Heat pump hot water unit with waste heat recycling function

Abstract

The utility model provides a heat pump hot water unit with a waste heat recycling function, and relates to the field of heat pump hot water units, the heat pump hot water unit with the waste heat recycling function comprises a heat pump, a bottom heat exchange box, a top heat exchange box and a plurality of middle heat exchange boxes, s-shaped bent heat exchange pipes are installed on the inner sides of the bottom heat exchange box, the top heat exchange box and the multiple middle heat exchange boxes, the end of the input pipe is connected with the input ends of the heat exchange pipes in the bottom heat exchange box, and the output ends of the heat exchange pipes in the bottom heat exchange box are connected with the input ends of the heat exchange pipes in the middle heat exchange boxes. The input ends and the output ends of the heat exchange pipes of the multiple middle heat exchange boxes are sequentially connected, the heat exchange pipes in the top heat exchange box are connected with the output ends of the heat exchange pipes in the adjacent middle heat exchange boxes, and the output ends of the heat exchange pipes in the top heat exchange box communicate with the input end of a heat pump. The medium at the output end of the heat pump is subjected to heat exchange, so that waste of a heat source is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat pump water heaters, and in particular to a heat pump water heater with waste heat recovery and utilization. Background Technology

[0002] A heat pump is a highly efficient and energy-saving device that fully utilizes low-grade heat energy. Heat can spontaneously transfer from a high-temperature object to a low-temperature object, but not spontaneously in the opposite direction. The working principle of a heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation manner. It consumes only a small amount of net reverse circulation work to obtain a large amount of heat supply, effectively utilizing low-grade heat energy that is difficult to apply, thus achieving energy-saving goals.

[0003] In a heat pump, the refrigerant is compressed by the compressor and then enters the condenser. Here, the high-temperature, high-pressure gaseous refrigerant releases heat to the space or medium that needs to be heated (such as water). Since the output end of the heat pump is directly connected to the input end, the output medium is directly cooled, resulting in some heat energy being wasted.

[0004] Therefore, it is necessary to provide a new heat pump water heater unit with waste heat recovery and utilization to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a heat pump water heater unit with waste heat recovery and utilization.

[0006] The heat pump water heater unit with waste heat recovery and utilization provided by this utility model includes a heat pump, a bottom heat exchange box, a top heat exchange box, and multiple intermediate heat exchange boxes. The output end of the heat pump is fixedly connected to an input pipe. The bottom heat exchange box, the top heat exchange box, and the multiple intermediate heat exchange boxes are all equipped with S-shaped heat exchange tubes. The end of the input pipe is connected to the input end of the heat exchange tube in the bottom heat exchange box. The output end of the heat exchange tube in the bottom heat exchange box is connected to the input end of the heat exchange tube in the intermediate heat exchange box. The input and output ends of the heat exchange tubes in the multiple intermediate heat exchange boxes are connected in sequence. The heat exchange tube in the top heat exchange box is connected to the output end of the heat exchange tube in the adjacent intermediate heat exchange box. The output end of the heat exchange tube in the top heat exchange box is connected to the input end of the heat pump. One side of the bottom heat exchange box, the top heat exchange box, and the multiple intermediate heat exchange boxes is connected to a water inlet device. The other side of the bottom heat exchange box, the top heat exchange box, and the multiple intermediate heat exchange boxes is connected to a water outlet device.

[0007] Preferably, the water inlet device includes a main water inlet pipe, a vertical water inlet pipe, a water inlet valve, and multiple branch pipes. The main water inlet pipe is equipped with a water inlet valve. One end of the main water inlet pipe is fixedly connected to the output end of the first water pump. One end of the main water inlet pipe is equipped with a vertical water inlet pipe that is closed at both ends. One end of each of the multiple branch pipes is fixedly connected to the vertical water inlet pipe, and the other end of each of the multiple branch pipes is fixedly connected to the inner cavity of the bottom heat exchange box, the top heat exchange box, and multiple intermediate heat exchange boxes, respectively.

[0008] Preferably, the water outlet device includes a main water outlet pipe, a vertical water outlet pipe, a water outlet valve, and multiple manifolds. The multiple manifolds are respectively fixedly connected to the inner cavities of the bottom heat exchange box, the top heat exchange box, and multiple intermediate heat exchange boxes. One end of the multiple manifolds is fixedly connected to the vertical water outlet pipe. One end of the vertical water outlet pipe is fixedly connected to the main water outlet pipe. The water outlet valve is installed on the main water outlet pipe. The other end of the main water outlet pipe is connected to the input end of the second water pump.

[0009] Preferably, a heat insulation device is connected between the output end of the heat exchange tube in the top heat exchange box and the input end of the heat pump, and the heat insulation device is arranged around the bottom heat exchange box, the top heat exchange box and multiple intermediate heat exchange boxes.

[0010] Preferably, the insulation device includes a top insulation frame, a bottom insulation frame, and multiple intermediate insulation frames. The top insulation frame, bottom insulation frame, and multiple intermediate insulation frames are fitted outside the top heat exchange box, bottom heat exchange box, and multiple intermediate heat exchange box. The top insulation frame, bottom insulation frame, and multiple intermediate insulation frames are all hollow structures. Each of the top insulation frame, bottom insulation frame, and multiple intermediate insulation frames is provided with a partition plate. The output end of the heat exchange tube in the top heat exchange box is connected to one end of the inner cavity of the top insulation frame. The other end of the inner cavity of the top insulation frame is connected to one end of the adjacent intermediate insulation frame through a bent pipe. The two ends of the multiple intermediate insulation frames are connected sequentially through multiple bent pipes. One end of the inner cavity of the bottom insulation frame is connected to the bent pipe on the adjacent intermediate insulation frame. The other end of the inner cavity of the bottom insulation frame is connected to the input end of the heat pump through an output pipe.

[0011] Preferably, the input pipe passes through the bottom insulation frame.

[0012] Compared with related technologies, the heat pump water heater unit with waste heat recovery and utilization provided by this utility model has the following beneficial effects:

[0013] The medium at the heat pump output end enters the input pipe and flows to the heat exchange tubes of the bottom heat exchange box to achieve heat exchange. Then, the medium flows sequentially along the heat exchange tubes of multiple intermediate heat exchange boxes and finally enters the heat exchange tubes of the bottom heat exchange box. In this way, the medium at the heat pump output end can be used for water heating, which reduces the waste of heat source to a certain extent.

[0014] After heat exchange is completed, the medium enters the top insulation frame, flows from one end of the top insulation frame to the other end, and then enters the middle insulation frame through a bend pipe. It flows from one end of the middle insulation frame to the other end, and then enters the next middle insulation frame through a bend pipe. This process continues until it enters the bottom insulation frame, and finally enters the input end of the heat pump through the output pipe. Because the water still has residual heat, it flows along the top, middle, and bottom insulation frames, which has a certain insulation effect on the inner bottom heat exchange box, top heat exchange box, and middle heat exchange box, thus improving the efficiency of heat exchange. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a heat pump water heater unit with waste heat recovery and utilization provided by this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure from another angle is shown;

[0017] Figure 3 for Figure 1 A partial structural diagram of the structure shown;

[0018] Figure 4 for Figure 3 The diagram shows the structure of the bottom heat exchanger, the top heat exchanger, and multiple intermediate heat exchangers.

[0019] Figure 5 for Figure 4 The diagram shows the structural distribution of heat exchange tubes in the bottom heat exchange box, the top heat exchange box, and multiple intermediate heat exchange boxes.

[0020] The diagram is labeled as follows: 1. Heat pump; 2. Bottom heat exchanger; 3. Top heat exchanger; 4. Middle heat exchanger; 5. Heat exchanger tube; 6. Input pipe; 7. Main water inlet pipe; 8. Vertical water inlet pipe; 9. Water inlet valve; 10. Branch pipe; 11. Main water outlet pipe; 12. Vertical water outlet pipe; 13. Water outlet valve; 14. Manifold; 15. First water pump; 16. Top insulation frame; 17. Bottom insulation frame; 18. Middle insulation frame; 19. Bent pipe; 20. Output pipe; 21. Second water pump. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to the following: Figures 1-5 ,in, Figure 1 A schematic diagram of the structure of a heat pump water heater unit with waste heat recovery and utilization provided by this utility model; Figure 2 for Figure 1A schematic diagram of the structure from another angle is shown; Figure 3 for Figure 1 A partial structural diagram of the structure shown; Figure 4 for Figure 3 The diagram shows the structure of the bottom heat exchanger, the top heat exchanger, and multiple intermediate heat exchangers. Figure 5 for Figure 4 The diagram shows the structural distribution of heat exchange tubes in the bottom heat exchange box, the top heat exchange box, and multiple intermediate heat exchange boxes.

[0023] In the specific implementation process, such as Figures 1-5 As shown, the system includes a heat pump 1, a bottom heat exchange box 2, a top heat exchange box 3, and multiple intermediate heat exchange boxes 4. The output end of the heat pump 1 is fixedly connected to an input pipe 6. S-shaped heat exchange tubes 5 are installed inside the bottom heat exchange box 2, the top heat exchange box 3, and the multiple intermediate heat exchange boxes 4. The end of the input pipe 6 is connected to the input end of the heat exchange tube 5 in the bottom heat exchange box 2. The output end of the heat exchange tube 5 in the bottom heat exchange box 2 is connected to the input end of the heat exchange tube 5 in the intermediate heat exchange boxes 4. The input and output ends of the heat exchange tubes 5 in the multiple intermediate heat exchange boxes 4 are connected sequentially. The heat exchange tube 5 in the top heat exchange box 3 is connected to the output end of the heat exchange tube 5 in the adjacent intermediate heat exchange box 4. The output end of the heat exchange tube 5 is connected to the input end of the heat pump 1. The bottom heat exchange box 2, the top heat exchange box 3 and the multiple intermediate heat exchange boxes 4 are connected to a water inlet device on one side, and the bottom heat exchange box 2, the top heat exchange box 3 and the multiple intermediate heat exchange boxes 4 are connected to a water outlet device on the other side. The medium at the output end of the heat pump 1 enters the input pipe 6 and flows to the heat exchange tube 5 of the bottom heat exchange box 2 after passing through the input pipe 6, thus achieving heat exchange. Then, the medium flows along the heat exchange tubes 5 in the multiple intermediate heat exchange boxes 4 in sequence and finally enters the heat exchange tube 5 of the bottom heat exchange box 2. In this way, the medium at the output end of the heat pump 1 can be used for water heating, which reduces the waste of heat source to a certain extent.

[0024] The water inlet device includes a main water inlet pipe 7, a vertical water inlet pipe 8, a water inlet valve 9, and multiple branch pipes 10. The water inlet valve 9 is installed on the main water inlet pipe 7. One end of the main water inlet pipe 7 is fixedly connected to the output end of the first water pump 15. The input end of the first water pump 15 can be connected to an external water source through a water pipe. One end of the main water inlet pipe 7 is installed with a vertical water inlet pipe 8 that is closed at both ends. One end of the multiple branch pipes 10 is fixedly connected to the vertical water inlet pipe 8. The other end of the multiple branch pipes 10 is fixedly connected to the inner cavity of the bottom heat exchange box 2, the top heat exchange box 3, and multiple intermediate heat exchange boxes 4, respectively. When the water inlet valve 9 is opened and the water outlet valve 13 is closed, external water is drawn by the first water pump 15. The external water flows through the main water inlet pipe 7, the first water pump 15, the vertical water inlet pipe 8, and the multiple branch pipes 10 to the inside of the bottom heat exchange box 2, the multiple intermediate heat exchange boxes 4, and the top heat exchange box 3.

[0025] The water outlet device includes a main outlet pipe 11, an outlet riser pipe 12, an outlet valve 13, and multiple manifolds 14. The multiple manifolds 14 are respectively fixedly connected to the inner cavities of the bottom heat exchange box 2, the top heat exchange box 3, and multiple intermediate heat exchange boxes 4. One end of the multiple manifolds 14 is fixedly connected to the outlet riser pipe 12. The outlet riser pipe 12 is fixedly connected to one end of the main outlet pipe 11. The outlet valve 13 is installed on the main outlet pipe 11. The other end of the main outlet pipe 11 is connected to the input end of the second water pump 21. The output end of the second water pump 21 can be connected to other pipes to heat the water for household use. After heat exchange is completed, the hot water is drained for use by opening the outlet valve 13 and the second water pump 21.

[0026] An insulation device is connected between the output end of the heat exchange tube 5 in the top heat exchange box 3 and the input end of the heat pump 1. The insulation device is arranged around the bottom heat exchange box 2, the top heat exchange box 3, and multiple intermediate heat exchange boxes 4. The insulation device includes a top insulation frame 16, a bottom insulation frame 17, and multiple intermediate insulation frames 18. The top insulation frame 16, the bottom insulation frame 17, and the multiple intermediate insulation frames 18 are fitted on the outside of the top heat exchange box 3, the bottom heat exchange box 2, and the multiple intermediate heat exchange boxes 4. The top insulation frame 16, the bottom insulation frame 17, and the multiple intermediate insulation frames 18 are all hollow structures. A partition plate is provided on the top insulation frame 16, the bottom insulation frame 17, and the multiple intermediate insulation frames 18. The output end of heat pipe 5 is connected to one end of the inner cavity of the top insulation frame 16. The other end of the inner cavity of the top insulation frame 16 is connected to one end of the adjacent intermediate insulation frame 18 through a bent pipe 19. The two ends of multiple intermediate insulation frames 18 are connected in sequence through multiple bent pipes 19. One end of the inner cavity of the bottom insulation frame 17 is connected to the bent pipe 19 on the adjacent intermediate insulation frame 18. The other end of the inner cavity of the bottom insulation frame 17 is connected to the input end of the heat pump 1 through an output pipe 20. Since the water with residual heat flows along the top insulation frame 16, the intermediate insulation frame 18 and the bottom insulation frame 17, it plays a certain role in heat preservation for the bottom heat exchange box 2, the top heat exchange box 3 and the intermediate heat exchange box 4 on the inside, thereby improving the efficiency of heat exchange.

[0027] The working principle of this utility model is as follows: When using the device, the inlet valve 9 is opened and the outlet valve 13 is closed. External water is drawn in by the first water pump 15. The external water flows through the main inlet pipe 7, the first water pump 15, the inlet vertical pipe 8, and multiple branch pipes 10 to the inside of the bottom heat exchange box 2, multiple intermediate heat exchange boxes 4, and the top heat exchange box 3. After water injection, the medium from the output end of the heat pump 1 enters the input pipe 6 and flows to the heat exchange tube 5 of the bottom heat exchange box 2 for heat exchange. Then, the medium flows sequentially along the heat exchange tubes 5 of the multiple intermediate heat exchange boxes 4, finally entering the heat exchange tube 5 of the bottom heat exchange box 2. After heat exchange, the medium still has residual heat, at which point the medium enters... Inside the top insulation frame 16, water flows from one end of the top insulation frame 16 to the other end and then enters the middle insulation frame 18 through the bend pipe 19. After flowing from one end of the middle insulation frame 18 to the other end, it enters the next middle insulation frame 18 through the bend pipe 19, and so on until it enters the bottom insulation frame 17. Finally, it enters the input end of the heat pump 1 through the output pipe 20. Since the water still has residual heat, it flows along the top insulation frame 16, the middle insulation frame 18 and the bottom insulation frame 17, which has a certain heat preservation effect on the bottom heat exchange box 2, the top heat exchange box 3 and the middle heat exchange box 4 on the inside, and improves the efficiency of heat exchange. Finally, the hot water is drained for use by opening the water outlet valve 13 and the second water pump 21.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heat pump hot water unit with waste heat recovery, characterized by, The utility model provides a heat pump water heater, including heat pump (1), bottom heat exchange box (2), top heat exchange box (3) and a plurality of intermediate heat exchange box (4), the output of heat pump (1) is fixedly connected with input pipe (6), bottom heat exchange box (2), top heat exchange box (3) and a plurality of intermediate heat exchange box (4) inside are all installed with the heat exchange pipe (5) of S type bending, the end of input pipe (6) is connected with the input of heat exchange pipe (5) in bottom heat exchange box (2), the output of heat exchange pipe (5) in bottom heat exchange box (2) is connected with the input of heat exchange pipe (5) in intermediate heat exchange box (4), the input and output of heat exchange pipe (5) of a plurality of intermediate heat exchange box (4) are connected in proper order, the output of heat exchange pipe (5) in top heat exchange box (3) is connected with the output of heat exchange pipe (5) in adjacent intermediate heat exchange box (4), the output of heat exchange pipe (5) in top heat exchange box (3) is connected with the input of heat pump (1), and one side of bottom heat exchange box (2), top heat exchange box (3) and a plurality of intermediate heat exchange box (4) is connected with water inlet device, and the other side of bottom heat exchange box (2), top heat exchange box (3) and a plurality of intermediate heat exchange box (4) is connected with water outlet device.

2. The heat pump hot water unit with waste heat recovery according to claim 1, characterized in that, The water inlet device includes a water inlet main pipe (7), a water inlet vertical pipe (8), a water inlet valve (9), and a plurality of shunt pipes (10). The water inlet valve (9) is installed on the water inlet main pipe (7). One end of the water inlet main pipe (7) is fixedly connected with the output of a first water pump (15). The water inlet main pipe (7) is installed with a water inlet vertical pipe (8) with closed two ends. One end of each of the plurality of shunt pipes (10) is fixedly connected to the water inlet vertical pipe (8). The other end of each of the plurality of shunt pipes (10) is fixedly connected to the inner cavity of the bottom heat exchange box (2), the top heat exchange box (3), and the plurality of intermediate heat exchange boxes (4), respectively.

3. The heat pump hot water unit with waste heat recovery according to claim 2, characterized in that, The water outlet device includes a water outlet main pipe (11), a water outlet vertical pipe (12), a water outlet valve (13), and a plurality of flow pipes (14). The plurality of flow pipes (14) are fixedly connected to the inner cavities of the bottom heat exchange box (2), the top heat exchange box (3), and the plurality of intermediate heat exchange boxes (4), respectively. One end of each of the plurality of flow pipes (14) is fixedly connected to the water outlet vertical pipe (12) in common. The water outlet vertical pipe (12) is fixedly connected with one end of the water outlet main pipe (11). The water outlet valve (13) is installed on the water outlet main pipe (11). The other end of the water outlet main pipe (11) is connected with the input of a second water pump (21).

4. The heat pump hot water unit with waste heat recovery according to claim 3, characterized in that, A heat preservation device is connected between the output of the heat exchange pipe (5) in the top heat exchange box (3) and the input of the heat pump (1). The heat preservation device is arranged around the bottom heat exchange box (2), the top heat exchange box (3), and the plurality of intermediate heat exchange boxes (4).

5. The heat pump water heating unit with waste heat recovery according to claim 4, wherein, The heat preservation device comprises a top heat preservation frame (16), a bottom heat preservation frame (17) and a plurality of intermediate heat preservation frames (18), the top heat preservation frame (16), the bottom heat preservation frame (17) and the plurality of intermediate heat preservation frames (18) are sleeved outside the top heat exchange box (3), the bottom heat exchange box (2) and the plurality of intermediate heat exchange boxes (4), the top heat preservation frame (16), the bottom heat preservation frame (17) and the plurality of intermediate heat preservation frames (18) are all hollow structures, the top heat preservation frame (16), the bottom heat preservation frame (17) and the plurality of intermediate heat preservation frames (18) are all provided with partition plates, the output end of the heat exchange pipe (5) in the top heat exchange box (3) is connected with one end of the inner cavity of the top heat preservation frame (16), the other end of the inner cavity of the top heat preservation frame (16) is connected with one end of the adjacent intermediate heat preservation frame (18) through the bending pipe (19), the two ends of the plurality of intermediate heat preservation frames (18) are sequentially connected through the plurality of bending pipes (19), one end of the inner cavity of the bottom heat preservation frame (17) is connected with the bending pipe (19) on the adjacent intermediate heat preservation frame (18), the other end of the inner cavity of the bottom heat preservation frame (17) is connected with the input end of the heat pump (1) through the output pipe (20).

6. The heat pump hot water unit with waste heat recovery according to claim 5, wherein, The input pipe (6) penetrates through the bottom heat preservation frame (17).

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