JPS5825244Y2 - Refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigeration system that includes a control equipment box that houses electrical control equipment for the refrigeration system, and that circulates cold air into a room to be cooled by a fan attached to an evaporator.

For example, in a refrigeration system that is used under conditions of high ambient temperature, such as a marine container refrigeration system that is exposed to direct sunlight during transportation, the temperature inside the control equipment box also increases as the surrounding temperature rises.

Further, even when the control equipment box is placed near a compressor or a condenser, the temperature inside the control equipment box may similarly rise due to heat released during operation of the device.

For this reason, in conventional refrigeration equipment, the electric control equipment housed in the box is required to use heat-resistant resin, heat-resistant paint, heat-resistant wires, etc. of high heat-resistant grade, but this comes at a high cost. The lifespan of electrical control equipment is short, and electronic equipment such as integrated circuits has low heat resistance and must be used under appropriate temperature conditions, so these electronic equipment cannot be used as electrical equipment. There was a problem.

In view of the current situation, the present invention aims to provide a refrigeration system that can cool the inside of a control equipment box with an extremely simple structure.

First, an embodiment of the present invention will be described based on the drawings. FIG. 1 shows a refrigeration system applied to a sea container, where 1 is a cooled chamber covered with a heat insulating wall 2, and 3 is a cooled chamber 1-. A housing section for compressors, condensers, etc. is provided on the outer surface of the side heat insulating wall 2, and 4 is an evaporator interposed between the heat insulating wall 2 and the partition wall 5, and is attached to the top of the evaporator 4. Due to the operation of fan F,
The cold air cooled by heat exchange with the evaporator 4 flows into the duct 6.
It is configured to circulate into the room to be cooled 1 via a return port at the lower end of the partition wall 5 or the like.

Reference numeral 7 denotes a waterproof electrical component box attached to a suitable external location of the heat insulating wall 2, such as on the side of the storage section 3, and is used as an electronic device to control the refrigeration system, such as starting/stopping the compressor and operating the fan F. A control equipment box 8 containing electrical control equipment is installed inside.

As shown in FIG. 2, the control equipment box 8 is provided with a cold air introduction pipe 9A and a discharge pipe 9B.
is on the delivery side of the fan F, and the discharge pipe 9B is on the delivery side of the fan F.
They are each opened on the suction side.

Commercially available vinyl tubes are used for the cold air introduction pipe 9A and the discharge pipe 9B.

According to the above configuration, when the fan F is operated to circulate cold air into the cooled chamber 1, the pressure on the delivery side of the fan F becomes high;
The pressure is low on the suction side.

Therefore, due to the pressure difference between the two, a part of the circulating cold air is also circulated through the cold air introduction pipe 9A and the discharge pipe 9B to the control equipment box 8, and the inside of the control equipment box 8 is cooled by this circulating cold air. The ambient temperature of electrical control equipment can be maintained within an appropriate temperature range.

Therefore, it is possible to reduce costs by using low heat-resistant grade electrical control equipment, while extending its lifespan. It is also possible to use this method, and it is also effective for downsizing the electrical component box 7.

Although not shown, the control equipment box 8
Alternatively, the portions of the cold air introduction pipe 9A and the discharge pipe 9B located outside the heat insulating wall 2 may be insulated by attaching a heat insulating material or the like.

In addition, when opening the cold air introduction pipe 9A and the discharge pipe 9B to the delivery side and suction side of the fan F, appropriate positions can be selected.

For example, as shown in FIG. 3, if the fan F is a suction type attached to the downstream side of the evaporator 4, the cold air introduction pipe 9A is opened on the delivery side of the fan F, and the discharge pipe 9B is opened on the outlet side of the fan F. 3
Between the solid line fan F and the evaporator 4, that is, the evaporator 4
The discharge pipe 9B may be opened on the outlet side of the evaporator 4, or may be opened on the inlet side of the evaporator 4 as shown in the imaginary line in FIG.
When the air is opened on the inlet side of the evaporator 4, the air that passes through the control equipment box 8 absorbs heat and becomes warm air can be cooled in the evaporator 4, so that it does not affect the temperature inside the room to be cooled 1. At the point,
This is more preferable than opening on the outlet side of the evaporator 4.

As shown in FIG. 4, if the fan F is a push-in type attached to the upstream side of the evaporator 4, the cold air introduction pipe 9A
There are cases in which the openings are made on the inlet side of the evaporator 4 as shown by solid lines in FIGS. 2 and 4, and cases in which they are made open on the outlet side of the evaporator 4 as shown in phantom lines in the same figures.

If the opening is made on the exit side of the evaporator 4, the evaporator 4 will act as a resistance, and the pressure near the opening will be slightly lower; Since it is introduced, a sufficient cooling effect can be exerted.

Moreover, when the cold air introduction pipe 9A is opened between the fan F and the evaporator 4, the pressure near the opening is high, and the above-mentioned differential pressure allows the amount of cold air to be circulated to be increased.

Therefore, even if the cold air that has not passed through the evaporator 4, that is, returns to the evaporator 4 via the cooled chamber 1, is introduced into the control equipment box 8, a sufficiently high cooling effect can be obtained.

As described above in detail based on the examples, in the present invention,
A control equipment box that houses the electric control equipment of the refrigeration equipment is provided with a cold air introduction pipe and an exhaust pipe, and the cold air introduction pipe is placed on the delivery side of a fan for circulating cold air into the room to be cooled, and the exhaust pipe is placed on the delivery side of a fan for circulating cold air into the room to be cooled. Since the openings are made on the suction side of the fan, the pressure on the delivery side becomes high and the pressure on the suction side becomes low as the fan operates, and due to the pressure difference, part of the cold air circulating in the room to be cooled is circulated to the control equipment box. The inside of the box can be cooled.

Therefore, there is no need to use special circulation pumps, circulation fans, etc., and the structure is extremely simple, just by providing a small-diameter cold air introduction pipe and a discharge pipe, and opening them on the fan's delivery side and suction side. This allows the inside of the control equipment box to be cooled.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the refrigeration system according to the present invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a partially cutaway front view, and Figs. 3 and 4 show the openings of the cold air introduction pipe and the discharge pipe. It is a schematic diagram which illustrates a position. 1...Cooled chamber, 4...Evaporator, 8.
...Control equipment box, 9A...Cold air introduction pipe,
9B...Discharge pipe, F...Fan.

Claims (1)

[Scope of utility model registration request] Equipped with a control equipment box that houses the electrical control equipment of the refrigeration equipment,
In a refrigeration system in which cold air is circulated through a room to be cooled by a fan attached to an evaporator, the control equipment box includes:
1. A refrigeration system comprising: a cold air introduction pipe and a discharge pipe; the cold air introduction pipe is opened on the delivery side of the fan, and the discharge pipe is opened on the suction side of the fan.