JPH0731080Y2 - Air blower blade drive device in air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a blowing blade drive device in an air conditioner.

(Prior Art) In a general air conditioner, a blowing blade provided at an air outlet is reciprocally rotated to continuously change the blowing air flow within a predetermined angle range (that is, the blowing air flow (Swing control is performed), so that it is attempted to satisfy the air-conditioning request of the indoor occupants. When performing the swing control of the blowout airflow, a power transmission mechanism for transmitting the motor rotational force as the reciprocating rotary force of the blowoff blade is provided between the swing shaft of the blowoff blade and the rotation shaft of the motor that is the drive source. It is necessary to intervene, and various mechanisms have been devised conventionally. For example, as disclosed in Japanese Patent Laid-Open No. 63-194150, a motor that is a drive source is installed so that the rotation axis of the motor and the swing axis of the blowing blade are parallel to each other, and Between a crank shaft connected to the swing shaft of the blade and the motor rotation shaft, a short link pivotally attached to the motor rotation shaft and a long link connecting the end of the short link to the crank shaft are provided. It is known that an intervening link mechanism is interposed.

(Problems to be Solved by the Invention) When the power transmission mechanism interposed between the crankshaft and the motor is composed of two long and short links as in the above-mentioned known example, the swing angle and the swing speed of the blowing blades. (In other words, the swing control mode) is unavoidably constant, and there are cases in which the user's various demands cannot be met.

The present invention has been made in view of the above points, and an object of the present invention is to make it possible to change the swing angle and the swing speed of the blowing blade into two types according to the user's request.

(Means for Solving the Problem) In the invention of claim 1, as a means for solving the above-mentioned problems, as shown in the drawings, an outlet provided in the air outlet 5 of the air conditioner so as to be reciprocally rotatable. A power transmission mechanism 19 provided between a crankshaft 14 connected to a swing shaft 16 of the blade 12 and a motor 18 that is a drive source of the blowout blade 12 is provided on a rotary shaft 18a of the motor 18. A rotatably and detachably supported cam disk 20, and a link that engages with the cam disk 20 and transmits the rotational force of the motor 18 to the crankshaft 14 as a reciprocating motion.
22 and the front and back sides of the cam board 20.
Two types of cam grooves 21a and 21b having different shapes are formed on the surface, respectively, with which the engaging pins 23 projecting from the ends of the links 22 are engaged.

According to a second aspect of the invention, as a means for solving the above-mentioned problems, as shown in the drawings, in the blowing blade drive device for an air conditioner according to the first aspect, the motor 18
Is housed and arranged in the motor case 17, and the motor case 17 is integrally formed with a guide portion 17b for guiding the link 22 during the reciprocating operation.

(Operation) According to the inventions of claims 1 and 2, the following operation is obtained by the above means.

That is, the crankshaft 14 connected to the swing shaft 16 of the blowout blade 12 rotatably and reciprocally provided at the air outlet 5 of the air conditioner.
And a motor 18 serving as a drive source of the blowoff blade 12, the power transmission mechanism 19 is provided between the rotary shaft 18a of the motor 18.
And a cam disk 20 that is co-rotatably and detachably pivotally supported on the cam disk 20, and a link 22 that engages with the cam disk 20 and transmits the rotational force of the motor 18 as reciprocating motion to the crankshaft 14. The links 22 are provided on the front and back sides of the cam board 20.
By forming the two types of cam grooves 21a, 21b having different shapes into which the engaging pins 23 projecting from the ends of the cams are respectively formed, the cam pivotally supported on the motor rotating shaft 18a. If the mounting state of the board 20 is turned upside down, the blowout blade 12 is reciprocally rotated by two kinds of swing angles and speeds by the engagement of the cam groove 21a or 21b and the engagement pin 23.

According to the second aspect of the invention, the following effects can be obtained by the above means.

That is, in the blowing blade drive device for an air conditioner according to claim 1, the motor 18 is housed and arranged in the motor case 17, and the motor case 17 is integrally provided with a guide portion 17b for guiding the link 22 during reciprocating operation. The link formed when the rotational force of the motor 18 is transmitted to the swing shaft 16 (specifically, the crankshaft 14) of the blowoff blade 12 is formed by
A part of the motor case 17 can also serve as the reciprocating operation guide 22.

(Effect of the Invention) According to the inventions of claims 1 and 2, the swing shaft of the blowing blade 12 provided at the air outlet 5 of the air conditioner so as to be reciprocally rotatable.
A power transmission mechanism 19 provided between a crankshaft 14 connected to 16 and a motor 18 which is a drive source of the blowoff blade 12.
A cam disk 20 that is rotatably and removably supported by a rotary shaft 18a of the motor 18, and the rotational force of the motor 18 is transmitted to the crank shaft 14 as a reciprocating motion by engaging with the cam disk 20. And a cam 22.
Two kinds of cam grooves 21a and 21b having different shapes are formed on the two front and back surfaces of 20 so that the engaging pins 23 protruding from the ends of the links 22 are engaged
The motor rotating shaft 18a
By reversing the mounting state of the cam board 20 pivotally supported with respect to the front and back, the blowout blade 12 is reciprocated at two swing angles and speeds due to the engagement between the cam groove 21a or 21b and the engagement pin 23. Since the dynamic control is performed, there is a practical effect that the blown air flow distribution can be obtained according to the indoor condition or the user's request. Also, a cam board
By forming a cam groove 21a or 21b into which the engaging pin 23 protrudingly provided at the end of the link 22 is engaged, the rotational force of the motor 18 is applied to the cam groove 21a or 21b and the engaging pin. Since the reciprocating motion of the link 22 is transmitted by engaging with the link 23, the link 22 and the cam disk 20 are not rigidly connected to each other, and the swing shaft of the blowing blade 12 is formed.
Even if a dimensional error occurs at the 16 mounting positions, the dimensional error can be absorbed.

According to the invention of claim 2, in the blowing blade drive device for an air conditioner according to claim 1, the motor 18 is housed and arranged in the motor case 17, and the motor case 17 is also arranged.
When the rotational force of the motor 18 is transmitted to the swing shaft 16 (specifically, the crankshaft 14) of the blowout blade 12 by integrally forming the guide portion 17b that guides the link 22 during the reciprocating operation. Reciprocating operation guide of link 22 in motor case
Since it can be shared by a part of the motor 17, the motor 18, the cam disk 20, and the link 22 can be housed and arranged in the motor case 17 in an assembled state.
There is a practical effect that it is possible to improve the accuracy of (specifically, the connection relationship between the cam board 20 and the link 22) and greatly contribute to the management of parts and the simplification of the assembly man-hours.
Further, according to the invention of claim 2, since the motor 18 is covered and protected by the motor case 17, there is an effect that it is possible to prevent dust and the like from adhering to the motor 18.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. This embodiment corresponds to the inventions of claims 1 and 2.

As shown in FIG. 4, the air conditioner of the present embodiment has an air conditioner body 1 installed above an opening 3 of an appropriate size formed in a ceiling C, and a lower surface of the air conditioner body 1. A decorative panel 2 that is abutted and coupled to cover the opening 3 and has four air outlets 5,5,5,5 formed in the decorative panel 2 for warm air or cold air. It is designed to blow W in all directions. Reference numeral 4 is an air suction port, 6 is a fan, 7 is a fan motor, 8 is an air heat exchanger, 9 is a drain pan, 10 is a suction grill disposed in the air suction port 4, 11 is an air filter, and 12 is an air blower. A blowing blade for adjusting the wind direction, which is arranged at the outlet 5, and a hanging bolt 13 for hanging the air conditioner body 1.

In the case of the present embodiment, as shown in FIG. 5, the four air outlets 5, 5 ... The blow-off blades 12, 12 ... for adjusting the wind direction of are respectively swingably supported.

And the swinging shafts 16 and 16 of the adjacent blowing blades 12 and 12 ...
Are connected via the crankshafts 14, 14, 14 except for a pair, and the corners of the decorative panel 2 which are both ends of one blowing blade 12 should be connected to the crankshafts 14, 14. Motor units 15 and 15 each having a motor 18 (see FIGS. 1 to 3) are provided. In the case of the present embodiment, the swing shaft 16 on one side of the blowing blade 12 sandwiched between the motor units 15 and 15 is rotatable with respect to the blowing blade 12, whereby the motors 18 and 18 are The interference of the driving force is avoided.

Then, referring to FIG. 1 to FIG. 3, the motor unit
The structure of 15 will be described in detail.

The motor unit 15 is a motor case with an open bottom.
The motor 18 and the power transmission mechanism 19 are housed in the housing 17, which has the following structure.

That is, the motor 18 has its rotating shaft 18a directed vertically downward (in other words, a direction orthogonal to the swing shaft 16 of the blowing blade 12).
Is installed in the motor housing portion 17a of the motor case 17 in such a state that the power transmission mechanism 1 is attached to the rotary shaft 18a.
A disk-shaped cam disk 20 forming a part of 9 is pivotally attached so as to be rotatable and detachable.

There are two types of cam grooves with different shapes on the front and back sides of the cam board 20.
21a and 2b are formed respectively. These cam grooves 21
The shapes of a and 21b are designed so that the desired two kinds of swing angles and swing speeds of the blowing blades 12 can be obtained. The cam grooves 21a, 21b are selectively engaged with an engagement pin 23 projecting downward at the other end of a link 22, one end of which is engaged with the crankshaft 14. There is. That is, when the cam disk 20 is pivotally supported with respect to the motor rotation shaft 18a, if the front side cam groove 21a is directed upward,
The engagement pin 23 will be engaged with the cam groove 21a, while the engagement pin 23 will be formed if the back side cam groove 21b is directed upward.
Is to be engaged with the cam groove 21b. Reference numeral 24 is an engaging recess formed to engage the crankshaft 15 with one end of the link 22. Therefore, the motor
The rotational force of 18 is converted into reciprocating motion of the link 22 via the cam groove 21a or 21b of the cam disk 20, and then transmitted as a force for reciprocally rotating the crankshaft 15. That is, in this embodiment, the power transmission mechanism 19 is configured by the cam board 20 and the link 22.

Further, the motor case 17 is integrally formed with a guide portion 17b that guides the link 22 so as to move back and forth.
That is, in this embodiment, the motor 18 is the motor case 17
On the other hand, it is housed together with the power transmission mechanism 19 into a unit.

Reference numeral 25 is a groove for inserting the crankshaft formed on both sides of the guide portion 17b of the motor case 17, 26 is a screw for attaching the motor 18 to the motor case 17, 27 is a cam plate 20 fixed to the motor rotating shaft 18a. A screw for preventing rotation, 28 is a lead wire.

With the above-described configuration, the attachment state of the cam disk 20 pivotally supported on the motor rotation shaft 18a is reversed so that the blowout blade 12 is engaged with the cam groove 21a or 21b and the engagement pin 23. Depending on the combination, the reciprocating rotation is controlled by two kinds of swing angles and swing speeds, and it is possible to obtain the blown air flow distribution corresponding to the indoor condition or the user's request. Also,
In the case of the present embodiment, the speed in the vertical direction (in other words, the direction orthogonal to the blowoff blade 12) at the motor installation location is suppressed to a small level, and the rotational force of the motor 18 is applied to the swing shaft 16 of the blowoff blade 12. When transmitting as reciprocating power of, the link 22 is to be reciprocated only in the direction orthogonal to the motor rotation shaft 18a (that is, in the direction orthogonal to the swing shaft 16 of the blowing blade 12). The motor installation space and the operation space of the power transmission mechanism 19 can be significantly reduced, which greatly contributes to the thinning of the decorative panel 2. Further, even if the motor 18 is to be positioned outside the air conditioner body 1, the motor case
Since it is housed inside 17, adhesion of dust and the like is prevented. Further, as in the power transmission mechanism 19 of the present embodiment, when the cam disk 20, the link 22 and the crankshaft 14 are configured to be connected in an engaging relationship,
As shown in FIG. 3, the engaging recess of the crankshaft 14 and the link 22
Even if the engagement positional relationship with 24 is slightly deviated vertically, the deviation can be absorbed and the swing angle of the blowing blade 12 can be kept constant.

In the above description, the ceiling-embedded air conditioner is taken as an example, but the present invention is also applicable to other types of air conditioners.

The present invention is not limited to the configuration of the above-mentioned embodiment, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

[Brief description of drawings]

1 is an exploded perspective view of a motor unit in an air conditioner according to an embodiment of the present invention, FIG. 2 is a bottom view of the motor unit shown in FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. 4 is a vertical sectional view of an air conditioner according to an embodiment of the present invention, and FIG. 5 is a top view of a decorative panel in the air conditioner shown in FIG. 5 ... Air outlet 12 ... Blow-off blade 14 ... Crank shaft 16 ... Rotating shaft 17 ... Motor case 17b ... Guide part 18 ... Motor 18a ... Rotating shaft 20 ... Cam disk 21a, 21b ... … Cam groove 22 …… Link 23 …… Engagement pin

Claims (2)

[Scope of utility model registration request] 1. A crankshaft (14) connected to a swing shaft (16) of a blowout blade (12) rotatably and reciprocally provided at an air blowout port (5) of an air conditioner, and the blowout blade. A power transmission mechanism (19) interposed between a motor (18) serving as a drive source of (12) is rotatably and detachably supported together with a rotation shaft (18a) of the motor (18). And a link (22) which engages with the cam disk (20) and transmits the rotational force of the motor (18) as reciprocating motion to the crankshaft (14). Two kinds of cam grooves (21) having different shapes are formed on the front and back surfaces of the cam disk (20) so that the engaging pins (23) projecting from the ends of the links (22) are engaged.
A blower blade drive device in an air conditioner, characterized in that a) and (21b) are formed respectively. 2. A motor case (17) for the motor (18).
The air conditioner according to claim 1, wherein the motor case (17) is integrally formed with a guide portion (17b) for guiding the link (22) during a reciprocating operation while being housed inside. Blower blade drive device in the machine.