WO2008069200A1

WO2008069200A1 - Air conditioning apparatus

Info

Publication number: WO2008069200A1
Application number: PCT/JP2007/073395
Authority: WO
Inventors: Akinori Nakai
Original assignee: Daikin Industries, Ltd.; Panasonic Corporation
Priority date: 2006-12-06
Filing date: 2007-12-04
Publication date: 2008-06-12
Also published as: JP2008144985A; ES2642044T3; EP2090843B1; AU2007329953B2; JP4160090B2; AU2007329953A1; EP2090843A1; EP2090843A4

Abstract

An air conditioning apparatus is provided with an indoor fan (8) for blowing air; an upper air blowing port (22a) for blowing the air supplied from the indoor fan (8) for air conditioning; a lower air blowing port (22b) for blowing the air supplied from the indoor fan (8) for air conditioning; a shutter (30) for opening and closing the lower air blowing port (22b); and a shutter driving section (31) for driving the shutter (30). After stopping operation of the indoor fan (8), the shutter (30) is driven by the shutter driving section (31) to have the lower air blowing port (22b) fully opened. In the state where the shutter (30) is opened, apart of a lower wall surface among wall surfaces, which form a lower air blowing path (P2) for leading the air supplied form the indoor fan (8) to the lower air blowing port (22b), is formed by a side surface of the shutter (30).

Description

Specification

Air conditioner

Technical field

[0001] The present invention relates to an air conditioner.

Background art

Conventionally, as an air conditioner, an upper air outlet that blows air from a fan upward, a lower air outlet that blows air from a fan forward, an upper damper that opens and closes the upper air outlet, Some have a lower damper that opens and closes the air outlet (see, for example, Japanese Patent Laid-Open No. 2000-208366).

[0003] In this air conditioner, the upper damper is opened and the lower damper is closed during cooling operation to prevent cold air from blowing under the feet, while the upper damper is closed and heating the lower damper during heating operation. It is in an open state to send warm warm air to the feet.

[0004] By the way, after the cooling operation of the air conditioner is stopped, if the upper damper is opened and the lower damper is left closed, if a foreign object accidentally enters from the upper outlet, There is a case where the foreign matter stops at the damper and the foreign matter does not come out of the lower outlet force. In addition, when such foreign matter is clogged, when the lower damper is opened and closed at the start of the next operation, the lower damper may not move normally due to the foreign matter.

Disclosure of the invention

Problems to be solved by the invention

[0005] Therefore, an object of the present invention is to provide an air conditioner that can easily remove foreign matter from the lower air outlet even if foreign matter enters the upper air outlet force and prevents foreign matter from opening and closing the shutter. Is to provide a machine.

Means for solving the problem

[0006] In order to solve the above problems, an air conditioner of the present invention provides:

A body casing;

A fan for blowing air disposed in the main body casing;

It is provided on the upper part of the main casing and blows air for air conditioning from the fan. An upper air outlet,

A lower air outlet provided at a lower portion of the main body casing for blowing out air for air conditioning from the fan;

A shutter for opening and closing the lower air outlet;

A shutter driving unit for driving the shutter;

With

The shutter driving unit drives the shutter to stop the lower air outlet fully open after stopping the fan operation or immediately before stopping the fan operation.

[0007] According to the air conditioner having the above-described configuration, the shutter is driven by the shutter drive unit after the operation of the fan is stopped or immediately before the operation of the fan is stopped, so that the lower outlet is fully opened. Thus, even if a foreign object is mistakenly entered from the upper air outlet, the lower air outlet force foreign object can be easily taken out without disturbing the shutter. In addition, it is possible to prevent the shutter opening / closing operation from being troubled by foreign matter entering the air passage of the lower outlet.

[0008] Further, in the air conditioner of one embodiment,

In the main body casing, there is provided a lower blowing passage that guides air for air conditioning from the fan to the lower outlet.

The shutter rotates about an axis provided below the lower blowing passage, and when the shutter is fully opened, a part of the lower wall surface of the wall surface forming the lower blowing passage is formed. It is formed by the side surface of the shutter.

[0009] According to the above embodiment, the lower blowing passage is formed in a state where the shutter is rotated around the shaft provided on the lower side of the lower blowing passage to fully open the lower blowing outlet. By forming a part of the lower wall surface of the wall surface with the side surface of the shutter, there is no step on the lower wall surface of the lower blowing passage, so that foreign matter that has entered the lower blowing passage It comes out of the lower air outlet near or below the lower air outlet without being caught in the middle of the passage. Thereby, the removal of foreign matters can be facilitated.

The invention's effect

[0010] As is clear from the above, according to the air conditioner of the present invention, foreign matter is introduced from the upper air outlet. Even if it enters by mistake, the lower air outlet force can easily remove foreign matter, and an air conditioner that can prevent malfunction of the shirter opening and closing operation due to foreign matter can be realized.

[0011] In addition, according to the air conditioner of the embodiment, the wall surface that forms the lower blowing passage is opened in a state where the shutter that rotates about the shaft provided on the lower side of the lower blowing passage is opened. A part of the lower wall surface is formed by the side surface of the shutter so that there is no step on the lower wall surface of the lower blowing passage, so that foreign matter that has entered may be caught in the lower blowing passage. The foreign matter can be easily removed because it comes out in the vicinity of the lower lower outlet or the outer side from the lower outlet.

Brief Description of Drawings

FIG. 1 is a circuit diagram of a refrigerant circuit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a perspective view of the floor-standing indoor unit of the air conditioner.

FIG. 3 is a sectional view of the indoor unit of the air conditioner.

FIG. 4 is a flowchart for explaining the operation of the control device for the air conditioner.

[FIG. 5A] FIG. 5A is a schematic diagram showing a state in which the shutter that opens and closes the lower air outlet rotates about the axis in the indoor unit of the above air conditioner by rotating the flap to open the upper air outlet. is there.

FIG. 5B is a schematic diagram showing a state where the upper air outlet is opened and the lower air outlet is closed by a shutter in the indoor unit of the air conditioner.

[FIG. 5C] FIG. 5C shows the indoor unit of the above air conditioner, with the upper air outlet opened, the shutter being tilted to the rear side along the lower wall surface of the lower air outlet passage, It is a schematic diagram which shows the state which opened.

[FIG. 5D] FIG. 5D is a schematic diagram showing a state in which a malfunction occurs in the shutter operation due to foreign matter in the indoor unit of the air conditioner.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the air conditioner of the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 shows a circuit diagram of a refrigerant circuit of an air conditioner according to an embodiment of the present invention.

As shown in FIG. 1, this air conditioner has a compressor 1, a four-way valve 2 with the discharge side of the compressor 1 connected to one end, and one end connected to the other end of the four-way valve 2. Outdoor heat exchanger 3, An electric expansion valve 4 having one end connected to the other end of the outdoor heat exchanger 3; an indoor heat exchanger 5 having one end connected to the other end of the electric expansion valve 4 via a closing valve 12; An accumulator 6 is connected to the other end of the heat exchanger 5 via a closing valve 13 and a four-way valve 2 and the other end is connected to the suction side of the compressor 1. The compressor 1, four-way valve 2, outdoor heat exchanger 3, electric expansion valve 4, indoor heat exchanger 5 and accumulator 6 constitute a refrigerant circuit! / ヽ

In addition, the air conditioner includes an outdoor fan 7 disposed in the vicinity of the outdoor heat exchanger 3, an indoor fan 8 disposed in the vicinity of the indoor heat exchanger 5, and a flap driving unit 3 that drives the flap 24. 2, a shutter drive unit 31 for driving the shutter 30 (shown in FIG. 3), the compressor 1, the electric expansion valve 4, the outdoor fan 7, the indoor fan 8, the flap drive unit 32, the shutter drive unit 31 and the like. It has a control device 11 to control!

The control device 11 includes a microcomputer, an input / output circuit, and the like, and includes a flap control unit 1 la that controls the flap drive unit 32 and a shutter control unit ib that controls the shutter drive unit 31.

[0017] Compressor 1, four-way valve 2, outdoor heat exchanger 3, electric expansion valve 4, accumulator 6, outdoor fan

7 and the control device 11 constitute the outdoor unit 10, and the indoor heat exchanger 5, the indoor fan 8, the flap drive unit 32, and the shutter drive unit 31 constitute the indoor unit 20.

[0018] In the air conditioner configured as described above, when the compressor 1 is started by switching the four-way switching valve 2 to the solid line switching position during heating operation, the high-pressure refrigerant discharged from the compressor 1 is switched off. Enter the indoor heat exchanger 5 through the valve 2. The refrigerant condensed in the indoor heat exchanger 5 enters the outdoor heat exchanger 3 after being decompressed by the electric expansion valve 4. The refrigerant evaporated in the outdoor heat exchanger 3 returns to the suction side of the compressor 1 through the four-way switching valve 2 and the accumulator 6. In this way, the refrigerant circulates through the refrigerant circuit constituted by the compressor 1, the indoor heat exchanger 5, the electric expansion valve 4, the outdoor heat exchanger 3, and the accumulator 6, and the refrigeration cycle is executed. Then, indoor air is circulated by the indoor fan 8 through the indoor heat exchanger 5 to heat the room.

On the other hand, during cooling operation, the four-way switching valve 2 is switched to the dotted line switching position, and the compressor 1, the outdoor heat exchanger 3, the electric expansion valve 4, the indoor heat exchanger 5 and the accumulator are switched. In order of 6 A refrigeration cycle in which the refrigerant circulates is executed.

FIG. 2 is a perspective view of the floor-standing indoor unit 20 of the air conditioner. As shown in FIG. 2, the indoor unit 20 includes a substantially rectangular bottom frame 21 whose rear side is attached to the wall surface of the room, and a front side of the bottom frame 21, and a substantially rectangular opening on the front side. A front grill 22 having 22c and a front panel 23 attached so as to cover an opening 22c of the front grill 22 are provided. The bottom frame 21 and the front grille 22 constitute a main body casing.

[0021] An upper air outlet 22a is provided at the upper part of the front grill 22, and a lower air outlet 22b is provided at the lower part of the front grill 22. A flap 24 is provided at the upper air outlet 22a of the front grill 22. The flap 24 is rotated during the cooling operation and the heating operation so that cool air and warm air are blown forward and obliquely upward from the upper air outlet 22a, and when stopped, as shown in FIG. 2, the upper air outlet 22a Cover.

[0022] Further, an upper suction port 23a is provided on the upper side of the front panel 23, a lower suction port 23b is provided on the lower side of the front panel 23, and side suction ports 23c (see FIG. 2 shows only the right side)!

FIG. 3 shows a cross-sectional view of the indoor unit 20 of the air conditioner. As shown in FIG. 3, a motor 26 is fixed substantially at the center of the bottom frame 21. An indoor fan 8 as an example of a fan for blowing air to which the shaft of the motor 26 is connected is disposed on the bottom frame 21 so that the shaft is in the front-rear direction. The indoor fan 8 is a turbo fan that blows air sucked from the front side radially outward with respect to the shaft. Further, a bell mouth 27 is provided on the bottom frame 21 on the front side of the indoor fan 8. Then, the indoor heat exchanger 5 is arranged on the front side of the bell mouth 27, the front grill 22 is attached to the front side of the indoor heat exchanger 5, and the front panel 23 is attached to the front side of the front grill 22. Yes. A filter 25 is attached to the opening 22c of the front grill 22. A drain pan 28 is disposed below the bell mouth 27 and below the indoor heat exchanger 5.

[0024] Further, a flap 24 for controlling the blowing direction in the vertical direction is disposed at the upper outlet 22a of the upper blowing passage P1 of the front grill 22. The flap 24 is rotated by a flap drive unit 32 (shown in FIG. 1) about a shaft (not shown) provided on the bottom frame 21 side, and is Al indicated by the dotted line is in the open state, and B1 indicated by the solid line is in the closed state.

[0025] On the other hand, a shutter 30 for opening and closing the lower air outlet 22b is disposed in the lower air outlet passage P2 of the front grill 22. This shutter 30 is rotated by a shutter drive unit 31 (shown in FIG. 1) around a shaft 30a provided on the bottom frame 21 side and below the lower blowing passage P2, and A2 indicated by a one-dot chain line is fully opened. State, B2 is fully closed. In the state where the shutter 30 is opened, a part of the lower wall surface of the wall surface forming the lower blowing passage P2 is formed by the side surface of the shutter 30, and the curved inclined slope below the lower blowing passage P2 is formed. There is no step! /

[0026] By blowing the air sucked from the opening 22c side of the front grill 22 radially outward with respect to the shaft by the indoor fan 8, the air is obliquely upward and forward from the upper outlet 22a via the upper outlet passage P1. On the other hand, air is blown forward from the lower outlet 22b through the lower outlet passage P2.

Next, the stop operation of the air conditioner control device 11 will be described with reference to the flowchart shown in FIG. This stop process is repeatedly performed during the air conditioning operation.

[0028] When the stop process is started, it is determined in step S1 whether or not the operation is stopped.

[0029] Next, in step S2, the flap drive section 32 rotates the flap 24 to close it, thereby closing the upper outlet 22a, and the process proceeds to step S3.

[0030] Next, in step S3, it is determined whether or not the shutter 30 is closed. If it is determined that the shutter 30 is closed, the process proceeds to step S4, while the shutter 30 is not closed. Then, this process ends.

[0031] Next, in step S4, the shutter drive unit 31 opens the shutter 30, and the lower outlet

22b is fully opened, and this process is terminated. The process of fully opening the lower air outlet 22b may be performed after the cooling / heating operation is stopped, or may be performed immediately before the cooling / heating operation is stopped, at least after the operation of the indoor fan 8 is stopped, Or, just before stopping the indoor fan 8 operation.

[0032] FIGS. 5A to 5D show the operation of the flap 24 and the shutter 30 of the indoor unit 20 of the air conditioner. 5A to 5D, 8 indicates an indoor fan.

[0033] FIG. 5A shows that the shutter 24 that opens and closes the lower outlet 22b is rotated about the shaft 30a by rotating the flap 24 to open the upper outlet 22a, and FIG. 5B shows the upper outlet. The lower air outlet 22b is closed by the shutter 30 with the door 22a opened. FIG. 5C shows a state in which the lower air outlet 22b is opened by tilting the shutter 30 to the rear side along the lower wall surface of the lower air outlet passage P2 with the upper air outlet 22a opened. .

[0034] Here, when foreign matter enters from the upper air outlet 22a in the state of FIG. 5B and the shirter 30 is rotated as shown in FIG. 5C, the operation of the shutter 30 is caused by the foreign matter 50 as shown in FIG. 5D. It will cause problems.

[0035] On the other hand, according to the air conditioner of the embodiment of the present invention, when the operation is stopped, the shutter 30 is driven by the shutter drive unit 31 so that the lower outlet 22b is fully opened. Even if a foreign object accidentally enters from the upper air outlet 22a, it is possible to easily remove the foreign object from the lower air outlet 22b, and an air conditioner that can prevent the malfunction of the shutter 30 opening / closing operation due to the foreign object can be realized. .

[0036] Further, the lower blowing passage P2 is formed in a state where the shutter 30 is rotated about the shaft 30a provided on the lower side of the lower blowing passage P2 so that the lower outlet 22b is fully opened. A part of the lower wall surface of the wall surface is formed by the side surface of the shutter 30 so that there is no step on the curved lower inclined surface of the lower blowing passage P2, so that the invading foreign matter Foreign matter can be easily removed because it comes out in the vicinity of the lower lower outlet 22b or outside from the lower outlet 22b, which is not caught in the middle of the outlet passage P2.

[0037] In the above embodiment, the force S described for the air conditioner using the turbo fan for the indoor fan 8 that blows out the air sucked from the front side radially outward with respect to the shaft is used as the fan for blowing air. However, the present invention may be applied to an air conditioner using other centrifugal fans or the like.

[0038] In the above embodiment, a separate type air conditioner including an outdoor unit and an indoor unit has been described. However, the present invention may be applied to an air conditioner having another configuration.

Claims

The scope of the claims

[1] Main casing (21, 22),

A fan (8) for blowing air disposed in the main casing (21, 22);

An upper air outlet (22a) that is provided at an upper portion of the main casing (21, 22) and blows out air for air conditioning from the fan (8);

A lower outlet (22b) provided at a lower portion of the main casing (21, 22) for blowing out air for air conditioning from the fan (8);

A shutter (30) for opening and closing the lower outlet (22b);

A shutter drive unit (31) for driving the shutter (30);

With

The shutter drive unit (31) drives the shutter (30) after stopping the operation of the fan (8) or immediately before stopping the operation of the fan (8), thereby An air conditioner characterized in that 22b) is fully opened.

[2] In the air conditioner according to claim 1,

In the main casing (21, 22), there is provided a lower blowing passage (P2) for guiding air for air conditioning from the fan (8) to the lower blowing outlet (22b),

The shutter (30) rotates about an axis provided on the lower side of the lower blowing passage (P2),

A part of the lower wall surface of the wall surface forming the lower blowing passage (P2) is formed by the side surface of the shutter (30) when the shutter (30) is fully opened. Harmony machine.