JPH0275867A - Defrosting method for air conditioner - Google Patents
Defrosting method for air conditionerInfo
- Publication number
- JPH0275867A JPH0275867A JP63226780A JP22678088A JPH0275867A JP H0275867 A JPH0275867 A JP H0275867A JP 63226780 A JP63226780 A JP 63226780A JP 22678088 A JP22678088 A JP 22678088A JP H0275867 A JPH0275867 A JP H0275867A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- opened
- room
- defrost
- defrosting
- 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
- 238000010257 thawing Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は空気調和機の除霜運転方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a defrosting operation method for an air conditioner.
（従来の技術）
従来の空気調和機においては、例えば実開昭６０−１０
１７８号公報にも記載されているように、正サイクルホ
ットガスデフロスト方式が採用されている。(Prior art) In conventional air conditioners, for example,
As described in Japanese Patent No. 178, a positive cycle hot gas defrost system is adopted.
このデフロスト方式について、本願の実施例を説明する
ための第２図に基づいて説明すると、これは、圧縮機１
からの吐出ガスを、バイパス管１８を経由して室外熱交
換器１５へと導入し、これにより室外熱交換器１５のデ
フロストを行う方式である。この場合、開閉弁４及び電
動膨張弁１６は閉弁され、デフロスト用開閉弁１９は開
弁された状態にある。This defrost system will be explained based on FIG. 2 for explaining the embodiment of the present application.
This is a system in which the discharged gas is introduced into the outdoor heat exchanger 15 via the bypass pipe 18, thereby defrosting the outdoor heat exchanger 15. In this case, the on-off valve 4 and the electric expansion valve 16 are closed, and the defrost on-off valve 19 is in an open state.
（発明が解決しようとする課題）
ところで上記空気調和機において、デフロストを終了し
、正規の暖房運転に復帰する場合、まず開閉弁４を開弁
し、次いでデフロスト用開閉弁１９を閉弁し、その後電
動膨張弁１６を制御開度となす運転方法が採用されてい
るが、この方法によれば、暖房運転復帰時に室内側に均
圧音が発生するという不具合が生じる。それは、デフロ
スト運転中に、室内熱交換器９例の圧力が低下し、この
ような低圧側に高圧ガスが一挙に流入してくるためであ
る。(Problem to be Solved by the Invention) In the above air conditioner, when defrosting is finished and normal heating operation is resumed, first the on-off valve 4 is opened, then the defrost on-off valve 19 is closed, After that, an operating method has been adopted in which the electric expansion valve 16 is opened to a controlled degree, but according to this method, a problem arises in that pressure equalization noise is generated inside the room when the heating operation is resumed. This is because the pressure in the nine indoor heat exchangers decreases during the defrost operation, and high-pressure gas flows into the low-pressure side all at once.
この発明に上記した従来の欠点を解決するためになされ
たものであって、その目的に、上記のような暖房運転復
帰時における均圧音の発生を防止でき、そのため空調使
用快適性を向上し得る空気調和機の除霜運転方法を提供
することにある。This invention was made in order to solve the above-mentioned conventional drawbacks, and for that purpose, it is possible to prevent the generation of pressure equalization noise when returning to heating operation as described above, thereby improving the comfort of using air conditioning. The purpose of the present invention is to provide a defrosting operation method for an air conditioner.
（課題を解決するための手段）
そこでこの発明の空気調和機の除霜運転方法では、開閉
弁４と電動膨張弁１６とを閉弁すると共に、上記デフロ
スト用開閉弁１９を開弁してデフロストを行う一方、暖
房運転復帰時には、上記電動膨張弁１６を開弁した後で
上記開閉弁４を開弁し、次いで上記デフロスト用開閉弁
１９を閉弁するようにしである。(Means for Solving the Problem) Therefore, in the defrosting operation method for an air conditioner according to the present invention, the on-off valve 4 and the electric expansion valve 16 are closed, and the defrosting on-off valve 19 is opened to defrost the air conditioner. On the other hand, when returning to heating operation, the electric expansion valve 16 is opened, the on-off valve 4 is opened, and the defrost on-off valve 19 is then closed.
（作用）
上記空気調和機の除霜運転方法においては、暖房運転復
帰時には、最初に電動膨張弁１６を開弁することから、
第２液管１４例の高圧が室内熱交換器９に作用し、これ
により室内側の圧力が上昇する。この場合、室内側の圧
力上昇は、液冷媒を介して行われることになるので、従
来のような大きな均圧音は生じない。そしてその後、開
閉弁４を開弁すると共に、デフロスト用開閉弁１９を閉
弁して暖房運転に移行する。(Function) In the air conditioner defrosting operation method described above, when returning to heating operation, the electric expansion valve 16 is first opened.
The high pressure of the second liquid pipes 14 acts on the indoor heat exchanger 9, thereby increasing the pressure on the indoor side. In this case, since the pressure on the indoor side is increased through the liquid refrigerant, the large pressure equalization noise unlike the conventional one does not occur. Thereafter, the on-off valve 4 is opened, and the defrost on-off valve 19 is closed to shift to heating operation.
（実施例）
次にこの発明の空気調和機の除霜運転方法の具体的な実
施例について図面を参照しつつ詳細に説明する。(Example) Next, a specific example of the defrosting operation method for an air conditioner according to the present invention will be described in detail with reference to the drawings.
第２図において、１はインバータ制御方式の圧縮機を示
しているが、この圧縮機１の吐出配管２は四路切換弁３
の一方のボートに、開閉弁４を介して接続されている。In Fig. 2, reference numeral 1 indicates an inverter-controlled compressor, and the discharge pipe 2 of this compressor 1 is connected to a four-way switching valve 3.
is connected to one of the boats via an on-off valve 4.
また上記四路切換弁３の他方のポートは、アキュムレー
タ５の介設された吸込配管６にて圧縮機１の吸込側に接
続されている。The other port of the four-way switching valve 3 is connected to the suction side of the compressor 1 through a suction pipe 6 in which an accumulator 5 is interposed.
上記四路切換弁３にはさらに第１ガス管７が接続されて
いるが、この第１ガス管７の先端部は、複数の分岐ガス
管８・・８に分岐しており、、各分岐ガス管８・・８の
先端部にそれぞれ室内熱交換器９・・９が接続されてい
る。各室内熱交換器９・・９には、第１電動膨張弁１０
・・１０の介設された分岐液管１１・・１１が接続され
ており、各分岐液管１１・・１１は、第１液管１２に合
流している。この第１液管１２には、受液器１３、第２
液管１４、室外熱交換器１５が順次接続されているが、
上記第２液管１４には第２電動膨張弁１６が介設されて
いる。また上記室外熱交換器１５には、第２ガス管１７
が接続されており、この第２ガス管１７が上記四路切換
弁３に接続され、これにより冷媒循環サイクルが構成さ
れている。−方、上記吐出配管２の開閉弁４よりも圧縮
機１側の位置と、上記第２液管１４の第２電動膨張弁１
６よりも室外熱交換器１５例の位置との間は、バイパス
管１８によって接続され、このバイパス管１８には、デ
フロスト用開閉弁１９が介設されている。A first gas pipe 7 is further connected to the four-way switching valve 3, and the tip of the first gas pipe 7 branches into a plurality of branch gas pipes 8...8. Indoor heat exchangers 9...9 are connected to the tips of the gas pipes 8...8, respectively. Each indoor heat exchanger 9...9 has a first electric expansion valve 10.
...10 interposed branch liquid pipes 11...11 are connected, and each branch liquid pipe 11...11 joins the first liquid pipe 12. This first liquid pipe 12 includes a liquid receiver 13 and a second liquid receiver 13 .
Although the liquid pipe 14 and the outdoor heat exchanger 15 are connected in sequence,
A second electric expansion valve 16 is interposed in the second liquid pipe 14 . Further, the outdoor heat exchanger 15 includes a second gas pipe 17.
This second gas pipe 17 is connected to the four-way switching valve 3, thereby forming a refrigerant circulation cycle. - side, the position of the discharge pipe 2 closer to the compressor 1 than the on-off valve 4, and the second electric expansion valve 1 of the second liquid pipe 14.
6 and 15 outdoor heat exchangers are connected by a bypass pipe 18, and a defrost on-off valve 19 is interposed in this bypass pipe 18.
上記空気調和機においては、室外熱交換器１５側から室
内熱交換器９・・９側へと冷媒を回流させることによっ
て冷房運転を行う一方、室内熱交換器９・・９側から室
外熱交換器１５へと冷媒を回流させることによって暖房
運転を行う。冷房運転中においては、第２電動膨張弁１
６は全開に維持されると共に、第１電動膨張弁１０・・
１０にて過熱度制御が行われ、一方暖房運転中において
は、第１電動膨張弁１０・・１０にて等温制御が行われ
ると共に、第２電動膨張弁１６によって過熱度制御が行
われる。In the above air conditioner, cooling operation is performed by circulating refrigerant from the outdoor heat exchanger 15 side to the indoor heat exchanger 9 side, while outdoor heat exchange is performed from the indoor heat exchanger 9 side to the indoor heat exchanger 9 side. Heating operation is performed by circulating the refrigerant to the container 15. During cooling operation, the second electric expansion valve 1
6 is maintained fully open, and the first electric expansion valve 10...
10, superheat degree control is performed, while during heating operation, isothermal control is performed by the first electric expansion valves 10, . . . 10, and superheat degree control is performed by the second electric expansion valve 16.
次に上記空気調和機の除霜運転方法について、第１図に
基づいて説明する。暖房運転中においては、開閉弁４は
開弁状態にあると共に、デフロスト用開閉弁１９は閉弁
状態にあり、各電動膨張弁ｌ０１１６で上記のような制
御が行われている。Next, a defrosting operation method for the air conditioner will be explained based on FIG. 1. During the heating operation, the on-off valve 4 is in an open state, the defrost on-off valve 19 is in a closed state, and each electric expansion valve l0116 is controlled as described above.
この状態でデフロスト信号が出力されると、まず最初に
インバータ周波数を所定値まで低下させ、その後、バイ
パス用開閉弁１９を開弁し、次いで開閉弁４を閉弁する
。またさらにこの後、第１電動膨張弁１０・・１０を、
次いで第２電動膨張弁１６を順に閉弁し、これらの操作
が完了した後、インバータ周波数を上昇させてデフロス
トを開始する。そしてデフコスト完了信号が出力される
と、第１及び第２電動膨張弁１０・・１０．１６を全開
状態にし、その後、インバータ周波数を再度、所定値ま
で低下させる。そうすると室外側の高圧が、第２液管１
４、受液器１３、第１液管１２、各分岐液管１１・・１
１を介して室内側に作用し、これにより室内側の圧力が
上昇する。このような状態になった後で、開閉弁４を開
弁し、さらにその後、バイパス用開閉弁１９を開弁する
。これにより冷媒は、暖房サイクルにて循環することに
なる訳であり、この後インバータ周波数を上昇させると
共に、各電動膨張弁１０・・１０．１６にて上記等温及
び過熱度制御を行うようにするのである。When the defrost signal is output in this state, the inverter frequency is first lowered to a predetermined value, then the bypass on-off valve 19 is opened, and then the on-off valve 4 is closed. Furthermore, after this, the first electric expansion valve 10...10,
Next, the second electric expansion valves 16 are sequentially closed, and after these operations are completed, the inverter frequency is increased to start defrosting. When the differential cost completion signal is output, the first and second electric expansion valves 10, . Then, the high pressure outside the room will be reduced to the second liquid pipe 1.
4, liquid receiver 13, first liquid pipe 12, each branch liquid pipe 11...1
1 on the indoor side, thereby increasing the pressure on the indoor side. After reaching such a state, the on-off valve 4 is opened, and then the bypass on-off valve 19 is opened. As a result, the refrigerant is circulated in the heating cycle, and then the inverter frequency is increased, and the above-mentioned isothermal and superheat control is performed using each electric expansion valve 10...10.16. It is.
上記のような運転方法によれば、室内側の圧力を液冷媒
を介して上昇させ、その後、高圧ガス冷媒を室内側に導
入することができるので、従来のような均圧音の発生を
防止し得ることになる。According to the above operating method, the pressure inside the room is increased through the liquid refrigerant, and then the high-pressure gas refrigerant can be introduced into the room, which prevents the generation of pressure equalization noise as in the past. It will be possible.
なお上記実施例では複数台の室内熱交換器９・・９を備
えた空気調和機の例を示したが、１台の室内熱交換器９
を有する空気調和機においても上記同様に実施可能であ
り、当然にこの場合には、電動膨張弁も１台でよいこと
になる。また上記では冷暖可能な空気調和機の例を示し
ているが、暖房運転のみが可能な空気調和機においても
、同様に実施可能である。さらに開閉弁４を第１ガス管
７側に配置してもよく、吐出配管２と第１ガス管７とに
よって構成される吐出ガス管内であれば、いずれの位置
に配置してもよい。In the above embodiment, an example of an air conditioner equipped with a plurality of indoor heat exchangers 9...9 was shown, but one indoor heat exchanger 9
The above-mentioned method can also be implemented in an air conditioner having the following.In this case, of course, only one electric expansion valve is required. Furthermore, although an example of an air conditioner capable of cooling and heating is shown above, the present invention can be implemented in the same manner with an air conditioner capable of only heating operation. Further, the on-off valve 4 may be arranged on the first gas pipe 7 side, or may be arranged at any position within the discharge gas pipe constituted by the discharge pipe 2 and the first gas pipe 7.
（発明の効果）
この発明の空気調和機の除霜運転方法においては、室内
側の圧力を液冷媒を介して上昇させ、その後、高圧ガス
冷媒を室内側に導入することができるので、従来のよう
な均圧音の発生を防止し得ることになり、そのため空調
使用快適性を向上することが可能となる。(Effects of the Invention) In the defrosting operation method for an air conditioner according to the present invention, the pressure inside the room can be increased through the liquid refrigerant, and then the high-pressure gas refrigerant can be introduced into the room. This makes it possible to prevent the occurrence of such pressure equalization noise, thereby making it possible to improve the comfort of using the air conditioner.
第１図はこの発明の空気調和機の除霜運転方法の一実施
例を説明するためのタイムチャート図、第２図は上記方
法を実施するための装置−例の冷媒回路図である。
１・・・圧縮機、２・・・吐出配管、４・・・開閉弁、
７・・・第１ガス管、９・・・室内熱交換器、１０・・
・第１電動膨張弁、１４・・・第２液管、１５・・・室
外熱交換器、１６・・・第２電動膨張弁、１７・・・第
２ガス管、１８・・・バイパス管、１９・・・デフロス
ト用開閉弁。FIG. 1 is a time chart for explaining an embodiment of the defrosting operation method for an air conditioner according to the present invention, and FIG. 2 is a refrigerant circuit diagram of an example of an apparatus for carrying out the above method. 1...Compressor, 2...Discharge piping, 4...Opening/closing valve,
7... First gas pipe, 9... Indoor heat exchanger, 10...
・First electric expansion valve, 14... Second liquid pipe, 15... Outdoor heat exchanger, 16... Second electric expansion valve, 17... Second gas pipe, 18... Bypass pipe , 19...Defrost on-off valve.
Claims (1)
出ガス管（２）（７）に開閉弁（４）を介設すると共に
、室内熱交換器（９）には第１液管（１２）、電動膨張
弁（１６）、第２液管（１４）を順次介して室外熱交換
器（１５）を接続し、この室外熱交換器（１５）を圧縮
機（１）の吸込側に接続し、さらに上記開閉弁（４）よ
りも圧縮機（１）側の吐出ガス管（２）と上記第２液管
（１４）とをデフロスト用開閉弁（１９）の介設された
バイパス管（１８）にて接続して成る空気調和機におい
て、上記開閉弁（４）と電動膨張弁（１６）とを閉弁す
ると共に、上記デフロスト用開閉弁（１９）を開弁して
デフロストを行う一方、暖房運転復帰時には、上記電動
膨張弁（１６）を開弁した後で上記開閉弁（４）を開弁
し、次いで上記デフロスト用開閉弁（１９）を閉弁する
ことを特徴とする空気調和機の除霜運転方法。1. An on-off valve (4) is installed in the discharge gas pipes (2) and (7) of the compressor (1) connected to the indoor heat exchanger (9), and a first liquid is connected to the indoor heat exchanger (9). An outdoor heat exchanger (15) is connected through the pipe (12), electric expansion valve (16), and second liquid pipe (14) in this order, and this outdoor heat exchanger (15) is connected to the suction of the compressor (1). A defrost on-off valve (19) is connected to the discharge gas pipe (2) on the compressor (1) side of the on-off valve (4) and the second liquid pipe (14). In an air conditioner connected by a bypass pipe (18), the on-off valve (4) and the electric expansion valve (16) are closed, and the defrost on-off valve (19) is opened to perform defrosting. On the other hand, when returning to heating operation, the electric expansion valve (16) is opened, the on-off valve (4) is opened, and the defrost on-off valve (19) is then closed. How to defrost an air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63226780A JPH0718621B2 (en) | 1988-09-09 | 1988-09-09 | Slow frost operation method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63226780A JPH0718621B2 (en) | 1988-09-09 | 1988-09-09 | Slow frost operation method of air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0275867A true JPH0275867A (en) | 1990-03-15 |
| JPH0718621B2 JPH0718621B2 (en) | 1995-03-06 |
Family
ID=16850495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63226780A Expired - Fee Related JPH0718621B2 (en) | 1988-09-09 | 1988-09-09 | Slow frost operation method of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0718621B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912958A (en) * | 2014-04-10 | 2014-07-09 | 安徽美芝精密制造有限公司 | Air conditioning system control method, air conditioning system control device and air conditioning system |
| JP2018123287A (en) * | 2017-02-03 | 2018-08-09 | ダイキン工業株式会社 | Method using mixture of fluorinated hydrocarbon as coolant, and cooling device using the mixture as coolant |
| CN114234368A (en) * | 2021-12-27 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method, control device, and nonvolatile storage medium |
-
1988
- 1988-09-09 JP JP63226780A patent/JPH0718621B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912958A (en) * | 2014-04-10 | 2014-07-09 | 安徽美芝精密制造有限公司 | Air conditioning system control method, air conditioning system control device and air conditioning system |
| JP2018123287A (en) * | 2017-02-03 | 2018-08-09 | ダイキン工業株式会社 | Method using mixture of fluorinated hydrocarbon as coolant, and cooling device using the mixture as coolant |
| US10988652B2 (en) | 2017-02-03 | 2021-04-27 | Daikin Industries, Ltd. | Method for using a mixture of fluorinated hydrocarbons as a refrigerant, and a refrigeration unit using the mixture as a refrigerant |
| CN114234368A (en) * | 2021-12-27 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method, control device, and nonvolatile storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0718621B2 (en) | 1995-03-06 |
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