JPH0328283Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a circulation type cooling device that involves a gas-liquid phase change. The present invention relates to a cooling device that can be installed horizontally and vertically.

(Prior art) Electrical equipment boxes such as control panels with built-in electrical and electronic equipment, telephone exchange boxes with built-in electronic exchangers, etc.
It is necessary to cool the electrical and electronic items inside.
A cooling system is attached to the system, but this type of cooling system connects a heat exchanger for heat dissipation, which serves as a condenser, and an evaporator located below the heat exchanger in a cyclic manner using liquid pipes and gas pipes. By performing natural circulation accompanied by a phase change of the condensable gas refrigerant, cooling by the latent heat of vaporization is continuously achieved on the evaporator side. It is also known by.

(Problems to be Solved by the Invention) By the way, in the conventional cooling device disclosed in the above publication, the evaporator is provided in the electrical equipment box, while the condenser is located at a different location higher than the evaporator. It is constructed by installing the electrical box and connecting it with a liquid pipe and a gas pipe, and the piping work for the liquid pipe and gas pipe must be done at the installation site of the electrical box, which is time consuming and uneconomical. However, since both tubes pass through the casing of the electrical box, drilling and sealing work is required, which is a hassle.

In this way, the present invention was developed to address the various practical inconveniences caused by the conventional separate installation type. It has a single shape that can be directly attached to the outer panel of objects to be cooled, such as, and has a structure that allows a single model to be used for both horizontal and vertical mounting, making it suitable for use in locations with small installation spaces. It also aims to facilitate on-site installation work.

(Means for Solving the Problems) The present invention partitions the inside of the casing 7 into two chambers 7a and 7b with a partition plate 14, and the heat exchanger 1 for heat dissipation serving as a condenser is placed in one chamber 7a, and the A cooling heat exchanger 2 serving as an evaporator is provided in the chamber 7b, and both the heat exchangers 1 and 2 are connected to the liquid pipe 3 via a partition plate 14.
and a gas pipe 4 to form a circulation system capable of circulating a condensable gas refrigerant accompanied by a phase change, and air inlets 9, 11 and air outlets 10, 12 are connected to the casing 7 for heat exchange between the two. The cooling device has openings corresponding to the heat exchangers 1 and 2, in which the casing 7 has a flange-shaped mounting plate 13 projecting from its outer periphery, and the casing 7 has a flange-like mounting plate 13.
A meandering refrigerant passage formed by arranging pipes in a continuous meandering manner within a plane that intersects with the mounting plate 13 at an acute angle is connected by a liquid pipe 3 and a gas pipe 4, and a number of fins are connected to the meandering refrigerant passage. When the casing mounting plate is positioned horizontally, the casing 7 is formed with a downward slope from the heat radiation heat exchanger 1 to the cooling heat exchanger 2. When the mounting plate 13 is positioned vertically and horizontally,
Both are characterized in that the heat exchanger 1 side for heat radiation is arranged at a higher position than the heat exchanger 2 side for cooling.

(Function) In the present invention, whether the casing 7 is mounted horizontally or vertically, the heat exchanger 1 for radiation is located at a higher position than the heat exchanger 2 for cooling, and a piping route adapted for circulation of the refrigerant is provided. can be formed.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

1 and 2 are explanatory diagrams showing the basic structure of the present invention, with FIG. 1 showing a vertical mounting mode and FIG. 2 showing a horizontal mounting mode, respectively.

In the drawing, 1 is a heat exchanger for heat radiation (hereinafter referred to as a radiator) that acts on a condenser, and 2 is a heat exchanger for cooling that acts on an evaporator (hereinafter referred to as a cooler). Reference numerals 1 and 2 are formed of air-type cross-fin coils, and are provided with fans 5 and 6, respectively, for forcing air to pass through them.

These two vessels 1 and 2 are divided into two chambers 7 by a partition plate 14.
It is housed in a casing 7 partitioned into sections a and 7b. The casing 7 has air inlets 9, 11, air outlets 10,
12 is open.

When both the radiator 1 and the cooler 2 are mounted vertically as shown in Figure 1, the connection ports at the top are connected to each other by a gas pipe 4, and the connection ports at the bottom are connected to each other by a liquid pipe 3. A receiver 8 is interposed between the gas pipe 4 and the liquid pipe 3 so as to straddle the portion located below the radiator 1 and above the cooler 2.

The receiver 8 separates the liquid phase and the gas phase and regulates the flow direction of the condensable gas refrigerant in a predetermined direction at the time of startup to stably exhibit cooling capacity. Heatsink 1 side pipe outlet and cooler 2
The gas pipe 4 is connected to the lower part of the receiver 8 so that both the side pipe inlet and the radiator 1 side pipe inlet communicate with the liquid phase, while the gas pipe 4 is connected to the gas phase with both the cooler 2 side pipe outlet and the radiator 1 side pipe inlet. It is connected to the top of the receiver 8 so as to communicate with the receiver 8.

And radiator 1, cooler 2, liquid pipe 3, gas pipe 4
A suitable amount of a condensable gas refrigerant, such as Freon R-22, is filled into a closed circuit consisting of the receiver 8 and the receiver 8.

The two containers 1 and 2 are fixed and housed in a casing (not shown) so that their mutual positional relationship remains unchanged, but at that time, each refrigerant flow path is connected to the casing as shown schematically by a solid straight line. It is provided so as to intersect at an acute angle with the plane A, that is, the vertical plane in FIG. 1 and the horizontal plane in FIG. The heat sinks 1 are arranged in parallel or nearly parallel positions at a high position.

With this configuration, the radiator 1 can be connected from the gas pipe 4 connection port to the liquid pipe 3 connection port in either the vertical arrangement (as shown in Fig. 1) or the horizontal arrangement (see Fig. 2). In the cooler 2, the refrigerant flow path slopes downward from the liquid pipe 3 connection port to the gas pipe 4 connection port, forming a path that follows the natural flow of the condensed refrigerant. Therefore, the path follows the natural flow of evaporative refrigerant.

Therefore, natural circulation accompanied by a phase change of the condensable gas refrigerant can be carried out smoothly and stably in both vertical and horizontal arrangements.

Of course, although not shown, there is a liquid pipe 3 connected to the cooler 2.
A pump for forcibly feeding the refrigerant liquid may be interposed therein, or a solenoid valve may be interposed therein to open and close in response to start and stop.

Embodiments that embody such a basic structure and make it suitable for practical equipment are shown in the figures from FIG. 3 onwards. The examples shown in FIGS. The inside of the casing 7 is formed by forming a mounting surface A on which a flange-shaped mounting plate 13 protrudes around one of the two wider facing surfaces, and the interior thereof is perpendicular to the mounting surface A at a center line portion. It is divided into two chambers (two chambers on the left and right in FIGS. 3 and 4) 7a and 7b by an upright partition plate 14,
In one chamber 7a, a filter 15, a radiator 1, and a set of two fans 5, 5 are housed in order from the mounting surface A side, and in the other chamber 7b, two fans are housed in order from the mounting surface A side.
A set of fans 6, 6 and a cooler 2 are stored,
The former chamber 7a is formed as a heat radiation chamber, and the latter chamber 7b is formed as a cooling chamber.

The chamber 7a of the heat dissipation chamber adiabatically closes the mounting surface A side, and air inlets 9, 9 are provided along the mounting surface on two side surfaces perpendicular to the partition plate 14 and facing each other. It has an opening in the form of an elongated rectangle, and an air outlet 10 is opened in the surface facing the mounting surface A, facing the fans 5, 5.

On the other hand, all three sides of the cooling chamber chamber 7b except the mounting surface A are closed, and the mounting surface A has an opening in the shape of an elongated rectangle that faces the fans 6, which are arranged in parallel. An air outlet 12 is provided, and air inlets 11, 11 are provided by opening each of the side portions sandwiching the air outlet 12 in an elongated rectangular shape.

Note that a partition 16 surrounding the sides of the cooler 2 and the fans 6, 6 is provided around the inside of the boundary between the air inlet 11 and the air outlet 12.

As is clear from FIGS. 3 and 4, the radiator 1 and the cooler 2 each have multiple meandering refrigerant flow passages in one pass, each consisting of tubes arranged in a continuous meandering manner within one plane. For example, a cross-fin heat exchanger is used, which has two systems and is formed by making a number of fins cross each other at right angles to share the refrigerant flow paths of the two systems that are placed close to each other in parallel.
The meandering refrigerant flow path intersects with the radiator 1 at an acute angle, and between the radiator 1 and the cooler 2, the meandering refrigerant flow path of the radiator 1 is located at a position farther from the mounting surface A. Moreover, they are installed so that they are on the same plane, and the vertical positional relationship is such that when the mounting surface A is positioned horizontally as shown in Fig. 4, there is a downward slope from the radiator 1 to the cooler 2. It is formed so that it exists.

The one-pass meandering refrigerant flow passage on the radiator 1 side and the one-pass meandering refrigerant flow passage on the cooler 2 side included in one plane are defined by the pipes closer to the partition 14, as shown in FIG. By connecting the end and the far end of the pipe to each other with piping, two independent closed circulation paths are formed.

A suitable amount of condensable gas refrigerant, such as Freon R-22, is filled in this closed circulation path to construct a refrigerant circulation system that undergoes a phase change.

In FIG. 3, 3 is a liquid pipe, 4 is a gas pipe, and inside the liquid pipe 3 is a liquid reservoir 17 for storing refrigerant.
is interposed, and this liquid reservoir 17 passes through the partition plate 14 and is fixed by a flange.

The cooling device thus constructed can be mounted both vertically and horizontally as shown in FIG. 6, and can be mounted horizontally as shown in FIG. When mounting on the top plate of the cooling chamber, first drill a square hole in the top plate that can match the mounting side opening surface of the cooling chamber and a small hole that corresponds to the screw hole formed in the mounting plate 13. The assembly is completed by placing the cooling device on the top plate at a predetermined location and fixing it with screws.

Thereafter, by connecting electric wires to the motors of each of the fans 5, 5, 6, and 6 and operating them to blow air, it is possible to cool the inside of the electrical equipment box.

In this case, in the illustrated example, there is a level difference of about 20 mm to 30 mm between the highest end of the meandering refrigerant flow path of the radiator 1 and the lowest end of the meandering refrigerant flow path of the cooler 2. Therefore, it is possible to perform stable heat transfer through natural circulation without using a pump. It evaporates by exchanging latent heat of vaporization with the air and cools the circulating air, and this evaporative refrigerant rises and reaches the radiator 1 via the gas pipe 4, where it exchanges the latent heat of condensation with the outside air sent by the fans 5, 5. It condenses and liquefies through heat exchange, and radiates heat to the outside air.

This liquefied refrigerant flows down the liquid pipe 3 under its own weight to the cooler 1.
It reaches the bottom of the tank and is used for cooling again.

In this way, the inside of the electrical box is continuously cooled by the circulation of the refrigerant accompanied by a gas-liquid phase change.

Although the above cooling device is not shown, it can be mounted vertically and can also be installed on the back plate or side plate of the electrical box.In this case, there is a sufficient head difference between heat radiation air 1 and cooling air 2, so the cooling capacity is large. Become.

(Effects of the invention) As detailed above, the present invention divides the inside of the casing into two chambers with a partition plate, and one chamber is equipped with a heat exchanger for heat dissipation that serves as a condenser, and the other chamber is equipped with a heat exchanger for cooling that serves as an evaporator. In a cooling device in which heat exchangers are respectively disposed and an air inlet and an air outlet are opened in a casing corresponding to the heat exchangers, the casing is provided with a flange-like attachment extending over the outer periphery of the cooling device. A serpentine refrigerant passage comprising a plate and a serpentine refrigerant passage in which the heat exchanger is arranged in a continuous meandering manner within a plane that intersects the heat exchanger at an acute angle with the mounting plate, and is connected by a liquid pipe and a gas pipe. The passage has a structure in which a large number of fins are arranged orthogonally to each other, and when the casing mounting plate is positioned horizontally, the fins are arranged at a downward slope from the radiation heat exchanger toward the cooling heat exchanger 2. By arranging the casing 7 so that when the mounting plate 13 of the casing 7 is positioned vertically or horizontally, the radiation heat exchanger 1 side is located at a higher position than the cooling heat exchanger 2 side, horizontal mounting,
Not only can two types of vertical mounting modes be realized with a single model, but also circulation accompanied by a phase change of the refrigerant can be performed smoothly and stably, so that the cooling capacity can be fully exhibited.

Furthermore, the installation work of this cooling device is easy.

[Brief explanation of the drawing]

Figures 1 and 2 are vertical and horizontal mounting diagrams showing the basic structure of the device of the present invention, and Figures 3 to 6 are diagrams showing the structure according to an embodiment of the present invention. Figure 3 is a plan view taken along the line of the arrow in Figure 4, Figure 4 is a front view taken along the line of the arrow in Figure 3, Figure 5 is a side view taken along the line of the arrow in Figure 4, and Figure 6. FIG. 2 is a perspective view showing an attachment mode. 1... Heat exchanger for heat radiation, 2... Heat exchanger for cooling, 3... Liquid pipe, 4... Gas pipe, 7... Casing, 7a, 7b... Chamber, 9, 11... Air inlet , 10, 12...Air outlet, A...Mounting surface.

Claims (1)

[Scope of utility model registration request] The interior of the casing 7 is divided into two chambers 7a and 7b by a partition plate 14.
A heat radiation heat exchanger 1 serving as a condenser is disposed in one chamber 7a, and a cooling heat exchanger 2 serving as an evaporator is disposed in the other chamber 7b. 2 are connected by a liquid pipe 3 and a gas pipe 4 via a partition plate 14 to form a circulation system capable of circulating a condensable gas refrigerant accompanied by a phase change. Outlet 10,1
2 are respectively opened corresponding to the heat exchangers 1 and 2, and the casing 7 is provided with a flange-shaped mounting plate 1 that protrudes from its outer periphery.
The liquid pipe 3 is a meandering refrigerant passage formed by arranging the pipes in a continuous meandering manner within a plane where the heat exchangers 1 and 2 intersect at an acute angle with the mounting plate 13.
It is formed by orthogonally intersecting a large number of fins in a meandering refrigerant passage connected by a gas pipe 4, and when the casing mounting plate is positioned horizontally, there is no heat exchange from the heat radiation heat exchanger 1 to the cooling heat exchanger 1. When the mounting plate 13 of the casing 7 is positioned vertically and horizontally with a downward slope toward the container 2, the heat exchanger 1 side for heat dissipation is located at a higher position than the side of the heat exchanger 2 for cooling. A cooling device characterized by: