JPH0618150A - Refrigeration unit for container - Google Patents

Abstract

PURPOSE:To increase the amount of ventilation without increasing the area of a passage by disposing a ventilation fan oppositely to one of an exhaust passage and a suction passage each being in communication with an air passage to increase the flow velocity of the exhaust or the suction air as the revolution of the fan increases. CONSTITUTION:In a ventilation device 40, an evaporator 10 and an evaporator fan 12 are disposed in an air passage 15 for the air in a container. An exhaust passage 56 for exhausting the air in the container and a suction passage 57 for drawing fresh air of the outside are disposed respectively above and below the evaporator 10. For example, a ventilation fan 70 is provided oppositely to the passage 56 so that the fan 70 is rotationally driven when required by a motor 71, whereby the flow velocity of the air in the container flowing through the passage 56 is increased, thereby increasing the amount of the air in the container being exhausted from the passage 56. And at the same time, the amount of fresh air of the outside flowing in through the passage 57 is increased to increase the quantity of ventilation air.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a refrigerating unit for a container.

[0002]

2. Description of the Related Art A conventional container is shown in FIG.
The container 1 has a rectangular parallelepiped shape, and a refrigeration unit 100 is attached to one end wall 2 of the container 1. By storing the cargo in the container 1 through a door (not shown) provided on the other end wall of the container 1 and operating the refrigeration unit 100, the air temperature inside the container 1 is kept within the range of -30 ° C to + 25 ° C. The container 1 is carried on a vessel, a truck, a railroad vehicle, etc., while being maintained at a temperature arbitrarily set by.

A schematic structure of the refrigerating unit 100 is shown in FIG. 7, where (A) is a front view, (B) is a sectional view taken along the line BB of (A), and (C) is a rear view. . The gas refrigerant discharged from the compressor 3 enters the water-cooled condenser 5 or the air-cooled condenser 4 and is condensed and liquefied there. This liquid refrigerant is a dryer 7,
After passing through the strainer 8 and entering the electronic expansion valve 9, it is throttled here and adiabatically expanded to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10, where it evaporates and vaporizes by cooling the air in the refrigerator blown from the evaporator fan 12 driven by the motor 11. Then, this gas refrigerant returns to the compressor 3 via the accumulator 13.

Air inside the container 1 enters the suction chamber 15 from the suction port 14 as shown by the solid arrow, is urged by the evaporator fan 12, and then is cooled in the process of passing through the evaporator 10. Return to the container 1 through the air passage 16 and the blowout chamber 18.

When the air-cooled condenser 4 is used, the motor
The condenser fan 6 is driven by 17. Then, the outside air is heated by exchanging heat with the gas refrigerant in the process of flowing through the air-cooled condenser 4 as shown by a dashed arrow, and then is urged by the condenser fan 6 to be discharged.

When using the water-cooled condenser 5, a water supply pipe and a discharge pipe (not shown) are connected to the cooling water inlet 19 and the cooling water outlet 20, and the water control valve 21 is opened. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 through the water pipe (not shown) from the cooling water inlet 19 and heats up there by exchanging heat with the gas refrigerant. The water is discharged from the cooling water outlet 20 through the water valve 21 and the discharge pipe.

Drain condensed on the evaporator 10 is dropped on the drain pan 22 and is passed through the drain pipe 23 to the drain port.
Emitted from 24.

Reference numeral 25 is a control box, 26 is a solenoid valve for liquid injection for injecting and cooling a liquid refrigerant into the compressor 3, 27 is a plug for 200V class power source, 28
Is a plug for 400V class power supply, 29 is a power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air inside the evaporator 10 that is sucked into the evaporator 10, 30 is a thermometer insertion port for checking the temperature sensor 31, 33 is a blown air temperature sensor for detecting the temperature of the air blown from the evaporator 10, 32 is the insertion port of the check thermometer of this temperature sensor 33, 34 is for detecting the temperature of the refrigerant outlet of the evaporator 10. An outlet temperature sensor, 35 is an overheat prevention sensor, 36 is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air cooling condenser 4, 38 Is an inspection lid for inspecting the equipment in the suction chamber 15, 39 is a handle for attaching and detaching the inspection lid 38, and 40 is a ventilation device.

Reference numeral 41 denotes an inner and outer partition wall, which is fastened to the end wall 2 of the container 1 by a flange formed on the entire circumference thereof. A recess 42 is formed in the center of the lower part of the partition wall 41, and the compressor 3, the air-cooled condenser 4, the water-cooled condenser 5, the condenser fan 6 and the like are installed in the recess 42. Then, the suction chamber 15 is provided above the recess 42, and the air passages 16 are provided on both sides.
Blow-off chambers 18 are formed on the lower side, respectively. This inhalation chamber
An evaporator 10, an evaporator fan 12 and the like are installed inside 15.

Details of the ventilation device 40 are shown in FIG. 6, where (A) is a front view and (B) is a sectional view taken along the line BB of (A). A ventilation lid 50 is rotatably supported on the outer surface of the inner and outer partition walls 41 by bolts 51 and nuts 52 ', and an exhaust hole 52 and an intake hole 53 are formed in the ventilation lid 51. A gasket 55 is adhered to the back surface of the ventilation lid 50.

However, when the inside of the container 1 is ventilated, the ventilation lid 50 is rotated around the bolt 51 so that its exhaust hole is opened.
When 52 is aligned with the exhaust passage 56 and the intake hole 53 is aligned with the intake passage 57, the air in the refrigerator is exhausted from the upstream side of the evaporator 10 to the exhaust passage 5.
6, exhausted to the outside through the exhaust hole 53, and at the same time fresh outside air passes through the intake hole 53 and the intake passage 57, and the evaporator 10
Is inhaled downstream.

In FIG. 6, 41A is an outer panel, 41B is an inner panel, and 41C is a heat insulating material filled between them, which form the inner and outer partition walls 41. 58 is an intake pipe, 59 is an exhaust pipe, and each is an internal / external partition wall 41
Is attached so that the outer end thereof is inclined downward.

[0013]

In the above-mentioned conventional container refrigeration unit, the ventilation amount is determined by the areas of the exhaust passage 56 and the intake passage 57, but there is a limit to increase these areas, and therefore, There is a problem that a cargo requiring a large ventilation such as fruits and fresh vegetables cannot be stored in the container 1 and transported.

[0014]

The present invention has been invented to solve the above-mentioned problems, and the gist of the first invention is that an evaporator fan is provided in the air flow path of the air in the container. And an evaporator, which is sequentially arranged, and is provided with a ventilation device having an exhaust passage for discharging the air inside the container flowing in the air flow path to the outside and an intake passage for introducing the fresh air outside to the air flow path. A refrigeration unit for a container, characterized in that a ventilation fan is disposed so as to face either one of the exhaust passage and the intake passage.

By disposing one of the evaporator fans so as to face the exhaust passage, it can be used also as the ventilation fan.

The gist of the second invention is that an evaporator fan and an evaporator are sequentially arranged in the air flow path of the air in the container, and an exhaust passage for discharging the air in the container flowing in the air flow passage to the outside. In a container refrigeration unit provided with a ventilation device having an intake passage for introducing fresh air from the outside into the air passage, a ventilation passage for large ventilation is provided in addition to the exhaust passage and the intake passage. A refrigeration unit for a container, characterized in that a ventilation fan is arranged in the.

[0017]

According to the first aspect of the present invention, the amount of air passing through the exhaust passage and the intake passage, that is, the ventilation amount is increased by operating the ventilation fan.

If one of the evaporator fans is arranged so as to face the exhaust passage, the air inside the container urged by the evaporator fan is discharged through the exhaust passage.

In the second aspect of the invention, the ventilation fan is operated to perform ventilation through the ventilation passage for large ventilation.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the invention is shown in FIG. In the first embodiment, a ventilation fan 70 is arranged facing the inlet of the exhaust passage 56. Other configurations are similar to those of the conventional one shown in FIGS.

When a cargo requiring a large amount of ventilation is stored in the container 1, the motor 71 is started to drive the ventilation fan 70, so that the flow velocity of the air in the warehouse passing through the exhaust passage 56 is increased. As a result, the amount of air in the cold storage discharged from the exhaust passage 56 increases. Along with this, the amount of fresh air flowing into the container 1 through the intake passage 57 also increases, so that the ventilation amount increases.

A second embodiment of the invention is shown in FIG. In the second embodiment, a ventilation fan 72 is arranged facing the outlet of the intake passage 57. Other configurations are similar to those of the conventional one shown in FIGS.

However, the ventilation fan 72 is connected to the motor 73.
Driven by the intake air passage 57, the amount of fresh air sucked in through the intake passage 57 increases, and as a result, the exhaust passage 56 increases.
Since the amount of air in the refrigerator exhausted through the chamber also increases, the ventilation amount increases.

FIG. 3 shows a third embodiment of the present invention. In the third embodiment, the evaporator fan located on the upstream side of the ventilation device 40, that is, the evaporator fan 12 at the center is disposed so as to be slightly inclined so as to face the exhaust passage 56. Other configurations are similar to those of the conventional one shown in FIGS.

However, since the in-compartment air urged by the evaporator fan 12 is blown into the exhaust passage 56, the amount of the in-compartment air discharged through the exhaust passage 56 increases. The amount of fresh ambient air drawn into the container 1 through the passage 57 also increases.

FIG. 4 shows a fourth embodiment of the present invention. In the fourth embodiment, the ventilation pipe 74 is embedded in the inner and outer partition walls 41 so as to be adjacent to the exhaust passage 56, so that the ventilation passage 75 for large ventilation is provided in addition to the exhaust passage 56 and the intake passage 57. A ventilation fan 77 driven by a motor 76 is provided in the ventilation passage 75. The ventilation lid 50 is provided with a ventilation hole 78 that can be aligned with the ventilation passage 75. Other configurations are similar to those of the conventional one shown in FIGS.

When a cargo requiring a large amount of ventilation is accommodated in the container 1, the ventilation hole 78 is moved to the ventilation passage 74 when the ventilation lid 50 is rotated to the position shown in FIG. 4 (A). Exhaust hole 52
Is aligned with the exhaust passage 56, and the intake hole 53 is aligned with the intake passage 57. Therefore, if the ventilation fan 77 is driven by the motor 76, the air in the refrigerator is exhausted through the exhaust passage 56 and the intake passage 57, and at the same time the indoor air is exhausted through the ventilation passage 75 and the ventilation hole 78.
The amount of ventilation increases by this amount.

When a normal cargo is stored in the container 1, the ventilation lid 50 is rotated to the position shown in FIG. 4 (C). Then, since the exhaust hole 52 is aligned with the intake passage 57 and the intake hole 53 is aligned with the exhaust passage 56, the same exhaust amount as the conventional one can be obtained. At this time, the ventilation passage 75 is closed by the ventilation lid 50, and the ventilation fan 77 is not driven.

When a cargo that does not require ventilation is stored in the container 1, the ventilation lid 50 is rotated to the position shown in FIG. 4 (D). Then, the exhaust passage 56, the intake passage 57, and the ventilation passage 75 are closed by the ventilation lid 50.

[0030]

According to the first aspect of the present invention, since the ventilation fan is disposed so as to face either the exhaust passage or the intake passage, operating the ventilation fan reduces the passage area of the exhaust passage and the intake passage. The ventilation rate can be increased because the flow rate of air through them can be increased without increasing.

If one of the evaporator fans is arranged so as to face the exhaust passage, the evaporator fan can also be used as a ventilation fan, and the air in the container urged by the evaporator fan passes through the exhaust passage. Since a large amount is discharged, the ventilation volume increases.

In the second aspect of the invention, the ventilation passage for large ventilation is provided in addition to the exhaust passage and the intake passage, and the ventilation fan is arranged in this ventilation passage. In addition to the ventilation amount that is ventilated through the passage and the intake passage, the ventilation amount is increased because ventilation is performed through the ventilation passage for large ventilation.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 4 shows a fourth embodiment of the present invention, (A) is a front view of a ventilation device, (B) is a vertical sectional view taken along the line BB of (A), (C).
FIG. 4A is a front view showing a state during normal ventilation, and (D) is a front view showing a state during non-ventilation.

FIG. 5 is a perspective view of a conventional container.

FIG. 6 shows an example of a conventional ventilation device, (A) is a front view,
(B) is a longitudinal sectional view taken along the line BB of (A).

FIG. 7 is a schematic configuration diagram of a conventional container refrigeration unit, (A) is a front view, (B) is a sectional view taken along the line BB of (A), and (C) is a rear view. is there.

[Explanation of symbols]

 15 Air flow path 12 Evaporator fan 10 Evaporator 40 Ventilator 56 Exhaust passage 57 Intake passage 70 Ventilation fan

Claims (3)

[Claims] 1. An evaporator fan and an evaporator are sequentially arranged in an air flow path of the air in the container, and an exhaust passage for discharging the air in the container flowing in the air flow path to the outside, and fresh air outside. A container refrigeration unit provided with a ventilation device having an intake passage introduced into an air flow path, characterized in that a ventilation fan is arranged opposite to either the exhaust passage or the intake passage. Refrigeration unit. 2. The refrigerating unit for a container according to claim 1, wherein one of the evaporator fans is disposed so as to face the exhaust passage, and is also used as the ventilation fan. 3. An evaporator fan and an evaporator are sequentially arranged in an air flow path of the air in the container, and an exhaust passage for discharging the air in the container flowing in the air flow passage to the outside and fresh air outside the air flow. In a container refrigeration unit provided with a ventilation device having an intake passage introduced into a passage, a ventilation passage for large ventilation is provided in addition to the exhaust passage and the intake passage, and a ventilation fan is provided in this ventilation passage. Refrigeration unit for containers characterized by.