CN115854488A

CN115854488A - Air conditioning equipment and fault detection method

Info

Publication number: CN115854488A
Application number: CN202211563443.2A
Authority: CN
Inventors: 徐磊
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-03-28

Abstract

The embodiment of the application provides air conditioning equipment and a fault detection method, relates to the technical field of air conditioning equipment, and aims to at least solve the problems that in the related technology, the hardware design cost and the manufacturing cost of the air conditioning equipment are increased by a mode of additionally arranging a sensor to detect refrigerant leakage. The air conditioning equipment comprises a controller, an outdoor unit and a plurality of indoor units, wherein the outdoor unit and the plurality of indoor units are connected with the controller; each indoor unit is provided with an indoor valve; the controller is configured to: responding to the operation instruction, and controlling a first number of indoor valves corresponding to the first number of indoor units to be opened so as to enable the first number of indoor units to operate; determining a first target temperature corresponding to a first target parameter, a first indoor temperature and a first outdoor temperature according to a first corresponding relation between the first operating parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature; and determining that the air conditioning equipment has a refrigerant leakage fault when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference value.

Description

Air conditioning equipment and fault detection method

Technical Field

The application relates to the technical field of air conditioning equipment, in particular to air conditioning equipment and a fault detection method.

Background

Air conditioning equipment has been widely used, and in the use process of the air conditioning equipment, the problems of looseness of a valve interface of a leakage-proof pipeline or aging of a refrigerant pipeline and the like exist, so that the refrigerant leakage is caused, and the risk is brought.

In the related art, a sensor is additionally arranged in the air conditioning equipment to detect the refrigerant, when a certain amount of refrigerant is detected, the refrigerant leakage condition is determined, and prompt information is sent to prompt a user to inform maintenance personnel to maintain. However, the above method of detecting the leaked refrigerant by adding the sensor additionally increases hardware devices of the air conditioning equipment, and increases manufacturing cost of the air conditioning equipment. In addition, the mode has high requirements on the position of the sensor, so that the hardware design difficulty of the air conditioning equipment is greatly increased.

Disclosure of Invention

The embodiment of the application provides air conditioning equipment and a fault detection method, and aims to at least solve the problems that in the related art, hardware equipment of the air conditioning equipment is additionally arranged in a mode of detecting refrigerant leakage by additionally arranging a sensor, so that the hardware design cost and the manufacturing cost of the air conditioning equipment are increased.

In a first aspect, an air conditioning apparatus is provided, which includes a controller, an outdoor unit connected to the controller, and a plurality of indoor units; the indoor units are respectively communicated with the outdoor unit through pipelines, and each indoor unit is provided with an indoor valve; the indoor valve is used for controlling the quantity of the refrigerant entering the indoor unit from the refrigerant in the pipeline; the controller is configured to: responding to the operation instruction, and controlling a first number of indoor valves corresponding to the first number of indoor units to be opened so as to enable the first number of indoor units to operate; the operation instruction instructs the air conditioning equipment to operate at a first target parameter; the first target parameter comprises a first preset duration and a first quantity; the first preset time length indicates the running time length of the air conditioning equipment, and the first quantity is the number of indoor units to be run in the plurality of indoor units; determining a first target temperature corresponding to a first target parameter, a first indoor temperature and a first outdoor temperature according to a first corresponding relation between the first operating parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature; the first indoor temperature is the initial temperature of the indoor environment when the air conditioning equipment is not operated, and the first outdoor temperature is the outdoor environment temperature of the air conditioning equipment; when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is larger than or equal to a first preset difference value, determining that the air-conditioning equipment has a refrigerant leakage fault; the second indoor temperature is an indoor temperature that the indoor environment reaches when the air conditioning apparatus operates for the first preset time period.

The first operation parameter includes the number of the indoor units operated in the plurality of indoor units, that is, the first number.

The first indoor temperature is an indoor temperature at which the air conditioning apparatus is not operating. Optionally, the first indoor temperature is collected when the air conditioning apparatus is ready to enter an operating state or starts to enter an operation.

As an obtaining manner of obtaining the first indoor temperature, when each indoor unit is installed in the same indoor environment or when the difference between the indoor environment temperatures corresponding to each indoor unit is not large, in order to obtain the rapidity of the first indoor temperature, the first indoor temperature may be an indoor environment temperature corresponding to any one indoor unit in any first number of indoor units.

As another obtaining manner for obtaining the first indoor temperature, in order to ensure the accuracy of obtaining the first indoor environment, the first indoor temperature may also be an average value of indoor environment temperatures corresponding to each indoor unit in the first number of indoor units, so as to avoid that the difference of the indoor environment temperatures of the indoor units is too large, thereby causing the problem of low accuracy of the first indoor temperature.

Before or after the air-conditioning equipment operates, the outdoor ambient temperature has little difference, that is, the operation of the air-conditioning equipment has little influence on the outdoor ambient temperature, so the first outdoor temperature may be the outdoor temperature in a period of time before the air-conditioning equipment operates or the outdoor temperature in a period of time after the air-conditioning equipment operates.

The first preset time period can be any time period of the air conditioning equipment after the air conditioning equipment starts to operate; or the running time of the air conditioning equipment when the air conditioning equipment enters the stable running state.

The above-described method for determining a refrigerant leakage failure in the air conditioning apparatus is to execute the steps when the air conditioning apparatus is in the failure detection mode. That is, when the air conditioner turns on the failure detection mode, the controller of the air conditioner performs the above failure detection.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects: the air conditioning equipment is provided with a first corresponding relation among a first operation parameter, an initial indoor temperature, an outdoor temperature and a target indoor temperature. Based on the first corresponding relationship, the first target temperature can be determined by obtaining the operating parameter (i.e., the first target parameter) of the current operation of the air-conditioning equipment, the indoor initial temperature (i.e., the first indoor temperature) when the air-conditioning equipment is not operated, and the current outdoor temperature (i.e., the first outdoor temperature). And after the air conditioning equipment operates for the first preset time, acquiring the second indoor temperature of the air conditioning equipment operating for the first preset time. And determining whether the second indoor temperature is within a reasonable temperature range or not by comparing the second indoor temperature with the first target temperature, and if not, determining that the air conditioning equipment has refrigerant leakage fault. Therefore, the air conditioning equipment can determine that the air conditioning equipment has a refrigerant leakage fault by acquiring the first operating parameter, the first indoor temperature, the second indoor temperature and the first outdoor temperature of the air conditioning equipment based on the first corresponding relation, and the hardware cost of the air conditioning equipment is reduced without additionally using a refrigerant leakage detection device, so that the use cost of the user air conditioning equipment is reduced.

In addition, when the refrigerant of the air conditioning equipment leaks, the refrigerating or heating capacity of the air conditioning equipment is obviously reduced, and under the condition that the indoor environment and the outdoor environment are fixed and the air conditioning equipment runs by using the same operation parameters, the adjustment temperature of the indoor environment is adjusted by the failed air conditioning equipment, and the adjustment temperature is greatly different from that of the air conditioning equipment without failure. Therefore, based on the comparison result of the current temperature and the first target temperature, the refrigerant leakage condition of the air conditioning equipment can be reflected in time, so that the air conditioning equipment can determine the refrigerant fault in time, the refrigerant equipment can be maintained in time, and the problem that the maintenance cost of the air conditioning equipment is high due to the fact that the air conditioning equipment runs in a fault state for a long time due to the fact that the fault detection of the air conditioning equipment is not in time is solved.

In some embodiments, the controller is further configured to: and when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference value, determining that no refrigerant leakage fault occurs in the air conditioning equipment.

In this embodiment, after the air conditioning equipment is operated for a first preset time period, the second indoor temperature is compared with the first target temperature, and after the comparison, the following condition is satisfied: and when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference value, determining that the second indoor temperature is within a reasonable temperature range, and indicating that the air-conditioning equipment does not have refrigerant leakage fault and can normally operate. Therefore, based on the embodiment, the condition that the refrigerant leakage fault does not occur to the air conditioning equipment is determined, so that the normal operation of the air conditioning equipment is ensured under the condition that the refrigerant leakage fault does not occur to the air conditioning equipment, and the reasonability of the control process of the air conditioning equipment is ensured.

In some embodiments, the controller is further configured to: under the condition that the refrigerant leakage fault of the air conditioning equipment is determined, closing the first number of indoor valves; sequentially opening any one of the first number of indoor valves to sequentially control each target indoor unit to operate according to a second target parameter; the second target parameter comprises a second preset time length; the opened indoor valve is a target indoor valve, and an indoor unit corresponding to the target indoor valve is a target indoor unit; sequentially determining refrigerant leakage faults of the target indoor unit until the number of independently opening target indoor valves is a first number; the determining of the refrigerant leakage fault of the target indoor unit includes: determining a second target temperature corresponding to the second target parameter and the third indoor temperature according to a second corresponding relation between the second operating parameter, the initial indoor temperature and the target indoor temperature; the third indoor temperature is the initial temperature of the indoor environment when the target indoor unit operates; when the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is greater than or equal to a second preset difference value, determining that the target indoor unit breaks down; and when the fourth indoor temperature is the second preset time length of the target indoor unit operation, the indoor environment of the target indoor unit reaches the indoor temperature.

In the above embodiment, after determining that the air conditioning apparatus has the refrigerant leakage fault, it is determined whether the operating indoor unit has the refrigerant leakage fault. Specifically, the indoor valves of all the indoor units operating with the first target parameter are closed, and then the refrigerant leakage fault of each indoor unit in the first number of operating indoor units is determined, so as to determine the indoor unit with the refrigerant leakage fault.

In this embodiment, when it is determined that the air conditioning apparatus is in a refrigerant leakage fault, all of the indoor valves corresponding to the first number of operating indoor units are closed, so that no refrigerant enters the first number of indoor units. And then, the refrigerant leakage faults of each target indoor unit are determined successively by a mode that only one target indoor valve is opened at a time to enable one target indoor unit to operate, so that the number of target indoor units with refrigerant leakage faults is determined.

In some embodiments, the controller is further configured to: and when the target indoor unit is determined to have a fault, sending first prompt information to prompt the target indoor unit to have a refrigerant leakage fault.

As a prompting mode, the first prompting message includes identification information of a target indoor unit in which a failure occurs.

Based on the embodiment, the user can know which indoor unit or indoor units have the refrigerant leakage fault according to the first prompt message, so that the user or maintenance personnel can maintain the target indoor unit with the fault in a targeted manner when the user or maintenance personnel maintain the air conditioning equipment conveniently.

In some embodiments, the controller is further configured to: and when the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is smaller than a second preset difference value, determining that the target indoor unit does not have refrigerant leakage fault.

Based on the embodiment, the condition that no refrigerant leakage fault occurs in each target indoor unit is determined so as to distinguish the target indoor units which have refrigerant leakage faults and do not have refrigerant leakage faults in the first number of indoor units.

In some embodiments, the controller is further configured to: and when no refrigerant leakage fault occurs in the first number of target indoor units, determining that the refrigerant leakage fault occurs in the outdoor unit.

Based on this embodiment, if the absolute value of the temperature difference between the third indoor temperature and the second target temperature corresponding to each target indoor unit in the first number of target indoor units is smaller than the second preset difference value, it is determined that no refrigerant leakage fault occurs in each target indoor unit, and thus, it is determined that the refrigerant leakage fault occurs in the outdoor unit.

In some embodiments, the controller is further configured to: and when the indoor unit is determined to have the refrigerant leakage fault, sending second prompt information to prompt the outdoor unit to have the refrigerant leakage fault.

Based on the embodiment, the refrigerant leakage fault of the specific outdoor unit can be known according to the second prompt message, so that a user or a maintenance worker can conveniently maintain the failed outdoor unit in a targeted manner when the air conditioning equipment is maintained.

In some embodiments, the first operating parameter or the second operating parameter further comprises at least one or more of: air output, air conditioner rotation speed, air speed and working frequency of the compressor.

In a second aspect, there is provided a fault detection method of an air conditioning apparatus, the fault detection method including: responding to the operation instruction, and controlling a first number of indoor valves corresponding to the first number of indoor units to be opened so as to enable the first number of indoor units to operate; the operation instruction instructs the air conditioning equipment to operate at a first target parameter; the first target parameter comprises a first preset time length and a first quantity; the first preset time length indicates the running time length of the air conditioning equipment, and the first quantity is the number of indoor units to be run in the plurality of indoor units; determining a first target parameter, a first indoor temperature and a first target temperature corresponding to the first outdoor temperature according to a first corresponding relation between the first operating parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature; the first indoor temperature is the initial temperature of the indoor environment when the air conditioning equipment is not operated, and the first outdoor temperature is the outdoor environment temperature of the air conditioning equipment; when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference value, determining that the air conditioning equipment has a refrigerant leakage fault; the second indoor temperature is an indoor temperature that the indoor environment reaches when the air conditioning apparatus operates for the first preset time period.

In some embodiments, the fault detection method further comprises: and when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference value, determining that no refrigerant leakage fault occurs in the air conditioning equipment.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored, and when the instructions are executed on any one of the apparatuses, the instructions cause the apparatus to perform any one of the fault detection methods described above.

In a fourth aspect, an embodiment of the present application provides a chip, including: a processor and a memory; the memory is used for storing computer execution instructions, the processor is connected with the memory, and when the chip runs, the processor executes the computer execution instructions stored by the memory so as to enable the chip to execute any fault detection method.

In a fifth aspect, embodiments of the present application provide a computer program product comprising instructions that, when run on any one of the above apparatuses, cause an apparatus to perform any one of the above fault detection methods.

In the embodiments of the present application, the names of the components of the above-mentioned apparatus do not limit the apparatus itself, and in practical implementations, these components may appear by other names. Insofar as the functions of the respective components are similar to those of the embodiments of the present application, they are within the scope of the claims of the present application and their equivalents.

In addition, the technical effects brought by any one of the design methods of the second aspect to the fifth aspect can be referred to the technical effects brought by the different design methods of the first aspect, and are not described herein again.

Drawings

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

Fig. 1 is a schematic diagram of a framework of an air conditioning apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another air conditioning apparatus according to an embodiment of the present disclosure;

fig. 3 is a circuit architecture diagram of an air conditioning apparatus according to an embodiment of the present application;

fig. 4 is a flowchart of a fault detection method provided in an embodiment of the present application;

fig. 5 is a schematic diagram illustrating a corresponding relationship between an ambient temperature, an operating parameter, and a target temperature according to an embodiment of the present disclosure;

fig. 6 is a flowchart of another fault detection method provided in the embodiment of the present application;

fig. 7 is a flowchart of another fault detection method provided in an embodiment of the present application;

fig. 8 is a schematic diagram of a detection process of a fault detection apparatus according to an embodiment of the present application;

fig. 9 is a flowchart of another fault detection method provided in the embodiment of the present application;

fig. 10 is a schematic hardware structure diagram of a controller according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

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. In this way, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. 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 "connected" are used in this application to have a meaning of conducting. The specific meaning is to be understood in conjunction with the context.

In the embodiments of the present application, words such as "exemplary" or "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.

In view of this, the present embodiments provide an air conditioning apparatus, in which a first corresponding relationship between a first operating parameter, an initial indoor temperature, an outdoor temperature, and a target indoor temperature is set. Based on the first corresponding relationship, the first target temperature can be determined by obtaining the operating parameter (i.e., the first target parameter) of the current operation of the air-conditioning equipment, the indoor initial temperature (i.e., the first indoor temperature) when the air-conditioning equipment is not operated, and the current outdoor temperature (i.e., the first outdoor temperature). And after the air conditioning equipment runs for the first preset time, acquiring the second indoor temperature of the air conditioning equipment when the air conditioning equipment runs for the first preset time. And determining whether the second indoor temperature is within a reasonable temperature range or not by comparing the second indoor temperature with the first target temperature, and if not, determining that the air conditioning equipment has refrigerant leakage fault.

Therefore, the air conditioning equipment can determine that the air conditioning equipment has a refrigerant leakage fault by acquiring the first operating parameter, the first indoor temperature, the second indoor temperature and the first outdoor temperature of the air conditioning equipment based on the first corresponding relation, and the hardware cost of the air conditioning equipment is reduced without additionally using a refrigerant leakage detection device, so that the use cost of the user air conditioning equipment is reduced.

In addition, when the refrigerant of the air conditioning equipment leaks, the refrigerating or heating capacity of the air conditioning equipment is obviously reduced, and under the condition that the indoor environment and the outdoor environment are fixed, when the air conditioning equipment runs by using the same operation parameters, the air conditioning equipment with a fault adjusts the adjusting temperature of the indoor environment, and the adjusting temperature is greatly different from the adjusting temperature of the air conditioning equipment without the fault. Therefore, based on the comparison result of the current temperature and the first target temperature, the refrigerant leakage condition of the air conditioning equipment can be reflected in time, so that the air conditioning equipment can determine the refrigerant fault in time, the refrigerant equipment can be maintained in time, and the problem that the maintenance cost of the air conditioning equipment is high due to the fact that the air conditioning equipment runs in a fault state for a long time due to the fact that the fault detection of the air conditioning equipment is not in time is solved.

In the embodiment of the present application, the air conditioners may be a multi-split air conditioner, a single air conditioner, and the like, the multi-split air conditioner includes an outdoor unit and a plurality of indoor units, and the single air conditioner includes an outdoor unit corresponding to one indoor unit.

To further describe the solution of the present application, a schematic structural diagram of an air conditioning apparatus provided in the embodiments of the present application is described below by taking a multi-split air conditioning apparatus as an example.

Referring to fig. 1 to3, the air conditioner 100 may include: an outdoor unit 200, a plurality of indoor units 300, and a controller 103. The controller 103 is connected to the indoor unit 300 and the outdoor unit 200; the indoor unit 300 and the outdoor unit 200 are communicated with each other through a pipe. Fig. 2 simply shows the communication structure between the outdoor unit and one indoor unit, and the communication structures between the other indoor units and the outdoor unit are the same, and are not described in detail here.

The outdoor unit 200 includes: an outdoor heat exchanger 201, a compressor 202, a four-way valve 203, a bypass shutoff valve 204, an outdoor solenoid valve 205, and an outdoor throttling device 206.

In some embodiments, each indoor unit is provided with a temperature detection device 101 (not shown in fig. 1 and 2) for collecting a first indoor temperature, a second indoor temperature, and a third indoor temperature.

In some embodiments, the outdoor unit further includes an outdoor liquid pipe temperature sensor 207 for detecting an outdoor ambient temperature, i.e., a first outdoor temperature.

In some embodiments, the compressor 202, the four-way valve 203, the outdoor heat exchanger 201 in the outdoor unit 200, and the indoor expansion valve, the indoor heat exchanger, and the circulation branch solenoid valve in each indoor unit are connected in sequence through pipes to form a refrigerant circulation loop.

In some embodiments, outdoor heat exchanger 201 is coupled to compressor 202 at one end via four-way valve 203 and coupled to an indoor heat exchanger at the other end. The outdoor heat exchanger 201 exchanges heat between the refrigerant flowing through the heat transfer tubes of the outdoor heat exchanger 201 and the outdoor air.

In some embodiments, the compressor 202 is disposed between the indoor heat exchanger 301 and the outdoor heat exchanger 201 for providing power for the refrigerant cycle. In the cooling mode, for example, the compressor 202 sends the compressed refrigerant to the outdoor heat exchanger 201 via the four-way valve 203. Alternatively, the compressor 202 may be a variable capacity inverter compressor 202 based on rotational speed control of an inverter.

In some embodiments, four ports of the four-way valve 203 are respectively connected to the discharge port of the compressor 202, the outdoor heat exchanger 201, the suction port of the compressor 202, and the indoor heat exchanger of each indoor unit. The four-way valve 203 is used for realizing the interconversion between the cooling mode and the heating mode by changing the flow direction of the refrigerant in the system pipeline.

In some embodiments, a bypass cut-off valve 204 is disposed between the four-way valve 203 and the indoor heat exchanger of each indoor unit, and the bypass cut-off valve 204 is normally opened after the installation of the air conditioner is completed.

In some embodiments, the outdoor solenoid valve 205 is disposed on the refrigerant bypass branch between the four-way valve 203 and each indoor heat exchanger, and is used for controlling the connection and disconnection of the refrigerant bypass branch.

In some embodiments, the outdoor throttling device 206 is disposed between the outdoor solenoid valve 205 and the compressor 202 for reducing the pressure of the high-temperature and high-pressure refrigerant delivered from the compressor discharge port. Illustratively, the outdoor throttle 206 may include an electronic expansion valve and/or a capillary tube.

Alternatively, the outdoor throttle device 206 may be disposed between the outdoor electromagnetic valve 205 and the bypass cut-off valve 204.

Alternatively, the outdoor throttle device 206 may be provided between the bypass cut-off valve 204 and each indoor unit. This is not limited by the present application.

In some embodiments, the outdoor unit 200 further includes an outdoor fan (not shown) that generates an airflow of the outdoor air passing through the outdoor heat exchanger 201 to promote heat exchange between the refrigerant flowing through the heat transfer pipes of the outdoor heat exchanger 201 and the outdoor air.

In some embodiments, the outdoor unit 200 further includes an outdoor fan motor (not shown) connected to the outdoor fan for driving or changing the rotation speed of the outdoor fan.

In some embodiments, the outdoor unit 200 further includes a high pressure switch (not shown), which is electrically connected to the controller 103 and is configured to monitor the pressure of the air conditioning pipeline, and send an abnormal message to the controller 103 when the pipeline pressure of the air conditioning equipment 100 is abnormal, so that the controller 103 controls the system to stop and ensure the normal operation of the air conditioning equipment 100.

Further, the indoor unit 300 includes: an indoor heat exchanger 301, an indoor expansion valve 302, a bypass branch solenoid valve 303, and a circulation branch solenoid valve 304.

In some embodiments, the indoor unit 300 further includes an indoor liquid pipe temperature sensor 305 and an indoor fan 306.

In some embodiments, the discharge port of the compressor 202 in the outdoor unit 200, the outdoor throttling device 206, the outdoor solenoid valve 205, the bypass stop valve 204, and the bypass solenoid valve and the indoor heat exchanger in the indoor unit are connected in sequence through pipes to form a refrigerant bypass branch.

In some embodiments, the indoor heat exchanger 301 is configured to exchange heat between the refrigerant flowing through the heat transfer tubes of the indoor heat exchanger 301 and the indoor air.

In some embodiments, the indoor expansion valve 302 is disposed between the indoor heat exchanger 301 and the outdoor heat exchanger 201, and has a function of expanding and decompressing the refrigerant flowing through the electronic expansion valve, and may be used to adjust the supply amount of the refrigerant in the pipeline.

Alternatively, the air conditioning apparatus 100 may be provided with a plurality of electronic expansion valves. If the opening degree of the electronic expansion valve is decreased, the flow path resistance of the refrigerant passing through the electronic expansion valve is increased. 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 through the indoor heat exchanger 301 or the outdoor heat exchanger 201 changes when the opening degree of the electronic expansion valve changes.

It should be noted that the number of the electronic expansion valves shown in fig. 1 is merely an example, and the present application is not limited thereto.

In some embodiments, the bypass solenoid valve 303 is disposed between the indoor heat exchanger 301 and the four-way valve 203, and is used for controlling the connection and disconnection of the refrigerant bypass of a single indoor unit. It should be understood that the bypass branch solenoid valve 303 may also be disposed between the bypass blocking valve 204 and the four-way valve 203, or between the indoor heat exchanger 301 and the four-way valve 203, as long as it is disposed on the main branch of the bypass refrigerant branch of each indoor unit, which is not limited in this application.

In some embodiments, the circulation branch solenoid valve 304 is disposed between the indoor heat exchanger 301 and the four-way valve 203, and is used for controlling the connection and disconnection of the refrigerant circulation branches of the single indoor unit.

In some embodiments, an indoor liquid pipe temperature sensor 301 is disposed at a liquid pipe of the indoor heat exchanger 301 for detecting a liquid pipe temperature of the indoor heat exchanger 301.

In some embodiments, the indoor fan 306 generates an airflow of the indoor air passing through the indoor heat exchanger 301 to promote heat exchange between the refrigerant flowing in the heat transfer pipe of the indoor heat exchanger 301 and the indoor air.

In some embodiments, the indoor unit 300 further includes an indoor fan motor (not shown) connected to the indoor fan for driving or changing the rotation speed of the indoor fan.

In some embodiments, the indoor unit 300 further includes a plurality of capillary tubes (not shown) for reducing the pressure of the refrigerant in the pipes, and for depressurizing the high-pressure refrigerant delivered from the condenser and delivering the depressurized refrigerant to the evaporator.

In some embodiments, the indoor unit 300 further includes a humidity sensor (not shown) for detecting the relative humidity of the indoor air.

In some embodiments, the indoor unit 300 further includes a dew point meter (not shown) for detecting an ambient dew point temperature near the indoor heat exchanger.

In some embodiments, the indoor unit 300 further includes a display 102. There is an electrical connection between the display 102 and the controller 103.

Optionally, the display 102 is used to display a control panel of the air conditioner 100, for example, the display 102 may be used to display the indoor temperature or the current operation mode.

Alternatively, the display 102 is connected to the controller 103, and the user can perform operations on the control panel through the display 102 to set a program.

Alternatively, the display 102 may transmit a user instruction to the control to implement a human-computer interaction function according to a gesture operation of the user, such as pressing a key or the like.

Alternatively, the display 102 may be a liquid crystal display, an organic light-emitting diode (OLED) display. The particular type, size, resolution, etc. of the display 102 are not limiting, and those skilled in the art will appreciate that the display 102 may be modified in performance and configuration as desired.

In some embodiments, the controller 103 refers to a device that can generate an operation control signal according to the command operation code and the timing signal, and instruct the air conditioner 100 to execute the control command. Illustratively, the controller 103 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 controller 103 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 some embodiments, the controller 103 can respond to the operation instruction by first controlling the temperature detection device to detect the first indoor temperature and controlling the first number of indoor valves corresponding to the first number of indoor units to open, so as to operate the first number of indoor units. And when the air conditioning equipment runs for a first preset time length, controlling the outdoor temperature detection device to detect the second indoor temperature. Meanwhile, according to the first corresponding relation among the first operation parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature, a first target temperature corresponding to the first target parameter, the first indoor temperature and the first outdoor temperature is determined. And when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is judged to be greater than or equal to a first preset difference value, determining that the air conditioning equipment has a refrigerant leakage fault.

Although not shown in fig. 1, the air conditioner 100 may further include a power supply device (such as a battery and a power management chip) for supplying power to each component, and the battery may be logically connected to the controller through the power management chip, so that the power consumption management and other functions of the air conditioner 100 are implemented through the power supply device.

Fig. 3 schematically shows a circuit system architecture diagram of the air conditioner 100.

As shown in fig. 3, the air conditioner 100 may further include: the system comprises an early warning device 104, a communication device 105, a man-machine interaction device 106 and a power supply 107.

The indoor heat exchanger 301, the outdoor heat exchanger 201, the temperature detection device 101, the four-way valve 203, the early warning device 104, the communication device 105, the human-computer interaction device 106 and the power supply 107 are all connected with the controller 103.

In some embodiments, the communication device 105 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communication device may include at least one of a Wi-Fi chip, a bluetooth communication protocol chip, a wired ethernet communication protocol chip, or other network communication protocol chip or near field communication protocol chip, and an infrared receiver.

In some embodiments, the air conditioner 100 may transmit control signals and data signals with a terminal device (e.g., a mobile phone, a tablet computer, a wearable mobile device, etc.) used by a user, other household devices (e.g., an air conditioner, a monitoring device, etc.), and a server through the communication device 105. For example, a user may send an instruction indicating to turn on the operation mode (e.g., turn on the heating mode, the cooling mode, the dehumidifying mode, or the sterilizing operation mode) through a mobile phone, the air conditioner 100 may receive the instruction through the communication device 105, and the controller 103 of the air conditioner 100 may turn on the corresponding operation mode in response to the instruction indicating to turn on the operation mode.

In some embodiments, the human-computer interaction device 106 is used for realizing the interaction between the user and the air conditioner 100. The human-computer interaction device 106 may include one or more of a physical key, a touch display panel, or a voice recognition device. For example, the user may start the air conditioner 100 to operate through the human-computer interaction device 106, or may set an operation program for the air conditioner 100 to operate through the human-computer interaction device 106.

In some embodiments, the power supply 107, under the control of the controller 103, provides power supply support for the air conditioner 100 from the power input from the external power source.

Based on the air conditioning equipment, as shown in fig. 4, an embodiment of the present application provides a fault detection method, which includes the following steps:

step S401, responding to the operation instruction, controlling a first number of indoor valves corresponding to a first number of indoor units to be opened so as to enable the first number of indoor units to operate.

The operation instruction instructs the air conditioning equipment to operate at a first target parameter; the first target parameter includes a first preset duration and a first quantity. The first preset time length indicates the running time length of the air conditioning equipment, and the first number is the number of indoor units to be run in the plurality of indoor units. It is understood that the first operating parameter comprises the number of indoor units of the plurality of indoor units that are operating, i.e. the first number.

In the step, the number of indoor units to be operated in the plurality of indoor units and the number of the indoor units to be operated are determined according to the number of the indoor units to be operated, which is included in the first target parameter.

In some embodiments, the first target parameters further include at least one or more of the following operational parameters: the air outlet quantity is preset, the air speed is preset, the working frequency of a compressor is preset, and the like.

Step S402, determining a first target temperature corresponding to a first target parameter, a first indoor temperature and a first outdoor temperature according to a first corresponding relation among the first operation parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature.

This step may be understood as determining the first target parameter, the first indoor temperature, and the target temperature corresponding to the first outdoor temperature as the first target temperature.

The first operating parameter includes at least one or more of the following in addition to the preset duration: air output, air conditioner rotation speed, air speed and working frequency of the compressor.

The first indoor temperature is the initial temperature of the indoor environment when the air conditioning equipment is not operated, and the first outdoor temperature is the outdoor environment temperature where the air conditioning equipment is located.

The first target temperature represents a target temperature which can be reached when the indoor environment operates with the first target operation parameter under the condition that the air conditioning equipment does not have refrigerant leakage fault.

For example, the application location where each indoor unit is installed in the same indoor environment may be a large conference room where a plurality of indoor units are installed.

In another example, the indoor environment temperature of each indoor unit may be set to a plurality of spaces each including a plurality of bedrooms, a living room, a kitchen, and a toilet, and the plurality of spaces may correspond to the places where the indoor units are installed.

For the scene of obtaining the first outdoor temperature, before or after the air-conditioning equipment operates, the outdoor ambient temperature is not greatly different, that is, the operation of the air-conditioning equipment has little influence on the outdoor ambient temperature, so the first outdoor temperature may be the outdoor temperature in a period of time before the air-conditioning equipment operates, or the outdoor temperature in a period of time after the air-conditioning equipment operates. Therefore, the time for acquiring the first outdoor temperature by the air conditioning equipment is not particularly limited, and the first outdoor temperature can reflect the outdoor environment temperature of the air conditioning equipment during operation.

Illustratively, the controller obtains a first indoor temperature and a first outdoor temperature of the indoor environment in response to the operating instructions.

As shown in fig. 5, a first corresponding relation expression manner is described as follows, taking the first operation parameter as an example including the preset time period and the air conditioner rotation speed.

Different outdoor temperatures (such as To1, to2 and To3 …), different initial indoor temperatures (such as STi1, STi2 and STi3 …), different target indoor temperatures (such as ETi, ETi and ETi and …) are different under different preset time lengths (such as delta t1, delta t2 and delta t3.) and different air conditioner rotating speeds (such as N1, N2 and N3 …).

Specifically, when the first outdoor temperature is To1, the first indoor temperature is STi1, the first preset time duration is Δ t1, and the air conditioner rotation speed is N1, the corresponding target indoor temperature is ETi. When the first outdoor temperature is To2, the first indoor temperature is STi2, the first preset time duration is delta t2, and the air conditioner rotating speed is N2, the corresponding target indoor temperature is ETi. When the first outdoor temperature is To3, the first indoor temperature is STi3, the first preset time length is delta t3 and the air conditioner rotating speed is N3, the corresponding target indoor temperature is ETi.

Fig. 5 illustrates only three sets of data as an example, and the present application does not specifically limit the number of specific sets of data.

The first correspondence relationship may be expressed in the form of a formula pattern, and the expression form of the first correspondence relationship is not particularly limited in the present application.

And S403, determining that the air conditioning equipment has a refrigerant leakage fault when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference value.

The second indoor temperature is an indoor temperature that the indoor environment reaches when the air conditioning apparatus operates for the first preset time period.

As a way of acquiring the second indoor temperature: and when the air conditioning equipment runs for a first preset time length, acquiring a second indoor temperature of the current indoor environment.

The step of executing the acquisition mode may be executed between step S401 and step S402, or may be executed between step S402 and step S403. The present application is not particularly limited thereto.

The method of determining the refrigerant leakage failure in steps S402 and S403 is a control step executed when the air conditioner is in the failure detection mode. That is, when the air conditioner turns on the failure detection mode, the controller of the air conditioner performs the above failure detection steps S402 and S403.

The technical solution shown in fig. 4 brings at least the following beneficial effects: this air conditioning equipment provides a fault detection mode, can be based on first corresponding relation under this mode, through the first operating parameter, first indoor temperature, the second indoor temperature and the first outdoor temperature who acquire air conditioning equipment, can determine that air conditioning equipment takes place refrigerant leakage fault, need not additionally use refrigerant leakage detection device, has reduced air conditioning equipment's hardware cost to reduce user air conditioning equipment's use cost.

In some embodiments, as shown in fig. 6 in conjunction with fig. 4, after the step S402 is executed, the following step may be further executed to determine that the refrigerant leakage does not occur in the air conditioner.

Step S601, when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference, it is determined that the air conditioning equipment has no refrigerant leakage fault.

In this embodiment, after the air conditioning apparatus is operated for a first preset time period, the second indoor temperature is compared with the first target temperature, and after the comparison, the following condition is satisfied: and when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference value, determining that the second indoor temperature is within a reasonable temperature range, and indicating that the air-conditioning equipment does not have refrigerant leakage fault and can normally operate.

Therefore, based on the embodiment, the condition that the refrigerant leakage fault does not occur to the air conditioning equipment is determined, so that the normal operation of the air conditioning equipment is ensured under the condition that the refrigerant leakage fault does not occur to the air conditioning equipment, and the reasonability of the control process of the air conditioning equipment is ensured.

In some embodiments, as shown in fig. 7 in conjunction with fig. 4, after step S403 is executed, the following step may be executed to determine that refrigerant leakage occurs in each indoor unit of the air conditioning equipment.

In step S404, when it is determined that the air conditioning apparatus has a refrigerant leakage failure, the first number of indoor valves are closed.

And S405, sequentially opening only any one of the first number of indoor valves to sequentially control each target indoor unit to operate according to a second target parameter.

The second target parameter includes a second preset duration. And meanwhile, determining the opened indoor valve as a target indoor valve, and determining the indoor unit corresponding to the target indoor valve as a target indoor unit.

Step S406, the refrigerant leakage faults of the target indoor unit are sequentially determined until the number of the target indoor valves which are independently opened is the first number.

The failure determination method for each target indoor unit in step S406 is the same. Specifically, the determining the refrigerant leakage fault of the target indoor unit includes: the controller determines a second target temperature corresponding to the second target parameter and the third indoor temperature according to a second corresponding relation between the second operating parameter, the initial indoor temperature and the target indoor temperature. And the third indoor temperature is the initial temperature of the indoor environment when the target indoor unit operates. And comparing the fourth indoor temperature with the second target temperature, and determining that the target indoor unit has a fault if the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is greater than or equal to a second preset difference value. And when the fourth indoor temperature is the second preset time length of the target indoor unit, the indoor environment of the target indoor unit reaches the indoor temperature.

The second operating parameter includes at least one or more of: air conditioner rotation speed, air output, wind speed and working frequency of the compressor.

It should be noted that the second corresponding relationship may be the same as the first corresponding relationship expression parameter, that is, the second corresponding relationship, and the corresponding relationship between the second operation parameter, the initial indoor temperature, the outdoor temperature, and the target indoor temperature. In the second corresponding relationship scenario, a second outdoor temperature of the current outdoor environment may be obtained when the target indoor unit operates.

Whereas the outdoor ambient temperature is not very different for a short time and is usually constant over time. Therefore, the first outdoor temperature and the second outdoor temperature are not different greatly. A second corresponding relationship at the first outdoor temperature is correspondingly set based on the first corresponding relationship. Therefore, the second corresponding relationship may also be a corresponding relationship between the second operating parameter, the initial indoor temperature, and the target indoor temperature.

In addition, the representation manner of the second corresponding relationship is the same as that of the first corresponding relationship, and therefore, the description thereof is omitted.

In the above embodiment, after determining that the air conditioning equipment has the refrigerant leakage failure, it is determined whether the operating indoor unit has the refrigerant leakage failure. Specifically, the indoor valves of all the indoor units operating with the first target parameter are closed, and then the refrigerant leakage fault of each indoor unit in the first number of operating indoor units is determined, so that the indoor unit with the refrigerant leakage fault is determined.

For example, the process of determining that the refrigerant leakage failure occurs in the indoor units will be described below, taking the first number of 3 indoor units as an example.

The indoor valves of the 3 indoor units that are in operation are closed first. And then opening a first indoor valve of a first indoor unit in the 3 indoor units, and simultaneously keeping two indoor valves (a second indoor valve and a third indoor valve) corresponding to the other two indoor units (a second indoor unit and a third indoor unit) closed so as to control the first indoor unit to operate at a second target parameter. And in the process that the first indoor unit operates with the second target parameter, determining the condition of the first indoor unit with refrigerant leakage fault by using the collected third indoor temperature and fourth indoor temperature of the first indoor unit.

Furthermore, after the refrigerant leakage fault condition of the first indoor unit is determined, a first indoor valve of the first indoor unit is closed, and meanwhile, a second indoor valve of the second indoor unit is opened so as to control the second indoor unit to operate at a second target parameter. And determining the refrigerant leakage fault condition of the second indoor unit in the same manner as the manner of determining the refrigerant leakage fault of the first indoor unit.

Further, after the refrigerant leakage fault condition of the second indoor unit is determined, a second indoor valve of the second indoor unit is closed, and meanwhile, a third indoor valve of the third indoor unit is opened to control the third indoor unit to operate according to the second target parameter. And determining the refrigerant leakage fault condition of the third indoor unit in the same manner as the manner of determining the refrigerant leakage fault of the first indoor unit.

The determination results of the refrigerant leakage faults of the first indoor unit to the third indoor unit are of the following types: (1) And any one indoor unit from the first indoor unit to the third indoor unit has a refrigerant leakage fault. (2) Any two indoor units from the first indoor unit to the third indoor unit have refrigerant leakage faults. (3) And refrigerant leakage faults occur in all three indoor units from the first indoor unit to the third indoor unit. (4) And no refrigerant leakage fault occurs in any of the first indoor unit to the third indoor unit.

Through the embodiment, under the condition that the air conditioning equipment is determined to be in the refrigerant leakage fault, all the indoor valves corresponding to the first number of running indoor units are closed, so that no refrigerant enters the first number of indoor units. And then, the refrigerant leakage faults of each target indoor unit are determined successively by a mode that only one target indoor valve is opened at a time to enable one target indoor unit to operate, so that the number of target indoor units with refrigerant leakage faults is determined.

In some embodiments, after determining that the target indoor unit has a refrigerant leakage fault, the controller is further configured to perform the following steps: and when the target indoor unit is determined to have a fault, sending first prompt information to prompt the target indoor unit to have a refrigerant leakage fault.

For example, based on the above example that the first number is 3 indoor units, when it is determined that only the first indoor unit has a refrigerant leakage fault, an early warning message may be sent in the form of light, sound, text, or the like, and the first warning message includes the early warning message. The identification information of the first indoor unit can also be sent to a mobile phone terminal of a user or a display of the air conditioning equipment to prompt that the first indoor unit has a refrigerant leakage fault, such as: 007 failure. Wherein 007 is a unique identification of the first indoor unit.

As another prompting mode, the first prompting information further includes the number of the target indoor units with faults. For example, when it is determined that two indoor units of the first indoor unit and the second indoor unit have refrigerant leakage faults, the first prompt message may be 2 faults: 007 and 008. Wherein 007 and 008 are the unique identification of the first indoor unit and the unique identification of the second indoor unit, respectively.

Based on the embodiment, the specific indoor unit or the specific indoor units with the refrigerant leakage fault can be known according to the first prompt message, so that a user or a maintenance worker can conveniently maintain the target indoor unit with the fault in a targeted manner when the user or the maintenance worker maintains the air conditioning equipment.

In some embodiments, based on the detailed implementation step of step S406 in fig. 7, the step of determining the refrigerant leakage failure of the target indoor unit further includes: and when the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is smaller than a second preset difference value, determining that the target indoor unit does not have refrigerant leakage fault.

In some embodiments, if there is no refrigerant leakage failure occurring in any of the indoor units during the execution of the step S406, it is determined that the refrigerant leakage failure occurs in the air conditioning apparatus due to the refrigerant leakage occurring in the outdoor unit. That is, when no refrigerant leakage failure occurs in any of the first number of target indoor units, it is determined that a refrigerant leakage failure occurs in the outdoor unit.

Based on this embodiment, if the absolute value of the temperature difference between the third indoor temperature and the second target temperature corresponding to each target indoor unit in the first number of target indoor units is smaller than the second preset difference value, it is determined that no refrigerant leakage fault occurs in each target indoor unit, and thus, the refrigerant leakage fault occurs in the outdoor unit.

In some embodiments, after determining that the outdoor unit has the refrigerant leakage fault, the controller may further perform the following step to prompt the outdoor unit to have the refrigerant leakage fault.

The method comprises the following specific steps: and when the refrigerant leakage fault of the indoor unit is determined, sending second prompt information.

Based on the embodiment, the specific outdoor unit can be known to have the refrigerant leakage fault according to the second prompt message, so that a user or a maintenance worker can conveniently maintain the failed outdoor unit in a targeted manner when the air conditioning equipment is maintained.

As an embodiment, the refrigerant leakage failure detection process is described below with reference to fig. 8 and 9, taking the first number N as an example.

Step S901, collecting a first indoor temperature of a current indoor environment and a first outdoor temperature of an outdoor environment when the air conditioning device is ready to operate, and acquiring a first target parameter.

Step S902, determining a first target temperature corresponding to the first target parameter, the first indoor temperature, and the first outdoor temperature according to the first corresponding relationship.

And step S903, acquiring a second indoor temperature corresponding to the current indoor environment when the air conditioning equipment runs for a first preset time.

Step S904, when the absolute value of the difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference, it is determined that the air conditioning device has a refrigerant leakage fault, and a first prompt message is sent.

In step S905, the N indoor valves of the N operating indoor units are closed.

Step S906, any one indoor valve in the N indoor valves is opened to control to open only one target indoor unit.

The opened indoor valve is a target indoor valve. The indoor unit corresponding to the target indoor valve is the target indoor unit.

Step 907, collecting a third indoor temperature of the current indoor environment of the target indoor unit when the target indoor unit is ready to operate, and obtaining a second target parameter corresponding to the target indoor unit.

Step S908 is to determine a second target temperature corresponding to the second target parameter, the third indoor temperature, and the third outdoor temperature according to the second corresponding relationship.

In step S909, when the air conditioning equipment operates for the second preset time, a fourth indoor temperature corresponding to the current indoor environment of the target indoor unit is obtained.

In step S910, when the absolute value of the difference between the fourth indoor temperature and the second target temperature is greater than or equal to a second preset difference, it is determined that the target indoor unit has a refrigerant leakage fault, and a second prompt message is sent.

Step S911, judging whether the N indoor units are all independently started to determine whether the refrigerant leakage fault detection of the N indoor units is finished; if yes, go to step S912; if not, returning to the step S906.

In step S912, the refrigerant leakage fault detection is ended.

The above steps can be completed by the following modules included in the fault detection apparatus shown in fig. 8: the device comprises a unit data acquisition module, a data construction module, a fault judgment module and a fault prompt module.

Specifically, the unit data acquisition module is used for acquiring indoor temperature, operating parameters and outdoor temperature. Before or during fault detection, the controller controls the group data acquisition module to acquire the indoor temperature of the indoor environment and the outdoor temperature of the outdoor environment of each indoor unit in real time.

Further, the data construction module is used for carrying out training processing or fitting processing on the historical indoor temperature, the historical outdoor temperature and the historical operating parameters to obtain a first corresponding relation and a second corresponding relation. Before fault detection, the data construction module obtains a first corresponding relation and a second corresponding relation according to historical data when refrigerant leakage faults do not occur. The historical data is different operation parameters of the air conditioning equipment, corresponding different operation time lengths under different operation parameters, corresponding different initial indoor temperatures and corresponding different outdoor temperatures, and target indoor temperatures after the air conditioning equipment operates for different operation time lengths.

Further, the fault judgment module is used for determining whether a refrigerant leakage fault occurs based on the data acquired by the unit data acquisition module and the corresponding relation constructed by the data construction module. In the fault detection process, a first target temperature is obtained by utilizing a first indoor temperature, a first outdoor temperature and a first preset time length which are acquired by a unit data acquisition module and a first corresponding relation in a data construction module. And judging whether the refrigerant leakage fault exists in the air conditioning equipment or not by comparing the first target temperature with the second indoor temperature after the air conditioning equipment operates for the first preset time. Meanwhile, under the condition that the refrigerant leakage fault of the air conditioning equipment is preliminarily judged, a second target temperature is obtained by utilizing the third indoor temperature, the second outdoor temperature and the second preset time length which are acquired by the unit data acquisition module and the second corresponding relation in the data construction module. And judging whether the target indoor unit has a refrigerant leakage fault or not by comparing the second target temperature with a fourth indoor temperature after the second preset time period of operation.

Further, the fault prompting module is used for prompting faults. And after the fault detection, displaying the identification information of the detected target indoor unit with the fault, the number of the target indoor units with the refrigerant leakage fault or the identification information of the outdoor unit.

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 in 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 invention.

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, the division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

The embodiment of the application further provides a hardware structure schematic diagram of the controller. As shown in fig. 10, the controller 103 includes a processor 901, and optionally, a memory 902 and a communication interface 903 connected to the processor 901. The processor 901, memory 902, and communication interface 903 are connected by a bus 904.

The processor 901 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 processor 901 may also be any other device having a processing function, such as a circuit, a device, or a software module. The processor 901 may also include a plurality of CPUs, and the processor 901 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 902 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk 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 902 may be separate or integrated with the processor 901. The memory 902 may include, among other things, computer program code. The processor 901 is configured to execute the computer program codes stored in the memory 902, so as to implement the fault detection method of the air conditioner provided by the embodiment of the present application.

Communication interface 903 may be used to communicate with other devices or communication networks (e.g., ethernet, radio Access Network (RAN), wireless Local Area Networks (WLAN), etc.).

The bus 904 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 904 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.

The embodiment of the present application further provides a computer-readable storage medium, which includes computer-executable instructions, and when the computer-executable instructions run on a computer, the computer is enabled to execute any one of the fault detection methods of the air conditioning equipment provided in the foregoing embodiments.

The embodiment of the present application further provides a computer program product containing computer execution instructions, which when run on a computer, causes the computer to execute any one of the fault detection methods of the air conditioning equipment provided in the foregoing embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer-executable instructions. The processes or functions according to the embodiments of the present application are generated in whole or in part when the computer-executable instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer executable instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer executable instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

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. The air conditioning equipment is characterized by comprising a controller, an outdoor unit and a plurality of indoor units, wherein the outdoor unit and the indoor units are connected with the controller; the indoor units are respectively communicated with the outdoor unit through pipelines, and each indoor unit is provided with an indoor valve; the indoor valve is used for controlling the amount of refrigerant entering the indoor unit in the pipeline;

the controller is configured to:

responding to an operation instruction, and controlling a first number of indoor valves corresponding to a first number of indoor units to be opened so as to enable the first number of indoor units to operate; the operation instruction instructs the air conditioning equipment to operate at a first target parameter; the first target parameter comprises a first preset time length and the first quantity; the first preset time length indicates the running time length of the air conditioning equipment, and the first number is the number of indoor units to be run in the plurality of indoor units;

determining a first target temperature corresponding to a first target parameter, a first indoor temperature and a first outdoor temperature according to a first corresponding relation between a first operation parameter, an initial indoor temperature, an outdoor temperature and a target indoor temperature; the first indoor temperature is the initial temperature of an indoor environment when the air conditioning equipment is not operated, and the first outdoor temperature is the outdoor environment temperature of the air conditioning equipment;

when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference value, determining that the air conditioning equipment has a refrigerant leakage fault; the second indoor temperature is the indoor temperature that the indoor environment reached when the air conditioning equipment operated for the first preset duration.

2. The air conditioning apparatus of claim 1, wherein the controller is further configured to:

and when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is smaller than a first preset difference value, determining that no refrigerant leakage fault occurs in the air conditioning equipment.

3. The air conditioning apparatus of claim 2, wherein the controller is further configured to:

under the condition that the refrigerant leakage fault of the air conditioning equipment is determined, closing the first number of indoor valves;

sequentially opening only any one of the first number of indoor valves to sequentially control each target indoor unit to operate according to a second target parameter; the second target parameter comprises a second preset time length; the opened indoor valve is a target indoor valve, and an indoor unit corresponding to the target indoor valve is a target indoor unit;

sequentially determining refrigerant leakage faults of the target indoor unit until the number of the target indoor valves which are independently opened is the first number;

the determining of the refrigerant leakage fault of the target indoor unit includes:

determining a second target temperature corresponding to the second target parameter and the third indoor temperature according to a second corresponding relation between a second operation parameter, the initial indoor temperature and the target indoor temperature; the third indoor temperature is the initial temperature of the indoor environment when the target indoor unit operates;

when the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is greater than or equal to a second preset difference value, determining that the target indoor unit fails; and the fourth indoor temperature is when the target indoor unit operates for a second preset time period, and the indoor environment of the target indoor unit reaches the indoor temperature.

4. The air conditioning apparatus of claim 3, wherein the controller is further configured to:

and when the target indoor unit is determined to have a fault, sending first prompt information to prompt the target indoor unit to have a refrigerant leakage fault.

5. The air conditioning apparatus of claim 3, wherein the controller is further configured to:

and when the absolute value of the temperature difference between the fourth indoor temperature and the second target temperature is smaller than a second preset difference value, determining that no refrigerant leakage fault occurs in the target indoor unit.

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

and when no refrigerant leakage fault occurs in the first number of target indoor units, determining that the refrigerant leakage fault occurs in the outdoor unit.

7. The air conditioning apparatus of claim 6, wherein the controller is further configured to:

and when the indoor unit is determined to have the refrigerant leakage fault, sending second prompt information to prompt the outdoor unit to have the refrigerant leakage fault.

8. Air conditioning apparatus according to any of claims 1 to 7, characterized in that the first or second operating parameters further comprise at least one or more of the following: air output, air speed, air conditioner rotating speed and working frequency of the compressor.

9. A fault detection method of an air conditioning apparatus, characterized by comprising:

responding to an operation instruction, and controlling a first number of indoor valves corresponding to a first number of indoor units to be opened so as to enable the first number of indoor units to operate; the operation instruction instructs the air conditioning equipment to operate at a first target parameter; the first target parameter comprises a first preset duration and the first quantity; the first preset time length indicates the running time length of the air conditioning equipment, and the first number is the number of indoor units to be run in the plurality of indoor units;

according to a first corresponding relationship of the first operating parameter, the initial indoor temperature, the outdoor temperature and the target indoor temperature, determining a first target temperature corresponding to the first target parameter, the first indoor temperature and the first outdoor temperature; the first indoor temperature is the initial temperature of an indoor environment when the air conditioning equipment is not operated, and the first outdoor temperature is the outdoor environment temperature of the air conditioning equipment;

when the absolute value of the temperature difference between the second indoor temperature and the first target temperature is greater than or equal to a first preset difference value, determining that the air conditioning equipment has a refrigerant leakage fault; the second indoor temperature is the indoor temperature that the indoor environment reaches when the air conditioning equipment operates the first preset duration.

10. The fault detection method of claim 9, further comprising: