WO2023097936A1

WO2023097936A1 - Method and device for controlling air conditioner, air conditioner, and storage medium

Info

Publication number: WO2023097936A1
Application number: PCT/CN2022/082435
Authority: WO
Inventors: 张心怡; 王飞; 许文明; 蒋骏; 李阳
Original assignee: 青岛海尔空调器有限总公司; 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2021-11-30
Filing date: 2022-03-23
Publication date: 2023-06-08
Also published as: CN114216230A; CN114216230B

Abstract

The present application relates to the technical field of smart home appliances, and discloses a method for controlling an air conditioner. The method comprises: when an air conditioner is started, controlling an electronic expansion valve to be opened to the maximum opening degree; and when the electronic expansion valve is opened to the maximum opening degree, controlling the air conditioner to operate for a preset duration, so as to adjust an inlet-outlet pressure difference of a check valve. The electronic expansion valve is controlled to be opened to the maximum opening degree, so as to increase the circulation speed of a refrigerant, and when the electronic expansion valve is opened to the maximum opening degree, the air conditioner is controlled to operate for a preset duration, such that the inlet-outlet pressure difference of the check valve meets opening and closing requirements of the check valve, thereby reducing the probability of opening and closing failures of the check valve. The present application further discloses a device for controlling an air conditioner, an air conditioner, and a storage medium.

Description

Method and device for controlling air conditioner, air conditioner, storage medium

This application is based on a Chinese patent application with application number 202111444492.X and a filing date of November 30, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling an air conditioner, an air conditioner, and a storage medium.

Background technique

The variable split design of the air conditioner means that when the air conditioner operates in different modes, the refrigerant forms different flow paths in the heat exchanger. Specifically, when the air conditioner is heating, the refrigerant in the heat exchanger can flow through more branches to reduce the system pressure drop; when the air conditioner is cooling, the refrigerant in the heat exchanger can flow through fewer branches to speed up the refrigerant cycle.

The prior art discloses a heat exchanger, which has a plurality of heat exchange pipelines and a bypass pipeline communicated with the heat exchange pipelines. A one-way valve is installed on the bypass pipeline. When the air conditioner is in the heating mode, the one-way valve is turned on so that multiple heat exchange pipelines form a parallel path. Passage, so as to realize the variable split of the heat exchanger.

In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the above-mentioned related technologies: the arrangement of the check valve includes horizontal arrangement and vertical arrangement. Noise, wear and noise can be avoided by adopting the vertical setting. The vertical setting requires a certain pressure difference between the upper end and the lower end of the check valve to balance the gravity of the valve core, so as to realize the normal on-off function of the check valve.

However, the pressure of the air conditioner with variable shunt function is unstable when it is turned on, and it is difficult to ensure the pressure difference between the inlet and outlet of the check valve, resulting in the on-off failure of the check valve, which in turn makes the air conditioner unable to realize the function of variable shunt.

Contents of the invention

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. The summary is not intended to be an extensive overview nor to identify key/important elements or to delineate the scope of these embodiments, but rather serves as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner, and a storage medium, so as to reduce on-off failure of the one-way valve caused by the vertical arrangement of the one-way valve and unstable pressure when the air conditioner is turned on The probability.

In some embodiments, the method for controlling an air conditioner includes that the air conditioner includes an outdoor heat exchanger, an electronic expansion valve, and an indoor heat exchanger connected in series; wherein the indoor heat exchanger and/or The outdoor heat exchanger includes a bypass line with a vertical one-way valve, and the conduction direction of the one-way valve is limited to the indoor heat exchanger with it or the outdoor heat exchanger with it. When the heat exchanger is used as an evaporator, it is turned on when the indoor heat exchanger with it or the outdoor heat exchanger with it is used as a condenser; the method includes:

When the air conditioner is turned on, controlling the electronic expansion valve to open to a maximum opening;

When the electronic expansion valve is opened to the maximum opening degree, the air conditioner is controlled to operate for a set period of time, so as to adjust the pressure difference between the inlet and outlet of the one-way valve.

Optionally, the set duration is determined according to the operating mode of the air conditioner and the outdoor temperature.

Optionally, determining the set duration according to the operating mode of the air conditioner and the outdoor temperature includes:

When the air conditioner operates in cooling mode and the outdoor temperature is greater than a first preset temperature, the set duration is a first duration t1;

When the air conditioner operates in cooling mode and the outdoor temperature is lower than the first preset temperature, the set duration is a second duration t2;

When the air conditioner operates in heating mode and the outdoor temperature is greater than a second preset temperature, the set duration is a third duration t3;

When the air conditioner operates in heating mode and the outdoor temperature is lower than the second preset temperature, the set duration is determined according to the discharge temperature of the compressor;

Where t1<t3<t2.

Optionally, determining the set duration according to the discharge temperature of the compressor includes:

When the exhaust gas temperature is greater than the third preset temperature, the set duration is t3;

When the exhaust gas temperature is lower than the third preset temperature, the set duration is t2.

Optionally, the first preset temperature is greater than or equal to 16°C;

Optionally, the second preset temperature is less than or equal to 0°C.

Optionally, the third preset temperature is greater than or equal to 50°C.

Optionally, after controlling the air conditioner to run for a set period of time, it includes:

Controlling the opening of the electronic expansion valve to adjust to the opening value corresponding to the current operating mode of the air conditioner.

The device for controlling an air conditioner includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling an air conditioner described in any of the above embodiments when running the program instructions. method.

The air conditioner includes means for controlling the air conditioner.

The storage medium stores program instructions, and when the program instructions are run, the method for controlling the air conditioner described in any of the above embodiments is executed.

The method and device for controlling an air conditioner, the air conditioner, and the storage medium provided in the embodiments of the present disclosure can achieve the following technical effects:

In order to avoid spool wear and abnormal sound when the check valve is placed horizontally, the check valve is placed vertically. Since the internal refrigerant pressure of the air conditioner is unstable when the air conditioner is turned on, the pressure difference between the inlet and outlet of the check valve is difficult to balance the gravity of the valve core, which can easily lead to the failure of the check valve to be turned on and off. At this time, the electronic expansion valve is controlled to open to the maximum opening, and the circulation speed of the refrigerant is accelerated; and when the electronic expansion valve is opened to the maximum opening, the air conditioner is controlled to run for a set time, so that the pressure difference between the inlet and outlet of the check valve meets The on-off requirement of the one-way valve reduces the probability of on-off failure of the one-way valve, thereby ensuring that the air conditioner can realize the function of variable shunting.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the corresponding drawings, and these exemplifications and drawings do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings are not limited to scale and in which:

Fig. 1 is a schematic diagram of an outdoor heat exchanger provided by an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of the refrigerant flow path of the outdoor heat exchanger in the cooling mode of the air conditioner provided by an embodiment of the present disclosure;

3 is a schematic diagram of the refrigerant flow path of the outdoor heat exchanger in the heating mode of the air conditioner provided by an embodiment of the present disclosure;

Fig. 4 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

Fig. 5 is a schematic diagram of a method for determining the set duration of the air conditioner in the cooling mode provided by an embodiment of the present disclosure;

Fig. 6 is a schematic diagram of a method for determining the set duration of the air conditioner in the heating mode provided by an embodiment of the present disclosure;

Fig. 7 is a schematic diagram of a method for determining a set duration according to the exhaust gas temperature provided by an embodiment of the present disclosure;

Fig. 8 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

Fig. 9 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure.

Reference signs:

100: the first main road; 110: the second main road;

200: the first heat exchange passage; 210: the second heat exchange passage; 220: the third heat exchange passage; 230: the fourth heat exchange passage; 240: the fifth heat exchange passage; 250: the first bypass pipe; 251 : the first one-way valve; 260: the second bypass pipeline; 261: the second one-way valve;

300: the first shunt element; 310: the second shunt element; 320: the third shunt element; 330: the fourth shunt element;

400: processor; 401: memory; 402: communication interface; 403: bus.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances so as to facilitate the embodiments of the disclosed embodiments described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

Unless stated otherwise, the term "plurality" means two or more.

In the embodiments of the present disclosure, the character "/" indicates that the preceding and following objects are an "or" relationship. For example, A/B means: A or B.

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

The term "correspondence" may refer to an association relationship or a binding relationship, and the correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

In the embodiments of the present disclosure, smart home appliances refer to home appliances formed by introducing microprocessors, sensor technologies, and network communication technologies into home appliances. They have the characteristics of intelligent control, intelligent perception, and intelligent applications. Relying on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips, for example, smart home appliances can realize remote control and management of smart home appliances by users by connecting electronic devices.

The refrigerant circulation system of an air conditioner is generally composed of a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and a four-way valve. The four-way valve is used to change the flow direction of the refrigerant in the refrigerant circulation system. When the air conditioner is running in cooling mode, the refrigerant discharged from the compressor passes through the four-way valve to pass through the outdoor heat exchanger, electronic expansion valve and indoor heat exchanger in sequence, and finally returns to the compressor for recompression. When the air conditioner is running in heating mode, the refrigerant discharged from the compressor passes through the four-way valve to pass through the indoor heat exchanger, electronic expansion valve and outdoor heat exchanger in sequence, and finally returns to the compressor for recompression.

For an air conditioner with a variable split function, the circulation path of the internal refrigerant in the indoor heat exchanger and/or outdoor heat exchanger can be changed according to the operating mode of the air conditioner. As shown in FIG. 1 , an embodiment of the present disclosure provides an air conditioner, in which a refrigerant circulation path of an outdoor heat exchanger changes according to an operation mode of the air conditioner.

As shown in Figure 1, the outdoor heat exchanger is provided with a first heat exchange passage 200, a second heat exchange passage 210, a third heat exchange passage 220, a fourth heat exchange passage 230 and a fifth heat exchange passage from top to bottom. 240. The first end of the first heat exchange passage 200 communicates with the first flow distribution element 300, and its second end communicates with the second flow distribution element 310; and, the first flow distribution element 300 communicates with the first main pipeline 100; the second heat exchange passage The first end of 210 communicates with the first flow distribution element 300, the second end communicates with the second flow distribution element 310; the first end of the third heat exchange path 220 communicates with the third flow distribution element 320, and its second end communicates with the second The flow splitting element 310 ; the first end of the fourth heat exchange passage 230 communicates with the third flow splitting element 320 , and the second end communicates with the second flow splitting element 310 . The first end of the fifth heat exchange channel 240 communicates with the third flow distribution element 320, and the second end communicates with the fourth flow distribution element 330; and, the fourth flow distribution element 330 communicates with the second main pipeline 110; the first bypass pipe The first end of the road 250 communicates with the first flow splitting element 300, and its second end communicates with the third flow splitting element 320; the first end of the second bypass line 260 communicates with the second flow splitting element 310, and its second end communicates with In the fourth splitter element 330; the first bypass line 250 is provided with a vertical first one-way valve 251, and the lower end of the first one-way valve 251 is the inlet end, and the upper end is the outlet end; the second bypass line 260 is provided with a vertical second one-way valve 261, and the lower end of the second one-way valve 261 is the inlet end, and the upper end is the outlet end.

When the air conditioner operates in cooling mode, the outdoor heat exchanger acts as a condenser. As shown in FIG. 2 , the refrigerant enters the first distribution element 300 from the first main pipeline 100 . The first one-way valve 251 remains in a closed state, and the refrigerant in the first flow distribution element 300 can only enter the second flow distribution element 310 through the first heat exchange passage 200 and the second heat exchange passage 210 respectively. The second one-way valve 261 remains in a closed state, and the refrigerant in the second flow distribution element 310 can only enter the third flow distribution element 320 through the third heat exchange passage 220 and the fourth heat exchange passage 230 . Finally, the refrigerant in the third flow distribution element 320 enters the fourth flow distribution element 330 through the fifth heat exchange passage 240 and flows out from the second main pipe 110 .

When the air conditioner operates in the heating mode, the outdoor heat exchanger acts as an evaporator. As shown in FIG. 3 , the refrigerant enters the fourth flow distribution element 330 from the second main pipeline 110 . When the second one-way valve 261 is kept in the conduction state, the refrigerant in the fourth diverter element 330 is divided into two paths, one path enters the third flow element 320 through the fifth heat exchange path 240 , and the other path enters through the second bypass line 260 The second shunt element 310 . Then the refrigerant in the second flow distribution element 310 is further divided into four paths, one path enters the third flow distribution element 320 through the fourth heat exchange passage 230, one path enters the third flow distribution element 320 through the third heat exchange path 220, and one path passes through the first heat exchange path. The passage 200 enters the first flow distribution element 300 , and all the way enters the first flow distribution element 300 through the second heat exchange passage 210 . The first one-way valve 251 remains in a conducting state, and the refrigerant in the third flow distribution element 320 enters the first flow distribution element 300 through the first bypass line 250 . Finally, the refrigerant in the first distribution element 300 flows out through the first main pipeline 100 .

In this way, by reasonably arranging the communication relationship between multiple heat exchange passages and bypass pipelines, and setting a one-way valve on the bypass pipeline, the one-way valve is closed when the outdoor heat exchanger is used as a condenser, and the outdoor heat exchanger is used as a condenser. When the evaporator is turned on, the variable flow splitting function of the air conditioner is realized. Once the on-off failure of the one-way valve occurs, the air conditioner cannot realize variable shunting. Here, if the indoor heat exchanger has the above-mentioned heat exchange passage and a bypass line with a one-way valve, the one-way valve leads to conduction when the indoor heat exchanger is used as an evaporator when the air conditioner is operating in cooling mode, and the air conditioner operates In heating mode, the indoor heat exchanger is turned off when it acts as a condenser.

In some embodiments, the difference between the outlet pressure at the upper end and the inlet pressure at the lower end is the differential pressure between the inlet and outlet. The preset pressure difference between the upper outlet and the lower inlet of the check valve is 0.01MPa, and the inlet and outlet pressure difference directly affects the on-off of the check valve. If the pressure difference between the inlet and outlet is greater than the preset pressure difference, the one-way valve will be closed, and if the pressure difference between the inlet and outlet is smaller than the preset pressure difference, the one-way valve will be turned on.

In some embodiments, as shown in FIG. 4 , an embodiment of the present disclosure provides a method for controlling an air conditioner, including:

S10: When the air conditioner is turned on, the processor 400 controls the electronic expansion valve to open to the maximum opening;

S20: When the electronic expansion valve is opened to the maximum opening, the processor 400 controls the air conditioner to run for a set duration, so as to adjust the pressure difference between the inlet and outlet of the one-way valve.

When the air conditioner is turned on, the pressure inside the air conditioner is unstable. If the air conditioner starts to operate in the cooling mode at this time, the first one-way valve 251 and the second one-way valve 261 need to be closed, that is, the pressure difference between the inlet and outlet must be greater than the preset pressure difference; if the air conditioner is started to operate in the heating mode at this time, Then the first one-way valve 251 and the second one-way valve 261 need to be connected, that is, the pressure difference between the inlet and outlet must be smaller than the preset pressure difference. Due to the unstable pressure of the air conditioner, it is difficult to meet the pressure difference between the inlet and outlet of the check valve corresponding to different modes. At this time, the electronic expansion valve is opened to the maximum opening, which accelerates the circulation speed of the refrigerant; and when the electronic expansion valve is opened to the maximum opening, the air conditioner is controlled to run for a set time, so that the pressure difference between the inlet and outlet of the check valve It meets the on-off requirements of the one-way valve and reduces the probability of on-off failure of the one-way valve.

Optionally, the processor 400 determines the set duration according to the operating mode of the air conditioner and the outdoor temperature. The operating mode of the air conditioner is different, and the on-off requirements of the one-way valve are also different; the outdoor temperature affects the frequency of the compressor, and the frequency of the compressor affects the flow rate of the refrigerant, which in turn affects the pressure difference between the inlet and outlet of the one-way valve. Therefore, the processor 400 determines the set duration according to the operating mode and the outdoor temperature. Here, the air conditioner is provided with a first sensor for monitoring the outdoor temperature, and the first sensor is electrically connected to the processor 400 and sends an outdoor temperature signal to the processor 400 in real time.

Optionally, as shown in FIG. 5, the processor 400 determines the set duration according to the operating mode of the air conditioner and the outdoor temperature, including:

S21: When the air conditioner is running in cooling mode, the processor 400 determines whether the outdoor temperature is greater than a first preset temperature;

S22: If the outdoor temperature is greater than the first preset temperature, the processor 400 determines the set duration to be the first duration t1; if the outdoor temperature is lower than the first preset temperature, the processor 400 determines the set duration to be the second duration t2.

When the air conditioner is turned on and runs in cooling mode, the refrigerant enters the outdoor heat exchanger from the first main pipe 100 . The outlet pressure on the upper side of the one-way valve is relatively small. If the pressure difference between the inlet and outlet is less than the preset pressure difference, the one-way valve that should be cut off will be turned on. At this time, if the outdoor temperature is relatively high and greater than the first preset temperature, the frequency of the compressor is relatively high, and the circulation speed of the refrigerant is relatively fast. When the electronic expansion valve is fully open, control the air conditioner to run for the first time period t1 so that the pressure difference between the inlet and outlet is greater than the preset pressure difference, so that the pressure difference between the inlet and outlet of the check valve meets the cut-off requirement in cooling mode.

Optionally, the value range of the first preset temperature is 16°C to 22°C.

Optionally, the value range of t1 is 40s to 70s. For example, t1 may take any value among 40s, 45s, 50s, 55s, 60s, 65s, and 70s. Here t1 is preferably 60s.

When the air conditioner is powered on in cooling mode and the outdoor temperature is lower than the first preset temperature, the air conditioner is controlled to run for a second duration t2 with the electronic expansion valve fully open so that the pressure difference between the inlet and outlet is greater than the preset pressure difference. At this time, the frequency of the compressor is low, and the circulation speed of the refrigerant is relatively slow, so the value of t2 must be greater than t1.

Optionally, the value range of t2 is 190s to 220s. For example, t2 may take any value among 190s, 195s, 200s, 205s, 210s, 215s, and 220s. Here t2 is preferably 210s.

Optionally, as shown in FIG. 6, the processor 400 determines the set duration according to the operating mode of the air conditioner and the outdoor temperature, and further includes:

S31: When the air conditioner is in the heating mode, the processor 400 determines whether the outdoor temperature is greater than the second preset temperature;

S32: If the outdoor temperature is greater than the second preset temperature, the processor 400 determines the set duration to be the third duration t3; if the outdoor temperature is lower than the second preset temperature, the processor 400 determines the set duration according to the discharge temperature of the compressor.

When the air conditioner is turned on and operates in the heating mode, the refrigerant enters the outdoor heat exchanger from the second main pipeline 110 . The inlet pressure on the lower side of the one-way valve is relatively small. If the pressure difference between the inlet and outlet is greater than the preset pressure difference, the one-way valve that should be connected will be blocked. At this time, if the outdoor temperature is relatively high and greater than the second preset temperature, the air conditioner is controlled to run for a third duration t3 when the electronic expansion valve is fully opened so that the pressure difference between the inlet and outlet is greater than the preset pressure difference. At this time, the frequency of the compressor is high, and the refrigerant circulation speed is fast, so the value of t3 must be smaller than t2. At the same time, considering that when the air conditioner is turned on for heating, the lubricating oil of the compressor needs to return after being taken out by the refrigerant for a longer time than the time for cooling, so the value of t3 needs to be greater than t1. Therefore, the pressure difference between the inlet and outlet of the one-way valve meets the conduction requirement in the heating mode.

Optionally, the value range of the second preset temperature is -10°C to 0°C.

Optionally, the value range of t3 is 110s to 130s. For example, t3 may take any value among 110s, 115s, 120s, 125s, and 130s. Here t3 is preferably 120s.

Optionally, as shown in FIG. 7, in step S32, if the outdoor temperature is lower than the second preset temperature, the processor 400 determines the set duration according to the discharge temperature of the compressor, including:

S321: The processor 400 determines whether the exhaust gas temperature is greater than a third preset temperature;

S322: If the exhaust gas temperature is greater than the third preset temperature, the processor 400 determines that the set duration is t3; if the exhaust gas temperature is lower than the third preset temperature, the processor 400 determines that the set duration is t2.

When the air conditioner is powered on in the heating mode and the outdoor temperature is lower than the second preset temperature, the processor 400 needs to further determine the set duration according to the discharge temperature of the compressor. Here, the air conditioner is provided with a second sensor for monitoring the exhaust temperature, and the second sensor is electrically connected to the processor 400 and sends an exhaust temperature signal to the processor 400 in real time.

The determination of the setting time is particularly important. Although the electronic expansion valve can be opened to the maximum to increase the system pressure in a short time, if the maximum opening time is maintained, the setting time is unreasonable, which will not only damage the one-way valve but also seriously affect the performance of the air conditioner. cooling or heating effect. When the outdoor temperature is lower than the second preset temperature, the frequency of the compressor is relatively low. And at this time, the viscosity of the lubricating oil of the compressor is relatively high, and the return time required by the lubricating oil is longer than that when the outdoor temperature is greater than the second preset temperature. At this time, if the exhaust temperature is low, that is, the exhaust temperature is lower than the third preset temperature, the processor 400 needs to control the air conditioner to run for a second time t2 to make the pressure difference between the inlet and outlet greater than the preset pressure difference. If the exhaust gas temperature is higher, that is, when the exhaust gas temperature is greater than the third preset temperature, the viscosity of the lubricating oil is reduced, so the required return time is shorter than when the exhaust gas temperature is lower than the third preset temperature. At this time, the processor 400 controls the air conditioner to run for a third time period t3 so that the pressure difference between the inlet and outlet is greater than the preset pressure difference. According to the working conditions of the air conditioner, the outdoor temperature and the exhaust temperature, the setting time is reasonably determined, t1<t3<t2, so that the pressure difference between the inlet and outlet of the check valve can quickly meet the on-off demand of the check valve under different circumstances , to ensure the variable split function of the air conditioner.

In some embodiments, the pipeline connected to the outlet at the upper end of the one-way valve and the pipeline connected to the inlet at the lower end of the one-way valve are respectively provided with a small refrigerant pump, referred to as the first refrigerant pump and the second refrigerant pump respectively. The two refrigerant pumps are electrically connected to the processor 400, and the processor 400 controls the start and stop of the two refrigerant pumps according to the operating mode of the air conditioner and the pressure difference between the inlet and outlet of the one-way valve.

The air conditioner starts to run in cooling mode, the one-way valve has a cut-off demand and the outlet pressure on the upper side of the one-way valve is relatively small. At this time, the processor 400 controls the first refrigerant pump to start, and the first refrigerant pump increases the pressure of the upper outlet of the one-way valve, shortening the set time t1 or t2 for the air conditioner to operate when the outdoor temperature is greater than or lower than the first preset temperature. . When the inlet and outlet pressure difference is greater than the preset pressure difference, that is, the cut-off requirement is met, the processor 400 controls the first refrigerant pump to stop.

When the air conditioner is turned on and running in heating mode, the one-way valve has a conduction requirement and the outlet pressure on the lower side of the one-way valve is relatively small. At this time, the processor 400 controls the start of the second refrigerant pump, and the second refrigerant pump increases the pressure of the outlet on the lower side of the one-way valve, shortening the set time t3 or t2 for the air conditioner to operate when the outdoor temperature is greater than or lower than the second preset temperature. . When the pressure difference between the inlet and outlet is less than the preset pressure difference, that is, the conduction requirement is met, the processor 400 controls the first refrigerant pump to stop.

In some embodiments, as shown in FIG. 8 , an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

S20: When the electronic expansion valve is opened to the maximum opening, the processor 400 controls the running time of the air conditioner to adjust the pressure difference between the inlet and outlet of the check valve;

S30: The processor 400 controls the opening of the electronic expansion valve to be adjusted to the opening value corresponding to the current operating mode of the air conditioner.

When the electronic expansion valve is opened to the maximum opening, after the processor 400 controls the air conditioner to run for a set period of time, the pressure difference between the inlet and outlet of the check valve meets the on-off demand corresponding to the current air conditioner operating mode. After the air conditioner has been running for a set period of time, its pressure has tended to a stable state. If the opening of the expansion valve is still opened to the maximum, it will affect the cooling or heating effect of the air conditioner. Therefore, the processor 400 controls the opening of the electronic expansion valve to adjust to the maximum value of the air conditioner. The opening value corresponding to the current operating mode.

As shown in FIG. 11 , an embodiment of the present disclosure further provides an apparatus for controlling an air conditioner, including a processor 400 (processor) and a memory 401 (memory). Optionally, the device may also include a communication interface 402 (Communication Interface) and a bus 403. Wherein, the processor 400 , the communication interface 402 , and the memory 401 can communicate with each other through the bus 403 . Communication interface 402 may be used for information transfer. The processor 400 can call the logic instructions in the memory 401 to execute the method for controlling the air conditioner in the above embodiments.

In addition, the above logic instructions in the memory 401 may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as an independent product.

As a computer-readable storage medium, the memory 401 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 400 executes the program instructions/modules stored in the memory 401 to execute functional applications and data processing, ie to implement the method for controlling the air conditioner in the above embodiments.

The memory 401 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal device, and the like. In addition, the memory 401 may include a high-speed random access memory 401 and may also include a non-volatile memory 401 .

An embodiment of the present disclosure also provides an air conditioner, including the device for controlling the air conditioner described in any one of the above embodiments.

An embodiment of the present disclosure also provides a storage medium storing computer-executable instructions, and the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

The above-mentioned storage medium may be a transitory computer-readable storage medium, or a non-transitory computer-readable storage medium.

The technical solutions of the embodiments of the present disclosure can be embodied in the form of software products, which are stored in a storage medium and include one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to execute all or part of the steps of the methods of the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc. A medium that can store program code, or a transitory storage medium.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, procedural, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Also, the terms used in the present application are used to describe the embodiments only and are not used to limit the claims. As used in the examples and description of the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well unless the context clearly indicates otherwise . Similarly, the term "and/or" as used in this application is meant to include any and all possible combinations of one or more of the associated listed ones. Additionally, when used in this application, the term "comprise" and its variants "comprises" and/or comprising (comprising) etc. refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method or apparatus comprising said element. Herein, what each embodiment focuses on may be the difference from other embodiments, and the same and similar parts of the various embodiments may refer to each other. For the method, product, etc. disclosed in the embodiment, if it corresponds to the method part disclosed in the embodiment, then the relevant part can refer to the description of the method part.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software may depend on the specific application and design constraints of the technical solution. Said artisans may implement the described functions using different methods for each particular application, but such implementation should not be regarded as exceeding the scope of the disclosed embodiments. The skilled person can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined Or it can be integrated into another system, or some features can be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the disclosure. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than that disclosed in the description, and sometimes there is no specific agreement between different operations or steps. order. For example, two consecutive operations or steps may, in fact, be performed substantially concurrently, or they may sometimes be performed in the reverse order, depending upon the functionality involved. Each block in the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by dedicated hardware implemented in combination with computer instructions.

Claims

A method for controlling an air conditioner, characterized in that the air conditioner includes an outdoor heat exchanger, an electronic expansion valve and an indoor heat exchanger sequentially connected in series; wherein the indoor heat exchanger and/or the outdoor The heat exchanger includes a bypass line with a vertical one-way valve, the conduction direction of which is limited to the indoor heat exchanger with it or the outdoor heat exchanger with it as an evaporator is turned on, and is turned off when the indoor heat exchanger with it or the outdoor heat exchanger with it is used as a condenser; the method includes:

When the air conditioner is turned on, controlling the electronic expansion valve to open to a maximum opening;

When the electronic expansion valve is opened to the maximum opening degree, the air conditioner is controlled to operate for a set period of time, so as to adjust the pressure difference between the inlet and outlet of the one-way valve.
The method for controlling an air conditioner according to claim 1, wherein the set duration is determined according to the operating mode of the air conditioner and the outdoor temperature.
The method for controlling an air conditioner according to claim 2, wherein determining the set duration according to the operating mode of the air conditioner and the outdoor temperature comprises:

When the air conditioner operates in cooling mode and the outdoor temperature is greater than a first preset temperature, the set duration is a first duration t1;

When the air conditioner operates in cooling mode and the outdoor temperature is lower than the first preset temperature, the set duration is a second duration t2;

When the air conditioner operates in heating mode and the outdoor temperature is greater than a second preset temperature, the set duration is a third duration t3;

When the air conditioner operates in heating mode and the outdoor temperature is lower than the second preset temperature, the set duration is determined according to the discharge temperature of the compressor;

Where t1<t3<t2.
The method for controlling an air conditioner according to claim 3, wherein determining the set duration according to the discharge temperature of the compressor includes:

When the exhaust gas temperature is greater than the third preset temperature, the set duration is t3;

When the exhaust gas temperature is lower than the third preset temperature, the set duration is t2.
The method for controlling an air conditioner according to claim 3 or 4, characterized in that,

The first preset temperature is greater than or equal to 16°C.
The method for controlling an air conditioner according to claim 3 or 4, characterized in that,

The second preset temperature is less than or equal to 0°C.
The method for controlling an air conditioner according to claim 4, wherein,

The third preset temperature is greater than or equal to 50°C.
The method for controlling an air conditioner according to claim 1, characterized in that, after controlling the air conditioner to run for a set duration, comprising:

Controlling the opening of the electronic expansion valve to adjust to the opening value corresponding to the current operating mode of the air conditioner.
A device for controlling an air conditioner, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute any one of claims 1 to 8 when running the program instructions. The method for controlling an air conditioner is described.
An air conditioner, characterized by comprising the device for controlling the air conditioner as claimed in claim 9 .
A storage medium storing program instructions, wherein the program instructions execute the method for controlling an air conditioner according to any one of claims 1 to 8 when running.