CN111023455B - Defrosting control method, defrosting control device, air conditioner and readable storage medium - Google Patents
Defrosting control method, defrosting control device, air conditioner and readable storage medium Download PDFInfo
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- CN111023455B CN111023455B CN201911367644.3A CN201911367644A CN111023455B CN 111023455 B CN111023455 B CN 111023455B CN 201911367644 A CN201911367644 A CN 201911367644A CN 111023455 B CN111023455 B CN 111023455B
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- expansion valve
- electronic expansion
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a defrosting control method, which is applied to a defrosting control device, wherein the device comprises a compressor, an electronic expansion valve is connected on the compressor, and the method comprises the following steps: when the defrosting mode is started, acquiring the exhaust temperature of the compressor, and comparing the exhaust temperature with a preset exhaust temperature; adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result; and comparing the exhaust pressure of the compressor with a preset exhaust pressure after a preset time, and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result. The invention also discloses a defrosting control device, an air conditioner and a readable storage medium. The invention dynamically adjusts the flow opening of the electronic expansion valve through the exhaust parameters of the compressor, thereby adjusting the refrigerant circulation quantity of the compressor, effectively defrosting and shortening the defrosting time.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method, a defrosting control device, an air conditioner and a readable storage medium.
Background
When the air conditioner heats in winter, frosting is a common phenomenon in system operation, when the surface temperature of the outdoor heat exchanger is lower than the dew point of air, water vapor in the air can be condensed, when the temperature is lower than 0 ℃, the condensed dew can be accumulated on the surface of the outdoor heat exchanger to form frost, when the frost is formed to a certain thickness, the heating capacity of the air conditioner is lower and lower, and therefore in order to guarantee the heating effect, the outdoor heat exchanger needs to be defrosted. The defrosting of the outdoor heat exchanger can be realized by adjusting the operating parameters of the electronic expansion valve, so that the defrosting effect of the outdoor unit is realized, but the electronic expansion valve usually adopts a fixed opening degree to defrost during defrosting, but the opening degree is not set properly, so that the phenomenon of overlong defrosting time can occur, and the defrosting effect is influenced.
Disclosure of Invention
The invention provides a defrosting control method, a defrosting control system, an air conditioner and a readable storage medium, and aims to solve the problem that the defrosting time is too long due to improper opening of an electronic expansion valve in the defrosting process.
In order to achieve the above object, the present invention provides a defrosting control method, which is applied to a defrosting control device, the device includes a compressor, an electronic expansion valve is connected to the compressor, and the method includes the steps of:
when the defrosting mode is started, acquiring the exhaust temperature of the compressor, and comparing the exhaust temperature with a preset exhaust temperature;
adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result;
and comparing the exhaust pressure of the compressor with a preset exhaust pressure after a preset time, and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result.
Preferably, the adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result includes:
and when the exhaust temperature is lower than the preset exhaust temperature, adjusting the electronic expansion valve to a first preset opening degree.
Preferably, the step of comparing the discharge pressure of the compressor with a preset discharge pressure and adjusting the opening degree of the electronic expansion valve according to the discharge pressure comparison result comprises:
and when the exhaust pressure is greater than or equal to a preset exhaust pressure, adjusting the electronic expansion valve to a second preset opening degree, wherein the second preset opening degree is greater than the first preset opening degree.
Preferably, the step of adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result further includes:
and when the exhaust temperature is greater than or equal to the preset exhaust temperature, adjusting the electronic expansion valve to a third preset opening degree.
Preferably, the step of comparing the discharge pressure of the compressor with a preset discharge pressure and adjusting the opening of the electronic expansion valve according to the discharge pressure comparison result further includes:
and when the exhaust pressure is smaller than the preset exhaust pressure, adjusting the electronic expansion valve to a fourth preset opening, wherein the fourth preset opening is smaller than the preset third opening.
Preferably, after the step of adjusting the opening degree of the electronic expansion valve according to the exhaust pressure comparison result, the method further includes:
acquiring current defrosting time, and determining whether the current defrosting time reaches preset defrosting time or not;
if yes, exiting the defrosting mode;
if not, returning to the step of comparing the exhaust pressure of the compressor with the preset exhaust pressure and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result.
Preferably, after the defrosting mode is started and before the step of obtaining the discharge temperature of the compressor, the method further includes:
after receiving a heating mode starting instruction, detecting whether a defrosting mode needs to be started or not;
if yes, the defrosting mode is started.
Further, to achieve the above object, the present invention also provides a defrosting control apparatus including: a communication module, a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the defrost control method as described above.
In addition, in order to achieve the above object, the present invention also provides an air conditioner including the defrosting control device.
Further, to achieve the above object, the present invention also provides a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the defrost control method as described above.
According to the invention, after the defrosting mode is started, the exhaust temperature of the compressor is obtained, and the exhaust temperature is compared with the preset exhaust temperature; adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result; and comparing the exhaust pressure of the compressor with a preset exhaust pressure after a preset time, and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result. The invention dynamically adjusts the flow opening of the electronic expansion valve through the exhaust parameters of the compressor, thereby adjusting the refrigerant circulation quantity of the compressor, effectively defrosting and shortening the defrosting time.
Drawings
Fig. 1 is a schematic diagram of a hardware configuration of a defrosting control apparatus according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a first embodiment of the defrosting control method according to the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a defrosting control device provided by the present invention.
The defrosting control device may include a communication module 10, a memory 20, a processor 30, and the like in terms of hardware configuration. In the defrosting control device, the processor 30 is connected to the memory 20 and the communication module 10, respectively, and the memory 20 stores thereon a computer program which is executed by the processor 30 at the same time, and when executed, implements the steps of the following method embodiment.
The communication module 10 may be connected to an external communication device through a network. The communication module 10 may receive a request from an external communication device, and may also send a request, an instruction, and information to the external communication device. The external communication device may be a user terminal or other system server, etc.
The memory 20 may be used to store software programs as well as various data. The memory 20 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as obtaining a discharge temperature of the compressor), and the like; the storage data area may include a database, and the storage data area may store data or information created according to the use of the defrost control device, or the like. Further, the memory 20 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.
The processor 30, which is a control center of the defrosting control device, connects various parts of the entire defrosting control device by using various interfaces and lines, and performs various functions of the defrosting control device and processes data by operating or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby performing overall monitoring of the defrosting control device. Processor 30 may include one or more processing units; alternatively, the processor 30 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 30.
Although not shown in fig. 1, the defrosting control device may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components. Those skilled in the art will appreciate that the defrost control arrangement shown in fig. 1 does not constitute a limitation of the defrost control and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
Based on the hardware structure, various embodiments of the method of the invention are provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a defrosting control method according to the present invention, in this embodiment, the method includes:
step S10, after the defrosting mode is started, acquiring the exhaust temperature of the compressor, and comparing the exhaust temperature with a preset exhaust temperature;
step S20, adjusting the opening of the electronic expansion valve according to the exhaust temperature comparison result;
at present, most of the main types of air conditioners have a heat exchange function with a cooling and heating mode, and users generally adjust the air conditioner to the heating mode to utilize the air conditioner to increase the temperature of an indoor environment in low-temperature areas or under the weather conditions with heavy wind and snow. In the operation and heating process of the air conditioner, the outdoor heat exchanger of the outdoor unit plays a role of an evaporator absorbing heat from the outdoor environment, and is influenced by the temperature and the humidity of the outdoor environment, more frost is easily condensed on the outdoor heat exchanger, and the heating capacity of the air conditioner is lower and lower after the frost is formed to a certain thickness, so that in order to ensure the heating effect and avoid excessive frost condensation, the outdoor heat exchanger needs to be defrosted, namely the air conditioner starts a defrosting mode and carries out reverse refrigeration and defrosting, a four-way valve is arranged on a refrigeration system, when a control system detects that the defrosting condition is met, the four-way valve is switched to switch from a heating state to a cooling state, the outdoor heat exchanger is in heat dissipation, and the heat exchanger is defrosted by using hot gas. Furthermore, the operation parameters of the electronic expansion valve are adjusted to control the circulation amount of the refrigerant, so that the outdoor heat exchanger is defrosted. In the prior art, the opening of the electronic expansion valve is usually fixed during defrosting, but if the opening is set to be too small, the defrosting time is too long or the phenomenon of incomplete defrosting can occur; however, if the opening is set to be too large, a liquid return phenomenon may occur.
In the embodiment, the circulation amount of the refrigerant in the refrigeration system is controlled by adjusting the flow opening of the electronic expansion valve, and after the air conditioner starts the defrosting mode, the high-temperature and high-pressure gaseous refrigerant in the compressor flows into the outdoor heat exchanger to release heat so as to defrost the outdoor heat exchanger. Firstly, obtaining the exhaust temperature of a compressor, comparing the exhaust temperature of the compressor with a preset exhaust temperature, and when the exhaust temperature of the compressor is too low, indicating that the refrigerant circulation quantity in a refrigeration system is large, the compressor has the possibility of liquid-carrying operation and the risk of liquid compression, so that the exhaust temperature of the compressor cannot reach a normal value, and the refrigerant discharged by the compressor has a low temperature and cannot effectively defrost an outdoor heat exchanger, therefore, the opening degree of an electronic expansion valve is properly reduced, the refrigerant circulation quantity in the refrigeration system is reduced, and the refrigerant discharge quantity of the compressor is further reduced; when the exhaust temperature of the compressor is too high, a large amount of high-temperature refrigerants exist in the compressor, and the flow opening of the electronic expansion valve can be properly increased, so that the refrigerant circulation volume of the refrigerating system can be increased, the refrigerant volume of the compressor flowing into the outdoor heat exchanger is further increased, and defrosting is accelerated. The over-high exhaust temperature of the compressor can cause the overheating of the compressor and has serious influence on the work of the compressor, and the opening of the electronic expansion valve is adjusted at the moment, so that low-temperature and low-pressure refrigerant can flow into the compressor to reduce the temperature of the compressor, thereby ensuring the normal operation of the compressor. The working state of the compressor is further known through the exhaust temperature, and the circulation quantity of the refrigerant in the refrigeration system is controlled by adjusting the opening of the electronic expansion valve, so that the refrigerant discharge quantity of the compressor is adjusted to ensure the normal defrosting.
And step S30, comparing the exhaust pressure of the compressor with a preset exhaust pressure after a preset time, and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result.
In the embodiment, the flow opening of the electronic expansion valve is adjusted according to the exhaust temperature of the compressor, defrosting is performed according to the adjusted flow opening, the exhaust pressure of the compressor is obtained after a preset time, the exhaust pressure is compared with the preset exhaust pressure, when the exhaust pressure of the compressor is too low, the pressure of the refrigeration system is low, the compressor is likely to run with liquid, and the risk of liquid compression exists, at the moment, the flow opening of the electronic expansion valve can be reduced, so that the refrigerant circulation quantity in the refrigeration system is adjusted, and the refrigerant quantity flowing into the outdoor heat exchanger by the compressor is further adjusted; when the exhaust pressure of the compressor is too high, the pressure of the refrigeration system is relatively high, a large amount of high-temperature and high-pressure refrigerants exist in the compressor, and the flow opening of the electronic expansion valve can be increased, so that the refrigerant circulation quantity in the refrigeration system is adjusted, and the refrigerant quantity flowing into the outdoor heat exchanger by the compressor is further adjusted. In this embodiment, after the air conditioner is started in the initial mode, the flow opening of the electronic expansion valve is dynamically adjusted according to the exhaust temperature of the compressor and the exhaust pressure of the compressor, so that the refrigerant circulation volume in the refrigeration system is adjusted, and the defrosting time is shortened.
Further, a second embodiment of the defrosting control method of the present invention is proposed based on the first embodiment of the defrosting control method of the present invention, and in this embodiment, the step S20 includes:
and step S21, when the exhaust temperature is lower than the preset exhaust temperature, adjusting the electronic expansion valve to a first preset opening degree.
In this embodiment, after the defrosting mode is started, the exhaust temperature of the compressor is obtained, when the exhaust temperature of the compressor is lower than the preset exhaust temperature, it is described that the refrigerant flow rate of the refrigeration cycle system is too large, the temperature of the refrigerant discharged by the compressor cannot be effectively defrosted, the compressor has the possibility of liquid-carrying operation, there is a risk of liquid compression, the refrigerant circulation amount in the refrigeration system needs to be adjusted, and the current flow opening degree of the electronic expansion valve at this time needs to be adjusted to a first preset opening degree, where the first preset opening degree is a half-open opening degree of the electronic expansion valve, actually, the refrigerant circulation amount in the whole refrigeration system is reduced, and the refrigerant amount flowing into the outdoor heat exchanger by the compressor is also reduced, and if the flow opening degree of the electronic expansion valve is not adjusted, defrosting is continued to be performed at the current flow opening degree, so as to affect defrosting, the current flow opening degree of the electronic expansion valve is reduced first, and then the exhaust pressure of the compressor is obtained, and the flow opening of the electronic expansion valve is increased after the compressor discharges high-temperature and high-pressure refrigerants, so that the defrosting time is shortened.
Further, step S30 includes:
step S31, when the exhaust pressure is larger than or equal to a preset exhaust pressure, adjusting the electronic expansion valve to a second preset opening degree, wherein the second preset opening degree is larger than the first preset opening degree;
in this embodiment, when the discharge temperature of the compressor is less than the preset discharge temperature, the opening of the electronic expansion valve is adjusted to a first preset opening, after a preset time, the discharge pressure of the compressor is obtained, the discharge pressure of the compressor is compared with the preset discharge pressure, when the discharge pressure of the compressor is greater than or equal to the preset discharge pressure, it is indicated that the pressure in the refrigeration system is relatively high, it is indicated that a large amount of high-temperature and high-pressure refrigerants exist in the compressor, the flow opening of the electronic expansion valve can be adjusted from the current first preset opening to a second preset opening, where the second preset opening is greater than the first preset opening, the second preset opening is a full opening of the electronic expansion valve, the electronic expansion valve defrosts at the full opening, and the electronic expansion valve is adjusted to a maximum opening, so that the refrigerant circulation amount of the whole refrigeration system can be accelerated, and the high-temperature refrigerant in the compressor can be discharged at a high pressure, The high-pressure refrigerant flows into the outdoor heat exchanger at the maximum flow velocity to achieve the purpose of rapid defrosting, thereby effectively shortening the defrosting time.
And step S32, when the exhaust pressure is smaller than the preset exhaust pressure, the opening of the electronic expansion valve is not adjusted.
In this embodiment, when the exhaust pressure is less than the preset exhaust pressure, it is described that the pressure in the refrigeration system is relatively low, a refrigerant in the compressor does not reach a normal pressure value, there may be a possibility that the compressor may operate with liquid, and there is a risk of liquid compression, at this time, the electronic expansion valve still performs defrosting at the first preset opening, the flow opening of the electronic expansion valve is not adjusted, if it is detected that the exhaust pressure is greater than or equal to the preset exhaust pressure, the opening of the electronic expansion valve is adjusted, the flow opening of the electronic expansion valve is dynamically adjusted by the exhaust parameter of the compressor, and compared with defrosting at a fixed opening, the defrosting time can be effectively shortened.
Further, a third embodiment of the defrosting control method of the present invention is proposed based on the first embodiment of the defrosting control method of the present invention, and in this embodiment, the step S20 further includes:
and step S22, when the exhaust temperature is greater than or equal to the preset exhaust temperature, adjusting the electronic expansion valve to a third preset opening degree.
In this embodiment, after the defrosting mode is started, the discharge temperature of the compressor is obtained, when the discharge temperature of the compressor is greater than or equal to the preset discharge temperature, the low-temperature and low-pressure refrigerant is converted into the high-temperature and high-pressure refrigerant under the driving of the compressor, so as to effectively defrost, and at this time, the refrigeration cycle amount is low, so as to increase the refrigerant flow of the refrigeration cycle system, and adjust the opening of the electronic expansion valve to a third preset opening, wherein the third preset opening can be set such that the electronic expansion valve is fully opened, the electronic expansion valve performs defrosting with the full opening, the electronic expansion valve is adjusted to a maximum opening, the electronic expansion valve performs defrosting with the full opening, the electronic expansion valve is adjusted to the maximum opening, so as to accelerate the refrigerant circulation amount of the whole refrigeration system, and allow the high-temperature and high-pressure refrigerant in the compressor to flow into the outdoor heat exchanger at a maximum flow rate, so as to achieve the purpose of quick defrosting and effectively shorten the defrosting time.
Further, after step S30, the method further includes:
step S33, when the exhaust pressure is smaller than a preset exhaust pressure, adjusting the electronic expansion valve to a fourth preset opening degree, wherein the fourth preset opening degree is smaller than the preset third opening degree;
in this embodiment, when the discharge temperature of the compressor is greater than or equal to the preset discharge temperature, the opening of the electronic expansion valve is adjusted to a third preset opening, after a preset time, the discharge pressure of the compressor is obtained, the discharge pressure of the compressor is compared with the preset discharge pressure, when the discharge pressure of the compressor is less than the preset discharge pressure, it is indicated that the pressure in the refrigeration system is relatively low, the compressor may operate with liquid, the refrigerant in the compressor does not reach a normal pressure value, the compressor may operate with liquid, and there is a risk of liquid compression, at this time, the opening of the electronic expansion valve may be properly reduced, the opening of the electronic expansion valve is adjusted from the third preset opening to a fourth preset opening, wherein the fourth preset opening of the electronic expansion valve may be set to half-open, and the electronic expansion valve performs defrosting with half-open, if the exhaust pressure is detected to be greater than or equal to the preset exhaust pressure, the opening of the electronic expansion valve is adjusted, and the flow opening of the electronic expansion valve is dynamically adjusted according to the exhaust parameters of the compressor by detecting the exhaust parameters of the compressor, so that defrosting can be more effectively performed.
And step S34, when the exhaust pressure is greater than or equal to the preset exhaust pressure, the opening of the electronic expansion valve is not adjusted.
In this embodiment, when the discharge pressure of the compressor is greater than or equal to the preset discharge pressure, the opening of the electronic expansion valve is a third preset opening, that is, fully opened, the circulation volume of the entire refrigeration system has been adjusted to the maximum, and the high-temperature and high-pressure refrigerant in the compressor flows into the outdoor heat exchanger at the maximum flow rate, and at this time, the flow opening of the electronic expansion valve does not need to be adjusted, so that the defrosting can be completed quickly, and at this time, the defrosting effect is good. The flow opening of the electronic expansion valve is dynamically adjusted through the exhaust parameters of the compressor, and compared with defrosting with a fixed opening, the defrosting time can be effectively shortened.
Further, a fourth embodiment of the defrosting control method of the present invention is proposed based on the first embodiment of the defrosting control method of the present invention, and in this embodiment, after step S30, the method further includes:
step S40, obtaining the current defrosting time, and determining whether the current defrosting time reaches the preset defrosting time; if yes, go to step S50; if not, the process returns to step S30.
In step S50, the defrost mode is exited.
In the embodiment, the current defrosting time is obtained, whether the current defrosting time reaches the preset defrosting time is judged, and if the current defrosting time reaches the preset defrosting time, the defrosting mode is exited; if the current defrosting time does not reach the preset defrosting time, the exhaust pressure of the compressor is obtained again, the exhaust pressure of the compressor is compared with the preset exhaust pressure, the flow opening degree of the electronic expansion valve is adjusted according to the comparison result, the flow opening degree of the electronic expansion valve is dynamically adjusted according to the exhaust parameters of the compressor, defrosting can be effectively carried out, the flow opening degree of the electronic expansion valve is dynamically adjusted according to the exhaust parameters of the compressor, and compared with defrosting with fixed opening degree, the defrosting time can be effectively shortened.
Further, a fifth embodiment of the defrosting control method of the present invention is proposed based on the first embodiment of the defrosting control method of the present invention, and in this embodiment, before step S10, the method further includes:
step S100, after receiving a heating mode starting instruction, detecting whether a defrosting mode needs to be started or not;
and step S200, if yes, starting a defrosting mode.
In the embodiment, after the instruction of starting the heating mode is received, whether the defrosting mode needs to be started is detected, the temperature of the outdoor heat exchanger can be detected, so that whether the defrosting mode is started is judged, when the temperature of the outdoor heat exchanger is less than or equal to the preset temperature, the defrosting mode is started, and because frosting occurs when the temperature of the outdoor heat exchanger is lower than 0 ℃, the preset temperature can be set to 0 ℃; when the temperature of the outdoor heat exchanger is higher than the preset temperature, the defrosting mode does not need to be started at the moment. The defrosting mode is started, so that the outdoor heat exchanger can be effectively defrosted, and the air conditioner can better heat.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be a Memory in the defrosting control apparatus of fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In addition, the invention also provides an air conditioner, which comprises the defrosting control device, and the embodiments are also suitable for the air conditioner and can realize the same technical effect, and the details are not repeated herein.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples described in this specification, as well as features of various embodiments or examples, may be combined and combined by those skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A defrosting control method is applied to a defrosting control device, the device comprises a compressor, and an electronic expansion valve is connected to the compressor, and the method is characterized by comprising the following steps:
when the defrosting mode is started, acquiring the exhaust temperature of the compressor, and comparing the exhaust temperature with a preset exhaust temperature;
adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result;
wherein the step of adjusting the opening degree of the electronic expansion valve according to the exhaust temperature comparison result comprises:
when the exhaust temperature is lower than the preset exhaust temperature, adjusting the electronic expansion valve to a first preset opening degree;
after a preset time, comparing the exhaust pressure of the compressor with a preset exhaust pressure, and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result;
wherein, the step of comparing the exhaust pressure of the compressor with a preset exhaust pressure and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result comprises:
and when the exhaust pressure is greater than or equal to a preset exhaust pressure, adjusting the electronic expansion valve to a second preset opening degree, wherein the second preset opening degree is greater than the first preset opening degree, and the second preset opening degree is the full-opening degree of the electronic expansion valve.
2. The defrost control method of claim 1, wherein said step of adjusting an opening degree of the electronic expansion valve based on the exhaust temperature comparison further comprises:
and when the exhaust temperature is greater than or equal to the preset exhaust temperature, adjusting the electronic expansion valve to a third preset opening degree.
3. The defrost control method of claim 2, wherein the step of comparing the discharge pressure of the compressor with a preset discharge pressure and adjusting the opening degree of the electronic expansion valve according to the discharge pressure comparison result, further comprises:
and when the exhaust pressure is smaller than the preset exhaust pressure, adjusting the electronic expansion valve to a fourth preset opening, wherein the fourth preset opening is smaller than the preset third opening.
4. The defrost control method of claim 1, further comprising, after the step of adjusting the opening of the electronic expansion valve based on the exhaust pressure comparison, the step of:
acquiring current defrosting time, and determining whether the current defrosting time reaches preset defrosting time or not;
if yes, exiting the defrosting mode;
if not, returning to the step of comparing the exhaust pressure of the compressor with the preset exhaust pressure and adjusting the opening of the electronic expansion valve according to the exhaust pressure comparison result.
5. The defrost control method of claim 1, wherein said step of obtaining a discharge temperature of said compressor after said defrost mode is initiated further comprises:
after receiving a heating mode starting instruction, detecting whether a defrosting mode needs to be started or not;
if yes, the defrosting mode is started.
6. A defrost control apparatus, said apparatus comprising: a communication module, a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing a defrost control method according to any of claims 1-5.
7. An air conditioner characterized by comprising the defrosting control means as set forth in claim 6.
8. A readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the defrost control method according to any of the claims 1-5.
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| CN111981638B (en) * | 2020-08-21 | 2021-08-24 | Tcl空调器(中山)有限公司 | Control method of expansion valve, defrosting device, air conditioner and storage medium |
| CN112161390B (en) * | 2020-09-15 | 2021-11-02 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and device and air conditioner |
| CN113074452A (en) * | 2021-03-19 | 2021-07-06 | 海信（山东）空调有限公司 | Defrosting control method of air conditioner, air conditioner and storage medium |
| CN113175731B (en) * | 2021-04-20 | 2022-12-13 | 海信空调有限公司 | Defrosting control method of air conditioner and air conditioner |
| CN113418274A (en) * | 2021-06-25 | 2021-09-21 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner, processor and air conditioner |
| CN113776230A (en) * | 2021-09-25 | 2021-12-10 | 益鹏智能系统科技(上海)有限公司 | Control method and system for natural gas heating electronic expansion valve |
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