JP2538278B2 - Absorption refrigerator - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of an absorption refrigerator.

(B) Conventional technology In the conventional absorption refrigerator of this type, a float valve is provided in the extraction chamber, and when the absorption liquid accumulates in the extraction chamber, the float that does not serve this rises and opens the valve to absorb the absorption liquid. It is well known that it is sent to the inside of the container (for example, see Japanese Utility Model Publication No. 53-17003).

(C) Problems to be solved by the invention However, in the conventional float valve of this type of absorption refrigerator, it is superior to other control valves in that it directly moves in conjunction with the liquid level. There was a problem that dirt and dust in the liquid adhered to the valve and the valve body of the float valve remained immobile and could not be completely closed. For this reason, when the float valve is closed, a gap of several mm is provided between the valve body and the valve seat so that the float valve can move even if dirt or dust adheres. Therefore, when a float valve is used to control the flow rate of the rare absorbent from the absorbent pump to the generator, the flow rate of the rare absorbent to the generator should be set to zero when it is desired to control it to zero. There were also problems that could not be restricted.

The present invention has been made in view of the above-mentioned problems of the conventional art, and an technical object thereof is to provide an absorption refrigerator that can control the flow rate of the rare absorption liquid from the absorption liquid pump to the generator.

(D) Means for solving the problem While the rare absorbent is guided from the absorber to the generator, the excess rare absorbent is refluxed to the absorber, and the flow rate of the rare absorbent to the generator is adjusted by the float valve. In the absorption chiller to be controlled, when limiting the flow rate of the absorbing liquid to the generator, even if the flow rate of the absorbing liquid cannot be limited to 100% with the float valve, the flow rate to the absorber is increased to increase the flow rate of the absorbing liquid to the generator. With a float valve that can limit the absorption liquid to the same extent as when it is engaged, the flow rate of the rare absorption liquid to the generator can be considerably reduced as compared with the engagement valve.

In order to solve the above-mentioned problems of the prior art by the above method, the present invention provides an intermediate liquid storage chamber communicating with a generator, a discharge side of the absorption liquid pump, and the generator with the intermediate liquid storage chamber. Arranged in the intermediate liquid reservoir chamber, a rare absorbent liquid pipe line that penetrates through the chamber, a rare absorbent liquid return passage that connects the discharge side of the absorbent liquid pump and the absorber through the intermediate liquid reservoir chamber, and And a float valve provided on one side of a fulcrum of the arm, and a first valve provided on the arm and rotating with the rotation of the arm. A first valve body and a second valve body, wherein the first valve body and the second valve body are provided at different angles with respect to an arm, and the first valve is provided. The body is placed in the middle of the dilute absorbent liquid line so that it is close to the dilute absorbent liquid flow path at the low position of the float. Be parallel, the second valve element is to provide a absorption refrigerating machine substantially parallel with the diluted absorption solution return passage at a location higher deployed in the float in the middle of the diluted absorption solution return passage.

(E) Action In the absorption refrigerator according to the present invention, when the intermediate liquid level in the intermediate liquid storage chamber is lowered, the float of the float valve is also lowered, and the first valve body is parallel to the rare absorbent liquid conduit, That is, the second valve body rotates in the opening direction, and the second valve body rotates in a direction in which the angle with the rare absorbent recirculation path increases from the state parallel to the rare absorbent recirculation path, that is, in the closing direction. Therefore, the rare absorbent flow rate in the rare absorbent conduit increases and the rare absorbent flow rate in the rare absorbent return path decreases.

Further, when the intermediate liquid level in the intermediate liquid storage chamber rises, the float of the float valve also rises, and the second valve body rotates in a direction parallel to the rare absorbent recirculation path, that is, in the opening direction, The valve body rotates in a direction in which the angle with the rare absorbent solution conduit increases from a state parallel to the rare absorbent solution conduit, that is, in the closing direction. For this reason, the flow rate of the rare absorption liquid in the rare absorption liquid conduit decreases, and the flow rate of the rare absorption liquid in the rare absorption liquid return path increases. When the float valve operates in this way, the rare absorbent flow rate from the absorbent pump is constant, and the rare absorbent flow rate in the rare absorbent return path increases, so the rare absorbent flow rate in the rare absorbent pipe line increases. Decreases. Since the rare absorbent flow rate to be controlled is reduced, the rare absorbent flow rate can be significantly limited as compared with the conventional float valve.

(F) Example An example of the absorption refrigerator according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a schematic configuration of an absorption refrigerator according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of a float valve. First, the configuration of FIG. 1 will be described.

(1) is a heat exchanger that exchanges heat between vapor and absorbing liquid,
(2) is a high temperature generator that heats and separates the refrigerant by using heat from the heat exchanger (1), (3) is a low temperature generator, (4) is a condenser, and (5) is the condenser ( An evaporator adapted to obtain cold water for cooling from the water cooler (6) by utilizing latent heat when the refrigerant from 4) is sprayed and vaporized, (7) an absorber, (8)
Is a refrigerant pump, and (9) is an absorbent pump.

(10) is an evaporator (5) for the refrigerant from the condenser (4)
(11) is a refrigerant circulation path having the refrigerant pump (8), (12) is a rare absorption liquid conduit having an absorption liquid pump (9), (13) and (14), respectively, high temperature heat exchange Bowl (15),
An intermediate liquid pipe having a low temperature heat exchanger (16), a pipe (17) for guiding the refrigerant vapor from the high temperature generator (2) to the condenser (4) via the low temperature generator (3), (18), (19) is a cold water pipe connected to the water cooler (6), (20), (21), (22)
Is a cooling water pipe line in which the coolers (23) and (24) are connected in series.

(25) is an intermediate liquid storage chamber that is provided in communication with the high temperature generator (2), (26) is a float valve, and (27) is a part of the rare absorption liquid from the absorption liquid pump (9). It is a rare absorbent circulation path for returning to the liquid, and connects the rare absorbent pipe (12) on the upstream side of the low temperature heat exchanger (16) and the absorber (7).

Next, the float valve (26) will be described in detail with reference to FIGS. 2 and 3. (28) is a float, which is formed of a columnar body having a smaller specific gravity than the weight (29), a large volume, and a solid content. Reference numeral (30) is an arm having a rotary shaft (31) as a fulcrum. One of the arms (30) is provided with the float (28) as a float element and the other is provided as a heavy wing element. The weight (29) is formed so that the float (28) side rises in the absorbing liquid. The rotary shaft (31) has a first valve body (3
4) and the second valve body (35) are attached and fixed at an angle to each other. The first valve body (34) is provided in the middle of the rare absorbent solution conduit (12), and the second valve body (35) is provided in the middle of the rare absorbent solution return passage (27). The first valve body (34) is provided with a rare absorbent liquid line (1) when the intermediate liquid level in the intermediate liquid reservoir (25) is low and the float (28) is in a low position.
It becomes almost parallel to 2) and rotates by the rise of the float (28) accompanying the rise of the intermediate liquid level to increase the angle with the rare absorption liquid pipe line (12). In addition, the second valve body (35) is the intermediate liquid reservoir (2
When the intermediate liquid level in 5) is high and the float (28) is in a high position, it becomes almost parallel to the dilute absorption liquid recirculation path (27), and the float (28) descends as the intermediate liquid level descends to rotate. And increase the angle with the rare absorbent recirculation path (27).

That is, the first valve body (34) rotates in the closing direction (opening direction) when the intermediate liquid level in the intermediate liquid storage chamber (25) rises (descents),
The second valve body (35) rotates in the opening direction (closing direction) when the intermediate liquid level in the intermediate liquid storage chamber (25) rises [descents].

The configuration of the present invention is as described above, and the operation will be described below.

During operation of the absorption refrigerator of the present invention, when the intermediate liquid is accumulated in the intermediate liquid reservoir chamber (25) and the intermediate liquid level rises, the float (28) rises. When the float (28) rises, the arm (30) rotates, the rotary shaft (31) fixed to the arm also rotates, and the first valve fixed to the rotary shaft (31) further rotates. The body (34) and the second valve body (35) also rotate. At this time, the first valve body (34) rotates in the closing direction and the second valve body (35) rotates in the opening direction. The rare absorbent flow rate from the absorbent pump (9) is constant, and the rare absorbent return path (27)
Since the flow rate of the rare absorbent of is increased, the flow rate of the rare absorbent of the rare absorbent pipe line (12) is decreased. Then, the first valve body (34) controls the flow rate of the rare absorption liquid in the rare absorption liquid pipe line (12).
As described above, the flow rate of the rare absorbing solution to be limited is reduced, so that the flow rate of the rare absorbing solution to the high temperature regenerator (2) can be limited more than the conventional device.

The float (28) descends when the amount of the intermediate liquid decreases below the rotating shaft (31) in the intermediate liquid reservoir (25) and the intermediate liquid level descends. When the float (28) descends, the arm (30), the rotating shaft (31), and the first and second valve bodies (34), (3
5) also rotates. At this time, the first valve body (34) rotates in the opening direction and the second valve body (35) rotates in the closing direction. The flow rate of the rare absorbent from the absorbent pump (9) is constant, and the flow rate of the rare absorbent in the rare absorbent return path (27) decreases, so the flow rate of the rare absorbent in the rare absorbent conduit (12) is small. Will increase.

In addition, a high temperature heat exchanger (1
5) Pipe (32) branched from the rare absorbent line (12) after passing
Alternatively, the pipe (33) branched from the rare absorption liquid pipe line (12) after passing through the low temperature heat exchanger (16) may be used, but since these rare absorption liquids are all high temperature, the low and low pressure absorbers are used. It is not appropriate to recirculate into (7), and it is suitable to branch from the upstream side of the low temperature heat exchanger (16) shown by the solid line.

(G) Effect of the Invention In the float valve of the absorption refrigerator according to the present invention,
When the intermediate liquid level in the intermediate liquid chamber rises, the arm rotates as the float rises, and the first valve body and the second valve body are attached to the arm at different angles. And rotate, the second valve element provided in the rare absorbent recirculation path moves in the opening direction, and the first valve element provided in the rare absorbent solution conduit moves in the closing direction. Since the flow rate of the rare absorbent to the high temperature generator is small and the first valve body for controlling the flow rate of the rare absorbent moves in the closing direction, the flow rate of the rare absorbent to the high temperature generator can be made smaller than that of the conventional device. Can be significantly limited.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view of an absorption refrigerator according to an embodiment of the present invention, FIG. 2 is a perspective view of a float valve, and FIG. 3 is a side view of the float valve. (2) ... High temperature generator, (9) ... Absorbent pump, (12) ...
Rare absorbent liquid conduit, (25) ... Intermediate liquid reservoir chamber, (26) ... Float valve, (27) ... Rare absorbent liquid return passage, (28) ... Float, (2
9)… weight, (30) arm, (31)… rotating shaft, (34)
... first valve body, (35) ... second valve body.

Claims (1)

(57) [Claims] 1. An absorption refrigerator having a refrigeration cycle in which a generator, a condenser, an absorber, an evaporator, an absorption liquid pump, etc. are connected by piping, and an intermediate liquid storage chamber communicating with the generator, A rare absorbent line connecting the discharge side of the absorbent pump and the generator penetrating the intermediate liquid chamber, and the discharge side of the absorbent pump and the absorber penetrating the intermediate liquid chamber. And a rare absorption liquid recirculation path connected to each other, and a float valve provided in the intermediate liquid storage chamber, the float valve having an arm,
A float provided on one side of the fulcrum of this arm,
A first valve body and a second valve body that are provided on the arm and that rotate with the rotation of the arm; and the first valve body and the second valve body with respect to the arm. Are provided at different angles in different directions, and the first valve element is disposed in the middle of the rare absorbent liquid conduit so that it is substantially parallel to the rare absorbent liquid flow path at a low position of the float. The absorption chiller is characterized in that the second valve element is arranged in the middle of the rare absorbent recirculation path and is substantially parallel to the rare absorbent recirculation path at a high position of the float.