JPWO2017056152A1 - Indoor unit - Google Patents

Abstract

An indoor unit that can occupy a small installation area and maintain air blowing efficiency. The indoor unit has a main body provided with a suction port on the upper surface and a blower outlet on the lower surface, a fan that is housed in the main body and forms an air passage from the suction port to the blower port, and a fan casing that houses the fan The fan casing is a box-shaped housing, and has an air inlet formed on the upper surface, an air outlet formed on the lower surface, and a side surface. And an occluding plate that covers the opening and is removable.

Description

  The present invention relates to an indoor unit, and particularly to a structure of a fan casing mounted on the indoor unit.

  For example, in a large-capacity air conditioner arranged in a computer room or the like, the ratio of the power consumption of the indoor unit fan motor to the power consumption of the entire air conditioner is larger than that of a general home air conditioner. Therefore, the power consumption of the indoor unit fan motor is reduced by using a turbo fan with good blowing efficiency as a centrifugal fan that is generally provided. For example, a sirocco fan has a fan efficiency of about 45 to 60%, while a turbo fan has a fan efficiency of about 65 to 80%.

  Since the sirocco fan can achieve higher air blowing efficiency than the box shape when the fan casing has a scroll shape, a scroll-shaped fan casing is generally employed. On the other hand, in the case of a turbo fan, the size of the fan casing has a greater effect on the blower efficiency than the shape of the fan casing, so a box-shaped fan casing is adopted, which saves energy and increases the efficiency of the entire indoor unit. Realized. For example, in the indoor unit structure of Patent Document 1, a box shape is adopted for a fan casing of a turbofan. In this structure, by increasing the ratio of the fan casing to the projected area inside the indoor unit, it is possible to reduce the power consumption of the indoor unit fan motor and improve the blowing efficiency.

  By the way, when installing an indoor unit, piping provided on the inner surface of the indoor unit is brazed to and connected to piping outside the unit. The operation of brazing the piping involves the operation of heating the piping on the inner surface of the indoor unit with a gas welding torch from the front of the indoor unit. In order to enable such work, a work space is generally provided between the fan casing and the inner surface of the indoor unit.

JP 2014-119126 A

  When the indoor unit is provided with a turbo fan as in Patent Document 1, a work space is provided adjacent to the box-shaped fan casing. When the fan casing is enlarged in order to improve the blowing efficiency of the turbo fan, the indoor unit is provided with a region occupied by the fan casing and a region occupied by the work space, and the entire indoor unit becomes large. .

  In order to reduce the size of the indoor unit, it is conceivable to reduce the work space provided in the indoor unit. However, in general, a control box fixed from the outside of the indoor unit is placed in front of the pipe to be brazed to the pipe outside the machine to relay the power line, so work from the front of the indoor unit. Then, the view is obstructed by the control box. If brazing can be performed from the side of the indoor unit, the control box will not obstruct the field of view, but a construction / service space must be provided for workers handling the gas welding torch. In this case, even if the entire indoor unit can be reduced in size, it occupies a large area as an installation location including a construction / service space, and it is difficult to arrange in a limited space.

  Thus, it is difficult to achieve both improvement of the blowing efficiency and downsizing of the indoor unit, and there is a limit to reducing the installation area while maintaining the blowing efficiency.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an indoor unit that can reduce the occupied installation area as much as possible and maintain the blowing efficiency.

  The indoor unit according to the present invention has a main body provided with a suction port on the upper surface and a blower outlet on the lower surface, a fan accommodated in the main body and forming an air passage from the suction port toward the blower port, A fan casing that accommodates the fan; and a heat exchanger provided in the air passage, wherein the fan casing is a box-shaped housing, and is formed on the lower surface and an air inlet formed on the upper surface. And an opening formed on the side surface, and a detachable closing plate that covers the opening.

  According to the indoor unit according to the present invention, since the opening portion and the detachable closing plate are provided in the fan casing, the closing plate is removed when the indoor unit is installed, and the opening portion is opened. The space inside the fan casing can be used as a work space. Therefore, there is no need to provide a work space inside the indoor unit, the installation area occupied by the indoor unit can be kept small, and the size of the fan casing can be maintained, so that the fan blowing efficiency can be maintained. it can.

It is a perspective view of the internal structure of the indoor unit which concerns on embodiment. It is a disassembled perspective view of the fan casing of the indoor unit of FIG. It is a fragmentary perspective view of the attachment structure of the control box in the indoor unit of FIG. It is a disassembled perspective view of the attachment structure of the control box in the indoor unit of FIG. It is a perspective view explaining the installation operation | work of the indoor unit of FIG. It is a modification of the fan casing which concerns on embodiment.

Embodiment.
The indoor unit according to the present embodiment is, for example, a floor-standing, bottom-blowing type indoor unit installed in a computer room or the like. A valve and a condenser are disposed outside the apparatus, and are sequentially connected by a refrigerant pipe to form a refrigerant circuit. FIG. 1 is a perspective view showing the internal structure of the indoor unit 100 according to the present embodiment. As shown in FIG. 1, an indoor unit 100 according to the present embodiment includes a suction port 1, an air outlet 2, a main control box 3, a control box 4, an evaporator 5, a main drain pan 6 and a sub drain pan. 7 and a fan casing 9. The evaporator 5 is an example of a heat exchanger that functions as an indoor heat source. These internal configurations are housed in an outer wall formed by a frame and an exterior panel (not shown) to constitute the main body of the indoor unit 100. A heat insulating material is affixed to the exterior panel to prevent the ambient heat including the pipe 10 of the indoor unit 100 from being transmitted to the outside. In the following description, a region indicated by a dotted circle A is the right side at the bottom of the indoor unit 100 and the front side.

  The air inlet 1 and the air outlet 2 are an air inlet and an air outlet, and form an air path from the air inlet 1 toward the air outlet 2 by driving a fan 19 such as a turbofan housed in the fan casing 9. The evaporator 5 is disposed in an air passage generated by the fan 19 immediately below the suction port 1 and has an inverted V shape in cross-sectional view inclined with respect to the air passage. The evaporator 5 causes the refrigerant to flow through a refrigerant pipe (not shown) inside the evaporator 5 and generates harmonized air by heat exchange between the refrigerant and the passing air. The refrigerant pipe of the evaporator 5 is connected to the outside of the indoor unit 100 via a pipe 10 that constitutes a part of the refrigerant circuit, thereby forming a refrigerant circuit.

  A heat insulating material or the like is disposed around the portion where the refrigerant pipe is joined to the pipe 10 to prevent condensation that is likely to be generated by the air that has undergone heat exchange in the evaporator 5 and has become low temperature. Further, in order to collect drain water generated by condensation, a sub-drain pan 7 is provided along the side surface of the evaporator 5 on the side surface of the evaporator 5, and a main drain pan 6 is provided at the lower end portion of the evaporator 5. Is arranged. The sub drain pan 7 receives drain water scattered from the evaporator 5, and the main drain pan 6 receives drain water flowing down from the evaporator 5. The collected drain water is discharged to the outside of the indoor unit 100 by the drain hose 8 connected to the bottom surface of the main drain pan 6.

  The main control box 3 is provided below the suction port 1. A power line (not shown) relayed by the control box 4 is connected to the main control box 3. The power line is drawn into the indoor unit 100 from the outside of the indoor unit 100 through the bottom surface. Since the control box 4, the pipe 10, and the drain hose 8 are connected to the structure outside the indoor unit 100, they are provided close to each other.

  2 is an exploded perspective view of the fan casing 9 of the indoor unit 100 in FIG. 1, and a portion indicated by a dotted circle A corresponds to a region in the dotted circle in FIG. As shown in FIG. 2, the box-shaped fan casing 9 accommodates a housing 9 a having an air inlet 11 and an air outlet (not shown), and a fan 19 therein. When the fan 19 is driven, air is sucked in from the air inlet 11 at the top of the fan casing 9 and blown out from the air outlet, thereby forming an air passage from the inlet 1 to the outlet 2 in the indoor unit 100. Is done. Openings 13a and 13b are respectively provided on the right side and the front side of the box-shaped fan casing 9, and each of the openings 13a and 13b is covered with removable closing plates 12a and 12b. Yes. The closing plates 12a and 12b are screwed and fixed to the fan casing 9 so as to cover the openings 13a and 13b. In FIG. 2, the opening 13b is provided on the right side surface of the fan casing 9, but the opening 13b may be provided on the side surface adjacent to the pipe 10, and the pipe 10 is adjacent to the left side surface. In this case, the opening 13b may be provided on the left side surface. In FIG. 1, two fan casings 9 are disposed adjacent to each other, but the number of fan casings 9 is not limited and only one may be used.

  FIG. 3 is a partial perspective view of the mounting structure of the control box 4 in the indoor unit 100 of FIG. 3 is a view of the direction of the region indicated by the dotted circle A from the left front of the indoor unit 100 in FIG. 1, and includes an exterior panel that covers the front surface of the indoor unit 100, and closing plates 12 a and 12 b of the fan casing 9. Indicates a state where is removed. As shown in FIG. 3, the control box 4 attached to the inner surface of the indoor unit 100 and the pipe 10 behind the control box 4 are disposed adjacent to the fan casing 9 having openings 13a and 13b. Yes. The positions where the openings 13a and 13b are formed are not particularly limited as long as the pipes 10 arranged on the rear side of the control box 4 can be seen through the opened openings 13a and 13b. Good. The closing plates 12 a and 12 b removed from the fan casing 9 can be temporarily placed in a temporary storage place formed on the inner surface of the indoor unit 100.

  4 is an exploded perspective view of the mounting structure of the control box 4 in the indoor unit 100 of FIG. As shown in FIG. 4, the control box 4 is fixed to the inner surface of the frame 15 via an intermediate sheet metal 16. A screw 17 a screwed from the inside of the indoor unit 100 fixes the mounting plate 4 a extending from the control box 4 and the intermediate sheet metal 16. 17 b that is screwed from the outside of the indoor unit 100 fixes the intermediate sheet metal 16 to the square plate 15 a of the frame 15. The control box 4 is screwed to the intermediate sheet metal 16, the intermediate sheet metal 16 is screwed from the outer surface of the square plate 15 a of the frame 15, and the control box 4 is fixed to the inside of the frame 15. That is, the control box 4 to which the intermediate sheet metal 16 is screwed is fixed to the inside of the frame 15 by the intermediate sheet metal 16 being screwed from the outside of the frame 15 and is directly screwed from the outside of the frame 15. Not.

  Then, the manufacturing process of the indoor unit 100 is demonstrated, referring FIGS. 1-4. In the manufacturing process of the indoor unit 100, first, an internal structure excluding the control box 4 of the indoor unit 100 shown in FIG. 1 is constructed, and a frame 15 surrounding the internal structure is assembled as a framework of the indoor unit 100. At this time, the openings 13a and 13b of the fan casing 9 are closed by the closing plates 12a and 12b. The intermediate sheet metal 16 is screwed to the control box 4 with screws 17a in advance. Then, the intermediate sheet metal 16 to which the control box 4 is fixed is disposed inside the frame 15 on the right side surface of the indoor unit 100 and is fixed from the outside of the frame 15 with screws 17b. Thereafter, an exterior panel is applied to the outside of the assembled frame 15, and the exterior panel and the frame 15 on each side are screwed and fixed from the outside to form an outline of the main body by the frame 15 and the exterior panel. The indoor unit 100 that accommodates the internal structure of 1 is completed.

  Next, the installation operation of the indoor unit 100 performed at the installation site of the shipping destination of the manufactured indoor unit 100 will be described. FIG. 5 is a perspective view for explaining the installation operation of the indoor unit 100 of FIG. 1, and shows a state when the indoor unit 100 is viewed from above the left front surface. As shown in FIG. 5, when performing the installation work, an exterior panel (not shown) on the front surface of the indoor unit 100 is removed, and the closing plates 12a and 12b of the fan casing 9 are removed to open the openings 13a and 13b. . The closing plates 12 a and 12 b of the removed fan casing 9 can be temporarily placed on the inner surface of the main body adjacent to the pipe 10. Further, the screw 17 a that fixes the intermediate sheet metal 16 fixed to the frame 15 and the control box 4 from the inside is released, and the control box 4 is removed from the intermediate sheet metal 16. Thereby, a space is created in a part of the fan casing 9 and a region adjacent to the fan casing 9 in the indoor unit 100.

  Next, the pipe 10 is connected to an external refrigerant pipe constituting the refrigerant circuit. Since the refrigerant in the low temperature, high temperature, low pressure, and high pressure flows through the refrigerant circuit, the pipe 10 of the indoor unit 100 and the external refrigerant pipe that is a part of the refrigerant circuit are connected to a welding device such as the gas welding torch 14. It must be securely connected, such as by brazing. In brazing, the gas welding torch 14 is brought close to the pipe 10 from the space formed in the inside of the fan casing 9 formed by opening the openings 13a and 13b and in the adjacent region. Then, the gas welding torch 14 is moved in the range of 90 to 120 ° with a diameter of 300 mm around the pipe 10, and the pipe 10 is heated by the flame of the gas welding torch 14. During heating, the closing plates 12 a and 12 b removed from the fan casing 9 are disposed on the inner side surface of the indoor unit 100. When the flame of the gas welding torch 14 contacts the inner surface of the indoor unit 100 and directly contacts the heat insulating material of the exterior panel, the exterior panel may spread. However, if temporarily placed on the inner surface of the indoor unit 100, the closing plates 12a and 12b function as a curing member, and the heat insulating material of the exterior panel can be prevented from spreading directly in contact with the flame of the gas welding torch 14. . Further, the pipe 10 is sufficiently heated and reliably connected to the refrigerant pipe.

  After the pipe 10 and the refrigerant pipe are connected, the control box 4 is fixed to the indoor unit 100 by fixing the control box 4 to the intermediate sheet metal 16 with screws 17a from the inside of the indoor unit 100. Connect an external power line to the. Then, the closing plates 12a and 12b are screwed to cover the openings 13a and 13b. Finally, the exterior panel is screwed to the front surface of the indoor unit 100, and the installation operation of the indoor unit 100 is completed.

  As described above, the indoor unit 100 opens the openings 13a and 13b of the fan casing 9 even when the work space adjacent to the fan casing 9 is not provided, and the work necessary for welding the space inside the fan casing 9 is performed. It can be secured as a space. Furthermore, since the control box 4 can be removed, it is easier to visually recognize the pipe 10 and to handle a welding apparatus such as the gas welding torch 14.

  When performing maintenance during use, the front panel of the indoor unit 100 may be removed, and the control box 4 and the closing plates 12a and 12b of the fan casing 9 may be removed as necessary. Thereby, it becomes possible to use the internal space of the fan casing 9 as a work space, and to make it easy to visually recognize the piping 10 arranged after the control box 4.

Modified Example FIG. 6 is a modified example of the fan casing according to the present embodiment. As shown in FIG. 6, a box-shaped fan casing 9 in which an opening 13 c is formed at a corner of the fan casing 9 and the opening 13 c is closed by a closing plate 12 c that closes the opening 13 c may be formed. Also in this case, the space inside the fan casing 9 can be used as a work space by removing the closing plate 12c and opening the opening 13c. As described above, the position and shape of the opening may be determined according to the position where the pipe 10 and the control box 4 are arranged, and a closing plate may be provided in accordance with the position and shape of the opening.

  In addition, although the dimension of the opening part formed in the fan casing 9 is not specifically limited, it should be a magnitude | size which can handle a welding apparatus, and is a dimension which can move within the range which a welding apparatus moves reasonably. It is desirable to select as appropriate.

  According to the indoor unit 100 according to the present invention described above, installation work is performed using the inside of the fan casing 9 as a work space by removing the closing plates 12a and 12b of the fan casing 9 and opening the openings 13a and 13b. It can be performed. As a result, the arrangement area of the indoor unit 100 can be reduced without changing the size of the fan casing 9, and the installed indoor unit 100 with a small occupied area while maintaining the blowing efficiency of the fan 19. Is obtained.

  Since the pipe 10 for supplying the refrigerant is disposed between the inner side surface of the indoor unit 100 and the side surface of the fan casing 9 where the opening portion 13a is provided, the opening portion 13a can be opened to open the opening portion 13a. The pipe 10 is easily visible.

  Even when a turbo fan whose air blowing efficiency is easily influenced by the size of the fan casing 9 is used as the fan 19, the area occupied by the indoor unit 100 can be kept small while maintaining the size of the fan casing 9.

  Since the openings 13a and 13b are provided on the two adjacent side surfaces of the fan casing 9, the pipe 10 can be visually recognized through the openings 13a and 13b.

  The closing plates 12a and 12b of the fan casing 9 removed when performing the installation work are disposed on the inner surface of the indoor unit 100, and can function as a curing member that prevents the heat spread of the heat insulating material of the exterior panel during welding.

  The control box 4 is screwed to the intermediate sheet metal 16, and the intermediate sheet metal 16 disposed on the inner side surface of the indoor unit 100 main body is screwed from the outer side surface of the main body, whereby the control box 4 is fixed to the main body. The control box 4 can be removed by releasing the screw.

  1 inlet, 2 outlet, 3 main control box, 4 control box, 4a mounting plate, 5 evaporator, 6 main drain pan, 7 sub drain pan, 8 drain hose, 9 fan casing, 9a housing, 10 piping, 11 air Inlet, 12a, 12b, 12c Plate, 13a, 13b, 13c Opening, 14 Gas welding torch, 15 Frame, 15a Square plate, 16 Intermediate sheet metal, 17a, 17b Screw, 19 Fan, 100 Indoor unit.

Claims (6)

A main body provided with a suction port on the upper surface and a blower outlet on the lower surface;
A fan that is housed in the main body and forms an air passage from the suction port toward the air outlet;
A fan casing for housing the fan;
A heat exchanger provided in the air path;
With
The fan casing is
A box-shaped housing,
An air inlet formed on the upper surface;
An air outlet formed on the lower surface;
An opening formed on a side surface;
A cover plate that covers the opening and is removable;
Comprising
Indoor unit. A pipe for supplying and discharging a refrigerant to the heat exchanger;
The pipe is provided between the opening of the fan casing and an inner surface of the main body.
The indoor unit according to claim 1. The fan is
A turbofan,
The indoor unit according to claim 1 or 2. The opening is
Of the side surfaces of the fan casing, formed on each of two adjacent surfaces,
The indoor unit as described in any one of Claims 1-3. A temporary storage place where the closing plate is temporarily placed at the time of brazing is provided on the inner surface of the main body,
The indoor unit as described in any one of Claims 1-4. It has a control box screwed to the intermediate sheet metal,
The intermediate sheet metal is screwed from the outer surface of the main body to the inner surface of the main body, and the control box is fixed to the inner surface of the main body.
The indoor unit as described in any one of Claims 1-5.

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