JPH116667A - Absorption refrigeration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately adjust the flow rate of a cooling water passing in each absorption coil by providing a flow rate control structure for adjusting the flow rate of the cooling water passing through each of a plurality of piping members to the flow rate corresponding to each heat exchange surface area of a plurality of piping members in a branch structure member. SOLUTION: In a branch structure member 313, a flow rate adjustment structure is provided and the flow rate of cooling water passing in each piping member (an absorption coil) 31 constituting piping for exchanging heat is adjusted to the flow rate corresponding to the heat exchange surface area of each piping member 31. More specifically, when the heat exchange surface area is larger, the flow rate increases. On the other hand, when the heat exchange surface is smaller, the flow rate decreases. As a result, a cooling capability corresponding to the amount of generated heat that is proportional to the heat exchange surface area is set in the surfaces of a plurality of piping member 31 and no big difference is generated in the temperature of the cooling water after passing through each piping member 31, thus preventing the difference from being generated in the efficiency of heat exchange on the surface of each piping member 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration apparatus having an absorption cycle using an aqueous solution of lithium bromide or the like as an absorption liquid, and more particularly, to a method in which a plurality of cooling water pipes (absorption coils) are provided in an absorber. The present invention relates to a structure for adjusting the flow rate of each cooling water pipe in the arrangement arranged in the above.

[0002]

2. Description of the Related Art In an absorption refrigeration system, a low-concentration absorbing solution is heated and boiled by a burner in a regenerator to separate a high-concentration absorbing solution from refrigerant vapor. The refrigerant vapor separated by the regenerator is cooled by the condenser to become a refrigerant liquid. The high-concentration absorbent separated by the regenerator is used as an absorption tube (absorption coil) in the absorber.
When the refrigerant liquid is sprayed on the evaporator tube (evaporation coil) in the evaporator provided in communication with the absorber, the refrigerant liquid is vaporized from the cold and hot water passing through the evaporator tube on the evaporator tube surface. It takes away heat and evaporates, while on the surface of the absorption tube,
The high concentration absorbing liquid absorbs the refrigerant vapor and generates heat.

[0003] The cold and hot water whose heat has been removed by the evaporating tube circulates through a heat exchanger provided on the object to be cooled by the operation of the pump and becomes a cooling source in the object to be cooled. Conversely, the cold / hot water whose temperature has increased in the heat exchanger is cooled again in the evaporator tube. On the other hand, the heat generated when the absorbing liquid absorbs the refrigerant vapor on the surface of the absorption pipe moves to the cooling tower provided outside by the cooling water for exhaust heat passing through the absorption pipe by the operation of the pump, and is cooled. Released at the tower. The absorption cycle is configured such that the absorption liquid that has been reduced in concentration by absorbing the refrigerant liquid in the absorber is returned to the regenerator by the absorption liquid pump.

In the absorption refrigeration system having the above-described structure, the absorption coil provided as a coil-shaped cooling water pipe for passing cooling water for exhaust heat for cooling the inside of the absorber has a surface area for heat exchange. Is provided as a double coil having different winding diameters, so that cooling is efficiently performed with a limited volume in the absorber. here,
Since the flow rate of the cooling water passing through each absorption coil needs to be divided according to the surface area of each absorption coil, an orifice member for restricting the flow rate in the absorption coil having the smaller surface area is welded or brazed. And the flow rate of the cooling water passing through the two absorption coils is adjusted to be a flow rate corresponding to the surface area.

[0005]

As described above, in the prior art in which the orifice member is joined in the absorption coil, the joining operation is performed inside the cooling water pipe serving as the absorption coil, so that welding or brazing is performed. However, there is a problem that the workability is poor, it takes time, and it is difficult to make the joining state uniform, so that the adjustment of the flow rate is not stable and the quality tends to be uneven.

According to the present invention, in the manufacture of an absorption refrigeration system in which a plurality of absorption coils are provided in an absorber, the flow rate of cooling water passing through each absorption coil is appropriately adjusted without lowering the workability. The purpose is to adjust.

[0007]

According to the present invention, claim 1 is:
A regenerator that heats an absorbing liquid containing a refrigerant to separate refrigerant vapor from the absorbing liquid, a condenser that cools and condenses the refrigerant vapor separated by the regenerator, and a refrigerant liquid condensed in the condenser. A heat exchanger for evaporating under a low pressure, and a refrigerant vapor evaporating in the evaporator being absorbed by an absorbing liquid supplied from the regenerator and passing through a cooling water for absorbing heat generated at the time of the absorption. In an absorption refrigeration apparatus in which an absorption cycle is formed by an absorber in which a pipe for use is disposed and a pump for returning the absorption liquid from the absorber to the regenerator, the absorption pipe is used as the heat exchange pipe of the absorber. A plurality of piping members having different heat exchange surface areas forming a plurality of flow paths in the vessel are provided, via a branch structure member having a branch structure for branching or merging the single flow path and the plurality of flow paths, Absorber The plurality of pipe members are connected to a single external pipe for cooling water provided outside the absorber, and the flow rate of the cooling water passing through each of the plurality of pipe members is set in the branch structure member. The technical means is to provide a flow rate adjusting structure for adjusting a flow rate corresponding to each heat exchange surface area of the plurality of pipe members.

According to a second aspect of the present invention, in the first aspect, the plurality of piping members of the absorber exhibit a multiple coil shape concentrically wound with different winding diameters. According to a third aspect of the present invention, in the first and second aspects, the flow rate adjusting structure is an orifice structure formed in the plurality of flow paths branched from the branch structure member. According to Claim 4, in Claims 1 to 3, a cooling water pipe is provided inside the condenser, and the branch structure member includes the plurality of pipe members in the absorber and the pipes in the condenser. The technical means is to also serve as a connecting member for connecting to a single cooling water pipe. In claim 5,
The condenser according to any one of claims 1 to 4, wherein the condenser is disposed above the absorber, and the branching structural member includes a plurality of piping members in the absorber on a side of the absorber and the condenser. Technical means is an elbow provided for connecting the single cooling water pipe in the condenser.

According to the present invention, in the present invention, a plurality of pipe members are provided as heat exchange pipes through which cooling water passes in the absorber, and these pipe members are formed by a branch structure member having a branch structure. Connected to a single external pipe for cooling water outside the absorber. In the absorption cycle, when the absorbent is supplied from the regenerator into the absorber, the refrigerant vapor in the absorber is absorbed by the absorbent and generates heat at that time, but the heat exchange pipe in the absorber is cooled. The heat is absorbed by the passage of water, and the heat is exhausted outside the absorber.

[0010] Here, a flow rate adjusting structure is provided in the branch structure member, and the flow rate of the cooling water passing through each pipe member constituting the heat exchange pipe is determined by the heat exchange surface area of each pipe member. The flow rates are adjusted to correspond to each other, and the flow rate is large for those having a large heat exchange surface area, and reduced for those having a small heat exchange surface area. Thereby, the cooling capacity corresponding to the amount of heat generated in proportion to the heat exchange surface area is provided on the surfaces of the plurality of pipe members, and there is no large difference in the temperature of the cooling water after passing through each pipe member. Therefore, there is no difference in the efficiency of heat exchange on the surface of each piping member, and there is no variation in absorption of refrigerant vapor by the absorber liquid among the piping members, and the efficiency of the absorber does not decrease.

As described above, according to the present invention, the flow rate adjusting means for adjusting the flow rate of the cooling water passing through each piping member in the absorber to make the heat exchange efficiency uniform is provided in the branch structure member. Have been. For this reason, it is possible to adjust the flow rate in each piping member simply by incorporating the flow rate adjusting means in advance in the branching structural member, and to join orifices for adjusting the respective flow rates in each piping member. No need to do. Since the branch structure member is always used when connecting a plurality of pipe members to a single external pipe for cooling water, etc., the branch structure member is formed with an orifice or the like incorporated in advance when forming the branch structure member. By doing so, it is easy to have a function as flow rate adjusting means. Therefore, there is no need to perform operations such as attaching and joining members for adjusting the flow rate in each piping member as in the related art, and the assembling operation does not become complicated.

As the flow control means provided in the branch structure member, in addition to the above-mentioned orifice, each pipe diameter of a plurality of flow paths branched from a single flow path corresponds to the heat exchange surface area of each pipe member. It is also possible to use one that causes it.

[0013]

FIG. 1 shows an embodiment of an air conditioner according to the present invention. The air conditioner includes an outdoor unit 100 as an absorption refrigeration unit and an indoor unit RU.
Is the refrigerator main body 101 and the cooling tower (cooling tower) C
And T. The air conditioner is controlled by the control device 10
2 is controlled.

The refrigerator main body 101 is mainly formed of stainless steel, and forms an absorption cycle of a refrigerant and an aqueous solution of lithium bromide as an absorbing liquid. The refrigerator 101 has a gas burner B as a heating means provided below. 1 and a low-effect regenerator 2 arranged so as to cover the outside of the high-temperature regenerator 1, and absorption absorbers arranged outwardly on the outer periphery of the low-temperature regenerator 2 in order. Vessel 3
The evaporator 4 is connected to the condenser 5 disposed above the absorber 3 and the evaporator 4 on the outer periphery of the low-temperature regenerator 2 through several passages. Note that the absorbing solution contains an inhibitor for suppressing corrosion due to the reaction between stainless steel and lithium bromide.

A high-temperature regenerator 1 is provided above a heating tank 11 heated by a gas burner B, above a medium-concentration absorbent separating cylinder 1.
2, a vertical cylindrical airtight refrigerant recovery tank 10 is provided so as to cover the outer periphery of the medium-concentration absorbing liquid separation tube 12 from above.

On the lower side of the middle-concentration absorbing liquid separating cylinder 12,
An absorbent partitioning vessel 13 arranged at a distance from the inner wall of the medium-concentration absorbent separation tube 12 is provided with several upper edge portions joined to the inside of the medium-concentration absorbent separation tube 12,
Between the medium-concentration absorbing liquid separating cylinder 12 and the absorbing liquid partitioning vessel 13, an absorbing liquid rising flow path 14 in which the absorbing liquid heated in the heating tank 11 rises is formed.

An absorption liquid return plate 15 for returning the absorption liquid rising in the absorption liquid ascending flow path 14 is provided in the medium concentration absorption liquid separation cylinder 12 above the absorption liquid partitioning vessel 13.
The above-mentioned medium-concentration absorbent separation cylinder 12 is provided with the absorbent return plate 1.
The upper and lower members 5 and 5 are joined by welding to the absorbing liquid return plate 15.

At the side of the absorption liquid partitioning vessel 13, the medium-concentration absorption liquid from which the refrigerant has been separated and made highly concentrated is supplied to the low-temperature regenerator 2.
An inlet of the medium-concentration absorbent flow path L1 for supplying to the evaporator 4 is provided at the bottom of the absorbent-liquid partition container 13 for supplying the heated absorbent to the evaporator 4 during the heating operation. The inlet of the heating absorbent flow path L4 is open.

Inside the lower part of the refrigerant recovery tank 10, a refrigerant partitioning cylinder 17 for forming a heat insulating gap 17a between itself and the medium concentration absorbing liquid separating cylinder 12 is provided.
Is joined to. Thereby, the medium concentration absorbing liquid separating cylinder 1
2 is shut off, and the refrigerant in the refrigerant recovery tank 10
It is no longer heated by the high-temperature absorbing liquid in the absorbing liquid rising flow path 14. The inside of the refrigerant recovery tank 10 outside the refrigerant partition tube 17 is a refrigerant storage part 10a for storing the separated refrigerant, and the refrigerant storage part 10a has an inlet of a refrigerant flow path L5 communicating with the condenser 5. It is open.

With the above configuration, the high-temperature regenerator 1 heats the low-concentration absorbing liquid contained in the heating tank 11 by the gas burner B, evaporates water as a refrigerant in the low-concentration absorbing liquid, and cools the refrigerant. Separated as vapor (steam) to the outside of the medium-concentration absorption liquid separation tube 12, and the medium-concentration absorption liquid concentrated by evaporation of the refrigerant vapor is returned into the absorption liquid partitioning container 13 inside the medium-concentration absorption liquid separation tube 12, Medium concentration absorbent flow path L
1 supplies it to the low-temperature regenerator 2. Further, the separated refrigerant vapor is recovered in the refrigerant recovery tank 10 and supplied to the condenser 5 through the refrigerant flow path L5.

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.
0, a refrigerant vapor outlet 21 is provided around the ceiling of the low-temperature regenerator case 20. Low temperature regenerator case 20
The top of the ceiling is connected to the inside of the absorption liquid partitioning vessel 13 in the medium concentration absorption liquid separation tube 12 via the heat exchanger H by the medium concentration absorption liquid flow path L1.

An orifice (not shown) for restricting the flow rate of the medium-concentration absorbing liquid flowing from the absorbing liquid partitioning vessel 13 to the low-temperature regenerator 2 is provided in the medium-concentration absorbing liquid passage L1. The medium-concentration absorbing liquid is supplied into the container case 20 by a pressure difference from the medium-concentration absorbing liquid separating cylinder 12.
(Approximately 70 mmHg in the low-temperature regenerator case 20 and approximately 700 mmHg in the medium-concentration absorbent separation tube 12)

Thus, the low-temperature regenerator 2 reheats the medium-concentration absorbing liquid supplied into the low-temperature regenerator case 20 using the outer wall of the refrigerant recovery tank 10 as a heat source, and the medium-concentration absorbing liquid is re-heated. The refrigerant vapor and the high-concentration absorption liquid are separated by the gas-liquid separation section 22 above the high-concentration absorption liquid 20, and the high-concentration absorption liquid is stored in the high-concentration absorption liquid receiving section 23. At the bottom of the high-concentration absorbent receiving section 23, an inlet of a high-concentration absorbent flow path L2 communicating with the absorber 3 is opened.

On the outer periphery of the low-temperature regenerator case 20, a vertical cylindrical airtight evaporating / absorbing case 30 is concentrically arranged at the lower part, and a condenser case 50 is concentrically arranged at the upper part. , The low-temperature regenerator case 20 and the evaporating / absorbing case 30 are integrally welded to the bottom plate 18, and the inner end of the bottom plate 18 is welded to the outer peripheral surface of the lower member 12 b of the medium-concentration absorbent separation cylinder 12. Thus, the refrigerator main body 101 is formed. The inside of the low-temperature regenerator case 20 communicates with the inside of the condenser case 50 via the refrigerant vapor outlet 21 and the gap 5A.

The absorber 3 is an absorption pipe in which a copper pipe is wound in a vertical cylindrical shape between the inner part in the evaporation / absorption case 30 and the low-temperature regenerator case 20, and cooling water for exhaust heat flows inside. An absorption coil 31 wound in a coil shape is disposed, and a high-concentration absorbing solution is supplied above the absorption coil 31.
A high-concentration absorbing liquid spraying device 32 for spraying the liquid is disposed.

As shown in FIG. 2, the absorption coil 31 is provided outside the low-temperature regenerator case 20 on the outer side thereof.
And an inner and outer absorption coil 32b. The inner and outer double wound copper pipes are made of two copper tubes. An absorption coil inlet 311 is located below, and an absorption coil outlet 312 is located above.
The absorption coil inlet 311 is connected to the cooling water channel 34 via a branch elbow (not shown), and the absorption coil outlet 312 is connected to the merging elbow. 313 are connected.

The merging elbow 313 is provided in the evaporation / absorption case 3
0, the flow directions of the cooling water for exhaust heat flowing out from the absorption coil outlet 312 provided to protrude outward are changed upward, respectively, and merged. It has a double bending structure with respect to the flow direction of the cooling water for exhaust heat so as to change toward
The outlet side is connected to the inlet of the cooling coil 51 of the condenser 5.

Of the inflow conduits of the merge elbow 313, the inflow conduit 313a connected to the outer absorption coil 31a
Is a continuous pipe line having a constant diameter that forms a uniform cross-sectional area so that the cooling water for exhaust heat flowing out of the outer absorption coil 31a passes smoothly. An orifice 314 that limits the flow rate of the cooling water for exhaust heat is provided in the connected inflow pipe 313b. The orifice 314 is formed integrally (insert molding) when the merging elbow 313 made of rubber is molded. This orifice 314
The flow rate of the cooling water for exhaust heat passing through the inner absorption coil 31b having a small heat exchange surface area with respect to the outer absorption coil 31a having a large heat exchange surface area corresponds to the surface area of the two absorption coils 31. The flow rate is restricted so as to make the heat exchange efficiency in each absorption coil 31 uniform.

As shown in FIG. 4, the high-concentration absorbent sprayer 32 has a high-concentration absorbent flow path L2 connected to the high-concentration absorbent receiver 23 of the low-temperature regenerator 2 via a heat exchanger H. Liquid cooling container 32a, which cools by receiving and storing the high-concentration absorbing liquid supplied through
In order to distribute and drop the absorbent stored in the above manner on each circumference of the inner and outer doubly wound absorption coils 31 at a drop amount ratio corresponding to the surface area ratio of each of the absorption coils 31a and 31b, And two absorption liquid dispersing tubes 32b formed in the above. In each of the absorbent dispersion tubes 32b, the number and diameter of the drip holes are set so as to evenly drop the liquid on the circumference.

With the above configuration, in the absorber 3, the high-concentration absorbent in the high-concentration absorbent receiving section 23 of the low-temperature regenerator 2 flows in from the high-concentration absorbent flow path L2 due to the pressure difference, and the high-concentration absorbent that has flowed in. The liquid is sprayed on the upper end of the absorbing coil 31 by the high-concentration absorbing liquid spraying tool 32, adheres to the surface of the absorbing coil 31 to form a thin film, flows downward by the action of gravity, absorbs water vapor, and absorbs water vapor. It becomes an absorbing solution. When absorbing the water vapor, heat is generated on the surface of the absorption coil 31.
1 is cooled by the cooling water for exhaust heat circulating in 1.

Here, the two absorption coils 31a, 31b
The cooling water for exhaust heat passing through is set by the orifice 314 in the merge elbow 313 such that the flow rate passing through the outer absorption coil 31a is higher than the flow rate passing through the inner absorption coil 31b. A difference was generated in the heat exchange capacity on the surface of each of the inner and outer absorption coils 31a and 31b so as to correspond to the amount of heat generated in proportion to the heat exchange surface area, and each of the absorption coils 31a and 31b was heated to the same temperature. The cooling water for exhaust heat flows out and the confluence elbow 3
After being merged at 13, it further flows into a cooling coil 51 in the condenser 5 described later. The water vapor absorbed by the absorbing liquid is generated as refrigerant vapor in the evaporator 4 described later.

The bottom 33 of the absorber 3 is connected to the bottom of the heating tank 11 by a low-concentration absorbent flow path L3 to which a heat exchanger H and an absorbent pump P1 are mounted. The low-concentration absorbing liquid in the absorber 3 is supplied into the heating tank 11. Further, in the absorption coil 31, during the cooling operation, the cooling water for exhaust heat cooled by the cooling tower CT,
Split elbow 315 connected to absorption coil inlet 311
, And flows in, and then flows out after being merged by the merging elbow 313, and circulates through the cooling coil 51 of the condenser 5.

The evaporator 4 is provided on the outer periphery of a vertical cylindrical partition plate 40 provided with a plurality of communication ports (not shown) provided on the outer periphery of the absorption coil 31 in the evaporator / absorber case 30. A vertical cylindrical evaporating coil 41 made of a copper tube through which cold and hot water flows is provided, and a refrigerant liquid sprayer 42 is attached above the evaporating coil 41. The bottom 43 of the evaporator 4 is in communication with the bottom of the absorbent partitioning vessel 13 in the medium-concentration absorbent separation cylinder 12 through a heating absorbent flow path L4 having an electromagnetic cooling / heating switching valve 6.

With the above configuration, in the evaporator 4, when the refrigerant liquid (water) is caused to flow down from the refrigerant liquid sprayer 42 onto the evaporation coil 41 during the cooling operation, the flowed refrigerant liquid is evaporated by the surface tension. 41 is wetted on the surface to form a film.
In the evaporating / absorbing case 30 of Hg), the evaporating heat is taken from the evaporating coil 41 to evaporate, and the air-conditioning cold / hot water flowing in the evaporating coil 41 is cooled.

Next, the condenser 5 will be described. The condenser 5 is
A cooling coil 51 in which cooling water for exhaust heat cooled by the cooling tower CT circulates is provided inside the condenser case 50. As shown in FIG. 4, the condenser case 50 closes an opening above the evaporating / absorbing case 30 and forms a bottom plate of the condenser case 50, and forms a condenser chamber covering the boundary plate 52. And a condenser cover plate 53.

Between the cooling coil 51 and the boundary plate 52,
A refrigerant liquid receiving portion 50a for receiving a refrigerant liquid in which the refrigerant vapor cooled by the cooling coil 51 is liquefied in the condenser case 50 is provided, and the refrigerant liquid receiving portion 50a is provided below the boundary plate 52 with an absorber. 3 and a coolant cooler 54 provided for cooling the coolant to be sprayed to the high-concentration absorbent sprayer 32 and the evaporator coil 41 of the evaporator 4 to form a boundary plate assembly. .

The condenser cover plate 53 has a cooling coil 51 as a coil support bracket 51a, and an eliminator 55 composed of several members including a part of the medium-concentration absorbent flow path L1 previously mounted inside the condenser cover plate 53. A condenser assembly is formed. Note that both ends of the cooling coil 51 are arranged adjacent to the outer peripheral portion of the condenser cover plate 53 as an inflow portion and an outflow portion to the condenser 5, respectively.

The condenser 5 having the above structure is provided with a refrigerant reservoir 1 of a refrigerant recovery tank 10 through a refrigerant flow path L5 provided with an orifice (not shown) for restricting the flow rate of the refrigerant.
0a, and also communicates with the low-temperature regenerator 2 through the refrigerant vapor outlet 21 and the gap 5A, and the refrigerant is supplied by a pressure difference (about 70 mmHg in the condenser case).

In the condenser 5, the refrigerant vapor supplied into the condenser case 50 is cooled by the cooling coil 51 and liquefied. Refrigerant liquid receiving part 50 provided at the lower part of condenser 5
a and the refrigerant liquid dispersing device 42 disposed above the evaporating coil 41 of the evaporator 4 are communicated with each other through a refrigerant liquid supply path L6.
The liquefied refrigerant liquid is supplied to the refrigerant liquid supply passage L6 and the refrigerant cooler 5
4, and is supplied to the refrigerant liquid dispersing tool 42.

With the above configuration, the absorbent is supplied to the high-temperature regenerator 1 → the medium-concentration absorbent flow path L1 → the low-temperature regenerator 2 → the high-concentration absorbent liquid flow path L2 → the high-concentration absorbent liquid sprayer 32 → the absorber 3 → It circulates in the order of the absorbent pump P 1 → the low concentration absorbent flow path L 3 → the high temperature regenerator 1. The refrigerant is a high-temperature regenerator 1 (refrigerant vapor) → refrigerant flow path L5 (refrigerant vapor) or a low-temperature regenerator 2 (refrigerant vapor) → condenser 5 (refrigerant liquid) → refrigerant supply path L6 (refrigerant liquid) → refrigerant It circulates in the order of the liquid sprayer 42 (refrigerant liquid) → evaporator 4 (refrigerant vapor) → absorber 3 (absorbing liquid) → absorbing liquid pump P 1 → low-concentration absorbing liquid flow path L 3 → high temperature regenerator 1.

The absorption coil 31 of the absorber 3 for exchanging heat with the absorption liquid and the cooling coil 51 of the condenser 5 are connected to form a continuous coil. The cooling water circulation path is formed by being connected to the CT. In this cooling water circuit, the absorption coil 3
A cooling water pump P2 for sending cooling water into the continuous coil is provided in a cooling water flow path 34 between the inlet of the cooling tower CT and the cooling tower CT.
The cooling water which passes through the continuous coil by the operation of the cooling water pump P2 absorbs the heat of absorption by the absorption coil 31 and the heat of condensation by the cooling coil 51, and becomes relatively high in temperature. Supplied to CT.

With the above configuration, during the cooling operation, the cooling water in the cooling tower CT is operated in the order of the cooling tower CT → the cooling water pump P2 → the absorption coil 31 → the cooling coil 51 → the cooling tower CT by the operation of the cooling water pump P2. Circulate. In the cooling tower CT, self-cooling is performed in which the falling cooling water is partially evaporated into the atmosphere to cool the remaining cooling water.
An exhaust heat cycle is formed in which the heat is released into the atmosphere to lower the temperature. Note that the air from the blower S promotes the evaporation of water.

The evaporator coil 41 of the evaporator 4 includes an indoor unit R
The air-conditioning heat exchanger 44 provided in U is connected by a cold / hot water flow path 47, and the cold / hot water pump P3 is connected to the cold / hot water flow path 47.
Is provided. With the above configuration, the evaporating coil 41
The low temperature hot and cold water circulates in the order of the evaporating coil 41 → the cold and hot water channel 47 → the air conditioning heat exchanger 44 → the cold and hot water channel 47 → the cold and hot water pump P3 → the evaporating coil 41.

The indoor unit RU is provided with an air-conditioning heat exchanger 44 and a blower 46 for allowing the room air to pass through the heat exchanger 44 and blowing the indoor air again.

The heating absorption liquid flow path L4 and the cooling / heating switching valve 6 are provided for heating operation. During the heating operation, the cooling / heating switching valve 6 is opened and the absorption liquid pump P1 is operated. As a result, the high-temperature medium-concentration absorbing liquid in the absorbing liquid partitioning vessel 13 in the medium-concentration absorbing liquid separating cylinder 12 flows into the evaporator 4, and the cold and hot water in the evaporating coil 41 is heated, and the heated evaporation The cold and hot water in the coil 41 is supplied from the cold and hot water channel 47 to the air conditioning heat exchanger 44 by the operation of the cold and hot water pump P3, and serves 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 plate 40, passes through the low-concentration absorbing liquid flow path L3, and passes through the absorbing liquid pump P1.
To return to the heating tank 11.

In the air conditioner of the present embodiment having the above-described structure, the absorption coil 31 provided in the absorber 3
The cooling water for exhaust heat flowing through the inside is absorbed by the absorption coil 31 and the condenser 5.
The flow rate of the cooling water flowing through the inner absorption coil 31b having a small heat exchange surface area is reduced by the orifice 314 formed in the junction elbow 313 connecting the inside cooling coil 51 to the outer absorption coil 31a having a large heat exchange surface area. Since the flow rate is adjusted so as to be smaller than the flow rate of the flowing cooling water, the flow rate can be adjusted to a flow rate corresponding to the flow rate of the absorbing liquid flowing down each of the absorption coils 31a and 31b. Therefore, there is no difference in the efficiency of heat exchange between the two absorption coils 31a and 31b, and the cooling water having substantially the same temperature is added to the condenser 5 after the merging.
To the cooling coil 51.

The merge elbow 313 for adjusting the flow rate of the two absorption coils 31a and 31b is always provided for connecting the absorption coil 31 and the cooling coil 51. Since it is not separately provided for adjusting the flow rate, if the orifice 314 is formed in advance in the merge elbow 313 when the merge elbow 313 is formed, the labor required in the assembly process increases in order to adjust the flow rate. Therefore, the means for adjusting the flow rate can be easily incorporated. Therefore, there is no need to perform operations such as attaching and joining members for adjusting the flow rate in the absorption coil 31, and the assembling operation does not become complicated.

In the above embodiment, the orifice 314 is formed in the merging elbow 313 to adjust the flow rate of the absorbing coil 31. However, as shown in FIG.
An orifice is formed in the outflow conduit 315b connected to the inner absorption coil 31b in the branch elbow 315 connected to the first inlet so that the flow rate of the cooling water flowing through the inner absorption coil 31b is reduced. The flow rate may be adjusted. In each of the above embodiments, the cooling tower CT of the cooling water flow path 34 is an open type in which a part of the cooling water is evaporated to self-cool the cooling water. A water cooling device that forms a closed circuit that is not open to the atmosphere may be used. In the above embodiment, the indoor unit RU is provided with only the air conditioning heat exchanger 44. However, in order to perform the dehumidifying operation without lowering the indoor temperature, the air conditioning heat exchanger 4 is provided.
A heating heat exchanger for heating the air once cooled in step 4 may be arranged in parallel with the air conditioning heat exchanger 44. In the above embodiment, the air conditioner using the absorption refrigeration apparatus has been described.
It may be used for other refrigerators such as refrigerators and freezers. In the above embodiment, the double-effect type has been described, but a single-effect type may be used. As a heating source, an oil burner or an electric heater may be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner showing an embodiment of the present invention.

FIG. 2 is an assembly diagram showing an internal structure of an absorber in the air conditioner according to the embodiment of the present invention.

FIGS. 3A and 3B are diagrams showing a merging elbow of an absorber in an air conditioner according to an embodiment of the present invention, wherein FIG. 3A is a side view and FIG. 3B is a cross-sectional view taken along line BB in FIG.

FIG. 4 is a partial cross-sectional view of a refrigerator main body showing a combination part with a condenser and an evaporator in the embodiment of the present invention.

FIG. 5 is an assembly diagram showing an absorber and a branch elbow in an air conditioner showing another embodiment of the present invention.

[Explanation of symbols]

 101 Refrigerator body (absorption refrigeration system) 1 High temperature regenerator 2 Low temperature regenerator 3 Absorber 31 Absorption coil (plurality of piping members) 313 Merging elbow (branch structural member, connecting member) 314 Orifice (flow rate adjusting structure) 34 Cooling water flow path (external pipe for cooling water) 4 Evaporator 5 Condenser 51 Cooling coil (cooling pipe) P1 Absorbent pump

Claims (5)

[Claims] 1. A regenerator that heats an absorbent containing a refrigerant to separate refrigerant vapor from the absorbent, a condenser that cools and condenses the refrigerant vapor separated by the regenerator, An evaporator for evaporating the condensed refrigerant liquid under a low pressure; and a cooling water for absorbing the refrigerant vapor evaporated by the evaporator into the absorbing liquid supplied from the regenerator and absorbing the heat generated during the absorption. An absorber having a heat exchange pipe disposed therein and a pump for returning the absorbent from the absorber to the regenerator, wherein an absorption cycle is formed. A plurality of pipe members having different heat exchange surface areas forming a plurality of flow paths in the absorber are provided as pipes, and a branch structure member having a branch structure for branching or merging the single flow path and the plurality of flow paths. Through Then, the plurality of piping members of the absorber are connected to a single external pipe for cooling water provided outside the absorber, and the plurality of piping members pass through the branch structure member. An absorption refrigerating apparatus, comprising a flow rate adjusting structure for adjusting a flow rate of cooling water to be adjusted to a flow rate corresponding to each heat exchange surface area of the plurality of pipe members. 2. The absorption refrigeration system according to claim 1, wherein the plurality of piping members of the absorber have a multi-coil shape wound concentrically with different winding diameters. 3. The absorption refrigeration system according to claim 1, wherein said flow rate adjusting structure is an orifice structure formed in said plurality of flow paths branched from said branch structure member. 4. A cooling water pipe is provided inside the condenser, and the branch structure member includes a plurality of pipe members in the absorber and the single cooling water pipe in the condenser. 2. A connecting member for connecting the two.
4. The absorption refrigeration apparatus according to any one of claims 1 to 3. 5. The condenser is disposed above the absorber, and the branching structural member is disposed adjacent to the plurality of piping members in the absorber on a side of the absorber and the condenser. The absorption refrigeration apparatus according to any one of claims 1 to 4, wherein the elbow is an elbow provided to connect the single cooling water pipe in the vessel.