JPH01222199A - Cooling apparatus - Google Patents

Abstract

PURPOSE:To improve the reliability of a cooler for an erosion of a passage for feeding a refrigerant and easily remove dust etc. with which the passage is inside or outside by providing a feeding direction switching unit for alternately reversing the flow of the refrigerant. CONSTITUTION:A pair of heat exchangers 1 are connected through flowing direction switching units 2 to a tank 3, and the unit 2 can reverse the flowing direction of refrigerant flowing in the exchanger 1. When the refrigerant flows in a direction of an arrow 10, the inner face of a passage 9 in the exchanger 11 is eroded at a position 11 where the refrigerant collide and a position 12 where the flow of the refrigerant is largely disordered. When the refrigerant flows in a direction of an arrow 20, the inner face of the passage 9 is eroded at a position 21 where the refrigerant collides and a position 22 where the flow of the refrigerant is largely disordered. When the flowing direction of the refrigerant is alternately reversed by the unit 2, the positions to be eroded of the passage 9 are dispersed, the erosion amount per one position is reduced by half, thereby extending the life of the passage 9. If dust and the like are filled in the fins in the exchanger 1, when the flowing direction of the refrigerant in the exchanger 1 is reversed, the dusts are separated from the fins, and collected by a filter 7.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention improves the erosion resistance of the flow path in a heat exchanger, and also improves the corrosion resistance of the flow path in a heat exchanger, and eliminates dust or deposits that clog the fins in the heat exchanger (hereinafter referred to as This invention relates to a cooling device that can easily remove dust, dirt, etc.

[Conventional technology]

Generally, in a cooling system that uses a refrigerant, such as a water cooling system for a power generator, the refrigerant circulates from a tank to a pump to a heat exchanger to a tank, and the refrigerant always flows in a fixed direction.

However, recently, as heat exchangers have become more efficient, it has become necessary to flow refrigerant at high speed. For this reason, in areas where the refrigerant flow path is sharply bent (such as curved pipes),
The refrigerant collides with the inner surface of the heat transfer tube, and corrosion is likely to occur at such locations.

Therefore, a technique has been proposed to avoid the refrigerant from colliding with the inner surface of the bent pipe by making the radius of bend as large as possible ([Latest Corrosion Prevention Design and Engineering], 1983).
), Jadek Publishing, P147-148).

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, since the flow direction of the refrigerant is always constant, once erosion occurs on the inner surface of the bent tube, the erosion progresses rapidly, resulting in a disadvantage that the life of the heat exchanger tube is significantly shortened. was there. Furthermore, in the conventional technology, if the fins of the flow path become clogged with dust etc. during operation, no consideration is given to removing it, and if the heat exchanger is used with dust etc. clogged, the heat exchanger There was also the problem that the functionality of the system deteriorated. Note that in this case, the refrigerant mainly flows outside the flow path.

An object of the present invention is to provide a cooling device that can improve the reliability of a channel through which a refrigerant flows against erosion, and facilitate the removal of dirt or the like that is clogged inside or outside the channel.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a cooling device that provides a flow path in contact with an object to be cooled and cools the object by flowing a refrigerant in the flow path, in which the flow direction of the refrigerant is It is equipped with a flow direction switching section that alternately reverses the flow direction.

Further, in order to remove dust or the like that is clogged inside or outside the flow path, a filtration section that filters the refrigerant after cooling the object to be cooled is provided downstream of the flow direction switching section;
It is also possible to provide a physical quantity detection unit that detects the physical quantity of the refrigerant before and after cooling the object to be cooled.

[Effect]

According to the above configuration, when the flow direction of the refrigerant is reversed by the flow direction switching unit after flowing the refrigerant in a certain direction for a certain period of time in the flow path, the refrigerant collides with the inner surface of the bend at the bend in the flow path. moves to a different location from where it was before the flow reverses.

That is, by reversing the flow direction of the refrigerant, there are two positions at which the refrigerant collides at the bend. For this reason, the amount of erosion per location is reduced by half compared to when the refrigerant flows in a constant direction, and the life of the flow path is extended by that amount.

Further, a filtration section is provided on the downstream side of the flow direction switching section, and when the fins on the outer surface of the flow path are clogged with dust, the flow direction of the refrigerant is reversed by the flow direction switching section,
To easily remove dust, etc. from fins, etc., and capture and collect the dust, etc. with a filter. In this case, if you install a physical quantity detection unit that detects physical quantities (pressure, temperature, flow rate, etc.) before and after cooling the object, you can automatically detect that the fins are clogged with dirt. By feeding back the detection signal to the flow direction switching section, automation of the removal of dust and the like can be achieved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention. As shown in FIG. 6, a pair of heat exchangers 1 are each connected to a tank 3 via a flow direction switching section 2. There is.

A pump 5 is provided between the tank 3 and the flow direction switching section 2, and the pump 5 circulates the refrigerant 4 in the tank 3 as shown by the arrow in the figure. One of the pair of heat exchangers 1 is for cooling the heating element, and the other is for cooling the refrigerant 4.

Further, the flow direction switching unit 2 is capable of reversing the flow direction of the refrigerant flowing inside the heat exchanger 1.

Next, the operation of this embodiment will be explained using FIG. 2.

As shown in the figure, when the refrigerant is flowing in the direction of the arrow 10, the inner surface of the flow path 9 in the heat exchanger 1 is corroded at a position 11 where the refrigerant collides and at a position 12 where the flow of the refrigerant is greatly disturbed. occurs. Further, when the refrigerant is flowing in the direction of the arrow 20, erosion occurs on the inner surface of the flow path 9 at a position 21 where the refrigerant collides and at a position 22 where the flow of the refrigerant is greatly disturbed.

Therefore, when the flow direction of the refrigerant flowing in the flow path 9 is alternately reversed by the flow direction switching unit 2, the positions where the flow path 9 is eroded are dispersed, and when the refrigerant is flowing in a fixed direction as in the past, Compared to this, the amount of erosion per location is reduced by half. As a result, the life of the flow path 9 is extended and the reliability of the heat exchanger 1 is improved.

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention. In this embodiment, a filter 7 as a filtration section is added to the above-mentioned first embodiment. passes through the filter 7.

If the fins in the heat exchanger 1 become clogged with dirt, etc., the flow direction switching unit 2 is activated to reverse the flow direction of the refrigerant in the heat exchanger 1, and the dirt is separated from the fins. Separated dust and the like are captured by a filter 7.

(Third Embodiment) FIG. 4 shows a third embodiment of the present invention. This embodiment is obtained by adding a physical quantity detection section 8 to the above-mentioned second embodiment. This physical quantity detection unit 8 detects physical quantities (pressure, temperature, flow rate, etc.) at the inlet and outlet of the heat exchanger 1, and outputs a signal to the flow direction switching unit 2 when the detection result is determined to be an abnormal value. , the flow direction of the refrigerant in the heat exchanger 1 may be reversed.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to disperse the erosion points of the flow path and reduce the amount of erosion per point, thereby making it possible to extend the life of the flow path.
The reliability of the cooling system is improved.

In addition, even if the flow path is clogged with dirt or the like,
The filtration section makes it possible to easily remove the dust and the like. Furthermore, by installing a physical quantity detector,
Removal of garbage, etc. can be automated.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a cooling system including a cooling device according to the present invention;
Fig. 2 is a partial sectional view of a heat transfer tube in a heat exchanger, Fig. 3 is a system diagram showing a second embodiment of the present invention, and Fig. 4 is a partial cross-sectional view of a heat transfer tube in a heat exchanger.
It is a system diagram showing an example. 1... Heat exchanger, 2... Flow direction switching unit,
3...Tank, 4...Refrigerant. 5...Pump, 7...Filter, 8...
-Physical quantity detection unit, 9...Flow path, 10.20...Flow direction of refrigerant, 11.21...Position subjected to erosion.

Claims (1)

[Claims] 1. In a cooling device that provides a flow path in contact with an object to be cooled and cools the object by flowing a refrigerant into the flow path, the flow direction of the refrigerant is alternately reversed. A cooling device characterized by being provided with a flow direction switching section. 2. The cooling device according to claim 1, wherein a filtration section for filtering the refrigerant after cooling the object to be cooled is provided downstream of the flow direction switching section. 3. The cooling device according to claim 2, further comprising a physical quantity detection unit that detects the physical quantity of the refrigerant before and after cooling the object to be cooled.