CN108679779B - Air conditioner outdoor unit, air conditioner, control method, controller and storage medium - Google Patents
Air conditioner outdoor unit, air conditioner, control method, controller and storage medium Download PDFInfo
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- CN108679779B CN108679779B CN201810418598.4A CN201810418598A CN108679779B CN 108679779 B CN108679779 B CN 108679779B CN 201810418598 A CN201810418598 A CN 201810418598A CN 108679779 B CN108679779 B CN 108679779B
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- air conditioner
- throttling unit
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
Abstract
The invention provides an air conditioner outdoor unit, an air conditioner, a control method, a controller and a storage medium, wherein a second throttling unit formed by serially connecting a throttling component and an electromagnetic valve is connected to a first throttling unit in parallel, a sensor is arranged on a shell of a compressor to detect the shell temperature value of the compressor, whether the first throttling unit is blocked or not is judged according to the shell temperature value, and the electromagnetic valve is controlled to be opened when the first throttling unit is blocked, so that the second throttling unit is connected into a pipeline of the air conditioner to throttle a refrigerant in the pipeline. Compared with the existing single throttling component, the air conditioner provided by the invention is additionally provided with the second throttling unit, and the emergency second throttling unit can be started to continue throttling when the first throttling unit is blocked, so that the problem of compressor failure caused by overhigh temperature rise of a compressor shell due to blockage of the throttling component is avoided.
Description
Technical Field
The invention relates to the field of air conditioner control, in particular to an air conditioner outdoor unit, an air conditioner, a control method, a controller and a storage medium.
Background
The conventional air conditioner at present only has one throttling part, such as a capillary tube or an electronic expansion valve, or the capillary tube and the electronic expansion valve are connected in series and then are throttled, when the throttling part has a fault, such as dirty blockage, oil blockage or ice blockage of the capillary tube or the electronic expansion valve, a system can not form normal refrigerant fluid circulation, normal refrigeration and heating can not be realized, and after long-term operation, the temperature of a shell of a compressor is higher and higher due to the fact that the compressor can not radiate heat through a refrigerant, and the compressor is burnt down in severe cases.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an outdoor unit of an air conditioner, and aims to solve the problem that the conventional air conditioner cannot normally dissipate heat to cause high-temperature fault of a compressor due to blockage fault of a single throttling component.
In order to achieve the above object, the present invention provides an outdoor unit of an air conditioner, comprising a compressor, a four-way valve, an outdoor heat exchanger, and a first throttling unit, which are sequentially connected, wherein the first throttling unit has a port for connecting the indoor unit of the air conditioner, and the outdoor unit of the air conditioner further comprises:
the second throttling unit comprises a throttling component and an electromagnetic valve which are connected in series, the second throttling unit is connected in parallel to two ends of the first throttling unit to form a refrigerant bypass, and the electromagnetic valve is used for controlling the opening and closing of the refrigerant bypass.
Preferably, the first throttling unit is a capillary tube or an electronic expansion valve, and/or the second throttling unit is a capillary tube.
In order to achieve the above object, the present invention further provides an air conditioner, which comprises an indoor unit, a temperature sensor, a controller and the outdoor unit of the air conditioner, wherein the indoor unit is provided with an indoor heat exchanger, two ends of the indoor heat exchanger are connected with the four-way valve and the first throttling unit in a one-to-one correspondence manner, the temperature sensor is used for detecting the temperature of a shell on the compressor, wherein,
and the controller is used for controlling the electromagnetic valve to be opened to throttle the refrigerant in the second throttling unit air conditioner pipeline when the blockage of the first throttling unit is determined according to the temperature parameter detected by the temperature sensor.
In order to achieve the above object, the present invention further provides an air conditioner control method, in which an indoor unit and an outdoor unit of the air conditioner are connected to each other through a first throttling unit and a second throttling unit connected in parallel to the first throttling unit, the second throttling unit includes a throttling component and an electromagnetic valve connected in series to each other, a compressor of the air conditioner is provided with a sensor for detecting a temperature of a casing of the compressor, the air conditioner control method includes:
obtaining a shell temperature value TK of the compressor;
judging whether TK > TC1 is established, wherein TC1 is a first preset temperature value, and TC1 is greater than 135 ℃;
when TK > TC1 and the duration exceeds tm1, determining that the first throttling unit is blocked, controlling the solenoid valve to be opened to enable the second throttling unit to be connected to an air conditioner pipeline, wherein tm1 is a first preset time, and 8 minutes < tm1<12 minutes.
Preferably, the first throttling unit is a capillary tube, and when TK > TC1 does not hold, the air conditioner control method further includes:
detecting tcn a continuous run time of the compressor;
judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
when TC2< TK is not more than TC1, judging whether tcn > tm2 is established, wherein tm2 is a second preset time, and 38 minutes < tm1<43 minutes;
when tcn > tm2, detecting and acquiring an operation current value Icomp of the compressor and a discharge temperature value TP of the compressor;
judging whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < tm1< 1.5A;
when Icomp < I0, judging whether TP > TC3 is established, wherein TC3 is a third preset temperature value, and TC3 is more than or equal to 89 and less than or equal to 92 ℃;
when TP > TC3 and the duration exceeds a third preset time tm3, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected into the air conditioner pipeline, wherein 0.5 min < tm3<2 min.
Preferably, when Icomp < I0 and TP > TC3 is determined not to be satisfied, the air conditioner control method further includes:
judging that TC4 is greater than or equal to TP and less than or equal to TC3, wherein TC4 is a fourth preset temperature value, and TC4 is greater than or equal to 78 ℃ and less than or equal to 82 ℃;
when TC4< TP ≦ TC3 and the duration time exceeds a fourth preset time tm4, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected to the air conditioner pipeline system to work, wherein 18 minutes < tm4<24 minutes.
Preferably, the first throttle unit is an electronic expansion valve, and when TK > TC1 does not hold, the air conditioner control method further includes:
judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
when TC2< TK is not more than TC1, detecting and acquiring continuous running time tcn of the compressor, and judging whether tcn > tm2 is established, wherein tm2 is second preset time, and 38 minutes < tm1<43 minutes;
when tcn > tm2, detecting and acquiring an operating current value Icomp of the compressor;
judging whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < I0< 1.5A;
when Icomp is less than I0, acquiring the current opening value D of the electronic expansion valve, and judging whether D is greater than Dmax-D1, wherein Dmax is the maximum opening value of the electronic expansion valve in operation, D1 is a preset opening value, and 70 steps are less than D1 and less than 90 steps;
when D is more than Dmax-D1 and the duration time exceeds a third preset time tm3, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected to the air conditioner pipeline, wherein 0.5 min < tm3<2 min.
Preferably, after the step of judging that the first throttling unit is blocked and controlling the electromagnetic valve to open to enable the second throttling unit to be connected to the air conditioner pipeline system, the method further comprises the following steps:
when the compressor is started again, judging whether TK is less than or equal to TC 2;
and when TK is less than or equal to TC2, judging that the first throttling unit is blocked and recovered, and controlling the electromagnetic valve to be closed.
Preferably, after the step of judging that the first throttling unit is blocked and controlling the electromagnetic valve to open to enable the second throttling unit to be connected to the air conditioner pipeline system, the method further comprises the following steps:
accumulating the times N for judging the blockage of the first throttling unit;
when the compressor is started again, judging whether N is more than or equal to N0, wherein N0 is a preset numerical value, and N0 is more than or equal to 2 and less than or equal to 5;
and when N is larger than or equal to N0, determining that the first throttling unit is in a normally blocked state, and controlling the electromagnetic valve to be opened so that the second throttling unit is connected into the air conditioner pipeline system.
Preferably, when N ≧ N0 is false, the air conditioner control method further includes:
judging whether Icomp is greater than or equal to I0;
when Icomp is larger than or equal to I0, the blockage of the first throttling unit is determined to be recovered, and the electromagnetic valve is controlled to be closed.
In order to achieve the above object, the present invention further provides an air conditioner controller, where the controller is disposed in an indoor unit or an outdoor unit of an air conditioner, the controller includes a memory, a processor, and an air conditioner control program stored in the memory and operable on the processor, and the air conditioner control program implements the air conditioner control method when executed by the processor.
To achieve the above object, the present invention also provides a computer readable storage medium having stored thereon an air conditioner control program, which, when executed by a processor, implements the steps of the air conditioner control method.
According to the air conditioner provided by the embodiment of the invention, the first throttling unit is connected with the second throttling unit formed by serially connecting the throttling component and the electromagnetic valve in parallel, the sensor is arranged on the shell of the compressor, so that the shell temperature value of the compressor is detected, whether the first throttling unit is blocked or not is judged according to the shell temperature value, and the electromagnetic valve is controlled to be opened when the first throttling unit is blocked, so that the second throttling unit is connected into the pipeline of the air conditioner, and the refrigerant in the pipeline is throttled. Compared with the existing single throttling component, the air conditioner provided by the invention is additionally provided with the second throttling unit, and the emergency second throttling unit can be started to continue throttling when the first throttling unit is blocked, so that the problem of compressor failure caused by overhigh temperature rise of a compressor shell due to blockage of the throttling component is avoided.
Drawings
FIG. 1 is a schematic diagram of an air conditioner pipeline in which a first throttling unit of the air conditioner is a capillary tube;
FIG. 2 is a schematic diagram of an air conditioner pipe in which a first throttle unit of the air conditioner pipe is an electronic expansion valve according to the present invention;
FIG. 3 is a flowchart illustrating a control method of an air conditioner according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a control method of an air conditioner according to a second embodiment of the present invention;
FIG. 5 is a flowchart illustrating a control method of an air conditioner according to a third embodiment of the present invention;
FIG. 6 is a flowchart illustrating a control method of an air conditioner according to a fourth embodiment of the present invention;
FIG. 7 is a flow chart illustrating a fifth embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 8 is a flowchart illustrating a control method of an air conditioner according to a sixth embodiment of the present invention;
FIG. 9 is a flowchart illustrating a seventh exemplary embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 10 is a functional block diagram of an air conditioner according to the present invention;
fig. 11 is a functional block diagram of an air conditioner controller unit according to 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.
The invention provides an air conditioner, as shown in figure 1, the air conditioner comprises an outdoor heat exchanger 1, a first throttling unit 2, an indoor heat exchanger 3, a four-way valve 4, a compressor 5, an inner fan 6 and an outer fan 7, wherein the indoor heat exchanger 3 and the inner fan 6 are arranged in an indoor unit, the outdoor heat exchanger 1, the four-way valve 4, the compressor 5 and the outer fan 7 are arranged in an outdoor unit, a refrigerant circularly flows in a refrigerant pipe passing through the outdoor heat exchanger 1, the first throttling unit 2, the refrigerant pipe of the indoor heat exchanger 3, the four-way valve 4 and the compressor 5 to finish refrigeration or heating, and a passage through which the refrigerant circularly flows forms an air conditioner pipeline. Specifically, when the air conditioner operates in a heating mode, the refrigerant in the pipeline flows to the direction shown by the solid arrow in fig. 1, the air conditioner controls the compressor 5 to operate, and controls the reversing of the four-way valve 4, so that the refrigerant in the pipeline is compressed by the compressor 5 to form a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant flows out of an exhaust port of the compressor 5, heat is released by the indoor heat exchanger 3, hot air is sent out to the room through the inner fan 7 to be changed into a low-temperature refrigerant in a gas-liquid mixed state, the temperature and the pressure of the refrigerant are further reduced to be changed into a low-temperature liquid refrigerant through the throttling of the first throttling unit 2, heat is absorbed by the outdoor heat exchanger 1, cold air is sent out to the outside through the outdoor fan 6, the temperature of the refrigerant is increased to be the; when the air conditioner operates in a refrigeration mode, the refrigerant in the pipeline flows in the direction shown by a dotted arrow in fig. 1, the refrigerant in the pipeline is compressed by the compressor 5 to form a high-temperature high-pressure gaseous refrigerant, the refrigerant is changed into a medium-temperature high-pressure liquid refrigerant by releasing heat by the outdoor heat exchanger 1, hot air is sent out to the outside by the outdoor fan 7, the temperature and the pressure of the refrigerant are further reduced to be changed into a low-temperature low-pressure gaseous liquid refrigerant after being throttled by the first throttling unit 2, then the refrigerant enters the indoor heat exchanger 3 to absorb heat to be changed into a medium-temperature low-pressure gaseous refrigerant, at the moment, the low temperature on the indoor heat exchanger is sent out to the indoor by the inner fan 6, and.
The outdoor unit of the air conditioner further includes a second throttling unit 12, the second throttling unit 12 includes a throttling part 121 and an electromagnetic valve 122 connected in series, the second throttling unit 12 is connected in parallel to two ends of the first throttling unit 2 to form a refrigerant bypass, and the electromagnetic valve 122 is used for controlling the opening and closing of the refrigerant bypass. Specifically, the air conditioner controls the on-off state of the electromagnetic valve 122 to control the opening and closing of the refrigerant bypass. Because the second throttling unit 12 is additionally arranged in the outdoor unit of the air conditioner, when the first throttling unit 2 is detected to be blocked, the air conditioner can control the refrigerant bypass formed by the second throttling unit 12 to be opened through controlling the electromagnetic valve 122 so as to maintain the normal circulation work of the current refrigerant of the air conditioner in a pipeline of the air conditioner, and the situation that the air conditioner cannot work normally due to overhigh temperature rise of a compressor shell caused by the blockage of the first throttling unit 2 is avoided.
Specifically, the throttling component in the first throttling unit 2 is a capillary tube, and may also be an electronic expansion valve shown in fig. 2, and the opening of the electronic expansion valve may be adjusted by an instruction sent by an air conditioner; the throttling part 121 in the second throttling unit is a capillary tube.
The air conditioner also comprises a temperature sensor 14 and a controller which are arranged on the shell of the compressor 5, wherein the temperature sensor 14 is used for detecting the shell temperature TK of the compressor. The temperature sensor 14 can be arranged outside the shell of the compressor and is attached to the surface of the shell to detect the temperature value of the shell, the controller can be arranged in an outdoor unit or an indoor unit of the air conditioner, the controller judges whether the first throttling unit 2 is blocked according to the shell temperature parameter TK of the compressor 5 detected by the temperature sensor 14, and when the blockage is determined, the electromagnetic valve 122 is controlled to be opened to enable the second throttling unit 12 to be connected into a pipeline of the air conditioner so as to throttle a refrigerant in the pipeline.
The air conditioner can also further comprise a temperature sensor 8 which is arranged in the outdoor unit and used for detecting the outdoor environment temperature T4, a temperature sensor 9 for detecting the coil temperature T3 of the outdoor heat exchanger 1, a discharge temperature sensor 13 for detecting the discharge port temperature TP of the compressor 5, a temperature sensor 11 which is arranged in the indoor unit and used for detecting the indoor environment temperature T1 and a temperature sensor 10 for detecting the coil temperature T2 of the indoor heat exchanger 3, and the air conditioner can timely control the operation of the indoor fan 7 and the outdoor fan 6 and the frequency of the compressor 5 based on the detection of the temperature values so as to meet the cooling or heating operation requirement set by a user. According to the air conditioner provided by the embodiment of the invention, the second throttling unit 12 formed by serially connecting the throttling part 121 and the electromagnetic valve 122 is connected in parallel to the first throttling unit 2, the shell of the compressor 5 is provided with the temperature sensor 14 to detect the shell temperature TK of the compressor, and the electromagnetic valve 122 is controlled to be opened when the first throttling unit 2 is blocked according to the shell temperature TK, so that the second throttling unit 12 is connected into a pipeline of the air conditioner to throttle a refrigerant in the pipeline. Compared with the existing single throttling component, the air conditioner provided by the embodiment of the invention is additionally provided with the second throttling unit 12, and the emergency second throttling unit can be started to continue throttling when the first throttling unit is blocked, so that the problem of compressor failure caused by overhigh temperature rise of a compressor shell due to blockage of the throttling component is avoided.
The present invention also provides an air conditioner control method, based on the above air conditioner, in which an indoor unit and an outdoor unit of the air conditioner are connected by a first throttling unit 2 and a second throttling unit 12 connected in parallel with the first throttling unit 2, the second throttling unit 12 includes a throttling component 121 and an electromagnetic valve 122 connected in series, a sensor 14 for detecting a temperature of a shell of a compressor is provided on a compressor 5 of the air conditioner, as shown in fig. 3, the air conditioner control method includes:
step S100, obtaining a shell temperature TK of the compressor 5;
step S200, judging whether TK > TC1 is established, wherein TC1 is a first preset temperature value, and TC1 is greater than 135 ℃;
and step S300, when TK > TC1 and the duration exceeds tm1, determining that the first throttling unit 2 is blocked, and controlling the electromagnetic valve 122 to be opened to enable the second throttling unit 12 to be connected into an air conditioner pipeline, wherein tm1 is the first preset time, and 8 minutes < tm1<12 minutes.
Because the compressor 5 continuously compresses the low-temperature and low-pressure refrigerant entering from the inlet in the working process and sends the high-temperature and high-pressure refrigerant out of the exhaust outlet, the refrigerant provides the power for the flowing of the refrigerant for the pipeline of the whole air conditioner, and in the process that the compressor 5 compresses the low-temperature refrigerant, the refrigerant simultaneously plays a role of cooling the mechanical parts of the compressor 5 for compressing, if the flow quantity of the refrigerant is reduced due to the blockage of the throttling part in the pipeline, the refrigerant entering the compressor 5 is also reduced, therefore, the refrigerant compressed by the compressor 5 is reduced, the function of cooling the mechanical parts of the compressor 5 is also reduced, so that the temperature of the mechanical parts of the compressor 5 is increased, the shell temperature of the compressor 5 connected with the mechanical parts is also increased, and the part with the smallest cross section area through which the refrigerant flows in the pipeline of the air conditioner is the throttling part, therefore, when the compressor 5 is blocked, for example, the throttling part is the most frequently blocked place when oil blockage or ice blockage occurs in the pipeline, and whether the throttling part in the pipeline is blocked can be determined by judging whether the shell temperature of the compressor 5 is abnormal.
Specifically, the temperature value TK is determined by judging whether the adjustment of the casing temperature value TK is greater than the first preset value TC1 for the first preset time tm1 is satisfied, where the first preset value TC1 and the first preset time tm1 are determined by experiments, and generally TC11 is greater than 135 ℃, for example, 140 ℃, 8 minutes < tm1<12 minutes, for example, 10 minutes. If the temperature TK of the shell is judged to exceed 140 ℃ in more than 10 minutes, the first throttling unit 2 is judged to be blocked, the electromagnetic valve 122 is controlled to be opened, the second throttling unit 12 is connected to a pipeline of the air conditioner to replace the first throttling unit 2 to throttle the refrigerant, and then the normal circulation of the refrigerant in the pipeline of the air conditioner is maintained.
According to the air conditioner control method, the shell temperature TK of the compressor 5 is detected and obtained, whether the shell temperature continuously exceeds the first preset time and is larger than the first preset temperature value or not is judged, the blockage of the first throttling unit 2 of the compressor 5 is judged, the electromagnetic valve 122 is controlled to be opened, the second throttling unit 12 is connected to a pipeline of the air conditioner, the first throttling unit 2 is replaced to throttle the refrigerant left and right, the normal circulation of the refrigerant in the air conditioner pipeline is maintained, and the problem that the shell of the compressor 5 is overhigh in temperature due to the blockage of the first throttling unit 2 and the fault is caused is solved.
Further, based on the first embodiment of the air conditioner control method of the present invention, in the second embodiment of the air conditioner control method of the present invention, as shown in fig. 4, the first throttling unit 2 of the air conditioner is a capillary tube, and when TK > TC1 does not hold, the air conditioner control method further includes:
step S301, judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
step S302, when TC2< TK is less than or equal to TC1, detecting and acquiring continuous operation time tcn of the compressor 5;
step S303, judging tcn > tm2, wherein tm2 is a second preset time, and 38 minutes < tm1<43 minutes;
step S304, when tcn > tm2, detecting and acquiring an operation current value Icomp of the compressor 5 and an exhaust temperature value TP of the compressor;
step S305, determining whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < I0< 1.5A;
step S306, when Icomp < I0, judging whether TP > TC3 is true, wherein TC3 is a third preset temperature value, and 89 is equal to or greater than TC3 and equal to or less than 92 ℃;
and step S307, when TP > TC3 and the duration time exceeds a third preset time tm3, determining that the first throttling unit 2 is blocked, and controlling the electromagnetic valve 122 to be opened so as to enable the second throttling unit 12 to be connected into an air conditioner pipeline, wherein 0.5 minute < tm3<2 minutes.
In this embodiment, based on the first embodiment, specifically in the case where the first throttling unit 2 is a capillary tube, when it is detected that the casing temperature TK of the compressor 5 is lower than the first preset temperature TC1, other detection parameters including the compressor continuous operation time tcn, the compressor 5 operation current Icomp, and the exhaust temperature TP of the compressor 5 are introduced, and it is further comprehensively determined whether the first throttling unit 2 is clogged.
Taking a specific judgment step as an example, where TC2 takes a value of 140 ℃, TC2 takes a value of 120 ℃, tm2 takes a value of 40 minutes, I0 takes a value of 1A, TC3 takes a value of 90 ℃, tm3 takes a value of 1 minute, when the temperature of 120 ℃ < TK < 140 ℃, and after the compressor 5 continuously operates for 40 minutes, when the operating current value Icomp of the compressor 5 is judged to be less than 1A, and the duration time exceeds 1 minute under the condition that the exhaust temperature TP is greater than 90 ℃, it is judged that the first throttling unit 2 is blocked, and at this time, the electromagnetic valve 122 is controlled to be opened to enable the second throttling unit to be connected to the air conditioner pipeline. When the refrigerant flow is reduced due to the blockage of the pipeline, the power of the compressor 5 is reduced, namely the running current is reduced, and meanwhile, the exhaust temperature is relatively reduced, the exhaust temperature of normal refrigeration can reach more than 120 ℃, and whether the throttling component is blocked or not can be obtained by introducing the new parameter comprehensive judgment.
Further, based on the second embodiment of the air conditioner control method according to the present invention, in a third embodiment of the air conditioner control method according to the present invention, as shown in fig. 5, in step S306, when TP > TC3 is not established, the air conditioner control method further includes:
step S308, judging whether TC4 (TP is greater than or equal to TC 3) is true, wherein TC4 is a fourth preset temperature value, and TC4 is greater than or equal to 78 ℃ and less than or equal to 82 ℃;
and step S309, when TC4< TP ≦ TC3 and the duration time exceeds a fourth preset time tm4, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened so that the second throttling unit is connected to the air conditioner pipeline system to work, wherein 18 minutes < tm4<24 minutes.
The difference between this embodiment and the second embodiment is that the detected discharge temperature TP of the compressor is a range value less than or equal to TC3, i.e. the discharge temperature is further decreased, and at this time, the determination of the duration of maintaining the discharge temperature value condition is added, taking a specific determination step as an example, where TC4 is 80 ℃, tm4 is 20 minutes, when the discharge temperature TP satisfies 80 ℃ < TP ≦ 90 ℃, and when the condition is satisfied, the continuous operation time of the compressor 2 exceeds 20 minutes, it is determined that the first throttling unit 2 is blocked, and at this time, the solenoid valve is controlled to be opened to connect the second throttling unit to the air conditioner pipeline.
Further, based on the first embodiment of the air conditioner control method of the present invention, in a fourth embodiment of the air conditioner control method of the present invention, as shown in fig. 6, the first throttling unit 2 of the air conditioner is an electronic expansion valve, and when TK > TC1 does not hold, the air conditioner control method further includes:
step S310, judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
step S311, when TC2< TK is less than or equal to TC1, detecting and acquiring continuous operation time tcn of the compressor 5;
step S312, judging tcn > tm2, wherein tm2 is a second preset time, and 38 minutes < tm1<43 minutes;
step S313, when tcn > tm2, detecting and acquiring an operating current value Icomp of the compressor;
step S314, determining whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < I0< 1.5A;
step S315, when Icomp is less than I0, acquiring the current opening value D of the electronic expansion valve;
step S316, judging whether D is more than Dmax-D1, wherein Dmax is the maximum opening value of the electronic expansion valve, D1 is a preset opening value, and 70 steps are less than D1 and less than 90 steps;
and step S317, when D is more than Dmax-D1 and the duration time exceeds a third preset time tm3, determining that the first throttling unit 2 is blocked, and controlling the electromagnetic valve 122 to be opened so as to enable the second throttling unit to be connected into an air conditioner pipeline, wherein 0.5 min < tm3<2 min.
In this embodiment, based on the first embodiment, specifically, in the case that the first throttling unit 2 is an electronic expansion valve, when it is detected that the casing temperature TK of the compressor 5 is lower than the first preset temperature TC1, other detection parameters including the compressor continuous operation time tcn, the compressor 5 operation current Icomp, and the electronic expansion valve opening value D are introduced, and it is further comprehensively determined whether the first throttling unit 2 is blocked.
Taking a specific judging step as an example, in the above parameters, the TC2 takes 140 ℃, the TC2 takes 120 ℃, the tm2 takes 40 minutes, the I0 takes 1A, the D1 takes 80 steps, and the tm3 takes 1 minute, when the temperature is 120 ℃ and TK is less than or equal to 140 ℃, and after the compressor 5 continuously operates for 40 minutes, when the operating current value Icomp of the compressor 5 is judged to be less than 1A, and the duration time exceeds 1 minute under the condition that the current opening D of the electronic expansion valve is greater than Dmax-80, it is judged that the first throttling unit 2 is blocked, and at this time, the electromagnetic valve 122 is controlled to be opened to enable the second throttling unit 2 to be connected to the air conditioner pipeline. Where Dmax typically takes the value of 480 steps. On the basis of the second embodiment of the control method of the present invention, when the refrigerant flow is reduced due to the sending of a blockage in the pipeline of the air conditioner, in addition to the reduction of the operating current of the compressor 5, the capacity of the air conditioner for sending cold air or hot air by the indoor unit in the cooling or heating mode is insufficient, and under the existing air conditioner control rule, if the cooling or heating capacity of the air conditioner cannot meet the target temperature, i.e., the requirement of the set temperature value, the air conditioner will increase the opening degree of the expansion valve until the set temperature requirement of cooling or heating is met, and when the opening degree of the expansion valve is adjusted to be very close to the maximum opening degree and the set temperature requirement cannot be met for a while, it can be determined that the second throttling unit 2 is blocked.
Further, based on any one of the first to fourth embodiments of the air conditioner control method according to the present invention, in a fifth embodiment of the air conditioner control method according to the present invention, as shown in fig. 7, after determining that the first throttling unit 2 is blocked, the controlling electromagnetic valve 122 is opened to enable the second throttling unit 2 to be connected to the air conditioner pipeline system operating step, the method further includes:
step S411, accumulating the times N for judging the blockage of the first throttling unit;
step S412, when the compressor is started again, whether N is more than or equal to N0 is judged, wherein N0 is a preset numerical value, and N0 is more than or equal to 2 and less than or equal to 5;
and step S413, when N is larger than or equal to N0, determining that the first throttling unit is in a normally blocked state, and controlling the electromagnetic valve to be opened so that the second throttling unit is connected to the air conditioner pipeline system.
When the air conditioner judges that the first throttling unit 2 is blocked and controls the electromagnetic valve 122 to be opened so as to enable the second throttling unit 12 to be connected into the pipeline of the air conditioner, if the compressor 5 is closed in the working process of the air conditioner, for example, the compressor 5 is controlled to be closed because the current indoor environment temperature value T1 reaches the set temperature value TS, or other protections occur so that the compressor 5 is closed, the electromagnetic valve 122 needs to be controlled to be closed after delaying for a short preset time such as 1 minute so as to enable the pressure in the whole pipeline to be balanced, namely, the second throttling unit 12 is controlled to be disconnected from the pipeline of the air conditioner, because the pipeline at the moment can be only temporarily blocked, the recovery is possible when the compressor is started again, and the second throttling unit 12 only temporarily replaces the first throttling unit 2, the throttling effect of the refrigerant is not as good as that of the original second throttling unit 2, especially when the second throttling unit 2 is an electronic expansion valve, the capillary tube of the second throttle unit 12 cannot be adjusted in throttle opening, and therefore, can be used only as an emergency.
Therefore, after the first throttling unit is judged to be blocked in the working process of the compressor, when the compressor is started again, whether the first throttling unit 2 is blocked or not can be detected again, when the compressor 5 is started again each time, if the first throttling unit 2 is detected to be blocked, the blocking times N can be accumulated again, if the blocking times meet the preset times value N0, if the blocking times are 3 times, the first throttling unit 2 can be confirmed to be in a normally blocked state, namely, the times of blocking cannot be recovered in time, so that the electromagnetic valve 122 is directly controlled to be opened when the compressor is started again, and the second throttling unit 122 is connected to an air conditioner pipeline to replace the first throttling unit 2 to throttle the refrigerant.
Further, according to the fifth embodiment of the air conditioner control method of the present invention, in the sixth embodiment of the air conditioner control method of the present invention, as shown in fig. 8, when N ≧ N0 is false, the air conditioner control method further includes:
step S414, judging whether TK is less than or equal to TC 4;
in step S415, when TK is equal to or less than TC4, it is determined that the first throttling unit 2 is clogged and recovered, and the electromagnetic valve 122 is controlled to close.
In the first embodiment, when it is judged that the number of times of clogging of the first throttling unit 2 has not reached N0, that is, the normal clogging state has not been reached, it is recognized as clogging recovery according to a drop of the casing temperature TK below the fourth preset temperature TC 4.
When the pipeline of the air conditioner is not blocked any more, the refrigerant entering the compressor is increased at this time, so that the refrigerant is compressed, and meanwhile, the cooling capacity of mechanical parts for compression of the compressor is also increased, so that the shell temperature of the compressor is reduced, when the temperature is reduced to a fourth preset temperature value TC4, such as below 80 ℃, the pipeline of the compressor is judged to be not blocked, and at this time, the control electromagnetic valve 122 is closed, so that the second throttling unit 12 is disconnected from the pipeline, and the first throttling unit 2 still works.
Further, according to the fifth embodiment of the air conditioner control method of the present invention, in the seventh embodiment of the air conditioner control method of the present invention, as shown in fig. 9, when N ≧ N0 is false, the air conditioner control method further includes:
step S416, judging whether Icomp is greater than or equal to I0;
in step S417, when Icomp is greater than or equal to I0, it is determined that the clogging of the first throttle unit 2 is recovered, and the solenoid valve 122 is controlled to be closed.
Like the sixth embodiment, the electromagnetic valve 122 needs to be controlled to close when the compressor is closed, if the air conditioner pipeline is no longer blocked, the refrigerant entering the compressor increases, so that the work is increased when the mechanical parts of the compressor compress, the power of the compressor increases, so that the operating current Icomp of the compressor increases, when the operating current Icomp increases to a preset value such as above 1A, it is determined that the pipeline of the compressor is not blocked, and the electromagnetic valve 122 is controlled to close, so that the second throttling unit 12 is disconnected from the pipeline, and still works with the first throttling unit 2.
The present invention further provides an air conditioner controller, as shown in fig. 10, the air conditioner includes an indoor unit 200 and an outdoor unit 100, the air conditioner is a variable frequency air conditioner, wherein the indoor unit 200 is provided with an indoor controller 210 for receiving a control command of the air conditioner, the indoor controller 210 further receives an indoor ambient temperature value T1 detected by an ambient temperature sensor 250 and an evaporator temperature value T2 detected by an indoor evaporator flat coil temperature sensor 260 and controls indoor unit loads of the air conditioner, such as an inner fan 220 and a stepping motor for controlling a horizontal air guide bar 230, etc., the outdoor unit 100 is also provided with an outdoor controller 110, the outdoor unit is further provided with a compressor driving module 120 and an outer fan driving module 140, the compressor driving module 120 controls the operation of the compressor 150 under the control of the outdoor unit controller 110, the outer fan driving module controls the operation of the outer fan 160 under the control of the outdoor unit controller 110, the outdoor controller 110 further receives parameter values detected by sensors, and specifically includes a temperature sensor T3 for detecting an outdoor condenser coil temperature value T3, a temperature sensor T4 for detecting an outdoor environment temperature value T4, a sensor 190 for detecting a compressor 150 casing temperature value TK, and a sensor 1a0 for detecting a compressor 150 exhaust temperature value TP, the indoor controller 210 and the outdoor controller 110 establish communication through a current loop, the outdoor controller 210 can generate the detected parameter values to the indoor controller 110, and the indoor controller 110 sends an outdoor control command of the air conditioner to the outdoor controller 110 to control outdoor loads such as the compressor 150, the outdoor fan 160, the four-way valve 110, and the like to operate. Wherein an indoor unit controller or an outdoor unit controller unit is shown in fig. 11, the controller includes a memory 20, a processor 10, and an air conditioner control program 30 stored on the memory 20 and operable on the processor 10, and the air conditioner control program 30 implements the air conditioner cooling start control method in the above-described embodiment when executed by the processor 10.
For example, the air conditioner control program 30 may be used to execute the instructions of the air conditioner cooling start control method in the following steps:
step S100, detecting and acquiring a shell temperature TK of the compressor 5;
step S200, judging whether TK > TC1 is established, wherein TC1 is a first preset temperature value, and TC1 is greater than 135 ℃;
and step S300, when TK > TC1 and the duration exceeds tm1, determining that the first throttling unit 2 is blocked, and controlling the electromagnetic valve 122 to be opened to enable the second throttling unit 12 to be connected into an air conditioner pipeline, wherein tm1 is the first preset time, and 8 minutes < tm1<12 minutes.
The present invention also provides a computer readable storage medium, as shown in fig. 11, the computer readable storage medium stores a control method program 30 of the air conditioner, the computer readable storage medium may be a memory 20 connected to the controller 10 of the air conditioner, or may be a FLASH memory, or may be a portable memory that can be used in a mobile manner, such as a U-disk, an SD card, etc., the memory 20 may also be integrated in the controller 30, and is a built-in memory of the controller 30. The air conditioner control program is executed by the processor to implement the air conditioner cooling start control method in the above embodiments.
For example, the air conditioner control program may be used to execute the instructions of the air conditioner start-up control method in the steps of:
step S100, detecting and acquiring a shell temperature TK of the compressor 5;
step S200, judging whether TK > TC1 is established, wherein TC1 is a first preset temperature value, and TC1 is greater than 135 ℃;
and step S300, when TK > TC1 and the duration exceeds tm1, determining that the first throttling unit 2 is blocked, and controlling the electromagnetic valve 122 to be opened to enable the second throttling unit 12 to be connected into an air conditioner pipeline, wherein tm1 is the first preset time, and 8 minutes < tm1<12 minutes.
In the description herein, references to the description of the terms "first embodiment," "second embodiment," "example," etc., mean that a particular method, apparatus, or feature 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, methods, apparatuses, 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.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A control method of an air conditioner is characterized in that an indoor unit and an outdoor unit of the air conditioner are connected through a first throttling unit and a second throttling unit which is connected with the first throttling unit in parallel, the second throttling unit comprises a throttling component and an electromagnetic valve which are connected with each other in series, a sensor for detecting the temperature of a shell of the compressor is arranged on a compressor of the air conditioner, and the control method of the air conditioner comprises the following steps:
obtaining a shell temperature value TK of the compressor;
judging whether TK > TC1 is established, wherein TC1 is a first preset temperature value, and TC1 is greater than 135 ℃;
when TK > TC1 and the duration exceeds tm1, determining that the first throttling unit is blocked, controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected into an air conditioner pipeline, wherein tm1 is a first preset time, and 8 minutes < tm1<12 minutes;
the first throttling unit is a capillary tube, and when TK > TC1 is not established, the air conditioner control method further comprises the following steps:
detecting tcn a continuous run time of the compressor;
judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
when TC2< TK is not more than TC1, judging whether tcn > tm2 is established, wherein tm2 is a second preset time, and 38 minutes < tm1<43 minutes;
when tcn > tm2, detecting and acquiring an operation current value Icomp of the compressor and a discharge temperature value TP of the compressor;
judging whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < tm1< 1.5A;
when Icomp < I0, judging whether TP > TC3 is established, wherein TC3 is a third preset temperature value, and TC3 is more than or equal to 89 and less than or equal to 92 ℃;
when TP > TC3 and the duration exceeds a third preset time tm3, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected into the air conditioner pipeline, wherein 0.5 min < tm3<2 min.
2. The air conditioner controlling method as claimed in claim 1, wherein when Icomp < I0, it is judged that TP > TC3 is not established, the air conditioner controlling method further comprises:
judging that TC4 is greater than or equal to TP and less than or equal to TC3, wherein TC4 is a fourth preset temperature value, and TC4 is greater than or equal to 78 ℃ and less than or equal to 82 ℃;
when TC4< TP ≦ TC3 and the duration time exceeds a fourth preset time tm4, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected to the air conditioner pipeline system to work, wherein 18 minutes < tm4<24 minutes.
3. The air conditioner controlling method as claimed in claim 1, wherein the first throttling unit is an electronic expansion valve, and when TK > TC1 is not established, the air conditioner controlling method further comprises:
judging whether TC2< TK is not less than TC1, wherein TC2 is a second preset temperature value, and TC2 is not less than 118 ℃ and not more than 122 ℃;
when TC2< TK is not more than TC1, detecting and acquiring continuous running time tcn of the compressor, and judging whether tcn > tm2 is established, wherein tm2 is second preset time, and 38 minutes < tm1<43 minutes;
when tcn > tm2, detecting and acquiring an operating current value Icomp of the compressor;
judging whether Icomp < I0 is true, wherein I0 is a first preset current value, and 0.8A < I0< 1.5A;
when Icomp is less than I0, acquiring the current opening value D of the electronic expansion valve, and judging whether D is greater than Dmax-D1, wherein Dmax is the maximum opening value of the electronic expansion valve in operation, D1 is a preset opening value, and 70 steps are less than D1 and less than 90 steps;
when D is more than Dmax-D1 and the duration time exceeds a third preset time tm3, determining that the first throttling unit is blocked, and controlling the electromagnetic valve to be opened to enable the second throttling unit to be connected to the air conditioner pipeline, wherein 0.5 min < tm3<2 min.
4. The air conditioner controlling method according to any one of claims 1 to 3, further comprising, after the step of determining that the first throttling unit is blocked and controlling the solenoid valve to be opened to switch the second throttling unit into the air conditioner pipe system, the step of operating:
accumulating the times N for judging the blockage of the first throttling unit;
when the compressor is started again, judging whether N is more than or equal to N0, wherein N0 is a preset numerical value, and N0 is more than or equal to 2 and less than or equal to 5;
and when N is larger than or equal to N0, determining that the first throttling unit is in a normally blocked state, and controlling the electromagnetic valve to be opened so that the second throttling unit is connected into the air conditioner pipeline system.
5. The air conditioner controlling method as claimed in claim 4, wherein when N ≧ N0 is not established, the air conditioner controlling method further comprises:
when the compressor is started again, judging whether TK is less than or equal to TC 2;
and when TK is less than or equal to TC2, determining that the blockage of the first throttling unit is recovered, and controlling the electromagnetic valve to be closed.
6. The air conditioner controlling method as claimed in claim 4, wherein when N ≧ N0 is not established, the air conditioner controlling method further comprises:
judging whether Icomp is greater than or equal to I0;
when Icomp is larger than or equal to I0, the blockage of the first throttling unit is determined to be recovered, and the electromagnetic valve is controlled to be closed.
7. An air conditioner controller provided in an indoor unit or an outdoor unit of an air conditioner, the controller comprising a memory, a processor, and an air conditioner control program stored on the memory and executable on the processor, the air conditioner control program when executed by the processor implementing the air conditioner control method according to any one of claims 1 to 6.
8. A computer-readable storage medium, characterized in that an air conditioner control program is stored thereon, which when executed by a processor implements the steps of the air conditioner control method according to any one of claims 1 to 6.
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| CN110190418A (en) * | 2019-05-27 | 2019-08-30 | 上海本菱涡旋压缩机有限公司 | High current seal wiring seat based on heat pipe heat exchanging |
| CN112015090A (en) * | 2019-05-29 | 2020-12-01 | 珠海格力电器股份有限公司 | Electronic equipment control method and device |
| CN111706959B (en) * | 2020-06-15 | 2022-03-29 | 青岛海尔空调器有限总公司 | Electronic expansion valve fault detection method and device for multi-split air conditioner and air conditioner |
| CN112556090B (en) * | 2020-12-11 | 2022-07-08 | 四川长虹空调有限公司 | Method for detecting blockage of air conditioning system |
| CN112524774A (en) * | 2020-12-17 | 2021-03-19 | 广东积微科技有限公司 | Device for improving reliability of air conditioning system and control method |
| CN112928872A (en) * | 2021-01-20 | 2021-06-08 | 广东韶钢松山股份有限公司 | Temperature monitoring method and system for water-cooled exciter |
| CN113280468A (en) * | 2021-06-15 | 2021-08-20 | 佛山市顺德区美的电子科技有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| CN115727576A (en) * | 2022-11-16 | 2023-03-03 | 宁波奥克斯电气股份有限公司 | Multi-capillary device and blockage cleaning control method |
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