JP5611605B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an upper blowing type air conditioner that includes a blower at the top of a housing.

Conventionally, a compressor disposed on a bottom plate of a housing having a substantially rectangular horizontal section, a heat exchanger disposed on the bottom plate in a U-shape along the three side surfaces of the housing, There is known an outdoor unit of an air conditioner including an air blower (axial fan) disposed on an upper portion of a heat exchanger and an electrical equipment box containing electrical components for controlling the compressor and the air blower.
This type of outdoor unit is often installed on the roof of a building, between buildings, and the like, and since the installation space for the outdoor unit is limited, downsizing of the outdoor unit is required. On the other hand, in order to improve the heat exchange efficiency of the heat exchanger in a limited housing volume, an opening surface is provided for maintenance on one side surface of the housing in the longitudinal direction, and the axial center of the blower is provided. Shift to the left or right side of the opening surface in a predetermined direction, place the electrical box on the side of the opening surface where the shaft center of the blower is placed, place the compressor behind this electrical box, An outdoor unit in which a space for reducing ventilation resistance is provided is disclosed (see, for example, Patent Document 1).

JP 2008-128496 A

However, since the compressor includes electric elements such as a motor and a coil, the maintenance frequency is high, and since this compressor is disposed on the rear side with respect to the opening surface of the outdoor unit, the maintainability is deteriorated. Furthermore, there is a problem that this compressor obstructs the flow of air in the housing and greatly affects the heat exchange efficiency of the heat exchanger.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the small outdoor unit which improved the maintainability and the heat exchange efficiency of the heat exchanger.

In order to achieve the above object, the present invention provides a compressor disposed on a bottom plate of a housing, and a cross-section substantially disposed on the bottom plate along three surfaces on the back side and both side surfaces of the housing. In an outdoor unit of an air conditioner including a U-shaped heat exchanger and a blower disposed on the top of the heat exchanger, the heat exchanger is arranged in a depth direction located on both side surfaces of the housing. The length is longer than the length in the width direction located on the back side of the housing, and the compressor is positioned such that at least a part of the compressor is located forward of the tube plate of the heat exchanger. The partition is divided into a machine room provided close to the front side of the casing and a heat exchange chamber provided on the back side of the casing. The machine room is divided into the compressor and a refrigerant circuit configuration connected to the compressor An electrical box containing the electrical equipment for controlling the compressor or the blower is disposed in a space above the compressor and in front of the blower. The partition plate for preventing raindrops from directly falling on the equipment accommodated in the machine room extends upward to the lower end, and the heat exchange chamber has a refrigerant circuit together with the compressor and the refrigerant circuit components. an accumulator forming part of, the oil separator and receiver tank is housed together with the heat exchanger, the top center of the accumulator, characterized in that it is fixed to the housing of the rear of the accumulator by using a frame .

In this arrangement, the refrigerant circuit components connected to said compressor, said with compressor being arranged close to the front side of the housing, before Symbol electric box, a front side of the housing, wherein It is good also as a structure provided in the upper part of a compressor in the position which overlaps with the said air blower in a height direction. Moreover, the housing, the comprises a plum Maintenance panel covering the front side of the housing, the maintenance panels have a structure that is provided screwed on detachably the housing is divided into two vertically good. Further, wherein the housing of the bottom plate, the accumulator may be configured to pre Kio yl separator and the receiver tank are disposed in the rear of the compressor.

  According to the present invention, the heat exchanger is formed such that the length in the depth direction located on both side surfaces of the housing is longer than the length in the width direction located on the back surface side of the housing. The compressor is arranged on the front side of the casing so that at least a part of the compressor is positioned in front of the tube plate of the heat exchanger. The area of the exchanger can be increased. In addition, a maintenance space for the compressor can be secured on the front surface of the casing, and the influence on the air flow in the casing of the compressor can be minimized. Therefore, even if the housing is reduced in size, it is possible to provide an outdoor unit that is excellent in heat exchange efficiency and maintainability.

It is an external appearance perspective view of the outdoor unit of the air conditioning apparatus which shows one embodiment of this invention. It is a sectional side view of an outdoor unit. It is a top view which shows the internal structure of an outdoor unit. It is a front view of an outdoor unit in the state where a front panel was removed. It is an expansion perspective view of a valve stand.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The air conditioner according to this embodiment includes an outdoor unit 10 and an indoor unit (not shown), and performs a cooling operation and a heating operation by flowing a refrigerant through a refrigerant circuit connected by a refrigerant pipe. The outdoor unit 10 is installed outside, exchanges heat with outdoor air, condenses the refrigerant during the cooling operation and releases heat to the outside air, and evaporates the refrigerant during the heating operation and takes in heat from the outside air. In addition, the directions such as up and down and left and right described below indicate directions when the outdoor unit 10 is viewed from the front side in a state where the outdoor unit 10 is installed.

FIG. 1 is an external perspective view of the outdoor unit 10. The outdoor unit 10 includes a unit case (housing) 11 having a substantially rectangular parallelepiped box shape, and the unit case 11 is spanned over a pair of leg members 13 and 13 extending in the front-rear direction, and a bottom plate 12 fixed. The bottom plate 12 includes support columns 14 extending in the vertical direction from four corners and a front panel 15.
A heat exchanger 21 to be described later is disposed on the bottom plate 12, and the back surface and the left and right side surfaces of the unit case 11 are formed by the heat exchanger 21. In addition, a blower 22 and a bell mouth 25 are arranged around the blower 22 at the upper part of the heat exchanger 21, and a fan guard for preventing contact with the blower 22 in the blowout opening 25 </ b> A of the bell mouth 25. 26 is arranged. A decorative panel 27 provided with a heat insulating material such as foamed polystyrene is provided around the bell mouth 25.
The front panel 15 includes an upper panel 15A and a lower panel 15B which are divided into upper and lower parts, and the upper panel 15A and the lower panel 15B are bridged between the columns 14 and 14 on the front side and are detachably screwed together. Have been provided.

Next, the arrangement configuration of each device in the unit case 11 will be described.
FIG. 2 is a side sectional view of the outdoor unit 10, and FIG. 3 is a top view showing an internal configuration of the outdoor unit 10.

As shown in FIG. 2, the blower 22 includes a fan motor 23 disposed above the heat exchanger 21, and a propeller fan (impeller) 24 attached to the shaft of the fan motor 23. . A connection member (not shown) that connects the support columns 14, 14 is provided between the adjacent support columns 14, 14 at a position corresponding to the upper end of the heat exchanger 21, and the fan motor 23 spans between the connection members. It is fixed to a pair of support frames (not shown).
When the propeller fan 24 is rotationally driven by the fan motor 23, as shown by the arrow X in the periphery of the outdoor unit 10, more specifically, in FIG. Outside air is sucked into the unit case 11 from the side and right side, and is discharged outside through the blowout opening 25 </ b> A of the bell mouth 25 provided on the upper surface of the unit case 11. That is, the outdoor unit 10 is configured as a top blowing type that blows out air after heat exchange from the top surface.

  Inside the unit case 11, an accumulator 35, an oil separator 36, and a receiver tank 37 that constitute a part of the refrigerant circuit together with the compressors 30 </ b> A and 30 </ b> B and the refrigerant circuit component 32 are disposed on the bottom plate 12. Further, the unit case 11 is provided with a partition plate 38 that extends upward from the bottom plate 12 to the lower end of the electrical box 34, and the partition plate 38 allows the inside of the unit case 11 to be connected to the heat exchange chamber 39, the machine chamber 40, It is divided into. The partition plate 38 is provided in order to prevent raindrops from being directly applied to each device accommodated in the machine room 40. In addition, the partition plate 38 is formed with an opening through which a pipe connecting devices arranged in each chamber passes.

  As shown in FIG. 3, the unit case 11 is formed in a substantially rectangular shape in which the length L1 in the depth direction is longer than the length L2 in the width direction. Further, the blower 22 is arranged so that the rotation axis O of the propeller fan 24 is located at a position that is approximately equal distance from the back side and both side surfaces of the unit case 11. Therefore, in this configuration, the blower 22 is disposed at a position where the rotation shaft O of the propeller fan 24 has moved to the back side, so that a space is formed on the front side of the blower 22 accordingly. In the space formed in front of the blower 22, an electrical box 34 is disposed, and the electrical box 34 is disposed at a position overlapping the blower 22 and the bell mouth 25 in the height direction. As a result, the electrical box 34 passes through the heat exchanger 21 and does not impede the flow of air blown from the blower 22, and the ventilation resistance in the unit case 11 can be reduced. The blowing noise can be reduced without increasing the size of the fan.

  On the bottom plate 12 of the unit case 11, a heat exchanger 21 formed by being bent in a substantially U-shaped cross section is disposed. The heat exchanger 21 extends from the left side surface of the unit case 11 to the back surface and the right side surface. Are arranged. On both end surfaces of the heat exchanger 21 formed by being bent into a substantially U-shaped cross section, there are provided tube plates 21A for fixing refrigerant pipes that are continuously bent in the heat exchanger 21 and piped. ing. In the present embodiment, the heat exchanger 21 is integrally formed by bending in a substantially U-shaped cross section. For example, two heat exchangers formed in a substantially L-shaped cross section are used. May be arranged opposite to each other in a substantially U-shaped cross section.

  By the way, in recent years, there is an increasing demand for downsizing of the outdoor unit in consideration of restrictions on installation area and maintenance space, or taking in an elevator and passing through a door in order to place the outdoor unit on the roof of a building. Therefore, it is desirable that the outdoor unit is small in size, has high heat exchange efficiency, and can be easily maintained. For this reason, in this structure, the unit case 11 is reduced in size, the heat exchange efficiency is high, and the outdoor unit which can perform a maintenance easily is implement | achieved.

Specifically, as shown in FIG. 3, the unit case 11 of this configuration is formed in a substantially rectangular shape in which the length L1 in the depth direction is longer than the length L2 in the width direction. The case 11 is arranged and provided in the width direction which is the short direction. Also, with respect to the heat exchanger 21 arranged in the unit case 11, the length L3 in the depth direction located on both side surfaces of the unit case 11 is the length in the width direction located on the back side of the unit case 11. It is formed longer than the length L4.
In this configuration, since the opposing two sides of the heat exchanger 21 formed in a substantially U-shaped cross section are formed longer than the other side, when comparing heat exchangers with the same heat exchange area, The installation area of the heat exchanger 21 can be reduced as compared with the case where the other side is formed longer than the two opposite sides, so that the installation area of the unit case 11 can be reduced.

  The inside of the unit case 11 is divided into a heat exchange chamber 39 and a machine room 40 by a partition plate 38, and the machine room 40 is provided on the front side of the unit case 11 as shown in FIG. . In the machine room 40, compressors 30A and 30B having electric elements such as motors and coils having a high maintenance frequency, and refrigerant circuit components 32 such as a valve body such as a four-way valve 31 and an expansion valve are connected by piping and accommodated. Yes. In addition, the electrical box 34 for controlling various devices of the outdoor unit 10 is arranged and provided above the compressors 30A and 30B.

  As shown in FIG. 3, the compressors 30 </ b> A and 30 </ b> B are at least partially positioned forward of the tube plates 21 </ b> A provided on both end faces of the heat exchanger 21 having a substantially U-shaped cross section. Are arranged on the front side of the unit case 11. According to this configuration, since the flow of air sucked from the heat exchanger 21 can be minimized by the compressors 30A and 30B, the air flow in the unit case 11 is improved, and the outdoor The energy efficiency of the unit 10 is improved.

  In addition, a valve base 45 is screwed to the support 14 on the left side of the front surface of the unit case 11, and service valves 46, 47, and 48 are concentrated on the valve base 45. The service valves 46, 47, and 48 are a gas pipe service valve 46, a liquid pipe service valve 47, and an oil balance pipe service valve 48, respectively. One end of the valve base 45 is screwed to the column 14, and the gas pipe service valve 46 having the highest piping pressure is disposed at a position closest to the portion screwed to the column 14. Near the center of the valve base 45, a support member 49 is screwed into the valve base 45, and the support member 49 is further screwed into the bottom plate 12 to improve the strength of the valve base 45. The support member 49 may be configured to use a reinforcing metal fitting such as an L-shaped metal fitting.

As a result, the gas pipe service valve 46, the liquid pipe service valve 47, and the oil balance pipe service valve 48 are concentrated on the valve base 45, so that the gas pipe service valve 46 and the liquid pipe service valve 47 are arranged. And valve operation with the oil balance pipe service valve 48 can be performed intensively.
Further, as shown in FIG. 5, the valve base 45 is formed by bending a piece of metal plate, and each service valve 46, 47, 48 is accommodated in the machine room 40, and each service valve 46. , 47, 48, the service tool such as a wrench is arranged so as not to interfere with the other service valves 46, 47, 48. Further, the upper end or the lower end of the valve base 45 is subjected to L-bending, and is bent substantially perpendicularly to the installation surface of the service valves 46, 47, 48 so that the strength of the valve base 45 is increased. Yes.

  According to these configurations, by removing the upper panel 15A or the lower panel 15B of the front panel 15, the compressors 30A and 30B, the refrigerant circuit component 32, or the electrical box 34 that are frequently maintained by the operator from the front side. It is possible to easily carry out maintenance work for the electrical components and the like in the inside, and it is possible to collectively perform the valve operations of the gas pipe service valve 46, the liquid pipe service valve 47, and the oil balance pipe service valve 48. . Moreover, the machine room 40 covered with the partition plate 38 is provided close to the front side of the unit case 11, and the area of the partition plate 38 that overlaps the suction port of the heat exchanger 21 can be minimized. In addition, since the compressors 30A and 30B and the refrigerant circuit component 32 are collectively accommodated in the machine room 40, it is possible to improve the flow of air in the unit case 11 and improve the heat exchange efficiency. Can do.

The heat exchange chamber 39 is a pressure vessel for temporarily storing refrigerant or refrigerating machine oil, and stores an accumulator 35, an oil separator 36, and a receiver tank 37 with a low maintenance frequency together with the heat exchanger 21 (see FIG. 3). ). The accumulator 35, the oil separator 36, and the receiver tank 37 are arranged side by side behind the partition plate 38, and are provided so that there is sufficient space between the respective sealed containers.
The frame 17 is fixed to the center of the upper portion of the accumulator 35. The frame 17 extends from the upper end of the accumulator 35 and is fixed to a connecting member that connects the columns 14 and 14, and prevents the accumulator 35 from swinging. ing.

  According to these configurations, since the various closed containers of the accumulator 35, the oil separator 36, and the receiver tank 37 with low maintenance frequency are arranged behind the machine room 40 in which the compressors 30A and 30B with high maintenance frequency are accommodated, maintenance is performed. The accumulator 35, the oil separator 36, and the receiver tank 37 that are infrequent are not disturbed during maintenance work of the compressors 30A, 30B, etc. in the machine room 40, and the maintenance work efficiency of the outdoor unit 10 can be improved. . Further, since the heat exchange chamber 39 is provided so that a sufficient space is formed between the respective sealed containers of the accumulator 35, the oil separator 36, and the receiver tank 37, the flow of air in the heat exchange chamber 39 is not hindered, and Since the flow of the wind in the exchange chamber 39 is improved, the heat exchange efficiency is improved. Further, since the accumulator 35 is fixed to the unit case 11 using the frame 17, the accumulator 35 is made tall, the amount of refrigerant is increased, and piping between an indoor unit (not shown) and the outdoor unit 10 is connected. Even if the length is increased, the accumulator 35 does not swing.

  Thus, according to the present embodiment, the unit case 11 is formed in a substantially rectangular shape in which the length L1 in the depth direction is longer than the length L2 in the width direction. Since the U-shaped heat exchanger 21 is arranged along the three surfaces of the back surface in the width direction, when comparing heat exchangers having the same heat exchange area, one side other than the two opposite sides Since the installation area of the heat exchanger 21 can be reduced compared to the case where the heat exchanger 21 is formed longer, the heat transfer area and the heat exchange efficiency of the heat exchanger 21 can be maintained even if the unit case 11 is downsized. it can. Further, since the compressors 30A and 30B having a high maintenance frequency are arranged close to the front side of the unit case 11 formed in a substantially rectangular shape in which the length L1 in the depth direction is longer than the length L2 in the width direction, the unit case 11 is Even if the size is reduced, a space for maintaining the compressors 30 </ b> A and 30 </ b> B having a high maintenance frequency can be easily secured on the front side of the outdoor unit 10, and the maintainability of the outdoor unit 10 can be improved. Further, the compressor case 30A, 30B has a unit case 11 so that at least a part thereof is positioned in front of the tube plates 21A provided on both end faces of the heat exchanger 21 having a substantially U-shaped cross section. Therefore, the flow of air sucked from the heat exchanger 21 can be minimized by the compressors 30A and 30B, and the wind in the unit case 11 can be reduced. Distribution can be improved and the energy efficiency of the outdoor unit 10 can be improved.

  Further, according to the present embodiment, the refrigerant circuit components 32 connected to the compressors 30A and 30B are arranged close to the front side of the unit case 11 together with the compressors 30A and 30B. The maintenance of the valve body such as the four-way valve 31 and the expansion valve included in the valve 32 can be performed efficiently. In addition, the compressor 30A, 30B or the refrigerant circuit component 32 does not prevent the outside air from being sucked into the unit case 11 via the heat exchanger 21, and further, the flow of wind in the unit case 11 Therefore, the heat exchange efficiency in the heat exchanger 21 is improved.

  Moreover, according to this embodiment, in order to perform maintenance easily, the electrical equipment box 34 that is often arranged on the front side of the unit case 11 is provided at a position overlapping the blower 22 in the height direction. Therefore, the electrical box 34 does not obstruct the flow of air blown out from the blower 22 through the heat exchanger 21, and the ventilation resistance in the unit case 11 can be reduced. Further, the compressors 30A and 30B and the refrigerant circuit component 32 can be arranged on the front side of the unit case 11 below the electrical box 34, and the compressors 30A and 30B or the refrigerant circuit having a high maintenance frequency can be arranged. Maintenance efficiency of the component 32 can be increased.

  Further, according to the present embodiment, the front surface of the unit case 11 is covered with the front panel 15 that is screwed to the support posts 14 and is detachably provided. The front panel 15 is covered with the upper panel 15A and the lower panel 15B. When the electrical equipment box 34 is maintained, the upper panel 15A is removed, the compressors 30A and 30B, or the refrigerant circuit component 32 are maintained, and the service valve is operated. Can easily perform maintenance work by removing the lower panel 15B.

  In addition, according to the present embodiment, various closed containers of the accumulator 35, the oil separator 36, and the receiver tank 37 that are less frequently maintained than the compressors 30A and 30B or the refrigerant circuit component 32 are provided behind the compressors 30A and 30B. Therefore, the accumulator 35, the oil separator 36, the receiver tank 37, etc. with low maintenance frequency do not interfere with the maintenance work during the maintenance work of the compressors 30A, 30B with high maintenance frequency. Therefore, the work efficiency of the maintenance of the outdoor unit 10 can be improved.

  Further, according to the present embodiment, the frame 17 is fixed to the center of the upper portion of the accumulator 35, and the frame 17 is fixed to the connecting member that connects the support columns 14 and 14 of the unit case 11. Therefore, the accumulator 35 is Even if the height is increased, the amount of refrigerant is increased, and the piping between the indoor unit and the outdoor unit is lengthened, the accumulator 35 does not swing.

L1 Depth direction L2 Width direction 10 Outdoor unit 11 Unit case (housing)
12 Bottom plate 14 Post 15 Front panel 15A Upper panel 15B Lower panel 17 Frame 21 Heat exchanger 21A Tube plate 22 Blower 30A, 30B Compressor 31 Four-way valve 32 Refrigerant circuit component 34 Electrical box 35 Accumulator 36 Oil separator 37 Receiver tank 39 Heat Exchange room 40 Machine room 45 Valve stand 46 Service valve for gas pipe 47 Service valve for liquid pipe 48 Service valve for oil balance pipe

Claims (5)

A compressor disposed on the bottom plate of the housing, a heat exchanger having a substantially U-shaped cross section disposed on the bottom plate along three surfaces on the back side and both side surfaces of the housing, and the heat exchange In the outdoor unit of the air conditioner comprising a blower disposed on the upper part of the vessel,
The heat exchanger is formed such that a length in a depth direction located on both side surfaces of the housing is longer than a length in a width direction located on a back surface side of the housing, and the compressor includes at least the compressor. Arranged on the front side of the housing so that a part is located in front of the tube plate of the heat exchanger ,
The inside of the housing is divided by a partition plate into a machine room provided close to the front side of the housing and a heat exchange chamber provided on the back side of the housing,
The machine room houses the compressor and refrigerant circuit components connected to the compressor, and the compressor or the blower is placed in a space above the compressor and in front of the blower. An electrical box containing the electrical components to be controlled is placed.
From the bottom plate to the lower end of the electrical box, the partition plate for preventing the raindrops directly from being applied to the equipment housed in the machine room extends upward,
In the heat exchange chamber, an accumulator, an oil separator, and a receiver tank that form part of a refrigerant circuit together with the compressor and the refrigerant circuit components are accommodated together with the heat exchanger,
Outdoor unit of an air conditioner top center of the accumulator, characterized in that it is fixed to the housing of the rear of the accumulator by using a frame. The refrigerant circuit components to be connected to the compressor, the outdoor unit of an air conditioner according to claim 1, characterized in that together with the compressor being arranged close to the front side of the housing.   3. The air according to claim 2, wherein the electrical box is provided on a front surface side of the housing at a position overlapping with the blower in a height direction at an upper portion of the compressor. The outdoor unit of the harmony device.   The said housing | casing is equipped with the maintenance panel which covers the front side of the said housing | casing, The said maintenance panel is divided into 2 parts up and down, and is screwed together and provided in the said housing | casing, It is provided. The outdoor unit of the air conditioning apparatus of 1 thru | or 3. Wherein the housing of the bottom plate, the accumulator, outside of the front Kio yl separator and air conditioning apparatus according to any one of claims 1 to 4 wherein the receiver tank is characterized in that it is arranged behind the compressor unit.

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