CN205430051U - Mixer and be used for electromagnetic interference suppressing circuit of mixer - Google Patents

Abstract

The utility model discloses a mixer and be used for electromagnetic interference suppressing circuit of mixer, the circuit includes: the connection is at the alternating current power supply's of input zero line and first the suppressions unit between the live wire, and it is used for restraining the surge interference that comes from alternating current power supply, first wave filter, its first input end and second input connect in parallel at the both ends of first suppression unit, first wave filter through restrain differential mode interference and common mode interference with the suppression come from alternating current power supply to the interference of back level circuit with restrain the interference of back level circuit to alternating current power supply, wherein, a back grade circuit includes the motor, the second restraines the unit, and its first end links to each other with the first output of first wave filter, and its second end links to each other with the second output of first wave filter, and the second restraines the third termination ground wire of unit, and the second restraines the unit and is used for restraining common mode interference to restrain the interfering signal who predetermines the frequency channel in disturbance voltage test procedure, thus can to the mixer especially the electromagnetic interference that produces of broken wall machine carry out effectual suppression.

Description

Mixer and electromagnetic interference suppression circuit for mixer

technical field

The utility model relates to the technical field of living electrical appliances, in particular to an electromagnetic interference suppression circuit for a mixer and a mixer with a mixer.

Background technique

The wall breaking machine can use high speed to break the cell wall of plant ingredients to fully release nutrients, which is very popular among consumers. However, because the motor speed of the broken wall machine is very high, the problem of electromagnetic interference is very large. However, related technologies are difficult to solve this problem.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present utility model is to provide an electromagnetic interference suppression circuit for a mixer, which can effectively suppress the electromagnetic interference of the mixer.

Another purpose of the utility model is to provide a mixer.

In order to achieve the above object, the utility model proposes an electromagnetic interference suppression circuit for a mixer on the one hand, including: a first suppression unit, the first suppression unit is connected between the neutral line and the live line of the input AC power supply, The first suppression unit is used to suppress the surge interference from the AC power supply; the first filter, the first input end and the second input end of the first filter are connected in parallel between the two ends of the first suppression unit At the end, the first filter suppresses the interference from the AC power supply to the subsequent stage circuit and suppresses the interference from the subsequent stage circuit to the AC power supply by suppressing differential mode interference and common mode interference; the second suppression unit, The first terminal of the second suppression unit is connected to the first output terminal of the first filter, the second terminal of the second suppression unit is connected to the second output terminal of the first filter, and the The third terminal of the second suppression unit is grounded, and the second suppression unit is used to suppress the common-mode interference, and suppress the interference signal in the preset frequency band during the disturbance voltage test.

According to the electromagnetic interference suppression circuit for the mixer proposed by the utility model, the surge interference from the AC power supply is suppressed by the first suppression unit, and the differential mode interference and common mode interference are suppressed by the first filter to suppress the impact of the AC power supply on the subsequent stage. The interference of the circuit and the suppression of the interference of the subsequent circuit to the AC power supply, and the suppression of the common mode interference through the second suppression unit, and the suppression of the interference signal of the preset frequency band during the disturbance voltage test, so that the mixer, especially the broken wall The electromagnetic interference generated by the machine can be effectively suppressed.

Further, the first filter is a π-type filter.

Specifically, the π-type filter includes: a first capacitor connected in parallel to both ends of the first suppression unit; a first common mode inductor, the first end of the first common mode inductor connected to One end of the first capacitor is connected, the second end of the first common mode inductor is connected to the other end of the first capacitor; the second capacitor, one end of the second capacitor is connected to the first common mode inductor The third terminal of the second capacitor is connected to the fourth terminal of the first common mode inductor.

Wherein, both the first capacitor and the second capacitor are X capacitors.

Further, the second suppression unit includes: a third capacitor and a fourth capacitor connected in series, with a first node between the third capacitor and the fourth capacitor connected in series; a second common mode inductor, the second common mode The first end of the mode inductor is connected to the second end and then connected to the first node, and the third end of the second common mode inductor is connected to the fourth end and then connected to the ground.

Wherein, both the third capacitor and the fourth capacitor are Y capacitors.

Further, the first suppression unit is a piezoresistor.

Further, the preset frequency band is 150KHz-30MHz.

Further, the electromagnetic interference suppression circuit is arranged at the power line port of the mixer.

Further, the electromagnetic interference of the mixer is generated by the switching power supply module, the thyristor module and the motor in the subsequent circuit.

In order to achieve the above purpose, another aspect of the utility model proposes a mixer, including the electromagnetic interference suppression circuit for the mixer.

According to the mixer proposed by the utility model, through the above-mentioned electromagnetic interference suppression circuit for the mixer, the surge interference from the AC power supply can be suppressed, and the interference of the AC power supply to the subsequent stage circuit and the interference of the latter stage circuit to the AC power supply can be suppressed, And suppress the common mode interference, and suppress the interference signal of the preset frequency band during the disturbance voltage test, so as to effectively suppress the electromagnetic interference generated by the mixer, especially the wall breaker.

Description of drawings

Fig. 1 is a schematic block diagram of an electromagnetic interference suppression circuit for a mixer according to an embodiment of the present invention;

Fig. 2 is a schematic circuit diagram of an electromagnetic interference suppression circuit for a mixer according to an embodiment of the present invention;

Fig. 3 is a schematic block diagram of an agitator according to an embodiment of the present invention; and

Fig. 4 is a schematic block diagram of a mixer according to another embodiment of the present invention.

Reference signs:

An electromagnetic interference suppression circuit 100 for a mixer, an alternating current power supply AC, a first suppression unit 10, a first filter 20 and a second suppression unit 30;

Varistor ZNR, first capacitor C1, first common-mode inductor TR1, second capacitor C2, third capacitor C3, fourth capacitor C4, and second common-mode inductor TR2;

The motor 200, the thyristor module 300, the switching power supply module 400, the control chip 500, the heating circuit 600 and the thyristor module 700 of the heating circuit.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The electromagnetic interference suppression circuit for a mixer proposed by the embodiment of the present invention and the mixer with it will be described below with reference to the accompanying drawings. According to an embodiment of the present utility model, the mixer may preferably be a wall breaker.

FIG. 1 is a schematic block diagram of an electromagnetic interference suppression circuit for a mixer according to an embodiment of the present invention. As shown in FIG. 1 , the electromagnetic interference suppression circuit 100 for a mixer includes: a first suppression unit 10 , a first filter 20 and a second suppression unit 30 .

Wherein, the first suppressing unit 10 is connected between the neutral line N and the live wire L of the input AC power supply AC such as commercial power, and the first suppressing unit 10 is used to suppress surge interference from the alternating current power supply AC; the first filter 20 The first input terminal and the second input terminal are connected in parallel at both ends of the first suppression unit 10, and the first filter 20 suppresses the interference from the AC power supply AC to the subsequent stage circuit by suppressing the differential mode interference and the common mode interference and suppresses the subsequent stage circuit The interference of the circuit to the AC power supply; the first end of the second suppression unit 30 is connected to the first output end of the first filter 20, and the second end of the second suppression unit 30 is connected to the second output end of the first filter 20 connected, the third end of the second suppression unit 30 is grounded, and the second suppression unit 30 is used to suppress common-mode interference, and to suppress interference signals in a preset frequency band during the disturbance voltage test.

Moreover, the first terminal of the second suppression unit 30 serves as the second output terminal OUT2 of the electromagnetic interference suppression circuit 100 , and the second terminal of the second suppression unit 30 serves as the first output terminal OUT1 of the electromagnetic interference suppression circuit 100 .

According to an embodiment of the present invention, as shown in Figure 2, the first suppression unit 10 can be a varistor ZNR, that is, one end of the varistor ZNR is connected to the neutral line N of the AC power supply AC, and the varistor ZNR The other end is connected to the live line L of the AC power supply. Among them, the varistor ZNR is used to suppress the lightning surge interference from the AC power supply such as the mains, and effectively protect the subsequent circuit.

According to a specific example of the present invention, the nominal voltage range of the piezoresistor ZNR may be 270V-560V, preferably 560V.

According to an embodiment of the present invention, as shown in FIG. 2 , the first filter 20 is a π-type filter. Specifically, as shown in FIG. 2 , the π-type filter includes: a first capacitor C1 , a first common-mode inductor TR1 and a second capacitor C2 .

Wherein, the first capacitor C1 is connected in parallel with both ends of the first suppression unit 10, that is, one end of the first capacitor C1 is connected with one end of the piezoresistor ZNR, and the other end of the first capacitor C1 is connected with the other end of the piezoresistor ZNR. connected; the first end of the first common mode inductor TR1 is connected to one end of the first capacitor C1, the second end of the first common mode inductor TR1 is connected to the other end of the first capacitor C1; one end of the second capacitor C2 is connected to the first The third end of the common mode inductor TR1 is connected, and the other end of the second capacitor C2 is connected to the fourth end of the first common mode inductor TR1.

That is to say, a π-type filter is composed of the first capacitor C1, the first common-mode inductor TR1, and the second capacitor C2. The first capacitor C1 and the second capacitor C2 are mainly used to suppress differential-mode interference, and the first common-mode inductor TR1 It is mainly used to suppress common-mode interference, and the π-type filter can also suppress the interference of the AC power supply AC such as the mains to the subsequent circuit, and at the same time suppress the interference of the subsequent circuit to the AC power AC such as the mains.

According to a specific example of the present invention, both the first capacitor C1 and the second capacitor C2 are X capacitors. More specifically, the capacitance of the first capacitor C1 and the second capacitor C2 may range from 0.1uF to 2uF, preferably 1uF.

According to an embodiment of the present invention, as shown in FIG. 2 , the second suppression unit 30 includes: a third capacitor C3 , a fourth capacitor C4 and a second common mode inductor TR2 .

Wherein, the third capacitor C3 and the fourth capacitor C4 are connected in series, one end of the third capacitor C3 is connected to one end of the second capacitor C2, the other end of the third capacitor C3 is connected to one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 One end is connected to the other end of the second capacitor C2, and there is a first node between the third capacitor C3 and the fourth capacitor C4 in series; the first end of the second common mode inductor TR2 is connected to the second end and then connected to the first node , the third end of the second common mode inductor TR2 is connected to the fourth end and then connected to the ground line G.

That is to say, the third capacitor C3, the fourth capacitor C4 and the second common mode inductor TR2 are used to suppress the common mode interference in the circuit, and are connected at the first node between the third capacitor C3 and the fourth capacitor C4 The second common mode inductor TR2 can have a very good suppression effect on the preset frequency band in the disturbance voltage test experiment.

In an embodiment of the present invention, the preset frequency band may be 150KHz-30MHz.

According to a specific example of the present invention, both the third capacitor C3 and the fourth capacitor C4 are Y capacitors. More specifically, the capacitance of the third capacitor C3 and the fourth capacitor C4 may range from 100nF to 4.7mF, preferably 470nF. The inductance range of the first common-mode inductor TR1 and the second common-mode inductor TR2 may be 1 mH˜20 mH, preferably 10 mH.

As mentioned above, the varistor ZNR is first connected in series between the neutral line N and the live line L, so as to suppress the lightning surge interference and protect the components in the subsequent stage circuit. Secondly, the first X capacitor C1, The first common mode inductor TR1 and the second X capacitor C2, C1, TR1 and C2 form a π-type filter, which can effectively filter out the interference from the mains and the interference from the mixer itself to the outside world, and finally from the neutral line N The first Y capacitor C3, the second Y capacitor C4, and the second common mode inductor TR2 are connected in series with the live wire L to the ground wire G, so that the common mode interference in the circuit can be effectively filtered.

Further, according to an embodiment of the present invention, the electromagnetic interference suppression circuit 100 can be arranged at the power line port of the blender.

Specifically, as shown in FIG. 3 and FIG. 4 , the mixer may include: an electromagnetic interference suppression circuit 100 , a motor 200 , a thyristor module 300 , a switching power supply module 400 and a control chip 500 .

Wherein, the first input terminal of the electromagnetic interference suppression circuit 100 is connected to the neutral line N of the AC power supply AC, the second input terminal of the electromagnetic interference suppression circuit 100 is connected to the live line L of the AC power supply AC, and the two ends of the piezoresistor ZNR correspond to It is the first input end and the second input end of the electromagnetic interference suppression circuit 100; one end of the motor 200 is connected with the second output end OUT2 of the electromagnetic interference suppression circuit 100, and one end of the third capacitor C3 is the first input end of the electromagnetic interference suppression circuit 100 Two output terminals OUT2; the first terminal of the thyristor module 300 is connected to the other end of the motor 200, the second terminal of the thyristor module 300 is connected to the first output terminal OUT1 of the electromagnetic interference suppression circuit 100, and the fourth capacitor C4 The other end is the first output terminal OUT1 of the electromagnetic interference suppression circuit 100; the control chip 500 is connected to the control terminal of the thyristor module 300, and the control chip 500 controls the motor 200 through the thyristor module 300; the first output terminal of the switching power supply module 400 One input end is respectively connected with one end of the motor 200 and the second output end OUT2 of the electromagnetic interference suppression circuit 100, and the second input end of the switching power supply module 400 is connected with the second end of the thyristor module 300 and the second end of the electromagnetic interference suppression circuit 100 respectively. The first output terminal OUT1 is connected, and the output terminal of the switching power supply module 400 is connected with the control chip 500 .

In this way, after the electromagnetic interference suppression by the electromagnetic interference suppression circuit 100, the alternating current provided by the alternating current power supply AC is provided to the motor 200, the thyristor module 300 and the switching power supply module 400 to supply power for them, and the switching power supply module 400 suppresses the electromagnetic interference The AC power is converted into a preset DC power source to power the control chip 500 .

As shown in FIG. 4 , the mixer may further include: a heating circuit 600 and a thyristor module 700 of the heating circuit. Wherein, one end of the heating circuit 600 is connected with the second output terminal OUT2 of the electromagnetic interference suppression circuit 100; one end of the thyristor module 700 of the heating circuit is connected with the other end of the heating circuit 600, and the other end of the thyristor module 700 of the heating circuit is connected. One end is connected to the first output terminal OUT1 of the electromagnetic interference suppression circuit 100, and the control chip 500 is also connected to the control terminal of the thyristor module 700 of the heating circuit, and the control chip 500 controls the heating circuit through the thyristor module 700 of the heating circuit 600.

According to an embodiment of the present invention, the electromagnetic interference of the mixer is generated by the switching power supply module 400 , the thyristor module 300 and the motor 200 in the subsequent circuit. The electromagnetic interference of the mixer can also be generated by the heating circuit 600 and the thyristor module 700 of the heating circuit in the subsequent circuit.

Specifically, the electromagnetic interference of the mixer is mainly generated by the switching power supply module 400, the thyristor module 300 (and 700) and the motor 200, wherein the interference generated by the motor 200 is the most serious, so the electromagnetic interference suppression circuit 100 is arranged at the power line port , can achieve effective suppression.

To sum up, according to the electromagnetic interference suppression circuit for the mixer proposed by the embodiment of the utility model, the surge interference from the AC power supply is suppressed through the first suppression unit 10, and the differential mode interference and common mode interference are suppressed through the first filter 20 In order to suppress the interference of the AC power supply to the subsequent stage circuit and the interference of the subsequent stage circuit to the AC power supply, and suppress the common mode interference through the second suppression unit 30, and suppress the interference signal of the preset frequency band during the disturbance voltage test process, Therefore, the electromagnetic interference generated by the mixer, especially the wall breaker, can be effectively suppressed.

Finally, the embodiment of the utility model also proposes a mixer, including the above-mentioned electromagnetic interference suppression circuit for the mixer.

According to the mixer proposed by the embodiment of the utility model, through the above-mentioned electromagnetic interference suppression circuit for the mixer, the surge interference from the AC power supply can be suppressed, and the interference of the AC power supply to the subsequent stage circuit and the interference of the subsequent stage circuit to the AC power supply can be suppressed. Interference, and suppress common mode interference, and suppress the interference signal of the preset frequency band during the disturbance voltage test, so as to effectively suppress the electromagnetic interference generated by the mixer, especially the wall breaker.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (11)

1. An electromagnetic interference suppression circuit for mixer, characterized in that, comprising: A first suppression unit, the first suppression unit is connected between the neutral line and the live line of the input AC power supply, and the first suppression unit is used to suppress surge interference from the AC power supply; The first filter, the first input terminal and the second input terminal of the first filter are connected in parallel at both ends of the first suppression unit, and the first filter suppresses differential mode interference and common mode interference to suppress The interference of the AC power supply to the subsequent stage circuit and the suppression of the interference of the subsequent stage circuit to the AC power supply, wherein the subsequent stage circuit includes a motor; A second suppression unit, the first end of the second suppression unit is connected to the first output end of the first filter, the second end of the second suppression unit is connected to the second output of the first filter The terminals are connected, the third terminal of the second suppression unit is grounded, and the second suppression unit is used to suppress the common-mode interference, and suppress the interference signal in the preset frequency band during the disturbance voltage test. 2. The electromagnetic interference suppression circuit for a mixer according to claim 1, wherein the first filter is a π-type filter. 3. The electromagnetic interference suppression circuit for mixer as claimed in claim 2, wherein said π-type filter comprises: a first capacitor, the first capacitor is connected in parallel to both ends of the first suppression unit; a first common-mode inductor, wherein a first end of the first common-mode inductor is connected to one end of the first capacitor, and a second end of the first common-mode inductor is connected to the other end of the first capacitor; A second capacitor, one end of the second capacitor is connected to the third end of the first common-mode inductor, and the other end of the second capacitor is connected to the fourth end of the first common-mode inductor. 4. The electromagnetic interference suppression circuit for a mixer according to claim 3, wherein both the first capacitor and the second capacitor are X capacitors. 5. The electromagnetic interference suppression circuit for a mixer according to any one of claims 1-4, wherein the second suppression unit comprises: a third capacitor and a fourth capacitor connected in series, with a first node between the third capacitor and the fourth capacitor connected in series; The second common mode inductor, the first end of the second common mode inductor is connected to the second end and then connected to the first node, the third end of the second common mode inductor is connected to the fourth end and then connected to the connected to ground. 6. The electromagnetic interference suppression circuit for a mixer according to claim 5, wherein both the third capacitor and the fourth capacitor are Y capacitors. 7. The electromagnetic interference suppression circuit for a mixer according to claim 1, wherein the first suppression unit is a piezoresistor. 8. The electromagnetic interference suppression circuit for a mixer according to claim 1, wherein the preset frequency band is 150KHz-30MHz. 9. The electromagnetic interference suppression circuit for a mixer according to claim 1, characterized in that, the electromagnetic interference suppression circuit is arranged at a power line port of the mixer. 10. The electromagnetic interference suppression circuit for a mixer according to claim 1, wherein the electromagnetic interference of the mixer is generated by a switching power supply module, a thyristor module and a motor in the subsequent circuit. 11. A mixer, characterized in that it comprises the electromagnetic interference suppression circuit for a mixer according to any one of claims 1-10.