CN116241950A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN116241950A CN116241950A CN202310302446.9A CN202310302446A CN116241950A CN 116241950 A CN116241950 A CN 116241950A CN 202310302446 A CN202310302446 A CN 202310302446A CN 116241950 A CN116241950 A CN 116241950A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the application discloses an air conditioner and a control method thereof, relates to the technical field of air conditioners, and is used for solving the problem that the temperature regulation effect of the air conditioner is poor when the air conditioner is in a return air short-circuit running state. The air conditioner includes: an outdoor unit; an indoor unit; a refrigerant circulation circuit; a compressor; a first temperature sensor; a second temperature sensor; a third temperature sensor; a controller configured to: acquiring continuous operation time of a compressor, return air temperature detected by a first temperature sensor, outlet air temperature detected by a second temperature sensor and indoor temperature detected by a third temperature sensor; when the continuous operation duration reaches the preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the compressor is controlled to operate in a return air short circuit correction mode.
Description
Technical Field
The present disclosure relates to air conditioners, and particularly to an air conditioner and a control method thereof.
Background
With the increasing quality of life, air conditioners are becoming a stock household appliance for home use. The indoor temperature and humidity are in the comfortable temperature and humidity range of the user through the functions of refrigerating, heating, humidifying and dehumidifying of the air conditioner. However, in the daily use of the air conditioner, some abnormal situations, such as a return air short circuit of the indoor unit, may occur. After the return air short circuit occurs, the indoor opportunity misjudges that the indoor temperature reaches the target temperature set by a user, so that the condition of stopping and reducing the frequency of the compressor can occur. Thus, the actual indoor temperature during the return air short circuit may not meet the user demand, and the user experience is poor.
Therefore, how to make the indoor unit adjust the operation parameters of the air conditioner when the air conditioner has a return short circuit so as to realize the normal operation of the air conditioner becomes the current problem to be solved urgently.
Disclosure of Invention
The application provides an air conditioner and a control method thereof, which are used for solving the problem that the air conditioning effect of the air conditioner is poor when the air conditioner is in a return air short-circuit running state.
In order to achieve the above purpose, the following technical scheme is adopted in the application.
In a first aspect, an embodiment of the present application provides an air conditioner, including: an outdoor unit including an outdoor heat exchanger; the indoor unit comprises an indoor heat exchanger; wherein, the outdoor heat exchanger and the indoor heat exchanger, one works as a condenser, and the other works as an evaporator; the refrigerant circulation loop is used for controlling the refrigerant to circulate in a loop formed by the compressor, the condenser, the expansion valve and the evaporator; the compressor is used for compressing the refrigerant gas and discharging the compressed refrigerant gas to the condenser; the first temperature sensor is arranged at the air return port of the indoor unit and used for detecting the air return temperature at the air return port; the second temperature sensor is arranged at the air outlet of the indoor unit and used for detecting the air outlet temperature at the air outlet; a third temperature sensor for detecting an indoor temperature; a controller configured to: acquiring continuous operation time of a compressor, return air temperature detected by a first temperature sensor, outlet air temperature detected by a second temperature sensor and indoor temperature detected by a third temperature sensor; when the continuous operation duration reaches the preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration, wherein the first difference value is determined when the air conditioner is started; the compressor is controlled to operate in a return air short circuit correction mode.
The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: according to the technical scheme, whether the air conditioner enters the return air short-circuit operation state or not is judged through the continuous operation time of the compressor, the return air temperature of the indoor unit, the air outlet temperature and the indoor temperature, and the judging method is timely and accurate. Meanwhile, after the air conditioner is determined to enter the return air short circuit operation state, the air conditioner is controlled to operate in a return air short circuit correction mode, so that the frequency or state of the compressor is corrected, the air conditioner is operated according to a working mode expected by a user, the use comfort of the user is improved, and the air conditioning effect of the air conditioner is improved.
In some embodiments, the type of compressor includes a variable frequency compressor or a fixed speed compressor.
In some embodiments, the controller is configured to control the compressor to operate in a return air short circuit correction mode, and is specifically configured to: if the compressor is a variable frequency compressor, determining a target frequency according to the indoor temperature and the set temperature; the operating frequency of the compressor is adjusted to a target frequency.
In some embodiments, the controller is configured to control the compressor to operate in a return air short circuit correction mode, specifically configured to: if the type of the compressor is a constant-speed compressor, controlling the compressor to enter a target state according to the running mode and the indoor temperature of the air conditioner; the target states include a start-up state and a stop state.
In some embodiments, the controller is configured to control the compressor to enter a target state according to an operation mode of the air conditioner and an indoor temperature, and is specifically configured to: if the operation mode of the air conditioner is a refrigeration operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is greater than or equal to the maximum temperature value in the preset temperature range; or controlling the compressor to enter a shutdown state under the condition that the indoor temperature is smaller than the minimum temperature value in the preset temperature range; or, in case that the indoor temperature is within the preset temperature range, controlling the compressor to maintain the current state.
In some embodiments, the controller is further configured to: a controller configured to control the compressor to enter a target state according to an operation mode of the air conditioner and an indoor temperature, and specifically configured to: if the operation mode of the air conditioner is a heating operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is smaller than or equal to the minimum temperature value in the preset temperature range; or controlling the compressor to enter a shutdown state under the condition that the indoor temperature is greater than or equal to the maximum temperature value in the preset temperature range; or, in case that the indoor temperature is within the preset temperature range, controlling the compressor to maintain the current state.
In some embodiments, the controller is further configured to: a controller, further configured to: and when the continuous operation duration does not reach the preset duration, and/or when the change value of the difference value between the return air temperature and the air outlet temperature is greater than or equal to a first preset threshold value, and/or when the difference value between the return air temperature and the indoor temperature is less than or equal to a second preset threshold value, determining that the air conditioner is not in a return air short-circuit operation state.
In a second aspect, an embodiment of the present application provides a method for controlling an air conditioner, including: acquiring the continuous operation time length, the return air temperature, the air outlet temperature and the indoor temperature of the compressor; when the continuous operation duration reaches the preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration, wherein the first difference value is determined when the air conditioner is started; controlling the compressor to operate in a return air short circuit correction mode; the return air short circuit correction mode is used for correcting the running frequency of the compressor or the state of the compressor when the air conditioner is in a return air short circuit running state.
In a third aspect, embodiments of the present application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the controller to perform any of the methods of controlling an air conditioner provided in the second aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform the method provided in the second aspect and in a possible implementation.
In a fifth aspect, embodiments of the present invention provide a computer program product directly loadable into a memory and comprising software code, the computer program product being capable of performing the method as provided in the second aspect and in a possible implementation after being loaded and executed via a computer.
It should be noted that the above-mentioned computer instructions may be stored in whole or in part on a computer-readable storage medium. The computer readable storage medium may be packaged together with the processor of the controller or may be packaged separately from the processor of the controller, which is not limited in this application.
The beneficial effects described in the second to fifth aspects of the present application may refer to the beneficial effect analysis of the first aspect, and are not described here in detail.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
Fig. 1 is a schematic diagram of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a throttling device according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another throttling device according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of an air conditioner according to an embodiment of the present application;
fig. 5 is a schematic diagram of a setting position of a temperature sensor according to an embodiment of the present application;
fig. 6 is a hardware configuration block diagram of an air conditioner according to an embodiment of the present application;
fig. 7 is a schematic flow chart of a control method of an air conditioner according to an embodiment of the present application;
FIG. 8 is a flow chart of a method for determining a target state of a compressor according to an embodiment of the present disclosure;
FIG. 9 is a schematic illustration of a polyline for determining a target state of a compressor, as provided by an embodiment of the present application;
FIG. 10 is a schematic illustration of another polyline for determining a target state of a compressor provided in an embodiment of the present application;
FIG. 11 is a flowchart illustrating a method for determining a target state of a compressor according to an embodiment of the present disclosure;
FIG. 12 is a schematic illustration of another polyline for determining a target state of a compressor provided in an embodiment of the present application;
FIG. 13 is a schematic illustration of another polyline for determining a target state of a compressor provided in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context. In addition, when describing a pipeline, the terms "connected" and "connected" as used herein have the meaning of conducting. The specific meaning is to be understood in conjunction with the context.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
In some embodiments, the compressor compresses refrigerant gas in a state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
In some embodiments, the expansion valve expands the liquid-phase refrigerant in a condensed state in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
In some embodiments, the outdoor unit of the air conditioner refers to a portion of the refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and the expansion valve may be provided in the indoor unit or the outdoor unit.
In some embodiments, the indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater for a heating operation mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler for a cooling operation mode.
At present, when the indoor unit is in a return air short-circuit running state, the compressor may be stopped, the frequency is reduced and the like, so that the air conditioner cannot normally run.
Based on this, an embodiment of the present application provides an air conditioner, including: an outdoor unit including an outdoor heat exchanger; the indoor unit comprises an indoor heat exchanger; wherein, the outdoor heat exchanger and the indoor heat exchanger, one works as a condenser, and the other works as an evaporator; the refrigerant circulation loop is used for controlling the refrigerant to circulate in a loop formed by the compressor, the condenser, the expansion valve and the evaporator; the compressor is used for compressing the refrigerant gas and discharging the compressed refrigerant gas to the condenser; the first temperature sensor is arranged at the air return port of the indoor unit and used for detecting the air return temperature at the air return port; the second temperature sensor is arranged at the air outlet of the indoor unit and used for detecting the air outlet temperature at the air outlet; a third temperature sensor for detecting an indoor temperature; a controller configured to: acquiring continuous operation time of a compressor, return air temperature detected by a first temperature sensor, outlet air temperature detected by a second temperature sensor and indoor temperature detected by a third temperature sensor; when the continuous operation duration reaches the preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration, wherein the first difference value is determined when the air conditioner is started; the compressor is controlled to operate in a return air short circuit correction mode.
Therefore, when the indoor unit is in the return air short circuit operation state, the air conditioner is timely controlled to operate in the return air short circuit correction mode, so that the return air short circuit is corrected, the indoor unit is operated according to the working mode expected by a user, and the use comfort of the user is improved.
The embodiments provided in the present application are specifically described below with reference to the drawings attached to the specification.
Fig. 1 is a schematic diagram illustrating an air conditioner according to an embodiment of the present application, and as shown in fig. 1, the air conditioner 1 includes an outdoor unit 2, an indoor unit 3, a remote controller 4, and a controller 1000 (not shown in fig. 1).
In some embodiments, the outdoor unit 2 is typically disposed outdoors for heat exchange in an indoor environment. In fig. 1, the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 across the wall surface WL, and the outdoor unit 2 is indicated by a broken line.
In some embodiments, the indoor unit 3, for example, an indoor unit, is generally mounted on the indoor wall surface WL or the like. For another example, an indoor unit (not shown in fig. 1) is also an indoor unit mode of an indoor unit.
In some embodiments, the remote control 4 has a function of communicating with the controller 1000, for example, using infrared or other communication means. The remote controller 4 is used for various controls of the air conditioner 1 by a user, and interaction between the user and the air conditioner 1 is realized.
Fig. 2 is a schematic structural diagram of a throttling device according to an embodiment of the present application. As shown in fig. 2, the throttle device 21 includes an expansion valve 211. There is a pipe connection between the outdoor unit 2 and the indoor unit 3, and an expansion valve 211 is provided on the pipe between the indoor unit 3 and the outdoor unit 2. The pipeline, namely a gas-liquid pipe, comprises: the gas pipe is used for conveying gaseous refrigerants and the liquid pipe is used for conveying two-phase refrigerants.
In some embodiments, the throttling device 21 is used for adjusting the flow rate of fluid in the air-conditioning gas-liquid pipe and adjusting the flow rate of refrigerant. The expansion valve 211 is used for adjusting the supply amount of the refrigerant in the pipeline. The expansion valve 211 may be independent of the outdoor unit 2.
In some embodiments, the expansion valve 211 may also be attached to a part of the outdoor unit 2 (as shown in fig. 3), and fig. 3 is a schematic structural diagram of another throttling device according to an exemplary embodiment of the present application.
Further, the outdoor unit 2, the throttle device 21, and the indoor unit 3 are all in communication connection with the controller 1000 (not shown in fig. 1), and perform related operations according to instructions of the controller 1000.
Taking a part of the expansion valve 211 belonging to the outdoor unit 2 as an example, fig. 4 is a schematic circuit diagram of an air conditioner according to an embodiment of the present application. As shown in fig. 4, the air conditioner 1 further includes: a refrigerant circuit 10.
In some embodiments, the vapor compression refrigeration cycle can be performed by a refrigerant cycle in the refrigerant circuit 10. The indoor unit 3 and the outdoor unit 2 are connected to each other by a connection pipe to form a refrigerant circuit 10 for circulating a refrigerant.
In some embodiments, the refrigerant circuit 10 includes a compressor 11, an outdoor heat exchanger 13, an expansion valve 211, a receiver 14, and an indoor heat exchanger 15. Wherein the indoor heat exchanger 15 and the outdoor heat exchanger 13 function as a condenser or an evaporator. The compressor 11 sucks in refrigerant from the suction port, and discharges the refrigerant compressed therein from the discharge port to the indoor heat exchanger 15.
In some embodiments, the outdoor heat exchanger 13 has a first inlet and outlet for circulating the refrigerant between the compressor 11 and the suction port via the accumulator 14, and has a second inlet and outlet for circulating the refrigerant between the expansion valve 211. The outdoor heat exchanger 13 exchanges heat between the outdoor air and a refrigerant flowing through a heat transfer pipe (not shown in fig. 4) connected between the second inlet and the first inlet of the outdoor heat exchanger 13.
In some embodiments, the expansion valve 211 is disposed between the outdoor heat exchanger 13 and the indoor heat exchanger 15. The expansion valve 211 has a function of expanding and decompressing the refrigerant flowing between the outdoor heat exchanger 13 and the indoor heat exchanger 15. The expansion valve 211 is configured to be capable of changing the opening degree, and the opening degree is reduced to increase the flow resistance of the refrigerant passing through the expansion valve 211, and the opening degree is increased to decrease the flow resistance of the refrigerant passing through the expansion valve 211. The expansion valve 211 expands and decompresses the refrigerant flowing from the indoor heat exchanger 15 to the outdoor heat exchanger 13 during the heating operation. In addition, even if the state of other devices mounted in the refrigerant circuit 10 is not changed, when the opening degree of the expansion valve 211 is changed, the flow rate of the refrigerant flowing in the refrigerant circuit 10 is changed.
In some embodiments, the indoor heat exchanger 15 has a second inlet and outlet for flowing the liquid refrigerant between the expansion valve 211 and a first inlet and outlet for flowing the gas refrigerant between the discharge port of the compressor 11. The indoor heat exchanger 15 exchanges heat between the indoor air and a refrigerant flowing through a heat transfer pipe (not shown in fig. 4) connected between the second inlet and the first inlet of the indoor heat exchanger 15.
In some embodiments, a reservoir 14 is disposed between the outdoor heat exchanger 13 and the suction inlet of the compressor 11. In the accumulator 14, the refrigerant flowing from the outdoor heat exchanger 13 to the compressor 11 is separated into a gas refrigerant and a liquid refrigerant. The gas refrigerant is mainly supplied from the accumulator 14 to the suction port of the compressor 11.
In some embodiments, the outdoor unit 2 further includes an outdoor fan 22, and the outdoor fan 22 generates an airflow of the outdoor air passing through the outdoor heat exchanger 13 to promote heat exchange between the refrigerant flowing in the heat transfer pipe (not shown in fig. 4) and the outdoor air. The outdoor fan 22 is driven by an outdoor fan motor 22A capable of changing the rotational speed.
In some embodiments, the indoor unit 3 is provided with an indoor fan 31, and the indoor fan 31 generates an airflow of the indoor air passing through the indoor heat exchanger 15 to promote heat exchange between the refrigerant flowing in the heat transfer pipe (not shown in fig. 4) and the indoor air. The indoor fan 31 is driven by an indoor fan motor 31A capable of changing the rotational speed.
Fig. 5 is a schematic diagram of a setting position of a temperature sensor according to an embodiment of the present application. As shown in fig. 5, the indoor unit 3 is provided with a first temperature sensor 32 and a second temperature sensor 33.
In some embodiments, the first temperature sensor 32 is disposed at a return air inlet of the indoor unit 3, and is configured to detect a return air temperature at the return air inlet.
In some embodiments, the first temperature sensor 33 is disposed at an air outlet of the indoor unit 3, and is configured to detect an air outlet temperature at the air outlet.
In the embodiment shown in the present application, the controller 1000 refers to a device that can generate an operation control signal instructing the air conditioner 1 to execute a control instruction according to an instruction operation code and a timing signal. By way of example, the controller 1000 may be a central processing unit (central processing unit, CPU), a general purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, a programmable logic device (programmable logic device, PLD), or any combination thereof. The controller 1000 may also be any other device having a processing function, such as a circuit, a device, or a software module, which is not limited in any way by the embodiments of the present application.
Further, the controller 1000 may be used to control various components in the inside of the air conditioner 1 such that the various components operate to achieve various predetermined functions of the air conditioner 1.
Fig. 6 is a hardware configuration block diagram of the air conditioner 1 provided according to the exemplary embodiment of the present application. As shown in fig. 6, the air conditioner 1 may further include two items: memory 1002 and communicator 1003.
Memory 1002 may be used to store software programs and data. The controller 1000 performs various functions and data processing of the air conditioner 1 by running software programs or data stored in the memory 1002. The memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. The memory 1002 stores an operating system that enables the air conditioner 1 to operate. The memory 1002 in the present application may store an operating system and various application programs, and may also store codes for executing the control method of the air conditioner 1 provided in the embodiment of the present application.
In some embodiments, the communicator 1003 is configured to establish a communication connection with other network entities, such as with a terminal device. The communicator 1003 may include a Radio Frequency (RF) module, a cellular module, a wireless fidelity (wireless fidelity, WIFI) module, a GPS module, and the like. Taking an RF module as an example, the RF module may be used for receiving and transmitting signals, in particular, transmitting received information to the controller 1000 for processing; in addition, the signal generated by the controller 1000 is transmitted. Typically, the RF circuitry may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (low noise amplifier, LNA), a duplexer, and the like.
It will be appreciated by those skilled in the art that the hardware configuration shown in fig. 6 is not limiting of the present air conditioner 1, and that the air conditioner 1 may include more or less components than illustrated, or certain components may be combined, or different arrangements of components.
Fig. 7 is a flowchart of a control method of an air conditioner according to an embodiment of the present application. As shown in fig. 7, the method includes:
s101, the controller acquires the continuous operation time length, the return air temperature, the air outlet temperature and the indoor temperature of the compressor.
Optionally, the controller may periodically obtain the duration, the return air temperature, the outlet air temperature, and the indoor temperature of the compressor for a first preset duration until the duration of the compressor reaches the preset duration.
It should be noted that, the first preset duration is preset by the air conditioner manufacturer and is pre-stored in the memory, and the first preset durations of different manufacturers may be changed, which is not limited in this application.
Alternatively, the compressor is of the variable frequency compressor or fixed speed compressor type.
In some embodiments, the duration of operation of the compressor may be different when the air conditioner is in different modes of operation.
When the air conditioner is operated in the cooling operation mode or the heating operation mode, the compressor needs to be operated for a period of time to compress the refrigerant gas and then discharge the compressed refrigerant gas to the condenser, so that the heating or cooling effect of the air conditioner is achieved.
Alternatively, the controller may obtain the return air temperature through the first temperature sensor, the outlet air temperature through the second temperature sensor, and the indoor temperature through the third temperature sensor.
It should be noted that, when the air conditioner is in the state of short-circuit operation of return air, the frequency of the demand sent to the compressor by the indoor unit is reduced, the compressor may be directly stopped, and at this time, the indoor temperature does not reach the set temperature, which may result in poor user experience. Therefore, when the air conditioner is in a return air short-circuit operation state, the frequency and the state of the compressor are required to be adjusted through the acquired return air temperature, the acquired air outlet temperature and the acquired indoor temperature, so that the normal operation of the air conditioner is realized.
And S102, when the continuous operation duration of the compressor reaches a preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, the controller determines that the air conditioner is in a return air short-circuit operation state.
The difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration between the return air temperature and the outlet air temperature.
Optionally, the first difference may be a difference between the return air temperature and the outlet air temperature obtained by the controller when the air conditioner is started. The second difference may be a difference between the return air temperature and the outlet air temperature obtained by the controller when the duration of the operation of the compressor reaches a preset duration.
It should be noted that, the preset duration, the first preset threshold value, and the second preset threshold value are preset by the air conditioner manufacturer and are preset in the memory, and the preset duration, the first preset threshold value, and the second preset threshold value of different manufacturers can be changed, which is not limited in this application.
Alternatively, the preset duration may range from 120 seconds to 180 seconds. The first preset threshold may be 2. The second preset threshold may be 3.
In some embodiments, when the air conditioner starts to operate in the cooling operation mode, i.e. the duration of operation of the compressor does not reach the preset duration (e.g. 60 seconds), the return air temperature is greater than the outlet air temperature, and the return air temperature T is detected by the first temperature sensor i1 Detecting the air outlet temperature T by a second temperature sensor o1 Return air temperature T i1 With air-out temperature T o1 First difference T between the two at the starting time of the air conditioner 1 The calculation method of (2) is shown in the formula (1):
T 1 ＝T i1 -T o1 Formula (1)
Further, when the continuous operation duration of the compressor reaches a preset duration (for example, 150 seconds), the first temperature sensor detects the return air temperature T i2 By means ofThe second temperature sensor detects the temperature T of the air outlet o2 At this time return air temperature T i2 With air-out temperature T o2 First difference T between 2 The calculation method of (2) is shown in the formula:
T 2 ＝T i2 -T o2 formula (2)
Further, the difference between the return air temperature and the outlet air temperature is changed by a value T d1 The calculation method of (2) is shown in the formula (3):
T d1 ＝T 1 -T 2 formula (3)
At this time, return air temperature T i2 And the indoor temperature T r Difference T between n1 The calculation method is shown in the formula (4):
T n1 ＝|T i2 -T r i formula (4)
In some embodiments, when the air conditioner is in the cooling mode, if the difference between the return air temperature and the outlet air temperature is changed by a value T d1 Is smaller than a first preset threshold value and the return air temperature T i2 And the indoor temperature T r Difference T between n1 And when the air conditioner is larger than a second preset threshold value, the controller determines that the air conditioner is in a return air short-circuit running state.
Exemplary, when the air conditioner is operated in the cooling operation mode, if the duration of the operation of the compressor reaches 150 seconds, if T d1 < 2 and T n1 And 3, the controller determines that the air conditioner is in a return air short circuit operation state.
In some embodiments, when the air conditioner starts to operate in the heating operation mode, that is, when the duration of operation of the compressor does not reach the preset duration (for example, 60 seconds), the return air temperature is less than the outlet air temperature, and the return air temperature T is detected by the first temperature sensor i3 Detecting the air outlet temperature T by a second temperature sensor o3 Return air temperature T i3 With air-out temperature T o3 First difference T between the two at the starting time of the air conditioner 3 The calculation method of (2) is shown in the formula (5):
T 3 ＝T o3 -T i3 formula (5)
Further, when the continuous operation duration of the compressor reaches a preset duration (for example, 150 seconds), the first temperature sensor detects the return air temperature T i4 Detecting the air outlet temperature T by a second temperature sensor o4 Return air temperature T i4 With air-out temperature T o4 Second difference T between 2 The calculation method of (2) is shown in the formula (6):
T 4 ＝T o4 -T i4 formula (6)
Further, the difference between the return air temperature and the outlet air temperature is changed by a value T d2 The calculation method of (2) is shown in the formula (7):
T d2 ＝T 3 -T 3 formula (7)
At this time, return air temperature T i2 And the indoor temperature T r Difference T between n2 The calculation method is shown in the formula (8):
T n2 ＝|T i4 -T r i formula (8)
In some embodiments, when the air conditioner is in the heating mode, if the difference between the return air temperature and the outlet air temperature is changed by the value T d2 Is smaller than a first preset threshold value and the return air temperature T i2 And the indoor temperature T r Difference T between n2 And when the air conditioner is larger than a second preset threshold value, the controller determines that the air conditioner is in a return air short-circuit running state.
Exemplary, when the air conditioner is operated in the cooling operation mode, if the duration of the operation of the compressor reaches 150 seconds, if T d2 < 2 and T n2 And 3, the controller determines that the air conditioner is in a return air short circuit operation state.
S103, in some embodiments, when the duration of the compressor does not reach the preset duration, and/or when the difference between the return air temperature and the outlet air temperature changes by a value T d When the temperature is greater than or equal to a first preset threshold value and/or when the difference T between the return air temperature and the indoor temperature n When the preset threshold value is smaller than or equal to the second preset threshold value, the controller determines that the air conditioner is not usedIn a return air short circuit operation state.
Exemplary, when the duration of the compressor operation is less than 150 seconds, and/or, when T d When not less than 2, and/or when T n And when the temperature is less than or equal to 3, the controller determines that the air conditioner is not in a return air short-circuit running state.
In some embodiments, when the controller determines that the air conditioner is not in a return air short-circuit operation state, the controller controls the compressor to continue to operate in a current state.
And S104, when the air conditioner is in a return air short circuit operation state, the controller controls the compressor to operate in a return air short circuit correction mode.
The return air short circuit correction mode is used for correcting the running frequency of the compressor or the state of the compressor when the air conditioner is in a return air short circuit running state.
It should be noted that, when the air conditioner is in the state of short-circuit operation of return air, if the operation parameters of the compressor are not adjusted, the frequency of the demand sent to the compressor by the indoor unit is reduced, and the compressor may be directly stopped. At this time, the indoor temperature does not reach the set temperature, which may result in poor user experience. Therefore, when the air conditioner is in the return air short circuit operation state, the operation parameters of the compressor are corrected, and the compressor is controlled to operate in the return air short circuit correction mode.
In some embodiments, when the air conditioner is in the return air short-circuit operation state, if the compressor is a variable frequency compressor, the compressor is controlled according to the set temperature T s And indoor temperature T r A target frequency f of the compressor is determined.
Optionally, the method for calculating the operating frequency f of the compressor is adjusted as shown in formula (9):
f＝k*(T r -T s ) Formula (9)
Where k is a constant.
It should be noted that k is set by the air conditioner manufacturer and is pre-stored in the memory, and k of different manufacturers may vary, which is not limited in this application.
Alternatively, k may be in the range of [20,130].
In some embodiments, after the air conditioner is operated in the return air short circuit correction mode for a period of time, if the air conditioner is no longer in the return air short circuit operation state, and the compressor is a variable frequency compressor, according to the return air temperature T i And a set temperature T s A target frequency f of the compressor is determined.
Optionally, the method for calculating the target frequency f of the compressor is as shown in formula (10):
f＝k*(T i -T s ) Formula (10)
In some embodiments, the controller adjusts the operating frequency of the compressor to the target frequency after the target frequency of the compressor is determined.
In some embodiments, when the air conditioner is in a return air short-circuit operation state, if the type of the compressor is a constant speed compressor, the compressor is controlled to enter a target state according to the operation mode of the air conditioner and the indoor temperature.
The target states include a start-up state and a stop state.
The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: according to the technical scheme, whether the air conditioner enters the return air short-circuit operation state or not is judged through the continuous operation time of the compressor, the return air temperature of the indoor unit, the air outlet temperature and the indoor temperature, and the judging method is timely and accurate. Meanwhile, after the air conditioner is determined to enter the return air short circuit operation state, the air conditioner is controlled to operate in a return air short circuit correction mode, so that the frequency or state of the compressor is corrected, the air conditioner is operated according to a working mode expected by a user, the use comfort of the user is improved, and the air conditioning effect of the air conditioner is improved.
As described above, when the air conditioner is in the return air short-circuit operation state, if the type of the compressor is a constant speed compressor, it is necessary to determine a target state of the compressor according to an operation mode of the air conditioner and an indoor temperature. Fig. 8 is a flowchart of a method for determining a target state of a compressor according to an embodiment of the present application. As shown in fig. 8, the method includes:
S104A1, when the operation mode of the air conditioner is a refrigeration operation mode and the type of the compressor is a constant-speed compressor, controlling the compressor to enter a starting state under the condition that the indoor temperature is greater than or equal to a preset temperature range.
It should be noted that the preset temperature range is preset by the air conditioner manufacturer and is pre-stored in the memory, and the preset temperature ranges of different manufacturers can be changed, which is not limited in this application.
Alternatively, the preset temperature range may be [ T ] s ，T s +2]. Wherein T is s Is the set temperature.
In some embodiments, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode, the temperature T is the indoor temperature r And under the condition that the temperature is greater than or equal to a preset temperature range, controlling the compressor to enter a starting state.
Exemplary, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode, at T r ≥T s And under the condition of +2, controlling the compressor to enter a starting state.
S104A2, controlling the compressor to enter a stop state under the condition that the indoor temperature is smaller than a preset temperature range.
Exemplary, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode, at T r ＜T s In the case of (2), the compressor is controlled to enter a stopped state.
And S104A3, controlling the compressor to keep the current state under the condition that the indoor temperature is within the preset temperature range.
Exemplary, when the air conditioner is in the return air short-circuit operation state, if the operation mode of the air conditioner is the cooling operation mode and the current operation state of the compressor is the on state, at T s ≤T r ＜T s In the case of +2, the compressor is controlled to maintain a start-up state.
Exemplary, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode and the current operation state of the compressor is the shutdown state, at T s ≤T r ＜T s In the case of +2, the compressor is controlled to maintain a stopped state.
In some embodiments, the above-described determination of the compressor target state may also be represented by a line graph as shown in FIG. 9.
In some embodiments, after the air conditioner is operated in the return air short circuit correction mode for a period of time, if the air conditioner is no longer in the return air short circuit operation state, the determination of the target state of the compressor is shown in fig. 10.
Exemplary, when the air conditioner is no longer in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode, at T i ≥T s And under the condition of +2, controlling the compressor to enter a starting state.
Exemplary, when the air conditioner is no longer in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode, at T i ＜T s In the case of (2), the compressor is controlled to enter a stopped state.
Exemplary, when the air conditioner is no longer in the return air short-circuit operation state, if the operation mode of the air conditioner is the cooling operation mode and the current operation state of the compressor is the on state, at T s ≤T i ＜T s In the case of +2, the compressor is controlled to maintain a start-up state.
Exemplary, when the air conditioner is no longer in the return air short circuit operation state, if the operation mode of the air conditioner is the cooling operation mode and the current operation state of the compressor is the shutdown state, at T s ≤T i ＜T s In the case of +2, the compressor is controlled to maintain a stopped state.
Fig. 11 is a flowchart of another method for determining a target state of a compressor according to an embodiment of the present application. As shown in fig. 11, the method includes:
S104B1, when the operation mode of the air conditioner is a heating operation mode and the type of the compressor is a constant-speed compressor, controlling the compressor to enter a starting state under the condition that the indoor temperature is less than or equal to a preset temperature range.
In some embodiments, when the air conditioner is in the return air short circuit operation state, if the air conditionerThe operation mode is a heating operation mode, and the indoor temperature T r And under the condition that the temperature is less than or equal to a preset temperature range, controlling the compressor to enter a starting state.
Exemplary, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the heating operation mode, at T r ≤T s And (3) controlling the compressor to enter a starting state.
S104B2, controlling the compressor to enter a stop state under the condition that the indoor temperature is greater than or equal to a preset temperature range.
In some embodiments, when the air conditioner is in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode, the temperature T is the indoor temperature r And under the condition that the temperature is greater than or equal to a preset temperature range, controlling the compressor to enter a stop state.
Exemplary, when the air conditioner is in the return air short circuit operation state, if the operation mode of the air conditioner is the heating operation mode, at T r ≥T s In the case of +2, the compressor is controlled to enter a stopped state.
And S104B3, controlling the compressor to keep the current state under the condition that the indoor temperature is within the preset temperature range.
In some embodiments, when the air conditioner is in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode, the temperature T is the indoor temperature r And under the condition that the temperature is within the preset temperature range, controlling the compressor to keep the current state.
Exemplary, when the air conditioner is in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode and the current operation state of the compressor is the on state, at T s ＜T r ＜T s In the case of +2, the compressor is controlled to maintain a start-up state.
Exemplary, when the air conditioner is in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode and the current operation state of the compressor is the shutdown state, at T s ＜T r ＜T s In the case of +2, the compressor is controlled to maintain a stopped state.
In some embodiments, the above-described determination of the compressor target state may also be represented by a line graph as shown in FIG. 12.
In some embodiments, after the air conditioner is operated in the return air short circuit correction mode for a period of time, if the air conditioner is no longer in the return air short circuit operation state, the determination of the target state of the compressor is shown in fig. 13.
For example, when the air conditioner is no longer in the return air short circuit operation state, if the operation mode of the air conditioner is the heating operation mode, at T i ≤T s And (3) controlling the compressor to enter a starting state.
For example, when the air conditioner is no longer in the return air short circuit operation state, if the operation mode of the air conditioner is the heating operation mode, at T i ≥T s In the case of +2, the compressor is controlled to enter a stopped state.
Exemplary, when the air conditioner is no longer in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode and the current operation state of the compressor is the on state, at T s ＜T i ＜T s In the case of +2, the compressor is controlled to maintain a start-up state.
Exemplary, when the air conditioner is no longer in the return air short-circuit operation state, if the operation mode of the air conditioner is the heating operation mode and the current operation state of the compressor is the shutdown state, at T s ＜T i ＜T s In the case of +2, the compressor is controlled to maintain a stopped state.
Embodiments of the present invention also provide a computer-readable storage medium including computer-executable instructions that, when executed on a computer, cause the computer to perform a method as provided in the above embodiments.
The embodiment of the present invention also provides a computer program product, which can be directly loaded into a memory and contains software codes, and the computer program product can implement the method provided by the above embodiment after being loaded and executed by a computer.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely exemplary, and for example, the division of modules or units is merely a logical function division, and other manners of division may be implemented in practice. For example, multiple units or components may be combined or may be integrated into another device, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units. The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An air conditioner, comprising:
an outdoor unit including an outdoor heat exchanger;
the indoor unit comprises an indoor heat exchanger; wherein one of the outdoor heat exchanger and the indoor heat exchanger works as a condenser, and the other works as an evaporator;
the refrigerant circulation loop is used for controlling the refrigerant to circulate in a loop formed by the compressor, the condenser, the expansion valve and the evaporator;
the compressor is used for compressing the refrigerant gas and discharging the compressed refrigerant gas to the condenser;
the first temperature sensor is arranged at the air return port of the indoor unit and used for detecting the air return temperature at the air return port;
the second temperature sensor is arranged at the air outlet of the indoor unit and used for detecting the air outlet temperature at the air outlet;
a third temperature sensor for detecting an indoor temperature;
a controller configured to:
acquiring the continuous operation time of the compressor, the return air temperature detected by the first temperature sensor, the air outlet temperature detected by the second temperature sensor and the indoor temperature detected by the third temperature sensor;
when the continuous operation duration reaches a preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration, wherein the first difference value is determined when the air conditioner is started, and the second difference value is determined when the continuous operation duration reaches a preset duration;
Controlling the compressor to operate in a return air short circuit correction mode; the return air short circuit correction mode is used for correcting the running frequency of the compressor or the state of the compressor when the air conditioner is in a return air short circuit running state.
2. An air conditioner according to claim 1, wherein the type of compressor comprises a variable frequency compressor or a constant speed compressor.
3. The air conditioner of claim 2, wherein the controller is configured to control the compressor to operate in a return air short circuit correction mode, and is specifically configured to:
if the type of the compressor is a variable frequency compressor, determining a target frequency according to the indoor temperature and the set temperature;
and adjusting the operating frequency of the compressor to the target frequency.
4. The air conditioner of claim 2, wherein the controller is configured to control the compressor to operate in a return air short circuit correction mode, and is specifically configured to:
if the type of the compressor is a constant speed compressor, controlling the compressor to enter a target state according to the running mode of the air conditioner and the indoor temperature; wherein the target state includes a start-up state and a shut-down state.
5. The air conditioner according to claim 4, wherein the controller is configured to control the compressor to enter a target state according to an operation mode of the air conditioner and the indoor temperature, and is specifically configured to:
if the operation mode of the air conditioner is a refrigeration operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is greater than or equal to a maximum temperature value in a preset temperature range; or alternatively, the process may be performed,
controlling the compressor to enter a shutdown state under the condition that the indoor temperature is smaller than the minimum temperature value in the preset temperature range; or alternatively, the process may be performed,
and controlling the compressor to keep the current state under the condition that the indoor temperature is within the preset temperature range.
6. The air conditioner according to claim 4, wherein the controller is configured to control the compressor to enter a target state according to an operation mode of the air conditioner and the indoor temperature, and is specifically configured to:
if the operation mode of the air conditioner is a heating operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is smaller than or equal to a minimum temperature value in a preset temperature range; or alternatively, the process may be performed,
Controlling the compressor to enter a shutdown state under the condition that the indoor temperature is greater than or equal to a maximum temperature value in the preset temperature range; or alternatively, the process may be performed,
and under the condition that the indoor temperature is within the preset temperature range, controlling the compressor to keep the current running state.
7. The air conditioner of claim 1, wherein the controller is further configured to:
when the duration of operation does not reach the preset duration, and/or,
when the variation value of the difference between the return air temperature and the outlet air temperature is greater than or equal to a first preset threshold value, and/or,
and when the difference value between the return air temperature and the indoor temperature is smaller than or equal to a second preset threshold value, determining that the air conditioner is not in a return air short-circuit operation state.
8. A control method of an air conditioner, the method comprising:
acquiring the continuous operation time length, the return air temperature, the air outlet temperature and the indoor temperature of the compressor;
when the continuous operation duration reaches a preset duration, if the change value of the difference value between the return air temperature and the air outlet temperature is smaller than a first preset threshold value, and the difference value between the return air temperature and the indoor temperature is larger than a second preset threshold value, determining that the air conditioner is in a return air short-circuit operation state; the difference value change value is used for indicating a change value between a first difference value determined when the air conditioner is started and a second difference value determined when the continuous operation duration reaches a preset duration, wherein the first difference value is determined when the air conditioner is started, and the second difference value is determined when the continuous operation duration reaches a preset duration;
Controlling the compressor to operate in a return air short circuit correction mode; the return air short circuit correction mode is used for correcting the running frequency of the compressor or the state of the compressor when the air conditioner is in a return air short circuit running state.
9. The method of claim 8, wherein the method further comprises:
if the operation mode of the air conditioner is a refrigeration operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is greater than or equal to the maximum temperature value in the preset temperature range; or alternatively, the process may be performed,
controlling the compressor to enter a shutdown state under the condition that the indoor temperature is smaller than the minimum temperature value in the preset temperature range; or alternatively, the process may be performed,
and under the condition that the indoor temperature is within the preset temperature range, controlling the compressor to keep the current running state.
10. The method of claim 8, wherein the method further comprises:
if the operation mode of the air conditioner is a heating operation mode, controlling the compressor to enter a starting state under the condition that the indoor temperature is smaller than or equal to the minimum temperature value in the preset temperature range; or alternatively, the process may be performed,
Controlling the compressor to enter a shutdown state under the condition that the indoor temperature is greater than or equal to a maximum temperature value in the preset temperature range; or alternatively, the process may be performed,
and under the condition that the indoor temperature is within the preset temperature range, controlling the compressor to keep the current running state.
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