CN210326994U - Intelligent purification and stability device - Google Patents
Intelligent purification and stability device Download PDFInfo
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- CN210326994U CN210326994U CN201921632939.4U CN201921632939U CN210326994U CN 210326994 U CN210326994 U CN 210326994U CN 201921632939 U CN201921632939 U CN 201921632939U CN 210326994 U CN210326994 U CN 210326994U
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Abstract
The utility model provides an intelligent purifying and voltage stabilizing device, which comprises at least one path of purifying and voltage stabilizing main loop of a purifying and voltage stabilizing voltage stabilizer for purifying and outputting the input commercial power; the device also comprises a processor and a leakage detection circuit; the leakage detection circuit performs leakage detection on an electric appliance powered by the intelligent purification voltage stabilizer, the output end of a leakage detection result is connected with the processor, and the processor controls the relay in the main loop of the purification voltage stabilizer to realize whether the mains supply is connected or not according to the output result of the leakage detection circuit. The utility model discloses added treater and electric leakage detection circuit in purifying steady electrical apparatus, utilized the treater to realize the protection to equipment according to electric leakage detection circuit's the output condition.
Description
Technical Field
The utility model relates to an electricity safety field, in particular to steady electrical apparatus of intelligence purification.
Background
In the purification voltage-stabilized power supply, a main loop of the purification voltage-stabilized power supply is a sine energy distributor. As shown in figure 1, Kl is a front panel operation control switch which controls the start and stop of the operation of the whole stabilized voltage power supply, and J is a main relay which provides protection for power failure when the stabilized voltage power supply operates abnormally, and has overvoltage, undervoltage, overload or short circuit.
The capacitor C100, the capacitor C200, the capacitor C300 and the inductor Ll00, the inductor L200 and the inductor L300, and the variable impedance "Z" constitute a sinusoidal energy distribution circuit.
The working principle is as follows: the inductor L100 and the inductor L200 are arranged on the same iron core to form a self-coupling transformer, the inductor L200, the capacitor C100 and the capacitor C300 form a pi-type filter, the filter has a large time constant and can filter noise waves in a power supply, and the purifying effect of the alternating current purifying stabilized voltage supply is generated accordingly.
Unstable alternating current is output from a point A, the control loop obtains a time control signal related to the input and output voltage levels after sampling the input voltage and the output voltage, the time control signal controls the value of variable impedance and Z, when the input voltage at the point A changes, the voltage at a point B of a voltage division point changes along with the change of Z, so that the voltage at the point C is ensured to be constant, and the voltage stabilizing effect of the alternating current purification voltage-stabilized power supply is generated.
The purifying and voltage stabilizing device can be used for carrying out good purifying and voltage stabilizing protection on the electric equipment, ensuring that a stable purifying power supply is provided for the electric equipment, effectively improving the working environment of the electric equipment and prolonging the service life of the electric equipment.
In an intelligent home, all household appliances need to be effectively protected, but the above purifying voltage stabilizer does not perform electric leakage detection on equipment powered by the purifying voltage stabilizer and cannot perform detection on the comprehensive safety of the appliances powered by the purifying voltage stabilizer.
Disclosure of Invention
The utility model discloses to purifying at present and surely not having the equipment by its power supply to carry out leakage detection, can not make the detection to the comprehensive safety of the electrical apparatus by its power supply. The utility model provides an intelligence purifies steady electrical apparatus suitable for intelligent house.
The utility model discloses a realize that the technical scheme that its technical purpose adopted is: an intelligent purifying and voltage stabilizing device comprises at least one path of purifying and voltage stabilizing main loop for purifying and stabilizing the input commercial power and outputting purified power; the device also comprises a processor and a leakage detection circuit; the leakage detection circuit performs leakage detection on an electric appliance powered by the intelligent purification voltage stabilizer, the output end of a leakage detection result is connected with the processor, and the processor controls the relay in the main loop of the purification voltage stabilizer to realize whether the mains supply is connected or not according to the output result of the leakage detection circuit.
The utility model discloses added treater and electric leakage detection circuit in purifying steady electrical apparatus, utilized the treater to realize the protection to equipment according to electric leakage detection circuit's the output condition.
Further, in the above-mentioned intelligent purification power stabilizer: the leakage detection circuit comprises a mutual inductor, a filter sampling circuit and a leakage protection IC, wherein a live wire and a zero wire of an input commercial power penetrate through a magnetic ring of the mutual inductor at the same time, the filter sampling circuit is used for filtering and sampling an electric signal output by the mutual inductor, and the leakage protection IC is VG54123A in model number; the two output ends of the mutual inductor are respectively connected with two input ends of the filter, the two output ends of the filter are respectively connected with an IN1 pin and an IN2 pin of the leakage protection IC and a VSS pin of the leakage protection IC to be grounded, an NC pin and an OA pin are grounded through a capacitor C37, a DLY pin is grounded through a capacitor C52, and an OS pin outputs a signal whether the leakage exists or not through a filter circuit consisting of the capacitor C51 and a resistor R31.
Further, in the above-mentioned intelligent purification power stabilizer: the filtering sampling circuit comprises a resistor R30, a resistor R28, a resistor R32, a capacitor C35, a capacitor C38 and a capacitor 53; one output end of the transformer is connected with one end of a resistor R30, a resistor R28 and a capacitor C35, the other output end of the transformer is connected with the other end of a resistor 30, and is connected with one end of a capacitor C38 and one end of a resistor R32, the other ends of the capacitor C35 and the capacitor C38 are grounded, and the other ends of the resistor R38 and the resistor R32 are respectively connected with two ends of a capacitor C53 to form two output ends of a sampling filter which are connected with pins IN1 and IN2 of the leakage protection IC.
Further, in the above-mentioned intelligent purification power stabilizer: the transformer further comprises a clamping circuit, the clamping circuit comprises a diode D8 and a diode D9, the diode D8 and the diode D9 are respectively connected between the two output ends of the transformer, the P pole of the diode D8 is connected with the N pole of the diode D9, and the N pole of the diode D8 is connected with the P pole of the diode D9.
Further, in the above-mentioned intelligent purification power stabilizer: the system comprises three main circuits of a purification voltage stabilizer, wherein the main circuits are used for purifying, stabilizing and outputting purified electric power from an input commercial power; the power consumption metering circuit adopts a current detection circuit and a voltage detection circuit to detect the current and the voltage output by the main loop of each path of the purification voltage stabilizer and adopts a power consumption metering chip to meter; the electric quantity metering chip adopts a three-phase multifunctional metering chip U1 with the model number of ATT 7022E; the current detection circuit comprises a transformer L6, a resistor R24, a voltage R25, a capacitor C24, a capacitor C25, a resistor R23, a resistor R26, a capacitor C30 and a capacitor C34, wherein the live wire of the purified output of the circuit passes through a magnetic ring of the circuit; one end of a coil of the transformer L6 is respectively connected with one end of a resistor R24 and one end of a capacitor C24, the other end of the coil is respectively connected with one end of a resistor R25 and one end of a capacitor C25, the other ends of the resistor R24 and the resistor R25 are both grounded, and the other ends of the capacitor C24 and the capacitor C25 are both grounded; one end of a coil of the transformer L6 is also connected with one end of a resistor R23, the other end of the resistor R23 is connected with one end of a capacitor C30 to form a first output end IXP of the current detection circuit, the other end of the coil of the transformer L6 is also connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a capacitor C34 to form a second output end IXN of the current detection circuit, and the other ends of the capacitor C30 and the capacitor C34 are respectively grounded; the voltage detection circuit comprises a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2; the resistor R1 and the resistor R2 are arranged between the live wire and the zero wire of the purified output of the circuit, the capacitor C1 and the capacitor C2 are connected in parallel at two ends of the resistor R2, and the common end connected with the capacitor C1 and the capacitor C2 is grounded; a first output terminal VXP of the voltage detection circuit is formed by a common terminal of the resistor R2 connected with the capacitor C1, a second output terminal VXN of the voltage detection circuit is formed by a common terminal of the resistor R2 connected with the capacitor C2,
the first output end IXP and the second output end IXN of the current detection circuit are respectively connected with the V { 2X-1 } P end and the V { 2X-1 } N end of the three-phase multifunctional metering chip U1; a first output end VXP and a second output end VXN of the voltage detection circuit are respectively connected with a V { 2X } P end and a V { 2X } N end of the three-phase multifunctional metering chip U1; the X-th path purge output is represented by X, which is { 1, 2, 3 }.
Further, in the above-mentioned intelligent purification power stabilizer: the current detection circuit further comprises a clamping circuit, the clamping circuit comprises a diode D6 and a diode D9, the diode D6 and the diode D9 are respectively connected between two output ends of the mutual inductor L6, a P pole of the diode D6 is connected with an N pole of the diode D9, and an N pole of the diode D6 is connected with a P pole of the diode D9.
Further, in the above-mentioned intelligent purification power stabilizer: the temperature sensor is used for detecting the temperature of each path of the main loop of the purification voltage stabilizer, and the output of the analog signal AD sampling circuit output by the temperature sensor is connected with the processor.
Further, in the above-mentioned intelligent purification power stabilizer: the mobile phone further comprises a communication device, wherein the communication device is WiFi communicating with the mobile phone APP.
Further, in the above-mentioned intelligent purification power stabilizer: the device also comprises a buzzer controlled by the processor.
Further, in the above-mentioned intelligent purification power stabilizer: and a display connected with the processor.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of the main loop of the purification regulator.
Fig. 2 is a schematic block diagram of an intelligent purification power stabilizer in embodiment 1 of the present invention.
Fig. 3 is the electric leakage detection circuit block diagram in the intelligent purification and power stabilization device of embodiment 1 of the utility model.
Fig. 4 is the electric leakage detection circuit schematic diagram in the intelligent purification and power stabilizer of embodiment 1 of the utility model.
Fig. 5 is a schematic block diagram of an electricity consumption metering circuit in the intelligent purification and electricity stabilization device in embodiment 1 of the present invention.
Fig. 6 is the utility model discloses current detection circuit all the way in embodiment 1 intelligent purification steady electrical apparatus.
Fig. 7 is the utility model discloses voltage detection circuit all the way in embodiment 1 intelligent purification steady electric appliance.
Fig. 8 is a connection diagram of a three-phase multifunctional metering chip U1 in an intelligent purification and power stabilizer of the embodiment 1 of the present invention.
Detailed Description
Embodiment 1, this embodiment is a household intelligent purification and power stabilization device, and this intelligent purification and power stabilization device is a power supply source that cooperates with intelligent house, and it has realized to the electric wire steady voltage purification while, also carries out leakage detection to the electric appliance that uses in the house, in case there is electric appliance leakage then cuts off the electric wire in order to guarantee the power consumption safety, as shown in fig. 2, likewise, in this embodiment, still has the metering circuit that carries out the measurement to the domestic power consumption, still has the temperature sensor that detects the temperature that intelligent purification and power stabilization device output, and the analog signal of the output of the temperature sensor of simulation connects the treater through AD sampling circuit output. In addition, still include communication device, communication device is the wiFi with cell-phone APP communication, and cell-phone APP can realize linking to each other with the treater among the steady electrical apparatus of intelligent purification through wiFi, obtains all the results that detect among the steady electrical apparatus of intelligent purification. In addition, a buzzer controlled by the processor, a display connected with the processor and the like are also included.
In the intelligent purification and voltage stabilization device of the embodiment, at least one main loop of a purification voltage stabilizer for purifying, stabilizing and outputting the input commercial power and the purified power is shown in fig. 1; the device also comprises a processor and a leakage detection circuit; the leakage detection circuit performs leakage detection on an electric appliance powered by the intelligent purification voltage stabilizer, the output end of a leakage detection result is connected with the processor, and the processor controls the relay in the main loop of the purification voltage stabilizer to realize whether the mains supply is connected or not according to the output result of the leakage detection circuit. As shown in fig. 3.
The present embodiment is a leakage detection circuit in a purification power stabilizer, which is used for detecting whether leakage occurs during leakage protection in the purification power stabilizer, as shown in fig. 3 and 4, in the present embodiment: the leakage detection circuit determines whether leakage occurs by detecting the current of the live wire and the zero wire of the input commercial power which pass through the two ends of the mutual inductor of the magnetic ring of the mutual inductor at the same time, if the leakage occurs, the purification and power stabilization device is controlled not to output power, so as to protect all the electric appliances in the home. If the voltage output by the transformer is greater than the forward voltage of a PN junction, namely more than 0.7V, one of the two diodes is always conducted, the output of the transformer is clamped below 0.7V, and then a filtering and sampling circuit for filtering and sampling the electric signal output by the transformer is arranged, wherein the filtering and sampling circuit is shown in FIG. 2 and comprises a resistor R30, a resistor R28, a resistor R32, a capacitor C35, a capacitor C38 and a capacitor 53; one output end of the mutual inductor is connected with one end of a resistor R30, a resistor R28 and a capacitor C35, the other output end of the mutual inductor is connected with the other end of a resistor 30 and is connected with one end of a capacitor C38 and one end of a resistor R32, the other ends of the capacitor C35 and the capacitor C38 are grounded, the other ends of the resistor R38 and the resistor R32 are respectively connected with two ends of a capacitor C53 to form two output ends of a sampling filter, and the two output ends are connected with pins IN1 and IN2 of the leakage protection IC. Thus, the filtered sampling output signal can be amplified by a leakage protection IC, which is a leakage protection IC of model VG54123A in this embodiment; two output ends of the filter are respectively connected with an IN1 pin and an IN2 pin of the leakage protection IC, and a VSS pin of the leakage protection IC is grounded, an NC pin and an OA pin are grounded through a capacitor C37, a DLY pin is grounded through a capacitor C52, and an OS pin outputs a signal whether the leakage exists or not through a filter circuit consisting of a capacitor C51 and a resistor R31.
The processor controls the relay J according to the signal whether the electric leakage exists or not, and when the electric leakage phenomenon exists, the relay J is controlled to disconnect the commercial power.
This embodiment is in the intelligence house, is used for measuring the power consumption metering circuit among the steady electrical apparatus of purification of whole domestic power among the steady electrical apparatus of domestic purification, and in this embodiment, the steady electrical apparatus of domestic purification exports three routes purification power, and to illumination power consumption, idle call and socket power consumption in the family respectively, and the socket power consumption includes the computer in the family. Household appliances such as televisions and washing machines are in use. As shown in fig. 5, in the present embodiment: the total household electricity consumption is obtained by respectively metering the lighting electricity consumption, the air conditioning electricity consumption and the socket electricity consumption. As shown in fig. 5, the electricity consumption metering circuit in the purifying and electricity-stabilizing device in this embodiment uses the current detection circuit and the voltage detection circuit to detect the current and the voltage of each path of purifying output of the purifying and electricity-stabilizing device, and uses the electricity metering chip to meter; the electric quantity metering chip adopts a three-phase multifunctional metering chip U1 with the model number of ATT 7022E. As shown in fig. 1, the parameters of the current output by the three-way current detection circuit are respectively input to V1P, V1N, V3N, V5N, and V5N (V (2X-1) N (2X-1) N) of the three-phase multifunctional metering chip U1 with the model ATT7022E from I1P, I1N, I2P, I2N, I3P, and I3N (IXP, IXN), and similarly, the parameters output by the corresponding three-way current detection circuit are respectively input to V2N, V4N, V6N, and V6V 72 (VXP, VXN) of the three-phase multifunctional metering chip U N with the model ATT 7022N from V1N, and the parameters output by V2N, V4N, V6X (V2X-1) N), where the electrical appliances (X, X3, X-X, and the electrical number can be purified. The other pins of the three-phase multifunctional metering chip U1 can be designed by themselves according to its manual, as shown in FIG. 8.
The current detection circuit is shown in fig. 6, which indicates one current detection circuit, and in this embodiment, there are three such current detection circuits, each current detection circuit includes a transformer L6 through which the live wire of the purified output passes, a resistor R24, a voltage R25, a capacitor C24, a capacitor C25, a resistor R23, a resistor R26, a capacitor C30, and a capacitor C34; one end of a coil of the transformer L6 is respectively connected with one end of a resistor R24 and one end of a capacitor C24, the other end of the coil is respectively connected with one end of a resistor R25 and one end of a capacitor C25, the other ends of the resistor R24 and the resistor R25 are both grounded, and the other ends of the capacitor C24 and the capacitor C25 are both grounded; one end of a coil of the transformer L6 is also connected with one end of a resistor R23, the other end of the resistor R23 is connected with one end of a capacitor C30 to form a first output end IXP of the current detection circuit, the other end of the coil of the transformer L6 is also connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a capacitor C34 to form a second output end IXN of the current detection circuit, and the other ends of the capacitor C30 and the capacitor C34 are respectively grounded; in addition, in this embodiment, the current detection circuit further includes a clamp circuit, the clamp circuit includes a diode D6 and a diode D9, the diode D6 and the diode D9 are respectively connected between two output terminals of the transformer L6, a P-pole of the diode D6 is connected to an N-pole of the diode D9, and an N-pole of the diode D6 is connected to a P-pole of the diode D9. Here it is clamped within the diode PN forward conduction voltage, i.e. below 0.7V.
The voltage detection circuit is shown in fig. 7 and comprises a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2; the resistor R1 and the resistor R2 are arranged between a live wire and a zero wire of the circuit purification output, the resistor R1 and the resistor R2 are voltage dividing resistors, when the resistor R1 is more than one hundred times of the resistor R2, under the normal condition, the voltage at two ends of the resistor R2 is below 0.4V, the capacitor C1 and the capacitor C2 are connected in parallel at two ends of the resistor R2, and the common end connected with the capacitor C1 and the capacitor C2 is grounded; a first output terminal VXP of the voltage detection circuit is formed at the common end of the resistor R2 connected with the capacitor C1, and a second output terminal VXN of the voltage detection circuit is formed at the common end of the resistor R2 connected with the capacitor C2.
Claims (10)
1. An intelligent purifying and voltage stabilizing device comprises at least one path of purifying and voltage stabilizing main loop for purifying and stabilizing the input commercial power and outputting purified power; the method is characterized in that: the device also comprises a processor and a leakage detection circuit; the leakage detection circuit performs leakage detection on an electric appliance powered by the intelligent purification voltage stabilizer, the output end of a leakage detection result is connected with the processor, and the processor controls the relay in the main loop of the purification voltage stabilizer to realize whether the mains supply is connected or not according to the output result of the leakage detection circuit.
2. The intelligent purification power stabilizer according to claim 1, wherein: the leakage detection circuit comprises a mutual inductor, a filter sampling circuit and a leakage protection IC, wherein a live wire and a zero wire of an input commercial power penetrate through a magnetic ring of the mutual inductor at the same time, the filter sampling circuit is used for filtering and sampling an electric signal output by the mutual inductor, and the leakage protection IC is VG54123A in model number; the two output ends of the mutual inductor are respectively connected with two input ends of the filter, the two output ends of the filter are respectively connected with an IN1 pin and an IN2 pin of the leakage protection IC and a VSS pin of the leakage protection IC to be grounded, an NC pin and an OA pin are grounded through a capacitor C37, a DLY pin is grounded through a capacitor C52, and an OS pin outputs a signal whether the leakage exists or not through a filter circuit consisting of the capacitor C51 and a resistor R31.
3. The intelligent purification power stabilizer according to claim 2, wherein: the filtering sampling circuit comprises a resistor R30, a resistor R28, a resistor R32, a capacitor C35, a capacitor C38 and a capacitor 53; one output end of the transformer is connected with one end of a resistor R30, a resistor R28 and a capacitor C35, the other output end of the transformer is connected with the other end of a resistor 30, and is connected with one end of a capacitor C38 and one end of a resistor R32, the other ends of the capacitor C35 and the capacitor C38 are grounded, and the other ends of the resistor R38 and the resistor R32 are respectively connected with two ends of a capacitor C53 to form two output ends of a sampling filter which are connected with pins IN1 and IN2 of the leakage protection IC.
4. The intelligent purification power stabilizer according to claim 2 or 3, wherein: the transformer further comprises a clamping circuit, the clamping circuit comprises a diode D8 and a diode D9, the diode D8 and the diode D9 are respectively connected between the two output ends of the transformer, the P pole of the diode D8 is connected with the N pole of the diode D9, and the N pole of the diode D8 is connected with the P pole of the diode D9.
5. The intelligent purification power stabilizer according to claim 1, wherein: the system comprises three main circuits of a purification voltage stabilizer, wherein the main circuits are used for purifying, stabilizing and outputting purified electric power from an input commercial power; the power consumption metering circuit adopts a current detection circuit and a voltage detection circuit to detect the current and the voltage output by the main loop of each path of the purification voltage stabilizer and adopts a power consumption metering chip to meter; the electric quantity metering chip adopts a three-phase multifunctional metering chip U1 with the model number of ATT 7022E;
the current detection circuit comprises a transformer L6, a resistor R24, a voltage R25, a capacitor C24, a capacitor C25, a resistor R23, a resistor R26, a capacitor C30 and a capacitor C34, wherein the live wire of the purified output of the circuit passes through a magnetic ring of the circuit; one end of a coil of the transformer L6 is respectively connected with one end of a resistor R24 and one end of a capacitor C24, the other end of the coil is respectively connected with one end of a resistor R25 and one end of a capacitor C25, the other ends of the resistor R24 and the resistor R25 are both grounded, and the other ends of the capacitor C24 and the capacitor C25 are both grounded; one end of a coil of the transformer L6 is also connected with one end of a resistor R23, the other end of the resistor R23 is connected with one end of a capacitor C30 to form a first output end IXP of the current detection circuit, the other end of the coil of the transformer L6 is also connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a capacitor C34 to form a second output end IXN of the current detection circuit, and the other ends of the capacitor C30 and the capacitor C34 are respectively grounded; the voltage detection circuit comprises a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2; the resistor R1 and the resistor R2 are arranged between the live wire and the zero wire of the purified output of the circuit, the capacitor C1 and the capacitor C2 are connected in parallel at two ends of the resistor R2, and the common end connected with the capacitor C1 and the capacitor C2 is grounded; a first output end VXP of the voltage detection circuit is formed by a common terminal of a resistor R2 connected with a capacitor C1, a second output end VXN of the voltage detection circuit is formed by a common terminal of a resistor R2 connected with a capacitor C2, and a first output end IXP and a second output end IXN of the current detection circuit are respectively connected with a V { 2X-1 } P end and a V { 2X-1 } N end of a three-phase multifunctional metering chip U1; a first output end VXP and a second output end VXN of the voltage detection circuit are respectively connected with a V { 2X } P end and a V { 2X } N end of the three-phase multifunctional metering chip U1; the X-th path purge output is represented by X, which is { 1, 2, 3 }.
6. The intelligent purification power stabilizer according to claim 5, wherein: the current detection circuit further comprises a clamping circuit, the clamping circuit comprises a diode D6 and a diode D9, the diode D6 and the diode D9 are respectively connected between two output ends of the mutual inductor L6, a P pole of the diode D6 is connected with an N pole of the diode D9, and an N pole of the diode D6 is connected with a P pole of the diode D9.
7. The intelligent purification power stabilizer according to claim 1, wherein: the temperature sensor is used for detecting the temperature of each path of the main loop of the purification voltage stabilizer, and the output of the analog signal AD sampling circuit output by the temperature sensor is connected with the processor.
8. The intelligent purification power stabilizer according to claim 1, wherein: the mobile phone further comprises a communication device, wherein the communication device is WiFi communicating with the mobile phone APP.
9. The intelligent purification power stabilizer according to claim 1, wherein: the device also comprises a buzzer controlled by the processor.
10. The intelligent purification power stabilizer according to claim 1, wherein: and a display connected with the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921632939.4U CN210326994U (en) | 2019-09-28 | 2019-09-28 | Intelligent purification and stability device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921632939.4U CN210326994U (en) | 2019-09-28 | 2019-09-28 | Intelligent purification and stability device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210326994U true CN210326994U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921632939.4U Expired - Fee Related CN210326994U (en) | 2019-09-28 | 2019-09-28 | Intelligent purification and stability device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210326994U (en) |
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2019
- 2019-09-28 CN CN201921632939.4U patent/CN210326994U/en not_active Expired - Fee Related
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Granted publication date: 20200414 Termination date: 20200928 |