CN113339946A - Air conditioner operation control method and device, air conditioner and computer storage medium - Google Patents

Air conditioner operation control method and device, air conditioner and computer storage medium Download PDF

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Publication number
CN113339946A
CN113339946A CN202110547462.5A CN202110547462A CN113339946A CN 113339946 A CN113339946 A CN 113339946A CN 202110547462 A CN202110547462 A CN 202110547462A CN 113339946 A CN113339946 A CN 113339946A
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Prior art keywords
air conditioner
temperature
superheat degree
actual
temperature difference
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CN202110547462.5A
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CN113339946B (en
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沈庆政
代文杰
杜泽锋
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Guangdong TCL Intelligent HVAC Equipment Co Ltd
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Guangdong TCL Intelligent HVAC Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The embodiment of the application provides an air conditioner operation control method, an air conditioner operation control device, an air conditioner and a computer storage medium, the air conditioner operation control method provided by the application obtains the inlet end refrigerant temperature and the outlet end refrigerant temperature of a gas-liquid separation heat exchanger, calculates the actual temperature difference, obtains the actual superheat degree of an air conditioner condenser when the actual temperature difference is smaller than the target temperature difference, and then judges whether the opening degree of a valve body for controlling the flow rate of the refrigerant is reduced or the frequency of an air conditioner compressor is increased by utilizing the size relation between the actual superheat degree and the maximum allowable superheat degree. The application provides an air conditioner operation control method, when guaranteeing to increase gas-liquid separation heat exchanger's heat transfer effect, still guaranteed the superheat degree of condenser in the within range that allows, and the operating frequency of compressor is in normal operating range, has realized the stability of air conditioner whole operation promptly.

Description

Air conditioner operation control method and device, air conditioner and computer storage medium
Technical Field
The embodiment of the application relates to the technical field of air conditioners, in particular to an air conditioner operation control method and device, an air conditioner and a computer storage medium.
Background
In order to solve the problems that an air conditioner refrigerates at high temperature, the throttling sound of an inner machine is very large, and when the air conditioner heats at low temperature, low-temperature and low-pressure refrigerants enter a compressor to easily cause the liquid return of the compressor, the prior art generally utilizes a heat exchanger to exchange heat between the high-temperature and high-pressure refrigerants at a high-pressure side and the low-temperature and low-pressure refrigerants at a low-temperature side. When refrigerating at high temperature, the refrigerant entering the inner machine can be in a pure liquid state, so that the phenomenon that the throttling sound of the inner machine is loud is avoided, and when heating at low temperature, the low-temperature low-pressure refrigerant entering the compressor can be heated, so that the liquid return of the compressor is avoided.
At present, a heat exchanger which is commonly used is a plate heat exchanger, however, the plate heat exchanger is complex to control and high in cost, and in order to save cost, the prior art provides an air conditioner which takes a gas-liquid separator as a heat exchanger. Compared with the conventional plate heat exchanger, the gas-liquid separation heat exchanger has low heat exchange efficiency, and the heat exchange efficiency of the gas-liquid separation heat exchanger is generally increased by controlling the opening of certain valves. However, the existing air conditioner operation control method only requires the gas-liquid separation heat exchanger to achieve the expected heat exchange effect, and does not consider the operation stability of other components of the air conditioner, which often causes the abnormal phenomena of overheating of the internal and external units or overload of the compressor, etc. of the air conditioner.
Therefore, the existing air conditioner operation control method also has the technical problem that the integral reliable operation of the air conditioner cannot be ensured.
Disclosure of Invention
The embodiment of the application provides an air conditioner operation control method and device, an air conditioner and a computer storage medium, and aims to solve the technical problems of low heat exchange efficiency and unsatisfactory heat exchange effect of the existing air conditioner adopting a gas-liquid separation heat exchanger.
In one aspect, an embodiment of the present application provides an air conditioner operation control method, including:
acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
if the actual temperature difference is smaller than the preset target temperature difference, acquiring the actual superheat degree of the air conditioner condenser;
if the actual superheat degree is smaller than the preset maximum allowable superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant;
and if the actual superheat degree is larger than or equal to the preset maximum allowable superheat degree, increasing the frequency of the compressor of the air conditioner.
On the other hand, an embodiment of the present application further provides an air conditioner operation control device, including:
the actual temperature difference calculation module is used for acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
the actual superheat degree acquisition module is used for acquiring the actual superheat degree of the air conditioner condenser if the actual temperature difference is smaller than a preset target temperature difference;
the valve body opening control module is used for reducing the opening of a valve body for controlling the flow rate of the refrigerant if the actual superheat degree is less than the preset maximum allowable superheat degree;
and the compressor frequency control module is used for increasing the frequency of the compressor of the air conditioner if the actual superheat degree is greater than or equal to the preset maximum allowable superheat degree.
On the other hand, the embodiment of the application also provides an air conditioner, which comprises a compressor, an inner machine, an outer machine, a gas-liquid separation heat exchanger for realizing the heat exchange of the refrigerant at the high pressure side and the low pressure side of the air conditioner, and
one or more processors;
a memory; and
one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the air conditioner operation control method.
On the other hand, the embodiment of the present application further provides a storage medium, on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the air conditioner operation control method.
The embodiment of the application provides an air conditioner operation control method, when the heat exchange effect of a gas-liquid separation heat exchanger needs to be increased, the actual superheat degree of an air conditioner condenser is obtained, and the comparison result of the actual superheat degree and the maximum allowable superheat degree is utilized to determine whether the heat exchange effect of the gas-liquid separation heat exchanger is adjusted by reducing the valve body opening degree used for controlling the flow speed of a refrigerant or increasing the frequency of a compressor of the air conditioner. The heat exchange effect of the gas-liquid separation heat exchanger is ensured to be increased, the superheat degree of the condenser is ensured to be within an allowable range, the operation frequency of the compressor is within a normal operation range, and the stability of the overall operation of the air conditioner is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a scenario of an air conditioner operation control according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating a first embodiment of an air conditioner operation control method according to an embodiment of the present disclosure;
FIG. 3 is a flowchart illustrating a second embodiment of an operation control method of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a third embodiment of an air conditioner operation control method according to an embodiment of the present application;
FIG. 5 is a schematic flow chart illustrating a fourth embodiment of an air conditioner operation control method according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating a fifth embodiment of an operation control method of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a sixth embodiment of an operation control method of an air conditioner according to an embodiment of the present application;
fig. 8 is a schematic flowchart of a seventh embodiment of an operation control method of an air conditioner according to an embodiment of the present application;
FIG. 9 is a functional block diagram of an operation control device of an air conditioner according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an air conditioner operation control device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the embodiments of the present application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the embodiments herein.
The embodiments of the present application provide an air conditioner operation control method and apparatus, an air conditioner, and a storage medium, which are described in detail below.
The air conditioner operation control method in the embodiment of the invention is applied to an air conditioner operation control device, the air conditioner operation control device is arranged in the air conditioner, the air conditioner comprises necessary components such as a compressor, an internal unit, an external unit and a gas-liquid separation heat exchanger, and is also provided with one or more processors, a memory and one or more application programs, wherein the one or more application programs are stored in the memory and are configured to be executed by the processor.
As shown in fig. 1, fig. 1 is a schematic view of an operation control scenario of an air conditioner according to an embodiment of the present disclosure, which can also be understood as an internal structure diagram of the air conditioner, in the operation control scenario of the air conditioner according to the embodiment of the present disclosure, the air conditioner mainly includes a compressor 101, an inner unit 102, an outer unit 103, and a gas-liquid separation heat exchanger 104, and further, a four-way valve, an inner unit expansion valve, a heating valve commonly used for the air conditioner, a first temperature sensor disposed on the upper and outer units for collecting an external environment temperature, a second temperature sensor and a third temperature sensor disposed on two ends of the inner unit for collecting a superheat degree of the inner unit, a fourth temperature sensor and a fifth temperature sensor disposed on two ends of the outer unit for collecting a superheat degree of the outer unit of the air conditioner, a sixth temperature sensor and a seventh temperature sensor disposed on two sides of a high-pressure refrigerant channel in the gas-liquid separation heat exchanger, and an eighth temperature sensor disposed on two sides of a low-pressure channel in the gas-liquid separation heat exchanger And the ninth temperature sensor belong to the conventional technical means known to those skilled in the art, and for the sake of simplifying the schematic diagram, the above conventional structure is not shown in fig. 1, and those skilled in the art can accurately know the specific location and connection relationship thereof by combining with the common general knowledge in the art.
In the scene schematic diagram, it is emphasized that, unlike the conventional air conditioner structure including a plate heat exchanger, the outdoor unit in the present application is connected to the indoor unit through two branches, one of the branches is directly connected to the indoor unit, and the other branch is connected to the indoor unit through a high-pressure refrigerant channel in the gas-liquid separation heat exchanger, so as to achieve heat exchange in the gas-liquid separator. And stop valves are arranged on the two branches to realize the control of the on-off of the branches, so that whether heat exchange is carried out through the gas-liquid separator is controlled.
It should be noted that the above-mentioned scenario belongs to a general air conditioner structure applying a gas-liquid separation heat exchanger, and in this technique, techniques such as hot gas bypass, enhanced vapor injection and the like known in the art can be also fused, and since there is no conflict between the gas-liquid separation heat exchange and the techniques such as hot gas bypass, enhanced vapor injection and the like, the specific fused scheme belongs to the simple superposition of the technical scheme, and the scheme can be obtained by simple reasoning after a person skilled in the art knows the scenario diagram of the application, so the scenario diagram of the superposition of other technical schemes is not specifically described in the application.
The air conditioner operation control device 110 in the embodiment of the present invention may be understood as a central processing chip of an air conditioner, which is used for processing acquired data and completing control of air conditioner components, and is mainly used for: acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature; if the actual temperature difference is smaller than the preset target temperature difference, acquiring the actual superheat degree of the air conditioner condenser; if the actual superheat degree is smaller than the preset maximum allowable superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant; and if the actual superheat degree is larger than or equal to the maximum allowable superheat degree, increasing the frequency of the compressor of the air conditioner.
It should be noted that the scene diagram of the air conditioner operation control shown in fig. 1 is only an example, and the scene of the operation control described in the embodiment of the present invention is for more clearly explaining the technical solution of the embodiment of the present invention, and does not constitute a limitation on the technical solution provided in the embodiment of the present invention.
Based on the above air conditioner operation control scenario, an embodiment of an air conditioner operation control method is provided.
As shown in fig. 2, fig. 2 is a schematic flow chart of a first embodiment of an air conditioner operation control method according to an embodiment of the present application.
In the embodiment of the present application, an air conditioner operation control method is provided, and specifically, the air conditioner operation control method provided by the present application includes steps 201 and 205:
and 201, acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature.
In the embodiment of the present application, it can be understood that, as can be known from the related content in fig. 1, the gas-liquid separation heat exchanger 104 includes a low-pressure refrigerant channel and a high-pressure refrigerant channel, that is, the inlet-end refrigerant temperature and the outlet-end refrigerant temperature of the gas-liquid separation heat exchanger may refer to the refrigerant temperatures at two ends of the low-pressure refrigerant channel or may refer to the refrigerant temperatures at two ends of the high-pressure refrigerant channel, but considering that under normal conditions, the heat exchange coefficients of the low-pressure refrigerant channel and the high-pressure refrigerant channel are the same, that is, the difference between the refrigerant temperatures at two ends of the low-pressure refrigerant channel is theoretically equal to the refrigerant temperatures at two ends of the high-pressure refrigerant channel, so in the embodiment of the present application, it is not limited whether the high-pressure refrigerant channel or the low-pressure refrigerant channel in the gas-liquid separation heat exchanger is used to calculate the actual temperature difference. Of course, it is preferable that the actual temperature difference, that is, the difference between the temperatures collected by the sixth temperature sensor and the seventh temperature sensor, is calculated by using the inlet-end refrigerant temperature and the outlet-end refrigerant temperature of the high-pressure refrigerant passage when the air conditioner is in the cooling state. And when the air conditioner is in a heating state, the actual temperature difference is calculated by adopting the inlet end refrigerant temperature and the outlet end refrigerant temperature of the low-pressure refrigerant channel, namely the difference value of the temperatures acquired by the eighth temperature sensor and the ninth temperature sensor.
And 202, judging whether the actual temperature difference is smaller than a preset target temperature difference. If the actual temperature difference is smaller than the preset target temperature difference, executing step 203; and if the actual temperature difference is larger than or equal to the preset target temperature difference, executing other steps.
In the embodiment of the present application, the target temperature difference is preferably determined based on the ambient temperature and the cooling capacity ratio of the air conditioner, and is particularly determined by a large number of test data analysis statistics. For specific contents, reference may be made to subsequent fig. 6 to fig. 7 and the description thereof.
In this application embodiment, realize the control to gas-liquid separation heat exchanger heat exchange efficiency through the difference in temperature between gas-liquid separation heat exchanger exit end refrigerant temperature and the entry end refrigerant temperature, it is specific, if the actual difference in temperature does not reach preset target difference in temperature, then indicate that gas-liquid separation heat exchanger heat exchange efficiency is not enough, and the heat transfer effect is not good, and the air conditioner system still can have the phenomenon that the interior machine throttle sound is big or the compressor returns the liquid. Therefore, it is necessary to further improve the heat exchange effect of the gas-liquid separation heat exchanger by the subsequent steps.
And 203, acquiring the actual superheat degree of the air conditioner condenser, and judging whether the actual superheat degree is less than the preset maximum allowable superheat degree. If the actual superheat degree is less than the preset maximum allowable superheat degree, executing step 204; if the actual superheat is greater than or equal to the maximum allowable superheat, step 205 is performed.
In the embodiment of the application, compared with the conventional technical scheme that the air conditioning system is directly adjusted according to the actual temperature difference and the target temperature difference to improve the heat exchange efficiency of the gas-liquid separation heat exchanger, the air conditioning system and the method take the actual superheat factor of the air conditioning condenser into consideration. In general, when the opening degree of a valve body for controlling the flow rate of refrigerant is reduced, and the heat exchange time of refrigerant in a gas-liquid separator is increased. Therefore, the actual superheat degree of the air conditioner condenser is obtained and is compared with the preset maximum allowable superheat degree, and whether the heat exchange efficiency of the gas-liquid separation heat exchanger is improved by adjusting the opening degree of the valve body for controlling the flow speed of the refrigerant is judged.
It should be noted that, when the air conditioner is in a cooling condition, the indoor unit is generally regarded as a condenser, and when the air conditioner is in a heating condition, the outdoor unit is generally regarded as a condenser, which is not described herein again. Therefore, based on different actual working conditions of the air conditioner, the actual superheat degree of the air conditioner condenser can be calculated according to the temperatures collected by the second temperature sensor and the third temperature sensor or according to the temperatures collected by the fourth temperature sensor and the fifth temperature sensor.
In the embodiment of the present application, the preset maximum allowable superheat degree is calculated based on the superheat degree of the condenser during steady operation, which is measured in advance based on a large amount of test data, and specifically, as a preferable scheme, the maximum allowable superheat degree is set to be 4 ℃ under a cooling condition, and the maximum allowable superheat degree is set to be 3 ℃ under a heating condition.
204, the opening degree of a valve body for controlling the flow rate of the refrigerant is reduced.
In the embodiment of the present application, if the actual superheat degree is less than the maximum allowable superheat degree, the degree of superheat of the corresponding condenser may be increased by decreasing the opening degree of the valve for controlling the flow rate of the refrigerant.
In this embodiment of the application, based on the test data, for different working conditions, in order to better improve the heat exchange efficiency, the valve bodies adjusted at this time are also different, and specifically, refer to fig. 3 and the contents of the explanation thereof.
In the embodiment of the present application, in order to achieve more accurate control of the opening degree of the valve body, a target superheat degree is also preset, and when the superheat degree is in different ranges, the step lengths for specifically adjusting the opening degree of the valve body are also different, specifically refer to fig. 4 and the contents explained therein.
205, increase the frequency of the air conditioner compressor.
In this application embodiment, if actual superheat degree is greater than the maximum allowable superheat degree, indicate that the condenser is outside normal operating condition, then the unable rethread reduces the aperture of the valve body of control refrigerant velocity of flow and increases heat exchanger efficiency, consequently, need improve the heat transfer effect through increasing the compressor frequency, also improve the difference in temperature of high-pressure side and low-pressure side, nevertheless can increase the load of air conditioner, lifting cost.
In the embodiment of the present application, specifically, the frequency of the compressor is adjusted according to the difference between the actual temperature difference and the target temperature difference, and please refer to fig. 5 and the description thereof for a specific implementation process.
In the embodiment of the present application, it should be noted that the method for controlling the operation of the air conditioner proposed by the present application belongs to the circulation control. Specifically, the temperature difference between the inlet-end refrigerant temperature and the outlet-end refrigerant temperature of the gas-liquid separation heat exchanger needs to be continuously obtained, under the ordinary condition, the actual superheat degree of the air conditioner condenser is lower than the maximum allowable superheat degree, and then the opening degree of a valve body for controlling the flow rate of the refrigerant is continuously reduced until the actual temperature difference reaches the target temperature difference. If the actual temperature difference reaches the target temperature difference and the actual superheat degree does not reach the maximum allowable superheat degree, the current opening degree of the valve body and the frequency of the compressor are maintained unchanged, and if the actual superheat degree is larger than or equal to the maximum allowable superheat degree and the actual temperature difference does not reach the target temperature difference, the frequency of the compressor of the air conditioner is increased until the actual temperature difference reaches the target temperature difference.
The embodiment of the application provides an air conditioner operation control method, when the heat exchange effect of a gas-liquid separation heat exchanger needs to be increased, the actual superheat degree of an air conditioner condenser is obtained, and the comparison result of the actual superheat degree and the maximum allowable superheat degree is utilized to determine whether the heat exchange effect of the gas-liquid separation heat exchanger is adjusted by reducing the opening degree of a valve body used for controlling the flow speed of a refrigerant or increasing the frequency of a compressor of the air conditioner. The heat exchange effect of the gas-liquid separation heat exchanger is ensured to be increased, the superheat degree of the condenser is ensured to be within an allowable range, the operation frequency of the compressor is within a normal operation range, and the stability of the overall operation of the air conditioner is realized.
As shown in fig. 3, fig. 3 is a schematic flow chart of a second embodiment of an air conditioner operation control method according to an embodiment of the present application.
In some embodiments of the present application, specifically, when the actual superheat degree is less than the preset maximum allowable superheat degree, the corresponding opening degree of the valve body for controlling the flow rate of the refrigerant needs to be selected according to the actual working condition of the air conditioner, specifically, the method includes steps 301 and 302:
301, if the actual superheat degree is less than the preset maximum allowable superheat degree and the air conditioner is in a refrigeration working condition, reducing the opening degree of the internal machine expansion valve.
In this application embodiment, combine the experimental data to draw, when the air conditioner was in the refrigeration operating mode, adjust the aperture of internal unit expansion valve this moment and can reduce the velocity of flow of refrigerant in the gas-liquid separation heat exchanger fast to promote heat exchange efficiency fast.
And 302, if the actual superheat degree is less than the preset maximum allowable superheat degree and the air conditioner is in a heating working condition, reducing the opening degree of the heating valve.
In the embodiment of the application, experimental data are combined to obtain that when the air conditioner is in a heating condition, the opening degree of the heating valve is adjusted to achieve a better effect of improving the heat exchange efficiency.
As shown in fig. 4, fig. 4 is a schematic flow chart of a third embodiment of an air conditioner operation control method in the embodiment of the present application.
In some embodiments of the present application, a target superheat degree is additionally set for the step of reducing the opening degree of the valve body, and different adjustment step lengths are selected to adjust the opening degree of the valve body according to a difference between the obtained actual superheat degree and the target superheat degree, specifically including steps 401 to 403:
401, judging whether the actual superheat degree is smaller than a preset target superheat degree. If the actual superheat degree is less than the preset target superheat degree, executing step 402; if the actual superheat degree is greater than or equal to the target superheat degree, step 403 is executed.
In the embodiment of the present application, considering that the adjustment principle of the heating condition and the cooling condition is similar, for convenience of description, the contents of fig. 4 and the subsequent fig. 5 and 6 are all described by taking the adjustment under the cooling condition as an example, and a person skilled in the art can derive the description of the heating condition on the basis of the explanation of the cooling condition.
In the embodiment of the present application, it should be noted that the maximum allowable superheat degree refers to the maximum superheat degree of the operation allowed by the condenser, and the target superheat degree refers to the superheat degree of the operation most stable of the condenser, and the target superheat degree is usually smaller than the maximum allowable superheat degree. Obviously, when the actual superheat degree is smaller than the preset target superheat degree, the indoor unit expansion valve can be adjusted quickly. When the actual superheat degree is higher than the preset target superheat degree, the speed of the expansion valve of the indoor unit needs to be slowed down and adjusted to avoid sudden overheating of the condenser and influence on the operation stability of the air conditioner.
In the present embodiment, the target superheat degree is also statistically obtained based on a large number of test data, and is particularly preferably set to 1 ℃.
And 402, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant according to a preset first adjusting step length.
In the embodiment of the present application, since the actual superheat degree is less than the preset target superheat degree, in general, the opening degree of the internal expansion valve may be decreased by selecting a larger step length, and specifically, preferably, the opening degree of the internal expansion valve is decreased by an operation opening degree of 5 pls/step until the actual superheat degree is greater than or equal to the target superheat degree.
And 403, reducing the opening degree of the valve body for controlling the flow rate of the refrigerant according to a preset second adjusting step length.
In the embodiment of the application, when the actual superheat degree is larger than or equal to the target superheat degree, sudden overheating of the condenser needs to be avoided, and the maximum allowable superheat degree is exceeded. In this case, the opening degree of the valve body for controlling the refrigerant flow rate may be decreased by a second adjustment step, which is set, and is normally smaller than the first adjustment step, for example, the opening degree of the internal expansion valve is decreased by an operation opening degree of 3 pls/step. Of course, as a preference, the internal expansion valve may also be adjusted by using a second adjustment step corresponding to the target temperature difference, and when the target temperature difference is larger, the second adjustment step is also larger, but the second adjustment step does not exceed the first adjustment step at most.
As shown in fig. 5, fig. 5 is a schematic flow chart of a fourth embodiment of an air conditioner operation control method according to an embodiment of the present application.
In some embodiments of the present application, a flow chart for specifically increasing the frequency of a compressor of an air conditioner is provided, which includes steps 501-503:
and 501, calculating the temperature difference between the actual temperature difference and the target temperature difference to obtain a compensation difference value.
In this application embodiment, increase the compressor frequency and can improve the difference in temperature of high-pressure refrigerant and low pressure refrigerant to improve heat transfer effect, nevertheless can increase the compressor load, increase user cost, consequently, the preferred temperature difference that adopts actual difference in temperature and target difference in temperature, also compensate the difference and adjust the compressor, avoid the compressor overload operation.
502, determining a frequency compensation coefficient corresponding to the compensation difference value according to a preset mapping relation between the difference value and the coefficient.
In the embodiment of the present application, it should be noted that, in a normal case, the frequency of the compressor determines the output capacity of the external unit, and the output capacity of the external unit is determined according to the required refrigeration capacity and the refrigeration capacity ratio of the internal unit when the output capacity of the external unit is normal, and when the required refrigeration capacity of the internal unit is constant, the frequency of the compressor needs to be adjusted by adjusting the refrigeration capacity ratio, that is, the frequency of the compressor is increased by reducing the refrigeration capacity ratio, and a corresponding conversion relationship exists between the two frequencies. Therefore, the frequency compensation coefficient provided in this step can also be understood as the cooling capacity proportioning compensation coefficient in a visual sense.
In the embodiment of the present application, in order to avoid the overload operation of the compressor, in the difference and coefficient mapping relationship, it can be known that the larger the difference is, the larger the increase amplitude of the compressor frequency can be, and when the difference is smaller, that is, the actual temperature and the target temperature difference are gradually close to each other, the increase amplitude of the compressor frequency should be controlled, and at this time, the frequency compensation coefficient should be smaller, that is, in the difference and coefficient mapping relationship, the frequency compensation coefficient of the compressor is proportional to the difference. Specifically, when the compensation difference is between 0 ℃ and 1 ℃, the corresponding frequency compensation coefficient is 1%, when the compensation interpolation is between 1 ℃ and 3 ℃, the corresponding frequency compensation coefficient is 2%, and when the compensation interpolation is higher than 3 ℃, the corresponding frequency compensation coefficient is 3%.
And 503, increasing the frequency of the air conditioner compressor according to the frequency compensation coefficient.
In the embodiment of the present application, specifically, the current operating frequency of the air conditioner compressor is obtained, then the frequency compensation coefficient is added to obtain the operating frequency of the air conditioner compressor after compensation, and then the operating frequency of the compressor is adjusted based on the frequency conversion technology.
As shown in fig. 6, fig. 6 is a schematic flow chart of a fifth embodiment of an air conditioner operation control method according to an embodiment of the present application.
In some embodiments of the present application, a flowchart specifically setting a target temperature according to a cold quantity ratio and an external environment temperature is provided, and specifically includes steps 601 to 602:
601, acquiring the current cold quantity ratio and the current external environment temperature of the air conditioner.
In the embodiment of the present application, specifically, the target temperature is determined based on the current cooling capacity ratio of the air conditioner and the current external environment temperature, where the cooling capacity ratio is the same as the cooling capacity ratio mentioned in the foregoing step 502, and can be simply understood as a ratio of the demand capacity of the internal unit to the output capacity of the external unit, and the ratio is usually a settable value and is used for regulating and controlling the frequency of the compressor.
And 602, querying a preset matching temperature and temperature difference mapping relation table to obtain a mapping temperature corresponding to the current cold matching and the current external environment temperature, and determining the mapping temperature as a target temperature difference.
In the embodiment of the present application, the preset mapping table of the mixture temperature and the temperature difference refers to a correspondence between the temperature difference at two ends of the heat exchanger and the mixture ratio of the external environment temperature and the cooling capacity, which is determined based on experiments in advance, and the optimal temperature under different external environment temperatures and different cooling capacities, that is, the temperature difference at two ends of the heat exchanger when there is no phenomenon of large throttling sound of the internal machine or liquid return of the compressor, and the step of specifically obtaining the mapping table of the mixture temperature and the temperature difference may refer to fig. 7 and the content of the explanation thereof.
In the preferred embodiment of the present invention, a better mapping table of the proportioning temperature and the temperature difference is determined based on experiments, which is specifically as follows:
if the refrigerator is in a refrigerating state, the mapping relation between the ambient temperature, the cold quantity ratio and the target temperature difference is as follows:
Figure BDA0003074060650000111
Figure BDA0003074060650000121
when the heating device is in a heating state, the mapping relation between the ambient temperature, the cold quantity ratio and the target temperature difference is as follows:
Figure BDA0003074060650000122
as shown in fig. 7, fig. 7 is a schematic flow chart of a sixth embodiment of an air conditioner operation control method according to an embodiment of the present application.
In some embodiments of the present application, a flow chart of steps for constructing a mapping table of mixture temperature and temperature difference is provided, which specifically includes steps 701 to 705:
701, obtaining the test temperature and the test pressure of the high-pressure side of the air conditioner under the conditions of testing the external environment temperature and testing the cold quantity ratio.
In the embodiment of the application, the test temperature and the test pressure of the high-pressure side of the air conditioner are respectively collected under different test external environment temperatures and different test cold quantity ratios, so that the stable operation of the air conditioner is tested. Specifically, it can be understood that if the test pressure on the high-pressure side of the air conditioner is equal to the saturated vapor pressure of the test temperature, it indicates that the refrigerant in the air conditioner is in a saturated two-phase state at the time, if the refrigerant in the saturated two-phase state flows into the indoor unit, the throttling sound of the indoor unit is too large, and when the refrigerant in the saturated two-phase state flows into the compressor, the liquid return of the compressor is caused, that is, it can be determined through the test temperature and the test pressure whether the air conditioner has the problem that the throttling sound of the indoor unit is too large or the liquid return of the compressor is caused due to insufficient heat exchange efficiency.
And 702, judging whether the test pressure of the high-pressure side of the air conditioner is smaller than the saturated vapor pressure of the test temperature. If the test pressure is less than the saturated vapor pressure of the test temperature, performing step 703; if the test pressure is greater than or equal to the saturated vapor pressure of the test temperature, other steps are performed.
In the embodiment of the application, whether the test pressure at the high-pressure side is smaller than the saturated vapor pressure of the test temperature is specifically judged, if the test pressure is smaller than the saturated vapor pressure of the test temperature, the refrigerant in the air conditioner is in a normal state, and if the test pressure is greater than or equal to the saturated vapor pressure of the test temperature, the refrigerant is in a two-phase state, and at this time, the air conditioner cannot stably and normally operate.
703, obtaining the temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger.
In this application embodiment, when the air conditioner was in normal operating condition, obtain the test difference in temperature of gas-liquid separation heat exchanger's entry end refrigerant temperature and exit end refrigerant temperature for the heat exchange efficiency that needs the needs that gas-liquid separation heat exchanger needs to satisfy is that what needs the difference in temperature of gas-liquid separation heat exchanger's entry end refrigerant temperature and exit end refrigerant temperature to reach promptly, just can guarantee the normal operating of air conditioner.
And 704, calculating the average value of the test temperature difference, and determining the average value as the optimal temperature difference under the test external environment temperature and the test cold quantity ratio.
In the embodiment of the application, a more accurate result is obtained by calculating a plurality of groups of experiments and calculating the average value of the test temperature difference, and the average value is the heat exchange effect required by the gas-liquid separation heat exchanger when the air conditioner normally operates under the conditions of testing the external environment temperature and testing the cold quantity ratio.
705, the optimal temperature difference, the test external environment temperature and the test cold quantity are matched and written into a mapping relation table of matching temperature and temperature difference.
In the embodiment of the application, the temperature difference, the ambient temperature and the cold quantity ratio are written into the ratio temperature and temperature difference mapping relation table, and then the corresponding optimal temperature difference, namely the target temperature difference, can be directly obtained according to the ambient temperature and the cold quantity ratio.
As shown in fig. 8, fig. 8 is a flowchart illustrating a seventh embodiment of an operation control method of an air conditioner according to an embodiment of the present application.
In some embodiments of the present application, an implementation scheme is provided for conveniently adjusting the opening of a valve body of an air conditioner and the frequency of a compressor, and specifically includes steps 801-802:
and 801, if the actual temperature difference is equal to a preset target temperature difference, acquiring the current external environment temperature, the current cold quantity ratio, the current opening of a valve body for controlling the flow rate of the refrigerant and the current operating frequency of the compressor of the air conditioner.
In the embodiment of the application, in order to realize the operation control of the air conditioner, when the actual temperature difference is adjusted to reach the preset target temperature difference, the opening of the valve body and the operation frequency of the compressor under the external environment temperature and cold quantity matching are recorded, and the proper opening of the valve body and the operation frequency of the compressor can be directly determined subsequently according to the external environment temperature and cold quantity matching.
As a preferred embodiment of the present application, specifically, the data may be recorded only after the actual temperature difference is equal to the preset target temperature difference and exceeds the preset time period.
And 802, establishing a corresponding relation among the current external environment temperature, the current cold quantity ratio, the current opening and the current operation frequency, and writing the corresponding relation into an operation control database.
In this embodiment, the corresponding relationship between the external environment temperature, the current cold quantity ratio, the current opening degree and the compressor operation frequency is written into the operation control database, so that subsequent control can be facilitated, and the corresponding relationship can be continuously updated in the process, so that a better control effect can be achieved.
As shown in fig. 9, fig. 9 is a functional block diagram of an air conditioner operation control device according to an embodiment of the present application.
In order to better implement the air conditioner operation control method in the embodiment of the present application, on the basis of the air conditioner operation control method, an embodiment of the present application further provides an air conditioner operation control device, where the air conditioner operation control device includes:
an actual temperature difference calculation module 901, configured to obtain an inlet-end refrigerant temperature and an outlet-end refrigerant temperature of the gas-liquid separation heat exchanger, and calculate an actual temperature difference between the inlet-end refrigerant temperature and the outlet-end refrigerant temperature;
an actual superheat degree obtaining module 902, configured to obtain an actual superheat degree of the air-conditioning condenser if the actual temperature difference is smaller than a preset target temperature difference;
the valve body opening control module 903 is used for reducing the opening of the valve body for controlling the flow rate of the refrigerant if the actual superheat degree is smaller than the preset maximum allowable superheat degree;
and the compressor frequency control module 904 is used for increasing the frequency of the compressor of the air conditioner if the actual superheat degree is greater than or equal to the preset maximum allowable superheat degree.
In some embodiments of the present application, the valve opening control module 903 includes:
if the actual superheat degree is smaller than the preset maximum allowable superheat degree and the air conditioner is in a refrigeration working condition, reducing the opening degree of an expansion valve of the internal machine;
and if the actual superheat degree is less than the preset maximum allowable superheat degree and the air conditioner is in a heating working condition, reducing the opening degree of the heating valve.
In some embodiments of the present application, the reducing the opening of the valve body for controlling the flow rate of the refrigerant includes:
judging whether the actual superheat degree is smaller than a preset target superheat degree or not;
if the actual superheat degree is smaller than the target superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant according to a preset first adjusting step length;
and if the actual superheat degree is larger than or equal to the target superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant according to a preset second adjusting step length.
In some embodiments of the present application, the increasing the frequency of the air conditioner compressor includes:
calculating the temperature difference between the actual temperature difference and the target temperature difference to obtain a compensation difference value;
determining a frequency compensation coefficient corresponding to the compensation difference value according to a preset mapping relation between the difference value and the coefficient;
and increasing the frequency of the compressor of the air conditioner according to the frequency compensation coefficient.
In some embodiments of the present application, before obtaining the actual superheat of the condenser of the air conditioner if the actual temperature difference is smaller than the preset target temperature difference, the method includes:
acquiring the current cold quantity ratio and the current external environment temperature of the air conditioner;
and inquiring a preset ratio temperature and temperature difference mapping relation table to obtain a mapping temperature corresponding to the current cold quantity ratio and the current external environment temperature, and determining the mapping temperature as a target temperature difference.
In some embodiments of the present application, before querying a preset mapping relationship table between matching temperature and temperature difference to obtain a mapping temperature corresponding to the current cold quantity matching ratio and the current external environment temperature, the method includes:
acquiring the test temperature and the test pressure of the high-pressure side of the air conditioner under the conditions of testing the external environment temperature and testing the cold quantity ratio;
if the test pressure of the high-pressure side of the air conditioner is smaller than the saturated vapor pressure of the test temperature, obtaining the test temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger;
calculating the average value of the test temperature difference, and determining the average value as the optimal temperature difference under the test external environment temperature and the test cold quantity ratio;
and writing the optimal temperature difference, the test external environment temperature and the test cold quantity into a matching temperature and temperature difference mapping relation table.
In some embodiments of the present application, after obtaining an inlet-end refrigerant temperature and an outlet-end refrigerant temperature of the gas-liquid separation heat exchanger and calculating an actual temperature difference between the inlet-end refrigerant temperature and the outlet-end refrigerant temperature, the method includes:
if the actual temperature difference is equal to a preset target temperature difference, acquiring the current external environment temperature, the current cold quantity ratio, the current opening of a valve body for controlling the flow rate of a refrigerant and the current operating frequency of an air conditioner compressor;
and establishing a corresponding relation among the current external environment temperature, the current cold quantity ratio, the current opening and the current operation frequency, and writing the corresponding relation into an operation control database.
The embodiment of the application provides an air conditioner operation control device, when needs increase gas-liquid separation heat exchanger's heat transfer effect, through the actual superheat degree that obtains air conditioner condenser to utilize the comparison result of actual superheat degree and maximum allowable superheat degree, confirm whether adjust gas-liquid separation heat exchanger's heat transfer effect through the aperture that reduces the valve body that is used for controlling the refrigerant velocity of flow or through the frequency that increases the air conditioner compressor. The heat exchange effect of the gas-liquid separation heat exchanger is ensured to be increased, the superheat degree of the condenser is ensured to be within an allowable range, the operation frequency of the compressor is within a normal operation range, and the stability of the overall operation of the air conditioner is realized.
As shown in fig. 10, fig. 10 is a schematic structural diagram of an operation control device of an air conditioner in an embodiment of the present application.
In an embodiment of the present application, the air conditioner operation control device includes:
one or more processors;
a memory; and
one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor for performing the steps of the air conditioner operation control method in any of the above embodiments of the air conditioner operation control method.
Specifically, the method comprises the following steps: the air conditioner operation control device may include components such as a processor 1001 of one or more processing cores, a memory 1002 of one or more computer storage media, a power source 1003, and an input unit 1004. Those skilled in the art will appreciate that the air conditioner operation control device configuration shown in fig. 10 does not constitute a limitation of the air conditioner operation control device, and may include more or less components than those shown, or combine some components, or a different arrangement of components. Wherein:
the processor 1001 is a control center of the air conditioner operation control, connects various parts of the entire air conditioner operation control by using various interfaces and lines, and performs various functions of the air conditioner operation control apparatus and processes data by operating or executing software programs and/or modules stored in the memory 1002 and calling data stored in the memory 1002, thereby performing overall monitoring of the air conditioner operation control apparatus. Optionally, processor 1001 may include one or more processing cores; preferably, the processor 1001 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 1001.
The memory 1002 may be used to store software programs and modules, and the processor 1001 executes various functional applications and data processing by operating the software programs and modules stored in the memory 1002. The memory 1002 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data created according to use of the air conditioner operation control device, and the like. Further, the memory 1002 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 1002 may also include a memory controller to provide the processor 1001 access to the memory 1002.
The air conditioner operation control device further includes a power source 1003 for supplying power to each component, and preferably, the power source 1003 may be logically connected to the processor 1001 through a power management system, so that functions of managing charging, discharging, power consumption management, and the like are implemented through the power management system. The power source 1003 may also include any component including one or more of a dc or ac power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
The air conditioner operation control apparatus may further include an input unit 1004, and the input unit 1004 may be used to receive input numeric or character information and generate a keyboard, mouse, joystick, optical or trackball signal input in connection with user setting and function control.
Although not shown, the air conditioner operation control device may further include a display unit and the like, which will not be described herein. Specifically, in this embodiment, the processor 1001 in the air conditioner operation control device loads an executable file corresponding to a process of one or more application programs into the memory 1002 according to the following instructions, and the processor 1001 runs the application programs stored in the memory 1002, so as to implement various functions as follows:
acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
if the actual temperature difference is smaller than the preset target temperature difference, acquiring the actual superheat degree of the air conditioner condenser;
if the actual superheat degree is smaller than the preset maximum allowable superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant;
and if the actual superheat degree is larger than or equal to the preset maximum allowable superheat degree, increasing the frequency of the compressor of the air conditioner.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer storage medium and loaded and executed by a processor.
To this end, an embodiment of the present invention provides a computer storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like. The air conditioner running control method comprises a step of storing a computer program, and a step of executing the steps in any one of the air conditioner running control methods provided by the embodiments of the invention by loading the computer program by a processor. For example, the computer program may be loaded by a processor to perform the steps of:
acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
if the actual temperature difference is smaller than the preset target temperature difference, acquiring the actual superheat degree of the air conditioner condenser;
if the actual superheat degree is smaller than the preset maximum allowable superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant;
and if the actual superheat degree is larger than or equal to the preset maximum allowable superheat degree, increasing the frequency of the compressor of the air conditioner.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.
The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
The above detailed description is provided for the operation control method of the air conditioner provided in the embodiment of the present application, and the principle and the implementation manner of the present invention are explained in the present application by applying a specific example, and the description of the above embodiment is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. An operation control method of an air conditioner, comprising:
acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
if the actual temperature difference is smaller than the preset target temperature difference, acquiring the actual superheat degree of the air conditioner condenser;
if the actual superheat degree is smaller than the preset maximum allowable superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant;
and if the actual superheat degree is larger than or equal to the preset maximum allowable superheat degree, increasing the frequency of the compressor of the air conditioner.
2. The operation control method of an air conditioner according to claim 1, wherein the reducing the opening degree of the valve body for controlling the flow rate of the refrigerant if the actual superheat degree is less than a preset maximum allowable superheat degree comprises:
if the actual superheat degree is smaller than the preset maximum allowable superheat degree and the air conditioner is in a refrigeration working condition, reducing the opening degree of an expansion valve of the internal machine;
and if the actual superheat degree is less than the preset maximum allowable superheat degree and the air conditioner is in a heating working condition, reducing the opening degree of the heating valve.
3. The operation control method of an air conditioner according to claim 1, wherein the reducing of the opening degree of the valve body for controlling the flow rate of the refrigerant comprises:
judging whether the actual superheat degree is smaller than a preset target superheat degree or not;
if the actual superheat degree is smaller than the target superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant according to a preset first adjusting step length;
and if the actual superheat degree is larger than or equal to the target superheat degree, reducing the opening degree of a valve body for controlling the flow rate of the refrigerant according to a preset second adjusting step length.
4. The air conditioner operation control method as claimed in claim 1, wherein the increasing the frequency of the air conditioner compressor comprises:
calculating the temperature difference between the actual temperature difference and the target temperature difference to obtain a compensation difference value;
determining a frequency compensation coefficient corresponding to the compensation difference value according to a preset mapping relation between the difference value and the coefficient;
and increasing the frequency of the compressor of the air conditioner according to the frequency compensation coefficient.
5. The air conditioner operation control method as claimed in claim 1, wherein before obtaining the actual superheat degree of the air conditioner condenser if the actual temperature difference is less than a preset target temperature difference, the method comprises:
acquiring the current cold quantity ratio and the current external environment temperature of the air conditioner;
and inquiring a preset ratio temperature and temperature difference mapping relation table to obtain a mapping temperature corresponding to the current cold quantity ratio and the current external environment temperature, and determining the mapping temperature as a target temperature difference.
6. The method for controlling the operation of an air conditioner according to claim 5, wherein before the step of searching a preset matching temperature-temperature difference mapping relation table to obtain the mapping temperature corresponding to the current cooling capacity matching and the current external environment temperature, the method comprises the following steps:
acquiring the test temperature and the test pressure of the high-pressure side of the air conditioner under the conditions of testing the external environment temperature and testing the cold quantity ratio;
if the test pressure of the high-pressure side of the air conditioner is smaller than the saturated vapor pressure of the test temperature, obtaining the test temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger;
calculating the average value of the test temperature difference, and determining the average value as the optimal temperature difference under the test external environment temperature and the test cold quantity ratio;
and writing the optimal temperature difference, the test external environment temperature and the test cold quantity into a matching temperature and temperature difference mapping relation table.
7. The method of claim 1, wherein the obtaining an inlet-end refrigerant temperature and an outlet-end refrigerant temperature of the gas-liquid separation heat exchanger, and calculating an actual temperature difference between the inlet-end refrigerant temperature and the outlet-end refrigerant temperature comprises:
if the actual temperature difference is equal to a preset target temperature difference, acquiring the current external environment temperature, the current cold quantity ratio, the current opening of a valve body for controlling the flow rate of a refrigerant and the current operating frequency of an air conditioner compressor;
and establishing a corresponding relation among the current external environment temperature, the current cold quantity ratio, the current opening and the current operation frequency, and writing the corresponding relation into an operation control database.
8. An operation control device of an air conditioner, comprising:
the actual temperature difference calculation module is used for acquiring the inlet end refrigerant temperature and the outlet end refrigerant temperature of the gas-liquid separation heat exchanger and calculating the actual temperature difference between the inlet end refrigerant temperature and the outlet end refrigerant temperature;
the actual superheat degree acquisition module is used for acquiring the actual superheat degree of the air conditioner condenser if the actual temperature difference is smaller than a preset target temperature difference;
the valve body opening control module is used for reducing the opening of a valve body for controlling the flow rate of the refrigerant if the actual superheat degree is less than the preset maximum allowable superheat degree;
and the compressor frequency control module is used for increasing the frequency of the compressor of the air conditioner if the actual superheat degree is greater than or equal to the preset maximum allowable superheat degree.
9. An air conditioner is characterized by comprising a compressor, an inner machine, an outer machine, a gas-liquid separation heat exchanger for realizing the heat exchange of refrigerants at the high pressure side and the low pressure side of the air conditioner, and
one or more processors;
a memory; and
one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the air conditioner operation control method of any one of claims 1 to 7.
10. A computer storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the air conditioner operation control method according to any one of claims 1 to 7.
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