WO2021057119A1

WO2021057119A1 - Air conditioner control method, system and air conditioner

Info

Publication number: WO2021057119A1
Application number: PCT/CN2020/097057
Authority: WO
Inventors: 高银堂; 鲁健
Original assignee: 广东美的制冷设备有限公司
Priority date: 2019-09-26
Filing date: 2020-06-19
Publication date: 2021-04-01
Also published as: CN110608519B; CN110608519A

Abstract

An air conditioner control method, system and air conditioner, relating to the technical field of refrigeration devices. An indoor unit of an air conditioner has a first air outlet and a second air outlet. The method comprises: when the air conditioner is in a single-opening outlet refrigeration mode, detecting whether the tube temperature of an indoor evaporator has dropped to a first pre-determined temperature, wherein the first pre-determined temperature is greater than the shutdown protection temperature; and if so, increasing the opening of a throttle device.

Description

Air conditioner control method, system and air conditioner

Cross-references to related applications

The present disclosure claims the priority of the Chinese Patent Publication with the publication number 201910916477.7, entitled "Control Method, System and Air Conditioner for Air Conditioning", filed on September 26, 2019, the entire content of which is incorporated into the present disclosure by reference.

Technical field

The present disclosure relates to the technical field of refrigeration equipment, and in particular to an air conditioner control method, system and air conditioner.

Background technique

For indoor units with upper and lower air outlets in the air conditioner, the evaporator tube temperature sensor of the indoor unit is generally placed at a lower position. When the lower air outlet of the indoor unit is closed, the air volume of the inner unit will decrease, and the indoor unit evaporator Half of the heat exchange effect will be worse. At this time, the temperature detected by the evaporator tube temperature sensor during cooling is relatively low, and the whole machine is likely to stop. In related technologies, the cooling capacity is reduced by reducing the operating frequency of the compressor, thereby Increase the temperature of the evaporator tube temperature sensor during refrigeration to achieve the purpose of delay or non-stop.

There are the following technical problems: reducing the operating frequency of the compressor, although it is delayed or does not stop, it affects the cooling effect, that is, the cooling effect becomes worse, which affects the user experience of the air conditioner.

Summary of the invention

The present disclosure aims to solve at least one of the related technical problems. For this reason, an object of the present disclosure is to provide a control method of an air conditioner. This method can effectively prevent the tube temperature of the indoor heat exchanger (ie, the evaporator) from falling to the shutdown protection temperature, and avoid the shutdown of the air conditioner, thereby improving the cooling effect in the single outlet cooling mode, thereby enhancing the user experience.

The second objective of the present disclosure is to provide a control system for an air conditioner.

The third purpose of the present disclosure is to propose an air conditioner.

The fourth objective of the present disclosure is to provide a computer-readable storage medium.

In order to achieve the above objective, the first aspect of the present disclosure discloses a control method of an air conditioner. The indoor unit of the air conditioner has a first air outlet and a second air outlet. The method includes: when the air conditioner is in a single outlet In the wind cooling mode, it is detected whether the temperature of the indoor evaporator tube drops to a first predetermined temperature, where the first predetermined temperature is greater than the shutdown protection temperature; if it is, the opening degree of the throttling device is increased.

According to the control method of the air conditioner of the present disclosure, when the air conditioner is operating in the single-port cooling mode, the opening degree of the throttling device (such as the electronic expansion valve of the outdoor unit) can be increased without reducing the operating frequency of the compressor. The way to increase the refrigerant flow can effectively prevent the tube temperature of the indoor heat exchanger (ie: evaporator) from falling to the shutdown protection temperature, and avoid the shutdown of the air conditioner, thereby improving the cooling effect in the single outlet cooling mode. In turn, the user experience is improved.

In some examples, the single-outlet cooling mode refers to a cooling mode in which one of the first air outlet and the second air outlet is closed and the other air outlet emits air. The indoor evaporator tube temperature Refers to the indoor evaporator tube temperature detected at the side of the one air outlet.

In some examples, the method further includes: when the air conditioner is in the single-outlet cooling mode, determining the compressor target exhaust temperature according to the cooling conditions; determining the opening of the throttling device according to the compressor target exhaust temperature Degree of increase.

In some examples, increasing the opening degree of the throttling device includes: increasing the opening degree of the throttling device according to an increase in the opening degree of the throttling device.

A second aspect of the present disclosure discloses a control system for an air conditioner. The indoor unit of the air conditioner has a first air outlet and a second air outlet. The system includes a detection module for when the air conditioner is in a single outlet. In the air cooling mode, detecting whether the indoor evaporator tube temperature drops to a first predetermined temperature, where the first predetermined temperature is greater than the shutdown protection temperature; the control module is configured to reduce the indoor evaporator tube temperature to the first predetermined temperature At a predetermined temperature, increase the opening of the throttling device.

According to the control system of the air conditioner of the present disclosure, when the air conditioner is operating in the single outlet cooling mode, the opening degree of the throttling device (such as the electronic expansion valve of the outdoor unit) can be increased without reducing the operating frequency of the compressor. The way to increase the refrigerant flow can effectively prevent the tube temperature of the indoor heat exchanger (ie: evaporator) from falling to the shutdown protection temperature, and avoid the shutdown of the air conditioner, thereby improving the cooling effect in the single outlet cooling mode. In turn, the user experience is improved.

In some examples, it further includes: a determining module, configured to determine the compressor target exhaust temperature according to the cooling operating conditions when the air conditioner is in the single-outlet cooling mode, and determine the compressor target exhaust temperature according to the compressor target exhaust temperature. The amount of increase in the opening of the throttle device.

In some examples, the control module is configured to increase the opening degree of the throttle device according to an increase in the opening degree of the throttle device.

The third aspect of the present disclosure discloses an air conditioner, including a memory, a processor, and an air conditioner control program stored in the memory and capable of running on the processor. When the processor executes the air conditioner control program, the The control method of the air conditioner described in the first aspect described above. When the air conditioner operates in the single-port cooling mode, it can increase the refrigerant flow by increasing the opening of the throttling device (such as the electronic expansion valve of the outdoor unit) without reducing the operating frequency of the compressor. It can effectively prevent the tube temperature of the indoor heat exchanger (ie, the evaporator) from falling to the shutdown protection temperature, and avoid the shutdown of the air conditioner, thereby improving the cooling effect in the single outlet cooling mode, thereby enhancing the user experience.

A fourth aspect of the present disclosure discloses a computer-readable storage medium on which a control program of an air conditioner is stored, and the control program of the air conditioner is executed by a processor to realize the control method of the air conditioner according to the above-mentioned first aspect.

The additional aspects and advantages of the present disclosure will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

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

Fig. 2 is a schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of a refrigeration system of an air conditioner according to an embodiment of the present disclosure;

Fig. 4 is a structural block diagram of a control system of an air conditioner according to an embodiment of the present disclosure.

detailed description

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present disclosure, but should not be construed as limiting the present disclosure.

The following describes the air conditioner control method, system, and air conditioner according to the embodiments of the present disclosure with reference to the accompanying drawings.

Before describing the control method, system, and air conditioner of the air conditioner according to the embodiments of the present disclosure, the indoor unit of the air conditioner and the refrigeration system of the air conditioner are first described.

As shown in Figure 2, the indoor unit 1 of the air conditioner (referred to as the internal unit) includes a first air outlet and a second air outlet. In a specific example, the first air outlet is, for example, the upper air outlet 2 at a relatively higher position. The air outlet is the lower air outlet 3 at the lower relative position. The upper air outlet 2 and the lower air outlet 3 can be opened for air supply at the same time, or one of the air outlets can be opened and the other air outlet closed. For example, the upper air outlet 2 is opened for air supply and the lower air outlet 3 is closed. The cooling mode in which one air outlet supplies air and the other air outlet is closed is called single outlet cooling mode, that is: single outlet cooling mode means that one of the first air outlet and the second air outlet is closed and the other air outlet is closed. The cooling mode of the air outlet, correspondingly, the indoor evaporator tube temperature refers to the indoor evaporator tube temperature detected at the side of an air outlet.

As shown in Figure 3, the refrigeration system includes compressor 4, exhaust sensor 5, four-way reversing valve 6, condenser 7 (ie: outdoor heat exchanger), electronic expansion valve 8, evaporator tube temperature sensor 9 and evaporator器10 (ie: indoor heat exchanger). Among them, the evaporator tube temperature sensor 9 is used to detect the indoor evaporator tube temperature, and the exhaust gas sensor 5 is used to detect the compressor exhaust temperature.

That is, the upper air outlet 2 is turned on and the lower air outlet 3 is closed, and the indoor evaporator tube temperature is the indoor evaporator tube temperature detected by the evaporator tube temperature sensor 9 on the side of the lower air outlet as shown in FIG. 3.

In a specific example, take the indoor unit 1 with the upper air outlet 2 and the lower air outlet 3 shown in FIG. 2 as an example. Normally, in the single outlet cooling mode, the upper air outlet 2 sends air and the lower air outlet 3 Closed, at this time, the air volume will be smaller than that of the two air outlets at the same time, and, as shown in Figure 3, the heat exchange effect of the lower half of the evaporator 10 will be worse. In this case, because The evaporator tube temperature sensor is usually set on the lower air outlet 3 side. Therefore, during cooling, the indoor evaporator tube temperature detected by the evaporator tube temperature sensor is relatively low, which makes it easy to shut down the whole machine, that is, it is easy to reach the shutdown temperature That is to say, the indoor evaporator tube temperature easily drops to a preset shutdown temperature, therefore, shutdown.

The air conditioner control method of the embodiment of the present disclosure can ensure the cooling effect while effectively avoiding shutdown. Specifically, as shown in FIG. 1, it is a flowchart of a control method of an air conditioner according to an embodiment of the present disclosure. As shown in Fig. 1, a control method of an air conditioner according to an embodiment of the present disclosure includes:

S101: When the air conditioner is in the single-outlet cooling mode, detect whether the temperature of the indoor evaporator tube drops to a first predetermined temperature, where the first predetermined temperature is greater than the shutdown protection temperature.

Among them, the shutdown protection temperature refers to when the indoor evaporator tube temperature drops to a specific temperature, the air conditioner shuts down, that is: the critical temperature when cooling is stopped, for example, the shutdown protection temperature is 2 degrees Celsius.

S102: If yes, increase the opening of the throttle device. For example, if the throttling device includes an electronic expansion valve 8, the opening degree of the electronic expansion valve 8 is increased.

According to the control method of the air conditioner according to the embodiment of the present disclosure, when the air conditioner is operating in the single outlet cooling mode, it is possible to increase the throttling device (such as the electronic expansion valve of the outdoor unit) without reducing the operating frequency of the compressor. The opening degree method increases the flow of refrigerant, thereby effectively preventing the tube temperature of the indoor heat exchanger (ie: evaporator) from falling to the shutdown protection temperature, avoiding the shutdown of the air conditioner, and thereby improving the cooling in the single outlet cooling mode The effect, in turn, enhances the user experience.

In a specific example, the method further includes: when the air conditioner is in a single outlet cooling mode, determining the target discharge temperature of the compressor according to the cooling conditions; and determining the increase in the opening degree of the throttle device according to the target discharge temperature of the compressor . Further, increasing the opening degree of the throttle device includes: increasing the opening degree of the throttle device according to the increase in the opening degree of the throttle device.

For example: the opening control formula of the electronic expansion valve during refrigeration is: compressor target discharge temperature = constant a* compressor operating frequency + constant b + outdoor ambient temperature, and the electronic expansion valve is controlled by setting the compressor target discharge temperature The opening.

Under the minimum cooling conditions (ie: indoor dry/wet bulb temperature: 21/15, outdoor dry/wet bulb temperature: 21/-), when the upper air outlet 2 and lower air outlet 3 are both open, this When the compressor operating frequency is 30Hz, the constant a is 0.7, the constant b is 2, the ambient temperature of the outdoor unit is 21°C, the target discharge temperature of the compressor is 44°C, and the opening degree of the electronic expansion valve found by the special experimental equipment is In step 100, the indoor unit evaporator tube temperature is 10°C. At this time, only the lower air outlet 3 is closed. When the indoor unit evaporator tube temperature drops to 5°C, start to adjust the opening of the electronic expansion valve, and other parameters remain unchanged , The target discharge temperature of the compressor is reduced to 35℃, the opening degree of the stabilized electronic expansion valve is 130 steps, and the indoor unit evaporator tube temperature is 8℃, so as to achieve the purpose of not reducing the compressor operating frequency or protecting the shutdown , To ensure the cooling effect.

Under standard refrigeration conditions (indoor dry/wet bulb temperature: 27/19, outdoor dry/wet bulb temperature: 35/24), when the upper air outlet 2 and lower air outlet 3 are both open, the compressor is compressed at this time The operating frequency of the unit is 70Hz, the constant a is 0.7, the constant b is 11, the ambient temperature of the outdoor unit is 35°C, the target exhaust temperature of the compressor is 95°C, and the opening degree of the electronic expansion valve found by the special experimental equipment is 190 steps , The indoor unit evaporator tube temperature is 11°C, at this time, only the lower air outlet 3 is closed. When the indoor unit evaporator tube temperature drops to 6°C, start to adjust the opening of the electronic expansion valve, and other parameters remain unchanged. The target discharge temperature of the compressor drops to 75℃, the opening degree of the electronic expansion valve after stabilization is 235 steps, and the indoor unit evaporator tube temperature is 8℃, so as to achieve the purpose of not reducing the compressor operating frequency or protecting the shutdown. The cooling effect is improved.

Under the cooling condition of 43℃ (indoor dry/wet bulb temperature: 27/19, outdoor dry/wet bulb temperature: 43/26), when the upper air outlet 2 and lower air outlet 3 are both open, at this time The operating frequency of the compressor is 60Hz, the constant a is 0.7, the constant b is 11, the ambient temperature of the outdoor unit is 43°C, the target exhaust temperature of the compressor is 96°C, and the opening degree of the electronic expansion valve found by the special experimental equipment is 170 Step, the indoor unit evaporator tube temperature is 12°C. At this time, only the lower air outlet 3 is closed. When the indoor unit evaporator tube temperature drops to 6°C, the opening of the electronic expansion valve will be adjusted. Other parameters remain unchanged. The target discharge temperature of the compressor is reduced to 80°C, the opening of the stabilized electronic expansion valve is 240 steps, and the indoor unit evaporator tube temperature is 9°C, achieving the purpose of not reducing the compressor operating frequency or protecting the shutdown. Ensure the cooling effect.

Under the cooling condition of 48℃ (indoor dry/wet bulb temperature: 32/23, outdoor dry/wet bulb temperature: 48/34), when the upper air outlet 2 and lower air outlet 3 are both open, at this time The operating frequency of the compressor is 50Hz, the constant a is 0.7, the constant b is 11, the ambient temperature of the outdoor unit is 48°C, the target discharge temperature of the compressor is 94°C, and the opening of the electronic expansion valve found by the special experimental equipment is 168 Step, the indoor unit evaporator tube temperature is 13°C. At this time, only the lower air outlet 3 is closed. When the indoor unit evaporator tube temperature drops to 5°C, start to adjust the opening of the electronic expansion valve, and other parameters remain unchanged. The target discharge temperature of the compressor is reduced to 75°C, the opening of the stabilized electronic expansion valve is 210 steps, and the indoor unit evaporator tube temperature is 8°C, so as to achieve the purpose of not reducing the compressor operating frequency or protecting the shutdown. Ensure the cooling effect.

In the above description, the constant a and/or the constant b can be adjusted to determine the electronic expansion valve that needs to be raised based on the reduced target discharge temperature of the compressor when switching to the single outlet cooling mode. The amount of increase in opening. Therefore, without reducing the operating frequency of the compressor, the tube temperature of the indoor heat exchanger (ie, the evaporator) can be effectively prevented from falling to the shutdown protection temperature, and the air conditioner can be prevented from shutting down, thereby improving the cooling in the single outlet cooling mode. The effect, in turn, enhances the user experience.

Fig. 4 is a structural block diagram of a control system of an air conditioner according to an embodiment of the present disclosure. As shown in FIG. 4, a control system 400 of an air conditioner according to an embodiment of the present disclosure includes: a detection module 410 and a control module 420.

Wherein, the detection module 410 is configured to detect whether the indoor evaporator tube temperature drops to a first predetermined temperature when the air conditioner is in a single outlet cooling mode, where the first predetermined temperature is greater than the shutdown protection temperature. The control module 420 is used for increasing the opening degree of the throttling device when the temperature of the indoor evaporator tube drops to the first predetermined temperature.

In an embodiment of the present disclosure, the single-vent cooling mode refers to a cooling mode in which one of the first air outlet and the second air outlet is closed and the other air outlet emits air. The evaporator tube temperature refers to the indoor evaporator tube temperature detected at the side of the one air outlet.

In an embodiment of the present disclosure, it further includes: a determining module (not shown in FIG. 4) for determining the compressor target discharge temperature according to the cooling conditions when the air conditioner is in the single-outlet cooling mode, And the increase of the opening degree of the throttle device is determined according to the target exhaust temperature of the compressor.

In an embodiment of the present disclosure, the control module 420 is configured to increase the opening degree of the throttle device according to an increase in the opening degree of the throttle device.

According to the control system of the air conditioner of the embodiment of the present disclosure, when the air conditioner is operating in the single outlet cooling mode, it is possible to increase the throttling device (such as the electronic expansion valve of the outdoor unit) without reducing the operating frequency of the compressor. The opening method increases the flow of refrigerant, thereby effectively preventing the tube temperature of the indoor heat exchanger (ie: evaporator) from falling to the shutdown protection temperature, avoiding the shutdown of the air conditioner, thereby improving the cooling in the single-port air cooling mode The effect, in turn, enhances the user experience.

It should be noted that the specific implementation manner of the air conditioner control system in the embodiment of the present disclosure is similar to the specific implementation manner of the air conditioner control method in the embodiment of the present disclosure. For details, please refer to the description of the method section, which will not be repeated here.

Further, an embodiment of the present disclosure discloses an air conditioner, including a memory, a processor, and an air conditioner control program stored in the memory and capable of running on the processor. When the processor executes the air conditioner control program, The air conditioner control method described in any one of the above embodiments is implemented. When the air conditioner operates in the single-port cooling mode, it can increase the refrigerant flow by increasing the opening of the throttling device (such as the electronic expansion valve of the outdoor unit) without reducing the operating frequency of the compressor. It can effectively prevent the tube temperature of the indoor heat exchanger (ie, the evaporator) from falling to the shutdown protection temperature, and avoid the shutdown of the air conditioner, thereby improving the cooling effect in the single outlet cooling mode, thereby enhancing the user experience.

In addition, other configurations and functions of the air conditioner according to the embodiments of the present disclosure are known to those of ordinary skill in the art, and will not be repeated here.

The computer-readable storage medium of the embodiment of the present disclosure has a control program of the air conditioner stored thereon, and the control program of the air conditioner is executed by a processor to realize the control method of the air conditioner according to any one of the foregoing embodiments of the present disclosure.

The aforementioned computer-readable storage medium may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or a combination of any of the above. More specific examples of computer-readable storage media (non-exhaustive list) include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (Read Only Memory) ; Hereinafter referred to as: ROM), Erasable Programmable Read Only Memory (hereinafter referred to as: EPROM) or flash memory, optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic memory Pieces, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in combination with an instruction execution system, apparatus, or device.

The computer-readable signal medium may include a data signal propagated in baseband or as a part of a carrier wave, and computer-readable program code is carried therein. This propagated data signal can take many forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium. The computer-readable medium may send, propagate, or transmit the program for use by or in combination with the instruction execution system, apparatus, or device .

The program code contained on the computer-readable medium can be transmitted by any suitable medium, including, but not limited to, wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

The computer program code for performing the operations of the present disclosure can be written in one or more programming languages or a combination thereof. The programming languages include object-oriented programming languages—such as Java, Smalltalk, C++, and also conventional Procedural programming language-such as "C" language or similar programming language. The program code can be executed entirely on the user's computer, partly on the user's computer, executed as an independent software package, partly on the user's computer and partly executed on a remote computer, or entirely executed on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including local area network (Local Area Network; hereinafter referred to as: LAN) or Wide Area Network (hereinafter referred to as: WAN), or Connect to an external computer (for example, use an Internet service provider to connect via the Internet).

Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

An air conditioner control method, wherein the indoor unit of the air conditioner has a first air outlet and a second air outlet, and the method includes:

When the air conditioner is in a single-outlet cooling mode, detecting whether the temperature of the indoor evaporator tube drops to a first predetermined temperature, where the first predetermined temperature is greater than the shutdown protection temperature;

If it is, increase the opening of the throttling device.
The air conditioner control method according to claim 1, wherein the single-port air outlet cooling mode refers to cooling in which one of the first air outlet and the second air outlet is closed and the other air outlet discharges air Mode, the indoor evaporator tube temperature refers to the indoor evaporator tube temperature detected at the side of the one air outlet.
The air conditioner control method according to claim 1 or 2, further comprising:

When the air conditioner is in a single-outlet cooling mode, determining the target discharge temperature of the compressor according to the cooling operating conditions;

The amount of increase in the opening degree of the throttle device is determined according to the target exhaust temperature of the compressor.
The air conditioner control method according to claim 3, wherein said increasing the opening degree of the throttle device comprises:

The opening degree of the throttle device is increased according to the increase amount of the opening degree of the throttle device.
An air conditioner control system, wherein the indoor unit of the air conditioner has a first air outlet and a second air outlet, and the system includes:

The detection module is configured to detect whether the temperature of the indoor evaporator tube drops to a first predetermined temperature when the air conditioner is in a single-outlet cooling mode, where the first predetermined temperature is greater than the shutdown protection temperature;

The control module is used to increase the opening degree of the throttling device when the indoor evaporator tube temperature drops to the first predetermined temperature.
The air conditioner control system according to claim 5, wherein the single outlet cooling mode refers to a cooling in which one of the first air outlet and the second air outlet is closed and the other air outlet discharges air Mode, the indoor evaporator tube temperature refers to the indoor evaporator tube temperature detected at the side of the one air outlet.
The air conditioner control system according to claim 5 or 6, further comprising:

The determining module is used to determine the target discharge temperature of the compressor according to the cooling operating conditions when the air conditioner is in the single-outlet cooling mode, and determine the opening degree of the throttling device according to the target discharge temperature of the compressor Increase the amount.
The air conditioner control system according to claim 7, wherein the control module is configured to increase the opening degree of the throttle device according to an increase in the opening degree of the throttle device.
An air conditioner, comprising a memory, a processor, and an air conditioner control program stored in the memory and capable of running on the processor. When the processor executes the air conditioner control program, the control program of the air conditioner is implemented according to claims 1-4 Any of the control methods of the air conditioner.
A computer-readable storage medium having a control program of an air conditioner stored thereon, wherein the control program of the air conditioner is executed by a processor to realize the control method of the air conditioner according to any one of claims 1-4.