CN112177883A - Refrigeration system detection method, device and readable medium - Google Patents

Refrigeration system detection method, device and readable medium Download PDF

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Publication number
CN112177883A
CN112177883A CN202010912223.0A CN202010912223A CN112177883A CN 112177883 A CN112177883 A CN 112177883A CN 202010912223 A CN202010912223 A CN 202010912223A CN 112177883 A CN112177883 A CN 112177883A
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current
refrigeration system
refrigerant
detected
operating frequency
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CN112177883B (en
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朱绯
高向军
唐婷婷
王声纲
任艳华
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Sichuan Hongmei Intelligent Technology Co Ltd
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Sichuan Hongmei Intelligent Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a detection method, a device and a readable medium for a refrigeration system, wherein the method comprises the following steps: pre-storing a corresponding relation between the machine type of the variable frequency compressor and a functional relation, wherein the functional relation comprises: the method comprises the following steps of (1) operating frequency and load current of the variable frequency compressor, temperature of an evaporator in a refrigeration system where the variable frequency compressor is located and standard quantity of a refrigerant; acquiring the current operating frequency and the current load current of a target variable frequency compressor in the refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected and the standard quantity of a refrigerant; determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation; and determining whether the refrigerant in the refrigeration system to be detected leaks or not according to the target function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected. The scheme can more conveniently detect whether the refrigerant in the refrigeration system leaks.

Description

Refrigeration system detection method, device and readable medium
Technical Field
The invention relates to the technical field of household appliances, in particular to a method and a device for detecting a refrigerating system and a readable medium.
Background
The compressor is the heart of a refrigerating system, and the working conditions of an air conditioner, a refrigerator, a cold storage, a chemical refrigeration process and the like are all ensured by the important link of the compressor. The compressor needs to compress the refrigerant to lower the temperature of the evaporator so as to realize refrigeration, so the refrigerant is a necessary condition for the normal operation of the compressor. However, the leakage of the refrigerant may be caused by the influence of external force, the vibration of equipment, the breakage of a sealing or even a pipeline and the like during the operation of the compressor, and the leakage of the refrigerant not only influences the refrigeration and heating level of the compressor and damages the compressor, but also has great potential safety hazard.
The Chinese patent application with the application number of 201910359190.9 discloses a refrigerant leakage detection method and system for an air conditioner and the air conditioner, wherein an exhaust temperature threshold value and a system pressure threshold value are determined by obtaining operation parameters of the air conditioner, real-time exhaust temperature and system pressure are obtained, and whether the refrigerant of the air conditioner leaks or not is judged by comparing the real-time exhaust temperature and the real-time system pressure with the exhaust temperature threshold value and the system pressure threshold value respectively.
The existing refrigerant leakage detection method needs to add an additional sensor to obtain system pressure and the like, and is complex.
Disclosure of Invention
The invention provides a method, a device and a readable medium for detecting a refrigeration system, which can more conveniently detect whether a refrigerant in the refrigeration system leaks.
In a first aspect, an embodiment of the present invention provides a refrigeration system detection method, including:
the method comprises the following steps of pre-storing a corresponding relation between the machine type of the variable frequency compressor and a functional relation, wherein the functional relation comprises the following steps: the operation frequency of the variable frequency compressor, the temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, the load current of the variable frequency compressor and the standard amount of a refrigerant in the refrigeration system where the variable frequency compressor is located;
further comprising:
acquiring the current operating frequency of a target variable frequency compressor in a refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of a refrigerant in the refrigeration system to be detected;
determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation;
and determining whether the refrigerant in the refrigeration system to be detected leaks or not according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected.
Optionally, the functional relationship corresponding to the model of the ith inverter compressor includes:
Figure BDA0002663730960000021
the variable frequency compressor comprises a variable frequency compressor, a condenser and a condenser, wherein f is used for representing the operating frequency of the variable frequency compressor, I is used for representing the load currentiA first coefficient corresponding to the model of the ith variable frequency compressor, biAnd the second coefficient is used for representing the second coefficient corresponding to the model of the ith variable frequency compressor.
Optionally, the determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected includes:
calculating a first operating frequency according to the objective function relation, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a first threshold value according to the current operating frequency;
judging whether the first operating frequency meets the following conditions: and the first operating frequency is less than the current operating frequency, the absolute value of the difference value between the first operating frequency and the current operating frequency is greater than the first threshold value, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
Optionally, the method further comprises:
when the first operating frequency is greater than the current operating frequency and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than the first threshold, determining that a pipeline in the refrigeration system to be detected is blocked;
and when the absolute value of the difference value between the first operating frequency and the current operating frequency is smaller than or equal to the first threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
Optionally, the determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected further includes:
calculating a first load current according to the objective function relation, the current operating frequency, the current temperature and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a second threshold value according to the current load current;
judging whether the first load current meets the following conditions: and the first load current is smaller than the current load current, the absolute value of the difference value between the first load current and the current load current is larger than the second threshold value, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
Optionally, the determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected further includes:
calculating a first refrigerant quantity of the refrigerant in the refrigeration system to be detected according to the objective function relation, the current operation frequency, the current temperature and the current load current;
determining a third threshold value according to the standard quantity of the refrigerant in the refrigeration system to be detected;
determining whether the first amount of refrigerant satisfies: and the first refrigerant quantity is smaller than the standard quantity of the refrigerant in the refrigerating system to be detected, the absolute value of the difference value between the first refrigerant quantity and the standard quantity of the refrigerant in the refrigerating system to be detected is larger than the third threshold value, and if the absolute value is larger than the third threshold value, the refrigerant leakage in the refrigerating system to be detected is determined.
Optionally, the determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected further includes:
calculating a first temperature of a target evaporator in the refrigeration system to be detected according to the target function relation, the current operation frequency, the current load current and a standard quantity of a refrigerant in the refrigeration system to be detected;
determining a fourth threshold value according to the current temperature;
judging whether the first temperature meets the following conditions: and the first temperature is greater than the current temperature, the absolute value of the difference between the first temperature and the current temperature is greater than the fourth threshold, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
In a second aspect, an embodiment of the present invention further provides a detection device for a refrigeration system, including: the device comprises a storage module, an acquisition module, a first determination module and a second determination module;
the storage module is used for storing the corresponding relation between the model of the inverter compressor and the functional relation, wherein the functional relation comprises: the operation frequency of the variable frequency compressor, the temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, the load current of the variable frequency compressor and the standard amount of a refrigerant in the refrigeration system where the variable frequency compressor is located;
the acquisition module is used for acquiring the current operating frequency of a target variable frequency compressor in the refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of refrigerant in the refrigeration system to be detected;
the first determining module is used for determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation stored in the storage module;
the second determining module is configured to determine whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship determined by the first determining module, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected, which are obtained by the obtaining module.
In a third aspect, an embodiment of the present invention further provides a detection device for a refrigeration system, including: at least one memory and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor is configured to invoke the machine readable program to perform the refrigeration system detection method provided in the first aspect or any of the possible implementation manners of the first aspect.
In a fourth aspect, the present invention further provides a computer readable medium having stored thereon computer instructions, which, when executed by a processor, cause the processor to execute the method for detecting a refrigeration system provided in the first aspect or any of the possible implementations of the first aspect.
The refrigeration system detection method, the device and the readable medium provided by the embodiment of the invention pre-store the corresponding relation between the machine type of the inverter compressor and the functional relation, and determine the target functional relation corresponding to the target inverter compressor from the corresponding relation after acquiring the current operating frequency and the current load current of the target inverter compressor in the refrigeration system to be detected, the current temperature of the target evaporator and the standard quantity of the refrigerant in the refrigeration system to be detected, so as to determine whether the refrigeration system to be detected has refrigerant leakage according to the target functional relation and the current parameters. Therefore, the variable frequency compressors of different models have different functional relationships correspondingly, whether the refrigerant in the refrigeration system leaks can be determined according to the corresponding functional relationships and the current parameters such as the current frequency and the like in the refrigeration system, the current parameters are detected by the original built-in sensor in the refrigeration system, the required parameters are obtained without additionally arranging a sensor, and therefore whether the refrigerant in the refrigeration system leaks can be detected more conveniently.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method of refrigerant system detection provided by one embodiment of the present invention;
FIG. 2 is a flow chart of another refrigerant system test method provided by one embodiment of the present invention;
FIG. 3 is a schematic diagram of a device in which a detection device of a refrigeration system is located according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a detection device of a refrigeration system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a refrigeration system detection method, which may include the steps of:
step 101: the method comprises the following steps of pre-storing the corresponding relation between the machine type of the variable frequency compressor and the functional relation, wherein the functional relation comprises the following steps: the method comprises the following steps of (1) operating frequency of the variable frequency compressor, temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, load current of the variable frequency compressor and standard quantity of refrigerant in the refrigeration system where the variable frequency compressor is located;
step 102: acquiring the current operating frequency of a target variable frequency compressor in the refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of a refrigerant in the refrigeration system to be detected;
step 103: determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation;
step 104: and determining whether the refrigerant in the refrigeration system to be detected leaks or not according to the target function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected.
The method for detecting the refrigeration system provided by the embodiment of the invention is characterized in that the corresponding relation between the machine type of the variable frequency compressor and the function relation is preserved in advance, after the current operating frequency and the current load current of the target variable frequency compressor in the refrigeration system to be detected, the current temperature of the target evaporator and the standard quantity of the refrigerant in the refrigeration system to be detected are obtained, the target function relation corresponding to the target variable frequency compressor is determined from the corresponding relation, and whether the refrigeration system to be detected leaks the refrigerant or not is determined according to the target function relation and the current parameters. Therefore, the variable frequency compressors of different models have different functional relationships correspondingly, whether the refrigerant in the refrigeration system leaks can be determined according to the corresponding functional relationships and the current parameters such as the current frequency and the like in the refrigeration system, the current parameters are detected by the original built-in sensor in the refrigeration system, the required parameters are obtained without additionally arranging a sensor, and therefore whether the refrigerant in the refrigeration system leaks can be detected more conveniently.
In the embodiment of the present invention, the inverter compressor may be applied to an inverter air conditioner, an inverter refrigerator, and the like.
In an embodiment of the present invention, the current operating frequency may be a measured actual operating frequency of the target inverter compressor, the current temperature may be a measured actual temperature of the target evaporator, and the current load current may be a measured actual load current of the target inverter compressor.
In the embodiment of the invention, the operation load of the variable frequency compressor is changed after the refrigerant in the refrigeration system leaks, the load of the variable frequency compressor is mainly in direct relation with the operation frequency of the variable frequency compressor, the temperature of an evaporator in the refrigeration system, the amount of the refrigerant in the refrigeration system and the type of the refrigerant, the type of the refrigerant of each type of variable frequency compressor is determined, and the operation frequency, the load current and the temperature of the evaporator in the refrigeration system of the variable frequency compressor can be directly detected and obtained by the refrigeration system except that the amount of the refrigerant can not be directly obtained.
In the embodiment of the invention, the standard quantity of the refrigerant in the refrigerating system where the variable frequency compressor is located can be obtained by a nameplate mark of the refrigerating system, and can be directly obtained according to the model of the variable frequency compressor and the type of the refrigerant.
In the embodiment of the invention, the current operating frequency of the target variable frequency compressor in the refrigeration system to be detected, the current temperature of the target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of the refrigerant in the refrigeration system to be detected are obtained, and the parameters can be obtained regularly according to the preset period to detect the refrigeration system, so that the normal operation of the refrigeration system to be detected is ensured in real time, and the reliability and the safety of the refrigeration system are improved.
Optionally, in the detection method of the refrigeration system shown in fig. 1, the functional relationship corresponding to the model of the i-th inverter compressor includes:
Figure BDA0002663730960000081
wherein, f is used for representing the running frequency of the variable frequency compressor, I is used for representing the load current of the variable frequency compressor, T is used for representing the temperature of an evaporator in a refrigerating system in which the variable frequency compressor is arranged, L is used for representing the standard quantity of a refrigerant in the refrigerating system in which the variable frequency compressor is arranged, and aiA first coefficient corresponding to the model of the ith variable frequency compressor, biAnd the second coefficient is used for representing the second coefficient corresponding to the model of the ith variable frequency compressor.
In the embodiment of the present invention, the correspondence between the model of the inverter compressor and the functional relationship may be obtained by: firstly, a plurality of variable frequency compressors of different models are selected, and a plurality of groups of parameter data of the variable frequency compressors when the refrigerant does not leak are obtained aiming at each variable frequency compressor, wherein the parameter data comprise: the operation frequency and the load current of the variable frequency compressor, the evaporator temperature in the refrigeration system where the variable frequency compressor is located and the standard quantity of the refrigerant are processed through induction, data fitting and the like on parameter data of each variable frequency compressor to obtain a functional relation related to the type of the variable frequency compressor, different types of the variable frequency compressors correspond to different functional relations, and therefore the functional relation is suitable for various variable frequency compressors.
For example, the variable frequency compressors of the type a, the type B and the type C are selected, 100 sets of parameter data (300 sets of parameter data in total) of the operation of the refrigeration system when the refrigerant is not leaked are respectively obtained by the variable frequency compressors of the type a, the type B and the type C, and each set of parameter data includes: f. i, T and L, and obtaining functional relations of f, I, T and L and the model of the inverter compressor by processing the 300 sets of parameter data such as induction and data fitting
Figure BDA0002663730960000082
In the examples of the present invention, aiAnd biA first coefficient and a second coefficient corresponding to models of different frequency conversion compressors, wherein aiAnd biThe method can be obtained by calculation by using the formula, at least two groups of acquired parameter data aiming at each variable frequency compressor are input into the functional relation, each group of parameter data comprises the operating frequency f of the variable frequency compressor, the evaporator temperature T in the refrigeration system where the variable frequency compressor is located, the load current I of the variable frequency compressor and the standard quantity L of the refrigerant in the refrigeration system where the variable frequency compressor is located, and a is calculated by using methods (but not limited to the methods) such as a least square method, a plotting point method, a binary equation solving method and the likeiAnd biAnd the more parameter data sets are input, the more aiAnd biThe more accurate the value of (c).
For example, as described in the previous example, four sets of parameter data are obtained from 100 sets of parameter data of the a model inverter compressor, wherein,
a first group: l ═ 1kg, f ═ 70Hz, I ═ 6.2A, T ═ 35 ℃;
second group: l ═ 1kg, f ═ 70Hz, I ═ 6.9A, T ═ 40 ℃;
third group: l ═ 1kg, f ═ 70Hz, I ═ 5.6A, T ═ 30 ℃;
and a fourth group: l ═ 1kg, f ═ 50Hz, I ═ 5.3A, T ═ 35 ℃;
inputting the four groups of parameter dataTo the above functional relationship, calculate ai0.015 and bi15, determining that the model of the A-type variable frequency compressor corresponds to the objective function relationship as follows:
Figure BDA0002663730960000091
in an embodiment of the present invention, whether the refrigerant in the refrigeration system leaks can be detected by the following several ways:
the first method is as follows:
optionally, in the method for detecting a refrigeration system shown in fig. 1, the step 104 determines whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard amount of the refrigerant in the refrigeration system to be detected, and includes the following steps:
s1: calculating a first operating frequency according to the target function relation, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
s2: determining a first threshold value according to the current operating frequency;
s3: judging whether the first operating frequency meets the following conditions: the first operating frequency is less than the current operating frequency, and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than a first threshold, if yes, it is determined that the refrigerant in the refrigeration system to be detected is leaked.
The specific mode is as follows:
inputting the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected into an objective function relation by taking the operation frequency as an unknown quantity so as to calculate a first operation frequency, and determining a first threshold value according to the current operation frequency, for example: the first threshold is 10% or 15% of the current operating frequency, etc.
The above calculation of the first operating frequency may be performed by a processing chip, for example: the processing chip can be a control chip in the variable frequency compressor. The efficiency of the processing chip in calculating the root opening number is low, so that the embodiment of the invention detects whether the refrigerant leaks by calculating the operating frequency, the root opening number is not needed in the calculation process, and the processing efficiency of the processing chip can be improved.
For example, the current frequency of the a-type inverter compressor in the refrigeration system to be detected is 70Hz, the current temperature of the target evaporator in the refrigeration system to be detected is 38 ℃, the current load current of the a-type inverter compressor is 4.5A, and the standard quantity of the refrigerant in the refrigeration system to be detected is 1kg, and as described in the previous example, the current temperature of 38 ℃, the current load current of 4.5A, and the standard quantity of the refrigerant in the refrigeration system to be detected, which is 1kg, are input into the target function relationship
Figure BDA0002663730960000101
Calculating that the first operating frequency is 32Hz, determining that the first threshold is 10% of the current operating frequency according to the current operating frequency of 70Hz, and determining that the first operating frequency meets the following conditions: and if the first operating frequency 32Hz is less than the current operating frequency 70Hz and the absolute value (38) of the difference between the first operating frequency and the current operating frequency is greater than a first threshold value (7), determining the refrigerant leakage in the refrigeration system to be detected, and sending out a first alarm signal for prompting a user of the refrigerant leakage of the refrigeration system so that the user can take corresponding measures in time.
Alternatively, in the detection method of the refrigeration system shown in fig. 1, in determining whether the first operating frequency satisfies: after the first operating frequency is less than the current operating frequency and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than the first threshold, the method further comprises:
when the first operating frequency is greater than the current operating frequency and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than a first threshold value, determining that a pipeline in the refrigeration system to be detected is blocked;
and when the absolute value of the difference value between the first operating frequency and the current operating frequency is less than or equal to a first threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
For example, obtaining the A type frequency conversion compressor in the refrigeration system to be detectedThe front frequency is 70Hz, the current temperature of a target evaporator in the refrigerating system to be detected is 22 ℃, the current load current of the A-type frequency conversion compressor is 6.5A, and the standard quantity of the refrigerant in the refrigerating system to be detected is 1kg, and as described in the previous example, the current temperature of 22 ℃, the current load current of 6.5A and the standard quantity of the refrigerant in the refrigerating system to be detected is input into the target function relation
Figure BDA0002663730960000111
And calculating that the first operating frequency is 137Hz, determining that the first threshold is 10% of the current operating frequency according to the current operating frequency of 70Hz, and then determining that the first operating frequency meets the following requirements: and if the first operation frequency 137Hz is greater than the current operation frequency 70Hz and the absolute value (67) of the difference value between the first operation frequency and the current operation frequency is greater than a first threshold value (7), determining that the pipeline in the refrigeration system to be detected is blocked, and sending a second alarm signal for prompting a user that the pipeline of the refrigeration system is blocked so that the user can take corresponding measures in time.
For example, the current frequency of the a-type inverter compressor in the refrigeration system to be detected is 70Hz, the current temperature of the target evaporator in the refrigeration system to be detected is 37 ℃, the current load current of the a-type inverter compressor is 6.3A, and the standard quantity of the refrigerant in the refrigeration system to be detected is 1kg, and as described in the previous example, the current temperature of 37 ℃, the current load current of 6.3A, and the standard quantity of the refrigerant in the refrigeration system to be detected, which is 1kg, are input into the target function relationship
Figure BDA0002663730960000112
Calculating that the first operating frequency is 65Hz, determining that the first threshold is 10% of the current operating frequency according to the current operating frequency of 70Hz, and determining that the first operating frequency meets the following conditions: and if the absolute value (5) of the difference value between the first operation frequency 65Hz and the current operation frequency 70Hz is less than the first threshold value (7), determining that the refrigerant in the refrigeration system to be detected does not leak.
In the embodiment of the invention, according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, whether the refrigerant of the refrigeration system to be detected leaks or not can be determined, and the pipeline blockage of the refrigeration system to be detected can also be determined, so that the reliability of the detection method of the refrigeration system is further improved.
The second method comprises the following steps:
optionally, in the refrigeration system detection method shown in fig. 1, the step 104 determines whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard amount of the refrigerant in the refrigeration system to be detected, and may further include the following steps:
b1: calculating a first load current according to the objective function relation, the current operating frequency, the current temperature and the standard quantity of the refrigerant in the refrigeration system to be detected;
b2: determining a second threshold value according to the current load current;
b3: judging whether the first load current meets the following conditions: the first load current is smaller than the current load current, the absolute value of the difference value between the first load current and the current load current is larger than a second threshold value, and if yes, the refrigerant leakage in the refrigeration system to be detected is determined.
In the embodiment of the present invention, the load current is used as an unknown quantity, the current operating frequency, the current temperature and the standard quantity of the refrigerant in the refrigeration system to be detected are input into the objective function relationship, the first load current is calculated, and the second threshold is determined according to the current load current, for example: the second threshold is 8% or 10% of the current load current, and the like, and whether the first load current meets the following conditions is judged: the first load current is smaller than the current load current, and the absolute value of the difference between the first load current and the current load current is larger than a second threshold value, if yes, the refrigerant leakage in the refrigeration system to be detected is determined, and a first alarm signal is sent out for prompting a user of the refrigerant leakage of the refrigeration system so that the user can take corresponding measures in time; if the first load current is larger than the current load current and the absolute value of the difference value between the first load current and the current load current is larger than a second threshold value, determining that a pipeline in the refrigeration system to be detected is blocked, and sending a second alarm signal for prompting a user that the pipeline of the refrigeration system is blocked so that the user can take corresponding measures in time; and if the absolute value of the difference value between the first load current and the current load current is less than or equal to the second threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
The third method comprises the following steps:
optionally, in the refrigeration system detection method shown in fig. 1, the step 104 determines whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard amount of the refrigerant in the refrigeration system to be detected, and may further include the following steps:
c1: calculating a first refrigerant quantity of a refrigerant in the refrigeration system to be detected according to the target function relation, the current operating frequency, the current temperature and the current load current;
c2: determining a third threshold value according to the standard quantity of the refrigerant in the refrigeration system to be detected;
c3: judging whether the first refrigerant quantity meets the following conditions: and if so, determining that the refrigerant in the refrigeration system to be detected leaks.
In the embodiment of the present invention, the current actual refrigerant quantity is used as an unknown quantity, the current operating frequency, the current temperature and the current load current are input into the objective function relationship, the first refrigerant quantity of the refrigerant in the refrigeration system to be detected is calculated, and a third threshold value is determined according to the standard quantity of the refrigerant in the refrigeration system to be detected, for example: the third threshold value is 5% or 10% of the standard amount of the refrigerant, and whether the first refrigerant amount satisfies: the first refrigerant quantity is smaller than the standard quantity of the refrigerant in the refrigerating system to be detected, and the absolute value of the difference between the first refrigerant quantity and the standard quantity of the refrigerant in the refrigerating system to be detected is larger than a third threshold value; if the first refrigerant quantity is larger than the standard quantity of the refrigerant in the refrigerating system to be detected, and the absolute value of the difference value between the first refrigerant quantity and the standard quantity of the refrigerant in the refrigerating system to be detected is larger than a third threshold value, determining that the pipeline in the refrigerating system to be detected is blocked, and sending a second alarm signal for prompting a user that the pipeline of the refrigerating system is blocked so that the user can take corresponding measures in time; and if the absolute value of the difference value between the first refrigerant quantity and the standard quantity of the refrigerant in the refrigeration system to be detected is smaller than or equal to the second threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
The method is as follows:
optionally, in the refrigeration system detection method shown in fig. 1, the step 104 determines whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current, and the standard amount of the refrigerant in the refrigeration system to be detected, and may further include the following steps:
d1: calculating a first temperature of a target evaporator in the refrigeration system to be detected according to the target function relation, the current operating frequency, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
d2: determining a fourth threshold value according to the current temperature;
d3: judging whether the first temperature meets the following conditions: the first temperature is greater than the current temperature, and an absolute value of a difference between the first temperature and the current temperature is greater than a fourth threshold, and if so, it is determined that refrigerant leakage in the refrigeration system to be detected occurs.
In the embodiment of the present invention, the temperature of the evaporator is used as an unknown quantity, the current operating frequency, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected are input into the objective function relationship, the first temperature of the target evaporator in the refrigeration system to be detected is calculated, and the fourth threshold is determined according to the current temperature, for example: the fourth threshold is 10% or 20% of the current temperature, and the like, and whether the first temperature meets the following conditions is judged: the first temperature is higher than the current temperature, and the absolute value of the difference between the first temperature and the current temperature is higher than a fourth threshold value, if yes, the refrigerant leakage in the refrigeration system to be detected is determined, and a first alarm signal is sent out for prompting a user of the refrigerant leakage of the refrigeration system so that the user can take corresponding measures in time; if the first temperature is lower than the current temperature and the absolute value of the difference between the first temperature and the current temperature is higher than a fourth threshold, determining that a pipeline in the refrigeration system to be detected is blocked, and sending a second alarm signal for prompting a user that the pipeline of the refrigeration system is blocked so that the user can take corresponding measures in time; and if the absolute value of the difference value between the first temperature and the current temperature is less than or equal to the fourth threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
In order to more clearly illustrate the technical solution and advantages of the present invention, as shown in fig. 2, the following detailed description of the detection method of the refrigeration system provided by the embodiment of the present invention specifically includes:
step 201: and pre-storing the corresponding relation between the machine type of the variable frequency compressor and the functional relation.
Specifically, the functional relationship includes: the method comprises the following steps of operating frequency of the variable frequency compressor, temperature of an evaporator in a refrigerating system where the variable frequency compressor is located, load current of the variable frequency compressor and standard quantity of refrigerant in the refrigerating system where the variable frequency compressor is located.
Step 202: the method comprises the steps of obtaining the current operation frequency of a target variable frequency compressor in the refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of refrigerant in the refrigeration system to be detected.
Specifically, the parameter may be obtained periodically according to a preset period to perform real-time detection on the refrigeration system.
Step 203: and determining a target function relation corresponding to the model of the target variable frequency compressor according to the corresponding relation.
Specifically, the functional relationship corresponding to the model of the ith inverter compressor includes:
Figure BDA0002663730960000151
wherein, f is used for representing the running frequency of the variable frequency compressor, I is used for representing the load current of the variable frequency compressor, T is used for representing the temperature of an evaporator in a refrigerating system in which the variable frequency compressor is arranged, L is used for representing the standard quantity of a refrigerant in the refrigerating system in which the variable frequency compressor is arranged, and aiA first coefficient corresponding to the model of the ith variable frequency compressor, biAnd the second coefficient is used for representing the second coefficient corresponding to the model of the ith variable frequency compressor.
Step 204: and calculating the first operating frequency according to the target function relation, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected.
Specifically, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected are input into the objective function relationship to calculate the first operating frequency.
Step 205: a first threshold is determined based on the current operating frequency.
Specifically, the first threshold may be 10% or 15% of the current operating frequency, or the like.
Step 206: and judging whether the absolute value of the difference value between the first operating frequency and the current operating frequency is greater than a first threshold value, if so, executing step 207, otherwise, executing step 210.
Step 207: and judging whether the first operating frequency is less than the current operating frequency, if so, executing step 208, otherwise, executing step 209.
Step 208: a refrigerant leak in the refrigerant system to be tested is determined.
Specifically, when the refrigerant leakage in the refrigeration system to be detected is determined, a first alarm signal is sent out for prompting a user of the refrigerant leakage of the refrigeration system so that the user can take corresponding measures in time.
Step 209: a line blockage in the refrigerant system to be tested is determined.
Specifically, when the pipeline blockage in the refrigeration system to be detected is determined, a first alarm signal is sent out and used for prompting a user that the pipeline of the refrigeration system is blocked so that the user can take corresponding measures in time.
Step 210: it is determined that the refrigerant in the refrigeration system to be tested is not leaking.
As shown in fig. 3 and 4, the embodiment of the invention provides a detection device for a refrigeration system. The device embodiments may be implemented by software, or by hardware, or by a combination of hardware and software. From a hardware level, as shown in fig. 3, a hardware structure diagram of a device in which a refrigeration system detection apparatus according to an embodiment of the present invention is located is provided, where in addition to the processor, the memory, the network interface, and the nonvolatile memory shown in fig. 3, the device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing a packet, in general. Taking a software implementation as an example, as shown in fig. 4, as a logical apparatus, the apparatus is formed by reading a corresponding computer program instruction in a non-volatile memory into a memory by a CPU of a device in which the apparatus is located and running the computer program instruction. The refrigerating system that this embodiment provided detects the device includes: a storage module 401, an acquisition module 402, a first determination module 403 and a second determination module 404;
the storage module 401 is configured to store a correspondence between a model of the inverter compressor and a functional relationship, where the functional relationship includes: the method comprises the following steps of (1) operating frequency of the variable frequency compressor, temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, load current of the variable frequency compressor and standard quantity of refrigerant in the refrigeration system where the variable frequency compressor is located;
an obtaining module 402, configured to obtain a current operating frequency of a target variable frequency compressor in a refrigeration system to be detected, a current temperature of a target evaporator in the refrigeration system to be detected, a current load current of the target variable frequency compressor, and a standard amount of a refrigerant in the refrigeration system to be detected;
a first determining module 403, configured to determine, according to the correspondence stored in the storage module 401, an objective function relationship corresponding to the model of the target inverter compressor;
a second determining module 404, configured to determine whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship determined by the first determining module 403, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected, which are obtained by the obtaining module 402.
In the embodiment of the present invention, the storage module 401 stores a function relationship corresponding to the model of the i-th inverter compressor, which includes:
Figure BDA0002663730960000171
wherein, f is used for representing the running frequency of the variable frequency compressor, I is used for representing the load current of the variable frequency compressor, T is used for representing the temperature of an evaporator in a refrigerating system in which the variable frequency compressor is arranged, L is used for representing the standard quantity of a refrigerant in the refrigerating system in which the variable frequency compressor is arranged, and aiA first coefficient corresponding to the model of the ith variable frequency compressor, biAnd the second coefficient is used for representing the second coefficient corresponding to the model of the ith variable frequency compressor.
In one embodiment of the invention, the second determining module 404 is configured to perform the following operations:
calculating a first operating frequency according to the target function relation, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a first threshold value according to the current operating frequency;
judging whether the first operating frequency meets the following conditions: the first operation frequency is smaller than the current operation frequency, the absolute value of the difference between the first operation frequency and the current operation frequency is larger than a first threshold value, and if yes, the refrigerant leakage in the refrigeration system to be detected is determined;
if the first operating frequency is greater than the current operating frequency and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than a first threshold, determining that a pipeline in the refrigeration system to be detected is blocked;
and if the absolute value of the difference between the first operating frequency and the current operating frequency is less than or equal to a first threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
In one embodiment of the invention, the second determining module 404 is configured to perform the following operations:
calculating a first load current according to the objective function relation, the current operating frequency, the current temperature and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a second threshold value according to the current load current;
judging whether the first load current meets the following conditions: the first load current is smaller than the current load current, the absolute value of the difference value between the first load current and the current load current is larger than a second threshold value, and if yes, the refrigerant leakage in the refrigeration system to be detected is determined.
In one embodiment of the invention, the second determining module 404 is configured to perform the following operations:
calculating a first refrigerant quantity of a refrigerant in the refrigeration system to be detected according to the target function relation, the current operating frequency, the current temperature and the current load current;
determining a third threshold value according to the standard quantity of the refrigerant in the refrigeration system to be detected;
judging whether the first refrigerant quantity meets the following conditions: and if so, determining that the refrigerant in the refrigeration system to be detected leaks.
In one embodiment of the invention, the second determining module 404 is configured to perform the following operations:
calculating a first temperature of a target evaporator in the refrigeration system to be detected according to the target function relation, the current operating frequency, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a fourth threshold value according to the current temperature;
judging whether the first temperature meets the following conditions: the first temperature is greater than the current temperature, and an absolute value of a difference between the first temperature and the current temperature is greater than a fourth threshold, and if so, it is determined that refrigerant leakage in the refrigeration system to be detected occurs.
It is to be understood that the illustrated structure of the embodiment of the present invention does not constitute a specific limitation to the detection device of the refrigeration system. In other embodiments of the invention, the refrigerant system detection device may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Because the content of information interaction, execution process, and the like among the modules in the device is based on the same concept as the method embodiment of the present invention, specific content can be referred to the description in the method embodiment of the present invention, and is not described herein again.
The embodiment of the invention also provides a detection device of the refrigeration system, which comprises: at least one memory area and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor is configured to invoke the machine readable program to perform a refrigeration system detection method of any embodiment of the present invention.
Embodiments of the present invention also provide a computer readable medium having stored thereon computer instructions, which, when executed by a processor, cause the processor to perform a refrigeration system detection method according to any of the embodiments of the present invention.
Specifically, a system or an apparatus equipped with a storage medium on which software program codes that realize the functions of any of the above-described embodiments are stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program codes stored in the storage medium.
In this case, the program code itself read from the storage medium can realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.
Examples of the storage medium for supplying the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer via a communications network.
Further, it should be clear that the functions of any one of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform a part or all of the actual operations based on instructions of the program code.
Further, it is to be understood that the program code read out from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then causes a CPU or the like mounted on the expansion board or the expansion module to perform part or all of the actual operations based on instructions of the program code, thereby realizing the functions of any of the above-described embodiments.
In summary, the detection method, the detection device and the readable medium for the refrigeration system provided by each of the present invention at least have the following advantages:
1. in the embodiment of the invention, the corresponding relation between the machine type of the inverter compressor and the function relation is pre-stored, after the current operating frequency and the current load current of the target inverter compressor in the refrigeration system to be detected, the current temperature of the target evaporator in the refrigeration system to be detected and the standard quantity of the refrigerant in the refrigeration system to be detected are obtained, the target function relation corresponding to the target inverter compressor is determined from the corresponding relation, and whether the refrigerant leakage occurs in the refrigeration system to be detected is determined according to the target function relation and the existing parameters. Therefore, the variable frequency compressors of different models have different functional relationships correspondingly, whether the refrigerant in the refrigeration system leaks can be determined according to the corresponding functional relationships and the existing parameters in the refrigeration system, the existing parameters are detected by the original built-in sensor in the refrigeration system, and the required parameters are obtained without additionally arranging a sensor, so that whether the refrigerant in the refrigeration system leaks can be detected more conveniently.
2. In the embodiment of the invention, the operation load of the variable frequency compressor is changed after the refrigerant in the refrigeration system leaks, the load of the variable frequency compressor is mainly in direct relation with the operation frequency of the variable frequency compressor, the temperature of an evaporator in the refrigeration system, the amount of the refrigerant in the refrigeration system and the type of the refrigerant, the type of the refrigerant of each type of variable frequency compressor is determined, and the operation frequency, the load current and the temperature of the evaporator in the refrigeration system of the variable frequency compressor can be directly detected and obtained by the refrigeration system except that the amount of the refrigerant can not be directly obtained.
3. In the embodiment of the invention, the current operating frequency of the target variable frequency compressor in the refrigeration system to be detected, the current temperature of the target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of the refrigerant in the refrigeration system to be detected are obtained, and the parameters can be obtained regularly according to the preset period to detect the refrigeration system, so that the normal operation of the refrigeration system to be detected is ensured in real time, and the reliability and the safety of the refrigeration system are improved.
4. In the embodiment of the present invention, the correspondence between the model of the inverter compressor and the functional relationship may be obtained by: firstly, a plurality of variable frequency compressors of different models are selected, and a plurality of groups of parameter data of the variable frequency compressors when the refrigerant does not leak are obtained aiming at each variable frequency compressor, wherein the parameter data comprise: the operation frequency and the load current of the inverter compressor, the evaporator temperature in the refrigeration system where the inverter compressor is located and the standard quantity of the refrigerant are processed through induction, data fitting and the like on parameter data of each inverter compressor to obtain a functional relation related to the type of the inverter compressor, and different types of the inverter compressors correspond to different functional relations, so that the functional relation is suitable for various compressors.
5. In the embodiment of the invention, according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, whether the refrigerant of the refrigeration system to be detected leaks or not can be determined, and the pipeline blockage of the refrigeration system to be detected can also be determined, so that the reliability of the detection method of the refrigeration system is further improved.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A method of refrigerant system testing, the method comprising:
the method comprises the following steps of pre-storing a corresponding relation between the machine type of the variable frequency compressor and a functional relation, wherein the functional relation comprises the following steps: the operation frequency of the variable frequency compressor, the temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, the load current of the variable frequency compressor and the standard amount of a refrigerant in the refrigeration system where the variable frequency compressor is located;
further comprising:
acquiring the current operating frequency of a target variable frequency compressor in a refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of a refrigerant in the refrigeration system to be detected;
determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation;
and determining whether the refrigerant in the refrigeration system to be detected leaks or not according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected.
2. The method of claim 1,
the functional relationship corresponding to the model of the ith variable frequency compressor comprises the following steps:
Figure FDA0002663730950000011
wherein f is used to characterize the variable frequency compressionThe running frequency of the compressor, I is used for representing the load current of the variable frequency compressor, T is used for representing the temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, L is used for representing the standard quantity of a refrigerant in the refrigeration system where the variable frequency compressor is located, and aiA first coefficient corresponding to the model of the ith variable frequency compressor, biAnd the second coefficient is used for representing the second coefficient corresponding to the model of the ith variable frequency compressor.
3. The method according to claim 1 or 2,
determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, including:
calculating a first operating frequency according to the objective function relation, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a first threshold value according to the current operating frequency;
judging whether the first operating frequency meets the following conditions: and the first operating frequency is less than the current operating frequency, the absolute value of the difference value between the first operating frequency and the current operating frequency is greater than the first threshold value, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
4. The method of claim 3,
further comprising:
when the first operating frequency is greater than the current operating frequency and the absolute value of the difference between the first operating frequency and the current operating frequency is greater than the first threshold, determining that a pipeline in the refrigeration system to be detected is blocked;
and when the absolute value of the difference value between the first operating frequency and the current operating frequency is smaller than or equal to the first threshold value, determining that the refrigerant in the refrigeration system to be detected does not leak.
5. The method according to claim 1 or 2,
determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, and further comprising:
calculating a first load current according to the objective function relation, the current operating frequency, the current temperature and the standard quantity of the refrigerant in the refrigeration system to be detected;
determining a second threshold value according to the current load current;
judging whether the first load current meets the following conditions: and the first load current is smaller than the current load current, the absolute value of the difference value between the first load current and the current load current is larger than the second threshold value, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
6. The method according to claim 1 or 2,
determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, and further comprising:
calculating a first refrigerant quantity of the refrigerant in the refrigeration system to be detected according to the objective function relation, the current operation frequency, the current temperature and the current load current;
determining a third threshold value according to the standard quantity of the refrigerant in the refrigeration system to be detected;
determining whether the first amount of refrigerant satisfies: and the first refrigerant quantity is smaller than the standard quantity of the refrigerant in the refrigerating system to be detected, the absolute value of the difference value between the first refrigerant quantity and the standard quantity of the refrigerant in the refrigerating system to be detected is larger than the third threshold value, and if the absolute value is larger than the third threshold value, the refrigerant leakage in the refrigerating system to be detected is determined.
7. The method according to claim 1 or 2,
determining whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship, the current operating frequency, the current temperature, the current load current and the standard quantity of the refrigerant in the refrigeration system to be detected, and further comprising:
calculating a first temperature of a target evaporator in the refrigeration system to be detected according to the target function relation, the current operation frequency, the current load current and a standard quantity of a refrigerant in the refrigeration system to be detected;
determining a fourth threshold value according to the current temperature;
judging whether the first temperature meets the following conditions: and the first temperature is greater than the current temperature, the absolute value of the difference between the first temperature and the current temperature is greater than the fourth threshold, and if so, the refrigerant leakage in the refrigeration system to be detected is determined.
8. A refrigerant system testing apparatus, comprising: the device comprises a storage module, an acquisition module, a first determination module and a second determination module;
the storage module is used for storing the corresponding relation between the model of the inverter compressor and the functional relation, wherein the functional relation comprises: the operation frequency of the variable frequency compressor, the temperature of an evaporator in a refrigeration system where the variable frequency compressor is located, the load current of the variable frequency compressor and the standard amount of a refrigerant in the refrigeration system where the variable frequency compressor is located;
the acquisition module is used for acquiring the current operating frequency of a target variable frequency compressor in the refrigeration system to be detected, the current temperature of a target evaporator in the refrigeration system to be detected, the current load current of the target variable frequency compressor and the standard quantity of refrigerant in the refrigeration system to be detected;
the first determining module is used for determining a target function relation corresponding to the machine type of the target variable frequency compressor according to the corresponding relation stored in the storage module;
the second determining module is configured to determine whether the refrigerant in the refrigeration system to be detected leaks according to the objective function relationship determined by the first determining module, the current operating frequency, the current temperature, the current load current, and the standard quantity of the refrigerant in the refrigeration system to be detected, which are obtained by the obtaining module.
9. A refrigerant system testing apparatus, comprising: at least one memory and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor, configured to invoke the machine readable program to perform the method of any of claims 1 to 7.
10. A computer readable medium having stored thereon computer instructions which, when executed by a processor, cause the processor to perform the method of any of claims 1 to 7.
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