JP2552627Y2 - Door structure of automotive 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 a door structure for improving the temperature control characteristics of a vehicle air conditioner.

[0002]

2. Description of the Related Art Generally, an air conditioner for a vehicle includes:
Various doors are provided to control the flow of air. For example, in the automotive air conditioner shown in FIG. 5, the intake door 8 is mounted in the unit case 1a of the intake unit 1, and the mix door 13 and the like are mounted in the unit case 3a of the heater unit 3. Since these doors 8, 13 and the like are provided so as to rotate inside the unit cases 1a, 3a, the unit case 1
A certain gap is formed between the side walls of a and 3a. That is, while rotating the fan 5 in the fan scroll 1b, the intake door 8 in the unit case 1a is rotated so as to appropriately select an A position for closing the inside air inlet 6 and a B position for closing the outside air inlet 7. And the outside air intake 7
Can take in outside air into the intake unit 1 from the inside air inlet 6, but the intake door 8 smoothly rotates between the door 8 and the side wall of the unit case 1 a. Has a certain gap.

Since the cooler unit 2 is a part for simply cooling the air from the intake unit 1, there is no door, and the refrigerant from the refrigerant conduit 9 of the cooling circuit is supplied to the expansion valve 1.
Only an evaporator 11 is provided which flows in through 0.

In the heater unit 3, a heater core 12 for injecting engine cooling water through a valve (not shown) for heating the inflowing air is incorporated. Is provided with a mix door 13 for adjusting the ratio of the amount of air flowing into the heater core 12 and the amount of air passing through a bypass passage 24 through which air bypassing the heater core 12 flows. The mix door 13 operates the open position (C position), the closed position (D position), or any intermediate position therebetween, for example, the E position, so that all the air flowing into the heater unit 3 is moved by the heater core 12. Heated air is sent into the vehicle interior, or a part of the air is passed through the heater core 12 and the other air is passed through the bypass passage 24, and then mixed and sent to the vehicle interior without mixing. I try to send.

The mixing chamber 1 is located downstream of the heater core 12.
The mixing chamber 14 is provided with a differential duct outlet 15 for guiding air from the heater unit to blow air along the inner surface of the windshield, and a foot duct outlet for blowing air toward the feet of the occupant. 16 and a vent duct opening 18 for sending air into the vehicle cabin from a vent opening formed in the instrument panel in front of the driver's seat, and a differential door 19 is provided in the differential duct outlet 15.
A vent door 20 is provided at the vent duct outlet 18, and a foot door 21 is provided at the foot duct outlet 16.

The mixing door 1 in the heater unit 3
3 has a door body 13a, and a packing 13b attached along the outer peripheral edges of the front and back surfaces of the door body 13a. When the door 13 is in the open position and the closed position, the packing 13b is completely used. Although the mixing door 13 also rotates inside the unit case 3a of the heater unit 3, it is sealed, as shown in FIG.
A gap G of a predetermined amount or more is provided between the heater unit 3 and the unit case 3a so that the opening / closing operation is performed smoothly.

[0007]

However, when a gap is provided between the door and the unit case as described above, for example, in the case of the mixed door 13, the heater core 12 is fully opened in the full hot state (position C). ), The cool air circulates through the gap G, even though the mix door 13 is not closed much, whereby a large amount of cool air enters the mixing chamber 14 side, and the temperature in the mixing chamber 14 rises sharply. And temperature control characteristics are reduced.

The present invention has been made in view of such a problem, and the temperature control characteristic does not change remarkably even when the door starts to operate, and the temperature control characteristic is changed according to the opening degree of the door. It is an object of the present invention to provide a door structure of an air conditioner for a vehicle in which a temperature control characteristic is improved so as to be changed. Another object of the present invention is to improve the temperature control characteristics easily by improving the mounting of the seal packing.

[0009]

SUMMARY OF THE INVENTION In order to achieve the object, the present invention provides a flat door body and a door body (1).
3a) a door of an air conditioner for an automobile having a packing attached along at least one of the front and back outer peripheral edges, a chamfered portion is formed on an outer peripheral edge of the door body, and a cross section is formed on the chamfered portion. A door structure for an air conditioner for an automobile, wherein a rectangular packing is adhered, and a pointed outer periphery of the packing is in line contact with a side wall of a unit case of the air conditioner for an automobile.

[0010]

According to the present invention, only the packing is attached to the chamfer of the door body, and the point protrudes so as to come into line contact with the side wall of the unit case. It is possible to maintain the opening and closing operation smoothly, and furthermore, due to the presence of such a packing, the sealing property between the unit case and the door is improved, and a sudden temperature drop at the start of door operation is prevented, The temperature control characteristics will be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a mix door of the automotive air conditioner according to the present invention, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, and FIG. 3 shows a state of the mix door at the time of sealing. FIGS. 4 and 5 show the temperature control characteristics of the mixed door. FIG. 4A is an explanatory view showing the present invention, and FIG. 4B is an explanatory view showing the conventional one, and is common to the members shown in FIGS. The same reference numerals are given to the members to be performed.

Heater unit 3 for an automotive air conditioner
Moves the mix door 13 to the open position (C
Position), the closed position (D position) or any intermediate position therebetween, for example, the E position, thereby adjusting the amount of air flowing into the heater core 12 and the amount of air flowing through the bypass passage 24. After all the air flowing into the heater core 12 is heated by the heater core 12, the air is sent into the vehicle interior, or a part of the air is heated by the heater core 12, and the other air passes through the bypass passage 24 while keeping the cool air. They are mixed and sent into the vehicle interior, or sent to the vehicle interior from several outlets without mixing.

As shown in FIG. 1, a mixed door 13 incorporated in the heater unit 3 is integrally attached to a support shaft 30 and has a door body 31 made of a substantially rectangular synthetic resin plate as a whole. An upper packing 32a made of a band-shaped urethane or the like having a rectangular cross section adhered along the outer peripheral edge of the upper surface of the door main body 31 with an adhesive, and the outer peripheral edge of the lower surface of the door main body 31 is cut off at an inclination angle of about 45 degrees And a lower packing 32b made of band-shaped urethane or the like having a rectangular cross section adhered to the chamfered portion 32 (see FIG. 2) formed by the adhesive.

In particular, as shown in FIG. 2, the lower packing 32b is adhered to the chamfered portion 32 formed by cutting off the outer peripheral edge of the lower surface of the door body 31 at an inclination angle of about 45 degrees. Inevitably, the pointed end s protrudes from the side wall of the unit case 3a and is provided so as to make line contact. Even when the mixing door 13 is rotated, the lower packing 32b allows the unit case 3b to be easily mounted. 3
A gap can be prevented from being formed between the side wall of “a” and the mix door 13.

The synthetic resin plate body 31 has a bulge 33 formed in the center and a bead 34 spanning between the bulge 33 and the outer peripheral edge, thereby providing the rigidity of the entire door body 31. To increase. Further, in order to reduce the weight and increase the rigidity of the door body 31, a large number of grooves 35 may be formed intermittently in the outer peripheral edge portion where the packing 32b is bonded. In some cases, the mix door 13 is not brought into direct contact with the heater core 12; however, in such a case, as shown in FIG. The wall may be inclined so as to be along the packing 32b.

The thus configured mix door 13
Is rotated in the unit case 3a of the heater unit 3, and is set at a position C in contact with the top wall when the maximum heating is full hot. This is the D position to cover.
Further, for example, when a temperature control lever (not shown) is set at an intermediate temperature of about 25 degrees Celsius, the position becomes the E position.

Here, the lower packing 32b is provided in line contact with the side wall of the unit case 3a when the mix door 13 at the time of full hot starts rotating from the position C to the position E. So mix door 1
3 starts to operate even if the mix door 13 starts operating.
There is no gap between the wall and the side wall, and the cold air does not flow around and flow into the mixing chamber 14. Therefore, the cool air from the cooler unit does not abnormally flow into the mixing chamber 14, so that a rapid temperature drop is prevented and the temperature control characteristics are improved. Moreover, even when the mix door 13 rotates, the lower packing 32b and the side wall are in line contact with each other, so that the frictional resistance is small and the opening and closing operation of the mix door 13 is smooth.

Next, when the temperature characteristics when the mixed door of the present embodiment is used are compared with the case where the conventional mixed door is used, the temperature control characteristics of several stages are improved as is clear from FIG. become. As shown in FIG. 4 (a), the temperature control characteristic of the present embodiment is such that, regardless of the foot and the differential, the temperature of the mixed door does not change extremely even when the mixed door is opened and closed, regardless of whether the mixed door is opened or closed. The temperature state according to the opening degree of is obtained. On the other hand, in the conventional device, as shown in FIG. 4B, when the mix door is slightly opened from the full hot state, the temperature of both the foot and the differential drops. As a result, in this example, it was confirmed that there was no sharp temperature drop that occurred when the mixing door started rotating from the closed position (C position) as in the conventional example.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims for utility model registration. For example, the door is not limited to a mixed door only, and in some cases, the packing can be used for an intake door or a door provided for various temperature adjustments. In some cases, it may be provided on the upper side.

[0020]

As described above, according to the present invention, only the packing is attached to the chamfer of the door body, and the pointed end protrudes so as to come into line contact with the side wall of the unit case. And the temperature control characteristics of the door are improved. Further, since the packing only makes line contact with the side wall of the unit case, the door can be smoothly operated without frictional force.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mix door according to an embodiment of the present invention;

2 is a sectional view taken along line 2-2 in FIG. 1,

FIG. 3 is a view showing a state of the mix door at the time of sealing,

4A and 4B are diagrams showing temperature control characteristics, FIG. 4A is a diagram related to the present invention, FIG. 4B is an explanatory diagram showing a conventional device,

FIG. 5 is a schematic sectional view of a general automotive air conditioner,

FIG. 6 is an explanatory view showing a conventional mix door portion.

[Explanation of symbols]

3a: Unit case, 31: Door body,
32a, 32b: packing, 33: chamfer, s
… A point.

Claims (1)

(57) [Scope of request for utility model registration] 1. A flat door body (31), and the door body
(31), a packing (32a, 32b) attached along at least one of the front and rear outer peripheral surfaces of the door of the automotive air conditioner, wherein the outer peripheral edge of the door body (31) has a chamfered portion ( 33) is formed, a packing (32a or 32b) having a rectangular cross section is attached to the chamfered part (33), and the packing (32a or 32b) is formed.
A door structure for an air conditioner for an automobile, characterized in that an outer peripheral point (s) of the door is in line contact with a side wall of a unit case (3a) of the air conditioner for an automobile.