CN107314519B - Method and device for judging refrigerant leakage of air conditioner - Google Patents
Method and device for judging refrigerant leakage of air conditioner Download PDFInfo
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- CN107314519B CN107314519B CN201710449021.5A CN201710449021A CN107314519B CN 107314519 B CN107314519 B CN 107314519B CN 201710449021 A CN201710449021 A CN 201710449021A CN 107314519 B CN107314519 B CN 107314519B
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Abstract
The embodiment of the application provides a method and a device for judging air conditioner refrigerant leakage, relates to the technical field of air conditioners, and can timely and effectively judge whether the air conditioner refrigerant leaks. The method comprises the following steps: acquiring a current load index of the air conditioner, wherein the load index of the air conditioner comprises an input current of a built-in compressor of the air conditioner or an input current of the whole air conditioner; judging whether the current load index of the air conditioner is smaller than a first threshold value or not; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked; if yes, the refrigerant in the air conditioner is judged to be leaked, and if not, the refrigerant in the air conditioner is judged not to be leaked.
Description
Technical Field
The present disclosure relates to the field of air conditioning technologies, and in particular, to a method and an apparatus for determining refrigerant leakage of an air conditioner.
Background
At present, there are three common conditions of refrigerant leakage of an air conditioner, the first is that the air conditioner has refrigerant leakage before installation; the second is that when the air conditioner is installed, the refrigerant of the air conditioner system leaks due to the mobile air conditioner and the like; the third is the leakage of refrigerant caused by system aging and the like in the use of the air conditioner. For the air conditioner user, only usually can notice the air conditioner when the air conditioner refrigeration heats the effect and is not obvious just can discover that the refrigerant leaks when, and often this time, the refrigerant leaks comparatively seriously, and at this moment, if the compressor is still in continuous operation, compressor driving motor heats up because of the effective cooling that can not obtain the refrigerant gradually, but when the temperature exceeded driving motor insulating material's high temperature resistant upper limit, the compressor will burn out.
In order to solve the problem, the prior art mainly determines whether the air conditioner leaks the refrigerant according to the temperature difference between the indoor return air temperature and the indoor evaporator coil temperature detected by a temperature sensor. Generally, when the refrigerant of the air conditioner leaks no or a small amount, the temperature difference between the refrigerant and the air conditioner is large, and when the refrigerant leaks seriously, the temperature difference between the refrigerant and the air conditioner is small. However, the following disadvantages are usually present when the refrigerant is determined to be leaked by the temperature difference between the indoor return air temperature and the indoor evaporator coil temperature:
1) the system misjudgment is caused by overhigh temperature of the compressor or severe frosting of the evaporator. For example, when the refrigerant is not leaked, if the temperature of the compressor is too high or the evaporator is heavily frosted, the air conditioner controller can stop the compressor, and at the moment, the temperature of the evaporator coil and the return air temperature are relatively close to each other, so that the system misjudgment is caused; alternatively, when the refrigerant leaks to a certain amount (e.g., 30% to 80% of the standard refrigerant amount), the evaporator will have obvious frosting, resulting in a large temperature difference between the indoor evaporator coil temperature and the indoor return air temperature, and thus causing system misjudgment.
2) Due to the influence of the accuracy of the temperature sensor and the temperature field around the temperature sensor, the temperature data caused by collection is distorted, and the system misjudgment is caused.
Disclosure of Invention
The embodiment of the application provides a method and a device for judging the leakage of a refrigerant of an air conditioner, which can timely and effectively judge whether the refrigerant of the air conditioner leaks.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, a method for determining refrigerant leakage in an air conditioner includes:
acquiring a current load index of the air conditioner, wherein the load index of the air conditioner comprises an input current of a built-in compressor of the air conditioner or an overall input current of the air conditioner;
judging whether the current load index of the air conditioner is smaller than a first threshold value or not; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked;
if so, judging that the refrigerant in the air conditioner leaks, and if not, judging that the refrigerant in the air conditioner does not leak.
In a second aspect, there is provided an apparatus for determining refrigerant leakage in an air conditioner, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current load index of the air conditioner, and the load index of the air conditioner comprises the input current of a built-in compressor of the air conditioner or the whole machine input current of the air conditioner;
the judging module is used for judging whether the current load index of the air conditioner acquired by the acquiring module is smaller than a first threshold value or not; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked; if so, judging that the refrigerant in the air conditioner leaks, and if not, judging that the refrigerant in the air conditioner does not leak.
In a third aspect, an air conditioner is provided, comprising the air conditioner refrigerant leakage determination device of the second aspect.
Because the amount of refrigerant of the air-conditioning system directly affects the load of the air-conditioner, and the change of the load of the air-conditioner can be directly reflected on the input current of the compressor (except the input current of the compressor, other currents can not change when the refrigerant leaks in all the currents contained in the input current of the air-conditioning system). If the current load index of the air conditioner is smaller than the first threshold value, the refrigerant in the air conditioner is judged to be leaked, and if the current load index of the air conditioner is larger than or equal to the first threshold value, the refrigerant in the air conditioner is judged not to be leaked.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for determining refrigerant leakage of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating another method for determining refrigerant leakage of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart illustrating a method for determining refrigerant leakage of an air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart illustrating another method for determining refrigerant leakage of an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a device for determining refrigerant leakage of an air conditioner according to an embodiment of the present disclosure.
Detailed Description
The execution main body of the method for judging the refrigerant leakage of the air conditioner provided by the embodiment of the invention can be a judging device for judging the refrigerant leakage of the air conditioner or an electronic device for executing the method for judging the refrigerant leakage of the air conditioner. The device for determining refrigerant leakage of the air conditioner may be a Central Processing Unit (CPU) in the electronic device, or may be a control unit or module in the electronic device. The device for judging the refrigerant leakage of the air conditioner is usually arranged in the air conditioner and used for monitoring whether the refrigerant in the air conditioner leaks in real time.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It should be noted that in the embodiments of the present invention, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the intended meanings are consistent when the differences are not emphasized. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the embodiments of the present invention, the terms "first", "second", and the like are used for distinguishing identical items or similar items having substantially the same functions or actions, and those skilled in the art will understand that the terms "first", "second", and the like do not limit the quantity or execution order.
In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
An embodiment of the present application provides a method for determining refrigerant leakage of an air conditioner, as shown in fig. 1, the method includes the following steps:
and S101, acquiring a current load index of the air conditioner.
Wherein, the load index of the air conditioner includes: the input current of the compressor or the input current of the air conditioning system. It should be noted that, because the input current of the air conditioning system is composed of the input current of the compressor, the fan current and the loss current of the air conditioning controller, and the ratio of the fan current and the loss current of the air conditioning controller in the current of the whole air conditioner is small, the influence of the refrigerant leakage on the fan current and the loss current of the controller is small, the input current of the air conditioning system can also be used to represent the load condition of the compressor.
In an example, the current load index of the air conditioner can be detected by a current detection device such as a current transformer, the current transformer is not interfered by factors around the detection element, and the detected current data is accurate.
S102, judging whether the current load index of the air conditioner is smaller than a first threshold value.
The first threshold is a load index of the air conditioner under the minimum load when the refrigerant of the air conditioner is not leaked.
For example, since the amount of refrigerant in the air conditioning system directly affects the load of the air conditioner, the load change of the compressor is directly reflected on the load index of the air conditioner. Generally, if the air-conditioning system does not leak refrigerant, the load index of the air-conditioner will not change greatly, and if the air-conditioning system leaks refrigerant, the amount of refrigerant in the air-conditioning system decreases, resulting in a decrease in the load of the compressor.
And S103a, if the judgment result is yes, judging that the refrigerant in the air conditioner leaks.
And S103b, if the judgment result is negative, judging that the refrigerant in the air conditioner does not leak.
It should be noted that, in order to improve the detection accuracy, the following steps may be further included after step S103a or step S103 b:
a1, detecting the current load index of the air conditioner again;
and A2, judging whether the current load index of the air conditioner detected again is smaller than a first threshold value.
Specifically, in order to avoid the compressor failure caused by the operation of the air conditioner during the refrigerant leakage, it is preferable that, when it is determined that the air conditioner has the refrigerant leakage for the first time, the compressor is set to the shutdown state and restarted before the second refrigerant leakage determination is performed (i.e., before the steps a1-a2 are performed), so that the compressor stops operating, and a stop reason code is sent to the line controller or the display screen, and finally the air conditioner is shut down. Generally, the air conditioner is usually stopped for 3 minutes, and the air conditioner can be automatically restarted after 3 minutes, which is not limited in the embodiments of the present invention.
Meanwhile, after the air conditioner executes step a2, namely after the air conditioner continuously determines that the air conditioner leaks the refrigerant for the second time or more, if the air conditioner still determines that the refrigerant leaks, the air conditioner triggers an alarm and sends an alarm code to the line controller or the display screen, so that the line controller or the display screen stops working according to the alarm code and enters a shutdown state. Illustratively, the alarm is only deactivated when the air conditioner is powered down.
In addition, if it is determined that the air conditioner refrigerant leaks, the number of times of refrigerant leakage may be counted. When step A1-A2 is executed, if the refrigerant leakage is judged again, the accumulated count is carried out on the basis of the original refrigerant leakage frequency, and an alarm is triggered; if the refrigerant leakage is determined not to occur, the alarm is not triggered, and the air conditioner works normally.
And when the air conditioner meets the preset condition, resetting the number of times of refrigerant leakage and restoring the current air volume type of the air conditioner to the air volume type set by the user, namely resetting the air volume type. The preset condition can be that the air conditioner refrigerant leaks, the line controller of the indoor unit of the air conditioner is stopped after the air conditioner refrigerant leaks and the steps A1-A3 are executed within a specified time, or the power supply of the indoor unit of the air conditioner is cut off. For example, the designated time may be 1 hour, which is not limited in the embodiment of the present invention.
Optionally, this application is through detecting compressor input current or air conditioning system input current, alright discern whether the compressor is in normal operating condition at present, judge whether the system load of compressor changes at air conditioner operating mode regularly promptly, confirm whether the air conditioner takes place the refrigerant leakage.
In one example, the present application may further determine whether the compressor is currently in an operating state by the following steps. Specifically, after step S101, the method further includes the following steps:
and B1, judging whether the air conditioner executes the air conditioner refrigerant leakage judging program according to the current load index of the air conditioner.
B2, if the current input current of the built-in compressor of the air conditioner is equal to 0 and/or the current complete machine input current of the air conditioner is equal to the complete machine current in the air supply state of the air conditioner, judging that the built-in compressor of the air conditioner is in a non-working state, and not executing the refrigerant leakage judging program; otherwise, judging that the built-in compressor of the air conditioner is in a working state, and executing a refrigerant leakage judging program.
In one example, when the load index of the air conditioner is the input current of the compressor, the corresponding refrigerant leakage determination process is as follows:
s201a, detecting the current input current of the compressor.
S202a, judging whether the current input current of the compressor is smaller than the input current of the compressor under the minimum load when the refrigerant of the air conditioner is not leaked.
And S203a1, if yes, judging that the refrigerant in the air conditioner leaks.
And S203a2, if not, judging that the refrigerant in the air conditioner does not leak.
In one example, when the load index of the air conditioner is the input current of the air conditioning system, the corresponding refrigerant leakage determination process is as follows:
s201b, detecting the current input current of the air conditioning system.
S202b, judging whether the current input current of the air conditioning system is smaller than the input current of the air conditioning system when the refrigerant of the air conditioner is not leaked, wherein the input current of the air conditioning system is under the minimum load of the compressor.
And S203b1, if yes, judging that the refrigerant in the air conditioner leaks.
And S203b2, if not, judging that the refrigerant in the air conditioner does not leak.
Because the refrigerant quantity of the air-conditioning system directly affects the load of the compressor, and the change of the load of the compressor can be directly reflected on the input current of the compressor (except the input current of the compressor, other currents can not change when the refrigerant leaks in all currents contained in the input current of the air-conditioning system).
Optionally, the scheme provided by the present application further includes the following steps:
and C1, judging whether the current load index of the air conditioner is smaller than a second threshold value.
C2, if yes, controlling the compressor to stop; otherwise, controlling the compressor to normally operate.
And when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity, the second threshold is a load index of the air conditioner under the maximum load, and A is less than or equal to 100.
It should be noted that when a is equal to 100, it indicates that the refrigerant is not leaked, i.e., the second threshold is equal to the first threshold. This application is through reasonable setting for the second threshold value, and the refrigerant that needs to shut down is leaked the proportion to reasonable setting promptly, controls the air conditioner and shuts down when the system refrigerant is less than a certain proportion, protects air conditioning system.
Optionally, the scheme provided by the present application further includes the following steps:
and D1, if the current load index of the air conditioner is larger than the third threshold and smaller than the first threshold, controlling the compressor to normally operate.
The third threshold is a load index of the air conditioner under the minimum load when the refrigerant quantity of the air conditioner is equal to B% of the standard refrigerant quantity; b is greater than A and less than 100.
Therefore, when the refrigerant is not leaked and the refrigerant quantity of the system is less than or equal to A%, no matter what working condition, the detection program must be capable of accurately judging the refrigerant leakage and carrying out shutdown protection on the system to avoid the high-temperature burning of the compressor; when the refrigerant quantity of the system is 100%, the detection program can not absolutely carry out shutdown protection on the system under any load working condition, namely when the refrigerant of the system is not leaked, the detection program can not generate misjudgment under any load working condition; or, when the refrigerant leaks in a small amount, the refrigerant amount of the system is more than or equal to B%, and the system still has large refrigerating/heating capacity, the detection program can not absolutely carry out shutdown protection on the system under any load working condition, namely, when the refrigerant of the system does not leak in a small amount, the detection program can not generate misjudgment under any working condition. In addition, the user can select the degree of cold leakage to which to shut down the system.
For example, referring to the flow chart for determining refrigerant leakage of the air conditioner shown in fig. 2, after the air conditioning system is started and operated for a predetermined time N1, the input current I of the air conditioning system or the compressor is detected, when the detected current I satisfies a set threshold I0 or more and I1 or less, the refrigerant leakage of the air conditioning system is determined, the control program forces the compressor to stop, and a refrigerant leakage fault code is displayed on a line controller or a display panel; if the detection current I does not meet the set current threshold I0 and I1, the air-conditioning system is judged to have no refrigerant leakage, the system normally operates, and the system current is continuously monitored at the frequency of N2 minutes/time. Where I0 is 0, and I1 is the second threshold in this application.
Further, in order to improve the judgment precision, when the detection current I meets the set threshold I0 and I1, the control program repeats the current detection and judgment process at the frequency of N2 minutes/time, if the detection current meets the set threshold I0 and I1 for B times continuously, the system refrigerant leakage is judged, the control program forces the compressor to stop, and the refrigerant leakage fault code is displayed on a line controller or a display panel.
Optionally, before controlling the compressor to stop, the method provided by the present application further includes the following steps:
and S301, acquiring the current indoor evaporator coil temperature and the current indoor return air temperature of the air conditioner.
In one example, the indoor evaporator coil temperature is obtained by an indoor coil temperature sensor arranged in the indoor unit, and is generally used for indicating the temperature of a refrigerant in the indoor coil; the indoor return air temperature is typically sensed by a temperature sensor located at the inlet of the indoor unit fan and is typically used to indicate the ambient indoor temperature.
And S302, judging whether the absolute difference value between the current indoor evaporator coil temperature and the current indoor return air temperature is smaller than a fourth threshold value.
The fourth threshold is the minimum value of the absolute difference between the indoor evaporator coil temperature and the indoor return air temperature when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity.
S303, if the absolute difference value is smaller than a fourth threshold value, controlling the compressor to stop; and if the absolute difference value is larger than or equal to the fourth threshold value, controlling the compressor to normally operate.
Generally, when the refrigerant of the air conditioner leaks in no or a small amount, the temperature difference between the indoor evaporator coil temperature and the indoor return air temperature is generally larger, and when the refrigerant leaks seriously, the temperature difference between the indoor evaporator coil temperature and the indoor return air temperature is smaller.
For example, referring to the flow chart of determining refrigerant leakage of the air conditioner shown in fig. 3, after the air conditioning system is started to operate for a predetermined time N1, the input current I of the air conditioning system or the compressor is detected, and if the detected current I satisfies a set threshold I0 ≤ I1, the control program repeats the above current detection and determination processes at a frequency of N2 minutes/time; if the detection current I does not meet the set current threshold I0 and I1, judging that no refrigerant leaks, normally operating the system, and continuously monitoring the system current at the frequency of N2 minutes/time. If the detection current continuously satisfies the set threshold I0 ≦ I1 for B times, the control program enters the determination flow of detecting the evaporator coil temperature T1 and the return air temperature T2 in the temperature detection cycle shown in FIG. 4. If the absolute value of T1-T2 is less than a preset threshold Tk, the control program repeats the temperature detection process at the frequency of N3 minutes/time, and if the absolute value of T1-T2 is more than or equal to the preset threshold Tk, the system is judged to have no refrigerant leakage and normally operates; and if the absolute value of T1-T2 is less than the preset threshold Tk for B times, judging the leakage of the system refrigerant, controlling the program to force the compressor to stop, and displaying a refrigerant leakage fault code on a line controller or a display board.
The following describes embodiments of the apparatus provided by embodiments of the present application, which correspond to the embodiments of the method provided above. It should be noted that, for the following explanation of the related contents in the embodiments of the apparatus, reference may be made to the above-mentioned embodiments of the method.
Fig. 5 is a schematic diagram showing a possible configuration of the device for determining refrigerant leakage in the air conditioner according to the embodiment, and referring to fig. 5, the device includes: an obtaining module 41 and a determining module 42, wherein:
the obtaining module 41 is configured to obtain a current load index of the air conditioner, where the load index of the air conditioner includes an input current of a built-in compressor of the air conditioner or an input current of the air conditioner.
A determining module 42, configured to determine whether the current load index of the air conditioner acquired by the acquiring module 41 is smaller than a first threshold; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked; if yes, the refrigerant in the air conditioner is judged to be leaked, and if not, the refrigerant in the air conditioner is judged not to be leaked.
Optionally, as shown in fig. 5, the apparatus further includes: a control module 43, wherein:
the determining module 42 is further configured to: and judging whether the current load index of the air conditioner is smaller than a second threshold value.
The control module 43 is further used for controlling the compressor to stop if the judgment result of the judgment module 42 is yes; and if the judgment result of the judgment module is negative, controlling the compressor to normally operate.
The second threshold is a load index of the air conditioner under the maximum load when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity, and A is less than or equal to 100.
Optionally, the control module 43 is further configured to control the compressor to normally operate if the current load index of the air conditioner is greater than the third threshold and smaller than the first threshold.
The third threshold is a load index of the air conditioner under the minimum load when the refrigerant quantity of the air conditioner is equal to B% of the standard refrigerant quantity; b is greater than A and less than 100.
Optionally, the determining module 42 is further configured to:
judging whether the air conditioner executes an air conditioner refrigerant leakage judging program or not according to the current load index of the air conditioner; if the current input current of the built-in compressor of the air conditioner is equal to 0 and/or the current complete machine input current of the air conditioner is equal to the complete machine current in the air supply state of the air conditioner, judging that the built-in compressor of the air conditioner is in a non-working state, and not executing a refrigerant leakage judging program; otherwise, judging that the built-in compressor of the air conditioner is in a working state, and executing a refrigerant leakage judging program.
Optionally, the obtaining module 41 is configured to obtain a current indoor evaporator coil temperature and a current indoor return air temperature of the air conditioner.
A determination module 42, configured to determine whether an absolute difference between the current indoor evaporator coil temperature and the current indoor return air temperature is less than a fourth threshold; the fourth threshold is the minimum value of the absolute difference between the indoor evaporator coil temperature and the indoor return air temperature when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity.
The control module 43 is further configured to control the compressor to stop if the absolute difference is smaller than a fourth threshold; and if the absolute difference value is larger than or equal to the fourth threshold value, controlling the compressor to normally operate.
An embodiment of the present application further provides an air conditioner, which includes the device for determining refrigerant leakage of the air conditioner shown in fig. 5.
It should be noted that, in a specific implementation process, each step executed in the method flows shown in fig. 1 to fig. 4 may be implemented by a processor in a hardware form executing a computer execution instruction in a software form stored in a memory, and is not described herein again to avoid repetition. The program corresponding to the action executed by the device can be stored in the memory of the device in a software form, so that the processor can call and execute the operation corresponding to each module. The memory above may include volatile memory (volatile memory), such as random-access memory (RAM); a non-volatile memory (non-volatile memory) such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); combinations of the above categories of memory may also be included.
The processor in the above-provided apparatus may be a single processor or may be a collective term for a plurality of processing elements. For example, the processor may be a central processing unit (CPU; other general purpose processors, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (9)
1. A method for judging refrigerant leakage of an air conditioner is characterized by comprising the following steps:
acquiring a current load index of the air conditioner, wherein the load index of the air conditioner comprises an input current of a built-in compressor of the air conditioner or an overall input current of the air conditioner;
judging whether the current load index of the air conditioner is smaller than a first threshold value or not; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked; if so, judging that the refrigerant in the air conditioner leaks, and if not, judging that the refrigerant in the air conditioner does not leak;
judging whether the current load index of the air conditioner is smaller than a second threshold value; the second threshold is a load index of the air conditioner under the maximum load when the refrigerant quantity of the air conditioner is equal to A% of a standard refrigerant quantity, and A is less than or equal to 100;
if yes, controlling the compressor to stop; if not, controlling the compressor to normally operate.
2. The method of claim 1, wherein after obtaining the current load index of the air conditioner, the method further comprises:
if the current load index of the air conditioner is larger than a third threshold and smaller than a first threshold, controlling the compressor to normally operate;
the third threshold is a load index of the air conditioner under the minimum load when the refrigerant quantity of the air conditioner is equal to B% of a standard refrigerant quantity; b is less than 100.
3. The method of claim 1, wherein determining whether the current load index of the air conditioner is less than a first threshold value comprises:
judging whether the air conditioner executes a refrigerant leakage judging program of the air conditioner or not according to the current load index of the air conditioner;
if the current input current of the built-in compressor of the air conditioner is equal to 0 and/or the current complete machine input current of the air conditioner is equal to the complete machine current in the air supply state of the air conditioner, judging that the built-in compressor of the air conditioner is in a non-working state, and not executing the refrigerant leakage judging program; otherwise, judging that the built-in compressor of the air conditioner is in a working state, and executing the refrigerant leakage judging program.
4. The method of claim 1, wherein prior to controlling the compressor to shutdown, further comprising:
acquiring the current indoor evaporator coil temperature and the current indoor return air temperature of the air conditioner;
judging whether the absolute difference value between the current indoor evaporator coil temperature and the current indoor return air temperature is smaller than a fourth threshold value; the fourth threshold value is the minimum value of the absolute difference between the indoor evaporator coil temperature and the indoor return air temperature when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity;
if the absolute difference value is smaller than the fourth threshold value, controlling the compressor to stop;
and if the absolute difference value is larger than or equal to the fourth threshold value, controlling the compressor to normally operate.
5. An apparatus for determining refrigerant leakage in an air conditioner, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current load index of the air conditioner, and the load index of the air conditioner comprises the input current of a built-in compressor of the air conditioner or the whole machine input current of the air conditioner;
the judging module is used for judging whether the current load index of the air conditioner acquired by the acquiring module is smaller than a first threshold value or not; the first threshold value is a load index of the air conditioner under the minimum load when a refrigerant of the air conditioner is not leaked; if so, judging that the refrigerant in the air conditioner leaks, and if not, judging that the refrigerant in the air conditioner does not leak; and is also used for: judging whether the current load index of the air conditioner is smaller than a second threshold value; the second threshold is a load index of the air conditioner under the maximum load when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity, and A is less than or equal to 100;
the control module is used for controlling the compressor to stop if the judged load index of the judging module is smaller than a second threshold value; and if the judgment load index of the judgment module is larger than or equal to a second threshold value, controlling the compressor to normally operate.
6. The device of claim 5, wherein the control module is further configured to control the compressor to normally operate if the current load indicator of the air conditioner is greater than a third threshold and less than a first threshold;
the third threshold is a load index of the air conditioner under the minimum load when the refrigerant quantity of the air conditioner is equal to B% of a standard refrigerant quantity; b is less than 100.
7. The apparatus of claim 5, wherein the determining module is further configured to:
judging whether the air conditioner executes a refrigerant leakage judging program of the air conditioner or not according to the current load index of the air conditioner;
if the current input current of the built-in compressor of the air conditioner is equal to 0 and/or the current complete machine input current of the air conditioner is equal to the complete machine current in the air supply state of the air conditioner, judging that the built-in compressor of the air conditioner is in a non-working state, and not executing the refrigerant leakage judging program; otherwise, judging that the built-in compressor of the air conditioner is in a working state, and executing the refrigerant leakage judging program.
8. The apparatus of claim 5,
the acquisition module is used for acquiring the current indoor evaporator coil temperature and the current indoor return air temperature of the air conditioner;
the judging module is used for judging whether the absolute difference value between the current indoor evaporator coil temperature and the current indoor return air temperature is smaller than a fourth threshold value; the fourth threshold value is the minimum value of the absolute difference between the indoor evaporator coil temperature and the indoor return air temperature when the refrigerant quantity of the air conditioner is equal to A% of the standard refrigerant quantity;
the control module is further configured to control the compressor to stop if the absolute difference value is smaller than the fourth threshold; and if the absolute difference value is larger than or equal to the fourth threshold value, controlling the compressor to normally operate.
9. An air conditioner characterized by comprising the air conditioner refrigerant leakage determination device according to any one of claims 5 to 8.
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| CN108131776B (en) * | 2017-12-29 | 2020-11-17 | Tcl空调器(中山)有限公司 | Air conditioner fluorine deficiency protection method and air conditioner |
| CN110836434B (en) * | 2018-08-16 | 2021-06-25 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and device |
| CN110836519B (en) * | 2018-08-16 | 2021-06-22 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and detection system |
| CN110848875B (en) * | 2018-08-21 | 2021-05-18 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioner |
| CN108954666A (en) * | 2018-08-21 | 2018-12-07 | 珠海格力电器股份有限公司 | A kind of unit, isolating device and coolant leakage processing method, device |
| CN110940046B (en) * | 2018-09-21 | 2021-08-24 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioner |
| CN110940050B (en) * | 2018-09-21 | 2021-04-27 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioner |
| CN110940047B (en) * | 2018-09-21 | 2021-04-02 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioner |
| CN111442468A (en) * | 2020-04-10 | 2020-07-24 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
| CN112179592B (en) * | 2020-09-02 | 2022-05-24 | 四川虹美智能科技有限公司 | Refrigeration system detection method, device and readable medium |
| CN114234359B (en) * | 2021-11-09 | 2023-03-28 | 海信（广东）空调有限公司 | Air conditioner and refrigerant leakage detection method thereof |
| CN114061020B (en) * | 2021-11-17 | 2023-03-21 | 苏州浪潮智能科技有限公司 | Refrigerant leakage detection method and system for two-phase cold plate liquid cooling system |
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