JPWO2020170363A1 - Indoor unit and air conditioner - Google Patents

Abstract

The indoor unit includes a housing that forms an outer shell, a fan that is housed in the housing and takes in fluid from the outside, a heat exchanger that exchanges heat between the fluid sent from the fan and the refrigerant, and a housing. It is equipped with a drain pan that is fixed to the inner wall 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 is for positioning the bell mouth. The bell mouth has a plurality of drain pan side fitting means, and the bell mouth has a plurality of bell mouth side fitting means for each fitting with the plurality of drain pan side fitting means.

Description

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

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

For example, Patent Document 1 discloses an indoor unit in which one rectangular convex shape for positioning is formed on the bell mouth side and one positioning instrument having a rectangular concave shape for positioning 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 device on the drain pan side are fitted. As a result, the bell mouth is positioned, and the movement in the rotational direction around the screw at the time of fixing the screw is regulated.

International Publication No. 2016/185576

However, in the indoor unit described in Patent Document 1, positioning is performed by fitting one place by the convex shape on the bell mouth side and the concave shape on the drain pan side and fixing the screw at one place. 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, the screws need to be fastened in a certain order. Therefore, there is a problem that workability when assembling the indoor unit is poor.

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

The indoor unit of the present invention is a heat exchanger that exchanges heat between a housing forming an outer shell, a fan housed in the housing and taking in fluid from the outside, and a fluid and a refrigerant sent out from the fan. A drain pan fixed to the inner wall of the housing to collect drain water generated from the heat exchanger, and a bell mouth attached to the drain pan to rectify 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 for each fitting with the plurality of the drain pan side fitting means. It is a thing.

Further, the air conditioner of the present invention includes the above-mentioned 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 only 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 workability can be improved.

It is a perspective view which shows an example of the appearance of the indoor unit which concerns on Embodiment 1. FIG. It is the schematic when the indoor unit of FIG. 1 is seen from the lower surface side. It is an exploded perspective view which shows an example of the structure of the indoor unit of FIG. It is an enlarged view of the main part for demonstrating the attachment relationship of the drain pan and the bell mouth of FIG. It is a perspective view which shows an example of the shape of the fitting recess 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 the positioning of the bell mouth with respect to the drain pan in the indoor unit according to the first embodiment. It is a perspective view for demonstrating screw fixing of a bell mouth to a drain pan in the indoor unit which concerns on Embodiment 1. FIG. It is an enlarged view of the main part for demonstrating the attachment relationship of the drain pan and the bell mouth which concerns on Embodiment 2. FIG. It is a perspective view which shows an example of the shape of the 1st fitting recess and the 2nd fitting recess of FIG. FIG. 5 is a schematic cross-sectional view for explaining the positioning of the bell mouth with respect to the drain pan in the indoor unit according to the first embodiment. It is the schematic which shows an example of the structure of the air conditioner which concerns on Embodiment 3. FIG.

Embodiment 1.
Hereinafter, the indoor unit of the air conditioner according to the first embodiment of the present invention will be described. In the drawings below, those with the same reference numerals are the same or equivalent, which is common throughout the specification. The form of the component represented in the full text of the specification is merely an example, and is not limited to the form 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 other embodiments. Then, in the drawings, the relationship between the sizes of the constituent members may differ 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, a four-way cassette type indoor unit 100, which is a ceiling-embedded type installed by being embedded in the ceiling of a room and blows air in four directions, will be described. In the following, the upper side in FIG. 1 will be referred to as an “upper side” and the lower side will be referred to as a “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 facing the room, which is a target space for air conditioning or the like, and a decorative panel 120 having a substantially quadrangular shape in a plan view is attached to the opening. A grill 121 serving as a suction port for taking indoor air into the indoor unit 100 is provided near the center of the decorative panel 120.

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, respectively. Each outlet 122 is provided with a flap 123 for changing the wind direction. Each flap 123 is rotationally driven around an axis by driving a motor (not shown).

FIG. 2 is a schematic view of the indoor unit 100 of FIG. 1 when 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. Note that FIG. 2 shows 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 turbofan 130, which is a fan, is provided near the inner center of the housing 110 of the indoor unit 100. The turbofan 130 is a centrifugal fan, and is driven by a motor (not shown) to send out air flowing in from a grill 121 provided on the upstream side in the air flow direction to the side (left-right direction in FIG. 3).

An indoor heat exchanger 10 is installed around the turbofan 130. The indoor heat exchanger 10 is supplied with air sent from the turbo fan 130, and exchanges heat 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 turbofan 130. The bell mouth 150 rectifies the air as a fluid flowing from the grill 121 and sends it to the turbofan 130. The bell mouth 150 is attached to the drain pan 140.

The drain pan 140 is molded from a synthetic resin such as Styrofoam. The drain pan 140 is provided below the indoor heat exchanger 10 and collects the 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 from the grill 121 passes at a position at 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 is passed and sent to the outlet 122.

Inside the indoor unit 100, an air passage from the grill 121 to the air outlet 122 is formed by the above configuration. That is, the grill 121, the bell mouth 150 (main body suction port 141), the turbo fan 130, the indoor heat exchanger 10, the main body air outlet 142 and the air 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 a main part for explaining the attachment 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, which are fitting means on the drain pan side. 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 near at least two corners of the four corners of the drain pan 140, for example.

The bell mouth 150 is provided with a plurality of fitting protrusions 155, which are fitting means on the bell mouth side. The plurality of fitting convex portions 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 protrusions 155 are provided at positions corresponding to the plurality of fitting recesses 145 when the bell mouth 150 is attached to the drain pan 140.

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

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 convex portion 155 of FIG. As shown in FIG. 5, each of the plurality of fitting recesses 145 is formed in a round hole shape. As shown in FIG. 6, the plurality of fitting convex portions 155 are each formed in a cylindrical shape. The external dimensions of the fitting convex portion 155 are formed so as 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 convex portion 155 is formed along the fitting concave portion 145. As a result, the fitting convex portion 155 is press-fitted into the fitting concave portion 145, so that the bell mouth 150 can be reliably fixed to the drain pan 140.

In the examples shown in FIGS. 5 and 6, the case where the fitting recess 145 is formed in a round hole shape and the fitting convex portion 155 is formed in a cylindrical shape is illustrated, but this is limited to this example. I can't. For example, the fitting recess 145 may be formed in a square hole shape, and the fitting convex portion 155 may be formed in a prismatic shape. That is, each outer shape may be formed to have 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 the positioning of the bell mouth 150 with respect to the drain pan 140 in the indoor unit 100 according to the first embodiment. FIG. 8 is a perspective view for explaining screw fixing of the bell mouth 150 to the drain pan 140 in the 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, a plurality of fitting protrusions provided on the bell mouth 150 are provided with respect to the plurality of fitting recesses 145 provided on the drain pan 140. Each portion 155 is fitted. In this way, the bell mouth 150 is positioned with respect to the drain pan 140 by fitting the respective fitting protrusions 155 into the respective fitting recesses 145. Next, the bell mouth 150 is fixed to the drain pan 140 using 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, 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 made 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. Will be 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 the first embodiment, a fitting recess 145 is provided as a drain pan side fitting means, and a fitting convex portion 155 is provided as a bell mouth side fitting means. As a result, 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, so that the bell mouth 150 can be easily and surely positioned.

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 convex portion 155. As a result, the fitting convex portion 155 is fitted into the fitting concave portion 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 protrusions 155 are formed in a cylindrical shape, and the plurality of fitting recesses 145 are formed in a round hole shape. Further, the plurality of fitting convex portions 155 may be formed in a prismatic shape, and the plurality of fitting concave portions 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 by a screw 160 in a state where the drain pan side fitting means and the bell mouth side fitting means are fitted. As a result, 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, Embodiment 2 of the present invention will be described. The second embodiment is different from the first embodiment in that a part of the plurality of fitting recesses 145 is formed in an elongated hole shape. In the following description, the parts common to the first embodiment are 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 the attachment relationship between the drain pan 140 and the bell mouth 150 according to the second embodiment. As shown in FIG. 9, a plurality of fitting convex portions 155, which are bellmouth-side fitting means, are provided on the surface of the bell mouth 150 facing the drain pan 140, as in the first embodiment.

Further, in the second embodiment, the first fitting recess 145a and the second fitting recess 145b are provided as a plurality of fitting recesses 145 as the drain pan side fitting means on the surface of the drain pan 140 facing the bell mouth 150. Is provided. In this example, two fitting recesses 145 are provided in the drain pan 140, one as a first fitting recess 145a and the other 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, the dimension in the direction perpendicular to the straight line connecting the first fitting recess 145a and the second fitting recess 145b, that is, the dimension α in the lateral direction of the second fitting recess 145b. Is formed so as to be the same as or slightly larger than the external dimensions of the cylindrical fitting convex portion 155. As a result, when the fitting convex portion 155 is press-fitted into the second fitting concave portion 145b, it is possible to prevent the fitting concave portion 145 from moving in the lateral direction of the second fitting concave portion 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 longer than the external dimensions of the fitting convex portion 155. This is for fitting even if there is an individual difference in the distance between the plurality of fitting recesses 145 or between the plurality of fitting protrusions 155 due to heat shrinkage or the like when molding the drain pan 140 or the bell mouth 150. This is so that the concave portion 145 and the fitting convex portion 155 can be fitted.

[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 the positioning of the bell mouth 150 with respect to the drain pan 140 in the 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, a plurality of fitting recesses 145 (first fitting recess 145a and second fitting recess 145b) of the drain pan 140 are attached to the drain pan 140, as in the first embodiment. ), The fitting convex portion 155 of the bell mouth 150 is fitted, respectively. At this time, the second fitting recess 145b has an elongated hole shape that is long in a direction parallel to the 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 each 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, as in the above description, the elongated hole-shaped first fitting recess 145a absorbs individual differences in dimensions depending on the shape, and the bell mouth 150 is reliably positioned.

As described above, in the indoor unit 100 according to the second embodiment, 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 a direction parallel to the straight line connecting the first fitting recess 145a and the second fitting recess 145b. .. As a result, 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 can be reliably positioned with respect to the drain pan 140.

Embodiment 3.
Next, Embodiment 3 of the present invention will be described. The third embodiment describes 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 view 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 is composed of 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 a 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 in the low-temperature and low-pressure refrigerant, compresses the sucked refrigerant, and discharges the high-temperature and high-pressure refrigerant. The compressor 20 is composed of, for example, an inverter compressor or the like whose capacity, which is the amount of transmission per unit time, is controlled by changing the operating frequency.

The refrigerant flow path switching device 21 is, for example, a four-way valve, and switches between cooling operation and heating operation by switching the flow 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 path 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 dissipates 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, an electronic expansion valve or a valve capable of controlling the opening degree.

(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 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 the cooling operation, and cools the air in the air-conditioned space to cool the air. Further, the indoor heat exchanger 10 functions as a condenser during the heating operation, and heats the air in the air-conditioned space to heat the room.

The indoor blower 11 supplies air to the indoor heat exchanger 10. In the third embodiment, the turbofan 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 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 path 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 and low-pressure refrigerant is compressed by the compressor 20 and discharged as a high-temperature and high-pressure gas refrigerant.

The high-temperature and high-pressure gas refrigerant discharged from the compressor 20 flows into the outdoor heat exchanger 22 via the refrigerant flow path switching device 21. The high-temperature and high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 22 exchanges heat with the outdoor air taken in by the outdoor blower 23, condenses while radiating heat, becomes a high-pressure liquid refrigerant, and flows out of the outdoor heat exchanger 22. .. The high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 22 is depressurized by the expansion valve 24 to become a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows out from 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 that has flowed 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 heat, becomes a low-pressure gas refrigerant, 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 path switching device 21, and is sucked into the compressor 20.

(Heating operation)
During the heating operation, the refrigerant flow path 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 and low-pressure refrigerant is compressed by the compressor 20 and discharged as a high-temperature and high-pressure gas refrigerant. 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 that has flowed 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 of the indoor heat exchanger 10 flows out from the indoor unit 100. The high-pressure liquid refrigerant flowing out of 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 a low-temperature low-pressure gas-liquid two-phase refrigerant that is decompressed by the expansion valve 24 to become a low-temperature low-pressure gas-liquid two-phase refrigerant that 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, absorbs heat and evaporates, and becomes 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 path switching device 21 and is sucked into the compressor 20.

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

Although embodiments 1 to 3 of the present invention have been described above, the present invention is not limited to the above-described embodiments 1 to 3 of the present invention, and varies within the range not deviating from the gist of the present invention. Can be transformed and applied. In the first and second embodiments, the drain pan 140 is provided with the fitting recess 145, and the bell mouth 150 is provided with the fitting protrusion 155, but this is not limited to this example. For example, the drain pan 140 may be provided with a fitting convex portion 155, and the bell mouth 150 may be provided with a fitting concave portion 145. Also by 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, so that the bell mouth 150 can be easily and surely mounted. Can be positioned.

1 Air conditioner, 2 Refrigerant piping, 10 Indoor heat exchanger, 11 Indoor blower, 20 Compressor, 21 Refrigerant flow path 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 turbo fan, 140 drain pan, 141 main body suction port, 142 main body outlet, 145 fitting recess, 145a first fitting recess, 145b second fitting Concave, 150 bell mouth, 155 fitting convex, 160 screws, 200 outdoor unit.

The indoor unit of the present invention is a heat exchanger that exchanges heat between a housing forming an outer shell, a fan housed in the housing and taking in fluid from the outside, and a fluid and a refrigerant sent out from the fan. A drain pan fixed to the inner wall of the housing to collect drain water generated from the heat exchanger, and a bell mouth attached to the drain pan to rectify the fluid taken in by the fan. The bell mouth has a plurality of drain pan side fitting means provided in the vicinity of at least two corners of the four corners for positioning the bell mouth, and the bell mouth has a plurality of the above-mentioned bell mouths. It has a plurality of bellmouth-side fitting means for mating with the drain pan-side fitting means.

Claims (10)

The housing that forms the outer shell and
A fan housed in the housing and taking in fluid from the outside,
A heat exchanger that exchanges heat between the fluid sent from the fan and the refrigerant,
A drain pan fixed to the inner wall of the housing and collecting drain water generated from the heat exchanger.
It is equipped with a bell mouth that is attached to the drain pan and rectifies the fluid taken in by the fan.
The drain pan
It has a plurality of drain pan side fitting means for positioning the bell mouth, and has a plurality of drain pan side fitting means.
The bell mouth
An indoor unit having a plurality of bell mouth-side fitting means for fitting each of the plurality of drain pan-side fitting means. The drain pan side fitting means is a fitting recess provided on a surface facing the bell mouth in a direction opposite to that of the bell mouth.
The indoor unit according to claim 1, wherein the bell mouth-side fitting means is a fitting convex portion that protrudes in the direction of the drain pan from a surface facing the drain pan and fits into the fitting concave portion. The drain pan side fitting means is a fitting convex portion that protrudes in the direction of the bell mouth from a surface facing the bell mouth.
The indoor unit according to claim 1, wherein the bell mouth-side fitting means is provided on a surface facing the drain pan in a direction opposite to that of the drain pan, and is a fitting recess into which the fitting convex portion is fitted. The indoor unit according to claim 2 or 3, wherein the plurality of fitting concave portions are formed in a shape along the outer shape of the fitting convex portion. The plurality of fitting protrusions 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 protrusions are formed in a prismatic 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 protrusions are formed in a cylindrical shape.
The indoor unit according to claim 2 or 3, wherein at least one of the 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
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 fitted to the drain pan with screws. The indoor unit according to any one of claims 1 to 9, and the indoor unit.
An air conditioner including an outdoor unit that supplies heat to the indoor unit.

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