KR900007721B1 - Absorption type cooled water and warm water supplier - Google Patents

Abstract

An absorption refrigeration system switchable from cooling to heating operation has an extra generator producing coolant vapour heated by coolant vapour from a first generator coupled with a heat source. The main conduit between condenser and evaporator has U-shaped system section and the condensate conduit between these two components includes a throttle. Pressurised liquid coolant is distributed in the upper evaporator zone with a branch line and delivered to the lower end of the main conduit. Liquefied coolant flows from the evaporator to the absorber. During heating, coolant vapour in the main line removes liquid coolant barrier.

Description

Absorption cold water heater

1 is a schematic diagram of a first embodiment of the present invention;

2 is a schematic diagram of a second embodiment of the present invention;

3 is a schematic diagram of a third embodiment of the present invention;

4 is a schematic diagram of a fourth embodiment of the present invention;

5 is a schematic diagram of a fifth embodiment of the present invention;

6 is a schematic diagram of a sixth embodiment of the present invention;

7 is a schematic diagram of a seventh embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: first generator 1A: heating source

2: 2nd generator 2A: heating tube

3: condenser 3A, 5A: cooling water pipe

4: Cold water / hot water heat exchanger 4A: Heat pipe

5: absorber 6: first heat exchanger

7: second heat exchanger 8: solution supply passage

9: solution return passage 10: refrigerant liquid conduit

10A: Throttle means 11: Main refrigerant vapor passage

12: refrigerant liquid circulator 13: float valve

14: refrigerant liquid blower 15: seal liquid supply pipe

16: ejector 17: throttle means

20, 21: separator 22: nutrient solution tube

26, 32: gas-liquid separator

The present invention relates to an absorption chiller and water heater used for cooling and heating indoors.

U.S. Patent No. 3,605,873 is known as an absorption chiller and water heater. In this type of absorption cold / hot water machine, the operation of taking out the cold water and the operation of taking out the hot water are connected with a regenerator and an evaporator through a passage, and an opening / closing valve is installed in the passage and the opening / closing valve is closed during the operation of taking out cold water. When the hot water is taken out, the open / close valve is opened to introduce the refrigerant vapor of the regenerator into the evaporator, and the water flowing in the tube of the evaporator is heated to obtain hot water.

However, in the operation of taking out the hot water, since the refrigerant vapor flows through the passage, a passage having a larger diameter (inner diameter) and an on / off valve are required to flow the same weight than that of the liquid. In addition, on-off valves require a dedicated operating device.

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorption cold / hot water selector that can select to take hot water or cold water out of the heat exchanger without having an on / off valve in the main refrigerant vapor passage connected to the heat exchanger for selectively producing hot water and cold water. will be.

Another object of the present invention is to provide an absorption cold / hot water heater in which the selection operation of taking hot water from the heat exchanger for selectively generating hot water and cold water or taking out cold water can be simplified.

The present invention has a main refrigerant vapor passage for transferring the refrigerant vapor generated by the generator to a heat exchanger that selectively generates hot water and cold water in order to achieve the above object, the refrigerant vapor during cold water generation in the main refrigerant vapor passage It is to install a sealing means using a liquid that operates to stop the flow of.

1 is a system diagram showing a first embodiment of the present invention. The first generator 1 includes a lithium bromide (LiBr) aqueous solution (a mixture of an absorbent and a refrigerant) in which the burner includes a heating source 1A such as superheated steam, and is housed therein by the heating source 1A. Heating generates refrigerant steam. The second generator (2) has a heating tube (2A), the inlet of the heating tube (2A) is connected to the first generator (1), the refrigerant vapor generated by the first generator (1) is a heating tube It introduces into (2A) and uses the refrigerant | coolant steam produced by the 1st generator 1 as a heating source. The condenser 3 has a cooling water pipe 3A, is connected to the second generator 2, the cooling water is circulated in the cooling water pipe 3A during the quenching operation, and the circulation of the cooling water is stopped during the heater operation. The cold water / hot water heat exchanger 4 selectively produces cold water and hot water, and has a heat transfer tube 4A through which cold water or hot water circulates. The absorber 5 has a cooling water pipe 5A, and is connected to the cold / hot water heat exchanger 4, and the cooling water is circulated in the cooling water pipe 5A during the quenching operation, and the circulation of the cooling water in the heater operation is Is stopped. The first heat exchanger 6 exchanges heat between the aqueous solution sent out from the absorber 5 and the aqueous solution flowing into the absorber 5. The second heat exchanger 7 exchanges heat between the aqueous solution transferred to the first generator 1 and the aqueous solution flowing out of the first generator 1. The solution supply passage 8 is composed of five parts 8A, 8B, 8C, 8D, and 8E, and includes an absorber 5, a first generator 1, and a second generator 2 ). A solution pump 8P is disposed between the passage 8A and the passage 8B, a first heat exchanger 6 is disposed between the passage 8B and the passage 8C, and the passage 8C and the passage. The second heat exchanger 7 is arranged between the 8Ds. The passage 8E branches in the middle of the passage 8C. The solution return passage (9) consists of four parts (9A), (9B), (9C), and (9D), and connects the first generator (1), the second generator (2), and the absorber (5). . The second heat exchanger 7 is disposed between the passage 9A and the passage 9B, and the first heat exchanger 6 is disposed between the passage 9B and the passage 9D, and the passage 9C is Join the passage 9B. The refrigerant liquid conduit 10 connects the condenser 3 and the cold / hot water heat exchanger 4 and has a throttle means 10A such as an orifice or a throttle valve in the middle. Also, the refrigerant refrigerant conduit 10 is curved in a U shape, and the refrigerant liquid is always accumulated in the U-shaped portion and a U seal is formed. This prevents the refrigerant vapor of the condenser 3 from flowing into the cold / hot water heat exchanger 4. The main refrigerant vapor passage (11) connects the condenser (3) and the cold / hot water heat exchanger (4), and has a U seal portion (11A) having a height of about 1m curved in a U shape on the way. The main refrigerant vapor passage (11) guides the refrigerant vapor to the cold / hot water heat exchanger (4) via the main refrigerant vapor passage (11) during the operation of the heater. The refrigerant liquid circulation device 12 includes a refrigerant liquid pump 12A connected to the cold / hot water heat exchanger 4, a conduit 12B connected to the discharge side of the refrigerant liquid pump 12A, and a conduit 12B. It consists of a connected spray header 12C. The float valve 13 is arranged in the middle of the conduit 12 and adjusts the discharge flow rate of the refrigerant liquid pump 12A in accordance with the liquid level of the refrigerant liquid of the cold water / hot water heat exchanger 4. In the state where the liquid level is lower than the rust level, the discharge flow rate is limited to zero or close to the flow rate, and cavitation generated when the refrigerant liquid sucked into the refrigerant liquid pump 12A is insufficient. The refrigerant liquid flow device 14 is composed of a blow pipe 14A and an on-off valve 14B disposed in the blow pipe 14A, and the blow pipe 14A is a float valve 13 in the interlude 12B. At a position between the spray header 12C and the opening 14C is opened into the absorber 5. The sealing liquid supply pipe 15 is connected to the conduit 12B and near the lower end of the U seal portion 11A of the main refrigerant vapor passage 11.

The ejector 16 is a type of pump, also called a jet pump, and the ejector 16 generally includes a diffuser having a gradually enlarged flow path area of the nozzle and a section installed around the nozzle, and the nozzle of the ejector is a pump ( 8P) is connected to the conduit 16A branched from the discharge tube, the section portion is connected to the thick solution system via the low temperature heat exchanger 6 in the conduit 9, the diffuser is connected to the conduit 9D to effect the Venturi effect It is pumped by. When the pump 8P is operated, a high pressure dilute solution is ejected from the nozzle of the ejector 16 toward the diffuser via the conduit 16A branched from the discharge tube, and the liquid in the section is accompanied by the kinetic energy to lower the pressure. The thick solution via the low temperature heat exchanger (6) is introduced into the conduit (9) and the kinetic energy becomes slower as the flow velocity becomes slower as the flow path area of the mixed solution of the dilute solution and the thick solution is gradually enlarged by the diffuser. Is changed to a pressure head so that the solution via the low temperature heat exchanger 6 is pumped and sprayed onto the heat transfer tube group by the spray header 18 via the conduit 9D. Reference numeral 17 denotes a throttle means such as an orifice or a throttle valve, reference numerals 18 and 19 denote spray headers, and reference numerals 20 and 21 denote separators for separating water droplets into the refrigerant vapor.

Next, the operation of this embodiment will be described.

In the so-called cooling operation in which cold water is generated by the cold / hot water heat exchanger 4, the opening / closing valve 14B of the refrigerant liquid blow device 4 is closed, and the refrigerant liquid discharged from the refrigerant liquid pump 12A is sealed. Via the liquid supply pipe 15 to be transferred to the U seal portion (11A) of the main refrigerant vapor passage (11).

The heating source 1A is operated to heat the aqueous lithium bromide solution in the first generator 1 to generate steam (refrigerant vapor). This refrigerant vapor is led into the inside of the heating tube 2A of the second generator 2, and generates a refrigerant vapor by heating the lithium bromide aqueous solution sprayed from the spray header 19 to the outside of the heating tube 2A. When the aqueous lithium bromide solution is heated, the refrigerant vapor in the heating tube 2A discharges heat to condense and flows through the throttle means 17 to the condenser 3. The refrigerant vapor generated by the second generator 2 is led to the condenser 3 through the separator 21. Here, the water is cooled by the cooling water passing through the cooling water pipe 3A to condense to form a refrigerant liquid. The refrigerant liquid in the condenser 3 flows into the cold / hot water heat exchanger 4 via the refrigerant liquid conduit 1 and the throttle means 10A. In the cold / hot water heat exchanger 4, the coolant liquid is sprayed by the coolant pump 12A to cool the water flowing in the heat transfer pipe 4A. This produces cold water. Since the refrigerant liquid absorbs heat as water when the water is cooled, the refrigerant liquid evaporates to form refrigerant vapor, and the refrigerant refrigerant flows into the absorber 5 through the separator 20. After entering the absorber 5, the lithium bromide solution is absorbed by the lithium bromide aqueous solution sprayed from the spray header 18, and the proportion of the refrigerant contained in the lithium bromide aqueous solution increases, resulting in a diluted solution. The lithium bromide aqueous solution produced and diluted by the absorber 5 is supplied to both sides of the first generator 1 and the second generator 2. The lithium bromide aqueous solution is supplied to the first generator 1 via the passage 8A, the refrigerant solution pump 8P, the first heat exchanger 6, the passage 8C, the second heat exchanger 7 and the passage 8D. Is transferred to the second generator 2 via the passage 8E and the spray header 19 branched from the passage 8C. It is conveyed to the 1st generator 1 and the 2nd generator 2, and it enters. The ratio of the flow volume of the lithium bromide aqueous solution supplied to the 1st generator 1 and the 2nd generator 2 is about 5: 5. While the cooling operation is continued, a part of the coolant liquid of the cold water / hot water heat exchanger 4 is transferred to the U seal portion 11A of the main refrigerant vapor passage 11 via the seal liquid supply pipe 15 so that the U seal portion ( 11A) is always filled with the refrigerant liquid, and the refrigerant vapor in the condenser 3 cannot pass through the main refrigerant vapor passage 11.

In an absorption chiller using alcohol or water such as methanol as a refrigerant, the pressure difference between the condenser 3 and the cold / hot water exchanger 4 during the cooling operation is small, and the seal state can be maintained by the liquid column head of the refrigerant liquid. For example, under normal operating conditions using water as a refrigerant, the pressure difference is willingly about 0.7 mAq and the height of the entire absorption chiller is approximately 1.5 m or more, so the gas phase part of the condenser 3 and the cold / hot water heat exchanger When the refrigerant liquid is filled in the U-sealing portion 11A of the main refrigerant vapor passage 11 in which (4) is connected, the main refrigerant vapor passage 11 passes from the condenser 3 through the main refrigerant vapor passage 11 by the seal state holding function of the liquid main head. Thus, the circulation of the refrigerant vapor to the cold / hot water heat exchanger (4) can be prevented. However, only by filling the refrigerant liquid, the refrigerant vapor is condensed in the vicinity of the refrigerant liquid surface formed in the U seal portion 11A, and the refrigerant liquid is gradually heated as time passes, and the cold water of the U seal portion 11A is cooled. There is a possibility that the coolant liquid level on the hot water heat exchanger 4 side is boiled again, and the coolant liquid gradually decreases, and the sealing function is destroyed.

Therefore, in the present invention, the cooled refrigerant liquid having a saturation pressure almost equal to the pressure in the cold water / hot water heat exchanger 4 is driven from the seal liquid supply pipe 15 according to the operation of the refrigerant pump 12A during the cooling operation. 11A) is continuously supplied, so that the seal holding function by the liquid column head can be maintained without causing reboiling, and the refrigerant vapor is transferred from the condenser 3 to the cold / hot water heat exchanger 4 via the main refrigerant vapor passage 11. It can realize cooling operation without circulation.

In addition, when the connection place between the seal liquid supply pipe 15 and the main refrigerant vapor passage 11 is connected from the bottom of the U seal portion 11A to the cold water / hot water heat exchanger 4, the condenser (from the bottom of the U seal portion 11A) is connected. The refrigerant liquid toward side 3) hardly moves. In this case, the surface temperature of the refrigerant liquid on the condenser 3 side is almost the condensation temperature, the bottom portion is almost the evaporation temperature, so that a so-called temperature stratification is formed, and the refrigerant vapor is almost condensed on the refrigerant liquid surface on the condenser 3 side. There is no effect, and there exists an effect which can suppress performance degradation.

In the case of the so-called heating operation or heating / hot water supply operation in which hot water is generated by the cold / hot water heat exchanger 4, the circulation of the cooling water of the condenser 3 and the cooling water of the absorber 5 is stopped, and the refrigerant liquid blow device 14 The on / off valve 14B is opened to operate. Then, the refrigerant liquid accumulated in the tank portion 4B of the cold / hot water heat exchanger 4 is discharged to the absorber 5 by the refrigerant pump 12A via the brow pipe 14A and the on / off valve 14B. The refrigerant liquid is hardly supplied to the seal liquid supply pipe 15 branched at a position higher than the blow tube 14A, and the refrigerant liquid is not supplied to the U seal portion 11A. The refrigerant vapor generated by the first generator (1) is introduced into the heating tube (2A) of the second generator (2), heats the lithium bromide aqueous solution sprayed out of the tube to generate refrigerant vapor, and condenses itself to throttle. It enters the condenser 3 via the means 10A. The refrigerant vapor generated in the second generator is guided to the condenser (3), but does not condense because the cooling water does not pass through the cooling water pipe (3A) of the condenser (3), and flows into the main refrigerant vapor passage (11). When the height of the main refrigerant vapor passage 11 toward the cold / hot water heat exchanger 4 is about 1 m, the seal by the liquid column head easily formed in the U seal portion 11A by the refrigerant vapor pressure in the condenser 3 is increased. By destroying the holding function, the refrigerant vapor flows into the cold / hot water heat exchanger (4) through the main refrigerant vapor passage (11) and condenses on the surface of the heat transfer pipe (4A) of the cold / hot water heat exchanger (4). Heats hot water circulating inside and generates hot water for heating or hot water supply.

Even if the refrigerant liquid flows into the U seal portion 11A from the seal liquid supply pipe 15 somewhat, the refrigerant liquid flows into the cold water / hot water heat exchanger 4 together with the refrigerant vapor by the bubble pump action, and does not interfere with the heating operation. Do not.

In addition, the refrigerant flowing through the refrigerant liquid blow-opening valve 14B is a liquid of about 60 ° C., a refrigerant liquid having low corrosiveness (water), and a small flow rate, so that a small diameter inexpensive valve is used.

FIG. 2 is a second embodiment of the present invention, and uses a bubble pump for driving refrigerant vapor as a driving force as a means for transferring refrigerant liquid of a cold water / hot water heat exchanger to an absorber.

The nutrient solution tube 22 is connected to the absorber 5, and the lower end of the nutrient solution tube 22 is connected to the tank portion 4B of the cold / hot water heat exchanger 4 via a conduit 23. . In addition, the subcoolant pipe 24 is connected to the lower end of the nutrient solution pipe (22). The auxiliary refrigerant steam engine 24 is connected to the condenser 3 and has a U seal portion 24A.

The U seal portion 24A is connected to the seal liquid supply pipe 15 via the conduit 15A, and the coolant liquid is also supplied to the U seal portion 24A as the seal liquid during the cooling operation. The U seal portion 24A has a sealing capacity slightly smaller than that of the U seal portion 11A of the main refrigerant vapor passage 11. The refrigerant liquid blow device 14 in the first embodiment has been raised.

The other configuration is the same as in the first embodiment. In the cooling operation, part of the refrigerant liquid discharged from the refrigerant pump 12A is transferred to both U seal portions 11A and 24A through the seal liquid supply pipe 15 so that both U seal portions 11A and 24A are provided. The seal state is maintained at, and the operation as described in the first embodiment is continued to generate cold water. When switching to heating operation, the cooling water circulation is stopped by the cooling water pipe 3A of the condenser 3 and the refrigerant pump 12A is determined. Then, the sealing liquid is not supplied to both the U-sealing portions 11A and 24A, and cooling water is not circulated in the condenser 3, so that the refrigerant vapor pressure in the condenser 3 is increased. Therefore, the seal state of the U seal part 24A of the subsidiary refrigerant increasing engine 24 is first broken, and the refrigerant vapor in the condenser 3 is discharged from the lower end of the nutrient solution pipe 22 through the subsidiary refrigerant increasing engine 24. As a result, a bubble pump for driving the refrigerant vapor is operated, and the refrigerant liquid flowing from the tank portion 4B of the cold / hot water heat exchanger 4 to the nutrient solution pipe 22 through the conduit 23 is absorbed by the bubble pump. 5) is inhaled. The coolant liquid is then mixed with the lithium bromide aqueous solution sprayed from the spray header 18 in the absorber 5 and transferred to the first generator 1 and the second generator 2 by the solution pump 8P.

3 is a third embodiment of the present invention, wherein the attachment position of the inlet of the auxiliary coolant increaser 24 in the second embodiment is changed to the heating tube 2A, and the intermediate of the auxiliary coolant increaser 24 is shown. The on-off valve 25 is installed in the valve.

In this embodiment, when the cooling water circulation of the condenser 3 and the absorber 5 is stopped, the refrigerant pump 12A is stopped, and the opening / closing valve 25 is opened, the heating operation to take out hot water from the cold / hot water heat exchanger 4. Becomes

4 is a fourth embodiment of the present invention, in which the main refrigerant steam passage 11 and the auxiliary refrigerant steam engine 24 are common passages. Note refrigerant vapor passage (11) has two U-sealed portion (11A _1), the 2U-sealed portion (11A of the inlet primary refrigerant vapor passage 11 of the equipped, and the auxiliary refrigerant steam pipes (24) to (11A _{2) 2} ) Is coupled near. The gas-liquid separator 26 is attached to the outlet of the nutrient solution pipe 22, and the gas-liquid separator 26 and the cold / hot water heat exchanger 4 are connected to the gas conduit 28. The other configuration is the same as that of FIG. 2 (second embodiment) and the operation is the same as that of the second embodiment.

5 is a fifth embodiment of the present invention, in which both sides of the main refrigerant vapor passage and the auxiliary refrigerant steam engine are one passage. In this embodiment, the outlet of the main refrigerant vapor passage 11 is opened to the lower end of the nutrient solution pipe 22. The other configuration is the same as that in FIG. In this embodiment, the bubble pump action is exerted by the refrigerant vapor passing through the main refrigerant vapor passage 11 during the heating operation. The refrigerant vapor flowing into the absorber (5) through the nutrient solution pipe (22) flows through the separator (20) into the cold / hot water heat exchanger (4) and heats the hot water through the heat pipe (4A) for heating or heating. Create hot water.

6 is a sixth embodiment of the present invention, in which a gas-liquid separator 26 is provided at the outlet of the nutrient solution pipe 22 shown in FIG. In this embodiment, during the heating operation, the refrigerant vapor in the condenser 3 flows out through the main refrigerant vapor passage 11 through the opening 27 into the gas-liquid separator 26 and the remainder flows through the nutrient solution pipe 22. It exhibits a bubble pumping effect and is transferred to the absorber 5 of the refrigerant liquid of the tank portion 4B of the cold / hot water heat exchanger 4. The refrigerant vapor introduced into the gas-liquid separator 26 via the nutrient solution pipe 22 and the refrigerant vapor introduced into the gas-liquid separator 26 via the opening 27 are passed through the gas conduit 28 to form a cold / hot water heat exchanger. 4) flows into the hot water through the heat transfer pipe (4A) to produce hot water for heating or hot water supply.

7 is a seventh embodiment of the present invention, in which the first generator is a flow-through type. This embodiment is used in combination with each of the first, second, third, fourth, fifth and sixth embodiments. The first generator 29 includes a combustor 30, a solution tube 31, a gas-liquid separator 32, a bypass tube 33, a float chamber 34, and a float valve 35. In the case of combining this embodiment with the embodiment of FIG. 2, the inlet of the auxiliary refrigerant steam engine 24 is connected to the heating tube 2A.

The lithium bromide aqueous solution transferred from the absorber 5 (not shown) by the solution pump 8P (not shown) is passed through the passage 8B, the first heat exchanger 6, the passage 8C and the second heat exchanger ( 7) It is transferred to the solution tube 31 via the passage 8D and the float valve 35, and is heated by the combustor 30 while passing through the solution tube 31. As shown in FIG. The heated lithium bromide solution flows into the gas-liquid separator 32 and is separated into the lithium bromide solution and the refrigerant vapor. Meanwhile, a part of the lithium bromide solution heated by the solution tube 31 passes through the bypass tube 33. Flows to 34. The lithium bromide aqueous solution separated by the gas-liquid separator 32 flows into the float chamber 34 through the connecting pipe 36 and flows into the float chamber 34 from the bypass pipe 33 in the float chamber 34 in the float chamber 34. Joined with an aqueous solution, the passage 9A, the second heat exchanger 7, the passage 9B, the first heat exchanger 6 (not shown), the passage 9D (not shown) and the spray header 18 Return to the absorber 5 (not shown) via (not shown).

Except for the above, it is the same as that of each embodiment mentioned above.

Claims (9)

A first generator 1 having a heating source, a second generator 2 having a refrigerant steam generated by the first generator 1 as a heating source, and a refrigerant liquid generated by the first and second generators. And a condenser (3) for cooling the refrigerant vapor, a cold / hot water heat exchanger (4) for selectively generating cold water and hot water, and an absorber (5) for absorbing the refrigerant vapor in an aqueous solution to produce an aqueous solution with a large amount of refrigerant mixed therein. And a coolant liquid including a solution pump means 8P for transferring the aqueous solution of the absorber 5 to the generators, and a coolant pump 12A for spraying the coolant liquid in the cold / hot water heat exchanger 4. An absorption cold / hot water machine comprising a circulation device (12), heat exchangers (6) and (7) for heat-exchanging an aqueous solution transferred from said absorber (5) to said generator and an aqueous solution flowing from said generator to said absorber, wherein said Generators on at least one of the first and second generators By the main refrigerant vapor passage 11 leading to the refrigerant steam generated by the cold water / hot water heat exchanger (4), the main refrigerant vapor passage 11 is a U seal portion 11A curved in a U-shape in the middle And a sealant supply pipe connecting the U seal portion 11A and the outlet side of the refrigerant pump 12A, and the refrigerant pump 12A stops when the heater is operated. 11A) stops the supply of the refrigerant liquid, thereby allowing the refrigerant vapor to pass through the main refrigerant vapor passage (11), and during the quenching operation, the refrigerant pump (12A) is operated to the U seal portion (11A). Absorption cold water heater, characterized in that the refrigerant vapor is supplied so that the refrigerant vapor can not pass through the main refrigerant vapor passage (11). The cold water heater according to claim 1, wherein one end of the main refrigerant vapor passage (11) is connected to the condenser (3) and the other end to a cold water / hot water heat exchanger (4). The cold water heater according to claim 1, wherein one end of the main refrigerant vapor passage (11) is connected to the first generator (1) and the other end to the cold water / hot water heat exchanger (4). 3. The refrigerant liquid blow device (14) according to claim 2, further comprising a refrigerant liquid blow device (14) coupled to an outlet side of the refrigerant pump (12A) of the refrigerant liquid circulation device (12). There is a blow pipe (14A) that is open to the opening, and on the blow pipe (14A) is provided with an on-off valve (14B) is installed so that it is open when operating the heater, closed in the quench operation, characterized in that the absorption type Cold water heater. 3. A nutrient solution pipe for pumping refrigerant liquid to the absorber, a conduit for connecting the lower end of the nutrient solution pipe and the cold water / hot water heat exchanger, and one end of which is connected to the condenser and the other end is opened at the lower end of the nutrient solution pipe. And an auxiliary refrigerant steam pipe having a U seal part on the way, and a conduit connecting the seal part of the auxiliary refrigerant increase engine and the seal liquid supply pipe. 3. A nutrient solution pipe connected to the absorber, a conduit connecting the lower end of the nutrient solution pipe and the cold / hot water heat exchanger, and one end connected to a heating tube of the second generator, and the other end of the nutrient solution pipe connected to the absorber. And an on / off valve disposed in the middle of the auxiliary refrigerant increasing steam pipe, the valve opening and closing valve being closed during the quenching operation and opening during the operation of the heater. 6. The main refrigerant vapor passage according to claim 5, wherein the main refrigerant vapor passage includes two U seals, and the inlet of the auxiliary refrigerant vapor passage is connected between the first U seal portion in the main refrigerant vapor passage and the second U seal portion. Absorption cold water heater. 2. A nutrient solution pipe connected to the absorber, and a conduit connecting the lower end of the nutrient solution pipe and the cold water / hot water heat exchanger, wherein the outlet of the main refrigerant vapor passage is open at the lower end of the nutrient solution pipe. Absorption cold water heater. 8. The absorption cold / hot water heater according to claim 7, further comprising a gas-liquid separator coupled to an upper portion of the nutrient solution tube.

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