CN212281006U - Anti-overflow reliable commercial food preparation machine - Google Patents
Anti-overflow reliable commercial food preparation machine Download PDFInfo
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- CN212281006U CN212281006U CN202020236639.0U CN202020236639U CN212281006U CN 212281006 U CN212281006 U CN 212281006U CN 202020236639 U CN202020236639 U CN 202020236639U CN 212281006 U CN212281006 U CN 212281006U
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Abstract
The utility model discloses a reliable commercial food preparation machine of anti-overflow belongs to the food processing equipment field, the problem of how the reliability of realizing the anti-overflow protection through the anti-overflow electrode promotes has been solved, the technical scheme who solves this problem mainly is that control circuit includes MCU and the switch circuit of control heater and commercial power break-make, first anti-overflow electrode, second anti-overflow electrode is connected with MCU's signal input pin electricity respectively, control circuit is still including being used for carrying out the switch protection circuit that protects according to the anti-overflow signal control switch circuit disconnection of first anti-overflow electrode or second anti-overflow electrode, switch protection circuit's control signal input part is connected with MCU's signal output pin and second anti-overflow electrode electricity respectively. The utility model discloses mainly used improves the reliability of anti-overflow protection.
Description
Technical Field
The utility model relates to a life electrical apparatus, especially a reliable commercial food preparation machine of anti-overflow.
Background
The existing commercial food processor has the disadvantages that the one-time preparation of the slurry is large, the slurry is easy to generate a large amount of foam due to heating and curing in the preparation process, the foam rising speed is high, the slurry overflowing situation is easy to occur, the overflowed slurry can cause short circuit of an electric control part, and safety accidents are caused. To solve this problem, general commercial food processing machines implement anti-overflow protection by controlling the pulping process or providing an anti-overflow electrode. The anti-overflow protection is realized by adopting a mode of controlling the pulping process, the anti-overflow action is slow, and the protection is not timely. The anti-overflow protection is realized by adopting the anti-overflow electrode, is relatively timely and is a common mode at present. The provision of the anti-overflow electrode requires the design of a corresponding anti-overflow circuit, and therefore, how to improve the reliability of the anti-overflow protection is one of the issues to be studied.
SUMMERY OF THE UTILITY MODEL
The utility model aims to achieve the purpose of providing a commercial food processor with reliable anti-overflow, which improves the reliability of anti-overflow protection.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a reliable commercial food preparation machine of anti-overflow, including staving and bung, be equipped with first anti-overflow electrode in the staving, second anti-overflow electrode and heater, first anti-overflow electrode is less than second anti-overflow electrode, be equipped with control circuit on the staving, control circuit includes MCU and the switch circuit of control heater and commercial power break-make, first anti-overflow electrode, second anti-overflow electrode is connected with MCU's signal input pin electricity respectively, control circuit is still including the switch protection circuit that is used for carrying out the protection according to the anti-overflow signal control switch circuit disconnection of first anti-overflow electrode or second anti-overflow electrode, switch protection circuit's control signal input part is connected with MCU's signal output pin and second anti-overflow electrode electricity respectively.
Furthermore, a first current-limiting resistor is arranged between a control signal input end of the switch protection circuit and a signal output pin of the MCU, a second current-limiting resistor is arranged between the control signal input end of the switch protection circuit and the second anti-overflow electrode, and the second current-limiting resistor is smaller than the first current-limiting resistor.
Furthermore, the switch protection circuit comprises a first triode and a first relay, the base electrode of the first triode is used as the control signal input end of the switch protection circuit, the collector electrode of the first triode is electrically connected with the coil of the first relay, and the contact of the first relay is connected in series with the power switch circuit.
Furthermore, a first comparator is arranged between the first anti-overflow electrode and a signal input pin of the MCU, the positive input end of the first comparator is electrically connected with the first anti-overflow electrode, the negative input end of the first comparator is electrically connected with a reference voltage, and the output end of the first comparator is electrically connected with the signal input pin of the MCU.
Furthermore, a first clamping diode is arranged between the first anti-overflow electrode and the anode input end of the first comparator.
Furthermore, a second comparator is arranged between the second anti-overflow electrode and a signal input pin of the MCU, the positive input end of the second comparator is electrically connected with the second anti-overflow electrode, the negative input end of the second comparator is electrically connected with a reference voltage, and the output end of the second comparator is electrically connected with the signal input pin of the MCU.
Furthermore, a second clamping diode is arranged between the second anti-overflow electrode and the anode input end of the second comparator.
Furthermore, a third comparator is arranged between the second anti-overflow electrode and the control signal input end of the switch protection circuit, the positive electrode input end of the third comparator is electrically connected with the second anti-overflow electrode, the negative electrode input end of the third comparator is electrically connected with the reference voltage, and the output end of the third comparator is electrically connected with the control signal input end of the switch protection circuit.
Further, a first microswitch for detecting whether the barrel cover is closed or not is arranged on the barrel body, the first microswitch is connected in series in the cover opening detection circuit, and the output end of the cover opening detection circuit is electrically connected with a signal input pin of the MCU; or the barrel body is provided with a second microswitch for detecting whether the barrel cover is opened or not, and the second microswitch is connected in series in the power switch circuit.
Further, the heater is connected with single-phase electricity or three-phase electricity in series.
After the technical scheme is adopted, the utility model has the advantages of as follows: the two anti-overflow electrodes are adopted, the MCU controls the power switch circuit to be disconnected for protection according to the anti-overflow signal of any one of the two anti-overflow electrodes, and the purpose of double protection is achieved; when the first anti-overflow electrode fails, the slurry foam contacts the second anti-overflow electrode, the second anti-overflow electrode functions, the control signal input end of the switch protection circuit is respectively and electrically connected with the signal output pin of the MCU and the second anti-overflow electrode, namely, the anti-overflow signal of the second anti-overflow electrode is respectively transmitted to the MCU and the switch protection circuit, a double-insurance mechanism that the software (MCU) controls the power switch circuit to be disconnected and the hardware (switch protection circuit) controls the power switch circuit to be disconnected is formed, as the hardware control is adopted, as long as the anti-overflow signal of the second anti-overflow electrode is transmitted to the switch protection circuit, the MCU outputs the control signal of the switch protection circuit to the high level or the low level, the power switch circuit is switched off, namely, the anti-overflow signal control priority of the second anti-overflow electrode is the highest, so that the MCU does not need to intervene, and the response speed of the switch, the reliability can be higher, and MCU control switch protection circuit disconnection power switch circuit, then can guarantee through MCU that power switch circuit disconnects when guaranteeing that hardware control is invalid to let power switch circuit break off reliably.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a control circuit diagram according to a first embodiment of the present invention;
fig. 2 is a control circuit diagram of a second embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
the utility model provides a reliable commercial food preparation machine of anti-overflow, including staving and bung, be equipped with first anti-overflow electrode in the staving, second anti-overflow electrode and heater, first anti-overflow electrode is less than second anti-overflow electrode, be equipped with control circuit on the staving, as shown in fig. 1, control circuit includes MCU and the switch circuit 11 of control heater and commercial power break-make, first anti-overflow electrode, second anti-overflow electrode is connected with MCU's signal input pin electricity respectively, control circuit is still including being used for carrying out the switch protection circuit 12 that protects according to the anti-overflow signal control switch circuit disconnection of first anti-overflow electrode or second anti-overflow electrode, switch protection circuit 12's control signal input part is connected with MCU's signal output pin and second anti-overflow electrode electricity respectively.
The utility model discloses in, adopt two anti-overflow electrodes and control the power switch circuit disconnection by MCU according to the anti-overflow signal of any one in two anti-overflow electrodes and protect, reach the purpose of duplicate protection, because first anti-overflow electrode is less than second anti-overflow electrode, therefore first anti-overflow electrode can produce the anti-overflow signal earlier than second anti-overflow electrode, when MCU according to the anti-overflow signal control power switch circuit disconnection of first anti-overflow electrode, the heater stops the heating promptly, does not need second anti-overflow electrode to play a role this moment; when the first anti-overflow electrode fails, the slurry foam contacts the second anti-overflow electrode, the second anti-overflow electrode functions, the control signal input end of the switch protection circuit is respectively and electrically connected with the signal output pin of the MCU and the second anti-overflow electrode, namely, the anti-overflow signal of the second anti-overflow electrode is respectively transmitted to the MCU and the switch protection circuit, a double-insurance mechanism that the software (MCU) controls the power switch circuit to be disconnected and the hardware (switch protection circuit) controls the power switch circuit to be disconnected is formed, as the hardware control is adopted, as long as the anti-overflow signal of the second anti-overflow electrode is transmitted to the switch protection circuit, the MCU outputs the control signal of the switch protection circuit to the high level or the low level, the power switch circuit is switched off, namely, the anti-overflow signal control priority of the second anti-overflow electrode is the highest, so that the MCU does not need to intervene, and the response speed of the switch, the reliability can be higher, and MCU control switch protection circuit disconnection power switch circuit, then can guarantee through MCU that power switch circuit disconnects when guaranteeing that hardware control is invalid to let power switch circuit break off reliably.
A first current limiting resistor R7 is arranged between a control signal input end of the switch protection circuit and a signal output pin I/O1 of the MCU, the size of R7 is such that Q3 can be smoothly saturated and conducted when the MCU outputs a high level, a second current limiting resistor R8 is arranged between the control signal input end of the switch protection circuit and the second anti-overflow electrode, in order to allow hardware control to function preferentially, the second current limiting resistor R8 may be required to be smaller than the first current limiting resistor R7, and preferably, the second current limiting resistor R8 is far smaller than the first current limiting resistor R7.
The switch protection circuit comprises a first triode Q3 and a first relay K3, the base electrode of the first triode is used as the control signal input end of the switch protection circuit, the collector electrode of the first triode is electrically connected with the coil of the first relay, and the contact of the first relay is connected in series with the power switch circuit. In this embodiment, the power switch circuit includes an AC contactor AC1, contacts of an AC contactor AC1 are connected in series with the main circuit (live line and neutral line), a coil of an AC contactor AC1 is connected in series with contacts of a first relay K3, and the protection principle of the hardware control is that when Vc is used, the protection principle is that<VREFWhen the IC1C outputs a low level, Q3 is turned off, the contact of K3 is released, the coil of the ac contactor 1 is de-energized, the contact of the ac contactor 1 is released, and the heater is de-energized to stop heating.
In this embodiment, as a practical and feasible solution, a first comparator IC1A may be disposed between the first anti-overflow electrode and the signal input pin of the MCU, a positive input terminal of the first comparator is electrically connected to the first anti-overflow electrode, a negative input terminal of the first comparator is electrically connected to the reference voltage, and an output terminal of the first comparator is electrically connected to the signal input pin of the MCU.
A first clamping diode D1 may be provided between the first anti-blooming electrode and the positive input terminal of the first comparator for some protection.
In the same way, a second comparator IC1B may be disposed between the second anti-overflow electrode and the signal input pin of the MCU, the positive input terminal of the second comparator is electrically connected to the second anti-overflow electrode, the negative input terminal of the second comparator is electrically connected to the reference voltage, and the output terminal of the second comparator is electrically connected to the signal input pin of the MCU.
A second clamping diode D5 may be provided between the second anti-overflow electrode and the positive input terminal of the second comparator for protection.
In addition, a third comparator IC1C may be arranged between the second anti-overflow electrode and the control signal input end of the switch protection circuit, the positive input end of the third comparator is electrically connected with the second anti-overflow electrode, the negative input end of the third comparator is electrically connected with the reference voltage, and the output end of the third comparator is electrically connected with the control signal input end of the switch protection circuit. The third comparator IC1C and the second comparator IC1B may share D5.
In order to better control the operation of the heater, the power switch circuit in the embodiment further comprises a second triode Q1 and a second relay K1 which individually control the operation of the heater H1 through the MCU, wherein the base of the Q1 is electrically connected with the signal output pin of the MCU, the collector of the Q1 is electrically connected with the coil of the K1, and the contact of the K1 is connected in series with the heater. If the number of heaters is increased, the number of triodes and relays can be increased accordingly, for example, two heaters H1 and H2 are provided in the present embodiment, and a third triode Q2 and a third relay K2 are added accordingly. Different heaters can be controlled respectively, heating with different powers can be realized, and functions such as rapid heating, heat preservation heating and the like can be realized.
In order to improve the security of product, prevent that the bung from being opened by accident and producing the danger that the thick liquid splashes and lead to the user to scald at the thick liquid in-process of making the thick liquid, can be equipped with on the staving and be used for detecting first micro-gap switch S1 that the bung closed, first micro-gap switch establishes ties in uncapping detection circuitry 13, uncap detection circuitry 'S output is connected with MCU' S signal input pin electricity, MCU discerns the bung and is opened, then corresponding power consumption part can be controlled and response is carried out, for example, with the heater outage, modes such as crushing motor outage, avoid the thick liquid to splash and scald the. Except for the software cover opening protection mode, a hardware cover opening protection mode can be adopted, namely a second microswitch S2 for detecting whether the barrel cover is opened or not is arranged on the barrel body, and the second microswitch is connected in series in a power switch circuit. Once the barrel cover is opened, the second microswitch is disconnected to disconnect the power switch circuit, and the heater is powered off to stop working.
Example two:
in the first embodiment, the heater is connected in series with the single-phase power, and in addition, the heater can also be connected in series with the three-phase power, as shown in fig. 2, three heaters, H1, H2 and H3, are arranged, and are controlled to be on and off respectively through the MCU.
Other contents not described in this embodiment may refer to embodiment one.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.
Claims (10)
1. The utility model provides a reliable commercial food preparation machine of anti-overflow, includes staving and bung, is equipped with first anti-overflow electrode, second anti-overflow electrode and heater in the staving, and first anti-overflow electrode is less than second anti-overflow electrode, is equipped with control circuit on the staving, and control circuit includes MCU and the switch circuit of control heater and commercial power break-make, and first anti-overflow electrode, second anti-overflow electrode are connected with MCU's signal input pin electricity respectively, its characterized in that, control circuit still including being used for carrying out the switch protection circuit that protects according to the anti-overflow signal control switch circuit disconnection of first anti-overflow electrode or second anti-overflow electrode, switch protection circuit's control signal input part is connected with MCU's signal output pin and second anti-overflow electrode electricity respectively.
2. The spill-proof reliable commercial food processor as defined in claim 1, wherein a first current limiting resistor is provided between the control signal input terminal of said switch protection circuit and the signal output pin of the MCU, and a second current limiting resistor is provided between the control signal input terminal of the switch protection circuit and the second spill-proof electrode, the second current limiting resistor being smaller than the first current limiting resistor.
3. An overflow-proof, reliable commercial food processor as defined in claim 1 or 2, wherein said switch protection circuit comprises a first transistor and a first relay, the base of the first transistor is used as the control signal input terminal of the switch protection circuit, the collector of the first transistor is electrically connected with the coil of the first relay, and the contact of the first relay is connected in series with the power switch circuit.
4. The spill-proof reliable commercial food processor as defined in claim 1, wherein a first comparator is provided between the first spill-proof electrode and the signal input pin of the MCU, the positive input terminal of the first comparator is electrically connected to the first spill-proof electrode, the negative input terminal of the first comparator is electrically connected to the reference voltage, and the output terminal of the first comparator is electrically connected to the signal input pin of the MCU.
5. The spill-resistant, reliable commercial food processor as defined in claim 4 wherein a first clamping diode is provided between said first spill-resistant electrode and the positive input of the first comparator.
6. The spill-proof reliable commercial food processor as defined in claim 1, wherein a second comparator is provided between the second spill-proof electrode and the signal input pin of the MCU, the positive input terminal of the second comparator is electrically connected to the second spill-proof electrode, the negative input terminal of the second comparator is electrically connected to the reference voltage, and the output terminal of the second comparator is electrically connected to the signal input pin of the MCU.
7. The spill-resistant, reliable commercial food processor as defined in claim 6 wherein a second clamping diode is provided between said second spill-resistant electrode and the positive input of the second comparator.
8. The spill-proof, reliable commercial food processor as defined in claim 1 wherein a third comparator is provided between said second spill-proof electrode and the control signal input of the switch protection circuit, the positive input of said third comparator being electrically connected to said second spill-proof electrode, the negative input of said third comparator being electrically connected to a reference voltage, the output of said third comparator being electrically connected to the control signal input of the switch protection circuit.
9. The spill-proof and reliable commercial food processor as claimed in claim 1, wherein the barrel body is provided with a first microswitch for detecting whether the barrel cover is closed or not, the first microswitch is connected in series in the cover opening detection circuit, and the output end of the cover opening detection circuit is electrically connected with the signal input pin of the MCU; or the barrel body is provided with a second microswitch for detecting whether the barrel cover is opened or not, and the second microswitch is connected in series in the power switch circuit.
10. The spill-resistant, reliable commercial food processor as defined in claim 1 wherein said heater is connected in series with single or three phase electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020236639.0U CN212281006U (en) | 2020-03-02 | 2020-03-02 | Anti-overflow reliable commercial food preparation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020236639.0U CN212281006U (en) | 2020-03-02 | 2020-03-02 | Anti-overflow reliable commercial food preparation machine |
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| Publication Number | Publication Date |
|---|---|
| CN212281006U true CN212281006U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020236639.0U Active CN212281006U (en) | 2020-03-02 | 2020-03-02 | Anti-overflow reliable commercial food preparation machine |
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| Country | Link |
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| CN (1) | CN212281006U (en) |
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- 2020-03-02 CN CN202020236639.0U patent/CN212281006U/en active Active
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