WO2014030539A1 - Air conditioner - Google Patents

Abstract

This air conditioner mounts an electrostatic atomization device at the interval from an air intake opening to an air outlet opening, and the electrostatic atomization device is provided with: a mist discharge unit that discharges mist; and a water supply unit that has self-water-absorptivity, absorbing moisture from air, and supplies absorbed water to the mist discharge unit.

Description

Air conditioner

Embodiments of the present invention relate to an air conditioner.

Conventionally, this type of air conditioner has been considered to have an air cleaning function that exhibits, for example, a deodorizing action and a sterilizing action from a hygienic viewpoint. In recent years, as disclosed in Patent Document 1, for example, a configuration has been considered in which an air cleaning function is realized by mist generated by an electrostatic atomizer.

This type of electrostatic atomizer generally uses a Peltier element as a supply source of water for discharge as mist. However, since this Peltier element is expensive, the cost becomes high. Further, in order to sufficiently exhibit the cooling effect by the Peltier element, a heat dissipating mechanism such as a heat dissipating fin is required, so that the entire apparatus becomes large and the installation space is limited.

Japanese Patent No. 4701746

This embodiment provides an air conditioner in which the electrostatic atomizer is reduced in cost and size.

The air conditioner of this embodiment mounts the electrostatic atomizer at any position between the air inlet and the air outlet. The electrostatic atomizer includes a mist discharge unit that discharges mist and a water supply unit that has self-water absorption to absorb moisture in the air and supplies the absorbed water to the mist discharge unit.

A longitudinal side view showing the internal structure of the indoor unit of an air conditioner according to the first embodiment The perspective view which decomposes | disassembles and shows an electrostatic atomizer Plan view of electrostatic atomizer Front view of electrostatic atomizer Bottom view of electrostatic atomizer Left side view of electrostatic atomizer Right side view of electrostatic atomizer Sectional drawing of the electrostatic atomizer along the AA line of FIG. Sectional view of the electrostatic atomizer along the line BB in FIG. Sectional view of the electrostatic atomizer and its surroundings The perspective view of the electrostatic atomizer which concerns on 2nd Embodiment. Cross section of electrostatic atomizer

(First embodiment)
Hereinafter, the air conditioner according to the first embodiment will be described. As shown in FIG. 1, the air conditioner includes an indoor unit 10 installed indoors, and an outdoor unit (not shown) installed outside and connected to the indoor unit 10 via a refrigerant pipe. ing.

The indoor unit 10 includes a heat exchanger 13 and a cross flow fan 14 in an indoor unit housing 11. In addition, an air suction port 15 for sucking indoor air into the indoor unit housing 11 is provided in the upper part of the indoor unit housing 11. An air outlet 16 is provided at the lower part of the indoor unit housing 11 to blow out the air sucked into the indoor unit housing 11 into the room. The indoor unit 10 sucks indoor air from the air suction port 15 by the blowing action of the cross flow fan 14, exchanges heat with the heat exchanger 13, and blows it out from the air outlet 16. A vertical louver 17, a rear horizontal louver 18, and a front horizontal louver 19 are provided in the air outlet 16 in the front-rear direction.

A plurality of the vertical louvers 17 are arranged along the left-right direction of the indoor unit 10, and are provided so as to be rotatable in the left-right direction. The vertical louver 17 functions as a wind direction plate that changes the direction of the air blown from the air outlet 16 to the left or right, that is, a left and right wind direction plate. The rear horizontal louver 18 and the front horizontal louver 19 are plate-like members extending in the left-right direction of the indoor unit 10, and are provided so as to be rotatable in the vertical direction. The rear horizontal louver 18 and the front horizontal louver 19 function as a wind direction plate that changes the direction of the air blown from the air outlet 16 up and down, that is, as a vertical wind direction plate.

The indoor unit 10 also includes a control device (not shown) that controls the overall operation of the indoor unit 10, and based on control by the control device, air conditioning operations such as cooling, heating, and dehumidification, and indoor air Various operations such as an air cleaning operation for performing sterilization and deodorization, and a cleaning operation for cleaning the interior of the indoor unit 10 can be performed.

The indoor unit 10 includes an electrostatic atomizer 21. In the present embodiment, the electrostatic atomizer 21 is installed in the vicinity of the front portion of the heat exchanger 13 inside the indoor unit housing 11. Next, the structure of this electrostatic atomizer 21 and its peripheral part is demonstrated. In addition, this electrostatic atomizer 21 is attached so that the back surface side faces the front surface of the heat exchanger 13.

As shown in FIG. 2, the electrostatic atomizer 21 includes a mist generator 22 and an electrode 23.
The mist generating unit 22 includes a discharge electrode member 24. In this case, the discharge electrode member 24 includes an internal mist discharge pin 24a and an external mist discharge pin 24b, and is attached to a pin case 31 made of, for example, a plastic material. These internal mist release pin 24a and external mist release pin 24b are formed of a felt material made of a porous material having water absorption and water retention, for example, fibrous polyester, etc. It has a cylindrical shape, but its tip has a rounded pin shape.

In this case, the tip portion of the internal mist discharge pin 24a made of one member constitutes a mist discharge portion, and the portion other than the tip portion of the internal mist discharge pin 24a constitutes a water supply portion. Moreover, the front-end | tip part of the external mist discharge | release pin 24b which consists of one member comprises a mist discharge | release part, and parts other than a front-end | tip part among the external mist discharge | release pins 24b comprise a water supply part. That is, each of the internal mist discharge pin 24a and the external mist discharge pin 24b is composed of the same member, and in the internal mist discharge pin 24a and the external mist discharge pin 24b, the mist discharge portion on the front end side. Are integrally provided at one end of the water supply portion on the base end side without any seam.

The internal mist discharge pin 24a and the external mist discharge pin 24b have a structure in which a porous material having water absorption and water retention is impregnated with a substance having self-water absorption that absorbs moisture in the air. . Thereby, the internal mist discharge pin 24a and the external mist discharge pin 24b exhibit self-water absorption that spontaneously absorbs moisture in the air when the humidity of the surrounding atmosphere exceeds a predetermined value. As such a self-water-absorbing substance, for example, a deliquescent substance that spontaneously absorbs and dissolves moisture in the air without requiring external energy. In this embodiment, as such a deliquescent substance, potassium polyphosphate, which is a phosphate-based polymer, is impregnated in the internal mist release pin 24a and the external mist release pin 24b. As a result, the internal mist discharge pin 24a and the external mist discharge pin 24b each include a mist discharge portion and a water supply portion, respectively, and have a self-water-absorbing property that absorbs moisture in the air.

The internal mist discharge pin 24a and the external mist discharge pin 24b impregnated with potassium polyphosphate as a deliquescent substance, that is, the discharge electrode member 24, for example, have an ambient air temperature of 5 ° C. and humidity exceeding 40%. Start water absorption from inside. In this case, by maintaining the ambient humidity at about 40 to 50%, the water absorption action of the discharge electrode member 24 is stably continued. Thus, the water absorption start condition of the discharge electrode member 24 can be controlled by adjusting the ambient temperature and humidity according to the characteristics of the substance impregnated in the discharge electrode member 24, and the discharge electrode member The water absorption action of 24 can be stabilized.

In addition, as the deliquescent material impregnated in the discharge electrode member 24, it is preferable to employ a material that is not easily atomized as much as possible. For example, a polymer having a molecular weight of 300 or more may be employed. This is because, for example, a low molecular weight deliquescent material such as sodium chloride is released by electrostatic atomization when a high voltage is applied to the discharge electrode member 24 when the material is deliquescent, and gradually contains the deliquescent material. This is because the amount decreases and the self-water absorption of the discharge electrode member 24 deteriorates. In this case, it is sufficient that at least one deliquescent material having a molecular weight of 300 or more is impregnated in the discharge electrode member 24, and the discharge electrode member further includes at least one deliquescent material having a molecular weight of 300 or more. 24 may be impregnated with two or more deliquescent substances having different molecular weights. Therefore, the discharge electrode member 24 may be impregnated with a deliquescent material having a molecular weight of 300 or more (for example, about 400) and a deliquescent material having a molecular weight of less than 300 (for example, about 200).

Even if the discharge electrode member 24 is impregnated only with the deliquescent material having a molecular weight of about 200, the deliquescent material is easily released from the discharge electrode member 24 by electrostatic atomization. However, even if a deliquescent substance having a molecular weight of about 200 is impregnated into the discharge electrode member 24 together with a deliquescent substance having a molecular weight of 300 or more, the low molecular weight deliquescent substance is eluted from the discharge electrode member 24. Can be suppressed. Further, it has been confirmed that the self-water absorption performance of the discharge electrode member 24 is improved by impregnating the discharge electrode member 24 with two or more types of deliquescent substances having different molecular weights.

Further, the discharge electrode member 24 does not need to be impregnated with a substance having self water absorption, and a part of the discharge electrode member 24 may be impregnated with a substance having self water absorption. That is, for example, the discharge electrode member 24 may have a configuration in which the mist discharge portion is not impregnated with a substance having self-water absorption, and a portion other than the mist discharge portion is impregnated with a substance having self-water absorption. Further, the discharge electrode member 24 may be configured such that the mist discharge portion on the distal end side and the water supply portion on the proximal end side are different members. In this case, the member constituting the mist discharging part may or may not be impregnated with a substance having self-water absorption, and the member constituting the water supply part is entirely made of a substance having self-water absorption. It may be impregnated, or a part thereof may be impregnated with a substance having self-water absorption.

The pin case 31 has a hole 31a for pin support at substantially the center thereof, and also has a support portion 31b for pin support, located on both ends of the hole 31a. ing. The internal mist discharge pin 24a and the external mist discharge pin 24b are supported by the pin case 31 by inserting the proximal end side into the hole 31a and sandwiching the distal end side between the support portions 31b. ing. As shown in FIG. 3, the base end portion of the internal mist discharge pin 24a supported by the pin case 31 and the base end portion of the external mist discharge pin 24b are outward from the back surface 31e of the pin case 31. Projecting from the back surface 31e of the pin case 31. In addition, an inner discharge hole 31 c that opens into the indoor unit housing 11 is formed in a portion of the pin case 31 on the tip end side where the internal mist discharge pin 24 a is attached.

The internal mist discharge pin 24a and the external mist discharge pin 24b that are supported by the pin case 31 and have the self-water absorption, that is, the discharge electrode member 24, moisture in the air spontaneously without requiring external energy. Absorbed. In this case, moisture in the air is easily absorbed in the portion of the discharge electrode member 24 that is exposed outward from the back surface 31e of the pin case 31. And the water | moisture content absorbed by the discharge electrode member 24 osmose | permeates the said discharge electrode member 24, and is supplied to the mist discharge | release part of a front-end | tip part. In this case, since the mist discharge portion is configured as a part of the discharge electrode member 24 having self water absorption, the mist discharge portion itself naturally has self water absorption. Therefore, the mist discharge unit includes moisture supplied from the water supply unit, in other words, moisture absorbed by the mist discharge unit itself, in addition to moisture that permeates from the water supply unit.

The electrode 23 is supported by an electrode support portion 31 d provided in the pin case 31. The electrode 23 is supported by the electrode support portion 31d of the pin case 31, and the base end portion thereof is connected to a high voltage power source (not shown). Further, the electrode 23 has two contact portions 23a at the tip thereof. Each of the contact portions 23a is formed in a U-shaped cross section having a pair of pieces extending in the vertical direction and facing the pin case 31, and is held by the pin case 31 as described above. The internal mist discharge pin 24a and the external mist discharge pin 24b are contacted from the front side. The contact portions 23a also have a function of holding the internal mist discharge pin 24a and the external mist discharge pin 24b from the front side.

A pin cover 32 made of, for example, a plastic material is attached to the front side of the pin case 31 that supports the internal mist discharge pin 24a, the external mist discharge pin 24b, and the electrode 23 as described above. An external discharge hole 32a that communicates with the duct 33 shown in FIGS. 1 and 10 is formed in a portion of the pin cover 32 on which the external mist discharge pin 24b is attached. The duct 33 is made of, for example, a plastic material, and extends from the external discharge hole 32a to the air outlet 16 of the indoor unit 10. In this case, the duct 33 includes a main body portion 33a extending in a pipe shape and a nozzle portion 33b attached to the distal end portion of the main body portion 33a. Further, as shown in FIGS. 3 to 5, an internal discharge hole 32b is formed in a portion of the pin cover 32 on the tip end portion side where the internal mist discharge pin 24a is attached. Therefore, in the electrostatic atomizer 21, the internal mist discharge pin 24a communicates with the interior of the indoor unit housing 11 via the internal discharge hole 31c and the internal discharge hole 32b, and the external mist discharge pin 24b is external. The air outlet 16 communicates with the air discharge hole 32 a and the duct 33.

Further, the front portion of the pin cover 32 has air inlets 32c and 32d at positions facing the internal mist discharge pin 24a and the external mist discharge pin 24b. A part of the air flowing in the outdoor unit main body 12 due to the action flows into the electrostatic atomizer 21 through the air inlets 32c and 32d, and is supplied to the internal mist discharge pin 24a and the external mist discharge pin 24b. It comes to contact. The air flowing toward the internal mist discharge pin 24a is supplied to the interior of the indoor unit housing 11 through the internal discharge hole 31c, while the air flowing toward the external mist discharge pin 24b is shown in FIG. As indicated by an arrow a, the air is supplied to the air outlet 16 through the external discharge hole 32a and the duct 33. In this case, the portion forming the path from the internal mist discharge pin 24a to the internal discharge hole 31c and the internal discharge hole 32b is configured as the internal mist supply path section 100 shown in FIGS. A portion that forms a path from the mist discharge pin 24b to the air outlet 16 through the external discharge hole 32a and the duct 33 is configured as an external mist supply path portion 200 shown in FIGS. .

As shown in FIGS. 6 to 9, a water guide portion 32 e that is inclined downward toward the back surface side of the electrostatic atomizer 21 is provided at the lower portion of the pin cover 32, and the discharge electrode member 24 has When water is excessively absorbed, as shown by an arrow b in FIG. 10, the water that overflows and drops from the discharge electrode member 24 flows out of the water guide portion 32e without difficulty. And the water which flows out from the water guide part 32e is guide | induced to the drain pan 41 provided in the downward direction of the said heat exchanger 13 in order to receive the drain water from the heat exchanger 13. As shown in FIG. That is, the discharge electrode member 24 is disposed above the drain pan 41 and further above the water guiding portion 32e. Here, “upward” does not mean just above. Therefore, if it is a position higher than the drain pan 41, the upper part of the drain pan 41 includes a position shifted from directly above the drain pan 41. If the upper part of the water guiding part 32e is a position higher than the water guiding part 32e, the water guiding part. The position shifted from directly above 32e is also included. Further, in this case, the inclination of the water guiding portion 32e is set to about 10 degrees with respect to the horizontal direction, but the inclination can be changed and set as appropriate. The pin cover 32 is provided with an electrode cover portion 32f that covers the electrode 23 described above.

The electrostatic atomizer 21 configured as described above applies a high voltage (for example, −6 kV) to the electrode 23 from a high voltage power source (not shown), and thereby the internal mist discharge pin 24a is passed through the electrode 23. A high voltage is applied to the external mist discharge pin 24b. As described above, the internal mist discharge pin 24a and the external mist discharge pin 24b contain water absorbed from the air. Therefore, when charges are concentrated on the tip portions of the internal mist discharge pin 24a and the external mist discharge pin 24b, energy exceeding the surface tension is given to the water contained in the tip portion. As a result, the water at the tip of the internal mist discharge pin 24a and the external mist discharge pin 24b is split (Rayleigh split), and water is supplied from the tip of the internal mist discharge pin 24a and the external mist discharge pin 24b. Atomized and released as a mist. That is, an electrostatic atomization phenomenon occurs.

Here, the water particles released in the form of mist are charged and contain hydroxy radicals generated by the energy. Accordingly, the hydroxy radical having a strong oxidizing action is released together with the mist from the internal mist release pin 24a and the external mist release pin 24b, and sterilization and deodorization are enabled by the action of the hydroxy radical. The mist containing the hydroxy radicals released from the internal mist discharge pin 24a and the external mist discharge pin 24b in this way together with the air flowing in the mist supply path 100 through the internal mist supply path 100 is an indoor unit. 10 is supplied to the outside of the indoor unit 10 from the air outlet 16 together with the air (see arrow a in FIG. 10) that flows through the mist supply path 200 through the external mist supply path 200. Is done.

The electrostatic atomizer 21 does not include the other electrode corresponding to the charged internal mist discharge pin 24a and external mist discharge pin 24b, that is, a counter electrode. In this case, in the indoor unit 10 in which the electrostatic atomizer 21 is installed, a member that is grounded via a ground wire or the like, for example, a metal housing of the indoor unit 10 is charged with an internal mist discharge pin. 24a and the other electrode corresponding to the external mist discharge pin 24b.

That is, the electrostatic atomizer 21 uses the internal mist discharge pin 24a and the external mist discharge pin 24a and the external mist discharge pin 24b which are charged by a high voltage from a high voltage power supply. The structure is not provided in the vicinity of the discharge pin 24b. Therefore, the discharge itself from the internal mist discharge pin 24a and the external mist discharge pin 24b becomes very gentle, and no corona discharge occurs. Therefore, for example, ozone or the ozone oxidizes nitrogen in the air. The generation of harmful gases such as nitrogen oxides, nitrous acid, and nitric acid generated by this is suppressed. The electrostatic atomizer 21 may be configured to have a counter electrode for the distal end portion of the discharge electrode member 24, that is, a mist emitting portion, in the vicinity of the discharge electrode member 24. Further, the electrostatic atomizer 21 may have a configuration in which platinum is supported on the discharge electrode member 24.

In the indoor unit 10 configured as described above, a control device (not shown) drives the electrostatic atomizer 21 when the indoor unit 10 is in the air cleaning operation. That is, a high voltage is applied to the electrode 23 of the electrostatic atomizer 21, and mist containing hydroxy radicals is generated from the internal mist discharge pin 24a and the external mist discharge pin 24b. Therefore, when the indoor unit 10 is in the air cleaning operation, the electrostatic atomizer 21 supplies the generated mist to the inside of the indoor unit 10 through the internal mist supply path unit 100, and for the external unit. Is supplied to the air outlet 16 of the indoor unit 10 through the mist supply path part 200 of the indoor unit 10. Thereby, generation | occurrence | production of bacteria and generation | occurrence | production of an odor can be suppressed inside and outside the indoor unit 10 by performing an air cleaning operation.

Moreover, since the electrostatic atomizer 21 uses water absorbed from the air as water to be discharged as mist, it is necessary to include a Peltier element as a supply source of water supplied to the mist discharge unit. In addition, since such a Peltier element is unnecessary, it is not necessary to provide a heat dissipation mechanism for sufficiently exhibiting the cooling effect of the Peltier element. Therefore, cost reduction of the electrostatic atomizer 21 can be achieved. Moreover, since the electrostatic atomizer 21 can be reduced in size, the degree of freedom of the installation position of the electrostatic atomizer 21 can be remarkably improved in an air conditioner with limited space. .

(Second Embodiment)
Next, a second embodiment will be described. This embodiment differs in the structure of the electrostatic atomizer. Only different points will be described below.

As shown in FIGS. 11 and 12, the electrostatic atomizer 51 includes a discharge electrode member 54 inside a case 52 made of an insulating material such as a plastic material.
The discharge electrode member 54 is also obtained by impregnating a porous material having water absorption and water retention with a substance having self-water absorption, and therefore, when the humidity of the surrounding atmosphere exceeds a predetermined value, moisture in the air Demonstrates self-water absorption that absorbs spontaneously. In this case, the discharge electrode member 54 has a support portion provided inside the case 52 in an inclined state so that the tip end side (mist discharge portion side) is high and the base end side (water supply portion side) is low. 52a is supported. An electrode (not shown) is in contact with the base end portion of the discharge electrode member 54 thus supported, and a high voltage is applied from a high voltage power source (not shown) through this electrode. .

The case 52 further includes a cover portion 52b and a water receiving portion 52c. The cover part 52 b is a container-like part configured as a main body part of the case 52, and in this case, covers the entire discharge electrode member 54 in the case 52. In addition, the cover part 52b is good also as a structure which covers at least a water supply part among the discharge electrode members 54 instead of covering the whole discharge electrode member 54. FIG. That is, the electrostatic atomizer 51 may have a configuration in which, for example, a portion of the discharge electrode member 54 excluding the water supply portion, that is, a mist discharge portion at the tip portion is not covered with the cover portion 52b and protrudes from the case 52.

The water receiving portion 52c is a container-like portion formed by partitioning the inside of the case 52 by the support portion 52a, has a smaller volume than the cover portion 52b, and is a discharge electrode member supported in the case 52. 54 is provided below the base end of the water supply section. In addition, a communication hole 52 d that communicates the inside and the outside of the case 52 is provided in a portion of the side wall portion of the case 52 that does not constitute the water receiving portion 52 c. Further, the side wall of the case 52 is provided with a protruding portion 52e that protrudes outward. The electrostatic atomizer 51 is installed in the air outlet 16 by hooking and fixing the protruding portion 52e to the mounting portion 16b provided on the wall portion 16a constituting the air outlet 16.

In the electrostatic atomizer 51 installed in this way, the air outside the case 52, that is, the air present in the air outlet 16 flows into the case 52 through the communication hole 52 d, and the discharge electrode member 54. To touch. As a result, moisture contained in the air in contact with the discharge electrode member 54 is absorbed by the discharge electrode member 54 and supplied to the mist discharge portion at the tip.

When a high voltage is applied to the discharge electrode member 54 in a state where water is contained in the discharge electrode member 54, a mist containing hydroxy radicals is generated from the distal end portion of the discharge electrode member 54, that is, the mist emission portion. The generated mist is discharged to the outside of the case 52 through the communication hole 52d and blown into the room together with the air flowing through the air outlet 16. The communication hole 52d can function as an air inflow hole or an air and mist discharge hole depending on the installation direction of the electrostatic atomizer 51 with respect to the direction of air flowing through the air outlet 16. Can do. For example, in the example shown in FIG. 11, the communication hole 52d located on the windward side of the air flowing through the air outlet 16 (see arrow c) mainly functions as an air inflow hole, and the other communication holes 52d are It mainly functions as a discharge hole for air and mist (see arrow d). Regardless of the installation direction of the electrostatic atomizer 51, all the communication holes 52d function as air inflow holes and outflow holes in a state where air does not flow through the air outlet 16.

Since this electrostatic atomizer 51 also uses water absorbed from the air as water to be discharged as mist, there is no need to provide a Peltier element or a heat dissipation mechanism. Therefore, cost reduction and size reduction of the electrostatic atomizer 51 can be achieved.

The air conditioner of each embodiment described above mounts the electrostatic atomizer at any position between the air inlet and the air outlet. The electrostatic atomizer includes a mist discharge unit that discharges mist and a water supply unit that has self-water absorption to absorb moisture in the air and supplies the absorbed water to the mist discharge unit. According to this configuration, there is no need to provide a Peltier element for supplying water to the mist discharge part, and a heat dissipation mechanism for sufficiently exerting the cooling effect by the Peltier element, thereby reducing the cost and size of the electrostatic atomizer. Can be achieved.

In addition, in an air conditioner, the mounting position of the electrostatic atomizer can be changed as appropriate. Preferably, the position is easy to contact air, for example, from the air inlet 15 to the air outlet 16 of the indoor unit 10. It is possible to select and mount an appropriate position in between.

Moreover, you may implement combining the above-mentioned each embodiment.
Each above-mentioned embodiment is shown as an example and is not intending limiting the range of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

Claims (8)

An electrostatic atomizer comprising: a mist discharge unit that discharges mist; and a water supply unit that has self-water absorption to absorb moisture in the air and supplies the absorbed water to the mist discharge unit. Air conditioner mounted between the air outlet and the air outlet. The air conditioner according to claim 1, wherein the water supply part has a phosphate-based deliquescent material. The air conditioner according to claim 2, wherein the water supply unit has at least one substance having a molecular weight of 300 or more as the deliquescent substance. The air conditioner according to any one of claims 1 to 3, wherein the mist discharge portion is provided integrally with the water supply portion, and a discharge electrode member is formed by the mist discharge portion and the water supply portion. The air conditioner according to claim 4, wherein the discharge electrode member has the deliquescent material. The air conditioner according to claim 4, wherein the deliquescent substance is included in a part of the discharge electrode member. The water supply unit is disposed above the drain pan,
The air conditioner of any one of Claim 1 to 6 provided with the water guide part which guides the water overflowing from the said water supply part to the said drain pan. The water supply portion is disposed in the air outlet;
A cover portion covering the water supply portion;
A water receiving portion provided below the water supply portion;
An air conditioner according to any one of claims 1 to 6.

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