JPH0733096Y2 - Bleeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an extraction heat pump or the like for extracting air that is harmful to maintaining capacity and non-condensable gas generated by corrosion.

[Prior Art] As this type of bleeding device, those disclosed in, for example, JP-A-57-136076 and JP-B-59-67778 are known, and FIG. 6 is a schematic configuration diagram thereof. Is. In the figure, a gas-liquid separator 1 and an ejector 3 provided with a nozzle 2 are connected by a pipe 5 having a pump 4, and at the opening of the ejector 3, a mixing portion 6, a throat portion 7, and an enlarged portion are provided. A diffuser 9 consisting of 8 is connected. A pipe 10 connected to the enlarged portion 8 of the diffuser 9 is opened to the gas-liquid separator 1. Reference numeral 11 is a storage tank connected to the gas-liquid separator 1 via a pipe 12, and 13 is a condenser or absorber of an absorption heat pump connected to the ejector 3 via a pipe 14.

The operation of the extraction device configured as described above will be described by taking the case where 13 is a condenser as an example. When pump 4 is operated,
The solution thus delivered is ejected from the nozzle 2 of the ejector 3 toward the mixing section 6 of the diffuser 9, and the pressure of the mixing section 6 is lowered, so that the mixed gas of the refrigerant vapor and the non-condensable gas is discharged from the condenser 13. After being sucked into the mixing part 6, the throat part 7
Then, it flows to the gas-liquid separator 1 through the enlarged portion 8 and the pipe 10.
In the gas-liquid separator 1, the refrigerant vapor in the mixed gas is absorbed by the solution, and the non-condensed gas flows into the gas storage tank 11. After that, the solution in the gas-liquid separator 1 is circulated again by the pump 4, and the extraction operation is repeated. On the other hand, the non-condensable gas that has flowed and stored in the storage tank 11 is discharged to the outside of the machine by a vacuum pump (not shown).

[Problems to be solved by the device]

However, in such a conventional extraction device,
As described above, since the solution is ejected from the nozzle 2 to the mixing section 6 and the mixture of the refrigerant vapor and the non-condensable gas is sucked into the mixing section 6, the flow rate of the solution is increased or the pump 4 is used. There is a problem that not only the power consumption increases due to the increase of the discharge pressure of the, but also the COP of the absorption heat pump decreases.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an bleeding device capable of effectively bleeding a non-condensable gas with a small flow rate of a solution.

[Means for Solving the Problems]

In order to solve such a problem, the bleeding device according to the present invention is configured such that a solution inflow pipe inserted into a bleeding tank is tipped to an eccentric position with respect to the center of a bleeding tank connected to a heat exchanger by a bleeding pipe. Is inserted so as to face the nozzle, and the nozzle at the tip is opened in the extraction tank in a substantially horizontal direction.

[Action]

When the solution sent from the gas-liquid separator through the liquid delivery pipe is ejected from the ejection port of the solution inflow pipe into the extraction tank, a pressure difference is created between the heat exchanger and the extraction tank, so that the mixed gas in the heat exchanger is generated. Is sucked, and this mixed gas is sent to a gas-liquid separator and separated into a non-combustible gas and a solution. In this case, since the jet outlet of the solution inflow pipe is opened in the eccentric position in the bleeding tank in a substantially horizontal direction so as to be horizontal or obliquely downward from the horizontal, a vortex is generated in this bleeding tank. Stable extraction is performed by the action of the vortex.

〔Example〕

1 and 2 show an embodiment of the extraction device according to the present invention, FIG. 1 is a schematic configuration diagram thereof, and FIG. 2 is II I of FIG.
FIG. In the figure, members having the same construction as those of the conventional air extraction device shown in FIG. The gas-liquid separator 1 which is connected to the gas storage tank 11 by a pipe 12 is connected with a liquid-feeding pipe 5 having a pump 4 and an air-feeding pipe 10, and at the tip of the liquid-feeding pipe 5. Is connected to a solution inflow pipe 20. Reference numeral 21 is an extraction tank formed in a closed cylindrical shape, and is connected to a condenser 13 as a heat exchanger by an extraction pipe 14, and inside the extraction tank 21, the solution inflow pipe 20 is upward. Has been inserted from. Further, the solution inflow pipe 20 is bent into an L-shape at its tip and has an ejection port 20a. As shown in FIG. 2, this ejection port 20a is eccentric with respect to the center of the bleed tank 21 indicated by the symbol O. It is opened to face the position.

The operation of the extraction device configured as above will be described. When the pump 4 is operated, the solution in the gas-liquid separator 1 is sent to the solution inflow pipe 20 through the liquid sending pipe 5 and jetted from the jet outlet 20a into the extraction tank 21. In this case, the tip of the solution inflow pipe 20 is bent along the bottom surface of the extraction tank 21, and the ejection port 20a is opened so that the solution is ejected in the circumferential direction of the extraction tank 21. A vortex is generated in. At this time, since the saturated vapor pressure of the solution that has flowed into the extraction tank 21 is kept lower than the vapor pressure in the condenser 13, this pressure difference causes mixing of the refrigerant vapor and the noncondensable gas from the inside of the condenser 13. Gas flows into the extraction tank 21 through the extraction pipe 14.

Next, on the surface of the vortex in the extraction tank 21, a part of the refrigerant vapor is absorbed, and further the action of the vortex causes the non-condensable gas and the unabsorbed refrigerant vapor to accompany the solution from the air supply pipe 10. The unabsorbed refrigerant vapor flowing to the gas-liquid separator 1 is absorbed in the air supply pipe 10 and the gas-liquid separator 1.

The non-condensable gas is separated from the solution in the gas-liquid separator 1 and the piping
After being stored in the air storage tank 11 through 12, it is discharged to the outside by a vacuum pump (not shown). After that, the above operation is repeated to circulate.

In the above embodiment, the solution inflow pipe 20 is hung from the upper part of the extraction tank 21 at an eccentric position downward, and its tip is parallel to the bottom surface of the extraction tank 21 and is bent in a direction orthogonal to the radius of the extraction tank 21. Although shown, it is not limited thereto.

That is, FIG. 3 is a vertical sectional view of an extraction tank showing another embodiment of the present invention, and FIG. 4 is a sectional view taken along line IV-IV of FIG. It is inserted from the side of the tank 21 in the tangential direction, and the linear ejection port 30a is opened at an eccentric position with respect to the center of the extraction tank 21 as in the above-mentioned embodiment. Therefore, vortices are generated by jetting the solution, as in the above-described embodiment.

Further, FIG. 5 is a vertical cross-sectional view of an extraction tank showing another embodiment of the present invention. In this embodiment, like the previous embodiment, the solution inflow pipe inserted from the upper portion of the extraction tank 21 and hung down.
The tip of 40 is bent obliquely. The cross section is almost the same as that in FIG. 2, and since the ejection port 40a is opened at an eccentric position with respect to the center of the extraction tank 21, the generation of vortices is the same as in each of the above-described embodiments.

Incidentally, in each of the above embodiments, the condenser was illustrated as the heat exchanger, but it may be an absorber, and in this case as well, the mixed gas of the refrigerant vapor and the non-condensable gas is similarly extracted into the extraction tank 21 by the pressure difference. After sucking, the same operation is performed to extract air.

[Effect of device]

As apparent from the above description, according to the present invention, in the bleeding device, the solution inflow pipe inserted into the bleeding tank is tipped to the eccentric position with respect to the center of the bleeding tank connected to the heat exchanger by the bleeding pipe. Insert while facing the spout of
Since the jet outlet at this tip is opened in the extraction tank in a substantially horizontal direction, a vortex is generated in the extraction tank even at a small flow rate during extraction, and the action of this vortex absorbs the refrigerant vapor. Since it is possible to accompany with non-condensable gas and stable extraction capacity is obtained, COP of absorption heat pump
Can be increased, the power consumption of the solution pump can be reduced, and the operating cost can be reduced.

[Brief description of drawings]

1 to 5 show an embodiment of the extraction apparatus according to the present invention, FIG. 1 is a schematic configuration diagram thereof, and FIG. 2 is II I of FIG.
I sectional view, FIG. 3 and FIG. 4 show another embodiment of the present invention, FIG. 3 is a vertical sectional view of the extraction tank, and FIG. 4 is IV of FIG.
IV sectional view, FIG. 5 is a vertical sectional view of an extraction tank showing another embodiment of the present invention, and FIG. 6 is a schematic configuration diagram of a conventional extraction apparatus. 1 ... Gas-liquid separator, 5 ... Liquid supply pipe, 10 ... Air supply pipe,
13 …… Condenser, 14 …… Bleed pipe, 20,30,40 …… Solution inlet pipe, 20a, 30a, 40a …… Spout port, 21 …… Bleed tank.

Claims (1)

[Scope of utility model registration request] 1. A bleeding tank connected to a heat exchanger by a bleeding pipe, a solution inflow pipe inserted into the bleeding tank, and a mixed gas connecting the bleeding tank and a gas-liquid separator. In the bleeding device having a delivery pipe, the solution inflow pipe is inserted with the ejection port of the tip facing the eccentric position with respect to the center of the bleeding tank, and the ejection port of the tip is in the bleeding tank. An bleed device which is opened in a substantially horizontal direction.