A weighing-controlled electromagnetic kettle and its control method

Abstract

The invention discloses a weighing-controlled electromagnetic kettle and a control method thereof, which belongs to the field of household appliances. The electromagnetic kettle comprises: a heating seat, comprising a base, a support panel, a control module, an electromagnetic heater and a water supply pipeline; the control module comprises a weighing sensor and a central control system, the weighing sensor is located in the base; the electromagnetic heater is mounted above the weighing sensor; the support panel is mounted above the electromagnetic heater, a water supply joint is arranged on the support panel, and the weighing sensor, the electromagnetic heater and the control valve are all electrically connected to the central control system; a kettle body, a water receiving joint is arranged at the bottom of the kettle body, the water receiving joint is provided with a water inlet channel, a first blocking member slidably arranged in the water inlet channel and a first elastic member that pushes the first blocking member to make the first blocking member block the lower end of the water inlet channel, the elastic force of the first elastic member is less than the pressure of the water supply pipeline when supplying water, and the lower end of the water inlet channel can be sealed and connected with the water supply joint.

Description

Technical Field

[0001] The invention belongs to the field of household appliances, and in particular relates to a weighing-controlled electromagnetic kettle and a control method thereof. Background Art

[0002] With the improvement of people's living standards and the acceleration of the pace of life, more and more household appliances have entered consumers' homes to meet people's various needs, and the functions and application scenarios of such household appliances have become increasingly refined to enhance consumers' experience. For example, in order to prevent problems such as dry-boiling of electric kettles, some electric kettles with weight control functions have emerged, such as the Chinese invention application with application number 201810878504.1, an electromagnetic kettle, which discloses the use of a weight sensing controller to control the amount of water added to the electromagnetic kettle. However, since an electromagnetic heater is provided on the base, and the installation position of the electromagnetic heater occupies the space under the kettle, the installation of the weight sensing controller is actually deviated from the bottom of the kettle, which will cause the data measured by the weight sensing controller to be biased and not accurate enough, and the dry-boiling prevention function may fail; in addition, its bottom water inlet structure needs to be equipped with a motor to drive, which is complex in structure and high in cost. Summary of the invention

[0003] Based on this, it is necessary to provide a weighing-controlled electromagnetic kettle and a control method thereof to address the above problems, which can achieve accurate weight control, monitor both low and high water volumes, and have a simpler structure.

[0004] The present invention adopts the following technical solutions:

[0005] A weighing-controlled electromagnetic kettle, comprising:

[0006] A heating seat, comprising a base, a support panel, a control module, an electromagnetic heater and a water supply pipeline; the base is provided with a cavity with an open upper end; the control module comprises a weighing sensor and a central control system, the weighing sensor is located at the bottom of the cavity; the electromagnetic heater is mounted above the weighing sensor; the support panel is mounted above the electromagnetic heater and covers the upper end of the cavity, the support panel is provided with a water supply joint connected to the water supply pipeline, and the water supply joint is provided with a control valve; the weighing sensor, the electromagnetic heater and the control valve are all electrically connected to the central control system;

[0007] A kettle body, wherein a water receiving joint is provided at the bottom of the kettle body, wherein the water receiving joint is provided with a water inlet channel connected to the inner cavity of the kettle body, a first blocking member slidably arranged in the water inlet channel, and a first elastic member which pushes the first blocking member so that the first blocking member blocks the lower end of the water inlet channel, wherein the elastic force of the first elastic member is less than the pressure of the water supply pipeline when supplying water, and the lower end of the water inlet channel can be sealed and connected to the water supply joint.

[0008] After disassembling and carefully studying a conventional electromagnetic kettle with a weight control function, the inventor found that the conventional electromagnetic kettle would have inaccurate control. This is because the weighing device is offset to avoid the installation of the electromagnetic heater, and the center of gravity line of the entire load-bearing object does not coincide with the optimal force line of the weighing device, which leads to a large weighing deviation and inaccurate water volume control. In addition, the bottom water inlet structure of the conventional electromagnetic kettle is too complicated, the production cost is high, and the container malfunctions.

[0009] Based on the above research foundation, we have redesigned and adjusted the weighing control kettle. The support panel, electromagnetic heater and weighing sensor are arranged in sequence from top to bottom. The support panel is used to support the kettle body, transfer the weight to the electromagnetic heater, and finally to the weighing sensor, which is conducive to improving the measurement accuracy of the weighing sensor. At the same time, due to the accuracy of water volume control, the monitoring of low and high water volumes is more guaranteed. In terms of the bottom water inlet of the kettle body, the first elastic member and the first blocking member are used to seal the bottom of the kettle when the kettle body is separated from the heating seat. When the kettle body is placed on the heating seat and the water supply joint and the water receiving joint are connected, since the elastic force of the first elastic member is less than the water supply pressure of the water supply pipeline, when water is added, the water pressure can compress the first elastic member, release the first blocking member from blocking the water inlet channel, and then add water. Compared with the bottom water inlet structure of the conventional electromagnetic water boiler, this solution has a lower production cost, a simpler structure, and is not prone to failure.

[0010] In one embodiment, the heating seat further comprises a heater pressing piece, which is sandwiched between the electromagnetic heater and the weighing sensor, the bottom surface of the heater pressing piece is fixedly connected to the upper end surface of the weighing sensor, and the upper end surface of the heater pressing piece is fixedly connected to the bottom surface of the electromagnetic heater. The heater pressing piece can evenly transfer the weight transferred by the upper electromagnetic heater to the weighing sensor, so as to avoid the influence of the weight unevenness on the measurement accuracy of the weighing sensor.

[0011] In one embodiment, the upper end surface of the heater pressing member is provided with a positioning hole, and the bottom surface of the electromagnetic heater is provided with a positioning column that can be inserted into the positioning hole. Through the above structure, the positioning connection between the heater pressing member and the electromagnetic heater is achieved, avoiding the position of the heater pressing member being offset during transportation and use, which affects the measurement accuracy.

[0012] In one embodiment, the weighing sensor is a piezoresistive sensor; a rigid plate for supporting the weighing sensor is also provided under the weighing sensor, and the rigid plate is provided with a positioning groove for embedding the weighing sensor. The rigid plate is provided to prevent deformation of the part of the base supporting the weighing sensor and thus affect the measurement accuracy.

[0013] In one embodiment, the center of gravity of the kettle body and electromagnetic heater coincides with the force axis of the weighing sensor. By aligning the center of gravity of the load-bearing object with the optimal force axis of the weighing sensor, a more accurate measurement can be achieved.

[0014] In one embodiment, the water supply connector includes a water outlet with a through hole and a base fixing part fixedly connected to the base; the base fixing part is provided with a sliding hole, the water outlet is inserted into the sliding hole and can be lifted up and down in the sliding hole, and a second elastic part is also provided in the sliding hole to push the water outlet upward, and the lower end of the water outlet is connected to the water supply pipeline. The second elastic part can keep the water outlet from being pushed upward, thereby ensuring that when the kettle body is placed on the base, the upper end of the water outlet can keep in contact with the lower end of the water inlet channel to avoid leakage.

[0015] In one embodiment, the water supply connector further includes a second blocking member and a third elastic member; the second blocking member can be raised and lowered in the through hole, and the third elastic member pushes the second blocking member upward so that the second blocking member blocks the upper end of the through hole; a downward pressing protrusion corresponding to the position of the second blocking member is provided at the entrance of the water inlet channel; when the water supply connector and the water receiving connector are assembled in place, the downward pressing protrusion presses the second blocking member downward so that the through hole is connected. When the water supply connector and the water receiving connector are separated, the third elastic member causes the second blocking member to block the through hole of the water outlet member, so that even if the user supplies water at this time, the through hole remains sealed and no water flows out, thereby avoiding water leakage when the kettle body is not on the base.

[0016] The present invention also discloses a control method for the above-mentioned weighing-controlled electromagnetic kettle. After receiving the heating start instruction, the central control system obtains the data of the weighing sensor and calculates the amount of water in the kettle body, and then acts after judging in the following manner:

[0017] When the water level in the kettle is lower than a preset low water level, the heating action of the electromagnetic heater is stopped;

[0018] When the water volume in the kettle body is higher than the preset low water volume, the electromagnetic heater is started for heating.

[0019] The control method monitors the amount of water in the kettle through the measurement data of the weighing sensor, and automatically controls the heating action according to different water amounts to achieve automation.

[0020] In one embodiment, when the electromagnetic heater is heating, the weighing sensor continuously monitors the amount of water in the kettle body, and when the amount of water in the kettle body is lower than a preset low water level, the electromagnetic heater stops heating. The above arrangement can avoid the situation of dry burning due to the continuous evaporation of water during the heating process.

[0021] In one embodiment, when the central control system receives a heating start instruction and the water volume in the kettle body is lower than a preset low water volume, the water supply pipeline is started to add water until the water volume in the kettle body reaches the preset water volume, and then the water addition is stopped and the electromagnetic heater is started to heat. In the above manner, the weighing-controlled automatic electric kettle can automatically identify the water volume and automatically control the water addition action and the heating action.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The weighing-controlled electromagnetic boiling kettle of the present invention directly supports the electromagnetic heater and the supporting panel by arranging the weighing sensor at the bottom of the electromagnetic heater, so that the force is not skewed and the purpose of accurate water volume control is achieved. In addition, the water supply joint and the water receiving joint are used as the bottom water inlet structure of the kettle body, which has a simple structure and lower production cost.

[0024] The control method of the weighing-controlled electromagnetic kettle of the present invention measures the amount of water in the kettle body by a weighing sensor and responds intelligently according to different working conditions to achieve the purpose of automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0026] Figure 1 The overall cross-sectional view of the weighing-controlled electromagnetic kettle of the present invention;

[0027] Figure 2 yes Figure 1 Magnified view at A in the middle;

[0028] Figure 3 yes Figure 2 A cross-sectional view of the middle water inlet connector and the water receiving connector after being separated;

[0029] Figure 4An exploded view of the weighing-controlled electromagnetic kettle of the present invention.

[0030] Reference numerals:

[0031] 1-heating seat; 11-base; 12-support panel; 13-electromagnetic heater; 131-positioning column; 14-weighing sensor; 15-water supply connector; 151-water outlet; 152-base fixing member; 1521-sliding hole; 153-second elastic member; 154-second blocking member; 155-third elastic member; 16-heater pressing member; 162-positioning hole; 17-rigid plate;

[0032] 2-pot body; 21-water receiving joint; 211-water inlet channel; 212-first blocking member; 213-first elastic member; 214-downward pressing convex portion. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0034] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0035] A weighing-controlled electromagnetic kettle, comprising:

[0036] A heating seat, comprising a base, a support panel, a control module, an electromagnetic heater and a water supply pipeline; the base is provided with a cavity with an open upper end; the control module comprises a weighing sensor and a central control system, the weighing sensor is located at the bottom of the cavity; the electromagnetic heater is mounted above the weighing sensor; the support panel is mounted above the electromagnetic heater and covers the upper end of the cavity, there is a gap between the support panel and the base, and they are not in contact, so that the weight is entirely borne by the electromagnetic heater; the support panel is provided with a water supply joint connected to the water supply pipeline, and the water supply joint is provided with a control valve; the weighing sensor, the electromagnetic heater and the control valve are all electrically connected to the central control system;

[0037] A kettle body, the bottom of which is provided with a water receiving joint, the water receiving joint is provided with a water inlet channel connected to the inner cavity of the kettle body, a first blocking member slidably arranged in the water inlet channel, and a first elastic member that pushes the first blocking member so that the first blocking member blocks the lower end of the water inlet channel, the elastic force of the first elastic member is less than the pressure of the water supply pipeline when supplying water, and the lower end of the water inlet channel can be sealed and connected with the water supply joint. The first elastic member can be a spring or a spring or other elastic medium; the supporting panel is a microcrystalline panel.

[0038] The above-mentioned weighing-controlled electromagnetic water boiling kettle has the support panel, electromagnetic heater and weighing sensor arranged in sequence from top to bottom. The support panel is used to support the kettle body, transfer the weight to the electromagnetic heater, and finally to the weighing sensor, which is conducive to improving the measurement accuracy of the weighing sensor. At the same time, due to the accuracy of water volume control, the monitoring of low water volume and high water volume is more guaranteed. In addition, the first elastic member and the first sealing member are used in combination to seal the bottom of the kettle when the kettle body is separated from the heating seat. When the kettle body is placed on the heating seat and the water supply connector and the water receiving connector are connected, since the elastic force of the first elastic member is less than the water supply pressure of the water supply pipeline, when water is added, the water pressure can compress the first elastic member, release the blockage of the water inlet channel by the first sealing member, and then add water. Compared with the bottom water inlet structure of the conventional electromagnetic water boiler, this solution has lower production cost, simpler structure, and is less prone to failure.

[0039] Specifically, the upper end surface of the water inlet channel blocks the upper limit portion of the first blocking member, and a plurality of water-permeable holes are provided on the side wall of the upper end of the water inlet channel to communicate with the inner cavity of the kettle body. The first blocking member includes a first plug rod and a first blocking portion provided at the lower end of the first plug rod; the water inlet channel is provided with a first plug hole for the first plug rod to be inserted below the upper limit portion, and the first elastic member is a spring sleeved on the first plug rod. Through the cooperation of the first plug rod and the first plug hole, the first blocking member is guided to rise and fall, so that the first blocking member does not deflect during the process of rising and falling. When the first elastic member pushes the first blocking member down, the first blocking portion seals the lower entrance of the water inlet channel; when water is added, the first blocking portion is pushed up by the water pressure to compress the first elastic member, opening the lower entrance of the water inlet channel, and the upper end of the first plug rod is against the upper limit portion to prevent the first elastic member from being overly compressed and the first blocking portion from affecting the communication of the water-permeable port.

[0040] Among them, the above-mentioned electromagnetic heater is a heating coil, and the water supply pipeline also includes a water pipe and a water pump. The electromagnetic heater and the water supply pipeline are both conventional technologies in this field. The specific structure can be referred to in conventional technologies and will not be repeated here.

[0041] Furthermore, the heating seat further comprises a heater pressing piece, which is sandwiched between the electromagnetic heater and the weighing sensor, the bottom surface of the heater pressing piece is fixedly connected to the upper end surface of the weighing sensor, and the upper end surface of the heater pressing piece is fixedly connected to the bottom surface of the electromagnetic heater. The heater pressing piece can evenly transfer the weight transferred by the upper electromagnetic heater to the weighing sensor, so as to avoid the influence of the weight unevenness on the measurement accuracy of the weighing sensor.

[0042] It is understandable that the installation and positioning method of the heater pressing member can be designed according to different kettle design conditions, but the design according to the following method has the advantage of reliable structure. The upper end surface of the heater pressing member is provided with a positioning hole, and the bottom surface of the electromagnetic heater is provided with a positioning column that can be inserted into the positioning hole. Through the above structure, the positioning connection between the heater pressing member and the electromagnetic heater is realized, avoiding the position of the heater pressing member from being offset during transportation and use, which affects the measurement accuracy.

[0043] The weighing sensor can be electromagnetic force type, digital type, capacitive type, resistive type weight sensor, etc., preferably a piezoresistive sensor, which has the advantage of reliable performance. A rigid plate for supporting the weighing sensor is also provided below the weighing sensor. The rigid plate is provided with a positioning groove for embedding the weighing sensor. The setting of the rigid plate is to prevent the part of the base supporting the weighing sensor from deforming and affecting the measurement accuracy. Specifically, the rigid plate is a supporting steel plate, which has sufficient strength and is not easy to deform.

[0044] Furthermore, the center of gravity of the kettle body and electromagnetic heater coincides with the force axis of the weighing sensor. By aligning the center of gravity of the load-bearing object with the optimal force axis of the weighing sensor, a more accurate purpose can be achieved.

[0045] Specifically, the water supply connector includes a water outlet member provided with a through hole and a base fixing member fixedly connected to the base; the base fixing member is provided with a sliding hole, the water outlet member is inserted into the sliding hole and can be lifted up and down in the sliding hole, and a second elastic member is also provided in the sliding hole to push the water outlet member upward, and the lower end of the water outlet member is connected to the water supply pipeline. The second elastic member can keep the water outlet member pushed up, and thus can ensure that when the kettle body is placed on the base, the upper end of the water outlet member can keep in contact with the lower end of the water inlet channel to avoid leakage. The second elastic member can be a spring or a spring or other elastic medium, preferably a spring, and a flange is provided on the outside of the water outlet member for the spring to lift itself up.

[0046] In an electromagnetic kettle with a bottom water inlet structure, when the kettle body is separated from the heating seat, the structure at the bottom of the kettle body is used to seal and prevent water leakage from the kettle; when the kettle body is placed on the heating seat and water is added, the two seal together and the water supply is controlled by the valve body. However, if the user accidentally lifts the kettle body and separates it from the heating seat when the valve body is open for water supply, the water supply joint will leak because the valve body is open at this time, filling the heating seat and even penetrating into the heating seat, causing the internal circuit to short-circuit and be damaged. In severe cases, it may even cause a fire, endangering the user's life and property safety, and posing a serious safety hazard. In order to solve this problem, the water supply connector also includes a second blocking member and a third elastic member; the second blocking member can be raised and lowered in the through hole, and the third elastic member pushes the second blocking member upward so that the second blocking member blocks the upper end of the through hole; the entrance of the water inlet channel is provided with a downward pressing protrusion corresponding to the position of the second blocking member, that is, when the water supply connector and the water receiving connector are assembled in place, the downward pressing protrusion presses the second blocking member downward to connect the through hole. When the user lifts the kettle body to separate the water supply connector and the water receiving connector during the water adding process, the third elastic member will immediately push the second blocking member upward to block the through hole of the water outlet, so that even if the valve body is open at this time, the through hole will still remain sealed and will not leak water, thereby avoiding circuit damage caused by water leakage and endangering the life and property safety of the user, and having higher safety. Among them, the third elastic member can be a spring or a shrapnel or other elastic medium, preferably a spring.

[0047] Specifically, the second blocking member includes a second plug rod and a second blocking portion arranged at the upper end of the second plug rod; a second plug hole for inserting the second plug rod is provided in the through hole below the water outlet, and the third elastic member is a spring sleeved on the second plug rod. Through the cooperation of the second plug rod and the second plug hole, the second blocking member is guided to rise and fall, so that no deviation occurs during the process of rising and falling.

[0048] In the above-mentioned method for controlling the electromagnetic kettle by weighing control, after the central control system receives the heating start instruction, it obtains the data of the weighing sensor and calculates the amount of water in the kettle body, and then acts after judging in the following manner:

[0049] When the water level in the kettle is lower than a preset low water level, the heating action of the electromagnetic heater is stopped;

[0050] When the water volume in the kettle body is higher than the preset low water volume, the electromagnetic heater is started for heating.

[0051] The control method monitors the amount of water in the kettle through the measurement data of the weighing sensor, and automatically controls the heating action according to different water amounts to achieve automation.

[0052] The amount of water in the kettle body is calculated by the following method: the central control system obtains the collected data of the weighing sensor, obtains the total weight Gz, subtracts it from the preset gross weight Gm to obtain the water weight Gs, and converts the water weight Gs to obtain the water volume; the preset gross weight Gm is set according to the data obtained by the weighing sensor when the kettle body is empty.

[0053] The inventors found in practice that during the production process, due to the specification differences and raw material differences of different kettles within the tolerance range, the gross weight Gm of the same model of electromagnetic kettles is different. If the water level is directly judged based on the weight obtained by the weighing sensor, errors often occur, affecting the weighing accuracy. Preferably, the gross weight can be pre-set according to the actual weight of each product, and the weighing accuracy can be further improved through "personalized" settings.

[0054] It can be understood that the above-mentioned preset gross weight Gm can be set when the electric kettle product leaves the factory, or it can be designed to refer to the setting of an electronic scale and set by the consumer performing "zero reset" during use.

[0055] When the electromagnetic heater is heating, the weighing sensor continuously monitors the amount of water in the kettle body, and when the amount of water in the kettle body is lower than a preset low water level, the electromagnetic heater stops heating. The above arrangement can avoid the situation of dry burning due to the continuous evaporation of water during the heating process.

[0056] Furthermore, when the central control system receives a heating start instruction and the water volume in the kettle body is lower than a preset low water volume, the water supply pipeline is started to add water until the water volume in the kettle body reaches the preset water volume, and then the water addition is stopped and the electromagnetic heater is started to heat. In the above manner, the weighing-controlled automatic electric kettle can automatically identify the water volume and automatically control the water addition action and the heating action.

[0057] Embodiment 1:

[0058] Reference Figures 1 to 4 , a weighing-controlled electromagnetic kettle, comprising:

[0059] The heating seat 1 comprises a base 11, a support panel 12, a control module, an electromagnetic heater 13 and a water supply pipeline; the base 11 is provided with a cavity with an open upper end; the control module comprises a weighing sensor 14 and a central control system, and the weighing sensor 14 is located at the bottom of the cavity; the electromagnetic heater 13 is mounted above the weighing sensor 14; the support panel 12 is mounted above the electromagnetic heater 13 and covers the upper end of the cavity, and there is a gap between the support panel 12 and the base 11, and they are not in contact, so that the weight thereof is entirely borne by the electromagnetic heater; the support panel 12 is provided with a water supply joint 15 connected to the water supply pipeline, and the water supply joint 15 is provided with a control valve; the weighing sensor 14, the electromagnetic heater 13 and the control valve are all electrically connected to the central control system;

[0060] The kettle body 2 is provided with a water receiving joint 21 at the bottom of the kettle body 2, and the water receiving joint 21 is provided with a water inlet channel 211 communicating with the inner cavity of the kettle body 2, a first blocking member 212 slidably arranged in the water inlet channel 211, and a first elastic member 213 that pushes the first blocking member 212 so that the first blocking member 212 blocks the lower end of the water inlet channel 211, the elastic force of the first elastic member 213 is less than the pressure of the water supply pipeline when supplying water, and the lower end of the water inlet channel 211 can be sealed and connected with the water supply joint 15. Among them, the first elastic member 213 can be a spring or a spring or other elastic medium; the support panel 12 is a microcrystalline panel.

[0061] In the weighing-controlled electromagnetic water-boiling kettle, the support panel 12, the electromagnetic heater 13 and the weighing sensor 14 are arranged in sequence from top to bottom. The support panel 12 is used to receive the kettle body 2, transfer the weight to the electromagnetic heater 13, and finally transfer it to the weighing sensor 14, which is conducive to improving the measurement accuracy of the weighing sensor 14. At the same time, due to the accuracy of water volume control, the monitoring of low water volume and high water volume is more guaranteed. In addition, the first elastic member 213 and the first blocking member 212 are used to seal the bottom of the kettle when the kettle body 2 is separated from the heating seat 1. When the kettle body 2 is placed on the heating seat 1 and the water supply connector 15 and the water receiving connector 21 are connected, since the elastic force of the first elastic member 213 is less than the water supply pressure of the water supply pipeline, when water is added, the water pressure can compress the first elastic member 213, release the blocking of the water inlet channel 211 by the first blocking member 212, and then add water. Compared with the bottom water inlet structure of the conventional electromagnetic water boiler, this solution has a lower production cost, a simpler structure, and is not prone to failure.

[0062] Specifically, the upper end surface of the water inlet channel 211 blocks the upper limit portion of the first blocking member 212, and a plurality of water-permeable holes are provided on the side wall of the upper end of the water inlet channel 211 to communicate with the inner cavity of the kettle body 2. The first blocking member 212 includes a first plug rod and a first blocking portion provided at the lower end of the first plug rod; the water inlet channel 211 is provided with a first insertion hole for the first plug rod to be inserted below the upper limit portion, and the first elastic member 213 is a spring sleeved on the first plug rod. Through the cooperation of the first plug rod and the first insertion hole, the first blocking member 212 is guided to rise and fall, so that it does not deflect during the process of rising and falling. When the first elastic member 213 pushes the first blocking member 212 downward, the first blocking portion seals the lower entrance of the water inlet channel 211; when water is added, the first blocking portion is pushed upward by the water pressure to compress the first elastic member 213, thereby opening the lower entrance of the water inlet channel 211, and the upper end of the first insertion rod is against the upper limit portion to prevent the first elastic member 213 from being overly compressed and the first blocking portion from affecting the connectivity of the water permeable port.

[0063] Among them, the above-mentioned electromagnetic heater 13 is a heating coil, and the water supply pipeline also includes a water pipe and a water pump. The electromagnetic heater 13 and the water supply pipeline are both conventional technologies in this field. The specific structure can be referred to in conventional technologies and will not be repeated here.

[0064] Preferably, the heating seat 1 further comprises a heater pressing piece 16, which is sandwiched between the electromagnetic heater 13 and the weighing sensor 14, and the bottom surface of the heater pressing piece 16 is fixedly connected to the upper end surface of the weighing sensor 14, and can be fixed by screw connection or glue bonding; the upper end surface of the heater pressing piece 16 is fixedly connected to the bottom surface of the electromagnetic heater 13, and can also be fixed by screw connection or glue bonding. The heater pressing piece 16 can evenly transfer the weight transferred by the upper electromagnetic heater 13 to the weighing sensor 14, avoiding the influence of favorable unevenness on the measurement accuracy of the weighing sensor.

[0065] It is understandable that the installation and positioning method of the heater pressing member 16 can be designed according to different kettle design conditions, but the design in the following manner has the advantage of reliable structure. The upper end surface of the heater pressing member 16 is provided with a positioning hole 162, and the bottom surface of the electromagnetic heater 13 is provided with a positioning column 131 that can be inserted into the positioning hole 162. Through the above structure, the positioning connection between the heater pressing member 16 and the electromagnetic heater 13 is realized, avoiding the position of the heater pressing member 16 from being offset during transportation and use, which affects the accuracy of measurement.

[0066] The weighing sensor 14 can be selected from electromagnetic force type, digital type, capacitive type, resistive type weight sensor, etc., preferably a piezoresistive type sensor, which has the advantage of reliable performance. A rigid plate 17 for supporting the weighing sensor 14 is also provided below the weighing sensor 14. The rigid plate 17 is provided with a positioning groove for the weighing sensor 14 to be embedded. The setting of the rigid plate 17 is to prevent the part of the base 11 supporting the weighing sensor 14 from deforming and affecting the measurement accuracy. Specifically, the rigid plate 17 is a supporting steel plate, which has sufficient strength and is not easy to deform.

[0067] Preferably, the center of gravity of the kettle body 2 and the electromagnetic heater 13 coincide with the force axis of the weighing sensor 14. By aligning the center of gravity of the load-bearing object with the optimal force line of the weighing sensor 14, a more precise purpose is achieved. Here, the center of gravity of the kettle body 2 and the electromagnetic heater 13 refers to the vertical line of the center of gravity of the two as a whole. In practice, the shapes of the kettle body 2 and the electromagnetic heater 13 are usually not necessarily regular shapes such as circles and cylinders, so the vertical line of the center of gravity is not necessarily the center line. In other words, the position of the force line of the weighing sensor 14 is not necessarily in the middle of the heating seat 1, but can be set correspondingly with the shape of the kettle body 2 and the electromagnetic heater 13 and the actual center of gravity vertical line, so that the optimal force line of the weighing sensor 14 can coincide with the center of gravity of the kettle body 2 and the electromagnetic heater 13.

[0068] The water supply connector 15 includes a water outlet 151 with a through hole and a base fixing part 152 fixedly connected to the base 11; the base fixing part 152 is provided with a sliding hole 1521, the water outlet 151 is inserted in the sliding hole 1521 and can be lifted up and down in the sliding hole 1521, and the sliding hole 1521 is also provided with a second elastic part 153 for pushing the water outlet 151 upward, and the lower end of the water outlet 151 is connected to the water supply pipeline. The second elastic part 153 can keep the water outlet 151 pushed up, thereby ensuring that when the kettle body 2 is placed on the base 11, the upper end of the water outlet 151 can keep in contact with the lower end of the water inlet channel 211 to avoid leakage. The second elastic part 153 can be a spring or a spring or other elastic medium, preferably a spring, and a flange is provided on the outside of the water outlet 151 for the spring to push itself up.

[0069] In an electromagnetic kettle with a bottom water inlet structure, when the kettle body is separated from the heating seat, the structure at the bottom of the kettle body is used to seal and prevent water leakage from the kettle; when the kettle body is placed on the heating seat and water is added, the two seal together and the water supply is controlled by the valve body. However, if the user accidentally lifts the kettle body and separates it from the heating seat when the valve body is open for water supply, the water supply joint will leak because the valve body is open at this time, filling the heating seat and even penetrating into the heating seat, causing the internal circuit to short-circuit and be damaged. In severe cases, it may even cause a fire, endangering the user's life and property safety, and posing a serious safety hazard. In order to solve this problem, the water supply connector 15 also includes a second blocking member 154 and a third elastic member 155; the second blocking member 154 can be raised and lowered in the through hole, and the third elastic member 155 pushes the second blocking member 154 upward so that the second blocking member 154 blocks the upper end of the through hole; a downward pressing protrusion 214 corresponding to the position of the second blocking member 154 is provided at the entrance of the water inlet channel 211, that is, when the water supply connector 15 and the water receiving connector 21 are assembled in place, the downward pressing protrusion 214 presses the second blocking member 154 downward to connect the through hole. When the user lifts the kettle body to separate the water supply connector 15 and the water receiving connector 21 during the water filling process, the third elastic member 155 will immediately push the second blocking member 154 upward to block the through hole of the water outlet member 151, so that even if the valve body is open at this time, the through hole remains sealed and water will not leak, thus avoiding circuit damage caused by water leakage when the kettle body 2 is not on the base 11, endangering the life and property safety of the user, and providing higher safety. The third elastic member 155 can be a spring or a shrapnel or other elastic medium, preferably a spring.

[0070] Specifically, the second blocking member 154 includes a second plug rod and a second blocking portion arranged at the upper end of the second plug rod, and a sealing ring is also provided on the second blocking portion; a second plug hole for inserting the second plug rod is provided in the through hole below the water outlet, and the third elastic member 155 is a spring sleeved on the second plug rod. Through the cooperation of the second plug rod and the second plug hole, the second blocking member 154 is guided to rise and fall, so that no deviation occurs during the process of rising and falling.

[0071] Embodiment 2:

[0072] In the control method of the weighing-controlled electromagnetic kettle of Example 1, after receiving the heating start instruction, the central control system obtains the data of the weighing sensor 14 and calculates the amount of water in the kettle body 2, and then acts after judging in the following manner:

[0073] 1) When the water level in the kettle body 2 is lower than the preset low water level, the heating action of the electromagnetic heater 13 is suspended, the water supply pipeline is started to add water until the water level in the kettle body 2 reaches the preset water level, the water addition is stopped and the electromagnetic heater 13 is started for heating;

[0074] 2) When the water level in the kettle body 2 is higher than the preset low water level, the electromagnetic heater 13 is started for heating.

[0075] The above control method monitors the amount of water in the kettle body 2 through the measurement data of the weighing sensor 14, and automatically controls the heating action according to different water amounts to achieve automation.

[0076] The amount of water in the kettle body 2 is calculated by the following method: the central control system obtains the collected data of the weighing sensor 14, obtains the total weight Gz, subtracts it from the preset gross weight Gm to obtain the water weight Gs, and converts the water weight Gs to obtain the water amount; the preset gross weight Gm is set according to the data obtained by the weighing sensor 14 when the kettle body 2 is empty.

[0077] The above-mentioned preset gross weight Gm can be set when the electric kettle product leaves the factory, and can also be designed as a reference to the setting of an electronic scale and set by the consumer performing a "zero reset" during use.

[0078] Specifically, the central control system (such as a microprocessor CPU) can obtain a total weight (Gz) based on the digital signal transmitted by the weighing sensor 14. Since the sum of the weights of the kettle body 2, the supporting panel 12, the electromagnetic heater 13, etc. is a fixed gross weight (Gm), the weight of water is obtained by subtracting the gross weight (Gm) from the total weight (Gz) (Gs=Gz-Gm), and the water volume is monitored in real time.

[0079] Preferably, when the electromagnetic heater 13 is heating, the weighing sensor 14 continuously monitors the amount of water in the kettle body 2, and when the amount of water in the kettle body 2 is lower than a preset low water level, the electromagnetic heater 13 stops heating. The above arrangement can avoid the situation of dry burning due to the continuous evaporation of water during the heating process.

[0080] For other contents of the weighing-controlled electromagnetic kettle and the control method thereof described in the present invention, please refer to the prior art and will not be described in detail here.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A weighing-controlled electromagnetic kettle, characterized in that: include: A heating seat, comprising a base, a support panel, a control module, an electromagnetic heater and a water supply pipeline; the base is provided with a cavity with an open upper end; the control module comprises a weighing sensor and a central control system, the weighing sensor is located at the bottom of the cavity; the electromagnetic heater is mounted above the weighing sensor; the support panel is mounted above the electromagnetic heater and covers the upper end of the cavity, the support panel is provided with a water supply joint connected to the water supply pipeline, and the water supply joint is provided with a control valve; the weighing sensor, the electromagnetic heater and the control valve are all electrically connected to the central control system; A kettle body, wherein a water receiving joint is provided at the bottom of the kettle body, wherein the water receiving joint is provided with a water inlet channel communicating with the inner cavity of the kettle body, a first blocking member slidably arranged in the water inlet channel, and a first elastic member for pushing the first blocking member so that the first blocking member blocks the lower end of the water inlet channel, wherein the elastic force of the first elastic member is less than the pressure of the water supply pipeline when supplying water, and the lower end of the water inlet channel can be sealed and connected with the water supply joint; The upper end surface of the water inlet channel blocks the upper limit portion serving as the first blocking member, a plurality of water-permeable holes are provided on the side wall of the upper end of the water inlet channel to communicate with the inner cavity of the kettle body, the first blocking member comprises a first plug rod and a first blocking portion provided at the lower end of the first plug rod; the water inlet channel is provided with a first insertion hole for inserting the first plug rod below the upper limit portion, the first elastic member is a spring sleeved on the first plug rod, and the first plug rod and the first insertion hole cooperate to guide the first blocking member to rise and fall; The water supply joint comprises a water outlet member provided with a through hole and a base fixing member fixedly connected to the base; the base fixing member is provided with a sliding hole, the water outlet member is inserted into the sliding hole and can be lifted up and down in the sliding hole, and a second elastic member is also provided in the sliding hole to push the water outlet member upward, and the lower end of the water outlet member is connected to the water supply pipeline; The water supply joint further includes a second blocking member and a third elastic member; the second blocking member can be raised and lowered in the through hole, and the third elastic member pushes the second blocking member upward so that the second blocking member blocks the upper end of the through hole; A downward pressing protrusion corresponding to the position of the second blocking member is provided at the entrance of the water inlet channel; when the water supply joint and the water receiving joint are assembled in place, the downward pressing protrusion presses the second blocking member downward to connect the through hole.

2. The weighing-controlled electromagnetic kettle according to claim 1, characterized in that: The heating seat also includes a heater pressing piece, which is clamped between the electromagnetic heater and the weighing sensor. The bottom surface of the heater pressing piece is fixedly connected to the upper end surface of the weighing sensor, and the upper end surface of the heater pressing piece is fixedly connected to the bottom surface of the electromagnetic heater.

3. The weighing-controlled electromagnetic kettle according to claim 2, characterized in that: The upper end surface of the heater pressing piece is provided with a positioning hole, and the bottom surface of the electromagnetic heater is provided with a positioning column which can be inserted into the positioning hole.

4. The weighing-controlled electromagnetic kettle according to claim 1, characterized in that: The weighing sensor is a piezoresistive sensor; a rigid plate for supporting the weighing sensor is also provided below the weighing sensor, and the rigid plate is provided with a positioning groove for embedding the weighing sensor.

5. The weighing-controlled electromagnetic kettle according to any one of claims 1 to 4, characterized in that: The center of gravity of the kettle body and the electromagnetic heater coincides with the force axis of the weighing sensor.

6. The control method of a weighing-controlled electromagnetic kettle according to any one of claims 1 to 5, characterized in that: After receiving the heating start instruction, the central control system obtains the data of the weighing sensor and calculates the amount of water in the kettle, and then acts according to the following judgment: When the water level in the kettle is lower than a preset low water level, the heating action of the electromagnetic heater is stopped; When the water volume in the kettle body is higher than the preset low water volume, the electromagnetic heater is started for heating.

7. The control method of the weighing-controlled electromagnetic kettle according to claim 6, characterized in that: When the electromagnetic heater is heating, the weighing sensor continuously monitors the amount of water in the kettle body. When the amount of water in the kettle body is lower than a preset low water level, the electromagnetic heater stops heating.

8. The control method of the weighing-controlled electromagnetic kettle according to claim 6, characterized in that: When the central control system receives a heating start instruction and the water level in the kettle is lower than a preset low water level, the water supply pipeline is started to add water until the water level in the kettle reaches the preset water level, and then the water addition is stopped and the electromagnetic heater is started for heating.

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