CN210961495U - Anti-overflow electric kettle - Google Patents

Abstract

The utility model discloses an anti-overflow electric kettle, which relates to the field of household appliances, and adopts the technical scheme that the anti-overflow electric kettle comprises a kettle seat, a kettle body arranged on the kettle seat, a weight detection module, a control module and a heating module, wherein the weight detection module comprises a resistance type pressure sensor which is arranged on the kettle seat and used for detecting the weight of the kettle body, comparing the detected weight with the preset weight and outputting a weight detection signal; the control module is electrically connected with the output end of the weight detection module, and outputs a first control signal when receiving a detection signal corresponding to the detected weight being greater than the preset weight; the heating module comprises a heater which is arranged at the bottom in the kettle and electrically connected with the control module, and the heater is powered off when the heating module receives a first control signal. It has avoided wiring on the lateral wall to set up the detector, can let components and parts concentrate on at the bottom of the kettle and kettle seat, has both been favorable to concentrating protection to it, also more elegant appearance.

Description

Anti-overflow electric kettle

Technical Field

The utility model relates to the field of household appliances, in particular to an anti-overflow electric kettle.

Background

At present, an electric kettle is a common electric appliance in life, and water in the kettle body is generally directly heated through an electric heating wire, or a kettle bottom made of metal generates electric eddy current through a constantly changing magnetic field to generate heat. When the water in the electric kettle is too much, the water is in danger of overflowing from the kettle cover after boiling, and the water can contact with a circuit after overflowing to cause short circuit.

In the prior art, a water level sensor is usually arranged on the side wall of a kettle body, and when excessive water is added into the kettle body and the water level sensor is submerged, the water level sensor outputs a corresponding signal and cuts off a heating loop.

Although the electric kettle can be powered off when the water level is too high, so that the danger of water boiling and overflowing is avoided, the water level sensor arranged on the kettle wall needs to be installed on the side wall through a through hole, and corresponding lines need to be arranged on the kettle wall, so that the electric kettle is very inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anti-overflow goes out electric kettle, it has and has avoided wiring on the lateral wall to set up the detector, can let components and parts concentrate on at the bottom of the kettle and kettle seat, has both been favorable to concentrating the protection to it, and the security is high, makes things convenient for production to reduce the process, also more elegant appearance.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an anti-overflow goes out electric kettle, includes kettle seat and sets up the kettle body on the kettle seat, still includes:

the weight detection module comprises a resistance type pressure sensor, the resistance type pressure sensor is arranged on the kettle seat and used for detecting the weight of the kettle body, the weight detection module compares the detected weight with a preset weight and outputs a weight detection signal based on the comparison result;

the control module is electrically connected with the output end of the weight detection module, and outputs a first control signal when receiving a weight detection signal corresponding to the detected weight being greater than the preset weight;

the heating module comprises a heater arranged at the bottom in the kettle, the heating module is electrically connected with the control module and receives an output signal of the control module, and when the heating module receives the first control signal, the heater is powered off.

By adopting the technical scheme, when water is boiled, the water level which overflows serves as the warning water level, the sum of the weight of the water in the kettle body and the water in the kettle body which exceeds the warning water level serves as the preset weight, when the detected weight of the water in the kettle body and the kettle body is higher than the preset weight, the corresponding weight detection signal can trigger the control module to output the first control signal, and after the first control signal is received by the heating module, the heater at the bottom of the kettle is powered off. Because the density of water is unchangeable basically, can indirectly obtain the condition of the internal water level of kettle through the weight of detection water, compare in prior art on the kettle wall directly set up the way that water level detector detected the water level, avoided wiring on the lateral wall to set up the detector, can let components and parts concentrate on at the bottom of the kettle and on the kettle seat, existing to be favorable to carrying out the centralized protection to it, the security is high, and convenient production reduces the process, also more elegant appearance.

Further setting: the kettle seat comprises an upper seat body and a lower support plate, the resistance type pressure sensor comprises a piezoresistor, and the upper seat body is pressed on the lower support plate through the piezoresistor.

By adopting the technical scheme, when the kettle body is arranged on the upper seat body, the pressure of the kettle body and water inside the kettle body is transmitted to the piezoresistor through the upper seat body, and the detection is more accurate.

Further setting: the kettle further comprises a temperature detection module, the temperature detection module comprises a resistance type temperature sensor arranged at the bottom of the kettle body, the resistance type temperature sensor is used for detecting the temperature of the kettle bottom, and the temperature detection module compares the detection temperature with a preset temperature and outputs a temperature detection signal based on the comparison result.

Through adopting above-mentioned technical scheme, under standard atmospheric pressure, the boiling point of water is 100 ℃, and when the temperature at the bottom of the kettle was higher than water, the heat at the bottom of the kettle can be absorbed fast to water, dispels the heat at the bottom of the kettle through gasification for the temperature at the bottom of the kettle keeps in certain extent. When the water in the kettle is dried, the heat of the water at the bottom of the kettle is lost, and the temperature of the kettle is rapidly increased. The resistance type temperature sensor is internally provided with a preset temperature higher than a certain temperature of a water boiling point, and when kettle water is dried to enable the temperature at the bottom of the kettle to rise to be higher than the preset temperature, the temperature detection module outputs a temperature detection signal to the control module, so that the heater is controlled to be powered off.

Further setting: the steam kettle is characterized by further comprising a steam detection module, wherein the steam detection module comprises a bimetallic strip arranged at the top of the kettle body, the bimetallic strip deforms and is conducted after absorbing heat of steam, and the steam detection module outputs a steam detection signal based on the conduction or disconnection of the bimetallic strip.

Through adopting above-mentioned technical scheme, produce a large amount of steam when the water in the kettle boils, the temperature of steam is higher than 100 ℃, releases heat in a large number when meetting the bimetallic strip, and the bimetallic strip is heated and constantly takes place the inflation, and deformation degree reaches the degree that makes two sheetmetals butt each other after a period, and hot water keeps boiling in the kettle in this period, is favorable to cleaing away impurity and the germ of dissolving in the water. When the bimetallic strip is conducted, the steam detection module outputs a corresponding steam detection signal to control the heater to be powered off.

Further setting: the weight detection signal is at a high level when the detected weight is greater than the preset weight, otherwise, the weight detection signal is at a low level; the temperature detection signal is at a high level when the detection temperature is higher than the preset temperature, otherwise, the temperature detection signal is at a low level; the steam detection signal is at a high level when the bimetallic strip is conducted, and is at a low level otherwise.

Further setting: the control module is further electrically connected with the output ends of the temperature detection module and the steam detection module, the control module comprises a first OR gate and a second OR gate, the output ends of the weight detection module and the temperature detection module are electrically connected with the input end of the first OR gate, and the output ends of the first OR gate and the steam detection module are electrically connected with the input end of the second OR gate.

By adopting the technical scheme, when the weight detection signal or the temperature detection signal is at a high level, the first OR gate outputs the high level; when both the weight detection signal and the temperature detection signal are at a low level, the first or gate outputs a low level. When the first or gate or the steam detection module outputs a high level, the second or gate outputs a high level, and when the first or gate and the steam detection module both output a low level, the second or gate outputs a low level.

Further setting: the heating module further comprises:

the controllable switch comprises a detection end and an execution end, the detection end is electrically connected to the output end of the second OR gate, and the execution end controls the heater to be powered off when the control signal of the second OR gate is high level;

the two ends of the fixed switch are respectively electrically connected with the commercial power and the execution end of the controllable switch, the heater is powered off when the fixed switch is disconnected, and the heater is powered on when the execution end is at a low level when the control signal of the second OR gate is on.

By adopting the technical scheme, when the water in the kettle body is excessive, the temperature at the bottom of the kettle is overhigh, and the kettle water is boiled for a long time, the heater is powered off. When the water amount in the kettle is normal, the temperature at the bottom of the kettle is normal, and the kettle water is not boiled or the boiling time is short, the heater is electrified after the fixed switch is closed, and the kettle water starts to be heated normally.

Further setting: the top of the kettle body is provided with an exhaust hole, and the bimetallic strip is arranged in the exhaust hole.

Through adopting above-mentioned technical scheme, steam is discharged via the exhaust hole, and the flow of steam is great, thereby bimetallic strip can be faster to switch on from steam absorption heat.

Further setting: the kettle comprises a kettle body and is characterized in that a kettle nozzle communicated with the inside and the outside of the kettle body is arranged on the side wall of the kettle body, and a filter screen is arranged at the joint of the kettle nozzle and the inner wall of the kettle body.

Through adopting above-mentioned technical scheme, the filter screen can filter kettle water to improve the clean degree of pouring out water.

To sum up, the utility model discloses following beneficial effect has:

1. the arrangement of the detectors on the side walls is avoided, components can be concentrated on the kettle bottom and the kettle seat, the centralized protection of the components is facilitated, the safety is high, the production is convenient, the processes are reduced, and the appearance is more attractive and elegant;

2. the multifunctional kettle has multiple functions, can automatically cut off power when kettle water is boiled for a long time, automatically cut off power when the kettle water is dried, and is simple in structure and easy to realize.

Drawings

FIG. 1 is an exploded view of an anti-overflow electric kettle in this embodiment;

FIG. 2 is a circuit diagram of an anti-overflow electric kettle in the embodiment;

fig. 3 is a sectional view of an anti-overflow electric kettle in the present embodiment.

In the figure, the position of the upper end of the main shaft,

1. a kettle base; 11. an upper base body; 12. a lower support disc; 2. a kettle body; 21. an exhaust hole; 22. a spout; 23. a filter screen;

3. a weight detection module; 31. a resistive pressure sensor;

4. a temperature detection module; 41. a resistance type temperature sensor;

5. a steam detection module; 51. a bimetal;

6. a control module; 61. a first OR gate; 62. a second OR gate;

7. a heating module; 71. a heater;

8. an electrical connector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides an anti-overflow goes out electric kettle, refer to fig. 1 and fig. 2, including kettle seat 1 with set up the kettle body 2 on kettle seat 1, still including setting up the weight detection module 3 in kettle seat 1, set up in the temperature detection module 4 of the 2 bottoms of kettle bodies, set up in the steam detection module 5 at the 2 tops of kettle body, set up in the control module 6 of kettle seat 1, and set up in the heating module 7 of the 2 bottoms of kettle body, weight detection module 3, the output of temperature detection module 4 and steam detection module 5 links to each other with control module 6 electrical property respectively, control module 6's output and heating module 7 electrical property link to each other.

Referring to fig. 1, the kettle base 1 includes an upper base 11 and a lower supporting plate 12 installed at the bottom of the upper base 11, when in use, the lower supporting plate 12 is installed on a desktop or other supporting surface, and the kettle body 2 is installed on the upper base 11 and electrically connected to the upper base 11 through an electrical connector 8. A spout 22 communicating the inside and the outside of the pot body 2 is arranged on the side wall of the pot body 2, and a filter screen 23 is arranged at the joint of the spout 22 and the inner wall of the pot body 2. The top of the pot body 2 is provided with an exhaust hole 21 for exhausting steam in the pot body 2.

Referring to fig. 2, the weight detecting module 3 includes a resistance type pressure sensor 31, a preset weight signal output source 32, and a voltage comparator OA 1. The resistive pressure sensor 31 includes a fixed resistor R11 and a varistor R12 connected in series, the fixed resistor R11 is electrically connected to Vcc, and the varistor R12 is grounded. The piezoresistor R12 is installed between the upper seat body 11 and the lower support plate 12, and the upper seat body 11 is pressed on the lower support plate through the piezoresistor R12. When the pot 2 is placed on the upper base 11, the resistance of the varistor R12 increases with the increase of the water in the pot 2, and the voltage across the varistor R12 increases.

With continued reference to fig. 2, the voltage comparator OA1 includes a non-inverting terminal, an inverting terminal and an output terminal, the non-inverting terminal of the voltage comparator OA1 is electrically connected between the voltage dependent resistor R12 and the fixed resistor R11; the voltage comparator OA1 has an inverting terminal electrically connected to the preset weight signal output source 32, and an output terminal electrically connected to the input terminal of the control module 6 for outputting the weight detection signal to the control module 6. The preset weight signal is preset according to the weight corresponding to the water quantity of the preset highest water level in the upper base body 11, the kettle body 2 and the kettle body 2, and when the preset weight corresponding to the preset weight signal is exceeded, the water in the kettle body 2 has the risk of overflowing during boiling. The voltage comparator OA1 compares the voltage signal inputted from the non-inverting terminal with the predetermined weight signal, and in this embodiment, when the voltage signal inputted from the non-inverting terminal is greater than the predetermined weight signal inputted from the inverting terminal, the weight detection signal is at a high level; when the voltage signal input by the in-phase end is smaller than the preset weight signal input by the reverse end, the weight detection signal is at a low level.

With continued reference to fig. 2, the temperature detection module 4 includes a resistance type temperature sensor 41, a preset temperature signal output source 42, and a voltage comparator OA 2. The resistance type temperature sensor 41 includes a fixed resistor R21 and a thermistor R22 connected in series with each other, the fixed resistor R21 is electrically connected to Vcc, and the thermistor R22 is grounded. The thermistor R22 is mounted at the bottom of the interior of the kettle body 2. When the water in the kettle body 2 is boiled to be dry, the temperature at the bottom of the kettle body 2 can rise rapidly, the resistance value of the thermistor R22 rises along with the rise of the temperature, and the voltage at the two ends of the thermistor R22 rises.

With continued reference to fig. 2, the voltage comparator OA2 includes a non-inverting terminal, an inverting terminal and an output terminal, the non-inverting terminal of the voltage comparator OA2 is electrically connected between the thermistor R22 and the fixed resistor R21; the reverse end of the voltage comparator OA2 is electrically connected to the preset temperature signal output source 42, and the output end is electrically connected to the input end of the control module 6 and outputs a temperature detection signal to the control module 6. As the water in the kettle body 2 continuously absorbs and dissipates the heat at the bottom of the kettle body 2, the temperature at the bottom of the kettle body 2 has an upper limit value. The preset temperature signal output source 42 presets a preset temperature signal according to the upper limit value, and in this embodiment, the temperature corresponding to the preset temperature signal is twenty degrees celsius higher than the upper limit value. When the water in the kettle body 2 is boiled dry, the temperature at the bottom of the kettle body 2 will break through the upper limit value and continuously rise until reaching the preset temperature corresponding to the preset temperature signal. The voltage comparator OA2 compares the voltage signal inputted from the non-inverting terminal with the preset temperature signal, and in this embodiment, when the voltage signal inputted from the non-inverting terminal is greater than the preset temperature signal inputted from the inverting terminal, the temperature detection signal is at a high level; when the voltage signal input by the in-phase end is smaller than the preset temperature signal input by the reverse end, the temperature detection signal is at a low level.

Referring to fig. 2 and 3, the steam detection module 5 includes a bimetal 51K3 and a fixed resistor R3 disposed inside the exhaust hole 21, one of the bimetal 51K3 is electrically connected to the fixed resistor R3, and the other is electrically connected to Vcc. One side of the fixed resistor R3 far away from the K3 is grounded, and one end of the fixed resistor R3 close to the K3 is electrically connected with the input end of the control module 6 as the output end of the steam detection module 5, and outputs a steam detection signal to the control module 6. The bimetal 51 has a thermal deformation characteristic, and two pieces of the bimetal are separated from each other at a normal temperature, at this time, K3 is disconnected, and a steam detection signal is at a low level. When the water in the kettle body 2 is boiled, a large amount of steam passes through the exhaust holes 21, the bimetallic strip 51 deforms after absorbing the heat of the steam until the bimetallic strip contacts with the steam and is electrically connected with the steam, at the moment, the bimetallic strip 51K3 is communicated, and the steam detection signal is at a high level.

Referring to fig. 2, the control module 6 includes a first or gate 61 and a second or gate 62, the output terminals of the weight detection module 3 and the temperature detection module 4 are electrically connected to the input terminal of the first or gate 61, the output terminal of the first or gate 61 and the output terminal of the steam detection module 5 are electrically connected to the input terminal of the second or gate 62, and the output terminal of the second or gate 62 is electrically connected to the input terminal of the heating module 7. The second or gate 62 outputs a first control signal, which is high in the present embodiment, to the heating module 7 when the weight detection signal, the temperature detection signal, or the steam detection signal is high; when the weight detection signal, the temperature detection signal and the steam detection signal are all at low level, the second or gate 62 outputs a second control signal, which is at low level in this embodiment, to the input terminal of the heating module 7.

With continued reference to fig. 2, the heating module 7 comprises a heater 71, a controllable switch comprising, in this embodiment, a transistor Q1 and a relay, and a fixed switch K5, the heater 71 being arranged in the form of a ring in the bottom of the boiler 2, with reference to fig. 3. With continued reference to fig. 2, the base of transistor Q1 is the input terminal of the heating module 7, which is electrically connected to the second or gate 62; the collector of the transistor Q1 is electrically connected to Vcc, and the emitter of the transistor Q1 is electrically connected to a relay. The relay comprises an electromagnetic coil KM and a normally closed relay switch K4, wherein two ends of the electromagnetic coil KM are respectively and electrically connected with an emitting electrode and a ground wire of the triode Q1. The triode Q1 and the electromagnetic coil KM form a detection end of the controllable switch, and the relay switch K4 forms an execution end of the controllable switch. Two ends of the heater 71 are respectively electrically connected with the relay switch K4 and the ground wire, and two ends of the fixed switch K5 are respectively electrically connected with the commercial power and one end of the relay switch K4 far away from the heater 71.

When the fixing switch K5 is turned off, the heater 71 is turned off to stop heat generation. When the fixed switch K5 is closed and the control module 6 inputs the first control signal to the base of the triode Q1, the triode Q1 is turned on and the electromagnetic coil KM is energized, the electromagnetic coil KM controls the relay switch to be turned off, and at this time, the heater 71 is de-energized and stops heating. When the fixed switch K5 is closed and the control module 6 inputs the second control signal to the base of the transistor Q1, the transistor Q1 is not turned on, the relay switch remains closed, and the heater 71 is powered on to start heating.

When the electric kettle does not work, the fixed switch K5 is switched off, and the heater 71 is powered off and can not generate heat. When excessive water is added to the electric kettle and the fixing switch K5 is turned on, the control module 6 outputs a first control signal and the heater 71 is powered off. When a proper amount of water is added into the electric kettle and the fixed switch K5 is turned on, the control module 6 outputs a second control signal, the heater 71 is electrified, and heating is started. When the water in the electric kettle is boiled for a period of time, the control module 6 outputs a first control signal, and the heater 71 is powered off. When the water in the electric kettle is dried, the control module 6 outputs a first control signal, and the heater 71 is powered off.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims (9)

1. The utility model provides an anti-overflow goes out electric kettle, includes kettle seat (1) and sets up kettle body (2) on kettle seat (1), its characterized in that still includes:

the weight detection module (3), the weight detection module (3) comprises a resistance type pressure sensor (31), the resistance type pressure sensor (31) is arranged on the kettle seat (1) and is used for detecting the weight of the kettle body (2), the weight detection module compares the detected weight with a preset weight and outputs a weight detection signal based on the comparison result;

the control module (6) is electrically connected with the output end of the weight detection module (3), and the control module (6) outputs a first control signal when receiving a weight detection signal corresponding to the detected weight being greater than the preset weight;

the heating device comprises a heating module (7), the heating module (7) comprises a heater (71) arranged at the bottom in the kettle, the heating module (7) is electrically connected with the control module (6) and receives an output signal of the control module (6), and when the heating module (7) receives a first control signal, the heater (71) is powered off.

2. The anti-overflow electric kettle as claimed in claim 1, wherein the kettle base (1) comprises an upper base body (11) and a lower support plate (12), the resistance type pressure sensor (31) comprises a piezoresistor, and the upper base body (11) is pressed on the lower support plate through the piezoresistor.

3. The anti-overflow electric kettle of claim 2, further comprising a temperature detection module (4), wherein the temperature detection module (4) comprises a resistance type temperature sensor (41) arranged at the bottom of the kettle body (2), the resistance type temperature sensor (41) is used for detecting the temperature of the kettle bottom, and the temperature detection module compares the detected temperature with a preset temperature and outputs a temperature detection signal based on the comparison result.

4. The anti-overflow electric kettle of claim 3, further comprising a steam detection module (5), wherein the steam detection module (5) comprises a bimetallic strip (51) arranged at the top of the kettle body (2), the bimetallic strip (51) deforms and conducts after absorbing heat of steam, and the steam detection module (5) outputs a steam detection signal based on the conduction or the disconnection of the bimetallic strip (51).

5. The anti-overflow electric kettle of claim 4, wherein the weight detection signal is at a high level when the detected weight is greater than the preset weight, and at a low level otherwise; the temperature detection signal is at a high level when the detection temperature is higher than the preset temperature, otherwise, the temperature detection signal is at a low level; the steam detection signal is at a high level when the bimetal strip (51) is conducted, and is at a low level when the bimetal strip is not conducted.

6. The anti-overflow electric kettle of claim 5, wherein the control module (6) is further electrically connected with the output ends of the temperature detection module (4) and the steam detection module (5), the control module (6) comprises a first OR gate (61) and a second OR gate (62), the output ends of the weight detection module (3) and the temperature detection module (4) are electrically connected with the input end of the first OR gate (61), and the output ends of the first OR gate (61) and the steam detection module (5) are electrically connected with the input end of the second OR gate (62).

7. The anti-overflow electric kettle as claimed in claim 6, wherein said heating module (7) further comprises:

the controllable switch comprises a detection end and an execution end, the detection end is electrically connected to the output end of the second OR gate (62), and the execution end controls the heater (71) to be powered off when the control signal of the second OR gate (62) is in a high level;

the two ends of the fixed switch are respectively electrically connected with the commercial power and the execution end of the controllable switch, the heater (71) is powered off when the fixed switch is disconnected, and the heater (71) is powered on when the control signal of the second OR gate (62) is at a low level and the fixed switch is closed.

8. The anti-overflow electric kettle as claimed in claim 7, wherein the top of the kettle body (2) is provided with an exhaust hole (21), and the bimetallic strip (51) is arranged in the exhaust hole (21).

9. The anti-overflow electric kettle as claimed in claim 8, wherein the side wall of the kettle body (2) is provided with a spout (22) communicating the inside and the outside of the kettle body (2), and a filter screen (23) is arranged at the joint of the spout (22) and the inner wall of the kettle body (2).

Images