Refrigerator

Abstract

The invention discloses a refrigerator, and belongs to the technical field of refrigerator sterilization. The refrigerator comprises an inner container and an ultraviolet lamp. The inner container defines an inner cavity, and steel plates are attached to the two sides of the inner cavity. The steel plate comprises C, Cu, Nd, Mn, P, S and Al. The mass fraction of Cu is selected from any one of 1.1%-1.5%, and the mass fraction of Nd is selected from any one of 0.05%-0.08%. The antibacterial agent is applied to the sterilization inner container of the refrigerator, solves the problems that an existing antibacterial means is poor in antibacterial effect and cannot meet the antibacterial requirement of the inner container of the refrigerator, and has the advantage of being good in antibacterial effect.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerator sterilization, and in particular relates to a refrigerator. Background Art

[0002] As people's living standards and hygiene awareness improve, they pay more and more attention to the sterilization effect of refrigerators. Improving the sterilization ability of refrigerators has become an important research topic in the refrigerator industry. Existing refrigerator sterilization methods include: UV lamp sterilization, ion sterilization, and metal particle antibacterial coating. However, it is difficult to kill bacteria attached to food by using UV lamps to sterilize the circulating air in the air duct; the effect of ion sterilization is slow and not as efficient as UV irradiation sterilization; the particle release rate of metal particle antibacterial coating is fast and the service life is short.

[0003] Chinese patent CN216347313U discloses a refrigerator, which uses a sterilization light strip in the refrigerator to irradiate the air outlet channel and the refrigeration airflow flowing through the air outlet channel, thereby achieving the effect of sterilization and disinfection; Chinese patent CN113899138A discloses an ion sterilization and fresh-keeping refrigerator and a fresh-keeping method, in which an ion generator is installed under the fan, and the ion generator continuously emits ions. Driven by the strong wind force of the fan, the ions accelerate in the cavity and are discharged from the ion outlet. During the movement, the positive and negative ions neutralize the charges, resulting in changes in the structure of the surrounding bacteria or energy conversion, causing the bacteria to die. The excess negative ions float in the refrigerator refrigeration room, continuously eliminating odors and purifying the air in the box; Chinese patent CN213178975U discloses a An inner liner with sterilization and disinfection function and a refrigerator thereof, wherein nano zinc oxide is evenly arranged on the inner liner, and the nano zinc oxide is spread all over the plastic sheet, and the nano zinc oxide is used for the sterilization and disinfection of the inner liner body; Chinese patent CN112143153A proposes a refrigerator inner liner, a refrigerator inner liner material and a preparation method thereof, and the antibacterial and sterilization effect is achieved by adding an inorganic antibacterial agent to the inner liner material; Chinese patent CN111171448A proposes a sterilization coated plastic sheet and a preparation method and application thereof, wherein at least one surface of the sterilization coated plastic sheet is covered with a sterilization film, and the sterilization film includes a sterilization nano-composite material composed of silver, copper oxide and zinc oxide, and the sterilization coated plastic sheet can be applied to the refrigerator inner liner.

[0004] However, the above antibacterial measures still have the problem of poor antibacterial effect and cannot meet the antibacterial requirements of refrigerator liner. Summary of the invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to overcome the problem that the existing antibacterial means have poor antibacterial effects and cannot meet the antibacterial requirements of the refrigerator liner, and to provide a refrigerator with good antibacterial effects.

[0006] In order to solve the technical problem, the technical solution adopted by the present invention is:

[0007] The present invention provides a refrigerator, comprising: an inner tank; the inner tank forms an inner cavity, and steel plates are attached to both sides; the steel plates comprise C, Cu, Nd, Mn, P, S, and Al; the mass fraction of Cu is selected from any value between 1.1% and 1.5%, and the mass fraction of Nd is selected from any value between 0.05% and 0.08%.

[0008] Preferably, the preparation process of the steel plate includes: a homogenization annealing step, a hot rolling step, a cold rolling step and an annealing step; the annealing temperature of the homogenization annealing step is 1230-1270° C., and the annealing time is 14.5-15.5 h.

[0009] Preferably, the annealing temperature of the annealing step is any value between 670° C. and 710° C., and the holding time is 20 min.

[0010] Preferably, the mass fraction of C is selected from any value in the range of 0.10-0.20%, the mass fraction of Mn is selected from any value in the range of 0.81-1.04%, the mass fraction of P is ≤0.015%, the mass fraction of S is ≤0.009%, and the mass fraction of Al is selected from any value in the range of 0.015-0.024%.

[0011] Preferably, the heating temperature in the hot rolling step is any value between 1170-1230°C.

[0012] Preferably, the rough rolling outlet temperature in the hot rolling step is any value between 1130-1150°C.

[0013] Preferably, the finishing rolling temperature in the hot rolling step is any value between 790-830°C.

[0014] Preferably, the coiling temperature in the hot rolling step is any value between 510-530°C.

[0015] Preferably, in the cold rolling step, the hot rolled steel strip is cold rolled at a reduction rate of 90%.

[0016] Preferably, the refrigerator further comprises an ultraviolet lamp located in the inner cavity and fixed to the top of the inner container.

[0017] Preferably, the wavelength of the ultraviolet light provided by the ultraviolet lamp to the inner cavity is 260nm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a refrigerator, wherein steel plates are attached to both sides of the inner cavity, and the mass fractions of Cu and Nd elements in the steel plates are limited. When the Cu element is added in an amount of 1.1-1.5%, the copper ion release sterilization effect is obvious. When the Nd element is added in an amount of 0.05-0.08%, the alloy grain boundary and matrix grain refinement can be purified. In addition, by limiting the annealing process, part of Cu and Nd form NdCu intermetallic compounds during the annealing process. The shear deformation degree of the {110} plane along the [1 10] direction and the {100} along the

[010] direction of the NdCu intermetallic compound are equal, and the shear deformation degree is isotropic. The alloy toughness can be significantly improved in the dispersed distribution state. The rare earth metal intermetallic compound NdCu has a positive Cauchy relationship, and the bonding between atoms is metallic, which can improve the solid solubility of the Cu element in the matrix and improve the antibacterial effect. The final matrix yield strength reaches 400-460MPa, the tensile strength is 530-580MPa, and the elongation is greater than 40%, meeting the deep drawing requirements of the liner. DETAILED DESCRIPTION

[0020] The technical scheme in the specific embodiment of the present invention is described in detail and completely below. Obviously, the described embodiment is only a part of the specific implementation of the overall technical scheme of the present invention, rather than all implementations. Based on the overall concept of the present invention, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention.

[0021] The present invention provides a refrigerator, comprising: an inner container; the inner container forms an inner cavity, and steel plates are attached to both sides; an ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, and Al; the mass fraction of Cu is selected from any value of 1.1-1.5%, and the mass fraction of Nd is selected from any value of 0.05-0.08%. The antibacterial effect of the refrigerator inner container is highly efficient and long-lasting. The above technical solution limits the mass fraction of Cu and Nd elements. The reason is that when the amount of Cu added is 1.1-1.5%, the bactericidal effect of releasing copper ions is obvious. When 0.05-0.08% Nd is added, the alloy grain boundaries and matrix grains can be purified. Specifically, by limiting the annealing process, some Cu and Nd form NdCu intermetallic compounds during the annealing process. The shear deformation degree of the {110} plane along the [1 10] direction and the {100} along the

[010] direction are equal, and they are isotropic. The alloy toughness can be significantly improved in the dispersed distribution state. The rare earth metal compound NdCu has a positive Cauchy relationship, and the bonding between atoms is metallic, which can increase the solid solubility of the Cu element in the matrix and improve the antibacterial effect. Finally, the matrix yield strength reaches 400-460MPa, the tensile strength is 530-580MPa, and the elongation is greater than 40%, which meets the deep drawing requirements of the inner liner. It can be understood that the mass fraction of the Cu element can also be 1.2%, 1.3%, 1.4% and any value within the range thereof, and the mass fraction of the Nd element can also be 0.06%, 0.07% and any value within the range thereof.

[0022] In a preferred embodiment, the preparation process of the steel plate includes: a homogenization annealing step, a hot rolling step, a cold rolling step and an annealing step; the annealing temperature of the homogenization annealing step is 1230-1270°C, and the annealing time is 14.5-15.5h. This technical solution defines the preparation process of the steel plate, and specifically defines the annealing temperature and time of the annealing step, so that the main alloy additives such as Cu and Nd can be fully dissolved in the steel matrix and evenly distributed, which is also the key to ensure that part of Cu and Nd forms NdCu intermetallic compounds during the annealing process. Furthermore, the annealing temperature of the homogenization annealing step is 1250°C, and the annealing time is 15h.

[0023] In a preferred embodiment, the annealing temperature of the annealing step is any value in the range of 670-710°C, and the holding time is 20 minutes. Specifically, the cold-rolled steel strip automatically enters the continuous annealing hot-dip galvanizing flow line step, and is annealed at 670-710°C and held for 20 minutes, so that the Cu-Nd intermetallic compound can be fully precipitated to improve the strength of the steel plate. It is understandable that the annealing temperature of the annealing step can also be 680°C, 690°C, 700°C and any point value within the range.

[0024] In a preferred embodiment, the mass fraction of C is selected from any value in the range of 0.10-0.20%, the mass fraction of Mn is selected from any value in the range of 0.81-1.04%, the mass fraction of P is ≤0.015%, the mass fraction of S is ≤0.009%, and the mass fraction of Al is selected from any value in the range of 0.015-0.024%.

[0025] In a preferred embodiment, the heating temperature in the hot rolling step is any value in the range of 1170-1230° C. It is understood that the heating temperature in the hot rolling step can also be 1180° C., 1190° C., 1200° C., 1210° C., 1220° C. and any point value in the range thereof.

[0026] In a preferred embodiment, the rough rolling outlet temperature in the hot rolling step is any value in the range of 1130-1150° C. It is understood that the rough rolling outlet temperature in the hot rolling step can also be 1135° C., 1140° C., 1145° C. and any point value in the range.

[0027] In a preferred embodiment, the finishing rolling temperature in the hot rolling step is any value in the range of 790-830° C. It is understood that the finishing rolling temperature in the hot rolling step can also be 800° C., 810° C., 820° C. and any point value in the range.

[0028] In a preferred embodiment, the coiling temperature in the hot rolling step is any value in the range of 510-530° C. It is understood that the coiling temperature in the hot rolling step can also be 515° C., 520° C., 525° C. and any point in the range thereof.

[0029] In a preferred embodiment, in the cold rolling step, the hot rolled steel strip is cold rolled at a reduction ratio of 90%.

[0030] In a preferred embodiment, the refrigerator further comprises an ultraviolet lamp located in the inner cavity and fixed to the top of the inner tank. This embodiment defines that there is an ultraviolet light source at the top of the inner tank of the refrigerator, and antibacterial steel plates are attached to both sides of the inner tank, each of which has an antibacterial effect. The inner tank material is a high-strength and high-toughness antibacterial steel plate, and the ultraviolet light can irradiate the air in the tank and the inner surface of the tank, and the inner tank material and ultraviolet light can synergistically sterilize. The sterilization effect of the refrigerator comes from the following aspects: First, the ultraviolet light located at the top of the refrigerator liner can sterilize and purify the air in the box; second, the antibacterial steel plate itself has antibacterial and antibacterial functions. Adding Cu elements to steel can have an antibacterial effect, and when the Cu element is added in an amount of 1.1-1.5%, the copper ion release has a significant sterilization effect. When 0.05-0.08% Nd elements are added, the alloy grain boundaries and matrix grains can be purified, and Cu-Nd intermetallic compounds can be formed at the same time, which improves the elongation of the alloy, and finally achieves a matrix yield strength of 400-460MPa and a tensile strength of 530-5 80MPa, and the elongation is greater than 40%, which meets the deep drawing requirements of the inner liner; third, under the excitation of ultraviolet light, it can promote the migration and aggregation of copper ions on the surface of the steel plate. The principle is that when ultraviolet light irradiates the surface of the copper body, the photon energy is absorbed by the oxide film, causing the electrons in the oxide film to be excited to a higher energy level, forming photogenerated electrons and hole pairs. These electrons and hole pairs migrate to the metal / oxide film interface under the action of the built-in electric field. This photochemical reaction accelerates the precipitation of copper ions and enhances the sterilization effect of the substrate. At the same time, ultraviolet rays have higher energy and can excite electron transitions inside molecules, thereby accelerating the conversion of precipitated copper into copper ions.

[0031] In a preferred embodiment, the wavelength of ultraviolet light provided by the ultraviolet lamp to the inner cavity is 260nm, which has the strongest bactericidal effect and the best synergistic bactericidal effect with the antibacterial steel plate.

[0032] Regarding the above refrigerator, the inner liner material is any one of ABS, HIPS or PP or a composite material.

[0033] In order to more clearly and in detail introduce the refrigerator provided by the embodiment of the present invention, it will be described below in conjunction with specific embodiments.

[0034] Example 1

[0035] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0036] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.05%, Nd: 0.01%, and the remainder is Fe and impurities.

[0037] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold rolled at a reduction rate of 90%; in the annealing step, annealing is performed at 670-710° C. and the holding time is 6-8 minutes.

[0038] Sterilization is carried out with ultraviolet light of 260nm wavelength.

[0039] Example 2

[0040] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0041] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.07%, Nd: 0.04%, and the remainder is Fe and impurities.

[0042] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1230°C and the annealing time is 14.5h; the heating temperature in the hot rolling step is 1170-1230°C, the rough rolling outlet temperature is 1130-1150°C, the finishing rolling temperature is 790-830°C, and the coiling temperature is 510-530°C; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold rolled at a reduction rate of 90%; in the annealing step, annealing is performed at 670-710°C and the holding time is 6-8min.

[0043] Sterilization is carried out with ultraviolet light of 260nm wavelength.

[0044] Example 3

[0045] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0046] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.13%, Nd: 0.07%, and the remainder is Fe and impurities.

[0047] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1270°C and the annealing time is 15.5h; the heating temperature in the hot rolling step is 1170-1230°C, the rough rolling outlet temperature is 1130-1150°C, the finishing rolling temperature is 790-830°C, and the coiling temperature is 510-530°C; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold rolled at a reduction rate of 90%; in the annealing step, annealing is performed at 670-710°C and the holding time is 6-8min.

[0048] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0049] Example 4

[0050] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0051] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.09%, and the remainder is Fe and impurities.

[0052] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1240° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 6-8 minutes.

[0053] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0054] Example 5

[0055] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0056] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.15%, Nd: 0.07%, and the remainder is Fe and impurities.

[0057] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1260° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 8-10 minutes.

[0058] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0059] Example 6

[0060] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0061] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.07%, and the balance is Fe and impurities.

[0062] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 4-6 minutes.

[0063] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0064] Example 7

[0065] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0066] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.07%, and the balance is Fe and impurities.

[0067] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 2-4 minutes.

[0068] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0069] Example 8

[0070] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0071] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.07%, and the balance is Fe and impurities.

[0072] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 1-2 minutes.

[0073] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 260nm.

[0074] Comparative Example 1

[0075] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0076] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.09%, and the remainder is Fe and impurities.

[0077] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 6-8 minutes.

[0078] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 220nm.

[0079] Comparative Example 2

[0080] A refrigerator comprises: an inner container and an ultraviolet lamp; the inner container forms an inner cavity, and steel plates are attached to both sides; the ultraviolet lamp is located in the inner cavity and fixed to the top of the inner container; the steel plate comprises C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0081] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.09%, and the remainder is Fe and impurities.

[0082] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 6-8 minutes.

[0083] The refrigerator liner 1 is affixed with the above-mentioned antibacterial steel plate 3, the ultraviolet lamp 2 is fixed to the top of the refrigerator liner 1 by fixing screws 24, and the antibacterial steel plate 3 is affixed to both sides of the refrigerator liner 1 by gluing, and also includes a lamp trough 4 and a wire outlet 5. Four lamp beads 21 are arranged on each lamp fixing plate 23, and the lamp beads 21 are fixed to the lamp fixing plate 23 by a lamp holder 22. The lamp beads 21 are connected in series, and the depth of the wiring groove 25 is 0.5mm. The gap between the lamp fixing plate 23 and the lamp trough 4 is 1mm, leaving space for the ultraviolet lamp line. Sterilization is carried out with ultraviolet light of a wavelength of 300nm.

[0084] Comparative Example 3

[0085] A refrigerator comprises an inner tank, wherein the inner tank forms an inner cavity and steel plates are attached to both sides thereof; the steel plates comprise C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0086] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 1.16%, Nd: 0.09%, and the remainder is Fe and impurities.

[0087] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; cold rolling process parameters: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 6-8 minutes.

[0088] No UV light

[0089] Comparative Example 4

[0090] A refrigerator comprises an inner tank, wherein the inner tank forms an inner cavity and steel plates are attached to both sides thereof; the steel plates comprise C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0091] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.97%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: ≤0.001%, Nd: ≤0.001%, and the balance is Fe and impurities.

[0092] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 50-60 seconds.

[0093] No UV light

[0094] Comparative Example 5

[0095] A refrigerator comprises an inner tank, wherein the inner tank forms an inner cavity and steel plates are attached to both sides thereof; the steel plates comprise C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0096] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 0.4%, Nd: ≤0.001%, and the remainder is Fe and impurities.

[0097] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 50-60 seconds.

[0098] No UV light

[0099] Comparative Example 6

[0100] A refrigerator comprises an inner tank, wherein the inner tank forms an inner cavity and steel plates are attached to both sides thereof; the steel plates comprise C, Cu, Nd, Mn, P, S, Al, or Fe and impurities.

[0101] In the above steel plate, by mass fraction, C: 0.18%, Mn: 0.96%, P: ≤0.015%, S: ≤0.009%, Al: 0.02%, Cu: 0.8%, Nd: ≤0.001%, and the remainder is Fe and impurities.

[0102] The steel plate is manufactured according to a homogenizing annealing step, a hot rolling step, a cold rolling step and an annealing step, wherein the annealing temperature of the homogenizing annealing step is 1250° C. and the annealing time is 15 hours; the heating temperature in the hot rolling step is 1170-1230° C., the rough rolling outlet temperature is 1130-1150° C., the finishing rolling temperature is 790-830° C., and the coiling temperature is 510-530° C.; the cold rolling process parameters are as follows: the hot-rolled steel strip is cold-rolled at a reduction rate of 90%; the cold-rolled steel strip automatically enters a continuous annealing line and is annealed at 670-710° C. for 50-60 seconds.

[0103] No UV light

[0104] Performance Testing

[0105] The products of the above embodiments and comparative examples were subjected to relevant performance tests, and the test results are shown in Table 1, so as to provide the mechanical properties of the products manufactured according to the method (including chemical composition and process) of the present invention.

[0106] Table 1 Performance test data of embodiments and comparative examples

[0107]

[0108] It can be found from Table 1 that by using the alloy addition method mainly based on C-Cu-Mn-Al-Ti and combining it with a suitable production process, galvanized steel coils with thickness and mechanical properties that meet the requirements can be produced, and their anti-staphylococcus rate can reach 99.9%.

Claims

1. A refrigerator, characterized in that: include: The liner forms an inner cavity, with steel plates attached on both sides; The steel plate comprises C, Cu, Nd, Mn, P, S and Al; the mass fraction of Cu is selected from any value between 1.1% and 1.5%, and the mass fraction of Nd is selected from any value between 0.05% and 0.08%.

2. The refrigerator according to claim 1, characterized in that: The preparation process of the steel plate includes: a homogenization annealing step, a hot rolling step, a cold rolling step and an annealing step; the annealing temperature of the homogenization annealing step is 1230-1270° C., and the annealing time is 14.5-15.5 hours.

3. The refrigerator according to claim 2, characterized in that: The annealing temperature of the annealing step is any value between 670° C. and 710° C., and the holding time is 20 minutes.

4. The refrigerator according to claim 1, characterized in that: The mass fraction of C is selected from any value in the range of 0.10-0.20%, the mass fraction of Mn is selected from any value in the range of 0.81-1.04%, the mass fraction of P is ≤0.015%, the mass fraction of S is ≤0.009%, and the mass fraction of Al is selected from any value in the range of 0.015-0.024%.

5. The refrigerator according to claim 2, characterized in that: The heating temperature in the hot rolling step is any value between 1170-1230°C.

6. The refrigerator according to claim 2, characterized in that: The rough rolling outlet temperature in the hot rolling step is any value between 1130-1150°C; the finishing rolling temperature in the hot rolling step is any value between 790-830°C.

7. The refrigerator according to claim 2, characterized in that: The coiling temperature in the hot rolling step is any value in the range of 510-530°C.

8. The refrigerator according to claim 2, characterized in that: In the cold rolling step, the hot rolled steel strip is cold rolled at a reduction ratio of 90%.

9. The refrigerator according to claim 1, characterized in that: The refrigerator also includes an ultraviolet lamp located in the inner cavity and fixed to the top of the inner container.

10. The refrigerator according to claim 9, characterized in that: The wavelength of the ultraviolet light provided by the ultraviolet lamp to the inner cavity is 260nm.

Images