CN102287958A - Lithium bromide solution absorbing type refrigerating process of air-conditioner - Google Patents

Abstract

A refrigeration process of lithium bromide solution absorption type air conditioner, relates to a refrigeration process of air conditioner, including refrigeration equipment, refrigerant water heat exchanger, evaporator, coil condenser, one-way valve, generator, heater, its characteristics That is, the evaporator 2 is connected with the first generator 8 and the second generator 11 with a pipeline, and the pipeline is connected with the evaporator check valve 4, the check valve 5 that the evaporator is connected to the generator, and the second generator One-way valve 6, first generator one-way valve 7 and coil condenser 3, the liquid in evaporator 2 is provided with refrigerant water heat exchanger 1; the liquid in generator is provided with generator heater, and the refrigerant water exchange The heater 1 is connected with the air-conditioned space. The invention has a simple refrigeration cycle process, no rotating equipment, small volume, less equipment involved, and can use the waste heat of the engine to refrigerate.

Description

Refrigeration process of lithium bromide solution absorption air conditioner

technical field

The invention relates to a refrigeration process of an air conditioner, in particular to a refrigeration process of a lithium bromide solution absorption type air conditioner.

Background technique

At present, the known lithium bromide solution absorption refrigeration method uses water as a refrigerant and lithium bromide as an absorbent. Cooling is obtained by the evaporation of water. The lithium bromide absorption refrigeration device is mainly composed of generator, condenser, evaporator, absorber, heat exchanger, circulation pump and other parts. During the operation of the lithium bromide absorption refrigeration device, when the lithium bromide aqueous solution is heated in the generator, the water in the solution is continuously vaporized; with the continuous vaporization of the water, the concentration of the lithium bromide aqueous solution in the generator continues to increase and enters the absorber; Water vapor enters the condenser, is cooled by the cooling water in the condenser, and then condenses to become liquid water at high pressure and low temperature; when the water in the condenser enters the evaporator, it expands rapidly and vaporizes, and absorbs a large amount in the evaporator during the vaporization process. In this process, the low-temperature water vapor enters the absorber and is absorbed by the lithium bromide aqueous solution in the absorber. The concentration of the solution gradually decreases, and then is sent back to the generator by the circulating pump to complete a refrigeration cycle. cycle. This cycle goes on, and the cooling capacity is continuously produced. There can be one or two generators in the practical refrigeration cycle, which are double-effect lithium bromide absorption refrigeration cycle and single-effect lithium bromide absorption refrigeration cycle. The existing lithium bromide solution absorption refrigeration method has the following disadvantages, that is, more equipment is involved in the refrigeration cycle, and it is necessary to use rotating equipment such as pumps to transport the solution between containers. This not only increases the manufacturing cost of the system, but also increases the difficulty of miniaturization of the system, making it inconvenient to use on vehicles and ship air conditioning systems.

Invention content

The object of the present invention is to provide a refrigeration process of a lithium bromide solution absorption air conditioner. The refrigeration cycle process of the present invention is simple, without rotating equipment, small in size, less equipment involved, and can be refrigerated by waste heat of the engine.

The purpose of the present invention is achieved through the following technical solutions:

A lithium bromide solution absorption air-conditioning refrigeration process, including refrigeration equipment, refrigerant water heat exchanger, evaporator, coil condenser, one-way valve, generator, heater, the evaporator and the first generator and the second The two generators are connected by pipes, and the pipes are connected with the evaporator check valve, the check valve connecting the evaporator and the generator, the second generator check valve, the first generator check valve and the coil condenser A refrigerant water heat exchanger is arranged in the liquid of the evaporator; a generator heater is arranged in the liquid of the generator, and the refrigerant water heat exchanger is connected with the air-conditioning space.

The refrigerating process of the lithium bromide solution absorption air conditioner described above, the system composed of the evaporator, the generator, the pipeline and the one-way valve is vacuum-like.

The refrigerating process of the described lithium bromide solution absorption air conditioner, the first generator heater and the second generator heater alternately heat the lithium bromide solution in the first generator and the second generator to make it evaporate and concentrate .

In the refrigeration process of the lithium bromide solution absorption air conditioner, the water vapor enters the coil condenser through the pipeline, and after passing through the coil condenser, the condensed water close to the ambient temperature enters the evaporator.

In the refrigeration process of the lithium bromide solution absorption air conditioner, the water vapor partial pressure in the second generator is lower than the pressure in the evaporator.

Advantage and effect of the present invention are:

1. The present invention overcomes the large volume of refrigeration system of existing lithium bromide solution absorption refrigeration technology, involves the shortcoming of many equipments, provides a kind of refrigeration cycle simple, does not comprise the lithium bromide solution absorption refrigeration process of any moving equipment.

2. Due to the small size of the refrigeration system and the lack of any rotating equipment, it is very suitable for vehicles and ships where the installation space is limited and there is waste heat from the engine. It fully utilizes the inherent ability of lithium bromide solution absorption refrigeration to utilize low-grade heat sources advantage.

Description of drawings

Fig. 1 is a refrigeration process flow chart of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

In the figure: refrigerant water heat exchanger 1, evaporator 2, coil condenser 3, evaporator one-way valve 4, evaporator and generator one-way valve 5, second generator one-way valve 6, first Generator check valve 7, first generator 8, first generator heater 9, second generator heater 10, second generator 11.

The evaporator 2 is connected with the first generator 8 and the second generator 11 with a pipeline, and the pipeline is connected with the evaporator check valve 4, the evaporator check valve 5 connected with the generator, and the second generator check valve. Valve 6, first generator check valve 7 and coil condenser 3.

The above system composed of evaporator, generator, pipeline, one-way valve, etc. is vacuumized.

The evaporator 2 is filled with water occupying part of its volume, and the first generator 8 and the second generator 11 are filled with lithium bromide solution occupying part of its volume. The ratio, pressure, vacuum and other indicators of the partial volume of water or partial volume of lithium bromide solution can be selected with reference to the relevant refrigeration parameters of the existing absorption lithium bromide refrigeration medium.

There is a refrigerant water heat exchanger 1 in the liquid of the evaporator 2;

There is a first generator heater 9 in the liquid of the first generator 8;

The second generator heater 10 is present in the liquid of the second generator 11 .

The first generator heater 9 and the second generator heater 10 alternately heat the lithium bromide solution in the first generator 8 and the second generator 11 . After the liquid in the evaporator and generator is injected, the water in the evaporator 2 evaporates rapidly due to the presence of lithium bromide solution in the system. The lithium bromide solution in the generator becomes thinner due to the absorption of water vapor from the evaporator. In order to make the water in the evaporator 2 continuously evaporate, the lithium bromide solution in the first generator 8 and the second generator 11 is alternately heated by the first generator heater 9 and the second generator heater 10 to evaporate and concentrate. When the first generator heater 9 heats the lithium bromide solution in the first generator 8, the water vapor partial pressure in the first generator 8 rises, the first generator check valve 7 opens, and the water vapor enters the disk through the pipeline. Tube condenser 3, the condensed water close to ambient temperature enters evaporator 2 after passing through coil condenser 3; In this process, the lithium bromide solution in the second generator 11 has relatively high concentration, and the The water vapor partial pressure is lower than the pressure in the evaporator 2, the one-way valve 5 connected to the evaporator and the generator opens, the water in the evaporator 2 evaporates, and the water vapor enters through the one-way valve 5 and the pipeline connected to the evaporator and the generator The second generator 11 is also absorbed by the lithium bromide solution therein, while the concentration of the lithium bromide solution decreases to some extent. When the concentration of the lithium bromide solution drops to the water that cannot effectively evaporate the generator 2, the second generator heater 10 starts heating, and the first The generator heater 9 stops heating. When the second generator heater 10 heats the lithium bromide solution in the second generator 11, the water vapor partial pressure in the second generator 11 rises, the second generator check valve 6 opens, and the water vapor enters the disk through the pipeline. Tube condenser 3, the condensed water close to ambient temperature after passing through the coil condenser 3 enters the evaporator 2; in this process, the lithium bromide solution in the first generator 8 has a relatively high concentration, the The water vapor partial pressure is lower than the pressure in the evaporator 2, the evaporator check valve 4 is opened, the water in the evaporator 2 evaporates, and the water vapor enters the first generator 8 through the evaporator check valve 4 and the pipeline and is absorbed by the lithium bromide therein. Solution absorbs, and lithium bromide solution concentration reduces to some extent simultaneously, and when lithium bromide solution concentration drops to the water in evaporator 2 effectively, first generator heater 9 starts heating, and second generator heater 10 stops heating. This cycle continues, the water in the evaporator 2 is continuously evaporated, and the temperature of the water evaporates to drop, and the refrigerant water heat exchanger 1 sends the cooling capacity to the air-conditioned space.

Claims (5)

1. the refrigeration process of a lithium-bromide solution absorption type air-conditioner, include refrigeration plant, the chilled water heat exchanger, evaporimeter, coil condenser, check valve, generator, heater, it is characterized in that, connect with pipeline between evaporimeter (2) and first generator (8) and second generator (11), be connected with evaporimeter check valve (4) on the pipeline, the check valve that evaporimeter links to each other with generator (5), the second generator check valve (6), the first generator check valve (7) and coil condenser (3) are provided with chilled water heat exchanger (1) in the liquid of evaporimeter (2); Be provided with the generator heater in the liquid of generator, chilled water heat exchanger (1) links to each other with conditioned space.

2. the refrigeration process of a kind of lithium-bromide solution absorption type air-conditioner according to claim 1 is characterized in that, the system that described evaporimeter and generator and pipeline, check valve are formed is the vacuum shape.

3. the refrigeration process of a kind of lithium-bromide solution absorption type air-conditioner according to claim 1, it is characterized in that the lithium-bromide solution that the described first generator heater (9) and the second generator heater (10) alternately heat in first generator (8) and second generator (11) makes its evaporation and concentration.

4. the refrigeration process of a kind of lithium-bromide solution absorption type air-conditioner according to claim 1, it is characterized in that, described steam enters coil condenser (3) by pipeline, enters evaporimeter (2) by the condensed water near environment temperature behind the coil condenser (3).

5. the refrigeration process of a kind of lithium-bromide solution absorption type air-conditioner according to claim 1 is characterized in that, the steam partial pressure in described second generator (11) is lower than the pressure in the evaporimeter (2).