JPH0526684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vehicle roof-mounted cooling device that is mounted on the ceiling of a vehicle.

[Prior Art] Conventionally, a cooling unit including an evaporator and a blower housed in a housing equipped with an outside air inlet, a circulating inside air inlet, a cold air outlet, and a damper for switching inside and outside air, a case of the cooling unit, and a condenser cooling unit have been developed. A roof-mounted cooling system for a vehicle includes a condensing unit containing a condenser and a blower in a housing with an air inlet and an outlet, and a case for the condensing unit. Each case has three types. be. The first is a case that combines a box structure made of aluminum or steel plates and a reinforcing frame, and the second is a case made of fiber reinforced plastic (FRP).
A case made of a combination of high-strength plastic and a reinforcing frame (generally steel), such as
This is a case where only high-strength plastics such as FRP are used.

[Problems to be Solved by the Invention] In the unit case of the roof-mounted cooling system for vehicles as configured above, the first type is heavy and is not suitable for complicated processing, so the function of the cooling system is limited. There is a drawback that separate parts such as many fastening screws and fastening frames are required to store the parts, and the second
In the case of type 3, the number of steps required to combine FRP and the reinforcing frame is large, and the weight of the reinforcing frame increases.In the case of type 3, the load is borne by FRP itself, so the weight of the FRP itself increases. The wall thickness had to be considerably thicker, and the weight was about the same as the second type.

SUMMARY OF THE INVENTION The present invention aims to provide a roof-mounted cooling device for a vehicle that is lightweight and reduces the number of steps by reducing the thickness of the members as much as possible.

[Means for Solving the Problems] In order to achieve the above object, the vehicle roof-mounted cooling device of the present invention includes a cooling unit comprising an evaporator and a blower, and a condensing unit comprising a condenser and a blower. In a roof-mounted vehicle cooling system that is integrally housed in one unit case, the unit case includes: a front bottom plate portion that forms a front room that houses one of the cooling unit and the condensing unit; a rear bottom plate portion forming a rear room for housing the other of the cooling unit or the condensing unit; an inner wall extending upward from the periphery of the front bottom plate portion and the periphery of the rear bottom plate portion; an outer wall disposed on the outside of the wall substantially parallel to the inner wall; and a top plate connecting the upper end of the inner wall and the upper end of the outer wall; A configuration is adopted in which a substantially Japanese-shaped ridge-like part that surrounds the side room and separates the front room and the rear room is integrally molded.

[Function] The vehicle roof-mounted cooling system constructed as described above has a front bottom plate, a rear bottom plate, and a roughly Japanese-shaped ridge-shaped portion that are integrally molded in the case body of the unit case. By forming the side wall of the housing that houses the unit or condensing unit into a double structure of an outer wall and an inner wall, sufficient rigidity is achieved within the limited total height of the case.

[Embodiment] The roof-mounted cooling device for a vehicle according to the present invention will be described below based on an embodiment shown in the drawings.

In this embodiment, the vehicle roof-mounted cooling device 1 of the present invention is installed on the roof of a bus 100, and includes an outside air inlet 21, cold air outlets 22A and 22B, a circulating inside air inlet 23, and a damper 24 for opening and closing the outside air inlet. A cooling unit 3 housed in a housing 2 equipped with a cooling unit 3 and a condenser cooling air inlet 41, 411A,
412A, 413A, 411B, 412B, 41
3B and exits 42a, 42b, 42c, 42d, 4
A condensing unit 5 housed in a housing 4 with 2e and 42f, a package type unit case (hereinafter abbreviated as case) A that integrates the case of the cooling unit 3 and the case of the condensing unit 5. It is stored.

The cooling unit 3 has evaporators 31A, 31B on the bottom between the outside air inlet 21 and the cold air outlets 22A, 22B in the housing 2.
and internal air circulation blowers 32A, 32B, 32C, 3
2D, 32E, 32F, 32G, and 32H are provided facing each other, and expansion valves 33A and 33B are provided on the bottom surface between the blowers 32D and 32H.

The condensing unit 5 has liquid receivers 51A and 5 at the center on the bottom inside the housing 4.
1B are provided in tandem, and the receivers 51A, 5
Condenser (condenser) horizontally centered on 1B
52A, 52B, 52C, 52D, exhaust blow 53A, 53B, 53C, 53D, 53E, 53
F are provided in parallel, and capacitors 52A, 52
Dryers 54A and 54B are provided in front of B. These cooling unit 3 and condensing unit 5 are frozen by refrigerant pipe a.

In the refrigeration cycle of this embodiment, the evaporator 31
A and 31B evaporate the refrigerant to obtain a low heat source to cool the cooling air, and then increase the potential to high temperature and high pressure gas in order to liquefy the vaporized refrigerant in a compressor (not shown). compressed and lower than outside temperature
The refrigerant that has become 20 to 30 degrees Celsius is the condenser 52A,
52B diffuses heat and becomes a high-pressure liquid refrigerant,
After the liquid refrigerant is stored in the receivers 51A and 51B, water and dirt in the liquid refrigerant are removed by the dryers 54A and 54B, and the liquid refrigerant enters the expansion valves 33A and 33B, where it is depressurized and becomes a low-temperature, low-pressure atomized refrigerant, which is then transferred to the evaporators 31A and 31B. The cycle ends when the process returns to .

The case A is made of fiber-reinforced plastic (FRP), which is a high-strength plastic with excellent workability and strength, and includes an integrally molded case body 6, a lid 6a of a front room 6A formed by the case body 6, and and a lid 6b for the rear room 6B.

The case body 6 includes an outer wall 61 that is bent upward from a fastening portion 611 to the bottom plate and further forms an inwardly curved portion 612, and an inner wall 62 that is arranged substantially parallel to the outer wall 61 at a constant interval. It has a substantially planar top plate 63 that connects R-shaped portions 613 and 623 formed at the upper ends of both side walls, and has a substantially rectangular planar shape and has a refrigerant pipe a disposed therein. an outer frame portion 64 provided within the outer frame portion 64;
It has a substantially rectangular planar shape and a front room 6A.
and a roughly Japanese-shaped ridge 66 consisting of a partition 65 that separates the rear room 6B, and a front room 6A surrounded by the ridge 66 for housing the cooling unit 3. A front bottom plate portion 67 and a rear bottom portion 68 forming a rear side room 6B for housing the condensing unit 5 are integrally molded.

The front room 6A is a storage room for the cooling unit 3 in this embodiment, and the front side 66A of the ridge-like part 66 surrounding the front room 6A has an opening 61a connected to the outer wall 61 and the inner wall 62 by a duct 60. 62a is provided to form outside air inlets 21a, 21b to the front room 6A, and a grill 69 is provided in the opening 61a of the outer wall 61. A damper 24 for opening and closing the outside air inlet is provided on the inner wall 62a, and the grill 69 and the damper 24 for opening and closing the outside air inlet are provided.
An air filter 72, which is an air filter, is installed between the two.

In this embodiment, the rear room 6B is a storage room for the condensing unit 5, and the rear room 6B is a storage room for the condensing unit 5.
Openings 621 are provided in the outer wall 61 and the inner wall 62 on both sides 66B and 66C of the ridge-shaped portion 66 surrounding the condenser cooling air inlets 411A and 412, respectively.
A, 413A, 411B, 412B, 413B are formed, and the opening of the outer wall 61 is provided with a grill 731A,
732A, 733A, 731B, 732B, 73
3B, and a refrigerant pipe a is provided in the space between the outer wall 61 and the inner wall 62.

The lid 6a of the front room 6A is a rectangular flat plate with convex portions 74A and 74B formed in parallel in the vertical direction, and the lid 6b of the rear room 6B is a circular opening bent inward. 75A, 75B, 75C, 7
5D, 75E, 75F and a plurality of short openings 76 are provided, and circular openings 75A, 75B, 75C,
75D, 75E, 75F are condenser cooling air outlets 42a, 42b, 42c, 42d, 42e, 4
2f and is provided with a guard screen, the rectangular opening 76 forms the condenser cooling air inlet 41, and is provided with a grille 77. Further, the space between the outer wall 61 and the inner wall 62 of the front room 6A is used as cold air blowing chambers 79A, 79B, and brackets 78A, 78B for refrigerant piping are fastened as a bottom plate, and the brackets 78A, 78B are used as the vehicle ducts. Openings 78a and 78b are formed that communicate with the cold air outlets 22 and 76A.
A, 22B.

The front bottom plate portion 67 of the case body 6 is connected to the blower 32.
A, 32B, 32C, 32D, 32E, 32F,
32G, 32H mounting protrusions 67a, 67b, and a protrusion 67e where the evaporators 31A, 31B are attached and waterways 67c, 67d are formed for draining the condensed water of the evaporators 31A, 31B.
67f, and an opening 67g in which a circulating internal air inlet 23 is formed in the center. The rear bottom plate portion 68 of the case body 6 includes a locking convex portion 68a that locks the receivers 51A, 51B, and a locking convex portion 68a that locks the receivers 51A, 51B, and the blowers 53A, 53B, 53.
Opening 68 for mounting C, 53D, 53E, 53F
A convex portion 68c with b is formed.

Here, the arrangement of the cooling unit and the condensing unit may be such that, contrary to the present embodiment, the condensing unit may be arranged on the front side and the cooling unit on the rear side. Further, the case of the cooling unit and the case of the condensing unit may be separated.

In this embodiment, the space on both sides of the ridged part of the case body and the space inside the top plate is used as a blowout chamber for cold air at the front, and this blowout chamber acts as a muffler, so noise inside the vehicle is reduced. can be reduced.

[Effects of the Invention] In the roof-mounted cooling device for a vehicle of the present invention having the above-described configuration, the case body of the unit case is integrated with a front bottom plate portion, a rear bottom plate portion, and a roughly Japanese-shaped ridge portion. Because it is molded, the wall thickness of the unit case can be made as thin as possible, making it lighter and reducing the number of processes.
Sufficient rigidity can be obtained within a limited total height,
The space within the ridge formed by the inner wall, outer wall, and top plate can be effectively used as a ventilation duct, equipment storage space, etc.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the roof-mounted cooling system for a vehicle according to the present invention with the lid removed; FIG. 2 is a perspective view of the roof-mounted cooling system for a vehicle according to the present invention; and FIG. FIG. 4 is a front view of the vehicle roof-mounted cooling device of the present invention; FIG. 5 is a side view of the vehicle roof-mounted cooling device of the present invention;
Figure 6 is a sectional view taken along A1-A1 in Figure 3, Figure 7 is a sectional view taken along A2-A2 in Figure 3, and Figure 8 is A3 in Figure 3.
-A3 sectional view. In the diagram: 1... Roof-mounted cooling system for vehicles, 2,
4...Housing, 3...Cooling unit,
5...Condensing unit, 6...Case body, A...Unit case, 6A...Front side room, 6B...Rear side room, 6a...Front side lid body, 6
b... Rear lid body, 21... Outside air inlet, 22A, 2
2B... Cold air outlet, 23... Circulating internal air inlet, 24
...Outside air intake opening/closing damper, 31A, 31B...
Evaporator, 32A, 32B, 32
C, 32D, 32E, 32F, 32G, 32H...
...Inside air circulation blower, 41,411A,412
A, 413A, 411B, 412B, 413B...
...Condenser cooling air inlet, 42a, 42b, 42
c, 42d, 42e, 42f...Condenser cooling air outlet, 52A to 52D...Condenser (condenser), 53A to 53F...Blower for exhaust air, 61...
...Outer wall, 62...Inner wall, 63...Top plate, 66
... ridge-like part, 67 ... front bottom plate part, 68 ... rear bottom plate part.

Claims (1)

[Scope of Claims] 1. A roof-mounted vehicle cooling system in which a cooling unit comprising an evaporator and a blower and a condensing unit comprising a condenser and a blower are integrally housed in one unit case, wherein the unit comprises: The case includes: a front bottom plate portion forming a front room for storing one of the cooling unit or the condensing unit; and a rear bottom plate portion forming a rear room for storing the other of the cooling unit or the condensing unit. a bottom plate portion, an inner wall extending upward from the periphery of the front bottom plate portion and the rear bottom plate portion, an outer wall arranged approximately parallel to the inner wall outside the inner wall, and the inner wall It has a top plate that connects the upper end and the upper end of the outer wall, surrounds the front room and the rear room, and partitions the front room and the rear room. A roof-mounted cooling device for a vehicle, characterized in that a sun-shaped ridge portion is integrally molded. 2. The roof-mounted cooling device for a vehicle according to claim 1, wherein the unit case is made of fiber reinforced plastic (FRP). 3. The roof-mounted cooling device for a vehicle according to claim 1, wherein the ridged portion forms an outer frame portion having a substantially rectangular planar shape. 4. The cooling unit is housed in the front room, and the front side of the ridge-like part surrounding the front room is connected to the outer wall and the inner wall by a duct, and has an outside air inlet to the front room. a grille is provided in the opening in the outer wall; a damper for opening and closing the outside air inlet is provided in the opening in the inner wall; and an air filter is provided between the grille and the damper. 2. A roof-mounted cooling device for a vehicle according to claim 1, wherein said cooling device is mounted on a roof of a vehicle. 5. The condensing unit is housed in the rear room, and openings forming the condenser cooling air inlets are formed in the outer wall and the inner wall on both sides of the ridge-like part surrounding the rear room. 2. The roof-mounted cooling device for a vehicle according to claim 1, wherein the outside wall opening is provided with a grill. 6. The condensing unit is housed in the rear room, and the rear room is closed by a lid, and the lid is provided with a circular opening and a rectangular opening, and the circular opening is provided with a circular opening and a rectangular opening. The air outlet of the blower is formed in the shaped opening, a guard net is provided in the circular opening, the air inlet for cooling the condenser is formed in the rectangular opening, and the rectangular opening is formed with an air inlet for cooling the condenser. 2. The roof-mounted cooling device for a vehicle according to claim 1, further comprising a grill. 7. The roof-mounted cooling device for a vehicle according to claim 1, wherein a refrigerant pipe is disposed inside the ridge-like portion. 8. The cooling unit is housed in the front room, and the front bottom plate of the front room is provided with a water channel for draining condensed water from the evaporator. The roof-mounted cooling device for a vehicle according to item 1.