CN109774420B - Electric auxiliary heat control method and system for air conditioner of electric automobile and storage medium - Google Patents
Electric auxiliary heat control method and system for air conditioner of electric automobile and storage medium Download PDFInfo
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- CN109774420B CN109774420B CN201811559568.1A CN201811559568A CN109774420B CN 109774420 B CN109774420 B CN 109774420B CN 201811559568 A CN201811559568 A CN 201811559568A CN 109774420 B CN109774420 B CN 109774420B
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Abstract
The invention relates to an electric auxiliary heat control method and system for an electric automobile air conditioner and a storage medium. The control method comprises the following steps: if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner; when the outer ring temperature and the inner ring temperature meet a first preset condition, obtaining a compressor state parameter of the air conditioner, and when the compressor state parameter meets a second preset condition, starting the electric auxiliary heating of the air conditioner. According to the embodiment of the invention, when the air conditioner is in heating work, the outer ring temperature and the inner ring temperature of the air conditioner are acquired, when the outer ring temperature and the outer ring temperature meet preset conditions, whether the state parameters of the compressor of the air conditioner also meet the preset conditions is judged, when the state parameters of the compressor of the air conditioner also meet the preset conditions, the electric auxiliary heating of the air conditioner is started, the next judgment is carried out after the previous condition is met, the accurate control on and off of the electric heating of the air conditioner is realized, and the consumption of electric energy is reduced to the greatest extent.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to an electric auxiliary heat control method and system for an electric automobile air conditioner and a storage medium.
Background
The electric auxiliary heating refers to the PTC electric auxiliary heating technology of the air conditioner. Theoretically, the heating quantity is increased by using additional electric heating, and the effect is obvious. PTC is a semiconductor heating ceramic, and when the external temperature is lowered, the resistance value of PTC is reduced, and the heating value is increased accordingly. According to the principle, the air conditioner adopting the PTC electric auxiliary heating technology can automatically change the heating quantity according to the change of the room temperature and the air quantity of the indoor unit, thereby properly adjusting the room temperature and achieving the purpose of quickly and powerfully heating.
Generally, the normal performance of the cooling and heating functions of the air conditioner is seriously influenced by cold weather, and the air conditioner with the electric auxiliary heating function well overcomes the defect due to the adjusting and assisting functions of the electric auxiliary heating on the heat productivity of the air conditioner, and is very suitable for being used in severe cold areas. However, the electric auxiliary heat control of the existing electric bus air conditioner usually controls whether the electric auxiliary heat is started according to the ambient temperature, the temperature of the outdoor environment cannot be easily changed, the electric auxiliary heat of the air conditioner is started for a long time, so that the electric quantity consumption speed of the automobile is too high, and meanwhile, each part in the automobile can bear larger burden.
Disclosure of Invention
In order to solve the problems in the prior art, at least one embodiment of the invention provides an electric auxiliary heat control method and system for an air conditioner of an electric vehicle and a storage medium.
The embodiment of the invention provides an electric auxiliary heat control method for an air conditioner of an electric automobile, which comprises the following steps:
if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner, and judging whether the outer ring temperature and the inner ring temperature meet a first preset condition or not;
when the outer ring temperature and the inner ring temperature meet a first preset condition, acquiring a compressor state parameter of the air conditioner, and judging whether the compressor state parameter meets a second preset condition;
and when the state parameter of the compressor meets a second preset condition, starting the electric auxiliary heating of the air conditioner.
Based on the above technical solutions, the embodiments of the present invention may be further improved as follows.
With reference to the first aspect, in a first embodiment of the first aspect, the obtaining the outer ring temperature and the inner ring temperature of the air conditioner, and determining whether the outer ring temperature and the inner ring temperature satisfy a first preset condition includes:
acquiring the outer ring temperature and the inner ring temperature of the air conditioner;
judging whether the outer ring temperature is less than or equal to a first preset threshold value or not, and whether the inner ring temperature is less than or equal to a second preset threshold value or not;
if so, the temperature of the outer ring and the temperature of the inner ring meet a first preset condition, and if not, the electric auxiliary heat of the air conditioner is turned off.
With reference to the first embodiment of the first aspect, in a second embodiment of the first aspect, the second preset threshold is a set temperature of the air conditioner; the first preset threshold is-5-0 ℃.
With reference to the first aspect, in a third embodiment of the first aspect, the obtaining a compressor state parameter of the air conditioner, and determining whether the compressor state parameter meets a second preset condition includes:
acquiring the pressure saturation temperature of a compressor of the air conditioner and the starting time of the compressor;
judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period or not, and judging whether the starting time period of the compressor is larger than or equal to a fourth preset threshold value or not;
if so, the compressor state parameter meets a second preset condition; if not, the electric auxiliary heat of the air conditioner is turned off.
With reference to the first aspect, in a fourth embodiment of the first aspect, the obtaining a compressor state parameter of the air conditioner, and determining whether the compressor state parameter meets a second preset condition includes:
acquiring the pressure saturation temperature of a compressor of the air conditioner, and judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period;
when the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period, obtaining the starting time period of the compressor of the air conditioner, and judging whether the starting time period of the compressor is larger than or equal to a fourth preset threshold value or not;
when the starting time of the compressor is greater than or equal to a fourth preset threshold, the state parameter of the compressor meets a second preset condition; when the starting time of the compressor is less than a fourth preset threshold value, the electric auxiliary heat of the air conditioner is turned off;
and when the pressure saturation temperature of the compressor is not continuously smaller than a third preset threshold value within a first preset time, closing the electric auxiliary heat of the air conditioner.
With reference to the first aspect, in a fifth embodiment of the first aspect, before the obtaining a compressor state parameter of the air conditioner and determining whether the compressor state parameter meets a second preset condition, the control method further includes:
acquiring a fan wind shield of the air conditioner, and judging whether the fan wind shield is greater than a fifth preset threshold value within a second preset time period;
when the fan wind shield is larger than a fifth preset threshold value within a second preset time, acquiring a compressor state parameter of the air conditioner, and judging whether the compressor state parameter meets a second preset condition;
and when the wind gear of the fan is not greater than a fifth preset threshold value within a second preset time, closing the electric auxiliary heating of the air conditioner.
With reference to the first aspect or any one of the first, second, third, fourth or fifth embodiments of the first aspect, in a sixth embodiment of the first aspect, before the starting of the electric auxiliary heating of the air conditioner, the control method further includes:
detecting parameters of a heat protector for electric auxiliary heating;
judging whether the thermal protector is abnormal or not according to the thermal protector parameters;
and when the thermal protector is normal, starting the electric auxiliary heating of the air conditioner.
In a second aspect, an embodiment of the present invention provides an electric auxiliary heat control system for an air conditioner of an electric vehicle, where the electric auxiliary heat control system includes a processor, a memory; the processor is configured to execute the electrical auxiliary heat control program stored in the memory to implement the electrical auxiliary heat control method according to any one of the embodiments of the first aspect.
In a third aspect, embodiments of the present invention provide a computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the electrically-assisted thermal control method according to any one of the embodiments of the first aspect.
Compared with the prior art, the technical scheme of the invention has the following advantages: according to the embodiment of the invention, when the air conditioner is in heating work, the outer ring temperature and the inner ring temperature of the air conditioner are acquired, when the outer ring temperature and the outer ring temperature meet preset conditions, whether the state parameters of the compressor of the air conditioner also meet the preset conditions is judged, when the state parameters of the compressor of the air conditioner also meet the preset conditions, the electric auxiliary heating of the air conditioner is started, the next judgment is carried out after the previous condition is met, the accurate control on and off of the electric heating of the air conditioner is realized, and the consumption of electric energy is reduced to the greatest extent.
Drawings
Fig. 1 is a schematic flow chart of an electric auxiliary heat control method for an air conditioner of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an electric auxiliary heat control method for an air conditioner of an electric vehicle according to another embodiment of the present invention;
FIG. 3 is a schematic flow chart of an electric auxiliary heat control method for an air conditioner of an electric vehicle according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electric auxiliary heat control system of an air conditioner of an electric vehicle according to still another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, in an embodiment of the present invention, a method for controlling an electric auxiliary heat of an air conditioner of an electric vehicle includes:
and S11, if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner, and judging whether the outer ring temperature and the inner ring temperature meet a first preset condition.
In the embodiment, the air conditioner of the electric automobile is confirmed to be in a heating state, the temperature of the outer ring and the temperature of the inner ring of the air conditioner are obtained, when judging whether to start the electric auxiliary heat according to the outer ring temperature and the inner ring temperature, when the outer ring temperature or the inner ring temperature is greater than respective preset threshold value, the working load of the air conditioner at the moment is proved to be the maximum value, the electric auxiliary heat is not needed to assist the heating work of the air conditioner at the moment, when the outer ring temperature and the inner ring temperature of the air conditioner are both smaller than respective preset threshold values, the working load of the electric automobile does not reach the upper limit value, and the temperature of the environment of the air conditioner does not reach the expected state, at this moment, the electric auxiliary heating of the air conditioner can be turned on to carry out heating assistance, in the embodiment, namely, whether the outer ring temperature is less than or equal to a first preset threshold value or not and whether the inner ring temperature is less than or equal to a second preset threshold value or not are judged, and at the moment, the electric auxiliary heating can be selected to be started to assist the heating work of the air conditioner.
In this embodiment, the temperature threshold of the outer loop temperature may be set, that is, the first preset threshold is T1, T1 may be set to-5 to 0 ℃, specifically, 0 ℃, or-5 ℃ or 5 facilities, since the electric auxiliary heat of the air conditioner is preferably used when the temperature difference between the indoor temperature and the set temperature is the largest, and the air conditioning heating is generally performed in a cold environment, the first preset threshold of the outer loop temperature is set to be about 0 ℃, the environmental temperature may be rapidly controlled, the temperature threshold T2 of the inner loop temperature may be set, that is, the second preset threshold is associated with the temperature set by the user, may be consistent with the temperature set by the user, or may be less than the temperature set by the user, so as to ensure that the electric auxiliary heat can be effectively started, specifically, the inner loop temperature and the outer loop temperature may be divided into three different intervals to control the on state of the electric auxiliary heat, for example, when the outer ring temperature is greater than T1+2 or the inner ring temperature is greater than T2, the electric auxiliary heat is controlled to be closed; when the outer ring temperature is greater than T1 and the outer ring temperature is less than T1+2, or the inner ring temperature is greater than T2-2 and the inner ring temperature is less than T2, controlling the electric auxiliary heat to be closed; and when the outer ring temperature is less than or equal to T1 and the inner ring temperature is less than or equal to T2-2, controlling the electric auxiliary heater to be started.
And S12, when the outer ring temperature and the inner ring temperature meet the first preset condition, acquiring the compressor state parameter of the air conditioner, and judging whether the compressor state parameter meets the second preset condition.
In this embodiment, when the outer ring temperature and the inner ring temperature satisfy a first preset condition, that is, the temperature conditions of the outer ring temperature and the inner ring temperature satisfy the condition of turning on the electric auxiliary heat, the state parameters of the compressor of the air conditioner are obtained, because the refrigeration and heating of the air conditioner depend on the working state of the compressor, for example, when the working time of the compressor is not enough, and the compressor does not reach a stable operation, because the electric auxiliary heat can only play a role of auxiliary heating, if the compressor cannot perform good heating, the role of turning on the electric auxiliary heat is not large, and for example, when the pressure parameter in the compressor is too high, it is indicated that the compressor has reached a ground step of efficient operation, at this time, the effect of turning on the electric auxiliary heat is not large, it is unnecessary to turn on the electric auxiliary heat to provide heat energy, and whether to turn on the electric auxiliary heat may be determined by referring to the condition of the.
In this embodiment, when the outer ring temperature and the inner ring temperature do not satisfy the first preset condition, the electric auxiliary heat of the air conditioner is turned off.
And S13, when the state parameter of the compressor meets a second preset condition, starting the electric auxiliary heating of the air conditioner.
In this embodiment, when the compressor state parameter meets the second preset condition, that is, the compressor state parameter meets the condition of turning on the electric auxiliary heater, the electric auxiliary heater of the air conditioner is started to perform the electric auxiliary heater.
In this embodiment, before the electric auxiliary heat of the air conditioner is started, the control method further includes:
detecting parameters of a heat protector for electric auxiliary heating; and judging whether the thermal protector is abnormal or not according to the thermal protector parameters.
In this embodiment, when the parameter of the air conditioner satisfies the above requirement, the thermal protector parameter of the thermal protector for electric auxiliary heating is obtained, and whether the thermal protector is abnormal or not is determined according to the thermal protector parameter.
When the thermal protector is normal, the electric auxiliary heating of the air conditioner is started, and when the thermal protector is abnormal, the electric auxiliary heating of the air conditioner is closed.
When the thermal protector is abnormal, the thermal protector cannot effectively protect the electric auxiliary heating device, so that the electric auxiliary heating of the air conditioner cannot be started at the moment.
In this embodiment, before obtaining a compressor state parameter of the air conditioner and determining whether the compressor state parameter meets a second preset condition, the control method further includes:
and acquiring a fan wind shield of the air conditioner, and judging whether the fan wind shield is greater than a fifth preset threshold value within a second preset time.
In this embodiment, acquire the fan wind shelves of air conditioner, different fan wind shelves can make the rate inconsistent of the outer ring temperature change of air conditioner, and the fan wind shelves are big more, the rate of outer ring temperature change is fast more, the heat exchange efficiency of outer ring temperature and interior ring temperature is just higher this moment, the temperature of the outer ring temperature and interior ring temperature this moment will be lower, otherwise the temperature of the outer ring temperature and interior ring temperature will be higher, so, when fan wind shelves are low excessively, need not open the electricity and assist hot temperature control, in this embodiment, judge whether fan wind shelves are greater than the fifth preset threshold value in the second preset duration.
And when the wind gear of the fan is greater than a fifth preset threshold value within a second preset time, acquiring the state parameter of the compressor of the air conditioner, and judging whether the state parameter of the compressor meets a second preset condition. And when the fan wind shield meets the preset condition, continuing to perform the steps S12-S13.
And when the wind gear of the fan is not greater than the fifth preset threshold value within the second preset time, the electric auxiliary heat of the air conditioner is turned off, and when the wind gear of the fan does not meet the preset condition, the electric auxiliary heat of the air conditioner is turned off.
As shown in fig. 2, in an embodiment of the present invention, a method for controlling an electric auxiliary heat of an air conditioner of an electric vehicle includes:
and S21, if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner, and judging whether the outer ring temperature and the inner ring temperature meet a first preset condition.
In the embodiment, the air conditioner of the electric automobile is confirmed to be in a heating state, the temperature of the outer ring and the temperature of the inner ring of the air conditioner are obtained, when judging whether to start the electric auxiliary heat according to the outer ring temperature and the inner ring temperature, when the outer ring temperature or the inner ring temperature is greater than respective preset threshold value, the working load of the air conditioner at the moment is proved to be the maximum value, the electric auxiliary heat is not needed to assist the heating work of the air conditioner at the moment, when the outer ring temperature and the inner ring temperature of the air conditioner are both smaller than respective preset threshold values, the working load of the electric automobile does not reach the upper limit value, and the temperature of the environment of the air conditioner does not reach the expected state, at this moment, the electric auxiliary heating of the air conditioner can be turned on to carry out heating assistance, in the embodiment, namely, whether the outer ring temperature is less than or equal to a first preset threshold value or not and whether the inner ring temperature is less than or equal to a second preset threshold value or not are judged, and at the moment, the electric auxiliary heating can be selected to be started to assist the heating work of the air conditioner.
In this embodiment, the temperature threshold of the outer loop temperature may be set, that is, the first preset threshold is T1, T1 may be set to-5 to 0 ℃, specifically, 0 ℃, or-5 ℃ or 5 facilities, since the electric auxiliary heat of the air conditioner is preferably used when the temperature difference between the indoor temperature and the set temperature is the largest, and the air conditioning heating is generally performed in a cold environment, the first preset threshold of the outer loop temperature is set to be about 0 ℃, the environmental temperature may be rapidly controlled, the temperature threshold T2 of the inner loop temperature may be set, that is, the second preset threshold is associated with the temperature set by the user, may be consistent with the temperature set by the user, or may be less than the temperature set by the user, so as to ensure that the electric auxiliary heat can be effectively started, specifically, the inner loop temperature and the outer loop temperature may be divided into three different intervals to control the on state of the electric auxiliary heat, for example, when the outer ring temperature is greater than T1+2 or the inner ring temperature is greater than T2, the electric auxiliary heat is controlled to be closed; when the outer ring temperature is greater than T1 and the outer ring temperature is less than T1+2, or the inner ring temperature is greater than T2-2 and the inner ring temperature is less than T2, controlling the electric auxiliary heat to be closed; and when the outer ring temperature is less than or equal to T1 and the inner ring temperature is less than or equal to T2-2, controlling the electric auxiliary heater to be started.
And S22, when the outer ring temperature and the inner ring temperature meet a first preset condition, acquiring the compressor pressure saturation temperature and the compressor starting time of the air conditioner.
In this embodiment, when the outer ring temperature and the inner ring temperature satisfy the first preset condition, that is, the temperature conditions of the outer ring temperature and the inner ring temperature satisfy the condition of turning on the electric auxiliary heat, the compressor pressure saturation temperature (saturation temperature) of the air conditioner and the compressor start-up time are obtained, where the saturation temperature (saturation temperature) is a temperature ts of the liquid and the vapor in a dynamic equilibrium state, that is, in the saturation state. In the saturated state, the temperatures of the liquid and vapor are equal. When the saturation temperature is constant, the saturation pressure is also constant; conversely, the saturation temperature is constant when the saturation pressure is constant. The pressure rises and a new dynamic equilibrium state is formed at a new temperature, and a certain saturation temperature of the substance must correspond to a certain saturation pressure. The saturated temperature of the compressor pressure is the saturated temperature of the compressor under a certain pressure, the saturated temperature can explain the pressure in the compressor from the side, namely the higher the saturated temperature is, the higher the pressure in the compressor is, when an air conditioner is started for heating, an outer compressor firstly operates and preheats for 3-5 minutes, then an indoor unit evaporator operates at 23 ℃ by breeze, when the evaporator operates at 38 ℃ by high-speed wind, and the compressor is preheated for about 5 minutes, so that the compressor is protected, and the compressor is prevented from being damaged by too cold due to immediate starting. Therefore, the compressor is started after a period of time after the air conditioner is powered on, and the obtained starting time of the compressor is used for determining whether the preheating time of the compressor of the air conditioner reaches the standard or not so as to avoid energy loss caused by direct starting of electric auxiliary heat when the air conditioner does not work normally.
S23, judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period or not, and judging whether the starting time period of the compressor is larger than or equal to a fourth preset threshold value or not.
In this step, the pressure saturation temperature of the compressor within a continuous first preset time period is obtained, and whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within the first preset time period or not is judged, and meanwhile, whether the compressor starting time period is larger than or equal to a fourth preset threshold value or not is judged.
If so, starting the electric auxiliary heating of the air conditioner; if not, the electric auxiliary heat of the air conditioner is turned off.
When the pressure saturation temperature of the compressor is smaller than the third preset threshold value and the starting time of the compressor is longer than or equal to the fourth preset threshold value, the working state of the compressor does not reach the upper limit and the preheating time of the compressor meets the requirement, at the moment, the electric auxiliary heat of the air conditioner is started for heat supply assistance, and the effects of normally controlling the electric heating, saving energy, improving the comfort of customers and the like can be achieved.
In this embodiment, before the electric auxiliary heat of the air conditioner is started, the control method further includes:
detecting parameters of a heat protector for electric auxiliary heating; and judging whether the thermal protector is abnormal or not according to the thermal protector parameters.
In this embodiment, when the parameter of the air conditioner satisfies the above requirement, the thermal protector parameter of the thermal protector for electric auxiliary heating is obtained, and whether the thermal protector is abnormal or not is determined according to the thermal protector parameter.
When the thermal protector is normal, the electric auxiliary heating of the air conditioner is started, and when the thermal protector is abnormal, the electric auxiliary heating of the air conditioner is closed.
When the thermal protector is abnormal, the thermal protector cannot effectively protect the electric auxiliary heating device, so that the electric auxiliary heating of the air conditioner cannot be started at the moment.
As shown in fig. 3, in an embodiment of the present invention, a method for controlling an electric auxiliary heat of an air conditioner of an electric vehicle includes:
and S31, if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner, and judging whether the outer ring temperature and the inner ring temperature meet a first preset condition.
In the embodiment, the air conditioner of the electric automobile is confirmed to be in a heating state, the temperature of the outer ring and the temperature of the inner ring of the air conditioner are obtained, when judging whether to start the electric auxiliary heat according to the outer ring temperature and the inner ring temperature, when the outer ring temperature or the inner ring temperature is greater than respective preset threshold value, the working load of the air conditioner at the moment is proved to be the maximum value, the electric auxiliary heat is not needed to assist the heating work of the air conditioner at the moment, when the outer ring temperature and the inner ring temperature of the air conditioner are both smaller than respective preset threshold values, the working load of the electric automobile does not reach the upper limit value, and the temperature of the environment of the air conditioner does not reach the expected state, at this moment, the electric auxiliary heating of the air conditioner can be turned on to carry out heating assistance, in the embodiment, namely, whether the outer ring temperature is less than or equal to a first preset threshold value or not and whether the inner ring temperature is less than or equal to a second preset threshold value or not are judged, and at the moment, the electric auxiliary heating can be selected to be started to assist the heating work of the air conditioner.
In this embodiment, the temperature threshold of the outer loop temperature may be set, that is, the first preset threshold is T1, T1 may be set to-5 to 0 ℃, specifically, 0 ℃, or-5 ℃ or 5 facilities, since the electric auxiliary heat of the air conditioner is preferably used when the temperature difference between the indoor temperature and the set temperature is the largest, and the air conditioning heating is generally performed in a cold environment, the first preset threshold of the outer loop temperature is set to be about 0 ℃, the environmental temperature may be rapidly controlled, the temperature threshold T2 of the inner loop temperature may be set, that is, the second preset threshold is associated with the temperature set by the user, may be consistent with the temperature set by the user, or may be less than the temperature set by the user, so as to ensure that the electric auxiliary heat can be effectively started, specifically, the inner loop temperature and the outer loop temperature may be divided into three different intervals to control the on state of the electric auxiliary heat, for example, when the outer ring temperature is greater than T1+2 or the inner ring temperature is greater than T2, the electric auxiliary heat is controlled to be closed; when the outer ring temperature is greater than T1 and the outer ring temperature is less than T1+2, or the inner ring temperature is greater than T2-2 and the inner ring temperature is less than T2, controlling the electric auxiliary heat to be closed; and when the outer ring temperature is less than or equal to T1 and the inner ring temperature is less than or equal to T2-2, controlling the electric auxiliary heater to be started.
S32, when the outer ring temperature and the inner ring temperature meet a first preset condition, acquiring the pressure saturation temperature of the compressor of the air conditioner, and judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time.
In this embodiment, when the outer ring temperature and the inner ring temperature satisfy the first preset condition, that is, the temperature conditions of the outer ring temperature and the inner ring temperature satisfy the condition of turning on the electric auxiliary heat, the compressor pressure saturation temperature (saturation temperature) of the air conditioner and the compressor start-up time are obtained, where the saturation temperature (saturation temperature) is a temperature ts of the liquid and the vapor in a dynamic equilibrium state, that is, in the saturation state. In the saturated state, the temperatures of the liquid and vapor are equal. When the saturation temperature is constant, the saturation pressure is also constant; conversely, the saturation temperature is constant when the saturation pressure is constant. The pressure rises and a new dynamic equilibrium state is formed at a new temperature, and a certain saturation temperature of the substance must correspond to a certain saturation pressure. The saturation temperature can be described from the side of the pressure in the compressor, that is, the higher the saturation temperature, the higher the pressure in the compressor, and the pressure in the compressor can be confirmed by judging the saturation temperature of the compressor pressure.
S33a, when the pressure saturation temperature of the compressor is continuously smaller than the third preset threshold value within the first preset time, obtaining the starting time of the compressor of the air conditioner, and judging whether the starting time of the compressor is larger than or equal to the fourth preset threshold value.
In this embodiment, when the pressure saturation temperature of the compressor is continuously less than the third preset threshold within the first preset time, the start time of the compressor is obtained, and whether the start time of the compressor is greater than the fourth preset threshold is judged, when the air conditioner is started for heating, the outer compressor is firstly operated and preheated for 3-5 minutes, then the evaporator of the indoor unit is operated by breeze when reaching 23 degrees, the evaporator is operated by high-speed wind when reaching 38 degrees, and the compressor is preheated for about 5 minutes, so as to protect the compressor and prevent the compressor from being damaged by too cold due to immediate start. Therefore, the compressor is started after a period of time after the air conditioner is powered on, and the obtained starting time of the compressor is used for determining whether the preheating time of the compressor of the air conditioner reaches the standard or not so as to avoid energy loss caused by direct starting of electric auxiliary heat when the air conditioner does not work normally.
When the starting time of the compressor is greater than or equal to a fourth preset threshold value, starting the electric auxiliary heating of the air conditioner; and when the starting time of the compressor is less than a fourth preset threshold value, the electric auxiliary heat of the air conditioner is turned off.
And when the starting time of the compressor is greater than or equal to a fourth preset threshold value, starting the electric auxiliary heating of the air conditioner, and otherwise, closing the electric auxiliary heating of the air conditioner.
And S33b, when the pressure saturation temperature of the compressor is not continuously less than the third preset threshold value within the first preset time, closing the electric auxiliary heat of the air conditioner.
When the pressure saturation temperature of the compressor is higher than a third preset threshold value, the pressure in the compressor is higher than a preset requirement, and at the moment, the electric auxiliary heat of the air conditioner needs to be turned off.
In this embodiment, before the electric auxiliary heat of the air conditioner is started, the control method further includes:
detecting parameters of a heat protector for electric auxiliary heating; and judging whether the thermal protector is abnormal or not according to the thermal protector parameters.
In this embodiment, when the parameter of the air conditioner satisfies the above requirement, the thermal protector parameter of the thermal protector for electric auxiliary heating is obtained, and whether the thermal protector is abnormal or not is determined according to the thermal protector parameter.
When the thermal protector is normal, the electric auxiliary heating of the air conditioner is started, and when the thermal protector is abnormal, the electric auxiliary heating of the air conditioner is closed.
When the thermal protector is abnormal, the thermal protector cannot effectively protect the electric auxiliary heating device, so that the electric auxiliary heating of the air conditioner cannot be started at the moment.
As shown in fig. 4, an embodiment of the present invention provides an electric auxiliary heat control system for an air conditioner of an electric vehicle, where the electric auxiliary heat control system includes a processor and a memory; the processor is used for executing the electric auxiliary heat control program stored in the memory to realize the electric auxiliary heat control method of any one of the above embodiments.
The storage medium for recording the program code of the software program that can realize the functions of the above-described embodiments is provided to the system or apparatus in the above-described embodiments, and the program code stored in the storage medium is read and executed by the computer (or CPU or MPU) of the system or apparatus.
In this case, the program code itself read out from the storage medium performs the functions of the above-described embodiments, and the storage medium storing the program code constitutes an embodiment of the present invention.
As a storage medium for supplying the program code, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, and the like can be used.
The functions of the above-described embodiments may be realized not only by executing the readout program code by the computer, but also by some or all of actual processing operations executed by an OS (operating system) running on the computer according to instructions of the program code.
Further, the embodiments of the present invention also include a case where after the program code read out from the storage medium is written into a function expansion card inserted into the computer or into a memory provided in a function expansion unit connected to the computer, a CPU or the like included in the function expansion card or the function expansion unit performs a part of or the whole of the processing in accordance with the command of the program code, thereby realizing the functions of the above-described embodiments.
Embodiments of the present invention provide a computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the method of electrically assisted thermal control of any of the above embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An electric auxiliary heat control method for an air conditioner of an electric automobile is characterized by comprising the following steps:
if the air conditioner is in heating work, acquiring the outer ring temperature and the inner ring temperature of the air conditioner, and judging whether the outer ring temperature and the inner ring temperature meet a first preset condition or not;
when the outer ring temperature and the inner ring temperature meet a first preset condition, acquiring a compressor state parameter of the air conditioner, and judging whether the compressor state parameter meets a second preset condition;
when the state parameter of the compressor meets a second preset condition, starting the electric auxiliary heat of the air conditioner;
the acquiring of the compressor state parameter of the air conditioner and the judging of whether the compressor state parameter meets a second preset condition comprise:
acquiring the pressure saturation temperature of a compressor of the air conditioner, and judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period;
when the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period, obtaining the starting time period of the compressor of the air conditioner, and judging whether the starting time period of the compressor is larger than or equal to a fourth preset threshold value or not;
when the starting time of the compressor is greater than or equal to a fourth preset threshold, the state parameter of the compressor meets a second preset condition; when the starting time of the compressor is less than a fourth preset threshold value, the electric auxiliary heat of the air conditioner is turned off;
and when the pressure saturation temperature of the compressor is not continuously smaller than a third preset threshold value within a first preset time, closing the electric auxiliary heat of the air conditioner.
2. The electric auxiliary heat control method for the air conditioner of the electric automobile as claimed in claim 1, wherein the obtaining of the outer ring temperature and the inner ring temperature of the air conditioner and the determining whether the outer ring temperature and the inner ring temperature satisfy a first preset condition comprise:
acquiring the outer ring temperature and the inner ring temperature of the air conditioner;
judging whether the outer ring temperature is less than or equal to a first preset threshold value or not, and whether the inner ring temperature is less than or equal to a second preset threshold value or not;
if so, the temperature of the outer ring and the temperature of the inner ring meet a first preset condition, and if not, the electric auxiliary heat of the air conditioner is turned off.
3. The electric vehicle air conditioner electric auxiliary heat control method according to claim 2, wherein the second preset threshold is a set temperature of the air conditioner; the first preset threshold is-5-0 ℃.
4. The electric auxiliary control method for the air conditioner of the electric automobile as claimed in claim 1, wherein the obtaining of the compressor state parameter of the air conditioner and the determining whether the compressor state parameter meets a second preset condition comprise:
acquiring the pressure saturation temperature of a compressor of the air conditioner and the starting time of the compressor;
judging whether the pressure saturation temperature of the compressor is continuously smaller than a third preset threshold value within a first preset time period or not, and judging whether the starting time period of the compressor is larger than or equal to a fourth preset threshold value or not;
if so, the compressor state parameter meets a second preset condition; if not, the electric auxiliary heat of the air conditioner is turned off.
5. The electric auxiliary control method for the air conditioner of the electric vehicle as claimed in claim 1, wherein before the obtaining of the compressor state parameter of the air conditioner and the determining whether the compressor state parameter meets the second preset condition, the control method further comprises:
acquiring a fan wind shield of the air conditioner, and judging whether the fan wind shield is greater than a fifth preset threshold value within a second preset time period;
when the fan wind shield is larger than a fifth preset threshold value within a second preset time, acquiring a compressor state parameter of the air conditioner, and judging whether the compressor state parameter meets a second preset condition;
and when the wind gear of the fan is not greater than a fifth preset threshold value within a second preset time, closing the electric auxiliary heating of the air conditioner.
6. The electric auxiliary heating control method for the air conditioner of the electric automobile as claimed in any one of claims 1 to 5, wherein before the starting of the electric auxiliary heating of the air conditioner, the control method further comprises:
detecting parameters of a heat protector for electric auxiliary heating;
judging whether the thermal protector is abnormal or not according to the thermal protector parameters;
and when the thermal protector is normal, starting the electric auxiliary heating of the air conditioner.
7. The electric auxiliary heat control system for the air conditioner of the electric automobile is characterized by comprising a processor and a memory; the processor is used for executing the electric auxiliary heat control program stored in the memory to realize the electric auxiliary heat control method of any one of claims 1-6.
8. A computer storable medium that stores one or more programs that are executable by one or more processors to implement the electrically assisted thermal control method of any one of claims 1 to 6.
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| CN201811559568.1A CN109774420B (en) | 2018-12-19 | 2018-12-19 | Electric auxiliary heat control method and system for air conditioner of electric automobile and storage medium |
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| CN201811559568.1A CN109774420B (en) | 2018-12-19 | 2018-12-19 | Electric auxiliary heat control method and system for air conditioner of electric automobile and storage medium |
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| CN109774420B true CN109774420B (en) | 2020-07-24 |
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| CN113531669B (en) * | 2021-07-12 | 2022-08-19 | 珠海格力电器股份有限公司 | Electric auxiliary heating module control method and device for air conditioner |
| CN114179592B (en) * | 2021-12-15 | 2023-04-21 | 东风汽车集团股份有限公司 | Heating control method, device and equipment for electric automobile and readable storage medium |
| WO2024239200A1 (en) * | 2023-05-22 | 2024-11-28 | 浙江吉利控股集团有限公司 | Heat exchange control method, readable storage medium, heat exchange control apparatus and heat exchange system |
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