JPS60166513A - Air conditioner for car - Google Patents

Abstract

PURPOSE:To exceedingly reduce the installation space in a car interior by compactly installing an air-conditioner unit for car interior inside a meter panel in the center part in car interior, thus obviating the necessity of the installation space in the lower part of the meter panel on an assistant driver's seat side. CONSTITUTION:A wind passage 5 for the air which passes through a heater core 3 and a wind passage 6 for the air which passes through an evaporator 4 are arranged in parallel in an air-conditioner case 2, and the heater core 3 and the evaporator 4 are arranged, crossing at right angles, into the case 2. A damper 7 for adjusting the inflow of the air into the above-described both wind passages 5 and 6 is installed into the space interposed between the heater core 3 and the evaporator 4, and a blower 9 is arranged into the space 8, in direct connection, and an air conditioning unit is constituted. Through the arrangement of said unit in the vicinity of the center part inside a meter panel in a car interior, the space inside the meter panel on an assistant driver's seat side which is occupied in almost all the parts by a cooling unit in the former can be effectively utilized for the space for the installation of the equipment for car.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an automotive air conditioner, and particularly to a vehicle interior air conditioner that includes an evaporator, which is a component of a refrigerating cycle, and a heater core that uses engine cooling water. Regarding the structure of the unit.

(Prior technology) Conventional automotive air conditioners usually have a blower and a cooling unit with a built-in evaporator inside the instrument panel on the passenger side of the vehicle, and a heater core inside the instrument panel near the center of the vehicle. A heater unit is installed, and a portion of the cold air cooled by the evaporator is reheated by the heater core (2) to become warm air, and this warm air and the cold air that does not pass through the heater core are heated inside the heater unit. Temperature control is performed by mixing in an air mixing chamber to achieve an appropriate temperature. In this conventional structure, the air conditioner occupies most of the space from the center of the instrument panel to the passenger seat side, which creates a problem in that the storage space for various other devices is significantly obstructed. was there. In particular, recently there has been a tendency for more and more devices to be stored around the instrument panel.
There is a strong demand for solutions to the above problems.

(Object of the Invention) In view of the above-mentioned points, the present invention enables the vehicle interior air conditioner Unino I to be compactly stored inside the instrument panel in the center of the vehicle interior, thereby eliminating the need for installation space at the bottom of the instrument panel on the passenger seat side. ,
An object of the present invention is to provide an air conditioner for an automobile that can significantly reduce installation space inside a vehicle.

(Example) The present invention will be described in detail below with reference to embodiments shown in the drawings.

(3) In Figures 1 and 2, an air conditioning case 2 is provided near the center inside the vehicle instrument panel 1, and a heater core 3 whose heat source is engine cooling water is located in the lower part of this case 2. is placed almost horizontally. Further, an evaporator 4 of a refrigeration cycle is installed in an almost vertical position in the upper part of the case 2. Therefore, the heater core 3 and the evaporator 4 are arranged approximately perpendicularly within the case 2, and the ventilation passage 5 of the three heater cores and the evaporator 4
The side ventilation passages 6 are arranged in parallel. This two-way wind route 5
．． 6, that is, the heater core 3 and the evaporator 4
A temperature control damper 7 is installed in the space 8 sandwiched between the two, and the damper 7 makes it possible to arbitrarily adjust the ratio of air flowing into the two-way air passages 5 and 6.

A blower 9 using a sirocco fan is disposed at the vehicle front side of the case 2 and at an intermediate position between the heater core 3 and the evaporator 4, and this blower 9 is directly connected to the space 8. This blower 9 is driven by a motor 10, and (4) the blown air immediately flows into the space 8. An inside/outside air switching box 11 is integrally provided on the air intake side of the blower 9. Inside this inside/outside air switching box 11, an inside/outside air switching damper 12 is installed. The inside air intake port 14 is selectively opened and closed. The outside air intake port 13 is connected to the vehicle cowl portion 15
[71L, inside air intake 1] 14 is opened in the instrument panel 1 11
It's happening. Inside/outside air switching box 1 and the casing 9a of the blower 9 are integrally molded with the case 2 from resin. The case 2 has a structure in which split cases are divided into two in the vertical direction at the center and are joined together.

The dash panel 16 partitions the vehicle compartment 17 and the engine compartment 18, and is connected to the heater core 3 and the blower 9.
is close to the dash panel 16, and the hot water pipe 19 of the heater core 3 penetrates the dash panel 16 and extends into the engine room 18. In addition, 20 is the bonnet,
21 is a front window glass.

(5) On the Suita side of the evaporator 4, an air outlet 22 is opened at the upper part of the case 2, and at the lower part of the case 2 on the air outlet side of the heater core 3, there is a foot air outlet. 23,
24, a rear heater outlet 25, and a defroster outlet 26 are open. Also, a communication passage 2 is provided to connect the outlet side of the evaporator 4 and the outlet side of the heater core 3.
7 is provided, and one end side of this communication passage 27 and the defroster outlet 26 are always in communication with the outlet side of the heater core 3. On the other hand, the other end side of the communication passage 27 and the vent outlet 2
2 is opened and closed by a damper 28, and the foot air outlet 23
．． '24 and the rear heater outlet 25 are opened and closed by a damper 29. A defroster duct 30 is connected to the defroster outlet 26 so as to blow out air toward the front window glass 21. Further, an upper blowout grille 32 is connected to the vent outlet 22 via a duct 31, and a plurality of blowout grilles 32 are arranged at the upper part of the front of the instrument panel 1 so as to blow air toward the upper body of the occupant. There are places set up. As shown in FIG. 1, the air conditioning unit A, which includes each of the devices (6) in the case 2, the blower 9, etc., is installed near the center inside the autopsy panel 1 inside the vehicle interior.

In addition, since evaporator No. 4 and No. 1 are often retrofitted on the market after a car is sold, an opening for insertion of the evaporator 4 (shown in the figure) is provided on the side of the air conditioning case 2, and the evaporator can be inserted from this opening. 4 can be retrofitted.

Also, an air conditioning control panel 33 is installed near the driver's seat on the front side of the instrument panel. ). This panel 33 is provided with the following operation parts. That is, 34 is a compressor operation switch operation knob for the refrigeration cycle, 35 is an operation lever for the motor speed control switch of the blower 9, and 36 is an operation lever for setting the blower motor, which is connected to an appropriate link mechanism and controller 1.
The dampers 28 and 29 are connected via wires or the like.

Reference numeral 37 denotes a temperature adjustment operation lever, to which the temperature adjustment damper 7 is connected via a suitable link mechanism, control wire, etc. An operating piece of a variable resistor 38 shown in FIG. 3 is also connected to this lever 37(7). Reference numeral 39 denotes an operating lever for switching between inside and outside air, which is connected to the inside/outside air switching damper 12 via a suitable link mechanism, control wire, etc.

In FIG. 3, a temperature sensor 40 connected in series to the variable resistor 38 is composed of a thermistor, and is used to detect salinity related to the degree of cooling of the evaporator, such as Suita air temperature and fin temperature of the evaporator 4. .

The control 1 circuit 41 includes the variable resistor 38 and the temperature sensor 40.
The switch 42 is opened and closed by comparing the change in the potential at the connection point A with the reference potential. This switch 42 is connected in series to an electromagnetic clutch 43, which connects and connects the vehicle engine and the compressor 44 of the refrigerating cycle. The compressor 44 constitutes a well-known air conditioning refrigeration cycle together with a condenser 45, a receiver 46, a pressure reducing device 47 such as an expansion valve, and the above-mentioned evaporator 4.

48 is a compressor operation switch (8) generally referred to as an air conditioner switch, which is operated by the aforementioned operation knob 34. Reference numeral 49 denotes a blower control switch, which is operated by the aforementioned operating lever 35. 50 Vehicle engine key switch, 5] is an in-vehicle accessory. In this example, the blower control switch 49 turns the movable piece 49a OFF, 1.0. M
It is configured to be operated in four positions e and Hi, and it switches the speed of the blower upper and lower parts 1o, and also operates the electromagnetic clutch 4.
The energizing circuit No. 3 is turned on and off.

Next, the operation of this embodiment will be explained with reference to the bottom of the -F section.

The operation will be explained for each blowout mode.

fit cooling ventilation (VENT) mode blowout mode setting operation lever 36 on the control panel 33
When the ENT (i2 position (not shown) is operated), the damper 28
is operated to the position 28a in FIG. 4, and the damper 29 is operated to the position 29a in FIG. 4, respectively.

In addition, since the temperature adjustment operation lever 37 is operated in the COOL temporal region (fifth Z range) of the control panel 33,
Due to the operating characteristics shown in the figure, the temperature control damper (9) 7 remains fixed at the position 7a in FIG. 4.

Therefore, the ventilation passages 5 of the three heater cores remain closed, and the damper 7 also performs the function of mode switching for setting the cooling/ventilation mode.

Then, when the blower 9 is operated by the blower control switch 49, the blown air flows only through the ventilation passages 6 of the four evaporators, passes through the evaporator 4, and then passes through the Ghent outlet 22, and then passes through the Ghent outlet 22, and then the Ghent outlet grille 32. It blows out from the chisel into the passenger compartment. If you turn on the compressor operation switch 48,
Since the electromagnetic clutch 43 is energized via the switch 42 and the compressor 44 is driven by the vehicle engine, the blown air is cooled in the evaporator 4 and becomes cold air, making it possible to cool the interior of the vehicle.

Temperature control during cooling can be performed by changing the compressor operating temperature setting of the control circuit 41 using the temperature adjustment operation lever 37. That is, as shown in Figure 5,
Set the operating position of the temperature adjustment operating lever 37 to the maximum cooling position (
As the variable resistor (10) is moved from the COOL side to the heating side within the region Z, the value of the variable resistor (10) changes, the set temperature becomes higher, and the temperature of the cold air at the evaporator outlet becomes higher. At this time, the temperature control damper 7 remains fixed at the position 7a, so it does not affect temperature control during cooling. Further, since no water valve is provided in the hot water circuit of the heater core 3, hot water is constantly flowing, but no problem occurs because the high temperature air around the heater core 11 does not leak into the vehicle interior.

On the other hand, if the compressor operation switch 48 is turned off to stop the compressor 44, and the inside/outside air switching damper 12 is operated to the outside air side to open the outside air intake port 13, the outside air of the vehicle is transferred to the evaporator 4 side ventilation path. The air can be blown into the vehicle interior from the upper blow-off grille 32 through 6 to ventilate the vehicle interior.

(2) Move the heating (HEAT) mode blowout mode setting operating lever 36 to HE on the panel 33.
When the damper 2B is operated to the A T position (U shown in the figure), the damper 2B is moved to the position 28c in Fig. 4, and the damper 29 is moved to the position 28c in Fig. 4.
They are each operated to the position 9b.

Therefore, the air outlet of the heater core 3 and the air outlet side of the evaporator 4 come into communication via the communication passage 27, and the vent air outlet 22 is closed, and the foot air outlet 23, 24 is closed.
．． 25 and the defroster outlet 26 are opened. Now, in this state, when the temperature adjustment operation lever 37 is operated to the maximum heating position (HOT), the temperature adjustment damper 7 is operated to the position 7b in FIG.
to the maximum, and completely close the evaporator 4 side ventilation passage 6. Therefore, all the blown air passes through the ventilation path 5 side, is heated by the heater core 3, becomes warm air, and is heated by the foot air outlet 23.2.
4.25 and defroster outlet 26.

Moreover, when the temperature control lever 37 is operated to the intermediate position between 7a and 7b, the ventilation passage 6 on the evaporator 4 side opens, so that a part of the blown air is transferred to the evaporator 4.
After passing through, it passes through the communication passage 27 to the air outlet 23.2.
4, 25, and 26 into the inlet 11, where it is mixed with warm air. Therefore, - each of the above air outlets 23.24.25.2
The temperature of the hot air blown out from 6 can be appropriately lowered, and temperature control can be performed. The air volume ratio of the cold air and the hot air, that is, the temperature of the blown air can be freely adjusted by adjusting the position of the damper 7. Since the defroster outlet 26 opens at a position where the cold air from the communication passage 27 can easily flow in compared to the foot outlet 23, 24, 25, the temperature of the air blown out is always slightly lower than that of the foot outlet. Become. Therefore, a comfortable temperature distribution of the blown air with cold head and warm feet can be obtained.

(3) BT-LEVEL mode Move the operation lever 36 for setting the blowout mode to BL-LEVEL on the panel 33.
When operated to the L position (not shown), the damper 28 is moved to the intermediate position 28b in FIG. 4, and the damper 29 is moved to the intermediate position 29b in FIG.
are operated to the respective positions. Then, when the damper 7 is operated to the intermediate position between 7a and 7b using the temperature control operation lever 37, the blown air is transferred to the vent outlet 22 and the foot outlet 2.
3.24.25 and the defroster outlet 26. In this case, the temperature of the air blown out from the three outlets gradually decreases in the order of foot outlet 23, 24, 25 - defroster outlet 26 - vent outlet (13) 22, so that a comfortable outlet temperature distribution for cold head and feet is achieved. can get.

Temperature control can be performed by changing the value of the variable resistor 38 to change the compressor operating temperature setting, and by changing the mixing ratio of cold and hot air by adjusting the opening degree of the damper 7.

(4) Defroster (DEF) mode Move the operation lever 36 for setting the blowout mode to the DEF mode on the panel 33.
When the damper 28 is moved to the position 28C in FIG. 4 and the damper 29 is moved to the position 29a in FIG. 4, only the defroster outlet 26 opens. Therefore, all the blown air is blown out from the defroster outlet 26, and the function of defogging the windshield 21 is maximized. Temperature control is performed by adjusting the opening of the damper 7.

Although the embodiments described above show preferred embodiments of the present invention, the present invention is not limited thereto and can be modified in various ways.

For example, in the above embodiment, the degree of blackness (14) of the evaporator 4 is detected by the temperature sensor 40, but the degree of cooling of the evaporator 4 is detected by a thermostat that opens and closes an electric switch according to the medium pressure in the temperature-sensitive tube. The thermostat may be used to control the energization of the electromagnetic clutch 43 on and off.

In addition, in the embodiment described in -F, the temperature control operation lever ＼-3
7 operates both the temperature control damper 7 and the variable resistor 38 that adjusts the compressor operation set temperature, but lever 3
The variable resistor 38 may be separated from the operating mechanism 7, and the variable resistor 38 may be operated, for example, by the operating knob 34 of the compressor operating switch 48. In this case, open and close the switch 48 by operating the knob 34, and
It is preferable to operate the variable resistor 38 by the rotation operation in step 4.

In addition, the operating lever 36.3 on the space control panel 33
Instead of directly operating each damper etc. with the manual operation force of 7.39, an actuating device (diaphragm actuator, motor, etc.) electrically controlled by each lever 36.37° 39 is provided, and this actuating device operates each damper etc. Of course, it is also possible to operate the following.

In addition, in the characteristics shown in FIG. 5, the compressor operating set temperature remains constant in a predetermined range on the heating (HOT) side with respect to the operating position of the operating lever 37, but for the entire operating range of the operating lever 37. It is also possible to configure the compressor to change the compressor operation set temperature.

(Effects of the Invention) As understood from the above description, in the present invention, the ventilation passage 5 for air passing through the heater core 3 and the ventilation passage 6 for air passing through the evaporator 4 are configured in parallel in the air conditioning case 2. At the same time, the heater core 3 and the evaporator 4
are arranged orthogonally in the air conditioning case 2, and a temperature control damper 7 for regulating air inflow to the both air passages is installed in a space 8 sandwiched between the heater core 3 and the evaporator 4. A blower 9 that blows air is directly connected to the space 8 to constitute one air conditioning unit A, and this air conditioning unit 8 is installed near the center inside the instrument panel in the passenger compartment. An excellent effect is that the space inside the instrument panel on the passenger side, which was mostly occupied by the cooling unit, can be used effectively as ample storage space for a glow box or as a space for placing other automotive equipment. be.

Moreover, in the present invention, the heater core 3 and the evaporator 4 are arranged orthogonally, and the space 8 sandwiched between the two
Since the temperature control damper 7 is installed in the air conditioning unit A, the overall shape of the air conditioning unit A can be made extremely compact.

Furthermore, by configuring the ventilation passages 6 of the four evaporators and the ventilation passage 6 on the heater core 3 side in parallel, the Gent outlet 22 for blowing out cold air can be provided immediately after the evaporator 4 blows out, and as a result, the cooling mode The effect is that the ventilation resistance during cooling can be reduced and the air volume during cooling can be increased.

[Brief explanation of the drawing]

The drawings are for explaining the present invention in detail. Figure 1 is a perspective view of the vehicle instrument panel (17) showing the installation location of the device of the present invention, and Figure 2 illustrates the specific structure of the device of the present invention. 3 is a schematic configuration diagram showing the refrigeration cycle and electric circuit of the device of the present invention, FIG. 4 is a longitudinal sectional view of the main part for explaining the operation of the device of the present invention, and FIG. 5 is a diagram of the device of the present invention. This is a graph for explaining the operation. A... Air conditioning unit 1... Instrument panel, 2... Air conditioning case, 3... Heater core, 4... Evaporator, 5°6... Ventilation duct, 7... Temperature control damper , 8
...Space, 9...Blower. Representative patent attorney Takashi Okabe (l 8)

Claims (3)

[Claims] (1) In an automotive air conditioner having a refrigeration cycle evaporator and a heater core that uses engine cooling water, a ventilation path for air passing through the heater core and a ventilation path for air passing through the evaporator are arranged in an air conditioning case. The heater core and the evaporator are arranged in parallel with each other, and the heater core and the evaporator are arranged orthogonally in the air conditioning case, and a temperature control damper is provided in a space sandwiched between the heater core and the evaporator to adjust the inflow of air to the both air passages. installed,
Furthermore, a blower for blowing air into the space is directly connected to the space to form one air conditioning unit, and this air conditioning unit is installed near the center inside the instrument panel inside the vehicle. air conditioning equipment. (2) The heater core is arranged substantially horizontally in a lower portion within the air conditioning case, and the evaporator (1) is arranged substantially vertically within the air conditioning case. The automotive air conditioner according to item 1. (3) The air conditioner for an automobile according to claim 1 or 2, wherein the air conditioning case and the casing of the blower are integrally molded from resin.