CN210989734U

CN210989734U - Liquid heater

Info

Publication number: CN210989734U
Application number: CN201921589387.3U
Authority: CN
Inventors: 郭建刚; 关燃文; 李伟强
Original assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Current assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-07-14
Anticipated expiration: 2029-09-23

Abstract

The utility model relates to a liquid heater, include: the machine body comprises a base and a top cover connected with the base, and an installation space is defined between the base and the top cover; the cup body is arranged on the base and is positioned in the mounting space; the resistance detection device comprises a first electrode and a second electrode, wherein the first electrode is arranged on the top cover, and the second electrode is arranged at the bottom of the cup body; the circuit board is arranged on the machine body, the first electrode and the second electrode are respectively and electrically connected with the circuit board, liquid level rises or bubbles are generated after liquid in the cup body is heated, and the first electrode and the second electrode can be conducted and form a closed loop with the circuit board; and the heating device is electrically connected with the circuit board, and the circuit board can change the voltage loaded on the heating device according to the resistance value between the first electrode and the second electrode. The utility model discloses locate the top and the bottom of cup respectively with resistance detection device's first electrode and second electrode, switch on two electrodes through liquid and form the return circuit, can prevent effectively that liquid from spilling over.

Description

Liquid heater

Technical Field

The utility model relates to the technical field of household appliances, concretely relates to liquid heater.

Background

The existing liquid heaters, such as tea makers, Turkish coffee makers and the like, generate foam in the heating and brewing processes, and if the heaters continue to work after generating the foam, the liquid foam overflows out of the container along with the liquid in the heaters. The existing Turkish coffee pot generally does not have an anti-overflow function, the overflow problem is more obvious, a user places water and coffee powder into a brewing cavity of the Turkish coffee pot to heat liquid in the brewing cavity, coffee generates foam when the coffee is heated to a certain degree, and the foam carries the coffee to overflow a container under the condition that no one is looking for the coffee pot. Thus, in use, the user is required to observe the brewing process and, when overflow occurs, remove the brewing container and switch off the heating source to avoid overflow of the heated liquid.

Chinese patent publication No. CN204445421U discloses a coffee machine with automatic brewing function, which can automatically brew, but when heated to a certain degree, the foam generated in the coffee may overflow, damage the coffee machine, and affect the service life of the coffee machine.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, an object of an aspect of the present invention is to provide a liquid heater to improve an anti-overflow effect when heating liquid.

In order to achieve the above object, the present invention provides a liquid heater, including:

the device comprises a machine body, a bearing, a positioning device and a control device, wherein the machine body comprises a base and a top cover connected with the base, and an installation space is defined between the base and the top cover;

the cup body is arranged on the base and is positioned in the mounting space;

the resistance detection device comprises a first electrode and a second electrode, the first electrode is arranged on the top cover, and the second electrode is arranged at the bottom of the cup body;

the circuit board is arranged on the machine body, the first electrode and the second electrode are respectively and electrically connected with the circuit board, liquid level rises or bubbles are generated after liquid in the cup body is heated, and the first electrode and the second electrode can be conducted and form a closed loop with the circuit board;

the heating device is electrically connected with the circuit board, and the circuit board can change the voltage loaded on the heating device according to the resistance value between the first electrode and the second electrode.

The liquid heater provided by the utility model has the advantages that the first electrode and the second electrode of the resistance detection device are respectively arranged above and at the bottom of the cup body, when the boiling liquid touches the first electrode above the cup body after heating, the first electrode and the second electrode can be conducted to form a closed loop with the circuit board, the voltage loaded on the heating device can be changed by detecting the change of the resistance value in the closed loop, the liquid in the cup body is prevented from overflowing, and the anti-overflow effect of the liquid heater is improved; the first electrode and the second electrode are respectively arranged above the cup body and at the bottom of the cup body, so that the accuracy of resistance detection can be guaranteed.

In some embodiments, one end of the first electrode is fixedly connected with the top cover, the other end of the first electrode is a free end and extends into the cup body, and the free end can be contacted with a liquid level rising due to heating or generated foam so as to conduct the first electrode and the second electrode. The first electrode is arranged above the highest water level of the liquid in normal use, so that the conduction of the first electrode and the second electrode can be detected in time.

In some embodiments, the first electrode is a retractable electrode comprising a sleeve fixedly connected to the top cover and an electrode body telescopically disposed in the sleeve, the electrode body being retractable to adjust the length of the first electrode extending into the cup. The first electrode is set as a telescopic electrode, the length of the first electrode extending into the cup body can be adjusted to adapt to cups with different capacities, and the application range is wider; meanwhile, the sleeve can protect the electrode, so that the electrode is kept clean, and the detection precision is improved.

In some embodiments, one end of the second electrode extends into the bottom of the cup body to contact the liquid in the cup body, and the other end of the second electrode is electrically connected with the circuit board. One end of the second electrode extends into the cup body, and the other end of the second electrode is arranged outside the cup body, so that a closed loop is conveniently formed. In addition, the second electrode is positioned at the bottom of the cup body and is always in contact with the liquid, so that a small section of the second electrode in the cup body is only needed.

In some embodiments, a base connector is arranged on the base, a cup body connector for matching connection with the base connector is arranged at the bottom of the cup body, and the base connector is connected with the cup body connector through a conductive contact. The cup body is electrically connected with the base through the base connector and the cup body connector, so that the installation is convenient, the connection is reliable, and the sensitivity is high.

In some embodiments, the first electrode is electrically connected to the circuit board by a first wire, the second electrode is connected to the cup connector by a second wire, and the base connector is electrically connected to the circuit board by a third wire. By utilizing the connection of the base connector and the cup body connector, a closed loop is formed among the first electrode, the second electrode and the circuit board, the connection is reliable, the wiring is clear, and the detection accuracy is high.

In some embodiments, the base includes a base body and a connecting arm extending upward from one side of the base body, the top cover is connected to the connecting arm and is disposed opposite to the base body, and the top cover and the base body are spaced apart by a certain distance to form the installation space. The base body type structure is adopted, the first electrode is arranged on the top cover and is arranged opposite to liquid in the cup body, and foam can be detected in time.

In some embodiments, the top cover is connected to the connecting arm through a lifting mechanism, and the lifting mechanism can drive the top cover to move up and down; the lifting mechanism is electrically connected with the circuit board. Through elevating system not only be convenient for getting of cup and put, also can adjust the height of first electrode in order to adapt to the cup of different capacities simultaneously, accommodation is wide.

In some embodiments, a chassis is arranged in the cup body, the chassis limits a containing cavity which is positioned at the upper part and used for containing liquid and a mounting cavity which is positioned at the lower part and used for mounting the heating device in the cup body, and the heating device is fixed at the bottom of the chassis. The liquid containing cavity and the heating device installation cavity are separated from the cup body through the chassis, so that the heating device can be protected when the heating device is heated, and the use safety of the liquid heater is improved.

In some embodiments, a chassis sealing ring for sealing the chassis is arranged between the chassis and the side wall of the cup body so as to ensure the sealing performance of the liquid accommodating cavity and prevent liquid from leaking.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic structural view of a liquid heater according to an embodiment of the present invention when the liquid heater is not heated;

fig. 2 is a schematic structural view of the liquid heater according to the embodiment of the present invention during heating;

fig. 3 is another schematic structural diagram of the liquid heater according to the embodiment of the present invention when the liquid heater is not heated;

FIG. 4 is a cross-sectional view of the first electrode of FIG. 3;

fig. 5 is a schematic structural view of the liquid heater according to the embodiment of the present invention after the top cover is lifted.

Reference numerals:

1-machine body, 11-base, 111-base, 112-connecting arm, 13-base connector and 12-top cover;

2-cup, 21-cup connector, 22-chassis, 201-containing cavity, 202-mounting cavity;

31-a first electrode, 311-a sleeve, 312-an electrode body, 313-a limiting mechanism and 32-a second electrode;

4-a circuit board; 5-a heating device;

61-first conductor, 62-second conductor, 63-third conductor;

7-a lifting mechanism; 8-a chassis sealing ring; 9-control panel.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1 to 5, an embodiment of the present invention provides a liquid heater, including:

the device comprises a machine body 1, a base plate 11 and a top cover 12, wherein the top cover 12 is connected with the base plate 11, and an installation space is defined between the base plate 11 and the top cover 12;

the cup body 2 is arranged on the base 11 and is positioned in the installation space;

a resistance detection device comprising a first electrode 31 and a second electrode 32, wherein the first electrode 31 is arranged on the top cover 12, and the second electrode 32 is arranged on the bottom of the cup body 2;

the circuit board 4 is arranged on the machine body 1, the first electrode 31 and the second electrode 32 are respectively and electrically connected with the circuit board 4, liquid level rises or foams are generated after liquid in the cup body 2 is heated, and the first electrode 31 and the second electrode 32 can be conducted and form a closed loop with the circuit board 4;

and the heating device 5 is electrically connected with the circuit board 4, and the circuit board 4 can change the voltage loaded on the heating device 5 according to the resistance value between the first electrode 31 and the second electrode 32, so that the liquid in the cup body 2 is prevented from overflowing.

The embodiment of the utility model provides a liquid heater is through setting up resistance detection device's first electrode 31 and second electrode 32 respectively in the top and the bottom of cup 2, after the heating, when the rising liquid level or the foam that produces touched the first electrode 31 that is located the cup 2 top, can switch on first electrode 31 and second electrode 32 and form closed loop with circuit board 4, change the voltage that loads on heating device 5 through detecting the change of resistance value in the closed loop, in order to cut off the power of heating device 5 in time or to reduce the heating power of heating device 5, prevent that the liquid in the cup 2 from spilling over, improve liquid heater's anti-overflow effect; the first electrode 31 and the second electrode 32 are respectively arranged above and at the bottom of the cup body 2, so that the accuracy of resistance detection can be ensured.

Specifically, one end of the first electrode 31 is fixedly connected to the top cap 12, and the other end of the first electrode 31 is a free end, which extends a certain distance in the direction toward the cup body 2 and extends into the cup body 2, and when heating, the free end can contact with the liquid level rising due to heating or the generated foam to conduct the first electrode 31 and the second electrode 32.

When the first electrode 31 and the second electrode 32 are not in contact with liquid (such as water), i.e. are in contact with air in the inner cavity of the cup body 2, the resistance value approaches zero or approaches infinity; when the first electrode 31 and the second electrode 32 are in contact with the liquid, the resistance value may be greatly changed.

In some embodiments, as shown in fig. 3 and 4, the first electrode 31 is a retractable electrode comprising a sleeve 311 fixedly attached to the top cover 12 and an electrode body 312 telescopically disposed in the sleeve 311. The first electrode 31 is arranged to be an electrode capable of extending or retracting relative to the sleeve 311, the length of the first electrode 31 extending into the cup body 2 can be adjusted to adapt to cup bodies 2 with different capacities, and the application range is wider; meanwhile, the sleeve 311 can protect the electrode, keep the electrode clean and improve the detection precision.

The outer side wall of the electrode body 312 is connected with the inner side wall of the sleeve 311 in a sliding fit manner, a slide rail (not shown) is arranged on the inner side wall of the sleeve 311, and a protrusion (not shown) matched with the slide rail is arranged on the outer side wall of the electrode body 312; the slide rail in the sleeve 311 and the protrusion on the electrode body 312 are matched with each other, so that the electrode body 312 can stably slide in the sleeve 311, and the telescopic function of the first electrode 31 is fully realized.

As shown in fig. 3, a stopper mechanism 313 is provided on the inner wall of the sleeve 311 at a position close to the outlet so as to prevent the electrode body 312 from being completely pulled out of the sleeve 311.

Further, the length of the free end of the first electrode 31 extending into the cup body 2 is determined according to the highest liquid level of the cup body 2, and when the liquid is not heated, the length of the free end extending into the cup body 2 is a certain distance away from the highest liquid level of the liquid; when the liquid level rises or foams are generated after the liquid is heated, the free end can be contacted with the liquid level rising or the foams generated due to heating, at the moment, the first electrode 31 and the second electrode 32 are conducted by taking the liquid or the foams as conductors, so that a closed loop is formed among the first electrode 31, the second electrode 32 and the circuit board 4, a resistance signal is generated on the closed loop, and after the circuit board 4 receives the resistance signal, the voltage loaded on the heating device 5 can be changed according to the resistance value of the resistance, the power supply of the heating device 5 is cut off or the heating power of the heating device 5 is reduced in time, and the liquid in the cup body 2 is prevented from overflowing.

In some embodiments, as shown in fig. 1 and 2, one end of the second electrode 32 extends into the bottom of the cup 2 to contact the liquid in the cup 2, and the other end of the second electrode 32 is electrically connected to the circuit board 4. One end of the second electrode 32 extends into the cup body 2, and the other end is located outside the cup body 2 and electrically connected to the circuit board 4, so as to form a closed loop. Since the second electrode 32 is located at the bottom of the cup 2 and is always in contact with the liquid in the cup 2, the length of the portion thereof located in the cup 2 can be set small.

Preferably, the first electrode 31 and the second electrode 32 are both food grade stainless steel electrodes to ensure the safety of liquid drinking.

In some embodiments, the first electrode 31 and the second electrode 32 may be electrode probes, such as metal rods, when the liquid is heated to a certain degree, the first electrode 31 is in contact with the liquid, the first electrode 31 and the second electrode 32 are conducted by the liquid, and the circuit formed by the circuit board 4, the first electrode 31 and the second electrode 32 is also conducted, so that the resistance between the first electrode 31 and the second electrode 32 can be detected, and the heating device 5 is switched on and off according to the detected resistance value, so as to implement the anti-overflow function.

In some embodiments, as shown in fig. 1 and 2, the base 11 is provided with a base connector 13, the bottom of the cup body 2 is provided with a cup body connector 21 for mating connection with the base connector 13, and the base connector 13 and the cup body connector 21 are connected by conductive contacts.

Specifically, the first electrode 31 is electrically connected to the circuit board 4 through a first wire 61, the second electrode 32 is connected to the cup connector 21 through a second wire 62, the cup connector 21 is connected to the cradle connector 13 through a conductive contact, and the cradle connector 13 is electrically connected to the circuit board 4 through a third wire 63.

Because the base connector 13 is electrically connected with the circuit board 4, place the cup 2 on the base 11, can make base connector 13 and cup connector 21 pass through conductive contact and be connected, because first electrode 31 is electrically connected through first wire 61 with circuit board 4, be connected through second wire 62 between second electrode 32 and the cup connector 21, when first electrode 31 and liquid contact, utilize the contact of two connectors, can make and form closed circuit between circuit board 4 and first electrode 31, the second electrode 32, make full use of current conductive element forms closed circuit and realizes resistance detection, and walk the line clearly, and is rationally distributed. In addition, the base connector 13 is convenient and reliable to contact with the cup body connector 21, the reliability of resistance detection can be guaranteed, and the liquid anti-overflow effect is improved.

In some embodiments, as shown in fig. 1 and 2, the base 11 includes a base body 111 and a connecting arm 112 extending upward from one side of the base body 111, the top cover 12 is connected to the connecting arm 112 and is disposed opposite to the base body 111, and the top cover 12 and the base body 111 are spaced apart from each other by a predetermined distance to form an installation space for placing the cup body 2.

In this embodiment, the top cap 12 is arranged opposite to the cup body 2 through the connecting arm 112, so that the accuracy of resistance detection can be ensured, and meanwhile, the accuracy of liquid level when liquid is added into the cup body 2 can be ensured.

In some embodiments, the top cover 12 and the base 11 may be a split structure, and the top cover 12 is fixed to one end of the top of the base 11 through a connecting member, so that the assembly and disassembly are convenient, and the replacement and cleaning are easy. In other embodiments, the top cover 12 and the base 11 may also be an integrated structure, one end of the top of the connecting arm 112 extends in a direction opposite to the top of the base 111 to form the top cover 12, and an installation space for placing the cup body 2 is defined between the top cover 12 and the base 111.

In some embodiments, as shown in fig. 5, the top cover 12 is connected to the connecting arm 112 through the lifting mechanism 7, and the lifting mechanism 7 is disposed in the connecting arm 112 and can drive the top cover 12 to move up and down to adapt to cups 2 with different sizes. In addition, the lifting mechanism 7 drives the top cover 12 to lift, so that the height of the first electrode 31 can be adjusted, and the length of the first electrode 31 extending into the cup body 2 can be adjusted. The lifting mechanism is electrically connected with the circuit board 4, and can realize automatic lifting.

In some embodiments, the lifting mechanism 7 includes a lifting rod and a driving motor connected to the lifting rod, and the driving motor is electrically connected to the circuit board 4 and can drive the lifting rod to move up and down, so as to drive the top cover 12 connected to the lifting rod to move up and down, adjust the height of the top cover 12, and further adjust the length of the first electrode 31 connected to the top cover 12 extending into the cup body 2.

In some embodiments, a bottom plate 22 is disposed in the cup body 2, the bottom plate 22 defines a containing cavity 201 for containing liquid at the upper part and a mounting cavity 202 for mounting the heating device 5 at the lower part in the cup body 2, the containing cavity 201 is disposed above the bottom plate 22, the mounting cavity 201 is disposed below the bottom plate 22, the heating device 5 is fixed at the bottom of the bottom plate 22, and the bottom of the mounting cavity 202 is recessed to form a cup body connector 21 for connecting with the base 11. Be provided with independent installation cavity 202 and with heating device 5 fixed mounting in chassis 22, heating device 5 hugs closely with the bottom that holds cavity 201, is convenient for rapid heating intensification.

Further, a chassis sealing ring 8 for sealing the chassis 22 is arranged between the chassis 22 and the side wall of the cup body 2 to ensure the sealing performance of the accommodating cavity 201.

In some embodiments, as shown in fig. 1 and 2, the liquid heater further comprises a control board 9 for controlling the heating process of the liquid, the control board 9 being electrically connected to the circuit board 4. The control panel 9 can be a control panel or a control knob, and keys and indicator lights related to heating are arranged on the control panel, so that a user can conveniently adjust parameters such as starting and stopping of the heating device 5, heating power and the like, and user experience is improved. In this embodiment, the control panel 9 is a control knob, which is disposed on one side of the base 11 and is connected to the circuit board 4 through a wire.

The working principle of the utility model is as follows:

when the liquid heater is electrified to work, the circuit board 4 controls the heating device 5 to heat the liquid in the cup body 2. In the initial stage of heating, since the first electrode 31 is not in contact with the liquid, the first electrode 31 and the second electrode 32 are not conducted, and thus the resistance value detected by the circuit board 4 is zero or infinite; when the cup body 2 is heated to a certain degree, the liquid in the cup body 2 expands or foams with the rise of the temperature in the cup body 2, the liquid rising due to boiling or the foams with the first electrode 31 contact, the two electrodes of the first electrode 31 and the second electrode 32 are conducted, the circuit board 4 is sequentially connected with the first electrode 31 and the second electrode 32 through the first lead 61, the third lead 63, the base connector 13, the cup body connector 21 and the second lead 62, so that a closed loop is formed between the circuit board 4 and the first electrode 31 and between the circuit board 4 and the second electrode 32, the resistance value between the circuit board 31 and the second electrode 32 is detected, the voltage loaded on the heating device 5 can be timely changed when the liquid or the foams continuously rise and are about to overflow, the power of the heating device 5 is reduced, and the liquid overflow caused by the continuous rise of the liquid or the foams is avoided.

The liquid of splendid attire can be water in the cup 2, also can be other liquid that contain water such as coffee, milk, beverage, tea, health preserving hot water, the utility model discloses do not do the restriction to this, preferably, the utility model discloses the more liquid of production foam such as specially adapted coffee.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims

1. A liquid heater, comprising:

the cup body is arranged on the base and is positioned in the mounting space;

a heating device electrically connected to the circuit board, the circuit board being capable of varying a voltage applied to the heating device according to a resistance value between the first electrode and the second electrode.

2. The liquid heater of claim 1, wherein one end of the first electrode is fixedly connected to the top cap, and the other end of the first electrode is a free end and extends into the cup body, and the free end can contact with a liquid level rising due to heating or foam generated to conduct the first electrode and the second electrode.

3. The liquid heater of claim 1, wherein the first electrode is a retractable electrode comprising a sleeve fixedly attached to the top cover and an electrode body telescopically disposed in the sleeve, the electrode body being retractable to adjust a length of the first electrode extending into the cup.

4. The liquid heater of claim 1, wherein one end of the second electrode extends into the bottom of the cup for contacting the liquid in the cup, and the other end of the second electrode is electrically connected to the circuit board.

5. The liquid heater of claim 1, wherein the base has a base connector thereon, the bottom of the cup has a cup connector thereon for mating connection with the base connector, and the base connector is connected to the cup connector via a conductive contact.

6. The liquid heater of claim 5, wherein the first electrode is electrically connected to the circuit board by a first lead, the second electrode is connected to the cup connector by a second lead, and the base connector is electrically connected to the circuit board by a third lead.

7. The liquid heater of claim 1, wherein the base comprises a base body and a connecting arm extending upward from one side of the base body, the top cover is connected to the connecting arm and disposed opposite to the base body, and the top cover and the base body are spaced apart from each other to form the installation space.

8. The liquid heater of claim 7, wherein the top cover is connected to the connecting arm by a lifting mechanism, the lifting mechanism being capable of moving the top cover up and down; the lifting mechanism is electrically connected with the circuit board.

9. The liquid heater of claim 1, wherein a bottom plate is arranged in the cup body, the bottom plate defines a containing cavity positioned at the upper part in the cup body for containing liquid and a mounting cavity positioned at the lower part for mounting the heating device, and the heating device is fixed at the bottom of the bottom plate.

10. The liquid heater of claim 9, wherein a seal is disposed between the bottom plate and the sidewall of the cup.