JP3340688B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having an indoor unit of an air conditioner and an air conditioner having an outside air duct connected to the indoor unit. The present invention relates to an air conditioner having a possible indoor unit and an outside air duct for guiding light to outside air.

[0002]

2. Description of the Related Art A heat exchanger of an indoor unit during a cooling operation is of a type in which air is cooled by a refrigerant. Therefore, when the indoor air circulated by the blower fan passes through the heat exchanger, it is cooled and moisture in the passing air is condensed on the surface of the heat exchanger. The heat exchanger fins in the ventilation path are surface-treated, and dew water is collected in a drain pan integrated with a blower port located below the heat exchanger, and is discharged to the outside of the indoor unit by a drain pipe. In order to maintain the shape of the heat exchanger (fins are usually made of aluminum and have low strength), the ends are formed of a heat exchanger holding metal plate, and a refrigerant pipe is passed through the metal plate. In the vicinity of the metal plate, the heat exchanger pipe and an auxiliary pipe brazed to guide the refrigerant pipe of the heat exchanger, together with the heat exchanger holding metal plate and the refrigerant pipe in a state in which the tip portion is exposed, together with the indoor unit. It is built in.

[0003] The surfaces of the heat exchanger holding metal, the refrigerant pipe, and the auxiliary pipe, which are not located in the ventilation path for circulating the air by the blower fan, are also cooled by the heat of the refrigerant, and the surface comes into contact with the surrounding room air to form dew. Water drops fall on a drain pan located at the lower part (see Japanese Patent Application Laid-Open No. 9-196399).

Further, in a conventional indoor unit having an outside air introduction type ventilating function, as disclosed in Japanese Utility Model Laid-Open No. 5-8322, outside air is directly introduced into an inlet side of a heat exchanger, mixed with indoor air in advance, and heated. It has a structure that passes through an exchanger.

[0005]

In the surface state of the heat exchanger holding metal plate, the refrigerant pipe, and the auxiliary pipe of the above-mentioned prior art, the water droplet grows until it approaches a hemisphere due to the surface tension of the dew condensation water, and then moves and falls. Therefore, the water may not fall right down to the drain pan, which is a receiver for the dew condensation water, and may be scattered without falling down. As a result, a problem that water drops from the indoor unit to the outside occurs.

Further, in the conventional ventilation, the unclean air of the outside air is directly guided into the room, and even if the room ventilation is performed, a great effect cannot be obtained. Although air cleaning can be performed by the indoor unit, it is inefficient to perform air cleaning after introducing air that is not clean into the room. Further, in the conventional type in which the air to be ventilated (intake of outside air) is located on the upstream side of the heat exchanger during the heating operation, the warm air flowing out of the indoor unit outlet is too warm, and discomfort cannot be suppressed.

[0007] The present invention has a ventilation function for preventing the dew condensation water in the indoor unit from scattering without adding a part such as a sealing material, and for reducing organic matter in the air in advance in the duct at the time of introducing outside air to guide the organic matter into the room. An object of the present invention is to provide an air conditioner having the same.

[0008]

According to the present invention, there is provided a heat exchanger comprising a refrigerant pipe and fins, at least one end of which is reinforced and held by a metal plate other than a fin material, and the refrigerant is supported by an auxiliary pipe. An air conditioner including an indoor unit that guides a pipe to the outside and circulates air exchanged by a blower fan into a room, and an external air duct that is connected to the indoor unit and that opens an opening outside to take in outside air for ventilation. It is. Then, the indoor unit before Symbol heat exchanger holding the metal plate, each surface of the refrigerant pipe and the auxiliary pipe covered with a photocatalyst layer
The outside air duct reflects its rays
Mirror finish or mirror finish
The light propagating in the duct is applied to the photocatalyst layer in the indoor unit.
An external light opening for irradiating is provided on the indoor unit side.
And said that you are.

[0009]

[0010] The present invention, said an air conditioner, the outdoor air duct, a condensing unit capable of guiding light, including sunlight ultraviolet therein, incorporated into at least either the outdoor air and the outdoor side It is characterized by that.

[0011] The present invention, wherein an air conditioner, the outdoor air duct, characterized in that attached the closing valve by the electronic control to the inlet inner intake air.

The present invention, wherein an air conditioner, the outdoor air duct, characterized in that the coating material and photocatalyst.

The present invention, wherein an air conditioner, the outdoor air duct, bending the shape of the portion, characterized in that the concentric larger bending curved or C-cut linear shape of the inner bend radius.

The present invention, wherein an air conditioner, an inlet indoor side of the outside air duct the external light open mouth,
Positioned outside the ventilation path for indoor air circulation by the blower fan
And air is sucked into the ventilation path by the electronically controlled on-off valve.
It is characterized by having made it. And, the external light release
The mouth is the heat exchanger holding metal plate located outside the ventilation path ,
It is characterized by being disposed at a position facing the refrigerant pipe and the auxiliary pipe via a transparent shielding plate.

[0015]

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating an air conditioner according to the present invention. The air conditioner includes an indoor unit 19 installed indoors, an outdoor unit 20 installed outdoors, a refrigerant pipe 21 connected to the indoor units 19 and the outdoor units 20, and an outside air that takes in outside air into the indoor units 20. This is a structure including the duct 11. The indoor unit 19 and the outdoor unit 20 are respectively installed with a wall 23 interposed therebetween, and the refrigerant pipe 21 passes through a pipe hole 24 penetrating through the wall 23.
And the outdoor unit 20. The outdoor air duct 11 extends from the indoor unit 19 to the upper surface of the outdoor unit 20 through the piping hole 24 . An outside air inlet 14 having an outside air opening / closing valve 13 is provided at a distal end portion horizontally protruding from the piping hole 24, and further, a light condensing portion 22 formed of a lens is provided at an upper end of the outdoor unit 20. . Outer duct 11, the inner surface has been mirror-finished, the light are also available propagate efficiently in the outside air duct 11. As shown in FIG.
By making the cross section of the bent portion 11-2 of the outside air duct 11 a C-cut surface or a large R surface, the efficiency of moving the collected light is improved.

Next, with reference to FIGS. 2 to 7, illustrating the indoor unit 19. As shown in FIG. 2 , the exterior part of the indoor unit 19 includes a cabinet 1 that houses each unit, a front panel 2, a drain pan 4 located below, and a louver 5. The front panel 2 has a grill portion for taking in room air. As shown in FIG. 3 , an auxiliary pipe 6 for guiding the refrigerant pipe to the outside and an outside air duct 1
1 extends outside from the cabinet 1. On the back of the cabinet 1, an indoor outdoor air duct 11-3 is further attached.

As shown in FIG. 5 to FIG.
Heat exchanger 3, heat exchanger holding metal plate 3-1 holding heat exchanger 3 , refrigerant pipe 3-2, fin portion 3-3, auxiliary pipe 6, outside light opening 7, blower motor 8, electrical box 9 , A blower fan 10 rotated by a blower motor 8, a ventilation valve 15
-1, ventilation valve 15-2, installation plate 16, heat exchange partition plate 17,
An air filter 18 is provided. The heat exchanger holding metal plate 3-1, the refrigerant pipe 3-2, and the auxiliary pipe 6 at the end of the indoor heat exchanger 3 of the indoor unit 19 are coated with a photocatalyst. The photocatalyst 12 is also provided on the inner surface of the outside air duct 11 (including the outdoor part and the indoor unit outside air duct 11-3).
Is coated.

The indoor air passes through a grill portion of the front panel 2 by a blower fan 10, and large dust and dirt are removed by an air filter 18, heat is exchanged by an indoor heat exchanger 3, and the air is blown from a lower outlet of a drain pan 4. It is heat-exchanged and returned to the room. At this time, the fin portion 3-3 in the ventilation path section of the indoor heat exchanger 3 during cooling, the heat exchanger holding metal plate 3-1 not in the ventilation path section, the refrigerant pipe 3-2, the auxiliary pipe 6
Is cooled by the heat of the refrigerant, and the surface condenses. Fin 3
In the case of -3, the dew water smoothly flows down to the tray of the drain pan 4 by the surface treatment. If the heat exchanger holding metal plate 3-1, the refrigerant pipe 3-2, and the auxiliary pipe 6 are not surface-treated as before, the dew condensation water loses its balance with gravity due to its surface tension. It becomes a growing water drop. For this reason, the large water droplet that has grown falls naturally and collides with another refrigerant pipe 3-2 or a part of the structure during the fall and scatters. However, in the present embodiment, the photocatalyst coating is applied, and the water droplets flow down without growing, and are guided to the tray of the drain pan 4. At this time, even if it touches another object, the amount is small and it does not scatter outside.

The photocatalyst can receive light of an ultraviolet wavelength and maintain its function for a long time. Therefore, in the present invention, light is emitted to the photocatalyst coating portion from the outside light opening 7 of the indoor unit 19 by using the outside air duct 11 for ventilation. The indoor unit side inlet of the outside air duct is an outside light opening 7, and is disposed at a position facing the heat exchanger holding metal plate 3-1, the refrigerant pipe 3-2 and the auxiliary pipe 6 via a transparent shielding plate. Have been. This shielding plate is made of a material that can transmit ultraviolet light well. Since the shielding plate is fitted in the cabinet 1, there is no light loss. Thus, the light taken in from the condensing part 22 propagates in the outside air duct, and the outside light opening 7
From inside the indoor unit. When this light impinges on the photocatalyst coated on the heat exchanger holding metal plate 3-1, the refrigerant pipe 3-2 and the auxiliary pipe 6, the hydrophilicity of the characteristics of the photocatalyst is secured without a special light source, Water drops due to the surface tension of the water cannot be formed, and the water drops can be prevented from falling indoors. Further, at night, the light of the fluorescent lamp which enters from the grill portion of the front panel 2 can be used, but the effect can be sufficiently maintained without receiving the light for 24 hours.

The outside air duct 11 shares a through-hole pipe hole 24 through which the refrigerant pipe 21 passes, and one end thereof is connected to the indoor unit 1 described above.
9 is an outside light opening 7 and the other end is an outside air intake 14
It is. The outside light opening 7 is arranged outside the ventilation path for indoor air circulation by the blower 10. Then, when air is to be taken into the ventilation path, at least one of the ventilation valve 15-1 or the ventilation valve 15-2, which is an opened electronically controlled on-off valve, is opened. By the force of the blower fan 10 of the indoor unit 19, the outside air supplied from the outside light opening 7 is
It is taken into the ventilation path from 5-1 or the ventilation valve 15-2. At this time, the controller in the electrical unit BOX 9 instructs the outside air on-off valve 13 in the outside air inlet 14 at the end of the outside air duct 11 or in the middle to be in the open state, and the open state so that air can freely enter from the inlet 14. Has become.

The outside air taken into the outside air duct 11 is
It passes through a photocatalyst-coated outside air duct 11 and an indoor unit outside air duct 11-2. At this time, the photocatalyst has an effect of decomposing organic dust, dust and the like by the external ultraviolet light power. Therefore, the outside air is purified by passing through the outside air duct 11, and the ventilation valves 15-1 and 15-1, 1
The air enters the ventilation path through the opening 5-2 and is blown out into the room.

At the time of heating, by opening the ventilation valve 15-2, the outside air slightly humidifies the indoor air heated by the heat exchanger 3, and the warm air blown out from the indoor unit 19 outlet is reduced to a suitable level. During cooling, the ventilation valve 15-
1 is opened, the outside air is dehumidified by a heat exchanger, and then blown into the room. At this time, since the indoor unit 19 has the above-described structure, a large amount of dew is generated due to the outside air containing a large amount of moisture during cooling, and a situation does not occur in which dew condensation water flows out to the outside.

FIG. 8 is a schematic configuration diagram showing another embodiment of the air conditioner according to the present invention. A light condensing part 22 is formed at a horizontal end protruding from a piping hole of the outside air duct, and an outside air inlet 14 protruding downward from the middle. Other parts and operations are the same as those described above, and a description thereof will be omitted.

[0025]

According to the present invention, a heat exchanger holding metal plate,
Since the surfaces of the refrigerant pipe and the auxiliary pipe were covered with the photocatalytic layer, the water droplets condensed on the surface lost the surface tension of the water and did not change into large polka dots. It will not be scattered or fall to the outside of a part of a pipe or structure.

According to the present invention, the inner surface of the outside air duct is mirror-finished or mirror-coated so as to reflect light rays well, so that not only outside air but also light rays containing ultraviolet rays are propagated into the indoor unit and hit on the photocatalyst. The above photocatalytic function is ensured.

According to the present invention, the outside air duct incorporates a light collecting portion capable of guiding light including ultraviolet rays such as sunlight into the inside of the outside air duct at least on either the outside air side or the outdoor side. A lot of light can be introduced, and the photocatalytic effect in the indoor unit can be increased.

According to the present invention, the electronically controlled on-off valve is mounted inside the outside air intake, so that unnecessary dust and dust can be prevented from entering the outside air duct, and the amount of light and air passed can be secured. it can.

According to the present invention, since the coating material of the outside air duct is used as a photocatalyst, it is possible to decompose organic substances adhering to the inner surface of the duct and to eliminate the mirror fogging by the hydrophilic function, and to send the light to the indoor unit at the back with almost no light quantity. In addition, the sucked air is also decomposed and removed from the organic matter and sent to the indoor unit.

According to the present invention, the shape of the bent portion of the outside air duct is such that the bent portion has a bent curved surface larger than a concentric circle of the inner bent diameter or C.
Since the cut linear shape is used, light can be efficiently transmitted to the indoor unit.

According to the present invention, the indoor unit-side intake of the outside air duct is disposed at the position facing the heat exchanger holding metal plate, the refrigerant pipe and the auxiliary pipe via the transparent shielding plate. By irradiating the light to the photocatalyst of the indoor unit, the hydrophilicity of the characteristics of the photocatalyst is ensured even without a special light source, so that water droplets cannot be formed due to the surface tension of water, and the water droplets can be prevented from falling into the room.

According to the present invention, the indoor unit side intake of the outside air duct is located outside the ventilation path, and the outside air is sucked into the ventilation path by the electronically controlled on-off valve. In addition, by taking in the outside air from which organic impurities have been removed by the photocatalytic effect of the outside air duct, mild warm air can be blown into the room at the time of heating. Can give pleasure.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an air conditioner according to the present invention.

FIG. 2 is a front perspective view of the indoor unit.

FIG. 3 is a rear perspective view of the indoor unit.

FIG. 4 is a sectional view of a bent portion of the outside air duct.

FIG. 5 is a perspective view of the indoor unit from which a front panel is removed.

FIG. 6 is a vertical sectional view of a central portion of the indoor unit.

FIG. 7 is a longitudinal sectional view of the indoor unit of the heat exchanger holding metal plate portion.

FIG. 8 is a schematic configuration diagram showing another embodiment of the air conditioner according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet 2 Front panel 3 Indoor heat exchanger 3-1 Heat exchanger holding metal plate 3-2 Refrigerant pipe 3-3 Fin part 4 Drain pan 6 Auxiliary pipe 7 Outside light opening 8 Air blower motor 10 Blower fan 11 Outside air duct 11- 2 Outside Air Duct Bend 11-3 Indoor Unit Outside Air Duct 12 Photocatalyst 13 Outside Air On / Off Valve 14 Outside Air Inlet 15-1 Ventilation Valve 15-2 Ventilation Valve 19 Indoor Unit 20 Outdoor Unit 21 Refrigerant Pipe 22 Light Collector 23 Wall 24 Wall Penetration Piping hole

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-62085 (JP, A) JP-A-10-318696 (JP, A) JP-A-9-196399 (JP, A) JP-A-9-96 61746 (JP, A) JP-A-9-225263 (JP, A) JP-A-10-61051 (JP, A) JP-A-10-24216 (JP, A) JP-A-63-161404 (JP, A) JP-A-9-133378 (JP, A) JP-A-8-28902 (JP, A) JP-A-5-8322 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 361 F24F 1/00 431 F24F 5/00 F28F 1/32

Claims (7)

(57) [Claims] 1. A heat exchanger comprising a refrigerant pipe and fins, wherein at least one end of the heat exchanger is reinforced and held by a metal plate other than a fin material, and the auxiliary pipe guides the refrigerant pipe to the outside. the indoor unit for circulating air heat-exchanged in the indoor, out an opening in the outside is connected to the indoor unit, the air conditioner and a fresh air duct for taking in outside air for ventilation, prior to said indoor unit mirror serial heat exchanger holding the metal plate, each surface of the refrigerant pipe and the auxiliary pipe is covered with a photocatalyst layer, said outside air duct, the inner surface, which reflects well the light
Surface finish or mirror coating, open air duct
Irradiating the photocatalyst layer in the indoor unit with light propagated in the interior
An air conditioner is provided with an outside light opening for opening the indoor unit. 2. The outside air duct has an ultraviolet ray such as sunlight therein.
At least outside air must be able to guide light including
2. The air conditioner according to claim 1, wherein the air conditioner is incorporated in either the side or the outdoor side . 3. The outside air duct is connected to the inside of the outside air intake.
The air conditioner according to claim 1 or 2 , further comprising an on-off valve controlled by a child control . 4. The outside air duct is provided with the coating material.
Claims 1, characterized in that the photocatalyst to air conditioner according to any one of the three. 5. The outside air duct has a shape of a bent portion,
Bending surface larger than concentric circle of inner bending diameter or C-cut straight line
The air conditioner according to any one of claims 1 to 4, wherein the air conditioner is formed in a shape . 6. An indoor unit-side intake of the outside air duct.
The outside light opening is connected to the indoor air circulation by the blower fan.
Located outside the ventilation path for the ring and ventilated by an electronically controlled on-off valve
The air conditioner according to any one of claims 1 to 5 , wherein outside air is sucked into the passage. 7. The outside light opening is located outside a ventilation path.
That the heat exchanger holds a metal plate, and the refrigerant pipe and an air conditioner of claim 6, wherein this <br/> and disposed through a transparent shield in a position facing the auxiliary pipe.