JPS62252862A - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JPS62252862A JPS62252862A JP9087386A JP9087386A JPS62252862A JP S62252862 A JPS62252862 A JP S62252862A JP 9087386 A JP9087386 A JP 9087386A JP 9087386 A JP9087386 A JP 9087386A JP S62252862 A JPS62252862 A JP S62252862A
- Authority
- JP
- Japan
- Prior art keywords
- outdoor
- indoor
- heat exchanger
- valve
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 description 26
- 239000003507 refrigerant Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ヒートポンプ式空気調和装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat pump type air conditioner.
（従来の技術）
室外ユニットと室内ユニットとが比較的離れた位置に設
置されているヒートポンプ式空気調和装置においては、
室外ユニットと室内ユニットとを連絡する連絡配管が比
較的長くなる。このような連絡配管の長い空気調和装置
において、減圧機構として作用する電動弁を室外ユニッ
トと室内ユニットとの両方に設けるようにしたものがあ
る。(Prior Art) In a heat pump type air conditioner in which an outdoor unit and an indoor unit are installed at a relatively distant position,
The connecting piping that connects the outdoor unit and the indoor unit becomes relatively long. Among such air conditioners having long connecting pipes, there is one in which an electric valve that functions as a pressure reducing mechanism is provided in both the outdoor unit and the indoor unit.
（発明が解決しようとする問題点）
上記の如く構成する場合、圧縮機停止中においては、冷
媒回路中における液移動を防止するために、蒸発器とし
て作用している熱交換器（即ち、冷房時には室外熱交換
器、暖房時には室内熱交換器）の手前で液ラインを閉鎖
する必要があるが、圧縮機停止中に室内外の電動弁を全
閉にすると、その間の液ライン（連絡配管を含む）が液
封状態となる。このようにして、連絡配管を含む液ライ
ンが液封状態となると、周囲温度の上昇とともに著しく
内圧が上昇するという不具合が生ずる。このことは、連
絡配管が比較的長いものにおいて特に顕著となる。(Problems to be Solved by the Invention) When configured as described above, when the compressor is stopped, in order to prevent liquid movement in the refrigerant circuit, the heat exchanger (i.e., the cooling Sometimes it is necessary to close the liquid line before the outdoor heat exchanger (for heating, the indoor heat exchanger for heating), but if the indoor and outdoor electric valves are fully closed while the compressor is stopped, the liquid line between them (the connecting piping) can be closed. ) becomes a liquid seal state. In this way, when the liquid line including the connecting pipe becomes liquid-sealed, a problem arises in that the internal pressure rises significantly as the ambient temperature rises. This is particularly noticeable when the connecting piping is relatively long.
本発明は、上記の点に鑑みてなされたしので、圧縮機停
止中において、液封状態となっている液ラインから凝縮
器として作用していた熱交換器側へ冷媒を僅かづつ流通
せしめ得るようにし、以って、液ラインの液封状態を解
消せしめることを目的とするものである。The present invention has been made in view of the above points, and therefore, when the compressor is stopped, refrigerant can be made to flow little by little from the liquid line that is in a liquid-sealed state to the heat exchanger that is functioning as a condenser. The purpose of this is to eliminate the liquid-sealed state of the liquid line.
（問題点を解決するための手段）
本発明では、上記問題点を解決するための手段として、
図面に示すように、圧縮機３、四路切換弁４、室外熱交
換器５および室外側電動弁６を備えた室外ユニットｌに
対して、室内側電動弁７および室内熱交換器８を備えた
室内ユニット２を接続してなるヒートポンプ式空気調和
装置において、前記圧縮機３の停止時に蒸発器として作
用している熱交換器から遠い側に位置する電動弁の開度
を全開に近い一定開度に固定する如く作用する開度制御
装置ＩＯを付設している。(Means for solving the problems) In the present invention, as means for solving the above problems,
As shown in the drawings, an outdoor unit l equipped with a compressor 3, a four-way switching valve 4, an outdoor heat exchanger 5, and an outdoor electric valve 6 is provided with an indoor electric valve 7 and an indoor heat exchanger 8. In a heat pump type air conditioner in which an indoor unit 2 is connected, when the compressor 3 is stopped, the electric valve located on the side far from the heat exchanger acting as an evaporator is kept open at a constant level close to full open. An opening control device IO is attached which acts to fix the opening degree.
（作 用）
本発明では、上記手段によって次のような作用が得られ
る。(Function) In the present invention, the following effects can be obtained by the above means.
即ち、空気調和装置運転中に圧縮機３が停止ずろと、通
常室外および室内電動弁６．７は、全開状態とされるが
、本発明によれば、蒸発器として作用している熱交換器
（冷房時には室内熱交換器８、暖房時には室外熱交換器
５）から遠い側に位置する電動弁（冷房時には室外側電
動弁６、暖房時には室内側電動弁７）の開度が、全開に
近い一定開度に固定されるため、両型動弁６，７間の液
ラインに存在する液冷媒が、室外側電動弁６あるいは室
内側電動弁７を介して僅かづつ流通せしめられることと
なり、液封による圧力上昇が効果的に防止される。That is, when the compressor 3 stops during operation of the air conditioner, the outdoor and indoor motorized valves 6.7 are normally in a fully open state, but according to the present invention, the heat exchanger functioning as an evaporator (Indoor heat exchanger 8 during cooling, outdoor heat exchanger 5 during heating) The opening degree of the motorized valve (outdoor motorized valve 6 during cooling, indoor motorized valve 7 during heating) located on the far side is close to fully open. Since the opening degree is fixed at a constant degree, the liquid refrigerant existing in the liquid line between the two types of valves 6 and 7 is allowed to flow little by little via the outdoor motorized valve 6 or the indoor motorized valve 7. Pressure increase due to sealing is effectively prevented.
（実施例）
以下、第１図および第２図を参照して、本発明の好適な
実施例を説明する。(Example) Hereinafter, a preferred example of the present invention will be described with reference to FIGS. 1 and 2.
本実施例のヒートポンプ式空気調和装置は、第１図図示
のように、圧縮機３、四路切換弁４、室外熱交換器５、
室外側電動弁６、室内側電動弁７、室内熱交換器８およ
びアキュムレータ９を順次接続してなる１室用冷媒回路
を複数サイクル備えている。即ち、前記圧縮機３、四路
切換弁４、室外熱交換器５、室外側電動弁６およびアキ
ュー′４Ｌｚ−タ９からなる室外ユニット１に対して、
室内側電動弁７および室内熱交換器８をそれぞれ備えた
複数台の室外ユニッ）１，１を連絡配管ｔ １．１ ｔ
・・・を介して接続することによって構成されている。As shown in FIG. 1, the heat pump type air conditioner of this embodiment includes a compressor 3, a four-way switching valve 4, an outdoor heat exchanger 5,
A refrigerant circuit for one room is provided with multiple cycles in which an outdoor motor-operated valve 6, an indoor motor-operated valve 7, an indoor heat exchanger 8, and an accumulator 9 are sequentially connected. That is, for the outdoor unit 1 consisting of the compressor 3, the four-way switching valve 4, the outdoor heat exchanger 5, the outdoor electric valve 6, and the accu-torter 9,
A plurality of outdoor units each equipped with an indoor electric valve 7 and an indoor heat exchanger 8) 1, 1 are connected via piping t 1.1 t
It is configured by connecting through...
本実施例においては、室外ユニットｌと室内ユニット２
とが離れた位置に設置されており、前記連絡配管１１と
しては、比較的長いものが用いられている。そして、上
記冷媒回路において、冷媒は、冷房運転時には実線矢印
で示す方向に、暖房運転時には点線矢印で示す方向に循
環仕しめられるようになっている。In this embodiment, the outdoor unit 1 and the indoor unit 2 are
The connecting pipe 11 is installed at a position separated from the connecting pipe 11, and a relatively long one is used. In the refrigerant circuit, the refrigerant is circulated in the direction shown by the solid line arrow during cooling operation and in the direction shown by the dotted line arrow during heating operation.
前記電動弁６．７としては、２５０ステツプの開度調節
を行うことのできる開度調節可能なものが用いられてお
り、本実施例の場合、それぞれが冷房用および暖房用の
膨張機構を兼用している。The motor-operated valves 6.7 are those whose opening can be adjusted in 250 steps, and in the case of this embodiment, each serves as an expansion mechanism for cooling and heating. are doing.
本実施例のヒートポンプ式空気調和装置における電動弁
６．７は、後述するような作用を有する開度制御装置Ｉ
Ｏによって制御されるようになっている。The electric valve 6.7 in the heat pump type air conditioner of this embodiment is an opening control device I having the function described below.
It is controlled by O.
この開度制御装置ＩＯは、四路切換弁４の切換信号およ
び圧縮機３のＯＮ、ＯＦＦ信号を受けて、前記電動弁６
．７の開度を適宜の開度に制御する作用を有している。This opening control device IO receives the switching signal of the four-way switching valve 4 and the ON/OFF signal of the compressor 3, and receives the switching signal of the four-way switching valve 4 and the ON/OFF signal of the compressor 3.
．． It has the function of controlling the opening degree of No. 7 to an appropriate opening degree.
次いで図示のヒートポンプ式空気調和装置の作用を第２
図図示のフローチャートを参照して説明する。Next, the action of the illustrated heat pump type air conditioner will be explained in a second manner.
This will be explained with reference to the illustrated flowchart.
（Ｉ）冷房運転時
冷房運転時には、室外熱交換器５は凝縮器として作用し
、室内熱交換器８は蒸発器として作用している。そのと
き、圧縮機３が駆動されていると（ステップＳｔ）、前
記開度制御装置１０によって、室外側電動弁６は全閉と
される一方、室内側電動弁７は減圧機構として作用すべ
く開度制御（ＳＨ制御）されている（ステップＳ３）。(I) During cooling operation During cooling operation, the outdoor heat exchanger 5 acts as a condenser, and the indoor heat exchanger 8 acts as an evaporator. At that time, when the compressor 3 is being driven (step St), the outdoor electric valve 6 is fully closed by the opening degree control device 10, while the indoor electric valve 7 is set to act as a pressure reducing mechanism. The opening degree is controlled (SH control) (step S3).
この時の余剰冷媒はアキュムレータ９に溜る。そして、
該冷房運転中に圧縮機３が停止すると（ステップｓＪ、
前記開度制御装置ＩＯによって、室外側電動弁６は全開
に近い一定開度とされろ一方、室内側電動弁７は全閉と
される（ステップＳＳ）。従って、連絡配管１１を含む
液ラインの液冷媒が室外側電動弁６を介して僅かづつ流
通することとなり、液ラインへの液封によって生じてい
た圧力上昇を解消することができるのである。Excess refrigerant at this time accumulates in the accumulator 9. and,
When the compressor 3 stops during the cooling operation (step sJ,
The opening control device IO causes the outdoor motor-operated valve 6 to maintain a constant opening close to fully open, while the indoor motor-operated valve 7 to fully close (step SS). Therefore, the liquid refrigerant in the liquid line including the connecting pipe 11 flows little by little through the outdoor electric valve 6, and it is possible to eliminate the pressure increase caused by the liquid seal in the liquid line.
（ＩＩ）暖房運転時
暖房運転時には、室外熱交換器５は蒸発器として作用し
、室内熱交換器８は凝縮器として作用している。そのと
き、圧縮機３が駆動されていると（ステップＳ？）、前
記開度′制御装置ｌＯによって、室外側電動弁６は減圧
機構として作用すべく開度制御（ＳＨ制御）される一方
、室内側電動弁７は全開とされている（ステップＳ８）
。そして、該暖房運転中に圧縮機３が停止すると（ステ
ップＳ７）、前記開度制御装置ＩＯによって、室外側電
動弁６は全開とされる一方、室内側電動弁７は全閉に辻
い一定開度とされる（ステップＳ、、）。従って、室内
側電動弁７がバイパスキャピラリーの機能を果たし、連
絡配管１１を含む液ラインの液冷媒が室内側電動弁７を
介して僅かづつ流通することとなり、液ラインへの液封
によって生じていた圧力上昇を解消することができるの
である。(II) During heating operation During heating operation, the outdoor heat exchanger 5 acts as an evaporator, and the indoor heat exchanger 8 acts as a condenser. At that time, when the compressor 3 is being driven (step S?), the opening degree of the outdoor motor-operated valve 6 is controlled (SH control) by the opening degree control device IO to act as a pressure reducing mechanism. The indoor electric valve 7 is fully opened (step S8).
. When the compressor 3 stops during the heating operation (step S7), the outdoor electric valve 6 is fully opened by the opening control device IO, while the indoor electric valve 7 is kept fully closed. The opening degree is determined (step S, , ). Therefore, the indoor electric valve 7 functions as a bypass capillary, and the liquid refrigerant in the liquid line including the connecting pipe 11 flows little by little through the indoor electric valve 7, causing the liquid refrigerant to flow due to the liquid seal in the liquid line. This eliminates the pressure increase that occurs.
上記せる如く、圧縮機３の停止時に、蒸発器と１、て作
用している熱交換器（冷房時には室内熱交換器８、暖房
時には室外熱交換器５）から遠い側に位置する電動弁（
冷房時には室外側電動弁６、暖房時には室内側電動弁７
）の開度が、全閉近い一定開度に固定されるため、両型
動弁６，７間の液ラインに存在する液冷媒が、室外側電
動弁６あるいは室内側電動弁７を介して僅かづつ流通せ
しめられることとなり、液封による圧力上昇が効果的に
防止されるのである。As mentioned above, when the compressor 3 is stopped, the electric valve (
Outdoor motorized valve 6 for cooling, indoor motorized valve 7 for heating
) is fixed at a constant opening close to fully closed, so that the liquid refrigerant present in the liquid line between the two types of valves 6 and 7 flows through the outdoor motor-operated valve 6 or the indoor motor-operated valve 7. The liquid is allowed to flow little by little, effectively preventing pressure rise due to liquid sealing.
本発明は、図示の実施例に限定されるものではなく、発
明の要旨を逸脱しない範囲において適宜設計変更可能な
ことは勿論である。It goes without saying that the present invention is not limited to the illustrated embodiments, and that the design can be modified as appropriate without departing from the gist of the invention.
（発明の効果）
蒸上の如く、本発明によれば、ヒートポンプ式空気調和
装置において、圧縮機３の停止時に蒸発器として作用し
ている熱交換器（冷房時には室内熱交換器８、暖房時に
は室外熱交換器５）から遠い側に位置する電動弁（冷房
時には室外側電動弁６、暖房時には室内側電動弁７）の
開度を、全閉に近い一定開度に固定するようにしたので
、両型動弁６．７間の液ラインに存在する液冷媒が、室
外側電動弁６あるいは室内側電動弁７を介して僅かづつ
流通せしめられることとなり、液封防止用のバイパス回
路等を設けることなく、液封による圧力上昇を効果的に
防止することができろという実用的な効果がある。(Effects of the Invention) As described above, according to the present invention, in a heat pump type air conditioner, the heat exchanger functioning as an evaporator when the compressor 3 is stopped (the indoor heat exchanger 8 during cooling, and the indoor heat exchanger 8 during heating) The opening degree of the electric valve located far from the outdoor heat exchanger 5) (outdoor electric valve 6 for cooling, indoor electric valve 7 for heating) is fixed at a constant opening close to fully closed. The liquid refrigerant existing in the liquid line between the two types of valves 6 and 7 is allowed to flow little by little through the outdoor motorized valve 6 or the indoor motorized valve 7, and a bypass circuit to prevent liquid sealing is required. It has the practical effect of being able to effectively prevent a pressure increase due to liquid sealing without having to provide one.
第１図は、本発明の実施例にがかるヒートポンプ式空気
調和装置の冷媒回路図、第２図は、本発明の実施例にが
かるヒートポンプ式空気調和装置の作用を示すフローチ
ャートである。
ｌ ・・・・・・室外ユニット
２ ・・・・・・室内ユニット
３・・・・・・圧縮機
４・・・・・・四路切換弁
５・・・・・・室外熱交換器
６・・・・・・室外側電動弁
７・・・・・・室内側電動弁
８ ・・・・・・室内熱交換器
１０ ・・・・・開度制御装置FIG. 1 is a refrigerant circuit diagram of a heat pump air conditioner according to an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the heat pump air conditioner according to an embodiment of the present invention. l...Outdoor unit 2...Indoor unit 3...Compressor 4...Four-way switching valve 5...Outdoor heat exchanger 6 ......Outdoor motorized valve 7...Indoor motorized valve 8...Indoor heat exchanger 10...Opening degree control device
Claims (1)
５）および室外側電動弁（６）を備えた室外ユニット（
１）に対して、室内側電動弁（７）および室内熱交換器
（８）を備えた室内ユニット（２）を接続してなるヒー
トポンプ式空気調和装置において、前記圧縮機（３）の
停止時に蒸発器として作用している熱交換器から遠い側
に位置する電動弁の開度を全閉に近い一定開度に固定す
る如く作用する開度制御装置（１０）を付設したことを
特徴とするヒートポンプ式空気調和装置。1. Compressor (3), four-way switching valve (4), outdoor heat exchanger (
5) and an outdoor unit equipped with an outdoor electric valve (6) (
In contrast to 1), in a heat pump air conditioner in which an indoor unit (2) equipped with an indoor electric valve (7) and an indoor heat exchanger (8) is connected, when the compressor (3) is stopped, The valve is characterized by being equipped with an opening control device (10) that acts to fix the opening of the electric valve located on the far side from the heat exchanger acting as an evaporator to a constant opening close to fully closed. Heat pump type air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9087386A JPH0723815B2 (en) | 1986-04-19 | 1986-04-19 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9087386A JPH0723815B2 (en) | 1986-04-19 | 1986-04-19 | Heat pump type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62252862A true JPS62252862A (en) | 1987-11-04 |
| JPH0723815B2 JPH0723815B2 (en) | 1995-03-15 |
Family
ID=14010617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9087386A Expired - Lifetime JPH0723815B2 (en) | 1986-04-19 | 1986-04-19 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723815B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263028A (en) * | 1989-04-03 | 1990-10-25 | Daikin Ind Ltd | Operation control device for air conditioning equipment |
-
1986
- 1986-04-19 JP JP9087386A patent/JPH0723815B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263028A (en) * | 1989-04-03 | 1990-10-25 | Daikin Ind Ltd | Operation control device for air conditioning equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0723815B2 (en) | 1995-03-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |