CN116379815A - Heat exchanger and electric appliance with same - Google Patents

Abstract

The present invention provides a heat exchanger and an electrical appliance thereof. The heat exchanger includes a heat exchange assembly, the heat exchange assembly has an inlet and an outlet, and the heat exchange assembly includes: a first plate-like structure; a second plate-like structure, and the second plate-like structure. A plate-shaped structure is connected with a first fluid channel between the two, and the inlet and outlet are respectively connected with the first fluid channel; the first side of the second plate-shaped structure forming the first fluid channel has a plurality of depressions and a plurality of The convex part, wherein, in the direction from the inlet to the outlet, the concave part and the convex part are arranged alternately. The heat exchanger of the present invention solves the problem of uneven temperature distribution of the flat heat exchanger in the prior art.

Description

Heat exchanger and its electrical appliance

technical field

The invention relates to the technical field of heat exchangers, in particular, to a heat exchanger and an electrical appliance having the same.

Background technique

A heat exchanger is a device used to transfer heat from a hot fluid to a cold fluid to meet specified requirements. Commonly used heat exchangers are mostly wall-type, including shell-and-tube heat exchangers, finned tube heat exchangers, plate heat exchangers, etc. For heat exchangers used in special occasions such as heat dissipation, ice making, heat preservation, and refrigeration, it is more appropriate to adopt a flat plate structure design. The inner side is a heat transfer fluid, and the outer side provides a flat cold or hot surface, and the heat exchange with the cold/heat source is realized through heat conduction.

At present, the prior art provides a flat radiator provided with a refrigerant conduit, and the low-temperature refrigerant in the refrigerant conduit provides a cold surface to realize heat dissipation of the heating element. The structure of this scheme is simple, but the uniformity of the overall temperature distribution of the plate is poor, and local overheating problems are prone to occur.

The prior art also provides a flat plate evaporator connected to a loop heat pipe, which provides a cold surface of the heat exchanger through the evaporation of the working fluid in the closed loop for heat dissipation of the heat-generating device. This solution needs to be equipped with a fan system for heat removal, which increases the installation space and cost, and the heat dissipation capacity is limited by the original working fluid charge, so it cannot be flexibly adjusted.

The prior art also provides a liquid-cooled flat-plate radiator, which improves the uniformity of the temperature distribution of the flat plate by arranging multiple partitions and differentiated cooling fins. The scheme has complex structure and high machining cost.

To sum up, the current plate heat exchanger has the problems of uneven temperature distribution and high processing cost.

Contents of the invention

The main purpose of the present invention is to provide a heat exchanger and an electrical appliance having the same, so as to solve the problem of uneven temperature distribution of the flat heat exchanger in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a heat exchanger is provided, including a heat exchange assembly, the heat exchange assembly has an inlet and an outlet, and the heat exchange assembly includes: a first plate structure; a second plate structure, It is connected with the first plate-shaped structure and has a first fluid channel between the two, and the inlet and outlet are respectively connected with the first fluid channel; the first side of the second plate-shaped structure forming the first fluid channel has a plurality of depressions and A plurality of raised parts, wherein, in the direction from the inlet to the outlet, the concave parts and the raised parts are arranged alternately; the first fluid channel has a first side wall and a second side wall oppositely arranged along the direction perpendicular to its extension; the second There is at least one baffle in a fluid channel, and the at least one baffle divides the first fluid channel into at least two channel sections, and the at least two channel sections are arranged in sequence along the extending direction of the first fluid channel; each baffle is There is a communication port between the first side wall or the second side wall.

Further, the recessed parts and the raised parts are arranged alternately along a first preset direction, wherein the inlet and outlet are arranged sequentially along a second preset direction, and the first preset direction is perpendicular to the second preset direction.

Further, some plate sections of the second plate-shaped structure protrude toward the direction of the first plate-shaped structure to form a raised portion; and/or, some plate sections of the second plate-shaped structure face a direction away from the first plate-shaped structure The recessed arrangement forms a recessed portion.

Further, the cross section of the protruding portion perpendicular to its protruding direction gradually decreases along its protruding direction; and/or, the cross section of the groove formed by the concave portion perpendicular to its concave direction gradually decreases along its concave direction .

Further, the projection of the protrusion on the first reference plane is at least one of semicircle, triangle, trapezoid and rhombus; wherein, the first reference plane is parallel to the protrusion direction of the protrusion; and/or The projection of the groove formed by the concave part on the second reference plane is at least one of semicircle, triangle, trapezoid and rhombus; wherein, the second reference plane is parallel to the concave direction of the concave part.

Further, when there are at least two baffles in the first fluid channel, there is a communication port between one of the two adjacent baffles and the first side wall, and one of the two adjacent baffles There is a communication port between the other deflection part and the second side wall.

Further, when there are at least two baffles in the first fluid channel; wherein, in the direction from the inlet to the outlet, the widths of at least two channel segments along the extending direction of the first fluid channel are equal; or, from the inlet to the outlet In the direction of the outlet, the widths of at least two channel segments along the extending direction of the first fluid channel gradually decrease; or, in the direction from the inlet to the outlet, the widths of at least two channel segments along the extending direction of the first fluid channel gradually decrease increase.

Further, some plate sections of the second plate-shaped structure protrude toward the direction of the first plate-shaped structure to form deflectors.

Further, the edge of the first plate-like structure is welded to the edge of the second plate-like structure; and/or at least one protrusion is welded to the first plate-like structure.

Further, the first plate-shaped structure is a flat plate, and the edge of the flat plate is connected to the edge of the second plate-shaped structure; or, the first plate-shaped structure includes a first main body plate segment and a first flange connected to the first main body plate segment , the first flange is arranged around the first main body plate segment; the second plate structure includes a second main body plate segment and a second flange connected with the second main body plate segment, and the second flange is arranged around the second main body plate segment; Wherein, the second main body plate section includes a plurality of recessed parts and a plurality of raised parts, the first fluid channel is located between the first main body plate section and the second main body plate section, and the first flange and the second flange are connected.

Further, the heat exchange assembly further includes: a third plate structure, the third plate structure and the first plate structure are arranged on opposite sides of the second plate structure, the third plate structure is connected to the second plate structure And there is a second fluid channel between them, and the second fluid channel communicates with the first fluid channel through the through hole on the second plate structure.

Further, the maximum thickness of the second plate structure is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

Further, the heat exchanger includes a plurality of heat exchange components, wherein: the plurality of heat exchange components are connected in sequence, so that the fluid passes through the plurality of heat exchange components in sequence; or the plurality of heat exchange components are arranged in parallel, so that the fluid flows through the Multiple heat exchange components.

According to another aspect of the present invention, an electrical appliance is provided, including a heat-exchanging element, and the electrical appliance further includes the above-mentioned heat exchanger, so that the heat exchanger exchanges heat with the heat-exchanging element.

Applying the technical solution of the present invention, the heat exchanger includes a heat exchange assembly, the heat exchange assembly has an inlet and an outlet, the heat exchange assembly includes a first plate structure and a second plate structure, and the second plate structure forms the first fluid channel. The first side has a plurality of depressions and a plurality of protrusions. The fluid flows into the first fluid channel from the inlet, and when it flows through the raised part, the flow direction of the fluid changes, so that the fluid forms a periodic and regular flow pattern of sudden expansion and contraction, so that fluids of different temperatures collide and mix, The mixing uniformity of each part of the fluid is guaranteed; when flowing through the concave part, the flow direction of the fluid changes, so that the fluid forms a return-shaped streamline and a local vortex in the normal direction, so that fluids of different temperatures collide and mix. The mixing uniformity of each part of the fluid is guaranteed; the alternately arranged concave parts and convex parts jointly disturb the flow of the fluid and change the flow direction of the fluid, so that the fluids of different temperatures are continuously mixed, thereby strengthening the internal mixing of the fluid and increasing the temperature distribution uniformity and heat transfer efficiency, thereby solving the problem of uneven temperature distribution of the plate heat exchanger in the prior art.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 shows a schematic diagram of an embodiment of a heat exchange assembly according to the present invention;

Fig. 2 shows a partially enlarged schematic diagram of an embodiment of a heat exchange assembly according to the present invention;

Fig. 3 shows a cross-sectional view of an embodiment of a heat exchange assembly according to the present invention;

Fig. 4 shows a schematic diagram of fluid flow according to an embodiment of the heat exchange assembly of the present invention;

Fig. 5 shows the sectional view at A-A place among Fig. 4;

Fig. 6 shows a cross-sectional view of another embodiment of the heat exchange assembly according to the present invention;

Fig. 7 shows a schematic diagram of another embodiment of the embodiment of the heat exchange assembly according to the present invention;

Fig. 8 shows a cross-sectional view of another embodiment of the heat exchange assembly according to the present invention;

Fig. 9 shows a schematic diagram of series connection of heat exchange components according to an embodiment of the heat exchanger of the present invention;

Fig. 10 shows a schematic diagram of parallel connection of heat exchange components according to an embodiment of the heat exchanger of the present invention;

Fig. 11 shows the schematic diagram of applying the heat exchanger according to the present invention to the pellet ice machine system;

Fig. 12 shows a schematic diagram of an ice making process in which a heat exchanger according to the present invention is applied to a pellet ice machine system;

Figure 13 shows a schematic diagram of the application of the heat exchanger according to the present invention to an air conditioning system;

Fig. 14 shows a schematic diagram of the application of the heat exchanger according to the present invention to a refrigeration/insulation box.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

1. Heat exchanger; 2. Pump; 3. Ice tray; 10. Heat exchange component; 11. Third plate structure; 20. First plate structure; 21. First main body plate section; 22. First turn side; 30, second plate structure; 31, recessed part; 32, raised part; 33, second main body plate segment; 34, second flanging; 40, first fluid channel; 41, baffle part; 42 . A channel segment; 50. A second fluid channel.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The present invention provides a heat exchanger, please refer to FIG. 1 to FIG. 14 , including a heat exchange assembly 10, the heat exchange assembly 10 has an inlet and an outlet, and the heat exchange assembly 10 includes: a first plate structure 20; a second plate structure The structure 30 is connected with the first plate-shaped structure 20 and has a first fluid channel 40 between the two, and the inlet and outlet are respectively connected with the first fluid channel 40; the second plate-shaped structure 30 forms the second channel of the first fluid channel 40 One side has a plurality of concave parts 31 and a plurality of convex parts 32, wherein, on the direction from the inlet to the outlet, the concave parts 31 and the convex parts 32 are arranged alternately, and the first fluid channel 40 has opposite along the direction perpendicular to its extension. The first side wall and the second side wall are provided; there is at least one baffle 41 in the first fluid channel 40, and at least one baffle 41 divides the first fluid channel 40 into at least two channel segments 42, at least two The channel segments 42 are sequentially arranged along the extending direction of the first fluid channel 40; each deflector 41 has a communication port with the first side wall or the second side wall.

The heat exchanger of the present invention includes a heat exchange assembly 10, the heat exchange assembly 10 has an inlet and an outlet, the heat exchange assembly 10 includes a first plate structure 20 and a second plate structure 30, and the second plate structure 30 forms the first fluid The first side of the channel 40 has a plurality of depressions 31 and a plurality of protrusions 32 . The fluid flows into the first fluid channel 40 from the inlet, and when it flows through the protrusion 32, the flow direction of the fluid changes, so that the fluid forms a periodic and regular flow pattern of sudden expansion and contraction, so that fluids of different temperatures collide and collide with each other. Mixing ensures the mixing uniformity of each part of the fluid; when flowing through the concave part, the flow direction of the fluid changes, so that the fluid forms a return-shaped streamline and a local vortex in the normal direction, causing collisions and collisions between fluids of different temperatures. Mixing ensures the mixing uniformity of each part of the fluid; the alternately arranged recessed parts 31 and raised parts 32 work together to disrupt the flow of the fluid and change the flow direction of the fluid, so that the various parts of the fluid at different temperatures are continuously mixed, thereby strengthening the fluid inside. Mixing improves temperature distribution uniformity and heat transfer efficiency, thereby solving the problem of uneven temperature distribution of the plate heat exchanger in the prior art.

Wherein, the first fluid channel 40 has a first side wall and a second side wall oppositely arranged along the direction perpendicular to its extension; there is at least one deflector 41 in the first fluid channel 40, and at least one deflector 41 divides the first The fluid channel 40 is divided into at least two channel segments 42, and the at least two channel segments 42 are sequentially arranged along the extending direction of the first fluid channel 40; each deflection part 41 has communication with the first side wall or the second side wall mouth. The deflection part 41 realizes the multi-flow reciprocating flow of the fluid, increases the flow velocity of the fluid, enhances the convective heat transfer coefficient of the heat exchanger, and improves the heat transfer efficiency of the heat exchanger.

Specifically, the flow direction of the fluid is the x direction, that is, the horizontal rightward direction as shown in FIG. 4 ; the normal direction is the vertical downward direction as shown in FIG. 5 , that is, the y direction.

In this embodiment, the concave parts 31 and the convex parts 32 are arranged alternately along the first preset direction, wherein the inlet and the outlet are arranged sequentially along the second preset direction, and the first preset direction is perpendicular to the second preset direction. . Such an arrangement makes the direction in which the concave parts 31 and the convex parts 32 are alternately arranged perpendicular to the flow direction of the fluid, so that the fluid in the same place is subjected to the turbulence effect of the concave parts 31 and the convex parts 32 at the same time, and part of the fluid forms again after being divided. Partial eddy currents are then merged into the main flow for the next diversion, which increases the frequency of flow direction changes, increases the chance of collision and mixing of fluids at different temperatures, further ensures the mixing uniformity of fluids at different temperatures, and improves heat transfer efficiency.

Specifically, the second preset direction is the horizontal direction as shown in FIG. 4 , that is, the above-mentioned x direction, and the first preset direction is the vertical direction as shown in FIG. 4 .

In this embodiment, part of the plate segments of the second plate structure 30 protrude toward the direction of the first plate structure 20 to form a raised portion 32; and/or, part of the plate segments of the second plate structure 30 face away from The direction of the first plate structure 20 is recessed to form a recessed portion 31 .

Specifically, the first fluid channel 40 is arranged between the second plate-shaped structure 30 and the first plate-shaped structure 20, and a part of the plate-shaped structure 30 protrudes toward the direction of the first plate-shaped structure 20 to form a convex structure. The rising portion 32, part of the plate segment of the second plate structure 30 is recessed toward the direction away from the first plate structure 20 to form a recess 31, so that the second plate structure 30 and the first plate structure 20 cooperate with each other to realize The three-dimensional shape of the first fluid channel 40 helps fluids at different temperatures to mix uniformly, improving the heat exchange efficiency of the heat exchanger.

Optionally, both the protruding portion 32 and the recessed portion 31 are formed by stamping.

Optionally, the cross section of the protruding portion 32 perpendicular to its protruding direction gradually decreases along its protruding direction; slowing shrieking. Such an arrangement acts as a flow guide for the fluid, changes the flow direction of the fluid, helps to enhance the turbulence effect of the raised portion 32 and the depressed portion 31 on the fluid, and fully mixes fluids of different temperatures.

Optionally, the projection of the raised portion 32 on the first reference plane is at least one of semicircle, triangle, trapezoid and rhombus; wherein, the first reference plane is parallel to the raised direction of the raised portion 32; And/or, the projection of the groove formed by the recess 31 on the second reference plane is at least one of semicircle, triangle, trapezoid and rhombus; wherein, the second reference plane is in the same direction as the recess direction of the recess 31 parallel. Such arrangement enables the shapes of the protruding portion 32 and the recessed portion 31 to be flexibly adjusted according to the actual production environment, thereby reducing production costs.

It should be noted that, when the projection is a semicircle, the convex portion 32 or the concave portion 31 is hemispherical; when the projection is a triangle, the convex portion 32 or the concave portion 31 is in the shape of a raindrop; The raised portion 32 or the depressed portion 31 is in the shape of a bubble; when projected as a rhombus, the raised portion 32 or the depressed portion 31 is in the shape of a shuttle.

Specifically, the second plate-like structure 30 forms the raised portion 32 and the depressed portion 31 on the first side of the first fluid channel 40, which may be uniformly distributed or non-uniformly distributed, and the uniform distribution has a higher degree of generalization. It is beneficial to reduce costs; non-uniform distribution allows users to carry out different designs according to the heat dissipation requirements of heat sources in different positions, and enhance the heat dissipation effect of the heat exchanger.

In this embodiment, when there are at least two baffles 41 in the first fluid channel 40, there is a communication port between one baffle 41 of the two adjacent baffles 41 and the first side wall. There is a communication port between the other deflector 41 of the two adjacent deflectors 41 and the second side wall.

During specific implementation, when the fluid flows through one of the two adjacent deflectors 41, the fluid flows along the direction from the second side wall to the first side wall, and from this deflector 41 to the first side wall The communication port flows into a channel section 42, and then flows through another baffle 41, the fluid flows along the direction from the first side wall to the second side wall, and from the communication between the other baffle 41 and the second side wall The inlet flows into the next channel section 42, and in this reciprocating cycle, the baffle part 41 realizes the multi-flow reciprocating flow of the fluid, that is, the fluid realizes a serpentine flow under the action of the baffle part 41, which increases the flow velocity of the fluid and enhances the exchange rate. The convective heat transfer coefficient of the heat exchanger provides the heat transfer efficiency of the heat exchanger. In addition, in order to take into account both heat exchange and pressure drop, the number of baffles 41 can be selected according to actual conditions.

In this embodiment, when there are at least two baffles 41 in the first fluid channel 40; wherein: in the direction from the inlet to the outlet, the width of at least two channel segments 42 along the extending direction of the first fluid channel 40 or, from the inlet to the outlet, the widths of at least two channel segments 42 along the extending direction of the first fluid channel 40 gradually decrease; or, from the inlet to the outlet, at least two channel segments 42 along the The width of the first fluid channel 40 in the extending direction gradually increases.

Specifically, when the fluid flows to overcome the internal friction and turbulence, the fluid particles collide with each other and exchange momentum to cause energy loss, which is manifested in the pressure difference between the front and rear of the fluid flow, that is, the pressure drop. The size of the pressure drop varies with the flow velocity. Variety. The larger the width of the channel section 42 is, the faster the flow velocity of the fluid is and the smaller the pressure drop of the fluid is. By changing the width of at least two channel segments 42 along the extending direction of the first fluid channel 40, compensation for pressure drop is realized, so as to take into account both heat exchange and pressure drop.

During specific implementation, for a single-phase medium that does not undergo a phase change during the flow process, the pressure drop does not increase significantly, and in the direction from the inlet to the outlet, the widths of at least two channel segments 42 along the extending direction of the first fluid channel 40 are equal ; For a medium that undergoes a phase change during the flow process, the dryness of the fluid increases or decreases, the flow velocity slows down or speeds up, and the pressure drop changes significantly. In order to avoid excessive or too small pressure drop affecting the efficiency or As the pump works, in the direction from the inlet to the outlet, the widths of at least two channel segments 42 gradually increase or decrease along the extending direction of the first fluid channel 40 .

In this embodiment, some plate segments of the second plate structure 30 protrude toward the direction of the first plate structure 20 to form deflectors 41 .

Specifically, the baffle 41 is stamped and formed, the second plate structure 30 can be welded to the first plate structure 20 through the baffle 41, and the second plate structure 30 provided with the baffle 41 can be integrally formed without By increasing the process steps, the welding strength of the second plate structure 30 can be enhanced without increasing the production cost.

In this embodiment, the edge of the first plate structure 20 is welded to the edge of the second plate structure 30 ; and/or at least one protrusion 32 is welded to the first plate structure 20 .

Specifically, the effective fixing of the first plate-like structure 20 and the second plate-like structure 30 can be achieved by vacuum brazing, the welding position includes the edges of the two plate-like structures and at least one raised portion 32, and the raised portion 32 increases The connection reliability between the first plate structure 20 and the second plate structure 30 is improved, and the mechanical strength, pressure resistance and deformation resistance of the second plate structure 30 are increased.

Further, in order to ensure the connection reliability between the first plate structure 20 and the second plate structure 30 , the plurality of protrusions 32 are welded to the first plate structure 20 .

Optionally, the first plate structure 20 is a flat plate, and the edge of the plate is connected to the edge of the second plate structure 30; or, the first plate structure 20 includes the first main body plate segment 21 and the first main body plate segment 21 The connected first flange 22, the first flange 22 is arranged around the first main body panel section 21; the second plate structure 30 includes a second main body panel section 33 and a second flange 34 connected to the second main body panel section 33 , the second flange 34 is arranged around the second body plate segment 33; wherein, the second body plate segment 33 includes a plurality of recesses 31 and a plurality of protrusions 32, and the first fluid channel 40 is located between the first body plate segment 21 and Between the second body panel sections 33 , the first flange 22 and the second flange 34 are connected. Such a setting makes the first flange 22 increase the mechanical strength, pressure resistance and deformation resistance of the first plate structure 20, making the first plate structure 20 easy to assemble and position; the second flange 34 increases the strength of the second plate structure. The mechanical strength, pressure resistance and anti-deformation effect of the shape structure 30 make the second plate structure 30 easy to assemble and locate, and the first flange 22 and the second flange 34 increase the first plate structure 20 and the second plate structure. Connection reliability of structure 30.

During specific implementation, the edge of the first plate-shaped structure 20 is welded to the edge of the second plate-shaped structure 30 and/or the first flange 22 and the second flange 34 are welded, and the raised portion 32 and the first plate-shaped structure The contact points of 20 are connected by welding, so as to realize the connection between the first plate structure 20 and the second plate structure 30 . For occasions that do not require high mechanical strength, it is not necessary to set the first flange 22 and the second flange 34, and instead the edge of the first plate structure 20 is connected to the second plate structure 30 to reduce processing difficulty and production. cost.

In other embodiments, as shown in FIG. 7 , the heat exchange assembly 10 further includes: a third plate structure 11 , the third plate structure 11 and the first plate structure 20 are arranged on opposite sides of the second plate structure 30 side, the third plate structure 11 is connected to the second plate structure 30 with a second fluid channel 50 between them, and the second fluid channel 50 connects with the first fluid channel 40 through the through hole on the second plate structure 30 connected.

Specifically, such an arrangement makes it possible for the heat exchanger to be arranged in the case of double-sided heat source heat dissipation, the first plate structure 20 and the third plate structure 11 serve as two heat dissipation contact planes respectively, and the second plate structure 30 acts as a disturbing surface. Due to the effect of flow, the fluid exchanges and flows in the first fluid channel 40 and the second fluid channel 50, which further ensures that the fluids of different temperatures are mixed evenly and the temperature distribution of the heat exchanger is even.

Specifically, the maximum thickness of the second plate structure 30 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Such an arrangement can prevent the second plate-like structure 30 from being too thick to affect the heat exchange efficiency and increase the difficulty of punching, and prevent the second plate-like structure 30 from being too small to be convenient for arranging the raised portion 32 and the depressed portion 31 . Such an arrangement is especially suitable for when the heat exchange assembly 10 includes the third plate-like structure 11, the second plate-like structure 30 can be jointly supported by the third plate-like structure 11 and the first plate-like structure 20, avoiding the second plate-like structure 30 out of shape.

In this embodiment, as shown in FIG. 9 and FIG. 10 , the heat exchanger includes a plurality of heat exchange components 10, wherein: the plurality of heat exchange components 10 are connected in sequence, so that the fluid passes through the plurality of heat exchange components 10 in sequence; Alternatively, multiple heat exchange assemblies 10 are arranged in parallel, so that the fluid flows through the multiple heat exchange assemblies 10 respectively.

In practice, multiple small heat exchange components 10 can be connected in series or in parallel to replace a single large heat exchange component 10, reducing the die cost of the heat exchange component 10, meeting the generalization requirements of the heat exchange component 10, and strengthening the heat exchange component. 10 versatility, flexibility and processing convenience.

Optionally, on the premise that the pressure drop of the heat exchanger meets the requirements of use, the second plate structure 30 can also only be provided with the raised portion 32 to enhance the welding area to increase the compressive strength of the first fluid passage 40, or partially The poor strength area is designed as a fully convex structure, and the other areas are concave-convex structures, which can be designed according to the strength simulation or test results.

The present invention also provides an electrical appliance, which includes a heat-exchanging element, and the electrical appliance further includes the heat exchanger in the above embodiment, so that the heat exchanger exchanges heat with the heat-exchanging element.

The electrical appliance of the present invention includes a heat-exchanging element and the heat exchanger in the above embodiment, and the heat exchanger is used for exchanging heat with the heat-exchanging element. The heat exchanger includes a heat exchange assembly 10, the heat exchange assembly 10 has an inlet and an outlet, the heat exchange assembly 10 includes a first plate structure 20 and a second plate structure 30, the second plate structure 30 forms the first fluid channel 40 The first side has a plurality of depressions 31 and a plurality of protrusions 32 . The fluid flows into the first fluid channel 40 from the inlet, and when it flows through the protrusion 32, the flow direction of the fluid changes, so that the fluid forms a periodic and regular flow pattern of sudden expansion and contraction, so that fluids of different temperatures collide and collide with each other. Mixing ensures the mixing uniformity of each part of the fluid; when flowing through the concave part, the flow direction of the fluid changes, so that the fluid forms a return-shaped streamline and a local vortex in the normal direction, causing collisions and collisions between fluids of different temperatures. Mixing ensures the mixing uniformity of each part of the fluid; the alternately arranged recessed parts 31 and raised parts 32 work together to disrupt the flow of the fluid and change the flow direction of the fluid, so that the various parts of the fluid at different temperatures are continuously mixed, thereby strengthening the fluid inside. Mixing improves temperature distribution uniformity and heat transfer efficiency, thereby solving the problem of uneven temperature distribution of the plate heat exchanger in the prior art.

During specific implementation, when the fluid flows through the raised portion 32, the flow direction changes, forming a periodic and regular flow pattern of sudden expansion and sudden contraction. The disturbance caused by the raised portion 32 to the fluid causes fluids of different temperatures to mix and accelerate fluids of different temperatures. The uniformity of mixing, while thinning the boundary layer of the fluid, strengthens the heat transfer of the wall; when the fluid flows through the recessed part 31, it forms a return-shaped streamline and a local vortex in the normal direction, which enhances the mixing of fluids at different temperatures inside the fluid, Improve the temperature distribution uniformity of the heat exchanger, and at the same time, the disturbed fluid is periodically separated and merged into the mainstream, which can destroy the stability of the mainstream fluid and improve the heat transfer efficiency.

Specifically, the heat exchanger can heat the heat exchanging element, and can also dissipate heat from the heat exchanging element.

Specifically, electrical appliances refer to all appliances that use electricity, and electrical appliances can be commercial air-conditioning units, electric vehicles, and electric arc furnaces, so that heat exchangers can dissipate heat; electrical appliances can also be household appliances, such as granular ice machine systems, air-conditioning systems, and electric arc furnaces. One of a kind in the refrigerator/warmer. It should be noted that the electrical appliances are suitable for various heat dissipation and heating occasions, including but not limited to the heat dissipation of frequency converters of commercial air-conditioning units, the heat dissipation of electric vehicle batteries, the heat dissipation of electric arc furnaces, the refrigeration of granular ice machine systems, the heat dissipation and refrigeration of air-conditioning systems / Refrigeration and insulation of incubators.

During specific implementation, the heat exchanger 1 of the present invention can be used as an independent evaporator in the granular ice machine system, as shown in Figure 11, in order to meet the needs of ice production, the shape of the heat exchanger is designed as a groove, the first plate-shaped structure 20 is on the inner side and the second plate structure 30 is on the outside. A certain number of ice trays 3 are installed on the first plate structure 20 to control the size of the ice particles. As shown in Figure 12, during the ice making process, the pump 2 sprays water into the ice tray, the heat exchanger evaporates and cools at a low temperature, and the cold surface makes the water gradually freeze and grow; when the ice making is completed, the heat exchanger switches to Condenser mode heating, the hot surface melts the thin ice layer close to the first plate-like structure 20, and the ice cubes fall off from the surface of the cover plate under the action of gravity to achieve ice harvesting; the conventional granular ice machine adopts a coil heat exchanger scheme , although the structure is simple, the temperature distribution of the ice-making surface is uneven, the ice-making effect is poor, and the ice-melting process also has the problem of different ice-melting efficiency.

As shown in Fig. 13, the heat exchanger 1 of the present invention can be used as an auxiliary evaporator in an air-conditioning system (may be a large-scale central air-conditioning system) to meet the cooling requirements of frequency converters. The frequency converter of the central air-conditioning system generates a large amount of heat and has a high unit heat flux density, which is difficult to satisfy with conventional air-cooling and water-cooling. Refrigerant has large phase change heat, small temperature change in the evaporation process, and is easy to obtain in the refrigeration system. By applying the heat exchanger 1 of the present invention to set the auxiliary evaporator, the bypass pipeline is connected to the heat exchanger 1 after the refrigeration system is throttling, so as to realize the temperature control and heat dissipation of the frequency converter. At this time, the shape design of the heat exchanger 1 It is groove-shaped, with the second plate-like structure 30 on the inside and the first plate-like structure 20 on the outside, so as to achieve close fit with the heat-generating components of the frequency converter, reduce air thermal resistance, and improve heat dissipation performance.

As shown in Fig. 14, the heat exchanger 1 of the present invention can also be used as an independent evaporator in a refrigerator/insulation box, such as a small portable type. The overall design of the refrigeration system is box-shaped, the refrigeration/insulation space is surrounded by insulation materials, and the heat exchanger 1 is designed as a tray and placed at the bottom of the refrigeration/insulation space. The user sets the temperature requirements through the operation panel, and the refrigeration system is adjusted to meet the requirements through the system control. More preferably, a fan system is installed in the refrigerated/insulated space to realize forced convection, so that the uniformity of temperature distribution in the space is improved, and the function of refrigerated/insulated is better.

In short, the heat exchanger of the present invention is applicable to the scene where the outside of the cavity is heat conduction and heat exchange, and the fluid inside is not limited to refrigerant. When there is a cold/heat source that meets the needs of use, such as chilled water, hot water, etc., this type of fluid can also be used to obtain cold/heat.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

The heat exchanger of the present invention is simple in structure, strong in realizability, low in cost, and has great application advantages; it can be applied to refrigeration systems, and can realize heating and cooling functions by cooperating with corresponding system controls; according to application requirements, the heat exchanger It can be used as an independent heat exchanger in a refrigeration system, or as an auxiliary heat exchanger; since the first fluid channel 40 is a three-dimensional flow channel structure, the heat exchange performance of the heat exchanger of the present invention is improved by 5% compared with the traditional flat heat exchanger ~ 10%; since the second plate structure 30 and the first plate structure 20 are both stamped and formed, the processing cost of the heat exchanger of the present invention is reduced by about 50% to 70% compared with the traditional plate heat exchanger, thereby solving the problem of The problem of uneven temperature distribution of the heater and high processing cost.

The heat exchanger of the present invention includes a heat exchange assembly 10, the heat exchange assembly 10 has an inlet and an outlet, the heat exchange assembly 10 includes a first plate structure 20 and a second plate structure 30, and the second plate structure 30 forms the first fluid The first side of the channel 40 has a plurality of depressions 31 and a plurality of protrusions 32 . The fluid flows into the first fluid channel 40 from the inlet, and when it flows through the protrusion 32, the flow direction of the fluid changes, so that the fluid forms a periodic and regular flow pattern of sudden expansion and contraction, so that fluids of different temperatures collide and collide with each other. Mixing ensures the mixing uniformity of each part of the fluid; when flowing through the concave part, the flow direction of the fluid changes, so that the fluid forms a return-shaped streamline and a local vortex in the normal direction, causing collisions and collisions between fluids of different temperatures. Mixing ensures the mixing uniformity of each part of the fluid; the alternately arranged recessed parts 31 and raised parts 32 work together to disrupt the flow of the fluid and change the flow direction of the fluid, so that the various parts of the fluid at different temperatures are continuously mixed, thereby strengthening the fluid inside. Mixing improves temperature distribution uniformity and heat transfer efficiency, thereby solving the problem of uneven temperature distribution of the plate heat exchanger in the prior art.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (14)

1. A heat exchanger comprising a heat exchange assembly (10), the heat exchange assembly (10) having an inlet and an outlet, the heat exchange assembly (10) comprising:

a first plate-like structure (20);

-a second plate-like structure (30) connected to said first plate-like structure (20) with a first fluid channel (40) therebetween, said inlet and said outlet being in communication with said first fluid channel (40), respectively;

the second plate-like structure (30) forming a first side of the first fluid channel (40) having a plurality of recesses (31) and a plurality of protrusions (32), wherein the recesses (31) and the protrusions (32) are alternately arranged in a direction from the inlet to the outlet;

the first fluid channel (40) has oppositely disposed first and second side walls along a direction perpendicular to its extension; at least one deflection part (41) is arranged in the first fluid channel (40), the at least one deflection part (41) divides the first fluid channel (40) into at least two channel sections (42), and the at least two channel sections (42) are sequentially arranged along the extending direction of the first fluid channel (40); and a communication port is formed between each baffling part (41) and the first side wall or the second side wall.

2. The heat exchanger according to claim 1, wherein the concave portions (31) and the convex portions (32) are alternately arranged along a first preset direction, wherein the inlet and the outlet are sequentially arranged along a second preset direction, and the first preset direction is perpendicular to the second preset direction.

3. A heat exchanger according to claim 1 wherein,

part of the plate sections of the second plate-shaped structure (30) are arranged in a protruding way towards the direction of the first plate-shaped structure (20) to form the protruding part (32); and/or the number of the groups of groups,

a part of the plate sections of the second plate-shaped structure (30) are concavely arranged towards a direction away from the first plate-shaped structure (20) to form the concave part (31).

4. A heat exchanger according to claim 1 wherein,

the cross section of the convex part (32) perpendicular to the convex direction is gradually reduced along the convex direction; and/or the number of the groups of groups,

the cross section of the groove formed by the concave part (31) perpendicular to the concave direction is gradually reduced along the concave direction.

5. A heat exchanger according to claim 1 wherein,

the projection of the bulge (32) on the first reference surface is at least one of semicircle, triangle, trapezoid and diamond; wherein the first reference surface is parallel to the protruding direction of the protruding portion (32); and/or the number of the groups of groups,

the projection of the groove formed by the concave part (31) on the second reference plane is at least one of semicircle, triangle, trapezoid and diamond; wherein the second reference surface is parallel to the recess direction of the recess portion (31).

6. A heat exchanger according to any one of claims 1 to 5 wherein,

when at least two baffling parts (41) are arranged in the first fluid channel (40), the communication port is arranged between one (41) of the two adjacent baffling parts (41) and the first side wall, and the communication port is arranged between the other (41) of the two adjacent baffling parts (41) and the second side wall.

7. The heat exchanger according to claim 6, wherein when there are at least two of said baffles (41) in said first fluid passage (40); wherein:

-at least two of said channel segments (42) have equal widths along the extension of said first fluid channel (40) in the direction from said inlet to said outlet; or alternatively

-at least two of said channel segments (42) taper in width in the direction of extension of said first fluid channel (40) in the direction from said inlet to said outlet; or alternatively

At least two of the channel segments (42) have progressively increasing widths in the direction of extension of the first fluid channel (40) in the direction from the inlet to the outlet.

8. The heat exchanger according to claim 6, wherein a portion of the plate sections of the second plate-like structure (30) are arranged protruding in the direction of the first plate-like structure (20) forming the baffle (41).

9. A heat exchanger according to any one of claims 1 to 5 wherein,

the edge of the first plate-like structure (20) is welded with the edge of the second plate-like structure (30); and/or at least one of said bosses (32) is welded to said first plate-like structure (20).

10. A heat exchanger according to any one of claims 1 to 5 wherein,

the first plate-like structure (20) is a flat plate, the edges of which are connected with the edges of the second plate-like structure (30); or alternatively

The first plate-shaped structure (20) comprises a first main body plate section (21) and a first flanging (22) connected with the first main body plate section (21), and the first flanging (22) is arranged around the first main body plate section (21); the second plate-shaped structure (30) comprises a second main body plate section (33) and a second flanging (34) connected with the second main body plate section (33), and the second flanging (34) is arranged around the second main body plate section (33); the second main body plate section (33) comprises a plurality of concave parts (31) and a plurality of convex parts (32), the first fluid channel (40) is located between the first main body plate section (21) and the second main body plate section (33), and the first flanging (22) and the second flanging (34) are connected.

11. The heat exchanger according to any one of claims 1 to 5, wherein the heat exchange assembly (10) further comprises:

the third plate-shaped structure (11), the third plate-shaped structure (11) and the first plate-shaped structure (20) are arranged on two opposite sides of the second plate-shaped structure (30), the third plate-shaped structure (11) and the second plate-shaped structure (30) are connected, a second fluid channel (50) is arranged between the third plate-shaped structure and the second plate-shaped structure, and the second fluid channel (50) is communicated with the first fluid channel (40) through a through hole on the second plate-shaped structure (30).

12. Heat exchanger according to claim 11, wherein the maximum thickness of the second plate-like structure (30) is greater than or equal to 0.1mm and less than or equal to 0.3mm.

13. The heat exchanger according to any one of claims 1 to 5, wherein the heat exchanger comprises a plurality of the heat exchange assemblies (10), wherein:

the heat exchange assemblies (10) are sequentially communicated, so that fluid sequentially passes through the heat exchange assemblies (10); or alternatively

A plurality of heat exchange assemblies (10) are arranged in parallel so that fluid flows through the plurality of heat exchange assemblies (10) respectively.

14. An electrical appliance comprising a piece to be heat exchanged, characterized in that the electrical appliance further comprises a heat exchanger according to any one of claims 1 to 13, such that the heat exchanger exchanges heat with the piece to be heat exchanged.

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