Dual energy heat exchanger

Abstract

The utility model discloses a dual energy heat exchange device, containing heat pump circulation, heated water circulation, boiler combustion and flue gas preheating four big systems, and the heat pump circulation system is equipped with the import and export of refrigerant and primary and secondary refrigerant pipe, and the air source heat pump is connected to realize heat exchange transmission, and the primary and secondary refrigerant pipe is arranged in the secondary, primary water cavity of heated water circulation respectively. Heated water circulation system is composed of inlet and outlet water, multistage water cavity, communicating pipe and finned tube, completes water circulation heat exchange, and boiler combustion system utilizes gas air premixing to burn and heats, is divided into hearth and flue gas chamber through the partition, and flue gas preheating system is composed of flue and smoke pipe, recycles flue gas waste heat, and boiler combustion system is covered with secondary water cavity, and the primary water cavity is arranged in the inside of side flue cavity, and the primary water cavity is arranged in the smoke pipe, and the upper and lower water cavities are arranged in the upper portion of hearth and the lower portion of flue gas chamber respectively, and the device combines air source heat pump and gas boiler double heat source heating, recycles flue gas waste heat efficiently, and the heat exchange effect is good, and energy -conserving and environment -protective, and the practicality is strong.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation and air conditioning equipment technology, and in particular to a dual-energy heat exchange device. Background Technology

[0002] In hotels, factories, schools, government offices, and homes, heating is typically provided by centralized heating or individual heating devices. Traditional gas boilers consume a lot of gas when operating alone, and the utilization rate of waste heat from flue gas is insufficient. Similarly, traditional air source heat pumps experience a significant drop in heating efficiency at low temperatures, requiring electric auxiliary heating, which leads to a surge in energy consumption. Both methods suffer from high energy consumption, poor environmental impact, low heating efficiency, and poor economic performance. Neither approach can meet the requirements of energy conservation and environmental protection, fails to comply with low-carbon and environmental protection regulations, and cannot meet national policies on the effective use of resources and the circular economy. They also fail to achieve cleaner, healthier, and more sustainable energy utilization. Summary of the Invention

[0003] According to one objective of the present invention, a dual-energy heat exchange device is provided, comprising a heat pump circulation system consisting of a refrigerant inlet, a primary refrigerant pipe, a secondary refrigerant pipe, and a refrigerant outlet; a hot water circulation system consisting of a water inlet, a primary water chamber, a connecting pipe, a secondary water chamber, a lower water chamber, inner finned tubes, outer finned tubes, an upper water chamber, and a water outlet; a boiler combustion system consisting of a premixed gas composed of fuel gas and air, a burner, a furnace, a baffle plate, and a flue gas chamber; and a flue gas preheating system consisting of a lower flue, a side flue, an upper flue, and flue pipes. The pump circulation system is connected to an external air source heat pump. The heat generated by the air source heat pump is exchanged and transferred in the heat pump circulation system. The primary refrigerant pipe and the secondary refrigerant pipe of the heat pump circulation system are respectively immersed in the primary water chamber and the secondary water chamber of the hot water circulation system. The outer wall of the boiler combustion system wraps the secondary water chamber, and the inner wall of the side flue chamber wraps the primary water chamber. The flue pipe is wrapped inside the primary water chamber. The partition divides the boiler combustion system into two parts: the furnace and the flue gas chamber. The upper water chamber is located in the upper part of the furnace, and the lower water chamber is located in the lower part of the flue gas chamber.

[0004] Furthermore, the burner is located at the center of the furnace.

[0005] Furthermore, the inner and outer finned tubes are evenly distributed on circles of different diameters from the inside to the outside, with the burner as the center.

[0006] Furthermore, the finned tube is made of stainless steel.

[0007] This invention features a fully counter-current design. The high-temperature flue gas generated by combustion flows from top to bottom and from left to right, while the water flows in the opposite direction, from bottom to top and from right to left. During the flow, the water gradually absorbs heat from the flue gas of the combustion system, resulting in the highest outlet water temperature, the most complete heat absorption, and the highest thermal efficiency. At the same time, by combining the utilization of air energy and the chemical energy of boiler combustion, it achieves the requirements of low energy consumption and low pollution, complies with national energy conservation and environmental protection policies, meets the users' requirements for heating economy, and realizes the environmental protection and sustainability of energy use in economic development. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a cross-sectional view of an embodiment of the present invention;

[0010] Figure 2 This is an axonometric view of an embodiment of the invention;

[0011] Figure 3 This is a separate isometric view of the heat pump cycle system according to an embodiment of the present invention.

[0012] In the diagram: 1. Premixed gas; 2. Upper water chamber; 3. Connecting pipe; 4. Upper flue; 5. Side flue; 6. Primary water chamber; 7. Secondary refrigerant pipe; 8. Water inlet; 9. Lower flue; 10. Flue pipe; 11. Secondary water chamber; 12. Lower water chamber; 13. Flue gas chamber; 14. Primary refrigerant pipe; 15. Refrigerant inlet; 16. Baffle; 17. External finned tube; 18. Internal finned tube; 19. Water outlet; 20. Furnace; 21. Burner; 22. Refrigerant outlet; 23. Furnace wall. Detailed Implementation

[0013] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0015] Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Additionally, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] Example 1

[0017] like Figure 1 , Figure 2 , Figure 3 As shown, a dual-energy heat exchange device includes a heat pump circulation system consisting of a refrigerant inlet 15, a primary refrigerant pipe 14, a secondary refrigerant pipe 7, and a refrigerant outlet 22; a hot water circulation system consisting of a water inlet 8, a primary water chamber 6, a connecting pipe 3, a secondary water chamber 11, a lower water chamber 12, an inner finned tube 18, an outer finned tube 17, an upper water chamber 2, and a water outlet 19; a boiler combustion system consisting of a premixed gas 1, a burner 21, a furnace 20, a baffle 16, and a flue gas chamber 13; and a flue gas preheating system consisting of a lower flue 9, a side flue 5, an upper flue 4, and a flue pipe 10. The heat pump circulation system is externally connected to an air source heat pump, and the heat generated by the air source heat pump is exchanged and transferred within the heat pump circulation system. The pump circulation system is immersed in the middle of the hot water circulation system, wherein the secondary refrigerant pipe 7 is immersed in the primary water chamber 6, the primary refrigerant pipe 14 is immersed in the secondary water chamber 11, the outer wall of the boiler combustion system wraps the secondary water chamber 11, the inner wall of the side flue chamber 5 wraps the primary water chamber 6, the inner wall of the primary water chamber 6 wraps the flue pipe 10, the partition 16 divides the boiler combustion system into two parts: the furnace 20 and the flue gas chamber 13, the upper water chamber 2 is located in the upper part of the furnace 20, the lower water chamber 12 is located in the lower part of the flue gas chamber 13, the burner 21 is located in the center of the furnace 20, and the inner finned tube 18 and the outer finned tube 17 are evenly distributed on circles of different diameters from the inside to the outside with the burner 21 as the center.

[0018] When the present invention is working normally, the operation of the boiler combustion system and flue gas preheating system is as follows: the premixed gas 1 composed of natural gas and air enters the burner 21 and is ignited on the surface of the burner 21. The heat generated is transferred to the water in the inner finned tube 18 and the outer finned tube 17 as it flows through the inner finned tube 18 and the outer finned tube 17, so that the temperature of the water continuously rises and becomes hot water. After passing through the inner finned tube 18 and the outer finned tube 17, the flue gas comes into contact with the furnace wall 23. Heat is transferred through the furnace wall 23 to the water in the outer secondary water chamber 11. The flue gas continues to flow downwards around the baffle 16, passing through the outer finned tube 17 and the inner finned tube 18 again, where heat is again transferred to the water in the finned tubes and collected in the flue gas chamber 13. It then flows sequentially through the lower flue 9, the side flue chamber 5, the upper flue 4, and the flue pipe 10, finally exiting the system. During its passage through the side flue chamber 5 and the flue pipe 10, the water in the secondary water chamber 6 is heated again, ensuring comprehensive heat transfer. The flue gas flow direction is as follows: Figure 1 As indicated by the dashed arrow.

[0019] Meanwhile, the hot water circulation system operates as follows: Cold water flows in from inlet 8, passing through primary water chamber 6, connecting pipe 3, secondary water chamber 11, lower water chamber 12, inner exhaust finned pipe 18 and outer exhaust finned pipe 17, upper water chamber 2, and outlet 19. When flowing through primary water chamber 6, the cold water absorbs residual heat from the flue gas in flue pipe 10 and side flue chamber 5, heating it to warm water. When flowing through secondary water chamber 11, the warm water absorbs heat from the furnace chamber 20 through furnace wall 23, further increasing its temperature to sub-warm water. When flowing through inner exhaust finned pipe 18 and outer exhaust finned pipe 17, it absorbs a large amount of heat released by the burner 21 burning premixed gas 1, turning the sub-warm water into hot water, which then flows out through the outlet to meet user needs. The water flow direction is as follows: Figure 1 The direction indicated by the solid line arrow.

[0020] Similar to a boiler combustion system, the heat pump circulation system, after being connected to an external air source heat pump, allows the refrigerant to absorb heat in the air source heat pump. The refrigerant flows from the refrigerant inlet 15 through the primary refrigerant pipe 14, the secondary refrigerant pipe 7, and the refrigerant outlet 22, finally circulating back into the air source heat pump to complete the next cycle of heat release. The secondary condenser pipe 7 heats the cold water in the primary water chamber 6, while the primary refrigerant pipe 14 heats the warm water in the secondary water chamber 11, gradually turning it into hot water to meet user needs. The refrigerant flow direction is as follows: Figure 3 The direction indicated by the solid line arrow.

[0021] The ambient temperature and outlet water temperature are monitored in real time by temperature sensors. When the ambient temperature is lower than the threshold, the boiler combustion system is automatically started to assist heating. In combination with peak and off-peak electricity price periods, the heat pump circulation system is prioritized to operate during off-peak electricity price periods to achieve a dynamic balance between energy consumption and economy.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double energy exchanger, characterized in that, This includes a heat pump circulation system consisting of a refrigerant inlet, primary refrigerant pipes, secondary refrigerant pipes, and a refrigerant outlet; a hot water circulation system consisting of a water inlet, primary water chamber, connecting pipes, secondary water chamber, lower water chamber, inner exhaust finned tubes, outer exhaust finned tubes, upper water chamber, and water outlet; a boiler combustion system consisting of a premixed gas (made of fuel gas and air), a burner, furnace, baffles, and flue gas chamber; and a flue gas preheating system consisting of a lower flue, side flue, upper flue, and flue pipes. The heat pump circulation system is externally connected to an air source heat pump. The heat generated by the air source heat pump is exchanged and transferred in the heat pump cycle system. The primary refrigerant pipe and the secondary refrigerant pipe of the heat pump cycle system are respectively immersed in the secondary water cavity and the primary water cavity of the hot water circulation system. The outer wall of the boiler combustion system wraps the secondary water cavity, the inner wall of the side flue cavity wraps the primary water cavity, and the flue pipe is wrapped inside the primary water cavity. The partition divides the boiler combustion system into two parts: the furnace and the flue gas chamber. The upper water cavity is located in the upper part of the furnace, and the lower water cavity is located in the lower part of the flue gas chamber.

2. A double energy heat exchanger according to claim 1, characterized in that The burner is located at the center of the furnace.

3. A double energy heat exchanger according to claim 1, wherein The inner and outer finned tubes are evenly distributed on circles of different diameters from the inside to the outside, with the burner as the center.

4. A double energy heat exchanger according to claim 1, wherein The finned tube is made of stainless steel.

5. The dual-energy heat exchanger according to claim 1, characterized in that, The flue gas flows in the opposite direction to the water flow in the hot water circulation system, forming a full counter-current heat exchange structure.

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