CN205353651U - Soybean milk machine control circuit - Google Patents
Soybean milk machine control circuit Download PDFInfo
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- CN205353651U CN205353651U CN201520967872.5U CN201520967872U CN205353651U CN 205353651 U CN205353651 U CN 205353651U CN 201520967872 U CN201520967872 U CN 201520967872U CN 205353651 U CN205353651 U CN 205353651U
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- circuit
- relay
- detection port
- time delay
- comparator
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- 239000008267 milk Substances 0.000 title claims abstract description 25
- 210000004080 milk Anatomy 0.000 title claims abstract description 25
- 235000013336 milk Nutrition 0.000 title claims abstract description 25
- 235000010469 Glycine max Nutrition 0.000 title claims abstract description 24
- 244000068988 Glycine max Species 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 107
- 230000002093 peripheral effect Effects 0.000 claims abstract description 19
- 235000013305 food Nutrition 0.000 claims abstract description 5
- 230000001960 triggered effect Effects 0.000 claims description 5
- 230000002459 sustained effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000004821 Contact adhesive Substances 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Abstract
The utility model relates to a soybean milk machine control circuit, it is including the load, the drive that are used for carrying on the food processing the load circuit of load work, control chip, the switch of drive load is the relay, a serial communication port, integrated zero cross detection circuit of this control chip and relay time delay detection circuitry, delay time when two circuit detected signals of accessible detect relay switch, and according to the switching time of corresponding switch delay time adjustment trigger control relay, in -process in function program work, the time of relay switch trigger control is adjusted according to the delay time who discerns, ensure that the relay triggers at the power zero crossing, the life -span that the relay used has been prolonged to a certain extent, the electromagnetic interference that switch motion brought has also been reduced simultaneously. Through integrated corresponding private circuit on control chip, improved circuit's the degree of integrating is through reducing the reliability that peripheral device comes raising circuitry.
Description
Technical field
This utility model relates to a kind of food processor, particularly relates to the control circuit of a kind of soy bean milk making machine.
Background technology
In small household appliances industry, particularly soy bean milk making machine industry, by relay as switching device control heating, motor very general.Due in work process, the load current that relay controls is bigger, cause that it is in switching process, can strike sparks in contact, arcing, one affects relay life, and two to exist contact extremely, cause relay not according to set such normal switch, it is easy to occur overflow slurry, bean milk boil not yet done, pulverize the faults such as bad.
In order to reduce sparking or the arcing of contact in relay switch process, existing design is typically all the zero cross signal by detecting alternating current power supply, goes trigger relay to switch at zero crossing, the sparking of maximized reduction relay contact and arcing.But this type of scheme exists a defect, because his premise is requirement relay contact switch, not have time delay or time delay be all identical, and will not produce change along with service life, but actually, on market, each relay is different, and contact is As time goes on, it may occur that change.
Have scheme to be proposed by two-way zero crossing circuitry at present to detect to the time delay realizing relay switch, data are detected by time delay, by adjusting the control realizing relay opportunity opening, closing relay, owing to current zero crossing circuitry is all realized by peripheral discrete devices, one to carry out peripheral circuit device quantity many, two carry out system reliability reduces, and failure risk increases；Simultaneously that the area of wiring board and influence of arrangement is all very big, apply underaction.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of cost is low, the control circuit of reliable soy bean milk making machine.
In order to solve above technical problem, a kind of soy bean milk making machine control circuit, described control circuit includes the load for carrying out food processing, drive the load circuit of described loaded work piece, control chip, described load circuit includes switch, described switch is relay, it is characterized in that, described control chip has zero passage detection port, relay time delay detection port, described zero passage detection Port detecting civil power zero cross signal, described relay time delay detection Port detecting relay switch postpones signal, described control chip postpones relay switch time delay described in detection Port detecting by described zero passage detection port and described relay, and the switch time controlling described relay is triggered according to corresponding switching delay time adjustment.
Preferably, described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 1, basis point volt circuit 1 and comparator 1, the input of described input bleeder circuit 1 terminates described zero passage detection port, the output of described input bleeder circuit 1 terminates the in-phase end of described comparator 1, and the outfan of described basis point volt circuit 1 connects the end of oppisite phase of described comparator 1.
Preferably, described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes diode D1, input bleeder circuit 2, basis point volt circuit 2 and comparator 2, described diode anode D1 connects described relay time delay detection port, negative electrode connects the input of described input bleeder circuit 2, the output of described input bleeder circuit 2 terminates the in-phase end of described comparator 2, the outfan of described basis point volt circuit 2 connects the end of oppisite phase of described comparator 2.
Preferably, described zero passage detection port is electrically connected to zero-power line, and described relay postpones detection port and electrically connects between described relay and described load.
Preferably, the VCC that described control chip is powered is electrically connected to power firestreak, and described relay stationary contact is electrically connected to power firestreak, and described relay movable contact is electrically connected to load.
Preferably, described control chip includes driving control circuit, described driving control circuit drives control port to be connected with peripheral circuit by described, described driving control circuit includes high-power driving switch, drives controller and the sustained diode 2 of described switch, and described driving control circuit drives described relay.
Preferably, described driving controls port electrical connection and described relay coil one end pin, and the described relay coil other end electrically connects and described relay power supply.
Preferably, described zero passage detection port is electrically connected to diode D3 negative electrode, and described diode D3 anode is electrically connected to power firestreak, and described relay postpones detection port and electrically connects between described relay and described load.
Preferably, described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 3, basis point volt circuit 3 and comparator 3, the input of described input bleeder circuit 3 terminates described zero passage detection port, the output of described input bleeder circuit 3 terminates the in-phase end of described comparator 3, and the outfan of described basis point volt circuit 3 connects the end of oppisite phase of described comparator 3；
Preferably, described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes input bleeder circuit 4, basis point volt circuit 4 and comparator 4, the input of described input bleeder circuit 4 terminates described relay time delay detection port, the output of described input bleeder circuit 4 terminates the in-phase end of described comparator 4, and the outfan of described basis point volt circuit 4 connects the end of oppisite phase of described comparator 4.
Preferably, described zero passage detection port is electrically connected to power firestreak, and described relay postpones detection port and electrically connects between described relay and described load.
Preferably, described zero passage detection port is electrically connected to zero-power line, and described relay postpones detection port electrical connection diode D4 negative electrode, and described diode D4 anode is electrically connected between described relay and described load.
By arranging relay delay detection circuit, relay is utilized to play, when turning off from unlatching, the principle that waveform is different, thus automatically identify relay contact switch time time delay, in the process of function program work, the time controlled is triggered according to adjusting relay switch the time delay identified, guarantee that relay triggers at power supply zero crossing, extend the life-span that relay uses to a certain extent, also reduce the electromagnetic interference that switch motion brings simultaneously.
By corresponding special circuit integrated on control chip, improve the integration degree of circuit, promote the reliability of circuit by reducing peripheral components.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the circuit diagram of a kind of soy bean milk making machine control circuit embodiment 1 of this utility model；
Fig. 2 is the zero cross detection circuit schematic diagram of a kind of soy bean milk making machine control circuit embodiment 1 of this utility model；
Fig. 3 is the relay delay detection circuit schematic diagram of a kind of soy bean milk making machine control circuit embodiment 1 of this utility model；
Fig. 4 is the driving control circuit schematic diagram of a kind of soy bean milk making machine control circuit embodiment 1 of this utility model；
Fig. 5 is the circuit diagram of a kind of soy bean milk making machine control circuit embodiment 2 of this utility model；
Fig. 6 is the circuit diagram of a kind of soy bean milk making machine control circuit embodiment 3 of this utility model.
Detailed description of the invention
Embodiment 1:
This utility model one soy bean milk making machine control circuit, described control circuit includes the load for carrying out food processing, drives the load circuit of described loaded work piece, control chip, described load circuit includes switch, wherein, described switch is relay, described control chip has zero passage detection port, relay time delay detection port, zero cross detection circuit, relay time delay testing circuit are internally integrated it, described control chip detection described relay switch time delay, and the switch time controlling described relay is triggered according to corresponding switching delay time adjustment.
As shown in Figure 1, in the present embodiment, described control chip MCU includes zero passage detection port ZERO, relay postpones detection port DELAY and drives control port I/O, described load RG connects power supply by load circuit, described control chip connects load circuit, described control chip MCU controls port I/O driving described load RG work by described driving, between described zero passage detection port ZERO electric connection of power supply and load circuit, described relay postpones detection port DELAY and electrically connects between load circuit and load RG, described driving controls port I/O electrical connection and load circuit.
In the present embodiment, described zero passage detection port ZERO is electrically connected to zero-power line N, and described relay postpones detection port DELAY and electrically connects between described relay K and described load RG.The VCC that described control chip MCU powers is electrically connected to power firestreak L, and described relay K stationary contact is electrically connected to power firestreak L, and described relay K movable contact is electrically connected to load RG.
In the present embodiment, described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 1, basis point volt circuit 1 and comparator 1, the input of described input bleeder circuit 1 terminates described zero passage detection port, the output of described input bleeder circuit 1 terminates the in-phase end of described comparator 1, and the outfan of described basis point volt circuit 1 connects the end of oppisite phase of described comparator 1.
Concrete as in figure 2 it is shown, resistance R1 and resistance R2 forms basis point volt circuit, resistance R3 and resistance R4 composition output bleeder circuit, zero passage detection port ZERO connects the in-phase end of comparator U1 by resistance R3, and the in-phase end of comparator U1 passes through resistance R4 ground connection.VCC forms bleeder circuit by resistance R1 and resistance R2 and ground, and the voltage after dividing potential drop inputs to the end of oppisite phase of comparator U1.When alternating current power supply positive half-wave inputs, voltage is through bleeder circuit 1 input comparator 1 positive, and basis point volt circuit 1 provides reference voltage to comparator 1, now the output voltage of bleeder circuit 1 is higher than reference voltage, comparator 1 exports high level, when the negative half-wave input of alternating current power supply, comparator 1 output low level.The control chip low and high level by detection comparator 1 outfan, identifies alternating current power supply zero crossing.
In the present embodiment, described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes diode D1, input bleeder circuit 2, basis point volt circuit 2 and comparator 2, described diode anode D1 connects described relay time delay detection port, negative electrode connects the input of described input bleeder circuit 2, the output of described input bleeder circuit 2 terminates the in-phase end of described comparator 2, the outfan of described basis point volt circuit 2 connects the end of oppisite phase of described comparator 2.
Specifically as shown in Figure 3, wherein input bleeder circuit 2 is consistent with above-mentioned zero cross detection circuit with the principle of basis point volt circuit, do not repeating one by one at this, and for relay delay detection circuit, connecting at it and be provided with diode D1 between relay delayed port DELAY.
In the present embodiment, described control chip includes driving control circuit, described driving control circuit drives control port to be connected with peripheral circuit by described, described driving control circuit includes high-power driving switch, drives controller and the sustained diode 2 of described switch, and described driving control circuit drives described relay.
In the present embodiment, driving in described control chip controls port and has been internally integrated driving control circuit, described driving control circuit is as shown in Figure 4, switch, drive controller and the sustained diode 2 of described switch including high-power driving, high-power driving switch is metal-oxide-semiconductor, specifically no longer repeats one by one.
In the present embodiment, the VCC that in circuit, control chip is powered is connected on power firestreak loop, and the GND of control chip is as floating.Zero cross detection circuit is from zero line sampled signal, relay time delay testing circuit is electrically connected between relay output end and load, the signal that zero cross detection circuit and relay delay detection circuit detect flows to control chip and carries out signal processing, and the driving of control chip controls the opening and closing of port controlling relay.
Specific works is as follows:
When relay disconnects, the N end of alternating current power supply is connected to the relay time delay detection port of described control chip by load, relay time delay detection port input is followed by internal body diodes D1 anode, its voltage is followed by the positive of comparator 2 through bleeder circuit 2 dividing potential drop, when alternating current power supply is positive half-wave, and basis point volt circuit 2 provides reference voltage to the negative of comparator 2, now the output voltage of bleeder circuit 2 is higher than reference voltage, comparator 2 exports high level, when the negative half-wave input of alternating current power supply, comparator 2 output low level.The control chip low and high level by detection comparator 2 outfan, identifies alternating current power supply zero crossing.
During relay conducting, loaded work piece, now, diode D1 is relative to being connected to VCC, having hung VCC on the live wire L of alternating current power supply, what relay delay detection circuit bleeder circuit 2 connect is floating ground, now, the voltage of bleeder circuit 2 output is always below the output valve of benchmark branch pressure voltage 2, comparator 2 output low level signal always.
By the unlike signal of this comparator 2 outfan different time sections, control chip gathers power supply zero passage detection signal and relay time delay detection signal, by identifying that rising edge and trailing edge realize the detection of relay switch delay time.
Owing to when relay turns on being the contact adhesive of relay, and the shutoff of relay is that contact is with flicking under point, therefore relay open postpone and turn-off delay time not etc., therefore, in the present embodiment, the detection of described relay switch time delay, detects including relay trunon delay time, and the detection of relay turn-off delay time.
Embodiment 2:
The present embodiment and above-described embodiment 1 are distinctive in that, as shown in Figure 5, described zero passage detection port ZERO is electrically connected to diode D3 negative electrode, and described diode D3 anode is electrically connected to power firestreak L, and described relay postpones detection port DELAY and electrically connects between described relay K and described load RG.Specific works principle is consistent with above-described embodiment, and this is no longer going to repeat them.
Embodiment 3:
The present embodiment and above-described embodiment 3 are distinctive in that, in the present embodiment, as shown in Figure 6, described zero passage detection port is electrically connected to zero-power line, described relay postpones detection port electrical connection diode D4 negative electrode, and described diode D4 anode is electrically connected between described relay and described load.Specific works principle is consistent with above-described embodiment, and this is no longer going to repeat them.
Embodiment 3:
The present embodiment and above-described embodiment 1 are distinctive in that, in the present embodiment, described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 3, basis point volt circuit 3 and comparator 3, the input of described input bleeder circuit 3 terminates described zero passage detection port, the output of described input bleeder circuit 3 terminates the in-phase end of described comparator 3, and the outfan of described basis point volt circuit 3 connects the end of oppisite phase of described comparator 3；
Described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes input bleeder circuit 4, basis point volt circuit 4 and comparator 4, the input of described input bleeder circuit 4 terminates described relay time delay detection port, the output of described input bleeder circuit 4 terminates the in-phase end of described comparator 4, the outfan of described basis point volt circuit 4 connects the end of oppisite phase of described comparator 4, specific works principle is consistent with above-described embodiment, this is no longer going to repeat them.
By arranging relay delay detection circuit, relay is utilized to play, when turning off from unlatching, the principle that waveform is different, thus automatically identify relay contact switch time time delay, in the process of function program work, the time controlled is triggered according to adjusting relay switch the time delay identified, guarantee that relay triggers at power supply zero crossing, extend the life-span that relay uses to a certain extent, also reduce the electromagnetic interference that switch motion brings simultaneously.
Relay is opened delay and turn-off delay detects respectively, enable to the control chip state to relay carry out deeply understanding thus could more intelligence be controlled, and it is different from the required active force overcome when disconnecting in adhesive to avoid relay contact, and it causes that time delay different.And before function program starts, all carry out the detection of time delay, decrease the loss impact for time delay.
It is emphasized that protection domain of the present utility model is including but not limited to above-mentioned detailed description of the invention.It should be pointed out that, for a person skilled in the art, under the premise without departing from this utility model principle, it is also possible to make some deformation and improvement, these also should be considered to belong to protection domain of the present utility model.
Claims (10)
1. a soy bean milk making machine control circuit, described control circuit includes the load for carrying out food processing, drive the load circuit of described loaded work piece, control chip, described load circuit includes switch, described switch is relay, it is characterized in that, described control chip has zero passage detection port, relay time delay detection port, described zero passage detection Port detecting civil power zero cross signal, described relay time delay detection Port detecting relay switch postpones signal, described control chip postpones relay switch time delay described in detection Port detecting by described zero passage detection port and described relay, and the switch time controlling described relay is triggered according to corresponding switching delay time adjustment.
2. soy bean milk making machine control circuit according to claim 1, it is characterised in that
Described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 1, basis point volt circuit 1 and comparator 1, the input of described input bleeder circuit 1 terminates described zero passage detection port, the output of described input bleeder circuit 1 terminates the in-phase end of described comparator 1, and the outfan of described basis point volt circuit 1 connects the end of oppisite phase of described comparator 1；
Described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes diode D1, input bleeder circuit 2, basis point volt circuit 2 and comparator 2, described diode anode D1 connects described relay time delay detection port, negative electrode connects the input of described input bleeder circuit 2, the output of described input bleeder circuit 2 terminates the in-phase end of described comparator 2, the outfan of described basis point volt circuit 2 connects the end of oppisite phase of described comparator 2.
3. soy bean milk making machine control circuit according to claim 2, it is characterised in that described zero passage detection port is electrically connected to zero-power line, described relay postpones detection port and electrically connects between described relay and described load.
4. soy bean milk making machine control circuit according to claim 3, it is characterised in that the VCC that described control chip is powered is electrically connected to power firestreak, described relay stationary contact is electrically connected to power firestreak, and described relay movable contact is electrically connected to load.
5. soy bean milk making machine control circuit according to claim 4, it is characterized in that, described control chip includes driving control circuit, described driving control circuit drives control port to be connected with peripheral circuit by described, described driving control circuit includes high-power driving switch, drives controller and the sustained diode 2 of described switch, and described driving control circuit drives described relay.
6. soy bean milk making machine control circuit according to claim 5, it is characterised in that described driving controls port electrical connection and described relay coil one end pin, the electrical connection of the described relay coil other end and described relay power supply.
7. soy bean milk making machine control circuit according to claim 2, it is characterized in that, described zero passage detection port is electrically connected to diode D3 negative electrode, and described diode D3 anode is electrically connected to power firestreak, and described relay postpones detection port and electrically connects between described relay and described load.
8. soy bean milk making machine control circuit according to claim 1, it is characterised in that
Described control chip includes zero cross detection circuit, described zero cross detection circuit is connected with peripheral circuit by described zero passage detection port, described zero cross detection circuit includes input bleeder circuit 3, basis point volt circuit 3 and comparator 3, the input of described input bleeder circuit 3 terminates described zero passage detection port, the output of described input bleeder circuit 3 terminates the in-phase end of described comparator 3, and the outfan of described basis point volt circuit 3 connects the end of oppisite phase of described comparator 3；
Described control chip includes relay time delay testing circuit, described relay time delay testing circuit detects port by described relay time delay and is connected with peripheral circuit, described in described relay time delay testing circuit, relay time delay detection port includes input bleeder circuit 4, basis point volt circuit 4 and comparator 4, the input of described input bleeder circuit 4 terminates described relay time delay detection port, the output of described input bleeder circuit 4 terminates the in-phase end of described comparator 4, and the outfan of described basis point volt circuit 4 connects the end of oppisite phase of described comparator 4.
9. soy bean milk making machine control circuit according to claim 8, it is characterised in that described zero passage detection port is electrically connected to power firestreak, described relay postpones detection port and electrically connects between described relay and described load.
10. soy bean milk making machine control circuit according to claim 8, it is characterized in that, described zero passage detection port is electrically connected to zero-power line, and described relay postpones detection port electrical connection diode D4 negative electrode, and described diode D4 anode is electrically connected between described relay and described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967872.5U CN205353651U (en) | 2015-11-30 | 2015-11-30 | Soybean milk machine control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967872.5U CN205353651U (en) | 2015-11-30 | 2015-11-30 | Soybean milk machine control circuit |
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| Publication Number | Publication Date |
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| CN205353651U true CN205353651U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520967872.5U Active CN205353651U (en) | 2015-11-30 | 2015-11-30 | Soybean milk machine control circuit |
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| CN (1) | CN205353651U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653483A (en) * | 2016-12-22 | 2017-05-10 | 惠州Tcl照明电器有限公司 | Alternating current relay zero-cross motion control circuit |
| CN108562851A (en) * | 2018-06-13 | 2018-09-21 | 常州同惠电子股份有限公司 | A kind of switch detection protection circuit |
| CN110459433A (en) * | 2019-08-27 | 2019-11-15 | 九阳股份有限公司 | A kind of relay zero-crossing control method and cooking apparatus |
-
2015
- 2015-11-30 CN CN201520967872.5U patent/CN205353651U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653483A (en) * | 2016-12-22 | 2017-05-10 | 惠州Tcl照明电器有限公司 | Alternating current relay zero-cross motion control circuit |
| CN106653483B (en) * | 2016-12-22 | 2020-07-10 | Tcl华瑞照明科技（惠州）有限公司 | Zero-crossing action control circuit of alternating-current relay |
| CN108562851A (en) * | 2018-06-13 | 2018-09-21 | 常州同惠电子股份有限公司 | A kind of switch detection protection circuit |
| CN110459433A (en) * | 2019-08-27 | 2019-11-15 | 九阳股份有限公司 | A kind of relay zero-crossing control method and cooking apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: 310018 No. 760 Yinhai Street, Xiasha Street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee after: HANGZHOU JIUYANG HOUSEHOLD ELECTRICAL APPLIANCES CO.,LTD. Country or region after: China Address before: 310018, No. 52, No. 22, Poplar Street, Hangzhou economic and Technological Development Zone, Zhejiang Patentee before: HANGZHOU JIUYANG HOUSEHOLD ELECTRICAL APPLIANCES CO.,LTD. Country or region before: China |