JPS61240064A - Absorption refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to improvements in absorption refrigerators (absorption heat pumps), and particularly relates to improvements in the crystallization of absorption liquid when the temperature of the cooling fluid supplied to the absorber changes. This invention relates to an absorption refrigerating machine equipped with a control device that performs prevention and absorber capacity adjustment (hereinafter referred to as this type of absorption refrigerating machine).

(b) Conventional Technology As a conventional technology for this type of absorption refrigerator, for example, as seen in Publication of Utility Model Publication No. 13646/1982, a refrigerant pipe is connected to a refrigerant conduit connecting a refrigerant tray of a condenser and an evaporator. By connecting side pipes with automatic valves and controlling the automatic valves with the signal from the temperature sensor of the cooling water pipe, that is, the signal from the cooling water inlet temperature detector, the concentration of the absorbent can be adjusted and the concentration of the absorber can be adjusted. There are known devices that adjust the capacity and prevent crystallization of the absorption liquid.

Problems to be Solved by the Invention In the conventional absorption refrigerator of this type as described above, although it is possible to prevent crystallization of the absorption liquid in response to an excessive drop in the cooling water temperature, the concentration of the absorption liquid may be changed. Due to the limited range, there was a limit to the capacity adjustment of the absorber, which caused problems such as over-chilling and freezing of the cold water.

In view of these problems, it is an object of the present invention to provide an absorption refrigerator of this type that can adjust the capacity to match the load in response to a wide range of changes in cooling water temperature and can also prevent crystallization of the absorption liquid. It is something.

B) Means for solving the problem The present invention, as a means for solving the problem, connects a concentrated liquid reservoir having nine absorbers and a sprayer through a pipe line equipped with a pump for concentrated liquid to flow the concentrated liquid. A channel is formed in the middle of the absorption liquid flow path from the generator to the absorber, and a flow path for blowing the refrigerant liquid is formed by connecting the discharge side of the refrigerant liquid pump and the concentrated liquid reservoir with a pipe line equipped with a flow rate control valve. This type of absorption refrigerator is equipped with a device that adjusts the discharge amount of the concentrated liquid pump and the opening degree of the flow rate control valve based on the signal from the cooling water inlet temperature detector. .

(E) Function The present invention has the following functions: discharge of a pump for concentrated liquid;
By adjusting the output amount and the opening degree of the flow rate control valve from 0% to 100%, the concentration of the absorption liquid sprayed into the cooler of the absorber can be changed, and at the same time, the amount can also be changed from 0% to 100%. , the absorber capacity of this type of absorption refrigerator can be adjusted over a wide range.

Therefore, in this type of absorption refrigerator according to the present invention, even if the temperature of the cooling water flowing into the absorber cooler changes over a wide range, the amount of refrigerant absorbed in the absorber and the amount of refrigerant in the evaporator will be reduced. The amount of evaporation can be adjusted to just the right amount depending on the load, preventing excessive cooling or insufficient cooling due to changes in cooling water temperature, and preventing freezing or absorption of cold water due to excessive drops in cooling water temperature. Crystallization of the liquid can also be prevented.

(H) Embodiment The drawing is a schematic configuration explanatory diagram showing an embodiment of this type of absorption refrigerator according to the present invention, (HG) is a high temperature generator, 1
1) is a generation condenser consisting of a low temperature generator (LG) and a condenser (Ca), (2; is an evaporative absorber consisting of an evaporator [F] and an absorption factor, (LH@,') is a low temperature solution heat The exchanger, (HH/X) is a high temperature solution heat exchanger, (3) is a liquid reservoir (hereinafter referred to as tank liquid reservoir 5') for the dilute absorption liquid (hereinafter referred to as dilute liquid), +47 is A liquid reservoir (hereinafter referred to as a concentrated liquid reservoir) for a concentrated absorption liquid (hereinafter referred to as a concentrated liquid) for good absorption, (5) a liquid reservoir for a low temperature generator (LG), (6)
, (7) are the refrigerant liquid reservoirs of the condenser (CD) and evaporator (■), (8) is the absorption liquid dispersion device, (9) is the refrigerant liquid dispersion device, (Pl) is the refrigerant liquid pump, ( P) is a pump for tank liquid, and (P,,) is a pump for concentrated liquid.These are the pipes through which the refrigerant flows (IG, The pipe α leaks, the pipe 1G+ through which the α blocking solution is sent, (lη, (11, (Is, the pipe Qυ, CI) through which the absorption liquid of intermediate concentration flows, the pipe through which the concentrated liquid flows, (c)
and are connected by a pipe C (c) through which the concentrated liquid is sent, thereby forming a circulation path for the refrigerant [water] and the absorption liquid [lyticum bromide aqueous solution]. In addition, (H,) is a water heater, and this water heater and high temperature generator (HG) are a pipe (1 (1,
(to) and are connected by a pipe (a) through which the refrigerant drain flows, forming a refrigerant circulation path.

(to) is a refrigerant liquid blowing pipe connecting pipe α9 on the discharge side of the refrigerant liquid pump (P,) and the concentrated liquid reservoir (4), and this pipe is equipped with a flow rate control valve (■,). It is preparation.

The handle is the combustion heating chamber of the high temperature generator (HG), (to), (to)
... is a pipe through which combustion gas flows, 01) is a low temperature generator (L
G) heater, Oa, (G) are respectively condensers (C, s
) is a cooler for absorption good causes, and (b) is a water cooler for the evaporator [F].

In addition, (to) is the hot water heat exchanger of the water heater (H,), and (to) and (9) are the low temperature and high temperature solution heat exchangers (
LH6K), ()ILx) heat exchanger tubes.

(To) A pipe through which cold water flows connected to the r3ats water cooler (Foundation), and the pipe C31 is equipped with a temperature detector (Stl). Book, 0υ, (company) is a tube through which cooling water flows, connecting a cooler (to) C33 in series, and a temperature detector (
Stt) is the preparation.

Also, @3 is a pipe that leads fuel to the combustion heating chamber @, and this pipe is equipped with a fuel control valve (■,). Furthermore, (44),
(c) is a pipe through which hot water flows, connected to a hot water heat exchanger (to).

(TJ is a temperature regulator, and a temperature sensor (Stυ) is connected to the fuel control valve (V,) via this temperature regulator.
The opening degree is adjusted.

In addition, (Tax) is also a temperature regulator, and the flow rate control valve (V
, ) is a trap so that the opening degree of the opening can be adjusted. And also,
(RC) is a temperature detector (
This is a controller that adjusts the discharge amount of the concentrated liquid pump (P□) in response to a signal from the pump (Sty), and this controller has a built-in inverter that changes the rotation speed of the pump drive motor, for example.

Next, an example of the operation of the absorption refrigerating machine (hereinafter referred to as the present machine) configured as described above will be explained.

When operating this machine during the intermediate seasons such as spring and autumn, or during the winter season,
Cooler C331Ki cooling water temperature is often 20
below ℃. If this condition continues for a long time, for example, the capacity of the absorber becomes excessive for the cooling load, causing excessive cooling.If this condition is left as it is, it may cause the chilled water to freeze, or the concentration sprayed on the cooling Masuda may become too cold. Problems such as excessive cooling of the liquid and crystallization occur. In this case, in this machine, the flow rate control valve (V8) is fully opened by the signal from the temperature detector (Sty), and the refrigerant liquid is blown into the concentrated liquid filler (4) while the concentrated liquid is diluted. Part 4
Crystallization is prevented. In addition, the discharge amount of the concentrated liquid pump (P, ,) is reduced to zero or close to zero, and the amount of concentrated liquid sprayed to the condenser (to) for good absorption is also reduced to zero or close to zero, resulting in evaporation. Since the absorption and evaporation of refrigerant in the absorber (21) is significantly suppressed, excessive cooling and freezing of the cold water are also prevented.

And vice versa? 9 When the coolant water temperature starts to rise above 20℃, the concentrated liquid pump (P
1) is increased and the flow rate control valve (V,
) is adjusted to decrease, and when the cooling water temperature becomes close to the rated value (for example, 30° C.), the opening is adjusted to 0% and the discharge amount is adjusted to the rated value of 4tg.

As a result, the absorption and evaporation of refrigerant in the evapotranspiration collector (2) is adjusted according to the load, and the refrigerating capacity of the machine is adjusted to the temperature of the cooling water. Due to the change in
You can get cold water that matches the load.

In addition, in this machine, as in the conventional absorption refrigerator of this type, the opening degree of the fuel control valve (V) is of course adjusted according to the load based on the signal from the temperature detector (Stυ).

Furthermore, it goes without saying that the present invention can be applied not only to double-effect absorption refrigerators but also to single-effect absorption refrigerators, and can also be applied to absorption heat pumps. In the case of an absorption heat pump, waste hot water or other low-temperature fluid is supplied to the water cooler (B) instead of cold water, and hot water or other fluid to be heated is supplied to the cooler (C), 02.

(g) Effects of the Invention As described above, according to the present invention, the capacity of the absorber can be adjusted to approximately match the load in response to a wide range of temperature changes in the cooling water (or hot water) supplied to the absorber. Since this is possible, it is possible to obtain cold water (or hot water) that corresponds to the load by minimizing the excess or deficiency of the refrigeration capacity (or heat pump capacity), and also to freeze the cold water (or waste hot water, etc.) and crystallize the absorption liquid. This type of absorption refrigerator has the effect of preventing

[Brief explanation of drawings]

The drawing is a schematic structural diagram showing an embodiment of this type of absorption refrigerator according to the present invention. [11... Generation condenser, (2)... Evaporative absorber,
(HG)...High temperature generator, (LG)...Low temperature generator, (Ca)...Condenser, ■...Evaporator, Prisoner...Absorber, (LH・X), ( HH・X)・
...Low temperature, high temperature solution heat exchanger, (3)...tank liquid reservoir,
(4)... Concentrated liquid reservoir, (7)... Refrigerant liquid reservoir,
(8), (9)-fi cloth, Q3, Q4), Q51
...Pipe, (P,) ...Refrigerant liquid pump, αe
, αη, 餞, αI, C'l, H1@, (Ha), (Goods),
(c)...Pipe, (PL□)...tank liquid pump, (
P3. )...Concentrated liquid pump, (To)...Pipe line,
(■,)...Flow rate control valve, 04, (c)...Cooler, Package 1...Water cooler, (41, aυ, (421・
...Tube, (St2) ...Temperature detector, (Te
t)...Temperature regulator, (RC)...Controller.

Claims (1)

[Claims] (1) The concentrated absorption liquid reservoir provided in the absorber and the absorption liquid dispersion device are connected by a pipe line equipped with a concentrated absorption liquid pump, and the flow path of the concentrated absorption liquid is connected from the generator to the solution heat exchanger. It is formed in the middle of the absorption liquid flow path leading to the cooler of the absorber, and the flow rate is controlled between the liquid reservoir and the discharge side of the refrigerant liquid pump for recirculating unevaporated refrigerant to the evaporator. A flow path for blowing the refrigerant liquid is formed by connecting pipes with valves, and the discharge amount of the pump for concentrated absorption liquid and the opening of the flow rate control valve are controlled by the signal from the temperature sensor of the fluid flowing into the cooler of the absorber. An absorption refrigerator characterized in that it is equipped with a control device that adjusts the temperature.