CN115899960A

CN115899960A - Air conditioning system and control method

Info

Publication number: CN115899960A
Application number: CN202211501134.2A
Authority: CN
Inventors: 孙楠楠; 赵海潞; 王树涛; 石鑫; 蒋贤国
Original assignee: Hisense Air Conditioning Co Ltd
Current assignee: Hisense Air Conditioning Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-04

Abstract

The embodiment of the application provides an air conditioning system and a control method, relates to the technical field of air conditioners, and is used for realizing automatic identification of the state of a cut-off device of the air conditioning system. This air conditioning system includes: the refrigerant circulating loop, the first cut-off device and the second cut-off device; a controller configured to: determining 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; and controlling the compressor to stop working when the first cut-off device and/or the second cut-off device is determined to be in the closed state. The operation parameters comprise a difference value between a temperature value of the indoor environment and a temperature value of the indoor coil, an absolute value of a difference value between a temperature value of the outdoor environment and a temperature value of the outdoor coil, a difference value between a temperature value of the indoor coil and a temperature value of the indoor environment, the exhaust superheat degree of the compressor, the working current value of the compressor, the operation frequency of the compressor and the operation duration of the compressor.

Description

Air conditioning system and control method

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioning system and a control method.

Background

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

In the process of installing the air conditioner, an event that a cut-off device of the air conditioning system is leaked due to the fact that operation of an installer is not standard occurs sometimes. Starting the air conditioning system under the closing state of the cut-off device, if so, the compressor can run in short of oil, the high-temperature demagnetization of the coil in the compressor is caused, if so, the local pressure of the pipeline can exceed the upper limit, the explosion is caused, and the economic loss and the safety risk are caused for users and installation personnel.

Disclosure of Invention

The application provides an air conditioning system and a control method, which are used for automatically identifying the state of a cut-off device of the air conditioning system.

In a first aspect, an embodiment of the present application provides an air conditioning system, including:

the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;

one of the outdoor heat exchanger and the indoor heat exchanger works as a condenser, and the other one works as an evaporator;

the four-way valve is used for realizing the interconversion between the refrigeration and the heating of the air-conditioning system by changing the flow direction of a refrigerant in a system pipeline;

the refrigerant circulation loop is used for circulating the refrigerant in a loop formed by the compressor, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger;

the first cut-off device is arranged on a first pipeline between the outdoor heat exchanger and the indoor heat exchanger and is used for controlling the communication and the cut-off of the refrigerant flowing through the first pipeline;

the second stopping device is arranged on a second pipeline between the indoor heat exchanger and the four-way valve and is used for controlling the communication and the stopping of the refrigerant flowing through the second pipeline;

the controller is used for indicating the air conditioning system to execute a control instruction;

the first temperature sensor is arranged at an exhaust port of the compressor and used for detecting the exhaust temperature value of the compressor;

the second temperature sensor is used for detecting the temperature value of the outdoor coil pipe;

a third temperature sensor for detecting an outdoor ambient temperature value;

the fourth temperature sensor is used for detecting the temperature value of the indoor coil pipe;

a fifth temperature sensor for detecting an indoor ambient temperature value;

the controller is configured to:

determining 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;

the operating parameters include at least one of the following parameters: the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat degree of the compressor, the working current value of the compressor, the running frequency of the compressor and the running duration of the compressor are obtained; the exhaust superheat degree of the compressor is the difference value between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

and controlling the compressor to stop working when the first cut-off device and/or the second cut-off device is determined to be in the closed state.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects: aiming at the problem that the state of a cut-off device of an air conditioning system cannot be automatically identified at present, the air conditioning system provided by the embodiment of the application identifies whether the cut-off device of the air conditioning system is in a closed state or not according to the operating parameters of the air conditioning system, and controls a compressor to stop working when any cut-off device of the air conditioning system is identified to be in the closed state, so that the dangerous condition caused by the leakage of the cut-off device is avoided. The state of the cut-off device of the air conditioning system is automatically identified, and meanwhile, the safety and the intelligent degree of the air conditioning system are improved.

In some embodiments, the air conditioning system further includes an indoor fan and an outdoor fan, and the controller controls the indoor fan and the outdoor fan to stop operating while the controller controls the compressor to stop operating.

In some embodiments, the controller, when being configured to determine whether the first cut-off device and/or the second cut-off device is in the off state according to the operation parameter of the air conditioning system, is specifically configured to: if the air conditioning system is in a refrigeration mode or a 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 are/is in a closed state; the first preset condition includes: the operation frequency of the compressor is above a first frequency threshold value, the working current value of the compressor is below a first preset current value, the operation time of the compressor is below a first preset time, the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference value.

In some embodiments, the controller, when being configured to determine whether the first cutoff device and/or the second cutoff device is in the off state according to the operation parameter of the air conditioning system, is specifically configured to: if the air conditioning system is in a heating mode, under the condition that a second preset condition is met, if a third preset condition or a fourth preset condition is met, determining that the first stopping device and/or the second stopping device are/is in a closed state;

the second preset condition includes: the operation frequency of the compressor is above a second frequency threshold value, the working current value of the compressor is below a second preset current value, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment is below a third preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a fourth preset difference value;

the third preset condition includes: the running time of the compressor is below a first preset time and the exhaust superheat degree of the compressor is above a first superheat degree threshold;

the fourth preset condition includes: the operation time of the compressor is below a second preset time, the exhaust superheat degree of the compressor is between a second superheat degree threshold value and a third superheat degree threshold value, and the second superheat degree threshold value is below the third superheat degree threshold value.

In some embodiments, the air conditioning system further comprises: the wire controller comprises a display; a controller configured to control the compressor to stop operating, the controller being further configured to: and sending alarm information to the wire controller so that a display of the wire controller displays the alarm information, wherein the alarm information is used for indicating that a cut-off device of the air conditioning system is in an abnormal state.

In some embodiments, the controller is further configured to: recording the times of sending alarm information to the wire controller; and when the frequency of sending the alarm information to the wire controller reaches the preset frequency, locking the air conditioning system and sending out maintenance information, wherein the maintenance information is used for indicating the maintenance of a cut-off device of the air conditioning system.

In a second aspect, an embodiment of the present application provides a control method of an air conditioning system, including:

when the air conditioning system is in the running state, determining whether the first cut-off device and/or the second cut-off device are/is in the closing state according to the running parameters of the air conditioning system;

the operating parameters of the air conditioning system include at least one of the following parameters: the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat degree of the compressor, the working current value of the compressor, the running frequency of the compressor and the running duration of the compressor; the exhaust superheat degree of the compressor is the difference value between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

In some embodiments, the method comprises: if the air conditioning system is in a refrigeration mode or a dehumidification mode, under the condition that a first preset condition is met, the first cut-off device and/or the second cut-off device is determined to be in a closed state, wherein the first preset condition comprises the following steps: the operation frequency of the compressor is above a first frequency threshold value, the working current value of the compressor is below a first preset current value, the operation time of the compressor is below a first preset time, the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference value.

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

In some embodiments, after controlling the compressor to stop operating, the method further comprises: and sending alarm information to the wire controller so that a display of the wire controller displays the alarm information, wherein the alarm information is used for indicating that a cut-off device of the air conditioning system is in an abnormal state.

In some embodiments, the method further comprises: recording the times of sending alarm information to the wire controller; and when the frequency of sending the alarm information to the wire controller reaches the preset frequency, locking the air conditioning system and sending out maintenance information, wherein the maintenance information is used for indicating the maintenance of a cut-off device of the air conditioning system.

In a third aspect, an embodiment of the present application provides a controller, including: one or more processors; one or more memories; wherein the one or more memories are configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the controller to perform any of the methods of controlling an air conditioning system of the second aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, where the computer-readable storage medium includes computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute any one of the control methods of the air conditioning system provided in the second aspect.

In a fifth aspect, the present application provides a computer program product, which is directly loadable into a memory and contains software codes, and which, when loaded and executed by a computer, is capable of implementing any one of the control methods of the air conditioning system as provided in the second aspect.

It should be noted that all or part of the computer instructions may be stored on the computer readable storage medium. The computer readable storage medium may be packaged with or separately from a processor of the controller, which is not limited in this application.

For the beneficial effects described in the second aspect to the fifth aspect in the present application, reference may be made to the beneficial effect analysis of the first aspect, which is not described herein again.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a schematic composition diagram of an air conditioning system according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a controller according to an embodiment of the present disclosure;

fig. 4 is a block diagram of a hardware configuration of an air conditioning system according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of a control method of an air conditioning system according to an embodiment of the present disclosure;

fig. 6 is a schematic flowchart of another control method for an air conditioning system according to an embodiment of the present disclosure;

fig. 7 is a schematic flowchart of another control method for an air conditioning system according to an embodiment of the present disclosure;

fig. 8 is a schematic flowchart of another control method for an air conditioning system according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart of another control method for an air conditioning system according to an embodiment of the present disclosure;

fig. 10 is a schematic overall flowchart of a control method of an air conditioning system according to an embodiment of the present application;

fig. 11 is a schematic hardware structure diagram of a controller according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the present embodiment are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

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

In the description of the present application, it is to be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In addition, when a pipeline is described, the terms "connected" and "connecting" are used in this application to mean conducting. The specific meaning is to be understood in conjunction with the context.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

At present, in order to prevent explosion caused by ignition of electric devices, a shell temperature protector is omitted from R32 refrigerant compressors in the whole industry, and air-conditioning products with power of 3 or less are not provided with high-pressure and low-pressure switches. However, in the process of installing the air conditioner, an event that the cutoff device is leaked due to the fact that operation of an installer is not standardized occurs sometimes. Starting the air conditioning system under the closing state of the cut-off device, if so, the compressor can run in the absence of oil, the high-temperature demagnetization of the coil in the compressor is caused, if so, the local pressure of the pipeline can exceed the upper limit, even the pipeline explodes, and the air conditioning system can cause economic loss and bring safety risk to users and installation personnel.

Based on this, the embodiment of the application provides an air conditioning system and a control method, the state of a cut-off device of the air conditioning system is automatically identified by comparing the operating parameters of the air conditioning system with preset conditions, the automatic identification of the state of the cut-off device of the air conditioning system is realized, and when any cut-off device of the air conditioning system is determined to be in a closed state, the compressor is controlled to stop working, so that the dangerous situation caused by the leakage of the cut-off device is avoided, and the safety of the air conditioning system and the intelligent degree of the air conditioning system are improved.

For the convenience of understanding, a brief introduction and description will be made to some basic concepts of terms or techniques related to the embodiments of the present application.

Refrigerant: a substance which is easily changed into gas by heat absorption and liquid by heat release. In an air conditioning system, heat energy is transferred by evaporation and condensation of a refrigerant.

A refrigeration mode: the compressor of the air conditioning system sucks the low-temperature and low-pressure gaseous refrigerant evaporated by the evaporator into a compressor cavity, compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and then enters the condenser. The high-temperature high-pressure gas refrigerant is condensed into a high-temperature high-pressure liquid refrigerant in the condenser, then the high-temperature high-pressure liquid refrigerant passes through a throttling element such as an electronic expansion valve to be changed into a low-temperature low-pressure liquid refrigerant, enters the evaporator to be evaporated, and finally returns to the compressor, so that the whole refrigeration cycle is completed. The outdoor heat exchanger in the cooling mode is used as a condenser, and the indoor heat exchanger is used as an evaporator.

Heating mode: the compressor of the air conditioning system sucks the low-temperature and low-pressure gaseous refrigerant evaporated by the evaporator into a compressor cavity, compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, and enters the condenser. The high-temperature high-pressure gas refrigerant is condensed into a high-temperature high-pressure liquid refrigerant in the condenser, then passes through a throttling element such as an electronic expansion valve to be changed into a low-temperature low-pressure liquid refrigerant, enters the evaporator to be evaporated, and finally returns to the compressor, so that the whole refrigeration cycle is completed. The outdoor heat exchanger in the heating mode is used as an evaporator, and the indoor heat exchanger is used as a condenser.

Fig. 1 is a schematic composition diagram of an air conditioning system according to an exemplary embodiment of the present application, and it should be noted that the air conditioning system according to the embodiment of the present application may be different types of air conditioning systems, for example, a common air conditioning system including an indoor unit and an outdoor unit, or a multi-split air conditioning system commonly called "one split multiple", where the different types of air conditioning systems are illustrated by taking the schematic composition diagram of the air conditioning system shown in fig. 1 as an example. As shown in fig. 1, the air conditioning system 10 includes an outdoor unit 14 and an indoor unit 13.

The indoor unit 13 is exemplified by the indoor unit 13 as an on-hook, and the on-hook is usually attached to an indoor wall surface or the like. For another example, the indoor cabinet is also an indoor unit form of the indoor unit.

The outdoor unit 14 is generally installed outdoors and used for heat exchange in an indoor environment. In the illustration of fig. 1, the outdoor unit 14 is indicated by a broken line because the outdoor unit 14 is located outdoors on the opposite side of the indoor unit 13 with respect to the wall surface.

Specifically, fig. 2 is a schematic structural diagram of an air conditioning system according to an exemplary embodiment of the present application. 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 (not shown in fig. 2), and a line controller 51 (not shown in fig. 2).

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

In some embodiments, two ends of the compressor 11 are connected to two ports of the four-way valve 12, and are used for compressing a 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.

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

In some embodiments, the controller 50 may obtain the operating current value of the compressor 11 at each time, the operating frequency of the compressor at each time, and the operating duration of the compressor after each turn-on.

In some embodiments, as shown in fig. 2, 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 blocking device 24. The four-way valve 12 is used for realizing interconversion between refrigeration and heating by changing the flow direction of a refrigerant in a system pipeline.

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, i.e., an outdoor coil.

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

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, i.e., an indoor coil.

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

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

And the second temperature sensor 18 is arranged on the outdoor coil pipe and used for detecting the temperature value of the outdoor coil pipe and sending the temperature value of the outdoor coil pipe to the controller 50.

The third temperature sensor 19 is disposed on the outdoor unit 14, and configured to detect an outdoor environment temperature value, which is an environment temperature value of the outdoor unit 14, and send the outdoor environment temperature value to the controller 50.

And the fourth temperature sensor 20 is arranged on the indoor coil pipe and used for detecting the temperature value of the indoor coil pipe and sending the temperature value of the indoor coil pipe to the controller 50.

And the fifth temperature sensor 21 is disposed on the indoor unit 13, and configured to detect an ambient temperature value of the indoor unit 13, that is, an indoor ambient temperature value, and send the indoor ambient temperature value to the controller 50.

In some embodiments, the throttling device 22 may expand and decompress the refrigerant flowing through the throttling device 22, and may be used to adjust the supply amount of the refrigerant in the pipe.

In some embodiments, the restriction 22 may be an electronic expansion valve.

When the expansion device 22 is an electronic expansion valve, if the opening degree of the electronic expansion valve is decreased, the flow path resistance of the refrigerant passing through the electronic expansion valve increases. When the opening degree of the electronic expansion valve is increased, the flow path resistance of the refrigerant passing through the electronic expansion valve is decreased. In this way, even if the state of other components in the circuit does not change, the flow rate of the refrigerant flowing to the indoor unit 13 changes when the opening degree of the electronic expansion valve changes.

In some embodiments, the first cut-off device 23 is disposed in the first pipeline between the outdoor heat exchanger 15 and the indoor heat exchanger 16, and is configured to control communication and cut-off of the refrigerant flowing through the first pipeline.

Wherein the first line may be referred to as a liquid line.

In some embodiments, the second blocking device 24 is disposed in the second pipeline between the indoor heat exchanger 16 and the four-way valve 12, and is configured to control communication and blocking of the refrigerant flowing through the second pipeline.

Wherein the first conduit may be referred to as a trachea.

In some embodiments, the first cut-off device 23 and the second cut-off device 24 may each be a cut-off valve, wherein the first cut-off device 23 may be a liquid cut-off valve and the second cut-off device 24 may be a gaseous cut-off valve. The stop valve makes the sealing surface of the valve clack and the sealing surface of the valve seat tightly fit by means of the pressure of the valve rod, and prevents the medium from flowing.

In the illustrated embodiment of the present application, the controller 50 is a device that can generate an operation control signal according to the command operation code and the timing signal, and instruct the air conditioning system to execute the control command. The controller may be a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The controller may also be other devices with processing functions, such as a circuit, a device, or a software module, which is not limited in any way by the embodiments of the present application.

In addition, the controller 50 may be used to control the operation of various components within the interior of the air conditioning system 10 such that the various components of the air conditioning system 10 operate to perform various predetermined functions of the air conditioning system.

Fig. 3 is a schematic structural diagram of a controller according to an embodiment of the present disclosure. As shown in fig. 3, 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 with the outdoor control module 501 through wired or wireless communication. The outdoor control module 501 may be installed in the outdoor unit 14, or may be independent of the outdoor unit 14, and is used for controlling the outdoor unit 14 to perform related operations. The indoor control module 502 may be installed in the indoor unit 13, or may be independent of the indoor unit 13, and is used for controlling components of the indoor unit 13 and the throttling device 22 to perform related operations. It should be understood that the above division of the modules is only a division of functionality, and the outdoor control module 501 and the indoor control module 502 may also be integrated into one module. The first memory 5011 and the second memory 5021 may also be integrated into one memory.

In some embodiments, the first memory 5011 is used to store applications and data related to the outdoor unit 14, and the outdoor control module 501 performs various functions of the air conditioning system and data processing by operating 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 may store an operating system, an application program required for at least one function; the storage data area may store data created according to 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 nonvolatile memory such as a magnetic disk storage device, a flash memory device, or other volatile solid state storage device.

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

In some embodiments, the outdoor control module 501 is in communication with the outdoor unit 14, and is configured to control the outdoor unit to perform related operations according to a user instruction or a system default instruction. Alternatively, the outdoor control module 501 may also acquire the outdoor ambient temperature according to a user instruction or a system instruction, and store the acquired outdoor ambient temperature to the first memory 5011. Alternatively, the outdoor control module 501 may also control the four-way valve 12 in the outdoor unit 14 to rotate according to the air-conditioning operation mode selected by the user, so as to implement the selection of the cooling or heating mode.

In some embodiments, a communication connection exists between the indoor control module 502 and the indoor unit 13, and is used for controlling the indoor unit 13 to perform related operations according to a user instruction or a system default instruction. 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 instruction. Optionally, the indoor control module 502 may also control the indoor unit to turn on or off a compressor in the indoor unit according to a user instruction. Optionally, the indoor control module 502 may further control the indoor unit to turn on a fifth temperature sensor according to a user instruction, so as to detect the indoor environment temperature.

In some embodiments, a communication link exists between the indoor control module 502 and the throttle device 22 for controlling the throttle device 22 to perform related operations based on user instructions or system default instructions. Optionally, the indoor control module 502 may also control the opening of the throttling device 22 according to a user command or a system command.

In some embodiments, the air conditioning system 10 also has attached thereto a wired controller 51, the wired controller 51 having functionality to communicate with the controller 50, for example, using infrared or other communication means. The line controller 51 is used for various controls that the user can control the air conditioning system, and realizes interaction between the user and the air conditioning system 10.

In some embodiments, the line controller 51 includes a display for displaying a control panel of the air conditioning system 10 and displaying the current operating state of the air conditioning system 10, such as displaying the current operating mode and the set indoor temperature.

Referring to fig. 4, a hardware configuration block diagram of an air conditioning system according to an embodiment of the present application is provided. The air conditioning system 10 may further include: a communicator 25 and a memory 26.

In some embodiments, communicator 25 is coupled to controller 50 for establishing communication connections with other network entities, such as terminal devices. The communicator 25 may include a Radio Frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, a GPS module, and the like. Taking the RF module as an example, the RF module can be used for receiving and transmitting signals, and particularly, transmitting the received information to the controller 50 for processing; in addition, a signal generated by the controller 50 is sent out. In general, 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.

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

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

Those skilled in the art will appreciate that the hardware configuration shown in FIG. 2 does not constitute a limitation of the air conditioning system, which may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

As shown in fig. 5, an embodiment of the present application provides an air conditioning system and a control method, where the method is applied to a controller, where the controller may be the controller 50 in the air conditioning system shown in fig. 2, and the method includes:

s101, when the air conditioning system is in the running state, whether the first cut-off device and/or the second cut-off device are/is in the closing state is determined according to the running parameters of the air conditioning system.

In some embodiments, to avoid a dangerous situation caused by the leakage of the shut-off device of the air conditioning system, the controller detects the operation parameters of the air conditioning system in real time through various sensors while the air conditioning system is in an operation state. And determining whether the first cut-off device and/or the second cut-off device is in a closed state according to an operating parameter of the air conditioning system.

Wherein the operating parameters of the air conditioning system comprise at least one of the following parameters: the air-conditioning system comprises a compressor, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a controller and a controller, wherein the compressor is used for detecting the exhaust temperature value of the compressor, the temperature value of the outdoor coil detected by the first temperature sensor, the outdoor environment detected by the third temperature sensor, the temperature value of the indoor coil detected by the fourth temperature sensor, the indoor environment temperature value detected by the fifth temperature sensor, the difference value between the indoor environment temperature value and the indoor coil temperature value, the absolute value of the difference value between the outdoor environment temperature value and the outdoor coil temperature value, the difference value between the indoor coil temperature value and the indoor environment temperature value, the exhaust superheat degree of the compressor, the working current value of the compressor reported to the controller by the compressor when the air-conditioning system is in an operating state, the operating frequency of the compressor and the operating time length of the compressor.

The exhaust superheat degree of the compressor is the difference value between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

the determination of whether the first cutoff device and/or the second cutoff device is in the off state according to the operation parameters of the air conditioning system with respect to the controller may include the following several cases.

Case 1, the air conditioning system is in a cooling mode or a dehumidification mode.

Optionally, in case 1, as shown in fig. 6, step S101 may be implemented as the following steps:

and S1011, if the air conditioning system is in the refrigeration mode or the dehumidification mode, determining that the first cut-off device and/or the second cut-off device is in the closed state under the condition that a first preset condition is met.

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

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

The first frequency threshold, the first preset current value, the first preset duration, the first preset difference and the second preset difference can be preset when the air-conditioning system leaves a factory.

It is understood that the operating parameter of the air conditioning system can represent an operating state of the air conditioning system during operation, which differs from the operating parameter of the air conditioning system during normal operation in the case of a leak of the first and/or second shut-off device of the air conditioning system, i.e. in the case of a closed state of the first and/or second shut-off device.

With reference to the air conditioning system shown in fig. 2, taking as an example that the second stopping device is in a closed state when the air conditioning system is in the cooling mode, the refrigerant in the air conditioning system is discharged into the outdoor heat exchanger and the indoor heat exchanger through the compressor and is accumulated in the outdoor heat exchanger and the indoor heat exchanger, and after the compressor runs for a preset time (for example, 40 seconds), the refrigerant in the air conditioning system does not flow any more, and the indoor heat exchanger and the outdoor heat exchanger cannot exchange heat. The indoor coil exchanges heat with the indoor environment, 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, the temperature value of the outdoor coil is close to the temperature value of the outdoor environment, and therefore the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil and the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil are listed in the first preset condition.

And under the condition that the refrigerant in the air conditioning system does not flow any more, the compressor continues to operate, but the work of the compressor is less, so that the working current value of the compressor is reduced (namely the working current value of the compressor is below a first preset current value), the exhaust temperature value of the compressor is reduced, and the working current value of the compressor is listed in a first preset condition.

When the first cut-off device is in a closed state or the first cut-off device and the second cut-off device are both in a closed state, the refrigerant in the air conditioning system is accumulated in the outdoor heat exchanger, and the change of the working parameters of the air conditioning system is consistent with the change of the working parameters of the air conditioning system when the second cut-off device is in a closed state.

It should be noted that, when the first and second cut-off devices are both in an open state and the air conditioning system operates in a low frequency mode, the air conditioning system may also have a state in which the temperature value of the indoor coil is close to the indoor environment temperature value, the temperature value of the outdoor coil is close to the outdoor environment temperature value, the temperature of the outdoor coil is close to the outdoor environment temperature value, the work of the compressor is low, the working current value of the compressor is reduced, and the exhaust temperature value of the compressor is reduced in a start-up stage.

In summary, when the air conditioning system is in the cooling mode or the dehumidification mode, in the case that the first preset condition is satisfied, it is determined whether the first cut-off device and/or the second cut-off device of the air conditioning system is in the off state.

Case 2, the air conditioning system is in heating mode.

Optionally, in case 2, as shown in fig. 7, step S101 may be implemented as the following steps:

and S1012, if the air conditioning system is in a heating mode, under the condition that a second preset condition is met, and if a third preset condition or a fourth preset condition is met, determining that the first stopping device and/or the second stopping device are/is in a closed state.

In some embodiments, the second preset condition comprises: the operation frequency of the compressor is above a second frequency threshold value, the working current value of the compressor is below a second preset current value, the temperature difference value between the temperature value of the indoor coil and the temperature value of the indoor environment is below a third preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a fourth preset difference value;

the second frequency threshold, the second preset current value, the third preset difference value and the fourth preset difference value may be preset in the factory of the air conditioning system.

The third preset condition includes: the running time of the compressor is below a first preset time and the exhaust superheat degree of the compressor is above a first superheat degree threshold; the first superheat threshold may be preset when the air conditioning system is shipped from a factory.

The fourth preset condition includes: the operation time of the compressor is below a second preset time, the exhaust superheat degree of the compressor is between a second superheat degree threshold value and a third superheat degree threshold value, the second superheat degree threshold value is below the third superheat degree threshold value, and the second superheat degree threshold value is smaller than the third superheat degree threshold value. The second superheat threshold and the third superheat threshold may be preset in the factory of the air conditioning system.

With reference to the air conditioning system shown in fig. 2, taking as an example that the second cut-off device is in a closed state or both the first cut-off device and the second cut-off device are in a closed state in the heating mode of the air conditioning system, the refrigerant in the air conditioning system is discharged into the E-tube through the compressor, the length of the section of the tube is generally designed to be short, after about 3-5 minutes, the high-pressure value of the air conditioning system rises to the upper safety limit value of the air conditioning system, the discharge temperature value of the compressor increases with the rise of the high-pressure value of the air conditioning system, and the working current value of the compressor rapidly rises at the same time, so that the working current value of the compressor can be listed in the second preset condition.

When the first cut-off device is in a closed state, the refrigerant of the air conditioning system is accumulated 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 are all maintained at a low level. The same as that when the second cut-off device is in the closed state in the refrigeration 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 temperature value of the indoor environment, and the temperature value of the outdoor coil is close to the temperature value of the outdoor environment, and therefore, the temperature difference between the temperature value of the indoor coil and the temperature value of the indoor environment and the difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil can be listed in the second preset condition.

It should be particularly noted that, when the first stopping device and the second stopping device are both in an open state and the air conditioning system operates at a special heating low frequency (the outdoor temperature is low and the indoor temperature is high, such as in a passive room), the temperature value of the indoor coil pipe is close to the indoor environment temperature value when the air conditioning system is in a start-up stage, and the conditions that the temperature value of the outdoor coil pipe is close to the outdoor environment temperature value, the work of the compressor is little, the working current value of the compressor is reduced, and the exhaust temperature value of the compressor is reduced may also occur. Tests confirm that the first stopping device is in a closed state, the second stopping device is in a closed state, and the first stopping device and the second stopping device are both in a closed state, and the exhaust superheat degrees of the compressors are sorted from large to small into the exhaust superheat degree of the compressors when the second stopping device is in a closed state, the exhaust superheat degree of the compressors when the first stopping device and the second stopping device are both in a closed state, the exhaust superheat degree of the compressors when the first stopping device is in a closed state, and the exhaust superheat degree of the compressors when the air conditioning system runs at a special heating low frequency. When the second stopping device is in a closed state or the first stopping device and the second stopping device are both in a closed state, the exhaust temperature value of the compressor can reach a higher level when the air conditioning system runs for about 3 minutes. In order to avoid false alarm in the operation process of the air conditioning system caused by similar working conditions, the operation frequency of the compressor is listed into a second preset condition, and the operation time of the compressor and the exhaust superheat degree of the compressor are listed into a third preset condition and a fourth preset condition.

In summary, if the air conditioning system is in the heating mode, and if the second preset condition is met, and if the third preset condition or the fourth preset condition is met, it is determined that the first stopping device and/or the second stopping device are/is in the off state.

And S102, controlling the compressor to stop working when the first cut-off device and/or the second cut-off device is determined to be in a closed state.

It can be understood that when the first cut-off device and/or the second cut-off device is in a closed state, the refrigerant in the air conditioning system stops flowing, and the indoor heat exchanger and the outdoor heat exchanger cannot complete heat exchange. Therefore, when the first stopping device and/or the second stopping device are in a closed state and the compressor continues to work, the compressor will accumulate heat, so that the temperature is increased, the internal coil of the compressor is demagnetized due to high temperature, the local pressure in the air conditioning system is increased, and the accident is caused. The compressor is controlled to stop operating when it is determined that the first cutoff means and/or the second cutoff means are in the closed state.

In some embodiments, the controller may control the outdoor fan and the indoor fan to stop operating while controlling the compressor to stop operating.

The embodiment based on fig. 5 brings at least the following advantages: aiming at the problem that the state of a cut-off device of an air conditioning system cannot be automatically identified at present, the air conditioning system provided by the embodiment of the application identifies whether the cut-off device of the air conditioning system is in a closed state or not according to the operating parameters of the air conditioning system, and controls a compressor to stop working when any cut-off device of the air conditioning system is identified to be in the closed state, so that the dangerous situation caused by the leakage of the cut-off device is avoided. The state of the cut-off device of the air conditioning system is automatically identified, and meanwhile, the safety of the air conditioning system and the intelligent degree of the air conditioning system are improved.

In some embodiments, after the controller controls the compressor to stop operating, as shown in fig. 8, the method further comprises the steps of:

s201, after the compressor is controlled to stop working, alarm information is sent to the wire controller.

As can be seen from the description of the drive-by-wire in fig. 2 above, the drive-by-wire includes a display.

It can be understood that, when the controller determines that the cut-off device of the air-conditioning system is in the closed state, in order to enable a user to timely know that the cut-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 alarm information to the wire controller, so that the display of the wire controller displays the alarm information, and the alarm information is used for indicating that the cut-off device of the air-conditioning system is in the abnormal state.

For example, the content of the warning message may be "stop valve abnormal! ".

It should be noted that, the embodiment of the present application does not limit the form of the alarm information sent by the controller. In some embodiments, the air conditioning system further comprises a voice prompt device, and after the controller controls the compressor to stop working, the controller can further control the voice prompt device to play the alarm information to prompt a user that a cut-off device of the air conditioning system is in an abnormal state.

The above embodiments focus on the description of how the controller judges whether the cut-off device of the air conditioning system is in an abnormal state according to the operation 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, and in some embodiments, while the controller sends the alarm information to the line controller, as shown in fig. 9, the method further includes the steps of:

s301, recording the times of sending the alarm information to the line controller.

In some embodiments, in order to avoid the occurrence of a dangerous situation caused by the fact that the user ignores the alarm information displayed on the display of the line controller and does not perform corresponding processing on the abnormal state of the cut-off device of the air conditioning system, when the controller sends the alarm information to the line controller, the controller may further record the number of times of sending the alarm information to the line controller and store the recorded number of times of sending the alarm information into the memory.

S302, when the times of sending the alarm information to the wire controller reach the preset times, locking the air conditioning system and sending out maintenance information.

It can be understood that when the number of times of sending the alarm information to the line controller is detected to reach the preset number of times, the alarm information for prompting that the cut-off device of the air conditioning system is in the abnormal state is sent to the line controller for multiple times by representing that the controller does not perform relevant processing on the condition that the cut-off device of the air conditioning system is in the abnormal state. In order to avoid the occurrence of a dangerous situation caused by the fact that a user ignores the alarm information, when the controller detects that the number of times of sending the alarm information to the wire controller reaches a preset number of times, the controller locks the air conditioning system and sends out the maintenance information, wherein the preset number of times can be preset when the air conditioning system leaves a factory, and for example, the preset number of times is 3. That is, when the controller detects that the number of times of sending the alarm information to the wire controller reaches 3 times, the air conditioning system is locked, and the maintenance information is sent out and used for indicating the maintenance of the cut-off device of the air conditioning system.

Illustratively, the content of the service information may be "please service the cut-off device of the air conditioning system. ".

It should be understood that after the controller locks the air conditioning system, the air conditioning system cannot be started normally, and the dangerous situation caused by the leakage of a stopping device of the air conditioning system is avoided. And after locking air conditioning system, when the user used air conditioning system again, because air conditioning system can't normally start, the user can look over air conditioning system's operating condition through the drive-by-wire ware, and then can notice the maintenance information that shows on the display of drive-by-wire ware, and then has handled according to the stop device that maintenance information pointed air conditioning system, has promoted the maintenance efficiency to air conditioning system.

A control method of an air conditioning system provided in an embodiment of the present application is described below with reference to a specific example, and fig. 10 is a schematic overall flow chart of the control method of the air conditioning system provided in an exemplary embodiment of the present application.

As shown in fig. 10, after the air conditioning system is turned on, under the condition that the number N of times that the air conditioning system sends the warning information is equal to 0, if the air conditioning system is in the cooling mode or the dehumidification mode, it is determined whether a first preset condition is satisfied according to the operation parameters of the air conditioning system, where the first preset condition includes that the operation frequency of the compressor is greater than or equal to a first frequency threshold, the working current value of the compressor is less than or equal to a first preset current value, the operation duration of the compressor is less than or equal to a first preset duration, the difference between the temperature value of the indoor environment and the temperature value of the indoor coil is less than or equal to 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 less than or equal to a second preset difference, and if any one of the first preset condition is not satisfied, the operation parameters of the air conditioning system is obtained again after the air conditioning system is operated for 10 seconds, so as to determine whether the first cut-off device and/or the second cut-off device of the air conditioning system is in the closed state.

Similarly, if the air conditioning system is in the heating mode, it is determined whether a second preset condition is satisfied according to the operation parameters of the air conditioning system, that is, it is determined that 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 temperature 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. If the second preset condition is not met, the operation parameters of the air conditioning system are acquired again after the air conditioning system operates for 10 seconds, so that whether the second preset condition is met or not is determined.

And under the condition that 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 are/is in a closed state. As shown in fig. 1, the third preset condition includes: the operation time of the compressor is below a first preset time and the exhaust superheat of the compressor is above a first superheat threshold. If the third preset condition is not met, the operation parameters of the air conditioning system are obtained again after the air conditioning system operates for 10 seconds, and whether the third preset condition is met or not is determined.

The fourth preset condition includes: the operation time of the compressor is below a second preset time, and the exhaust superheat degree of the compressor is between a second superheat degree threshold value and a third superheat degree threshold value. 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 operates for 10 seconds, and whether the fourth preset conditions are met or not is determined.

And under the condition that the first preset condition is met or the second preset condition is met and the third preset condition or the fourth preset condition is met, determining that a first cut-off device and/or a second cut-off device of the air-conditioning system are/is in a closed state, further controlling the compressor to stop working, sending alarm information to the wire controller, recording the frequency of sending the alarm information to the wire controller, and locking the air-conditioning system and sending out overhaul information under the condition that the frequency of sending the alarm information to the wire controller is detected to be greater than the preset frequency (for example, 3 times). After the installer confirms the state of the cut-off device, the state of the air conditioning system can be recovered by electrifying and starting up again.

In fig. 10, Δ Tn is a difference between the temperature value of the indoor environment and the temperature value of the indoor coil, | Δ Tw | is an absolute value of a difference between the temperature value of the outdoor environment and the temperature value of the outdoor coil, N is a number of times of sending the warning information to the line controller, - [ Δ Tn ] is a difference between the temperature value of the indoor coil and the temperature value of the indoor environment, and DSH is an exhaust superheat degree of the compressor.

It can be seen that the foregoing describes the solution provided by the embodiments of the present application primarily from a methodological perspective. In order to implement the functions, the embodiments of the present application provide corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the controller may be divided into function modules according to the method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and another division manner may be provided in actual implementation.

As shown in fig. 11, the controller 3000 includes a processor 3001, and optionally, a memory 3002 and a communication interface 3003, which are connected to the processor 3001. The processor 3001, the memory 3002, and the communication interface 3003 are connected by a bus 3004.

The 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. The processor 3001 may also be any other means having processing functionality such as a circuit, device, or software module. The processor 3001 may also include multiple CPUs, and the processor 3001 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).

The memory 3002 may be a read-only memory (ROM) or other types of static storage devices that may store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that may store information and instructions, 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 compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, which are not limited by the embodiments of the present application. The memory 3002 may be separate or integrated with the processor 3001. The memory 3002 may contain, among other things, computer program code. The processor 3001 is configured to execute the computer program code stored in the memory 3002, so as to implement the fault location method provided by the embodiment of the present application.

Communication interface 3003 may be used to communicate with other devices or communication networks (e.g., ethernet, radio Access Network (RAN), wireless Local Area Networks (WLAN), etc.). Communication interface 3003 may be a module, circuitry, transceiver, or any device capable of enabling communication.

The bus 3004 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 3004 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.

Embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions run on a computer, the computer is enabled to execute the air conditioning system control method provided in the foregoing embodiments.

The embodiment of the present application further provides a computer program product, which can be directly loaded into the memory and contains software codes, and the computer program product can be loaded and executed by the computer to implement the air conditioning system control method provided by the above embodiment.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated in another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An air conditioning system comprising:

the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the refrigerant gas to the condenser;

one of the outdoor heat exchanger and the indoor heat exchanger is used as a condenser to work, and the other one is used as an evaporator to work;

a refrigerant circulation loop for circulating a refrigerant in a loop formed by the compressor, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger;

the first cut-off device is arranged on a first pipeline between the outdoor heat exchanger and the indoor heat exchanger and is used for controlling the communication and the cut-off of a refrigerant flowing in the first pipeline;

the second stopping device is arranged on a second pipeline between the indoor heat exchanger and the four-way valve and used for controlling the communication and the stopping of the refrigerant flowing through the second pipeline;

a controller for instructing the air conditioning system to execute a control instruction;

the third temperature sensor is used for detecting the outdoor environment temperature value;

the fifth temperature sensor is used for detecting the indoor environment temperature value;

wherein the controller is configured to:

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

the operating parameters include at least one of: the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat degree of the compressor, the working current value of the compressor, the running frequency of the compressor and the running duration of the compressor; the exhaust superheat degree of the compressor is the difference value between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

and controlling the compressor to stop working when the first cut-off device and/or the second cut-off device is determined to be in a closed state.

2. The air conditioning system of claim 1, wherein the controller, when configured to determine whether the first cut-off device and/or the second cut-off device is in the off state based on an operating parameter of the air conditioning system, is specifically configured to:

if the air conditioning system is in a refrigeration mode or a dehumidification mode, determining that the first cut-off device and/or the second cut-off device are/is in a closed state under the condition that a first preset condition is met; the first preset condition includes: the operation frequency of the compressor is above a first frequency threshold value, the working current value of the compressor is below a first preset current value, the operation time of the compressor is below a first preset time, the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference value.

3. The air conditioning system of claim 1, wherein the controller, when configured to determine whether the first cut-off device and/or the second cut-off device is in the off state based on an operating parameter of the air conditioning system, is specifically configured to:

if the air conditioning system is in a heating mode, under the condition that a second preset condition is met, if a third preset condition or a fourth preset condition is met, determining that the first stopping device and/or the second stopping device are/is in a closed state;

the second preset condition includes: the operation frequency of the compressor is above a second frequency threshold, the working current value of the compressor is below a second preset current value, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment is below a third preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a fourth preset difference value;

the third preset condition includes: the running time of the compressor is below a first preset time and the exhaust superheat degree of the compressor is above a first superheat degree threshold value;

4. The air conditioning system as claimed in any one of claims 1 to 3, further comprising:

a line controller, the line controller comprising a display;

the controller, after being configured to control the compressor to stop operating, is further configured to:

and sending alarm information to the wire controller so that a display of the wire controller displays the alarm information, wherein the alarm information is used for indicating that a cut-off device of the air conditioning system is in an abnormal state.

5. The air conditioning system of claim 4, wherein the controller is further configured to:

recording the times of sending alarm information to the line controller;

when the frequency of sending the alarm information to the wire controller reaches the preset frequency, the air conditioning system is locked, and the maintenance information is sent out and used for indicating the maintenance of the cut-off device of the air conditioning system.

6. A control method of an air conditioning system, characterized in that the method is applied to the air conditioning system of any one of the preceding claims 1 to 5, the method comprising:

when the air conditioning system is in an operating state, determining whether the first cut-off device and/or the second cut-off device are/is in a closed state according to the operating parameters of the air conditioning system; the operating parameters of the air conditioning system include at least one of the following parameters: the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil, the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil, the difference value between the temperature value of the indoor coil and the temperature value of the indoor environment, the exhaust superheat degree of the compressor, the working current value of the compressor, the running frequency of the compressor and the running duration of the compressor are obtained; the exhaust superheat degree of the compressor is the difference value between the exhaust temperature value of the compressor and the temperature value of the indoor coil or the temperature value of the outdoor coil;

7. The method of claim 6, wherein determining whether the first cut-off device and/or the second cut-off device is in the off state based on the operating parameter of the air conditioning system comprises:

if the air conditioning system is in a cooling mode or a dehumidification mode, determining that the first cutoff device and/or the second cutoff device is/are in a closed state under the condition that a first preset condition is met, wherein the first preset condition comprises: the operation frequency of the compressor is above a first frequency threshold value, the working current value of the compressor is below a first preset current value, the operation time of the compressor is below a first preset time, the difference value between the temperature value of the indoor environment and the temperature value of the indoor coil is below a first preset difference value, and the absolute value of the difference value between the temperature value of the outdoor environment and the temperature value of the outdoor coil is below a second preset difference value.

8. The method of claim 6, wherein determining whether the first cut-off device and/or the second cut-off device is in the off state based on the operating parameter of the air conditioning system comprises:

the third preset condition comprises: the running time of the compressor is below a first preset time and the exhaust superheat degree of the compressor is above a first superheat degree threshold value;

9. The method of any one of claims 6 to 8, wherein after the controlling the compressor to stop operating, the method further comprises:

and sending alarm information to a wire controller so that a display of the wire controller displays the alarm information, wherein the alarm information is used for indicating that a cut-off device of the air conditioning system is in an abnormal state.

10. The method of claim 9, further comprising:

recording the times of sending alarm information to the line controller;

and when the frequency of sending the alarm information to the wire controller reaches the preset frequency, locking the air conditioning system and sending out maintenance information, wherein the maintenance information is used for indicating the maintenance of a cut-off device of the air conditioning system.