JPH10160183A - Ceiling-mounted air conditioner - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an in-ceiling type air conditioner that can easily and surely adjust the external static pressure of a blower, is inexpensive, and can easily maintain the blower. A unit body 1 having a suction port 1b on one side and a blow-off port 1a on the other side is disposed in a ceiling plate 3, and inside the unit main body 1, a heat exchanger 8 is opposed to each other. A blower 7 is arranged, and a part of the blown air of the blower is bypassed to a suction side on a ceiling plate facing surface of the unit body,
An external static pressure adjusting unit 15 that can adjust the amount of the bypass wind through a ceiling plate is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted air conditioner disposed inside a ceiling plate.

[0002]

2. Description of the Related Art As shown in FIG. 5, an air conditioner for performing air conditioning for cooling and heating is provided for a large area such as one floor of a building. That is, the indoor unit a is arranged inside the ceiling plate b. The indoor unit a is connected to a plenum chamber d and an outlet grille e disposed at each air conditioning space via a duct c.

Further, a suction grill h is connected to the indoor unit a via an air cleaning unit f and a return duct g. The air purifying unit f and the air-conditioning ventilation fan i connected to the air purifying unit f are designated devices.

[0004] The indoor unit a is provided with a refrigerant pipe j.
Is connected to an outdoor unit k, which is disposed outdoors, via a refrigeration cycle of a heat pump type. The indoor unit a and the outlet grille e are electrically connected to the control unit m, and only the outlet grille e is remote-controlled (remote control panel).
n.

[0005]

By the way, since the length of the duct c from the indoor unit a to each outlet grille e is different, the duct resistance in each duct is different, but the conditioned air flows from each outlet grille e. It must be set to blow out with a uniform air volume.

[0006] Alternatively, in the case of a store, for a particular product to be sold, it may be necessary to secure an air volume suitable for the product, and it is also possible to change the air volume of the air outlet grille in accordance with a change in arrangement conditions. Required.

Conventionally, to adjust the air flow according to the duct resistance of this type of ceiling-mounted air conditioner, 1) an adjustment damper is provided in the outlet duct c. 2) Adjust the fan speed of the blower by changing the fan pulley diameter. 3) Adjust the speed of the fan motor of the blower with an inverter or a phase controller. Such methods have been adopted.

[0008] However, these methods for adjusting the air volume are as follows.
In the adjustment using the damper of 1), only about 10% of the surplus static pressure can be adjusted, so that the effect obtained for the cost is small. Moreover, wind noise is easily generated in the damper portion.

[0009] The replacement of the pulley 2) is time-consuming and difficult to make fine adjustments. If the inverter or the like of 3) is used, it becomes expensive, and for example, it becomes too expensive to adjust only for initial setting. There is a defect such as. Therefore, there is a need for the development of another new method that can easily and surely adjust the external static pressure and can provide it at low cost.

On the other hand, since this air conditioner is incorporated inside the ceiling plate b, it is characterized in that it is extremely difficult to maintain the blower constituting the air conditioner.

That is, dust is electrostatically attached to blades constituting a fan of a blower with a long-term use.
If the dust is left unattended, the dust accumulates and the layer becomes thicker, and may eventually fly into the air-conditioned space due to the blowing wind.

Therefore, the ceiling plate is peeled off at predetermined intervals to open the unit body, and the blower is taken out therefrom. Further, since the fan was disassembled into a fan casing and a fan to clean the fan blades, it was troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily and reliably adjust the external static pressure and to provide it at a low cost, and to facilitate maintenance of a blower. It is an object of the present invention to provide a ceiling-mounted air conditioner that can be manufactured.

[0014]

According to a first aspect of the present invention, there is provided an in-ceiling type air conditioner having an inlet on one side and an outlet on the other side. The air conditioner body disposed in the air conditioner body, the ceiling-mounted air conditioner including a heat exchanger and a blower housed in the air conditioner body and disposed to face each other, wherein the air conditioner body It is provided on the ceiling plate facing surface,
Bypass a part of the blowing air from the blower to the suction side,
It is characterized by including an external static pressure adjusting section which makes it possible to adjust the amount of the bypass wind via the ceiling plate.

According to a second aspect of the present invention, in the ceiling-mounted type air conditioner according to the first aspect, the blower includes a fan casing having a suction portion and a blow-out portion, a fan housed in the fan casing, and a fan. A fan motor connected to the fan and configured to rotate the fan, wherein the external static pressure adjusting section is provided with an opening provided in the vicinity of a fan casing outlet of the blower, and an opening amount can be adjusted with respect to the opening. And an adjusting plate.

According to a third aspect of the present invention, in the ceiling-mounted air conditioner according to the second aspect, the opening provided in the fan casing has a scale marked on one side with a numerical scale corresponding to the external static pressure. A part is provided.

According to a fourth aspect, in the ceiling-mounted type air conditioner according to the second aspect, the adjusting plate is detachable from a fan casing, and the air conditioner main body portion facing the adjusting plate; The ceiling plate portion facing the harmonic device main body portion can be opened and closed freely.

By providing the means for solving the above-mentioned problems, according to the first to third aspects of the present invention, the external static pressure can be easily and reliably adjusted, and the inexpensive provision is possible. And According to the invention of claim 4, maintenance for the blower is facilitated.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2,
It has the configuration of an indoor unit that is a ceiling-mounted air conditioner. In the figure, reference numeral 1 denotes a unit main body, which is an air conditioner main body, which is suspended from a beam member via a hanging tool.

The unit main body 1 is housed in a ceiling plate 3 vertically suspended from the beam member at a predetermined distance from the beam member 2 via a hanging tool (not shown), and a small portion of the unit body 1 is also separated from the ceiling plate. There is no exposure. The unit body 1 is formed in a rectangular shape in vertical and horizontal directions, and duct connection portions 1a, 1
b is protruded.

An outlet duct 4 is connected to one of the duct connecting portions 1a (the left side in the figure), and the other duct connecting portion 1b.
The suction duct 5 is connected to the right side of the drawing. Therefore, one duct connection part 1a becomes an outlet body,
The other connecting portion 1b serves as a suction port body.

As shown in FIG. 2 only, an electric component box 6 is provided on the back side of the unit main body 1 and accommodates electric components for performing electric control on a blower 7 described later. Inside the unit body 1, an indoor heat exchanger 8 and a blower 7
Are arranged opposite to each other. The indoor heat exchanger 8 is erected so that an upper end thereof is outside the lower end, and the lower end is disposed on a drain plate 9.

The blower 7 has a fan casing 12 provided with a suction portion 10 on a side surface portion and a blowout portion 11 on a peripheral surface portion, a fan 13 housed in the fan casing 12, and a rotating fan 13. And a fan motor 14 to be driven.

The outlet 11 is arranged to face a duct connecting portion 1a which is an outlet provided in the unit body 1, and the fan motor 14 is arranged to face one suction unit 10.

A part of the fan casing 12 which constitutes the blower 7 is provided with an external static pressure adjusting unit 15 which will be described later. As shown in FIGS. 3 and 4, a rectangular opening 16 is provided in front of the blowout portion 11 of the fan casing 12.
Is provided. At both sides in the width direction of the opening 16, there are provided mounting portions 17 formed of screw holes, and at one side of the one mounting portion 17, a scale which is a scale representing a substantial numerical value of the external static pressure A part 18 is provided.

An adjusting plate 20 capable of adjusting the opening amount is attached to the opening 16. The adjusting plate 20 is also formed in a rectangular shape, and a mounting slot 21 is provided on both sides at the same pitch as the mounting portion 17 and along the vertical direction in the figure.

Except for the upper end, the mounting elongated hole 21 has a width substantially the same as the diameter of the mounting portion 17, and the upper end is formed in a so-called daruma hole shape having a larger diameter. Dharma hole 21a.

An adjusting plate 20 is brought into contact with the outer surface of the fan casing 12 and a mounting slot 21 is formed in the mounting portion 17.
The fixing plate 22 as a fixing screw is screwed into the mounting portion 17 through the elongated hole 21 so as to face the adjusting plate 2.
0 is attached to the fan casing 12.

By adjusting the position of the mounting long hole 21 with respect to the mounting portion 17, the adjusting plate 20 with respect to the opening 16 is adjusted.
The position of the upper edge fluctuates. That is, the adjusting plate 20 is capable of adjusting the opening amount of the opening portion 16, and the opening amount is an external static pressure as described later, and the numerical value is indicated on the scale portion 18.

When the adjusting plate 20 is moved to the lower end in FIG.
The fixture 22 is opposed to the Dharma hole 21a. The diameter of the darma hole 21a is larger than the diameter of the head of the fixing tool 22, so that the adjustment plate 20 can be removed without removing the fixing tool 22.

In practice, since the adjusting plate 20 is disposed horizontally so as to face the lower surface of the unit body 1, the adjusting plate 20 is slid in the horizontal direction to perform the above-described operation. .

The external static pressure adjusting section 15 thus configured, and as shown in FIGS. 1 and 2 again, a portion of the unit main body 1 that faces the external static pressure adjusting section 15 includes: A service opening 23 is opened, and a service panel 24 is pivotally mounted on the outer surface of the unit body.

That is, when the service panel 24 is rotated to open the service opening 23, the external static pressure adjusting section 15 can be adjusted. Then, in the three portions of the ceiling plate facing the service panel 24,
The decorative panel 25 is attached so as to be openable and closable, and the service panel 24 can be handled by opening the decorative panel 25.

After arranging the respective components of the ceiling-mounted air conditioner at predetermined locations and assembling them into an operable state, the arrangement conditions of the indoor units in the air-conditioned space due to special circumstances, and the above description will be described. The initial setting of the surplus static pressure for the blower 7 is made in accordance with the arrangement condition of the blowout grill thus set.

To do so, the decorative panel 25 provided on the ceiling plate 3 is opened, and the service panel 24 provided on the unit body 1 is rotated to open the service opening 23. Then, a hand is inserted through these openings to adjust the external static pressure adjusting unit 15 provided in the blower 7.

Actually, the fixture 2 for fixing the adjustment plate 20
2 is adjusted to make the adjustment plate 20 movable. Then, the adjusting plate 2 is set on the numerical scale set on the scale section 18.
Move the adjustment plate so that the edges of 0 are aligned. Thereafter, the fixing plate 22 may be tightened to fix the adjustment plate 20, and the service panel 24 and the decorative panel 25 may be closed.

When the blower 7 is driven in this state, a part of the wind is opened to the outside static pressure adjusting unit 15 immediately before the wind is blown out from the blowing unit 11 of the fan casing 12.
6 is discharged. The air discharged from the opening 16 is immediately sucked into the suction portion 10 opened in the fan casing 12.

That is, in addition to the wind blown from the blower 7 to the blow duct 4, the opening 1
There is a wind circulating bypassing the suction section 6 and the suction section 10.
The flow rate of the bypass wind can be adjusted by moving the adjusting plate 20 of the external static pressure adjusting unit 15, and the adjustment of the so-called excess static pressure can be easily and reliably performed.

Further, the external static pressure adjusting section 15 includes an opening 16 provided in the fan casing 12, an adjusting plate 20 for adjusting the opening amount of the opening, and a fixing tool 22 for mounting the adjusting plate. Therefore, it can be provided at a low price.

Further, it is necessary to perform maintenance on the blower 7 every predetermined period. At this time, the makeup panel 25 and the service panel 24 are opened so that the adjustment plate 20 of the external static pressure adjustment unit 15 can be seen.

Next, the fixing plate 22 is loosened, and the adjusting plate 20 is moved so that the darma hole 21 a provided in the adjusting plate 20 faces the fixing plate 22. At the time of facing, fixture 2
The adjustment plate 20 is removed from the fan casing 12 by inserting the darma hole 21 a into the 2.

Since the fan 13 is exposed from the opening 16, dust adhering to the fan blade is removed with a cleaning tool such as a brush. After removal, maintenance can be completed by working in the reverse order.

Therefore, compared to the conventional operation of removing the blower from the unit main body and disassembling the blower to remove dust adhering to the fan blade, it can be performed very easily.

[0044]

As described above, the first aspect of the present invention is:
On the surface facing the ceiling plate of the air conditioner main body, an external static pressure adjustment unit is provided that bypasses a part of the blowout wind of the blower to the suction side and that can adjust the flow rate of the bypass wind through the ceiling plate. Was.

According to a second aspect of the present invention, the external static pressure adjusting section comprises an opening provided in the vicinity of the fan casing outlet of the blower, and an adjusting plate capable of adjusting the opening amount with respect to the opening.

According to a third aspect of the present invention, the opening portion provided in the fan casing has a scale portion provided on one side thereof in accordance with the external static pressure. Therefore, according to the first to third aspects of the present invention, it is possible to easily and surely adjust the external static pressure, which is the excess static pressure after the duct is connected, and to provide an inexpensive configuration.

According to a fourth aspect of the present invention, the adjusting plate is detachable from the fan casing, and the air conditioner main body portion facing the adjusting plate and the ceiling plate portion are freely openable and closable. However, it is possible to perform maintenance without removing the blower without changing the blower, and it is possible to improve the workability easily.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an embedded ceiling air conditioner showing an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the inside of the ceiling-mounted air conditioner of the embodiment.

FIG. 3 is an exploded perspective view of an external static pressure adjusting unit provided in the blower according to the embodiment.

FIG. 4 is a front view of an external static pressure adjusting unit provided in the blower according to the embodiment.

FIG. 5 is a perspective view of the entire air-conditioning system including the ceiling-mounted air conditioner.

[Explanation of symbols]

 1b: Suction port body, 1a: Blow-off body, 3: Ceiling plate, 1 ... Air conditioner body (unit body), 8 ... Heat exchanger, 7 ... Blower, 15 ... External static pressure adjustment unit, 10 ... Suction Reference numeral 11: blow-out part, 12: fan casing, 13: fan, 16: opening, 20: adjusting plate, 18: scale part, 24: service panel, 25: decorative panel.

Claims (4)

[Claims] 1. An air conditioner main body provided with a suction port on one side and an outlet on the other side and arranged in a ceiling plate, housed in the air conditioner main body, and arranged to face each other. In a ceiling-embedded air conditioner including a heat exchanger and a blower, provided on the ceiling plate facing surface of the air conditioner main body, a part of the blowout wind of the blower is bypassed to a suction side, and An in-ceiling type air conditioner, comprising: an external static pressure adjusting unit capable of adjusting an air volume through the ceiling plate. 2. The blower comprises a fan casing having a suction portion and a blow-out portion, a fan housed in the fan casing, and a fan motor connected to the fan and driving the fan to rotate. 2. The external static pressure adjusting section comprises an opening provided in the vicinity of a fan casing outlet of the blower, and an adjusting plate capable of adjusting an opening amount with respect to the opening. Ceiling-mounted air conditioner. 3. The ceiling according to claim 2, wherein the opening provided in the fan casing is provided on one side thereof with a scale portion on which a numerical scale corresponding to the external static pressure is written. Embedded air conditioner. 4. The adjusting plate is detachable from a fan casing, and an air conditioner main body portion facing the adjusting plate and a ceiling plate portion facing the air conditioner main body portion can be freely opened and closed. The ceiling-mounted air conditioner according to claim 2, wherein: