CN214631649U

CN214631649U - Automatic failure identification device for water level detection circuit of hot water kettle and hot water kettle

Info

Publication number: CN214631649U
Application number: CN202120145515.6U
Authority: CN
Inventors: 方周荣; 张有富
Original assignee: XIAMEN YUEYI ELECTRONIC TECHNOLOGY CO LTD
Current assignee: XIAMEN YUEYI ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-09
Anticipated expiration: 2031-01-20

Abstract

The utility model relates to a detect water level circuit failure automatic identification equipment field, concretely relates to electric kettle detects water level circuit failure automatic identification equipment and thermos, wherein, electric kettle detects water level circuit failure automatic identification equipment and includes thermos body and thermos base, the thermos body is equipped with coupler seat of honour, level sensor, and the thermos base is equipped with coupler seat of honour, examines water level circuit and singlechip, level sensor's output loops through coupler seat of honour, coupler seat of honour electricity and connects and examine water level circuit detection port, level sensor's output still connects the kettle wall of thermos body through a resistance unit, examines water level circuit and singlechip and connects. The utility model discloses detect voltage and be greater than predetermined fixed voltage value when examining the water level circuit, just can judge that coupler contact failure or because other reasons lead to examining the water level return circuit and open circuit, then stop adding water to avoid adding water and come out fully.

Description

Automatic failure identification device for water level detection circuit of hot water kettle and hot water kettle

Technical Field

The utility model relates to a detect water level circuit failure automatic identification equipment field, especially relate to a thermos detects water level circuit failure automatic identification equipment and thermos.

Background

Water level sensor is all installed to present thermos, the water level signal of thermos is through the coupler contact conduction for the water level circuit of examining on the automatically controlled board, but the coupler can have the condition of contact failure or contact electrode oxidation occasionally in the in-service use, if the automatically controlled board of thermos can't detect that the thermos lacks water or the coupler contact failure, the water level inefficacy will appear examining, when the people leaves, the thermos can add water always and spill over, waste water resource, and influence use experience, the water infiltration that spills over is among the circuit of heating, cause the circuit short circuit easily, equipment failure, the fire incident takes place, there is very big potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model provides a thermos detects water level circuit failure automatic identification equipment can detect when not adding water or contact failure suddenly at the in-process coupler that adds water, in time stops the procedure of adding water to avoid the mistake to add water too long time overflow and come out.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a thermos detects water level circuit failure automatic identification equipment, includes thermos body and thermos base, the thermos body is equipped with coupler seat of honour, level sensor, and the thermos base is equipped with coupler seat of honour, examines water level circuit and singlechip, level sensor's output loops through coupler seat of honour, coupler seat of honour electricity and is connected and examines water level circuit detection port, level sensor's output still connects the kettle wall of thermos body through a resistance unit, examines water level circuit and singlechip and connects.

Wherein the water level sensor is implemented by using a conductive probe.

The water level sensor comprises a first conductive probe and a second conductive probe, wherein the first conductive probe is located at the bottom end of the thermos body and used for detecting a low water level, and the second conductive probe is located at the upper end of the side wall of the thermos body and used for detecting a high water level.

The first conductive probe is insulated from the inner wall of the thermos body through an insulating substance and is connected with the side wall of the thermos body through a first resistance unit; the second conductive probe is insulated from the inner wall of the thermos through an insulating substance, and the second conductive probe and the second resistance unit are connected with the side wall of the thermos body.

Wherein the first conductive probe and the second conductive probe are both stainless steel probes.

The first resistance unit and the second resistance unit respectively comprise a voltage stabilizing diode and a resistor which are connected in parallel.

Wherein, the first resistance and the second resistance are both 1 +/-0.3M omega.

Wherein the insulating substance is insulating silica gel.

Wherein, the thermos body is also provided with a temperature probe which is connected with the single chip machine through the upper coupler seat and the lower coupler seat.

The first conductive probe and the temperature measuring probe are of an integrated structure.

The utility model also discloses a thermos is equipped with foretell thermos and detects the automatic identification equipment of water level circuit inefficacy.

The utility model has the advantages that:

the utility model discloses an in the thermos water level sensor's output is through a resistance unit ground connection, detects voltage when examining the water level circuit and is greater than predetermined fixed voltage value, just can judge that coupler contact failure or examine the water level return circuit and open circuit, stops to add water to avoid adding water and fill out, lead to wasting water, and improve security and reliability, circuit structure is simple, easily realizes, and is with low costs.

Drawings

FIG. 1 is a schematic structural diagram of an automatic identification device according to the present embodiment;

FIG. 2 is a schematic circuit diagram of the identification device in the embodiment when the hot water kettle body is full of water;

fig. 3 is a schematic circuit diagram of the identification device in the embodiment when the hot water bottle body is in the non-water state.

In the figure: 1. the water heater comprises a water heater body, 2 a water heater base, 3 a first conductive probe, 4 a second conductive probe, 5 a coupler upper seat, 6 a coupler lower seat, 7 a temperature measuring probe, 8 an electric control board, 9 a single chip microcomputer, 10 a water level detection circuit, 11 a low water level detection port and 12 a high water level detection port.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Referring to fig. 1-3 and showing, as the preferred embodiment of the utility model discloses a thermos detects water level circuit failure automatic identification equipment, including thermos body 1 and thermos base 2, thermos body 1 is equipped with coupler seat of honour 5, level sensor, and thermos base 2 is equipped with coupler seat of honour 6, examines water level circuit 10 and singlechip 9, level sensor's output loops through coupler seat of honour 5, coupler seat of honour 6 electricity connection and examines water level circuit 10's detection port, level sensor's output still connects the kettle wall of thermos body 1 through a resistance unit, examines water level circuit 10 and singlechip 9 and connects. The water level detecting circuit 10 includes a low water level detecting port 11 and a high water level detecting port 12, and is a water level detecting circuit of a conventional hot water kettle using a probe to detect water level, which can be easily implemented by those skilled in the art and will not be described in detail.

Preferably, the water level sensor is implemented by using a conductive probe, and has a simple structure, easy implementation and low cost, but the implementation is not limited thereto, and in other embodiments, the water level sensor can also be implemented by using other existing water level sensors.

Wherein, level sensor is including being located 1 bottom of thermos body is used for detecting the first conductive probe 3 of low water level and being located 1 lateral wall upper end of thermos is used for detecting the second conductive probe 4 of high water level, first conductive probe 3 detects the low water level condition, prevents that the thermos from burning futilely, second conductive probe 4 prevents that the thermos from adding water and overflowing through detecting the high water level condition.

The first conductive probe 3 is insulated from the inner wall of the thermos body 1 through an insulating substance, and is connected with the side wall of the thermos body 1 through a first resistance unit; the second conductive probe 4 is insulated from the inner wall of the thermos body 1 through an insulating substance, and the second conductive probe 4 and the second resistance unit are connected with the side wall of the thermos body 1.

Specifically, the hot water kettle body 1 is coupled and grounded through the coupler upper seat 5 and the coupler lower seat 6, specifically, the coupler upper seat 5 and the coupler lower seat 6 are provided with an electrode D1, an electrode D2, an electrode D3 and a grounding electrode which are in one-to-one correspondence, wherein the electrode D1 is correspondingly and electrically connected with the first conductive probe 3, and the electrode D2 is correspondingly and electrically connected with the second conductive probe 4. When the water body is higher than the low water level, the water body is in contact with the first conductive probe 3, so that a water equivalent resistor (namely a resistor R8 in fig. 2) in the hot water kettle body 1 is conducted with the first conductive probe 3 to form a loop, corresponding loop information is fed back to the single chip microcomputer 9 through the water level detection circuit 10, the single chip microcomputer 9 carries out analysis and judgment, a corresponding instruction is executed, and if no water exists, the single chip microcomputer 9 executes power-off work; when the water body is higher than the high water level, the water body contacts with the second conductive probe 4, so that the water equivalent resistance (namely, the resistance R7 in fig. 2) in the hot water kettle body 1 is conducted with the second conductive probe 4 to form a loop, corresponding loop information is fed back to the singlechip 9 through the water level detection circuit 10, the singlechip 9 carries out analysis and judgment, and if the water adding amount exceeds the water level, the singlechip 9 executes a water adding stopping command.

Preferably, the first conductive probe 3 and the second conductive probe 4 are stainless steel probes, which ensure that the probes are not easily rusted due to long-term contact with a water body, and the service life is prolonged, but not limited thereto, and in other embodiments, the first conductive probe 3 and the second conductive probe 4 may also be made of other conductive materials, such as copper, aluminum, and the like.

The kettle wall of the hot water kettle body 1 is grounded through the grounding electrode, so that a water level detection circuit forms a complete closed loop.

Preferably, the first resistance unit and the second resistance unit both include a zener diode and a resistor connected in parallel, and the zener diode can play a role in preventing series current.

Specifically, the first resistance unit includes a resistor R5 and a zener diode D5, and the second resistance unit includes a resistor R6 and a zener diode D6, in other embodiments, the first resistance unit and the second resistance unit may be implemented by other circuit structures, for example, only by resistors, as long as the voltage division function is achieved.

Preferably, in this embodiment, the resistor R5 and the resistor R6 are both 1M Ω, and resistors with larger resistance values are adopted, so as to reduce energy consumption and ensure detection sensitivity, but not limited thereto, the resistance values of the resistor R5 and the resistor R6 may be maintained at 0.7M Ω to 1.3M Ω.

Preferably, the insulating substance is insulating silica gel, the main component of the insulating silica gel is silicon dioxide, the insulating silica gel is stable in chemical property, safe and non-toxic, and of course, other insulating substances can be used, such as insulating plastic, as long as the insulating substance is safe and stable.

The thermos body 1 is further provided with a temperature measuring probe 7, the temperature measuring probe 7 is connected with the single chip microcomputer 9 through the coupler upper seat 5 and the coupler lower seat 6, and preferably, a thermistor is mounted inside the temperature measuring probe 7 to guarantee temperature measuring sensitivity and stability. The upper coupler seat 5 and the lower coupler seat 6 are provided with electrodes D3 corresponding to the temperature measuring probe 7.

Preferably, the first conductive probe 3 and the temperature measuring probe 7 are of an integrated structure. The first conductive probe 3 can be reasonably protected while the space is saved, and certainly, in some embodiments, the first conductive probe 3 and the temperature measuring probe 7 can be separately and independently installed, and only occupy larger space and are not brief enough.

Preferably, the automatic identification device for detecting the water level failure of the hot water kettle is arranged in the embodiment and is applied to the hot water kettle, and of course, the automatic identification device can also be applied to other hot water equipment, and only the installation structural form is different, and the realization principle is the same.

The working principle of the invention is as follows:

as can be seen from fig. 2-3, when there is no water in the hot water kettle body 1 and the electrodes D1 and D2 are in good contact, that is, the water detection circuit is not broken, the voltage of 5V passes through the voltage division circuit formed by R1 and R5, the voltage value at the junction of R1 and R2 is within a certain range, and then reaches the low water level detection port through the serially connected resistor R2; in the high water level detection loop, 5V voltage passes through a voltage division circuit formed by R3 and R6, the voltage value at the junction of R3 and R4 is in a certain range, and then the voltage value reaches a high water level detection port through a resistor R4 connected in series: the measured voltage value is in a certain range and is converted into a hexadecimal numerical value through AD (analog-to-digital), the embodiment presets that when the water kettle body 1 is not filled with water, the normal numerical value of the AD value detected by the low-water-level detection loop at the junction of the resistor R1 and the resistor R2 is lower than 210, but is higher than 120, the water shortage in the water kettle body 1 is judged, and the singlechip 9 executes power-off work to prevent the water kettle from being dried; if the AD value is more than 210, the water detection loop is judged to be open-circuited to display an E6 fault code, water adding is stopped, the situation that when the coupler is in poor contact or the contact electrode is oxidized is ensured, the single chip microcomputer 9 cannot misjudge that the hot water kettle body 1 is not filled with water, water is added until the water is filled, if the AD value is less than 120, the situation that water is filled in the hot water kettle body 1 is judged, and heating work can be carried out.

The normal AD value detected by the high water level detection loop at the junction of the resistor R3 and the resistor R4 is lower than 210, but is larger than 120, the water shortage in the hot water kettle body 1 is judged, if the AD value is larger than 210, the open circuit of the water detection loop is judged to display an E6 fault code, the water adding is stopped, the situation that when the coupler is in poor contact or the contact electrode is oxidized is ensured, the singlechip 9 cannot mistakenly judge that the hot water kettle body 1 is not full of water, and the water adding is always carried out until the water is full, and if the AD value is smaller than 120, the water adding is stopped when the water is in the hot water kettle body 1.

The utility model discloses be exactly in the thermos water level sensor's output is through a resistance unit ground connection, detects voltage when examining the water level circuit and is greater than predetermined fixed voltage value, just can judge that coupler contact failure or examine the water level return circuit and open circuit, stops to add water to avoid adding water and come out fully, and circuit structure is simple, easily realizes, and is with low costs.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a thermos detects water level circuit failure automatic identification equipment, includes thermos body and thermos base, its characterized in that: the kettle is characterized in that the kettle body is provided with an upper coupler seat and a water level sensor, the kettle base is provided with a lower coupler seat, a water level detection circuit and a single chip microcomputer, the output end of the water level sensor is electrically connected with a detection port of the water level detection circuit sequentially through the upper coupler seat and the lower coupler seat, the output end of the water level sensor is connected with the kettle wall of the kettle body through a resistance unit, and the water level detection circuit is connected with the single chip microcomputer.

2. The automatic recognition device for detecting the water level circuit failure of the hot water kettle according to claim 1, characterized in that: the water level sensor is implemented by adopting a conductive probe.

3. The automatic recognition device for detecting the water level circuit failure of the hot water kettle according to claim 2, characterized in that: the water level sensor comprises a first conductive probe positioned at the bottom end of the thermos body and used for detecting a low water level and a second conductive probe positioned at the upper end of the side wall of the thermos body and used for detecting a high water level.

4. The device for automatically recognizing the water level detection circuit failure of the hot water kettle as claimed in claim 3, wherein: the first conductive probe is insulated from the inner wall of the thermos body through an insulating substance and is connected with the side wall of the thermos body through a first resistance unit; the second conductive probe is insulated from the inner wall of the thermos through an insulating substance and is connected with the side wall of the thermos body through a second resistance unit.

5. The device for automatically identifying the failure of the water level detection circuit of the hot water kettle according to claim 4, wherein: the first conductive probe and the second conductive probe are both stainless steel probes.

6. The device for automatically identifying the failure of the water level detection circuit of the hot water kettle according to claim 4, wherein: the first resistance unit and the second resistance unit respectively comprise a voltage stabilizing diode and a resistor which are connected in parallel.

7. The device for automatically recognizing the water level detection circuit failure of the hot water kettle as claimed in claim 6, wherein: the resistance values of the first resistance unit and the second resistance unit are both 1 +/-0.3M omega.

8. The device for automatically identifying the failure of the water level detection circuit of the hot water kettle according to claim 4, wherein: the insulating substance is insulating silica gel.

9. The device for automatically recognizing the water level detection circuit failure of the hot water kettle as claimed in claim 3, wherein: the thermos body is also provided with a temperature measuring probe which is connected with a single chip microcomputer through an upper coupler seat and a lower coupler seat, and the first conductive probe and the temperature measuring probe are of an integrated structure.

10. A hot water kettle, characterized in that: an automatic identification device for detecting the failure of a water level circuit of a hot water kettle according to any one of claims 1-9.