KR0138080B1 - Equi-center cylinder type absorptive airconditioner - Google Patents

Abstract

The present invention relates to a concentric cylindrical absorption type air conditioner, and an object thereof is to improve an inner cylinder in which a refrigerant condenses and to install a precooling cylinder around an outer cylinder to improve condensation efficiency and heat exchange efficiency.

The concentric cylindrical absorption type air conditioner according to the present invention is provided with a plurality of inner cylinders (2) condensing the refrigerant at a predetermined interval spaced concentrically to improve the condensation of the refrigerant, the pre-cooling cylinder (5) to reduce the agricultural solution Therefore, the refrigerant gas absorption is improved, and as the heat transfer area is increased by the spiral heat exchange tube 6, the heat exchange efficiency is improved.

In addition, as the refrigerant liquid injected from the refrigerant liquid distributor 7 is uniformly distributed over the entire circumferential surface of the heat exchanger tube 6, the evaporation of the refrigerant is not locally generated, thereby improving the amount of evaporation and improving the heat exchange efficiency. The agricultural liquid distributed in (8) has an advantage that the contact area with the refrigerant gas becomes wider evenly over the entire inner wall of the inner wall of the outer cylinder (3), thereby improving its absorbency.

Description

Concentric Cylindrical Absorption Air Conditioner

1 is a system diagram showing a first embodiment of a concentric cylindrical absorption type air conditioner according to the present invention.

2 is a system diagram showing a second embodiment of a concentric cylindrical absorption type air conditioner according to the present invention.

3 is a system diagram showing a third embodiment of a concentric cylindrical absorption type air conditioner according to the present invention.

4 is a system diagram showing the overall structure of a conventional absorption type air conditioner.

* Explanation of symbols for main parts of the drawings

1: cooling and heating base 100: generator

110 Solution Heat Exchanger 120

130: first refrigerant tube 131: second refrigerant tube

132: third refrigerant tube 140: the first solution tube

141: second solution and 2: the inner cylinder

3: outer cylinder 4: heat dissipation fin

5: Precooling cylinder 6,6A: Heat exchanger tube

7: Refrigerant dispenser 700: Refrigerant dispenser

8: Solution distributor V1, V3: Shut-off valve

V2, V4: Three way valve

The present invention relates to an absorption type air conditioner that performs cooling and heating by using lithium bromide solution as an absorbent, water as a refrigerant, and heat energy as a driving source. Particularly, a plurality of internal cylinders in which refrigerant is condensed are dispersed and formed. Evaporation and pre-cooling cylinder for pre-cooling the absorbing solution to the outer cylinder absorbed by the solution is supplied to the outer cylinder, and winding the heat exchanger tube of the outer cylinder spirally to secure a sufficient heat exchange area to evaporate and evaporate the refrigerant It relates to a concentric cylindrical absorption type air conditioner that improves the absorption efficiency of the refrigerant gas into the precooled solution.

In addition, the present invention provides a solution distributor along both inner walls of the outer cylinder and a refrigerant liquid distributor along the arc direction of the heat exchange tube steel portion, so that the concentrated solution of the refrigerant is uniformly distributed over the entire circumferential surface of both the heat exchange tube and the outer cylinder inner wall. The present invention relates to a concentric cylindrical absorption type air conditioner having improved heat exchange and absorption of refrigerant gas.

In general, the air conditioner using the Lithium bromide solution, which is known to have excellent water absorption ability at low temperature, is heated in a generator to cool the Lithium bromide solution (hereinafter referred to as the following solution) into a refrigerant (high temperature and high pressure steam) and a concentrated solution, and then the refrigerant. After condensing the gas in the condenser and evaporating it from the surface of the heat exchanger tube, separating it into the agricultural solution, condensing the refrigerant gas in the condenser and evaporating it from the surface of the heat exchanger tube, and absorbing the agricultural liquid as the refrigerant gas. It is configured to absorb the refrigerant gas evaporating from the surface of the heat exchanger tube, convert it into a dilute solution by supplying it to both inner sides of the cylinder and flowing along the wall surface, and then return the dilute solution to the generator for reheating.

In this cooling cycle, when the refrigerant evaporates outside the heat exchanger tube, the heat exchanger tube is cooled, and thus water circulated through the heat exchanger tube to the indoor heat exchanger is cooled to cool the room.

In addition, the air conditioner heats the solution in the generator during heating, separates it into a refrigerant (water vapor of high temperature and high temperature) and a concentrated solution, and then supplies the refrigerant directly to the outside of the heat exchanger tube to condense it, thereby heating the heat exchanger tube by the heat of condensation. The water circulating inside is heated, and the room is heated by supplying it to a heat exchanger in the room. The refrigerant liquid condensed on the surface of the heat exchange tube is returned to the generator to perform a heating cycle.

The conventional configuration of the air conditioner for heating such a solution will be described in detail with reference to FIG.

First, the air-conditioning base 1A is a generator 100 for heating a solution to separate a refrigerant into a concentrated solution, an inner cylinder 2 for condensing the refrigerant, and the condensed refrigerant to evaporate and cool the heat exchange tube 6 or the generator. Condensing the refrigerant from the (100), the outer cylinder (3) for heating the heat exchange tube (6), the concentrated solution from the generator 100 and the rare solution absorbing the refrigerant evaporated in the outer cylinder (3) The solution is largely soaked with a solution solution heat exchanger (110) that serves to cool the solution and heat the rare solution.

In addition, a heat dissipation fin 4 is provided between the inner and outer cylinders 2 and 3, and the blowing fan 101 is installed directly above the outer cylinder 3, and the work between the inner and outer cylinders 2 and 3 is provided. The temperature sensor (S1, S2) for sensing the temperature is configured on the side. And the sprinkler 103 and the cooling water tank 102 is installed on the upper and lower parts of the air conditioning basic body 1A, which is to ensure the safety of the system operation, such as preventing the precipitation of the solution during the cooling operation.

That is, the cooling fan 101 of the cooling and heating basic body 1A was operated to cool the inner and outer cylinders 2 and 3 during the cooling operation, but the cooling performance of the blowing fan 101 was lowered due to the high external air temperature. When the external cylinders 2 and 3 are overheated, they are sensed by each temperature sensor S1 and S2 to pump water from the cooling water tank 102 to the cold gas pump P2, and in the sprinkler 103, the internal and external cylinders. It is configured to improve cooling performance by spraying toward (2, 3).

However, the conventional cooling and heating base body 1A serves as a condenser by configuring the inner cylinder 2 as a single cylinder. However, since the outer surface area of the cylinder is small, the heat transfer area for exchanging heat with the outside air is reduced. There is a limit to cooling and condensing efficiently. Since the heat exchanger tube 6 of the outer cylinder 3 is disposed in the vertical direction, the contact time between the water circulating in the room and the coolant is short and the heat transfer area of the heat exchanger tube 6 is small, so that the heat exchange and the refrigerant evaporate effectively. Becomes difficult.

On the other hand, since the refrigerant is supplied from directly above the separator plate 104 through a plurality of holes 105 provided radially in the center of the separator plate 104 that separates the outer cylinder 3 up and down, uniform distribution of the refrigerant. It is difficult to cause the local evaporation concentration of heat exchange tube (6), and also the agricultural solution flowing into the outer cylinder (3) is introduced in the solution heat exchanger 110 is not sufficiently low temperature so that the absorption rate is lowered Of course, if the heat of absorption generated during absorption is large, the heat of absorption cannot be sufficiently removed by the outside air alone.

In addition, there is no means for uniformly flowing the concentrated solution to the inner wall surface of the outer cylinder (3) there is a problem that the absorption of the refrigerant occurs irregularly because the solution flows locally.

The present invention is to solve such a problem, the main object of the present invention is to improve the condensability by dispersing and cooling the refrigerant vapor of high temperature and high pressure, and supplying to the external cylinder in a state of cooling the agricultural liquid to a low temperature To improve the absorbency of the refrigerant gas evaporated from the surface of the heat exchanger tube, and to increase the heat transfer area of the heat exchanger tube to provide a concentric cylindrical absorption type air conditioner to improve the heat exchange efficiency.

And a secondary object of the present invention is to improve the evaporation efficiency by supplying the coolant evenly to the heat exchanger tube, the concentric cylindrical absorption type air conditioner to smoothly absorb the refrigerant gas evaporated by flowing the agricultural liquid evenly from the top to the bottom of the inner wall of the outer cylinder To provide.

The present invention for achieving the above object is a generator for heating the solution to separate the steam refrigerant and the agricultural solution, the inner cylinder and the concentric concentric circles spaced condensing the steam refrigerant and the outer cylinder for evaporating or condensing the refrigerant The cooling and heating base made up, a blower fan provided in the upper part of the cooling and heating body to cool the inner cylinder and the outer cylinder, the heat exchanger tube provided in the outer cylinder to be cooled or heated by the evaporation or condensation of the refrigerant, the agricultural liquid is cooled and absorbed the refrigerant The solution is an absorption air conditioner with a solution heat exchanger that heats,

The inner cylinders provided inside the outer cylinders are arranged in a plurality of concentric circles and spaced at predetermined intervals to improve the condensation rate of the steam refrigerant.

A pair of precooling cylinders are provided on the inner and outer sides of the outer cylinder so as to be spaced a predetermined distance from the inner and outer sides of the outermost inner cylinder and the outer cylinder.

The heat exchange tube is characterized in that it is provided by spirally wound up and down inside the outer cylinder.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. 1 is a schematic diagram showing the overall structure of an absorption type air conditioner according to the first embodiment of the present invention.

Absorption type air conditioner, as shown here, is provided in the axial direction in the generator 100 for heating the solution in the lower part of the heating and heating base (1) forming the appearance into a high-temperature, high-pressure steam refrigerant and a concentrated solution, the central heating and cooling body (1) An inner cylinder (2) for condensing the refrigerant and an outer cylinder (3) installed to surround the refrigerant and cooling or heating the heat exchange tube (6) by evaporating or condensing the refrigerant, and solution heat exchange for lowering the concentration of the agricultural solution and the high temperature of the rare solution. Group 110 and the like. And a blowing fan 101 is installed directly on the outer cylinder (3) to cool the outer cylinder (3) and the inner cylinder (2), the cooling water tank 102 to cool the inner and outer cylinders (2,3) And a watering machine 103 and the like.

On the other hand, the inner cylinder (2) provided inside the outer cylinder (3) is arranged in a plurality of spaced apart a predetermined interval to form a concentric circle as a characteristic element of the present invention. Inside and outside of the outer cylinder 3, a pair of precooling cylinders 5 are disposed so as to be spaced apart from the inner and outer sides of the outermost inner cylinder 2 and the outer cylinder 3 by a predetermined distance, and each inner cylinder 2 ) And the outer cylinder (3) and the precooling cylinder (5) is provided with a heat radiation fin (4).

In addition, the inlet 121 and the outlet 122 of the air conditioning tube 120 are disposed at one upper end of the outer cylinder 3, and the heat exchanger tube 6 connecting the inlets and outlets 121 and 122 is disposed at the upper portion of the outer cylinder 3. It is formed by winding in two rows of spiral shapes.

In addition, the first refrigerant pipe 130 for guiding the steam refrigerant generated in the generator 100 to the inner cylinder is provided, the first minute respectively changed in the first refrigerant pipe 130 on the upper side of each inner cylinder (2) An engine 130A is provided so that the steam refrigerant is uniformly supplied to each inner cylinder. One end is coupled to the lower end of each inner cylinder (2), and the other end is separated from one end of the second refrigerant pipe (131) connected to the refrigerant liquid distributor (7) described later on the upper end of the outer cylinder (3). 131A is provided. At this time, the third solution pipe 132 connecting the lower end of the outer cylinder 3 and the generator 100 and passing through the solution heat exchanger 110 is formed in the same manner as in the prior art. Accordingly, a plurality of first branch pipes 130A are formed radially on the upper end of each inner cylinder 2 so that refrigerant gas of high temperature and high pressure flows in and out over the entire circumferential surface of the upper end of each inner cylinder 2. The second branch pipe 131A is also radially formed at the lower end of each inner cylinder 2 so that the refrigerant liquid condensed in each inner cylinder 2 is dispersed and discharged over the entire circumferential surface of the lower end.

And a first solution pipe 140 connecting the solution heat exchanger 110 and the upper ends of the respective precooling cylinders 5, and connecting the lower ends of the respective precooling cylinders 5 and the upper ends of the outer cylinders 3. The two solution tube 141 is comprised. Install the three-way valve (V4) in place of the first solution pipe 140, the shut-off valve (V3) in place of the second solution pipe (141), connect the three-way valve (V4) and the second solution pipe (141). Solution connecting pipe 141A is configured to. When the second solution pipe 141 is closed by operating the shutoff valve V3, the solution connection pipe 141A connects the solution of the generator 100 with the three-way valve V4 of the first solution pipe 140. It is provided to be analogous to the outer cylinder (3) via the pipe (141A).

An annular refrigerant liquid distributor (7) is formed in the upper portion of the heat exchange tube (6) of the outer cylinder (3) to radially drill a plurality of refrigerant distribution holes (700) for distributing the refrigerant from the first refrigerant tube (131). A solution distributor 8 is provided on both inner walls of the upper end of the outer cylinder 3 to supply the concentrated solution from the second solution pipe 141 to both inner walls.

Reference numeral V1 denotes a shut-off valve of the first refrigerant pipe 130, V2 denotes a three-way valve of the second refrigerant pipe 131, and 130B denotes a three-way valve V2 of the second refrigerant pipe 131 and the first refrigerant pipe ( Refrigerant connection pipe connecting the 130, 300 is an inner heat radiation fin formed on the inner wall of both sides of the outer cylinder (3) up and down. And S1 and S2 is a temperature sensor for sensing the temperature of the inner cylinder (2) and the outer cylinder (3), P2 is a cooling water pump for pumping the cooling water of the cooling water tank 102 to the sprayer 103, P1 is a solution pump, P3 represents the second solution pump formed in the second solution pipe 141.

Next will be described the operation of the concentric cylindrical absorption type air conditioner according to the present invention configured as described above.

First, during the cooling operation, the shutoff valve V1 of the first refrigerant pipe 130 is opened and the three-way valve V2 of the second refrigerant pipe 131 is operated to close the refrigerant connection pipe 130B. The shutoff valve V3 of the second solution pipe 141 is opened and the three-way valve V4 of the first solution pipe 140 is operated to close the solution connection pipe 141A. In such a state, when the high temperature and high pressure steam refrigerant from the generator 100 is uniformly supplied to each of the inner cylinders 2 through the first refrigerant pipe 130 and the first branch pipe 130A, the operation of the blower fan 101 is achieved. Condensation takes place as the inner cylinder 2 and the heat dissipation fins 4 cool.

Subsequently, the condensed refrigerant is supplied to the refrigerant liquid distributor 7 of the outer cylinder 3 through the second branch pipe 131A and the second refrigerant pipe 131, and the refrigerant is supplied to the heat exchange tube from the refrigerant liquid distributor 7. When supplied to (6), evaporation takes place on the surface of the cold water pipe, and heat is removed from the water circulating through the inside of the heat exchange tube (6). Accordingly, the circulating water is cooled to cool the room.

In addition, the concentrated solution from the generator 100 is advanced to the precooling cylinder (5) via the first solution tube 140, and then cooled by the air of the blower fan (101) in the heat dissipation fin (4) and the precooling cylinder (5). The second solution pipe 141 is supplied to the solution distributor 8 of the outer cylinder 3.

At this time, the concentrated solution flows along both inner walls of the outer cylinder 3 to absorb the refrigerant evaporating from the surface of the heat exchange tube 6, and the heat of absorption generated in this process is cooled by the heat radiation fins 4. In addition, the solution that absorbs the evaporating refrigerant is changed from the concentrated solution to the rare solution is recovered to the generator 100 through the solution heat exchanger 110 to form a cooling cycle.

The following describes the operation during heating operation. In this case, as opposed to the cooling and cooling operation, the shutoff valve V1 of the first refrigerant pipe 130 is closed, and the three-way valve V2 of the second refrigerant pipe 131 is operated to open the refrigerant connection pipe 130B. In addition, the three-way valve V4 of the first solution pipe 140 is operated to close the first solution pipe 140A, and the shutoff valve V3 of the second solution pipe 141 is closed. And the blower fan 101, the sprinkler 103 and the cooling water pump (P2) is stopped.

In this state, the refrigerant of the high temperature and high pressure from the generator 100 passes through the first refrigerant pipe 130, the refrigerant connecting pipe 130B and the second refrigerant pipe 131, and the refrigerant liquid distributor 7 on the upper portion of the external cylinder 3. The heat exchanger tube 6 is heated by the heat of condensation by condensation on the surface of the heat exchanger tube 6 by direct supply, and thus the water circulating through the heat exchanger tube 6 is heated to perform heating.

Thus, the concentric cylindrical absorption type air conditioner according to the first embodiment of the present invention, which has a cooling and heating action, is provided with a plurality of inner cylinders concentrically, and condensation is improved due to an increase in heat transfer area. In addition, the refrigerant liquid distributor 7 is provided so that the liquid refrigerant flows on the surface of the heat exchange tube 6 so that the time for the liquid refrigerant to flow through the heat exchange tube 6 is increased and the heat transfer area of the heat exchange tube 6 is increased to increase the heat exchange amount. do.

In addition, the agricultural liquid flows to the precooling cylinder 5 before the agricultural liquid flows into the outer cylinder 3, and the agricultural liquid is cooled by air passing through the surrounding cylinder 3, and then through the solution distributor 8 of the cylindrical cylinder 3. By allowing the entire inner wall to flow evenly, it is possible to supply a low temperature agricultural solution, thereby increasing the refrigerant gas absorption of the agricultural solution.

On the other hand, Figure 2 is a schematic diagram showing a concentric cylindrical absorption type air conditioner according to a second embodiment of the present invention, which is the first branch pipe (1) of the first refrigerant pipe 130 in the same configuration and effect as the first embodiment ( 130C) is formed to protrude a predetermined height from the lower end of each of the inner cylinder (2), and the protruding first branch pipe (130C) and the inner wall of each of the inner cylinder (2) are configured to be spaced a predetermined distance apart. A plurality of first branch pipes 130 are formed radially at the lower end of each inner cylinder 2, but are arranged alternately with the second branch pipes 131A formed in a plurality of radially at the lower end of each inner cylinder (2).

In the absorption type air conditioner according to the second embodiment of the present invention, during the cooling operation, cooling is introduced into each inner cylinder 2 from the generator 100 through the first refrigerant pipe 130 and the first branch pipe 130C. Condensation takes place on the inner wall of the cylinder 2. At this time, since the inner wall of each inner cylinder 2 of the first branch pipe 130C is spaced apart from the inner wall 2 by a predetermined interval, the condensed refrigerant (water of high temperature and high pressure) does not flow back to the first branch pipe 130C. And the first refrigerant pipe 130 is located in the lower portion of the inner cylinder 2 has the advantage of reducing the pipe length.

In addition, the refrigerant flowing into each of the inner cylinders 2 through the first refrigerant pipe 130 and the first branch pipe 130C positioned at the bottom thereof is in a vapor state, and thus, flows to the upper portion of each of the inner cylinders 2 and condenses. Does not cause.

3 is a system diagram showing a concentric cylindrical absorption type air conditioner according to a third embodiment of the present invention, which has a configuration and effect similar to that of the first chamber, and is provided on one side of the outer cylinder 3 at the upper and lower ends of the heating and cooling pipes 120. The outlet 122 and the inlet 121 are arranged, and the heat exchanger tube 6A connecting the outlet 122 and the inlet 121 is wound in a spiral line from the top of the outer cylinder 3 to the bottom thereof.

The concentric cylindrical absorption type air conditioner according to the third embodiment of the present invention configured as described above has water circulating through a heat exchanger (not shown) in the room through the air-conditioning pipe 120 and flows back through the upper part from the lower part of the outer cylinder 3. When circulating, the refrigerant liquid distributed in the refrigerant liquid distributor 7 evaporates on the surface of the heat exchange tube 6A of the external cylinder 3 and flows from the solution distributor 8 along the inner wall of the external cylinder 3. To be absorbed.

As described above in detail, the concentric cylindrical absorption type air conditioner according to the present invention improves the condensability of the refrigerant by a plurality of internal cylinders, and because the agricultural solution is lowered by the precooling cylinder, the refrigerant gas absorption is improved, The heat bridge efficiency is improved as the heat transfer area is increased by the heat exchange tube of the type.

In addition, as the refrigerant liquid injected from the refrigerant liquid distributor is uniformly distributed over the entire circumferential surface of the heat exchanger tube so that the evaporation of the refrigerant is not locally generated, the evaporation amount is improved and the heat exchange efficiency is improved, and the agricultural liquid distributed in the solution distributor is The contact area between the refrigerant gas and the contact surface of the outer wall of the inner wall of the outer cylinder is made to be uniform, so that its absorption is improved.

Claims (10)

Generator 100 for heating the solution to separate the steam refrigerant and the agricultural solution, the inner cylinder (2) for condensing the steam refrigerant and a concentrically spaced spaced at regular intervals and consists of an outer cylinder (3) for evaporating or condensing the refrigerant Cooling and heating base (1), the blowing fan 101 is provided on the upper portion of the cooling and heating base (1) to cool the inner cylinder (2) and the outer cylinder (3), the outer cylinder (3) evaporation or condensation of the refrigerant An absorption air-conditioner having a heat exchanger tube (6) cooled or heated by an action, and a solution heat exchanger (110) that cools a concentrated solution and heats a rare solution that absorbs a refrigerant, wherein the inside of the outer cylinder (3) is provided. The inner cylinder (2) is formed in a plurality of concentric circles and spaced apart a predetermined interval so as to improve the condensation rate of the steam refrigerant, the outermost inner cylinder (2) and the outer cylinder (3) inside and outside the outer cylinder (3) Inside and outside of And a pair of precooling the cylinder (5) adapted to be a predetermined distance apart, the heat exchange tube 6 is concentric cylindrical Absorption Cooling & Heating characterized in that the phase, prepared by winding a downward spiral in the inside of the outer cylinder (3). The concentric cylindrical absorption type air conditioner according to claim 1, wherein a heat dissipation fin (4) is provided between the inner cylinder (2), the outer cylinder (3), and the precooling cylinder (5) to facilitate heat dissipation. The method of claim 1, wherein the first refrigerant pipe 130 and one end to guide the vapor refrigerant generated in the generator 100 to the upper side of the inner cylinder (2) is condensed by being coupled to the lower end of the inner cylinder (2) Second refrigerant pipes 131 for guiding the refrigerant to the outer cylinder 3 are provided, and the upper end of each of the inner cylinders 2 are separated from the first refrigerant pipe 130 so that the steam refrigerant is uniformly introduced. One branch pipe 130A is provided, and a second branch pipe 131A is split at one end of the second refrigerant pipe 131 at the lower end of each of the inner cylinders 2 to guide the condensation refrigerant uniformly. Concentric cylindrical absorption type air-conditioner, characterized in that provided. The method of claim 3, wherein the first branch pipe (130C) is projected a predetermined height from the lower end of each of the inner cylinder (2) to the upper, it is provided to be spaced apart from the inner wall of each of the inner cylinder (2) by a predetermined interval. Concentric cylindrical absorption type air conditioner. According to claim 1, The upper end of the outer cylinder (3) by spraying the Ann guided from the second refrigerant pipe 131 a plurality of refrigerant distribution holes 700 to radially heat exchange the heat exchange tube (6) A concentric cylindrical absorption type air conditioner, characterized in that a perforated annular refrigerant liquid distributor (7) is provided. The heat exchanger of claim 1, wherein an inlet 121 and an outlet 122 of the air conditioning tube 120 are disposed on one side upper end of the outer cylinder 3, and the inlet 121 and the outlet 122 are connected to each other. Tube (6) is a concentric cylindrical absorption type air-conditioner, characterized in that it is provided by winding in a spiral two rows from the top to the bottom of the outer cylinder (3). According to claim 1, Outlet 122 and the inlet 121 of the air-conditioning pipe 120 is disposed on the lower side on one side of the outer cylinder (3), connecting the inlet 121 and the outlet 122 The heat exchanger tube (6A) is a concentric cylindrical absorption type air conditioner, characterized in that it is provided by winding in a spiral line from the top to the bottom of the outer cylinder (3). According to claim 1, First solution tube 140 connecting the solution heat exchanger 110 and the upper end of each pre-cooling cylinder (5), the lower end of each of the pre-cooling cylinder (5) and the outer cylinder (3) A concentric cylindrical absorption type air conditioner, characterized in that to install a second solution pipe 141 connecting the top of the). The method of claim 8, wherein the first solution pipe 140 is provided with a three-way valve (V4), the second solution pipe 141 is provided with a shut-off valve (V3), the three-way valve (V4) and the steel Concentric cylindrical absorption type air conditioner, characterized in that it comprises a solution connecting pipe (141A) for connecting the second solution pipe (141) 11. The concentric conduit according to claim 10, characterized in that a solution distributor (8) is provided on both inner walls of the upper end of the outer cylinder (3) to evenly supply the concentrated solution guided from the second solution pipe (141) to both inner walls. Cylindrical absorption air conditioner.