A heat exchange device and a heat pump system having the same.

Abstract

This utility model relates to the field of temperature control equipment technology, and discloses a heat exchange device and a heat pump system therein. The heat exchange device includes: a heat exchange mounting component, which is a hollow structure, with a fluid inlet and a fluid outlet; and a pair of medium pipes installed within the inner cavity of the heat exchange mounting component. The medium pipes extend in a spiral shape, are arranged alternately, and a flow gap is reserved between them. One end of each medium pipe has a medium inlet, and the other end has a medium outlet, both extending outside the heat exchange mounting component. When the first fluid enters the inner cavity of the heat exchange mounting component, it is disturbed by the spiral medium pipes and the flow gap, which increases the turbulence of the first fluid within the inner cavity of the heat exchange mounting component. Simultaneously, the first fluid completely envelops the medium pipes, increasing the effective surface area available for heat exchange on the medium pipes, thereby improving the overall heat exchange efficiency of the heat exchange device.

Description

Technical Field

[0001] This utility model relates to the field of temperature control equipment technology, specifically to a heat exchange device and a heat pump system having the same. Background Technology

[0002] In overseas swimming pool heat pump systems, the heat exchanger is the core component for achieving efficient heat transfer between the refrigerant side and the pool water side. Its performance directly affects the overall system's energy efficiency, reliability, and operating costs. Since pool water typically contains chloride ions or other corrosive substances, especially in coastal or seawater pool environments, the water-side materials of the heat exchanger must possess excellent corrosion resistance. Titanium, due to its superior corrosion resistance, is an ideal material for manufacturing the water-side piping of such heat exchangers.

[0003] In existing pool heat pump systems, titanium tube heat exchangers generally employ a design where the refrigerant inlet and outlet are arranged in the same direction. The refrigerant path on the refrigerant side is typically single-inlet and single-outlet, with the flow direction being the same as or nearly parallel to the water path. Furthermore, the heat exchange elements often use single-turn spiral titanium threaded tubes, the diameter of which is limited by the heat exchanger cylinder size, resulting in a limited effective heat exchange area. Additionally, the water flow channels between the tubes are relatively fixed, leading to a low overall heat transfer coefficient for the heat exchanger. Utility Model Content

[0004] In view of this, the present invention provides a heat exchange device and a heat pump system thereon to solve the problem of low heat exchange efficiency of titanium tube heat exchangers in the prior art.

[0005] In a first aspect, this utility model provides a heat exchange device, comprising:

[0006] A heat exchange mounting component, which is a hollow structure, is provided with a fluid inlet and a fluid outlet;

[0007] A medium tube is provided in pairs. The medium tubes are installed in the inner cavity of the heat exchange mounting component. The medium tubes extend in a spiral shape. The pair of medium tubes are arranged alternately, and a flow gap is reserved between the pair of medium tubes. One end of the medium tube is provided with a medium inlet, and the other end is provided with a medium outlet. Both the medium inlet and the medium outlet extend to the outside of the heat exchange mounting component.

[0008] When the heat exchanger is working, the first fluid enters the inner cavity of the heat exchanger mounting component through the fluid inlet on the mounting component. It flows through the flow gap between a pair of staggered spiral medium tubes, completely enveloping the medium tubes, and finally flows out from the fluid outlet. Simultaneously, the second fluid splits into two paths, flowing in through the medium inlets of the pair of medium tubes respectively. It flows within its own independent spiral flow path, passing through the inside of the medium tubes and exchanging heat with the first fluid in the inner cavity of the heat exchanger mounting component through the tube walls. The second fluid, after heat exchange, flows out through the medium outlets of the pair of medium tubes. By installing a pair of staggered, spirally extending medium tubes in the inner cavity of the heat exchanger mounting component, and leaving a flow gap between the medium tubes, the first fluid, upon entering the inner cavity, is disturbed by the spiral medium tubes and the flow gap. This increases the turbulence of the first fluid within the inner cavity of the heat exchanger mounting component, and the turbulence can penetrate into the flow gap, allowing the first fluid to completely envelop the medium tubes. This increases the effective surface area of ​​the medium tubes available for heat exchange, thereby improving the overall heat exchange efficiency of the heat exchanger.

[0009] In one optional embodiment, an inlet tee is further included, wherein the medium inlets of the pair of medium tubes are respectively connected to the two output ports of the inlet tee;

[0010] And / or, it also includes an outlet tee, wherein the media outlets of the pair of media tubes are respectively connected to the two inlets of the outlet tee.

[0011] After the second fluid enters through the inlet tee, it is evenly distributed to the two medium pipes. After heat exchange is completed, the fluid discharged from the medium outlet merges and is discharged through the outlet tee. By connecting the two medium pipes in parallel, the flow rate of the second fluid flowing into the heat exchange device per unit time is increased, thereby improving the heat exchange efficiency of the device.

[0012] In one alternative embodiment, a connecting pipe is provided between the medium outlet of one of the medium tubes and the medium inlet of the other medium tube.

[0013] After the first medium pipe completes heat exchange, the second fluid enters the second medium pipe through the connecting pipe for secondary heat exchange. By connecting the two medium pipes in series, the cooling path of the second fluid is extended, enhancing the cooling effect. At the same time, the T-joint is eliminated, welding points are reduced, and manufacturing costs and leakage risks are lowered.

[0014] In one optional embodiment, the medium pipe is a threaded pipe, and a pair of threaded ribs on the outer surface of the threaded pipe abut against each other to form the flow gap. The contact support of the threaded ribs stabilizes the gap, and the water flowing through the gap is disturbed by the threaded ribs to generate turbulence, which increases the heat transfer efficiency between the pipe wall and the water flow. At the same time, the threaded pipe increases the effective heat exchange area, thereby increasing the heat exchange effect.

[0015] In one optional embodiment, the heat exchange mounting component includes an outer mounting cylinder and a pair of top cover assemblies. The pair of top cover assemblies seal both ends of the outer mounting cylinder, and the medium inlet and the medium outlet are respectively disposed through the two top cover assemblies. By fixing the medium pipe to the medium inlet and the medium outlet respectively with the two top cover assemblies, bidirectional mechanical fixation is provided, enhancing the overall stability of the heat exchange device, effectively resisting vibrations during transportation and operation, and preventing displacement of the medium pipe within the inner cavity of the heat exchange mounting component.

[0016] In one optional embodiment, the fluid inlet is located on one of the top cover assemblies, and the fluid outlet is located on the other of the top cover assemblies. This allows the first fluid to enter from one top cover assembly, undergo heat exchange, and then exit from the other top cover assembly, ensuring that the first fluid flows a longer path within the inner cavity of the heat exchange mounting component, thereby improving heat transfer capacity and enhancing heat exchange performance.

[0017] In one optional embodiment, an inner mounting cylinder is further included, with the medium tube spirally wound around its outer edge. The inner mounting cylinder provides stable support for the medium tube, preventing damage from vibration. Simultaneously, the inner mounting cylinder also restricts the space within the spiral inner ring of the medium tube, increasing the contact heat exchange area between the first and second fluids and improving heat exchange performance.

[0018] In one optional embodiment, the fluid inlet and the medium inlet are located at opposite ends of the heat exchange mounting component; the fluid outlet and the medium outlet are located at opposite ends of the heat exchange mounting component.

[0019] The direction in which the first fluid flows from the fluid inlet to the fluid outlet is opposite to the direction in which the second fluid flows from the medium inlet to the medium outlet, thus creating a counter-current heat exchange between the first and second fluids, increasing the average heat transfer temperature difference, and improving the heat exchange efficiency.

[0020] In one alternative embodiment, the fluid inlet and the fluid outlet are located at opposite ends of the heat exchange mounting component.

[0021] Secondly, this utility model also provides a heat pump system having the heat exchange device described in this utility model.

[0022] Since heat pump systems include heat exchange devices and have the same effect as heat exchange devices, they will not be elaborated on here. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal structure of the heat exchange device provided in an embodiment of the present invention.

[0025] Figure 2 A perspective view of the heat exchange device provided in an embodiment of this utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the medium tube provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Outer cylinder; 2. Top cover assembly; 3. Inner cylinder; 4. Medium pipe; 5. Fluid inlet; 6. Fluid outlet; 7. Medium inlet; 8. Medium outlet. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a heat exchange device is provided for a swimming pool heat pump system, used to transfer heat between the refrigerant side and the water side to supply heat to the user end. The heat exchange device includes a heat exchange mounting component and a medium pipe 4 disposed in the inner cavity of the heat exchange mounting component.

[0031] The heat exchange mounting component is a hollow structure, with a fluid inlet 5 and a fluid outlet 6. A pair of medium pipes 4 are provided, installed within the inner cavity of the heat exchange mounting component. The medium pipes 4 extend in a spiral shape, and the pair of medium pipes 4 are arranged alternately, with a flow clearance reserved between them. One end of each medium pipe 4 has a medium inlet 7, and the other end has a medium outlet 8, both extending outside the heat exchange mounting component. The heat exchange mounting component serves as the outer shell structure of the heat exchange device, with the medium pipes 4 fixedly installed inside it.

[0032] When the heat exchange device is working, the first fluid enters the inner cavity of the heat exchange mounting component through the fluid inlet 5 on the heat exchange mounting component, flows through the flow gap between a pair of staggered spiral medium pipes 4, completely enveloping the medium pipes 4, and finally flows out from the fluid outlet 6. At the same time, the second fluid is divided into two paths, flowing in through the medium inlets 7 of the pair of medium pipes 4 respectively, flowing in their respective independent spiral flow paths, flowing through the inside of the medium pipes 4, and exchanging heat with the first fluid in the inner cavity of the heat exchange mounting component through the pipe walls of the medium pipes 4. After heat exchange, the second fluid flows out through the medium outlets 8 of the pair of medium pipes 4 respectively. By installing a pair of staggered and spirally extended medium pipes 4 in the inner cavity of the heat exchange mounting component, and leaving a flow gap between the medium pipes 4, the first fluid is disturbed by the spiral medium pipes 4 and the flow gap when it enters the inner cavity of the heat exchange mounting component. This can increase the turbulence of the first fluid in the inner cavity of the heat exchange mounting component, and the turbulence can enter the flow gap, so that the first fluid can completely wrap the medium pipes 4, which can increase the effective surface area of ​​the medium pipes 4 that can be used for heat exchange, thereby improving the overall heat exchange efficiency of the heat exchange device.

[0033] In this embodiment, the first fluid is pool water, and the second fluid is tetrafluoroethane as the cooling medium. In some other embodiments, the heat exchange device can be applied to other scenarios, and the first and second fluids can be replaced according to specific needs. The larger the diameter of the coil of the medium tube 4, the higher the heat exchange efficiency, but the diameter of the coil of the medium tube 4 should not exceed 70% of the diameter of the outer cylinder 1. Therefore, the medium tube 4 adopts a double outer ring staggered design, and the flow gap formed between the medium tubes 4 is 2-6mm, with the optimal value being 2mm, which is more conducive to water flow and heat exchange.

[0034] In one embodiment, the heat exchange mounting component includes an outer cylinder 1 and a pair of hemispherical top cover assemblies 2. The pair of top cover assemblies 2 seal both ends of the outer cylinder 1, and the medium inlet 7 and the medium outlet 8 are respectively disposed through the two top cover assemblies 2. The tight fit between the top cover assemblies 2 and the medium inlet 7 and the medium outlet 8 achieves bidirectional mechanical fixation of the medium pipe 4, enhancing the stability of the heat exchange device and enabling it to effectively resist vibration and impact during transportation and operation, thus preventing displacement of the medium pipe 4 within the inner cavity of the heat exchange mounting component.

[0035] The existing design, to ensure the unit's spatial structure and component installation, aligns the inlet and outlet of the titanium tube heat exchanger's refrigerant lines in the same direction, which is detrimental to heat exchange. The heat exchange device provided in this embodiment replaces the lower cover assembly with a top cover assembly 2, achieving a two-inlet, two-outlet refrigerant cooling medium flow. Furthermore, the cooling medium enters from the top and exits from the bottom, while the pool water enters from the bottom and exits from the top, creating a complete counter-current flow between the cooling medium and the pool water, thereby improving heat exchange efficiency.

[0036] Furthermore, the heat exchange mounting component also includes an inner mounting cylinder 3, with the medium pipe 4 spirally wound around the outside of the inner mounting cylinder 3. The inner mounting cylinder 3 provides stable support for the medium pipe 4, preventing vibration damage. At the same time, the inner mounting cylinder 3 also restricts the space of the inner spiral of the medium pipe 4, increasing the contact heat exchange area between the first fluid and the second fluid, and improving heat exchange performance.

[0037] In this embodiment, the fluid inlet 5 is located on one of the top cover assemblies 2, and the fluid outlet 6 is located on the other top cover assembly 2, so that the fluid inlet 5 and the fluid outlet 6 are located at opposite ends of the heat exchange mounting component. This allows the first fluid to enter from one top cover assembly 2, undergo heat exchange, and exit from the other top cover assembly 2, ensuring that the first fluid flows a longer path within the inner cavity of the heat exchange mounting component, thereby improving heat transfer capacity and enhancing heat exchange performance.

[0038] In one embodiment, the heat exchange device further includes an inlet tee and an outlet tee, with the medium inlets 7 of a pair of medium pipes 4 respectively connected to the two outlet ports of the inlet tee, and the medium outlets 8 of a pair of medium pipes 4 respectively connected to the two inlets of the outlet tee.

[0039] After the second fluid enters through the inlet tee, it is evenly distributed to the two medium pipes 4. After heat exchange is completed, the fluid discharged from the medium outlet 8 is merged and discharged through the outlet tee. By connecting the two medium pipes 4 in parallel, the flow rate of the second fluid flowing into the heat exchange device per unit time is increased, thereby improving the heat exchange efficiency of the device.

[0040] Both the inlet and outlet tees are made of copper Y-type tees, and the medium pipes 4 are made of titanium threaded pipes. The copper Y-type tees and titanium threaded pipes are welded together. In the dual-flow titanium tube heat exchanger, the medium inlet 7 and medium outlet 8 are both made of copper Y-type tees, merging the two flow paths into one. After being compressed by the system compressor, the high-temperature, high-pressure gaseous refrigerant is evenly distributed through the copper Y-type tees and enters the two medium pipes 4 from the two medium inlets 7 respectively. After exchanging heat with the pool water in the inner cavity of the heat exchanger assembly, the medium-temperature, high-pressure liquid refrigerant flows out and is evenly distributed through the other copper Y-type tee, flowing out from the medium outlet 8 into the next component. Meanwhile, the low-temperature pool water enters the inner cavity of the heat exchanger assembly from the fluid inlet 5 on the supply side, exchanges heat with the refrigerant side, and after its temperature rises, reaches the user side through the fluid outlet 6. The two medium pipes 4 are connected in parallel to evenly distribute the refrigerant to the two titanium tube flow paths for better matching with the unit.

[0041] In another embodiment, a connecting pipe is provided between the medium outlet 8 of one medium pipe 4 and the medium inlet 7 of the other medium pipe 4.

[0042] After the first medium pipe 4 completes heat exchange, the second fluid enters the second medium pipe 4 through the connecting pipe for secondary heat exchange. By connecting the two medium pipes 4 in series, the cooling path of the second fluid is extended, the cooling effect is enhanced, and the T-joint is eliminated, reducing welding points, manufacturing costs and leakage risks.

[0043] By adding a connecting pipe, the medium outlet 8 of one medium pipe 4 is connected to the medium inlet 7 of another medium pipe 4, forming a series connection between the two medium pipes 4 and the unit system piping. The refrigerant fluid enters one of the medium pipes 4 from the medium outlet 8, undergoes the first heat exchange, and then enters the other medium pipe 4 in series from the medium outlet 8 for the second heat exchange. Finally, it flows out from the medium outlet 8 of the latter medium pipe 4 into the next component. The flow pattern on the water side remains unchanged. This scheme does not require the addition of welding points for the T-junction connection, which greatly saves on process costs. While achieving full countercurrent heat exchange, the single-inlet and single-outlet method can extend the flow path of the refrigerant, which is beneficial for the heat exchanger to better match the whole system.

[0044] In this embodiment, the medium pipe 4 is a threaded pipe, and the threaded ribs on the outside of a pair of threaded pipes abut against each other to form a flow gap. The contact support of the threaded ribs keeps the gap stable. When the water flows through the gap, it is disturbed by the threaded ribs and generates turbulence, which increases the heat transfer efficiency between the pipe wall and the water flow. At the same time, the threaded pipe increases the effective heat exchange area and increases the heat exchange effect.

[0045] In this embodiment, fluid inlet 5 and medium inlet 7 are located at opposite ends of the heat exchange mounting component, and fluid outlet 6 and medium outlet 8 are located at opposite ends of the heat exchange mounting component. The direction in which the first fluid flows from fluid inlet 5 to fluid outlet 6 is opposite to the direction in which the second fluid flows from medium inlet 7 to medium outlet 8, thereby creating counter-current heat exchange between the first and second fluids, increasing the average heat transfer temperature difference, and improving heat exchange efficiency.

[0046] Furthermore, in order to facilitate the control of the pool water flow rate and thus the output temperature of the pool water, control valves are installed at both the fluid inlet 5 and the fluid outlet 6 to control the inflow and outflow of the pool water.

[0047] This embodiment proposes a double-outer-coil counter-flow titanium tube heat exchange device. The cold medium adopts a top-in, bottom-out configuration, forming a complete counter-flow between the pool water path and the cold medium path, which is beneficial for improving heat exchanger performance. Simultaneously, the pair of medium tubes 4, based on a full outer coil design, employ a double-outer-coil staggered design, which increases the effective heat exchange area, reduces refrigerant path resistance, and further enhances heat exchange efficiency.

[0048] The full counter-current design increases the average heat transfer temperature difference by 15-20%, while the double outer-ring threaded tubes increase the effective heat exchange area by 25%. The gaps between the tubes promote water flow turbulence, enhancing the heat exchange effect. Specifically, the parallel connection improves heat exchange efficiency by over 10%, and the series connection improves it by over 6%. The parallel connection ensures uniform refrigerant distribution in both flow paths, improving system stability; the series connection reduces welding points, lowers leakage risk, and facilitates compatibility with different unit systems. Both connection methods are adaptable to different unit systems; single-inlet / single-outlet systems require series connection, while flow matching requires parallel connection. The double outer-ring counter-current titanium tube heat exchanger proposed in this embodiment is suitable not only for freshwater swimming pools but also for swimming pools in coastal areas with high salinity or seawater swimming pools, demonstrating broad market application prospects.

[0049] According to an embodiment of this utility model, another aspect provides a heat pump system, specifically a swimming pool heat pump system, used for constant temperature heating in swimming pools, spas, and other similar venues. It absorbs heat energy from the air, water, or soil, converts it into high-temperature heat energy via a compressor to heat the pool water, meeting the requirements for maintaining water temperature in winter. The heat pump system includes the heat exchange device provided by this utility model. During operation, pool water is injected into the inner cavity through the fluid inlet 5 of the heat exchange mounting component, flows through the flow gap between two staggered spiral medium pipes 4, fully envelops the outer surface of the medium pipes 4 for heat exchange, and is discharged from the fluid outlet 6. Simultaneously, the cold medium is split into two independent flow paths, entering the pipes through the medium inlets 7 of the two medium pipes 4 respectively. During the flow along the spiral flow paths, it exchanges heat with the first fluid through the pipe walls and is finally output from the medium outlets 8 of the two medium pipes 4. Through the synergistic effect of the staggered spiral arrangement and the flow gap, the first fluid is disturbed by the spiral tube wall when flowing through the gap, generating high-intensity turbulence, which continuously renews the fluid boundary layer. At the same time, the spiral structure increases the effective heat exchange area of ​​the medium tube 4, which can improve the heat exchange efficiency and thus improve the operating efficiency of the heat pump system.

[0050] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heat exchange device, characterized in that, include: The heat exchange mounting component is a hollow structure, and the heat exchange mounting component is provided with a fluid inlet (5) and a fluid outlet (6); A medium pipe (4) is provided in pairs. The medium pipe (4) is installed in the inner cavity of the heat exchange mounting component. The medium pipe (4) extends in a spiral shape. The pair of medium pipes (4) are arranged alternately, and a flow gap is reserved between the pair of medium pipes (4). One end of the medium pipe (4) is provided with a medium inlet (7), and the other end is provided with a medium outlet (8). Both the medium inlet (7) and the medium outlet (8) extend to the outside of the heat exchange mounting component.

2. The heat exchange device according to claim 1, characterized in that, It also includes an inlet tee, wherein the medium inlets (7) of a pair of medium pipes (4) are respectively connected to the two outlets of the inlet tee; And / or, it also includes an outlet tee, wherein the media outlets (8) of a pair of media tubes (4) are respectively connected to the two inlets of the outlet tee.

3. The heat exchange device according to claim 1, characterized in that, A connecting pipe is provided between the medium outlet (8) of one of the medium pipes (4) and the medium inlet (7) of the other medium pipe (4).

4. The heat exchange device according to any one of claims 1 to 3, characterized in that, The medium tube (4) is a threaded tube, and a pair of threaded ribs on the outside of the threaded tube abut against each other to form the flow gap.

5. The heat exchange device according to any one of claims 1 to 3, characterized in that, The heat exchange installation includes an outer cylinder (1) and a pair of top cover assemblies (2). The pair of top cover assemblies (2) seal both ends of the outer cylinder (1). The medium inlet (7) and the medium outlet (8) are respectively disposed through the two top cover assemblies (2).

6. The heat exchange device according to claim 5, characterized in that, The fluid inlet (5) is located on one of the top cover assemblies (2), and the fluid outlet (6) is located on the other one. On the top cover assembly (2).

7. The heat exchange device according to any one of claims 1 to 3, characterized in that, It also includes an inner cylinder (3), and the medium pipe (4) is spirally wound around the outer side of the inner cylinder (3).

8. The heat exchange device according to any one of claims 1 to 3, characterized in that, The fluid inlet (5) and the medium inlet (7) are located at opposite ends of the heat exchanger assembly; the fluid outlet (6) and the medium outlet (8) are located at opposite ends of the heat exchanger assembly.

9. The heat exchange device according to claim 8, characterized in that, The fluid inlet (5) and the fluid outlet (6) are located at opposite ends of the heat exchange installation.

10. A heat pump system, characterized in that, The heat exchange device has any one of claims 1 to 9.

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