CN113531762A - Air conditioner control method and device and air conditioner - Google Patents
Air conditioner control method and device and air conditioner Download PDFInfo
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- CN113531762A CN113531762A CN202110677983.2A CN202110677983A CN113531762A CN 113531762 A CN113531762 A CN 113531762A CN 202110677983 A CN202110677983 A CN 202110677983A CN 113531762 A CN113531762 A CN 113531762A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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Abstract
The invention discloses an air conditioner control method, an air conditioner control device and an air conditioner, and relates to the technical field of air conditioners, wherein the air conditioner control method comprises the following steps: when the compressor meets the preset low-temperature shutdown condition, controlling a compressor driving module to heat an oil pool of the compressor; monitoring a module temperature of a compressor drive module; and controlling the output power of the compressor driving module based on the module temperature so as to enable the module temperature to be less than the preset protection temperature. The starting reliability of the compressor under the low-temperature working condition is improved, other heating parts do not need to be additionally arranged on the compressor, the whole machine cost is saved, the compressor driving module can be prevented from being burnt due to continuous work and heating, and the running stability of the compressor driving module is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and an air conditioner.
Background
At present, after the air conditioner is shut down in a hot operation mode, most of the refrigerant of the air conditioner is deposited in the form of liquid refrigerant in the outdoor unit due to low outdoor environment temperature and cold tendency of the refrigerant, so that the reliability of starting the compressor is low.
In order to ensure the reliability of restarting the compressor, in the prior art, a crankshaft heating belt is usually added at the bottom of the compressor (at an oil pool), and the crankshaft heating belt is controlled to be opened so as to ensure that the liquid refrigerant in the oil pool of the compressor is completely evaporated in a shutdown state.
Disclosure of Invention
In order to solve the problems, the invention provides an air conditioner control method, an air conditioner control device and an air conditioner, which improve the starting reliability of a compressor under a low-temperature working condition, do not need to additionally arrange a crankshaft heating belt on the compressor, save the whole machine cost, avoid the compressor driving module from being burnt due to continuous work and heating and improve the running stability of the compressor driving module.
According to an embodiment of the present invention, there is provided an air conditioner control method including: when the compressor meets a preset low-temperature shutdown condition, controlling a compressor driving module to heat an oil pool of the compressor; monitoring a module temperature of the compressor drive module; and controlling the output power of the compressor driving module based on the module temperature so that the module temperature is less than a preset protection temperature.
By adopting the technical scheme, under the condition that the compressor is shut down at a low temperature, the compressor is heated based on the compressor driving module, so that the oil temperature of the compressor can be increased, the liquid refrigerant in the oil pool is evaporated, the influence on the starting-up starting of the compressor is avoided, the starting-up reliability of the compressor is improved, other parts do not need to be additionally arranged on the compressor, and the cost of the whole compressor is saved; by controlling the operating frequency of the compressor driving module, the compressor driving module can be prevented from being burnt down due to heat generated by continuous work, and the operating stability of the compressor driving module is improved.
Preferably, when the compressor meets a preset low-temperature shutdown condition, the step of controlling the compressor driving module to heat the oil sump of the compressor includes: when the compressor is stopped, detecting the stop duration of the compressor, monitoring the outdoor environment temperature and monitoring the exhaust temperature of the compressor; judging whether the compressor meets a preset low-temperature shutdown condition or not based on the shutdown time, the outdoor environment temperature and the exhaust temperature; and if so, controlling the compressor driving module to heat an oil pool of the compressor.
Through adopting above-mentioned technical scheme, judge whether the compressor satisfies predetermined low temperature shut-down condition based on the exhaust temperature of the compressor is long when shutting down of compressor, outdoor ambient temperature and compressor, can accurately judge whether the compressor has appeared the sedimentary condition of liquid refrigerant in the oil bath, through the oil bath heating for the compressor, guarantee that the compressor has lasting heat input at the shutdown state, guarantee the evaporation of liquid refrigerant, promoted the start reliability of compressor.
Preferably, the step of determining whether the compressor satisfies a preset low-temperature shutdown condition based on the shutdown duration, the outdoor ambient temperature, and the discharge temperature includes: and when the outdoor environment temperature is less than a first preset temperature, the exhaust temperature is less than a second preset temperature, and the shutdown duration is longer than the first preset duration, determining that the compressor meets a preset low-temperature shutdown condition.
By adopting the technical scheme, the temperature threshold value corresponding to the preset low-temperature shutdown condition and the shutdown time threshold value are set, whether the oil pool of the compressor needs to be heated or not can be accurately judged, energy waste caused by continuous and long-time heating is avoided, and the energy consumption of the air conditioner is saved.
Preferably, the step of controlling the compressor driving module to heat the oil sump of the compressor includes: and controlling the compressor driving module to start and operate at a first preset power to electrify a winding coil of the compressor.
By adopting the technical scheme, the compressor driving module is controlled to start and operate at a fixed frequency, so that the motor winding of the compressor can be continuously electrified by the outer machine driving module, and the liquid refrigerant is prevented from being deposited in the oil tank of the compressor.
Preferably, the step of controlling the output power of the compressor driving module based on the module temperature so that the module temperature is less than a preset protection temperature includes: when the compressor driving module is started, acquiring the current module temperature every second preset time interval; if the current module temperature is smaller than a second temperature threshold value, controlling the compressor driving module to operate at a first preset power; and if the current module temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold, controlling the compressor driving module to reduce the second preset power to operate every third preset time interval.
By adopting the technical scheme, the current module temperature of the compressor driving module is periodically detected, when the module temperature is higher, the output power of the compressor driving module is periodically controlled to be reduced, the heat generation can be reduced, the temperature rising speed is reduced, and the stable operation of the compressor driving module can be ensured under the shutdown condition.
Preferably, the air conditioner control method further includes: and if the current module temperature is greater than or equal to the third temperature threshold value, controlling the compressor driving module to stop running.
Through adopting above-mentioned technical scheme, when compressor drive module's module temperature was too high, control its in time shutdown, avoid making the module temperature rise again, prevent that compressor drive module from being burnt out, promoted the security of air conditioner.
Preferably, the air conditioner control method further includes: after the compressor driving module stops running, if the temperature of the module is detected to be smaller than a first temperature threshold value, controlling the compressor driving module to start running at a first preset power; wherein the first temperature threshold is less than the second temperature threshold.
By adopting the technical scheme, when the compressor driving module stops running and the temperature of the module is reduced to a lower temperature, the compressor driving module is controlled to restart, so that the reliability of starting the compressor is improved while the stable running of the driving module is ensured.
According to an embodiment of the present invention, there is provided an air conditioner control device including: the first control module is used for controlling the compressor driving module to heat an oil pool of the compressor when the compressor meets a preset low-temperature shutdown condition; a monitoring module for monitoring a module temperature of the compressor driving module; and the second control module is used for controlling the output power of the compressor driving module based on the module temperature so as to enable the module temperature to be smaller than the preset protection temperature.
According to an embodiment of the present invention, in another aspect, there is provided an air conditioner including a computer readable storage medium storing a computer program and a processor, the computer program being read by the processor and when executed, implementing the method according to any one of the first aspect.
According to an embodiment of the present invention, in another aspect, a computer-readable storage medium is provided, which stores a computer program, which when read and executed by a processor, implements the method according to any one of the first aspect.
The invention has the following beneficial effects: under the condition that the compressor is shut down at low temperature, the compressor is heated based on the compressor driving module, so that the oil temperature of the compressor can be increased, liquid refrigerant in an oil pool is evaporated, the influence on starting up the compressor again is avoided, the starting up reliability of the compressor under the low-temperature working condition is improved, other heating parts do not need to be additionally arranged on the compressor, and the cost of the whole compressor is saved; by controlling the operating frequency of the compressor driving module, the compressor driving module can be prevented from being burnt down due to heat generated by continuous work, and the operating stability of the compressor driving module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic structural diagram of an air conditioner according to the present invention;
FIG. 2 is a flow chart of a method for controlling an air conditioner according to the present invention;
FIG. 3 is a control logic diagram for compressor drive module protection according to the present invention;
fig. 4 is a schematic structural diagram of an air conditioner control device according to the present invention.
Description of reference numerals:
1-a compressor; 2-high pressure switch; 3-an oil separator; 4-a high pressure sensor; 5-oil return capillary; 6-four-way valve; 7-a filter; 8-gas side stop valve; 9-liquid side stop valve; 10-outdoor heat exchanger; 11-electronic expansion valve; 12-refrigerant radiator; 13-outdoor fan; 14-a gas-liquid separator; 15-a dispenser; 16-a first temperature sensor; 17-a second temperature sensor; 18-a third temperature sensor; 19-a fourth temperature sensor; 20-fifth temperature sensor.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The present embodiment provides an air conditioner, referring to the schematic structural diagram of the air conditioner shown in fig. 1, the air conditioner includes a compressor 1, a high-pressure switch 2, an oil separator 3, a high-pressure sensor 4, an oil return capillary tube 5, a four-way valve 6, a filter 7, an air-side stop valve 8, a liquid-side stop valve 9, an outdoor heat exchanger 10, an electronic expansion valve 11, a refrigerant radiator 12, an outdoor fan 13, a gas-liquid separator 14, a distributor 15, a first temperature sensor 16, a second temperature sensor 17, a third temperature sensor 18, a fourth temperature sensor 19, and a fifth temperature sensor 20.
The first temperature sensor 16 detects a discharge temperature of the compressor, the second temperature sensor 17 detects an intake temperature of the compressor, and the third temperature sensor 18 detects an outdoor ambient temperature. The driving module of the compressor of the air conditioner is cooled by a refrigerant (i.e., the refrigerant radiator 12 in fig. 1), and the fifth temperature sensor 20 is configured to detect a module temperature of the driving module of the compressor.
The present embodiment provides an air conditioner control method, which can be applied to the air conditioner provided in the above embodiments, where the air conditioner includes a compressor and a compressor driving module, see the flow chart of the air conditioner control method shown in fig. 2, and the method mainly includes the following steps S202 to S206:
step S202: and when the compressor meets the preset low-temperature shutdown condition, controlling the compressor driving module to heat an oil pool of the compressor.
The preset low-temperature shutdown condition comprises a temperature condition and a time condition which can cause liquid refrigerant to be deposited in an oil pool of the compressor, when the compressor is in a low-temperature shutdown state for a long time, the liquid refrigerant can be deposited in the oil pool of the compressor, and the compressor is determined to meet the preset low-temperature shutdown condition.
When the compressor meets the preset low-temperature shutdown condition, the compressor driving module is controlled to heat the refrigeration oil in the oil pool at the bottom of the compressor, namely the compressor driving module is controlled to output with certain power, so that the motor of the compressor is promoted to heat, and the refrigeration oil in the oil pool at the bottom of the compressor is heated. The compressor driving module supplies power to the motor winding of the compressor when in work, so that the motor of the compressor generates heat, the oil temperature of the oil pool at the bottom of the compressor can be increased, the temperature of the frozen oil is increased, the liquid refrigerant at the bottom of the oil pool is evaporated, and the phenomenon that the liquid refrigerant is deposited to influence the restart of the compressor is avoided. Because the control mode does not need to additionally install a heating belt for the compressor, the control mode can be universally used for the air conditioner with the compressor driving module installed at will on the basis of saving material cost, and the universality of the control method of the air conditioner is improved.
Step S204: module temperature of the compressor drive module is monitored.
Because the compressor is not started, the compressor driving module continuously generates heat in the process of electrifying the motor winding of the compressor, if the heat cannot be dissipated when the compressor driving module is in a high-temperature state for a long time, the compressor driving module can be burnt, in order to avoid damage of the compressor driving module due to overhigh temperature, in the process of electrifying the motor winding of the compressor based on the compressor driving module, the temperature of the compressor driving module is detected in real time and is recorded as the module temperature.
Step S206: and controlling the output power of the compressor driving module based on the module temperature so as to enable the module temperature to be less than the preset protection temperature.
Because the temperature of the compressor driving module is related to the output power of the compressor driving module, the larger the output power is, the faster the temperature of the compressor driving module rises, the output power of the compressor driving module is timely adjusted according to the change condition of the module temperature of the compressor driving module, so that the temperature of the compressor driving module is prevented from exceeding the preset protection temperature, the compressor driving module is prevented from being burnt, and the preset protection temperature can be any temperature value smaller than the highest temperature value which can be borne by the compressor driving module.
According to the control method of the air conditioner, the compressor is heated based on the compressor driving module under the condition that the compressor is shut down at a low temperature, so that the oil temperature of the compressor can be increased, liquid refrigerants in the oil pool are evaporated, the influence on starting up the compressor again is avoided, the reliability of starting up the compressor under the low-temperature working condition is improved, a crankshaft heating belt is not required to be additionally arranged on the compressor, and the cost of the whole air conditioner is saved; by controlling the operating frequency of the compressor driving module, the compressor driving module can be prevented from being burnt down due to heat generated by continuous work, and the operating stability of the compressor driving module is improved.
In order to improve the reliability of the compressor in the startup operation, the embodiment provides an implementation manner for controlling the compressor driving module to heat the oil sump of the compressor when the compressor meets the preset low-temperature shutdown condition, and the following steps (1) to (3) may be specifically referred to:
step (1): when the compressor is stopped, the stop duration of the compressor is detected, the outdoor environment temperature is monitored, and the exhaust temperature of the compressor is monitored.
After the air conditioner is shut down in heating operation, the exhaust temperature of the compressor is detected in real time based on a first temperature sensor arranged on an exhaust pipe of the compressor, the outdoor environment temperature of the environment outside the compressor is detected in real time based on a third temperature sensor arranged on an outdoor unit, and the shutdown duration of the compressor is recorded based on a timer (the timer is reset before each time is counted).
Step (2): and judging whether the compressor meets a preset low-temperature shutdown condition or not based on the shutdown time, the outdoor environment temperature and the exhaust temperature.
The greater the compressor downtime, the lower the outdoor ambient temperature, and the lower the discharge temperature, the greater the risk of liquid refrigerant deposition in the compressor oil sump.
In a specific embodiment, when the outdoor ambient temperature Ta is less than the first preset temperature T1, the discharge temperature Td is less than the second preset temperature T2, and the shutdown duration is greater than the first preset duration, it is determined that the compressor satisfies the preset low-temperature shutdown condition.
The value range of the first preset temperature can be 1-10 ℃, the preferred value is 5 ℃, and the value range of the second preset temperature can be 5-15 ℃, the preferred value is 10 ℃. The value range of the first preset duration can be 1-3 h, and the preferred value is 2 h. Whether the oil tank of the compressor needs to be heated or not can be accurately judged by setting the temperature threshold value corresponding to the preset low-temperature shutdown condition and the shutdown duration threshold value, and the condition that the energy consumption of the air conditioner is high due to early heating is avoided.
And (3): and if so, controlling the compressor driving module to heat an oil pool of the compressor.
When the outdoor environment temperature is lower than the first preset temperature, the exhaust temperature of the compressor is lower than the second preset temperature and the shutdown time of the compressor is longer than the first preset time, the compressor is in a low-temperature shutdown state for a long time, the risk of liquid refrigerant deposition in the oil tank is high, the compressor driving module is controlled to start and operate at the first preset power, and the winding coil of the compressor is electrified.
The value range of the first preset power Pw1 can be 10w or more and Pw1 or less and 200w, and the compressor driving module is controlled to start and operate at a fixed frequency, so that the external machine driving module can continuously electrify the motor winding of the compressor, and the liquid refrigerant is ensured not to be deposited in the compressor oil pool.
Whether the compressor meets the preset low-temperature shutdown condition is judged through the shutdown time based on the compressor, the outdoor environment temperature and the exhaust temperature of the compressor, whether the compressor deposits liquid refrigerant in an oil pool can be accurately judged, the compressor is guaranteed to have continuous heat input in the shutdown state through oil pool heating of the compressor, evaporation of the liquid refrigerant is guaranteed, and the starting reliability of the compressor is improved.
In order to ensure the safety of the compressor driving module, this embodiment provides an implementation manner of controlling the output power of the compressor driving module based on the module temperature so as to make the module temperature less than the preset protection temperature, and the following steps 1) to 5) may be specifically referred to:
step 1): and when the compressor driving module is started, acquiring the current module temperature at every second preset time interval.
In the process of continuously electrifying the motor winding of the compressor, the compressor driving module continuously generates heat, the heat of the compressor driving module is mainly taken away by means of refrigerant circulation, the refrigerant is not circulated in the state that the compressor is stopped, the heat of the compressor driving module cannot be taken away, if the heat of the compressor driving module is not taken away for a long time, the heat generated by the driving module is too large, and the driving module plate can be caused to lose efficacy when the heat is serious.
In order to ensure that the compressor driving module can stably operate, the current module temperature of the compressor driving module is periodically detected, the detection period is a second preset time, in order to ensure that the compressor driving module cannot be burnt, the second preset time is as short as possible so as to increase the temperature detection frequency of the driving module, and the value range of the second preset time can be 1-5 min.
Step 2): and if the current module temperature is less than the second temperature threshold value, controlling the compressor driving module to operate at a first preset power.
If the current module temperature Tf is less than the second temperature threshold Tf2, that is, if Tf is less than Tf2, it indicates that the heat generated by the compressor driving module is less, and the compressor driving module is controlled to operate at the first preset power Pw1 when being turned on, so as to continuously heat the oil sump of the compressor. The second temperature threshold Tf2 may be 60 ℃ < Tf2 < 85 ℃.
Step 3): and if the current module temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, controlling the compressor driving module to reduce the second preset power to operate every third preset time interval.
If the current module temperature Tf is greater than or equal to the second temperature threshold Tf2 and less than the third temperature threshold Tf3, that is, when Tf2 is greater than or equal to Tf < Tf3, it indicates that the heat generated by the compressor driving module is more, the temperature rises faster, the compressor driving module is controlled to reduce the second preset power a every third preset time interval on the basis of the first preset power Pw1, the value range of the third preset time interval may be 3-10 s, the value range of a may be 2w greater than or equal to a < 20w, and the value range of the third temperature threshold Tf3 may be 60 ℃ < Tf3 < 85 ℃.
Through the current module temperature of periodic detection compressor drive module, when the module temperature is higher, the output power of periodic control compressor drive module reduces, can reduce thermal production, reduces the temperature rising speed, ensures that the module temperature is in normal range, guarantees under the shut down condition that compressor drive module can the steady operation.
Step 4): and if the current module temperature is greater than or equal to the third temperature threshold value, controlling the compressor driving module to stop running.
If the current module temperature Tf is greater than or equal to the third temperature threshold Tf3, that is, if Tf3 is not greater than Tf, it indicates that the heat generated by the compressor driving module is too much, and the temperature of the compressor driving module is too high, the compressor driving module is controlled to stop operating, that is, the power supply to the motor winding of the compressor is stopped. When the temperature of the module of the compressor driving module is too high, the module is controlled to stop running in time, the temperature of the module is prevented from rising again, the compressor driving module is prevented from being burnt, and the safety of the air conditioner is improved.
Step 5): after the compressor driving module stops running, if the temperature of the module is detected to be smaller than a first temperature threshold value, controlling the compressor driving module to start running at a first preset power; wherein the first temperature threshold is less than the second temperature threshold.
And when the current module temperature Tf is detected to be reduced to be less than a first temperature threshold Tf1, namely when Tf is less than Tf1, controlling the compressor driving module to start running again at a first preset power Pw 1. By controlling the compressor driving module to restart when the compressor driving module stops running and the temperature of the module is reduced to a lower temperature, the compressor driving module can continuously provide heat for an oil pool of the compressor while the stable running of the driving module is ensured, liquid refrigerant is prevented from being deposited again, and the reliability of starting the compressor is improved.
The value of the first temperature threshold Tf1 may be 60 ℃ to Tf1 < 85 ℃, and the first temperature threshold Tf1, the second temperature threshold Tf2 and the third temperature threshold Tf3 satisfy 60 ℃ to Tf1 < Tf2 < Tf3 < 85 ℃.
According to the air conditioner control method provided by the embodiment, the compressor oil pool is preheated by driving the compressor driving module, the restarting reliability of the compressor is improved, the output power is adjusted by the module temperature based on the compressor driving module, the module temperature of the compressor driving module is ensured to be in the normal working range, and the running reliability of the compressor is ensured.
Corresponding to the air conditioner control method provided in the foregoing embodiment, an embodiment of the present invention provides an example of protecting a compressor driving module by applying the air conditioner control method, referring to a control logic diagram of protection of the compressor driving module shown in fig. 3, and the following steps S301 to S308 may be specifically referred to for execution:
step S301: when the compressor is shut down, whether Ta < T1 and Td < T2 are met or not and the shutdown time length is more than or equal to T0 is detected. If yes, step S302 is performed, and if no, step S303 is performed.
Step S302: the compressor drive module is controlled to start operation at Pw1 to preheat the compressor.
After the compressor is shut down, whether the air conditioner simultaneously meets three conditions that the outdoor environment temperature Ta is less than T1, the compressor exhaust temperature Td is less than T2 and the shutdown time of the compressor is more than or equal to T0 (first preset time) is detected. When the three conditions are simultaneously met, the compressor driving module is driven to start an oil pool in the preheating compressor at a first preset power Pw 1.
After the air conditioner is shut down at a low temperature, liquid refrigerant is deposited in an outdoor unit, when a certain condition is reached, the environment temperature is low, the exhaust temperature is low, and the shutdown time duration exceeds a certain time, such as the external environment temperature Ta is less than 5 ℃, the exhaust temperature Td is less than 10 ℃, and the shutdown time duration is more than 2h, the driving module of the outdoor unit compressor is controlled to electrify a winding coil of the compressor, so that continuous heat input of the compressor in the shutdown state is ensured, the liquid refrigerant cannot be deposited in an oil tank of the compressor, and the reliability of the compressor when the compressor is restarted is ensured.
Step S303: and controlling the compressor driving module to stop and close.
Step S304: when the compressor driving module is turned on, the current module temperature Tf of the compressor driving module is detected every time t 1.
And S305, when the Tf is less than the Tf2, driving the compressor driving module to run at the power Pw 1.
And S306, when the Tf2 is not more than Tf < Tf3, reducing the power Pw1 of the driving compressor driving module by aW every t2 time.
And S307, when the Tf3 is not more than Tf, the compressor driving module is driven to stop electrifying the motor winding of the compressor.
Wherein Tf1 is more than or equal to 60 ℃ and more than Tf2 and more than Tf3 and more than 85 ℃, Pw1 is more than or equal to 10w and less than 200w, and a is more than or equal to 2w and less than 20 w.
And S308, driving the compressor driving module to be started again at the power Pw1 when the Tf < Tf1 is detected.
In correspondence to the air conditioner control method provided in the above embodiment, an embodiment of the present invention provides an air conditioner control device, which can be applied to an air conditioner, and referring to a schematic structural diagram of the air conditioner control device shown in fig. 4, the device includes the following modules:
and the first control module 41 is used for controlling the compressor driving module to heat the oil pool of the compressor when the compressor meets the preset low-temperature shutdown condition.
A monitoring module 42 for monitoring a module temperature of the compressor drive module.
And a second control module 43, configured to control the output power of the compressor driving module based on the module temperature, so that the module temperature is less than the preset protection temperature.
According to the air conditioner control device provided by the embodiment, under the condition that the compressor is stopped at a low temperature, the compressor is heated based on the compressor driving module, so that the oil temperature of the compressor can be increased, a liquid refrigerant in the oil pool is evaporated, the influence on the restarting of the compressor is avoided, the reliability of the starting of the compressor under the low-temperature working condition is improved, other heating parts do not need to be additionally arranged on the compressor, and the cost of the whole machine is saved; by controlling the operating frequency of the compressor driving module, the compressor driving module can be prevented from being burnt down due to heat generated by continuous work, and the operating stability of the compressor driving module is improved.
In one embodiment, the first control module 41 is further configured to detect a shutdown duration of the compressor, monitor an outdoor environment temperature, and monitor a discharge temperature of the compressor when the compressor is shutdown; judging whether the compressor meets a preset low-temperature shutdown condition or not based on the shutdown duration, the outdoor environment temperature and the exhaust temperature; and if so, controlling the compressor driving module to heat an oil pool of the compressor.
In one embodiment, the first control module 41 is further configured to determine that the compressor meets a preset low-temperature shutdown condition when the outdoor environment temperature is less than a first preset temperature, the discharge temperature is less than a second preset temperature, and the shutdown duration is greater than the first preset duration.
In one embodiment, the first control module 41 is further configured to control the compressor driving module to start operation at a first preset power to energize the winding coil of the compressor.
In one embodiment, the second control module 43 is further configured to obtain the current module temperature every second preset time interval when the compressor driving module is turned on; if the current module temperature is smaller than a second temperature threshold value, controlling the compressor driving module to operate at a first preset power; and if the current module temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, controlling the compressor driving module to reduce the second preset power to operate every third preset time interval.
In an embodiment, the second control module 43 is further configured to control the compressor driving module to stop operating when the current module temperature is greater than or equal to a third temperature threshold.
In an embodiment, the second control module 43 is further configured to control the compressor driving module to start to operate at a first preset power if the detected module temperature is less than the first temperature threshold after the compressor driving module stops operating; wherein the first temperature threshold is less than the second temperature threshold.
The above-mentioned air conditioner controlling means that this embodiment provided preheats the mode to compressor oil sump through driving compressor drive module, has promoted the reliability of compressor restart, through the module temperature regulation output based on compressor drive module, ensures that compressor drive module's module temperature is in normal operating range to the reliability of compressor operation has been guaranteed.
Corresponding to the air conditioner control method provided by the above embodiment, the present embodiment provides an air conditioner including a processor and a computer-readable storage medium storing a computer program, where the computer program is read and executed by the processor to implement the air conditioner control method provided by the above embodiment.
The present embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the air conditioner control method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The air conditioner control device and the air conditioner disclosed by the embodiment correspond to the air conditioner control method disclosed by the embodiment, so that the description is relatively simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An air conditioner control method, comprising:
when the compressor meets a preset low-temperature shutdown condition, controlling a compressor driving module to heat an oil pool of the compressor;
monitoring a module temperature of the compressor drive module;
and controlling the output power of the compressor driving module based on the module temperature so that the module temperature is less than a preset protection temperature.
2. The air conditioner control method as claimed in claim 1, wherein the step of controlling the compressor driving module to heat the oil sump of the compressor when the compressor satisfies a preset low temperature stop condition comprises:
when the compressor is stopped, detecting the stop duration of the compressor, monitoring the outdoor environment temperature and monitoring the exhaust temperature of the compressor;
judging whether the compressor meets a preset low-temperature shutdown condition or not based on the shutdown time, the outdoor environment temperature and the exhaust temperature;
and if so, controlling the compressor driving module to heat an oil pool of the compressor.
3. The air conditioner controlling method as claimed in claim 2, wherein the step of determining whether the compressor satisfies a preset low temperature stop condition based on the stop time period, the outdoor ambient temperature and the discharge temperature comprises:
and when the outdoor environment temperature is less than a first preset temperature, the exhaust temperature is less than a second preset temperature, and the shutdown duration is longer than the first preset duration, determining that the compressor meets a preset low-temperature shutdown condition.
4. The air conditioner controlling method as claimed in claim 2, wherein the step of controlling the compressor driving module to heat the oil sump of the compressor comprises:
and controlling the compressor driving module to start and operate at a first preset power to electrify a winding coil of the compressor.
5. The air conditioner controlling method as claimed in claim 1, wherein the step of controlling the output power of the compressor driving module based on the module temperature so that the module temperature is less than a preset protection temperature comprises:
when the compressor driving module is started, acquiring the current module temperature every second preset time interval;
if the current module temperature is smaller than a second temperature threshold value, controlling the compressor driving module to operate at a first preset power;
and if the current module temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold, controlling the compressor driving module to reduce the second preset power to operate every third preset time interval.
6. The air conditioner controlling method as claimed in claim 5, further comprising:
and if the current module temperature is greater than or equal to the third temperature threshold value, controlling the compressor driving module to stop running.
7. The air conditioner controlling method as claimed in claim 6, further comprising:
after the compressor driving module stops running, if the temperature of the module is detected to be smaller than a first temperature threshold value, controlling the compressor driving module to start running at a first preset power; wherein the first temperature threshold is less than the second temperature threshold.
8. An air conditioner control device, comprising:
the first control module is used for controlling the compressor driving module to heat an oil pool of the compressor when the compressor meets a preset low-temperature shutdown condition;
a monitoring module for monitoring a module temperature of the compressor driving module;
and the second control module is used for controlling the output power of the compressor driving module based on the module temperature so as to enable the module temperature to be smaller than the preset protection temperature.
9. An air conditioner comprising 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 method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-7.
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| CN202110677983.2A CN113531762A (en) | 2021-06-18 | 2021-06-18 | Air conditioner control method and device and air conditioner |
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| CN202110677983.2A CN113531762A (en) | 2021-06-18 | 2021-06-18 | Air conditioner control method and device and air conditioner |
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| CN118066644A (en) * | 2024-04-18 | 2024-05-24 | 宁波奥克斯电气股份有限公司 | Air conditioner protection control method and device, air conditioner and medium |
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