JP6366618B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling device attached to a wall surface such as a ceiling surface.

  In Patent Document 1, in order to ensure a necessary air flow rate in the limited dimensional constraints made thin in Patent Document 2, an air suction port to the air blowing fan is provided on the lower surface of the unit body. A blower fan that rotates around the vertical axis is installed facing the air suction port, and an evaporator is arranged downstream of the blower fan to blow cooling air from the front of the unit. The unit example which employ | adopted the air path structure of a blowing is shown, and it describes that this air path structure is common as a refrigeration unit of the type suspended and installed in a ceiling surface. Further, Patent Document 1 points out the following problems with respect to the above-described air passage structure.

  (1) In refrigerated transport, moisture in the outside air that has entered the cabinet when the refrigerator door is opened and closed (when loading and unloading) is rapidly cooled to form small ice crystals inside the refrigerator. It is floating. On the other hand, a fan guard (suction grill) having relatively fine eyes or gaps is provided at the air suction port of the refrigeration unit so that foreign matter, hands, fingers and the like do not enter, and this serves as air suction resistance. Further, when ice crystals in the air are sucked into the refrigeration unit, they collide with and adhere to the fan guard and grow and accumulate as frost. If the opening of the air suction port is reduced or partially blocked by the frost, the air volume is reduced, which may cause performance deterioration and capacity reduction, and may cause poor cooling.

  (2) In addition, the frost accumulated as described above is partially melted when the evaporator and drain pan are defrosted, but when the molten water is dripped downward from the air suction port, it is dripped onto the luggage. As a result, the quality of the package is reduced or damaged.

  (3) Although the refrigeration unit itself can have a thin structure, between the lower surface of the refrigeration unit and the cargo loaded below it, the air inside the compartment is guided to the air suction port provided on the lower surface of the refrigeration unit. It is necessary to load a load so that an air flow path is secured. For this reason, when the space that forms the air flow path is subtracted, the effective loadable volume that can actually load the load cannot be increased as expected.

  On the other hand, in patent document 1, while being able to take an air suction opening large enough, it can suppress that condensed water and the melting water of frost are dripped on a load from a unit side, and effective of a load It is described that the object is to provide a transport refrigeration unit capable of increasing the loadable volume. For this reason, in Patent Document 1, in a transport refrigeration unit in which a unit main body having an evaporator and a blower fan is suspended from a ceiling surface of a refrigerator, a part of the unit main body is vertically moved in the unit thickness direction. It has a two-layer structure, one of which is an air suction channel and the other is an air blowing channel. Between the air suction channel and the air blowing channel, air is sucked in from the air suction channel side, A blower fan that blows out to the road side is disposed, and an air suction port to the air suction channel is provided on one side surface of the unit main body.

JP 2008-202912 A JP 2001-82858 A

  Further, there is a demand for a compact cooling device that can take a sufficiently large air intake.

  One embodiment of the present invention is a cooling device attached to a wall surface. This cooling device has an air intake port facing the wall surface and a blow-out port for blowing out the cooled air along the wall surface. In this cooling device, the air intake port faces the wall surface to which the cooling device is attached, for example, the ceiling surface and the side wall surface. For this reason, even if it is a thin cooling device, it is easy to enlarge compared with providing an air intake in a side surface. Furthermore, since the foreign material, hands, fingers and the like are difficult to enter from the air intake port by directing the air intake port to the wall surface, obstacles such as a suction grill can be omitted or minimized. For this reason, the opening area (opening ratio) of the air intake port can be increased, and a reduction in air volume due to frost formation, icing, or the like can be suppressed.

  Further, in this cooling device, air can be taken in if a flow path is secured along the wall surface. For this reason, if it is a cooling device attached to the ceiling surface, not only the lower side of the cooling device but also the side surface can be loaded (loaded) up to the vicinity of the cooling device, and the cooling device is installed. Space can be used more effectively.

  The cooling device may include a housing including a first flat portion attached to the wall surface and a second flat portion which is retracted from the first flat portion and provided with an intake port. The entire wall surface side of the cooling device may be attached so as to be separated from the wall surface. However, by providing a first flat portion that can be directly attached to the wall surface, the first flat portion can be attached to the rear surface, for example, the ceiling surface. It is possible to provide a cooling device that expands the space in the lower housing of the unit or more closely contacts the ceiling surface. The cooling device includes an evaporator housed in a first portion below the first flat portion of the housing, and a suction fan housed in a second portion below the second flat portion of the housing. You may have. Moreover, since the 1st flat part closely_contact | adheres to a wall surface, a 1st part may be sealed with a wall surface via packing.

  A preferred example of the wall surface to which the cooling device is attached is a ceiling surface. The housing of the cooling device may include a lower housing in which a bottom wall and a peripheral wall are integrally formed and also serves as a drain pan. Since the air intake port faces the ceiling surface, the bottom wall and the peripheral wall of the housing are basically free of drainage except at the lower peripheral wall, except for the drainage. A cooling device that is less likely to leak can be provided.

  Furthermore, the housing may include a convex portion provided at the boundary between the first portion and the second portion on the bottom surface of the housing. The second part of the housing in which the intake port is provided facing the ceiling surface can be disposed below the first part attached to the ceiling surface, and the drain is provided in the second part on the opposite side to the outlet. Easy to save. Furthermore, the convex part can control the flow of the drain between the first part where the evaporator is installed and the second part where the fan is installed. An example of a fan is a turbo fan that is easy to secure both air volume and wind pressure.

  Another aspect of the present invention is a vehicle in which the above cooling device is mounted on a ceiling.

The side view which shows the outline | summary of the vehicle with which the cooling device was mounted | worn on the ceiling. Sectional drawing which shows the structure inside a cooling device. The perspective view which shows schematic structure of a cooling device. The top view which shows the structure inside a cooling device. The perspective view which shows the structure of the lower part of a housing.

  FIG. 1 is a perspective view showing a schematic configuration of a vehicle in which a cooling device is mounted on the ceiling of a luggage compartment. The vehicle 1 has a cargo compartment (cooling compartment, freezer) 2 that stores and transports the cargo in a cooled (frozen) state, and a cooling system 10 that controls the temperature of the cargo compartment 2. The cooling system 10 includes a cooling device (indoor unit) 20 attached to the ceiling 3 of the cargo compartment 2, an outdoor unit 11 disposed outside the cooler 2, and refrigerant between the cooling device 20 and the outdoor unit 11. And a circulating piping system 13. The cooling device 20 includes an evaporator 21 and a fan 22. The outdoor unit 11 includes a condenser 14 and a compressor 12. The compressor 12 may be disposed in another place such as an engine room.

  The cooling device 20 is located behind the housing 60 attached to the ceiling surface 3 of the cargo compartment 2 at the rear of the vehicle, and the forward direction of the cool air 6 is hereinafter referred to as the ceiling surface of the cargo compartment 2 ( An air inlet 34 facing the wall surface 3, and an air outlet 41 that blows air (cool air) 6 cooled from the front of the housing 60 along the ceiling surface 3 forward. The attachment method of the cooling device 20 is not limited to this example, and the blowing direction of the cold air 6 may be rearward or lateral. The cooling device 20 cools the air (intake air) 5 sucked by the fan 22 from the air intake 34 facing the ceiling surface 3 by the evaporator 21, and blows the cool air 6 along the ceiling surface 3.

  FIG. 2 shows the cooling device 20 in an enlarged manner. In FIG. 2, the internal configuration of the cooling device 20 is shown by a cross-sectional view. FIG. 3 is a perspective view showing a schematic configuration of the cooling device 20. FIG. 4 is a plan view showing the internal configuration of the cooling device 20 with the upper housing 30 removed.

  The cooling device 20 is a thin cooling device attached to the ceiling surface 3, and has a thin housing 60 that is flat as a whole and has a long (long) length in the front-rear and left-right directions with respect to the vertical thickness. Including. The shape of the housing 60 viewed from the side is a flat or crushed L-shape extending forward and backward, assuming that the blowing direction of the cold air 6 is forward, and the vertical direction of the front portion (first portion) 23 is vertical. The thickness of the rear portion (second portion) 24 relative to the dimension (thickness) is small, the first portion 23 is directly attached to the ceiling surface 3, and the second portion 24 is attached to the ceiling surface via the stay 35. 3 with a gap (space) S open.

  The housing 60 includes a two-step upper surface 61, a crushed L-shaped side surface 63 inclined so that the rear of the lower side is lowered, and a substantially flat lower surface 65. The upper surface 61 of the housing 60 includes a first flat portion 31 attached to the ceiling surface 3 and a second flat portion 32 that is retracted from the first flat portion 31, and includes the first flat portion 31 and the second flat portion 31. The flat portion 32 is connected by an inclined connecting portion 33, and a step (level difference) is formed between the first flat portion 31 and the second flat portion 32. A blowout port 41 for the cold air 6 is provided in the front (front surface) 67 of the housing 60, and an intake port 34 for the air 5 is provided side by side in the width direction in the second flat portion 32 behind the upper surface 61. . The evaporator 21 is housed in the first portion 23 below the first flat portion 31 in front of the housing 60, and the fan 22 is housed in the second portion 24 below the second flat portion 32 behind. The air 5 sucked by the fan 22 from the intake port 34 on the upper surface 61 is cooled by the front evaporator 21, and is output as the cold air 6 from the front outlet 41.

  The housing 60 is roughly divided into two components, and includes an upper housing (frame) 30 that constitutes the upper surface 61, and a lower housing (cover) that constitutes the side surface 63 and the lower surface 65 and is attached so as to cover the upper housing 30. 40. The cover 40 is a member integrally formed of resin or metal and has a function as a drain pan.

  The first flat portion 31 of the frame 30 includes a U-shaped opening 37 that opens toward the front blowing port 41 and screw holes 36 provided on both sides thereof, and is directly on the ceiling surface 3. It is attached. The second flat portion 32 includes two air intake ports 34 arranged in the width direction, and three stays (support members) 35 arranged so as to sandwich the intake ports 34. A screw hole 36 is provided in each stay 35, and the second flat portion 32 is attached to the ceiling surface 3 via the stay 35, and a gap S is formed between the ceiling surface 3 and the second flat portion 32. It is designed to be provided. The number of intakes 34 provided in the second flat portion 32 may be one or three or more. Also, the number of stays 35 may be one, two, or four or more.

  As described above, in the air 5 sucked by the cooling device 20, the cooled cargo compartment 2 is often opened and closed, so that a part of the moisture in the cargo compartment 2 is formed by being frozen. It has been reported that it is contained as fine ice (sublimated particles), adheres to the fan guard, closes the suction port, and drops as a drain on the luggage. This problem is a big problem especially when the luggage compartment 2 is used as a refrigerator or a freezer. In addition, if air 5 is sucked from the lower surface, it is necessary to secure an air flow path below the cooling device even if the cooling device is thin, and there is a report that an increase in effective load capacity cannot be expected. Has been.

  When the cooling device 20 of this example is mounted on the ceiling surface 3 of the luggage compartment 2, the air intake 34 of the cooling device 20 faces the ceiling surface 3. For this reason, it is not necessary to secure a space for taking in the air 5 below the cooling device 20. Furthermore, in order to take in the air 5 also on the side surface 63 of the housing 60, it is only necessary to secure a space near the ceiling surface 3. Therefore, the luggage can be loaded in the luggage compartment 2 until the side surface of the cooling device 20 is reached, and an increase in effective loadable capacity due to the installation of the cooling device 20 can be expected. Furthermore, since the air 5 having the highest temperature near the ceiling surface 3 can be sucked and circulated as the cold air 6, the cargo compartment 2 can be efficiently cooled.

  An intake port 34 for air 5 is arranged on the upper surface 61 of the thin flat housing 60 facing the ceiling surface 3, specifically, the second flat portion 32. In the thin housing 60, the area of the upper surface 61 is large with respect to the side surface 63, and a large opening area of the intake port 34 can be secured. Furthermore, since the intake 34 faces the ceiling surface 3, the intake 34 cannot be easily accessed during operation. For this reason, a fine fan guard for preventing foreign objects and hands from entering is unnecessary, and it is not necessary to provide a fan guard as in the cooling device 20 of this example. Therefore, the opening ratio of the intake port 34 can be increased, the passing air speed of the intake port 34 can be reduced, and frost can be prevented from icing on the intake port 34 or the intake port 34 can be prevented from being reduced or blocked by the frost. Furthermore, since the opening area of the intake port 34 can be increased, the power consumption of the fan 22 can be reduced and the generation of passing sound can also be suppressed.

  Further, when the cooling device 20 is attached to the ceiling surface 3, a space (duct space) S through which the air 5 passes is formed between the ceiling surface 3 and the second flat portion 32, and the second flat portion 32. The air 5 flows in along the portion 3a of the ceiling surface 3 facing the. The second flat portion 32 is a part of the upper surface 61 of the thin flat plate-shaped housing 60, can ensure a large area, and can also increase the area of the ceiling portion 3 a facing the second flat portion 32. For this reason, the air 5 flowing into the fan 22 and the intake port 34 flows along the ceiling portion 3a facing the second flat portion 32 before flowing in, and the air 5 includes ice crystals. Before flowing into the intake port 34, the ceiling portion 3a having a large area can be frosted.

  Moreover, even if the area of the 2nd flat part 32 is also large and the opening of sufficient area is ensured as the intake port 34, the area of the peripheral part 32a can be ensured, and the peripheral part (left and right and back of the intake 34) 32a Can be used as an area for frosting. Since these portions (regions) cover a wide area around the second flat portion 32, even if frost formation grows to some extent, it is difficult for the whole to be blocked, and it is easy to suppress a decrease in air flow. Therefore, it is not necessary to provide a structure for newly preventing frost formation, a configuration for melting frosted ice, and the like, and the cooling device 20 that is compact and has a high cooling efficiency can be provided.

  In addition, the drain that melted ice formed on the ceiling portion 3 a facing the second flat portion 32 is dripped onto the second flat portion 32 facing the ice, and the ice that has formed frost on the second flat portion 32 is formed. The melted drain also flows through the second flat portion 32, enters the housing 60 through the intake port 34, and is collected by the cover 40 that also serves as a drain pan. Therefore, it is possible to prevent the molten water due to icing generated in these portions from dripping onto the luggage.

  The height of the gap (space) S between the ceiling surface 3 and the second flat portion 32 or the difference in height between the first flat portion 31 and the second flat portion 32, that is, the height of the stay 35. Considering that the air volume does not decrease excessively or the wind speed does not increase excessively even if there is some frost formation, is preferably 30 mm or more, and more preferably 35 mm or more. If the thickness is less than 30 mm, it is difficult to secure the air volume with the fan 22. Moreover, when the height of the stay 35 is increased, it leads to a decrease in the effective stackable capacity. Therefore, it is preferably 100 mm or less, more preferably 60 mm or less, and if it is 50 mm or less, frost formation can be suppressed. It is even more preferable without a hand.

  The cooling device 20 of this example includes two turbo fans 22 and is fixed so as to be suspended from the second flat portion 32 so as to suck air 5 from the two intake ports 34 of the second flat portion 32. Has been. The air 5 sucked by the fan 22 is blown out from the side of the turbo fan 22, passes through the housing 60, is cooled by the evaporator 21 housed in the first portion 23, and then flows from the blowout port 41 to the cargo compartment 2. Be blown. The fan 22 may be a sirocco fan, a propeller fan, or the like, but by using a turbo fan, it is easy to secure the air volume and the wind pressure, and the cooling device 20 can be easily thinned.

  The first flat portion 31 of the upper surface 61 of the housing 60 of the cooling device 20 includes an opening 37 and is fixed so as to be suspended from the frame 30 so that the evaporator 21 appears in the opening 37. The cooling device 20 includes a packing (seal) 25 disposed so as to cover the opening 37. When the first flat portion 31 is attached to the ceiling surface 3, the opening 37 is formed on the ceiling surface 3 via the packing 25. It is in a blocked state. In this cooling device 20, the portion sandwiching the opening 37 of the frame 30 is a portion for attaching the cooling device 20 to the ceiling surface 3, and even if the opening 37 is provided, the strength can be ensured. For this reason, providing the opening 37 can reduce the weight or provide an economic advantage. Further, inside the housing 60, the air 5 is taken into the fan 22 from the intake port 34 opened above the fan 22, flows along the bottom surface 69 in the housing 60, and is supplied to the evaporator 21. For this reason, the opening 37 corresponding to the upper surface of the housing 60 can cope with wind pressure or the like as long as it is sealed with the packing 25. The packing 25 may be disposed between the frame 30 and the evaporator 21 to block the opening 37, or may be disposed between the first flat portion 31 and the ceiling surface 3 to block the opening 37. The structure of the mounting surface of the upper housing (frame) 30 including the first flat portion 31 can be simplified. Therefore, the cooling device 20 installed in the refrigerator 2 can be reduced in thickness and weight.

  FIG. 5 is a perspective view showing a schematic configuration of the lower housing (cover) 40. The cover 40 of the cooling device 20 is a member in which the bottom wall 45 and the peripheral wall 46 are integrally formed, and also serves as a drain pan. A screw hole 46 a for fixing the cover 40 to the frame 30 fixed to the ceiling surface 3 is formed in the peripheral wall 46. The cover 40 may be made of metal or the like, but by integrally molding with resin, it is not necessary to close a gap or the like after molding, and the cooling device 20 can be simplified and reduced in weight.

  The inner surface of the bottom wall 45 of the cover 40, that is, the bottom surface 69, has a first drain pan 43 that functions as a drain pan of the first portion 23 in the front of the housing 60 and a second drain pan that functions as a drain pan in the rear second portion 24. The drain pan 44, and a convex portion (first convex portion, weir, dike) that controls the flow of drain generated in each of the first portion 23 and the second portion 24 at the boundary between the drain pan 43 and the drain pan 44 42. Drain pipes 47 for discharging the drain to the outside of the cooling device 20 are attached to both end portions 51 of the second drain pan 44, and inwardly recessed portions 53 for arranging the drain pipes 47 at both ends of the cover 40. Is provided. In addition, a shape 49 rising upward is provided behind the cover 40, and a screw hole 49 a for fixing the cover 40 to the center stay 35 is provided. While being able to support the center part of the cover 40 with respect to the ceiling surface 3, it can prevent that a drain leaks from the screw hole 49a.

  The convex portion 42 is formed in a U-shape convex forward (in the direction of the evaporator 21) in plan view so as to surround the two fans 22 housed in the second portion 24. The first drain pan 43 portion of the bottom surface 69 is inclined downward toward the rear second drain pan 44 portion, and the drain 28 generated mainly by the evaporator 21 or the like extends along the first convex portion 42. Are collected at both ends 51 and discharged from the drain pipe 47. A drain heater that promotes melting of the evaporator 21 when the evaporator 21 is frosted or the like may be disposed on the portion of the first drain pan 43 of the bottom surface 69, and in order to make it easier to transfer the heat of the drain heater. Etc. may be arranged.

  The portion of the second drain pan 44 on the bottom surface 69 is substantially flat with respect to the ceiling surface 3, and the fan 22 and the drain 29 that has flown through the frosted ice and has flowed from the intake port 34 have the first convex portion 42. Through the gaps 52 formed at both ends of the drain pipe 47, the liquid is discharged from the drain pipe 47 to the outside. You may comprise so that the bottom of the 2nd drain pan 44 may incline slightly toward each clearance gap 52. FIG.

  By providing the first convex portion 42 at the boundary between the first drain pan 43 portion and the second drain pan 44 portion of the bottom surface 69, the drain 28 generated in the first portion 23 in front of the evaporator 21 or the like is generated. It is possible to prevent the fan 22 and the like disposed in the rear second portion 24 from being applied. Moreover, it can suppress that the drain 29 which generate | occur | produced in the 2nd part 24 is caught in the wind pressure which the fan 22 blows off, and applies to the evaporator 21 grade | etc.,.

  The cover 40 is a member in which the peripheral wall 46 and the bottom wall 45 are integrally formed, and the blowout port 41 provided in the upper front portion, the piping system 13 provided in the upper rear portion, and the opening for taking out the wiring and the like to the outside. Except for the screw hole 46 a for connecting the portion 48 and the frame 30 provided at the upper part of the peripheral wall 46, there are no notches and holes, and the drains 28 and 29 collected in the cover 40 are located below the cover 40. It is discharged through a drain pipe 47 that is only connected. Therefore, the drains 28 and 29 can be prevented from leaking out of the cooling device 20.

  As described above, in the cooling device 20, the first flat portion 31 in which the upper surface 61 of the housing 60 is attached to the ceiling surface 3 and the second flat portion 32 retracted from the first flat portion 31 are provided. In addition, an air intake 34 facing the ceiling surface 3 is provided in the second flat portion 32. The cooling device 20 is attached to the ceiling surface 3 so that the entire upper surface 61 of the housing 60 is flat and an appropriate gap S is formed between the upper surface 61 and the ceiling surface 3. The air 5 may be adapted to be taken in from the facing intake 34. By providing the first flat part 31 attached to the ceiling surface 3, the distance that the cooling device 20 protrudes from the ceiling surface 3 can be reduced. The cooling device 20 can load a load until it reaches the side surface 63 beyond the lower surface 65, but by making the lower surface 65 close to the ceiling surface 3, the effective loadable capacity of the luggage compartment 2 can be further increased. Further, since the space between the intake port 34 and the blowout port 41 can be blocked by the first flat portion 31, it is possible to suppress the cold air 6 from being short-circuited and entering the intake port 34.

  The cover 40 covering the lower side of the housing 60 may be a divided structure instead of an integrated type. However, since the cooling device 20 is provided with the air intake 34 toward the ceiling surface 3, it is possible to eliminate openings and cutouts such as the intake on the lower surface and side surfaces, and the housing 60 of the cooling device 20 can be removed. By forming the lower cover 40 integrally, it is easy to make the drains 28 and 29 difficult to leak out of the cooling device 20. Therefore, it is possible to prevent the drain generated in the cooling device 20 or the duct space S from leaking to the outside of the cooling device 20 and wetting the luggage.

  In addition, in the above description, although demonstrated based on the example in which the cooling device 20 was attached to the ceiling surface 3 of the luggage compartment 2 of the truck 1, you may attach the cooling device 20 to a side wall etc. The cooling device 20 may be used not only in the truck luggage compartment 2 but also in a refrigerated container transported by truck, train or ship, a warehouse, a cooling area inside a building, or the like. The cooling device 20 may be an air conditioner equipped with a heating device such as a heater.

DESCRIPTION OF SYMBOLS 20 Cooling device, 21 Evaporator, 22 Fan 30 Upper housing 31 1st flat part, 32 2nd flat part, 34 Air intake 40 Lower housing, 41 Outlet, 42 Convex part (1st convex part)
60 housing

Claims (9)

A cooling device attached to a wall,
An air inlet facing the wall;
A blowout port for blowing out the cooled air along the wall surface ;
A housing including a first flat portion and a second flat portion recessed from the first flat portion;
The cooling device , wherein the first flat portion is attached to the wall surface, and the intake port is provided in the second flat portion . In claim 1 ,
An evaporator housed in a first portion below the first flat portion of the housing;
A cooling device, comprising: a suction fan housed in a second portion below the second flat portion of the housing. In claim 2 ,
The cooling device, wherein the first part is sealed off by the wall surface via packing. A cooling device attached to a wall,
An air inlet facing the wall;
A blowout port for blowing out the cooled air along the wall surface;
The cooling device, wherein the wall surface is a ceiling surface. In any of claims 1 to 3 ,
The wall surface is a ceiling surface;
The housing includes a lower housing in which a bottom wall and a peripheral wall are integrally molded and also serves as a drain pan. In claim 2 or 3 ,
The wall surface is a ceiling surface;
The said housing is a cooling device containing the convex part provided in the boundary of the said 1st part and the said 2nd part of the bottom face of the said housing. In claim 2 or 3 ,
The cooling device, wherein the fan is a turbo fan. In any of claims 1 to 3,
The cooling device, wherein a difference in height between the first flat portion and the second flat portion is 30 mm or more and 100 mm or less.   A vehicle in which the cooling device according to any one of claims 1 to 8 is mounted on a ceiling.

Images