WO2024089572A1

WO2024089572A1 - Lid body assembly and liquid heating container

Info

Publication number: WO2024089572A1
Application number: PCT/IB2023/060664
Authority: WO
Inventors: 周枫; 舒再善; 刘华清
Original assignee: 浙江绍兴苏泊尔生活电器有限公司
Priority date: 2022-10-25
Filing date: 2023-10-23
Publication date: 2024-05-02
Also published as: CN218304520U

Abstract

A lid body assembly and a liquid heating container. The lid body assembly comprises: an upper lid (10); a lower lid (20) connected below the upper lid (10); an accommodation cavity (210) enclosed between the upper lid (10) and the lower lid (20), a steam inlet (220) being provided on the cavity bottom wall of the accommodation cavity (210), and a steam outlet (230) being provided on the cavity side wall of the accommodation cavity (210); a pressure relief and air discharge assembly (30) arranged in the accommodation cavity (210), the pressure relief and air discharge assembly (30) comprising an air guide tube (310), a first end of the air guide tube (310) being in communication with the steam inlet (220), and a second end of the air guide tube (310) being in communication with the steam outlet (230); the second end of the air guide tube (310) is higher than the first end of the air guide tube (310) in the height direction of the lid body assembly.

Description

Technical field of cover assembly and liquid heating container The present application relates to the technical field of household appliances, and specifically to a cover assembly and a liquid heating container. Background technology At present, the existing electric kettle is designed with an anti-dumping kettle cover to prevent water from overflowing when the kettle is tipped over. The existing anti-dumping kettle cover generally includes at least two exhaust pipes and at least two steel balls, with many assembled parts, complex structure, and high cost. In addition, the condensed water in the kettle cover cannot flow back directly. If the condensed water in the kettle cover is to be refluxed, a reflux channel needs to be designed, and the structure is complex. SUMMARY OF THE INVENTION The present application aims to solve at least one of the technical problems existing in the above-mentioned prior art or related art. To this end, the first aspect of the present application is to provide a cover assembly. The second aspect of the present application is to provide a liquid heating container. According to a first aspect of the present invention, a cover assembly is provided, the cover assembly comprising: an upper cover; a lower cover connected below the upper cover, the upper cover and the lower cover enclose a receiving chamber, a steam inlet is provided on the bottom wall of the receiving chamber, and a steam outlet is provided on the side wall of the receiving chamber; a pressure relief exhaust assembly is arranged in the receiving chamber, the pressure relief exhaust assembly comprises an air duct, a first end of the air duct is connected to the steam inlet, and a second end of the air duct is connected to the steam outlet; wherein the second end of the air duct is higher than the first end of the air duct along the height direction of the cover assembly. The cover assembly proposed in the embodiment of this aspect includes an upper cover, a lower cover and a pressure relief exhaust assembly, and the pressure relief exhaust assembly includes an air duct, a first end of the air duct is connected to the steam inlet, and a second end of the air duct is connected to the steam outlet, that is, the two ends of the air duct are connected to the steam inlet and the steam outlet respectively, when the liquid heating container is placed normally, the power is turned on for heating, and the steam inlet, the air duct and the steam outlet can play a role in conducting steam to meet the normal exhaust requirements of boiling water. Further, the air duct is coiled in a spiral shape, and when the liquid heating container is tilted, a small amount of water will flow from the steam inlet into the air duct. Under the principle of closed spiral air duct communication, the water in the liquid heating container is connected to the water flowing into the spiral air duct, and the height of the water flowing into the air duct is always the same as the height of the liquid level in the container body, that is, the liquid heating container can be tilted in any direction, and the spiral air duct always has Part of it is higher than the liquid level inside the liquid heating container, so that when the liquid heating container is tipped over, the water will only flow into the spiral air duct, and will not overflow the cover assembly and scald the user. It can be tipped over at will, thereby achieving the purpose of preventing the cover assembly from tipping over. In addition, the spiral air duct has a tortuous pipeline, and its length is longer and smoother than other shapes, which has the advantage of fast heat dissipation. When the steam flows in the spiral air duct, due to the longer pipeline, it has a certain refrigeration effect, the steam can be quickly cooled, and the steam discharge amount can be effectively suppressed. In addition, the cover assembly provided in the above embodiment of the present application may also have the following additional technical features: In some embodiments, the pressure relief exhaust assembly also includes: a first joint and a second joint, the first joint connects the first end of the air duct and the steam inlet, and the second joint connects the second end of the air duct and the steam outlet. In this way, the air duct and the steam inlet are connected by the first joint, and the second joint connects the air duct and the steam outlet, so that the connection between the air duct and the steam inlet and the steam outlet is simple and convenient, which is convenient for assembly operation, and can ensure that the air duct and the steam inlet and the steam outlet are tightly connected. In some embodiments, the first joint and the second joint are an integrated structure. In this way, the first joint and the second joint are integrated, which can reduce one part and improve assembly efficiency and cost. In some embodiments, the first joint and the second joint are split structures. In this way, the first joint and the second joint are designed as a separate part, which can simplify the structure of each joint, simplify the mold, and facilitate the processing and production of parts. In some embodiments, the first joint includes a first straight pipe section and a first connecting section protruding from the side wall of the first straight pipe section, the first connecting section is connected to the first straight pipe section, the first connecting section is connected to the first end of the air guide pipe, and the first end of the first straight pipe section is connected to the steam inlet; the second joint includes a second straight pipe section and a second connecting section protruding from the side wall of the second straight pipe section, the second connecting section is connected to the second straight pipe section, the second connecting section is connected to the second end of the air guide pipe, and the first end of the second straight pipe section is connected to the steam outlet. In these embodiments, the structures of the first joint and the second joint are defined. Specifically, the first joint includes a first straight pipe section and a first connecting section protruding from a side wall of the first straight pipe section, wherein the first connecting section is connected to the first straight pipe section, the first straight pipe section is connected to a steam inlet, the first connecting section is connected to an air duct, steam can enter the first straight pipe section from the steam inlet, and then enter the air duct through the first connecting section; further, the second joint includes a second straight pipe section and a second connecting section protruding from a side wall of the second straight pipe section, the second straight pipe section is connected to a steam outlet, the steam in the air duct further moves toward the second joint, and enters the second straight pipe section through the second connecting section. , and then discharged through the steam outlet. In some embodiments, a first pressure relief valve is provided at the second end of the first straight pipe section, and the first pressure relief valve can be opened when the pressure exceeds the pressure threshold; and/or a second pressure relief valve is provided at the second end of the second straight pipe section, and the second pressure relief valve can be opened when the pressure exceeds the pressure threshold. In these embodiments, the first pressure relief valve and/or the second pressure relief valve are both in a closed state under normal conditions to prevent steam from being discharged from the second end of the first straight pipe section and/or the second straight pipe section. When the pressure inside the liquid heating container exceeds the pressure threshold, the internal steam can break open the first pressure relief valve and/or the second pressure relief valve, so that the steam is quickly discharged from the first pressure relief valve and/or the second pressure relief valve, avoiding the danger caused by the inability to discharge the steam inside the container body and excessive pressure. In some embodiments, the second end of the air duct is higher than the first end of the air duct along the height direction of the cover assembly. In this arrangement, since the second end of the air duct connected to the steam outlet is high and the first end connected to the steam inlet is low, after the steam condenses, the condensed water in the air duct can flow to the steam inlet under the action of gravity and flow back into the container body through the steam inlet, thereby reducing water loss and saving energy. In addition, since the air duct is spiral, the pipeline of the spiral air duct is also smoother and has less resistance, which is conducive to the reflux of condensed water. In some embodiments, a plurality of first support ribs are provided on the upper surface of the cavity bottom wall, and a first matching groove adapted to the air duct is provided on the first support rib; a second support rib extending downward is provided on the bottom wall of the upper cover, and a second matching groove is provided on the second support rib, and the second matching groove and the first matching groove enclose the air duct. In these embodiments, the installation of the air duct is further limited by the first matching groove and the second matching groove, so that the installation of the air duct is stable. Specifically, a plurality of first support ribs are provided on the upper surface of the cavity bottom wall, a second support rib extending downward is provided on the bottom wall of the upper cover, a first matching groove is provided on the first support rib, a second matching groove is provided on the second support rib, and the air guide tube is installed in the space enclosed by the first matching groove and the second matching groove. In some embodiments, the first joint and/or the second joint are plastic parts, silicone parts or metal parts. In these embodiments, the material of the first joint and/or the second joint is widely optional, which can improve production efficiency and reduce production costs. Specifically, the first joint and/or the second joint are plastic parts, which have low cost and can be mass-produced through injection molding process, which is convenient for processing; the first joint and/or the second joint are silicone parts, which have the advantages of being non-toxic, harmless, safe, elastic and long-life, and are suitable for making accessories for food containers. The first joint and/or the second joint are metal parts, metal The accessories have the advantages of high structural strength, safe material, not easy to deform, long life, etc., and stainless steel is preferably used. In some embodiments, the air duct is a plastic part, a silicone part, or a metal part. Such a setting makes the material of the air duct widely available, which can improve production efficiency and reduce production costs. Specifically, the air duct is a plastic part, which has low cost and can be mass-produced through injection molding, which is convenient for processing; the air duct is a silicone part, which has the advantages of being non-toxic, safe, elastic, and long life, and is suitable for the production of accessories for food containers. The air duct is a metal part, which has the advantages of high structural strength, safe material, not easy to deform, and long life, and stainless steel is preferably used. In some embodiments, the cover assembly also includes: a cover plate, which is connected to the bottom of the lower cover, and a plurality of air holes are arranged on the cover plate; a sealing ring, which is sleeved on the outer periphery of the cover plate. In these embodiments, the cover plate and the sealing ring are installed below the lower cover. When the cover assembly is covered with the container body, the cover plate and the sealing ring are located inside the container body and tightly block the container opening to achieve sealing at the container opening. The air vent can be connected to the steam inlet to prevent the cover plate from blocking the steam inlet and ensure that the steam inlet smoothly conducts steam. According to a second aspect of the present invention, a liquid heating container is provided, comprising: a container body, the top of the container body having a container opening; and a cover assembly as in any one of the above technical solutions, the cover assembly cover is arranged at the container opening. The liquid heating container provided in the embodiment of this aspect has the beneficial effects of any of the above technical solutions due to the cover assembly of any of the above technical solutions, which will not be described one by one here. Other aspects and/or advantages of the general concept of the present invention will be partially explained in the following description, and another part will be clear through the description, or can be known through the implementation of the general concept of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and features of the present invention will become more clear through the following description of the embodiments in conjunction with the accompanying drawings, in which: FIG. 1 is a partial structural schematic diagram of a cover assembly provided in accordance with an embodiment of the present invention; FIG. 2 is another partial structural schematic diagram of a cover assembly provided in accordance with an embodiment of the present invention; FIG. 3 is a structural schematic diagram of a lower cover provided in accordance with an embodiment of the present invention; FIG. 4 is a longitudinal sectional schematic diagram of a cover assembly provided in accordance with an embodiment of the present invention; FIG. 5 is an exploded view of a cover assembly provided in accordance with an embodiment of the present invention; and FIG. 6 is a sectional view of a liquid heating container in a dumped state provided in accordance with an embodiment of the present invention. Sketch diagram; Figure 7 is another sectional schematic diagram of a liquid heating container in a dumped state provided according to an embodiment of the present invention. Explanation of the reference numerals in Figures 1 to 7:

10 upper cover, 110 second supporting rib, 111 second matching groove,

20 lower cover, 210 receiving chamber, 220 steam inlet, 230 steam outlet,

30 pressure relief exhaust assembly, 310 air guide pipe, 320 first joint, 321 first straight pipe section, 322 first connecting section, 323 first pressure relief valve, 330 second joint, 331 second straight pipe section, 332 second connecting section, 333 second pressure relief valve,

40 first support bar, 410 first matching groove,

50 cover plate, 510 vent hole,

60 sealing ring, 70 container body. Specific embodiments The following specific embodiments are provided to help readers gain a comprehensive understanding of the methods, devices and/or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and/or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted. The features described herein can be implemented in different forms and should not be interpreted as being limited to the examples described herein. On the contrary, the examples described herein have been provided to show only some of the many possible ways to implement the methods, devices and/or systems described herein, which will be clear after understanding the disclosure of the present application. As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more. Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples, the first member, first component, first region, first layer, or third member described herein may be referred to as a first member, first component, first region, first layer, or third member. The first part may also be referred to as a second member, a second component, a second region, a second layer or a second part. In the specification, when an element such as a layer, a region or a substrate is described as being "on" another element, "connected to" or "bonded to" another element, the element may be directly "on" another element, directly "connected to" or "bonded to" another element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly on" another element, "directly connected to" or "directly bonded to" another element, there may be no other elements in between. The terms used herein are only used to describe various examples and will not be used to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising", "including" and "having" indicate the presence of the described features, quantities, operations, members, elements and/or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, members, elements and/or combinations thereof. The term "plurality" represents any number of two and more than two. The definitions of directional words such as "upper", "lower", "top" and "bottom" in this application are all based on the orientation of the air fryer when it is placed upright in normal use. Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant field and in the present invention, and should not be interpreted in an idealized or overly formal way. In addition, in the description of the examples, when it is considered that a detailed description of the well-known related structure or function will cause an ambiguous interpretation of the present invention, such a detailed description will be omitted. The cover assembly and liquid heating container of some embodiments of the present application will be described below in conjunction with Figures 1 to 7. As shown in FIGS. 1, 2, 3 and 5, an embodiment of the first aspect of the present invention provides a cover assembly, the cover assembly comprising: an upper cover 10; a lower cover 20, connected to the bottom of the upper cover 10, the upper cover 10 and the lower cover 20 enclose a receiving chamber 210, a steam inlet 220 is provided on the bottom wall of the receiving chamber 210, and a steam outlet 230 is provided on the side wall of the receiving chamber 210; a pressure relief exhaust assembly 30, arranged in the receiving chamber 210, the pressure relief exhaust assembly 30 comprises an air duct 310, a first end of the air duct 310 is connected to the steam inlet 220, and a second end of the air duct 310 is connected to the steam outlet 230; wherein, the second end of the air duct 310 is higher than the first end of the air duct 310 along the height direction of the cover assembly. The cover assembly proposed in the embodiment of this aspect comprises an upper cover 10, a lower cover 20 and a pressure relief exhaust assembly 30, the pressure relief exhaust assembly 30 includes an air duct 310, a first end of the air duct 310 is connected to the steam inlet 220, and a second end of the air duct 310 is connected to the steam outlet 230, that is, the two ends of the air duct 310 are connected to the steam inlet 220 and the steam outlet 230 respectively. When the liquid heating container is placed normally, the power is turned on for heating, as shown in FIG. 1, and the arrow in FIG. 1 represents the flow direction of the steam. The steam enters through the steam inlet 220, flows from the air duct 310 to the steam outlet 230, and finally flows out through the steam outlet 230; the steam inlet 220, the air duct 310 and the steam outlet 230 can play a role in conducting steam to meet the normal exhaust requirements of boiling water. Furthermore, the air duct 310 is coiled in a spiral shape, and when the liquid heating container is tipped over, a small amount of water will flow from the steam inlet 220 into the air duct 310, and under the condition of the closed spiral air duct 310 being connected in principle, the water in the liquid heating container is connected with the water flowing into the spiral air duct 310, and the height of the water flowing into the air duct 310 is always the same as the height of the liquid level in the container body 70, that is, the liquid heating container can be tipped in any direction, and a part of the spiral air duct 310 is always higher than the liquid level inside the liquid heating container, so that when the liquid heating container is tipped over, the water will only flow into the spiral air duct 310, and will not overflow the cover assembly and scald the user, and the liquid heating container can be tipped over at will, thereby achieving the purpose of preventing the cover assembly from tipping over. In addition, the spiral air duct 310 is tortuous, longer and smoother than other shapes, and has the advantage of fast heat dissipation. When steam flows in the spiral air duct 310, the longer pipe has a certain cooling effect, the steam can be cooled quickly, and the steam discharge can be effectively suppressed. Further, for the specific structure of the exhaust assembly, in some embodiments, as shown in FIG. 1, FIG. 2 and FIG. 5, the pressure relief exhaust assembly 30 further includes: a first joint 320 and a second joint 330, the first joint 320 connecting the first end of the air duct 310 and the steam inlet 220, and the second joint 330 connecting the second end of the air duct 310 and the steam outlet 230. In this way, the air duct 310 and the steam inlet 220 are connected by the first joint 320, and the second joint 330 connects the air duct 310 and the steam outlet 230, so that the connection between the air duct 310 and the steam inlet 220 and the steam outlet 230 is simple and convenient, which is convenient for assembly operation, and can ensure that the connection between the air duct 310 and the steam inlet 220 and the steam outlet 230 is tight. In some embodiments, the first joint 320 and the second joint 330 are an integrated structure. In this way, the first joint 320 and the second joint 330 are integrated, which can reduce one part and improve assembly efficiency and cost. In other embodiments, as shown in FIG. 1, FIG. 2 and FIG. 5, the first joint 320 and the second joint 330 are split structures. In this way, the first joint 320 and the second joint 330 are designed as a separate part, which can simplify the structure of each joint, simplify the mold, and facilitate the processing of parts. Manufacture. In some embodiments, the first joint 320 and the second joint 330 have the same structure. This arrangement allows the first joint 320 and the second joint 330 to be universal. On the one hand, one joint part can be processed and produced less, reducing the part mold, thereby reducing the processing cost; on the other hand, there is no need to distinguish between the first joint 320 and the second joint 330 during the assembly process of the cover assembly, which facilitates assembly and improves assembly efficiency. Of course, it is understandable that the structures of the first joint 320 and the second joint 330 may not be exactly the same, and they can be adjusted according to the position and shape of the steam inlet 220, the steam outlet 230, and the air guide pipe 310, and they all belong to the protection scope of this solution without departing from the design concept. Further, for the specific joints of the first joint 320 and the second joint 330, in some embodiments, as shown in Figures 2 and 5, the first joint 320 includes a first straight pipe section 321 and a first connecting section 322 protruding from the side wall of the first straight pipe section 321, the first connecting section 322 is connected to the first straight pipe section 321, the first connecting section 322 is connected to the first end of the air duct 310, and the first end of the first straight pipe section 321 is connected to the steam inlet 220; the second joint 330 includes a second straight pipe section 331 and a second connecting section 332 protruding from the side wall of the second straight pipe section 331, the second connecting section 332 is connected to the second straight pipe section 331, the second connecting section 332 is connected to the second end of the air duct 310, and the first end of the second straight pipe section 331 is connected to the steam outlet 230. In these embodiments, the structures of the first joint 320 and the second joint 330 are defined. Specifically, the first joint 320 includes a first straight pipe section 321 and a first connecting section 322 protruding from the side wall of the first straight pipe section 321, wherein the first connecting section 322 is connected to the first straight pipe section 321, the first straight pipe section 321 is connected to the steam inlet 220, and the first connecting section 322 is connected to the air duct 310. Steam can enter the first straight pipe section 321 from the steam inlet 220, and then enter the air duct 310 through the first connecting section 322. Further, the second joint 330 includes a second straight pipe section 331 and a second connecting section 332 protruding from the side wall of the second straight pipe section 331, the second straight pipe section 331 is connected to the steam outlet 230, and the steam in the air duct 310 further moves toward the second joint 330, enters the second straight pipe section 331 through the second connecting section 332, and then is discharged through the steam outlet 230. Further, for the specific joints of the first joint 320 and the second joint 330, in some embodiments, as shown in FIG. 2 and FIG. 5, a first pressure relief valve 323 is provided at the second end of the first straight pipe section 321, and the first pressure relief valve 323 can be opened when the pressure exceeds the pressure threshold; and/or a second pressure relief valve 333 is provided at the second end of the second straight pipe section 331, and the second pressure relief valve 333 can be opened when the pressure exceeds the pressure threshold. Open under the pressure threshold. In these embodiments, the first pressure relief valve 323 and/or the second pressure relief valve 333 are both in a closed state under normal conditions to prevent steam from being discharged from the second end of the first straight pipe section 321 and/or the second straight pipe section 331. When the pressure inside the liquid heating container exceeds the pressure threshold, the internal steam can break open the first pressure relief valve 323 and/or the second pressure relief valve 333, so that the steam is quickly discharged from the first pressure relief valve 323 and/or the second pressure relief valve 333, thereby avoiding the danger caused by the inability to discharge the steam inside the container body 70 and excessive pressure. In practical applications, the first pressure relief valve 323 and the second pressure relief valve 333 can mainly play a role in two situations. First, when the air guide pipe 310 encounters problems such as being blocked and loses its function and cannot be ventilated normally, the air pressure in the liquid heating container is high, and the steam pushes open the first pressure relief valve 323 and/or the second pressure relief valve 333 to prevent boiling water from splashing and scalding hands; second, when the liquid in the liquid heating container boils for a long time, there is too much steam, and the air pressure in the container body 70 is low and in a vacuum state. At this time, the first pressure relief valve 323 and/or the second pressure relief valve 333 automatically opens to balance the pressure inside and outside the container body 70 to prevent the kettle lid from being unable to open. In some embodiments, the first pressure relief valve 323 and/or the second pressure relief valve 333 are elastic pressure relief valves, and the first pressure relief valve 323 and/or the second pressure relief valve 333 include a pressure relief valve plate and a pressure relief valve port, and the pressure relief valve plate has a cross groove, and when the pressure exceeds the pressure threshold, the internal steam can break open the pressure relief valve plate to make the pressure relief valve port open, and when the pressure is lower than the pressure threshold, the pressure relief valve plate can return to a closed state under the action of elastic force to close the pressure relief valve port. In this way, the first pressure relief valve 323 and the second pressure relief valve 333 are used to increase the pressure relief channel for the cover assembly, so that the cover can discharge steam through the steam outlet 230, the first pressure relief valve 323, and the second pressure relief valve 333. Multiple channels, set a backup exhaust plan for abnormal conditions of the cover assembly, and improve the safety of the product. Working principle of the pressure relief valve: Under normal conditions, the cross groove of the first pressure relief valve 323 and/or the second pressure relief valve 333 is closed, which can block the pressure relief valve port, and the steam is normally discharged through the steam outlet 230. When the pressure inside the liquid heating container exceeds the pressure threshold, the internal steam breaks the cross groove, so that the steam is quickly discharged from the first pressure relief valve 323 and/or the second pressure relief valve 333, effectively releasing the pressure in the liquid heating container, and avoiding the risk of explosion caused by excessive pressure in the container body 70; further, after the pressure inside the liquid heating container is restored to balance, the cross groove is closed again to ensure the sealing of the pressure relief valve port. In some embodiments, as shown in Figures 1 and 2, the second end of the air duct 310 is higher than the first end of the air duct 310 along the height direction of the cover assembly. In this way, since the air duct 310 and the steam outlet The second end connected to the steam inlet 230 is high, and the first end connected to the steam inlet 220 is low, as shown in FIG2 . The arrow in FIG2 represents the flow direction of the condensed water. After the steam is condensed, the condensed water in the air guide pipe 310 can flow to the steam inlet 220 under the action of gravity, and flow back into the container body 70 through the steam inlet 220, thereby reducing water loss and saving energy. In addition, since the air guide pipe 310 is spiral, the pipeline of the spiral air guide pipe 310 is also smoother and has less resistance, which is conducive to the reflux of the condensed water. In order to strengthen the installation of the air duct 310, in some embodiments, as shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 5, a plurality of first support ribs 40 are provided on the upper surface of the cavity bottom wall, and a first matching groove 410 matching with the air duct 310 is provided on the first support rib 40; a second support rib 110 extending downward is provided on the bottom wall of the upper cover 10, and a second matching groove 111 is provided on the second support rib 110, and the second matching groove 111 and the first matching groove 410 enclose the air duct 310. In these embodiments, the installation of the air duct 310 is further limited by the first matching groove 410 and the second matching groove 111, so that the installation of the air duct 310 is stable. Specifically, a plurality of first support ribs 40 are provided on the upper surface of the cavity bottom wall, a second support rib 110 extending downward is provided on the bottom wall of the upper cover 10, a first matching groove 410 is provided on the first support rib 40, and a second matching groove 111 is provided on the second support rib 110. The air guide pipe 310 is installed in a space enclosed by the first matching groove 410 and the second matching groove 111. In a specific embodiment, the installation method of the pressure relief exhaust assembly 30 is described in detail below: Optionally, the cover assembly further includes a straight pipe joint (not shown in the figure) connected to the steam inlet 220 and extending upward, and the straight pipe joint can be an integrated joint with the lower cover 20, or can be a separate part. In the case where the straight pipe joint is a separate part, the straight pipe joint is first installed in the steam inlet 220 of the lower cover 20, and then the air guide pipe 310 is inserted into the first matching groove 410 provided on the lower cover 20, and then the two ends of the air guide pipe 310 are correspondingly connected to the first joint 320 and the second joint 330, and the first joint 320 is connected to the straight pipe joint, and then the upper cover 10 is installed to complete the assembly. In some embodiments, the first joint 320 and/or the second joint 330 are plastic parts, silicone parts, or metal parts. In these embodiments, the material of the first joint 320 and/or the second joint 330 is widely optional, which can improve production efficiency and reduce production costs. Specifically, the first joint 320 and/or the second joint 330 are plastic parts, which have low costs and can be mass-produced through injection molding processes, which is convenient for processing; the first joint 320 and/or the second joint 330 are silicone parts, and silicone has the advantages of being non-toxic and harmless, good safety, good elasticity, and long life, and is suitable for the production of accessories for food containers. First joint 320 and/or the second joint 330 are metal parts, and metal parts have the advantages of high structural strength, safe material, not easy to deform, long life, etc., and preferably stainless steel is used. In some embodiments, the air guide tube 310 is a plastic part, a silicone part, or a metal part. Such a configuration makes the material of the air guide tube 310 widely available, which can improve production efficiency and reduce production costs. Specifically, the air guide tube 310 is a plastic part, which has low cost and can be mass-produced through injection molding process, which is convenient for processing; the air guide tube 310 is a silicone part, which has the advantages of being non-toxic and harmless, good safety, good elasticity, and long life, and is suitable for the production of accessories for food containers. The air guide tube 310 is a metal part, and the metal part has the advantages of high structural strength, safe material, not easy to deform, and long life, and preferably stainless steel is used. Optionally, the first pressure relief valve 323 and/or the second pressure relief valve 333 are made of silicone material or rubber material, preferably silicone, which has the advantages of being non-toxic, safe, elastic, and long life, and is suitable for making accessories for food containers. It is understandable that, when the first joint 320 and the second joint 330 are made of plastic material and metal material, both ends of the first straight pipe section 321 and the second straight pipe section 331 can be made into through holes, and the first pressure relief valve 323 and the second pressure relief valve 333 are processed and produced separately, and the first pressure relief valve 323 and the second pressure relief valve 333 are made into structures similar to silicone caps, and the first pressure relief valve 323 is sleeved on the second end of the first straight pipe section 321, and the second pressure relief valve 333 is sleeved on the first end of the second straight pipe section 331. In some embodiments, as shown in FIG. 5 , the cover assembly further includes: a cover plate 50, connected to the lower part of the lower cover 20, and a plurality of vent holes 510 are provided on the cover plate 50; and a sealing ring 60, which is sleeved on the outer periphery of the cover plate 50. In these embodiments, the cover plate 50 and the sealing ring 60 are installed below the lower cover 20. When the cover assembly is covered with the container body 70, the cover plate 50 and the sealing ring 60 are located inside the container body 70 and tightly seal the container opening to achieve sealing at the container opening. The vent holes 510 can be connected to the steam inlet 220 to prevent the cover plate 50 from blocking the steam inlet 220, and ensure that the steam inlet 220 can smoothly conduct steam. In some embodiments, specifically, a plurality of screw holes are provided on the cover plate 50, and the connection between the lower cover 20 and the cover plate 50 is achieved by passing the screws through the screw holes and locking them on the lower cover 20. Further, the lower cover 20 includes a cover bottom wall and a cover side wall arranged around the edge of the cover bottom wall, a flange is arranged at the top of the cover side wall, a groove matching the flange is arranged on the inner periphery of the sealing ring 60, and the flange is clamped in the groove to achieve a tight fit between the sealing ring 60 and the cover plate 50. Further, the cover plate 50 and the lower cover 20 are enclosed in a A cavity is formed, and a plurality of air holes 510 are arranged on the cover plate 50. The steam in the container body 70 enters the cavity through the air holes 510, and then enters the steam inlet 220 arranged on the lower cover 20, and then is discharged through the pressure relief exhaust assembly 30. As shown in Figures 6 and 7, according to the second aspect of the present invention, a liquid heating container is provided, comprising: a container body 70, the top of the container body 70 has a container opening; and a cover assembly as in any one of the above technical solutions, the cover assembly is covered at the container opening. The liquid heating container provided in the embodiment of this aspect has the beneficial effects of any of the above technical solutions due to the cover assembly of any of the above technical solutions, which will not be described one by one here. In actual application, the cover assembly is covered at the container opening. In this state, the sealing ring 60 is compressed and blocked at the container opening to achieve sealing at the container opening. In some embodiments, the liquid heating container further includes a pouring port and a handle that are arranged opposite to each other. Optionally, a condensation channel is arranged in the handle, and the steam outlet 230 is connected to the condensation channel, so that the steam in the cover assembly can flow into the condensation channel of the handle, and condense into water droplets therein, and then be discharged. Of course, it is understandable that the condensation channel can be arranged in the outer shell of the outer periphery of the container body 70, and is connected to the steam outlet 230, which can also play the role of collecting condensed water. The setting position of the condensation channel is not limited here, and the specific circumstances in this aspect are no longer listed one by one, but they all belong to the protection scope of this solution without departing from the present design concept. FIG6 shows a cross-sectional view of the pouring state of the liquid heating container with the pouring spout facing downward. It can be seen from FIG6 that a portion of the air duct 310 is higher than the liquid level in the container body 70, so the liquid cannot flow out of the air duct 310; FIG7 shows a cross-sectional view of the pouring state of the liquid heating container at another angle. It can be seen from FIG7 that a portion of the air duct 310 is also higher than the liquid level in the container body 70, so the liquid cannot flow out of the air duct 310. Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined by the claims.

Claims

1. A cover assembly, characterized in that the cover assembly comprises: an upper cover (10); a lower cover (20) connected below the upper cover (10), wherein the upper cover (10) and the lower cover (20) enclose a receiving cavity (210), a steam inlet (220) being arranged on the cavity bottom wall of the receiving cavity (210), and a steam outlet (220) being arranged on the cavity side wall of the receiving cavity (210)

(230); a pressure relief exhaust assembly (30) disposed in the accommodating chamber (210), the pressure relief exhaust assembly (30) comprising an air guide pipe (310), a first end of the air guide pipe (310) being connected to the steam inlet (220), a second end of the air guide pipe (310) being connected to the steam outlet (230), and the air guide pipe (310) being coiled in a spiral shape.

2. The cover assembly according to claim 1, characterized in that the pressure relief exhaust assembly (30) further comprises: a first joint (320) and a second joint (330), wherein the first joint (320) connects a first end of the air guide pipe (310) and the steam inlet (220), and the second joint (330) connects a second end of the air guide pipe (310) and the steam outlet (230).

3. The cover assembly according to claim 2, characterized in that the first joint (320) and the second joint (330) are an integrated structure; or the first joint (320) and the second joint (330) are a split structure.

4. The cover assembly according to claim 2, characterized in that the first joint (320) comprises a first straight pipe section (321) and a first connecting section (322) protruding from a side wall of the first straight pipe section (321), the first connecting section (322) is communicated with the first straight pipe section (321), the first connecting section (322) is connected to a first end of the air guide pipe (310), and the first end of the first straight pipe section (321) is connected to the steam inlet (220); the second joint (330) comprises a second straight pipe section (331) and a second connecting section (332) protruding from a side wall of the second straight pipe section (331), the second connecting section (332) is communicated with the second straight pipe section (331), the second connecting section (332) is connected to a second end of the air guide pipe (310), and the second straight pipe section (331) is connected to the second end of the air guide pipe (310). The first end is connected to the steam outlet (230).

5. The cover assembly according to claim 4, characterized in that a first pressure relief valve (323) is provided at the second end of the first straight pipe section (321), and the first pressure relief valve (323) can be opened when the pressure exceeds a pressure threshold; and/or a second pressure relief valve (333) is provided at the second end of the second straight pipe section (331), and the second pressure relief valve (333) can be opened when the pressure exceeds a pressure threshold.

6. The cover assembly according to any one of claims 1 to 5, characterized in that the second end of the air guide tube (310) is higher than the first end of the air guide tube (310) along the height direction of the cover assembly.

7. The cover assembly according to any one of claims 1 to 5, characterized in that a plurality of first support ribs (40) are provided on the upper surface of the cavity bottom wall, and a first matching groove (410) matching with the air guide tube (310) is provided on the first support rib (40); a second support rib (110) extending downward is provided on the bottom wall of the upper cover (10), and a second matching groove (111) is provided on the second support rib (110), and the second matching groove (111) and the first matching groove (410) enclose the air guide tube (310).

8. The cover assembly according to any one of claims 2 to 5, characterized in that the first connector (320) and/or the second connector (330) is a plastic part, a silicone part or a metal part; and the air guide tube (310) is a plastic part, a silicone part or a metal part.

9. The cover assembly according to any one of claims 1 to 5, characterized in that the cover assembly further comprises: a cover plate (50) connected below the lower cover (20), the cover plate (50) being provided with a plurality of air holes (510); and a sealing ring (60) sleeved on the outer periphery of the cover plate (50).

10. A liquid heating container, characterized in that it comprises: a container body (70), the top of the container body (70) having a container opening; and a cover assembly as described in any one of claims 1 to 9, the cover assembly being arranged to cover the container opening.