CN216899115U - Anti-overflow detection circuitry and non-isolation broken wall machine - Google Patents
Anti-overflow detection circuitry and non-isolation broken wall machine Download PDFInfo
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- CN216899115U CN216899115U CN202220270516.8U CN202220270516U CN216899115U CN 216899115 U CN216899115 U CN 216899115U CN 202220270516 U CN202220270516 U CN 202220270516U CN 216899115 U CN216899115 U CN 216899115U
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Abstract
The utility model discloses an anti-overflow detection circuit and a non-isolated wall breaking machine. The overflow prevention detection circuit is suitable for the non-isolated main control circuit and comprises a water level detection unit, a first induction surface and a second induction surface, wherein the water level detection unit is used for detecting the water level and outputting an induction signal when the water level reaches a preset position; the water level detection unit is connected with the first induction surface, and the second induction surface can be connected with the non-isolated main control circuit; the first induction surface and the second induction surface form an induction capacitor used for outputting a heating stop signal according to the induction signal. The utility model has the following beneficial effects: even the master control circuit is a non-isolation scheme, electric shock accidents can not happen, and the circuit is simple in structure and low in cost.
Description
Technical Field
The utility model relates to the field of anti-overflow detection, in particular to an anti-overflow detection circuit and a non-isolated wall breaking machine.
Background
In prior art, the anti-overflow detection circuitry of broken wall machine need with liquid direct contact to detect the anti-overflow signal, if use non-isolation scheme, can lead to the user to electrocute, consequently, need use the isolation scheme to the master control circuit of broken wall machine, and the cost height of isolation scheme.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an anti-overflow detection circuit and a non-isolated wall breaking machine aiming at least one defect in the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows: an anti-overflow detection circuit is constructed and is suitable for a non-isolated main control circuit, and comprises a water level detection unit, a first induction surface and a second induction surface, wherein the water level detection unit is used for detecting the water level and outputting an induction signal when the water level reaches a preset position;
the water level detection unit is connected with the first sensing surface, and the second sensing surface can be connected with the non-isolated main control circuit;
and the first induction surface and the second induction surface form an induction capacitor for outputting a heating stop signal according to the induction signal.
Preferably, in the anti-overflow detection circuit of the present invention, the anti-overflow detection circuit further comprises a filtering unit, which includes a seventh capacitor C7; the first sensing surface is connected to ground via the seventh capacitor C7.
Preferably, in the anti-overflow detection circuit of the present invention, the anti-overflow detection circuit further includes a first resistor R1, a seventh resistor R7, and a twelfth capacitor C12;
the first sensing surface is connected to the water level detection unit through the first resistor R1;
the second sensing surface is grounded through the twelfth capacitor C12 and is connected to the non-isolated master control circuit through the seventh resistor R7.
Preferably, in the anti-overflow detection circuit of the present invention, the first sensing surface and the second sensing surface are parallel to each other.
Preferably, in the overflow prevention detection circuit of the present invention, the first sensing surface and the second sensing surface are tightly attached to each other through an insulating material.
Preferably, in the overflow prevention detection circuit of the present invention, the first sensing surface and the second sensing surface are metal planes.
The utility model also discloses a non-isolated wall breaking machine which comprises a non-isolated main control circuit and any one of the anti-overflow detection circuits.
Preferably, in the non-isolated wall breaking machine of the present invention, the non-isolated main control circuit includes a main control chip U1 and a control panel;
and IO ports in the main control chip U1 are respectively connected with the input end of the control panel and the output end of the second induction surface in a one-to-one correspondence manner.
Preferably, in the non-isolated wall breaking machine of the present invention, the water level detection unit is a cup cover of the wall breaking machine, and the cup cover is made of a conductive material.
Preferably, in the non-isolated wall breaking machine, the cup cover is made of steel.
The utility model has the following beneficial effects: the water level detection unit is used for detecting the water level and outputting an overflow sensing signal when the water level reaches a preset position, the sensing signal is transmitted to the sensing unit, the sensing unit couples the sensing signal in the sensing unit through a space capacitor sensing method, the coupled sensing signal is transmitted to the MCU to process a capacitor touch signal, if the touch sensing quantity reaches a certain threshold value, the MCU generates a signal for stopping heating, the detection unit and the main control circuit are isolated in the detection process, and therefore the main control circuit is a non-isolated scheme and cannot generate electric shock accidents.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a first embodiment of an anti-overflow detection circuit provided by the present invention;
FIG. 2 is a schematic diagram of a second embodiment of an anti-overflow detection circuit provided by the present invention;
FIG. 3 is a structural diagram of a first sensing surface and a second sensing surface of the anti-overflow detection circuit provided by the utility model;
fig. 4 is a schematic diagram of a non-isolated main control circuit in the non-isolated wall breaking machine provided by the utility model.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention constructs an anti-overflow detection circuit, which is suitable for a non-isolated master control circuit, and includes a water level detection unit for detecting a water level and outputting a sensing signal when the water level reaches a preset position, a first sensing surface 10, and a second sensing surface 20;
the water level detection unit is connected with the first induction surface 10, and the second induction surface 20 can be connected with a non-isolated main control circuit;
the first sensing surface 10 and the second sensing surface 20 constitute an induction capacitor for outputting a stop heating signal according to the induction signal.
The working principle of the anti-overflow detection circuit is as follows: when anti-overflow detection circuitry used with the cooperation of broken wall machine, induction capacitance made water level detection unit and the master control circuit realization of broken wall machine keep apart, and then made master control circuit be the non-isolation scheme also can not take place the electric shock accident. When the liquid level in the cup body does not contact the preset position, the capacitance induction quantity of the induction capacitor is basically kept unchanged. When the liquid water level in the cup body of broken wall machine contacted preset position, liquid contacted the conducting material in the water level detecting unit promptly, this conducting material was connected with first response face 10, and water level detecting unit forms sensing signal promptly to transmit the first response face 10 in the response electric capacity, and then change the response capacitance value of second response face 20. In the induction signal induction process, the induction variable quantity of the induction capacitor reaches a certain induction threshold value, namely the heating stop signal is obtained, the water level can be known to reach the preset position, and then the wall breaking machine stops heating.
As shown in fig. 2, the anti-overflow detection circuit further includes a filtering unit 40 including a seventh capacitor C7, and the first sensing surface is connected to the ground through a seventh capacitor C7.
As shown in fig. 2, the anti-overflow detection circuit further includes a first resistor R1, a seventh resistor R7, and a twelfth capacitor C12;
the first sensing surface 10 is connected to the water level detecting unit through a first resistor R1, and the second sensing surface 20 is grounded through a twelfth capacitor C12 and connected to the non-isolated main control circuit through a seventh resistor R7.
The first resistor R1 and the seventh capacitor C7 form an RC filter circuit, and further filter the sensing signal to reduce noise interference. Similarly, the seventh resistor R7 and the twelfth capacitor C12 form an RC filter circuit for filtering noise of the stop heating signal.
Optionally, the first sensing surface 10 and the second sensing surface 20 are parallel to each other, so that the sensing effect between the first sensing surface 10 and the second sensing surface 20 can be enhanced.
As shown in fig. 3, the first sensing surface 10 and the second sensing surface 20 are closely attached through the insulating material 30 to ensure that the relative area and distance between the first sensing surface 10 and the second sensing surface 20 are kept constant, thereby ensuring the consistency of the sensing efficiency of the first sensing surface 10 and the second sensing surface 20.
Optionally, the first sensing surface 10 and the second sensing surface 20 are metal planes. Further, the first sensing surface 10 and the second sensing surface 20 may be copper sheets.
The utility model also constructs a non-isolated wall breaking machine which comprises a non-isolated main control circuit and any one of the anti-overflow detection circuits.
As shown in fig. 4, the non-isolated master control circuit includes a master control chip U1 and a control panel (not shown in fig. 4); the model of the main control chip U1 may be APT3F 101.
The IO ports in the main control chip U1 are connected to the input end of the control panel and the output end of the second sensing surface 20 in a one-to-one correspondence manner.
In some embodiments, the water level detection unit is a cup cover of the wall breaking machine, and the cup cover is made of a conductive material. Because the liquid and the cup cover are both conductors, when the liquid contacts the cup cover, the cup cover can form an induction signal which is transmitted to the first induction surface 10. Further, the cup cover is made of steel.
The utility model has the following beneficial effects: the water level detection unit is used for detecting the water level and outputting an overflow sensing signal when the water level reaches a preset position, the sensing signal is transmitted to the sensing unit, the sensing unit couples the sensing signal in the sensing unit through a space capacitor sensing method, the coupled sensing signal is transmitted to the MCU to process a capacitor touch signal, if the touch sensing quantity reaches a certain threshold value, the MCU generates a signal for stopping heating, the detection unit and the main control circuit are isolated in the detection process, and therefore the main control circuit is a non-isolated scheme and cannot generate electric shock accidents.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An anti-overflow detection circuit is characterized by being suitable for a non-isolated main control circuit, and comprising a water level detection unit, a first induction surface and a second induction surface, wherein the water level detection unit is used for detecting the water level and outputting an induction signal when the water level reaches a preset position;
the water level detection unit is connected with the first sensing surface, and the second sensing surface can be connected with the non-isolated main control circuit;
and the first induction surface and the second induction surface form an induction capacitor for outputting a heating stop signal according to the induction signal.
2. The overfill prevention detection circuit of claim 1, further comprising a filtering unit comprising a seventh capacitor C7; the first sensing surface is connected to ground via the seventh capacitor C7.
3. The overflow prevention detection circuit of claim 2 further comprising a first resistor R1, a seventh resistor R7, and a twelfth capacitor C12;
the first sensing surface is connected to the water level detection unit through the first resistor R1;
the second sensing surface is grounded through the twelfth capacitor C12 and is connected to the non-isolated master control circuit through the seventh resistor R7.
4. The overfill prevention detection circuit of claim 3, wherein said first sensing surface and said second sensing surface are parallel to each other.
5. The overfill prevention detection circuit of claim 4, wherein said first sensing surface and said second sensing surface are attached together by an insulating material.
6. The overfill prevention detection circuit of claim 5, wherein said first sensing surface and said second sensing surface are metal planes.
7. A non-isolated wall breaking machine, which is characterized by comprising a non-isolated main control circuit and an anti-overflow detection circuit according to any one of claims 1 to 6.
8. The non-isolated wall-breaking machine according to claim 7, wherein the non-isolated master control circuit comprises a master control chip U1 and a control panel;
and IO ports in the main control chip U1 are respectively connected with the input end of the control panel and the output end of the second induction surface in a one-to-one correspondence manner.
9. The non-isolated wall breaking machine according to claim 8, wherein the water level detection unit is a cup cover of the wall breaking machine, and the cup cover is made of a conductive material.
10. The non-isolated wall breaking machine according to claim 9, wherein the cup lid is made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220270516.8U CN216899115U (en) | 2022-02-10 | 2022-02-10 | Anti-overflow detection circuitry and non-isolation broken wall machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220270516.8U CN216899115U (en) | 2022-02-10 | 2022-02-10 | Anti-overflow detection circuitry and non-isolation broken wall machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216899115U true CN216899115U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220270516.8U Active CN216899115U (en) | 2022-02-10 | 2022-02-10 | Anti-overflow detection circuitry and non-isolation broken wall machine |
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| Country | Link |
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| CN (1) | CN216899115U (en) |
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- 2022-02-10 CN CN202220270516.8U patent/CN216899115U/en active Active
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