Air source heat pump device with multi-layer heat exchange structure

Abstract

An air source heat pump device with multi-layer heat exchange structure, comprising a heat pump main box, a first heat exchange assembly, a second heat exchange assembly and a third heat exchange assembly are sequentially arranged in the heat pump main box from top to bottom, an air inlet cavity is installed on one side of the heat pump main box, an air outlet cavity is installed on the other side of the heat pump main box, and a medium circulating pump set is installed at the bottom of the heat pump main box, the three layers of heat exchange assemblies are arranged in the heat pump main box, the first heat exchange assembly is used for processing high-temperature medium by using large-diameter spiral heat exchange pipes, the second heat exchange assembly and the third heat exchange assembly gradually improve the heat exchange efficiency of low-temperature medium by using small-diameter spiral heat exchange pipes, the heat exchange area is greatly increased, and the eddy current loss is reduced, the frequency conversion fan of the air inlet cavity and the flow distribution net ensure that the airflow uniformly flows through each heat exchange assembly, the heat exchange efficiency and the low-temperature adaptability of the air source heat pump are effectively improved, the energy consumption is reduced, and the use efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air source heat pump technology, and in particular to an air source heat pump device with a multi-layer heat exchange structure. Background Technology

[0002] Air source heat pumps, as a highly efficient and energy-saving heating and hot water supply device, are widely used in residential and commercial fields due to their ability to convert low-grade heat energy in the air. However, existing air source heat pumps have significant shortcomings in actual operation: traditional single-layer or simple double-layer heat exchange structures, limited by heat exchange area and flow channel design, are prone to heat exchange efficiency degradation in low-temperature environments, resulting in a decrease in heat pump heating capacity and an increase in compressor operating load; at the same time, the flow of hot and cold media during heat exchange is prone to generate local eddies, causing energy loss, and single-layer heat exchange structures lack specificity for energy utilization in different temperature ranges, failing to achieve gradient heat exchange, further reducing overall energy utilization efficiency.

[0003] Therefore, it is essential to provide an air source heat pump device with a multi-layer heat exchange structure to address the shortcomings of existing technologies. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an air source heat pump device with a multi-layer heat exchange structure. This invention sets up three layers of parallel and staggered heat exchange components in the main body of the heat pump. The first-stage heat exchange component uses a large-diameter spiral heat exchange tube to handle high-temperature media, while the second-stage and third-stage heat exchange components use small-diameter spiral heat exchange tubes to gradually improve the heat exchange efficiency of low-temperature media. This significantly increases the heat exchange area while reducing eddy current losses. The variable frequency fan and flow equalization network in the air inlet cavity ensure that the airflow flows evenly through each stage of the heat exchange components, effectively improving the heat exchange efficiency and low-temperature adaptability of the air source heat pump, reducing energy consumption, and improving utilization efficiency.

[0005] The above-mentioned objectives of this utility model are achieved through the following technical means.

[0006] An air source heat pump device with a multi-layer heat exchange structure is provided, including a heat pump main unit casing. Inside the heat pump main unit casing, a primary heat exchange component, a secondary heat exchange component, and a tertiary heat exchange component are arranged sequentially from top to bottom. An air inlet chamber is installed on one side of the heat pump main unit casing, and an air outlet chamber is installed on the other side. A medium circulation pump unit is installed at the bottom of the heat pump main unit casing. The medium circulation pump unit is connected to the primary heat exchange component, the secondary heat exchange component, and the tertiary heat exchange component through a distribution pipe. An electromagnetic regulating valve is installed on the distribution pipe. A control panel is installed on the outside of the heat pump main unit casing. The control panel is electrically connected to the medium circulation pump unit and the electromagnetic regulating valve.

[0007] Specifically, the primary, secondary, and tertiary heat exchange components have the same structure, all including a heat exchange core frame. Several spiral heat exchange tubes are embedded inside the heat exchange core frame. Both ends of the spiral heat exchange tubes are connected to manifolds. Quick-connect interfaces are provided on the outside of the manifolds. Guide plates are installed on both sides of the heat exchange core frame, and arc-shaped guide grooves are opened on the surface of the guide plates.

[0008] Specifically, the diameter of the spiral heat exchange tubes in the first-stage heat exchange assembly is 18-22mm, the diameter of the spiral heat exchange tubes in the second-stage heat exchange assembly is 14-16mm, and the diameter of the spiral heat exchange tubes in the third-stage heat exchange assembly is 10-12mm. The spiral heat exchange tubes are arranged in a staggered manner, and the center-to-center distance between adjacent spiral heat exchange tubes is 1.5-2 times the tube diameter.

[0009] Specifically, a variable frequency fan is installed inside the air inlet cavity, and a flow equalization mesh is provided on the inner side wall of the air inlet cavity. Several circular ventilation holes are evenly opened on the surface of the flow equalization mesh. A temperature sensor is installed inside the air outlet cavity, and the temperature sensor is electrically connected to the control panel.

[0010] Specifically, the medium circulation pump set includes a high-temperature circulation pump and a low-temperature circulation pump. The high-temperature circulation pump is connected to the primary heat exchange component through a branch pipe, and the low-temperature circulation pump is connected to the secondary and tertiary heat exchange components through a branch pipe.

[0011] This invention features three layers of parallel, staggered heat exchange components within the main heat pump casing. The first-stage heat exchange component utilizes large-diameter spiral heat exchange tubes to handle high-temperature media, while the second and third-stage components use small-diameter spiral heat exchange tubes to gradually improve the heat exchange efficiency for low-temperature media. This significantly increases the heat exchange area while reducing eddy current losses. The variable frequency fan and flow equalization network in the air inlet cavity ensure uniform airflow through each stage of the heat exchange components, effectively improving the heat exchange efficiency and low-temperature adaptability of the air source heat pump, reducing energy consumption, and increasing operational efficiency. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0013] Figure 1 This is a front view of an air source heat pump device with a multi-layer heat exchange structure according to this utility model.

[0014] Figure 2 This is a partial three-dimensional view of the primary heat exchange component in an air source heat pump device with a multi-layer heat exchange structure according to this utility model.

[0015] from Figures 1 to 2 Including: 1. Heat pump main unit casing; 2. Primary heat exchanger assembly; 3. Secondary heat exchanger assembly; 4. Tertiary heat exchanger assembly; 5. Air inlet chamber; 6. Air outlet chamber; 7. Medium circulation pump unit; 8. Diversion pipe; 9. Control panel; 10. Heat exchanger core frame; 11. Spiral heat exchanger tube; 12. Manifold; 13. Quick-connect connector; 14. Guide plate; 15. Arc-shaped guide groove; 16. Variable frequency fan; 17. Flow equalization mesh; 18. Temperature sensor; 19. Electromagnetic regulating valve; 20. High-temperature circulation pump; 21. Low-temperature circulation pump. Detailed Implementation

[0016] The present invention will be further described in conjunction with the following embodiments.

[0017] Example 1. like Figure 1-2 As shown, an air source heat pump device with a multi-layer heat exchange structure includes a heat pump main unit 1. The heat pump main unit 1 is welded from stainless steel. The interior is divided into three independent heat exchange areas from top to bottom by a partition plate. The first-stage heat exchange component 2, the second-stage heat exchange component 3, and the third-stage heat exchange component 4 are installed respectively. The three are arranged in parallel and staggered to ensure that the airflow can fully contact the heat exchange components at each stage during the flow process and avoid airflow short circuit.

[0018] An air inlet chamber 5 is welded to one side of the heat pump main casing 1, and an air outlet chamber 6 is welded to the other side. Both the air inlet chamber 5 and the air outlet chamber 6 are rectangular cavity structures and are connected to the heat exchange area of ​​the heat pump main casing 1 through flanges to form a complete airflow channel. A medium circulation pump group 7 is fixedly installed at the bottom of the heat pump main casing 1 with bolts. The medium circulation pump group 7 is connected to the first-stage heat exchange component 2, the second-stage heat exchange component 3, and the third-stage heat exchange component 4 through the diversion pipe 8 to realize the stratified transportation of the heat exchange medium. A control panel 9 is fixedly installed on the outside of the heat pump main casing 1 with screws. The control panel 9 has a built-in PLC control system and is electrically connected to the electrical control components of the medium circulation pump group 7 and the heat exchange components at each stage to realize automated control.

[0019] The primary heat exchanger assembly 2, the secondary heat exchanger assembly 3, and the tertiary heat exchanger assembly 4 have the same structure, all including a heat exchanger core frame 10. The heat exchanger core frame 10 is made of aluminum alloy profiles and has several spiral heat exchanger tubes 11 embedded inside. The spiral heat exchanger tubes 11 are made of copper tubes, and their two ends are welded and fixed to the manifold 12. The manifold 12 is a cylindrical hollow tube with a quick-connect interface 13 on the outside for easy connection with the diversion pipe 8. The heat exchanger core frame 10 has guide plates 14 bolted to both sides. The guide plates 14 are made of plastic and have arc-shaped guide grooves 15 on their surface to guide the airflow along the spiral heat exchanger tubes 11 and reduce airflow resistance.

[0020] The spiral heat exchange tube 11 of the first-stage heat exchange component 2 has a diameter of 20 mm, the spiral heat exchange tube 11 of the second-stage heat exchange component 3 has a diameter of 15 mm, and the spiral heat exchange tube 11 of the third-stage heat exchange component 4 has a diameter of 11 mm. The spiral heat exchange tubes 11 of each stage of the heat exchange component are staggered, and the center-to-center distance between adjacent spiral heat exchange tubes 11 is 1.8 times the tube diameter. This design increases the heat exchange area by more than 30% in the same space through the gradient change of tube diameter and staggered distribution, while avoiding the formation of vortices in the airflow between the tubes and reducing wind resistance loss.

[0021] A variable frequency fan 16 is fixedly installed inside the air inlet cavity 5 by a bracket. A flow equalization net 17 is installed on the inner side wall of the air inlet cavity 5 by a clip. The surface of the flow equalization net 17 is evenly provided with several circular ventilation holes, which can make the airflow delivered by the variable frequency fan 16 evenly distributed and avoid local airflow being too strong or too weak. A temperature sensor 18 is installed inside the air outlet cavity 6 by a bracket. The temperature sensor 18 is electrically connected to the control panel 9, which can detect the outlet air temperature in real time and feed the data back to the control panel 9 to realize closed-loop control of heat exchange temperature.

[0022] An electromagnetic regulating valve 19 is installed on the diversion pipe 8 via a flange. The electromagnetic regulating valve 19 is electrically connected to the control panel 9 and can precisely adjust the medium flow rate of each stage of the heat exchange components according to the heat exchange requirements. The medium circulation pump group 7 includes a high-temperature circulation pump 20 and a low-temperature circulation pump 21. The high-temperature circulation pump 20 is connected to the first-stage heat exchange component 2 through the diversion pipe 8 and is responsible for transporting the high-temperature heat exchange medium. The low-temperature circulation pump 21 is connected to the second-stage heat exchange component 3 and the third-stage heat exchange component 4 through the diversion pipe 8 and is responsible for transporting the low-temperature heat exchange medium, thereby realizing the separate circulation of high and low temperature media and improving heat exchange efficiency.

[0023] In actual operation, the control panel 9 starts the variable frequency fan 16 and the medium circulation pump group 7 according to the set temperature. After the outside air is evenly distributed by the flow equalization net 17 of the air inlet cavity 5, it flows through the three-stage heat exchange assembly 4, the two-stage heat exchange assembly 3, and the one-stage heat exchange assembly 2 in sequence, and exchanges heat with the medium in the spiral heat exchange tubes 11 of each stage. The high-temperature circulation pump 20 sends the high-temperature medium into the one-stage heat exchange assembly 2, and exchanges heat efficiently with the air that has been preheated by the first two stages. The low-temperature circulation pump 21 sends the low-temperature medium into the two-stage and three-stage heat exchange assemblies 4, and gradually absorbs the low-grade heat energy in the air. The temperature sensor 18 of the air outlet cavity 6 provides real-time feedback on the air outlet temperature. The control panel 9 adjusts the opening of the electromagnetic regulating valve 19 and the speed of the variable frequency fan 16 according to the feedback data to ensure stable heat exchange effect.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An air source heat pump device with a multi-layer heat exchange structure, characterized in that: The device includes a heat pump main unit casing. Inside the heat pump main unit casing, from top to bottom, a primary heat exchange component, a secondary heat exchange component, and a tertiary heat exchange component are arranged sequentially. An air inlet chamber is installed on one side of the heat pump main unit casing, and an air outlet chamber is installed on the other side. A medium circulation pump unit is installed at the bottom of the heat pump main unit casing. The medium circulation pump unit is connected to the primary heat exchange component, the secondary heat exchange component, and the tertiary heat exchange component through a distribution pipe. An electromagnetic regulating valve is installed on the distribution pipe. A control panel is installed on the outside of the heat pump main unit casing. The control panel is electrically connected to the medium circulation pump unit and the electromagnetic regulating valve.

2. The air source heat pump device with a multi-layer heat exchange structure according to claim 1, characterized in that: The primary heat exchange assembly, the secondary heat exchange assembly, and the tertiary heat exchange assembly have the same structure, all including a heat exchange core frame. Several spiral heat exchange tubes are embedded inside the heat exchange core frame. Both ends of the spiral heat exchange tubes are connected to a manifold. A quick-connect interface is provided on the outside of the manifold. Guide plates are installed on both sides of the heat exchange core frame, and arc-shaped guide grooves are formed on the surface of the guide plates.

3. An air source heat pump device with a multi-layer heat exchange structure according to claim 2, characterized in that: The diameter of the spiral heat exchange tube in the first-stage heat exchange assembly is 18-22 mm, the diameter of the spiral heat exchange tube in the second-stage heat exchange assembly is 14-16 mm, and the diameter of the spiral heat exchange tube in the third-stage heat exchange assembly is 10-12 mm. The spiral heat exchange tubes are arranged in a staggered pattern, and the center-to-center distance between adjacent spiral heat exchange tubes is 1.5-2 times the tube diameter.

4. An air source heat pump device with a multi-layer heat exchange structure according to claim 3, characterized in that: A variable frequency fan is installed inside the air inlet cavity. A flow equalization mesh is provided on the inner side wall of the air inlet cavity. Several circular ventilation holes are evenly opened on the surface of the flow equalization mesh. A temperature sensor is installed inside the air outlet cavity. The temperature sensor is electrically connected to the control panel.

5. An air source heat pump device with a multi-layer heat exchange structure according to claim 4, characterized in that: The medium circulation pump group includes a high-temperature circulation pump and a low-temperature circulation pump. The high-temperature circulation pump is connected to the first-stage heat exchange component through the diversion pipe, and the low-temperature circulation pump is connected to the second-stage heat exchange component and the third-stage heat exchange component through the diversion pipe.

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