JP4455919B2 - Hot / cold air switch structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle warm / cold air switch structure.

A vehicle such as an automobile is provided with a cup holder in the passenger compartment. There are some cup holders that can keep the beverage warm and cool by hot air or cold air. For example, the thing which attached the cup holder to the existing blower outlet of an air conditioner (refer patent document 1), the thing which provided the exclusive blower outlet separately from the air conditioner (refer patent document 2), etc. are known. .
Registered Utility Model No. 3009494 JP 2002-2354 A

  In the cup holder with a heat insulation and cooling function described in Patent Documents 1 and 2, since the heat insulation and cooling are performed by using the air outlet of the air conditioner, the cup holder is kept in the cold insulation mode during the heating operation of the air conditioner. In other words, there is a problem that the cup holder cannot be in the heat retaining mode during the cooling operation of the air conditioner.

  On the other hand, some large vehicles such as trucks are equipped with a warm refrigerator. By using warm air or cold air for the warm refrigerator, regardless of the operation mode of the air conditioner, the cup holder is kept warm and cool. It has been considered to be able to select arbitrarily.

  A hot / cold air switch is required to switch the cup holder's hot / cold mode, but it is easy to use a rotary drum type that is easy to operate and looks good. In addition, it is required to have a structure with little wind leakage.

In order to solve the above-mentioned problem, in the invention described in claim 1, a substantially bottomed cylindrical switch body having a hot air inlet, a cold air inlet, and a hot air outlet at a required pitch on the peripheral surface, The switch body has an operation dial that rotatably closes the opening end of the switch body via a sealing material, and a shaft portion that is disposed at the axial center position of the switch body and is rotated by the operation dial. A switching blade that is provided and has a sealing blade that is slidably rotated along the inner peripheral surface and the bottom inner surface of the switch body, and a switching valve that can switch a hot air inlet with respect to the hot and cold air outlet and a communication state of the cold air inlet. The shaft part of the switching valve penetrates the bottom axial center position of the switch body, and the moving ring type cam follower is splined so that it can move in the axial direction in the shaft part and rotate integrally with the rotational direction. fitting, and the mobile ring type Kamufu Provided depressible resilient member to the cam surface formed on the outer bottom surface of the switch body to the lower, during the rotation of the operation dial, only the mobile ring type cam follower against the pressing force by the elastic member along the shaft portion By moving in the axial direction, it is possible to maintain a sealed state between the opening end of the switch body and the operation dial and between the inner peripheral surface and bottom inner surface of the switch body and the seal blade. It features a warm / cold air switch structure for vehicles.

According to the first aspect of the present invention, when the operation dial is rotated, the sealing blade of the switching valve rotates about the shaft portion, and the hot air inlet and the communication state of the cold air inlet with respect to the hot and cold air outlet are switched. Thereby, it becomes possible to select hot air blowing / cold air blowing / wind stop with a simple structure. In this case, the mobile ring type cam follower which is spline-fitted into the through portion of the shaft portion, by moving to follow the cam surface formed on the outer bottom surface of the switch body while rotating integrally with the shaft portion, warm air blowing out, cold air Seal blades can be stopped with a sense of moderation at each selected position of blowout and wind stop. On the other hand, the opening end of the switch body and the operation dial are elastically contacted with a sealing material interposed therebetween, and the seal blade rotates in sliding contact along the inner peripheral surface and bottom inner surface of the switch body. As a result, a basic structure effective for preventing wind leakage is provided. In addition, the cam surface is formed on the outer surface of the bottom of the switch body, and only the moving ring cam follower is moved in the axial direction along the shaft portion against the pressing force of the elastic member. Does not affect the seal blade and the operation dial when moving over the cam surface. A constant sealing state can be maintained even during rotation. Therefore, it is possible to prevent wind leakage during rotation of the operation dial.

  The purpose of obtaining a simple and less air leakage structure is that the shaft portion of the switching valve penetrates the position of the center of the bottom of the switch body, and the shaft portion can be moved relative to the axial direction in the direction of rotation. On the other hand, a moving ring type cam follower that rotates integrally with the moving ring type cam follower is fitted, and an elastic member that can press the moving ring type cam follower on the cam surface formed on the bottom outer surface of the switch body is provided.

  Embodiments of the present invention will be described below together with illustrated examples.

  1 to 7 show an embodiment of the present invention.

  First, the configuration will be described. As shown in FIG. 1, an air conditioner 1 of a large vehicle such as a truck includes an air conditioner body 5 including a fan 2, an evaporator 3, and a heater core 4.

  The hot refrigerator 7 provided in the large vehicle has a cold air duct 9 for taking out cold air of about 5 ° C. immediately after exiting the evaporator 3, and a temperature for taking out hot air of about 60 ° C. to 70 ° C. immediately after the heater core 4. The air duct 10 is connected, and hot and cold air is circulated from the hot refrigerator 7 to the fan 2 through the return duct 11. The cold air duct 9 and the hot air duct 10 are switched by a switching device 12.

  Then, the branch cold air duct 15 branched from the cold air duct 9 and the branch hot air duct 16 branched from the hot air duct 10 are connected to the cup holder 21 via the hot / cold air switching device 20, and the cold air or the hot air is supplied to the cup holder. The beverage 22 held in the cup holder 21 can be kept warm and cool.

  In this embodiment, as shown in FIGS. 2 to 4, a rotary drum type that is easy to operate and has a good appearance is adopted as the hot / cold air switching unit 20. The rotary drum type hot / cold air switch 20 includes a substantially bottomed cylindrical switch body 29 having a hot air inlet 25, a cold air inlet 26, and a hot / cold air outlet 27 at a required pitch on the circumferential surface. Note that the branch hot air duct 16 is connected to the hot air inlet 25, and the branch cold air duct 15 is connected to the cold air inlet 26. Further, the hot and cold air outlets 27 are formed in a slit shape extending in the circumferential direction, and are provided three vertically.

  The hot / cold air switching device 20 includes an operation dial 32 that closes an opening end 30 of a switch body 29 having a substantially bottomed cylindrical shape through a sealing material 31. A flange 33 is provided at the open end 30 of the switch main body 29, and a ring-shaped sealing material 31 is attached along the flange 33. The operation dial 32 has a substantially disc shape and is elastically contacted with the sealing material 31, a gripping part 35 projecting in a diametrical direction on the outer surface of the operation dial body 34, and a switch body 29. And a peripheral wall 36 surrounding the flange 33.

  Further, the hot / cold air switching device 20 has a shaft portion 39 which is arranged at the axial center position of the switching device main body 29 and is rotated by the operation dial 32, and is provided on the shaft portion 39 and is provided on the inner periphery of the switching device main body 29. And a switching blade 41 that can switch the communication state of the hot air inlet 25 with respect to the hot and cold air outlet 27 and the communication state of the cold air inlet 26. Two seal blades 40 are provided at a required angle. Each sealing blade 40 includes a sheet-like sealing material 42 and a pair of plate-like holding members 43 that sandwich the sealing material 42 from both sides. Note that the upper end of the shaft portion 39 is fitted to the axial center position of the operation dial 32 so as to be integrally rotatable. 3 is in close contact with the operation dial 32.

  Then, the shaft portion 39 of the switching valve 41 passes through the bottom axial center position of the switch main body 29, and is movable in the axial direction to the through portion 45 of the shaft portion 39 and rotates integrally with the rotation direction. A moving ring type cam follower 46 as shown in FIG. The moving ring cam follower 46 and the penetrating portion 45 of the shaft portion 39 are spline-fitted (spline fitting portion 47).

  Further, an elastic member 49 capable of pressing the moving ring cam follower 46 to the cam surface 48 formed on the outer surface of the bottom of the switch body 29 is provided. The elastic member 49 is interposed between the head portion of the screw 50 screwed to the end of the penetrating portion 45 of the shaft portion 39 and the moving ring type cam follower 46, and on the upper end side of the shaft portion 39 in FIG. It also functions to bring the operation dial 32 into elastic contact with the sealing material 31. The elastic member 49 is composed of a compression spring such as a coil spring, for example.

  Next, the operation of this embodiment will be described.

  When the operation dial 32 is rotated, the seal blade 40 of the switching valve 41 rotates about the shaft portion 39, and the communication state of the hot air inlet 25 and the cold air inlet 26 with respect to the hot and cold air outlet 27 is switched. Thereby, it is possible to select hot air blowing (see FIG. 6), cold air blowing (see FIG. 7), and wind stop (see FIG. 4) with a simple structure.

In this case, by moving the ring-type cam follower 46 which is spline-fitted into the through portion 45 of the shaft portion 39 is moved following the cam surface 48 formed on the outer bottom surface of the switch main body 29 while rotating integrally with the shaft portion 39 The sealing blade 40 can be stopped with a sense of moderation at each selected position of hot air blowing, cold air blowing, and wind stop.

  On the other hand, the opening end 30 of the switch main body 29 and the operation dial 32 are elastically contacted with a sealing material 31 interposed therebetween, and are sealed along the inner peripheral surface and the bottom inner surface of the switch main body 29. When the sealing material 42 of the blade 40 is slidably rotated, a basic structure effective for preventing wind leakage is provided.

  In addition, the cam surface 48 is formed on the bottom outer surface of the switch body 29, and only the moving ring cam follower 46 is moved in the axial direction along the shaft portion 39 against the pressing force of the elastic member 49. The moving ring type cam follower 46 does not affect the seal blade 40 and the operation dial 32 when the cam ring 48 is moved over, and between the opening end 30 of the switch body 29 and the operation dial 32, and the switch The inner peripheral surface and bottom inner surface of the main body 29 and the seal blade 40 can be kept in a constant sealing state even during rotation. Therefore, it is possible to prevent wind leakage when the operation dial 32 is rotating.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention.

It is a systematic diagram of the duct which connects the air conditioner, the warm refrigerator, and the cup holder in the Example of this invention. It is a perspective view of the hot / cold air switching device of FIG. It is a longitudinal cross-sectional view of FIG. FIG. 3 is a horizontal sectional view of FIG. 2. FIG. 4 is a perspective view of the moving ring cam follower of FIG. 3. It is a figure similar to FIG. 4 at the time of warm air blowing mode. It is a figure similar to FIG. 4 at the time of cold wind blowing mode.

Explanation of symbols

25 Hot air inlet 26 Cold air inlet 27 Hot and cold air outlet 29 Switch body 30 Open end 31 Sealing material 32 Operation dial 39 Shaft portion 40 Seal blade 41 Switching valve 45 Through portion 46 Moving ring type cam follower 48 Cam surface 49 Elastic member

Claims (1)

A substantially bottomed cylindrical switch body having a hot air inlet, a cold air inlet, and a hot and cold air outlet at a required pitch on the circumferential surface;
An operation dial for closing the opening end of the switch body through a sealing material in a rotatable manner;
A seal disposed at the axial center position of the switching device main body and having a shaft portion that is rotated by an operation dial, and is provided on the shaft portion and is slidably rotated along the inner peripheral surface and the bottom inner surface of the switching device main body. And a switching valve capable of switching the hot air inlet and the communication state of the cold air inlet with respect to the hot and cold air outlet,
Together with the shaft portion of the switching valve through the bottom axis position of the switch body, splined mobile ring type cam follower to rotate integrally with respect to the rotational direction movable in the through portion of the shaft portion relative to the axial direction And
An elastic member capable of pressing the moving ring type cam follower to the cam surface formed on the bottom outer surface of the switch body is provided , and only the moving ring type cam follower is pivoted against the pressing force of the elastic member while the operation dial is rotating. By moving in the axial direction along the part, the gap between the opening end of the switch body and the operation dial and between the inner peripheral surface and bottom inner surface of the switch body and the sealing blade are kept in a sealed state. A structure for switching between hot and cold air for a vehicle, characterized in that it can be used.

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