CN110754961A - Heat radiation structure for oven - Google Patents

Abstract

The invention relates to a heat dissipation structure for an oven, comprising an air guide cover arranged on the top of the box body of the oven, one end of the air guide cover is an air inlet and the other end is an air outlet, the air inlet and the air outlet A diversion channel is formed therebetween, a centrifugal fan assembly is arranged at the air inlet, and an air outlet port of the centrifugal fan assembly communicates with the air inlet. Compared with the prior art, the present invention adopts the centrifugal fan assembly to provide the air source for the diversion channel, and compared with the existing cross-flow fan, the noise is low, the failure is not easy to occur, the service life is long, and the user can obtain good use. In addition, the air volume is large, so that a better heat dissipation effect can be obtained.

Description

A heat dissipation structure for an oven

technical field

The invention relates to the field of ovens, in particular to a heat dissipation structure for ovens.

Background technique

The oven will generate a lot of heat during the working process, and in the kitchen decoration, the oven is generally embedded in the cabinet or other structure. When the oven is working, its surface temperature will exceed 150 ℃. If the heat accumulates inside the oven, it will not only speed up the oven circuit And the aging speed of electronic components, shorten the service life of the oven, and even cause the inner liner of the oven to rupture, causing danger.

In traditional ovens, a cross-flow fan is generally used to dissipate heat for components such as the power board on the top of the oven, but the cross-flow fan is noisy and prone to failure. For example, the Chinese utility model patent with the patent number of ZL201120306724.0 (authorized announcement number is CN202173286U) discloses an electric oven with a heat dissipation structure. There is also an air outlet on the side wall of the heat dissipation box for external hot air to enter the heat dissipation box. The top wall of the box is provided with an air guide connecting the box body and the heat dissipation box. A cooling fan for discharging the hot air entering the cooling box to the air outlet is installed. The cooling fan adopts a cross-flow fan, and a shroud is fixed on the top wall of the box described in the above patent. The shroud is located between the outlet of the cooling fan and the air outlet of the cooling box. A guide channel is formed between the upper surface of the top wall of the radiator fan and the air outlet of the heat dissipation box, and the air guide port is communicated with the guide channel.

SUMMARY OF THE INVENTION

The first technical problem to be solved by the present invention is to provide a heat dissipation structure for an oven with low noise, long service life and large air output, in view of the prior art.

The second technical problem to be solved by the present invention is to provide a heat dissipation structure for an oven with uniform air discharge in view of the prior art.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a heat dissipation structure for an oven, comprising an air guide hood for covering the top of the box body of the oven, one end of the air guide hood is an air inlet and the other end is an air inlet. It is an air outlet, and a diversion channel is formed between the air inlet and the air outlet. It is characterized in that a centrifugal fan assembly is arranged at the air inlet, and the air outlet port of the centrifugal fan assembly communicates with the air inlet.

Preferably, the centrifugal fan assembly includes a volute cover and an impeller for covering the top of the box of the oven, the air outlet port of the volute case is connected to the air inlet end of the air guide cover, and the impeller is eccentrically arranged on the In the volute cover, the top surface of the volute cover is provided with a circular air inlet port which is arranged concentrically with the impeller. The impeller is eccentrically arranged in the volute cover, so that a large gap can be formed between the impeller and one side of the volute cover, and a large amount of air can be accumulated in the gap. When the impeller rotates, the air in the gap can move along the The tangential direction of the impeller flows out, thereby further increasing the air output of the centrifugal fan assembly.

In order to facilitate the installation of the motor, the centrifugal fan assembly further includes a motor and an installation bracket, the installation bracket is erected on the air inlet port, and the motor is installed on the installation bracket.

Further, the mounting bracket is a plate, which includes a center tray for installing the motor and a support arm, the support arm is formed by horizontally extending outward from the side edge of the center tray, and there are at least two support arms along the The center trays are arranged at intervals in the circumferential direction. In the installed state, the center tray is located at the center of the air inlet port, and the free ends of each support arm are corresponding to the top surface of the volute cover. On the basis of facilitating the installation of the motor, the normal air intake of the air inlet port is ensured, and it is also conducive to the heat dissipation of the motor.

Since the air outlet mode of the centrifugal fan is different from that of the cross-flow fan, the use of the traditional air guide hood will lead to uneven air output, thereby affecting the heat dissipation effect. The width of the air guide hood increases from the air inlet to the air outlet, while the height is The air inlet increases and decreases gradually in the direction of the air outlet, and the air guide hood is provided with an auxiliary air guide channel extending from the air inlet to the direction of the air outlet at the end of the air guide hood. and the air guide auxiliary duct is constricted from the air inlet to the air outlet. In this way, after the air flow out of the air outlet port is introduced into the air guide auxiliary duct, since the air guide auxiliary duct is narrowed from the air inlet to the air outlet direction, part of the air flow introduced into the air guide auxiliary duct is guided to the other side of the air guide hood. , so that the air flow can be relatively evenly distributed on the rear half of the air guide hood, and evenly flow to the front half of the air guide hood, so as to obtain better heat dissipation effect.

Further, the air guide auxiliary duct is evenly constricted from the air inlet to the air outlet direction, so that the airflow entering the air guide auxiliary duct can be evenly flowed to the other side of the air guide channel.

Further, in order to make the airflow entering the air inlet more evenly distributed in the air guide hood, the width of the auxiliary air guide channel is close to each other, and the height of the auxiliary air guide channel decreases uniformly from the air inlet to the air outlet. , so that the airflow can flow evenly to the other side of the windshield.

The air flows out from the air outlet along the tangential direction of the impeller. In order to make the air flow better into the air guide auxiliary duct, the trajectory of the air guide auxiliary duct from the air inlet to the air outlet direction and the intake air flow of the air inlet above. The movement trajectories are matched, so that the airflow can smoothly flow into the air guide auxiliary channel, and the turbulent flow caused by the collision between the airflow and the side wall of the air guide auxiliary channel can be effectively avoided.

Preferably, the air guide cover is provided with an installation position for installing the power board at the air outlet end. Further, the installation position is arranged between the above-mentioned auxiliary air guide channel and the air outlet, and is located in the middle part along the width direction of the air guide cover where it is located, which is formed by the upward protrusion of the cover wall of the wind guide cover this time. In this way, the air flow entering from the air guide auxiliary channel is evenly distributed in the second half of the air guide hood and can continue to flow evenly to the front half of the air guide hood, so that the power board installed in the above-mentioned installation position can be dissipated. its protection.

Compared with the prior art, the present invention has the advantages that a centrifugal fan assembly is arranged at the air inlet of the air guide hood in the present invention, and the air outlet port of the centrifugal fan assembly communicates with the air inlet of the air guide hood. The centrifugal fan assembly is used to provide the air source for the diversion channel. Compared with the existing cross-flow fan, the noise is small, the failure is not easy to occur, and the service life is long, so that the user can obtain a good experience in use. Can obtain better heat dissipation effect.

Description of drawings

Fig. 1 is the structural representation of the oven in the embodiment of the present invention;

Fig. 2 is the schematic diagram of the partial structure of the oven in the embodiment of the present invention;

3 is a cross-sectional view of a partial structure of an oven in an embodiment of the present invention;

4 is an exploded view of the partial structure of the oven in the embodiment of the present invention;

5 is a schematic structural diagram of a mounting bracket in an embodiment of the present invention;

6 is a schematic structural diagram of a volute cover and an air guide cover in an embodiment of the present invention;

Fig. 7 is the structural representation of Fig. 6 in another direction;

8 is a schematic structural view of FIG. 6 in another direction;

9 is a cross-sectional view of FIG. 6 along the A-A direction;

Figure 10 is a simulation diagram of the air field when the wind guide auxiliary road is not provided;

FIG. 11 is a simulation diagram of an aura in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in Figures 1-9, an oven has an upper mounting plate 11 on the top of the box body 1, and the upper mounting plate 11 is provided with a heat dissipation structure 2 that can dissipate heat from devices such as a power board on the top of the oven. The heat dissipation structure 2 includes an air guide cover 3 and a centrifugal fan assembly 4 . The above-mentioned air guide cover 3 is covered on the above-mentioned upper mounting plate 11 , and one end is an air inlet 31 and the other end is an air outlet 32 . The centrifugal fan assembly 4 is disposed at the air inlet 31 , and the air outlet port 412 of the centrifugal fan assembly 4 communicates with the air inlet 31 . The centrifugal fan is used to provide the air source for the diversion channel 30. Compared with the existing cross-flow fan, the noise is small, the failure is not easy to occur, the service life is long, and the user can obtain a good use experience. In addition, the air intake volume is also large, Good heat dissipation effect can be obtained.

The above-mentioned centrifugal fan assembly 4 includes a volute cover 41, an impeller 42, a motor 43 and a mounting bracket 44. The above-mentioned volute cover 41 is disc-shaped and is covered on the upper mounting plate 11, and the above-mentioned impeller 42 is eccentrically arranged on the above-mentioned volute. In the inner cavity of the cover 41 (as shown by the dotted line in FIG. 6 ), the top surface of the volute cover 41 is provided with an air inlet port 411, and the air inlet port 411 is circular and arranged concentrically with the above-mentioned impeller 42, so as to provide an air inlet port 411. The impeller 42 provides an air source, that is, the air inlet port 411 is also eccentrically opened on the top surface of the volute casing 41 . The side of the volute cover 41 is provided with the above-mentioned air outlet port 412 along the tangential direction, and the air outlet port 412 is communicated with the larger space of the volute case 41, so that the centrifugal airflow generated by the rotation of the impeller 42 can be smoothly removed from the air outlet. The air outlet port 412 leads out and enters the air guide hood 3, and the eccentric arrangement of the impeller 42 can allow more air to accumulate in the larger space of the volute cover 41, so that more airflow can enter the air guide hood 3, effectively increasing the The air intake volume of the air guide hood 3 is further improved to obtain a better heat dissipation effect.

In this embodiment, the width of the above-mentioned air guide hood 3 increases from the air inlet 31 to the air outlet 32, and the height increases and decreases from the air inlet 31 to the air outlet 32. Exported from the air outlet 32 . Since the air flows out from the air outlet port 412 along the tangential direction of the impeller 42 , if the airflow is not diverted, most of the air will flow on one side of the air guide hood 3 after passing through the air inlet port 31 , while the other side will flow through the air inlet 31 . less, so that the effect of uniform heat dissipation cannot be achieved. In order to enable the airflow entering from the air inlet 31 to be relatively evenly distributed on the rear half 36 of the air guide hood 3 (ie, the air guide channel 30 ), in this embodiment, the front and rear directions of the air guide hood 5 same. In this embodiment, the wind guide hood 3 is provided with an auxiliary air guide duct 33 extending from the air inlet 31 toward the air outlet 32 at the end of the air inlet 31 . The air guide auxiliary channel 33 is constricted from the air inlet 31 to the air outlet 32 direction. In this way, after the air flow out of the air outlet port 412 is introduced into the auxiliary air guide duct 33, since the auxiliary air guide duct 33 is constricted from the air inlet 31 to the air outlet 32, part of the airflow introduced into the auxiliary air guide duct 33 is diverted. To the other side of the air guide hood 3 or both sides of the air guide auxiliary road 33 (when the air guide auxiliary road 33 is arranged on one side of the air guide hood, the air flow is guided to the other side of the air guide hood 3; when When the air guide auxiliary channel 33 is arranged in the middle of the air guide hood, the air flow is diverted to both sides of the air guide auxiliary channel 33), so that the air flow can be relatively evenly distributed in the rear half 36 of the air guide hood 3, and evenly distributed. The ground flow guides the front half 35 of the windshield 3 to obtain a better heat dissipation effect, as shown by the arrow in FIG. 6 .

The purpose of setting the air guide hood in the oven is to make the air outlet at the front of the oven more uniform through the air guide hood, and then take away the heat on the installation board on the oven, which plays a role in dissipating the heat of the oven. The air guide hood in FIG. 10 is not provided with the above-mentioned auxiliary air guide duct 33 , and it can be seen that the air outlet uniformity is poor, and most of the air volume is concentrated on one side of the air guide hood, while the other side is less. FIG. 11 is a simulation diagram of the present embodiment after the above-mentioned air guide auxiliary road is installed. It can be seen from FIG. 11 that the above-mentioned air guide auxiliary road 33 is installed, and the uniformity of the air outlet is greatly improved. It can be seen that the above-mentioned air guide The auxiliary road 33 has a good guiding effect, so that the air outlet uniformity of the air guide hood 3 is good.

In order to make the airflow entering the air inlet 31 more evenly distributed in the guide channel 3, the air guide auxiliary channel 33 is evenly narrowed from the air inlet 31 to the air outlet 32 direction. Further, the width of the air guide auxiliary channel 33 is approach, and the height of the air guide duct 33 decreases uniformly from the air inlet 31 to the air outlet 32 , so that the airflow can flow evenly to the other side of the air guide hood 3 or both sides of the air guide auxiliary duct 33 . The air flows out from the air outlet port 412 along the tangential direction of the impeller 42. In order to make the air flow better into the air guide auxiliary channel 33, the extension trajectory of the above air guide auxiliary channel 33 from the air inlet 31 to the air outlet 32 direction is the same as the above. The movement trajectories of the intake air flow of the air inlet 31 are matched, so that the air flow can smoothly flow into the air guide auxiliary channel 33 , and turbulence caused by collision of the airflow with the side wall of the air guide auxiliary channel 33 is effectively avoided.

In order to make the air flow in the volute cover 41 better enter the air guide cover 3, preferably, the outlet of the volute cover 41 (ie the above-mentioned air outlet port 412) is connected to the above-mentioned air inlet port 31. Further, this In the embodiment, the volute cover 41 and the air guide cover 3 are integrated, and the air outlet port 412 of the volute cover 41 and the air inlet 31 of the air guide cover 3 are stacked to form an integral structure. In addition, a smooth transition is formed between the top surface of the volute cover 41 and the top surface of the air guide auxiliary channel 33 , that is, the superposition of the air outlet port 412 and the air inlet port 31 is smooth. In addition, in this application, the first side wall 361 of the rear half 36 of the air guide hood 3 is shared with the above-mentioned auxiliary air guide 33, that is, the auxiliary air guide 33 is arranged on one side of the air guide 3, and the rear half 36 The included angle α between the second side wall 362 and the side wall of the air guide auxiliary passage 33 opposite to the second side wall 362 is 53°. Therefore, the airflow entering the auxiliary air guide channel 33 can flow more evenly to the other side of the second half 36 of the guide channel 30 , so that the airflow can be evenly distributed on the second half 36 of the guide channel 30 . In addition, the angle β formed by the side wall adjacent to the air outlet 32 of the volute cover 41 and the second side wall 342 and the second side wall 342 is 42°.

Further, the above-mentioned air guide hood 3 is provided with an installation position 34 for installing the power board at the end of the air outlet 32. Specifically, the installation position 34 is arranged between the above-mentioned air guide auxiliary channel 33 and the air outlet 32, and is located in the air guide hood. 3 along the middle of the width direction, and is formed by the upward protrusion of the cover wall of the wind guide cover 3. In this way, the air flow entering from the air guide auxiliary channel 33 is evenly distributed in the rear half 36 of the air guide hood 3 and can continue to flow evenly to the front half 35 of the air guide hood 3, so that the power supply board installed in the above-mentioned installation position 34 can be installed. Dissipate heat and protect it.

The mounting bracket 44 is erected on the air inlet port 411 , and the motor 43 is mounted on the mounting bracket 44 . Specifically, the mounting bracket 44 is a plate, which includes a center tray 441 for installing the motor 43 and a support arm 442. The support arm 442 is formed by horizontally extending outward from the side edge of the center tray 441. The support arm The number of 442 is at least two and spaced along the circumferential direction of the center tray 441. In the installed state, the center tray 441 is located at the center of the air inlet port 411, and the free ends of the support arms 442 are located at the top of the volute cover 41 respectively. corresponding to the face. In order to stabilize the structure of the mounting bracket 44 , an upwardly extending reinforcing flange 443 is formed on the outer edge of the mounting bracket 44 . In this embodiment, the shape of the center tray 441 is circular, the number of the support arms 442 is three, the included angle between the adjacent support arms 442 is 120°, and each support arm 442 is fixed on the On the top surface of the volute cover 41, since the above-mentioned air inlet port 411 is eccentrically opened on the top surface of the volute cover 41, the free end of one of the support arms 442 forms a fracture, thereby preventing the support arm 442 from protruding outside. The volute cover 41 affects the installation. The center of the center tray 441 is provided with a mounting hole 444 for passing the rotating shaft of the motor 43 therethrough. The installation of the mounting bracket 44 not only facilitates the installation of the motor 43, but also facilitates the connection between the electrical connector of the motor 43 and the power supply board, so that the structure of the mounting plate 11 on the oven is simple and the assemblability of the whole oven is stronger.

Claims (10)

1. The utility model provides a heat radiation structure for oven, is including being used for covering wind scooper (3) of establishing at the box (1) top of oven, and the one end of this wind scooper (3) is air intake (31) and the other end is air outlet (32), forms water conservancy diversion passageway (30) between this air intake (31) and air outlet (32), characterized in that, air intake (31) department is provided with centrifugal fan subassembly (4), and air-out port (412) of this centrifugal fan subassembly (4) communicate with each other with above-mentioned air intake (31).

2. The heat dissipation structure of claim 1, wherein the centrifugal fan assembly (4) comprises a volute casing (41) and an impeller (42) for covering the top of the oven body (1), an air outlet port (412) of the volute casing (41) is connected with an air inlet (31) end of the air guide casing (3), the impeller (42) is eccentrically arranged in the volute casing (41), and a circular air inlet port (411) concentrically arranged with the impeller (42) is formed on the top surface of the volute casing (41).

3. The heat dissipating structure of claim 2, wherein the centrifugal fan assembly (4) further comprises a motor (43) and a mounting bracket (44), the mounting bracket (44) being mounted on the air inlet port (411), and the motor (43) being mounted on the mounting bracket (44).

4. A heat dissipating structure according to claim 3, wherein the mounting bracket (44) is a plate member including a center tray (441) for mounting the motor (43) and support arms (442), the support arms (442) being formed by extending a side edge of the center tray (441) horizontally outward, the support arms (442) being at least two and being provided at intervals along a circumferential direction of the center tray (441), the center tray (441) being located at a center of the air inlet port (411) in a mounted state, and free ends of the support arms (442) being located at respective corresponding positions on a top surface of the volute housing (41).

5. The heat dissipation structure of any one of claims 1 to 4, wherein the width of the wind scooper (3) increases gradually from the wind inlet (31) to the wind outlet (32), and the height decreases gradually from the wind inlet (31) to the wind outlet (32), and a wind guiding auxiliary channel (33) extending from the wind inlet (31) to the wind outlet (32) is disposed at the wind inlet (31) end of the wind scooper (3), the wind guiding auxiliary channel (33) is formed by upward bulging of the cover wall of the wind scooper (3), and the wind guiding auxiliary channel (33) is shrunk from the wind inlet (31) to the wind outlet (32).

6. The heat dissipation structure of claim 5, wherein the air guide auxiliary channel (33) is uniformly contracted from the air inlet (31) to the air outlet (32).

7. The heat dissipation structure of claim 6, wherein the width of each part of the air guide auxiliary channel (33) is close, and the height of the air guide auxiliary channel (33) is uniformly decreased from the air inlet (31) to the air outlet (32).

8. The heat dissipation structure of claim 7, wherein the trajectory of the air guide auxiliary channel (33) from the air inlet (31) to the air outlet (32) matches the movement trajectory of the intake airflow of the air inlet (31).

9. The heat dissipation structure of claim 5, wherein the wind scooper (3) is provided with a mounting location (34) for mounting a power board at the wind outlet (32) end.

10. The heat dissipation structure of claim 9, wherein the mounting location (34) is disposed between the air guide duct (33) and the air outlet (32), and the mounting location (34) is located in a middle portion of the air guide cover (3) in a width direction and is formed by upward protruding of a cover wall of the air guide cover (3).

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