KR20040102529A - Door driving unit for air conditioner - Google Patents

Abstract

PURPOSE: A door drive unit for an air conditioner is provided to shorten the length of an assembling process by reducing the number of parts and to reduce the production cost by the reduction of the number of parts. CONSTITUTION: A door drive unit for an air conditioner has a cam(120) having at least one guide slot at a predetermined position and an air conditioner case(110) having a combining unit for rotatably combining the cam. The cam is combined to the guide slot to provide rotational force for rotating the door. The combining unit includes a protruded part(111) in which the cam is inserted, and a hook part(112) extended from the protruded part to prevent upward separation of the cam. The protruded part is protruded about perpendicularly from the air conditioner case. The protruded part and the hook part are integrally formed.

Description

Door driving unit for air conditioner

The present invention relates to an air conditioner for a vehicle, and more particularly, to rotate a door installed in an air conditioning case of an air conditioner such as an internal / external air changeover door, a ventilation changeover door, and a temporal door to a desired position according to a mode selected by a passenger. A door drive unit for an air conditioner.

In general, the vehicle air conditioner is to create a comfortable environment by adjusting the temperature and humidity in the vehicle interior, and includes a cooling device for cooling the interior of the vehicle according to the purpose, and a heating device for heating the interior of the vehicle interior.

The cooling device is a device for producing cold air by absorbing the latent heat of vaporization necessary for the evaporation of the refrigerant from the air flowing around the evaporator while the refrigerant flows into the evaporator, and supplies the produced cold air into the cabin.

The heating apparatus generally induces high temperature coolant that has cooled the engine to the heater core, and generates warmth by heating air flowing around the heater core by the coolant induced in the heater core. It is a device that supplies the vehicle interior.

In the air conditioner configured as described above, in order to properly supply cold air or warm air into the cabin in response to the mode selected by the occupant, the air and / or bet may be selectively sucked, and the cold or warm air having the desired temperature and humidity may be Doors for selectively discharging to a desired position are provided. To this end, an inlet / outer air switching door is installed at the inlet end of the air conditioning case to control the opening and closing of the inlet or the outside air selectively, and the air passing through the evaporator selectively passes through the heater core inside the air conditioning case. Temp door is installed. In addition, a plurality of blower switching doors are installed at the outlet end of the air conditioning case to control the opening and closing of the defrost vent, the face vent, or the foot vent to discharge the air-conditioned air to a desired position in the cabin.

The internal / external air switching door, the temp door, and the ventilation switching doors are controlled by the door driving unit to open / close angle thereof, which will be described with reference to FIG. 1.

1 is a front view showing an example of a door driving unit for a general air conditioner. Here, the door driving unit is illustrated by way of example only for the first driving unit for driving the blowing switching door and the second driving unit for driving the temper door, but is not limited thereto.

Referring to the drawings, the first driving unit 20 has a cam 21 formed with three guide slots 21a at a set position. However, the number of the guide slots 21a may be added or decreased corresponding to the number of doors to be controlled. The cam 21 is rotatably installed in the air conditioning case 10 by a coupling means to be described later. In addition, a cable 24 that provides a rotational force for rotating the cam 21 is fixed to one side of the cam 21. At the side of the cam 21, three levers 22 are provided with pins 22a slidably installed in the guide slot 21a at one end thereof to receive rotational force from the cam 21. Arms 23 are connected to the other ends of the levers 22, and one end of each of the arms 23 has a rotary shaft 11 of a blower switching door (not shown) installed inside the air conditioning case 10. Connected. Here, the cam 21 is rotated by the forward and backward operation of the cable 24 corresponding to the operation of the occupant, the pin 22a of the lever 22 slides in the guide slot 21a in accordance with the rotation of the cam. By doing so, the lever 22 and the arm 23 interlock to rotate the rotary shaft 11 of the airflow switching door to a desired position.

The second driving unit 20 'includes a cam 21' having one guide slot 21a 'formed thereon, and a cable 24' is fixed to one side of the cam 21 '. The pin 22a 'is slidably inserted into the guide slot 21a'. Here, the rotation shaft (not shown) of the temp door installed in the air conditioning case 10 is rotated through a process similar to the first driving unit 20 ′.

Here, reference numerals 25 and 25 ', which are not described, refer to cams corresponding to respective modes when the air conditioning case 10 in which the first driving unit 20 and the second driving unit 20' are mounted is installed inside the vehicle. Representation means for setting the position of.

On the other hand, the cam (21, 21 ') is rotatably coupled to one outer surface of the air conditioning case 10 by a coupling means. Fig. 2 shows a coupling means of the cams 21 and 21 'according to the prior art, and shows a cross section corresponding to the line I-I of Fig. 1.

As shown, the cams 21 and 21 'are fixed to the boss 10a of the air conditioning case 10 by screwing, and at this time, the cams 21, which are fixed to the air conditioning case 10 by external vibration or the like, are fixed. 21 '), for example, a washer such as a spring washer 27 is inserted to fix it with a screw 26.

However, in the coupling means of the conventional cam configured as described above, since the washer 27 as well as the screw 26 must be used to fix the cams 20 and 20 ', the number of parts increases and causes a cost increase. do. In addition, there is a problem in that the assembly is cumbersome and the productivity is lowered.

The present invention was created to solve the above problems, it is possible to reduce the number of parts by reducing the number of parts, and to provide a door drive unit for an air conditioner that can reduce the production cost according to the reduction of parts. The purpose is.

1 is a front view showing an example of a door driving unit for a general air conditioner;

Figure 2 shows a coupling means of the cam according to the prior art, a cross-sectional view corresponding to the line I-I of FIG.

3 is a view showing a coupling means of a cam according to an embodiment of the present invention.

4 is a partial perspective view showing a coupling means of the cam shown in FIG.

<Brief description of symbols for the main parts of the drawings>

11 ... Rotating shafts 21a, 21a '...

22.Lever 22a, 22a '... pin

23 Arm 24, 24 'Cable

25,25 '... setting means 110 ... air conditioning case

111 Projection 112 Hook section

113 Slot 120 Cam

In order to achieve the above object, the door driving unit for an air conditioner according to the present invention, at least one guide slot is formed in a set position, and is coupled to the guide slot to provide a rotational force for rotating the door; ; And an air conditioning case having a coupling means for rotatably coupling the cam, wherein the coupling means includes a protrusion protruding substantially perpendicularly from the air conditioning case to insert the cam, and an extension extending from the protrusion. It characterized in that it comprises a hook portion to prevent the departure in the vertical direction.

Here, the protrusion and the hook portion is preferably formed integrally.

In addition, the protrusion and the hook portion is preferably formed with at least one slot in the vertical direction.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view corresponding to the line I-I of Figure 1 showing the coupling means of the cam according to an embodiment of the present invention, Figure 4 is a partial perspective view showing the coupling means of the cam shown in FIG. However, in the door driving unit to be described later, the driving unit of the blower switching door is described as an example, but the features of the present invention disclosed herein may be commonly applied to the internal and external air switching doors and the temporal door, and thus the scope of the present invention is unreasonable. It should be understood that it is not limited.

1 and 3, a door driving unit for an air conditioner according to an embodiment of the present invention includes a cam 120 having at least one guide slot 21a formed at a predetermined position. The cam 120 is rotatably installed in the air conditioning case 110 by a coupling means to be described later. In addition, a cable 24 that provides a rotational force for rotating the cam 120 is fixed to one side of the cam 120.

At least one lever 22 having a pin 22a slidably installed in the guide slot 21a at one end thereof and receiving the rotational force from the cam 120 is installed at the side of the cam 120. Arms 23 are connected to the other ends of the levers 22, and one end of each of the arms 23 has a rotary shaft 11 of a blowing switching door (not shown) installed inside the air conditioning case 110. Connected.

In the embodiment configured as described above, according to one feature of the present invention, the coupling means is projected substantially vertically from the air conditioning case 110, the projections 111 into which the cam 120 is inserted, and the projections 111 It extends from) and includes a hook portion 112 for restraining the cam 120 from escaping in the vertical direction. Here, the protrusion 111 and the hook portion 112 is preferably formed integrally by injection.

Therefore, the number of parts can be reduced by omitting the screw 26 (FIG. 2) and the washer 27 (FIG. 2), which are conventionally used to fix the cam 21 (FIG. 1), thereby reducing the number of assembly operations. Productivity is improved. In addition, production costs can be reduced due to reduced parts.

On the other hand, in order to improve the coupling when the cam 120 is inserted into the protrusion 111, the protrusion 111 and the hook portion 112, at least one slot 113 in the vertical direction is to be formed Can be.

Therefore, when the cam 120 is inserted into the protrusion 111, since the protrusion 111 and the hook 112 easily elastically deform due to the slot 113, the cam 120 is easily projected to the protrusion 111. ) Can be inserted.

As described above, according to the door driving unit for an air conditioner according to the present invention, the following effects can be obtained.

First, by omitting the screw and washer for fixing the conventional cam, it is possible to shorten the assembly maneuver in accordance with the reduction of the number of parts, thereby improving the work productivity.

Second, production costs can be reduced as parts are reduced.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it is merely an example, and those skilled in the art may realize various modifications and equivalent other embodiments therefrom. Will understand. Therefore, the true scope of protection of the present invention should be defined by the technical spirit of the appended claims.

Claims (3)

At least one guide slot is formed at a predetermined position and is coupled to the guide slot to provide a rotational force for rotating the door; An air conditioner door driving unit comprising: an air conditioning case having a coupling means for rotatably coupling the cam. The coupling means may include a protrusion protruding substantially vertically from the air conditioning case to insert the cam, and a hook portion extending from the protrusion to prevent detachment of the cam in a vertical direction. Door drive unit. The method of claim 1, The door driving unit for the air conditioner, characterized in that the protrusion and the hook portion formed integrally. The method according to claim 1 or 2, At least one slot is formed in the protruding portion and the hook portion in the vertical direction, the door driving unit for the air conditioner.