Lid assembly and liquid heating container

Abstract

The cover assembly comprises a lower cover (10) having at least two upwardly protruding anti-flooding columns (110), each having a hollow portion (111) therein, each of the anti-flooding columns (110) having a steam inlet (120) penetrating the lower cover (10), the steam inlet (120) communicating with the hollow portion (111); and a molten metal pouring protection valve (20) provided within the hollow portion (111), with a threaded portion (210) on one of the outer wall of the molten metal pouring protection valve (20) and the inner wall of the hollow portion (111), the other being a smooth column, with a spiral passage formed between the threaded portion (210) and the smooth column.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application relates to the technical field of home appliances, and more particularly to lid assemblies and liquid heating containers. [Background technology]

[0002] Currently, most liquid heating container lids on the market have a sealed structure to ensure water boiling efficiency and heat retention, but to avoid the risk of the pressure inside the pot becoming too high due to the large amount of steam generated when boiling water, pouring-resistant pot lids have been designed with measures to allow steam to escape smoothly, and pouring-resistant pot lids can also prevent water from splashing when pouring water into the liquid heating container. Conventional pouring-resistant pot lids usually have at least two exhaust pipes and at least two steel balls, and have a large number of parts, a complex structure, high part processing costs, and a complex and time-consuming assembly process. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the above-mentioned conventional or related art.

[0004] To this end, a first aspect of the present application provides a lid assembly.

[0005] A second aspect of the present application provides a liquid heating vessel.

[0006] According to a first aspect of the present invention, there is provided a lid assembly for covering a top opening of a container body of a liquid heating container, the lid assembly comprising: a lower lid having at least two upwardly protruding anti-flooding columns, each of which has a hollow portion formed therein, each of which has a steam inlet penetrating the lower lid, the steam inlet communicating with the hollow portion; and a molten metal pouring protection valve, which is provided within the hollow portion, and one of the outer wall of the molten metal pouring protection valve and the inner wall of the hollow portion has a threaded portion, the other being a smooth column, and a spiral passage formed between the threaded portion and the smooth column.

[0007] The lid assembly proposed by this embodiment has an anti-overflow column on the lower lid, and a water pouring prevention valve installed in the hollow portion of the anti-overflow column. One of the outer wall of the water pouring prevention valve and the inner wall of the hollow portion has a threaded portion, and the other is a smooth column. A spiral passage is formed between the threaded portion and the smooth column, which can serve to discharge steam and can also block the impact of the water flow the moment the liquid heating container begins to pour water, thereby effectively preventing water from flowing out of the container body from the water pouring prevention valve. Specifically, when the liquid heating container is in a normal state, the spiral passage can discharge steam from inside the container body; when the liquid heating container is in a pouring state, one of the pouring protection valves enters the water, and the liquid can only pass through the spiral passage slowly or not at all, preventing the liquid from leaking out of the lid assembly; the other pouring protection valve is located above the liquid level, and the steam can be discharged from the spiral passage located above the liquid level to relieve the pressure, thereby avoiding the risk of steam not being able to be discharged from inside the container body and the pressure becoming too high, and meeting the needs of a liquid heating container in a pouring protection state.

[0008] Furthermore, compared with the related art's anti-pouring pot cover generally having a structure with at least two exhaust pipes and at least two steel balls, the technical solution of the present application can realize the anti-pouring function and normal exhaust function of the cover assembly only through the cooperation of the anti-pouring valve and the anti-flooding column, which reduces the number of parts, greatly reduces production costs, and also simplifies the assembly process of the cover assembly, improving production efficiency.

[0009] In addition, the lid assembly provided by the above embodiment of the present application may also have the following additional technical features.

[0010] In some embodiments, the difference between the diameter of the threaded portion and the diameter of the smooth column ranges from -0.5 mm to 0.5 mm. Within this range, the airtightness of the spiral passage formed between the threaded portion and the smooth column can be ensured, and the difference between the diameter of the threaded portion and the smooth column will not be too small or too large, making it difficult to attach the molten metal protection valve to the overflow prevention column, or causing the molten metal protection valve to loosen or fall off after being attached to the overflow prevention column. Specifically, this range includes three engagement situations between the threaded portion and the smooth column: First, if there is a gap between the threaded portion and the smooth column, and one side of the gap is 0.25 mm or less, the gap is small enough that the amount of steam or water leaking through the gap is very small and negligible; most of the steam and water must still flow through the spiral passage, thereby effectively preventing water from spilling from the vessel body at the pouring valve. Also, because the gap is small, the pouring valve will not easily loosen and fall into the anti-spill column. Furthermore, if the gap value between the threaded portion and the smooth column exceeds 0.25 mm, hot water may spray out from the spiral passage below when pouring molten metal from the liquid heating vessel. Second, if the difference in diameter between the threaded portion and the smooth column is 0 mm, the threaded portion and the smooth column fit tightly together, ensuring good steam discharge from the spiral passage and effectively preventing water from spilling from the vessel body at the pouring valve. Thirdly, the threaded portion and the smooth column are tightly fitted together, and as long as the interference on one side is 0.25 mm or less, it will not be difficult to install the pouring protection valve in the overflow prevention column. If the interference on one side exceeds 0.25 mm, the spiral passage will be too narrow, and the high-temperature steam in the liquid heating vessel will not be able to be removed in time, which may pose a safety risk.

[0011] In some embodiments, the outer wall of the pouring protection valve is provided with a threaded portion, and the inner wall of the hollow portion is a smooth column. In this way, the threaded portion is provided on the outer wall of the pouring protection valve, and the inner wall of the hollow portion is a smooth column, which can simplify the structure of the mold and facilitate injection molding of the lower cover.

[0012] In some embodiments, the screw portion has a single start thread that is wound multiple times along the height direction of the valve. This increases the length of the screw portion, making it less likely for the liquid to spill. Specifically, when pouring hot water from the liquid heating container, the liquid in the container body passes slowly through the spiral passage, minimizing spillage.

[0013] In some embodiments, the screw portion has a multi-start screw, and the multi-start screw is arranged in parallel and wound multiple times along the height direction of the pouring protection valve. This increases the ventilation area of ​​the spiral passage formed between the multi-start screw and the inner wall of the hollow portion, thereby increasing the steam discharge speed and avoiding the risk of excessive steam accumulation inside the container body and being unable to be discharged, resulting in excessive pressure.

[0014] In some embodiments, the lid assembly further includes an anti-overflow valve piece, and the pouring protection valve is provided with an emergency steam inlet, an emergency steam outlet, and an emergency passage connecting the emergency steam inlet and the emergency steam outlet, the emergency steam inlet is connected to the steam inlet, the anti-overflow valve piece blocks the emergency steam outlet, and when the pressure inside the container body exceeds a predetermined threshold, the pressure can cause the anti-overflow valve piece to flash open.

[0015] In these embodiments, when the internal pressure of the liquid heating container is normal, the anti-overflow valve piece can prevent steam or liquid from passing directly from the emergency steam inlet to the emergency passage and emergency steam outlet, thereby blocking the emergency steam outlet when the liquid heating container is pouring hot water to prevent liquid from spilling. The emergency steam inlet, emergency passage, emergency steam outlet, and anti-overflow valve piece are provided to prevent excessive gas pressure inside the container body from causing an explosion of hot water and injury if all of the spiral passages are blocked. Specifically, when the pressure inside the liquid heating container exceeds a predetermined threshold, steam inside the container body can enter the emergency steam inlet, emergency passage, and emergency steam outlet to push open the anti-overflow valve piece, allowing the steam to be quickly discharged through the emergency outlet and avoiding the risk of excessive pressure buildup due to steam being unable to be discharged from inside the container body.

[0016] In some embodiments, the top end of the pouring protection valve is provided with a fixing portion, and the overflow protection valve piece is provided with an engaging portion, and the fixing portion and the engaging portion engage with each other to connect the overflow protection valve piece to the top end of the pouring protection valve. In this way, the overflow protection valve piece and the top end of the pouring protection valve are connected via the fixing portion and the engaging portion, and the overflow protection valve piece is attached.

[0017] In some embodiments, the fixing portion is a locking hook, and the engaging portion is a locking hole, and the locking hook can pass through the locking hole and hook onto the upper surface of the anti-overflow valve piece, thereby making the anti-overflow valve piece tightly attached to the upper surface of the hot water protection valve. In this way, the locking hook and the locking hole are easy to assemble and have good bonding strength, so they will not easily loosen. The locking hook and the locking hole are used in cooperation, and in normal use, the locking hook is hooked onto the upper surface of the anti-overflow valve piece, so that the anti-overflow valve piece tightly attaches to the surface of the hot water protection valve to block the emergency steam outlet. In abnormal cases, under the action of gas pressure inside the vessel body, the anti-overflow valve piece is compressed and deformed, opening the emergency steam outlet and allowing gas to be discharged through the emergency steam outlet to relieve pressure. When the pressure inside the vessel body returns to normal, the anti-overflow valve piece returns to its original shape and blocks the emergency steam outlet again, so that it can be used repeatedly.

[0018] In some embodiments, the bottom surface of the molten metal pour protection valve is provided with a protrusion that protrudes downward, and a steam guide port is provided on the side of the protrusion, and the steam guide port communicates with the steam inlet and the emergency steam inlet. In this way, the protrusion is located between the lower cover and the bottom surface of the molten metal pour protection valve and serves to support the molten metal pour protection valve, preventing the bottom surface of the molten metal pour protection valve from directly contacting the lower cover and blocking the emergency steam inlet on the bottom surface of the molten metal pour protection valve. In addition, by providing the steam guide port on the side of the protrusion and communicating the steam inlet and the emergency steam inlet, the structure is simplified and installation is easy.

[0019] In some embodiments, the steam inlet is horizontally offset from the emergency steam inlet. This prevents the impact force of the water inside the container body from acting directly on the emergency steam inlet when the liquid heating container pours hot water, thereby preventing the overflow valve piece from being pushed open by the impact force caused by the water swaying when the liquid heating container begins to pour hot water. This ensures that the overflow valve piece can close the emergency steam outlet when the liquid heating container is pouring hot water, preventing liquid from spilling.

[0020] In some embodiments, the steam inlet is located on a side edge of the bottom wall of the hollow portion away from the center of the lower lid. In this way, the steam inlet is positioned as close as possible to the outer peripheral edge of the lower lid on the bottom wall of the hollow portion, so that when the liquid heating container is in a pouring state, the upper pouring safety valve can be maintained at a relatively high position, minimizing the risk of submersion as much as possible, maintaining a passage, ensuring that steam can flow out of the spiral passage, and avoiding the risk of excessive pressure buildup due to steam being unable to be discharged from the inside of the container body, thereby further meeting the needs of the liquid heating container in a pouring state.

[0021] In some embodiments, the lid assembly further includes an intermediate lid connected above the lower lid, a steam guide passage is formed between the lower surface of the intermediate lid and the lower lid, a steam outlet communicating with the outside is provided in the side wall of the lower lid and / or the intermediate lid, and the steam guide passage communicates with the spiral passage and the steam outlet.

[0022] In these embodiments, the pouring protection valve is provided so as to form a steam guide passage together with the lower lid and intermediate lid, and a steam outlet is provided on the intermediate lid and / or lower lid, so that steam discharged from the spiral passage of the pouring protection valve can flow directly into the steam outlet via the steam guide passage, allowing the steam to quickly reach the steam outlet and be discharged from the lid assembly through the steam outlet, shortening the time from boiling to when the power switch is turned off and, at the same time, reducing the contact surface on which the steam condenses and reducing the generation of condensation inside the lid assembly.

[0023] According to a second aspect of the present invention, there is provided a liquid heating container comprising a container body having an opening at the top, and a lid assembly according to any one of the above technical solutions, which is placed over the opening.

[0024] The liquid heating container provided by the embodiment of this aspect has the lid assembly of any one of the above technical solutions, and thereby has the beneficial effects of any one of the above technical solutions, but these will not be described in detail here.

[0025] In some embodiments, the liquid heating container further comprises an inlet and a handle arranged opposite each other, a steam switch is provided inside the handle, the number of the pouring prevention valves is two, and the two pouring prevention valves are arranged symmetrically along the connecting line between the pouring opening and the handle.

[0026] In these embodiments, the handle serves as a fulcrum for operation when pouring water from the liquid heating container, and two pouring prevention valves are symmetrically arranged on the connecting line between the pouring spout and the handle. This prevents one of the pouring prevention valves from being submerged in water regardless of which side the liquid heating container is poured into. As a result, the upper pouring prevention valve maintains a passageway, ensuring that steam can flow out of the spiral passage. This avoids the risk of steam being unable to escape from the inside of the container body and causing excessive pressure buildup, thereby meeting the need for a liquid heating container in a pouring prevention state. Furthermore, the handle is provided with a steam switch. Specifically, the container body is provided with a container steam outlet, which is connected to the steam outlet and further to the inside of the handle. This allows steam within the lid assembly to flow into the handle via the steam outlet and the container steam outlet, where it condenses within the handle or is discharged to the outside. Furthermore, the steam can trigger the steam switch under certain conditions, preventing abnormal operation of the liquid heating container, preventing the risk of boiling dry, and improving product safety.

[0027] Other aspects and / or advantages of the inventive concept will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the inventive concept. [Brief explanation of the drawings]

[0028] The above and other objects and features of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings. [Figure 1] FIG. 2 is an exploded view of a lid assembly provided in accordance with an embodiment of the present invention. [Figure 2] 1 is a schematic diagram of a cross-sectional structure of a lid assembly provided by an embodiment of the present invention; [Figure 3] 1 is a schematic diagram of a cross-sectional structure in which the pouring prevention valve of the cover assembly provided by an embodiment of the present invention can be shown, in which the anti-overflow valve piece is in a closed state; [Figure 4] 1 is a schematic diagram of a cross-sectional structure in which the pouring prevention valve of the cover assembly provided by an embodiment of the present invention can be shown, in which the anti-overflow valve piece is in an open state; [Figure 5] 1 is a schematic diagram of another cross-sectional structure in which the pouring prevention valve of the lid assembly provided by an embodiment of the present invention can be shown, in which the anti-overflow valve piece is in a closed state. [Figure 6] 1 is a schematic diagram of another cross-sectional structure in which the pouring prevention valve of the lid assembly provided by an embodiment of the present invention can be shown, in which the anti-overflow valve piece is in an open state. [Figure 7] 1 is a schematic plan view of a partial structure of a lid assembly provided by an embodiment of the present invention; [Figure 8] 1 is a structural schematic diagram of an inverted state of a lid assembly provided by an embodiment of the present invention; [Figure 9] FIG. 10 is another schematic plan view of a partial structure of a lid assembly provided by an embodiment of the present invention. [Figure 10] 1 is a structural schematic diagram of a pouring prevention valve of a cover assembly provided by an embodiment of the present invention; FIG. [Figure 11]1 is a schematic diagram of the structure of the inverted state of the pouring prevention valve of the cover assembly provided by an embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0029] The symbols in FIGS. 1 to 11 will be explained below.

[0030] 10 lower cover, 110 flood prevention column, 111 hollow section, 120 steam inlet, 20 hot water injection prevention valve, 210 threaded portion, 220 emergency steam inlet, 230 emergency passage, 240 emergency steam outlet, 250 protrusion, 260 steam guide port, 270 locking hook, 30 Overflow valve piece, 310 locking hole, 40 intermediate lid, 410 steam outlet, 50 upper lid, 60 container body, 610 opening, 620 pouring port, 630 container steam outlet.

[0031] The following specific embodiments are provided to aid the reader in a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will become apparent upon understanding the present disclosure. For example, the order of operations described herein is merely exemplary and is not limited to the order described herein, but rather, except for operations that must be performed in a specific order, may be changed as is clear upon understanding the present disclosure. Also, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0032] The features described herein may be embodied in a variety of forms and should not be construed as limited to the examples set forth herein. Rather, the examples set forth herein are provided to illustrate only some of the many possible ways of implementing the methods, devices, and / or systems described herein, many of which will become apparent upon reading the present disclosure.

[0033] For example, as used herein, the term "and / or" includes any one of the associated listed items, and any combination of any two or more of the associated listed items.

[0034] Terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or portions, but these components, assemblies, regions, layers, or portions should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or portion from another component, assembly, region, layer, or portion. Thus, what is referred to in the examples described herein as a first component, first assembly, first region, first layer, or first portion could also be referred to as a second component, second assembly, second region, second layer, or second portion without departing from the teachings of the examples.

[0035] As used herein, when an element, such as a layer, region, or substrate, is described as being "on," "connected," or "coupled" to another element, the element may be directly on, directly "connected," or "coupled" to the other element, or there may be one or more intervening elements. Rather, when an element is described as being "directly on," "directly connected," or "directly coupled" to another element, there may not be any intervening elements.

[0036] The terms used herein are intended only to describe various examples and are not used to limit the disclosure. The singular forms "a," "an," "an," and "having" are intended to include the plural forms unless the context clearly indicates otherwise. The terms "comprise," "comprise," and "have" indicate the presence of stated properties, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other properties, quantities, operations, components, elements, and / or combinations thereof. The term "plurality" refers to any quantity of two and more than two.

[0037] The definitions of directional terms such as "upper," "lower," "top," and "bottom" in this application are all based on the orientation of the air fryer when it is held upright in normal use.

[0038] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains upon understanding the present invention. Unless explicitly defined in this specification, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with the meaning in the relevant field and in the context of the present invention, and should not be interpreted in an ideal or overly formal manner.

[0039] Furthermore, in the description of the examples, if detailed descriptions of known related structures or functions are considered to obscure the interpretation of the present invention, such detailed descriptions will be omitted.

[0040] The lid assembly and the liquid heating container according to some embodiments of the present application will be described below in conjunction with FIGS. 1 to 11. FIG.

[0041] As shown in Figures 1 to 8, an embodiment of the first aspect of the present invention provides a lid assembly for covering a top opening 610 of a container body 60 of a liquid heating container, and the lid assembly includes a lower lid 10 having at least two upwardly protruding anti-flooding columns 110, each of which has a hollow portion 111 formed therein, and each of which has a steam inlet 120 penetrating through the lower lid 10, the steam inlet 120 communicating with the hollow portion 111; and a molten metal pouring protection valve 20, which is formed within the hollow portion 111, and which has a threaded portion 210 on one of the outer wall of the molten metal pouring protection valve 20 and the inner wall of the hollow portion 111, and the other being a smooth column, and which has a spiral passage formed between the threaded portion 210 and the smooth column.

[0042] The cover assembly proposed by this embodiment has an anti-flooding column 110 on the lower cover 10, and a hot water pouring protection valve 20 installed in the hollow section 111 of the anti-flooding column 110. A threaded section 210 is provided on one of the outer wall of the hot water pouring protection valve 20 and the inner wall of the hollow section 111, and the other is a smooth column. A spiral passage is formed between the threaded section 210 and the smooth column, which can serve to discharge steam and can also block the impact of the water flow at the moment the liquid heating container begins to pour hot water, thereby effectively preventing water from flowing out of the container body 60 from the hot water pouring protection valve 20. Specifically, when the liquid heating container is in a normal state, the spiral passage can discharge steam from inside the container body 60; when the liquid heating container is in a pouring state, one of the pouring protection valves 20 enters the water, and the liquid can only pass through the spiral passage slowly or not at all, preventing the liquid from leaking out of the lid assembly; the other pouring protection valve 20 is positioned above the liquid level, and the steam can be discharged from the spiral passage positioned above the liquid level to relieve the pressure, thereby avoiding the risk of steam not being able to be discharged from inside the container body 60 and the pressure becoming too high, and meeting the needs of a liquid heating container in a pouring protection state.

[0043] Furthermore, compared with the fact that the pouring prevention pot cover in the related art generally has a structure with at least two exhaust pipes and at least two steel balls, the technical solution of the present application can realize the pouring prevention function and normal exhaust function of the cover assembly only through the cooperation of the pouring prevention valve 20 and the overflow prevention column 110, which reduces the number of parts, greatly reduces production costs, and also simplifies the assembly process of the cover assembly, improving production efficiency.

[0044] In some embodiments, the difference between the diameter of the threaded portion 210 and the diameter of the smooth column ranges from -0.5 mm to 0.5 mm. Within this range, not only can the airtightness of the spiral passage formed between the threaded portion 210 and the smooth column be ensured, but also the difference between the diameter of the threaded portion 210 and the diameter of the smooth column will not be too small or too large, making it difficult to attach the molten metal protection valve 20 to the floodproof column 110 or causing the molten metal protection valve 20 to loosen or fall off after being attached to the floodproof column 110. Specifically, this range includes three engagement situations of the threaded portion 210 and the smooth column. First, if there is a gap between the threaded portion 210 and the smooth column, and one side dimension of the gap is 0.25 mm or less, the gap dimension is small, so the amount of steam or water leaking out from the gap is very small and can be ignored, and most of the steam and water still have to flow out through the spiral passage, which can effectively prevent water from spilling out of the container body 60 from the molten metal pouring prevention valve 20. Also, because the gap is small, the molten metal pouring prevention valve 20 will not easily loosen and fall into the anti-overflow column 110. Furthermore, if the gap value between the threaded portion 210 and the smooth column exceeds 0.25 mm, hot water may spray out from the spiral passage below when molten metal is poured from the liquid heating container. Second, the difference in diameter between the threaded portion 210 and the smooth column is 0 mm, in which case the threaded portion 210 and the smooth column fit tightly together, ensuring good steam discharge function of the spiral passage and effective prevention of water spillage from the container body 60 at the pouring protection valve 20. Third, there is an interference fit between the threaded portion 210 and the smooth column, and as long as the interference on one side is 0.25 mm or less, it will not be difficult to install the pouring protection valve 20 on the spill prevention column 111. However, if the interference on one side exceeds 0.25 mm, the spiral passage will be too narrow, preventing the high-temperature steam from being discharged in time from the liquid heating container, which may pose a safety risk.

[0045] 1 to 7, 10 and 11, the outer wall of the pouring protection valve 20 is provided with a threaded portion 210, and the inner wall of the hollow portion 111 is a smooth column. By doing so, the threaded portion 210 is provided on the outer wall of the pouring protection valve 20, and the inner wall of the hollow portion 111 is a smooth column, which simplifies the structure of the mold and makes it easier to injection mold the bottom cover 10.

[0046] Regarding the specific structure of the threaded portion 210, in some embodiments, as shown in Figures 1, 10, and 11, the threaded portion 210 has a single thread that is wound multiple times along the height direction of the pouring protection valve 20. By doing so, the length of the threaded portion 210 is increased, making it less likely for the liquid to spill; specifically, when pouring hot water from the liquid heating container, the liquid in the container body 60 passes slowly through the spiral passage, minimizing spillage of the liquid.

[0047] Regarding the specific structure of the threaded portion 210, in some embodiments, the threaded portion 210 has a multi-start thread (not shown), which is arranged in parallel and wound multiple times along the height direction of the pouring protection valve 20. In this way, the ventilation area of ​​the spiral passage formed between the multi-start thread and the inner wall of the hollow portion 111 is increased, and the steam discharge speed is increased, thereby avoiding the risk of excessive steam accumulating inside the container body 60 and being unable to be discharged, resulting in excessive pressure.

[0048] In some embodiments, as shown in Figures 1, 3, 4, 5, 6 and 9, the cover assembly further includes an anti-overflow valve piece 30, and the pouring protection valve 20 is provided with an emergency steam inlet 220, an emergency steam outlet 240, and an emergency passage 230 connecting the emergency steam inlet 220 and the emergency steam outlet 240, the emergency steam inlet 220 is connected to the steam inlet 120, the anti-overflow valve piece 30 blocks the emergency steam outlet 240, and when the pressure inside the container body 60 exceeds a predetermined threshold, the pressure can cause the anti-overflow valve piece 30 to flash open.

[0049] In these embodiments, when the pressure inside the liquid heating container is normal, the anti-overflow valve piece can prevent steam or liquid from passing directly from the emergency steam inlet 220 to the emergency passage 230 and emergency steam outlet 240, so that when the liquid heating container is in a pouring state, the emergency steam outlet 240 can be blocked to prevent liquid from spilling.The reason for providing the emergency steam inlet 220, emergency passage 230, emergency steam outlet 240, and anti-overflow valve piece 30 is to prevent excessive gas pressure inside the container body 60 from causing hot water to spray out and injure people when all of the spiral passages are blocked. Specifically, when the pressure inside the liquid heating container exceeds a predetermined threshold, the steam inside the container body 60 can enter the emergency steam inlet 220, the emergency passage 230, and the emergency steam outlet 240 to push open the anti-overflow valve piece 30, thereby quickly discharging the steam from the emergency outlet and avoiding the risk of the steam not being able to be discharged from inside the container body 60 and the pressure becoming too high.

[0050] In some embodiments, for example, optionally, as shown in Figures 10 and 11, the emergency steam inlet 220 is located at the bottom end of the hot water pouring prevention valve 20, and the emergency steam outlet 240 is located at the top end of the hot water pouring prevention valve 20, and the emergency steam inlet 220 and the emergency steam outlet 240 are provided at both the upper and lower ends of the hot water pouring prevention valve 20, which not only makes installation convenient but also makes the emergency passage 230 straight and contributes to smooth exhaust of the emergency passage 230.

[0051] 5, 10 and 11, in some embodiments, the top end of the pouring protection valve 20 is provided with a fixing portion, and the anti-overflow valve piece 30 is provided with an engaging portion, and the fixing portion and the engaging portion engage with each other to connect the anti-overflow valve piece 30 to the top end of the pouring protection valve 20. In this way, the top ends of the anti-overflow valve piece 30 and the pouring protection valve 20 are connected via the fixing portion and the engaging portion, and the anti-overflow valve piece 30 is attached. Optionally, and by way of example, the fixing portion and the engaging portion can be a combination of a screw hole and a screw, or a combination of an engaging hook and an engaging groove, or a combination of a locking hook 270 and a locking hole 310, all of which can play a role in connection.

[0052] In some embodiments, as shown in Figures 5, 10 and 11, the fixed portion is a locking hook 270, the engaging portion is a locking hole 310, and the locking hook 270 can pass through the locking hole 310 and hook onto the upper surface of the anti-overflow valve piece 30, thereby making the anti-overflow valve piece 30 tightly contact the upper surface of the pouring protection valve 20. By doing this, the locking hook 270 and the locking hole 310 are easy to assemble and have good bonding force, so they will not easily loosen. The locking hook 270 and the locking hole 310 can be used in cooperation. In normal use, the locking hook 270 is hooked onto the upper surface of the anti-overflow valve piece 30, so that the anti-overflow valve piece 30 adheres to the surface of the hot water supply control valve 20 and blocks the emergency steam outlet 240. In abnormal cases, under the action of gas pressure inside the container body 60, the anti-overflow valve piece is compressed and deformed, opening the emergency steam outlet 240 and allowing gas to be discharged from the emergency steam outlet 240 to relieve the pressure. When the pressure inside the container body 60 returns to normal, the anti-overflow valve piece 30 returns to its original shape and blocks the emergency steam outlet 240 again, so it can be used repeatedly.

[0053] In actual operation, the pressure relief valve piece can optionally be a thin plastic piece, which has the advantages of low cost and easy processing and manufacturing. In addition, the thin plastic piece has good elasticity and can return to its original state after being bent. Therefore, after being pushed open by steam, it can return to its original state in a timely manner and close the emergency steam outlet 240 again, which is highly reliable and has a long service life.

[0054] 3, 4, 10, and 11, a protrusion 250 protruding downward is provided on the bottom surface of the molten metal protection valve 20, and a steam guide port 260 is provided on the side of the protrusion 250, and the steam guide port 260 communicates with the steam inlet 120 and the emergency steam inlet 220. In this manner, the protrusion 250 is located between the bottom cover 10 and the bottom surface of the molten metal protection valve 20 and serves to support the molten metal protection valve 20, preventing the bottom surface of the molten metal protection valve 20 from coming into direct contact with the bottom cover 10 and blocking the emergency steam inlet 220 on the bottom surface of the molten metal protection valve 20. Furthermore, providing the steam guide port 260 on the side of the protrusion 250 and communicating the steam inlet 120 and the emergency steam inlet 220 simplifies the structure and makes installation easier.

[0055] In actual operation, the number of protrusions 250 can be optionally multiple, and the multiple protrusions 250 can stably support the bottom surface of the molten metal protection valve 20. Furthermore, there is a gap between two adjacent protrusions 250, and the gap serves as a steam guide port 260 to connect the steam inlet 120 and the emergency steam inlet 220.

[0056] In some embodiments, as shown in Figures 3 and 4, the steam inlet 120 is positioned horizontally offset from the emergency steam inlet 220. By doing so, when pouring hot water from the liquid heating container, the impact force of the water inside the container body 60 does not act directly on the emergency steam inlet 220 via the steam inlet 120, and this prevents the impact force generated by the swaying of the water at the moment the liquid heating container begins to pour hot water from acting on the overflow valve piece 30 and pushing the overflow valve piece 30 open. This ensures that the overflow valve piece 30 can block the emergency steam outlet 240 when the liquid heating container is in the pouring state, preventing liquid from spilling.

[0057] 7, the steam inlet 120 is located on a side edge of the bottom wall of the hollow portion 111, away from the center of the lower cover 10. In this manner, the steam inlet 120 is positioned as close as possible to the outer peripheral edge of the lower cover 10 on the bottom wall of the hollow portion 111, so that when the liquid heating container is in a pouring state, the upper pouring prevention valve 20 can be maintained in a relatively high position, minimizing the risk of submersion as much as possible, maintaining a passage, and ensuring that steam can flow out of the spiral passage, avoiding the risk of steam being unable to be discharged from the inside of the container body 60 and causing excessive pressure buildup, thereby further meeting the needs of the liquid heating container in a pouring state.

[0058] In some embodiments, as shown in Figures 1, 2, 3, 4, 5 and 6, the lid body assembly further includes an intermediate lid 40 connected above the lower lid 10, a steam guide passage is formed between the lower surface of the intermediate lid 40 and the lower lid 10, a steam outlet 410 communicating with the outside is provided in the side wall of the lower lid 10 and / or the intermediate lid 40, and the steam guide passage communicates with the spiral passage and the steam outlet 410.

[0059] In these embodiments, the pouring protection valve 20 is provided so as to form a steam guide passage together with the lower cover 10 and the intermediate cover 40, and a steam outlet 410 is provided in the intermediate cover 40 and / or the lower cover 10, so that the steam discharged from the spiral passage of the pouring protection valve 20 can flow directly into the steam outlet 410 via the steam guide passage, allowing the steam to quickly reach the steam outlet 410 and be discharged from the cover assembly through the steam outlet 410, thereby shortening the time from boiling to when the power switch is turned off, and at the same time reducing the contact surface on which the steam condenses and reducing the occurrence of condensation inside the cover assembly.

[0060] Furthermore, in some embodiments, as shown in Figures 1 to 6, the lid assembly further includes an upper lid 50 attached above the intermediate lid 40, which can cover components located on the intermediate lid 40 and contribute to the cleanliness and aesthetics of the lid assembly.

[0061] Furthermore, in some embodiments, as shown in FIGS. 1 to 6, the lid assembly further includes a sealing ring, which is fitted around the outer periphery of the lower lid 10 to prevent water from leaking between the lid assembly and the container body 60, thereby realizing a sealed connection between the lid assembly and the container body 60.

[0062] According to a second aspect of the present invention, there is provided a liquid heating container comprising a container body 60 having an opening 610 at the top, and a lid assembly described in any one of the above technical solutions, which is installed over the opening 610.

[0063] The liquid heating container provided by the embodiment of this aspect has the lid assembly of any one of the above technical solutions, and thereby has the beneficial effects of any one of the above technical solutions, but these will not be described in detail here.

[0064] In some embodiments, as shown in Figures 1, 2, 5 and 6, the liquid heating container further includes an oppositely disposed pouring spout 620 and a handle, a steam switch is provided inside the handle, the number of pouring prevention valves 20 is two, and the two pouring prevention valves 20 are arranged symmetrically along the connecting line between the pouring spout 620 and the handle.

[0065] In these embodiments, the handle is used as a fulcrum when pouring water from the liquid heating container, so two pouring prevention valves 20 are arranged symmetrically on the connecting line between the pouring spout 620 and the handle. This ensures that one of the pouring prevention valves 20 will not be submerged in the water surface regardless of which side the liquid heating container is pouring water from. As a result, the upper pouring prevention valve 20 maintains the passage and ensures that steam can flow out of the spiral passage, avoiding the risk of steam not being able to escape from inside the container body 60 and the pressure becoming too high, and meeting the needs of a liquid heating container in a pouring prevention state. Furthermore, the handle is provided with a steam switch. Specifically, the container body 60 is provided with a container steam outlet 630, which is connected to the steam outlet 410 and further to the inside of the handle. This allows steam within the lid assembly to flow into the handle via the steam outlet 410 and the container steam outlet 630, where it condenses within the handle or is discharged to the outside. Furthermore, the steam can trigger the steam switch under certain conditions, which prevents abnormal operation of the liquid heating container, prevents the risk of empty-fired operation, and improves product safety.

[0066] Although the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. Those skilled in the art should understand that these modifications and variations still fall within the spirit and scope of the embodiments of the present invention, which are defined by the claims.

Claims

1. a lower cover (10) having at least two upwardly protruding flood prevention columns (110), each of which has a hollow portion (111) therein, each of which has a steam inlet (120) penetrating through the lower cover (10), the steam inlet (120) communicating with the hollow portion (111); a pouring prevention valve (20) provided in the hollow portion (111), in which a threaded portion (210) is provided on one of an outer wall of the pouring prevention valve (20) and an inner wall of the hollow portion (111), and the other is a smooth column, and a spiral passage is formed between the threaded portion (210) and the smooth column; A lid assembly comprising:

2. The closure assembly of claim 1, wherein the difference between the diameter of the threaded portion (210) and the diameter of the smooth column ranges from -0.5 mm to 0.5 mm.

3. 3. The lid assembly according to claim 1, wherein the outer wall of the pouring prevention valve (20) is provided with the threaded portion (210), and the inner wall of the hollow portion (111) is the smooth column.

4. The screw portion (210) has a single-start thread, and the single-start thread is wound multiple times along the height direction of the pouring protection valve (20); or The lid assembly according to any one of claims 1 to 3, wherein the threaded portion (210) has a multi-start thread, and the multi-start thread is arranged in parallel and wound multiple times along the height direction of the pouring prevention valve (20).

5. The valve (20) further includes an overflow prevention valve piece (30), and the valve (20) is provided with an emergency steam inlet (220), an emergency steam outlet (240), and an emergency passage (230) communicating between the emergency steam inlet (220) and the emergency steam outlet (240), the emergency steam inlet (220) is communicated with the steam inlet (120), and the overflow prevention valve piece (30) closes the emergency steam outlet (240), 4. The lid assembly according to claim 1, wherein when the pressure inside the container body (60) exceeds a predetermined threshold, the pressure can cause the anti-overflow valve piece (30) to flash open.

6. 6. The lid assembly according to claim 5, wherein a fixing portion is provided at the top end of the pouring prevention valve (20), and an engaging portion is provided at the anti-overflow valve piece (30), and the fixing portion and the engaging portion engage with each other to connect the anti-overflow valve piece (30) to the top end of the pouring prevention valve (20).

7. The lid assembly of claim 6, wherein the fixing portion is a locking hook (270), the engaging portion is a locking hole (310), and the locking hook (270) can pass through the locking hole (310) and hook onto the upper surface of the anti-overflow valve piece (30), thereby allowing the anti-overflow valve piece (30) to be tightly attached to the surface of the pouring protection valve (20).

8. 8. The lid assembly according to claim 5, wherein a protrusion (250) protruding downward is provided on a bottom surface of the molten metal protection valve (20), and a steam guide port (260) is provided on a side of the protrusion (250), and the steam guide port (260) communicates with the steam inlet (120) and the emergency steam inlet (220).

9. The lid assembly of any one of claims 5 to 8, wherein the steam inlet (120) is horizontally offset from the emergency steam inlet (220).

10. 10. The lid assembly according to claim 9, wherein the steam inlet (120) is located on a side edge of the bottom wall of the hollow portion (111) away from the center of the lower lid (10).

11. 11. The lid assembly according to claim 1, further comprising an intermediate lid (40) connected above the lower lid (10), wherein a steam guide passage is formed between the lower surface of the intermediate lid (40) and the lower lid (10), and a steam outlet (410) communicating with the outside is provided in a side wall of the lower lid (10) and / or the intermediate lid (40), and the steam guide passage communicates with the spiral passage and the steam outlet (410).

12. a container body (60) having an opening (610) at the top; A liquid heating vessel comprising: a lid assembly according to any one of claims 1 to 11, the lid assembly being fitted over the opening (610).

13. The liquid heating container further comprises a pouring spout (620) and a handle provided opposite to each other, the handle having a steam switch therein, and steam within the lid assembly can flow into the handle; 13. The liquid heating container of claim 12, wherein the number of the pouring prevention valves (20) is two, and the two pouring prevention valves (20) are symmetrically arranged along a connecting line between the pouring spout (620) and the handle.

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