CN112172455B - Temperature control method for heat pump air conditioner of electric automobile - Google Patents
Temperature control method for heat pump air conditioner of electric automobile Download PDFInfo
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- CN112172455B CN112172455B CN202011115935.6A CN202011115935A CN112172455B CN 112172455 B CN112172455 B CN 112172455B CN 202011115935 A CN202011115935 A CN 202011115935A CN 112172455 B CN112172455 B CN 112172455B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00807—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a specific way of measuring or calculating an air or coolant temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00892—Devices specially adapted for avoiding uncomfortable feeling, e.g. sudden temperature changes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Thermal Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the technical field of temperature control of electric vehicle heat pump air conditioners, discloses a temperature control method of an electric vehicle heat pump air conditioner, and solves the problem that in the traditional technology, the comfort experience of passengers is easily influenced by the control mode of an electric vehicle heat pump air conditioner in the cooling and heating modes. The scheme of the invention is summarized as follows: in a refrigeration mode, limiting the working rotating speed of the compressor according to the ambient temperature, adjusting the working rotating speed of the compressor according to the difference value between the actual temperature and the set temperature of the passenger compartment, and judging whether to adjust the working rotating speed of the compressor according to the difference value between the temperature of the air outlet of the air conditioner and the set temperature; in the heating mode, the difference between the current indoor temperature and the set temperature is considered, and whether the temperature of the air outlet reaches the standard is also considered, so that the working rotating speed of the compressor is adjusted and the rotating speed of the indoor blower is adjusted. The invention is suitable for controlling the heat pump air conditioner of the electric automobile in the refrigerating and heating modes.
Description
Technical Field
The invention relates to a control technology of an electric automobile air conditioner, in particular to a control method of the temperature of an electric automobile heat pump air conditioner.
Background
With the demands of environmental protection, energy conservation and consumption reduction, the development and the daily development of new energy automobiles are advanced, and the yield of the pure electric automobile industry is continuously increased in the day of steaming. Because an engine is not used as power and a heat source, the traditional automobile air conditioning system is not suitable for an electric vehicle, and therefore an electric compressor and a PTC heater are generally adopted to meet the use requirement. And the increase of PTC can affect the system structure, and the air conditioning box needs to be developed again, particularly on a hybrid vehicle, if the design of coexistence of PTC of the heater is needed, the heating channel is complex, and the flow resistance is large. In addition, the PTC heater has low heating efficiency, high power consumption and high surface temperature, belongs to a high-voltage component, and therefore has high requirements on the safety of an internal circuit of a cab, and finally causes cost rise.
Although the traditional method for controlling the temperature of the heat pump air conditioner of the electric automobile can maintain the stability of the indoor environment temperature, because the indoor air blower is at the same working speed under different environment temperatures and different temperatures of the passenger compartment, the working speed of the compressor does not consider the temperature of the air outlet, thus not only influencing the comfort of passengers but also having no energy-saving effect of the heat pump air conditioner, and mainly comprising the following steps: 1. in order to ensure that the actual temperature of the passenger compartment quickly reaches the target temperature set by passengers, the working rotating speed of the compressor is often very high, so that the temperature of an air outlet is too low, the integral temperature of the passenger compartment is not reduced, and the contradiction phenomenon that front-row passengers feel cold and rear-row passengers feel hot is caused; 2. in the heating mode, in order to prevent the front window from fogging and influencing the driving of a driver, an external circulation loop is generally adopted for air, so that if the working rotating speed of an indoor blower is too high, the temperature of an air outlet is too low, the actual temperature of a passenger compartment is difficult to reach or even cannot reach the set temperature of a passenger for a long time, and the comfort experience of the passenger is influenced; 3. the conventional method for controlling the temperature of the heat pump air conditioner of the electric automobile does not take the influence of the environmental temperature into consideration, and the aim of quickly enabling the temperature of a passenger compartment to reach the set temperature of passengers is usually pursued during working, so that the compressor reaches the rated maximum rotating speed under certain conditions, and the safety of the heat pump air conditioning system is influenced.
Disclosure of Invention
The invention provides a temperature control method for an electric vehicle heat pump air conditioner, which solves the problems that the comfort experience of a user is easily influenced and the energy is not saved in the control mode of the electric vehicle heat pump air conditioner in the refrigeration and heating modes in the traditional technology.
The technical scheme adopted for solving the technical problems is as follows:
a. analyzing the input target temperature to judge the working mode, if the input target temperature is in a cooling mode, entering the step b, and if the input target temperature is in a heating mode, entering the step c;
b. according to the current environment temperature of the electric automobile, limiting the working speed of the compressor: when the environment temperature is lower than 35 ℃, the rotating speed range of the compressor is Rmin to Rcmax1, when the environment temperature is between 35 ℃ and 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax2, when the environment temperature is higher than 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax3, and whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted in the current state is judged according to the absolute value of the difference value between the set temperature and the air outlet temperature of the air conditioner and the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment:
c. according to the environment temperature of the current electric automobile, limiting the working speed of the compressor: when the environment temperature is higher than-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax1, when the environment temperature is between-15 ℃ and-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax2, when the environment temperature is lower than-15 ℃, the rotating speed range of the compressor is Rmin to Rcmax3, and whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted in the current state is judged according to the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment.
The invention takes into account in particular the air conditioning outlet temperature. In order to prevent the air outlet temperature from being too high or too low due to the fact that the temperature of the passenger compartment reaches the temperature set by the user, the air outlet temperature of the air conditioner is limited by taking the temperature set by the user as a basis, so that the rotating speed of the compressor is controlled, the overshoot of the temperature is reduced, and the energy consumption is reduced.
Drawings
Fig. 1 is a flowchart of a control method of the present invention.
Detailed Description
The technical scheme of the invention is further described by combining the attached drawings and examples.
Note that the L1, the L2, the L3, the L4, the L5 and the L6 are the gear positions of the air conditioner blower, and the corresponding air volume is generally 135m 3 /h、175m 3 /h、215m 3 /h、255m 3 /h、295m 3 /h、345m 3 H; in fig. 1, "temperature difference 1" refers to an absolute value of a difference between a current set temperature and an air outlet temperature, i.e. | set temperature-air outlet temperature |; "temperature difference 2" in fig. 1 refers to the difference between the current actual temperature and the set temperature, i.e., | actual temperature-set temperature |.
As shown in fig. 1, the control method for the heat pump air conditioner of the electric vehicle in this embodiment is implemented by the following steps:
a. after the heat pump air conditioner of the electric automobile is started to run, the intention of a passenger is analyzed so as to judge the working mode, if the working mode is a cooling mode, the step b is carried out, and if the working mode is a heating mode, the step c is carried out.
b. The method comprises the steps of limiting the working rotating speed of a compressor according to the current environment temperature of the electric automobile, when the environment temperature is lower than 35 ℃, the rotating speed range of the compressor is Rmin to Rcmax1, when the environment temperature is 35 ℃ to 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax2, when the environment temperature is higher than 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax3, and judging whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted according to the following conditions. Rcmax1, rcmax2 and Rcmax3 represent the rotating speeds of three different gears of the compressor during refrigeration, and in the embodiment, the rotating speeds are 5000r/min,6000r/min and 7000r/min respectively.
The limitation of the working rotating speed of the compressor is as follows: limiting the maximum rotating speed of the compressor in the current working state, specifically: the maximum operating speed of the compressor is limited to Rcmax1 when the ambient temperature is below 35 ℃, to Rcmax2 when the ambient temperature is between 35 ℃ and 45 ℃, and to Rcmax3 when the ambient temperature is above 45 ℃.
b1. When the absolute value of the set temperature-the air outlet temperature is more than 5 ℃, PID is carried out on the basis of the difference value, the rotating speed of the compressor is adjusted, the rotating speed of the compressor is reduced, when the obtained rotating speed result of the compressor is less than Rmin, the actual rotating speed of the compressor is set to be Rmin, and the rotating speed of an internal blower is not adjusted.
b2. When the absolute set temperature-air outlet temperature is less than or equal to 5 ℃ and the absolute actual temperature-the set temperature is more than 2 ℃, performing PID (proportion integration differentiation) on the basis of the set temperature and the actual temperature of the passenger compartment, adjusting the rotating speed of the compressor, increasing or reducing the rotating speed of the compressor, setting the rotating speed of the actual compressor to Rmin when the obtained rotating speed result of the compressor is less than Rmin, setting the rotating speed of the actual compressor to Rcmax when the obtained rotating speed result of the compressor is greater than Rcmax, and not adjusting the rotating speed of the internal blower; rmin represents the minimum rotating speed of the compressor, 1000r/min in the embodiment, rcmax represents the maximum rotating speed of the compressor during refrigeration, 7000r/min in the embodiment.
b3. And when the absolute set temperature-air outlet temperature is less than or equal to 5 ℃ and the absolute actual temperature-set temperature is less than or equal to 2 ℃, the working rotating speed of the compressor is not adjusted, and the running time Tc min of the heat pump air conditioner in the current state is calculated.
b4. The rotating speed of the internal blower is reduced by Tc/3 gears, the maximum speed is reduced by 2 gears, and the lowest speed is L1 gear operation.
If the current indoor blower rotating speed is the highest gear L6, the gear of the indoor blower is reduced to L5 when Tc is 3, and the gear of the indoor blower is reduced to L4 when Tc is 6; if the current speed gear of the indoor blower is L5, the gear of the indoor blower is reduced to L4 when Tc is 3, and the gear of the indoor blower is reduced to L3 when Tc is 6; if the current indoor blower speed gear is L4, the indoor blower gear is reduced to L3 when Tc is 3, and the indoor blower gear is reduced to L2 when Tc is 6; if the current speed gear of the indoor blower is L3, the gear of the indoor blower is reduced to L2 when Tc is 3, and the gear of the indoor blower is reduced to L1 when Tc is 6; if the current indoor blower gear is L2, reducing the indoor blower gear to L1 when Tc is 3; and if the current indoor blower gear is the lowest gear L1, not changing the indoor blower gear.
c. The method comprises the following steps of limiting the working rotating speed of a compressor according to the current environment temperature of the electric automobile, wherein when the environment temperature is higher than-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax1, when the environment temperature is between-15 ℃ and-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax2, when the environment temperature is lower than-15 ℃, the rotating speed range of the compressor is Rmin to Rhmax3, and judging whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted according to the current state according to the following conditions: rhmax1, rhmax2, and Rcmax3 represent the rotational speeds of three different gears of the compressor during heating, which are 5000r/min,6000r/min, and 7000r/min, respectively, in this embodiment.
The limitation of the working rotating speed of the compressor comprises the following steps: limiting the maximum rotating speed of the compressor in the current working state, specifically: the maximum operating speed of the compressor is limited to Rhmax1 when the ambient temperature is higher than-5 ℃, to Rhmax2 when the ambient temperature is between-15 ℃ and-5 ℃, and to Rhmax3 when the ambient temperature is lower than-15 ℃.
c1. When the actual temperature and the set temperature are less than or equal to 3 ℃, the rotating speed of the compressor is not adjusted, and the rotating speed of the internal blower is not adjusted.
c2. And when the actual temperature-set temperature is higher than 3 ℃, PID is carried out on the basis of the difference value, the rotating speed of the compressor is adjusted, the rotating speed of the compressor is increased, and when the obtained rotating speed result of the compressor is higher than Rhmax, the actual rotating speed of the compressor is set to Rhmax, and the rotating speed of the internal blower is not adjusted. Rhmax represents the maximum rotational speed of the compressor during heating, and in this embodiment is 7000r/min.
c3. And when the actual temperature-set temperature is higher than 3 ℃, the actual working rotating speed of the compressor is Rhmax, and the temperature of the air outlet of the air conditioner is lower than 40 ℃, the working rotating speed of the compressor is not adjusted, and the running time Th min of the heat pump air conditioner in the current state is calculated.
c4. And the rotating speed of the internal blower is reduced by Th gears, and is reduced by 4 gears at most, and the internal blower is operated at the L1 gear at the lowest.
If the current indoor blower rotating speed is the highest gear L6, the gear of the indoor blower is lowered to L5 when Tc is 1, the gear of the indoor blower is lowered to L4 when Tc is 2, the gear of the indoor blower is lowered to L3 when Tc is 3, and the gear of the indoor blower is lowered to L2 when Tc is 4; if the current indoor blower speed gear is L5, the indoor blower gear is reduced to L4 when Tc is 1, the indoor blower gear is reduced to L3 when Tc is 2, the indoor blower gear is reduced to L2 when Tc is 3, and the indoor blower gear is reduced to L1 when Tc is 4; if the current indoor blower gear is L4, when Tc is 1, the indoor blower gear is reduced to L3, when Tc is 2, the indoor blower gear is reduced to L2, and when Tc is 3, the indoor blower gear is reduced to L1; if the current indoor blower gear is L3, when Tc is 1, the gear of the indoor blower is reduced to L2, and when Tc is 2, the gear of the indoor blower is reduced to L1; if the current indoor blower gear is L2, reducing the indoor blower gear to L1 when Tc is 1; and if the current indoor blower gear is the lowest gear L1, not changing the indoor blower gear.
The technical solutions claimed in the present invention include, but are not limited to, the above embodiments, and those skilled in the art can easily conceive of equivalent substitutions/modifications based on the above description of the present invention, which are within the protection scope of the spirit of the present invention.
Claims (5)
1. The method for controlling the temperature of the heat pump air conditioner of the electric automobile is characterized by comprising the following steps of:
a. analyzing the input target temperature to judge the working mode, entering the step b if the target temperature is in a cooling mode, and entering the step c if the target temperature is in a heating mode;
b. according to the current environment temperature of the electric automobile, limiting the working speed of the compressor: when the environment temperature is lower than 35 ℃, the rotating speed range of the compressor is Rmin to Rcmax1, when the environment temperature is between 35 ℃ and 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax2, when the environment temperature is higher than 45 ℃, the rotating speed range of the compressor is Rmin to Rcmax3, and whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted in the current state is judged according to the absolute value of the difference value between the set temperature and the temperature of an air outlet of the air conditioner and the absolute value of the difference value between the set temperature and the actual temperature of a passenger compartment, and the specific steps are as follows:
b1. when the absolute value of the difference between the set temperature and the air outlet temperature of the air conditioner is more than 5 ℃, performing PID (proportion integration differentiation) on the basis of the difference, adjusting the rotating speed of the compressor, reducing the rotating speed of the compressor, and when the rotating speed result of the compressor output by the PID is less than Rmin, setting the actual rotating speed of the compressor to be Rmin and not adjusting the rotating speed of an internal blower;
b2. when the absolute value of the difference value between the set temperature and the air outlet temperature of the air conditioner is less than or equal to 5 ℃ and the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment is more than 2 ℃, performing PID (proportion integration differentiation) on the basis of the set temperature and the actual temperature of the passenger compartment, adjusting the rotating speed of the compressor, increasing or reducing the rotating speed of the compressor, setting the rotating speed of the actual compressor to Rmin when the rotating speed result of the compressor output by the PID is less than Rmin, and setting the rotating speed of the actual compressor to Rcmax and not adjusting the rotating speed of the internal blower when the rotating speed result of the compressor output by the PID is greater than Rcmax;
b3. when the absolute value of the difference between the set temperature and the air outlet temperature of the air conditioner is less than or equal to 5 ℃ and the absolute value of the difference between the set temperature and the actual temperature of the passenger compartment is less than or equal to 2 ℃, the working rotating speed of the compressor is not adjusted, and the running time Tcmin of the heat pump air conditioner in the current state is calculated;
b4. reducing the rotating speed of the internal blower by Tc/3 gears, reducing the rotating speed by 2 gears at most, and operating the internal blower at the lowest gear L1;
c. according to the environment temperature of the current electric automobile, limiting the working speed of the compressor: when the environment temperature is higher than-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax1, when the environment temperature is between-15 ℃ and-5 ℃, the rotating speed range of the compressor is Rmin to Rhmax2, when the environment temperature is lower than-15 ℃, the rotating speed range of the compressor is Rmin to Rcmax3, and whether the working rotating speed of the compressor and the rotating speed of an internal blower need to be adjusted in the current state is judged according to the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment.
2. The method for controlling the temperature of the heat pump air conditioner of the electric automobile according to claim 1, characterized in that: the limiting of the working rotating speed of the compressor specifically comprises the following steps: in step b, when the ambient temperature is lower than 35 ℃, limiting the maximum working rotating speed of the compressor to Rcmax1, when the ambient temperature is between 35 ℃ and 45 ℃, limiting the maximum working rotating speed of the compressor to Rcmax2, and when the ambient temperature is higher than 45 ℃, limiting the maximum working rotating speed of the compressor to Rcmax3; in step c, the maximum operating speed of the compressor is limited to Rhmax1 when the ambient temperature is higher than-5 ℃, to Rhmax2 when the ambient temperature is between-15 ℃ and-5 ℃, and to Rhmax3 when the ambient temperature is lower than-15 ℃.
3. The method for controlling the temperature of the heat pump air conditioner of the electric automobile according to claim 1, characterized in that: the step b4 specifically includes: if the current indoor blower rotating speed is the highest gear L6, the gear of the indoor blower is reduced to L5 when Tc is 3, and the gear of the indoor blower is reduced to L4 when Tc is 6; if the current indoor blower speed gear is L5, the indoor blower gear is reduced to L4 when Tc is 3, and the indoor blower gear is reduced to L3 when Tc is 6; if the current speed gear of the indoor blower is L4, the gear of the indoor blower is reduced to L3 when Tc is 3, and the gear of the indoor blower is reduced to L2 when Tc is 6; if the current speed gear of the indoor blower is L3, the gear of the indoor blower is reduced to L2 when Tc is 3, and the gear of the indoor blower is reduced to L1 when Tc is 6; if the current indoor blower gear is L2, reducing the indoor blower gear to L1 when Tc is 3; and if the current indoor blower gear is the lowest gear L1, not changing the indoor blower gear.
4. The method for controlling the temperature of the heat pump air conditioner of the electric automobile according to the claim 1 or 2, characterized in that: step c, judging whether the working rotating speed of the compressor and the rotating speed of the internal blower need to be adjusted or not according to the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment, wherein the specific steps are as follows:
c1. when the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment is less than or equal to 3 ℃, the rotating speed of the compressor is not adjusted, and the rotating speed of the internal blower is not adjusted;
c2. when the absolute value of the difference between the set temperature and the actual temperature of the passenger compartment is more than 3 ℃, performing PID (proportion integration differentiation) on the basis of the difference, adjusting the rotating speed of the compressor, increasing the rotating speed of the compressor, and when the rotating speed result of the compressor output by the PID is greater than Rhmax, setting the actual rotating speed of the compressor to Rhmax and not adjusting the rotating speed of an internal blower;
c3. when the absolute value of the difference value between the set temperature and the actual temperature of the passenger compartment is more than 3 ℃, the actual working rotating speed of the compressor is Rhmax, and the temperature of the air outlet of the air conditioner is less than 40 ℃, the working rotating speed of the compressor is not adjusted, and the running time Th min of the heat pump air conditioner in the current state is calculated;
c4. and the rotating speed of the internal blower is reduced by Th gears, and is reduced by 4 gears at most, and the internal blower is operated at the L1 gear at the lowest.
5. The method for controlling the temperature of the heat pump air conditioner of the electric automobile according to claim 4, characterized in that: the step c4 specifically includes: if the current indoor blower rotating speed is the highest gear L6, the gear of the indoor blower is lowered to L5 when Tc is 1, the gear of the indoor blower is lowered to L4 when Tc is 2, the gear of the indoor blower is lowered to L3 when Tc is 3, and the gear of the indoor blower is lowered to L2 when Tc is 4; if the current indoor blower speed gear is L5, the indoor blower gear is reduced to L4 when Tc is 1, the indoor blower gear is reduced to L3 when Tc is 2, the indoor blower gear is reduced to L2 when Tc is 3, and the indoor blower gear is reduced to L1 when Tc is 4; if the current indoor blower gear is L4, when Tc is 1, the indoor blower gear is reduced to L3, when Tc is 2, the indoor blower gear is reduced to L2, and when Tc is 3, the indoor blower gear is reduced to L1; if the current indoor blower gear is L3, when Tc is 1, the gear of the indoor blower is reduced to L2, and when Tc is 2, the gear of the indoor blower is reduced to L1; if the current indoor blower gear is L2, reducing the indoor blower gear to L1 when Tc is 1; and if the current indoor blower gear is the lowest gear L1, not changing the indoor blower gear.
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| CN112757873B (en) * | 2021-01-28 | 2022-12-30 | 浙江合众新能源汽车有限公司 | Energy-saving logic design method of electric air conditioner |
| CN114132149B (en) * | 2021-12-30 | 2022-08-30 | 镇江东方电热科技股份有限公司 | Temperature planning method for heat pump air conditioner of electric vehicle |
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