WO2021128645A1

WO2021128645A1 - Method and device for controlling expansion valve, and air conditioner

Info

Publication number: WO2021128645A1
Application number: PCT/CN2020/082952
Authority: WO
Inventors: 李辉增; 樊明敬; 郝本华; 刘庆赟; 张海超; 张盼盼; 杨通
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2019-12-23
Filing date: 2020-04-02
Publication date: 2021-07-01
Also published as: CN111043737A

Abstract

A method and device for controlling an expansion valve, and an air conditioner. The method comprises: when a change value of a frequency of a compressor is larger than a set frequency value, obtaining an operation mode of an air conditioner; determining an adjustment value of the opening of the expansion valve according to the change value and the operation mode; and adjusting the opening of the expansion valve according to the adjustment value. In this case, when the change value of the frequency of the compressor is larger than the set frequency value, the opening of the expansion valve can be adjusted timely, the pressure on an air conditioning system due to overlarge change of the frequency of the compressor is reduced, the risk of damage of a refrigerant pipeline due to vibration is reduced, an air outlet temperature can further be adjusted to satisfy requirements of a user within a reasonable time period, and the user experience is improved.

Description

Method and device for controlling expansion valve, and air conditioner

This application is filed based on a Chinese patent application with an application number of 201911338308.6 and an application date of December 23, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

This application relates to the field of air conditioning control technology, for example, to a method and device for expansion valve control, and an air conditioner.

Background technique

At present, the automatic adjustment of the opening of the expansion valve is commonly used in household inverter air conditioning systems to control the flow of refrigerant to achieve the corresponding cooling and heating effects.

In the prior art, the expansion valve is usually adjusted according to the initial opening within a set time, and then the adjustment step value of the opening is determined according to the target discharge temperature of the compressor, and the expansion valve is gradually adjusted according to the set time period. Opening.

In the process of implementing the embodiments of the present disclosure, it was found that the related technology has at least the following problems: when the compressor frequency change value is too large, the untimely adjustment of the expansion valve opening will increase the pressure of the air conditioning system and increase the refrigerant pipeline due to vibration. Risk of damage.

Summary of the invention

In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general comment, nor is it intended to determine key/important components or describe the protection scope of these embodiments, but serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide a method and device for expansion valve control, and an air conditioner, so as to solve the problem that when the compressor frequency change value is too large, the expansion valve opening is not adjusted in time to increase the risk of damage to the refrigerant pipeline due to vibration technical problem.

In some embodiments, the method includes:

When the change value of the compressor frequency is within the set range, obtain the operating mode of the air conditioner;

Determining the adjustment value of the opening of the expansion valve according to the change value and the operation mode;

The opening degree of the expansion valve is adjusted according to the adjustment value.

In some embodiments, the device includes:

The acquiring module is configured to acquire the operating mode of the air conditioner when the change value of the compressor frequency is within a set range;

A determining module configured to determine an adjustment value of the opening of the expansion valve according to the change value and the operating mode;

The adjustment module is configured to adjust the opening degree of the expansion valve according to the adjustment value.

In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for controlling an expansion valve when the program instructions are executed.

In some embodiments, the air conditioner includes the aforementioned device for expansion valve control.

The method and device for expansion valve control, and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

When the change value of the compressor frequency is greater than the set frequency value, avoid extending the adjustment time according to the initial opening during the set time, and determine the adjustment value of the expansion valve opening through the operation mode of the air conditioner and the change value of the compressor frequency. Adjust the opening of the expansion valve according to the adjustment value in time, reduce the pressure on the air conditioning system caused by excessive changes in the compressor frequency, reduce the risk of damage to the refrigerant pipeline due to vibration, and adjust the outlet air temperature within a reasonable time To meet user needs and improve user experience.

The above general description and the following description are only exemplary and explanatory, and are not used to limit the application.

Description of the drawings

One or more embodiments are exemplified by the accompanying drawings. These exemplified descriptions and drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

FIG. 1 is a schematic flowchart of a method for controlling an expansion valve according to an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of a device for expansion valve control provided by an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of an expansion valve control device provided by an embodiment of the present disclosure.

Detailed ways

In order to have a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a number of details are used to provide a sufficient understanding of the disclosed embodiments. However, without these details, one or more embodiments can still be implemented. In other cases, in order to simplify the drawings, well-known structures and devices may be simplified for display.

The terms “first” and “second” in the description and claims of the embodiments of the present disclosure and the above-mentioned 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 used in this way can be interchanged under appropriate circumstances for the purposes of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions.

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

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

The term "and/or" refers to an association relationship describing objects, which means that there can be three relationships. For example, A and/or B means: A or B, or, A and B.

According to the embodiment of the present disclosure, when the change value of the compressor frequency is less than or equal to the set value, it operates according to the initial opening within the set time, and then determines the adjustment step value of the opening according to the target discharge temperature of the compressor. The logic control of setting the time period to gradually adjust the opening of the expansion valve can meet the continuous and stable operation of the system, so there is no need to force the adjustment of the opening of the electronic expansion valve when the change of the compressor frequency is less than the set value. The present disclosure is mainly aimed at controlling when the change value of the compressor frequency is greater than the set value.

Fig. 1 is a schematic flowchart of a method for controlling an expansion valve provided by an embodiment of the present disclosure. The method includes the following steps:

S101: When the change value of the compressor frequency is greater than the set frequency value, obtain the operation mode of the air conditioner.

Optionally, the set frequency value is 10Hz～15Hz. Optionally, the set frequency value is 10Hz, 11Hz, 12Hz, 13Hz, 14Hz or 15Hz. Among them, the set frequency value is determined according to the rated frequency of the compressor. The larger the rated frequency of the compressor, the larger the set frequency value.

In different embodiments, there are many situations that cause the change value of the compressor frequency to be greater than the set frequency value.

In some embodiments, the frequency of the compressor changes rapidly due to the change of the operating mode. For example, when the defrosting mode is turned on in the cooling mode, the refrigerant circulation path is changed, the conversion frequency of the compressor to adapt to the mode is reduced, or in the cooling mode. When the self-cleaning mode is turned on, the required cooling capacity increases and the compressor frequency increases rapidly.

In some embodiments, due to a large change in the target set temperature or a large change in the fan speed, the compressor frequency changes rapidly.

In either case, the change value of the compressor frequency is greater than the set frequency value. When the change value of the compressor frequency is greater than the set frequency value, by operating according to the initial opening within the set time, and then according to the compressor target exhaust The temperature determines the adjustment step value of the opening degree and gradually adjusts the logic control of the expansion valve opening degree according to the set time period. According to the configuration of different air-conditioning systems, the system will change the compressor frequency after 10 minutes and more than 10 minutes. In order to be stable, the adjustment time is too long. When the compressor frequency change value is too large, the untimely adjustment of the expansion valve opening will increase the pressure of the air-conditioning system, resulting in aggravated pipeline vibration and high noise. In severe cases, it will cause the refrigerant pipeline to vibrate damage.

Among them, the operating modes include: cooling mode and heating mode. During the operation of the air-conditioning system, the change of the opening degree of the electronic expansion valve has a more sensitive effect on the outlet air temperature. The heating mode is usually more sensitive than the cooling mode. Therefore, in order to prevent the adjustment of the electronic expansion valve from reducing the user experience of the outlet air temperature, the operating mode of the air conditioner is obtained before the opening degree of the electronic expansion valve is adjusted.

S102: Determine an adjustment value of the opening degree of the expansion valve according to the change value and the operating mode.

There are many ways to determine the adjustment value of the expansion valve opening according to the change value and the operating mode.

In some embodiments, the change value corresponds to a set expansion valve opening adjustment value, and in different operating modes, the same change value corresponds to different expansion valve opening adjustment values. The corresponding relationship between the change value, the operation mode and the adjustment value of the expansion valve opening is stored in the air conditioning system. When the adjustment value of the expansion valve opening needs to be determined, it is determined by looking up the table.

In some embodiments, determining the adjustment value of the expansion valve opening according to the change value and the operation mode includes: determining the adjustment coefficient of the expansion valve opening according to the operation mode; and taking the product of the change value and the adjustment coefficient as the adjustment of the expansion valve opening value. Since the change of the electronic expansion valve's opening degree is usually more sensitive to the influence of the outlet air temperature in the heating mode than in the cooling mode, the adjustment coefficient of the expansion valve opening degree is determined according to the operation mode to improve the accuracy of the expansion valve opening degree adjustment .

In some embodiments, determining the adjustment value of the expansion valve opening according to the change value and the operation mode includes: determining the adjustment coefficient of the expansion valve opening according to the operation mode; calculating the basic adjustment value according to the product of the change value and the adjustment coefficient; The adjustment value is compensated, and the compensated basic adjustment value is used as the adjustment value of the expansion valve opening. Depending on the specific application environment, the air-conditioning system needs to further compensate the basic adjustment value to determine the target adjustment value and increase the expansion valve opening adjustment rate on the premise that the basic adjustment value of the expansion valve opening is determined according to the change value and operating mode.

Among them, the calculation formula of the compensation value is as follows:

Pa=Δf×M+N

Among them, Pa is the compensation value of the expansion valve opening, Δf is the change value of the compressor frequency, M is the adjustment coefficient of the expansion valve opening, and N is the compensation value of the expansion valve opening.

In some embodiments, compensating the basic adjustment value includes: determining a compensation value for the opening of the expansion valve according to the operating mode and outdoor ambient temperature; and compensating the basic adjustment value according to the compensation value.

In some embodiments, the outdoor ambient temperature satisfies the set condition.

In some embodiments, the setting condition includes: the outdoor temperature is greater than or equal to the first setting value or less than the second setting value. Wherein, the first set value is greater than the second set value.

In some embodiments, different operating modes correspond to different setting conditions. That is, in different operating modes, the first setting value is different or the second setting value is different, or the first setting value and the second setting value are different.

In a specific embodiment, in the cooling mode, the first set value is 38°C, and the second set value is 22°C. In heating mode, the first setting value is -5°C, and the second setting value is 16°C. In the cooling mode, when the outdoor environment temperature is ≥38℃, the compensation value is determined to be N1, and when the outdoor environment temperature is less than 22℃, the compensation value is determined to be N2. In heating mode, when the outdoor environment temperature is ≥16°C, the compensation value is determined to be N3, and when the outdoor environment temperature is <-5°C, the compensation value is determined to be N4. Among them, N1, N2, N3, and N4 are stored in the air conditioning system.

In some embodiments, the value of N1 is the same as the value of N4. In some embodiments, the value of N2 is the same as the value of N3.

In a specific embodiment, the values of N1 and N4 are 10, and the values of N2 and N3 are -10.

Among them, the compressor discharge temperature is relatively high in the high temperature cooling and low temperature heating modes, and the system pressure is relatively large. When the instantaneous change value of the compressor operating frequency is too large, the system pressure will suddenly change, which will increase the vibration of the pipeline and not only increase the noise. To reduce the risk of pipeline vibration, increase the opening adjustment value of the electronic expansion valve per unit time through the compensation value, reduce the gas-liquid mixing ratio of the refrigerant in the system, and improve the evaporation and condensation effect to achieve the effect of vibration and noise reduction.

In some embodiments, determining the adjustment coefficient of the opening degree of the expansion valve according to the operation mode includes: determining the calculation method of the adjustment coefficient according to the operation mode, and calculating the adjustment coefficient.

In some embodiments, the adjustment coefficient is calculated according to the calculation method and the compressor displacement.

Optionally, when the operating mode is the cooling mode, the adjustment coefficient of the expansion valve opening is calculated as follows:

Among them, M1 is the adjustment coefficient of the expansion valve opening in the cooling mode,

Is the compressor displacement, the unit is cc, and a is the set constant. Optionally, the value of a is 10.

Optionally, when the operating mode is heating mode, the adjustment coefficient of the expansion valve opening is calculated as follows:

Among them, M2 is the adjustment coefficient of the expansion valve opening in heating mode,

Is the compressor displacement, the unit is cc, and b is the set constant. Optionally, the value of b is 8.

S103: Adjust the opening degree of the expansion valve according to the adjustment value.

In some embodiments, the unit adjustment value of the opening of the expansion valve per unit time is determined according to the adjustment value and the set adjustment time, and the opening of the expansion valve is adjusted according to the unit adjustment value. Among them, the setting adjustment time is 5 minutes to 10 minutes. Optionally, set the adjustment time to 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes or 10 minutes. Ensure that the system enters stable operation after adjusting the opening of the expansion valve according to the adjustment within the set time, and during the adjustment process, the temperature of the outlet air changes slowly, which will not reduce the user experience.

In the embodiment of the present disclosure, when the change value of the compressor frequency is greater than the set frequency value, it is avoided that the adjustment time is extended according to the initial opening during the set time, and the expansion valve is determined to be opened by the air conditioner operation mode and the change value of the compressor frequency. It can adjust the opening of the expansion valve according to the adjustment value in time, reduce the pressure of the air conditioning system caused by the excessive change of the compressor frequency, reduce the risk of damage to the refrigerant pipeline due to vibration, and also in a reasonable time The temperature of the outlet air is adjusted to meet user needs and improve user experience.

2 is a schematic structural diagram of a device for controlling an expansion valve provided by an embodiment of the present disclosure. The device includes: an acquisition module 201, a determination module 202, and a control module 203.

The acquiring module 201 is configured to acquire the operating mode of the air conditioner when the change value of the compressor frequency is greater than the set frequency value.

The determining module 202 is configured to determine the adjustment value of the opening degree of the expansion valve according to the change value and the operating mode.

The control module 203 is configured to adjust the opening degree of the expansion valve according to the adjustment value.

In some embodiments, the change value corresponds to a set expansion valve opening adjustment value, and in different operating modes, the same change value corresponds to different expansion valve opening adjustment values. The corresponding relationship between the change value, the operating mode and the adjustment value of the expansion valve opening is stored in the air conditioning system. When the adjustment value of the expansion valve opening needs to be determined, the determination module 202 determines it in the form of a table lookup.

In some embodiments, the determining module 202 includes: a coefficient determining unit and an adjustment value determining unit.

The coefficient determining unit is configured to determine the adjustment coefficient of the opening degree of the expansion valve according to the operation mode.

The adjustment value determining unit is configured to use the product of the change value and the adjustment coefficient as the adjustment value of the opening of the expansion valve. Since the change of the electronic expansion valve's opening degree is usually more sensitive to the influence of the outlet air temperature in the heating mode than in the cooling mode, the adjustment coefficient of the expansion valve opening degree is determined according to the operation mode to improve the accuracy of the expansion valve opening degree adjustment .

In some embodiments, the determination module 202 includes: a coefficient determination unit, a basic adjustment value determination unit, and a compensation unit.

The basic adjustment value determining unit is configured to calculate the basic adjustment value according to the product of the change value and the adjustment coefficient.

The compensation unit is configured to compensate the basic adjustment value, and use the compensated basic adjustment value as the adjustment value of the opening degree of the expansion valve.

According to the specific application environment, the air conditioning system needs to further compensate the basic adjustment value to determine the target adjustment value and increase the expansion valve opening adjustment rate on the premise that the basic adjustment value of the expansion valve opening is determined according to the change value and the operating mode.

Among them, the calculation formula of the compensation value is as follows:

Pa=Δf×M+N

In some embodiments, the compensation unit includes: a determination sub-unit and a compensation sub-unit.

The determining sub-unit is configured to determine the compensation value of the opening degree of the expansion valve according to the operating mode and the outdoor ambient temperature.

The compensation subunit is configured to compensate the basic adjustment value according to the compensation value.

Among them, the compressor discharge temperature is relatively high in the high temperature cooling and low temperature heating modes, and the system pressure is relatively large. When the instantaneous change value of the compressor operating frequency is too large, the system pressure will suddenly change, which will increase the pipeline vibration and not only increase the noise To reduce the risk of pipeline vibration, increase the opening adjustment value of the electronic expansion valve per unit time through the compensation value, reduce the gas-liquid mixing ratio of the refrigerant in the system, and improve the evaporation and condensation effect to achieve the effect of vibration and noise reduction.

In some embodiments, the coefficient determining unit is configured to determine the calculation method of the adjustment coefficient according to the operating mode, and calculate the adjustment coefficient.

In some embodiments, the control module 203 is configured to determine the unit adjustment value of the expansion valve opening in a unit time according to the adjustment value and the set adjustment time, and adjust the opening of the expansion valve according to the unit adjustment value. Among them, the setting adjustment time is 5 minutes to 10 minutes. Optionally, set the adjustment time to 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes or 10 minutes. It is ensured that after adjusting the opening of the expansion valve within the set time, the system enters a stable operation, and during the adjustment process, the air outlet temperature changes slowly, which will not reduce the user experience.

In the embodiments of the present disclosure, when the change value of the compressor frequency is greater than the set frequency value, it is avoided that the adjustment time is extended according to the initial opening during the set time, and the expansion valve is determined to be opened by the air conditioner operation mode and the change value of the compressor frequency. It can adjust the expansion valve opening degree according to the adjustment value in time, reduce the pressure of the air conditioning system caused by the excessive change of the compressor frequency, reduce the risk of damage to the refrigerant pipeline due to vibration, and also in a reasonable time The temperature of the outlet air is adjusted to meet user needs and improve user experience.

The embodiment of the present disclosure provides a device for controlling an expansion valve, including a processor and a memory storing program instructions. The processor is configured to execute the above-mentioned method for controlling an expansion valve when the program instructions are executed.

As shown in FIG. 3, an embodiment of the present disclosure provides a device for controlling an expansion valve, including a processor 300 and a memory 301. Optionally, the device may further include a communication interface (Communication Interface) 302 and a bus 303. Among them, the processor 300, the communication interface 302, and the memory 301 can communicate with each other through the bus 303. The communication interface 302 can be used for information transmission. The processor 300 may call the logic instructions in the memory 301 to execute the method for controlling the expansion valve of the foregoing embodiment.

In addition, the aforementioned logic instructions in the memory 301 can be implemented in the form of software functional units and when sold or used as independent products, they can be stored in a computer readable storage medium.

As a computer-readable storage medium, the memory 301 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 300 executes functional applications and data processing by running the program instructions/modules stored in the memory 301, that is, implements the method for controlling the expansion valve in the foregoing embodiment.

The memory 301 may include a program storage area and a data storage area. The program storage area can store an operating system and at least one application program required for a function; the data storage area can store data created according to the use of the terminal device. In addition, the memory 301 may include a high-speed random access memory, and may also include a non-volatile memory.

An embodiment of the present disclosure provides an air conditioner including the above-mentioned device for controlling an expansion valve.

The embodiments of the present disclosure provide a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are configured to execute the above-mentioned method for controlling an expansion valve.

The embodiments of the present disclosure provide a computer program product, the computer program product includes a computer program stored on a computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer program The computer executes the above-mentioned method for controlling the expansion valve.

The aforementioned computer-readable 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 a software product. The computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which can be a personal computer, a server, or a network). Equipment, etc.) execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may 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 disks or optical disks, etc. A medium that can store program codes, or it can be a transient 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 include structural, logical, electrical, procedural, and other changes. The embodiments only represent possible changes. Unless explicitly required, the individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Moreover, the terms used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms "a" (a), "an" (an) and "the" (the) are intended to also include plural forms . Similarly, the term "and/or" as used in this application refers to any and all possible combinations that include one or more of the associated lists. In addition, when used in this application, the term "comprise" (comprise) and its variants "comprises" and/or including (comprising) and the like refer to the stated features, wholes, steps, operations, elements, and/or The existence of components does not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components, and/or groups of these. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, or device that includes the element. In this article, each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, then the related parts can be referred to the description of the method parts.

Those skilled in the art may realize that the units and algorithm steps of the examples described in combination 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 constraint conditions of the technical solution. The technicians can use different methods for each specific application to realize the described functions, but such realization should not be considered as going beyond the scope of the embodiments of the present disclosure. The technicians can clearly understand that, for the convenience and conciseness of the description, the specific working process of the system, device, and unit described above 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, and there may be other divisions in actual implementation, 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 displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, the functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

The flowcharts and block diagrams in the accompanying drawings show the possible implementation architecture, functions, and operations of the system, method, and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more functions for realizing the specified logic function. Executable instructions. In some alternative implementations, the functions marked in the block may also occur in a different order from the order marked in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in a different order than disclosed in the description, and sometimes there is no specific operation or step between different operations or steps. order. For example, two consecutive operations or steps can actually be performed substantially in parallel, and they can sometimes be performed in the reverse order, which may depend on the functions involved. Each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by dedicated hardware Realized in combination with computer instructions.

Claims

A method for controlling an expansion valve, which is characterized in that it comprises:

When the change value of the compressor frequency is greater than the set frequency value, obtain the operating mode of the air conditioner;

Determining the adjustment value of the opening of the expansion valve according to the change value and the operation mode;

The opening degree of the expansion valve is adjusted according to the adjustment value.
The method according to claim 1, wherein determining the adjustment value of the expansion valve opening degree according to the change value and the operation mode comprises:

Determining the adjustment coefficient of the opening of the expansion valve according to the operating mode;

The product of the change value and the adjustment coefficient is used as the adjustment value of the opening of the expansion valve.
The method according to claim 1, wherein determining the adjustment value of the expansion valve opening degree according to the change value and the operation mode comprises:

Determining the adjustment coefficient of the opening of the expansion valve according to the operating mode;

Calculating a basic adjustment value according to the product of the change value and the adjustment coefficient;

The basic adjustment value is compensated, and the compensated basic adjustment value is used as the adjustment value of the opening of the expansion valve.
The method according to claim 3, wherein compensating the basic adjustment value comprises:

Determining the compensation value of the opening degree of the expansion valve according to the operating mode and the outdoor ambient temperature;

The basic adjustment value is compensated according to the compensation value.
The method according to claim 4, wherein the outdoor ambient temperature satisfies a set condition.
The method according to claim 5, wherein different operating modes correspond to different setting conditions.
The method according to any one of claims 2 to 6, wherein determining the adjustment coefficient of the opening of the expansion valve according to the operating mode comprises:

The calculation method of the adjustment coefficient is determined according to the operation mode, and the adjustment coefficient is calculated.
The method according to claim 7, wherein the adjustment coefficient is calculated according to the calculation method and the compressor displacement.
A device for controlling an expansion valve, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute any one of claims 1 to 8 when executing the program instructions The described method for expansion valve control.
An air conditioner, characterized by comprising the device for controlling an expansion valve according to claim 9.