Solar driven absorption water production device with coupling loop heat pipe and solution energy storage

Abstract

The application belongs to the technical field of solar absorption refrigeration and air water production, and discloses a solar-driven absorption water production device coupled with a loop heat pipe and a solution energy storage.The application has two working states, namely, a charging state and a discharging state.The energy storage unit converts the excess solar energy into the chemical potential energy of the solution and stores the chemical potential energy into a storage tank when the solar energy is sufficient.The energy storage unit can continue to maintain the operation of the absorption refrigeration when the solar energy is insufficient, and the water production process is completed.In the application, the absorption refrigeration unit adopts a water-lithium bromide working medium pair, the absorption refrigeration is driven by the solar energy to realize the cooling air dew condensation water production, the energy storage unit can ensure that the device can continuously work and produce water when the solar energy is insufficient, the heat pipe loop can improve the cold quantity transmission efficiency and the water production efficiency, and the device structure is compact.The application is energy-saving and environment-friendly, can satisfy the fresh water demand of people at any time, and can effectively solve the problem of lack of fresh water resources in coastal areas.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of solar absorption refrigeration and air water production, and more particularly relates to a solar-driven absorption water production device coupled with a loop heat pipe and solution energy storage. BACKGROUND

[0002] With the continuous growth of the world population, the scarcity of potable fresh water resources has become a problem that must be solved for future development. Although about 70% of the earth's surface is covered with water, most of it is sea water, and less than 3% of it is directly drinkable fresh water. Of this, 70% of the fresh water is in glaciers and is mainly distributed in the polar regions, which is difficult for humans to utilize, and the recycling of water resources is of great significance.

[0003] Current water production methods include seawater desalination and air water production. Traditional seawater desalination devices are large in size, high in investment cost, large in land occupation, and require a large amount of energy for operation. Air water production condenses water vapor in the air to obtain relatively pure water. Moreover, air resources are abundant, and the atmosphere contains a large amount of water vapor, with a total water content of about 13 trillion tons, which is an ideal source of fresh water. The efficiency of air water production is greatly related to the humidity of the air. The higher the air humidity, the stronger the water production capacity, and the lower the air humidity, the weaker the water production capacity. In order to maximize the benefits, air water production equipment should be placed in island areas with high air humidity.

[0004] Current solar air water production technology has been studied, mainly divided into refrigeration condensation type and adsorption desorption type. The adsorption desorption type uses an adsorbent to absorb water vapor in the air at high temperature and release enriched water vapor at low temperature to obtain fresh water. However, the adsorbent is generally an industrial salt, and a small amount of adsorbent will be contained in the fresh water, which will pose a risk to human health. The principle of the refrigeration condensation type is to use solar energy to cool the air to below the dew point temperature, and then condense the water vapor to obtain fresh water. Most of the current refrigeration condensation type uses absorption refrigeration, which can directly use solar energy for refrigeration, avoiding the energy loss of converting solar energy into electrical energy in other refrigeration methods. However, solar energy is unstable and discontinuous, and direct use of solar energy as a heat source will be affected, which cannot guarantee that fresh water can be obtained at any time, which is not conducive to people's living needs.

[0005] Therefore, it is necessary to develop a method that combines solar energy storage technology with absorption refrigeration, which is of great significance to solving the problem of fresh water scarcity. SUMMARY

[0006] In view of the above defects or improvement needs of the prior art, the present application provides a solar-driven absorption water production device coupled with a loop heat pipe and a solution energy storage, which aims to directly drive an absorption refrigeration unit by using low-grade solar energy, simplify the water production process, and convert excess solar energy into chemical potential energy to achieve all-weather water production.

[0007] To achieve the above-mentioned purpose, according to one aspect of the present application, a solar-driven absorption water production device coupled with a loop heat pipe and a solution energy storage is provided, which comprises a solar absorption refrigeration unit, an energy storage unit, and an air treatment water production unit, wherein:

[0008] The solar absorption refrigeration unit comprises a solar collector, a generator, a solution heat exchanger, an air-cooled condenser, an absorber, and a water-lithium bromide working pair; the solar collector heats the water-lithium bromide working pair in the generator by absorbing solar radiation, evaporates water vapor, forms a concentrated lithium bromide solution, the air-cooled condenser cools the water vapor to produce refrigerant water, and the concentrated lithium bromide solution is pre-cooled by the solution heat exchanger, then cooled by a cooler, and then enters a solution storage tank;

[0009] The energy storage unit comprises a solution storage tank and a refrigerant storage tank; the refrigerant water flows into an evaporator through the refrigerant storage tank, is evaporated by absorbing heat from the evaporator heat pipe condensing section, and then enters the absorber; the concentrated lithium bromide solution in the solution storage tank is transported to the absorber by an ejector to absorb water vapor and become a dilute solution; after flowing out of the absorber, part of the dilute solution is recycled back to the absorber, and the other part is sent to the solution heat exchanger to exchange heat with the concentrated lithium bromide solution, and then returns to the generator;

[0010] The evaporator heat pipe condensing section and the evaporator heat pipe evaporation section form a set of heat pipe loops, a fan drives the flow of humid air, the evaporator heat pipe evaporation section exchanges heat with the humid air of the air treatment water production unit in a countercurrent manner, and when the humid air is cooled to below the dew point temperature, condensate water is separated out to achieve water production.

[0011] Further, the generator heat pipe condensing section and the generator heat pipe evaporation section that form a heat pipe loop are further included; the solar collector concentrates solar radiation to the generator heat pipe evaporation section, and the generator heat pipe condensing section heats the water-lithium bromide working pair in the generator.

[0012] Further, the absorber heat pipe condensing section and the absorber heat pipe evaporation section that form a heat pipe loop are further included; the absorber heat pipe evaporation section is located inside the absorber, the heat generated by the absorption of water vapor by the concentrated lithium bromide solution is absorbed by the absorber heat pipe evaporation section and transferred to the absorber heat pipe condensing section, and finally the heat is transferred to the air by the cooler.

[0013] Further, the solar absorption refrigeration unit further comprises a liquid-liquid ejector and a solution pump;

[0014] When the solar energy is sufficient, the excess concentrated lithium bromide solution is stored in the solution storage tank, and the remaining concentrated lithium bromide solution enters the liquid-liquid ejector, mixes with the dilute solution from the absorber, and returns to the absorber to continue to absorb water vapor, realizing self-circulation.

[0015] The dilute solution flowing out of the absorber is pumped to the three-way valve V5 by the solution pump and is divided into two parts. One part of the dilute solution is sent to the liquid-liquid ejector to participate in self-circulation, and the other part is sent to the solution heat exchanger to exchange heat with the concentrated lithium bromide solution, and then returns to the generator.

[0016] Further, the air treatment water production unit comprises a fan, an air filter, a sensible heat exchanger, and a water pan.

[0017] After the wet air passes through the air filter, it first enters the sensible heat exchanger for pre-cooling, and then enters the evaporator heat pipe evaporation section for heat exchange. When the wet air is cooled to below the dew point temperature, condensed water is separated and stored in the water pan. After the condensed water is separated and dried, the air is sent to the sensible heat exchanger to exchange heat with the filtered wet air, and then sequentially passes through the absorber heat pipe condensing section, the cooler, and the air-cooled condenser to remove heat, and finally is discharged to the environment. The damper adjusts the air volume entering the air-cooled condenser, the cooler, and the absorber heat pipe condensing section.

[0018] Further, the bottom of the solution storage tank is provided with first to fourth interfaces. The first and second interfaces are located on the dilute solution side of the solution storage tank, and the third and fourth interfaces are located on the concentrated solution side of the solution storage tank.

[0019] One part of the dilute solution flowing out of the absorber is divided into two paths. One path is connected to the solution heat exchanger and is controlled by the first electromagnetic valve, and the other path is connected to the first interface and is controlled by the second electromagnetic valve.

[0020] The lithium bromide solution on the dilute solution side of the solution storage tank flows into the absorber through the second interface and is controlled by the third electromagnetic valve. The lithium bromide solution on the concentrated solution side of the solution storage tank flows into the ejector through the fourth interface and is transported to the absorber, and is controlled by the fourth electromagnetic valve, for mixing with a part of the dilute solution flowing out of the absorber and recycling back to the absorber.

[0021] The concentrated lithium bromide solution cooled by the solution heat exchanger and the cooler flows into the concentrated solution side of the solution storage tank through the third interface. The dilute solution of the absorber in the energy release mode flows back to the dilute solution side of the solution storage tank through the first interface and is controlled by the second electromagnetic valve.

[0022] Further, the solution storage tank is provided with a plurality of partitions.

[0023] Further, when the solar energy is sufficient, the first electromagnetic valve is opened, and the device is in the energy storage water production state. When the solar energy is insufficient, the first electromagnetic valve is closed, and the device is in the energy release water production state.

[0024] Further, the energy storage unit further comprises an absorber pressure controller and an absorber liquid level controller;

[0025] The absorber pressure controller is used to control the fourth electromagnetic valve to adjust the amount of lithium bromide concentrated solution entering the absorber; when the absorber pressure is lower than the set value, the fourth electromagnetic valve is closed, and when the absorber pressure is higher than the set value, the fourth electromagnetic valve is opened, and the concentrated solution is supplemented to the absorber;

[0026] The second electromagnetic valve and the third electromagnetic valve are controlled by the absorber liquid level controller; when the absorber liquid level is lower than the set value, the third electromagnetic valve is opened, and the second electromagnetic valve is closed, and part of the solution in the solution storage tank is supplemented to the absorber through the third electromagnetic valve to increase the absorber liquid level; when the absorber liquid level is higher than the set value, the second electromagnetic valve is opened, and the third electromagnetic valve is closed, and the three-way valve adjusts the proportion of the solution flow rate to the first interface to reduce the absorber liquid level.

[0027] Further, the evaporator comprises a plurality of evaporation boxes, and the refrigerant water is evaporated in several parts, and an evaporator liquid level controller group is arranged to control the liquid level in the evaporation boxes to be within a specified height range.

[0028] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0029] 1. The absorption refrigeration unit in the present application is driven by solar energy, which takes advantage of the abundant solar energy in island areas to produce water, reduces the pressure of using electricity in islands, and saves energy and protects the environment. The solution energy storage unit solves the problem of discontinuity and instability of solar energy. When the solar energy is sufficient, the excess solar energy is converted into chemical potential energy of the solution for storage; when the solar energy is insufficient, the chemical potential energy of the solution is released to continuously supply energy to the device to complete air water production. At the same time, the chemical potential energy storage is not easily affected by the environment temperature, and the energy storage effect is good.

[0030] 2. The present application uses a heat pipe loop design: the generator heat pipe can avoid the solar collector directly transferring heat to the solution, so that the solution temperature is too high to cause component damage. The absorber heat pipe and the evaporator heat pipe can realize long-distance energy transmission to avoid complex device structure.

[0031] 3. The present application comprises a solar absorption refrigeration unit, an energy storage unit and an air water production unit, which are coupled through a heat pipe loop to realize miniaturization of the device. The heat pipe evaporation section is located in the air water production unit, and the wet air is cooled and dewed; the heat pipe condensing section is located in the evaporator box of the refrigeration unit, and the refrigerant is evaporated by absorbing heat. The energy consumption is small, the refrigeration unit adopts air cooling, which expands the application range of the device, and the air water production unit is provided with a condensate water filtering, purifying and disinfecting unit, which is convenient for water taking.

[0032] 4. The present application has two working states, namely, charging state and discharging state. When the solar energy is sufficient, the unit belongs to the charging state. The solar collector absorbs the amount of solar radiation, and the generator receives the heat transferred by the solar collector to heat the working pair of the solution, and the air-cooled condenser condenses the refrigerant. The refrigerant tank stores the excess refrigerant; another part enters the evaporator, absorber and participates in the normal absorption refrigeration cycle in turn. The solution in the generator is concentrated to form a concentrated solution, which enters the solution heat exchanger, cooler, and then enters the solution tank. The excess concentrated solution is stored in the solution tank, another part enters the liquid-liquid ejector, absorber and participates in the normal absorption refrigeration cycle, and finally returns to the generator.

[0033] When the solar energy is insufficient, the unit is in the discharging state. At this time, the generator, solar collector, solution heat exchanger, air-cooled condenser and cooler no longer work. The concentrated solution stored in the solution tank continues to deliver concentrated solution through the liquid-liquid ejector, and the refrigerant stored in the refrigerant tank enters the evaporator and absorber after throttling. The dilute solution at the outlet of the absorber finally returns to the solution tank, completing the cycle process under the discharging state.

[0034] 5. The present application uses an evaporator liquid level controller group to adjust the amount of refrigerant entering the evaporator, avoiding the low evaporation efficiency caused by excessive refrigerant and high static pressure in the evaporator.

[0035] 6. The absorber of the present application is provided with a pressure controller and a liquid level controller to ensure that the pressure and liquid level of the absorber are within the normal range, so that the absorber can operate normally. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of a coupled loop heat pipe and a solution energy storage solar-driven absorption water production device constructed according to the present application, wherein the interfaces N1-N4 of the solution tank are schematically arranged for ease of drawing, and are not actually arranged. The actual arrangement is referred to Figure 2 and Figure 3 .

[0037] Figure 2 is a schematic diagram of the solution tank in Figure 1 .

[0038] Figure 3 is a schematic diagram of the solution tank in Figure 1 .

[0039] In all the drawings, the same reference numerals are used to represent the same elements or structures, wherein:

[0040] 1 - solar collector, 2 - generator, 3 - solution heat exchanger, 4 - air-cooled condenser, 5 - cooler, 6 - solution storage tank, 7 - absorber pressure controller, 8 - absorber liquid level controller, 9 - liquid-liquid ejector, 10 - absorber, 11 - refrigerant storage tank, 12 - evaporator liquid level controller set, 13 - evaporator, 14 - water pan, 15 - sensible heat exchanger, 16 - evaporator, 17 - air damper;

[0041] a - generator heat pipe condensing section, b - generator heat pipe evaporation section, c - absorber heat pipe condensing section, d - absorber heat pipe evaporation section, e - evaporator heat pipe condensing section, f - evaporator heat pipe evaporation section;

[0042] V1 - first solenoid valve, V2 - second solenoid valve, V3 - third solenoid valve, V4 - fourth solenoid valve, V5 - three-way valve, V6 - throttling valve set, V7 - valve;

[0043] P1 - solution pump. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0045] Figure 1 is a schematic diagram of a solar-driven absorption water production device coupled with a heat pipe and a solution energy storage according to the present application. As shown in Figure 1 , the device is composed of a solar absorption refrigeration unit, an energy storage unit and an air treatment unit; the solar absorption refrigeration unit includes a solar collector 1, a generator 2, a solution heat exchanger 3, an air-cooled condenser 4, a cooler 5, an absorber pressure controller 7, an absorber liquid level controller 8, a liquid-liquid ejector 9, an absorber 10, an evaporator 13, a throttling valve set V6, an evaporator liquid level controller set 12 and a solution pump P1; the air treatment water production unit includes an air filter 16, a sensible heat exchanger 15, a water pan 14 and an air damper 17 and other unit components; the absorption energy storage unit includes a solution storage tank 6, a refrigerant storage tank 11 and a plurality of solenoid valves V1, V2 and V3. There are also three groups of heat pipe circuits in the device, which are the generator heat pipe condensing section a, the generator heat pipe evaporation section b, the absorber heat pipe condensing section c, the absorber heat pipe evaporation section d, the evaporator heat pipe condensing section e and the evaporator heat pipe evaporation section f. The heat pipe circuits couple each unit, making the device compact.

[0046] When the solar energy is sufficient, the unit is in the charging state, the electromagnetic valves V1 and V3 are opened, and V2 is closed. The solar collector 1 absorbs solar radiation and transfers the heat to the generator 2 through the generator heat pipe ab. The lithium bromide dilute solution in the generator 2 is heated to boil, and the low-boiling-point water vapor is continuously evaporated. For water circulation, the high-temperature water vapor evaporated from the generator 2 top outlet enters the air-cooled condenser 4, and is cooled to liquid water under the action of the fan, and then enters the refrigerant storage tank 11. Because the solar energy is sufficient, the generated refrigerant water is sufficient to participate in the unit cycle, and the excess refrigerant water is stored in the refrigerant storage tank 11; another part enters the evaporator through the electromagnetic valve control, and the water absorbs the heat of the evaporator heat pipe condensing section e to evaporate. The water vapor after evaporation enters the absorber 10 through the upper flow channel, and is absorbed by the concentrated solution sprayed by the top spraying device of the absorber. The heat generated in the absorption process is taken to the condensing section c by the absorber heat pipe evaporation section d, and the heat is transferred to the air through the cooler 5. The lithium bromide dilute solution in the generator 2 is concentrated after generating water vapor, and the concentration is increased to form a high-temperature concentrated solution, which flows out from the bottom solution outlet of the generator 2, enters the solution heat exchanger 3, and exchanges heat with the dilute solution pumped out from the absorber 10 through the solution pump P1. The concentrated solution enters the cooler and exchanges heat with the air, and is further cooled. The cooled concentrated solution enters the solution storage tank 6.

[0047] Because the solar energy is sufficient, the energy storage unit generates excess concentrated solution, and the excess concentrated solution is stored in the solution storage tank 6; another part enters the liquid-liquid ejector 9 and mixes with the dilute solution from the absorber. The mixed solution is sprayed from the top of the absorber 10 to absorb water vapor, and the mixed liquid is sprayed by the top spraying device of the absorber 10 to absorb water vapor to become a dilute solution. The dilute solution flows out from the solution outlet end, is pumped to the three-way valve V5 by the solution pump P1, a part of the dilute solution is sent to the liquid-liquid ejector 9 to participate in the self-circulation, and the absorption efficiency is improved; another part is sent to the solution heat exchanger, and the high-temperature concentrated solution is preheated in the heat exchanger 3, and then enters the generator 2 to perform the next round of circulation. In the charging state of the energy storage unit, the liquid water in the refrigerant tank is continuously increased, the lithium bromide solution in the solution storage tank is gradually concentrated, the mass is reduced, and the solar energy is converted into the chemical potential energy of the solution and stored.

[0048] When the solar energy is insufficient, the energy storage unit is in the discharging state. Open electromagnetic valves V2 and V3, and close V1. At this time, the solar collector 1, the generator 2, the solution heat exchanger 3, the air-cooled condenser 4 and the cooler 5 all stop working. The concentrated lithium bromide solution in the solution storage tank 6 continues to enter the absorber 10 through the liquid-liquid ejector to absorb water vapor, and the dilute solution at the outlet of the absorber 10 participates in the self-circulation, and the other part enters the solution storage tank 6. The liquid water in the refrigerant storage tank 11 enters the evaporator heat pipe condensing section e after throttling, and the water evaporates after being heated to be absorbed by the concentrated solution in the absorber. When the energy storage unit is in the discharging state, the lithium bromide solution in the solution storage tank becomes dilute, and the mass increases; the liquid water in the refrigerant storage tank decreases. When the chemical potential energy stored in the energy storage unit is released, the device continues to work.

[0049] After the wet air passes through the air filter 16, it is pre-cooled in the sensible heat exchanger 15, and then enters the evaporator heat pipe evaporation section f for heat exchange. When the wet air is cooled to below the dew point temperature, the water vapor in the air condenses to produce condensed water which is stored in the water pan 14. The air cooled and dried by condensation is sent into the sensible heat exchanger 15 to exchange heat with the filtered wet air, and then the wet air is pre-cooled. Then, under the action of the fan, the wet air enters the absorber heat pipe condensing section c, the cooler 5 and the air-cooled condenser 4 in turn, and cools the three respectively, and then is discharged into the environment. The fresh water in the water pan 14 can be used externally through the valve V7.

[0050] The solution storage tank has four interfaces N1, N2, N3 and N4, as shown in the accompanying drawings. Figure 2 、 3 The N1 interface is the interface through which the dilute solution in the absorber flows to the solution storage tank when the energy storage unit is in the discharging state, and is controlled by the electromagnetic valve V2 (throttle valve); the N2 interface leads to the dilute solution at the bottom of the absorber, and can supplement the dilute solution in time when the liquid level of the absorber is insufficient, and is controlled by the electromagnetic valve V3 (throttle valve); the N3 interface is connected to the cooler, and is the interface through which the concentrated solution of the generator enters the solution storage tank; and the N4 interface leads to the absorber, and is the interface through which the concentrated solution enters the absorber, and is controlled by the electromagnetic valve V4 (throttle valve).

[0051] Compared with the common air water device using a vapor compression type refrigeration unit, the present application uses low-grade solar energy to drive, is energy-saving and environmentally friendly, uses the cooling air condensation water making method, and clean water can be formed on the metal surface of the heat exchanger, which is safe and healthy. In order to solve the problem of discontinuous and unstable solar energy, the device uses a solution energy storage method to convert solar energy into chemical potential energy of the solution. In addition, in order to avoid the heat transfer problem caused by the large size of the device, the device uses a heat pipe circuit to realize long-distance energy transmission, and the structure is more compact.

[0052] Those skilled in the art can easily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar driven absorption water production device coupled with a loop heat pipe and solution energy storage, characterized in that, The system comprises a solar absorption refrigeration unit, an energy storage unit and an air treatment water production unit, wherein: The solar absorption refrigeration unit comprises a solar collector (1), a generator (2), a solution heat exchanger (3), an air-cooled condenser (4), an absorber (10) and a water-lithium bromide working medium pair; the solar collector (1) heats the water-lithium bromide working medium pair in the generator (2) by absorbing solar radiation, evaporates water vapor, forms a lithium bromide concentrated solution, the air-cooled condenser (4) cools the water vapor to produce refrigerant water, the lithium bromide concentrated solution is pre-cooled by the solution heat exchanger (3), then cooled by a cooler (5) and then enters a solution storage tank (6); The energy storage unit comprises the solution storage tank (6) and a refrigerant storage tank (11); the refrigerant water flows into an evaporator through the refrigerant storage tank (11), is evaporated by absorbing heat from the evaporator heat pipe condensing section (e) and then enters the absorber (10); the lithium bromide concentrated solution in the solution storage tank (6) is pumped by an ejector and transported to the absorber (10) to absorb water vapor to become a dilute solution; a part of the dilute solution flows out of the absorber (10) and then re-circulates back to the absorber (10), and the other part is sent to the solution heat exchanger (3) to exchange heat with the lithium bromide concentrated solution and then re-enters the generator (2); The evaporator heat pipe condensing section (e) and the evaporator heat pipe evaporation section (f) form a set of heat pipe loop, a fan (18) drives the flow of the humid air, the evaporator heat pipe evaporation section (f) and the humid air of the air treatment water production unit are in countercurrent heat exchange, the humid air is cooled to below the dew point temperature to precipitate condensed water to realize water production; The bottom of the solution storage tank (6) is provided with four interfaces, i.e. a first interface (N1), a second interface (N2), a third interface (N3) and a fourth interface (N4); the first interface (N1) and the second interface (N2) are located on the dilute solution side of the solution storage tank (6), and the third interface (N3) and the fourth interface (N4) are located on the concentrated solution side of the solution storage tank (6); A part of the dilute solution flowing out of the absorber (10) is divided into two paths, one of which is connected to the solution heat exchanger (3) and controlled by a first electromagnetic valve (V1), and the other of which is connected to the first interface (N1) and controlled by a second electromagnetic valve (V2); The lithium bromide solution on the dilute solution side of the solution storage tank (6) flows into the absorber (10) through the second interface (N2) and is controlled by a third electromagnetic valve (V3), and the lithium bromide solution on the concentrated solution side of the solution storage tank (6) flows into the ejector through the fourth interface (N4) and is transported to the absorber (10) and controlled by a fourth electromagnetic valve (V4), for mixing with a part of the dilute solution flowing out of the absorber (10) and then re-circulating back to the absorber (10); The lithium bromide concentrated solution cooled by the solution heat exchanger (3) and the cooler (5) flows into the concentrated solution side of the solution storage tank (6) through the third interface (N3); the dilute solution of the absorber (10) in the energy release mode flows back to the dilute solution side of the solution storage tank (6) through the first interface (N1) and is controlled by the second electromagnetic valve (V2); When the solar energy is sufficient, the first electromagnetic valve (V1) is opened, and the device is in the energy storage and water production state; when the solar energy is insufficient, the first electromagnetic valve (V1) is closed, and the device is in the energy release and water production state; The energy storage unit further comprises an absorber pressure controller (7) and an absorber liquid level controller (8); The absorber pressure controller (7) is used to control the fourth electromagnetic valve (V4) to adjust the amount of lithium bromide concentrated solution entering the absorber (10); when the pressure of the absorber (10) is lower than the set value, the fourth electromagnetic valve (V4) is closed, and when the pressure of the absorber (10) is higher than the set value, the fourth electromagnetic valve (V4) is opened, and the concentrated solution is supplemented to the absorber (10); The second electromagnetic valve (V2) and the third electromagnetic valve (V3) are controlled by the absorber liquid level controller (8); when the liquid level of the absorber (10) is lower than the set value, the third electromagnetic valve (V3) is opened, the second electromagnetic valve (V2) is closed, and part of the solution in the solution storage tank (6) is supplemented to the absorber (10) through the third electromagnetic valve (V3) to increase the liquid level of the absorber (10); when the liquid level of the absorber (10) is higher than the set value, the second electromagnetic valve (V2) is opened, the third electromagnetic valve (V3) is closed, and the three-way valve (V5) adjusts the proportion of the solution flow rate to the first interface (N1) to reduce the liquid level of the absorber.

2. A solar powered absorption water production unit with coupled loop heat pipe and solution energy storage as claimed in claim 1 wherein, The solar energy absorption refrigeration unit further comprises a generator heat pipe condensing section (a) and a generator heat pipe evaporating section (b) constituting a heat pipe circulation; the solar energy collector (1) concentrates solar radiation to the generator heat pipe evaporating section (b), and the generator heat pipe condensing section (a) heats the water-lithium bromide working medium pair in the generator (2).

3. A solar powered absorption water production unit with coupled loop heat pipe and solution energy storage as claimed in claim 1 wherein, The solar energy absorption refrigeration unit further comprises an absorber heat pipe condensing section (c) and an absorber heat pipe evaporating section (d) constituting a heat pipe circulation; the absorber heat pipe evaporating section (d) is located inside the absorber (10), and the heat generated by the absorption of water vapor by the lithium bromide concentrated solution in the absorber (10) is absorbed by the absorber heat pipe evaporating section (d) and transferred to the absorber heat pipe condensing section (c), and finally the heat is transferred to the air through the absorber heat pipe condensing section (c).

4. A solar powered absorption water production unit with coupled loop heat pipe and solution energy storage as claimed in claim 1 wherein, The ejector is a liquid-liquid ejector (9), and the solar energy absorption refrigeration unit further comprises the liquid-liquid ejector (9) and a solution pump (P1); When the solar energy is sufficient, the excess lithium bromide concentrated solution is stored in the solution storage tank (6), and the remaining lithium bromide concentrated solution enters the liquid-liquid ejector (9) to mix with the dilute solution from the absorber (10) and then returns to the absorber (10) to continue to absorb water vapor, realizing self-circulation; The dilute solution flowing out of the absorber (10) is pumped to the three-way valve V5 through the solution pump (P1) and is divided into two parts, one part of the dilute solution is sent into the liquid-liquid ejector (9) to participate in the self-circulation, and the other part is sent into the solution heat exchanger (3) to exchange heat with the lithium bromide concentrated solution and then returns to the generator (2).

5. A solar powered absorption water production unit with coupled loop heat pipe and solution energy storage as claimed in claim 1 wherein, The air treatment water production unit comprises a fan (18), an air filter (16), a sensible heat exchanger (15), and a water collection tray (14). The wet air after passing through the air filter (16) is firstly pre-cooled in the sensible heat exchanger (15), and then is heat-exchanged in the evaporator heat pipe evaporation section (f), and the condensed water is separated out when the wet air is cooled to below the dew point temperature and is stored in the water pan (14); the dry air after the condensed water is separated out is sent into the sensible heat exchanger (15) to be heat-exchanged with the filtered wet air, the wet air is pre-cooled, and then sequentially passes through the absorber heat pipe condensation section (c), the cooler (5) and the air-cooled condenser (4) and takes away the heat, and finally is discharged to the environment, and the air door (17) adjusts the air volume entering the air-cooled condenser (4), the cooler (5) and the absorber heat pipe condensation section (c).

6. The solar-driven absorption water production device of claim 1, wherein the solution storage tank (6) is provided with a plurality of partitions.

7. The solar driven absorption water production unit of claim 1-5, wherein, The evaporator (13) comprises a plurality of evaporation boxes, and the refrigerant water is evaporated in a plurality of portions, and the evaporator liquid level controller group (12) is arranged to control the liquid level in the evaporation boxes to be within a specified height range.

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