CN219661435U - Electric connection coupling system for liquid heater - Google Patents

Abstract

The utility model provides an electric connection coupled system for liquid heater, includes the last connector of installation liquid heater kettle body bottom, installs on the base and with last connector electric connection complex lower connector, install the control panel in the base, last connector include main casing, fixed plate, take temperature control device of thermal-sensitive bimetallic actuator, NTC temperature sensor is for taking metal casing NTC temperature sensor, this NTC temperature sensor top metal casing exposes kettle body surface and kettle internal medium, water level detection probe formation equivalent resistance-capacitance circuit, and NTC shell water detection terminal is drawn to NTC shell in kettle body bottom NTC temperature sensor metal casing, NTC shell water detection terminal wire connection third signal terminal connection for equivalent resistance-capacitance circuit is respectively through third signal terminal and second signal ring connection control panel, thereby form water level detection circuit. The wire connection is not complicated, and the defect that the wires at the bottom of the kettle body are wound in a messy manner is effectively avoided.

Description

Electric connection coupling system for liquid heater

Technical Field

The utility model relates to an electric connection coupling system for a liquid heater, in particular to an electric connection coupling system with water level detection.

Background

At present, a cordless electric kettle connected through a connector is a practical electric appliance for boiling water and making tea, and is convenient to use and popular with people because of low cost and separation of a power line and a kettle body. The base comprises a power line and a PCB control circuit, and a five-core connector which is common in the market can only be provided for the connection of the anode and the cathode of the heating tube at the bottom of the kettle body, the ground line and two end lines of the NTC temperature sensor. The cordless electric kettles with the structure limited by the connector connection have no simple water level detection method for a while. As the water demand on the bottom is larger and larger, the water level detection is more and more important, and two modes are generally adopted, namely, a water level detection module is independently arranged for separating from the connector, so that the water level detection module has huge volume, and the wiring on the kettle bottom and the base is complex and has high cost; the other water level detection wiring is shared with the grounding end of the connector, strong current and weak current are shared in a crossing way, and a great potential safety hazard exists at the moment of failure.

Disclosure of Invention

The utility model aims at providing an electric connection coupling system for a liquid heater, which aims at the defects existing in the prior art, is safe and reliable, has high space utilization rate and can greatly save material cost and labor cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the electric connection coupling system for the liquid heater comprises an upper connector, a lower connector and a control board, wherein the upper connector is arranged at the bottom of a kettle body of the liquid heater, the lower connector is arranged on a base and is in electric connection with the upper connector, the control board is arranged in the base, the upper connector comprises a main shell, a fixed board and a temperature control device with a thermosensitive bimetallic actuator, a first signal pole and five concentric cylinder annular electrodes which are in electric connection with the lower connector in a coupling way are respectively arranged in an annular groove on the back surface of the main shell, the first signal pole, the L pole conducting ring, the N pole conducting ring, the second signal ring, the third signal ring and the grounding ring are respectively connected with three strong electric ends of a controller after being coupled by the lower connector from inside to outside, and the L pole conducting ring, the N pole conducting ring and the grounding ring are respectively connected with three weak electric signal ends of the controller after being coupled by the lower connector; the front surface of the upper connector main shell is provided with an L-pole wiring piece connected with an L-pole conducting ring in a temperature control manner, an N-pole wiring piece connected with an N-pole conducting ring in a temperature control manner, a grounding electrode wiring piece connected with a grounding ring, a first signal wiring piece connected with a first signal pole, a third signal wiring piece connected with a third signal ring and a water level detection probe connected with a second signal ring, wherein the first signal wiring piece and the third signal wiring piece are respectively externally connected with two temperature lead terminals of an NTC temperature sensor, and the externally connected NTC temperature sensor is connected with a control board through the first signal wiring piece and the third signal wiring piece; the NTC temperature sensor is provided with a metal shell, the metal shell at the top of the NTC temperature sensor is exposed out of the surface of the kettle body, an equivalent resistance-capacitance circuit is formed by the medium and the water level detection probe in the kettle body, the metal shell of the NTC temperature sensor at the bottom of the kettle body is led with an NTC shell water detection terminal, and a lead of the NTC shell water detection terminal is connected with a third signal wiring sheet, so that the equivalent resistance-capacitance circuit is connected with a control board through the third signal wiring sheet and a second signal loop respectively, and a water level detection loop is formed.

As an improvement: the water level detection probe is a low water level detection probe.

As an improvement: the utility model provides a water inlet channel of built-in water inlet component has been seted up at the center of last connector and lower connector, water inlet component including the lid locate the inlet tube top and open the metal water outlet cap that has the inlet opening, metal water outlet cap top stretches into the kettle body inside and regard as low water level detection probe, metal water outlet cap and kettle body between seal for metal water outlet cap's well lower part or lower part and liquid isolation, metal water outlet cap's lower limb or lower part go up the components of a whole that can function independently and connect or draw forth metal pin, the other end of metal pin connects the first stretching head of second signal ring in last casing front.

As an improvement: the water inlet channel of the built-in water inlet component forms an upper water inlet channel on the upper connector, the upper water inlet channel forms a column wall with a core hole in the center on the back of the main shell, and the first signal electrode is annularly arranged near the peripheral wall of the column wall.

As an improvement: the metal pin is in a metal sheet shape and comprises an extension section formed by extending downwards from the lower edge or the lower part of the metal water outlet cap in a tilting way and a connector bent at the tail end of the extension section to be parallel to the upper surface of the upper shell, and the connector is provided with a connecting hole for connecting and matching the first extending head.

As an improvement: the water level detection loop is a high water level detection loop, namely the water level detection probe is a high water level detection probe arranged on the inner wall or the top cover of the kettle body.

As an improvement: the center of the upper connector and the center of the lower connector are provided with water inlet channels internally provided with water inlet assemblies, the water inlet channels internally provided with the water inlet assemblies form upper water inlet channels on the upper connector, the upper water inlet channels form column walls with core holes at the centers on the back of the main shell, and the first signal electrode is annularly arranged close to the peripheral walls of the column walls.

The electric connection coupling system for the liquid heater adopts a six-stage connector structure, and the upper connector and the lower connector are respectively provided with an independent and non-shared strong current end so as to ensure safety and stability, and the safety test qualification rate is very high. According to the utility model, the metal shell with the metal shell NTC temperature sensor is adopted, and as the metal shell of the metal shell NTC temperature sensor is exposed out of the surface of the kettle body for installation, an equivalent resistance-capacitance circuit is formed by utilizing the metal shell, liquid in the kettle body and a water level detection probe, and the equivalent resistance-capacitance circuit can not form an equivalent resistance-capacitance circuit when no liquid exists in the kettle body, namely the equivalent resistance-capacitance circuit is disconnected, and the water level detection probe does not work; when the kettle body has liquid, an equivalent resistance-capacitance circuit is formed, and the water level detection probe is used for detecting the water level by coupling the water level detection circuit up and down with the connector. Be equipped with three weak current end on coupling system's last connector, the NTC shell that draws with the metal casing examines the water terminal and inserts the third signal lug of last connector for equivalent resistance-capacitance circuit connects the control panel through third signal lug (81) and second signal ring respectively, thereby form water level detection return circuit, no complicated wiring, effectively avoided the drawback that the kettle body bottom wire is around in disorder, even can directly set up NTC temperature sensor and install on last connector, go up the connection between connector and the NTC temperature sensor also can directly adopt sheetmetal or wire to connect, further simplify the connection, the cost is saved, it is simple and convenient to assemble. The water level detection loop can be a low water level detection loop or a high water level detection loop, and the compatibility is strong only by changing the position of the water level detection probe on the kettle body. For the upper and lower connectors, no matter the upper and lower connectors are internally or externally connected, the three weak electrodes and the strong current do not share in a crossing way, the strong current and the weak current are mutually independent and do not influence on the connection coupling, the connection communication is stable, and the control is reliable.

The utility model is further described below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is a schematic circuit diagram of an electrical connection coupling system for a liquid heater of the present utility model.

Fig. 2 is a schematic structural view of the connection of the upper connector and the NTC temperature sensor.

Fig. 3 is a schematic structural view of the connector on the fixing board in fig. 2.

Fig. 4 is a schematic view of the rear structure of the upper connector.

Fig. 5 is a schematic diagram of the explosive structure of fig. 3.

FIG. 6 is a schematic view of the internal structure of FIG. 3

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an embodiment of an electrical connection coupling system for a liquid heater according to the present utility model includes an upper connector installed at the bottom of a kettle body of the liquid heater, a lower connector installed on a base and electrically connected and matched with the upper connector, and a control board installed in the base, where the upper connector includes a main housing 1, a fixing plate, and a temperature control device with a thermosensitive bimetal actuator, a first signal pole and five concentric cylindrical ring-shaped electrodes which are electrically connected with the lower connector and can be coupled are installed in an annular groove on the back of the main housing, and the first signal pole 4, the L-pole conductive ring 5, the N-pole conductive ring 6, the second signal ring 7, the third signal ring 8 and the ground ring 9 are respectively connected with three strong electrical ends of the controller after being coupled by the lower connector, and the first signal pole 4, the second signal ring 7 and the third signal ring 8 are respectively connected with three weak electrical ends of the controller after being coupled by the lower connector; the front of the upper connector main shell is provided with an L-pole wiring lug 51 connected with the L-pole conducting ring 5 in a temperature control manner, an N-pole wiring lug 61 connected with the N-pole conducting ring 6 in a temperature control manner, a grounding electrode wiring lug 91 connected with the grounding ring 9, a first signal wiring lug 41 connected with the first signal pole 4, a third signal wiring lug 81 connected with the third signal ring 8 and a water level detection probe connected with the second signal ring 7. The first signal lug 41 is the D1 end in the schematic diagram of fig. 1, the third signal lug 81 is the D3 end in the schematic diagram of fig. 1, and the second signal loop 7 is the D2 end in the schematic diagram of fig. 1. The first signal wiring lug 41 and the third signal wiring lug 81 are respectively externally connected with two temperature lead terminals of the NTC temperature sensor 3, and the externally connected NTC temperature sensor 3 is connected with the control board through the first signal wiring lug 41 and the third signal wiring lug 81; the NTC temperature sensor 3 is an NTC temperature sensor with a metal shell, the metal shell (not labeled in the figure) at the top of the NTC temperature sensor 3 exposes the surface of the kettle body to form an equivalent resistance-capacitance circuit with the medium in the kettle body and the water level detection probe, the metal shell at the bottom of the kettle body of the NTC temperature sensor 3 is led with an NTC shell water detection terminal, and the lead of the water detection terminal of the NTC shell is connected with a third signal wiring piece 81, so that the equivalent resistance-capacitance circuit is connected with a control board through the third signal wiring piece 81 and a second signal loop respectively, thereby forming a water level detection loop.

The water level detection circuit of the embodiment is a low water level detection circuit, namely the water level detection probe is a low water level detection probe. The center of last connector and lower connector set up the water inlet channel of built-in water inlet component, water inlet component including the lid locate the inlet tube top and open the metal that has inlet opening 2.1 out water cap 2, metal out water cap top stretches into the internal portion of kettle and regard as water level detection probe, metal out water cap and kettle between seal for metal out water cap's well lower part or lower part and liquid isolation, metal out water cap's lower limb or lower part go up the body coupling or wholly draw forth metal pin 2.2, the other end of metal pin 2.2 connects second signal ring 7 in the positive first stretching head 7.1 of last casing. Because the metal water outlet cap of the water inlet assembly is used as the low water level detection probe, the metal pin structure extends out of the metal water outlet cap and is directly connected with the second signal ring. When the metal water outlet cap extending into the kettle body and serving as the low water level probe detects that the water level is lower than the low water level threshold value, water can automatically enter, dry burning is prevented, and safety is improved. Meanwhile, the position and the structure of the metal water outlet cap are reasonably utilized, the low water level probe is used, an additional low water level monitoring element is not needed, and corresponding material cost and labor cost are saved. The flatness of the inner bottom surface of the kettle body is high, and no excessive openings and sealing arrangement are caused. In particular, the water level detection probe and the metal shell of the NTC temperature sensor are in line with additional insulation requirements (voltage withstand test and insulation thickness) between the metal shell and the heating disc. And moreover, the top of the metal water outlet cap extends into the kettle body to serve as a water level detection probe, two weak current external wires of the upper connector are provided, five wires are provided for the wires of the six-pole connector, the wiring and the space occupation in the kettle bottom are greatly simplified, and the assembly is simple and convenient.

The water inlet channel for installing the water inlet component forms an upper water inlet channel on the upper connector, the upper water inlet channel forms a column wall 11 with a core hole in the center on the back of the main shell, and the first signal electrode 4 is annularly arranged by the peripheral wall of the column wall 11. The layout of the first signal electrode 4 has the advantages of safety and high space utilization rate compared with the scheme of increasing the expansion volume of the polar ring in the prior art, and the whole connector is small in size, so that the internal components are simple to install, meanwhile, the danger caused by wire breakage and mutual adhesion can be effectively avoided, and the whole structure is very compact.

The metal pin 2.2 is in a metal sheet shape and comprises an extension section 2.21 formed by extending downwards from the lower edge or the lower part of the metal water outlet cap in a tilting manner, and a connector 2.22 bent at the tail end of the extension section to be parallel to the upper surface of the upper shell, wherein a connecting hole (marked in the figure) for connecting and matching the first extension head 7.1 is formed in the connector 2.22. The structure is more convenient to assemble, the connection is more stable, and the structure is clearer and simpler. And the connection of the end is finished on the upper connector main shell without corresponding terminals.

Although the present utility model has been described with reference to the above embodiments, it should be understood that the utility model is not limited thereto, but may be modified and altered somewhat by those skilled in the art without departing from the spirit and scope of the present utility model, and the scope of the utility model is therefore to be limited only by the scope of the appended claims.

Claims (7)

1. The utility model provides a liquid heater is with electricity connection coupling system, includes the last connector of installation liquid heater kettle body bottom, installs on the base and with last connector electric connection complex lower connector, installs the control panel in the base, last connector include main casing (1), fixed plate, take temperature control device of thermal-sensitive bimetallic actuator, its characterized in that: the annular groove on the back of the main shell is respectively provided with a first signal pole and five concentric cylinder annular electrodes which are electrically connected with a lower connector in a coupling way, the first signal pole (4), an L-pole conducting ring (5), an N-pole conducting ring (6), a second signal ring (7), a third signal ring (8) and a grounding ring (9) are respectively arranged from inside to outside, the L-pole conducting ring (5), the N-pole conducting ring (6) and the grounding ring (9) are respectively connected with three strong electric ends of the controller after being coupled by the lower connector, and the first signal pole (4), the second signal ring (7) and the third signal ring (8) are respectively connected with three weak electric signal ends of the controller after being coupled by the lower connector; an L-pole lug (51) connected with an L-pole conducting ring (5) in a temperature control manner, an N-pole lug (61) connected with an N-pole conducting ring (6) in a temperature control manner, a grounding lug (91) connected with a grounding ring (9), a first signal lug (41) connected with a first signal pole (4), a third signal lug (81) connected with a third signal ring (8) and a water level detection probe connected with a second signal ring (7) are arranged on the front surface of the upper connector main shell, the first signal lug (41) and the third signal lug (81) are respectively connected with two temperature lead ends of an NTC temperature sensor (3) in an external connection manner, and the external connection NTC temperature sensor (3) is connected with a control board through the first signal lug (41) and the third signal lug (81); the NTC temperature sensor (3) is provided with a metal shell, the metal shell at the top of the NTC temperature sensor (3) is exposed out of the surface of the kettle body to form an equivalent resistance-capacitance circuit with medium in the kettle body and a water level detection probe, the metal shell at the bottom of the kettle body of the NTC temperature sensor (3) is provided with an NTC shell water detection terminal (31), and the NTC shell water detection terminal is connected with a third signal wiring lug (81) through a wire, so that the equivalent resistance-capacitance circuit is connected with a control board through the third signal wiring lug (81) and a second signal ring respectively, and a water level detection loop is formed.

2. The electrical connection coupling system for a liquid heater as recited in claim 1, wherein: the water level detection probe is a low water level detection probe.

3. The electrical connection coupling system for a liquid heater as recited in claim 2, wherein: the utility model provides a water inlet channel of built-in water inlet component has been seted up at the center of last connector and lower connector, water inlet component including lid locate inlet tube top and open metal play water cap (2) that have inlet opening (2.1), metal play water cap top stretches into the kettle body inside and regard as low water level test probe, metal play water cap and kettle body between seal for metal play water cap's well lower part or lower part and liquid isolation, metal play water cap's lower limb or lower part go up the body coupling or integrally draw forth metal pin (2.2), the other end of metal pin (2.2) is connected second signal ring (7) in the positive first stretching out head (7.1) of last casing.

4. The electrically connected coupling system for a liquid heater as in claim 3, wherein: the water inlet channel of the built-in water inlet component forms an upper water inlet channel on the upper connector, the upper water inlet channel forms a column wall (11) with a core hole in the center at the back of the main shell, and the first signal pole (4) is annularly arranged by leaning against the peripheral wall of the column wall (11).

5. The electrically connected coupling system for a liquid heater as claimed in claim 3 or 4, wherein: the metal pin (2.2) is in a metal sheet shape, comprises an extension section (2.21) formed by extending downwards from the lower edge or the lower part of the metal water outlet cap in a tilting manner, and a connector (2.22) bent at the tail end of the extension section to be parallel to the upper surface of the upper shell, wherein a connecting hole for connecting and matching the first extension head (7.1) is formed in the connector (2.22).

6. The electrical connection coupling system for a liquid heater as recited in claim 1, wherein: the water level detection loop is a high water level detection loop, namely the water level detection probe is a high water level detection probe arranged on the inner wall or the top cover of the kettle body.

7. The electrical connection coupling system for a liquid heater as recited in claim 6, wherein: the center of the upper connector and the center of the lower connector are provided with water inlet channels internally provided with water inlet assemblies, the water inlet channels internally provided with the water inlet assemblies form upper water inlet channels on the upper connector, the upper water inlet channels form column walls (11) with core holes in the center on the back of the main shell, and the first signal poles (4) are annularly arranged by the peripheral walls of the column walls (11).