Cushion frame of cooking utensil

Abstract

The cushion frame comprises a cushion plate, a plurality of supporting legs arranged at intervals are arranged on the lower side of the cushion plate, a plurality of supporting ribs arranged at intervals are arranged on the upper side of the cushion plate, the supporting ribs are used for supporting a stewing cup, convection holes are formed in the center area of the cushion plate, and the cushion plate is arranged in a rising mode from the convection holes to the outer edge. The cushion frame is used in a cooking utensil for stewing in water, a hot area with high water temperature is formed near the edge of the cushion plate during working, a cold area with low temperature is formed in an area between the lower portion of a stewing cup and the upper portion of the cushion plate, water in the cold area can flow to the lower portion of the cushion plate through the convection holes, and water flow, close to the central area, below the cushion plate can flow towards the outer edge of the cushion plate. The water flowing out of the outer edge of the base plate flows upwards. Water flow near the outer edge of the base plate and located above the base plate can flow towards the center of the base plate, so that the cold area and the hot area are communicated with each other to form circulating heat convection, water in the heating cavity of the cooking utensil can be heated more quickly, and the overall heat efficiency of the cooking utensil is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and in particular to a support frame of a cooking utensil. Background Art

[0002] When a stew pot is placed in a cooking utensil for water-proof stewing, a large number of small bubbles generated on the surface of the heating plate will directly impact the bottom of the stew pot, causing the stew pot to produce shaking noises. At the same time, the bubbles will also produce noises when they break during impact. Currently, in order to solve this problem, a support frame is mostly provided between the heating plate and the stew pot. However, the support frame is provided as a whole support plate, which affects the heat convection of the water body, thereby affecting the heating efficiency of the food in the stew pot. Utility Model Content

[0003] Based on this, it is necessary to provide a support frame for a cooking utensil to at least solve one of the above problems.

[0004] The present application provides a support frame for a cooking utensil, the cooking utensil comprising a base, a stew pot, an upper cover and a heating plate, the base being provided with a heating cavity, the stew pot and the support frame being arranged in the heating cavity, the heating plate being arranged on the bottom wall of the heating cavity, the upper cover being covered on the base to cover the heating cavity, the support frame comprising a pad, a plurality of spaced-apart supporting feet being arranged on the lower side of the pad, a plurality of spaced-apart supporting ribs being arranged on the upper side of the pad, the supporting ribs being used to support the stew pot, a convection hole being arranged in the central area of the pad, and the pad being arranged in an ascending shape from the convection hole to the outer edge.

[0005] The cushion rack provided by the present application is used in a cooking appliance for water-bath stewing. The stewing pot is supported by support ribs. During operation, a large number of bubbles are generated in the water body in the heating cavity of the cooking appliance. The bubbles carry a large amount of heat energy. Under the guiding action of the upwardly arranged base plate, the bubbles below the base plate will flow upward along the lower surface of the base plate to the outer edge of the base plate. At the same time, the water flow below the base plate will flow towards the outer edge of the base plate, so that a hot zone with a relatively high water temperature is formed near the outer edge of the base plate, while a cold zone with a relatively low temperature is formed in the area between the lower part of the stewing pot and the upper part of the base plate. Thus, two regions with obvious temperature differences are formed in the water body in the heating cavity. Since the water molecules in the hot zone are active and have a relatively small density, they will flow upward, and the water in the cold zone will flow downward due to its relatively large density. Since a convection hole is provided in the central area of the base plate, the water in the cold zone can flow to the lower part of the base plate through the convection hole. And since a plurality of spaced-apart feet are provided on the lower side of the base plate, the water flow near the central area below the base plate can flow towards the outer edge of the base plate and pass through the gaps between the feet. The water flow flowing outside the edge of the base plate is in the hot zone, and the water molecules are active and flow upward. Since a plurality of spaced-apart support ribs are provided on the upper side of the base plate, the water flow near the outer edge of the base plate and above the base plate can flow towards the center of the base plate along the space between the upper surface of the base plate and the bottom surface of the stewing pot. Thus, the cold zone and the hot zone are interconnected to form a circulating heat convection, so that the water body in the heating cavity can be heated faster, and the overall thermal efficiency of the cooking appliance is improved.

[0006] In one embodiment, a first guiding surface is provided on the lower surface of the base plate, and the first guiding surface is an inclined surface, a conical surface or an arc surface; and / or, a second guiding surface is provided on the upper surface of the base plate, and the second guiding surface is an inclined surface, a conical surface or an arc surface.

[0007] In this way, under the guiding action of the first guiding surface, the water flow and bubbles below the base plate are prone to flow towards the outer edge of the base plate, which is beneficial to forming a heat convection cycle, and the bubbles can escape from the outer edge of the base plate, reducing the occurrence of bubble aggregation on the lower surface of the base plate and the impact of the bubbles on the lower surface of the base plate. Under the guiding action of the second guiding surface, the water flow above the base plate is prone to flow towards the center of the base plate, which is beneficial to forming a heat convection cycle.

[0008] In one embodiment, a first baffle rib is further provided in the central area of the base plate, the first baffle rib surrounds the convection hole, and the first baffle rib protrudes downward relative to the lower surface of the base plate.

[0009] In this way, by providing the first baffle rib, the bubbles can be intercepted to prevent the bubbles below the base plate from directly escaping from the convection hole.

[0010] In one embodiment, the feet are connected to the outer edge or the bottom surface of the base plate, and the bottom end of the first baffle rib is higher than the bottom end of the feet.

[0011] In this way, when the cushion rack is placed in the heating cavity, the first rib does not contact the disc body, so that the water flow flowing down from the convection holes can flow over the first rib from below to the outer edge of the cushion plate, ensuring the heat convection cycle in the heating cavity.

[0012] In one embodiment, the heating disc includes a disc body and a heating tube disposed below the disc body, and the orthographic projection of the heating tube on the horizontal plane is located between the orthographic projection of the first rib and the outer edge of the cushion plate on the horizontal plane.

[0013] In this way, when a large number of bubbles generated by the heating tube heating the water body rise, they are located outside the first rib, so that the first rib can block the bubbles and prevent the bubbles from escaping through the convection holes.

[0014] In one embodiment, a guide rib extending upward is provided at the outer edge of the cushion plate.

[0015] In this way, setting the guide rib is beneficial to guiding the bubbles and the water flow to flow upward, thus facilitating the improvement of the heat convection cycle.

[0016] In one embodiment, a plurality of bubble-breaking channels are circumferentially spaced along the outer edge of the cushion plate.

[0017] In this way, the bubbles flowing to the vicinity of the outer edge of the cushion plate under the guiding action of the first guiding surface can escape through the bubble-breaking channels. When passing through the bubble-breaking channels, the bubbles can be broken into smaller bubbles, so that the noise is relatively small when the bubbles float out of the water surface and burst. It can be seen that setting the bubble-breaking channels can reduce the noise.

[0018] In one embodiment, a second rib extending downward is provided at the outer edge of the cushion plate.

[0019] Setting the second rib can prevent the bubbles from escaping directly from the outer edge of the cushion plate without passing through the bubble-breaking channels. Since the bubbles escaping directly from the outer edge of the cushion plate are relatively large in volume and the cracking noise is also relatively large, in this embodiment, by setting the second rib, the situation of bubbles escaping directly from the outer edge of the cushion plate can be reduced, so that the bubbles pass through the bubble-breaking channels and are broken before rising upward, thereby further reducing the noise.

[0020] In one embodiment, the bubble-breaking channels are provided on the cushion plate and longitudinally penetrate the upper and lower side surfaces of the cushion plate, and the bubble-breaking channels are located inside the second rib; and / or, the bubble-breaking channels are provided on the second rib and horizontally penetrate the inner and outer side surfaces of the second rib.

[0021] In this way, the bubble-breaking channels are provided on the backing plate. When the bubbles are guided to the vicinity of the outer edge of the backing plate, they are blocked by the second baffle ribs, and thus can easily escape upward through the bubble-breaking channels on the backing plate. Therefore, the bubble-breaking channels can play a very good role in breaking the bubbles. The bubble-breaking channels are provided on the second baffle ribs. When the bubbles are guided to the vicinity of the edge of the backing plate, they can escape outward through the bubble-breaking channels on the second baffle ribs. Therefore, the bubble-breaking channels can play a role in breaking the bubbles, and the stew pot will not block the bubbles escaping from the bubble-breaking channels, avoiding the noise generated by the bubbles hitting the stew pot.

[0022] In one embodiment, the bottom surface of the stew pot has a planar region. The bubble-breaking channels are provided on the backing plate and longitudinally penetrate the upper and lower side surfaces of the backing plate. The bubble-breaking channels are located outside the planar region.

[0023] In this way, the bubbles discharged through the bubble-breaking channels are not blocked by the bottom surface of the stew pot and do not aggregate again, reducing the probability of bubbles aggregating at the bottom of the stew pot, making the noise smaller when the cooking appliance performs the double-boiling operation.

[0024] In one embodiment, a first guiding surface is provided on the lower surface of the backing plate. The bubble-breaking channels include a gradually converging section, an equal-diameter section, and a gradually expanding section that are connected in sequence. Among them, the gradually converging section is arranged close to the first guiding surface. In the direction from one end of the bubble-breaking channel close to the first guiding surface to the other end, the gradually converging section is in a converging shape, the inner diameter of the equal-diameter section remains unchanged, and the gradually expanding section is in an expanding shape.

[0025] In this way, after the bubbles are guided to the vicinity of the outer edge of the backing plate, they sequentially pass through the gradually converging section, the equal-diameter section, and the gradually expanding section, and finally escape from the gradually expanding section. Among them, the gradually converging section can accelerate the heat convection of the fluid, form a negative pressure, thereby attracting the bubbles to flow into the bubble-breaking channels. After passing through the gradually converging section, the bubbles are compressed to the same diameter as the equal-diameter section, and then the bubbles enter the gradually expanding section. The bubbles are sheared by turbulence in the gradually expanding section and are tightly broken into small bubbles and leave the bubble-breaking channels.

[0026] In one embodiment, a plurality of the support ribs are circumferentially arranged on the upper surface of the backing plate. The backing plate is further provided with a first reinforcing rib and a second reinforcing rib. The first reinforcing rib connects two adjacent support ribs. One end of the second reinforcing rib is connected to the side of the support rib away from the convection hole, and the other end extends towards the circumferential edge of the backing plate.

[0027] In this way, a plurality of support ribs are circumferentially arranged on the upper surface of the backing plate, which can stably support the stew pot. The first reinforcing rib and the second reinforcing rib are arranged on the backing plate, enhancing the structural strength of the support ribs, making the support ribs not easily deformed. Therefore, the pad rack can more stably support the stew pot, and the spacing between the support ribs is ensured, ensuring the heat convection effect.

[0028] In one of the embodiments, the distance between the outer circumferential wall of the pad rack and the inner wall of the heating chamber is L2, and L2 is 3 mm to 40 mm.

[0029] In this way, it is ensured that there is enough clearance between the pad rack and the heating chamber, which is conducive to the water flow flowing from the lower surface of the pad to the upper surface of the pad together with the bubbles, thus facilitating the convective heat transfer of the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Exploded view of a cooking appliance according to an embodiment of the present application;

[0032] Figure 2 Cross-sectional view of a cooking appliance according to an embodiment of the present application;

[0033] Figure 3 For Figure 2 Partial structural schematic diagram;

[0034] Figure 4 Stereogram of the back side view of a pad rack according to an embodiment of the present application;

[0035] Figure 5 Stereogram of the front side view of a pad rack according to an embodiment of the present application;

[0036] Figure 6 Cross-sectional view of a pad rack according to an embodiment of the present application;

[0037] Figure 7 For Figure 6 Partial enlarged view at the broken bubble channel;

[0038] Figure 8 Structural schematic diagram of a heating plate according to an embodiment of the present application;

[0039] Figure 9 Stereogram of the back side view of a pad rack according to another embodiment of the present application;

[0040] Figure 10 For Figure 9 Stereogram of the front side view of the pad rack shown;

[0041] Figure 11 For Figure 9 Cross-sectional view of the pad rack shown.

[0042] Reference numerals: 100, base; 110, heating chamber; 120, hot zone; 130, cold zone; 200, stewing pot; 210, planar region; 300, upper cover; 400, heating plate; 410, plate body; 420, heating tube; 500, pad rack; 10, backing plate; 11, first guiding surface; 12, second guiding surface; 13, convection hole; 14, guiding rib; 20, supporting leg; 30, first retaining rib; 40, second retaining rib; 50, broken bubble channel; 53, converging section; 54, equal-diameter section; 55, diverging section; 60, supporting rib; 63, first reinforcing rib; 64, second reinforcing rib. Detailed implementation manners

[0043] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0046] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first feature is in direct contact with the second feature or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0047] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application pertains. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0048] Please refer to Figures 1 to 3 , this application provides a cooking appliance, including: a base 100, a stew pot 200, an upper cover 300, and a heating plate 400. A heating cavity 110 is provided inside the base 100. The stew pot 200 is disposed in the heating cavity 110. The heating plate 400 is disposed on the bottom wall of the heating cavity 110. The upper cover 300 covers the base 100 to cover the heating cavity 110. The cooking appliance provided by this application is an electric slow cooker, but is not limited thereto. In other embodiments, the cooking appliance may also be a rice cooker or other cooking appliances having a function of stewing food in water.

[0049] Please refer to Figures 1 to 6, the present application also provides a pad 500 for a cooking appliance. The pad 500 is disposed in the heating cavity 110 and is used to support the stew pot 200. Specifically, the pad 500 includes a base plate 10. A plurality of spaced-apart support feet 20 are provided on the lower side of the base plate 10. A plurality of spaced-apart support ribs 60 are provided on the upper side of the base plate 10. The support ribs 60 are used to support the stew pot 200. A convection hole 13 is provided in the central region of the base plate 10. The base plate 10 is arranged in a rising shape from the convection hole 13 to the outer edge. The pad 500 provided in the present application is used in a cooking appliance for stewing with water separation. The stew pot 200 is supported by the support ribs 60. During operation, a large number of bubbles will be generated in the water body in the heating cavity 110 of the cooking appliance. The bubbles carry a large amount of heat energy. Under the guiding action of the rising base plate 10, the bubbles below the base plate 10 will flow upward along the lower surface of the base plate 10 to the outer edge of the base plate 10. At the same time, the water flow below the base plate 10 will flow towards the outer edge of the base plate 10, so that a hot zone 120 with a relatively high water temperature is formed near the outer edge of the base plate 10 (i.e., near the side wall of the heating cavity 110), while a cold zone 130 with a relatively low temperature is formed in the region between the lower part of the stew pot 200 and the upper part of the base plate 10. Thus, two regions with an obvious temperature difference are formed in the water body in the heating cavity 110. Since the water molecules in the hot zone 120 are active and have a relatively small density, they will flow upward. The water in the cold zone 130 has a relatively large density and will flow downward. Since the convection hole 13 is provided in the central region of the base plate 10, the water in the cold zone 130 can flow to the lower part of the base plate 10 through the convection hole 13. And since a plurality of spaced-apart support feet 20 are provided on the lower side of the base plate 10, the water flow near the central region below the base plate 10 can flow towards the outer edge of the base plate 10 and pass through the gaps between the support feet 20. The water flow flowing outside the outer edge of the base plate 10 is in the hot zone 120, and the water molecules are active and flow upward. Since a plurality of spaced-apart support ribs 60 are provided on the upper side of the base plate 10, therefore, the water flow near the outer edge of the base plate 10 and above the base plate 10 can flow towards the center of the base plate 10 along the space between the upper surface of the base plate 10 and the bottom surface of the stew pot 200, thus realizing the interconnection between the cold zone 130 and the hot zone 120, forming a circulating heat convection, so that the water body in the heating cavity 110 can be heated faster, and the overall thermal efficiency of the cooking appliance is improved. Figure 2 In the figure, S represents the water level line; P represents the bubble path; Q represents the heat convection path.

[0050] Further, please refer to Figure 4 , a first guiding surface 11 is provided on the lower surface of the base plate 10. The first guiding surface 11 is an inclined surface, a conical surface or an arc surface. Thus, under the guiding action of the first guiding surface 11, the water flow and bubbles below the base plate 10 are easy to flow towards the outer edge of the base plate 10, which is beneficial to forming a heat convection cycle, and the bubbles can escape from the outer edge of the base plate 10, reducing the situation where the bubbles aggregate on the lower surface of the base plate 10 and impact the lower surface of the base plate 10.

[0051] Further, please refer toFigure 6 The vertical section of the first flow guiding surface 11 is a first oblique line, and the included angle between the first oblique line and the horizontal plane is γ1, where γ1 is 1° to 30°. In this way, the first flow guiding surface 11 is conducive to guiding the bubbles to the outer edge of the base plate 10, and the water flow can flow to the outer edge of the base plate 10 together with the bubbles. Specifically, γ1 can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, or any other value within the range of 1° to 30°.

[0052] Further, please refer to Figure 5 On the upper surface of the base plate 10, there is a second flow guiding surface 12, and the second flow guiding surface 12 is an inclined surface, a conical surface or an arc surface. In this way, under the guiding action of the second flow guiding surface 12, the water flow above the base plate 10 easily flows towards the center of the base plate 10, thus facilitating the formation of a heat convection cycle.

[0053] Further, please refer to Figure 6 The vertical section of the second flow guiding surface 12 is a second oblique line, and the included angle between the second oblique line and the horizontal plane is γ2, where γ2 is 1° to 30°. In this way, the second flow guiding surface 12 is conducive to guiding the water flow to the center of the base plate 10, promoting the water flow in the hot zone 120 to flow towards the cold zone 130, thereby improving the heat exchange efficiency. Specifically, γ2 can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, or any other value within the range of 1° to 30°.

[0054] Preferably, the first flow guiding surface 11 and the second flow guiding surface 12 are arranged in parallel. In this way, it is not only conducive to the heat convection cycle, but also the structure of the base plate 10 is very simple.

[0055] Please refer to Figure 5 A plurality of support ribs 60 are circumferentially arranged on the upper surface of the base plate 10. In this way, the plurality of support ribs 60 can stably support the stew pot 200.

[0056] Further, a first reinforcing rib 63 and a second reinforcing rib 64 are also provided on the backing plate 10. The first reinforcing rib 63 connects two adjacent supporting ribs 60, and one end of the second reinforcing rib 64 is connected to the side of the supporting rib 60 away from the convection holes 13, and the other end extends towards the circumferential edge of the backing plate 10. In this way, the structural strength of the supporting rib 60 is enhanced, making the supporting rib 60 not easily deformed. Thus, the pad rack 500 can support the stew pot 200 more stably, and the distance between the supporting ribs 60 is ensured, guaranteeing the heat convection effect.

[0057] Please refer to Figures 2 to 4 , a first baffle rib 30 is also provided in the central area of the backing plate 10. The first baffle rib 30 surrounds the convection holes 13 and protrudes downward relative to the lower surface of the backing plate 10. In this way, by providing the first baffle rib 30, air bubbles can be intercepted to prevent the air bubbles below the backing plate 10 from directly escaping from the convection holes 13.

[0058] Please refer to Figure 3 and Figure 8 , the heating plate 400 includes a plate body 410 and a heating tube 420 provided below the plate body 410. The orthographic projection of the heating tube 420 on the horizontal plane is located between the orthographic projection of the first baffle rib 30 and the orthographic projection of the outer edge of the backing plate 10 on the horizontal plane, that is, the orthographic projection of the heating tube 420 on the horizontal plane is located outside the orthographic projection of the first baffle rib 30 on the horizontal plane and inside the orthographic projection of the outer edge of the backing plate 10 on the horizontal plane. In this way, when a large number of air bubbles generated by the heating tube 420 heating the water body rise, they are located outside the first baffle rib 30, so that the first baffle rib 30 can block the air bubbles and prevent the air bubbles from escaping from the convection holes 13.

[0059] Further, please refer to Figure 6 , the height H1 of the first baffle rib 30 protruding from the lower surface of the backing plate 10 is 2 mm to 15 mm. In this way, it can be ensured that the first baffle rib 30 can intercept the air bubbles on the lower surface of the backing plate 10 and prevent the air bubbles from passing over the first baffle rib 30 and escaping from the convection holes 13. Specifically, H1 can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, or any other arbitrary value within the range of 2 mm to 15 mm.

[0060] Further, please refer to Figure 3, the height difference between the bottom end of the first retaining rib 30 and the bottom end of the support leg 20 is L1, and L1 is 3 mm to 20 mm. It can be understood that if the height difference between the bottom end of the first retaining rib 30 and the bottom end of the support leg 20 is L1, then when the cushion rack 500 is placed in the heating cavity 110, the distance between the bottom end of the first retaining rib 30 and the top surface of the heating plate 400 is also L1. If this distance L1 is too small, the water flow flowing downward from the convection hole 13 is difficult to flow from below the first retaining rib 30 to the side wall of the heating cavity 110, thus affecting the heat convection cycle; if this distance L1 is too large, the cushion rack 500 will occupy a relatively large space, resulting in the height of the stewing pot 200 not being able to be set too high or the need to increase the height dimension of the electric stewing pot. In this embodiment, L1 is 3 mm to 20 mm, which neither affects the heat convection cycle of the water flow nor has too much impact on the overall dimensions of the stewing pot 200 or the electric stewing pot. Specifically, L1 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or any other arbitrary value within the range of 3 mm to 20 mm.

[0061] Further, the support leg 20 is connected to the outer edge or the bottom surface of the backing plate 10, and the bottom end of the first retaining rib 30 is higher than the bottom end of the support leg 20. In this way, when the cushion rack 500 is placed in the heating cavity 110, the first retaining rib 30 does not contact the disk body 410, so that the water flow flowing down from the convection hole 13 can flow over the first retaining rib 30 from below to the outer edge of the backing plate 10, ensuring the heat convection cycle in the heating cavity 110.

[0062] Please refer to Figure 4 , in one embodiment, the support leg 20 is connected to the outer edge of the backing plate 10. In this way, the support leg 20 does not affect the flow of the bubbles on the first guiding surface 11, and the support leg 20 is arranged at this position to stably support the backing plate 10, thereby stably supporting the stewing pot 200.

[0063] Please refer to Figures 9 to 11 , in another embodiment, a plurality of support legs 20 are arranged on the lower surface of the backing plate 10 corresponding to a plurality of support ribs 60. In this way, the support centers of the support ribs 60 and the support legs 20 are on the same vertical line, so that the cushion rack 500 is not easily deformed and can stably support the stewing pot 200.

[0064] Of course, in other embodiments, the support legs 20 can also be arranged on the outer edge and the lower surface of the backing plate 10 at the same time, or the support legs 20 can also be arranged at other positions, as long as the support legs 20 can stably support the backing plate 10.

[0065] Please refer to Figures 4 to 6In one embodiment, a plurality of bubble-breaking channels 50 are provided at intervals along the circumferential direction near the outer edge of the pad 10. In this way, bubbles flowing to the outer edge of the pad 10 under the guiding effect of the first guide surface 11 can escape through the bubble-breaking channels 50, and the bubbles can be broken into smaller bubbles when passing through the bubble-breaking channels 50, so that the noise is small when the bubbles float to the surface and burst. It can be seen that the provision of the bubble-breaking channels 50 can reduce noise.

[0066] Furthermore, a second baffle 40 extending downward is provided at the outer edge of the pad 10. The second baffle 40 can prevent bubbles from escaping directly from the outer edge of the pad 10 without passing through the bubble crushing channel 50. Since bubbles escaping directly from the outer edge of the pad 10 are larger in volume and have a larger noise when they burst, the second baffle 40 in this embodiment can reduce the occurrence of bubbles escaping directly from the outer edge of the pad 10, so that the bubbles are broken through the bubble crushing channel 50 and then escape upward, thereby further reducing the noise.

[0067] See also Figure 4 and Figure 5 In one embodiment, the bubble-breaking channel 50 is provided on the pad 10 and vertically penetrates the upper and lower side surfaces of the pad 10. The bubble-breaking channel 50 is located on the inner side of the second baffle 40. In this way, when the bubbles are directed to the outer edge of the pad 10, they are blocked by the second baffle 40, so that they can easily pass through the bubble-breaking channel on the pad 10 and escape upward, so that the bubble-breaking channel 50 can play a good role in breaking the bubbles. In another embodiment (not shown), the bubble-breaking channel 50 is provided on the second baffle 40 and horizontally penetrates the inner and outer side surfaces of the second baffle 40. In this way, when the bubbles are directed to the edge of the pad 10, they can pass through the bubble-breaking channel 50 on the second baffle 40 and escape outward, so that the bubble-breaking channel 50 can play a role in breaking the bubbles, and the stewing pot 200 will not block the bubbles escaping from the bubble-breaking channel 50, so as to avoid the bubbles hitting the stewing pot 200 and generating noise. It is not limited to this. In other embodiments, the bubble-breaking channel 50 can be provided on the pad 10 and the second baffle 40 at the same time.

[0068] like Figure 6 As shown, the height of the second baffle 40 protruding from the lower surface of the pad 10 is H2, and H2 is 2mm to 15mm. In this way, it can be ensured that the second baffle 40 can intercept the bubbles on the lower surface of the pad 10, and prevent the bubbles from crossing the second baffle 40 and escaping directly from the outer edge of the pad 10 to affect the bubble crushing efficiency. Specifically, H2 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, or any other value within the range of 2mm to 15mm. Since bubbles will partially aggregate when flowing through the first guide surface 11, it is preferred that H2 ≥ H1 to ensure that the bubbles will not escape directly from the outer edge of the pad 10, thereby ensuring the bubble crushing effect of the bubble crushing channel 50 on the bubbles.

[0069] Please refer to Figure 7 , in one embodiment, the bubble-breaking channel 50 includes a gradually converging section 53, an equal-diameter section 54, and a gradually diverging section 55 that are connected in sequence. Among them, the gradually converging section 53 is disposed close to the first guiding surface 11. In the direction from the end of the bubble-breaking channel 50 close to the first guiding surface 11 to the other end, the gradually converging section 53 is in a converging shape, the inner diameter of the equal-diameter section 54 remains unchanged, and the gradually diverging section 55 is in a diverging shape. In this way, after the bubbles are guided to the vicinity of the outer edge of the backing plate 10, they sequentially pass through the gradually converging section 53, the equal-diameter section 54, and the gradually diverging section 55, and finally escape from the gradually diverging section 55. Among them, the gradually converging section 53 can accelerate the heat convection of the fluid and form a negative pressure, thereby attracting the bubbles to flow into the bubble-breaking channel 50. After passing through the gradually converging section 53, the bubbles are compressed to the same diameter as the equal-diameter section 54, and then the bubbles enter the gradually diverging section 55. The bubbles are sheared by turbulence in the gradually diverging section 55 and are tightly fractured into small bubbles and leave the bubble-breaking channel 50. However, this is not limited thereto. In other embodiments, the bubble-breaking channel 50 may also include any one or two of the gradually converging section 53, the equal-diameter section 54, and the gradually diverging section 55. In addition, the bubble-breaking channel 50 may also be in other forms, as long as the bubble-breaking channel 50 has a bubble-breaking effect on the bubbles, so that the bubbles can become smaller bubbles after passing through the bubble-breaking channel 50.

[0070] In addition, the cushion support 500 may not be provided with the bubble-breaking channel 50. Please refer to Figures 9 to 11 , in another embodiment, a guiding rib 14 extending upward is provided at the outer edge of the backing plate 10. In this way, the provision of the guiding rib 14 is beneficial to guiding the bubbles and the water flow to flow upward, thereby facilitating the improvement of the heat convection cycle. During use, the stew pot 200 is placed on the supporting rib 60 of the backing plate 10, and the size of the stew pot 200 does not exceed the outer diameter of the guiding rib 14, that is, the stew pot 200 is located inside the guiding rib 14. In this way, when the bubbles flow upward along the guiding rib 14, they will not be blocked at the bottom surface of the stew pot 200, but will float smoothly to the water surface and break, thereby avoiding the aggregation of bubbles at the bottom surface of the stew pot 200 and the impact on the bottom surface of the stew pot 200. It can be understood that in the solution where the guiding rib 14 extending upward is provided at the outer edge of the backing plate 10, the bubble-breaking channel 50 penetrating the upper and lower side surfaces may also be provided on the backing plate 10. In this way, some bubbles can be broken through the bubble-breaking channel 50 and then escape upward, so that both the heat convection cycle can be improved and the noise can be reduced.

[0071] Please refer to Figure 3, the distance between the outer circumferential wall of the pad rack 500 and the inner wall of the heating chamber 110 is L2, and L2 is 3 mm to 40 mm. In this way, it is ensured that there is enough clearance between the pad rack 500 and the heating chamber 110, which is conducive to the water flow flowing from the lower surface of the base plate 10 to the upper surface of the base plate 10 together with the bubbles, thus facilitating the convective heat transfer of the water flow. Specifically, L2 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 230 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, or any other value within the range of 3 mm to 40 mm.

[0072] Please refer to Figure 2 and Figure 3 , the bottom surface of the stewing pot 200 has a flat area 210, the bubble-breaking channel 50 is provided on the base plate 10 and longitudinally penetrates the upper and lower side surfaces of the base plate 10, and the bubble-breaking channel 50 is located outside the flat area 210. In this way, the bubbles discharged through the bubble-breaking channel 50 are not blocked by the bottom surface of the stewing pot 200 and reunite again, reducing the probability of bubble aggregation at the bottom of the stewing pot 200, and making the noise smaller when the cooking appliance performs the water-bath stewing operation.

[0073] In this embodiment, please refer to Figure 4 and Figure 5 , the base plate 10 is square, and bubble-breaking channels 50 are provided on all four sides of the base plate 10. Please refer to Figure 3 , the distance between the bubble-breaking channels 50 on the opposite sides of the base plate 10 is L3, and the diameter of the flat area 210 on the bottom surface of the stewing pot 200 is D, and D < L3. In this way, it can be ensured that the bubble-breaking channel 50 is located outside the flat area 210. Preferably, D = [1 / 3*L3, 2 / 3*L3].

[0074] Of course, in other embodiments, the base plate 10 can also be of other shapes, such as circular. The base plate 10 can also be provided with bubble-breaking channels 50 only on one side edge, as long as the bubble-breaking channels 50 are provided outside the flat area 210 on the bottom surface of the stewing pot 200.

[0075] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0076] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the appended claims.

Claims

1. A pad rack for a cooking appliance, the cooking appliance comprising a base (100), a stewing pot (200), an upper lid (300) and a heating plate (400), wherein a heating cavity (110) is provided in the base (100), the stewing pot (200) and the pad rack (500) are arranged in the heating cavity (110), the heating plate (400) is arranged on the bottom wall of the heating cavity (110), and the upper lid (300) covers the base (100) to cover the heating cavity (110), characterized in that, The cushion rack (500) includes a cushion plate (10). A plurality of spaced-apart supporting feet (20) are provided on the lower side of the cushion plate (10). A plurality of spaced-apart supporting ribs (60) are provided on the upper side of the cushion plate (10). The supporting ribs (60) are used to support the stew pot (200). A convection hole (13) is provided in the central area of the cushion plate (10). The cushion plate (10) is arranged in a rising shape from the convection hole (13) towards the outer edge.

2. The mounting bracket according to claim 1, wherein, A first guiding surface (11) is provided on the lower surface of the cushion plate (10). The first guiding surface (11) is an inclined surface, a conical surface or an arc surface. And / or, a second guiding surface (12) is provided on the upper surface of the cushion plate (10). The second guiding surface (12) is an inclined surface, a conical surface or an arc surface.

3. The pad rack according to claim 1, characterized in that, A first retaining rib (30) is further provided in the central area of the cushion plate (10). The first retaining rib (30) surrounds the convection hole (13), and the first retaining rib (30) protrudes downward relative to the lower surface of the cushion plate (10).

4. The mounting bracket according to claim 3, characterized in that, The supporting feet (20) are connected to the outer edge or the bottom surface of the cushion plate (10). The bottom end of the first retaining rib (30) is higher than the bottom end of the supporting feet (20).

5. The mounting bracket according to claim 3, wherein The heating plate (400) includes a plate body (410) and a heating tube (420) provided below the plate body (410). The orthographic projection of the heating tube (420) on the horizontal plane is located between the orthographic projection of the first retaining rib (30) and the orthographic projection of the outer edge of the cushion plate (10) on the horizontal plane.

6. The mounting bracket according to claim 1, wherein A guiding rib (14) extending upward is provided at the outer edge of the cushion plate (10).

7. The mounting bracket according to claim 1, characterized in that, A plurality of bubble-breaking channels (50) are provided at intervals along the circumference near the outer edge of the cushion plate (10).

8. The pad rack according to claim 7, characterized in that, A second retaining rib (40) extending downward is provided at the outer edge of the cushion plate (10).

9. The spacer according to claim 8, characterized in that, The bubble-breaking channels (50) are provided on the cushion plate (10) and longitudinally penetrate the upper and lower side surfaces of the cushion plate (10). The bubble-breaking channels (50) are located inside the second retaining rib (40). And / or, the bubble-breaking channels (50) are provided on the second retaining rib (40) and horizontally penetrate the inner and outer side surfaces of the second retaining rib (40).

10. The mounting bracket according to claim 7, characterized in that, The bottom surface of the stew pot (200) has a flat area (210). The bubble-breaking channels (50) are provided on the cushion plate (10) and longitudinally penetrate the upper and lower side surfaces of the cushion plate (10). The bubble-breaking channels (50) are located outside the flat area (210).

11. The mounting bracket according to any one of claims 7-10, characterized in that, A first guiding surface (11) is provided on the lower surface of the cushion plate (10). The bubble-breaking channel (50) includes a gradually converging section (53), an equal-diameter section (54) and a gradually expanding section (55) connected in sequence. Among them, the gradually converging section (53) is arranged close to the first guiding surface (11). In the direction from one end of the bubble-breaking channel (50) close to the first guiding surface (11) to the other end, the gradually converging section (53) is in a converging shape, the inner diameter of the equal-diameter section (54) remains unchanged, and the gradually expanding section (55) is in an expanding shape.

12. The mounting bracket according to claim 1, characterized in that, A plurality of the supporting ribs (60) are circumferentially arranged on the upper surface of the backing plate (10). The backing plate (10) is further provided with a first reinforcing rib (63) and a second reinforcing rib (64). The first reinforcing rib (63) connects two adjacent supporting ribs (60). One end of the second reinforcing rib (64) is connected to the side of the supporting rib (60) away from the convection hole (13), and the other end extends towards the circumferential edge of the backing plate (10).

13. The underframe according to claim 1, characterized in that, The distance between the outer wall on the circumferential side of the pad holder (500) and the inner wall of the heating cavity (110) is L2, and L2 is 3 mm to 40 mm.

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