CN109210732B - Over-temperature protection method and device for air conditioning unit, air conditioning unit and electronic equipment - Google Patents
Over-temperature protection method and device for air conditioning unit, air conditioning unit and electronic equipment Download PDFInfo
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- CN109210732B CN109210732B CN201810998087.4A CN201810998087A CN109210732B CN 109210732 B CN109210732 B CN 109210732B CN 201810998087 A CN201810998087 A CN 201810998087A CN 109210732 B CN109210732 B CN 109210732B
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- 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
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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
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- 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
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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Abstract
The invention provides an over-temperature protection method and device for an air conditioning unit, the air conditioning unit, electronic equipment and a storage medium. The over-temperature protection method of the air conditioning unit comprises the following steps: detecting the current temperature of a motor winding in the compressor; and when the current temperature does not exceed the preset protection temperature, controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature. In the embodiment of the invention, the temperature of the motor winding is controlled in advance, so that the temperature of the motor winding is always kept within the preset protection temperature. Furthermore, the output power of the compressor can be correspondingly reduced by reducing the refrigerating capacity of the air conditioning unit, so that the service life of the compressor can be greatly prolonged within the allowable range of the current of the air conditioning unit, and the running stability of the unit is guaranteed.
Description
Technical Field
The invention relates to the technical field of intelligent electrical appliances, in particular to an over-temperature protection method and device for an air conditioning unit, the air conditioning unit, electronic equipment and a storage medium.
Background
The temperature of the motor winding is an important index for safe and stable operation of the compressor and even the whole air conditioning unit. During use of the unit, the motor winding temperature increases as the compressor current increases. If the temperature of the motor winding is too high, the service life of the compressor is badly influenced, and the normal operation of the air conditioning unit is influenced.
At present, only one over-temperature protection value is simply set, and when the actually measured temperature of the motor winding is higher than the preset over-temperature protection value, forced shutdown is executed for over-temperature protection. Although can play certain guard action to the compressor through the excess temperature protection, but when motor winding temperature is higher than the high protective value of temperature, carry out the excess temperature protection through shutting down, though can make motor winding temperature reduce, motor winding resumes normal work back motor winding temperature still can rise again, motor winding temperature can be higher than the high protective value of temperature once more in short time, motor winding need cool down again this moment, thereby can lead to frequently shutting down and carry out the excess temperature protection, frequently shutting down often can cause the life-span of compressor to shorten, and can influence air conditioning unit's normal operating, bring inconvenience for the user.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention provides an over-temperature protection method of an air conditioning unit, which can enable the temperature of a motor winding to be always kept within a preset protection temperature by controlling the temperature of the motor winding in advance. Furthermore, the output power of the compressor can be correspondingly reduced by reducing the refrigerating capacity of the air conditioning unit, so that the service life of the compressor can be greatly prolonged within the allowable range of the current of the air conditioning unit, and the running stability of the unit is guaranteed.
The invention also aims to provide an over-temperature protection device of the air conditioning unit.
Another object of the present invention is to provide an air conditioning unit.
Another object of the present invention is to provide an electronic device.
It is another object of the invention to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an over-temperature protection method for an air conditioning unit, including the following steps: detecting the current temperature of a motor winding in the compressor; and when the current temperature does not exceed the preset protection temperature, controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature.
In order to achieve the above object, a second aspect of the present invention provides an over-temperature protection device for an air conditioning unit, including:
the temperature detection module is used for detecting the current temperature of a motor winding in the compressor;
and the control module is used for controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature when the current temperature does not exceed the preset protection temperature.
According to the over-temperature protection device of the air conditioning unit provided by the embodiment of the second aspect of the invention, the temperature of the motor winding is controlled in advance, so that the temperature of the motor winding is always kept within the preset protection temperature. Furthermore, the output power of the compressor can be correspondingly reduced by reducing the refrigerating capacity of the air conditioning unit, so that the service life of the compressor can be greatly prolonged within the allowable range of the current of the air conditioning unit, and the running stability of the unit is guaranteed.
In order to achieve the above object, an embodiment of a third aspect of the present invention provides an air conditioning unit, including an over-temperature protection device of the air conditioning unit according to the embodiment of the second aspect of the present invention.
In order to achieve the above object, a fourth aspect of the present invention provides an electronic device, including a memory, a processor; the processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the over-temperature protection method for the air conditioning unit provided by the embodiment of the first aspect of the present invention.
In order to achieve the above object, a fourth aspect of the embodiments of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method for protecting an air conditioning unit from over-temperature according to the first aspect of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flow chart of an over-temperature protection method for an air conditioning unit according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of reducing the cooling capacity output of the air conditioning unit according to the embodiment of the present invention.
Fig. 3 is a schematic flow chart of another method for reducing the cooling capacity output of an air conditioning unit according to an embodiment of the present invention.
Fig. 4 is a schematic flow chart of another over-temperature protection method for an air conditioning unit according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an over-temperature protection device of an air conditioning unit according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An excess temperature protection method and apparatus for an air conditioning unit, an electronic device, and a non-transitory computer-readable storage medium according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of an over-temperature protection method for an air conditioning unit according to an embodiment of the present invention. As shown in fig. 1, the method specifically comprises the following steps:
The compressor is a device used for pressurizing refrigerant in the air conditioning unit and playing a role of driving the refrigerant in an air conditioning refrigerant loop, and the compressor is mainly driven by a motor to work.
The motor is internally composed of an iron core and a winding coil. Because the motor winding contains resistance, the loss can be generated when the motor is electrified, and the loss generated after the motor is electrified is often expressed in a thermal form, so that the efficiency of the motor is influenced, and the internal temperature of the motor is increased.
In particular, there are several ways to achieve the measurement of the motor temperature. One of the two temperature sensors can be embedded in the motor, and the current temperature of the motor winding can be detected in real time through the embedded temperature sensor. Generally, the more temperature sensors that are embedded, the closer the final temperature measured is to the temperature of the hottest spot inside the motor. For example, the temperature sensor is embedded between the iron core and the winding at the deep part of the iron core groove, and the highest temperature value is selected from different temperatures detected by different temperature sensors to be used as final acquisition data, so that the temperature in the motor winding is monitored in real time.
And another realizable temperature detection mode can be used for detecting the winding resistance at a certain moment after the temperature rises in real time by utilizing the principle that the resistance of the pure metal wire increases along with the temperature rise, and then obtaining the current temperature of the motor winding at the moment based on the mapping relation between the temperature and the resistance. It should be noted that the current temperature of the motor winding obtained in this way is often an estimated temperature and not a measurement in a practical sense.
And 102, controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature when the current temperature does not exceed the preset protection temperature.
In the embodiment of the invention, the preset protection temperature, namely the maximum allowable heating degree in the motor is within the designed preset service life of the motor under the general condition, and if the temperature of the winding exceeds the preset protection temperature for a long time during operation, the aging speed of the winding insulation is accelerated, and the service life is greatly shortened. Thus, it is particularly important to control the operating temperature of the motor.
Furthermore, only when the temperature of the motor winding reaches the value of the preset protection temperature in the existing air conditioning unit, the overtemperature protection is triggered to be started, so that the service life of the compressor is shortened due to frequent shutdown of the air conditioning unit, and the normal operation of the air conditioning unit can be influenced.
In order to solve the technical problem, in the embodiment of the invention, before the current temperature of the motor winding exceeds the preset protection temperature, the air conditioning unit is controlled in advance to reduce the output of the cooling capacity.
In the embodiment of the invention, the higher the current temperature of the motor winding is, the closer the current temperature is to the preset protection temperature, the higher the control degree of the temperature of the motor winding is, the more the refrigerating capacity needs to be reduced; on the contrary, the lower the current temperature of the motor winding, the longer the distance from the preset protection temperature, the lower the control degree of the temperature of the motor winding, and the less the cooling capacity required to be reduced. Therefore, according to the embodiment of the invention, the air conditioning unit is controlled to reduce the output of the cooling capacity according to the current temperature of the motor winding. The control of the air cooling capacity aims to reduce the temperature of a motor winding of the compressor so as to avoid the phenomenon that the temperature of the motor winding exceeds the preset protection temperature and further causes forced over-temperature protection.
According to the over-temperature protection method for the air conditioning unit, the unit is controlled in advance according to the current temperature of the motor winding in the compressor before the temperature of the motor winding reaches the preset protection temperature, so that the temperature of the motor winding is reduced. Since the output of the cooling capacity is reduced, the operating power of the compressor can be correspondingly reduced. And the reduction of the output efficiency of the compressor is generally caused by the decrease of the output current of the motor. When the current becomes smaller, the losses decrease and the current temperature of the motor winding also decreases randomly. In the embodiment of the invention, the temperature of the motor winding is controlled in advance, so that the temperature of the motor winding is always kept within the preset protection temperature. Furthermore, the output power of the compressor can be correspondingly reduced by reducing the refrigerating capacity of the air conditioning unit, so that the service life of the compressor can be greatly prolonged within the allowable range of the current of the air conditioning unit, and the running stability of the unit is guaranteed.
Fig. 2 is a schematic flow chart of reducing the cooling capacity output of the air conditioning unit according to the embodiment of the present invention. As shown in fig. 2, the method specifically includes the following steps:
And 202, controlling a motor in the compressor to limit the current output current according to the limiting parameter.
In an embodiment of the invention, the limiting parameter defines the extent to which the current is limited. The larger the limiting parameter is, the higher the current is limited; conversely, the smaller the limiting parameter, the lower the limit to which the current is subjected. The limited output current of the motor winding is also related to the current temperature. The higher the temperature is, the closer the temperature is to the preset protection temperature, the greater the limitation on the output current is; conversely, the lower the temperature, the further away from the preset protection temperature the output current is limited to a smaller extent. From the above, it follows that the limiting factor of the current is positively correlated to the current temperature of the motor winding. In the embodiment of the invention, the limiting parameter of the current output current is obtained by multiplying the current temperature by the set limiting coefficient.
After the limiting parameter corresponding to the current output current is obtained, the output current of the motor can be limited through the limiting parameter of the current output current, so that the output current of the motor is reduced, and the output power of the compressor is reduced.
Specifically, when the current temperature of the motor winding is high, the current limiting parameter is large, and the current output current of the motor is limited by using the current output current limiting parameter. In order to limit the current, the thermistor can be used for converting the actual temperature of the motor winding into resistance information in a motor power supply loop so as to directly control the output current of the compressor through the winding temperature. The manner of controlling the current is not limited herein.
Fig. 3 is a schematic flow chart of another method for reducing the cooling capacity output of an air conditioning unit according to an embodiment of the present invention. As shown in fig. 3, the method specifically includes the following steps:
And step 302, controlling the air conditioning unit to unload the load so as to reduce the output of the refrigerating capacity.
And controlling the air conditioning unit to unload the load according to the distance between the current temperature and the preset protection temperature, namely the temperature difference between the two temperatures. The larger the distance between the current temperature and the preset protection temperature is, the more the load required to be unloaded by the air conditioning unit is; the smaller the distance, the less load the air conditioning unit needs to unload.
Wherein the unloading of the load may comprise unloading of a load inside the compressor and/or unloading of a unit outside the air conditioner.
Specifically, the unloading of the internal load of the compressor, optionally, may reduce the operating frequency of the compressor or shut off portions of the compressor vanes. The frequency of the compressor is reduced, the workload of the compressor in unit time is reduced, the heat output of the compressor in unit time is reduced, and the refrigerating capacity of the air conditioning unit is reduced; and part of the guide vanes of the compressor are closed, the power consumption consumed by the motor for driving the compressor is reduced, the heat production of the motor of the compressor is reduced, the gas compression capacity of the compressor is reduced, and the refrigerating capacity of the air conditioning unit is reduced.
For the external unit of the air conditioner, the loading and unloading of a plurality of air conditioning units of the central air conditioner can be realized through the gate valve and/or the butterfly valve, when the temperature of the motor winding is detected to be overhigh, part of the air conditioning units can be selectively closed on the premise that the air conditioner works normally, the 'redundant workload' of the air conditioning units is reduced, the working pressure of the compressor motor is reduced, the running power of the air conditioner is reduced under the condition that the refrigerating effect of the air conditioning units is still good, the heat generated by the motor winding in unit time is reduced, and the over-temperature protection effect is achieved.
In the embodiment of the invention, the process of limiting the output current of the motor cannot limit the output current of the motor infinitely, and the output current of the motor is required to be ensured not to be less than the minimum working current of the compressor in advance. Fig. 4 is a schematic flow chart of another over-temperature protection method for an air conditioning unit according to an embodiment of the present invention. As shown in fig. 4, when limiting the current output current of the motor, the method further includes the following steps:
and step 401, continuously acquiring the ratio of the output current limited by the motor in the compressor to the rated current.
After the output current of the compressor passes through the limit, the percentage of the current after the limit, namely the ratio between the output current of the limited compressor and the rated current, is continuously detected. And when the detected current percentage of the compressor is still larger than the preset threshold value, controlling to continue limiting the output current of the compressor. Wherein, as the output current of the compressor is continuously limited, the limiting coefficient is smaller and smaller, and the decrease of the current gradually tends to be gentle.
And step 402, stopping current limitation on a motor in the compressor and controlling the air conditioning unit to recover to a normal working mode if the ratio of the limited output current to the rated current is smaller than a preset threshold value.
In the embodiment of the invention, the preset threshold corresponds to the minimum working current allowed in the working process of the air conditioning unit, and can be obtained by dividing the minimum working current by the rated current. When the obtained current percentage of the compressor is smaller than a preset threshold value, that is, the current output current of the compressor is smaller than the minimum working current at the moment, it is indicated that the current output current of the compressor is small enough, the heat dissipation rate of the motor winding is far greater than the heat generation rate, and in this case, the temperature of the motor winding is gradually reduced.
Further, in order to ensure the refrigerating capacity of the air conditioning unit, the output current of the compressor needs to be limited not to be too small, that is, the output current is limited by the detected current percentage and a preset threshold, when the output current is smaller than the preset threshold, it is indicated that the current output current of the compressor cannot meet the refrigerating capacity of the air conditioning unit, the current limiting process needs to be exited, and the air conditioning unit is controlled to resume normal operation. In the embodiment of the invention, a threshold value (minimum working current) is set, so that the output current limited by the air conditioning unit is not less than the minimum working current, the air conditioning unit can work at a larger current as much as possible, and the refrigerating capacity of the air conditioning unit is still enough even if the refrigerating capacity of the air conditioning unit is reduced.
On the basis of the above embodiment, the method further comprises the following steps: if the current temperature exceeds the preset protection temperature, the motor of the compressor is in a high-temperature dangerous state, the motor of the compressor is permanently damaged if the motor of the compressor is in the high-temperature dangerous state for a long time, and in order to avoid the situation, when the current temperature is detected to exceed, the air conditioner is immediately controlled to enter an over-temperature protection mode, preferably, the compressor is controlled to be turned off so as to stop the motor to continue to operate, and therefore the temperature of a motor winding is reduced.
Optionally, when the current temperature is detected to exceed the preset protection temperature, on one hand, the over-temperature protection mode is actively entered, and the temperature of the motor winding is controlled to be reduced, for example, a part of the compressor is directly turned off or the rotating speed of the motor is reduced. On the other hand, high-temperature alarm is sent to remind an air conditioner user, the user is advised to control the air conditioner unit to enter a shutdown state, and if the user hears the alarm and decides to control the air conditioner to enter the shutdown state, the compressor motor can be rapidly cooled, and damage to the compressor motor in the cooling process is reduced as much as possible.
Furthermore, the traditional compressor motor only radiates heat generated by the motor winding in a mode of heat conduction between the motor and outside air, so that the heat radiation speed is low and the effect is poor. In the embodiment of the invention, the motor can also accelerate the dissipation of heat generated by the motor in an air cooling and liquid cooling mode, the heat dissipation is fast, the motor can bear more heat, the air conditioning unit can output larger refrigerating capacity, the cooling capacity of the air conditioning unit is enhanced by enhancing the heat dissipation, and a user can have better use experience.
The method is not limited to the case that the current temperature exceeds the preset protection temperature, and can be used for heat dissipation of the motor winding in any air conditioning unit state.
In order to realize the embodiment, the invention further provides an over-temperature protection device of the air conditioning unit.
Fig. 5 is a schematic structural diagram of an over-temperature protection device of an air conditioning unit according to an embodiment of the present invention.
As shown in fig. 5, the over-temperature protection apparatus of the air conditioning unit includes: a temperature detection module 51 and a control module 52.
The temperature detecting module 51 is configured to detect a current temperature of a motor winding in the compressor.
And the control module 52 is configured to control the air conditioning unit to reduce the output of the cooling capacity according to the current temperature when the current temperature does not exceed the preset protection temperature.
Specifically, the control module 52 is configured to:
according to the current temperature, acquiring a limiting parameter for limiting the current output current of a motor in the compressor;
and controlling a motor in the compressor to limit the current output current according to the limiting parameter.
Specifically, the control module 52 is further configured to:
and multiplying the current temperature by a set limiting coefficient to obtain a limiting parameter of the current output current.
Specifically, the control module 52 is further configured to:
and when the current temperature exceeds the preset protection temperature, controlling the air conditioning unit to enter an over-temperature protection mode.
Further, the over-temperature protection device of the air conditioning unit further comprises: a monitoring module 53.
Wherein, the monitoring module 53 is configured to:
after the current output current is limited, the ratio between the output current limited by the motor in the compressor and the rated current is continuously obtained, if the ratio between the limited output current and the rated current is smaller than a preset threshold value, the current limitation on the motor in the compressor is stopped, and the air conditioning unit is controlled to recover the normal working mode.
According to the over-temperature protection device of the air conditioning unit, the temperature of the motor winding is controlled in advance, so that the temperature of the motor winding can be kept within the preset protection temperature all the time. Furthermore, the output power of the compressor can be correspondingly reduced by reducing the refrigerating capacity of the air conditioning unit, so that the service life of the compressor can be greatly prolonged within the allowable range of the current of the air conditioning unit, and the running stability of the unit is guaranteed.
In order to realize the embodiment, the invention further provides an air conditioning unit. Fig. 6 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention. As shown in fig. 6, the air conditioning unit includes an over-temperature protection device 61 of the air conditioning unit provided in the above-described embodiment.
In order to implement the above embodiments, the present invention further provides an electronic device. Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 7, the electronic apparatus includes: a memory 71 and a processor 72.
The processor 72 reads the executable program code stored in the memory 71 to run a program corresponding to the executable program code, so as to implement the over-temperature protection method for the air conditioning unit in the above embodiments.
In order to achieve the above embodiments, the present invention further provides a non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program is configured to implement the over-temperature protection method of the air conditioning unit in the above embodiments when executed by the processor.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. An over-temperature protection method of an air conditioning unit is characterized by comprising the following steps:
detecting the current temperature of a motor winding in the compressor;
when the current temperature does not exceed a preset protection temperature, controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature;
wherein, according to the current temperature, control the output that air conditioning unit reduced the refrigerating output, include:
controlling the air conditioning unit to unload the load according to the distance between the current temperature and the protection temperature so as to reduce the output of the refrigerating capacity; alternatively, the first and second electrodes may be,
acquiring a limiting parameter for limiting the current output current of a motor in the compressor according to the current temperature, wherein the limiting parameter of the current output current is obtained by multiplying the current temperature by a set limiting coefficient; wherein the limiting parameter defines the degree to which the output current is limited, and the larger the limiting parameter is, the higher the degree to which the output current is limited is; conversely, the smaller the limiting parameter is, the lower the limiting degree of the output current is;
and controlling a motor in the compressor to limit the current output current according to the limiting parameter.
2. The over-temperature protection method of the air conditioning unit according to claim 1, further comprising:
and when the current temperature exceeds a preset protection temperature, controlling the air conditioning unit to enter an over-temperature protection mode.
3. The method for protecting the air conditioning unit from the over-temperature according to claim 1, wherein after controlling the motor in the compressor to limit the current output current according to the limiting parameter, the method further comprises:
continuously acquiring the ratio of the output current limited by the motor in the compressor to the rated current;
and if the ratio of the limited output current to the rated current is smaller than a preset threshold value, stopping limiting the current of the motor in the compressor and controlling the air conditioning unit to recover to a normal working mode.
4. An excess temperature protection device of an air conditioning unit is characterized by comprising:
the temperature detection module is used for detecting the current temperature of a motor winding in the compressor;
the control module is used for controlling the air conditioning unit to reduce the output of the refrigerating capacity according to the current temperature when the current temperature does not exceed the preset protection temperature;
wherein, the control module is specifically configured to:
controlling the air conditioning unit to unload the load according to the distance between the current temperature and the protection temperature so as to reduce the output of the refrigerating capacity; alternatively, the first and second electrodes may be,
acquiring a limiting parameter for limiting the current output current of a motor in the compressor according to the current temperature, wherein the limiting parameter of the current output current is obtained by multiplying the current temperature by a set limiting coefficient; wherein the limiting parameter defines the degree to which the output current is limited, and the larger the limiting parameter is, the higher the degree to which the output current is limited is; conversely, the smaller the limiting parameter is, the lower the limiting degree of the output current is;
and controlling a motor in the compressor to limit the current output current according to the limiting parameter.
5. The over-temperature protection device of the air conditioning unit according to claim 4, wherein the control module is further configured to control the air conditioning unit to enter an over-temperature protection mode when the current temperature exceeds a preset protection temperature.
6. The over-temperature protection device of the air conditioning unit according to claim 4, wherein the monitoring module is configured to continue to obtain a ratio between the output current limited by the motor in the compressor and a rated current after limiting the current output current, and stop limiting the current of the motor in the compressor and control the air conditioning unit to return to a normal operation mode if the ratio between the limited output current and the rated current is smaller than a preset threshold.
7. An air conditioning assembly, comprising: an over-temperature protection device for an air conditioning unit as claimed in any of claims 4 to 6.
8. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the over-temperature protection method of the air conditioning unit according to any one of claims 1 to 3.
9. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the over-temperature protection method for an air conditioning unit according to any one of claims 1 to 3.
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| CN109869955B (en) * | 2019-02-25 | 2021-07-30 | 四川长虹空调有限公司 | Method and system for detecting falling of exhaust temperature sensor of refrigeration system |
| CN112476423B (en) * | 2020-11-12 | 2022-03-08 | 腾讯科技（深圳）有限公司 | Method, device and equipment for controlling joint motor of robot and storage medium |
| CN112524761B (en) * | 2020-11-26 | 2022-12-09 | 广东积微科技有限公司 | Method and device for protecting water pumping motor of air conditioner, computer equipment and storage medium |
| CN113028585B (en) * | 2021-03-31 | 2022-04-19 | 四川虹美智能科技有限公司 | Control protection method, device and system for compressor |
| CN116007146A (en) * | 2022-12-28 | 2023-04-25 | 中山长虹电器有限公司 | Control method of air conditioner |
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