Single and double effect absorption heat pump unit

Abstract

The present invention discloses a single-effect combined absorption heat pump unit, comprising: a condenser, an evaporator and an absorber connected in sequence; a first generator; a second generator; a third generator; the second generator and the third generator are respectively connected to the condenser so that the generated refrigerant steam enters the condenser to condense and release heat; the driving heat source pipeline is configured to transport the driving heat source to the first generator and the third generator, and the steam generated by the first generator is used as the driving heat source of the second generator; the solution pipeline is connected between the absorber, the first generator, the second generator and the third generator in series, parallel or series-parallel mode; the hot water pipeline is connected between the absorber and the condenser in series, parallel or series-parallel mode; the cold water pipeline is connected to the evaporator. The single-effect combined absorption heat pump unit combines the advantages of a single-effect heat pump and a double-effect heat pump, and can achieve better energy-saving and economic benefits while obtaining a high hot water outlet temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of energy utilization, and in particular relates to a single-effect and double-effect combined absorption heat pump unit. Background Art

[0002] At present, in the traditional absorption heat pump heating system, the single-effect lithium bromide absorption heat pump system with lithium bromide as the working fluid has been rapidly developed due to its ability to provide high-parameter hot water, high energy-saving benefits and short investment recovery period. At the same time, the double-effect absorption heat pump system with lithium bromide as the working fluid, although it has more significant energy-saving benefits, has developed slowly due to the low hot water outlet temperature, and its application occasions are subject to certain restrictions. Summary of the invention

[0003] (I) Purpose of the invention

[0004] The purpose of the present invention is to provide a single-effect and double-effect combined absorption heat pump unit, which combines the advantages of a single-effect heat pump and a double-effect heat pump, and can achieve better energy-saving and economic benefits while obtaining a high hot water outlet temperature.

[0005] (II) Technical solution

[0006] To solve the above problems, the present invention provides a single-effect and double-effect combined absorption heat pump unit, comprising: a condenser, an evaporator and an absorber connected in sequence, so that the refrigerant can gradually achieve heat exchange in sequence; a first generator; a second generator; a third generator; the second generator and the third generator are respectively connected to the condenser, so that the generated refrigerant vapor enters the condenser to achieve heat exchange; a driving heat source pipeline, the driving heat source pipeline is configured to transport the driving heat source to the first generator and the third generator, and the steam generated by the first generator serves as the driving heat source of the second generator; a solution pipeline, the solution pipeline is connected in series, parallel or series-parallel between the absorber, the first generator, the second generator and the third generator; the hot water pipeline is connected in series, parallel or series-parallel between the absorber and the condenser; the cold water pipeline is connected to the evaporator.

[0007] Optionally, the condenser includes a second condenser and a first condenser; the third generator is connected to the second condenser, and the second generator is connected to the first condenser; the second condenser, the first condenser and the evaporator are connected in sequence so that the refrigerant water converges at the first condenser and enters the evaporator to absorb heat and evaporate; or, the second condenser and the first condenser are respectively connected to the evaporator so that the refrigerant water both enters the evaporator to absorb heat and evaporate.

[0008] Optionally, the hot water pipeline is connected to the absorber, the first condenser and the second condenser in sequence; the hot water in the hot water pipeline flows through the absorber, the first condenser and the second condenser in sequence, and is heated step by step and then output.

[0009] Optionally, the hot water pipeline is connected to the absorber, and the hot water pipeline is divided into two branches after being output through the absorber, one branch is connected to the first condenser, and the other branch is connected to the second condenser, and the two branches are output after merging; the hot water in the hot water pipeline is divided into two paths after flowing through the absorber, one branch flows through the first condenser, and the other branch flows through the second condenser, and the two branches of hot water are output after merging.

[0010] Optionally, the solution pipeline output by the absorber is divided into three branches, wherein the first branch is connected to the second generator, the second branch is connected to the third generator, and the third branch is connected to the first generator, and the three branches merge into the absorber; the solution output by the absorber is divided into three branches, wherein the first branch flows through the second generator, the second branch flows through the third generator, and the third branch flows through the first generator, and the solutions of the three branches merge into the absorber.

[0011] Optionally, the solution pipeline output by the absorber is divided into two branches, one of which is connected to the second generator and the first generator in sequence, and the other branch is connected to the third generator, and the two branches merge into one and enter the absorber; the solution output by the absorber is divided into two branches, one of which flows through the second generator and the first generator in sequence, and the other branch flows through the third generator, and the solutions of the two branches merge into one and enter the absorber.

[0012] Optionally, the solution pipeline output by the absorber is connected to the second generator, and the solution pipeline output by the second generator is divided into two branches, one of which is connected to the third generator, and the other is connected to the first generator, and the two branches merge into the absorber; the solution output by the absorber flows through the second generator, and the solution output by the second generator is divided into two branches, one of which flows through the third generator, and the other flows through the first generator, and the solutions of the two branches merge into the absorber.

[0013] Optionally, the single-effect and double-effect combined absorption heat pump unit further includes a solution heat exchanger, which is single or multiple, and the solution heat exchanger is connected between any two of the absorber, the second generator, the first generator and the third generator.

[0014] Optionally, the first generator, the second generator, the third generator, the second condenser, the first condenser, the absorber, and the evaporator are all set to single-stage or multi-stage; the second generator corresponds one-to-one to the first condenser; the first generator and the second generator can be one-to-one or one-to-many; the third generator corresponds one-to-one to the second condenser; the absorber corresponds one-to-one to the evaporator.

[0015] Optionally, the driving heat source is high-pressure steam, high-temperature hot water, fuel gas or high-temperature flue gas; and the cold water is heat source water or exhaust steam.

[0016] Optionally, the driving heat source pipeline includes a first driving heat source pipeline and a second driving heat source pipeline, and the first driving heat source pipeline and the second driving heat source pipeline are configured to be able to transport two independent driving heat sources with different parameters or different types, the first driving heat source pipeline is connected to one of the first generator and the third generator, and the second driving heat source pipeline is connected to the other of the first generator and the third generator; or, the driving heat source pipeline is connected between the first generator and the third generator in series, parallel or series-parallel.

[0017] (III) Beneficial effects

[0018] The above technical solution of the present invention has the following beneficial technical effects:

[0019] 1. In the embodiment of the present invention, the solution flowing out of the absorber can flow through the first generator, the second generator and the third generator and then enter the absorber, so that a solution circulation route can be formed. In this way, hot water flows through the absorber to absorb heat and heat up, and then enters the condenser to absorb heat, and is supplied to heat users after being heated step by step. Therefore, the absorption heat pump unit combines the advantages of single-effect heat pumps and double-effect heat pumps by combining single and double effects, and can achieve better energy-saving and economic benefits while obtaining a high hot water outlet temperature.

[0020] 2. In the embodiment of the present invention, hot water is heated by the absorber, the first condenser and the second condenser and then output. Since it can be finally output through the second condenser, it has the advantages of a single-effect absorption heat pump, the outlet temperature of the hot water can be higher, and energy can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a single-effect and double-effect combined absorption heat pump unit according to an optional embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a single-effect and double-effect combined absorption heat pump unit according to another optional embodiment of the present invention;

[0023] Figure 3This is a structural schematic diagram of a single-effect and double-effect combined absorption heat pump unit according to another optional embodiment of the present invention;

[0024] Reference numerals:

[0025] 1-first generator; 2-second generator: 3-third generator; 4-absorber; 5-evaporator; 6-condenser; 7-solution heat exchanger; 8-driving heat source pipeline; 9-hot water pipeline; 10-cold water pipeline;

[0026] 71 - double-effect high-temperature solution heat exchanger; 72 - double-effect low-temperature solution heat exchanger; 73 - single-effect solution heat exchanger; 81 - first driving heat source pipeline; 82 - second driving heat source pipeline. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0028] In an embodiment of the present invention, a single-effect and double-effect combined absorption heat pump unit is provided, comprising: a condenser 6, an evaporator 5, an absorber 4, a first generator 1, a second generator 2, a third generator 3, a driving heat source pipeline 8, a solution pipeline, a hot water pipeline 9 and a cold water pipeline 10. The condenser 6, the evaporator 5 and the absorber 4 are connected in sequence so that the refrigerant can gradually achieve heat exchange in sequence. The condensed water in the condenser 6 enters the evaporator 5 to absorb heat and become refrigerant vapor, and then enters the absorber 4. The first generator 1; the second generator 2; the third generator 3; the second generator 2 and the third generator 3 are respectively connected to the condenser 6 so that the generated refrigerant vapor enters the condenser 6 to achieve heat exchange. A driving heat source pipeline 8, wherein the driving heat source pipeline 8 is connected between the first generator 1 and the third generator 3, and the steam generated by the first generator 1 serves as the driving heat source of the second generator 2; a solution pipeline, wherein the solution pipeline is connected between the absorber 4, the first generator 1, the second generator 2 and the third generator 3 in a series, parallel or series-parallel manner; the hot water pipeline 9 is connected between the absorber 4 and the condenser 6 in a series, parallel or series-parallel manner; and the cold water pipeline 10 is connected to the evaporator 5. Cold water flows through the evaporator 5 through the cold water pipeline 10 to recycle the waste heat; the concentrated solution absorbs the refrigerant vapor from the evaporator 5 in the absorber 4 to form a dilute solution. After the dilute solution flows out of the absorber 4, it can flow through the first generator 1, the second generator 2 and the third generator 3 through the solution pipeline and then enter the absorber 4, forming a solution circulation route, so that hot water flows through the absorber 4 to absorb heat and heat up; hot water can enter the absorber 4 and the condenser 6 through the hot water pipeline 9 to absorb heat, and is supplied to heat users after being heated step by step; since the second generator 2 and the third generator 3 are respectively connected to the condenser 6, the hot water is finally output from the condenser 6, which has the advantages of a single-effect absorption heat pump, and the outlet temperature of the hot water can be higher, even up to 90°C. The driving heat source pipeline 8 is connected between the first generator 1 and the third generator 3. The steam generated by the first generator 1 is used as the driving heat source of the second generator 2. Therefore, the heating performance coefficient of the absorption heat pump unit can be improved. The driving heat source required for heat production is less than that of a single-effect absorption heat pump. Therefore, the absorption heat pump unit combines the advantages of a single-effect heat pump and a double-effect heat pump through a combination of single and double effects. While obtaining a high hot water outlet temperature, it can achieve better energy-saving and economic benefits.

[0029] In some embodiments, the condenser 6 includes a second condenser 62 and a first condenser 61; the third generator 3 is connected to the second condenser 62; the second generator 2 and the first condenser 61 are connected; the second condenser 62, the first condenser 61 and the evaporator 5 are connected in sequence, so that the refrigerant water converges at the first condenser 61 and enters the evaporator 5 to absorb heat and evaporate; or, the second condenser 62 and the first condenser 61 are respectively connected to the evaporator 5, so that the refrigerant water enters the evaporator 5 to absorb heat and evaporate. The refrigerant vapor generated in the third generator 3 enters the second condenser 62 for heat exchange to become refrigerant water and flows into the first condenser 61; or, the refrigerant water in the second condenser 62 can directly enter the evaporator 5 for heat exchange to become refrigerant vapor; the refrigerant vapor generated by the second generator 2 enters the first condenser 61 for heat exchange to become refrigerant water, and then enters the evaporator 5 for heat exchange to become refrigerant vapor. The refrigerant water entering the evaporator 5 can absorb the waste heat of the cold water in the evaporator 5. The cold water can be set as heat source water or exhaust steam, so that the waste heat of the heat source water or exhaust steam can be effectively utilized.

[0030] In some embodiments, the hot water pipeline 9 is connected to the absorber 4, the first condenser 61 and the second condenser 62 in sequence; the hot water in the hot water pipeline 9 flows through the absorber 4, the first condenser 61 and the second condenser 62 in sequence, and is heated step by step before being output. The hot water is heated in sequence by the absorber 4, the first condenser 61 and the second condenser 62 and then output. Since it is finally output through the second condenser 62, it has the advantages of a single-effect absorption heat pump, and the outlet temperature of the hot water can be higher, even up to 90°C.

[0031] In some embodiments, the hot water pipeline 9 is connected to the absorber 4, and the hot water pipeline 9 is divided into two branches after being output from the absorber 4, one of which is connected to the first condenser 61, and the other is connected to the second condenser 62, and the two branches are output after merging; the hot water in the hot water pipeline 9 is divided into two paths after flowing through the absorber 4, one of which flows through the first condenser 61, and the other flows through the second condenser 62, and the two paths of hot water are output after merging. The hot water finally flows through the first condenser 61 and the second condenser 62 and then merges and is output, and the outlet temperature of the hot water after heating can be higher, which can save energy.

[0032] In some embodiments, the solution pipeline output by the absorber 4 is divided into three branches, wherein the first branch is connected to the second generator 2, the second branch is connected to the third generator 3, and the third branch is connected to the first generator 1, and the three branches merge into the absorber 4; the solution output by the absorber 4 is divided into three branches, wherein the first branch flows through the second generator 2, the second branch flows through the third generator 3, and the third branch flows through the first generator 1, and the solutions of the three branches merge into the absorber 4.

[0033] In some embodiments, the solution pipeline output by the absorber 4 is divided into two branches, one of which is connected to the second generator 2 and the first generator 1 in sequence, and the other is connected to the third generator 3, and the two branches merge and enter the absorber 4; the solution output by the absorber 4 is divided into two branches, one of which flows through the second generator 2 and the first generator 1 in sequence, and the other flows through the third generator 3, and the solutions of the two branches merge and enter the absorber 4.

[0034] In some embodiments, the solution pipeline output by the absorber 4 is connected to the second generator 2, and the solution pipeline output by the second generator 2 is divided into two branches, one of which is connected to the third generator 3, and the other is connected to the first generator 1, and the two branches merge into the absorber 4; the solution output by the absorber 4 flows through the second generator 2, and the solution output by the second generator 2 is divided into two branches, one of which flows through the third generator 3, and the other flows through the first generator 1, and the solutions of the two branches merge into the absorber 4.

[0035] In some embodiments, the single-effect and double-effect combined absorption heat pump unit further includes a solution heat exchanger 7, wherein the solution heat exchanger 7 is single or multiple, and the solution heat exchanger 7 is connected between the absorber 4 and the second generator 2, and the solution heat exchanger can be set as a double-effect low-temperature solution heat exchanger 72; and / or, the solution heat exchanger 7 is connected between the absorber 4 and the third generator 3, and the solution heat exchanger can be set as a single-effect solution heat exchanger 73; and / or, the solution heat exchanger 7 is connected between the absorber 4 and the third generator 3, and the solution heat exchanger can be set as a single-effect solution heat exchanger 73. Between the first generator 1 and the second generator 2, the solution heat exchanger can be set as a double-effect high-temperature solution heat exchanger 71; and / or, the solution heat exchanger 7 is connected between the second generator 2 and the first generator 1, and the solution heat exchanger can be set as a double-effect high-temperature solution heat exchanger 71; and / or, the solution heat exchanger 7 can be connected between the second generator 2 and the third generator 3, and the solution heat exchanger can be set as a double-effect high-temperature solution heat exchanger 71; and / or, the solution heat exchanger 7 can be connected between the first generator 1 and the third generator 3.

[0036] In some embodiments, the first generator 1, the second generator 2, the third generator 3, the second condenser 62, the first condenser 61, the absorber 4, and the evaporator 5 are all set to single stage or multi-stage; the second generator 2 corresponds one-to-one to the first condenser 61; the first generator 1 and the second generator 2 can be one-to-one or one-to-many; the third generator 3 corresponds one-to-one to the second condenser 62; the absorber 4 corresponds one-to-one to the evaporator 5.

[0037] In some embodiments, the driving heat source is high-pressure steam, high-temperature hot water, fuel gas or high-temperature flue gas; and the cold water is heat source water or exhaust steam.

[0038] In some embodiments, the driving heat source pipeline 8 includes a first driving heat source pipeline 81 and a second driving heat source pipeline 82, and the first driving heat source pipeline 81 and the second driving heat source pipeline 82 are configured to be able to transport two independent driving heat sources with different parameters or different types, the first driving heat source pipeline 81 is connected to one of the first generator 1 and the third generator 3, and the second driving heat source pipeline 82 is connected to the other of the first generator 1 and the third generator 3; or, the driving heat source pipeline 8 is connected between the first generator 1 and the third generator 3 in series, parallel or series-parallel.

[0039] like Figure 1As shown, in an optional embodiment of the present invention, a single-effect and double-effect combined absorption heat pump unit is provided, comprising: a first generator 1, a second generator 2, a third generator 3, an absorber 4, an evaporator 5, a condenser 6, a solution heat exchanger 7, a driving heat source pipeline 8, a hot water pipeline 9, and a cold water pipeline 10. The driving heat source enters the first generator 1 and the third generator 3 in parallel through the driving heat source pipeline 8, and serves as the driving heat source of both; the steam generated by the first generator 1 serves as the driving heat source of the second generator 2; the refrigerant steam generated by the second generator 2 enters the first condenser 61 to condense and release heat, and heats the hot water; the refrigerant steam generated by the third generator 3 enters the second condenser 62 to condense and release heat, and further heats the hot water; the refrigerant water formed in the second condenser 62 enters the first condenser 61, and after merging with the refrigerant water generated in the first condenser 61, enters the evaporator 5 together to absorb heat and evaporate, forming refrigerant steam; the refrigerant steam generated in the evaporator 5 enters the absorber 4, and is absorbed by the concentrated solution in the absorber 4. Hot water enters the absorber 4, the first condenser 61 and the second condenser 62 in sequence through the hot water pipeline 9, and is supplied to the heat users after being heated step by step; cold water flows through the evaporator 5 through the cold water pipeline 10 to recycle the waste heat; the concentrated solution absorbs the refrigerant vapor from the evaporator 5 in the absorber 4 to form a dilute solution, and after the dilute solution flows out of the absorber 4, it is divided into three paths and enters the double-effect high-temperature solution heat exchanger 71, the double-effect low-temperature solution heat exchanger 72 and the single-effect solution heat exchanger 73 respectively, among which one path of the dilute solution entering the double-effect high-temperature solution heat exchanger 71 enters the first generator 1 for spraying after being heated, one path of the dilute solution entering the double-effect low-temperature solution heat exchanger 72 enters the second generator 2 for spraying after being heated, and one path of the dilute solution entering the single-effect solution heat exchanger 73 enters the After being heated, it enters the third generator 3 for spraying; the concentrated solution formed in the first generator 1 enters the double-effect high-temperature solution heat exchanger 71, and is used as a dilute solution on the high-temperature side and the low-temperature side for heat exchange and cooling; the concentrated solution formed in the second generator 2 enters the double-effect low-temperature solution heat exchanger 72, and is used as a dilute solution on the high-temperature side and the low-temperature side for heat exchange and cooling; the concentrated solution formed in the third generator 3 enters the single-effect solution heat exchanger 73, and is used as a dilute solution on the high-temperature side and the low-temperature side for heat exchange and cooling; the three concentrated solutions cooled in the double-effect high-temperature solution heat exchanger 71, the double-effect low-temperature solution heat exchanger 72, and the single-effect solution heat exchanger 73 merge into one, and enter the absorber 4 together to absorb and release heat, heating the hot water while forming a dilute solution, thereby forming a closed-loop circulation circuit of the solution.

[0040] like Figure 2As shown, in another optional embodiment of the present invention, a single-effect and double-effect combined absorption heat pump unit is provided, comprising: a first generator 1, a second generator 2, a third generator 3, an absorber 4, an evaporator 5, a condenser 6, a solution heat exchanger 7, a driving heat source pipeline 8, a hot water pipeline 9, and a cold water pipeline 10; the driving heat source enters the first generator 1 and the third generator 3 in parallel through the driving heat source pipeline 8, and serves as the driving heat source for both; the steam generated by the first generator 1 serves as the driving heat source for the second generator 2; the refrigerant steam generated by the second generator 2 enters the first condenser 61 to condense and release heat, and heats the hot water; the refrigerant steam generated by the third generator 3 enters the second condenser 61 to condense and release heat, and heats the hot water; The refrigerant water formed in the second condenser 62 enters the first condenser 61, and after merging with the refrigerant water generated in the first condenser 61, enters the evaporator 5 together to absorb heat and evaporate to form refrigerant steam; the refrigerant steam generated in the evaporator 5 enters the absorber 4, and is absorbed by the concentrated solution in the absorber 4; the hot water first enters the absorber 4 through the hot water pipeline 9, and after being heated in the absorber 4, it is divided into two parallel paths and enters the first condenser 61 and the second condenser 62. The hot water that has been heated again in the first condenser 61 and the second condenser 62 is reunited into one path and output together to supply heat users; the cold water flows through the evaporator through the cold water pipeline 10 5, to recycle the waste heat; the concentrated solution absorbs the refrigerant vapor from the evaporator 5 in the absorber 4 to form a dilute solution. After the dilute solution flows out of the absorber 4, it is divided into two paths and enters the double-effect low-temperature solution heat exchanger 72 and the single-effect solution heat exchanger 73 respectively. Among them, the dilute solution entering the single-effect solution heat exchanger 73 is heated and then enters the third generator 3 for spraying to form a concentrated solution; the dilute solution entering the double-effect low-temperature solution heat exchanger 72 is heated and then enters the second generator 2 for spraying to form an intermediate concentrated solution; the intermediate concentrated solution formed in the second generator 2 enters the double-effect high-temperature solution heat exchanger 71, and after further heating, enters the first generator Spraying occurs in the generator 1 to form a concentrated solution; after the concentrated solution formed in the first generator 1 flows out, it enters the double-effect high-temperature solution heat exchanger 71 and the double-effect low-temperature solution heat exchanger 72 in sequence, and is used as the high-temperature side to exchange heat and cool down with the intermediate concentrated solution and the dilute solution on its low-temperature side in sequence; the concentrated solution formed in the third generator 3 enters the single-effect solution heat exchanger 73, and is used as the dilute solution on the high-temperature side and the low-temperature side to exchange heat and cool down; the two concentrated solutions cooled in the double-effect low-temperature solution heat exchanger 72 and the single-effect solution heat exchanger 73 merge into one, and enter the absorber 4 together to absorb and release heat, and form a dilute solution while heating the hot water, thereby forming a closed-loop circulation circuit of the solution.

[0041] like Figure 3As shown, in another optional embodiment of the present invention, a single-effect and double-effect combined absorption heat pump unit is provided, comprising: a first generator 1, a second generator 2, a third generator 3, an absorber 4, an evaporator 5, a condenser 6, a solution heat exchanger 7, a driving heat source pipeline 8, a hot water pipeline 9, and a cold water pipeline 10; the driving heat source pipeline 8 comprises a first driving heat source pipeline 81 and a second driving heat source pipeline 82, one driving heat source enters the first generator 1 through the first driving heat source pipeline 81, and serves as the driving heat source of the first generator 1, and the other driving heat source enters the third generator 3 through the second driving heat source pipeline 82, and serves as The driving heat source of the third generator 3 is two independent heat sources with different parameters or different types; the steam generated by the first generator 1 is used as the driving heat source of the second generator 2; the steam generated by the second generator 2 enters the first condenser 61 to condense and release heat, heating the hot water; the steam generated by the third generator 3 enters the second condenser 62 to condense and release heat, further heating the hot water; the refrigerant water formed in the second condenser 62 enters the first condenser 61, and after merging with the refrigerant water generated in the first condenser 61, they enter the evaporator 5 together to absorb heat and evaporate to form refrigerant steam; the refrigerant steam generated in the evaporator 5 enters the absorption 4, and is absorbed by the concentrated solution in the absorber 4; the hot water enters the absorber 4, the first condenser 61 and the second condenser 62 in sequence through the hot water pipeline 9, and is supplied to the heat user after being heated step by step; the cold water flows through the evaporator 5 through the cold water pipeline 10 to recycle the waste heat; the concentrated solution absorbs the refrigerant vapor from the evaporator 5 in the absorber 4 to form a dilute solution, and after the dilute solution flows out of the absorber 4, it enters the low-temperature solution heat exchanger 72, and after being heated, it enters the second generator 2 for spraying and generating, forming an intermediate concentrated solution; the intermediate concentrated solution coming out of the second generator 2 enters the high-temperature solution heat exchanger 71 to be heated again; after being heated again After the intermediate concentrated solution comes out of the high-temperature solution heat exchanger 71, it is divided into two paths: one path enters the first generator 1 for spraying and generating to form a concentrated solution; the other path enters the third generator 3 for spraying and generating to form a concentrated solution; the two paths of concentrated solutions merge into one path after coming out of the first generator 1 and the third generator 3, and enter the high-temperature solution heat exchanger 71 and the low-temperature solution heat exchanger 72 in sequence, as the high-temperature side, to exchange heat and cool down with the intermediate concentrated solution and the dilute solution on its low-temperature side in sequence. After two coolings, the concentrated solution enters the absorber 4 to absorb and release heat, heating the hot water while forming a dilute solution, thereby forming a solution closed-loop circulation circuit.

[0042] The single-effect and double-effect combined absorption heat pump unit provided in the embodiment of the present invention is not limited to Figure 1-Figure 3In the optional embodiment shown, the first generator 1, the second generator 2, the third generator 3, the absorber 4, the evaporator 5, the first condenser 61, the second condenser 62, the solution heat exchanger 7, etc. can all be set to single-stage or multi-stage; the second generator 2 corresponds to the first condenser 61 one-to-one; the first generator 1 and the second generator 2 can be one-to-one or one-to-many; the third generator 3 corresponds to the second condenser 62 one-to-one; the absorber 4 corresponds to the evaporator 5 one-to-one; by driving the heat source pipeline, the hot water pipeline, and the cold water pipeline to connect them in series, parallel, or series-parallel, the advantages of single- and double-effect heat pumps can be combined, and while obtaining a high hot water outlet temperature, better energy-saving and economic benefits can be achieved.

[0043] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A single-effect and double-effect combined absorption heat pump unit, characterized in that: include: A condenser (6), an evaporator (5) and an absorber (4) connected in sequence; A first generator (1); a second generator (2); a third generator (3); The second generator (2) and the third generator (3) are respectively connected to the condenser (6) so that the generated refrigerant vapor enters the condenser (6) to condense and release heat; a driving heat source pipeline (8), wherein the driving heat source pipeline (8) is configured to transport the driving heat source to the first generator (1) and the third generator (3), wherein the steam generated by the first generator (1) serves as the driving heat source of the second generator (2); A solution pipeline, wherein the solution pipeline is connected between the absorber (4), the first generator (1), the second generator (2) and the third generator (3) in a series, parallel or series-parallel manner; A hot water pipeline (9), wherein the hot water pipeline (9) is connected between the absorber (4) and the condenser (6) in a series, parallel or series-parallel manner; A cold water pipeline (10), the cold water pipeline (10) being in communication with the evaporator (5); The condenser (6) comprises a first condenser (61) and a second condenser (62); The third generator (3) is in communication with the second condenser (62); The second generator (2) is in communication with the first condenser (61); The second condenser (62), the first condenser (61) and the evaporator (5) are connected in sequence, so that the refrigerant water converges at the first condenser (61) and enters the evaporator (5) to absorb heat and evaporate; or, The second condenser (62) and the first condenser (61) are respectively connected to the evaporator (5), so that the refrigerant water enters the evaporator (5) to absorb heat and evaporate; The hot water pipeline (9) is sequentially connected to the absorber (4), the first condenser (61) and the second condenser (62); The hot water in the hot water pipeline (9) flows through the absorber (4), the first condenser (61) and the second condenser (62) in sequence, and is heated step by step before being output; The solution pipeline outputted from the absorber (4) is divided into three branch pipelines, wherein the first branch pipeline is connected to the second generator (2), the second branch pipeline is connected to the third generator (3), and the third branch pipeline is connected to the first generator (1), and the three branch pipelines merge and enter the absorber (4); The solution output from the absorber (4) is divided into three branches, wherein the first branch flows through the second generator (2), the second branch flows through the third generator (3), and the third branch flows through the first generator (1). The solutions of the three branches merge and enter the absorber (4).

2. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The hot water pipeline (9) is in communication with the absorber (4), and the hot water pipeline (9) is divided into two branches after being output from the absorber (4), one branch being in communication with the first condenser (61), and the other branch being in communication with the second condenser (62), and the two branches are output after being merged; The hot water in the hot water pipeline (9) flows through the absorber (4) and is divided into two paths, one of which flows through the first condenser (61) and the other flows through the second condenser (62). The two paths of hot water are combined and then output.

3. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The solution pipeline outputted from the absorber (4) is divided into two branch pipelines, one of which is connected to the second generator (2) and the first generator (1) in sequence, and the other branch pipeline is connected to the third generator (3), and the two branch pipelines merge and enter the absorber (4); The solution output from the absorber (4) is divided into two branches, one of which flows through the second generator (2) and the first generator (1) in sequence, and the other flows through the third generator (3), and the solutions of the two branches merge and enter the absorber (4).

4. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The solution pipeline outputted from the absorber (4) is connected to the second generator (2), and the solution pipeline outputted from the second generator (2) is divided into two branch pipelines, one of which is connected to the third generator (3), and the other branch pipeline is connected to the first generator (1), and the two branch pipelines merge and enter the absorber (4); The solution output from the absorber (4) flows through the second generator (2), and the solution output from the second generator (2) is divided into two branches, one of which flows through the third generator (3) and the other flows through the first generator (1). The solutions of the two branches merge and enter the absorber (4).

5. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: It also includes a solution heat exchanger (7), which is single or multiple, and is connected between each of the absorber (4), the second generator (2), the first generator (1) and the third generator (3).

6. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The first generator (1), the second generator (2), the third generator (3), the second condenser (62), the first condenser (61), the absorber (4), and the evaporator (5) are all configured as single-stage or multi-stage; The second generator (2) corresponds to the first condenser (61) in a one-to-one manner; The first generator (1) and the second generator (2) may be one-to-one or one-to-many; The third generator (3) corresponds to the second condenser (62) in a one-to-one manner; The absorber (4) corresponds to the evaporator (5) in one-to-one correspondence.

7. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The driving heat source is high-pressure steam, high-temperature hot water, gas or high-temperature flue gas; The cold water is heat source water or exhaust steam.

8. The single-effect and double-effect combined absorption heat pump unit according to claim 1, characterized in that: The driving heat source pipeline (8) comprises a first driving heat source pipeline (81) and a second driving heat source pipeline (82), wherein the first driving heat source pipeline (81) and the second driving heat source pipeline (82) are configured to be able to transport two independent driving heat sources with different parameters or different types, wherein the first driving heat source pipeline (81) is connected to one of the first generator (1) and the third generator (3), and the second driving heat source pipeline (82) is connected to the other of the first generator (1) and the third generator (3); or, The driving heat source pipeline (8) is connected between the first generator (1) and the third generator (3) in a series, parallel or series-parallel manner.

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