Cooking equipment

Abstract

The invention provides cooking equipment which comprises a door assembly, the door assembly comprises a door body, a shielding plate and a sealing ring, the sealing ring is connected with the shielding plate, sealing can be formed between the door body and the shielding plate, a drainage hole is formed in the lower section of a ring body of the sealing ring, and the shielding plate is provided with a drainage groove corresponding to the drainage hole. The drainage groove is arranged below the drainage hole; according to the cooking equipment, when condensed water flows to the position of the sealing ring, the condensed water can be further drained along the drainage hole and the drainage groove and cannot be gathered and accumulated at the position of the sealing ring for a long time, the coating of the door body cannot make contact with the condensed water for a long time, the normal use environment of the coating is guaranteed, the service life of the coating can be effectively guaranteed, and the service life of the door body is prolonged. And the microwave leakage problem caused by premature falling of the coating and premature rusting and cracking of the door body is avoided, so that the overall service life of the cooking equipment is guaranteed, and the use safety of a user is protected.

Description

Technical Field

[0001] The invention relates to a cooking device. Background Art

[0002] With the improvement of people's living standards, cooking equipment represented by microwave ovens, steam ovens or microwave ovens have gradually entered thousands of households.

[0003] In the prior art, the door assembly of the cooking device is made of cold-rolled sheet metal or galvanized sheet metal spray coating, and a sealing ring is used to seal the door body to prevent steam leakage.

[0004] However, for existing sealing rings, such as patents CN105674356A and CN208475395U, condensed water on the door body or door glass tends to collect in the groove of the sealing ring, so that a certain amount of water tends to gather at the sealing ring. Correspondingly, the door body coating is also immersed in these condensed water for a long time. As the coating is used in the cooking equipment (in a heating environment), the coating will gradually fall off or crack, causing the door body to rust, affecting the user experience and affecting the normal use of the equipment. In severe cases, the door body will crack due to rust and cannot shield microwaves, causing harm to the human body. Summary of the invention

[0005] In view of this, the present invention aims to propose a cooking device to solve the problem in the prior art that some condensed water tends to gather and accumulate at the sealing ring, causing the door coating to fall off and the door to rust.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A cooking device includes a door assembly, wherein the door assembly includes a door body, a baffle, and a sealing ring, wherein the sealing ring is connected to the baffle and can form a seal between the door body and the baffle, a drainage hole is arranged at the lower section of the ring body of the sealing ring, the baffle is arranged with a drainage groove corresponding to the drainage hole, and the drainage groove is arranged below the drainage hole.

[0008] Furthermore, the cooking device includes a cavity front plate, the sealing ring includes a main body arm, and a cavity sealing arm is arranged on one side of the main body arm close to the cavity front plate to provide a sealing effect between the door assembly and the cavity front plate.

[0009] Furthermore, a water trough cavity is formed between the main body arm and the cavity sealing arm, and a drainage hole is arranged at the bottom of the water trough cavity.

[0010] Furthermore, the sealing ring includes a self-sealing arm, which is connected to a side of the cavity sealing arm facing away from the cavity front plate. The side of the main arm facing the cavity front plate is recorded as a self-sealing surface, and the self-sealing arm can abut or separate from the self-sealing surface.

[0011] Furthermore, when the door assembly is in a closed state, the self-sealing arm can abut against the self-sealing surface; when the door assembly is in an open state, the self-sealing arm can be separated from the self-sealing surface.

[0012] Furthermore, the minimum distance between the self-sealing arm and the self-sealing surface when the sealing ring is in a natural state is recorded as F, and the maximum interference between the cavity sealing arm and the cavity front plate when the door assembly is in a closed state is recorded as E. The ratio of E to F is 1.8-2.4.

[0013] Furthermore, the highest point of the self-sealing arm is higher than the highest point of the cavity sealing arm, and the highest point of the self-sealing arm is lower than the highest point of the self-sealing surface; the vertical distance between the highest point of the self-sealing arm and the highest point of the cavity sealing arm is recorded as D, and the vertical distance between the highest point of the self-sealing arm and the highest point of the self-sealing surface is recorded as B, and the ratio of D to B is 5.0-7.0.

[0014] Furthermore, a door body sealing arm and a door body sealing frame are arranged on the side of the main arm close to the door body, and the sealing ring is sealed to the door body through the door body sealing arm and the door body sealing frame; the highest point of the self-sealing arm is lower than the highest point of the door body sealing arm.

[0015] Furthermore, an assembly cavity is provided on one side of the main body arm close to the shield plate, and the shield plate is provided with an assembly rib, and the assembly rib is arranged in the assembly cavity.

[0016] Furthermore, the cooking device includes a water receiving box, which is arranged below the front plate of the cavity, and the drainage hole and the drainage groove are located above the water receiving box.

[0017] Compared with the prior art, the cooking device of the present invention has the following advantages:

[0018] The cooking device described in the present invention has a drainage hole at the bottom of the sealing ring and a corresponding drainage groove on the baffle. When condensed water flows to the sealing ring, the condensed water can be further discharged along the drainage hole and the drainage groove, and will not gather and accumulate at the sealing ring for a long time, and the door coating will not be in contact with the condensed water for a long time, thereby ensuring the normal use environment of the coating and effectively ensuring the service life of the coating, avoiding microwave leakage caused by premature shedding of the coating, premature rusting and cracking of the door, thereby ensuring the overall service life of the cooking device and protecting the user's safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a door assembly according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the shield according to an embodiment of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the sealing ring according to an embodiment of the present invention;

[0023] Figure 4 A simplified structural diagram of a cooking device according to an embodiment of the present invention when the door assembly is closed (specifically, a vertical cross-sectional view at a drainage groove);

[0024] Figure 5 For the embodiment of the present invention Figure 4 A partial enlarged view of the middle A;

[0025] Figure 6 A simplified structural diagram of a cooking device according to an embodiment of the present invention in a state where a door assembly is gradually opened (specifically, a vertical cross-sectional view at a certain drainage groove);

[0026] Figure 7 It is a schematic diagram of the interference state between the sealing ring and the cavity front plate according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Door body; 2. Sealing ring; 20. Main arm; 21. Drain hole; 22. Water trough cavity; 23. Self-sealing surface; 24. Self-sealing arm; 25. Cavity sealing arm; 26. Door body sealing arm; 27. Door body sealing bone position; 28. Assembly cavity; 29. ​​Lower section of ring body; 3. Shield; 31. Drain trough; 4. Glass; 5. Cavity front plate; 6. Water collection box; 7. Assembly ribs; 100. Door assembly. DETAILED DESCRIPTION

[0029] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Directional terms in this application, such as: up, down, bottom, top, front, back, etc., are all based on the attached Figure 4The coordinates in the figure are used as the reference, which is also consistent with people's understanding of cooking equipment in a normal placement state. At the same time, in order to visually distinguish different lines in the drawings, the marks related to the size in this application are red, and the marks related to the flow direction of condensed water are blue. At the same time, the attached Figure 4 , 6 Some structures have been omitted so that the view has a suitable aspect ratio and clarity.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] In order to solve the problem that some condensed water in the prior art tends to gather and accumulate at the sealing ring, causing the door coating to fall off and the door to rust, etc., this embodiment proposes a cooking device, such as the attached Figure 1-7 As shown, the cooking device includes a door assembly 100, and the door assembly 100 includes a door body 1, a baffle 3, and a sealing ring 2. The sealing ring 2 is connected to the baffle 3 and can form a seal between the door body 1 and the baffle 3. A drainage hole 21 is provided at least in the lower section 29 of the ring body of the sealing ring 2, and the baffle 3 is provided with a drainage groove 31 corresponding to the drainage hole 21, and the drainage groove 31 is provided below the drainage hole 21.

[0033] The present application sets a drainage hole 21 at the bottom of the sealing ring 2 and a corresponding drainage groove 31 on the baffle 3. When the condensed water flows to the sealing ring 2, the condensed water can be further discharged along the drainage hole 21 and the drainage groove 31, and will not gather and accumulate at the sealing ring for a long time, and the door coating will not be in contact with the condensed water for a long time, thereby ensuring the normal use environment of the coating, and can effectively ensure the service life of the coating, avoid the microwave leakage caused by premature shedding of the coating, premature rusting and cracking of the door, thereby ensuring the overall service life of the cooking equipment and protecting the user's safety.

[0034] It should be noted that the lower section 29 of the ring body is the bottom section of the sealing ring 2, which is located below the glass 4. As water flows downward, the attached Figure 3-7 The illustrations are mainly for the sealing ring 2 at the lower section 29 of the ring body. The present application can only set the drainage hole 21 at the lower section 29 of the ring body. Of course, the drainage holes 21 can also be further set at other ring bodies of the sealing ring 2. The present application does not impose too many restrictions on it.

[0035] The cooking device includes a cavity front plate 5, and when the door assembly 100 is closed, the sealing ring 2 can seal between the door assembly 100 and the cavity front plate 5. Specifically, the sealing ring 2 includes a main body arm 20, and a cavity sealing arm 25 is arranged on a side of the main body arm 20 close to the cavity front plate 5, so that on the basis of the main body arm 20, the cavity sealing arm 25 further provides a sealing effect between the door assembly 100 and the cavity front plate 5.

[0036] A water trough cavity 22 is formed between the main arm 20 and the cavity sealing arm 25, and a drainage hole 21 is set at the bottom of the water trough cavity 22. Since the cavity sealing arm 25 extends a certain length from front to back, the condensed water flowing downward along the door assembly 100 will enter the water trough cavity 22 and then flow out of the sealing ring 2 from the drainage hole 21, thereby preventing the condensed water flowing down the door assembly 100 from gathering at the sealing ring.

[0037] The sealing ring 2 includes a self-sealing arm 24, which is connected to a side of the cavity sealing arm 25 facing away from the cavity front plate 5. The side of the main arm 20 facing the cavity front plate 5 is recorded as a self-sealing surface 23, and the self-sealing arm 24 can abut or separate from the self-sealing surface 23.

[0038] Specifically, when the door assembly 100 is in a closed state, it is squeezed between the cavity front plate 5 and the cavity sealing arm 25, and the cavity sealing arm 25 is deformed accordingly, and the self-sealing arm 24 can abut against the self-sealing surface 23 to seal the water tank cavity 22. Therefore, by setting the self-sealing arm 24, when the door assembly 100 is closed (for example: the cooking device is in operation), the connection between the water tank cavity 22 and the inner cavity of the cooking device can be cut off, forming a "self-seal" of the sealing ring 2, which can prevent the gas in the inner cavity from leaking out along the water tank cavity 22 and the drain hole 21, and can also prevent the outside air from entering the inner cavity along the drain hole 21 and the water tank cavity 22, which helps to ensure the independence of the food cooking environment in the inner cavity. At this time, the condensed water formed during the operation of the cooking device is concentrated between the cavity front plate 5 and the sealing ring 2.

[0039] Correspondingly, when the door assembly 100 is in the open state, as the extrusion between the cavity front plate 5 and the sealing ring 2 is gradually and completely released, the cavity sealing arm 25 and the self-sealing arm 24 also gradually and naturally open and reset, and the self-sealing arm 24 can be separated from the self-sealing surface 23, so that the water trough cavity 22 is in an open state, ensuring that condensed water can smoothly pass through the water trough cavity 22 and the drainage hole 21.

[0040] The main arm 20 is provided with an assembly cavity 28 on one side close to the shield 3, and the shield 3 is provided with an assembly rib 7, and the assembly rib 7 is arranged in the assembly cavity 28, so that the sealing ring 2 can at least be assembled with the shield 3 by clamping, which is convenient for disassembly and assembly of the sealing ring 2, and also helps to ensure that the sealing ring 2 has good assembly reliability and sealing between the door body 1 and the shield 3. Of course, on this basis of assembly, the sealing ring 2 can also be fixedly connected with the shield 3 by fasteners or pins.

[0041] A door body sealing arm 26 and a door body sealing frame 27 are provided on the side of the main arm 20 close to the door body 1, and the sealing ring 2 is sealed and connected to the door body 1 through the door body sealing arm 26 and the door body sealing frame 27. Therefore, by providing at least two sealing positions on the door body 1, the sealing performance of the sealing ring 2 between the door body 1 and the baffle 3 can be effectively improved, and the installation reliability of the sealing ring 2 between the door body 1 and the baffle 3 can also be improved.

[0042] Based on the corresponding structure of the sealing ring 2, the present application further studies the relevant dimensions of the sealing ring 2.

[0043] As attached Figure 7 As shown, in the front-to-back direction, the minimum distance between the self-sealing arm 24 and the self-sealing surface 23 when the sealing ring 2 is in a natural state (which can be understood as a normal assembly state and without deformation) is recorded as F, and the maximum interference between the cavity sealing arm 25 and the cavity front plate 5 when the door assembly 100 is in a closed state is recorded as E, and the ratio of E to F is 1.8-2.4. Therefore, on the one hand, after the door assembly 100 is closed, on the basis of ensuring good sealing performance between the door assembly 100 and the cavity front plate 5, the tightness of the abutment between the self-sealing arm 24 and the self-sealing surface 23 can also be guaranteed, ensuring that the sealing ring 2 has good self-sealing performance and can completely cut off the communication between the water tank cavity 22 and the inner cavity of the cooking device. On the other hand, during the closing process of the door assembly 100, it is avoided that the self-sealing arm 24 and the self-sealing surface 23 generate excessive deformation resistance during the self-sealing process due to F being too large, so that the user needs to have a greater force to close the door, causing inconvenience to the closing of the door assembly 100.

[0044] As attached Figure 3 As shown, since the sealing ring 2 is often a relatively regular ring structure with a central axis, the central axis is located at the adjacent Figure 4 extends in the front-to-back direction from the perspective of Figure 3In the schematic diagram, the highest points of the various structural parts of the sealing ring 2 can be compared, but for the rigor of the description, it should be noted that the "highest point" of each structural part in this application is not strictly vertical. To be precise, the "highest point" of a structural part refers to the point where the structural part is closest to the central axis of the sealing ring 2. Alternatively, this application only focuses on and introduces the relevant dimensional relationship at the lower section 29 of the ring body.

[0045] The minimum vertical distance between the self-sealing arm 24 and the central axis of the sealing ring 2 is less than the minimum vertical distance between the cavity sealing arm 25 and the central axis of the sealing ring 2 (i.e., Figure 3 In the embodiment, at the lower section 29 of the ring body, the highest point of the self-sealing arm 24 is "higher" than the highest point of the cavity sealing arm 25), the minimum vertical distance between the self-sealing arm 24 and the central axis of the sealing ring 2 is greater than the minimum vertical distance between the self-sealing surface 23 and the central axis of the sealing ring 2 (i.e., the minimum vertical distance between the self-sealing surface 23 and the central axis of the sealing ring 2 is greater than the minimum vertical distance between the self-sealing surface 23 and the central axis of the sealing ring 2 (i.e., the minimum vertical distance between the self-sealing arm 24 and the central axis of the sealing ring 2 is greater than the minimum vertical distance between the self-sealing surface 23 and the central axis of the sealing ring 2). Figure 3 In the figure, at the lower section 29 of the ring body, the highest point of the self-sealing arm 24 is "lower" than the highest point of the self-sealing surface 23); at the same time, the vertical distance between the highest point of the self-sealing arm 24 and the highest point of the cavity sealing arm 25 is recorded as D, and the vertical distance between the highest point of the self-sealing arm 24 and the highest point of the self-sealing surface 23 is recorded as B, and the ratio of D to B is 5.0-7.0. Thus, by optimizing the relevant dimensions of the self-sealing arm 24, the cavity sealing arm 25, and the self-sealing surface 23 in the vertical direction, on the one hand, the self-sealing arm 24 and the self-sealing surface 23 can be separated in time during the opening process of the door assembly 100, so that the condensed water at the sealing ring 2 can enter the water tank cavity 22 in time and conveniently and be discharged. On the other hand, on the basis of the fixed total thickness dimension of the sealing ring 2, as the cavity sealing arm 25 abuts and deforms against the cavity front plate 5, sufficient space is reserved for the abutment and sealing between the self-sealing arm 24 and the self-sealing surface 23, thereby ensuring the reliability of the self-sealing of the sealing ring 2.

[0046] The minimum vertical distance between the self-sealing arm 24 and the central axis of the sealing ring 2> the minimum vertical distance between the door sealing arm 26 and the central axis of the sealing ring 2 (i.e., the minimum vertical distance between the door sealing arm 26 and the central axis of the sealing ring 2 Figure 3 In the lower section 29 of the ring body, the highest point of the self-sealing arm 24 is "lower" than the highest point of the door body sealing arm 26), and the vertical distance between the two is C. Therefore, the sealing point between the door body sealing arm 26 and the door body 1 should be "higher" than the level of the condensed water gathered at the sealing ring 2, so that the condensed water will not flood the sealing point at the door body 1, and the condensed water can be prevented from contacting the door body coating for a long time, so as to ensure the service life of the coating.

[0047] In the normal assembly state of the door assembly 100, the minimum vertical distance between the assembly rib 7 and the central axis of the sealing ring 2 is less than the minimum vertical distance between the drainage outlet of the drainage hole 21 and the central axis of the sealing ring 2 (i.e., the minimum vertical distance between the drainage outlet of the drainage hole 21 and the central axis of the sealing ring 2). Figure 3 In the embodiment, at the lower section 29 of the ring body, the highest point of the assembly rib 7 is "higher" than the drainage outlet surface of the drainage hole 21). Therefore, in the process of condensed water being discharged from the drainage hole 21, since the assembly rib 7 is "higher" than the drainage hole 21, the discharged condensed water will not flow back along the sealing ring 2 to the assembly rib 7, thereby ensuring the tight connection between the sealing ring 2 and the baffle 3, and preventing condensed water from entering.

[0048] The width of the drainage groove 31 is greater than the width of the drainage hole 21 , so that the condensed water discharged from the drainage hole 21 can all enter the drainage groove 31 and be discharged, which is conducive to the smooth discharge of the condensed water.

[0049] Therefore, on the basis of the structure of the traditional door body sealing ring, the present application only needs to add the self-sealing arm 24 and the drain hole 21, and make certain dimensional requirements for the relevant structure, so as to achieve the purpose of "when the door is closed, the self-sealing arm 24 and the self-sealing surface 23 form a sealed cavity space, and water vapor does not leak outward on the cavity side, and condensed water is not discharged from the drain hole 21; when the door is opened, the sealing arms of the sealing ring are opened, and the water trough cavity 22 is opened accordingly, and the condensed water can flow through the water trough cavity 22, the drain hole 21, and the drain groove 31 in sequence for drainage", thereby solving the problem of condensed water gathering and accumulating at the sealing ring, avoiding long-term contact of the door body coating with condensed water, ensuring the normal use environment of the coating, and being able to effectively ensure the service life of the coating, avoiding the problem of microwave leakage caused by premature shedding of the coating, premature rusting and cracking of the door body, thereby ensuring the overall service life of the cooking equipment and protecting the user's safety.

[0050] In addition, the cooking device includes a water receiving box 6, which is arranged below the cavity front plate 5, and the drainage hole 21 and the drainage groove 31 can be located above the water receiving box 6, especially when the door assembly 100 is in a closed state, the drainage hole 21 and the drainage groove 31 are located directly above the water receiving box 6. Figure 6 In the process of the door assembly 100 gradually opening from a fully closed state, the self-sealing arm 24 separates from the self-sealing surface 23, and the condensed water formed on the door assembly 100 can enter the water trough cavity 22 and fall into the water receiving box 6 through the drainage hole 21 and the drainage groove 31. At the same time, the condensed water formed on the cavity front plate 5 will also fall into the water receiving box 6 along the cavity front plate 5, thereby not only realizing the drainage of the condensed water at the sealing ring 2 and the door assembly 100, but also realizing the drainage of the condensed water on the cavity front plate 5.

[0051] The water receiving box 6 may have an external drainage pipeline structure for draining water to the external environment to achieve automatic external drainage of the cooking equipment. The water receiving box 6 may also be configured as a detachable box body, and the user may pour out the water in the water receiving box 6 regularly.

[0052] In the present invention, any cooking device such as a microwave oven and a steam oven may include the relevant technical content provided in this embodiment. In addition, the cooking device also includes conventional components such as glass 4, a housing, and an electronic control component. Since these conventional components can be directly referred to the prior art, they will not be described in detail here.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooking device, characterized in that: The cooking device comprises a door assembly (100), wherein the door assembly (100) comprises a door body (1), a baffle (3), and a sealing ring (2), wherein the sealing ring (2) is connected to the baffle (3) and is capable of forming a seal between the door body (1) and the baffle (3), wherein a drainage hole (21) is arranged at the lower section (29) of the ring body of the sealing ring (2), and the baffle (3) is provided with a drainage groove (31) corresponding to the drainage hole (21), and the drainage groove (31) is arranged below the drainage hole (21).

2. A cooking device according to claim 1, characterized in that: The cooking device comprises a cavity front plate (5), the sealing ring (2) comprises a main body arm (20), and a cavity sealing arm (25) is arranged on a side of the main body arm (20) close to the cavity front plate (5) to provide a sealing effect between the door assembly (100) and the cavity front plate (5).

3. A cooking device according to claim 2, characterized in that: A water trough cavity (22) is formed between the main body arm (20) and the cavity sealing arm (25), and a drainage hole (21) is arranged at the bottom of the water trough cavity (22).

4. A cooking device according to claim 2, characterized in that: The sealing ring (2) includes a self-sealing arm (24), and the self-sealing arm (24) is connected to a side of the cavity sealing arm (25) facing away from the cavity front plate (5). The side of the main body arm (20) facing the cavity front plate (5) is recorded as a self-sealing surface (23), and the self-sealing arm (24) can abut against or separate from the self-sealing surface (23).

5. A cooking device according to claim 4, characterized in that: When the door assembly (100) is in a closed state, the self-sealing arm (24) can abut against the self-sealing surface (23); when the door assembly (100) is in an open state, the self-sealing arm (24) can separate from the self-sealing surface (23).

6. A cooking device according to claim 4, characterized in that: The minimum distance between the self-sealing arm (24) and the self-sealing surface (23) when the sealing ring (2) is in a natural state is recorded as F, and the maximum interference between the cavity sealing arm (25) and the cavity front plate (5) when the door assembly (100) is in a closed state is recorded as E, and the ratio of E to F is 1.8-2.

4.

7. The cooking device according to claim 4, characterized in that: The highest point of the self-sealing arm (24) is higher than the highest point of the cavity sealing arm (25), and the highest point of the self-sealing arm (24) is lower than the highest point of the self-sealing surface (23); the vertical distance between the highest point of the self-sealing arm (24) and the highest point of the cavity sealing arm (25) is recorded as D, and the vertical distance between the highest point of the self-sealing arm (24) and the highest point of the self-sealing surface (23) is recorded as B, and the ratio of D to B is 5.0-7.

0.

8. The cooking device according to claim 4, characterized in that: A door body sealing arm (26) and a door body sealing bone position (27) are arranged on the side of the main body arm (20) close to the door body (1); the sealing ring (2) is sealedly connected to the door body (1) via the door body sealing arm (26) and the door body sealing bone position (27); and the highest point of the self-sealing arm (24) is lower than the highest point of the door body sealing arm (26).

9. The cooking device according to claim 2, characterized in that: A mounting cavity (28) is arranged on one side of the main body arm (20) close to the shielding plate (3), and a mounting rib (7) is arranged on the shielding plate (3), and the mounting rib (7) is arranged in the mounting cavity (28).

10. The cooking device according to claim 1, characterized in that: The cooking device comprises a water receiving box (6), wherein the water receiving box (6) is arranged below the cavity front plate (5), and the drainage hole (21) and the drainage groove (31) are located above the water receiving box (6).

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