JPH0921546A - Air conditioner embedded in ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner embedded in the ceiling, wherein a driving system for raising and lowering a suction grille is arranged along a path for sucking air so as not to inferfere with the path. SOLUTION: An air conditioner embedded in the ceiling is provided with a decorative panel having an opening opened to a ceiling-plane and supports a suction grille on an underface of the decorative panel in a vertically movable manner. Two areas 190A, 190B, which extend leaving an area 170 necessary for introducing air, are provided in the opening of the decorative panel 7, and a driving system 150 for moving up and down the suction grille is arranged in one area 190A, while an electrical components case 160 is disposed in the other area 190B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a suction grill of a ceiling-embedded air conditioner having a unit body installed on the ceiling.

[0002]

2. Description of the Related Art In general, there is known a ceiling-mounted air conditioner in which a suction grill is provided on a decorative panel installed on a ceiling, and a filter is provided on the suction grill (Japanese Patent Laid-Open No. 2-2339).
20 publication). This type of filter has an advantage that the filter can be removed by removing the suction grille from the decorative panel, so that the work of attaching and detaching the filter at the time of cleaning the filter is simplified as compared with the previous one. .

[0003]

However, in the ceiling-embedded air conditioner, the decorative panel and the suction grill are naturally installed on the ceiling, and therefore the above-described work for removing the suction grill is performed at a high place. Therefore, even if the filter is easily attached and detached, there is a problem that the filter is not exchanged so often and the operation is continued without sufficiently exhibiting the performance of the air conditioner.

In order to solve this problem, it is conceivable to support the suction grill so that the lower surface of the decorative panel can be moved up and down by using a lifting motor. Then, when replacing the filter, the suction grill can be lowered to a low place, so that the filter can be replaced in a low place. In the case of the above structure, a drive system for raising and lowering the suction grill is required, and therefore this drive system must be arranged in the suction path of the air conditioner so as not to become a resistance.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to arrange a ceiling-mounted air conditioner in which a drive system for raising and lowering a suction grill is arranged in the suction path so as not to become a resistance. To provide.

[0006]

According to a first aspect of the present invention, there is provided a ceiling embedded type having a decorative panel having an opening opening to a ceiling surface, and a suction grill supported on a lower surface of the decorative panel so as to be vertically movable. In the air conditioner, two areas extending while leaving an area required for air intake are provided in the opening of the decorative panel, and a drive system for moving up and down the suction grill is provided in one area. It is characterized in that the electric equipment box is arranged in the other area.

According to a second aspect of the present invention, in the first aspect, the drive system for raising and lowering the suction grill is fixed to the decorative panel, and the electrical equipment box is fixed to the unit body. It is a thing.

The invention described in claim 3 is the invention according to claim 1 or 2.
In the structure described in (1), the opening has a substantially rectangular shape, and the two areas are provided at positions on opposite sides of the opening.

[0009]

According to the invention as set forth in claim 1, the opening of the decorative panel is provided with two areas extending while leaving an area necessary for taking in air, and one area is provided with suction. A drive system for raising and lowering the grill is arranged,
By disposing the electric equipment box in the other area, the drive system and the electric equipment box can be arranged so as not to become a resistance in the suction path of the air conditioner.

According to the second aspect of the present invention, the drive system for raising and lowering the suction grill is fixed to the decorative panel, and the electrical equipment box is fixed to the unit body, so that maintenance of the drive system is required. Just remove the makeup panel,
You can do it.

According to the third aspect of the present invention, the two areas are provided on opposite sides of the opening, and the blower is arranged in the central portion. Therefore, the drive system and the electrical equipment are provided in the suction path of the air conditioner. The box and the box can be arranged so as not to resist.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a vertical cross-sectional view of a general ceiling-embedded air conditioner. In FIG. 4, reference numeral 50 indicates an air conditioner. This air conditioner 50 has a ceiling interior 1
A decorative panel 7 provided on a ceiling surface 6 so as to have a suction port 3 in the center and air outlets 4 on four sides of an outer periphery and to cover a ceiling hole 5; And a suction grille 9 having an intake port 8.

Reference numeral 10 denotes a blower comprising a turbo fan 11 and a fan motor 13 mounted on a top plate 12, 14 denotes a nozzle port for guiding the indoor air from the intake port 8 to the turbo fan 11, and 15 denotes an inner rising part 15a. And a drain pan 16 having an outer rising portion 15b and formed of styrofoam in an angular ring shape, and 16 is a plate fin type heat exchanger annularly arranged on the discharge side of the turbofan 11 so as to surround the fan. is there. Reference numeral 17 denotes a heat insulating material wound around the peripheral surface of the unit body 2, reference numeral 21 denotes a baffle for guiding the air exchanged by the heat exchanger 16 to the outlet 4, 22.
Is a suspension bolt for suspending the unit body 2 from the ceiling beam with a suspending tool, and 24 is a filter attached to the downstream side of the suction grill 9.

The main portion of this embodiment will be described with reference to FIGS. 1 to 3. The suction grill 9 is supported by four suspension cords 31 so as to be able to move up and down. As the four suspension strings 31, a resin wire or a metal wire having a vinyl coating on the outer periphery is used, but a dial code may be used. As shown in FIG. 3, one end 31a of the four hanging strings 31 is connected to the hook 90a of the suction grill reinforcing member 90, and the other ends 31b of the two hanging strings 31 of the four hanging strings 31 are The other ends 31c of the remaining two hanging strings 31 are respectively wound around the main pulley 100A, and the rope guide 20
0 or an auxiliary pulley (not shown) through the main pulley 10
They are wound around 0B respectively.

In order to connect the one end 31a of the hanging cord 31 to the hook 90a of the suction grille reinforcing member 90, as shown in FIG. Hook part 31d of hook 90
After hooking it on a, the hanging string 31 may be pulled in the direction of the arrow and lightly tightened.

The suction grill reinforcing member 90 is fixed to the two sides of the suction grill 9 with screws or the like, and as described above, functions as a hook for the four hanging strings 31.
It also serves to reinforce the suction grille 9 and to prevent the filter 24 (FIG. 4) mounted on the suction surface of the suction grille 9 from laterally shifting.

A total of four main pulleys 100A, 100B
Are connected to both ends of the shaft 110 one by one, as shown in FIG. A hole is formed in each of the main pulleys 100A and 100B.
A and 100B are loosely fitted to the shaft 110 so as to freely rotate. A fixed portion 120 is fixed to the shaft portion of the shaft 110 via a plurality of screws or the like, and a rotational force transmitting means (such as a coil spring, a plate spring, or an electromagnet) is provided between the fixed portion 120 and the main pulleys 100A and 100B. Hereinafter, it is referred to as “coil spring”.) 130 is interposed. Reference numeral 125 denotes a ring that rotates freely. When the weight of the suction grille 9 is applied to the four suspension strings 31, the fixed portion 12 is fixed via the coil spring 130.
0, the main pulleys 100A and 100B, and the ring 125 are integrated, and the four suspension strings 31 are fed out / rewinded with the rotation of the shaft 110. Then
When an excessive load is applied to the four hanging strings 31, the main pulleys 100A, 10A are resisted against the spring force of the coil spring 130.
0B runs idle.

Further, according to this embodiment, the suction grill 9
1, a drive system 150 for moving up and down, that is, a drive system 150 including the above-described main pulleys 100A and 100B, the shaft 110, a clutch including the rotational force transmitting means 130, a suction grill lifting motor 140 described later, and the like is shown in FIG. Thus, they are collectively arranged on the support plate 151 extending into the opening of the unit body 2.

This support plate 151, as shown in FIG.
The drive system 150 is fixed to the decorative panel 7 and the drive system 150 is fixed to the decorative panel 7 side. An electrical box 160 for controlling the present air conditioner extends in the opening of the unit body 2 so as to face the support plate 151. The electrical equipment box 160 and the support plate 151 extend into the so-called air intake opening of the unit body 2, but their presence does not detract from the air intake function. The remaining space 170 is formed so that air can be sufficiently taken in. While the drive system 150 described above is fixed to the decorative panel 7 side, this electrical equipment box 160 is fixed to the unit body 2 side.

In short, according to this embodiment, two areas 190A and 19 that extend in the opening of the decorative panel 7 leaving an area (space 170) necessary for air intake.
0B is provided, a drive system 150 for moving up and down the suction grille 9 is arranged in one area 190A, and an electric equipment box 160 is arranged in the other area 190B. Therefore, the drive system 150 is also installed in the electric equipment box 160. However, the suction resistance by the turbofan 11 of the blower 10 located in the space 170 does not occur, and even if they are arranged, the suction efficiency of the air conditioner can be sufficiently maintained.

Further, according to this embodiment, the decorative panel 7
The opening is substantially rectangular, and the above two areas 190A and 190B are provided at positions opposite to the opening of the decorative panel 7. According to this, the drive system 1
It is clear that neither 50 nor the electrical equipment box 160 will be a suction resistance by the turbofan 11 (see FIG. 1) of the blower 10 located in the space 170.

The drive system 150 will be described in more detail. The shaft 110 includes two bearings 15 on a support plate 151.
It is rotatably supported via 2.

A gear 153 is fixed to substantially the center of the shaft portion of the shaft 110, and the gear 15 has a gear 153.
4, the gear 154 is fixed to the output shaft of the suction grille elevating motor 140 described above. Reference numeral 141 is a motor capacitor, and 143 is a timer (for correction).

To raise and lower the suction grille 9, a pull switch 51 is provided with reference to FIG. 1, and an upper limit position detection sensor 52 and a lower limit position detection sensor 53 are provided with reference to FIG. The lower limit position detection sensor 53 detects the lower limit position of the suction grille 9 based on the length of the hanging string 31.

Specifically, the payout length of the suspension cord 31 is detected by the number of turns (height) of the suspension cord 31 wound around the main pulley 100B.

Next, the operation of the embodiment will be described with reference to FIG.

For example, prepare a pull-down rod,
When the pull switch 51 is pulled by using this (S1), the suction grill elevating motor 140 is rotated forward and the drive system 150 is driven.
Is driven, and the suction grill 9 starts descending via the hanging string 31 (S2). Furthermore, when the pull switch 51 is pulled (S3), the suction grill 9 stops descending (S4),
Further, when the pull switch 51 is pulled (S5), the suction grill raising / lowering motor 140 is rotated in the reverse direction, and the suction grill 9 is rotated.
Starts to rise (S6).

A rotary switch is adopted as the pull switch 51, and when the switch is repeatedly pulled, the suction grill elevating motor 140 repeats "forward rotation", "stop" and "reverse rotation", The suction grill 9 repeats "descent", "stop", "up", and "stop" operations in sequence.

At step S6, after the suction grill 9 has turned upward,
When the suction grill 9 reaches the upper limit position, the upper limit position detection sensor 52 is activated, and at the same time, the timer 143 is activated, and after X seconds (for example, 0.3 to 2 seconds) elapse (S
7), the reverse rotation of the suction grill lifting / lowering motor 140 is stopped, and the lifting of the suction grill 9 is stopped (S8).

When the suction grille 9 is lifted by the hanging strap 31, the suction grille 9 may be lifted in some cases because the lengths of the four hanging straps 31 are not always equal.
May be lifted in an inclined state.

According to this embodiment, however, even if the suction grill 9 is lifted in a tilted state, the suction grill is moved up and down after a predetermined time (X seconds) has elapsed since the upper limit position detection sensor 52 was activated. Since the reverse rotation of the motor 140 is stopped, the rotation of the main pulleys 100A and 100B is continued until all the suspension cords 31 are completely wound up until then, so that the suction grill 9 becomes horizontal. It is completely lifted up to and completely adheres to the decorative panel 7. In this case, among the four suspension strings 31, the main pulleys 100A and 100B on which the suspension string 31 has already been wound idle on the shaft portion of the shaft 110 as described above.

In the process of lowering the suction grille 9, by pulling the pull switch 51 as described above (S3),
Since the suction grill 9 stops descending (S4), the suction grill 9 can be temporarily stopped at an arbitrary position. Although not shown in FIG. 1, an air purification filter 24 (FIG. 4) is mounted on the upper part of the suction grille 9, so that the suction grille 9 is pulled down from the ceiling surface 6 as shown, and When the operation is temporarily stopped, operations such as replacement and cleaning of the filter 24 can be performed at a low place.

Therefore, compared with the case of working at a high place, not only the work is simple but also the work safety can be improved.

The lifted suction grille 9 may be fixed to the decorative panel via suction grill lock means (not shown), but this lock means is not essential and is omitted in this embodiment. doing. As a simple suction grill locking means, referring to FIG.
It is possible to provide the magnet 43 on the and to lock the suction grill 9 with this magnet 43.

In short, according to this embodiment, by driving the motor 140 for raising and lowering the suction grill, the shaft 110 rotates, and the main pulleys 100A, 100B connected to the shaft 110 via a clutch rotate. Hanging string 31 wound around the main pulleys 100A and 100B
Is unwound / rewound, and the suction grill 9 is automatically moved up and down by this, so that when the air cleaning filter 24 is maintained, it can be pulled down to a low place for maintenance.

Further, according to the structure of this embodiment, since only one suction grill raising / lowering motor 140 is provided, the cost increase is small, and the suction grill raising / lowering motor 14 is not required.
Compared with the case where a plurality of 0s are provided, the structure is simple and the number of failures is small. Also, if an excessive load is applied,
Since the clutch operates and the main pulleys 100A and 100B run idle, the burnout of the suction grill elevating motor 140 is prevented.

Further, even when the lengths of the four hanging strings 31 are unbalanced when the hanging strings 31 are unwound, the main pulleys 100A, 100A,
Since the unbalance of the length of the hanging string 31 is absorbed by the idle rotation of 100B, the suction grill 9 is completely adhered to the decorative panel 7, and no gap is generated there.

[0039]

According to the invention described in claim 1, the opening of the decorative panel is provided with two areas extending while leaving an area necessary for air intake, and one area is provided with a suction grill. Since the drive system for moving up and down is arranged and the electric equipment box is arranged in the other area, it is possible to arrange the drive system and the electric equipment box in the suction path of the air conditioner so as not to become a suction resistance.

According to the second aspect of the present invention, since the drive system is fixed to the decorative panel and the electrical equipment box is fixed to the unit body, when the maintenance is required, the decorative panel can be simply removed to perform the maintenance. You can

According to the third aspect of the invention, the two areas are provided on opposite sides of the opening, and the central space is open, so that the drive system and the electrical equipment box are provided in the suction path of the air conditioner. It can be arranged so that it does not become a resistance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a ceiling-embedded air conditioner according to the present invention.

FIG. 2 is a plan view showing a suction grill.

FIG. 3A is a perspective view showing a state where a suction grille is suspended, and FIG. 3B is an enlarged view of a hook.

FIG. 4 is a longitudinal sectional view of the ceiling-mounted air conditioner.

FIG. 5 is a diagram showing a processing flow of the present invention.

[Explanation of symbols]

 2 Unit body 7 Decorative panel 9 Suction grill 24 Filter 31 Suspension cord 100A, 100B Main pulley 110 Shaft 130 Rotational force transmission means 140 Suction grill lifting motor 150 Drive system

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazunobu Okawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Ichiaki Sakaino 2-chome, Keihanhondori, Moriguchi-shi, Osaka Address No. 5 Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A ceiling-embedded air conditioner comprising a decorative panel having an opening opening to a ceiling surface, and a suction grill supported on a lower surface of the decorative panel so as to be lifted and lowered in the opening of the decorative panel. Providing two areas extending while leaving an area necessary for taking in air, a drive system for raising and lowering the suction grill is arranged in one area,
A ceiling-embedded air conditioner that has an electrical box installed in the other area. 2. The ceiling-embedded air conditioner according to claim 1, wherein a drive system for raising and lowering the suction grill is fixed to the decorative panel, and the electrical equipment box is fixed to a unit body. . 3. The ceiling-embedded air according to claim 1, wherein the opening has a substantially rectangular shape, and the two areas are provided at positions on opposite sides of the opening. Harmony machine.