CN2909103Y - Solar double-effect absorption air conditioner - Google Patents

Abstract

The utility model relates to a solar energy air-conditioning device, in particular to a double-effect absorption air conditioning, which adopts the double-effect absorption refrigeration principle of producing high temperature heat source by using a solar energy concentrator with a working fluid of lithium bromide and water. At the same time of cooling and heating, the device can offer domestic hot water. The system structure consists mainly of the concentrator, a high pressure heat-collecting generator, a low pressure generator, a condenser, an evaporator, an absorber, a bath pump, a heat exchanger of domestic water and others. The heat source can heat the bath in the high pressure generator directly to produce a cryogen steam with high pressure and high temperature in the high pressure generator. The cryogen steam serving as the heat source of the low pressure generator once again can not only make effective use of the heat quantity of the cryogen steam but also reduce the heat exhaust quantity of the set. Heating up the domestic water during the processing of condensation makes an effect of multiple heat saving. With a high thermal coefficient, the simple system structure makes product forming and extending easy.

Description

Solar double-effect absorption air conditioner

Technical field

The utility model relates to an air conditioning system utilizing solar energy, in particular to a double-effect absorption type air conditioner.

Background technique

At present, there are energy crises in many countries and regions. How to use solar energy, a clean and renewable energy source, has attracted more and more attention. The development of solar air conditioners is of great significance to energy conservation and natural environment protection. However, there are few successful products on the market, and the existing problems are: the system structure is complex and the cost is high, such as the application number 01128404.8 (solar medium and high temperature heat collection absorption air conditioning system); there are also simple structures, but the thermal coefficient is only 0.7 Below, the large comprehensive efficiency of exhaust heat is at the bottom, as the patent No. is 00229377.3 (solar absorption type air conditioner) patent. These are not conducive to the formation of products, so that solar energy resources can not be used for a long time.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a solar double-effect absorption air-conditioning system that can be used in different environments in four seasons, can cool in summer, heat in winter, and provide domestic hot water throughout the year. . Due to the use of a concentrating heat collection device, the heat source directly heats the solution in the high-pressure generator, and high-pressure refrigerant vapor can be generated in the high-pressure generator, which is used as the heat source of the low-pressure generator again, and the heat energy when the condenser cools is reheated. The use of hot water not only effectively utilizes the heat of the refrigerant steam, but also reduces the exhaust heat of the unit to achieve multiple heat saving effects. According to the calculation and actual measurement, the heating capacity is about 1/2 to 2/3 of the single-effect unit, the heat load of the condenser is about 1/2, and the thermal coefficient reaches more than 1. The overall efficiency is high, the system is simple, and it is conducive to productization and promotion. .

The working principle of the utility model is the principle of double-effect absorption refrigeration using solar concentrating panels to generate high-temperature heat sources, and lithium bromide and water as working fluids. The system structure is mainly composed of concentrating plate, heat collecting high pressure generator, low pressure generator, condenser, throttle valve, evaporator, absorber, solution pump, high temperature heat exchanger, low temperature heat exchanger, ejector, domestic water exchange It is composed of a heater, and the accessories are composed of control valves and pipelines. When cooling, the concentrating plate generates 150-200°C high temperature to heat the lithium bromide aqueous solution in the high-pressure generator to generate high-temperature and high-pressure refrigerant water vapor. The water vapor reaches the low-pressure generator through the pipeline, and the water vapor reheats the lithium bromide aqueous solution in the low-pressure generator to generate again Refrigerant water vapor. At this time, the low-pressure generator is equivalent to the condenser of the high-pressure generator. The refrigerant steam releases heat in the low-pressure generator and condenses into refrigerant water. The refrigerant vapor generated in the condenser also enters the condenser and is condensed into refrigerant water by the condenser. In addition, a large amount of condensation heat passes through the domestic water heat exchanger to heat domestic water at the same time. The two streams of refrigerant water enter the evaporator through throttling. Since the pressure of the evaporator is very low, the refrigerant water evaporates in it to produce a cooling effect; the concentrated solution from the outlet of the high-pressure generator and the low-pressure generator passes through the high-temperature heat exchanger and the The low-temperature heat exchanger enters the absorber after the temperature is lowered. The solution can also be mixed with the dilute solution through the ejector and then enter the absorber, where it cools down and absorbs the refrigerant vapor from the evaporator. The absorbed solution becomes a dilute solution, which is transported by the solution pump, passes through the high-temperature heat exchanger and the low-temperature heat exchanger, and then reaches the high-pressure generator and low-pressure generator, and then repeats the process, so that the refrigeration device completes an absorption refrigeration cycle. High and low temperature heat exchangers are used to improve thermal efficiency.

During heating, the high-temperature and high-pressure steam generated by the high-pressure generator passes through the control valve, the domestic water heat exchanger, and then to the evaporator to produce heating effect and heat domestic water at the same time.

The high-voltage generator is equipped with an electric auxiliary heating rod, which can be used for cooling or heating when it is cloudy or at night.

The beneficial effect of the utility model is that the thermal energy of solar energy can be utilized multiple times, the thermal coefficient of the refrigeration device can be improved, and the heat discharge of the unit can be reduced. Manufacturing cost, easy productization and promotion.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Accompanying drawing is the working schematic diagram of the utility model

In the figure 1. Concentrating plate, 2. Electric heating rod, 3. High voltage generator, 4. Low temperature heat exchanger, 5. Ejector, 6. Absorber, 7. Pressure reducing valve, 8. Low pressure generator, 9 , Pressure reducing valve, 10, Condenser, 11, Throttle valve, 12, Evaporator, 13, Solution pump, 14, Ejector, 15, High temperature heat exchanger, 16, 17, Control valve, 18, Domestic water Heat exchanger, 19, hot water outlet, 20, cold water import.

Detailed ways

Below in conjunction with accompanying drawing, the concrete implementation of the present utility model is described further

As shown in the figure, a double-effect absorption air-conditioning system using solar energy uses water as the refrigerant and lithium bromide as the absorbent. It mainly includes concentrating plate (1), electric heating rod (2), high voltage generator (3), low temperature heat exchanger (4), ejector (5) (14), absorber (6), pressure reducing valve ( 7) (9), low pressure generator (8), condenser (10), throttle valve (11), evaporator (12), solution pump (13), high temperature heat exchanger (15), control valve (16 ) (17), domestic water heat exchanger (18). During refrigeration, the lithium bromide aqueous solution in the high-pressure generator (3) is heated to generate high-temperature refrigerant steam, which passes through the refrigerant steam outlet on the top of the high-pressure generator (3) and the control valve (17) to the steam inlet of the low-pressure generator (8). The high-temperature refrigerant vapor reheats the lithium bromide aqueous solution in the low-pressure generator (8) to generate refrigerant vapor again, which is connected to the inlet of the condenser (10) through the top outlet, and the low-pressure generator (8) is now equivalent to the high-pressure generator (3). The condenser, the refrigerant steam becomes refrigerant water after releasing heat in the low-pressure generator (8), and the outlet of the refrigerant water is also connected to the inlet of the condenser (10) through the pressure reducing valve (9), so that there will be two The refrigerant enters the condenser (10), is condensed into refrigerant water in the condenser (10), and is connected to the inlet of the evaporator (12) through the refrigerant water outlet through the throttle valve (11), and the refrigerant water is throttled After decompression, it evaporates and absorbs heat in the evaporator (12), thereby producing a refrigeration effect. The outlet of the evaporator (12) is connected to the refrigerant steam inlet of the absorber (6), so that the steam is continuously sucked away by the absorber (6), and the concentrated solution outlet of the high-pressure generator (3) passes through the high-temperature heat exchanger (15 ) ejector (14) pressure reducing valve (7) is connected with the solution inlet of absorber (6); the concentrated solution outlet of low pressure generator (8) is decompressed through low temperature heat exchanger (4) Valve (7) is connected to the solution inlet of absorber (6). The lithium bromide aqueous solution in the high-pressure generator (3), the low-pressure generator (8) becomes a concentrated solution after being heated and evaporated, and passes through the high-temperature heat exchanger (15), the low-temperature heat exchanger (4), and the ejector (14) ( 5), the pressure reducing valve (7) reaches the absorber (6) to absorb the refrigerant vapor to become a dilute solution, and the dilute solution outlet of the absorber (6) passes through the solution pump (13), the high temperature heat exchanger (15) and the high pressure generator (3) The inlet of the dilute solution is connected, and the outlet of the dilute solution of the absorber (6) is connected to the inlet of the dilute solution of the low-pressure generator (8) through the solution pump (13), the low-temperature heat exchanger (4), and the dilute solution is passed through the solution pump ( 13) Pressurization is sent to the high-pressure generator (3) and the low-pressure generator (8) after the temperature is increased by the high-temperature heat exchanger (15) and the low-temperature heat exchanger (4) respectively to complete the process of absorption and generation. During refrigeration, a large amount of heat of condensation of the condenser (10) heats the water in the domestic water heat exchanger (18) simultaneously, which satisfies domestic use.

During heating, the high-temperature and high-pressure steam generated by the high-pressure generator (3) reaches the evaporator (12) through the control valve (16) and the domestic water heat exchanger (18), directly producing heating effect and providing domestic hot water. The high-pressure generator ( 3) The steam outlet is connected to the inlet of the domestic water heat exchanger (18) through the control valve (16), and the outlet is connected to the inlet of the evaporator (12). Condensed water is added to the high pressure generator after being pressurized by the solution pump (13) to complete the heating cycle. The opening and closing of the control valve (16) (17) can control the cooling or heating of the unit and neither cooling nor heating.

Claims (4)

1. A solar energy double-effect absorption air conditioner, using the high temperature generated by a solar concentrator as a heat source, lithium bromide and water as a double-effect absorption air conditioner as a working medium, mainly including a light concentrator (1), a high voltage generator (3), Low pressure generator (8), absorber (6), evaporator (12), condenser (10), solution pump (13), high temperature heat exchanger (15), low temperature heat exchanger (4), domestic water exchange The heater (18) is characterized in that: the refrigerant steam outlet of the high-pressure generator (3) is connected to the steam inlet of the low-pressure generator (8) through the control valve (17), and the refrigerant steam outlet of the high-pressure generator (3) The other path is connected to the inlet of the evaporator (12) through the control valve (16), the domestic water heat exchanger (18), and the refrigerant water outlet of the low-pressure generator (8) is connected to the condenser (10) through the pressure reducing valve (9). ) inlet, the refrigerant vapor outlet of the low-pressure generator (8) is also connected to the inlet of the condenser (10), and the refrigerant water outlet of the condenser (10) is connected to the inlet of the evaporator (12) through the throttle valve (11) , the outlet of the evaporator (12) is connected to the steam inlet of the absorber (6), the dilute solution outlet of the absorber (6) is connected to the inlet of the solution pump (13), and the outlet of the solution pump (13) passes through the high temperature heat exchanger (15) is connected with the dilute solution inlet of high-pressure generator (3), and another road of solution pump (13) outlet is connected with the dilute solution inlet of low-pressure generator (8) through low-temperature heat exchanger (4), and high-pressure generator (3) ) concentrated solution outlet is connected with the concentrated solution inlet of absorber (6) through high temperature heat exchanger (15), ejector (14), pressure reducing valve (7), and the concentrated solution outlet of low pressure generator (8) is passed through The low-temperature heat exchanger (4), ejector (5) pressure reducing valve (7) is also connected with the concentrated solution inlet of the absorber (6). 2. The solar double-effect absorption air conditioner according to claim 1, characterized in that: the high-voltage generator (3) is a heat-collecting high-voltage generator, and the solar concentrator (1) and the high-voltage generator (3) have corresponding positional relationship. 3. The solar double-effect absorption air conditioner according to claim 1, characterized in that: the condenser (10) and the domestic water heat exchanger (18) are in a front-to-back positional relationship or an up-down positional relationship. 4. The solar double-effect absorption air conditioner according to claim 1, characterized in that: the system is equipped with two generators of high pressure and low pressure, and two solution heat exchangers of high temperature and low temperature.

Images