KR20000031385A - Absorptive freezer - Google Patents

Abstract

PURPOSE: An absorptive freezer is provided to improve the efficiency of a solution heat exchanger by forming multiple tubes in a solution heat exchanger to flow weak solution and concentrated solution and by changing the flow. CONSTITUTION: A weak solution vented from a solution pump(70) flows into a heat exchange space(214) of low temperature via a first pipe(232) formed on the lower part of a first plate(230) and via a weak solution intake hole(220) formed on the outer side of a second housing(210). The weak solution flowed into the heat exchange space of low temperature is sent to a low temperature regenerator(40) via an exchange space(216) of high temperature heat and a weak solution discharge hole(220a) via a second bypass pipe(238). And the concentrated solution in the low temperature regenerator flows into the heat exchange space of high temperature via a second pipe(234) of a first plate(230) and a concentrated solution intake hole(218) and then into the heat exchange space of low temperature formed on the lower part by passing through a first bypass pipe(236) formed on the end. The concentrated solution is sprayed to an absorber(10) by passing through a concentrated solution discharge hole(218a) and mixed with the small part of the weak solution. Thereby, the sufficient heat exchange of the concentrated solution and the weak solution is performed.

Description

Absorption Chiller

The present invention relates to an absorption type refrigerator, in particular, by dividing the inside of the solution heat exchanger for supplying the heavy solution sprayed into the absorber into a plurality of tubes to flow the rare solution and the concentrated liquid, thereby improving the efficiency of the solution heat exchanger It is directed to an absorption chiller.

In general, the air conditioner is to maintain the optimum temperature and humidity according to all weather conditions and indoor environments, and a humidifier to maintain proper humidity, including air conditioning and heating to cool or warm the room air. Ventilation equipment for discharging indoor air to the outside is included.

Such an air conditioner may be classified into various types according to a refrigerant to be used, and in particular, water is used as a refrigerant to absorb cold and hot water.

In the absorption type cold and hot water machine using water as a refrigerant, lithium bromide (LiBr) (absorption solution) is mainly used as an absorbent, and water and lithium bromide solution are heated using steam or hot water.

With reference to the accompanying Figure 1 to help the understanding of the present invention will be briefly described a general absorption chiller.

1 is a schematic diagram showing the flow of a general absorption chiller.

As a general configuration of the absorption chiller, the rare solution conveyed by the suction force of the solution pump 70 is heated by the concentrated solution introduced from the low temperature regenerator 40, and the concentrated solution heated by the rare solution is discharged from the solution pump 70. It is provided with a solution heat exchanger (50) and an evaporator (20) to be sprayed into the absorber (10) through a nozzle in a diluted state with a small amount of the dilute solution discharged.

Here, the absorber 10 is to absorb the latent heat of condensation and dilution generated by the evaporated vapor is absorbed by the absorbing solution.

The evaporator 20 is configured to discharge the first tube 80 through which cold water flows, and a refrigerant accumulated in the drain 62 of the lower portion to the upper portion of the evaporator 20.

The second tube 90 through which the coolant in the absorber 10 flows is connected to the condenser 30, and the third tube 110 through which the hot water or steam provided in the low temperature regenerator 40 flows. It is connected to the bypass pipe 100.

In addition, the solution heat exchanger 50 integrally forms the first and second solutions, the inlets and outlets 54a and 54b and the first and the second concentrates, and the outlets 52a and 52b on both sides of the first housing 52. Then, the heat exchange pipe 54 is provided between the first and second solution inflow and discharge ports 54a and 54b.

Absorption type refrigerator having such a configuration is applied to the power supply is not described and the refrigerant pump 60 and the solution pump 70 is driven, the rated operation is performed after the start operation time of about 20 to 30 minutes.

That is, water, which is a refrigerant, is sprayed to the evaporator 20 through a nozzle, and cold water flows into the first tube 80 inside the evaporator 20, so that the refrigerant is at a saturation temperature corresponding to the pressure. Boil takes the heat from the cold water and evaporates it, so the cold water is cooled and supplied to the place where it is needed for cooling.

At this time, the vapor evaporated in the absorber 10 is absorbed by the absorbent solution which is an absorbent, and the latent heat of condensation is generated in the process of being absorbed. Then, the absorbing solution absorbs the moisture, the concentration is lowered, and dilution heat is generated. This dilution heat is removed by the second tube 90 installed in the absorber 10 through which the coolant flows.

On the other hand, the absorbing solution that absorbs water and dilutes is passed through the heat exchange pipe 54 in the solution heat exchanger 50 by the solution pump 70 installed in the absorber 10, the temperature is increased, In this state, it is supplied to the low temperature regenerator 40.

The absorbent solution supplied to the low temperature regenerator 40 is converted into a concentrated solution and then heat exchanged with the rare solution while moving through the second concentrate outlet 52b through the first concentrate inlet 52a of the solution heat exchanger 50. The diluted solution and the diluted heavy solution are sprayed into the absorber 10.

On the other hand, the refrigerant vapor evaporated in the low temperature regenerator 40 is supplied to the condenser 30, cooled and condensed by the cooling water absorbed dilution heat in the absorber 10 is supplied to the evaporator 20 in a liquefied state. The low temperature regenerator 40 controls the solution pump 70 according to the solution level by a controller (not shown) to adjust the absorbing solution.

The rare solution from the absorber flows into the heat exchange pipe in the solution heat exchanger by the solution pump, and the concentrated solution from the low temperature regenerator flows into the heat exchanger. There is a problem that the manufacturing cost is increased due to the loss.

In addition, when the solution heat exchanger is reduced in order to reduce the manufacturing cost, there is a problem in that the operating cost is high due to the increased consumption of the heating source in the regenerator.

Accordingly, the present invention has been made to solve the above problems, and divided into a plurality of tubes to flow the rare solution and the concentrate in the solution heat exchanger, the absorption type to change the flow to improve the efficiency of the solution heat exchanger The purpose is to provide a freezer.

1 is a schematic view showing the flow of a typical absorption chiller,

Figure 2 is a cross-sectional view showing the inside of the heat exchanger of the absorption chiller according to the present invention.

* Description of the symbols for the main parts of the drawings *

210; second housing 212; partition plate

216; high temperature heat exchange space 214; low temperature heat exchange space

218,218a; concentrate inlet, outlet 220,220a; solution inlet, outlet

230; first plate 232,234; first and second pipes

236,238; 1, 2 bypass pipe

The present invention for achieving this has a first inlet connected to the solution pump and the first outlet connected to the low temperature ashing machine, and integrally formed with the second inlet connected to the low temperature regenerator and the second outlet for supplying the heavy solution to the absorber. One housing; A solution heat exchanger comprising a pipe connected to a first inlet and a first outlet, the solution heat exchanger comprising: a housing having a rare solution inlet, an outlet, and a concentrate inlet and an outlet; A partition plate provided in the housing to be separated into a high temperature heat exchange space and a low temperature heat exchange space; A first plate having first and second pipes on one side of the partition plate; It is achieved to provide an absorption chiller comprising a second plate having first and second bypass pipes at the other end of the partition plate to face the first plate.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view showing the inside of the heat exchanger of the absorption chiller according to the present invention.

Prior to the description of this embodiment, in connection with the prior art, the absorption chiller is heated to the concentrated solution flowing from the low temperature regenerator 40 by the suction of the solution pump 70, the concentrated solution heated the rare solution A solution heat exchanger (50) and an evaporator (20), which are sprayed into the absorber (10) through a nozzle in a diluted state with a small amount of rare solution discharged from the solution pump (70), are provided.

Here, the solution heat exchanger 50 integrally integrates the first and second solutions, the inlets and outlets 54a and 54b and the first and the second concentrates, and the outlets 52a and 52b on both sides of the first housing 52. And a heat exchange pipe 54 is provided between the first and second rare liquid inlets and outlets 54a and 54b.

In the absorption chiller having such a configuration, the absorbing solution that absorbs and dilutes water passes through the heat exchange pipe 54 in the solution heat exchanger 50 by a solution pump 70 installed below the absorber 10, The temperature rises and is supplied to the low temperature regenerator 40 in this state. The absorbent solution supplied to the low temperature regenerator 40 is converted into a concentrated absorbent solution and then moved through the second concentrate discharge port 52b through the first concentrate inlet port 52a of the solution heat exchanger 50, and the rare solution and heat. The exchange takes place and the diluted solution and the diluted heavy solution are sprayed into the absorber 10.

As described above, in order to prevent the efficiency of the heat exchange from being caused by the concentrated solution introduced from the low temperature regenerator to the rare solution flowing in the heat exchange pipe 54 of the solution heat exchanger 50, the solution heat exchanger ( The partition plate 200 is divided into a high temperature heat exchange space 216 and a low temperature heat exchange space 214 in the second housing 210, and first and second pipes 232 and 234 at one end of the partition plate 212. ) And a second plate 237 having first and second bypass pipes 236 and 238 so as to face the first plate 230.

Here, the outside of the second housing 210 is provided with a solution solution inlet and outlet 220, 220a for introducing and discharging the solution, and the solution solution inlet, outlet 218,218a for introducing and discharging the concentrate solution. ) Is provided. The first and second plates 230 are provided such that the first and second pipes 232 and 234 are vertically symmetrical so that the concentrate and the rare solution are introduced into the high temperature heat exchange space 216 and the low temperature heat exchange space 214 at upper and lower portions thereof. The first and second bypass pipes 236 and 238 are fixed to intersect the ends of the partition plate 212.

As described above, the rare solution discharged from the solution pump 70 includes a rare solution inlet 220 provided outside the second housing 210 and a first pipe provided below the first plate 230. It is introduced into the low temperature heat exchange space 214 through 232.

The rare solution introduced into the low temperature heat exchange space 214 is sent to the low temperature regenerator 40 through the high temperature heat exchange space 216 and the rare solution outlet 220a through the second bypass pipe 238.

The concentrated liquid of the low temperature regenerator 40 is introduced into the high temperature heat exchange space through the concentrated liquid inlet 218 and the second pipe 234 of the first plate 230, and then the first bypass pipe provided at the end thereof. It flows into the low temperature heat exchange space 214 formed in the lower part via the 236.

The concentrated liquid introduced into the low temperature heat exchange space 214 passes through the concentrated liquid outlet 218a and is sprayed into the absorber 10 in a diluted state with a small amount of the rare solution.

As a result, sufficient heat exchange is achieved between the concentrated solution supplied from the low temperature regenerator 40 and the rare solution supplied to the solution pump 70.

As described above, the present invention allows the concentrate solution flowing from the low temperature regenerator and the solution solution discharged from the solution pump to change the direction of the flow in the housing so that sufficient heat exchange is performed between the concentrate solution and the rare solution. There is an advantage to reduce the cost of the production.

Claims (1)

A housing having a first inlet connected to the solution pump and a first discharge port connected to the low temperature regenerator, and integrally formed with a second inlet connected to the low temperature regenerator and a second discharge port for supplying the heavy solution to the absorber; In the solution heat exchanger consisting of a pipe connected to the first inlet and the first outlet, A second housing 210 having a solution solution inlet and outlet 220 and 220a and a concentrate solution inlet and outlet 218 and 218a; A partition plate 212 provided in the second housing 210 to be separated into a high temperature heat exchange space 216 and a low temperature heat exchange space 214; A first plate 230 having first and second pipes 232 and 234 on one side of the partition plate 212; Absorption freezer, characterized in that consisting of a second plate (237) having first and second bypass pipes (236,238) at the other end of the partition plate (212) so as to face the first plate (230).