JPH0413064A - Absorption type water cooler/heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a water chiller/heater that supplies cold water and hot water to various types of heat utilization equipment, and aims to provide an absorption type water chiller/heater that does not require heating equipment when separating refrigerant. It has a heat exchanger tube and a refrigerant distribution tube that distributes refrigerant to the heat exchanger tube, an evaporator that cools the water in the heat exchanger tube by evaporation of the refrigerant, an absorption liquid distribution tube that distributes an absorption liquid, and a cooling tube that flows cooling water. A regenerator that has an absorber that absorbs refrigerant vapor into the dispersed absorption liquid, a pump that collects and applies pressure to the absorption liquid in which the refrigerant has been absorbed, and a reverse osmosis membrane unit that separates the refrigerant from the absorption liquid. and a cooler having a cooling pipe communicating with the outlet of the cooling pipe of the absorber and cooling the refrigerant.

[Industrial application field]

The present invention relates to a water chiller/heater that supplies cold water and hot water to various types of heat utilization equipment, and particularly relates to an absorption type water chiller/heater that does not require heating equipment when separating a refrigerant.

Absorption-type water cooler/heater has less vibration and noise than water cooler/heater that uses a compressor or electric heater, and is used in heat utilization equipment such as semiconductor manufacturing factories where noise and even the slightest vibration are considered a problem. It is widely used as a means of supplying hot water.

However, the absorption type water chiller/heater currently in use requires an external heat source such as steam supplied from a boiler when separating the refrigerant, so there is a problem that it cannot be used in places without a means to supply a heat source. Therefore, there is a need for the development of an absorption type water chiller/heater that does not require an external heat source when separating the refrigerant.

[Conventional technology]

FIG. 2 is a schematic diagram showing a conventional absorption type water chiller/heater.

In the figure, the conventional absorption type water chiller/heater has two vacuum containers 1 and 2, and the vacuum container 1, which has a low internal pressure (about 7 mmHg), has an evaporator 3 and an absorber 4 built therein. The evaporator 3 consists of a heat exchanger tube 31 through which cold water flows and a refrigerant distribution tube 32 that distributes refrigerant (water). 5℃
Cool to a certain degree.

The absorber 4 also includes an absorption liquid distribution pipe 41 for dispersing an absorption liquid such as an aqueous solution of lithium bromide (LiBr), and a cooling pipe 42 for removing absorption heat generated when the absorption liquid absorbs refrigerant vapor. By absorbing the refrigerant vapor generated in the evaporator 3 into the absorption liquid, the evaporation pressure inside the vacuum container 1 is kept constant and continuous evaporation is possible.

On the other hand, vacuum container 2 with high internal pressure (about 75 mm and 1 g)
has a built-in regenerator 5 and a condenser 6, and the absorbed liquid that has absorbed the refrigerant in the absorber 4 and accumulated at the bottom of the vacuum container 1 is pumped up by a pump 7 and sent to the regenerator 5 via piping 71. Supplied.

The regenerator 5 has heat transfer tubes 5 through which steam supplied from an external heat source flows, and the absorption liquid formed by absorbing the refrigerant supplied to the regenerator 5 is heated and concentrated, and is deposited at the bottom of the vacuum container 2. The absorbent is returned to the absorber 4 via the open absorption liquid distribution pipe 41.

In addition, the condenser 6 has a cooling pipe 61 that cools the refrigerant that is separated from the absorption liquid as vapor when heating and concentrating the absorption liquid obtained by absorbing the refrigerant in the regenerator 5, and a cooling pipe 61 that cools the refrigerant that is separated from the absorption liquid and is liquefied. The liquefied refrigerant is returned to the evaporator 3 via the refrigerant distribution pipe 32 that is open to the receiver 62.

By repeating evaporation, absorption, regeneration, and condensation in this way and circulating the refrigerant and absorption liquid, the heat exchanger tubes 31 of the evaporator 3
Cold water can be extracted continuously. Further, the cooling pipe 61 of the condenser 6 is connected to the cooling pipe 42 of the absorber 4, and the cooling water supplied to the cooling pipe 42 absorbs absorbed heat from the absorption liquid in the absorber 4, and further vaporizes in the condenser 6. It takes away the latent heat of condensation from the refrigerant and turns it into hot water. That is, hot water can be continuously taken out from the cooling pipe of the condenser.

[Problem to be solved by the invention]

Absorption-type water chillers and hot water machines have low vibration and noise because they do not have moving parts such as compressors, and are a means of supplying cold and hot water to heat utilization equipment in semiconductor manufacturing factories and other places where noise and slight vibrations are considered a problem. However, conventional absorption type water chillers and hot water machines require an external heat source such as steam supplied from a boiler to separate the refrigerant, so they are used in places where there is no means to supply a heat source. There was a problem that it could not be used.

An object of the present invention is to provide an absorption type water chiller/heater that does not require heating equipment when separating the refrigerant.

[Means to solve the problem]

FIG. 1 is a schematic diagram showing an absorption type water chiller/heater according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above-mentioned problem has a heat exchanger tube 31 and a refrigerant distribution tube 32 that distributes refrigerant to the heat exchanger tube 31, and the heat exchanger tube
1, an absorber 4 having an evaporator 3 for cooling the water in the 1, an absorption liquid distribution pipe 41 for dispersing an absorption liquid, and a cooling pipe 42 for flowing cooling water, and for absorbing refrigerant vapor into the sprayed absorption liquid. ,
A pump 8 that collects the absorption liquid in which the refrigerant has been absorbed and applies pressure.
1, a regenerator 8 having a reverse osmosis membrane unit 82 that separates the refrigerant from the absorption liquid, and a cooler 9 having a cooling pipe 91 communicating with the outlet of the cooling pipe 42 of the absorber 4 and cooling the refrigerant. This is achieved by the absorption type water chiller/heater of the present invention comprising:

[For production]

In FIG. 1, there is shown a regenerator having a pump that collects and applies pressure to the absorption liquid in which refrigerant has been absorbed, a reverse osmosis membrane unit that separates the refrigerant from the absorption liquid, and a cooling pipe that communicates with the outlet of the cooling pipe of the absorber. The absorption type water chiller/heater of the present invention, which includes a cooler for cooling a refrigerant, does not need to be heated when separating the refrigerant from the absorption liquid in which the refrigerant is absorbed. That is, it is possible to realize an absorption type water chiller/heater that does not require heating equipment when separating the refrigerant.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIG.

In the figure, the absorption type water chiller/heater according to the present invention has a vacuum container 1, and an evaporator 3 and an absorber 4 are built into the vacuum container 1, which has a low internal pressure (about 7II1 mog). Evaporator 3
consists of a heat exchanger tube 31 through which cold water flows and a refrigerant distribution tube 32 that distributes refrigerant (water).The refrigerant sprinkled onto the heat exchanger tube 31 evaporates at an extremely low temperature and cools the cold water inside the heat exchanger tube 31 to 5°C. Cool to a certain degree.

The absorber 4 also includes an absorption liquid dispersion pipe 41 for dispersing an absorption liquid such as an aqueous solution of LiBr, a cooling pipe 42 for removing absorption heat generated when the absorption liquid absorbs refrigerant vapor, and an evaporator. By absorbing the refrigerant vapor generated in step 3 into the absorption liquid, the evaporation pressure inside the vacuum container 1 is kept constant and continuous evaporation is possible.

On the other hand, a regenerator 8 and a cooler 9 are disposed outside the vacuum vessel 1, and the regenerator 8 includes a pump 81 that collects and applies pressure to the absorption liquid in which the refrigerant has been absorbed from the vacuum vessel 1, and a pump 81 that applies pressure. The cooler 9 includes a reverse osmosis membrane unit 82 that separates refrigerant from liquid, and a cooling pipe 91 that communicates with the outlet of the cooling pipe 42 of the absorber 4.

The reverse osmosis membrane unit 82 has a reverse osmosis membrane 83 incorporated therein, and by pressurizing the absorption liquid in which refrigerant has been absorbed to a level higher than the osmotic pressure of the refrigerant using the pump 81, only the refrigerant absorbed in the absorption liquid is removed. It is extracted to the opposite side of the reverse osmosis membrane 83. Further, the absorbent liquid concentrated by separating the refrigerant is depressurized and returned to the absorber 4 via the absorbent liquid distribution pipe 41 that is open to the reverse osmosis membrane unit 82.

The extracted refrigerant is transferred to the opposite side of the reverse osmosis membrane 83 through the refrigerant distribution pipe 3
2 may be returned to the evaporator 3. However, the temperature of the refrigerant has increased due to pressurization by the pump 81, and the refrigerant is cooled by the cooling pipe 91 and returned to the evaporator 3 via the refrigerant distribution pipe 32.

By repeating the above evaporation, absorption, regeneration, and cooling and circulating the refrigerant and absorption liquid, cold water can be continuously taken out from the heat transfer tube 31 of the evaporator 3. The cooling pipe 91 of the cooler 9 is connected to the outlet of the cooling pipe 42 of the absorber 4, and the cooling water supplied to the cooling pipe 42 absorbs absorbed heat from the absorption liquid in the absorber 4, and further At step 9, latent heat is removed from the pressurized refrigerant and it becomes hot water. That is, hot water can be continuously taken out from the cooling pipe of the cooler.

A regenerator having a pump that collects and applies pressure to the absorption liquid in which the refrigerant has been absorbed, a reverse osmosis membrane unit that separates the refrigerant from the absorption liquid, and a cooling pipe that communicates with the outlet of the cooling pipe of the absorber. The absorption type water chiller/heater of the present invention, which includes a cooler for cooling a refrigerant, does not require heating when separating the refrigerant from the absorption liquid in which the refrigerant is absorbed.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide an absorption type water chiller/heater that does not require heating equipment when separating the refrigerant.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an absorption type water chiller/heater according to the present invention, FIG. 2 is a schematic diagram showing a conventional absorption type water chiller/heater. In the figure 1 is a vacuum container, 4 is an absorber, 9 is a cooler; 32 is a refrigerant distribution pipe; 42 is a cooling pipe; 82 is a reverse osmosis membrane unit, 91 is a cooling pipe, respectively. 3 is the evaporator, 8 is a regenerator, 31 is a heat exchanger tube, 41 is an absorption liquid distribution pipe; 81 is a pump, 83 is reverse osmosis membrane 1

Claims (1)

[Claims] an evaporator (3) having a heat exchanger tube (31) and a refrigerant distribution tube (32) for distributing a refrigerant to the heat exchanger tube (31), and cooling the water in the heat exchanger tube (31) by evaporating the refrigerant; , an absorber (4) having an absorption liquid dispersion pipe (41) for dispersing an absorption liquid and a cooling pipe (42) for flowing cooling water, and for absorbing the vapor of the refrigerant into the sprayed absorption liquid; A regenerator (8) having a pump (81) that collects and applies pressure to the absorbed absorption liquid, and a reverse osmosis membrane unit (82) that separates a refrigerant from the absorption liquid, and a cooling pipe of the absorber (4). (42
), and a cooler (9) for cooling a refrigerant.