JP2001289530A - Absorption chiller-heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To return a driving heat source in a stable condition to cogeneration equipment. SOLUTION: The absorption chiller-heater comprises cooling water tubes 20A, 20B, and 20C, and valves V1, V2, and V3. A cooling water tube 20A is provided through an absorber 2 and a condenser 4 in this order. A cooling water tube 20B is branched from the tube 20A at this side of the absorber 2 and combined at the part coming from the condenser 4 to detour the absorber 2 and the condenser 4. A cooling water tube 20C is allowed to communicate between the part of the absorber 2 and the condenser 4 of the tube 20A. A three-way flow-regulating valve V1 is provided to a confluence of the tube 20A and the tube 20B to control the ratio of the cooling water flowing in the tube 20A and the tube 20B. An open/close valve V2 is placed upstream of the connection part of the tube 20A to the tube 20C, and this valve is closed at a time of heating operation, and opened at a time of cooling-operation. An open/close valve V3 is placed upstream of the connection of the tube 20B to the tube 20C, or to the tube 20C, and this valve is closed at the time of cooling operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption chiller / heater driven by using exhaust heat from another device as a heat source.

[0002]

2. Description of the Related Art As an apparatus of this type, for example, a temperature of 80 to 90.degree.
Of engine cooling water is supplied to the regenerator 3 through the heat source circulation pipe 21 as a driving heat source, and a cooling water pipe 20A provided via the absorber 2 and the condenser 4 when the amount of supplied heat is excessive. 7, the ratio of the cooling water flowing in the cooling water pipe 20B provided bypassing the absorber 2 and the condenser 4 is controlled by the three-way flow control valve V1 so that the excess is released. Are known.

[0003]

The absorption chiller / heater having the structure shown in FIG. 7 does not require the installation of a heat-dissipating heat exchanger which has been required for the heating operation by the absorption chiller / heater. However, there is a problem that the control stability of the surplus exhaust heat in the heating operation is inferior. That is, since the operation range of the control is narrower than the operation range of the structure of the flow control valve, the stability of the control when the excess heat is radiated is deteriorated.

[0004] The reason is that the maximum value of the exchanged heat amount is smaller than that in the cooling operation, and the temperature of the cooling water in winter in which heating is performed is significantly lower than in summer, and the temperature difference is large. This is because the synergistic effect further increases performance reserve.

That is, the maximum flow rate of the cooling water supplied to the absorber and the condenser during the heating operation is 1/5 to 1 of that in the cooling operation.
/ 10 is sufficient, and a slight malfunction of the adjustment of the flow control valve leads to a remarkable temperature fluctuation of the hot water supplied by heating in the evaporator, and the stability of the heating operation becomes insufficient. Was.

The heat source fluid supplied to the regenerator is
In the case of engine cooling water circulated and supplied from the cogeneration device, the state when returning from the absorption chiller / heater to the cogeneration device, that is, when the temperature fluctuates, the operating efficiency of the cogeneration device decreases, so It was also necessary to return the heat source fluid in a stable state.

[0007]

According to the present invention, as a specific means for solving the above-mentioned problems of the prior art, a regenerator for heating a absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid is supplied from outside to a regenerator. In an absorption chiller / heater that is required to always consume a predetermined amount of heat supplied as a heating source, a first cooling water pipe piped through an absorber and a condenser in this order, and the first cooling water pipe A second cooling water pipe which branches off before the absorber and joins at a part exiting the condenser, and bypasses the absorber and the condenser; a part of the first cooling water pipe between the absorber and the condenser, and a second cooling water pipe; A third cooling water pipe communicating with the cooling water pipe; and a first cooling water pipe and a second cooling water pipe provided at a junction of the first cooling water pipe and the second cooling water pipe.
A flow control valve for controlling the ratio of the cooling water flowing through the cooling water pipe; and a first control valve which is installed upstream of the third cooling water pipe connection portion of the first cooling water pipe and is closed during the heating operation and opened during the cooling operation. An on-off valve, and a second on-off valve installed upstream of the third cooling water pipe connection of the second cooling water pipe or on the third cooling water pipe, opened during heating operation, and closed during cooling operation. The absorption chiller / heater of the first configuration,

In an absorption chiller / heater which is required to always consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. , A first cooling water pipe piped in the order of an absorber and a condenser, and the first cooling water pipe branches off in front of the absorber and joins at a portion where the condenser has exited, and the absorber and the condenser are joined together. A second cooling water pipe bypassing the first cooling water pipe, a third cooling water pipe communicating the portion between the absorber and the condenser of the first cooling water pipe with the second cooling water pipe, and cooling provided in the third cooling water pipe and flowing therethrough. A flow control valve for controlling the amount of water, a first opening / closing valve installed upstream of the third cooling water pipe connection of the first cooling water pipe, closed during the heating operation, and opened during the cooling operation; 2 Installed upstream of the third cooling water pipe connection of the cooling water pipe, and opened during heating operation, An absorption chiller of the second configuration which is adapted and a second on-off valve that is closed during operation,

In an absorption chiller / heater which is required to always consume a predetermined amount of heat supplied from the outside as a heating source for the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. , A first cooling water pipe piped in the order of an absorber and a condenser, and the first cooling water pipe branches off in front of the absorber and joins at a portion where the condenser has exited, and the absorber and the condenser are joined together. A second cooling water pipe bypassing the first cooling water pipe, a third cooling water pipe communicating the portion between the absorber and the condenser of the first cooling water pipe with the second cooling water pipe, and cooling provided in the third cooling water pipe and flowing therethrough. A flow control valve for controlling the amount of water, a first on-off valve installed downstream of the third cooling water pipe connection of the first cooling water pipe to be closed during the heating operation and opened during the cooling operation, 2 The cooling water pipe is installed downstream of the third cooling water pipe connection, and is opened during the heating operation. A third configuration of the absorption chiller heater which is adapted and a second on-off valve that is closed during operation,

In an absorption chiller / heater which is required to always consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. , A first cooling water pipe piped in the order of an absorber and a condenser, and the first cooling water pipe branches off in front of the absorber and joins at a portion where the condenser has exited, and the absorber and the condenser are joined together. Cooling water pipe bypassing the first cooling water pipe, a third cooling water pipe communicating the portion of the first cooling water pipe between the absorber and the condenser, and the second cooling water pipe, and a merge of the second cooling water pipe and the third cooling water pipe A flow control valve for controlling the ratio of cooling water flowing to the upstream side of the second cooling water pipe and the third cooling water pipe;
A first opening / closing valve that is installed downstream of the cooling water pipe connection and is closed during the heating operation and is opened during the cooling operation, and a first opening / closing valve that is installed upstream of the third cooling water pipe connection of the second cooling water pipe during the heating operation. An absorption chiller / heater of a fourth configuration, comprising a second opening / closing valve that is opened and closed during the cooling operation;

In an absorption chiller / heater which is required to always consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. , A first cooling water pipe piped in the order of an absorber and a condenser, and the first cooling water pipe branches off in front of the absorber and joins at a portion where the condenser has exited, and the absorber and the condenser are joined together. A second cooling water pipe that bypasses the first cooling water pipe, a third cooling water pipe that communicates between the first cooling water pipe before the absorber and the second cooling water pipe, and controls the amount of cooling water that is provided in the third cooling water pipe and flows therethrough. A flow control valve, a first opening / closing valve installed upstream of the third cooling water pipe connection of the first cooling water pipe and closed during the heating operation and opened during the cooling operation, and a third opening / closing valve of the second cooling water pipe. Installed upstream from the cooling water pipe connection and opened during heating operation,
An absorption chiller / heater of a fifth configuration including a second on-off valve that is closed during the cooling operation;

In an absorption chiller / heater which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. , A first cooling water pipe piped in the order of an absorber and a condenser, and the first cooling water pipe branches off in front of the absorber and joins at a portion where the condenser has exited, and the absorber and the condenser are joined together. Cooling water pipe that bypasses the first cooling water pipe, a third cooling water pipe that communicates a portion of the first cooling water pipe that has exited the condenser with the second cooling water pipe, and an amount of cooling water that is provided in the third cooling water pipe and flows therethrough. Flow control valve, a first cooling water pipe which is installed downstream of the third cooling water pipe connection part of the first cooling water pipe, is closed during the heating operation, and is opened during the cooling operation, and a second cooling water pipe Is installed on the downstream side of the third cooling water pipe connection part, and is opened during the heating operation and during the cooling operation. A sixth absorption chiller configuration of which is adapted and a second on-off valve is closed, by providing, it solves the problems of the aforementioned prior art.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below in detail with reference to FIG. To facilitate understanding, the same reference numerals in FIG. 1 denote parts having the same functions as those described in FIG.

The absorption chiller / heater shown in FIG. 1 which can be used for cooling and heating uses water as a refrigerant and an aqueous solution of lithium bromide (LiBr) as an absorption liquid (solution), and includes an absorber 2 and a condenser. 4, a cooling water pipe 20A provided via
Cooling water pipe 20B provided to bypass absorber 2 and condenser 4
The cooling water pipe 20C communicates with the position shown in the figure, that is, the portion of the cooling water pipe 20A between the absorber 2 and the condenser 4 and the cooling water pipe 20B.

At the position shown in FIG. 1 of the cooling water pipe 20A, that is, on the upstream side of the connecting portion of the cooling water pipe 20C, an on-off valve V closed during heating operation and opened during cooling operation.
2 are installed. An opening / closing valve V3 that is opened during the heating operation and closed during the cooling operation is provided at the position shown in FIG. 1 of the cooling water pipe 20B, that is, upstream of the connection part of the cooling water pipe 20C.

Reference numeral 2A denotes a rare absorbing liquid reservoir formed below the absorber 2, and the rare absorbing liquid reservoir 2A and the generator 3
Is connected to the gas phase section by a diluted absorbent pipe 11 provided with an absorbent pump P1 on the way. The concentrated absorbent pool 3A formed in the lower part of the generator 3 and the concentrated absorbent dispersion device 2B provided in the gas phase of the absorber 2 are connected to the diluted absorbent flowing through the diluted absorbent pipe 11 on the way. The pipes are connected by a concentrated absorbent pipe 12 provided with a heat exchanger 5 for heat exchange.

The gas phase of the generator 3 and the condenser 4 and the gas phase of the evaporator 1 are communicably connected by a refrigerant vapor pipe 13 having an on-off valve V5. The bottom side of the condenser 4 and the gas phase of the evaporator 1 are connected to the refrigerant liquid pipe 14.
Connected by 14U is the refrigerant liquid pipe 14
This is a U-seal part provided in. The on-off valve V5 is opened during the heating operation and closed during the cooling operation.

Reference numeral 15 denotes a refrigerant liquid circulation pipe connecting the refrigerant liquid reservoir 1A of the evaporator 1 and the refrigerant liquid spraying device 1B provided in the gas phase portion of the evaporator 1;
, A refrigerant liquid pump P2 is provided.

Reference numeral 19 denotes a cold / hot water pipe which is piped through the inside of the evaporator 1, and cool / hot water cooled or heated when passing through the inside of the evaporator 1 is not shown by a cold / hot water pump P3. The load can be circulated.

Reference numeral 6 denotes a controller. The controller 6 is supplied from the absorber 2 to the generator 3 by the absorbent pump P1 during a heating operation in which hot water is circulated and supplied to the load side through the cold / hot water pipe 19. The diluted absorption liquid is heated by the engine cooling water supplied through the heat source circulation pipe 21, and the temperature of the cooled engine cooling water itself is returned to the temperature sensor T1.
By controlling the rotation speed of the absorbent pump P1 based on the temperature detected by the temperature sensor T1,
A function of adjusting the flow rate of the rare absorbing liquid supplied from the absorber 2 to the generator 3;

The temperature of the hot water supplied to the load via the cold / hot water pipe 19 is detected by a temperature sensor T2, and the three-way flow control valve V1 is adjusted based on the temperature detected by the temperature sensor T2, whereby cooling is performed. It has a function of changing the ratio between the amount of cooling water flowing through the water pipe 20A and the amount of cooling water flowing through the cooling water pipe 20B, and controlling the flow rate of cooling water supplied to the absorber 2 and the condenser 4.

Then, with the on-off valves V3 and V5 opened and the on-off valve V2 closed, the absorbing liquid pump P1 and the cold / hot water pump P3 are started, and the rare absorption sent from the absorber 2 to the generator 3 is started. The liquid is supplied to the heat source circulation pipe 2 in the generator 3.
1 is heated by the heat possessed by the engine cooling water supplied through
Is supplied to the evaporator 1, and the refrigerant vapor heats the water flowing in the cold / hot water pipe 19, and supplies the heated hot water to the load side through the cold / hot water pipe 19 to perform a heating operation. When you are

For example, when the heating load decreases, the cold / hot water pipe 1
9, the temperature of the warm water returning to the evaporator 1 and flowing back to the evaporator 1 decreases, and the amount of heat that the refrigerant supplied to the evaporator 1 is taken by the water flowing through the cold / hot water pipe 19 decreases. The pressure (and temperature) of the vessel 2, generator 3, and condenser 4 increases.

Therefore, the heat source circulation pipe 21 is connected to the generator 3
The amount of heat of the engine cooling water supplied to the engine is reduced by the solution in the concentrated absorption liquid reservoir 3A in the transmission generator 3, and the temperature of the engine cooling water returned to the engine (not shown) via the heat source circulation pipe 21 is reduced. The decrease width decreases, and generator 3
Can not expect a predetermined cooling effect on engine cooling water by

When the temperature of the engine cooling water as a heat source of the generator 3 rises above a predetermined temperature measured by the temperature sensor T1 due to a decrease in the heating load or the like during the heating operation, the controller 6 is controlled based on the temperature. Is a three-way flow control valve V1
And increasing the number of revolutions of the absorption liquid pump P1 to increase the amount of the diluted absorption liquid sent from the absorber 2 to the generator 3, thereby increasing the amount of heat that the engine cooling water radiates to the absorption liquid in the generator 3. By doing so, control is performed such that the temperature of the engine cooling water measured by the temperature sensor T1 falls within a predetermined temperature range.

When the amount of refrigerant vapor generated in the generator 3 increases by the above control, the cold / hot water pipe 19 in the evaporator 1
The heating effect on the water flowing in the inside increases,
The temperature of the hot water supplied to the load via the controller rises.
This time, the three-way flow control valve V1 is adjusted, and the cooling water pipe 20A is adjusted.
The amount of heat that the refrigerant radiates to the cooling water supplied into the condenser 4 is increased by increasing the flow rate of the cooling water flowing through the condenser 4, the amount of heat retained by the refrigerant flowing into the evaporator 1 is reduced, and the temperature of the hot water flowing through the cold / hot water pipe 19 is increased. Is controlled to fall within a predetermined temperature range.

Conversely, the temperature drop of the hot water flowing through the cold / hot water pipe 19 and returning to the evaporator 1 due to an increase in the heating load or the like is increased, and the refrigerant flows into the water flowing through the cold / hot water pipe 19 in the evaporator 1. When the amount of heat to be radiated increases and the engine cooling water measured by the temperature sensor T1 becomes lower than a predetermined temperature, the number of revolutions of the absorbent pump P1 is reduced and the cooling water is supplied to the condenser 4 by flowing through the cooling water pipe 20A. The amount of heat radiated to the cooling water is reduced by reducing the amount of the cooling water, and the temperature of the engine cooling water returned to the engine (not shown) via the heat source circulation pipe 21 is controlled within a predetermined range.
The hot water flowing through is controlled so as to fall within a predetermined temperature range.

The controller 6 includes on-off valves V2, V3, V
5 is set as in the heating operation, and only the absorbing liquid pump P1 is started. In a so-called heating no-load operation, a predetermined amount of cooling water flows to the condenser 4 via the cooling water pipe 20A. The three-way flow control valve V1 is adjusted as described above, and the rotational speed of the absorbent pump P1 is controlled based on the temperature of the engine coolant detected by the temperature sensor T1, so that the rare absorption supplied from the absorber 2 to the generator 3 is performed. It also has the function of adjusting the amount of liquid.

For this reason, even when the heating operation is not required, the heating no-load operation is performed, so that the temperature of the engine cooling water as a heat source coming out of the generator 3 after finishing the heating operation is reduced to a predetermined temperature. When it rises above, the amount of the rare absorbing liquid sent from the absorber 2 to the generator 3 is increased, and the amount of the engine cooling water radiated to the absorbing liquid in the generator 3 is increased. The flowing out engine cooling water can be controlled within a predetermined temperature range. Then, the heat taken from the engine cooling water by the evaporation of the refrigerant in the generator 3 is radiated to the cooling water supplied to the condenser 3 by a predetermined amount through the cooling water pipe 20A.

Further, when the driving state and the driving environment of the engine (not shown) change and the temperature of the engine cooling water supplied to the generator 3 via the heat source circulation pipe 21 changes, Depending on the temperature of the engine cooling water measured by the sensor T1, the amount of the rare absorbing liquid supplied from the absorber 2 to the generator 3 and the condenser 4 via the cooling water pipe 20A
Since the controller 6 controls the amount of cooling water flowing through the engine, the temperature of the engine cooling water can be controlled within a predetermined range and returned to the engine in this case as well.

In addition, since the excess amount of heat supplied from the heat source circulation pipe 21 to the generator 3 is radiated to the cooling water supplied only to the condenser 4 through the cooling water pipe 20A, the excess amount of heat is supplied to the absorber 2 The flow rate of the cooling water is much larger than that of the conventional absorption chiller / heater shown in FIG. 7 in which the cooling water is supplied to the condenser 4 to radiate the heat. Therefore, the effect of adjusting the opening of the three-way flow control valve V1 is relatively small. The heat source circulation pipe 21
The temperature fluctuation of the engine cooling water returned via the
The temperature fluctuation of the hot water supplied to the load via 9 can also be made much smaller than that of the conventional absorption chiller / heater shown in FIG. 7, thereby keeping the efficiency of the cogeneration apparatus high, and It can perform comfortable heating operation.

In the absorption chiller / heater of the above construction, the on-off valve V2 is opened and the on-off valves V3 and V5 are closed to start the absorbent pump P1, the refrigerant pump P2 and the chilled / hot water pump P3. The rare absorbing liquid sent from the absorber 2 to the generator 3 is passed through the heat source circulation pipe 2 in the generator 3.
The cooling medium is heated by the engine cooling water supplied through the cooling water pipe 1, and the generated refrigerant vapor is cooled and condensed by the cooling water flowing through the cooling water pipe 20 </ b> A in the condenser 4, and the condensed liquid refrigerant is passed through the refrigerant liquid pipe 14. The refrigerant liquid supplied to the evaporator 1 and stored in the refrigerant liquid reservoir 1A is sprayed from the refrigerant liquid spraying device 1B onto the cold / hot water pipe 19 by the refrigerant pump P2 and evaporated. It is also possible to cool the water flowing in the cold / hot water pipe 19 by the heat of vaporization and supply this cold water to the load side via the cold / hot water pipe 19 to perform the cooling operation.

It should be noted that, instead of the temperature of the heat source detected by the temperature sensor T1, the rotation speed of the absorbent pump P1 is controlled based on the temperature of the solution in the generator 3 to control the circulation amount of the absorbent. The controller 6 may be configured as follows.

[Second Embodiment] Hereinafter, a second embodiment of the present invention will be described in detail with reference to FIG. The difference between the absorption chiller / heater of the second embodiment shown in FIG. 2 and the absorption chiller / heater of the first embodiment shown in FIG. 1 is that of the absorption chiller / heater of the first embodiment. 3 which was installed with water machine
The two-way flow control valve V1 is removed, the two-way flow control valve V4 is installed in the cooling water pipe 20C, the on-off valve V2 is installed upstream of the cooling water pipe 20C connecting portion of the cooling water pipe 20A, and the on-off valve V3 is installed. Cooling water pipe 20C of cooling water pipe 20B
It is installed upstream of the connection.

Therefore, in the absorption chiller / heater of the second embodiment shown in FIG. 2, the cooling supplied to the condenser 4 via the cooling water pipe 20A by adjusting the opening of the two-way flow control valve V4. The flow rate of water is controlled.

The flow control valve for controlling the flow rate of the cooling water supplied to the condenser 4 is a two-way valve V4 unlike the flow control valve of the conventional absorption chiller / heater shown in FIG.
By adjusting the fixed resistance 7 represented by the orifice and the flow resistance of the two-way flow control valve V4, the maximum flow rate of the cooling water is made equal to (or less than) the cooling water flow, and the cooling water of the two-way flow control valve V4 is adjusted. By maximizing the operation range at the time of the maximum heat radiation to the condenser 4, the flow rate of the cooling water supplied to the condenser 4 can be controlled with high accuracy.

Therefore, also in the absorption chiller / heater of the second embodiment, the temperature of the engine cooling water returned to the side of the cogeneration system via the heat source circulation pipe 21 is stabilized, and The temperature of the hot water supplied to the load is also stabilized, so that the efficiency of the cogeneration device can be kept high and a comfortable heating operation can be performed.

Third Embodiment Hereinafter, a third embodiment of the present invention will be described in detail with reference to FIG. The difference between the absorption chiller / heater of the third embodiment shown in FIG. 3 and the absorption chiller / heater of the second embodiment shown in FIG. 2 is that the on-off valve V2 and the on-off valve V3 are different. There is a difference in the installation position.

That is, in the absorption chiller / heater of the third embodiment, the on-off valve V2 is installed downstream of the connecting portion of the cooling water pipe 20C of the cooling water pipe 20A, and the on-off valve V3 is installed on the cooling water pipe 20C of the cooling water pipe 20B. It is installed downstream from the connection.

Therefore, in the absorption chiller / heater of the third embodiment shown in FIG. 3, the flow rate of the cooling water supplied to the absorber 2 through the cooling water pipe 20A is controlled by the two-way flow control valve V4. It is controlled with high precision by adjusting the opening.

Also, in this absorption chiller / heater, the temperature sensor T1 is also used during the heating operation due to a decrease in the heating load or the like.
When the temperature of the engine coolant as a heat source of the generator 3 rises above a predetermined temperature, the controller 6 first increases the rotation speed of the absorbent pump P1 based on the temperature, and By increasing the amount of the rare absorbing liquid sent to the generator 3 and increasing the amount of heat that the engine cooling water radiates to the absorbing liquid in the generator 3, the temperature of the engine cooling water measured by the temperature sensor T1 becomes a predetermined temperature. It is controlled to be within the range.

When the amount of refrigerant vapor generated in the generator 3 is increased by the above control, the heating effect on the water flowing in the cold / hot water pipe 19 in the evaporator 1 is increased, and the temperature of the hot water supplied to the load via the cold / hot water pipe 19 is increased. Rises, the controller 6 adjusts the two-way flow control valve V4 based on the temperature of the hot water measured by the temperature sensor T2, and the cooling water pipe 20A
Increase the flow rate of the cooling water supplied to the absorber 2 through
The amount of heat that the refrigerant radiates to the cooling water supplied into the absorber 2 is increased, and thereby the degree of heating of the refrigerant in the evaporator 1 by the hot water flowing through the cold / hot water pipe 19 is reduced.
9 to control the hot water supplied to the load to fall within a predetermined temperature range.

Conversely, the temperature drop of the hot water flowing through the cold / hot water pipe 19 and returning to the evaporator 1 due to an increase in the heating load or the like is expanded, and the refrigerant flows into the water flowing through the cold / hot water pipe 19 in the evaporator 1. When the amount of heat to be radiated increases and the engine cooling water measured by the temperature sensor T1 becomes lower than a predetermined temperature, the number of revolutions of the absorbent pump P1 is reduced and the cooling water is supplied to the absorber 2 by flowing through the cooling water pipe 20A. The amount of heat radiated to the cooling water is reduced by reducing the amount of the cooling water, and the temperature of the engine cooling water returned to the engine (not shown) via the heat source circulation pipe 21 is controlled within a predetermined range.
The hot water supplied to the load via the control unit is also controlled to fall within a predetermined temperature range.

Therefore, also in the absorption chiller / heater of the third embodiment, the temperature of the engine cooling water returned to the cogeneration system through the heat source circulation pipe 21 is stabilized, and the load is reduced through the chill / hot water pipe 19. The temperature of the hot water supplied to the cogeneration apparatus is also stabilized, so that the efficiency of the cogeneration apparatus can be kept high and a comfortable heating operation can be performed.

[Fourth Embodiment] Hereinafter, a fourth embodiment of the present invention will be described in detail with reference to FIG. The absorption chiller / heater of the fourth embodiment shown in FIG. 4 is different from the absorption chiller / heater of the first embodiment shown in FIG. 1 in that a three-way flow control valve V1 and It is at the installation position of the on-off valves V2 and V3.

That is, in the absorption chiller / heater of the fourth embodiment, the three-way flow control valve V1 is connected to the cooling water pipe 20B.
The opening / closing valve V2 provided at the junction of the cooling water pipe 20C and the opening / closing operation as in the first embodiment is provided downstream of the cooling water pipe 20C connecting portion of the cooling water pipe 20A, and the opening / closing valve V3 is provided. The cooling water pipe 20B is installed upstream of the cooling water pipe 20C connection portion.

Therefore, in the absorption chiller / heater of the fourth embodiment shown in FIG. 4, during the heating operation, the opening degree of the three-way flow control valve V1 is controlled to the absorber 2 via the cooling water pipe 20A. The amount of cooling water supplied is controlled with high accuracy,

Therefore, also in the absorption chiller / heater of the third embodiment, the temperature of the engine cooling water returned to the cogeneration system through the heat source circulation pipe 21 is stabilized, and The temperature of the hot water supplied to the load is also stabilized, so that the efficiency of the cogeneration device can be kept high and a comfortable heating operation can be performed.

[Fifth Embodiment] Hereinafter, a fifth embodiment of the present invention will be described in detail with reference to FIG. In the absorption chiller / heater of the fifth embodiment, a cooling water pipe 20C is provided between a portion of the cooling water pipe 20A just before the absorber 2 and the cooling water pipe 20B, and the on-off valve V2 that opens and closes as described above. Is provided upstream of the cooling water pipe 20C connection part of the cooling water pipe 20A, the on-off valve V3 is provided upstream of the cooling water pipe 20C connection part of the cooling water pipe 20B, and the two-way flow control valve V4 is connected to the cooling water pipe 20C. is set up.

In the absorption chiller / heater of the fifth embodiment, the flow rate of the cooling water supplied to the absorber 2 and the condenser 4 through the cooling water pipe 20A by adjusting the opening of the two-way flow control valve V4. Is controlled.

By using the same two-way flow control valve V4 capable of controlling with high precision as that used in the third embodiment, the two-way flow control valve V4 is also used as the two-way flow control valve V4. The flow rate of the cooling water supplied to the condenser 4 can be controlled with much higher accuracy than the absorption chiller / heater of the prior art shown in FIG.

Therefore, also in the absorption chiller / heater of the fifth embodiment, the temperature of the engine cooling water returned to the cogeneration system through the heat source circulation pipe 21 is stabilized, and the temperature of the engine cooling water is reduced through the chill / hot water pipe 19. The temperature of the hot water supplied to the load is also stabilized, so that the efficiency of the cogeneration device can be kept high and a comfortable heating operation can be performed.

[Sixth Embodiment] Hereinafter, a sixth embodiment of the present invention will be described in detail with reference to FIG. In the absorption chiller / heater of the sixth embodiment, a cooling water pipe 20C is provided between a portion of the cooling water pipe 20A that has exited the condenser 4 and the cooling water pipe 20B, and the opening / closing valve that opens and closes as described above. V2 is provided downstream of the connection of the cooling water pipe 20C of the cooling water pipe 20A, the on-off valve V3 is provided downstream of the connection of the cooling water pipe 20C of the cooling water pipe 20B, and the two-way flow control valve V4 is provided with the cooling water pipe 20C. It is installed in.

Therefore, also in the absorption chiller / heater of the sixth embodiment shown in FIG. 6, the flow rate of the cooling water supplied to the absorber 2 and the generator 3 via the cooling water pipe 20A is 2
It is controlled with high accuracy by adjusting the opening of the flow control valve V4.

Therefore, also in the absorption chiller / heater of the sixth embodiment, the temperature of the engine cooling water returned to the cogeneration system through the heat source circulation pipe 21 is stabilized, and the temperature of the engine cooling water is reduced through the chill / hot water pipe 19. The temperature of the hot water supplied to the load is also stabilized, so that the efficiency of the cogeneration device can be kept high and a comfortable heating operation can be performed.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, in the absorption chiller / heater of the first configuration shown in FIG. 1, the on-off valve V2 is installed in front of the absorber of the cooling water pipe 20A, and the on-off valve V3 is installed on the cooling water pipe 20C. Is also possible.

Further, the concentrated absorption liquid pipe 12 of the absorption chiller / heater is used.
A absorption chiller / heater configured to install an absorbent pump in A and forcibly circulate the concentrated absorbent, and furthermore, a concentrated absorbent pipe 12A
Absorption liquid pump suction side and concentrated absorption liquid pipe 12B may be connected by side pipe 12C, and an absorption chiller / heater having a configuration provided to reduce cavitation of the absorption liquid pump may be used.

[0059]

As described above, according to the absorption chiller / heater of the present invention, almost the same amount of heat is removed from the thermal fluid supplied as a driving heat source from a cogeneration device or the like, that is, with little fluctuation. It is possible to return hot water at a stable temperature to the load from the evaporator, so if the supply of hot fluid is received from the cogeneration device, the efficiency of the cogeneration device side can be kept high. A comfortable heating operation can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment.

FIG. 2 is an explanatory diagram showing a second embodiment.

FIG. 3 is an explanatory diagram showing a third embodiment.

FIG. 4 is an explanatory diagram showing a fourth embodiment.

FIG. 5 is an explanatory diagram showing a fifth embodiment.

FIG. 6 is an explanatory diagram showing a sixth embodiment.

FIG. 7 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Evaporator 2 Absorber 3 Generator 4 Condenser 5 Heat exchanger 6 Controller 7 Fixed resistance 13 Refrigerant vapor pipe 19 Cold / hot water pipe 20A Cooling water pipe 20B Cooling water pipe 20C Cooling water pipe 21 Heat source circulation pipe P1 Absorbent liquid pump P2 Refrigerant liquid Pump P3 Cold / hot water pump T1 Temperature sensor T2 Temperature sensor V1 Three-way flow control valve V2 Open / close valve V3 Open / close valve V4 Two-way flow control valve V5 Open / close valve

Claims (6)

[Claims] An absorption cold and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe bypassing the vessel, a third cooling water pipe communicating the portion of the first cooling water pipe between the absorber and the condenser and the second cooling water pipe, a first cooling water pipe and a second cooling water pipe, And a flow control valve for controlling a ratio of cooling water flowing through the first cooling water pipe and the second cooling water pipe, and a heating operation installed upstream of the third cooling water pipe connecting portion of the first cooling water pipe. The first opening / closing valve, which is closed at the time of operation and opened during the cooling operation, is connected to the third cooling water pipe of the second cooling water pipe. A second opening / closing valve installed upstream of the unit or in a third cooling water pipe and opened during a heating operation and closed during a cooling operation. 2. Absorbent cold and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heat source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe that bypasses the vessel, a third cooling water pipe that communicates a portion of the first cooling water pipe between the absorber and the condenser and the second cooling water pipe, and a third cooling water pipe that is provided in the third cooling water pipe. A flow control valve for controlling the amount of cooling water flowing, a first on-off valve installed upstream of the third cooling water pipe connection of the first cooling water pipe, closed during heating operation, and opened during cooling operation; Is installed upstream of the third cooling water pipe connection portion of the second cooling water pipe, and is opened during the heating operation, and the cooling water is opened. An absorption chiller / heater, comprising: a second on-off valve that is closed during a chamber operation. 3. Absorbent cold and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe that bypasses the vessel, a third cooling water pipe that communicates a portion of the first cooling water pipe between the absorber and the condenser and the second cooling water pipe, and a third cooling water pipe that is provided in the third cooling water pipe. A flow control valve for controlling an amount of flowing cooling water, a first opening / closing valve which is installed downstream of the third cooling water pipe connection portion of the first cooling water pipe and is closed during the heating operation and opened during the cooling operation. Is installed downstream of the third cooling water pipe connection portion of the second cooling water pipe and is opened during the heating operation, An absorption chiller / heater, comprising: a second on-off valve that is closed during a chamber operation. 4. Absorbent cold and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe bypassing the vessel, a third cooling water pipe communicating a portion of the first cooling water pipe between the absorber and the condenser, and the second cooling water pipe, a second cooling water pipe and a third cooling water pipe, And a flow control valve for controlling a ratio of cooling water flowing to the upstream side of the second cooling water pipe and the third cooling water pipe, and a flow control valve provided downstream of the third cooling water pipe connection part of the first cooling water pipe. A first on-off valve that is closed during the heating operation and opened during the cooling operation, and a third cooling water in the second cooling water pipe A second on-off valve installed upstream of the pipe connecting portion and opened during heating operation and closed during cooling operation. 5. An absorption chilled and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe that bypasses the heat sink, a third cooling water pipe that communicates with the second cooling water pipe before the absorber of the first cooling water pipe, and an amount of cooling water provided in the third cooling water pipe and flowing therethrough. A flow control valve to be controlled, a first opening / closing valve installed upstream of the third cooling water pipe connection portion of the first cooling water pipe and closed during the heating operation, and opened during the cooling operation, and a second cooling water pipe. Installed upstream of the third cooling water pipe connection, opened during heating operation and closed during cooling operation An absorption chiller / heater comprising a second opening / closing valve. 6. Absorption cold and hot water which is required to consume a predetermined amount of heat supplied from the outside as a heating source of the absorbing liquid to a regenerator for heating the absorbing liquid to obtain a refrigerant vapor and a concentrated absorbing liquid. The first cooling water pipe, which is piped in the order of the absorber and the condenser, branches off in front of the first cooling water pipe and the absorber, and merges at the part where the condenser exits, and condenses with the absorber. A second cooling water pipe that bypasses the vessel, a third cooling water pipe that communicates a portion of the first cooling water pipe that has exited the condenser and the second cooling water pipe,
A flow control valve provided in the third cooling water pipe to control the amount of cooling water flowing therethrough; and a flow control valve installed downstream of the third cooling water pipe connecting portion of the first cooling water pipe and closed during the heating operation to perform the cooling operation. The first open / close valve that is opened at the time and the third
An absorption chiller / heater, comprising: a second opening / closing valve installed downstream of the cooling water pipe connection portion and opened during a heating operation and closed during a cooling operation.