CN115507518A

CN115507518A - Method and device for determining fault of one-way valve, air conditioner and storage medium

Info

Publication number: CN115507518A
Application number: CN202211157403.8A
Authority: CN
Inventors: 李阳; 许文明; 王飞; 林超; 崔文娟
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2022-12-23
Also published as: WO2024060437A1

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a method for determining one-way valve faults, which comprises the following steps: acquiring an operation mode of an air conditioner and preset parameters before and after a one-way valve; calculating the difference value of the preset parameters before and after the one-way valve; and determining the fault condition of the one-way valve according to the difference value between the operation mode and the preset parameter. This enables a determination to be made as to whether the corresponding check valve in the variable flow diversion structure is malfunctioning, and the specific type of malfunction. So that the fault of the one-way valve can be found in time to ensure the normal operation of the air conditioner. The application also discloses a device, an air conditioner and a storage medium for determining the fault of the check valve.

Description

Method and device for determining fault of one-way valve, air conditioner and storage medium

Technical Field

The present application relates to the field of intelligent household appliance technologies, and for example, to a method and an apparatus for determining a failure of a check valve, an air conditioner, and a storage medium.

Background

The variable split function of the air conditioner is realized by on-off control of the one-way valve. The heat exchange pipelines of the heat exchanger are connected in parallel or in series through the on-off of the one-way valve, so that the circulation path of a refrigerant in the heat exchanger is changed. If the one-way valve is not opened or closed, or the refrigerant is not smooth in circulation, the flow is not accurate, the flow fluctuates and the like, the flow distribution is influenced, the heat exchange performance of the heat exchanger and the capacity and the energy efficiency of the air conditioner are further influenced, and even the reliability of the air conditioner is influenced.

The related art discloses a fault detection and processing method for an air conditioner supercooling pipe set, which comprises the following steps: starting an air conditioner for heating; recording the time required from the heating start to the stabilization of the exhaust temperature of the compressor; judging whether the time required by stabilization is less than a first preset time or not; if so, detecting the air inlet temperature and the air outlet temperature of the indoor unit of the air conditioner, and calculating the temperature difference between the air inlet temperature and the air outlet temperature; judging whether the temperature difference value is smaller than a first preset temperature difference or not; and if so, determining that the one-way valve in the supercooling pipe group is in failure.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the function of the one-way valve in the related art in the air conditioning system is to change the length of the capillary tube in the air conditioners with different lengths of the refrigerating and heating capillary tubes, and the one-way valve is essentially a throttling device. The fault detection method is also applicable to a throttle device, so that a fault can be checked by using the exhaust temperature. However, the function of the check valve in the variable shunt structure is not throttling, but on-off, so the solution of the related art is not suitable for troubleshooting of the check valve in the variable shunt structure.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a method and a device for determining a fault of a one-way valve, an air conditioner and a storage medium, so as to provide a scheme suitable for troubleshooting of the one-way valve in a variable shunt structure.

In some embodiments, the method comprises: acquiring an operation mode of an air conditioner and preset parameters before and after a one-way valve; calculating the difference value of the preset parameters before and after the one-way valve; and determining the fault condition of the one-way valve according to the difference value between the operation mode and the preset parameter.

In some embodiments, the apparatus comprises: comprising a processor and a memory having stored thereon program instructions, the processor being configured, upon execution of the program instructions, to perform the aforementioned method for determining a malfunction of a one-way valve.

In some embodiments, the air conditioner includes: such as the aforementioned means for determining a check valve failure.

In some embodiments, the storage medium stores program instructions that, when executed, perform the aforementioned method for determining a failure of a check valve.

The method and the device for determining the fault of the one-way valve, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:

and acquiring the running mode of the air conditioner and the preset parameters before and after the one-way valve, and calculating the difference value of the preset parameters before and after the one-way valve. And judging whether the difference value is within a normal difference value range corresponding to the current operation mode, thereby determining whether the corresponding one-way valve in the variable shunt structure has a fault and the specific fault type. So that the fault of the one-way valve can be found in time to ensure the normal operation of the air conditioner.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a method for determining a check valve failure provided by embodiments of the present disclosure;

FIG. 3 is a schematic diagram of another method for determining a check valve failure provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another method for determining a check valve failure provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another method for determining a check valve failure provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another method for determining a check valve failure provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of an apparatus for determining a check valve failure provided by embodiments of the present disclosure;

fig. 8 is a schematic diagram of another apparatus for determining a check valve failure provided by an embodiment of the present disclosure.

Reference numerals:

10. a heat exchanger; 11. a first liquid separator; 12. a second liquid separator; 13. a third liquid distributor; 14. a fourth liquid distributor; 15. a first heat exchange branch; 16. a second heat exchange branch; 17. a third heat exchange branch; 18. a first bypass line; 181. a first check valve; 19. a second bypass line; 191. a second one-way valve; 20. a four-way valve; 30. a first main tube; 40. a second main tube.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponding to B refers to an association or binding relationship between a and B.

As shown in connection with fig. 1, embodiments of the present disclosure provide a heat exchanger 10, including: a first liquid separator 11, a second liquid separator 12, a third liquid separator 13, a fourth liquid separator 14 and a heat exchange pipeline.

The heat exchange pipeline includes: a first heat exchange branch 15, a second heat exchange branch 16 and a third heat exchange branch 17.

The liquid collecting end of the first liquid separator 11 is communicated with the indoor heat exchanger through the first main pipe 30.

The liquid separating end of the first liquid separator 11 is communicated with the first end of the first heat exchange branch 15. The liquid separating end of the first liquid separator 11 is also communicated with the liquid collecting end of the second liquid separator 12 through a first bypass pipeline 18. The first bypass line 18 is provided with a first check valve 181 for limiting the refrigerant in the first bypass line 18 to flow only from the first liquid separator 11 to the second liquid separator 12.

The liquid separating end of the second liquid separator 12 is communicated with the first end of the second heat exchange branch 16. The liquid separating end of the second liquid separator 12 is also communicated with the first end of the third heat exchange branch 17.

And the second end of the first heat exchange branch 15 is communicated with the liquid separating end of the third liquid distributor 13. And a second end of the second heat exchange branch 16 is communicated with a liquid separating end of the third liquid distributor 13. The liquid collecting end of the third liquid distributor 13 is communicated with the liquid separating end of the fourth liquid distributor 14 through a second bypass pipeline 19. The second bypass line 19 is provided with a second check valve 191 for limiting the refrigerant in the second bypass line 19 to flow from the third liquid separator 13 to the fourth liquid separator 14 only.

And the second end of the third heat exchange branch 17 is communicated with the liquid separating end of the fourth liquid distributor 14. The liquid collecting end of the fourth liquid distributor 14 is communicated with the four-way valve 20 through a second main pipe 40.

When the air conditioner operates in the heating mode, the refrigerant flows in from the first main pipe 30. Under the action of the liquid separation of the first liquid separator 11 and the second liquid separator 12, the liquid flows into the first heat exchange branch 15, the second heat exchange branch 16 and the third heat exchange branch 17 respectively. Then, they are merged in the second main pipe 40 and flow into the four-way valve 20. Thus, all the heat exchange branches are connected in parallel.

When the air conditioner operates in the cooling mode, the refrigerant flows in from the second main pipe 40. Under the blocking action of the first check valve 181 and the second check valve 191, the heat flows into the third heat exchange branch 17, the second heat exchange branch 16 and the first heat exchange branch 15 in sequence. And finally flows into the indoor heat exchanger through the first main pipe 30. Thus, all the heat exchange branches are connected in series.

As shown in fig. 2, an embodiment of the present disclosure provides a method for determining a fault of a check valve, including:

s201, the air conditioner obtains the running mode and the preset parameters before and after the one-way valve.

S202, the air conditioner calculates the difference value of the preset parameters before and after the one-way valve.

And S203, the air conditioner determines the fault condition of the one-way valve according to the difference value between the operation mode and the preset parameter.

And sensors are arranged at the front and rear positions of each one-way valve to acquire the front and rear preset parameters of the corresponding one-way valve. The preset parameter may be temperature or pressure. If the preset parameter is temperature, the sensor is a temperature sensor. If the preset parameter is pressure, the sensor is a pressure sensor. And simultaneously acquiring the operation mode of the air conditioner. Here, the cooling mode and the heating mode are mainly distinguished. This is because, when the air conditioner operates in the cooling mode, the check valve needs to be closed, i.e., no leakage occurs. When the air conditioner operates in the heating mode, the check valve needs to be fully opened. That is, when the air conditioner operates in different modes, there are different requirements on the opening and closing states of the check valve. In addition, when the air conditioner operates in the self-cleaning mode, the frosting stage corresponds to the heating mode, and the defrosting stage corresponds to the cooling mode. Therefore, when the air conditioner operates in the self-cleaning mode, it is necessary to determine an equivalent operation mode through its operation stage.

The sensor is in communication connection with a processor of the air conditioner to transmit the acquired temperature or pressure to the processor. And then the processor calculates the difference value of preset parameters before and after the same one-way valve, namely the temperature difference value or the pressure difference value. And determining the fault condition of the one-way valve according to the running mode of the air conditioner and the difference value of the preset parameters.

In the embodiment of the disclosure, the operation mode of the air conditioner and the preset parameters before and after the one-way valve are obtained, and the difference value of the preset parameters before and after the one-way valve is calculated. And judging whether the difference value is within a normal difference value range corresponding to the current operation mode, thereby determining whether the corresponding one-way valve in the variable shunt structure has a fault and the specific fault type. So that the fault of the one-way valve can be found in time to ensure the normal operation of the air conditioner.

With reference to fig. 3, another method for determining a fault of a check valve is provided in an embodiment of the present disclosure, including:

s201, the air conditioner obtains the running mode of the air conditioner and preset parameters of the air conditioner before and after the one-way valve.

And S213, the air conditioner acquires the running frequency of the compressor.

And S223, the air conditioner determines a target difference threshold value according to the running frequency.

And S233, the air conditioner determines the fault condition of the one-way valve according to the operation mode, the difference value of the preset parameters and the target difference value threshold.

And acquiring the current running frequency of the compressor. The difference of the preset parameters is different when the operating frequency is different. This is because the larger the operating frequency is, the larger the flow rate of the refrigerant is, and the larger the difference between the preset parameters before and after the check valve is. And determining the fault condition of the one-way valve according to the operation mode and the size relation between the difference value of the preset parameters and the target difference value threshold. In this way, based on the operating frequency of the compressor, a matching target difference threshold is determined, thereby accurately determining the fault condition of the check valve.

Optionally, in step S223, the air conditioner determines the target difference threshold according to the operation frequency, including:

and the air conditioner determines a target difference threshold corresponding to the current operating frequency according to the incidence relation between the frequency and the difference threshold.

The processor of the air conditioner stores the correlation between the frequency and the difference value threshold value. The association includes a correspondence of one or more frequencies to a difference threshold. And if the preset parameter is the temperature, the target difference threshold is the target temperature difference threshold. And if the preset parameter is pressure, the target difference threshold is a target pressure difference threshold. The larger the operating frequency interval, the larger the temperature or pressure difference threshold. See table 1 for details.

TABLE 1 correlation between frequency and Difference threshold

Operating frequency (Hz)	Temperature threshold (. Degree. C.)	Differential pressure threshold (Pa)
			(10,20]	T ₁	P ₁
(20,30]	T ₂	P ₂
			(30,40]	T ₃	P ₃
…	…	…
			(90,100]	T _n-1	P _n-1
(100,120]	T _n	P _n

In Table 1, T ₁ >T ₂ >…>T _n ，P ₁ >P ₂ >…>P _n . If the current operation frequency is 30Hz, the temperature difference threshold value is determined to be T ₂ Differential pressure threshold of P ₂ 。

With reference to fig. 4, another method for determining a fault of a check valve is provided in an embodiment of the present disclosure, including:

And S213, the air conditioner acquires the running frequency of the compressor.

S2133, determining that the one-way valve has a leakage fault when the operation mode of the air conditioner is a refrigeration mode and the difference value of the preset parameter is smaller than the target difference value threshold and larger than the parameter set value.

S2233, determining that the one-way valve is opened completely and cannot be closed under the condition that the operation mode of the air conditioner is a refrigeration mode and the difference value of the preset parameters is smaller than the set value of the parameters; wherein the parameter setting value is less than the target difference threshold.

And S2333, determining that the one-way valve has an incomplete opening fault under the condition that the operation mode of the air conditioner is a heating mode and the difference value of the preset parameters is greater than the target difference value threshold.

When the air conditioner runs in a refrigeration mode, the one-way valve is required to be in a closed state. Thus, a failure is considered to occur if the one-way valve is not closed. When the temperature before and after the one-way valve is smaller than the target temperature difference threshold value and larger than the temperature set value, or the pressure before and after the one-way valve is smaller than the target pressure difference threshold value and larger than the pressure set value, the difference value of the preset parameters before and after the one-way valve is smaller than the normal value at the moment, but the degree is not very large. Therefore, it is determined that the check valve has a leak failure at this time, and a corresponding failure code E1 is reported. If the temperature before and after the one-way valve is smaller than the set temperature value or the pressure before and after the one-way valve is smaller than the set pressure value, the difference value of the preset parameters before and after the one-way valve is smaller than the normal value and the degree is large. Therefore, the fault that the check valve is opened fully and cannot be closed at the moment is determined, and a corresponding fault code E2 is reported.

When the air conditioner runs in a heating mode, the one-way valve is required to be in an opening state. Thus, a failure is considered to occur if the check valve is not open. When the temperature before and after the one-way valve is larger than the target temperature threshold value, or the pressure before and after the one-way valve is larger than the target pressure threshold value, the difference value of the preset parameters before and after the one-way valve is larger than the normal value. Therefore, it is determined that the non-complete opening failure of the check valve occurs at this time, and a corresponding failure code E4 is reported.

Therefore, the specific fault of the one-way valve can be determined based on the different on-off states of the one-way valve required by the air conditioner in different modes and the difference value of the preset parameters before and after the one-way valve.

As shown in fig. 5, another method for determining a fault of a check valve is provided in the embodiments of the present disclosure, including:

And S213, the air conditioner acquires the running frequency of the compressor.

And S2433, the air conditioner acquires the return air temperature of the branch corresponding to the fault one-way valve.

S2533, determining that the liquid impact damages the compressor to cause the fault when the return air temperature of the air conditioner is lower than the target return air temperature threshold.

Optionally, an outlet of each branch of the heat exchanger is provided with a temperature sensor to obtain an outlet temperature of the corresponding branch. Theoretically, when the air conditioner operates in a heating mode, all the branches are connected in parallel, so that the outlet temperatures of all the branches are the same. When the outlet temperature of a certain branch is different from the outlet temperature of other branches or the difference value is not in a preset interval, the flow of the branch is indicated to have a problem. And when the non-complete opening fault of the one-way valve is determined, acquiring the outlet temperature of each branch to assist in judging the non-complete opening degree of the one-way valve. Specifically, the processor of the air conditioner stores the correlation between the running frequency of the compressor, the temperature difference value of the outlet of the branch and the incomplete opening degree of the one-way valve. Under the same operating frequency, the larger the difference between the outlet temperature of one branch and the outlet temperature of other branches is, the larger the degree that the fault one-way valve is not completely opened is.

Optionally, a temperature sensor is disposed at the air return end of each branch to obtain the air return temperature of the corresponding branch. When the return air temperature of a certain branch is smaller than the return air temperature threshold value, the flow of the branch is indicated to have a problem. And when the non-complete opening fault of the one-way valve is determined, acquiring the return air temperature of each branch to assist in judging the degree of the non-complete opening of the fault one-way valve. Specifically, the processor of the air conditioner stores the correlation between the operating frequency of the compressor, the return air temperature and the degree to which the check valve is not fully opened. Under the same operation frequency, the larger the difference between the return air temperature of a certain branch and the return air temperature threshold value is, the larger the degree that the fault one-way valve is not completely opened is.

And determining a target return air temperature threshold corresponding to the current operating frequency according to the incidence relation between the frequency and the return air temperature threshold. The greater the operating frequency, the greater the target return air temperature threshold. When the return air temperature is lower than the target return air temperature threshold value, it indicates that a large amount of liquid refrigerant is likely to completely return to the compressor without exchanging heat. Therefore, it is determined that the liquid impact damage compressor fault has occurred at this time, and a corresponding fault code E5 is reported.

In this way, after it is determined that the non-complete opening failure of the check valve has occurred, it is further determined whether a more serious failure, i.e., a liquid hammer damage to the compressor, is likely to occur based on the outlet temperature or return air temperature of the branch. Therefore, potential danger is found in time, and normal operation of the compressor is guaranteed.

As shown in fig. 6, an embodiment of the present disclosure provides a method for determining a check valve failure, including:

And S204, the air conditioner executes a corresponding fault elimination scheme according to the fault condition of the one-way valve.

And after the fault condition of the one-way valve is determined, executing a corresponding and matched fault elimination scheme according to the fault condition of the one-way valve.

Specifically, the severity of the fault is first determined based on the fault condition. When the air conditioner runs in a refrigeration mode, the one-way valve is required to be in a closed state. Therefore, the full open failure of the check valve is more severe than the leak failure. When the air conditioner operates in the heating mode, the check valve is required to be in an open state, and the normal operation of the compressor is a basic requirement of the air conditioner. Therefore, the severity of the liquid impact damage compressor failure is greater than the incomplete start failure. And then executing fault elimination schemes with different strengths according to the fault severity. Optionally, the greater the severity of the fault, the more robust the troubleshooting scheme is performed.

Alternatively, if it is determined that the fault is a light fault, such as a leak fault and an incomplete open fault, the number of faults is determined. And recording the failure times +1 every time a light failure occurs. And when the failure times are larger than or equal to the first preset times, entering a failure troubleshooting program S1 when the air conditioner is started to operate next time. Optionally, the first preset number of times is greater than or equal to 1. When the troubleshooting program S1 is carried out, controlling the compressor to operate at a first preset frequency, such as 45 Hz; the check valve opens to a first preset opening, for example 480; controlling the four-way valve to execute the following actions: and opening the first preset time length, closing the second preset time length, and continuously performing M cycles. And then controlling the four-way valve to change the direction, controlling the four-way valve to open for the first preset time length again, closing for the second preset time length, and continuously performing M cycles. Until the reversing times reach a second preset time.

If it is determined that there is a serious fault, such as a full-on, non-closing fault and a liquid hammer damage compressor fault, the troubleshooting routine S2 is directly run. When the troubleshooting program S2 is carried out, controlling the compressor to operate at a second preset frequency, such as 65 Hz; the check valve opens to a second preset opening, for example 600; controlling the four-way valve to execute the following actions: and opening the third preset time period, closing the fourth preset time period, and continuously performing N cycles. And then controlling the four-way valve to change the direction, controlling the four-way valve to be opened for a third preset time period again, closing for a fourth preset time period, and continuously performing N cycles. Until the number of commutation times reaches a third preset number. Wherein the second preset frequency is greater than the first preset frequency; the second preset opening degree is larger than the first preset opening degree; the third preset time length is longer than the first preset time length; the fourth preset time length is longer than the second preset time length; n is greater than M. The third preset number is greater than the second preset number. In this way, a more intensive troubleshooting action is performed in order to efficiently troubleshoot the failure.

Alternatively, the time length for controlling the four-way valve to be opened and closed can be set according to actual needs, and can be selected from 1 to 60s, for example, 10s. By reversing the four-way valve, the refrigerant repeatedly impacts the one-way valve, so that the condition that the one-way valve is not normal or is blocked is eliminated.

Optionally, after the troubleshooting scheme is performed, the previously operating cooling/heating mode is restarted, and the temperature or pressure difference across the check valve is re-monitored. After the set times of detection, if the temperature difference or the pressure difference is not increased in the refrigeration mode, the physical blocking fault of the one-way valve is determined, and a corresponding fault code E3 is reported. And if the temperature difference or the pressure difference is not reduced in the heating mode, determining that the one-way valve has a physical dead-locking fault, and reporting a corresponding fault code E3.

Optionally, a small vibration device is arranged outside each check valve, and the vibration mode can be ultrasonic vibration or mechanical vibration. When the fault removing scheme is executed, the vibration device can be controlled to be started to replace or assist in removing faults through reversing of the four-way valve. When it is determined that the fault is light, the vibration frequency of the vibration device is controlled to be a first frequency. And when the serious fault is determined, controlling the vibration frequency of the vibration device to be a second frequency. The second frequency is greater than the first frequency. Therefore, the valve core is reset or released from being stuck by the vibration of the vibration device.

Determining that the fault has been cleared if any of the following conditions are met:

(1) The temperature difference value of the re-monitoring in the refrigeration mode is increased to be above the corresponding temperature difference threshold value;

(2) The pressure difference value of the re-monitoring in the refrigeration mode is increased to be above the corresponding pressure threshold value;

(3) The outlet temperature of the branch in which the one-way valve is positioned is the same as that of other branches;

(4) The difference value between the outlet temperature of the branch where the one-way valve is located and the outlet temperature of other branches is within a preset interval;

(5) The return air temperature of the branch where the one-way valve is located is greater than or equal to the return air temperature threshold.

If the fault removing scheme is executed, the fault removing method does not meet any condition, and the fault cannot be removed through the refrigerant impact of the air conditioner or the vibration of the vibration device, and professional workers are required to maintain the fault removing method. At this time, the corresponding fault code E3 is continuously reported so as to remind the relevant staff.

As shown in fig. 7, an embodiment of the present disclosure provides an apparatus for determining a fault of a check valve, including: an acquisition module 71, a calculation module 72 and a determination module 73. The acquisition module 71 is configured to acquire an operation mode of the air conditioner and preset parameters before and after the check valve. The calculation module 72 is configured to calculate the difference of the preset parameters before and after the check valve. The determination module 73 is configured to determine a fault condition of the check valve based on the difference between the operating mode and the preset parameter.

By adopting the device for determining the fault of the one-way valve, the operation mode of the air conditioner and the preset parameters before and after the one-way valve are obtained, and the difference value of the preset parameters before and after the one-way valve is calculated. And judging whether the difference value is within a normal difference value range corresponding to the current operation mode, thereby determining whether the corresponding one-way valve in the variable shunt structure has a fault and the specific fault type. So that the fault of the one-way valve can be found in time to ensure the normal operation of the air conditioner.

As shown in fig. 8, an apparatus for determining a check valve fault according to an embodiment of the present disclosure includes a processor (processor) 80 and a memory (memory) 81. Optionally, the apparatus may also include a Communication Interface 82 and a bus 83. The processor 80, the communication interface 82 and the memory 81 can communicate with each other through the bus 83. Communication interface 82 may be used for information transfer. The processor 80 may invoke logic instructions in the memory 81 to perform the method for determining a check valve failure of the above-described embodiments.

In addition, the logic instructions in the memory 81 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 81 is used as a computer readable storage medium for storing software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 80 executes functional applications and data processing by executing program instructions/modules stored in the memory 81, i.e. implements the method for determining a check valve failure in the above embodiments.

The memory 81 may include a storage program area and a storage data area, wherein the storage program 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 the use of the terminal device, and the like. Further, the memory 81 may include a high-speed random access memory and may also include a nonvolatile memory.

The embodiment of the disclosure provides an air conditioner, which comprises the device for determining the fault of the one-way valve.

Embodiments of the present disclosure provide a storage medium having stored thereon computer-executable instructions configured to perform the above-described method for determining a failure of a check valve.

The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend 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 disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. 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. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure 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 flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for determining a check valve failure, comprising:

acquiring an operation mode of an air conditioner and preset parameters before and after a one-way valve;

calculating the difference value of the preset parameters before and after the one-way valve;

and determining the fault condition of the one-way valve according to the difference value between the operation mode and the preset parameter.

2. The method of claim 1, wherein determining a fault condition of the check valve based on a difference between the operating mode and a predetermined parameter comprises:

acquiring the operating frequency of a compressor;

determining a target difference threshold value according to the operating frequency;

and determining the fault condition of the one-way valve according to the operation mode, the difference value of the preset parameters and the target difference value threshold.

3. The method of claim 2, wherein determining a fault condition of the check valve based on the operating mode, the difference between the preset parameters, and the target difference threshold comprises:

determining that the one-way valve has a leakage fault under the conditions that the operation mode is a refrigeration mode and the difference value of the preset parameters is smaller than the target difference value threshold and larger than the parameter set value;

under the condition that the operation mode is a refrigeration mode and the difference value of the preset parameters is smaller than the set value of the parameters, determining that the one-way valve has a fault that the one-way valve is opened fully and cannot be closed;

wherein the parameter setting value is less than the target difference threshold.

4. The method of claim 2, wherein determining a fault condition of the check valve based on the operating mode, the difference between the preset parameters, and the target difference threshold comprises:

and under the condition that the operation mode is a heating mode and the difference value of the preset parameters is greater than the target difference value threshold, determining that the one-way valve has an incomplete opening fault.

5. The method of claim 4, wherein determining a fault condition of the check valve based on the operating mode, the difference between the preset parameters, and the target difference threshold further comprises:

under the condition that the one-way valve is determined to have the incomplete opening fault, the return air temperature of a branch corresponding to the fault one-way valve is obtained;

and under the condition that the return air temperature is lower than the target return air temperature threshold value, determining that the fault of the liquid impact damaged compressor occurs.

6. The method according to any one of claims 1 to 5, wherein after said determining a fault condition of the non-return valve according to the difference between the operating mode and a preset parameter, the method further comprises:

and executing a corresponding troubleshooting scheme according to the fault condition of the one-way valve.

7. The method according to claim 6, wherein the performing of the corresponding troubleshooting plan based on the failure condition of the one-way valve comprises:

determining the severity of the fault according to the fault condition;

and executing fault elimination schemes with different strengths according to the severity of the fault.

8. An apparatus for determining a fault in a check valve, comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform a method for determining a fault in a check valve according to any of claims 1 to 7 when executing the program instructions.

9. An air conditioner characterized by comprising the apparatus for determining a failure of a check valve according to claim 8.

10. A storage medium storing program instructions, characterized in that said program instructions, when executed, perform a method for determining a malfunction of a one-way valve according to any one of claims 1 to 7.