CN110403452B

CN110403452B - Electric cooking appliance

Info

Publication number: CN110403452B
Application number: CN201910818050.3A
Authority: CN
Inventors: 张振华; 周宇; 唐相伟
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-05-25
Anticipated expiration: 2039-08-30
Also published as: CN110403452A

Abstract

The invention discloses a cooking appliance, comprising: a body and a light emitting device. Inject the culinary art chamber in the organism, be equipped with photocatalysis portion in the culinary art intracavity, photocatalysis portion includes the photocatalyst, and light emitting device establishes on the organism, and the light that light emitting device sent is suitable for shining photocatalysis portion with the excitation photocatalyst. According to the cooking appliance provided by the embodiment of the invention, the photocatalytic part with the photocatalyst and the light-emitting device suitable for irradiating the photocatalytic part are arranged in the cooking cavity, when the peculiar smell of the cooking cavity of the cooking appliance needs to be removed, the light-emitting device can be started, so that the light emitted by the light-emitting device irradiates the photocatalytic part to excite the photocatalyst of the photocatalytic part, organic substances remained in the cooking cavity can be decomposed, the peculiar smell in the cooking cavity is removed, the cooking appliance can not leave the peculiar smell after cooking, the smell tainting and the food material pollution are prevented, and a good cooking environment is provided for a user.

Description

Electric cooking appliance

Technical Field

The invention relates to the field of kitchen appliances, in particular to a cooking appliance.

Background

In the related art, after some kitchen appliances with certain sealing performance cook food, due to good closed environment and high relative humidity, odor molecules generated in the cooking process can be continuously oxidized and fermented in the cooking appliances, and nausea and peculiar smell are generated, and the nature of the peculiar smell is some volatile organic compounds. In addition, the peculiar smell exists for a long time, influences the next cooking effect, is easy to generate smell channeling and causes pollution to food materials.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a cooking appliance that can achieve removal of odors inside a cooking cavity.

The invention also provides a method for removing the peculiar smell of the cooking appliance.

The cooking appliance according to the embodiment of the first aspect of the invention comprises: the cooking device comprises a machine body, a cooking cavity and a light source, wherein a photocatalysis part is arranged in the cooking cavity and comprises a photocatalyst; and the light emitting device is arranged on the machine body, and light emitted by the light emitting device is suitable for irradiating the photocatalytic part to excite the photocatalyst.

According to the cooking appliance provided by the embodiment of the invention, the photocatalytic part with the photocatalyst and the light-emitting device suitable for irradiating the photocatalytic part are arranged in the cooking cavity, when the peculiar smell of the cooking cavity of the cooking appliance needs to be removed, the light-emitting device can be started, so that the light emitted by the light-emitting device irradiates the photocatalytic part to excite the photocatalyst of the photocatalytic part, organic substances remained in the cooking cavity can be decomposed, the peculiar smell in the cooking cavity is removed, the cooking appliance can not leave the peculiar smell after cooking, the smell tainting and the food material pollution are prevented, and a good cooking environment is provided for a user.

According to some embodiments of the invention, the photocatalytic portion comprises a photocatalytic coating coated on an inner wall of the cooking cavity, the photocatalytic coating comprising the photocatalyst.

According to some alternative embodiments of the invention, the photocatalytic coating is hydrophilic.

Optionally, the contact angle of water with the photocatalytic coating is less than 10 °.

According to some optional embodiments of the invention, the cooking appliance comprises: the cooking machine comprises a liner and a door body used for opening and closing the cooking cavity, the liner is arranged in the machine body, the door body is arranged on the machine body, the liner, the door body and the machine body define the cooking cavity therebetween, and at least one of the inner wall of the liner and the inner wall of the door body is coated with a photocatalytic coating.

According to some embodiments of the invention, the photocatalytic portion comprises: a catalytic carrier and a photocatalyst coated on the catalytic carrier.

According to some alternative embodiments of the present invention, the catalytic carrier is a porous structure, and the photocatalyst is coated on a surface of the catalytic carrier.

According to some embodiments of the invention, the light emitting device is disposed opposite to at least a portion of the photocatalytic portion.

According to some alternative embodiments of the invention, the light emitting device is provided on a top wall of the cooking chamber, and at least a portion of the photocatalytic portion is provided on a bottom wall of the cooking chamber.

According to some embodiments of the invention, the photocatalyst comprises at least one of titanium dioxide and zinc oxide.

According to some embodiments of the invention, the cooking appliance comprises: and the circulating fan is arranged in the cooking cavity and is used for driving the airflow in the cooking cavity to flow.

According to some optional embodiments of the invention, the cooking appliance comprises: the steam generator is arranged on the machine body and suitable for conveying steam into the cooking cavity, and a steam outlet communicated with the cooking cavity is formed in the machine body.

Further, the cooking appliance includes: a heating element disposed within the cooking chamber, the heating element adapted to heat the airflow within the cooking chamber.

According to some embodiments of the invention, the cooking appliance comprises: the exhaust fan, be formed with on the organism with the exhaust passage of culinary art chamber intercommunication, exhaust fan establishes in the exhaust passage, be formed with on the organism with the new trend import of culinary art chamber intercommunication and the air outlet with exhaust passage intercommunication, exhaust fan is used for driving the air current follow the new trend import gets into the culinary art chamber and follow the air outlet is discharged.

According to the odor removing method of the cooking appliance in the second aspect of the invention, the cooking appliance comprises a machine body, a light emitting device, a circulating fan, a steam generator and a heating element, the machine body is internally provided with a cooking cavity, a photocatalysis part is arranged in the cooking cavity, the photocatalysis part comprises a photocatalysis coating coated on the inner wall of the cooking cavity, the photocatalysis coating comprises a photocatalyst, the light emitting device and the steam generator are both arranged on the machine body, the circulating fan and the heating element are both arranged in the cooking cavity, the light emitted by the light emitting device is suitable for irradiating the photocatalysis coating to excite the photocatalyst, the circulating fan is used for driving the airflow in the cooking cavity to flow, the heating element is suitable for heating the airflow in the cooking cavity, and the steam generator is suitable for delivering steam into the cooking cavity, the machine body is provided with a steam outlet communicated with the cooking cavity, and the peculiar smell removing method comprises the following steps: the control circuit board of the cooking appliance receives a peculiar smell removing instruction; the control circuit board controls the steam generator to be started, and the steam generator delivers steam into the cooking cavity; the control circuit board controls the light-emitting device and the circulating fan to be started, and peculiar smell in the cooking cavity is removed; turning off the light-emitting device after the light-emitting device runs for a set time, and controlling the heating element to be turned on so as to remove residual water in the cooking cavity; and turning off the heating element and the circulating fan after the heating element runs for a set time.

According to the method for removing the peculiar smell of the cooking appliance, the peculiar smell in the cooking cavity can be automatically removed, residual water in the cooking cavity can be removed, and the effects of removing the peculiar smell in the cooking cavity and preventing long-term humidity and mildew in the cooking cavity can be simultaneously achieved.

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 perspective view of a cooking appliance according to some embodiments of the present invention;

FIG. 2 is a perspective view of a portion of the cooking appliance of FIG. 1;

FIG. 3 is a perspective view of the inner bladder of the cooking appliance of FIG. 1;

FIG. 4 is a perspective view of a door of the cooking appliance of FIG. 1;

FIG. 5 is a partial internal structural view of the cooking appliance of FIG. 1;

FIG. 6 is an enlarged view at A in FIG. 5;

fig. 7 is a schematic position diagram of a circulation fan and a heating element of the cooking appliance of fig. 1;

fig. 8 is a schematic view of a hot air hood of the cooking appliance of fig. 1.

Reference numerals:

a cooking appliance 100;

a machine body 1; a cooking chamber 1 a; an air inlet 1 b; an air outlet 1 c; an exhaust passage 1 d; the first exhaust passage 11 d; the second exhaust passage 12 d; an exhaust chamber 13 d;

a door body 2; a suction passage 2 a; a door frame 21; a door glass 22;

an inner container 3; a mounting port 3 a; a photocatalytic coating 32;

a circulation fan 41; a heating member 42; a hot air hood 43; the intake holes 43 a; an air outlet hole 43 b;

an exhaust fan 5; a steam discharge pipe 6; a steam outlet 6 a; and a control circuit board 7.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A cooking appliance 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 8. The cooking appliance 100 may be an oven, for example, the oven may be an electric heating oven, a microwave oven, or the like, and the cooking appliance 100 may also be a steam box or a steam oven.

As shown in fig. 1, 2, 5 and 7, the cooking appliance 100 according to the embodiment of the first aspect of the present invention includes: a body 1 and a light emitting device.

Specifically, a cooking cavity 1a is defined in the body 1, and food materials can be placed in the cooking cavity 1a for cooking. A photocatalytic portion including a photocatalyst is provided in the cooking chamber 1 a. The light emitting device is arranged on the machine body 1, and light emitted by the light emitting device is suitable for irradiating the photocatalysis part to excite the photocatalyst.

When the light emitting device is operated, light emitted from the light emitting device can irradiate the photocatalytic section, the photocatalyst of the photocatalytic section is excited under the irradiation of the light, and valence band electrons of the excited photocatalyst transition to a conduction band, so that electron and hole pairs are formed on the photocatalyst. Wherein, the electrons have reducibility and can reduce oxides contacting with the electrons; the holes have strong oxidizing property, and can directly oxidize organic matters in contact with the holes or oxidize water or oxygen in contact with the holes into hydroxyl radicals or oxidizing species such as free radicals with strong oxidizing property, and the oxidizing species have strong oxidizing property and can oxidize and decompose the organic matters. For example, organic molecules can be decomposed into carbon dioxide, water, or stable oxides corresponding to elements contained in the organic molecules, thereby removing odors.

Therefore, after the cooking appliance 100 finishes cooking, the odor removing operation can be performed on the cooking cavity 1 a. And starting the light-emitting device to enable the light-emitting device to emit light, wherein the light emitted by the light-emitting device irradiates the photocatalytic part. The photocatalyst of the photocatalytic part is excited under the irradiation of light, and organic matters (such as organic volatile matters) in the cooking cavity 1a can be decomposed, so that peculiar smell in the cooking cavity 1a can be removed, no peculiar smell remains in the cooking appliance 100 after cooking, smell tainting and food material pollution are prevented, and a good cooking environment is provided for a user.

The photocatalytic part of the present invention plays a role of a catalyst, and since it is not consumed, regeneration is not required, and the service life is long. In addition, the photocatalytic section of the present invention does not generate a component that corrodes the inner wall of the cooking cavity 1a and does not generate a component that harms human health. In addition, since the working environment of the cooking cavity 1a of the cooking appliance 100 is a high-temperature high-humidity environment, the photocatalytic section can resist the high-temperature high-humidity environment.

Alternatively, the light emitting device may be an ultraviolet lamp, and the light emitted from the light emitting device is ultraviolet light. At this time, the light emitting device may function as a photocatalyst for activating the photocatalytic portion, and the ultraviolet light itself may also have a sterilizing function for the environment inside the cooking cavity 1 a.

Alternatively, the light emitting device may emit visible light. The type of the light emitting device may be matched according to the characteristics of the photocatalyst.

Alternatively, the photocatalyst may include at least one of titanium dioxide and zinc oxide. Therefore, the photocatalyst has a good photocatalytic effect, and the photocatalyst has high-temperature and high-humidity resistance. For example, the photocatalyst may include titanium dioxide or defective titanium dioxide, the photocatalyst may also include zinc oxide, or the photocatalyst may include both titanium dioxide and zinc oxide. Wherein, both titanium dioxide and zinc oxide can be excited by ultraviolet light.

Alternatively, the photocatalyst may be made into a nano-scale structure, whereby the photocatalytic performance of the photocatalyst may be further improved.

According to the cooking appliance 100 of the embodiment of the invention, the photocatalytic part with the photocatalyst and the light-emitting device suitable for irradiating the photocatalytic part are arranged in the cooking cavity 1a, when the peculiar smell of the cooking cavity 1a of the cooking appliance 100 needs to be removed, the light-emitting device can be turned on, so that the light emitted by the light-emitting device irradiates the photocatalytic part to excite the photocatalyst of the photocatalytic part, organic substances remained in the cooking cavity 1a can be decomposed, the peculiar smell in the cooking cavity 1a can be removed, the peculiar smell of the cooking appliance 100 after cooking can not be remained, the taint of the peculiar smell and the pollution to food materials can be prevented, and a good cooking environment can be provided for a user.

According to some embodiments of the present invention, referring to fig. 2 and 4, the photocatalytic part includes a photocatalytic coating 32 coated on the inner wall of the cooking chamber 1a, the photocatalytic coating 32 may be a titanium oxide coating or a zinc oxide coating, and the photocatalytic coating 32 includes a photocatalyst. For example, the photocatalytic coating 32 may be coated on only a portion of the inner wall of the cooking cavity 1a, or the photocatalytic coating 32 may be coated on the entire inner wall of the cooking cavity 1 a. Therefore, the occupied space of the photocatalytic part can be reduced, the photocatalytic part has a large specific surface area, the photocatalytic effect of the photocatalytic part is further improved, and the effect of removing peculiar smell can be further improved. And, it is also convenient to attach the photocatalyst to the inner wall of the cooking chamber 1 a.

According to some alternative embodiments of the present invention, the photocatalytic coating 32 is hydrophilic. Thereby, the easy cleaning function of the inner surface of the cooking cavity 1a can be simultaneously realized. When the cooking cavity 1a is cooked, part of water or oil or food residues are remained on the inner surface, and the residues on the surface of the cavity can be washed away only by slightly washing with clean water. Since the photocatalytic coating 32 coated on the inner wall of the cooking chamber 1a has hydrophilic property, the water flow can spread on the surface of the photocatalytic coating 32 to a large extent, and when the water flows over the surface of the photocatalytic coating 32, the water can wash away the residue, so that the easy cleaning function of the inner surface of the cooking chamber 1a can be realized.

Alternatively, the photocatalytic coating 32 may be a nanocoating (e.g., a titania nanocoating), which may impart hydrophilic properties to the photocatalytic coating 32.

Alternatively, the contact angle of water with the photocatalytic coating 32 is less than 10 °, whereby water flow can spread to a large extent over the surface of the photocatalytic coating 32, and the residue can be washed off more thoroughly as the water flows over the surface of the photocatalytic coating 32.

According to some alternative embodiments of the present invention, referring to fig. 1 to 4, the cooking appliance 100 includes: the cooking device comprises an inner container 3 and a door body 2 used for opening and closing a cooking cavity 1a, wherein the inner container 3 is arranged in the machine body 1, the door body 2 is arranged on the machine body 1, the cooking cavity 1a is limited among the inner container 3, the door body 2 and the machine body 1, and a photocatalytic coating 32 is coated on at least one of the inner wall of the inner container 3 and the inner wall of the door body 2. For example, the inner wall of the inner container 3 may be coated with the photocatalytic coating 32, the inner wall of the door 2 may be coated with the photocatalytic coating 32, or both the inner wall of the inner container 3 and the inner wall of the door 2 may be coated with the photocatalytic coating 32. Therefore, the photocatalytic coating 32 is coated on the parts of the cooking appliance 100, so that the photocatalytic part and the parts of the cooking appliance 100 are integrated, and the structure and the assembly process of the cooking appliance 100 can be simplified.

For example, referring to fig. 2 and 3, when the photocatalytic coating 32 is coated on the inner wall of the inner container 3, the inner surface of the inner container 3 itself has a coating layer, which may be named as a container coating layer, and the photocatalytic coating 32 may be coated on the surface of the container coating layer, or the material of the container coating layer may be mixed with the material of the photocatalytic coating 32 and then coated on the inner container 3.

For another example, referring to fig. 1 and 4, the door 2 may include a door frame 21 and a door glass 22 disposed in the door frame 21, and the door glass 22 may be transparent or translucent. When the photocatalytic coating 32 is coated on the inner wall of the door body 2, the photocatalytic coating 32 may have a hydrophilic property, for example, the photocatalytic coating 32 may be a nano-coating. Therefore, water can be spread on the surface of the photocatalytic coating 32 to a large extent, so that when steam meets the door body glass 22 with low temperature and is condensed into water drops, the water drops cannot be hung on the surface of the door body glass 22 and spread, and a good visual field in the cooking process is ensured.

According to some embodiments of the invention, the photocatalytic section may include: a catalytic carrier and a photocatalyst coated on the catalytic carrier. Therefore, the photocatalysis part can be modularized, and the mass production of the photocatalysis part is convenient. For example, the catalytic carrier may be a honeycomb ceramic member, a honeycomb ferrochromium-aluminum member, a zeolite member, a foam metal member, etc., the photocatalyst is coated on the surface of the catalytic carrier, and the photocatalyst may be formed in a nano-coating structure. Therefore, the specific surface area of the photocatalytic part can be increased, the photocatalytic effect of the photocatalytic part is further improved, and the effect of removing the odor can be further improved.

According to some embodiments of the present invention, referring to fig. 2 and 3, the light emitting device is disposed opposite to at least a portion of the photocatalytic portion, for example, the light emitting device may be disposed opposite to a portion of the photocatalytic portion, or the light emitting device may be disposed opposite to the entire photocatalytic portion. From this, can guarantee that the light that luminescent device produced shines to the photocatalysis portion on more to make the light intensity of shining of photocatalysis portion, thereby guarantee being aroused the effect of the photocatalyst of photocatalysis portion, thereby can further guarantee to remove the peculiar smell effect.

According to some alternative embodiments of the present invention, referring to fig. 2 and 3, the light emitting device is disposed on the top wall of the cooking cavity 1a, and at least a portion of the photocatalytic portion is disposed on the bottom wall of the cooking cavity 1a, for example, a portion of the photocatalytic portion may be disposed on the bottom wall of the cooking cavity 1a, or the entire photocatalytic portion may be disposed on the bottom wall of the cooking cavity 1 a. From this, can make the light that emitting device sent face the diapire of culinary art chamber 1a to make the photocatalysis portion receive sufficient light intensity, thereby guarantee the excited effect of the photocatalyst of photocatalysis portion, thereby can further guarantee to remove the peculiar smell effect.

For example, in some embodiments of the present invention, referring to fig. 2 and 3, the cooking appliance 100 includes the inner container 3, the light emitting device is disposed on the top wall of the inner container 3, the top wall of the inner container 3 is formed with a mounting opening 3a for mounting the light emitting device, and the photocatalytic portion includes a photocatalytic coating 32 coated on the bottom wall and the left and right inner sidewalls of the inner container 3. Therefore, at the light emitting device, the light emitted by the light emitting device can irradiate the bottom wall and the left and right inner side walls of the inner container 3, so that the part of the inner container 3 coated with the photocatalytic coating 32 can be ensured to receive enough light.

According to some embodiments of the present invention, referring to fig. 5 and 7, the cooking appliance 100 includes: and a circulating fan 41, wherein the circulating fan 41 is arranged in the cooking cavity 1a, and the circulating fan 41 is used for driving the airflow in the cooking cavity 1a to flow. Therefore, the circulation fan 41 can accelerate the air flow in the cooking cavity 1a, so that organic matter molecules in the cooking cavity 1a can be fully and effectively contacted with the photocatalytic part, and the odor removing effect is further improved. Wherein, when the cooking appliance 100 is an electric oven or a steam oven, the circulating fan 41 may be a circulating fan in a hot air component of the cooking appliance. That is, when the cooking appliance 100 is an electric cooking oven, the circulation fan 41 does not need to be additionally provided, and the circulation fan 41 may utilize a circulation fan in a primary hot air assembly of the cooking appliance.

According to some alternative embodiments of the present invention, referring to fig. 5 and 6, the cooking appliance 100 includes: steam generator, steam generator establish on organism 1, steam generator is suitable for to the interior steam of carrying of culinary art chamber 1a, and steam generator can set up the outside at culinary art chamber 1a, and steam generator can be through conveyer pipe and culinary art chamber 1a intercommunication, is equipped with the steam outlet 6a with culinary art chamber 1a intercommunication on the organism 1, and when the internal pressure of culinary art chamber 1a is great, the steam in the culinary art chamber 1a can be discharged to the external environment through steam outlet 6 a. Thus, by the provided steam generator, the cooking appliance 100 can have a function of steaming food, i.e., steam is delivered into the cooking cavity 1a through the steam generator to cook food. And, when the photocatalytic portion includes the photocatalytic coating 32 coated on the inner wall of the cooking cavity 1a, when removing the odor from the cooking cavity 1a of the cooking appliance 100, before the light emitting device is turned on, the steam generator may be turned on, so that the steam generator delivers steam into the cooking cavity 1a, the steam mist wets and cleans the inner wall of the cooking cavity 1a, and the solid residue and grease and the like remaining on the inner wall of the cooking cavity 1a are cleaned, thereby reducing the influence of the photocatalytic effect on the photocatalytic coating 32 coated on the inner wall of the cooking cavity 1a due to the shielding of the solid residue and grease and the like.

Further, referring to fig. 7, the cooking appliance 100 includes: a heating member 42, the heating member 42 being disposed in the cooking chamber 1a, the heating member 42 being adapted to heat the air flow in the cooking chamber 1a, the heating member 42 being a heating pipe. From this, through the heating member 42 that sets up, can play the stoving effect to in the culinary art chamber 1a, can remove the inside residual water of culinary art chamber 1a, reduce the relative humidity of culinary art chamber 1a, can realize getting rid of the peculiar smell simultaneously and prevent the effect that the long-term humidity of culinary art chamber 1a mildenes and rot. In addition, the circulation fan 41 can accelerate the flow of hot air in the cooking cavity 1a, thereby improving the drying efficiency, and the water remaining in the cooking cavity 1a can be discharged from the steam outlet 6a after being heated and evaporated into steam.

According to some embodiments of the present invention, referring to fig. 5, the cooking appliance 100 includes: exhaust fan 5, be formed with the exhaust passage 1d with culinary art chamber 1a intercommunication on the organism 1, exhaust fan 5 establishes in exhaust passage 1d, is formed with the new trend import with culinary art chamber 1a intercommunication and the air outlet 1c with exhaust passage 1d intercommunication on the organism 1, and exhaust fan 5 is used for driving the air current to get into culinary art chamber 1a and follow air outlet 1c and discharge from the new trend import. Therefore, the external fresh air can be introduced into the cooking cavity 1a through the arranged exhaust fan 5 and the fresh air inlet. When cooking electrical apparatus 100 removes the peculiar smell operation, shine the photocatalysis portion through luminescent device in order to decompose the organic matter in the culinary art chamber 1a, fresh air through the new trend import entering culinary art chamber 1a, can further improve the air quality in the culinary art chamber 1a, can accelerate the gas flow in the culinary art chamber 1a simultaneously, make and get into fresh air in the culinary art chamber 1a, make comparatively dirty air in the culinary art chamber 1a discharge to the external environment through exhaust passage 1d and air outlet 1c simultaneously, further improve the peculiar smell effect of removing in the culinary art chamber 1 a.

For example, in the example of fig. 2, 5 to 8, the cooking appliance 100 includes the above-described inner container 3, the door body 2, the circulation fan 41, the heating member 42, and the steam generator. Further, the cooking appliance 100 includes a hot air hood 43 and an exhaust fan 5, the hot air hood 43 is disposed at the rear of the cooking cavity 1a and a hot air cavity is defined between the hot air hood 43 and the rear sidewall of the cooking cavity 1a, the circulating fan 41 and the heating member 42 are both located in the hot air cavity, and the heating member 42 is disposed at the outer peripheral side of the circulating fan 41. An air inlet hole 43a and an air outlet hole 43b are formed on the hot air cover 43, the air inlet hole 43a is located in the middle of the hot air cover 43, and the number of the air inlet holes 43a is multiple. The air outlet holes 43b are positioned on the outer peripheral side of the air inlet holes 43a, and the air outlet holes 43b are plural.

An exhaust passage 1d communicated with the cooking cavity 1a is formed at the upper part of the machine body 1, an exhaust head passage is positioned above the cooking cavity 1a, and an exhaust fan 5 is arranged in the exhaust passage 1 d. The exhaust passage 1d includes a first exhaust passage 11d, a second exhaust passage 12d and an exhaust chamber 13d communicating the first exhaust passage 11d and the second exhaust passage 12d, the first exhaust passage 11d and the second exhaust passage 12d are arranged at an interval from top to bottom, the second exhaust passage 12d is located above the first exhaust passage 11d, and the exhaust fan 5 is arranged in the exhaust chamber 13 d. The door body 2 is internally provided with an air suction channel 2a, an air inlet 1b is defined between the lower side of the door body 2 and the machine body 1, an air outlet 1c is defined between the upper side of the door body 2 and the machine body 1, the air inlet 1b is communicated with the air suction channel 2a, the air outlet 1c is communicated with a second exhaust channel 12d, and the air suction channel 2a is communicated with a first exhaust channel 11 d. The control circuit board 7 of the cooking appliance 100 is located on the upper side of the second exhaust passage 12d, and a part of the top wall of the second exhaust passage 12d constitutes a heat dissipation plate for dissipating heat from the control circuit board 7. A steam discharge pipe 6 is arranged between the cooking cavity 1a and the second exhaust channel 12d, two ends of the steam discharge pipe 6 are respectively connected with the top wall of the cooking cavity 1a and the side wall of the second exhaust channel 12d, and at least one steam outlet 6a is formed at the part of the steam discharge pipe 6 positioned at the second exhaust channel 12 d.

Therefore, when the cooking appliance 100 performs cooking, if food needs to be steamed, the steam generator can be started; if the food is baked, the heating element 42 and the circulating fan 41 can be started, the circulating fan 41 drives the air flow in the cooking cavity 1a to exchange heat with the heating element 42, so that the temperature in the cooking cavity 1a is increased, the circulating fan 41 can drive the air flow to enter the hot air cavity from the air inlet hole 43a on the hot air cover 43, the temperature is increased after the air flow exchanges heat with the heating element 42, and the air flow flows into other parts of the cooking cavity 1a from the air outlet hole 43b on the hot air cover 43, so that the food placed in the cooking cavity 1a can be baked.

Furthermore, when the cooking appliance 100 performs a cooking operation, due to the pressure increase in the cooking cavity 1a, the air flow in the cooking cavity 1a, such as steam, can flow into the second exhaust channel 12d through the steam discharge pipe 6 and the steam outlet 6a on the steam discharge pipe 6, and finally is discharged to the external environment from the air outlet 1 c. Meanwhile, the external air can enter the air suction channel 2a from the air inlet 1b, then sequentially flows through the first exhaust channel 11d, the exhaust cavity 13d and the second exhaust channel 12d, and is finally exhausted to the external environment through the air outlet 1c, and due to the fact that the temperature of the external air is relatively low, when the introduced external air flows through the second exhaust channel 12d, the heat generated by the control circuit board 7 of the cooking appliance 100 can be taken away, and the heat dissipation effect is achieved on the control circuit board 7.

When the odor removing operation is required after the cooking appliance 100 finishes cooking food, the light emitting device and the circulating fan 41 may be turned on, so that the light emitting device emits light, and the light emitted from the light emitting device irradiates the photocatalytic portion. The photocatalyst of the photocatalytic portion is excited by the light irradiation, and organic matters (for example, organic volatile matters) in the cooking cavity 1a can be decomposed, so that the odor in the cooking cavity 1a can be removed. Meanwhile, the circulating fan 41 can drive the gas in the cooking cavity 1a to flow, and accelerate the gas flow in the cooking cavity 1a, so that organic molecules in the cooking cavity 1a can be fully and effectively contacted with the photocatalytic part, and the odor removing effect is further improved. After the light emitting device is turned off after the set time of operation, the heating element 42 is turned on, the circulating fan 41 still operates at this time, the cooking cavity 1a can be dried, the moisture remaining in the cooking cavity 1a is heated and evaporated into steam, and then the steam can be discharged from the steam discharge pipe 6 and the steam outlet 6a to the second exhaust passage 12d, and finally discharged to the outside through the air outlet 1 c.

Further, in this embodiment, the main body 1 may be formed with a fresh air inlet communicating with the cooking cavity 1a, and a top wall of the cooking cavity 1a may be formed with a vent communicating the cooking cavity 1a and the first exhaust passage 11 d. When cooking electrical apparatus 100 removes the peculiar smell operation, shine the photocatalysis portion through luminescent device in order to decompose the organic matter in the culinary art chamber 1a, fresh air through the new trend import entering culinary art chamber 1a, can further improve the air quality in the culinary art chamber 1a, can accelerate the gas flow in the culinary art chamber 1a simultaneously, make and get into fresh air in the culinary art chamber 1a, make comparatively dirty air in the culinary art chamber 1a simultaneously pass through the vent, exhaust passage 1d and air outlet 1c discharge to external environment, further improve the peculiar smell effect of removing in the culinary art chamber 1 a.

Referring to fig. 1 to 8, in accordance with the odor removing method of the cooking appliance 100 according to the second aspect of the present invention, the cooking appliance 100 includes a body 1, a light emitting device, a circulating fan 41, a steam generator and a heating element 42, the body 1 has a cooking cavity 1a therein, the cooking cavity 1a has a photocatalytic portion therein, the photocatalytic portion includes a photocatalytic coating 32 coated on an inner wall of the cooking cavity 1a, the photocatalytic coating 32 includes a photocatalyst, the light emitting device and the steam generator are both disposed on the body 1, the circulating fan 41 and the heating element 42 are both disposed in the cooking cavity 1a, the light emitted from the light emitting device is adapted to irradiate the photocatalytic coating 32 to activate the photocatalyst, the circulating fan 41 is adapted to drive a flow of an air in the cooking cavity 1a, the heating element 42 is adapted to heat the air in the cooking cavity 1a, the steam generator is adapted to deliver steam into the cooking cavity 1a, the body 1 is provided with a steam outlet 6a communicating with the cooking cavity, the method for removing the peculiar smell comprises the following steps:

the control circuit board 7 of the cooking appliance 100 receives the odor removing instruction, for example, the odor removing button can be pressed, so that the control circuit board 7 can receive the odor removing instruction;

the control circuit board 7 controls the steam generator to be started, the steam generator conveys steam into the cooking cavity 1a, the steam mist wets and cleans the inner wall of the cooking cavity 1a, solid residues and grease and the like remained on the inner wall of the cooking cavity 1a are cleaned, and the influence of the solid residues, the grease and the like on the photocatalytic coating 32 coated on the inner wall of the cooking cavity 1a on the photocatalytic effect is reduced;

the control circuit board 7 controls the light emitting device and the circulation fan 41 to be turned on, so that the light emitting device emits light, and light emitted from the light emitting device is irradiated onto the photocatalytic portion. The photocatalyst of the photocatalytic part is excited under the irradiation of light, organic matters (such as organic volatile matters) in the cooking cavity 1a can be decomposed, so that peculiar smell in the cooking cavity 1a is removed, meanwhile, the circulating fan 41 can drive gas in the cooking cavity 1a to flow, the gas flow in the cooking cavity 1a can be accelerated, organic matter molecules in the cooking cavity 1a can be fully and effectively contacted with the photocatalytic part, and the peculiar smell removal effect is further improved;

after the light emitting device is operated for a set time, the light emitting device is turned off, the heating element 42 is controlled to be turned on, and the circulating fan 41 is still operated to remove residual water in the cooking cavity 1a, so that the cooking cavity 1a can be dried, and the water remained in the cooking cavity 1a can be discharged to the outside from the steam outlet 6a after being heated and evaporated into steam;

after the heating member 42 is operated for a set time, the heating member 42 and the circulation fan 41 are turned off, and the deodorization operation is completed.

According to the method for removing the odor of the cooking appliance 100, the odor in the cooking cavity 1a can be automatically removed, the residual water in the cooking cavity 1a can be removed, and the effects of removing the odor in the cooking cavity 1a and preventing long-term humidity and mildew in the cooking cavity 1a can be simultaneously achieved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric cooking appliance, characterized in that it comprises:

the cooking device comprises a machine body, a cooking cavity and a light source, wherein a photocatalysis part is arranged in the cooking cavity and comprises a photocatalyst;

the light-emitting device is arranged on the machine body, and light emitted by the light-emitting device is suitable for irradiating the photocatalytic part to excite the photocatalyst;

the exhaust fan, be formed with on the organism with the exhaust passage of culinary art chamber intercommunication, exhaust fan establishes in the exhaust passage, be formed with on the organism with the new trend import of culinary art chamber intercommunication and the air outlet with the exhaust passage intercommunication, the new trend import is used for introducing outside fresh air to in the culinary art intracavity, exhaust fan is used for driving the air current follow the new trend import gets into the culinary art chamber and follow the air outlet is discharged to external environment.

2. The cooking appliance according to claim 1, wherein the photocatalytic portion comprises a photocatalytic coating coated on an inner wall of the cooking cavity, the photocatalytic coating comprising the photocatalyst.

3. The cooking appliance according to claim 2, wherein the photocatalytic coating has a hydrophilic nature.

4. Cooking appliance according to claim 3, characterized in that the contact angle of water with the photocatalytic coating is less than 10 °.

5. The cooking appliance according to claim 2, characterized in that it comprises: the cooking machine comprises a liner and a door body used for opening and closing the cooking cavity, the liner is arranged in the machine body, the door body is arranged on the machine body, the liner, the door body and the machine body define the cooking cavity therebetween, and at least one of the inner wall of the liner and the inner wall of the door body is coated with a photocatalytic coating.

6. The cooking appliance according to claim 1, wherein the photocatalytic portion comprises: a catalytic carrier and a photocatalyst coated on the catalytic carrier.

7. The cooking appliance according to claim 6, wherein the catalytic carrier is a porous structure and the photocatalyst is coated on the surface of the catalytic carrier.

8. The cooking appliance according to claim 1, wherein the light emitting device is disposed opposite to at least a portion of the photocatalytic portion.

9. The cooking appliance according to claim 8, wherein the light emitting device is provided on a top wall of the cooking cavity and at least a portion of the photocatalytic portion is provided on a bottom wall of the cooking cavity.

10. The cooking appliance of claim 1 wherein the photocatalyst comprises at least one of titanium dioxide and zinc oxide.

11. The cooking appliance according to any of the claims 1 to 10, comprising: and the circulating fan is arranged in the cooking cavity and is used for driving the airflow in the cooking cavity to flow.

12. The cooking appliance according to claim 11, characterized in that it comprises: the steam generator is arranged on the machine body and suitable for conveying steam into the cooking cavity, and a steam outlet communicated with the cooking cavity is formed in the machine body.

13. The cooking appliance according to claim 12, characterized in that it comprises: a heating element disposed within the cooking chamber, the heating element adapted to heat the airflow within the cooking chamber.

14. The peculiar smell removing method of the cooking appliance is characterized in that the cooking appliance comprises a machine body, a light emitting device, a circulating fan, a steam generator and a heating element, a cooking cavity is arranged in the machine body, a photocatalysis part is arranged in the cooking cavity and comprises a photocatalysis coating coated on the inner wall of the cooking cavity, the photocatalysis coating comprises a photocatalyst, the light emitting device and the steam generator are both arranged on the machine body, the circulating fan and the heating element are both arranged in the cooking cavity, light emitted by the light emitting device is suitable for irradiating the photocatalysis coating to excite the photocatalyst, the circulating fan is used for driving airflow in the cooking cavity to flow, the heating element is suitable for heating the airflow in the cooking cavity, the steam generator is suitable for conveying steam into the cooking cavity, and a steam outlet communicated with the cooking cavity is arranged on the machine body, the method for removing the peculiar smell comprises the following steps:

the control circuit board of the cooking appliance receives a peculiar smell removing instruction;

the control circuit board controls the steam generator to be started, and the steam generator delivers steam into the cooking cavity;

the control circuit board controls the light-emitting device and the circulating fan to be started, and peculiar smell in the cooking cavity is removed;

turning off the light-emitting device after the light-emitting device runs for a set time, and controlling the heating element to be turned on so as to remove residual water in the cooking cavity;

and turning off the heating element and the circulating fan after the heating element runs for a set time.