CN110779161A - Control method and device for compressor overload protection and air conditioner - Google Patents
Control method and device for compressor overload protection and air conditioner Download PDFInfo
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- CN110779161A CN110779161A CN201911124349.5A CN201911124349A CN110779161A CN 110779161 A CN110779161 A CN 110779161A CN 201911124349 A CN201911124349 A CN 201911124349A CN 110779161 A CN110779161 A CN 110779161A
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Signal Processing (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a control device for compressor overload protection, an air conditioner and a computer readable storage medium, wherein the control method for compressor overload protection comprises the following steps: acquiring the working current and the working temperature of the compressor; when the working current and the working temperature meet a first preset condition, controlling the compressor to stop; and when the compressor meets a second preset condition, controlling the compressor to restart. According to the invention, the compressor is started after being stopped under a specific condition, so that the condition that the use comfort of a user is influenced due to abnormal parameters of the air conditioner caused by overlong stop time on the premise that the built-in protection is not generated is avoided, the occurrence probability of the built-in protection of the compressor is effectively reduced, the operation stability of the air conditioner is improved, and the use comfort of the user is improved.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a control method and device for compressor overload protection, an air conditioner and a computer readable storage medium.
Background
The compressor is used as a core component of the air conditioner, various protection functions are generally arranged in the air conditioner to ensure the safety of the operation of the compressor, besides various protection functions arranged in the air conditioner, a compressor manufacturer generally adds a built-in protector in the compressor, the principle of the built-in protector is to detect the working temperature and the working current of the compressor, under the condition that the working current or/and the working temperature are too high, the built-in protector is disconnected to disconnect a compressor circuit, the compressor stops working to ensure the safety of the compressor, and after the working temperature is recovered to the recovery temperature of the built-in protector, the built-in protector is reclosed to allow the compressor to be put into operation again.
However, the compressor is often located in a relatively sealed space, the heat dissipation of the compressor is slow, when the compressor is subjected to built-in protection, the working temperature of the compressor is reduced to the recovery temperature of the built-in protector, a long time is usually required, and when the compressor is stopped for a long time, the operating parameters of the air conditioner are abnormal, so that the stability of the air conditioner is affected, and the use comfort of a user is reduced.
Disclosure of Invention
In view of the above, the present invention is directed to a method and an apparatus for controlling overload protection of a compressor, an air conditioner, and a computer-readable storage medium, which are capable of reducing occurrence of internal protection of the compressor to improve stability of the air conditioner and improve user comfort in use on the premise of satisfying reliable operation of the air conditioner.
To this end, an aspect of the present invention provides a control method of overload protection of a compressor, which includes: acquiring the working current and the working temperature of the compressor; when the working current and the working temperature meet a first preset condition, controlling the compressor to stop; and when the compressor meets a second preset condition, controlling the compressor to restart.
In one aspect of the invention, the compressor is started after being stopped under a specific condition, so that the condition that the use comfort of a user is influenced due to abnormal parameters of the air conditioner caused by overlong stop time on the premise that the built-in protection is not generated is avoided, the generation probability of the built-in protection of the compressor is effectively reduced, the operation stability of the air conditioner is improved, and the use comfort of the user is improved.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the method further includes: and determining the corresponding maximum protection temperature and minimum protection temperature of the built-in protector of the compressor under the working current according to the working current. Preferably, the first preset condition or the third preset condition is determined according to the maximum protection temperature and the minimum protection temperature. Normally, the built-in protector of the compressor has a current-temperature characteristic curve, e.g. max f
max(I) Minimum function f
min(I) Therefore, according to the detected working current, the corresponding maximum protection temperature and the minimum protection temperature on the curve can be conveniently calculated, so that the first preset condition or the third preset condition can be conveniently determined.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the first preset condition includes: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
0＞(T
max+T
min) /2, wherein, T
0Denotes the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxRepresents the maximum protection temperature, T
minRepresenting the minimum protection temperature. . Under the condition, when the first preset condition is met, the compressor can be considered to be overloaded, so that the compressor is controlled to stop to cool down, the compressor can be prevented from continuously working under the overload condition to prevent damage, and the compressor is controlled to be started after the second preset condition is met, so that the compressor can be further prevented from being damagedAvoid not taking place under the prerequisite of built-in protection at the compressor, the down time overlength arouses that the air conditioner parameter is unusual to influence the emergence of the condition that the user used the travelling comfort, effectively reduced the emergence probability of the built-in protection of compressor, improve the operating stability of air conditioner, in order to promote user's use comfort.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the method further includes: and when the working current and the working temperature meet a third preset condition, controlling the load of the compressor to be reduced. Therefore, when the compressor is overloaded, the heat absorption capacity of the compressor is reduced by reducing the load of the compressor, so that the working temperature of the compressor is reduced, the occurrence probability of built-in protection is effectively reduced, the running stability of the air conditioner is improved, and the use comfort of a user is improved.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the third preset condition includes: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
min≦T
0≦(T
max+T
min) /2, wherein, T
0Denotes the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxRepresents the maximum protection temperature, T
minRepresenting the minimum protection temperature. According to the current-temperature characteristic curve of the built-in protector of the compressor, the occurrence probability of the built-in protection is lower under the third preset condition, so that when the third preset condition is met, the load of the compressor is reduced through control to reduce the heat absorption capacity of the compressor, the working temperature of the compressor is reduced, the occurrence probability of the built-in protection is further reduced, the running stability of the air conditioner is improved, and the use comfort of a user is improved.
In addition, in the method for controlling overload protection of a compressor according to the present invention, optionally, the specific implementation of controlling the load reduction of the compressor includes: the unloading valve of the air conditioner is opened. Therefore, the load of the compressor can be effectively reduced by opening the unloading valve, so that the occurrence of built-in protection is effectively prevented, and the running stability of the air conditioner is improved.
In addition, in the method for controlling overload protection of a compressor according to the present invention, optionally, the specific implementation of controlling the load reduction of the compressor further includes: when the air conditioner is in a heating mode, controlling the rotating speed of a fan of an outdoor unit of the air conditioner to be reduced; and when the air conditioner is in a refrigeration mode, controlling the rotating speed of a fan of an indoor unit of the air conditioner to be reduced. Therefore, the heat absorption capacity of the compressor can be effectively reduced by adjusting the rotating speed of the corresponding fan of the air conditioner, namely, the reduction of the load of the compressor is realized, so that the occurrence of built-in protection is effectively prevented, and the running stability of the air conditioner is improved.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the first preset condition further includes: the working current is equal to zero, and the working temperature is greater than or equal to the first set temperature. Under this condition, when satisfying first preset condition, can regard the compressor overload, from this, shut down through control compressor and make its cooling, can avoid it to continue work under the overload condition, in order to prevent damage, and, control the compressor again and open after satisfying second preset condition, can further avoid under the prerequisite that the compressor does not take place built-in protection, the down time overlength arouses that the air conditioner parameter is unusual, thereby influence the emergence of the condition of user's comfort in use, the emergence probability of compressor built-in protection has effectively been reduced, improve the operating stability of air conditioner, in order to promote user's comfort in use.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the second preset condition includes: the shutdown time of the compressor reaches a preset time. From this, the compressor can be opened again after the time of shutting down predetermineeing promptly to make the compressor clearance operation, thereby avoid under the prerequisite that the compressor did not take place built-in protection, the shut-down time overlength arouses the air conditioner parameter unusual, thereby influence the emergence of the condition that the user used the travelling comfort, effectively reduced the emergence probability of the built-in protection of compressor, improve the operating stability of air conditioner, in order to promote user's use comfort.
In addition, in the control method for overload protection of a compressor according to the present invention, optionally, the method further includes: acquiring the accumulated times of continuous shutdown of the compressor; and when the accumulated times is greater than or equal to the set times, generating the information of the overload protection fault of the compressor. Preferably, the set number of times is 6. Generally, after the compressor has built-in protection, the shutdown time is often long, which may cause abnormal operation parameters of the air conditioner, and the air conditioner is prone to misjudge the built-in protection as faults of other systems, such as fluorine-lacking protection, abnormal reversing of a four-way valve, and the like, thereby improving the difficulty of troubleshooting and maintenance of the air conditioner.
Another aspect of the present invention provides a control apparatus for overload protection of a compressor, including: an acquisition unit for acquiring an operating current and an operating temperature of the compressor; the control unit is used for controlling the compressor to stop when the working current and the working temperature meet a first preset condition; and the starting unit is used for controlling the compressor to restart when the compressor meets a second preset condition.
Yet another aspect of the present invention provides an air conditioner including: a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the control method of compressor overload protection as described in any one of the above.
Yet another aspect of the present invention provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the control method of compressor overload protection as set forth in any one of the above.
In the present invention, the control device for compressor overload protection, the air conditioner and the computer readable storage medium have the same advantages as the above control method for compressor overload protection over the prior art, and are not described herein again.
According to the invention, the control method, the device, the air conditioner and the computer readable storage medium for the compressor overload protection can reduce the occurrence of the compressor built-in protection to improve the stability of the air conditioner on the premise of meeting the reliable operation of the air conditioner, can correctly detect the built-in protection of the compressor, and avoid misinformation as other protection, so as to facilitate troubleshooting and reduce the maintenance difficulty.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart illustrating a control method for overload protection of a compressor according to an embodiment of the present invention;
fig. 2 is a schematic current detection wiring diagram of a single-phase compressor according to an embodiment of the present invention;
fig. 3 is a schematic current detection wiring diagram of a three-phase compressor according to an embodiment of the present invention;
fig. 4 is another schematic flow chart of a control method for overload protection of a compressor according to an embodiment of the present invention;
fig. 5 is a graph of current-temperature characteristics of a built-in protector of a compressor according to an embodiment of the present invention;
fig. 6 is a schematic configuration diagram of a compressor overload protection control device according to an embodiment of the present invention.
Description of reference numerals:
the method comprises the steps of 1-a compressor, 2-a current transformer, 3-a built-in protector, 4-a control device for overload protection of the compressor, 41-an obtaining unit, 42-a control unit and 43-a starting unit.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a schematic flow chart illustrating a method for controlling overload protection of a compressor according to an embodiment of the present invention.
Referring to fig. 1, in the present embodiment, a method for controlling overload protection of a compressor may include: step S100: acquiring the working current and the working temperature of the compressor 1; step S310: when the working current and the working temperature meet a first preset condition, controlling the compressor 1 to stop; step S400: and when the compressor 1 meets the second preset condition, controlling the compressor 1 to restart.
In this embodiment, open again after shutting down through making the compressor under specific condition to avoid under its prerequisite that does not take place built-in protection, the downtime overlength arouses the air conditioner parameter unusual, thereby influence the emergence of the condition that the user used the travelling comfort, effectively reduced the emergence probability of the built-in protection of compressor, improve the operating stability of air conditioner, in order to promote user's use comfort.
Fig. 2 is a schematic diagram of a current detection connection of a single-phase compressor according to an embodiment of the present invention, and fig. 3 is a schematic diagram of a current detection connection of a three-phase compressor according to an embodiment of the present invention.
In the present embodiment, in step S100: the operating current and the operating temperature of the compressor 1 are detected, wherein the type of the compressor 1 is not particularly limited. In some examples, the compressor 1 may be a single phase compressor. In other examples, the compressor 1 may be a three-phase compressor or the like. Therefore, different compressors can be arranged according to the requirements of the air conditioner so as to meet different application requirements and the like.
In the present embodiment, the method of detecting the operating current of the compressor 1 in step S100 is not particularly limited, and the operating current may be detected and obtained by, for example, a current transformer, an ammeter, or the like. In some examples, referring to fig. 2, for a single-phase compressor, a current transformer 2 may be disposed on a wiring line of the compressor 1, and a current detected by the current transformer 2 is an operating current of the compressor 1. In other examples, referring to fig. 3, for a three-phase compressor, the current transformers 2 may be respectively disposed on two-phase lines of a three-phase power supply of the compressor 1, for example, U, V phase or U, W phase or V, W phase are equal, and the larger of the currents detected by the two current transformers 2 is the operating current of the compressor 1. Thereby, the (maximum) operating current of the compressor can be obtained more accurately and conveniently.
In the present embodiment, the method of detecting the operating temperature of the compressor 1 in step S100 is not particularly limited. In some examples, a temperature sensor may be provided on the shell of the compressor 1 to detect the shell temperature of the compressor 1, i.e. the operating temperature of the compressor 1. Therefore, the working temperature of the compressor can be acquired more conveniently.
Fig. 4 is another schematic flow chart of a control method for overload protection of a compressor according to an embodiment of the present invention.
Referring to fig. 4, in the present embodiment, the method for controlling overload protection of a compressor may further include: step S200: and determining the corresponding maximum protection temperature and the minimum protection temperature of the built-in protector 3 of the compressor 1 under the working current according to the working current. Thus, a first preset condition or a third preset condition (described later) may be determined according to the maximum protection temperature and the minimum protection temperature.
Fig. 5 is a graph showing a current-temperature characteristic of the built-in protector of the compressor according to the embodiment of the present invention.
Normally, the built-in protector 3 of the compressor 1 has a current (I) -temperature (T) characteristic curve, and as shown in fig. 5, the maximum protection operation curve f of the built-in protector 3 can be obtained
max(I) And minimum protection action curve f
min(I) In that respect When the operating current and the operating temperature of the compressor 1, i.e. (I)
0，T
0) At curve f
min(I) In the following, the compressor 1 will generally not have built-in protection; when (I)
0，T
0) At curve f
max(I) In the above, the compressor 1 generally has built-in protection; when (I)
0，T
0) At curve f
min(I) And curve f
max(I) In between, i.e. in the shaded area in fig. 5, there is a possibility that the compressor 1 is internally protected and gets closer to the curve f
min(I) The lower the probability of occurrence of built-in protection, the closer to the curve f
max(I) The higher the probability of built-in protection.
In the present embodiment, in step S200, the operating current I is set
0Substituting the numerical value of (f) into the maximum protection action curve f
max(I) And minimum protection action curve f
min(I) The maximum protection temperature and the minimum protection temperature can be calculated. Here, the maximum protection temperature is f
max(I
0) Corresponding numerical result T
maxThe so-called minimum protection temperature is f
min(I
0) Corresponding numerical result T
min. Therefore, according to the detected working current, the corresponding maximum protection temperature and the minimum protection temperature on the curve can be conveniently calculated, so that the first preset condition or the third preset condition can be conveniently determined.
In the present embodiment, in step S310: and when the working current and the working temperature meet the first preset condition, controlling the compressor 1 to stop. In some examples, the first preset condition may include: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
0＞(T
max+T
min) /2, wherein, T
0Indicating the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxDenotes the maximum protection temperature, T
minIndicating the minimum protection temperature. In other examples, the first preset condition may further include: the working current is equal to zero, and the working temperature is greater than or equal to a first set temperature. In this case, when any one of the first preset conditions is satisfied, the compressor is considered to be overloaded, and therefore, the compressor is controlled to stop to cool down the compressor, so that the compressor can be prevented from continuously working under the overload condition to prevent damage, and the compressor is controlled to start after the second preset condition is satisfied, so that the compressor can be further prevented from being protected without internal protectionAnd the air conditioner parameters are abnormal due to overlong downtime, so that the condition of using comfort of a user is influenced, the occurrence probability of built-in protection of the compressor is effectively reduced, the operation stability of the air conditioner is improved, and the using comfort of the user is improved.
In the present embodiment, as described above, T
aIs the first set temperature. Wherein the first set temperature T
aIt may be the recovery temperature of the built-in protector 3 of the compressor 1. In general, when the operating current of the compressor is too high or the operating temperature is too high, the bimetal of the built-in protector is deformed by heat to break the contact, thereby cutting off the power supply of the compressor, and when the temperature is reduced, the bimetal can be automatically reset, so that the recovery temperature refers to the temperature corresponding to the time when the built-in protector 3 is disconnected due to the too high temperature of the compressor 1 and then is reconnected. In some examples, T
aThe value of (A) can be 50 ℃ to 90 ℃, such as 55 ℃, 75 ℃ and 80 ℃, and the like. In other examples, T
aThe value of (A) can be 60 ℃ to 70 ℃, such as 62 ℃, 65 ℃, 68 ℃ and the like. Therefore, different recovery temperatures can be set according to different types or properties of the compressor, so that different values of the first set temperature can be determined, and different application requirements can be met.
In the present embodiment, as described above, T
sIs the second set temperature. Wherein the second set temperature T
sThe value of (b) is not particularly limited. In some examples, T
sThe value of (A) can be 5 ℃ to 20 ℃, such as 8 ℃, 16 ℃, 18 ℃ and the like. In other examples, T
sThe value of (A) can be 10 ℃ to 15 ℃, such as 11 ℃, 12 ℃, 13 ℃, 14 ℃ and the like. From this, can set up different second and set for the temperature according to the heat dissipation condition of compressor, when the heat dissipation of compressor was slow promptly, can set up lower second and set for the temperature to guarantee the radiating efficiency, when the heat dissipation of compressor was fast, can set up higher second and set for the temperature, thereby prevent that the temperature from reducing in too short time, in order to lead to the excessive frequent start-stop of compressor.
In the present embodiment, in step S400: and when the compressor 1 meets the second preset condition, controlling the compressor 1 to restart. In some examples, the second preset condition may include: the shutdown time of the compressor 1 reaches a preset time, wherein the value of the preset time is not particularly limited. In other examples, the preset time may be 3min to 8min, such as 4min, 5min, 6min, and so on. Therefore, the compressor can be controlled to stop and cool for a certain time, and then restarted, and the compressor can be quickly put into the next operation through the clearance operation.
In addition, in the present embodiment, after the compressor 1 is restarted, the detection and the magnitude determination of the operating current and the operating temperature of the compressor 1 are performed, and when the operating temperature is less than or equal to the first set temperature, the normal operation of the compressor 1 can be continuously maintained. Therefore, the occurrence probability of the built-in protection can be effectively reduced, and the running stability of the air conditioner is improved.
Referring to fig. 4, in the present embodiment, the method for controlling overload protection of a compressor may further include: step S500: acquiring the accumulated times of continuous shutdown of the compressor 1; when the accumulated number of times is greater than or equal to the set number of times, information of the overload protection failure of the compressor 1 is generated. Here, the information of the overload protection failure means information that the compressor has built-in protection. Generally, after the compressor has built-in protection, the shutdown time is often long, which may cause abnormal operation parameters of the air conditioner, and the air conditioner is prone to misjudge the built-in protection as faults of other systems, such as fluorine-lacking protection, abnormal reversing of a four-way valve, and the like, thereby improving the difficulty of troubleshooting and maintenance of the air conditioner.
In the present embodiment, the manner of issuing the overload protection failure information as described above is not particularly limited. In some examples, the overload protection fault information may be emitted by a light flashing, sound alert, or the like. Therefore, different guarantee modes can be set according to the design requirements of the air conditioner so as to meet the requirements of different users or use environments and the like.
In the present embodiment, the value of the set number of times is not particularly limited. In some examples, the set number of times may be 5 to 9, such as 6, 7, or 8, etc. Therefore, different setting times can be set according to different types of the air conditioners and the like so as to meet different application requirements and the like.
In this embodiment, referring to fig. 4, the method for controlling overload protection of a compressor may further include: step S320: when the operating current and the operating temperature satisfy the third preset condition, the load of the compressor 1 is controlled to be reduced. Here, the concrete implementation of controlling the load reduction of the compressor 1 is not particularly limited. In some examples, specific implementations of controlling the load reduction of the compressor 1 may include: the unloading valve of the air conditioner is opened. In other examples, specific implementations of controlling the load reduction of the compressor 1 may include: when the air conditioner is in a heating mode, controlling the rotating speed of a fan of an outdoor unit of the air conditioner to be reduced; and when the air conditioner is in a refrigeration mode, controlling the rotating speed of a fan of an indoor unit of the air conditioner to be reduced. Under the condition, the heat absorption capacity of the compressor can be effectively reduced by opening the unloading valve or adjusting the rotating speed of a corresponding fan of the air conditioner, namely, the load of the compressor is reduced, so that the occurrence of built-in protection is effectively prevented, and the running stability of the air conditioner is improved.
In this embodiment, in step S320, the third preset condition may include: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
min≦T
0≦(T
max+T
min) /2, wherein, T
0Indicating the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxDenotes the maximum protection temperature, T
minIndicating the minimum protection temperature. According to the current-temperature characteristic curve of the built-in protector of the compressor, under the third preset condition, the built-in protector has low occurrence probability, so that the compressor is full of the current-temperature characteristic curveWhen the third preset condition is satisfied, the load of the compressor is reduced through control, so that the heat absorption capacity of the compressor is reduced, the working temperature of the compressor is reduced, the occurrence probability of built-in protection is further reduced, the running stability of the air conditioner is improved, and the use comfort of a user is improved.
In the present embodiment, when the operating temperature of the compressor 1 is less than the sum of the first set temperature and the second set temperature, i.e., T
0＜T
a+T
sIn time, the air conditioner can run freely without processing. In general, when T is
0＜T
a+T
sIt may be T
0＜T
aOr with the first set temperature T
aThe compressor has the advantages that the compressor can be quickly cooled to the recovery temperature even if the compressor is subjected to built-in protection under the condition of relatively close numerical value, so that the built-in protector can be quickly recovered to be closed, the compressor can also be quickly recovered to work, the running stability of the air conditioner cannot be influenced, and the conditions of fault false alarm and the like cannot be easily caused.
Fig. 6 is a schematic configuration diagram of a compressor overload protection control device according to an embodiment of the present invention.
Referring to fig. 6, in the present embodiment, the control device 4 for compressor overload protection may include: an acquisition unit 41 for acquiring the operating current and the operating temperature of the compressor 1, a control unit 42 for controlling the compressor 1 to stop when the operating current and the operating temperature satisfy a first preset condition, and a start unit 43 for controlling the compressor 1 to restart when the compressor 1 satisfies a second preset condition.
In this embodiment, through the synergistic effect of a plurality of units of compressor overload protection's controlling means, can control the compressor and open again after shutting down under specific condition to avoid under its prerequisite that does not take place built-in protection, the down time overlength arouses that the air conditioner parameter is unusual, thereby influence the emergence of the condition that the user used the travelling comfort, effectively reduced the emergence probability of the built-in protection of compressor, improve the operating stability of air conditioner, in order to promote user's use comfort.
In addition, in the present embodiment, the control device 4 for compressor overload protection may further include: and the computing unit is used for determining the corresponding maximum protection temperature and the minimum protection temperature of the built-in protector 3 of the compressor 1 under the working current according to the working current. Thus, the first preset condition or the third preset condition may be determined according to the maximum protection temperature and the minimum protection temperature.
In addition, in the present embodiment, the control device 4 for compressor overload protection may further include: and the fault reminding unit is used for acquiring the accumulated times of continuous stop of the compressor 1 and generating the information of the overload protection fault of the compressor 1 when the accumulated times is greater than or equal to the set times. Here, the information of the overload protection failure means information that the compressor has built-in protection. Generally, after the compressor has built-in protection, the shutdown time is often long, which may cause abnormal operation parameters of the air conditioner, and the air conditioner is prone to misjudge the built-in protection as faults of other systems, such as fluorine-lacking protection, abnormal reversing of a four-way valve, and the like, thereby improving the difficulty of troubleshooting and maintenance of the air conditioner.
Furthermore, in the present embodiment, the control unit 42 of the control device 4 for compressor overload protection may also be configured to control the load of the compressor 1 to be reduced when the operating current and the operating temperature satisfy the third preset condition. Here, the concrete implementation of controlling the load reduction of the compressor 1 is not particularly limited. In some examples, specific implementations of controlling the load reduction of the compressor 1 may include: the unloading valve of the air conditioner is opened. In other examples, specific implementations of controlling the load reduction of the compressor 1 may include: when the air conditioner is in a heating mode, controlling the rotating speed of a fan of an outdoor unit of the air conditioner to be reduced; and when the air conditioner is in a refrigeration mode, controlling the rotating speed of a fan of an indoor unit of the air conditioner to be reduced. Under the condition, the heat absorption capacity of the compressor can be effectively reduced by opening the unloading valve or adjusting the rotating speed of a corresponding fan of the air conditioner, namely, the load of the compressor is reduced, so that the occurrence of built-in protection is effectively prevented, and the running stability of the air conditioner is improved.
In the present embodiment, there is also disclosed an air conditioner including: a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method for overload protection of a compressor as described above.
In this embodiment, a computer-readable storage medium storing a computer program is also disclosed, and when the computer program is read and executed by a processor, the method for controlling overload protection of a compressor as described above can be implemented. Among them, the form of the computer-readable storage medium is not particularly limited. In some examples, the computer-readable storage medium may be a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), or a portable Read Only Memory (CD-ROM), and may be used to store related instructions and data.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention will be apparent to those skilled in the art from this description.
Claims (13)
1. A method for controlling overload protection of a compressor, comprising:
acquiring the working current and the working temperature of the compressor (1);
when the working current and the working temperature meet a first preset condition, controlling the compressor (1) to stop;
and when the compressor (1) meets a second preset condition, controlling the compressor (1) to restart.
2. The control method of compressor overload protection according to claim 1, further comprising:
and determining the corresponding maximum protection temperature and minimum protection temperature of the built-in protector (3) of the compressor (1) under the working current according to the working current.
3. The control method of compressor overload protection according to claim 2, wherein the first preset condition includes: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
0＞(T
max+T
min) /2, wherein, T
0Denotes the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxRepresents the maximum protection temperature, T
minRepresenting the minimum protection temperature.
4. The control method of compressor overload protection according to claim 2, further comprising:
and when the working current and the working temperature meet a third preset condition, controlling the load of the compressor (1) to be reduced.
5. The control method of compressor overload protection according to claim 4, wherein the third preset condition includes: the working current is greater than zero, and the working temperature satisfies T
0≥T
a+T
sAnd T
min≦T
0≦(T
max+T
min) /2, wherein, T
0Denotes the operating temperature, T
aIndicating a first set temperature, T
sIndicating a second set temperature, T
maxRepresents the maximum protection temperature, T
minRepresenting the minimum protection temperature.
6. A control method of compressor overload protection according to claim 4, characterized in that said specific implementation of controlling the load reduction of the compressor (1) comprises:
the unloading valve of the air conditioner is opened.
7. A control method of compressor overload protection according to claim 4, characterized in that said specific realisation of controlling the load reduction of the compressor (1) further comprises:
when the air conditioner is in a heating mode, controlling the rotating speed of a fan of an outdoor unit of the air conditioner to be reduced;
and when the air conditioner is in a refrigeration mode, controlling the rotating speed of a fan of an indoor unit of the air conditioner to be reduced.
8. The control method of compressor overload protection according to claim 3, wherein the first preset condition further comprises: the working current is equal to zero, and the working temperature is greater than or equal to the first set temperature.
9. The control method of compressor overload protection according to claim 1, wherein the second preset condition includes: the shutdown time of the compressor (1) reaches a preset time.
10. The control method of compressor overload protection according to claim 1, further comprising:
acquiring the accumulated times of continuous shutdown of the compressor (1);
and when the accumulated times is greater than or equal to the set times, generating information of the overload protection fault of the compressor (1).
11. A control device (4) for overload protection of a compressor, characterized by comprising:
an acquisition unit (41) for acquiring an operating current and an operating temperature of the compressor (1);
a control unit (42) for controlling the compressor (1) to stop when the operating current and the operating temperature satisfy a first preset condition;
a starting unit (43) for controlling the compressor (1) to restart when the compressor (1) meets a second preset condition.
12. An air conditioner, comprising:
a computer-readable storage medium and a processor storing a computer program which, when read and executed by the processor, implements the control method of compressor overload protection according to any one of claims 1 to 10.
13. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of compressor overload protection according to any one of claims 1 to 10.
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| CN201911124349.5A CN110779161B (en) | 2019-11-18 | 2019-11-18 | Control method and device for compressor overload protection and air conditioner |
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|---|---|---|---|
| CN201911124349.5A CN110779161B (en) | 2019-11-18 | 2019-11-18 | Control method and device for compressor overload protection and air conditioner |
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| CN110779161B CN110779161B (en) | 2021-08-27 |
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| CN111637587A (en) * | 2020-05-28 | 2020-09-08 | 宁波奥克斯电气股份有限公司 | Control method and system for compressor overload protection and air conditioner |
| CN111795479A (en) * | 2020-07-09 | 2020-10-20 | 广东Tcl智能暖通设备有限公司 | Control method and device for air conditioner outdoor unit, air conditioner outdoor unit and storage medium |
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| CN112944602A (en) * | 2021-02-04 | 2021-06-11 | 珠海格力电器股份有限公司 | Control method and device of fixed-frequency air conditioner, storage medium and fixed-frequency air conditioner |
| CN114135986A (en) * | 2020-09-04 | 2022-03-04 | 广东美的制冷设备有限公司 | Air conditioner, method of controlling the same, and computer-readable storage medium |
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| CN110779161B (en) | 2021-08-27 |
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