A combined cooling and heating system with waste heat recovery function

Abstract

The utility model discloses a kind of cold-heat cogeneration systems with waste heat recovery function, including hot water heat pump unit, several heating pools, heat storage water tank and cold water storage tank, wherein, the hot water heat pump unit is recycled intercommunication with heat storage water tank and cold water storage tank by default outlet pipe and inlet pipe;Every described heating pool is equipped with a heat exchange coil;High-temperature hot water in the heat storage water tank flows to each heat exchange coil place and carries out heat release by heat supply main pipe and heating branch pipe, and flows back heat storage water tank by backwater branch pipe and backwater main pipe;The back energy main pipe bypass leads out several back energy branch pipes respectively corresponding to the heat exchange coil in each heating pool one by one;Low-temperature cold water of the cold water storage tank flows to each heat exchange coil place and carries out heat absorption by cooling main pipe and cooling branch pipe, and flows back cold water storage tank by back energy branch pipe and back energy main pipe;The utility model improves energy utilization efficiency by utilizing the waste heat generated by hot water heat pump unit, reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of heat pump waste heat recovery technology, and in particular to a combined cooling and heating system with waste heat recovery function. Background Technology

[0002] With increasing energy consumption and growing environmental awareness, efficient energy utilization and reduced energy waste have become pressing issues. Traditional heating and cooling systems often operate independently, resulting in low energy conversion efficiency and significant unutilized waste heat. Therefore, developing a combined heat and power (CHP) system that can simultaneously meet heating and cooling demands while recovering waste heat is of great importance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a combined cooling and heating system with waste heat recovery function, so as to realize the efficient recovery and recycling of heat energy, improve energy utilization efficiency, and reduce energy consumption.

[0004] To achieve the above objectives, this utility model provides a combined cooling and heating system with waste heat recovery function, characterized in that: it includes a hot water heat pump unit, several heating pools, a hot water storage tank, and a cold water storage tank, wherein the hot water heat pump unit is circulatedly connected to the hot water storage tank and the cold water storage tank through preset outlet and inlet pipes; each heating pool is equipped with a heat exchange coil; the hot water storage tank has a main heating pipe and a return water pipe leading out, the main heating pipe is bypassed to lead out several heating branch pipes respectively connected to the heat exchange coils in each of the heating pools, and the return water pipe is bypassed to lead out several heat exchange coils respectively connected to the heat exchange coils in each of the heating pools. A corresponding return water branch pipe is provided; the high-temperature hot water in the hot water storage tank flows to each heat exchange coil for heat release through the heating main pipe and heating branch pipes, and then flows back to the hot water storage tank through the return water branch pipe and return water main pipe; the cold water storage tank has a cooling main pipe and a return energy main pipe, the cooling main pipe is bypassed to lead out several cooling branch pipes that are respectively connected to each heat exchange coil in each of the heating pools, and the return energy main pipe is bypassed to lead out several return energy branch pipes that are respectively connected to each heat exchange coil in each of the heating pools; the low-temperature cold water in the cold water storage tank flows to each heat exchange coil for heat absorption through the cooling main pipe and cooling branch pipes, and then flows back to the cold water storage tank through the return energy branch pipe and return energy main pipe.

[0005] Furthermore, each of the heating branch pipes is equipped with a first solenoid valve for controlling the on / off state.

[0006] Furthermore, each of the return water branch pipes is equipped with a second solenoid valve for controlling the on / off state.

[0007] Furthermore, each of the cooling branch pipes is equipped with a third solenoid valve for controlling the on / off state; Furthermore, each of the aforementioned energy return branch pipes is equipped with a fourth solenoid valve for controlling the on / off state.

[0008] Furthermore, each of the heating pools is equipped with an electric auxiliary heating unit.

[0009] Furthermore, the electric auxiliary heating unit is a heating wire.

[0010] Furthermore, the hot water heat pump unit includes a compressor, a four-way valve, a hot water-side condenser, a cold water-side evaporator, and an air-side heat exchanger. The four-way valve is connected to the compressor's exhaust port, one end of the hot water-side condenser, one end of the cold water-side evaporator, and one end of the air-side heat exchanger, respectively. The other end of the hot water-side condenser is connected to the other end of the air-side heat exchanger, and the other end of the cold water-side evaporator is connected to the compressor's return air port.

[0011] Furthermore, the heat exchange coil is spiral-shaped.

[0012] Furthermore, the heat exchange coil is serpentine.

[0013] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: through the waste heat recovery mechanism, the present invention effectively utilizes the waste heat generated by the hot water heat pump unit, improves energy utilization efficiency, and reduces energy consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a combined cooling and heating system.

[0015] Figure 2 This is a schematic diagram of a heat pump unit for producing hot water.

[0016] Among them, 1-hot water heat pump unit, 11-compressor, 12-four-way valve, 13-hot water side condenser, 14-air side heat exchanger, 15-cold water side evaporator, 2-hot water storage tank, 3-one heating pool, 31-heat exchange coil, 32-electric auxiliary heating unit, 4-cold water storage tank, 5-outlet pipe, 6-inlet pipe, 71-heating main pipe, 72-return water main pipe, 73-heating branch pipe, 74-return water branch pipe, 81-cooling main pipe, 82-energy return main pipe, 83-cooling branch pipe, 84-energy return branch pipe. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0018] See appendix Figure 1 and2 As shown in this embodiment, a combined cooling and heating system with waste heat recovery function is suitable for heating tanks in processes such as those used in circuit board manufacturing. Specifically, it includes a hot water heat pump unit 1, several heating tanks 3, a hot water storage tank 2, and a cold water storage tank 4. The hot water heat pump unit 1 is circulated with the hot water storage tank 2 and the cold water storage tank 4 through pre-set outlet pipes 5 and inlet pipes 6 to ensure the transmission and recovery of heat energy. That is, the hot water heat pump unit 1 and the hot water storage tank 2, and the hot water heat pump unit 1 and the cold water storage tank 4 are both connected by an outlet pipe 5 and an inlet pipe 6 to form a heating circulation path. The high-temperature hot water produced by the hot water heat pump unit 1 can be sent to the hot water storage tank 2 through one of the outlet pipes 5, and the water in the hot water storage tank 2 can flow back to the hot water heat pump unit 1 through one of the inlet pipes 6, thus forming a circulating heating path between the hot water heat pump unit 1 and the hot water storage tank 2. The low-temperature chilled water produced by the hot water heat pump unit 1 can be sent to the cold water storage tank 4 through another outlet pipe 5, and the water in the cold water storage tank 4 can flow back to the hot water heat pump unit 1 through another inlet pipe 6, thus forming a cooling circulation path between the hot water heat pump unit 1 and the cold water storage tank 4.

[0019] In this embodiment, each heating pool 3 contains circuit board processing fluid, and each heating pool 3 is equipped with a heat exchange coil 31 as the core component for heat energy exchange. The hot water storage tank 2 is connected to the heat exchange coil 31 in each heating pool through a heating main pipe 71 and a return water main pipe 72 to form a heating cycle. Specifically, in this embodiment, the heating main pipe 71 is bypassed to lead out several heating branch pipes 73, which are respectively connected to the heat exchange coil 31 in each heating pool 3. The return water main pipe 72 is bypassed to lead out several return water branch pipes 74, which are respectively connected to the heat exchange coil 31 in each heating pool 3. By adopting the branch form of heating branch pipes 73 and return water branch pipes 74, independent heat exchange control of any heating pool 3 can be realized, which greatly improves flexibility and allows heat energy exchange to be carried out as needed. The high-temperature hot water in the hot water storage tank 2 flows to each heat exchange coil 31 through the heating main pipe 71 and the heating branch pipe 73 to release heat, and then flows back to the hot water storage tank 2 through the return branch pipe 74 and the return main pipe 72, thus forming a heating circulation path between the hot water storage tank 2 and each heating pool 3.

[0020] In this embodiment, when any heating pool is not in operation, its circuit board processing fluid still has a certain amount of residual heat, which can be recovered through the cold water storage tank 4 as one of the heat sources for the hot water heat pump unit 1. Specifically, in this embodiment, the cold water storage tank 4 has a cooling main pipe 81 and a recovery main pipe 82. The cooling main pipe 81 is bypassed to lead out several cooling branch pipes 83, which are respectively connected to the heat exchange coils 31 in each heating pool 3. The recovery main pipe 82 is bypassed to lead out several recovery branch pipes 84, which are respectively connected to the heat exchange coils 31 in each heating pool 3. By adopting the branching form of the cooling main pipe 81 and the recovery main pipe 82, independent recovery control of any heating pool 3 can be realized, greatly improving flexibility and allowing heat recovery to be performed as needed. The low-temperature cold water in the cold water storage tank 4 flows to each heat exchange coil 31 through the cooling main pipe 81 and the cooling branch pipe 83 to absorb heat, and then flows back to the cold water storage tank 4 through the energy return branch pipe 84 and the energy return main pipe 82, thus forming a waste heat recovery circulation path between the cold water storage tank 4 and each heating pool 3.

[0021] To improve the flexibility and efficiency of system operation, this embodiment includes a first solenoid valve on each heating branch pipe 73 to control the on / off state of each heating branch pipe 73; and a second solenoid valve on each return water branch pipe 74, also for controlling the on / off state of the return water branch pipe 74. A third solenoid valve is installed on each cooling branch pipe 83 to control the on / off state of each cooling branch pipe 83; and a fourth solenoid valve is installed on each return energy branch pipe 84 to control the on / off state of the return energy branch pipe 84. Based on this, the installation of these solenoid valves allows the system to flexibly adjust the heating or cooling supply of each heating pool 3 according to actual needs.

[0022] In summary, high-temperature hot water flows out of the hot water storage tank 2, and is distributed to each heating branch pipe 73 via the main heating pipe 71. After releasing heat in the corresponding heat exchange coil 31, the hot water returns to the hot water storage tank 2 via the return water branch pipe 74, completing the heat transfer during the heating process. The cold water storage tank 4 is connected to the heat exchange coils 31 in each heating pool via the cold water supply main pipe 81 and the return water main pipe 82, forming a cooling cycle. Low-temperature cold water flows out of the cold water storage tank 4, is distributed to each cold water branch pipe 83 via the cold water supply main pipe 81, absorbs heat in the corresponding heat exchange coil 31, and returns to the cold water storage tank 4 via the return water branch pipe 84, realizing the heat recovery during the cooling process.

[0023] In this embodiment, each heating tank is equipped with an electric auxiliary heating unit 32, which can electrically heat the circuit board processing liquid in the heating tank to supplement the heat energy when the heating capacity of the hot water storage tank 2 is insufficient. Furthermore, the electric auxiliary heating unit 32 can be a common electric heating element such as a heating wire.

[0024] Furthermore, the heat exchange coil 31 adopts a spiral or serpentine design to increase the heat exchange area and improve the heat exchange efficiency.

[0025] In this embodiment, the hot water heat pump unit 1 includes a compressor 11, a four-way valve 12, a hot water-side condenser 13, a cold water-side evaporator 15, and an air-side heat exchanger 14. The four-way valve 12 has four ports: A, B, C, and D. The connection of the hot water heat pump unit is as follows: ports A, B, C, and D of the four-way valve 12 are respectively connected to the exhaust port of the compressor 11, one end of the hot water-side condenser 13, one end of the cold water-side evaporator 15, and one end of the air-side heat exchanger 14. The other end of the hot water-side condenser 13 is connected to the other end of the air-side heat exchanger 14, and the other end of the cold water-side evaporator 15 is connected to the return port of the compressor 11. Based on the aforementioned hot water heat pump unit, the high-temperature, high-pressure refrigerant discharged from the compressor 11 flows to port A of the four-way valve 12, and then flows out from port B of the four-way valve 12 to the hot water side condenser 13 for heat release. Subsequently, the refrigerant after heat release flows out from the hot water side condenser 13 to the air side heat exchanger 14 for evaporation and heat absorption. Then, the refrigerant that has absorbed heat through evaporation flows through ports D and C of the four-way valve 12 into the cold water side evaporator 15 for secondary evaporation and heat absorption, and finally flows back from the cold water side evaporator 15 to the return port of the compressor 11, thus forming a refrigerant circulation path. In addition, the two outlet pipes 5 and inlet pipes 6 corresponding to the hot water storage tank 2 and the cold water storage tank 4 are respectively introduced into the hot water side condenser 13 and the cold water side evaporator 15 for heat exchange.

[0026] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or alterations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A combined cooling and heating system with waste heat recovery function, characterized in that: The system includes a hot water heat pump unit (1), at least one heating tank (3), a hot water storage tank (2), and a cold water storage tank (4). The hot water heat pump unit (1), the hot water storage tank (2), and the cold water storage tank (4) are all connected in a loop through a pre-set outlet pipe (5) and inlet pipe (6). Each heating tank (3) is equipped with at least one heat exchange coil (31). The hot water storage tank (2) has a heating main pipe (71) and a return water main pipe (72) leading out. The heating main pipe (71) is bypassed to lead out several coils that are respectively connected to each of the heating tanks. The heat exchange coils (31) in the pool (3) are connected one-to-one with the heating branch pipes (73). The return water main pipe (72) is bypassed to lead out several return water branch pipes (74) that are connected one-to-one with the heat exchange coils (31) in each of the heating pools (3). The high-temperature hot water in the hot water storage tank (2) flows through the heating main pipe (71) and the heating branch pipes (73) to each of the heat exchange coils (31) to release heat, and flows back to the hot water storage tank (2) through the return water branch pipes (74) and the return water main pipe (72). The cold water storage tank (4) has a cooling main pipe (81) and a return main pipe (82) leading out. The cooling main pipe (81) is bypassed to lead out several cooling branch pipes (83) that are respectively connected to the heat exchange coils (31) in each of the heating pools (3). The return main pipe (82) is bypassed to lead out several return branch pipes (84) that are respectively connected to the heat exchange coils (31) in each of the heating pools (3). The low-temperature cold water in the cold water storage tank (4) flows to each of the heat exchange coils (31) through the cooling main pipe (81) and the cooling branch pipes (83) to absorb heat, and flows back to the cold water storage tank (4) through the return branch pipes (84) and the return main pipe (82).

2. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: Each heating branch pipe (73) is equipped with a first solenoid valve for controlling the on / off state.

3. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: Each of the aforementioned return water branch pipes (74) is equipped with a second solenoid valve for controlling the on / off state.

4. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: Each cooling branch pipe (83) is equipped with a third solenoid valve for controlling the on / off state.

5. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: Each of the aforementioned regenerative branch pipes (84) is provided with a fourth solenoid valve for controlling the on / off state.

6. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: Each of the heating pools is equipped with an electric auxiliary heating unit (32).

7. A combined cooling and heating system with waste heat recovery function according to claim 6, characterized in that: The electric auxiliary heating unit (32) is a heating wire.

8. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: The hot water heat pump unit (1) includes a compressor (11), a four-way valve (12), a hot water side condenser (13), a cold water side evaporator (15), and an air side heat exchanger (14). The four-way valve (12) is connected to the exhaust port of the compressor (11), one end of the hot water side condenser (13), one end of the cold water side evaporator (15), and one end of the air side heat exchanger (14), respectively. The other end of the hot water side condenser (13) is connected to the other end of the air side heat exchanger (14), and the other end of the cold water side evaporator (15) is connected to the return air port of the compressor (11).

9. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: The heat exchange coil (31) is spiral-shaped.

10. A combined cooling and heating system with waste heat recovery function according to claim 1, characterized in that: The heat exchange coil (31) is serpentine.

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