Chilling unit and chilling unit system

Abstract

This chilling unit is provided with: a machine room unit that is formed in a long box shape and houses a compressor and a heat exchanger therein; and a plurality of air heat exchangers that together with the compressor and the heat exchanger constitute a refrigerant circuit and are mounted on the top of the machine room unit. Of the plurality of air heat exchangers, a pair of the air heat exchangers disposed facing each other in the minor-axis direction of the machine room unit are disposed and inclined such that the interval between the upper ends located on the side farther from the machine room unit is greater than the interval between the lower ends located on the side closer to the machine room unit. A machine room panel that forms a lateral surface of the machine room unit in the minor-axis direction is provided with: a panel body that is positioned at the center portion of the machine room panel and that has heat insulation member fixed at a surface facing the inside of the machine room unit; and a fixed portion that is connected to a periphery of the panel body and is fixed in contact with the machine room unit. The panel body is disposed protruding toward the outside of the machine room unit relative to the fixed portion.

Description

[Technical field]

[0001] The present disclosure relates to a chilling unit constituting an air conditioner, a heat pump hot water supply device, a refrigeration device, or the like, and to a chilling unit system having a plurality of such chilling units. [Background technology]

[0002] Conventionally, chilling units have been proposed as heat pump type heat source machines in which heat pump components such as an air heat exchanger, a blower, a compressor, and a heat exchanger are housed within a housing (see, for example, Patent Document 1). The chilling unit of Patent Document 1 has a housing consisting of an upper housing and a lower housing, with the air heat exchanger and the blower housed in the upper housing, and the compressor and the heat exchanger housed in the lower housing. The upper housing is formed with an inclination such that the width decreases downward on both the left and right sides when viewed from the front, and the lower housing is provided continuous with the underside of the upper housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5500725 Summary of the Invention [Problem to be solved by the invention]

[0004] The chilling units of Patent Document 1 may be arranged side by side. In order to minimize the installation space, the chilling units are arranged close to each other so that at least the wider upper housings do not come into contact with the adjacent chilling units. In this case, a space is generated between the lower housings of the adjacent chilling units, and is used as a service space for inspecting or repairing devices such as a compressor, a control box, and an accumulator in the lower housing. In order to minimize the installation space, the chilling unit is configured so that the width of the upper part of the upper housing is small, and the width of the lower housing is also made as small as possible to ensure the service space. As a result, there is no room inside the lower housing, and the devices inside the lower housing are partially in contact with or close to the panel that constitutes the outer shell of the lower housing.

[0005] In some cases, additional members such as heat insulating materials may need to be attached to the panels in areas where the equipment is in partial contact with or in close proximity to the panels. Therefore, even though the multiple panels constituting the outer shell of the lower housing are formed to have the same structure, the positions at which the additional members are fixed differ depending on the position at which the panels are attached to the chilling unit. This poses the problem of lack of compatibility between the multiple panels.

[0006] An object of the present disclosure is to provide a chilling unit and a chilling unit system that can ensure compatibility between multiple panels that form the outer shell of a lower housing without increasing the installation area. [Means for solving the problem]

[0007] The chilling unit according to the present disclosure is formed in a long box shape and comprises a machine room unit accommodating a compressor and a heat exchanger therein, and a plurality of air heat exchangers which constitute a refrigerant circuit together with the compressor and the heat exchanger and are placed on top of the machine room unit, a pair of the plurality of air heat exchangers which are arranged opposite each other in the short direction of the machine room unit are arranged at an angle such that the distance between their upper ends on the side farther from the machine room unit is greater than the distance between their lower ends on the side closer to the machine room unit, and a machine room panel which constitutes a side surface in the short direction of the machine room unit comprises a panel main body located in the center of the machine room panel and a fixing portion which is connected to the periphery of the panel main body and is fixed in contact with the machine room unit, and the panel main body is arranged to protrude toward the outside of the machine room unit relative to the fixing portion. The fixing portion includes a lower end fixing portion located at a lower end of the machine room panel, the lower end fixing portion is connected to the panel body by a lower end connecting portion, and the lower end connecting portion is inclined downward from the panel body toward the lower end fixing portion. is.

[0008] The chilling unit system of the present disclosure is a chilling unit system configured by installing a plurality of the above-mentioned chilling units, in which the distance between the machine room units of two adjacent chilling units in the short direction is set to 350 mm or more. Effect of the Invention

[0009] According to the present disclosure, the chilling unit has a flat panel body in the center of the panel covering the machine room unit that is positioned protruding beyond the fixed part, allowing a large area for arranging the equipment inside the machine room unit. Even if a heat insulating member is fixed to the panel body, the heat insulating member does not need to be formed to fit the equipment inside the machine room unit, so multiple panels are compatible with each other, reducing the management effort required when removing and installing the panels. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a chilling unit 100 according to a first embodiment. [Diagram 2]FIG. 1 is a side view of a chilling unit 100 according to a first embodiment. [Diagram 3] FIG. 1 is a front view of a chilling unit 100 according to a first embodiment. [Figure 4] 2 is a conceptual diagram illustrating the structure of a machine room unit 4 shown in FIG. [Diagram 5] 2 is a plan view showing a schematic internal structure of the machine room unit 4 shown in FIG. [Figure 6] 1 is a conceptual diagram showing a relationship between an air heat exchanger 1 and a machine room unit 4 of a chilling unit 100 according to the first embodiment. [Figure 7] FIG. 2 is a front view of a chilling unit 100L which is a modified example of the chilling unit 100 according to the first embodiment. [Figure 8] 2 is an enlarged perspective view of the periphery of a machine room panel 45b of the chilling unit 100 according to the first embodiment. FIG. [Figure 9] 2 is a cross-sectional view of a machine room unit 4 of the chilling unit 100 according to the first embodiment. FIG. [Figure 10] FIG. 11 is a three-view diagram of the machine room panel 45b alone. [Figure 11] 13 is a rear view of the machine room panel 45b. [Figure 12] FIG. 1 is a perspective view of a chilling unit system 110 according to a first embodiment. [Figure 13] 1 is a conceptual diagram showing the relationship between two adjacent chilling units 100 that constitute a chilling unit system 110 according to the first embodiment. [Figure 14] 13 is an explanatory diagram of the relationship between the line of sight of the worker and a lower connector 47A in the first embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a chilling unit 100 and a chilling unit system 110 according to an embodiment will be described with reference to the drawings. In the following drawings including FIG. 1, the relative dimensional relationship and shape of each component may differ from the actual ones. In the following drawings, the same reference numerals are used to denote the same or equivalent items, and this applies throughout the entire specification. In addition, to facilitate understanding, terms indicating directions (e.g., "up," "down," "right," "left," "front," or "rear") are used as appropriate, but these notations are written in this way only for the convenience of explanation and do not limit the arrangement and orientation of devices or parts.

[0012] Embodiment 1 [Chilling Unit 100] FIG. 1 is a perspective view of the chilling unit 100 according to the first embodiment. FIG. 2 is a side view of the chilling unit 100 according to the first embodiment. FIG. 3 is a front view of the chilling unit 100 according to the first embodiment. FIG. 3 is a front view of the chilling unit 100 as viewed in the direction of the outlined arrow in FIG. 1. The overall image of the chilling unit 100 will be described with reference to FIGS. 1 to 3. The X-axis shown in the following drawings including FIG. 1 indicates the longitudinal direction of the chilling unit 100, the Y-axis indicates the width direction or left-right direction of the chilling unit 100, and the Z-axis indicates the up-down direction of the chilling unit 100. In addition, the positional relationship between the respective components (e.g., the up-down relationship, etc.) in the specification is, in principle, when the chilling unit 100 is installed in a usable state.

[0013] The chilling unit 100 is used, for example, as a heat source device for a chiller device. The chilling unit 100 is supplied with a heat transfer fluid such as water or antifreeze from a load side unit (not shown), and the heat transfer fluid is cooled or heated in the chilling unit 100 and sent to the load side unit. The chilling unit 100 supplies cold or hot heat to the load side unit by circulating the heat transfer fluid in this manner.

[0014] The chilling unit 100 is formed in an elongated shape, and has an air heat exchanger 1, a fan 5, and a machine room unit 4 that constitute a refrigeration cycle on the heat source side.

[0015] (Air heat exchanger 1) The air heat exchanger 1 exchanges heat between the refrigerant flowing inside and the outside air, and functions as an evaporator or a condenser. The air heat exchanger 1 has a plurality of heat transfer tubes 7 and a plurality of fins 8. The air heat exchanger 1 is, for example, a parallel flow type heat exchanger, and has a pair of headers (not shown), a plurality of heat transfer tubes 7, and a plurality of fins 8. The heat transfer tubes 7 are, for example, aluminum flat tubes, and the fins 8 are, for example, corrugated fins. Note that the air heat exchanger 1 is not limited to the parallel flow type heat exchanger. The air heat exchanger 1 may be, for example, a fin-and-tube type heat exchanger in which a plurality of plate-shaped fins 8 are arranged in parallel and the heat transfer tube 7 penetrates the plurality of fins 8. The air heat exchanger 1 has four air heat exchangers 1, namely, an air heat exchanger 1A, an air heat exchanger 1B, an air heat exchanger 1C, and an air heat exchanger 1D. The air heat exchanger 1A is the first air heat exchanger, the air heat exchanger 1B is the second air heat exchanger, the air heat exchanger 1C is the third air heat exchanger, and the air heat exchanger 1D is the fourth air heat exchanger.

[0016] In the short-side direction (Y-axis direction) of the machine room unit 4, the air heat exchanger 1A and the air heat exchanger 1B are arranged to face each other. A pair of air heat exchangers 1 consisting of the air heat exchanger 1A and the air heat exchanger 1B are arranged to be inclined so that the upper interval SP1 between the upper end portions 11a on the side farther from the machine room unit 4 is larger than the lower interval SP2 between the lower end portions 11b on the side closer to the machine room unit 4. That is, the air heat exchanger 1A and the air heat exchanger 1B are arranged to be inclined so as to form a V shape when viewed from the front of the chilling unit 100 as shown in FIG. 3. In the short-side direction (Y-axis direction) of the machine room unit 4, the air heat exchanger 1C and the air heat exchanger 1D facing each other are also arranged to be inclined so as to form a V shape. In the first embodiment, the inclination angle α of the air heat exchanger 1A is, for example, 65° to 80°. Air heat exchanger 1B, air heat exchanger 1C, and air heat exchanger 1D are arranged so that their inclination angles are 65° to 80°, similar to air heat exchanger 1A.

[0017] A top frame 60 is provided above the air heat exchanger 1A, the air heat exchanger 1B, the air heat exchanger 1C, and the air heat exchanger 1D. The top frame 60 constitutes the upper wall of the chilling unit 100. The top frame 60 is fixed to the machine room unit 4 by support columns 70. The support columns 70 are provided at both ends of the chilling unit 100 in the longitudinal direction (X-axis direction). Two support columns 70 are arranged at each end of the chilling unit 100 in the longitudinal direction (X-axis direction). The two support columns 70 are arranged to extend in the vertical direction, and are arranged with a gap between them in the short direction (Y-axis direction). The upper end of the support column 70 is fixed to the top frame 60, and the lower end is fixed to the machine room unit 4.

[0018] A side panel 50 is arranged on one side of the chilling unit 100 in the short-side direction (Y-axis direction) of the chilling unit 100 so as to cover the space between the air heat exchanger 1A and the air heat exchanger 1C. The side panel 50 is a plate-like panel formed in a substantially rectangular shape. The side panel 50 is provided so as to extend in the vertical direction (Z-axis direction) and the longitudinal direction (X-axis direction). The side panel 50 is arranged along the inclination of the air heat exchanger 1 described above. Note that a side panel 50 is also arranged on the other side of the chilling unit 100 in the short-side direction (Y-axis direction) of the chilling unit 100 so as to cover the space between the air heat exchanger 1B and the air heat exchanger 1D.

[0019] A side panel 51 is disposed on one side of the chilling unit 100 in the longitudinal direction (X-axis direction) so as to cover the space between the air heat exchanger 1A and the air heat exchanger 1B. The side panel 51 is a plate-shaped panel formed in a substantially trapezoidal shape. The side panel 51 is formed such that an upper edge 51a is longer than a lower edge 51b. The side panel 51 is provided so as to extend in the vertical direction (Z-axis direction) and the short direction (Y-axis direction). The side panel 51 is disposed in the longitudinal direction (X-axis direction) of the chilling unit 100 so as to cover a part of the ends of the air heat exchanger 1A and the air heat exchanger 1B. Note that a side panel 51 is also disposed on the other side of the chilling unit 100 in the longitudinal direction (X-axis direction) so as to cover the space between the air heat exchanger 1C and the air heat exchanger 1D. The side panel 51 is disposed in the longitudinal direction (X-axis direction) of the chilling unit 100 so as to cover a portion of the ends of the air heat exchanger 1C and the air heat exchanger 1D.

[0020] (Fan 5) The above-mentioned fans 5 are provided on the top frame 60. The fans 5 form a flow of air that passes through the air heat exchanger 1 and is discharged from an air outlet 14 such as a bellmouth 6A described below. The fans 5 are air blowing means equipped with an axial flow fan, and generate an air flow for efficient heat exchange in the air heat exchanger 1. The fans 5 include four fans 5A, 5B, 5C, and 5D.

[0021] Furthermore, a bellmouth 6A, a bellmouth 6B, a bellmouth 6C, and a bellmouth 6D are provided in the top frame 60. Fans 5A, 5B, 5C, and 5D are disposed inside the bellmouth 6A, 6B, 6C, and 6D, respectively.

[0022] An air outlet 14 is formed at the upper end of the bellmouth 6A, bellmouth 6B, bellmouth 6C, and bellmouth 6D. The chilling unit 100 is of a "top flow type" in which the blowing side of the fan 5 faces upward. A fan guard 17 is provided at the air outlet 14 of the bellmouth 6A, bellmouth 6B, bellmouth 6C, and bellmouth 6D, and the fan 5A, fan 5B, fan 5C, and fan 5D are each covered by the fan guard 17.

[0023] FIG. 4 is a conceptual diagram showing the structure of the machine room unit 4 shown in FIG. 1. In FIGS. 1 and 4, the space occupied by the machine room unit 4 is indicated by dotted lines. The structure of the machine room unit 4 will be explained with reference to FIGS. 1 and 4. The machine room unit 4 is formed in a long box shape, and is formed in a rectangular parallelepiped shape. The machine room unit 4 has frames 40 formed in a rectangular parallelepiped shape, and side walls 45 that cover the spaces between the frames 40.

[0024] The frame 40 has an underframe 41, gate posts 42, intermediate posts 43, and an upper beam 44. The gate posts 42 include four gate posts 42A, 42B, 42C, and 42D. The intermediate posts 43 include four intermediate posts 43A, 43B, 43C, and 43D. The underframe 41 is formed in a rectangular shape in a plan view, and constitutes the bottom of the frame 40.

[0025] The gate posts 42A, 42B, 42C, and 42D are provided at the four corners of the underframe 41 so as to extend in a direction perpendicular to the underframe 41. The intermediate posts 43A and 43B are provided at a distance between the gate posts 42A and 42C in the longitudinal direction (X-axis direction) of the underframe 41. The intermediate posts 43C and 43D are provided at a distance between the gate posts 42B and 42D in the longitudinal direction (X-axis direction) of the underframe 41. The intermediate posts 43A, 43B, 43C, and 43D are provided so as to extend in a direction perpendicular to the underframe 41. The upper beam 44 is provided on the gate posts 42A, 42B, 42C, and 42D, as well as the intermediate posts 43A, 43B, 43C, and 43D. Note that the structure of the frame 40 described above is an example, and is not limited to the above configuration as long as the machine room unit 4 is formed in a rectangular parallelepiped shape.

[0026] A base 10 is provided on the upper beam 44 of the machine room unit 4. The base 10 is supported by the gate pillar 42 and the intermediate pillar 43. The above-mentioned air heat exchanger 1A, air heat exchanger 1B, air heat exchanger 1C, and air heat exchanger 1D are arranged on the base 10. That is, the plurality of air heat exchangers 1 are placed on the upper part of the machine room unit 4. A drain pan 55 is provided on the upper part of the machine room unit 4. The drain pan 55 receives water droplets drained from the air heat exchanger 1. The drain pan 55 is arranged below the air heat exchanger 1 to receive water droplets falling from the air heat exchanger 1. The drain pan 55 is provided so as to extend in the longitudinal direction (X-axis direction) of the machine room unit 4. The drain pan 55 collects water droplets that naturally flow down from the air heat exchanger 1 due to gravity as drain water and leads them to a discharge port (not shown).

[0027] The side wall 45 has a first side wall 45a arranged at both ends of the machine room unit 4 in the longitudinal direction (X-axis direction), and a machine room panel 45b arranged at both ends of the machine room unit 4 in the lateral direction (Y-axis direction). The first side wall 45a is a plate-shaped side wall provided to extend in the vertical direction (Z-axis direction) and the lateral direction (Y-axis direction). The first side wall 45a is arranged to cover the space formed between the gatepost 42A and the gatepost 42B. The first side wall 45a is also arranged to cover the space formed between the gatepost 42C and the gatepost 42D. The machine room panel 45b is a side wall provided to extend in the vertical direction (Z-axis direction) and the longitudinal direction (X-axis direction). The machine room panel 45b is arranged to cover the space formed between the gatepost 42A and the intermediate column 43A, the space formed between the intermediate column 43A and the intermediate column 43B, and the space formed between the intermediate column 43B and the gatepost 42C. In addition, the machine room panel 45b is arranged to cover the space formed between the gate post 42B and the intermediate post 43C, the space formed between the intermediate post 43C and the intermediate post 43D, and the space formed between the intermediate post 43D and the gate post 42D.

[0028] 5 is a plan view showing a schematic internal structure of the machine room unit 4 shown in FIG. 1. The machine room unit 4 contains a compressor 31, a flow path switching device 33, a heat exchanger 3, and a pressure reducing device (not shown). The compressor 31, the flow path switching device 33, the heat exchanger 3, the pressure reducing device, and the air heat exchanger 1 are connected in series by refrigerant piping to form a refrigerant circuit. The heat exchangers 3 of the chilling units 100 are connected in parallel by water piping, and the heat transfer fluid in the water piping is circulated to the load side unit (not shown) by passing through the heat exchanger 3 by a pump unit (not shown). The devices installed in the machine room unit 4 include a control box 32.

[0029] The compressor 31 draws in a refrigerant in a low-temperature, low-pressure state, compresses the drawn-in refrigerant, and discharges it into a refrigerant in a high-temperature, high-pressure state. The flow path switching device 33 is, for example, a four-way valve, and switches the flow path of the refrigerant under the control of a control device (not shown). The heat exchanger 3 exchanges heat between the refrigerant and a heat transfer fluid such as water or antifreeze. The pressure reducing device is, for example, an expansion valve, and reduces the pressure of the refrigerant. The control box 32 houses therein, for example, a control board that controls the flow path switching device 33, a control board that controls the opening degree of the pressure reducing device, or an inverter board that controls the rotation speed of the compressor 31.

[0030] The machine room unit 4 may have a heater 57. When the chilling unit 100 is operated in a cold region, the disposal of remaining ice in the drain pan 55 may be a problem. Since the chilling unit 100 has the heater 57, the ice in the drain pan 55 can be melted by using the heater 57 during operation in a cold region, or the drain water can be prevented from freezing. When the machine room unit 4 has the heater 57, the heater 57 is disposed near the air heat exchanger 1. For example, the heater 57 is disposed above the drain pan 55 so as to extend in the longitudinal direction (X-axis direction) of the machine room unit 4 along the lower end portion 11b of the air heat exchanger 1.

[0031] [Chilling Unit 100 Operation] The chilling unit 100 causes the outside air to pass through the air heat exchanger 1 by the fan 5, thereby exchanging heat between the air and the refrigerant in the air heat exchanger 1, and discharges the air after the heat exchange from above. The chilling unit 100 can switch between a cooling operation in which the air heat exchanger 1 functions as a condenser and the heat exchanger 3 functions as an evaporator, and a heating operation in which the air heat exchanger 1 functions as an evaporator and the heat exchanger 3 functions as a condenser, by switching the flow path switching device 33. In the cooling operation, a heat transfer fluid cooled by the heat exchanger 3 is generated, and for example, this cooled heat transfer fluid is supplied to a load side unit (not shown) to cool the air on the load side (indoor side), thereby cooling the room. In the heating operation, a heat transfer fluid warmed by the heat exchanger 3 is generated, and for example, this warmed heat transfer fluid is supplied to a load side unit (not shown) to heat the air on the load side (indoor side), thereby heating the room.

[0032] [Machine room unit 4] FIG. 6 is a conceptual diagram showing the relationship between the air heat exchanger 1 and the machine room unit 4 of the chilling unit 100 according to the first embodiment. In FIG. 6, in order to explain the relationship between the air heat exchanger 1 and the machine room unit 4, some components such as the support column 70 are omitted. Here, in the short-side direction (Y-axis direction) of the chilling unit 100, the width between the side walls of the upper surface 24a of the machine room unit 4 is defined as the upper width WA1. And, the width between the outer surfaces of the lower end portion 11b of the pair of air heat exchangers 1 consisting of the air heat exchanger 1A and the air heat exchanger 1B is defined as the heat exchanger lower width WB. As described above, the air heat exchanger 1A and the air heat exchanger 1B are arranged opposite each other in the short-side direction (Y-axis direction) of the machine room unit 4. As shown in FIG. 6, the chilling unit 100 is formed so that the upper width WA1 is larger than the heat exchanger lower width WB. That is, the chilling unit 100 is formed so that the upper width WA1>the heat exchanger lower width WB.

[0033] The chilling unit 100 is formed so that the difference between the upper width WA1 and the lower width WB of the heat exchanger is within 50 mm. In other words, the chilling unit 100 is formed so that 0 mm<upper width WA1-lower width WB of the heat exchanger≦50 mm.

[0034] Furthermore, in the short-side direction (Y-axis direction) of the machine room unit 4, the width between the side walls at the bottom surface portion 24b of the machine room unit 4 is defined as the lower width WA2. Also, in the up-down direction (Z-axis direction) perpendicular to the long-side direction (X-axis direction) and short-side direction (Y-axis direction) of the machine room unit 4, the dimension between the upper surface portion 24a and the bottom surface portion 24b of the machine room unit 4 is defined as the height dimension HC. In this case, the machine room unit 4 may be formed so that the upper width WA1, the lower width WA2, and the height dimension HC are equal. In other words, the machine room unit 4 may be formed so that the upper width WA1 and the lower width WA2 are equal, and the upper width WA1, the lower width WA2, and the height dimension HC are equal. In other words, the chilling unit 100 may be formed so that (upper width WA1 = lower width WA2) = height dimension HC.

[0035] The chilling unit 100 is formed so that the upper width WA1 of the machine room unit 4 is larger than the lower heat exchanger width WB of the pair of air heat exchangers 1. However, the upper width WA1 may be the same as the lower heat exchanger width WB. The machine room unit 4 of the chilling unit 100 is covered in the Y direction with a machine room panel 45b. The machine room panel 45b closes the opening surrounded by the underframe 41, the gate post 42, the intermediate post 43, and the upper beam 44 shown in FIG. 4, and protects the equipment inside the machine room unit 4. The machine room panel 45b is arranged so as to close each of the multiple openings shown in FIG. 4. Therefore, in the first embodiment, three machine room panels 45b are attached to each of both end faces in the Y direction of the machine room unit 4 shown in FIG. 4.

[0036] FIG. 7 is a front view of a chilling unit 100L which is a modified example of the chilling unit 100 according to the first embodiment. In the short-side direction (Y-axis direction) of the chilling unit 100L, the width between the side walls at the upper surface 24a of the machine room unit 4 is defined as an upper width LWA1. The width between the outer surfaces of the lower end 11b of a pair of air heat exchangers 1 consisting of the air heat exchanger 1A and the air heat exchanger 1B is defined as a heat exchanger lower width LWB. In the short-side direction (Y-axis direction) of the machine room unit 4, the width between the side walls at the bottom surface 24b of the machine room unit 4 is defined as a lower width LWA2. Furthermore, in the vertical direction (Z-axis direction) of the machine room unit 4, the dimension between the upper surface 24a and the bottom surface 24b of the machine room unit 4 is defined as a height dimension LHC. The chilling unit 100L is formed so that the upper width LWA1 of the machine room unit 4 and the heat exchanger lower width LWB of the pair of air heat exchangers 1 are equal in size. In the chilling unit 100L, the width LWA1 at the top of the machine room unit 4 is equal to the width LWB at the bottom of the heat exchangers of the pair of air heat exchangers 1, so there is less room in the machine room unit 4 than in the chilling unit 100. Therefore, in the chilling unit 100L, the freedom of arrangement of devices constituting the refrigerant circuit, such as the compressor 31, or of piping arrangement, is restricted.

[0037] Fig. 8 is an enlarged perspective view of the periphery of the machine room panel 45b of the chilling unit 100 according to embodiment 1. Fig. 9 is a cross-sectional view of the machine room unit 4 of the chilling unit 100 according to embodiment 1. Fig. 10 is a three-sided view of the machine room panel 45b alone. Fig. 11 is a rear view of the machine room panel 45b. The machine room panel 45b of the chilling unit 100 according to embodiment 1 is a panel that forms the end face of the machine room unit 4 in the Y direction.

[0038] As shown in Fig. 9, the machine room panel 45b has a flat panel body 46 that covers the opening of the machine room unit 4. The panel body 46 has a heat insulating member 49 fixed to a surface facing the inside of the machine room unit 4. The heat insulating member 49 has an outer peripheral end face 49a formed in a rectangular shape and is formed to a uniform thickness overall. The outer peripheral end face 49a of the heat insulating member 49 is disposed along the outer edge of the panel body 46. Therefore, the panel body 46 is covered with the heat insulating member 49 of a uniform thickness over substantially the entire area.

[0039] 10, the machine room panel 45b includes fixing parts 48A, 48B, and 48C fixed to the underframe 41, the gate post 42, the intermediate post 43, and the upper beam 44, and the panel body 46 is disposed at a position away from the fixing parts 48A, 48B, and 48C in the Y direction. The machine room panel 45b also includes connection parts 47A, 47B, and 47C that connect the outer edge of the panel body 46 to the fixing parts 48A, 48B, and 48C. The connection part 47A connects the fixing part 48A located below the chilling unit 100 to the panel body 46, and is specifically referred to as the lower connection part 47A.

[0040] The connection parts 47B and 47C located on the upper side and both horizontal ends of the machine room panel 45b are raised at an angle close to perpendicular to the fixing parts 48B, 48C and the panel main body 46. On the other hand, the lower connection part 47A is formed with a large inclination angle θ relative to the fixing parts 48A, 48B, 48C and the panel main body 46. The inclination angle θ is the inclination angle relative to the plane of the fixing parts 48A, 48B, 48C and the panel main body 46, in other words, it is also the inclination angle relative to the vertical plane.

[0041] As shown in FIG. 11, the machine room panel 45b has a heat insulating member 49 disposed above the lower connection portion 47A. The machine room panel 45b has a panel body 46 disposed at a position protruding toward the outside of the machine room unit 4 relative to the fixing portions 48A, 48B, and 48C, and therefore has a large surface area and tends to have a larger amount of condensation than a conventional panel made of a simple flat plate. The machine room panel 45b according to the first embodiment has a lower connection portion 47A inclined downwards, so that even if water condensed inside the machine room unit 4 flows down along the panel body 46, the condensed water is prevented from accumulating. This prevents water from accumulating at the bottom of the machine room panel 45b and causing corrosion. In addition, the appearance is prevented from being damaged by rust.

[0042] The machine room panel 45b is fastened and fixed in a state where the fixing parts 48A, 48B, and 48C are abutted against the underframe 41, the gatepost 42, the intermediate post 43, and the upper beam 44 of the machine room unit 4, and the bolts 91, 92, 93, and 94 are inserted into the bolt insertion holes 98 and the bolt insertion notches 97. At this time, the bolt 92 fixing the fixing part 48A located at the lower part of the machine room panel 45b is configured so that it can be seen from diagonally above because the lower connection part 47A is inclined. In the first embodiment, for example, the protrusion amount P from the fixing parts 48A, 48B, and 48C of the panel main body 46 is set to 30 mm, and the inclination angle θ of the lower connection part 47A with respect to the vertical direction is set to 50° or less.

[0043] FIG. 12 is a perspective view of the chilling unit system 110 according to the first embodiment. FIG. 13 is a conceptual diagram showing the relationship between two adjacent chilling units 100 constituting the chilling unit system 110 according to the first embodiment. As shown in FIG. 12, the chilling unit system 110 has a plurality of chilling units 100. The chilling unit system 110 is configured by arranging a plurality of chilling units 100 in parallel in the short side direction (Y-axis direction). The chilling unit system 110 is installed so that the longitudinal directions (X-axis direction) of the plurality of chilling units 100 are parallel to each other. As shown in FIG. 13, in the chilling unit system 110, the interval W between the machine room units 4 of two adjacent chilling units 100 in the short side direction (Y-axis direction) of the chilling units 100 is set to 350 mm or more. The interval W is the interval between the outer surfaces of the panel bodies 46 of the machine room panels 45b. This interval W is set in consideration of the maintainability of the plurality of chilling units 100.

[0044] The space between the two chilling units 100 is also used as a space where workers can enter and work when performing maintenance on the chilling units 100. A machine foundation 95 is formed on the floor surface 96 of the space, and the chilling units 100 are installed on the machine foundation 95. The height h1 of the machine foundation 95 is set to about 200 mm. The height H of the machine room unit 4 is set to be 650 mm or more from the floor surface 96. The height of the machine room unit 4 is set so that the equipment to be placed inside the machine room unit 4 can be accommodated, and is set so that when the chilling units 100 are lined up as shown in Figures 12 and 13, a space is secured between the chilling units 100 so that workers can enter and perform maintenance work. Generally, the height required for a worker to bend down and work is 650 mm or more, and the height H of the machine room unit 4 from the floor surface 96 is secured to be 650 mm or more. To secure the height H, the height of the machine foundation 95 may be changed. In addition, in order for an operator to enter the space between the two chilling units 100, it is desirable to ensure a width W of 350 mm or more.

[0045] A case will be described where an operator enters the space between two chilling units 100 to remove the machine room panel 45b. As shown in Fig. 9, in the chilling unit system 110 according to the first embodiment, the height h of the bolt 94 of the fixing part 48A located at the lower end of the machine room panel 45b of the chilling unit 100 is, for example, 277 mm from the floor surface 65. Assuming that the starting point B on the fixing part 48A side of the lower connecting part 47A is as close as possible to the bolt 94, the inclination angle θ of the lower connecting part 47A is set to at least 50° or less, so that the operator can remove the bolt 94 while visually checking it in a normal working position (naturally crouching down).

[0046] FIG. 14 is an explanatory diagram of the relationship between the line of sight of the worker and the lower connection part 47A in the first embodiment. In order to make the bolt 94 visible when viewed from the worker's viewpoint E, it is necessary to set the inclination angle θ of the lower connection part 47A within an appropriate range according to the height H of the viewpoint E and the distance w from the machine room panel 45b. Here, the position of the worker's viewpoint E in normal maintenance work is at a height H from the floor surface 96 at the upper end of the machine room unit 4. This is because the air heat exchanger 1 is arranged at the top of the chilling unit 100 protruding from the machine room unit 4 at an inclination angle φ, and the worker needs to work by bending down accordingly. For example, the position of the worker's viewpoint E is H-h1=650mm-277mm=373mm, w=300mm. And, if the starting point B of the lower connection part 47A is as close as possible to the bolt 94, the inclination angle θ of the lower connection part 47A is θ≦tan -1 {w / (H-h1)}···(1) satisfies the condition θ≦39°, the bolt 94 can be seen from the viewpoint E. In other words, by setting the machine room panel 45b so that θ≦39°, the bolt 94 is not hindered from being seen by an operator during normal work.

[0047] As shown in FIG. 13, the interval W between adjacent chilling units 100 depends on the inclination angle φ of the air heat exchanger 1, and is expressed as W=2Lsinφ. Here, L is the dimension in the direction along the inclination of the air heat exchanger 1, and φ is the inclination angle of the air heat exchanger 1 with respect to the vertical direction. Alternatively, the interval W between adjacent chilling units 100 is set to W≧2Lsinθ, taking into account the gap at the top of the chilling units 100. Therefore, if a worker enters the space between the chilling units 100 and sets the position of the viewpoint E when working at a position approximately half the distance W, the worker can work with ease. Therefore, the position w of the viewpoint E in FIG. 14 is replaced by W / 2, and the inclination angle θ of the lower connection portion 47A is set to θ≦tan -1 Setting it to {Lsinφ / (H-h1)} makes it easier for the worker to visually check the bolts 94, improving workability. Note that since the inclination angle α of the air heat exchanger 1 shown in Fig. 3 is 65° to 80°, the inclination angle φ is 10° to 25°. In addition, the dimension of the air heat exchanger 1 along the inclination direction is, for example, 1400 mm.

[0048] Further, the machine room panel 45b has a protruding amount P of the panel body 46 set to, for example, about 30 mm. This allows the machine room panel 45b to fix the heat insulating member 49 of a uniform thickness to the inner surface of the panel body 46. When the machine room unit 4 is covered with a conventional simple flat side wall, the heat insulating member 49 is partially cut out or has holes to avoid contact with the equipment inside the machine room unit 4. However, the machine room panel 45b according to the first embodiment is disposed at a position where the panel body 46 protrudes in the Y direction from the fixing parts 48A, 48B, and 48C, so that it is not necessary to match the heat insulating member 49 with the internal structure of the machine room unit 4. Therefore, all three machine room panels 45b shown in FIG. 2 have the same structure, and it is not necessary to manage the respective mounting positions when removing and mounting them during maintenance work.

[0049] By appropriately setting the protrusion amount P of the panel body 46, the machine room panel 45b can increase the installation area of ​​the equipment inside the housing without increasing the size of the machine room unit 4 in the Y direction, i.e., the distance between the frames 41 in the Y direction. Since the machine room panel 45b is removed during maintenance work, the protrusion amount P does not narrow the work space, and the maintenance work can be performed without problems as long as the visibility of the bolts 94 when removing the machine room panel 45b is ensured. For example, the protrusion amount P of the panel body 46 may be set to P≧30 mm, taking into consideration that a heat insulating member 49 of uniform thickness is installed inside substantially the entire area of ​​the panel body 46 and equipment is installed inside the machine room unit 4.

[0050] Furthermore, the chilling unit 100 according to the first embodiment is usually used in a plurality of units arranged side by side as shown in Fig. 12. However, even when a single chilling unit 100 is installed, the inclined lower connection portion 47A of the machine room panel 45b can suppress corrosion and improve the workability of removing and installing the machine room panel 45b.

[0051] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Also, parts of the configurations may be omitted or modified without departing from the gist of the present disclosure. [Explanation of symbols]

[0052] 1 air heat exchanger, 1A air heat exchanger, 1B air heat exchanger, 1C air heat exchanger, 1D air heat exchanger, 3 heat exchanger, 4 machine room unit, 5 fan, 5A fan, 5B fan, 5C fan, 5D fan, 6A bell mouth, 6B bell mouth, 6C bell mouth, 6D bell mouth, 7 heat transfer tube, 8 fin, 10 base, 11a upper end, 11b lower end, 14 air outlet, 17 fan guard, 24a upper surface portion, 24b bottom surface portion, 31 compressor, 32 control box, 33 flow path switching device, 40 frame, 41 base frame, 42 gate post, 42A gate post, 42B gate post, 42C gate post, 42D gate post, 43 intermediate post, 43A intermediate post, 43B intermediate post, 43C Intermediate column, 43D intermediate column, 44 upper beam, 45 side wall, 45a first side wall, 45b machine room panel, 46 panel body, 47A (lower) connection part, 47B connection part, 47C connection part, 48A fixing part, 48B fixing part, 48C fixing part, 49 heat insulating member, 49a end face, 50 side panel, 51 side panel, 51a upper edge part, 51b lower edge part, 52 machine room panel, 55 drain pan, 57 heater, 60 top frame, 65 floor surface, 70 support column, 91 bolt, 92 bolt, 93 bolt, 94 bolt, 95 machine foundation, 96 floor surface, 97 bolt insertion notch, 98 bolt insertion hole, 100 chilling unit, 100C chilling unit, 100L chilling unit, 110 Chilling unit system.

Claims

1. A machine room unit formed in a long box shape and accommodating a compressor and a heat exchanger therein; a plurality of air heat exchangers that configure a refrigerant circuit together with the compressor and the heat exchanger and are mounted on an upper portion of the machine room unit; Among the plurality of air heat exchangers, a pair of air heat exchangers arranged opposite to each other in the short side direction of the machine room unit are the upper ends of the casings are inclined such that the distance between the upper ends of the casings on the side farther from the machine room unit is greater than the distance between the lower ends of the casings on the side closer to the machine room unit; The machine room panel constituting the short side surface of the machine room unit is A panel body located at a center portion of the machine room panel; a fixing portion connected to the periphery of the panel body and abutting and fixed to the machine room unit; The panel body includes: The fixing portion is disposed so as to protrude toward the outside of the machine room unit, The fixing portion is a lower end fixing portion located at a lower end of the machine room panel, The lower end fixing portion is The panel body is connected to a lower end connection portion, The lower end connection portion is A chilling unit that is inclined downward from the panel body toward the lower end fixing portion.

2. The lower end connection portion is When the dimension L of the air heat exchanger in the direction along the inclination, the inclination angle φ of the air heat exchanger with respect to the vertical direction, the height H from the floor surface on which the chilling unit is installed to the upper end of the machine room unit, the height h1 from the floor surface to the bolts fixing the lower end connection part, and the inclination angle θ of the lower end connection part with respect to the vertical direction are specified, θ≦tan －１ {(H-h1) / Lsinφ} ・・・(1) The chilling unit according to claim 1 ,

3. The height h from the floor surface to the upper end of the machine room unit is 650 mm or more, The chilling unit according to claim 2 , wherein the inclination angle θ of the lower end connection portion is 39° or less.

4. The chilling unit according to any one of claims 1 to 3, further comprising a heat insulating member fixed to a surface of the panel body facing inwardly of the machine room unit.

5. The heat insulating member is The chilling unit according to claim 4, which is formed into a rectangular shape of uniform thickness and has an outer peripheral end surface disposed along an outer edge of a surface of said panel body facing inward of said machine room unit.

6. A chilling unit system comprising a plurality of chilling units according to any one of claims 1 to 5, A chilling unit system in which the distance between the machine room units of two adjacent chilling units in the short direction is set to 350 mm or more.

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