CN216627372U

CN216627372U - Electric field generating device based on piezoelectric transformer and refrigerator

Info

Publication number: CN216627372U
Application number: CN202122797030.8U
Authority: CN
Inventors: 白连社
Original assignee: Baige Xi'an Intelligent Technology Co ltd
Current assignee: Baige Xi'an Intelligent Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-31
Anticipated expiration: 2031-11-16

Abstract

The utility model discloses an electric field generating device based on a piezoelectric transformer, which comprises a power supply connecting part, a piezoelectric transformer driving circuit, the piezoelectric transformer, a voltage doubling rectifying circuit, a feedback control circuit and an electric field emitting device, wherein the output end of the piezoelectric transformer driving circuit is electrically connected with the input end of the piezoelectric transformer, the output end of the piezoelectric transformer is electrically connected with the input end of the voltage doubling rectifying circuit, the output end of the voltage doubling rectifying circuit is electrically connected with the input end of the electric field emitting device, the electric field emitting device and the output end of the piezoelectric transformer are electrically connected with the feedback control circuit, and the feedback control circuit is electrically connected with the input end of the piezoelectric transformer driving circuit. The utility model also discloses a refrigerator with the electric field generating device based on the piezoelectric transformer. The utility model uses piezoelectric transformer to replace heavy and complex electromagnetic transformer, with small volume and high reliability. The fresh-keeping agent plays a good role in keeping fresh for different vegetables, fruits, meats, seafood, food, beverages, milk, wine, seeds and the like.

Description

Electric field generating device based on piezoelectric transformer and refrigerator

Technical Field

The utility model relates to the technical field of electromagnetic field preservation, in particular to an electric field generating device based on a piezoelectric transformer and a refrigerator.

Background

The quasi-net electric field or the electrostatic field has good fresh-keeping effect on vegetables, fruits, food and beverage, dairy products, meat, seafood, seeds and the like. The pulse electric field has good sterilization and fresh-keeping effects on milk and good fresh-keeping effects on vegetables, fruits and meat. Research in the field of food preservation, the electromagnetic field intensity and frequency of optimal preservation requirements of different vegetables, fruits, food, beverages, meat and seafood are often different; research in the field of food preservation, and the electromagnetic field plays a good role in preserving meat and seafood in the quick-freezing and unfreezing processes.

In medical research, a low-intensity (1-2V/cm) and medium-frequency (100-200 kHz) alternating current electric field has a certain treatment effect on tumors. The low-temperature plasma electric field and the plasma have good sterilization and disinfection effects.

The electromagnetic field fresh-keeping device in the prior art adopts an electromagnetic transformer, and the electromagnetic transformer has large loss, heavy weight, thin copper wire due to high voltage rise, large processing difficulty, and poor reliability and safety.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electric field generating device based on a piezoelectric transformer and a refrigerator. The fresh-keeping agent plays a good role in keeping fresh aiming at different vegetables, fruits, meats, seafood, food and beverage, milk, wine, seeds and the like, and can solve the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an electric field produces device based on piezoelectric transformer, includes power connecting portion, piezoelectric transformer drive circuit, piezoelectric transformer, voltage doubling rectifier circuit, feedback control circuit and electric field emission device, power connecting portion electricity is connected piezoelectric transformer drive circuit's input, piezoelectric transformer drive circuit's output and piezoelectric transformer's input electricity are connected, the input of voltage doubling rectifier circuit is connected to piezoelectric transformer's output electricity, the input of electric field emission device is connected to voltage doubling rectifier circuit's output electricity, the input of feedback control circuit is connected to electric field emission device's output and piezoelectric transformer's output electricity, and feedback control circuit's output is connected with piezoelectric transformer drive circuit's input electricity.

The piezoelectric transformer driving circuit is electrically connected with the voltage doubling rectifying circuit, and the input signal of the control circuit is the preset voltage and frequency of the electric field emission device.

Further, the voltage of the power supply connected with the power supply connecting part comprises wide-voltage power frequency voltage or safe direct current voltage, the wide-voltage power frequency voltage range is 90V-256V, and the frequency is 50Hz/60 Hz.

Further, the piezoelectric transformer driving circuit adopts a PWM piezoelectric transformer driving circuit.

Furthermore, the electric field emission device adopts an oscillation circuit emission device aiming at a high-voltage pulse electric field and a high-voltage electromagnetic field or a high-voltage quasi-electrostatic field, adopts an electric plate electrode device aiming at the high-voltage electrostatic field, and adopts a plasma generation device aiming at a low-temperature plasma electric field.

The utility model provides another technical scheme that: a refrigerator includes an electric field generating device based on a piezoelectric transformer.

Compared with the prior art, the utility model has the following beneficial effects:

according to the electric field generating device based on the piezoelectric transformer and the refrigerator, the piezoelectric transformer is used, so that a heavy and complex electromagnetic transformer is avoided, and the purposes of small size and high reliability are achieved. The device can also realize different electric fields and electric field parameters in the refrigerator, and has good fresh-keeping effect on different vegetables, fruits, meat, seafood, food and beverage, milk, wine, seeds and the like.

Drawings

FIG. 1 is a schematic structural diagram of an electric field generating device based on a piezoelectric transformer according to the present invention;

fig. 2 is a schematic structural view of the piezoelectric transformer-based electric field generating apparatus of the present invention applied to a refrigerator.

In the figure: 1. a power supply connection part; 2. a piezoelectric transformer drive circuit; 3. a piezoelectric transformer; 4. a voltage doubler rectifier circuit; 5. a feedback control circuit; 6. a control circuit; 7. an electric field emission device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The electric field generating device based on the piezoelectric transformer (shown by a letter M in fig. 2) can be applied to a refrigerator, but is not limited thereto, and the electric field generating device based on the piezoelectric transformer can be applied to occasions and equipment which need specific high-voltage medium-low power electromagnetic fields, such as cold-chain logistics vehicles, fresh-keeping warehouses, freezers, deep fryer, electromagnetic field medical equipment and the like, and all belong to the protection scope of the utility model.

The first embodiment is as follows:

referring to fig. 1, an electric field generating device based on a piezoelectric transformer comprises a power supply connection portion 1, a piezoelectric transformer driving circuit 2, a piezoelectric transformer 3, a voltage doubling rectifying circuit 4, a feedback control circuit 5, a control circuit 6 and an electric field emitting device 7, wherein the power supply connection portion 1 is electrically connected with an input end of the piezoelectric transformer driving circuit 2, an output end of the piezoelectric transformer driving circuit 2 is electrically connected with an input end of the piezoelectric transformer 3, an output end of the piezoelectric transformer 3 is electrically connected with an input end of the voltage doubling rectifying circuit 4, an output end of the voltage doubling rectifying circuit 4 is electrically connected with an input end of the electric field emitting device 7, an output end of the electric field emitting device 7 is respectively electrically connected with an input end of the feedback control circuit 5 and an input end of the control circuit 6, an output end of the feedback control circuit 5 and an output end of the control circuit 6 are both electrically connected with an input end of the piezoelectric transformer driving circuit 2, the control circuit 6 receives control signals of voltage and frequency. The output end of the piezoelectric transformer 3 is electrically connected with the input end of the feedback control circuit 5. The output end of the control circuit 6 is also electrically connected with the input end of the voltage-doubling rectifying circuit 4. The power frequency AC power supply or the DC safety power supply of the power supply connecting part 1 is filtered and rectified into DC through the piezoelectric transformer driving circuit 2, then is inverted and impedance-matched into voltage suitable for the piezoelectric transformer 3, thereby being boosted into high-frequency AC voltage, high-voltage pulse voltage, low-frequency AC high voltage or DC high voltage can be obtained through the corresponding voltage doubling rectifying circuit 4, the feedback control circuit 5 feeds back the voltage fluctuation output according to the capacitive load characteristics and the like to the piezoelectric transformer driving circuit 2 for adjustment, thereby obtaining stable high-voltage pulse voltage, low-frequency AC high voltage or DC high voltage, then a corresponding electric field emitting device 7 can generate a high-voltage pulse electromagnetic field, a low-temperature plasma electromagnetic field, a high-voltage quasi-static electromagnetic field or a high-voltage static electric field, the control circuit 6 can generate the high-voltage pulse electromagnetic field, the low-temperature plasma electromagnetic field, the high-voltage quasi-static electromagnetic field or the high-voltage static electric field according to the frequency and voltage requirements of the specific electric field of the fresh-keeping food materials and the like, the signal is given to the piezoelectric transformer driving circuit 2 to change the inversion voltage of the driving voltage so as to change the output voltage, and the signal is given to the voltage doubling rectifying circuit 4 to change the duty ratio so as to change the frequency of the alternating current high voltage and the duty ratio of the high-voltage pulse voltage. The electric field generating device has small volume, reliability and high safety, can pertinently realize different electric fields and electric field parameters, and has good fresh-keeping effect on different vegetables, fruits, meat, seafood, food and beverage, milk, wine, seeds and the like.

The voltage provided by the power supply connection part 1 comprises a wide-voltage power frequency voltage and a safe direct-current voltage, but is not limited to the voltage range, the wide-voltage power frequency voltage range is 90V-256V, and the frequency is 50Hz/60 Hz.

The piezoelectric transformer driving circuit 2 is a PWM piezoelectric transformer driving circuit, but is not limited to this circuit.

The electric field emission device 7 uses an LC oscillator circuit emission device for a high-voltage pulse electric field and a high-voltage electromagnetic field or a high-voltage quasi-electrostatic field, and may use a plate electrode device for a high-voltage electrostatic field, and a plasma generation device for a low-temperature plasma electric field, using a generated high-voltage pulse voltage or a direct-current high voltage, but is not limited thereto.

Example two:

a refrigerator comprises a refrigerating chamber, an electric field generating device based on a piezoelectric transformer and a freezing chamber, wherein the refrigerating chamber and the freezing chamber share an evaporator, the cold energy of the evaporator is firstly sent into the freezing chamber from a freezing air duct through an evaporator fan for refrigeration, the return air of the freezing chamber enters the refrigerating chamber for refrigeration, an air door is arranged between the refrigerating air duct and the freezing air duct, and the refrigerated return air directly flows back to the evaporator.

Wherein:

the electric field emitting device selects the LC oscillating circuit emitting device, and the generated electric field is a high-voltage quasi-electrostatic field.

The electric field generating device based on the piezoelectric transformer is arranged at the bottom of the refrigerating chamber, and the refrigerating chamber and the freezing chamber generate electromagnetic fields. The electric connection part 1 of the electric field generating device based on the piezoelectric transformer is directly electrically connected with a power supply board or a control board of the refrigerator.

The control circuit 6 is integrated on the refrigerator control board, and the input control signal of the control circuit 6 comes from the refrigerator control board. The opening and closing of the electric field generating device based on the piezoelectric transformer are controlled by the refrigerator control panel, so that the integrated design is carried out, the module device is simplified, and the cost is saved.

The utility model uses the piezoelectric transformer and the corresponding circuit to replace a heavy and complex magnetic transformer, has small volume, high reliability and high safety, and can play a good role in keeping fresh for different vegetables, fruits, meats, seafood, food and beverage, milk, wine, seeds and the like.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electric field generating device based on a piezoelectric transformer is characterized by comprising a power supply connecting part (1), a piezoelectric transformer driving circuit (2), the piezoelectric transformer (3), a voltage doubling rectifying circuit (4), a feedback control circuit (5) and an electric field emission device (7), wherein the power supply connecting part (1) is electrically connected with the input end of the piezoelectric transformer driving circuit (2), the output end of the piezoelectric transformer driving circuit (2) is electrically connected with the input end of the piezoelectric transformer (3), the output end of the piezoelectric transformer (3) is electrically connected with the input end of the voltage doubling rectifying circuit (4), the output end of the voltage doubling rectifying circuit (4) is electrically connected with the input end of the electric field emission device (7), the output end of the electric field emission device (7) and the output end of the piezoelectric transformer (3) are electrically connected with the input end of the feedback control circuit (5), the output end of the feedback control circuit (5) is electrically connected with the input end of the piezoelectric transformer driving circuit (2).

2. A piezoelectric transformer-based electric field generating apparatus as claimed in claim 1, further comprising a control circuit (6), wherein an input terminal of the control circuit (6) is electrically connected to the electric field emitting device (7), an output terminal of the control circuit (6) is electrically connected to the piezoelectric transformer driving circuit (2) and the voltage doubling rectifying circuit (4), and an input signal of the control circuit (6) is a preset voltage and frequency of the electric field emitting device.

3. The piezoelectric transformer-based electric field generating apparatus as claimed in claim 1, wherein the voltage of the power supply connected to the power supply connection part (1) comprises a wide-voltage power frequency voltage or a safe direct current voltage, the wide-voltage power frequency voltage is in a range of 90V to 256V, and the frequency is 50Hz/60 Hz.

4. The piezoelectric transformer-based electric field generating apparatus as claimed in claim 1, wherein said piezoelectric transformer driving circuit (2) is a PWM-based piezoelectric transformer driving circuit.

5. The piezoelectric transformer-based electric field generating apparatus as claimed in claim 1, wherein the electric field emitting means (7) employs an oscillator circuit emitting means for the high voltage pulse electric field and the high voltage electromagnetic field or the high voltage quasi-electrostatic field, an electrode plate electrode means for the high voltage electrostatic field, and a plasma generating means for the low temperature plasma electric field.

6. A refrigerator, characterized in that, comprises the electric field generating apparatus based on a piezoelectric transformer according to any one of claims 1 to 5.