CN211650468U

CN211650468U - Indoor unit and air conditioner

Info

Publication number: CN211650468U
Application number: CN201990000182.9U
Authority: CN
Inventors: 林健太; 古田辰夫; 友村圭佑
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-10-09
Anticipated expiration: 2029-02-20
Also published as: JPWO2020170363A1; WO2020170363A1

Abstract

The utility model relates to an indoor set and air conditioner, indoor set possess: a housing forming an outer contour; a fan housed in the case and introducing a fluid from the outside; a heat exchanger that exchanges heat between the fluid sent from the fan and the refrigerant; a water collection tray fixed to an inner wall of the case, collecting condensed water generated from the heat exchanger; and a socket attached to the water collection tray and configured to rectify the flow of the fluid introduced by the fan, wherein the water collection tray includes a plurality of water collection tray side fitting units for positioning the socket, and the socket includes a plurality of socket side fitting units that are fitted to the plurality of water collection tray side fitting units, respectively.

Description

Indoor unit and air conditioner

Technical Field

The utility model relates to an indoor set and air conditioner that carry out the air conditioning of object space.

Background

Conventionally, an indoor unit of an air conditioner is provided with a socket for rectifying air when supplying air flowing from an inlet to a fan. The socket is attached by being fixed to a water collection pan provided below an indoor heat exchanger provided in the indoor unit by screws, for example. Such an indoor unit has a structure for positioning when fixing the socket to the water collection pan.

For example, patent document 1 discloses an indoor unit in which a rectangular convex shape for positioning is formed at one location on the socket side, and a positioning tool having a rectangular concave shape for positioning is provided at one location on the drain pan side. In this indoor unit, after the convex shape on the socket side is fitted into the concave shape of the positioning tool on the water collection pan side, the socket is fixed to the water collection pan by the screw. This positions the socket and restricts the movement of the screw in the rotational direction around the screw when the screw is fixed.

Patent document 1: international publication No. 2016/185576

However, in the indoor unit described in patent document 1, positioning is performed by one-point fitting and one-point screw fixing based on the convex shape on the socket side and the concave shape on the catch basin side. Specifically, in order to position the socket, 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 fastening of the screws needs to be performed in a certain order. Therefore, there is a problem that workability in assembling the indoor unit is poor.

SUMMERY OF THE UTILITY MODEL

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 that can easily position a socket with respect to a water collection tray to improve workability.

The utility model discloses an indoor set possesses: a housing forming an outer contour; a fan housed in the case and configured to introduce a fluid from outside; a heat exchanger that exchanges heat between the fluid sent from the fan and the refrigerant; a water collection tray fixed to an inner wall of the case, collecting condensed water generated from the heat exchanger; and a socket attached to the water collection tray and configured to rectify the flow of the fluid introduced by the fan, the water collection tray including a plurality of water collection tray side fitting units for positioning the socket, the socket including a plurality of socket side fitting units that are fitted to the plurality of water collection tray side fitting units, respectively.

Preferably, the drain pan side fitting means is a fitting concave portion provided on a surface facing the socket in a direction opposite to the socket, and the socket side fitting means is a fitting convex portion projecting from a surface facing the water collection pan in a direction of the water collection pan and fitted into the fitting concave portion.

Preferably, the water collecting tray-side fitting means is a fitting convex portion protruding from a surface facing the socket in a direction toward the socket, and the socket-side fitting means is a fitting concave portion provided in a surface facing the water collecting tray in a direction opposite to the water collecting tray and into which the fitting convex portion is fitted.

Preferably, the plurality of fitting concave portions are formed in a shape along an outer shape of the fitting convex portion.

Preferably, the plurality of fitting convex portions are formed in a cylindrical shape, and the plurality of fitting concave portions are formed in a circular hole shape.

Preferably, the plurality of fitting convex portions are formed in a prism shape, and the plurality of fitting concave portions are formed in a polygonal hole shape.

Preferably, the plurality of fitting convex portions are formed in a cylindrical shape, and at least one of the plurality of fitting concave portions is formed in a circular hole shape, and the remaining fitting concave portions are formed in an elongated hole shape.

Preferably, the elongated hole shape is elongated in a direction parallel to a straight line connecting the circular hole-shaped fitting concave portion and the elongated hole-shaped fitting concave portion.

Preferably, the socket is fixed to the water collection tray by a screw in a state where the water collection tray side fitting unit is fitted to the socket side fitting unit.

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

As described above, according to the present invention, the socket can be positioned with respect to the water collecting tray only by fitting the plurality of water collecting tray side fitting units and the plurality of socket side fitting units.

Therefore, the socket can be easily positioned with respect to the water collection tray, and workability can be improved.

Drawings

Fig. 1 is a perspective view showing an example of an external appearance of an indoor unit according to embodiment 1.

Fig. 2 is a simplified view of the indoor unit of fig. 1 as viewed from the bottom surface side.

Fig. 3 is an exploded perspective view showing an example of the structure of the indoor unit of fig. 2.

Fig. 4 is an enlarged view of a main portion for explaining an installation relationship of the water collection tray and the socket of fig. 3.

Fig. 5 is a perspective view showing an example of the shape of the fitting recess in fig. 4.

Fig. 6 is a perspective view showing an example of the shape of the fitting projection in fig. 4.

Fig. 7 is a schematic cross-sectional view for explaining the positioning of the socket with respect to the water collection tray in the indoor unit according to embodiment 1.

Fig. 8 is a perspective view for explaining the screw fixation of the socket to the water collection pan in the indoor unit according to embodiment 1.

Fig. 9 is an enlarged view of a main part for explaining the mounting relationship between the water collection tray and the socket in embodiment 2.

Fig. 10 is a perspective view showing an example of the shapes of the first fitting recess and the second fitting recess in fig. 9.

Fig. 11 is a schematic cross-sectional view for explaining the positioning of the socket with respect to the water collection tray in the indoor unit according to embodiment 2.

Fig. 12 is a schematic diagram showing an example of the configuration of the air conditioner according to embodiment 3.

Detailed Description

Embodiment mode 1

Hereinafter, an indoor unit of an air conditioner according to embodiment 1 of the present invention will be described. In the drawings, the same or corresponding components are designated by the same reference numerals and are common throughout the specification. The embodiments of the constituent elements shown throughout the specification are merely examples, and are not limited to the embodiments described in the specification. In particular, the combination of the components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, the relationship between the sizes of the respective constituent elements in the drawings may be different from the actual one.

[ Structure of indoor Unit 100 ]

Fig. 1 is a perspective view showing an example of an external appearance of an indoor unit 100 according to embodiment 1. In embodiment 1, a four-direction cassette type indoor unit 100 that is installed by being fitted into a ceiling of a room and blows air in four directions will be described. Hereinafter, the upper side in fig. 1 will be referred to as the "upper side" and the lower side will be referred to as the "lower side".

As shown in fig. 1, the indoor unit 100 has a casing 110 forming an outer contour. The casing 110 has an opening facing a lower surface of a room as a space to be air-conditioned or the like, and a substantially rectangular decorative panel 120 is attached to the opening portion in plan view. A grill 121 serving as an inlet for introducing indoor air into the indoor unit 100 is provided near the center of the decorative panel 120.

Four air outlet ports 122 for blowing out the air introduced into the indoor unit 100 are formed in the decorative panel 120. The four air outlets 122 are formed along the respective sides of the decorative panel 120. Each air outlet 122 is provided with a damper 123 that changes the air direction. Each damper 123 is driven to rotate about a shaft by a motor not shown.

Fig. 2 is a simplified view of the indoor unit 100 of fig. 1 viewed from the bottom surface side. Fig. 3 is an exploded perspective view showing an example of the structure of the indoor unit 100 of fig. 2. Fig. 2 shows a state in which the decorative panel 120 is removed to explain the internal structure of the indoor unit 100. In fig. 3, the decorative panel 120 is omitted.

As shown in fig. 2 and 3, a turbofan 130, which is a fan, is provided near the inner center of the casing 110 of the indoor unit 100. The turbo fan 130 is a centrifugal blower, and is driven by a motor (not shown) to send air flowing in from the grill 121 provided on the upstream side in the air flow direction to the side (the left-right direction in fig. 3).

The indoor heat exchanger 10 is provided around the turbo fan 130. The indoor heat exchanger 10 is supplied with air sent from the turbo fan 130, and heat is exchanged between the air and the refrigerant flowing through a heat transfer pipe, not shown, provided in the indoor heat exchanger 10.

A socket 150 is provided on the upstream side of the turbofan 130. The mouthpiece 150 rectifies air as a fluid flowing in from the grill 121 and sends the air to the turbo fan 130. The socket 150 is mounted to the sump 140.

The water collection tray 140 is molded using, for example, a synthetic resin such as foamed styrene as a material. The water collection tray 140 is disposed below the indoor heat exchanger 10, and collects condensed water generated from the indoor heat exchanger 10. The water collection tray 140 is fixed to an inner wall of the housing 110. A through hole serving as a main body suction port 141 through which air flowing in from the grill 121 passes is formed in the water collection tray 140 at a position that becomes the center portion of the lower surface of the indoor unit 100.

A socket 150 is installed around the body suction port 141 of the sump 140. In addition, the water collection tray 140 is formed with a through hole as a main body air outlet 142 through which air flowing out of the indoor heat exchanger 10 passes and is sent to the air outlet 122.

In the indoor unit 100, the air passage from the grill 121 to the air outlet 122 is formed according to the above configuration. That is, the grill 121, the socket 150 (the body suction port 141), the turbofan 130, the indoor heat exchanger 10, the body discharge port 142, and the discharge port 122 are located on the air path from the upstream side in the air flow direction.

Fig. 4 is an enlarged view of a main portion for explaining an installation relationship of the sump 140 and the socket 150 of fig. 3. As shown in fig. 4, the water collection tray 140 is provided with a plurality of fitting recesses 145 as water collection tray-side fitting means. The plurality of fitting recesses 145 are provided as recesses or through holes in a direction opposite to the socket 150 on a surface facing the socket 150. The plurality of fitting recesses 145 are provided, for example, in the vicinity of at least two of the four corners of the water collection tray 140.

The socket 150 is provided with a plurality of fitting protrusions 155 serving as socket-side fitting means. The plurality of fitting protrusions 155 are provided so as to protrude in the direction of the water collection tray 140 on the surface facing the water collection tray 140. The plurality of fitting convex portions 155 are provided at positions corresponding to the plurality of fitting concave portions 145 when the socket 150 is attached to the water collection tray 140.

In embodiment 1, the case where the fitting concave portion 145 and the fitting convex portion 155 are provided at two places is exemplified, but the present invention is not limited thereto, and the fitting concave portion 145 and the fitting convex portion 155 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 in fig. 4. Fig. 6 is a perspective view showing an example of the shape of the fitting projection 155 of fig. 4. As shown in fig. 5, each of the plurality of fitting recesses 145 is formed in a circular hole shape. As shown in fig. 6, each of the plurality of fitting protrusions 155 is formed in a cylindrical shape. The outer dimension of the fitting convex portion 155 is formed to be the same as or slightly smaller than the inner diameter of the fitting concave portion 145 provided in the water collection tray 140. That is, the outer shape of the fitting convex portion 155 is formed along the fitting concave portion 145. Thus, the fitting convex portion 155 is press-fitted into the fitting concave portion 145, and therefore, the socket 150 can be reliably fixed to the water collection tray 140.

In the example shown in fig. 5 and 6, the fitting concave portion 145 is formed in a circular hole shape, and the fitting convex portion 155 is formed in a cylindrical shape. For example, the following may be provided: the fitting concave portion 145 is formed in a polygonal hole shape, and the fitting convex portion 155 is formed in a prism shape. That is, each outer shape may be formed in a polygonal shape.

[ fixation of the socket 150 with respect to the water collection tray 140 ]

Next, a method of fixing the socket 150 to the water collection tray 140 in the indoor unit 100 according to embodiment 1 will be described. Fig. 7 is a schematic cross-sectional view for explaining the positioning of the socket 150 with respect to the water collection tray 140 in the indoor unit 100 according to embodiment 1. Fig. 8 is a perspective view for explaining the screw fixation of the socket 150 to the water collection tray 140 in the indoor unit 100 according to embodiment 1.

When the socket 150 is attached to the water collection tray 140, first, as shown in fig. 7, the plurality of fitting convex portions 155 provided in the socket 150 are fitted into the plurality of fitting concave portions 145 provided in the water collection tray 140. In this way, the socket 150 is positioned with respect to the water collection tray 140 by fitting the fitting convex portions 155 into the fitting concave portions 145. Next, in a state where socket 150 is positioned with respect to water collection tray 140, socket 150 is fixed to water collection tray 140 using a plurality of screws 160, as shown in fig. 8.

Here, in embodiment 1, the positioning is performed by the fitting concave portion 145 and the fitting convex portion 155. Therefore, the plurality of screws 160 can be tightened from an arbitrary position. That is, in the indoor unit 100 according to embodiment 1, the fastening order of the plurality of screws 160 can be set to a random order.

As described above, in the indoor unit 100 according to embodiment 1, the socket 150 is positioned with respect to the catch basin 140 only by fitting the plurality of catch basin-side fitting units to the plurality of socket-side fitting units. Therefore, the socket 150 can be easily positioned with respect to the water collection tray 140, thereby improving workability.

In the indoor unit 100 according to embodiment 1, the fitting concave portion 145 is provided as the catch basin-side fitting means, and the fitting convex portion 155 is provided as the socket-side fitting means. Thus, when the socket 150 is attached to the water collection tray 140, the fitting concave portion 145 and the fitting convex portion 155 are fitted to each other, and therefore, the socket 150 can be easily and reliably positioned.

In the indoor unit 100 according to embodiment 1, the plurality of fitting concave portions 145 are formed in a shape along the outer shape of the fitting convex portion 155. Thus, the fitting convex portion 155 is fitted into the fitting concave portion 145 by press-fitting or the like, and therefore, the socket 150 can be reliably positioned with respect to the water collection tray 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 circular hole shape. Further, the following may be configured: the plurality of fitting convex portions 155 are formed in a prism shape, and the plurality of fitting concave portions 145 are formed in a polygonal hole shape.

In the indoor unit 100 according to embodiment 1, the socket 150 is fixed to the catch basin 140 by the screw 160 in a state where the catch basin-side fitting unit is fitted to the socket-side fitting unit. This enables socket 150 to be reliably fixed to water collection tray 140 in a state where socket 150 is positioned on water collection tray 140.

Embodiment mode 2

Next, embodiment 2 of the present invention will be explained. Embodiment 2 differs from embodiment 1 in that: a part of the plurality of fitting recesses 145 is formed in an elongated hole shape. In the following description, the same reference numerals are given to the portions common to embodiment 1, and detailed description thereof is omitted.

Fig. 9 is an enlarged view of a main part for explaining the mounting relationship between the water collection tray 140 and the socket 150 in embodiment 2. As shown in fig. 9, a plurality of fitting protrusions 155 serving as socket-side fitting means are provided on the surface of the socket 150 facing the water collection tray 140, as in embodiment 1.

In embodiment 2, a first fitting recess 145a and a second fitting recess 145b are provided as a plurality of fitting recesses 145 as fitting means on the water collection pan side on the surface of the water collection pan 140 facing the socket 150. In this example, two fitting recesses 145 are provided in the water collection tray 140, one being a first fitting recess 145a and the other being a second fitting recess 145 b.

Fig. 10 is a perspective view showing an example of the shapes of the first fitting recess 145a and the second fitting recess 145b in fig. 9. As shown in fig. 10, the first fitting recess 145a is formed in a circular hole shape, as in the fitting recess 145 of embodiment 1.

The second fitting recess 145b is formed in an elongated hole shape. Here, a dimension in a direction perpendicular to a straight line connecting the first fitting concave portion 145a and the second fitting concave portion 145b, that is, a dimension α in a short side direction of the second fitting concave portion 145b in the second fitting concave portion 145b is formed to be the same as or slightly larger than an outer dimension of the fitting convex portion 155 having a cylindrical shape. This can prevent the fitting concave portion 145 from moving in the short-side direction of the second fitting concave portion 145b after the fitting convex portion 155 is press-fitted into the second fitting concave portion 145 b.

On the other hand, the dimension in the direction parallel to the straight line connecting the first fitting concave portion 145a and the second fitting concave portion 145b, that is, the dimension β in the longitudinal direction of the second fitting concave portion 145b, in the second fitting concave portion 145b is formed longer than the outer dimension of the fitting convex portion 155. This is because, when the water collection tray 140 or the socket 150 is molded, the fitting concave portions 145 and the fitting convex portions 155 can be fitted to each other even if individual differences occur in the distances between the plurality of fitting concave portions 145 or between the plurality of fitting convex portions 155 due to heat shrinkage or the like.

[ positioning of the socket 150 relative to the catch basin 140 ]

Next, the positioning of the socket 150 with respect to the water collection tray 140 in the indoor unit 100 according to embodiment 2 will be described. Fig. 11 is a schematic cross-sectional view for explaining the positioning of the socket 150 with respect to the water collection tray 140 in the indoor unit 100 according to embodiment 2.

As shown in fig. 11, when the socket 150 is attached to the water collection tray 140, the fitting convex portions 155 of the socket 150 are fitted to the plurality of fitting concave portions 145 (the first fitting concave portion 145a and the second fitting concave portion 145b) of the water collection tray 140, respectively, as in embodiment 1. At this time, the second fitting concave portion 145b is formed in an elongated hole shape elongated in a direction parallel to a straight line connecting the first fitting concave portion 145a and the second fitting concave portion 145 b. Therefore, even if an individual difference occurs in the size of the water collection tray 140 or the socket 150, since the elongated hole absorbs the individual difference in size, the positioning of the socket 150 with respect to the water collection tray 140 can be reliably performed.

In this example, the case where two fitting concave portions 145 and two fitting convex portions 155 are provided has been described, but three or more fitting concave portions 145 and three or more fitting convex portions 155 may be provided. In this case, at least one of the three or more fitting convex portions 155 is formed as the first fitting concave portion 145a, and the remaining one is formed as the second fitting concave portion 145 b. Thus, as described above, the first fitting recess 145a having the shape of the elongated hole absorbs individual differences in size due to its shape, and reliably positions the socket 150.

As described above, in the indoor unit 100 according to embodiment 2, the plurality of fitting convex portions 155 are formed in the shape of a cylinder, at least one first fitting concave portion 145a of the plurality of fitting concave portions 145 is formed in the shape of a circular hole, and the remaining second fitting concave portions 145b are formed in the shape of a long hole. At this time, the long hole shape of the second fitting concave portion 145b is formed so that the second fitting concave portion 145b is long in a direction parallel to a straight line connecting the first fitting concave portion 145a and the second fitting concave portion 145 b. Thus, even if an individual difference occurs in the size of the water collection tray 140 or the socket 150, the long holes absorb the individual difference in size, and therefore, the socket 150 can be reliably positioned with respect to the water collection tray 140.

Embodiment 3

Next, embodiment 3 of the present invention will be explained. Embodiment 3 describes an air conditioner to which the indoor unit 100 according to embodiment 1 or 2 described above is applied.

Fig. 12 is a schematic diagram showing an example of the configuration of the air conditioner 1 according to embodiment 3. As shown in fig. 12, the air conditioner 1 includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 and the outdoor unit 200 are connected by the refrigerant pipe 2 to form a refrigerant circuit.

[ constitution of air conditioner 1 ]

(outdoor machine 200)

The outdoor unit 200 is an outdoor unit that supplies heat to the indoor units 100, and includes a compressor 20, a refrigerant flow switching device 21, an outdoor heat exchanger 22, an outdoor fan 23, and an expansion valve 24. The compressor 20 sucks a low-temperature and low-pressure refrigerant, compresses the sucked refrigerant, and discharges a high-temperature and high-pressure refrigerant. The compressor 20 is constituted by, for example, an inverter compressor or the like, and the inverter compressor controls the capacity as the delivery amount per unit time by changing the operating frequency.

The refrigerant flow switching device 21 is, for example, a four-way valve, and switches between the cooling operation and the heating operation by switching the flow direction of the refrigerant. During the cooling operation, the refrigerant flow switching device 21 is switched to the state indicated by the solid line in fig. 12. During the heating operation, the refrigerant flow switching device 21 is switched to a state indicated by a broken line in fig. 12.

The outdoor heat exchanger 22 performs heat exchange between outdoor air and refrigerant. During the cooling operation, the outdoor heat exchanger 22 functions as a condenser that radiates heat of the refrigerant to the outdoor air to condense the refrigerant. During the heating operation, the outdoor heat exchanger 22 functions as an evaporator that evaporates the refrigerant and cools the outdoor air by using the heat of vaporization at that time.

The outdoor fan 23 supplies outdoor air to the outdoor heat exchanger 22. The outdoor fan 23 adjusts the amount of air blown into the outdoor heat exchanger 22 according to the rotation speed. The expansion valve 24 expands the refrigerant. The expansion valve 24 is constituted by a valve capable of controlling the opening degree of an electronic expansion valve or the like, for example.

(indoor unit 100)

The indoor unit 100 includes an indoor heat exchanger 10 and an indoor fan 11. The indoor heat exchanger 10 performs heat exchange between air and refrigerant. Thereby, heating air or cooling air to be supplied to the space to be air-conditioned is generated. The indoor heat exchanger 10 functions as an evaporator during the cooling operation, and cools the air in the space to be air-conditioned by cooling. The indoor heat exchanger 10 functions as a condenser during the heating operation, and heats the air in the space to be air-conditioned to perform heating.

The indoor air blower 11 supplies air to the indoor heat exchanger 10. In embodiment 3, a turbofan 130 is applied as the indoor fan 11. The indoor fan 11 adjusts the amount of air blown into the indoor heat exchanger 10 according to the rotation speed.

[ operation of air conditioner 1 ]

(with respect to flow of refrigerant)

The operation of the refrigerant in the air conditioner 1 having the above-described configuration will be described with reference to fig. 12.

(Cooling operation)

In the cooling operation, as shown by the solid line in fig. 12, the refrigerant flow switching device 21 switches the connection between the discharge side of the compressor 20 and the outdoor heat exchanger 22. Then, the low-temperature and low-pressure refrigerant is compressed by the compressor 20 to become a high-temperature and 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 through the refrigerant flow switching device 21. The high-temperature and high-pressure gas refrigerant flowing into the outdoor heat exchanger 22 exchanges heat with outdoor air introduced by the outdoor air-sending device 23, condenses while dissipating 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 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 through 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 flowing into the indoor heat exchanger 10 exchanges heat with the indoor air introduced by the indoor air-sending device 11, absorbs heat, evaporates, turns into a low-pressure gas refrigerant, and flows out of the indoor heat exchanger 10. 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, as shown by the broken line in fig. 12, the refrigerant flow switching device 21 switches the connection between the discharge side of the compressor 20 and the indoor unit 100 side. Then, the low-temperature and low-pressure refrigerant is compressed by the compressor 20 to become a high-temperature and high-pressure gas refrigerant, and is discharged. The high-temperature and high-pressure gas refrigerant discharged from the compressor 20 flows out of the outdoor unit 200 through the refrigerant flow switching device 21, and flows into the indoor unit 100 through 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 flowing into the indoor heat exchanger 10 exchanges heat with indoor air introduced by the indoor air-sending device 11, condenses while radiating heat, and becomes a high-pressure liquid refrigerant, which flows out of the indoor heat exchanger 10. The high-pressure liquid refrigerant flowing out of the indoor heat exchanger 10 flows out of the indoor unit 100. The high-pressure liquid refrigerant flowing out of the indoor unit 100 flows into the outdoor unit 200 through the refrigerant pipe 2.

The high-pressure liquid refrigerant flowing 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 flowing into the outdoor heat exchanger 22 exchanges heat with the outdoor air introduced by the outdoor air-sending device 23, evaporates while absorbing heat, turns into a low-pressure gas refrigerant, and flows out of the outdoor heat exchanger 22. The low-pressure gas refrigerant flowing out of the outdoor heat exchanger 22 is sucked into the compressor 20 through the refrigerant flow switching device 21.

As described above, the indoor unit 100 described in embodiment 1 or 2 is applied to the air conditioner 1 of embodiment 3. This makes it possible to obtain an air conditioner having stable unit performance.

The above description has been made of embodiments 1 to 3 of the present invention, but the present invention is not limited to the above embodiments 1 to 3 of the present invention, and various modifications and applications can be made without departing from the scope of the present invention. In embodiments 1 and 2, the description has been made in a manner that the water collection tray 140 is provided with the fitting concave portion 145 and the socket 150 is provided with the fitting convex portion 155, but the present invention is not limited to this example. For example, the following may be provided: the water collection tray 140 is provided with a fitting convex portion 155, and the socket 150 is provided with a fitting concave portion 145. Accordingly, as in embodiments 1 and 2, when the socket 150 is attached to the water collection tray 140, the fitting concave portion 145 and the fitting convex portion 155 are fitted to each other, and therefore, the socket 150 can be easily and reliably positioned.

Description of the reference numerals

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 … shell; 120 … decorative panels; 121 … a grid; 122 … outlet port; 123 … dampers; 130 … turbofan; 140 … water collection pan; 141 … main body suction inlet; 142 … body outlet; 145 … fitting recess; 145a … first fitting recess; 145b … second fitting recess; 150 … bellmouth; 155 … fitting projection; 160 … screws; 200 … outdoor unit.

Claims

1. An indoor unit, characterized by being provided with:

a housing forming an outer contour;

a fan housed in the case and configured to introduce a fluid from outside;

a heat exchanger that exchanges heat between the fluid sent from the fan and the refrigerant;

a water collection tray fixed to an inner wall of the case, collecting condensed water generated from the heat exchanger; and

a socket installed on the water collecting tray for rectifying the fluid introduced by the fan,

the water collection tray has a plurality of water collection tray side fitting units for positioning the socket,

the socket has a plurality of socket-side fitting units that are fitted to the plurality of water-collecting tray-side fitting units, respectively.

2. The indoor unit according to claim 1,

the water collecting plate side fitting means is a fitting recess provided in a surface facing the socket in a direction opposite to the socket,

the socket-side fitting means is a fitting convex portion that protrudes from a surface facing the water collection tray in a direction toward the water collection tray and is fitted into the fitting concave portion.

3. The indoor unit according to claim 1,

the water collecting plate side fitting unit is a fitting convex portion protruding from a surface facing the socket in a direction of the socket facing the socket,

the socket-side fitting means is a fitting recess provided in a surface facing the water collection tray in a direction opposite to the water collection tray, and into which the fitting projection is fitted.

4. The indoor unit according to claim 2 or 3,

the plurality of fitting recesses are formed in a shape along the outer shape of the fitting protrusion.

5. The indoor unit according to claim 4,

the plurality of fitting projections are formed in a cylindrical shape,

the plurality of fitting recesses are formed in a circular hole shape.

6. The indoor unit according to claim 4,

the plurality of fitting protrusions are formed in a prismatic shape,

the plurality of fitting recesses are formed in a polygonal hole shape.

7. The indoor unit according to claim 2 or 3,

the plurality of fitting projections are formed in a cylindrical shape,

at least one of the plurality of fitting recesses is formed in a circular hole shape, and the remaining fitting recesses are formed in an elongated hole shape.

8. The indoor unit according to claim 7,

the elongated hole shape is elongated in a direction parallel to a straight line connecting the circular hole-shaped fitting concave portion and the elongated hole-shaped fitting concave portion.

9. The indoor unit according to claim 1,

the socket is fixed to the water collection tray by screws in a state where the water collection tray side fitting unit is fitted to the socket side fitting unit.

10. An air conditioner is characterized in that,

an indoor unit according to claim 1; and

and an outdoor unit that supplies heat to the indoor units.