JPH11344270A - Absorption refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any trouble from being produced even in the case that a certain leakage is generated at a check valve in a low concentration absorbing liquid flow passage. SOLUTION: A low concentration absorbing liquid flow passage L3 for use in feeding absorbing liquid from an absorbing device 3 to a high temperature regenerator 1 is passed above an upper part of an enclosed wall-like container 110 of a heating tank 11, a flow outlet 112 is arranged at a lower part of the container and then a small hole 113 is formed near an inside part of the passing section of the low concentration absorbing liquid flow passage L3 for the enclosed wall-like container 110. In the case that a poor liquid-tight state is generated at a check valve arranged in the low concentration absorbing liquid flow passage L3, the absorbing liquid in the high temperature regenerator 1 is flowed in a reverse direction from the low concentration absorbing liquid flow passage L3 toward the absorbing device 3 up to a liquid level above the small hole 113 due to a difference between a pressure within the high temperature regenerator 1 and a pressure within the absorbing device 3 after stopping of the operation. However, as the liquid level is lowered down to the small hole 113 to cause the small hole 113 to be released, a gaseous component such as refrigerant vapor or the like is sucked through the small hole 113, resulting in that the absorbing liquid is not sucked through the flow outlet 112, but the absorbing liquid is positively left at a location below the small hole 113 in the enclosed wall-like container 110 and the heating tank 11 is not heated under no load.

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 solution, and in particular, a heated part of a regenerator heated by a heating means is heated by a heating means. Having a substantially inverted bowl-shaped container portion that covers the heat generating portion from above.

[0002]

2. Description of the Related Art Conventionally, for example, in an absorption type air conditioner using an absorption type air conditioner 100 shown in FIG. 5, in an absorption cycle in which a high-temperature regenerator 1 is heated and an absorption liquid pump P1 is operated, the inside of an evaporator 4 is removed. Using the water cooled by the cold / hot water pipe (evaporation coil 41) as a cooling source, the water is supplied to the indoor heat exchanger (air-conditioning heat exchanger 44) of the indoor unit 200, and the indoor heat exchanger (air-conditioning heat exchanger) is used. 44), the convection fan (blower 4
5) is activated to cool the room. Further, the absorbent pump 1 is operated in a state where the evaporator 4 is communicated with the high-temperature regenerator 1 through the heating absorbent flow path L4, and the high-temperature absorbent heated by the high-temperature regenerator 1 is sent to the evaporator 4. By supplying the water, the water is heated by a cold / hot water pipe (evaporation coil 41) in the evaporator 4 to serve as a heating source, and is similarly supplied to an indoor heat exchanger (air conditioning heat exchanger 44) to perform a heating operation. .

[0003] The absorption type air conditioner 10 constructed as described above.
In FIG. 3, in order to save energy, the amount of heat generated by a heating means such as a gas burner B for heating the high-temperature regenerator 1 is suppressed, and the heat generated by the heating means is efficiently absorbed by the regenerator. As shown in the figure, the heating tank 11 as a heated portion of the high-temperature regenerator 1 is formed in a substantially inverted bowl shape formed so as to cover the combustion flame of the gas burner B, and a low-concentration absorbing liquid is supplied from the absorber 3. Is opened near the lower end of the heating tank 11 so that the absorber 3 communicates with the heating tank 11 of the high-temperature regenerator 1 via the absorbing liquid pump P1. . As a result, the low-concentration absorbent supplied into the high-temperature regenerator 1 flows into the heating tank 11 near the lower end of the heating tank 11 and forms a flow from below to above the heating tank 11 to form a high-temperature regenerator. It is heated while being dispersed into one.

Further, in the conventional absorption refrigeration system 100 having the above configuration, the pressure on the high temperature regenerator 1 (heating tank 11) side is high and the pressure on the absorber 3 side is low. The low-concentration absorbent flow path L3 provided with the absorbent pump P1 for supplying the low-concentration absorbent to the high-temperature regenerator 1 from the high-temperature regenerator 1 due to the pressure difference between the high-temperature regenerator 1 and the absorber 3 A check valve G is provided to prevent the absorbent in the vessel 1 from flowing back into the absorber 3.

[0005]

In the above-mentioned absorption refrigeration system, the check valve G provided in the low concentration absorbent flow path L3 is provided.
However, if leakage occurs for some reason, the absorption liquid in the high-temperature regenerator 1 flows back to the absorber 3 due to the pressure difference after the operation of the absorption refrigeration system in which the absorption liquid pump P1 is stopped. In this case, the low concentration absorbent flow path L3 is
Due to the opening at the lower part of the inside, the absorbing liquid in the high-temperature regenerator 1 almost flows back to the absorber 3, and the inside of the high-temperature regenerator 1 becomes empty. When the operation is started in such a state, the high-temperature regenerator 1
The inside becomes an empty-fired state, and the thermistor TH is not immersed in the absorbing liquid in the high-temperature regenerator 1, so that the high-temperature state in the high-temperature regenerator 1 cannot be detected. As a result, the inside of the high-temperature regenerator 1 becomes abnormally high temperature, generating hydrogen gas and crystallization of the absorbing solution. When the degree of vacuum in the absorption cycle is reduced by the generated hydrogen gas, the absorption cycle does not function. There is a problem that trouble occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent backflow in a low-concentration absorbent flow path in an absorption refrigeration system having a heating tank in a regenerator, thereby preventing troubles in operation of the absorption refrigeration system.

[0007]

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. The refrigerant liquid is sprayed and evaporated on the evaporating coil through which the cold and hot water flows as a heat medium for cooling, and the cold and hot water is cooled. In the absorber, the cooling water for exhaust heat flows while being connected to the cooling tower in the absorber. The regenerator is sprayed with the high-concentration absorbing liquid in the cooling coil to absorb the evaporated refrigerant, and the low-concentration absorbing liquid that has absorbed and reduced the concentration of the refrigerant is provided in the low-concentration absorbing liquid flow path by the absorbent pump. In the absorbent refrigerating apparatus, the pipe of the low concentration absorbent flow path for returning the low concentration absorbent from the absorber to the regenerator by the absorbent pump is heated by the heating means. Addition of Wherein is lowered from above the part with communicating with the bottom of the heated portion, and the low concentration absorption solution flow path located above the height of the top and upper portions of the heated portion,
It is characterized by communicating through a small hole.

According to a second aspect of the present invention, in the absorption liquid refrigerating apparatus of the first aspect, the heated portion of the regenerator heated by the heating means is a surrounding wall-shaped container surrounding the heat generating portion of the heating means and the surrounding wall. And a closing wall for closing the inner wall of the container at the upper end to form a substantially inverted bowl shape that covers the heat generating portion from above, and for returning the low-concentration absorbent from the absorber to the regenerator by the absorbent pump. Pipe the low-concentration absorbent flow path
Insert through the upper part of the surrounding wall-shaped container into the heated part of the regenerator, open its tip at the lower part of the surrounding wall-shaped container, and in the low concentration absorbent liquid pipe, A small hole is formed in the vicinity of the inside of the penetrating portion with the surrounding wall-shaped container to communicate the inside and outside of the pipe.

[0009]

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. The pipe of the low-concentration absorbent flow path for returning the low-concentration absorbent is lowered from above the heated part of the regenerator heated by the heating means and communicates with the lower part of the heated part. And the low-concentration absorbent flow path located at the height of the upper part are communicated via small holes. Although the upper part of the heated part of the regenerator communicates with the pipe of the low-concentration absorbent flow path, since it is a small hole, it passes through the low-concentration absorbent flow path by the absorbent pump and is fed into the regenerator. Most of the absorbed liquid flows into the heated portion from the communicating portion below the heated portion. Therefore, the absorbing liquid flowing into the heated portion flows into the regenerator while rising from the lower portion to the upper portion of the heated portion. During that time, the absorbing solution is heated by the heat of the heating means, and the temperature of the absorbing solution increases. I do.

[0010] Similarly, in the second aspect, the low-concentration absorbing liquid having a low concentration by absorbing the refrigerant in the absorber is sent into the regenerator by the absorbing liquid pump. In the regenerator, a pipe of a low-concentration absorbing solution flow path for returning the low-concentration absorbing solution is penetrated from the upper portion of the surrounding wall-shaped container and inserted into the heated portion of the regenerator, and the tip of the pipe is inserted into the surrounding wall-shaped container. It is open at the bottom. A small hole is formed in the pipe of the low-concentration absorbent flow path near the inside of the penetrating portion with the surrounding wall-shaped container. Most of the absorbing liquid that passes through and is sent into the regenerator flows into the heated portion from the lower opening in the surrounding wall-shaped container. Therefore, the absorbing liquid flowing into the heated portion flows into the regenerator while rising from the lower part to the upper part of the surrounding wall-shaped container surrounding the heating means, and during that time, the absorbing liquid is heated by the heat of the heating means. And the temperature of the absorbing solution rises.

In the absorption refrigeration system of the present invention configured as described above, the check valve provided in the low-concentration absorbent flow path for supplying the low-concentration absorbent from the absorber into the regenerator includes:
If a leak occurs, after the operation of the absorption refrigeration system in which the absorption liquid pump is stopped, the pressure difference between the pressure in the regenerator and the pressure in the absorber causes the absorption liquid in the regenerator to flow in the absorber. Backflow to In this case, since the low-concentration absorbent flow path that connects the regenerator and the absorber communicates with the upper part of the regenerator through the small hole, the absorbent in the heated portion (enclosed wall-shaped container) can be used. ,
The gas flows back to the absorber while it is above the small holes. However, when the level of the absorbing liquid in the heated portion (enclosed wall-shaped container) drops to the small holes, the gas such as refrigerant vapor in the regenerator Since the components are sucked into the low-concentration absorbent channel from the small holes, the absorbent in the heated part (enclosed wall-shaped container) is not sucked into the low-concentration absorbent channel from the lower opening. Backflow from the opening into the low-concentration absorbent flow channel stops.

Therefore, even if an abnormality occurs in the check valve provided in the low-concentration absorbing liquid flow path, the lower part of the low-concentration absorbing liquid flow path is located below the position of the small hole in the low-concentration absorbing liquid flow path. Absorbing liquid always exists in the heated portion (enclosed wall-shaped container).
As a result, when the operation is started thereafter, the regenerator does not go into an empty-fired state by the heating means, does not generate hydrogen gas or crystallize due to overheating, and does not hinder the operation.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an air conditioner, which is provided with an absorption refrigeration system 100 comprising a refrigerator main body 101 and a cooling tower (cooling tower) CT as an outdoor unit.
An indoor unit 200 is provided. 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. An absorber 3 and an evaporator 4 are provided on the outer periphery of the low-temperature regenerator 2, and a condenser 5 is provided above the evaporator 4.

The high-temperature regenerator 1 is heated by the gas burner B, and is a heated tank 11 which is a heated portion for boiling the low-concentration absorbing liquid therein, and extends upward from the top of the heated tank 11 to form refrigerant vapor. Medium-concentration absorption liquid separation cylinder 12 for separating the medium-concentration absorption liquid concentrated by evaporation of the refrigerant vapor.
And A vertical cylindrical airtight refrigerant recovery tank 10 for recovering refrigerant vapor
Is provided.

The heating tank 11 includes an inner wall 110a, an outer wall 110b, and a bottom wall 1 so as to surround the combustion flame of the gas burner B.
10c, a surrounding wall-shaped container 110 formed hollow from;
A closing wall 111 extending from the upper end of the inner wall 110a toward the center and closing the inner peripheral edge of the surrounding wall-shaped container 110
And the upper part of the combustion space of the gas burner B is closed.

As shown in FIG. 2, a low-concentration absorbent flow path L3 connected to an absorber 3 to be described later is provided through the upper part of the heating tank 11, and the low-concentration absorbent flow path L3
The outlet 112 at the tip of the container is open at the lower part in the surrounding wall-shaped container 110. In the low-concentration absorbent flow path L3 penetrating through the heating tank 11, a small hole 113 (for example, φ2 mm) smaller than the opening area of the outlet 112 is provided immediately inside the penetrating portion with the heating tank 11. The inside and the outside of the low-concentration absorbent flow path L3 are communicated by the small holes 113. The small hole 113 is formed at a position higher than the detecting part of the absorbing liquid thermistor 114 so that the absorbing liquid thermistor 114 for detecting the temperature of the absorbing liquid in the heating tank 11 can surely detect the temperature of the absorbing liquid. ing.

The small hole 113 is provided in the high temperature regenerator 1 when a check valve (not shown) provided in the low concentration absorbent flow path L3 provided with the absorbent pump P3 is defective. When the absorbent in the high-temperature regenerator 1 flows back into the absorber 3 due to the difference between the pressure in the high-temperature regenerator 1 and the pressure in the absorber 3, the absorbent in the high-temperature regenerator 1 (enclosed wall-shaped container 110) When the liquid level is higher than the small hole 113, when the liquid level is higher than the small hole 113, when the liquid tightness is generated in the check valve G, it is formed so as not to be empty. Since the small holes 113 are closed by the absorbing solution, the absorbing solution in the high-temperature regenerator 1 flows back to the absorber 3 through the low-concentration absorbing solution channel L3. Then, the level of the absorbing liquid in the high-temperature regenerator 1
13, the small hole 113 is opened, and a gas component such as refrigerant vapor in the high-temperature regenerator 1 is sucked from the small hole 113 into the low-concentration absorbent L3. The absorbing liquid in the liquid is not sucked from the outflow portion 112 into the low concentration absorbing liquid flow path L3. Therefore, the absorbing liquid can be reliably left below the position of the small hole 113 in the high-temperature regenerator 1.

The small hole 113 is provided in the low concentration absorbent flow path L3.
Is formed with a small hole diameter in the tube wall of the member forming the above, the absorbent flowing into the heating tank 11 through the low-concentration absorbent flow path L3 from the absorber 3 side during normal operation is Most of the time, from the outlet 112 to the heating tank 11
The amount of absorbing liquid flowing into the heating tank 11 through the small holes 113 and short-circuiting into the heating tank 11 is not large. Therefore, the low-concentration absorbent supplied from the absorber 3 through the low-concentration absorbent flow path L3 to which the absorbent pump P1 is attached is supplied to the outlet 112.
Of the surrounding wall-like container 1
While moving from the lower part to the upper part of 10, it flows into the heating tank 11. During this time, the low-concentration absorbing liquid is efficiently heated while facing the inner wall 110a and the outer wall 110b of the surrounding wall-shaped container 110.

The surfaces of the inner wall 110a and the outer wall 110b of the surrounding wall-like container 110 are provided with heat absorbing fins 115 for efficiently absorbing the heat generated by the gas burner B.

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 bottom 121 of the medium-concentration absorbent separation tube 12 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 a 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 extends upward to form a condenser case 50.

Refrigerant recovery tank 10, low temperature regenerator case 2
0, the evaporation / absorption case 30 is integrally welded to the bottom plate 13 to form the refrigerator main body 101. 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 through 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
Is connected to a heat exchanger H and a low-concentration absorbent flow path L3 equipped with an absorbent pump P1.

The evaporator 4 is provided with a vertical cylindrical partition wall 40 having a communication port around 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 part 43 of the evaporator 4 is connected to the bottom part 121 of the medium-concentration absorption liquid separation tube 12 by a heating absorption liquid flow path L4 having a heating solenoid valve V1.
Is in communication with

The coolant sprayer 42 is used during the cooling operation, and drops coolant 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 during a cooling operation, and has a cooling coil 51 in which cooling water for exhaust heat circulated in the cooling tower CT is circulated inside the condenser case 50. . The condenser case 50 communicates with the bottom portion 14 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. Supplied.

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 disperser 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 through 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 an exhaust heat cycle in which the cooling water is radiated to the atmosphere and cooled 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

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 4 by a cold / hot water flow path 46 formed by a rubber hose or the like.
4. The cold / hot water flow path 46 is provided with a cold / hot water pump P3 for circulating cold / hot water 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 absorbing liquid in the evaporator 4 enters the absorber 3 through the communication port of the partition wall 40, passes through the low-concentration absorbing liquid flow path L3, and is returned to the heating tank 11 by the absorbing liquid pump P1.

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 the combustion of the gas burner B is stopped, the absorption liquid pumps P1 and P1 The cooling water pump P2 stops after the end of the dilution operation.

The absorption refrigeration system 100 having the above configuration
When the gas burner B burns, the absorption gas in the heating tank 11 is heated by the combustion gas, the absorption liquid pump P1 is driven, and the absorption liquid circulates in the absorption cycle.
Accordingly, the refrigerant vapor also circulates. Even after the combustion of the gas burner B is stopped by an instruction to stop the operation, a predetermined dilution operation is performed, and the absorbent pump P1 is continuously driven,
When the detected temperature of the absorbing liquid thermistor 115 decreases to a predetermined temperature, the operation of the absorbing liquid pump P1 is also stopped and the operation is terminated.

In the absorption cycle, for some reason,
In the check valve provided in the low concentration absorbent flow path L3 for supplying the low concentration absorbent from the absorber 3 into the high temperature regenerator 1,
If a leak occurs, after the operation of the absorption refrigeration system 100 is completed, the absorption liquid in the high-temperature regenerator 1 is absorbed by the absorber 3 due to the pressure difference between the pressure in the high-temperature regenerator 1 and the pressure in the absorber 3. Backflow into the inside. In this case, the surrounding wall-shaped vessel 110 is provided in the low-concentration absorbent flow path L3 that connects the high-temperature regenerator 1 and the absorber 3.
A small hole 113 communicating the inside and outside is formed near the inside of the penetrating portion with the surrounding wall-shaped container 110 in the low-concentration absorbing liquid flow path L3 penetrated at the upper part of the container. While the liquid level is above the small holes 113, the liquid flows backward to the absorber 3. However, when the liquid level of the absorbing liquid in the surrounding wall-shaped container 110 falls to the small holes 113, the high-temperature regenerator 1 Is absorbed into the low-concentration absorbent flow path L3 from the small holes 113, so that the absorbent in the surrounding wall-shaped vessel 110 flows through the low-concentration absorbent flow path from the outlet 112 opened at the bottom. It is not sucked into L3 and the outlet 11
Backflow from 2 into the low concentration absorbent flow path L3 stops.

Therefore, even if an abnormality occurs in the check valve provided in the low concentration absorbent flow path L 3, the low concentration absorbent flow Road L
Absorbent liquid always exists below the position of the small hole 113 of FIG. As a result, when the operation is subsequently started,
The heating tank 11 of the high-temperature regenerator 1 will not be put into an empty-fired state by the gas burner B, and neither generation of hydrogen gas nor crystallization due to overheating will occur, and operation will not be hindered.

FIG. 3 shows a first modification of the present invention. In the first modification, the low-concentration absorbent flow path L3 is not penetrated at the upper portion of the heating tank 11, but is disposed outside the surrounding wall-shaped container 110 from above to below. The opening is connected at the lower part of the surrounding wall-shaped container 110.
A small-diameter pipe 116 is provided between the pipe of the low-concentration absorbent flow path L3 and the upper part of the surrounding wall-shaped container 110 so as to communicate with each other through the small-diameter hole.

FIG. 4 shows a second modification of the present invention. In the second modification, the heating tank 11 does not use a substantially inverted bowl-shaped surrounding wall-shaped container, but uses a simple container-shaped container. Here, similarly to the first modification, the low-concentration absorbent flow path L
The third pipe is disposed outside the heating tank 11 from the upper side to the lower side, and the front end opening of the low concentration absorbent flow path L3 is connected to the lower part of the surrounding wall-shaped container 110. A small-diameter pipe 116 is provided between the pipe of the low-concentration absorbent flow path L3 and the upper part of the surrounding wall-shaped container 110 so as to communicate with each other through the small-diameter hole.

In the above embodiment, the heating source is
Instead of the gas burner B, another heat source such as an electric heater can be used.

[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 gas burner and a heating tank of the absorption refrigeration system.

FIG. 3 is a partial cross-sectional view showing a connection state between a heating tank and a low-concentration absorbing liquid channel according to a first modification.

FIG. 4 is a partial cross-sectional view showing a connection state between a heating tank and a low-concentration absorbing liquid channel according to a second modification.

FIG. 5 is a conceptual diagram of a cooling and heating device using a conventional absorption refrigeration device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Absorption refrigeration apparatus 1 High temperature regenerator 11 Heating tank (heated portion) 110 Surrounding wall-shaped container 111 Closing wall 112 Outlet (opening) 113 Small hole 3 Absorber 31 Cooling coil 4 Evaporator 41 Evaporation coil B Gas burner (Heating Means) CT cooling tower P1 Absorbent pump L3 Low concentration absorbent flow path

Claims (2)

[Claims] In a regenerator heated by a heating means, a low-concentration absorbent is separated into a high-concentration absorbent and a refrigerant. In an evaporator, a refrigerant flows into an evaporator coil through which cold and hot water flows as a heating medium for air conditioning. Spraying the liquid and evaporating it and cooling the cold and hot water, the absorber is connected to a cooling tower, and the high-concentration absorbing liquid is sprayed on a cooling coil through which cooling water for exhaust heat flows. In the absorbent refrigerating apparatus, which absorbs the evaporated refrigerant and returns the low-concentration absorbent, which has absorbed the refrigerant and reduced in concentration, to the regenerator by the absorbent pump provided in the low-concentration absorbent flow path, The pipe of the low-concentration absorbing liquid flow path for returning the low-concentration absorbing liquid from the absorber to the regenerator is lowered from above a heated portion of the regenerator heated by the heating means to thereby be heated. Under the department In conjunction with communicating, the and said low concentration absorption solution flow path located at a height of the upper and upper portion of the heating unit, the absorption refrigerating apparatus is characterized in that communicates through a small hole. 2. The absorption liquid refrigerating apparatus according to claim 1, wherein the heated portion of the regenerator heated by the heating means is a surrounding wall-shaped container surrounding the heat-generating portion of the heating means and a surrounding wall-shaped container. Forming a substantially inverted bowl shape that covers the heat generating portion from above with a closing wall that closes an inner wall at an upper end; and the low-concentration absorption for returning the low-concentration absorption liquid from the absorber to the regenerator by the absorption liquid pump. A pipe for the liquid flow path is inserted through the upper part of the surrounding wall-shaped container into the heated part of the regenerator, and the tip thereof is opened at the lower part of the surrounding wall-shaped container. An absorption refrigeration system, characterized in that a small hole is formed in the pipe of the passage near the inside of the penetrating portion with the surrounding wall-shaped container to communicate the inside and outside of the pipe.