A low-frequency alternating electromagnetic field fresh-keeping device

Abstract

The application relates to the field of food preservation, in particular to a low-frequency alternating electromagnetic field preservation device, which comprises a main machine and at least one antenna, the main machine is used for generating a low-frequency alternating high-voltage electromagnetic field signal and transmitting the signal to the antenna through a cable, and the antenna radiates the signal to form a micro-intensity field strength in a closed space of a refrigeration device. The main machine comprises an alternating high-voltage plate, an EMI filter plate, a display control plate and a touch display screen, the antenna has various shapes and is symmetrically distributed along the inner wall of the closed space of the refrigeration device, and the like. The application can set appropriate frequency and voltage peak value according to different food varieties, utilizes the low-frequency alternating electromagnetic field to form a micro-intensity field strength in the refrigeration device, and effectively realizes the technical effect of food preservation.

Description

Technical Field

[0001] This application relates to the field of food preservation, and in particular to a low-frequency alternating electromagnetic field preservation device. Background Technology

[0002] With increasing consumer demand for fruits, vegetables, and food, the continuous expansion of global trade, and the development of efficient logistics and transportation, consumers' living standards are becoming increasingly rich, leading to higher demands for quality of life. However, due to the difficulty in solving the problem of short shelf life of fruits, fruits such as peaches, bananas, durians, watermelons, and jujubes are often forcibly picked when they are only five or six tenths ripe, and then soaked in various chemicals to ripen and preserve them.

[0003] However, this preservation method may leave chemical residues, and the preservation period is relatively limited. To address this issue, high-frequency, high-voltage electric fields are currently used to improve the preservation effect in the field of fruit preservation. These fields kill microorganisms and damage their DNA structure.

[0004] However, high-frequency, high-voltage electric fields generate slight heat during operation, thus requiring increased temperature control. They also cause some moisture loss. Furthermore, such equipment has high energy consumption, which is not economical for long-term preservation and storage. Utility Model Content

[0005] This application provides a low-frequency alternating electromagnetic field preservation device, which can provide a good preservation effect and has the advantages of high efficiency and low power consumption. The technical solution is as follows: A low-frequency alternating electromagnetic field preservation device includes a main unit and at least one antenna. The main unit includes an alternating high-voltage board and an EMI filter board, used to generate an alternating high-voltage electromagnetic field signal with a frequency of 40Hz to 1000Hz and a peak voltage of 1kV to 10kV. The antenna is connected to the main unit via a cable and is used to receive the signal generated by the main unit. The antenna is used to be installed in the enclosed space of the refrigeration device and radiates the alternating high-voltage electromagnetic field signal to form a field strength.

[0006] By adopting the above technical solution, an alternating high-voltage electromagnetic field signal with a specific frequency and voltage peak is generated and radiated into the enclosed space of the refrigeration device to form a micro-intensity field. This can kill microorganisms, bacteria and viruses on the surface of food, decompose ethylene, inhibit the activity of food enzymes, slow down the metabolism and evaporation of food, reduce moisture loss, extend the shelf life of food by 1-3 times, reduce the weight loss rate to 2%, achieve zero chemical pollution, reduce nutrient loss, and maintain the original color, aroma, taste, nutritional value and texture of food. It also has the characteristics of low energy consumption, high efficiency, low cost, convenient installation, simple operation and no radiation.

[0007] Preferably, the antenna includes a radiator and an insulating shell that encloses the radiator, wherein the radiator is any one of the following shapes: flat plate, cylindrical, mesh, or spiky.

[0008] By adopting the above technical solutions, antennas of different shapes can be flexibly selected and matched according to the shape and size of the enclosed space of the cooling device, thereby adapting to different usage scenarios and greatly enhancing the scope of application and flexibility.

[0009] Preferably, the host further includes a display control board and a touch screen; the display control board is electrically connected to the alternating high voltage board to control the on / off state, frequency, and voltage peak value of the output signal of the alternating high voltage board; the touch screen is electrically connected to the display control board to display parameters and receive human-machine interaction commands.

[0010] By adopting the above technical solution, the display and control board controls the on / off state, frequency, and voltage peak value of the output signal of the alternating high voltage board, which can realize precise control of the output signal of the host; the touch screen displays parameters and receives human-machine interaction commands, making it convenient for users to operate and set parameters.

[0011] Preferably, the host is connected to multiple antennas via a junction box.

[0012] By adopting the above technical solution, the main unit connects multiple antennas through a junction box, which helps to make the antennas radiate alternating high-voltage electromagnetic field signals evenly into the enclosed space of the refrigeration device, better cover the entire space, and improve the preservation effect.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. This application generates a low-frequency alternating high-voltage electromagnetic field signal with a peak voltage of 1kV to 10kV and a frequency of 40Hz to 1000Hz. This forms a low-intensity field in the enclosed space of the refrigeration device, which can kill microorganisms, bacteria and viruses on the surface of food, decompose ethylene, inhibit the activity of food enzymes, slow down the metabolism and evaporation of food, reduce moisture loss, extend the shelf life of food by 1-3 times, reduce the weight loss rate to 2%, achieve zero chemical pollution, reduce nutrient loss, and maintain the original color, aroma, taste, nutritional value and texture of food. It also features low energy consumption, high efficiency, low cost, convenient installation, simple operation and no radiation. 2. By using antennas of different shapes and numbers, they can be flexibly arranged in refrigeration devices of different shapes and sizes, thereby improving the preservation effect and increasing the flexibility of application. Attached Figure Description

[0014] Figure 1 This is a circuit module block diagram of the low-frequency alternating electromagnetic field preservation device in the embodiments of this application; Figure 2 This is a schematic diagram of the planar antenna structure in an embodiment of this application; Figure 3 This is a schematic diagram of the cylindrical antenna structure in an embodiment of this application; Figure 4 This is a schematic diagram of the mesh antenna structure in an embodiment of this application; Figure 5 This is a schematic diagram of the thorn-like antenna structure in an embodiment of this application; Figure 6 This is a schematic diagram of the cage antenna structure in an embodiment of this application.

[0015] The following labels are used in the attached diagram: 1. Main unit; 11. Alternating high voltage board; 12. EMI filter board; 13. Display and control board; 14. Touch screen; 2. Antenna; 21. Insulating shell; 22. Radiator. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0017] The low-frequency alternating electromagnetic field preservation device provided in this application includes a main unit 1 and at least one antenna 2. The main unit 1 is connected to the antenna 2 via a cable. The main unit 1 generates an alternating high-voltage electromagnetic field signal with a frequency of 40Hz to 1000Hz and a peak voltage of 1kV to 10kV, and transmits the signal to the antenna 2 via the cable. The antenna 2 radiates the alternating high-voltage electromagnetic field signal into the enclosed space of the refrigeration device to form a low-intensity field. This can kill microorganisms, bacteria, and viruses on the surface of food, decompose ethylene, inhibit the activity of food enzymes, etc., while slowing down the metabolism and evaporation of food, reducing moisture loss, and achieving the purpose of preservation. Different varieties of vegetables, fruits, and foods can generate signals with different frequencies and peak voltages to achieve better preservation effects.

[0018] Reference body 1, specifically, the host unit 1 includes an alternating high-voltage board 11, an EMI filter board 12, a display and control board 13, and a touch screen display 14. The alternating high-voltage board 11 is mainly used to turn on and off the output of an alternating high-voltage signal with variable frequency and peak voltage according to the control signal input from the display and control board 13. It can be a circuit board with voltage and frequency adjustment functions, such as a high-voltage generator board integrating specific chips and circuits. Alternatives can be different models of high-voltage generator modules, as long as they can achieve an alternating high-voltage signal with variable output frequency and peak voltage.

[0019] The EMI filter board 12 is used to connect to the power supply and filter out high-frequency noise, eliminating power supply interference. It typically consists of a filter circuit composed of inductors, capacitors, etc., to achieve the filtering effect.

[0020] The display and control board 13 is electrically connected to the alternating high-voltage board 11 and is used to control the on / off state, frequency, and voltage peak value of the output signal of the alternating high-voltage board 11. It also provides functions such as human-machine interface display, parameter display, parameter setting, and signal switch control. The display and control board 13 can be a circuit board integrating a microprocessor and related control circuits; the microprocessor can be a single-chip microcomputer, etc. Alternatives can be control boards using different architectures, such as ARM-based control boards. The touch screen 14 is electrically connected to the display and control board 13 and is used for human-machine interface display, touch operation, and other functions. It can be a resistive touch screen or a capacitive touch screen.

[0021] The alternating high voltage board 11 is controlled by the display board 13 to turn on and off the output signal, and the human-machine interaction is performed through the touch screen 14. This allows the control of the on and off of the output signal of the alternating high voltage board 11, as well as the frequency and voltage peak of the output signal.

[0022] Specifically, refer to Figures 2 to 6 Antenna 2 includes a radiator 22 and an insulating shell 21 that encloses the radiator 22. The radiator 22 is mainly used to radiate electromagnetic wave signals into free space to form a low-intensity field. Its shape can be flat, cylindrical, mesh-like, spiky, or cage-like. A flat radiator 22 can be made of thin metal sheets, such as aluminum or copper, and is simple in structure and easy to manufacture. A cylindrical radiator 22 can be a metal cylinder, such as a stainless steel cylinder, and its radiation effect is relatively uniform. A mesh-like radiator 22 can be woven from metal wires, such as wire mesh, which can increase the radiation area. A spiky radiator 22 has spiky structures on its surface, which can enhance the local field strength. The insulating shell 21 protects the radiator 22 and also serves as insulation. It can be made of insulating materials such as plastic, such as polyethylene plastic. The shape of the insulating shell 21 is determined by the shape of the radiator 22 and must be able to completely enclose it. The host 1 and the antenna 2 are connected by a cable, which can be made of wire with good insulation and conductivity, such as copper core cable.

[0023] Preferably, this application uses four antennas 2, evenly distributed within the enclosed space of the cooling device. Specifically, the main unit 1 connects to the four antennas 2 via a junction box, which can be located at the center of the top of the cooling device. The junction box contains a splitter, and the four antennas 2 are connected to the splitter to distribute the signal output from the main unit 1 to each antenna 2. This results in a more uniform field strength distribution within the enclosed space of the cooling device.

[0024] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low frequency alternating electromagnetic field freshness preserving apparatus, characterized by: Includes a host (1) and at least one antenna (2). The host (1) includes an alternating high voltage board (11) and an EMI filter board (12). The EMI filter board (12) is used to connect to the power supply and filter out high-frequency noise. The alternating high voltage board (11) is used to generate an alternating high voltage electromagnetic field signal with a frequency of 40Hz to 1000Hz and a voltage peak of 1kV to 10kV. The antenna (2) is connected to the host (1) via a cable and is used to receive the signal generated by the host (1). The antenna (2) is used to be set in the enclosed space of the cooling device and to radiate the alternating high voltage electromagnetic field signal to form a field strength.

2. The low-frequency alternating electromagnetic field preservation device according to claim 1, characterized in that: The antenna (2) includes a radiator (22) and an insulating shell (21) that encloses the radiator (22). The radiator (22) can be any one of the following shapes: flat, cylindrical, mesh, or thorny.

3. The low-frequency alternating electromagnetic field preservation device according to claim 1, characterized in that: The host (1) also includes a display control board (13) and a touch screen (14); the display control board (13) is electrically connected to the alternating high voltage board (11) to control the on / off state, frequency and voltage peak of the output signal of the alternating high voltage board (11); the touch screen (14) is electrically connected to the display control board (13) to display parameters and receive human-machine interaction commands.

4. The low-frequency alternating electromagnetic field preservation device according to claim 1, characterized in that: The host (1) is connected to multiple antennas (2) via a junction box.

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