる二重管になっており、除霜時は内
管に絞り手段からの低温の液冷媒が流れ、外管に圧縮機
から吐出する高温のガス冷媒が流れることにより、ガス
冷媒の熱をより効果的にフィンに伝えることができるの
で室外熱交換器の除霜時間を短くすることができる。With the above construction, the refrigerant pipe of the outdoor heat exchanger is a double pipe consisting of an inner pipe and an outer pipe, and at the time of defrosting, the low temperature liquid refrigerant from the throttle means is fed to the inner pipe. By flowing the high temperature gas refrigerant discharged from the compressor to the outer pipe, the heat of the gas refrigerant can be more effectively transferred to the fins, so that the defrosting time of the outdoor heat exchanger can be shortened.
【０００６】[0006]
【実施例】以下、本発明の一実施例を図１〜図３に基づ
いて説明する。図１は空気調和機の基本的な冷凍サイク
ルとその制御系の概略を表したもので、１は圧縮機、２
は冷媒の流れを切り換える四方弁、３は室内熱交換器、
４はキャピラリーチューブ等を用いた絞り手段、５は室
外熱交換器、６は除霜運転を行う際に圧縮機１から吐出
するガス冷媒の一部を室外熱交換器５の暖房運転時の入
口側に導くバイパス管、７はバイパス管６の途中に設け
られた電磁弁、８は室外熱交換器５等を空冷する室外送
風機、９は室内熱交換器３によって熱交換された空気を
室内へ送出するための室内送風機、１０は圧縮機１、四
方弁２、電磁弁７、室外送風機６等を制御する室外機制
御部、１１は室内送風機９の他、図示されてない風向調
節装置等を制御する室内機制御部、１２は室内機制御部
１１と室外機制御部１０を結ぶ信号線である。矢印は暖
房運転時の冷媒の流れを表したもので、室外熱交換器５
の除霜が同時に行われる時は室外機制御部１０からの信
号で電磁弁７が開かれ、圧縮機１から吐出するガス冷媒
の一部が室外熱交換器５に導入される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Fig. 1 shows the outline of a basic refrigeration cycle of an air conditioner and its control system.
Is a four-way valve that switches the flow of refrigerant, 3 is an indoor heat exchanger,
Reference numeral 4 is a throttling means using a capillary tube or the like, 5 is an outdoor heat exchanger, 6 is an inlet of the outdoor heat exchanger 5 during heating operation, which is a part of the gas refrigerant discharged from the compressor 1 during defrosting operation. Side is a bypass pipe, 7 is a solenoid valve provided in the middle of the bypass pipe 6, 8 is an outdoor blower for air-cooling the outdoor heat exchanger 5, etc., 9 is air that has been heat-exchanged by the indoor heat exchanger 3 into the room An indoor blower for sending out, 10 is an outdoor unit control unit for controlling the compressor 1, the four-way valve 2, the solenoid valve 7, the outdoor blower 6 and the like, and 11 is an indoor blower 9 as well as an unillustrated wind direction adjusting device and the like. The indoor unit control unit 12 to be controlled is a signal line connecting the indoor unit control unit 11 and the outdoor unit control unit 10. The arrow indicates the flow of the refrigerant during heating operation, and the outdoor heat exchanger 5
When the defrosting is simultaneously performed, the electromagnetic valve 7 is opened by a signal from the outdoor unit controller 10, and a part of the gas refrigerant discharged from the compressor 1 is introduced into the outdoor heat exchanger 5.
【０００７】図２は本実施例の特徴とする室外熱交換器
５の暖房運転時の冷媒の入口側を拡大図示したものであ
る。室外熱交換器５は複数のフィン１３と、ヘアピン管
と、Ｕ字状に加工された接続管等で構成されるが、本実
施例ではこのヘアピン管とその接続管を内管１４ａと外
管１４ｂとからなる二重管１４にするとともに、この二
重管１４と、絞り手段４からの冷媒管１５と、バイパス
管６とが一体になる部位に冷媒流切換手段１６を設け
て、暖房運転時は絞り手段４から室外熱交換器５に向か
う低温の液冷媒を内管１４ａと外管１４ｂの両方に流通
させ、暖房運転と除霜運転が同時に行われる時は外管１
４ｂに流入しようとする低温の液冷媒を遮断して内管１
４ａだけに流通させ、外管１４ｂにはバイパス管６より
の高温のガス冷媒を流通させることにより、ガス冷媒の
熱をフィン１３に効果的に伝え、室外熱交換器５の除霜
時間を短くするようになっている。FIG. 2 is an enlarged view of the refrigerant inlet side of the outdoor heat exchanger 5 during the heating operation, which is a feature of this embodiment. The outdoor heat exchanger 5 includes a plurality of fins 13, a hairpin tube, a U-shaped connecting pipe, and the like. In this embodiment, the hairpin pipe and the connecting pipe are connected to the inner pipe 14a and the outer pipe. 14b, and the double pipe 14 and the refrigerant flow switching means 16 are provided at a portion where the double pipe 14, the refrigerant pipe 15 from the throttle means 4 and the bypass pipe 6 are integrated to perform the heating operation. At the time, the low-temperature liquid refrigerant flowing from the expansion means 4 to the outdoor heat exchanger 5 is circulated through both the inner pipe 14a and the outer pipe 14b, and when the heating operation and the defrosting operation are simultaneously performed, the outer pipe 1
The inner pipe 1 by shutting off the low-temperature liquid refrigerant that is about to flow into 4b
The heat of the gas refrigerant is effectively transmitted to the fins 13 by circulating the gas refrigerant having a temperature higher than that of the bypass pipe 6 through the outer pipe 14b and the outer pipe 14b, thereby shortening the defrosting time of the outdoor heat exchanger 5. It is supposed to do.
【０００８】冷媒流切換手段１６はその本体が略円筒状
になっていて、外部には内管１４ａと、外管１４ｂと、
絞り手段４からの冷媒管１５と、バイパス管６をそれぞ
れ接続する複数の接続口と、絞り手段４からの液冷媒を
外管１４ｂに通すための孔１７が設けられている。ま
た、円筒状の内部には駆動部１６ａによって駆動される
シリンダー１６ｂが有り、このシリンダー１６ｂにはバ
イパス管６の出口側に対向させた凹部１６ｃが形成され
ている。暖房運転時にはシリンダー１６ｂが図２に示す
ような位置に保持されるのでバイパス管６の出口側は密
閉状態となり、一方の孔１７は開放状態となり、絞り手
段４からの液冷媒は内管１４ａと外管１４ｂの両方に流
通する。The body of the refrigerant flow switching means 16 has a substantially cylindrical shape, and has an inner pipe 14a and an outer pipe 14b outside.
A refrigerant pipe 15 from the throttle means 4 and a plurality of connection ports respectively connecting the bypass pipe 6 and a hole 17 for passing the liquid refrigerant from the throttle means 4 to the outer pipe 14b are provided. A cylinder 16b driven by a drive unit 16a is provided inside the cylinder, and a recess 16c facing the outlet side of the bypass pipe 6 is formed in the cylinder 16b. During the heating operation, since the cylinder 16b is held at the position shown in FIG. 2, the outlet side of the bypass pipe 6 is in a closed state, one hole 17 is in an open state, and the liquid refrigerant from the throttle means 4 is in the inner pipe 14a. It distributes to both outer pipes 14b.
【０００９】暖房運転と室外熱交換器５の除霜が同時に
行われる時は室外機制御部１０により駆動部１６ａが制
御されてシリンダー１６ｂが図３に示すような位置に移
動することにより、孔１７はほぼ密閉され、バイパス管
６の出口側と外管１４ｂ間が凹部１６ｃによって結ば
れ、冷媒路が形成される。この状態で電磁弁７が開かれ
るようになっているので外管１４ｂには高温のガス冷媒
が流れ、絞り手段４からの液冷媒は内間１４ａだけを流
通するようになる。このように低温の液冷媒と高温のガ
ス冷媒の流路が二重管により区画され、しかも、高温の
ガス冷媒が外管１４ｂに流されるようになっているので
ガス冷媒の熱を無駄なくフィン１３に伝えることがで
き、これによって室外熱交換器５の除霜を短時間に終わ
らせることができる。When the heating operation and the defrosting of the outdoor heat exchanger 5 are simultaneously performed, the outdoor unit control unit 10 controls the driving unit 16a to move the cylinder 16b to the position shown in FIG. 17 is substantially sealed, and the outlet side of the bypass pipe 6 and the outer pipe 14b are connected by a recess 16c to form a refrigerant passage. Since the solenoid valve 7 is opened in this state, the high temperature gas refrigerant flows through the outer pipe 14b, and the liquid refrigerant from the throttle means 4 flows only through the inner space 14a. In this way, the flow paths of the low-temperature liquid refrigerant and the high-temperature gas refrigerant are divided by the double tube, and the high-temperature gas refrigerant is allowed to flow to the outer tube 14b, so that the heat of the gas refrigerant is not wasted. It is possible to inform the outdoor heat exchanger 5 of this, so that the defrosting of the outdoor heat exchanger 5 can be completed in a short time.
【００１０】[0010]
【発明の効果】以上説明したような空気調和機であるな
らば、室外熱交換器を構成するヘアピン管とその接続管
が二重に構成されていて、暖房運転時に行われる室外熱
交換器の除霜では低温の液冷媒が内管に通され、高温の
ガス冷媒が外管に通されるので、ガス冷媒の熱がフィン
に効果的に伝わり、除霜時間が短くなるとともに、低温
暖房能力および快適性が向上する。According to the air conditioner as described above, the hairpin pipe and the connecting pipe constituting the outdoor heat exchanger are doubled, and the hairpin pipe of the outdoor heat exchanger of the outdoor heat exchanger is operated. In defrost, low-temperature liquid refrigerant is passed through the inner pipe and high-temperature gas refrigerant is passed through the outer pipe, so the heat of the gas refrigerant is effectively transferred to the fins, the defrost time is shortened, and the low-temperature heating capacity is reduced. And comfort is improved.
【図１】本発明および従来例に係わる空気調和機の冷凍
サイクルとその制御系の概略図である。FIG. 1 is a schematic diagram of a refrigeration cycle of an air conditioner and a control system thereof according to the present invention and a conventional example.
【図２】本発明の一実施例を示す室外熱交換器の入口側
と冷媒流切換手段の断面図である。FIG. 2 is a cross-sectional view of an inlet side of an outdoor heat exchanger and a refrigerant flow switching means showing an embodiment of the present invention.
【図３】本発明の一実施例を示す室外熱交換器の入口側
と冷媒流切換手段の断面図である。FIG. 3 is a cross-sectional view of an inlet side of an outdoor heat exchanger and a refrigerant flow switching means showing an embodiment of the present invention.
１ 圧縮機 ２ 四方弁 ３ 室内熱交換器 ４ 絞り手段 ５ 室外熱交換器 ６ バイパス管 ７ 電磁弁 ８ 室外送風機 ９ 室内送風機 13 フィン 14 二重管 １４ａ 内管 １４ｂ 外管 １５ 冷媒管 １６ 冷媒流切換手段 １６ａ 駆動部 １６ｂ シリンダー １６ｃ 凹部 １７ 孔 1 compressor 2 4-way valve 3 indoor heat exchanger 4 throttling means 5 outdoor heat exchanger 6 bypass pipe 7 solenoid valve 8 outdoor blower 9 indoor blower 13 fin 14 double pipe 14a inner pipe 14b outer pipe 15 refrigerant pipe 16 refrigerant flow switching Means 16a Drive part 16b Cylinder 16c Recess 17 Hole
Claims (4)
絞り手段と、室外熱交換器等からなる冷媒回路の、前記
圧縮機の出口側配管と室外熱交換器の暖房運転時入口部
間に電磁弁を備えたバイパス管を設け、暖房運転中に前
記室外熱交換器の除霜を行う時、前記電磁弁を開いて圧
縮機から吐出する高温のガス冷媒の一部を前記室外熱交
換器に導入するようにしてなる空気調和機において、前
記室外熱交換器の冷媒管を内管と外管とからなる二重管
にするとともに、同二重管と、前記絞り手段からの冷媒
管と、前記バイパス管とが一体になる部位に、前記室外
熱交換器の除霜を行う時、前記絞り手段から前記外管に
流入しようとする低温の液冷媒を遮断し、前記バイパス
管よりのガス冷媒を前記外管に導入する冷媒流切換手段
を設けてなる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 bypass pipe provided with a solenoid valve is provided between the outlet side pipe of the compressor and the heating operation inlet portion of the outdoor heat exchanger of the refrigerant circuit including the expansion means and the outdoor heat exchanger and the like. When defrosting the outdoor heat exchanger, in the air conditioner configured to introduce a part of the high-temperature gas refrigerant discharged from the compressor by opening the solenoid valve into the outdoor heat exchanger, the outdoor heat The refrigerant pipe of the exchanger is made into a double pipe consisting of an inner pipe and an outer pipe, and the double pipe, the refrigerant pipe from the throttling means, and the bypass pipe are integrated into a portion where the outdoor heat When the defrosting of the exchanger is performed, a refrigerant flow switching means for cutting off the low-temperature liquid refrigerant that is about to flow into the outer pipe from the throttle means and introducing the gas refrigerant from the bypass pipe into the outer pipe is provided. An air conditioner characterized by becoming.
器を構成する冷媒管の内管と、外管と、前記絞り手段か
らの冷媒管と、前記バイパス管の出口側をそれぞれ接続
する複数の接続口を備えた有底円筒状の本体と、同本体
内を移動するシリンダーと、同シリンダーを駆動する駆
動部とからなる請求項１記載の空気調和機。2. The refrigerant flow switching means connects an inner tube of a refrigerant tube forming the outdoor heat exchanger, an outer tube, a refrigerant tube from the throttle means, and an outlet side of the bypass tube, respectively. The air conditioner according to claim 1, comprising a bottomed cylindrical main body having a plurality of connection ports, a cylinder that moves in the main body, and a drive unit that drives the cylinder.
手段から吐出する液冷媒を前記外管に通す孔を設けてな
る請求項１および２記載の空気調和機。3. The air conditioner according to claim 1, wherein the body of the refrigerant flow switching means is provided with a hole through which the liquid refrigerant discharged from the throttle means passes through the outer pipe.
吐出するガス冷媒を前記外管に案内する凹部を設けてな
る請求項１および２記載の空気調和機。4. The air conditioner according to claim 1, wherein the cylinder is provided with a recess for guiding the gas refrigerant discharged from the bypass pipe to the outer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6055895A JPH08261585A (en) | 1995-03-20 | 1995-03-20 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6055895A JPH08261585A (en) | 1995-03-20 | 1995-03-20 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08261585A true JPH08261585A (en) | 1996-10-11 |
Family
ID=13145734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6055895A Pending JPH08261585A (en) | 1995-03-20 | 1995-03-20 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08261585A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012046947A1 (en) * | 2010-10-06 | 2012-04-12 | Chungju National University Industrial Cooperation Foundation | Heat pump outdoor unit having two rows of coils of dual pipe structure and alternating type heat pump |
| KR101229697B1 (en) * | 2010-10-06 | 2013-02-05 | 한국교통대학교산학협력단 | Outdoor heat exchanger for heat pump and heat pump using the same |
| KR101324906B1 (en) * | 2011-06-23 | 2013-11-04 | 한국교통대학교산학협력단 | Heat pump outdoor machine including two coil of dual pipe structure, Heat pump using the outdoor machine and Method for operating the heat pump |
| KR101353185B1 (en) * | 2012-03-02 | 2014-01-20 | 한국교통대학교산학협력단 | Heat-Pump |
| CN104482684A (en) * | 2014-11-24 | 2015-04-01 | 广东美的制冷设备有限公司 | Cooling/warming air conditioner |
| CN104501452A (en) * | 2014-11-24 | 2015-04-08 | 广东美的制冷设备有限公司 | Cooling and heating air conditioner |
-
1995
- 1995-03-20 JP JP6055895A patent/JPH08261585A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012046947A1 (en) * | 2010-10-06 | 2012-04-12 | Chungju National University Industrial Cooperation Foundation | Heat pump outdoor unit having two rows of coils of dual pipe structure and alternating type heat pump |
| KR101229697B1 (en) * | 2010-10-06 | 2013-02-05 | 한국교통대학교산학협력단 | Outdoor heat exchanger for heat pump and heat pump using the same |
| KR101324906B1 (en) * | 2011-06-23 | 2013-11-04 | 한국교통대학교산학협력단 | Heat pump outdoor machine including two coil of dual pipe structure, Heat pump using the outdoor machine and Method for operating the heat pump |
| KR101353185B1 (en) * | 2012-03-02 | 2014-01-20 | 한국교통대학교산학협력단 | Heat-Pump |
| CN104482684A (en) * | 2014-11-24 | 2015-04-01 | 广东美的制冷设备有限公司 | Cooling/warming air conditioner |
| CN104501452A (en) * | 2014-11-24 | 2015-04-08 | 广东美的制冷设备有限公司 | Cooling and heating air conditioner |
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