JP3408116B2 - Absorption refrigeration equipment - Google Patents

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 having an absorption cycle in which an aqueous solution of lithium bromide or the like is used as an absorption liquid, and more particularly, cold / hot water cooled in an evaporator and supplied to a cooling target. The small-sized absorption type refrigerating device having a structure in which the cold / hot water pipe through which is passed is arranged near the lower part of the high-concentration absorbent sprayer for dropping the high-concentration absorbent in the absorber.

[0002]

2. Description of the Related Art In an absorption refrigerating apparatus, a burner in a regenerator heats a low-concentration absorption liquid to bring it to a boil, thereby separating a high-concentration absorption liquid and a 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 an absorption tube (absorption coil) in the absorber.
When the refrigerant liquid is sprayed on the surface of the evaporator and the refrigerant liquid is sprayed on the evaporator pipe (evaporation coil) in the evaporator provided in communication with the absorber, the refrigerant liquid is vaporized from the cold / hot water passing through the inside of the evaporator pipe on the surface of the evaporator pipe. It takes heat and evaporates, while on the surface of the absorption tube,
The high-concentration absorbent absorbs the refrigerant vapor and generates heat.

The cold / hot water from which heat has been removed in the evaporation pipe circulates through the heat exchanger provided in the object to be cooled by the operation of the pump and becomes a cooling source in the object to be cooled. On the contrary, the cold / hot water whose temperature has risen in the heat exchanger is cooled again in the evaporation pipe. 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 cools it. Emitted in the tower. The absorption cycle is configured such that the absorption liquid that has absorbed the refrigerant liquid in the absorber and has been reduced in concentration returns to the regenerator by the absorption liquid pump.

In the absorption refrigerating apparatus having the above structure, in order to efficiently supply the refrigerant vapor generated in the evaporator from the evaporator to the absorber, the evaporator is concentrically connected to the outside of the absorber. In some cases, the absorbing liquid and the refrigerant liquid are dropped on the coils in the absorber and the evaporator, respectively. Here, the high-concentration absorption liquid supplied into the absorber is the absorption liquid heated in the regenerator to have a high concentration,
Since the temperature is high, when it is supplied into the low-pressure absorber, it may boil and the scattered high-concentration absorption liquid may adhere to the nearby evaporation coil.

When the scattered high-concentration absorption liquid adheres to the evaporation coil, the absorption of the absorption liquid accompanied by heat generation occurs on the surface of the evaporation coil, so that the cooling capacity of the evaporator is significantly reduced. Also, this problem will continue for a long time until the absorbing liquid disappears from the surface of the evaporation coil,
It becomes impossible to cool for a long time. For this reason, conventionally, a heat exchanger for exchanging heat with the low-concentration absorbent that has been reduced in concentration and cooled in the absorber is provided in the high-concentration absorbent flow path from the regenerator to the absorber. It is provided so that the temperature of the high-concentration absorption liquid is lowered by this heat exchanger and then supplied to the absorber.

[0006]

As described above, in order to lower the temperature of the high-concentration absorption liquid supplied to the absorber, heat exchange is performed with the low-concentration absorption liquid lowered in the absorber. However, in order to reliably lower the temperature of the high-concentration absorbent with the heat exchanger, it is necessary to make the heat exchange area sufficiently large to increase the size of the heat exchanger itself. This causes adverse effects such as increase and cost increase, and becomes an obstacle to downsizing of the absorption refrigeration system.

The present invention is an inexpensive absorption type refrigeration system capable of reliably lowering the temperature of the highly concentrated absorption liquid supplied from the regenerator to the absorber without increasing the size of the absorption type refrigeration system. The purpose is to provide a device.

[0008]

According to a first aspect of the present invention, a regenerator for heating an absorption liquid containing a refrigerant to separate a refrigerant vapor from the absorption liquid, and a refrigerant vapor separated by the regenerator are provided. A condenser for cooling and condensing, a refrigerant liquid condensed by the condenser is dropped on the surface of the hot / cold water pipe through which cold / hot water for heat transfer passes, and an evaporator for evaporating in the casing under low pressure, and cooling water are A cooling water pipe passing through is provided in the same casing as the evaporator adjacent to the cold / hot water pipe, and a high-concentration absorption liquid supplied from the regenerator is dropped onto the surface of the cooling water pipe to increase the temperature. In an absorption type refrigeration system in which an absorption cycle is formed from an absorber that absorbs the refrigerant vapor evaporated in the evaporator in a concentrated absorption liquid and a pump that returns the absorption liquid from the absorber to the regenerator, in the absorber, To the surface of the cooling water pipe Upstream of the high concentration absorption solution spraying device for supplying the concentration absorption liquid, in order to cool by evaporation of high concentration absorption solution supplied from the regenerator, the high concentration absorption solution
Vapor opening for releasing refrigerant vapor generated by evaporation
On the side opposite to the arrangement side of the hot and cold water pipes in the evaporator
A substantially closed box-shaped high-concentration absorbent cooling container formed above is provided , and the supply inlet of the high-concentration absorbent cooling container is the regenerator.
High-concentration absorption liquid that supplies high-concentration absorption liquid from the above to the absorber
The technical means is that the flow path is connected to the outlet facing the inside of the absorber .

[0009]

According to a second aspect of the present invention , in the first aspect, the supply inlet and the supply outlet of the high-concentration absorbent cooling container are horizontally separated from each other, and the vapor opening is disposed apart from the supply inlet. What is a technical means.

According to a third aspect of the present invention, in the first or second aspect, the high-concentration absorbent cooling container is provided with an absorbing-droplet lowering means for dropping the high-concentration absorbent onto the surface of the cooling water pipe.
The technical means is to supply a high-concentration absorbing solution to the absorbing liquid drop lowering means from the supply outlet formed at the bottom.

With the above-described structure, in the present invention, when the absorbing liquid containing the refrigerant is heated in the regenerator, the refrigerant vapor is separated from the absorbing liquid and the refrigerant vapor separated in the regenerator is condensed in the condenser. It becomes a refrigerant liquid. On the other hand, the absorption liquid whose concentration has been increased in the regenerator by separating the refrigerant is supplied from the high-concentration absorption liquid flow path to the absorber. A high-concentration absorption liquid cooling container that cools the high-concentration absorption liquid by evaporation is connected to the high-concentration absorption liquid channel in the absorber. For this reason, the high-concentration absorbent that has become hot in the regenerator is self-cooled by the heat of vaporization when the boiling point drops and the refrigerant component evaporates due to the pressure drop in the highly-concentrated absorbent cooling container in the shape of a closed box. And the temperature drops. As a result, the high-concentration absorbent cannot be boiled for cooling without being scattered in the low-pressure absorber. The high-concentration absorbent cooling container cools the high-concentration absorbent itself by evaporating the refrigerant component, and does not cool it with other liquids using a heat exchanger, etc. You can Further, since the high-concentration absorbent liquid cooling container may be provided in the absorber by being connected to the high-concentration absorbent liquid flow path, the cost can be reduced. In addition, the steam opening is located on the hot and cold water piping of the evaporator.
Since it is installed on the side opposite to the side,
Boiled high-concentration absorption liquid splashes outside from the steam opening.
Even if such a case occurs, the scattered high-concentration absorbent will vaporize.
Does not adhere to the hot and cold water piping of the generator. Therefore, Takano
Increase the passage cross-sectional area such as width, height and diameter of the absorption liquid cooling container.
The width can be made smaller and the size can be significantly reduced.
It will be easy.

In the second aspect , the high-concentration absorbent supplied from the supply inlet into the cooling container for the high-concentration absorbent vigorously boils in the vicinity of the supply inlet while moving toward the supply outlet, but the vapor is released. Since the port is located away from the supply inlet, only the refrigerant vapor generated by boiling moves to the vapor opening port and is released from the high-concentration absorbent cooling container to the outside, where the boiling high-concentration absorbent is the vapor opening port. There is no scattering from.

[0014]

[0015]

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

The refrigerator main body 101 is mainly made of stainless steel to form an absorption cycle of a refrigerant and an aqueous solution of lithium bromide as an absorbing liquid, and is a high temperature regenerator having a gas burner B as a heating means provided below. 1 and a low-temperature regenerator 2 arranged so as to cover the outside of the high-temperature regenerator 1, and a double-effect regenerator, and absorptions arranged on the outer periphery of the low-temperature regenerator 2 in this order toward the outside. Bowl 3
The evaporator 4 and the condenser 5 arranged above the absorber 3 and the evaporator 4 on the outer periphery of the low temperature regenerator 2 are connected by some passages. The absorbing solution contains an inhibitor for suppressing corrosion due to the reaction between stainless steel and lithium bromide.

The high temperature regenerator 1 comprises a medium concentration absorbent separation column 1 above a heating tank 11 which is heated by a gas burner B.
2 is provided as an extension, and a vertical cylindrical airtight refrigerant recovery tank 10 is provided so as to cover the outer periphery of the medium concentration absorbent separation cylinder 12 from above.

Below the inside of the medium-concentration absorbent separation column 12,
An absorbent partitioning container 13 arranged at a distance from the inner wall of the medium-concentration absorbent separating column 12 is provided with several upper edges thereof joined to the inside of the medium-concentrating absorbent separating column 12.
Between the medium-concentration absorbent separating column 12 and the absorbent partition container 13, an absorbent rising passage 14 is formed in which the absorbent heated by the heating tank 11 rises.

In the medium-concentration absorbent separating column 12 above the absorbent partition 13 is provided an absorbent returning plate 15 for returning the absorbent rising in the absorbent rising passage 14.
The above-mentioned medium-concentration absorbent separating column 12 is used for this absorbent returning plate 1.
5 is composed of two members, an upper member located above 5 and a lower member located below, which are joined to the absorbent return plate 15 by welding.

At a side portion of the absorbent partitioning container 13, the low-temperature regenerator 2 is provided with a medium-concentration absorbent having a high concentration by separating the refrigerant.
The inlet of the medium-concentration absorbent liquid flow path L1 for supplying to the evaporator 4 is opened, and the bottom of the absorbent partition 13 is for supplying the heated absorbent into the evaporator 4 during heating operation. The inlet of the heating absorbent liquid flow path L4 is open.

Inside the lower part of the refrigerant recovery tank 10, there is provided a refrigerant partitioning cylinder 17 for forming a heat insulating gap 17a between the intermediate concentration absorbent separation tube 12 and the medium concentration absorbent separation tube 12.
Is joined to. As a result, the medium-concentration absorbent separation column 1
The heat in 2 is cut off, and the refrigerant in the refrigerant recovery tank 10 becomes
It is not 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 cylinder 17 is a refrigerant storage section 10a for storing the separated refrigerant, and the refrigerant storage section 10a has an inlet of a refrigerant flow path L5 communicating with the condenser 5. It is open.

With the above-described structure, in the high temperature regenerator 1, the low-concentration absorbent stored in the heating tank 11 is heated by the gas burner B to evaporate water as the refrigerant in the low-concentration absorbent to evaporate the refrigerant. As a vapor (steam), it is separated to the outside of the medium-concentration absorbent separation column 12, and the medium-concentration absorbent concentrated by evaporation of the refrigerant vapor is returned to the inside of the medium-concentration absorbent separation column 12 inside the absorbent partition 13. Medium concentration absorbent liquid flow path L
1 to supply to the low temperature regenerator 2. Further, the separated refrigerant vapor is recovered by 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, and a refrigerant vapor outlet 21 is provided around the ceiling of the low temperature regenerator case 20. Low temperature regenerator case 20
The top part of the ceiling is connected to the inside of the absorbent partition 13 inside the intermediate-concentration absorbent separating column 12 via the heat exchanger H by the intermediate-concentration absorbent liquid flow path L1.

An orifice (not shown) for limiting the flow rate of the medium-concentration absorption liquid flowing from the absorption-liquid partition container 13 to the low-temperature regenerator 2 is provided in the medium-concentration absorption liquid flow path L1. The medium-concentration absorbent is supplied into the container case 20 due to the pressure difference between the medium-concentration absorbent separating column 12.
(Approximately 70 mmHg in the low-temperature regenerator case 20, approximately 700 mmHg in the medium-concentration absorbent separation column 12)

As a result, in the low temperature regenerator 2, the medium concentration absorption liquid supplied into the low temperature regenerator case 20 is reheated by using the outer wall of the refrigerant recovery tank 10 as a heat source, and the medium concentration absorption liquid is regenerated. The vapor-liquid separation section 22 above 20 separates the refrigerant vapor and the high-concentration absorbent into the high-concentration absorbent receiving section 23. At the bottom of the high-concentration absorbent receiving part 23, an inlet of the 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 evaporation / absorption case 30 is concentrically arranged in the lower part, and a condenser case 50 is concentrically arranged in the upper part. The low-temperature regenerator case 20 and the evaporation / absorption case 30 are integrally welded to the bottom plate portion 18, and the inner end of the bottom plate portion 18 is welded to the outer peripheral surface of the lower member 12b of the medium-concentration absorbent separation column 12. To form the refrigerator body 101. 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 inside portion of the evaporation / absorption case 30 and the low temperature regenerator case 20, and cooling water for exhaust heat flows inside. The absorption coil 31 wound in a coil shape is disposed as the above, and the high concentration absorbent is absorbed above the absorption coil 31.
A high-concentration absorbent sprayer 32 for spraying is arranged.

As shown in FIG. 2, the high-concentration absorbent dispersion device 32 has a high-concentration absorbent flow path L2 connected to the high-concentration absorbent receiving part 23 of the low temperature regenerator 2 via a heat exchanger H. Each of a high-concentration absorption liquid cooling container 32a for cooling and storing the high-concentration absorption liquid supplied through it, and an absorption coil 31 in which the absorption liquid stored in the high-concentration absorption liquid cooling container 32a is wound inside and outside twice. It is composed of two absorption liquid dispersion pipes 32b that are double formed in order to evenly distribute and drip on the circumference.

The high-concentration absorbent cooling container 32a has an arc shape as shown in FIG. 3, and as shown in FIG. 4, the dish-shaped member 321 forming the bottom of the container and the dish-shaped member 321 are covered and covered. And a cover member 322 for forming the airtight combination, and the cover member 322 is formed with a supply inlet 324a to which the supply pipe 323 forming the high-concentration absorbent liquid flow path L2 is airtightly joined. The member 321 is provided with a supply outlet 324b for flowing down and supplying the high-concentration absorption liquid to the absorption liquid dispersion pipe 32b arranged below. Two elongated steam outlet galleries 325 are formed in the arc-shaped inner upper portion of the cover member 322 as shown in FIGS. 3 and 5. With the above configuration, the high-concentration absorbent cooling container 32a forms a substantially sealed box-like flow path in which the high-concentration absorbent moves substantially horizontally between the supply inlet 324a and the supply outlet 324b. Become.

With the above-described structure, in the absorber 3, the high-concentration absorbing liquid in the high-concentrating absorbing liquid receiving portion 23 of the low-temperature regenerator 2 flows from the high-concentration absorbing liquid flow path L2 to the high-concentration absorbing liquid spraying tool 32 due to the pressure difference. Inflow. Since the high-concentration absorbent sprayer 32 is arranged in the evaporation / absorption case 30 under a low pressure, the heat exchanger H
If the temperature is higher than the boiling point of the high-concentration absorbent at the pressure in the evaporation / absorption case 30 even if the high-concentration absorbent is cooled to some extent,
While moving the plate-shaped member 321 of 2a from the supply inlet 324a side to the supply outlet 324b, the high-concentration absorbent cooling container 3
Boils within 2a. At this time, the generated refrigerant vapor flows from the vapor outlet gallery 325 into the high-concentration absorbent cooling container 32a.
It flows out.

Further, since the vapor outlet gallery 325 is arranged on the supply outlet 324b side (downstream side) in the high-concentration absorbent cooling container 32a and is provided away from the supply inlet 324a, the supply inlet that boiles most violently. 32
The vicinity of 4a is covered, and the boiled high-concentration absorbent is less likely to be scattered from the steam outlet gallery 325. In addition, even if the high-concentration absorption liquid scatters from the steam outlet gallery 325 due to boiling of the high-concentration absorption liquid in the high-concentration absorption liquid cooling container 32a, the steam outlet gallery 325 is provided with the absorption coil 31.
Since it is formed toward the inside of the absorption coil 31, the scattered high-concentration absorption liquid does not adhere to the evaporation coil 41 toward the outside of the absorption coil 31.

The high-concentration absorption liquid supplied to the high-concentration absorption liquid cooling container 32a in the evaporation / absorption case 30 while the temperature is not sufficiently lowered is self-cooled by the heat of evaporation in the high-concentration absorption liquid cooling container 32a. The temperature is lowered to a temperature at which it does not boil and is supplied to the absorbent dispersion pipe 32b. The high-concentration absorption liquid is sprayed from the high-concentration absorption liquid dispersion pipe 32b to the upper end of each absorption coil 31, adheres to the surface of the absorption coil 31 to form a thin film, and flows down by the action of gravity to absorb water vapor. And becomes a low concentration absorbent. Although heat is generated on the surface of the absorption coil 31 when absorbing the water vapor, it is cooled by the exhaust heat cooling water circulating in the absorption coil 31. The water vapor absorbed by the absorbing liquid is generated as a refrigerant vapor in the evaporator 4 described later.

The bottom portion 33 of the absorber 3 is connected to the bottom portion of the heating tank 11 by a low-concentration absorbent liquid flow path L3 equipped with a heat exchanger H and an absorbent liquid pump P1. The low-concentration absorption liquid in the absorber 3 is supplied into the heating tank 11. Further, in the absorption coil 31, the cooling water for exhaust heat cooled in the cooling tower CT circulates during the cooling operation.

The evaporator 4 is provided on the outer circumference of a vertical cylindrical cylindrical partition plate 40 provided with a large number of communication ports (not shown) provided on the outer circumference of the absorption coil 31 in the evaporation / absorption case 30, and for cooling and heating the inside. A vertical cylindrical evaporation coil 41 made of a copper tube through which cold / hot water flows is arranged, and a refrigerant liquid spraying tool 42 is mounted above it. The bottom 43 of the evaporator 4 communicates with the bottom of the absorbent partition 13 in the medium-concentration absorbent separating column 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 made to flow down from the refrigerant liquid spraying tool 42 onto the evaporation coil 41 during the cooling operation, the refrigerant liquid that has flowed down is caused by the surface tension of the evaporation coil. The surface of 41 is wetted to form a film, which is lowered by the action of gravity to a low pressure (for example, 6.5 mm).
In the evaporation / absorption case 30 of Hg), heat of vaporization is taken from the evaporation coil 41 to evaporate, and the cold water for air conditioning flowing in the evaporation coil 41 is cooled.

Next, the condenser 5 will be described. The condenser 5 is
Inside the condenser case 50, a cooling coil 51 is arranged in which cooling water for exhaust heat cooled by the cooling tower CT circulates. As shown in FIG. 2, the condenser case 50 covers a boundary plate 52 that closes the upper opening of the evaporation / absorption case 30 and forms the bottom of the condenser case 50, and forms a condenser chamber by 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 the liquefied refrigerant liquid of the refrigerant vapor cooled by the cooling coil 51 in the condenser case 50 is provided, and the refrigerant liquid receiving portion 50a is below the boundary plate 52 and is an absorber. A boundary plate assembly is formed by pre-assembling together with the high-concentration absorbent sprayer 32 of No. 3 and the refrigerant cooler 54 provided for cooling the refrigerant to be sprayed to the evaporation coil 41 of the evaporator 4. .

In the condenser cover plate 53, the cooling coil 51 is the coil support fitting 51a, and the eliminator 55 composed of several members including a part of the medium-concentration absorbent liquid flow path L1 is previously assembled inside the condenser cover plate 53. A condenser assembly is formed. 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.

In the condenser 5 having the above structure, the refrigerant storage section 1 of the refrigerant recovery tank 10 is provided by the refrigerant flow path L5 provided with an orifice (not shown) for limiting the refrigerant flow rate.
0a, and also communicates with the low temperature regenerator 2 via the refrigerant vapor outlet 21 and the gap 5A, both of which are supplied with refrigerant 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 receiver 50 provided at the bottom of the condenser 5
The refrigerant liquid sprayer 42 disposed above the evaporation coil 41 of the evaporator 4 is in communication with the refrigerant liquid supply path L6.
The liquefied refrigerant liquid is supplied to the refrigerant liquid supply path L6 and the refrigerant cooler 5
It is supplied to the refrigerant liquid spraying tool 42 via 4.

With the above-described structure, the absorbing liquid is stored in the high temperature regenerator 1 → the medium concentration absorbing liquid flow path L1 → the low temperature regenerator 2 → the high concentration absorbing liquid flow path L2 → the high concentration absorbing liquid cooling container 32a → the absorbing liquid dispersion pipe. 32b → absorber 3 → absorption liquid pump P1 → low concentration absorption liquid flow path L3 → high temperature regenerator 1 in this order. The refrigerant is the high temperature regenerator 1 (refrigerant vapor) → refrigerant flow path L5 (refrigerant vapor) or low temperature regenerator 2 (refrigerant vapor) → condenser 5 (refrigerant liquid) → refrigerant supply path L6 (refrigerant liquid) → refrigerant. Liquid sprayer 42
(Refrigerant liquid) → evaporator 4 (refrigerant vapor) → absorber 3 (absorption liquid) → absorption liquid pump P1 → low concentration absorption liquid flow path L3 → high temperature regenerator 1 in this order.

The absorption coil 31 of the absorber 3 and the cooling coil 51 of the condenser 5 which exchange heat with the absorbing liquid are connected to form a continuous coil, and the continuous coil is formed by the cooling water passage 34 in the cooling tower. It is connected to CT to form a cooling water circulation path. In this cooling water circulation path, the absorption coil 3
In the cooling water flow path 34 between the inlet of 1 and the cooling tower CT, a cooling water pump P2 for feeding the cooling water into the continuous coil.
The cooling water passing through the continuous coil by the operation of the cooling water pump P2 absorbs the absorption heat in the absorption coil 31 and the condensation heat in the cooling coil 51, respectively, and becomes relatively high temperature. Supplied to CT.

With the above construction, during the cooling operation, the cooling water in the cooling tower CT is operated by the cooling water pump P2 in the order of cooling tower CT → cooling water pump P2 → absorption coil 31 → cooling coil 51 → cooling tower CT. Circulate. In the cooling tower CT, self-cooling is performed to partially evaporate the cooling water that falls into the atmosphere and cool the remaining cooling water.
It forms an exhaust heat cycle that radiates heat to the atmosphere and lowers the temperature. Note that the blowing of air from the blower S promotes the evaporation of water.

The evaporation coil 41 of the evaporator 4 includes an indoor unit R
The air conditioning heat exchanger 44 provided in U is connected by the cold / hot water flow path 47, and the cold / hot water flow path 47 has a cold / hot water pump P3.
Is provided. With the above configuration, the evaporation coil 41
The cold / hot water having a low temperature circulates in the order of the evaporation coil 41 → the cold / hot water passage 47 → the air conditioning heat exchanger 44 → the cold / hot water passage 47 → the cold / hot water pump P3 → the evaporation coil 41. Indoor unit RU
In addition to the air conditioning heat exchanger 44, a blower 46 that allows indoor air to pass through the heat exchanger 44 and blows the indoor air again is provided.

The heating absorbent flow path L4 and the heating / cooling switching valve 6 are provided for heating operation. During heating operation, the cooling / heating switching valve 6 is opened and the absorption pump P1 is operated. As a result, the high-temperature medium-concentration absorption liquid in the absorption-liquid partition container 13 in the medium-concentration absorption liquid separation cylinder 12 flows into the evaporator 4, and the cold / hot water in the evaporation coil 41 is heated and the heated evaporation is performed. The cold / hot water in the coil 41 is supplied from the cold / hot water passage 47 to the air conditioning heat exchanger 44 by the operation of the cold / hot water pump P3, and serves as a heat source for heating. The medium-concentration absorption liquid in the evaporator 4 enters the absorber 3 side from the communication port of the partition plate 40, passes through the low-concentration absorption liquid channel L3, and then the absorption liquid pump P1.
Is returned to the heating tank 11.

As described above, in the present invention, the evaporation / absorption case 3 is removed from the low temperature regenerator 2 by the high-concentration absorbent liquid flow path L2.
Since the absorption liquid cooling container 32a forming a substantially closed box-shaped flow path that self-cools by evaporation is connected to the flow path of the high-concentration absorption liquid supplied to the absorption coil 31 in 0, The heat capacity of the heat exchanger H provided in the flow path can be reduced, and thus the heat exchanger H can be downsized.

Further, the steam outlet gallery 3 for letting out the steam generated when the high-concentration absorbent is boiled in the high-concentration absorbent cooling container 32a to the outside of the high-concentration absorbent cooling container 32a.
Since 25 is formed toward the inner side of the absorption coil 31 on the side opposite to the side on which the evaporation coil 41 is arranged, when the high-concentration absorption liquid boils in the high-concentration absorption liquid cooling container 32a. In addition, even if the high-concentration absorbent is scattered from the vapor outlet gallery 325, it does not adhere to the evaporation coil 41. Therefore, the cooling capacity is not deteriorated due to the adhesion of the high-concentration absorption liquid to the evaporation coil 41. Further, a cover member 322 is provided on the absorbent cooling container 32a,
Since the vapor outlet gallery 325 is formed here, the height can be made smaller as compared with the case where the absorption liquid cooling container 32a is simply opened like a gutter, so that the size can be greatly reduced. .

In each of the above embodiments, the cooling tower CT of the cooling water passage 34 is an open type in which a part of the cooling water is evaporated to self-cool the cooling water. The water cooling device may be a water cooling device that forms a closed circuit in which the water is not exposed to the atmosphere. In the above embodiment, the indoor unit RU is provided with only the air conditioning heat exchanger 44, but in order to perform the dehumidifying operation without lowering the indoor temperature, the air once cooled by the air conditioning heat exchanger 44 is heated. The heating heat exchanger may be arranged in parallel with the air conditioning heat exchanger 44. Although the air conditioner using the absorption type refrigerating device is shown in the above embodiment, it may be used for other refrigerating devices such as a refrigerator and a freezer. In the above-described embodiment, the double-effect formula has been described, but the single-effect formula may be used. A petroleum burner or an electric heater may be used as the heating source.

[Brief description of drawings]

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

FIG. 2 is a partial cross-sectional view of the refrigerator main body showing a combined portion with the condenser and the evaporator in the embodiment of the present invention.

FIG. 3 is a plan view showing a high-concentration absorbent cooling container according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line CC of FIG.

FIG. 5 is an assembly diagram showing the internal structure of the absorber in the embodiment of the present invention.

[Explanation of symbols]

101 Refrigerator body (absorption type refrigeration system) 1 High temperature regenerator 2 Low temperature regenerator 3 Absorber 30 Evaporation / absorption case (casing under low pressure, same casing as evaporator) 31 Absorption coil (pipe for cooling water) 32 High concentration Absorbing liquid disperser 32a High-concentration absorbing liquid cooling container (substantially closed box-shaped high-concentrating absorbing liquid cooling container) 32b Absorbing liquid dispersing pipe (absorption droplet lowering means) 322 Cover member 324a Supply inlet (outlet facing the absorber) 324b Supply outlet 325 Steam outlet gallery (steam opening port) 4 Evaporator 41 Evaporation coil (cold / hot water pipe) 5 Condenser P1 Absorption liquid pump L2 High-concentration absorption liquid flow path

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-340069 (JP, A) JP-A-9-60995 (JP, A) International Publication 98/41798 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 37/00

Claims (3)

(57) [Claims] 1. A regenerator that heats an absorbing liquid containing a refrigerant to separate a refrigerant vapor from the absorbing liquid, a condenser that cools and condenses the refrigerant vapor separated by the regenerator, and a condenser. An evaporator that drops the condensed refrigerant liquid on the surface of the hot and cold water pipes through which the cold water for heat transfer passes and evaporates in the casing under low pressure, and a pipe for cooling water through which cooling water passes are adjacent to the cold and hot water pipes. Then, provided in the same casing as the evaporator, the high-concentration absorption liquid supplied from the regenerator is dropped on the surface of the cooling water pipe, and the refrigerant vapor evaporated in the evaporator is added to the high-concentration absorption liquid. In an absorption type refrigeration system in which an absorption cycle is formed from an absorber that absorbs and a pump that returns the absorption liquid from the absorber to the regenerator, a high concentration absorption liquid is applied to the surface of the cooling water pipe in the absorber. High concentration absorption liquid supply Upstream of the ingredients, the high concentration absorption solution supplied from the regenerator to cool by evaporation, to release the refrigerant vapor produced by evaporation of the high concentration absorption solution
A steam outlet for the cold and hot water piping in the evaporator
A high-concentration absorbent cooling container in the shape of a substantially closed box , which is formed above the side opposite to the arrangement side, is provided.
The inlet supplies high-concentration absorbent from the regenerator to the absorber.
At the outlet facing the inside of the absorber of the high-concentration absorbent liquid flow path to be supplied
An absorption type refrigeration system characterized by being connected . 2. The supply of the high-concentration absorbent cooling container
The mouth and the supply outlet are horizontally separated and
The steam opening is located away from the supply inlet.
The absorption refrigerating apparatus according to claim 1, wherein the absorption refrigerating apparatus is provided. 3. The high-concentration absorbent cooling container is provided at a lower part of the container.
Absorption liquid that drops high-concentration absorption liquid on the surface of the cooling water pipe
Equipped with drip means, from the supply outlet formed at the bottom to the front
Characterized by supplying a high-concentration absorption liquid to the means for absorbing liquid drops
The absorption refrigeration system according to claim 1 or 2.