WO2011147294A1 - 电热水壶 - Google Patents
电热水壶 Download PDFInfo
- Publication number
- WO2011147294A1 WO2011147294A1 PCT/CN2011/074507 CN2011074507W WO2011147294A1 WO 2011147294 A1 WO2011147294 A1 WO 2011147294A1 CN 2011074507 W CN2011074507 W CN 2011074507W WO 2011147294 A1 WO2011147294 A1 WO 2011147294A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electric kettle
- conductive terminal
- electromagnetic switch
- heat generating
- armature
- Prior art date
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
- A47J27/21158—Devices to detect overheating or boiling with a single control element or unit
Definitions
- the invention relates to an electric kettle, in particular to an electric kettle capable of regulating the heating temperature of water.
- the electric kettle has become a small household appliance widely used by ordinary households and units.
- Conventional electric kettles are generally provided with a temperature sensor with bimetal.
- the working principle is as follows: adding an appropriate amount of water to the electric kettle, and then placing the electric kettle on the power base; the user presses the power switch handle of the electric kettle, the electric kettle is powered on, the heating device starts to heat the water; the water is heated and burned
- the bimetal temperature sensor is deformed due to the rise to the boiling temperature, and then the switch spring is driven by the deformation of the bimetal, the switch is disconnected, the power of the electric kettle is cut off, and the power switch of the electric kettle is reset.
- the heating device is no longer heated.
- the electric kettle control switch mainly adopts a bimetal as a temperature sensor, thereby controlling the temperature of the boiling and anti-drying functions of the electric kettle, and basically automating the boiling of the water. That is: when the water boils, the electric kettle can automatically disconnect the power supply and no longer heat the water; when the electric kettle does not cause dry burning, the temperature control switch can automatically cut off the power, no longer heating, to prevent the electric kettle from overheating. And it was damaged.
- this conventional electric kettle has the following disadvantages: it can only control a certain temperature point of the electric kettle, and can not control the temperature heated by water.
- the main object of the present invention is to provide an electric kettle capable of regulating the temperature of water heating, low cost, and convenient operation.
- an electric kettle comprising a kettle body, an NTC thermistor, a heat generating device and a PCB board, the heat generating device separating the kettle body into two upper and lower spaces
- an electromagnetic switch and a driving mechanism in the lower space one end of the driving mechanism corresponds to an armature bracket in the electromagnetic switch in a spatial position, and the other end of the driving mechanism protrudes from a side of the kettle body
- the opening and closing of the electromagnetic switch also controls the turning on and off of the two pairs of contact switches.
- two pairs of the contact switches simultaneously control the disconnection of the power source in the heat generating device and the PCB board. Since the contact switch simultaneously controls the disconnection of the power source in the heat generating device and the PCB board, the electric kettle is prevented from being in the EUP safety detection, and the power loss of the standby power of the PCB board is also reduced, and the power is also reduced. Safety requirements reduce the cost of electronic components. This is a significant improvement over the electrically adjustable thermoelectric kettles of the prior art.
- the driving mechanism is disposed on the PCB board or is disposed on the side wall of the kettle body or is disposed at the bottom of the kettle body through a connecting seat.
- the switching of the two pairs of the contact switches is controlled by an extension arm provided in the armature holder.
- the two sides of the extension arm are respectively provided with shoulders, and the shoulders are respectively located on the upper surfaces of the first conductive terminals of the two contact switches.
- the two sides of the extension arm are respectively provided with shoulders, and the shoulders are respectively between the first conductive terminal and the second conductive terminal of the two contact switches.
- the turning on and off of the two pairs of the contact switches are controlled by a block provided in the armature holder, and the block has a structure in which the upper end has a small lower end.
- the block is an inverted trapezoidal block or an inverted triangular block.
- the electromagnetic switch of the present invention is further provided with a reset device for facilitating separation of the contact switches from each other, and the reset device is an elastic member.
- the electromagnetic switch of the present invention is further provided with a temperature sensor and a driving rod, and the temperature sensor is attached to the heat generating device, and two ends of the driving rod are respectively in contact with an edge of the temperature sensor and the armature bracket.
- the bottom of the heat generating device of the present invention is further provided with a bimetal temperature sensor.
- the invention realizes the adjustment of the boiling water temperature under the low cost condition that the relay or the thyristor is not provided by providing the electromagnetic switch and the driving mechanism in the electric kettle.
- the invention has the advantages of convenient operation, reliable operation and low cost.
- Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
- Figure 2 is a front elevational view of the electromagnetic switch of the first embodiment
- 2a is a schematic structural view of another extension arm in the first embodiment
- Figure 3 is a left side view of the electromagnetic switch of the first embodiment
- Figure 4 is a plan view of the electromagnetic switch of the first embodiment
- Figure 5 is a front elevational view of the electromagnetic switch in the second embodiment of the present invention.
- Figure 6 is a left side view of the electromagnetic switch of the second embodiment
- Figure 7 is a plan view of the electromagnetic switch of the second embodiment
- Figure 8 is a front elevational view showing the electromagnetic switch in the third embodiment of the present invention.
- Figure 9 is a left side view of the electromagnetic switch of the third embodiment.
- Figure 10 is a plan view of the electromagnetic switch of the third embodiment
- 1-body, 2-base, 3-electromagnetic switch 301-base, 3011-bracket, 3012-positioning hole, 3013-through hole, 3015-cylindrical seat, 3021-armature bracket, 3022-armature, 3023-extension Arm, 3024-electromagnetic coil, 3025-shoulder, 3026-inverted trapezoidal block, 3027-crest, 304-switching shrapnel, 3041-first conductive terminal, 3042-second conductive terminal, 305-spring, 4-drive mechanism , 401-handle, 402-drive arm, 5-heating device, 6- PCB board, 7-temperature sensor, 701-driver, 702-connector.
- the embodiment mainly includes a kettle body 1 and a base 2.
- the kettle body 1 is provided with an NTC thermistor, a heat generating device 5, a switching device and a PCB board 6.
- the heat generating device 5 divides the kettle body 1 into two upper and lower spaces, and the NTC thermistor is disposed at The upper space detects the temperature of the water (the NTC thermistor may also be disposed at the bottom of the heat generating device to determine the temperature of the heated water.
- the setting of the NTC thermistor is in the electric kettle for measuring the water temperature electronically.
- the switching device and the PCB board 6 are disposed in a lower space, and the NTC thermistor generally adopts an NTC negative temperature coefficient thermistor.
- the switching device comprises an electromagnetic switch 3 and a driving mechanism 4, the electromagnetic switch 3 is fixedly disposed on the PCB board 6, and the driving mechanism 4 is movably disposed on a side wall of the kettle body 1 (or is disposed at an active position)
- the PCB board 6 is movably disposed at the bottom of the kettle body 1 through a connection base.)
- the PCB board 6 is substantially a control circuit.
- One end of the drive mechanism 4 corresponds in space to the armature bracket 3021 in the electromagnetic switch 3, and the other end of the drive mechanism 4 extends out of the side wall of the kettle body 1.
- the PCB board 6 is fixed on the heat generating device 5 by a bracket.
- the movable mechanism of the driving mechanism 4 is disposed on the side wall of the kettle body 1 to mean that the pivot point of the middle portion of the driving mechanism 4 is hinged with the kettle body 1.
- the driving mechanism 4 The driving arm 402 is in position and corresponding to the armature bracket 3021 in a movable contact (the movable contact means that the driving arm 402 and the armature bracket 3021 are separated from each other in a spatial position or the driving arm 402 and the armature bracket 3021 can slide parallel to each other along the guide rail in the horizontal direction.), the handle 401 of the driving mechanism 4 protrudes through the through hole on the side wall of the kettle body 1 and protrudes outside the kettle body 1 .
- the electromagnetic switch 3 includes a base 301, a bracket 3011, an armature bracket 3021, and an electromagnetic coil 3024.
- the electromagnetic coil 3024 and the bracket 3011 are fixedly disposed on the base 301.
- One end of the armature bracket 3021 is disposed at the top end of the bracket 3011 by a pin.
- the armature bracket 3021 is fixedly mounted with an armature 3022.
- each pair of the contact switches includes a switch spring 304 and a second conductive terminal 3042, wherein the switch One end of the elastic piece 304 is provided with a first conductive terminal 3041 that cooperates with the second conductive terminal 3042.
- the switch spring piece 304 and the second conductive terminal 3042 may be disposed on the PCB board 6 in addition to the base 301.
- the first conductive terminal 3041 is connected to the power input end
- the second conductive terminal 3042 is connected to the control circuit and the heating element (or the second conductive terminal 3042 is connected to the power input end, the first conductive terminal 3041 and
- the control circuit is connected to the heating element.).
- An extension arm 3023 is further integrally formed on the armature bracket 3021.
- the two sides of the extension arm 3023 are respectively provided with a shoulder 3025.
- the first conductive terminal 3041 and the second conductive terminal 3042 are in a tight contact state, and the shoulders 3025 are respectively located in the Between the first conductive terminal 3041 and the second conductive terminal 3042.
- the contact switch can also be designed to: the first conductive terminal 3041 and the said contact switch are not affected by an external force
- the second conductive terminals 3042 are in a separated state, and the shoulders 3025 are respectively located on the upper surfaces of the first conductive terminals 3041.
- the electromagnetic switch 3 is further provided with a reset device for facilitating separation of the contact switches from each other, and the reset device is a spring 305 (other elastic materials such as rubber and silicone may be used in actual manufacturing. , shrapnel, etc. can also play a reset role.).
- a cylindrical seat 3015 is further integrally formed at a position of a symmetrical center line of the base 301.
- the cylindrical seat 3015 is drilled with a positioning hole 3012, and the spring 305 is disposed at the positioning.
- a hole 3012 is formed between the hole 3012 and the stud 3027 on the extension arm 3023.
- the driving portion on the armature holder 3021 is driven by the spring 305, and the shoulder 3025 extending from the two sides of the extending arm 3023 will be
- the first conductive terminal 3041 is pulled up to separate the first conductive terminal 3041 from the second conductive terminal 3042.
- the switch elastic piece 304 is generally made of a flexible copper piece such as a constantan sheet or a beryllium bronze.
- the first conductive terminal 3041 and the second conductive terminal 3042 are responsible for turning on or off the power supply in the PCB board 6 and the heat generating device 5.
- the spring 305 may not be provided (as shown in FIG. 1 because the electromagnetic switch 3 is It is fixed on the PCB board 6 in reverse.).
- the working process and working principle of the embodiment are as follows: when the user needs to boil water, the user pours water into the kettle body 1 of the electric kettle, and places the kettle body 1 on the power base 2 to adjust the kettle body 1 On the boiling water temperature knob, set the temperature to which the water needs to be heated, such as 90 °C. Then, the external handle 401 in the driving mechanism 4 is pressed, and the driving mechanism 4 is circularly moved around the movable setting point. At this time, the driving arm 402 presses the armature holder 3021, and the pressed armature holder 3021 Rotating about the bracket 3011, the shoulder 3025 is also approaching the base 301.
- the first conductive terminal 3041 When the shoulder 3025 moves away from the first conductive terminal 3041, the first conductive terminal 3041 is in contact with the second conductive terminal 3042. After the first conductive terminal 3041 and the second conductive terminal 3042 are in contact with each other, the control circuit is powered on, and the control circuit energizes the electromagnetic coil 3024 to generate suction, and the fixed armature 3022 on the armature holder 3021 is sucked to make the first conductive terminal. 3041 and the second conductive terminal 3042 maintain a good conduction state. Since the first conductive terminal 3041 is in contact with and electrically connected to the second conductive terminal 3042, the heat generating device 5 is energized and heated to start heating the water in the kettle body 1.
- the control circuit sends a signal to de-energize the solenoid coil 3024, and the solenoid coil 3024 loses the suction force.
- the armature bracket 3021 rotates around the bracket 3011, and the armature 3022 leaves the electromagnetic coil 3024.
- the shoulder 3025 is away from the base 301 and pulls up the first conductive terminal 3041, and finally makes the first conductive
- the terminal 3041 is separated from the second conductive terminal 3042, and the heat generating device 5 and the control circuit are powered off. In this way, the electric kettle completes a process of boiling water.
- the control circuit here generally adopts an MCU microprocessor and peripheral power supply circuits, drive circuits and control switches.
- the control circuit can also be constructed by using ordinary electronic circuits and digital circuits.
- the circuit connection mode is generally: from the power supply ⁇ two pairs of contact switches ⁇ control circuit and the heat generating device 5, the switching of the switch is controlled by whether the electromagnetic coil 4 is energized or the handle 401.
- the temperature protection switch will be added to the general circuit, such as: bimetal temperature sensor, then the connection method is: from the power supply ⁇ two pairs of contact switches ⁇ bimetal temperature sensor ⁇ control circuit and Heating device 5.
- the switch of the bimetal temperature sensor can also be connected in front of (behind) the two pairs of the contact switches or connected behind the control circuit, in front of the heating device 5, as needed.
- the bimetal temperature sensor of the general bimetal temperature sensor is directly attached to the heat generating device 5, and directly senses the temperature of the heat generating device 5. Its main function is to detect the temperature change of the heat generating device 5. When the temperature of the heat generating device 5 exceeds the deformation temperature of the bimetal temperature sensor, the bimetal temperature sensor generates a kick and drives the switching mechanism of the bimetal temperature sensor to turn off the power, thereby effectively protecting the heat generating device 5 from being It will work over temperature, which will protect the electric kettle from damage due to excessive temperature.
- the main difference is that a new electromagnet switch is provided. Therefore, in this embodiment, the electromagnet switch will be further described in detail, and the installation mode of the electromagnet switch is set. Reference can be made to Figure 1 in the first embodiment.
- the electromagnetic switch 3 includes a base 301, a bracket 3011, an armature bracket 3021, and an electromagnetic coil 3024.
- the electromagnetic coil 3024 and the bracket 3011 are fixedly disposed on the base 301.
- One end of the armature bracket 3021 is disposed at the top end of the bracket 3011 by a pin.
- the armature bracket 3021 is fixedly mounted with an armature 3022.
- each pair of the switch switches includes two switch springs 304 , and each of the switch springs 304 One end is provided with a first conductive terminal 3041 and a second conductive terminal 3042 that cooperate with each other.
- the switch spring piece 304 may be disposed on the PCB board 6 in addition to the base 301.
- the first conductive terminal 3041 is connected to the power input end
- the second conductive terminal 3042 is connected to the control circuit and the heating element (or the second conductive terminal 3042 is connected to the power input end, the first conductive terminal 3041 and
- the control circuit is connected to the heating element.).
- the armature bracket 3021 is also fixedly provided with a block having a large upper end and a lower end (which may also be integrally formed), and the block may be an inverted trapezoidal block 3026 or an inverted triangular block.
- an inverted trapezoidal block 3026 is disposed, and the inverted trapezoidal block 3026 is disposed between the two pairs of contact switches, and the top ends of the two switch springs 304 contacting the inverted trapezoidal block 3026 are respectively provided with The chamfers of the inclined faces of the inverted trapezoidal block 3026 are described.
- the contact switch is not subjected to an external force, the first conductive terminal 3041 and the second conductive terminal 3042 are in a separated state.
- the electromagnetic switch 3 is further provided with a reset device for facilitating separation of the contact switches from each other, and the reset device is a spring 305 (other elastic materials such as rubber, silica gel, etc. may be used in actual use. Shrapnel, etc. can also play a reset role.).
- a cylindrical seat 3015 is further integrally formed at a position of a symmetrical center line of the base 301.
- the cylindrical seat 3015 is drilled with a positioning hole 3012.
- the spring 305 is disposed at the positioning hole 3012 and Between the studs 3027 on the inverted trapezoidal block 3026.
- the driving portion on the armature holder 3021 is separated from the first conductive terminal 3041 by the elastic force of the spring 305.
- a conductive terminal 3041 and the second conductive terminal 3042 are in a separated and disconnected state.
- the switch elastic piece 304 is generally made of a flexible copper piece such as a constantan sheet or a beryllium bronze.
- the first conductive terminal 3041 and the second conductive terminal 3042 are responsible for turning on or off the power supply in the PCB board 6 and the heat generating device 5.
- the spring 305 may not be disposed. (As shown in FIG. 1, since the electromagnetic switch 3 is fixed upside down on the PCB board 6.)
- the working process and working principle of the embodiment are as follows: when the user needs to boil water, the user pours water into the kettle body 1 of the electric kettle, and places the kettle body 1 on the power base 2. Adjust the boiling water temperature knob on the kettle body 1 to set the temperature to which the water needs to be heated, such as 90 °C. Then, the external handle 401 in the drive mechanism 4 is pressed, and the drive mechanism 4 moves in a circular motion around the movable set point. At the same time, the driving arm 402 presses the armature holder 3021, and the pressed armature holder 3021 rotates around the bracket 3011, and the inverted trapezoidal block 3026 also approaches the base 301.
- the armature 3022 fixed on the armature holder 3021 also gradually approaches the electromagnetic coil 3024.
- the control circuit is powered on, and the control circuit energizes the electromagnetic coil 3024 to generate suction, and the fixed armature 3022 on the armature holder 3021 is sucked, so that the inverted trapezoid block 3026 is caused.
- the first conductive terminal 3041 is always pressed to keep the first conductive terminal 3041 and the second conductive terminal 3042 in contact with each other.
- the first conductive terminal 3041 and the second conductive terminal 3042 are both elastic conductive materials, and as long as the external force overcomes the elasticity, the deformation is caused by the force.
- the heat generating device 5 is energized and heated to start heating the water in the kettle body 1.
- the control circuit sends a signal to de-energize the solenoid coil 3024, and the solenoid coil 3024 loses the suction force.
- the armature bracket 3021 is subjected to a reset mechanism, that is, a spring 305.
- the armature bracket 3021 rotates around the bracket 3011, the armature 3022 leaves the electromagnetic coil 3024, and the inverted trapezoidal block 3026 is away from the base 301. Finally, the inverted trapezoidal block 3026 leaves the first conductive terminal 3041, and the first conductive terminal 3041 automatically returns to its original state due to its elasticity.
- the first conductive terminal 3041 and the second conductive terminal 3042 are also separated and disconnected, the heat generating device 5 and the control circuit are powered off, the heat generating device 5 is no longer heated, and the control circuit is no longer working. In this way, the electric kettle completes a process of boiling water.
- the control circuit here also adopts an MCU microprocessor and peripheral power supply circuits, drive circuits and control switches.
- the circuit connection method is the same as that of the embodiment (1).
- the electromagnet switch 3 is further provided with a mechanism for separating the first conductive terminal 3041 and the second conductive terminal 3042 from each other during dry burning. This mechanism will be described in further detail in this embodiment.
- the mechanism includes a temperature sensor 7 and a drive rod 701 coupled thereto.
- the temperature sensor 7 is a bimetal temperature sensor, and the temperature sensor 7 is fixedly disposed on the base 301.
- the base 301 is provided with a through hole 3013 concentric with the positioning hole 3012, and one end of the driving rod 701 is in contact with the edge of the temperature sensor 7.
- the other end of the driving rod 701 is in contact with the stud 3027 on the inverted trapezoidal block 3026 through the through hole 3013 (the positioning hole 3012 may be additionally disposed such that the other end of the driving rod 701 is
- the inverted trapezoidal block 3026 on the armature holder 3021 is in contact with or directly in contact with the armature holder 3021.
- the front surface of the temperature sensor 7 is in close contact with the heat generating device 5, and the temperature sensor 7 is connected to the base 301 via a connecting piece 702.
- the temperature sensor 7 can also be directly fixed on the heating device 5 or through the connecting piece. 702 is fixed on the PCB board 6.
- the heating device 5 may be heated until the water in the kettle body 1 is dried. If the water in the kettle body 1 is dried, the heat generating device 5 is still When heated, the temperature of the heat generating device 5 in the body 1 will rise sharply. When the temperature of the heat generating device 5 exceeds the temperature at which the temperature sensor 7 is deformed, the bimetal temperature sensor 7 in the body 1 and the heat generating device 5 is closely attached.
- the kicking deformation is generated, and the edge thereof is turned up, and the edge pushes the driving rod 701 to the driving portion of the armature holder 3021, and the armature holder 3021 is pushed up to push the armature 3022 fixed on the armature holder 3021 away from the electromagnetic coil 3024.
- the driving portion on the armature holder 3021 in this embodiment is an inverted trapezoidal block 3026 that is up and down, and is pushed up by the driving rod 701 to no longer press the first conductive terminal 3041, so that the first conductive terminal 3041 and the second conductive terminal 3041
- the conductive terminal 3042 is separated and disconnected, so that both the control circuit and the heat generating device 5 are powered off, and the heat generating device 5 is no longer heated, thereby providing an over-temperature protection function.
- the driving rod 701 also causes the shoulder 3025 to pass the first conductive terminal 3041 during the process of jacking up the extension arm 3023 and the armature holder 3021. Pulling up, the first conductive terminal 3041 and the second conductive terminal 3042 are separated and disconnected, so that both the control circuit and the heat generating device 5 are powered off, and the heat generating device 5 is no longer heated, which also functions as an over temperature protection.
- the temperature sensor 7 is fixed on the base 301 through the connecting piece 702.
- the driving rod 701 is directly pushed by the edge of the bimetal temperature sensor 7, and there are many solutions for pushing the driving rod 701 in actual design.
- the lever mechanism is driven by the deformation of the bimetal temperature sensor 7, and the driving rod 701 is pushed up to open the armature bracket 3021 to achieve the purpose of separating and disconnecting the first conductive terminal 3041 and the second conductive terminal 3042.
- the number of the temperature sensor 7 and the driving rod 701 may be set correspondingly according to actual conditions.
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Description
技术领域
本发明涉及一种电热水壶,特别涉及一种可调控水加热温度的电热水壶。
背景技术
目前,电热水壶已成为普通家庭和单位广泛使用的小家电。传统的电热水壶,一般都设置有带双金属片的温度传感器。其工作原理是:往电热水壶中加入适量的水,然后将电热水壶放在电源底座上;用户按压下电热水壶的电源开关手柄,电热水壶接通电源,发热装置开始加热水;水被加热烧到沸腾时,双金属片温度传感器因升高到沸腾温度发生变形,然后通过双金属片变形突跳来驱动开关簧片,使开关断开,切断电热水壶的电源,电热水壶的电源开关被复位,发热装置不再加热。
上述电热水壶控制开关主要采用双金属片作为温度传感器,从而对电热水壶的水沸腾和防干烧等功能进行温度控制,基本做到了使水烧开的自动化。即:当水烧开沸腾时,电热水壶能够自动断开电源,不再加热水;当电热水壶内无水造成干烧时,温度控制开关能够自动断电,不再加热,防止电热水壶因过热而被损坏。但这种传统的电热水壶存在以下不足:只能对电热水壶某个温度点进行控制,不能对水所加热的温度进行多点控制。即:只能在水达到沸腾的温度点或电热水壶中没有水发生干烧时的超高温度保护温度点进行控制;当用户想要将水加热到85℃或90℃或95℃时,这种电热水壶就不能实现。
在现有技术中,也有可调控温度的电热水壶,如2008年05月30日申请、专利号为:200820048574.6的中国实用新型专利。但目前这种类型的电热水壶都需要安装继电器或可控硅,这样也就导致了电热水壶价格成本的提高;由于现有可调控温度的电热水壶的电源开关都是采用按键的形式,从而不设置电源开关手柄,所以这样对一些已习惯了传统按压方式的客户来说又显得很不方便。
发明内容
根据现有技术中电热水壶所存在的不足,本发明的主要目的是提供一种可调控水加热的温度、成本低、操作方便的电热水壶。
为解决上述技术问题,本发明所采用的技术方案是:一种电热水壶,包括壶体、NTC热敏电阻、发热装置和PCB板,所述发热装置将所述壶体分隔成上下两个空间;在下部空间内设置有电磁开关和驱动机构;所述驱动机构的一端在空间位置上与所述电磁开关中的衔铁支架相对应,所述驱动机构的另一端伸出所述壶体的侧壁;所述电磁开关的通断还控制着两对触片开关的接通与断开。
本发明中两对所述触片开关同时控制所述发热装置和所述PCB板中电源的断通。由于所述触片开关同时控制所述发热装置和所述PCB板中电源的断通,所以就避免了电热水壶在EUP安规检测中,存在PCB板待机电源功率损耗的问题,同时也降低了安规要求,降低了电子元件的成本。此点与背景技术中可调控温度的电热水壶相比,具有显著进步。
本发明中所述驱动机构活动设置在所述PCB板上或活动设置在所述壶体的侧壁上或通过连接座活动设置在所述壶体的底部。
本发明中两对所述触片开关的接通与断开是通过设置在所述衔铁支架中的延伸臂来进行控制。
本发明中所述延伸臂的两侧面分别设置有凸肩,所述凸肩分别处于两触片开关中第一导电端子的上表面。
本发明中所述延伸臂的两侧面分别设置有凸肩,所述凸肩分别处于两触片开关中第一导电端子与第二导电端子之间。
本发明中两对所述触片开关的接通与断开是通过设置在所述衔铁支架中的块状物来进行控制,所述块状物呈上端大下端小的结构。
本发明中所述块状物为倒梯形块或者为倒三角形块。
本发明中所述电磁开关中还安装有便于所述触片开关相互分离的复位装置,所述复位装置为弹性件。
本发明中所述电磁开关中还设置有温度传感器、驱动杆,所述温度传感器贴在所述发热装置上,所述驱动杆的两端分别与温度传感器的边缘和所述衔铁支架相接触。
本发明中所述发热装置的底部还设置有双金属片温度传感器。
本发明与现有技术相比,通过在电热水壶内设置电磁开关和驱动机构,实现在不设置继电器或可控硅的低成本情况下,保证烧水温度的可调。本发明与现有技术相比,还具有操作方便、工作可靠、成本低的优点。
附图说明
图1是本发明实施例一的结构示意图;
图2是实施例一中电磁开关的主视图;
图2a是实施例一中另一种延伸臂的结构示意图;
图3是实施例一中电磁开关的左视图;
图4是实施例一中电磁开关的俯视图;
图5是本发明实施例二中电磁开关的主视图;
图6是实施例二中电磁开关的左视图;
图7是实施例二中电磁开关的俯视图;
图8是本发明实施例三中电磁开关的主视图;
图9是实施例三中电磁开关的左视图;
图10是实施例三中电磁开关的俯视图;
附图中各部分结构的标注说明:
1-壶体、2-底座、3-电磁开关、301-基座、3011-支架、3012-定位孔、3013-通孔、3015-圆柱座、3021-衔铁支架、3022-衔铁、3023-延伸臂、3024-电磁线圈、3025-凸肩、3026-倒梯形块、3027-凸柱、304-开关弹片、3041-第一导电端子、3042-第二导电端子、305-弹簧、4-驱动机构、401-手柄、402-驱动臂、5-发热装置、6-
PCB板、7-温度传感器、701-驱动杆、702-连接片。
具体实施方式
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚明白,以下结合实施例及附图,对本发明进行进一步详细说明。
具体实施例一
如图1、图2、图3、图4所示,其为本发明中的第一实施例。如图1所示,本实施例主要包括壶体1和底座2。所述壶体1内设置有NTC热敏电阻、发热装置5、开关装置和PCB板6,所述发热装置5将所述壶体1分隔成上下两个空间,所述NTC热敏电阻设置在上部空间检测水的温度(所述NTC热敏电阻还可设置在所述发热装置的底部,从而判断加热水的温度。所述NTC热敏电阻的设置方式,在电子测水温的电热水壶中为现有技术。),所述开关装置和所述PCB板6都设置在下部空间内,所述NTC热敏电阻一般采用NTC负温度系数热敏电阻。所述开关装置包括电磁开关3和驱动机构4,所述电磁开关3固定设置在所述PCB板6上,所述驱动机构4活动设置在所述壶体1的侧壁上(或者活动设置在所述PCB板6上、或者通过连接座活动设置在所述壶体1的底部。),实质上所述PCB板6就是一控制电路。所述驱动机构4的一端在空间位置上与所述电磁开关3中的衔铁支架3021相对应,所述驱动机构4的另一端伸出所述壶体1的侧壁。所述PCB板
6通过支架固定在所述发热装置5上,所述驱动机构4活动设置在所述壶体1的侧壁上是指所述驱动机构4中部的支点与壶体1铰接,所述驱动机构4中的驱动臂402与所述衔铁支架3021在位置上相互对应并活动接触(所述活动接触是指:所述驱动臂402与所述衔铁支架3021在空间位置上可相互分开或者所述驱动臂402与所述衔铁支架3021在水平方向上可顺着导轨相互平行滑动。),所述驱动机构4的手柄401穿过所述壶体1侧壁上的通孔伸出所述壶体1外。
如图2所示,所述电磁开关3包括基座301、支架3011、衔铁支架3021、电磁线圈3024,所述电磁线圈3024和所述支架3011都固定设置在所述基座301上,所述衔铁支架3021的一端通过销钉旋转设置在所述支架3011的顶端,所述衔铁支架3021内固定安装有衔铁3022,所述电磁线圈3024通电后可产生磁力吸住所述衔铁3022。关于所述电磁铁开关3的工作原理,还可参照本申请人于2008年10月31日申请
“申请号为:200810217156.X” 的中国发明专利申请文件。
如图3、图4所示,所述基座301上还固定设置有两对卧式的触片开关,每对所述触片开关包括开关弹片304、第二导电端子3042,其中所述开关弹片304的一端设有与所述第二导电端子3042相配合的第一导电端子3041。所述开关弹片304和所述第二导电端子3042除了可以设置在所述基座301上外,还可以设置在所述PCB板6上。所述第一导电端子3041与电源输入端连接,所述第二导电端子3042与控制电路和发热元件连接(或所述第二导电端子3042与电源输入端连接,所述第一导电端子3041与控制电路和发热元件连接。)。所述衔铁支架3021上还一体成形有延伸臂3023,所述延伸臂3023的两侧面分别设置有凸肩3025。在本实施例中,在所述触片开关不受外力作用的情况下,所述第一导电端子3041与所述第二导电端子3042为紧密触合状态,所述凸肩3025分别处在所述第一导电端子3041和所述第二导电端子3042之间。
如图2a所示,作为延伸臂的另一种结构方案,所述触片开关也可设计成:在所述触片开关不受外力作用的情况下,所述第一导电端子3041与所述第二导电端子3042为分离状态,所述凸肩3025分别处在第一导电端子3041的上表面。
如图3所示,所述电磁开关3中还安装有便于所述触片开关相互分离的复位装置,所述复位装置为弹簧305(实际制造中还可采用其他弹性材料,如:橡胶、硅胶、弹片等同样可以起到复位作用。)。如图2、图3所示,在所述基座301的对称中心线位置上还一体成形有圆柱座3015,所述圆柱座3015中钻有定位孔3012,所述弹簧305设置在所述定位孔3012和所述延伸臂3023上的凸柱3027之间。
本实施例中,当所述电磁开关3不工作时,所述衔铁支架3021上的驱动部在所述弹簧305弹力的作用下,所述延伸臂3023两边延伸出的所述凸肩3025将所述第一导电端子3041拉起,使所述第一导电端子3041与所述第二导电端子3042分离断开。所述开关弹片304一般采用康铜片或铍青铜等弹性好的铜片制作。所述第一导电端子3041和所述第二导电端子3042负责接通或断开所述PCB板6和所述发热装置5中的电源。在实际操作中,当所述衔铁支架3021在自身重力的作用下即可导致两所述触片开关相互分离时,可不设置所述弹簧305(如图1所示,因为所述电磁开关3是倒过来固定在所述PCB板6上。)。
作为本发明的优选实施例,还可在考虑制造成本的情况下,通过在所述发热装置底下设置双金属片温度传感器来保持传统的电热水壶所具有的防干烧功能,从而使其与所述NTC热敏电阻一起达到电热水壶的双重保护。
本实施例的工作过程和工作原理如下:当用户需要烧开水时,用户将水倒入电热水壶的所述壶体1后,将所述壶体1放在电源底座2上,调整壶体1上的烧水温度旋钮,设定好水需要加热到的温度,如90℃。然后,将驱动机构4中的外部手柄401按下,所述驱动机构4就绕着活动设置点作圆周运动,这时,所述驱动臂402按压所述衔铁支架3021,被按压的衔铁支架3021绕所述支架3011旋转,所述凸肩3025也向所述基座301靠近。当所述凸肩3025移动到离开第一导电端子3041时,第一导电端子3041与第二导电端子3042接触导通。当第一导电端子3041与第二导电端子3042接触导通后,控制电路接通电源,控制电路使电磁线圈3024通电产生吸力,将衔铁支架3021上固定的衔铁3022吸住,使第一导电端子3041与第二导电端子3042保持良好的导通状态。由于第一导电端子3041与第二导电端子3042接触并导通,发热装置5通电发热,开始加热壶体1内的水。当将壶体1内的水加热到了用户设定的水温时,控制电路发出信号使电磁线圈3024失电,电磁线圈3024失去吸力。衔铁支架3021在复位弹簧305的作用下,衔铁支架3021绕支架3011旋转,衔铁3022离开电磁线圈3024,所述凸肩3025远离基座301并将第一导电端子3041拉起,最终使第一导电端子3041与第二导电端子3042分离断开,发热装置5和控制电路断电,
这样电热水壶就完成了一个烧水的过程。这里的控制电路一般采用MCU微处理器和***的电源电路、驱动电路和控制开关等构成。当然,也可以采用普通电子电路和数字电路构成控制电路。电路连接方式一般是:从电源~两对触片开关~控制电路和发热装置5,开关的通断由电磁线圈4是否通电或者手柄401来控制。当然,为了安全的要求,一般电路里还会增加温度保护开关,如:双金属片温度传感器,那么,其连接方式就是:从电源~两对触片开关~双金属片温度传感器~控制电路和发热装置5。其中,双金属片温度传感器的开关还可以根据需要,连接在两对所述触片开关前面(后面)或者连接在控制电路的后面,发热装置5的前面。其中,一般双金属片温度传感器的双金属片温度传感器直接紧贴安装在发热装置5上,直接感测发热装置5的温度,其主要作用是:用于检测发热装置5的温度变化。当发热装置5的温度超过双金属片温度传感器变形温度时,双金属片温度传感器产生突跳,驱动双金属片温度传感器的开关机构,使其断电,这样就有效地保护了发热装置5不会超温工作,这样也就保护了电热水壶不会因为温度过高而损坏。
具体实施例二
该实施例相对于第一实施例中的方案,主要区别在于提供了一种新的电磁铁开关,故在本实施例中将进一步详细介绍这种电磁铁开关,该电磁铁开关的安装设置方式可参考实施例一中的附图1。
如图5所示,所述电磁开关3包括基座301、支架3011、衔铁支架3021、电磁线圈3024,所述电磁线圈3024和所述支架3011都固定设置在所述基座301上,所述衔铁支架3021的一端通过销钉旋转设置在所述支架3011的顶端,所述衔铁支架3021内固定安装有衔铁3022,所述电磁线圈3024通电后可产生磁力吸住所述衔铁3022。关于所述电磁铁开关3的工作原理,还可参照本申请人于2008年10月31日申请
“申请号为:200810217156.X” 的中国发明专利申请文件。
如图6、图7所示,所述基座301上还固定设置有两对立式的触片开关,每对所述触片开关包括两片开关弹片304,每片所述开关弹片304的一端都设有相互配合的第一导电端子3041和所述第二导电端子3042。所述开关弹片304除了可以设置在所述基座301上外,还可以设置在所述PCB板6上。所述第一导电端子3041与电源输入端连接,所述第二导电端子3042与控制电路和发热元件连接(或所述第二导电端子3042与电源输入端连接,所述第一导电端子3041与控制电路和发热元件连接。)。所述衔铁支架3021上还固定设置有上端大下端小的块状物(也可一体成形),所述块状物可以是倒梯形块3026,还可以是倒三角形块。在本实施例中采用的是倒梯形块3026,所述倒梯形块3026设置在两对触片开关之间,与所述倒梯形块3026相接触的两开关弹片304的顶端分别设有与所述倒梯形块3026的斜面相配的倒角。在本实施例中,所述触片开关不受外力作用的情况下,所述第一导电端子3041与所述第二导电端子3042为分离状态。
如图6所示,所述电磁开关3中还安装有便于所述触片开关相互分离的复位装置,所述复位装置为弹簧305(实际使用中可采用其他弹性材料,如:橡胶、硅胶、弹片等同样可以起到复位作用。)。如图6所示,在所述基座301的对称中心线位置上还一体成形有圆柱座3015,所述圆柱座3015中钻有定位孔3012,所述弹簧305设置在所述定位孔3012和所述倒梯形块3026上的凸柱3027之间。
本实施例中,当所述电磁开关3不工作时,所述衔铁支架3021上的驱动部在所述弹簧305弹力的作用下,所述倒梯形块3026离开第一导电端子3041,所述第一导电端子3041与所述第二导电端子3042处于分离断开状态。所述开关弹片304一般采用康铜片或铍青铜等弹性好的铜片制作。所述第一导电端子3041和所述第二导电端子3042负责接通或断开所述PCB板6和所述发热装置5中的电源。在实际操作中,当所述衔铁支架3021在自身重力的作用下即可导致两所述触片开关相互分离时,可不设置所述弹簧305。(如图1所示,因为所述电磁开关3是倒过来固定在所述PCB板6上。)
本实施例的工作过程和工作原理如下:当用户需要烧开水时,用户将水倒入电热水壶的所述壶体1后,将所述壶体1放在电源底座2上。调整壶体1上的烧水温度旋钮,设定好水需要加热到的温度,如90℃。然后,将驱动机构4中的外部手柄401按下,所述驱动机构4就绕着活动设置点作圆周运动。与此同时,所述驱动臂402按压所述衔铁支架3021,被按压的衔铁支架3021绕所述支架3011旋转,所述倒梯形块3026也向所述基座301靠近。当倒梯形块3026压迫第一导电端子3041并使其变形到与第二导电端子3042接触时,衔铁支架3021上固定的衔铁3022也渐渐靠近所述电磁线圈3024。第一导电端子3041与第二导电端子3042导通时,控制电路接通电源,控制电路使电磁线圈3024通电产生吸力,将衔铁支架3021上固定的衔铁3022吸住,这样就使倒梯形块3026一直压迫第一导电端子3041,使第一导电端子3041与第二导电端子3042保持接触通电。这里第一导电端子3041和第二导电端子3042都是具有弹性的导电材料,只要外力克服其弹性,就会因力的作用产生变形。此时,由于第一导电端子3041与第二导电端子3042接触导通,发热装置5通电发热,开始加热壶体1内的水。当将壶体1内的水加热到了用户设定的水温时,控制电路发出信号使电磁线圈3024失电,电磁线圈3024失去吸力。衔铁支架3021受到复位机构即弹簧305的作用,衔铁支架3021绕支架3011旋转,衔铁3022离开电磁线圈3024,倒梯形块3026远离基座301。最后倒梯形块3026离开第一导电端子3041,第一导电端子3041因其弹性自动恢复原状。这样第一导电端子3041与第二导电端子3042也分离断开,发热装置5和控制电路断电,发热装置5不再发热,控制电路不再工作,
这样电热水壶就完成了一个烧水的过程。这里的控制电路同样采用MCU微处理器和***的电源电路、驱动电路和控制开关等构成。电路连接方式与实施例(一)的相同。
具体实施例三
该实施例相对于第二实施例中的方案,主要区别在于:在电磁铁开关3中还加入了干烧时使所述第一导电端子3041及第二导电端子3042相互分离的机构,故在本实施例中将进一步详细介绍这种机构。
如图8、图9、图10所示,该机构包括温度传感器7和与其相配的驱动杆701。在此实施例中,所述温度传感器7为双金属片温度传感器,所述温度传感器7固定设置在所述基座301上。所述基座301上开有与所述定位孔3012同心的通孔3013,所述驱动杆701的一端与所述温度传感器7的边缘相接触。所述驱动杆701的另一端穿过所述通孔3013与所述倒梯形块3026上的凸柱3027相接触(所述定位孔3012也可另外设置,使所述驱动杆701的另一端与衔铁支架3021上的倒梯形块3026相接触或者直接与所述衔铁支架3021相接触。)。所述温度传感器7的正面紧贴在所述发热装置5上,所述温度传感器7通过连接片702与基座301连接,温度传感器7也可以直接固定在发热装置5上或通过所述连接片702固定在所述PCB板6上。
当发生控制电路损坏或出错时,可能造成发热装置5一直加热,直到将壶体1中的水烧干的情况,若壶体1中的水被烧干时,所述发热装置5仍然还在加热,壶体1中发热装置5的温度将急剧上升,当发热装置5的温度超过温度传感器7变形突跳的温度点时,壶体1内与发热装置5紧贴的双金属片温度传感器7产生突跳变形,其边缘向上翻起,边缘将驱动杆701推向衔铁支架3021的驱动部,将衔铁支架3021推起,将衔铁支架3021上固定的衔铁3022推离电磁线圈3024。本实施例中的衔铁支架3021上的驱动部是上大下小的倒梯形块3026,因其被驱动杆701顶起,不再压迫第一导电端子3041,使第一导电端子3041与第二导电端子3042分离断开,导致控制电路和发热装置5都断电,发热装置5不再加热,起到了超温保护作用。
若将本实施例中的所述机构设置到实施例一中时,所述驱动杆701在顶起所述延伸臂3023和衔铁支架3021的过程中,也使凸肩3025将第一导电端子3041拉起,使第一导电端子3041与第二导电端子3042分离断开,导致控制电路和发热装置5都断电,发热装置5不再加热,同样起到了超温保护作用。
在本实施例中,温度传感器7是通过连接片702固定在基座301上的,通过双金属片温度传感器7的边缘直接推动驱动杆701,实际设计时还有很多方案可以推动驱动杆701,通过双金属片温度传感器7的变形来驱动一个杠杆机构,推动驱动杆701顶开衔铁支架3021,达到使第一导电端子3041与第二导电端子3042分离断开的目的。所述温度传感器7和所述驱动杆701的设置数目还可根据实际情况相应设置一个或多个。
Claims (11)
- 一种电热水壶,包括壶体(1)、NTC热敏电阻、发热装置(5)和PCB板(6),所述发热装置(5)将所述壶体(1)分隔成上下两个空间,其特征在于:它还包括设置在下部空间内的电磁开关(3)和驱动机构(4);所述驱动机构(4)的一端在空间位置上与所述电磁开关(3)中的衔铁支架(3021)相对应,所述驱动机构(4)的另一端伸出所述壶体(1)的侧壁;所述电磁开关(3)的通断还控制着两对触片开关的接通与断开。
- 根据权利要求1所述的电热水壶,其特征在于:两对所述触片开关同时控制所述发热装置(5)和所述PCB板(6)中电源的断通。
- 根据权利要求1所述的电热水壶,其特征在于:所述驱动机构(4)活动设置在所述PCB板(6)上或活动设置在所述壶体(1)的侧壁上或通过连接座活动设置在所述壶体(1)的底部。
- 根据权利要求1所述的电热水壶,其特征在于:两对所述触片开关的接通与断开是通过设置在所述衔铁支架(3021)中的延伸臂(3023)来进行控制。
- 根据权利要求4所述的电热水壶,其特征在于:所述延伸臂(3023)的两侧面分别设置有凸肩(3025),所述凸肩(3025)分别处于两触片开关中第一导电端子(3041)的上表面。
- 根据权利要求4所述的电热水壶,其特征在于:所述延伸臂(3023)的两侧面分别设置有凸肩(3025),所述凸肩(3025)分别处于两触片开关中第一导电端子(3041)与第二导电端子(3042)之间。
- 根据权利要求1所述的电热水壶,其特征在于:两对所述触片开关的接通与断开是通过设置在所述衔铁支架(3021)中的块状物来进行控制,所述块状物呈上端大下端小的结构。
- 根据权利要求7所述的电热水壶,其特征在于:所述块状物为倒梯形块(3026)或者为倒三角形块。
- 根据权利要求8所述的电热水壶,其特征在于:所述电磁开关(3)中还安装有便于所述触片开关相互分离的复位装置,所述复位装置为弹性件。
- 根据权利要求9所述的电热水壶,其特征在于:所述电磁开关(3)中还设置有温度传感器(7)、驱动杆(701),所述温度传感器(7)贴在所述发热装置(5)上,所述驱动杆(701)的两端分别与温度传感器(7)的边缘和所述衔铁支架(3021)相接触。
- 根据权利要求1所述的电热水壶,其特征在于:所述发热装置(5)的底部还设置有双金属片温度传感器。
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CN106954288A (zh) * | 2017-05-16 | 2017-07-14 | 叶人龙 | 智能安全型水壶电热管 |
CN107581890A (zh) * | 2017-09-25 | 2018-01-16 | 中山市韩盈电器有限公司 | 一种智能式控制的节能型电饭煲 |
CN108451358A (zh) * | 2018-03-19 | 2018-08-28 | 广州市吉谷电器科技有限公司 | 一种电磁煮水壶 |
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CN101849767B (zh) * | 2010-05-25 | 2011-10-26 | 晶辉科技(深圳)有限公司 | 电热水壶 |
CN107348833B (zh) * | 2017-08-08 | 2023-01-31 | 广东美想电器有限公司 | 一种电饭煲 |
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