JPH06201210A - Absorption refrigerator - Google Patents

Abstract

(57) [Abstract] [Purpose] An absorption chiller that can improve the heat exchange efficiency between the absorber and the condenser without using a complicated path structure and without increasing the pressure loss due to the increase in the number of paths. provide. [Structure] An absorber heat transfer tube 6 which is a plurality of paths through which cooling water flows in the absorber 5 is branched in the middle of the path, a water passage tube 6b which is a remaining path of the absorber 5, and a condenser. The water passage pipe 6a for passing water to 12 was provided in parallel, and the water passage pipe 6b after branching was provided with the spray 17 for spraying the concentrated solution refluxed from the high and low temperature regenerators 9, 10 to the absorber 5. [Effect] The cooling water passing through the branched absorber residual path exchanges heat with the high temperature concentrated solution, and the concentrated solution is sufficiently sparked.
The cooling water is discharged at an extremely low quality (high temperature) and the high-quality (low temperature) cooling water is distributed to the condenser, etc., and the heat exchange efficiency of the absorber and condenser is improved. Contribute to.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator,
In particular, it relates to an absorption refrigerator having a means for improving the heat exchange efficiency of the absorber and the condenser.

[0002]

2. Description of the Related Art A conventional absorption refrigerator is disclosed in, for example, Japanese Patent No. 1
As described in Japanese Patent Publication No. 305121 (Japanese Patent Publication No. 60-25709), an absorber having a plurality of paths through which cooling water flows is provided, and cooling water is guided to a condenser from a path immediately before the final path of the absorber, After passing through the condenser, the remaining path (final path) of the absorber is made to flow, and the concentrated solution concentrated in the regenerator is sprayed onto the final path of the absorber through the heat exchanger. Dispersing the cooled dilute solution with the dilute solution cooled in the other remaining pass of the absorber onto the remaining pass is disclosed. That is, most of the heat is removed by exchanging the cooling water flowing through the remaining path (final path) with a concentrated solution at a high temperature with a saturated pressure higher than the pressure inside the absorber that recirculates from the regenerator to the absorber. There is known a means for effectively exchanging heat between the low-quality cooling water passing through the remaining path of the absorber after the exchange and the concentrated solution having a high saturation pressure and a high temperature.

[0003]

In the above-mentioned prior art, there are problems that the path structure becomes complicated and the cost is high, and the pressure loss of the cooling water increases due to the increase in the paths. there were.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and does not use a complicated path structure and does not cause an increase in pressure loss due to an increase in the number of paths, and an absorber and a condenser. It is an object of the present invention to provide an absorption refrigerator that can improve the heat exchange efficiency with the.

[0005]

In order to achieve the above object, the constitution of the first invention relating to the absorption refrigerator according to the present invention is as follows:
Cooling water in an absorption refrigerator comprising an evaporator, an absorber having a plurality of paths, a high temperature regenerator, a low temperature regenerator, a solution heat exchanger, a solution pump, a refrigerant pump, and a piping system operatively connecting these. It is provided with a flow path that allows water to pass in parallel to the absorber and the condenser.

More specifically, a plurality of paths through which cooling water flows in the absorber are branched in the middle of the paths,
The remaining path of the absorber and the flow path for passing water to the condenser are arranged in parallel, and a means for spraying a concentrated solution refluxed from the regenerator to the absorber is provided in the remaining path of the absorber after branching. Be prepared.

In order to achieve the above object, the structure of the second invention relating to the absorption refrigerator of the present invention is an evaporator, an absorber having a plurality of paths, a high temperature regenerator, a low temperature regenerator,
A solution heat exchanger, a solution pump, a refrigerant pump, in an absorption refrigerator comprising a piping system for operatively coupling them, the absorber and the condenser are adjacently housed in the same heat exchanger cylinder, and While integrating the water chamber case of the absorber and the condenser, in the absorber, a plurality of paths through which cooling water flows, branch in the middle of the path, and the remaining path of the absorber. , The flow path for passing water to the condenser is arranged in parallel,
The absorber remaining path after branching is provided with a means for spraying a concentrated solution refluxed from the regenerator to the absorber.

[0008]

In the absorber having a plurality of paths through which the cooling water flows, the cooling water in the paths relating to the heat transfer tubes is branched into two at the stage when the heat exchange of the other is completed, and one of them is the condenser. To
The rest passes through the absorber residual path. Since the amount of heat exchange in the condenser is less than half of that in the absorber, the heat exchange in the condenser can be sufficiently satisfied even if there is not all the amount of cooling water passing through the absorber. By the way, since the concentrated solution refluxed from the regenerator to the absorber has a high temperature and a saturation pressure higher than the pressure inside the absorber, it has an adverse effect on flushing in the absorber and heat exchange in the absorber.

Therefore, in the absorber remaining path, the cooling water is
The solution is supercooled by heat exchange with the hot concentrated solution which is refluxed from the regenerator to the absorber. Since this concentrated solution has a high temperature and the sensible heat is about one tenth of the total heat exchange amount of the absorber, the supercool of the solution can be sufficiently reached even with a relatively small amount of branched cooling water, Moreover, the cooling water that has passed through the absorber residual path exchanges heat with the high temperature concentrated solution, and therefore flows out at a much higher temperature than the cooling water that normally passes through the condenser. In other words, in these effects, the cooling water that passes through the remaining path of the absorber branched in the middle plays a sufficient role, and is discharged at a very low quality (high temperature). Since the cooling water will be distributed, it contributes to the improvement of the heat exchange efficiency of the absorber and condenser.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Each embodiment of the present invention will be described below with reference to FIGS. 1 is a system diagram of an absorption chiller according to an embodiment of the present invention, FIG. 2 is a system diagram of an absorption chiller according to another embodiment of the present invention, and FIG. It is a systematic view explaining the cooling cycle of a refrigerator. First, a cooling cycle of a general absorption chiller will be described with reference to FIG. In FIG. 3, 1 is an evaporator, 3 is a refrigerant pump, 4 is an evaporator heat transfer tube through which cold water flows, 5 is an absorber, 6 is an absorber heat transfer tube associated with a plurality of paths through which cooling water flows, 7 is a solution pump, 8 is a solution heat exchanger, 9 is a high temperature regenerator, 10 is a low temperature regenerator, and 12 is a condenser.

The evaporator 1 is maintained at about one-hundredth atmospheric pressure, in which the refrigerant 2 (water) is the refrigerant pump 3 and the refrigerant pipe 1.
3 sprays the heat on the evaporator heat transfer tube 4, takes the heat of the cold water and evaporates it, thereby producing a cooling effect. The evaporated refrigerant vapor flows into the absorber 5, which is kept at a low pressure by cooling water,
Here, the aqueous solution of lithium bromide sprayed on the absorber heat transfer tube 6 is absorbed, and the aqueous solution of lithium bromide becomes thin. The dilute solution is sent to the high temperature regenerator 9 and the rest to the low temperature regenerator 10 through the solution heat exchanger 8 by the solution pump 7 and the dilute solution pipe 14.

In the high temperature regenerator 9, a direct heat source 1 such as a burner is used.
It is heated by 1 and separated into a vapor and a concentrated solution. Also,
The dilute solution in the low temperature regenerator 10 is heated by the steam generated in the high temperature regenerator 9 and supplied through the steam pipe 15 to be separated into steam and concentrated solution. The concentrated solution thus concentrated is sprayed again into the absorber 5 through the solution heat exchanger 8 and the concentrated solution pipe 16. The drain heated and condensed in the low temperature regenerator 10 is guided to the condenser 12. Further, the refrigerant vapor generated in the low temperature regenerator 10 is condensed in the condenser 12. The condensed refrigerant thus produced is guided to the evaporator 1 by the refrigerant pipe 19 and sprayed to complete the cycle.

[Embodiment 1] Next, an embodiment of the first invention will be described with reference to FIG. In FIG. 1, the same reference numerals as those in FIG. 3 denote the same parts as those of the above-described general absorption refrigerator, and therefore the description thereof will be omitted. The embodiment of FIG. 1 is different from the prior art in that a plurality of paths in the absorber through which cooling water flows are branched in the middle of the paths to pass water to the remaining path of the absorber and the condenser. That is, it is provided in parallel with the flow path.

In FIG. 1, 6 is an absorber heat transfer tube which constitutes a plurality of paths through which cooling water flows, and 6a is a water transfer tube branched in the middle of the path of the absorber heat transfer tube 6. 6a is guided to the condenser 12. Reference numeral 6b is a water passage pipe that constitutes a residual path branched in the middle of the path of the absorber heat transfer pipe 6, and the water passage pipe 6b is arranged in parallel with the water passage pipe 6a. 17 is a high temperature regenerator 9 and a low temperature regenerator 1
It is a spray that relates to a means for spraying the concentrated solution that is refluxed from 0 to the absorber 5 through the concentrated solution pipe 16.

The operation of the absorber heat transfer pipes 6 and the water pipes 6a, 6b in the absorption refrigerator of this embodiment having the above-mentioned structure will be described. The cooling water in the absorber heat transfer tube 6 that has entered the absorber 5 having a plurality of paths is sprayed 17
When the heat exchange of the other side is completed by spraying the concentrated solution of No. 1, it is branched into two, one of which is passed through the water pipe 6a and the condenser 12
Then, the rest is passed through the water pipe 6b which is the remaining path of the absorber 5. Since the amount of heat exchange in the condenser 12 is one half or less of that of the absorber 5, even if there is not all the amount of cooling water passing through the absorber 5, if the amount of cooling water is appropriate, the heat exchange in the condenser 12 is sufficient. I am satisfied.

On the other hand, the cooling water passed through the water pipe 6b is
Heat exchange is performed with the concentrated solution sprayed on the water pipe 6 b by the spray 17, that is, the high-temperature concentrated solution refluxed to the absorber 5. Since the concentrated solution has a high temperature and the sensible heat is about one tenth of the total heat exchange amount of the absorber 5, the solution is sufficiently supercooled even with a relatively small amount of branched cooling water, and Cooling water flows out with very low quality (high temperature). And
Since the high-quality (low temperature) cooling water is supplied to the condenser 12 or the like by that amount, the heat exchange efficiency of the absorber 5 and the condenser 12 is improved.

[Embodiment 2] Next, an embodiment of the second invention will be described with reference to FIG. In FIG. 2, the same reference numerals as those in FIG. 1 are the same parts as those in the previous embodiment, and the description thereof will be omitted. The embodiment shown in FIG. 2 is different from the embodiment shown in FIG. 1 in the shell configuration of the absorber and the condenser. In FIG. 2, 5A is an absorber, 12A is a condenser, 20 is a shell related to the same heat exchanger shell housing the evaporator 1, the absorber 5A, and the condenser 12A, and 21 is the absorber 5A and the condenser. It is a water chamber case of cooling water integrated in 12A.

In the embodiment shown in FIG. 2, the cooling water in the absorber heat transfer tube 6 that has entered the absorber 5A having a plurality of paths is
After the end of heat exchange by spraying the concentrated solution of the spray 17, the water is branched in the integrated water chamber case 21, one of which is passed through the water pipe 6a to the condenser 12A and the other is the remaining path of the absorber 5A. Water is passed through the water pipe 6b. According to the embodiment shown in FIG. 2, the same operation as that of the embodiment shown in FIG.
In addition to the effect, the shell structure is simplified, so that there is an effect peculiar to the present embodiment that the device is compact.

[0019]

As described in detail above, according to the present invention, the heat exchange between the absorber and the condenser is performed without using a complicated path structure and without increasing the pressure loss due to the increase in the number of paths. An absorption refrigerator that can improve efficiency can be provided.

[Brief description of drawings]

FIG. 1 is a system diagram of an absorption refrigerator according to an embodiment of the present invention.

FIG. 2 is a system diagram of an absorption refrigerator according to another embodiment of the present invention.

FIG. 3 is a system diagram illustrating a cooling cycle of a general absorption refrigerator.

[Explanation of symbols]

 1 Evaporator 3 Refrigerant Pump 5, 5A Absorber 6 Absorber Heat Transfer Tube 6a, 6b Water Passing Tube 7 Solution Pump 8 Solution Heat Exchanger 9 High Temperature Regenerator 10 Low Temperature Regenerator 12, 12A Condenser 17 Spray 20 Shell 21 Water Chamber Case −

Claims (3)

[Claims] 1. An evaporator, an absorber having a plurality of paths,
High temperature regenerator, low temperature regenerator, solution heat exchanger, solution pump,
An absorption chiller comprising a refrigerant pump and a piping system operatively connecting these, wherein the absorption chiller is provided with a flow path for passing cooling water in parallel to an absorber and a condenser. 2. A plurality of paths through which cooling water flows in the absorber are branched in the middle of the paths, and a remaining path of the absorber and a flow path for passing water to the condenser are arranged in parallel. 2. The absorption refrigerating machine according to claim 1, wherein the absorber remaining path after branching is provided with a means for spraying a concentrated solution refluxed from the regenerator to the absorber. 3. An evaporator, an absorber having a plurality of paths,
High temperature regenerator, low temperature regenerator, solution heat exchanger, solution pump,
Refrigerant pump, in an absorption refrigerator comprising a piping system for operatively coupling them, the absorber and the condenser are housed adjacent to each other in the same heat exchanger body, and the absorber and the condenser In addition to integrating the water chamber case of, the multiple paths through which cooling water flows in the absorber are
A branch is made in the middle of the path, a residual path of the absorber and a flow path for water flow to the condenser are arranged in parallel, and the residual path of the absorber after branching is returned from the regenerator to the absorber. An absorption refrigerator having a means for spraying the concentrated solution.