JPH0547762U - Absorption chiller / heater - Google Patents

Abstract

(57) [Abstract] [Purpose] In an absorption chiller-heater, it is possible to simultaneously supply cold water and hot water, and to suppress the increase in the number of devices and to make them smaller. [Structure] In a condenser 304, a plurality of tubes 310 whose axes are substantially vertical are arranged so that their outer peripheral surfaces are in contact with refrigerant vapor and their inner peripheral surfaces are in contact with the outside air, and the inner peripheral surfaces of the tubes 310 are cooled. A means for forming a liquid film of water is provided and the condenser 304
A spiral hot water coil 1E connected to the hot water pump 6A is arranged so as to surround the pipe 310 inside. Also,
Inside the absorber 306, a plurality of pipes 31 whose axes are substantially vertical
5 is arranged such that its outer peripheral surface is in contact with the refrigerant vapor and its inner peripheral surface is in contact with the outside air, and means for forming a liquid film of cooling water is provided on the inner peripheral surface of the pipe 315. A cooling fan 312 that allows air to flow is provided. 【effect】

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, an absorbing liquid prepared by dissolving an absorbent (eg, lithium bromide or lithium iodide) in a liquid refrigerant (eg, water) is used as a working fluid, and the concentration of the working fluid is changed from a dilute solution to a concentrated solution (as the case may be). Relates to an absorption chiller-heater that operates while concentrating a dilute solution, an intermediate concentrated solution, and a concentrated solution in this order, and particularly to an absorption chiller-heater that simultaneously supplies cold water and hot water.

[0002]

[Prior Art]

 Conventionally, as an absorption chiller-heater for simultaneously supplying cold water and hot water, for example, one described in "Absorption chiller" (written by Shuichi Takada, published by The Japan Refrigeration Association) is known. As shown in FIG. 10, this is due to the third heat exchange that heats warm water with the sensible heat of the intermediate concentrated solution generated in the first generator, and the latent heat and sensible heat of the refrigerant that has passed through the second generator. A hot water heater for heating hot water is provided.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technology, since it is possible to supply cold water and hot water at the same time, the number of devices increases, and the number of piping systems connecting these devices also increases, which leads to an increase in the size of the device and complexity of maintenance. There was a problem.

An object of the present invention is to enable simultaneous supply of cold water and hot water without increasing the size of the device and complicating maintenance.

[0005]

[Means for Solving the Problems]

 The above-mentioned problems include a high temperature regenerator for heating a dilute solution obtained by dissolving an absorbent in a refrigerant, a separator for separating a refrigerant vapor and a solution from a dilute solution heated by the high temperature regenerator, and the separator. And a condenser for cooling and condensing the cooling medium vapor by the cooling means to condense and liquefy the cooling medium vapor, and a liquid refrigerant generated in the condenser, which is equipped with an evaporation coil. An evaporator that evaporates above to cool the fluid in the evaporation coil, and absorption heat that produces a dilute solution by absorbing the refrigerant vapor generated in the evaporator in the solution separated in the separator. In an absorption chiller-heater equipped with an absorber for cooling the condenser and a means for communicating the separator and the evaporator through a valve, the condenser is provided as a cooling means for cooling the refrigerant vapor in the condenser. At least each one circulates a cooling medium One line of which is achieved by obtaining Bei the coil of the at least two lines connectable to the hot water load, and means for controlling independently the circulation of the cooling medium in the coil of the two systems.

The above-mentioned problems also include a high temperature regenerator that heats a dilute solution obtained by dissolving an absorbent in a refrigerant, and a separator that separates the refrigerant vapor and the solution from the dilute solution heated by the high temperature regenerator. A condenser for cooling the refrigerant vapor separated by the separator, the condenser for cooling the refrigerant vapor by the cooling means to condense and liquefy, and a liquid refrigerant produced by the condenser having an evaporation coil Is evaporated on the evaporation coil to cool the fluid in the evaporation coil, and the solution separated by the separator absorbs the refrigerant vapor generated in the evaporator to form a dilute solution. In an absorption chiller-heater comprising an absorber for cooling the generated heat of absorption and a means for communicating the separator and the evaporator via a valve, the cooling means for cooling the refrigerant vapor in the condenser is condensed. It is installed in the vessel to circulate the cooling medium A cooling medium circulating means connectable to a load, a cooling water supply means for forming a cooling water liquid film on the surface of the wall of the condenser separating the refrigerant vapor from the outside air on the outside air side, and air near the cooling water liquid film. And a cooling medium circulating means, a cooling water supply means, and a means for independently controlling the air driving means, and the absorber includes the outside air of the absorber and the refrigerant vapor. A wall of the wall that separates the liquid vapor of the solution on the surface on the side of the refrigerant vapor, a cooling water supply means that forms a liquid film of the cooling water on the surface of the wall on the outside air side, and an air near the liquid surface of the cooling water. It is also achieved by providing an air driving means for causing the fluid to flow.

As means for achieving the above-mentioned object, the absorption chiller-heater without the low-temperature regenerator is described, but the same applies to the double-effect absorption chiller-heater with the low-temperature regenerator. It is possible.

[0008]

[Action]

 When only cold water is required, the cooling medium circulating means installed in the condenser to circulate the cooling medium, or the cooling medium circulating in the coil of the two systems that can be connected to the hot water load is stopped and condensed. Refrigerant vapor in the condenser is cooled by a cooling medium circulated in a coil that is not connected to the hot water load among the coils of the two systems installed in the condenser, or by the cooling water supply means. The cooling water liquid film is formed on the outside surface of the wall surface that separates the outside air and the outside air. When the cooling medium circulated in the coil cools the refrigerant vapor, the heat of condensation is taken out of the condenser by the cooling medium. When the cooling medium vapor is cooled by the cooling water liquid film, the cooling water liquid film which has deprived the heat of condensation is evaporated as vapor in the outside air. The vaporized water vapor is released into the atmosphere together with the air near the liquid film of the cooling water which is made to flow by the air drive means. The liquid refrigerant formed in the condenser is supplied to the evaporator, and the fluid in the evaporation coil is cooled by the evaporation of the liquid refrigerant on the evaporation coil. Cooled fluid is supplied to the load.

When only hot water is required, the separator and the evaporator are communicated with each other, and the refrigerant vapor separated by the separator is directly supplied to the evaporator. Therefore, the refrigerant vapor is not condensed in the condenser, and the cooling means of the condenser is stopped. The refrigerant vapor directly supplied to the evaporator heats the fluid in the evaporation coil to form hot water. This hot water is supplied to the hot water load.

When cold water and hot water are required at the same time, a cooling medium circulating means that is installed in the condenser and can circulate a cooling medium to connect to a hot water load, or connect to a hot water load of two system coils The coil produces hot water, and the evaporator coil of the evaporator produces cold water. When the condenser is equipped with two coils, the circulation of the cooling medium of the coil not connected to the hot water load is stopped, and the heat of condensation of the refrigerant vapor flowing into the condenser can be connected to the hot water load. It is taken into the cooling medium flowing in the coil. The cooling medium that takes in the heat of condensation is supplied to the hot water load. A cooling medium circulating means for circulating a cooling medium in the condenser, a cooling water supply means for forming a cooling water liquid film on the outside air side surface of the wall surface separating the refrigerant vapor of the condenser from the outside air, and the cooling water liquid film. When the air driving means for flowing the air in the vicinity and the means for independently controlling the cooling medium circulating means, the cooling water supplying means and the air driving means are provided, the cooling medium is circulated in the cooling medium circulating means. Then, the cooling water supply means and the air driving means are stopped. The condensation heat of the refrigerant vapor flowing into the condenser is taken into the cooling medium flowing in the cooling medium circulation means. The cooling medium that takes in the heat of condensation is supplied to the hot water load. The generation and supply of cold water in the evaporator are the same as those in the case of supplying the cold water, so the description thereof will be omitted.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing a cooling and heating device configured using an absorption chiller-heater according to a first embodiment of the present invention. The illustrated cooling and heating apparatus includes an absorption chiller-heater 1 including a cooling water coil 1F and a hot water coil 1E in a condenser and an evaporation coil 1K in an evaporator, and a hot water outlet connected to the outlet side of the hot water coil 1E. A header 2A, a hot water pump 6A having a discharge port connected to the inlet side of the hot water coil 1E, a hot water inlet header 2B connected to the inlet side of the hot water pump 6A, and an outlet side of the evaporation coil 1K. Cold water outlet header 2C, cold water pump 6B having a discharge port connected to the inlet side of the evaporation coil 1K, cold water inlet header 2D connected to the inlet side of the cold water pump 6B, and hot water outlet header 2A , The hot water inlet header 2B, the cold water outlet header 2C, the cold water inlet header 2D, the three-way valves 3A, 3B, 4A, 4B, and the second one of the three-way valve 3A. Indoor unit 5A having a coil whose one end is connected to the port and the other end to the second port of the three-way valve 4A, and one end which is connected to the second port of the three-way valve 3B and whose other end is the three-way valve 4B. And an indoor unit 5B having a coil connected to the second port of the indoor unit 5B. The third ports of the three-way valves 3A, 3B, 4A and 4B are connected to the cold water outlet header 2C, the cold water inlet header 2D, the hot water outlet header 2A and the hot water inlet header 2B, respectively.

Further, the absorption chiller-heater 1 includes a regenerator 1A for heating a dilute solution, a separator 1B for separating the dilute solution heated by the regenerator 1A into a refrigerant vapor and a concentrated solution, and the separator. A condenser 1D that cools and condenses the refrigerant vapor separated in 1B with a fluid flowing in the cooling water coil 1F and the hot water coil 1E to form a liquid refrigerant, and an evaporation coil 1K, are generated by the condenser 1D. An evaporator 1G for evaporating the liquid refrigerant on the evaporation coil 1K, a solution heat exchanger 1C for exchanging heat between the concentrated solution separated by the separator 1B and the dilute solution supplied to the regenerator, An absorber 1H for spraying a concentrated solution, which has been heat-exchanged by the solution heat exchanger 1C, onto a cooling water coil 1L provided therein, and absorbing a refrigerant vapor produced by the evaporator 1G to produce a dilute solution. , The solution heat exchanger by sucking and pumping the dilute solution 1 Supplying cooling water to a solution pump 1J that feeds to the regenerator 1A via C, a cooling / heating switching valve 1M installed in a pipe that connects the separator 1B and the absorber 1H, and the cooling water coil 1L. The cooling water pump 1N and the regulating valve 1P interposed in the pipe that connects the cooling water coil 1L and the cooling water coil 1F.

The operation of the cooling and heating device having the above structure will be described below. When both the indoor units 5A and 5B are in the cooling operation, the cooling / heating switching valve 1M is closed, the hot water pump 6A is stopped, and the three-way valves 3A and 3B are both in the positions where the second port and the third port communicate with each other. The three-way valves 4A and 4B are operated to positions where the first port and the second port communicate with each other. Further, the adjusting valve 1P is fully opened, and the cooling water pump 1N and the cooling water pump 6B are operated. In this state, the absorption chiller-heater 1 is cooled. Since the hot water pump 6A is stopped, no fluid flows in the hot water coil 1E, and the cold water cooled by the evaporation of the refrigerant in the evaporation coil 1K is guided to the cold water outlet header 2C, and part of it is three-wayed. Flows to the indoor unit 5A through the valve 3A. The chilled water cooled in the indoor unit 5A is sucked into the chilled water pump 6B through the three-way valve 4A and the chilled water inlet header 2D, and then introduced into the evaporation coil 1K again. The rest of the cold water that exits the cold water outlet header 2C flows to the indoor unit 5B through the three-way valve 3B. The chilled water cooled in the indoor unit 5B flows into the chilled water inlet header 2D through the three-way valve 4B, merges with the chilled water that has passed through the indoor unit 5A, is sucked into the chilled water pump 6B, and is introduced into the evaporation coil 1K again. ..

When the indoor unit 5A is operated by heating and 5B by cooling, the cooling / heating switching valve 1M is closed, the hot water pump 6A, the cooling water pump 1N, and the cold water pump 6B are operated, and the three-way valves 3A, 3B, 4A, 4B is operated to a position where the first port and the second port communicate with each other. Further, the opening degree of the adjusting valve 1P is adjusted to the partial opening degree. In this state, the absorption chiller-heater 1 is cooled. Since the hot water pump 6A is operated, hot water flows through the hot water coil 1E, and the hot water heated by the refrigerant vapor flowing into the condenser and heated is passed through the hot water outlet header 2A and the three-way valve 3A to the room. It flows to machine 5A. The hot water heated by the indoor unit 5A is sucked into the hot water pump 6A through the three-way valve 4A and the hot water inlet header 2B, and then introduced into the hot water coil 1E again. On the other hand, the cold water cooled by the evaporation of the refrigerant in the evaporation coil 1K is guided to the cold water outlet header 2C, and flows into the indoor unit 5B via the three-way valve 3B. The cold water cooled in the indoor unit 5B flows into the cold water inlet header 2D through the three-way valve 4B, is sucked into the cold water pump 6B, and is again introduced into the evaporation coil 1K.

When the indoor units 5A and 5B are both heated, the cooling / heating switching valve 1M is opened, the hot water pump 6A and the cooling water pump 1N are stopped, and the cold water pump 6B is operated. Each of the three-way valves 3A and 3B is operated to a position where the second port and the third port communicate with each other, and the three-way valves 4A and 4B both operate to the position where the first port and the second port communicate with each other. To be operated. Since the cooling water pump 1N is stopped, the opening degree of the regulating valve 1P is irrelevant. In this state, the absorption chiller-heater 1 is heated. Since the cooling / heating switching valve 1M is opened, the concentrated solution separated by the separator 1B directly flows into the bottom of the absorber 1H, and the refrigerant vapor separated by the separator 1B passes through the condenser and the evaporator. It flows into 1G. The water in the evaporation coil 1K is heated by the inflowing refrigerant vapor to become high-temperature hot water and is guided to the cold water outlet header 2C, and a part of the water flows to the indoor unit 5A through the three-way valve 3A. The hot water heated by the indoor unit 5A is sucked into the cold water pump 6B through the three-way valve 4A and the cold water inlet header 2D, and is again introduced into the evaporation coil 1K. Cold water outlet The rest of the hot water that exits the header 2C flows to the indoor unit 5B via the three-way valve 3B. The hot water heated by the indoor unit 5B flows into the cold water inlet header 2D through the three-way valve 4B, merges with the hot water that has passed through the indoor unit 5A, is sucked into the cold water pump 6B, and is again introduced into the evaporation coil 1K. To be done.

When operating the indoor unit 5A for cooling and 5B for heating, the cooling / heating switching valve 1M is closed, the hot water pump 6A, the cooling water pump 1N, and the cold water pump 6B are all operated, and the three-way valves 3A, 3B are operated. , 4A, 4B are operated to positions where the second port and the third port are in communication with each other. Further, the opening degree of the adjusting valve 1P is adjusted to the partial opening degree. In this state, the absorption chiller-heater 1 is cooled. Since the hot water pump 6A is operating, hot water flows through the hot water coil 1E, and the hot water heated by the refrigerant vapor flowing into the condenser and heated is passed through the hot water outlet header 2A and the three-way valve 3B to the indoor unit 5B. Flow to. The hot water heated by the indoor unit 5B is sucked into the hot water pump 6A through the three-way valve 4B and the hot water inlet header 2B, and is again introduced into the hot water coil 1E. On the other hand, the cold water cooled by the evaporation of the refrigerant in the evaporation coil 1K is guided to the cold water outlet header 2C, and flows into the indoor unit 5A via the three-way valve 3A. The cold water cooled in the indoor unit 5A flows into the cold water inlet header 2D through the three-way valve 4A, is sucked into the cold water pump 6B, and is introduced into the evaporation coil 1K again.

FIG. 2 collectively shows the states of the valve and the pump in each of the above operating states. In the figure, 1P-2P indicates that the first port and the second port are in communication.

According to the present embodiment, by adding the hot water coil 1E to the condenser and adding the hot water pump and the piping system, it becomes possible to supply the hot water while supplying the cold water, and thus the structure of the absorption chiller-heater Cooling and heating can be performed simultaneously without complicating.

FIG. 3 shows a second embodiment of the present invention. FIG. 3 is a schematic configuration diagram of an absorption chiller-heater showing an embodiment of the present invention. In FIG. 3, first, a case will be described in which the absorption cold / hot water generator generates cold water during cooling. A high temperature regenerator (regenerator) 301 has a combustion chamber inside, and heats a dilute solution that has absorbed a refrigerant and has a low concentration, and generates a refrigerant vapor from this dilute solution. The separator 302 separates the refrigerant vapor from the intermediate concentrated solution whose concentration has been increased by evaporating the refrigerant vapor, and sends the former to the high temperature solution heat exchanger 307 and the latter to the low temperature regenerator 303. The low temperature regenerator (regenerator) 303 reheats the intermediate concentrated solution whose temperature has been lowered by the high temperature solution heat exchanger 307 with the refrigerant vapor coming from the separator 302, and further generates the refrigerant vapor from the intermediate concentrated solution. Is sent to the condenser 304 and the intermediate concentrated solution itself is made into a concentrated solution, and a part of the refrigerant vapor coming from the separator 302 is condensed to be a refrigerant liquid and sent to the condenser 304. The condenser 304 cools and liquefies the refrigerant vapor generated in the low-temperature regenerator 303 and the refrigerant vapor that has not become the liquid refrigerant in the low-temperature regenerator 303 by using cooling water and air to form a liquid refrigerant and sends it to the evaporator 305. The evaporator 305 is provided with an evaporation coil 305A through which circulating water flows, and the liquid refrigerant sent from the condenser 304 is sprayed to the heat transfer tube 305A using the sprayer 305B, and the liquid cooling medium becomes refrigerant vapor. The circulating water is cooled by utilizing the heat of vaporization. In the absorber 306, the concentrated solution that has passed through the low temperature solution heat exchanger 308 from the low temperature regenerator 303 flows in and is dropped, and this concentrated solution absorbs the refrigerant vapor vaporized in the evaporator 305. A high vacuum is secured in the evaporator 305 by the absorbing action of the absorber 306, and the liquid refrigerant sprayed on the evaporation coil 305A in the evaporator 305 can be immediately evaporated. Further, the absorber 306 is provided with cooling means for cooling when the concentrated solution absorbs the refrigerant vapor and becomes a dilute solution, which will be described later in detail. The high temperature solution heat exchanger 307 exchanges heat between the high temperature intermediate concentrated solution and the low temperature diluted solution, and the low temperature solution heat exchanger 308 exchanges heat between the high temperature concentrated solution and the low temperature diluted solution. In order to improve the heat exchange efficiency, two stages are provided on the high temperature side and the low temperature side. The solution circulation pump 309 absorbs the refrigerant vapor in the absorber 306 to form a dilute solution and sends it to the high temperature regenerator 301 via the low temperature solution heat exchanger 308 and the high temperature solution heat exchanger 307 to circulate it again. It is provided in.

In the condenser 304, as described above, the refrigerant vapor generated in the low temperature regenerator 303 and the refrigerant vapor that has not become the liquid refrigerant in the low temperature regenerator 303 are partially cooled to become the liquid refrigerant. And inflow. These must be cooled in the condenser 304 and all must be used as liquid refrigerant, but for this purpose, heat exchange must be performed between the refrigerant vapor and the cooling medium. In the embodiment shown in FIG. 1, the cooling water coil 1F is provided to perform this heat exchange, but in the embodiment shown in FIG. 3, the inside is used as the heat exchanger portion for heat exchange. A plurality of hollow vertically elongated tubes 310 are arranged in the condenser 304. Then, in order to form a falling liquid film of cooling water on the inner wall surface of the pipe 310, cooling water is dropped from above the pipe 310. In order to properly form this falling liquid film, the pipe upper part 310A is formed so as to slightly project from the upper surface 304A of the condenser 304, and the cooling water is formed in a portion formed by the upper surface 304A and the pipe upper part 310A. A liquid pool is created, and the cooling water sent from the condenser sprinkling water supply valve 311 is supplied to this. In this way, the cooling water that overflows the upper end of the pipe 310A flows down while forming a thin liquid film along the inner wall surface of the pipe 310A. On the other hand, the refrigerant vapor flowing into the condenser 304 exists so as to contact the outer wall surface of the pipe 310. As a result, the refrigerant vapor and the cooling water exchange heat via the wall surface of the pipe 310, and the refrigerant vapor is cooled and condensed to become a liquid refrigerant, which flows down along the outer wall surface of the pipe 310 and inside the condenser 304. On the lower surface 304B of the cooling water, and the cooling water obtains heat of condensation and is heated, and a part thereof evaporates. The water vapor evaporated in the pipe 310 in this way is released into the atmosphere together with the air forcedly introduced from below the condenser 304 and the absorber 306 by the cooling fan 312 provided above the condenser 304. .. Reference numeral 313 is a dustproof filter when introducing air, and reference numeral 314 is an opening / closing shutter when discharging air.

Further, in the evaporator 304, a hot water coil 1 E, one end of which is connected to the hot water pump 6 A, is spirally arranged outside the pipe 310, and the circulating water in the hot water coil 1 E is evaporated. It is configured to exchange heat with the refrigerant vapor flowing into the container 304. That is, the refrigerant vapor flowing into the condenser 304 is condensed by exchanging heat with the circulating water when the circulating water is circulated in the hot water coil 1E, and the cooling water flows along the inner peripheral surface of the pipe 310. When it is lowered to form a liquid film surface, it exchanges heat with the liquid film and is condensed. Of course, it is also possible to perform heat exchange simultaneously with both the circulating water in the hot water coil 1E and the liquid film on the inner peripheral surface of the pipe 310. When performing only cooling, it is not necessary to produce hot water, so the hot water pump 6A is stopped.

Next, the concentrated solution formed in the low temperature regenerator 303 as described above flows into the absorber 306 through the low temperature solution heat exchanger 308 and is provided on the side surface of the absorber 306. The refrigerant vapor generated in the evaporator 305 flows in. The concentrated solution absorbs the refrigerant vapor flowing from the evaporator to become a dilute solution, but when the concentrated solution absorbs the refrigerant vapor, heat of absorption is generated. As the temperature of the concentrated solution rises, the ability to absorb the refrigerant vapor decreases, so it is necessary to remove the generated heat of absorption in order to continuously evaporate the refrigerant vapor in the evaporator. For that purpose, heat exchange must be performed between the concentrated solution absorbing the refrigerant vapor (absorption solution in the process of changing from the concentrated solution to the dilute solution) and the cooling medium. As a heat exchanger portion for performing this heat exchange, as in the condenser 304, a plurality of hollow, vertically elongated tubes 315 are provided in the absorber 306. The upper part of the pipe 315A is formed so as to slightly project from the upper surface 306A of the absorber 306 in order to form a falling liquid film of the cooling water on the inner wall surface of the pipe 315, which also constitutes a liquid pool. Since it is the same as the case of 304, detailed description thereof will be omitted. Cooling water is supplied to the liquid pool by a cooling water pipe provided with an absorber watering water supply valve 316. Further, the concentrated solution that has flowed into the absorber 306 is dropped onto the outer wall surface of the pipe 315 so as to come into contact with the upper end of the pipe, and flows down while forming a liquid film. As a result, the concentrated solution flowing down the wall surface of the pipe 315 while forming a liquid film absorbs the refrigerant vapor while generating heat of absorption, and becomes a diluted solution and flows to the lower surface 306B of the absorber 306. As described above, the cooling water is dropped onto the inner peripheral surface of the pipe 315 while forming a liquid film, and the liquid film of the cooling water flows through the pipe wall of the pipe 315 to the outer peripheral surface of the pipe 315. It absorbs the heat of absorption generated in and evaporates.

The pipe 310 and the pipe 315 are arranged such that the hollow portions of the pipe 310 and the pipe 315 communicate with each other, and the outside air sucked by the cooling fan 312 passes through the hollow portion of the pipe 315 and then the pipe 310. Pass through the hollow part. As in the case of the condenser 4, the cooling water taking in the absorbed heat produces steam, which is released into the atmosphere by the air forcedly introduced into the pipe 315.

In the case of the absorber 306, the concentrated solution drops from the upper end of the pipe 315 and flows down while absorbing the refrigerant vapor, so that the solution concentration decreases as it goes downward. For this reason, the lower part of the tube needs to be cooled to a lower temperature than the upper part, but according to the configuration of the present invention, the air introduced from the lower part has a dry-bulb temperature. Both the wet-bulb temperature is low, and the dry-bulb temperature increases as the temperature rises. Both wet bulb temperatures increase. Therefore, it is an extremely rational heat exchanger and has the advantage of increasing the temperature difference in heat exchange.

A case of generating hot water during heating of the absorption chiller-heater will be described. In this case, the cooling / heating switching valve 1M provided in the pipe line connecting the separator 2 and the evaporator 5 is opened. As a result, the solution and refrigerant vapor heated in the high temperature regenerator 301 are directly guided to the evaporator 5 and exchange heat with the circulating water in the evaporation coil 305A to generate hot water. This hot water is supplied to the hot water load. The refrigerant vapor gives heat to the circulating water, and the refrigerant vapor is cooled and condensed to become a liquid refrigerant, mixed with the solution, and sent again to the high temperature regenerator 301 by the solution circulation pump 309. At this time, the cooling devices of the condenser 4 and the absorber 6 used for cooling when generating the cold water are stopped. That is, the condenser water sprinkling water supply valve 311 and the absorber water sprinkling water supply valve 316 are closed, the dropping of the cooling water is stopped, and the hot water pump 6A is also stopped. The operation of the cooling fan 12 is also stopped, and the shutter 14 that has been opened and closed in synchronization with the operation of the cooling fan 12 is closed to prevent heat radiation from the inner surfaces of the condenser 4 and the absorber 6 due to air convection. I have to.

When supplying cold water and hot water at the same time, the condenser sprinkling water supply valve 311 is closed and the hot water pump 6A is operated. The absorber sprinkling water supply valve 316 is opened, cooling water is supplied to the inner peripheral surface of the pipe 315, and the cooling fan 312 is operated. The refrigerant vapor flowing into the condenser 304 is cooled and condensed by the circulating water flowing in the hot water coil 1E to become a liquid refrigerant, which is sprayed from the sprayer 305B onto the evaporation coil 305A. The circulating water in the hot water coil 1E removes the heat of condensation from the refrigerant vapor to become hot water, and this hot water is supplied to the hot water load. The liquid refrigerant sprayed on the evaporation coil 305A absorbs the heat of evaporation from the circulating water in the evaporation coil 305A to evaporate, is dropped on the outer peripheral surface of the pipe 315, and is absorbed by the concentrated solution flowing down to form a liquid film. It The generated absorption heat is dropped onto the inner peripheral surface of the pipe 315 and is taken in by the cooling water that forms a liquid film and flows down. The cooling water that has taken up the absorption heat evaporates as water vapor. The steam is driven by the cooling fan 312 and is discharged into the atmosphere together with the outside air passing through the hollow portions of the tubes 315 and 310. That is, when only hot water is supplied, hot water is generated by the evaporation coil, whereas when hot water and cold water are supplied simultaneously, cold water is generated by the evaporation coil and hot water is generated by the hot water coil, respectively. It will be supplied.

FIG. 4 is a schematic configuration diagram showing a third embodiment of the present invention, in which a cooling device using a hollow vertically elongated tube as a heat exchanger portion of the condenser 304 and the absorber 306 is used. The structure is the same as in the case of FIG. The only difference is that the condenser 304 and the absorber 306 are arranged in series in the second embodiment, whereas they are arranged in parallel in the case of the present embodiment. Is. Further, the condenser cooling fan 312B for discharging the water vapor generated in the pipe 310 of the condenser 304 to the atmosphere is provided separately from the cooling fan 312A for discharging the water vapor generated in the pipe 315 of the absorber 306 to the atmosphere. is there. Since the other points are the same as those in FIG. 3, detailed description will be omitted. The same reference numerals as those used in FIG. 3 have the same operations and operations.

In the present embodiment, when only cold water is supplied, the hot water pump 6A is stopped, the condenser water sprinkling water supply valve 311 and the absorber water sprinkling water supply valve 316 are all opened, and the condenser cooling fan 312B and the cooling water are supplied. All the fans 312A are operated. Cold water is generated and supplied in the evaporation coil 305A. When supplying only hot water, the hot water pump 6A is stopped, the condenser sprinkling water supply valve 311 and the absorber sprinkling water supply valve 316 are closed, and both the condenser cooling fan 312B and the cooling fan 312A are stopped. R. Further, the cooling / heating switching valve 1M is opened, and the circulating water in the evaporation coil 305A is heated by the refrigerant vapor flowing from the separator to the evaporator via the cooling / heating switching valve 1M to become warm water. The refrigerant liquefied by removing the heat of condensation flows into the evaporator / absorber from the separator and is mixed with the solution flowing at the bottom of the evaporator to become a dilute solution, and the solution pump 309 causes the low-temperature solution heat exchanger 308 to again It is sent to the high temperature regenerator 301 via the high temperature solution heat exchanger 307. The hot water is generated by the evaporation coil 305A and supplied to the load.

When hot water and cold water are supplied at the same time, the hot water pump 6A is operated, the condenser water sprinkling water supply valve 311 is closed, the absorber water sprinkling water supply valve 316 is opened, and the condenser cooling fan 312B is stopped. The cooling fan 312A is operated. Further, the cooling / heating switching valve 1 M is closed. The refrigerant vapor flowing into the condenser 304 is deprived of the heat of condensation by the circulating water flowing in the hot water coil 1E to be condensed and liquefied to become a liquid refrigerant, which is then sprayed from the sprayer 305B onto the evaporation coil 305A. The circulating water that has deprived the heat of condensation becomes hot water and is supplied to the hot water load. The liquid refrigerant sprayed on the evaporation coil 305A takes the evaporation heat from the circulating water in the evaporation coil to evaporate, and the circulating water becomes cold water and is supplied to the cold water load. The evaporated refrigerant vapor is dropped on the outer peripheral surface of the pipe 315, is absorbed by the concentrated solution that forms a liquid film and flows down, and becomes a dilute solution. The absorbed heat generated on the outer peripheral surface of the pipe 315 in the process of being absorbed is dropped along the inner peripheral surface of the pipe 315, and is taken into the cooling water flowing down in the form of a liquid film. The cooling water that has absorbed the absorbed heat becomes water vapor and evaporates, and is released into the atmosphere together with the outside air driven by the cooling fan 312A. The dilute solution formed on the outer peripheral surface of the pipe 315 is sucked by the solution pump 309 through the lower portion 306B of the absorber / evaporator, and is regenerated at a high temperature through the low temperature solution heat exchanger 308 and the high temperature solution heat exchanger 307. Sent to the vessel 301. The hot water is generated by the hot water coil 1E and supplied to the hot water load, and the cold water is generated by the evaporation coil 305A and supplied to the cold water load.

FIG. 5 is a schematic block diagram of the fourth embodiment of the present invention. In this embodiment, the condenser 304 and the absorber 306 are integrally provided in series with the cooling water and the cooling air as in FIG. Then, a plurality of vertically elongated plates 317 are used as the heat exchanger portions of the condenser 304 and the absorber 306, and are used in the shape shown in the cross section in FIG. 306 outer surface 304C. A cooling unit is configured by forming a hollow portion 318 between the cooling unit and 306C. Cooling water flows through the hollow portion 318 along the inner wall surface of the plate 17 from above while forming a liquid film, and the air forcedly introduced by the cooling fan 312 flows from below to above. The water vapor generated by the flow is released into the atmosphere. In order to form a falling liquid film on the inner wall surface of the plate 317, similarly to FIG. 3, a pool of cooling water is provided in a portion formed by the upper surface 304A of the condenser 304 and the plate upper portion 317A. .. Cooling water is supplied to the liquid pool by a water supply pipe provided with a condenser water spray supply valve 311. As a result, as in the case of the pipe in FIG. 3, heat exchange is performed through the wall surface of the plate 317, and the condenser 304 is cooled. The operation is the same as the case of using the tube in FIG. 3, so detailed description will be omitted. Further, in this embodiment, the condenser 304 and the absorber 306 are configured in series, but the lower surface 304B of the condenser 304 and the upper surface 306A of the absorber 306 are configured separately, and the upper surface 306A of the absorber 306 and the pre-assembler A cooling water reservoir is provided in a portion formed with the upper part 317B. Cooling water is supplied to this liquid pool by a water supply pipe provided with an absorber watering water supply valve 316. As a result, heat is exchanged through the wall surface of the plate 317 to cool the absorber 306 as in the case of the pipe in FIG. The operation is the same as that of the case of using the tube in FIG. 3, so detailed description will be omitted. The evaporator 305 is provided inside the plate 317 formed in the absorber 306. The cooled refrigerant vapor becomes a liquid refrigerant on the lower surface 304B of the condenser 4, and the concentrated solution that is also cooled and absorbs the refrigerant vapor becomes a dilute solution and accumulates on the lower surface 306B of the absorber 306. The same as in the case of using a tube in 3. The parts other than the condenser and the absorber in this embodiment are the same in operation and operation as described in FIG.

In this embodiment, when hot water is supplied, cold water is supplied, and hot water and cold water are supplied at the same time, the operation of the pump, valve, and cooling fan is the same as in the case of the second embodiment. Therefore, the description will be omitted.

FIG. 7 shows a cooling and heating apparatus configured by using the absorption chiller-heater shown in FIGS. 3, 4 and 5, and is described using the same reference numerals as those in FIG. 1, so a detailed description will be given. Omit it. Although details of the absorption chiller / heater are not described, any of the absorption chiller / heaters shown in FIGS. 3, 4 and 5 may be applied.

FIG. 8 shows a pump, a valve, and a pump for each combination of operating the indoor units 5A and 5B for cooling or heating when the absorption chiller-heater shown in FIG. 3 is used as the absorption chiller-heater. The operation state of the cooling fan is shown. The definition of the port of the three-way valve is the same as in the case of the first embodiment. When the absorption chiller-heater shown in FIG. 5 is used as the absorption chiller-heater, the same operation state is obtained.

FIG. 9 shows the operating states of the pump, the valve, and the cooling fan when the absorption chiller-heater shown in FIG. 4 is used as the absorption chiller-heater.

According to the second, third and fourth embodiments, since the absorber and the condenser are cooled by the latent heat of vaporization of the cooling water, the heat transfer efficiency is good and the heat transfer area is small. Therefore, the equipment can be made compact, a cooling tower for cooling water radiation is not required, and in the absorber, the temperature change of heat exchange can be rationally arranged, so the temperature difference of heat exchange can be increased and the equipment It has the effect of being compact.

[0036]

[Effect of the device]

 According to the present invention, the condenser is provided with the cooling medium circulating means connected to the hot water load and the cooling means not connected to the hot water load, so that when the cold water load and the hot water load are simultaneously applied, the evaporation coil of the evaporator is While the cold water is generated by the condenser, the cooling means of the condenser that is not connected to the hot water load is stopped, and the heat of condensation of the refrigerant vapor flowing into the condenser is taken into the cooling medium that flows through the cooling medium circulating means that is connected to the hot water load. As a result, cold water and hot water can be supplied at the same time without adding additional equipment such as heat exchangers.

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing an operating state of a device corresponding to a load state of the embodiment shown in FIG.

FIG. 3 is a system diagram showing a configuration of a second embodiment of the present invention.

FIG. 4 is a system diagram showing a configuration of a third embodiment of the present invention.

FIG. 5 is a system diagram showing a configuration of a fourth embodiment of the present invention.

6 is a plan view showing a cross section taken along the line AA of FIG.

FIG. 7 is a system diagram showing a configuration of a cooling and heating apparatus to which second, third and fourth embodiments of the present invention are applied.

FIG. 8 is a diagram showing an operating state of a device corresponding to a load state of the cooling and heating apparatus of FIG. 7 to which the embodiment shown in FIGS. 3 and 5 is applied.

9 is a diagram showing an operating state of a device corresponding to a load state of the cooling and heating apparatus of FIG. 7 to which the embodiment shown in FIG. 4 is applied.

FIG. 10 is a system diagram showing an example of a conventional technique.

[Explanation of symbols]

1 Absorption chiller / heater 1A High temperature regenerator 1B Separator 1C Solution heat exchanger 1D Condenser 1E Hot water coil 1F Cooling water coil 1G Evaporator 1H Absorber 1J Solution pump 1K Evaporating coil 1L Cooling water coil 1M Cooling / heating switching valve 1N Cooling water Pump 1P Regulator 2A Hot water outlet header 2B Hot water inlet header 2C Hot water outlet header 2D Hot water inlet header 3A, 3B, 4A, 4B Three-way valve 5A, 5B Indoor unit 6A Hot water pump 6B Cold water pump 301 High temperature regenerator 302 Separator 303 Low temperature regeneration Container 304 Condenser 304A Condenser top 304B Condenser bottom 305 Evaporator 305A Evaporation coil 305B Disperser 306 Absorber 306A Absorber top 306B Absorber bottom 307 High temperature solution heat exchanger 308 Low temperature solution heat exchanger 309 Solution pump 310 Tube 310A Pipe top 11 condenser sprinkler feed valve 312,312A cooling fan 312B condenser cooling fan 313 filter 314 shutter 315 tubes 315A tube top 316 absorber sprinkler water supply valve 317 plate 317A plate upper 318 space

Claims (3)

[Scope of utility model registration request] 1. A high temperature regenerator for heating a dilute solution obtained by dissolving an absorbent in a refrigerant, a separator for separating a refrigerant vapor and a solution from the dilute solution heated by the high temperature regenerator, and the separator. And a condenser for cooling and condensing the refrigerant vapor by the cooling means to condense and liquefy the refrigerant vapor separated by the cooling means, and a liquid refrigerant generated in the condenser, which is equipped with an evaporation coil, on the evaporation coil. An evaporator for evaporating the fluid in the evaporating coil to cool the fluid in the evaporating coil, and a solution separated by the separator to absorb the refrigerant vapor generated in the evaporator to form a dilute solution and cool the generated heat of absorption. In an absorption chiller-heater comprising an absorber and means for communicating the separator and the evaporator via a valve, cooling means for cooling the refrigerant vapor in the condenser is installed in the condenser and cooled respectively. At least two systems that circulate the medium Absorption, at least one of which is connectable to a hot water load and which is provided with means for independently controlling the circulation of the cooling medium in the coils of the two systems. Hot and cold water machine. 2. A high temperature regenerator for heating a dilute solution obtained by dissolving an absorbent in a refrigerant, a separator for separating the refrigerant vapor and the solution from the dilute solution heated by the high temperature regenerator, and the separator. And a condenser for cooling and condensing the refrigerant vapor by the cooling means to condense and liquefy the refrigerant vapor separated by the cooling means, and a liquid refrigerant generated in the condenser, which is equipped with an evaporation coil, on the evaporation coil. An evaporator for evaporating the fluid in the evaporating coil to cool the fluid in the evaporating coil, and a solution separated by the separator to absorb the refrigerant vapor generated in the evaporator to form a dilute solution and cool the generated heat of absorption. In an absorption chiller-heater comprising an absorber and means for communicating the separator and the evaporator via a valve, a cooling means for cooling the refrigerant vapor in the condenser is installed in the condenser and is a cooling medium. Coolant circulation that can be connected to a hot water load by circulating A ring means, a cooling water supply means for forming a cooling water liquid film on the surface of the wall surface that separates the refrigerant vapor and the outside air from the outside air, and an air driving means for flowing air in the vicinity of the cooling water liquid film, A means for independently controlling the cooling medium circulating means, the cooling water supply means, and the air driving means, and the absorber is a solution on the refrigerant vapor side surface of the wall surface separating the refrigerant vapor from the outside air of the absorber. Of the liquid wall, cooling water supply means for forming a cooling water liquid film on the surface of the wall surface on the outside air side, and air driving means for flowing air in the vicinity of the cooling water liquid film. Absorption chiller / heater characterized by 3. A solution heat exchanger for exchanging heat between the solution separated by the separator and the dilute solution produced by the absorber, and the solution passed through the solution heat exchanger is separated by the separator. A low-temperature regenerator that heats with refrigerant vapor to generate new refrigerant vapor, and refrigerant that has finished heating in the low-temperature regenerator and refrigerant vapor that is newly generated in the low-temperature regenerator are both introduced into the condenser. It is comprised as follows, Claim 1 characterized by the above-mentioned.
Or the absorption chiller-heater according to 2.