JP3463307B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to air conditioning in a vehicle cabin.
Related to air conditioners for vehicles,
Suitable for vehicles that do not have a surplus heat source such as moving vehicles
Related to air conditioners. [0002] 2. Description of the Related Art Generally, in an air conditioner for a vehicle, a cabin is used.
Heating the air sent into the vehicle cools the engine for driving the car
It uses the heat of water, but has a surplus heat source like an electric car
In the case of a car without
Because it cannot be used to heat the air blown into
Can't use a refrigeration cycle (heat pump)
I was trying to heat the cabin. [0003] SUMMARY OF THE INVENTION
If the vehicle interior is heated using a cycle,
Operation (starting of the refrigerant compressor) and ventilation (
At the start of heating operation.
In the meantime, cold air blows into the passenger compartment,
There was a problem that the feeling was reduced. According to the present invention, a refrigeration cycle is used to
In a vehicle to be heated, when the heating operation starts,
Prevents air blowing and improves air conditioning feeling for vehicle occupants
To provide a vehicle air conditioner that is improved
And [0005] [Means for Solving the Problems]Claim 1invention
Is a duct that forms an air passage into the cabin, and this duct
Blower that sends air into the cabin through the
And a refrigerant compressor for compressing and discharging
The refrigerant discharged from the refrigerant compressor
Exchange that heats the air by exchanging heat with the air sent to
Refrigeration cycle with a heater and a finger for instructing heating of the cabin
Indicating means;Pressure of high-pressure refrigerant discharged from refrigerant compressor
Refrigerant pressure for detecting forceDetecting means;Face mode or
Indicates either the bi-level mode or the foot mode
Control device that determines whether or not the
There, Heating of the cabin was instructed by the instruction means
At this time, the refrigerant compressor is started, andThe face model
Mode or the bi-level mode or the foot mode
Mode is set to one of the
The high-pressure refrigerant detected by the refrigerant pressure detecting means.
Until the pressure reaches the specified pressureStop operation of the blower
Along withHeating of the cabin is instructed by the instruction means.
When the refrigerant compressor is started,
Mode or the bi-level mode or the foot
Mode is not set to one of the blowout modes.
If rejectedAnd control means for activating the blower.
The technical means provided were employed. In addition,Refrigerant pressureDetection means and
Was discharged from the refrigerant compressorHigh pressureDetect refrigerant temperature
Out of the refrigerant temperature sensor, discharged from the refrigerant compressorHigh pressure
A refrigerant pressure sensor that detects the pressure of the refrigerant may be used.
No. [0006] [Action]Claim 1According to the invention, the instruction means
Is instructed to heat the passenger compartmentWhen face mode or
Indicates either the bi-level mode or the foot mode
Determined to be in outgoing modeIf the blower
Stops the operation of the refrigeration cycle by starting the refrigerant compressor
Only drive. Then, the refrigerant compressor discharges
The temperature of the discharged high-pressure refrigerant and the pressure of the high-pressure refrigerant rapidly rise
And heat is not dissipated from the heat exchanger.
Accordingly, the temperature of the refrigerant in the heat exchanger also rises sharply. this
Refrigeration cycle operating conditionsIe, refrigerant compressor
The pressure of the high-pressure refrigerant discharged fromDetected by detection means
Put out thatThe pressure of the high-pressure refrigerant reaches a predetermined pressureUsUntil cold
Stop the operation of the blower while starting the medium compressorLet
Heat through the heat exchanger
Then, the air sent into the vehicle compartment is heated. By this
Of the cool air in the cabin when the
A balloon can be prevented. [0007] 【Example】 Next, the vehicle air conditioner of the present invention will be described.
Description will be made based on one embodiment shown in the drawing. 1 and 2
Shows an example in which the present invention is applied to an air conditioner for an electric vehicle.
FIG. The air conditioner 1 for an electric vehicle is
Duct 2 forming an air passage for sending air toward
You. This duct 2 is arranged in the vehicle interior,
A blower 4 equipped with inside / outside air switching means 3 is connected to the end.
ing. The inside / outside air switching means 3 communicates with the vehicle interior to
Inside air inlet 5 for introducing indoor air (inside air) and outside the vehicle
Outside air inlet that communicates with the air and introduces air (outside air) outside the cabin
6 is provided. And the inside / outside air switching means 3 is
A spare damper 7 is provided.
It is possible to switch between the inside air and outside air
Can be. The blower 4 includes a fan case 8, an indoor fan
9, consists of indoor fan motor 10, motor 10 is energized
The indoor fan 9 rotates when it receives the
And send it to the vehicle cabin through The other end of the duct 2 passes through the inside of the duct 2
The air outlet that blows out the air
Have been. This air outlet is aimed mainly at the head and chest of the vehicle occupant.
Face outlet 11 that blows cold air to the vehicle
A foot outlet 12 that mainly blows warm air toward the source,
Mainly blow warm air toward the inside of the windshield of
And a defroster outlet 13 for blowing out. And da
In the air duct 2, each air outlet is connected to each air outlet.
Damper 14, foot dam to control airflow to
A pad 15 and a defroster damper 16 are provided. The refrigerant and the air are heated in the duct 2.
Heat on the upstream side of the refrigeration cycle 17 that cools the air by replacing
An exchanger 18 is provided. This upstream heat exchanger 18
Has only the function of a refrigerant evaporator.
It is provided so that all the air inside can pass through. Also,
Downstream of the upstream heat exchanger 18, heat exchange between refrigerant and air
Heat exchange downstream of the refrigeration cycle 17 that heats the air
A vessel 19 is provided. This downstream heat exchanger 19 is
It performs only the function of a refrigerant condenser, and has upstream heat exchange
As in the case of the vessel 18, the air in the duct 2 passes through
It is provided in. Furthermore, downstream of the downstream heat exchanger 19
Is provided with an auxiliary heater 20. This auxiliary
The heater 20 is an electric heater such as a PTC heater.
Then, heat is generated and the air flowing in the duct 2 is heated. The refrigeration cycle 17 shown in this embodiment is
In the accumulator cycle, the upstream heat exchanger 18 described above is used.
And in addition to the downstream heat exchanger 19, the outdoor heat exchanger 21,
Refrigerant compressor 22, first decompression device 23, second decompression device 2
4. Turn off the accumulator 25 and the flow direction of the refrigerant.
It has a flow path switching means for switching. The outdoor heat exchanger 21
Heat exchange between air and refrigerant outside the cabin outside duct 2
Air that exchanges heat with the refrigerant
An outdoor fan 26 for sending to the exchanger 21 is provided. Outdoor fan
26 is driven to rotate by an outdoor fan motor 261. The refrigerant compressor 22 is, as shown in FIG.
The suction, compression, and discharge of the refrigerant are performed by the electric motor 22.
1 is driven to rotate. This refrigerant compressor 22 is electrically driven.
The motor 221 is disposed in a sealed case 224 integrally with the motor 221.
ing. The electric motor 221 is driven by the inverter 223.
Three-phase AC induction motor whose rotation speed is variable by frequency control
Change in the rotation speed of the electric motor 221
The refrigerant discharge amount of the refrigerant compressor 22 changes. Note that this
In the embodiment, the capacity by the change in the rotation speed of the refrigerant compressor 22
The outlet temperature is controlled by the change. The first pressure reducing device 23 is connected to the upstream heat exchanger 18.
Fixed-restriction capillary that decompresses and expands refrigerant flowing into the chamber
And the second pressure reducing device 24 flows to the outdoor heat exchanger 21.
Fixed-throttle capillary that expands the incoming refrigerant under reduced pressure
It is. The accumulator 25 is connected to the refrigeration cycle 17.
The excess refrigerant in the compressor is stored and the refrigerant compressor 22 is gas cooled.
The liquid refrigerant is sucked into the refrigerant compressor 22.
Two are provided to prevent this. [0015] The refrigerant flow switching means is used for cooling operation and heating operation.
Switch the refrigerant flow direction during operation and dehumidification operation
I can. Specifically, during cooling operation and other operations,
Four-way valve 27 for switching flow direction, first reduction during heating operation
1 to bypass the pressure device 23 and the upstream heat exchanger 18
Solenoid valve 28 bypasses second decompression device 24 during dehumidification operation
The second solenoid valve 29 and the flow direction of the refrigerant.
Check valve 30 is provided. [0016] The flow path switching means is used for cooling during the cooling operation.
Depending on the chamber operation and the dehumidifying operation, the refrigerant
Switch the flow. During the cooling operation, the refrigerant compressor 22 discharges air.
The discharged refrigerant is removed from the four-way valve 27 → the outdoor heat exchanger 21 → first reduction.
Pressure device 23 → upstream heat exchanger 18 → accumulator 2
5 → flow in the order of the refrigerant compressor 22 (see arrow C in FIG. 1). During the heating operation, the refrigerant compressor 22 discharges
The refrigerant is supplied to the four-way valve 27 → the downstream heat exchanger 19 → the second pressure reducing device.
24 → Outdoor heat exchanger 21 → First solenoid valve 28 → Accu
It flows in the order of the murator 25 and the refrigerant compressor 22 (arrows in FIG. 1).
H). During the dehumidifying operation, the cooling
The medium is supplied to the four-way valve 27 → downstream heat exchanger 19 → second solenoid valve 2
9 → outdoor heat exchanger 21 (at this time, outdoor fan 26 is off
F) → first decompression device 23 → upstream heat exchanger 18 → Accu
Flow from the compressor 25 to the refrigerant compressor 22 (see arrow in FIG. 1).
See mark D). FIG. 4 is a control device of an air conditioner for an electric vehicle.
FIG. The above-described indoor fan motor 10
Auxiliary heater 20, outdoor fan motor 261, electric motor 2
21, four-way valve 27, first and second solenoid valves 28 and 29,
Electrical parts such as an actuator (not shown) that drives the damper
The electric current of the product is controlled by the control device 31. Control device
31 is a control manually operated by a vehicle occupant
Instruction on panel 32 (see FIG. 5), discharge temperature thermistor 3
11, outdoor temperature thermistor 312, pressure sensor 313,
Energization of each electric component according to the output of the current sensor 314
The control is performed. The discharge temperature thermistor 311 is provided according to the present invention.cold
Medium pressureDetecting means for discharging the refrigerant from the refrigerant compressor 22
The temperature of the high-pressure refrigerantRefrigerant temperature sensorIt is. This
The discharge temperature thermistor 311 is, as shown in FIG.
From the refrigerant compressor 22 body, that is, the sealed case 224
Attached to the projecting conduit 225, the detected height
The temperature of the compressed refrigerant is converted into an electric resistance value and sent to the control device 31.
You. The outdoor temperature thermistor 312 is located outside the vehicle compartment of the electric vehicle.
Is to detect the temperature. The pressure sensor 313 of the present inventionRefrigerant pressureInspection
Discharge means, the high-pressure cooling medium discharged from the refrigerant compressor 22.
Detecting medium pressureRefrigerant pressure sensorIt is. This pressure cell
The sensor 313 is connected to the refrigerant compressor 22 as shown in FIG.
Attached to the discharge line 226 between the downstream heat exchanger 19
And converts the detected high-pressure refrigerant pressure into an electrical signal.
And sends it to the control device 31. The current sensor 314, DC2
Connect 00V on-board power supply 316 and inverter 223
The current value flowing through the feeder line 317 is detected.
In the figure, reference numeral 318 denotes a fuse. The control device 3
1 is a high-pressure refrigerant detected by the discharge temperature thermistor 311
Temperature reaches abnormal temperature or detected by pressure sensor 313
When the pressure of the high-pressure refrigerant reaches an abnormal pressure,
Sends a gradually decreasing frequency signal to the inverter 223,
The rotation speed of the compressor 22 is reduced to protect each air conditioner.
I am trying to do it. The control panel 32 is provided for each blow mode.
Mode setting switch 33 for setting the
Air volume setting switch to set the air volume blown into the passenger compartment
H, an inside / outside air setting switch 35 for setting inside / outside air,
Air conditioning mode setting for instructing setting and stopping of each air conditioning mode
Constant switch 36, defrosting the outdoor heat exchanger 21 during heating operation
Defrost switch 37 for instructing operation, temperature setting lever 38
And a power saving switch 39. The blow mode switch 33 is a face
Switch 33a, bi-level switch 33b, foots
Switch 33c, foot differential switch 33d and differential
Each switch is turned on when each switch is turned on.
Indicator lamps 331 to 335 are turned on. Fe
The chair switch 33a is mainly directed toward the head and chest of the vehicle occupant.
Control device to blow cold air (face mode)
An instruction switch for instructing the switch 31. Bilevel switch
H 33b blows cold air toward the head and chest of the vehicle occupant.
And blows warm air mainly toward the feet of the vehicle occupants.
Instruct control device 31 to perform (bi-level mode)
Instruction switch. The foot switch 33c is provided at the foot of the vehicle occupant.
To blow out mainly hot air toward (foot mode)
Is an instruction switch for instructing the control device 31 to operate. Foot
The differential switch 33d blows warm air toward the feet of the vehicle occupants.
As well as blowing out the windshield of electric vehicles
Blow warm air toward the inside (foot differential mode)
Instruction switch for instructing the control device 31 as described above. De
Switch 33e is provided on the windshield of the electric vehicle.
Blow warm air mainly toward the inside (diff mode)
An instruction switch for instructing the control device 31 as shown in FIG. The air volume setting switch 34 is
For setting the voltage applied to the indoor fan motor 10,
Weak mode, in which the amount of air blown into the cabin is the minimum airflow, intermediate wind
Medium mode for maximum air volume and strong mode for maximum air volume can be set
It is. In addition, in each air volume mode, each indicator
The lamps 341 to 343 are turned on. Inside / outside air setting switch
Reference numeral 35 denotes an inside air mode for designating inside air introduction, and a reference to outside air introduction.
The outside air mode to specify the inside air mode and the intermediate mode to specify the inside and outside air introduction
Set each indicator line in each mode.
The lamps 351 to 353 light up. The air conditioning mode setting switch 36 is a stop switch.
Switch 36a, blower switch 36b, cooling switch 36
c, from heating switch 36d and dehumidification switch 36e
When each setting switch is turned on, each indicator
The lamps 361 to 365 light up. Stop switch 36
a is a blowing operation mode, a cooling operation mode, a heating operation mode.
Control device 3 to stop the dehumidifying operation mode
This is an instruction switch for instructing the instruction switch 1. The blower switch 36b sucks air into the duct 2.
Blown air into the passenger compartment without cooling and heating
Instructs the control device 31 to let it go out (blowing operation mode)
Instruction switch. The cooling switch 36c is
Cooling the air sucked into the vehicle 2 to cool the vehicle interior
Finger instructing the control device 31 to
Switch. The heating switch 36d is a finger of the present invention.
Indicating means for heating the air sucked into the duct 2.
To heat the passenger compartment (heating operation mode)
An instruction switch for instructing the device 31. Dehumidification switch
36e dehumidifies and adds air sucked into the duct 2.
To dehumidify the cabin by heating (dehumidification operation mode)
An instruction switch for instructing the control device 31. The temperature setting lever 38 is moved according to the set position.
Setting of rotation speed of refrigerant compressor 22 in each air conditioning mode
Is performed to set the air conditioning capacity. Specifically
Indicates the selected air-conditioning mode and the strike of the temperature setting lever 38.
The electric motor that drives the refrigerant compressor 22 based on the stroke amount
Set the inverter frequency which is the drive frequency of the motor 221.
Set. The temperature setting lever 38 has an indicator
A lamp 381 is attached. Defrost switch 37
And also when the power saving switch 39 is turned on.
Indicator lamps 371 and 391 to be provided. [Operation of Embodiment] Next, the operation of the present invention will be described.
The operation of the embodiment, in particular, the cold air prevention control by the controller 31
This will be briefly described with reference to the flowchart of FIG. This file
The chart is turned on when the ignition switch is turned on.
Be started. First, set the initial values of various data (S
Step S1). Next, the heating switch 36d is turned on.
It is determined whether or not. That is, the heating operation mode is
It is determined whether or not it is indicated (step S2). this
If the determination result in step S2 is No, the air blowing operation mode
Mode, cooling operation mode or dehumidification operation mode
Normal control to control various electric appliances based on
(Step S3). After that, the control of step S2 is performed.
Return as follows. If the result of the determination in step S2 is Yes,
In case, the control time of the cold air prevention control in the heating operation mode
Start a control timer (not shown) that measures
(Step S4). The electric motor of the refrigerant compressor 22
Inverter set with the temperature setting lever 38
Start at the frequency, and the outdoor fan motor of the outdoor fan 26
261 and the first solenoid valve 28 are turned on, and the auxiliary heater 20 is turned on.
And the second solenoid valve 29 is turned off, and the four-way valve 27 is
Switch to the arrow H side (see FIG. 1) (step S5).
Further, the indoor fan motor 10 of the indoor fan 9 is turned off.
The indicator lamp 34 of the air volume setting switch 34
1 to 343 turn on the set indicator lamp
You. (Step S6). Next, the blowing mode is set to the face mode (FA
CE), bi-level mode (B / L) or foot mode
(FOOT) is determined. Sand
And face switch 33a, bi-level switch 33
b or the foot switch 33c is turned on
It is determined whether or not there is (step S7). This step
If the determination result of S7 is Yes, the pressure sensor 313
P of the high-pressure refrigerant detected by_DIs the set pressure P
_D1(For example, 15kgf / cm^Two) Or not
Is determined (step S8). The judgment of this step S8
If the result is Yes, the indoor fan mode of the indoor fan 9
Data 10 is turned on. That is, the air volume setting switch 34
The applied voltage according to the air volume mode set by
To the motor 10 and an indicator lamp
341-343 is turned on (step S
9). Then, the stroke amount of the temperature setting lever 38 and the warm-up
To the electric motor 221 based on the
Normal heating operation by setting the heater frequency.
(Step S10). After that, control of step S2 is performed.
Return to do. If the result of the determination in step S8 is No,
In this case, the power supply line 31 detected by the current sensor 314
7 is the set current value I₁(Eg 12A)
It is determined whether or not the number has increased (step S1).
1). When the determination result of step S11 is Yes
Performs the control of step S9. Step S11
Is No, the discharge temperature thermistor 31
1, the temperature T of the high-pressure refrigerant detected by_DIs the set temperature T_D1
(For example, 45 ° C.)
(Step S12). The result of the determination in step S12 is
In the case of Yes, the control of step S9 is performed. If the result of the determination in step S12 is No,
In the case, whether the heating switch 36d is turned on or not
Judge. That is, the heating operation mode is continued.
It is determined whether or not it is (step S13). This step
If the determination result in S13 is No, the control in step S3 is performed.
I will do it. In addition, the determination result of step S13 is Yes.
If the heating operation is measured by the control timer
The control time t of the cold air prevention control in the mode is the set time t
₁(E.g., 3 minutes)
(Step S14). The result of the determination in step S14 is
If No, the control in step S7 is performed. Also,
If the determination result of step S14 is Yes, the step
The control of S9 is performed. If the result of the determination in step S7 is No,
In this case, the indoor fan motor 10 of the indoor fan 9 is turned on.
You. That is, the value set by the air volume setting switch 34
Apply the applied voltage according to the air volume mode to the indoor fan motor 10
While the indicator lamps 341 to 343
One of them is turned on (step S15). Next, heating
It is determined whether the switch 36d is turned on. sand
That is, it is determined whether or not the heating operation mode is continued.
(Step S16). Determination result of step S16
Is No, the control of step S3 is performed. Also,
If the determination in step S16 is Yes,
Mode is face mode (FACE), bi-level mode
(B / L) or foot mode (FOOT)
To determine if That is, the face switch 33
a, bi-level switch 33b or foot switch 3
It is determined whether or not any of the switches 3c is turned on.
Step S17). If the result of the determination in step S17 is Yes
In this case, the control in step S6 is performed. Also step
If the determination result in S17 is No, the control timer
Control of cold air prevention control during heating operation mode
Your time t is the set time t₁(For example, 3 minutes)
It is determined whether or not it is (step S18). This step
If the determination result in S18 is No, the process proceeds to step S16.
Perform control. Also, the determination result of step S18 is Yes.
In the case of, the control of step S10 is performed. Therefore, the occupant of the vehicle operates the heating switch 36.
When d is pressed, the indoor fan motor 10 is
It turns off and the stop state of the indoor fan 9 is continued. This and
And deformation of duct 2 due to excessive temperature rise in duct 2
The auxiliary heater 20 also keeps the OFF state to prevent the like.
To do. Then, a temperature setting lever is supplied to the electric motor 221.
-38 to give a frequency based on the stroke amount etc.
Start the compressor 22 and start the operation of the refrigeration cycle 17
I do. Therefore, the refrigerant discharged from the refrigerant compressor 22 is shown in FIG.
As shown by arrow H, the four-way valve 27 → downstream heat exchanger
19 → second pressure reducing device 24 → outdoor heat exchanger 21 → first electromagnetic
Valve 28 → accumulator 25 → refrigerant compressor 22
Flows. The operation of the refrigeration cycle 17 is performed.
However, the stop state of the indoor fan 9 is continued as described above.
Therefore, the refrigerant exchanges heat with air in the downstream heat exchanger 19.
Does not change. Therefore, the high pressure discharged from the refrigerant compressor 22 is
The temperature and pressure of the high-temperature and high-pressure refrigerant rapidly increase.
Accordingly, the temperature of the downstream heat exchanger 19 also rises rapidly.
Going up. The transient temperature of the high-pressure refrigerant is determined by the discharge temperature
-The pressure of the high-pressure refrigerant is detected by the
Was detected by the pressure sensor 313, and a certain condition was reached.
When the indoor fan motor 10 is turned on, the indoor fan motor is turned on.
Activate fan 9. In this embodiment, the air conditioning of a vehicle occupant is
Outlet temperature blown out of the outlet with emphasis on feeling
High-pressure refrigerant required to reach a temperature of, for example, 15 ° C to 20 ° C
For example, 45 ° C. or higher, and the pressure of the high-pressure refrigerant is, for example, 15 ° C.
kgf / cm^TwoWhen the above is reached, the downstream heat exchanger 19
The air passing through the duct 2 is rapidly heated by the heat radiation
You. Therefore, the air that has passed through the downstream heat exchanger 19 is an example.
For example, the temperature rises from 15 ° C to 20 ° C.
Can be eliminated. Further, in view of the safety of the air conditioning equipment, the current sensor 31
4, the input current to the inverter 223,
A current value flowing through the electric wire 317 is a certain current value, for example, 12 A or less.
By turning on the indoor fan motor 10
Thus, the indoor fan 9 is started. In addition,
Keeping the temperature setting lever 38 in the low frequency range
When the stop control is performed, the refrigerant compressor 22 rotates at a low speed,
The temperature and pressure of the high-pressure refrigerant do not rise,
The internal fan 9 may not start. In such a case
Press the heating switch 36d at the same time as the control timer
-A set time, for example, 3 minutes, has elapsed since the operation started.
Then, even if the above conditions are not reached, the indoor fan motor
By turning on 10, the indoor fan 9 is started.
Like that. The normal blow mode is a face mode.
Mode, bi-level mode, foot mode, foot differential mode
De, differential mode is the basic, but the windshield
For safety against cloudy weather, foot differential mode and differential mode
Only in the event of a cold wind.
In addition, air conditioning mode changes from heating mode to another mode
Do not perform the cold air prevention control when
You. [Effects of Embodiment] As described above, the air conditioner 1 for an electric vehicleAt
From the refrigerant compressor 22 detected by the pressure sensor 313
Refrigerant until the pressure of the discharged high-pressure refrigerant reaches a predetermined pressure
While turning on the electric motor 221 of the compressor 22,
By turning off the indoor fan motor 10 of the blower 4
And the inside of the duct 2 is radiated by the heat radiation from the downstream heat exchanger 19.
The air sent into the vehicle cabin through is heated. By this
hand,Prevents cool air from being blown from the air outlet at the start of heating operation
Because it can be stopped, the air conditioning feeling of vehicle occupants
Can be improved.Also, the pressure sensor 313 detects
Pressure of the high-pressure refrigerant discharged from the refrigerant compressor 22
Until the pressure reaches a predetermined pressure, the indoor fan motor of the blower 4
Control to turn off 10 is set to face mode or dance
Either bell mode or foot mode
Only when it is set to
(Foot differential mode or differential mode)
Heating without waiting for the pressure of the high-pressure refrigerant to reach the predetermined pressure
The indoor fan of the blower 4 based on the switch 36d being turned on.
Since the motor 10 can be turned on,
Unnecessary delay in removing or preventing fogging
Can be avoided. [Modification] In this embodiment, the discharge temperature
The star 311 was attached to the refrigerant compressor 22 main body,
Attaching to the pipeline near the refrigerant inlet of the side heat exchanger 19
Between the refrigerant compressor 22 and the downstream heat exchanger 19
More accurate cold windbreak because there is no heat loss in the discharge pipe
It is possible to perform stop control. In addition, the outdoor temperature thermistor
The temperature of the outside air detected by the star 312 is equal to the set temperature (for example,
15 ℃) or more, the cool air prevention control
It may not be performed. Forcibly during cold air prevention control
When starting to blow air into the passenger compartment,
Because the temperature of the air blown out from the air outlet is low,
Air flow until a certain time (for example, 1 minute) elapses after startup
The minimum air volume will be reached regardless of the setting of the setting switch 34
Fixed the rotation speed of the indoor fan 9
So that the air volume is adjusted according to the setting position of the constant switch 34.
By controlling the rotation speed of the inner fan 9,
To prevent a decrease in the air conditioning feeling of vehicle occupants.
Is also possible. [0042] As described above, the present invention provides a vehicle interior using a refrigeration cycle.
Heating the vehicle,Detected by refrigerant pressure detection means
Start the refrigerant compressor until the pressure of the high-pressure refrigerant reaches the predetermined pressure.
By stopping the operation of the blower
And heat radiation from the heat exchanger through the duct
The air sent to is heated. by this,Heating operation
This prevents cold air from blowing into the cabin at the start.
To improve the air conditioning feeling of vehicle occupants
Can be.In addition, the high-pressure cooling detected by the refrigerant pressure detecting means.
A system that stops the blower until the pressure of the medium reaches a predetermined pressure
Control in face mode, bi-level mode, or
Is set to one of the blowout modes in
High pressure in other blowing modes.
Instructing means without waiting for the pressure of the refrigerant to reach a predetermined pressure.
To start the blower based on the instruction of heating the cabin by
Can remove the fogging or fogging of the window glass
To prevent unnecessary delays in prevention.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a refrigerant circuit diagram of an air conditioner for an electric vehicle according to an embodiment. FIG. 2 is a schematic configuration diagram of a duct of the embodiment. FIG. 3 is a schematic view of the vicinity of a refrigerant compressor of the embodiment. FIG. 4 is a block diagram of a control device according to the embodiment. FIG. 5 is a front view of a control panel. FIG. 6 is a flowchart showing the operation of the embodiment. [Description of Signs] 1 Electric vehicle air conditioner 2 Duct 4 Blower 10 Indoor fan motor of blower 19 Downstream heat exchanger 22 Refrigerant compressor 31 Control device (Control means) 36d Heating switch (Instruction means) 221 Refrigerant compressor Electric motor 311 discharge temperature thermistor ( refrigerant temperature sensor, refrigerant pressure
Force detection means) 313 Pressure sensor (refrigerant pressure sensor, the refrigerant pressure detecting means) 314 Current sensor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 58-126632 (JP, U) Japanese Utility Model Sho 63-188467 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F25B 1/00 351

Claims (1)

(57) [Claims] (1) (a) a duct that forms an air passage into the vehicle interior, (b) a blower that sends air into the vehicle interior through the duct, and (c) suction. Refrigerant compressor that compresses and discharges compressed refrigerant, and a heat exchanger that is disposed in the duct and heat-exchanges the refrigerant discharged from the refrigerant compressor and air sent into the vehicle interior to heat the air. (D) instruction means for instructing heating of the vehicle interior; and (e) a pressure of the high-pressure refrigerant discharged from the refrigerant compressor.
A refrigerant pressure detecting means for detecting, (f) face mode or the bi-level mode or off
Is set to any of the blowout modes
A control device for determining whether or not heating of the vehicle compartment is instructed by the instructing means, activating the refrigerant compressor, and controlling the face mode or
Is either the bi-level mode or the foot mode
If it is determined that any of the blowing modes has been set
The pressure of the high-pressure refrigerant detected by the refrigerant pressure detecting means
The operation of the blower is stopped until the pressure reaches a predetermined pressure, and when the heating of the passenger compartment is instructed by the instruction means,
The refrigerant compressor is started, and the face mode or
Is either the bi-level mode or the foot mode
An air conditioner for a vehicle, comprising: control means for activating the blower when it is determined that any of the blowout modes is not set .