Heat exchanger and heat exchange system

Abstract

The utility model relates to the field of heat exchange equipment, in particular to a heat exchanger and a heat exchange system, which comprise a coil pipe group and a refrigerant pipe group, the coil pipe group comprises a plurality of coil pipes, the plurality of coil pipes are communicated with a main fluid pipeline in parallel and are sequentially coiled from inside to outside, the refrigerant pipe group comprises a plurality of refrigerant pipes, and the refrigerant pipes are communicated with the coil pipes. A plurality of refrigerant pipes are connected in parallel and communicated with the main refrigerant pipeline, and the refrigerant pipes are evenly wound on the outer surface of the coil pipe. According to the heat exchanger, the heat exchange efficiency of the heat exchanger can be improved, and meanwhile pressure loss of a heat exchange system is reduced.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment, in particular to a heat exchanger and a heat exchange system. Background Art

[0002] A heat pump is a highly efficient energy-saving device that makes full use of low-grade thermal energy. Heat can be transferred spontaneously from a high-temperature object to a low-temperature object, but cannot spontaneously proceed in the opposite direction. The working principle of a heat pump is to force heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. It only consumes a small amount of reverse cycle net work to obtain a larger amount of heating, and can effectively utilize low-grade thermal energy that is difficult to use to achieve energy-saving purposes.

[0003] The water-cooled heat exchanger is one of the key components of a heat pump and plays a vital role in its operation. Its main function is to condense the high-temperature, high-pressure vapor refrigerant gas in the heat pump system into liquid and transfer the heat released during the condensation process to the water.

[0004] Existing water-cooled heat exchangers generally use single-channel water pipes and refrigerant pipes to achieve heat exchange between high-temperature and high-pressure steam refrigerant gas and water. Their heat exchange area is small and the heat exchange efficiency is low. In addition, the flow rate of the single-channel pipe is too high, and the pressure loss increases in a square relationship with the flow rate, which significantly increases the power consumption and cost of the water pump, fails to achieve sufficient heat exchange, and also reduces economic benefits. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to overcome the defects or shortcomings of the prior art and provide a heat exchanger whose structure can improve the heat exchange efficiency of the heat exchanger while reducing the pressure loss of the system.

[0006] The utility model is realized through the following technical solutions: a heat exchanger, including a coil group and a refrigerant pipe group, the coil group includes a plurality of coils, the plurality of coils are connected in parallel to the main fluid pipeline, and are arranged in a coiled manner from the inside to the outside, the refrigerant pipe group includes a plurality of refrigerant pipes, the plurality of refrigerant pipes are connected in parallel to the main refrigerant pipeline, and the refrigerant pipes are evenly wound around the outer surface of the coil.

[0007] Compared with the existing technology, the heat exchanger provided by the present invention increases the circulation area of ​​the fluid and the refrigerant, reduces the flow rate and resistance of the fluid and the refrigerant, and reduces the pressure loss of the fluid pipeline and the refrigerant pipeline through the design of several coils connected in parallel to the main fluid pipeline and several refrigerant pipes connected in parallel to the main refrigerant pipeline. At the same time, it can enable the fluid and the refrigerant to fully exchange heat and improve the heat exchange efficiency; the design of multiple coils and multiple refrigerant pipes in contact with each other increases the heat exchange area of ​​the fluid pipeline and the refrigerant pipeline, further improving the heat exchange efficiency.

[0008] Furthermore, the coil assembly includes at least a first coil and a second coil. The first coil and the second coil are connected in parallel to the main water pipeline, and the second coil is coiled around the periphery of the first coil. Thus, the nested coil assembly design helps maximize the coil surface area within a limited space, while also making the heat exchanger more compact and occupying less space.

[0009] Furthermore, a first gap is defined between the first and second coils, and the refrigerant pipe passes through the first gap and is wound around the outer surfaces of the first and second coils, respectively. Thus, the design of the first gap effectively utilizes the coil surface for heat transfer, while also helping to reduce mutual interference during heat transfer, thereby reducing heat loss.

[0010] Furthermore, the first and second coils are both vertically coiled, with a second gap defined between adjacent sections of the first and second coils. The refrigerant pipe passes through the second gap and is wound around the outer surfaces of the two adjacent sections. Thus, the gaps between the sections allow the refrigerant pipe to fully utilize the surface area of ​​the sections, improving heat exchange efficiency while preventing interference between the sections during heat transfer, which could lead to heat loss.

[0011] Furthermore, at least two refrigerant tubes are wound around the outer surface of each coil, and the refrigerant tubes on the outer surface of each coil are spaced apart. Thus, multiple refrigerant tubes are arranged on the coil for heat exchange, making heat exchange more efficient. At the same time, the multiple refrigerant tubes wound around the coil are appropriately spaced apart to prevent interference and mutual obstruction during heat transfer.

[0012] Furthermore, the refrigerant pipe extends in a spiral from one end of the coil to the other end of the coil. This makes the refrigerant pipe's path longer, fully utilizing the coil's outer surface area for heat exchange, and guides the refrigerant to form a more orderly flow state within the refrigerant pipe, reducing the occurrence of eddy currents and lowering the refrigerant's flow resistance.

[0013] Furthermore, the refrigerant tube is a capillary tube. Thus, the refrigerant tube adopts a capillary tube, which can achieve efficient heat exchange and ensure that the flow rate flowing through the refrigerant tube can remain stable under a certain pressure difference (the difference between the condensing pressure and the evaporating pressure).

[0014] The present utility model also provides a heat exchange system, including an evaporator, a compressor, a throttling device, a water tank assembly, a main refrigerant pipeline, a main fluid pipeline and the heat exchanger as described above, wherein the evaporator, compressor and throttling device are all arranged on the main refrigerant pipeline, and the two ends of the refrigerant pipe group are respectively connected to the compressor and the throttling device; the water tank assembly is arranged on the main fluid pipeline, the water tank assembly includes a water tank and a water pump, and the two ends of the coil group are respectively connected to the water tank and the water pump.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the heat exchanger provided by the utility model Figure 1 ;

[0017] Figure 2 Schematic diagram of the structure of the heat exchanger provided by the utility model Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the coil group in the heat exchanger provided by the utility model;

[0019] Figure 4 This is a schematic structural diagram of the refrigerant tube group in the heat exchanger provided by the present invention;

[0020] Figure 5 This is a working principle diagram of the heat exchange system provided by the utility model.

[0021] Figure markings: 10, evaporator; 20, compressor; 30, heat exchanger; 31, coil group; 311, first coil; 312, second coil; 313, pipe section; 314, first gap; 315, second gap; 32, refrigerant pipe group; 321, first refrigerant pipe; 322, second refrigerant pipe; 323, third refrigerant pipe; 324, fourth refrigerant pipe; 33, coil joint; 34, refrigerant pipe joint; 40, throttling device; 50, water tank assembly; 51, water tank; 52, water pump; 60, main fluid pipeline; 70, main refrigerant pipeline. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example 1:

[0024] See also Figures 1 to 4This embodiment provides a heat exchanger 30, including a coil group 31 and a refrigerant pipe group 32. The coil group 31 includes a plurality of coils, and the plurality of coils are connected in parallel to a main fluid pipeline (not shown in the figure) and are arranged in a coiled manner from the inside to the outside. The refrigerant pipe group 32 includes a plurality of refrigerant pipes, and the plurality of refrigerant pipes are connected in parallel to the main refrigerant pipeline (not shown in the figure), and the refrigerant pipes are evenly wound around the outer surface of the coil.

[0025] Therefore, the utility model increases the circulation area of ​​the fluid and the refrigerant, reduces the flow rate and resistance of the fluid and the refrigerant, and reduces the pressure loss of the water fluid pipeline and the refrigerant pipeline through the design of several coils connected in parallel to the main fluid pipeline and the design of several refrigerant pipes connected in parallel to the main refrigerant pipeline. At the same time, it can enable the fluid and the refrigerant to fully exchange heat and improve the heat exchange efficiency; the design of multiple coils and multiple refrigerant pipes in contact with each other increases the heat exchange area of ​​the fluid pipeline and the refrigerant pipeline, further improving the heat exchange efficiency.

[0026] In this embodiment, the fluid flowing in the main fluid pipeline is a coolant, specifically, water. Of course, in other alternative embodiments, the coolant is not limited to water and can be other coolants.

[0027] In this embodiment, the coil group 31 includes at least a first coil 311 and a second coil 312. The first coil 311 and the second coil 312 are connected in parallel with the main fluid pipeline, and the first coil 311 and the second coil 312 are both annularly coiled, and the second coil 312 surrounds the periphery of the first coil 311. Therefore, the coil group adopts an annular coiling and nested layout design to help maximize the surface area of ​​the coil within a limited space, while making the heat exchanger structure more compact and occupying less space. In this embodiment, the number of coils in the coil group is two. Of course, in other alternative embodiments, the number of coils in the coil group is not limited to two, and can be multiple.

[0028] Furthermore, a first gap 315 is defined between the first coil 311 and the second coil 312. The refrigerant pipe passes through the first gap 315 and is wound around the outer surfaces of the first coil 311 and the second coil 312, respectively. Thus, the design of the first gap effectively utilizes the coil surface for heat transfer, while also helping to reduce mutual interference during heat transfer, thereby reducing heat loss. Preferably, the refrigerant pipe is evenly distributed in the first gap along the extension direction of the coil. This effectively utilizes the space in the first gap to achieve heat exchange.

[0029] In this embodiment, the first and second coils 311, 312 are both coiled vertically. A second gap is defined between adjacent pipe segments 313 of each of the first and second coils 311, 312. The refrigerant pipes are routed through the second gaps and wound around the outer surfaces of the two adjacent pipe segments. Thus, the gaps between the pipe segments allow the refrigerant pipes to fully utilize the surface area of ​​the pipe segments, improving the heat exchange efficiency while preventing interference between the pipe segments during heat transfer, which could lead to heat loss. Preferably, the first and second coils are both rectangular in shape. This rectangular shape allows for a longer pipe length within a limited space, thereby increasing the heat exchange area. Of course, in alternative embodiments, the shape of the pipe segments is not limited to a rectangle and could be circular or elliptical. Preferably, the first and second coils are both integrally formed. Of course, in other alternative embodiments, the first and second coils can be designed as separate pieces, welded together or joined together by clamps. Preferably, the refrigerant pipes are evenly distributed within the second gaps along the extension of the coils. Thus, the space of the second gap can be effectively utilized to achieve heat exchange.

[0030] In this embodiment, at least two refrigerant tubes are wound around the outer surface of each coil, and the refrigerant tubes on the outer surface of each coil are spaced apart. Thus, multiple refrigerant tubes are arranged on the coil for heat exchange, making the heat exchange more efficient. At the same time, it is ensured that the multiple refrigerant tubes wound around the coil maintain appropriate spacing, do not interfere with each other, and avoid mutual obstruction during heat transfer. In this embodiment, the number of refrigerant tubes wound around the outer surface of each coil is two. Of course, in other alternative embodiments, the number of refrigerant tubes is not limited to two, and can be multiple.

[0031] Specifically, the refrigerant tube assembly 32 includes at least a first refrigerant tube 321, a second refrigerant tube 322, a third refrigerant tube 323, and a fourth refrigerant tube 324. Each of the first refrigerant tube 321, the second refrigerant tube 322, the third refrigerant tube 323, and the fourth refrigerant tube 324 is helical. The helical first refrigerant tube 321 and the second refrigerant tube 322 are symmetrically wound around the outer surface of the first coil 311, i.e., the first refrigerant tube 321 and the second refrigerant tube 322 are wound around each other in the same direction and at the same spacing on the outer surface of the first coil. Similarly, the third refrigerant tube 323 and the fourth refrigerant tube 324 are symmetrically wound around the outer surface of the second coil 312.

[0032] In this embodiment, the refrigerant pipe extends in a spiral from one end of the coil to the other end. This makes the refrigerant pipe's path longer, fully utilizing the coil's outer surface area for heat exchange, and guides the refrigerant into a more orderly flow state within the refrigerant pipe, reducing the occurrence of eddy currents and localized backflow, thereby lowering the refrigerant's flow resistance.

[0033] In this embodiment, a coil joint 33 is further included, and both ends of the plurality of coils are connected to the main water pipeline through the coil joint 40. Thus, through the coil joint 33, each coil is connected in parallel to the main water pipeline.

[0034] In this embodiment, a refrigerant pipe joint 34 is further included, through which both ends of the plurality of refrigerant pipes are connected to the main refrigerant pipeline. Thus, through the refrigerant pipe joint 34, each refrigerant pipe is connected in parallel to the main refrigerant pipeline.

[0035] In this embodiment, the refrigerant is CO2. Of course, in other alternative embodiments, the refrigerant can be R32 (difluoromethane), or R410A (a mixture of difluoromethane and pentafluoroethane), or R290 (propane), etc.

[0036] Preferably, the refrigerant tube is a capillary tube. Thus, the use of a capillary tube for the refrigerant tube allows for efficient heat exchange while ensuring that the flow rate through the refrigerant tube remains stable under a certain pressure differential (the difference between the condensing pressure and the evaporating pressure). Preferably, the capillary tube is made of copper. Of course, in other alternative embodiments, the capillary tube can be made of other metals such as stainless steel or aluminum.

[0037] Preferably, the coil is a copper tube. Thus, the use of copper, which has a high thermal conductivity, allows for faster heat transfer, further improving heat exchange efficiency. Of course, in other alternative embodiments, the copper tube can be made of other metals, such as stainless steel or aluminum.

[0038] Compared with the prior art, the heat exchanger provided by the present invention increases the circulation area of ​​the fluid and the refrigerant, reduces the flow rate and resistance of the fluid and the refrigerant, and reduces the pressure loss of the fluid and the refrigerant through the design of connecting several coils in parallel to the main fluid pipeline and several refrigerant pipes in parallel to the main refrigerant pipeline. At the same time, it can fully exchange heat between the fluid and the refrigerant, thereby improving the heat exchange efficiency. The design of multiple coils and multiple refrigerant pipes in contact with each other increases the heat exchange area between the fluid pipeline and the refrigerant pipeline, further improving the heat exchange efficiency. It should be noted that the heat exchanger provided by this embodiment can be applied to various heat exchange systems such as heat pump systems or heat exchange systems using water as a coolant, etc., for cooling or heating.

[0039] Example 2

[0040] See also Figure 5 This embodiment provides a heat exchange system, including an evaporator 10, a compressor 20, a throttling device 40, a water tank assembly 50, a main refrigerant pipeline 60, a main fluid pipeline 70, and a heat exchanger 30. The evaporator 10, compressor 20, and throttling device 40 are all disposed on the main refrigerant pipeline 70, and the two ends of the refrigerant pipe assembly 32 are respectively connected to the compressor 20 and the throttling device 40; the water tank assembly 50 is disposed on the main fluid pipeline 60, and includes a water tank 51 and a water pump 52. The two ends of the coil assembly 31 are respectively connected to the water tank 51 and the water pump 52. It should be noted that the evaporator, compressor, and water pump are all existing technologies and will not be described in detail here.

[0041] In this embodiment, the throttling device 40 is a throttling valve. Of course, in other alternative embodiments, the throttling device can be an electronic expansion valve or a thermal expansion valve.

[0042] For example, taking the refrigeration system for indoor refrigeration as an example, a refrigerant for circulating flow is provided in the main refrigerant pipeline, and water for circulating flow is provided in the main water pipeline. In the evaporator, water is used as a coolant and first exchanges heat with the refrigerant. The refrigerant evaporates and absorbs heat, which reduces the temperature of the water. The low-temperature water then exchanges heat with the indoor air, absorbing the heat of the indoor air. The evaporated gaseous refrigerant is sucked into the compressor and compressed into a high-temperature and high-pressure gaseous refrigerant inside the compressor. It then enters the heat exchanger and exchanges heat with the water through the pipe wall. Due to the high pressure inside the heat exchanger, the boiling point of the refrigerant also increases accordingly. Therefore, when the temperature of the water is lower than the boiling point of the refrigerant, the refrigerant will release heat and condense into a liquid. The released heat is transferred to the water, causing the water temperature to rise. The condensed liquid refrigerant is throttled and depressurized, so that its pressure and temperature are reduced, becoming a gas-liquid saturated state, and then enters the evaporator to be converted into a gaseous refrigerant, thus completing a refrigeration cycle.

[0043] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that, unless otherwise specified, "multiple" refers to two or more; the terms "first", "second", "third", etc. are only used to distinguish, and are not used to describe a specific order or sequence, nor can they be understood to indicate or imply relative importance. The term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0044] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that: It includes a coil group and a refrigerant pipe group. The coil group includes several coils, which are connected in parallel to the main fluid pipeline and are arranged in a coiled manner from the inside to the outside. The refrigerant pipe group includes several refrigerant pipes, which are connected in parallel to the main refrigerant pipeline and are evenly wound around the outer surface of the coil.

2. A heat exchanger according to claim 1, characterized in that: The coil group includes at least a first coil and a second coil. The first coil and the second coil are connected in parallel to the main water pipeline, and the second coil is coiled around the periphery of the first coil.

3. A heat exchanger according to claim 2, characterized in that: A first gap is defined between the first coil and the second coil, and the refrigerant pipe passes through the first gap and is respectively wound around the outer surfaces of the first coil and the second coil.

4. A heat exchanger according to claim 2, characterized in that: The first coil and the second coil are both coiled in a vertical direction. A second gap is provided between adjacent pipe sections of the first coil and the second coil. The refrigerant pipe passes through the second gap and is wound around the outer surfaces of the two adjacent pipe sections.

5. The heat exchanger according to claim 1, characterized in that: At least two refrigerant tubes are wound around the outer surface of each coil, and the refrigerant tubes on the outer surface of each coil are spaced apart.

6. The heat exchanger according to claim 1, characterized in that: The refrigerant pipe extends from one end of the coil to the other end of the coil along a spiral line.

7. The heat exchanger according to claim 1, characterized in that: The refrigerant tube is a capillary tube.

8. A heat exchange system, characterized in that: It includes an evaporator, a compressor, a throttling device, a water tank assembly, a main refrigerant pipeline, a main fluid pipeline and a heat exchanger according to any one of claims 1 to 7, wherein the evaporator, the compressor and the throttling device are all arranged on the main refrigerant pipeline, and the two ends of the refrigerant pipe group are respectively connected to the compressor and the throttling device; the water tank assembly is arranged on the main fluid pipeline, the water tank assembly includes a water tank and a water pump, and the two ends of the coil group are respectively connected to the water tank and the water pump.

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