CN117469870B

CN117469870B - Fault early warning method, device, equipment and storage medium

Info

Publication number: CN117469870B
Application number: CN202311805470.0A
Authority: CN
Inventors: 牛二帅; 卢起彪; 李凯; 丁瑞; 华晨涛
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-04-05
Anticipated expiration: 2043-12-26
Also published as: CN117469870A

Abstract

The disclosure provides a fault early warning method, a device, equipment and a storage medium, wherein the fault early warning method comprises the steps of detecting high-temperature-level exhaust pressure and high-temperature-level exhaust temperature of a high-temperature-level refrigerating system in a cascade refrigerating system; judging whether a fault exists in the high-temperature-level refrigeration system or not based on the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature; and under the condition that the high-temperature-level refrigerating system is determined to have faults, determining the fault type of the high-temperature-level refrigerating system based on the high-temperature-level balance pressure of the high-temperature-level refrigerating system. In the method, the fault can be accurately positioned when the high-temperature-level refrigerating system fails, the waiting time of temperature rise after the fault occurs in the cascade refrigerating system is shortened, so that a user can be reminded of quickly solving the problem in time, for example, samples in a low-temperature preservation box are transferred in time, and sample quality is guaranteed.

Description

Fault early warning method, device, equipment and storage medium

Technical Field

The disclosure relates to the technical field of refrigeration, and in particular relates to a fault early warning method, device, equipment and storage medium.

Background

The low-temperature preservation box is mainly applied to institutions such as hospitals, medical enterprises and scientific research institutions, is generally used for storing precious samples, and has extremely high reliability requirements. Therefore, besides a complete control method, the low-temperature preservation box also needs to have a reliable fault early warning method, so that faults of all parts of the low-temperature preservation box can be accurately judged, and when faults occur, workers can be helped to accurately position the faults, make more reasonable selection and rapidly repair or transfer samples.

The low-temperature preservation boxes in the related art all alarm after detecting that the box temperature is too high, and when a user finds a fault, the fault is long, and the quality of a sample is adversely affected; in addition, the existing low-temperature preservation box basically only has temperature early warning, only detects box temperature and tube temperature to perform fault early warning, and the fault early warning is not performed on a high-temperature-level refrigerating system in the cascade refrigerating system, so that accurate fault early warning cannot be achieved.

Disclosure of Invention

In view of this, in order to solve the technical problem that in the prior art, no fault early warning is performed on a high-temperature-level refrigerating system in a cascade refrigerating system, and accurate fault early warning cannot be performed, the disclosure provides a fault early warning method, device, equipment and storage medium.

According to a first aspect of embodiments of the present disclosure, there is provided a fault early-warning method, including:

detecting high-temperature-stage exhaust pressure and high-temperature-stage exhaust temperature of a high-temperature-stage refrigerating system in the cascade refrigerating system;

judging whether the high-temperature-stage refrigeration system has a fault or not based on the high-temperature-stage exhaust pressure and the high-temperature-stage exhaust temperature;

and under the condition that the high-temperature-level refrigerating system is determined to have faults, determining the fault type of the high-temperature-level refrigerating system based on the high-temperature-level balance pressure of the high-temperature-level refrigerating system.

In an alternative embodiment of the present invention,

the method for detecting the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature of the high-temperature-level refrigerating system in the cascade refrigerating system comprises the following steps:

if the starting signal of the high-temperature-stage compressor of the high-temperature-stage refrigerating system is detected, detecting the high-temperature-stage exhaust pressure and the high-temperature-stage exhaust temperature;

the determining whether the high-temperature-level refrigeration system has a fault based on the high-temperature-level discharge pressure and the high-temperature-level discharge temperature includes:

if the starting signal of the high-temperature-stage compressor is detected, determining that a fault exists in the starting stage of the high-temperature-stage refrigerating system if the high-temperature-stage exhaust temperature and/or the high-temperature-stage exhaust pressure in a first set period of time are/is not increased; and/or the number of the groups of groups,

and if the starting signal of the high-temperature-stage compressor is detected, the high-temperature-stage exhaust temperature and the high-temperature-stage exhaust pressure in a first set period of time are both increased, and it is determined that no fault exists in the starting stage of the high-temperature-stage refrigeration system.

In an alternative embodiment, the determining whether the high temperature stage refrigeration system has a fault based on the high temperature stage discharge pressure and the high temperature stage discharge temperature includes:

If the high-temperature-level refrigerating system is determined to have no fault in the starting stage, detecting the corresponding environment temperature and high-temperature-level compressor frequency of the cascade refrigerating system;

and judging whether a fault exists in the operation stage of the high-temperature-stage refrigeration system based on the environment temperature and the high-temperature-stage compressor frequency.

In an alternative embodiment, the determining whether there is a fault in an operation phase of the high temperature stage refrigeration system based on the ambient temperature and the high temperature stage compressor frequency includes:

judging whether a first reduction value of the high-temperature-stage exhaust temperature in a second set time period is larger than a first set value under the condition that the ambient temperature and the high-temperature-stage compressor frequency are not changed;

and if the first reduction value is larger than the first set value, determining that a fault exists in the operation stage of the high-temperature-stage refrigeration system.

judging whether a second decrease value of the high-temperature-stage exhaust temperature in a third set time period is larger than a second set value under the condition that the ambient temperature is unchanged and the frequency of the high-temperature-stage compressor is increased;

And if the second descending value is larger than the second set value, determining that a fault exists in the operation stage of the high-temperature-stage refrigeration system.

judging whether the rising value of the low-temperature-level exhaust temperature in the fourth set time period is larger than a third set value or not under the condition that the ambient temperature and the frequency of the high-temperature-level compressor are not changed, and judging whether the temperature of the low-temperature-level refrigerant outlet of the intermediate heat exchanger of the cascade refrigeration system is rising or not;

and if the rising value is larger than the third set value and the low-temperature-level refrigerant outlet temperature rises, determining that a fault exists in the operation stage of the high-temperature-level refrigeration system.

In an alternative embodiment, the determining, in the case of determining that the high-temperature-stage refrigeration system has a fault, the fault type of the high-temperature-stage refrigeration system based on the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system includes:

in the event that a fault is determined to exist in the start-up phase of the high temperature stage refrigeration system,

If the high-temperature-level balance pressure is greater than or equal to the set pressure, determining that the fault type is a high-temperature-level compressor fault; and/or the number of the groups of groups,

and if the high-temperature-level balance pressure is smaller than the set pressure, determining that the fault type is a high-temperature-level refrigerant leakage fault.

controlling the high-temperature-stage compressor to be powered off under the condition that the high-temperature-stage refrigerating system is determined to have faults in the operation stage;

judging whether the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor after power failure reach balance within a fifth set duration;

and under the condition that the high-temperature-level exhaust pressure and the high-temperature-level suction pressure after the high-temperature-level compressor is powered off are not balanced within the fifth set time period, if the difference value between the high-temperature-level exhaust pressure and the high-temperature-level suction pressure is in a set interval, determining that the fault type is a high-temperature-level capillary tube blockage fault.

In an alternative embodiment of the present invention,

the determining, based on the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system, the fault type of the high-temperature-stage refrigeration system under the condition that the high-temperature-stage refrigeration system is determined to have faults comprises:

under the condition that the high-temperature-level exhaust pressure and the high-temperature-level suction pressure reach balance within the fifth set time period, determining the fault type based on the high-temperature-level balance pressure;

the determining the fault type based on the high temperature level equilibrium pressure includes:

In an alternative embodiment, after the determining the fault type of the high-temperature-stage refrigeration system, the fault early-warning method includes:

and outputting early warning information corresponding to the fault type.

In an alternative embodiment, the fault type includes at least one of:

high temperature level capillary tube blocking failure, high temperature level compressor failure, high temperature level refrigerant leakage failure.

According to a second aspect of the embodiments of the present disclosure, there is provided a fault early-warning device, including:

the detection module is used for detecting the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature of the high-temperature-level refrigerating system in the cascade refrigerating system;

the determining module is used for judging whether the high-temperature-level refrigerating system has faults or not based on the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature;

the determining module is further configured to determine a fault type of the high-temperature-stage refrigeration system based on a high-temperature-stage balance pressure of the high-temperature-stage refrigeration system when it is determined that the high-temperature-stage refrigeration system has a fault.

According to a third aspect of embodiments of the present disclosure, there is provided a refrigeration apparatus comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to perform the fault pre-warning method of any one of the first aspects.

According to a fourth aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium, which when executed by a processor of a refrigeration device, causes the refrigeration device to perform the fault warning method as in any of the first aspects.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: in the method, the fault early warning analysis of the high-temperature-level refrigerating system in the cascade refrigerating system is carried out through data such as high-temperature-level exhaust pressure, high-temperature-level exhaust temperature and high-temperature-level balance pressure in the cascade refrigerating system, so that the fault type of the high-temperature-level refrigerating system is determined, the fault can be accurately positioned when the high-temperature-level refrigerating system breaks down, the waiting time of temperature rise after the fault in the cascade refrigerating system is shortened, and a user can be reminded of quickly solving the problem in time, for example, samples in a low-temperature preservation box are transferred in time, the quality of the samples is guaranteed, and the like.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a flow chart illustrating a fault early warning method according to a first exemplary embodiment.

Fig. 2 is a flow chart illustrating a fault early warning method according to a second exemplary embodiment.

Fig. 3 is a flowchart illustrating a fault early warning method according to a third exemplary embodiment.

Fig. 4 is a block diagram illustrating a fault early warning apparatus according to an exemplary embodiment.

Fig. 5 is a block diagram of a refrigeration appliance according to an exemplary embodiment.

Fig. 6 is a schematic diagram of a refrigeration appliance shown according to an exemplary embodiment.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

It should be noted that, the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Further advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure in the present specification, by describing embodiments of the present application with reference to the accompanying drawings and preferred examples. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not limitation to the scope of the present application.

In order to solve the technical problem that in the prior art, no fault early warning is performed on a high-temperature-level refrigerating system in a cascade refrigerating system, and accurate fault early warning cannot be achieved, the disclosure provides a fault early warning method, device, equipment and storage medium. In the method, the fault early warning analysis of the high-temperature-level refrigerating system in the cascade refrigerating system is performed through data such as high-temperature-level exhaust pressure, high-temperature-level exhaust temperature and high-temperature-level balance pressure in the cascade refrigerating system, so that the fault type of the high-temperature-level refrigerating system is determined, the fault can be accurately positioned when the high-temperature-level refrigerating system breaks down, the waiting time of temperature rise after the fault in the cascade refrigerating system is shortened, and a user can be reminded of quickly solving the problem in time, for example, samples in a low-temperature preservation box are transferred in time, and sample quality is guaranteed.

In one exemplary embodiment, a fault warning method is provided that may be applied to a refrigeration appliance, such as a cryopreservation box having an overlapping refrigeration system. Referring to fig. 6, the cascade refrigeration system may include a high temperature stage compressor A1, a high temperature stage condenser C, a high temperature stage capillary tube M1, a high temperature stage exhaust gas pressure sensor PH1, a high temperature stage exhaust gas temperature sensor TH1, a high temperature stage suction gas pressure sensor PL1, a high temperature stage suction gas temperature sensor TL1, a low temperature stage compressor A2, a low temperature stage evaporator E, a low temperature stage capillary tube M2, a low temperature stage exhaust gas pressure sensor PH2, a low temperature stage exhaust gas temperature sensor TH2, a low temperature stage suction gas pressure sensor PL2, a low temperature stage suction gas temperature sensor TL2, a condensation evaporator EC, and an intermediate temperature sensor Tm. The intermediate temperature sensor Tm may be disposed at a low-temperature-level refrigerant outlet of the intermediate heat exchanger, and is configured to detect an outlet temperature of the low-temperature-level refrigerant of the intermediate heat exchanger.

Referring to fig. 1 and 6, the method may include:

s110, detecting high-temperature-stage exhaust pressure and high-temperature-stage exhaust temperature of a high-temperature-stage refrigerating system in the cascade refrigerating system;

s120, judging whether a fault exists in the high-temperature-level refrigeration system based on the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature;

And S130, under the condition that the high-temperature-level refrigerating system is determined to have faults, determining the fault type of the high-temperature-level refrigerating system based on the high-temperature-level balance pressure of the high-temperature-level refrigerating system.

In step S110, the cascade refrigeration system may include a high temperature stage refrigeration system and a low temperature stage refrigeration system. The high-temperature-level refrigerating system comprises a high-temperature-level compressor A1, a high-temperature-level capillary tube M1, a high-temperature-level condenser C and an evaporator part in a condensing evaporator EC, wherein a low-temperature-level compressor A2, a low-temperature-level capillary tube M2, a low-temperature-level evaporator E and the condenser part in the condensing evaporator EC are sequentially arranged on a high-temperature-level refrigerant flow path of the high-temperature-level refrigerating system. Also, the heat exchange between the high-temperature-stage refrigeration system and the low-temperature-stage refrigeration system is performed by the condensing evaporator EC, that is, the condensing evaporator EC may also be referred to as an intermediate heat exchanger of the cascade refrigeration system.

Wherein, the high temperature exhaust temperature sensor TH1 and the high temperature exhaust pressure sensor PH1 are distributed on the high temperature compressor A1 air intake and exhaust pipeline. The high-temperature-stage exhaust gas temperature sensor TH1 is used for detecting the high-temperature-stage exhaust gas temperature, and the high-temperature-stage exhaust gas pressure sensor PH1 is used for detecting the high-temperature-stage exhaust gas pressure. That is, in this step, the high-temperature-stage exhaust gas temperature may be detected by the high-temperature-stage exhaust gas temperature sensor TH1, and the high-temperature-stage exhaust gas pressure may be detected by the high-temperature-stage exhaust gas pressure sensor PH1.

The high-temperature-stage exhaust pressure and the high-temperature-stage exhaust temperature may be detected by other means than the above detection, and this is not a limitation.

In step S120, after the high-temperature-stage exhaust pressure and the high-temperature-stage exhaust temperature are detected, fault judgment can be performed on the high-temperature-stage refrigeration system based on the detected data to determine whether the high-temperature-stage refrigeration system has a fault.

The fault determination of the high-temperature-stage refrigeration system can be classified into a fault determination in a start-up stage and a fault determination in an operation stage.

The fault determination in the start-up phase may be based on the high-temperature-stage discharge pressure and the high-temperature-stage discharge temperature for a certain period of time immediately after the high-temperature-stage compressor A1 is started. For example, if the high-temperature-stage discharge pressure and the high-temperature-stage discharge temperature are not increased for a certain period of time after the high-temperature-stage compressor A1 is started, it may be determined that there is a fault in the start-up stage of the high-temperature-stage refrigeration system. It should be noted that the certain time period may be set according to practical situations, and specific numerical values thereof may not be limited.

Wherein, for the fault judgment in the operation phase, after determining that there is no fault in the start-up phase, the judgment may be made based on the high-temperature-stage exhaust pressure and the high-temperature-stage exhaust temperature detected in the operation phase. For example, in the operation stage of the high-temperature-stage compressor A1, if the high-temperature-stage discharge temperature exceeds a certain temperature for a certain period of time under the condition that the ambient temperature and the frequency of the high-temperature-stage compressor A1 are not changed, it may be determined that a fault exists in the operation stage of the high-temperature-stage refrigeration system. It should be noted that the certain time period and the certain temperature may be set according to practical situations, and specific numerical values thereof are not limited.

In addition, in the case of performing the failure determination, it is necessary to use not only the above-described high-temperature-stage exhaust pressure and high-temperature-stage exhaust temperature but also other data in addition to the above-described high-temperature-stage exhaust pressure and high-temperature-stage exhaust temperature, and this is not restrictive.

In step S130, in the case where it is determined that there is a fault in the high-temperature-stage refrigeration system (which may include a fault in the start-up phase and a fault in the operation phase), the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system may be determined first, and then a specific fault type may be determined based on the state of the high-temperature-stage equilibrium pressure.

The fault types may include, but are not limited to, a high temperature stage capillary tube M1 blockage fault, a high temperature stage compressor A1 fault, a high temperature stage refrigerant leakage fault, and other fault types.

In addition, after the fault type is determined, the early warning information corresponding to the fault type can be output. For example, if the fault type is determined to be a high temperature level capillary M1 blockage fault, a high temperature level capillary M1 blockage alarm is output. For another example, if the fault type is determined to be a fault of the high-temperature-stage compressor A1, a fault alarm of the high-temperature-stage compressor A1 is output. For another example, if the fault type is determined to be a high-temperature-level refrigerant leakage fault, a high-temperature-level refrigerant leakage alarm is output.

The warning information may be output in the form of an image, text, or voice, which is not limited thereto.

According to the method, fault early warning analysis of the high-temperature-level refrigerating system in the cascade refrigerating system is carried out through data such as high-temperature-level exhaust pressure, high-temperature-level exhaust temperature and high-temperature-level balance pressure in the cascade refrigerating system, so that the fault type of the high-temperature-level refrigerating system is determined, the fault can be accurately positioned when the high-temperature-level refrigerating system breaks down, the waiting time of temperature rise after the fault in the cascade refrigerating system is shortened, and a user can be reminded of quickly solving the problem in time, for example, samples in a low-temperature preservation box are transferred in time, and sample quality is guaranteed.

In one exemplary embodiment, a fault warning method is provided, which is applicable to a refrigeration device. Referring to fig. 2 and 6, the method may include fault pre-warning for a high temperature stage refrigeration system start-up phase. Wherein the method may comprise:

s210, if a starting signal of a high-temperature-stage compressor of a high-temperature-stage refrigerating system is detected, detecting high-temperature-stage exhaust pressure and high-temperature-stage exhaust temperature;

s220, judging whether the high-temperature-level exhaust temperature and the high-temperature-level exhaust pressure in a first set time period rise from the detection of a starting signal of the high-temperature-level compressor; if the start-up signal of the high-temperature-stage compressor is detected, both the high-temperature-stage exhaust temperature and the high-temperature-stage exhaust pressure within the first set period of time are increased, and then step S230 is entered; if the high-temperature-level exhaust temperature and/or the high-temperature-level exhaust pressure within the first set period of time do not rise from the start-up signal of the high-temperature-level compressor is detected, step S240 is entered;

S230, determining that no fault exists in the starting stage of the high-temperature-level refrigerating system, and ending fault early warning in the starting stage;

s240, determining that a fault exists in the starting stage of the high-temperature-level refrigeration system, and entering step S250;

s250, judging whether the high-temperature-level balance pressure is greater than or equal to the set pressure; if the high-temperature level balance pressure is greater than or equal to the set pressure, the step S260 is entered; if the high-temperature level balance pressure is smaller than the set pressure, the step S270 is performed;

s260, determining that the fault type is a high-temperature-level compressor fault, and entering a step S280;

s270, determining that the fault type is a high-temperature-level refrigerant leakage fault, and entering a step S280;

s280, outputting early warning information corresponding to the determined fault type, and ending fault early warning in the starting stage.

In step S210, the operation of the high-temperature-stage refrigeration system may be divided into a start-up phase and an operation phase, wherein the start-up phase is a process of powering up the high-temperature-stage compressor A1 after power-off, and the high-temperature-stage compressor A1 is restarted. The operation stage is that the suction temperature, the exhaust temperature, the suction pressure, the exhaust pressure, the temperature of the intermediate heat exchanger and the like reach relatively stable values after the high-temperature-stage compressor A1 is started. The temperature of the intermediate heat exchanger refers to the outlet temperature of the low-temperature-level refrigerant of the intermediate heat exchanger.

When the high-temperature-level compressor A1 is powered on, the main control can detect a starting signal of the high-temperature-level compressor A1, and after the high-temperature-level compressor A1 is powered on and started, fault early warning is carried out in a high-temperature-level starting stage. In this case, the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature can be detected, so that fault early warning can be performed.

In step S220, it is determined whether the high-temperature-stage discharge temperature and the high-temperature-stage discharge pressure rise within the first set period of time from the detection of the start-up signal of the high-temperature-stage compressor A1.

If the high-temperature-level exhaust temperature and the high-temperature-level exhaust pressure within the first set period of time are both raised, it is indicated that the high-temperature-level refrigeration system is normally started, and step S230 is entered. If the high temperature level exhaust temperature and/or the high temperature level exhaust pressure within the first set period of time do not rise, it is indicated that the high temperature level refrigeration system is not normally started, and step S240 is entered.

Wherein, the high-temperature-stage exhaust temperature and/or the high-temperature-stage exhaust pressure not rising within the first set period of time may include three cases: first, the high-temperature-stage exhaust temperature in the first set period is not increased, and the high-temperature-stage exhaust pressure in the first set period is increased; secondly, the temperature of the high-temperature-stage exhaust gas in the first set time period rises, and the pressure of the high-temperature-stage exhaust gas in the first set time period does not rise; third, neither the high-temperature-stage exhaust temperature nor the high-temperature-stage exhaust pressure rises within the first set period of time.

The first set duration may be set according to conditions such as the collection frequency of the high-temperature level exhaust pressure sensor PH1, the rotation speed of the high-temperature level compressor A1, and the start speed of the high-temperature level refrigeration system, and the specific numerical value of the first set duration may not be limited. For example, the first set period of time may be greater than 0s and less than or equal to 10.

It should be noted that, when the high-temperature-level refrigeration system is started at a relatively high speed, after the high-temperature-level compressor A1 is started under the condition that the refrigerant does not leak, the high-temperature-level pressure sensor and the high-temperature-level temperature sensor can respectively detect the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature immediately, so that the first set duration can be set to 10s. The first set period of time may be increased or decreased as appropriate for different refrigerant system configurations.

In step S230, since it has been determined that the high-temperature-stage discharge temperature and the high-temperature-stage discharge pressure both rise within the first set period from the detection of the start-up signal of the high-temperature-stage compressor A1, it is indicated that the high-temperature-stage refrigeration system is normally started, and it is determined that no fault exists in the start-up stage of the high-temperature-stage refrigeration system, and the fault early warning in the start-up stage can be ended.

After determining that there is no fault in the start-up phase of the high-temperature-stage refrigeration system, although the fault early warning in the start-up phase is ended, the fault early warning for the operation phase may be started.

In step S240, since it has been determined that the high-temperature-stage discharge temperature and/or the high-temperature-stage discharge pressure have not risen within the first set period of time from the detection of the start-up signal of the high-temperature-stage compressor A1, it is indicated that the high-temperature-stage refrigeration system is not normally started, and it is determined that there is a fault in the start-up phase of the high-temperature-stage refrigeration system. In the case that it is determined that the high-temperature refrigeration system has a fault, step S250 may be performed to further determine the type of the fault existing in the start-up stage, so as to ensure accurate positioning of the fault.

In step S250, in the case where it is determined that there is a fault in the start-up phase of the high-temperature-stage refrigeration system, the high-temperature-stage equilibrium pressure may be determined first, and then a specific fault type may be determined based on the magnitude relation between the high-temperature-stage equilibrium pressure and the set pressure.

The set pressure may be the lowest equilibrium pressure of the high-temperature-level refrigerating system under the condition that the refrigerant is not leaked, and the pressure lower than the lowest equilibrium pressure represents that the refrigerant is leaked. The high-temperature-level refrigerating system operates at the lowest ambient temperature, and when the box temperature reaches the lowest high-temperature-level equilibrium pressure, if the high-temperature-level refrigerating system does not leak refrigerant and the compressor is not started, the corresponding equilibrium pressure is the lowest equilibrium pressure of the high-temperature-level refrigerant system.

In the step, whether the fault type is caused by leakage of the high-temperature-level refrigerant can be determined by judging the relation between the high-temperature-level balance pressure and the set pressure.

In step S260, if it has been determined that the high-temperature-stage balance pressure is greater than or equal to the set pressure, it is indicated that the high-temperature-stage refrigerant is not leaked, and the type of failure at the start-up stage is determined to be a failure of the high-temperature-stage compressor A1, and then the process proceeds to step S280.

In step S270, if it has been determined that the high-temperature-level balance pressure is smaller than the set pressure, it is indicated that the high-temperature-level balance pressure is smaller than the minimum balance pressure of the high-temperature-level refrigeration system, and it is indicated that the high-temperature-level refrigeration system has refrigerant leakage, and it is determined that the fault type is a high-temperature-level refrigerant leakage fault, and the process proceeds to step S280.

In step S280, after determining the fault type in the start-up phase, the early warning information corresponding to the determined fault type may be output. For example, if the fault type is determined to be a high-temperature-level refrigerant leakage fault, a high-temperature-level refrigerant leakage alarm can be output. If the fault type is determined to be the fault of the high-temperature-stage compressor A1, the fault alarm of the high-temperature-stage compressor A1 can be output.

According to the method, fault judgment and fault type determination are carried out on the starting stage of the high-temperature-level refrigerating system through data such as high-temperature-level exhaust pressure, high-temperature-level exhaust temperature and high-temperature-level balance pressure, so that fault early warning on the starting stage of the high-temperature-level refrigerating system is realized, faults can be accurately positioned when the starting stage of the high-temperature-level refrigerating system breaks down, the waiting time of temperature rise after the faults occur in the cascade refrigerating system is shortened, and a user can be reminded of quickly solving the problems in time, for example, samples in a low-temperature preservation box are transferred in time, and sample quality is guaranteed.

In one exemplary embodiment, a fault warning method is provided, which is applicable to a refrigeration device. Referring to fig. 3 and 6, the method may include fault pre-warning for an operational phase of the high temperature stage refrigeration system. In the method, under the condition that no fault exists in the starting stage of the high-temperature-stage refrigeration system, the method comprises the following steps:

s310, detecting the corresponding environment temperature and high-temperature-level compressor frequency of the cascade refrigeration system;

s320, judging whether a fault exists in the operation stage of the high-temperature-level refrigeration system based on the ambient temperature and the high-temperature-level compressor frequency; if it is determined that no fault exists in the operation stage of the high-temperature-stage refrigeration system, returning to the step S310; if it is determined that there is a fault in the operation stage of the high-temperature-stage refrigeration system, step S330 is entered;

s330, controlling the high-temperature-stage compressor to be powered off;

s340, judging whether the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor after power failure reach balance within a fifth set duration;

s350, if the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure after the high-temperature-stage compressor is powered off are not balanced within a fifth set duration, if the difference value between the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure is in a set interval, entering a step S360;

S360, determining that the fault type is a high-temperature-level capillary plug fault, and entering a step S3100;

s370, judging whether the high-temperature-level balance pressure is greater than or equal to the set pressure or not under the condition that the high-temperature-level exhaust pressure and the high-temperature-level suction pressure after the high-temperature-level compressor is powered off reach balance within a fifth set duration; if the high-temperature level balance pressure is greater than or equal to the set pressure, the step S380 is entered; if the high-temperature level balance pressure is less than the set pressure, the step S390 is entered;

s380, determining that the fault type is a high-temperature-level compressor fault, and entering a step S3100;

s390, determining that the fault type is a high-temperature-level refrigerant leakage fault, and proceeding to step S3100;

s3100, outputting early warning information corresponding to the determined fault type.

In step S310, in the case where it is determined that there is no fault in the start-up phase of the high-temperature-stage refrigeration system, the high-temperature refrigeration system may be controlled to enter an operation phase, which may also be referred to as a steady operation phase. And at this stage, fault early warning in the operation stage can be performed.

It should be noted that, when judging whether there is a fault in the operation stage of the high-temperature-stage refrigeration system, it may be generally performed under the condition that it has been determined that there is no fault in the low-temperature-stage refrigeration system and that the low-temperature-stage refrigeration system is not stopped.

The frequency of the high-temperature-stage compressor A1 and the ambient temperature can be continuously detected (denoted as the frequency of the high-temperature-stage compressor A1) to determine whether the ambient temperature and the frequency of the high-temperature-stage compressor A1 change.

In step S320, it may be determined whether there is a fault in the operation phase of the high temperature stage refrigeration system based on the ambient temperature and the variation of the frequency of the high temperature stage compressor A1.

Under the condition that the ambient temperature and the frequency of the high-temperature-stage compressor A1 are not changed, judging whether a first reduction value of the high-temperature-stage exhaust temperature in the second set time period is larger than a first set value or not. If the first drop value is larger than the first set value, determining that a fault exists in the operation stage of the high-temperature-stage refrigeration system.

It should be noted that, because the compressor discharge capacity and the refrigerant filling amount of the refrigeration system are different, the temperature drop rate is different when the abnormality occurs, and the second set time length and the first set value can be tested in a targeted manner according to the experiment to obtain a proper value. The second set duration may be greater than 0s and less than or equal to 20s, and specific values thereof are not limited. For example, the second set period of time may be 10s. The first set value may be 5 ℃ or more and 10 ℃ or less, and specific values thereof are not limited.

And judging whether a second reduction value of the high-temperature-stage exhaust temperature in the third set time period is larger than a second set value under the condition that the ambient temperature is unchanged and the frequency of the high-temperature-stage compressor A1 is increased. And if the second descending value is larger than the second set value, determining that the operation stage of the high-temperature-stage refrigeration system has faults.

It should be noted that, because the compressor discharge capacity and the refrigerant filling amount of the refrigeration system are different, the temperature drop rate is different when the abnormality occurs, and the third set time length and the second set value can be tested in a targeted manner according to the experiment to obtain a proper value. The third set duration may be greater than 0s and less than or equal to 20s, and specific values thereof are not limited. For example, the third set period may be 10s. The second set value may be 5 ℃ or more and 10 ℃ or less, and specific values thereof are not limited.

In addition, the second set duration may be the same as or different from the third set duration. The first setting value and the second setting value may be the same or different. When the second set time period is the same as the third set time period, the second set value may be greater than the first set value. When the first setting value is the same as the second setting value, the second setting time period may be longer than the third setting time period.

Under the condition that the ambient temperature and the frequency of the high-temperature-level compressor A1 are not changed, judging whether the rising value of the low-temperature-level exhaust temperature in the fourth set time period is larger than a third set value or not, and judging whether the temperature of the low-temperature-level refrigerant outlet of the intermediate heat exchanger of the cascade refrigeration system is rising or not. If the rising value is larger than the third set value and the outlet temperature of the low-temperature-level refrigerant rises, determining that a fault exists in the operation stage of the high-temperature-level refrigeration system.

Wherein the low-temperature-stage discharge temperature can be detected by a temperature sensor provided in the low-temperature-stage refrigeration system. The temperature of the low-temperature-level refrigerant outlet of the intermediate heat exchanger can be detected by a temperature sensor arranged at the low-temperature-level refrigerant outlet of the intermediate heat exchanger.

It should be noted that, because the compressor discharge capacity and the refrigerant filling amount selected by the refrigeration system are different, the temperature drop rate is different when the abnormality occurs, and the fourth set time length and the third set value can be tested in a targeted manner according to the experiment to obtain a proper value. The third set value may be greater than or equal to 8 ℃ and less than or equal to 10 ℃, and specific values thereof are not limited.

In addition, the above-described method may be used to determine whether there is a fault in the operation stage of the high-temperature-stage refrigeration system, or other methods may be used to determine the fault, which is not limited.

In this step, if it is determined that there is no fault in the operation stage of the high-temperature-stage refrigeration system, the process returns to step S310, and the ambient temperature and the frequency of the high-temperature-stage compressor A1 are continuously detected, and the change conditions of both are observed. If it is determined that there is a fault in the operation stage of the high-temperature refrigeration system, step S330 may be performed to further determine the fault type, thereby implementing accurate positioning of the fault.

In step S330, in case it is determined that there is a fault in the operation phase of the high temperature stage refrigeration system, the high temperature stage compressor A1 may be controlled to be powered off. Meanwhile, the fault early warning of the high-temperature-level refrigerating system can be output so as to remind related personnel of the fault of the high-temperature-level refrigerating system of the refrigerating equipment.

In step S340, after the high temperature stage compressor A1 is powered off, the high temperature stage discharge pressure and the high temperature stage suction pressure can be continuously detected to determine whether the high temperature stage discharge pressure and the high temperature stage suction pressure can reach equilibrium. The high-temperature-stage exhaust pressure may be detected by the high-temperature-stage exhaust pressure sensor PH1, and the high-temperature-stage intake pressure may be detected by the high-temperature-stage intake pressure sensor PL 1.

When judging whether the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure can reach equilibrium, the judgment can be made by setting the fifth set period. If the high-temperature-level exhaust pressure and the high-temperature-level suction pressure reach balance within the fifth set time period, the high-temperature-level exhaust pressure and the high-temperature-level suction pressure can be considered to reach balance; if the high temperature stage discharge pressure and the high temperature stage suction pressure are not balanced within the fifth set period of time, the high temperature stage discharge pressure and the high temperature stage suction pressure are considered to be not balanced.

It should be noted that, the fifth setting duration may be set according to practical situations, and specific numerical values thereof may not be limited.

In step S350, if the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor A1 after power failure do not reach balance within the fifth set period, a difference between the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure may be determined first, and then it is determined whether the difference is within the set interval. If the difference is determined to be within the set interval, step S360 is performed.

The set section may be determined based on a difference section between the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure at the time of capillary clogging. For example, if the difference between the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure at the time of capillary clogging is generally 8bar or more and 13bar or less, the set section may be set to a pressure section of 8bar or more and 13bar or less.

In step S360, since it has been determined that the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor A1 after the power failure have not reached the equilibrium within the fifth set period, and it is determined that the difference between the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure is within the set interval, it can be said that the fault type of the high-temperature-stage refrigeration system is a high-temperature-stage capillary tube M1 blockage fault.

In step S370, when the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor A1 after the power failure reach equilibrium within the fifth set period, it is indicated that the high-temperature-stage capillary tube M1 should not have a blockage, and the fault type can be further determined based on the magnitude of the high-temperature-stage equilibrium pressure.

The high-temperature-stage equilibrium pressure is the pressure at which the high-temperature-stage discharge pressure and the high-temperature-stage suction pressure reach the equilibrium state.

Regarding the determination of the fault type based on the high-temperature balance pressure and the set pressure in the steps S370 to S390, reference may be made to the steps S250 to S270 in other embodiments, respectively, which will not be described herein.

In step S3100, after determining the fault type of the operation stage, the early warning information corresponding to the determined fault type may be output. For example, if the fault type is determined to be a high-temperature-level refrigerant leakage fault, a high-temperature-level refrigerant leakage alarm can be output. If the fault type is determined to be the fault of the high-temperature-stage compressor A1, the fault alarm of the high-temperature-stage compressor A1 can be output. If the fault type is determined to be the blockage fault of the high-temperature-level capillary tube M1, the blockage alarm of the high-temperature-level capillary tube M1 can be output.

According to the method, fault judgment and fault type determination are carried out on the operation stage of the high-temperature-level refrigerating system through data such as the ambient temperature, the frequency of the high-temperature-level compressor A1, the high-temperature-level exhaust pressure, the high-temperature-level suction pressure, the high-temperature-level exhaust temperature, the low-temperature-level refrigerant outlet temperature of the intermediate heat exchanger and the like, so that fault early warning on the operation stage of the high-temperature-level refrigerating system is realized, faults can be accurately positioned when faults occur in the operation stage of the high-temperature-level refrigerating system, the waiting time of temperature rise after faults occur in the cascade refrigerating system is shortened, and a user can be reminded of quickly solving the problems in time, for example, samples in a low-temperature preservation box are transferred in time, the quality of the samples is guaranteed and the like.

In one exemplary embodiment, a fault warning device is provided, which is applicable to refrigeration equipment. The refrigeration device may be a low-temperature storage box or the like having an cascade refrigeration system, or may be another device having an cascade refrigeration system, and is not limited thereto. The device can be used for implementing the fault early warning method. For example, referring to fig. 4, the apparatus may include a detection module 10 and a determination module 20.

The detection module 10 is used for detecting the high-temperature-level exhaust pressure and the high-temperature-level exhaust temperature of a high-temperature-level refrigeration system in the cascade refrigeration system.

A determination module 20 is configured to determine whether a fault exists in the high temperature stage refrigeration system based on the high temperature stage discharge pressure and the high temperature stage discharge temperature.

The determining module 20 is further configured to determine a fault type of the high-temperature-stage refrigeration system based on the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system in case it is determined that the high-temperature-stage refrigeration system has a fault.

In one exemplary embodiment, a fault warning device is provided, which is applicable to refrigeration equipment. Referring to fig. 4, in the apparatus,

the detection module 10 is configured to detect a high-temperature-stage exhaust pressure and a high-temperature-stage exhaust temperature if a start-up signal of a high-temperature-stage compressor of the high-temperature-stage refrigeration system is detected;

a determination module 20, operable to:

if the starting signal of the high-temperature-level compressor is detected, the high-temperature-level exhaust temperature and/or the high-temperature-level exhaust pressure in the first set time period are/is not increased, and a fault exists in the starting stage of the high-temperature-level refrigeration system; and/or the number of the groups of groups,

if the starting signal of the high-temperature-stage compressor is detected, the high-temperature-stage exhaust temperature and the high-temperature-stage exhaust pressure in the first set time period are both increased, and no fault exists in the starting stage of the high-temperature-stage refrigeration system.

In one exemplary embodiment, a fault warning device is provided, which is applicable to refrigeration equipment. Referring to fig. 4, in the apparatus, the determining module 20 may be configured to:

based on the ambient temperature and the high temperature stage compressor frequency, it is determined whether a fault exists in the operational stage of the high temperature stage refrigeration system.

judging whether the first reduction value of the high-temperature-stage exhaust temperature in the second set time period is larger than a first set value or not under the condition that the ambient temperature and the high-temperature-stage compressor frequency are not changed;

and if the first falling value is larger than the first set value, determining that a fault exists in the operation stage of the high-temperature-stage refrigeration system.

judging whether a second reduction value of the high-temperature-stage exhaust temperature in a third set time period is larger than a second set value under the condition that the ambient temperature is unchanged and the frequency of the high-temperature-stage compressor is increased;

And if the second descending value is larger than the second set value, determining that the operation stage of the high-temperature-stage refrigeration system has faults.

under the condition that the ambient temperature and the frequency of the high-temperature-stage compressor are not changed, judging whether the rising value of the low-temperature-stage exhaust temperature in the fourth set time period is larger than a third set value or not, and judging whether the temperature of the low-temperature-stage refrigerant outlet of the intermediate heat exchanger of the cascade refrigeration system is rising or not;

if the rising value is larger than the third set value and the outlet temperature of the low-temperature-level refrigerant rises, determining that a fault exists in the operation stage of the high-temperature-level refrigeration system.

under the condition that the fault exists in the operation stage of the high-temperature-stage refrigeration system, the high-temperature-stage compressor is controlled to be powered off;

and under the condition that the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor after the power failure are not balanced within a fifth set period, if the difference value of the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure is in a set interval, determining that the fault type is a high-temperature-stage capillary tube blockage fault.

and under the condition that the high-temperature-stage exhaust pressure and the high-temperature-stage suction pressure of the high-temperature-stage compressor after power failure reach balance within a fifth set duration, determining the fault type based on the high-temperature-stage balance pressure.

Wherein the determining module 20 is further operable to:

if the high-temperature-level balance pressure is smaller than the set pressure, determining that the fault type is a high-temperature-level refrigerant leakage fault.

In one exemplary embodiment, a fault warning device is provided, which is applicable to refrigeration equipment. Referring to fig. 4, the apparatus may include an output module 30 that may be used to output pre-warning information corresponding to a fault type after determining the fault type of the high temperature stage refrigeration system.

In one exemplary embodiment, a fault warning device is provided, which is applicable to refrigeration equipment. In the device, the fault type comprises at least one of the following:

the temperature level capillary tube is blocked and fails, the high temperature level compressor is failed, and the high temperature level refrigerant leaks.

In one exemplary embodiment, a refrigeration device is provided. The apparatus may be an apparatus having a cascade refrigeration system in various fields. An cascade refrigeration system may refer to a cascade refrigeration system having both a high temperature level refrigeration system and a low temperature level refrigeration system. For example, the refrigeration device may be a cryopreservation tank with an overlapping refrigeration system.

Referring to fig. 5, the apparatus 100 may include: at least one processor 101, memory 102, at least one network interface 104, and other user interfaces 103. The various components in device 100 are coupled together by bus system 105. It is understood that the bus system 105 is used to enable connected communications between these components. The bus system 105 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration, the various buses are labeled as bus system 105.

The user interface 103 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen, etc.).

It is to be appreciated that the memory 102 in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DRRAM). The memory 102 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some implementations, the memory 102 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 1021, and application programs 1022.

The operating system 1021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs 1022 include various application programs such as a Media Player (Media Player), a Browser (Browser), and the like for implementing various application services. A program for implementing the method of the embodiment of the present application may be included in the application program 1022.

In the embodiment of the present application, the processor 101 is configured to execute the methods provided in the method embodiments by calling a program or an instruction stored in the memory 102, specifically, a program or an instruction stored in the application 1022.

The method disclosed in the embodiments of the present application may be applied to the processor 101 or implemented by the processor 101. The processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 101 or instructions in the form of software. The processor 101 described above may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software elements in a decoded processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102, and in combination with its hardware, performs the above method.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (dspev, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented by means of units that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The embodiment of the application also provides a storage medium (computer readable storage medium). The storage medium here stores one or at least one program. Wherein the storage medium may comprise volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid state disk; the memory may also comprise a combination of the above types of memories.

When the one or more programs are executed by the one or more processors in the storage medium. Wherein the method performed at the device as described above may be implemented when the storage medium is applied to the device. The processor is configured to execute a control program of the device stored in the memory, to implement the method of executing in the device described above.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It should be noted that references in the specification to "one implementation," "an embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In the absence of further limits, an element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

The above embodiments are merely preferred embodiments for the purpose of fully explaining the present application, and the scope of the present application is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present application, and are intended to be within the scope of the present application.

Claims

1. The fault early-warning method is characterized by comprising the following steps of:

under the condition that the high-temperature-level refrigerating system is determined to have faults, determining the fault type of the high-temperature-level refrigerating system based on the high-temperature-level balance pressure of the high-temperature-level refrigerating system;

judging whether a fault exists in the operation stage of the high-temperature-stage refrigeration system based on the environment temperature and the high-temperature-stage compressor frequency;

the determining whether a fault exists in an operation stage of the high-temperature-stage refrigeration system based on the ambient temperature and the high-temperature-stage compressor frequency includes:

2. The fault pre-warning method according to claim 1, characterized in that,

3. The fault early warning method according to claim 1, wherein the determining whether there is a fault in an operation stage of the high-temperature stage refrigeration system based on the ambient temperature and the high-temperature stage compressor frequency includes:

4. The fault early warning method according to claim 1, wherein the determining whether there is a fault in an operation stage of the high-temperature stage refrigeration system based on the ambient temperature and the high-temperature stage compressor frequency includes:

5. The fault early-warning method according to claim 1, wherein the determining the fault type of the high-temperature-stage refrigeration system based on the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system in the case where it is determined that the high-temperature-stage refrigeration system has a fault, comprises:

6. The fault early-warning method according to claim 1, wherein the determining the fault type of the high-temperature-stage refrigeration system based on the high-temperature-stage equilibrium pressure of the high-temperature-stage refrigeration system in the case where it is determined that the high-temperature-stage refrigeration system has a fault, comprises:

7. The fault alerting method of claim 6, wherein,

determining the fault type based on the high-temperature-level balance pressure under the condition that the high-temperature-level exhaust pressure and the high-temperature-level suction pressure after the high-temperature-level compressor is powered off reach balance within the fifth set time period;

8. The fault pre-warning method according to any one of claims 1 to 7, wherein after the determining of the fault type of the high temperature stage refrigeration system, the fault pre-warning method comprises:

and outputting early warning information corresponding to the fault type.

9. The fault pre-warning method according to any one of claims 1 to 7, characterized in that the fault type comprises at least one of the following:

10. A fault early warning device, characterized in that the fault early warning device comprises:

the determining module is further used for determining the fault type of the high-temperature-level refrigerating system based on the high-temperature-level balance pressure of the high-temperature-level refrigerating system under the condition that the high-temperature-level refrigerating system is determined to have faults;

wherein, based on the high-temperature-stage discharge pressure and the high-temperature-stage discharge temperature, judging whether the high-temperature-stage refrigeration system has a fault or not includes:

11. A refrigeration appliance, the refrigeration appliance comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to perform the fault pre-warning method of any one of claims 1-9.

12. A non-transitory computer readable storage medium, wherein instructions in the storage medium, when executed by a processor of a refrigeration device, enable the refrigeration device to perform the fault pre-warning method of any one of claims 1-9.