JPH1123052A - Ceiling built-in type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling built-in type air conditioner in which an operation under a high pressure may not be performed even in the case that non- azeotropic mixed refrigerant, in particular, R407C refrigerant is used. SOLUTION: There is provided a ceiling built-in type air conditioner having an ornamental panel 7 in which a suction grill 10 is installed at a lower part of a main body 2 of the air conditioner, wherein this air conditioner is comprised of a heat exchanger 3 through which refrigerant of non-azeotropic refrigerant flows; guides 20, 23 which can be fixed to or removed from a suction grill 10; a wire 13 for supporting the suction grill 10 through the guides in such a way that the grill can be freely lifted up or descended; and a filter 11 removably installed at the suction grill 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-ceiling type air conditioner which cools or heats a room and buries an indoor unit body under the ceiling, or a ceiling-hanging type air conditioner in which the unit is hung from the ceiling. In particular, the present invention is suitable for cleaning, checking, or replacing a filter or a suction grill through which cold or hot air blown into a room passes.

[0002]

2. Description of the Related Art In a ceiling-embedded air conditioner in which a decorative panel is attached to a lower portion of a unit body, a rotating drum is provided, and the other end of a wire having one end wound around the rotating drum is connected to a suction grill. It is known that the suction grill is supported so as to be able to move up and down, and the suction grill and a filter supported by the suction grill are moved up and down by driving a motor.
No., published in Japanese Patent Application Publication No.

Further, when the suction grille is housed in the decorative panel, the motor is turned on, the wire wound around the rotating drum is paid out, the suction grille is lowered, and the motor is driven by operating a remote controller or the like. It is known to stop the cleaning, remove the filter and wash it, as described in the publication.

Further, after the filter is washed, the wire is wound around the rotating drum, the suction grill is raised, and when the suction grill is housed in the decorative panel by a detector such as a micro switch attached to the decorative panel, the motor is turned off. Automatic stopping of driving is likewise described and known in the publication.

[0005]

In the above-mentioned prior art, it is difficult to keep the suction grill horizontal with respect to the floor because the wire must be connected to the suction grill. Therefore, further improvement is desired, for example, in order to smoothly lower the suction grille. For example, the structure becomes complicated, such as connecting the four corners of the suction grille to wires independently, and the number of parts increases. There is a risk of becoming. ◆ Waste disposal is currently a major social problem, but it is difficult to say that the structure takes into account what is called recyclability because the wire is connected to the suction grill.

Further, non-azeotropic mixed refrigerants, especially R407C
When a refrigerant is used, the pressure under the same temperature condition increases,
When the operation is performed under the same conditions as in the past, the operation is performed at a higher pressure than in the past. Accordingly, there is a problem that the operating pressure further increases due to the clogging of the suction grille, and the cooling / heating capacity decreases, the reliability, and the compressor life decreases.

An object of the present invention is to solve the above-mentioned problems, to provide a ceiling-mounted air conditioner which reduces the number of parts, facilitates disassembly for each material, and is suitable for an environment such as energy saving. It is in. Another object of the present invention is to provide a ceiling-mounted air conditioner that is easy to maintain, has an advantage in terms of hygiene, and can maintain an aesthetic appearance even when renewed.

It is a further object of the present invention to provide a ceiling-mounted air conditioner that does not operate at a high pressure even when a non-azeotropic mixed refrigerant, particularly R407C refrigerant is used. ◆ The present invention solves at least one of the above problems.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a unit grille having a heat exchanger and a blower embedded in a ceiling or suspended from the ceiling, and a suction grille provided in a lower portion of the unit body. In the ceiling-embedded air conditioner provided with a decorative panel having, the heat exchanger through which the refrigerant which is a non-azeotropic mixed refrigerant flows, a guide which can be attached to and detached from the suction grill, and A wire is provided that supports the suction grill so as to be able to move up and down via the guide mounted on the suction grill, and a filter that is detachably mounted on the suction grill.

Since the refrigerant flowing through the heat exchanger is a non-azeotropic refrigerant, for example, R407C refrigerant, there is no danger of destruction of the ozone layer even in decomposition or the like, and the guide can be attached to and detached from the suction grille. In addition, the suction grill itself can be replaced, and even if the filter is frequently cleaned (washed), for example, the operating pressure does not increase and the performance of the air conditioner is not impaired. And it is suitable for recycling and the performance can be improved.

In the above-mentioned apparatus, it is desirable that the guides can be attached to and detached from the four corners of the suction grill. Further, the present invention provides a ceiling-embedded air conditioner having a unit body having a heat exchanger and a blower embedded in a ceiling or suspended from the ceiling, and having a decorative panel having a suction grill at a lower part of the unit body. On the machine,
A heat exchanger through which the non-azeotropic mixed refrigerant flows, a rotating drum driven in forward and reverse rotation, and one end wound around the rotating drum and the other end positioned at two of four corners of the suction grille And a wire fixed to the decorative panel and guided to support the suction grill in a vertically movable manner, and a filter detachably mounted on the suction grill.

The other end of the wire is guided at two of the four corners of the suction grille and is fixed to the decorative panel. Since the refrigerant flowing through the heat exchanger is a non-azeotropic mixed refrigerant, the suction grille moves up and down horizontally. In addition, since the ascending and descending can be performed smoothly, the suction grill and the filter can be frequently cleaned (cleaned) even when a non-azeotropic mixed refrigerant is used, and the operating pressure does not significantly increase due to the clogging. Therefore, there is no danger that the cooling and heating capacity is reduced, the reliability, and the compressor life is reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side sectional view showing a state in which a suction grill of an embedded ceiling air conditioner according to an embodiment is lowered, FIG. 2 is a perspective view showing a main part of a lifting mechanism of the suction grill, and FIG. FIG. 4 is a perspective view showing a guide roller unit, FIG. 5 is a partial sectional view of a guide roller unit according to another embodiment, and FIG.
FIG. 3 is a partial plan view of the guide roller unit.

In FIG. 1, reference numeral 2 denotes a unit body which is an indoor unit of a ceiling-embedded air conditioner, which is buried behind a ceiling 1 in a room. A heat exchanger 3, a drain pan 4, a blower 5, and a fan motor 6 are arranged inside the unit body 2, and a decorative panel 7 is detachably mounted below the unit so as to cover the opening.

A suction port 8 is formed at the center of the decorative panel 7, and a discharge port 9 is provided in two directions on both sides of the suction port 8 or in four directions around the periphery. A suction grill 10 is fitted into the suction port 8 (a state in which the suction grill is raised. FIG. 1 shows a state in which the suction grill is lowered), and a filter 11 is detachably mounted on the suction grill 10 at an upper portion thereof. It is attached so that it becomes.

When performing a cooling operation with this air conditioner,
By operating a refrigeration cycle (not shown), a non-azeotropic mixed refrigerant, preferably R407C, is circulated to the heat exchanger 3 through a refrigerant pipe (not shown). Then, the indoor air is sucked in from the suction port 8 by the blower 5 driven by the fan motor 6 and is purified by the filter 11.
The cooling air is blown into the room from the outlet 9 as a cooling air to cool the room. Since the same applies to the case of the heating operation, the description is omitted.

Here, the refrigerant flowing through the heat exchanger is a non-azeotropic mixed refrigerant, for example, R407C refrigerant, so that the filter 11 can be frequently cleaned (washed).
As an air conditioner, performance can be stabilized, for example, an increase in operating pressure can be prevented, and air conditioning performance can be improved. Then, the suction grill can be lowered by the lifting mechanism of the suction grill 10 to make it easy and easy including replacement and maintenance, thereby ensuring cooling / heating capability, reliability, and compressor life.

Next, the lifting mechanism of the suction grille will be described. ◆ In FIGS.
Guide rollers 20 are respectively attached to the four corners of. One end of each of the two wires 13 is wound around a rotary drum 12 driven by a motor 12 via a guide roller 20, the other end is fixed to a decorative panel 7, and supports the suction grill 10 so as to be able to move up and down. ing.

Each rotary drum 12 is driven by a reversible rotatable motor 21 which is driven and controlled by a control unit (not shown). With this drive, the wire 13 is unwound or wound up from the rotary drum 12 and the suction grill 10 is wound. It is raised and lowered. Normally, suction grill 10 is stored in decorative panel 7.

When cleaning the filter 11 and the suction grill 10, the motor 21 is driven when the suction grill 10 is housed in the decorative panel 7. Then, by rotating the two motors 21 in reverse, each rotating drum 21 is rotated.
, The wires 13 are respectively unwound and fed out, so that the suction grill 10 is lowered and hung.

When the suction grill 10 has descended to a predetermined position, the drive of the motor 21 is stopped by operating a remote controller (not shown) or the like. At this time, when there are a plurality of indoor units in the same room such as a building, it is desirable that one remote control lowers the suction grills 10 of the plurality of indoor units almost simultaneously. ◆ Suction grill 1
After 0 has dropped, the filter 11 can be removed for cleaning or washing.

After the filter 11 is washed, the filter 11 is placed on the suction grill 10 again, and the motor 21 is driven again by operating a remote controller or the like, so that the wire 13 is wound around the rotating drum 12, and the suction grill 10 is Rise.
Since a detector such as a micro switch 23 is attached to the decorative panel 7, the drive of the motor 21 can be automatically stopped when the suction grill 10 is stored in the suction port 8 of the decorative panel 7.

Here, since one end of the wire 13 is not connected to the suction grill 10, the suction grill 1
There is no need to support the four corners of 0, increase the number of wires 13, increase the number of rotary drums 12 and the number of motors 21 for moving them to four, or increase the output of the motors 21. The structure can be simplified. Since the wire 13 is fixed to the decorative panel 7 via the guide roller 20 by the fixing portion 24, the posture when the suction grill 10 descends does not depend on the length of the wire 13.

Furthermore, since the suction grill 10 itself can be attached and detached, for example, when the suction grill 10 is used in a restaurant or the like and the oil dirt of the suction grill 10 itself needs to be cleaned frequently, a non-azeotropic mixed refrigerant is used. It is also advantageous when used to stabilize performance. Furthermore, since the suction grille 10 can be replaced, it is desirable to consider the maintenance of aesthetic appearance, hygiene and the like when the mounting portion of the suction grille 10 itself is damaged. Furthermore, since the decorative part 7 is provided with the fixing part 24 for the rotating drum 12, the motor 21, and the wire 13, the main part of the elevating mechanism is located on the decorative panel 7, and maintenance and replacement such as failure of the elevating device are performed. Can be facilitated.

Next, a case where the suction grill 10 is removed will be described with reference to FIG. The removal of the wire 13 is performed by providing a spring-shaped wire removing port 202 in a part of the roller support portion 204 that rotatably supports the guide roller 20, and pulling the wire 13 downward therefrom. . Thereafter, in the same procedure, the wire 1 from the guide roller 20 attached to the four corners of the suction grill 10
By removing 3, the suction grill 10 can be removed.

Next, when attaching the suction grill 10, the wire 13 is first passed through the wire insertion port 203, and the wire 13 is pulled upward, so that the wire 13 is supported by the guide roller 20. Guide roller 2
0 and a roller support portion 20 for supporting the guide roller 20
Since the gap 4 is smaller than the thickness of the wire 13, the wire 13 does not enter the gap.

At the center of the guide roller 20, a wire 13 is provided.
A guide groove 201 for supporting the guide roller 2 is provided.
It is supported at the center of 0 and there is no danger of falling. Even if the wire 13 is detached from the guide roller 20, the wire 13 is supported by the roller support portion 204 attached to the suction grill 10.

The suction grill 10 is balanced by its own weight by the guide roller 20, and is stored in the decorative panel 7 while keeping it horizontal to the floor.

Next, another embodiment of the structure for removing the suction grille 10 will be described with reference to FIGS. ◆
The suction grill 10 has an opening 101 with a step as shown in the figure, and when the suction grill 10 is attached, first, the guide stay 2 for supporting the guide roller 20 is provided.
3 is inserted through the opening 101 while being rotated 90 degrees horizontally from the normal state. The guide stay 23 inserted from the opening 101 is horizontally rotated backward by approximately 90 degrees by the tension of the wire 13, and is attached to the opening 102 by the weight of the suction grill 10. As a result, the guide stay 23 is supported by the suction grill 10.
◆ To remove the suction grill 10, open the opening 10
The guide stay 23 stored in the guide stay 2 is pulled out downward and rotated horizontally by 90 degrees.
Insert

Further, the opening 101 is provided with the suction grill 1
0, the suction grille 10 cannot be opened and closed due to the failure of the motor 21 and the lifting / lowering function does not work.
The guide stay 23 housed in the opening 02 is pulled out from the opening 101 so that the suction grill 10 can be opened and closed.

In each of the embodiments described above, the motor 21
And two wires 13, but the guide roller 20
May be arranged at the center of the suction grille 10 to form a single wire and a single motor. Further, for example, when the suction grille 10 is heavy or large, the wire 13, the rotating drum 12 for winding the wire 13, the motor 21, and the like may be provided in an arbitrary number by weight distribution of the suction grille 10.

As described above, the torque of the motor 12 required for winding the rotary drum 21 can be reduced to reduce the size and weight of the motor, which is advantageous in terms of noise, energy saving and safety.

The guide rollers 20 attached to the suction grille 10 are formed as smooth pulleys, so that the suction grille 10 is balanced by its own weight and is kept horizontal with respect to the floor surface. No special equipment and control is required. Furthermore, the fixed end of the wire 13 is not a movable part that performs a vertical movement, but is provided on the decorative panel 7 so that the probability of breakage can be reduced, which is a desirable structure from the viewpoint of safety.

[0034]

According to the present invention, it is possible to obtain an in-ceiling type air conditioner which is suitable for an environment in which the lifting and lowering operation of the suction grill is smooth, the structure is simple, and the number of parts is small. ◆
Further, according to the present invention, the power required for lifting and lowering is reduced,
The lifting operation of the suction grill is further smoothed, the lifting device can be reduced in size and weight, and a ceiling-mounted air conditioner suitable for energy saving can be obtained.

Further, according to the present invention, it is possible to obtain a ceiling-embedded air conditioner which is suitable for recycling, sufficiently considers the environment, and has improved performance. ◆ Further, according to the present invention, it is possible to obtain a ceiling-mounted air conditioner that is easy to maintain, advantageous in hygiene, and can maintain an aesthetic appearance even when renewed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a state in which a suction grill according to an embodiment is lowered.

FIG. 2 is a perspective view showing a main part of a lifting mechanism of the suction grille according to the embodiment.

FIG. 3 is a side sectional view showing a main part of a lifting mechanism of the suction grille according to the embodiment.

FIG. 4 is a perspective view showing a guide roller unit according to one embodiment.

FIG. 5 is a partial cross-sectional view of a guide roller unit according to another embodiment.

FIG. 6 is a partial plan view of a guide roller unit according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ceiling, 2 ... Unit body, 3 ... Heat exchanger, 4 ... Drain pan, 5 ... Blower, 6 ... Fan motor, 7 ... Makeup panel, 8 ... Suction port, 9 ... Blow-off port, 10 ... Suction grill, 101, 102 ... opening, 11 ... filter, 12
... Rotary drum, 13 ... Wire, 14 ... Guide, 20 ... Guide roller, 21 ... Motor, 22 ... Guide stay, 23
…Microswitch.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshiki Hata 390 Muramatsu, Shimizu-shi, Shizuoka Prefecture Inside the Air Conditioning Systems Division, Hitachi, Ltd. Inside

Claims (3)

[Claims] 1. A ceiling-embedded air conditioner having a unit body having a heat exchanger and a blower buried in or suspended from a ceiling, and having a decorative panel having a suction grill at a lower portion of the unit body. In the above, the heat exchanger through which the refrigerant which is a non-azeotropic mixed refrigerant flows, a guide which can be attached to and detached from the suction grill, and the suction grill via the guide attached to the suction grill An embedded ceiling air conditioner, comprising: a wire supported so as to be movable up and down; and a filter detachably attached to the suction grill. 2. The air conditioner according to claim 1, wherein the guides can be attached to and detached from four corners of the suction grill. 3. A ceiling-embedded air conditioner having a unit body having a heat exchanger and a blower embedded in or suspended from a ceiling, and having a decorative panel having a suction grill below the unit body. In the above, the heat exchanger through which the non-azeotropic mixed refrigerant flows, a rotating drum driven in forward and reverse rotations, one end of which is wound around the rotating drum, and the other end of which is one of four corners of the suction grille. A ceiling-mounted air conditioner, comprising: a wire guided at two places, fixed to the decorative panel, and supporting the suction grill so as to be able to move up and down; and a filter detachably mounted on the suction grill. Machine.