JPH0924724A - Air-conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operating feeling of an air passage changeover device. SOLUTION: In the downstream of an evaporator 2, an inner wall 7 on which a cold passage opening 5 and a hot air passage opening 6 are formed is formed along the whole passage of a case 1. This inner wall 7 is inclined in the direction to make the part on the upper sides of the cold air passage opening 5 and the hot air passage opening 6 downstream. Between the inner wall 7 and the evaporator 2, an air mixing door 9 is provided. A door main body 9a is displaced along the inner wall 7, and regulates the ratio of the air flowing into a cold air passage 3 and a hot air passage 4. The air passing through the evaporator 2 is decomposed into the upward force along a plane 21, and a force in the direction vertical to the plane 21. Consequently, the operating force necessary to displace the door main body 9a upward can be reduced. As a result, the operation feeling can improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner equipped with an air mix door for adjusting the mixing ratio of cold air and warm air.

[0002]

2. Description of the Related Art Conventionally, as an air conditioner having an air mix door, as disclosed in Japanese Utility Model Publication No. 6-71222, an air mix door having a substantially flat door body is moved up and down, It is known to adjust the ratio of the air passing through the evaporator into the hot air passage and the cold air passage.

[0003]

However, in Japanese Utility Model Laid-Open No. 6-71222, since the air mix door is provided almost vertically, it collides with the door body 100 of the air mix door as shown in FIG. Since the direction of the force of the air to be applied is almost perpendicular to the surface of the door body 100,
Door body 10 having force F10 that collides with this door body 100
The force of 0 being decomposed in the sliding direction is 0. Therefore, the force acting on the door body 100 of the air mix door is only the own weight F20 of the air mix door. Therefore, the operating force required to move the air mix door is large when it is moved upward and is small when it is moved downward. Therefore, the difference between the operating force required to move the air mix door upward and the operating force required to move the air mix door downward becomes large, and the air mix door is operated manually by the passenger. Has a problem in that the operation feeling is deteriorated and the occupant feels uncomfortable, and when the operation of the air mix door is performed by a driving means such as a servomotor, it is necessary depending on the moving direction of the air mix door. There is a problem that it is difficult to adjust various operating forces.

The present invention has been made in view of the above points, and an object thereof is to improve the operation feeling.

[0005]

In order to solve the above-mentioned problems, the first aspect of the present invention is that a) a case (1) having an air passage through which air flows, and (b) a case (1) housed in the case (1). An evaporator (2) for cooling the air passing therethrough, and (c) a heater core (10) for heating the air passing through the evaporator (2) downstream of the evaporator (2) in the flow of the air. And (d) the hot air passage (4) in which the hot air passage (4) is formed in the uppermost part of the air flow of the hot air passage (4), and the air that has passed through the evaporator (2) A warm air passage opening (6) for flowing into the passage (4), and e) a cold air passage (3) bypassing the warm air passage (4).
F) On the same plane as the hot air passage opening (6), the air formed in the uppermost stream of the air flow of the cold air passage (3) and passing through the evaporator (2). A cold air passage opening (5) for flowing air into the cold air passage (3), and g) a downstream side of the air flow with respect to the evaporator (2), and the warm air passage opening (6) and the cold air. The hot air passage opening (6) and the cold air passage opening (5) are arranged upstream of the passage opening (5) so as to overlap the hot air passage opening (6) and the hot air passage opening (6). A substantially flat door body (which moves so that the area overlapping the cold air passage opening (5) changes and adjusts the proportion of the air passing through the hot air passage (4) and the cold air passage (3) ( 21) and a displacement means for moving the door body (9a) In the air conditioning apparatus having an air mixing door (9) having a 12) and, in the plane (7) of the cold air passage opening (5) and the warm air passage opening (6) are formed,
A plane (7) in which the cold air passage opening (5) and the warm air passage opening (6) are arranged in a direction such that the upper portion is on the downstream side of the air flow, is inclined at a predetermined angle, The technical means of arranging the air mix door (9) so that the plane (7) and the plate surface (21) of the door body (9a) are substantially parallel to each other is adopted.

Further, in claim 2, in claim 1,
The cold air passage opening (5) is replaced with the warm air passage opening (6).
The technical means of arranging it above is adopted.

[0007]

According to the present invention having the above-mentioned structure, the air flowing inside the air passage collides with the plate surface of the air mix door. The plane where the above-mentioned portion and the warm air passage opening are formed, is inclined in such a direction that the upper portion thereof is on the downstream side of the air flow, and the plate surface of the substantially flat air-mix door is formed into the cold air passage opening. By arranging so as to be substantially parallel to the plane where the hot air passage opening and the hot air passage opening are formed, the force due to the air that has collided with the plate surface of the air mix door is, as shown in FIG. Upward force F1 along
And a force F2 perpendicular to the plate surface of the air mix door. The air mix door moves along the plane where the cold air passage opening and the warm air passage opening are formed so that the area where the cold air passage opening and the hot air passage opening overlap is changed, but it is disassembled and generated. Due to the upward force F1 along the plate surface of the air mix door, the operation force required to move the air mix door upward is reduced. Therefore,
It is possible to reduce the difference between the operating force required to move the air mix door upward and the operating force required to move the air mix door downward due to the weight f of the air mix door. Can be improved.

In the second aspect, the same action and effect as those of the first aspect can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an air conditioner for a vehicle air conditioner will be described below with reference to the drawings. FIG. 1 is an overall schematic configuration diagram of a vehicle air conditioner. The vehicle air conditioner includes a case 1 for introducing air into the vehicle compartment, and an air conditioning functional component arranged in the case 1.

The case 1 is made of a resin such as polypropylene. An inside / outside air switching device (not shown) that selects whether the air sucked into the case 1 is the inside air or the outside air is arranged in the case 1 on the most upstream side of the air. Further, a blower (not shown) for generating an air flow in the case 1 is arranged at a portion downstream of the inside / outside air switching device. When this blower rotates, the inside air or the outside air is sucked into the case 1, and an air flow toward the vehicle interior is generated.

An evaporator 2 for cooling the air passing therethrough is disposed in a portion of the case 1 downstream of the blower. The evaporator 2 is connected to a condenser, a compressor, a liquid tank, and an expansion valve (not shown) by piping to form a refrigeration cycle, and is erected so as to substantially close the passage cross section of the case 1. The air generated by the blower is transferred to the case 1 through the blower communication port 1a.
It flows in and flows in in the direction of the evaporator 2.

A portion of the case 1 on the downstream side of the evaporator 2 is branched into two parts, a cold air passage 3 and a warm air passage 4. The cold air passage 3 and the hot air passage 4 are partitioned by a partition wall 8 provided in parallel with the flow of air flowing in the case 1. The upper part of the partition wall 8 is the cold air passage 3, and the lower part of the partition wall 8 is the warm air passage 4.

An inner wall 7 is formed over the entire passage of the case 1 at the uppermost stream side of the cold air passage 3 and the hot air passage 4. A cold air passage opening 5 having a substantially rectangular opening shape is formed in a portion of the inner wall 7 on the most upstream side of the cold air passage 3. Further, a warm air passage opening 6 having a substantially rectangular opening shape is formed in a portion of the inner wall 7 on the most upstream side of the warm air passage 4. And
The cold air passage opening 5 and the warm air passage opening 6 are formed on the same plane, and the air that has passed through the evaporator 2 flows into the cold air passage 3 and the warm air passage 4 through these openings 5 and 6. To do.

The inner wall 7 is inclined at a predetermined angle with respect to the air flow direction in a direction in which the upper portion is on the downstream side of the air flow, that is, in the direction away from the evaporator 2, and the cold air passage opening portion is formed. 5 and the warm air passage opening portion 6 are formed so as to be inclined so that the respective upper portions thereof are on the downstream side as compared with the lower portion. The air that has passed through the evaporator 2 is sent to the passages 3 and 4 through the openings 5 and 6. All of the air taken in from the warm air passage opening 6 is sent to the heater core 10 described later. On the other hand, all the air taken in from the cold air passage opening 5 bypasses the heater core 10.

An air mix door 9 that allows the air flowing into the cool air passage 3 and the air flowing into the warm air passage 4 to flow in a desired ratio in a portion downstream of the evaporator 2 and upstream of the inner wall 7. Is provided. The air mix door 9 will be described in detail later. A heater core 10 for heating passing air is erected in the hot air passage 4 so as to substantially close the passage cross section, and all the air passing through the warm air passage 4 passes through the heater core 10. The heater core 10 uses the engine cooling water as a heat source and intermittently supplies the amount of engine cooling water flowing inside or the engine cooling water to obtain a necessary heating capacity.

An air mix portion 11 for mixing the cold air passing through the cold air passage 3 and the hot air passing through the warm air passage 4 in a portion of the case 1 on the downstream side of the cold air passage 3 and the hot air passage 4. Is provided and the air conditioning temperature can be adjusted. A portion of the case 1 on the downstream side of the air mix portion 11 communicates with the communication duct 16 and the communication duct 17 for guiding the air whose temperature is adjusted by the air mix portion 11 into the vehicle interior.
It is branched into two. In FIG. 1, the communication duct 16
Extends upward, and the communication duct 17 extends downward.

On the downstream side of the communication duct 16, a face communication opening 13 for blowing out the conditioned air toward the upper half of the occupant and a defroster communication opening for blowing out the conditioned air toward the inner surface of the windshield of the vehicle. 15 and 15 are open respectively. On the other hand, on the downstream side of the communication duct 17, a foot communication opening 14 for blowing out conditioned air toward the lower half of the occupant is opened.

At the branch portion between the communication duct 16 and the communication duct 17, the air whose temperature is adjusted by the air mix section 11 is blown to the communication duct 16 or the communication duct 1
A switching door 19 for selectively deciding whether to blow air to 7 is provided. Further, the switching door 19 of the communication duct 16
A switching door 18 that selectively determines whether the air blown to the communication duct 16 is blown out from the face communication opening 13 or the defroster communication opening 15 is arranged in a portion on the downstream side of the air. .

When the switching door 19 is in the turning position a in FIG. 1, all the conditioned air is sent to the communication duct 16.
On the other hand, when the switching door 19 is in the rotating position shown in FIG. 1B, all the conditioned air is blown to the communication duct 17 and blown out from the foot communication opening 14. Further, when the switching door 19 is in the rotating position shown as a in FIG. 1 and the switching door 18 is in the rotating position shown in FIG. 1c, the conditioned air is blown out from the defroster communication opening 15. On the other hand, the switching door 19 is in the rotation position shown as a in FIG. 1, and the switching door 18 is d in FIG.
In the rotating position, the air conditioning air is blown out from the face communication opening 13.

As described above, by moving the switching doors 18 and 19 in accordance with the modes such as face, foot, and diff, whether air is blown out from the face communication opening 13 or the foot communication opening 14. Whether to blow out from the defroster communication opening 15 is selectively determined. Next, the air mix door 9 described above will be described in detail.

The air mix door 9 comprises a substantially flat door body 9a and a displacement means for displacing the door body 9a, and an adjusting member 12 for adjusting its position. FIG. 2 is a view showing a state in which the air mix door 9 is attached inside the case 1. 3 is a perspective view of the door body 9a, and FIG. 4 is an exploded view of the door body 9a. As shown in FIG. 4, the door body 9a includes a support member 20 having a substantially flat plate shape.
And a film member 22 arranged so as to cover the support member 20.

The support member 20 is made of a resin such as polypropylene and is formed into a substantially rectangular plate shape.
The flat surface portion 21 of the support member 20, which is the plate surface of the door body 9a.
The four penetrating portions 24a to 24d are formed in each of them, and as shown in FIG. 2, they have a frame-like shape just like the Chinese character of Kanji and have a cross-shaped supporting portion 20a. . Both ends on the long side of the support member 20 (both ends on the front side and the back side of the paper in FIG. 2) are bent substantially vertically.
The attachment portions 25a and 25b are provided. This mounting part 25
Projections 26 are formed on a and 25b so as to project toward the outside of the support member 20 at equal intervals.

On the other hand, columnar holding portions 32 for holding the supporting member 20 in the case 1 are formed to project at both ends of the supporting member 20 on the short side. Further, a bearing portion 27 having a bearing groove 37 is projectingly provided on the upper surface of the support portion 20a of the support member 20. The film member 22 has no air permeability, is flexible, and has a small frictional resistance.
For example, it is made of a PET (polyethylene terephthalate) film of 75 μm and has a substantially rectangular shape.
Mounting holes 28 are formed at both ends on the long side of the film member 22 at the same intervals as the protrusions 26 formed on the support member 20. Further, when the film member 22 is attached to the support member 20, the insertion hole 30 into which the bearing portion 27 is inserted is formed in the portion of the film member 22 where the bearing portion 27 overlaps.

The mounting hole 28 on one side of the film member 22 is fitted into the protruding portion 26 of the supporting member 20, and the bearing portion 27 is inserted into the insertion hole 30, while the mounting hole 28 on the opposite side is protruding portion of the supporting member 20. 26. Further, the film member 22 is fixed to the support member 20 by melting the protrusion 26 with a heating device (not shown) to heat-bond the film member 22 to the attachment portions 25a and 25b.
(See FIG. 3) The length of the long side of the film member 22 (the length indicated by Z in FIG. 4) is the length of the long side of the support member 20 (W in FIG. 4).
It is the same as the length shown in. On the other hand, the length of the short side of the film member 22 (the length indicated by Y in FIG. 4) is the length of the short side of the support member 20 (the length indicated by X in FIG. 4) and the mounting portion 25a. , 25b (2 of the width shown by V in FIG. 4)
Double) is longer than the combined length.

Therefore, as shown in FIG. 3, the film member 22 is fixed to the support member 20 in a bent state so that a space is formed between the flat portion 21 of the support member 20 and the film member 22. Both ends of the adjusting member 12 are the case 1
And a drive shaft 200 that is rotatably supported by the drive shaft 2.
00, and has an adjusting portion 34 that adjusts the air flow direction of the case 1, and an arm portion 35 that connects the drive shaft 200 and the air mix door 9.

One end of the drive shaft 200 is projected to the outside and a lever 23 is attached. This lever 23
Is connected to drive means (not shown) such as a control cable for driving the drive shaft 200 or a servomotor. The drive shaft 200 includes a plate-shaped member for adjusting portion 34.
Is attached, and the orientation of the plate surface of the adjusting unit 34 changes as the drive shaft 200 rotates.

The arm portion 35 is a long plate-shaped member, and a cylindrical protrusion portion 36 is formed at one end thereof. On the other hand, the other end of the arm portion 35 is attached to the drive shaft 200 such that the plate surface of the arm portion 35 is substantially perpendicular to the plate surface of the adjusting portion 34. Next, a method of mounting the air mix door 9 in the case 1 will be described. Case 1 shown in FIG.
Can be divided into two on the front side and the back side of the paper. Inside the dividable case 1, as shown in FIG. 2, a guide groove 33 having an elongated hole cross section is formed. The guide groove 33 is formed on the upstream side of the flow of air with respect to the inner wall 7 and inclined at substantially the same angle as the inner wall 7. (In FIG. 2, only the guide groove 33 located on the back side of the paper surface in FIG. 1 is shown.) The door body 9a is oriented so that the flat surface portion 21 of the support member 20 is oriented toward the air passing through the evaporator 2. The holding portion 32 of the support member 20 is fitted into the housing 1 and is held in the case 1 so as to be slidable along the guide groove 33. Therefore, in the air mix door 9, the flat portion 21 is inclined with respect to the flow of air flowing in the case 1,
Move inside Case 1.

Further, the protrusion 3 of the arm 35 of the adjusting member 12
6 is a bearing groove 36 formed in the bearing portion 27 of the door body 9a.
And the drive shaft 200 and the door body 9a are connected to each other. Next, the operation of the present embodiment will be described. When the drive means operates and the drive shaft 200 rotates, the drive shaft 20
The arm 35 attached to 0 rotates, and the protrusion 36 of the arm 35 is displaced vertically. With the displacement of the protrusion 36, the door body 9 a moves up and down along the guide groove 33 between the cold air passage opening 5 and the warm air passage opening 6. By moving the door body 9a in this manner, the ratio of the air passing through the evaporator 2 into the cold air passage 3 and the warm air passage 4 is adjusted.

At this time, the guide groove 33 is inclined at a predetermined angle with respect to the air flow direction so that the upper portion thereof is located on the downstream side of the air flow. Therefore, the door body 9a
Is in a state in which the flat portion 21 is inclined with respect to the flow of air flowing in the case 1. By the way, evaporator 2
Part of the air that has passed through collides with the door body 9a and pushes the door body 9a. As shown in FIG. 5, since it is inclined at a predetermined angle with respect to the flow of air flowing in the case 1,
The force F that pushes the door body 9a is decomposed into a component F1 along the plane portion 21 of the door body 9a and a component F2 in a direction perpendicular to this component. Since the direction of the component F1 generated when the force F pushing the door body 9a is decomposed is upward, the door body 9a
Will be part of the force to move the. Also, the component F1
The component F2 in the direction perpendicular to is also used as a sealing force for sealing the door body 9a and the openings 5 and 6. On the other hand, the dead weight f of the door body 9a is decomposed into a downward component f1 parallel to the flat portion 21 of the door body 9a and a component f2 in a direction perpendicular to this component, so that the dead weight f of the door body 9a is decomposed. The resulting component f1 is smaller than f. Therefore, compared with the conventional structure in which the air mix door is substantially perpendicular to the air flow, the door body 9a is constructed by adopting the structure of this embodiment.
The force for moving the door main body 9a can be increased and the force for moving the door main body 9a can be decreased, and the operation force required for moving the door body 9a upward and the force necessary for moving the door body 9a downward can be obtained. The difference from the operating force can be reduced. As a result, the operation feeling can be improved when the air mix door 9 is manually operated. On the other hand, when the air mix door 9 is operated by a driving means such as a servo motor, fine adjustment can be performed more easily.

In the above embodiment, the cold air passage opening is arranged above the warm air passage opening. However, even if the warm air passage opening is arranged above the cold air passage opening, the air mix may be arranged. The operation force required to move the door upward can be reduced.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of a vehicle air conditioner to which the present invention has been applied.

FIG. 2 is a view showing a state in which an air mix door 9 is attached inside a case 1.

FIG. 3 is a perspective view of a door body 9a.

FIG. 4 is an exploded view of a door body 9a.

FIG. 5 is a diagram provided to explain the operation of a vehicle air conditioner to which the present invention has been applied.

FIG. 6 is a diagram provided to explain the operation of a conventional example.

[Explanation of symbols]

 1 Case 2 Evaporator 3 Cold Air Passage 4 Hot Air Passage 5 Cold Air Passage Opening 6 Hot Air Passage Opening 9 Air Mix Door 9a Door Main Body 10 Heater Core 12 Adjusting Member 21 Displacement Means Flat Surface that is the Plate Surface of Door Main Body 9a

Claims (2)

[Claims] 1. An a) case having an air passage through which air flows, b) an evaporator which is housed in the case and cools the air passing therethrough, and c) a flow of the air from the evaporator. On the downstream side, a warm air passage in which a heater core that heats the air that has passed through the evaporator is arranged, and d) the hot air passage is formed at the most upstream part of the air flow and has passed through the evaporator. A warm air passage opening that allows the air to flow into the warm air passage; e) a cold air passage that bypasses the warm air passage; and f) the cold air passage on the same plane as the warm air passage opening. A cold air passage opening formed in the uppermost part of the air flow for allowing the air that has passed through the evaporator to flow into the cold air passage; and g) a flow of the air rather than the evaporator. Downstream of this,
The hot air passage opening and the cold air passage opening are arranged on the upstream side of the air flow with respect to the hot air passage opening and the cold air passage opening so as to overlap the hot air passage opening and the cold air passage opening. A substantially flat door main body that moves so that the area overlapping the passage opening changes and adjusts the proportion of the air that passes through the hot air passage and the cold air passage, and a displacement means that moves the door main body. In an air conditioner having an air mix door having the cold air in a direction such that an upper portion of a plane where the cold air passage opening and the warm air passage opening are formed is a downstream side of an air flow. A plane in which the passage opening and the warm air passage opening are arranged is inclined at a predetermined angle, and the air mix door is arranged so that the plane and the plate surface of the door body are substantially parallel to each other. Air conditioning system. 2. The air conditioner according to claim 1, wherein the cold air passage opening is arranged above the warm air passage opening.