JP2000205728A - Refrigeration unit for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigeration unit for a vehicle which can prevent a decline in heat exchange effectiveness with a limited space. SOLUTION: A refrigeration unit for a vehicle is provided with a refrigerating machine unit 9 in which an evaporator 19 and a fan 25 for evaporator are mounted inside an evaporator house 29 and a condenser 15 and a fan 23 for condenser are mounted outside the house 29. The unit 9 is attached to the refrigerator 3 of a vehicle to cool the inside the refrigerator 3. The evaporator 19 is arranged above the house 29 with a clearance for forming an air passage 30 between the evaporator 19 and the internal side face of the house 29 and the fan 25 is an axial fan and provided between the internal side face of the house 29 and evaporator 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system for a vehicle, which is mounted on a refrigerator of a vehicle and cools the inside of the refrigerator.

[0002]

2. Description of the Related Art As this kind of conventional vehicle refrigeration system,
In Japanese Patent Application Laid-Open No. 9-99773, an evaporator (evaporator) is mounted inside a vehicle storage (refrigerator), a condenser (condenser) is mounted outside the refrigerator, and the evaporator protrudes from the storage toward the cabin. Disclosed is a configuration disposed on the inner wall.

In general, in such a vehicle refrigeration system, an evaporator is provided inside an evaporator house, and an evaporator fan is disposed thereon. Air is passed upward from below the evaporator, and the air passing through the evaporator is used as a fan. The air is being blown into the refrigerator.

[0004] On the other hand, in the evaporator, water droplets condensed on the evaporator fall according to gravity and collect at the lower end of the evaporator, and the condensed water forms a bridge at the lower end of the evaporator, and further, the condensed water may freeze.

[0005]

However, in the conventional vehicle refrigeration system described above, the air passing through the evaporator is blown upward from below the evaporator.
The bridge of dew condensation formed between the fins at the lower end of the evaporator may impede ventilation and reduce heat exchange efficiency.

In a so-called refrigerator unit having an evaporator, an evaporator fan inside the evaporator house, and a condenser and a condenser fan outside the evaporator house, the space passing through the evaporator house is limited because the space inside the evaporator house is limited. Flow is restricted.

An object of the present invention is to provide a vehicle refrigeration system that can prevent a decrease in heat exchange efficiency in a limited space.

[0008]

According to a first aspect of the present invention, an evaporator and an evaporator fan are mounted inside an evaporator house.
A refrigerating machine unit having a condenser and a condenser fan mounted on the outside of an evaporator house, wherein the refrigerating machine unit is mounted on a refrigerator of a vehicle to cool the refrigerator, and the evaporator is an evaporator. On the upper side of the house, the evaporator fan is disposed at an interval forming an air passage between the evaporator house and the inner surface thereof, and the evaporator fan is an axial fan, and is provided between the inner surface of the evaporator house and the evaporator. The air that has flowed into the inside of the evaporator house from the lower side of the evaporator house passes through the evaporator from the inside of the evaporator house and is blown into the refrigerator.

According to the first aspect of the invention, inside the evaporator house, the air in the refrigerator passes from the lower side of the evaporator to the ventilation path on the back side of the evaporator, and is directed from the ventilation path to the evaporator by the evaporator fan. Blown. The blown air passes through the evaporator in a substantially horizontal direction and is blown into the refrigerator. Therefore,
Even when the dew condensation water forms a bridge at the lower end of the evaporator, the blown air passes through the evaporator in the horizontal direction, so that the ventilation of the blown air is not hindered and a decrease in heat exchange efficiency is prevented. In addition, since the air does not pass upward between the fins of the evaporator from the lower end where the dew condensation water collects and wind up the water, the scattering of the water is prevented. Moreover, the space inside the evaporator house is almost the same as that of the conventional one, and it is possible to prevent the refrigerator unit from becoming large. Furthermore, since the axial fan is used as the evaporator fan, the air volume can be secured and the configuration can be made compact. Furthermore, refrigeration equipment such as an evaporator and a condenser is integrated as a refrigerator unit attached to the evaporator house, and the refrigerator unit can be easily and quickly mounted simply by mounting the refrigerator unit in the opening of the refrigerator.

According to a second aspect of the present invention, there is provided a refrigerator unit in which an evaporator and an evaporator fan are mounted inside an evaporator house, and a condenser and a condenser fan are mounted outside the evaporator house. A vehicular refrigeration system that cools the inside of a refrigerator by mounting the unit in a refrigerator of a vehicle, wherein the evaporator has an interval below an evaporator house to form a ventilation path between the inside surface of the evaporator house and the evaporator. The evaporator fan is a centrifugal fan, and is provided above the evaporator, and the air that has passed through the evaporator from the refrigerator side and flowed into the ventilation path is directed from the evaporator fan into the refrigerator. It is characterized by being blown.

According to the second aspect of the invention, the air in the refrigerator passes below the evaporator house in the horizontal direction through the evaporator, passes through the ventilation path on the back side of the evaporator, and is driven by the evaporator fan located above. ,
Air is blown into the refrigerator from the ventilation path inside the evaporator house. Therefore, even when the dew condensation water forms a bridge at the lower end of the evaporator, the blown air passes through the evaporator in the horizontal direction, so that the ventilation of the blown air is not hindered and a decrease in the heat exchange efficiency is prevented. In addition, since the air does not pass upward between the fins of the evaporator from the lower end where the dew condensation water collects and wind up the water, the scattering of the water is prevented. Moreover, the space inside the evaporator house is almost the same as that of the conventional one, and it is possible to prevent the refrigerator unit from becoming large. Further, since the centrifugal fan is used as the evaporator fan and the air is blown in the cross direction, the blowing direction from the ventilation path to the inside of the refrigerator can be secured with a simple configuration and without taking up space. Furthermore, refrigeration equipment such as an evaporator and a condenser is integrated as a refrigerator unit attached to the evaporator house, and the refrigerator unit can be easily and quickly mounted simply by mounting the refrigerator unit in the opening of the refrigerator.

According to a third aspect of the present invention, there is provided a refrigerator unit having an evaporator and an evaporator fan mounted inside an evaporator house and a condenser unit having a condenser and a condenser fan mounted outside the evaporator house. A vehicle refrigeration system for mounting a unit in a vehicle refrigerator to cool the refrigerator, wherein the evaporator is spaced above an evaporator house to form a ventilation path between the evaporator house and an inner side surface of the evaporator house. The evaporator fan is a centrifugal fan, is provided below the evaporator, blows air on the refrigerator side toward the ventilation path, passes through the evaporator from the ventilation path and directs the air inside the refrigerator. It is characterized by being blown.

According to the third aspect of the present invention, the air in the refrigerator is sent to the ventilation passage on the back side of the evaporator by the evaporator fan below the evaporator house, and passes through the evaporator in the horizontal direction from the ventilation passage. And it is blown into the refrigerator. Therefore, even when the dew condensation water forms a bridge at the lower end of the evaporator, the blown air passes through the evaporator in the horizontal direction, so that the ventilation of the blown air is not hindered and a decrease in the heat exchange efficiency is prevented. In addition, since the air does not pass upward between the fins of the evaporator from the lower end where the dew condensation water collects and wind up the water, the scattering of the water is prevented. Moreover, the space inside the evaporator house is almost the same as that of the conventional one, and it is possible to prevent the refrigerator unit from becoming large. Further, since the centrifugal fan is used as the evaporator fan and the air is blown in the cross direction, the blowing direction from the ventilation path to the inside of the refrigerator can be secured with a simple configuration and without taking up space. Furthermore, refrigeration equipment such as an evaporator and a condenser is integrated as a refrigerator unit attached to the evaporator house, and the refrigerator unit can be easily and quickly mounted simply by mounting the refrigerator unit in the opening of the refrigerator.

According to a fourth aspect of the present invention, in the first aspect, the inner surface of the evaporator house is
An inclined surface is provided on the lower side, and the air on the refrigerator side is guided to the ventilation path.

[0015] According to the fourth aspect of the present invention, the first aspect is provided.
At the same time, the air blown from the inside of the refrigerator to the inside of the evaporator house is guided in the cross direction along the inclined surface of the evaporator house, and the ventilation is provided under the evaporator house. Introduced on the road. Therefore, the air flow can be kept smooth, and the ventilation resistance can be reduced.

According to a fifth aspect of the present invention, in the second or third aspect of the present invention, the inner surface of the evaporator house has an inclined surface at a position where the evaporator is disposed, and the air in the ventilation passage is removed by the evaporator. It is a feature of providing guidance to the user.

According to the fifth aspect of the present invention, in the second aspect,
Or the same effect as the invention described in 3 is obtained, and the ventilation path is located at a position where the ventilation direction of the evaporator intersects. However, since the ventilation direction is guided by the inclined surface of the evaporator house, the air flow is reduced. It can be kept smooth and ventilation resistance can be reduced.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG.
Embodiment 1 of the present invention will be described in detail with reference to FIG. 0. First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a refrigerating vehicle 1 according to an embodiment of the present invention includes a refrigerator 3 (which also has a warming function in the present embodiment) on a carrier 7, and a refrigerator unit 9 is provided on a cabin 11 side. It is arranged to protrude.

Here, the refrigerating cycle constituted by the refrigerator unit 9 will be described. As shown in FIG. 5, in the refrigeration cycle, the compressor 13, the condenser 15, the receiver tank 20, the dryer 16, the pressure reducing valve 17, the evaporator 19, and the accumulator 21 form a refrigeration cycle, and the refrigerant flows in this order. , The evaporator 19 is cooled. The refrigeration cycle is provided with a hot gas pipe 65 that bypasses the outlet of the compressor 13 to the evaporator 19, and the evaporator 19 can be defrosted by opening and closing the solenoid valve 14. Further, the condenser 15 is provided with a condenser fan 23, and the evaporator 19 is provided with an evaporator fan 25, each of which performs heat exchange by blowing air.

The refrigerating machine unit 9 is provided by removing the compressor 13 from the refrigerating equipment constituting the refrigerating cycle described above.
All are integrated into a unit and mounted on a refrigerator. The compressor 13 is mounted in the underfloor space of the cabin 11 of the vehicle because the compressor 13 is driven in conjunction with the engine of the vehicle.

As shown in FIGS. 2 and 3, the refrigerator unit 9 is mounted on the cabin 11 side of the refrigerator 3 (see FIG. 1). Are formed. The refrigerator unit 9 houses the evaporator 19 and the evaporator fan 25 inside a concavely formed evaporator house 29.
As described above, since the evaporator 19 and its fan 25 are housed in the concave portion of the evaporator house 29, when the refrigerator unit 19 is mounted, as shown in FIG.
These are located outside the inner wall 3a of the refrigerator 3, and the storage volume in the refrigerator 3 is not reduced.

The evaporator house 29 is made of a heat insulating material, and is provided with a heat insulating property by enclosing a foamed resin in FRP (glass fiber reinforced resin). The evaporator 19 is
It is provided above the inside of the evaporator house 29, and is arranged with an interval for forming the ventilation passage 30 between the evaporator house 29 and the inner surface 29 a of the evaporator house 29. An inclined surface 32 is formed below the inner side surface 29a of the evaporator house 29, and guides the air in the refrigerator 3 obliquely upward from the lower side of the evaporator house 29.

The evaporator 19 is formed by laminating fins that are long in the up-down (gravity direction) direction, so that wind can pass horizontally from inside the evaporator house 29 toward the refrigerator 3. The evaporator fan 25 is
In the present embodiment, the propeller fan (axial fan) is disposed between the inner surface 29 a of the evaporator in the ventilation passage 30 and the evaporator 19. Thereby, the evaporator fan 25 blows the air in the ventilation passage 30 toward the evaporator 19, and the air is blown into the refrigerator 3 after the heat is exchanged by the evaporator 19.

A condenser 15 and a condenser fan 23 are mounted outside the evaporator house 29, and these are protruded from the cabin 11 side. In the present embodiment, the condenser 15 uses a high-efficiency condenser, and is disposed substantially perpendicular to the air blowing direction to reduce the protruding space and reduce the size of the refrigerator unit 9.

Referring to FIG. 4, the structure of the refrigerator unit 9 will be described in further detail. In this embodiment, three evaporator fans 25 are arranged in parallel, while two condenser fans 23 corresponding to one condenser 15 mounted outside the evaporator house 29,
23 is fixed to the capacitor 15 in parallel. By attaching the condenser 15 to the evaporator house 29, it can be fixed stably. In addition, the motor and the like do not obstruct ventilation, and the heat exchange efficiency is good.

The evaporator house 29 is provided with an accumulator, a dryer, a receiver tank, a pressure reducing valve, a relay box, a fuse box, and the like (not shown), in addition to the above-described main components of the refrigeration cycle. Most of the refrigeration equipment except for the refrigeration unit 9 are combined. In this way, by integrating most of the refrigerating equipment except for the compressor 13 into a unit, it is possible to easily and quickly mount the vehicle on the vehicle simply by mounting and fixing the integrated unit 9 as it is. In addition, since each device is integrated, maintenance is easy.

Next, the operation of this embodiment will be described. The manufacture of the refrigerator unit includes the evaporator 19, the evaporator fan 25, the condenser 15,
Refrigeration equipment such as the condenser fan 23 is attached to the evaporator house 29 to form an integrated unit. Such a unit can be easily manufactured at the factory shipping stage.

Next, when mounting the refrigerator, the evaporator house 29 is bolted to the opening 27 of the refrigerator with the cover 31 (see FIG. 4) of the refrigerator unit 9 removed. At the time of mounting, as described above, the evaporator house 29 can be easily mounted simply by fixing both sides with bolts.

During the freezing operation of the refrigerator unit 9, FIG.
As shown by an arrow in FIG. 3, the air in the refrigerator 3 passes through the ventilation path 30 between the evaporator 19 and the inner surface of the evaporator house 29 from below the evaporator 19, and from the ventilation path 30 by the evaporator fan 25. It is blown toward 19. The blast air is evaporator 19
, In a substantially horizontal direction, and after heat exchange, is blown into the refrigerator 3.

On the other hand, during the freezing operation or the defrosting operation,
The water condensed or dissolved on the fins of the evaporator 19 flows downward along the fin surface of the evaporator 19 and is collected at the lower end side of the fins. Since the air passes through the evaporator 19 in the horizontal direction, the ventilation of the blown air is not hindered by the bridge of the dew condensation water, and a decrease in the heat exchange efficiency is prevented. In addition, since air does not pass upward between the fins of the evaporator 19 from the lower end where the condensed water collects and wind up the water, scattering of the water is prevented.

Further, the space inside the evaporator house 29 is almost the same as that of the conventional one, the refrigerator unit 9 does not become large, and the evaporator fan 25
As it uses an axial fan, it can secure the air volume,
The configuration is also compact.

Next, another embodiment of the present invention will be described with reference to FIGS. 6 to 10 of the accompanying drawings. In the following embodiment, the same operation as the above-described embodiment will be described. The same reference numerals are given to the parts having the effect, and the detailed description of the parts will be omitted.

In the embodiment shown in FIG. 6, the evaporator 19 is disposed below the inside of the evaporator house 29, and is spaced apart from the inner side surface 29a of the evaporator house 29 so as to form a ventilation path 30. Are located.

The evaporator fan is a turbo fan (centrifugal fan) 35, which is disposed above the evaporator 19, and the air flowing from the refrigerator 3 through the evaporator 19 into the ventilation passage 30 is supplied to the evaporator fan 35. Is blown into the refrigerator 3.

As shown in FIG. 7, the turbo fan 35 has one side plate 39 having a suction opening 37 on one side and the other side plate 41, and a large number of blades 43 arranged in a circle between these plates. A motor 45 provided at the center
Accordingly, the blades 43 are driven to rotate, and the overall thickness is small, the configuration is compact, and a large air volume can be obtained. The air is sucked through the suction opening 37,
The air is blown toward the outside of the wing 43.

In the second embodiment, as shown by an arrow in FIG.
The air in the refrigerator 3 passes through the evaporator 19 in the horizontal direction, passes through the ventilation path 30 on the back side of the evaporator, and is blown into the refrigerator 3 from the ventilation path 30 by the evaporator fan 35 located above.

In the second embodiment, the same operation and effect as in the above-described embodiment can be obtained. That is, even when the dew condensation water forms a bridge at the lower end of the evaporator 19, the blown air passes through the evaporator 19 in the horizontal direction, so that the ventilation of the blown air is not hindered and the heat exchange efficiency is prevented from lowering. . Further, since air does not pass upward from the lower end where dew condensation water collects between the fins of the evaporator 19 to wind up water,
Prevents splashing of water.

Further, since the turbo fan 35 is employed as the evaporator fan, the air volume and the air velocity can be sufficiently secured. In addition, the turbo fan 35 can reduce the installation space, and blows air in a direction (substantially perpendicular direction) to the suction direction, and can secure a blowing direction from the ventilation path 30 into the refrigerator 3 with a simple configuration.

In the third embodiment shown in FIG. 8, the evaporator 19 has an air passage 30 on the upper side in the evaporator house 29 and between the evaporator house 29 and the inner side surface 29a of the evaporator house 29.
Are arranged at intervals. Below the evaporator house 29, a turbofan 35 similar to that of the above-described second embodiment is disposed. The turbo fan 35 is provided on an inclined surface 45 formed below the evaporator house 29, and has the suction opening 37 obliquely directed into the refrigerator.

In the third embodiment, the air in the refrigerator 3 is blown by the turbo fan 35 below the evaporator house 29 under the evaporator house 29.
0, passes through the evaporator 19 from above the ventilation path 30 in the horizontal direction, and is blown into the refrigerator 3. Also in the third embodiment, even when the dew condensation water forms a bridge at the lower end of the evaporator 19, the blown air passes through the evaporator 19 in the horizontal direction, so that the ventilation of the blown air is not hindered. Prevents reduction in exchange efficiency.
Further, since the air does not pass upward between the fins of the evaporator 19 from the lower end where the dew condensation water gathers and winds up the water, the scattering of the water is prevented. Further, as in the above-described embodiment, the refrigerator unit 9 can be prevented from becoming large, and a turbo fan (centrifugal fan) 35 is used as an evaporator fan to blow air in the cross direction. With this configuration, the direction of air flow from the ventilation path 30 into the refrigerator 3 can be ensured without taking up space.

In the fourth embodiment shown in FIG. 9, a sirocco fan (trademark) 49 is used as a centrifugal fan in place of the turbo fan 35 in the second embodiment. As shown in FIG. 10, the sirocco fan 49 includes two fans 55 a on a shaft 53 of one motor 51.
A fan 55b is provided, and each of the fans 55a and 55b is divided into two by partition plates 59a and 59b. In the fan cases 57a and 57b, a total of four suction ports 61 are formed in the motor 51 side and in a direction opposite to the motor 51 side, and the air is blown out from the two air outlets 63a and 63b.
With this configuration, the air volume of the evaporator fan can be increased.

In the fourth embodiment as well, similarly to the above-described second embodiment, even when dew condensation water forms a bridge at the lower end of the evaporator 19, the blown air passes through the evaporator 19 in the horizontal direction. Therefore, a decrease in heat exchange efficiency is prevented without obstructing ventilation of the blown air.
Further, since the air does not pass upward between the fins of the evaporator 19 from the lower end where the dew condensation water gathers and winds up the water, the scattering of the water is prevented. Furthermore, the sirocco fan 49 blows air in the crossing direction (substantially at right angles), and the blowing direction from the ventilation path to the inside of the refrigerator can be secured with a simple configuration.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0044]

According to the first aspect of the present invention, the blast air passes through the evaporator in a substantially horizontal direction. Therefore, even when the dew condensation water forms a bridge at the lower end of the evaporator, the blast air is blown. It is possible to prevent the heat exchange efficiency from lowering and to prevent the dew water from being scattered by being rolled up without hindering the ventilation. Furthermore, the compact configuration can prevent the refrigerator unit from becoming large, and the axial flow fan is used as the evaporator fan, so that the air volume can be secured and the configuration can be made compact.
Further, the refrigerator can be easily and quickly mounted simply by mounting a refrigerator unit in which refrigerators such as an evaporator and a condenser are integrated into the opening of the refrigerator.

According to the second aspect of the present invention, the blast air is configured to pass through the evaporator in the horizontal direction.
Even when the dew water forms a bridge at the lower end of the evaporator, it is possible to prevent a decrease in heat exchange efficiency and prevent water from being scattered by winding up the dew water without obstructing ventilation of the blown air. Furthermore, the compact configuration prevents the refrigerator unit from becoming large, and uses a centrifugal fan as the evaporator fan to blow air in the cross direction, so that the air flows from the ventilation path into the refrigerator. Can be secured with a simple configuration and without taking up space. Further, the refrigerator can be easily and quickly mounted simply by mounting a refrigerator unit in which refrigerators such as an evaporator and a condenser are integrated into the opening of the refrigerator.

According to the third aspect of the present invention, the blast air is configured to pass through the evaporator in the horizontal direction.
Even when the dew water forms a bridge at the lower end of the evaporator, it is possible to prevent a decrease in heat exchange efficiency and prevent water from being scattered by winding up the dew water without obstructing ventilation of the blown air. Furthermore, the compact configuration prevents the refrigerator unit from becoming large, and uses a centrifugal fan as the evaporator fan to blow air in the cross direction, so that the air flows from the ventilation path into the refrigerator. Can be secured with a simple configuration and without taking up space. Further, the refrigerator can be easily and quickly mounted simply by mounting a refrigerator unit in which refrigerators such as an evaporator and a condenser are integrated into the opening of the refrigerator.

According to the fourth aspect of the present invention, the first aspect is provided.
In addition to the effect of the invention described in (1), the configuration is such that the wind flow is guided by the inclined surface of the evaporator house, so that the air flow can be kept smooth and the ventilation resistance can be reduced.

According to the fifth aspect of the present invention, the effects of the second or third aspect of the present invention are exhibited, and the direction of air blowing is guided by the inclined surface of the evaporator house, so that the flow of air is kept smooth. And the ventilation resistance can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a mounted state of a vehicle refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a schematic configuration of a refrigerator unit.

FIG. 3 is a longitudinal sectional view of the refrigerator unit shown in FIG. 2 in a mounted state.

FIG. 4 is a cross-sectional view of the refrigerator unit in FIG.

FIG. 5 is a circuit diagram of a refrigeration cycle.

FIG. 6 is a longitudinal sectional view illustrating a schematic configuration of a refrigerator unit according to a second embodiment.

FIG. 7 is a perspective view of the turbo fan shown in FIG.

FIG. 8 is a longitudinal sectional view illustrating a schematic configuration of a refrigerator unit according to a third embodiment.

FIG. 9 is a longitudinal sectional view illustrating a schematic configuration of a refrigerator unit according to a fourth embodiment.

FIG. 10 is a front view of the evaporator fan shown in FIG. 9;

[Explanation of symbols]

 9 Refrigerator unit 15 Condenser 19 Evaporator 23 Condenser fan 25 Evaporator fan (axial fan) 29 Evaporator house 30 Wind passage 32 Inclined surface 35 Turbo fan (centrifugal fan) 47 Inclined surface 49 Sirocco fan (centrifugal fan)

Claims (5)

[Claims] 1. A refrigerator unit having an evaporator and an evaporator fan mounted inside an evaporator house, and a refrigerator unit having a condenser and a condenser fan mounted outside the evaporator house. The refrigerator unit is mounted on a refrigerator of a vehicle. A cooling device for a vehicle that cools a refrigerator by mounting the evaporator, wherein the evaporator is arranged above the evaporator house at an interval to form a ventilation path between the evaporator house and an inner surface of the evaporator house, and the evaporator fan is provided. Is an axial fan, which is provided between the inner surface of the evaporator house and the evaporator, and the air that flows into the evaporator house from below the evaporator house passes through the evaporator from the inside of the evaporator house to the refrigerator. A refrigeration system for vehicles, which is blown inward. 2. A refrigerator unit having an evaporator and an evaporator fan mounted inside an evaporator house, and a refrigerator unit having a condenser and a condenser fan mounted outside the evaporator house. The refrigerator unit is mounted on a refrigerator of a vehicle. A vehicle refrigeration apparatus for cooling the inside of a refrigerator by mounting the evaporator, wherein the evaporator is disposed below the evaporator house at an interval to form a ventilation path between the evaporator house and an inner side surface of the evaporator house. The fan for use is a centrifugal fan, and is provided above the evaporator, and the air that has passed through the evaporator from the refrigerator side and flowed into the ventilation path is blown from the evaporator fan into the refrigerator. Vehicle refrigeration system. 3. A refrigerator unit having an evaporator and an evaporator fan mounted inside an evaporator house, and a refrigerator unit having a condenser and a condenser fan mounted outside the evaporator house. The refrigerator unit is mounted on a refrigerator of a vehicle. A vehicle refrigeration apparatus for cooling the inside of a refrigerator by mounting the evaporator, wherein the evaporator is disposed above the evaporator house at an interval to form a ventilation path between the evaporator house and the inner side surface of the evaporator house, and the evaporator is used for the evaporator. The fan is a centrifugal fan, and is provided below the evaporator, blows air on the refrigerator side toward the ventilation path, passes through the evaporator from the ventilation path, and is blown into the refrigerator. Vehicle refrigeration system. 4. The refrigeration system for a vehicle according to claim 1, wherein an inner side surface of the evaporator house has an inclined surface on a lower side to guide air on a refrigerator side to an air passage. 5. The evaporator house according to claim 2, wherein an inner surface of the evaporator house has an inclined surface at a position where the evaporator is disposed, and guides air in a ventilation path toward the evaporator. Refrigeration equipment for vehicles.