KR20100112832A - Low temperature water absorbtion type refrigerator having two-stage - Google Patents

Abstract

PURPOSE: A two-stage low-temperature water absorption type refrigerator is provided to enable the solution to flow in the free fall manner by the gravity since a first regenerator and an auxiliary regenerator are located on the top end. CONSTITUTION: A two-stage low-temperature water absorption type refrigerator(50) comprises a first regenerator(66), a second regenerator(82), an auxiliary regenerator(64), an evaporator(72), an absorber(74), an auxiliary absorber(84), a high-temperature heat exchanger(92), a low-temperature heat exchanger(90), an auxiliary heat exchanger(94), a cold water line, a cooling water line, a hot water line, a liquid line, an auxiliary liquid line, a first shell(60), a second shell(70) and a third shell(80). The auxiliary regenerator and the first regenerator are located around a condenser in both sides of the first shell and are divided by each eliminator. The evaporator, the absorber and the eliminator are arranged in the second shell. The second regenerator and the auxiliary absorber are arranged in the third shell. The third shell is located next to the second shell and the first shell is locates over the second shell and the third shell to make circulation.

Description

2-stage low temperature water absorption freezer {LOW TEMPERATURE WATER ABSORBTION TYPE REFRIGERATOR HAVING TWO-STAGE}

The present invention relates to a two-stage low temperature water absorption type refrigerator, and more specifically, the first regenerator and the auxiliary regenerator are located at the top so that the equipment can be simplified by adopting a method of circulating without the absorption liquid pump in the manner of using the respective absorption liquid pumps. And a two stage low temperature water absorption refrigerator.

In general, an absorption type refrigerator is a device that cools water flowing through a pipe by using vaporization heat generated when a refrigerant evaporates, and condenses and reuses the evaporated refrigerant.

The absorption chiller was developed in two stages to improve cooling and condensation efficiency. For example, the two stage cold water absorption chiller has two cycles, and stops one cycle when the cooling load is lowered to 80% or less. Energy efficiency (COP) by 25% can be improved. Most of the cooling season, except for the cold weather, is operated with a cooling load of 80% or less.

Low temperature water two stage absorption chiller is a pollution-free product that uses water as a refrigerant, and it is a product that can prevent electric power concentration in summer by using heat energy as a driving source. In addition, it is very safe because it is operated in a vacuum state, and it can be operated unattended because it can be operated automatically with the product combined with heat exchanger.

Referring to FIG. 1, which is a schematic diagram of a two-stage low temperature water absorption refrigerator according to the related art, the conventional low temperature water absorption refrigerator 10 has a first shell 10, a second shell 20, and a third shell ( 30).

In the first shell 10, the first regenerator 11, the auxiliary regenerator 12, and the condenser 13 are sequentially installed from the bottom, and the eliminator 14 is installed on the side of the condenser 13. Here, the first shell 10 is provided with a first pedestal 15 having a downward slope so that the absorbing liquid and the refrigerant dropped from the auxiliary regenerator 12 and the condenser 13 are collected and discharged to one side, and the first regenerator is provided. The lower end is formed in a hemispherical shape so that the absorbent liquid dropped in (11) gathers in the center and is easily discharged.

The solution of the auxiliary regenerator 12 is pumped by the first absorption liquid pump 16 and dropped into the auxiliary absorber 32, and the solution dropped into the auxiliary absorber 32 is again supplied by the second absorption liquid pump 35 by the auxiliary regenerator. It is dripped by (12).

In addition, the solution dropped in the first regenerator 11 is pumped by the third absorption liquid pump 17 and dropped in the second regenerator 31, and the solution dropped in the second regenerator 31 is again the fourth absorption liquid pump. Pumped by 36 to drop into absorber 22.

The second shell 20 is located on the side of the first shell 10, the evaporator 21 and the absorber 22 are respectively installed on both sides of the eliminator 23 is installed in the center. In addition, the second shell 20 is provided with a second support 24 having a downward inclined surface so that the refrigerant dripping from the evaporator is collected and discharged to one side, and the lower end of the second shell 20 collects and discharges the dripping liquid from the absorber 22 toward the center. It is formed in a hemispherical shape.

In addition, the solution dropped in the absorber 22 is pumped by the fifth absorption liquid pump 25 and dropped into the first regenerator 11. In addition, the refrigerant condensed in the evaporator 21 is pumped by the refrigerant pump 26 and circulated to the evaporator 21 together with the refrigerant condensed in the condenser 13.

In the third shell 30, the second regenerator 31 is installed on the left side, and the auxiliary absorber 32 is installed on the right side, and the absorbent liquid dropped from the second regenerator 31 and the auxiliary absorber 32 is respectively dropped on the bottom surface. The lower inclined surface 33 is formed in two stages so as to be easily collected at the center, and the lower end of the second regenerator is installed at a position higher than the lower end of the auxiliary absorber, and the eliminator is disposed between the second regenerator 31 and the auxiliary absorber 32. Data 34 is installed. The third shell 30 has a second shell 20 is installed on the upper portion, the auxiliary absorber 32 is positioned on the upper end of the absorber 22 of the second shell 20 to simplify the cooling water line.

Meanwhile, the low temperature heat exchanger 40, the high temperature heat exchanger 42, and the auxiliary heat exchanger 44 are connected to the respective devices through the absorbent liquid line.

However, such a conventional two-stage low temperature water absorption refrigerator has a plurality of circulators for circulating the solution because the secondary absorber 32 is positioned on the upper part of the absorber 22 and the condenser 13 is located on the upper part of the auxiliary regenerator 12. Absorber pumps 16, 17, 25, 35, 36 are required. As described above, due to the installation of a plurality of absorbing liquid pumps 16, 17, 25, 35, and 36, the structure of the equipment is complicated, and manufacturing costs are increasing. In addition, the conventional two-stage low temperature water absorption type refrigerator has a problem that a pressure loss occurs in the circulation cycle because the heat exchanger is formed in a plate shape, and there is a demand for technology development to reduce pressure loss.

An object of the present invention is to solve the above-mentioned problems of the prior art, the first regenerator and the auxiliary regenerator is located at the top so that the solution can be circulated without the absorption liquid pump, improve the structure of the regenerator to improve the overall appearance size It is to provide a two-stage low-temperature water absorption refrigerator that can be made small.

Two stage low temperature water absorption refrigerator according to the present invention for achieving the above object is a first stage regenerator, second regenerator, auxiliary regenerator, evaporator, absorber Two-stage cold water absorption chiller with piping equipment consisting of auxiliary absorber, high temperature heat exchanger, low temperature heat exchanger, auxiliary heat exchanger and cold water line connecting them, cooling water line, driving hot water line, solution line and auxiliary solution line The first regenerator and the first regenerator are disposed on both sides of the condenser and are partitioned by respective eliminators, and an eliminator is located between the evaporator and the absorber, and between them. And a second shell, and a third shell in which the second regenerator and the auxiliary absorber are located, wherein the third shell is located on the side of the second shell, The first shell is positioned on top of the second shell and the third shell is installed such that rotation takes place.

Here, the cold water line is connected so that cold water passes through the evaporator, the cooling water line is in communication with the absorber, the auxiliary absorber, and the condenser sequentially, the drive hot water line is the first regenerator and the first Two regenerators and the auxiliary regenerators are sequentially communicated with each other, and the solution line pumps a solution passing through the absorber to circulate back to the absorber via the first and second regenerators, and the auxiliary solution line is connected to the auxiliary regenerator. It may be a piping facility for pumping the solution passing through the absorber to circulate back to the auxiliary absorber through the auxiliary regenerator. In addition, it is preferable that the first regenerator, the second regenerator, or the auxiliary regenerator have a full liquid structure. In addition, the high temperature heat exchanger or the auxiliary heat exchanger may be made of a shell & tube type heat exchanger. The low temperature heat exchanger may be a plate heat exchanger.

The two-stage low-temperature water absorption type refrigerator according to the present invention configured as described above may allow the solution to flow in a natural drop method by gravity by placing the first regenerator and the auxiliary regenerator at the top thereof, and accordingly, to a separate absorption liquid pump. The natural circulation can be achieved without depending, and the configuration of the equipment can be simplified, thereby reducing the cost of manufacturing the equipment.

In addition, the present invention is made up of regenerators in a full-liquid structure can reduce the overall size of the appearance, occupy a small installation area, can be more easy to maintain and manage, and the length of the plumbing equipment connecting each pipe is reduced The loss of fluid passing through can be reduced, thereby reducing the load due to the operation of the pump. In addition, high temperature heat exchangers or auxiliary heat exchangers can be switched from plate to shell and tube type heat exchangers to reduce pressure losses in the equipment cycle.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a two-stage low temperature water absorption refrigerator according to the present invention.

The two-stage cold water absorption chiller 50 according to the present invention, as shown in FIG. 2, bundles the equipments operated at the same pressure, or combines the equipments with similar working processes into the respective shells, and each cell includes: It is connected by plumbing equipment.

For example, the second shell 70 and the third shell are installed adjacent to each other, and the first shell 60 is installed on the second shell 70 and the third shell 80.

The first shell 60 is provided with a condenser 62 in the center. The auxiliary regenerator 64 is installed at either the left or the right side of the condenser 62, and the first regenerator 66 is located at the other. An eliminator is provided between the condenser 62, the auxiliary regenerator 64, and the first regenerator 66 to partition the interior.

As an example, in an embodiment of the present invention the auxiliary regenerator 64 is located on the right side of the condenser 62, and the first regenerator 66 is located on the left side of the condenser 62. In addition, the solution of the first shell 60 is heated by the first regenerator 66, and in this process, the water contained in the solution evaporates and the solution is thickened. Then, the evaporated water is supplied to the condenser 62 side through the eliminator.

The lower portion of the condenser 62 is formed with a first support portion 63 having an inclined surface so that the condensed refrigerant can be collected to the lower portion. The refrigerant condensed and discharged from the condenser 62 of the first shell 60 is supplied to the second shell 70.

The second shell 70 is provided with an evaporator 72 on the cold water line side, and an absorber 74 is provided on the side of the evaporator 72. In one example, the absorber 74 may be installed on the left side of the evaporator 72. An eliminator 76 is installed between the evaporator 72 and the absorber 74.

The second shell 70 is formed with a second support portion 73 having a downward inclined surface so that the refrigerant dripping from the evaporator 72 can be collected and discharged to one side. In addition, the second support part 73 is provided with a refrigerant pump 78 for spraying the dropped refrigerant back upwards.

In addition, a cold water inlet is provided at a lower portion of the evaporator 72, and a cold water outlet is formed at an upper portion of the evaporator 72 to exchange heat with cold water introduced into the lower portion and to discharge the same. Preferably, the cold water is introduced into the evaporator 72 and then radiated from the evaporator 72 and discharged into the cold water of low temperature.

On the other hand, the absorber 74 is a cooling water is introduced from the bottom, the cooling water is heat exchanged in the absorber 74 to absorb the heat of the solution is discharged.

In addition, as the absorber 74, the solution falls into the liquid state from the solution tray installed at the upper side, and this solution releases heat to the absorber 74 and at the same time absorbs moisture and dilutes and collects downward. In addition, the solution collected in the lower portion is supplied to the first regenerator 66 of the first shell 60 through the first absorbing liquid pump 79.

At this time, on the pipe line connected to the first absorber pump 79 and the first regenerator 66 side of the first shell 60, the low temperature heat exchanger 90 that exchanges heat with the solution supplied to the second shell 70 and The high temperature heat exchanger 92 is installed to exchange heat with the first regenerator 66 side. Therefore, the solution discharged from the first absorption liquid pump 79 is heat-exchanged through the low temperature heat exchanger 90 and the high temperature heat exchanger 92, and then supplied to the first regenerator 66.

In addition, the solution supplied to the first shell 60 is heat-exchanged with the first regenerator 66, and then is supplied to the high temperature heat exchanger 92. The solution supplied to the high temperature heat exchanger 92 is supplied to the second regenerator 82 side of the third shell 80.

Then, the solution heat exchanged with the second regenerator 82 of the third shell 80 is supplied back to the absorber 74 through the second absorbent liquid pump 86 to form a cyclic cycle of dropping again by the solution tray. At this time, the solution supplied from the second absorption liquid pump 86 passes through the low temperature heat exchanger 90, and in this process, the solution discharged from the first absorption liquid pump 79 is exchanged with the low temperature.

Meanwhile, the cooling water discharged after absorbing heat from the absorber 74 of the second shell 70 flows into the auxiliary absorber 84 of the third shell 80. The cooling water supplied to the auxiliary absorber 84 of the third shell 80 is heat-exchanged with the solution passing through the auxiliary absorber 84 to absorb heat and is discharged. The coolant supplied to the condenser 62 of the first shell 60 absorbs heat in the process of being discharged through the condenser 62 of the first shell 60.

The first regenerator 66 of the first shell 60 is connected to the pipe in which the driving hot water flows. The high temperature driving hot water is supplied to the first regenerator 66 and is discharged to the second regenerator 82 of the third shell 80 after the temperature is lowered by heat exchange. In addition, the driving hot water supplied to the second regenerator 82 of the third shell 80 is heat-exchanged with the solution supplied from the second shell 70, and then heats up, and then the auxiliary regenerator 64 of the first shell 60. Is supplied. Next, the driving hot water introduced into the auxiliary regenerator 64 by the first shell 60 is discharged after the heat is exchanged with the solution.

Meanwhile, a third base 85 having an inclined surface downward is formed under the auxiliary absorber 84 of the third shell 80. The solution collected on the third support 85 is supplied to the auxiliary regenerator 64 side of the first shell 60 through the auxiliary absorption liquid pump 87. At this time, the auxiliary heat exchanger 94 is installed on the pipe connected to the auxiliary absorbing liquid pump 87 and the auxiliary regenerator 64 side of the first shell 60, and the auxiliary regenerator 64 of the first shell 60 and After the heat-exchanged solution flows back into the auxiliary heat exchanger (94) and is heat-exchanged, it forms a cycle circulating from the solution tray provided on the upper side of the auxiliary absorber (84) of the third shell to the auxiliary absorber (84).

Looking at the circulation process through the piping equipment installed in the two-stage cold water absorption chiller 50 configured as described above are as follows.

First, the cold water line consists of piping equipment passing through the evaporator 72 of the second shell (70). Here, the cold water supplied to the cold water line is cooled and discharged while passing through the evaporator 72.

Also, the cooling water line is configured to sequentially communicate the absorber 74 of the second shell 70, the auxiliary absorber 84 of the third shell 80, and the condenser 62 of the first shell 60. Facility. The cooling water supplied to the cooling water line is supplied to the absorber 74 of the second shell 70, and absorbs and discharges the heat of the solution sprayed toward the absorber 74. The coolant discharged in this way is supplied to the auxiliary absorber 84 of the third shell 80, and then absorbs and discharges the heat of the solution sprayed to the auxiliary absorber 84. In addition, the cooling water discharged from the auxiliary absorber 84 is supplied to the condenser 62 of the first shell 60, and in this process, the condensation heat is absorbed and discharged.

Meanwhile, the driving hot water line is configured to sequentially communicate the first regenerator 66, the second regenerator 82, and the auxiliary regenerator 64. The driving hot water supplied to the driving hot water line is supplied to the first regenerator 66 of the first shell 60. Then, the driving hot water is exchanged with the solution supplied through the solution line in the first regenerator 66 and cooled, and then supplied to the second regenerator 82 of the second shell 70. Then, the driving hot water supplied to the second regenerator 82 is cooled by heat exchange with the solution supplied in connection with the solution line, and is then supplied to the auxiliary regenerator 64 of the first shell 60. The hot water supplied to the auxiliary regenerator 64 is discharged after heat exchange with the solution supplied from the auxiliary solution line.

The solution line pumps the solution passing through the absorber 74, passes through the first regenerator 66 and the second regenerator 82, and then cycles back to the absorber 74. The solution dropped to the absorber 74 side of the second shell 70 collects downward, and is then pumped by the first absorbent liquid pump 79 to exchange heat through the low temperature heat exchanger 90 and the high temperature heat exchanger 92. The solution is heat-exchanged with the first regenerator 66 of the first shell 60, and then supplied to the high temperature heat exchanger 92 and the second regenerator 82 of the third shell 80 to be heat-exchanged. Then, after the solution heat exchanged with the second regenerator 82 of the third shell 80 is discharged to the lower portion, and passed through the low temperature heat exchanger 90 by the second absorption liquid pump 86, the second shell ( 70) falls into the absorber 74 side to form a discharge cycle.

In addition, the auxiliary solution line circulates to the auxiliary absorber 84 of the third shell 80, the auxiliary regenerator 64 of the first shell 60, and again to the auxiliary absorber 84 of the third shell 80. Plumbing equipment. The solution supplied to the auxiliary absorber 84 is pumped by the auxiliary absorbent liquid pump 87 to pass through the auxiliary heat exchanger 94, and then heat exchanges with the auxiliary regenerator 64 of the first shell 60. Then, the solution heat exchanged with the auxiliary regenerator 64 is supplied to the auxiliary heat exchanger 94 to form a cycle after the heat exchange, and then circulated to the auxiliary absorber 84 side again.

As described above, the present invention allows the first regenerator 66 and the auxiliary regenerator 64 to be positioned at the top thereof so that the solution can be circulated without the absorption liquid pump, thereby simplifying the configuration of the equipment.

In addition, in the present invention, the regenerators 64, 66, 82 can be reduced to the overall size by changing the regenerator used in the tray (Shell & Tube) tray method of the full liquid structure. . Through this structure change, it is possible to position the first shell 60 including the first regenerator 66 and the condenser 62 on the second shell 70 and the third shell 80. In addition, it is possible to reduce the pressure loss in the equipment cycle by changing the high temperature heat exchanger 92 or the auxiliary heat exchanger 94 from the plate type to the shell & tube type heat exchanger. In addition, the low temperature heat exchanger 90 may be used as a plate heat exchanger.

In addition, the solution used in the present invention may be used lithium bromide (LiBr) aqueous solution, but is not limited to this, it is also possible to use other absorption solutions.

As described above with reference to the drawings illustrated a two-stage low temperature water absorption chiller according to the present invention as described above, the present invention is not limited by the embodiments and drawings described above, the present invention within the claims Of course, various modifications and variations can be made by those skilled in the art.

1 is a block diagram of a two-stage low temperature water absorption refrigerator according to the prior art

2 is a block diagram of a two-stage low temperature water absorption refrigerator according to the present invention

<Explanation of symbols for the main parts of the drawings>

50: two stage low temperature water absorption refrigerator 60: first shell

62: condenser 64: auxiliary regenerator

66: first player 70: second shell

72: evaporator 74: absorber

76: eliminator 78: refrigerant pump

79: first absorption liquid pump 80: third shell

82: second regenerator 84: auxiliary absorber

86: second absorption liquid pump 87: auxiliary absorption liquid pump

90: low temperature heat exchanger 92: high temperature heat exchanger

94: auxiliary heat exchanger

Claims (5)

First regenerator, second regenerator, auxiliary regenerator, evaporator, absorber, auxiliary absorber, high temperature heat exchanger, low temperature heat exchanger, auxiliary heat exchanger and cold water line connecting them, cooling water line, driving hot water line, solution line, auxiliary A two-stage cold water absorption chiller having a piping system consisting of a solution line, A first shell in which the auxiliary regenerator and the first regenerator are disposed on both sides of the condenser and partitioned by respective eliminators; A second shell having an eliminator positioned between the evaporator and the absorber, and And a third shell in which the second regenerator and the auxiliary absorber are located, The third shell is located on the side of the second shell, the first shell is a two-stage cold water absorption chiller characterized in that installed on the second shell and the top of the third shell to be circulated. The method according to claim 1, The cold water line is connected to allow cold water to pass through the evaporator, The cooling water line sequentially communicates with the absorber, the auxiliary absorber, and the condenser; The driving hot water line sequentially communicates the first regenerator, the second regenerator, and the auxiliary regenerator, The solution line pumps the solution passing through the absorber to circulate back to the absorber via the second regenerator, The auxiliary solution line is a two-stage cold water absorption chiller, characterized in that the piping facility for pumping the solution passing through the auxiliary absorber and circulating back to the auxiliary absorber through the auxiliary regenerator. The method according to claim 1 or 2 The first regenerator, the second regenerator or the auxiliary regenerator is a two-stage low-temperature water absorption type refrigerator characterized in that the liquid-type structure. The method according to claim 1 or 2 The high temperature heat exchanger or the auxiliary heat exchanger is a two-stage cold water absorption chiller, characterized in that consisting of a shell & tube type heat exchanger. The method according to claim 1 or 2 The low temperature heat exchanger is a two-stage low temperature water absorption chiller, characterized in that consisting of a plate heat exchanger.

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