JP2007085703A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize corrosion of a fin under an environment wherein aluminum or aluminum alloy fin corrodes easily. <P>SOLUTION: This air conditioner 1, 101, 120 comprises an outside air introduction tube 8, 148, a heat exchanger 11, 132, a hydrophobic film 11d and a hydrophilic film 11e. The outside air introduction tube is piping for introducing the outside air into a room as supply air. The heat exchanger is mounted at a downstream side in the supply air flowing direction. The heat exchanger has a heat transfer tube and the fin 11a. The fin is made of aluminum or aluminum alloy, and mounted on the heat transfer tube. The fin is coated with the hydrophobic film. Further the hydrophilic film is formed on the hydrophobic film. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner provided with an outside air introduction function, an oxygen enrichment function, a humidification function, and the like.

In the past, in order to improve the corrosion resistance of aluminum fins coated with a hydrophilic film, a technique of “forming a hydrophobic film between the fin body and the hydrophilic film” has been proposed (for example, Patent Document 1).
JP-A-62-278033

By the way, in recent years, an air conditioner is provided with an outside air introduction function, an oxygen enrichment function, a humidification function, and the like, and the heat exchanger fins are more easily corroded.
An object of the present invention is to suppress fin corrosion as much as possible in an environment in which aluminum and aluminum alloy fins are easily corroded.

  An air conditioner according to a first aspect of the present invention includes an outside air introduction pipe, a heat exchanger, a hydrophobic film, and a hydrophilic film. The outside air introduction pipe is a pipe for introducing outside air into the room as supply air. The heat exchanger is disposed downstream in the supply air flow direction. And this heat exchanger has a heat exchanger tube and a fin. The fin is made of aluminum or aluminum alloy, and is attached to the heat transfer tube. And this fin is coat | covered with the hydrophobic membrane | film | coat. Further, a hydrophilic film is formed on the hydrophobic film.

This air conditioner has an outside air introduction pipe, and the heat exchanger is arranged downstream in the supply air flow direction. The fins of this heat exchanger are made of aluminum or aluminum alloy. For this reason, this air conditioner is in an environment where fins are more easily corroded than conventional air conditioners by nitrogen oxides, sulfur oxides and the like released into the outside air.
However, in this air conditioner, since the fin is covered with the hydrophobic film, the fin is difficult to come into contact with water, oxygen, nitrogen oxide, sulfur oxide, and the like. For this reason, this air conditioner is in an environment where the fins are more easily corroded than the conventional air conditioner, but can effectively suppress the corrosion of the fins.

  Further, in this air conditioner, since the hydrophilic film is formed on the hydrophobic film, the condensed water generated in the heat exchanger functioning as an evaporator can be led to the drain pan in an orderly manner.

An air conditioner according to a second aspect of the present invention is the air conditioner according to the first aspect of the present invention, further comprising an oxygen enrichment unit. The oxygen enrichment unit is a device for concentrating oxygen contained in the outside air, and is provided upstream of the outside air introduction pipe in the supply air flow direction.
The air conditioner further includes an oxygen enrichment unit. For this reason, in this air conditioner, the fins are more susceptible to corrosion.
However, in this air conditioner, since the fin is covered with the hydrophobic film, the fin is difficult to come into contact with water, oxygen, nitrogen oxide, sulfur oxide, and the like. Even if the oxygen concentration in the air conditioner is improved, the corrosion of the fins can be sufficiently suppressed if water, oxygen, nitrogen oxides, sulfur oxides, and the like do not reach the fins. For this reason, this air conditioner is in an environment in which the fins are more easily corroded, but can effectively suppress the corrosion of the fins.

An air conditioner according to a third aspect is the air conditioner according to the first aspect or the second aspect, further comprising a humidifying unit. The humidification unit is a device that increases the humidity of the outside air, and is provided on the upstream side of the outside air introduction pipe in the supply air flow direction.
The air conditioner further includes a humidification unit. For this reason, in this air conditioner, the fins are more susceptible to corrosion.

  However, in this air conditioner, since the fin is covered with the hydrophobic film, the fin is difficult to contact with water. If water does not reach the fins even when the humidity in the air conditioner is improved, the corrosion of the fins can be sufficiently suppressed. For this reason, this air conditioner is in an environment in which the fins are more easily corroded, but can effectively suppress the corrosion of the fins.

An air conditioner according to a fourth aspect of the present invention is the air conditioner according to any of the first to third aspects of the present invention, further comprising a discharge unit. The discharge unit is provided in the vicinity of the heat exchanger.
In this air conditioner, the discharge unit is provided in the vicinity of the heat exchanger. In general, when discharge occurs, the reaction of water, oxygen, nitrogen oxide, sulfur oxide, and the like with oxygen and aluminum or an aluminum alloy is promoted. That is, in this air conditioner, the fins are more easily corroded than the conventional air conditioner.

  However, in this air conditioner, since the fin is covered with the hydrophobic film, the fin is difficult to come into contact with water, oxygen, nitrogen oxide, sulfur oxide, and the like. If water, oxygen, nitrogen oxides, sulfur oxides, and the like do not reach the fins even if discharge is performed in the vicinity of the fins, corrosion of the fins can be sufficiently suppressed. For this reason, this air conditioner is in an environment in which the fins are more easily corroded, but can effectively suppress the corrosion of the fins.

The air conditioner according to the first aspect of the present invention has an environment in which the fins are more easily corroded than the conventional air conditioner, but can effectively suppress the corrosion of the fins. Further, in this air conditioner, since the hydrophilic film is formed on the hydrophobic film, the condensed water generated in the heat exchanger functioning as an evaporator can be led to the drain pan in an orderly manner.
The air conditioner according to the second aspect of the present invention is an environment in which the fins are more easily corroded, but can effectively suppress the corrosion of the fins.

The air conditioner according to the third aspect of the present invention is an environment in which the fins are more easily corroded, but the fin corrosion can be effectively suppressed.
The air conditioner according to the fourth aspect of the present invention is an environment in which the fins are more easily corroded, but can effectively suppress the corrosion of the fins.

Hereinafter, embodiments of an air-conditioning apparatus according to the present invention will be described based on the drawings.
<First Embodiment>
[Configuration of air conditioner]
FIG. 1 is an external view of an air conditioner 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing the arrangement of devices in the indoor unit 2 and the outdoor unit 3 of the air-conditioning apparatus 1 according to the embodiment of the present invention.

  The air conditioner 1 is divided into an indoor unit 2 attached to an indoor wall surface U (see FIG. 2) and the like and an outdoor unit 3 installed outdoors. As shown in FIG. 2, the outdoor unit 3 includes an outdoor refrigerant unit 4 and an optional unit 15. The optional unit 15 includes a humidification unit 5 and an oxygen enrichment unit 6. The indoor unit 2 and the outdoor unit 3 are connected to the refrigerant circuits of both units via a refrigerant pipe 7. In addition, the indoor unit 2 and the outdoor unit 3 are used when supplying heated air from the humidifying unit 5 or humidified air or oxygen-enriched air from the oxygen-enriched unit 6 to the indoor unit 2 side. Connected by. In the present embodiment, the optional unit 15 is arranged so as to be superimposed on the upper side of the outdoor refrigerant unit 4 so that the installation space does not increase. The air supply pipe 8 is connected to the side surface, the front surface, the back surface, and the like of the humidifying unit 5, and is connected to the indoor unit 2 through the indoor wall surface U. Here, the supply pipe 8 having an inner diameter of about 20 mm to 30 mm is used. Hereinafter, the arrangement of devices in each unit and the configuration of the refrigerant circuit will be described in detail with reference to FIGS.

(1) Indoor unit The indoor unit 2 is provided with an indoor heat exchanger 11. This indoor heat exchanger 11 is a cross fin tube type heat exchanger panel composed of a heat transfer tube configured by connecting a plurality of hairpin-shaped tubes and a plurality of fins through which the heat transfer tubes are inserted. Heat is exchanged between the refrigerant that is supplied to the indoor heat exchanger 11 through the refrigerant pipe 7 and flows through the heat transfer tubes, and the air that contacts the heat transfer tubes and the fins. The fins are made of aluminum or an aluminum alloy, and are subjected to anticorrosion treatment described in detail later.
In the indoor unit 2, an indoor fan 12 and an indoor fan motor 13 that rotationally drives the indoor fan 12 are provided. The indoor fan 12 is a cylindrical cross-flow fan having a large number of blades on the peripheral surface, and generates an air flow in a direction intersecting the rotation axis. The indoor fan 12 sucks indoor air into the indoor unit 2 and blows out air after heat exchange with the refrigerant flowing in the heat transfer tube of the indoor heat exchanger 11 into the room. Furthermore, the pipe end of the air supply pipe 8 is inserted into the indoor unit 2 so that heated air supplied from the humidifying unit 5 or humidified air or oxygen-enriched air supplied from the oxygen-enriched unit 6 is contained in the room. After being blown out once into the unit 2, it is blown into the room by the indoor fan 12 together with the air sucked from the room (see FIG. 2).
Further, as shown in FIG. 2, an air cleaning unit 70 is provided in the indoor unit 2. The air cleaning unit 70 is disposed on the front side of the indoor heat exchanger 11 and includes a discharger 71, a primary filter 72, and a secondary filter 73 as shown in FIG. These element parts are stored in the unit casing 74. As shown in FIG. 3, the discharger 71 mainly includes a counter electrode 712, an ionization line 711, and a streamer discharge electrode 713. As shown in FIG. 4, the counter electrode 712 is a metal plate having a square-wave cross section, and includes a real electrode portion 712a that substantially functions as an electrode and a plurality of slit portions 712b. The slit part 712b plays the role of flowing air sucked from the front surface (see the white arrow F3 in FIG. 2) to the indoor heat exchanger 11 side. The ionization line 711 is arrange | positioned in the air flow direction upstream of the counter electrode 712, as FIG. 3 shows. In addition, the ionization line 711 is arrange | positioned 1 each between the real electrode parts 712a. In addition, the ionization line 711 is formed of a fine diameter tungsten wire or the like and used as a discharge electrode. As shown in FIG. 5, the streamer discharge electrode 713 includes an electrode bar 713a and a needle electrode 713b. The needle electrode 713b is fixed so as to be substantially orthogonal to the electrode rod 713a. As shown in FIG. 3, the streamer discharge electrode 713 is disposed on the downstream side of the counter electrode 712 in the air flow direction so that the needle electrode 713 b faces the actual electrode portion 712 a of the counter electrode 712. Of these electrodes 711, 712, and 713, the counter electrode 712 and the ionization line 711 serve to charge relatively small dust floating in the air that has passed through the prefilter 75 (see FIG. 3). Bear. Specifically, when a high voltage is applied between the ionization line 711 and the actual electrode portion 712a to generate a discharge between the electrodes 711 and 712, dust or the like passing between the electrodes 711 and 712 is positively charged. Is charged. The charged dust is supplied rearward through the slit portion 712b and is electrostatically adsorbed by an electrostatic filter 720 described later. At this time, since viruses and bacteria contained in the dust are also charged, the efficiency of adsorbing the viruses and bacteria to titanium apatite (described later) increases. On the other hand, the counter electrode 712 and the streamer discharge electrode 713 play a role of generating active species to be supplied to a titanium apatite-carrying filter 721 described later. Specifically, when a DC, AC, or pulse discharge voltage is applied between the streamer discharge electrode 713 and the counter electrode 712, a streamer discharge as shown in FIG. When streamer discharge occurs, low-temperature plasma is generated in the discharge field. This low-temperature plasma generates radical species such as fast electrons, ions, ozone, and hydroxy radicals, and other excited molecules (excited oxygen molecules, excited nitrogen molecules, excited water molecules). These active species are supplied to a titanium apatite-carrying filter 721 (described later) along the air flow. Note that these active species have a very high energy level and are relatively small such as ammonia, aldehydes, and nitrogen oxides contained in the air even before reaching the titanium apatite-carrying filter 721 (described later). Has the ability to decompose and deodorize organic molecules. A part of a sectional view of the primary filter 72 is shown in FIG. The primary filter 72 is formed by bonding an electrostatic filter 720 and a titanium apatite-carrying filter 721 together. The primary filter 72 is arranged so that the electrostatic filter 720 faces the upstream side in the air flow direction and the titanium apatite-carrying filter 721 faces the downstream side in the air flow direction. The electrostatic filter 720 adsorbs dust or the like charged by the discharger 71. As shown in FIG. 8, the titanium apatite-carrying filter 721 is made of polypropylene fiber (hereinafter referred to as PP fiber) 722 carrying titanium apatite particles 725, and adsorbs dust and the like passing through the electrostatic filter 720. To do. As shown in FIG. 8, the PP fiber 722 includes a core 723 made of polypropylene and a coating layer 724 made of polypropylene, and is supported on the coating layer 724 so that the titanium apatite particles 725 are exposed to the air side. Has been. Titanium apatite is apatite in which some calcium ions of calcium hydroxyapatite are replaced with titanium ions by a technique such as ion exchange. This titanium apatite has the property of specifically adsorbing viruses, molds, bacteria, etc. contained in dust and the like. The titanium apatite has a photocatalytic function activated by the active species supplied from the discharger 71, and decomposes, kills, or inactivates viruses, molds, bacteria, and the like. The secondary filter 73 carries anatase type titanium dioxide. The secondary filter 73 adsorbs viruses and fungi in the air that have not been adsorbed by the primary filter 72. In the secondary filter 73, the adsorbed bacteria and viruses are killed or inactivated by the titanium dioxide activated by the active species.

(2) Outdoor Refrigerant Unit As shown in FIG. 9, the outdoor refrigerant unit 4 includes a compressor 21, a four-way switching valve 22 connected to the discharge side of the compressor 21, and a suction side of the compressor 21. An accumulator 23 to be connected, an outdoor heat exchanger 24 connected to the four-way switching valve 22, and an electric expansion valve 25 connected to the outdoor heat exchanger 24 are provided. The outdoor heat exchanger 24 is a cross fin tube type heat exchanger panel including a heat transfer tube configured by connecting a plurality of hairpin-shaped tubes and a plurality of fins through which the heat transfer tubes are inserted. It arrange | positions so that the back surface and side surface of the refrigerant | coolant unit 4 may be adjoined. The electric expansion valve 25 is connected to a liquid side communication pipe 32 via a filter 26 and a liquid closing valve 27, and is connected to one end of the indoor heat exchanger 11 via this liquid side communication pipe 32. The four-way switching valve 22 is connected to the gas side communication pipe 31 via the gas closing valve 28, and is connected to the other end of the indoor heat exchanger 11 via the gas side communication pipe 31. These communication pipes 31 and 32 correspond to the refrigerant pipe 7 in FIGS. 1 and 2. Further, in the outdoor refrigerant unit 4, in order to discharge the air after heat exchange by the outdoor heat exchanger 24 to the outside, the air is taken in from the back and side surfaces of the outdoor refrigerant unit 4 toward the front. An outdoor fan 29 that blows out is provided. The outdoor fan 29 is a propeller fan that is rotationally driven by the outdoor fan motor 30.

(3) Humidification unit Next, the internal structure of the humidification unit 5 is demonstrated based on FIG.2 and FIG.9.
The humidifying unit 5 includes a humidifying unit casing located above the outdoor refrigerant unit 4. Inside the humidifying unit casing 50 is a humidifying unit component device 50 such as a moisture absorbing rotor 51, a heater assembly 53, a humidifying fan 54, and an adsorption fan 56. Has been placed.

  The moisture absorption rotor 51 is a honeycomb-structured ceramic rotor having a generally disc shape, and has a structure in which air can easily pass. Specifically, the rotor has a circular shape in a plan view, and has a fine honeycomb (honeycomb) shape in a cross section cut along a horizontal plane. And the outdoor air introduce | transduced through the humidification unit air inlet flow path 60 passes through many cylinder parts of the moisture absorption rotor 51 whose cross section is polygonal. The main part of the moisture absorption rotor 51 is obtained by baking an adsorbent such as zeolite, silica gel, or alumina. This adsorbent such as zeolite has the property of adsorbing moisture in the air in contact and desorbing the adsorbed moisture when heated. The hygroscopic rotor 51 can be driven to rotate by a rotor drive motor 52.

The heater assembly 53 is disposed so as to cover one surface of the substantially half portion 51 b of the moisture absorption rotor 51. The heater assembly 53 can heat the air sucked from the outside and discharge it to the hygroscopic rotor 51 side.
The humidification fan 54 is disposed on the other surface side of the substantially half portion 51 b of the moisture absorption rotor 51 and at a position corresponding to the heater assembly 53. The humidifying fan 54 is a centrifugal fan that is rotated by a humidifying fan motor 55, and an outlet thereof is connected to the air supply pipe 8 via a humidified air supply channel 58. The humidifying fan 54 is a humidified air obtained by passing through a substantially half portion 51b of the moisture absorbing rotor 51 that has adsorbed moisture, or a heated air obtained by passing through a substantially half portion 51b of the moisture absorbing rotor 51 that has not adsorbed moisture. Is sent to the air supply pipe 8 via the humidified air supply flow path 58 and supplied to the indoor unit 2. A drain pan 91 for receiving condensed water generated from the oxygen enriching unit 6 is disposed in the vicinity of the humidifying fan 54, and the condensed water accumulated in the drain pan 91 is generated by air suction of the humidifying fan 54. It evaporates by the air flow, is sent to the air supply pipe 8 through the humidified air supply flow path 58 together with the humidified air and the heated air, and is supplied to the indoor unit 2.

  The suction fan 56 is a centrifugal fan that is rotated by the suction fan motor 57 and is arranged so that outdoor air introduced through the humidification unit air inlet channel 60 can be passed through the moisture suction rotor 51. The adsorption fan 56 removes the dehumidified air obtained by adsorbing and removing moisture when passing through the substantially half portion 51 a of the hygroscopic rotor 51 through the dehumidified air discharge channel 59, and the oxygen-enriched film of the oxygen enriching unit 6. Supply to module 61.

(4) Oxygen Enriching Unit Next, the internal configuration of the oxygen enriching unit 6 will be described with reference to FIG. 2, FIG. 9, and FIG. Here, FIG. 10 is a schematic diagram of the oxygen-enriched membrane module 61.
The oxygen enrichment unit 6 includes an oxygen enrichment unit casing located on the upper side of the humidification unit 5, and the oxygen enrichment membrane module 61, the vacuum pump 65, and the secondary side of the oxygen enrichment membrane module 61 are included therein. The oxygen-enriched air suction passage 69 that connects the space S2 and the suction port of the vacuum pump 65, the humidification fan 54 and the arrangement space SP that is a space in which the humidification fan 54 and the drain pan 91 belonging to the humidification unit 5 are arranged, and the vacuum pump 65. An oxygen-enriched air supply channel 67 and the like that connect to the outlet of the gas are disposed.

  The oxygen-enriched membrane module 61 is mainly composed of a module casing 62 and an oxygen-enriched module disposed in the module casing 62 so as to divide the space in the module casing 62 into a primary space S1 and a secondary space S2. And a chemical film 63. The oxygen-enriched film 63 has a property of easily transmitting oxygen and water in the air and not easily transmitting nitrogen, in other words, a property of selectively transmitting oxygen and water.

  The primary side space S1 does not pass through the air inlet 62a into which the dehumidified air supplied from the adsorption fan 56 through the dehumidified air discharge passage 59 is introduced, and the oxygen-enriched film 63. An air discharge port 62b through which the air remaining inside is discharged is provided. A filter 64 is disposed on the air inlet 62a side of the primary side space S1. The air remaining in the primary space S1 without passing through the oxygen-enriched membrane is discharged from the air outlet 62b to the outside of the oxygen-enriched unit 6 through the oxygen-enriched unit air discharge channel 68. It is like that. The secondary space S2 is provided with an oxygen-enriched air discharge port 62c through which oxygen-enriched air having increased oxygen concentration through the oxygen-enriched film 63 is discharged.

  In FIG. 10, a single oxygen-enriched film 63 is arranged in the module casing 62 to form the primary side space S1 and the secondary side space S2. The configuration of the module 61 is not limited to this, and a plurality of primary-side spaces S1 and secondary-sides are provided by arranging a plurality of oxygen-enriched membranes made of hollow fiber membranes or plate-like membranes in the module casing. The space S2 may be formed, and the primary side spaces or the secondary side spaces may be communicated with each other so as to have a functionally similar configuration to that of FIG.

  The vacuum pump 65 is a pump for sucking the air in the primary side space S1 through the oxygen enriched film 63 and discharging the air in the secondary side space S2 to the oxygen enriched air supply channel 67. The vacuum pump 65 is driven by a pump motor 66, and in this embodiment, an oilless type is used so that lubricating oil is not mixed into the oxygen-enriched air. When the vacuum pump 65 is operated, a pressure difference is generated between the primary side space S1 and the secondary side space S2 in the oxygen enriched membrane module 61. Therefore, the primary side space S1 of the oxygen enriched membrane 63 is generated. Oxygen in the air introduced into the gas selectively passes through the secondary space S2 to obtain oxygen-enriched air. The oxygen-enriched air is discharged from the secondary space S2 by the vacuum pump 65 to the oxygen-enriched air supply channel 67 through the oxygen-enriched air suction channel 69.

The oxygen-enriched air supply channel 67 is a channel for allowing the oxygen-enriched air discharged from the oxygen-enriched membrane module 61 by the vacuum pump 65 to flow into the humidifying fan or other arrangement space SP of the humidifying unit 5. That is, the oxygen-enriched air obtained by the oxygen-enriching unit 6 is supplied to the room by the humidifying fan 54 via the air supply pipe 8.
Here, the oxygen-enriched air supply channel 67 is disposed so as to be inclined downward toward the humidifying fan or the like arrangement space SP (see the wedge symbol W in FIG. 2). Further, here, the outlet of the oxygen-enriched air supply channel 67 is arranged so as to come directly above the drain pan 91 arranged in the arrangement space SP such as the humidifying fan. As described above, since the oxygen-enriched film 63 has a property of selectively transmitting not only oxygen in the air but also water, the oxygen-enriched air generated in the secondary space S2 of the oxygen-enriched film module 61 Will contain moisture at a higher concentration than the dehumidified air supplied to the primary space S1. Therefore, there is a risk that moisture in the oxygen-enriched air may condense near the outlet of the oxygen-enriched air supply channel 67, such as during the rainy season, when the humidity of the outside air is relatively high, or in the winter when the outside air temperature decreases. high. The reason why the outlet of the oxygen-enriched air supply channel 67 is arranged to be directly above the drain pan 91 arranged in the humidifying fan or the like arrangement space SP is thus condensed water that may be generated from the oxygen-enriched air. This is because the water is accumulated in the drain pan 91.

[Anti-corrosion treatment for indoor heat exchangers]
The fin 11a of the indoor heat exchanger 11 according to the present embodiment is a flat fin as shown in FIG. The fin 11a has a structure in which an aluminum plate or an aluminum alloy plate 11b is covered with a chemical conversion film 11c as a result of the surface being oxidized by phosphoric acid or chromic acid. Further, a hydrophobic film 11d is formed on the chemical conversion film 11c, and a hydrophilic film 11e is further formed on the hydrophobic film 11d. The hydrophobic film 11d is painted for the purpose of preventing corrosion of aluminum, and the hydrophilic film 11e is painted for the purpose of condensed water falling on the drain pan along the surface.

Hereinafter, the hydrophobic film 11d and the hydrophilic film 11e will be described in detail.
(1) Hydrophobic film The hydrophobic film 11d includes, for example, vinyl resins, acrylic resins, alkyd resins, epoxy resins, urethane resins, polyester resins, styrene resins, silicone resins, fluorine resins, It is a coating film of a hydrophobic polymer such as a polyamide-based resin, a melamine-based resin, a polycarbonate-based resin, and an olefin-based resin.

  As described above, as a method of forming the hydrophobic film 11d on the fin 11a, a method of preparing a hydrophobic polymer solution and applying the solution onto the chemical film 11c by spraying or brushing or a chemical film 11c is provided. A method (dip coating method) of lifting the fin 11a after immersing it in the solution can be considered. The solvent necessary for preparing the hydrophobic polymer solution is determined by the kind of the hydrophobic polymer, and for example, methyl ethyl ketone, alcohol, water, toluene, xylene, or a mixture thereof can be used. The concentration of the hydrophobic polymer solution is preferably adjusted so that the thickness of the hydrophobic film formed upon drying is 10 μm or less, preferably 0.3 to 3 μm.

The hydrophobic polymer solution applied on the chemical conversion film 11c is appropriately dried according to the type of polymer used and the type of solvent, and is usually heated at a temperature of 60 to 180 ° C. for 30 seconds to 30 minutes. By doing.
In addition, it is preferable that the surface of this hydrophobic film 11d is polarized in order to improve the adhesion with the hydrophilic film 11e. As a method for polarizing the surface of the hydrophobic film 11d, electric discharge machining can be used. Examples of the electric discharge machining include corona discharge machining, glow discharge machining, and ultraviolet irradiation (non-sustained discharge). Corona discharge machining is performed under conditions such as a frequency of 1-110 kHz, an output voltage of 1-60 kV, and a line speed of 0.1-200 m / min. The glow discharge machining is performed, for example, in an inert gas atmosphere such as argon under the conditions of a pressure of 1 Torr and a voltage of 130 to 170V. Moreover, ultraviolet irradiation is performed by irradiating the surface of a hydrophobic polymer membrane | film | coat with a 100-400 nm wavelength ultraviolet-ray, for example. Note that the time required for such electric discharge machining varies depending on the type of electric discharge machining.

(2) Hydrophilic film The hydrophilic film 11e is, for example, a polysaccharide-based natural polymer, a water-soluble protein-based natural polymer, an anionic, nonionic or cationic addition-polymerized water-soluble polymer, or a modified resin thereof. It is a coating film of hydrophilic polymer like. Here, examples of the polysaccharide-based natural polymer include soluble starch, carboxymethyl cellulose, hydroxyethyl cellulose, guar gum, tragacanth gum, xanthan gum, and sodium alginate. Examples of water-soluble protein-based natural polymers include gelatin. Anionic or nonionic addition polymerization water-soluble polymers include polyacrylic acid, sodium polyacrylate, polyacrylamide, partial hydrolysates thereof, polyvinyl alcohol, polyhydroxyethyl acrylate, polyvinyl pyrrolidone, acrylic acid copolymer. Examples thereof include copolymers, maleic acid copolymers, and salts of these alkali metals, organic amines, and ammonium. In addition, a modified water-soluble synthetic polymer obtained by carboxymethylation or sulfonation of an addition-polymerized water-soluble synthetic polymer can be used. Examples of the cationic addition polymerization water-soluble synthetic polymer include polyethylamino (meth) acrylates such as polyethyleneimine, Mannich modified compound of polyacrylamide, diacryldimethylaluminum chloride, polyvinylimidazoline, and dimethylaminoethyl acrylate polymer. Etc. Polycondensation water-soluble synthetic polymers include polyalkylene polyols such as polyoxyethylene glycol and polyoxyethyleneoxypropylene glycol, polycondensates of polyamines such as ethylenediamine or hexamethyldiamine and epichlorohydrin, and water-soluble polyethers. And water-soluble polyurethane resin obtained by polycondensation of polyisocyanate and polyisocyanate, polyhydroxymethylurea resin, and polyhydroxymethylmelamine resin. Among these hydrophilic polymers, anionic addition polymerization water-soluble polymers having a carboxylic acid or a carboxylic acid group are preferred, and in particular, polyacrylic acid, acrylic acid copolymers and alkali metal salts thereof, and polyacrylamide Is preferred. Here, the acrylic acid copolymer includes a copolymer of acrylic acid and vinyl acetate, acrylic acid or maleic acid, methacrylic acid, methyl methacrylate, ethyl methacrylate, hydroxyethyl methacrylate, itaconic acid, A copolymer with vinyl sulfonic acid and acrylamide is preferred. It is also possible to adopt a hydrophilic modified polymer obtained by modifying the above hydrophilic polymer with a low molecular weight organic compound having a carbonyl group (> C = 0) in the molecule, specifically, aldehydes, esters and amides. It is.

Thus, as a method of forming the hydrophilic film 11e on the fin 11a, a method of preparing a hydrophilic polymer solution and applying the solution onto the hydrophobic film 11d by spraying or brushing, A method (dip coating method) of pulling up after immersing the fin 11a provided with the hydrophobic film 11d in the solution can be considered. The solvent required for preparing the hydrophilic polymer solution is water. The concentration of the hydrophilic polymer solution is preferably adjusted so that the thickness of the hydrophilic film formed during drying is 10 μm or less, preferably 0.3 to 3 μm.
The hydrophilic polymer solution applied on the hydrophobic film 11d is dried by heating at a temperature of 100 to 200 ° C., preferably 150 to 180 ° C., for 30 seconds to 30 minutes.

[Operation of air conditioner]
Next, operation | movement of the air conditioning apparatus 1 is demonstrated using FIG.2 and FIG.9.
(1) Operation of Refrigerant Circuit First, the cooling operation will be described. During the cooling operation, the four-way switching valve 22 is in the state indicated by the solid line in FIG. 9, that is, the discharge side of the compressor 21 is connected to the gas side of the outdoor heat exchanger 24, and the suction side of the compressor 21 is the outdoor heat. It is in a state connected to the gas side of the exchanger 24. Moreover, the liquid closing valve 27, the gas closing valve 28, and the electric expansion valve 25 are open.

  When the outdoor fan 29 of the outdoor refrigerant unit 4, the compressor 21, and the indoor fan 12 of the indoor unit 2 are activated in this refrigerant circuit state, the gas refrigerant is sucked into the compressor 21 and compressed, and then switched to four-way switching. It is sent to the outdoor heat exchanger 24 via the valve 22, and the outdoor air is heated and condensed. Here, the outdoor air is taken into the outdoor refrigerant unit 4 from the back and side surfaces of the outdoor refrigerant unit 4 by driving the outdoor fan 29 (see the white arrow F1 in FIG. 2), and crosses the outdoor heat exchanger 24. Thereafter, the refrigerant is discharged from the front surface of the outdoor refrigerant unit 4 (see the white arrow F2 in FIG. 2). The condensed liquid refrigerant is decompressed by the electric expansion valve 25 and then sent to the indoor unit 2 via the liquid side communication pipe 32. Then, the liquid refrigerant sent to the indoor unit 2 is evaporated by cooling the indoor air in the indoor heat exchanger 11. Here, the indoor air is taken into the indoor unit 2 by driving the indoor fan 12 (see the white arrow F3 in FIG. 2), crosses the air cleaning unit 70 and the indoor heat exchanger 11, and then the indoor unit 2 (See the white arrow F4 in FIG. 2). The evaporated gas refrigerant is again sucked into the compressor 21 via the gas side communication pipe 31, the four-way switching valve 22 and the accumulator 23. In this way, the cooling operation is performed.

Next, the heating operation will be described. During the heating operation, the four-way switching valve 22 is in the state indicated by the broken line in FIG. 9, that is, the discharge side of the compressor 21 is connected to the gas side of the outdoor heat exchanger 24, and the suction side of the compressor 21 is the outdoor heat. It is in a state connected to the gas side of the exchanger 24. Further, the liquid closing valve 27 and the gas closing valve 28 are in an open state.
When the outdoor fan 29 of the outdoor refrigerant unit 4, the compressor 21, and the indoor fan 12 of the indoor unit 2 are activated in this refrigerant circuit state, the gas refrigerant is sucked into the compressor 21 and compressed, and then the four-way It is sent to the indoor unit 2 via the switching valve 22 and the gas side communication pipe 31. The gas refrigerant sent to the indoor unit 2 is condensed by heating the indoor air in the indoor heat exchanger 11. The condensed liquid refrigerant is sent to the outdoor refrigerant unit 4 via the liquid side communication pipe 32. The liquid refrigerant sent to the outdoor refrigerant unit 4 is depressurized by the electric expansion valve 25, and is then evaporated by cooling the outdoor air by the outdoor heat exchanger 24. The evaporated gas refrigerant is again sucked into the compressor 21 via the four-way switching valve 22 and the accumulator 23. In this way, the heating operation is performed. In addition, since the flow of outdoor air and room air is the same as that at the time of cooling operation, description is abbreviate | omitted.

(2) Humidification unit operation (humidification operation)
Hereinafter, the operation of the humidification unit 5 when performing the humidification operation will be described.
The humidifying unit 5 takes the outdoor air from the outside into the humidifying unit casing through the humidifying unit air inlet channel 60 by rotating the adsorption fan 56 (see the white arrow F5 in FIG. 2). The air that has entered the humidifying unit casing passes through approximately half part 51 a of the moisture absorption rotor 51, and passes through the adsorption fan 56 and the dehumidified air discharge flow path 59. To be supplied. At this time, the air taken into the humidifying unit casing from the outside becomes dehumidified air in which moisture contained in the air is adsorbed and removed when passing through a substantially half portion 51 a of the moisture absorption rotor 51. Thus, the dehumidified air is supplied to the primary space S1 of the oxygen-enriched membrane module 61 (see the solid line arrow F8 in FIG. 2).

  The substantially half portion 51a of the moisture absorption rotor 51 that has adsorbed moisture in this adsorption process becomes the substantially half portion 51b on the side of the moisture absorption rotor 51 on which moisture is not adsorbed by the half rotation of the moisture absorption rotor 51. That is, the adsorbed moisture moves to a position corresponding to the heater assembly 53 and the humidifying fan 54 as the moisture absorption rotor 51 rotates. The moisture that has moved here is desorbed into the air flow generated by the humidifying fan 54 by the heat from the heater assembly 53.

  When the humidifying fan 54 is driven to rotate, air is taken into the humidifying unit casing from the outside through the humidifying unit air inlet passage 60 (see the white arrow F5 in FIG. 2), and the moisture is adsorbed by the moisture absorption rotor 51. It passes through approximately half part 51 b and reaches humidification fan 54. The humidifying fan 54 sends the air that has passed through the hygroscopic rotor 51 to the indoor unit 2 via the humidified air supply channel 58 and the air supply pipe 8 (see solid line arrows F6 and F7 in FIG. 2). The air sent out to the indoor unit 2 is humidified air containing moisture adsorbed by the hygroscopic rotor 51. In this way, the humidified air supplied from the humidifying unit 5 to the indoor unit 2 is blown out into the room.

(3) Humidification unit operation (heating operation)
Hereinafter, the operation of the humidifying unit 5 when performing the heating operation will be described.
When performing the heating operation, the humidification unit 5 operates only the heater assembly 53 and the humidification fan 54 without rotating the moisture absorption rotor 51. Specifically, the external air passes through the moisture-absorbing rotor 51 without being adsorbed without passing through the adsorption process, and the moisture is removed after the humidification operation is finished. This is performed by passing air from the outside through the hygroscopic rotor 51 and heating it. The heated air obtained by such a heating operation is sent to the indoor unit 2 through the humidified air supply channel 58 and the air supply pipe 8 by the humidifying fan 54 as in the humidifying operation (the white arrow in FIG. 2). F5, see solid arrows F6 and F7).

(4) Operation of Oxygen Enriching Unit Hereinafter, the operation of the oxygen enriching unit 6 when performing the oxygen enriching operation will be described. The oxygen enrichment operation is performed in conjunction with the humidification operation or the heating operation of the humidification unit 5. For this reason, in the following description, it is assumed that humidified air or heated air is being sent to the indoor unit 2 via the humidified air supply channel 58 and the air supply pipe 8 by the humidifying fan 54.

  In the oxygen enrichment unit 6, the dehumidified air supplied by the adsorption fan 56 is flowing in the primary space S <b> 1 of the oxygen enriched membrane module 61 through the dehumidified air discharge passage 59 (solid arrow in FIG. 2). When the vacuum pump 65 is driven by F8 and the white arrow F11), the air introduced into the oxygen-enriched membrane module 61 passes through the oxygen-enriched membrane 63 and becomes oxygen-enriched air. Then, the oxygen-enriched air is discharged by the vacuum pump 65 into the humidifying fan etc. arrangement space SP (see solid line arrow F10 in FIG. 2) and mixed with the heated air or humidified air flowing through the humidifying fan etc. arrangement space SP. It is sent to the air supply pipe 8 by the humidifying fan 54 and supplied to the indoor unit 2 (see solid line arrow F7 in FIG. 2). Here, when the condensed water is generated from the oxygen-enriched air, the condensed water is stored in the drain pan 91, evaporated and dried by the air flow generated by the air suction of the humidifying fan 54, and supplied with the heated air or the humidified air. It is sent to the trachea 8 and supplied to the indoor unit 2 (see solid line arrow F7 in FIG. 2).

(5) Operation of indoor unit and air cleaning action When the indoor fan 12 is driven by the indoor fan motor 13, the indoor air is sucked from the front surface of the indoor unit 2 (see the white arrow F3 in FIG. 2). The sucked air first passes through the prefilter 75. At this time, the pre-filter 75 captures relatively large dust floating in the air. The air that has passed through the prefilter 75 then passes through the discharger 71. At this time, in the discharger 71, relatively small dust that has passed through the prefilter 75, viruses and bacteria attached to the dust, odor molecules floating in the air, and the like are generated by the ionization line 711 and the counter electrode 712. It is positively charged by the discharged electric field. Then, some of these fine particles, odor molecules, and the like are then decomposed, killed, or inactivated by active species generated in the discharge field generated by the streamer discharge electrode 713 and the counter electrode 712. The air that has passed through the discharger 71 passes through the electrostatic filter 720 of the primary filter 72. In the electrostatic filter 720, a part of the fine particles or odor molecules charged positively in the discharger 71 is electrostatically adsorbed. Then, some of the fine particles and odor molecules electrostatically adsorbed on the electrostatic filter 720 are decomposed, killed, or inactivated by the active species carried on the air flow. The air that has passed through the electrostatic filter 720 passes through the titanium apatite-carrying filter 721. In the titanium apatite-carrying filter 721, fine particles or odor molecules that have passed through the electrostatic filter 720 are mainly adsorbed to the titanium apatite particles 725. These fine particles, odor molecules, and the like are strongly decomposed, killed, or inactivated by the active species carried on the air stream and by the titanium apatite particles 725 activated by the active species. The air that has passed through the titanium apatite-carrying filter 721 passes through the secondary filter 73. In the secondary filter 73, viruses, fungi, and the like that have passed through the titanium apatite-carrying filter 721 are captured. The virus, bacteria, and the like are strongly decomposed, killed, or inactivated by the active species carried on the air stream and by titanium dioxide activated by the active species. The air that has passed through the secondary filter 73 is heat-exchanged by the indoor heat exchanger 11 and then blown into the room by the indoor fan 12 (see the white arrow F4 in FIG. 2).

[Characteristics of air conditioner]
In the air conditioner 1 according to the first embodiment, the fins 11a are covered with the hydrophobic film 11d. For this reason, in this air conditioning apparatus 1, the corrosion of the fin 11a can be suppressed effectively.
[Modification]
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

(A)
In the first embodiment, the oxygen-enriched air is supplied to the indoor unit 2 together with the humidified air or the heated air. However, a control valve is provided in the humidifier unit air inlet channel 60 extending from the hygroscopic rotor 51 to the humidifier fan arrangement space SP. It is also possible to selectively supply oxygen-enriched air and humidified air or heated air.

(B)
Instead of the air conditioner 1 according to the first embodiment, an air conditioner 101 as shown in FIG. 12 may be adopted. This air conditioner 101 has the same configuration as the air conditioner 1 of the previous embodiment except for the humidifying unit 105 of the optional unit 150. Further, the humidifying unit 105 is the same as the humidifying unit 5 of the previous embodiment except that the first flow path switching damper 95a, the second flow path switching damper 95b, and the indoor air discharge path 97 communicating with the outdoors are provided. It has a configuration. Therefore, here, the humidification unit 105 will be described focusing on the functions and the like of these components.

The first flow path switching damper 95a and the second flow path switching damper 95b are disposed in the air supply fan installation space SP. These flow path switching dampers 95a and 95b are controlled in conjunction with each other, and can switch the humidifying unit 105 between the first state and the second state. In the first state, the humidifying unit air inlet channel 60 is connected to the suction port of the humidifying fan 54 by the first channel switching damper 95a, and the air supply pipe 8 is blown from the humidifying fan 54 by the second channel switching damper 95b. Connected to the exit. As a result, in the first state, the oxygen enrichment operation described in the column of (4) Operation of the oxygen enrichment unit in the above embodiment is performed (see the solid line arrow in FIG. 12). On the other hand, in the second state, the air supply pipe 8 is connected to the suction port of the humidifying fan 54 by the first flow path switching damper 95a, and the indoor air discharge path 97 is blown by the humidifying fan 54 by the second flow path switching damper 95b. Connected to the exit. As a result, in the second state, the indoor air is discharged to the outdoors by the humidifying fan 54 via the air supply pipe 8 (see the broken line arrow in FIG. 12). Therefore, the air conditioner 101 can perform not only indoor oxygen enrichment but also indoor exhaust ventilation.
The flow path switching dampers 95a and 95b may be integrated by, for example, rotating.

(C)
In 1st Embodiment, although the flat fin was employ | adopted as a fin of the indoor heat exchanger 11, fins other than a flat fin, for example, a slit fin, a louver fin, etc., may be employ | adopted. In such a case, after forming various films on the aluminum plate or the aluminum alloy plate, the aluminum plate is pressed to obtain a fin having a predetermined shape. Here, examples of the press processing include overhang processing, drawing processing, punching processing, curling processing, ironing processing, and shearing processing.

(D)
In the indoor unit 2 according to the first embodiment, the primary filter 72 is disposed on the downstream side in the air flow direction of the discharger 71. However, the primary filter 72 includes the counter electrode 712 and the streamer discharge electrode 713 as shown in FIG. You may arrange | position between. Further, the primary filter 72 may be disposed so as to be in close contact with the counter electrode 712.

(E)
In the indoor unit 2 according to the first embodiment, the titanium apatite particles 725 are supported on the PP fibers 722. However, after the titanium apatite particles are made into a paste, they are applied and coated on any surface of the filter. It may be.
(F)
In the indoor unit 2 according to the first embodiment, only the titanium apatite particles 725 are supported on the PP fibers 722, but a conventional photo-semiconductor catalyst may be further supported. Here, the "conventional optical semiconductor catalyst" referred to in, for example, titanium dioxide, strontium titanate, zinc oxide, tungsten oxide, and a metal oxide typified iron oxide, typified by the fullerene such as C ₆₀ Carbon-based photo-semiconductor catalysts, nitrides composed of transition metals, oxynitrides, and the like.

(G)
In the indoor unit 2 according to the first embodiment, the primary filter 72 is disposed on the downstream side in the air flow direction of the discharger 71. Instead of this, a titanium apatite layer is formed on the surface of the counter electrode 712 facing the streamer discharge electrode 713. May be provided. Some active species have a very short lifetime, and the active species with higher activity tend to have a higher tendency. Therefore, if the air purification unit 70 is configured as described above, it is possible to supply highly active active species to titanium apatite at a high concentration. Accordingly, it is possible to further increase the rate of decomposing, killing, or inactivating odor molecules, bacteria, and viruses.

(H)
In the indoor unit 2 according to the first embodiment, active species are generated using streamer discharge, but active species may be generated using glow discharge, barrier discharge, or the like. When glow discharge is used, a titanium apatite layer may be provided on the discharge electrode. When barrier discharge is used, a titanium apatite layer may be provided on the insulating material in the discharge field region. FIG. 14A shows a state of barrier discharge, and FIG. 14B shows a state of glow discharge.

(I)
In the indoor unit 2 according to the first embodiment, the titanium apatite particles 725 are supported on the PP fibers 722, but the apatite may be supported on the PP fibers. The “apatite” here is, for example, hydroxyapatite, fluoroapatite, chloroapatite, tricalcium phosphate, calcium hydrogen phosphate, and the like.

Second Embodiment
As shown in FIG. 15, the air conditioning system 100 according to the second embodiment of the present invention mainly includes an air conditioner 110 and a total heat exchange unit 151. Hereinafter, each of these components will be described in detail.
(1) Air conditioner The air conditioner 110 is a so-called multi-type air conditioner, and mainly includes one (or more) outdoor units (not shown), an outdoor unit, and a refrigerant. It comprises a plurality of indoor units 120 connected via piping (not shown) and communication lines (not shown).

  As shown in FIG. 16, the indoor unit 120 is a ceiling-buried type indoor unit, and includes a main body 122 and an air purifying unit 123 that are buried in the ceiling at the time of installation, and a decorative panel 124 that is exposed to the indoor side at the time of installation. Composed. The air cleaning unit 123 can be attached to and detached from the main body 122 and the decorative panel 124 by means of an attachment 125, screws, or the like shown in FIG. Incidentally, when the air cleaning unit 123 is removed, the indoor unit 120 becomes a normal indoor unit 121 having no air cleaning function as shown in FIG.

As shown in FIGS. 19 and 20, the main body 122 includes a main body casing 130, a centrifugal fan 131, a heat exchanger 132, a drain pan 133, and a bell mouth 134.
As shown in FIG. 19, the main body casing 130 is a box having an open bottom surface, and includes a top plate 130A and a side plate 130B extending downward from the peripheral edge of the top plate 130A. The main body casing 130 accommodates the components of the indoor unit 120 therein. Further, as shown in FIGS. 15, 18, and 19, the side plate 130 </ b> B is provided with two pipe attachment ports 135. The two pipe attachment ports 135 have a first air supply pipe 148 and a first exhaust pipe. A tube 149 is attached. The other ends of the first air supply pipe 148 and the first exhaust pipe 149 are connected to the total heat exchange unit 151. In addition, outdoor air sucked into an air supply fan (not shown) of the total heat exchange unit 151 passes through the first air supply pipe 148. Further, a part of the indoor air sucked into the indoor unit 120 passes through the first exhaust pipe 149.

  In the present embodiment, the centrifugal blower 131 is a turbo fan, and includes a fan motor 131A provided at the center of the top plate 130A of the main body casing 130, and an impeller 131B that is connected to the fan motor 131A and is driven to rotate. is doing. Centrifugal blower 131 can suck indoor air into impeller 131B and blow it out to the outer peripheral side of impeller 131B (see solid arrows F101 and F102 in FIG. 19).

  In this embodiment, the heat exchanger 132 is a cross fin tube type heat exchanger panel formed by being bent so as to surround the outer periphery of the centrifugal blower 131 (see FIG. 20), and is installed outdoors. It is connected to the unit through refrigerant piping. The heat exchanger 132 can function as a refrigerant evaporator flowing inside during the cooling operation, and as a refrigerant condenser flowing inside during the heating operation. Thus, the heat exchanger 132 cools the indoor air sucked into the main body casing 130 through the bell mouth 134 and blown to the outer peripheral side of the impeller 131B of the centrifugal blower 131 during the cooling operation and is heated during the heating operation. Can do.

The drain pan 133 is disposed below the heat exchanger 132 and receives drain water generated by condensation of moisture in the room air when the room air is cooled in the heat exchanger 132.
The air cleaning unit 123 includes a discharger 310, a primary filter 320, and a secondary filter 330. These element parts are stored in the unit casing 340.

  As shown in FIG. 19, the discharger 310 mainly includes a counter electrode 312, an ionization line 311, and a streamer discharge electrode 313. As shown in FIG. 21, the counter electrode 312 is a metal plate having a square-wave cross section, and includes an actual electrode portion 312a that substantially functions as an electrode and a plurality of slit portions 312b. The slit portion 312b plays a role of flowing air sucked from an inlet 126 (described later) of the decorative panel 124 to the main body 122 side. The ionization line 311 is arrange | positioned at the decorative panel 124 side of the counter electrode 312 as FIG. 19 shows. In addition, the ionization line 311 is arrange | positioned 1 each between the real electrode parts 312a. Further, the ionization line 311 is formed of a fine diameter tungsten wire or the like and used as a discharge electrode. As shown in FIG. 22, the streamer discharge electrode 313 includes an electrode bar 313a and a needle electrode 313b. The needle electrode 313b is fixed so as to be substantially orthogonal to the electrode bar 313a. As shown in FIG. 19, the streamer discharge electrode 313 is disposed on the main body 122 side of the counter electrode 312 so that the needle electrode 313 b faces the actual electrode portion 312 a of the counter electrode 312.

  Of these electrodes 311, 312, and 313, the counter electrode 312 and the ionization line 311 are relatively small floating in the air that has passed through the prefilter 140 (see FIG. 19) provided on the decorative panel 124. Plays the role of charging dust. Specifically, when a high voltage is applied between the ionization line 311 and the actual electrode portion 312a to generate a discharge between the electrodes 311 and 312, dust or the like passing between the electrodes 311 and 312 is positively charged. Is charged. The charged dust is supplied rearward through the slit portion 312b and is electrostatically adsorbed by an electrostatic filter 322 described later. At this time, since viruses and bacteria contained in the dust are charged, the efficiency of adsorbing the viruses and bacteria to titanium apatite described later is increased.

  On the other hand, the counter electrode 312 and the streamer discharge electrode 313 play a role of generating active species to be supplied to a titanium apatite-carrying filter 321 described later. Specifically, when a DC, AC, or pulse discharge voltage is applied between the streamer discharge electrode 313 and the counter electrode 312, a streamer discharge as shown in FIG. 23 occurs between the electrodes 312 and 313. When streamer discharge occurs, low-temperature plasma is generated in the discharge field. This low-temperature plasma generates radical species such as fast electrons, ions, ozone, and hydroxy radicals, and other excited molecules (excited oxygen molecules, excited nitrogen molecules, excited water molecules). These active species are supplied to the titanium apatite-carrying filter 321 along with the air flow. These active species have a very high energy level, and even before reaching the titanium apatite-carrying filter 321, they decompose and decompose small organic molecules such as ammonia, aldehydes, and nitrogen oxides contained in the air. Has the ability to deodorize.

  A part of a sectional view of the primary filter 320 is shown in FIG. The primary filter 320 is formed by bonding an electrostatic filter 322 and a titanium apatite-carrying filter 321 together. The primary filter 320 is disposed such that the electrostatic filter 322 faces the decorative panel 124 side and the titanium apatite-carrying filter 321 faces the main body 122 side. The electrostatic filter 322 adsorbs dust or the like charged by the discharger 310. As shown in FIG. 25, the titanium apatite-carrying filter 321 is made of polypropylene fiber (hereinafter referred to as PP fiber) 326 carrying titanium apatite particles 325, and adsorbs dust or the like passing through the electrostatic filter 322. To do. 25. As shown in FIG. 25, the PP fiber 326 includes a core 323 made of polypropylene and a coating layer 324 made of polypropylene, and is supported on the coating layer 324 so that the titanium apatite particles 325 are exposed to the air side. Has been. Titanium apatite is apatite in which some calcium ions of calcium hydroxyapatite are replaced with titanium ions by a technique such as ion exchange. This titanium apatite has the property of specifically adsorbing viruses, molds, bacteria, etc. contained in dust and the like. The titanium apatite has its photocatalytic function activated by the active species supplied from the discharger 310, and decomposes, kills, or inactivates viruses, molds, bacteria, and the like.

The secondary filter 330 carries anatase type titanium dioxide. The secondary filter 330 adsorbs airborne viruses and bacteria that have not been adsorbed to the primary filter 330. In the secondary filter 330, the adsorbed bacteria and viruses are killed or inactivated by titanium dioxide activated by the active species.
As shown in FIGS. 16 and 19, the decorative panel 124 is a substantially quadrangular plate-like body, and mainly sucks room air in the approximate center thereof into the main body casing 130 of the main body 122 through the air cleaning unit 123. And a plurality of (four in this embodiment) outlets 127 that blow out conditioned air from the main body casing 130 toward the indoor space through the air cleaning unit 123. The suction port 126 is provided with a suction grill 128 and a prefilter 140 for removing relatively large dust in the indoor air sucked from the suction port 126. The blower outlet 127 is provided with a louver 129 for adjusting the wind direction.

Hereinafter, the operation of the indoor unit 120 and the air cleaning action will be described.
When the impeller 131B is rotated by the fan motor 131A, the air in the room RM is sucked into the inlet 126 of the indoor unit 120 as indicated by the arrow F101 in FIGS. The sucked air first passes through the prefilter 140. At this time, the pre-filter 140 captures relatively large dust floating in the air. The air that has passed through the prefilter 140 then passes through the discharger 310. At this time, in the discharger 310, relatively small dust that has passed through the pre-filter 140, viruses and bacteria attached to the dust, odor molecules floating in the air, and the like are generated by the ionization line 311 and the counter electrode 312. It is positively charged by the discharged electric field. Then, some of these fine particles, odor molecules, and the like are then decomposed, killed, or inactivated by active species generated in the discharge field generated by the streamer discharge electrode 313 and the counter electrode 312. The air that has passed through the discharger 310 passes through the electrostatic filter 322 of the primary filter 320. In the electrostatic filter 322, a part of fine particles or odor molecules charged positively in the discharger 310 is electrostatically adsorbed. Then, some of the fine particles and odor molecules electrostatically adsorbed on the electrostatic filter 322 are decomposed, killed, or inactivated by the active species carried on the air flow. The air that has passed through the electrostatic filter 322 passes through the titanium apatite-carrying filter 321. In the titanium apatite-carrying filter 321, fine particles or odor molecules that have passed through the electrostatic filter 322 are mainly adsorbed to the titanium apatite particles 325. These fine particles, odorous molecules, and the like are strongly decomposed, killed, or inactivated by the active species carried on the air stream and by the titanium apatite particles 325 activated by the active species. The air that has passed through the titanium apatite-carrying filter 321 passes through the secondary filter 330. In the secondary filter 330, viruses, fungi, and the like that have passed through the titanium apatite-carrying filter 321 are captured. The virus, bacteria, and the like are strongly decomposed, killed, or inactivated by the active species carried on the air stream and by titanium dioxide activated by the active species. And the air which passed the secondary filter 330 is suck | inhaled by the bell mouth 134 of the main body 122, Then, it blows off to the outer peripheral side of the centrifugal blower 131 (refer the solid line arrow F102 of FIG. 19). The air blown to the outer peripheral side of the centrifugal blower 131 is heat-exchanged by the heat exchanger 132 arranged on the outer peripheral side of the centrifugal blower 131, and then blown from the blower outlet 127 to the room RM through the ventilation port of the air cleaning unit 123. (See solid arrow F103 in FIG. 19).

(2) Total heat exchange unit The total heat exchange unit 151 includes a heat exchange element (not shown), an air supply fan (not shown), an exhaust fan (not shown), a damper (not shown), and the like. The air supply passage (not shown) and the exhaust passage (not shown) are formed. The total heat exchange unit 151 includes an indoor air supply pipe port (not shown), an indoor exhaust pipe port (not shown), an outdoor air supply pipe port (not shown), and an outdoor exhaust pipe port ( (Not shown), a first air supply pipe 148 is provided in the indoor air supply pipe port, a first exhaust pipe 149 is provided in the indoor exhaust pipe port, and a second air supply pipe 153 is provided in the outdoor air supply pipe port. However, the second exhaust pipe 154 is attached to the outdoor exhaust pipe port. The other end of the second air supply pipe 153 and the second exhaust pipe 154 is provided through the wall W, and communicates with the outer space.

Hereinafter, the operation of the total heat exchange unit 151 will be described.
When the total heat exchange unit 151 is turned on, the air supply fan and the exhaust fan start to operate. When the air supply fan starts operation, the air supply fan draws outdoor air from the outside space through the second air supply pipe 153 as supply air into the casing (see the solid arrow F104 in FIG. 15). Then, the supply air is sent to the first supply pipe 148 through the supply passage (see the solid line arrow F106 in FIG. 15), and finally blown out into the room RM together with the room air from the outlet 127 of the room unit 120. . At this time, the supply air passes through the heat exchange element.

On the other hand, when the exhaust fan begins to operate, the exhaust fan sucks a part of the indoor air flowing into the indoor unit 120 through the first exhaust pipe 149 into the casing as exhaust (see solid arrow F107 in FIG. 15). Then, the exhaust gas is sent to the second exhaust pipe 154 through the exhaust passage (see the solid arrow F105 in FIG. 15), and finally exhausted to the outer space. At this time, since the exhaust gas passes through the heat exchange element, it simultaneously exchanges heat with the supply air that passes through the heat exchange element.
In this way, the total heat exchange unit 151 efficiently recovers cold in the summer and warm in the winter. In the total heat exchange unit 151, the damper is switched in the intermediate period, and the exhaust gas is discharged into the outer space without passing through the heat exchange element.

[Anti-corrosion treatment for indoor heat exchangers]
The fins of the heat exchanger 132 according to the second embodiment have the same structure as the fins of the indoor heat exchanger 11 according to the first embodiment.

[Features of indoor unit]
In the indoor unit 120 according to the second embodiment, the fin 11a is covered with the hydrophobic film 11d. For this reason, in this indoor unit 120, the corrosion of the fin 11a can be suppressed effectively.
[Modification]
In the second embodiment, the ceiling-buried type indoor unit 120 is employed, but instead, a ceiling-suspended indoor unit 120 may be employed.

  The air conditioner according to the present invention has a feature that the heat exchanger has excellent corrosion resistance, and is equipped with an air conditioner that takes in outside air, humidified air, oxygen-enriched air, and the like, and a discharge unit. It is useful as an air conditioner.

1 is an external view of an air conditioner according to a first embodiment of the present invention. It is a figure which shows arrangement | positioning of each apparatus in the indoor unit of the air conditioning apparatus which concerns on 1st Embodiment of this invention, and an outdoor unit. Side surface sectional drawing of the air purifying unit which concerns on 1st Embodiment of this invention. The perspective view which shows the structure of the air flow direction upstream of the discharge part which concerns on 1st Embodiment of this invention. The perspective view which shows the shape of the streamer discharge electrode which concerns on 1st Embodiment of this invention. The figure showing the mode of the streamer discharge which concerns on 1st Embodiment of this invention. The side sectional view of the primary filter concerning a 1st embodiment of the present invention. Detailed drawing of the fiber which comprises the primary filter which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the refrigerant circuit of the air conditioning apparatus by which 1st Embodiment of this invention was employ | adopted, a humidification unit, and an oxygen enrichment unit. 1 is a schematic diagram of an oxygen-enriched membrane module according to a first embodiment of the present invention. It is a schematic diagram of the surface structure of the fin which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the refrigerant circuit of the air conditioning apparatus by which the modification (B) of 1st Embodiment of this invention was employ | adopted, a humidification unit, and an oxygen enrichment unit. The block diagram of the air purifying unit which concerns on the modification (D) of 1st Embodiment. (A) The figure showing the mode of the barrier discharge which concerns on the modification (H) of 1st Embodiment, (b) The figure showing the state of the glow discharge which concerns on the modification (H) of 1st Embodiment. It is a simple block diagram of the air conditioning system which concerns on 2nd Embodiment of this invention. It is an external appearance perspective view of the indoor unit which concerns on 2nd Embodiment of this invention. It is an external appearance perspective view at the time of removing an air purifying unit from the indoor unit which concerns on 2nd Embodiment of this invention. It is a one part external appearance perspective view of the air conditioning system which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the indoor unit which concerns on 2nd Embodiment of this invention. It is a cross-sectional view of the indoor unit according to the second embodiment of the present invention. It is a perspective view which shows the structure by the side of the decorative panel of the discharge part which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the shape of the streamer discharge electrode which concerns on 2nd Embodiment of this invention. It is a figure showing the mode of the streamer discharge which concerns on 2nd Embodiment of this invention. It is a sectional side view of the primary filter which concerns on 2nd Embodiment of this invention. It is detail drawing of the fiber which comprises the primary filter which concerns on 2nd Embodiment of this invention.

Explanation of symbols

1,101 Air conditioner 5 Humidification unit 6 Oxygen enrichment unit 8 Air supply pipe (outside air introduction pipe)
11,132 Indoor heat exchanger (heat exchanger)
11a Fin 11d Hydrophobic film 11e Hydrophilic film 71,310 Discharger (discharge unit)
120 Indoor unit (air conditioner)
148 First supply pipe (outside air introduction pipe)

Claims (4)

An outside air introduction pipe (8, 148) for introducing outside air into the room as supply air;
A heat exchanger (11, 132) disposed on the downstream side in the air supply flow direction and having a heat transfer tube and fins (11a) made of aluminum or aluminum alloy attached to the heat transfer tube;
A hydrophobic coating (11d) covering the fins;
A hydrophilic film (11e) formed on the hydrophobic film;
An air conditioner (1, 101, 120). An oxygen enrichment unit (6) that is provided on the upstream side of the outside air introduction pipe in the supply air flow direction and concentrates oxygen contained in the outside air;
The air conditioner (1, 101) according to claim 1. A humidifying unit (5) provided on the upstream side of the outside air introduction pipe in the supply air flow direction and increasing the humidity of the outside air;
The air conditioner (1, 101) according to claim 1 or 2. A discharge unit (71, 310) provided in the vicinity of the heat exchanger;
The air conditioner (1, 101, 120) according to any one of claims 1 to 3.

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