JPH0718621B2 - Slow frost operation method of air conditioner - Google Patents
Slow frost operation method of air conditionerInfo
- Publication number
- JPH0718621B2 JPH0718621B2 JP63226780A JP22678088A JPH0718621B2 JP H0718621 B2 JPH0718621 B2 JP H0718621B2 JP 63226780 A JP63226780 A JP 63226780A JP 22678088 A JP22678088 A JP 22678088A JP H0718621 B2 JPH0718621 B2 JP H0718621B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- defrosting
- air conditioner
- electric expansion
- heat exchanger
- 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.)
- Expired - Fee Related
Links
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。Description: TECHNICAL FIELD 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60−10178
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。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。(Prior Art) In a conventional air conditioner, for example, the actual development of Sho 60-10178
The positive cycle hot gas defrosting method is adopted, as described in Japanese Patent Publication No. This defrosting method will be explained based on FIG. 2 for explaining the embodiment of the present application. This is to introduce the discharge gas from the compressor 1 into the outdoor heat exchanger 15 via the bypass pipe 18. However, this is a method of 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 open.
（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側の圧力が低下し、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。(Problems to be solved by the invention) By the way, in the above air conditioner, when defrosting is terminated and normal heating operation is restored, the opening / closing valve 4 is first opened, and then the defrosting opening / closing valve 19 is closed. After that, an operation method in which the electric expansion valve 16 is set to the control opening is adopted, but this method causes a problem that a pressure equalizing noise is generated on the indoor side when the heating operation is returned. This is because the pressure on the indoor heat exchanger 9 side decreases during the defrosting operation, and high-pressure gas flows into such a 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。The present invention has been made to solve the above-mentioned conventional drawbacks, and for that purpose, it is possible to prevent the generation of pressure equalizing noise at the time of returning to the heating operation as described above, thereby improving the comfort of air-conditioning use. It is to provide a defrosting operation method of an air conditioner to be obtained.
（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
弁するようにしてある。(Means for Solving the Problem) Therefore, in the defrosting operation method for an air conditioner of the present invention, the opening / closing valve 4 and the electric expansion valve 16 are closed, and the defrosting opening / closing valve 19 is opened to defrost. On the other hand, when the heating operation is returned, the electric expansion valve 16 is opened, the opening / closing valve 4 is opened, and then the defrosting opening / closing valve 19 is 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側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。(Operation) In the defrosting operation method for the air conditioner, the electric expansion valve 16 is first opened when the heating operation is returned, so that the high pressure on the second liquid pipe 14 side acts on the indoor heat exchanger 9. As a result, the pressure on the indoor side rises. In this case, since the pressure increase on the indoor side is performed through the liquid refrigerant, a large pressure equalizing noise as in the conventional case does not occur. Then, after that, the opening / closing valve 4 is opened and the defrosting opening / closing valve 19 is closed to shift to the 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 of 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
の一方のポートに、開閉弁４を介して接続されている。
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。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。一方、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16よりも室外熱交換器15側の位置との間
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。In FIG. 2, reference numeral 1 denotes an inverter control type compressor, but the discharge pipe 2 of this compressor 1 has a four-way switching valve 3
It is connected to one of the ports via the on-off valve 4.
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 provided with an accumulator 5. A first gas pipe 7 is further connected to the four-way switching valve 3, and the tip portion of the first gas pipe 7 is
8 is branched into a plurality of branch gas pipes 8 ... 8, and indoor heat exchangers 9 ... 9 are connected to the tip ends of the branch gas pipes 8 ... 8, respectively. Each indoor heat exchanger 9 ... 9 has a first electric expansion valve.
10 ... 10 branched liquid pipes 11 ... 11 are connected,
Each of the branch liquid pipes 11 ... 11 joins the first liquid pipe 12. The first liquid pipe 12 includes a liquid receiver 13, a second liquid pipe 14, and an outdoor heat exchanger.
Although 15 are sequentially connected, a second electric expansion valve 16 is interposed in the second liquid pipe 14. In addition, the outdoor heat exchanger 15
A second gas pipe 17 is connected to the second gas pipe 17.
17 is connected to the four-way switching valve 3 to form a refrigerant circulation cycle. On the other hand, a bypass pipe is provided between the position of the discharge pipe 2 closer to the compressor 1 than the on-off valve 4 and the position of the second liquid pipe 14 closer to the outdoor heat exchanger 15 than the second electric expansion valve 16. This bypass pipe 18 connected by 18
An on-off valve 19 for defrosting is provided in this.
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16は全開に
維持されると共に、第１電動膨張弁10…10にて加熱度制
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, the cooling operation is performed by circulating the refrigerant from the outdoor heat exchanger 15 side to the indoor heat exchanger 9 ... 9 side, while the indoor heat exchanger 9 ... 9 side is performed by the outdoor heat exchanger 15 side. Heating operation is performed by circulating the refrigerant to the. During the cooling operation, the second electric expansion valve 16 is kept fully open and the degree of heating is controlled by the first electric expansion valves 10 ... 10, while the first electric expansion valve 10 is operated during the heating operation. The isothermal control is performed at 10, and the 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10、16で上記のような制御が行
われている。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。そしてデフロ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14、
受液器13、第１液管12、各分岐液管11…11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を閉弁する。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。Next, the defrosting operation method of the air conditioner will be described with reference to FIG. During the heating operation, the on-off valve 4 is in the open state, the defrost on-off valve 19 is in the closed state, and the electric expansion valves 10 and 16 perform the above control. When the defrost signal is output in this state, the inverter frequency is first lowered to a predetermined value, then the bypass opening / closing valve 19 is opened, and then the opening / closing valve 4 is closed. Furthermore, after this, the first electric expansion valve 10
10, and then the second electric expansion valve 16 is closed in order, and after these operations are completed, the inverter frequency is increased and defrosting is started. When the defrost completion signal is output, the first and second electric expansion valves 10, ..., 16 are fully opened, and then the inverter frequency is again reduced to a predetermined value. Then, the high pressure on the outdoor side causes the second liquid pipe 14,
It acts on the indoor side through the liquid receiver 13, the first liquid pipe 12, and the respective branch liquid pipes 11 ... 11, thereby increasing the pressure on the indoor side. After such a state is reached, the opening / closing valve 4 is opened, and thereafter, the bypass opening / closing valve 19 is closed. As a result, the refrigerant circulates in the heating cycle. After that, the inverter frequency is increased and the above-mentioned isothermal and superheat control is performed by the electric expansion valves 10 ... is there.
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 on the indoor side can be increased via the liquid refrigerant, and then the high-pressure gas refrigerant can be introduced to the indoor side, thus preventing the generation of pressure equalizing sound as in the conventional case. You will be able to do it.
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 provided with a plurality of indoor heat exchangers 9 ... 9 is shown, but an air conditioner having one indoor heat exchanger 9 can also be implemented in the same manner as above. Of course, in this case, one electric expansion valve is enough. Further, although an example of an air conditioner capable of cooling and heating has been shown above, the same can be applied to an air conditioner capable of only heating operation. Further, the opening / closing valve 4 may be arranged on the first gas pipe 7 side, and may be arranged at any position as long as it is in 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。(Effect of the Invention) In the defrosting operation method for an air conditioner of the present invention, the pressure on the indoor side can be increased via the liquid refrigerant, and then the high-pressure gas refrigerant can be introduced to the indoor side. It is possible to prevent the generation of such pressure-equalizing sound, so that it is possible to improve the comfort of using the air conditioning.
【図面の簡単な説明】 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一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。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a time chart diagram for explaining an embodiment of a defrosting operation method for an air conditioner of the present invention, and FIG. 2 is a refrigerant of an example of an apparatus for carrying out the above method. It is a circuit diagram. 1 ... Compressor, 2 ... Discharge piping, 4 ... Open / close 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
...... Open / close valve for defrost.
Claims (1)
（１）の吐出ガス管（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 provided in a discharge gas pipe (2) (7) of a compressor (1) connected to an indoor heat exchanger (9), and an indoor heat exchanger (9) is provided. The first liquid pipe (12),
The outdoor heat exchanger (15) is connected through the electric expansion valve (16) and the second liquid pipe (14) in sequence, and the outdoor heat exchanger (15) is connected to the suction side of the compressor (1), Further, a bypass pipe (18) in which a discharge gas pipe (2) closer to the compressor (1) than the on-off valve (4) and the second liquid pipe (14) are provided with a defrosting on-off valve (19) In the air conditioner configured by connecting with the above, the opening / closing valve (4) and the electric expansion valve (16) are closed, and the defrosting opening / closing valve (19) is opened to perform defrosting while heating. When returning to operation, the electric expansion valve (16) is opened, the opening / closing valve (4) is opened, and then the defrosting opening / closing valve (19) is closed. Defrosting operation method.
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 JPH0275867A (en) | 1990-03-15 |
| JPH0718621B2 true 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912958B (en) * | 2014-04-10 | 2017-12-01 | 安徽美芝精密制造有限公司 | Control method, control device and the air-conditioning system of air-conditioning system |
| JP6841066B2 (en) * | 2017-02-03 | 2021-03-10 | ダイキン工業株式会社 | A method of using a mixture of fluorinated hydrocarbons as a refrigerant, and a refrigerating device using the mixture as a refrigerant. |
| CN114234368B (en) * | 2021-12-27 | 2023-07-14 | 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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0275867A (en) | 1990-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |