阅读说明：本技术 空调器及其控制方法和装置 (Air conditioner and control method and device thereof ) 是由 杨坤 罗彬� 于 2020-04-29 设计创作，主要内容包括：本发明提出一种空调器及其控制方法和装置,所述空调器包括室外机、室内机、设置在低压气管上的第一调节阀、高压气管上的第二调节阀、及高压液管上的第三调节阀和过冷换热器,过冷换热器主路的输入端与室外机连接,输出端与第三调节阀的输入端连接,第三调节阀的输出端与室内机连接,过冷换热器辅路的输入端通过第四调节阀与过冷换热器主路的输出端连接,输出端与第一调节阀的输出端连接,所述控制方法包括：获取室内冷媒泄露信号；依次控制第四调节阀、第三调节阀和第二调节阀关闭；控制第一调节阀打开至预设的最大开度并维持第一设定时间；控制第一调节阀关闭,从而能够在室内侧冷媒泄露时使得未发生泄漏的室内机仍然能够不受影响的继续运行。(The invention provides an air conditioner and a control method and a device thereof, the air conditioner comprises an outdoor unit, an indoor unit, a first regulating valve arranged on a low-pressure air pipe, a second regulating valve arranged on a high-pressure air pipe, a third regulating valve arranged on a high-pressure liquid pipe and a supercooling heat exchanger, wherein the input end of a main circuit of the supercooling heat exchanger is connected with the outdoor unit, the output end of the main circuit of the supercooling heat exchanger is connected with the input end of the third regulating valve, the output end of the third regulating valve is connected with the indoor unit, the input end of an auxiliary circuit of the supercooling heat exchanger is connected with the output end of the main circuit of the supercooling heat exchanger through a fourth: acquiring an indoor refrigerant leakage signal; the fourth regulating valve, the third regulating valve and the second regulating valve are controlled to be closed in sequence; controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining the first set time; the first regulating valve is controlled to be closed, so that the indoor unit which does not leak can still continue to operate unaffected when the indoor side refrigerant leaks.)

1. A control method of an air conditioner, the air conditioner comprising an outdoor unit, an indoor unit, a first regulating valve disposed on a low pressure gas pipe, a second regulating valve disposed on a high pressure gas pipe, a third regulating valve disposed on a high pressure liquid pipe, and a supercooling heat exchanger, wherein an input end of a main circuit of the supercooling heat exchanger is connected to the outdoor unit, an output end of the main circuit of the supercooling heat exchanger is connected to an input end of the third regulating valve, an output end of the third regulating valve is connected to the indoor unit, an input end of an auxiliary circuit of the supercooling heat exchanger is connected to an output end of the main circuit of the supercooling heat exchanger through a fourth regulating valve, and an output end of the auxiliary circuit of the supercooling heat exchanger is connected to an output end of the first regulating valve, the control method comprising:

acquiring an indoor refrigerant leakage signal;

the fourth regulating valve, the third regulating valve and the second regulating valve are controlled to be closed in sequence;

controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining for a first set time;

and controlling the first regulating valve to be closed.

2. The control method according to claim 1, characterized by further comprising:

and in the oil return or defrosting process of the air conditioner, controlling the fourth regulating valve to be opened to a preset maximum opening degree.

3. The control method according to claim 1, characterized by further comprising:

and if the air conditioner does not return oil or defrost within the second set time, controlling the air conditioner to stop.

4. The control method of claim 1, wherein the air conditioner further comprises a fifth regulating valve, an input of the fifth regulating valve being connected to an input of the second regulating valve, an output of the fifth regulating valve being connected to an output of the first regulating valve, the control method further comprising:

if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve to be opened and maintaining the third set time;

and controlling the fifth regulating valve to be closed.

5. A control apparatus of an air conditioner, the air conditioner comprising an outdoor unit, an indoor unit, a first regulating valve disposed on a low pressure gas pipe, a second regulating valve disposed on a high pressure gas pipe, a third regulating valve disposed on a high pressure liquid pipe, and a supercooling heat exchanger, wherein an input end of a main circuit of the supercooling heat exchanger is connected to the outdoor unit, an output end of the main circuit of the supercooling heat exchanger is connected to an input end of the third regulating valve, an output end of the third regulating valve is connected to the indoor unit, an input end of an auxiliary circuit of the supercooling heat exchanger is connected to an output end of the main circuit of the supercooling heat exchanger through a fourth regulating valve, an output end of the auxiliary circuit of the supercooling heat exchanger is connected to an output end of the first regulating valve, the control apparatus comprising:

the acquisition module is used for acquiring indoor refrigerant leakage signals;

the control module is used for sequentially controlling the fourth regulating valve, the third regulating valve and the second regulating valve to be closed; controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining for a first set time; and controlling the first regulating valve to be closed.

6. The control device of claim 5, wherein the control module is further configured to:

and in the oil return or defrosting process of the air conditioner, controlling the fourth regulating valve to be opened to a preset maximum opening degree.

7. The control device of claim 5, wherein the control module is further configured to:

and if the air conditioner does not return oil or defrost within the second set time, controlling the air conditioner to stop.

8. The control device of claim 5, wherein the air conditioner further comprises a fifth regulator valve, an input of the fifth regulator valve being connected to an input of the second regulator valve, an output of the fifth regulator valve being connected to an output of the first regulator valve, the control module further configured to:

if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve to be opened and maintaining the third set time;

and controlling the fifth regulating valve to be closed.

9. An air conditioner, comprising: the control device of an air conditioner according to any one of claims 5 to 8.

10. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of controlling an air conditioner according to any one of claims 1 to 4 when executing the program.

11. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 4.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, a control device of the air conditioner and the air conditioner with the control device.

Background

The air conditioner in the market at present comprises indoor set and off-premises station, and the indoor set is connected through the connecting pipe with the off-premises station. If the refrigerant leakage occurs outside the room, the capacity of the air conditioning system is generally reduced, the safety of personnel is not greatly affected, and after the refrigerant leakage reaches a certain degree, the system can be judged through self protection logic without special detection. If refrigerant leaks occur on the inside of a room, particularly in certain hotel rooms, the air-tightness is good and there may be no window, and once leaking, people may be suffocated. If a micro-ignition refrigerant is used, there is even a risk of explosion. The existing air conditioner indoor unit evaporator is arranged indoors, joints and welding points are multiple, and the risk of refrigerant leakage at the indoor side is high, so that the detection of indoor refrigerant leakage is of great significance.

For a multi-split system, in the prior art, after leakage of a refrigerant is detected by various means, the refrigerant is recovered to an outdoor unit, and a refrigerant channel between an indoor unit and the indoor unit is cut off to prevent the refrigerant from further leaking to the indoor side. However, the technical measures also bring a problem, a plurality of indoor units of the multi-split air-conditioning system are usually connected to the same outdoor unit (a common manufacturer supports the same refrigeration system to be connected with 128 indoor units), if a refrigerant leaks or is mistakenly reported in a certain room, the whole multi-split air-conditioning system needs to be shut down, and a serious complaint event can occur for a hotel. Refrigerant leakage inspection and maintenance also requires a long time, during which the operation of the entire air conditioning system area needs to be stopped, which is often unacceptable.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a control method for an air conditioner, which can enable an indoor unit that does not leak to continue to operate unaffected when refrigerant leaks on an indoor side.

A second object of the present invention is to provide a control device for an air conditioner.

A third object of the present invention is to provide an air conditioner.

A fourth object of the invention is to propose an electronic device.

A fifth object of the present invention is to propose a computer-readable storage medium.

In order to achieve the above object, a first aspect of the present invention provides a control method for an air conditioner, the air conditioner including an outdoor unit, an indoor unit, a first regulating valve disposed on a low pressure gas pipe, a second regulating valve disposed on a high pressure gas pipe, a third regulating valve disposed on a high pressure liquid pipe, and a supercooling heat exchanger, an input end of a main circuit of the supercooling heat exchanger being connected to the outdoor unit, an output end of a main circuit of the supercooling heat exchanger being connected to an input end of the third regulating valve, an output end of the third regulating valve being connected to the indoor unit, an input end of an auxiliary circuit of the supercooling heat exchanger being connected to an output end of the main circuit of the supercooling heat exchanger through a fourth regulating valve, an output end of the auxiliary circuit of the supercooling heat exchanger being connected to an output end of the first regulating valve, the control method including: acquiring an indoor refrigerant leakage signal; the fourth regulating valve, the third regulating valve and the second regulating valve are controlled to be closed in sequence; controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining for a first set time; and controlling the first regulating valve to be closed.

According to the control method of the air conditioner, the first regulating valve is arranged on the low-pressure air pipe of the air conditioner, the second regulating valve is arranged on the high-pressure air pipe, the third regulating valve and the supercooling heat exchanger are arranged on the high-pressure liquid pipe, the input end of the main circuit of the supercooling heat exchanger is connected with the outdoor unit, the output end of the main circuit of the supercooling heat exchanger is connected with the input end of the third regulating valve, the output end of the third regulating valve is connected with the indoor unit, the input end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the main circuit of the supercooling heat exchanger through the fourth regulating valve, the output end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the first regulating valve, so that an indoor refrigerant leakage signal is obtained in real time, if the indoor refrigerant leakage signal is obtained, the fourth regulating valve, the third regulating valve and the second regulating valve are sequentially controlled to be closed, and then controlling the first regulating valve to close. Therefore, when the indoor side refrigerant leaks, the method enables the indoor unit which does not leak to continue to operate unaffected.

In addition, the control method of the air conditioner according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the present invention, the method for controlling an air conditioner further includes: and in the oil return or defrosting process of the air conditioner, controlling the fourth regulating valve to be opened to a preset maximum opening degree.

According to an embodiment of the present invention, the method for controlling an air conditioner further includes: and if the air conditioner does not return oil or defrost within the second set time, controlling the air conditioner to stop.

According to an embodiment of the present invention, the air conditioner further includes a fifth regulating valve, an input end of the fifth regulating valve is connected to an input end of the second regulating valve, an output end of the fifth regulating valve is connected to an output end of the first regulating valve, and the control method further includes: if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve to be opened and maintaining the third set time; and controlling the fifth regulating valve to be closed.

In order to achieve the above object, a second aspect of the present invention provides a control device for an air conditioner, the air conditioner including an outdoor unit, an indoor unit, a first regulating valve disposed on a low pressure gas pipe, a second regulating valve disposed on a high pressure gas pipe, a third regulating valve disposed on a high pressure liquid pipe, and a supercooling heat exchanger, an input end of a main circuit of the supercooling heat exchanger being connected to the outdoor unit, an output end of the main circuit of the supercooling heat exchanger being connected to an input end of the third regulating valve, an output end of the third regulating valve being connected to the indoor unit, an input end of a sub circuit of the supercooling heat exchanger being connected to an output end of the main circuit of the supercooling heat exchanger through a fourth regulating valve, an output end of the sub circuit of the supercooling heat exchanger being connected to an output end of the first regulating valve, the control device comprising: the acquisition module is used for acquiring indoor refrigerant leakage signals; the control module is used for sequentially controlling the fourth regulating valve, the third regulating valve and the second regulating valve to be closed; controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining for a first set time; and controlling the first regulating valve to be closed.

According to the control device of the air conditioner, the first regulating valve is arranged on the low-pressure air pipe of the air conditioner, the second regulating valve is arranged on the high-pressure air pipe, the third regulating valve and the supercooling heat exchanger are arranged on the high-pressure liquid pipe, the input end of the main circuit of the supercooling heat exchanger is connected with the outdoor unit, the output end of the main circuit of the supercooling heat exchanger is connected with the input end of the third regulating valve, the output end of the third regulating valve is connected with the indoor unit, the input end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the main circuit of the supercooling heat exchanger through the fourth regulating valve, the output end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the first regulating valve, so that an indoor refrigerant leakage signal is obtained in real time through the obtaining module, the fourth regulating valve, the third regulating valve and the second regulating valve are sequentially controlled to be closed through the control module, and then controlling the first regulating valve to close. Therefore, when the refrigerant leaks from the indoor side, the indoor unit without leakage can still continue to operate unaffected.

In addition, the control device of the air conditioner according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the invention, the control module is further configured to: and in the oil return or defrosting process of the air conditioner, controlling the fourth regulating valve to be opened to a preset maximum opening degree.

According to an embodiment of the invention, the control module is further configured to: and if the air conditioner does not return oil or defrost within the second set time, controlling the air conditioner to stop.

According to an embodiment of the present invention, the air conditioner further comprises a fifth regulating valve, an input end of the fifth regulating valve is connected with an input end of the second regulating valve, an output end of the fifth regulating valve is connected with an output end of the first regulating valve, and the control module is further configured to: if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve to be opened and maintaining the third set time; and controlling the fifth regulating valve to be closed.

In order to achieve the above object, a third embodiment of the present invention provides an air conditioner, which includes the control device of the air conditioner.

According to the air conditioner provided by the embodiment of the invention, through the control device of the air conditioner, when refrigerant leakage occurs at the indoor side, the indoor unit which does not leak can still continue to operate unaffected.

To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the air conditioner control method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the air conditioner is realized.

By executing the control method of the air conditioner, the electronic equipment of the embodiment of the invention enables the indoor unit which does not leak to continue to operate without being affected when the indoor side leaks the refrigerant.

To achieve the above object, a fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, the program, when executed by a processor, implementing the control method of the air conditioner as described above

By executing the control method of the air conditioner, the computer-readable storage medium of the embodiment of the invention enables the indoor unit which does not leak to continue to operate without being affected when the refrigerant leaks from the indoor side.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an air conditioner according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an air conditioner according to another embodiment of the present invention;

fig. 4 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;

fig. 5 is a block schematic diagram of a control apparatus of an air conditioner according to an embodiment of the present invention; and

fig. 6 is a block schematic diagram of an air conditioner according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A control method of an air conditioner, a control device of an air conditioner, and an air conditioner according to an embodiment of the present invention are described below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.

In an embodiment of the present invention, as shown in fig. 2, the air conditioner includes an outdoor unit (e.g., an outdoor unit 1), an indoor unit (e.g., an indoor unit 1 and an indoor unit 2), a first adjusting valve EBV-a disposed on a low-pressure gas pipe, a second adjusting valve EBV-B disposed on a high-pressure gas pipe, a third adjusting valve EBV-C disposed on a high-pressure gas pipe, and a supercooling heat exchanger, wherein an input end of a main circuit of the supercooling heat exchanger is connected to the outdoor unit, an output end of the main circuit of the supercooling heat exchanger is connected to an input end of the third adjusting valve EBV-C, an output end of the third adjusting valve EBV-C is connected to the indoor unit, an input end of an auxiliary circuit of the supercooling heat exchanger is connected to an output end of the main circuit of the supercooling heat exchanger through a fourth adjusting valve EEVD. The first regulating valve EBV-A, the second regulating valve EBV-B and the third regulating valve EBV-C can be electric adjustable stop valves (such as electric ball valves).

As shown in fig. 1, the method for controlling an air conditioner according to an embodiment of the present invention includes the following steps:

and S1, obtaining indoor refrigerant leakage signals.

For example, access points T1C1 and T2C2 of refrigerant leakage sensors are provided at both ends of a supercooling heat exchanger sub-circuit of an air conditioner, and whether or not indoor refrigerant leaks is detected in real time by the refrigerant leakage sensors provided at the access points T1C1 and T2C2, and if the indoor refrigerant leaks, an indoor refrigerant leakage signal is generated.

And S2, sequentially controlling the fourth regulating valve, the third regulating valve and the second regulating valve to be closed.

And S3, controlling the first regulating valve to be opened to a preset maximum opening degree and maintaining the first set time. The first setting time may be set according to actual conditions, and may be set to 30s, for example.

And S4, controlling the first regulating valve to close.

Specifically, in the system operation process, whether indoor refrigerant leaks or not is detected in real time through refrigerant leakage sensors arranged at access points T1C1 and T2C2, and an indoor refrigerant leakage signal is generated when the indoor refrigerant leaks. After an indoor refrigerant leakage signal is detected, a fourth adjusting valve EEVD of the sub-circuit of the supercooling heat exchanger, a third adjusting valve EBV-C on a high-pressure liquid pipe and a second adjusting valve EBV-B on a high-pressure gas pipe are closed in sequence immediately, then the first adjusting valve EBV-A is opened to a preset maximum opening degree, a first set time (such as 30s) is kept, so that an indoor unit with the refrigerant leakage is communicated with the system at a low pressure, the refrigerant and the refrigeration oil in the indoor unit and a connecting pipeline thereof can flow to the outdoor unit side as far as possible, and the leakage amount of the refrigerant and the refrigeration oil is reduced. And then, closing the first regulating valve EBV-A to completely isolate the indoor unit with the refrigerant leakage from other indoor units in the system.

For example, it is assumed that the inner unit 1 of the air conditioner is cooling, and the first adjustment valve EBV-a is open and the second adjustment valve EBV-B is closed. The refrigerant flows in the following directions when the indoor unit 1 is refrigerating: the refrigerant flowing out of the outdoor unit 1 enters a high-pressure liquid pipe firstly, then flows through the main path of the cold heat exchanger and is divided into two paths, and one path of the refrigerant flows through the auxiliary path of the super-cooling heat exchanger through a fourth adjusting valve EEVD; the other path enters the inner machine 1 through a third regulating valve EBV-C for refrigeration, then flows out of the inner machine 1 and passes through a first regulating valve EBV-A, then is converged with a refrigerant flowing out of an auxiliary path of the supercooling heat exchanger, flows into a low-pressure air pipe, and finally returns to the outer machine 1.

During the cooling process of the inner unit 1, if the refrigerant leakage signal is detected by the refrigerant leakage sensors connected to the two ends of the access points T1C1 and T2C2, it indicates that the inner unit 1 has refrigerant leakage. At this time, the fourth regulating valve EEVD of the sub-circuit of the supercooling heat exchanger and the third regulating valve EBV-C of the high-pressure liquid pipe are closed in sequence immediately, the closed state of the second regulating valve EBV-B of the high-pressure gas pipe and the open state of the first regulating valve EBV-a are maintained, and the state is continued for a first set time (for example, 30s) so that the inner unit 1 leaking the refrigerant is communicated with the low-pressure gas pipe, the refrigerant and the refrigeration oil in the inner unit 1 and the connecting pipeline thereof are flowed to the outer unit 1 as much as possible, and the leakage amount of the refrigerant and the refrigeration oil is reduced. The first regulator EBV-a is then closed to completely isolate the inner unit 1 from the other indoor units in the system (e.g., the inner unit 2). This does not affect the operation of other internal machines, such as the internal machine 2 can continue cooling operation or heating operation.

Assuming that the inner unit 2 of the air conditioner is heating, the first adjustment valve EBV-a is closed and the second adjustment valve EBV-B is open. The refrigerant flowing out of the outdoor unit 1 firstly enters a high-pressure air pipe, enters the indoor unit 2 through a second adjusting valve EBV-B to be heated, then flows out of the indoor unit 2, is divided into two paths through a third adjusting valve EBV-C, and one path directly returns to the outdoor unit 1 through a main path of the supercooling heat exchanger; and the other path enters an auxiliary path of the supercooling heat exchanger through a fourth regulating valve EEVD and returns to the outdoor unit 1.

During the heating process of the inner unit 2, if the refrigerant leakage signal is detected by the refrigerant leakage sensors connected to the two ends of the access points T1C1 and T2C2, it indicates that the inner unit 2 has refrigerant leakage. At the moment, a fourth regulating valve EEVD of the sub-circuit of the supercooling heat exchanger, a third regulating valve EBV-C on the high-pressure liquid pipe and a second regulating valve EBV-B on the high-pressure gas pipe are closed immediately in sequence, then the first regulating valve EBV-A is opened, and a first set time (such as 30s) is kept, so that the inner machine 2 with leaked refrigerant is communicated with the low-pressure gas pipe, the refrigerant and the refrigeration oil in the inner machine 2 and the connecting pipeline thereof are flowed into the outer machine 1 as much as possible, and the leakage amount of the refrigerant and the refrigeration oil is reduced. The first regulator EBV-a is then closed to completely isolate the inner unit 2 from the other indoor units in the system (e.g., inner unit 1). This does not affect the operation of the other internal machines, i.e. the internal machine 1 can continue to operate, such as cooling operation or heating operation.

According to the control method of the air conditioner, when refrigerant leakage is detected, the refrigerant pipelines of the leaked indoor unit and the system are cut off, meanwhile, through reasonable control, oil storage and refrigerant storage of the connecting pipe can be avoided, and when the refrigerant leakage occurs to the indoor unit, the indoor unit which does not leak can still continue to operate unaffected.

It should be noted that, by the above method, when the indoor unit leaks refrigerant, the indoor unit that does not leak can still continue to operate without being affected, but some problems may also occur, for example, a high pressure liquid pipe and a high pressure gas pipe connected to the outdoor unit both form a dead end. For example, the high-pressure liquid refrigerant flows in the high-pressure liquid pipe, the refrigerant quantity is large, the flow rate is low, the oil content in the refrigerant is high, and after the third regulating valve EBV-C on the high-pressure liquid pipe is cut off, the refrigerant oil is stored in the section of blind pipe and cannot flow out, so that the problem of oil shortage and refrigerant shortage of the system is caused. For this reason, in one embodiment of the present invention, the fourth regulating valve is controlled to be opened to a preset maximum opening degree during the oil return or defrosting process of the air conditioner. That is, the fourth regulating valve EEVD needs to be opened every time the system returns oil, so that the refrigerant and the refrigerant oil stored in the high pressure liquid pipe can be returned to the outdoor unit.

In addition, because the high-pressure gas refrigerant is connected to the end of the high-pressure gas pipe, when the system operates in a heating mode, the high-pressure gas refrigerant is gradually condensed in the high-pressure gas pipe slowly, and meanwhile, the refrigeration oil is also stored slowly. Therefore, in this state, if the outdoor unit cannot switch the high-pressure air pipe to the low-pressure state during defrosting or oil return, the whole system operates for a long time in the heating mode, and the problem of oil and refrigerant shortage occurs. Therefore, the system can only be allowed to operate for a certain time (such as the second set time), and then the air conditioner must be stopped, that is, if the air conditioner does not return oil or defrost within the second set time, the air conditioner is controlled to be stopped.

To solve this problem, as shown in fig. 3, a capillary tube (fifth control valve SV1) with a solenoid valve is connected between the high pressure gas pipe and the low pressure gas pipe of the air conditioner, wherein an input end of the fifth control valve SV1 is connected to an input end of the second control valve EBV-B, and an output end of the fifth control valve SV1 is connected to an output end of the first control valve EBV-a. In an embodiment of the present invention, the method for controlling an air conditioner further includes: if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve to be opened and maintaining the third set time; and controlling the fifth regulating valve to be closed.

Specifically, after the refrigerant pipeline of the indoor unit is cut off due to the fact that refrigerant leakage occurs on the side of the indoor unit is detected, the fifth adjusting valve SV1 can be controlled to be opened at regular intervals and closed after the third set time is maintained, so that oil storage at the blind end of the high-pressure air pipe is avoided, and the rest of systems can continue to operate completely without being influenced.

In order to make the present invention more clear to those skilled in the art, as shown in fig. 4, a control method of an air conditioner according to an embodiment of the present invention includes:

and S101, detecting a refrigerant leakage signal.

S102, the fourth regulating valve EEVD is closed.

S103, the third regulating valve EBV-C is closed.

And S104, closing the second regulating valve EBV-B.

S105, fully opening the first regulating valve EBV-A.

And S106, starting a refrigerant leakage timing.

S107, whether the counted time is greater than t1 is judged. If yes, go to step S108; if not, return to step S105.

S108, the first regulating valve EBV-A is closed.

And S109, judging whether the system performs oil return/defrosting. If yes, go to step S110; if not, step S111 is performed.

And S110, controlling the fourth regulating valve EEVD to be fully opened in oil return/defrosting.

S111, judging whether the timing time is more than t 2. If yes, go to step S112; if not, return to step S108.

And S112, the fifth regulating valve SV1 is controlled to be closed after being opened for time t 3.

In step S113, the timer clear is restarted, and the process returns to step S108.

In summary, according to the control method of the air conditioner of the embodiment of the present invention, by providing the first regulating valve on the low pressure gas pipe of the air conditioner, providing the second regulating valve on the high pressure gas pipe, and providing the third regulating valve and the supercooling heat exchanger on the high pressure liquid pipe, the input end of the main circuit of the supercooling heat exchanger is connected to the outdoor unit, the output end of the main circuit of the supercooling heat exchanger is connected to the input end of the third regulating valve, the output end of the third regulating valve is connected to the indoor unit, the input end of the auxiliary circuit of the supercooling heat exchanger is connected to the output end of the main circuit of the supercooling heat exchanger through the fourth regulating valve, the output end of the auxiliary circuit of the supercooling heat exchanger is connected to the output end of the first regulating valve, so as to obtain the indoor refrigerant leakage signal in real time, if the indoor refrigerant leakage signal is obtained, the fourth regulating valve, the third regulating valve and the second regulating valve are sequentially controlled to, and then controlling the first regulating valve to close. Therefore, when the indoor side refrigerant leaks, the method enables the indoor unit which does not leak to continue to operate unaffected.

Fig. 5 is a block diagram schematically illustrating a control apparatus of an air conditioner according to an embodiment of the present invention.

In an embodiment of the present invention, as shown in fig. 2, the air conditioner includes an outdoor unit (e.g., an outdoor unit 1), an indoor unit (e.g., an indoor unit 1 and an indoor unit 2), a first adjusting valve EBV-a disposed on a low-pressure gas pipe, a second adjusting valve EBV-B disposed on a high-pressure gas pipe, a third adjusting valve EBV-C disposed on a high-pressure gas pipe, and a supercooling heat exchanger, wherein an input end of a main circuit of the supercooling heat exchanger is connected to the outdoor unit, an output end of the main circuit of the supercooling heat exchanger is connected to an input end of the third adjusting valve EBV-C, an output end of the third adjusting valve EBV-C is connected to the indoor unit, an input end of an auxiliary circuit of the supercooling heat exchanger is connected to an output end of the main circuit of the supercooling heat exchanger through a fourth adjusting valve EEVD. The first regulating valve EBV-A, the second regulating valve EBV-B and the third regulating valve EBV-C can be electric adjustable stop valves (such as electric ball valves).

As shown in fig. 5, the control device of an air conditioner according to an embodiment of the present invention includes: an acquisition module 10 and a control module 20.

The acquisition module 10 is used for acquiring indoor refrigerant leakage signals, and the control module 20 is used for sequentially controlling the fourth regulating valve EEVD, the third regulating valve EBV-C and the second regulating valve EBV-B to be closed; controlling the first regulating valve EBV-A to be opened to a preset maximum opening degree and maintaining the first set time; the first regulator valve EBV-A is controlled to close.

According to one embodiment of the invention, the control module 20 is further configured to: and in the oil return or defrosting process of the air conditioner, controlling the fourth regulating valve EEVD to be opened to a preset maximum opening degree.

According to one embodiment of the invention, the control module 20 is further configured to: and if the air conditioner does not return oil or defrost within the second set time, controlling the air conditioner to stop.

According to one embodiment of the present invention, as shown in fig. 3, the air conditioner further includes a fifth regulator valve SV1, an input terminal of the fifth regulator valve SV1 is connected to an input terminal of the second regulator valve EBV-B, an output terminal of the fifth regulator valve SV1 is connected to an output terminal of the first regulator valve EBV-a, and the control module 20 is further configured to: if the air conditioner does not return oil or defrost within the second set time, controlling the fifth regulating valve SV1 to be opened and maintaining the third set time; the fifth regulator valve SV1 is controlled to close.

It should be noted that, for details not disclosed in the control device of the air conditioner in the embodiment of the present invention, please refer to details disclosed in the control method of the air conditioner in the embodiment of the present invention, and detailed description thereof is omitted here.

According to the control device of the air conditioner, the first regulating valve is arranged on the low-pressure air pipe of the air conditioner, the second regulating valve is arranged on the high-pressure air pipe, the third regulating valve and the supercooling heat exchanger are arranged on the high-pressure liquid pipe, the input end of the main circuit of the supercooling heat exchanger is connected with the outdoor unit, the output end of the main circuit of the supercooling heat exchanger is connected with the input end of the third regulating valve, the output end of the third regulating valve is connected with the indoor unit, the input end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the main circuit of the supercooling heat exchanger through the fourth regulating valve, the output end of the auxiliary circuit of the supercooling heat exchanger is connected with the output end of the first regulating valve, so that an indoor refrigerant leakage signal is obtained in real time through the obtaining module, the fourth regulating valve, the third regulating valve and the second regulating valve are sequentially controlled to be closed through the control module, and then controlling the first regulating valve to close. Therefore, when the refrigerant leaks from the indoor side, the indoor unit without leakage can still continue to operate unaffected.

Fig. 6 is a block schematic diagram of an air conditioner according to an embodiment of the present invention. As shown in fig. 6, an air conditioner 1000 according to an embodiment of the present invention includes the control device 100 of the air conditioner described above.

According to the air conditioner provided by the embodiment of the invention, through the control device of the air conditioner, when the refrigerant leaks, the indoor unit which does not leak can still continue to operate unaffected.

In addition, the present invention also provides an electronic device, comprising: the air conditioner control method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the air conditioner is realized.

By executing the control method of the air conditioner, the electronic equipment of the embodiment of the invention enables the indoor unit which does not leak to continue to operate without being affected when the indoor side leaks the refrigerant.

In addition, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the air conditioner described above

By executing the control method of the air conditioner, the computer-readable storage medium of the embodiment of the invention enables the indoor unit which does not leak to continue to operate without being affected when the refrigerant leaks from the indoor side.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.