Refrigerated transport vehicle

Details Refrigerated transport vehicle Refrigerated transport vehicle

2000-01-13

2002-04-23

Tapolcai, William E. (Department: 3744)

Refrigeration

With vehicle feature

C062S298000

Reexamination Certificate

active

06374626

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a refrigerated transport vehicle provided with a refrigerator for land transportation.
This application is based on Japanese Patent Application No. Hei 11-16260, the contents of which are incorporated herein by reference.
2. Description of the Related Art
Conventional refrigerated transport vehicles are shown in
FIGS. 3 and 4
. In order to refrigerate an adiabatic freezing chamber
90
provided on vehicle
1
, the refrigerated transport vehicle provides with a cooling system comprising an evaporator unit
10
a
or
10
, a condenser unit
20
a
or
20
, a compressor
5
, and coolant pipes.
FIG. 3
shows a refrigerated transport vehicle in which the evaporator unit
10
a
is arranged inside of the adiabatic freezing chamber
90
, and the condenser unit
20
a
is arranged outside of the adiabatic freezing chamber
90
and above the vehicle
1
.
FIG. 4
shows a refrigerated transport vehicle in which the evaporator unit
10
is arranged outside of the adiabatic freezing chamber
90
and above the vehicle
1
, and the condenser unit
20
is arranged on the bottom of the chassis
2
of the vehicle.
FIG. 5
shows that the evaporator
10
equipped with the adiabatic freezing chamber
90
as shown in FIG.
4
. As shown in
FIG. 5
, an opening
91
for fixing the evaporator unit
10
to the adiabatic freezing chamber
90
is formed in the upper front wall of the adiabatic freezing chamber
90
in the travelling direction. The adiabatic evaporator chamber
30
is fixed to the adiabatic freezing chamber
90
so as to cover the opening
91
. Metal fixtures
30
d
are used to fast fix the adiabatic evaporator chamber
30
to the adiabatic freezing chamber
90
. The evaporator unit
10
is equipped in the upper inside wall of the adiabatic evaporator chamber
30
, and maintains the inside of the adiabatic freezing chamber
90
cool. Metal fixtures
30
c
are used to fast fix the evaporator unit
10
to the adiabatic evaporator chamber
30
. The outer and inner walls
30
a
of the adiabatic evaporator chamber
30
are made of reinforced plastics such as fiber-glass reinforced plastic (FRP) for light weight. Foamed synthetic resin
30
b
is filled between the outer and inner walls
30
a
to provide thermal insulation.
As shown in
FIGS. 5 and 6
, the evaporation unit
10
comprises a packing
11
, an evaporator
12
, a propeller type blower
13
, an expansion valve
14
, an accumulator
15
, a drain water pool
16
, and a drain water pipe
17
. The drain water generated by the evaporator
12
is accumulated in the drain water pool
16
. The drain water pool
16
is connected to the drain water pipe
17
. The drain water pipe
17
passes through the adiabatic evaporator chamber
30
, and discharges the drain water accumulated in the drain water pool
16
to the outside of the adiabatic freezing chamber
90
.
The relationship between the evaporator unit
10
, the condenser unit
20
, and the compressor
5
of the cooling system will be explained with
FIGS. 5 and 6
. The compressor
5
provided in the engine room of the vehicle
1
is driven by the engine
6
for the driving the vehicle, via a conduction belt
7
. When the compressor
5
is driven, a coolant vapor of high temperature and high pressure is generated by the compress or
5
, passes through the coolant pipe
40
, and reaches the condenser
21
of the condenser unit
20
, while it is pressurized. Then the coolant vapor is cooled and condensed by contact with the outside air introduced by the propeller type fan
22
for the condenser. The coolant flows out of the condenser
21
, passes through the receiver
23
, the dryer
24
, and the coolant pipe
41
between the condenser unit
20
and evaporator unit
10
, and reaches the expansion valve
14
of the evaporator unit
10
. Then the coolant adiabatically expands by passing through the expansion valve
14
, and heat exchanges with air circulated between the adiabatic freezing chamber
90
and the evaporator
12
by the propeller type blower
13
, while the coolant passes through the pipe for heat exchange. Thereby, the circulating air is cooled. The cooled circulating air is blown out as an airflow indicated by A from the air outlet
11
a
of the evaporator unit
10
to the inside of the adiabatic freezing chamber
90
by the propeller type blower
13
as shown in FIG.
5
. The airflow A cools the inside of the adiabatic freezing chamber
90
. The coolant gasified in the evaporator
12
passes through the accumulator
15
, and the coolant pipe
42
, and returns to the compressor
5
as shown in FIG.
6
.
As explained above, the conventional refrigerated transport vehicle shown in
FIG. 3
comprises the evaporator unit
10
a
in the adiabatic freezing chamber
90
; therefore, the carrying capacity of the adiabatic freezing chamber
90
decreases. The conventional refrigerated transport vehicle shown in
FIG. 4
comprises the condenser unit
20
arranged on the bottom of the chassis
2
of the vehicle; therefore a mudguard is necessary for the condenser unit
20
. When a mudguard is provided, it is impossible to sufficiently employ the airflow generated by driving to cool the condenser
21
. In addition, the condenser unit
20
or
20
a
and the evaporator unit
10
or
10
a
are separated in the conventional refrigerated transport vehicle; therefore, it is necessary to separately provide these units to the adiabatic freezing chamber
90
. Consequently, much time is needed to fit these units. Therefore, a small and light weight cooling system has been desired.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a refrigerated transport vehicle comprising a cooling system which is easily fit to the vehicle, whereby it is possible to decrease its manufacturing cost. Another object of the present invention is to provide a refrigerated transport vehicle comprising a small and light weight cooling system. Another object of the present invention is to provide a refrigerated transport vehicle in which the carrying capacity of the adiabatic freezing chamber
90
is not decreased, and the thermal efficiency is excellent.
In order to accomplish the above object, the refrigerated transport vehicle of the present invention comprises
a vehicle body;
an adiabatic freezing chamber which is provided on the vehicle body and comprises an opening;
an adiabatic evaporator chamber fixed to an outer surface of the freezing chamber so as to cover the opening and to communicate inner spaces of the freezing chamber and the evaporator chamber;
an evaporator unit provided in the inner space of the evaporator chamber for evaporating a coolant liquid and cooling the inner spaces of the freezing chamber and the evaporator chamber;
a condenser unit provided on the outer surface of the evaporator chamber for condensing a coolant vapor and discharging heat of condensation of the coolant vapor; and
a circulation system for circulating the coolant between the evaporator unit and the condenser unit.


REFERENCES:
patent: 4109485 (1978-08-01), Grosskopf
patent: 4748824 (1988-06-01), Wakabayashi et al.
patent: 4936104 (1990-06-01), Hicke
patent: 5012653 (1991-05-01), Ryde et al.
patent: 5132257 (1992-06-01), Anderson et al.
patent: 5222373 (1993-06-01), Waldschmidt
patent: 5265435 (1993-11-01), Richardson
patent: 5878592 (1999-03-01), Borges et al.
patent: 5954578 (1999-09-01), Takasaki
patent: 6202434 (2001-03-01), Hearne, Jr.
patent: WO 99/00632 (1999-01-01), None
patent: WO99/00632 (1999-07-01), None

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