JP2000097512A - Method for increasing heating capacity of absorption- water cooled/warmer and increasing load absorption water cooler/warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the pressure of refrigerant steam in a high-temperature regenerator to atmospheric pressure or less by bypassing the refrigerant steam from the drain chamber of the low-temperature regenerator to an evaporator using a bypass pipeline with a gate valve. SOLUTION: A bypass pipeline 31 with a gate valve 32 as a valve means for closing down is provided between a drain chamber 2d of a low-temperature regenerator 2 and an evaporator 4. Refrigerant steam is bypassed from the drain chamber 2d to the evaporator 4 by the bypass pipeline 31, thus reducing the amount of generated refrigerant liquid in the low-temperature regenerator 2, hence suppressing the increase in refrigerant steam pressure in a high- temperature regenerator 1, and maintaining atmospheric pressure or less in heating increase operation for throwing an amount of heat that is at a rated value or higher in cooling operation for the high-temperature regenerator 1, without interrupting a function that is peculiar to an absorption water cooler/ warmer with a U-shaped sealing pipe 11 and a bubble pump 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type chiller / heater used in an air conditioner and the like. The present invention relates to an absorption type chiller / heater.

[0002]

2. Description of the Related Art In general, an absorption type chiller / heater is configured to supply chilled water to an absorber while supplying heat to a regenerator to supply energy, thereby generating chilled water for use in cooling.
Hot water can be generated and used for heating.
As a method for removing hot water, (a) refrigerant vapor generated in a regenerator is introduced into an evaporator or an absorber through a valve,
There is also a method in which the flowing water is heated by exchanging heat with the water flowing in the evaporator tube group and hot water is taken out (for example, Japanese Patent Application Laid-Open No. 58-9 / 1983).
6963), (b) There is also a method in which a steam pipe of a regenerator is branched and introduced into a separately provided hot water heat exchanger, and the hot water is heated by the hot water heat exchanger to take out hot water. (Japanese Patent Laid-Open No. 49-78251), (c) The solution concentration of the regenerator during heating is extremely reduced to suppress the rise in boiling point, and refrigerant vapor generated in the regenerator is directly introduced into the condenser.
Alternatively, there is also a method in which the water is introduced through a low-temperature regenerator and the water in the condenser tube group is heat-exchanged to take out hot water (for example, JP-A-57-136066). However, the method (a) requires a large-diameter and highly durable switching valve, which increases the equipment cost, and the method (b) requires a separate heat exchanger. Therefore, not only is the equipment cost expensive, but the installation space is large,
According to the method (c), the pipe connection of the load must be switched between the time of the cooling operation and the time of the heating operation, so that the switching operation between the cooling and the heating is complicated.

[0003] As the latest technology for preventing the drawbacks of the above-mentioned methods, an absorption type chiller / heater using a U-shaped seal tube (Japanese Patent Publication No. 414262/1992) and an absorption type chiller / heater using a bubble pump are known. A machine (Japanese Patent Publication No. 4-29951) is known. FIG. 4 is a cycle flow diagram schematically illustrating an example of an absorption type water heater provided with a U-shaped sealing pipe. This is a name based on the function of. Reference numeral 1 denotes a high-temperature regenerator, 2 denotes a low-temperature regenerator, 3 denotes a condenser, 4 denotes an evaporator, 5 denotes an absorber, 6 denotes a low-temperature heat exchanger,
7 is a high-temperature heat exchanger, 8 is a solution circulation pump, and 9 is a refrigerant spray pump. The bottom of the condenser 3 where the liquefied refrigerant liquid accumulates is connected to the evaporator 4 by the refrigerant liquid conduit 10 provided with the throttle 19 and is connected to the gas phase part (the above space) of the condenser 3. The evaporator 4 is connected to the evaporator 4 by a U-shaped seal tube 11. Reference numeral 12 denotes a refrigerant spray conduit for guiding the refrigerant liquid discharged from the refrigerant spray pump 9 to the spray header 22, and a float valve 13 is inserted and connected in the middle thereof. 14 is a refrigerant tank of the evaporator, 15 is a branch pipe which branches from the refrigerant spray pipe 12 and guides a low-temperature refrigerant liquid to the U-shaped seal pipe 11, and 16 absorbs a part of the refrigerant liquid discharged from the refrigerant spray pump 9. A refrigerant blow pipe 17 for discharging the refrigerant to the vessel 5 is a refrigerant blow valve for controlling the discharge of the refrigerant liquid.

[0004] The operation of the absorption chiller / heater of FIG. 4 configured as described above is divided into a cooling operation and a heating operation. The following describes the operation. When the cooling operation is performed, the blow valve 17 is closed. It operates while sending the refrigerant liquid into the U-shaped seal tube 11. The refrigerant vapor generated in the high-temperature regenerator 1 is guided into the heat transfer tube 2a of the low-temperature regenerator 2, and the solution flowing down the outer peripheral surface of the heat transfer tube 2a undergoes heat exchange to be condensed and liquefied. Flows into. Refrigerant vapor generated by heat exchange in the low-temperature regenerator 2 flows into the condenser 3 through the mist separator 21, and is cooled and condensed and liquefied by the cooling water 3a flowing through the heat transfer tube group. The refrigerant liquid flowing into the condenser 3 as described above is supplied to the refrigerant liquid conduit 10 by the refrigerant liquid conduit 10.
It is guided to the evaporator 4 through the throttle 19. The refrigerant liquid flowing into the evaporator 4 is sucked and pumped by the refrigerant spray pump 9, ejects from the spray header 22, rains, evaporates by exchanging heat with the cold water 4a flowing through the tube group, and evaporates from the cold water 4a. The refrigeration effect is obtained by removing latent heat.
a represents hot water when the heating operation is performed, as described later). The refrigerant vapor generated by evaporation flows into the absorber 5 through the mist separator 20, and the absorption liquid cooled by the cooling water 5a (a solution diluted by evaporating a part of the refrigerant in the regenerator). ) And is restored to the same solution as before evaporation. The reconstituted solution is sucked into the solution circulation pump 8 and sent under pressure, and a part is sent to the low-temperature regenerator 2.
The remainder is sent to the high-temperature regenerator 1 via the low-temperature heat exchanger 6 and the high-temperature heat exchanger 7.

In order to perform the above-described cooling cycle, it is necessary to prevent the refrigerant vapor in the condenser 3 from flowing through the U-shaped seal tube 11 to the evaporator 4.
The seal tube 11 is filled with a refrigerant liquid and sealed. However, when the refrigerant is simply filled with the refrigerant liquid, a part of the refrigerant vapor in the condenser 3 comes into contact with the refrigerant liquid in the U-shaped sealing pipe 11 and condenses and liquefies on the liquid surface, thereby releasing latent heat of liquefaction to form a U-shaped liquid. Seal tube 11
The temperature of the refrigerant liquid inside is raised. For this reason, there is a possibility that the refrigerant liquid may reboil on the side of the evaporator 4 and lose the sealing function. In the example of FIG. 4, a part of the refrigerant liquid discharged from the refrigerant spray pump 9 is pressure-fed to the vicinity of the bottom of the U-shaped seal pipe 11 via the branch pipe 15, so that the pressure difference due to the liquid column head does not occur again. The maintenance function can be maintained, and the refrigerant cycle in the condenser 3 does not flow to the evaporator 4 through the U-shaped seal pipe, and the cooling cycle described above with reference to FIG. 4 can be performed. .

Next, the heating operation of the absorption type chiller / heater with a U-shaped seal tube illustrated in FIG. 4 will be described.
The supply of the cooling water 3a and the cooling water 5a of the absorber 5 is stopped, and the refrigerant blow valve 17 is opened to operate. Then, when the refrigerant spray pump discharges the refrigerant liquid stored in the bottom of the refrigerant tank 14, the discharged refrigerant liquid is discharged to the absorber 5 through the refrigerant blow pipe 16 and the refrigerant blow valve 17, and is discharged to the absorber 5. Increase the refrigerant concentration in the absorbing solution inside. On the other hand, the refrigerant liquid does not reach the branch pipe 15 branched from a position higher than the refrigerant blow pipe 16 and the refrigerant blow valve 17, and the refrigerant liquid is not supplied to the U-shaped seal pipe 11. The refrigerant vapor generated in the high-temperature regenerator 1 is guided into the heat transfer tube 2a of the low-temperature regenerator, exchanges heat with the solution flowing down while contacting the outer peripheral surface of the heat transfer tube 2a, and is cooled and condensed and liquefied. , And flows into the condenser 3. Low temperature regenerator 2
The refrigerant vapor generated in the above is guided to the condenser 3 through the mist separator 21, and the cooling water 3
a is not condensed and liquefied because water is not passed through,
Into the U-shaped seal tube 11. If the pipe height of the U-shaped seal pipe on the side of the evaporator 4 is appropriately set (for example, about 1 meter or less), the pressure of the refrigerant vapor in the condenser 3 causes the U-shaped seal pipe 11 The function of maintaining the pressure difference by the liquid column head formed in the evaporator 4 is destroyed, and the refrigerant vapor blows through the U-shaped seal tube 11 and flows into the evaporator 4. The refrigerant vapor that has flowed into the evaporator 4 contacts the surface of the heat transfer tube group of the evaporator 4 and condenses, giving condensing latent heat to the warm water 4a flowing through the tube group and heating it to exhibit a heating effect. I do.

FIG. 5 is a cycle flow diagram showing an example of a known absorption chiller / heater equipped with a bubble pump. However, since the understanding of the structural function is drawn as a schematic for convenience, it differs from the actual diagram, and the names of the added components are names based on the function when the absorption type chiller / heater is operated for cooling. It is. In FIG. 5, components having the same reference numerals and names as those in FIG. 4 described above are the same or similar to those of the absorption-type water heater / heater (FIG. 4) of the U-shaped sealed tube system, and therefore the description thereof is omitted. Then, the components different from those in FIG. 4 are extracted and the outline will be described. The U-shaped seal tube 11 ′ is similar to the U-shaped seal tube 11 described above, The character seal 11 ′ is not directly connected to and connected to the evaporator 4 on the side of the evaporator 4, but sequentially through a refrigerant vapor conduit 26, a bubble pump 30, a gas-liquid separator 25, and a refrigerant vapor conduit 28. A gas vent hole b is provided at the connection between the U-shaped seal pipe 11 'and the refrigerant vapor conduit 26, which is connected to the evaporator 4. The bubble pump 30 is configured to pump the refrigerant liquid accumulated at the bottom of the evaporator 4 using the refrigerant vapor flowing through the U-shaped seal tube 11 'as a driving source. The pumped foam mixture flows into the gas-liquid separator 25, the separated gas component is guided to the evaporator 4 by the refrigerant vapor conduit 28, and the separated liquid component flows into the absorber 5. It has become.

[0008] The cooling operation and the heating operation of the absorption type chiller / heater with the bubble pump configured as described above will be described. The operation at the time of cooling is similar to that of the known example of FIG. In the case of the heating operation, the refrigerant spray pump 9 is stopped to operate the absorption type chiller / heater. As a result, the liquid seal of the U-shaped seal tube 11 'is broken, and a part of the refrigerant vapor flows into the evaporator 4 from the gas vent hole b through the refrigerant vapor conduit 28, while the other vapor bubbles pass through the refrigerant vapor conduit 26. It flows into the pump 30. The refrigerant vapor flowing into the bubble pump 30 forms a two-phase flow of the refrigerant liquid from the evaporator 4 via the refrigerant liquid conduit 27, pumps it up, and guides it into the gas-liquid separator 25. The refrigerant gas separated in the gas-liquid separator 25 merges with the refrigerant vapor passing through the gas vent hole b and flows into the evaporator 4 through the refrigerant vapor conduit 28. And
The refrigerant liquid separated by the gas-liquid separator 25 flows into the absorber 5. The refrigerant liquid flowing into the absorber 5 is mixed with the solution in the absorber 5 to reduce the concentration of the cycle circulation solution. Therefore, even if the evaporation pressure in the low-temperature regenerator 2 increases during heating, the boiling point can be kept at 100 ° C. or less,
The pressure in the high-temperature regenerator 1 does not exceed the atmospheric pressure. Refrigerant vapor generated in the low-temperature regenerator 2 flows to the evaporator 4 through the U-shaped seal pipe 11 ', the refrigerant vapor conduit 26, the bubble pump 30, the gas-liquid separator 25, and the refrigerant vapor conduit 28 in order, In the evaporator 4, the "hot water 4 flowing through the evaporator tube group"
a) and condenses to generate latent heat of condensation. This condensation latent heat heats the hot water 4a, thereby providing a heating effect.

[0009]

The absorption chiller / heater equipped with a U-shaped seal tube illustrated in FIG. 4 and the absorption chiller / heater equipped with a bubble pump illustrated in FIG. It is an excellent invention that has achieved the objectives of the present invention, and can be applied alone or in combination, and has greatly contributed to the technological progress of the absorption-type chiller / heater.
The present invention is not intended to eliminate the disadvantages of the known invention, but to further increase the practical value by adding a heating increasing function. Next, the heating increasing function in the absorption chiller / heater will be briefly described (see FIG. 4). The basic structural function of the absorption chiller / heater is, as described in [Prior Art], a high temperature regenerator. The cooling operation and the heating operation can be arbitrarily performed by applying heat to the air conditioner.
As the means for applying heat, a high-temperature gas obtained by burning fuel may be introduced into the heat generating portion h of the high-temperature regenerator 1 or Joule heat by electric power may be supplied. When the amount of heat given to the heat generating portion h is set to a rated value, rated cooling and heating capabilities can be obtained.
When the above-mentioned heat quantity is reduced and the partial load operation is performed, the cooling and heating capacity decreases substantially in proportion to the heat quantity. There is room for consideration here in comparison between cooling operation and heating operation.
The problem is whether to make the rated value of the amount of heat given to the high-temperature regenerator the same or to make a difference in the rated value. Considering only from the viewpoints of simplifying the configuration of the absorption type water heater and cooling system, facilitating design and manufacture and facilitating operation, the rated value of the amount of heat given to the high-temperature regenerator is the same in summer and winter. Is desirable. However, the impact on the practical value of the absorption chiller / heater must be given priority. In summary, in the warm regions of Japan in the Kanto region and the west of the Tokai region, if the heat input during cooling (meaning the rated value unless otherwise specified) and the heat input during heating are set to the same level. In general, user satisfaction can be obtained in both summer and winter. On the other hand, in cold regions such as Tohoku and Hokkaido, where the rated heat value during cooling operation and the rated heat value during heating operation are set to the same value, the heating capacity tends to be insufficient in winter. Become.

In response to this situation, an absorption-type water heater / heater having an input heat quantity equal to the cooling operation during the heating operation is standardized, and a heating increase type in which the heating input is set to a larger input heat quantity than during the cooling operation. Are supplied as specifications for cold regions. in this case,
From an industrial production standpoint, the compatibility of components and components between a heating standard absorption chiller / heater for warm climates and an increased heating absorption chiller / heater for cold climates is desirable Is to be as large as possible. For example, temporarily
Absorption type chiller / heater for warm regions and absorption type chiller / heater for cold regions consist of exactly the same components,
It is most desirable if the specifications of the destination can be met only by adjusting the control system. Even if that is not possible, the standard heating type absorption chiller / heater can be remodeled into an increased heating type absorption chiller / heater by installing several pipe members and valves. Is desirable. As will be understood from the above description, "remodeling" in the present invention is in a broad sense, and a heating standard type absorption chiller / heater once completed as a product is processed to become an increased heating type absorption chiller / heater. Not limited to this, it is also possible to install additional parts in the middle of the production line for semi-finished heating standard type chiller / heater before it was completed as a product to complete it as an increased heating type absorption chiller / heater. It is included in "remodeling" in the invention.

Next, a technical problem in the case of modifying each of the absorption chiller / heater shown in FIGS. 4 and 5 to increase the heating will be described. FIGS. 4 and 5 are only detailed. On the contrary, since the problem is difficult to understand, a description will be given with reference to FIGS. FIG. 6 schematically illustrates an absorption type chiller / heater equipped with a U-shaped seal tube and a bubble pump according to the latest known technology, in which a flow direction of a gas component in a heating standard time is indicated by a thick arrow and a flow direction of a liquid component is indicated. It is a flow-pressure balance explanatory diagram represented by a thin arrow, and a flow rate value in a heating standard time is enclosed by a rectangular frame, and a pressure value is enclosed by an oval frame. In the standard heating operation shown in FIG. 6, the flow rate of the refrigerant vapor generated from the high-temperature regenerator (abbreviated symbol HG) 1 is 88.5 kg / h, and this refrigerant vapor is condensed with the low-temperature regenerator (abbreviated symbol LG) 2 After passing through an evaporator (abbreviated symbol C) 3, a refrigerant liquid and a refrigerant vapor of 88.5 kg / h are sent to an evaporator (abbreviated symbol E) 4. In the evaporator 4, the refrigerant liquid becomes a refrigerant liquid, and a total of 177 kg /
The refrigerant liquid of h is sent to the absorber (abbreviation A) 5 by the bubble pump 30. At this time, the refrigerant vapor pressure in the high-pressure regenerator 1 is 538 mmHg (abs), and the operation is performed in a negative pressure state compared to the atmospheric pressure. FIG. 7 is an explanatory diagram of a flow-pressure balance in a case where the amount of heat given to the high-temperature regenerator of the absorption chiller / heater shown in FIG. The name is a name based on the function in a state where the absorption type water heater / cooler is in a cooling operation. In the example of FIG. 7, the amount of heat given to the high-temperature generator 1 is about 1.35 times that of the heating standard (FIG. 6). For this reason, the flow rate of the refrigerant vapor generated from the high-temperature regenerator 1 increases (substantially in proportion) with the amount of heat input, and increases by 120
kg / h. For this reason, the pressure loss in the pipe increases, and the refrigerant vapor pressure in the high-temperature regenerator 1 becomes 874 mm.
Hg, which is a positive pressure compared to the atmospheric pressure.

The flow rate-pressure balance shown in FIG. 7 is based on data obtained experimentally, and the emergency stop device which operates when the internal pressure of the high-temperature regenerator 1 rises abnormally does not operate. Flow rate
Pressure data could be obtained. However, in the case of a practical machine, an abnormally high pressure (above atmospheric pressure) of the high-temperature regenerator is detected, the safety device operates, and the operation cannot be continued. The reason why the positive pressure inside the high-temperature regenerator 1 is contraindicated is that when the internal pressure of the high-temperature regenerator becomes a positive pressure, legal regulations as a pressure vessel are applied, resulting in unavoidable cost increases or large This is because the weight increases. The present invention has been made in view of the above circumstances, and has no adverse effect on the basic performance of a standard heating-type absorption chiller / heater, and has the shape, dimensions, and weight of the absorption-type absorption chiller / heater. It is an object of the present invention to provide a method of remodeling so that the heating operation can be increased by a simple operation without significantly increasing the manufacturing cost, and an absorption heating water heater / heater of an increased heating type.

[0013]

The basic principle of the present invention configured to achieve the above object will be briefly described below with reference to FIG. 1 corresponding to one embodiment.

FIG. 1 shows the balance between the flow rate and the pressure in the heating increasing operation state in which the amount of heat applied to the high-temperature regenerator 1 is increased. Increase heat quantity and flow rate 120k
When g / h of refrigerant vapor was generated, the inside of the high-temperature regenerator 1 became a positive pressure compared to the atmospheric pressure. In order to make the refrigerant vapor pressure in the high-temperature regenerator 1 equal to or lower than the atmospheric pressure during the heating-increase operation by adding a simple modification to such an absorption-type water heater / heater, the evaporator 4 is removed from the drain chamber 2a of the low-temperature regenerator 2. The refrigerant vapor is bypassed by a bypass pipe 31 provided with a gate valve 32. As a result, the pressure of the refrigerant vapor in the high-temperature regenerator 1 is kept at or below the atmospheric pressure (557 mmHg in this example).

[0015] Based on the principle described above, the method according to the first aspect of the present invention comprises a high-temperature regenerator, a low-temperature regenerator,
A condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, a refrigerant spray pump, and a gas phase part of the condenser and an evaporator via a U-shaped seal tube. When connecting and branching a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe to operate an absorption chiller / heater to perform a heating operation, the absorption chiller / heater is connected to the absorption chiller / heater. In the method of increasing the amount of heat given to the high-temperature regenerator and increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator to increase the heating capacity as compared with the case of performing the cooling operation, the evaporation from the drain chamber of the low-temperature regenerator is performed. By reducing the amount of refrigerant liquid generated in the low-temperature regenerator by bypassing the refrigerant vapor in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser can be reduced by the "unit time for applying to the high-temperature regenerator during the heating operation. Heat per hit Reduce the pressure inside the high-temperature regenerator to below atmospheric pressure by reducing it to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in the "heating standard condition that does not increase compared to cooling operation". While maintaining, the amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and the heating increase operation is performed by increasing the refrigerant vapor flow rate generated from the high-temperature regenerator while preventing abnormal pressure rise in the high-temperature regenerator. It is characterized by doing. According to the method of the first aspect of the present invention described above, a valve for switching piping and opening / closing a flow path in a cycle flow system, which is an advantage of an absorption chiller / heater equipped with a U-shaped sealing pipe, is installed. Without losing the effect of `` being able to switch between cooling operation and heating operation '' without losing the effect of `` bypassing the refrigerant vapor from the low-temperature regenerator to the evaporator '' with the low-temperature regenerator drain chamber. The pressure loss to and from the condenser can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption type water heater / cooler is determined by the hydrodynamic and thermodynamic balances, applying this claim does not necessarily increase the heating capacity without limit, According to experiments by the inventors, when the specification of the heating standard is set for Central Japan to West Japan,
When the invention of this claim is applied in response to the increase in the refrigerant vapor flow rate generated by the high-temperature regenerator due to the increase in heating in the cold district specifications for Hokkaido, the refrigerant vapor pressure in the high-temperature regenerator is maintained at a negative pressure compared to the atmospheric pressure It was confirmed that it would be obtained at least.

According to a second aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. And the gas phase part of the condenser and the evaporator are U
When the heating and cooling operation is performed by operating an absorption type chiller / heater configured by connecting the branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe while connecting through the U-shaped seal pipe, The amount of heat given to the high-temperature regenerator is increased compared to the case where the absorption-type water heater is used for cooling operation.
In the method of increasing the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the condenser to reduce the amount of heat exchange in the low-temperature regenerator. By reducing the amount of refrigerant liquid generated in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser can be reduced by comparing the amount of heat per unit time given to the high-temperature regenerator in the heating operation with the heat loss in the cooling operation. In the heating standard condition that cannot be increased by reducing the pressure loss between the low-temperature regenerator drain chamber and the condenser to almost the same level, while maintaining the pressure in the high-temperature regenerator below atmospheric pressure, The amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and the heating increase operation is performed by increasing the flow rate of the refrigerant vapor generated from the high-pressure regenerator while preventing abnormal pressure rise in the high-temperature regenerator. To. Claim 2 described above
According to the method of the invention, the advantage of the absorption type chiller / heater equipped with a U-shaped seal pipe is that "cooling is performed without switching piping for the cycle flow system or installing valves for opening and closing the flow path. The pressure between the low-temperature regenerator drain chamber and the condenser can be reduced by a simple operation of "bypassing the refrigerant vapor from the low-temperature regenerator to the condenser" without impairing the effect that "the operation and the heating operation can be switched." Loss can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption type water heater / cooler is determined by the hydrodynamic and thermodynamic balance,
When applying this claim, it is not always possible to increase the heating capacity indefinitely, but by experiments of the present inventors, if the specification of the heating standard is set for Central Japan-West Japan, cold district specifications for Hokkaido It has been confirmed that applying the present invention in response to an increase in the flow rate of the refrigerant vapor generated by the high-temperature regenerator due to an increase in heating of the refrigerant makes it possible to maintain the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure compared to the atmospheric pressure. Was done.

According to a third aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. And the vapor phase part of the condenser and the evaporator are U
Connected via a U-shaped seal pipe, and when operating an absorption type cold water heater configured by connecting a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe to perform a heating operation, The amount of heat given to the high-temperature regenerator is increased compared to the case where the absorption-type water heater is used for cooling operation.
In the method of increasing the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the refrigerant liquid is returned from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator and sent to the condenser. The pressure loss between the cold regenerator drain chamber and the condenser is reduced by reducing the flow rate of
Approximately the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in "the heating standard state where the amount of heat given to the high-temperature regenerator during the heating operation per unit time cannot be increased compared to the cooling operation" While maintaining the pressure in the high-temperature regenerator below the atmospheric pressure, increasing the amount of heat given to the high-temperature regenerator from the rated value in the cooling operation state, and preventing the abnormal high pressure in the high-temperature regenerator while maintaining the high-temperature regenerator. A heating increase operation is performed by increasing the flow rate of refrigerant vapor generated from the regenerator. According to the above-described method of the third aspect of the present invention, the advantage of the absorption type water chiller / heater equipped with the U-shaped sealing pipe is that "the valves for switching the piping and opening / closing the flow path in the cycle flow system are installed. Without doing
The cooling operation can be switched between the cooling operation and the heating operation '' without compromising the effect of `` recirculating the refrigerant liquid from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator '' by a simple operation of The pressure loss to and from the condenser can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the hydrodynamic and thermodynamic balance,
When applying this claim, it is not always possible to increase the heating capacity indefinitely, but by experiments of the present inventors, if the specification of the heating standard is set for Central Japan-West Japan, cold district specifications for Hokkaido It has been confirmed that applying the present invention in response to an increase in the flow rate of the refrigerant vapor generated by the high-temperature regenerator due to an increase in heating of the refrigerant makes it possible to maintain the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure compared to the atmospheric pressure. Was done.

According to a fourth aspect of the present invention, the high-temperature regenerator, the low-temperature regenerator, the condenser, the evaporator, the absorber, the heat exchanger, the solution circulation pump, and the refrigerant spray pump are provided. Heating by operating an absorption type chiller / heater provided with a “bubble pump driven by refrigerant vapor as a driving source” that pumps a refrigerant liquid accumulated at the bottom of the evaporator and guides the refrigerant to the absorber When performing the operation, the amount of heat given to the high-temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased as compared with the case where the absorption type chiller / heater is operated for cooling, thereby increasing the heating capacity. In an increasing method, the pressure between the cold regenerator drain chamber and the condenser is reduced by bypassing refrigerant vapor from the drain chamber of the low temperature regenerator to the evaporator to reduce the amount of refrigerant liquid generated in the low temperature regenerator. Loss is "high temperature regeneration during heating operation The amount of heat per unit time given to the heating unit is reduced to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in the "heating standard condition that does not increase compared to the cooling operation". While maintaining the internal pressure at or below atmospheric pressure, the amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and refrigerant vapor generated from the high-temperature regenerator while preventing abnormal pressure rise in the high-temperature regenerator It is characterized in that a heating increase operation is performed by increasing a flow rate. According to the method of the fourth aspect described above, the "cycle flow system" which is an advantage of the absorption type chiller / heater of the type in which the refrigerant liquid at the bottom of the evaporator is pumped by the bubble pump driven by the refrigerant vapor. It is possible to switch between cooling operation and heating operation without switching piping or installing valves for opening and closing the flow path.
The pressure loss between the drain chamber of the low-temperature regenerator and the condenser can be reduced by a simple operation of bypassing the refrigerant vapor from the low-temperature regenerator to the evaporator. When considered on the basis of the regenerator, the refrigerant vapor pressure in the low-temperature regenerator decreases, and therefore the refrigerant vapor pressure in the high-temperature regenerator decreases.
Even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the increase in the internal pressure of the high-temperature regenerator is suppressed by the reduced pressure loss. can do. Since the distribution of flow rate and pressure in the cycle flow of the absorption type water heater / cooler is determined by the hydrodynamic and thermodynamic balances, applying this claim does not necessarily increase the heating capacity without limit, According to the experiments of the present inventors, when the specification of the heating standard is set for central Japan to western Japan, the invention of the present invention corresponds to the increase in the flow rate of the high-temperature regenerator-generated refrigerant vapor due to the increase in heating of the cold district specification for Hokkaido. Apply
It has been confirmed that the refrigerant vapor pressure in the high-temperature regenerator can be maintained at a negative pressure compared to the atmospheric pressure.

The method according to the fifth aspect of the present invention comprises a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. Heating by operating an absorption type chiller / heater provided with a “bubble pump driven by refrigerant vapor as a driving source” that pumps a refrigerant liquid accumulated at the bottom of the evaporator and guides the refrigerant to the absorber When performing the operation, the amount of heat given to the high-temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased as compared with the case where the absorption type chiller / heater is operated for cooling, thereby increasing the heating capacity. In the increasing method, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the condenser to reduce the amount of heat exchange in the low-temperature regenerator and to reduce the amount of refrigerant liquid generated in the low-temperature regenerator, thereby enabling low-temperature regeneration. Pressure between the drain chamber and the condenser The loss is almost the same as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in "the heating standard state where the amount of heat per unit time given to the high-temperature regenerator during the heating operation is not increased compared to the cooling operation". While keeping the pressure inside the high-temperature regenerator below the atmospheric pressure while increasing the amount of heat given to the high-temperature regenerator above the rated value in the cooling operation state, preventing abnormal pressure rise in the high-temperature regenerator A heating increase operation is performed by increasing a refrigerant vapor flow rate generated from the high-temperature regenerator. According to the method of the invention described in claim 5 described above, the advantage of the absorption-type water heater / heater equipped with the bubble pump is that "switching of piping and installation of valves for opening and closing the flow path in the cycle flow system" Without losing the effect of being able to switch between the cooling operation and the heating operation without performing `` cooling operation and heating operation '', by a simple operation of `` bypassing refrigerant vapor from the low-temperature regenerator to the condenser '' and the low-temperature regenerator drain chamber and condenser And the pressure loss between them can be reduced. This allows
Considering the condenser as a reference, the refrigerant vapor pressure in the low-temperature regenerator decreases, and thus the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the hydrodynamic and thermodynamic balances, applying this claim does not necessarily increase the heating capacity indefinitely, According to experiments by the present inventors, when the specification of the heating standard is set for Central Japan to West Japan, the invention of the present invention corresponds to the increase in the flow rate of the high-temperature regenerator-generated refrigerant vapor due to the increase in heating of the cold district specification for Hokkaido. It has been confirmed that the application of the formula allows the refrigerant vapor pressure in the high-temperature regenerator to be maintained at a negative pressure compared to the atmospheric pressure.

According to a sixth aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. Heating by operating an absorption type chiller / heater provided with a “bubble pump driven by refrigerant vapor as a driving source” that pumps a refrigerant liquid accumulated at the bottom of the evaporator and guides the refrigerant to the absorber When performing the operation, the amount of heat given to the high-temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased as compared with the case where the absorption type chiller / heater is operated for cooling, thereby increasing the heating capacity. In the increasing method, the refrigerant liquid is recirculated from the drain chamber of the low-temperature regenerator to the main part of the low-temperature regenerator, and the flow rate of the refrigerant liquid sent to the condenser is reduced, so that the space between the low-temperature regenerator drain chamber and the condenser is reduced. Pressure loss during heating operation The amount of heat given to the regenerator per unit time is reduced to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condensate" in the "heating standard condition that does not increase compared to the cooling operation". While maintaining the pressure in the regenerator below atmospheric pressure, the amount of heat given to the high-temperature regenerator is increased from the rated value during the cooling operation, and is generated from the high-temperature generator while preventing abnormal pressure rise in the high-temperature generator. The heating increase operation is performed by increasing the refrigerant vapor flow rate. According to the invention method of claim 6 described above,
Advantages of absorption type water heaters with bubble pumps: "Switching between cooling operation and heating operation without switching pipes and installing valves for opening and closing the flow path in the cycle flow system. Pressure between the low-temperature regenerator drain chamber and the condenser by a simple operation of `` recirculating the refrigerant liquid from the low-temperature regenerator drain chamber to the main part of the low-temperature regenerator '' without impairing the effect of Loss can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the hydrodynamic and thermodynamic balance,
When applying this claim, it is not always possible to increase the heating capacity indefinitely, but by experiments of the present inventors, if the specification of the heating standard is set for Central Japan-West Japan, cold district specifications for Hokkaido It has been confirmed that applying the present invention in response to an increase in the flow rate of the refrigerant vapor generated by the high-temperature regenerator due to an increase in heating of the refrigerant makes it possible to maintain the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure compared to the atmospheric pressure. Was done.

According to a seventh aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. And the gas phase part of the condenser and the evaporator are U
An absorption chiller / heater connected by a U-shaped seal pipe and connected to a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe. As compared with the case of operating, the heating amount given to the high-temperature regenerator is increased, the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, and the heating capacity is increased to increase the heating capacity. A bypass line provided with a valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the evaporator, and the valve means is opened to allow the refrigerant to flow from the low-temperature regenerator to the evaporator. By opening the valve means, the pressure loss between the low temperature regenerator drain chamber and the condenser is reduced, and the amount of heat given to the high temperature regenerator is increased. From high temperature regenerator Rise of the refrigerant vapor pressure in said high temperature regenerator increases the flow rate of the refrigerant vapor is suppressed, characterized in that it is a structure that is maintained at or below atmospheric pressure. According to the above-described apparatus of the present invention, since the bypass pipe having the closable valve means is provided between the drain chamber of the low-temperature regenerator and the evaporator, the valve means is provided during the cooling operation. By opening the valve means during the heating operation, the heating operation can be increased while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure.

[0022] The structure of the apparatus according to claim 8 is that a high temperature regenerator, a low temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. And the gas phase part of the condenser and the evaporator are U
An absorption chiller / heater connected by a U-shaped seal pipe and connected to a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe. As compared with the case of operating, the heating amount given to the high-temperature regenerator is increased, the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, and the heating capacity is increased to increase the heating capacity. In the apparatus, a bypass line having a valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the condenser, and the valve means is opened to open the refrigerant from the low-temperature regenerator to the condenser. By opening the valve means, the pressure loss between the low temperature regenerator drain chamber and the condenser is reduced, and the amount of heat given to the high temperature regenerator is increased. From high temperature regenerator Rise of the refrigerant vapor pressure in said high temperature regenerator increases the flow rate of the refrigerant vapor is suppressed, characterized in that it is a structure that is maintained at or below atmospheric pressure. According to the apparatus of the eighth aspect described above, the bypass pipe having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the condenser. By opening the valve means during the heating operation, the heating operation can be increased while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure.

According to a ninth aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. And the vapor phase part of the condenser and the evaporator are U
An absorption chiller / heater connected by a U-shaped seal pipe and connected to a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe. As compared with the case of operating, the heating amount given to the high-temperature regenerator is increased, the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, and the heating capacity is increased to increase the heating capacity. In the machine, between the drain chamber of the low-temperature regenerator and the main body of the low-temperature regenerator,
A return line provided with a closable valve means is provided so that the valve means can be opened to allow the refrigerant liquid to flow back from the drain chamber of the low-temperature regenerator to the main body. To reduce the pressure loss between the low-temperature regenerator drain chamber and the condenser, increase the amount of heat applied to the high-temperature regenerator and increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator. The structure is characterized in that a rise in refrigerant vapor pressure in the high-temperature regenerator is suppressed and the pressure is maintained at or below the atmospheric pressure. According to the apparatus of the ninth aspect described above, the return pipe having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the main body. By opening the valve means during the heating operation, the heating operation can be increased while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure.

According to a tenth aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. An absorption type chiller / heater provided with a `` bubble pump driven by refrigerant vapor as a driving source '' for pumping a refrigerant liquid accumulated at the bottom of the evaporator and guiding the refrigerant to an absorber. Compared to the case where the absorption type chiller / heater is operated for cooling, the amount of heat given to the high temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high temperature regenerator is increased to increase the heating capacity. In the heating-increase type absorption chiller / heater, a bypass pipe having valve means that can be closed is provided between a drain chamber and an evaporator of the low-temperature regenerator,
By opening the above valve means, refrigerant vapor can be bypassed from the low temperature regenerator to the evaporator, and by opening the above valve means, pressure loss between the low temperature regenerator drain chamber and the condenser is reduced. Even if the amount of heat given to the high-temperature regenerator is increased and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, the increase in the refrigerant vapor pressure in the high-temperature regenerator is suppressed, and the pressure becomes lower than the atmospheric pressure. It is a structure that is maintained. According to the apparatus of the tenth aspect described above, since the bypass pipe having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the evaporator,
By closing this valve means during the cooling operation and opening this valve means during the heating operation, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure. .

An eleventh aspect of the present invention is directed to a device comprising a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption type chiller / heater provided with a `` bubble pump driven by refrigerant vapor as a driving source '' for pumping a refrigerant liquid accumulated at the bottom of the evaporator and guiding the refrigerant to an absorber. Compared to the case where the absorption type chiller / heater is operated for cooling, the amount of heat given to the high temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high temperature regenerator is increased to increase the heating capacity. In the heating-increase type absorption chiller / heater, a bypass pipe provided with a closable valve means is provided between a drain chamber of the low-temperature regenerator and a condenser,
By opening the above valve means, refrigerant vapor can be bypassed from the low temperature regenerator to the condenser, and by opening the above valve means, the pressure loss between the low temperature regenerator drain chamber and the condenser is reduced. Even if the amount of heat given to the high-temperature regenerator is increased and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, the increase in the refrigerant vapor pressure in the high-temperature regenerator is limited, and the pressure becomes lower than the atmospheric pressure. It is a structure that is maintained. According to the apparatus of the eleventh aspect described above, since the bypass conduit having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the condenser,
By closing this valve means during the cooling operation and opening this valve means during the heating operation, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure. .

According to a twelfth aspect of the present invention, a high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump are provided. An absorption type chiller / heater provided with a `` bubble pump using refrigerant vapor as a driving source '' for pumping a refrigerant liquid accumulated at the bottom of the evaporator and guiding the refrigerant to the absorber, Compared to the case where the absorption type chiller / heater is operated for cooling, the amount of heat given to the high-temperature regenerator is increased, and the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased to increase the heating capacity. In the heating-increase type absorption chiller / heater, a return pipe having valve means that can be closed is provided between a drain chamber of the low-temperature regenerator and a main body of the low-temperature regenerator. Open the means to cool the body from the drain chamber of the low-temperature regenerator The liquid can be refluxed, and by opening the valve means, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced, and the amount of heat given to the high-temperature regenerator is increased. Even when the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, the refrigerant vapor pressure in the high-temperature regenerator is suppressed from increasing, and the pressure is maintained at or below the atmospheric pressure. Claim 12 described above.
According to the apparatus of the present invention, since the return line having the closable valve means is provided between the drain chamber of the low-temperature regenerator and the main body, the valve means is closed during the cooling operation and during the heating operation. By opening this valve means, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram schematically showing a cycle flow during an increased heating operation in an embodiment of an increased heating absorption type chiller / heater according to the present invention, in which the flow of gas components is shown. The direction is drawn with a thick arrow and the flow direction of the liquid component is drawn with a thin arrow, and the flow rate value is enclosed in a rectangular frame and the pressure value is enclosed in an oval frame, and the flow rate-pressure balance is indicated. Is represented. This example (FIG. 1) is an improvement obtained by applying the present invention to the known absorption type chiller / heater shown in FIGS. 6 and 7 described above. Pressure and flow rate are added. That is, FIG. 7 is a diagram corresponding to FIG. 7 illustrating a heating increase state in a known example, and components having the same symbols and names as those in FIG. 7 are similar to or similar to the components illustrated in FIG. It is. The low-temperature regenerator drain chamber 2d shown in FIGS. 6, 7 and FIG. 1 is schematically shown for convenience of explanation, and is specifically shown in FIGS.
(Refer to) refers to the internal space of the heat transfer tube provided for flowing the refrigerant vapor in the low-temperature regenerator 2. However, it is difficult and disadvantageous to connect a bypass pipe to the intermediate portion of the heat transfer tube 2a, and therefore, practically, it corresponds to "near the inlet portion of the heat transfer tube 2a with respect to the low-temperature regenerator 2 or near the outlet". I do. A bypass line 31 having a gate valve 32 is provided between the low-temperature regenerator drain chamber 2 d and the evaporator 4. In practicing the present invention, appropriate valve means (not shown) can be used in place of the gate valve 32. However, for example, a valve that can be closed is used instead of a valve that cannot be closed, such as a pressure reducing valve. When the gate valve 32 is opened, no fluid flows in the bypass conduit 31. For this reason, if the gate valve 32 is closed during the cooling operation, the application of the present invention does not affect the absorption type air conditioner of the known example. That is, the U-shaped seal tube 11 and / or
Alternatively, the effect of easy handling operation due to the provision of the bubble pump 30 is not impaired.

In the present embodiment (FIG. 1), the heating increase operation is performed, and the high-temperature regenerator 1 is given a "heat amount larger than the rated heat amount during the cooling operation". As in FIG. 7, 120 kg / h of refrigerant vapor is generated from the high-temperature regenerator 1. In the known example (FIG. 7), since a large amount of refrigerant vapor is generated,
120 kg / h of the refrigerant liquid flows from the low-temperature regenerator 2 into the condenser 3, whereby 844-238 = 606
(MmHg) pressure loss. That is, considering the condenser 3 as a reference, the vapor pressure in the low-temperature regenerator 2 increases, and accordingly, the pressure in the high-temperature regenerator 1 becomes 874 mm.
Hg and became higher than atmospheric pressure.

In contrast, in the present embodiment (FIG. 1), the gate valve 32 is opened during the heating-up operation, and a part (31.5 kg / h) of the refrigerant vapor in the low-temperature regenerator 2 is removed from the evaporator 4. To the condenser 3 from the low-temperature regenerator drain chamber 2d.
The flow rate of the refrigerant liquid flowing to is reduced to 88.5 kg / h,
The pressure loss between the two is reduced, the steam pressure in the low temperature regenerator 2 becomes 527 mmHg, and the steam pressure in the high temperature regenerator 1 becomes 557 mmHg.
mmHg. The internal pressure of the high-temperature regenerator 1 in this state is negative with respect to the atmospheric pressure with a sufficient margin. As described above, the embodiment shown in FIG. 1 is a bypass pipe 31 provided with a gate valve 32 as a valve means that can be closed between the drain chamber 2 d of the low-temperature regenerator 2 and the evaporator 4.
The simple and inexpensive structure of providing the U-shaped seal tube 11 and / or the bubble pump 30 does not hinder the function specific to the absorption-type water heater / cooler, and the “high-temperature regenerator can be used during the cooling operation. In the "heating increasing operation in which the heat amount exceeding the rated value is input," it is possible to suppress the increase in the refrigerant vapor pressure in the high-temperature regenerator 1 and keep the refrigerant vapor pressure at or below the atmospheric pressure (in a state not legally regulated as a pressure vessel). it can.

As can be easily understood from the operation and effects described above with reference to FIG. 1, when this embodiment is viewed as a method invention, the essential items for achieving the object are the low temperature regenerator. By reducing the amount of refrigerant liquid generated in the low-temperature regenerator by bypassing the refrigerant vapor from the drain chamber to the evaporator, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced by the “high-temperature regenerator during the heating operation. The amount of heat per unit time given to the cooling unit is reduced to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in the heating standard state, which does not increase compared to the cooling operation. While maintaining the pressure at or below atmospheric pressure, the amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and the refrigerant vapor flow generated from the high-temperature regenerator while preventing abnormal pressure rise in the high-temperature regenerator It is to increase operating heating to increase the.

FIG. 2 shows a main part of the cycle flow of the heating-increase type absorption chiller / heater in an embodiment different from the above, in which the refrigerant vapor flow is drawn by thick arrows and the flow of refrigerant liquid is drawn by thin arrows. FIG. 3 is a schematic diagram for explaining a pressure-flow rate balance, in which a flow rate value is enclosed in a rectangular frame and a pressure value is additionally enclosed in an oval frame. In this embodiment, the low-temperature regenerator drain chamber 2d and the condenser 3 are connected by a bypass line 33, and a gate valve 34 as valve means that can be closed is connected to the bypass line 33. It is. When the amount of heat given to the high-temperature regenerator 1 is increased and the heating operation is performed at a flow rate of the generated refrigerant vapor of 120 kg / h as in the embodiment of FIG. 1, a part of the refrigerant vapor in the low-temperature regenerator drain chamber 2d Through the bypass line 33 and the gate valve 34
The condenser 3 is bypassed at 1.5 kg / h. Thereby, the flow rate of the refrigerant liquid flowing from the low-temperature regenerator 2 to the condenser 3 is reduced to 120-31.5 = 88.5 (kg / h). Along with this, the pressure loss between the two decreases, and the refrigerant vapor pressure in the high-temperature regenerator 1 decreases to 579 mmHg, and becomes lower than the atmospheric pressure. Extracting the main points of the reason why such an effect could be obtained, and summarizing the invention method, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the condenser to reduce the amount of heat exchange in the low-temperature regenerator, This is because by reducing the amount of refrigerant liquid generated in the low-temperature regenerator, the flow rate of the refrigerant liquid from the low-temperature regenerator drain chamber to the condenser is reduced, and the pressure loss between the two is reduced.

FIG. 3 is a schematic diagram showing a main part of a cycle flow in an increased heating absorption type chiller / heater according to an embodiment different from the above. In FIG. 3, the flow of refrigerant vapor is drawn by thick arrows and the flow of refrigerant liquid is shown. Draw the direction with a thin arrow, and
The numerical values of the flow rate are indicated by enclosing them in a rectangular frame, and the numerical values of the pressure are indicated by enclosing them in an oval frame to represent the pressure-flow rate balance. In the embodiment of FIGS. 1 and 2 described above, the refrigerant vapor in the low temperature regenerator drain chamber 2d is bypassed to the downstream side.
A return line 35 having a gate valve 35 is connected between the low-temperature regenerator drain chamber 2d and the main body of the low-temperature regenerator 2 so that a part of the refrigerant liquid in the low-temperature regenerator drain chamber 2d has a flow rate of 88.
Reflux at 5 kg / h. As a result, of the refrigerant vapor flow rate of 120 kg / h generated in the high-temperature regenerator 1, the flow rate of the refrigerant liquid flowing directly to the condenser via the low-temperature regenerator drain section 2d is 120-88.5 = 31. 5 (kg / h), and the pressure loss between the two decreases accordingly. Due to the decrease in the pressure loss, the internal pressure of the low-temperature regenerator decreases, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator 1 becomes 557 mm.
Hg, and becomes a negative pressure with a sufficient margin to the atmospheric pressure. In the embodiment of FIG. 3, the main points of the reason why the above-described effect was obtained can be extracted and summarized.To summarize, the refrigerant liquid in the low-temperature regenerator drain chamber is returned to the main body of the low-temperature regenerator,
This is because the flow rate of the refrigerant liquid sent to the condenser was reduced.

[0033]

As described above, the configuration and function of the embodiment of the present invention are clarified. According to the method of the first aspect of the present invention, the advantages of the absorption chiller / heater equipped with the U-shaped sealing pipe are provided. Without losing the effect of being able to switch between cooling operation and heating operation without switching piping for the cycle flow system or installing valves for opening and closing the flow path, The simple operation of "bypassing the refrigerant vapor from the regenerator to the evaporator" can reduce the pressure loss between the low-temperature regenerator drain chamber and the condenser. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the balance between fluid dynamics and thermodynamics, applying this claim does not necessarily increase the heating capacity indefinitely. According to experiments by the inventors, when the specification of the heating standard is set for Central Japan to West Japan,
When the invention of this claim is applied in response to the increase in the refrigerant vapor flow rate generated by the high-temperature regenerator due to the increase in heating in the cold district specifications for Hokkaido, the refrigerant vapor pressure in the high-temperature regenerator is maintained at a negative pressure compared to the atmospheric pressure It was confirmed that it was possible.

According to the method of the second aspect of the present invention, there is provided an advantage of an absorption type water chiller / heater having a U-shaped seal pipe. The cooling operation can be switched between heating operation and cooling operation without the need to perform a simple operation of `` bypassing refrigerant vapor from the low-temperature regenerator to the condenser '' without deteriorating the effect The pressure loss between the vessel and the vessel can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption type water heater / cooler is determined by the hydrodynamic and thermodynamic balances, applying this claim does not necessarily increase the heating capacity indefinitely.
According to experiments by the present inventors, the specifications of the heating standard were
When set for western Japan, applying the invention of this claim in response to the increase in the high-temperature regenerator-generated refrigerant vapor flow rate due to increased heating in the cold district specifications for Hokkaido, the refrigerant vapor pressure in the high-temperature regenerator is reduced to atmospheric pressure. It was confirmed that a negative pressure could be maintained in comparison.

According to the method of the third aspect of the present invention, there is provided an advantage of an absorption type water chiller / heater equipped with a U-shaped seal pipe. The cooling operation can be switched between the cooling operation and the heating operation without the need for cooling '' and the simple operation of `` recirculating the refrigerant liquid from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator '' without impairing the effect. The pressure loss between the regenerator drain chamber and the condenser can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is,
Even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the increase in the internal pressure of the high-temperature regenerator is suppressed by the reduced pressure loss. be able to. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the balance between fluid dynamics and thermodynamics, applying this claim does not necessarily increase the heating capacity indefinitely. According to experiments by the present inventors, when the specification of the heating standard is set for central Japan to western Japan, in response to an increase in the flow rate of the high-temperature regenerator-generated refrigerant vapor due to an increase in heating in the cold district specification for Hokkaido, the claim 2 Applying the invention,
It has been confirmed that the refrigerant vapor pressure in the high-temperature regenerator can be maintained at a negative pressure compared to the atmospheric pressure.

According to the fourth aspect of the present invention, the "cycle flow system" which is an advantage of the absorption type chiller / heater of the type in which the refrigerant liquid at the bottom of the evaporator is pumped by the bubble pump driven by the refrigerant vapor. It is possible to switch between the cooling operation and the heating operation without switching the piping or installing valves for opening and closing the flow path. The simple operation of bypassing can reduce the pressure loss between the cryogenic regenerator drain chamber and the condenser, which reduces the refrigerant vapor pressure in the cryogenic regenerator when considered with respect to the condenser. Therefore, the refrigerant vapor pressure in the high-temperature regenerator decreases, that is, the amount of heat input to the high-temperature regenerator for the heating increasing operation increases, and the cooling generated from the high-temperature regenerator increases. Even if the flow rate of steam is increased, it is possible to suppress an increase in the internal pressure of the high-temperature regenerator by the reduced amount of the pressure loss. Since it is determined by the natural balance, when applying the present claim, it is not always possible to increase the heating capacity indefinitely, but by the experiments of the present inventors, the specification of the heating standard was set for Central Japan-West Japan In this case, when the invention of the present invention is applied in response to an increase in the flow rate of the refrigerant vapor generated by the high-temperature regenerator due to an increase in heating in a cold district specification for Hokkaido, the refrigerant vapor pressure in the high-temperature regenerator becomes a negative pressure compared to the atmospheric pressure. It was confirmed that it could be maintained.

According to the fifth aspect of the present invention, there is provided an advantage of an absorption type chiller / heater equipped with a bubble pump. Without losing the effect of `` being able to switch between cooling operation and heating operation without '', the simple operation of `` bypassing refrigerant vapor from the low-temperature regenerator to the condenser '' and the low-temperature regenerator drain chamber and condenser Can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the balance between fluid dynamics and thermodynamics, applying this claim does not necessarily increase the heating capacity indefinitely.
According to experiments by the present inventors, the specifications of the heating standard were
When set for western Japan, applying the invention of this claim in response to the increase in the high-temperature regenerator-generated refrigerant vapor flow rate due to increased heating in the cold district specifications for Hokkaido, the refrigerant vapor pressure in the high-temperature regenerator is reduced to atmospheric pressure. It was confirmed that a negative pressure could be maintained in comparison.

According to the method of the present invention, the advantage of the absorption type chiller / heater equipped with the bubble pump is that "the piping is switched with respect to the cycle flow system and valves for opening and closing the flow path are installed." The low-temperature regenerator can be switched between the cooling operation and the heating operation without loss of the effect by simply operating the "refrigerant liquid from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator" The pressure loss between the drain chamber and the condenser can be reduced. As a result, the refrigerant vapor pressure in the low-temperature regenerator decreases when considered on the basis of the condenser, and accordingly, the refrigerant vapor pressure in the high-temperature regenerator decreases. That is, even if the amount of heat input to the high-temperature regenerator for the heating increasing operation is increased to increase the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the internal pressure of the high-temperature regenerator is increased by the reduced pressure loss. Can be suppressed. Since the distribution of flow rate and pressure in the cycle flow of the absorption chiller / heater is determined by the balance between the fluid dynamics and the thermodynamics, it is not always possible to increase the heating capacity indefinitely by applying this claim. According to the experiments of the present inventors, when the heating standard specification is set for Central Japan to West Japan, in response to the increase in the high-temperature regenerator-generated refrigerant vapor flow rate due to the increase in heating for cold district specifications for Hokkaido, the claims of the present invention. It has been confirmed that when the invention is applied, the refrigerant vapor pressure in the high-temperature regenerator can be maintained at a negative pressure as compared with the atmospheric pressure.

According to the seventh aspect of the present invention, the bypass line having the valve means which can be closed is provided between the drain chamber of the low temperature regenerator and the evaporator. By opening this means during the valve closing and heating operation, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high temperature regenerator at a negative pressure with respect to the atmospheric pressure. According to the present invention, since the bypass line having the valve means which can be closed is provided between the drain chamber of the low-temperature regenerator and the condenser, the valve means is closed during the cooling operation. By opening the valve means during the heating operation, the heating increase operation can be performed while maintaining the pressure of the refrigerant vapor in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure. According to the ninth aspect of the present invention, since the return line having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the main body, the valve means is closed during the cooling operation. By opening the valve means during the heating operation, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure. Claim 1
According to the apparatus of the present invention, since the bypass pipe having the closable valve means is provided between the drain chamber of the low-temperature regenerator and the evaporator, the valve means is closed during the cooling operation to perform the heating operation. At times, by opening this valve means, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure. According to the eleventh aspect of the present invention, since the bypass line having the valve means that can be closed is provided between the drain chamber of the low-temperature regenerator and the condenser, the valve means is closed during the cooling operation. By opening this valve means during the heating operation, while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure,
Heating can be increased. According to the twelfth aspect of the present invention, since the return line having the closable valve means is provided between the drain chamber of the low-temperature regenerator and the main body, the valve means is closed during the cooling operation. By opening the valve means during the heating operation, the heating increase operation can be performed while maintaining the refrigerant vapor pressure in the high-temperature regenerator at a negative pressure with respect to the atmospheric pressure.

[Brief description of the drawings]

FIG. 1 is a system diagram schematically showing a cycle flow during an increased heating operation in an embodiment of an increased heating absorption type water cooler / heater according to the present invention, in which the flow direction of gas components is drawn by thick arrows. At the same time, the flow direction of the liquid component is drawn by a thin arrow, and the numerical value of the flow rate is enclosed by a rectangular frame and the numerical value of the pressure is enclosed by an oval frame, and represents the flow rate-pressure.

FIG. 2 shows a main part of a cycle flow of the heating-increase type absorption chiller / heater in an embodiment different from the above, in which the flow of refrigerant vapor is drawn by thick arrows, the flow of refrigerant liquid is drawn by thin arrows, and the flow rate is Numerical values are enclosed in a rectangular frame, and pressure values are enclosed in an oval frame.
It is a schematic diagram for demonstrating pressure-flow balance.

FIG. 3 is a schematic diagram of a main part of a cycle flow in the heating-increase type absorption chiller / heater, showing a further different embodiment from the above. In FIG. Drawing a thin arrow, and adding a flow rate numerical value by enclosing it in a rectangular frame and adding a pressure numerical value by enclosing it in an oval frame, indicates the pressure-flow rate balance.

FIG. 4 is a cycle flow diagram schematically illustrating an example of an absorption chiller / heater provided with a U-shaped seal tube, and the names of the added components are used for cooling operation of the absorption chiller / heater. The name is based on the function of the case.

FIG. 5 shows a known absorption chiller / heater equipped with a bubble pump.
It is a cycle flow figure which shows an example. However, it is different from the actual diagram because it is drawn schematically to make it easier to understand the structure and functions. It is.

FIG. 6 schematically illustrates an absorption type chiller / heater having a U-shaped seal tube and a bubble pump according to the latest known technology, in which a flow direction of a gas component in a heating standard time is indicated by a thick arrow and a flow of a liquid component is shown. It is a flow-pressure balance explanatory diagram in which the direction is represented by a thin arrow, and the flow rate value in heating standard time is enclosed by a rectangular frame, and the pressure value is enclosed by an oval frame.

FIG. 7 is an explanatory diagram of a flow-pressure balance in a case where the amount of heat given to the high-temperature regenerator of the absorption chiller / heater shown in FIG. The name is a name based on the function in a state where the absorption type water heater / cooler is in a cooling operation.

[Explanation of symbols]

1 high temperature regenerator, 2 low temperature regenerator, 2a heat transfer tube, 2
d: drain chamber, 3: condenser, 3a: cold water, 4: evaporator,
4a: hot water, 5: absorber, 6: low temperature heat exchanger, 7: high temperature heat exchanger, 8: solution circulation pump, 9: refrigerant spray pump, 10: refrigerant liquid conduit, 11: U-shaped seal tube, 12: refrigerant Spray conduit, 13: float valve, 14: refrigerant tank,
15 branch pipe, 16 refrigerant blow pipe, 17 refrigerant blow valve, 18, 19 throttle, 20, 21 mist separator, 22, 23, 24 spray header, 25 gas-liquid separator, 26 refrigerant refrigerant conduit , 27 ... refrigerant liquid conduit, 28 ... refrigerant vapor conduit, 30 ... bubble pump, 31 ... bypass line,
32: gate valve, 33: bypass line, 34: gate valve, 3
5 ... return line, 36 ... gate valve.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Enouchi 1-9-1 Kida Yotodai, Tsuchiura-shi, Ibaraki Hitachi Building Facilities Engineering Co., Ltd. (72) Inventor Keiji Tachibana Kazuyoshi Kanda, Chiyoda-ku, Tokyo 1 Izumicho F-term in Hitachi Building Facilities Engineering Co., Ltd. (Reference) 3L093 AA05 BB11 BB29 BB31 BB37 BB42 BB47 DD10 EE08 EE09 HH07 HH08 JJ04 KK05 LL03

Claims (12)

[Claims] 1. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. The absorption type chiller / heater comprising connecting the gas phase part and the evaporator via a U-shaped seal pipe and connecting a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe is operated. When the heating operation is performed by using the absorption type chiller / heater, cooling operation is performed,
In a method of increasing the amount of heat given to the high-temperature regenerator and increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator to increase the heating capacity, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the evaporator. By reducing the amount of refrigerant liquid generated in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced by comparing the amount of heat per unit time given to the high-temperature regenerator during heating operation to that during cooling operation. "Pressure loss between the low-temperature regenerator drain chamber and the condenser" under the condition of the heating standard that cannot be increased
While maintaining the pressure inside the high-temperature regenerator below the atmospheric pressure, the amount of heat given to the high-temperature regenerator increases from the rated value in the cooling operation state, preventing abnormal pressure rise in the high-temperature regenerator And increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator while increasing the heating operation. 2. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. The absorption type chiller / heater comprising connecting the gas phase part and the evaporator via a U-shaped seal pipe and connecting a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe is operated. When the heating operation is performed by using the absorption type chiller / heater,
In a method of increasing the amount of heat applied to the high-temperature regenerator and increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator to increase the heating capacity, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the condenser. By reducing the amount of heat exchange in the low-temperature regenerator and the amount of refrigerant liquid generated in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser is given to the high-temperature regenerator during the heating operation. "Pressure loss between the low-temperature regenerator drain chamber and the condenser" in the "heating standard state where the amount of heat per unit time is not increased compared to the cooling operation"
While maintaining the pressure inside the high-temperature regenerator below atmospheric pressure, the amount of heat given to the high-temperature regenerator increases from the rated value in the cooling operation state, preventing abnormal pressure rise in the high-temperature regenerator And increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator while increasing the heating operation. 3. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. The absorption type chiller / heater comprising connecting the gas phase part and the evaporator via a U-shaped seal pipe and connecting a branch pipe branched from the discharge side of the refrigerant spray pump to the U-shaped seal pipe is operated. When performing the heating operation by using the absorption type chiller / heater,
In a method of increasing the amount of heat given to the high-temperature regenerator and increasing the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the refrigerant liquid is transferred from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator. By refluxing and reducing the flow rate of the refrigerant liquid sent to the condenser, the pressure loss between the low-temperature regenerator drain chamber and the condenser can be reduced to `` the amount of heat per unit time given to the high-temperature regenerator during heating operation,
Reduce the pressure in the high-temperature regenerator to below atmospheric pressure by reducing it to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in "Heating standard condition that does not increase compared to cooling operation". While maintaining, the amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and the heating increase operation is performed by increasing the refrigerant vapor flow generated from the high-temperature regenerator while preventing abnormal pressure rise in the high-temperature regenerator. A method for increasing the heating capacity of an absorption chiller / heater, comprising: 4. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. When operating an absorption type chiller / heater equipped with a “bubble pump driven by refrigerant vapor as a driving source” for pumping the refrigerant liquid accumulated at the bottom and guiding it to an absorber, the heating operation is performed by the absorption type Compared to the case where the water heater is operated for cooling,
In a method of increasing the amount of heat given to the high-temperature regenerator and increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator to increase the heating capacity, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the evaporator. By reducing the amount of refrigerant liquid generated in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced by comparing the amount of heat per unit time given to the high-temperature regenerator during heating operation to that during cooling operation. "Pressure loss between the low-temperature regenerator drain chamber and the condenser" under the condition of the heating standard that cannot be increased
While maintaining the pressure inside the high-temperature regenerator below the atmospheric pressure, the amount of heat given to the high-temperature regenerator increases from the rated value in the cooling operation state, preventing abnormal pressure rise in the high-temperature regenerator And increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator while increasing the heating operation. 5. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. When operating an absorption type chiller / heater equipped with a “bubble pump driven by refrigerant vapor” as a driving source for pumping the refrigerant liquid accumulated at the bottom and guiding the refrigerant to the absorber, the absorption type Compared to the case where the water heater is operated for cooling,
In a method of increasing the amount of heat applied to the high-temperature regenerator and increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator to increase the heating capacity, the refrigerant vapor is bypassed from the drain chamber of the low-temperature regenerator to the condenser. By reducing the amount of heat exchange in the low-temperature regenerator and the amount of refrigerant liquid generated in the low-temperature regenerator, the pressure loss between the low-temperature regenerator drain chamber and the condenser is given to the high-temperature regenerator during the heating operation. "Pressure loss between the low-temperature regenerator drain chamber and the condenser" in the "heating standard state where the amount of heat per unit time is not increased compared to the cooling operation"
While maintaining the pressure inside the high-temperature regenerator below the atmospheric pressure, the amount of heat given to the high-temperature regenerator increases from the rated value in the cooling operation state, preventing abnormal pressure rise in the high-temperature regenerator And increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator while increasing the heating operation. 6. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. When operating an absorption type chiller / heater equipped with a “bubble pump driven by refrigerant vapor as a driving source” for pumping the refrigerant liquid accumulated at the bottom and guiding it to an absorber, the heating operation is performed by the absorption type Compared to the case where the water heater is operated for cooling,
In a method of increasing the amount of heat given to the high-temperature regenerator and increasing the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, the refrigerant liquid is transferred from the drain chamber of the low-temperature regenerator to the main body of the low-temperature regenerator. By refluxing and reducing the flow rate of the refrigerant liquid sent to the condenser, the pressure loss between the low-temperature regenerator drain chamber and the condenser can be reduced to `` the amount of heat per unit time given to the high-temperature regenerator during heating operation,
Reduce the pressure in the high-temperature regenerator to below atmospheric pressure by reducing it to almost the same level as the "pressure loss between the low-temperature regenerator drain chamber and the condenser" in "Heating standard condition that does not increase compared to cooling operation". While maintaining, the amount of heat given to the high-temperature regenerator is increased from the rated value in the cooling operation state, and the heating increase operation is performed by increasing the refrigerant vapor flow generated from the high-temperature regenerator while preventing abnormal pressure rise in the high-temperature regenerator. A method for increasing the heating capacity of an absorption chiller / heater, comprising: 7. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption chiller / heater comprising a gas-phase part and an evaporator connected via a U-shaped seal pipe, and a branch pipe branched from a discharge side of the refrigerant spray pump connected to the U-shaped seal pipe. , Compared to the case where the absorption type chiller / heater is operated for cooling,
In the heating-increase-type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, Between the drain chamber and the evaporator, there is provided a bypass pipe provided with a closable valve means, and the valve means can be opened to allow the refrigerant vapor to be bypassed from the low-temperature regenerator to the evaporator. By opening the valve means, the pressure loss between the drain chamber of the low-temperature regenerator and the condenser is reduced, the amount of heat given to the high-temperature regenerator is increased, and the refrigerant vapor generated from the high-temperature regenerator Characterized by a structure in which an increase in refrigerant vapor pressure in the high-temperature regenerator is suppressed even when the flow rate of the high-temperature regenerator is increased, and is maintained at or below atmospheric pressure. 8. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption chiller / heater comprising a gas-phase part and an evaporator connected via a U-shaped seal pipe, and a branch pipe branched from a discharge side of the refrigerant spray pump connected to the U-shaped seal pipe. , As compared to the case where the absorption type chiller / heater is operated for cooling,
In the heating-increase type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, A bypass line provided with a closable valve means is provided between the drain chamber and the condenser, and the valve means can be opened to allow refrigerant vapor to be bypassed from the low-temperature regenerator to the condenser. By opening the valve means, the pressure loss between the drain chamber of the low-temperature regenerator and the condenser is reduced, the amount of heat given to the high-temperature regenerator is increased, and the refrigerant vapor generated from the high-temperature regenerator Characterized by a structure in which an increase in refrigerant vapor pressure in the high-temperature regenerator is suppressed even when the flow rate of the high-temperature regenerator is increased, and is maintained at or below atmospheric pressure. 9. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump; An absorption chiller / heater comprising a gas-phase part and an evaporator connected via a U-shaped seal pipe, and a branch pipe branched from a discharge side of the refrigerant spray pump connected to the U-shaped seal pipe. , As compared to the case where the absorption type chiller / heater is operated for cooling,
In the heating-increase type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, A return line provided with a closable valve means is provided between the drain chamber and the main body of the low-temperature regenerator, and the valve means is opened to allow the refrigerant to flow from the drain chamber of the low-temperature regenerator to the main body. By opening the valve means, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced, and the amount of heat given to the high-temperature regenerator is increased. Even if the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, the increase in the refrigerant vapor pressure in the high-temperature regenerator is suppressed, and the structure is maintained at or below the atmospheric pressure. Absorption chiller / heater. 10. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption type chiller / heater provided with a “bubble pump driven by refrigerant vapor as a driving source” for pumping the refrigerant liquid accumulated at the bottom and guiding the refrigerant to the absorption pipe, and the absorption chiller / heater is operated for cooling. In comparison to the case,
In the heating-increase type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, Between the drain chamber and the evaporator, there is provided a bypass pipe provided with a closable valve means, and the valve means can be opened to allow the refrigerant vapor to be bypassed from the low-temperature regenerator to the evaporator. By opening the valve means, the pressure loss between the drain chamber of the low-temperature regenerator and the condenser is reduced, the amount of heat given to the high-temperature regenerator is increased, and the refrigerant vapor generated from the high-temperature regenerator Characterized by a structure in which an increase in refrigerant vapor pressure in the high-temperature regenerator is suppressed even when the flow rate of the high-temperature regenerator is increased, and is maintained at or below atmospheric pressure. 11. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption chiller / heater provided with a “bubble pump driven by refrigerant vapor as a drive source” for pumping the refrigerant liquid accumulated at the bottom and guiding the liquid to the absorber, and the cooling chiller / heater is operated for cooling. Compared to the case
In the heating-increase type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, A bypass line provided with a closable valve means is provided between the drain chamber and the condenser, and the valve means can be opened to allow refrigerant vapor to be bypassed from the low-temperature regenerator to the condenser. By opening the valve means, the pressure loss between the drain chamber of the low-temperature regenerator and the condenser is reduced, the amount of heat given to the high-temperature regenerator is increased, and the refrigerant vapor generated from the high-temperature regenerator Characterized by a structure in which an increase in refrigerant vapor pressure in the high-temperature regenerator is suppressed even when the flow rate of the high-temperature regenerator is increased, and is maintained at or below atmospheric pressure. 12. A high-temperature regenerator, a low-temperature regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a solution circulation pump, and a refrigerant spray pump. An absorption chiller / heater provided with a “bubble pump driven by refrigerant vapor as a drive source” for pumping the refrigerant liquid accumulated at the bottom and guiding the liquid to the absorber, and the cooling chiller / heater is operated for cooling. Compared to the case
In the heating-increase type absorption chiller / heater configured to increase the amount of heat given to the high-temperature regenerator and increase the heating capacity by increasing the flow rate of the refrigerant vapor generated from the high-temperature regenerator, A return line provided with a closable valve means is provided between the drain chamber and the main body of the low-temperature regenerator, and the valve means is opened to allow the refrigerant to flow from the drain chamber of the low-temperature regenerator to the main body. By opening the valve means, the pressure loss between the low-temperature regenerator drain chamber and the condenser is reduced, and the amount of heat given to the high-temperature regenerator is increased. Even if the flow rate of the refrigerant vapor generated from the high-temperature regenerator is increased, the increase in the refrigerant vapor pressure in the high-temperature regenerator is suppressed, and the structure is maintained at or below the atmospheric pressure. Absorption chiller / heater.