CN214631789U - Food processing machine - Google Patents
Food processing machine Download PDFInfo
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- CN214631789U CN214631789U CN202023038828.6U CN202023038828U CN214631789U CN 214631789 U CN214631789 U CN 214631789U CN 202023038828 U CN202023038828 U CN 202023038828U CN 214631789 U CN214631789 U CN 214631789U
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- winding
- live wire
- zero line
- control circuit
- detection
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- 238000004804 winding Methods 0.000 claims abstract description 90
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000000227 grinding Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Control Of Ac Motors In General (AREA)
- Food-Manufacturing Devices (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a food preparation machine, belong to life electrical apparatus field, whether the crushing motor of having solved through current detection can't distinguish to overload and use, can't carry out the problem of protection effectively to crushing motor, the technical scheme who solves this problem mainly is that stator winding is including the live wire winding that has the live wire end and the zero line winding that has the zero line end, the live wire end, the zero line end is connected with control circuit electricity and inserts working circuit with live wire winding and zero line winding, be equipped with two sense terminals on the stator winding, at least one sense terminal takes a percentage for the winding, control circuit switches on with two sense terminals and forms the sense loop, control circuit is including the current detection circuit who detects live wire or zero line current. The utility model discloses the mainly used reduces the discernment degree of difficulty that the electric current changes unusually, ensures that crushing motor carries out the reliability of discernment protection through current detection.
Description
Technical Field
The utility model relates to a life electrical apparatus, especially a food preparation machine.
Background
In food processing machines on the market at present, alternating current series excited motors are mostly adopted as crushing motors, the good overload resistance of the crushing motors is deeply loved by consumers, the overload resistance of small series excited motors is limited at last, and when the users test multiple limit materials, the crushing motors need to be protected by means of external software and hardware so as to prevent overload burning. There are three general protection methods: the current protection is realized, namely, the current detection protection is realized through program software, but the traditional current detection sampling precision is low, and the identification protection can be realized only under the condition that the difference value between abnormal current and normal current is large; the temperature protector is used, and the traditional temperature controller has lagging temperature protection and unreliable protection; and thirdly, the temperature current type protector is expensive, and the temperature current type temperature controller can ensure reliable protection only under the condition that the difference value between the abnormal current and the normal current is large. For food processing machines with a plurality of lower crushing motors, when the traditional series excited motors are used in a mode of overloading multiple materials, the crushing cutter can only drive the slurry in the center of the crushing cup to rotate due to the fact that the slurry is too thick, and therefore the current AD sampling value of the traditional series excited motors is basically close to the normal material quantity, whether the crushing motors are used in an overload mode or not can not be distinguished through current detection, and the crushing motors cannot be effectively protected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to reach aims at providing a food preparation machine, reduce the discernment degree of difficulty that the electric current changes unusually, ensure that crushing motor carries out the reliability of discerning the protection through current detection.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a food preparation machine, include the organism and locate the crushing unit of organism, control circuit, crushing unit is including smashing the cup, smash sword and crushing motor, smash the sword and be located smash the cup and install on the output shaft of crushing motor, crushing motor is the series excited machine, crushing motor includes stator and rotor, the stator includes stator winding, stator winding is including the live wire winding that has the live wire end and the zero line winding that has the zero line end, the live wire end, the zero line end is connected with control circuit electricity and inserts working circuit with live wire winding and zero line winding, be equipped with two sense terminals on the stator winding, at least one sense terminal takes a percentage for the winding, control circuit switches on with two sense terminals and forms detection circuit, control circuit is including the current detection circuit who detects live wire or zero line current.
Furthermore, the number of turns of the coil between the two detection ends is 20% -80% of the total number of turns of the coil of the stator winding.
Furthermore, one detection end is arranged on the live wire winding, and the other detection end is arranged on the zero wire winding.
Furthermore, one winding tap is arranged on the live wire winding, and the zero line end is multiplexed into a detection end.
Furthermore, one winding tap is arranged on the zero line winding, and the fire line end is multiplexed into a detection end.
Furthermore, the two detection ends are both winding taps.
Further, the number of coil turns between the two detection ends is 50% of the total number of coil turns of the stator winding.
Furthermore, the control circuit comprises an MCU and a detection switch circuit, the detection switch circuit comprises an electric control switch, and the electric control switch is electrically connected between the live wire and the detection end or between the zero wire and the detection end and is controlled to be switched on and off by the MCU.
Further, the electric control switch is a silicon controlled rectifier or a relay.
Furthermore, the MCU is provided with a detection port for acquiring current, and the detection port is electrically communicated with the live wire or the zero line to form a current detection circuit.
After the technical scheme is adopted, the utility model has the advantages of as follows: by means of the mode of increasing winding taps, one crushing motor can have two different characteristics. Because the winding tap is a wire end led out from the middle part of the stator winding, the number of turns of a coil between the two detection ends is less than that of the turns of a bus coil of the stator winding, when the control circuit is conducted with the two detection ends to form a detection loop, the number of turns of the coil is less, the motor characteristics are soft, the current change difference of the crushing motor is obvious under different loads, the identification difficulty of the abnormal change of the current is reduced, the abnormal change conditions of the current of materials and overload conditions can be identified more easily through the current detection circuit, and the reliability of identification and protection of the crushing motor through current detection is ensured; and the stator winding is completely connected with the control circuit, the number of turns of the coil is recovered to the maximum value, the motor characteristic is hardened, the working current of the grinding motor changes little along with the load, and the grinding motor is suitable for cutting and grinding materials by high-speed rotation. In addition, the speed regulation of the grinding motor can be realized by adjusting the number of turns of the total coil of the stator winding, and the power loss of the motor caused by low-speed chopping can be reduced.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a food processor according to the present invention;
FIG. 2 is a schematic diagram of the control circuit electrically connected to the shredder motor according to one embodiment;
FIG. 3 is a schematic view of the control circuit electrically connected to the pulverizing motor according to the second embodiment;
FIG. 4 is a schematic view of the control circuit electrically connected to the pulverizing motor according to the third embodiment;
FIG. 5 is a schematic diagram of the fourth embodiment in which the control circuit is electrically connected to the shredder motor.
Detailed Description
The first embodiment is as follows:
the utility model provides a food processor, as shown in figure 1, comprising a machine body 1, a crushing component and a control circuit, wherein the crushing component and the control circuit are arranged on the machine body 1, the crushing component comprises a crushing cup 2, smash sword 3 and crushing motor 4, smash sword 3 and be located smash cup 2 and install on the output shaft of crushing motor 4, crushing motor 4 is the series excited machine, crushing motor 4 includes stator and rotor, the stator includes stator winding, combine figure 2 to see, stator winding is including live wire winding L1 that has live wire end L11 and zero line winding L2 that has zero line end L21, live wire end L11, zero line end L21 is connected with control circuit electricity and inserts working circuit with live wire winding L1 and zero line winding L2, be equipped with two sense terminals on the stator winding, at least one sense terminal is the winding S of taking a percentage, control circuit switches on with two sense terminals and forms the sense circuit, control circuit is including the current detection circuit who detects live wire or zero line current.
The utility model discloses the utilization increases the mode that the winding was taken a percentage S for a crushing motor 4 can possess the characteristic of two kinds of differences. Because the winding tap S is a wire end led out from the middle part of the stator winding, the number of turns of a coil between the two detection ends is less than that of the turns of a bus coil of the stator winding, when the control circuit is conducted with the two detection ends to form a detection loop, the number of turns of the coil is less, the motor characteristics are soft, the current change difference of the crushing motor 4 is obvious under different loads, the identification difficulty of abnormal current change is reduced, the abnormal current change conditions of materials and overload conditions can be identified more easily through the current detection circuit, and the reliability of identification and protection of the crushing motor 4 through current detection is ensured; and the stator winding is completely connected with the control circuit, the number of turns of the coil is recovered to the maximum value, the motor characteristic is hardened, the working current of the crushing motor 4 changes little along with the load, and the crushing motor is suitable for cutting and crushing materials by high-speed rotation. In addition, the speed regulation of the crushing motor 4 can be realized by adjusting the number of turns of the total coil of the stator winding, and the power loss of the motor caused by low-speed chopping can be reduced.
The number of turns of the coil between the two detection ends is too small, which may cause overlarge current, and the requirement on the rated parameter of the control circuit is too high, which may increase the cost, while the number of turns of the coil between the two detection ends is too large, which may make the motor characteristics hard and not enough to reduce the difficulty in identifying abnormal changes of current, so that in order to ensure the reliability of current detection, the number of turns of the coil between the two detection ends needs to be controlled to be 20% -80% of the number of turns of the total coil of the stator winding.
The control circuit typically includes live L and neutral N conductors, and may include other electrical components such as power switches. In this embodiment, one of the detection terminals is disposed on the live winding L1, and the other detection terminal is disposed on the neutral winding L2. In order to reduce the number of winding taps S, only one winding tap S may be provided as in the present embodiment, and the zero line terminal L21 is selected to be multiplexed as a detection terminal, and the winding tap S is provided at the end of the live line winding L1. For example, as shown in fig. 2, the number of coil turns between the two sensing terminals is 50% of the total number of coil turns of the stator winding.
In order to detect the current when necessary, the detection end can be electrically controlled, for example, the control circuit in this embodiment includes an MCU and a detection switch circuit, the detection switch circuit includes an electric control switch, and the electric control switch is electrically connected between the live wire and the detection end or between the zero wire and the detection end, and is controlled to be turned on or off by the MCU.
As a common option, the electrically controlled switch of this embodiment may be a thyristor. For example, as shown in fig. 2, the electrically controlled switch is a first thyristor TRC1, the input terminal T1 of the first thyristor TRC1 is electrically connected to the live wire, the output terminal T2 is electrically connected to the winding tap S, and the control terminal G is controlled by the MCU. In order to obtain the current in the detection loop in real time, the MCU has a detection port Iad for obtaining the current, the detection port Iad is electrically connected to the live wire to form a current detection circuit, and the detection port Iad is electrically connected to the neutral wire to form a current detection circuit. When the MCU gives a conducting signal to conduct the input end T1 and the output end T2 of the first silicon controlled rectifier TRC1, the live wire winding L1 is short-circuited, only the zero wire winding L2 of the crushing motor 4 is connected to the detection loop, and at the moment, the detection port of the MCU can more easily obtain the current change in the detection loop, so that the type of the material or whether the material is overloaded is judged.
Example two:
the winding tap S may also be provided on the zero line winding L2, as shown in fig. 3, at this time, the live line end L11 is multiplexed as a detection end, the input end T1 of the first thyristor TRC1 is electrically conducted with the winding tap S, the output end T2 is electrically conducted with the zero line, and the control end G is controlled by the MCU.
Other contents not described in this embodiment may refer to embodiment one.
Example three:
besides selecting the thyristor, the electronic control switch may also be a relay, for example, as shown in fig. 4, a winding tap S is provided on a live wire winding L1, a zero wire end L21 is multiplexed as a detection end, an input end of the relay is electrically conducted with the live wire, an output end of the relay can be selectively electrically conducted with the live wire end L11 and the winding tap S, and a coil of the relay is controlled to be powered on or powered off by the MCU. The coil of the relay is electrified, the contact of the relay moves from B2 to B1, the output end of the relay is electrically conducted with the winding tap S and is disconnected with the live wire end L11, the live wire winding L1 is disconnected, and the number of turns of the coil between the two detection ends is 50% of the number of turns of the stator winding bus coil.
Other contents not described in this embodiment may refer to the first embodiment or the second embodiment.
Example four:
in addition to selecting one of the detection terminals as the winding tap S, both of the two detection terminals may be selected as the winding taps. As shown in fig. 5, the electronic control switch in this embodiment selects two relays, the input terminal of the first relay K1 is electrically connected to the live wire, the output terminal of the first relay K1 is electrically connected to the live wire terminal L11 and the winding tap S1 on the live wire winding L1, the input terminal of the second relay K2 is electrically connected to the neutral wire, the output terminal of the second relay K2 is electrically connected to the neutral wire terminal L21 and the winding tap S2 on the neutral wire winding L2, and the coils of the first relay K1 and the second relay K2 are controlled by the MCU to be powered on or powered off. In this embodiment, the number of turns of the coil between the two detection ends, the number of turns of the coil between the detection end on the live wire winding L1 and the zero wire end L21, and the number of turns of the coil between the detection end on the zero wire winding L2 and the live wire end L11 may be designed differently, and then the whole stator winding is used, so that the grinding motor 4 may obtain four different characteristics, and the functions of the food processor may be expanded according to different output power requirements.
It can be understood that the two relays can be replaced by two thyristors as the electric control switch.
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 food preparation machine, include the organism and locate the crushing unit of organism, control circuit, crushing unit is including smashing the cup, smash sword and crushing motor, smash the sword and be located smash the cup and install on the output shaft of crushing motor, crushing motor is the series excited machine, crushing motor includes stator and rotor, the stator includes stator winding, stator winding is including the live wire winding that has the live wire end and the zero line winding that has the zero line end, the live wire end, the zero line end is connected with control circuit electricity and inserts working circuit with live wire winding and zero line winding, a serial communication port, be equipped with two sense terminals on the stator winding, at least one sense terminal is taken a percentage for the winding, control circuit switches on with two sense terminals and forms detection circuit, control circuit is including the electric current detection circuit who detects live wire or zero line current.
2. The food processor of claim 1, wherein the number of coil turns between the two sensing terminals is between 20% and 80% of the total number of coil turns of the stator winding.
3. The food processor of claim 1, wherein one of the sensing terminals is disposed on the hot winding and the other of the sensing terminals is disposed on the neutral winding.
4. The food processor of claim 3, wherein the winding tap is provided one and on the hot winding and the neutral terminal is multiplexed as a sensing terminal.
5. The food processor of claim 3, wherein the winding tap is provided one and on the neutral winding and the live end is multiplexed as a sensing end.
6. The food processor of claim 3, wherein both sensing terminals are winding taps.
7. A food processor as claimed in claim 4, 5 or 6, wherein the number of coil turns between two sensing terminals is 50% of the total number of coil turns of the stator winding.
8. The food processor of any one of claims 1 to 6, wherein the control circuit comprises an MCU and the detection switch circuit comprises an electrically controlled switch electrically connected between the live wire and the detection terminal or between the neutral wire and the detection terminal and controlled by the MCU.
9. The food processor of claim 8, wherein the electrically controlled switch is a thyristor or a relay.
10. The food processor of claim 8, wherein the MCU has a current sensing port in electrical communication with either the live or neutral conductors to form a current sensing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023038828.6U CN214631789U (en) | 2020-12-16 | 2020-12-16 | Food processing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023038828.6U CN214631789U (en) | 2020-12-16 | 2020-12-16 | Food processing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214631789U true CN214631789U (en) | 2021-11-09 |
Family
ID=78499875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023038828.6U Active CN214631789U (en) | 2020-12-16 | 2020-12-16 | Food processing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214631789U (en) |
-
2020
- 2020-12-16 CN CN202023038828.6U patent/CN214631789U/en active Active
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