JP6925420B2 - Unit and air conditioner - Google Patents

Description

The present invention is, fin and tube type heat exchangers (hereinafter, referred to as "heat exchanger") in which relates unit with, and an air conditioner having the unit.

Conventional heat exchangers for air exchangers include "a heat exchanger placed in the ventilation path from the air inlet to the air outlet of the air exchanger, in the straight pipe portion of the heat transfer tube, in the axial direction. It has two first and second heat exchanger units forming a rectangular body in which a large number of strip-shaped heat radiating fins are arranged at a predetermined pitch, and one of the first heat exchanger units is the ventilation. A second tilt axis that is diagonally arranged at a predetermined angle on the bottom side of the road, and the other second heat exchanger unit intersects the first tilt axis of the first heat exchanger unit at a predetermined angle. In the heat exchanger, which is arranged above the first heat exchanger unit and in contact with each other at the tips of the first heat exchanger unit and the second heat exchanger unit, the second heat exchanger The tip of the unit is formed as a single-edged notch having a notched surface that is notched diagonally, and the end of the sharp corner of the notch is on the top tip of the first heat exchanger unit. Some were "in contact" (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-183860

Currently, many heat exchangers are subjected to surface treatment to improve the hydrophilicity of the fin surface in order to improve the drainage of condensed water on the fin surface. However, depending on the environment in which the heat exchanger is arranged, for example, oil particles generated during oil cooking or roasted meat cooking may adhere to the fins, making the fin surface water repellent and deteriorating the surface condition of the fins. There is. In addition, chemical components generated from new building materials or polluted air may dissolve in the condensed water, lowering the hydrophilic performance of the surface-treated fins and deteriorating the surface condition of the fins.

Generally, during the cooling operation or dry operation of the air conditioner, in the initial state of the indoor unit, the dew condensation water generated on the long side of the fins facing upward immediately permeates between the fins and lowers the heat exchanger. It is collected in the dew tray located in the air conditioner and discharged to the outside of the aircraft.

However, when the surface condition of the fin deteriorates, the condensed water generated and grown on the upward long side of the fin slides on the long side and moves one after another with the condensed water generated below the long side. It merges into a larger drop of water, which increases in speed and moves downward. Then, the condensed water that has moved vigorously may jump to a nearby filter or a suction portion of the indoor unit at the lowermost end of the long side facing upward of the fin. In addition, the dew condensation water that has jumped out leaks out of the machine without being collected in the dew tray. As a result, there arises a problem that the floor in the room in the vicinity where the indoor unit is installed becomes dirty.

The present invention has been made to solve the problems as described above, and its object is to provide units capable of suppressing the protrusion of water droplets, and an air conditioner having the unit.

The unit according to the present invention includes a housing, a first heat exchanger unit that is installed in the housing and whose upper end is inclined when viewed from the side in the installed state, and the first heat exchanger unit of the housing. 1 It is arranged above the heat exchanger unit, and when viewed from the side in the installed state, the lower part is located on the front side, the upper part is inclined so that it is located on the back side, and the lower end is inclined. The second heat exchanger unit, the first heat exchanger unit, and a blower fan installed on the back side of the housing with respect to the first heat exchanger unit and the second heat exchanger unit are provided, and the upper end portion and the lower portion thereof are provided. The end is inclined downward from the upstream to the downstream of the flow of air sucked by the blower fan, the corner of the upper part on the front side of the first heat exchanger unit is smaller than 90 degrees, and the lower part on the back side. the corners greater than 90 degrees, wherein the upper end of the first heat exchanger unit is rather long than the lower end of the second heat exchanger unit, the first heat exchanger unit and the second Each heat exchanger unit is provided with heat dissipation fins, and the heat radiation fins of the first heat exchanger unit and the heat radiation fins of the second heat exchanger unit are separated from each other, and the heat exchanger unit of the first heat exchanger unit is described. A gap is provided between the upper end and the lower end of the second heat exchanger unit .

The air conditioner according to the present invention includes the above-mentioned unit and a heat source side unit, and has a refrigerant circuit formed by connecting element devices mounted on the respective units by piping. ..

According to the unit according to the present invention, since the upper end of the first heat exchanger unit is inclined downward from the upstream to the downstream of the air flow, the second heat exchanger unit to the first heat exchanger unit The water droplets that have flowed down will flow in the direction of gravity on the upper end portion, and the water droplets can be suppressed from popping out.

It is a schematic block diagram which shows an example of the refrigerant circuit structure of the air conditioner which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows roughly the structure which looked at the central part of the 1st unit which concerns on Embodiment 1 of this invention from the side. It is a side view which shows roughly the state which the heat exchanger mounted on the 1st unit which concerns on Embodiment 1 of this invention are seen from the side. FIG. 3 is an enlarged side view showing a part of the heat exchanger shown in FIG. 3 in an enlarged manner. It is explanatory drawing of the conventional example which typically showed an example of the flow of the water drop in the state where the heat radiation fin of the 2nd heat exchanger unit is not made water repellent. It is explanatory drawing of the conventional example which typically showed an example of the flow of the water drop in the state which made the heat radiation fin of the 2nd heat exchanger unit water repellent. It is explanatory drawing of the conventional example which typically shown another example of the flow of the water drop in the state which made the heat radiation fin of the 2nd heat exchanger unit water repellent. It is the figure which showed the angle φ, the angle θ, and the movement of a water drop in a table. FIG. 5 is an enlarged side view showing an enlarged state of a part of a modified example of the heat exchanger mounted on the first unit according to the first embodiment of the present invention as viewed from the side surface. FIG. 5 is an enlarged side view showing an enlarged state of a part of a modified example of the heat exchanger mounted on the first unit according to the first embodiment of the present invention as viewed from the side surface. FIG. 5 is an enlarged side view showing an enlarged state of a part of a modified example of the heat exchanger mounted on the first unit according to the first embodiment of the present invention as viewed from the side surface. FIG. 5 is an enlarged side view showing an enlarged state of a part of a modified example of the heat exchanger mounted on the first unit according to the first embodiment of the present invention as viewed from the side surface. It is a schematic diagram for demonstrating a part of the manufacturing method of the heat exchanger which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the heat exchanger formed by the manufacturing method of FIG. It is a graph which shows the relationship between the angle α, the angle β, and BG / CD in the heat exchanger formed by the manufacturing method of FIG. It is a graph which shows the area X shown in FIG. 15 enlarged. It is a schematic diagram for demonstrating the modification of the heat exchanger formed by the method of manufacturing the heat exchanger which concerns on Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings including FIG. 1, the relationship between the sizes of the constituent members may differ from the actual one. Further, in the following drawings including FIG. 1, those having the same reference numerals are the same or equivalent thereof, and this shall be common to the entire text of the specification. Furthermore, the forms of the components represented in the full text of the specification are merely examples, and are not limited to these descriptions.

Embodiment 1.
FIG. 1 is a schematic configuration diagram showing an example of a refrigerant circuit configuration of the air conditioner 100 according to the first embodiment of the present invention. In FIG. 1, the flow of the refrigerant during the cooling operation is indicated by a solid line arrow, and the flow of the refrigerant during the heating operation is indicated by a broken line arrow.

<Structure of air conditioner 100>
As shown in FIG. 1, the air conditioner 100 includes a first unit 100A and a second unit 100B.
The first unit 100A corresponds to the "unit" of the present invention.

The first unit 100A is used as an indoor unit (user unit) and includes a heat exchanger 30 and a blower fan 20.
The second unit 100B is used as an outdoor unit (heat source side unit) and includes a heat source side heat exchanger 53, a heat source side blower fan 55, a compressor 51, a four-way switching valve 52, and an expansion valve 54. There is.
The first unit 100A and the second unit 100B are connected to each other by a refrigerant pipe 58 including a gas side connecting pipe 56 and a liquid side connecting pipe 57, thereby forming a refrigerant circuit 70.

In the air conditioner 100, the cooling operation and the heating operation can be switched by switching the path of the four-way switching valve 52. In the case of the path of the four-way switching valve 52 shown by the solid line in FIG. 1, the air conditioner 100 performs the cooling operation. On the other hand, in the case of the path of the four-way switching valve 52 shown by the broken line in FIG. 1, the air conditioner 100 performs the heating operation.

(1st unit 100A)
The first unit 100A is installed in a space for supplying cold or hot heat to the air-conditioned space, and has a function of cooling or heating the air-conditioned space by the cold or hot supplied from the second unit 100B. The space for supplying cold heat or hot heat to the air-conditioned space includes an air-conditioned space such as indoors, or another space connected to the air-conditioned space via a duct or the like.

The heat exchanger 30 functions as a condenser during the heating operation and as an evaporator during the cooling operation. The heat exchanger 30 is composed of a fin and tube type heat exchanger.
The blower fan 20 supplies air, which is a heat exchange fluid, to the heat exchanger 30. The blower fan 20 can be composed of a propeller fan or a cross-flow fan having a plurality of blades.

(2nd unit 100B)
The second unit 100B is installed in a space (outdoor) separate from the air-conditioned space, and has a function of supplying cold heat or hot heat to the first unit 100A.

The heat source side heat exchanger 53 functions as an evaporator during the heating operation and as a condenser during the cooling operation.
The heat source side blower fan 55 supplies air, which is a heat exchange fluid, to the heat source side heat exchanger 53. The heat source side blower fan 55 can be composed of a propeller fan having a plurality of blades.

The compressor 51 compresses and discharges the refrigerant. The compressor 51 can be composed of a rotary compressor, a scroll compressor, or the like. When the heat source side heat exchanger 53 functions as a condenser, the refrigerant discharged from the compressor 51 is sent to the heat source side heat exchanger 53 through the refrigerant pipe 58. When the heat source side heat exchanger 53 functions as an evaporator, the refrigerant discharged from the compressor 51 passes through the refrigerant pipe 58, passes through the first unit 100A, and then is sent to the heat source side heat exchanger 53.

The four-way switching valve 52 is provided on the discharge side of the compressor 51 and switches the flow of the refrigerant between the heating operation and the cooling operation.
When the refrigerant is circulated in one direction, the four-way switching valve 52 is not an indispensable configuration. Further, as a substitute for the four-way switching valve 52, a combination of a two-way valve or a three-way valve may be used.

The expansion valve 54 expands the refrigerant that has passed through the heat exchanger 30 or the heat source side heat exchanger 53 to reduce the pressure. The expansion valve 54 may be composed of an electric expansion valve or the like whose flow rate of the refrigerant can be adjusted.
The expansion valve 54 may be arranged in the first unit 100A instead of the second unit 100B.

In the refrigerant circuit 70 included in the air conditioner 100, the compressor 51, the heat exchanger 30, the expansion valve 54, and the heat source side heat exchanger 53, which are elemental devices mounted on the respective units, are provided by the refrigerant pipe 58. It is connected and formed.

<Operation of air conditioner 100>
Next, the operation of the air conditioner 100 will be described together with the flow of the refrigerant. Here, the operation of the air conditioner 100 will be described by taking as an example the case where the heat exchange fluid that exchanges heat with the refrigerant in the heat exchanger 30 and the heat source side heat exchanger 53 is air.

First, the cooling operation executed by the air conditioner 100 will be described.
By driving the compressor 51, the refrigerant in a high-temperature and high-pressure gas state is discharged from the compressor 51. Hereinafter, the refrigerant flows according to the solid arrow. The high-temperature and high-pressure gas refrigerant (single-phase) discharged from the compressor 51 flows into the heat source-side heat exchanger 53 that functions as a condenser via the four-way switching valve 52. In the heat source side heat exchanger 53, heat exchange is performed between the high temperature and high pressure gas refrigerant that has flowed in and the air supplied by the heat source side blower fan 55, and the high temperature and high pressure gas refrigerant is condensed and has a high pressure. It becomes a liquid refrigerant (single phase).

The high-pressure liquid refrigerant sent out from the heat source side heat exchanger 53 becomes a two-phase state refrigerant of the low-pressure gas refrigerant and the liquid refrigerant by the expansion valve 54. The two-phase refrigerant flows into the heat exchanger 30 that functions as an evaporator. In the heat exchanger 30, heat exchange is performed between the flowing two-phase state refrigerant and the air supplied by the blower fan 20, and the liquid refrigerant of the two-phase state refrigerant evaporates to a low-pressure gas. Becomes a refrigerant (single phase). This heat exchange cools the room. The low-pressure gas refrigerant sent out from the heat exchanger 30 flows into the compressor 51 via the four-way switching valve 52, is compressed, becomes a high-temperature and high-pressure gas refrigerant, and is discharged from the compressor 51 again. Hereinafter, this cycle is repeated.

Next, the heating operation executed by the air conditioner 100 will be described.
By driving the compressor 51, the refrigerant in a high-temperature and high-pressure gas state is discharged from the compressor 51. Hereinafter, the refrigerant flows according to the broken line arrow. The high-temperature and high-pressure gas refrigerant (single-phase) discharged from the compressor 51 flows into the heat exchanger 30 that functions as a condenser via the four-way switching valve 52. In the heat exchanger 30, heat exchange is performed between the high-temperature and high-pressure gas refrigerant that has flowed in and the air supplied by the blower fan 20, and the high-temperature and high-pressure gas refrigerant condenses and is a high-pressure liquid refrigerant (simple). Phase). This heat exchange heats the room.

The high-pressure liquid refrigerant sent out from the heat exchanger 30 becomes a two-phase state refrigerant of the low-pressure gas refrigerant and the liquid refrigerant by the expansion valve 54. The two-phase refrigerant flows into the heat source side heat exchanger 53 that functions as an evaporator. In the heat source side heat exchanger 53, heat exchange is performed between the flowing two-phase state refrigerant and the air supplied by the heat source side blower fan 55, and the liquid refrigerant of the two-phase state refrigerant evaporates. Becomes a low-pressure gas refrigerant (single phase). The low-pressure gas refrigerant sent out from the heat source side heat exchanger 53 flows into the compressor 51 via the four-way switching valve 52, is compressed, becomes a high-temperature and high-pressure gas refrigerant, and is discharged from the compressor 51 again. Hereinafter, this cycle is repeated.

<Details of the unit (first unit) according to the first embodiment of the present invention>
Next, the first unit 100A according to the first embodiment of the present invention will be described in detail. FIG. 2 is a schematic view schematically showing a configuration in which the central portion of the first unit 100A is viewed from the side surface. The first unit 100A will be specifically described with reference to FIG.

(Structure of 1st unit 100A)
As shown in FIG. 2, the first unit 100A includes a housing 10, a blower fan 20, a casing portion 15, a heat exchanger 30, a filter 42, left and right flaps 13, an upper flap 16, and a lower flap. A 17, front grill 12, and a nozzle 18 are provided. Hereinafter, each component will be described individually.

The housing 10 is formed in a horizontally long rectangular parallelepiped shape in the installed state. The housing 10 constitutes the outer shell of the first unit 100A, and an opening functioning as a suction port 11 is formed on the top surface, and an opening functioning as an air outlet 14 is formed on the lower surface and the front surface. ing. The suction port 11 may be formed on the upper front surface of the housing 10 or on both the top surface and the upper front surface. Further, the air outlet 14 may be formed on the lower surface or the front surface. The housing 10 is equipped with a blower fan 20, a casing portion 15, a heat exchanger 30, a filter 42, a drain pan 41, and an electric component box (not shown).

The blower fan 20 is installed inside the housing 10 to suck air and blow out the sucked air. The blower fan 20 is installed in the air passage 40 from the suction port 11 to the air outlet 14 at a substantially central portion when the housing 10 is viewed from the side. By driving the blower fan 20, air is sucked into the housing 10 through the suction port 11, and after this air is supplied to the heat exchanger 30, the air outlet 14 passes through the blower fan 20. It will be blown out of the body 10. The blower fan 20 can be composed of a cross flow fan, a propeller fan, or the like.

The casing portion 15 is installed inside the housing 10 and guides the air blown by the blower fan 20 to the air outlet 14, and determines the blowing direction of the air blown from the blower fan 20. The casing portion 15 is configured to have a curved side view so as to extend from the back surface side of the blower fan 20 to the air outlet 14.
In addition, a wind having a high wind speed may collide with the casing portion 15 and water droplets flying through the heat exchanger 30 may adhere to the casing portion 15.

The heat exchanger 30 generates conditioned air by exchanging heat with the refrigerant flowing through the refrigerant circuit 70 from the air sucked by the blower fan 20. Specifically, the heat exchanger 30 is arranged between the suction port 11 and the blower fan 20 to harmonize the air sucked from the suction port 11. The heat exchanger 30 includes a heat transfer tube 50 and heat radiation fins 60 through which the heat transfer tube 50 is inserted. The air harmonized by the heat exchanger 30 includes cooling air during the cooling operation, heated air during the heating operation, and dehumidified air during the dehumidifying operation. The arrangement of the heat exchanger 30 will be described in detail later.

The filter 42 is installed inside the housing 10 on the upstream side of the air flow of the heat exchanger 30, and captures dust contained in the air sucked by the blower fan 20. The filter 42 is detachably installed.
The filter 42 is not an essential configuration.

The left and right flaps 13 change the wind direction of the air blown out from the air outlet 14 in the left-right direction. The left and right flaps 13 are composed of flat wind direction plates having various outer shell shapes formed of resin, and a plurality of the left and right flaps 13 are installed in the width direction of the housing 10 to serve to deliver the air blown out from the air outlet 14 in the left-right direction.

The upper flap 16 and the lower flap 17 change the wind direction of the air blown out from the air outlet 14 in the vertical direction. The upper flap 16 and the lower flap 17 are composed of flat wind direction plates having various outer shapes made of resin, are installed so as to block the air outlet 14 when stopped, and blow out air from the air outlet 14 during operation. It has the role of delivering in the vertical direction.
Although the case where the upper and lower wind directions are changed by two flaps is shown as an example, the number of flaps may be one or three or more. Further, the outlet 14 does not necessarily have to be closed when stopped.

The nozzle 18 is located below the heat exchanger 30 and is provided from the front grill 12 toward the blower fan 20. The upper surface of the nozzle 18 (on the heat exchanger 30 side) functions as a drain pan 41.
The drain pan 41 is provided below the heat exchanger 30 and stores water (condensed water, condensed water, etc., the same applies hereinafter) generated in the heat exchanger 30.
The electrical component box stores electrical components such as a control board.
The front grill 12 is attached to the front surface of the housing 10 so as to be openable and closable and detachable, and serves as a design surface of the first unit 100A.

In FIG. 2, the heat exchanger 30 is arranged so as to surround the top surface side and the front surface side of the blower fan 20, but the arrangement form of the heat exchanger 30 is limited to the arrangement form shown in FIG. is not it.

<Details of heat exchanger>
FIG. 3 is a side view schematically showing a state in which the heat exchanger mounted on the first unit according to the first embodiment of the present invention is viewed from the side. FIG. 4 is an enlarged side view showing a part of the heat exchanger shown in FIG. 3 in an enlarged manner. The configuration of the heat exchanger 30 will be described in detail with reference to FIGS. 3 and 4.
In FIG. 4, the flow of water is represented by a thick arrow. Further, in FIG. 4, the angle formed by the upper end portion 31a with respect to the horizontal direction, that is, the angle formed by the upper end portion 31a and the horizontal line is shown as an angle φ. Further, in FIG. 4, the angle formed by the lower end portion 32a with respect to the horizontal direction, that is, the angle formed by the lower end portion 32a and the horizontal line is shown as an angle θ.

As shown in FIG. 3, the heat exchanger 30 includes a first heat exchanger unit 31 installed below the front surface side of the housing 10 and a second heat exchanger unit 32 installed above the front surface side of the housing 10. , And a third heat exchanger unit 33 installed above the back side of the housing 10.
Further, since the heat exchanger 30 is a fin and tube type heat exchanger, a plurality of the first heat exchanger unit 31, the second heat exchanger unit 32, and the third heat exchanger unit 33 are all present. It includes a heat transfer tube 50 and a plurality of heat radiation fins 60 through which the heat transfer tube 50 is inserted.

The heat transfer tube 50 is configured as a circular tube. A plurality of heat radiation fins 60 are joined to the heat transfer tube 50.
The heat radiation fin 60 is made of a thin plate made of aluminum. The heat transfer tube 50 and the heat radiation fin 60 are joined by brazing.
Although the case where the heat transfer tube 50 is a circular tube is shown here as an example, a flat tube having a flat cross section may be used as the heat transfer tube 50.

In the first heat exchanger unit 31, the heat radiation fins 60 have a trapezoidal shape when the state of being installed in the housing 10 is viewed from the side. At this time, the short side portion located above the first heat exchanger unit 31 is referred to as an upper end portion 31a, and the long side portion located on the front surface side is referred to as a first front surface side end portion 31e. Further, the corner portion located on the upper front side of the first heat exchanger unit 31 is referred to as a corner portion A, and the corner portion located on the upper portion on the back surface side of the first heat exchanger unit 31 is referred to as a corner portion B.
The heat radiating fins 60 of the first heat exchanger unit 31 do not have to have a strict trapezoidal shape when viewed from the side.

In the second heat exchanger unit 32, the heat radiation fins 60 have a rectangular shape when the state of being installed in the housing 10 is viewed from the side. The second heat exchanger unit 32 is arranged above the first heat exchanger unit 31 of the housing 10, and when viewed from the side in the installed state, the lower portion is located on the front side and the upper portion is on the back side. It is tilted so that it is located. At this time, the short side portion located below the second heat exchanger unit 32 is referred to as a lower end portion 32a, and the long side portion located on the front surface side is referred to as a second front surface side end portion 32e. Further, the corner portion located at the lower front side of the second heat exchanger unit 32 is referred to as a corner portion C, and the corner portion located at the lower portion on the back surface side of the second heat exchanger unit 32 is referred to as a corner portion D.
The heat radiating fins 60 of the second heat exchanger unit 32 do not have to have a strict rectangular shape when viewed from the side.

In the third heat exchanger unit 33, the heat radiation fins 60 have a rectangular shape when viewed from the side in a state where the third heat exchanger unit 33 is installed in the housing 10.
The heat radiating fins 60 of the second heat exchanger unit 32 and the heat radiating fins 60 of the third heat exchanger unit 33 do not have to have a strict rectangular shape when viewed from the side.

Then, the first heat exchanger unit 31 and the second heat exchanger unit 31 and the second heat exchanger unit 32 so that the extension line of the second front side end portion 32e of the second heat exchanger unit 32 intersects the upper end portion 31a of the first heat exchanger unit 31. The heat exchanger unit 32 is arranged.
In addition, as shown in FIG. 4, when the first heat exchanger unit 31 is installed in the housing 10, the upper end portion 31a is inclined at an angle φ with respect to the horizontal direction. The upper end portion 31a is inclined so as to descend from the front side to the back side. That is, the upper end portion 31a is inclined downward from the upstream to the downstream of the air flow sucked by the blower fan 20.

Next, the flow of water droplets from the second heat exchanger unit to the first heat exchanger unit will be described based on a conventional example. FIG. 5 is an explanatory diagram of a conventional example schematically showing an example of the flow of water droplets in a state where the heat radiation fins of the second heat exchanger unit are not made water repellent. FIG. 6 is an explanatory diagram of a conventional example schematically showing an example of the flow of water droplets in a state where the heat radiation fins of the second heat exchanger unit are made water repellent. FIG. 7 is an explanatory diagram of a conventional example schematically showing another example of the flow of water droplets in a state where the heat radiation fins of the second heat exchanger unit are made water repellent.

In FIGS. 5 to 7, the heat transfer tube is shown as the heat transfer tube 50X. Further, the heat radiation fins are shown as heat radiation fins 60X. Further, the first heat exchanger unit is shown as the first heat exchanger unit 31X. Further, the second heat exchanger unit is shown as the second heat exchanger unit 32X. Further, the upper end portion is shown as an upper end portion 31aX. Further, the lower end portion is shown as a lower end portion 32aX. Further, the second front surface side end portion is shown as a second front surface side end portion 32eX. Further, the heat radiating fins 60X of the first heat exchanger unit 31X have a rectangular shape when viewed from the side. Further, in FIGS. 5 to 7, the flow of water is represented by a thick arrow.

In FIG. 5, the heat radiation fins 60X of the second heat exchanger unit 32X are not made water repellent. In this case, the water generated in the second heat exchanger unit 32X becomes water droplets, flows in the direction of gravity, permeates between the heat radiation fins 60X, and does not jump out of the housing. There is.

On the other hand, in FIG. 6, the heat radiation fins 60X of the second heat exchanger unit 32X are made water repellent. In this case, the water generated in the second heat exchanger unit 32X becomes water droplets, flows downward along the second front side end portion 32eX of the second heat exchanger unit 32X, and jumps out of the housing as it is. It ends up.

Alternatively, as shown in FIG. 7, the water generated in the second heat exchanger unit 32X becomes water droplets and flows downward along the second front side end portion 32eX of the second heat exchanger unit 32X. It falls on the upper end 31aX of the first heat exchanger unit 31X. The water droplets that have fallen on the upper end 31aX will jump out of the housing as they are.

However, in any of the cases shown in FIGS. 6 and 7, some water droplets permeated between the heat radiation fins 60X of the first heat exchanger unit 31X, and the popping out of the water droplets could be reduced. ..

In FIG. 7, the first heat exchanger unit 31X and the second heat exchanger unit 32X are arranged so that the extension line of the second front end 32eX intersects the upper end 31aX parallel to the horizontal direction. The state of being arranged is shown as an example. That is, the first heat exchanger unit 31X and the first heat exchanger unit 31X so that the portion located on the frontmost side of the second front side end portion 32eX is located on the back side side of the portion located on the frontmost side of the upper end portion 31aX. Two heat exchanger units 32X are arranged.

On the other hand, in the heat exchanger 30, as shown in FIG. 4, the extension line of the second front side end portion 32e of the second heat exchanger unit 32 is the first that is inclined at an angle φ with respect to the horizontal direction. It intersects the upper end 31a of the heat exchanger unit 31.

By doing so, the water generated in the second heat exchanger unit 32 becomes water droplets and flows downward along the second front side end portion 32e of the second heat exchanger unit 32, and then the first heat. It falls onto the upper end 31a of the exchanger unit 31. Then, it flows downward along the upper end 31a of the inclined first heat exchanger unit 31. Further, a part of the water droplets permeates between the heat radiation fins 60 of the first heat exchanger unit 31 and flows in the direction of gravity. That is, the water droplets that have flowed from the second heat exchanger unit 32 to the first heat exchanger unit 31 can flow to the inner side of the housing 10, and the water droplets can be suppressed from jumping out of the housing 10.

FIG. 8 is a table showing the angle φ, the angle θ, and the movement of the water droplet. An angle φ, an angle θ, and how the water droplets move according to each angle will be described with reference to FIG. The angle θ is constant at 45 degrees.

When the angle φ was 0 degrees, the water droplets jumped out of the housing 10.
When the angle φ was 5 degrees, the water droplets did not jump out of the housing 10 but penetrated between the heat radiating fins 60 after colliding with the upper end portion 31a.
When the angle φ was 10 degrees, the water droplets did not jump out of the housing 10 but penetrated between the heat radiating fins 60 after colliding with the upper end portion 31a.
From the above, it was found that by setting the angle φ to 5 degrees or more and the angle θ or less, water droplets permeate between the heat radiation fins 60 without jumping out of the housing 10 and dew splash can be prevented.

As described above, by crossing the extension line of the second front surface side end portion 32e with the upper end portion 31a and inclining the upper end portion 31a, the water droplets that have moved from the second front surface side end portion 32e are discharged from the housing 10. It is possible to suppress the movement toward the outside of. Therefore, according to the heat exchanger 30, dew splash suppression can be realized, and the certainty of collecting water droplets in the drain pan 41 is improved.
The angle θ may be such that the lower end portion 32a does not come into contact with the upper end portion 31a.

<Modification example of heat exchanger 30>
9 to 12 are enlarged side views showing a part of a modified example of the heat exchanger mounted on the first unit according to the first embodiment of the present invention as viewed from the side. A configuration of a modified example of the heat exchanger 30 will be described with reference to FIGS. 9 to 12.

In FIG. 9, when the first heat exchanger unit 31 installed in the housing 10 is viewed from the side, the upper end portion 31a of the first heat exchanger unit 31 is curved so as to be convex downward. Is shown. In this way, the upper end 31a of the first heat exchanger unit 31 may have a curved shape. By forming the upper end 31a of the first heat exchanger unit 31 into a curved shape, water droplets are less likely to splash and dew is less likely to splash.

In FIG. 10, the heat radiating fins 60 of the second heat exchanger unit 32 have a trapezoidal shape when the second heat exchanger unit 32 installed in the housing 10 is viewed from the side. That is, the angle Ψ formed by the lower end 32a of the corner C and the second front end 32e is larger than 90 degrees, the angle of the corner D is smaller than 90 degrees, and the lower end 32a is tilted. ing. In this way, the lower end portion 32a of the second heat exchanger unit 32 may have an inclined shape. By forming the lower end 32a of the second heat exchanger unit 32 into an inclined shape, water droplets are less likely to splash and dew is less likely to splash. In addition, water droplets are likely to fall from the second heat exchanger unit 32 to the first heat exchanger unit 31.

Further, if the shape is shown in FIG. 10, the corner portion C is located on the back side of the housing 10 as compared with the shape shown in FIG. Therefore, the probability that water droplets from the second heat exchanger unit 32 will fall beyond the corner A of the first heat exchanger unit 31 will decrease, and the effect of easily falling onto the first heat exchanger unit 31 will be reduced. Can also be obtained.

FIG. 11 shows a state in which the chamfered portion A1 is provided at the corner portion A of the first heat exchanger unit 31 in a state where the first heat exchanger unit 31 installed in the housing 10 is viewed from the side. Shown. In this way, the front side corner portion of the upper end portion 31a of the first heat exchanger unit 31 may be cut diagonally. With such a shape, water droplets are less likely to splash and dew is less likely to splash, and the upper end 31a of the first heat exchanger unit 31 does not protrude, so that the size of the housing 10 can be suppressed. However, the chamfered portion A1 is on the front side from the position where it intersects the extension line of the second front side end portion 32e.

In particular, if the inclined side formed by the chamfered portion A1 is substantially parallel to the second front end side end portion 32e, the first heat exchanger unit 31 does not protrude and the second heat exchanger unit 32 does not protrude. It is also possible to maintain the ease with which water droplets can fall from the first heat exchanger unit 31.

FIG. 12 shows a state in which the chamfered portion C1 is provided at the corner portion C of the second heat exchanger unit 32 in a state where the second heat exchanger unit 32 installed in the housing 10 is viewed from the side. Shown. In this way, the front side corner portion of the lower end portion 32a of the second heat exchanger unit 32 may be cut diagonally. With such a shape, water droplets moving on the lower end portion 32a are likely to collide with the upper end portion 31a, and dew flying can be suppressed with a higher probability.

As described above, in the unit according to the first embodiment of the present invention, the upper end portion 31a is inclined downward from the upstream to the downstream of the air flow sucked by the blower fan 20.
Therefore, according to the unit according to the first embodiment of the present invention, the water droplets that have flowed down from the second heat exchanger unit 32 to the first heat exchanger unit 31 flow downward along the upper end portion 31a. , It is possible to suppress the popping out of water droplets.

In the unit according to the first embodiment of the present invention, the extension line of the second front side end 32e, which is the front end of the second heat exchanger unit 32, intersects the upper end 31a in a side view. It is a thing.
Therefore, according to the unit according to the first embodiment of the present invention, the water droplets that have flowed down from the second heat exchanger unit 32 to the first heat exchanger unit 31 can be easily guided to the upper end portion 31a, and the water droplets pop out. Can be further suppressed.

In the unit according to the first embodiment of the present invention, when the angle formed by the upper end portion 31a and the horizontal line is an angle φ and the angle formed by the lower end portion 32a and the horizontal line is an angle θ, the angle φ is 5 degrees. It is equal to or greater than and equal to or less than the angle θ.
Therefore, according to the unit according to the first embodiment of the present invention, the water droplets that have flowed down from the second heat exchanger unit 32 to the first heat exchanger unit 31 can be easily guided to the upper end portion 31a, and the water droplets pop out. Can be further suppressed.

In the unit according to the first embodiment of the present invention, the upper end 31a is convex downward when the first heat exchanger unit 31 and the second heat exchanger unit 32 are installed in the housing 10 and viewed from the side. It is curved so as to be.
Therefore, according to the unit according to the first embodiment of the present invention, since the upper end portion 31a is curved, water droplets are less likely to splash and dew is less likely to splash.

In the unit according to the first embodiment of the present invention, the angle of the corner portion C is configured to be larger than 90 degrees, the angle of the corner portion D is configured to be smaller than 90 degrees, and the lower end of the second heat exchanger unit 32. The portion 32a is tilted.
Therefore, according to the unit according to the first embodiment of the present invention, the water droplets do not jump out of the housing 10, and the water droplets are more likely to fall from the second heat exchanger unit 32 to the first heat exchanger unit 31. ..

In the unit according to the first embodiment of the present invention, the first heat exchanger unit 31 and the second heat exchanger unit 32 are installed in the housing 10, and the front surface of the first heat exchanger unit 31 is viewed from the side. A chamfered portion A1 is provided at a corner portion A on the upper side.
Therefore, according to the unit according to the first embodiment of the present invention, since the chamfered portion A1 is provided at the corner portion A, the upper end portion 31a of the first heat exchanger unit 31 does not protrude, and the housing 10 has a large size. Chamfering can be suppressed.

In the unit according to the first embodiment of the present invention, the first heat exchanger unit 31 and the second heat exchanger unit 32 are installed in the housing 10, and the front surface of the second heat exchanger unit 32 is viewed from the side. A chamfered portion C1 is provided at a corner portion C on the lower side.
Therefore, according to the unit according to the first embodiment of the present invention, since the chamfered portion C1 is provided at the corner portion C, it becomes easy to guide water droplets to the upper end portion 31a of the first heat exchanger unit 31.

The air conditioner according to the first embodiment of the present invention includes the above-mentioned unit, the first unit 100A, and the heat source side unit, the second unit 100B, and includes element devices mounted on the respective units. It has a refrigerant circuit 70 formed by connecting pipes.
Therefore, according to the air conditioner according to the first embodiment of the present invention, since the above unit is provided, it is possible to suppress the ejection of water droplets from the unit, and the comfort is improved.

Embodiment 2.
FIG. 13 is a schematic view for explaining a part of the method for manufacturing the heat exchanger according to the second embodiment of the present invention. FIG. 14 is a schematic view for explaining the heat exchanger formed by the manufacturing method of FIG. FIG. 15 is a graph showing the relationship between the angles α, the angles β, and the BG / CD in the heat exchanger formed by the manufacturing method of FIG. FIG. 16 is an enlarged graph showing the region X shown in FIG. A method for manufacturing the heat exchanger according to the second embodiment of the present invention will be described with reference to FIGS. 13 to 16. In the second embodiment, the differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As described in the first embodiment, the first heat exchanger unit 31 and the second heat exchanger unit 32 have a plurality of heat transfer tubes 50 and a plurality of heat radiation fins 60 through which the heat transfer tubes 50 are inserted. ing. Here, the heat transfer tube 50 constituting the first heat exchanger unit 31 is referred to as a first heat transfer tube 50a, and the heat radiating fin 60 constituting the first heat exchanger unit 31 is referred to as a first heat radiating fin 60a. .. Further, the heat transfer tube 50 constituting the second heat exchanger unit 32 is referred to as a second heat transfer tube 50b, and the heat radiating fin 60 constituting the second heat exchanger unit 32 is referred to as a second heat radiating fin 60b.

FIG. 13 shows a state in which one heat exchanger is divided into two and the first heat exchanger unit 31 and the second heat exchanger unit 32 are formed with the divided portion as a boundary. Specifically, the plate-shaped member to be the heat radiating fin 60 is cut into two, one of which is divided into the first heat radiating fin 60a of the first heat exchanger unit 31, and the other of which is divided is the second heat exchanger unit. The second heat dissipation fin 60b of 32 is used. Specifically, the angles of both the corners A and B of the cut portion serving as the first heat radiation fin 60a are different, and the angles of both the corners C and D of the cut portion serving as the second heat radiation fin 60b. The plate-shaped member is cut so that

Then, either the first heat radiating fin 60a or the second heat radiating fin 60b is inverted, and the first heat exchanger unit 31 and the second heat exchanger unit 32 are arranged. Further, the first heat exchanger unit 31 is arranged so that the upper end portion 31a is inclined downward from the upstream to the downstream of the air flow when viewed from the side while being installed in the housing 10. Further, the second heat exchanger unit 32 is arranged adjacent to the first heat exchanger unit 31 with the cut portion as a boundary. When the first heat exchanger unit 31 and the second heat exchanger unit 32 are formed in this way, the amount of waste when forming the heat exchanger 30 can be reduced, and the productivity is improved.

The length of the upper end 31a of the first heat exchanger unit 31 and the length of the lower end 32a of the second heat exchanger unit 32 formed in this way are the same. Further, the angle α of the corner portion A which is the acute angle of the first heat exchanger unit 31 and the angle α of the corner portion D which is the acute angle of the second heat exchanger unit 32 are the same. Further, the angle of the corner portion B which is the obtuse angle of the first heat exchanger unit 31 and the angle of the corner portion C which is the obtuse angle of the second heat exchanger unit 32 are the same.

FIG. 14 shows a state in which a part of the heat exchanger formed by the manufacturing method of FIG. 13 is viewed from the side. In FIG. 14, the long side portion on the opposite side of the first front surface side end portion 31e is the first back surface side end portion 31d, and the long side portion on the opposite side of the second front surface side end portion 32e is the second back surface side end portion 32d. It is illustrated as. In FIG. 14, the front-rear vertical relationship of the second heat exchanger unit 32 does not necessarily match the front-rear vertical relationship described in the first embodiment, but the name used in the first embodiment is used as it is. And.

Also in the second embodiment, the corner portion formed by the first front surface side end portion 31e and the upper end portion 31a of the first heat exchanger unit 31 is referred to as a corner portion A. Further, the corner portion formed by the first back surface side end portion 31d and the upper end portion 31a of the first heat exchanger unit 31 is referred to as a corner portion B. Further, the corner portion formed by the second front side end portion 32e and the lower end portion 32a of the second heat exchanger unit 32 is referred to as a corner portion C. Further, the corner portion formed by the second back surface side end portion 32d and the lower end portion 32a of the second heat exchanger unit 32 is referred to as a corner portion D.

Further, a perpendicular line L1 is drawn from the corner portion C to the second back surface side end portion 32d, and the intersection of the perpendicular line L1 and the second back surface side end portion 32d is defined as a point E.
Further, a perpendicular line L2 is drawn from the corner portion B to the first front surface side end portion 31e, and the intersection of the perpendicular line L2 and the first front surface side end portion 31e is set as a point F.
Then, the distance between the apex of the corner portion A and the apex of the corner portion B is represented as AB, and the distance between the apex of the corner portion C and the apex of the corner portion D is represented as a CD.
Further, it is assumed that the distance between the apex of the corner portion D and the point E is represented as DE.

Further, the angle formed by the CD and DE, that is, the angle formed by the corner portion D is defined as the angle α, and the angle formed by the CD and AB is defined as the angle β.
The intersection of the extension line of the second front side end portion 32e of the second heat exchanger unit 32 and the upper end portion 31a of the first heat exchanger unit 31 is defined as a point G.
It is assumed that the distance between the apex of the corner portion B and the point G is expressed as BG.

Even if water droplets flowing in the direction of gravity from the second heat exchanger unit 32 try to scatter away from the second heat exchanger unit 32, if they collide with the first heat exchanger unit 31, the first heat exchanger unit 31 It flows in the direction of gravity along the line and can suppress dew flying. To do this, BG <CD needs to be.

This can be expressed by an equation as follows.
BG = L1 · sin (α) <CD = L1 · sin (π-α-β)
Therefore, it is desirable that BG / CD = sin (α) / sin (π-α-β) <1. In particular, if the angle α ≦ 45 degrees, it does not depend on the angle β.
Here, FIG. 15 is a graph in which numerical values are assigned to the angles α and β, the horizontal axis is the angle β, and the vertical axis is BG / CD.

As mentioned above, the condition that BG / CD is less than 1 is desirable.
When the BG / CD is set to 1 or more, the water droplets transmitted through the second front side end portion 32e of the second heat exchanger unit 32 do not reach the corner portion B of the first heat exchanger unit 31. Then, there is a possibility that the water droplets collide with the inner surfaces of the filter 42 and the housing 10 and jump out to the outside of the first unit 100A, leading to a dew-spraying defect.
On the other hand, when the BG / CD is set to less than 1, water droplets transmitted through the second front side end portion 32e of the second heat exchanger unit 32 reach the corner portion B of the first heat exchanger unit 31. Then, the water droplets flow to the back side of the housing 10 along the upper end 31a of the first heat exchanger unit 31 without jumping out of the first unit 100A, and can be collected by the drain pan 41.

When bare fins are used as the first heat radiation fin 60a and the second heat radiation fin 60b to create a heat exchanger 30, the BG / CD is 0.96, the angle α is 65 degrees, and the angle β is 45 degrees. It was verified that no dew splash occurred.

<Modification example of heat exchanger 30>
FIG. 17 is a schematic view for explaining a modified example of the heat exchanger formed by the method for manufacturing the heat exchanger according to the second embodiment of the present invention. Based on FIG. 17, a configuration of a modified example of the heat exchanger 30 formed by the method for manufacturing the heat exchanger according to the second embodiment of the present invention will be described.

As shown in FIG. 17, the same can be considered when the first heat exchanger unit 31 is arranged at an angle. Specifically, the first heat exchanger unit 31 is tilted so that the angle δ formed by the perpendicular line and the first front side end portion 31e, that is, the upper side is located on the front side and the lower side is located on the back side. It may be arranged. By arranging the first heat exchanger unit 31 in this way, the flow of air sucked by the blower fan 20 can be made to follow the first heat exchanger unit 31, and the size of the housing 10 can be suppressed. ..

Let γ be the angle formed by the second heat exchanger unit 32 and the perpendicular line.
Let δ be the angle formed by the first front side end portion 31e of the first heat exchanger unit 31 and the perpendicular line.
β = γ + δ.
At this time, when the angle δ was 30 degrees, the angle α was 65 degrees, and the angle β was 45 degrees, it was verified that dew skipping did not occur.

As described above, in order to suppress dew flying, it is necessary that BG <CD.
Applying β = γ + δ to the above equation,
BG = L1 · sin (α) <CD = L1 · sin (π-α-γ-δ).
Therefore, it is desirable that BG / CD = sin (α) / sin (π-α-γ-δ) <1. In particular, if the angle α ≦ 45 degrees, it does not depend on the angles γ and δ.

As described above, if the extension line of the second front end side end portion 32e is configured to intersect the upper end portion 31a, the positions of the corner portions C and the corner portions D need not be matched, and jump prevention or jump prevention or It will have the effect of reducing the amount of dew flying.

As described above, in the method for manufacturing the heat exchanger according to the second embodiment of the present invention, the plate-shaped member to be the heat radiation fin 60 is diagonally cut into two, one is used as the first heat radiation fin 60a, and the other is. The second heat dissipation fin 60b is used.
Therefore, according to the method for manufacturing a heat exchanger according to the second embodiment of the present invention, waste when forming the heat exchanger 30 is eliminated, and the productivity is increased.

Since the air conditioner 100 includes a first unit 100A and a second unit 100B connected to the first unit 100A, the air conditioner 100 has all the effects of the first unit 100A.

In the above description, the present invention has been described by taking the first unit 100A installed on the wall surface of the living room as an example, but the present invention is not limited to this, and indoor units having other structures, for example, floor-standing indoor units can also be used. The present invention can be applied.

10 housing, 11 suction port, 12 front grill, 13 left and right flaps, 14 outlet, 15 casing, 16 upper flap, 17 lower flap, 18 nozzles, 20 blower fan, 30 heat exchanger, 31 first heat exchanger Unit, 31C 1st heat exchanger unit, 31X 1st heat exchanger unit, 31a upper end, 31aX upper end, 31d 1st back side end, 31e 1st front side end, 32 2nd heat exchanger Unit, 32X 2nd heat exchanger unit, 32a lower end, 32aX lower end, 32d 2nd back side end, 32e 2nd front side end, 32eX 2nd front side end, 33 3rd heat exchanger Unit, 40 air passage, 41 drain pan, 42 filter, 50 heat transfer tube, 50a first heat transfer tube, 50b second heat transfer tube, 50X heat transfer tube, 51 compressor, 52 four-way switching valve, 53 heat source side heat exchanger, 54 expansion Valve, 55 heat source side blower fan, 56 gas side connecting pipe, 57 liquid side connecting pipe, 58 refrigerant pipe, 60 heat dissipation fin, 60a first heat radiation fin, 60b second heat heat fin, 60X heat radiation fin, 70 refrigerant circuit, 100 air Harmonizer, 100A 1st unit, 100B 2nd unit, A corner, A1 chamfer, B corner, C corner, C1 chamfer, D corner L1 vertical line, L2 vertical line, X area.

Claims (7)

With the housing
The first heat exchanger unit, which is installed in the housing and whose upper end is inclined when viewed from the side in the installed state,
It is arranged above the first heat exchanger unit of the housing, and is inclined so that the lower part is located on the front side and the upper part is located on the back side when viewed from the side in the installed state. A second heat exchanger unit with an inclined end and
The first heat exchanger unit and the blower fan installed on the back side of the housing with respect to the second heat exchanger unit are provided.
The upper end and the lower end are
The flow of air sucked by the blower fan is inclined downward from upstream to downstream.
The upper corner on the front side of the first heat exchanger unit is smaller than 90 degrees, and the upper corner on the back side is larger than 90 degrees.
Wherein the upper end of the first heat exchanger unit is rather long than the lower end of the second heat exchanger unit,
The first heat exchanger unit and the second heat exchanger unit are each provided with heat dissipation fins.
The heat radiation fins of the first heat exchanger unit and the heat radiation fins of the second heat exchanger unit are separated from each other.
A unit provided with a gap between the upper end portion of the first heat exchanger unit and the lower end portion of the second heat exchanger unit. When the first heat exchanger unit and the second heat exchanger unit installed in the housing are viewed from the side,
The unit according to claim 1, wherein an extension line of the front end portion of the second heat exchanger unit intersects the upper end portion. When the first heat exchanger unit and the second heat exchanger unit installed in the housing are viewed from the side,
The angle formed by the upper end and the horizon is defined as φ.
When the angle formed by the lower end and the horizon is the angle θ,
The unit according to claim 1 or 2, wherein the angle φ is 5 degrees or more and the angle θ or less. When the first heat exchanger unit and the second heat exchanger unit installed in the housing are viewed from the side,
The upper end is
The unit according to any one of claims 1 to 3, which is curved so as to be convex downward. The unit according to any one of claims 1 to 4, wherein the corner of the lower front side and the lower corner of the back side of the second heat exchanger unit are 90 degrees. The invention according to any one of claims 1 to 5, wherein the lower corner portion on the back side of the second heat exchanger unit is located directly above the corner portion on the upper rear side of the first heat exchanger unit. Unit. The unit according to any one of claims 1 to 6, and the unit.
Equipped with a heat source side unit,
An air conditioner that has a refrigerant circuit formed by connecting the elemental equipment mounted on each unit with piping.

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