Air conditioner

Abstract

The air conditioner comprises a controller, and the controller is configured to: when a temperature control shutdown signal is received, record a first pressure value corresponding to a compressor at this time of temperature control shutdown; determine a target pressure value of the compressor after this time of temperature control shutdown according to the first pressure value and a preset pressure value; control the compressor to operate according to the target pressure value after this time of temperature control shutdown, and monitor whether the outdoor unit does not receive a temperature control startup signal within a preset time; control the operation state of the compressor according to the monitoring result and adjust the target pressure value of the compressor after the next time of temperature control shutdown, and control the compressor to operate according to the target pressure value of the compressor after the next time of temperature control shutdown, so that the start-stop frequency of the compressor is reduced, the operation of the compressor is smoother, the increase of energy consumption and equipment wear caused by unstable operation of the compressor are reduced, and the effects of energy saving and prolonging the service life of the compressor are achieved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioner. Background Technology

[0002] Currently, some air conditioners on the market lack communication capabilities. These air conditioners only send electrical signals to the indoor and outdoor units via a wired controller to control their start and stop. For example, after receiving the start signal, the indoor and outdoor units operate according to their respective control logic. The outdoor unit cannot obtain information from the indoor unit, and the compressor can only operate at a preset frequency. This can lead to frequent start and stop of the compressor, resulting in increased energy consumption and a shortened compressor lifespan.

[0003] In existing technologies, on the one hand, the operating frequency of the compressor after the next temperature control start-up can be controlled based on the compressor's working time and operating frequency before the temperature control shutdown. However, this method cannot guarantee accurate adjustment of the indoor temperature and frequent start-up and shutdown will still occur. On the other hand, the compressor's operating status can be controlled according to the target pressure. However, under this control method, how to improve the compressor's smoother and more energy-efficient operation has become an urgent problem to be solved. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, one objective of this invention is to provide an air conditioner that can reduce the frequency of compressor start-stop, making the compressor run more smoothly, thereby reducing the increase in energy consumption and equipment wear caused by unstable compressor operation, achieving the effects of energy saving and extending the service life of the compressor.

[0006] Therefore, a second objective of this invention is to provide a control method for an air conditioner.

[0007] To achieve the above objectives, an embodiment of the first aspect of the present invention provides an air conditioner, comprising: an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit form a refrigerant circulation system through a connecting pipe, so that the refrigerant circulates in a loop consisting of a compressor, a four-way valve, a condenser, a throttling device, and an evaporator, wherein one of the condenser and the evaporator is an outdoor heat exchanger and the other is an indoor heat exchanger.

[0008] The wired controller is used to send a temperature control start signal or a temperature control shutdown signal to the outdoor unit;

[0009] A pressure sensor is used to detect the pressure value corresponding to the compressor;

[0010] The controller is configured to:

[0011] record a first pressure value corresponding to the compressor when the temperature control shutdown signal is received this time;

[0012] determine a target pressure value of the compressor after the temperature control shutdown this time according to the first pressure value and a preset pressure value;

[0013] control the compressor to operate according to the target pressure value of the compressor after the temperature control shutdown this time, and monitor whether the outdoor unit receives the temperature control startup signal within a preset time;

[0014] control the operating state of the compressor according to the monitoring result, and adjust the target pressure value of the compressor after the next temperature control shutdown, and control the compressor to operate according to the target pressure value of the compressor after the next temperature control shutdown.

[0015] According to the air conditioner of the embodiment of the present application, after the outdoor unit receives the temperature control shutdown signal, the target pressure of the compressor after the temperature control shutdown this time can be reasonably set through the pressure of the compressor when the temperature control shutdown, the operating state of the compressor is controlled according to the monitoring result of the temperature control startup signal within a preset time, and the target pressure after the next temperature control shutdown is dynamically adjusted, so as to control the compressor to operate according to the target pressure value of the compressor after the next temperature control shutdown, realize the effect of step-by-step gradient operation of the compressor from high frequency to low frequency, reduce the start-stop frequency of the compressor, make the operation of the compressor more smooth, reduce the problems of energy consumption increase and equipment wear caused by unstable operation of the compressor, and achieve the effects of energy saving and prolonging the service life of the compressor.

[0016] In some embodiments, the preset pressure value includes a first preset pressure value, and in the heating operation mode, a difference between the first pressure value and the first preset pressure value is the target pressure value of the compressor after the temperature control shutdown this time.

[0017] The above technical solution has the following beneficial effects: by reasonably reducing the pressure value of the compressor after the temperature control shutdown, the reasonable frequency reduction of the compressor can be realized, so as to reduce the start-stop frequency of the compressor, make the operation of the compressor more smooth, reduce the problems of energy consumption increase and equipment wear caused by unstable operation of the compressor, and prolong the service life of the compressor.

[0018] In some embodiments, in the heating operation mode, if the temperature control startup signal is not received within a preset time, the compressor is directly controlled to shut down, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to be a sum of the target pressure value of the compressor after the temperature control shutdown this time and a second preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is less than the first pressure value.

[0019] The above technical scheme has the following beneficial effects: according to the monitoring result, the running state of the compressor is controlled, energy can be saved and unnecessary mechanical wear and tear can be reduced, and the service life of the compressor is prolonged; meanwhile, by adjusting the target pressure of the compressor after the next temperature control shutdown, reasonable frequency reduction of the compressor can be realized, the start-stop frequency of the compressor is reduced, the compressor runs more smoothly, the problems of energy consumption increase and equipment wear and tear caused by unstable operation of the compressor are reduced, and the service life of the compressor is prolonged.

[0020] In some embodiments, in the heating operation mode, if the temperature control start signal is received within a preset time, the compressor is controlled to run in a frequency range determined according to actual heating demand, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to be a difference between the target pressure value of the compressor after the current temperature control shutdown and a third preset pressure value.

[0021] The above technical scheme has the following beneficial effects: according to the monitoring result, the running state of the compressor is controlled, energy can be saved and unnecessary mechanical wear and tear can be reduced, and the service life of the compressor is prolonged; meanwhile, by adjusting the target pressure of the compressor after the next temperature control shutdown, reasonable frequency reduction of the compressor can be realized, the start-stop frequency of the compressor is reduced, the compressor runs more smoothly, the problems of energy consumption increase and equipment wear and tear caused by unstable operation of the compressor are reduced, and the service life of the compressor is prolonged.

[0022] In some embodiments, the preset pressure value includes a fourth preset pressure value, and in the refrigeration operation mode, a sum of the first pressure value and the fourth preset pressure value is determined as the target pressure value of the compressor after the current temperature control shutdown.

[0023] The above technical scheme has the following beneficial effects: by reasonably increasing the pressure value of the compressor after temperature control shutdown, reasonable frequency reduction of the compressor can be realized, the start-stop frequency of the compressor is reduced, the compressor runs more smoothly, the problems of energy consumption increase and equipment wear and tear caused by unstable operation of the compressor are reduced, and the effects of energy saving and prolonging the service life of the compressor are achieved.

[0024] In some embodiments, in the refrigeration operation mode, if the temperature control start signal is not received within a preset time, the compressor is directly controlled to shut down, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to be a difference between the target pressure value of the compressor after the current temperature control shutdown and a fifth preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is greater than the first pressure value.

[0025] The above technical scheme has the following beneficial effects: according to the monitoring result, the running state of the compressor is controlled, energy can be saved and unnecessary mechanical wear and tear can be reduced, and the service life of the compressor is prolonged; at the same time, by adjusting the target pressure of the compressor after the next temperature control shutdown, reasonable frequency reduction of the compressor can be realized, the start-stop frequency of the compressor is reduced, the compressor runs more smoothly, the problems of increased energy consumption and equipment wear and tear caused by unstable operation of the compressor are reduced, the effects of energy saving and prolonging the service life of the compressor are achieved.

[0026] In some embodiments, in the refrigeration operation mode, if the temperature control start signal is received within a preset time, the compressor is controlled to run within a frequency range determined according to actual heating demand, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to be the sum of the target pressure value of the compressor after the current temperature control shutdown and a sixth preset pressure value.

[0027] The above technical scheme has the following beneficial effects: according to the monitoring result, the running state of the compressor is controlled, the indoor temperature can be ensured to quickly and smoothly reach the set value of the user, at the same time, by adjusting the target pressure of the compressor after the next temperature control shutdown, reasonable frequency reduction of the compressor can be realized, the start-stop frequency of the compressor is reduced, the compressor runs more smoothly, the problems of increased energy consumption and equipment wear and tear caused by unstable operation of the compressor are reduced, the effects of energy saving and prolonging the service life of the compressor are achieved.

[0028] In some embodiments, when the first pressure value corresponding to the compressor at the current temperature control shutdown is recorded, the controller is configured to: obtain the running mode of the air conditioner; and record the first pressure value according to the running mode of the air conditioner.

[0029] The above technical scheme has the following beneficial effects: by recording different pressure values in different modes, the calculated target pressure value can be more accurate, so as to realize accurate control of the compressor, reduce the start-stop frequency of the compressor, make the compressor run more smoothly, reduce the problems of increased energy consumption and equipment wear and tear caused by unstable operation of the compressor, and achieve the effects of energy saving and prolonging the service life of the compressor.

[0030] In some embodiments, when the first pressure value is recorded according to the running mode of the air conditioner, the controller is configured to: when the running mode of the air conditioner is a heating operation mode, record the discharge pressure value of the compressor as the first pressure value; and when the running mode of the air conditioner is a refrigeration operation mode, record the suction pressure value of the compressor as the first pressure value.

[0031] The technical scheme has the following beneficial effects: through the different pressure values recorded in the refrigeration operation mode and the heating operation mode, the target pressure values in different modes can be calculated, so as to realize accurate control of the compressor in different modes, reduce the start-stop frequency of the compressor, make the compressor run more smoothly, reduce the problems of energy consumption increase and equipment wear caused by unstable operation of the compressor, and achieve the effects of energy saving and prolonging the service life of the compressor.

[0032] In some embodiments, after receiving the temperature control shutdown signal, the controller is further configured to: when it is judged that the condition for entering the temperature control shutdown adjustment is met, record the first pressure value corresponding to the compressor at this time of temperature control shutdown, otherwise, do not record the first pressure value corresponding to the compressor at this time of temperature control shutdown, and directly control the compressor to stop, wherein the condition for entering the temperature control shutdown adjustment includes that the temperature control shutdown signal is a preset alternating current signal, the number of times of receiving the temperature control shutdown signal is greater than a preset number of times, and the compressor frequency before the last temperature control shutdown in the preset number of times is greater than a preset frequency threshold.

[0033] The technical scheme has the following beneficial effects: by setting strict conditions for entering the temperature control shutdown adjustment, fine control of the compressor after temperature control shutdown is realized, so as to further reduce the start-stop frequency of the compressor, make the compressor run more smoothly, reduce the problems of energy consumption increase and equipment wear caused by unstable operation of the compressor, and achieve the effects of energy saving and prolonging the service life of the compressor.

[0034] In order to achieve the above-mentioned purpose, the embodiment of the second aspect of the present application proposes a control method of an air conditioner, which comprises the following steps: when the temperature control shutdown signal is received, recording the first pressure value corresponding to the compressor at this time of temperature control shutdown; determining the target pressure value of the compressor after this time of temperature control shutdown according to the first pressure value and a preset pressure value; controlling the compressor to run according to the target pressure value after this time of temperature control shutdown, and monitoring whether the compressor satisfies that the temperature control startup signal is not received within a preset time; according to the monitoring result, controlling the running state of the compressor and adjusting the target pressure value of the compressor after the next time of temperature control shutdown, and controlling the compressor to run according to the target pressure value of the compressor after the next time of temperature control shutdown.

[0035] According to the control method of the air conditioner, after the outdoor unit receives the temperature control shutdown signal, the target pressure of the compressor after this time of temperature control shutdown can be reasonably set according to the pressure corresponding to the compressor at the time of temperature control shutdown, the running state of the compressor can be controlled according to the monitoring result of the temperature control startup signal within the preset time, and the target pressure after the next time of temperature control shutdown is dynamically adjusted, so that the compressor is controlled to run according to the target pressure value of the compressor at the next time of temperature control shutdown after the next time of temperature control shutdown, the effect of step-by-step gradient running of the compressor from high frequency to low frequency is realized, the start-stop frequency of the compressor is reduced, the running of the compressor is smoother, the increase of energy consumption and equipment wear caused by unstable running of the compressor are reduced, the effects of energy saving and prolonging the service life of the compressor are achieved.

[0036] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, in which:

[0038] Figure 1 is a schematic diagram of a refrigeration cycle system of an air conditioner according to an embodiment of the present application;

[0039] Figure 2 is a schematic diagram of the structure of an air conditioner according to an embodiment of the present application;

[0040] Figure 3 is a schematic diagram of the structure of a controller according to an embodiment of the present application;

[0041] Figure 4 is a schematic diagram of the structure of an air conditioner according to another embodiment of the present application;

[0042] Figure 5 is a flowchart of a control method of an air conditioner according to an embodiment of the present application;

[0043] Figure 6 is a flowchart of determining the target pressure value of the compressor after this time of temperature control shutdown according to the first pressure value and the preset pressure value according to an embodiment of the present application;

[0044] Figure 7 is a flowchart of controlling the running state of the compressor according to the monitoring result and adjusting the target pressure value of the compressor after the next time of temperature control shutdown according to an embodiment of the present application;

[0045] Figure 8is a flowchart of controlling the operation state of the compressor according to the monitoring result and adjusting the target pressure value of the compressor after the next temperature control shutdown according to another embodiment of the present application;

[0046] Figure 9 is a flowchart of recording the first pressure value corresponding to the compressor at the time of the current temperature control shutdown according to an embodiment of the present application;

[0047] Figure 10 is a flowchart of recording the first pressure value according to the operation mode of the air conditioner according to an embodiment of the present application;

[0048] Figure 11 is a flowchart of a control method of an air conditioner according to another embodiment of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] The terms "first", "second", "third", etc. are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0052] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] As Figure 1 shown, the air conditioner 1 in the present application performs a refrigeration cycle of the air conditioner 1 by using a compressor, a condenser, an evaporator, a throttling device and a four-way valve. The refrigeration cycle includes a series of processes involving compression, condensation and evaporation, and supplies refrigerant to the air that has been adjusted and heat exchanged.

[0054] The compressor compresses the refrigerant gas in a high-temperature and high-pressure state that enters from the return pipe and discharges the compressed refrigerant gas through the discharge pipe. The discharged refrigerant gas flows into the condenser from the condenser inlet pipe. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0055] The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner 1 can adjust the temperature of the indoor space.

[0056] In combination Figure 2 and Figure 4 shown, the air conditioner 1 in the present application includes an indoor unit 13 and an outdoor unit 12, which can be provided as a split unit. The indoor unit 13 can be provided as a wall-mounted, ceiling-mounted, duct-mounted, etc., and the indoor unit 13 is installed on the top or top of the indoor room.

[0057] For example, the indoor hanging machine is usually installed at the indoor wall surface or the like, and for example, the indoor cabinet machine (not shown in the figure) is also one of the indoor unit 13 forms of the indoor unit 13.

[0058] For example, the air conditioner 1 includes an indoor unit 13 and an outdoor unit 12, wherein the outdoor unit 12 is usually provided outdoors for indoor environment heat exchange.

[0059] In addition, the air conditioner 1 is provided with a controller 71 to control the operation of each component in the air conditioner 1, so that each component of the air conditioner 1 operates to achieve each predetermined function of the air conditioner 1. Among them, the air conditioner 1 is also attached with a control device 200, for example, the control device 200 is specifically provided as a remote controller, which has the function of communicating with the controller 71, for example, using infrared or other communication methods. The remote controller is used for the user to control various controls of the air conditioner 1, to realize the interaction between the user and the air conditioner 1.

[0060] The indoor unit 13 of the air conditioner 1 in the embodiments of the present application is arranged at the top or upper part of the indoor space. Generally, the installation height of the indoor unit 13 is higher than the user activity area. The indoor unit 13 comprises a return air inlet 17 and an air outlet 16 which are in communication with the indoor space. The indoor air passes through the return air inlet 17 and the indoor unit 13, and then flows back to the indoor space through the air outlet 16.

[0061] A deflector 2 is arranged at the position of the air outlet 16. The deflector 2 adjusts the air outflow direction of the air flowing through the air outlet 12 by changing the relative rotation angle of the deflector 2 with the air outlet 16, thereby affecting the air temperature stratification in the indoor space.

[0062] The embodiments of the present application also provide a hardware structure schematic diagram of a controller 71, as shown in the figure. The controller 71 comprises a processor 83. Optionally, the controller 71 further comprises a memory 82 and a communication interface 84 which are connected with the processor 83. The processor 83, the memory 82 and the communication interface 84 are connected through a bus 81. Figure 3

[0063] The processor 83 can be a central processing unit (CPU), a general processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The processor 83 can also be any other device with processing function, such as a circuit, a device or a software module. The processor 83 can also comprise a plurality of CPUs, and the processor 83 can be a single-CPU processor 83 or a multi-CPU processor 83. The processor 83 herein can refer to one or more devices, circuits or processing cores for processing data (such as computer program instructions).

[0064] ​The memory 82 can be a read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, a random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 82 can exist independently or be integrated with the processor 83. The memory 82 may contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby implementing the control method of the air conditioner 1 provided in this application embodiment.

[0065] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 84 can be a module, circuit, transceiver, or any device capable of communication.

[0066] Bus 81 can be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81, etc. Bus 81 can be divided into address bus 81, data bus 81, control bus 81, etc.

[0067] The following is combined Figures 4-11 An air conditioner 1 and its control method according to an embodiment of the present invention are described.

[0068] In some embodiments, such as Figure 4As shown, the air conditioner 1 comprises an indoor unit 13 and an outdoor unit 12, and the indoor unit 13 and the outdoor unit 12 constitute a refrigerant circulation system through a connecting pipe, so that the refrigerant performs a refrigeration cycle in a compressor, a four-way valve, a condenser, a throttling device, and an evaporator, one of the condenser and the evaporator being an outdoor heat exchanger and the other being an indoor heat exchanger.

[0069] In some embodiments, as shown in Figure 4 As shown, the air conditioner 1 can comprise a wire controller 14 configured to send a temperature control start signal or a temperature control stop signal to the outdoor unit 12.

[0070] In some embodiments, as shown in Figure 4 As shown, the air conditioner 1 can comprise a pressure sensor 15 configured to detect a pressure value corresponding to the compressor.

[0071] In one embodiment, the pressure sensor 15 can comprise one pressure sensor, which can be arranged on the E pipe of the four-way valve of the air conditioner to detect the pressure value corresponding to the compressor, i.e., the pressure value corresponding to the compressor is the E pipe pressure value of the four-way valve.

[0072] In another embodiment, the pressure sensor 15 can comprise two pressure sensors, which are respectively arranged on the C pipe and the D pipe of the four-way valve and respectively correspond to an exhaust pressure sensor and a suction pressure sensor. Thus, the pressure value corresponding to the compressor is the pressure of the C pipe or the D pipe, i.e., the exhaust pressure value or the suction pressure value of the compressor.

[0073] In some embodiments, as shown in Figure 4 As shown, the air conditioner 1 can comprise a controller 71 configured to: when receiving a temperature control stop signal, record a first pressure value corresponding to the compressor at this time of temperature control stop;

[0074] determine a target pressure value of the compressor after this time of temperature control stop according to the first pressure value and a preset pressure value;

[0075] control the compressor to operate according to the target pressure value after this time of temperature control stop, and monitor whether the outdoor unit 12 has not received a temperature control start signal within a preset time;

[0076] control the operating state of the compressor according to the monitoring result and adjust the target pressure value of the compressor after the next time of temperature control stop, and control the compressor to operate according to the target pressure value of the compressor after the next time of temperature control stop.

[0077] Specifically, in the control process of the air conditioner 1, when the temperature control switch of the wire controller is triggered, a temperature control shutdown signal can be sent to the controller 71 of the outdoor unit 12, at this time, the controller 71 of the outdoor unit 12 can trigger the pressure sensor 15 arranged on the pipeline between the compressor and the four-way valve in the outdoor unit 12 to read the current pressure value of the compressor, that is, the first pressure value. It can be understood that the first pressure value corresponding to the compressor at this temperature control shutdown is the pressure value corresponding to the compressor after the outdoor unit 12 runs for a preset time after receiving the temperature control shutdown signal, rather than the pressure value corresponding to the compressor when the outdoor unit 12 receives the temperature control shutdown signal.

[0078] Further, the preset pressure value can be reasonably set according to the actual situation or experimental theory, and the target pressure value of the compressor after this temperature control shutdown can be generated by the operation (addition or subtraction) of the first pressure value and the preset pressure value.

[0079] Further, when the controller 71 determines the target pressure value of the compressor after this temperature control shutdown according to the first pressure value and the preset pressure value, the operation of the compressor can be controlled to make the compressor run according to the target pressure value after this temperature control shutdown, including but not limited to determining the target frequency range corresponding to the target pressure value after this temperature control shutdown according to the target pressure value after this temperature control shutdown, and then controlling the frequency of the compressor to adjust to the target frequency range for running. At the same time, in the process of the compressor running according to the target pressure value after this temperature control shutdown, the controller 71 can continuously monitor whether the outdoor unit 12 has not received a temperature control startup signal within a preset time.

[0080] Further, in the process of continuously monitoring whether the outdoor unit 12 has not received a temperature control startup signal within a preset time, the operation state of the compressor can be controlled according to the monitoring result, and the target pressure value of the compressor after the next temperature control shutdown can be dynamically adjusted, and the compressor can be controlled to run according to the target pressure value of the compressor after the next temperature control shutdown after the next temperature control shutdown, so as to reduce the start-stop frequency of the compressor, make the compressor run more smoothly, reduce the increase of energy consumption and equipment wear and tear problems caused by the unstable operation of the compressor, and prolong the service life of the compressor.

[0081] According to the air conditioner 1 of the embodiment of the present application, after the outdoor unit 12 receives the temperature control shutdown signal, the target pressure of the compressor after this temperature control shutdown can be reasonably set by the pressure corresponding to the compressor during the temperature control shutdown, the running state of the compressor is controlled according to the monitoring result of the temperature control startup signal within the preset time, and the target pressure after the next temperature control shutdown is dynamically adjusted, so that the compressor is controlled to run according to the target pressure value of the compressor after the next temperature control shutdown after the next temperature control shutdown, the effect of step-by-step gradient running of the compressor from high frequency to low frequency is realized, the start-stop frequency of the compressor is reduced, the running of the compressor is smoother, the increase of energy consumption and equipment wear caused by unstable running of the compressor are reduced, the effects of energy saving and prolonging the service life of the compressor are achieved.

[0082] In an embodiment of the present application, the preset pressure value includes a first preset pressure value, and in the heating operation mode, the difference between the first pressure value and the first preset pressure value is determined as the target pressure value of the compressor after this temperature control shutdown.

[0083] Specifically, when the target pressure value of the compressor after this temperature control shutdown is determined according to the first pressure value and the preset pressure value, if the air conditioner 1 is in the heating operation mode, the difference between the first pressure value and the first preset pressure value can be calculated to determine the target pressure value of the compressor after this temperature control shutdown. For example, the first preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, which is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the heating operation mode, the first preset pressure value is a MPa, and the target pressure value of the compressor after this temperature control shutdown is (P-a) MPa, which aims to make the target pressure lower than the first pressure value. It can be understood that in the heating operation mode, the first pressure value can be the discharge pressure value, i.e. the high pressure value, and the smaller the target pressure value, the lower the demand for high frequency running of the compressor, i.e. the smaller the running frequency of the compressor, so that the reasonable frequency reduction of the compressor can be realized by reasonably reducing the pressure value of the compressor after the temperature control shutdown.

[0084] In an embodiment of the present application, in the heating operation mode, if no temperature control startup signal is received within the preset time, the compressor is directly controlled to shut down, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to the sum of the target pressure value of the compressor after this temperature control shutdown and a second preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is less than the first pressure value.

[0085] Specifically, when controlling the operation state of the compressor and adjusting the target pressure value of the compressor after the next temperature control shutdown according to the monitoring result, if the controller 71 of the outdoor unit 12 does not receive the temperature control start signal within the preset time in the heating operation mode, the compressor can be directly controlled to stop running to save energy and reduce unnecessary mechanical wear and tear, thereby prolonging the service life of the compressor.

[0086] Further, the target pressure value of the compressor after the next temperature control shutdown can be adjusted to be the sum of the target pressure value of the compressor after the current temperature control shutdown and a second preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is less than the first pressure value. For example, the second preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, and is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the heating operation mode, if the second preset pressure value is b MPa, the target pressure value of the compressor after the next temperature control shutdown is (P-a+b) MPa. It can be understood that by adjusting the target pressure value of the compressor after the next temperature control shutdown to be the sum of the target pressure value of the compressor after the current temperature control shutdown and the second preset pressure value, the difference between the target pressure value after the next temperature control shutdown and the first pressure value can be kept within a small range, so as to avoid the unstable operation of the compressor caused by large pressure fluctuation. At the same time, the target pressure value of the compressor after the next temperature control shutdown is less than the first pressure value, which can ensure that the high frequency operation requirement of the compressor is still low, i.e., the corresponding operation frequency of the compressor is still decreasing, and the reasonable frequency reduction of the compressor can still be realized.

[0087] In an embodiment of the present application, in the heating operation mode, if the temperature control start signal is received within the preset time, the compressor is controlled to run within the frequency range determined according to the actual heating demand, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to be the difference between the target pressure value of the compressor after the current temperature control shutdown and a third preset pressure value.

[0088] Specifically, when controlling the operation state of the compressor and adjusting the target pressure value of the compressor after the next temperature control shutdown according to the monitoring result, if the controller 71 of the outdoor unit 12 receives the temperature control start signal again within the preset time in the heating operation mode, the compressor can be controlled to run within the frequency range determined according to the actual heating demand, so as to ensure that the indoor temperature can quickly and smoothly reach the set value of the user.

[0089] Further, the target pressure value of the compressor after the next temperature control shutdown can be adjusted as a difference between the target pressure value of the compressor after the current temperature control shutdown and a third preset pressure value. For example, the third preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, and is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the heating operation mode, the third preset pressure value is c MPa, and then the target pressure value of the compressor after the next temperature control shutdown is (P-a-c) MPa, which aims to make the target pressure value of the compressor after the next temperature control shutdown lower than the target pressure value of the compressor after the current temperature control shutdown. It can be understood that the smaller the target pressure value is, the lower the high-frequency operation demand of the compressor is, and the smaller the corresponding operation frequency of the compressor is. That is, by reasonably reducing the pressure value of the compressor after the temperature control shutdown, the reasonable frequency reduction of the compressor can be realized.

[0090] In an embodiment of the present application, the preset pressure value includes a fourth preset pressure value. In the cooling operation mode, the sum of the first pressure value and the fourth preset pressure value is determined as the target pressure value of the compressor after the current temperature control shutdown.

[0091] Specifically, when the target pressure value of the compressor after the current temperature control shutdown is determined according to the first pressure value and the preset pressure value, if the air conditioner 1 is in the cooling operation mode, the sum of the first pressure value and the fourth preset pressure value can be calculated to determine the target pressure value of the compressor after the current temperature control shutdown. For example, the fourth preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, and is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the cooling operation mode, if the fourth preset pressure value is d MPa, then the target pressure value of the compressor after the current temperature control shutdown is (P+d) MPa, which aims to make the target pressure higher than the first pressure value. It can be understood that in the cooling operation mode, the first pressure value can be the suction pressure value, i.e. the low-pressure pressure value. When the target pressure value is larger, the high-frequency operation demand of the compressor is lower, and the corresponding operation frequency of the compressor is smaller. That is, by reasonably increasing the pressure value of the compressor after the temperature control shutdown, the reasonable frequency reduction of the compressor can be realized.

[0092] In an embodiment of the present application, in the cooling operation mode, if no temperature control start signal is received within the preset time, the compressor is directly shut down, and the target pressure value of the compressor after the next temperature control shutdown is adjusted as a difference between the target pressure value of the compressor after the current temperature control shutdown and a fifth preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is greater than the first pressure value.

[0093] Specifically, when controlling the running state of the compressor and adjusting the target pressure value of the compressor after the next temperature control shutdown according to the monitoring result, if the controller 71 of the outdoor unit 12 does not receive the temperature control start signal within the preset time in the refrigeration running mode, the compressor can be directly controlled to stop running, so as to save energy and reduce unnecessary mechanical wear and prolong the service life of the compressor.

[0094] Further, the target pressure value of the compressor after the next temperature control shutdown can be adjusted as the difference between the target pressure value of the compressor after the current temperature control shutdown and a fifth preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is greater than the first pressure value. For example, the fifth preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, and is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the heating running mode, if the fifth preset pressure value is e MPa, the target pressure value of the compressor after the next temperature control shutdown is (P+d-e) MPa. It can be understood that, by adjusting the target pressure value of the compressor after the next temperature control shutdown as the difference between the target pressure value of the compressor after the current temperature control shutdown and the fifth preset pressure value, the difference between the target pressure value of the compressor after the next temperature control shutdown and the first pressure value can be kept within a small range, so as to avoid the unstable running of the compressor caused by large pressure fluctuation. At the same time, the target pressure value of the compressor after the next temperature control shutdown is higher than the first pressure value, which can ensure that the high frequency running demand of the compressor is still low, i.e., the corresponding running frequency of the compressor is still decreasing, and the reasonable frequency reduction of the compressor can still be realized.

[0095] In an embodiment of the present application, in the refrigeration running mode, if the temperature control start signal is received within the preset time, the compressor is controlled to run within the frequency range determined according to the actual heating demand, and the target pressure value of the compressor after the next temperature control shutdown is adjusted as the sum of the target pressure value of the compressor after the current temperature control shutdown and a sixth preset pressure value.

[0096] Specifically, when controlling the running state of the compressor and adjusting the target pressure value of the compressor after the next temperature control shutdown according to the monitoring result, if the controller 71 of the outdoor unit 12 receives the temperature control start signal again within the preset time in the refrigeration running mode, the compressor can be controlled to run within the frequency range determined according to the actual heating demand, so as to ensure that the indoor temperature can quickly and smoothly reach the set value of the user.

[0097] Further, the target pressure value of the compressor after the next temperature control shutdown can be adjusted to be a sum of the target pressure value of the compressor after the current temperature control shutdown and a sixth preset pressure value. For example, the sixth preset pressure value is a pressure adjustment amount of the compressor preset according to experimental theory and actual situation, and is used to dynamically adjust the target pressure value of the compressor according to the current working condition. For example, in the refrigeration operation mode, if the sixth preset pressure value is f MPa, the target pressure value of the compressor after the next temperature control shutdown is (P+d+f) MPa, and the purpose is to make the target pressure value of the compressor after the next temperature control shutdown higher than the target pressure value of the compressor after the current temperature control shutdown. It can be understood that in the refrigeration operation mode, the first pressure value can be the suction pressure value, i.e., the low pressure value, and the greater the target pressure value, the lower the high frequency operation demand of the compressor, and the smaller the corresponding operation frequency of the compressor, i.e., by reasonably increasing the pressure value of the compressor after the temperature control shutdown, the reasonable frequency reduction of the compressor can be realized.

[0098] In an embodiment of the present application, when recording the first pressure value of the compressor corresponding to the current temperature control shutdown, the controller 71 is configured to: obtain the operation mode of the air conditioner 1; and record the first pressure value according to the operation mode of the air conditioner 1.

[0099] Specifically, in the operation process of the air conditioner 1, because the working state of the compressor and the circulation direction of the refrigerant are different in different operation modes, the pressure change law of the compressor is different, therefore, when recording the first pressure value of the compressor corresponding to the current temperature control shutdown, the operation mode (for example, the heating operation mode or the refrigeration operation mode) of the air conditioner 1 can be obtained, and the first pressure value can be recorded according to the operation mode of the air conditioner 1.

[0100] In an embodiment of the present application, when recording the first pressure value according to the operation mode of the air conditioner 1, the controller 71 is configured to: when the operation mode of the air conditioner 1 is the heating operation mode, record the discharge pressure value of the compressor as the first pressure value; and when the operation mode of the air conditioner 1 is the refrigeration operation mode, record the suction pressure value of the compressor as the first pressure value.

[0101] Specifically, in the operation process of the air conditioner 1, when the operation mode of the air conditioner 1 is the heating operation mode, because the compressor sucks in the low-temperature and low-pressure refrigerant gas and compresses it into high-temperature and high-pressure gas, and then discharges the high-temperature and high-pressure gas to the indoor heat exchanger (condenser) to release heat, at this time, the discharge pressure value of the compressor directly reflects the heating capacity of the air conditioner 1 and the indoor heat load, therefore, the discharge pressure value of the compressor can be recorded as the first pressure value.

[0102] Further, when the operation mode of the air conditioner 1 is the refrigeration operation mode, since the refrigerant enters the indoor evaporator to absorb heat after being depressurized by the throttling device, and the low-pressure gaseous refrigerant returns to the compressor, at this time, the suction pressure value of the compressor directly reflects the heat absorption efficiency of the evaporator and the refrigeration demand, and therefore, the suction pressure value of the compressor can be recorded as the first pressure value.

[0103] In an embodiment of the present application, after receiving the temperature control shutdown signal, the controller 71 is further configured to: when it is judged that the condition for entering the temperature control shutdown adjustment is met, record the first pressure value corresponding to the compressor at this time of temperature control shutdown, otherwise, do not record the first pressure value corresponding to the compressor at this time of temperature control shutdown, and directly control the compressor to stop, wherein the condition for entering the temperature control shutdown adjustment includes: the temperature control shutdown signal is a preset alternating current signal, and the number of times of receiving the temperature control shutdown signal is greater than a preset number, and the compressor frequency before the last time of temperature control shutdown in the preset number is greater than a preset frequency threshold.

[0104] Specifically, after receiving the temperature control shutdown signal, the controller 71 can not only respond to the temperature control shutdown signal, but also judge whether the condition for entering the temperature control shutdown adjustment mode is met, and execute subsequent operations according to the judgment result. For example, when it is judged that the condition for entering the temperature control shutdown adjustment is met, the first pressure value corresponding to the compressor at this time of temperature control shutdown can be recorded, otherwise, the first pressure value corresponding to the compressor at this time of temperature control shutdown is not recorded, and the compressor is directly controlled to stop. Wherein, the condition for entering the temperature control shutdown adjustment includes: the temperature control shutdown signal is a preset alternating current signal (for example, a 24V alternating current signal), and the number of times of receiving the temperature control shutdown signal is greater than a preset number (that is, the temperature control shutdown signal at this time is a valid signal), and the compressor frequency before the last time of temperature control shutdown in the preset number is greater than a preset frequency threshold (that is, to ensure that the temperature control shutdown signal is received in a high-frequency running state, to avoid invalid operation in a low-frequency running state).

[0105] According to the air conditioner 1 of the embodiment of the present application, after the outdoor unit 12 receives the temperature control shutdown signal, the target pressure of the compressor after this time of temperature control shutdown can be reasonably set according to the pressure corresponding to the compressor at this time of temperature control shutdown, and the running state of the compressor can be controlled according to the monitoring result of the temperature control startup signal within a preset time, and the target pressure after the next time of temperature control shutdown is dynamically adjusted, so as to control the compressor to run according to the target pressure value of the compressor at the next time of temperature control shutdown after the next time of temperature control shutdown, to realize the effect of step-by-step gradient running of the compressor from high frequency to low frequency, thereby reducing the start-stop frequency of the compressor, making the compressor run more smoothly, reducing the increase of energy consumption and equipment wear and tear caused by unstable running of the compressor, and achieving the effects of energy saving and prolonging the service life of the compressor.

[0106] As shown in Figure 5 the control method of the air conditioner of the embodiment of the present application at least includes steps S1-S4.

[0107] Step S1, when receiving the temperature control shutdown signal, record the first pressure value corresponding to the compressor at this time of temperature control shutdown.

[0108] Step S2, determine the target pressure value of the compressor after this time of temperature control shutdown according to the first pressure value and the preset pressure value.

[0109] Step S3, control the compressor to run according to the target pressure value of the compressor after this time of temperature control shutdown, and monitor whether the outdoor unit has not received the temperature control start signal within the preset time.

[0110] Step S4, control the running state of the compressor and adjust the target pressure value of the compressor after the next time of temperature control shutdown according to the monitoring result, and control the compressor to run according to the target pressure value of the compressor after the next time of temperature control shutdown.

[0111] In some embodiments, in combination with Figure 6 As shown, the preset pressure value includes a first preset pressure value, and in the heating operation mode, the difference between the first pressure value and the first preset pressure value is determined as the target pressure value of the compressor after this time of temperature control shutdown.

[0112] In some embodiments, in combination with Figure 7 As shown, in the heating operation mode, if the temperature control start signal is not received within the preset time, the compressor is directly controlled to shut down, and the target pressure value of the compressor after the next time of temperature control shutdown is adjusted to be the sum of the target pressure value of the compressor after this time of temperature control shutdown and a second preset pressure value, wherein the target pressure value of the compressor after the next time of temperature control shutdown is less than the first pressure value.

[0113] In some embodiments, in combination with Figure 7 As shown, in the heating operation mode, if the temperature control start signal is received within the preset time, the compressor is controlled to run within a frequency range determined according to actual heating demand, and the target pressure value of the compressor after the next time of temperature control shutdown is adjusted to be the difference between the target pressure value of the compressor after this time of temperature control shutdown and a third preset pressure value.

[0114] In some embodiments, in combination with Figure 6 As shown, the preset pressure value includes a fourth preset pressure value, and in the cooling operation mode, the sum of the first pressure value and the fourth preset pressure value is determined as the target pressure value of the compressor after this time of temperature control shutdown.

[0115] In some embodiments, in combination with Figure 8In the refrigeration mode, if the temperature control start signal is not received within the preset time, the compressor is directly turned off, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to the difference between the target pressure value of the compressor after the current temperature control shutdown and the fifth preset pressure value, wherein the target pressure value of the compressor after the next temperature control shutdown is less than the first pressure value.

[0116] In some embodiments, the method further comprises Figure 8 In the refrigeration mode, if the temperature control start signal is received within the preset time, the compressor is controlled to operate within the frequency range determined according to the actual heating demand, and the target pressure value of the compressor after the next temperature control shutdown is adjusted to the sum of the target pressure value of the compressor after the current temperature control shutdown and the sixth preset pressure value.

[0117] In some embodiments, the method further comprises Figure 9 The first pressure value corresponding to the compressor at the current temperature control shutdown is recorded, specifically comprising: obtaining the operation mode of the air conditioner; and recording the first pressure value according to the operation mode of the air conditioner.

[0118] In some embodiments, the method further comprises Figure 10 The first pressure value corresponding to the compressor at the current temperature control shutdown is recorded, specifically comprising: obtaining the operation mode of the air conditioner; and recording the first pressure value according to the operation mode of the air conditioner.

[0119] In some embodiments, the method further comprises Figure 11 After receiving the temperature control shutdown signal, the method further comprises: when it is determined that the condition for entering the temperature control shutdown adjustment is met, recording the first pressure value corresponding to the compressor at the current temperature control shutdown, otherwise, not recording the first pressure value corresponding to the compressor at the current temperature control shutdown, and directly controlling the compressor to stop, wherein the condition for entering the temperature control shutdown adjustment comprises: the temperature control shutdown signal is a preset alternating current signal, the number of times of receiving the temperature control shutdown signal is greater than a preset number, and the compressor frequency before the last temperature control shutdown in the preset number is greater than a preset frequency threshold.

[0120] It should be noted that when the air conditioner is controlled, the specific implementation manner is similar to that of the air conditioner of any one of the above-mentioned embodiments of the present application, and therefore the detailed exemplary description of the control process of the air conditioner can be referred to the foregoing description of the air conditioner, and to reduce redundancy, the detailed exemplary description of the control process of the air conditioner is not repeated here.

[0121] According to the control method of the air conditioner, after the outdoor unit receives the temperature control shutdown signal, the target pressure of the compressor after this time of temperature control shutdown can be reasonably set according to the pressure corresponding to the compressor at the time of temperature control shutdown, the running state of the compressor can be controlled according to the monitoring result of the temperature control startup signal within the preset time, and the target pressure after the next temperature control shutdown is dynamically adjusted, so that the compressor is controlled to run according to the target pressure value of the compressor at the next temperature control shutdown after the next time of temperature control shutdown, the effect of step-by-step gradient running of the compressor from high frequency to low frequency is realized, the start-stop frequency of the compressor is reduced, the running of the compressor is smoother, the increase of energy consumption and equipment wear caused by unstable running of the compressor are reduced, the effects of energy saving and prolonging the service life of the compressor are achieved.

[0122] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example.

[0123] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner characterized by comprising: Comprise: An indoor unit and an outdoor unit, the indoor unit and the outdoor unit constitute a refrigerant circulation system through a connecting pipe, so that the refrigerant performs a refrigeration cycle in a compressor, a four-way valve, a condenser, a throttling device, an evaporator, one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger; A wire controller for sending a temperature control start signal or a temperature control stop signal to the outdoor unit; A pressure sensor for detecting a pressure value corresponding to the compressor; A controller configured to: When receiving the temperature control stop signal, record a first pressure value corresponding to the compressor at this time of temperature control stop; Determine a target pressure value of the compressor after this temperature control stop according to the first pressure value and a preset pressure value; Control the compressor to operate according to the target pressure value after this temperature control stop, and monitor whether the temperature control start signal is not received within a preset time; According to the monitoring result, control the operating state of the compressor and adjust the target pressure value of the compressor after the next temperature control stop, and control the compressor to operate according to the target pressure value of the compressor after the next temperature control stop.

2. The air conditioner of claim 1, wherein The preset pressure value includes a first preset pressure value, and in a heating operation mode, the difference between the first pressure value and the first preset pressure value is the target pressure value of the compressor after this temperature control stop.

3. The air conditioner of claim 2, wherein In the heating operation mode, if the temperature control start signal is not received within a preset time, the compressor is directly controlled to stop, and the target pressure value of the compressor after the next temperature control stop is adjusted to be the sum of the target pressure value of the compressor after this temperature control stop and a second preset pressure value, wherein the target pressure value of the compressor after the next temperature control stop is less than the first pressure value.

4. The air conditioner of claim 2, wherein In the heating operation mode, if the temperature control start signal is received within a preset time, the compressor is controlled to operate within a frequency range determined according to actual heating demand, and the target pressure value of the compressor after the next temperature control stop is adjusted to be the difference between the target pressure value of the compressor after this temperature control stop and a third preset pressure value.

5. The air conditioner of claim 1, wherein The preset pressure value includes a fourth preset pressure value, and in a cooling operation mode, the sum of the first pressure value and the fourth preset pressure value is the target pressure value of the compressor after this temperature control stop.

6. The air conditioner of claim 5, wherein In the cooling operation mode, if the temperature control start signal is not received within a preset time, the compressor is directly controlled to stop, and the target pressure value of the compressor after the next temperature control stop is adjusted to be the difference between the target pressure value of the compressor after this temperature control stop and a fifth preset pressure value, wherein the target pressure value of the compressor after the next temperature control stop is greater than the first pressure value.

7. The air conditioner of claim 5, wherein In the refrigeration operation mode, if the temperature control start signal is received within a preset time, the compressor is controlled to operate in a frequency range determined according to actual heating demand, and a target pressure value of the compressor after next temperature control shutdown is adjusted to a sum of a target pressure value of the compressor after this temperature control shutdown and a sixth preset pressure value.

8. The air conditioner of claim 1, wherein When recording the first pressure value corresponding to the compressor at this temperature control shutdown, the controller is configured to: obtain an operation mode of the air conditioner; record the first pressure value according to the operation mode of the air conditioner.

9. The air conditioner of claim 8, wherein When recording the first pressure value according to the operation mode of the air conditioner, the controller is configured to: when the operation mode of the air conditioner is a heating operation mode, record an exhaust pressure value of the compressor as the first pressure value; when the operation mode of the air conditioner is a refrigeration operation mode, record a suction pressure value of the compressor as the first pressure value.

10. The air conditioner of claim 1, wherein After receiving the temperature control shutdown signal, the controller is further configured to: when it is judged that the condition of entering temperature control shutdown adjustment is met, record the first pressure value corresponding to the compressor at this temperature control shutdown, otherwise, do not record the first pressure value corresponding to the compressor at this temperature control shutdown, and directly control the compressor to stop, wherein the condition of entering temperature control shutdown adjustment includes that the temperature control shutdown signal is a preset alternating current signal, the number of times of receiving the temperature control shutdown signal is greater than a preset number, and the compressor frequency before the last temperature control shutdown in the preset number is greater than a preset frequency threshold.

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