Air conditioning system and control method

Abstract

The embodiment of the present application provides an air conditioning system and a control method, which relates to the field of air conditioning technology and is used to realize automatic identification of the state of the cut-off device of the air conditioning system. The air conditioning system includes: a refrigerant circulation loop, a first cut-off device, and a second cut-off device; a controller, which is configured to: determine whether the first cut-off device and / or the second cut-off device are in a closed state according to the operating parameters of the air conditioning system; when it is determined that the first cut-off device and / or the second cut-off device are in a closed state, control the compressor to stop working. The operating parameters include the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, the working current value of the compressor, the operating frequency of the compressor, and the operating time of the compressor.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an air conditioning system and a control method. Background Art

[0002] With the development of the economy and society, air conditioners are becoming more and more widely used in various places such as entertainment, home and work, and the safety of air conditioners is particularly important.

[0003] During the installation of air conditioners, there are frequent incidents where the air conditioner system's shutoff device is not opened due to improper operation by the installer. Starting the air conditioner system with the shutoff device closed can cause the compressor to run without oil, causing high temperature demagnetization of the compressor's internal coil, or even cause the local pressure in the pipeline to exceed the upper limit, leading to an explosion, which will cause economic losses and safety risks to users and installers. Summary of the invention

[0004] The present application provides an air conditioning system and a control method for realizing automatic identification of the state of a cut-off device of the air conditioning system.

[0005] In a first aspect, an embodiment of the present application provides an air conditioning system, comprising:

[0006] The compressor is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharge it to the condenser;

[0007] An outdoor heat exchanger and an indoor heat exchanger, one of which works as a condenser and the other works as an evaporator;

[0008] Four-way valve, used to achieve the conversion between cooling and heating of the air conditioning system by changing the flow direction of the refrigerant in the system pipeline;

[0009] The refrigerant circulation loop allows the refrigerant to circulate in a loop consisting of a compressor, a four-way valve, an outdoor heat exchanger and an indoor heat exchanger;

[0010] A first cut-off device is provided on the first pipeline between the outdoor heat exchanger and the indoor heat exchanger, and is used to control the connection and cut-off of the refrigerant flowing through the first pipeline;

[0011] A second cut-off device is provided on the second pipeline between the indoor heat exchanger and the four-way valve, and is used to control the connection and cut-off of the refrigerant flowing through the second pipeline;

[0012] A controller, used to instruct the air conditioning system to execute control instructions;

[0013] A first temperature sensor is disposed at the exhaust port of the compressor and is used to detect the exhaust temperature value of the compressor;

[0014] The second temperature sensor is used to detect the temperature value of the outdoor coil;

[0015] The third temperature sensor is used to detect the outdoor environment temperature value;

[0016] A fourth temperature sensor, used to detect the temperature value of the indoor coil;

[0017] The fifth temperature sensor is used to detect the indoor environment temperature value;

[0018] The controller is configured as:

[0019] determining, according to operating parameters of the air conditioning system, whether the first cut-off device and / or the second cut-off device is in a closed state;

[0020] The operating parameters include at least one of the following parameters: the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, the working current value of the compressor, the operating frequency of the compressor and the operating time of the compressor; wherein the exhaust superheat of the compressor is the difference between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

[0021] When it is determined that the first cut-off device and / or the second cut-off device is in the closed state, the compressor is controlled to stop working.

[0022] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: In view of the problem that the state of the cut-off device of the air-conditioning system cannot be automatically identified at present, the embodiment of the present application provides an air-conditioning system, which identifies whether the cut-off device of the air-conditioning system is in the closed state according to the operating parameters of the air-conditioning system, and when any cut-off device of the air-conditioning system is identified to be in the closed state, controls the compressor to stop working, and avoids the occurrence of dangerous situations caused by the cut-off device being missed. While realizing the automatic identification of the state of the cut-off device of the air-conditioning system, the safety and intelligence of the air-conditioning system are improved.

[0023] In some embodiments, the air conditioning system further includes an indoor fan and an outdoor fan. When the controller controls the compressor to stop working, the controller also controls the indoor fan and the outdoor fan to stop working.

[0024] In some embodiments, the controller is configured to determine whether the first cut-off device and / or the second cut-off device are in a closed state based on the operating parameters of the air-conditioning system, and is specifically configured as follows: if the air-conditioning system is in a cooling mode or a dehumidification mode, the first cut-off device and / or the second cut-off device are determined to be in a closed state when a first preset condition is met; the first preset condition includes: the operating frequency of the compressor is above a first frequency threshold, the operating current value of the compressor is below a first preset current value, the operating time of the compressor is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference.

[0025] In some embodiments, the controller is configured to determine whether the first cut-off device and / or the second cut-off device is in the closed state according to the operating parameters of the air-conditioning system, and is specifically configured as follows: if the air-conditioning system is in the heating mode, when the second preset condition is met, if the third preset condition or the fourth preset condition is met, then it is determined that the first cut-off device and / or the second cut-off device is in the closed state;

[0026] The second preset condition includes: the operating frequency of the compressor is above the second frequency threshold, the operating current value of the compressor is below the second preset current value, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below the third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below the fourth preset difference;

[0027] The third preset condition includes: the operation time of the compressor is less than the first preset time and the exhaust gas superheat of the compressor is above the first superheat threshold;

[0028] The fourth preset condition includes: the operating time of the compressor is less than the second preset time, the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold, and the second superheat threshold is less than the third superheat threshold.

[0029] In some embodiments, the air-conditioning system also includes: a wire controller, the wire controller includes a display; a controller, which is configured to control the compressor to stop working, and the controller is also configured to: send an alarm message to the wire controller so that the display of the wire controller displays the alarm message, and the alarm message is used to indicate that the cut-off device of the air-conditioning system is in an abnormal state.

[0030] In some embodiments, the controller is further configured to: record the number of times alarm information is sent to the wire controller; when it is detected that the number of times alarm information is sent to the wire controller reaches a preset number, lock the air-conditioning system and issue maintenance information, wherein the maintenance information is used to instruct maintenance of the cut-off device of the air-conditioning system.

[0031] In a second aspect, an embodiment of the present application provides a method for controlling an air conditioning system, the method comprising:

[0032] When the air conditioning system is in operation, determining whether the first cut-off device and / or the second cut-off device is in a closed state according to the operation parameters of the air conditioning system;

[0033] The operating parameters of the air conditioning system include at least one of the following parameters: the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, the working current value of the compressor, the operating frequency of the compressor and the operating time of the compressor; wherein the exhaust superheat of the compressor is the difference between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

[0034] When it is determined that the first cut-off device and / or the second cut-off device is in the closed state, the compressor is controlled to stop working.

[0035] In some embodiments, the method includes: if the air-conditioning system is in cooling mode or dehumidification mode, under the condition that a first preset condition is met, determining that the first cut-off device and / or the second cut-off device is in a closed state, the first preset condition includes: the operating frequency of the compressor is above a first frequency threshold, the operating current value of the compressor is below a first preset current value, the operating time of the compressor is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference.

[0036] In some embodiments, the method includes: if the air conditioning system is in a heating mode, if the second preset condition is met, if the third preset condition or the fourth preset condition is met, determining that the first cut-off device and / or the second cut-off device is in a closed state; the second preset condition includes: the operating frequency of the compressor is above the second frequency threshold, the working current value of the compressor is below the second preset current value, the temperature difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below the third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below the fourth preset difference;

[0037] The third preset condition includes: the operation time of the compressor is less than the first preset time and the exhaust gas superheat of the compressor is above the first superheat threshold;

[0038] The fourth preset condition includes: the operating time of the compressor is less than the second preset time, the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold, and the second superheat threshold is less than the third superheat threshold.

[0039] In some embodiments, after controlling the compressor to stop working, the method further includes: sending an alarm message to the wire controller so that a display of the wire controller displays the alarm message, wherein the alarm message is used to indicate that the cut-off device of the air-conditioning system is in an abnormal state.

[0040] In some embodiments, the method further includes: recording the number of times alarm information is sent to the wire controller; when it is detected that the number of times alarm information is sent to the wire controller reaches a preset number, locking the air-conditioning system and issuing maintenance information, wherein the maintenance information is used to instruct maintenance of the cut-off device of the air-conditioning system.

[0041] In a third aspect, an embodiment of the present application provides a controller comprising: one or more processors; one or more memories; wherein the one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the controller executes any one of the air-conditioning system control methods provided in the second aspect.

[0042] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which includes computer instructions. When the computer instructions are executed on a computer, the computer executes any one of the air-conditioning system control methods provided in the second aspect.

[0043] In a fifth aspect, an embodiment of the present application provides a computer program product, which can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement any air-conditioning system control method provided in the second aspect.

[0044] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium, wherein 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.

[0045] The beneficial effects described in the second to fifth aspects of the present application can be referred to the beneficial effect analysis of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0047] Figure 1 A schematic diagram of the composition of an air conditioning system provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of the structure of an air conditioning system provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of the structure of a controller provided in an embodiment of the present application;

[0050] Figure 4 A hardware configuration block diagram of an air conditioning system provided in an embodiment of the present application;

[0051] Figure 5 A flow chart of a control method for an air conditioning system provided in an embodiment of the present application;

[0052] Figure 6 A schematic flow chart of another method for controlling an air conditioning system provided in an embodiment of the present application;

[0053] Figure 7 A schematic flow chart of another method for controlling an air conditioning system provided in an embodiment of the present application;

[0054] Figure 8 A schematic flow chart of another method for controlling an air conditioning system provided in an embodiment of the present application;

[0055] Fig. 9 A schematic flow chart of another method for controlling an air conditioning system provided in an embodiment of the present application;

[0056] Fig.10 A schematic diagram of the overall process of a control method for an air conditioning system provided in an embodiment of the present application;

[0057] Fig.11 A schematic diagram of the hardware structure of the controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing a pipeline, the "connected" and "connection" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0062] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0063] At present, in order to prevent explosions caused by sparks in electrical components, the shell temperature protector has been cancelled for R32 refrigerant compressors in the industry, and air-conditioning products with a power of 3 hp or less are not equipped with high and low pressure switches. However, during the installation of air conditioners, incidents of the shutoff device being missed due to improper operation by installers often occur. Starting the air conditioning system with the shutoff device closed can cause the compressor to run without oil, causing high-temperature demagnetization of the internal coil of the compressor, or even cause the local pressure of the pipeline to exceed the upper limit, or even cause an explosion, which will cause economic losses and safety risks to users and installers.

[0064] Based on this, the embodiment of the present application provides an air-conditioning system and a control method, which automatically identifies the state of the shut-off device of the air-conditioning system by comparing the operating parameters of the air-conditioning system with preset conditions, thereby realizing automatic identification of the state of the shut-off device of the air-conditioning system, and when it is determined that any shut-off device of the air-conditioning system is in a closed state, controls the compressor to stop working, thereby avoiding the occurrence of dangerous situations due to the failure of the shut-off device to open, thereby improving the safety of the air-conditioning system and the intelligence level of the air-conditioning system.

[0065] To facilitate understanding, the basic concepts of some terms or technologies involved in the embodiments of the present application are first briefly introduced and explained.

[0066] Refrigerant: A substance that easily absorbs heat and turns into gas, and easily releases heat and turns into liquid. In the air conditioning system, heat energy is transferred through the evaporation and condensation of the refrigerant.

[0067] Refrigeration mode: The compressor of the air conditioning system draws the low-temperature and low-pressure gaseous refrigerant evaporated by the evaporator into the compressor cavity, compresses it into a high-temperature and high-pressure gaseous refrigerant, and enters the condenser. The high-temperature and high-pressure gaseous refrigerant is condensed into a high-temperature and high-pressure liquid refrigerant in the condenser, and then passes through a throttling element such as an electronic expansion valve, and becomes a low-temperature and low-pressure liquid refrigerant. After evaporation in the evaporator, it finally returns to the compressor, thus completing the entire refrigeration cycle. Among them, the outdoor heat exchanger in the refrigeration mode is used as a condenser, and the indoor heat exchanger is used as an evaporator.

[0068] Heating mode: The compressor of the air conditioning system draws the low-temperature, low-pressure gaseous refrigerant evaporated by the evaporator into the compressor cavity, compresses it into a high-temperature, high-pressure gaseous refrigerant, and enters the condenser. The high-temperature, high-pressure gaseous refrigerant is condensed into a high-temperature, high-pressure liquid refrigerant in the condenser, and then passes through a throttling element such as an electronic expansion valve to become a low-temperature, low-pressure liquid refrigerant. After evaporation in the evaporator, it finally returns to the compressor, thus completing the entire refrigeration cycle. Among them, the outdoor heat exchanger in the heating mode is used as an evaporator, and the indoor heat exchanger is used as a condenser.

[0069] Figure 1 This is a schematic diagram of the composition of an air-conditioning system provided according to an exemplary embodiment of the present application. It should be noted that the air-conditioning system involved in the embodiment of the present application can be different types of air-conditioning systems, for example, it can be a common air-conditioning system including an indoor unit and an outdoor unit, or it can be a multi-split air-conditioning system commonly known as "one-to-many". Different types of air-conditioning systems are based on Figure 1 The air conditioning system composition diagram shown in the figure is used as an example to illustrate. Figure 1 As shown, the air conditioning system 10 includes an outdoor unit 14 and an indoor unit 13 .

[0070] The indoor unit 13 is an indoor hanging unit, for example, and the indoor hanging unit is usually installed on an indoor wall, etc. For another example, an indoor cabinet unit is also a form of indoor unit of the indoor unit.

[0071] The outdoor unit 14 is usually set outdoors and used for indoor environment heat exchange. Figure 1 In the figure, since the outdoor unit 14 is located outdoors on the opposite side of the indoor unit 13 across the wall, the outdoor unit 14 is indicated by a dotted line.

[0072] Specifically, Figure 2 The figure shows a schematic diagram of the structure of an air conditioning system provided by the present application according to an exemplary embodiment. The air conditioning system 10 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 15, an indoor heat exchanger 16, a first temperature sensor 17, a second temperature sensor 18, a third temperature sensor 19, a fourth temperature sensor 20, a fifth temperature sensor 21, a throttling device 22, a first cut-off device 23, a second cut-off device 24, a controller 50 ( Figure 2 ) and the wire controller 51 ( Figure 2 not shown).

[0073] In addition, the first temperature sensor 17 , the first temperature sensor 18 , the third temperature sensor 19 , the first cutoff device 23 , the fourth temperature sensor 20 , the fifth temperature sensor 21 , the second cutoff device 24 , the indoor unit 13 and the outdoor unit 14 are all in communication connection with the controller 50 .

[0074] In some embodiments, two ends of the compressor 11 are connected to two ports of a four-way valve 12 for compressing the refrigerant in the air-conditioning system and delivering the compressed refrigerant to the outdoor heat exchanger 15 or the indoor heat exchanger 16 via the four-way valve 12 .

[0075] In some embodiments, the compressor 11 may be a variable capacity inverter compressor that performs inverter-based speed control.

[0076] In some embodiments, the controller 50 can obtain the working current value of the compressor 11 at each moment, the operating frequency of the compressor at each moment, and the operating time of the compressor after each startup.

[0077] In some embodiments, Figure 2 As shown, the D port and the S port of the four-way valve 12 are connected to the compressor 11, the C port of the four-way valve 12 is connected to the outdoor heat exchanger 15, and the E port of the four-way valve 12 is connected to the second cut-off device 24. The four-way valve 12 is used to achieve the mutual conversion between cooling and heating by changing the flow direction of the refrigerant in the system pipeline.

[0078] In some embodiments, the outdoor unit 14 includes an outdoor heat exchanger 15 , and the outdoor unit 14 may further include an outdoor fan and a coil, ie, an outdoor coil.

[0079] In some embodiments, one end of the outdoor heat exchanger 15 is connected to the four-way valve 12, and the other end is connected to the throttling device 22. The outdoor heat exchanger 15 has a first inlet and outlet for allowing the refrigerant to flow between the outdoor heat exchanger 15 and the four-way valve 12, and has a second inlet and outlet for allowing the refrigerant to flow between the outdoor heat exchanger 15 and the throttling device 22. The outdoor heat exchanger 15 exchanges heat between the heat exchanger flowing in the heat transfer pipe connected between the first inlet and outlet and the second inlet and outlet and the outdoor air. In the refrigeration cycle, the outdoor heat exchanger 15 works as a condenser. In the heating cycle, the outdoor heat exchanger 15 works as an evaporator.

[0080] In some embodiments, the indoor unit 13 includes an indoor heat exchanger 16, and the indoor unit 13 may further include an indoor fan and a coil, that is, an indoor coil.

[0081] In some embodiments, the indoor heat exchanger 16 has a third inlet and outlet for allowing the refrigerant to flow between the first shutoff device 23, and a fourth inlet and outlet for allowing the gas refrigerant to flow between the second shutoff device 24. The indoor heat exchanger 16 exchanges heat between the refrigerant flowing in the heat transfer pipe connected between the third inlet and the fourth inlet and outlet and the indoor air. In the refrigeration cycle, the indoor heat exchanger 16 works as an evaporator. In the heating cycle, the indoor heat exchanger 16 works as a condenser.

[0082] In some embodiments, the first temperature sensor 17 is disposed at the exhaust port of the compressor to detect the exhaust temperature value of the compressor and send the exhaust temperature value of the compressor to the controller 50 .

[0083] The second temperature sensor 18 is disposed on the outdoor coil and is used to detect the temperature value of the outdoor coil and send the temperature value of the outdoor coil to the controller 50 .

[0084] The third temperature sensor 19 is disposed on the outdoor unit 14 , and is used to detect the ambient temperature value of the outdoor unit 14 , that is, the outdoor ambient temperature value, and send the outdoor ambient temperature value to the controller 50 .

[0085] The fourth temperature sensor 20 is disposed on the indoor coil, and is used to detect the temperature value of the indoor coil, and send the temperature value of the indoor coil to the controller 50 .

[0086] The fifth temperature sensor 21 is disposed on the indoor unit 13 , and is used to detect the ambient temperature value of the indoor unit 13 , that is, the indoor ambient temperature value, and send the indoor ambient temperature value to the controller 50 .

[0087] In some embodiments, the throttling device 22 has the function of expanding and reducing the pressure of the refrigerant flowing through the throttling device 22, and can be used to adjust the supply amount of the refrigerant in the pipeline.

[0088] In some embodiments, the throttling device 22 may be an electronic expansion valve.

[0089] In the case where the throttling device 22 is an electronic expansion valve, if the electronic expansion valve decreases its opening, the flow resistance of the refrigerant passing through the electronic expansion valve increases. If the electronic expansion valve increases its opening, the flow resistance of the refrigerant passing through the electronic expansion valve decreases. In this way, even if the states of other components in the circuit do not change, when the opening of the electronic expansion valve changes, the flow rate of the refrigerant flowing to the indoor unit 13 will also change.

[0090] In some embodiments, the first shut-off device 23 is disposed in the first pipeline between the outdoor heat exchanger 15 and the indoor heat exchanger 16, and is used to control the connection and cutoff of the refrigerant flowing through the first pipeline.

[0091] Among them, the first pipeline can be called a liquid pipeline.

[0092] In some embodiments, the second shut-off device 24 is disposed in the second pipeline between the indoor heat exchanger 16 and the four-way valve 12, and is used to control the connection and cutoff of the refrigerant flowing through the second pipeline.

[0093] Among them, the first pipeline can be called an air pipe.

[0094] In some embodiments, the first shutoff device 23 and the second shutoff device 24 can both be shutoff valves, wherein the first shutoff device 23 can be a liquid shutoff valve, and the second shutoff device 24 can be a gas shutoff valve. The shutoff valve relies on the valve stem pressure to make the valve disc sealing surface fit tightly with the valve seat sealing surface to prevent the medium from flowing.

[0095] In the embodiment shown in the present application, the controller 50 is a device that can generate an operation control signal according to the instruction operation code and the timing signal to instruct the air conditioning system to execute the control instruction. The controller can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The controller can also be other devices with processing functions, such as circuits, devices or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0096] In addition, the controller 50 can be used to control the operation of various components inside the air-conditioning system 10, so that the various components of the air-conditioning system 10 can operate to achieve various predetermined functions of the air-conditioning system.

[0097] Reference Figure 3 , is a schematic diagram of the structure of a controller provided in an embodiment of the present application. Figure 3 As shown, the controller 50 includes an outdoor control module 501 and an indoor control module 502. The outdoor control module 501 includes a first memory 5011, and the indoor control module 502 includes a second memory 5021. The indoor control module 502 is connected to the outdoor control module 501 through wired or wireless communication. The outdoor control module 501 can be installed in the outdoor unit 14, or it can be independent of the outdoor unit 14, and is used to control the outdoor unit 14 to perform related operations. The indoor control module 502 can be installed in the indoor unit 13, or it can be independent of the indoor unit 13, and is used to control the components of the indoor unit 13 and the throttling device 22 to perform related operations. It should be understood that the division of the above modules is only a functional division, and the outdoor control module 501 and the indoor control module 502 can also be integrated into one module. The first memory 5011 and the second memory 5021 can also be integrated into one memory.

[0098] In some embodiments, the first memory 5011 is used to store applications and data related to the outdoor unit 14. The outdoor control module 501 executes various functions and data processing of the air conditioning system by running the applications and data stored in the memory 5011. The first memory 5011 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and applications required for at least one function; the data storage area can store data created according to the use of the air conditioning system. In addition, the first memory 5011 may include a high-speed random access memory, and may also include a non-volatile memory, such as a disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0099] In some embodiments, the second memory 5021 is used to store applications and data related to the indoor unit 13 and the throttling device 22. The indoor control module 502 executes various functions and data processing of the air conditioning system by running the applications and data stored in the memory 5021. The second memory 5021 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and applications required for at least one function; the data storage area can store data created according to the use of the air conditioning system.

[0100] In some embodiments, there is a communication connection between the outdoor control module 501 and the outdoor unit 14, which is used to control the outdoor unit to perform related operations according to user instructions or system default instructions. Optionally, the outdoor control module 501 can also obtain the outdoor ambient temperature according to user instructions or system instructions, and store the obtained outdoor ambient temperature in the first memory 5011. Optionally, the outdoor control module 501 can also control the rotation of the four-way valve 12 in the outdoor unit 14 according to the air conditioning operation mode selected by the user to achieve the selection of cooling or heating mode.

[0101] In some embodiments, there is a communication connection between the indoor control module 502 and the indoor unit 13, which is used to control the indoor unit 13 to perform related operations according to user instructions or system default instructions. Optionally, the indoor control module 502 controls the indoor unit 13 to turn on the indoor fan and the fan motor according to the user instructions. Optionally, the indoor control module 502 can also control the indoor unit to turn on or off the compressor in the indoor unit according to the user instructions. Optionally, the indoor control module 502 can also control the indoor unit to turn on the fifth temperature sensor according to the user instructions to detect the indoor ambient temperature.

[0102] In some embodiments, there is a communication connection between the indoor control module 502 and the throttling device 22, which is used to control the throttling device 22 to perform related operations according to user instructions or system default instructions. Optionally, the indoor control module 502 can also control the opening of the throttling device 22 according to user instructions or system instructions.

[0103] In some embodiments, the air conditioning system 10 is further provided with a wired controller 51, which has the function of communicating with the controller 50 using infrared or other communication methods. The wired controller 51 is used for the user to perform various controls on the air conditioning system and realize the interaction between the user and the air conditioning system 10.

[0104] In some embodiments, the wire controller 51 includes a display, which is used to display the control panel of the air-conditioning system 10 and the current operating status of the air-conditioning system 10, such as the current operating mode and the set indoor temperature.

[0105] Reference Figure 4 , is a hardware configuration block diagram of an air conditioning system provided in an embodiment of the present application. The air conditioning system 10 may further include: a communicator 25 and a memory 26 .

[0106] In some embodiments, the communicator 25 is connected to the controller 50 for establishing a communication connection with other network entities, such as establishing a communication connection with a terminal device. The communicator 25 may include a radio frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, and a GPS module. Taking the RF module as an example, the RF module can be used for receiving and sending signals, in particular, sending the received information to the controller 50 for processing; in addition, sending the signal generated by the controller 50. Typically, the RF circuit may include but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, and the like.

[0107] For example, the air conditioning system 10 may receive a control instruction sent by a terminal device through the communicator 25 , and perform corresponding processing according to the control instruction to realize interaction between the user and the air conditioning system 10 .

[0108] In some embodiments, the memory 26 can be used to store software programs and data. The wire controller 51 executes various functions and data processing of the air conditioning system 10 by running the software programs or data stored in the memory 26. The memory 26 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. The memory 26 stores an operating system that enables the air conditioning system 10 to operate. In the present application, the memory 26 can store an operating system and various application programs.

[0109] Those skilled in the art will understand that Figure 2 The hardware structure shown in the figure does not constitute a limitation on the air conditioning system. The air conditioning system may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0110] like Figure 5 As shown, the embodiment of the present application provides an air conditioning system and a control method, the method is applied to a controller, and the controller can be the above Figure 2 The controller 50 in the air conditioning system shown, the method includes:

[0111] S101. When the air conditioning system is in operation, determine whether the first cut-off device and / or the second cut-off device is in a closed state according to operation parameters of the air conditioning system.

[0112] In some embodiments, in order to avoid the occurrence of dangerous situations due to the failure of the air conditioning system's cut-off device to open, when the air conditioning system is in operation, the controller detects the operating parameters of the air conditioning system in real time through various sensors, and determines whether the first cut-off device and / or the second cut-off device are in the closed state according to the operating parameters of the air conditioning system.

[0113] Among them, the operating parameters of the air-conditioning system include at least one of the following parameters: the exhaust temperature value of the compressor detected by the first temperature sensor, the temperature value of the outdoor coil detected by the second temperature sensor, the outdoor ambient temperature detected by the third temperature sensor, the temperature value of the indoor coil detected by the fourth temperature sensor, the indoor ambient temperature detected by the fifth temperature sensor, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, and the operating current value of the compressor reported by the compressor to the controller when the air-conditioning system is in operation, the operating frequency of the compressor and the operating time of the compressor.

[0114] The compressor exhaust superheat is the difference between the compressor exhaust temperature and the indoor coil temperature or the outdoor coil temperature.

[0115] The following situations may be included regarding the controller determining whether the first cut-off device and / or the second cut-off device is in the closed state according to the operating parameters of the air-conditioning system.

[0116] Case 1: The air conditioning system is in cooling mode or dehumidification mode.

[0117] Optionally, in case 1, if Figure 6 As shown, step S101 can be specifically implemented as the following steps:

[0118] S1011: If the air-conditioning system is in a cooling mode or a dehumidification mode, and a first preset condition is met, determining that the first cut-off device and / or the second cut-off device is in a closed state.

[0119] It is understandable that when the air conditioning system is in cooling mode or dehumidification mode, the air conditioning system uses the outdoor heat exchanger as a condenser and the indoor heat exchanger as an evaporator. Therefore, when the air conditioning system is in cooling mode or dehumidification mode, it can be determined whether the first cut-off device and / or the second cut-off device is in the closed state according to the first preset condition.

[0120] In some embodiments, the first preset condition includes: the compressor operating frequency is above a first frequency threshold, the compressor operating current value is below a first preset current value, the compressor operating time is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference.

[0121] Among them, the first frequency threshold, the first preset current value, the first preset time, the first preset difference and the second preset difference can all be preset when the air-conditioning system leaves the factory.

[0122] It can be understood that the operating parameters of the air-conditioning system can represent the operating status of the air-conditioning system when it is working. When the first cut-off device and / or the second cut-off device of the air-conditioning system are not opened, that is, the first cut-off device and / or the second cut-off device are in the closed state, the operating parameters of the air-conditioning system are different from the operating parameters when the air-conditioning system is working normally.

[0123] Combination Figure 2 The air conditioning system shown, taking the air conditioning system in cooling mode, with the second cut-off device in the closed state as an example, the refrigerant in the air conditioning system is discharged through the compressor and stored in the outdoor heat exchanger and the indoor heat exchanger. After the compressor runs for a preset time (e.g., 40 seconds), the refrigerant in the air conditioning system no longer flows, and the indoor heat exchanger and the outdoor heat exchanger cannot exchange heat. The indoor coil exchanges heat with the indoor environment, and the outdoor coil exchanges heat with the outdoor environment. Finally, the temperature value of the indoor coil is close to the temperature value of the indoor environment, and the temperature value of the outdoor coil is close to the temperature value of the outdoor environment. Therefore, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, and the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil are included in the first preset condition.

[0124] And when the refrigerant in the air-conditioning system no longer flows, the compressor continues to run, but the compressor does less work, resulting in a decrease in the operating current value of the compressor (that is, the operating current value of the compressor is below the first preset current value), and the exhaust temperature value of the compressor is reduced, so the operating current value of the compressor is also included in the first preset condition.

[0125] When the first cut-off device is in the closed state, or when both the first cut-off device and the second cut-off device are in the closed state, the refrigerant in the air-conditioning system will be stored in the outdoor heat exchanger, and the changes in the working parameters of the air-conditioning system are consistent with the changes in the working parameters when the second cut-off device of the air-conditioning system is in the closed state.

[0126] It should be noted that when the first cut-off device and the second cut-off device are both in the open state and the air-conditioning system is operating in the cooling mode at a low frequency, the air-conditioning system may also have a state in the startup phase where the temperature value of the indoor coil is close to the indoor ambient temperature value, the temperature value of the outdoor coil is close to the outdoor ambient temperature value, the compressor does less work, the operating current value of the compressor is reduced, and the exhaust temperature value of the compressor is reduced. In order to avoid false alarms during the stable operation of the air-conditioning system due to similar working conditions, the operating frequency of the compressor and the operating time of the compressor may be included in the first preset condition.

[0127] In summary, when the air-conditioning system is in the cooling mode or the dehumidification mode, and when the first preset condition is met, it is determined whether the first cut-off device and / or the second cut-off device of the air-conditioning system is in the closed state.

[0128] Scenario 2: The air conditioning system is in heating mode.

[0129] Optionally, in case 2, if Figure 7 As shown, step S101 can be specifically implemented as the following steps:

[0130] S1012: If the air conditioning system is in the heating mode, and the second preset condition is met, if the third preset condition or the fourth preset condition is met, determine that the first cut-off device and / or the second cut-off device is in the closed state.

[0131] In some embodiments, the second preset condition includes: the operating frequency of the compressor is above the second frequency threshold, the operating current value of the compressor is below the second preset current value, the temperature difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below the third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below the fourth preset difference;

[0132] The second frequency threshold, the second preset current value, the third preset difference value and the fourth preset difference value may be preset when the air conditioning system leaves the factory.

[0133] The third preset condition includes: the operating time of the compressor is less than the first preset time and the exhaust superheat of the compressor is above the first superheat threshold; wherein the first superheat threshold may be preset when the air-conditioning system leaves the factory.

[0134] The fourth preset condition includes: the operation time of the compressor is less than the second preset time, the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold, and the second superheat threshold is less than the third superheat threshold, that is, the second superheat threshold is less than the third superheat threshold. The second superheat threshold and the third superheat threshold can be preset when the air conditioning system leaves the factory.

[0135] Combination Figure 2 The air-conditioning system shown in the figure takes the case where the air-conditioning system is in heating mode, the second cut-off device is in the closed state, or the first cut-off device and the second cut-off device are both in the closed state as an example. The refrigerant in the air-conditioning system is discharged into the E pipe through the compressor. The length of this section of the pipeline is generally designed to be short. After about 3-5 minutes, the high-pressure pressure value of the air-conditioning system will rise to the safe upper limit value of the air-conditioning system. The exhaust temperature value of the compressor increases with the increase of the high-pressure pressure value of the air-conditioning system. At the same time, the working current value of the compressor increases rapidly. Therefore, the working current value of the compressor can be included in the second preset condition.

[0136] When the first cut-off device is in the closed state, the refrigerant of the air-conditioning system will be stored in the indoor heat exchanger, and the high pressure value of the air-conditioning system, the exhaust temperature value of the compressor, and the working current value of the compressor will all be maintained at a low level. Similar to when the second cut-off device is in the closed state in the cooling mode of the air-conditioning system, the refrigerant in the air-conditioning system hardly flows, so that the temperature value of the indoor coil is close to the indoor ambient temperature value, and the temperature value of the outdoor coil is close to the outdoor ambient temperature value. Therefore, the temperature difference between the temperature value of the indoor coil and the temperature value of the indoor environment and the temperature difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil can be included in the second preset condition.

[0137] It should be noted that when both the first cut-off device and the second cut-off device are in the open state and the air conditioning system is running at a special heating low frequency (the outdoor temperature is low and the indoor temperature is high, such as in a passive room), the air conditioning system may also be in the startup stage, and the temperature value of the indoor coil is close to the indoor ambient temperature value, the temperature value of the outdoor coil is close to the outdoor ambient temperature value, the compressor does less work, the working current value of the compressor is reduced, and the exhaust temperature value of the compressor is reduced. After testing, it was confirmed that the exhaust superheat of the compressor when the first cut-off device is in the closed state, the second cut-off device is in the closed state, and the first cut-off device and the second cut-off device are both in the closed state, the exhaust superheat of the compressor when the second cut-off device is in the closed state, the exhaust superheat of the compressor when the first cut-off device and the second cut-off device are both in the closed state, the exhaust superheat of the compressor when the first cut-off device is in the closed state, and the exhaust superheat of the compressor when the air conditioning system is running at a special heating low frequency. Among them, when the second cut-off device is in the closed state or the first cut-off device and the second cut-off device are both in the closed state, the exhaust temperature value of the compressor will reach a high level after the air conditioning system runs for about 3 minutes. In order to avoid false alarms during the operation of the air-conditioning system due to similar working conditions, the operating frequency of the compressor is included in the second preset condition, and the operating time of the compressor and the exhaust superheat of the compressor are included in the third and fourth preset conditions.

[0138] In summary, if the air-conditioning system is in the heating mode, when the second preset condition is met, if the third preset condition or the fourth preset condition is met, it is determined that the first cut-off device and / or the second cut-off device is in the closed state.

[0139] S102: When it is determined that the first cut-off device and / or the second cut-off device is in the closed state, control the compressor to stop working.

[0140] It is understandable that when the first cut-off device and / or the second cut-off device are in the closed state, the refrigerant in the air-conditioning system stops flowing, and the indoor heat exchanger and the outdoor heat exchanger cannot complete the heat exchange. Therefore, when the first cut-off device and / or the second cut-off device are in the closed state and the compressor continues to work, the compressor will accumulate heat, causing the temperature to rise, the internal coil of the compressor will be demagnetized due to high temperature, and the local pressure in the air-conditioning system will rise, which may cause accidents. Therefore, when it is determined that the first cut-off device and / or the second cut-off device are in the closed state, the compressor is controlled to stop working.

[0141] In some embodiments, while controlling the compressor to stop working, the controller can also control the outdoor fan and the indoor fan to stop working.

[0142] based on Figure 5 The embodiment shown brings at least the following beneficial effects: In view of the problem that the state of the cut-off device of the air-conditioning system cannot be automatically identified at present, an air-conditioning system provided by the embodiment of the present application can identify whether the cut-off device of the air-conditioning system is in the closed state according to the operating parameters of the air-conditioning system, and when it is identified that any cut-off device of the air-conditioning system is in the closed state, the compressor is controlled to stop working, thereby avoiding the occurrence of dangerous situations caused by the cut-off device being missed. While realizing the automatic identification of the state of the cut-off device of the air-conditioning system, the safety of the air-conditioning system and the intelligence of the air-conditioning system are improved.

[0143] In some embodiments, after the controller controls the compressor to stop working, Figure 8 As shown, the method further comprises the following steps:

[0144] S201. After controlling the compressor to stop working, sending an alarm message to the wire controller.

[0145] By the above Figure 2 From the description of the wire controller, it can be seen that the wire controller includes a display.

[0146] It can be understood that when the controller determines that the shut-off device of the air-conditioning system is in the closed state, in order to enable the user to promptly know that the shut-off device of the air-conditioning system is in the closed state, after the controller controls the compressor to stop working, the controller can also send an alarm message to the wire controller so that the display of the wire controller displays the alarm message, and the alarm message is used to indicate that the shut-off device of the air-conditioning system is in an abnormal state.

[0147] Exemplarily, the content of the alarm information may be “Stop valve abnormality!”.

[0148] It should be noted that the embodiments of the present application do not limit the form in which the controller issues the warning information. In some embodiments, the air conditioning system further includes a voice prompt device. After the controller controls the compressor to stop working, the controller can also control the voice prompt device to play the above-mentioned warning information to prompt the user that the cut-off device of the air conditioning system is in an abnormal state.

[0149] The above embodiments focus on how the controller determines whether the cut-off device of the air conditioning system is in an abnormal state according to the operating parameters of the air conditioning system and the description after determining that the cut-off device of the air conditioning system is in an abnormal state. In some embodiments, when the controller sends an alarm message to the wire controller, such as Fig. 9 As shown, the method further comprises the following steps:

[0150] S301, recording the number of times warning information is sent to the wire controller.

[0151] In some embodiments, in order to avoid the occurrence of dangerous situations due to the user ignoring the warning information displayed on the display of the wire controller and failing to take corresponding measures for the abnormal state of the cut-off device of the air-conditioning system, when the controller sends an alarm message to the wire controller, the controller can also record the number of times the alarm message is sent to the wire controller, and store the recorded number of times the alarm message is sent in a memory.

[0152] S302: When it is detected that the number of times the alarm information is sent to the wire controller reaches a preset number, the air conditioning system is locked and a maintenance information is sent.

[0153] It can be understood that when it is detected that the number of times the alarm information is sent to the wire controller reaches the preset number of times, it means that the controller has sent alarm information to the wire controller for multiple times to prompt that the air-conditioning system's cut-off device is in an abnormal state, and the user has not made relevant processing for the abnormal state of the air-conditioning system's cut-off device. In order to avoid the occurrence of dangerous situations due to the user ignoring the alarm information, the controller locks the air-conditioning system and issues a maintenance message when it detects that the number of times the alarm information is sent to the wire controller reaches the preset number of times, wherein the preset number of times can be pre-set when the air-conditioning system leaves the factory, for example, the preset number of times is 3 times. That is, when the controller detects that the number of times the alarm information is sent to the wire controller reaches 3 times, it locks the air-conditioning system and issues a maintenance message, and the maintenance message is used to instruct to repair the cut-off device of the air-conditioning system.

[0154] Exemplarily, the content of the maintenance information may be “Please inspect the cut-off device of the air conditioning system.”.

[0155] It should be understood that after the controller locks the air-conditioning system, the air-conditioning system cannot be started normally, thus avoiding the occurrence of dangerous situations due to the air-conditioning system's cut-off device being missed. And after locking the air-conditioning system, when the user uses the air-conditioning system again, since the air-conditioning system cannot be started normally, the user will check the working status of the air-conditioning system through the wire controller, and then notice the maintenance information displayed on the display of the wire controller, and then deal with the air-conditioning system's cut-off device in a targeted manner according to the maintenance information, thereby improving the maintenance efficiency of the air-conditioning system.

[0156] The following is an example of a control method for an air conditioning system provided by an embodiment of the present application. Fig.10 Shown is a schematic diagram of the overall flow of a method for controlling an air-conditioning system provided in the present application according to an exemplary embodiment.

[0157] like Fig.10 As shown, after the air-conditioning system is turned on, when the number of times N that the air-conditioning system sends out an alarm message is equal to 0, if the air-conditioning system is in a cooling mode or a dehumidification mode, it is determined whether a first preset condition is met according to the operating parameters of the air-conditioning system. The first preset condition includes that the operating frequency of the compressor is above a first frequency threshold, the operating current value of the compressor is below a first preset current value, the operating time of the compressor is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference. If any one of the above-mentioned first preset conditions is not met, the operating parameters of the air-conditioning system are obtained again after the air-conditioning system has been running for 10 seconds to determine whether the first cut-off device and / or the second cut-off device of the air-conditioning system are in a closed state.

[0158] Similarly, if the air conditioning system is in the heating mode, it is determined whether the second preset condition is met according to the operating parameters of the air conditioning system, that is, it is determined that the operating frequency of the compressor is above the second frequency threshold, the operating current value of the compressor is below the second preset current value, the temperature difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below the third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below the fourth preset difference. If any of the second preset conditions is not met, the operating parameters of the air conditioning system are obtained again after the air conditioning system runs for 10 seconds to determine whether the second preset condition is met.

[0159] When the second preset condition is met, if the third preset condition or the fourth preset condition is met, it is determined that the first cut-off device and / or the second cut-off device is in the closed state. Figure 1 As shown, the third preset condition includes: the operation time of the compressor is less than the first preset time and the exhaust superheat of the compressor is above the first superheat threshold. If any one of the third preset conditions is not met, the operation parameters of the air conditioning system are obtained again after the air conditioning system runs for 10 seconds to determine whether the third preset condition is met.

[0160] The fourth preset condition includes: the operation time of the compressor is less than the second preset time, and the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold. If any one of the fourth preset conditions is not met, the operation parameters of the air-conditioning system are obtained again after the air-conditioning system runs for 10 seconds to determine whether the fourth preset condition is met.

[0161] When it is determined that the first preset condition is met, or when it is determined that the second preset condition is met, and the third preset condition or the fourth preset condition is met, it is determined that the first cut-off device and / or the second cut-off device of the air-conditioning system is in the closed state, and then the compressor is controlled to stop working, an alarm message is sent to the wire controller, and the number of times the alarm message is sent to the wire controller is recorded. When it is detected that the number of times the alarm message is sent to the wire controller is greater than the preset number (for example, 3 times), the air-conditioning system is locked and a maintenance message is issued. After the installer confirms the state of the cut-off device, the air-conditioning system state can be restored by powering on again.

[0162] in, Fig.10 Where △Tn is the difference between the temperature of the indoor environment and the temperature of the indoor coil, |△Tw| is the absolute value of the difference between the temperature of the outdoor environment and the temperature of the outdoor coil, N is the number of times the alarm information is sent to the wire controller, -△Tn is the difference between the temperature of the indoor coil and the temperature of the indoor environment, and DSH is the exhaust superheat of the compressor.

[0163] It can be seen that the above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to achieve the above functions, the embodiment of the present application provides a hardware structure and / or software module corresponding to each function. It should be easily appreciated by those skilled in the art that, in combination with the modules and algorithm steps of each example described in the embodiment disclosed herein, the embodiment of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0164] The embodiment of the present application can divide the controller into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. Optionally, the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0165] The present application also provides a hardware structure diagram of a controller, such as Fig.11 As shown, the controller 3000 includes a processor 3001, and optionally, further includes a memory 3002 and a communication interface 3003 connected to the processor 3001. The processor 3001, the memory 3002 and the communication interface 3003 are connected via a bus 3004.

[0166] Processor 3001 may be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 3001 may also be any other device having a processing function, such as a circuit, a device, or a software module. Processor 3001 may also include multiple CPUs, and processor 3001 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0167] The memory 3002 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store 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 disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, and the present embodiment of the application does not impose any restrictions on this. The memory 3002 may exist independently or be integrated with the processor 3001. Among them, the memory 3002 may contain a computer program code. The processor 3001 is used to execute the computer program code stored in the memory 3002, thereby realizing the fault location method provided in the embodiment of the present application.

[0168] The communication interface 3003 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 3003 can be a module, a circuit, a transceiver or any device capable of achieving communication.

[0169] The bus 3004 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 3004 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0170] An embodiment of the present application further provides a computer-readable storage medium, which includes computer-executable instructions. When the computer-executable instructions are executed on a computer, the computer executes the air-conditioning system control method provided in the above embodiment.

[0171] The embodiment of the present application also provides a computer program product, which can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the air conditioning system control method provided in the above embodiment.

[0172] Those skilled in the art should be aware that in one or more of the above examples, the functions described in this application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0173] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0174] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be a physical unit or multiple physical units, that is, it may be located in one place, or it may be distributed in multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0175] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk.

[0176] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air conditioning system, include: The compressor is used to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharge it to the condenser; An outdoor heat exchanger and an indoor heat exchanger, one of which works as a condenser and the other works as an evaporator; A four-way valve is used to achieve mutual conversion between cooling and heating of the air conditioning system by changing the flow direction of the refrigerant in the system pipeline; A refrigerant circulation loop, wherein the refrigerant circulates in a loop composed of the compressor, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger; A first cut-off device, disposed on a first pipeline between the outdoor heat exchanger and the indoor heat exchanger, for controlling the connection and cut-off of the refrigerant flowing through the first pipeline; A second cut-off device, disposed on the second pipeline between the indoor heat exchanger and the four-way valve, for controlling the connection and cut-off of the refrigerant flowing through the second pipeline; A controller, used to instruct the air conditioning system to execute a control instruction; A first temperature sensor is disposed at the exhaust port of the compressor and is used to detect the exhaust temperature value of the compressor; The second temperature sensor is used to detect the temperature value of the outdoor coil; The third temperature sensor is used to detect the outdoor environment temperature value; A fourth temperature sensor, used to detect the temperature value of the indoor coil; The fifth temperature sensor is used to detect the indoor environment temperature value; Characterized in that the controller is configured as follows: When the air conditioning system is in operation, determining whether the first cut-off device and / or the second cut-off device is in a closed state according to the operation parameters of the air conditioning system; The operating parameters include at least one of the following parameters: the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, the working current value of the compressor, the operating frequency of the compressor and the operating time of the compressor; wherein the exhaust superheat of the compressor is the difference between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil; When it is determined that the first cut-off device and / or the second cut-off device is in a closed state, controlling the compressor to stop working; Wherein, when the controller is configured to determine whether the first cut-off device and / or the second cut-off device is in a closed state according to the operating parameters of the air-conditioning system, it is specifically configured as follows: If the air-conditioning system is in cooling mode or dehumidification mode, the first cut-off device and / or the second cut-off device are determined to be in a closed state when a first preset condition is met; the first preset condition includes: the operating frequency of the compressor is above a first frequency threshold, the working current value of the compressor is below a first preset current value, the operating time of the compressor is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference.

2. The air conditioning system according to claim 1, It is characterized in that When the controller is configured to determine whether the first cut-off device and / or the second cut-off device is in a closed state according to the operating parameters of the air-conditioning system, the controller is specifically configured as follows: If the air conditioning system is in the heating mode, when the second preset condition is met, if the third preset condition or the fourth preset condition is met, it is determined that the first cut-off device and / or the second cut-off device is in the closed state; The second preset condition includes: the operating frequency of the compressor is above a second frequency threshold, the operating current value of the compressor is below a second preset current value, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below a third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a fourth preset difference; The third preset condition includes: the operation time of the compressor is less than the first preset time and the exhaust gas superheat of the compressor is above the first superheat threshold; The fourth preset condition includes: the operating time of the compressor is less than the second preset time, the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold, and the second superheat threshold is less than the third superheat threshold.

3. The air conditioning system according to claim 1 or 2, It is characterized in that The air conditioning system further comprises: A wire controller, the wire controller comprising a display; After the controller is configured to control the compressor to stop working, the controller is further configured to: Sending warning information to the wire controller so that a display of the wire controller displays the warning information, wherein the warning information is used to indicate that the cut-off device of the air conditioning system is in an abnormal state.

4. The air conditioning system according to claim 3, It is characterized in that The controller is also configured to: Recording the number of times the alarm information is sent to the wire controller; When it is detected that the number of times the alarm information is sent to the wire controller reaches a preset number, the air conditioning system is locked and a maintenance message is sent, wherein the maintenance message is used to instruct to perform maintenance on the cut-off device of the air conditioning system.

5. A method for controlling an air conditioning system, It is characterized in that The method is applied to the air conditioning system described in any one of claims 1 to 4, and the method comprises: When the air-conditioning system is in operation, whether the first cut-off device and / or the second cut-off device is in a closed state is determined according to the operation parameters of the air-conditioning system; the operation parameters of the air-conditioning system include at least one of the following parameters: the difference between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat of the compressor, the working current value of the compressor, the operating frequency of the compressor and the operating time of the compressor; wherein the exhaust superheat of the compressor is the difference between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil; When it is determined that the first cut-off device and / or the second cut-off device is in a closed state, controlling the compressor to stop working; Wherein, determining whether the first cut-off device and / or the second cut-off device is in a closed state according to the operating parameters of the air conditioning system includes: If the air-conditioning system is in cooling mode or dehumidification mode, the first cut-off device and / or the second cut-off device are determined to be in a closed state when a first preset condition is met, and the first preset condition includes: the operating frequency of the compressor is above a first frequency threshold, the operating current value of the compressor is below a first preset current value, the operating time of the compressor is below a first preset time, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference.

6. The method according to claim 5, It is characterized in that The step of determining whether the first cut-off device and / or the second cut-off device is in a closed state according to the operating parameters of the air conditioning system comprises: If the air conditioning system is in the heating mode, when the second preset condition is met, if the third preset condition or the fourth preset condition is met, it is determined that the first cut-off device and / or the second cut-off device is in the closed state; The second preset condition includes: the operating frequency of the compressor is above a second frequency threshold, the operating current value of the compressor is below a second preset current value, the difference between the temperature value of the indoor coil and the temperature value of the indoor environment is below a third preset difference, and the absolute value of the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a fourth preset difference; The third preset condition includes: the operation time of the compressor is less than the first preset time and the exhaust gas superheat of the compressor is above the first superheat threshold; The fourth preset condition includes: the operating time of the compressor is less than the second preset time, the exhaust superheat of the compressor is between the second superheat threshold and the third superheat threshold, and the second superheat threshold is less than the third superheat threshold.

7. The method according to claim 5 or 6, It is characterized in that After controlling the compressor to stop working, the method further includes: Sending warning information to the wire controller so that a display of the wire controller displays the warning information, wherein the warning information is used to indicate that the cut-off device of the air conditioning system is in an abnormal state.

8. The method according to claim 7, It is characterized in that The method further comprises: Recording the number of times the alarm information is sent to the wire controller; When it is detected that the number of times the alarm information is sent to the wire controller reaches a preset number, the air conditioning system is locked and a maintenance message is sent, wherein the maintenance message is used to instruct to perform maintenance on the cut-off device of the air conditioning system.

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