JP3280587B2 - Indoor unit of air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an indoor unit of an air conditioner having a deodorizing function.

[0002]

2. Description of the Related Art Hitherto, as a deodorizing method in which an air conditioner is capable of regenerating deodorizing means, a method for regenerating by applying electric current has been commercialized and disclosed in Japanese Patent Application Laid-Open No. 7-158876. One conventional example will be described with reference to FIG. In Figure 3, in the indoor unit of the air conditioner, the heat exchanger 111, the blowing means 112 are disposed, deodorizing between the heat exchanger 111 and the blower unit 112 Unit 1
01 is arranged. During operation of the air conditioner, the indoor air is sucked from the suction port 110, the heat exchanger 111, the deodorizing unit 101, through the blowing means 112, air outlet 113
From the room.

An adsorbent and a noble metal-based oxidation catalyst are supported on the surface of the resistance heating element in the deodorization unit 1, and the adsorption and deodorization are usually carried out at normal temperature. By heating to 300 ° C. or more, the odor component adsorbed on the surface is oxidized and decomposed to regenerate the adsorption performance.

On the other hand, a method using a photocatalyst using an ultraviolet lamp is disclosed in Japanese Patent Application Laid-Open No. 8-128662, which is described as a second conventional example with reference to FIG.
In FIG. 4, in the indoor unit 201 of the air conditioner,
Heat exchanger 202, disposed blowing fan 203, disposing the ultraviolet regeneration deodorizer 213 between the heat exchanger 202 and blowing fan 203.

[0005] Then, when the air conditioner operation, indoor air is sucked from the suction port 205, the heat exchanger 202, an ultraviolet regeneration deodorizer 213, through the blower fan 203,
The air is blown into the room from the air outlet 206. The ultraviolet regeneration deodorizer 213 is composed of a current plate carrying a photocatalyst and an ultraviolet lamp.

[0006]

In the first conventional example (deodorization method using heating and regeneration by energization) as described above,
Approximately 3 resistance heating elements are used for heating and regeneration of the resistance heating elements.
It is necessary to raise the temperature to 00 ° C. or higher, and the surrounding temperature rises unnecessarily. Therefore, there is a problem that the cost is increased due to the problem of the heat-resistant temperature of the material, and there is a high risk in terms of safety.

In the second conventional example (deodorization method using a photocatalyst using an ultraviolet lamp), since the contact area between the photocatalyst and room air is small, a sufficient contact time between the odorous gas and the photocatalyst cannot be obtained. The problem had arisen.

Further, in both the first conventional example and the second conventional example, the heat exchanger provided in the air passage occupies most of the ventilation resistance during operation , and is operated when only deodorization is performed. There was a large ventilation resistance due to the heat exchanger not being used, consuming extra power. It should be noted that the period in which only the deodorizing operation, the spring is not carried out the air conditioning, and half of the fall, etc., is estimated to be quite long even during the cooling and heating period, energy-saving on, the ventilation resistance of the heat exchanger has been a problem.

An object of the present invention is to provide an indoor unit of an air conditioner that can perform an efficient deodorizing operation with low ventilation resistance.

[0010]

SUMMARY OF THE INVENTION An indoor unit of an air conditioner according to the present invention solves the above-mentioned problems, and has a second air passage different from the first air passage, and a second air passage. A deodorizer composed of a photocatalyst or a photocatalyst and an adsorbent is applied to the surface of a second blower fan disposed inside or the surface of the casing of the second blower passage to form a deodorant film, and the deodorant film is further regenerated. UV lamp is provided.
According to the above configuration, the odor contained in the room air comes into contact with and is adsorbed by the deodorizing film. The adsorbed odor is decomposed into carbon dioxide and water at room temperature by the oxidizing action of the photocatalyst, becomes odorless and separates from the catalyst film to regenerate the catalyst film.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an indoor unit of an air conditioner according to the present invention will be described.

<First Embodiment> FIG. 1 shows a first embodiment of the present invention.
It is sectional drawing of the indoor unit which shows embodiment. FIG.
As shown in (1), the indoor air is supplied from a first air suction port A formed on the side surface of the indoor unit and a first air suction port B formed on the upper surface of the indoor unit by driving the first blower fan 1. And a first air passage that blows out the heat-exchanged air from a first air outlet C formed in a lower portion of the indoor unit after the indoor air sucked in by the heat exchanger 2 is exchanged.

Further, the indoor unit is provided with a second air passage composed of a second air suction port D, a second air blower fan 3, and a second air outlet E. Further, the second air inlet D is formed below the first air inlet A, and the second air outlet is formed above the first air outlet C. In addition, a photocatalyst (titanium oxide or the like) or a deodorant composed of a photocatalyst and an adsorbent is applied to the surface of the second blower fan 3 or the surface of the casing 6 constituting the second blower passage to remove the deodorant film. And an ultraviolet lamp 4 for irradiating the deodorizing film with ultraviolet light is provided in the second air passage. Also,
On the back surface of the ultraviolet lamp 4, there is provided a reflection plate 5 made of aluminum or the like that reflects ultraviolet light and irradiates the deodorant. The second blower fan 3 and the casing 6 forming the second blower path are formed using a resin or a metal that is not deteriorated by ultraviolet rays.

Then, while the air sucked from the second air suction port D passes through the second blower fan 3 or the second blower passage, the odor component is adsorbed on the photocatalyst. Then, when ultraviolet rays are irradiated from the ultraviolet lamp 4, the photocatalyst is excited, and the odor component is decomposed into carbon dioxide gas, water and the like by the oxidative decomposition action of the photocatalyst, and the deodorizing film is regenerated. In addition, when only the regeneration of the deodorizing film is performed without performing the deodorizing operation, only the rotation of the second blowing fan is performed, and the entire deodorizing film formed on the surface of the blowing fan can be regenerated.

Further, the second blower fan can be used in the indoor unit as an auxiliary to the first blower fan. Specifically, during the heating operation, since the high-temperature air blown from the first air outlet is prevented from rising upward in the room by buoyancy, the first blower fan and the second blower fan are simultaneously operated. By flowing the high-temperature air downward, the heating effect near the floor can be improved.

[0016] According to the first embodiment, the indoor air deodorization, because does not pass through the heat exchanger 2 can be performed safely deodorizing maintenance-free due to the photocatalyst with a small blowing power.

<Second Embodiment> FIG. 2 is a sectional view of an indoor unit of an air conditioner according to a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the second embodiment, the first fan 1
A photocatalyst or a deodorant composed of a photocatalyst and an adsorbent is applied to the surface to form a deodorizing film, and an ultraviolet lamp 7 and an ultraviolet lamp 7 for irradiating the photocatalyst with ultraviolet light are applied to the first air passage. A reflecting plate 8 that reflects ultraviolet light and irradiates the photocatalyst is provided.

In FIG. 2, when the first blower fan is driven during the cooling or heating operation, and there is no command for the auxiliary blower operation of the second blower fan, the deodorizing operation command is issued. The second blower fan is not driven, and deodorization is performed only by the photocatalyst disposed in the first blower fan.

When a command for a deodorizing operation is input in a state in which the first blower fan is stopped without performing cooling or heating operation, the second blower fan is driven, and the second blower fan is driven.
Deodorization is performed by a photocatalyst arranged in a blower fan of the above.

According to the second embodiment, when the first blower fan is driven by a cooling or heating operation or the like, the deodorizing operation is also performed by the photocatalyst disposed in the first blower fan so that indoor air can be removed. Since the odor component is adsorbed and regenerated, the deodorizing operation can be performed without adding extra blowing power for deodorizing.

Also, without performing a cooling or heating operation,
When the first blower fan is stopped, the odor component is adsorbed and regenerated by the photocatalyst disposed in the second blower fan, so that the deodorizing operation can be performed with a small blowing power. Thus, in the second embodiment, the deodorizing operation can be performed with less energy consumption than in the first embodiment.

[0023]

According to the first aspect of the present invention, the indoor unit of the air conditioner of the present invention is configured as described above, so that the intake air passes directly to the second blower fan without passing through the heat exchanger. Therefore, the deodorizing operation can be performed with a small amount of blowing power.

According to claim 2, the second blower fan is
It can be used as an aid to the first blower fan.

According to the third and fourth aspects, the photocatalyst is formed on the surface of the second blower having a large surface area or the surface of the second air passage, so that the contact area between the photocatalyst and the odor can be increased. In addition, the removal of odor and the like become higher, and a deodorization speed which has not been achieved in the past can be obtained. Furthermore, there is no extra ventilation resistance in the ventilation path, there is no increase in fan power, and quiet deodorizing operation can be performed.

According to the fifth aspect, the first photocatalyst can efficiently perform deodorization during the cooling or heating operation.

According to the sixth and seventh aspects, when the first blower fan is driven by a cooling or heating operation or the like, deodorization is performed by the photocatalyst of the first blower fan. Low deodorizing operation can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an indoor unit of an air conditioner of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the indoor unit of the air conditioner of the present invention.

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

FIG. 4 is a cross-sectional view of an indoor unit of a second conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st ventilation fan 2 heat exchanger 3 2nd ventilation fan 4 2nd ultraviolet lamp 8 1st ultraviolet lamp A 1st air inlet (side surface) B 1st air inlet (top surface) C 1st 1 air outlet D 2nd air inlet E 2nd air outlet

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-347425 (JP, A) JP-A-8-152184 (JP, A) JP-A-7-158876 (JP, A) 36313 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 371 F24F 1/00 311

Claims (8)

(57) [Claims] And 1. A first inlet for sucking indoor air, blown heat exchanger the room air heat exchanger to draw than the first inlet, the indoor air heat-exchanged by the heat exchanger into the room In an indoor unit of an air conditioner including a first blower outlet and a first blower path including a first blower that guides the indoor air to the heat exchanger , a second inlet that sucks indoor air; A second photocatalyst that decomposes odor contained in the inhaled indoor air, a second light source that irradiates the second photocatalyst with ultraviolet light, and a second outlet that blows out deodorized indoor air into the room. An indoor unit for an air conditioner, comprising: two air passages. Wherein said above the first blowing outlet, the indoor unit according to claim 1 air conditioner, wherein the forming the second outlet. Wherein the surface of the second blower, according to claim 1, wherein or claims, characterized in that to form the second photocatalyst
3. The indoor unit of the air conditioner according to 2 . 4. A surface of the second blowing path, according to claim 1, wherein or claims, characterized in that to form the second photocatalyst
3. The indoor unit of the air conditioner according to 2 . 5. The air conditioner according to claim 1, further comprising a first photocatalyst disposed in the first air passage, and a first light source that excites the first photocatalyst. Indoor unit. In the driving state of wherein said first fan, claim and performs deodorization by the first photocatalyst 5
An indoor unit for an air conditioner according to item 1. In the stopped state of 7. The first blower, claims and performs deodorization by the second photocatalyst 5
Indoor unit of air conditioner. 8. The indoor unit of an air conditioner according to claim 5 , wherein a first photocatalyst is formed on a surface of said first blower.