JPH074820A - Container freezing and refrigerating device - Google Patents

Abstract

PURPOSE:To let cooled air discharged from an air outlet of a vaporizer unit to flow all over cargoes in a container by installing a sub-air inlet and a sub-air outlet to the lower part of the vaporizer unit and allowing a part of inside air to bypass a heat exchanger and then to be discharged. CONSTITUTION:A bypass flow passage 12 is installed to the lower part of an air outlet 9 of a vaporizer unit 3 in which the bypass flow passage is provided with a sub-air inlet 10' and a sub-air outlet 10 and laid out before and after a fan 4, and what is more, it is designed to bypass a heat exchanger 5. The fan 4 forces a part of inside air to flow in the bypass flow passage 12 as a bypass flow 11 and blows off the air to the lower part of the air outlet 9 from the sub-air outlet 10. Since the bypass flow 11 bypasses the heat exchanger 5 and does not heat-exchange, the flow temperature is relatively high and the relatively hot air is blown off from the sub-air outlet 10, which makes it possible to inhibit a drop in the temperature of the air 7 blown off from the air outlet 9 before its arrival at the depth of a container 2 due to thermal buoyancy. It is, therefore, possible to freeze or refrigerate all cargoes to a satisfactory extent even if the velocity of the air 7 blown off from the air outlet 9 is slow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating / refrigerating apparatus for containers for sea transportation, land transportation and the like.

[0002]

2. Description of the Related Art An evaporator unit of a conventional refrigerating / refrigerating apparatus for shipping containers will be described with reference to FIG. The evaporator unit 3 suspended in the container 2 in which the load 1 is loaded is provided with a blower 4, a heat exchanger 5, and a wind direction control louver 6. As shown by the arrow, the air 7 in the container is sucked in through the suction port 8, passes through the heat exchanger 5 and the blower 4, is blown out through the outlet 9, circulates in the space inside the container 2, and cools the load 1. is doing.

[0003]

The conventional container freezing / refrigerating apparatus described above has the following problems to be solved. That is, the air 7 exiting the outlet 9 is blown out at a predetermined flow velocity so as to reach the inside of the container 2, but if the flow velocity is not sufficiently high, the air 7 does not reach the inside of the container 2,
Due to the influence of the thermal buoyancy, the load 1 and the container 1 and the container 2 are lowered in the middle of the load, and as a result, the load at the back of the container 2 cannot be sufficiently frozen or refrigerated.
Further, in order to increase the flow velocity of the air 7 that exits the air outlet 9, it is necessary to increase the rotation speed of the blower 4, resulting in a problem of increased input.

The present invention is intended to provide a refrigerating / refrigerating apparatus for containers which can solve the above problems.

[0005]

[Means for Solving the Problems]

(1) The present invention is characterized in that a sub-suction port and a sub-blowing port are provided in the lower part of the blow-out port of the evaporator unit, and a part of the air in the refrigerator is blown out by bypassing the heat exchanger. . (2) Further, the present invention is characterized in that a sub-blower is provided between the sub-intake port and the sub-blow-out port of the present invention in (1) above.

[0006]

The present invention described in (1) above has the following operation because it is configured as described above.

That is, since a part of the inside air having a relatively high temperature which does not perform heat exchange bypassing the heat exchanger is blown out from the sub outlet 10, the air blown out from the outlet reaches the inside of the container. It suppresses the downward movement due to the effect of thermal buoyancy and allows the air blown from the outlet to reach the inside of the container even if the air velocity at the outlet is smaller than before, so that the entire cargo is fully frozen or refrigerated. It becomes possible to do. Further, since the bypass flow does not pass through the heat exchanger, its flow path resistance is small, and its driving power can be made sufficiently small, the input increase as a unit can be suppressed as much as possible, and the cargo in the container can be efficiently loaded. It can be frozen or refrigerated.

In the present invention described in (2) above, the air flow bypassing the heat exchanger blown out from the sub outlet is sent by the sub blower, and this air flow can be maintained reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First to third embodiments of the present invention will be described with reference to FIGS. 1 to 3, the same parts as those of the conventional device shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

In the first embodiment of the present invention shown in FIG. 1, the evaporator unit 3 has a sub-inlet 10 'and a sub-outlet 10 at the lower part of the blow-out port 9 and is arranged in front of and behind the blower 4, and ,
A bypass flow path 12 that bypasses the heat exchanger 5 is provided. The blower 4 is arranged such that its rotating blades are partially located in the bypass flow passage 12.

In the first embodiment, the blower 4
A part of the air in the refrigerator bypasses the heat exchanger 5 as a bypass flow 11 and flows through the bypass flow passage 12 and is blown out from the sub outlet 10 below the outlet 9. This bypass flow 11
Has a relatively high temperature because it does not perform heat exchange by bypassing the heat exchanger 5.
The air blown from the outlet to blow out from 0
Can be prevented from descending due to the influence of thermal buoyancy before reaching the inside of the container 2. Therefore, even if the flow velocity of the air 7 at the outlet 9 is small, the same air 7 can reach the back of the container 2 and the entire load 1 can be sufficiently frozen or refrigerated. Also, the bypass flow 1
Since 2 flows by bypassing the heat exchanger 5, its flow path resistance is small, an increase in input as a unit can be suppressed, and the cargo 1 in the container 2 can be efficiently frozen or refrigerated.

In the second embodiment of the present invention shown in FIG. 2, the blower 4 is arranged upstream of the heat exchanger 5 and the auxiliary suction port 10 'is provided.
A bypass passage 12 that has a sub outlet 10 and bypasses the heat exchanger 5 is arranged below the outlet 9 and the heat exchanger 5. In addition, a part of the air 7 sent from the blower 4 flows in the bypass flow passage 12 as a bypass flow 11.

Also in the second embodiment, the same operation and effect as those of the first embodiment can be obtained.

In the third embodiment of the invention shown in FIG. 3,
In the first embodiment, the sub blower 13 is provided between the sub suction port 10 ′ and the sub blow port 10 of the bypass flow passage 12.

In the third embodiment, in addition to the operation and effect of the first embodiment, the air 11 which flows through the bypass passage 12 by the auxiliary blower 13 and is blown out from the auxiliary outlet 10 is surely provided. Can be maintained.

[0016]

Since the present invention has the structure described in each claim, it has the following effects.

That is, the air flow blown out from the sub outlet is
In order to bypass the heat exchanger, the temperature is higher than the air blown from the air outlet, and the air blown from the air outlet is sufficiently suppressed from falling due to the thermal buoyancy before reaching the depth of the container. Allow the air to reach the back of the container,
It is possible to sufficiently freeze or refrigerate all the cargo. Further, as described above, the air flow blown out from the sub-outlet bypasses the heat exchanger so that the flow path resistance is small, and the power required to drive this bypass flow is small, so high efficiency and high efficiency are achieved. It is possible to provide a freezing / refrigerating device for a high-performance container.

[Brief description of drawings]

FIG. 1 (a) is a vertical sectional front view of a first embodiment of the present invention, and FIG. 1 (b) is a vertical sectional side view thereof.

FIG. 2 (a) is a vertical sectional front view of a second embodiment of the present invention, and FIG. 2 (b) is a vertical sectional side view thereof.

FIG. 3 (a) is a vertical sectional front view of a third embodiment of the present invention, and FIG. 3 (b) is a vertical sectional side view thereof.

FIG. 4 (a) is a vertical sectional front view of a conventional transport container freezing / refrigerating apparatus, and FIG. 4 (b) is a vertical sectional side view thereof.

[Explanation of symbols]

 1 Cargo 2 Container 3 Evaporator unit 4 Blower 5 Heat exchanger 6 Wind direction control louver 7 Air 8 Suction port 9 Blowout port 10 Sub-blowout port 10 'Sub-suction port 11 Bypass flow 12 Bypass flow path 13 Sub-blower

Claims (2)

[Claims] 1. A container, characterized in that a sub-suction port and a sub-blowing port are provided at a lower portion of the blow-out port of the evaporator unit so that a part of the air in the refrigerator is blown out by bypassing the heat exchanger. Freezer / refrigerator. 2. The container refrigerating / refrigerating apparatus according to claim 1, further comprising a sub-blower provided between the sub-suction port and the sub-blow port.