JPH0833260B2 - Absorption cold water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an absorption chiller-heater for simultaneously extracting cold water and hot water.

(B) Conventional technology For example, in Japanese Patent Publication No. Sho 55-9620, a water heater is attached to the generator so that cold water and hot water can be taken out simultaneously from the evaporator and the water heater, and at the same time, a low temperature generator and an evaporator can be used. The refrigerant solution pipe (31) or (37) is connected to the concentrated solution pipe (28) connected to the reactor, and these refrigerant liquid pipes are provided with flow control valves (32) or (36), respectively, for heating. When the load is larger than the cooling load, the flow rate control valve (32) or (36) is controlled according to the temperature of the cold water outlet of the evaporator, and the refrigerant liquid is the refrigerant liquid pipe (31) or (37). Via concentrated solution piping (2
Disclosed is an absorption type cooling and heating device in which the concentration of the concentrated solution mixed in the concentrated solution of 8) and sprayed on the absorber changes, and the cooling function is controlled by adjusting the absorption function.

(C) Problem to be Solved by the Invention In the above-mentioned conventional technique, when the heating load is larger than the cooling load, the flow rate control valve (32) or (36) is controlled according to the chilled water outlet temperature, that is, the cooling load, When the refrigerant liquid is mixed with the concentrated solution in the concentrated solution pipe (28), the refrigerant liquid (for example, 4 to
Due to the temperature difference between the concentrated solution (for example, 40 to 50 ° C.) and the concentrated solution (for example, 40 to 50 ° C.), a flash may be generated in the mixing part, and a flash noise may be generated. In addition, even if the flash becomes a resistance against the mixture of the refrigerant liquid into the concentrated solution and the opening degree of the flow control valve (32) or (36) is adjusted, the concentration of the refrigerant liquid is reduced according to the decrease of the cooling load. There is a possibility that the amount of mixture in the solution does not increase, the cooling capacity cannot be significantly reduced, the cold water outlet temperature excessively drops, or the refrigerant liquid in the evaporator freezes.

It is an object of the present invention to prevent the cold water outlet temperature from excessively decreasing or the refrigerant liquid to freeze when the heating load (hot water load) is larger than the cooling load (cold water load), that is, during hot water main control.

(D) Means for Solving the Problems In order to solve the above problems, the present invention connects a high temperature generator (1), a condenser (3), an evaporator (4), and an absorber (5), respectively. The refrigeration cycle that takes out cold water from the evaporator (4) and the hot water heater (35) attached to the high temperature generation part (1) are configured to take out cold water and hot water at the same time. The amount of refrigerant flowing from the high temperature generator (1) to the condenser (3) is adjusted according to the temperature of the cold water outlet side of the evaporator (4), and the high temperature is adjusted according to the temperature of the hot water outlet side of the water heater (35). In an absorption chiller-heater for adjusting the heating amount of a generator (1), a condenser (3) and an absorber (5)
And a first refrigerant liquid return pipe (31) connected between the first refrigerant liquid return pipe (31) and the first opening / closing valve (33), and a refrigerant connected to the evaporator (4). A second refrigerant liquid return pipe (32) is connected between the liquid circulation pipe (19) and the absorber (5), and a second opening / closing valve (34) is provided in the second refrigerant liquid return pipe (32), Absorption cold / hot water provided with a control device (41) for sequentially opening / closing the first opening / closing valve (33) and the second opening / closing valve (34) according to the outlet side cold water temperature of the evaporator (4) during hot water main control Machine.

In addition, the first to guide the refrigerant liquid of the condenser (3) to the absorber (5)
A refrigerant liquid return pipe (31) is provided, and the first refrigerant liquid return pipe (3
A first on-off valve (33) that opens and closes according to the cold water outlet temperature of the evaporator (4) is provided in 1), and a second refrigerant liquid return for guiding the refrigerant liquid of the evaporator (4) to the absorber (5). An absorption chiller-heater having a pipe (32) and a second on-off valve (34) which opens and closes according to the cold water outlet temperature is provided in the refrigerant liquid return pipe (32).

Furthermore, a first refrigerant liquid return pipe (31) for guiding the refrigerant liquid of the condenser (3) to the absorber (5) is provided, and the first refrigerant liquid return pipe (31) is opened / closed according to the cold water outlet temperature. 1 open / close valve (3
3) is provided, and a second refrigerant liquid return pipe (32) for guiding the refrigerant liquid of the evaporator (4) to the absorber (5) is provided.
Absorption cold temperature provided with a second on-off valve (34) that opens and closes the refrigerant liquid return pipe (32) according to the cold water outlet temperature and sets the temperature at which it switches from closed to open lower than the temperature of the first on-off valve (33). It provides a water machine.

(E) Action During hot water main control, if the cold water load continues to drop significantly and the cold water outlet temperature drops even after the refrigerant has stopped flowing from the high temperature generator (31) to the condenser (3), The first on-off valve (33) opens, the refrigerant liquid in the condenser (3) flows into the absorber (5), and the absorption liquid is diluted. When the chilled water outlet temperature further decreases, the second opening / closing valve (34) opens, a large amount of refrigerant liquid in the evaporator (4) flows into the absorber (5), and the absorbed liquid is greatly diluted and evaporated. The amount of refrigerant sprayed in the vessel (4) is reduced, and it becomes possible to reliably avoid an excessive decrease in the cold water outlet temperature and an increase in the absorption liquid concentration. Further, the cooling capacity changes depending on the cold water outlet temperature, and the cold water outlet temperature can be stabilized.

Also, during hot water main control, if the cold water load continues to drop significantly and the cold water outlet temperature drops, the first on-off valve (3
3) and the second opening / closing valve (34) are opened, and the refrigerant liquid in the condenser (3) and the refrigerant liquid in the evaporator (4) pass through the first and second refrigerant liquid return pipes (31), (32). After that, it flows to the absorber (5), the concentration of the absorbing liquid is significantly reduced, and the cooling capacity of the evaporator (4) is also significantly reduced, so that the cold water outlet temperature is prevented from being excessively lowered and the freezing of the refrigerant liquid is surely avoided. It will be possible.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

What is shown in FIG. 1 is an absorption chiller-heater, which uses water (H ₂ O) as a refrigerant and an aqueous lithium bromide (LiBr) solution as an absorbent (absorption liquid).

In FIG. 1, (1) is a high temperature generator equipped with a gas burner (1B), (2) is a low temperature generator, (3) is a condenser,
(3A) is a refrigerant reservoir, (4) is an evaporator, (5) is an absorber, (6) is a low temperature heat exchanger, (7) is a high temperature heat exchanger,
(8) to (14) are absorption liquid pipes, (15) is an absorption liquid pump, (16) and (17) are refrigerant pipes, (18) is a refrigerant liquid lower pipe,
(19) is a refrigerant liquid circulation pipe, (19P) is a refrigerant liquid pump, (2)
(0) is a gas pipe connected to the burner (1B), (21) is a heating control valve, (22) is cold water pipe, and (23) is an evaporator heat exchanger, each of which is shown in FIG. Are connected by pipes. Further, (A) is an evaporative absorber cylinder, and (B) is a generating condenser cylinder. Further, (25) is a cooling water pipe, and in the middle of this cooling water pipe (25), an absorber heat exchanger (26),
And a condenser heat exchanger (27).

Further, (30) is a refrigerant drain control valve provided in the refrigerant pipe (17), (31) is a first refrigerant liquid return pipe, and one end of the first refrigerant liquid return pipe (31) has a refrigerant liquid flow-down pipe ( 18) and the other end is open to the gas phase in the absorber (5). And
A first opening / closing valve (33) such as a solenoid valve is provided in the middle of the first refrigerant liquid return pipe (31).

Further, (32) is a second refrigerant liquid return pipe,
One end of the refrigerant liquid return pipe (32) is connected to the refrigerant liquid circulation pipe (19) on the discharge side of the refrigerant liquid pump (19P), and the other end is open to the gas phase portion of the absorber (5). Further, (34) is a second opening / closing valve such as an electromagnetic valve provided in the middle of the second refrigerant liquid return pipe (32).

(35) is a water heater attached to the high temperature generator (1), (3
6) is a refrigerant drain pipe connected between the lower part of the water heater (35) and the high temperature generator (1), and this refrigerant drain pipe (3
A hot water drain control valve (37) is provided in the middle of 6). Also, (38) is a hot water pipe, and this hot water pipe (38)
A water heater heat exchanger (40) is provided on the way.

(41) is a control device for the absorption chiller-heater, (42) is a chilled water outlet temperature detector attached to the chilled water pipe (22) on the outlet side of the evaporator (4), and (43) is a water heater (35) Is a hot water outlet temperature detector attached to the hot water pipe (38) on the outlet side of each of the temperature detectors (42) and (43) is connected to the control device (41). Further, the refrigerant drain control valve (30), the refrigerant drain control valve (37), the heating amount control valve (21), the first and second opening / closing valves (33) and (34) are respectively connected to the control device (41). ing. Further, the control device (41) is provided with a cold main temperature main switching device (41A) for switching between cold water main control and hot water main control. Then, the switching device (41A) switches between the cold water main control and the hot water main control according to the cold water outlet temperature and the hot water outlet temperature as shown in FIG. Here, during the cold water main control, the control device (41) controls the heating amount control valve (21) according to the cold water outlet temperature.
The opening signal is output to the hot water drain control valve (37) according to the hot water outlet temperature. Further, during hot water main control, the control device (41) outputs an opening signal to the refrigerant drain control valve (30) according to the cold water outlet temperature,
An opening signal is output to the heating amount control valve (21) according to the hot water outlet temperature.

During operation of the absorption chiller-heater configured as described above, for example, the cold water outlet temperature is, for example, 7 ° C., and the hot water outlet temperature is, for example, 60 degrees.
When the temperature is ℃, the cold main temperature main switching device (41A) is switched to the cold water main control, and the control device (41) controls the cold water main control. Here, the cold water main control and the hot water main control are determined by the cold water outlet temperature and the hot water outlet temperature as shown in FIG. 2 as described above. Where the solid lines (L ₁ ), (L ₂ ),
(L ₃ ) Above is the cold water main control. When the operation of the chilled water main control is being performed, the control device (41) outputs a fully open signal to the refrigerant drain control valve (30), and the first and second on-off valves (33),
Output a close signal to (34). Further, the control device (41) outputs an opening signal to the heating amount control valve (21) according to the temperature detected by the cold water outlet temperature detector (42), and when the cooling water outlet temperature rises, the heating amount control valve (21 The opening of 21) becomes large and the opening of the heating amount control valve (21) becomes small when the cold water outlet temperature decreases. Also, the absorption liquid pump (15) and the refrigerant liquid pump (19P) are operated respectively, and the absorption liquid and the refrigerant circulate as in the conventional absorption chiller-heater, and the temperature drops in the evaporator heat exchanger (23). Cold water is supplied to the load.

Further, a part of the refrigerant vapor separated from the absorbing liquid in the high temperature generator (1) flows into the water heater (35) and exchanges heat with the hot water flowing in the water heater heat exchanger (40) to be condensed. And the water heater (3
The refrigerant liquid condensed in 5) returns to the high temperature generator (1) through the refrigerant drain pipe (36) and the hot water drain control valve (37).
Further, hot water whose temperature has risen in the water heater heat exchanger (40) is supplied to the load. Here, the control device (41) outputs an opening degree signal to the hot water drain control valve (37) according to the temperature detected by the hot water outlet temperature detector (43). Then, when the temperature of the hot water outlet rises, the opening degree of the hot water drain control valve (37) becomes smaller and the liquid level of the refrigerant in the water heater (35) rises. Therefore, the heat exchange area of the water heater heat exchanger (40) decreases, the heat exchange amount decreases, and the hot water outlet temperature decreases. Further, when the temperature of the hot water outlet decreases, the opening degree of the hot water drain control valve (37) increases, and the liquid level of the refrigerant in the water heater (35) decreases.
Therefore, the heat exchange area of the hot water heat exchanger (40) increases, the amount of heat exchange increases, and the hot water outlet temperature rises. When the chilled water main control is performed as described above, the opening degree of the heating amount control valve (21) changes according to the chilled water outlet temperature, and the generation amount of the refrigerant vapor of the high temperature generator (1) changes. The cold water outlet temperature is maintained at about the set temperature. Further, the opening degree of the hot water drain control valve (37) changes according to the hot water outlet temperature, the heat exchange amount of the water heater (35) changes, and the hot water outlet temperature is maintained at a substantially set temperature.

Also, the cold water load is reduced, and the cold water outlet temperature is
When the hot water outlet temperature is 60 ° C., for example, the cold main temperature main switching device (41A) is switched to the hot water main control, and the control device (41) controls the hot water main control. At this time, the control device (41) outputs a close signal to the first and second on-off valves (33) and (34) and also outputs a fully open signal to the hot water drain control valve (37). Then, the hot water drain control valve (3
7) fully open. Further, the control device (41) outputs an opening signal to the refrigerant drain control valve (30) according to the temperature detected by the cold water outlet temperature detector (42), and when the cold water outlet temperature rises, the refrigerant drain control valve The opening of (30) becomes large.
Then, the amount of the refrigerant flowing from the high temperature generator (1) to the condenser (3) via the refrigerant pipe (16), the low temperature generator (2), and the refrigerant pipe (17) increases, and the low temperature generator ( The amount of refrigerant vapor generated in 2) increases. Therefore, the amount of the refrigerant liquid flowing from the condenser (3) to the evaporator (4) increases, and the cold water outlet temperature decreases. Further, when the cold water outlet temperature decreases, the opening degree of the refrigerant drain control valve (30) decreases. Then, the amount of refrigerant flowing from the high temperature generator (1) to the condenser (3) decreases, and the amount of refrigerant vapor generated in the low temperature generator (2) decreases. Therefore, the amount of the refrigerant liquid flowing from the condenser (3) to the evaporator (4) is reduced, and the cold water outlet temperature rises. When the hot water main control is performed as described above, the opening degree of the heating amount control valve (21) changes according to the hot water outlet temperature, and the hot water outlet temperature is maintained at a substantially set temperature. Also, FIGS. 3 and 4
As shown in the figure, the opening degree of the refrigerant drain control valve (30) changes according to the cold water outlet temperature, and the cold water outlet temperature is maintained at substantially the set temperature.

The control of the refrigerant liquid pump (19P), the refrigerant drain control valve (30), and the first and second opening / closing valves (33) and (34) will be described below with reference to FIG. When hot water main control is performed as described above, for example, when the hot water load is large and the cold water load decreases, and the cold water outlet temperature decreases, the refrigerant drain control valve (30) is opened according to the cold water outlet temperature. The degree becomes smaller. When the chilled water outlet temperature reaches the first set temperature, for example 6.0 ° C., the control device (41) operates and the refrigerant drain control valve (3
Output a close signal to 0). Therefore, the refrigerant drain control valve (30) is closed, and the refrigerant does not flow to the condenser (3) through the refrigerant pipes (16) and (17). Further, the control device (41) outputs an open signal to the first opening / closing valve (33). Therefore, the first opening / closing valve (33) opens and the refrigerant liquid in the condenser (3) flows. Therefore, the refrigerant liquid separated from the absorbing liquid in the low temperature generator (2) and condensed in the condenser (3) flows from the condenser (3) into the refrigerant liquid downflow pipe (18) and the first refrigerant liquid return pipe (31). ) To the absorber (5). Then, the absorption liquid is diluted and the concentration of the absorption liquid does not rise.

As described above, the first opening / closing valve (33) opens and the condenser (3)
If the cold water load is further reduced or becomes zero when the refrigerant liquid of (1) is flowing to the absorber (8), the cold water outlet temperature further decreases. Then, when the chilled water outlet temperature reaches a second preset temperature lower than the first preset temperature, for example, 5.7 ° C., the control device (41) operates and outputs an open signal to the second opening / closing valve (34). Then, when the second opening / closing valve (34) is opened, the refrigerant liquid discharged from the refrigerant liquid pump (19P) passes through the refrigerant liquid circulation pipe (19) and the second refrigerant liquid return pipe (32) and then the absorber (5).
Flows to. Therefore, the absorption liquid is further diluted, the amount of the refrigerant sprayed in the evaporator (4) is reduced, the cooling capacity of the evaporator (4) is significantly reduced, and an excessive decrease in the cold water outlet temperature is avoided. .

After that, when the cold water load increases and the cold water outlet temperature rises to, for example, 6.0 ° C, the cold water outlet temperature detector (42)
The control device (41) which receives the signal from the above operates to output a closing signal to the second on-off valve (34). Then, all the refrigerant liquid discharged from the refrigerant liquid pump (19P) is sprayed by the evaporator (4), and the cooling capacity is improved. Further, when the chilled water load increases and the chilled water outlet temperature reaches, for example, 6.3 ° C., the control device (41) operates to output a close signal to the first opening / closing valve (33) and the refrigerant drain control valve. Output the opening signal to (30). Then, all the refrigerant liquid in the condenser (3) flows to the evaporator (4), and the refrigerant liquid generated in the high temperature generator (1) as the temperature of the chilled water outlet rises causes the refrigerant pipes (16) and (17). ) And the refrigerant drain control valve (30) to flow to the condenser (3), and the amount of the refrigerant liquid flowing from the condenser (3) to the evaporator (4) increases. Then, by adjusting the opening degree of the refrigerant drain control valve (30), the amount of refrigerant vapor generated in the low temperature generator (2) is changed, and the amount of refrigerant liquid flowing into the evaporator (4) is changed, so that cold water is cooled. The outlet temperature is maintained at about the set temperature. After that, the cold water load becomes, for example, zero, and even after the first and second opening / closing valves (33) and (34) are opened due to the decrease in the cold water outlet temperature, the cold water outlet temperature further decreases and reaches, for example, 5.0 ° C. In that case, the control device (41) operates to stop the refrigerant liquid pump (19P), and when the chilled water outlet temperature reaches 6.0 ° C., the refrigerant liquid pump (19P) starts operating.

According to the above-described embodiment, during the hot water main control, when the cold water load is significantly reduced or the cold water load is continuously zero and the cold water outlet temperature is lowered, the refrigerant drain control valve (30) is closed, and 1 open / close valve (33) opens, condenser (3)
A part of the refrigerant liquid flowing out of the first refrigerant liquid returns to the absorber (5) through the first refrigerant liquid return pipe (31). For this reason, the absorbing liquid in the absorber (5) is diluted, the cooling capacity is significantly lowered, and it is possible to avoid excessive lowering of the cold water outlet temperature. Further, when the cold water load decreases and the cold water outlet temperature decreases, the second opening / closing valve (34) opens and the refrigerant liquid pump (19P)
Part of the refrigerant liquid discharged from the refrigerant flows to the absorber (5) through the second refrigerant liquid return pipe (32), and the absorbed liquid is diluted and the spray amount of the refrigerant liquid is reduced. (4)
As a result, it is possible to reliably avoid an excessive decrease in the chilled water outlet temperature even if the chilled water load is drastically reduced. The driving can be stabilized.

In the above embodiment, the first refrigerant liquid return pipe (31) is provided between the refrigerant liquid circulation pipe (18) and the gas phase part of the absorber (5). (31) is provided between the lower part of the refrigerant liquid reservoir (3A) of the condenser (3) and the gas phase part of the absorber (5), and the first refrigerant liquid return pipe (31) is provided with a first portion.
Even when the on-off valve is provided, the same operational effect as that of the above-described embodiment can be obtained.

Further, when the refrigerant liquid pump (19P) is stopped, the first opening / closing valve (35) is open, so that the refrigerant liquid in the condenser (3) flows to the absorber (5) and avoids an increase in the concentration of the absorbing liquid. As a result, the freezing of the refrigerant liquid accumulated in the evaporator (4) can be avoided.

Furthermore, in the above embodiment, the first opening / closing valve (33) was opened as the cold water outlet temperature decreased, and when the cold water outlet temperature further decreased, the second opening / closing valve (34) was opened. When the outlet temperature of the chilled water drops sharply, the second on-off valve (34) is opened to send a large amount of refrigerant liquid to the absorber (5) to dilute the absorbed liquid significantly, and at the same time, the evaporator (4 ), The first spray valve (33) is opened and the refrigerant liquid in the condenser (3) is sent to the evaporator (4) and the absorption liquid is diluted when the cold water outlet temperature further decreases. By doing so, even when the cold water load is suddenly reduced, it is possible to avoid excessive lowering of the cold water outlet temperature and freezing of the refrigerant liquid. Also, by opening the first and second on-off valves (33) and (34) at the same time when the cold water load sharply decreases, the cold water outlet temperature is prevented from excessively decreasing and the refrigerant liquid is frozen in the same manner as above. be able to.

(G) Effect of the Invention The present invention is an absorption chiller-heater configured as described above, in which a first refrigerant liquid return pipe is connected between the condenser and the absorber, and the first refrigerant liquid return pipe is connected to the first refrigerant liquid return pipe. An opening / closing valve is provided, and a second refrigerant liquid return pipe is connected between the refrigerant liquid circulation pipe connected to the evaporator and the absorber, and an opening / closing valve is provided to the second refrigerant liquid return pipe to During hot water main control that controls the heating amount of the generator according to the hot water outlet side temperature, the control device operates to sequentially open and close each valve according to the evaporator outlet side cold water temperature. , When the cold water load is significantly reduced, the refrigerant liquid in the condenser and the refrigerant liquid in the evaporator sequentially flow to the absorber by opening the valves, and the absorbed liquid can be greatly diluted. To reduce the cooling capacity of the evaporator to avoid excessive lowering of the cold water outlet temperature and freezing of the refrigerant liquid. As a result, the operation of the absorption chiller-heater during hot water main control can be stabilized.

Further, opening / closing valves are respectively provided in the refrigerant liquid pipe for guiding the refrigerant liquid of the condenser to the absorber and the refrigerant liquid pipe for guiding the refrigerant liquid of the evaporator to the absorber, and these opening / closing valves are provided on the cold water outlet side of the evaporator. Since the opening / closing control is performed according to the temperature, when the cold water load is significantly reduced and the temperature at the cold water outlet side drops, the refrigerant liquid of the condenser and the evaporator is allowed to flow to the absorber, and the absorption liquid is greatly diluted. In addition, it is possible to reduce the amount of refrigerant sprayed in the evaporator, reduce the cooling capacity of the evaporator, prevent excessive lowering of the cold water outlet temperature, and stabilize the cold water outlet temperature. As a result, the operation of the absorption chiller-heater can be stabilized.

Further, a first opening / closing valve is provided in the refrigerant liquid pipe for guiding the refrigerant liquid in the condenser to the absorber, and a second opening / closing valve is provided in the refrigerant liquid pipe for guiding the refrigerant liquid in the evaporator to the absorber, and these opening / closing valves are evaporated. It operates according to the temperature of the cold water outlet side of the water cooler, and the temperature at which the second on-off valve switches from closed to open is lower than the temperature of the first on-off valve, so the cold water load is greatly reduced during hot water main control. Then, when the cold water outlet temperature decreases, the first opening / closing valve and the second opening / closing valve are sequentially opened, and the absorbing liquid can be diluted according to the decrease in the cold water outlet temperature by the refrigerant liquid of the condenser and the evaporator. The cooling capacity of the evaporator can be adjusted according to a significant decrease in the cold water load, the excessive decrease in the cold water outlet temperature and the freezing of the refrigerant liquid can be prevented, and the operation of the absorption cold / hot water machine can be stabilized. You can

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an absorption chiller-heater showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of switching between cold water main control and hot water main control, and FIG. 3 is a diagram showing cold water load and cold water temperature. FIG. 4 is a diagram for explaining the operation of the refrigerant liquid pump, the first and second opening / closing valves, and the refrigerant drain control valve according to the cold water outlet temperature. (1) …… High temperature generator, (3) …… Condenser, (4) ……
Evaporator, (5) ... Absorber, (17) ... Refrigerant tube, (18)
…… Refrigerant liquid flow down pipe, (19) …… Refrigerant liquid circulation pipe, (19P)
…… Refrigerant liquid pump, (30) …… Refrigerant drain control valve, (3
1), (32) …… First and second refrigerant liquid return pipes, (33), (3
4) …… First and second on-off valves, (35) …… Water heater.

Front page continuation (72) Inventor Takaki Iwatani, 2-18 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Toshiyuki Kaneko 2--18, Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP 62-155478 (JP, A) JP 3-156261 (JP, A)

Claims (3)

[Claims] 1. A generator, a condenser, an evaporator, and an absorber are connected to each other, and hot water is taken out from a water heater attached to a high temperature side of a refrigeration cycle for taking cold water from the evaporator. During control operation, while adjusting the heating amount of the generator according to the temperature of the cold water outlet side of the evaporator, and adjusting the drain amount of the refrigerant liquid from the water heater depending on the temperature of the hot water outlet side of the water heater, And, during the operation of the hot water main control, while adjusting the amount of refrigerant flowing from the generator to the condenser according to the temperature of the cold water outlet side, absorption cold hot water that adjusts the heating amount of the generator according to the hot water outlet temperature In a machine, a first refrigerant liquid return pipe is connected between a condenser and an absorber, a first opening / closing valve is provided in the first refrigerant liquid return pipe, and a refrigerant circulation pipe and an absorber connected to an evaporator The second refrigerant liquid return pipe is connected between the A second opening / closing valve is provided in the pipe, and a control device for sequentially opening / closing the first opening / closing valve and the second opening / closing valve in accordance with the outlet side cold water temperature of the evaporator during hot water main control is provided. Absorption chiller / heater. 2. A hot water main unit configured to connect a generator, a condenser, an evaporator, and an absorber to take hot water from a water heater attached to a high temperature side of a refrigeration cycle for taking cold water from the evaporator. At the time of control, the amount of refrigerant flowing from the generator to the condenser is adjusted according to the temperature of the cold water outlet side of the evaporator, and the absorption cold hot water that adjusts the heating amount of the generator according to the temperature of the hot water outlet side of the water heater In the machine, a refrigerant liquid pipe for guiding the refrigerant liquid of the condenser to the absorber is provided, a first opening / closing valve that opens and closes according to the temperature of the cold water outlet side is provided in the refrigerant liquid pipe, and the refrigerant liquid of the evaporator is Provide a refrigerant liquid pipe leading to the absorber,
An absorption chiller-hot water machine characterized in that a second opening / closing valve that opens and closes according to the temperature of the cold water outlet side is provided in the refrigerant liquid pipe. 3. A hot water main unit configured to connect a generator, a condenser, an evaporator and an absorber to take hot water from a water heater attached to a high temperature side of a refrigeration cycle for taking cold water from the evaporator. At the time of control, in an absorption chiller-heater that adjusts the amount of refrigerant flowing from the generator to the condenser according to the temperature on the cold water outlet side of the evaporator, and adjusts the heating amount of the generator according to the hot water outlet temperature of the water heater. A condenser liquid and a refrigerant liquid pipe for guiding the refrigerant liquid to the absorber are provided, and the refrigerant liquid pipe is provided with a first opening / closing valve that operates according to the temperature of the cold water outlet side, and
A refrigerant liquid pipe for guiding the refrigerant liquid of the evaporator to the absorber is provided, and the temperature of the refrigerant liquid pipe that operates according to the temperature of the cold water outlet side and switches from closed to open is lower than the temperature of the first on-off valve. An absorption chiller-heater having a set second opening / closing valve.