CN108618631B

CN108618631B - Cooking appliance and sterilization method

Info

Publication number: CN108618631B
Application number: CN201710165684.4A
Authority: CN
Inventors: 房振; 王新元; 严平; 苏莹; 李晶
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2017-03-20
Filing date: 2017-03-20
Publication date: 2021-12-17
Anticipated expiration: 2037-03-20
Also published as: CN108618631A

Abstract

The present invention provides a cooking appliance and a sterilization method, the cooking appliance including: a body; the inner pot is arranged in the machine body; the upper cover is buckled above the inner pot and is provided with a through hole and an ultraviolet light source part which is arranged in the upper cover; the light guide body is arranged in the upper cover, one end of the light guide body is connected with the ultraviolet light source part, the other end of the light guide body penetrates through the through hole, and light emitted by the ultraviolet light source part irradiates the inner pot through the light guide body. According to the cooking appliance provided by the invention, the light guide body is arranged to guide the light emitted by the ultraviolet light source part into the inner pot and irradiate the inner pot so as to realize ultraviolet sterilization on the inner pot, so that the food material spoilage caused by the microbial propagation is avoided, and the subsequent cooking or the reserved cooking is not influenced; meanwhile, the light guide body plugs the through hole, high-temperature gas and liquid generated in the cooking process are prevented from passing through the through hole to the ultraviolet light source piece, the influence of high temperature and high humidity on the ultraviolet light source piece and related circuits is avoided, the system reliability is improved, and the service life of the ultraviolet light source piece is prolonged.

Description

Cooking appliance and sterilization method

Technical Field

The invention relates to the technical field of household appliances, in particular to a cooking appliance and a sterilization method.

Background

The products of the existing cooking appliances such as the electric cooker and the like have reservation functions, but only provide time operation for users, and do not guarantee the quality of rice in the reservation process, for example, when the weather is hot and the reservation time is long, the rice is soaked for a long time to breed bacteria, so that the rice is rotten and smelly, and although the rice can be reserved for a long time, the reservation cooking cannot guarantee the practicability. When the appointed time is long, some electric cookers usually cook rice first and then keep fresh by means of heat sterilization, such as vacuum negative pressure preservation technology, vacuum pressurization preservation technology, and the like. However, the heat sterilization method needs to heat and maintain the food at a certain temperature, and water is easily lost at a high temperature, so that the taste of the cooked rice is also poor under the condition of long heat preservation time.

Disclosure of Invention

In order to solve at least one of the above technical problems, an embodiment of a first aspect of the present invention proposes a cooking appliance.

Embodiments of the second aspect of the present invention also provide a sterilization method.

In view of this, according to an embodiment of the first aspect of the present invention, the present invention provides a cooking appliance, including: the inner pot is arranged in the machine body; the upper cover is buckled above the inner pot and is provided with a through hole and an ultraviolet light source part which is arranged in the upper cover; the light guide body is arranged in the upper cover, one end of the light guide body is connected with the ultraviolet light source part, the other end of the light guide body penetrates through the through hole, and light emitted by the ultraviolet light source part irradiates the inner pot through the light guide body.

According to the cooking appliance provided by the invention, the light guide body is arranged to guide the light emitted by the ultraviolet light source part into the inner pot and irradiate the inner pot so as to realize ultraviolet sterilization on the inner pot, so that the food material spoilage caused by the microbial propagation is avoided, and the subsequent cooking or the reserved cooking is not influenced; meanwhile, the light guide body plugs the through hole, high-temperature gas and liquid generated in the cooking process are prevented from passing through the through hole to the ultraviolet light source piece, the influence of high temperature and high humidity on the ultraviolet light source piece and related circuits of the ultraviolet light source piece is avoided, the reliability of the system is improved, and the service life of the ultraviolet light source piece is prolonged. When the light guide body is arranged, one end of the light guide body, which is arranged in the inner pot, extends out of the through hole so as to realize a larger irradiation range and improve the sterilization effect.

In addition, the cooking utensil in the above embodiment provided by the invention may also have the following additional technical features:

in the above technical solution, preferably, an end of the light guide body passing through the through hole is hemispherical.

In this technical scheme, through the one end that passes the through-hole with the light guide body be the hemisphere for the pot in can the wider and more evenly shine by the light energy that the light guide body was derived, enlarge the scope of disinfecting to the pot in, reduce the dead angle that the light that disinfects shines, promote bactericidal effect, avoid rotten, influence the quality and the safety of culinary art food because of the edible material that the microorganism breeds and lead to, guarantee the culinary art effect when reservation culinary art.

In any of the above technical solutions, preferably, the method further includes: and the sealing ring is arranged on the light guide body and is positioned at one end of the light guide body penetrating through the through hole, and the sealing ring is matched with the through hole.

In this technical scheme, through setting up the sealing washer, promote the sealing performance between light guide and the through-hole, further prevent that high temperature and high humidity's gas or liquid from permeating through the through-hole and influencing ultraviolet source spare and relevant circuit, promote the holistic reliability of system, prolong the life of ultraviolet source spare.

In any of the above technical solutions, preferably, the ultraviolet light source is an ultraviolet LED lamp.

In this technical scheme, through adopting nontoxic harmless ultraviolet LED lamp, it has small, efficient advantage, can effectively improve space utilization in the device, bactericidal effect and security performance, has avoided bursting easily or revealing mercury in the traditional ultraviolet mercury lamp fluorescent tube use simultaneously for mercury in the ultraviolet mercury lamp fluorescent tube falls into food, thereby causes the food safety hidden danger of mercury poisoning, influences the health.

In any one of the above technical solutions, preferably, the light guide is a glass fiber light guide.

In this technical scheme, can promote the leaded light efficiency of light conductor through adopting the glass fiber light conductor, guarantee the bactericidal effect of ultraviolet light source spare, glass fiber's plasticity is good simultaneously, can be fit for more manifold shape requirement and assembly requirement to soft glass fiber light conductor can more closely cooperate with the through-hole, guarantees its and the sealing performance between the through-hole.

In any of the above technical solutions, preferably, the ultraviolet light source and the light guide are of an integrated structure.

In this technical scheme, through setting up ultraviolet source spare and light conductor into the structure of integral type, be favorable to reducing the occupation space of ultraviolet source spare and light conductor, can promote the sealing performance between ultraviolet source spare and the light conductor simultaneously for as much as possible light shines disinfection and sterilization in the pot in through the light conductor, restrain the microorganism and breed, prevent that food is rotten, and the ultraviolet source spare and the light conductor of integral type can reduce the assembly flow, promote assembly efficiency.

In any of the above technical solutions, preferably, the ultraviolet light source unit is detachably disposed in the upper cover.

In this technical scheme, ultraviolet source spare passes through installation forms such as buckle or mounting groove and installs in the upper cover to be convenient for maintenance and maintenance, the ultraviolet source spare of being convenient for simultaneously changes when reaching life, and can make ultraviolet source spare the standard piece form, in order to adapt to different products, promote the suitability of ultraviolet source spare to the product.

In any of the above technical solutions, preferably, the light guide is detachably provided in the upper cover.

In this technical scheme, the light guide passes through installation forms such as buckle or mounting groove and installs in the upper cover to in maintenance and maintenance, and can make the light guide into the standard component form, with the product of adaptation difference, promote the suitability of light guide to the product.

In any one of the above technical solutions, preferably, the upper cover is provided with an installation groove, and the ultraviolet light source and the light guide are arranged on the installation groove.

In this technical scheme, through set up mounting groove installation ultraviolet source spare and light conductor on the upper cover, simplify assembly structure, promote the reliability and the convenience of assembly. Meanwhile, a positioning groove can be formed in the mounting groove or a positioning mechanism is additionally arranged to position the ultraviolet light source piece and the light guide body, so that the assembly quality is further guaranteed, and the reliability of the device is improved.

In any of the above technical solutions, preferably, the cooking appliance is an electric cooker, a pressure cooker, a stew pan or a soymilk maker.

In this technical scheme, through set up ultraviolet source spare and light conductor on electric rice cooker, pressure cooker, saucepan or soybean milk machine for it can effectively guarantee to avoid because of the edible material corruption that the microorganism breeds and lead to is rotten at the in-process of long-time culinary art or reservation culinary art, guarantees the normal clear of reservation culinary art, promotes the taste of culinary art food.

The invention provides a cooking appliance with a reservation fresh-keeping function, which is characterized in that an ultraviolet emitting device is arranged on an upper cover, ultraviolet irradiation is carried out on rice, water or other food materials in a pot, microbial propagation in a high-temperature state is inhibited, and long-time reservation is ensured without causing sourness and odor of the rice or other food materials to influence normal cooking. In addition, the ultraviolet light source introduces ultraviolet rays into the irradiated cavity (generally an inner pot) through the light guide body, so that the ultraviolet light source is isolated from a heat source and water vapor, and the reliability of the system is improved.

Embodiments of the second aspect of the present invention also provide a sterilization method for a cooking apparatus, including: receiving a cooking appointment instruction, turning on an ultraviolet light source piece of the cooking device to start sterilization, turning off the ultraviolet light source piece to stop sterilization after the cooking appointment time is reached, wherein light emitted by the ultraviolet light source piece irradiates an inner pot of the cooking device through a light guide body of the cooking device.

According to the sterilization method provided by the invention, the inner pot of the cooking device is sterilized and disinfected by ultraviolet rays in the cooking appointment stage, so that the materials in the inner pot are prevented from being corrupted and deteriorated due to long-time placement, soaking or dampness and the like, and the normal use of the cooking device and the safety and taste of cooked food are not influenced. And the light guide body isolates the ultraviolet light source part from high-temperature gas and liquid, thereby avoiding the influence of high temperature and high humidity on the ultraviolet light source part and related circuits thereof, improving the reliability of the system and prolonging the service life of the ultraviolet light source part.

In addition, the sterilization method in the above embodiment provided by the present invention may further have the following additional technical features:

in the above technical solution, preferably, after the ultraviolet light source is turned on to start sterilization, the method further includes: step S102, turning off the ultraviolet light source after a first preset time; and step S104, turning on the ultraviolet light source after a second preset time and returning to the step S102.

In the technical scheme, the ultraviolet light source part adopts a time-sharing sterilization mode, the sterilization is suspended after the first preset time of sterilization, and the sterilization is restarted after the second preset time, so that the good sterilization effect is ensured, the food spoilage is avoided, the energy consumption is saved, the loss caused by long-time use of the ultraviolet light source part is reduced, the local overheating is avoided, and the service life of the ultraviolet light source part is prolonged.

In any of the above technical solutions, preferably, the duration of the first preset time ranges from 5 minutes to 15 minutes; the second preset time is in a range of 40 minutes to 60 minutes.

In the technical scheme, the ultraviolet light source is paused for 40 to 60 minutes every 5 to 15 minutes when the ultraviolet light source is started in the reservation waiting period, so that a good sterilization effect is ensured, food spoilage is avoided, meanwhile, the loss caused by long-time use of the ultraviolet light source is reduced, local overheating is avoided, and the service life of the ultraviolet light source is prolonged. The first preset time and the second preset time can be specifically set and adjusted according to the type, the stock and the like of the materials.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic structural diagram in another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the ultraviolet LED module of FIG. 2;

FIG. 4 is a bottom view of the structure shown in FIG. 3;

FIG. 5 is a schematic flow chart diagram of one embodiment of the present invention;

FIG. 6 is a flow chart of an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

1 cooking utensil, 102 inner pan, 104 upper cover, 1042 through hole, 106 ultraviolet light source component, 108 light guide body, 110 body, 112 ultraviolet LED module, 114 circuit board, 116 ultraviolet LED lamp, 118 shell.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A cooking appliance according to some embodiments of the present invention will be described below with reference to fig. 1 to 4.

As shown in fig. 1, the present invention provides a cooking appliance 1 including: the body, the inner pan 102, is arranged in the body; the upper cover 104, the upper cover 104 is buckled above the inner pan 102, the upper cover 104 has through holes 1042, the ultraviolet light source 106, set up in the upper cover 104; and a light guide 108 disposed in the upper cover 104, wherein one end of the light guide 108 is connected to the ultraviolet light source 106, and the other end passes through the through hole 1042, and light emitted from the ultraviolet light source 106 is irradiated to the inner pot 102 through the light guide 108. Wherein the fuselage is not shown.

According to the cooking appliance 1 provided by the invention, the light guide body 108 is arranged to guide the light emitted by the ultraviolet light source 106 into the inner pot 102 and irradiate the inner pot 102 so as to realize ultraviolet sterilization on the inner pot 102, so that the food material spoilage caused by the propagation of microorganisms is avoided, and the subsequent cooking or the reserved cooking is not influenced; meanwhile, the light guide 108 seals the through hole 1042, so that high-temperature gas and liquid generated in the cooking process are prevented from passing through the through hole 1042 to the ultraviolet light source 106, the influence of high temperature and high humidity on the ultraviolet light source 106 and related circuits thereof is avoided, the reliability of the system is improved, and the service life of the ultraviolet light source 106 is prolonged. When the light guide 108 is disposed, one end of the light guide disposed on the inner pot 102 may extend out of the through hole 1042 to achieve a larger irradiation range, thereby improving the sterilization effect.

In one embodiment of the present invention, preferably, one end of the light guide 108 passing through the through hole 1042 is hemispherical.

In this embodiment, the end of the light guide 108 passing through the through hole 1042 is hemispherical, so that the light guided out by the light guide 108 can irradiate the inner pot 102 more uniformly in a wider range, the sterilization range of the inner pot 102 is enlarged, the dead angle of sterilization light irradiation is reduced, the sterilization effect is improved, the food material spoilage caused by the propagation of microorganisms and the influence on the quality and safety of cooked food are avoided, and the cooking effect during the reserved cooking is ensured.

In one embodiment of the present invention, preferably, one end of the light guide 108 passing through the through hole 1042 is spherical.

In this embodiment, the spherical end of the light guide 108 penetrating through the through hole 1042 is spherical, and the spherical light guide 108 can irradiate the inner pot 102 in a wider range, so as to achieve a better and more uniform disinfection and sterilization effect, avoid food material spoilage and influence on quality and safety of cooked food due to microbial propagation, and ensure a cooking effect during reserved cooking.

In one embodiment of the present invention, preferably, the method further includes: and the sealing ring is arranged on the light guide body 108 and positioned at one end of the light guide body 108 penetrating through the through hole 1042, and the sealing ring is matched with the through hole 1042.

In this embodiment, by providing the sealing ring, the sealing performance between the light guide 108 and the through hole 1042 is improved, and further, the ultraviolet light source 106 and the related circuits thereof are prevented from being affected by the high-temperature and high-humidity gas or liquid penetrating through the through hole 1042, so that the reliability of the whole system is improved, and the service life of the ultraviolet light source 106 is prolonged. Generally, the sealing ring can be made of non-toxic and harmless soft non-metallic materials such as rubber, so that the adaptability and the sealing performance of assembly can be improved, and the safety of cooking food is ensured.

In one embodiment of the present invention, preferably, as shown in fig. 2 to 4, the uv light source 106 is a uv LED lamp 116.

In this embodiment, through adopting nontoxic harmless ultraviolet LED lamp 116, it has small, efficient advantage, can effectively improve space utilization in the device, bactericidal effect and security performance, has avoided simultaneously that traditional ultraviolet mercury lamp fluorescent tube explodes easily or reveals mercury in the use for mercury in the ultraviolet mercury lamp fluorescent tube falls into food, thereby causes the food security hidden danger of mercury poisoning, influences human health.

In an embodiment of the present invention, as shown in fig. 2 to 4, preferably, an inner pot 102 is disposed inside a body 110, an upper cover 104 is disposed above the body 110, an ultraviolet LED module 112 is disposed in the upper cover 104, and the ultraviolet LED module 112 includes a housing 118, a circuit board 114, an ultraviolet LED lamp 116, and a light guide 108.

In this embodiment, by modularly disposing the sterilizing part in the upper cover 104, a part of the light guide 108 protrudes out of the upper cover 104 to sterilize the inner pot 102 and the food therein. As shown in fig. 2, the ultraviolet LED module 112 is disposed above the inner pot 102, wherein the ultraviolet LED lamp 116 emits light and sterilizes the inner pot 102 through the light guide; as shown in fig. 3 and 4, the circuit board 114 and the light guide member are respectively disposed on the housing 118, the ultraviolet LED lamp 116 is disposed on the circuit board 114 in a patch or plug-in manner, when cooking is scheduled or sterilization and preservation are required, the circuit board 114 is powered on, and the ultraviolet LED lamp 116 emits UV ultraviolet light to irradiate the inner pot 102 and sterilize the cooked food. Wherein, the leaded light spare can be glass fiber material, also can select for use transparent glass etc to adopt sealed processing between transparent glass and the shell 118, in order playing waterproof function, prevent simultaneously that high temperature and high humidity's gas or liquid from permeating transparent glass and getting into the shell 118 in the culinary art process, damage circuit board 114 or ultraviolet LED lamp 116.

In one embodiment of the present invention, preferably, the light guide 108 is a fiberglass light guide 108.

In this embodiment, the light guide efficiency of the light guide 108 can be improved by using the glass fiber light guide 108, the sterilization effect of the ultraviolet light source 106 is ensured, meanwhile, the plasticity of the glass fiber is good, and the light guide 108 can meet more various shape requirements and assembly requirements, and the soft glass fiber light guide 108 can be more closely matched with the through hole 1042, so that the sealing performance between the light guide and the through hole 1042 is ensured.

In one embodiment of the present invention, the ultraviolet light source 106 and the light guide 108 are preferably an integral structure.

In this embodiment, through setting up ultraviolet source piece 106 and light guide 108 to the structure of integral type, be favorable to reducing the occupation space of ultraviolet source piece 106 and light guide 108, can promote the sealing performance between ultraviolet source piece 106 and the light guide 108 simultaneously for as much light as possible shines disinfection and sterilization in pot 102 in through light guide 108, restrain the microorganism reproduction, prevent that food spoilage from deteriorating, and the ultraviolet source piece 106 and the light guide 108 of integral type can reduce the assembly flow, promote assembly efficiency.

In one embodiment of the present invention, it is preferable that the ultraviolet light source unit 106 be detachably provided in the upper cover 104.

In this embodiment, the uv light source 106 is installed in the upper cover 104 in a fastening or installation manner such as an installation groove, so as to facilitate maintenance and repair, and at the same time, the uv light source 106 is replaced when reaching the service life, and the uv light source 106 can be made into a standard form to adapt to different products, thereby improving the adaptability of the uv light source 106 to the products.

In one embodiment of the present invention, preferably, the light guide 108 is detachably provided in the upper cover 104.

In this embodiment, the light guide 108 is installed in the upper cover 104 in a mounting manner such as a snap or a mounting groove, so as to facilitate maintenance and repair, and the light guide 108 may be made into a standard form to adapt to different products, thereby improving the adaptability of the light guide 108 to the products.

In one embodiment of the present invention, it is preferable that the upper cover 104 is provided with a mounting groove on which the ultraviolet light source piece 106 and the light guide 108 are disposed.

In this embodiment, the ultraviolet light source 106 and the light guide 108 are mounted by providing the mounting groove on the upper cover 104, so that the assembly structure is simplified, and the reliability and convenience of assembly are improved. Meanwhile, a positioning groove can be formed in the mounting groove or a positioning mechanism is additionally arranged to position the ultraviolet light source piece 106 and the light guide body 108, so that the assembly quality is further guaranteed, and the reliability of the device is improved.

In one embodiment of the present invention, preferably, the cooking appliance 1 is an electric cooker, a pressure cooker, a stew pan or a soymilk maker.

In this embodiment, through set up ultraviolet source spare 106 and light guide 108 on electric rice cooker, pressure cooker, stew pot or soybean milk machine for it can effectively guarantee to avoid because of the food material corruption that the microorganism breeds and lead to is rotten at the in-process of long-time culinary art or reservation culinary art, guarantees the normal clear of reservation culinary art, promotes the taste of culinary art food.

In one embodiment of the present invention, the ultraviolet light source unit 106 is preferably turned on and off periodically during the sterilization process.

In this embodiment, in the cooking appointment stage or the sterilization process, the ultraviolet light source 106 may be turned on and off intermittently to sterilize, so as to ensure a good sterilization effect, save energy consumption, avoid local heating and over-high temperature, reduce the loss of the ultraviolet light source 106, and prolong the service life of the ultraviolet light source 106. Generally, the ultraviolet light source can be intermittent irradiation, and the irradiation is carried out for 5 to 15 minutes per hour, so that the influence on overall heating, the service life of the light source and the like due to too long irradiation is avoided.

The present invention also provides a sterilization method, as shown in fig. 5, the present invention provides a sterilization method for a cooking apparatus, including: and step S50, receiving the cooking appointment instruction, turning on the ultraviolet light source part of the cooking device to start sterilization, turning off the ultraviolet light source part to stop sterilization after the cooking appointment time is reached, wherein light emitted by the ultraviolet light source part irradiates the inner pot of the cooking device through the light guide body of the cooking device.

In one embodiment of the present invention, preferably, as shown in fig. 6, includes: step S602, receiving an appointment cooking instruction;

step S604, turning on the ultraviolet light source part for a first preset time;

step S606, turning off the ultraviolet light source for a second preset time;

step S608, determining whether the cooking time is up to the scheduled cooking time;

if the cooking time is not up to the preset cooking time, returning to the step S604 to continue sterilization;

if the cooking time is up to the scheduled time, the step S610 is performed;

step S610, turning off the ultraviolet light source device.

In the embodiment, the working cycle of sterilization of the ultraviolet light source part is set by setting the first preset time and the second preset time, and when the time for reserving cooking is not reached, the sterilization process is circulated to repeatedly sterilize the cooking device, so that the long-time sterilization effect is favorably improved, and meanwhile, the local heating caused by long-time irradiation can be avoided; and when the time of reservation culinary art has been reached, then remove the sealing member to the through-hole of cooking device upper cover on, guarantee the sealed of through-hole, prevent that high temperature and high humidity from influencing ultraviolet source spare, guarantee cooking device's normal culinary art simultaneously. Meanwhile, it is to be added that this embodiment merely provides an intermittent sterilization control method, and if it is detected that the time for scheduled cooking has been reached while sterilization is in progress, sterilization may be immediately stopped and a subsequent cooking process may be performed.

In one embodiment of the present invention, preferably, the first preset time is in a range of 5 minutes to 15 minutes; the second preset time is in a range of 40 minutes to 60 minutes.

In the embodiment, the ultraviolet light source is paused for 40 to 60 minutes every 5 to 15 minutes during the reservation waiting period, so that not only is good sterilization effect ensured and food spoilage is avoided, but also the loss caused by using the ultraviolet light source for a long time is reduced, local overheating is avoided and the service life of the ultraviolet light source is prolonged. The first preset time and the second preset time can be specifically set and adjusted according to the type, the stock and the like of the materials.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooking appliance, comprising:

a body;

the inner pot is arranged in the machine body;

the upper cover is buckled above the inner pot and is provided with a through hole;

the ultraviolet light source piece is arranged in the upper cover;

the light guide body is arranged in the upper cover, one end of the light guide body is connected with the ultraviolet light source part, the other end of the light guide body penetrates through the through hole, and light emitted by the ultraviolet light source part irradiates the inner pot through the light guide body; one end of the light guide body penetrating through the through hole is hemispherical;

the sealing ring is arranged on the light guide body and is positioned at one end of the light guide body penetrating through the through hole, and the sealing ring is matched with the through hole;

the ultraviolet light source part and the light guide body are of an integrated structure.

2. The cooking appliance of claim 1,

the ultraviolet light source is an ultraviolet LED lamp.

3. The cooking appliance of claim 1,

the light guide body is a glass fiber light guide body.

4. The cooking appliance of claim 1,

the ultraviolet light source part is detachably arranged in the upper cover.

5. The cooking appliance of claim 4,

the light guide body is detachably arranged in the upper cover.

6. The cooking appliance of claim 1,

the upper cover is provided with an installation groove, and the ultraviolet light source piece and the light guide body are arranged on the installation groove.

7. The cooking appliance of claim 1,

the cooking utensil is an electric cooker, a pressure cooker, a stew pot or a soybean milk machine.

8. A sterilization method for a cooking apparatus, the sterilization method comprising:

receiving a cooking appointment instruction, turning on an ultraviolet light source part of the cooking device to start sterilization, and turning off the ultraviolet light source part to stop sterilization after the cooking appointment time is reached, wherein light emitted by the ultraviolet light source part irradiates an inner pot of the cooking device through a light guide body of the cooking device, and one end of the light guide body penetrating through a through hole is hemispherical;

the ultraviolet light source part is arranged in an upper cover of the cooking appliance, the upper cover is provided with a through hole, the cooking device further comprises a sealing ring, the sealing ring is arranged on the light guide body and is positioned at one end of the light guide body penetrating through the through hole, and the sealing ring is matched with the through hole;

after the ultraviolet light source is turned on to start sterilization, the method further comprises the following steps:

step S102, turning off the ultraviolet light source after a first preset time;

and step S104, turning on the ultraviolet light source after a second preset time and returning to the step S102.

9. The sterilization method according to claim 8,

the duration range of the first preset time is 5 minutes to 15 minutes;

the duration of the second preset time ranges from 40 minutes to 60 minutes.