JPS61268942A - Blow-off deflecting grill mechanism of air conditioner - Google Patents

Abstract

PURPOSE:To make it possible to use a motor of a small output by transmitting the rotating force of a motor to a reciprocating rod only when a component of a force in a direction parallel to a shifting direction of the reciprocating rod, of the rotating torque of the motor reaches the vicinity of a maximum value. CONSTITUTION:A lip-shaped rotary member 6 starts a continuous constant-speed rotation in accordance with the rotation of a geared motor 4. Therefore, a pressing part 6a comes into contact with a portion 8 to be pressed of an upper reciprocating rod 7, and thereafter presses the part 8 to be pressed by a force corresponding to a component t1 of a force in the direction parallel to the reciprocating rod 7, is pressed in the right side direction. When the pressing part 6a has shifted to a position (a'), the contact state with the part 8 to be pressed is released, and the shifting of the reciprocating rod is stopped. Upon this occasion, a part 8' to be pressed of a lower reciprocating rod 7' placed in an interlocking relationship with an upper reciprocating rod 7 is preset so that it occupies a position (b). When the rotary member 6 continues further to rotate and the lower reciprocating rod 7' in turn is started to shift in the left hand direction, and the part 8' to be pressed reaches a position (b'), its movement is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outlet grille deflection mechanism with reduced operating noise, suitable for use in air conditioners, particularly automobile air conditioners.

[Prior Art] Air conditioners are used to maintain comfortable temperature, humidity, and cleanliness in people's living spaces and vehicle interiors. Since the air is blown out from the extremely narrow area of the air outlet grille into a relatively extremely wide indoor space, the humidity distribution within the space can be made even when the direction of the air is fixed. is nearly impossible.

As a means for equalizing the indoor temperature distribution, it is generally practiced to attach a grill deflection mechanism to cause the blow-off grill to oscillate. FIG. 7 shows a plan view of a conventional grill oscillation mechanism of this type. 4
5 is an electric motor, 5 is its output shaft, 6 is a rotating body attached to the motor output shaft 5, 20 is a pin implanted in the free end of the tongue-shaped rotating body 6, and 22 is a pin that controls the rotational movement of the pin 20. A reciprocating rod for converting into reciprocating motion, and a groove 21 in which a rotating pin 20 is loosely fitted in a direction orthogonal to the longitudinal direction of the reciprocating rod.
A pin slider 21 provided with a is attached. Connecting culms 24 are connected to both ends of the reciprocating rod 22 via pins 23 for causing the fin group 2 of the grill to pivot. The other end of the connecting culm 24 is fixed to the rotating shaft 5 of the fin 2.

30 is a connecting bar for simultaneously rotating the fin group 2 in the same direction through the movement of the two connecting culms 24;
is the attachment part of the connecting bottle.

[Problems to be Solved by the Invention] In the conventional air outlet deflection mechanism having the above configuration, the pin 20 for transmitting the rotational torque of the motor 4 to the reciprocating rod 22 is indicated by a in the figure. When the position is reached, the reciprocating rod 2
The component force in the direction parallel to the reciprocating rod movement direction of the rotational torque (T) of the motor 4, which is the force for moving the reciprocating rod 2, is the maximum (same value as the king), but at 90° rotation angle from position a. It becomes zero at only position b. Therefore, in order to allow the fin group 2 to rotate smoothly and effortlessly against the sliding resistance generated at various parts of the deflection mechanism, the pin 20 must be brought near position b. It was necessary to use a motor 4 with sufficient output so that the required amount of rotational torque could be obtained even when the motor was rotated. In cases where the installation location of the motor 4 is close to the passenger's seating position, such as in an automobile air conditioner, or in an air conditioner installed in an extremely quiet residential building, the motor 4, which is in a fairly small category, may be However, the motor noise is quite unpleasant to the ears, and the magnitude of the noise increases in proportion to the output of the motor, so it is desirable to use a motor 4 that is as small as possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blowout grille deflection mechanism for an air conditioner that can operate smoothly even when using a smaller grille rotation motor than conventional mechanisms.

[Means for Solving the Problems] In order to achieve the above object, the blowout grille deflection mechanism of the air conditioner of the present invention avoids converting the rotational motion of the rotating equipment into reciprocating motion via the link, and changes the wind direction of the grille. tell the deflection plate,
In the blowout grill deflection mechanism for an air conditioner that rotates the deflection plate around its rotational support shaft, the link includes a rotating body having a pressing portion and attached to the rotational shaft of the rotating device, and the pressing portion. It consists of a reciprocating rod having a pressed part that is pressed by the rotor, and a connecting rod that transmits the movement of the reciprocating rod to the wind direction deflection plate, and the rotational torque exerted on the pressed part by the rotary machine is controlled by the rotary rod. When the pressing part reaches the vicinity of a rotational position where the component force in the direction parallel to the reciprocating rod has a maximum value, the pressing part presses the pressed part and causes the reciprocating rod to perform a reciprocating motion. The configuration was adopted.

[Function] The blowout grille deflection mechanism of the present invention having the above-described configuration is such that the component force in the direction parallel to the reciprocating rod of the rotational torque applied to the pressing part of the rotating body as the rotating equipment rotates is close to the maximum value. When the reciprocating rod is reached, this torque component is transmitted to the pressed portion provided on the reciprocating rod to move the reciprocating rod, and this movement causes the wind direction deflection plate of the grill to perform a deflection operation via the connecting culm.

As the rotating body rotates, the rotational position of the pressing part also changes, and the pressing part does not apply a torque component force to the pressed part while it is in a position other than the position where the above component force reaches its maximum value. Therefore, the motor is placed in a no-load condition.

When the rotating body rotates further and the above torque component reaches its maximum value again, this torque component is applied to the reciprocating rod, causing the wind deflection plate to turn in the opposite direction to the deflection direction described above. I am made to do so.

[Embodiment] The structure of the present invention will be specifically explained below based on the embodiment shown in the attached drawings.

FIG. 1 is a partially cutaway perspective view of a case of an air outlet grill of an automatic Φ air conditioner in which a deflection mechanism according to an embodiment of the present invention is assembled, and 1 is a grill case; It has a flat cylindrical shape extending in the blowing direction, and 1a is an air outlet and 1b is an air suction port, which are connected to an air outlet duct (not shown) of an air conditioner. Reference numeral 2 denotes a group of fins as a deflection plate in the air blowing direction, which is assembled into the grill case 1 so as to be rotatable in the horizontal direction around its rotational support shaft 3. 4 is a geared motor as a power source for turning the fin group, 5 is its output shaft, and 6 is a rotating body fitted and fixed to the output shaft 5 of the motor, which in this embodiment has a tongue-shaped body. ing. , 6a is a pressing portion serving as a tip portion of the rotating body 6 in the rotational radial direction. Reference numeral 7 denotes an upper reciprocating rod, which is in the form of an elongated band-shaped plate, and a pressed portion 8 is provided at the center portion of the rod in the longitudinal direction. In this embodiment, the pressed portion 8 is formed by punching the reciprocating rod 7 of the band-shaped plate into a U-shape and bending the inner part of the punch line at right angles. Reference numeral 7' denotes a lower reciprocating rod, which is arranged in a positional relationship with the upper reciprocating rod 7 so as to sandwich the two groups of fins from below and above, respectively. 8° is a pressed portion provided on the lower reciprocating rod 7°. 9
A pair of connecting culms are rotatably connected to both ends of the upper reciprocating rod 7 via a bottle 10, and 12 is an E-ring for stopping the bottle 10. The other end of each connecting culm 9 is provided with a hole through which the rotational support shaft 3 of the fin 2 is inserted, and the fin 2 is inserted through an annular leaf spring 11 for gripping a piece of the rotational support shaft 3. It is engaged with the rotation support shaft 3 of. Reference numeral 13 designates a fin group connecting rod for rotating the two groups of fins in an aligned manner as one group, and 14 represents a connecting bin thereof. As shown in the figure, in this embodiment, the second group of fins is divided into two groups, left and right. Note that, of course, the shape and attachment method of the pressed portion 8 may be modified as appropriate.

FIG. 2 is a side view of FIG. 1, with the side end of the case 1 cut away. Reference numerals 15 and 16 are a pair of electrical contacts for switching on and off the rotation of the motor 4, and the bottle-shaped rotating contact 15 is attached to the outer peripheral end of the rotating body 6, with a part of the circumferential direction Fixed contact 16 in the form of a missing ring
is attached to the outer surface of the casing of the motor 4 coaxially with the motor output shaft 5. The illustration of lead wires for both contacts is omitted.

Other symbols in the figure are the same as those described above.

FIG. 3 is a front view depicting the vicinity of the center of the outlet grille deflection mechanism shown in the above embodiment to help understand the operation of this mechanism, and FIG. 4 is a top view of the connecting culm 9. be. The symbol S in the figure indicates the movement stroke of the reciprocating rod, and θ
indicates the deflection angle of the fin 2.

FIG. 5 is a circuit diagram of a switching circuit for turning on and off the operation of the outlet grille deflection mechanism, in which 40 is an on-vehicle battery power source, 41 is a power switch for the fin rotation motor 4, and 15 and 16 are the aforementioned rotating contacts and fixed contacts, respectively. be.

FIG. 6 is a plan view illustrating a state in which the outlet grille deflection mechanism according to the present invention is attached to an air conditioner incorporated in the driver's side panel of an automobile, and 50 is a main body of the automobile air conditioner. 51 and 52 are the air inlet and outlet of the air conditioning duct 50, 53 and 54 are the blower fan and blower motor, and 55 is a heat exchanger for heating or cooling the air taken in by the blower fan 53 from the inlet 51. , 56 is an air outlet extension duct that connects the air outlet 52 and an air outlet grille 57 that opens toward the interior of the vehicle, 60 and 61 are curved seat cushions, 62 is the vehicle body, and arrows (a) and (b) 2 schematically shows how the blowing direction of air blown out from the blowing grill is deflected.

Next, the operation of the mechanism of the above embodiment will be explained with reference mainly to FIGS. 1 and 3.

After the air conditioning system activation switch (not shown) is turned on,
Turn on the power switch 41 of the motor 4 for rotating the fin 2.
By doing so, the outlet grille deflection mechanism enters the operating state. As the geared motor 4, which has a large rotational torque compared to the R power, rotates, the tongue-shaped rotary body 6 starts to rotate at a slow and constant speed, so the pressing part 6a as the tip part is the third It begins to rotate in the direction indicated by the arrow in the figure. At this time, the upper and lower reciprocating rods 7 and 7°, which are arranged in a positional relationship that sandwich the rotating body 6 from above and below, If the pressed parts 8 and 8° attached to the upper reciprocating rod 7 respectively occupy the positions shown in (A) and ([1) in the figure, the pressing part 6a will move upward as the upper reciprocating rod 7 rotates. After contacting the pressed part 8, the pressing part 6
Since the pressed part 8 is pushed with a force equivalent to the component force t1 of the rotational torque T of the motor 4 exerted on the reciprocating rod 7 in a direction parallel to the reciprocating rod 7, the reciprocating rod 7 is pushed toward the right side in the figure. . When it moves to the position indicated by (a)' in the figure, the position of the pressing part 6a falls as the rotating body 6 rotates, and the contact with the pressed part 8 is released and the reciprocating rod is moved. movement will stop. At this time, the lower part t3 placed in an interlocking relationship with the upper reciprocating rod 7: the pressed part 8° of the reciprocating rod 7° is set in several positions in advance so that it occupies the (opening) position shown in the figure. has been done. When the rotating body 6 continues to rotate further and comes into contact with the pressed part 8' which is stationary at the (B) position, the lower reciprocating rod 7' starts moving leftward in the figure, and the pressed part 8' is stopped at position (B). When the pressing portion 8° reaches the (b)' position, its movement is stopped in the same manner as described above. The upper and lower reciprocating rods 1 and 7 are connected to one fin 2 via each connecting culm 9 connected to the end of each rod, so that they are in an interlocking relationship. , the pressed part of the lower reciprocating rod moves 8° from the (b) position to the (b) position.
The movement to the - position is accompanied by an operation of returning the pressed portion 8 of the upper reciprocating rod from the (A) - position to the (A) position. , Therefore, when the rotating body 6 continues to rotate and returns to the original position indicated by the solid line in the figure, both the upper and lower reciprocating rods 7 and 7°
begins to move to the right again, thus reciprocating rods 7 and 7
This reciprocating motion is repeated periodically. This reciprocating period is determined by the rotational speed of the motor 4, and in addition, by changing the shape of the rotating body 6 to provide a plurality of pressing portions 6a, which is only provided in this embodiment. can also be changed. Furthermore, the movement stroke S of the reciprocating rods 7 and 7'' can be adjusted arbitrarily by increasing or decreasing the rotation radius of the rotating body 6. Both upper and lower reciprocating rods are connected to the connecting culm connected to the ends of the rods. Since the rotational support shaft 3 of the fin 2, which serves as the rotation axis for this fan-shaped rotation, is fixed to the connecting culm 9, the fin 2 also causes a fan-shaped rotation. This will cause the air conditioning air to be deflected in the blowing direction.

The fins 2 other than the fin 2 are aligned and interlocked as one group by the movement of the fin group connecting culm 13 as described above. The deflection angle θ of the fin 2 can be arbitrarily set by changing the reciprocating rod 7 and the 7° movement stroke S or the length of the connecting culm 9.

When it is desired to stop the operation of the blow-off grille deflection mechanism, the power switch 41 of the motor 4 is turned off.
If the rotating contact 15 attached to the motor 4 is in a positional relationship such that the fixed contact 16, which is partially cut out and has an incomplete annular shape, are in contact with each other, the motor 4 is energized through this electrical contact. Therefore, the rotational movement of the fin 2 does not stop immediately.

Only when the rotary contact 15 rotates to the position of the notch (C) of the fixed contact 16 (see FIG. 3), the motor 4 is completely de-energized and the movement of the fin 2 is stopped.

Therefore, by appropriately setting the position of this notch C, the direction of deflection of the second group of fins when the mechanism is at rest can be set, for example, in the front direction or in the direction of deflection of 15 degrees to the right.
It can always be directed in a certain direction. The mounting angle of the flat surface of the fin 2 with respect to the longitudinal direction of the rod of the connecting culm 9 is determined by rotating the fin 2 by hand using the spring force of the clamp gripping leaf spring 11 of the rotation support shaft 3. can be easily changed by

By the way, among the rotational torque T of the motor 4 as the driving force for rotating the twin 2 of the above-mentioned blowout grille deflection mechanism,
The component force in the direction parallel to the reciprocating rod 7 or 7°, which is the effective force for moving the reciprocating rod 7 or 7°, is generated periodically as the rotating body 6 rotates, as described above. However, in the mechanism of the present invention, this component force t has a magnitude of 1+ near its maximum value.
Only when this force [1] is transmitted to the pressed part 8 or 8' through the pressing part 6a and the reciprocating rod is moved, the component force [tl remains at the component force t2 which is smaller than tl. During this period, the rotational force of the motor 4 is not transmitted to the reciprocating rod 7 or 7' at all. It is necessary to continue applying the rotational torque of the motor 4 to the reciprocating rod 22 over the period of time, and in order to ensure the required amount of rotational torque component even near the rotational position where the rotational torque component is the minimum. , it is necessary to use a large motor which is quite wasteful (from the point of view of efficient use of motor rotational force), the rotation noise of the motor increases noticeably, and the deflection mechanism It is possible to eliminate all problems such as the increased level of noise emitted from sliding parts and disadvantages in terms of cost and installation space.

In addition, as a feature of the blowout grill, which is equipped with a mechanism that periodically deflects the blowout direction of the conditioned air with a fan-shaped turning range, for example, as shown in Fig. 6, the wind direction is deflected in the direction of the arrow (A) shown in the figure. (Sometimes the direction of the wind is temporarily fixed), the limited amount of air can be concentrated towards the driver's seat 60 to provide a better feeling of cooling (or a feeling of warmth). Also, when the wind direction is in the direction of the arrow (b), the air S is more effective for the passenger seat 61.
[Effects of the Invention] The outlet grille deflection mechanism of the air conditioner according to the present invention having the above-described structure utilizes a motor that serves as the motive force for giving rotational motion to the group of wind direction deflection fins. Of the rotational torque, the rotational force of the motor is transmitted to the reciprocating rod only when the component force in the direction parallel to the moving direction of the reciprocating rod, which is a force that effectively rotates the fin group, reaches a maximum value. At other times, the motor is placed in a no-load state, so there is a margin in output to continue applying the necessary pressing force to the reciprocating rod even when the above-mentioned parallel component force is at its minimum, as in the conventional mechanism. The inconvenience of having to use a relatively large motor is eliminated, and it becomes possible to use a sufficiently small output motor, which significantly reduces the level of motor noise and noise generated from the sliding parts of the mechanism. be able to.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a blowout grille with a built-in wind direction deflection mechanism according to the present invention, with a part of the case cut away, Fig. 2 is a side view of Fig. 1, and Fig. 3 is the same as Fig. 1. 4 is a top view of the connecting culm, FIG. 5 is an electrical circuit diagram for operating the outlet grille deflection mechanism, and FIG. 6 is the outlet shown in FIG. 1. FIG. 7 is a plan view illustrating a state in which the grill is assembled to an air conditioner of an automobile, and FIG. 7 is a plan view showing an example of a conventional blow-off grill deflection mechanism. ′

Claims (1)

[Claims] 1) An air conditioner that converts the rotational motion of a rotating device into reciprocating motion via a link and transmits it to a wind deflection plate of a grill, and rotates the deflection plate around its rotational axis. In the blow-off grille deflection mechanism, the link includes: a rotating body having a pressing portion and attached to a rotating shaft of the rotating device; a reciprocating rod having a pressed portion pressed by the pressing portion; a connecting rod that transmits the movement of the moving rod to the wind direction deflection plate, and a rotational position at which a component force in a direction parallel to the reciprocating rod of the rotational torque exerted on the pressed part by the rotating device has a maximum value. A blowout grill deflection for an air conditioner, characterized in that, when the pressing portion reaches nearby, the pressing portion presses the pressed portion and causes the reciprocating rod to perform reciprocating motion. mechanism. 2) The outlet grill deflection mechanism for an air conditioner according to claim 1, wherein the reciprocating rod comprises a pair of rods for forward and backward rotation of the wind direction deflection plate.