JPS5831692Y2 - Automotive air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a damper operating mechanism in an automobile air conditioner.

Conventionally, in automotive air conditioners, a rotating disk of a negative pressure switching device is rotated by linearly moving an operating lever provided on a control panel in the left-right direction, and the rotation of this rotating disk causes a negative pressure to be applied to a diaphragm actuator. Pressure and atmospheric pressure are introduced selectively, and the diaphragm actuator drives a damper such as an outlet switching damper.

However, in the conventional device described above, the linear motion of the operating lever is converted into the rotational motion of the rotating disk of the negative pressure switching device.
This has the disadvantage that the number of parts inevitably increases and the cost increases.

Furthermore, there is a drawback that the connecting portion between the operating lever and the negative pressure switching device tends to become loose, resulting in malfunction.

The present invention was developed in view of the above points, and by configuring the negative pressure switching device to be operated directly manually using a rotary knob, the number of parts is reduced and costs are reduced.
An object of the present invention is to provide an air conditioner for an automobile that can prevent malfunctions due to rattling.

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

First, the overall configuration of the automobile air conditioner shown in FIG. 1 will be described.

Reference numeral 1 denotes a case made of synthetic resin, which has a vehicle interior air intake 2 and a vehicle exterior air intake 3 at one end, and a hot air outlet 4 that opens downward into the vehicle interior and an opening above the vehicle interior at the other end. It has a defroster outlet 5.

This case 1 is installed on the back side of the front instrument panel (not shown) in the vehicle interior.
The warm air outlet 4 is located at the feet of the front seat occupant, and the defroster outlet 5 is connected via a connecting hose (not shown) to a defroster nozzle (not shown) installed at the bottom of the front window glass.

Reference numeral 6 denotes a front outlet, which communicates with the cold air blowing lower at the center of the instrument panel and the cold air blowing ports 8 and 9 on the sides.

The cold air blowing lower 8.9 is provided with variable loopers 7a, 8a, and 9a that can adjust the blowing direction vertically and horizontally, and blows cold air toward the upper body of the front seat occupant.

10 is a centrifugal fan, and 11 is an electric motor that drives this centrifugal fan 10.

The motor 11 is configured such that its rotation on/off and the number of rotations thereof are controlled by turning on a manual switch (not shown).

12 is an inside/outside air switching damper, and this switching damper 12 is a first
negative pressure introduced into the pressure chamber of the diaphragm actuator 13;
It is actuated by atmospheric pressure through a diaphragm (not shown) and rod.

14 is a cooler core (evaporator) housed in case 1;
5 is a heater core housed in the case 1.

The heater core 15 uses engine cooling water as a heat source, and the inflow of the cooling water is controlled by a hot water valve provided in the middle of the hot water piping.

Reference numeral 16 denotes a temperature adjustment damper whose opening degree can be continuously adjusted within the range of arrow 17, and which controls the amount of cold air cooled by the cooler core 14 flowing into the heater core 15 and the bypass path 18 of the heater core 15. This is to adjust the amount of bypass.

This temperature adjustment damper 16 is connected via a control wire to a manually operated operating lever provided on a control panel portion of the air conditioner.

Reference numeral 19 denotes a switching damper that selectively opens and closes the front outlet 6 and the defroster outlet 5, and this switching damper 19 is operated by a second diaphragm actuator 20.

21 is a froster switching damper that opens and closes the froster outlet 5; 22 is a warm air switching damper that opens and closes the hot air outlet 4; both dampers 21 and 22 are interlocked with each other and are operated by a third diaphragm actuator 23; It has become.

Note that when negative pressure is introduced into the pressure chambers of the first diaphragm actuator 13, the second diaphragm actuator 20, and the third diaphragm actuator 23, the switching dampers 12, 19, 21 and 22 operate in the solid line position in the figure.

Next, referring to FIGS. 2 and 3, a negative pressure switching device that switches between negative pressure and atmospheric pressure of the second and third diaphragm actuators 20 and 23 will be explained. The air conditioner control panel installed in the vicinity is made by bending a metal plate such as an iron plate (resin plate is also possible) into an L shape, and has a fitting hole 2 into which the negative pressure switch 25 fits.
It has 4 a.

The negative pressure switching device 25 includes a fixed disk 26, a rotating disk 27,
The fixed disc 26 includes a negative pressure introduction pipe 26a, an atmosphere introduction pipe 26b, and an output vibrator 26 communicating with the diaphragm actuator 20 of FIG.
C and an output vibe 26d communicating with the diaphragm actuator 23 of FIG. 1 are integrally provided.

The intake negative pressure of the automobile engine is introduced into the negative pressure introduction pipe 26a.

The two discs 26 and 27 may be made of either metal or resin, and are airtightly and rotatably assembled with an air circuit sealing gasket in between.

To explain this point in more detail, the fixed disk 26 has a mounting arm (not shown) protruding from its outer periphery, and this arm is tightened and fixed to the back side of the control panel 24 with a bolt. The rotary disk 27 is airtightly and rotatably assembled to the stationary disk 26 via the gasket with an appropriate spring force.

Both the rotating disk 27 and the stationary disk 26 are arranged on the back side of the control panel 24 as shown in FIG.

The rotating disk 27 has a ring-shaped flange portion 27 on its outer periphery.
A is formed integrally with the flange portion 27a, and a plurality of holes 27b, two in this example, are provided in the flange portion 27a.

On the other hand, the rotary knob 28 is made of elastic resin such as ABS.
Two mounting claw portions 28a and a handle portion 28b made of resin are integrally formed.

The rotary knob 28 is integrally assembled to the rotary disk 27 by fitting and locking the claw portion 28a into the hole 27b of the rotary disk 27 using the elasticity of the resin.

The rotary knob 28 also fits into the fitting hole 24 of the control panel 24.
The control panel 24 is disposed from the back side to the front side of the control panel 24 through a.

VENT, HEAT, DE written on the control panel 24
The letter F indicates ventilation mode, heating mode, and defroster mode, respectively.

To explain the operation in the above configuration, when the rotary knob 28 of the negative pressure switching device 25 is operated to the VENT position as shown in FIG. Diaphragm actuator 20.
Atmospheric pressure is introduced into both dampers 19 and 23, and dampers 19 and 21
．． 22 are respectively operated to the positions shown by the broken lines in FIG.
Only the front outlet 6 is opened, and the hot air outlet 4 and the defroster outlet 5 are closed.

Therefore, the air blown by the centrifugal fan 10 is blown into the vehicle interior through the front outlet 6, the cold air blowing lower part 8.9.

At this time, the vehicle interior can be ventilated by opening the exterior air intake port 3 and introducing outside air, and cooling can be performed by operating the cooler core 14.

Next, when the rotary knob 28 is rotated to the DEF position,
Since negative pressure is introduced into the diaphragm actuator 20 and atmospheric pressure is introduced into the diaphragm actuator 23, the damper 19 is operated to the solid line position to close the front outlet 6, and the dampers 21 and 22 are moved to the broken line position. When operated, the defroster outlet 5 is opened and the warm air outlet 4 is closed.

Therefore, all of the warm air heated by the heater core 15 can be blown onto the front glass through the defroster outlet 5 and the defroster nozzle.

Next, when the rotary knob 28 is turned to the HEAT position,
Since negative pressure is introduced into each of the diaphragm actuators 20.23, the dampers 19, 21.22 are all operated to the solid line position in the figure, the warm air outlet 4 is fully opened, and the defroster outlet 5 is slightly opened. be done.

Therefore, most of the hot air is blown out from the hot air outlet 4 to the passenger's feet, and a small amount of the hot air is blown onto the windshield via the froster outlet 5 and the froster nozzle.

In the above embodiment, explanation of the negative pressure switching device that selectively introduces negative pressure and atmospheric pressure into the driving diaphragm actuator 13 of the inside/outside air switching damper 12 has been omitted, but this negative pressure switching device also includes a second negative pressure switching device.
It goes without saying that the rotary negative pressure switching device 25 shown in FIGS. 4 to 4 can be similarly applied.

As described above, the present invention includes a diaphragm actuator for driving a damper such as an outlet switching damper and an inside/outside air switching damper, a negative pressure switch that selectively introduces negative pressure and atmospheric pressure into the diaphragm actuator, and an air conditioner control panel having a fitting hole into which the negative pressure switching device is fitted, and the negative pressure switching device includes at least a fixed disk, a rotating disk, and a rotary knob, and the disk is The rotary knob is disposed on the back side of the air conditioner control panel, and the rotary knob is disposed through the fitting hole from the front side to the back side of the air conditioner control panel. The rotary knob is integrally formed with a mounting claw part made of elastic resin, and by fitting and locking the claw part into a locking part provided on the rotary disk, the rotary knob is rotated. Since it has a structure that is directly connected to the disk, the negative pressure switching device can be directly operated manually using the rotary knob protruding from the front side of the air conditioner control panel, and the operating mechanism of the negative pressure switching device is therefore much simpler than conventional products. However, it can be greatly simplified, and the reduction in the number of parts can significantly reduce part manufacturing costs and assembly man-hours, and malfunctions due to straggling can be prevented, which is a great effect.

Furthermore, the overall shape of the negative pressure switching device is extremely small, which has a great effect in that it can be easily installed in the interior of an automobile where installation space is extremely limited.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic sectional view showing the ventilation system of an automobile air conditioner; FIG. 2 is a partially sectional side view showing the mounting part of a negative pressure switch; Figure 3 is the second
FIG. 4 is a front view, and FIG. 4 is a perspective view of the rotary knob shown in FIGS. 2 and 3. 3...Inside and outside air switching damper, 19, 21.22.
...Outlet switching damper, 13, 20, 23...
... diaphragm actuator, 24 ... control panel, 25 ... negative pressure switch, 28 ... rotary knob.

Claims (1)

[Scope of utility model registration request] A diaphragm actuator for driving a damper such as an outlet switching damper, an inside/outside air switching damper, etc., a negative pressure switching device that selectively introduces negative pressure and atmospheric pressure to this diaphragm actuator, and this negative pressure switching device are mated together. an air conditioner control panel having a fitting hole, and the negative pressure switching device includes at least a fixed disk, a rotating disk, and a rotary knob, and the side disk is located on the back side of the air conditioner control panel. The rotary knob is disposed through the fitting hole and extends from the front side to the back side of the air conditioner control panel, and the rotary knob is made of elastic resin. The rotary knob is integrally formed with a mounting claw part, and the rotary knob is directly coupled to the rotating disc by fitting and locking the claw part into a locking part provided on the rotating disc. An automotive air conditioner characterized by: