CN116767139A - Defrosting and demisting method adopting air conditioner heat pump and vehicle - Google Patents
Defrosting and demisting method adopting air conditioner heat pump and vehicle Download PDFInfo
- Publication number
- CN116767139A CN116767139A CN202210239541.4A CN202210239541A CN116767139A CN 116767139 A CN116767139 A CN 116767139A CN 202210239541 A CN202210239541 A CN 202210239541A CN 116767139 A CN116767139 A CN 116767139A
- Authority
- CN
- China
- Prior art keywords
- air
- defrosting
- temperature
- vehicle
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000004378 air conditioning Methods 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 20
- 238000007791 dehumidification Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000005357 flat glass Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 abstract description 24
- 230000001105 regulatory effect Effects 0.000 description 13
- 230000000007 visual effect Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air
Abstract
The invention provides a defrosting and defogging method by an air conditioner heat pump and a vehicle, belongs to the technical field of vehicle defrosting and defogging, and particularly relates to a defrosting and defogging method for the inner surface of a vehicle windshield. When needs defrosting defogging, through judging the outside air, if outside air is dry air, then carry out defrosting defogging after heating the outside air, if outside air is wet air, then heat after dehumidify the outside air to with the dry hot air flow who obtains of heating defrosting defogging, can form fog earlier on the glass when having avoided defrosting, influence the problem of driver's field of vision, reduced the potential safety hazard.
Description
Technical Field
The invention relates to a defrosting and defogging method by an air conditioner heat pump and a vehicle, belongs to the technical field of vehicle defrosting and defogging, and particularly relates to a defrosting and defogging method for the inner surface of a vehicle windshield.
Background
In the preparation driving or driving stage, the driver needs to observe the front part and the surrounding environment of the automobile through the front windshield and the automobile window, so that the front windshield and the automobile window glass are required to be ensured to be clean and tidy, and good visual field guarantee is provided for the safe driving of the driver.
During driving or stopping, there may be a temperature difference between the temperature of the glass and the temperature in the vehicle due to the temperature difference between the two sides of the glass, i.e. the vehicle interior and the vehicle exterior. When the temperature in the vehicle is higher than the glass temperature, the high-temperature air in the vehicle contacts the surface of the glass, and moisture in the air can form fog near the glass, so that the visual field of a driver is influenced.
If the temperature of the glass is further reduced, the formed fog can be condensed into frost on the inner side of the glass, commonly called internal frost; if there is snow or frost rain outside the vehicle, the snow or ice layer is formed on the outer side of the glass, commonly called external frost. If the inner frost or the outer frost cannot be melted in time, the visual field of a driver can be influenced.
The automobile generally adopts a defroster or an air conditioner, and hot air is blown to the fog or frosted part so as to achieve the aim of quick defrosting and demisting. With the popularization of electric vehicles, defrosters or air conditioners also apply a pure electric driving technology. The air conditioner adopts pure electric drive to increase the power consumption and influence the endurance mileage, so as to reduce the power consumption as much as possible, and the air conditioner heat pump technology is generally adopted in the industry to save energy.
When the air conditioner heat pump technology is adopted to defrost, fog can be formed on the front windshield first, then the fog is gradually eliminated, so that the defrosting efficiency is reduced, the frost on the glass cannot be directly eliminated, a good visual field cannot be provided for a driver, and the driving safety is affected.
Disclosure of Invention
The invention aims to provide a defrosting and demisting method by adopting an air conditioner heat pump and a vehicle, which are used for solving the problem that the existing electric automobile cannot be directly defrosted when frost is formed on glass.
In order to achieve the above purpose, the invention provides a defrosting and demisting method by adopting an air conditioner heat pump, which comprises the following steps:
s1, when defrosting and demisting requirements exist, an air conditioner controller controls a defrosting air door to be opened, a channel of air outside a vehicle to flow to a heater is conducted, and a defrosting blower is started;
s2, the air conditioner controller acquires the temperature of the air outside the vehicle, and simultaneously starts an external circulation air door; if the temperature of the air outside the vehicle is smaller than the first set temperature, the compressor is not started, and if the temperature of the air outside the vehicle is larger than the first set temperature, the compressor is started to dehumidify the air outside the vehicle; the first set temperature is the air temperature when the absolute water content of the air in the natural environment is lower than a set value;
and S3, heating the dry air obtained in the step S2 by a heater to obtain dry hot air flow, and defrosting and demisting the inner surface of the window glass by the dry hot air flow.
When needs defrosting defogging, through judging the outside air, if outside air is dry air, then carry out defrosting defogging after heating the outside air, if outside air is wet air, then heat after dehumidify the outside air to with the dry hot air flow who obtains of heating defrosting defogging, can form fog earlier on the glass when having avoided defrosting, influence the problem of driver's field of vision, reduced the potential safety hazard.
Further, in the above method, in step S2, the process of starting the compressor to dehumidify includes: if the temperature of the air outside the vehicle is higher than the second set temperature, starting a compressor, controlling the refrigerant to evaporate and absorb heat in the first heat exchanger, and condensing and dehumidifying the air outside the vehicle; if the temperature of the air outside the vehicle is smaller than the second set temperature, starting a compressor and controlling the refrigerant to condense and release heat in the second heat exchanger to heat and dehumidify the air outside the vehicle; the second set temperature is greater than the first set temperature; the compressor, the first heat exchanger and the second heat exchanger are mutually connected to form a refrigerant circulation.
When the temperature of the air outside the vehicle is higher than the set temperature, controlling the refrigerant to flow to the first heat exchanger, and evaporating and absorbing heat in the first heat exchanger by the refrigerant to reduce the moisture in the air outside the vehicle flowing through the first heat exchanger to obtain dry air; when the temperature of the air outside the vehicle is smaller than the set temperature, controlling the refrigerant to flow to the second heat exchanger, condensing and releasing heat in the second heat exchanger, heating the air outside the vehicle flowing through the second heat exchanger, and eliminating moisture to obtain dry air. By adopting the air conditioner heat pump function, the dehumidification of the air outside the vehicle is realized, and the energy of the whole vehicle is saved.
Further, in the above method, when the outside air is dehumidified, the temperature of the second heat exchanger is obtained; if the temperature of the second heat exchanger is smaller than the first set temperature, controlling the compressor to enter a low-speed running state, and if the temperature of the second heat exchanger is larger than the first set temperature, increasing the rotating speed of the condensing fan; the condensing fan is used for radiating heat of the first radiator.
When the temperature of the second heat exchanger is smaller than the first set temperature, the rotating speed of the compressor is reduced, so that the phenomenon that the surface temperature of the second heat exchanger is too low, refrigerant is not evaporated fully and the liquid impact risk of the compressor is caused can be prevented; and meanwhile, the quality risk of the compressor is prevented from being damaged by reducing the refrigerating capacity of the air conditioner.
Further, in the above method, if the temperature of the second heat exchanger is detected to be greater than the third set temperature during the low-speed operation of the compressor, the rotation speed of the compressor is increased, and the rotation speed of the defrost blower is increased.
And when the temperature of the second heat exchanger is greater than the set temperature value, increasing the rotation speed of the compressor, so that the refrigerant flowing into the second heat exchanger is increased, and simultaneously increasing the rotation speed of the defrosting blower and increasing the working efficiency of the air conditioner heat pump.
Further, in the above method, when the defrost blower is started, the defrost blower is controlled to be in a low-speed operation state.
The defrosting blower is controlled to run at a low speed to form low-speed air flow, so that the temperature of the air flow can be quickly increased during heating, meanwhile, the air flow is dehumidified, the condition that the high-humidity air is not dehumidified and is quickly sent to the front windshield can be avoided, and a large amount of fog is quickly formed on the front windshield, so that the visual field is influenced and the driving safety is influenced.
Further, in the above method, before the defrost blower is started, the defrost damper is controlled to be opened.
The defrosting air door is started before the defrosting blower, so that the running resistance when the defrosting air door is started is reduced, the running power of a motor of the defrosting air door is reduced, the abnormal sound risk when the defrosting air door runs is reduced, and the whole service life of the defrosting air door can be prolonged.
Further, in the method, the temperature of the dry hot air flows is obtained, and if the temperature of a plurality of hot air flows is higher than the fourth set temperature, the defrosting blower is controlled to be in a medium-speed running state.
The defrosting blower is started at a medium speed, so that the defrosting blower is beneficial to quick defrosting, the hidden danger of excessive noise caused by high-speed operation of the defrosting blower can be avoided, and the hidden danger that the temperature of air flow rises too fast due to the adoption of a medium-low rotating speed, so that a heater is triggered to stop quickly and frost or fog on a vehicle window is not removed can be avoided.
Further, in the above method, if the temperature of the plurality of hot air streams is greater than the fifth set temperature, the gear of the heater is reduced.
When the temperature of the dry and hot air flow is too high, the gear of the heater is reduced to reduce the air outlet temperature, so that the excessive air flow temperature is prevented from being blown onto a driver, and uncomfortable feeling is avoided.
Further, in the above method, if the outside air temperature is less than the sixth set temperature, the heater is started to perform preheating, so that the heater quickly reaches the set preheating temperature.
If the ambient temperature is higher than the sixth set temperature, the whole vehicle energy is consumed by starting the heater, and the endurance mileage is affected, so that the heater can quickly reach the set preheating temperature by a preheating method, and the energy consumption and the quality hidden trouble caused by quick shutdown after quick heating can be avoided under the conditions that the starting time of the subsequent breeze and the condensation dehumidification function is lagged and the dehumidification is not completed.
The invention also provides a vehicle adopting the air-conditioning heat pump for defrosting and demisting, which comprises a controller, wherein the controller executes instructions to realize the method adopting the air-conditioning heat pump for defrosting and demisting.
Drawings
FIG. 1 is a block diagram of an air conditioning system in an embodiment of the method of the present invention;
FIG. 2 is a flow chart of a defrost defogging method in an embodiment of the method of the present invention.
In the figure, 1 is a compressor, 2 is a one-way valve, 3 is a four-way valve, 31, 32, 33 and 34 are four valve ports of the four-way valve, 4 is a gas-liquid separator, 5 is a first heat exchanger, 6 is a condensing fan, 7 is a defrosting blower, 8 is a second heat exchanger, 9 is an electric heater, 10 is a dry filter, 11 is a first electronic regulating valve, 12 is a second electronic regulating valve, and 13 is a filter.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Method embodiment:
the invention relates to a defrosting and demisting method by adopting an air-conditioning heat pump, which adopts an air-conditioning heat pump technology, and the basic principle of the technology is as follows: the air conditioner refrigerating reverse operation technology is adopted, and the heat release side outside the vehicle is converted into the vehicle when the air conditioner is refrigerated, so that the generated heat is larger than the consumed electric power, and the heat pump heating efficiency is commonly called. Under a certain temperature condition, the efficiency is more than 1, and compared with the pure electric heating, the electric heating device is more energy-saving.
The installation space of an air conditioner or defroster in an automobile is limited, and the same key control is generally adopted during defrosting and demisting operations, and the same control strategy is adopted during the control process. Therefore, the control principle of the defrosting operation, the defogging operation, and the defrosting defogging operation performed on the glass of the electric vehicle is equivalent, and in this embodiment, the present invention will be described by taking the defrosting operation as an example.
For the sake of understanding, an air conditioning system of an automobile will be described first, and its structure is shown in fig. 1, and includes a compressor 1, a check valve 2, a four-way valve 3, a gas-liquid separator 4, a first heat exchanger 5, a condensing fan 6, a defrost blower 7, a second heat exchanger 8, an electric heater 9, a dry filter 10, a first electronic control valve 11, a second electronic control valve 12, and a filter 13.
The compressor 1 is connected with a valve port 31 of the four-way valve 3 through a pipeline and a one-way valve 2 arranged on the pipeline, and the compressor 1 is also connected with a valve port 34 of the four-way valve 3 through a pipeline and a gas-liquid separator 4 arranged on the pipeline. The valve port 33 of the four-way valve 3 is connected to the valve port 34 after being connected with the first heat exchanger 5 and the second heat exchanger 8 in sequence, the drying filter 10, the first electronic regulating valve 11 and the filter 13 are sequentially arranged on a pipeline of the first heat exchanger 5 connected with the second heat exchanger 8, and the second electronic regulating valve 12 is arranged at two ends of the second heat exchanger 8. The first heat exchanger 5 is positioned in the air flow generated when the condensing fan 6 works and is used for exchanging heat with the air outside the vehicle; the second heat exchanger 8 and the electric heater 9 are sequentially positioned in the air flow generated when the defrosting blower 7 works, and are used for exchanging heat with the air in the vehicle.
The opening degree of the first electronic regulating valve 11 is regulated according to the temperature of the refrigerant in the pipeline. The second electronic regulating valve 12 is controlled to be opened or closed according to the battery temperature, so that the battery temperature control requirement in the defrosting state of the air conditioner heat pump is ensured.
Specifically, when defrosting is required, the defrosting and defogging method adopting the air conditioner heat pump is realized by adopting the flow shown in fig. 2, so that the frost on glass is removed. The method comprises the following steps:
s1, a driver operates a defrosting and defogging button, a defrosting function is started, and a defrosting instruction is sent to an air conditioner controller. After receiving the defrosting instruction, the air conditioner controller opens a defrosting air door to a defrosting mode, so that air flows to the directions of the air channel interfaces of the front windshield glass, the side window glass and the passenger door glass through the defrosting air door; the cold and warm air door is also opened to a warm ventilation mode to guide air to the direction of the heater inside the air conditioner.
In this embodiment, the mode of opening the defrosting air door first and then opening the cooling air door is adopted, and as other embodiments, the opening sequence of the defrosting air door and the cooling air door is not limited, the cooling air door can be opened first and then the defrosting air door can be opened, and the cooling air door and the defrosting air door can be opened simultaneously.
S2, starting the defrosting blower 7 and controlling the defrosting blower to be in a low-speed running state.
S3, detecting the environment temperature T outside the vehicle, and comparing the environment temperature T with a first preset temperature T1 acquired in advance. If T is smaller than T1, the water content in the air of the environment outside the vehicle is considered to be extremely low, and the air can be considered to be dry air, and the step S4.1 is executed; if T is greater than or equal to T1, it is considered that the air in the environment outside the vehicle has a high water content, and the air is considered as humid air, and step S4.2 is performed.
The first set temperature T1 is determined by the following method: and spraying air with different temperatures and different humidity to the surface of the glass by adopting glass with lower temperature, observing whether the surface of the glass forms frost or fog, counting an observation result, and carrying out data analysis so as to obtain a first set temperature T1. When the air temperature is lower than the first set temperature T1, the water vapor content in the air is extremely low, and the defrosting is performed by using such air, so that the visual field is not affected even if the water vapor condenses on the glass surface.
And S4.1, when T is smaller than T1, the air conditioner controller sends out an instruction, does not allow the compressor to operate, controls the external circulation air door to open, enables air outside the vehicle to circulate, facilitates dry air outside the vehicle to enter the vehicle for defrosting operation, and then executes step S5.
And S4.2, when T is greater than or equal to T1, the air conditioner controller sends out a command to adjust the four-way valve 3. If T is greater than or equal to a second set temperature T2, controlling the communication between a valve port 31 and a valve port 33 of the four-way valve 3 and between a valve port 32 and a valve port 34, so as to realize condensation and dehumidification of the air conditioner; if T is smaller than the second set temperature T2, the valve port 31 and the valve port 32 of the four-way valve 3 are controlled to be communicated, and the valve port 33 and the valve port 34 are controlled to be communicated, so that the heating and the dehumidification of the air conditioner are realized.
In this embodiment, the four-way valve 3 is opened first, then the first electronic regulating valve 11 is opened, and the second electronic regulating valve 12 is opened under the condition that the heat exchange requirement exists in the battery. As other embodiments, the opening sequence of the four-way valve 3, the first electronic control valve 11, and the second electronic control valve 12 is not limited.
The condensation and dehumidification functions of the air conditioner are realized through the following control flow:
the air conditioner controller controls the first electronic regulating valve 11 to open, and conducts a refrigerant channel between the first heat exchanger 5 and the second heat exchanger 8. The air conditioner controller acquires the internal pressure P of the air conditioning system, and if P is greater than or equal to the set low pressure P1 and less than the set high pressure P2, the condensing fan 6 is started and the condensing fan 6 is controlled to be in a low-speed running state; subsequently, the compressor 1 is started, the compressor 1 is controlled to be in a low-speed running state, then the rotation speed of the compressor 1 is gradually increased, and the rotation speed of the defrosting blower 7 is also increased. The refrigerant flows from the compressor 1 to the first heat exchanger 5, at this time, the refrigerant evaporates and absorbs heat in the first heat exchanger 5, and cools the air outside the vehicle, so as to condense and dehumidify the wet air entering the vehicle, and the moisture in the air condenses on the surface of the first heat exchanger 5, so that the moisture in the air is removed, and the dehumidified dry air of the air conditioner is obtained.
The heating and dehumidifying functions of the air conditioner are realized through the following control flow:
and opening the external circulation air door to enable the air inside and outside the vehicle to circulate. Then the air conditioner controller controls the first electronic regulating valve 11 to open, and the refrigerant channel between the first heat exchanger 5 and the second heat exchanger 8 is conducted. The air conditioner controller acquires the internal pressure P of the air conditioning system, and if P is greater than or equal to the set low pressure P1 and less than the set high pressure P2, the condensing fan 6 is started and the condensing fan 6 is controlled to be in a low-speed running state; subsequently, the compressor 1 is started, the compressor 1 is controlled to be in a low-speed running state, then the rotation speed of the compressor 1 is gradually increased, and the rotation speed of the defrosting blower 7 is also increased. The refrigerant flows from the compressor 1 to the second heat exchanger 8, at this time, the refrigerant condenses and releases heat in the second heat exchanger 8, the wet air entering the vehicle is heated and dehumidified, and the moisture in the air is heated and lost, so that the moisture in the air is removed, and the dehumidified dry air of the air conditioner is obtained.
If the internal pressure P of the air conditioning system is greater than the set high pressure P2 or lower than the set low pressure P1, the compressor 1 is controlled not to be started, and a fault is reported.
After the defrosting blower speed is raised to the medium and low speed, the temperature t1 near the second heat exchanger 8 is detected. When T1 is greater than or equal to T1, the rotation speed of the condensing fan 6 is regulated to adapt to the internal pressure of the air conditioning system; when T1 is smaller than T1, the rotating speed of the compressor 1 is reduced, and the compressor 1 is controlled to be in a low-speed running state, so that the refrigerating capacity of the air conditioner is reduced, the surface temperature of the second heat exchanger 8 is prevented from being too low, and the liquid impact risk of the compressor caused by incomplete refrigerant evaporation is reduced; when T1 is greater than the third set temperature T3, the rotation speed of the compressor 1 is controlled to be gradually increased.
S5, when the dry air outside the vehicle or the dehumidified dry air of the air conditioner flows to the heater 9 through the cold and warm air door, the gear of the heater 9 is adjusted to a set gear, so that the dry air is heated, dry hot air flow is obtained, and the dry hot air flow is blown to the front windshield glass, the side window glass and the passenger door glass from the defrosting air door, so that frost on the glass is removed, and the visual field requirement of a driver is ensured.
When the dry hot air flow is defrosted, the temperature T2 of the dry hot air flow is detected, and when T2 is larger than or equal to the fourth set temperature T4, the defrosting blower 7 is controlled to be in a medium-speed running state, so that the quick defrosting is facilitated, the hidden noise trouble caused by high-speed running can be avoided, and the situation that the heater 9 is stopped quickly due to too high air flow temperature rise during medium-low-speed running, so that frost on glass is not removed can be avoided.
After the defrosting blower 7 is controlled to run at medium speed, the temperature T2 of the dry heat air flow is detected again, and when T2 is larger than or equal to the fifth set temperature T5, the gear of the heater 9 is adjusted to reduce the output power of the heater, so that the temperature of the dry heat air flow is reduced, and the air flow with overhigh temperature is prevented from being blown onto a driver, and discomfort of the driver is avoided.
Since the heater 9 heats by adopting an electric heating mode, the heating speed is high, if the heater is started when a plurality of air flows to the heater 9, the heater stops heating after reaching a set stop heating temperature value soon, so that the heating time is too short, and the situation that the humid air is not completely dehumidified may exist. Therefore, by setting the sixth set temperature T0, compared with the ambient temperature T, when the ambient temperature T is less than or equal to the sixth set temperature T0, the micro-preheating function of the heater 9 is started in advance for increasing the internal temperature of the heater, so that when T is greater than T0, the heater is prevented from being started in advance to consume the whole vehicle energy, and the cruising mileage is prevented from being influenced.
By adopting the invention, under the condition that the window glass is frosted, the defrosting can be carried out through the dry and hot air flow, so that fog is prevented from being generated in the defrosting process, and the visual field of a driver is prevented from being influenced; and can once only get rid of fog at defogging in-process, improved defrosting defogging efficiency, satisfied driver's driving demand, reduced vehicle driving hidden danger.
In addition, the invention has the following advantages:
1) In the control logic, the defrosting air door and the cold and hot air door are opened firstly, and then the defrosting air blower is opened, so that the operating resistance when the air door is opened is reduced, the operating power of an air door motor is reduced, the energy is saved, the abnormal sound risk when the air door operates is reduced, and the service life of the air door is prolonged.
2) And detecting the temperature T of the outside of the vehicle, and comparing the detected temperature T with a first preset temperature T1 acquired in advance, so as to judge the humidity of the air outside the vehicle. When the air outside the vehicle is dry air, the air outside the vehicle is directly heated by the dry air outside the vehicle, so that dry hot air flow is obtained and used for defrosting and demisting; and when the air outside the vehicle is wet air, the air conditioner heat pump is adopted for dehumidification to obtain dry air, and then the dry air is heated to obtain dry hot air flow for defrosting and demisting.
3) When the air conditioner heat pump is adopted for dehumidification, the outdoor environment temperature T is compared with a second preset temperature T2 which is acquired in advance. When T is larger than T2, the dry air is obtained by adopting a condensation dehumidification mode, and the dehumidification effect is good; when T is larger than T1 and smaller than T2, the dry air is obtained by adopting a heating and dehumidifying mode, thereby playing a role in energy saving,
4) The condensing fan is started before the compressor is started, so that the quality hidden trouble caused by pressure mutation in the air conditioning system due to working lag of the condensing fan caused by the starting of the compressor can be avoided. Meanwhile, the condensing fan adopts a low-speed, medium-speed, low-speed and medium-speed rotating speed regulating strategy, so that noise, diagnosis and energy consumption caused by high-speed operation of the condensing fan can be reduced, the refrigerant in the first heat exchanger can be condensed when the compressor is started, heat can be dissipated in time, and the pressure in an air conditioning system is reduced.
Vehicle embodiment:
the invention provides a vehicle adopting an air-conditioning heat pump for defrosting and demisting, which adopts the method adopting the air-conditioning heat pump for defrosting and demisting in the embodiment of the method, and the implementation of the method is clearly understood in the embodiment of the method and is not described herein.
Claims (10)
1. The defrosting and demisting method adopting the air conditioner heat pump is characterized by comprising the following steps of:
s1, when defrosting and demisting requirements exist, an air conditioner controller controls a defrosting air door to be opened, a channel of air outside a vehicle to flow to a heater is conducted, and a defrosting blower is started;
s2, the air conditioner controller acquires the temperature of the air outside the vehicle, and simultaneously starts an external circulation air door; if the temperature of the air outside the vehicle is smaller than the first set temperature, the compressor is not started, and if the temperature of the air outside the vehicle is larger than the first set temperature, the compressor is started to dehumidify the air outside the vehicle; the first set temperature is the air temperature when the absolute water content of the air in the natural environment is lower than a set value;
and S3, heating the dry air obtained in the step S2 by a heater to obtain dry hot air flow, and defrosting and demisting the inner surface of the window glass by the dry hot air flow.
2. The method for defrosting and demisting by using an air-conditioning heat pump according to claim 1, wherein in step S2, the process of starting the compressor for dehumidification includes: if the temperature of the air outside the vehicle is higher than the second set temperature, starting a compressor, controlling the refrigerant to evaporate and absorb heat in the first heat exchanger, and condensing and dehumidifying the air outside the vehicle; if the temperature of the air outside the vehicle is smaller than the second set temperature, starting a compressor and controlling the refrigerant to condense and release heat in the second heat exchanger to heat and dehumidify the air outside the vehicle; the second set temperature is greater than the first set temperature; the compressor, the first heat exchanger and the second heat exchanger are mutually connected to form a refrigerant circulation.
3. The method for defrosting and demisting by using an air-conditioning heat pump according to claim 2, wherein the temperature of the second heat exchanger is obtained when the outside air is dehumidified; if the temperature of the second heat exchanger is smaller than the first set temperature, controlling the compressor to enter a low-speed running state, and if the temperature of the second heat exchanger is larger than the first set temperature, increasing the rotating speed of the condensing fan; the condensing fan is used for radiating heat of the first radiator.
4. A method of defrost and defog using an air conditioner heat pump as claimed in claim 3 wherein the compressor speed is increased and the defrost blower speed is increased if the temperature of the second heat exchanger is detected to be greater than a third set temperature during low speed operation of the compressor.
5. The method for defrosting and defogging by using an air conditioner heat pump as recited in claim 1, wherein the defrosting blower is controlled to be in a low speed operation state when the defrosting blower is started.
6. The method of defrosting and defogging using an air conditioning heat pump of claim 5 wherein the defrost damper is controlled to open prior to the defrost blower being activated.
7. The method for defrosting and demisting by using an air-conditioning heat pump according to claim 1, wherein the temperature of the dry hot air flows is obtained, and the temperature of a plurality of hot air flows is higher than a fourth set temperature, and the defrosting blower is controlled to be in a medium-speed running state.
8. The method of defrosting and demisting using an air-conditioning heat pump according to claim 7, wherein the temperature of the plurality of hot air streams is greater than a fifth set temperature, the gear of the heater is lowered.
9. The method for defrosting and demisting by using an air-conditioning heat pump according to claim 1, wherein if the outside air temperature is less than a sixth set temperature, the heater is started to perform preheating, so that the heater quickly reaches the set preheating temperature.
10. A vehicle employing an air conditioning heat pump to defrost and defog comprising a controller executing instructions to implement the method of employing an air conditioning heat pump to defrost and defog of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239541.4A CN116767139A (en) | 2022-03-11 | 2022-03-11 | Defrosting and demisting method adopting air conditioner heat pump and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239541.4A CN116767139A (en) | 2022-03-11 | 2022-03-11 | Defrosting and demisting method adopting air conditioner heat pump and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116767139A true CN116767139A (en) | 2023-09-19 |
Family
ID=88008664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210239541.4A Pending CN116767139A (en) | 2022-03-11 | 2022-03-11 | Defrosting and demisting method adopting air conditioner heat pump and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116767139A (en) |
-
2022
- 2022-03-11 CN CN202210239541.4A patent/CN116767139A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107160972B (en) | Electric automobile, heat pump air conditioner assembly of electric automobile and control method of heat pump air conditioner assembly | |
| US9656535B2 (en) | Method for operating an air conditioner for a motor vehicle | |
| CN102889653B (en) | Heat pump system and its control method for vehicle | |
| JP6041423B2 (en) | Vehicular heat pump system and control method thereof | |
| EP2626223B1 (en) | Air conditioner for electric vehicle | |
| CN110530045B (en) | Transcritical CO2System multifunctional defogging and dehumidifying system and control method | |
| CN106608157B (en) | Air conditioning system and air conditioning control method | |
| CN110530046B (en) | Transcritical CO2System temperature and humidity self-adaptive dehumidification and demisting system and control method | |
| JP3596090B2 (en) | Vehicle air conditioner | |
| CN105922845A (en) | Air conditioning system for electric vehicle and electric vehicle | |
| CN103162360B (en) | A kind of automotive air-conditioning system | |
| CN114126900A (en) | Air conditioning equipment for vehicle | |
| CN205736772U (en) | Electric automobile air-conditioning system and electric automobile | |
| CN111169250A (en) | Automobile heat pump air conditioning system capable of dehumidifying simultaneously in heating mode | |
| CN212738014U (en) | Automobile defogging defrosting system and automobile | |
| WO2019058826A1 (en) | Vehicle air conditioner | |
| JP2004042759A (en) | Air conditioner for automobile | |
| JP2010006325A (en) | Air conditioner | |
| CN113173051B (en) | Heat pump air conditioning system for vehicle and control method thereof | |
| KR101498088B1 (en) | Air conditoner for electric vehicle | |
| CN116767139A (en) | Defrosting and demisting method adopting air conditioner heat pump and vehicle | |
| JP2015128961A (en) | Vehicular air-conditioner | |
| CN113811727B (en) | Air conditioning device for vehicle | |
| CN111775889A (en) | Automobile defogging and defrosting system, automobile and automobile defogging method | |
| US20110197614A1 (en) | Dehumidification system for a vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |