CN219797565U - Cold and hot double-storage type groove type solar energy absorption refrigeration system - Google Patents

Abstract

The utility model provides a cold and hot double-storage type groove type solar energy absorption refrigerating system, which comprises a refrigerating unit, a solar heat collector, a cooling tower and a tail end air conditioner, wherein the solar heat collector is communicated with the refrigerating unit through a first circulating pipeline, and the solar heat collector provides a heat source for the refrigerating unit through the first circulating pipeline; the cooling tower is communicated with the refrigerating unit through a second circulation pipeline, and the cooling tower provides cooling water for the refrigerating unit through the second circulation pipeline; the refrigerating unit is communicated with the tail end air conditioner through a third circulating pipeline, and the refrigerating unit supplies cold for the tail end air conditioner through the third circulating pipeline. The refrigerating system fully utilizes solar energy resources in summer and high-temperature seasons, combines a lithium bromide absorption refrigerating unit and is coupled with a heat source end heat storage oil tank and a tail end side heat storage water tank to form cold and hot double storages, and can effectively reduce the energy consumption of an air conditioning system.

Description

Cold and hot double-storage type groove type solar energy absorption refrigeration system

Technical Field

The utility model relates to the technical field of air conditioner refrigeration, in particular to a cold and hot double-storage type groove type solar energy absorption refrigeration system.

Background

The air conditioning system brings people with an environment with proper temperature, proper humidity and clean air, but the air conditioner is an energy consumption user of a modern building. According to data statistics, annual energy consumption of the central air conditioning system accounts for 40-60% of annual energy consumption of the whole building, and the industry is called energy consumption households.

The lithium bromide absorption refrigerating unit can be used for cooling a building, has low power consumption, relieves the power shortage state, adopts water as a refrigerant, adopts lithium bromide solution as an absorption liquid, and is safe and harmless to the environment. The lithium bromide absorption refrigerating unit has the advantages of few operating parts, few wearing parts, convenient maintenance, small vibration, low noise and the like.

Therefore, a cold and hot double-storage type solar absorption refrigeration system is needed, and the energy consumption of an air conditioning system is reduced.

Disclosure of Invention

The utility model aims to provide a cold and hot double-storage type groove type solar energy absorption refrigerating system which fully utilizes solar energy resources in summer and high-temperature seasons, combines a lithium bromide absorption refrigerating unit and is coupled with a heat source end heat storage oil tank and a tail end side heat storage water tank to form cold and hot double storages, and can effectively reduce energy consumption of an air conditioning system.

In order to achieve the above object, the present utility model provides the following technical solutions:

the cold and hot double-storage type groove type solar energy absorption refrigerating system comprises a refrigerating unit, a solar heat collector, a cooling tower and a tail end air conditioner, wherein the refrigerating unit is a lithium bromide absorption refrigerating unit; the solar heat collector is communicated with the refrigerating unit through a first circulating pipeline, and the solar heat collector provides a heat source for the refrigerating unit through the first circulating pipeline; the cooling tower is communicated with the refrigerating unit through a second circulation pipeline, and the cooling tower provides cooling water for the refrigerating unit through the second circulation pipeline; the refrigerating unit is communicated with the tail end air conditioner through a third circulating pipeline, and the refrigerating unit supplies cold for the tail end air conditioner through the third circulating pipeline.

Further, in the above-mentioned cold-hot double-storage tank type solar energy absorption refrigeration system, the refrigeration unit includes a generator, an absorber, an evaporator and a condenser, the generator is connected with the condenser through a first pipeline, the condenser is connected with the evaporator through a second pipeline, the evaporator is connected with the absorber through a third pipeline, the absorber is connected with the generator through a fourth pipeline, and a fifth pipeline is also communicated between the generator and the absorber; flow regulating valves are arranged on the first pipeline, the third pipeline and the fifth pipeline; a throttle valve is arranged on the second pipeline; and a solution pump is arranged on the fourth pipeline.

Further, in the above-mentioned cold-hot double-storage tank type solar absorption refrigeration system, the fourth pipeline is provided with a solution heat exchanger, and the fifth pipeline is communicated with the solution heat exchanger.

Further, in the above-mentioned cold and hot double-storage type trough solar absorption refrigeration system, the solar heat collector is a trough solar heat collector, a heating coil is arranged in the generator, and the heating coil, the oil return pipe, the first oil supply pipe, the second oil supply pipe and the heating coil are sequentially communicated and form the first circulation pipeline; and the oil return pipe is provided with a heat collector pump.

Further, in the above-mentioned cold and hot double-storage type solar absorption refrigeration system, the system further comprises a heat storage oil tank, a first valve, a second valve and a fifth valve, wherein one side wall of the heat storage oil tank is respectively communicated with the second valve and the second oil supply pipe, the second valve is communicated with the oil return pipe through a pipeline, and the other opposite side wall of the heat storage oil tank is communicated with the first oil supply pipe; the first oil supply pipe is communicated with the second oil supply pipe through the first valve, and the fifth valve is arranged on a pipeline connecting the heat storage oil tank and the first oil supply pipe.

Further, in the above-mentioned cold-hot double-storage type solar absorption refrigeration system, the cooling tower, the absorber, the condenser and the cooling tower are sequentially communicated to form the second circulation pipeline for cooling water circulation; and a cooling water pump is arranged on the second circulating pipeline between the cooling tower and the absorber.

Further, in the above-described solar absorption refrigeration system, a heat recovery device is provided on the second circulation line between the condenser and the cooling tower, and a tap water line is connected to the heat recovery device.

Further, in the above-mentioned cold-hot double-storage type solar absorption refrigeration system, the system further comprises a cold storage water tank, a first water supply pipe, a second water supply pipe and a water return pipe, wherein a heat transfer pipe is arranged in the evaporator, and the heat transfer pipe, the first water supply pipe, the second water supply pipe, the terminal air conditioner, the water return pipe and the heat transfer pipe are sequentially communicated to form the third circulation pipeline; and the second water supply pipeline is provided with a tail end water pump.

Further, in the above-mentioned cold-hot double-storage tank type solar energy absorption refrigeration system, further comprising a third valve, a fourth valve and a sixth valve, wherein one side wall of the cold storage water tank is respectively communicated with the fourth valve and the second water supply pipe, the fourth valve is communicated with the water return pipe through a pipeline, the other opposite side wall of the cold storage water tank is communicated with the first water supply pipe, the first water supply pipe is communicated with the second water supply pipe through the third valve, and the sixth valve is arranged on the pipeline between the cold storage water tank and the second water supply pipe.

Further, in the cold and hot double-storage type solar absorption refrigeration system, one end of a spray pipe is communicated with the bottom of the evaporator, the other end of the spray pipe is positioned in the evaporator, and a plurality of spray heads are arranged on the spray pipe; and a refrigerant pump is arranged on the spray pipe.

The analysis shows that the utility model discloses a cold and hot double-storage type groove type solar energy absorption refrigerating system, which provides a heat source for a refrigerating unit through a solar heat collector, provides cooling water for the refrigerating unit through a cooling tower, is provided with a heat storage oil tank at one side of the solar heat collector and is provided with a cold storage water tank at one side of a tail end air conditioner. The system fully utilizes solar energy resources in summer and high temperature season, combines a lithium bromide absorption refrigerating unit and couples a heat storage oil tank and a cold storage water tank to form cold and hot double storages, and can effectively reduce the energy consumption of an air conditioning system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Reference numerals illustrate: 1, a refrigerating unit; 2 a solar collector; 3, a cooling tower; 4 a generator; 5 an absorber; 6 an evaporator; 7 a condenser; 8 a first pipeline; 9 a second pipeline; 10 a third pipeline; 11 fourth piping; a fifth pipeline 12; 13 a throttle valve; 14 a solution pump; 15 a solution heat exchanger; 16 heating coils; 17 a first oil supply pipe; 18 an oil return pipe; 19 collector pump; 20 heat storage oil tanks; 21 a cooling water pump; 22 heat recoverer; 23 tap water lines; 24 cold-storage water tanks; 25 heat transfer tubes; a first water supply line 26; 27 return pipes; 28 end water pump; 29 spray pipes; 30 spray heads; 31 a refrigerant pump; 32 a first valve; 33 a second valve; 34 a third valve; a fourth valve 35; 36 a fifth valve; 37 a sixth valve; 38 a second oil supply pipe; 39 a second water supply line; 40 a second circulation line; 41 flow regulating valve.

Detailed Description

The utility model will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the utility model and not limitation of the utility model. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present utility model encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.

One or more examples of the utility model are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the utility model. As used herein, the terms "first," "second," and "third," etc. are used interchangeably to distinguish one component from another and are not intended to represent the location or importance of the individual components.

As shown in fig. 1, according to an embodiment of the present utility model, there is provided a cold and hot double-storage type solar absorption refrigeration system, including a refrigeration unit 1, a solar heat collector 2, a cooling tower 3 and an end air conditioner, wherein the refrigeration unit 1 is a lithium bromide absorption refrigeration unit; the solar heat collector 2 is communicated with the refrigerating unit 1 through a first circulation pipeline, and the solar heat collector 2 provides a heat source for the refrigerating unit 1 through the first circulation pipeline; the cooling tower 3 is communicated with the refrigerating unit 1 through a second circulation pipeline 40, and the cooling tower 3 provides cooling water for the refrigerating unit 1 through the second circulation pipeline 40; the refrigerating unit 1 is communicated with the tail end air conditioner through a third circulation pipeline, and the refrigerating unit 1 supplies cold for the tail end air conditioner through the third circulation pipeline.

Further, the refrigerating unit 1 comprises a generator 4, an absorber 5, an evaporator 6 and a condenser 7, wherein the generator 4 is connected with the condenser 7 through a first pipeline 8, the condenser 7 is connected with the evaporator 6 through a second pipeline 9, the evaporator 6 is connected with the absorber 5 through a third pipeline 10, the absorber 5 is connected with the generator 4 through a fourth pipeline 11, and a fifth pipeline 12 is also communicated between the generator 4 and the absorber 5; the first pipeline 8, the third pipeline 10 and the fifth pipeline 12 are provided with flow regulating valves 41, and the flow regulating valves 41 are used for regulating the flow of the first pipeline 8, the third pipeline 10 and the fifth pipeline 12. A throttle valve 13 is arranged on the second pipeline 9, and the throttle valve 13 plays a role in throttling and reducing pressure; the fourth line 11 is provided with a solution pump 14.

The evaporator 6 is a component for preparing cold by evaporating an air conditioner, and generally adopts a shell-and-tube heat exchanger, wherein a spray type structure is adopted in the interior, after refrigerant water is pumped to the evaporator 6 by a refrigerant pump 31, the refrigerant water is sprayed to the outer surface of the heat transfer tube 25 and is continuously evaporated, and the refrigerant water absorbs heat of circulating water in the heat transfer tube 25, so that the temperature of the refrigerant water is reduced to achieve the aim of refrigeration.

The absorber 5 provides the low pressure required for the evaporator 6, also a shell and tube heat exchanger, also internally of a spray type configuration. After the refrigerant vapor passing through the third line 10 from the evaporator 6 is absorbed by the sprayed concentrated solution, the pressure is reduced to form a negative pressure, and the lithium bromide solution is changed from the concentrated solution to the diluted solution. The heat is taken away by the cooling water flowing in the second circulation line 40.

The generator 4 is a very critical component of the refrigeration unit 1, and the lithium bromide solution absorbed with water vapor is sent to the generator 4 by the solution pump 14, and heated in the generator 4 to re-separate the water vapor and the lithium bromide solution.

The condenser 7 is a place where the refrigerating unit 1 radiates heat, and is also a shell-and-tube heat exchanger, the refrigerant vapor from the generator 4 through the first pipeline 8 condenses into liquid water on the surface of the second circulation pipeline 40 in the condenser 7, and the released heat is taken away by the cooling water flowing in the second circulation pipeline 40.

Further, the fourth pipeline 11 is provided with a solution heat exchanger 15, and the fifth pipeline 12 is communicated with the solution heat exchanger 15. The lithium bromide concentrated solution in the fifth pipeline 12 exchanges heat with the lithium bromide diluted solution in the fourth pipeline 11 in the solution heat exchanger 15, and the temperature of the diluted solution in the fourth pipeline 11 is increased.

Further, the solar heat collector 2 is a trough type solar heat collector, the heating coil 16 is arranged in the generator 4, and the heating coil, the oil return pipe, the first oil supply pipe, the second oil supply pipe and the heating coil are sequentially communicated and form a first circulation pipeline for circulation of heat conduction oil; the oil return pipe 18 is provided with a collector pump 19. The solar heat collector 2 absorbs solar energy and then heats the heat conduction oil in the first circulation pipeline, and the circulation of the heat conduction oil in the first circulation pipeline can heat the lithium bromide solution in the generator 4 through the heating coil 16, so that the purpose of providing a heat source for the refrigerating unit 1 by utilizing the solar heat collector 2 is realized.

Further, the heat storage oil tank 20, the first valve 32, the second valve 33 and the fifth valve 36 are further included, one side wall of the heat storage oil tank 20 is respectively communicated with the second valve 33 and the second oil supply pipe 38, the second valve 33 is communicated with the oil return pipe 18 through a pipeline, and the other opposite side wall of the heat storage oil tank 20 is communicated with the first oil supply pipe 17; the first oil supply pipe 17 and the second oil supply pipe 38 are communicated with each other through the first valve 32, and a fifth valve 36 is provided in a line connecting the thermal storage tank 20 and the second oil supply pipe 38.

Solar heat collection side working mode valve switching:

1) Direct heating mode: the first valve 32 is opened, the second valve 33 is closed, the fifth valve 36 is closed, after the solar heat collector 2 absorbs solar energy to heat heating oil, the heating oil flows through the first oil supply pipe 17, the second oil supply pipe 38, the heating coil 16 and the oil return pipe 18 in the generator 4 in sequence and then flows back to the solar heat collector 2, circulation of the heating oil is completed, and the solar heat collector 2 directly provides a heat source for the refrigerating unit 1.

2) Heat storage while heating mode: the first valve 32 is closed, the second valve 33 is closed, the fifth valve 36 is opened, after the solar heat collector 2 absorbs solar energy to heat heating oil, the heating oil sequentially flows through the first oil supply pipe 17, the heat storage oil tank 20, the second oil supply pipe 38, the heating coil 16 and the oil return pipe 18 in the generator 4 and then flows back to the solar heat collector 2, circulation of the heating oil is completed, and when the heating oil flows through the heat storage oil tank 20, a part of heat of the heating oil is stored in the heat storage oil tank 20, so that the purpose of providing a heat source for the refrigerating unit 1 while storing heat is achieved.

3) Heat storage tank 20 heating mode: when no solar energy exists, the first valve 32 is opened, the second valve 33 is opened, the fifth valve 36 is closed, and the heating oil sequentially flows through the heat storage oil tank 20, the first oil supply pipe 17, the second oil supply pipe 38, the heating coil 16 in the generator 4, the oil return pipe 18 and the heat storage oil tank 20, so that the circulation of the heating oil is completed, the heating oil is heated by utilizing the heat stored in the heat storage oil tank 20, and the heating oil heats the lithium bromide solution in the generator 4 through the heating coil 16, thereby realizing the purpose of providing a heat source for the refrigerating unit 1 by utilizing the heat storage oil tank 20.

The heat storage oil tank 20 can store heat when solar energy exists, and heat is supplied by the heat storage oil tank 20 when solar energy does not exist, so that heat required by normal operation of the refrigerating unit 1 is ensured.

Further, the cooling tower 3, the absorber 5, the condenser 7 and the cooling tower 3 are sequentially communicated to form a second circulation pipeline 40 for circulation of cooling water, the cooling tower 3 supplies cooling water to the absorber 5 and the condenser 7 through the second circulation pipeline 40, the cooling water absorbs heat when flowing through the absorber 5 and the condenser 7, and the cooling water releases heat to the atmosphere through the cooling tower 3. A cooling water pump 21 is provided in the second circulation line 40 between the cooling tower 3 and the absorber 5. The cooling water pump 21 can improve the circulation efficiency of the cooling water in the second circulation line 40.

Further, a heat recovery device 22 is provided in the second circulation line 40 between the condenser 7 and the cooling tower 3, and a tap water line 23 communicates with the heat recovery device 22. The cooling water after absorbing heat heats tap water in a tap water pipeline 23 in a heat recoverer 22, can provide domestic hot water to the outside, realizes the recycling of waste heat, and effectively reduces energy consumption.

Further, the evaporator 6 is internally provided with a heat transfer pipe 25, and the heat transfer pipe 25, the first water supply pipe 26, the second water supply pipe 39, the terminal air conditioner, the water return pipe 27 and the heat transfer pipe 25 are sequentially communicated to form a third circulation pipeline; the second water supply pipe 39 is provided with a terminal water pump 28. The end water pump 28 can improve the circulation efficiency of the water in the third circulation line.

Further, the cold storage water tank 24 further comprises a third valve 34, a fourth valve 35 and a sixth valve 37, wherein one side wall of the cold storage water tank 24 is respectively communicated with the fourth valve 35 and the second water supply pipe 39, the fourth valve 35 is communicated with the water return pipe 27 through a pipeline, the other opposite side wall of the cold storage water tank 24 is communicated with the first water supply pipe 26, the first water supply pipe 26 is communicated with the second water supply pipe 39 through the third valve 34, and the sixth valve 37 is arranged on the pipeline between the cold storage water tank 24 and the second water supply pipe 39.

The valves of each working mode at the side of the cold accumulation water tank 24 are switched:

1. normal cooling mode: when the refrigerating unit 1 is normally opened, the third valve 34 is opened, the fourth valve 35 is closed, the sixth valve 37 is closed, and water flows through the return pipe 27, the heat transfer pipe 25 in the evaporator 6, the first water supply pipe 26 and the second water supply pipe 39 in sequence, and then is sent to the terminal air conditioner through the terminal water pump 28, so that a normal cooling mode is realized.

2. Cold supply and accumulation mode: when the refrigerating unit 1 is normally opened, the third valve 34 is closed, the fourth valve 35 is closed, the sixth valve 37 is opened, and water flows through the water return pipe 27, the heat transfer pipe 25 in the evaporator 6, the first water supply pipe 26, the cold storage water tank 24 and the second water supply pipe 39 in sequence, and then is sent to the terminal air conditioner through the terminal water pump 28, so that the cold storage and cooling mode is realized.

3. Cooling mode: when the refrigerating unit 1 is closed, the third valve 34 is opened, the fourth valve 35 is opened, the sixth valve 37 is closed, and water flows through the water return pipe 27, the cold storage water tank 24, the first water supply pipe 26 and the second water supply pipe 39 in sequence and then is sent to the terminal air conditioner through the terminal water pump 28, so that the cold storage water tank 24 is in a cold release mode.

The cold accumulation water tank 24 can be used for cooling the tail end air conditioner when the refrigerating unit 1 is started or closed.

Further, one end of a spray pipe 29 is communicated with the bottom of the evaporator 6, the other end of the spray pipe 29 is positioned in the evaporator 6, and a plurality of spray heads 30 are arranged on the spray pipe 29; the shower 29 is provided with a coolant pump 31.

The working principle of the refrigerating system is as follows: the heating coil 16 heats and concentrates the lithium bromide solution in the generator 4, and the lithium bromide solution is evaporated at a low temperature in a vacuum state by utilizing an absorption effect to generate refrigerant vapor, so that the lithium bromide solution is concentrated into a concentrated solution. The concentrated solution flows back to the absorber 5 through the fifth line 12, and after heat exchange in the solution heat exchanger 15 with the diluted solution flowing to the generator 4 in the fourth line 11, the temperature is reduced in the fifth line 12. The refrigerant vapor generated by the generator 4 flows into the condenser 7 through the first pipe 8, is cooled into refrigerant water by the cooling water flowing through the second circulation pipe 40 of the condenser 7, and the heat of the refrigerant vapor is dissipated into the atmosphere by the cooling tower 3 through the circulation of the cooling water in the second circulation pipe 40.

The refrigerant water generated by the condenser 7 enters the evaporator 6 after being throttled and depressurized by the throttle valve 13 through the second pipeline 9, one part of the refrigerant water is flashed into refrigerant steam due to lower pressure in the evaporator 6, the other part of the refrigerant water is cooled into saturated refrigerant water due to the fact that heat is taken away by the flashed part of the refrigerant water, the saturated refrigerant water in the water tray flows into a water tray of the evaporator 6, the saturated refrigerant water in the water tray is pumped out by the refrigerant pump 31 and sprayed on the surface of the heat transfer tube 25 in the evaporator 6 through the spray nozzle 30 on the spray tube 29, and the refrigerant steam is formed by boiling and evaporating by absorbing the heat of the water flowing through the heat transfer tube 25. The water in the heat transfer pipe 25 is cooled after the heat is carried by the coolant water, flows out of the refrigerating unit 1, and returns to the user system as cold water for terminal air conditioning.

The refrigerant vapor generated by the evaporator 6 enters the absorber 5 together with the refrigerant vapor generated by flash, and the refrigerant vapor is absorbed by the concentrated solution in the absorber 5. After absorbing the refrigerant vapor, the concentration of the concentrated solution is reduced to be a dilute solution, and the dilute solution in the absorber 5 is pumped out by the solution pump 14 on the fourth pipeline 11, heated by the solution heat exchanger 15 and then enters the generator 4 for heating and concentration. This process is continuously cycled and the evaporator 6 continuously produces chilled water at the desired temperature.

In the refrigerating unit 1, liquid water is in a negative pressure condition in the evaporator 6, so that evaporation absorbs heat, water vapor is absorbed by lithium bromide solution in the absorber 5, the diluted lithium bromide solution is sent to the generator 4 by the solution pump 14, the generator 4 is heated, the water vapor and the lithium bromide solution are separated again, the water vapor is condensed into liquid water in the condenser 7, and then the liquid water enters the evaporator 6 for evaporation, so that the purpose of refrigeration is achieved.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

a cold and hot double-storage type groove type solar energy absorption refrigerating system provides a heat source for a refrigerating unit 1 through a solar heat collector 2, cooling water is provided for the refrigerating unit 1 through a cooling tower 3, a heat storage oil tank 20 is arranged on one side of the solar heat collector 2, and a cold storage water tank 24 is arranged on one side of a terminal air conditioner. The system fully utilizes solar energy resources in summer and high temperature season, combines the lithium bromide absorption refrigerating unit 1 and couples the heat storage oil tank 20 and the cold storage water tank 24 to form cold and hot double storages, and can effectively reduce the energy consumption of an air conditioning system.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A cold and hot double-storage type solar energy absorption refrigerating system is characterized by comprising a refrigerating unit, a solar heat collector, a cooling tower and a tail end air conditioner, wherein,

the refrigerating unit is a lithium bromide absorption refrigerating unit;

the solar heat collector is communicated with the refrigerating unit through a first circulating pipeline, and the solar heat collector provides a heat source for the refrigerating unit through the first circulating pipeline;

the cooling tower is communicated with the refrigerating unit through a second circulation pipeline, and the cooling tower provides cooling water for the refrigerating unit through the second circulation pipeline;

the refrigerating unit is communicated with the tail end air conditioner through a third circulating pipeline, and the refrigerating unit supplies cold for the tail end air conditioner through the third circulating pipeline.

2. The cold and hot double-storage type solar absorption refrigeration system according to claim 1, wherein,

the refrigerating unit comprises a generator, an absorber, an evaporator and a condenser, wherein the generator is connected with the condenser through a first pipeline, the condenser is connected with the evaporator through a second pipeline, the evaporator is connected with the absorber through a third pipeline, the absorber is connected with the generator through a fourth pipeline, and a fifth pipeline is also communicated between the generator and the absorber;

flow regulating valves are arranged on the first pipeline, the third pipeline and the fifth pipeline;

a throttle valve is arranged on the second pipeline;

and a solution pump is arranged on the fourth pipeline.

3. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

the fourth pipeline is provided with a solution heat exchanger, and the fifth pipeline is communicated with the solution heat exchanger.

4. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

the solar heat collector is a trough type solar heat collector, a heating coil is arranged in the generator, and the heating coil, the oil return pipe, the first oil supply pipe, the second oil supply pipe and the heating coil are sequentially communicated and form a first circulating pipeline;

and the oil return pipe is provided with a heat collector pump.

5. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 4, wherein,

the device comprises a first oil supply pipe, a second oil supply pipe, a first valve, a second valve and a fifth valve, wherein one side wall of the first oil supply pipe is communicated with the first valve;

the first oil supply pipe is communicated with the second oil supply pipe through the first valve, and the fifth valve is arranged on a pipeline connecting the heat storage oil tank and the first oil supply pipe.

6. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

the cooling tower, the absorber, the condenser and the cooling tower are sequentially communicated to form the second circulating pipeline for cooling water circulation;

and a cooling water pump is arranged on the second circulating pipeline between the cooling tower and the absorber.

7. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

and a heat recoverer is arranged on the second circulating pipeline between the condenser and the cooling tower, and a tap water pipeline is communicated with the heat recoverer.

8. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

the evaporator is internally provided with a heat transfer pipe, and the heat transfer pipe, the first water supply pipe, the second water supply pipe, the terminal air conditioner, the water return pipe and the heat transfer pipe are sequentially communicated to form a third circulation pipeline;

and the second water supply pipeline is provided with a tail end water pump.

9. The cold and hot double-storage type solar absorption refrigeration system according to claim 8, wherein,

the cold accumulation water tank is characterized by further comprising a third valve, a fourth valve and a sixth valve, wherein one side wall of the cold accumulation water tank is respectively communicated with the fourth valve and the second water supply pipe, the fourth valve is communicated with the water return pipe through a pipeline, the other opposite side wall of the cold accumulation water tank is communicated with the first water supply pipe, the first water supply pipe is communicated with the second water supply pipe through the third valve, and the sixth valve is arranged on the pipeline between the cold accumulation water tank and the second water supply pipe.

10. A cold and hot double-storage type solar energy absorption refrigeration system according to claim 2, wherein,

the bottom of the evaporator is communicated with one end of a spray pipe, the other end of the spray pipe is positioned in the evaporator, and a plurality of spray heads are arranged on the spray pipe;

and a refrigerant pump is arranged on the spray pipe.