CN114435775A - A kind of fresh-keeping equipment and safety device and safety method for the fresh-keeping equipment - Google Patents

Abstract

The invention relates to a fresh-keeping device which comprises a non-metal cabin, a shielding layer and a high-voltage electric field generating device, wherein the shielding layer is arranged on each surface of the inner side of the non-metal cabin, the high-voltage electric field generating device comprises at least one pair of electrodes arranged in the non-metal cabin and used for generating an alternating high-voltage electric field, a storage space is formed between the electrodes, the fresh-keeping device also comprises a safety device, the safety device comprises an induction module, a cable and a current detection module, the induction module comprises an induction coil, the induction coil is arranged on the outer side of the shielding layer and connected with the current detection module through the cable, and the induction coil and the cable are insulated from the shielding layer. The invention also relates to a safety device and a safety method for the preservation equipment.

Description

A kind of fresh-keeping equipment and safety device and safety method for the fresh-keeping equipment

technical field

The invention relates to the technical field of fresh-keeping, in particular to a fresh-keeping device, a safety device and a safety method for the fresh-keeping device.

Background technique

When transporting goods such as fresh food and food over long distances, a low temperature method is usually used to maintain the freshness of the goods. With the continuous development of the cold chain logistics industry, fresh-keeping methods such as air-conditioned storage, refrigerated humidification, and refrigerated preservation have gradually emerged. However, if the storage and transportation time is too long, the preservation effect will be poor or even deteriorated. Through research, it is found that , on the basis of the existing refrigeration environment, the impact of high-voltage electrostatic field can effectively prolong the "activity" of many food cells, that is, prolong the preservation time. On the basis of traditional refrigeration, alternating high voltage is applied to the freezer storage bin, and an environment of electrostatic field is formed through voltage vibration, which can maintain the "freshness" of these foods for a long time. This technology can also be applied to flowers, plants, biological tissues, etc. low temperature transport and storage.

In the existing cold chain transportation process, a large number of low temperature storage cold chain cabins (boxes) are made of glass fiber materials for the consideration of manufacturing costs or reducing transportation load. If the high-voltage electric field auxiliary technology is applied to these cabins , there are bound to be risk factors. The alternating high voltage usually needs to reach thousands of volts. From a safety point of view, if the electromagnetic field leaks, it may interfere with the surrounding electronic products and wireless environment outside the cabin, and even interfere with the normal operation of the human heart pacemaker, which is life-threatening. For transportation cabins, especially those made of non-metallic materials, it is very important to ensure that the electric field is isolated from the outside. Good conductive materials, such as covering metal meshes, metal plates, etc., are installed on the walls of the cabin. However, during the transportation of the alternating high-voltage and low-temperature logistics cold chain cabin, due to long-term bumps and vibrations, or the movement and collision of objects inside the cabin, some shielding structures may be damaged, and there is a potential safety hazard of internal electromagnetic field leakage. The electromagnetic leakage cannot be sensed by the human body, especially during long-term transportation and use, the safety problem cannot be detected in time. Therefore, more effective measures are needed to improve the safety.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a fresh-keeping device and a safety device and a safety method for the fresh-keeping device.

A fresh-keeping device includes a non-metallic cabin body, a shielding layer and a high-voltage electric field generating device, the shielding layer is arranged on each surface inside the non-metallic cabin body, and the high-voltage electric field generating device includes at least a pair of electrodes arranged inside the non-metallic cabin body , used to generate an alternating high-voltage electric field, and a storage space is formed between the electrodes. The fresh-keeping equipment also includes a safety device. The safety device includes an induction module, a cable and a current detection module. The induction module includes an induction coil. The induction coil is arranged on the shielding On the outer side of the layer, the induction coil is connected to the current detection module through a cable, and the induction coil and the cable are insulated from the shielding layer.

Further, the induction module further includes a fixing member for accommodating the induction coil.

Further, the number of induction modules is multiple, and each induction coil is accommodated in each fixing member in a one-to-one correspondence.

Further, the induction coils are assigned numbers, and the current detection module identifies each induction coil according to the numbers.

A safety device for fresh-keeping equipment, the fresh-keeping equipment includes a non-metallic cabin, a shielding layer, and a high-voltage electric field generating device, the shielding layer is arranged on each surface of the inside of the non-metallic cabin, and the high-voltage electric field generating device includes a non-metallic cabin. At least one pair of electrodes inside the body is used to generate an alternating high-voltage electric field. A storage space is formed between the electrodes. The safety device includes an induction module, a cable and a current detection module. The induction module includes an induction coil, and the induction coil is arranged on the shield. Outside the layer, the induction coil is connected to the current detection module through a cable, and the induction coil and the cable are insulated from the shielding layer.

Further, the induction module further includes a fixing member for accommodating the induction coil.

Further, the number of induction modules is multiple, and each induction coil is accommodated in each fixing member in a one-to-one correspondence.

Further, the induction coils are assigned numbers, and the current detection module identifies each induction coil according to the numbers.

A safety method for fresh-keeping equipment, comprising the following steps:

Every time the high-voltage electric field generator works, detect and record whether there is induced current in each induction coil;

Compare whether the change of the induced current and the change of the alternating high voltage in the non-metallic cabin are synchronized in time;

If synchronized, an alarm signal will be issued and the corresponding induction coil number will be reported.

Further, the security method also includes the following steps:

Set a safety threshold. If the measured change of the induced current is synchronized with the change of the alternating high voltage in the non-metallic cabin in time and exceeds the safety threshold, an alarm signal will be issued and the corresponding induction coil number will be reported.

The fresh-keeping equipment, the safety device and the safety method for the fresh-keeping equipment of the present invention can timely find out whether there is electromagnetic leakage and other safety problems outside the non-metallic cabin by means of the current detection module to check whether the induction coil has a synchronous induction current; Arranging several induction coils and assigning an identity number to each induction coil can not only expand the detection space, but also locate abnormal locations in time to speed up troubleshooting.

Description of drawings

FIG. 1 is a schematic diagram of a fresh-keeping device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the installation position of the induction module of FIG. 1 .

FIG. 3 is a schematic diagram of another installation position of the sensing module of FIG. 1 .

FIG. 4 is a flow chart of a safety method for the preservation device of FIG. 1 .

FIG. 5 is another flow chart of the security method for the preservation device of FIG. 1 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 , which is a fresh-keeping device 100 according to an embodiment of the present invention, including a non-metallic cabin 10 , a shielding layer 20 , a high-voltage electric field generating device (not shown), and a safety device 40 . The shielding layer 20 is covered on each surface 12 of the cabin body 10 .

In this embodiment, the non-metallic cabin body 10 is a box body made of a six-sided rectangular parallelepiped freight non-metallic material, and the six surfaces 12 are covered with shielding layers 20 to reduce or prevent the high-voltage electric field radiation of the cabin body 10 from affecting the The adverse effects of the external environment, equipment and passengers of the cabin 10.

The high-voltage electric field generating device is used to generate a high-voltage electric field, and includes at least a pair of electrodes 30, an AC power supply and a boosting module (not shown in the figure). A storage space for storing items to be kept fresh (such as vegetables, meat, flowers and plants, biological tissues, etc.) is formed between the two. Specifically, the pair of electrodes 30 can be placed up and down, left and right, or front and rear relative to each other.

The safety device 40 includes a sensing module 42 , a cable 44 and a current detection module 46 .

Please refer to FIG. 2 and FIG. 3 together, the sensing module 42 is disposed on the outside of the shielding layer 20 , that is to say, it can be disposed between the shielding layer 20 and the inner side of the non-metallic cabin 10 , or can be disposed in the non-metallic cabin outside of the body 10 . The induction module 42 includes an induction coil 420 and a fixing member 424 . The induction coil 420 is a conductive coil capable of magnetic field induction, insulated from the shielding layer 20 and not in electrical contact with the shielding layer 20 . The induction coil 420 is accommodated in the fixing member 424. The fixing member 424 can be attached between the shielding layer 20 and the inner side of the non-metallic cabin 10, or can be attached to the outer side of the non-metallic cabin 10 for carrying, installation and protection. The induction coil 420 is insulated from the induction coil 420, the shielding layer 20, the cable 44, and the like.

The number of induction modules 42 is not limited to one, and multiple induction modules 42 can be arranged at multiple positions outside the cabin 10. Each induction coil 420 is accommodated in a corresponding fixing member 424, and each induction coil 420 has an identification number. Corresponding to the installation position outside the cabin 10 where it is located, the current detection module 46 can monitor the current changes induced by the induction coils 420 in various places, so that the electromagnetic environment around the cabin 10 can be detected more accurately and quickly. When an abnormality is found, the abnormal point can be quickly located to facilitate the dangerous investigation and maintenance.

The cable 44 is insulated from the shielding layer 20, and is respectively connected to the induction coil 420 and the current detection module 46 disposed outside the cabin 10 to form an induction current loop. Cable 44 may be a shielded cable.

The current detection module 46 has the functions of comparison and alarm signal reporting, and can test the current change value of the induction coil 420 . When an alternating high voltage (or pulsed high voltage) is applied by the oppositely arranged high-voltage electric field generating device, the alternating electric field in the cabin 10 will generate a corresponding alternating magnetic field. The induction coil 420 on the outside of the body 10 near the leak generates an induced current, which is transmitted to the current detection module 46 outside the cabin 10 through the cable 44, and the change of the induced current is synchronized with the change of the electric field inside the cabin. The closer the induction coil 420 is to the leakage position, the more obvious the induction current is.

Although the induction coils 420 outside the cabin 10 may also be affected by external electromagnetic waves and induce currents, they are usually very small and the features are easy to identify. The alarm safety threshold can also be set in advance. When one or several induction coils 420 induce currents (including When the instantaneous sudden change value) exceeds the safety threshold, the current detection module 46 sends an alarm signal, and at the same time gives the number of the induction coil 420 where the abnormal induced current signal is located, indicating the location of the abnormal point, and the driver and passengers can find the cabin 10 in time. If the internal electromagnetic field has an abnormal impact on the external environment, safety inspection and emergency treatment can be carried out immediately. In addition, the alarm signal can be transmitted to the background monitoring center through the communication network, so as to further investigate and deal with vehicles with potential safety hazards.

Please refer to FIG. 4 , which is a safety method for the above-mentioned fresh-keeping device according to an embodiment of the present invention, including the following steps:

A safety method for fresh-keeping equipment, comprising the following steps:

Every time the high-voltage electric field generator works, detect and record whether there is induced current in each induction coil;

Compare whether the change of the induced current and the change of the alternating high voltage in the non-metallic cabin are synchronized in time;

If synchronized, an alarm signal will be issued and the corresponding induction coil number will be reported.

Referring to Figure 5, further, the security method further includes the following steps:

Set a safety threshold. If the measured change of the induced current is synchronized with the change of the alternating high voltage in the non-metallic cabin in time and exceeds the safety threshold, an alarm signal will be issued and the corresponding induction coil number will be reported.

The fresh-keeping equipment, the safety device and the safety method for the fresh-keeping equipment of the present invention can timely find out whether there is electromagnetic leakage outside the non-metallic cabin by means of the current detection module to check whether the induction coil has a synchronous induction current and whether it exceeds the safety threshold. By laying out several induction coils and assigning an ID number to each induction coil, it can not only expand the scope of detection space, but also locate abnormal locations in time to speed up troubleshooting.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A fresh-keeping device, comprising a non-metallic cabin, a shielding layer and a high-voltage electric field generating device, the shielding layer is provided on each surface inside the non-metallic cabin, and the high-voltage electric field generating device includes a At least one pair of electrodes inside the non-metallic cabin is used to generate an alternating high-voltage electric field, and a storage space is formed between the electrodes. It is characterized in that: the fresh-keeping equipment further includes a safety device, and the safety device includes an induction module, A cable and a current detection module, the induction module includes an induction coil, the induction coil is arranged on the outer side of the shielding layer, the induction coil is connected to the current detection module through the cable, and the induction coil is connected to the current detection module. The induction coil and the cable are insulated from the shield. 2 . The fresh-keeping device according to claim 1 , wherein the induction module further comprises a fixing member for accommodating the induction coil. 3 . 3 . The fresh-keeping device according to claim 2 , wherein the number of the induction modules is plural, and each of the induction coils is accommodated in each of the fixing members in a one-to-one correspondence. 4 . 4 . The fresh-keeping device of claim 1 , wherein the induction coils are assigned numbers, and the current detection module identifies each of the induction coils according to the numbers. 5 . 5. A safety device for fresh-keeping equipment, the fresh-keeping equipment includes a non-metallic cabin, a shielding layer, and a high-voltage electric field generating device, the shielding layer is provided on each surface inside the non-metallic cabin, and the high-voltage electric field is The generating device includes at least a pair of electrodes arranged inside the non-metallic cabin for generating an alternating high-voltage electric field, and a storage space is formed between the electrodes. It is characterized in that: the safety device includes an induction module, a cable and a current detection module, the induction module includes an induction coil, the induction coil is arranged outside the shielding layer, the induction coil is connected to the current detection module through the cable, the induction coil and The cable is insulated from the shield. 6 . The safety device for fresh-keeping equipment according to claim 5 , wherein the induction module further comprises a fixing member for accommodating the induction coil. 7 . 7 . The safety device of claim 6 , wherein the number of the induction modules is plural, and each of the induction coils is accommodated in each of the fixing members in a one-to-one correspondence. 8 . . 8 . The safety device of claim 5 , wherein the induction coils are assigned numbers, and the current detection module identifies each of the induction coils according to the numbers. 9 . 9. A safety method for the fresh-keeping device of one of claims 1 to 4, comprising the steps of: Every time the high-voltage electric field generator works, detect and record whether there is induced current in each induction coil; comparing the temporal synchronization of the induced current changes with the alternating high voltage changes in the non-metallic cabin; and If synchronized, an alarm signal will be issued and the corresponding induction coil number will be reported. 10. The security method of claim 9, wherein the security method further comprises the steps of: Set a safety threshold. If the measured change of the induced current is synchronized with the change of the alternating high voltage in the non-metallic cabin in time and exceeds the safety threshold, an alarm signal will be issued and the corresponding induction coil number will be reported.

Images