WO2020170363A1

WO2020170363A1 - Indoor unit and air conditioner

Info

Publication number: WO2020170363A1
Application number: PCT/JP2019/006347
Authority: WO
Inventors: 健太林; 辰夫古田; 圭佑友村
Original assignee: 三菱電機株式会社
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-08-27
Also published as: CN211650468U; JPWO2020170363A1

Abstract

An indoor unit is provided with: a housing that forms an outer shell; a fan that is accommodated in the housing and takes in a fluid from an outside; a heat exchanger that performs heat exchange between the fluid discharged from the fan and a refrigerant; a drain pan that is fixed to an inner wall of the housing and collects drain water generated from the heat exchanger; and a bell mouth that is attached to the drain pan and rectifies the fluid taken in by the fan. The drain pan has a plurality of drain pan side fitting means for positioning the bell mouth, and the bell mouth has a plurality of bell mouth side fitting means for fitting in the plurality of drain pan side fitting means, respectively.

Description

Indoor unit and air conditioner

The present invention relates to an indoor unit and an air conditioner that perform air conditioning of a target space.

Conventionally, an indoor unit of an air conditioner has been equipped with a bell mouth for rectifying air when supplying air that flows in from a suction port to a fan. The bell mouth is attached, for example, by fixing it to a drain pan installed below an indoor heat exchanger provided in the indoor unit with a screw. Such an indoor unit has a structure for performing positioning when fixing the bell mouth to the drain pan.

For example, Patent Document 1 discloses an indoor unit in which a positioning rectangular convex shape is formed on the bell mouth side and a positioning device having a rectangular positioning concave shape is provided on the drain pan side. Has been done. In this indoor unit, the bell mouth is screwed to the drain pan after the convex shape on the bell mouth side and the concave shape of the positioning tool on the drain pan side are fitted. As a result, the bell mouth is positioned and the movement in the rotation direction around the screw at the time of fixing the screw is restricted.

International Publication No. 2016/185576

However, in the indoor unit described in Patent Document 1, positioning is performed by fitting at one location with the convex shape on the bell mouth side and concave shape on the drain pan side, and by fixing the screw at one location. Specifically, in order to position the bell mouth, a predetermined screw is first fastened in a state where the convex shape and the concave shape are fitted, and then the remaining screws are fastened. That is, in this indoor unit, it is necessary to fasten the screws in a fixed order. Therefore, there is a problem that workability in assembling the indoor unit is poor.

The present invention has been made in view of the above problems, and an object thereof is to provide an indoor unit and an air conditioner that can easily perform positioning of the bell mouth with respect to the drain pan and improve workability. ..

The indoor unit of the present invention includes a housing that forms an outer shell, a fan that is housed in the housing and that receives a fluid from the outside, and a heat exchanger that performs heat exchange between the fluid sent from the fan and the refrigerant. A drain pan fixed to the inner wall of the housing for collecting drain water generated from the heat exchanger; and a bell mouth attached to the drain pan for rectifying the fluid taken in by the fan. Has a plurality of drain pan side fitting means for positioning the bell mouth, and the bell mouth has a plurality of bell mouth side fitting means respectively fitted with the plurality of drain pan side fitting means It is a thing.

The air conditioner of the present invention includes the above indoor unit and an outdoor unit that supplies heat to the indoor unit.

As described above, according to the present invention, the bell mouth is positioned with respect to the drain pan simply by fitting the plurality of drain pan side fitting means and the plurality of bell mouth side fitting means.
Therefore, the bell mouth can be easily positioned with respect to the drain pan, and the workability can be improved.

FIG. 3 is a perspective view showing an example of an external appearance of the indoor unit according to Embodiment 1. It is a schematic diagram when the indoor unit of FIG. 1 is seen from the lower surface side. It is an exploded perspective view showing an example of composition of an indoor unit of Drawing 2. It is a principal part enlarged view for demonstrating the attachment relation of the drain pan and bell mouth of FIG. It is a perspective view which shows an example of the shape of the recessed part for fitting of FIG. It is a perspective view which shows an example of the shape of the convex part for fitting of FIG. FIG. 5 is a schematic cross-sectional view for explaining positioning of the bell mouth with respect to the drain pan in the indoor unit according to the first embodiment. FIG. 5 is a perspective view for explaining screw fixing of the bell mouth to the drain pan in the indoor unit according to the first embodiment. FIG. 7 is an enlarged view of a main part for explaining a mounting relationship between a drain pan and a bell mouth according to the second embodiment. It is a perspective view which shows an example of the shape of the 1st fitting recessed part and the 2nd fitting recessed part of FIG. FIG. 4 is a schematic cross-sectional view for explaining positioning of the bell mouth with respect to the drain pan in the indoor unit according to the first embodiment. It is a schematic diagram showing an example of composition of an air harmony machine concerning a 3rd embodiment.

Embodiment 1.
Hereinafter, the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention will be described. In the following drawings, the same reference numerals are the same or equivalent, and this is common to all the texts of the specification. The forms of the constituent elements shown in the entire text of the specification are merely examples, and are not limited to the forms described in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, in the drawings, the size relationship of each component may be different from the actual one.

[Structure of indoor unit 100]
FIG. 1 is a perspective view showing an example of the appearance of the indoor unit 100 according to the first embodiment. In the first embodiment, an indoor unit 100 of a four-way cassette type, which is a ceiling-embedded type that is installed by being embedded in a ceiling in a room and blows air in four directions, will be described. In the following description, the upper side in FIG. 1 is referred to as “upper side” and the lower side is referred to as “lower side”.

As shown in FIG. 1, the indoor unit 100 has a housing 110 that forms an outer shell. The housing 110 has an opening on the lower surface that faces the room that is the target space for air conditioning, and the decorative panel 120 having a substantially rectangular shape in plan view is attached to the opening. Near the center of the decorative panel 120, a grill 121 serving as a suction port for taking in indoor air into the indoor unit 100 is provided.

The decorative panel 120 is formed with four air outlets 122 for blowing out the air taken into the indoor unit 100. These four outlets 122 are formed along each side of the decorative panel 120. Each of the outlets 122 is provided with a flap 123 that changes the wind direction. Each flap 123 is rotationally driven about its axis by driving a motor (not shown).

FIG. 2 is a schematic view of the indoor unit 100 of FIG. 1 viewed from the lower surface side. FIG. 3 is an exploded perspective view showing an example of the configuration of the indoor unit 100 of FIG. 2 illustrates a state in which the decorative panel 120 is removed in order to explain the internal configuration of the indoor unit 100. Further, in FIG. 3, the decorative panel 120 is omitted.

As shown in FIGS. 2 and 3, a turbo fan 130, which is a fan, is provided near the center of the inside of the housing 110 of the indoor unit 100. The turbo fan 130 is a centrifugal blower, and when a motor (not shown) is driven, the turbo fan 130 blows out the air that has flowed in from the grill 121 provided on the upstream side in the air flow direction to the side (the lateral direction in FIG. 3).

The indoor heat exchanger 10 is installed around the turbo fan 130. The indoor heat exchanger 10 is supplied with the air sent from the turbo fan 130, and performs heat exchange between this air and a refrigerant flowing in a heat transfer tube (not shown) provided in the indoor heat exchanger 10.

A bell mouth 150 is installed on the upstream side of the turbo fan 130. The bell mouth 150 rectifies the air as a fluid flowing from the grill 121 and sends it to the turbo fan 130. The bell mouth 150 is attached to the drain pan 140.

The drain pan 140 is formed using, for example, a synthetic resin such as Styrofoam. The drain pan 140 is provided below the indoor heat exchanger 10 and collects drain water generated from the indoor heat exchanger 10. The drain pan 140 is fixed to the inner wall of the housing 110. The drain pan 140 is formed with a through hole as a main body suction port 141 through which the air flowing in from the grill 121 passes, at a position which is the center of the lower surface of the indoor unit 100.

A bell mouth 150 is attached around the main body suction port 141 of the drain pan 140. Further, the drain pan 140 is formed with a through hole as a main body outlet 142 through which the air flowing out from the indoor heat exchanger 10 passes and is sent to the outlet 122.

The interior of the indoor unit 100 has an air passage extending from the grill 121 to the air outlet 122 with the above configuration. That is, the grill 121, the bell mouth 150 (main body inlet 141), the turbofan 130, the indoor heat exchanger 10, the main body outlet 142, and the outlet 122 are located on the air passage from the upstream side in the air flow direction. There is.

FIG. 4 is an enlarged view of an essential part for explaining the mounting relationship between the drain pan 140 and the bell mouth 150 of FIG. As shown in FIG. 4, the drain pan 140 is provided with a plurality of fitting recesses 145 serving as drain pan side fitting means. The plurality of fitting recesses 145 are provided on the surface facing the bell mouth 150 as recesses or through holes in the direction opposite to the bell mouth 150. Further, the plurality of fitting recesses 145 are provided, for example, in the vicinity of at least two corners of the four corners of the drain pan 140.

The bell mouth 150 is provided with a plurality of fitting protrusions 155 which are bell mouth side fitting means. The plurality of fitting protrusions 155 are provided on the surface facing the drain pan 140 so as to project in the direction of the drain pan 140. Further, the plurality of fitting convex portions 155 are respectively provided at positions corresponding to the plurality of fitting concave portions 145 when the bell mouth 150 is attached to the drain pan 140.

In the first embodiment, the fitting concave portion 145 and the fitting convex portion 155 are provided at two places respectively, but the present invention is not limited to this, and the fitting concave portion 145 and the fitting convex portion 155 are not limited to this. It may be provided at three or more locations.

FIG. 5 is a perspective view showing an example of the shape of the fitting recess 145 of FIG. FIG. 6 is a perspective view showing an example of the shape of the fitting protrusion 155 of FIG. As shown in FIG. 5, the plurality of fitting recesses 145 are each formed in a round hole shape. As shown in FIG. 6, the plurality of fitting protrusions 155 are each formed in a cylindrical shape. The external dimensions of the fitting convex portion 155 are formed to be the same as or slightly smaller than the inner diameter of the fitting concave portion 145 provided in the drain pan 140. That is, the outer shape of the fitting projection 155 is formed along the fitting recess 145. As a result, the fitting protrusion 155 is press-fitted into the fitting recess 145, so that the bell mouth 150 can be securely fixed to the drain pan 140.

5 and 6, the fitting recess 145 is formed in the shape of a round hole and the fitting projection 155 is formed in the shape of a cylinder, but this is not the only example. I can't. For example, the fitting recess 145 may be formed in a square hole shape, and the fitting projection 155 may be formed in a prism shape. That is, each outer shape may be formed into a square shape.

[Fixing the bell mouth 150 to the drain pan 140]
Next, a method of fixing the bell mouth 150 to the drain pan 140 in the indoor unit 100 according to the first embodiment will be described. FIG. 7 is a schematic cross-sectional view for explaining positioning of bell mouth 150 with respect to drain pan 140 in indoor unit 100 according to the first embodiment. FIG. 8 is a perspective view for explaining screw fixing of bell mouth 150 to drain pan 140 in indoor unit 100 according to the first embodiment.

When the bell mouth 150 is attached to the drain pan 140, first, as shown in FIG. 7, the plurality of fitting protrusions 145 provided on the bell mouth 150 are fitted to the plurality of fitting recesses 145 provided on the drain pan 140. The parts 155 are fitted together. In this way, by fitting the fitting protrusions 155 in the fitting recesses 145, the bell mouth 150 is positioned with respect to the drain pan 140. Next, the bell mouth 150 is fixed to the drain pan 140 with a plurality of screws 160 as shown in FIG. 8 in a state where the bell mouth 150 is positioned with respect to the drain pan 140.

Here, in the first embodiment, the positioning is performed by the fitting concave portion 145 and the fitting convex portion 155. Therefore, the plurality of screws 160 may be fastened from any position. That is, in the indoor unit 100 according to the first embodiment, the fastening order of the plurality of screws 160 can be set in any order.

As described above, in the indoor unit 100 according to the first embodiment, the bell mouth 150 can be positioned with respect to the drain pan 140 only by fitting the plurality of drain pan side fitting means and the plurality of bell mouth side fitting means. Done. Therefore, the bell mouth 150 can be easily positioned with respect to the drain pan 140, and the workability can be improved.

In the indoor unit 100 according to Embodiment 1, the fitting concave portion 145 is provided as the drain pan side fitting means, and the fitting convex portion 155 is provided as the bell mouth side fitting means. Accordingly, when the bell mouth 150 is attached to the drain pan 140, the fitting concave portion 145 and the fitting convex portion 155 are fitted to each other, so that the bell mouth 150 can be positioned easily and reliably.

In the indoor unit 100 according to the first embodiment, the plurality of fitting recesses 145 are formed in a shape along the outer shape of the fitting projection 155. As a result, the fitting protrusion 155 is fitted into the fitting recess 145 by press fitting or the like, so that the bell mouth 150 can be reliably positioned with respect to the drain pan 140.

The plurality of fitting convex portions 155 are formed in a cylindrical shape, and the plurality of fitting concave portions 145 are formed in a round hole shape. In addition, the plurality of fitting protrusions 155 may be formed in a prism shape, and the plurality of fitting recesses 145 may be formed in a square hole shape.

In the indoor unit 100 according to the first embodiment, the bell mouth 150 is fixed to the drain pan 140 with the screw 160 while the drain pan side fitting means and the bell mouth side fitting means are fitted to each other. Accordingly, the bell mouth 150 can be securely fixed to the drain pan 140 in a state where the bell mouth 150 is positioned on the drain pan 140.

Embodiment 2.
Next, a second embodiment of the present invention will be described. The second embodiment differs from the first embodiment in that a part of the plurality of fitting recesses 145 is formed into an elongated hole shape. In the following description, the same parts as those in the first embodiment will be designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 9 is an enlarged view of a main part for explaining a mounting relationship between the drain pan 140 and the bell mouth 150 according to the second embodiment. As shown in FIG. 9, on the surface of the bell mouth 150 facing the drain pan 140, as in the first embodiment, a plurality of fitting protrusions 155 which are bell mouth side fitting means are provided.

Further, in the second embodiment, the first fitting recess 145a and the second fitting recess 145b are provided on the surface of the drain pan 140 facing the bell mouth 150 as a plurality of fitting recesses 145 which are drain pan side fitting means. Is provided. In this example, two fitting recesses 145 are provided in the drain pan 140, one is provided as a first fitting recess 145a, and the other is provided as a second fitting recess 145b.

FIG. 10 is a perspective view showing an example of the shapes of the first fitting recess 145a and the second fitting recess 145b of FIG. As shown in FIG. 10, the first fitting recess 145a is formed in a round hole shape like the fitting recess 145 of the first embodiment.

The second fitting recess 145b is formed in an elongated hole shape. Here, in the second fitting recess 145b, a dimension in a direction perpendicular to a straight line connecting the first fitting recess 145a and the second fitting recess 145b, that is, a dimension α in the lateral direction of the second fitting recess 145b. Are formed so as to have the same outer dimension as the fitting protrusion 155 having a cylindrical shape or slightly larger than the outer dimension. Thereby, when the fitting protrusion 155 is press-fitted into the second fitting recess 145b, the fitting recess 145 can be prevented from moving in the lateral direction of the second fitting recess 145b.

On the other hand, in the second fitting recess 145b, the dimension in the direction parallel to the straight line connecting the first fitting recess 145a and the second fitting recess 145b, that is, the dimension β in the longitudinal direction of the second fitting recess 145b is It is formed to be longer than the outer dimension of the fitting protrusion 155. This is because even when the distance between the plurality of fitting concave portions 145 or the plurality of fitting convex portions 155 is different due to heat shrinkage or the like when molding the drain pan 140 or the bell mouth 150, the fitting This is so that the concave portion 145 and the fitting convex portion 155 can be fitted together.

[Positioning of bell mouth 150 with respect to drain pan 140]
Next, the positioning of the bell mouth 150 with respect to the drain pan 140 in the indoor unit 100 according to the second embodiment will be described. FIG. 11 is a schematic cross-sectional view for explaining positioning of bell mouth 150 with respect to drain pan 140 in indoor unit 100 according to the first embodiment.

As shown in FIG. 11, when the bell mouth 150 is attached to the drain pan 140, the plurality of fitting recesses 145 (the first fitting recess 145a and the second fitting recess 145b) of the drain pan 140 are provided as in the first embodiment. ), the fitting protrusions 155 of the bell mouth 150 are fitted respectively. At this time, the second fitting recess 145b has an elongated hole shape that is long in a direction parallel to a straight line connecting the first fitting recess 145a and the second fitting recess 145b. Therefore, even if there are individual differences in the dimensions of the drain pan 140 or the bell mouth 150, the elongated holes absorb the individual differences in the dimensions, so that the bell mouth 150 is reliably positioned with respect to the drain pan 140.

In this example, the case where the fitting concave portion 145 and the fitting convex portion 155 are provided at two locations respectively has been described, but the fitting concave portion 145 and the fitting convex portion 155 may be provided at three or more locations. In this case, at least one of the three or more fitting protrusions 155 is formed as the first fitting recess 145a, and the rest is formed as the second fitting recess 145b. As a result, similarly to the above description, the first fitting recess 145a in the shape of the elongated hole absorbs individual differences in size due to the shape, and the bell mouth 150 is reliably positioned.

As described above, in the indoor unit 100 according to Embodiment 2, the plurality of fitting protrusions 155 are formed in a cylindrical shape, and at least one of the plurality of fitting recesses 145 has the first fitting recess 145a. It is formed in a round hole shape, and the remaining second fitting recess 145b is formed in an elongated hole shape. At this time, the elongated hole shape of the second fitting recess 145b is such that the second fitting recess 145b is formed long in the direction parallel to the straight line connecting the first fitting recess 145a and the second fitting recess 145b. .. As a result, even if the dimensions of the drain pan 140 or the bell mouth 150 have individual differences, the elongated holes absorb the individual differences of the dimensions, so that the bell mouth 150 can be reliably positioned with respect to the drain pan 140.

Embodiment 3.
Next, a third embodiment of the invention will be described. The third embodiment will describe an air conditioner to which the indoor unit 100 according to the first or second embodiment described above is applied.

FIG. 12 is a schematic diagram showing an example of the configuration of the air conditioner 1 according to the third embodiment. As shown in FIG. 12, the air conditioner 1 includes an indoor unit 100 and an outdoor unit 200. A refrigerant circuit is formed by connecting the indoor unit 100 and the outdoor unit 200 with the refrigerant pipe 2.

[Configuration of air conditioner 1]
(Outdoor unit 200)
The outdoor unit 200 supplies heat to the indoor unit 100, and includes a compressor 20, a refrigerant flow path switching device 21, an outdoor heat exchanger 22, an outdoor blower 23, and an expansion valve 24. The compressor 20 sucks a low-temperature low-pressure refrigerant, compresses the sucked refrigerant, and discharges a high-temperature high-pressure refrigerant. The compressor 20 is composed of, for example, an inverter compressor whose capacity, which is a delivery amount per unit time, is controlled by changing an operating frequency.

The refrigerant passage switching device 21 is, for example, a four-way valve, and switches between the cooling operation and the heating operation by switching the flowing direction of the refrigerant. The refrigerant flow path switching device 21 switches to the state shown by the solid line in FIG. 12 during the cooling operation. Further, the refrigerant flow switching device 21 switches to the state shown by the dotted line in FIG. 12 during the heating operation.

The outdoor heat exchanger 22 exchanges heat between the outdoor air and the refrigerant. The outdoor heat exchanger 22 functions as a condenser that radiates the heat of the refrigerant to the outdoor air and condenses the refrigerant during the cooling operation. Further, the outdoor heat exchanger 22 functions as an evaporator that evaporates the refrigerant during the heating operation and cools the outdoor air by the heat of vaporization at that time.

The outdoor blower 23 supplies outdoor air to the outdoor heat exchanger 22. The outdoor blower 23 adjusts the amount of air blown to the outdoor heat exchanger 22 according to the rotation speed. The expansion valve 24 expands the refrigerant. The expansion valve 24 is composed of, for example, a valve such as an electronic expansion valve whose opening can be controlled.

(Indoor unit 100)
The indoor unit 100 includes an indoor heat exchanger 10 and an indoor blower 11. The indoor heat exchanger 10 exchanges heat between the air and the refrigerant. As a result, heating air or cooling air supplied to the air-conditioned space is generated. The indoor heat exchanger 10 functions as an evaporator during cooling operation, cools the air in the air-conditioned space, and performs cooling. In addition, the indoor heat exchanger 10 functions as a condenser during heating operation, and heats the air in the air-conditioned space to perform heating.

The indoor blower 11 supplies air to the indoor heat exchanger 10. In the third embodiment, the turbo fan 130 is applied as the indoor blower 11. The indoor blower 11 adjusts the amount of air blown to the indoor heat exchanger 10 according to the rotation speed.

[Operation of the air conditioner 1]
(About the flow of refrigerant)
The operation of the refrigerant in the air conditioner 1 having the above configuration will be described with reference to FIG.

(Cooling operation)
During the cooling operation, the refrigerant flow switching device 21 is switched so that the discharge side of the compressor 20 and the outdoor heat exchanger 22 are connected, as shown by the solid line in FIG. Then, the low-temperature low-pressure refrigerant is compressed by the compressor 20 and becomes a high-temperature high-pressure gas refrigerant and is discharged.

The high-temperature and high-pressure gas refrigerant discharged from the compressor 20 flows into the outdoor heat exchanger 22 via the refrigerant flow switching device 21. The high-temperature and high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 22 condenses while exchanging heat with the outdoor air taken in by the outdoor blower 23 and radiating heat, and flows out of the outdoor heat exchanger 22 as a high-pressure liquid refrigerant. .. The high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 22 is decompressed by the expansion valve 24 to become a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows out of the outdoor unit 200. The low-temperature low-pressure gas-liquid two-phase refrigerant flowing out of the outdoor unit 200 flows into the indoor unit 100 via the refrigerant pipe 2.

The low-temperature low-pressure gas-liquid two-phase refrigerant flowing into the indoor unit 100 flows into the indoor heat exchanger 10. The low-temperature low-pressure gas-liquid two-phase refrigerant that has flowed into the indoor heat exchanger 10 exchanges heat with the indoor air taken in by the indoor blower 11, absorbs and evaporates, and becomes a low-pressure gas refrigerant from the indoor heat exchanger 10. leak. The low-pressure gas refrigerant flowing out of the indoor heat exchanger 10 flows into the outdoor unit 200, passes through the refrigerant flow switching device 21, and is sucked into the compressor 20.

(Heating operation)
During the heating operation, the refrigerant flow switching device 21 is switched so that the discharge side of the compressor 20 and the indoor unit 100 side are connected, as shown by the broken line in FIG. Then, the low-temperature low-pressure refrigerant is compressed by the compressor 20 and becomes a high-temperature high-pressure gas refrigerant and is discharged. The high-temperature and high-pressure gas refrigerant discharged from the compressor 20 flows out from the outdoor unit 200 via the refrigerant flow path switching device 21 and flows into the indoor unit 100 via the refrigerant pipe 2.

The high-temperature and high-pressure gas refrigerant flowing into the indoor unit 100 flows into the indoor heat exchanger 10. The high-temperature and high-pressure gas refrigerant that has flowed into the indoor heat exchanger 10 exchanges heat with the indoor air taken in by the indoor blower 11 and condenses while radiating heat, and becomes a high-pressure liquid refrigerant that flows out of the indoor heat exchanger 10. .. The high-pressure liquid refrigerant flowing out from the indoor heat exchanger 10 flows out from the indoor unit 100. The high-pressure liquid refrigerant flowing out from the indoor unit 100 flows into the outdoor unit 200 via the refrigerant pipe 2.

The high-pressure liquid refrigerant that has flowed into the outdoor unit 200 is decompressed by the expansion valve 24 to become a low-temperature low-pressure gas-liquid two-phase refrigerant, and the low-temperature low-pressure gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 22. The low-temperature low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 22 exchanges heat with the outdoor air taken in by the outdoor blower 23 to absorb and evaporate to become a low-pressure gas refrigerant from the outdoor heat exchanger 22. leak. The low-pressure gas refrigerant flowing out of the outdoor heat exchanger 22 passes through the refrigerant flow switching device 21 and is sucked into the compressor 20.

As described above, the indoor unit 100 described in the first or second embodiment is applied to the air conditioner 1 according to the third embodiment. Thereby, an air conditioner with stable unit performance can be obtained.

Although the first to third embodiments of the present invention have been described above, the present invention is not limited to the above-described first to third embodiments of the present invention, and various modifications are possible without departing from the scope of the present invention. It can be variously modified and applied. In Embodiments 1 and 2, the drain pan 140 is provided with the fitting concave portion 145 and the bell mouth 150 is provided with the fitting convex portion 155, but the present invention is not limited to this example. For example, the drain pan 140 may be provided with the fitting convex portion 155, and the bell mouth 150 may be provided with the fitting concave portion 145. Also with this, as in the first and second embodiments, when the bell mouth 150 is attached to the drain pan 140, the fitting concave portion 145 and the fitting convex portion 155 are fitted to each other, so that the bell mouth 150 can be easily and surely. Can be positioned.

1 air conditioner, 2 refrigerant piping, 10 indoor heat exchanger, 11 indoor blower, 20 compressor, 21 refrigerant flow switching device, 22 outdoor heat exchanger, 23 outdoor blower, 24 expansion valve, 100 indoor unit, 110 housing Body, 120 decorative panel, 121 grill, 122 outlet, 123 flap, 130 turbofan, 140 drain pan, 141 body inlet, 142 body outlet, 145 fitting recess, 145a first fitting recess, 145b second fitting Recess, 150 bell mouth, 155 fitting protrusion, 160 screw, 200 outdoor unit.

Claims

A casing forming an outer shell,
A fan housed in the housing and taking in fluid from the outside,
A heat exchanger that performs heat exchange between the fluid sent from the fan and the refrigerant;
A drain pan that is fixed to the inner wall of the housing and collects drain water generated from the heat exchanger,
A bell mouth attached to the drain pan and rectifying the fluid taken in by the fan,
The drain pan is
Having a plurality of drain pan side fitting means for positioning the bell mouth,
The bell mouth is
An indoor unit having a plurality of bell mouth side fitting means that are fitted with a plurality of the drain pan side fitting means, respectively.
The drain pan side fitting means is a fitting recess provided on the surface facing the bell mouth in a direction opposite to the bell mouth,
The indoor unit according to claim 1, wherein the bellmouth-side fitting means is a fitting protrusion that protrudes in a direction of the drain pan from a surface facing the drain pan and is fitted into the fitting recess.
The drain pan side fitting means is a fitting convex portion projecting in a direction of the bell mouth from a surface facing the bell mouth,
The indoor unit according to claim 1, wherein the bellmouth-side fitting means is a fitting recess provided on a surface facing the drain pan in a direction opposite to the drain pan and into which the fitting projection is fitted.
The indoor unit according to claim 2 or 3, wherein the plurality of fitting recesses are formed in a shape along the outer shape of the fitting projection.
The plurality of fitting convex portions are formed in a cylindrical shape,
The indoor unit according to claim 4, wherein the plurality of fitting recesses are formed in a round hole shape.
The plurality of fitting convex portions are formed in a prism shape,
The indoor unit according to claim 4, wherein the plurality of fitting recesses are formed in a square hole shape.
The plurality of fitting convex portions are formed in a cylindrical shape,
The indoor unit according to claim 2 or 3, wherein at least one of the plurality of fitting recesses is formed in a round hole shape, and the remaining fitting recesses are formed in an elongated hole shape.
The indoor unit according to claim 7, wherein the elongated hole shape is long in a direction parallel to a straight line connecting the round hole-shaped fitting recess and the elongated hole-shaped fitting recess.
The bell mouth is
The indoor unit according to any one of claims 1 to 8, wherein the drain pan side fitting means and the bell mouth side fitting means are fixed to the drain pan with a screw in a fitted state.
An indoor unit according to any one of claims 1 to 9,
An air conditioner comprising: an outdoor unit that supplies heat to the indoor unit.