CN108731224B - Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system - Google Patents

Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system Download PDF

Info

Publication number
CN108731224B
CN108731224B CN201811015686.6A CN201811015686A CN108731224B CN 108731224 B CN108731224 B CN 108731224B CN 201811015686 A CN201811015686 A CN 201811015686A CN 108731224 B CN108731224 B CN 108731224B
Authority
CN
China
Prior art keywords
temperature
heat exchanger
expansion valve
electronic expansion
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811015686.6A
Other languages
Chinese (zh)
Other versions
CN108731224A (en
Inventor
吴杨杨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201811015686.6A priority Critical patent/CN108731224B/en
Publication of CN108731224A publication Critical patent/CN108731224A/en
Application granted granted Critical
Publication of CN108731224B publication Critical patent/CN108731224B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature

Abstract

The application provides a fixed-frequency air conditioning system, a control method and a control device of the fixed-frequency air conditioning system, electronic equipment and a storage medium, wherein the method comprises the following steps: when the air conditioner operates in a refrigeration mode, the air inlet temperature of the indoor heat exchanger is detected; acquiring a temperature difference value between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system; and adjusting the opening degree of the electronic expansion valve according to the temperature difference, and controlling the opening or closing of the compressor. According to the method, the quantity of the refrigerant entering the indoor heat exchanger is adjusted through the electronic expansion valve, the purpose of accurately controlling the indoor temperature is achieved, the indoor temperature is maintained to be stable near the set temperature, the comfort of a user is improved, and the frequent starting and stopping of the compressor are avoided.

Description

Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system
Technical Field
The present disclosure relates to the field of electrical appliance control technologies, and in particular, to a fixed-frequency air conditioning system, a method and an apparatus for controlling the same, an electronic device, and a storage medium.
Background
With the increase of the popularity of air conditioners, people more widely use air conditioners to adjust the temperature of the indoor environment in life so as to meet the cold and hot requirements of users.
In the related art, for the refrigeration control of the fixed-frequency air conditioner, a method of stopping the air conditioner at a temperature is generally adopted, that is, in a refrigeration state of the air conditioner, when the room temperature is lower than the set temperature of the air conditioner and reaches a preset value, the compressor stops working, the air conditioner stops refrigerating, and when the room temperature is higher than the set temperature of the air conditioner and reaches the preset value, the compressor starts working, and the air conditioner continues refrigerating. The indoor ambient temperature is regulated by controlling the start and stop of the compressor.
However, the applicant finds that when the air conditioner is controlled by a compressor starting and stopping method, the indoor temperature fluctuation is large, the comfort of users is reduced due to sudden cold and heat in the environment, and meanwhile, the service life of the air conditioner is shortened and the waste of power resources is caused due to frequent starting and stopping of the compressor.
Disclosure of Invention
The application provides a fixed-frequency air conditioning system, a control method and a control device of the fixed-frequency air conditioning system, electronic equipment and a storage medium, the method adjusts the opening degree value of the electronic expansion valve according to the difference value of the inlet air temperature and the set temperature of the indoor heat exchanger so as to control the amount of the refrigerant entering the indoor heat exchanger, when the temperature difference is large, the refrigeration demand of the user to the air conditioner is large, the work load of the air conditioner is large, the electronic expansion valve is closed, the refrigerant flows into the indoor heat exchanger completely to reduce the indoor temperature rapidly, when the temperature difference is small, the opening value of the electronic expansion valve is adjusted according to the interval of the temperature difference value, so that a corresponding amount of refrigerant flows into the indoor heat exchanger, therefore, the indoor temperature is accurately controlled according to the refrigeration requirement of a user, the indoor temperature is maintained to be stable near the set temperature, the comfort of the user is improved, and the resource waste caused by frequent starting and stopping of the compressor is avoided.
An embodiment of a first aspect of the present application provides a control method for a fixed-frequency air conditioning system, including:
when the air conditioner operates in a refrigeration mode, the air inlet temperature of the indoor heat exchanger is detected;
acquiring a temperature difference value between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system;
and adjusting the opening degree of the electronic expansion valve according to the temperature difference, and controlling the opening or closing of the compressor.
An embodiment of another aspect of the present application provides a control device for a fixed-frequency air conditioning system, including:
the acquisition module is used for detecting the air inlet temperature of the indoor heat exchanger when the indoor heat exchanger operates in a refrigeration mode;
the acquisition module is used for acquiring a temperature difference value between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system;
and the control module is used for adjusting the opening of the electronic expansion valve according to the temperature difference value and controlling the opening or closing of the compressor.
In another aspect, an embodiment of the present application provides a fixed-frequency air conditioning system, including a loop composed of a compressor, an outdoor heat exchanger, a throttling element, an electronic expansion valve, and an indoor heat exchanger; the first end of the electronic expansion valve is connected into a first pipeline between the compressor and the outdoor heat exchanger, the second end of the electronic expansion valve is connected into a second pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the third end of the electronic expansion valve is directly connected into the indoor heat exchanger, and the control device of the fixed-frequency air conditioning system is provided with the embodiment.
In another embodiment of the present application, an electronic device is provided, which includes a processor and a memory, where the processor executes a program corresponding to an executable program code by reading the executable program code stored in the memory, so as to implement the control method of the fixed-frequency air conditioning system according to the foregoing embodiment.
Another embodiment of the present application provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing a control method of a fixed-frequency air conditioning system as described in an embodiment of the above aspect.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. and adjusting the opening degree of the electronic expansion valve according to the temperature difference, and controlling the opening or closing of the compressor. The opening value of the electronic expansion valve is adjusted according to the temperature difference value to control the amount of the refrigerant entering the indoor heat exchanger, so that the indoor temperature is accurately controlled according to the refrigeration requirement of a user, the purpose that the indoor temperature is kept stable near the set temperature is achieved, the comfort of the user is improved, and the resource waste caused by frequent starting and stopping of the compressor is avoided.
2. When the compressor stops running, the temperature difference value between the inlet air temperature and the set temperature is continuously acquired, when the temperature difference value is larger than a fourth temperature threshold value, the duration time that the temperature difference value is larger than the fourth temperature threshold value is counted, and if the duration time reaches a preset duration time threshold value, the compressor is restarted. The compressor is restarted when the indoor temperature meets the compressor starting condition to meet the refrigeration requirement of a user, and meanwhile, the compressor is started after the preset time length to avoid frequent starting and stopping of the compressor and reduce the service life of the air conditioner.
3. The first end of the electronic expansion valve is connected to the first pipeline between the compressor and the outdoor heat exchanger, and the refrigerant can flow to the condenser input pipe of the outdoor heat exchanger through the electronic expansion valve. When the temperature difference between the inlet air temperature and the set temperature is small, in order to avoid that the indoor temperature is too low, the opening degree of the electronic expansion valve is increased, and redundant refrigerants flow to the condenser input pipe of the outdoor heat exchanger, so that the running load of the outdoor heat exchanger is reduced, and meanwhile, the electric energy can be saved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a fixed-frequency air conditioning system according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a control method of a fixed-frequency air conditioning system according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a control method of a specific fixed-frequency air conditioning system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an adjusting device of an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a fixed-frequency air conditioning system according to an embodiment of the present disclosure; and
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The embodiment of the application mainly aims at the related technology, for the refrigeration control of a fixed-frequency air conditioner, when a method of stopping the air conditioner at a temperature is adopted, namely, under the refrigeration state of the air conditioner, when the room temperature is lower than the set temperature of the air conditioner and reaches a preset value, the compressor stops working, the air conditioner stops refrigerating, when the room temperature is higher than the set temperature of the air conditioner and reaches the preset value, the compressor starts working, when the air conditioner continues refrigerating, the fluctuation of the indoor temperature is large, the environment is suddenly cooled and suddenly heated, and the user experience is influenced, or, when the compressor with double compression cavities is adopted, the refrigerant quantity is adjusted by controlling the opening of the compression cavities of the compressor, the implementation cost is high, and the technical problem that the control steps are complicated is caused by controlling the working.
The control method of the fixed-frequency air conditioning system comprises the steps of adjusting the opening degree value of the electronic expansion valve according to the difference value of the inlet air temperature and the set temperature of the indoor heat exchanger to control the quantity of refrigerants entering the indoor heat exchanger, when the temperature difference value is large, the refrigeration requirement of a user on the air conditioner is large, the working load of the air conditioner is large, the electronic expansion valve is closed, all refrigerants flow into the indoor heat exchanger to rapidly reduce the indoor temperature, when the temperature difference value is small, the opening degree value of the electronic expansion valve is adjusted according to the interval where the temperature difference value is located, the corresponding quantity of refrigerants flow into the indoor heat exchanger, the indoor temperature is accurately controlled according to the refrigeration requirement of the user, the indoor temperature is maintained to be stable near the set temperature, the comfort of the user is improved, and resource waste caused by frequent starting and.
The following describes a fixed-frequency air conditioning system, a control method and device for the fixed-frequency air conditioning system, and an electronic device according to an embodiment of the present application with reference to the drawings.
The control method of the fixed-frequency air conditioning system according to the embodiment of the present application may be executed by the control device of the fixed-frequency air conditioning system according to the embodiment of the present application, and the control device of the fixed-frequency air conditioning system may be configured in the fixed-frequency air conditioning system to implement control of the fixed-frequency air conditioning system.
As shown in fig. 1, the constant-frequency air conditioning system includes a loop composed of a compressor 10, an outdoor heat exchanger 20, a throttling element 30, an electronic expansion valve 40, and an indoor heat exchanger 50, wherein a first end of the electronic expansion valve 40 is connected to a first pipeline between the compressor 10 and the outdoor heat exchanger 20, a second end is connected to a second pipeline between the outdoor heat exchanger 20 and the indoor heat exchanger 50, and a third end is directly connected to the indoor heat exchanger 50. As an example, the electronic expansion valve 40 may be a thermal expansion valve, and the control device of the fixed-frequency air conditioning system may adjust an opening value of the thermal expansion valve to control a flow rate of the refrigerant passing through the thermal expansion valve. As another example, the throttling element may be a capillary tube, which is a device for adjusting the flow rate of the refrigerant in the constant-frequency air conditioning system, and the refrigerant may be cooled and decompressed so as to absorb and emit heat.
Fig. 2 is a schematic flowchart of a control method of a fixed-frequency air conditioning system according to an embodiment of the present application.
As shown in fig. 2, the control method of the constant-frequency air conditioning system includes the following steps:
and 101, detecting the inlet air temperature of the indoor heat exchanger when the indoor heat exchanger operates in the refrigeration mode.
Specifically, when the user controlled air conditioner was operated under the mode of refrigeration, the temperature sensor on the indoor heat exchanger air intake position detected the air inlet temperature of indoor heat exchanger to send the air inlet temperature of the indoor heat exchanger who gathers for fixed frequency air conditioning system's controlling means, wherein, because the air inlet temperature of indoor heat exchanger is the temperature that the indoor air that detects flowed into indoor heat exchanger, the air inlet temperature is comparatively close with indoor ambient temperature, can reflect indoor ambient temperature through the air inlet temperature. Further, in order to improve the accuracy of detecting the intake air temperature of the indoor heat exchanger, as a possible implementation manner, temperature sensors may be disposed at different positions of an air inlet of the indoor heat exchanger, and an average value of data collected by the temperature sensors is taken as the intake air temperature of the indoor heat exchanger, or a temperature with the highest frequency of occurrence in the data is taken as the intake air temperature of the indoor heat exchanger.
Step 102, obtaining a temperature difference value between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system.
Specifically, the control device of the fixed-frequency air conditioning system makes a difference between the detected inlet air temperature of the indoor heat exchanger and the set temperature of the air conditioner, so as to obtain a temperature difference value between the inlet air temperature of the indoor heat exchanger and the set temperature of the fixed-frequency air conditioning system. The temperature difference between the inlet air temperature and the set temperature can reflect the matching condition between the refrigerating capacity output by the air conditioner and the indoor required refrigerating capacity.
It can be understood, if the air inlet temperature is greater than the settlement temperature, when the difference between air inlet temperature and the settlement temperature is great, the refrigerating capacity of air conditioner is far less than indoor required refrigerating capacity, indoor temperature is higher, so the user is great to the refrigerating capacity demand of air conditioner, the air conditioner is great to indoor refrigerated work load, when the difference between air inlet temperature and the settlement temperature is less, the refrigerating capacity of air conditioner output and indoor required refrigerating capacity are comparatively matchd, the user is less to the refrigerating capacity demand of air conditioner, the air conditioner can be with lower work load to indoor refrigeration.
For example, when the set temperature of the air conditioner is 24 ℃, if the inlet air temperature is 28 ℃, the temperature difference is 4 ℃, which indicates that the indoor temperature is high and the user feels hot, and further the demand on the cooling capacity of the air conditioner is high, and if the inlet air temperature is 25 ℃, the temperature difference is 1 ℃, which indicates that the indoor temperature is close to the set temperature of the user, and the cooling capacity of the air conditioner basically meets the required cooling capacity of the indoor, so that the demand on the further cooling of the air conditioner by the user is low.
If the inlet air temperature is lower than the set temperature, the difference value between the inlet air temperature and the set temperature is a negative value, when the difference value between the inlet air temperature and the set temperature is smaller, the refrigerating capacity of the air conditioner is larger than the indoor required refrigerating capacity, the indoor temperature is lower, the refrigerating capacity of the air conditioner needs to be greatly reduced for a user, when the difference value between the inlet air temperature and the set temperature is larger, the refrigerating capacity output by the air conditioner is matched with the indoor required refrigerating capacity, and the user can properly reduce the refrigerating capacity of the air conditioner or keep the current refrigerating capacity. For example, when the set temperature of the air conditioner is 26 ℃, if the inlet air temperature is 23 ℃, the temperature difference is-3 ℃, the current refrigerating capacity of the air conditioner is greater than the refrigerating capacity required by the user, and the refrigerating capacity of the air conditioner needs to be reduced by the user; if the temperature of the inlet air is 25.5 ℃, the temperature difference is-0.5 ℃, which shows that the refrigerating capacity output by the air conditioner is matched with the indoor required refrigerating capacity.
Therefore, the temperature difference between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system is obtained, and the fixed-frequency air conditioning system is convenient to control according to the temperature difference.
And 103, adjusting the opening of the electronic expansion valve according to the temperature difference, and controlling the opening or closing of the compressor.
Specifically, as can be seen from fig. 1, after entering the outdoor heat exchanger through the compressor for cooling, the refrigerant enters the throttling element and is divided into two paths for circulation, wherein one path directly enters the indoor heat exchanger for cooling indoors, and the other path enters the electronic expansion valve through the second pipeline, and then the amount of the refrigerant flowing to the indoor heat exchanger or flowing to the condenser input pipe of the outdoor heat exchanger through the first pipeline can be controlled according to the opening degree of the electronic expansion valve. In step 102, it can be determined whether the cooling capacity output by the air conditioner meets the indoor cooling requirement according to the temperature difference, so that the indoor environment temperature can be adjusted according to the temperature difference. Specifically, the opening degree of the electronic expansion valve can be determined according to the temperature difference value so as to control the amount of refrigerant entering the indoor heat exchanger, control the start-stop state of the compressor and realize accurate control of the indoor environment temperature. Meanwhile, redundant refrigerant flows to the condenser input pipe of the outdoor heat exchanger, so that the running load of the outdoor heat exchanger is reduced, and meanwhile, electric energy can be saved.
In the embodiment of the invention, the opening value of the electronic expansion valve is adjusted according to the difference value between the inlet air temperature of the indoor heat exchanger and the set temperature so as to control the amount of the refrigerant entering the indoor heat exchanger, thereby accurately controlling the indoor temperature, maintaining the indoor temperature to be stable near the set temperature, improving the comfort of users and avoiding the resource waste caused by frequent starting and stopping of the compressor.
In order to more clearly describe a specific process of adjusting the opening degree of the electronic expansion valve according to the temperature difference, the present application provides a specific control method of the fixed-frequency air conditioning system, and fig. 3 is a flowchart of the specific control method of the fixed-frequency air conditioning system provided in the embodiment of the present application. As shown in fig. 3, the method includes:
step 201, comparing the temperature difference value with a temperature interval composed of a preset temperature threshold value, and determining a target temperature interval in which the temperature difference value is located.
Specifically, the mismatching degree between the required refrigerating capacity under different temperature difference values and the refrigerating capacity output by the air conditioner can be determined in advance through a large number of experiments, a plurality of temperature threshold values can be selected from the plurality of temperature difference values according to the mismatching degree, and the selected temperature threshold values are utilized to form each temperature interval.
For example, when the temperature difference is within 1 ℃, the mismatching degree between the refrigerating capacity output by the air conditioner and the required refrigerating capacity is small, which indicates that the refrigerating capacity output by the air conditioner basically meets the refrigerating requirement of the user on the air conditioner, and at this time, the refrigerating requirement of the user on the air conditioner is small. When the temperature difference is between 1 ℃ and 2 ℃, the mismatching degree between the refrigerating capacity output by the air conditioner and the required refrigerating capacity is moderate, which indicates that the refrigerating capacity output by the air conditioner can not meet the refrigerating demand of the user on the air conditioner, but the difference is small, and the refrigerating demand of the user on the air conditioner is small at the moment. When the temperature difference exceeds 2 ℃, the mismatching degree between the refrigerating capacity output by the air conditioner and the required refrigerating capacity is large, which shows that the refrigerating capacity output by the air conditioner can not meet the refrigerating demand of the user on the air conditioner to a great extent, and the difference is large, so that the refrigerating demand of the user on the air conditioner is large at the moment.
In this example, three temperature intervals smaller than 1 ℃, 1 ℃ to 2 ℃ and larger than 2 ℃ may be formed by using the preset temperature thresholds of 1 ℃ and 2 ℃, and the temperature difference value may be compared with the temperature thresholds of the three temperature intervals to determine a target temperature interval where the temperature difference value is located, so as to determine the refrigeration requirement of the user.
Step 202, determining a target opening degree of the electronic expansion valve according to the target temperature interval, adjusting the opening degree of the electronic expansion valve according to the target opening degree, and controlling the opening or closing of the compressor.
Specifically, according to the refrigeration requirements of users in different temperature intervals, the mapping relation between each temperature interval and the opening degree value of the electronic expansion valve is preset, the target opening degree of the corresponding electronic expansion valve is matched according to the target temperature interval where the determined temperature difference value is located, when the temperature difference value is large, the opening degree of the electronic expansion valve is small or closed, so that a large amount of refrigerants enter the indoor heat exchanger, and when the temperature difference value is small, the opening degree of the electronic expansion valve is large, so that the amount of the refrigerants entering the indoor heat exchanger is reduced.
As an example, according to refrigeration demands of users under different temperature difference values, a first temperature threshold, a second temperature threshold and a third temperature threshold are selected in advance, wherein the first temperature threshold is greater than the second temperature threshold, the second temperature threshold is greater than the third temperature threshold, so that a first temperature interval, a second temperature interval, a third temperature interval and a fourth temperature interval are formed by the three temperature thresholds, wherein the first temperature interval includes the first temperature threshold, the second temperature interval includes the first temperature threshold and the second temperature threshold, the third temperature interval includes the second temperature threshold and the third temperature threshold, and the fourth temperature interval includes the third temperature threshold. And then, setting a mapping relation between the temperature interval and the opening value of the electronic expansion valve according to the refrigeration requirements of users in different intervals.
Further, the temperature difference value is compared with the temperature intervals of all the intervals, and the target temperature interval where the temperature difference value is located is determined.
When the target temperature interval is the first temperature interval, the refrigeration requirement of a user is larger, so that the electronic expansion valve is controlled to be closed, the compressor is controlled to normally operate, all refrigerants are controlled to flow into the indoor heat exchanger, and the indoor temperature is rapidly reduced.
When the target temperature interval is the second temperature interval, the refrigeration demand of the user is smaller than the refrigeration demand of the first temperature interval, so that the opening degree of the electronic expansion valve is controlled to be the first opening degree value, and the compressor is controlled to normally operate, so that the amount of the refrigerant entering the indoor heat exchanger is reduced.
And when the target temperature interval is the third temperature interval, the refrigeration requirement of a user is smaller, so that the opening degree of the electronic expansion valve is controlled to be the second opening degree value, and the compressor is controlled to normally operate. The second opening value is larger than the first opening value so as to further reduce the amount of refrigerant entering the indoor heat exchanger.
When the target temperature interval is the fourth temperature interval, the current refrigerating capacity of the air conditioner meets the requirements of users, so that the electronic expansion valve is controlled to be closed, the compressor is controlled to stop running, and the condition that the indoor temperature is too low due to excessive refrigeration of the air conditioner is avoided. When the compressor stops running, the control device of the fixed-frequency air conditioning system controls the indoor heat exchanger to be in an air supply mode or to be closed so as to maintain the current indoor temperature. Further, when the air conditioner stops refrigerating, the indoor temperature may rise under the influence of the external temperature, in order to continuously meet the refrigerating requirement of a user, as a possible implementation manner, when the compressor stops operating, the control device of the fixed-frequency air conditioning system continuously collects the temperature difference value between the inlet air temperature of the indoor heat exchanger and the set temperature, when the temperature difference value is greater than the fourth temperature threshold, the duration time that the temperature difference value is greater than the fourth temperature threshold is counted, and if the duration time reaches the preset duration threshold, the compressor is restarted. The fourth temperature threshold value is a preset temperature difference value of the refrigeration demand of the user, so that the compressor is restarted when the user has the refrigeration demand again, the refrigeration demand of the user is continuously met, meanwhile, the compressor is restarted after the preset time, and the problem that the service life of the air conditioner is shortened due to frequent starting and stopping of the compressor can be avoided.
To sum up, the control method of the fixed-frequency air conditioning system according to the embodiment of the present application detects the intake air temperature of the indoor heat exchanger when the air conditioning system operates in the cooling mode, obtains the temperature difference between the intake air temperature and the set temperature of the fixed-frequency air conditioning system, and finally adjusts the opening degree of the electronic expansion valve according to the temperature difference, and controls the opening or closing of the compressor. The method comprises the steps of adjusting the opening value of an electronic expansion valve according to the difference between the inlet air temperature of an indoor heat exchanger and the set temperature to control the quantity of refrigerants entering the indoor heat exchanger, when the temperature difference is large, the refrigeration requirement of a user on an air conditioner is large, the working load of the air conditioner is large, the electronic expansion valve is closed, all the refrigerants flow into the indoor heat exchanger to quickly reduce the indoor temperature, when the temperature difference is small, the opening value of the electronic expansion valve is adjusted according to the section where the temperature difference is located, so that the corresponding quantity of the refrigerants flow into the indoor heat exchanger, the indoor temperature is accurately controlled according to the refrigeration requirement of the user, the indoor temperature is maintained to be stable near the set temperature, the comfort of the user is improved, and resource waste caused by frequent starting.
In order to more clearly describe the implementation process of the control method of the fixed-frequency air conditioning system, a specific embodiment is described below.
The method comprises the steps of presetting temperature thresholds of 2 ℃, 1 ℃ and 0 ℃, further forming four temperature intervals, and presetting mapping relations between the temperature intervals and opening values of the electronic expansion valve. When the set temperature of the air conditioner in the refrigeration mode is 24 ℃, if the inlet air temperature of the indoor heat exchanger is 30 ℃, the indoor temperature is high, the refrigeration requirement of a user is high, so that the control device of the fixed-frequency air conditioning system controls the thermal expansion valve to close and controls the compressor to operate, the air conditioner performs refrigeration, when the temperature is reduced to 25.5 ℃, the opening degree of the thermal expansion valve is adjusted to be 30% and the compressor is kept to operate, when the temperature is reduced to 24.5 ℃, the opening degree of the thermal expansion valve is adjusted to be 60%, the compressor continues to operate, when the temperature is reduced to 23.5 ℃, the inlet air temperature of the indoor heat exchanger meets the refrigeration requirement of the user, the compressor is controlled to close, the indoor heat exchanger operates in the air supply mode, and after the compressor is closed, the control device of the fixed-frequency air conditioning system collects the temperature difference value between the inlet air temperature of the indoor heat exchanger and the set temperature through, and when the temperature of the inlet air is increased to 25 ℃ and lasts for one minute, controlling the compressor to be started again.
In order to implement the foregoing embodiments, an embodiment of the present application further provides a control device for a fixed-frequency air conditioning system, where the fixed-frequency air conditioning system includes: the loop consists of a compressor, an outdoor heat exchanger, a throttling element, an electronic expansion valve and an indoor heat exchanger; the first end of the electronic expansion valve is connected into a first pipeline between the compressor and the outdoor heat exchanger, the second end of the electronic expansion valve is connected into a second pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the third end of the electronic expansion valve is directly connected into the indoor heat exchanger. Fig. 4 is a schematic structural diagram of a control device of a constant-frequency air conditioning system according to an embodiment of the present application.
As shown in fig. 4, the control device of the constant-frequency air conditioning system includes: an acquisition module 100, an acquisition module 200, and a control module 300.
The acquisition module 100 is configured to detect an intake air temperature of the indoor heat exchanger when the indoor heat exchanger operates in the cooling mode.
The obtaining module 200 is configured to obtain a temperature difference between an intake air temperature and a set temperature of the fixed-frequency air conditioning system.
And the control module 300 is configured to adjust an opening degree of the electronic expansion valve according to the temperature difference, and control the compressor to be turned on or off.
In a possible implementation manner of the embodiment of the present application, the control module 300 is specifically configured to compare the temperature difference with a temperature interval formed by a preset temperature threshold, determine a target temperature interval in which the temperature difference is located, then determine a target opening degree of the electronic expansion valve according to the target temperature interval, and control to adjust the opening degree of the electronic expansion valve according to the target opening degree.
Specifically, the control module 300 is further configured to control the electronic expansion valve to close and control the compressor to normally operate when the target temperature interval is a first temperature interval, where the first temperature interval includes a first temperature threshold; when the target temperature interval is a second temperature interval, controlling the opening degree of the electronic expansion valve to be a first opening degree value, and controlling the compressor to normally operate, wherein the second temperature interval comprises a first temperature threshold value and a second temperature threshold value, and the second temperature threshold value is smaller than the first temperature threshold value; when the target temperature interval is a third temperature interval, controlling the opening degree of the electronic expansion valve to be a second opening degree value, and controlling the compressor to normally operate, wherein the third temperature interval comprises a second temperature threshold value and a third temperature threshold value, and the third temperature threshold value is smaller than the second temperature threshold value; and when the target temperature interval is a fourth temperature interval, controlling the electronic expansion valve to be closed and controlling the compressor to stop running, wherein the third temperature interval comprises a third temperature threshold value.
In a possible implementation manner of the embodiment of the present application, the control module 300 is further configured to control the indoor heat exchanger to be in the blowing mode or to be turned off when the compressor stops operating.
Further, when the control module 300 is further configured to continuously collect a temperature difference between the intake air temperature and the set temperature when the compressor stops operating, count a duration that the temperature difference is greater than the fourth temperature threshold when the temperature difference is greater than the fourth temperature threshold, and restart the compressor if the duration reaches a preset duration threshold.
It should be noted that the explanation of the embodiment of the control method of the constant-frequency air conditioning system is also applicable to the control device of the constant-frequency air conditioning system of the embodiment, and therefore, the explanation is not repeated herein.
The control device of the fixed-frequency air conditioning system of the embodiment of the application detects the air inlet temperature of the indoor heat exchanger when the control device operates in the cooling mode, obtains the temperature difference between the air inlet temperature and the set temperature of the fixed-frequency air conditioning system, adjusts the opening degree of the electronic expansion valve according to the temperature difference, and controls the opening or closing of the compressor. The device adjusts the opening value of the electronic expansion valve according to the difference value of the inlet air temperature and the set temperature of the indoor heat exchanger, so as to control the amount of the refrigerant entering the indoor heat exchanger, when the temperature difference value is large, the work load of the air conditioner is large, the electronic expansion valve is closed, the refrigerant flows into the indoor heat exchanger completely, so as to reduce the indoor temperature quickly, when the temperature difference value is small, the opening value of the electronic expansion valve is adjusted according to the interval where the temperature difference value is located, so that the refrigerant with the corresponding amount flows into the indoor heat exchanger, thereby realizing the accurate control of the indoor temperature, maintaining the indoor temperature to be stable near the set temperature, improving the comfort of a user, and avoiding the resource waste caused by frequent.
In order to realize the above embodiments, the embodiments of the present application further provide a fixed-frequency air conditioning system. The constant-frequency air conditioning system is the air conditioning system shown in fig. 1, and as shown in fig. 5, the constant-frequency air conditioning system not only includes the compressor 10, the outdoor heat exchanger 20, the throttling element 30, the electronic expansion valve 40 and the indoor heat exchanger 50, but also includes the control device 60 of the constant-frequency air conditioning system as described in the above embodiment. The control device 60 is connected to the compressor 10 and the electronic expansion valve 40, respectively, and is used for controlling the compressor 10 and the electronic expansion valve 40 according to the control method in the above embodiment.
In order to implement the above embodiments, the present invention further provides an electronic device.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 6, the electronic device 120 includes: a processor 121 and a memory 122; the memory 122 is used for storing executable program code; the processor 121 executes a program corresponding to the executable program code by reading the executable program code stored in the memory 122, for implementing the control method of the fixed-frequency air conditioning system as described in the above embodiments.
In order to implement the foregoing embodiments, the present application further proposes a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the control method of the fixed-frequency air conditioning system according to any one of the foregoing embodiments.
In the description of the present specification, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (15)

1. A control method of a fixed-frequency air conditioning system is characterized in that the fixed-frequency air conditioning system comprises the following steps: the loop consists of a compressor, an outdoor heat exchanger, a throttling element, an electronic expansion valve and an indoor heat exchanger; a first end of the electronic expansion valve is connected into a first pipeline between the compressor and the outdoor heat exchanger, a second end of the electronic expansion valve is connected into a second pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a third end of the electronic expansion valve is directly connected into the indoor heat exchanger;
the method comprises the following steps:
when the air conditioner runs in a refrigeration mode, the air inlet temperature of the indoor heat exchanger is detected;
acquiring a temperature difference value between the inlet air temperature and a set temperature of the fixed-frequency air conditioning system;
adjusting the opening degree of the electronic expansion valve according to the temperature difference, and controlling the opening or closing of the compressor;
and controlling the refrigerant to flow to the indoor heat exchanger according to the opening degree of the electronic expansion valve, and controlling the refrigerant flowing out of the indoor heat exchanger to flow to a condenser input pipe of the outdoor heat exchanger through the first pipeline.
2. The method of claim 1, wherein said adjusting the opening of the electronic expansion valve based on the temperature difference comprises:
comparing the temperature difference with a temperature interval formed by a preset temperature threshold value, and determining a target temperature interval in which the temperature difference is located;
and determining the target opening degree of the electronic expansion valve according to the target temperature interval, and adjusting the opening degree of the electronic expansion valve according to the target opening degree.
3. The method of claim 2, further comprising:
when the target temperature interval is a first temperature interval, controlling the electronic expansion valve to be closed, and controlling the compressor to normally operate; wherein the first temperature interval comprises a first temperature threshold;
when the target temperature interval is a second temperature interval, controlling the opening degree of the electronic expansion valve to be a first opening degree value, and controlling the compressor to normally operate; wherein the second temperature interval comprises the first temperature threshold and a second temperature threshold, wherein the second temperature threshold is less than the first temperature threshold;
when the target temperature interval is a third temperature interval, controlling the opening degree of the electronic expansion valve to be a second opening degree value, and controlling the compressor to normally operate; wherein the third temperature interval comprises the second temperature threshold and a third temperature threshold, wherein the third temperature threshold is less than the second temperature threshold;
when the target temperature interval is a fourth temperature interval, controlling the electronic expansion valve to be closed, and controlling the compressor to stop running; wherein the fourth temperature interval comprises the third temperature threshold.
4. The method of claim 3, further comprising:
and when the compressor stops running, controlling the indoor heat exchanger to be in an air supply mode or to be closed.
5. The method of claim 3, further comprising:
when the compressor stops operating, continuously collecting the temperature difference between the inlet air temperature and the set temperature;
and when the temperature difference value is greater than a fourth temperature threshold value, counting the duration of the temperature difference value greater than the fourth temperature threshold value, and if the duration reaches a preset duration threshold value, restarting the compressor.
6. A control apparatus for a fixed-frequency air conditioning system, the fixed-frequency air conditioning system comprising: the loop consists of a compressor, an outdoor heat exchanger, a throttling element, an electronic expansion valve and an indoor heat exchanger; a first end of the electronic expansion valve is connected into a first pipeline between the compressor and the outdoor heat exchanger, a second end of the electronic expansion valve is connected into a second pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a third end of the electronic expansion valve is directly connected into the indoor heat exchanger;
the control device of the fixed-frequency air conditioning system comprises:
the acquisition module is used for detecting the air inlet temperature of the indoor heat exchanger when the indoor heat exchanger operates in a refrigeration mode;
the acquisition module is used for acquiring a temperature difference value between the inlet air temperature and the set temperature of the fixed-frequency air conditioning system;
and the control module is used for adjusting the opening degree of the electronic expansion valve according to the temperature difference value and controlling the opening or closing of the compressor, wherein after the opening degree of the electronic expansion valve is adjusted, the control module is also used for controlling a refrigerant to flow to the indoor heat exchanger according to the opening degree of the electronic expansion valve and controlling the refrigerant flowing out of the indoor heat exchanger to flow to a condenser input pipe of the outdoor heat exchanger through the first pipeline.
7. The control device of the fixed-frequency air conditioning system as claimed in claim 6, wherein the control module is specifically configured to:
comparing the temperature difference with a temperature interval formed by a preset temperature threshold value, and determining a target temperature interval in which the temperature difference is located;
and determining the target opening degree of the electronic expansion valve according to the target temperature interval, and controlling to adjust the opening degree of the electronic expansion valve according to the target opening degree.
8. The control device of a fixed-frequency air conditioning system as claimed in claim 7, wherein the control module is further configured to:
when the target temperature interval is a first temperature interval, controlling the electronic expansion valve to be closed, and controlling the compressor to normally operate; wherein the first temperature interval comprises a first temperature threshold;
when the target temperature interval is a second temperature interval, controlling the opening degree of the electronic expansion valve to be a first opening degree value, and controlling the compressor to normally operate; wherein the second temperature interval comprises the first temperature threshold and a second temperature threshold, wherein the second temperature threshold is less than the first temperature threshold;
when the target temperature interval is a third temperature interval, controlling the opening degree of the electronic expansion valve to be a second opening degree value, and controlling the compressor to normally operate; wherein the third temperature interval comprises the second temperature threshold and a third temperature threshold, wherein the third temperature threshold is less than the second temperature threshold;
when the target temperature interval is a fourth temperature interval, controlling the electronic expansion valve to be closed, and controlling the compressor to stop running; wherein the third temperature interval comprises the third temperature threshold.
9. The control device of a fixed-frequency air conditioning system as claimed in claim 8, wherein the control module is further configured to:
and when the compressor stops running, controlling the indoor heat exchanger to be in an air supply mode or to be closed.
10. The control device of a fixed-frequency air conditioning system as claimed in claim 8, wherein the control module is further configured to:
when the compressor stops operating, continuously collecting the temperature difference between the inlet air temperature and the set temperature;
and when the temperature difference value is greater than a fourth temperature threshold value, counting the duration of the temperature difference value greater than the fourth temperature threshold value, and if the duration reaches a preset duration threshold value, restarting the compressor.
11. A fixed frequency air conditioning system, comprising: the loop consists of a compressor, an outdoor heat exchanger, a throttling element, an electronic expansion valve and an indoor heat exchanger; a first end of the electronic expansion valve is connected into a first pipeline between the compressor and the outdoor heat exchanger, a second end of the electronic expansion valve is connected into a second pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a third end of the electronic expansion valve is directly connected into the indoor heat exchanger, and the control device of the fixed-frequency air conditioning system as claimed in any one of claims 6 to 10.
12. The fixed frequency air conditioning system of claim 11, wherein the electronic expansion valve is a thermostatic expansion valve.
13. The fixed frequency air conditioning system of claim 11, wherein the throttling element is a capillary tube.
14. An electronic device comprising a memory, a processor;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the control method of the fixed-frequency air conditioning system according to any one of claims 1 to 5.
15. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the control method of the fixed frequency air conditioning system according to any one of claims 1 to 5.
CN201811015686.6A 2018-08-31 2018-08-31 Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system Active CN108731224B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811015686.6A CN108731224B (en) 2018-08-31 2018-08-31 Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811015686.6A CN108731224B (en) 2018-08-31 2018-08-31 Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system

Publications (2)

Publication Number Publication Date
CN108731224A CN108731224A (en) 2018-11-02
CN108731224B true CN108731224B (en) 2020-07-28

Family

ID=63943189

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811015686.6A Active CN108731224B (en) 2018-08-31 2018-08-31 Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system

Country Status (1)

Country Link
CN (1) CN108731224B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109855257A (en) * 2019-02-28 2019-06-07 宁波奥克斯电气股份有限公司 Improve control method, device, air conditioner and the storage medium of air conditioning comfortableness
CN110160231A (en) * 2019-05-29 2019-08-23 广东美的暖通设备有限公司 Valve body control method, indoor unit and computer readable storage medium
CN110173861A (en) * 2019-05-31 2019-08-27 广东美的制冷设备有限公司 Progress control method, control device, air conditioner and computer readable storage medium
CN110260553A (en) * 2019-06-10 2019-09-20 广东美的制冷设备有限公司 The control method of air conditioner and air conditioner
CN110470032A (en) * 2019-08-05 2019-11-19 宁波奥克斯电气股份有限公司 Leaving air temp control method, device, air conditioner and computer readable storage medium
CN110822544A (en) * 2019-11-05 2020-02-21 广东志高暖通设备股份有限公司 Fixed-frequency air conditioning system for improving indoor comfort
CN111043707A (en) * 2019-12-31 2020-04-21 海信(山东)空调有限公司 Compressor reverse rotation detection method and air conditioner
CN111336645A (en) * 2020-03-18 2020-06-26 宁波奥克斯电气股份有限公司 Air conditioner control method and device and air conditioner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1645016A (en) * 2005-01-27 2005-07-27 广东科龙电器股份有限公司 High temperature self-adaption separated air conditioners
CN105758034A (en) * 2016-04-06 2016-07-13 广东美的制冷设备有限公司 Air conditioning system and control method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100886887B1 (en) * 2008-10-24 2009-03-05 (주)동양테크놀로지 Heat-pump type air-conditioner
CN203100306U (en) * 2012-12-26 2013-07-31 广东美的制冷设备有限公司 Liquid storage type air conditioner system
CN203642421U (en) * 2013-12-13 2014-06-11 江西清华泰豪三波电机有限公司 Thermoregulation dehumidifier
CN107101341A (en) * 2017-05-25 2017-08-29 深圳沃海森科技有限公司 Idle call low voltage control and energy conditioner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1645016A (en) * 2005-01-27 2005-07-27 广东科龙电器股份有限公司 High temperature self-adaption separated air conditioners
CN105758034A (en) * 2016-04-06 2016-07-13 广东美的制冷设备有限公司 Air conditioning system and control method thereof

Also Published As

Publication number Publication date
CN108731224A (en) 2018-11-02

Similar Documents

Publication Publication Date Title
CN108731224B (en) Control method, device and equipment of fixed-frequency air conditioning system and fixed-frequency air conditioning system
CN108317667B (en) Method and device for detecting icing of air conditioner indoor unit
KR101626675B1 (en) An air conditioning system and a method for controlling the same
US9562696B2 (en) Hot water supply system control apparatus and hot water supply system control program and hot water supply system operating method
CN107940827B (en) Multi-split air conditioning system and refrigerant distribution control method and device thereof
CN105371545B (en) The refrigerant circulation amount adjustment method of air conditioner and its refrigeration system
CN103292432A (en) Method and device for accurately regulating electronic expansion valve and temperature-accurately-regulated air conditioner
CN107940826B (en) Multi-split air conditioning system and refrigerant distribution control method and device thereof
KR101235546B1 (en) An air conditioner and a control method the same
CN110736203A (en) Control method and control device for defrosting of air conditioner and air conditioner
CN109579213B (en) Air conditioner temperature control method, storage device and air conditioner
WO2019237959A1 (en) Method and device for controlling air conditioner and air conditioner having same
CN101852523B (en) Superheat degree control method and system for refrigeration circulation system
CN108692425B (en) Defrosting control method for air conditioner
JP6576566B2 (en) Air conditioner
CN107631447A (en) Progress control method, operating control device, air conditioner and storage medium
EP3757469A1 (en) Air conditioning system control method and device and air conditioning system
US10655877B2 (en) Evaporator coil protection for HVAC systems
JP5677198B2 (en) Air cooling heat pump chiller
CN108800425B (en) Control method and device for preventing frequent start and stop of air conditioner and air conditioner
CN109340992B (en) Operation method and system for controlling reliability of air conditioner and air conditioner
CN112856712A (en) Expansion valve control method and device
US11034210B2 (en) Peak demand response operation of HVAC systems
US20210048212A1 (en) Peak demand response operation of hvac system with face-split evaporator
US11009249B2 (en) Peak demand response operation with improved sensible capacity

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant