JP3518551B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
In both cases, when the mode is switched to the defrost mode,
Cloudiness on the indoor side of the
Air conditioner to remove. [0002] 2. Description of the Related Art Generally, in vehicles such as automobiles,
Moisture emanating from personnel, contained in air introduced from outside
Window glazing due to humidity or the difference between the inside air temperature and the outside air temperature
Dew may adhere to the interior surface of the vehicle and cause fogging.
You. Such fogging reduces visibility ahead of the vehicle,
In particular, it is necessary to clear cloudiness as soon as possible while driving.
is there. In this case, in order to clear the fogging of the window glass,
The air blown from the defrost outlet to the window glass
Mode and the compressor of the refrigeration cycle
Turned on or set the inside / outside air mode to outside air mode
Or set the blow-off air volume to the maximum, or
Set the blowout temperature to the maximum under the condition that it is below the fixed value, etc.
There is a method. [0004] However, the above-described settings are not changed by the driver.
If you set individually, the operation becomes very troublesome
Conventionally, a separate defrost mode setting switch
To automatically set the above various conditions
This improves operability and safety.
I have. [0005] SUMMARY OF THE INVENTION
When the strike mode is set, the safety
Air flow from the defrost outlet to give priority to
Or control to maximize the blowout temperature
To clear the cloud quickly
The controlled air condition in the cabin fluctuates,
There is a defect that impairs comfort. [0006] Therefore, the comfort in the passenger compartment must not be impaired.
In order to achieve this, the driver must perform detailed
Need to control the status of the
There is a problem that is. [0007] The present invention has been made in view of the above circumstances.
The purpose is to switch to the defrost mode,
It quickly removes the fog on the indoor side of the window glass and
Even if the air condition is not
Sky that can avoid discomfort to the driver
A control device is provided. [0008] [0009] [0010] [Means for Solving the Problems]BookThe air conditioner of the invention isSky
A refrigeration cycle is provided as a means to cool and dehumidify the conditioned air.
Air conditioning the room and switching to defrost mode
In the replaced state, defrost the indoor fogging of the window glass
Air conditioner removed by airflow from the air outlet
hand,An outside air temperature detecting means for detecting an outside air temperature;
Defrost blowing, which is the temperature of the air blown from the lost outlet
Control means for controlling the outlet temperature; and
Stores the set defrost outlet temperatureAlong with
When the compressor of the refrigeration cycle is stopped
The defrost blowing temperature is
When the temperature is higher than the defrost blowing temperature at the time of operation
So that the defrost blowing temperature is storedDefloration
Strike air temperature storage means, the control means,
In the defrost mode, the defrost outlet temperature memory
From the stage, the detected temperature of the outside air temperature detecting meansAnd the con
Presser operation stop stateThe defrost blowing corresponding to
Read the temperature and blow out from the defrost outlet
Control so that the temperature becomes the readout defrost blowing temperature
Configured toIt has features in the place. [0011] [0012] [0013] [0014] [0015] [Action]Claim 1According to the described air conditioner, defrost
When the mode is switched to the mode, the control means
The defrost outlet temperature corresponding to the temperature detected from the stage
Read from the lost air temperature storage means and defrost air outlet
The blow-out temperature from the
Control so that [0016] In this case, the defrost blowing temperature depends on the window glass.
Parameter indicating the upper limit of the surface temperature on the indoor side of
Stored in advance as a value corresponding to the outside air temperature
You. In other words, when the outside air temperature is low,
Clear the fog because the surface temperature of the
Stored at a relatively high temperature to facilitate
When the air temperature is high, the surface temperature of the window glass on the indoor side is also high.
It is hard to be cloudy, so it is stored at a relatively low temperature
You. Therefore, the defrost blowing temperature for anti-fog of window glass
Degree is at the appropriate blowing temperature according to the outside air temperature at that time
It is controlled to be blown out. This allows the window glass
Clearing cloudiness quickly to ensure safety, and indoors
Indoor air-conditioning operation without greatly changing
Air conditioning control that does not impair comfort for the elderly
it can. [0017]AndWhen the compressor is stopped
At the defrost outlet temperature at which the compressor operates
So that it is equal to or higher than the defrost
The correspondence between the outside air temperature and these defrost blowing temperatures is described.
I remember. In other words, dehumidification when the compressor is stopped
Capacity loss is compensated for by increase in defrost blowing temperature
Is stored in Therefore, data for anti-fog of window glass
The frost blowing temperature depends on the outside air temperature and the comp
Blowing at the appropriate blowing temperature according to the state of the operation of the Lesa
Is controlled to be This can lead to fogging of the window glass
To ensure safety by quickly clearing
It is possible to control indoor air-conditioning
Air conditioning control that does not impair comfort
You. [0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to an air conditioner of an automobile.
One embodiment of the case will be described with reference to the drawings. FIG. 1 shows the overall functional block configuration.
In the air duct 1 arranged in the front of the vehicle compartment (not shown)
The inside / outside air switching damper 2 rotates at the upstream entrance
And a blower 3 is provided downstream thereof.
You. The inside / outside air switching damper 2 is driven by a servomotor 2a.
The air inlet is connected to the inside air inlet 4a or outside.
Switch to one of the air inlets 4b. Blower 3 is blower
It is driven to rotate by the motor 5 and is connected to the inside air inlet 4a or the outside air.
Suction air from one of the set sides of the inlet 4b
Ventilate downstream. The evaporator 6 is arranged downstream of the blower 3.
To cool the air sent by the blower 3
It is sent to the downstream side, and is a component of the refrigeration cycle 7.
It is one. The refrigeration cycle 7 is supplied from the evaporator 6
Compresor 8, condenser 9, receiver 10, and expert
Refrigerant circulates through the evaporator 6 via the option valve 11.
It is formed so as to ring, and operates the compressor 8
The cooling function by the evaporator 6 can be obtained by
it can. The air mix damper 12 is an evaporator.
6 is provided rotatably on the downstream side of the servo motor 12a.
Driven by Downstream of the air mix damper 12
The heater core 13 occupies a part of the air duct 1.
Is arranged. The heater core 13 is an engine (not shown)
Heats the air using the cooling water of
The cold air sent from the heater 6 is heated. Air mix
The damper 12 is opened by a servo motor 12a.
Depending on the degree, cool air sent from the evaporator 6 is cooled.
To the motor core 13 and the bypass passage 14. The outlet side of the air duct 1 has a defrost blow
Outlet 15, face outlet 16 and foot outlet 17
There are three outlets, corresponding to each
Defrost outlet damper 18, face outlet damper 1
9 and a foot outlet damper 20 are provided. each
The outlet dampers 18 and 20 do not have the servo motor 18a.
20a. The defrost outlet 15 is connected to the window glass 21.
It is arranged facing the surface on the vehicle interior side, and the
When the strike mode is set, the servo motor 18a
The defrost outlet damper 18 is opened, and the window
The lath 21 can be blown. The control device 22 as a control means includes a CPU
22a, a ROM 22b, a RAM 22c, and the like.
Automatic air conditioning control program for air conditioning control.
The program is stored. The ROM 22b will be described later.
Defrost air flow and defrost air temperature data
The defrost air flow amount storage means and the differential
It has a function as a lost outlet temperature storage means.
You. The output terminals A to E of the control device 22
The respective servo motors 2a, 12a, 18a, 19
a, 20a, and the output terminal F is connected via the drive circuit 5a.
And connected to the blower motor 5. Servo motor 1
2a is a step for detecting the opening degree θ of the air mix damper 12.
An Amix damper opening sensor 12b is provided,
Connected to the input terminal G of the device 22. The output terminal H of the control device 22 is
An electromagnetic clutch of the compressor 8 (shown in FIG.
Without) and connected to its electromagnetic clutch coil
By turning on the engine, the torque of the engine is transmitted and the
The dresser 8 is driven. The drive circuit 8a is provided with an electromagnetic clutch.
Has a function to detect the current flowing through the coil of the
The signal is connected to the input terminal I of the control device 22. The input terminals J to L of the control device 22 are
Inside / outside air switching switches located on an operation panel (not shown)
Switch 23, temperature setting switch 24 and defrost
Mode setting switch 25, and input terminals M to Q
Are the inside air sensor 26, the outside air sensor 27, and the water temperature sensor, respectively.
Sensor 28, solar radiation sensor 29 and evaporator sensor 3
Connected to 0. The inside air sensor 26 and the outside air sensor 27
Are the temperatures Tr and Tam inside and outside the vehicle, respectively.
The water temperature sensor 28 detects the engine cooling water temperature Tw.
The solar radiation sensor 29 detects the amount of solar radiation Ts
Is detected, and the evaporator sensor 30 detects the
The outlet temperature Te is detected. Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The control device 22 is powered on and controlled by an air conditioner.
When you start your program, the flowchart in Fig. 2
The control is performed according to. That is, the control device 22
First, an initialization process is performed in step S1,
Initialize counters, flags, etc., and proceed to step S2
You. The control device 22 determines in step S2
The set temperature Tset is read from the temperature setting switch 24, and R
Store it in the AM 22c. Subsequently, the control device 22
In step S3, various types of
Read the detection signal from the sensor. That is, the control device 22
From inside air sensor 26 to inside air temperature (room temperature) Tr, outside air sensor
27, the outside air temperature Tam, and the water temperature sensor 28
Cooling water temperature Tw, solar radiation amount Ts from solar radiation sensor 29,
The outlet temperature Te of the evaporator 6 from the porator sensor 30
Is read and stored in the RAM 22c. Next, the control device 22 proceeds to step S4.
The ROM 22b based on the read various data.
The required blowing temperature Tao is calculated by an arithmetic expression stored in advance.
Is calculated. In this case, the data is set temperature Tset
 , Inside air temperature Tr, outside air temperature Tam and solar radiation Ts.
Substituting into the arithmetic expression shown in the following equation (1)   Tao = A × Tset + B × Tr + C × Tam + D × Ts + E (1) Thus, the above-described required blowing temperature Tao is obtained (here,
Where A through E are arbitrary constants that set the gain.) Subsequently, the control device 22 proceeds to step S5.
The settings read and stored in steps S2 and S3
From various sensors that detect constant temperature Tset and environmental conditions
The blower voltage Ve is set on the basis of the detection signal. This
Blower voltage Ve sets the amount of air blown by blower 3
To the blower motor 5 through the drive circuit 5a.
Voltage. At step S6, the control device 22
ROM 2 based on various data stored in RAM 22c
2b by the arithmetic expression stored in advance in 2b
The target opening θo of the damper 12 is calculated. In this case,
The required outlet temperature Tao, cooling water temperature Tw and
Using the outlet temperature Te of the evaporator 6, the following equation (2) is used.
Substituting into an arithmetic expression,   θo = [(Tao−Te) / (Tw−Te)] × 100 (%) (2) Thereby, the target opening of the air mix damper 12 described above is obtained.
Find θo. In the following step S7, the control device 22
Is located in the air duct 1 based on the required blowing temperature Tao.
Decide whether to introduce air or outside air. this
In the case, the inside air and outside air are introduced by servoing the inside / outside air switching damper 2.
The drive is controlled by the motor 2a so that the inside air inlet 4a or the outside air inlet 4a
It is set so that one of the air introduction ports 4b is opened. The control device 22 proceeds to step S8.
The defrost mode setting switch 25 is turned on
Then, for example, if it is not turned on, "N
O ”, and the process proceeds to the step S9.
Outputs a control signal based on the result obtained in
Perform control. In this case, the control device 22 sends the blower drive signal
Signal to the drive circuit 5a to drive the blower motor 5 to the blower voltage.
Ve to drive the blower 3 at a predetermined
Drive with In addition, the control device 22 controls the air mixing
Control signal to the servo motor 12a,
Target obtained by calculating the opening degree θ of the damper 12 in step S6.
The opening degree is controlled to θo. Further, the control device 22
Outputs the inside / outside air introduction mode control signal to the servo motor 2a.
By force, the inside / outside air switching damper 2 is driven to a predetermined position. Subsequently, the control device 22 proceeds to step S
Go to 10 and wait until the predetermined control cycle τ elapses
After that, the above steps are repeated again.
You. Therefore, the control device 22 executes the above-described process at regular intervals.
Gram is repeatedly executed, thereby obtaining the set temperature Tset.
And air-conditioning control according to the
In a comfortable state. Now, the air conditioning control is performed as described above.
When the window glass 21 is exposed to dew, for example,
In the event of fogging due to wearing, defrost mode
When the mode setting switch 25 is turned on, the control device 22
When the above program is executed and step S8 is reached,
Here, "YES" is determined and the process proceeds to step S11.
Swell. That is, the control device 22 determines in step S11
Executes the defrost mode control program shown in FIG.
To run. First, the defrost mode is set
Then, the control device 22 determines in step T1 that the compressor
8 outputs either an on or off control signal.
Judge. The control device 22 is connected to the compressor 8
When outputting the control signal of
Then, the process proceeds to step T2, where the ON control signal is transmitted to the drive circuit 8a.
And the operation of the compressor 8 is started. Also,
If an ON control signal has already been output to the compressor 8
And then jump to step T3.
You. Next, in step T3, the control device 22
It is determined whether the compressor 8 is actually operating.
You. In this case, the control device 22 receives an input from the drive circuit 8a.
The current flowing through the coil of the electromagnetic clutch input to terminal I is
The operating state of the compressor 8 depends on whether it is normal or not.
to decide. This usually means that the compressor 8 is
22 receives an ON control signal via the drive circuit 8a.
Power is supplied to the coil of the electromagnetic clutch,
When the rotational force is transmitted, the operation state is established.
Insufficient or very low outside air temperature or compressor lock
Power supply to the electromagnetic clutch coil is interrupted.
This is because it stops. Accordingly, the compressor 8 is in a stopped state.
At this time, the control device 22 determines “NO” in step T3.
Judge and proceed to step T4 to set the inside / outside air introduction mode to outside.
After setting the air introduction mode, the process proceeds to step T5. on the other hand,
When the compressor 8 is operating, the control device 2
2 is “YES” in step T3, and
Go to 5. In step T4, set to the outside air introduction mode
Then, the controller 22 starts the manual inside air introduction mode.
If the mode is set, it will not be accepted and the
The setting takes precedence. Here, in step T3, the compressor 8
It is determined that the operation state is the stop state, and in step T4
The forced setting to the outside air introduction mode is performed for the following reasons.
You. That is, when the compressor 8 is stopped, the inside air introduction mode is stopped.
If the window glass is used to clear the fog,
High enough to increase the defrost blowing temperature
Must be set in this case.
And it takes too much time to become inappropriate in terms of safety.
The temperature of the occupant's head, especially, rises,
This is because it can cause discomfort. On the other hand, it is determined "YES" in step T3.
Jumps to step T4 to introduce inside and outside air
The reason why the mode is not switched is as follows. One
That is, when the compressor 8 is operating,
Dehumidification of evaporator 6 even when set to introduction mode
The air humidity in the cabin is reduced to some extent by the action.
Therefore, the time it takes to clear the fogging of the window glass 21
Is no longer the same, and in this case,
Priority on keeping the air-conditioning status of
It is. Next, in step T5, the control device 2
2 is to switch the blowing mode to the defrost mode.
Drive signals to the servo motors 18a, 19a, and 20a.
Defrost outlet damper 18, face outlet damper
19. Drive foot outlet damper 20 to blow defrost
The outlet 15 is opened and the face outlet 16 and the
The outlet 17 is set to be “closed”. At step T6, the control device 22
Defrost air volume corresponding to the defrost mode setting status
To determine. In this case, the defrost air flow rate is the outside air temperature T
The optimum value according to am is stored as the blower voltage Vd.
Read from the ROM 22b
You. The blower voltage Vd is calculated as follows.
It is determined. That is, the present inventors reduce the fogging of the window glass 21.
How high should the defrost air flow to clear
An experiment was conducted to see if the effect could be exhibited, and the results shown in Fig. 4 were obtained.
I got fruit. In FIG. 4, for example, when the outside air temperature is 20 ° C.
Check the degree of fogging of the window glass by checking the operating state of the compressor.
And the results of measurements using the air flow as a parameter.
As can be seen from this result,
It is enough to raise it up to
Fogging can be removed and more defrosting
Even if the air volume is increased, the effect will not be significantly improved.
No. Therefore, the defrost air flow rate is increased more than necessary.
It can be set properly without raising the occupant's discomfort by raising it
You can see that. And the inventors have found that such deflow
Strike air volume may vary slightly depending on the outside air temperature
It was confirmed. Based on these results, the
The blower voltage Vd for setting the defrost air flow is
It is stored and set in the ROM 22b based on the experimental results.
For example, data as shown in FIGS.
You. In this case, in FIG.
8 shows the amount of defrost air when the switch is on.
In FIG. 6, it is assumed that the compressor 8 is off.
This shows the amount of defrost air blown at the time. In the ROM 22b
Is the value of the blower voltage Vd corresponding to
Is stored in association with the outside air temperature Tam.
The device 22 is disconnected from the ROM 22b in step T6.
Reads the defrost blower voltage Vd corresponding to the air temperature Tam
It is decided. Next, the control device 22 proceeds to step T7.
Then, the blower voltage Vd determined in step T6 is stepped.
It is determined whether or not it is higher than the blower voltage Ve obtained in step S5.
Refuse. Then, the control device 22 determines that Vd> Ve.
At step T8, the process proceeds to step T8, and
The lower voltage Vd is set as a final value, and when Vd ≦ Ve
When there is, the determination is “NO” and the process proceeds to step T9.
To set the blower voltage Ve as a final value. In a normal case, a defrosting machine is used.
The airflow in the vehicle compartment is
Because it is larger than the air flow when performing
The blower voltage Vd at the step
The value is larger than the blower voltage Ve in the adjustment mode. Follow
Therefore, the control device 22 determines “YES” in the step T7.
Then, the process proceeds to step T8. However, for example, when the vehicle interior is in a low temperature state,
Immediately after starting the air conditioning operation to heat up,
In order to rapidly increase the temperature inside the vehicle, step S5
The set value of the blower voltage Ve at step T6
Higher than blower voltage Vd in defrost mode
May be done. And in such special cases
The control device 22 determines “NO” in the step T7.
Then, the process proceeds to step T9. In this case,
Blower voltage Ve is set with priority given to air conditioning control
However, in this way, the comfort in the cabin is not impaired
If there is, the defrost function
Performs its function well because it is set to increase
Will be. Next, the control device 22 proceeds to step T10.
When it comes to the defrost mode corresponding to the defrost mode setting state
The outlet temperature Taod is determined. In this case, defrost blowing
The output temperature Taod stores an optimum value according to the outside air temperature Tam.
Read from the ROM 22b
I have. In this case, the defrost blowing temperature Taod is
It is set as follows. That is, the inventors have proposed a window guard.
Defrost blowing temperature Tao for clearing the cloud of Las 21
to see how much d can be achieved
And obtained the results as shown in FIG. In FIG. 7, for example,
Defrosting the window glass 21 with a constant defrost airflow
The results of the measurement of the degree of
are doing. As can be seen from this result, defrost blowing
It is enough to raise the temperature Taod to a certain extent.
It is possible to remove fogging relatively quickly, and
Even if the defrost blowing temperature is raised further, the effect is remarkable
It does not improve. Therefore, the defrost blowing temperature Taod is required.
It can be set appropriately without increasing the
It can be understood that it does not cause the discomfort of the members. Soshi
Thus, the inventors have determined such a defrost blowing temperature Taod.
However, it is confirmed that there is a slight difference corresponding to the outside air temperature Tam
did. From these results, the data corresponding to the outside air temperature Tam
The frost blowing temperature Taod is set and recorded in the ROM 22b.
For example, as data shown in FIG.
I have. In this case, in FIG.
8 shows the defrost blowing temperature Taod according to the on / off of
ing. As described above, the defrost blown into the ROM 22b
Since the temperature Taod is stored, the control device 22
At step T7, the external temperature Tam is changed from the ROM 22b.
Read and determine the corresponding defrost outlet temperature Taod
You. Next, the control device 22 proceeds to step T11.
Then, the defrost blowing temperature determined in step T10
Taod is higher than the required outlet temperature Tao obtained in step S4.
It is determined whether it is large. Then, the control device 22 determines T
If aod> To, then “YES” is determined and the
The process proceeds to Step T12, and the defrost blowing temperature Taod is finally set.
If Taod ≤ Tao, "N
O ”, and the process proceeds to step T13, where the required blowing temperature is determined.
Set Tao as the final value. In a normal case, a defrosting machine is used.
The defrost blowing temperature Taod when performing Noh is
Greater than the required outlet temperature Tao for air conditioning
It becomes. Therefore, the control device 22 determines in step T11
To determine “YES” and proceed to step T12
Has become. However, for example, when the vehicle interior is in a low temperature state,
Immediately after starting the air conditioning operation to heat up,
In order to rapidly increase the temperature inside the vehicle, step S4
Setting value of the required outlet temperature Tao in step T10
Is set higher than the defrost blowing temperature Taod
Sometimes. And in such special cases,
The control device 22 determines “NO” in step T11 and
The process moves to step T13. In this case,
The required outlet temperature Tao is set with priority given to air conditioning control
However, in this way, the comfort in the cabin is not impaired
If there is, the defrost function
Since Taod is set to increase, its function is sufficient.
Will be fulfilled. The control device 22 operates as described above.
When step T12 or T13 is completed, this program
To return to the main program (see Fig. 2)
Then, the above-described control contents are executed in step S9, and
After step S10, the process returns to step S2, and the following steps
The steps will be repeated. This allows
When the fogging on the interior side of the window glass 21 is promptly removed,
However, even in this case, the air conditioning condition in
Disappears. Therefore, comfort for passengers is impaired.
The defrost mode can be performed without the need. According to the present embodiment, the following:
The effect is obtained. That is, first, the defrost airflow rate is
The corresponding blower voltage Vd is stored and set in the ROM 22b,
When the defrost mode is set, the control device 22
The blower voltage Vd corresponding to the outside air temperature Tam.
Since the nozzle 3 is driven, the defrost air outlet 15
Blows out from the window with an appropriate air flow to quickly fog the window glass 21
Removes quickly and still discomforts the occupants
No more. Second, the defrost blowing temperature Taod is set to RO
M22b is stored and set, and the defrost mode is set.
Then, the controller 22 controls the data corresponding to the outside air temperature Tam.
Defrost outlet 1 by setting the frost outlet temperature Taod
5 to quickly remove the fogging of the window glass 21,
Even in this case, there is no discomfort to the occupants
Become. Third, the compressor 8 performs the above control.
For both when it is running and when it is stopped
In response, the defrost air flow and the defrost
Stored in the OM 22b,
The optimal defrost function is executed according to the operating state of the
Dehumidification by stopping the compressor 8
If there is a decrease in performance, defrost
Increase the air flow and defrost blow temperature to increase defrost
Function can be executed. In the above embodiment, the defrost model
If the air conditioning control status is special in the
Blower voltage Ve set at the start of air conditioning, etc.
The value of the required blowing temperature Tao is different from the differential in the defrost mode.
Blower voltage Vd corresponding to lost air flow and defrost
Steps are to be taken if the air temperature is higher than Tad.
Steps T7, T8, T9 and steps T11, T12,
T13 is provided, but these steps are necessary
It may be provided according to. Also, the defrost mode setting
Not in the program, but in the air conditioning control program,
Such special cases are determined in advance in the air conditioning control program.
And "YE" in steps T7 and T11.
Defrosting when it is judged as "S"
The configuration may be such that the mode can be set. Further, in the above embodiment, the present invention
Explains the case of application to an air-mix type air conditioner.
As described above, the present invention is not limited to this.
Reheat type air conditioning that regulates the blowing temperature by the flow rate of hot water
You may apply to an apparatus. In the above embodiment, the frozen size
The control of the wheel 7 is performed by the on / off control of the compressor 8.
However, the present invention is not limited to this.
Use a variable displacement compressor, or use an evaporation pressure control valve
The present invention may be applied to an (EPR) refrigeration cycle. In addition, in the above embodiment, the compression
Set the defrost blowing temperature according to the on / off state of the heater 8
However, it is not limited to this,
As a configuration for setting the lost blowout temperature, the ROM 22b
The memory capacity may be reduced. Now, in the above embodiment, the defrost
In the mode, the opening degree θ of the air mix damper 12 is controlled.
The target opening θo calculated in step S6 was set,
However, for example, the calculated target opening degree θo is
By adding θα, the defrost blowing temperature is changed to the outside air temperature.
It can also be set according to the degree. That is, in this case, for example,
The air conditioning characteristics using the damper 12 generally have non-linearity.
Therefore, when the compressor 8 is off,
On the high temperature side, the opening degree θ of the air mix damper 12 is
The outlet temperature varies greatly (in the range of the engine water temperature).
), The air mix damper 12
The change in the outlet temperature with respect to the opening degree θ becomes smaller. On the other hand, when the compressor 8 is on
, The blowout temperature is low due to the operation of the refrigeration cycle 7.
You can compensate for it. FIG. 9 shows the temperature in this case.
It shows the degree change, usually as shown by the solid line in the figure,
When the compressor 8 is operated, the blow-out temperature drops temporarily.
I will do it. This is the response of the evaporator sensor 30.
Due to a response delay, an operation delay of the air mix damper 12, etc.
And this period lasts, for example, for 40 to 60 seconds.
Is controlled to return to the blowout temperature. In consideration of such a temperature decrease,
The target opening θo of the air mix damper 12 must be set to θα in advance.
By adding and setting, as shown by the broken line in the figure,
It can be controlled so as to eliminate fluctuations in the output temperature. In this case, generally, the occupant operates the window glass 21.
When the cloudiness reaches about 30 to 60%, the defrost mode
In order to turn on the mode setting switch 25, for example,
During the period when the blowing temperature is maintained for 0 to 60 seconds,
The cloudiness of Lass 21 is almost clear,
Clear cloudiness quickly without compromising interior comfort
It can be. [0073] As described above, the air conditioner of the present invention
According to this, the following excellent effects can be obtained. That is, billing
According to the air conditioner described in Item 1, the differential is adjusted in accordance with the outside air temperature.
lostOutlet temperatureDefrost in storage means in advanceOutlet temperatureWrite
Remember, the defrost corresponding to the outside air temperature by the control meansSquirting
Outgoing temperatureReadTo reach that temperatureDefrost blowing
Since air is blown from the mouth, defrost mode is enabled.
Sensor that detects the surface temperature of window glass even when applying
Without providing a separateOutlet temperatureWith proper settings
Therefore, while quickly removing the fogging of the window glass, and
Without compromising comfort for indoor air-conditioning drivers.
You. [0074] [0075] [0076]AndWhen the compressor is off
The compressor operates when the defrost air outlet temperature at
So that it is equal to or higher than the defrost
The correspondence between the outside air temperature and these defrost blowing temperatures is described.
Remember, this allows dehumidification when the compressor is stopped.
Compensate for the decrease in capacity by increasing the defrost blowing temperature.
Defrost blowing temperature to prevent fogging of window glass
Indicates the temperature of the outside air at that time and
Control to blow at the appropriate blow temperature according to the condition
Window glass to quickly clear the fog and ensure safety.
And without significantly changing the indoor air-conditioning condition,
Air-conditioning control that does not impair comfort for indoor air-conditioning drivers
Can do it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block diagram showing an embodiment of the present invention. FIG. 2 is a flowchart of an air conditioning control program. FIG. 3 is a flowchart of a defrost mode setting program. Experimental results of the degree of fogging of the window glass [Fig. 5] Set value of defrost air flow when compressor is on [Fig. 6] Fig. 5 equivalent to Fig. 5 when compressor is off [Fig. 7] Fig. 4 equivalent to defrost blowing temperature [Fig. Defrost blowout temperature set value [FIG. 9] Time transition of defrost blowout temperature showing another embodiment [Explanation of symbols] 1 is an air duct, 2 is an inside / outside air switching damper, 3 is a blower,
5 is a blower motor, 6 is an evaporator, 7 is a refrigeration cycle, 8 is a compressor, 12 is an air mix damper, 1
2b is an air mix damper opening sensor, 13 is a heater core, 15 is a defrost outlet, 18 is a defrost outlet damper, 21 is a window glass, 22 is a control device (control means), 22a is a CPU, 22b is a ROM (defrost feeder). Air volume storage means, defrost outlet temperature storage means), 25 is a defrost mode setting switch, and 27 is an outside air sensor (outside air temperature detection means).

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Honda 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Within Denso Corporation (72) Inventor Katsuhiko Samugawa 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Denso Corporation (72) Inventor Sugi Hikari 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-61-184117 (JP, A) JP-A-58-61016 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/00 101 B60H 1/00 103

Claims (1)

(57) [Claims 1] Refrigeration as means for cooling and dehumidifying conditioned air
An air conditioner that includes a cycle and performs air conditioning in the room, and removes fogging on the indoor side of the window glass by blowing air from the defrost outlet when the mode is switched to the defrost mode, and an outside air temperature detecting means for detecting an outside air temperature. and control means for controlling the defrost temperature is air temperature of air blown from the defrost outlet, the defrost which is set in advance corresponding to the outside air temperature
In addition to storing the temperature ,
The defrost blowing temperature when the air is stopped
Is the differential when the compressor operates.
The defrost blowing temperature is set to be equal to or higher than the lost blowing temperature.
And a defrost blowout temperature storage means storing a temperature.The control means corresponds to the detected temperature of the outside air temperature detection means and the operation stop state of the compressor from the defrost blowout temperature storage means in the defrost mode. The defrost outlet temperature is read, and the outlet temperature from the defrost outlet is read by the defrost outlet.
An air conditioner characterized by controlling the temperature .