A portable liquid heater with enhanced safety protection and a single-source dual-mode design.

Abstract

This invention discloses a single-source dual-mode portable liquid heater with enhanced safety protection, relating to the field of liquid heater technology. It includes a housing with an internal mounting cavity housing a primary power supply circuit, a transformer, a secondary power supply circuit, a high-voltage heating element, a low-voltage heating element, a battery assembly, and a main control module. An mounting port is provided on the outer side of the housing, and a high-voltage power connector is also provided within the mounting cavity, exposed through the mounting port. A steam exhaust channel is provided on the lid, with a breathable protective mesh at the exhaust port. A waterproof and breathable membrane is installed within the channel, forming a cavity between the membrane and the protective mesh. This invention reduces the number of external power connectors and mounting ports through improved circuit layout, enhancing waterproof safety. Furthermore, the isolation effect of the cavity avoids the risk of burns from hot steam splashes, achieving higher safety in use.

Description

Technical Field

[0001] This invention relates to the field of liquid heater technology, specifically to a single-source dual-mode portable liquid heater with higher safety protection, especially a portable water cup type liquid heater. Background Technology

[0002] As disclosed in the announcement number CN223640533U, the power supply and power consumption structure of an electric water cup, this type of portable water cup liquid heater currently encounters two rather troublesome safety issues.

[0003] The first issue concerns waterproofing and safety when powered: For portability, these portable liquid heaters, often reusable in cup-shaped containers, are equipped with a rechargeable battery. Therefore, the product is designed with dual modes: one low-voltage Type-C port for charging the battery, and one high-voltage port for high-power heating. Traditionally, the high-voltage and low-voltage circuits are separate and not interconnected. This results in the product having both a Type-C charging port and a three-prong high-voltage port. Both the Type-C charging port and the three-prong high-voltage port are quite large, taking up considerable internal space and requiring two openings on the casing. This compromises the product's waterproofing, and its waterproofing and safety features need improvement.

[0004] The second issue is the safety of preventing burns from hot steam. During heating, steam is continuously generated inside the cup. Some products have steam venting channels on the lid, with corresponding waterproof and breathable membranes. However, traditional waterproof and breathable membranes are too close to the vent holes above the steam venting channels. Besides being visually unappealing, this also creates bubbles: the steam condenses into water as the membrane changes temperature. If the membrane is directly attached to the vent holes of the steam venting channels, even though the water volume is small, you'll see the product bubbling. When the steam is released during heating, these bubbles can splash, potentially causing burns if the user gets too close.

[0005] Neither of these two security issues has been adequately resolved. Summary of the Invention

[0006] The purpose of this invention is to provide a single-source dual-mode portable liquid heater with higher safety protection, so as to solve at least one of the above-mentioned problems, specifically the problem of waterproof safety when generating electricity or the problem of preventing scalding from hot steam.

[0007] To achieve the above objectives, on the one hand, the present invention provides the following technical solution: a single-source dual-mode portable liquid heater with higher safety protection, including a housing, the interior of which has an installation cavity, and the installation cavity is provided with a primary power supply circuit, a transformer, a secondary power supply circuit, a high-voltage heating element, a low-voltage heating element, a battery assembly and a main control module; An installation port is provided on the outside of the housing, and a high-voltage power supply connector is also provided inside the installation cavity. The high-voltage power supply connector is exposed through the installation port. The high-voltage power supply connector is connected to the input terminal of the primary power supply circuit. After the high-voltage power supply connector is connected to an external high-voltage power source, it transmits high voltage to the primary power supply circuit. The first high-voltage output terminal of the primary power supply circuit is connected to the high-voltage heating element, the second high-voltage output terminal of the primary power supply circuit is connected to the primary winding of the transformer, and the controlled terminal of the primary power supply circuit is connected to the first control terminal of the main control module. The main control module is configured to control the primary power supply circuit to supply power to the high-voltage heating element and / or to the transformer through the first control terminal. The secondary winding of the transformer is connected to the input terminal of the secondary power supply circuit. The primary power supply circuit converts high voltage into low voltage through the transformer to supply the secondary power supply circuit. The power transmission terminal of the secondary power supply circuit is connected to the power connection terminal of the battery pack, the low-voltage output terminal of the secondary power supply circuit is connected to the low-voltage heating element, and the controlled terminal of the secondary power supply circuit is connected to the second control terminal of the main control module. The main control module controls the secondary power supply circuit to supply power to the low-voltage heating element and / or to the battery pack through the second control terminal.

[0008] As a further aspect of the present invention: the high-voltage power supply connector includes a mating end and an insulating seat formed on the mating end; The insulating base has a mating surface for engaging with an external power connector, and an edge area and a mating area enclosed by the edge area are formed on the mating surface, with mating end feet disposed in the mating area; The portion of the housing with the mounting opening has an inner mounting surface facing the inside of the housing and an outer mounting surface facing the outside of the housing; The insulating base is connected to the housing, and the edge area of ​​the mating surface is close to or abuts the inner mounting surface, thus forming a mating area and at least the proximal area of ​​the edge area close to the mating area corresponding to the mounting port. The housing is also provided with an interface seal, which includes a sealing edge portion corresponding to the outer mounting surface and a sealing middle portion enclosed by the sealing edge portion; the sealing middle portion extends inward from the outer mounting surface along the mounting opening to the proximal region near or abutting the engagement area, and the sealing middle portion is provided with an external power engagement clearance opening corresponding to the engagement area. The housing is also provided with a retainer, which is connected to the housing and is configured to press the sealing edge portion against the outer mounting surface and to press the sealing middle portion against the proximal region of the edge area; the retainer has an external power engagement clearance hole corresponding to the engagement area.

[0009] As a further aspect of the invention, the retainer is also configured to press the sealing middle portion against the inner wall of the channel of the mounting port.

[0010] As a further aspect of the present invention: at least one protruding screw post is formed on the outer mounting surface, and a positioning hole that mates with the screw post is provided on the sealing edge. The retainer has a connecting hole that mates with the threaded post, and the threaded post passes through the positioning hole along the axial direction of the threaded post; It is also equipped with a connecting screw that mates with the threaded post. The connecting screw is screwed onto the threaded post and forms a structure that fastens the retainer together with the sealing edge to the outer mounting surface along the axial direction of the threaded post.

[0011] As a further aspect of the present invention: the screw holes are all located on one side of the mounting opening on the outer mounting surface; The housing has a snap-fit ​​portion that extends outward beyond the outer mounting surface. The snap-fit ​​portion is located on the other side of the mounting opening opposite to the screw hole post on the outer mounting surface. A snap-fit ​​groove is provided on the side of the snap-fit ​​portion facing the screw hole post. The retainer has a snap-fit ​​portion formed on it that mates with the snap-fit ​​groove; The thickness of the groove is greater than the thickness of the snap-in part. This configuration allows the retainer to be pressed onto the interface seal by using the snap-in part as a fulcrum and by prying or rotating, after the snap-in part of the retainer is laterally inserted into the snap-in groove, and the connecting hole on the retainer aligns with the screw hole post.

[0012] As a further aspect of the present invention: the interface seal is an elastic seal, and the retainer is a component with a hardness greater than that of the interface seal; The sealing edge does not extend outward beyond the snap-fit ​​groove; The thickness of the sealing edge is such that when the snap-in part is inserted into the snap-in groove, the snap-in part compresses the sealing edge.

[0013] As a further aspect of the present invention: a protective cover is also provided, the protective cover constituting an external power engagement clearance hole for the cover retainer that can be opened; The protective cover is connected to an elastic connector, and the elastic connector is connected to a connecting ring that fits into the screw hole post. The threaded post passes through the positioning hole and the connecting ring sequentially from the inside to the outside. When the connecting screw is screwed onto the threaded post, the connecting ring and the seal are held on the housing by the retainer.

[0014] Compared with existing technologies, the beneficial effects of this technical solution are: through improvement, the number of external power connectors can be reduced, the total power connectors occupy the internal space of the product and the number of installation ports can be reduced, more space can be reserved for waterproof design and the risk of water seepage caused by too many installation ports can be avoided, which is more conducive to improving waterproof safety performance.

[0015] On the other hand, the present invention also provides the following technical solution: a single-source dual-mode portable liquid heater with higher safety protection, including a housing, the mouth of the housing having an openable cup lid, characterized in that the cup lid has a steam exhaust channel communicating with the mouth of the cup, the steam exhaust channel has an upward-facing air outlet and an exhaust end channel continuous with the air outlet, the exhaust end channel is arranged from bottom to top, and the cup lid is provided with a breathable protective net separated from the air outlet; A waterproof and breathable membrane is provided on the air outlet channel, and a cavity is formed between the waterproof and breathable membrane and the breathable protective net.

[0016] As a further aspect of the present invention: the cup lid includes a top cover body, and a downwardly extending connecting cylinder is formed on the bottom side of the top cover body. An annular spacer is sleeved inside the connecting cylinder, and the annular spacer is close to the inner top of the connecting cylinder. The inner channel of the annular spacer corresponds to the inner channel of the connecting cylinder. A waterproof and breathable membrane is inserted into the connecting cylinder and rests against the bottom of the annular spacer; It also includes a clamping member, which has a cylindrical upper clamping part that extends from the bottom of the connecting cylinder into the connecting cylinder and presses the edge of the waterproof and breathable membrane against the annular spacer. The clamping member also has a cylindrical lower clamping part located at the bottom of the connecting cylinder and abutting against the bottom surface of the connecting cylinder. It also includes fasteners, which have a lower fastening part that presses the cylindrical lower pressing part upward against the bottom of the connecting cylinder, and an upper cylindrical fastening part that extends upward, the upper cylindrical fastening part constituting a sleeve for fitting the cylindrical lower pressing part and the connecting cylinder. The outer side of the connecting cylinder is connected to the first locking block. The inner side of the cylindrical upper fastening part is connected to the second fastening block that cooperates with the first fastening block. At least the part of the connecting cylinder that is connected to the first fastening block is an elastic structure or at least the part of the cylindrical upper fastening part that is connected to the second fastening block is an elastic structure, which enables the cylindrical upper fastening part to be sleeved upward and fastened onto the connecting cylinder by a fastening method. The lower fastening part has at least one air inlet that corresponds to the internal channel of the cylindrical lower pressing part; Multiple ventilation holes are perforated on the top cover to form the ventilation protective net.

[0017] Compared with the existing technology, the beneficial effects of this technical solution are: through the isolation effect of the cavity, a spatial isolation is formed between the waterproof and breathable membrane and the ventilated holes of the breathable protective mesh. Although hot steam will still generate bubbles after passing through the waterproof and breathable membrane, these bubbles are surrounded by the cavity. Within the containment range of the cavity, the bursting of the bubbles will not cause splashing outside the cup lid or will splash less outside the cup lid, thus improving the safety of hot steam against burns.

[0018] On the other hand, the present invention also provides the following technical solution: a single-source dual-mode portable liquid heater with higher safety protection, comprising a housing, an internal mounting cavity, and an openable lid at the mouth of the housing, characterized in that... The installation cavity contains a primary power supply circuit, a transformer, a secondary power supply circuit, a high-voltage heating element, a low-voltage heating element, a battery pack, and a main control module. An installation port is provided on the outside of the housing, and a high-voltage power supply connector is also provided inside the installation cavity. The high-voltage power supply connector is exposed through the installation port. The high-voltage power supply connector is connected to the input terminal of the primary power supply circuit. After the high-voltage power supply connector is connected to an external high-voltage power source, it transmits high voltage to the primary power supply circuit. The first high-voltage output terminal of the primary power supply circuit is connected to the high-voltage heating element, the second high-voltage output terminal of the primary power supply circuit is connected to the primary winding of the transformer, and the controlled terminal of the primary power supply circuit is connected to the first control terminal of the main control module. The main control module is configured to control the primary power supply circuit to supply power to the high-voltage heating element and / or to the transformer through the first control terminal. The secondary winding of the transformer is connected to the input terminal of the secondary power supply circuit. The primary power supply circuit converts high voltage into low voltage through the transformer to supply the secondary power supply circuit. The power transmission terminal of the secondary power supply circuit is connected to the power connection terminal of the battery pack, the low-voltage output terminal of the secondary power supply circuit is connected to the low-voltage heating element, and the controlled terminal of the secondary power supply circuit is connected to the second control terminal of the main control module. The main control module is configured to control the secondary power supply circuit to supply power to the low-voltage heating element and / or to the battery pack through the second control terminal. The cup lid has a steam exhaust channel that communicates with the cup mouth. The steam exhaust channel has an upward-facing vent and an exhaust end channel that is continuous with the vent. The exhaust end channel is arranged from bottom to top. The cup lid is provided with a breathable protective mesh that separates the vent. A waterproof and breathable membrane is provided on the air outlet channel, and a cavity is formed between the waterproof and breathable membrane and the breathable protective net.

[0019] Compared with existing technologies, the beneficial effects of this technical solution are as follows: Through improvements, the number of external power connectors can be reduced, thus reducing the total space occupied by the power connectors inside the product and the number of installation ports. This allows for more space to be reserved for waterproof design and avoids the risk of water seepage due to excessive installation ports, thereby improving waterproof safety performance. Through the isolation effect of the accommodating cavity, a spatial isolation is formed between the waterproof and breathable membrane and the vents of the breathable protective mesh. Although hot steam will still generate bubbles after passing through the waterproof and breathable membrane, these bubbles are surrounded by the accommodating cavity. Within the containment range of the accommodating cavity, the bursting of the bubbles will not cause splashing outside the lid or will splash less outside the lid, thus improving the safety of preventing scalding from hot steam.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention, including the high-voltage electrical connection portion; Figure 3 yes Figure 2 A partial structural diagram at point A in the middle; Figure 4 This is an exploded view of the structure of the present invention, including the high-voltage power supply connector, with the connecting screws hidden. Figure 5 This is another exploded view of the present invention, including the high-voltage power supply connector portion, and... Figure 4 The view orientations are different; Figure 6 This is an exploded view of the structure of the present invention, showing the mounting cavity and the installed high-power electric heating element and low-power electric heating element; Figure 7 This is another exploded view of the structure of the present invention, including the high-voltage power supply connector portion; Figure 8 This is another exploded view of the structure of the present invention, including the high-voltage power supply connector portion; Figure 9 yes Figure 8 Schematic diagram of the partial structure at point B; Figure 10 This is a structural cross-sectional view of the present invention, including the cup lid portion; Figure 11 This is another structural cross-sectional view of the present invention, including the cup lid portion, and... Figure 10 Compared to the concealed cup cover, the steam exhaust path is indicated by arrow lines with dovetails; Figure 12 This is a circuit block diagram of the present invention.

[0023] The corresponding labels in the attached diagram are explained as follows: Housing-1, Mounting cavity-2, Primary power supply circuit-3, Transformer-4, Secondary power supply circuit-5, First part of secondary power supply circuit-501, Second part of secondary power supply circuit-502 High-voltage heating element - 6, Low-voltage heating element - 7, Battery assembly - 8, Main control module - 9, Mounting port - 10, High-voltage power connector - 11, Connecting pin - 1101, Insulating base - 1102, Connecting surface - 1103, Edge area - 1104, Connecting area - 1105, Socket - 1106, Proximal area - 1107 Inner mounting surface -12, outer mounting surface -13, interface seal -14, sealing edge -1401, sealing middle part -1402, external power supply connection clearance -1403. Retaining member-15, external power supply engagement clearance hole-1501, edge retaining part-1502, channel retaining part-1503, proximal retaining part-1504, positioning hole-1505, snap-in part-1506. Screw post-16, snap-fit ​​part-18, snap-fit ​​groove-1801, protective cover-19, elastic connector-20, connecting ring-21, control input unit-22, cup lid-23, top cover-2301, connecting cylinder-2302, annular spacer-2303, clamping part-2304, upper cylindrical clamping part-2305, lower cylindrical clamping part-2306, fastener-2307, lower fastening part-2308, upper fastening part-2309, first locking block-2310, second locking block-2311, sealing sleeve-2312. Steam exhaust channel-24, air outlet-25, breathable protective net-26, waterproof and breathable membrane-27, accommodating cavity-28, air inlet-29, cup cover-30, air outlet channel-31. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-12 In this embodiment, the single-source dual-mode portable liquid heater with higher safety protection includes a housing 1, and the interior of the housing 1 has a mounting cavity 2.

[0026] The mounting cavity 2 contains a primary power supply circuit 3, a transformer 4, a secondary power supply circuit 5, a high-voltage heating element 6, a low-voltage heating element 7, a battery pack 8, and a main control module 9.

[0027] An installation port 10 is provided on the outer side of the housing 1, and a high-voltage power supply connector 11 is also provided on the housing 1 (inside the installation cavity). The high-voltage power supply connector 11 is exposed through the installation port 10.

[0028] The high-voltage power supply connector 11 is connected to the input terminal of the primary power supply circuit 3. After the high-voltage power supply connector 11 is connected to an external high-voltage power source, it transmits high voltage to the primary power supply circuit 3.

[0029] The first high-voltage output terminal of the primary power supply circuit 3 is connected to the high-voltage heating element 6, the second high-voltage output terminal of the primary power supply circuit 3 is connected to the primary winding of the transformer 4, and the controlled terminal of the primary power supply circuit 3 is connected to the first control terminal of the main control module 9. The main control module 9 controls the primary power supply circuit 3 to supply power to the high-voltage heating element 6 and / or to the transformer 4 (through the first control terminal).

[0030] The secondary winding of transformer 4 is connected to the input terminal of secondary power supply circuit 5.

[0031] The power transmission terminal of the secondary power supply circuit 5 is connected to the power connection terminal of the battery pack 8, and the low-voltage output terminal of the secondary power supply circuit 5 is connected to the low-voltage heating element 7. The controlled terminal of the secondary power supply circuit 5 is connected to the second control terminal of the main control module 9. The primary power supply circuit 3 converts high voltage to low voltage through the transformer 4 to supply power to the secondary power supply circuit 5. The main control module 9 (through the second control terminal) controls the secondary power supply circuit 5 to supply power to the low-voltage heating element 7 and / or to the battery pack 8.

[0032] In this embodiment, the high-voltage power supply can be connected to an external high-voltage power source (such as a 220V power source) through the high-voltage power supply connector 11, and the high-voltage power supply connector 11 can be connected to provide high-voltage input to the primary power supply circuit 3.

[0033] The primary power supply circuit 3 can supply power to the high-voltage heating element 6 for heating at higher temperatures (high-voltage, high-power heating). The primary power supply circuit 3 can also supply low-voltage electricity, i.e., weak current, to the secondary power supply circuit 5 through the transformer 4.

[0034] After receiving low-voltage electricity, the secondary power supply circuit 5 can be used to power the battery assembly 8. The secondary power supply circuit 5 can also be used to power the low-voltage heating element 7 (low-voltage, low-power heating).

[0035] The improvements reduce the number of external power connectors, thus reducing the space occupied by the total power connectors inside the product and the number of installation ports (for external power connectors). This allows for more space for waterproofing design and avoids the risk of water seepage due to too many installation ports, thereby improving waterproofing and safety performance.

[0036] In some embodiments, the high-voltage power connector 11 is, for example, a two-prong connector, a three-prong connector (such as three pins or three sockets arranged in a triangular pattern) or other types of connectors.

[0037] In some embodiments, the high-voltage power connector 11 includes a mating end 1101 and an insulating base 1102.

[0038] The insulating base 1102 has a mating surface 1103 for mating with an external power connector, and an edge region 1104 and a mating area 1105 enclosed by the edge region are formed on the mating surface 1103. The mating end 1101 of the high-voltage power connector is provided in the mating area 1105.

[0039] In some embodiments, such as the mating area 1105 having a recessed socket 1106, the mating pin 1101 is a pin disposed within the socket 1106. The pin extends to protrude from the non-matting surface of the insulating base to form a wiring pin of a high-voltage contact.

[0040] In some embodiments, since the high-voltage power connector 11 is mainly composed of a mating end 1101 and an insulating seat 1102, the insulating seat 1102 can be prepared on the mating end 1101 by injection molding. The gap between the insulating seat 1102 and the mating end 1101 can be well filled and sealed (based on the fluidity of the molten plastic during injection molding and the solid retention after cooling and molding).

[0041] Therefore, the aforementioned mating surface 1103 is essentially impermeable, or in other words, water will not be generated from the insertion hole 1106 of the mating surface 1103 (specifically, the junction between the insulating seat and the mating end foot inside the insertion hole) through the insulating seat 1102.

[0042] In some embodiments, the portion of the housing 1 with the mounting opening has an inner mounting surface 12 facing the inside of the housing and an outer mounting surface 13 facing the outside of the housing.

[0043] The insulating base 1102 is connected to the housing 1, and the edge region 1104 of the mating surface is close to or abuts the inner mounting surface 12, thus forming a mating region 1105 and at least the proximal region 1107 on the edge region that is close to the mating region corresponding to the mounting port 10.

[0044] The housing 1 is also provided with an interface seal 14. The interface seal 14 includes a sealing edge portion 1401 corresponding to the outer mounting surface 13, and a sealing middle portion 1402 surrounded by the sealing edge portion 1401. The sealing middle portion 1402 extends inward from the outer mounting surface along the mounting opening to the proximal region 1107 near or abutting the engagement area. An external power engagement clearance opening 1501 corresponding to the engagement area 1105 is provided on the sealing middle portion 1402.

[0045] The housing 1 is also provided with a retainer 15, which is connected to the housing 1 and is configured to press the sealing edge portion 1401 against the outer mounting surface 13, and to press the sealing middle portion 1402 against the proximal region 1107 of the edge region. The retainer 15 has an external power engagement clearance hole 1501 corresponding to the engagement region 1105.

[0046] In some embodiments, the retainer 15 also constitutes a mechanism for pressing the sealing intermediate portion 1402 against the inner wall of the channel of the mounting port 10.

[0047] In some embodiments, the retainer 15 has an edge retaining portion 1502 corresponding to the sealing edge portion 1401 (for pressing the sealing edge portion onto the outer mounting surface), a channel retaining portion 1503 corresponding to the channel inner wall of the mounting port 10 (for pressing the sealing middle portion onto the channel inner wall of the mounting port), and a proximal retaining portion 1504 corresponding to the proximal region 1107 (for pressing the sealing middle portion onto the proximal region of the edge region).

[0048] In some embodiments, at least one protruding threaded post 16 is formed on the outer mounting surface 13, and a positioning hole 1505 that mates with the threaded post is provided on the sealing edge portion 1401. The threaded post 16 passes through the positioning hole 1505 along the axial direction of the threaded post 16.

[0049] The retainer 15 has a connecting hole that mates with the screw post.

[0050] The housing is also provided with a connecting screw (not shown) that mates with the screw hole post 16. The connecting screw is screwed onto the screw hole post 16 and forms a structure that fastens the retainer 15 together with the sealing edge 1401 to the outer mounting surface 13 along the axial direction of the screw hole post 16.

[0051] In some embodiments, the interface seal 14 is an elastic seal, such as a silicone seal. The retainer 15 is a component with a harderness than the interface seal, such as a plastic component with a harderness than the interface seal. When connected by connecting screws, the retainer 15 can elastically compress the interface seal 14, resulting in better waterproofing performance.

[0052] In some embodiments, the external power supply engagement clearance hole 1501 is arranged to expand outward from the inside to form an insertion guide slope.

[0053] In some embodiments, the screw hole studs 16 are all located on one side of the mounting opening on the outer mounting surface 13.

[0054] The housing 1 has a snap-fit ​​portion 18 extending outward beyond the outer mounting surface. The snap-fit ​​portion 18 is located on the other side of the mounting opening opposite to the screw hole post on the outer mounting surface 13. A snap-fit ​​groove 1801 is formed on the side of the snap-fit ​​portion 18 facing the screw hole post, and a snap-fit ​​portion 1506 is formed on the retainer 15 to mate with the snap-fit ​​groove.

[0055] When connecting the retainer 15, first insert the retainer's snap-in portion 1506 laterally into the snap-in groove 1801. The width of the snap-in groove 1801 is greater than the thickness of the snap-in portion 1506. Then, using the snap-in portion 1506 as a fulcrum, press the retainer 15 onto the interface seal 14 by "prying" or "rotating" and make the connecting hole on the retainer 15 correspond to the screw hole post 16. Finally, tighten the connecting screw.

[0056] During the "prying" or "rotating" process, the retainer 15 continuously compresses the interface seal 14. A good clamping effect can be achieved with only a few connecting screws.

[0057] In some embodiments, the sealing edge portion 1401 does not extend outward beyond the snap-fit ​​groove 1801, so as to leave at least a certain snap-fit ​​groove opening space to facilitate the insertion of the snap-fit ​​portion 1506.

[0058] The thickness of the sealing edge portion 1401 can preferably satisfy the following condition: when the snap-in portion 1506 is inserted into the snap-in groove 1801, the snap-in portion 1506 forms a compression on the sealing edge portion 1401, so that the interface seal 14 can be fully compressed when the above-mentioned "prying" or "rotation" is performed.

[0059] In some embodiments, the housing 1 is further provided with a protective cover 19, which constitutes an external power engagement clearance hole 1501 that can be opened to cover the retainer.

[0060] In some embodiments, the injection molding seal at the junction of the insulating seat 1102 of the high-voltage power connector and the mating end 1101, the sealing of the insulating seat 1102 of the high-voltage power connector through the interface seal 14, the retainer 15 and the housing 1 through the connection, and the external cover formed by the protective cover 19 can form a triple waterproof (or three-level waterproof) design, which effectively prevents water from entering the housing from the connector position, thus improving the safety performance of the product.

[0061] In some embodiments, a resilient connector 20 is connected to the protective cover 19, and a connecting ring 21 that engages with the screw post is connected to the resilient connector 20.

[0062] The screw post 16 passes through the positioning hole and the connecting ring from the inside to the outside. When the connecting screw is screwed onto the screw post 16, the connecting ring 21 and the interface seal 14 are held on the housing 1 by the retainer 15, thus forming a single connection corresponding to multiple protection structures.

[0063] With the connecting ring 21 held in place, the protective cover 19 is reset via the resilient connector 20 to the external power engagement clearance hole 1501 of the cover retainer. When a connector needs to be plugged in, the user can forcefully lift the protective cover to expose the connector.

[0064] In some embodiments, transformer 4 can be a gallium nitride transformer or a silicon nitride transformer, which has good heat dissipation performance.

[0065] In some embodiments, the heating elements 6 and 7 can be configured as heating tubes to heat the liquid in the housing. For example, when the housing is configured as a cup, it can be used to heat the inner liner of the cup or the body of the cup filled with water to heat the water inside.

[0066] In some embodiments, the primary power supply circuit 3, the secondary power supply circuit 5, the transformer 4, and the main control module 9 may be integrated on at least one PCB board and connected to each other through conductive contacts on the PCB board or through wires.

[0067] In some embodiments, the secondary power supply circuit 5 includes a first secondary power supply circuit 501 and a second secondary power supply circuit 502. The first secondary power supply circuit 501 is used to connect the transformer 4 and the battery assembly 8, and the second secondary power supply circuit 502 is used to connect the battery assembly 8 and the low-voltage heating element 7.

[0068] The first part, the secondary power supply circuit 501, is used for rectification, filtering, etc., to provide DC power to the battery assembly 8, thereby powering the battery assembly.

[0069] The second secondary power supply circuit 502 is used to controllably supply power to the low-voltage heating element 7. For example, the main control module 9 controls the second secondary power supply circuit 502 to controllably supply power to the low-voltage heating element 7. Commonly, the main control module 9 is equipped with a control input unit 22 (such as a button), which can be controlled by the user to determine whether low-voltage heating is needed, whether to heat quickly (mainly reflected in changes in heating power), whether to heat slowly, or, when a water temperature sensor is configured, to control the water temperature maintenance, etc.

[0070] Preferably, the first secondary power supply circuit 501 can also controllably provide DC power to the battery assembly 8. For example, the main control module 9 controls the first secondary power supply circuit 501 to controllably provide DC power to the battery assembly 8. Commonly, the main control module 9 is equipped with a battery status detection unit to detect the charge status of the battery assembly, thereby controlling the first secondary power supply circuit to make corresponding charging strategies, such as fast charging when the charge is low, trickle charging when the charge is high, and stopping charging when the charge is full. When a battery temperature detection unit is configured, the corresponding strategies may also include over-temperature protection (such as stopping charging or reducing charging current when the temperature is too high).

[0071] Similarly, when the main control module 9 is equipped with a control input unit 22 (such as a button), the user can input control to determine whether high-voltage heating is required. That is, the main control module 9 also controls whether the primary power supply circuit 3 supplies power to the high-voltage heating element, whether to heat quickly (mainly reflected in the change of heating power), and whether to heat slowly; or when equipped with a water temperature sensor, it controls conventional control strategies such as maintaining water temperature or stopping power supply for heating after the water boils.

[0072] Please see Figure 1-12 In this embodiment, the single-source dual-mode portable liquid heater with higher safety protection includes a housing 1, and the mouth of the housing 1 has an openable lid 23.

[0073] The cup lid 23 has a steam exhaust channel 24 communicating with the cup opening. The steam exhaust channel 24 has an upward-facing vent 25 and an exhaust end channel 31 that is continuous with the vent, with the exhaust end channel 31 arranged from bottom to top. The cup lid 23 is provided with a breathable protective mesh 26 that is disposed at the vent.

[0074] A waterproof and breathable membrane 27 is provided on the air outlet channel 31, and a cavity 28 is formed between the waterproof and breathable membrane 27 and the breathable protective net 26.

[0075] In some embodiments, the cup lid 23 includes a top cover 2301, and a downwardly extending connecting cylinder 2302 is formed on the bottom side of the top cover 2301. An annular spacer 2303 is sleeved inside the connecting cylinder 2302. The annular spacer 2303 is close to the inner top of the connecting cylinder 2302, and the inner channel of the annular spacer 2303 corresponds to the inner channel of the connecting cylinder 2302.

[0076] The waterproof and breathable membrane 27 is inserted into the connecting cylinder and abuts against the bottom of the annular spacer 2303.

[0077] The cup lid 23 also includes a clamping member 2304, which has a cylindrical upper clamping part 2305 that extends from the bottom of the connecting tube into the connecting tube and presses the edge of the waterproof and breathable membrane against the annular spacer. The clamping member 2304 also has a cylindrical lower clamping part 2306 located at the bottom of the connecting tube and abutting against the bottom surface of the connecting tube.

[0078] The cup lid 23 also includes a fastener 2307, which has a lower fastening portion 2308 that presses the cylindrical lower pressing portion upward against the bottom of the connecting cylinder, and an upper cylindrical fastening portion 2309 that extends upward. The upper cylindrical fastening portion 2309 is configured to fit the cylindrical lower pressing portion 2306 and the connecting cylinder 2302 together.

[0079] The outer side of the connecting cylinder 2302 is connected to the first locking block 2310, and the inner side of the cylindrical upper fastening part 2309 is connected to the second locking block 2311 that cooperates with the first locking block. At least the part of the connecting cylinder that is connected to the first locking block is an elastic structure or at least the part of the cylindrical upper fastening part that is connected to the second locking block is an elastic structure, so that the cylindrical upper fastening part 2309 can be sleeved upward and locked onto the connecting cylinder 2302 by locking.

[0080] The lower cylindrical fastening part 2308 has at least one air inlet 29 that corresponds to the internal channel of the lower cylindrical clamping part 2306. The top opening of the connecting cylinder 2302 forms an air outlet 25.

[0081] Multiple vent holes are provided on the top cover 2301 at the part corresponding to the air outlet, so that the structure of this area forms a breathable protective net 26.

[0082] The steam discharge channel consists of an outlet, an inner channel of an annular partition, an inner channel of the upper cylindrical pressing part, an inner channel of the lower cylindrical pressing part, and an inlet.

[0083] In this embodiment, by setting the annular spacer 2303, a cavity 28 of a specified volume can be formed while ensuring that the waterproof and breathable membrane 27 is kept in the steam exhaust channel. That is, the thickness of the annular spacer 2303 determines the height of the cavity, making the volume of the cavity 28 controllable. In actual production, annular spacers of different thicknesses and corresponding clamping parts can be replaced according to different cavity volume requirements without replacing the top cover of different models, which has good adaptability.

[0084] Preferably, the cup lid 23 is further provided with a sealing sleeve 2312, which is fitted onto the fastener 2307. The sealing sleeve 2312 has an opening corresponding to the air inlet. The sealing sleeve 2312 is, for example, a silicone sealing sleeve, so that water is not easily leaked from the lid when it is closed.

[0085] In some embodiments, the annular spacer 2303 and the clamping member 2304 are, for example, silicone parts, which are used to hold the waterproof and breathable membrane 27 in place while preventing damage to the waterproof and breathable membrane 27.

[0086] In this embodiment, the accommodating cavity 28 creates a spatial isolation between the waterproof and breathable membrane 27 and the ventilated holes of the breathable protective net 26. Although hot steam will still generate bubbles after passing through the waterproof and breathable membrane 27, these bubbles are surrounded by the accommodating cavity 28. Within the containment range of the accommodating cavity 28, the bursting of the bubbles will not cause splashing outside the cup lid or will cause minimal splashing outside the cup lid, thus improving the safety of preventing scalding from hot steam.

[0087] In some embodiments, the housing 1 may also be opened to cover a cup cover 30, which covers the mouth of the cup and the lid of the cup, and serves to prevent dust and provide protection.

[0088] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A single-source dual-mode portable liquid heater with enhanced safety protection, comprising a housing, the interior of which has a mounting cavity, characterized in that, The installation cavity contains a primary power supply circuit, a transformer, a secondary power supply circuit, a high-voltage heating element, a low-voltage heating element, a battery pack, and a main control module. An installation port is provided on the outside of the housing, and a high-voltage power supply connector is also provided inside the installation cavity. The high-voltage power supply connector is exposed through the installation port. The high-voltage power supply connector is connected to the input terminal of the primary power supply circuit. After the high-voltage power supply connector is connected to an external high-voltage power source, it transmits high voltage to the primary power supply circuit. The first high-voltage output terminal of the primary power supply circuit is connected to the high-voltage heating element, the second high-voltage output terminal of the primary power supply circuit is connected to the primary winding of the transformer, and the controlled terminal of the primary power supply circuit is connected to the first control terminal of the main control module. The main control module is configured to control the primary power supply circuit to supply power to the high-voltage heating element and / or to the transformer through the first control terminal. The secondary winding of the transformer is connected to the input terminal of the secondary power supply circuit. The primary power supply circuit converts high voltage into low voltage through the transformer to supply the secondary power supply circuit. The power transmission terminal of the secondary power supply circuit is connected to the power connection terminal of the battery pack, the low-voltage output terminal of the secondary power supply circuit is connected to the low-voltage heating element, and the controlled terminal of the secondary power supply circuit is connected to the second control terminal of the main control module. The main control module controls the secondary power supply circuit to supply power to the low-voltage heating element and / or to the battery pack through the second control terminal.

2. The single-source dual-mode portable liquid heater according to claim 1, characterized in that, High-voltage electrical connectors include mating leads and insulating bases formed on the mating leads; The insulating base has a mating surface for engaging with an external power connector, and an edge area and a mating area enclosed by the edge area are formed on the mating surface, with mating end feet disposed in the mating area; The portion of the housing with the mounting opening has an inner mounting surface facing the inside of the housing and an outer mounting surface facing the outside of the housing; The insulating base is connected to the housing, and the edge area of ​​the mating surface is close to or abuts the inner mounting surface, thus forming a mating area and at least the proximal area of ​​the edge area close to the mating area corresponding to the mounting port. The housing is also provided with an interface seal, which includes a sealing edge portion corresponding to the outer mounting surface and a sealing middle portion enclosed by the sealing edge portion; the sealing middle portion extends inward from the outer mounting surface along the mounting opening to the proximal region near or abutting the engagement area, and the sealing middle portion is provided with an external power engagement clearance opening corresponding to the engagement area. The housing is also provided with a retainer, which is connected to the housing and is configured to press the sealing edge portion against the outer mounting surface and to press the sealing middle portion against the proximal region of the edge area; the retainer has an external power engagement clearance hole corresponding to the engagement area.

3. The single-source dual-mode portable liquid heater according to claim 2, characterized in that, The retainer also serves to press the middle part of the seal against the inner wall of the channel at the mounting port.

4. The single-source dual-mode portable liquid heater according to claim 2, characterized in that, The outer mounting surface has at least one protruding screw post, and the sealing edge has a positioning hole that mates with the screw post. The retainer has a connecting hole that mates with the threaded post, and the threaded post passes through the positioning hole along the axial direction of the threaded post; It is also equipped with a connecting screw that mates with the threaded post. The connecting screw is screwed onto the threaded post and forms a structure that fastens the retainer together with the sealing edge to the outer mounting surface along the axial direction of the threaded post.

5. The single-source dual-mode portable liquid heater according to claim 4, characterized in that, The screw holes are all located on one side of the mounting opening on the outer mounting surface; The housing has a snap-fit ​​portion that extends outward beyond the outer mounting surface. The snap-fit ​​portion is located on the other side of the mounting opening opposite to the screw hole post on the outer mounting surface. A snap-fit ​​groove is provided on the side of the snap-fit ​​portion facing the screw hole post. The retainer has a snap-fit ​​portion formed on it that mates with the snap-fit ​​groove; The thickness of the groove is greater than the thickness of the snap-in part. This configuration allows the retainer to be pressed onto the interface seal by using the snap-in part as a fulcrum and by prying or rotating, after the snap-in part of the retainer is laterally inserted into the snap-in groove, and the connecting hole on the retainer aligns with the screw hole post.

6. The single-source dual-mode portable liquid heater according to claim 5, characterized in that, The interface seal is an elastic seal, and the retainer is a component with a hardness greater than that of the interface seal; The sealing edge does not extend outward beyond the snap-fit ​​groove; The thickness of the sealing edge is such that when the snap-in part is inserted into the snap-in groove, the snap-in part compresses the sealing edge.

7. The single-source dual-mode portable liquid heater according to claim 4, characterized in that, It is also equipped with a protective cover, which forms an external power engagement clearance hole for the openable cover retainer; The protective cover is connected to an elastic connector, and the elastic connector is connected to a connecting ring that fits into the screw hole post. The threaded post passes through the positioning hole and the connecting ring sequentially from the inside to the outside. When the connecting screw is screwed onto the threaded post, the connecting ring and the seal are held on the housing by the retainer.

8. A single-source dual-mode portable liquid heater with enhanced safety protection, comprising a housing, the mouth of which has an openable lid, characterized in that: The cup lid has a steam exhaust channel that communicates with the cup mouth. The steam exhaust channel has an upward-facing vent and an exhaust end channel that is continuous with the vent. The exhaust end channel is arranged from bottom to top. The cup lid is provided with a breathable protective mesh that separates the vent. A waterproof and breathable membrane is provided on the air outlet channel, and a cavity is formed between the waterproof and breathable membrane and the breathable protective net.

9. The single-source dual-mode portable liquid heater according to claim 8, characterized in that, The cup lid includes a top cover body, and a downwardly extending connecting cylinder is formed on the bottom side of the top cover body. An annular spacer is sleeved inside the connecting cylinder, and the annular spacer is close to the inner top of the connecting cylinder. The inner channel of the annular spacer corresponds to the inner channel of the connecting cylinder. A waterproof and breathable membrane is inserted into the connecting cylinder and rests against the bottom of the annular spacer; It also includes a clamping member, which has a cylindrical upper clamping part that extends from the bottom of the connecting cylinder into the connecting cylinder and presses the edge of the waterproof and breathable membrane against the annular spacer. The clamping member also has a cylindrical lower clamping part located at the bottom of the connecting cylinder and abutting against the bottom surface of the connecting cylinder. It also includes fasteners, which have a lower fastening part that presses the cylindrical lower pressing part upward against the bottom of the connecting cylinder, and an upper cylindrical fastening part that extends upward, the upper cylindrical fastening part constituting a sleeve for fitting the cylindrical lower pressing part and the connecting cylinder. The outer side of the connecting cylinder is connected to the first locking block. The inner side of the upper fastening part of the cylindrical shape is connected to a second fastening block that cooperates with the first fastening block. At least the part of the connecting cylinder that is connected to the first fastening block is an elastic structure or at least the part of the upper fastening part of the cylindrical shape that is connected to the second fastening block is an elastic structure, which enables the upper fastening part of the cylindrical shape to be sleeved upward and fastened to the connecting cylinder by a fastening method. The lower fastening part has at least one air inlet that corresponds to the internal channel of the cylindrical lower pressing part; Multiple ventilation holes are perforated on the top cover to form the ventilation protective net.

10. A single-source dual-mode portable liquid heater with enhanced safety protection, comprising a housing, an internal mounting cavity, and an openable lid at the mouth of the housing, characterized in that... The installation cavity contains a primary power supply circuit, a transformer, a secondary power supply circuit, a high-voltage heating element, a low-voltage heating element, a battery pack, and a main control module. An installation port is provided on the outside of the housing, and a high-voltage power supply connector is also provided inside the installation cavity. The high-voltage power supply connector is exposed through the installation port. The high-voltage power supply connector is connected to the input terminal of the primary power supply circuit. After the high-voltage power supply connector is connected to an external high-voltage power source, it transmits high voltage to the primary power supply circuit. The first high-voltage output terminal of the primary power supply circuit is connected to the high-voltage heating element, the second high-voltage output terminal of the primary power supply circuit is connected to the primary winding of the transformer, and the controlled terminal of the primary power supply circuit is connected to the first control terminal of the main control module. The main control module is configured to control the primary power supply circuit to supply power to the high-voltage heating element and / or to the transformer through the first control terminal. The secondary winding of the transformer is connected to the input terminal of the secondary power supply circuit. The primary power supply circuit converts high voltage into low voltage through the transformer to supply the secondary power supply circuit. The power transmission terminal of the secondary power supply circuit is connected to the power connection terminal of the battery pack, the low-voltage output terminal of the secondary power supply circuit is connected to the low-voltage heating element, and the controlled terminal of the secondary power supply circuit is connected to the second control terminal of the main control module. The main control module is configured to control the secondary power supply circuit to supply power to the low-voltage heating element and / or to the battery pack through the second control terminal. The cup lid has a steam exhaust channel that communicates with the cup mouth. The steam exhaust channel has an upward-facing vent and an exhaust end channel that is continuous with the vent. The exhaust end channel is arranged from bottom to top. The cup lid is provided with a breathable protective mesh that separates the vent. A waterproof and breathable membrane is provided on the air outlet channel, and a cavity is formed between the waterproof and breathable membrane and the breathable protective net.

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