Motor control detection circuit of stirrer and electric cooking utensil

Abstract

The utility model relates to a motor control detection circuit of a stirrer and an electric cooking utensil, and the motor control detection circuit comprises a motor control circuit and a motor detection circuit. The output end of the motor control circuit is connected with the input end of the motor detection circuit and used for outputting control current to the motor and the motor detection circuit, and the motor operates under the control current; the control current is alternating current; the motor detection circuit is used for detecting the control current and generating a corresponding detection signal; if the proportion of the high level in the detection signal does not meet the preset condition, it is confirmed that water seepage exists in the motor, and the motor control circuit stops outputting the control current. According to the application, the problems that in the prior art, whether water seepage of the motor cannot be detected, and potential safety hazards exist in use are solved, the motor detection circuit is utilized to detect the control current of the motor, and then whether water seepage exists in the motor is determined, so that water seepage detection of the motor is realized, and the potential safety hazards in water seepage use are eliminated.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and in particular to a motor control detection circuit of a blender and an electric cooking appliance. Background Art

[0002] As the types and precision of small household appliances increase, blenders are increasingly used. The blender includes a cover, a body, and a control circuit; a motor is installed in the cover, which rotates under the control of the control circuit and drives the blade connected to the motor to blend the ingredients in the body. During the blending process, the water vapor in the body will penetrate into the motor and condense, causing water to seep into the motor. The current solution cannot detect whether the motor is leaking water. If the motor continues to be used when it is leaking water, there will be safety hazards.

[0003] With regard to the problem that the relevant technology cannot detect whether the motor has water seepage, which poses a safety hazard in use, no effective solution has been proposed so far. Utility Model Content

[0004] In this embodiment, a motor control detection circuit for a blender and an electric cooking appliance are provided to solve the problem in the related art that it is impossible to detect whether the motor has water seepage, which poses a potential safety hazard in use.

[0005] In a first aspect, a motor control detection circuit for a blender is provided in this embodiment, comprising a motor control circuit and a motor detection circuit;

[0006] The output end of the motor control circuit is connected to the input end of the motor detection circuit, and is used to output a control current to the motor and the motor detection circuit, and the motor runs under the control current; the control current is alternating current;

[0007] The motor detection circuit is used to detect the control current and generate a corresponding detection signal; if the proportion of high level in the detection signal does not meet the preset conditions, it is confirmed that water seepage exists in the motor, and the motor control circuit stops outputting the control current.

[0008] Through this embodiment, the problem in the related art that it is impossible to detect whether the motor has water leakage, which poses a safety hazard in use, is solved. The motor detection circuit is used to detect the control current of the motor to confirm whether the motor has water leakage, thereby realizing the water leakage detection of the motor and eliminating the safety hazard of water leakage during use.

[0009] In some of the embodiments, the motor detection circuit includes a voltage divider module, a switch module and a pull-up resistor;

[0010] The voltage dividing module is connected to the output end of the motor control circuit and the control end of the switch module respectively, and is used to reduce the voltage of the control current;

[0011] The output end of the switch module is grounded, and the input end of the switch module is connected to an external power supply through the pull-up resistor;

[0012] The switch module is in an on state or an off state under the control of the stepped-down control current, and outputs a corresponding detection signal.

[0013] Through this embodiment, by utilizing the cooperation of the voltage divider module, the switch module and the pull-up resistor, the control current can be detected to output a detection signal, thereby stably and accurately detecting whether water seepage occurs in the motor.

[0014] In some of the embodiments, the voltage dividing module includes a resistor R1, a resistor R2 and a resistor R3;

[0015] One end of the resistor R1 is connected to the output end of the motor control circuit, and the other end of the resistor R1 is connected to one end of the resistor R2;

[0016] The other end of the resistor R2 is connected to one end of the resistor R3 and the control end of the switch module respectively;

[0017] The other end of the resistor R3 is grounded.

[0018] Through this embodiment, three voltage-dividing resistors are used to form a voltage-dividing module, which has a simple structure and stable operation, and can reduce the production cost of the entire circuit.

[0019] In some embodiments, the switch module is one of a transistor Q1 and a field effect transistor.

[0020] Through this embodiment, different devices are used to build the switch module to meet the needs of user selection.

[0021] In some of the embodiments, the motor detection circuit further includes a first filtering module and a protection module;

[0022] The input end of the first filter module is connected to the output end of the motor control circuit, and the output end of the first filter module is connected to the input end of the voltage divider module; the first filter module is used to filter the control current;

[0023] The input end of the protection module is connected to the input end of the switch module and the pull-up resistor respectively, and the output end of the protection module outputs the detection signal; the protection module is used to protect the motor detection circuit.

[0024] Through this embodiment, the accuracy and safety of the detection used are improved.

[0025] In some of the embodiments, the motor detection circuit further includes a second filtering module;

[0026] The input end of the second filter module is connected to the output end of the voltage divider module and the control end of the switch module respectively; the output end of the second filter module is grounded;

[0027] The second filtering module is used to filter the control current after voltage reduction.

[0028] Through this embodiment, the detection accuracy is further improved.

[0029] In some of the embodiments, the motor control circuit includes a motor control module and a thyristor;

[0030] The input end of the motor control module is connected to the neutral line; the output end of the motor control module is connected to the input end of the thyristor;

[0031] The output end of the thyristor is connected to the output end of the motor; the input end of the motor is connected to the live wire; the feedback end of the thyristor receives a control signal; the thyristor (12) outputs the control current under the control of the control signal; the control signal is determined by the detection signal.

[0032] Through this embodiment, the motor control module and the thyristor are used to complete the setting of the motor control circuit, thereby improving the control efficiency and ensuring the service life of the overall circuit.

[0033] In some of the embodiments, the preset condition is that the duty cycle of the high level in one cycle is 47.5% to 52.5%.

[0034] Through this embodiment, the preset condition is set as the duty cycle of the high level in one cycle is 47.5% to 52.5%, thereby reducing the probability of false detection.

[0035] In a second aspect, an electric cooking appliance is provided in this embodiment, comprising a cover, a body, and the motor control detection circuit as described in the first aspect;

[0036] A motor is arranged in the machine cover; a stirring member is connected to the motor;

[0037] The motor control detection circuit is connected to the motor and is used to control the operation of the motor.

[0038] In some embodiments, the first plug terminal of the motor is arranged in the cover, and the second plug terminal of the motor is arranged in the body; when the cover is closed, the first plug terminal contacts the second plug terminal.

[0039] Compared with the related art, the motor control detection circuit of the blender and the electric cooking appliance provided in this embodiment, wherein the motor control detection circuit of the blender includes a motor control circuit and a motor detection circuit; the output end of the motor control circuit is connected to the input end of the motor detection circuit, and is used to output a control current to the motor and the motor detection circuit, and the motor operates under the control current; the control current is alternating current; the motor detection circuit is used to detect the control current and generate a corresponding detection signal; if the proportion of high levels in the detection signal does not meet the preset conditions, it is confirmed that there is water leakage in the motor, and the motor control circuit stops outputting the control current; the problem that it is impossible to detect whether the motor is leaking water in the related art, which poses a safety hazard in use, is solved, and the motor detection circuit is used to detect the control current of the motor, and then confirm whether the motor is leaking water, thereby realizing water leakage detection of the motor and eliminating the safety hazard of water leakage in use.

[0040] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0042] Figure 1 is a schematic diagram of a motor control detection circuit of a blender provided in an embodiment of the present application;

[0043] Figure 2 is a schematic diagram of a motor detection circuit provided in an embodiment of the present application;

[0044] Figure 3 is a schematic diagram of a voltage divider module provided in an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of a motor control detection circuit of a blender provided in another embodiment of the present application.

[0046] In the figure: 10, motor control circuit; 11, motor control module; 12, thyristor; 20, motor detection circuit; 21, voltage divider module; 22, switch module; 23, pull-up resistor; 24, first filter module; 25, protection module; 26, second filter module. DETAILED DESCRIPTION

[0047] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0048] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0049] In this embodiment, a motor control detection circuit for a mixer is provided. Figure 1 FIG. 1 is a schematic diagram of the structure of the motor control detection circuit of the mixer of this embodiment. Figure 1 As shown, the motor control detection circuit includes: a motor control circuit 10 and a motor detection circuit 20;

[0050] The output end of the motor control circuit 10 is connected to the input end of the motor detection circuit 20, and is used to output a control current to the motor and the motor detection circuit 20, and the motor runs under the control current; the control current is alternating current;

[0051] The motor detection circuit 20 is used to detect the control current and generate a corresponding detection signal; if the detection signal does not meet the preset conditions, it is confirmed that there is water leakage in the motor, and the motor control circuit 10 stops outputting the control current.

[0052] It should be noted that the motor control detection circuit includes a motor control circuit 10 and a motor detection circuit 20. The motor control circuit 10 is mainly used to control the operation of the motor; the motor detection circuit 20 is mainly used to detect whether the motor is leaking water, thereby realizing water leakage detection of the motor and eliminating the safety hazards caused by water leakage.

[0053] Among them, the motor control circuit 10 has multiple implementations, for example: the motor control circuit 10 includes a motor control module 11 and a thyristor 12; the motor control module 11 outputs a control current to the motor detection circuit 20 and the motor by controlling the on and off of the thyristor 12; the motor runs under the control current; the control current is alternating current. For another example: the motor control circuit 10 includes a control chip and its surrounding circuits; with the cooperation of the control chip and its surrounding circuits, the control current is output to the motor detection circuit 20 and the motor; the motor runs under the control current. In other embodiments, the motor control circuit 10 may have other implementations, which are not illustrated one by one.

[0054] Among them, the motor detection circuit 20 has multiple implementation methods, for example: the motor detection circuit 20 includes a voltage divider module 21, a switch module 22 and a pull-up resistor 23; the control current is input to the control end of the switch module 22 through the voltage divider module 21; the output end of the switch module 22 is grounded; the input end of the switch module 22 is connected to the external power supply through the pull-up resistor 23, then the switch module 22 will output a high level signal when it is in the cut-off state; the switch module 22 will change its own state (in the on state or the cut-off state) with the control current, and output a corresponding detection signal. If the proportion of the high level in the detection signal does not meet the preset conditions, it is confirmed that the motor has water seepage, so that the motor control circuit 10 stops outputting the control current. For example: the motor detection circuit 20 includes a current detection chip and its surrounding circuits; the control current is detected with the cooperation of the current detection chip and its surrounding circuits to generate a corresponding detection signal; if the proportion of the high level in the detection signal does not meet the preset conditions, it is confirmed that the motor has water seepage, so that the motor control circuit 10 stops outputting the control current. In other embodiments, the motor detection circuit 20 may have other implementations, which are not illustrated one by one.

[0055] The detection signal is in the form of a duty cycle of high and low levels; the preset condition may be the proportion of the high level signal in one cycle. If the proportion of the high level is not within the proportion, it is considered that the proportion of the high level in the detection signal does not meet the preset condition, and it is confirmed that the motor has water seepage, so that the motor control circuit 10 stops outputting the control current.

[0056] In the related art, the structure of the blender includes a cover, a body, and a control circuit; a motor is provided in the cover, and the motor rotates under the control of the control circuit, and drives the blade connected to the motor to blend the ingredients in the body. During the blending process, the water vapor in the body will penetrate into the motor and condense, causing water to seep into the motor; however, the current solution cannot detect whether the motor has water seepage, and continuing to use the motor in the case of water seepage will pose a safety hazard. The motor control detection circuit of the blender provided in this embodiment includes a motor control circuit 10 and a motor detection circuit 20; the output end of the motor control circuit 10 is connected to the input end of the motor detection circuit 20, and is used to output a control current to the motor and the motor detection circuit 20, and the motor runs under the control current; the control current is alternating current; the motor detection circuit 20 is used to detect the control current and generate a corresponding detection signal; if the proportion of high levels in the detection signal does not meet the preset conditions, it is confirmed that the motor has water leakage, and the motor control circuit 10 stops outputting the control current; the motor detection circuit 20 is used to detect the control current of the motor, and then confirm whether the motor has water leakage, thereby realizing water leakage detection of the motor and eliminating the safety hazard of water leakage during use; the problem that the relevant technology cannot detect whether the motor has water leakage and there is a safety hazard in use is solved.

[0057] The following is a detailed description of each of the above components:

[0058] In some embodiments, such as Figure 2 As shown, the motor detection circuit 20 includes a voltage dividing module 21, a switch module 22 and a pull-up resistor 23;

[0059] The voltage dividing module 21 is connected to the output end of the motor control circuit 10 and the control end of the switch module 22 respectively, and is used to reduce the voltage of the control current;

[0060] The output end of the switch module 22 is grounded, and the input end of the switch module 22 is connected to an external power supply through a pull-up resistor 23;

[0061] The switch module 22 is in an on state or an off state under the control of the stepped-down control current, and outputs a corresponding detection signal.

[0062] Specifically, the control end of the switch module 22 is connected to the motor control circuit 10 through the voltage divider module 21, the input end of the switch module 22 is connected to the external power supply through the pull-up resistor 23, and the output end of the switch module 22 is grounded. The input end of the switch module 22 serves as the output of the motor detection circuit 20, and outputs a detection signal; if the switch module 22 is in the off state, due to the presence of the pull-up resistor 23, the detection signal output is a high-level signal. The switch module 22 will change its own state (in the on state or the off state) with the control current, and output the corresponding detection signal, for example: when the sine wave of the control current is in the positive half cycle, the switch module 22 is in the on state, so that the output detection signal is a low-level signal; when the sine wave of the control current is in the negative half cycle, the switch module 22 is in the off state, so that the output detection signal is a high-level signal; that is, the detection signal is a signal of alternating high and low levels, and the duty ratio of the high level and the low level is related to the waveform of the control current.

[0063] If there is no water seepage in the motor, the waveform of the control current will not be affected, and the duty ratio of the high level and the low level in the detection signal will be fixed. If water seepage occurs, the duty ratio of the high level and the low level in the detection signal will change. Therefore, as long as it is determined whether the duty ratio of the high level and the low level in the detection signal meets the preset conditions, it can be detected whether the motor has water seepage.

[0064] Through this embodiment, by utilizing the cooperation of the voltage divider module 21, the switch module 22 and the pull-up resistor 23, the control current can be detected to output a detection signal; thereby stably and accurately detecting whether water seepage occurs in the motor.

[0065] In some embodiments, such as Figure 3 As shown, the voltage dividing module 21 includes a resistor R1, a resistor R2 and a resistor R3;

[0066] One end of the resistor R1 is connected to the output end of the motor control circuit 10, and the other end of the resistor R1 is connected to one end of the resistor R2;

[0067] The other end of the resistor R2 is connected to one end of the resistor R3 and the control end of the switch module 22 respectively;

[0068] The other end of the resistor R3 is grounded.

[0069] Specifically, the voltage divider module 21 is composed of a plurality of voltage divider resistors, and is used to reduce the voltage of the input control current, and input the reduced voltage control current to the control end of the switch module 22, so that the switch module 22 changes its own state (in the on state or the off state) under different control circuit cycles. In other embodiments, the voltage divider module 21 can be composed of more or fewer electronic devices, which is not limited.

[0070] The voltage-dividing resistors are resistor R1, resistor R2 and resistor R3, one end of resistor R1 is connected to the output end of the motor control circuit 10, and the other end of resistor R1 is connected to one end of resistor R2; the other end of resistor R2 is respectively connected to one end of resistor R3 and the control end of the switch module 22; the other end of resistor R3 is grounded; the control current is reduced to the target threshold value by selecting the parameters of resistor R1, resistor R2 and resistor R3, and the target threshold value can be 5V, and the voltage of the external power supply connected to the pull-up resistor 23 can be 5V. The parameters of resistor R1, resistor R2 and resistor R3 can be adjusted to match different usage scenarios, so the parameters of resistor R1, resistor R2 and resistor R3 are not limited.

[0071] According to this embodiment, three voltage-dividing resistors are used to form the voltage-dividing module 21, which has a simple structure and stable operation, and can reduce the production cost of the entire circuit.

[0072] Below Figure 1 and Figure 4 Take this as an example to illustrate:

[0073] In some embodiments, the switch module 22 is a transistor Q1 or a field effect transistor.

[0074] Specifically, the switch module 22 has various forms. The input end of the switch module 22 will output a detection signal; the detection signal can be processed by an external processor (when water seepage is detected, an off control signal is output; when water seepage is not detected, an on control signal is output) and fed back to the thyristor 12 in the motor control circuit 10 to control the on and off of the thyristor 12.

[0075] By way of example: the switch module 22 is a transistor Q1; the base B of the transistor Q1 is connected to the output end of the voltage divider module 21; the collector C of the transistor Q1 is connected to the pull-up resistor 23 and outputs the detection signal as the output end; the emitter E of the transistor Q1 is grounded. By way of example: the switch module 22 is an N-channel MOS transistor; the gate G of the MOS transistor is connected to the output end of the voltage divider module 21; the drain D of the MOS transistor is connected to the pull-up resistor 23 and outputs the detection signal as the output end; the source S of the MOS transistor is grounded.

[0076] Through this embodiment, different devices are used to build the switch module 22 to meet the needs of user selection.

[0077] In some of the embodiments, the motor detection circuit 20 further includes a first filtering module 24 and a protection module 25;

[0078] The input end of the first filter module 24 is connected to the output end of the motor control circuit 10, and the output end of the first filter module 24 is connected to the input end of the voltage divider module 21; the first filter module 24 is used to filter the control current;

[0079] The input end of the protection module 25 is connected to the input end of the switch module 22 and the pull-up resistor 23 respectively, and the output end of the protection module 25 outputs a detection signal; the protection module 25 is used to protect the motor detection circuit 20.

[0080] The first filter module 24 is disposed between the motor control circuit 10 and the voltage divider module 21, and is used to filter the control current output by the motor control circuit 10 to improve the detection accuracy. Specifically, the first filter module 24 can be a diode D1, the positive electrode of the diode D1 is connected to the output end of the motor control circuit 10, and the negative electrode of the diode D1 is connected to the input end of the voltage divider module 21. In other embodiments, the first filter module 24 can be composed of other electronic devices, which is not limited.

[0081] The protection module 25 is arranged in the circuit before the output detection signal of the switch module 22, and is used to protect the subsequent circuit, especially the motor detection circuit 20, to improve the safety of use. Specifically, the protection module 25 can be a resistor R4; one end of the resistor R4 is respectively connected to the input end of the switch module 22 and the pull-up resistor 23, and the other end of the resistor R4 outputs the detection signal.

[0082] In some of the embodiments, the motor detection circuit 20 further includes a second filtering module 26;

[0083] The input end of the second filter module 26 is connected to the output end of the voltage divider module 21 and the control end of the switch module 22 respectively; the output end of the second filter module 26 is grounded;

[0084] The second filtering module 26 is used to filter the stepped-down control current.

[0085] Among them, the second filter module 26 is arranged in the circuit before the control end of the switch module 22, and the input end of the second filter module 26 is respectively connected to the output end of the voltage divider module 21 and the control end of the switch module 22; the output end of the second filter module 26 is grounded, and is used to filter the control current after the voltage is reduced, so as to further improve the detection accuracy. Specifically, the second filter module 26 can be a capacitor C1; the positive electrode of the capacitor C1 is respectively connected to the output end of the voltage divider module 21 and the control end of the switch module 22; the negative electrode of the capacitor C1 is grounded.

[0086] In some embodiments, the motor control circuit 10 includes a motor control module 11 and a thyristor 12;

[0087] The input end of the motor control module 11 is connected to the neutral line; the output end of the motor control module 11 is connected to the input end of the thyristor 12;

[0088] The output end of the thyristor 12 is connected to the output end of the motor; the input end of the motor is connected to the live wire; the feedback end of the thyristor 12 receives the control signal; the thyristor 12 outputs the control current under the control of the control signal; the control signal is determined by the detection signal.

[0089] Among them, the motor control module 11 mainly outputs the control current to the motor and the motor detection module through the thyristor 12, so that the motor runs under the control current. The motor control module 11 can be composed of a processing chip combined with surrounding circuits; it can also be directly composed of various electronic devices; there is no restriction on this. Among them, the thyristor 12 (Silicon Controlled Rectifier, SCR) is a high-power electrical component, also known as a thyristor. It is a three-terminal four-layer semiconductor device composed of alternating P-type and N-type materials. The feedback end of the thyristor 12 receives a control signal. If it is a disconnected control signal, the thyristor 12 is controlled to be disconnected; if it is a pass control signal, the thyristor 12 is controlled to be turned on.

[0090] Through this embodiment, the motor control module 11 and the thyristor 12 are used to complete the setting of the motor control circuit 10, thereby improving the control efficiency and ensuring the service life of the entire circuit.

[0091] In some of the embodiments, the preset condition is that the duty cycle of the high level in one cycle is 47.5% to 52.5%.

[0092] Among them, if there is no water leakage in the motor, then in the output detection signal, the high level and the low level each account for 50% in one cycle; if the motor has water leakage, it is equivalent to connecting resistors in parallel at both ends of the motor, so the proportion of high level in the output detection signal will become higher. Therefore, by setting the preset conditions according to the proportion, you can determine whether the motor has water leakage. For example, the preset condition is that the duty cycle of the high level in one cycle is 47.5% to 52.5%. Different usage scenarios will have different requirements for the accuracy of water leakage detection, so the range of the ratio can be adjusted to meet different accuracy requirements. It is generally believed that the larger the range, the lower the accuracy requirement.

[0093] Through this embodiment, the preset condition is set as the duty cycle of the high level in one cycle is 47.5% to 52.5%, thereby reducing the probability of false detection.

[0094] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0095] In this embodiment, an electric cooking appliance is also provided, comprising a cover, a body and the motor control detection circuit in each of the above embodiments;

[0096] A motor is arranged in the machine cover; a stirring element is connected to the motor;

[0097] The motor control detection circuit is connected to the motor and is used to control the operation of the motor.

[0098] The above-mentioned electric cooking appliance solves the problem in the related art that it is impossible to detect whether the motor has water leakage, which poses a safety hazard in use. The motor detection circuit 20 is used to detect the control current of the motor to confirm whether the motor has water leakage, thereby realizing the water leakage detection of the motor and eliminating the safety hazard of water leakage during use.

[0099] In some embodiments, the first plug terminal of the motor is arranged in the cover, and the second plug terminal of the motor is arranged in the body; when the cover is closed, the first plug terminal contacts the second plug terminal to supply power to the motor.

[0100] The first plug-in terminal and the second plug-in terminal have a plug-in structure, wherein the first plug-in terminal is arranged in the cover, and the second plug-in terminal is arranged in the body; if the cover is closed, the first plug-in terminal and the second plug-in terminal are plugged in, so that the power supply line of the motor is connected. If the cover is opened, the first plug-in terminal and the second plug-in terminal are separated, so that the power supply line of the motor is disconnected; at this time, due to the existence of the pull-up resistor 23, the motor detection circuit 20 always outputs a high-level detection signal, which will prohibit the thyristor 12 from turning on, protecting the safety of the user.

[0101] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0102] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0103] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0104] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0105] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0106] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A motor control detection circuit for a mixer, characterized in that: It comprises a motor control circuit (10) and a motor detection circuit (20); The output end of the motor control circuit (10) is connected to the input end of the motor detection circuit (20) and is used to output a control current to the motor and the motor detection circuit (20), and the motor operates under the control current; the control current is alternating current; The motor detection circuit (20) is used to detect the control current and generate a corresponding detection signal; if the proportion of high levels in the detection signal does not meet a preset condition, it is confirmed that water seepage exists in the motor, and the motor control circuit (10) stops outputting the control current.

2. The motor control detection circuit of the mixer according to claim 1, characterized in that: The motor detection circuit (20) comprises a voltage dividing module (21), a switch module (22) and a pull-up resistor (23); The voltage dividing module (21) is respectively connected to the output end of the motor control circuit (10) and the control end of the switch module (22), and is used to reduce the voltage of the control current; The output end of the switch module (22) is grounded, and the input end of the switch module (22) is connected to an external power supply via the pull-up resistor (23); The switch module (22) is in an on state or an off state under the control of the reduced-voltage control current, and outputs a corresponding detection signal.

3. The motor control detection circuit of the mixer according to claim 2, characterized in that: The voltage dividing module (21) comprises a resistor R1, a resistor R2 and a resistor R3; One end of the resistor R1 is connected to the output end of the motor control circuit (10), and the other end of the resistor R1 is connected to one end of the resistor R2; The other end of the resistor R2 is connected to one end of the resistor R3 and the control end of the switch module (22) respectively; The other end of the resistor R3 is grounded.

4. The motor control detection circuit of the mixer according to claim 2, characterized in that: The switch module (22) is one of a triode Q1 and a field effect transistor.

5. The motor control detection circuit of the mixer according to claim 2, characterized in that: The motor detection circuit (20) further includes a first filtering module (24) and a protection module (25); The input end of the first filter module (24) is connected to the output end of the motor control circuit (10), and the output end of the first filter module (24) is connected to the input end of the voltage divider module (21); the first filter module (24) is used to filter the control current; The input end of the protection module (25) is respectively connected to the input end of the switch module (22) and the pull-up resistor (23), and the output end of the protection module (25) outputs the detection signal; the protection module (25) is used to protect the motor detection circuit (20).

6. The motor control detection circuit of the mixer according to claim 2, characterized in that: The motor detection circuit (20) further includes a second filtering module (26); The input end of the second filter module (26) is respectively connected to the output end of the voltage divider module (21) and the control end of the switch module (22); the output end of the second filter module (26) is grounded; The second filtering module (26) is used to filter the control current after voltage reduction.

7. The motor control detection circuit of a mixer according to claim 1, characterized in that: The motor control circuit (10) comprises a motor control module (11) and a thyristor (12); The input end of the motor control module (11) is connected to the neutral line; the output end of the motor control module (11) is connected to the input end of the thyristor (12); The output end of the thyristor (12) is connected to the output end of the motor; the input end of the motor is connected to the live wire; the feedback end of the thyristor (12) receives a control signal; the thyristor (12) outputs the control current under the control of the control signal; the control signal is determined by the detection signal.

8. The motor control detection circuit of a mixer according to claim 1, characterized in that: The preset condition is that the duty cycle of the high level in one cycle is 47.5% to 52.5%.

9. An electric cooking appliance, characterized in that: It comprises a cover, a body and a motor control detection circuit as claimed in any one of claims 1 to 8; A motor is arranged in the machine cover; a stirring member is connected to the motor; The motor control detection circuit is connected to the motor and is used to control the operation of the motor.

10. The electric cooking appliance according to claim 9, characterized in that: The first plug-in terminal of the motor is arranged in the cover, and the second plug-in terminal of the motor is arranged in the body; when the cover is closed, the first plug-in terminal contacts the second plug-in terminal.

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