JPH0214963Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioner for an automobile that can be controlled according to the weather outside the vehicle. (Prior art) A general automobile air conditioner includes an intake unit that takes in air from inside and outside the vehicle, a cooler unit that uses an evaporator to cool the air taken in by the intake unit, and an air conditioner that cools the air once it has been cooled by the cooler unit. It has a heater unit that selectively guides the air to the heater, heats it, adjusts the temperature, and then blows out air into the passenger compartment from various air outlets.
-48501).

The operation of such an air conditioner for an automobile is performed using various operating levers on a control panel in front of the driver's seat. For example, in rainy weather, turn on the air conditioner switch in the control panel,
Air conditioning is performed while dehumidifying the air in a vehicle interior, and a part of the conditioned air is blown out along the inner surface of the windshield to prevent fogging on the inner surface of the windshield. In addition, on sunny days, by operating the mode lever in the control panel, cold air is blown towards the upper body of the occupant, and warm air is blown towards the occupant's feet. You can get air conditioning.

(Problem that the invention aims to solve) However, with such an air conditioner for a car, if the occupants are not familiar with the air conditioner, it is difficult to turn on the air conditioner switch in the control panel during rainy weather. The driver did not think to dehumidify the interior of the vehicle, causing fog to form on the inner surface of the windshield, and there was a risk that the driver would drive while wiping the inner surface of the windshield. In addition, on sunny days, the driver did not realize that heating for so-called head-occupied foot fever was comfortable, and there was a risk that he would not be able to fully utilize the air conditioner for his vehicle.

The present invention was developed in view of these circumstances, and its purpose is to enable even passengers who are not accustomed to using automotive air conditioners to easily obtain comfortable automotive air conditioning according to the weather outside the vehicle. .

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an intake unit that takes in air from inside and outside the vehicle interior, and a system in which refrigerant from the cooling cycle circulates through the air taken in by the intake unit. It has a cooler unit that is cooled by an evaporator, and a heater unit that selectively guides the air that has passed through the cooler unit to a heater core, adjusts the temperature, and blows it out into the passenger compartment from various outlets. A differential duct outlet that blows air along the passenger's feet, a foot duct outlet that blows air toward the occupant's feet, and a vent duct outlet that blows air toward the upper body of the occupant. In the automotive air conditioner having an upper and lower temperature difference switching door that switches the temperature difference between the air blown out from the air outlet and the def duct air outlet or the vent duct air outlet, the air conditioner is operated. The control panel is equipped with various weather switches that are turned on or off depending on the weather outside the vehicle, and the on/off of the various weather switches controls the opening and closing of the above-mentioned upper and lower temperature differential switching doors, as well as the compressor that sends refrigerant to the evaporator. It is characterized by controlling the drive.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall schematic diagram of an air conditioner for an automobile according to the present invention, FIG. 2 is a sectional view taken along the - line shown in FIG. 1, and FIG. 3 is an air conditioner for an automobile according to the present embodiment. FIG. 3 is a front view of a control panel that operates the control of the device.

As shown in FIGS. 1 and 2 (cross-sectional view taken along the - line in FIG. 1), the automotive air conditioner according to this embodiment includes an intake unit 1 and a cooler unit 2.
and a heater unit 3. The intake unit 1 has a built-in fan 5 driven by a motor 4, and is further provided with an inside air inlet 6 through which a circulating flow into the vehicle interior flows and an outside air intake 7 through which outside air flows. Also, inside the intake unit 1,
An intake door 8 that opens and closes between a position A where the inside air inlet 6 is closed and a position B where the outside air intake 7 is closed is installed.

The cooler unit 2 into which air from the intake unit 1 flows has a refrigerant conduit 9 for the cooling cycle.
An evaporator 11 is built into the evaporator 11, into which refrigerant flows through an expansion valve 10 after being depressurized. The evaporator 11 exchanges heat between the air introduced from the intake unit and the refrigerant. A heater core 12 is built into the heater unit 3, into which engine cooling water flows through a valve (not shown) in order to heat the incoming air. A mix door 13 is installed to adjust the ratio between the amount of air and the amount of air passing through the bypass passage 24 that guides the air that has bypassed the heater core 12. The mixer door 13 can be placed in the open position (C position), the closed position (D position), or any intermediate position between these positions.
For example, by operating the heater unit 3 in the E position, all the air that has flowed into the heater unit 3 is sent into the vehicle interior through the heater core 12, the heater core 12 is bypassed and a part of the air is sent into the vehicle interior, or a part of the air is sent through the heater core 12. Other air is passed through the bypass passage 24 and then mixed and sent into the vehicle interior, or is sent into the vehicle interior from several outlets without being mixed.

A mixing chamber 14 is formed on the downstream side of the heater core 12, and the mixing chamber 14 includes a differential duct air outlet 15 that leads air from the heater unit and blows it out along the inner surface of the windshield, and a differential air outlet 15 that blows air out from the heater unit along the inner surface of the windshield. A foot duct outlet 16 for blowing out air and a vent duct outlet 18 for blowing air toward the upper body of the occupant from a vent opening provided in the instrument panel in front of the driver's seat are open. Also, a differential door 19 that controls the air distribution of the air outlet 15 for the def duct, a vent door 20 that controls air distribution of the air outlet 18 for the vent duct, and a foot door 21 that controls the air distribution of the air outlet 16 for the foot duct are installed in the heater unit 3. installed.

Also, inside the heater unit 3, there is a heater core 1.
A hot air guide path 23 is formed which has a hot air inlet 25 on the downstream side of 2 and has a hot air outlet 26 near the def duct outlet 15. The warm air blowing port 25
A vertical temperature difference switching door 27 for opening and closing the door is rotatably attached to the door.

A control panel 28 for controlling such an air conditioner for an automobile is shown in FIG. This control panel 28 is mounted in the instrument panel in front of the driver's seat. The intake lever 29 shown in FIG. 3 is connected to the intake door 8 shown in FIG. 1 via an operating force transmission cable, a link, etc., and is adapted to control rotation of the intake door 8. Further, the temperature control lever 30 in the control panel 28 is similarly connected to the mix door 13 via an operating force transmission cable, a link, etc. Further, the mode lever 31 is similarly connected to various ventilation doors 19, 20, 21 via operating force transmission cables, links, and the like. Further, the fan switch 32 controls the rotation speed of the fan 5. Furthermore, the air conditioner switch 33 controls the operation and stop of a compressor 34 that operates the cooling cycle.

In particular, in this embodiment, the control panel 2
8 is equipped with various weather switches 35, 36, and 37. Among these weather switches, the clear weather switch 35 is a switch to be pressed when the weather is sunny, the cloudy weather switch 36 is a switch to be pressed when the weather is cloudy or at night, and the rainy weather switch 37 is a switch to be pressed when the weather is rainy or snowy. It's a switch.
And these weather switches 35, 36, 37
are the normally closed switches 35a and 3 shown in FIG.
6a and the normally open switch 37a. Normally closed switches 35a, 36a and normally closed switch 37
a is connected in series to turn on/off the relay switch 38.
I'm starting to take off time. Relay switch 3
8 is connected from a power source 39 to an electromagnetic clutch 40 that turns on and off the operation of the compressor 34 in parallel with the air conditioner switch 33.

Further, the weather switches 35, 36, 37 are
They are connected to a driving means 41 of an upper and lower temperature differential switching door 27 attached to the hot air suction port 25 of the hot air guide path 23 through normally closed switches 35a, 36a and normally open switch 37a, respectively. This driving means 41
Examples include negative pressure actuators.

Next, the operation of such an air conditioner for an automobile will be explained.

When the weather is clear and the passenger presses the clear weather switch 35 in the control panel, the normally closed switch 3
5a is disconnected, and in that state, the relay switch 38 does not operate. Therefore, the compressor 34 in which the refrigerant in the cooling cycle is circulated
does not operate unless the air conditioner switch 33 is activated. When the fair weather switch 35 is pressed, the driving means 41 rotates the upper and lower temperature difference switching door 27 to close the hot air intake port 25. Therefore, a part of the hot air that has passed through the heater core 12 and has been superheated is not blown out to the vicinity of the def duct outlet 15, so the mixer door 13 is
When the heater core 12 is rotated to the position and set to the differential foot mode (DEF/FOOT),
The warm air that has passed through and has been heated is mainly blown out into the vehicle interior through the foot duct outlet 16, and the cold air that has bypassed the heater core 12 is blown out into the vehicle interior through the differential duct outlet 15. As the temperature difference between the air blown out from the air outlet 16 and the foot duct air outlet 16 increases, wind that is colder than the feet of the occupants who are exposed to sunlight is sent to the occupants, making it possible to prevent the so-called cold head and feet from heating up. Heating is provided.

Further, when the weather is cloudy or at night, if the passenger presses the cloudy weather switch 36 in the control panel, the relay switch 38 will not operate for the same reason as described above. Therefore, compressor 3
4 does not operate unless the air conditioner switch 33 is turned on. In this case, the driving means 41 is operated by the cloudy weather switch 35, and the upper and lower temperature difference switching door 2
7 rotates to open the suction port 25 of the hot air guide path 23. Therefore, when the mixer door 13 is turned to the E position and the differential foot mode is set,
A part of the warm air heated by passing through the heater core 12 is blown out near the differential duct outlet 15, and is blown out near the differential duct outlet 15 and the foot duct outlet 1.
By reducing the difference in temperature between the air blown out from the 6 and 6, air at almost the same temperature as the feet is blown to the upper body of the occupant, which is not exposed to sunlight, making it suitable for cloudy days. Provides comfortable heating.

Furthermore, when the weather is rainy or snowy and the passenger presses the rainy weather switch 37 in the control panel 28, the normally open switch 37a shown in FIG. The electromagnetic clutch 40 is energized to drive the compressor 34 and feed refrigerant to the evaporator 11. Therefore, the air taken in by the intake unit is always cooled by the evaporator 11 and dehumidified at the same time, ensuring that the interior of the vehicle is dry and that dew does not adhere to the windshield and cause fogging on the windshield. It can be prevented. Further, in this case, by pressing the rain switch 37, the driving means 41 is operated to rotate the upper and lower temperature difference switching door 27 and open the hot air intake port 25. Therefore, when the mixer door 13 is rotated to the E position and set to the differential foot mode, a portion of the warm air that has passed through the heater core 12 and is heated is blown out to the vicinity of the differential duct outlet 15. By reducing the temperature difference between the air blown out from the outlet 15 and the foot duct outlet 16, the upper body of the occupant, which is not exposed to sunlight, is blown at a temperature that is almost the same as that at the feet. Provides comfortable heating suitable for cloudy days.

In addition, in the above-mentioned embodiment, the hot air guide path 23 was formed to blow out a part of the warm air heated by the heater core 12 to the vicinity of the defer duct outlet 15, but the present invention is not limited to this in any way. For example, some of the warm air is sent to the vent duct outlet 18.
A hot air guide path may be formed to blow out the hot air to the vicinity. In this case, bi-level mode (B/L)
When set to 1, it is possible to realize wind distribution conditions according to the weather.

Furthermore, as shown in FIG.
The driving means 41 that opens and closes the upper and lower temperature difference switching door 27 that opens and closes the passage a may be controlled in the same manner as in the above embodiment. This case also has the same effect as the embodiment described above.

(Effects of the invention) As described above, according to the invention, there is an intake unit that takes in air from inside and outside the vehicle interior, and a cooler unit that cools the air taken in by the intake unit with an evaporator in which refrigerant from the cooling cycle circulates. and a heater unit that selectively guides the air that has passed through the cooler unit to a heater core, adjusts its temperature, and blows it out into the vehicle interior from various air outlets, and the air outlet serves as the air outlet to blow air along the inner surface of the windshield. A differential air outlet, a foot duct air outlet that blows air toward the vicinity of the occupant's feet, and a vent duct air outlet that blows air toward the upper body of the occupant are provided, and the foot duct air outlet and the differential air outlet are provided. In the automotive air conditioner having an upper and lower temperature difference switching door that switches the temperature difference of the air blown out from the air outlet or the vent duct outlet, a control panel for operating the control of the automotive air conditioner includes: Various weather switches are installed that are turned on depending on the weather outside the vehicle, and by turning on and off the various weather switches, the above-mentioned upper and lower temperature difference switching door is controlled to open and close, and the drive of a compressor that feeds refrigerant to the above-mentioned evaporator is controlled. Therefore, even a passenger who is not accustomed to using an automobile air conditioner can easily realize comfortable automobile air conditioning according to the weather outside the vehicle.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic diagram of an air conditioner for an automobile according to the present invention, Fig. 2 is a sectional view taken along the - line shown in Fig. 1, and Fig. 3 is a diagram showing the control of the air conditioner for an automobile according to the present invention. FIG. 4, which is a front view of the control panel to be operated, is an overall schematic diagram of an air conditioner for an automobile according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Intake unit, 2... Cooler unit, 3... Heater unit, 11... Evaporator, 12... Heater core, 13... Mix door, 15... Air outlet for differential duct, 16... Air outlet for foot duct, 18 ...Vent duct outlet, 23...Hot air guide path, 23a...Cold air guide path, 25...Hot air suction port, 27...Upper and lower temperature difference switching door, 28...Control panel, 33... ...Air conditioner switch, 34...Compressor, 35...
...Sunny weather switch, 36...Cloudy weather switch, 37...
...Rain weather switch.

Claims (1)

[Scope of utility model registration request] Select the intake unit 1 that takes in air from inside and outside the vehicle interior, the cooler unit that cools the air taken in by the intake unit 1 with an evaporator 11 in which refrigerant from the cooling cycle circulates, and the air that has passed through the cooler unit 2. The heater unit 3 has a heater unit 3 that guides the air to the heater core 12, adjusts the temperature, and blows air into the vehicle interior from various air outlets.The air outlets include a differential duct air outlet 15 that blows air along the inner surface of the windshield, Foot duct outlet 16 that blows air toward the vicinity of the feet
and a vent duct outlet 18 that blows air toward the upper body of the passenger, the foot duct outlet 16 and the differential duct outlet 15.
Alternatively, in an automobile air conditioner having an upper and lower temperature difference switching door 27 that switches the temperature difference between the air blown out from the vent duct outlet 18, a control panel 28 that operates the control of the automobile air conditioner includes: Various weather switches 35, 36, 37 that are turned on depending on the weather outside the vehicle.
Attach the various weather switches 35, 36, 3.
The above-mentioned upper and lower temperature difference switching door 27 is turned on and off by turning on and off 7.
An air conditioner for an automobile characterized in that it controls the opening and closing of the compressor 34 and also controls the driving of a compressor 34 that feeds refrigerant to the evaporator 11.