CN110398022A - Air conditioner overload protection judging method, device and air conditioner - Google Patents

Abstract

Embodiments of the present invention provide an air conditioner overload protection judging method, device and air conditioner, which relate to the technical field of air conditioners. Wherein, the method for judging the overload protection of the air conditioner includes: predicting whether the compressor of the air conditioner starts the overload protection according to the evaluated temperature difference; wherein, the evaluated temperature difference is the temperature difference between the indoor temperature and the indoor coil temperature collected according to the preset time interval value; if it is predicted that the compressor has activated overload protection, the internal fan of the air conditioner will be controlled to stop running; after the internal fan stops running for a specified period of time, it will be evaluated whether to increase the recorded value of overload protection times based on the newly collected evaluation temperature difference, so that when the overload When the number of protection times exceeds a preset threshold, the outdoor unit controlling the air conditioner is shut down. Accurate and reliable compressor overload times are obtained through double determination, which is convenient for the air conditioner to make a timely decision whether to use shutdown protection to ensure the service life of the compressor and avoid compressor damage.

Description

Air conditioner overload protection judging method, device and air conditioner

technical field

The invention relates to the technical field of air conditioners, in particular to an air conditioner overload protection judging method and device and an air conditioner.

Background technique

If the air conditioner is continuously operated at high load, there is a risk of burning out the compressor. However, under severe operating conditions (such as low voltage, dirty condenser, refrigerant leakage, etc.), it is difficult for a fixed-frequency air conditioner that cannot actively unload to avoid entering a state of continuous high-load operation.

In order to protect the compressor, a protector is usually installed on the compressor. The protector adopts the method of disconnecting when the temperature of the compressor coil exceeds the normal use range to stop the compressor, and closing when the compressor coil temperature falls within the normal use range to make the compressor work normally to achieve the effect of protecting the compressor. However, the protection times of the protector are limited, and frequent overload protection can easily cause the protector to fail, so the compressor will be damaged. In addition, due to cost considerations, the structure of the protector is simple, and it is usually difficult to obtain the number of overload protections achieved from the protector.

Therefore, without adding additional hardware configuration, it is very important to accurately identify that the number of protection times of the protector exceeds the limit, so as to control the shutdown of the air conditioner in time, which is very important for prolonging the life of the compressor and the protector.

Contents of the invention

The problem solved by the invention is to accurately identify the protection times of the protector without adding additional hardware configuration, so as to control the air conditioner to stop running in time.

In order to solve the above problems, an embodiment of the present invention provides a method for judging the overload protection of an air conditioner. The method for judging the overload protection of an air conditioner includes: predicting whether the compressor of the air conditioner will start the overload protection based on the evaluated temperature difference; wherein the evaluated temperature difference includes: The temperature difference between the indoor temperature and the indoor coil temperature collected according to the preset time interval; if the overload protection of the compressor is predicted, the internal fan of the air conditioner is controlled to stop running; After stopping for a specified period of time, evaluate whether to increase the recorded value of overload protection times according to the newly collected estimated temperature difference, so as to control the outdoor unit of the air conditioner to stop when the value of overload protection times exceeds a preset threshold. That is, after using the estimated temperature difference to predict the occurrence of overload protection, stop the internal fan, judge again whether overload protection occurs, and adjust the number of times of overload protection according to the judgment result. Through the cooperation of multiple judgments, the obtained value of the number of overload protection times is more reliable and accurate, which facilitates timely decision-making of the air conditioner for shutdown protection, and ensures the service life of the compressor. At the same time, unnecessary hardware equipment is not added, effectively controlling costs.

In an optional implementation manner, the step of evaluating whether to increase the recorded value of the overload protection times according to the newly collected evaluation temperature difference includes: judging whether the newly collected evaluation temperature difference after the specified time period satisfies a preset condition; If the estimated temperature difference satisfies the preset condition, the recorded value of the number of overload protection times is increased; if the estimated temperature difference does not meet the preset condition, the recorded value of the number of overload protection times is not increased. After the internal fan is stopped, the judgment is made again based on the estimated temperature difference, so as to eliminate possible misjudgments during prediction.

In an optional implementation manner, the step of judging whether the newly collected evaluation temperature difference meets a preset condition after the specified time period includes: taking the newly collected evaluation temperature difference as a target temperature difference; obtaining the target temperature difference corresponding to The comparison temperature difference; wherein, the comparison temperature difference is a temperature difference value determined according to the evaluation temperature difference whose collection time is earlier than the target temperature difference; if the difference between the target temperature difference and the comparison temperature difference is not higher than the preset first a temperature threshold, it is determined that the estimated temperature difference satisfies a preset condition.

In an optional embodiment, the method for judging the overload protection of the air conditioner further includes: if the newly collected estimated temperature difference does not meet a preset condition after the specified time period, controlling the internal fan to resume operation. Avoid unnecessary downtime caused by misjudgment and improve user experience.

In an optional 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 collected estimated temperature difference as the target temperature difference at each of the time intervals ; If the target temperature difference does not exceed the preset second temperature threshold, obtain a comparison temperature difference corresponding to the target temperature difference; wherein, the comparison temperature difference is a temperature difference value determined based on an evaluation temperature difference whose collection time is earlier than the target temperature difference; According to the comparison temperature difference and the target temperature difference, it is predicted whether the compressor of the air conditioner starts overload protection. Thus, a preliminary overload protection judgment is realized.

In an optional embodiment, according to the comparison temperature difference and the target temperature difference, the step of predicting whether the compressor of the air conditioner starts overload protection includes: when the difference between the comparison temperature difference and the target temperature difference is less than When it is lower than the preset third temperature threshold, it is predicted that the compressor of the air conditioner has activated overload protection.

In an optional embodiment, after increasing the recorded value of the number of overload protection times, the method for judging the overload protection of the air conditioner further includes: if the value of the number of overload protection times does not exceed the preset threshold, according to the newly collected The evaluated temperature difference determines whether to turn on the internal fan.

In an optional embodiment, the step of judging whether to turn on the internal fan according to the newly collected estimated temperature difference includes: taking the newly collected estimated temperature difference as a target temperature difference; temperature difference; if the difference between the target temperature difference and the comparison temperature difference is not less than a fourth temperature threshold, control the internal fan to resume operation.

In an optional embodiment, the method for judging the overload protection of the air conditioner further includes the step of: sequentially storing the collected estimated temperature differences in order of collection time to generate a sequence of temperature differences; The collected estimated temperature difference updates the temperature difference sequence; the step of acquiring the comparative temperature difference corresponding to the target temperature difference includes: taking the evaluated temperature difference listed first in the updated temperature difference sequence as the comparative temperature difference.

In an optional embodiment, the step of updating the temperature difference sequence according to the newly collected estimated temperature difference includes: when the number of temperature differences in the temperature difference sequence reaches a preset number threshold, the newly collected The estimated temperature difference is added to the temperature difference sequence, and the estimated temperature difference listed first in the temperature difference sequence is deleted.

In an optional embodiment, the method for judging the overload protection of the air conditioner further includes: when the normal operating time of the compressor exceeds a preset time, clearing the value of the number of times of overload protection to zero.

In the second aspect, an embodiment of the present invention provides an air conditioner overload protection judging device, the air conditioner overload protection judging device includes: a pre-judgment module, used to predict whether the compressor of the air conditioner starts overload protection according to the evaluated temperature difference; wherein, The estimated temperature difference is the temperature difference between the indoor temperature and the indoor coil temperature collected according to a preset time interval; the control module is used to control the air conditioner if it is predicted that the compressor has activated overload protection. The internal fan stops running; the evaluation module is used to evaluate whether to increase the recorded overload protection times value according to the newly collected evaluation temperature difference after the internal fan stops running for a specified period of time, so that when the overload protection times value exceeds the preset When the threshold is reached, the outdoor unit controlling the air conditioner is shut down.

In a third aspect, an embodiment of the present invention provides an air conditioner, including a processor, and the processor can execute machine-executable instructions to implement the method described in any one of the foregoing implementation manners.

Description of drawings

Fig. 1 is the schematic diagram of the air conditioner that the embodiment of the present invention provides;

Fig. 2 is one of the step flow charts of an air conditioner overload protection judging method provided by an embodiment of the present invention;

Fig. 3 is the second flowchart of steps of an air conditioner overload protection judging method provided by an embodiment of the present invention;

Fig. 4 is the sub-step flowchart of step S102 in Fig. 2;

Fig. 5 is the third step flowchart of an air conditioner overload protection judging method provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of an air conditioner overload protection judging device provided by an embodiment of the present invention.

Explanation of reference signs:

100-air conditioner; 10-control unit; 20-compressor; 30-inner fan; 40-acquisition unit; 300-air conditioner overload protection judgment device; 301-acquisition module; 302-prediction module; 303-control module; 304 - Evaluation module.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , which shows a schematic diagram of an air conditioner 100 according to an embodiment of the present invention. The above-mentioned air conditioner 100 includes a control unit 10 , a compressor 20 , an internal fan 30 and a collection unit 40 . The above-mentioned control unit 10 is respectively used for electrical connection of the compressor 20 , the internal fan 30 and the collection unit 40 .

Optionally, the above-mentioned control unit 10 includes a processor and a memory, 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 internal fan 30 and the acquisition unit 40 implement the method for judging the overload protection of the air conditioner provided by the embodiment of the present invention. In other embodiments, the memory can also be a device independent of the control unit 10. By being electrically connected to the control unit 10, it is convenient for the processor to execute the machine-executable instructions stored in the memory to control the compressor 20, the internal fan 30 and The acquisition unit 40 implements the air conditioner overload protection judging method provided by the embodiment of the present invention.

The acquisition unit 40 mentioned above may be a temperature sensor. The above-mentioned temperature sensor includes a sensor for collecting indoor temperature and a sensor for collecting indoor coil temperature. It can be understood that the above temperature sensor can reuse the original sensor of the air conditioner 100 .

The above-mentioned compressor 20 has its own protector, and when the temperature of the coil of the compressor 20 exceeds the normal range due to the high-load operation of the air conditioner 100, the above-mentioned protector is automatically disconnected, so that the compressor 20 stops running. When the temperature of the coil of the compressor 20 returns to normal, the above-mentioned protector is automatically engaged to make the compressor 20 resume operation. In this way, the compressor 20 is prevented from burning out due to continuous high-load operation of the air conditioner 100 . Of course, as shown above, the number of times the protector can achieve overload protection is limited. Especially, under severe working conditions, the protector is repeatedly disconnected and closed at high frequency, which will inevitably cause the protector to fail.

Please refer to FIG. 2 , which shows a flow chart of the method for judging the overload protection of the air conditioner applied to the control unit 10 . As shown in FIG. 2, the method for judging the overload protection of the air conditioner includes the following steps:

In step S101, the indoor temperature and the indoor coil temperature collected at preset time intervals are obtained, so as to obtain an estimated temperature difference corresponding to each time interval.

In the embodiment of the present invention, the aforementioned indoor temperature is the real-time temperature of the indoor space served by the air conditioner 100 . The above-mentioned indoor coil temperature may be a coil temperature of an indoor evaporator. Optionally, 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 the estimated temperature difference corresponding to the time interval is obtained 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 this time interval. It can be 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 uses the difference between the received indoor temperature and the indoor coil temperature as the estimated temperature difference collected in this round. It can be understood that when the air conditioner 100 starts to run, the control unit 10 starts to acquire the indoor temperature and the indoor coil temperature collected at each time interval. In some embodiments, after the compressor runs for a set period of time, the process enters step S102 to start monitoring whether the compressor trips due to overload protection.

The above collection and evaluation of the temperature difference is collected in real time, and the amount of data gradually increases with time. In order to facilitate the management of the collected estimated temperature difference, reduce the storage pressure and reduce the performance requirements for the memory, in some embodiments, as shown in Figure 3, on the basis of Figure 2, the method for judging the overload protection of the air conditioner may also include step:

In step S201, the collected estimated temperature differences are sequentially stored in order of collection time, so as 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 evaluated temperature difference values in it according to the first-in-first-out principle, thereby forming a temperature difference sequence. It can be understood that, in the temperature difference sequence, the collection time corresponding to the evaluation temperature difference arranged in the front is relatively early, and the collection time corresponding to the evaluation temperature difference arranged in the rear is relatively later.

Step S202, within each time interval, update the temperature difference sequence according to the newly collected estimated temperature difference.

In the embodiment of the present invention, the above-mentioned manner of updating the temperature difference sequence may be: a new estimated temperature difference is obtained in each time interval, and then added to the temperature difference sequence. If the number of temperature differences in the temperature difference sequence reaches a preset number threshold, add the newly collected estimated temperature difference to the temperature difference sequence, and delete the estimated temperature difference listed first in the temperature difference sequence. For example, the number threshold of temperature difference series is 12 and 12 estimated temperature differences have been stored, which are respectively recorded as ΔT1, ΔT2...ΔT12. When the 13th estimated temperature difference is collected, the original ΔT1 is removed from the temperature difference sequence, the original ΔT2 is used as the updated ΔT1, the original ΔT3 is used as the updated ΔT2, and so on, and finally the newly collected Evaluate the temperature difference as ΔT12.

Step S102 , according to the estimated temperature difference, it is predicted whether the compressor 20 of the air conditioner 100 starts overload protection.

In the embodiment of the present invention, an evaluation temperature difference is newly collected in each time interval. Every time an estimated temperature difference is obtained, it is determined whether the compressor 20 has activated overload protection according to the estimated temperature difference. That is, through the cooperation of step S101 and step S102, real-time monitoring of whether the air conditioner 100 enters overload protection can be realized. Obviously, this process can be realized by reusing the original temperature sensor of the air conditioner 100 without additional hardware cost of the air conditioner 100 .

As an implementation, the above-mentioned judging method for predicting whether the compressor 20 of the air conditioner 100 starts overload protection based on the estimated temperature difference includes one or a combination of the following:

1) Judging whether the evaluation temperature difference does not exceed the limit. For example, it is judged whether the evaluated temperature difference does not exceed the preset second temperature threshold. For reference, the value range of the second temperature threshold may be 0°C to 4°C.

2) Judging whether the change of the evaluated temperature difference is smaller than the previously collected evaluated temperature difference. For example, check whether the collected evaluation temperature difference gradually decreases.

One way to realize the above step S102 is listed below. Specifically, as shown in Figure 4, the above step S102 includes the following sub-steps:

Sub-step S1021, at each time interval, use the newly collected evaluation temperature difference as the target temperature difference.

In the embodiment of the present invention, in each time interval, the evaluation temperature difference newly collected in the current time interval is used as the target temperature difference.

Sub-step S1022, if the target temperature difference does not exceed the preset second temperature threshold, obtain a comparative temperature difference corresponding to the target temperature difference.

In the embodiment of the present invention, the above-mentioned comparison temperature difference is an evaluation temperature difference whose collection time is earlier than the target temperature difference. That is, the evaluation temperature difference arranged before the target temperature difference in the temperature difference sequence may be used as the comparison temperature difference. For example, the estimated temperature difference listed first in the temperature difference sequence updated based on the target temperature difference is used as the corresponding comparison temperature difference.

In other embodiments, the average value among other temperature differences in the temperature difference sequence except the target temperature difference may also be used as the comparison temperature difference.

Sub-step S1023, according to the comparison temperature difference and the target temperature difference, predict whether the compressor 20 of the air conditioner 100 starts overload protection.

It can be understood that by comparing the difference between the temperature difference and the target temperature difference, the change of the estimated temperature difference compared with the previous one can be obtained. If the estimated temperature difference gradually decreases compared with the previous one, it can be predicted that the compressor 20 has activated overload protection. As an implementation manner, when the difference between the comparison temperature difference and the target temperature difference is not lower than the preset third temperature threshold, it is predicted that the compressor 20 has activated overload protection, and the process enters step S103. Otherwise, the process returns to sub-step S1021. As a reference, the above-mentioned third temperature threshold may range from 2°C to 5°C.

For example, ΔT12 in the updated temperature difference sequence is the target temperature difference, the second temperature threshold is 1°C, and the third temperature threshold is 2°C. After detecting that ΔT12≤1°C, determine that ΔT1 in the updated temperature difference sequence is the comparison temperature difference, then when ΔT1-ΔT12≥2°C, it is predicted that the compressor 20 has activated overload protection, and the process proceeds to step S103.

Step S103 , if it is predicted that the compressor 20 has activated the overload protection, the internal fan 30 of the air conditioner 100 is controlled to stop running.

In the embodiment of the present invention, in order to determine whether the pre-judgment result that the compressor 20 has activated the overload protection is correct, the control unit 10 sends a stop instruction to the internal fan 30, so that the internal fan 30 that receives the stop instruction stops working.

Step S104, after the internal fan 30 stops running for a specified period of time, evaluate whether to increase the recorded value of overload protection times according to the newly collected estimated temperature difference.

In the embodiment of the present invention, the above-mentioned number of times of overload protection is the number of times of overload protection of the compressor 20 recorded in the control unit 10 . After the internal fan 30 stops running for a specified period of time, it is further determined whether the compressor 20 has activated overload protection based on the newly collected estimated temperature difference, and the number of overload protection times recorded in the control unit 10 is adjusted according to the determination result. The specified duration may be preset by the user, for example, it may be 60 seconds.

As an implementation manner, the above step S104 may include:

1) Judging whether the newly collected evaluation temperature difference after the specified time period satisfies a preset condition.

In the embodiment of the present invention, the above preset condition may be a condition for judging and evaluating whether the temperature difference does not change much after the internal wind stops.

Optionally, the above-mentioned step of judging whether the newly collected evaluation temperature difference satisfies a preset condition after the specified time period includes: taking the newly collected evaluation temperature difference as a target temperature difference. Acquiring a comparison temperature difference corresponding to the target temperature difference; wherein, the comparison temperature difference is a temperature difference value determined according to an evaluation temperature difference whose acquisition time is earlier than the target temperature difference. Understandably, the principle of obtaining the comparative temperature difference of the target temperature difference here is the same as that of sub-step S1022, and will not be repeated here. If the difference between the target temperature difference and the comparison temperature difference is not higher than the preset first temperature threshold, it is determined that the evaluation temperature difference satisfies the preset condition. For reference, the above-mentioned first temperature threshold may range from 0°C to 2°C.

2) If the estimated temperature difference satisfies the above preset conditions, then increase the value of the number of overload protection times. For example, after the internal fan 30 stops running for a specified period of time, and the newly collected estimated temperature satisfies the preset condition, the value of the number of overload protection times is increased by one.

3) If the estimated temperature difference does not meet the above preset conditions, the recorded value of overload protection times will not be increased.

It can be understood that the first step S103 is used to control the internal fan 30 to stop running, and then step S104 is used to further determine whether the overload protection actually occurs. The misjudgment of overload protection caused by the internal fan 30 can be eliminated, and the accuracy of overload protection judgment can be improved.

Understandably, if it is determined that the predicted overload protection is a misjudgment caused by the internal fan 30 , then the value of the number of overload protection times recorded in the control unit 10 will not be changed. Further, the air conditioner overload protection judging method provided by the embodiment of the present invention further includes: if the newly collected estimated temperature difference does not meet the preset condition after a specified period of time, controlling the internal fan 30 to resume operation, so that the air conditioner 100 resumes normal operation.

In addition, the failure of the protector is mainly affected by frequent overload trips in a short period of time. In order to distinguish whether the air conditioner 100 frequently trips or not. The method for judging the overload protection of the air conditioner provided by the embodiment of the present invention may further include the step of: when the normal operation time of the compressor 20 exceeds a preset time, clearing the number of times of overload protection to zero. For example, if the preset duration is 1 hour, then the compressor 20 does not experience overload protection for 1 hour, then the recorded value of the number of overload protection times will be cleared.

In some embodiments, as shown in FIG. 5 , on the basis of the method for judging the overload protection of the air conditioner shown in FIG. 2 , the method for judging the overload protection of the air conditioner provided in the embodiments of the present invention further includes:

Step S105, when the number of overload protection times exceeds a preset threshold, the outdoor unit of the air conditioner 100 is controlled to stop.

In this embodiment, when it is determined in step S104 that the recorded number of overload protection times needs to be increased, the process proceeds to step S105. When it is determined in step S104 that there is no need to increase the recorded number of overload protection times, the process returns to step S101. The aforementioned preset threshold may be determined according to test data of different models, for example, it may be 6. In the embodiment of the present invention, when the recorded number of overload protection times exceeds the preset threshold, it is determined that the compressor 20 is in overload protection failure, and the outdoor unit of the air conditioner 100 is controlled to stop. At the same time, the user can also be prompted. At this time, the shutdown of the outdoor unit will continue until the air conditioner 100 is restarted. Therefore, when the protector of the compressor 20 may fail, the air conditioner 100 can be effectively protected.

Since the recorded value of overload protection times is obtained after repeated judgments, the reliability and accuracy are relatively high. Therefore, the above step S105 can avoid unnecessary downtime and affect user experience.

Step S106, when the number of overload protection times does not exceed the preset threshold, judge whether to control the internal fan 30 to resume operation according to the newly collected estimated temperature difference.

In the embodiment of the present invention, the newly collected evaluation temperature difference may be used as the target temperature difference, and a comparative temperature difference of the target temperature difference may 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 judged that the compressor has released the overload protection and resumed normal operation. Therefore, the internal fan 30 is controlled to resume operation, and the process returns to step S101.

For reference, the above-mentioned fourth temperature threshold ranges from 2°C to 5°C.

In order to implement the corresponding steps in the above embodiments and various possible ways, an implementation of the air conditioner overload protection judging device 300 is given below. Optionally, the air conditioner overload protection judging device 300 may adopt the device structure of the air conditioner 100 . Further, please refer to FIG. 6 , which is a functional block diagram of an air conditioner overload protection judging device 300 provided by an embodiment of the present invention. It should be noted that the basic principles and technical effects of the air conditioner overload protection judging device 300 provided in this embodiment are the same as those of the above-mentioned embodiments. Corresponding content in the embodiment. The air conditioner overload protection judgment device 300 includes: an acquisition module 301 , a prediction module 302 , a control module 303 and an evaluation module 304 .

The acquisition module 301 is configured to acquire the indoor temperature and the indoor coil temperature collected at preset time intervals, so as to obtain an estimated temperature difference corresponding to each time interval.

In the embodiment of the present invention, the above step S101 may be executed by the above obtaining module 301 .

The above prediction module 302 is used to predict whether the compressor 20 of the air conditioner 100 starts the overload protection according to the estimated temperature difference; temperature difference value.

In the embodiment of the present invention, the above-mentioned step S102 may be executed by the above-mentioned pre-judgment module 302 .

The above-mentioned control module 303 is configured to control the internal fan 30 of the air conditioner 100 to stop running within a specified time period if it is predicted that the compressor 20 has activated overload protection.

In the embodiment of the present invention, the above step S103 may be executed by the above control module 303 .

The evaluation module 304 is configured to evaluate whether to increase the number of overload protection times based on the newly collected estimated temperature difference after the internal fan 30 stops running for the specified time, so that when the number of overload protection times exceeds a preset threshold , controlling the outdoor unit of the air conditioner 100 to stop.

In the embodiment of the present invention, the above step S104 may be executed by the above evaluation module 304 .

In summary, the embodiments of the present invention provide an air conditioner overload protection judging method and device, and an air conditioner. Wherein, the method for judging the overload protection of the air conditioner includes: predicting whether the compressor of the air conditioner will start the overload protection according to the evaluated temperature difference; If it is predicted that the compressor has started overload protection, the internal fan of the air conditioner will be controlled to stop running within the specified time; after the internal fan stops running for the specified time, according to the newly collected Whether to increase the recorded value of the overload protection times in the evaluation temperature difference evaluation, so as to control the shutdown of the outdoor unit of the air conditioner when the overload protection times exceed a preset threshold. Accurate and reliable compressor overload times are obtained through double determination. Thereby, it can help the air conditioner decide whether to shut down in time, and guarantee the service life of the compressor.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (13)

1. a kind of air-conditioning overload protection judgment method, which is characterized in that the air-conditioning overload protection judgment method includes:

According to the assessment temperature difference, whether the compressor (20) of anticipation air conditioner (100) starts overload protection；Wherein, the assessment temperature Difference includes the temperature difference between the room temperature and indoor coil pipe acquired according to the preset time interval；

If prejudging the compressor (20) has been turned on overload protection, the inner blower (30) for controlling the air conditioner (100) stops Operation；

After the inner blower (30) specified duration out of service, assess whether to increase note according to the freshly harvested assessment temperature difference The overload protection time numerical value of record, to control the air conditioner (100) when the overload protection time numerical value is more than preset threshold Outdoor unit shut down.

2. air-conditioning overload protection judgment method according to claim 1, which is characterized in that according to the freshly harvested assessment The temperature difference assesses whether that the step of increasing the overload protection time numerical value of record includes:

Whether the freshly harvested assessment temperature difference meets preset condition after judging the specified duration；

If the assessment temperature difference meets the preset condition, increase the overload protection time numerical value of record；

If the assessment temperature difference is unsatisfactory for the preset condition, the overload protection time numerical value of record is not increased.

3. air-conditioning overload protection judgment method according to claim 2, which is characterized in that the judgement specified duration The step of whether the assessment temperature difference freshly harvested later meets preset condition include:

Using the freshly harvested assessment temperature difference as target temperature difference；

Obtain the corresponding relatively temperature difference of the target temperature difference；Wherein, the relatively temperature difference is according to acquisition time earlier than the mesh Mark the temperature difference that the assessment temperature difference of the temperature difference determines；

If difference of the target temperature difference compared with described between the temperature difference be not higher than preset first temperature threshold, determine described in The assessment temperature difference meets preset condition.

4. air-conditioning overload protection judgment method according to claim 2, which is characterized in that the air-conditioning overload protection judgement Method further include:

If the freshly harvested assessment temperature difference is unsatisfactory for preset condition after the specified duration, it is extensive to control the inner blower (30) Multiple operation.

5. air-conditioning overload protection judgment method according to claim 1, which is characterized in that described according to the assessment temperature Compressor (20) the step of whether starting overload protection of difference, anticipation air conditioner (100) includes:

In each time interval, using the freshly harvested assessment temperature difference as target temperature difference；

If the target temperature difference is no more than preset second temperature threshold value, the corresponding relatively temperature difference of the target temperature difference is obtained；Its In, the relatively temperature difference is according to acquisition time earlier than the temperature difference that the assessment temperature difference of the target temperature difference determines；

According to the relatively temperature difference and the target temperature difference, whether the compressor (20) of anticipation air conditioner (100), which starts overload, is protected Shield.

6. air-conditioning overload protection judgment method according to claim 5, which is characterized in that according to the relatively temperature difference and the institute State target temperature difference, the step of whether compressor (20) of anticipation air conditioner (100) starts overload protection includes:

When the difference relatively between the temperature difference and the target temperature difference is not less than preset third temperature threshold, air-conditioning is prejudged The compressor (20) of device (100) has been turned on overload protection.

7. air-conditioning overload protection judgment method according to claim 1, which is characterized in that in the overload for increasing record After protecting time numerical value, the air-conditioning overload protection judgment method further include:

If the overload protection time numerical value is less than the preset threshold, judge whether according to the new collected assessment temperature difference Open the inner blower (30).

8. air-conditioning overload protection judgment method according to claim 7, which is characterized in that the new collected institute of the foundation Commentary, which estimates the temperature difference it is determined whether to enable the step of inner blower (30), to include:

Using the freshly harvested assessment temperature difference as target temperature difference；

Obtain the corresponding relatively temperature difference of the target temperature difference；

If difference of the target temperature difference compared between the temperature difference is not less than four temperature thresholds, the inner blower (30) are controlled It resumes operation.

9. according to air-conditioning overload protection judgment method described in claim 3,5 or 8, which is characterized in that

The air-conditioning overload protection judgment method is further comprised the steps of: the collected assessment temperature difference according to acquisition time sequence It successively stores, to generate temperature difference sequence；In each time interval, according to described in the freshly harvested assessment temperature difference update Temperature difference sequence；

Described the step of obtaining the target temperature difference corresponding relatively temperature difference includes: that will be listed in the updated temperature difference sequence The first assessment temperature difference is as the relatively temperature difference.

10. air-conditioning overload protection judgment method according to claim 9, which is characterized in that described according to freshly harvested institute Commentary estimate the temperature difference update the temperature difference sequence the step of include:

When the temperature difference number in the temperature difference sequence reaches preset number threshold value, the freshly harvested assessment temperature difference is added The temperature difference sequence, and delete the assessment temperature difference for being listed in the temperature difference sequence first place.

11. air-conditioning overload protection judgment method according to claim 1, which is characterized in that the air-conditioning overload protection is sentenced Disconnected method further include:

When the compressor (20), which operate normally duration, is more than preset duration, the overload protection time numerical value is reset.

12. a kind of air-conditioning overload protection judgment means, which is characterized in that the air-conditioning overload protection judgment means (300) include:

It prejudges module (302), for according to the assessment temperature difference, whether the compressor (20) of anticipation air conditioner (100), which starts overload, to be protected Shield；Wherein, the assessment temperature difference is the temperature between the room temperature and indoor coil pipe acquired according to the preset time interval Difference；

Control module (303) controls the air conditioner if having been turned on overload protection for prejudging the compressor (20) (100) inner blower (30) is out of service；

Evaluation module (304) is used for after the inner blower (30) specified duration out of service, according to the freshly harvested assessment The temperature difference assesses whether to increase the overload protection time numerical value of record, so as to when the overload protection time numerical value is more than preset threshold, The outdoor unit for controlling the air conditioner (100) is shut down.

13. a kind of air conditioner, which is characterized in that including processor, machine-executable instruction is can be performed to realize in the processor Any method of claim 1-11.