JP2000186866A - Absorption refrigeration apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep stable capability by eliminating refrigerant vapor leakage into a regenerator and an overflow of an absorption solution into a refrigerant recovery tank. SOLUTION: An intermediate concentration absorption solution separation cylinder 12 is enclosed with an absorption solution limit plate 15 equipped with a valve mechanism 16. When a liquid level of an absorption solution in the intermediate concentration absorption solution separation cylinder 12 is low, refrigerant vapor separated from an absorber passes through the valve mechanism 16 and is moved to a refrigerant recovery tank 10. When the liquid level of the absorption solution is high, a float valve structure 17 closes a valve hole and hence the absorption solution is prevented from being overflowed to the refrigerant recovery tank 10. The refrigerant vapor produced here moves from a small opening 18 to the refrigerant recovery tank 10, but since an opening area is small, the amount of the movement is restricted and hence pressure in the intermediate concentration absorption solution separation cylinder 12 becomes higher, whereby supply of a solution to the regenerator from the absorption solution pump is reduced and the amount of discharge from the regenerator is increased. Further, variations of the liquid level of the absorption solution are limited, and hence stable capability is kept.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating apparatus in which an absorption cycle is formed by using an aqueous solution of lithium bromide or the like as an absorbing liquid, and more particularly, to the level of an absorbing liquid in a regenerator heated by a heating means. Related to stabilization.

[0002]

2. Description of the Related Art Conventionally, in an absorption air conditioner using an absorption refrigeration system, an absorption cycle of the absorption refrigeration system is
The low-concentration absorbent in the high-temperature regenerator is heated by the heating means, and the refrigerant in the low-concentration absorbent is evaporated and separated into a medium-concentration absorbent, and the low-temperature absorbent is cooled by the latent heat of the refrigerant vapor in the high-temperature regenerator. The medium concentration absorbent in the regenerator is heated, and similarly, the refrigerant is evaporated and separated from the medium concentration absorbent to form a high concentration absorbent.

[0003] The high-concentration absorbent concentrated in a low-temperature regenerator
The refrigerant supplied to the absorber and separated by each regenerator is condensed by the condenser to be a refrigerant liquid, and supplied to the evaporator. In the evaporator, the refrigerant liquid supplied on the evaporator coil is evaporated, and the refrigerant liquid evaporates to remove heat from the cold / hot water in the evaporator coil (cold / hot water pipe) to use the cooled cold / hot water as a cooling source. .

[0004] On the other hand, in the absorber, the refrigerant vapor generated in the evaporator is absorbed by the high-concentration absorbing liquid to make the low-concentration absorbing liquid, and the heat generated at the time of absorption is passed through a cooling coil (cooling water pipe). Cool with cooling water. The absorbent having a low concentration in the absorber is returned to the high-temperature regenerator by the absorbent pump, and the circulation is repeated in the absorption cycle.

[0005] In the circulation of the absorption cycle, the absorption pump for returning the absorption liquid from the absorber to the high-temperature regenerator includes:
When sending the absorbing liquid into a high-temperature, high-pressure regenerator heated by a heating means such as a burner, a pressure higher than the pressure in the high-temperature regenerator must be secured. However, the pressure in the high-temperature regenerator is not constant, and changes according to the operation state (refrigeration load). For this reason, conventionally, by detecting the temperature of the absorbent in the high-temperature regenerator, the pressure in the high-temperature regenerator is detected instead, and the rotation speed of the absorbent pump is controlled based on the detected temperature of the absorbent. are doing.

[0006]

In the absorption refrigeration system, the pressure in the high-temperature regenerator is affected by the concentration of the absorbent returned to the high-temperature regenerator even if the temperature of the absorbent is the same. Therefore, instead of detecting the pressure in the high-temperature regenerator as described above, in the conventional absorption refrigerating apparatus configured to detect the temperature of the absorbent in the high-temperature regenerator, actually, the high-temperature regenerator The internal pressure cannot be specified only by the absorption liquid temperature. Therefore, by controlling the number of revolutions of the absorbent pump based on the temperature of the absorbent, the level of the absorbent in the high-temperature regenerator cannot be constantly controlled, and the level of the absorbent in the high-temperature regenerator cannot be controlled. When the temperature drops below the outlet of the medium-concentration absorbent flow path for supplying the medium-concentration absorbent from the high-temperature regenerator to the low-temperature regenerator, the refrigerant vapor in the high-temperature regenerator flows to the medium-concentration absorbent liquid flow path. Problems such as leakage and leakage to the low-temperature regenerator may occur, leading to problems such as a reduction in efficiency. Conversely, if the level of the absorbing liquid in the high-temperature regenerator rises and overflows into the refrigerant recovery tank outside the high-temperature regenerator, the refrigerant separated from the absorbing liquid and the absorbing liquid are mixed, and the refrigeration capacity is reduced. There is a problem that brings.

SUMMARY OF THE INVENTION It is an object of the present invention to stabilize the liquid level of an absorbing solution in a high-temperature regenerator, to prevent refrigerant vapor from leaking and overflowing the absorbing solution, and to ensure stable performance.

[0008]

According to a first aspect of the present invention, a low-concentration absorbent is separated into a high-concentration absorbent and a refrigerant in a regenerator heated by a heating means, and the inside of the evaporator is air-conditioned. A refrigerant liquid is sprayed and evaporated on an evaporating coil through which cold and hot water flows as a heat medium for cooling, and the cold and hot water is cooled. In the absorber, cooling water connected to a cooling tower and cooling water for exhaust heat flows inside. Spraying the high concentration absorbing liquid on the cooling coil to absorb the evaporated refrigerant,
In an absorption refrigeration apparatus in which a low-concentration absorbing solution that has absorbed a refrigerant and reduced in concentration is returned to the regenerator by an absorbing solution pump provided in a low-concentration absorbing solution channel, heating of the regenerator heated by the heating means A floating valve which forms an extension container part upward from the part, arranges an opening of an absorption liquid outflow pipe through which the absorption liquid flows out at the lower part of the extension container part, and floats on the level of the absorption liquid in the regenerator. A valve mechanism for opening and closing a valve port by a body is provided at an upper portion of the extension container section, and an upper side of the valve mechanism is a refrigerant recovery section.

According to a second aspect of the present invention, in the first aspect, a small opening communicating with the refrigerant recovery portion is formed at an upper portion of the extension container portion separately from a valve port of the valve mechanism.

[0010]

According to the first aspect of the present invention, in the first aspect, the low-concentration absorbing liquid that has absorbed the refrigerant in the absorber and has a low concentration is sent into the regenerator by the absorbing liquid pump. In the regenerator, an extension container part is formed above the heating part heated by the heating means, and the valve mechanism that opens and closes the valve port by a floating valve body floating on the level of the absorbent in the regenerator is extended. It is provided on the upper part of the container part. In addition, an opening of an absorbent outflow pipe through which the absorbent flows out is provided at a lower portion of the extension container portion.

Therefore, the level of the absorbing liquid in the regenerator is low,
When the floating valve body of the valve mechanism does not close the valve port, the refrigerant supplied into the regenerator and separated from the heated absorption liquid passes through the valve port of the valve mechanism in the upward direction and regenerates. To the refrigerant recovery part outside the On the other hand, the absorbent in the regenerator flows out of the regenerator through the opening of the absorbent outflow pipe according to the pressure in the regenerator communicating with the refrigerant recovery unit.

The amount of the absorbing liquid supplied to the regenerator increases,
When the liquid level of the absorbent in the regenerator rises and the valve port is closed by the floating valve body of the valve mechanism, the pressure in the regenerator increases,
The supply amount of the absorbing liquid from the absorbing liquid pump is reduced. Further, since the absorbent in the regenerator flows out of the opening of the absorbent outflow pipe according to the pressure in the regenerator, the level of the absorbent in the regenerator drops, and the floating valve of the valve mechanism drops. To open the valve.

When the valve port is opened, the pressure in the high-temperature regenerator decreases, so that the liquid level rises again, and the floating valve body closes the valve port again. Is maintained at the upper liquid level in the regenerator.

Therefore, the flow rate of the absorbent circulating in the absorption cycle is set to be relatively large as compared with the conventional case, so that the liquid level of the absorbent in the regenerator rises and is closed by the valve mechanism. By opening and closing the valve port by the valve mechanism as described above, the liquid level in the regenerator is maintained above the vicinity of the valve port,
The liquid level of the absorbing liquid does not drop too much to the opening position of the absorbing liquid outflow pipe.

When the amount of the absorbing liquid supplied to the regenerator becomes excessive, the valve mechanism is closed, so that the absorbing liquid supplied to the regenerator flows out of the opening of the absorbing liquid outlet pipe. As a result, there is no possibility of overflowing above the regenerator, and the problem that the separated refrigerant and the absorbing liquid are mixed again does not occur. As a result, a stable refrigerating capacity can be ensured without a decrease in the refrigerating capacity due to a change in the liquid level of the absorbing liquid.

According to the second aspect of the present invention, a small opening communicating with the refrigerant recovery portion is formed in the upper portion of the extension container portion separately from the valve port of the valve mechanism. When the position rises and the valve mechanism closes, the refrigerant vapor generated in the regenerator moves from the small opening to the refrigerant recovery section. Therefore, when the refrigerant vapor flows out of the small opening, the pressure of the refrigerant vapor acting on the floating valve body to the valve port side is reduced, and when the level of the absorbing liquid falls, the floating valve of the valve mechanism The body can be reliably opened by its own weight. Therefore,
The opening and closing of the valve mechanism can be performed smoothly.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an air conditioner using an absorption refrigeration system according to the present invention. The air conditioner includes an absorption refrigeration apparatus 100 including a refrigerator main body 101 and a cooling tower (cooling tower) CT as an outdoor unit.
Is attached. This air conditioner is controlled by the control device 300.

The refrigerator main body 101 includes a high-temperature regenerator 1 and a low-temperature regenerator 2, and a gas burner B as a heating source is disposed below the high-temperature regenerator 1. Low temperature regenerator 2
An absorber 3 and an evaporator 4 are provided on the outer periphery of the device, and a condenser 5 is provided above the evaporator 4.

A high-temperature regenerator 1 is heated by a gas burner B, and heats a tank 1 for boiling the low-concentration absorbing liquid therein.
1 and a medium-concentration-absorbent-liquid separating cylinder 12 that extends upward from the top of the heating tank 11 and separates refrigerant vapor and medium-concentration-absorbent liquid that has been concentrated by evaporation of the refrigerant vapor. A vertical cylindrical airtight refrigerant recovery tank 10 for recovering the refrigerant vapor is provided on the outer periphery of the medium-concentration absorption liquid separation cylinder 12. The heating tank 11 has a substantially inverted bowl shape, and closes the upper part of the combustion space of the gas burner B.

An absorbing liquid partitioning vessel 13 is disposed inside the medium concentration absorbing liquid separating cylinder 12, and an absorbing liquid ascending flow 14 is formed between the medium concentration absorbing liquid separating cylinder 12 and the absorbing liquid dividing vessel 13. Have been. The medium-concentration absorbent separation cylinder 12 is divided into upper and lower parts by an absorbent restricting plate 15 above the absorbent partitioning vessel 13. A valve mechanism 16 is provided at the center of the absorbing liquid limiting plate 15.

As shown in FIG. 2, the valve mechanism 16 is provided with a medium-concentration absorbing member in a cylindrical body 15a formed downward from a valve port 16a for vertically communicating substantially the center of the absorbing liquid restricting plate 15. The valve opening 16a is opened and closed by a floating valve element 17 floating with the absorbing liquid in the liquid separating cylinder 12. When the liquid level of the absorbing liquid in the medium concentration absorbing liquid separating cylinder 12 rises, the valve opening 16a is closed and the absorbing liquid is closed. When the liquid level falls, the valve port 16a is opened to communicate the upper and lower sides of the absorbing liquid restricting plate 15. Here, the valve port 16
The diameter of a is set to about 10 mm. In addition, the cylindrical body 15
In order to prevent the floating valve element 17 from coming off from the inside a, a baffle piece 19 is provided, and the gap between the cylindrical body 15a and the baffle piece 19 is made smaller than the diameter of the floating valve body 17.

A small opening 18 is formed in the absorbing liquid limiting plate 15 near the valve mechanism 16. This small opening 18
When the valve mechanism 16 closes the valve port 16a, the refrigerant vapor generated in the medium-concentration absorption liquid separation cylinder 12 is removed by the absorption liquid restriction plate 15
In this case, a hole having a diameter of about 1 mm is formed so as to be sufficiently smaller than the area of the valve port 16a of the valve mechanism 16 described above. . This small opening 18 allows the valve mechanism 1
When the valve 6 is closed, the excess pressure in the medium-concentration absorbing liquid separation cylinder 12 is released, and the pressing force of the refrigerant vapor is reduced toward the valve port 16a acting on the floating valve body 17 to reduce the medium-concentration absorbing liquid. When the level of the absorbing liquid in the separation cylinder 12 drops, the floating valve element 17 of the valve mechanism 16 can be smoothly opened by its own weight.

The heating tank 11 contains an absorber 3 to be described later.
The outflow portion of the low-concentration absorption liquid flow path L3 connected to is opened. In addition, an outlet of a heating-use absorbing liquid channel L4, which will be described later, is opened at a lower portion of the absorbing liquid partitioning container 13.

The low-temperature regenerator 2 is a vertical cylindrical low-temperature regenerator case 2 installed eccentrically on the outer periphery of the refrigerant recovery tank 10.
Has zero. The low-temperature regenerator case 20 is provided with a refrigerant vapor outlet 21 on the ceiling, and has a top connected to the inside of the side wall of the absorbent partitioning vessel 13 by a medium-concentration absorbent flow path L1.

The low-temperature regenerator case 20 is supplied with a medium-concentration absorbent through a heat exchanger H by a pressure difference, re-boils using the outer wall of the refrigerant recovery tank 10 as a heat source, and produces refrigerant vapor and high-concentration absorbent. And separated. On the outer periphery of the low-temperature regenerator case 20, a vertical cylindrical airtight evaporation / absorption case 30 is provided.
Are concentrically arranged, and the evaporating / absorbing case 30 is extended upward to form a condenser case 50. The upper part of the low-temperature regenerator case 20 serves as a gas-liquid separation part 22 and communicates with the inside of the condenser case 50 via the refrigerant vapor outlet 21 and the gap 5A.

The absorber 3 is provided with a cooling coil 31 wound in a vertical cylindrical shape inside an inner portion of the evaporating / absorbing case 30, and for spraying the high-concentration absorbing liquid to the cooling coil 31 above the cooling coil 31. Is attached. The absorber 3 is used during the cooling operation, and the cooling water for exhaust heat cooled by the cooling tower CT is circulated in the cooling coil 31.

The high concentration absorbent receiving portion 23 of the low temperature regenerator 2
Is connected to the high-concentration absorbent flow path L2 via the heat exchanger H.
It is connected to the high-concentration absorbent sprayer 32. The high-concentration absorbent is sprayed on the upper end of the cooling coil 31 and adheres to the surface of the cooling coil 31 to form a film. It flows down by the action. Bottom 33 of absorber 3 and heating tank 11
Are connected by a low-concentration absorbent flow path L3 to which a heat exchanger H and an absorbent pump P1 are attached.

The evaporator 4 is provided with a vertical cylindrical partition wall 40 having a communication port on the outer periphery of the cooling coil 31 in the evaporator / absorber case 30. A vertical cylindrical evaporation coil 41 through which water flows is provided,
A refrigerant liquid dispersing tool 42 is attached above it. The bottom 43 of the evaporator 4 communicates with the bottom of the medium-concentration absorption liquid separation cylinder 12 through a heating absorption liquid flow path L4 having a heating electromagnetic valve V1.

The refrigerant liquid sprayer 42 is used during the cooling operation, and causes the refrigerant liquid to drop on the evaporating coil 41. The dropped refrigerant wets the surface of the evaporating coil 41 by surface tension, becomes a film, and descends downward due to the action of gravity, and takes the vaporization heat from the evaporating coil 41 in the evaporating / absorbing case 30 at a low pressure. Then, the cooling and heating water for cooling and heating flowing in the evaporation coil 41 is cooled.

The condenser 5 is used at the time of cooling operation, and is provided with a cooling coil 51 in which cooling water for exhaust heat cooled by the cooling tower CT is circulated inside the condenser case 50. . The condenser case 50 communicates with the bottom of the refrigerant recovery tank 10 through the refrigerant flow path L5, and communicates with the low temperature regenerator 2 through the refrigerant vapor outlet 21 and the gap 5A. Is done.

The refrigerant supplied to the condenser case 50 is cooled by the cooling coil 51 and liquefied. The lower part of the condenser 5 and the refrigerant liquid dispersing device 42 installed above the evaporator coil 41 of the evaporator 4 communicate with each other through a refrigerant liquid supply path L6.
The liquefied refrigerant liquid is supplied to the refrigerant liquid sprayer 42 via the refrigerant cooler 52 provided in the refrigerant liquid supply path L6.

In this embodiment, the cooling coil 31 is connected to the cooling coil 51, and the cooling tower CT and the cooling water flow path 34
Connected by A cooling water pump P
2, the cooling water heated to a high temperature by absorbing heat in the cooling coil 31 and the cooling coil 51 is supplied to the cooling tower CT to form a heat discharge cycle in which the temperature of the cooling water is reduced to a low temperature.

During the cooling operation, the cooling water is supplied from the cooling tower CT to the cooling coil 31 to the cooling coil 5 by the cooling water pump P2.
1 → the cooling tower CT. The absorbing liquid is
It circulates in the order of high temperature regenerator 1 → low temperature regenerator 2 → absorber 3 → absorbent pump P1 → high temperature regenerator 1.

The indoor unit 200 has an air conditioning heat exchanger 44 and a blower 45. Both ends of the evaporating coil 41 are connected to the air-conditioning heat exchanger 44 through a cold / hot water flow path 46. The cold / hot water flow path 46 is provided with a cold / hot water pump P3.
Cold and hot water is circulated through the air conditioning heat exchanger 44.

During the heating operation, the heating electromagnetic valve V1 is opened and the absorption liquid pump P1 is operated. The high-temperature medium-concentration absorbing liquid flows into the evaporator 4 from the bottom 43. Evaporation coil 41
The cold and hot water inside is heated and supplied to the air conditioning heat exchanger 44 in the indoor unit 200 through the cold and hot water flow path 46 by the cold and hot water pump P3 to serve as a heat source for heating. The medium-concentration absorbent in the evaporator 4 enters the absorber 3 through the communication port of the partition wall 40, returns to the heating tank 11 by the absorbent pump P1 via the low-concentration absorbent flow path L3.

Since the user stops the air conditioning, the indoor unit 20
When the operation is stopped by the on / off switch of 0,
The absorption refrigeration apparatus 100 requires a dilution operation to prevent crystallization of the absorption liquid for a certain period of time even after the operation of the indoor unit 200 is stopped. Therefore, after stopping the combustion of the gas burner B, the absorption liquid pumps P1 and The cooling water pump P2 stops after the end of the dilution operation.

In the refrigerator main body 101 having the above-described configuration, the cold / hot water pump P3 for supplying and circulating the cold / hot water cooled or heated by the evaporating coil 41 of the evaporator 4 to the indoor unit 200 is provided with an absorbing liquid in the absorption cycle. Is configured as a tandem pump driven by the same motor together with the absorbent pump P1 that circulates water, and the absorbent pump P1 and the cold / hot water pump P3 always rotate at the same rotational speed.

Next, a control device 300 for controlling the absorption refrigeration system 100 will be described. Hereinafter, only the cooling operation will be described, and the heating operation will be omitted. Indoor unit 2
When a cooling operation is instructed by a remote controller (not shown) provided alongside 00, the heating electromagnetic valve V is closed, the tandem pump starts to be driven, and the absorbent pump P1 and the cold / hot water pump P3 are driven. . Then, after performing the ignition operation of the gas burner B, the combustion fan and the gas proportional valve are controlled according to the setting state of the remote controller, and the combustion amount of the gas burner B is controlled.

In controlling the combustion amount of the gas burner B, the indoor unit 2
1500 kcal / h to 48000 kca so that the temperature of the cold and hot water sent to the air conditioning heat exchanger 44 of 00 becomes 7 ° C.
Adjust the input of gas burner B between 1 / h.

The absorption refrigeration system 100 having the above configuration
In the above, when the absorbent circulates through the absorption cycle by the operation of the absorbent pump P1, the high temperature regenerator 1
The low-concentration absorbing liquid sent into the inside is heated in the heating tank 11, and the refrigerant is separated from the absorbing liquid as vapor to become a medium-concentration absorbing liquid.

In the high-temperature regenerator 1, a medium-concentration absorbent separating cylinder 12 extending above a heating tank 11 heated by a gas burner B is closed by an absorbent restricting plate 15 having a valve mechanism 16. On the other hand, when the liquid level of the absorbing liquid in the medium-concentration absorbing liquid separating cylinder 12 is low, the floating valve element 17 of the valve mechanism 16
6a is open. Therefore, the refrigerant vapor separated from the absorbing liquid passes through the valve mechanism 16 and moves into the refrigerant recovery tank 10. Further, the absorbing liquid having the medium concentration after the refrigerant is separated is supplied to the medium-concentration absorbing liquid separating cylinder 12 and the refrigerant recovery tank 1.
0, the medium concentration absorbent flow path L
1 is sent to the low-temperature regenerator 2.

The relative concentration of the refrigerant vapor in the medium-concentration absorption liquid separation cylinder 12 and the refrigerant recovery tank 10 and the absorption liquid sent into the high-temperature regenerator 1 by the absorption liquid pump P1 determine the medium-concentration absorption liquid separation cylinder. When the liquid level of the absorbing liquid in the cylinder 12 rises and the floating valve body 17 closes the valve port 16 a of the valve mechanism 16, the refrigerant vapor generated in the medium-concentration absorbing liquid separating cylinder 12 becomes small in the vicinity of the valve mechanism 16. It moves into the refrigerant recovery tank 10 little by little from the opening 18. At this time, the movement amount of the generated refrigerant vapor to the refrigerant recovery tank 10 is limited by the small opening 18, so that the pressure in the medium-concentration absorption liquid separation cylinder 12 increases and increases. Due to this pressure increase, a larger amount of the absorbing liquid in the medium-concentration absorbing liquid separation tube 12 is sent from the medium-concentration absorbing liquid flow path L1 to the low-temperature regenerator 2.

The liquid level of the absorbing liquid in the medium-concentration absorbing liquid separating cylinder 12 is determined by the amount of the absorbing liquid sent from the absorber 3 into the high-temperature regenerator 1 by the absorbing liquid pump P1, While the pressure of the refrigerant vapor in the balance 12 is in equilibrium, the pressure fluctuates with the liquid level of the absorbing liquid limiting plate 15 as an upper limit.

Here, when the liquid level drops from the valve mechanism 16, the pressing force of the refrigerant vapor acting on the floating valve body 17 to the valve port side is reduced, and when the liquid level of the absorbing liquid drops, When the buoyancy from the absorbing liquid is lost, the valve port of the valve mechanism 16 can be quickly opened by the weight of the floating valve body 17,
A large amount of refrigerant vapor can be promptly moved to the refrigerant recovery tank 10.

Therefore, the refrigerant vapor in the middle-concentration absorbent separation tube 12 does not leak from the middle-concentration absorption liquid passage L1 to the low-temperature regenerator 2, and the absorption liquid in the middle-concentration absorption liquid separation tube 12 is cooled by the refrigerant. Since it does not overflow into the recovery tank 10, the performance does not decrease, and a stable refrigerating capacity can be secured.

Further, in the operation in the absorption cycle, the rotation speed of the absorption liquid pump P1 was cooled by the temperature detected by the cold / hot water temperature sensor at the outlet side of the air conditioning heat exchanger 44 of the indoor unit 200 and the cooling tower CT. Since it is determined based on the cooling water temperature, an excessive amount of the absorbing liquid is not sent from the absorber 3 to the high-temperature regenerator 1, and a stable operation can be ensured according to the load. As a result, a stable refrigerating capacity can be ensured without a decrease in the refrigerating capacity due to a change in the liquid level of the absorbing liquid in the medium-concentration absorbing liquid separating cylinder 12.

In the above embodiment, the gas burner B is used as a heating source, but other heat sources such as an oil burner and an electric heater can be used instead of the gas burner B.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a cooling and heating device using an absorption refrigeration device.

FIG. 2 is a partial sectional view showing a valve mechanism in the absorption refrigeration apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Absorption refrigeration apparatus 1 High temperature regenerator 10 Refrigerant recovery tank (refrigerant recovery unit) 12 Medium concentration absorption liquid separation cylinder (extended container part) 16 Valve mechanism 17 Floating valve element 18 Small opening 2 Low temperature regenerator 3 Absorber 31 Cooling coil Reference Signs List 4 evaporator 41 evaporator coil 44 air conditioning heat exchanger 300 controller B gas burner (heating means) CT cooling tower P1 absorption liquid pump L1 medium concentration absorption liquid flow path (absorption liquid outflow pipe)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Norio Ueno, 4-1-2 Hiranocho, Chuo-ku, Osaka-shi F-term in Osaka Gas Co., Ltd. (Reference) 3L093 AA05 BB11 BB21 BB22 BB29 BB33 BB42 CC00 DD08 EE25 GG04 HH03 JJ04 LL03 MM02

Claims (2)

[Claims] In a regenerator heated by heating means, a low-concentration absorbent is separated into a high-concentration absorbent and a refrigerant, and an evaporator is provided on an evaporator coil through which cold and hot water as a heat medium for air conditioning flows. The refrigerant liquid is sprayed and evaporated to cool the cold and hot water, and in the absorber, the high-concentration absorbing liquid is sprayed on a cooling coil connected to a cooling tower and through which cooling water for exhaust heat flows. In the absorption refrigeration apparatus, which absorbs the evaporated refrigerant and returns the low-concentration absorbent, which has absorbed and reduced the concentration of the refrigerant, to the regenerator by an absorbent pump provided in a low-concentration absorbent flow path, An extension container portion is formed upward from a heating portion of the regenerator to be heated, and an opening of an absorption liquid outflow pipe through which the absorption liquid flows out is arranged at a lower portion of the extension container portion. Floating on the liquid surface To the floating valve body provided with a valve mechanism for opening and closing the valve port to the top of the extension container portion, the absorption refrigerating apparatus is characterized in that the refrigerant recovery section of the upper side of the valve mechanism. 2. The absorption refrigeration apparatus according to claim 1, wherein a small opening communicating with the refrigerant recovery section is formed at an upper portion of the extension container section separately from a valve port of the valve mechanism.