JPS60117043A - Air flow direction changing device - Google Patents

Abstract

PURPOSE:To obtain an air flow direction changing device which is inexpensive in cost and performs a positive operation as it satisfies conditions necessary for the operation by automatically carrying out change of air flow by means of a drive motor and a speed reduction mechanism and stopping the device at its upper limit position or its lower limit position. CONSTITUTION:In a case where a manual switch 21 is closed, when a such up temperature is lower than a set value, a movable contact (c) of a thermostat 20 comes into contact with a movable contact (b) thereof, and power is supplied to a motor 1 through a upper limit position detecting microswitch 18. Accordingly, when a damper 14 is not in the upper limit position (a cool air blow-off position), the damper 14 makes an arcuate motion around a stationary shaft 16 through a gear box 12 and the like and reaches the upper limit position, thus opening the contact of the microswitch 18 and stopping. When the blow-off temperature rises higher than the set temperature from this state, the movable contact (c) of the thermostat 20 comes into contact with the stationary contact (a), and power is supplied to the motor 1 through a lower limit detecting microswitch 17, and the damper 14 reaches the lower limit position (hot air blow-off position) and comes to a stop.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wind direction changing device that is installed at an air outlet or the like of an air conditioner and changes the direction of the wind downward toward the intestines.

2. Description of the Related Art Conventionally, during heating operation of an air conditioner, the blowing direction is changed by operating a damper downward when the blowing temperature is high and horizontally when the blowing temperature is low. Regarding the drive of the damper in this case, it is necessary to operate the damper in a substantially horizontal direction or substantially downward by the operation of the Suita temperature detection thermostat, and to maintain it in that position. In this case, it is necessary to satisfy conditions such as quiet operating noise and the possibility of manual operation by switching from the self-U button to manual operation.

For this reason, conventionally, for example, Utility Application No. 54-102828 (
As in Japanese Utility Model Application No. 56-L21149), a stepping motor is used to reciprocate the wind direction changing device.

Problems to be Solved by the Invention However, since the stepping motor requires complicated control, the drive control is performed by a microcomputer, resulting in an expensive problem.

In view of these points, the present invention provides a wind direction changing device that is inexpensive and operates reliably while satisfying the conditions necessary for operation.

The present invention is a means to solve the problem! A deceleration mechanism driven by a motor is provided in the deceleration mechanism, and a link mechanism is provided on the output shaft of the deceleration mechanism to convert the rotational motion of the output shaft into circular arc motion, and the output shaft of the link mechanism is connected to the A position detecting means is provided which is connected to a wind direction changing plate rotatably provided at the air outlet and detecting a -1- limit position and a lower limit position of the movement locus of the wind direction changing plate, and this position detecting means allows the drive This is designed to stop the motor.

With this configuration, the wind direction changing plate rotates so that cold air lower than a predetermined value is blown upward and hot air higher than a predetermined value is blown downward, depending on the blowing temperature.

``Embodiment'' The present invention will now be described with reference to the accompanying drawings showing one embodiment of the invention.

First, the external configuration will be explained with reference to FIG.

In the figure, reference numeral 1 denotes an AC motor, for example, an inductor type synchronous motor, which is housed in a gear box 12 containing a reduction mechanism and a slip mechanism, and an output shaft 2 protruding from the gear box 12 has a crank shape. I am doing it. Reference numeral 14 denotes a damper that is installed at the outlet (none of which is shown) of the main body of the air conditioner and changes the direction of the outlet air.This damper is equipped with a fixed shaft 16 and an arcuate motion shaft 16. is rotatably fixed at a fixed position by a bearing 17 as shown in FIG. The tips of the crank portions of the arcuate movement shaft 1ts and the output shaft 2 are rotatably locked to the connecting rod 13, respectively. 19 is a microswitch having a normally closed contact for detecting the lower limit position of the movement trajectory of the damper 14, and 18 is a microswitch having a normally closed contact for detecting the upper limit position.

In the mechanism configuration as described above, when the output shaft 2 rotates, the damper 14 is activated by the microswitches 19 and 18.
An arcuate motion is performed around the fixed shaft 16 until the operating point is reached. The rotation of the output shaft 2 and the arcuate movement of the damper 14 will be described in detail later in FIG.

Next, referring to FIG. 2, the reduction mechanism and the slip mechanism will be explained in particular. Components that are the same as those in FIG. 1 are given the same numbers and their explanations will be omitted.

In FIG. 2, 3 is the output gear of the motor, which successively meshes with a first gear 4, a second gear 6, a third gear 6, and a fourth gear 7, which are integrally formed of a small gear and a large gear, and a final output gear 8.
It meshes with the. These reduction teeth IIL are such that the first gear 4 and the third gear 6 are connected to the gear shaft 11, and the second gear 6 and the fourth gear
A gear 7 is rotatably attached to a gear shaft 10. Further, the output tooth medium 8 is rotatably housed on the output shaft 2 and receives spring pressure from a disc spring 9 fixed to the output shaft 2.

Then, when power is supplied to the motor 1, the motor output gear 3 starts rotating, and the first gear 4, second gear 5, third gear 6, fourth gear 7, which are meshed with the motor output gear 3 start rotating. Output gear 8
rotate while being sequentially decelerated. Here, if the friction torque between the output gear 8 and the disc spring 9 is set to be larger than the normal load torque, the disc spring 9 is fixed to the output shaft 2, so the output shaft 2 is It starts rotating, and then the connecting rod 13 and damper 14 start moving. 'Furthermore, if a human hand applies a force greater than the friction torque between the output gear 8 and the disc spring e to the damper 14, a slip will occur between the output gear 8 and the disc spring 9, causing the output gear to rotate 80 times. Regardless, the output shaft 2, connecting rod 13, and damper 14 move and can be moved to any desired position. Of course, even if power is not supplied to the motor 1 and the motor 1 is stopped, the damper 14 can be similarly moved to any desired position. Furthermore, at this time, since the motor 1 is stopped, even if a person removes his/her hand, the frictional force between the projecting gear 8 and the disc spring 9 overcomes gravity and maintains the position.

Here, the reduction gear is set to four stages, but the number of gear teeth or the number of reduction gear stages may be determined based on the required rotational speed of the output shaft 2 and the north of the generated rotational speed of the motor 1, that is, the reduction ratio.

Next, according to Fig. 3, the output shaft 2, connecting rod 13, damper 1
The operation No. 4 will be explained. Components that are the same as those in FIGS. 1 and 2 are designated by the same numbers, and the description thereof will be omitted.

The mechanism shown in the figure is a four-section rotating mechanism, and the damper 14 is
The limit position is the crank part of output +Ii+I+ 2 and connecting rod 1
3 is the position where it is extended in a straight line, and the output shaft 2, the connecting rod 13, and the arc motion axis 16 are shown by solid lines, and the damper 14 takes an angle determined by the arc motion axis 15 and the fixed shaft 16. . At this time, the upper limit position detection microswitch 18 is operating. From this upper limit position, for example, output 4
When III+2 rotates counterclockwise, the connecting rod 13 moves downward in the figure, and the arc movement ZJli11+15 is pulled in the C direction, causing the damper 14 to move 1,! jl constant 1llllI
It moves in a downward arc around 116. Then, the output shaft 2' and the connecting rod 13' gradually approach the upper limit position in the straight line to the east, and reach this lower limit position, and the arc movement 11i+1
+ 1ts' stops, and the damper 14' moves along the arc motion axis 1
6' and the fixed axis 16. At this time, the lower limit position detection microswitch 19 is operating. In addition,
The upper limit position detection microswitch 18 returns when the damper 14 starts to move and deviates from the upper limit position.

If the output shaft 2' further rotates counterclockwise from the lower limit position,
In the figure, the connecting rod 13' moves in one direction, and the arcuate movement shaft 15' and damper 14' move toward the upper limit position. At this time, the lower limit position detection microswitch 19 returns to its original position when the damper 14' is out of the lower limit position.

Finally, the electric circuit will be explained with reference to FIG.

Here again, as mentioned above, the same parts as in FIGS. 1 to 3 are given the same numbers and their explanations will be omitted.

In the figure, the microswitches 18 and 19 for detecting the upper limit position and the lower limit position are connected in parallel with one end of their normally closed contacts and connected to one end of the motor 1, and the other end is connected to the blowout temperature of the thermostat 2o for detecting the blowout temperature. When is low, movable contact C
The movable contact C is connected to a fixed contact a that contacts the airflow direction and a fixed contact a that contacts the movable contact C when the Suita temperature is high, and the movable contact C is connected to a manual operation switch 21 having a contact that opens when manually changing the wind direction. connected to one end.

In such a connection, AC power is applied to the other end of the motor 1 and the other end of the manual operation switch 21.

- In the circuit configuration as explained above, when the manual switch 21 is closed, when the Suita temperature is lower than the set value,
When the movable contact C of the thermostat 20 contacts the fixed contact, the motor 1 is energized through the upper limit position detection microswitch 18. Therefore, if the damper 14 is at the upper limit position (cold air blowing position), the microswitch 18 is operating as described above, the contacts are open, no electricity is applied to the motor 1, and the damper 14 is at the upper limit position. hold m.

Therefore, the cold air is blown in one direction.

When the damper 14 is not in the 1st position, the microswitch 18 is in the reset position as described above, and the contacts are closed, so the motor is energized and the damper 14 is in the 1st position.
When the first limit position is reached, the contact of the microswitch 18 is
: It operates until it becomes l.

From this state, when the Suita temperature rises above the set value, the thermostat 2o operates, the OffilJ contact C comes into contact with the fixed contact a, and the motor 1 is energized through the lower limit position detection microswitch 19. At this time 1, since the damper 14 is at the upper limit position, the contact of the microswitch 19 is closed as described above, the motor 1 rotates, the damper 14 starts moving, and reaches the lower limit position (warm R blowout position). When the lower limit position is reached, the microswitch 19 operates to open the contact and the remoter 1 is de-energized, and then stops when the lower limit position is reached. Therefore, the warm air is blown downward.

Note that when the manual operation switch 21 is opened, the motor 1 is not energized at all and does not rotate, so if the damper is manually moved to an arbitrary position, that position is maintained.

Therefore, the direction of the air blown out from the air outlet of the air conditioner can be controlled using the inexpensive AC motor 1, and the control circuit is also extremely simple.Furthermore, the operation of changing the air direction is not a shocking operation but an arbitrary one. Can be designed with operating speed,
A wind direction changing device that performs the intended operation is obtained.

In this embodiment, a four-bar rotation mechanism is shown as a mechanism for converting the circular motion of the output shaft 2 into a circular arc motion of the damper 14, but a grooved cam may also be used, and a disc spring 9 may be used as a slip mechanism.
However, it goes without saying that the same effect can be obtained by using a coil spring or an electromagnetic type. Furthermore, although microswitches 18 and 19 are shown for detecting the − limit and lower limit positions, the output +li+j 2
Similar effects can be obtained by using a switch that operates a contact point by providing a cam on the switch, or by using a non-contact switch such as a reed switch. Also, thermostat 2
0 may be one that detects the pipe temperature of the refrigeration cycle and operates.

"Effects of the Invention" - As is clear from the examples described above, the air conditioner wind direction changing device according to the present invention automatically changes the wind direction using a drive motor and a deceleration mechanism, and stops at the upper limit position or lower limit position. Because of this configuration, the [ν control circuit can be simplified compared to the conventional structure using a stepping motor, and the wind direction can be changed gradually using a deceleration mechanism, which provides a better experience. It has the following advantages.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic configuration diagram of the entire wind direction changing device of an air conditioner according to an embodiment of the present invention, and Fig. 2 is a cross section of the power transmission portion from the motor to the damper in the wind direction changing device. A structural diagram, FIG. 3 is an explanatory diagram of the operation from the output shaft to the damper microswitch in the air direction changing device, and FIG. 4 is a disconnection electrical circuit diagram of the air direction changing device. 1...Motor, 2...Output shaft, 3...
River/motor output gear, 4...1st gear, 6...
...Second gear, 6...Third gear, 7...
... 4th gear, 8. Mountain... Output gear, 9...
Disc spring, 12...Gearbox, 13・Mountain...
Connecting rod, 14... Damper, 16...
Circular motion axis, 16...Fixed axis, 17...
・Fixed shaft bearing, 18...Micro switch for detecting upper limit position, 19...Micro switch for detecting lower limit position. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1θ 7 Figure 2 4 Figure 3 8 Figure 4

Claims (1)

[Claims] A deceleration mechanism driven by a drive motor is provided, and a link mechanism is provided on the output shaft of the deceleration mechanism to convert the rotational motion of the output shaft into circular arc motion, and the output shaft of this link mechanism is connected to the output shaft of the air conditioner. Same as the air outlet! A position detecting means is provided which is connected to the wind direction changing plate which is freely provided in IiI, and which detects the upper limit position and the limit position of the movement trajectory of the 1JIIi￥Q wind direction changing plate, and this position detecting means is used to control the operation of the drive motor. A device for changing the wind direction of an air conditioner that stops the operation.