CN106469904B - Control circuit of food crushing device and food crushing device - Google Patents

Control circuit of food crushing device and food crushing device Download PDF

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Publication number
CN106469904B
CN106469904B CN201510507001.XA CN201510507001A CN106469904B CN 106469904 B CN106469904 B CN 106469904B CN 201510507001 A CN201510507001 A CN 201510507001A CN 106469904 B CN106469904 B CN 106469904B
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CN
China
Prior art keywords
motor
control circuit
circuit
food
current
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Application number
CN201510507001.XA
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Chinese (zh)
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CN106469904A (en
Inventor
尹坤任
戴亮
杨伸其
于三营
俞晓明
Original Assignee
广东美的生活电器制造有限公司
美的集团股份有限公司
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Priority to CN201510507001.XA priority Critical patent/CN106469904B/en
Publication of CN106469904A publication Critical patent/CN106469904A/en
Application granted granted Critical
Publication of CN106469904B publication Critical patent/CN106469904B/en

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Abstract

The invention discloses a control circuit of a food crushing device and the food crushing device, wherein the control circuit comprises: the power supply interface comprises a first terminal and a second terminal; the circuit board is provided with a motor controller, and one end of the motor controller is connected with a first wiring end of the power supply interface; the circuit protection device is used for switching off when the current in the control circuit is greater than the preset current so as to perform power-off protection on the control circuit; and one end of the motor is connected with the other end of the circuit protection device, and the other end of the motor is connected with a second wiring end of the power supply interface. The control circuit can automatically disconnect the control circuit by the circuit protection device when the motor load is overlarge or the current in the control circuit is overlarge due to rotation blockage, so that the damage of the motor, a circuit board and the like is avoided, the safety of the food crushing device is improved, and the maintenance cost is reduced.

Description

Control circuit of food crushing device and food crushing device

Technical Field

The invention relates to the technical field of household appliances, in particular to a control circuit of a food crushing device and the food crushing device.

Background

At present, food crushing devices sold in the market, such as a soybean milk machine, a meat grinder, a blender, a juicer and the like, can cause burning of the food crushing devices due to improper use of users, for example, when too much crushed or stirred food is put into the food crushing devices by users, the power of a motor is far beyond the rated range of the motor during working, so that the current in a control circuit of the food crushing devices is too large, the motor and the like are easily damaged, even the motor is burnt, devices in the control circuit can be punctured, particularly, some expensive devices, such as a silicon controlled rectifier, a bridge rectifier and the like, need to be replaced during maintenance, and the cost is high. In addition, the control circuit has overlarge current, so that the hidden danger of burning and firing also exists, and certain threat is formed to the lives and properties of users.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, a first object of the invention is to propose a control circuit of a food crushing device. The control circuit can effectively improve the safety of the food crushing device and has the advantages of low maintenance cost and simple and quick maintenance.

A second object of the present invention is to provide a food grating device.

In order to achieve the above object, a first embodiment of the present invention provides a control circuit for a food crushing device, including: a power supply interface comprising a first terminal and a second terminal; the circuit board is provided with a motor controller, and one end of the motor controller is connected with a first wiring end of the power supply interface; the circuit protection device is used for switching off when the current in the control circuit is greater than a preset current so as to perform power-off protection on the control circuit; and one end of the motor is connected with the other end of the circuit protection device, the other end of the motor is connected with a second wiring end of the power supply interface, and the motor is controlled by the motor controller.

According to the control circuit of the food crushing device provided by the embodiment of the invention, the circuit protection device such as the protective tube is connected in series between the motor controller and the motor to perform power-off protection on the control circuit of the motor, namely when the motor load in the control circuit is too large or the current in the circuit is too large due to rotation blockage, the circuit protection device can automatically disconnect the control circuit, the damage of the motor, a circuit board and the like is avoided, the safety of the food crushing device is improved, and the control circuit has the advantages of low maintenance cost and simplicity and quickness in maintenance.

In addition, the control circuit of the food crushing device according to the above embodiment of the invention may further have the following additional technical features:

according to an embodiment of the present invention, the circuit protection device is a current fuse, and the current fuse blows when the current in the control circuit is larger than a preset current.

According to one embodiment of the invention, the circuit protection device is arranged on the circuit board.

According to one embodiment of the invention, the circuit protection device is located between the circuit board and the motor.

According to an embodiment of the invention, the predetermined current is between 1 and 2.5 times the corresponding current value when the motor is operating at rated power.

According to an embodiment of the present invention, further comprising: and the thermistor is connected between the motor controller and the motor in series, and the motor controller controls the on-off of the control circuit according to a feedback signal of the thermistor.

In order to achieve the above object, a second embodiment of the present invention provides a food crushing device, which includes a control circuit of the food crushing device according to the first embodiment of the present invention. This food reducing mechanism is through a circuit protection device of establishing ties between motor controller and the motor in control circuit, like the protective tube, carry out power-off protection to the control circuit of motor, when motor load is too big or the stifled commentaries on classics causes the circuit in the electric current too big promptly in the control circuit, but circuit protection device automatic disconnection control circuit avoids damage such as motor and circuit board, promotes food reducing mechanism's security, and has that cost of maintenance is low, the simple swift advantage of maintenance.

In addition, the food crushing device according to the above embodiment of the invention may further have the following additional technical features:

according to one embodiment of the invention, the food comminuting device is: soybean milk maker, juice extractor, blender or noodle maker.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a control circuit of a food comminution apparatus in accordance with a first embodiment of the invention;

FIG. 2 is a schematic diagram of a control circuit of a food grating device according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a control circuit of a food comminution apparatus in accordance with a third embodiment of the invention;

fig. 4 is a schematic diagram of a control circuit of a food crushing apparatus according to a third embodiment of the invention.

A description of the reference numerals; power supply interface 100, circuit board 200, circuit protection device 300, motor 400, motor controller 201.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A control circuit of a food crushing apparatus and a food crushing apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a control circuit of a food grating device according to one embodiment of the present invention. As shown in fig. 1, the control circuit of the food crushing apparatus includes: power supply interface 100, circuit board 200, circuit protection device 300, and motor 400.

Wherein, the circuit board 200 is provided with a motor controller 201, and one end of the motor controller 201 is connected to the first terminal of the power supply interface 100. One end of the circuit protection device 300 is connected to the other end of the motor controller 201, and the circuit protection device 300 is configured to be turned off when a current in the control circuit is greater than a preset current, so as to perform power-off protection on the control circuit. One end of the motor 400 is connected to the other end of the circuit protection device 300, the other end of the motor 400 is connected to the second terminal of the power supply interface 100, and the motor 400 is controlled by the motor controller 201.

Specifically, the circuit protection device 300 may be a current fuse, which is blown when the current in the control circuit is greater than a preset current. The key part of the current fuse tube is a fuse wire, and the fuse wire is generally made of silver-copper alloy with relatively high resistivity and relatively low melting point. As a specific example, when too much food is put into the food crusher or the food mixer by a user, the load of the motor becomes large and even the motor is locked, and at this time, the current in the control circuit increases (for example, is larger than the preset current), and usually exceeds the corresponding current under the rated power of the motor, and once the duration time is too long, some parts such as the motor or the circuit board are easily burned or even ignited.

The preset current may be 1 to 2.5 times of a current value corresponding to the motor when the motor operates at a rated power, for example, when the current value corresponding to the motor operates at the rated power is 1A, a value of the preset current is 1A to 2.5A.

In an embodiment of the present invention, the first terminal of the power interface 100 is a hot interface, and the second terminal is a neutral interface.

As shown in fig. 1, the circuit protection device 300 may be disposed on the circuit board 200, so as to improve the integration of the control circuit of the food crushing device and reduce the volume. It should be noted that the circuit board 200 usually needs to be subjected to a glue filling process to make the circuit board 200 have better water resistance, but the devices on the circuit board 200 cannot be conveniently replaced due to the glue filling process. Therefore, in other examples of the present invention, as shown in fig. 2, the circuit protection device 300 may be disposed between the circuit board 200 and the motor 400, i.e., the circuit protection device 300 may be disposed outside the circuit board 200, so that the circuit protection device 300 may be more conveniently replaced.

According to the control circuit of the food crushing device provided by the embodiment of the invention, the circuit protection device such as the protective tube is connected in series between the motor controller and the motor to perform power-off protection on the control circuit of the motor, namely when the motor load in the control circuit is too large or the current in the circuit is too large due to rotation blockage, the circuit protection device can automatically disconnect the control circuit, the damage of the motor, a circuit board and the like is avoided, the safety of the food crushing device is improved, and the control circuit has the advantages of low maintenance cost and simplicity and quickness in maintenance.

As shown in fig. 3, in the control circuit of the food crushing device according to the embodiment of the invention, a thermistor 500 may be connected in series between the motor controller 201 and the motor 400, and the motor controller 201 may control the on/off of the control circuit according to a feedback signal of the thermistor 500. The thermistor 500 is connected in series with the circuit protection device 300, and thus, the protection of double-layer protection is realized. It should be noted that the positions of the thermistor 500 and the circuit protection device 300 can be interchanged, and they can be mounted on the circuit board 200, or they can be mounted on the circuit board 200, and the connection and mounting are not limited to the case shown in fig. 3. As shown in fig. 4, the thermistor 500 may also be connected in series between the motor 400 and the second terminal of the power supply port 100.

When the control circuit normally works, the temperature of the motor 400 detected by the thermistor 500 is relatively low, when the control circuit has overlarge motor load or overlarge current due to stalling, the temperature of the motor 400 can be increased, the thermistor 500 feeds back the detected temperature of the motor 400 to the motor controller 201, the motor controller 201 knows that the current temperature of the motor 400 is overhigh, and the current temperature is possibly caused by the overlarge current, so that the motor controller 201 can control the control circuit to be disconnected at the moment in order to protect the motor or a circuit board and the like.

It should be noted that the temperature of the motor 400 is not very high under normal operation conditions, but becomes high under excessive load or locked-up conditions, so that a temperature threshold or a temperature threshold range can be determined empirically or experimentally. Thus, when the thermistor 500 detects that the temperature of the motor 400 exceeds the temperature threshold or a range of temperature thresholds, the control circuit can be temporarily turned off to protect the motor 400 or the circuit board, etc.

Further, embodiments of the present invention disclose a food grating device comprising a control circuit of a food grating device as embodied in the first aspect of the invention.

The food crushing device can be a soybean milk machine, a juice extractor, a stirrer or a noodle maker, and the food crushing devices can cause motor blocking and overlarge control circuit current due to overload work of a motor caused by too much food placed in the device, too thick food and the like, so that the motor or other devices can be damaged.

According to the food smashing device provided by the embodiment of the invention, the circuit protection device such as the protective tube is connected in series between the motor controller and the motor in the control circuit to perform power-off protection on the control circuit of the motor, namely when the motor in the control circuit is overloaded or is blocked to cause overlarge current in the control circuit, the circuit protection device is automatically disconnected to stop the motor in power-off, so that the damage of the motor or other expensive electronic devices is avoided, and the circuit protection device only needs to be maintained or replaced subsequently, therefore, the cost is low, and the operation is easy.

In addition, other structures and functions of the food crushing device according to the embodiment of the invention are known to those skilled in the art, and are not described herein for the sake of reducing honor.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (7)

1. A control circuit for a food comminuting device, comprising:
a power supply interface comprising a first terminal and a second terminal;
the circuit board is provided with a motor controller, and one end of the motor controller is connected with a first wiring end of the power supply interface;
the circuit protection device is used for switching off when the current in the control circuit is greater than a preset current so as to perform power-off protection on the control circuit; and
one end of the motor is connected with the other end of the circuit protection device, the other end of the motor is connected with a second wiring end of the power supply interface, and the motor is controlled by the motor controller;
the thermistor is connected in series between the motor controller and the motor or between the power supply interface and the motor, and is used for detecting the temperature of the motor, wherein the motor controller also controls the on-off of the control circuit according to a feedback signal of the thermistor, the feedback signal is the temperature of the motor, and when the temperature of the motor exceeds a temperature critical value or a temperature critical range, the control circuit is controlled to be switched off.
2. The control circuit of claim 1, wherein the circuit protection device is a current fuse that blows when the current in the control circuit is greater than a predetermined current.
3. The control circuit of the food crushing device according to claim 1 or 2, wherein the circuit protection device is disposed on the circuit board.
4. The control circuit of a food crushing apparatus according to claim 1 or 2, characterized in that the circuit protection device is located between the circuit board and the motor.
5. The control circuit of the food crushing device of claim 1, wherein the preset current is between 1 and 2.5 times of a corresponding current value when the motor operates at a rated power.
6. A food reducing apparatus, comprising: the control circuit of the food crushing device of any of claims 1 to 5.
7. The food grater apparatus of claim 6, wherein the food grater apparatus is: soybean milk maker, juice extractor, blender or noodle maker.
CN201510507001.XA 2015-08-18 2015-08-18 Control circuit of food crushing device and food crushing device CN106469904B (en)

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CN201510507001.XA CN106469904B (en) 2015-08-18 2015-08-18 Control circuit of food crushing device and food crushing device

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CN106469904B true CN106469904B (en) 2020-06-05

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107482988B (en) * 2017-05-18 2020-08-07 浙江绍兴苏泊尔生活电器有限公司 Food processor and control method thereof

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN102327062A (en) * 2011-07-30 2012-01-25 浙江绍兴苏泊尔生活电器有限公司 Abrasive soymilk grinder and stalling-prevention method thereof
CN202309035U (en) * 2011-10-12 2012-07-04 美的集团有限公司 Protective circuit of juicer
CN104106988A (en) * 2013-04-16 2014-10-22 亚弘电科技股份有限公司 Food processor and safety positioning detecting method for same
CN204905844U (en) * 2015-08-18 2015-12-23 广东美的生活电器制造有限公司 Control circuit and food reducing mechanism of food reducing mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102355089A (en) * 2011-09-30 2012-02-15 田乃信 Automatic identification motor switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102327062A (en) * 2011-07-30 2012-01-25 浙江绍兴苏泊尔生活电器有限公司 Abrasive soymilk grinder and stalling-prevention method thereof
CN202309035U (en) * 2011-10-12 2012-07-04 美的集团有限公司 Protective circuit of juicer
CN104106988A (en) * 2013-04-16 2014-10-22 亚弘电科技股份有限公司 Food processor and safety positioning detecting method for same
CN204905844U (en) * 2015-08-18 2015-12-23 广东美的生活电器制造有限公司 Control circuit and food reducing mechanism of food reducing mechanism

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