LOW-TEMPERATURE PRESERVATION DEVICE WITH DISINFECTION AND FRESH-KEEPING FUNCTIONS

Abstract

A low-temperature preservation device with disinfection and fresh-keeping functions comprises low-temperature preservation spaces (11, 12, 13), an electron emission assembly (2), a refrigeration system, an electric system and a housing. The electron emission assembly (2) emits electrons to form negative electric nano particles with a certain density, thereby enabling the preservation spaces into a disinfection state. The negative electric nano particles attached to the surfaces of preserved articles, with water molecules, form hydration films on the preserved articles, so that water of the preserved articles is kept, bacteria and viruses on the surfaces of the preserved articles are killed, freshness of the preserved articles is kept, and the preservation time is prolonged.

Claims

1-6. (canceled)

7. A low-temperature preservation device with disinfection and fresh-keeping functions, made of a thermal insulation material, comprising: at least one low-temperature preservation space with different temperatures in at least one from the group consisting of mobile and stationary type devices; a refrigerating system; an electric system; a housing; and at least one electron emission assembly, equipped in the low-temperature preservation space with different temperatures, comprising an electron emitter, an emission window, and a case, and connected to an power supply and a control unit associated via wires; wherein, the electron emitter includes at least one of the group consisting of a single electrode and a plurality of electrodes having the same potential, and having a potential relative to a ground potential outside the preservation device, the potential of the electron emitter ranges from 2 kv to 35 kv, the electron emitter being configured to emit electrons into the corresponding low-temperature preservation space only based on a tunneling effect.

8. The low-temperature preservation device according to claim 7, wherein the electron emitter defines at least from the group consisting of a sharp shape, a serrated shape, and a plate shape, the electron emitting being composed of at least one of the group consisting of a metal, carbon, and composite material.

9. The low-temperature preservation device according to claim 7, wherein the quantity and arrangement of the electron emission assemblies vary in dependence upon different volume, shape, size and temperature of the low-temperature preservation space; negative electric nano particles formed by electrons emitted by the electron emitter based on tunneling effect are distributed in the corresponding low temperature preservations space, the density of the negative electric nano particles in the low temperature preservation space is more than 5*10.sup.3/cm.sup.3 but less than or equal to 10.sup.8/cm.sup.3.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is a cross-sectional view of a domestic refrigerator with an electron emission assembly according to the present invention;

[0013] FIG. 2 is a cross-sectional view of a vehicle-mounted low-temperature refrigeration device with an electron emission assembly according to the present invention; and

[0014] FIG. 3 is a cross-sectional view of a large-size refrigerating warehouse with an electron emission assembly according to the present invention.

DETAILED DESCRIPTION

[0015] FIG. 1 is a cross-sectional view of a domestic refrigerator with an electron emission assembly according to the present invention. Different from commercially available refrigerators at current, a refrigerator of the invention is additionally equipped with an electron emission assembly 2 in each of freezing and refrigerating chambers. In the refrigerator with the electron emission assembly 2, electrons emitted by an electron emitter form negative electric nano particles, which can kill bacteria and viruses when the density of the negative electric nano particles is more than 5*10.sup.3/cm.sup.3, in the preservation spaces. Typically, the temperature in a first freezing area 11 of the refrigerator may range from 8 to 12, the temperature in a second freezing area 12 may be 5, and the temperature in a refrigerating and fresh-keeping area 13 may range from 6 to 9. The refrigerator comprises a refrigerating system and an electric system, which are consisted of a compressor, a condenser, a dry filter, a capillary tube, an evaporator, etc. An emission window of the electron emission assembly occupies less than 0.2 L of space in the refrigerator which has hundreds liter independent preservation spaces, and is located in a corner of the preservation spaces, therefore the preservation spaces may not be affected in its usage as long as a proper position arrangement is in place. As shown in FIG. 1, the low-temperature preservation spaces may be used as disinfection chambers at the same time, and may also be regarded as an exemplary embodiment illustrating the integration of the preservation device and the disinfection device. Moreover, the temperature in each of the preservation spaces may also be changed, so as to enable each of the preservation spaces to become a special and dedicated disinfection chamber.

[0016] Generally, temperatures in the refrigerating areas of the commercially available refrigerators range from 4 to 5, even some of the refrigerators further have a fresh-keeping area with a temperature ranging from 3 to 0. As the refrigerators of the existing art lack a sterilization function, various food products, vegetables, and fruits may still cause bacteria propagation in the preservation areas, thereby leading to food spoilage. Even though foods, such as various meats and frozen foods, preserved in the freezing area with a temperature ranging from 18 to 24, may still go bad under the effect of the propagation of psychrophilic bacteria including various psychrophilic molds, resulting in shortened preservation time.

[0017] FIG. 2 is a cross-sectional view of a vehicle-mounted low-temperature refrigeration device with the electron emission assembly according to the invention. The refrigeration device according to the present invention is comprised of a refrigerating or freezing preservation space 1, an electron emission assembly 2, a refrigerating system, an electric system, and a power system. As generally the volume of its low-temperature preservation space is less than 50M.sup.3 to 80 M.sup.3, and its maximum size is less than 6 m, only one electron emission assembly 2 is required. If the preservation space 1 of a refrigerator car is divided into two portions for freezing and refrigerating, an electron emission assembly 2 may be installed in each of the portions. The areas of the emission windows may be decreased, and a set of power supply could be used for both the electron emitters of the electron emission assemblies 2. The effects described above can be achieved once the density of the negative electric nano-particles in respective portions of the preservation space 1 is more than 5*10.sup.3/cm.sup.3 but less than or equal to 10.sup.8/cm.sup.3.

[0018] FIG. 3 is a cross-sectional view of a large size refrigerated warehouse with the electron emission assemblies according to the present invention. The size of the refrigerating space 1 is 24 m (length)*12 m (width)*4 m (height), eight electron emission assemblies 2 are respectively arranged at the two sides with a width of 12 m of the preservation space (a total of 16 electron emission assemblies 2 are distributed), and a set of power supply are shared by the 16 electron emission assemblies 2. The area of the emission window of each of the electron emission assemblies 2 is less than 2550 cm.sup.2, and the low-temperature preservation effects described above can be achieved once the density of the negative electric nanoparticles in the preservation space 1 of the refrigerating warehouse is more than 5*10.sup.3/cm.sup.3 but less than and equal to 10.sup.8/cm.sup.3.

[0019] In conclusion, the object of the present invention can be achieved by deploying at least one electron emission assembly 2 in different arrangements in the low-temperature preservation box, preservation car or preservation warehouse. For example, one electron emission assembly 2 is arranged in a refrigerator for a preservation space of a maximum size of 6 m and for a low-temperature preservation space with a volume no more than 50 M.sup.3 to 80 M.sup.3; and in this case the area of the emission window of the electron emission assembly 2 could be less than 25*50 cm.sup.2. For a domestic electric refrigerator with a low-temperature preservation space far less than 50M.sup.3, the area of the emission window of the electron emission assembly 2 and the number of the electrodes of the same potential may be reduced. The electric components of the electron emission assembly 2 can be easily matched with the ones of the low-temperature preservation device to form a reliable entirety. Since the low-temperature preservation space is a disinfection space, the low-temperature preservation device may be served as a disinfection box or a disinfection cabinet at the same time, or the preservation space 1 may be served as a disinfection space. Alternatively, various special and dedicated disinfection preservation devices with different temperatures and different structures are manufactured and applied to multiple fields including daily life, medical treatment, food, scientific research, industrial and agricultural production, etc. for multiple purposes.

[0020] As the low-temperature preservation space of the present invention is in a disinfection state, a hydration film is formed on the surface of the preserved article and the negative electric nanoparticles attached on the surface of the preserved article kill the bacteria and viruses on the surface of the preserved article at the same time. Therefore, the temperature of the low-temperature preservation space is no longer limited by the factors, and an optimal combination of the parameters and temperature with the volume and structure of the preservation device may be selected according to an actual requirement and with reference to a refrigerant selected for the preservation device. Primary revolution is conducted to the existing low-temperature preservation devices to achieve comprehensive objects of reducing energy consumption, comprehensively improving the performance of the low-temperature preservation device, and implementing environmental protection.