JPH09132021A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a membrane shaped member from generating vibration noise caused by step vibration developed by a step motor giving sliding force to the membrane shaped member. SOLUTION: A membrane shaped member 22 is operated so as to be slid by a step motor 28 via a first and a second rotation support shaft 23 and 24. The membrane shaped member 22 is energized to the windward side by an elastic support body 3O (composed of a slide contacting member small in friction coefficient, and of an elastic body) mounted on the side of an air conditioner case close to the first and second rotation support shafts 23 and 21. When the step motor 28 is operated, step vibration developed by the step motor 28 is transferred to the membrane shaped member 22 through the first and second rotation support shafts 23 and 24, since the aforesaid step vibration can be absorbed by the elastic deformation of the elastic support body 30, the membrane shaped member 22 can thereby be prevented from generating vibration noise caused by the step vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that opens and closes an air passage (e.g., an air outlet and an air inlet) provided in an air conditioning member or changes an opening area by a film member.

[0002]

2. Description of the Related Art As an example of a door device that opens and closes an air passage opening or changes an opening area, a conventional technique will be described by using a door device that opens and closes an air outlet of an air-conditioning case or changes an opening area. In a conventional air conditioner, as a door device that opens and closes the air outlet of an air conditioning case, a film member is slid on the inner surface of the air outlet to change the communication state between the opening provided in the film member and the air outlet. The technology is known. The film member is supported by a rotary support shaft in the air-conditioning case, and the film member slides by rotationally driving the rotary support shaft.

[0003]

As a means for rotationally driving the rotary support shaft to slide the film-shaped member, for example, a step motor is used, and the number of steps is controlled to set the blowing mode (for example, , The blowing area can be changed, the outlet can be switched, etc.). The step motor and the rotation support shaft are directly or indirectly connected to each other, but since the rotational force generated by the step motor is linearly transmitted to the rotation support shaft, the step vibration generated by the step motor is rotated. It is transmitted to the film-shaped member via the support shaft.

That is, the step vibration generated by the step motor is transmitted to the film-shaped member, and the film-shaped member serves as a vibrating body to generate vibration noise. In particular, at the outlet, since the film member contacts the inner surface of the air conditioning case due to the wind pressure, the vibration of the film member is also transmitted to the air conditioning case, and the film member and the air conditioning case generate vibration noise.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the vibration noise of a film member by the vibration generated by a driving means such as a step motor that applies a sliding force to the film member. It is to provide an air conditioner that does not generate

[0006]

[Means for Solving the Problems]

[Means for Claim 1] By adopting claim 1, the following effects are obtained. When the drive means operates, the rotational force of the drive means is transmitted to the rotation support shaft to slide the film member. At this time, the vibration generated by the driving means is transmitted to the film-shaped member via the rotation support shaft. Since this film-shaped member is biased by the elastic support member from the air conditioning member side, the vibration transmitted to the film-shaped member is absorbed by the elastic deformation of the elastic support member.

As described above, since the vibration transmitted to the film member is absorbed by the elastic deformation of the elastic support member, the vibration of the film member is attenuated and the noise due to the vibration of the film member can be suppressed.

[Means for Claim 2] By adopting claim 2, the following operational effects can be obtained. The film member is urged by the elastic body while being in contact with the sliding contact member having a small frictional resistance, so that the sliding resistance between the film member and the elastic support member is small. Therefore, in order to absorb the vibration of the film member,
Even if the elastic support body is biased to the film-shaped member, it is possible to suppress the problem that the operation force when the film-shaped member is slid is increased.

[Means for Claim 3] By adopting claim 3, the following operational effects can be obtained. Since the elastic support absorbs the vibration of the film-shaped member in the vicinity of the rotation support shaft, it is possible to suppress the transmission of the vibration to the film-shaped member in the portion supported between the rotation support shafts, and to suppress the vibration noise. Can be increased.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of an air conditioner of the present invention will be described with reference to the drawings. [Structure of Embodiment] FIGS. 1 to 4 show an embodiment, and FIG. 4 is a schematic sectional view of a vehicle air conditioner.

The air conditioner 1 includes an air conditioning case 2 (an example of the air conditioning component of the present invention) through which air blown into the vehicle compartment flows. The air conditioner case 2 is connected to a blower 3 that supplies air into the air conditioner case 2 to generate an air flow that blows into the vehicle interior of the air conditioner case 2. A cooling heat exchanger 4 for cooling the air passing through the air conditioning case 2 is arranged on the upstream side of the air inside the air conditioning case 2, and a cooling heat exchanger 4 is arranged on the downstream side of the air inside the air conditioning case 2. A heating heat exchanger 5 capable of heating the air passing through the exchanger 4 is arranged.

Incidentally, the cooling heat exchanger 4 shown in this embodiment.
Is an evaporator, which is a component of a refrigeration cycle, for cooling the air sent by the blower 3 by exchanging heat with a low-temperature low-pressure refrigerant. In addition, the heating heat exchanger 5 according to the present embodiment is a heater core that uses engine cooling water (warm water) as a heat source, and is disposed in the air conditioning case 2 downstream of the cooling heat exchanger 4 to remove passing air. It is to heat.

A heat exchanger 5 for heating in the air conditioning case 2.
A bypass path 6 that bypasses the heating heat exchanger 5 is provided on both sides of the. Further, inside the air conditioning case 2, the amount of air passing through the heating heat exchanger 5 and the bypass 6
An air mix door 7 for changing the mixing ratio with the amount of air passing through is provided.

At the downstream end of the air conditioning case 2, a face outlet 11, a defroster outlet 12, and a foot outlet 13 through which the air passing through the inside of the air conditioning case 2 flows (each outlet is an air passage of the present invention). One example) is provided. Each of these air outlets 11 to 13 is a face air outlet that mainly blows cold air to the upper half of the occupant of the passenger through a face duct, a defroster duct, and a foot duct (all are not shown), and warm air is mainly applied to the inner surface of the windshield. Is connected to a defroster outlet that blows out hot air and a foot outlet (not shown) that mainly blows warm air to the feet of the occupant.

Inside the downstream of the air conditioning case 2, each outlet 1
A mode switching door device 20 for switching the blowing modes by changing the opening areas of 1 to 13 is arranged. This door device 20 is one to which the present invention is applied, and will be described using the schematic diagrams of FIGS. 1 and 2 (where the intermediate shaft is omitted).

The door device 20 slides along the inner surface of the air conditioning case 2 having the air outlets 11 to 13 and has a flexible portion 21 having an opening portion 21 for changing the opening area of the air outlets 11 to 13. The belt-shaped film member 22 is provided.

Further, the door device 20 includes a first rotary support shaft 23 and a second rotary support shaft 24 which support both ends of the film member 22, and respective ends of the first and second rotary support shafts 23, 24. First pulley 25 and second pulley 2 connected to the section
6. The first rotary support shaft 23 is rotationally driven via the first pulley 25, and the film member is attached to the second rotary support shaft 24 via the cable 27 spanning the first and second pulleys 25 and 26. Step motor 2 which gives a rotating force for winding 22
8 (corresponding to a driving unit) and an intermediate shaft 29 that allows the film-shaped member 22 to extend along the inner wall of the air conditioning case 2. A spring 30 is interposed between the second pulley 26 and the second rotation support shaft 24 to prevent the film member 22 and the cable 27 from being loosened. The step motor 28 is set in the blowing mode by controlling the rotation direction and the number of rotation steps by a control circuit (not shown).

The air conditioning case 2 near each of the first and second rotary support shafts 23 and 24 (the portion where the film member 22 is wound and has the maximum diameter and does not hit the wound film member). Is provided with an elastically deformable elastic support body 31 for urging the film-shaped member 22 to the windward side. Since the elastic support body 31 is provided at a portion that does not contact the wound film member, the operation force is not increased due to the thickening of the film member 22.

As shown in FIG. 3, the elastic support member 31 has a sliding contact member 32 (for example, a resin plate) having a low friction coefficient that moves in contact with the film member 22, and the sliding contact member 32. And an air-conditioning case 2, and is elastically deformable with the sliding contact member 32 pressed to the windward side (for example, a packing used for the A / C unit outlet has sufficient elasticity). (Resin elastic body).

[Operation of Embodiment] Next, the operation of the door device 20 will be described. When the blowing mode is switched, the step motor 28 is rotated by a signal from the control device,
As the first and second rotation support shafts 23 and 24 rotate, the film member 22 slides inside the outlets 11 to 13. When the film member 22 slides, the opening 21 of the film member 22 changes the opening area of each of the air outlets 11 to 13, and as a result, the blowing mode is switched.

When the step motor 28 is rotated, the rotational force of the step motor 28 is applied to the first and second rotary support shafts 23, 2.
4 is also transmitted to the first and second rotation support shafts 23 and 24. The step vibration transmitted to the first and second rotation support shafts 23 and 24 is transmitted to the film-shaped member 22 from the first and second rotation support shafts 23 and 24, but the film-shaped member 22 is In the vicinity of the second rotation support shafts 23, 24, the elastic support 3
The step vibration transmitted to the film-shaped member 22 is absorbed by the elastic deformation of the elastic body 33 in the elastic support body 31 because it is urged from the air conditioning case 2 side to the windward side by 1. As described above, since the step vibration transmitted to the film-shaped member 22 is absorbed by the elastic deformation of the elastic support 31, the vibration due to the step vibration transmission of the film-shaped member 22 is suppressed.

[Effects of Embodiment] As shown in the above operation, the membranous member 2 from the first and second rotation support shafts 23, 24 side.
The step vibration of the step motor 28 transmitted to 2 is
Since it is absorbed by the elastic deformation of the elastic support 31 and the vibration due to the step vibration transmission of the film member 22 is suppressed, it is possible to suppress the generation of noise due to the vibration of the film member 22.

Further, in this embodiment, since the sliding contact member 32 having a small frictional resistance is provided at the sliding contact portion of the elastic support 31 with the film-shaped member 22, the elastic support 31 is arranged, so that the film-like member is formed. It is possible to solve the problem that the operating force of the member 22 increases.

[Modification] In the above embodiment, the present invention is applied to the door device for switching the blowout mode. However, the present invention is applied to an air mix door or an inside / outside air switching door (not shown). It may be applied to other door devices in the air conditioner. Further, in the above-mentioned embodiment, the step motor is shown as an example of the driving means, but other driving means such as a servo motor or a negative pressure actuator may be used.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a door device.

FIG. 2 is a cross-sectional view showing a schematic configuration of a door device.

FIG. 3 is a cross-sectional view showing an elastic support.

FIG. 4 is a schematic cross-sectional view of a vehicle air conditioner.

[Explanation of symbols]

 1 Air Conditioner 2 Air Conditioning Case (Air Conditioning Member) 11 Face Outlet (Air Passage) 12 Defroster Outlet (Air Passage) 13 Foot Outlet (Air Passage) 20 Door Device 21 Opening 22 Membrane Member 23th DESCRIPTION OF REFERENCE NUMERALS 1 rotation support shaft 24 second rotation support shaft 28 step motor (driving means) 31 elastic support body 32 sliding contact member 33 elastic body

Claims (3)

[Claims] 1. A flexible film-like member having an air-conditioning member having an air passage opening through which an air flow can pass, and an opening that slides along the air-conditioning member and can communicate with the air passage opening. A member, a rotary support shaft that rotatably supports the film-like member, a drive unit that applies a rotational force to the rotary support shaft to generate a sliding force on the film-like member, and a drive unit that is provided on the air conditioning member side An air conditioner, comprising: an elastically deformable elastic support member that urges the film-shaped member along the member. 2. The air conditioner according to claim 1, wherein the elastic support member is a sliding contact member having a low friction coefficient that moves in contact with the film member, and the sliding contact member and the air conditioning member. The air conditioner according to claim 1, further comprising an elastic body interposed between the elastic body and elastically deformable in a state where the sliding contact member is pressed to the windward side. 3. The air conditioner according to claim 1 or 2, wherein the elastic support member is arranged in the vicinity of the rotary support shaft.