Three-fluid heat exchanger

Abstract

The utility model discloses a three-fluid heat exchanger which comprises a component, fins, a collecting pipe A of fluid A, a connecting pipe A of the collecting pipe A, an end cover A of the collecting pipe A, a collecting pipe B of fluid B, a connecting pipe B of the collecting pipe B, an end cover B and the like, the flat component is provided with a plurality of layers of mutually isolated flow channels in the thickness direction, the collecting pipe B is arranged in the collecting pipe A, the two ends of the collecting pipe B are sealed through the end cover A and the end cover B respectively, and the connecting pipe B is connected with an inner cavity of the collecting pipe B; the connecting pipe A is connected with an inner cavity of the collecting pipe A to form collecting pipe suites, the components are evenly distributed between the collecting pipe suites on the two sides, the two ends of each component are inserted into the collecting pipe A and the collecting pipe B on the two sides respectively, at least one layer of flow channel is only communicated with an inner cavity of the collecting pipe B, the other flow channels are only communicated with the inner cavity of the collecting pipe A, and the fins are arranged in gaps between the adjacent components. According to the heat exchanger, the heat exchange heat resistance between fluids and the boundary dimension of the fluids are effectively reduced, the machining process is simplified, copper materials are avoided, and the cost is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of heat exchangers for heat pumps or refrigeration and air-conditioning systems, especially heat exchangers capable of realizing three-fluid heat exchange. Background Art

[0002] When people work and live indoors daily, they not only need a comfortable indoor environment but also domestic hot water for sanitation and cleaning. If a device can both adjust the indoor environment and produce hot water, it not only reduces the size and price of the device but also facilitates the comprehensive utilization of energy to achieve the purpose of energy conservation. Therefore, multifunctional machines that can refrigerate, heat, and produce hot water have a huge market demand. For this reason, Chinese Patent 202221896213.3 proposed a heat pump system with a tube-and-fin heat exchanger, inventing a tube-and-fin heat exchanger in which three fluids, namely a heat pump working fluid, water, and air, can exchange heat simultaneously: air passes over the fins outside the tube, and the working fluid and water can flow through the space between the tubes and the inner tube of the casing, effectively simplifying the system structure of the multifunctional machine, improving its performance and applicability. However, the above-mentioned tube-and-fin heat exchanger has a complex processing technology, there is still much room for improvement in heat exchange efficiency, and the large amount of copper used restricts the further reduction of its price. Summary of the Invention

[0003] The purpose of the present invention is to provide a fully aluminum three-fluid heat exchanger that is more suitable for welding processes to address the problems existing in the above-mentioned prior art. There are multiple flow channels inside the basic components of heat exchange. At least fluid A and fluid B can flow through different layers of flow channels respectively, and fluid C can flow through the outer surface of the component or the flow channel layer that has not been flowed through by fluid A and fluid B inside it, effectively reducing the thermal resistance of heat exchange between fluids A, B, and C, as well as the structural size of the heat exchanger, and significantly improving the efficiency of the heat exchanger. On the other hand, the heat exchanger can be made of fully aluminum material without using copper material, which is more suitable for one-time welding forming by brazing process, greatly simplifying the processing technology.

[0004] To achieve the above object, the technical solution is implemented as follows: A three-fluid heat exchanger, characterized in that: the heat exchanger includes member 1, fins 2, header A3 for fluid A and its connecting pipe A6 and end cap A7, header B4 for fluid B and its connecting pipe B5 and end cap B8, etc.; member 1 is flat, and a plurality of mutually isolated flow channels are arranged along its thickness direction and penetrate through member 1 along its length direction; header B4 is placed in header A3, and end cap A7 and end cap B8 respectively seal the two ends of header A3 and header B4, connecting pipe B5 passes through header A3 and is connected to the inner cavity of header B4, connecting pipe A6 is connected to the inner cavity of header A3 to form a header kit; two header kits are arranged on both sides, member 1 is evenly arranged between the two header kits, and the two ends of member 1 are appropriately processed and then inserted into header A3 and header B4 on both sides in the direction perpendicular to the header axis according to its width direction, ensuring that at least one flow channel is only connected to the inner cavity of header B4, and the remaining flow channels are only connected to the inner cavity of header A3, and fins 2 are placed in the gaps between adjacent members.

[0005] Further, in the three-fluid heat exchanger, member 1 can have two, three or multiple flow channels, and the cross-sectional area ratio of each flow channel to the maximum value among them is 0.3 - 1.0.

[0006] Further, in the three-fluid heat exchanger, several partitions arranged parallel to the flow channel length can be placed in each flow channel of member 1, or no partitions can be placed. When partitions are used, each flow channel of member 1 is divided into several small flow channels; when no partitions are placed, each flow channel of member 1 is an integral body.

[0007] Further, in the three-fluid heat exchanger, the heat exchanger is made of all-aluminum material and is integrally welded.

[0008] Further, in the three-fluid heat exchanger, fins 2 can be omitted, and the whole is placed in a closed housing 9 with fluid connecting pipe C10. By omitting fins 2, housing 9 and its internal partition 11 and connecting pipe C10 are added. Two header kits are arranged on both sides of housing 9, and internal partition 11 separates the two header kits on both sides of housing 9 to form independent closed housing spaces, and connecting pipe C10 is respectively connected to them. The two ends of member 1 are appropriately processed and then pass through internal partition 11 on both sides, and then inserted into header A3 and header B4 on both sides in the direction perpendicular to the header axis according to its width direction. At least one flow channel of member 1 passes through the pipe wall of header B4 and is connected to its inner cavity, another flow channel passes through the pipe wall of header A3 and its inner cavity, and another flow channel is only connected to the closed housing space where the header kit is located; the closed housing space between internal partitions 11 can be filled with heat storage materials or additional connecting pipes can be provided to introduce a fourth fluid.

[0009] Furthermore, the three-fluid heat exchanger with shell is characterized in that: the partition plate 11 inside the shell 9 can be omitted, and the two ends of the component 1 are inserted into the headers A3 and B4 on both sides in a direction perpendicular to the axis of the header in the width direction thereof, one layer of flow channel of the component 1 passes through the wall of the header B4 and is connected with its inner cavity, and the other layer of flow channel passes through the wall of the header A3 and is connected with its inner cavity.

[0010] Compared with the prior art, in the three-fluid heat exchanger designed by the utility model, fluids A, B and C flow through different flow channel layers or their outer surfaces in the heat exchange component respectively, and heat is exchanged only through the thin inner wall or outer wall of the component, which effectively reduces the heat exchange thermal resistance therebetween, and the efficiency of the heat exchanger is significantly improved and the structure is more compact; all the parts of the heat exchanger can be made of aluminum, which is suitable for brazing technology and can be formed in one time, effectively simplifying the processing technology, avoiding the use of copper materials, and significantly reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0012] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0013] Figure 2 Schematic diagram of cross section AA of a component of Example 1

[0014] Figure 3 It is a structural diagram of embodiment 2 of the present invention.

[0015] Figure 4 AA schematic diagram of the cross section of the component of the second embodiment

[0016] Figure 5 It is a structural diagram of embodiment 3 of the present invention.

[0017] Figure 6 Schematic diagram of cross section AA of the component of embodiment 3

[0018] Description of the numbers in the figure:

[0019] 1—component, 2—fin, 3—manifold A, 4—manifold B, 5—connecting pipe B, 6—connecting pipe A, 7—end cover A, 8—end cover B, 9—shell, 10—connecting pipe C, 11—inner partition, 101—first flow channel layer in the component, 102—second flow channel layer in the component, 103—third flow channel layer in the component. DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] refer to Figure 1, this embodiment is a three-fluid heat exchanger with working fluid, water, and air, etc. This heat exchanger includes component 1, fins 2, header A3 for fluid A and its connecting pipe A6 and end cap A7, header B4 for fluid B and its connecting pipe B5 and end cap B8, etc.; Component 1 is flat, and three flow channels are arranged along its thickness direction. As Figure 2 shown, the three flow channels are isolated from each other and each flow channel is composed of several sub-flow channels, and runs through component 1 along its length direction. Fluid A and fluid B are working fluid and water or solution respectively. Water flows through the middle flow channel 102 of component 1, while the working fluid flows through its inner and outer flow channels 101 and 103. The height ratio of flow channels 101, 102, and 103 is 0.5:1:0.5; Water header B4 is placed in working fluid header A3. End cap A7 and end cap B8 seal the two ends of header A3 and header B4 respectively. Connecting pipe B5 passes through header A3 and connects to the inner cavity of header B4. Connecting pipe A6 connects to the inner cavity of header A3 and forms a header kit; Two header kits are placed on both sides, and component 1 is evenly arranged between the two header kits. The two ends of component 1 are inserted into header A3 and header B4 on both sides respectively in the direction perpendicular to the header axis according to its width direction. The two ends of component 1 are moderately processed. The 102 flow channel passes through the pipe wall of header B4 and communicates with its inner cavity. The 101 layer and 103 layer flow channels pass through the pipe wall of header A3 and communicate with its inner cavity, and do not communicate with header B4; Fins 2 are placed in the gaps between adjacent components. Air flows through the outer surfaces of component 1 and fins 2. The whole heat exchanger is brazed into a whole.

[0022] When the heat pump system works, the working fluid enters the heat exchanger through connecting pipe A6 on the two-side header kits, flows through the 101 layer and 103 layer flow channels of component 1, and then flows out of the heat exchanger; Similarly, water enters the heat exchanger through connecting pipe B5 on the two-side header kits, flows through the 102 layer flow channel of component 1, and then flows out of the heat exchanger; Air flows through the outer surfaces of component 1 and fins 2 driven by a fan. In this way, according to the requirements of the heat pump system, the heat exchanger can realize heat exchange modes such as simultaneous heat exchange between the working fluid and water and air, heat exchange between the working fluid and water only, and heat exchange between the working fluid and air only.

[0023] Embodiment Two

[0024] Reference Figure 3 , this embodiment is a three-fluid heat exchanger with working fluid, water, and water, etc. Compared with Embodiment One,

[0025] its main difference is that: Component 1 is flat, and three flow channels are arranged along its thickness direction. As Figure 4As shown in the figure, the three-layer flow channels are isolated from each other, and each layer is an integral flow channel, running through component 1 along its length direction; fluid A is the working medium, and fluids B and C are liquid heat carriers for heat and cold, fin 2 is omitted, and shell 9 and its internal partition 11 and connecting pipe C10 are added. Two header assemblies are arranged on both sides of shell 9. The internal partition 11 separates the two header assemblies on both sides of shell 9 respectively, forming an independent sealed shell space, and the connecting pipe C10 is connected to it respectively. After both ends of component 1 pass through the internal partitions 11 on both sides, they are inserted into header A3 and header B4 on both sides in the direction perpendicular to the header axis according to its width direction. Both ends of component 1 are appropriately processed. The 101-layer flow channel passes through the wall of header B4 and communicates with its inner cavity. The 102-layer flow channel passes through the wall of header A3 and communicates with its inner cavity, and is not connected to header B4. The 103-layer flow channel is only connected to the sealed shell space where the header assembly is located and is isolated from the header assembly; the sealed shell space between the internal partitions 11 can be filled with heat storage materials, or a connecting pipe can be added to introduce a fourth fluid.

[0026] When the heat pump system works, the working medium enters the heat exchanger through the connecting pipe A6 on the two-side header assemblies, flows through the 102-layer flow channel of component 1, and then flows out of the heat exchanger; similarly, fluid B enters the heat exchanger through the connecting pipe B5 on the two-side header assemblies, flows through the 101-layer flow channel of component 1, and then flows out of the heat exchanger. Fluid C enters the heat exchanger through the connecting pipe C10 on shell 9, flows through the 103-layer flow channel of component 1, and then flows out of the heat exchanger. In this way, according to the requirements of the heat pump system, the heat exchanger can realize heat exchange modes such as simultaneous heat exchange between the working medium and fluids B and C, heat exchange between the working medium and fluid B only, and heat exchange between the working medium and fluid C only. When the sealed shell space between the internal partitions 11 is filled with heat storage materials, heat and cold can also be stored according to needs.

[0027] Embodiment 3

[0028] Reference Figure 5 , this embodiment is a three-fluid heat exchanger in which the working medium and two liquids can exchange heat with each other. Compared with Embodiment 2, two-layer flow channels are arranged along the thickness direction of component 1, as Figure 6 shown, the two-layer flow channels are isolated from each other and run through component 1 along its length direction; the internal partition 11 is omitted in shell 9; both ends of component 1 are inserted into header A3 and header B4 on both sides in the direction perpendicular to the header axis according to its width direction. Both ends of component 1 are appropriately processed. The 102-layer flow channel passes through the wall of header B4 and communicates with its inner cavity. The 101-layer flow channel passes through the wall of header A3 and communicates with its inner cavity, and is not connected to header B4.

[0029] When the heat pump system operates, the working fluid enters the heat exchanger through the connecting pipe A6 on the two-side header kit, flows through the laminar flow channels of the component 1101, and then flows out of the heat exchanger; similarly, the fluid B enters the heat exchanger through the connecting pipe B5 on the two-side header kit, flows through the laminar flow channels of the component 1102, and then flows out of the heat exchanger, and the fluid C enters the heat exchanger through the connecting pipe C10 on the housing 9, flows through the outer surface of the component 1, and then flows out of the heat exchanger. In this way, according to the requirements of the heat pump system, the heat exchanger can achieve heat exchange modes such as simultaneous heat exchange between the working fluid and the fluids B and C, heat exchange between the working fluid and only the fluid B, heat exchange between the working fluid and only the fluid C, and heat exchange between only the fluids B and C.

Claims

1. A three-fluid heat exchanger, characterized in that: The invention comprises a component (1), fins (2), a manifold A (3) for fluid A and its connecting pipe A (6) and end caps A (7), and a manifold B (4) for fluid B and its connecting pipe B (5) and end caps B (8); the component (1) is flat, and a plurality of mutually isolated flow channels are arranged along its thickness direction, and the flow channels are arranged along the length direction of the component (1) and penetrate the component (1); the manifold B (4) is arranged in the manifold A (3), and the end caps A (7) and B (8) respectively seal the two ends of the manifold A (3) and the manifold B (4); the connecting pipe B (5) passes through the manifold A ( 3) is connected to the inner cavity of the manifold B (4), and the connecting pipe A (6) is connected to the inner cavity of the manifold A (3), so as to form a manifold set; the two manifold sets are respectively arranged on both sides of the component (1), and the component (1) is evenly arranged between the two manifold sets. After processing, the two ends of the component (1) are respectively inserted into the manifolds A (3) and manifolds B (4) on both sides in a direction perpendicular to the axis of the manifold in the width direction thereof, so as to ensure that at least one layer of flow channels is only connected to the inner cavity of the manifold B (4), and the remaining flow channels are only connected to the inner cavity of the manifold A (3); the fins (2) are placed in the gaps between adjacent components (1).

2. A three-fluid heat exchanger according to claim 1, characterized in that: The component (1) is a two-layer, three-layer or multi-layer flow channel, and the ratio of the cross-sectional area of ​​each layer of the flow channel to the maximum value thereof is 0.3 to 1.

0.

3. A three-fluid heat exchanger according to claim 1, characterized in that: Each layer of the flow channel of the component (1) is built with a plurality of partitions arranged in parallel along the length of the flow channel, or no partition is built in.

4. A three-fluid heat exchanger according to claim 1, characterized in that: The three-fluid heat exchanger is made of all-aluminum material.

5. The three-fluid heat exchanger according to claim 1, characterized in that: The heat exchanger can omit the fins (2), and add a shell (9) and its inner partition (11) and a pipe C (10), and the whole is placed in a shell (9) with a fluid pipe C (10) that is sealed; two header sets are placed on both sides of the shell (9), and the inner partition (11) isolates the two header sets on both sides of the shell (9) to form independent sealed shell spaces, and the pipes C (10) are respectively connected to them. After processing, the two ends of the component (1) pass through the inner partitions (11) on both sides, and then are inserted into the headers A (3) and headers B (4) on both sides in a direction perpendicular to the axis of the headers in the width direction. At least one layer of flow channel of the component (1) passes through the tube wall of the header B (4) and is connected to its inner cavity, another layer of flow channel passes through the tube wall of the header A (3) and is connected to its inner cavity, and another layer of flow channel is only connected to the sealed shell space where the header set is located.

6. A three-fluid heat exchanger according to claim 5, characterized in that: The sealed shell space between the inner partitions (11) is filled with heat storage material, or a pipe is added to introduce a fourth fluid.

7. A three-fluid heat exchanger according to claim 5, characterized in that: The inner partition (11) is omitted, and the two ends of the component (1) are inserted into the headers A (3) and B (4) on both sides in a direction perpendicular to the axis of the header in the width direction; one layer of flow channel of the component (1) passes through the wall of the header B (4) and is connected to its inner cavity, and the other layer of flow channel passes through the wall of the header A (3) and is connected to its inner cavity.

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