Variable temperature type absorption refrigeration device driven by double heat sources

Abstract

The utility model relates to the technical field of refrigeration equipment, and provides a double-heat-source-driven variable-temperature type absorption refrigeration device which comprises a high-temperature heat exchange part and a low-temperature heat exchange part, and the high-temperature heat exchange part comprises a high-temperature generator, a high-temperature solution heat exchanger and a low-pressure absorber. The low-temperature heat exchange part comprises a low-temperature generator, a low-temperature solution heat exchanger and a high-pressure absorber, a circulating medium of the high-temperature generator and a circulating medium of the low-temperature generator are both communicated with the condenser, and a circulating medium of the condenser is communicated with the evaporation absorber. Heat sources with different temperatures are utilized through the high-temperature heat exchange part and the low-temperature heat exchange part to achieve refrigeration, and the energy utilization rate is increased. A circulating medium of the evaporation absorber is connected with the gas-liquid separator, a liquid pipeline of the gas-liquid separator is connected with the evaporator, a gas pipeline of the gas-liquid separator is connected with the high-pressure absorber, a circulating medium of the high-pressure absorber is connected with the low-temperature solution heat exchanger, and a circulating medium of the low-temperature solution heat exchanger is connected with the low-temperature generator.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a variable-temperature absorption refrigeration device driven by a dual heat source. Background Art

[0002] The significance of an absorption refrigerating machine lies in that it does not need to use refrigerants such as Freon gas restricted by use. For the refrigerant evaporated from the evaporator, the absorption refrigerating machine adopts the process of absorbing it with an absorption liquid and then discharging it, rather than mechanically compressing it with a compressor. An absorption refrigerating machine generally uses water or ammonia as the refrigerant, and an aqueous solution of lithium bromide or water as the solution. Traditional absorption refrigeration equipment is usually driven by a single heat source. For example, the absorption refrigerant with the publication number CN203249425U can only be driven by a single heat source for refrigeration. When the quality of the heat source deteriorates or changes, the refrigeration effect is affected.

[0003] Therefore, in view of the above problems, a variable-temperature absorption refrigeration device driven by a dual heat source is proposed to solve the above problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model develops a variable-temperature absorption refrigeration device driven by a dual heat source, which can be driven by the dual heat source for refrigeration.

[0005] The technical solution for the utility model to solve the technical problems is as follows: A variable-temperature absorption refrigeration device driven by a dual heat source includes a high-temperature heat exchange part and a low-temperature heat exchange part. The high-temperature heat exchange part includes a high-temperature generator, a high-temperature solution heat exchanger, and a low-pressure absorber. The low-temperature heat exchange part includes a low-temperature generator, a low-temperature solution heat exchanger, and a high-pressure absorber. The circulating media of the high-temperature generator and the low-temperature generator are both connected to the condenser, and the circulating medium of the condenser is connected to the evaporation absorber.

[0006] Refrigeration is achieved by using the high-temperature heat exchange part and the low-temperature heat exchange part to utilize heat sources at different temperatures, improving the energy utilization rate.

[0007] Preferably, the circulating medium of the evaporation absorber is connected to the gas-liquid separator, the liquid pipeline of the gas-liquid separator is connected to the evaporator, the gas pipeline of the gas-liquid separator is connected to the high-pressure absorber, the circulating medium of the high-pressure absorber is connected to the low-temperature solution heat exchanger, and the circulating medium of the low-temperature solution heat exchanger is connected to the low-temperature generator.

[0008] Preferably, the circulating medium of the evaporator is connected to the low-pressure absorber, the circulating medium of the low-pressure absorber is connected to the high-temperature solution heat exchanger, and the circulating medium of the high-temperature solution heat exchanger is connected to the high-temperature generator.

[0009] The vapor of the circulating medium generated by the high-temperature generator and the low-temperature generator enters the condenser for condensation. After condensation, the circulating medium enters the gas-liquid separator for separation. The gas phase of the circulating medium enters the high-pressure absorber, and the liquid phase of the circulating medium enters the evaporator. The circulating medium in the evaporator enters the low-pressure absorber.

[0010] Preferably, both the high-pressure absorber and the low-pressure absorber are connected to the main cooling water pipe, and the cooling water branch pipes of the high-pressure absorber and the low-pressure absorber are connected to the condenser.

[0011] The cooling water branch pipes of the high-pressure absorber and the low-pressure absorber are connected to the condenser, reducing the waste of cooling water and improving the utilization rate of water resources.

[0012] Preferably, the high-temperature solution heat exchanger includes a shell, a first heat exchange tube, a heat exchange chamber, a liquid inlet chamber, a liquid outlet chamber, a first baffle, a second baffle, a first hot liquid inlet, a first hot liquid outlet, a first liquid injection port, and a first liquid outlet. A heat exchange chamber, a liquid inlet chamber, and a liquid outlet chamber are arranged in the shell. The liquid inlet chamber and the liquid outlet chamber are located on one side of the heat exchange chamber, and the liquid inlet chamber is located above the heat exchange chamber. A plurality of first baffles and second baffles are arranged in the heat exchange chamber. The first baffles and the second baffles are arranged staggeredly. Both sides of the first baffles and the second baffles are connected to the inner wall of the heat exchange chamber. The first baffles are connected to the upper end of the heat exchange chamber, and the second baffles are connected to the lower end of the heat exchange chamber. The first heat exchange tube is in a "U" shape, and both ends of the first heat exchange tube are respectively communicated with the liquid inlet chamber and the liquid outlet chamber. The first heat exchange tube passes through the first baffles and the second baffles. The heat exchange chamber is provided with a first hot liquid inlet and a first hot liquid outlet. The liquid inlet chamber is provided with a first liquid injection port, and the liquid outlet chamber is provided with a first liquid outlet.

[0013] The high-temperature solution and the low-temperature solution conduct heat exchange in the heat exchange chamber. By staggeredly arranging a plurality of first baffles and second baffles, the circulation path of the high-temperature solution is increased, the time of the high-temperature solution in the heat exchange chamber is prolonged, and the heat exchange efficiency is improved.

[0014] Preferably, the low-temperature solution heat exchanger includes a housing, a second heat exchange tube, a support plate, an installation groove, a fixing bolt, a second hot liquid inlet, a second hot liquid outlet, a second liquid injection port, and a second liquid outlet. The second heat exchange tube is a multi-layer coiled pipe. The second heat exchange tube is located inside the housing. A multi-layer support plate is arranged inside the housing. A plurality of installation grooves are arranged on the support plate. The second heat exchange tube is located in the installation groove. The installation groove is provided with a fixing bolt to clamp the second heat exchange tube. The second heat exchange tube is connected to the second hot liquid inlet and the second hot liquid outlet. The housing is provided with a second liquid injection port and a second liquid outlet.

[0015] By arranging the support plate and the support groove to support the second heat exchange tube, the second heat exchange tube is prevented from moving. The solution with a higher temperature flows in the second heat exchange tube. Through the multi-layer coiled pipe, the flow distance of the solution in the second heat exchange tube is prolonged, and the heat exchange efficiency is improved.

[0016] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages or beneficial effects:

[0017] Refrigeration is achieved by using the high-temperature heat exchange section and the low-temperature heat exchange section to utilize heat sources at different temperatures, improving energy utilization efficiency. The circulating medium steam generated by the high-temperature generator and the low-temperature generator enters the condenser for condensation. The condensed circulating medium enters the gas-liquid separator for separation. The gas phase of the circulating medium enters the high-pressure absorber, and the liquid phase of the circulating medium enters the evaporator. The circulating medium in the evaporator enters the low-pressure absorber;

[0018] The high-temperature solution and the low-temperature solution conduct heat exchange in the heat exchange cavity. By staggeredly arranging a plurality of first baffles and second baffles, the circulation path of the high-temperature solution is increased, the time of the high-temperature solution in the heat exchange cavity is extended, and the heat exchange efficiency is improved;

[0019] The second heat exchange tube is supported by setting a support plate and a support groove to prevent the second heat exchange tube from moving. The solution with a higher temperature flows in the second heat exchange tube. Through the multi-layer coiled pipes, the flow distance of the solution in the second heat exchange tube is extended, and the heat exchange efficiency is improved. Brief Description of the Drawings

[0020] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model.

[0021] Figure 1 It is a schematic diagram of the working structure of the present utility model.

[0022] Figure 2 It is a schematic diagram of the structure of the high-temperature solution heat exchanger of the present utility model.

[0023] Figure 3 It is a schematic cross-sectional view of the high-temperature solution heat exchanger of the present utility model.

[0024] Figure 4 It is a schematic diagram of the structure of the low-temperature solution heat exchanger of the present utility model.

[0025] Figure 5 It is a schematic cross-sectional view of the low-temperature solution heat exchanger of the present utility model.

[0026] In the figure, 1 is a high-temperature generator; 2 is a high-temperature solution heat exchanger; 3 is a low-pressure absorber; 4 is a low-temperature generator; 5 is a low-temperature solution heat exchanger; 6 is a high-pressure absorber; 7 is a condenser; 8 is an evaporation absorber; 9 is a gas-liquid separator; 10 is an evaporator; 11 is a housing; 12 is a first heat exchange tube; 13 is a heat exchange cavity; 14 is a liquid inlet cavity; 15 is a liquid outlet cavity; 16 is a first baffle; 17 is a second baffle; 18 is a first hot liquid inlet; 19 is a first hot liquid outlet; 20 is a first liquid injection port; 21 is a first liquid outlet; 22 is an outer shell; 23 is a second heat exchange tube; 24 is a support plate; 25 is a mounting groove; 26 is a fixing bolt; 27 is a second hot liquid inlet; 28 is a second hot liquid outlet; 29 is a second liquid injection port; 30 is a second liquid outlet. Detailed implementation manners

[0027] In order to clearly illustrate the technical features of this solution, the present utility model will be described in detail below through specific implementation manners and in conjunction with its accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present utility model omits the description of well-known components, processing technologies and processes to avoid unnecessarily limiting the present utility model. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] As Figures 1 to 5As shown in the figure, a variable-temperature absorption refrigeration device driven by a dual heat source includes a high-temperature heat exchange part and a low-temperature heat exchange part. The high-temperature heat exchange part includes a high-temperature generator 1, a high-temperature solution heat exchanger 2, and a low-pressure absorber 3. The low-temperature heat exchange part includes a low-temperature generator 4, a low-temperature solution heat exchanger 5, and a high-pressure absorber 6. The circulating media of the high-temperature generator 1 and the low-temperature generator 4 are both connected to a condenser 7, and the circulating medium of the condenser 7 is connected to an evaporation absorber 8. Refrigeration is achieved by using the high-temperature heat exchange part and the low-temperature heat exchange part to utilize heat sources at different temperatures, improving energy utilization efficiency.

[0029] The circulating medium of the evaporation absorber 8 is connected to a gas-liquid separator 9. The liquid pipeline of the gas-liquid separator 9 is connected to an evaporator 10, and the gas pipeline of the gas-liquid separator 9 is connected to the high-pressure absorber 6. The circulating medium of the high-pressure absorber 6 is connected to the low-temperature solution heat exchanger 5, and the circulating medium of the low-temperature solution heat exchanger 5 is connected to the low-temperature generator 4.

[0030] The circulating medium of the evaporator 10 is connected to the low-pressure absorber 3. The circulating medium of the low-pressure absorber 3 is connected to the high-temperature solution heat exchanger 2, and the circulating medium of the high-temperature solution heat exchanger 2 is connected to the high-temperature generator 1. The circulating medium steam generated by the high-temperature generator 1 and the low-temperature generator 4 enters the condenser 7 for condensation. The condensed circulating medium enters the gas-liquid separator 9 for separation. The gas phase of the circulating medium enters the high-pressure absorber 6, and the liquid phase of the circulating medium enters the evaporator 10. The circulating medium of the evaporator 10 enters the low-pressure absorber 3.

[0031] Both the high-pressure absorber 6 and the low-pressure absorber 3 are connected to the main cooling water pipe. The cooling water branch pipes of the high-pressure absorber 6 and the low-pressure absorber 3 are connected to the condenser 7. The connection of the cooling water branch pipes of the high-pressure absorber 6 and the low-pressure absorber 3 to the condenser 7 reduces the waste of cooling water and improves the utilization efficiency of water resources.

[0032] High-temperature solution heat exchanger 2 The heat exchanger includes a housing 11, a first heat exchange tube 12, a heat exchange chamber 13, a liquid inlet chamber 14, a liquid outlet chamber 15, a first baffle 16, a second baffle 17, a first hot liquid inlet 18, a first hot liquid outlet 19, a first liquid injection port 20 and a first liquid outlet 21. A heat exchange chamber 13, a liquid inlet chamber 14 and a liquid outlet chamber 15 are arranged in the housing 11. The liquid inlet chamber 14 and the liquid outlet chamber 15 are located on one side of the heat exchange chamber 13, and the liquid inlet chamber 14 is located above the heat exchange chamber 13. A plurality of first baffles 16 and second baffles 17 are arranged in the heat exchange chamber 13. The first baffles 16 and the second baffles 17 are arranged in a staggered manner. Both sides of the first baffles 16 and the second baffles 17 are connected to the inner wall of the heat exchange chamber 13. The first baffles 16 are connected to the upper end of the heat exchange chamber 13, and the second baffles 17 are connected to the lower end of the heat exchange chamber 13. The first heat exchange tube 12 is in a "U" shape. The two ends of the first heat exchange tube 12 are respectively communicated with the liquid inlet chamber 14 and the liquid outlet chamber 15. The first heat exchange tube 12 passes through the first baffles 16 and the second baffles 17. The heat exchange chamber 13 is provided with a first hot liquid inlet 18 and a first hot liquid outlet 19. The liquid inlet chamber 14 is provided with a first liquid injection port 20, and the liquid outlet chamber 15 is provided with a first liquid outlet 21. The high-temperature solution and the low-temperature solution perform heat exchange in the heat exchange chamber 13. By arranging a plurality of first baffles 16 and second baffles 17 in a staggered manner, the circulation path of the high-temperature solution is increased, the time of the high-temperature solution in the heat exchange chamber 13 is extended, and the heat exchange efficiency is improved.

[0033] Low-temperature solution heat exchanger 5 includes a housing 22, a second heat exchange tube 23, a support plate 24, a mounting groove 25, a fixing bolt 26, a second hot liquid inlet 27, a second hot liquid outlet 28, a second liquid injection port 29 and a second liquid outlet 30. The second heat exchange tube 23 is a multi-layer coiled tube. The second heat exchange tube 23 is located in the housing 22. A multi-layer support plate 24 is arranged in the housing 22. A plurality of mounting grooves 25 are arranged on the support plate 24. The second heat exchange tube 23 is located in the mounting groove 25. The mounting groove 25 is provided with a fixing bolt 26 to clamp the second heat exchange tube 23. The second heat exchange tube 23 is connected to the second hot liquid inlet 27 and the second hot liquid outlet 28. The housing 22 is provided with a second liquid injection port 29 and a second liquid outlet 30. By arranging the support plate 24 and the support groove to support the second heat exchange tube 23, the second heat exchange tube 23 is prevented from moving. The solution with a higher temperature flows in the heat exchange tube. Through the multi-layer coiled tube, the flow distance of the solution in the heat exchange tube is extended, and the heat exchange efficiency is improved.

[0034] Working principle: Refrigeration is achieved by using the high-temperature heat exchange part and the low-temperature heat exchange part to utilize heat sources at different temperatures. The circulating medium steam generated by the high-temperature generator 1 and the low-temperature generator 4 enters the condenser 7 for condensation. The condensed circulating medium enters the gas-liquid separator 9 for separation. The gas phase of the circulating medium enters the high-pressure absorber 6, and the liquid phase of the circulating medium enters the evaporator 10. The circulating medium of the evaporator 10 enters the low-pressure absorber 3.

[0035] Although the specific implementation manners of the utility model have been described above in conjunction with the accompanying drawings, they are not limitations on the protection scope of the utility model. Based on the technical solutions of the utility model, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the utility model.

Claims

1. A variable-temperature absorption refrigeration device driven by a dual heat source, characterized in that: It includes a high-temperature heat exchange section and a low-temperature heat exchange section. The high-temperature heat exchange section includes a high-temperature generator (1), a high-temperature solution heat exchanger (2), and a low-pressure absorber (3). The low-temperature heat exchange section includes a low-temperature generator (4), a low-temperature solution heat exchanger (5), and a high-pressure absorber (6). The circulating media of the high-temperature generator (1) and the low-temperature generator (4) are both connected to a condenser (7), and the circulating medium of the condenser (7) is connected to an evaporation absorber (8).

2. The variable-temperature absorption refrigeration device driven by a dual heat source according to claim 1, characterized in that: The circulating medium of the evaporation absorber (8) is connected to a gas-liquid separator (9). The liquid pipeline of the gas-liquid separator (9) is connected to an evaporator (10). The gas pipeline of the gas-liquid separator (9) is connected to the high-pressure absorber (6). The circulating medium of the high-pressure absorber (6) is connected to the low-temperature solution heat exchanger (5). The circulating medium of the low-temperature solution heat exchanger (5) is connected to the low-temperature generator (4).

3. A variable-temperature absorption refrigeration device driven by a dual heat source according to claim 2, characterized in that: The circulating medium of the evaporator (10) is connected to the low-pressure absorber (3). The circulating medium of the low-pressure absorber (3) is connected to the high-temperature solution heat exchanger (2). The circulating medium of the high-temperature solution heat exchanger (2) is connected to the high-temperature generator (1).

4. A variable-temperature absorption refrigeration device driven by a dual heat source according to claim 2, characterized in that: Both the high-pressure absorber (6) and the low-pressure absorber (3) are connected to the main cooling water pipe. The cooling water branch pipes of the high-pressure absorber (6) and the low-pressure absorber (3) are connected to the condenser (7).

5. A variable-temperature absorption refrigeration device driven by a dual heat source according to claim 1, characterized in that: The heat exchanger of the high-temperature solution heat exchanger (2) includes a housing (11), a first heat exchange tube (12), a heat exchange chamber (13), a liquid inlet chamber (14), a liquid outlet chamber (15), a first baffle (16), a second baffle (17), a first hot liquid inlet (18), a first hot liquid outlet (19), a first liquid injection port (20), and a first liquid outlet (21). A heat exchange chamber (13), a liquid inlet chamber (14), and a liquid outlet chamber (15) are arranged in the housing (11). The liquid inlet chamber (14) and the liquid outlet chamber (15) are located on one side of the heat exchange chamber (13). The liquid inlet chamber (14) is located above the heat exchange chamber (13). A plurality of first baffles (16) and second baffles (17) are arranged in the heat exchange chamber (13). The first baffles (16) and the second baffles (17) are arranged in a staggered manner. Both sides of the first baffles (16) and the second baffles (17) are connected to the inner wall of the heat exchange chamber (13). The first baffles (16) are connected to the upper end of the heat exchange chamber (13). The second baffles (17) are connected to the lower end of the heat exchange chamber (13). The first heat exchange tube (12) is in a "U" shape. The two ends of the first heat exchange tube (12) are respectively connected to the liquid inlet chamber (14) and the liquid outlet chamber (15). The first heat exchange tube (12) passes through the first baffles (16) and the second baffles (17). The heat exchange chamber (13) is provided with a first hot liquid inlet (18) and a first hot liquid outlet (19). The liquid inlet chamber (14) is provided with a first liquid injection port (20). The liquid outlet chamber (15) is provided with a first liquid outlet (21).

6. A variable-temperature absorption refrigeration device driven by a dual heat source, characterized in that: The low-temperature solution heat exchanger (5) includes a housing (22), a second heat exchange tube (23), a support plate (24), an installation groove (25), a fixing bolt (26), a second hot liquid inlet (27), a second hot liquid outlet (28), a second liquid injection port (29), and a second liquid outlet (30). The second heat exchange tube (23) is a multi-layer coiled tube. The second heat exchange tube (23) is located inside the housing (22). Multiple support plates (24) are arranged inside the housing (22). Multiple installation grooves (25) are arranged on the support plate (24). The second heat exchange tube (23) is located inside the installation groove (25). The installation groove (25) is provided with a fixing bolt (26) for clamping the second heat exchange tube (23). The second heat exchange tube (23) is connected to the second hot liquid inlet (27) and the second hot liquid outlet (28). The housing (22) is provided with the second liquid injection port (29) and the second liquid outlet (30).

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