Radiating device and equipment with same

Abstract

The utility model relates to the technical field of heat dissipation, and discloses a heat dissipation device and equipment with the heat dissipation device, and the heat dissipation device comprises a housing which is provided with an accommodation cavity and an air outlet, the accommodation cavity is suitable for placing a circuit structure, one side of the housing close to heat dissipation fins is provided with a first heat dissipation channel, and one side of the housing close to a heating element is provided with a second heat dissipation channel. The first heat dissipation channel and the second heat dissipation channel are respectively communicated with the air outlet; the first fan is arranged on the other side of the shell, the first fan comprises a first air outlet, and the first air outlet communicates with the first heat dissipation channel; and the flow guide structure is arranged between the first heat dissipation channel and the second heat dissipation channel and is suitable for guiding air in the first heat dissipation channel to the second heat dissipation channel, so that outlet air of the first fan can flow to the first heat dissipation channel to dissipate heat of the heat dissipation fins. And meanwhile, the air after heat exchange of the heat dissipation fins can flow to the second heat dissipation channel through the flow guide structure so as to dissipate heat of the heating element and prevent the temperature of the heating element from exceeding the standard.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation, and particularly relates to a heat dissipation device and a device with the heat dissipation device. Background Art

[0002] With the development of chip technology, more and more functional modules are integrated on a circuit board, and the power consumption of the modules is continuously increasing. As a result, a large amount of heat is generated during the operation of the overall circuit structure. To protect the circuit structure and maintain performance requirements, necessary measures need to be taken to dissipate heat from the circuit structure.

[0003] In the prior art, considering space limitations and heat dissipation requirements, the circuit structure is generally divided into upper and lower layers. The upper layer is the heating element, and the lower layer is provided with heat dissipation fins. The heat of the heating element is transferred to the heat dissipation fins by heat conduction, and then the heat is carried out through forced convection between the heat dissipation fan and the heat dissipation fins. However, this method only relies on the heat conduction of the heat dissipation fins for heat dissipation, and it is still easy to have the problem that the temperature of the heating element exceeds the standard. Summary of the Utility Model

[0004] In view of this, the utility model provides a heat dissipation device and a device with the heat dissipation device to solve the problem that the temperature of the heating element in the existing circuit structure is easy to exceed the standard.

[0005] In the first aspect, the utility model provides a heat dissipation device, including:

[0006] A housing, which has a receiving cavity and an air outlet. The air outlet is arranged on one side of the housing and is communicated with the receiving cavity. The receiving cavity is suitable for placing a circuit structure. The circuit structure includes a heating element and heat dissipation fins. A first heat dissipation channel is arranged on the side of the housing close to the heat dissipation fins, and a second heat dissipation channel is arranged on the side of the housing close to the heating element. The first heat dissipation channel and the second heat dissipation channel are respectively communicated with the air outlet;

[0007] A first fan, which is arranged outside the housing. The first fan includes a first air outlet, and the first air outlet is communicated with the first heat dissipation channel;

[0008] A flow guiding structure, which is arranged between the first heat dissipation channel and the second heat dissipation channel and is suitable for guiding the air in the first heat dissipation channel to the second heat dissipation channel.

[0009] Beneficial effects: By providing a first heat dissipation channel on one side of the housing close to the heat dissipation fins, a second heat dissipation channel on one side of the housing close to the heating element, and a flow guiding structure between the first heat dissipation channel and the second heat dissipation channel, the air discharged by the first fan can flow into the first heat dissipation channel to dissipate heat from the heat dissipation fins. At the same time, the air after heat exchange with the heat dissipation fins can also flow through the flow guiding structure into the second heat dissipation channel to further dissipate heat from the heating element, so as to further reduce the surface temperature of the heating element, prevent the temperature of the heating element from exceeding the standard, and extend the service life of the heating element.

[0010] In an optional implementation manner, the second heat dissipation channel is provided in the accommodation cavity.

[0011] In an optional implementation manner, the second heat dissipation channel is the cavity of the accommodation cavity close to the heating element.

[0012] Beneficial effects: By setting the second heat dissipation channel as the cavity of the accommodation cavity close to the heating element, that is, the second heat dissipation channel is directly a part of the accommodation cavity, and there is no need to set an additional heat dissipation channel, the structure is simpler and more compact.

[0013] In an optional implementation manner, the flow guiding structure includes:

[0014] A flow guiding port communicated with the first heat dissipation channel;

[0015] A flow guiding member connected to the side wall of the housing, the flow guiding member is provided on the side of the flow guiding port close to the heating element and is adapted to guide air towards the heating element.

[0016] Beneficial effects: By setting the flow guiding structure in the form of including a flow guiding port and a flow guiding member, the air in the first heat dissipation channel can enter the second heat dissipation channel through the flow guiding port and be guided towards the heating element under the guidance of the flow guiding member, so that the air with a lower temperature can be directly guided to the heating element, improving the air flow guiding effect and the heat dissipation effect on the heating element.

[0017] In an optional implementation manner, the flow guiding structure includes:

[0018] A spacer, one end of which is connected to the flow guiding port and the other end is provided in the second heat dissipation channel, and the other end of the spacer is arranged close to the flow guiding member.

[0019] Beneficial effects: By providing a spacer, it is convenient to drain air from the flow guiding port to the flow guiding member, preventing air from flowing directly from the flow guiding port to the exhaust port and ensuring the air guiding effect towards the heating element.

[0020] In an optional implementation manner, the flow guiding member includes:

[0021] The first air guiding part, and the first air guiding part is connected to the other end of the spacer;

[0022] At least one second air guiding part, one end of which is connected to the first air guiding part, and the other end extends towards the direction close to the heating element, and the second air guiding part and the first air guiding part are arranged at an angle to each other.

[0023] Beneficial effects: By arranging the air guiding member in the form of including the first air guiding part and the second air guiding part, the air diverted from the air guiding port can be directly guided towards the heating element through the spacer, the first air guiding part and the second air guiding part, ensuring the heat dissipation effect on the heating element.

[0024] In an optional embodiment, the surface of the first air guiding part facing the spacer is a guiding surface, and the guiding surface is inclined.

[0025] Beneficial effects: By setting the surface of the first air guiding part facing the spacer as an inclined guiding surface, it is convenient to guide the flow of air.

[0026] In an optional embodiment, the spacer is located between the air guiding port and the air exhaust port.

[0027] Beneficial effects: By arranging the spacer between the air guiding port and the air exhaust port, it can prevent air from flowing directly towards the air exhaust port, ensuring that air can be diverted towards the second heat dissipation channel.

[0028] In an optional embodiment, the air guiding port and the air exhaust port are arranged in a staggered manner;

[0029] And / or, the circuit structure includes a circuit board, and the air guiding port is arranged close to the circuit board;

[0030] And / or, the cross-section of the air guiding port is rectangular.

[0031] Beneficial effects: By arranging the air guiding port and the air exhaust port in a staggered manner, it can further prevent air from flowing directly towards the air exhaust port; by arranging the air guiding port close to the circuit board, it can play a certain heat dissipation effect on the circuit board.

[0032] In an optional embodiment, the first fan includes a second air outlet, and the second air outlet is communicated with the second heat dissipation channel.

[0033] Beneficial effects: By arranging the first fan to include a second air outlet communicated with the second heat dissipation channel, the air discharged from the second air outlet can directly exchange heat with the heating element, enhancing the heat exchange between the cold air and the heating element.

[0034] In an optional embodiment, the first fan is a centrifugal fan.

[0035] Beneficial effects: By setting the first fan as a centrifugal fan, it is convenient to set two air outlets and the volume is relatively small.

[0036] In an alternative embodiment, the distance between the center line of the second air outlet and the top of the housing is between 10 mm and 20 mm.

[0037] Beneficial effects: By setting the distance between the center line of the second air outlet and the top of the housing to be between 10 mm and 20 mm, the air outlet of the second air outlet is closer to the heating element in the housing, enhancing the heat exchange effect.

[0038] In an alternative embodiment, the heat dissipation device includes:

[0039] A second fan, arranged close to the air outlet, and the second fan is adapted to discharge the air in the accommodation cavity outwards through the air outlet.

[0040] Beneficial effects: By arranging a second fan at the air outlet, it is convenient to discharge the high-temperature air in the accommodation cavity outwards, improving the heat exchange effect.

[0041] In an alternative embodiment, the second fan is an axial flow fan.

[0042] In a second aspect, the present invention further provides a device with a heat dissipation device, including:

[0043] The above-mentioned heat dissipation device;

[0044] A circuit structure, arranged in the heat dissipation device.

[0045] Beneficial effects: Since the device with a heat dissipation device includes the above-mentioned heat dissipation device, it has the same effects as the above-mentioned heat dissipation device, which will not be elaborated here.

[0046] In an alternative embodiment, the device with a heat dissipation device is a dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0048] Figure 1 It is a schematic structural diagram of a heat dissipation device according to an embodiment of the present invention;

[0049] Figure 2 It is a partial structural diagram of the heat dissipation device;

[0050] Figure 3 Partial structural schematic diagram of a heat dissipation device for placing a circuit structure from one perspective;

[0051] Figure 4 Partial structural schematic diagram of a heat dissipation device for placing a circuit structure from another perspective;

[0052] Figure 5 Cross-sectional view of a heat dissipation device for placing a circuit structure;

[0053] Figure 6 For Figure 5 Cross-sectional view in the opposite direction;

[0054] Figure 7 Cross-sectional view of the heat dissipation device in the top view direction;

[0055] Figure 8 Perpendicular to Figure 6 Direction, cross-sectional view at the flow guiding structure;

[0056] Figure 9 Schematic diagram of the simulated temperature distribution of heat dissipation devices with different solutions.

[0057] Explanation of reference numerals:

[0058] 1. Housing; 2. Air outlet; 3. Heating element; 4. Heat dissipation fins; 5. First heat dissipation channel; 6. Second heat dissipation channel; 7. First fan; 701. First air outlet; 702. Second air outlet; 8. Flow guiding port; 9. Spacer; 10. Flow guiding member; 101. First flow guiding portion; 102. Second flow guiding portion; 11. Circuit board; 12. Second fan. Detailed implementation manners

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0060] Next, in conjunction with Figures 1 to 9 , the embodiments of the present utility model will be described.

[0061] According to an embodiment of the present utility model, on the one hand, a heat dissipation device is provided, including:

[0062] The housing 1 has a receiving cavity and an air outlet 2. The air outlet 2 is provided on one side of the housing 1 and is in communication with the receiving cavity. A circuit structure is adapted to be placed in the receiving cavity. The circuit structure includes a heating element 3 and heat dissipation fins 4. A first heat dissipation channel 5 is provided on the side of the housing 1 close to the heat dissipation fins 4, and a second heat dissipation channel 6 is provided on the side of the housing 1 close to the heating element 3. The first heat dissipation channel 5 and the second heat dissipation channel 6 are respectively in communication with the air outlet 2;

[0063] The first fan 7 is provided outside the housing 1. The first fan 7 includes a first air outlet 701, and the first air outlet 701 is in communication with the first heat dissipation channel 5;

[0064] A flow guiding structure is provided between the first heat dissipation channel 5 and the second heat dissipation channel 6 and is adapted to guide the air in the first heat dissipation channel 5 towards the second heat dissipation channel 6.

[0065] By providing the first heat dissipation channel 5 on the side of the housing 1 close to the heat dissipation fins 4, the second heat dissipation channel 6 on the side of the housing 1 close to the heating element 3, and a flow guiding structure between the first heat dissipation channel 5 and the second heat dissipation channel 6, the air discharged from the first fan 7 can flow into the first heat dissipation channel 5 to dissipate heat from the heat dissipation fins 4. At the same time, the air after heat exchange with the heat dissipation fins 4 can also flow through the flow guiding structure into the second heat dissipation channel 6 to further dissipate heat from the heating element 3, so as to further reduce the surface temperature of the heating element 3, prevent the temperature of the heating element 3 from exceeding the standard, and extend the service life of the heating element 3.

[0066] As Figure 3 shown, in this embodiment, there are multiple heating elements 3, which are mainly arranged on the side of the flow guiding structure close to the first fan 7. Of course, in other embodiments, there may be one heating element 3, or the specific number of multiple heating elements 3 can be set according to actual needs, and no further limitation is made here.

[0067] In this embodiment, the second heat dissipation channel 6 is provided in the receiving cavity. Specifically, as Figure 5 shown, the second heat dissipation channel 6 in this embodiment is a part of the receiving cavity, which is the upper cavity of the receiving cavity close to the heating element 3. By setting the second heat dissipation channel 6 as the cavity of the receiving cavity close to the heating element 3, that is, the second heat dissipation channel 6 is directly a part of the receiving cavity, and there is no need to set an additional heat dissipation channel, so the structure is simpler and more compact. As an alternative embodiment, it can also be that the second heat dissipation channel 6 is a channel separately provided in the receiving cavity close to the heating element 3, or the second heat dissipation channel 6 is provided outside the housing 1 on the side close to the heating element 3 to further dissipate heat from the heating element 3 through heat conduction, or most of the second heat dissipation channel 6 is provided outside the housing 1 and a small part leads to the place close to the heating element 3 in the receiving cavity.

[0068] As Figure 3 andFigure 4 As shown, the first heat dissipation channel 5 in this embodiment includes two parts. One part is disposed inside the housing 1, on the side of the housing 1 close to the heat dissipation fins 4, and the other part is disposed outside the housing 1 and is docked with the first air outlet 701. As an alternative embodiment, it is also possible that the first heat dissipation channel 5 is all disposed outside the housing 1, on the side close to the heat dissipation fins 4, and further dissipates heat from the heat dissipation fins 4 through heat conduction. Or, the first heat dissipation channel 5 is all disposed inside the housing 1, and the first air outlet 701 directly extends into the first heat dissipation channel 5.

[0069] As Figure 3 As shown, the diversion structure in this embodiment includes: a diversion port 8, which is communicated with the first heat dissipation channel 5; a spacer 9, one end of which is connected to the diversion port 8, and the other end is disposed in the second heat dissipation channel 6, and the other end of the spacer 9 is disposed close to the deflector 10; a deflector 10, which is connected to the side wall of the housing 1, the deflector 10 is disposed at the other end of the spacer 9, and is adapted to divert air to the heating element 3. By setting the diversion structure to include the diversion port 8, the spacer 9 and the deflector 10, the air in the first heat dissipation channel 5 can enter the second heat dissipation channel 6 through the diversion port 8 and the spacer 9, and is diverted to the heating element 3 under the guidance of the deflector 10, so that the air with a lower temperature can be directly diverted to the heating element 3, improving the air diversion effect and the heat dissipation effect on the heating element 3. As an alternative embodiment, it is also possible that the diversion structure includes the diversion port 8 and the deflector 10, without setting the spacer 9, and the air diffuses from the diversion port 8 to the deflector 10 by natural air flow and is diverted to the heating element 3 by the deflector 10.

[0070] There are many specific forms of setting the deflector 10. The deflector 10 in this embodiment includes: a first deflector part 101, which is disposed at the other end of the spacer 9; at least one second deflector part 102, one end of which is connected to the first deflector part 101, and the other end extends in the direction close to the heating element 3, and the second deflector part 102 is disposed at an angle with the first deflector part 101. Specifically, the second deflector part 102 is disposed perpendicular to the first deflector part 101. By setting the deflector 10 to include the first deflector part 101 and the second deflector part 102, the air diverted from the diversion port 8 can be directly guided to the heating element 3 through the spacer 9, the first deflector part 101 and the second deflector part 102, ensuring the heat dissipation effect on the heating element 3. As an alternative embodiment, it is also possible that the specific setting angle between the second deflector part 102 and the first deflector part 101 is set according to actual needs, and no more restrictions are made here.

[0071] Since the heating element 3 in this embodiment is disposed between the first fan 7 and the first deflector part 101, specifically as Figure 5 and Figure 6As shown in the figure, there is one second air guiding part 102 in this embodiment, which is connected to one side of the first air guiding part 101 close to the first fan 7.

[0072] It should be noted that in other embodiments, if the heating element 3 is also provided on the other side of the first air guiding part 101, two second air guiding parts 102 can be provided, which are respectively connected to both sides of the first air guiding part 101; or, if the heating element 3 is also provided in other directions, more second air guiding parts 102 can be correspondingly provided, as long as the second air guiding part 102 can guide the air with lower temperature towards the heating element 3.

[0073] As Figure 8 shown in the figure, the first air guiding part 101 is in the shape of a triangular prism, and the surface facing the other end of the spacer 9 is an inclined guiding surface, and the angle Φ1 between the guiding surface and the vertical direction is 30° - 60°; as Figure 6 shown in the figure, the second air guiding part 102 is in the shape of a triangular pyramid, and the angle Φ2 between the hypotenuse of the horizontal side of the second air guiding part 102 close to the guiding surface and the horizontal side of the guiding surface is 110° - 140°; the extension height h2 of the first air guiding part 101 and the second air guiding part 102 is 10 mm - 20 mm, and the extension lengths d3 and d4 are 10 mm - 40 mm. As a changeable implementation manner, it can also be that the specific dimensions of the air guiding structure are set according to actual needs, and no excessive restrictions are made here.

[0074] According to simulation calculations, compared with the original scheme (a heat dissipation device with only the first air outlet 701 and no air guiding structure), after adding the air guiding structure, the average surface temperature of each heating element 3 has decreased by about 22%. However, since the air volume flowing through the surface of the heat dissipation fins 4 has decreased, the surface temperature of the heat dissipation fins 4 has increased by 14.3%, but the surface temperature of the heat dissipation fins 4 is still much lower than the surface temperature of the heating element 3.

[0075] In order to prevent air from directly flowing towards the air outlet 2, the spacer 9 in this embodiment is located between the air guiding port 8 and the air outlet 2, and can ensure that the air is guided towards the second heat dissipation channel 6. Specifically, the spacer 9 is a spacer plate.

[0076] As Figure 4 shown in the figure, the heat dissipation fins 4 in this embodiment are arranged in the lower layer of the accommodation cavity, the heating element 3 is arranged above the heat dissipation fins 4, the first heat dissipation channel 5 is arranged below the heat dissipation fins 4, the heat dissipation fins 4 transfer the heat of the heating element 3 to itself through heat conduction, and the airflow in the lower first heat dissipation channel 5 takes away the heat. The second heat dissipation channel 6 is the space in the accommodation cavity close to the upper part at the position of the heating element 3, the air guiding port 8 is arranged close to the first heat dissipation channel 5, and the spacer 9 is arranged in the vertical direction and is connected between the first heat dissipation channel 5 and the second heat dissipation channel 6.

[0077] In this embodiment, the diversion port 8 and the exhaust port 2 are arranged offset from each other, which can further prevent air from flowing directly towards the exhaust port 2 and then flowing out directly. Specifically, as shown in Figure 4 , the diversion port 8 is arranged on the side close to the page, and the exhaust port 2 is arranged on the side far from the page. Correspondingly, the housing 1 is provided with a notch at the position corresponding to the diversion port 8 at the exhaust port 2. As an alternative embodiment, it is also possible that the diversion port 8 and the exhaust port 2 are on the same side, and the space is separated by a spacer 9 and guided towards the second heat dissipation channel 6.

[0078] The circuit structure in this embodiment includes a circuit board 11, and the diversion port 8 is arranged close to the circuit board 11. Since the circuit board 11 also belongs to a heat-generating component, arranging the diversion port 8 close to the circuit board 11 can also have a certain heat dissipation effect on the circuit board 11. As an alternative embodiment, it is also possible that the diversion port 8 is arranged at other positions and not close to the circuit board 11.

[0079] As shown in Figure 4 , Figure 5 and Figure 7 , the diversion port 8 in this embodiment is a long strip-shaped channel recessed into the housing 1, with a rectangular cross-section. The width d1 of the diversion port 8 is 5 mm - 15 mm, the length d2 is 40 mm - 80 mm, and the height h1 is 15 mm - 25 mm. As an alternative embodiment, it is also possible that the specific dimensions of the diversion port 8 are set according to actual needs, and no further limitations are made here.

[0080] The first fan 7 in this embodiment includes a second air outlet 702, and the second air outlet 702 is communicated with the second heat dissipation channel 6. By setting the first fan 7 to include the second air outlet 702 communicated with the second heat dissipation channel 6, the air discharged from the second air outlet 702 can directly exchange heat with the heat-generating component 3, enhancing the heat exchange between the cold air and the heat-generating component 3.

[0081] Specifically, the first fan 7 in this embodiment is a centrifugal fan, which is arranged at one end of the housing 1 to provide intake air flow for the overall structure. By setting the first fan 7 as a centrifugal fan, it is convenient to set two air outlets and the volume is relatively small. As an alternative embodiment, it is also possible that the first fan 7 is a fan of other forms, as long as two air outlets can be set.

[0082] Since the first heat dissipation channel 5 is located below the housing 1 and the second heat dissipation channel 6 is close to the upper part of the housing 1, the first air outlet 701 is arranged close to the lower side of the first fan 7, and the heat of the first heat dissipation channel 5 at the lower part is taken away through convective heat transfer to reduce the temperature of the overall structure. The second air outlet 702 is arranged close to the upper side of the first fan 7 to provide air flow for the upper second heat dissipation channel 6.

[0083] As shown in Figure 5As shown, the distance h3 between the center line of the second air outlet 702 and the top of the housing 1 is between 10 mm and 20 mm. By setting the distance between the center line of the second air outlet 702 and the top of the housing 1 to be between 10 mm and 20 mm, the air outlet of the second air outlet 702 is closer to the heating element 3 inside the housing 1, enhancing the heat exchange effect. As a variable implementation, it can also be that the specific setting position of the second air outlet 702 is adjusted according to the setting height of the heating element 3, and no more restrictions are made here.

[0084] As Figure 9 shown, from top to bottom, they are the schematic diagrams of the simulated temperature distribution of the original solution (only setting the first air outlet 701 without setting the diversion structure), the improved solution with the added diversion structure, and the improved solution with the added second outlet and diversion structure. Among them, the darker the color, the higher the temperature, and the lighter the color, the lower the temperature.

[0085] After simulation calculations, compared with the original solution, after adding the second air outlet 702 and the diversion structure, the surface temperature of each heating element 3 has decreased by an average of 57.2%. Similarly, since part of the air volume is distributed to the upper second heat dissipation channel 6, the average surface temperature of the lower heat dissipation fins 4 has increased by 4.2%, but its surface temperature is also much lower than the surface temperature of the heating element 3.

[0086] The heat dissipation device in this embodiment includes: a second fan 12, which is arranged close to the air outlet 2. The second fan 12 is adapted to discharge the air in the accommodation cavity through the air outlet 2. By arranging the second fan 12 at the air outlet 2, it is convenient to discharge the high-temperature air in the accommodation cavity outward, improving the heat exchange effect.

[0087] Specifically, the second fan 12 is an axial flow fan, and its function is to discharge the hot air flow in the overall structure. The second fan 12 is arranged inside the housing 1, connected to the air outlet 2, and is respectively arranged at both ends of the housing 1 opposite to the first fan 7.

[0088] The main function of the deflector 10 is to guide the upward air flow to blow towards the heating element 3. The deflector 10 is arranged directly above the deflector opening 8. The diversion structure is a key feature for solving the heat dissipation problem of the heating element 3. The reason for such a setting is that after the air flow passes through the deflector opening 8, it will directly flow towards the air outlet 2 due to the pumping action of the axial flow fan. Therefore, setting the diversion structure can guide part of the air flow to directly blow towards the heating element 3, thereby enhancing the heat exchange effect.

[0089] In the heat dissipation device of this embodiment, the overall air duct structure is divided into two upper and lower heat dissipation air ducts, namely the first heat dissipation channel 5 and the second heat dissipation channel 6. A large number of heating elements 3 are arranged in the upper part of the accommodation cavity in the housing 1, and heat dissipation fins 4 are arranged in the lower part. A first fan 7 is provided at one end outside the housing 1. The first fan 7 supplies a blowing air flow from the lower first heat dissipation channel 5. A diversion port 8 is provided on one side of the bottom of the circuit board 11, and a diversion member 10 is provided above the diversion port 8. The cold air flowing out from the first fan 7, part of it flows through the heat dissipation fins 4 and then flows out from the air outlet 2, and the other part flows through the upper second heat dissipation channel 6 through the diversion port 8 and is respectively guided by the upper diversion member 10 to flow to the heating elements 3 to strengthen the convective heat transfer of the heating elements 3; A second fan 12 and an air outlet 2 are provided at the other end outside the housing 1 to extract the internal hot air flow from the housing 1 and discharge it. At the same time, in order to further increase the local wind speed in the space and strengthen the convective heat transfer in the upper space, a second air outlet 702 is opened on the upper side of the first fan 7 to provide cooling air flow for the upper second heat dissipation channel 6 at the same time.

[0090] During actual use, the cold air is sucked into the volute by the first fan 7, and after acceleration, it is divided into two air flows and flows into the housing 1 from two air outlets. The lower air flow first flows through the heat dissipation fins 4, and part of the air flow is guided into the upper space through the diversion port 8 and the upper diversion member 10 and exchanges heat with the upper heating elements 3, and then leaves the housing 1 under the suction of the axial flow fan; The upper air flow directly exchanges heat with the heating elements 3 and then is taken away from the housing 1 by the second fan 12. The above means enhance the heat exchange between the cold air and the heating elements 3, so the beneficial effects of reducing the surface temperature of the heating elements 3 and prolonging the service life of the heating elements 3 can be achieved.

[0091] According to an embodiment of the present invention, on the other hand, an apparatus with a heat dissipation device is also provided, including:

[0092] The above heat dissipation device;

[0093] A circuit structure, which is arranged in the heat dissipation device.

[0094] Specifically, the apparatus with a heat dissipation device in this embodiment is a dishwasher, and the heat dissipation device is a heat dissipation device for the high-voltage power supply module of the dishwasher. Of course, in other embodiments, the heat dissipation device can also be used for other devices with a circuit structure that requires heat dissipation of the circuit structure.

[0095] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heat dissipation device, characterized in that: include: A shell (1), the shell (1) comprising a accommodating cavity and an exhaust port (2), the exhaust port (2) being arranged on one side of the shell (1), the exhaust port (2) being communicated with the accommodating cavity, the accommodating cavity being suitable for accommodating a circuit structure, the circuit structure comprising a heating element (3) and a heat dissipation fin (4), a first heat dissipation channel (5) being arranged on a side of the shell (1) close to the heat dissipation fin (4), a second heat dissipation channel (6) being arranged on a side of the shell (1) close to the heat dissipation element (3), the first heat dissipation channel (5) and the second heat dissipation channel (6) being communicated with the exhaust port (2) respectively; A first fan (7) is arranged on the outside of the housing (1), the first fan (7) comprising a first air outlet (701), the first air outlet (701) being in communication with the first heat dissipation channel (5); The air guide structure is arranged between the first heat dissipation channel (5) and the second heat dissipation channel (6), and is suitable for guiding the air in the first heat dissipation channel (5) to the second heat dissipation channel (6).

2. The heat dissipation device according to claim 1, characterized in that: The second heat dissipation channel (6) is arranged in the accommodating cavity.

3. The heat dissipation device according to claim 2, characterized in that: The second heat dissipation channel (6) is a cavity of the accommodating cavity close to the heating element (3).

4. The heat dissipation device according to claim 2, characterized in that: The flow guiding structure comprises: A guide port (8) connected to the first heat dissipation channel (5); A flow guide (10) is connected to the side wall of the housing (1); the flow guide (10) is arranged on a side of the flow guide port (8) close to the heating element (3) and is suitable for guiding air toward the heating element (3).

5. The heat dissipation device according to claim 4, characterized in that: The flow guiding structure comprises: A spacer (9) has one end connected to the air guide port (8) and the other end arranged in the second heat dissipation channel (6); the other end of the spacer (9) is arranged close to the air guide (10).

6. The heat dissipation device according to claim 5, characterized in that: The flow guide (10) comprises: A first flow guide portion (101), the first flow guide portion (101) being connected to the other end of the spacer (9); At least one second guide portion (102) has one end connected to the first guide portion (101) and the other end extending in a direction close to the heating element (3); the second guide portion (102) and the first guide portion (101) are arranged at an angle to each other.

7. The heat dissipation device according to claim 6, characterized in that: The surface of the first guide portion (101) facing the spacer (9) is a guide surface, and the guide surface is arranged inclined.

8. The heat dissipation device according to claim 5, characterized in that: The spacer (9) is located between the air guide port (8) and the air outlet (2).

9. The heat dissipation device according to claim 4, characterized in that: The air guide port (8) and the air exhaust port (2) are arranged in a staggered manner; And / or, the circuit structure comprises a circuit board (11), and the air guide port (8) is arranged close to the circuit board (11); And / or, the cross section of the guide port (8) is rectangular.

10. The heat dissipation device according to any one of claims 1 to 9, characterized in that: The first fan (7) comprises a second air outlet (702), and the second air outlet (702) is connected to the second heat dissipation channel (6).

11. The heat dissipation device according to claim 10, characterized in that: The first fan (7) is a centrifugal fan.

12. The heat dissipation device according to claim 10, characterized in that: The distance between the center line of the second air outlet (702) and the top of the shell (1) is 10 mm-20 mm.

13. The heat dissipation device according to any one of claims 1 to 9, characterized in that: The heat dissipation device comprises: The second fan (12) is arranged close to the exhaust port (2), and the second fan (12) is suitable for exhausting the air in the accommodating chamber to the outside through the exhaust port (2).

14. The heat dissipation device according to claim 13, characterized in that: The second fan (12) is an axial flow fan.

15. A device having a heat dissipation device, characterized in that: include: The heat dissipation device according to any one of claims 1 to 14; The circuit structure is arranged in the heat dissipation device.

16. The device with heat dissipation device according to claim 15, characterized in that: The device with the heat dissipation device is a dishwasher.

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