阅读说明：本技术 一种压缩机预热控制方法、装置及空调器 (Compressor preheating control method and device and air conditioner ) 是由 刘合心 陈华 邓赛峰 宋磊 李理科 于 2021-06-18 设计创作，主要内容包括：本发明公开了一种压缩机预热控制方法、装置及空调器,涉及空调技术领域,上述压缩机预热控制方法包括：当压缩机停机时,判断压缩机是否满足预设低温停机条件；如果是,控制压缩机驱动模块为压缩机的电机绕组通电；获取压缩机驱动模块的模块温度,基于模块温度对外风机的风挡进行控制,以使模块温度小于预设保护温度；其中,压缩机驱动模块的散热器处于室外风机的风道上。本发明可以促使电机发热以使压缩机内的油池温度升高,避免压缩机内出现液态冷媒沉积,提升了压缩机再次启动的可靠性,且无需加装曲轴加热带,节约了整机成本,还可以确保压缩机驱动模块的温度处于正常范围内,提升了压缩机预热控制的可靠性。(The invention discloses a compressor preheating control method, a compressor preheating control device and an air conditioner, and relates to the technical field of air conditioners, wherein the compressor preheating control method comprises the following steps: when the compressor is stopped, judging whether the compressor meets a preset low-temperature stop condition; if so, controlling the compressor driving module to electrify a motor winding of the compressor; acquiring the module temperature of a compressor driving module, and controlling a windshield of an external fan based on the module temperature so as to enable the module temperature to be less than a preset protection temperature; the radiator of the compressor driving module is positioned on an air duct of the outdoor fan. The invention can promote the motor to generate heat to raise the temperature of an oil pool in the compressor, avoid the liquid refrigerant deposition in the compressor, improve the reliability of restarting the compressor, save the cost of the whole machine without additionally arranging a crankshaft heating belt, ensure that the temperature of a compressor driving module is in a normal range, and improve the reliability of preheating control of the compressor.)

1. A compressor warm-up control method, comprising:

when the compressor is stopped, judging whether the compressor meets a preset low-temperature stop condition or not;

if so, controlling a compressor driving module to electrify a motor winding of the compressor;

acquiring the module temperature of the compressor driving module, and controlling a windshield of an outer fan based on the module temperature so as to enable the module temperature to be lower than a preset protection temperature; and the radiator of the compressor driving module is positioned on the air duct of the outdoor fan.

2. The compressor warm-up control method as claimed in claim 1, wherein the step of obtaining a module temperature of the compressor driving module and controlling a damper of the outer fan based on the module temperature includes:

detecting the module temperature of the compressor driving module in real time;

when the temperature of the module is greater than or equal to a first temperature threshold and less than a second temperature threshold, controlling the outer fan to start to operate by a first preset windshield;

and when the module temperature is greater than or equal to the second temperature threshold and smaller than a third temperature threshold, controlling the outer fan to increase a second preset windshield.

3. The compressor warm-up control method as claimed in claim 2, wherein the step of controlling the outer fan to increase the second preset damper includes:

and controlling the outer fan to increase a third preset windshield every first preset time interval until the outer fan reaches the maximum windshield.

4. The compressor warm-up control method as set forth in claim 2, further comprising:

and when the module temperature is greater than or equal to the third temperature threshold value, controlling the outer fan to run in a maximum windshield mode, and controlling the compressor driving module to stop running.

5. The compressor warm-up control method as set forth in claim 4, further comprising:

and when the module temperature is less than the first temperature threshold value, controlling the compressor driving module to start to operate at a first preset power.

6. The compressor warm-up control method as claimed in claim 1, wherein the step of judging whether the compressor satisfies a preset low temperature stop condition includes:

judging whether the shutdown time of the compressor reaches a preset shutdown time or not;

if yes, detecting the outdoor environment temperature and the exhaust temperature of the compressor;

and judging whether the compressor meets a preset low-temperature shutdown condition or not based on the outdoor environment temperature and the exhaust temperature.

7. The compressor warm-up control method as claimed in claim 6, wherein the step of determining whether the compressor satisfies a preset low temperature stop condition based on the outdoor ambient temperature and the discharge temperature includes:

and when the outdoor environment temperature is lower than a first preset temperature and the exhaust temperature is lower than a second preset temperature, determining that the compressor meets a preset low-temperature shutdown condition.

8. A compressor warm-up control apparatus, comprising:

the judging module is used for judging whether the compressor meets a preset low-temperature shutdown condition or not when the compressor is shut down;

the first control module is used for controlling the compressor driving module to electrify a motor winding of the compressor when the compressor meets a preset low-temperature shutdown condition;

the second control module is used for acquiring the module temperature of the compressor driving module and controlling the windshield of the outer fan based on the module temperature so as to enable the module temperature to be smaller than a preset protection temperature; and the radiator of the compressor driving module is positioned on the air duct of the outdoor fan.

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.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a compressor preheating control method and device and an air conditioner.

Background

When present air conditioner shut down in heating operation, if the compressor down time is longer, and outdoor ambient temperature is lower, lead to liquid refrigerant to produce the deposit in the oil sump of compressor easily, among the control technique is preheated to present compressor, increase the device that generates heat in the compressor usually and make the evaporation of liquid refrigerant, though promoted the start reliability, but increased air conditioning unit's cost, simultaneously, if the improper device temperature control that generates heat leads to the compressor to damage easily, the reliability that the control was preheated to the compressor is lower.

Disclosure of Invention

In order to solve the problems, the invention provides a compressor preheating control method, a compressor preheating control device and an air conditioner, which can promote a motor to generate heat to raise the temperature of an oil pool in a compressor, avoid liquid refrigerant deposition in the compressor, improve the reliability of restarting the compressor, save the whole machine cost, ensure that the temperature of a compressor driving module is within a normal range, and improve the reliability of compressor preheating control.

According to an embodiment of the present invention, in one aspect, there is provided a compressor warm-up control method, including: when the compressor is stopped, judging whether the compressor meets a preset low-temperature stop condition or not; if so, controlling a compressor driving module to electrify a motor winding of the compressor; acquiring the module temperature of the compressor driving module, and controlling a windshield of an outer fan based on the module temperature so as to enable the module temperature to be lower than a preset protection temperature; and the radiator of the compressor driving module is positioned on the air duct of the outdoor fan.

By adopting the technical scheme, the motor can be promoted to generate heat so as to raise the temperature of an oil pool in the compressor, liquid refrigerant deposition in the compressor is avoided, the reliability of restarting the compressor is improved, a heating device is not required to be additionally arranged in the control mode, and the cost of the whole compressor is saved; through controlling the windshield of the outer fan, the cooling effect can be achieved when the module temperature of the compressor driving module is higher, the temperature of the compressor driving module is ensured to be within a normal range, and the reliability of preheating control of the compressor is improved.

Preferably, the step of obtaining a module temperature of the compressor driving module and controlling a damper of the outer fan based on the module temperature includes: detecting the module temperature of the compressor driving module in real time; when the temperature of the module is greater than or equal to a first temperature threshold and less than a second temperature threshold, controlling the outer fan to start to operate by a first preset windshield; and when the module temperature is greater than or equal to the second temperature threshold and smaller than a third temperature threshold, controlling the outer fan to increase a second preset windshield.

Through adopting above-mentioned technical scheme, real-time detection compressor drive module's module temperature to set up outer fan windscreen according to the temperature interval that module temperature is located, can be when module temperature is higher, the radiating rate to compressor drive module with higher speed automatically reduces module temperature, guarantees that module temperature is in normal temperature within range, prevents that the module from burning out, has ensured the security of compressor drive module operation.

Preferably, the step of controlling the outer fan to increase the second preset damper includes: and controlling the outer fan to increase a third preset windshield every first preset time interval until the outer fan reaches the maximum windshield.

By adopting the technical scheme, the windshield of the outer fan is controlled to be periodically increased, the heat dissipation speed of the driving module can be accelerated, and the overhigh temperature of the module is prevented.

Preferably, the compressor warm-up control method further includes: and when the module temperature is greater than or equal to the third temperature threshold value, controlling the outer fan to run in a maximum windshield mode, and controlling the compressor driving module to stop running.

By adopting the technical scheme, the heat dissipation speed of the compressor driving module is accelerated, and the compressor driving module is closed, so that the further rise of the module temperature is avoided, the module temperature is rapidly reduced, and the running stability of the compressor driving module is ensured.

Preferably, the compressor warm-up control method further includes: and when the module temperature is less than the first temperature threshold value, controlling the compressor driving module to start to operate at a first preset power.

Through adopting above-mentioned technical scheme, detect the module temperature once more to control compressor drive module restart when the module temperature is lower, avoided appearing liquid refrigerant deposit once more in the oil bath of compressor, promoted the reliability that the compressor started.

Preferably, the step of determining whether the compressor meets a preset low-temperature shutdown condition includes: judging whether the shutdown time of the compressor reaches a preset shutdown time or not; if yes, detecting the outdoor environment temperature and the exhaust temperature of the compressor; and judging whether the compressor meets a preset low-temperature shutdown condition or not based on the outdoor environment temperature and the exhaust temperature.

By adopting the technical scheme, when the compressor is stopped for a long time, whether the compressor meets the preset low-temperature stop condition or not is judged based on the outdoor environment temperature of the compressor and the exhaust temperature of the compressor, whether the condition that liquid refrigerants are deposited in the oil pool or not can be accurately judged, and whether the compressor needs to be preheated or not can be accurately judged.

Preferably, the step of determining whether the compressor satisfies a preset low-temperature shutdown condition based on the outdoor ambient temperature and the discharge temperature includes: and when the outdoor environment temperature is lower than a first preset temperature and the exhaust temperature is lower than a second preset temperature, determining that the compressor meets a preset low-temperature shutdown condition.

By adopting the technical scheme, the outdoor environment temperature threshold and the exhaust temperature threshold are set, whether the oil pool in the compressor needs to be heated or not can be accurately judged, the condition that the energy consumption of the air conditioner is high due to the fact that the air conditioner is heated in advance is avoided, and the energy saving performance of the air conditioner is improved.

According to an embodiment of the present invention, in another aspect, there is provided a compressor warm-up control apparatus including: the judging module is used for judging whether the compressor meets a preset low-temperature shutdown condition or not when the compressor is shut down; the first control module is used for controlling the compressor driving module to electrify a motor winding of the compressor when the compressor meets a preset low-temperature shutdown condition; the second control module is used for acquiring the module temperature of the compressor driving module and controlling the windshield of the outer fan based on the module temperature so as to enable the module temperature to be smaller than a preset protection temperature; and the radiator of the compressor driving module is positioned on the air duct of the outdoor fan.

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 air conditioner is stopped at a low temperature, the motor winding of the compressor is electrified based on the compressor driving module, so that the motor can be promoted to generate heat to raise the temperature of an oil pool in the compressor, liquid refrigerant deposition in the compressor is avoided, the reliability of restarting the compressor is improved, a heating device is not required to be additionally arranged in the control mode, and the cost of the whole machine is saved; through controlling the windshield of the outer fan, the cooling effect can be achieved when the module temperature of the compressor driving module is higher, the temperature of the compressor driving module is ensured to be within a normal range, and the reliability of preheating control of the compressor 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 schematic structural diagram of a compressor driving module according to the present invention;

FIG. 3 is a flow chart of a compressor warm-up control method according to the present invention;

FIG. 4 is a control logic diagram for compressor drive module protection according to the present invention;

fig. 5 is a schematic structural diagram of a preheating control device of a compressor according to the present invention.

Description of reference numerals:

1-a compressor; 2-a first temperature sensor; 3-high pressure switch; 4-an oil separator; 5-a high pressure sensor; 6-four-way valve; 7-a filter; 8-gas side stop valve; 9-liquid side stop valve; 10-electronic expansion valve; 11-a second temperature sensor; 12-an outdoor heat exchanger; 13-an external fan; 14-a dispenser; 15-a third temperature sensor; 16-a gas-liquid separator; 17-a fourth temperature sensor; 18-an oil return capillary; 21-a drive module; 22-a heat sink; 23-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 embodiment provides an air conditioner, referring to the schematic structural diagram of the air conditioner shown in fig. 1, the air conditioner includes: the system comprises a compressor 1, a first temperature sensor 2, a high-pressure switch 3, an oil separator 4, a high-pressure sensor 5, a four-way valve 6, a filter 7, a gas-side stop valve 8, a liquid-side stop valve 9, an electronic expansion valve 10, a second temperature sensor 11, an outdoor heat exchanger 12, an external fan 13, a distributor 14, a third temperature sensor 15, a gas-liquid separator 16, a fourth temperature sensor 17 and an oil return capillary tube 18. The first temperature sensor 2 is used for collecting the discharge temperature of the compressor, the second temperature sensor 11 is used for detecting the outdoor environment temperature, and the fourth temperature sensor 17 is used for detecting the suction temperature of the compressor.

The outdoor unit of the air conditioner is provided with a compressor driving module, a radiator of the compressor driving module is located on an air duct of the external fan, see the schematic structural diagram of the compressor driving module shown in fig. 2, and the compressor driving module includes a driving module 21, a radiator 22 and a fifth temperature sensor 23, that is, when the external fan operates, the wind blows on the radiator of the compressor driving module, so that the driving module 21 is cooled down quickly. The fifth temperature sensor 23 is used to detect the module temperature of the compressor driving module.

The present embodiment provides a method for controlling preheating of a compressor, which can be applied to the air conditioner provided in the above embodiments, referring to a flowchart of the method for controlling preheating of a compressor shown in fig. 3, the method mainly includes the following steps S302 to S306:

step S302: and when the compressor is stopped, judging whether the compressor meets a preset low-temperature stop condition.

When the air conditioner runs in a heating mode and stops, if the outdoor environment temperature is low, liquid refrigerant deposition is easy to generate in the compressor, therefore, when the compressor stops running, whether the compressor meets the preset low-temperature stop condition or not is judged in real time, and when the liquid refrigerant deposition is generated in the compressor oil pool, the compressor is determined to meet the preset low-temperature stop condition.

Step S304: and if so, controlling the compressor driving module to electrify the motor winding of the compressor.

The compressor driving module is in communication connection with the compressor, when the compressor meets a preset low-temperature shutdown condition, the compressor driving module is controlled to start and operate with first preset power Pw1, so that the compressor driving module is electrified for a motor winding of the compressor, and the motor winding of the compressor generates heat after being electrified, so that the oil temperature in the compressor is improved, liquid refrigerant is evaporated, and the phenomenon that the liquid refrigerant is deposited to influence the restart of the compressor is avoided. And this compressor preheating mode need not to install heating device for the compressor additional, can be applied to compressor drive module and outer fan adjacent air conditioner in, and the suitability is stronger.

Step S306: and acquiring the module temperature of the compressor driving module, and controlling the windshield of the external fan based on the module temperature so as to enable the module temperature to be less than the preset protection temperature.

The radiator of the compressor driving module is located on an air channel of the outdoor fan, when the compressor driving module starts to electrify the motor winding, the module temperature of the compressor driving module is detected in real time, the outer fan windshield is controlled according to the change condition of the module temperature, the radiating speed of the compressor driving module is accelerated, the compressor driving module is guaranteed not to be burnt due to overhigh temperature, 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 compressor preheating control method provided by the embodiment, under the condition that the air conditioner is stopped at a low temperature, the motor winding of the compressor is electrified based on the compressor driving module, so that the motor can be promoted to generate heat to raise the temperature of an oil pool in the compressor, liquid refrigerant deposition in the compressor is avoided, the reliability of restarting the compressor is improved, a heating device is not required to be additionally arranged in the control mode, and the cost of the whole machine is saved; through controlling the windshield of the outer fan, the cooling effect can be achieved when the module temperature of the compressor driving module is higher, the temperature of the compressor driving module is ensured to be within a normal range, and the reliability of preheating control of the compressor is improved.

In order to ensure the safety of the operation of the compressor driving module, the embodiment provides an implementation manner of obtaining the module temperature of the compressor driving module and controlling the damper of the external fan based on the module temperature, and the implementation manner may specifically refer to the following steps (1) to (5):

step (1): and detecting the module temperature of the compressor driving module in real time.

When the compressor driving module starts to electrify the motor winding of the compressor, the compressor driving module can continuously generate heat, the heat of the driving module is transferred to the atmosphere through the radiator, the air conditioner complete machine is not started in the preheating process of the compressor, the heat transferred by the radiator through natural convection is limited, and when the gathered heat reaches a certain degree, the gathered heat is not timely dissipated, so that the compressor driving module can be damaged due to overheating.

In order to avoid the compressor driving module from being burnt due to overhigh temperature, the current temperature of the compressor driving module is detected in real time and recorded as the module temperature based on a temperature sensor arranged on the compressor driving module.

Step (2): and when the temperature of the module is greater than or equal to the first temperature threshold and less than the second temperature threshold, controlling the outer fan to start and operate by a first preset windshield.

When the module temperature Tf is less than the first temperature threshold Tf1, that is, when Tf is less than Tf1, it indicates that the heat generated by the compressor driving module is less, and the temperature of the compressor driving module can be reduced by natural convection of the heat sink without controlling the opening of the external fan.

When the module temperature Tf is greater than or equal to the first temperature threshold Tf1 and less than the second temperature threshold Tf2, that is, when Tf1 is greater than or equal to Tf < Tf2, it indicates that the heat generated by the compressor driving module is more, and in order to quickly dissipate the heat of the compressor driving module, the external fan is controlled to operate with a first preset damper P0. The first preset damper may be a minimum damper of the outer blower, such as when the outer blower damper includes a low damper, a medium damper, and a high damper, the first preset damper may be a low damper.

And (3): and when the temperature of the module is greater than or equal to the second temperature threshold and less than a third temperature threshold, controlling the outer fan to increase a second preset windshield.

When the 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 large, and in order to accelerate the heat dissipation of the compressor driving module and reduce the module temperature, the damper of the outer fan is controlled to increase a second preset damper, which may be one damper or two dampers, such as one damper or two dampers on the basis of a low damper, so that the outer fan operates at a medium damper or a high damper.

Through the module temperature of real-time detection compressor drive module to set up outer fan windshield according to the temperature interval that module temperature was located, can be when module temperature is higher, the radiating rate to compressor drive module with higher speed automatically reduces the module temperature, guarantees that the module temperature is in normal temperature within range, prevents that the module from burning out, has ensured the security of compressor drive module operation.

In a possible implementation manner, when the temperature of the module is greater than or equal to the second temperature threshold and less than the third temperature threshold, the outer fan may be further controlled to increase the third preset damper every first preset time interval until the outer fan reaches the maximum damper, and the outer fan is controlled to operate at the maximum gear. The value range of the first preset duration can be 1-5 min, the third preset windshield can be a windshield, and when the temperature of the module is higher, the heat dissipation speed of the driving module can be accelerated by controlling the periodic increase of the windshield of the outer fan, so that the overhigh temperature of the module is prevented.

And (4): and when the temperature of the module is greater than or equal to the third temperature threshold value, controlling the outer fan to run in a maximum windshield mode, and controlling the compressor driving module to stop running.

When the module temperature Tf is greater than or equal to the third temperature threshold Tf3, namely when Tf3 is not greater than Tf, the compressor driving module is turned off by controlling the outer fan to run with the largest windshield, and the motor winding of the compressor is stopped to be electrified, so that the heat dissipation speed of the compressor driving module is accelerated.

And (5): and when the module temperature is less than a first temperature threshold value, controlling the compressor driving module to start to operate at a first preset power.

When the module temperature is greater than or equal to the third temperature threshold value and the compressor driving module is closed, the module temperature of the compressor driving module is continuously detected in real time, when the module temperature is detected to be less than the first temperature threshold value, namely when Tf is less than Tf1, the module temperature of the compressor driving module is indicated to be effectively controlled, in order to avoid liquid refrigerant deposition in an oil pool of the compressor, the compressor driving module is controlled to be started and operated again at the first preset power Pw1, and the reliability of the starting of the compressor is improved. Wherein, Tf1 is more than or equal to 60 ℃ and more than Tf2 and more than Tf3 and less than 85 ℃, Pw1 is more than or equal to 10w and less than 200w, Pmin is more than or equal to P0 and more than Pmax (Pmin is the minimum windshield of the outer fan, Pmax is the maximum windshield of the outer fan).

In order to accurately determine whether the compressor needs to be preheated, the present embodiment provides an implementation manner for determining whether the compressor meets the preset low-temperature shutdown condition, and the following steps 1) to 3) may be specifically referred to:

step 1): and judging whether the shutdown time of the compressor reaches the preset shutdown time or not.

After the air conditioner is shut down in heating operation, the shutdown time of the compressor is recorded based on the timer, the timer is reset before each time is counted, and liquid refrigerant deposition is easy to occur when the shutdown time of the compressor is long, so that whether the shutdown time of the compressor is greater than or equal to the preset shutdown time is judged at first, the preset shutdown time can be determined according to the time in which the refrigerant deposition actually occurs in the compressor, for example, the value range of the preset shutdown time can be 1-3 hours, and the optimal value is 2 hours.

Step 2): if yes, the outdoor environment temperature and the exhaust temperature of the compressor are detected.

When the shutdown time of the compressor is longer than or equal to the preset shutdown time, the risk of liquid refrigerant deposition in the compressor is high, the exhaust temperature of the compressor is detected in real time based on a temperature sensor arranged on an exhaust pipe of the compressor, and the outdoor environment temperature of the environment where the compressor is located is detected in real time based on a temperature sensor arranged on an outdoor unit.

Step 3): and judging whether the compressor meets a preset low-temperature shutdown condition or not based on 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. Whether the compressor meets the preset low-temperature shutdown condition or not is judged based on the outdoor environment temperature of the compressor and the exhaust temperature of the compressor when the shutdown time of the compressor is long, whether the compressor is deposited in the oil tank or not can be accurately judged, and therefore whether the compressor needs to be preheated or not can be accurately judged.

In one possible embodiment, when the outdoor ambient temperature is less than a first preset temperature and the discharge temperature is less than a second preset temperature, it is determined that the compressor satisfies a 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 ℃. Through setting up outdoor ambient temperature threshold value and exhaust temperature threshold value, can accurately judge whether need heat the oil bath in the compressor, avoid heating in advance to lead to the air conditioner energy consumption higher, promote the energy-conservation nature of air conditioner.

According to the compressor preheating control method provided by the embodiment, the compressor is preheated by the compressor driving module, the starting reliability of the compressor is ensured, the module temperature is reduced by starting the external fan to perform forced convection when the module temperature is higher, the module temperature is prevented from being too high, and the running stability of the compressor driving module is ensured.

Corresponding to the compressor preheating 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 above compressor preheating control method, referring to a control logic diagram of protection of the compressor driving module shown in fig. 4, and the following steps S401 to S408 may be specifically referred to for execution:

step S401: 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 S402: the compressor drive module is controlled to start operation at Pw1 to preheat the compressor.

After the air conditioner is heated and 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. Such as when the air conditioner simultaneously satisfies: when the external environment temperature Ta is less than 5 ℃, the exhaust temperature Td is less than 10 ℃ and the shutdown time is more than 2h, the compressor driving module is controlled to electrify the winding coil of the compressor, so that the reliability of the compressor when the compressor is restarted is ensured.

Step S403: and controlling the compressor driving module to stop and close.

Step S404: when the compressor driving module is started, the module temperature Tf of the compressor driving module is detected in real time.

Step S405: and when Tf1 is more than or equal to Tf < Tf2, controlling the outer fan to operate at a first preset damper P0.

Step S406: and when Tf2 is more than or equal to Tf < Tf3, controlling the outer fan to increase 1 windshield every first preset time interval until the outer fan reaches the maximum windshield.

And controlling the outer fan to increase one windshield every a first preset time period t2 on the basis of the first preset windshield.

Step S407: and when the Tf3 is not more than Tf, controlling the outer fan to run at the maximum windshield, and controlling the driving module of the compressor to stop electrifying the motor winding of the compressor.

Step S408: when Tf < Tf1 is detected, the compressor driving module is driven to be opened again at Pw1 power.

Corresponding to the method for controlling preheating of the compressor provided in the above embodiment, an embodiment of the present invention provides a preheating control device for a compressor, which can be applied to an air conditioner, and referring to a schematic structural diagram of the preheating control device for a compressor as shown in fig. 5, the preheating control device includes the following modules:

and the judging module 51 is used for judging whether the compressor meets the preset low-temperature stop condition or not when the compressor is stopped.

And the first control module 52 is used for controlling the compressor driving module to electrify the motor winding of the compressor when the compressor meets the preset low-temperature stop condition.

The second control module 53 is configured to obtain a module temperature of the compressor driving module, and control a damper of the external fan based on the module temperature, so that the module temperature is lower than a preset protection temperature; the radiator of the compressor driving module is positioned on an air duct of the outdoor fan.

According to the compressor preheating control device provided by the embodiment, under the condition that the air conditioner is stopped at a low temperature, the motor winding of the compressor is electrified based on the compressor driving module, so that the motor can be promoted to generate heat to raise the temperature of an oil pool in the compressor, liquid refrigerant deposition in the compressor is avoided, the reliability of restarting the compressor is improved, a heating device is not required to be additionally arranged in the control mode, and the cost of the whole machine is saved; through controlling the windshield of the outer fan, the cooling effect can be achieved when the module temperature of the compressor driving module is higher, the temperature of the compressor driving module is ensured to be within a normal range, and the reliability of preheating control of the compressor is improved.

In an embodiment, the second control module 53 is further configured to detect a module temperature of the compressor driving module in real time; when the temperature of the module is greater than or equal to a first temperature threshold and less than a second temperature threshold, controlling the outer fan to start to operate by a first preset windshield; and when the temperature of the module is greater than or equal to the second temperature threshold and less than a third temperature threshold, controlling the outer fan to increase a second preset windshield.

In one embodiment, the second control module 53 is further configured to control the outer fan to increase the third preset damper every first preset time interval until the outer fan reaches the maximum damper.

In an embodiment, the second control module 53 is further configured to control the external air blower to operate at the maximum windshield and control the compressor driving module to stop operating when the module temperature is greater than or equal to the third temperature threshold.

In an embodiment, the second control module 53 is further configured to detect a module temperature of the compressor driving module in real time after the compressor driving module stops operating, and control the compressor driving module to start operating at a first preset power when the module temperature is less than a first temperature threshold.

In an embodiment, the judging module 51 is further configured to judge whether the shutdown time period of the compressor reaches a preset shutdown time period; if yes, detecting the outdoor environment temperature and the exhaust temperature of the compressor; and judging whether the compressor meets a preset low-temperature shutdown condition or not based on the outdoor environment temperature and the exhaust temperature.

In an embodiment, the determining module 51 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 and the discharge temperature is less than a second preset temperature.

The above-mentioned compressor that this embodiment provided preheats controlling means preheats the compressor through adopting compressor drive module, has guaranteed the reliability that the compressor starts, and through when the module temperature is higher, opens outer fan and forces the convection current to reduce the module temperature, prevents that the module temperature is too high, has guaranteed the stability of compressor drive module operation.

Corresponding to the compressor warm-up control method provided by the above embodiment, the present embodiment provides an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the compressor warm-up control method provided by the above embodiment is implemented.

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 compressor preheating 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 compressor preheating control device and the air conditioner disclosed by the embodiment correspond to the compressor preheating 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.