JP2541830B2 - High temperature generator of absorption chiller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a high temperature generator of an absorption chiller-heater, and more particularly to a high temperature generator of an absorption chiller-heater having high thermal efficiency.

<Prior Art> Generally, a high temperature generator of an absorption chiller-heater has a combustion chamber equipped with a burner in a hollow portion provided in a heating tank, and the combustion chamber is connected to an exhaust stack via a flue portion. It is in communication.
Further, the heating tank is connected to the separator via a pumping pipe. Then, the rare absorption liquid that has absorbed the refrigerant vapor that has flowed into the heating tank is heated and boiled by the burner, and the rare absorption liquid that has boiled flows into the separator through the lift pipe as a gas-liquid mixed liquid, and the separator The refrigerant vapor and the absorbing liquid having an intermediate concentration are separated by the refrigerant (for cold, see JP-A-61-130758).

<Problems to be Solved by the Invention> However, since the can body of the absorption chiller-heater having such a conventional structure is directly heated, a large amount of heat is required to heat and boil the absorbing liquid. There was a problem.

Therefore, in order to improve the heat collection efficiency, it is necessary to increase the heat transfer area, which causes a problem that the device becomes large.

<Means for Solving Problems> The present invention has been made to solve the above problems, and includes a heating tank, a combustion chamber, and a separator connected to the heating tank via a pumping pipe. In the high temperature generator of the absorption chiller-heater, the heating tank comprises a high temperature tank and an intermediate temperature tank which are in communication with each other, the intermediate temperature tank has a hollow portion, the hollow portion is smoke. Surround the high temperature tank through the road,
In the flue portion, a far-infrared radiator is provided so as to surround the high-temperature tank, an inner flue portion is formed between the far-infrared radiator and the high-temperature tank, and the far-infrared radiator and the A high temperature generator for an absorption chiller-heater, wherein an outer flue portion communicating with the inner flue portion is formed between the medium temperature tank and at least one of the high temperature tank and the medium temperature tank is provided with a stirring means.

<Operation> The present invention is configured as described above and includes a flue portion provided in a bay shape between the high temperature tank and the intermediate temperature tank.
As the heat transfer area is increased, the far-infrared radiator arranged in the flue portion radiates far-infrared rays to serve as a heat source, and promotes heating of the high temperature tank and the intermediate temperature tank together with the combustion gas in the combustion chamber.

Further, the absorbing solution in the tank is agitated by the agitating means provided in at least one of the high temperature tank and the medium temperature tank to promote heat transfer in the absorbing solution.

<Embodiment Cooling> An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 4 is a schematic configuration explanatory view of an absorption chiller-heater equipped with the high temperature generator of the present invention. This absorption chiller
A high temperature generator 1, a low-temperature generator 51 and a generation susceptor 50 composed of a susceptor 52, an evaporation absorber 55 composed of an evaporator 56 and an absorber 57, and low-temperature and high-temperature heat exchangers 60, 61. , Bubble pump 6
2. It is composed of the absorption liquid pump 63 and the like. And
These are a steam can 70 through which the refrigerant flows, pipelines 71, 72, 73, a pipeline 75 through which the refrigerant liquid flows down, pipelines 77 and 78 through which the refrigerant liquid circulates, and pipelines 80, 81, 82 through which the absorption liquid is sent. 83, pipe 85 through which absorption liquid flows,
86, 87, 88 are connected to form a circulation path for the refrigerant (water) and the absorbing liquid (lithium bromide aqueous solution) similar to the conventional absorption chiller-heater. The heat recovery unit 65 recovers the heat of the refrigerant into the absorption liquid, and is provided in the absorption liquid bypass line 89. Further, the trap 46 is connected between the separator 40 and the low temperature generator 51 by an overflow pipe 45. Furthermore,
The pipe line 47 connects the separator 40 and the evaporation absorber 55, and a cold / heat switching valve 48 is provided in the middle thereof. In addition, the automatic bleeding device 67 is connected to the ducts 90, 91, and 92, respectively, and the suspected gas tank
68, the absorber 57, and the absorbing liquid reservoir 55a are connected to each other, and configured to discharge the doubtful gas or air in the main body from the palladium cell 69 to the outside of the machine via the doubtful gas tank 68. .

Next, the high temperature generator 1 will be described with reference to FIGS. 1 to 3.

The high temperature generator 1 is composed of a heating layer 6 and a combustion chamber 12 provided in the lower part of the box body 2, and a separator 40 provided in the upper part. And in the lower half of the box body 2, the air supply port
In addition to having 4a, an air supply path 4 is formed so as to surround the box body 2, and the outer side of the upper half of the box body 2 has a heat insulating wall 3
Covered with.

The heating tank 6 is composed of a high temperature tank 7 and an intermediate tank 8. The high temperature tank 7 is formed in a cylindrical shape with a bottom in the embodiment and is arranged in the lower central portion of the box body 2. Further, the medium temperature tank 8 is formed in a bottomed cylindrical shape having a hollow portion, is arranged coaxially with the high temperature tank 7, and its inner wall is arranged so as to surround the outer wall of the high temperature tank 7 at a predetermined distance. It is set up. Further, between the high temperature tank 7 and the medium temperature tank 8, a flue portion 10 whose lower part is opened and whose upper part is closed is formed. Further, the high temperature tank 7 and the medium temperature tank 8 are communicated with each other by a communication pipe 9 at their bottom portions,
The middle temperature tank 8 is connected to the high temperature heat exchanger 61 by an inflow pipe 83, and is formed so that the rare absorption liquid that has absorbed the refrigerant vapor flows therein.

Further, a plurality of ultrasonic vibrators 30 as a stirring means are provided at the bottom of the medium temperature tank 7. This ultrasonic transducer 30
Is made of PZT ceramics in the embodiment, and is arranged with its sound wave emitting surface facing upward. Then, in the embodiment, driven by the ultrasonic oscillator 31 having an output of 200 W,
The ultrasonic vibration having a frequency of 20 KHZ is transmitted to the rare absorption liquid in the medium temperature tank 8.

The combustion chamber 12 is provided below the high temperature tank 7 and is connected to a gas supply pipe 21 via a conduit 17 and a valve 18, and a main burner 13 via a conduit 19 and a valve 20 to a gas supply pipe 21. Connected pilot burner 14, anti-stop thermostat 15,
It consists of a spark igniter 16. Then, while taking in air from the air supply passage 4 through the blower 23, it is surrounded by the far-infrared radiator 25 to heat the lower part of the high temperature tank 7 and the far-infrared radiator 25, and at the same time, the combustion gas is flue portion. Formed to send to 10.

The far-infrared radiator 25 is formed of zirconia ceramics ZrO ₂ into a stepped cylindrical shape in the embodiment, and the upper part thereof surrounds the outer wall of the high temperature tank 7 at a predetermined interval, and the flue part 10 is left and right. It is arranged so as to be divided into two. As a result, the combustion chamber 12 is provided between the high temperature tank 7 and the far infrared radiator 25.
The inner flue portion 10a communicating with the inner flue portion 10a is formed between the intermediate temperature tank 8 and the far-infrared radiator 25. The outer flue portion 10b communicates with an exhaust pipe 39 through an outer smoke portion 37 formed between the intermediate temperature tank 8 and the box body 2, and a damper 38 is provided at a lower end portion of the outer smoke portion 37. It is provided.

Further, the outer wall of the intermediate temperature tank 8 is connected to the separator 40 by a pumping pipe 35 which is formed in the shape of a funnel which is upwardly tapered, and the inner wall of the intermediate temperature tank 8 is upward. It is connected to the separator 40 by means of a funnel-shaped partition wall 36 which is once tapered. As a result, the partition wall 36 includes the high temperature tank 7 and the separator 40.
Forming a first pumping pipe 35a communicating with the pumping pipe 35 and the partition wall 3
A second pumping pipe 35b that connects the intermediate tank 8 and the separator 40 is formed between the second pumping pipe 35b and the separator 6. Incidentally, 36a is a guide plate which is provided at the upper end of the partition wall 36 and guides the gas-liquid mixed liquid from the second pumping pipe 35b to the side.

The separator 40 has a circular tank shape in the embodiment, and an inflow chamber 41 in which the first and second pumping pipes 35a and 35b are opened in the center thereof.
Are formed. In addition, a partition plate is provided in the upper part of the separator 40.
A vapor chamber 44 divided into 43 is formed, and the absorption liquid chamber is located in the lower part.
42 is formed. Then, the first and second pumping lines 35a, 35b
The gas-liquid mixed liquid that has flowed into the separator 40 via is separated into gas and liquid in the inflow chamber 41, the refrigerant vapor is introduced into the vapor chamber 44, and the intermediate concentration absorption liquid from which the refrigerant vapor is separated is introduced into the absorption liquid chamber 42. To be done. Further, a steam pipe 70 is connected to the steam chamber 44, and is formed so as to allow the separated refrigerant steam to flow to the low temperature generator 51. Further, a liquid feed pipe 85 is connected to the bottom surface of the absorbent chamber 42, and is formed so as to deliver the separated intermediate concentration absorbent to the low temperature generator 51 via the heat exchanger 61. . Further, the absorption liquid chamber 42 is provided with an overflow pipe 45 opening to the liquid level thereof, and the overflow pipe 45 is connected to a low temperature generator 51 via a trap 46. Further, the lower end of the pipe diameter of the pipe line 47 is connected to the side wall of the inflow chamber 41 by opening at a height position slightly lower than the liquid surface of the absorbing liquid chamber 42.

Next, the operation of the high temperature generator of the absorption chiller-heater configured as described above will be described.

The rare absorption liquid that has absorbed the refrigerant vapor flowing out from the high temperature heat exchanger 61 flows into the intermediate temperature tank 8 through the inflow pipe 83, and further flows into the high temperature tank 7 through the communication pipe 9. Meanwhile, the combustion chamber 12
The main burner 13 is ignited by the spark igniter 16 and the pilot burner 14 and once emits a flame upward,
The bottom of the high temperature tank 7 and the far infrared radiator 25 are heated. As a result, the far-infrared radiator 25 once radiates and heats far-infrared rays toward the high temperature tank 7 and the intermediate temperature tank 8, and the high-temperature combustion gas generated in the combustion chamber 12 passes through the inner flue portion 10a and the outer flue portion. It enters the portion 10b and reaches the outside smoke portion 37 via the bottom portion of the intermediate temperature tank 8.

At this time, in the high temperature tank 7, the rare absorption liquid is heated and boiled to form a gas-liquid two-phase flow and rise in the first pumping passage 35a,
It flows into the inflow chamber 41 of the separator 40. Further, in the medium temperature tank 8, while the rare absorption liquid is heated by the steam heat source,
A stirring flow is generated in the rare absorption liquid by the ultrasonic oscillator 30, whereby heat transfer is promoted in the rare series liquid and the liquid is boiled. In the examples, the heat transfer of the rare absorption liquid was increased by about 10% in terms of the thermal efficiency ratio by the irradiation of ultrasonic waves. As a result, the rare series liquid in the medium temperature tank 8 becomes a gas-liquid two-phase flow, rises in the second pumping passage 35b, and flows into the inflow chamber 41 of the separator 40. And the first and second
The liquid-liquid mixture that has flown into the inflow chamber 41 from the upper ends of the pumping paths 35a and 35b in the discharge state has its refrigerant vapor in the upper vapor chamber 44,
The intermediate-concentration absorption liquid from which the refrigerant vapor has been separated is accumulated in the absorption liquid chamber 42 to be in a gas-liquid separated state. Further, the intermediate concentration absorption liquid in the absorption liquid chamber 42 flows into the high temperature heat exchanger 61 via the liquid supply pipe 85, and the refrigerant vapor in the steam chamber 44 flows into the low temperature generator 51 via the steam pipe 70. . Further, when the intermediate concentration absorbent in the absorbent chamber 42 is increased, the intermediate concentration absorbent is overflowed by the overflow pipe 45, and the liquid level in the absorbent chamber 42 is kept substantially constant. Furthermore,
During the cooling cycle, the passage through the pipe line 47 has a cold / hot switching valve 48.
Is closed, the cold temperature switching valve 48 is opened during the heating cycle, and the intermediate concentration absorption liquid is introduced into the evaporation absorption pipe 55.

The present invention is not limited to the above description and illustrated examples, and its embodiment can be modified without departing from the technical idea of the present invention. For example, the ultrasonic transducer 30 may be equipped with a horn.

Further, the far-infrared radiator 25 may be a metal cylinder with thermal spray coating of ceramics.

Furthermore, even if the lower end of the partition wall 36 and the upper end of the intermediate temperature tank 6 are not in close contact with each other, substantially the same action and effect are exhibited.

<Effects of the Invention> The high temperature generator of the absorption chiller-heater of the present invention has the above-mentioned configuration, and includes the flue portion formed in a bay shape between the high temperature tank and the intermediate temperature tank. The heat transfer area can be increased without increasing the size of the heating tank.

In addition, high heat efficiency can be improved by promoting heating of the far infrared radiator in the flue portion by far infrared radiation and promotion of heat transfer by stirring the absorbing solution by the stirring means.

Therefore, the device having high thermal efficiency can be configured in a small size, and the rise time of the high temperature generator can be shortened.

Further, such a high temperature generator can be simply constructed, the exhaust gas temperature can be lowered, and lower heat generation can be improved.

[Brief description of drawings]

FIG. 1 is a front sectional view of a high temperature generator of an absorption chiller-heater according to an embodiment of the present invention, and FIG.
FIG. 4 is a plan sectional view of the separator, and FIG. 4 is a schematic configuration explanatory view of an absorption chiller-heater equipped with the high temperature generator of the present invention. 1 ... High temperature generator, 6 ... Heating tank, 7 ... High temperature tank, 8 ... Medium temperature tank, 10 ... Flue section, 10a ... Inner flue section, 10b ... Outer flue section, 12 ... … Combustion chamber, 25 …… Far infrared radiator, 30 …… Ultrasonic transducer (stirring means).

Claims (1)

(57) [Claims] 1. A high temperature generator of an absorption chiller-heater, comprising: a heating tank, a combustion chamber, and a separator connected to the heating tank via a pumping pipe. Consisting of a high temperature tank and an intermediate temperature tank which are in communication, the intermediate temperature tank has a hollow portion, the hollow portion surrounds the high temperature tank through a flue portion, the high temperature tank, the high temperature tank. A far-infrared radiator is disposed so as to surround it, an inner flue portion is formed between the far-infrared radiator and the high temperature tank, and the inner flue is provided between the far-infrared radiator and the intermediate temperature tank. A high temperature generator of an absorption chiller-heater, characterized in that an outer flue part communicating with the part is formed and at least one of the high temperature tank and the medium temperature tank is provided with a stirring means.