JPH0569566U - Solution foreign matter removal device in absorption chiller / heater - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent clogging of the filter for removing foreign matter in the solution and reduce the maintenance work of the filter. The intermediate member 13 connecting the solution outlet 10 and the solution descending pipe 12 has a substantially cylindrical shape, the upper part of which is joined to the hole of the solution outlet 10 and the lower part of which is bent into an L-shaped cross section. It is joined to the solution downcomer 12. The solution descending pipe 12 having the filter 11 inside is arranged such that its tip is located above the joint with the intermediate member 13, and the tip and the intermediate member 13 form a reservoir 14.
A cap-shaped partition plate 15 is arranged above the tip of the solution descending pipe 12 and above the storage tank 14.
The peripheral edge of 5 is bent outward, and a narrow space is formed between the peripheral edge of the partition plate 15 and the intermediate member 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an absorption chiller / heater, and more particularly to a solution foreign matter removing device for removing foreign matter from a solution circulating in the absorption chiller / heater.

[0002]

[Prior Art]

 In general, the solution circulating in the absorption chiller-heater contains foreign substances such as metal powder (mainly welding spatter). The presence of such foreign matter is not preferable for normal operation of the solution pump. Therefore, conventionally, as shown in FIG. 9, a woven wire net (hereinafter referred to as a filter) 2 made of stainless steel wire is provided in the absorption / cooling water heater 1, and foreign matter is removed from the solution by the filter 2. ..

FIG. 10 shows in detail the portion where the filter 2 is provided. As shown in the figure, the filter 2 is provided in the solution descending pipe 4 attached to the solution outlet portion 3, and foreign matter is removed from the solution by flowing the solution with the pump 5 as shown by the arrow in the figure. It The filter 2 has a substantially conical shape as shown in FIG. 11, and is installed so that the apex of the conical shape is at the top.

Note that the filter may be installed so that the apex of the conical shape faces downward. This is shown in FIG. In FIG. 12, a conical filter 6 is provided in the solution descending pipe 4 in the direction opposite to that in the case of FIGS. 9 to 11.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional technology, when a large amount of foreign matter adheres to the filter, the filter is clogged, the solution circulation amount decreases, the performance as an absorption chiller / heater decreases, and in the worst case, absorption This causes a situation where the operation of the chiller / heater is stopped. Also, if the filter becomes clogged, it is necessary to clean or replace the filter, but for that purpose, the absorption chiller-heater must be disassembled, which is a very troublesome work.

An object of the present invention is to provide a solution foreign matter removing device in an absorption chiller-heater capable of preventing clogging of the filter and reducing maintenance work for the filter.

[0007]

[Means for solving problems]

 In order to achieve the above object, the present invention provides a solution foreign matter removing apparatus for removing foreign matter in a solution by providing a filter in the middle of a solution circulation flow path in an absorption chiller-heater, and temporarily storing the solution. Then, a circulation tank is caused to flow in the stored solution, and a storage tank for discharging the solution from the upper part is provided on the upstream side of the filter.

A magnet is provided on at least the bottom of the storage tank.

In addition, the present invention provides a solution foreign matter removing device, wherein a filter is provided in the middle of a solution circulation passage in an absorption chiller-heater, and the filter removes foreign matter in the solution, and the filter is cylindrical. The electromagnet is arranged so as to face the outer peripheral surface of the filter.

[0010]

[Action]

 According to the above configuration, the solution does not flow into the storage tank, so that a circulating flow of the solution is generated inside the storage tank, and the circulating flow causes the foreign matter in the solution to be subjected to centrifugal force. It descends and accumulates at the bottom of the storage tank for removal. In this case, if a magnet is provided at least at the bottom of the storage tank, the effect of removing the foreign matter can be enhanced when the foreign matter is a metal.

Further, by disposing the electromagnet so as to face the outer peripheral surface of the cylindrical filter, the metallic foreign matter attached to the filter can be separated and removed by the magnetic force of the electromagnet.

[0012]

【Example】

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

(First Embodiment) FIG. 1 shows a schematic structure of a solution foreign matter removing apparatus according to a first embodiment of the present invention, and FIG. 2 shows a portion A of FIG. In FIG. 1, a circular hole is formed in the solution outlet portion 10, and a solution descending pipe 12 having a filter 11 is arranged below the hole. The solution outlet portion 10 and the solution descending pipe 12 are connected by an intermediate member 13. That is, the intermediate member 13 has a substantially cylindrical shape, and an upper portion thereof is joined to the hole of the solution outlet portion 10, and a lower portion thereof is bent into an L-shaped cross section and joined to the solution descending pipe 12. Furthermore, the tip of the solution descending pipe 12 is disposed above the joint with the intermediate member 13, and the tip and the intermediate member 13 form a reservoir tank 14.

Further, a cap-shaped partition plate 15 is disposed above the tip of the solution descending pipe 12 and above the storage tank 14, and the peripheral edge of the partition plate 15 is bent outward to form a partition plate 15. The space between the peripheral portion and the intermediate member 13 (B portion in FIG. 2) is narrowed.

In the solution foreign matter removing device having the above structure, the solution flowing into the solution outlet 10 passes through a narrowed portion (B in FIG. 2) between the peripheral edge of the partition plate 15 and the intermediate member 13. Then it flows into the storage tank 14. At this time, since the narrowed portion is provided in the peripheral portion of the storage tank 14, the solution flowing into the storage tank 14 becomes a circulating flow in the storage tank 14, and the foreign matter in the solution receives centrifugal force, Further, by its own weight, it sinks to the bottom of the storage tank 14 to form a foreign matter reservoir 16. Then, the solution from which the foreign matter is removed overflows from the upper end of the storage tank 14 (the tip of the solution descending pipe 12) and flows toward the filter 2. As a result, relatively large foreign matter is completely removed from the solution flowing into the filter 2, and the filter 2 can be prevented from being clogged.

Since the foreign matter is mainly metal powder, in order to effectively remove this foreign matter, it is preferable to provide a magnet 17 at the bottom of the storage tank 14 as shown in FIG. Although the magnet 17 is provided inside the bottom of the storage tank 14 in the figure, providing the magnet 17 outside the bottom of the storage tank 14 has the same effect.

In addition to the bottom of the storage tank 14, the magnet may be provided at a position immediately before the solution overflows, that is, at the tip of the solution descending pipe 12 as shown in FIG. In this case, the foreign matter 16 is removed by the magnet 17 of the storage tank 14 and is also attracted by the magnet 18 at the front end portion of the solution descending tube 12, so that the effect of removing the foreign matter can be further enhanced. FIG. 5 is an enlarged view of the portion C in FIG. 4, showing a state in which the foreign matter reservoir 16 is formed by removing the solution by the magnet 18 immediately before the solution overflows.

As the amount of the foreign matter contained in the solution increases, the foreign matter removing apparatus having the configuration of FIGS. 2, 3, and 4 can be selected in this order to effectively remove the foreign matter. It Further, when the amount of foreign matter contained in the solution is large, the capacity of the storage tank 14 may be increased. As a result, the maintenance inspection cycle can be extended.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention.

In the figure, a circular hole is formed in the solution outlet portion 10, and a solution descending pipe 22 is arranged below the hole. The solution outlet section 20 and the solution descending tube 22 are connected by an intermediate member 23. That is, the intermediate member 23 has a substantially cylindrical shape, the upper portion thereof is joined to the hole of the solution outlet portion 20, and the lower portion thereof is bent to have an L-shaped cross section and joined to the solution descending pipe 22. The intermediate member 23 is made of a material having a high magnetic permeability (however, the coercive force is small). Further, a cylindrical filter 21 is provided above the solution descending pipe 22, and the filter 21 is made of a non-magnetic material. Further, an annular electromagnet 24 is provided on the outer circumference of the intermediate member 23, and an annular permanent magnet 25 is provided on the bottom thereof.

FIG. 7 shows the appearance of the filter 21. The filter 21 has a filter disk 21A fixed to the upper portion thereof. Further, as shown in FIG. 8, a DC power supply 27 is connected to the electromagnet 24 via a switch 26.

In the solution foreign matter removing apparatus having the above-described configuration, when the solution flows as shown by the arrow in FIG. 6 and the foreign matter in the solution is caught by the filter 21 and the filter 21 is clogged, The pump is stopped, the switch 26 of the electromagnet 24 is turned on, and the foreign matter adhering to the filter 21 is separated from the surface of the filter 21 by the electromagnetic force of the electromagnet 24 and sucked toward the inner surface of the intermediate member 23. Then, after a certain amount of time has passed, when the switch 26 is turned off, the foreign matter attracted to the inner surface side of the intermediate member 23 is the bottom of the intermediate member 23 due to its own weight because the intermediate member 23 has high magnetic permeability. Fall into the section. The foreign matter that has fallen to the bottom of the intermediate member 23 is attracted to the permanent magnet 25. In this way, the foreign matter attached to the filter 21 is removed, and the filter 21 can be prevented from being clogged.

The switch 26 of the electromagnet 24 may be turned on during pump operation without stopping the pump when removing the clogging of the filter 21.

[0024]

[Effect of the device]

 As described above, according to the present invention, the filter is less likely to be clogged, so maintenance and inspection work such as cleaning and replacement of the filter can be minimized.

Further, along with this, the frequency of disassembling work of the absorption chiller-heater is reduced, which is very convenient.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a solution foreign matter removing device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a portion A of FIG.

FIG. 3 is a diagram showing a modified example of FIG.

FIG. 4 is a diagram showing another modified example of FIG.

5 is an enlarged view of a C portion of FIG.

FIG. 6 is a schematic configuration diagram of a solution foreign matter removing device according to a second embodiment of the present invention.

FIG. 7 is a perspective view of the filter shown in FIG.

FIG. 8 is a drive circuit diagram of the electromagnet shown in FIG.

FIG. 9 is a view showing a conventional solution foreign matter removing device installed in an absorption chiller / heater.

FIG. 10 is a diagram showing an example of a conventional solution foreign matter removing device.

11 is a perspective view of the filter shown in FIG.

FIG. 12 is a view showing another example of a conventional solution foreign matter removing device.

[Explanation of symbols]

 10, 20 Solution outlet part 11, 21 Filter 12, 22 Solution downcomer 13, 23 Intermediate member 14 Reservoir 15 Partition plate 16 Foreign matter 17, 18 Magnet 24 Electromagnet 25 Permanent magnet 26 Switch 27 DC power supply

Claims (3)

[Scope of utility model registration request] 1. A solution foreign matter removing device, wherein a filter is provided in the middle of a solution circulation flow path in an absorption chiller / heater, and foreign matter in the solution is removed by the filter, the solution is temporarily stored, and a circulating flow is carried out to the stored solution. A solution foreign matter removing device in an absorption chiller-hot water machine, characterized in that a storage tank for causing the solution to be discharged and discharging the solution from the upper part is provided on the upstream side of the filter. 2. The solution foreign matter removing device according to claim 1, wherein the storage tank is provided with a magnet at least at a bottom portion thereof. 3. A solution foreign matter removing device for removing foreign matter in a solution by providing a filter in the middle of a solution circulation flow path in an absorption chiller-heater, and the filter has a cylindrical shape and an outer periphery of the filter. An apparatus for removing foreign matter of solution in an absorption chiller-heater, wherein an electromagnet is arranged so as to face the surface.