CN110398022B - Air conditioner overload protection judgment method and device and air conditioner - Google Patents
Air conditioner overload protection judgment method and device and air conditioner Download PDFInfo
- Publication number
- CN110398022B CN110398022B CN201910713731.3A CN201910713731A CN110398022B CN 110398022 B CN110398022 B CN 110398022B CN 201910713731 A CN201910713731 A CN 201910713731A CN 110398022 B CN110398022 B CN 110398022B
- Authority
- CN
- China
- Prior art keywords
- temperature difference
- overload protection
- air conditioner
- evaluation
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention provides an air conditioner overload protection judgment method and device and an air conditioner, and relates to the technical field of air conditioners. The air conditioner overload protection judging method comprises the following steps: judging whether the compressor of the air conditioner starts overload protection or not in advance according to the evaluation temperature difference; the evaluation temperature difference is a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval; if the compressor is judged to be started to carry out overload protection in advance, controlling an inner fan of the air conditioner to stop running; and after the internal fan stops running for a specified time, evaluating whether the recorded overload protection number value is increased or not according to the newly acquired evaluation temperature difference so as to control the outdoor unit of the air conditioner to stop when the overload protection number value exceeds a preset threshold value. Accurate and reliable compressor overload times are obtained through double judgment, the air conditioner can conveniently and timely decide whether to adopt a shutdown protection mode to guarantee the service life of the compressor, and the compressor is prevented from being damaged.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner overload protection judgment method and device and an air conditioner.
Background
The air conditioner runs at risk of burning out the compressor if it continues to be in a high load operating state. However, under severe operating conditions (for example, when low voltage, dirty condenser, refrigerant leakage, etc. occur), it is difficult to avoid the constant frequency air conditioner that cannot actively unload the air into a continuous high load operation state.
In order to protect the compressor, a protector is generally installed on the compressor. The protector adopts the mode that the protector is disconnected when the temperature of the compressor coil exceeds the normal use range, so that the compressor stops running, and the protector is attracted when the temperature of the compressor coil belongs to the normal use range, so that the compressor normally works, and the effect of protecting the compressor is achieved. However, the protection times of the protector are limited, frequent overload protection can easily cause the protector to fail, and thus, the compressor is inevitably damaged. In addition, due to cost considerations, the protector is simple in structure, and it is often difficult to obtain the number of times overload protection has been achieved from the protector.
Therefore, under the condition that hardware configuration is not additionally added, the protection frequency of the protector can be accurately identified to be out of limit, so that the air conditioner can be controlled to stop running in time, and the method is very critical to prolonging the service lives of the compressor and the protector.
Disclosure of Invention
The invention solves the problem that the protection frequency of the protector can be accurately identified under the condition of not additionally increasing hardware configuration so as to control the air conditioner to stop running in time.
In order to solve the above problem, an embodiment of the present invention provides an air conditioner overload protection determination method, where the air conditioner overload protection determination method includes: judging whether the compressor of the air conditioner starts overload protection or not in advance according to the evaluation temperature difference; the evaluation temperature difference comprises a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval; if the compressor is judged to be started to carry out overload protection in advance, controlling an inner fan of the air conditioner to stop running; and after the inner fan stops running for a specified time, evaluating whether to increase the recorded overload protection number value according to the newly acquired evaluation temperature difference so as to control the outdoor unit of the air conditioner to stop when the overload protection number value exceeds a preset threshold value. That is, after the occurrence of the overload protection is judged in advance by using the evaluation temperature difference, the inner fan is stopped, whether the overload protection occurs or not is judged again, and the number of times of the overload protection is adjusted according to the judgment result. The obtained overload protection times are more reliable and accurate through the cooperation of multiple judgments, the air conditioner can conveniently make a decision in time to carry out shutdown protection, and the service life of the compressor is guaranteed. Meanwhile, unnecessary hardware equipment is not additionally arranged, and cost is effectively controlled.
In an alternative embodiment, the step of evaluating whether to increase the recorded number of times of overload protection based on the newly acquired evaluation temperature difference comprises: judging whether the newly acquired evaluation temperature difference after the specified time meets a preset condition or not; if the evaluation temperature difference meets the preset condition, increasing the recorded overload protection times; and if the evaluation temperature difference does not meet the preset condition, not increasing the recorded overload protection times. After the inner fan is stopped, judgment is carried out again according to the estimated temperature difference, and misjudgment possibly occurring in the process of prejudgment is eliminated.
In an optional embodiment, the step of judging whether the evaluation temperature difference newly acquired after the specified time period satisfies a preset condition includes: taking the newly acquired evaluation temperature difference as a target temperature difference; acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference; and if the difference value between the target temperature difference and the comparison temperature difference is not higher than a preset first temperature threshold value, judging that the evaluation temperature difference meets a preset condition.
In an optional embodiment, the air conditioner overload protection determining method further includes: and if the newly acquired evaluation temperature difference after the specified time does not meet the preset condition, controlling the inner fan to recover to operate. And unnecessary halt caused by misjudgment is avoided, and the user experience is improved.
In an alternative embodiment, the step of predicting whether the compressor of the air conditioner starts overload protection according to the estimated temperature difference includes: taking the newly acquired evaluation temperature difference as a target temperature difference at each time interval; if the target temperature difference does not exceed a preset second temperature threshold value, acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference; and pre-judging whether the compressor of the air conditioner starts overload protection or not according to the comparison temperature difference and the target temperature difference. Thus, a preliminary overload protection decision is achieved.
In an alternative embodiment, the step of predicting whether the compressor of the air conditioner starts overload protection according to the comparison temperature difference and the target temperature difference comprises: and when the difference value between the comparison temperature difference and the target temperature difference is not lower than a preset third temperature threshold value, judging that the compressor of the air conditioner starts overload protection in advance.
In an optional embodiment, after increasing the recorded number of times of overload protection, the method for determining overload protection of an air conditioner further includes: and if the overload protection times do not exceed the preset threshold value, judging whether to start the inner fan or not according to the newly acquired evaluation temperature difference.
In an optional embodiment, the step of determining whether to start the inner fan according to the newly collected evaluation temperature difference includes: taking the newly acquired evaluation temperature difference as a target temperature difference; acquiring a comparison temperature difference corresponding to the target temperature difference; and if the difference value between the target temperature difference and the comparison temperature difference is not less than a fourth temperature threshold value, controlling the inner fan to recover to operate.
In an optional embodiment, the air conditioner overload protection determining method further includes: sequentially storing the collected evaluation temperature differences according to a collection time sequence to generate a temperature difference sequence; updating the temperature difference sequence according to the newly acquired evaluation temperature difference in each time interval; the step of obtaining the comparison temperature difference corresponding to the target temperature difference comprises the following steps: and taking the evaluation temperature difference listed at the head in the updated temperature difference sequence as the comparison temperature difference.
In an alternative embodiment, the step of updating the temperature difference sequence according to the newly acquired evaluation temperature difference comprises: and when the number of the temperature differences in the temperature difference sequence reaches a preset number threshold value, adding the newly acquired evaluation temperature difference into the temperature difference sequence, and deleting the evaluation temperature difference listed at the head of the temperature difference sequence.
In an optional embodiment, the air conditioner overload protection determining method further includes: and when the normal operation time of the compressor exceeds the preset time, resetting the overload protection time value.
In a second aspect, an embodiment of the present invention provides an air conditioner overload protection determining device, where the air conditioner overload protection determining device includes: the pre-judging module is used for pre-judging whether the compressor of the air conditioner starts overload protection or not according to the evaluation temperature difference; the evaluation temperature difference is a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval; the control module is used for controlling the internal fan of the air conditioner to stop running if the compressor is judged to be started to carry out overload protection in advance; and the evaluation module is used for evaluating whether the recorded overload protection times value is increased or not according to the newly acquired evaluation temperature difference after the inner fan stops running for a specified time, so that when the overload protection times value exceeds a preset threshold value, the outdoor unit of the air conditioner is controlled to stop.
In a third aspect, an embodiment of the present invention provides an air conditioner, including a processor, where the processor may execute machine executable instructions to implement the method described in any one of the foregoing embodiments.
Drawings
Fig. 1 is a schematic view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of an air conditioner overload protection determining method according to an embodiment of the present invention;
fig. 3 is a second flowchart illustrating steps of a method for determining overload protection of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating sub-steps of step S102 in FIG. 2;
fig. 5 is a third flowchart illustrating steps of a method for determining overload protection of an air conditioner according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an air conditioner overload protection determining device according to an embodiment of the present invention.
Description of reference numerals:
100-an air conditioner; 10-a control unit; 20-a compressor; 30-an inner fan; 40-an acquisition unit; 300-air conditioner overload protection judging device; 301-an obtaining module; 302-a prejudgment module; 303-a control module; 304-evaluation module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an air conditioner 100 according to an embodiment of the present invention. The air conditioner 100 includes a control unit 10, a compressor 20, an inner fan 30, and a collecting unit 40. The control unit 10 is used for electrically connecting the compressor 20, the inner fan 30 and the collecting unit 40.
Optionally, the control unit 10 includes a processor and a memory, where the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to control the compressor 20, the inner fan 30 and the collection unit 40 to implement the air conditioner overload protection determination method provided in the embodiment of the present invention. In other embodiments, the memory may also be a device independent from the control unit 10, and is electrically connected to the control unit 10, so that the processor executes the machine executable instructions stored in the memory to control the compressor 20, the inner fan 30 and the collecting unit 40 to implement the air conditioner overload protection determining method provided in the embodiments of the present invention.
The above-mentioned acquisition unit 40 may be a temperature sensor. The temperature sensor comprises a sensor for collecting the indoor temperature and a sensor for collecting the temperature of the indoor coil. It will be appreciated that the temperature sensors described above may be multiplexed with sensors that are native to the air conditioner 100.
The compressor 20 is provided with a protector, and when the temperature of the coil of the compressor 20 exceeds a normal range due to the high-load operation of the air conditioner 100, the protector is automatically disconnected, so that the compressor 20 stops operating. When the temperature of the coil of the compressor 20 returns to normal, the protector is automatically closed, so that the compressor 20 returns to operation. Thereby preventing the compressor 20 from being burned out due to the continuous high-load operation of the air conditioner 100. Of course, as shown above, the number of times of overload protection that the protector can realize is limited, and especially, under a severe working condition, repeated and high-frequency opening and closing of the protector will inevitably cause failure of the protector.
Referring to fig. 2, fig. 2 is a flowchart illustrating an air conditioner overload protection judging method applied to the control unit 10. As shown in fig. 2, the air conditioner overload protection determining method includes the following steps:
step S101, acquiring the indoor temperature and the indoor coil temperature collected according to a preset time interval to obtain an evaluation temperature difference corresponding to each time interval.
In an embodiment of the present invention, the indoor temperature is a real-time temperature of an indoor space served by the air conditioner 100. The indoor coil temperature may be a coil temperature of an indoor evaporator. Alternatively, the control unit 10 may receive the indoor temperature and the indoor coil temperature collected by the collection unit 40 at each time interval. And obtaining the corresponding estimated temperature difference of the time interval according to the indoor temperature and the indoor coil temperature. For example, the difference between the indoor temperature and the indoor coil temperature received at each time interval may be used as the estimated temperature difference collected at that time interval. It is understood that the above step S101 will be performed periodically according to the above time interval. For example, the control unit 10 receives the indoor temperature and the indoor coil temperature collected by the collection unit 40 every 5s, and takes the difference between the received indoor temperature and the indoor coil temperature as the estimated temperature difference collected in this round. It is understood that the control unit 10 starts to acquire the indoor temperature and the indoor coil temperature collected at each time interval after the air conditioner 100 starts to operate. In some embodiments, after the compressor runs for a set time period, the process proceeds to step S102 to start monitoring whether the compressor is in overload protection and trips.
The collected estimated temperature difference is collected in real time, and the data volume is gradually increased along with the increase of time. In order to manage the collected estimated temperature difference, reduce the storage pressure and reduce the performance requirement on the storage, in some embodiments, as shown in fig. 3, on the basis of fig. 2, the air conditioner overload protection determining method may further include the steps of:
step S201, the collected evaluation temperature differences are sequentially stored according to the collection time sequence to generate a temperature difference sequence.
In the embodiment of the present invention, a stack is selected in the memory of the control unit 10, and the stack stores the collected values of the estimated temperature difference therein on a first-in first-out basis, thereby forming a temperature difference sequence. It is understood that in the temperature difference sequence, the acquisition time corresponding to the evaluation temperature difference arranged at the front row is relatively early, and the acquisition time corresponding to the evaluation temperature difference arranged at the rear row is relatively late.
Step S202, in each time interval, the temperature difference sequence is updated according to the newly acquired evaluation temperature difference.
In an embodiment of the present invention, the manner of updating the temperature difference sequence may be: an estimated temperature difference is newly obtained in each time interval and added to the temperature difference sequence. And if the number of the temperature differences in the temperature difference sequence reaches a preset number threshold value, adding the newly acquired evaluation temperature difference into the temperature difference sequence, and deleting the evaluation temperature difference listed at the head of the temperature difference sequence. For example, the threshold number of temperature difference sequences is 12 and 12 evaluation temperature differences are stored and are respectively marked as Δ T1 and Δ T2 … … Δ T12. When the 13 th evaluation temperature difference is acquired, the original Δ T1 is removed from the temperature difference sequence, the original Δ T2 is used as the updated Δ T1, the original Δ T3 is used as the updated Δ T2, and so on, and finally the newly acquired evaluation temperature difference is used as the Δ T12.
Step S102, pre-determining whether the compressor 20 of the air conditioner 100 starts overload protection according to the estimated temperature difference.
In the embodiment of the invention, a new estimated temperature difference is acquired in each time interval. Each time an evaluation temperature difference is obtained, it is determined whether the compressor 20 has started the overload protection based on the evaluation temperature difference. That is, by the cooperation of step S101 and step S102, it is possible to monitor whether the air conditioner 100 enters into the overload protection in real time. Obviously, this process can be implemented by multiplexing the original temperature sensor of the air conditioner 100 without adding additional hardware cost to the air conditioner 100.
As an embodiment, the above-mentioned manner for predicting whether the compressor 20 of the air conditioner 100 starts overload protection according to the estimated temperature difference includes one or a combination of the following:
1) and judging whether the evaluation temperature difference does not exceed a limit value. For example, it is determined whether the estimated temperature difference does not exceed a preset second temperature threshold. For reference, the second temperature threshold may range from 0 ℃ to 4 ℃.
2) And judging whether the evaluation temperature difference changes less than the previously collected evaluation temperature difference. For example, it is checked whether the collected evaluation temperature difference becomes smaller.
One way to implement step S102 described above is listed below. Specifically, as shown in fig. 4, the step S102 includes the following sub-steps:
and a substep S1021, taking the newly collected estimated temperature difference as a target temperature difference at each time interval.
In the embodiment of the invention, in each time interval, the estimated temperature difference newly acquired in the current time interval is used as the target temperature difference.
In the substep S1022, if the target temperature difference does not exceed the preset second temperature threshold, a comparative temperature difference corresponding to the target temperature difference is obtained.
In an embodiment of the present invention, the comparison temperature difference is an estimated temperature difference whose acquisition time is earlier than the target temperature difference. That is, it may be that the evaluation temperature difference arranged before the target temperature difference in the temperature difference sequence is taken as the comparison temperature difference. For example, the first estimated temperature difference listed in the temperature difference sequence updated according to the target temperature difference is used as the corresponding comparison temperature difference.
In other embodiments, the comparison temperature difference may be an average value between temperature differences other than the target temperature difference in the temperature difference sequence.
And a substep S1023 of prejudging whether the compressor 20 of the air conditioner 100 starts overload protection according to the comparison temperature difference and the target temperature difference.
It is understood that the estimated temperature difference may be obtained by comparing the difference between the temperature difference and the target temperature difference to obtain a change from the previous value, and if the estimated temperature difference becomes smaller than the previous value, it may be predicted that the overload protection of the compressor 20 is activated. As an embodiment, when the difference between the comparison temperature difference and the target temperature difference is not lower than the preset third temperature threshold, it is determined in advance that the compressor 20 has started the overload protection, and the process proceeds to step S103. Otherwise, the flow returns to sub-step S1021. For reference, the third temperature threshold may have a value ranging from 2 ℃ to 5 ℃.
For example, Δ T12 in the updated temperature difference sequence is the target temperature difference, the second temperature threshold is 1 ℃, the third temperature threshold is 2 ℃, after detecting that Δ T12 is equal to or less than 1 ℃, Δ T1 in the updated temperature difference sequence is determined to be the comparison temperature difference, when Δ T1- Δ T12 are equal to or more than 2 ℃, it is predetermined that the compressor 20 has started the overload protection, and the process then proceeds to step S103.
In step S103, if it is determined in advance that the overload protection of the compressor 20 is started, the operation of the inner fan 30 of the air conditioner 100 is controlled to stop.
In the embodiment of the present invention, in order to determine whether the predetermined result that the compressor 20 has started the overload protection is accurate, the control unit 10 sends a stop instruction to the inner fan 30, so that the inner fan 30 receiving the stop instruction stops working.
And step S104, after the inner fan 30 stops running for a specified time, evaluating whether to increase the recorded overload protection times according to the newly acquired evaluation temperature difference.
In the embodiment of the present invention, the overload protection number value is the number of times that the overload protection has occurred to the compressor 20 recorded in the control unit 10. After the internal fan 30 stops operating for a specified time, whether the compressor 20 has started the overload protection is further determined according to the newly collected evaluation temperature difference, and the number of times of the overload protection recorded in the control unit 10 is adjusted according to the determination result. The specified time period may be preset by the user, for example, 60 seconds.
As an embodiment, the step S104 may include:
1) and judging whether the newly acquired evaluation temperature difference after the specified time meets a preset condition.
In the embodiment of the present invention, the preset condition may be a condition for determining whether the evaluation temperature difference does not change much after the internal air stops.
Optionally, the step of judging whether the newly acquired evaluation temperature difference after the specified time length meets a preset condition includes: and taking the newly acquired evaluation temperature difference as a target temperature difference. Acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference. It is understood that the principle of obtaining the comparison temperature difference of the target temperature difference is the same as the substep S1022, and will not be described herein. And if the difference value between the target temperature difference and the comparison temperature difference is not higher than a preset first temperature threshold value, judging that the evaluation temperature difference meets a preset condition. For reference, the first temperature threshold may be set to a value ranging from 0 ℃ to 2 ℃.
2) And if the estimated temperature difference meets the preset condition, increasing the overload protection number value. For example, after the inner fan 30 stops operating for a specified time, if the newly acquired evaluation temperature meets the preset condition, the overload protection number is increased by one.
3) And if the evaluation temperature difference does not meet the preset condition, not increasing the recorded overload protection times.
It is understood that the operation of the inner fan 30 is controlled to stop by step S103, and it is further determined whether the overload protection actually occurs by step S104. The overload protection misjudgment caused by the inner fan 30 can be discharged, and the accuracy of the overload protection judgment is improved.
It is understood that if it is determined that the pre-determined overload protection is a misjudgment due to the inner fan 30, the number of times of overload protection recorded in the control unit 10 is not changed. Further, the air conditioner overload protection judgment method provided by the embodiment of the invention further comprises the following steps: and if the newly acquired evaluation temperature difference does not meet the preset condition after the specified time, controlling the inner fan 30 to recover to operate, so that the air conditioner 100 recovers to operate normally.
In addition, the failure of the protector is mostly affected by frequent overload trips within a short time. To distinguish whether frequent trip of the air conditioner 100 occurs. The air conditioner overload protection judging method provided by the embodiment of the invention can further comprise the following steps: and when the normal operation time of the compressor 20 exceeds the preset time, resetting the overload protection time value. For example, if the preset time is 1 hour, the compressor 20 does not have overload protection for 1 hour, and the recorded number of times of overload protection is cleared.
In some embodiments, as shown in fig. 5, on the basis of the air conditioner overload protection determining method shown in fig. 2, the air conditioner overload protection determining method provided in the embodiments of the present invention further includes:
and step S105, controlling the outdoor unit of the air conditioner 100 to stop when the overload protection times exceed the preset threshold value.
In the present embodiment, when it is determined in step S104 that the number of times of recorded overload protection needs to be increased, the flow proceeds to step S105. When it is determined in step S104 that the number of recorded overload protections does not need to be increased, the flow returns to step S101. The preset threshold may be determined according to test data of different models, and may be, for example, 6. In the embodiment of the present invention, when the recorded number of times of overload protection exceeds the preset threshold, it is determined that the overload protection of the compressor 20 has failed, and the outdoor unit of the air conditioner 100 is controlled to stop. Meanwhile, the user can be prompted. At this time, the shutdown of the outdoor unit is continued until the air conditioner 100 is restarted. Thus, the air conditioner 100 can be effectively protected when the protector of the compressor 20 may fail.
Because the recorded overload protection times are obtained by repeated judgment, the reliability and the accuracy are higher. Therefore, the step S105 can avoid unnecessary shutdown, which affects the user experience.
And S106, when the overload protection number value does not exceed the preset threshold value, judging whether to control the inner fan 30 to recover to operate or not according to the newly acquired evaluation temperature difference.
In the embodiment of the invention, the newly acquired estimated temperature difference can be used as the target temperature difference, and the comparison temperature difference of the target temperature difference can be obtained. When the difference between the target temperature difference and the comparison temperature difference is not less than the fourth temperature threshold, it is determined that the overload protection of the compressor has been released at this time, and the normal operation is resumed, so that the inner fan 30 is controlled to resume the operation, and the process returns to step S101.
For reference, the value of the fourth temperature threshold ranges from 2 ℃ to 5 ℃.
In order to perform the corresponding steps in the above embodiments and various possible manners, an implementation manner of the air conditioner overload protection determining apparatus 300 is given below, and optionally, the air conditioner overload protection determining apparatus 300 may adopt a device structure of the air conditioner 100. Further, referring to fig. 6, fig. 6 is a functional block diagram of an air conditioner overload protection and determination apparatus 300 according to an embodiment of the present invention. It should be noted that the basic principle and the generated technical effect of the air conditioner overload protection determining apparatus 300 provided in the present embodiment are the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiments. The air conditioner overload protection judging device 300 includes: an obtaining module 301, a pre-judging module 302, a control module 303 and an evaluating module 304.
The obtaining module 301 is configured to obtain the indoor temperature and the indoor coil temperature collected according to a preset time interval, so as to obtain an evaluation temperature difference corresponding to each time interval.
In an embodiment of the present invention, the step S101 may be executed by the obtaining module 301.
The prejudging module 302 is configured to prejudge whether the compressor 20 of the air conditioner 100 starts overload protection according to the estimated temperature difference; and the evaluation temperature difference is a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval.
In an embodiment of the present invention, the step S102 may be executed by the pre-judging module 302.
The control module 303 is configured to control the internal fan 30 of the air conditioner 100 to stop operating within a specified time period if it is determined that the compressor 20 has started overload protection.
In an embodiment of the present invention, the step S103 may be executed by the control module 303.
The evaluation module 304 is configured to evaluate whether to increase an overload protection time value according to the newly acquired evaluation temperature difference after the inner fan 30 stops operating for the specified time, so as to control the outdoor unit of the air conditioner 100 to stop when the overload protection time value exceeds a preset threshold.
In an embodiment of the present invention, the step S104 may be executed by the evaluation module 304.
In summary, the embodiments of the present invention provide an air conditioner overload protection determination method and apparatus, and an air conditioner. The air conditioner overload protection judging method comprises the following steps: judging whether the compressor of the air conditioner starts overload protection or not in advance according to the evaluation temperature difference; the evaluation temperature difference is a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval; if the compressor is judged to be started to carry out overload protection in advance, controlling an internal fan of the air conditioner to stop running within a specified time; and after the inner fan stops running for the specified time, evaluating whether to increase the recorded overload protection number value according to the newly acquired evaluation temperature difference so as to control the outdoor unit of the air conditioner to stop when the overload protection number value exceeds a preset threshold value. The accurate and reliable overload times of the compressor are obtained through double judgment. Therefore, the air conditioner can be helped to decide whether to shut down or not in time, and the service life of the compressor is guaranteed.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. An air conditioner overload protection judging method is characterized by comprising the following steps:
pre-judging whether the compressor (20) of the air conditioner (100) starts overload protection or not according to the evaluation temperature difference; the evaluation temperature difference comprises a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval;
if the compressor (20) is judged to be started to carry out overload protection in advance, controlling an inner fan (30) of the air conditioner (100) to stop running;
after the inner fan (30) stops running for a specified time, evaluating whether to increase the recorded overload protection number value according to the newly acquired evaluation temperature difference so as to control an outdoor unit of the air conditioner (100) to stop when the overload protection number value exceeds a preset threshold value;
wherein the step of evaluating whether to increase the recorded number of times of overload protection according to the newly acquired evaluation temperature difference comprises: taking the newly acquired evaluation temperature difference as a target temperature difference; acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference; if the difference value between the target temperature difference and the comparison temperature difference is not higher than a preset first temperature threshold value, judging that the evaluation temperature difference meets a preset condition;
if the evaluation temperature difference meets the preset condition, increasing the recorded overload protection times;
and if the evaluation temperature difference does not meet the preset condition, not increasing the recorded overload protection times.
2. The air conditioner overload protection judging method according to claim 1, further comprising:
and if the newly acquired evaluation temperature difference after the specified time does not meet the preset condition, controlling the inner fan (30) to resume running.
3. The air conditioner overload protection judging method according to claim 1, wherein the step of prejudging whether the compressor (20) of the air conditioner (100) starts overload protection or not according to the evaluation temperature difference comprises:
taking the newly acquired evaluation temperature difference as a target temperature difference at each time interval;
if the target temperature difference does not exceed a preset second temperature threshold value, acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference;
and pre-judging whether the compressor (20) of the air conditioner (100) starts overload protection or not according to the comparison temperature difference and the target temperature difference.
4. The air conditioner overload protection judging method according to claim 3, wherein the step of prejudging whether the compressor (20) of the air conditioner (100) starts overload protection or not according to the comparison temperature difference and the target temperature difference comprises:
and when the difference value between the comparison temperature difference and the target temperature difference is not lower than a preset third temperature threshold value, judging that the compressor (20) of the air conditioner (100) is started to carry out overload protection in advance.
5. The air conditioner overload protection judging method according to claim 1, wherein after increasing the recorded number of times of overload protection, the air conditioner overload protection judging method further comprises:
and if the overload protection times do not exceed the preset threshold value, judging whether to start the inner fan (30) according to the newly acquired evaluation temperature difference.
6. The air conditioner overload protection judging method according to claim 5, wherein the step of judging whether to turn on the inner fan (30) according to the newly collected evaluation temperature difference comprises:
taking the newly acquired evaluation temperature difference as a target temperature difference;
acquiring a comparison temperature difference corresponding to the target temperature difference;
and if the difference value between the target temperature difference and the comparison temperature difference is not less than a fourth temperature threshold value, controlling the inner fan (30) to recover to operate.
7. The air conditioner overload protection judging method according to claim 1, 3 or 6,
the air conditioner overload protection judging method further comprises the following steps: sequentially storing the collected evaluation temperature differences according to a collection time sequence to generate a temperature difference sequence; updating the temperature difference sequence according to the newly acquired evaluation temperature difference in each time interval;
the step of obtaining the comparison temperature difference corresponding to the target temperature difference comprises the following steps: and taking the evaluation temperature difference listed at the head in the updated temperature difference sequence as the comparison temperature difference.
8. The air conditioner overload protection and judgment method according to claim 7, wherein the step of updating the temperature difference sequence according to the newly collected evaluation temperature difference comprises the steps of:
and when the number of the temperature differences in the temperature difference sequence reaches a preset number threshold value, adding the newly acquired evaluation temperature difference into the temperature difference sequence, and deleting the evaluation temperature difference listed at the head of the temperature difference sequence.
9. The air conditioner overload protection judging method according to claim 1, further comprising:
and when the normal operation time of the compressor (20) exceeds the preset time, clearing the overload protection time value.
10. An air conditioner overload protection judging device, characterized in that the air conditioner overload protection judging device (300) comprises:
the pre-judging module (302) is used for pre-judging whether the compressor (20) of the air conditioner (100) starts overload protection or not according to the evaluation temperature difference; the evaluation temperature difference is a temperature difference value between the indoor temperature and the indoor coil temperature collected according to a preset time interval;
the control module (303) is used for controlling an internal fan (30) of the air conditioner (100) to stop running if the compressor (20) is judged to be started to carry out overload protection in advance;
the evaluation module (304) is used for evaluating whether a recorded overload protection times value is increased or not according to the newly acquired evaluation temperature difference after the inner fan (30) stops running for a specified time so as to control the outdoor unit of the air conditioner (100) to stop when the overload protection times value exceeds a preset threshold value;
wherein the evaluation module (304) is further configured to: taking the newly acquired evaluation temperature difference as a target temperature difference; acquiring a comparison temperature difference corresponding to the target temperature difference; the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference with the acquisition time earlier than the target temperature difference; if the difference value between the target temperature difference and the comparison temperature difference is not higher than a preset first temperature threshold value, judging that the evaluation temperature difference meets a preset condition;
if the evaluation temperature difference meets the preset condition, increasing the recorded overload protection times;
and if the evaluation temperature difference does not meet the preset condition, not increasing the recorded overload protection times.
11. An air conditioner comprising a processor executable by a machine to perform the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713731.3A CN110398022B (en) | 2019-08-02 | 2019-08-02 | Air conditioner overload protection judgment method and device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713731.3A CN110398022B (en) | 2019-08-02 | 2019-08-02 | Air conditioner overload protection judgment method and device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110398022A CN110398022A (en) | 2019-11-01 |
| CN110398022B true CN110398022B (en) | 2020-07-31 |
Family
ID=68327192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910713731.3A Active CN110398022B (en) | 2019-08-02 | 2019-08-02 | Air conditioner overload protection judgment method and device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110398022B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779161B (en) * | 2019-11-18 | 2021-08-27 | 宁波奥克斯电气股份有限公司 | Control method and device for compressor overload protection and air conditioner |
| CN112032930B (en) * | 2020-08-17 | 2021-07-20 | 珠海格力电器股份有限公司 | Compressor protection method and device, storage medium and electronic equipment |
| CN112303820B (en) * | 2020-09-18 | 2022-04-15 | 珠海格力电器股份有限公司 | Overload protection detection control method, computer readable storage medium and air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015058666A1 (en) * | 2013-10-24 | 2015-04-30 | 珠海格力电器股份有限公司 | Compressor overload-protection control method and device |
| CN106150999A (en) * | 2016-07-04 | 2016-11-23 | 珠海格力电器股份有限公司 | Overload of compressor protection detection, the method and device controlled |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007085659A (en) * | 2005-09-22 | 2007-04-05 | Matsushita Electric Ind Co Ltd | Controller for air conditioner |
| CN101566517B (en) * | 2009-05-26 | 2010-11-17 | 宁波奥克斯电气有限公司 | Method for judging refrigerant leakage of air-conditioner |
| CN107477778B (en) * | 2017-08-11 | 2019-10-18 | 宁波奥克斯电气股份有限公司 | Air-conditioning heating lacks fluorine protection and prevents the control method of high frequent overload protection |
| CN107747790B (en) * | 2017-09-29 | 2019-11-05 | 青岛海尔空调器有限总公司 | A kind of protection control method and device of air-conditioning |
| CN108088055A (en) * | 2017-12-19 | 2018-05-29 | 海信（广东）空调有限公司 | Control method for frequency conversion air conditioner and device |
| 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 |
-
2019
- 2019-08-02 CN CN201910713731.3A patent/CN110398022B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015058666A1 (en) * | 2013-10-24 | 2015-04-30 | 珠海格力电器股份有限公司 | Compressor overload-protection control method and device |
| CN106150999A (en) * | 2016-07-04 | 2016-11-23 | 珠海格力电器股份有限公司 | Overload of compressor protection detection, the method and device controlled |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110398022A (en) | 2019-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110398022B (en) | Air conditioner overload protection judgment method and device and air conditioner | |
| CN108613335B (en) | Fault detection method and device of air conditioner, storage medium and processor | |
| US20090225479A1 (en) | Compressor Protection and Grid Fault Detection Device | |
| US8151585B2 (en) | System and method of disabling an HVAC compressor based on a low pressure cut out | |
| WO2022227611A1 (en) | Uploading frequency control method and apparatus for air conditioning unit data, and air conditioning system | |
| CN111273176B (en) | Fault diagnosis optimization method, device, system and storage medium | |
| US10228174B2 (en) | Compressor over-load protection control method and apparatus | |
| CN110887292A (en) | Refrigerator compartment temperature control method, refrigerator and storage medium | |
| CN107655173B (en) | Operation control method, operation control device, air conditioning system and computer readable storage medium | |
| EP3726157B1 (en) | Air-conditioning system, remote controller, and method for saving a history of operation data of an air conditioner | |
| CN110762901B (en) | Auxiliary oil return control method and device and air conditioner | |
| CN113028588B (en) | Fault protection method and system for compressor | |
| CN102323505A (en) | Device and method for supporting life prediction and failure cause analysis of optical device | |
| JP2018022650A (en) | Method for controlling secondary battery | |
| US20090255281A1 (en) | Diagnostic Method for Proper Refrigerant Valve Operation | |
| CN102679495A (en) | Compensation starting method of air conditioner | |
| CN111023449A (en) | Snow removal control method and device and air conditioner | |
| JP2007241572A (en) | Facility monitoring system | |
| CN115899366A (en) | Fault early warning method, device, equipment and storage medium of pressure control electromagnetic valve | |
| CN108446162B (en) | Method and system for monitoring JVM Full GC event | |
| US20100080712A1 (en) | System and Method of Disabling an HVAC Compressor Based on a High Pressure Cut Out | |
| CN108131776B (en) | Air conditioner fluorine deficiency protection method and air conditioner | |
| CN110617606A (en) | Air conditioner and control method and system thereof | |
| JP5473139B2 (en) | Test equipment and test method | |
| CN112446980B (en) | Enhanced component fault diagnosis method for providing minimum probability fault |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |