This application claims priority to Taiwanese Patent Application No. 108137001, filed on Oct. 15, 2019.
The disclosure relates to a heating apparatus, and more particularly to a compound heating apparatus.
It is known to provide a food heating apparatus that has microwave and infrared sources. To avoid the microwave radiation of the microwave source from interfering with or impairing the infrared source, and to collect and distribute heat radiant energy into the heating chamber, a light shield is disposed around the infrared source, and a microwave blocker plate covers an opening of the light shield facing toward the heating chamber. The heat radiant energy generated by the infrared source is collected in an infrared radiation chamber defined by the light shield and the microwave blocker plate, and allowed to pass through holes of the microwave blocker plate into the heating chamber. Meanwhile, the microwave blocker plate can block microwaves from entering the infrared radiation chamber and prevent the microwaves from interfering with or impairing the infrared source.
However, the infrared source has a glass tube (e.g., a quartz or halogen heating tube) to generate high heat radiant energy in a short time. Therefore, the infrared radiant chamber defined by the light shield and the microwave blocker plate can reach an excessively high temperature. In addition, because the microwave blocker plate can block a large amount of the heat radiant energy generated in the infrared radiant chamber, not only is the heat radiation transfer inefficient, but the light shield and the microwave blocker plate are easily deformed and the glass tube can become brittle.
Therefore, an object of the disclosure is to provide a compound heating apparatus that can alleviate at least one of the drawbacks of the prior art.
According to the disclosure, a compound heating apparatus includes a casing, a microwave generating unit, and an infrared heating unit.
The casing has a heating chamber.
The microwave generating unit is disposed in the casing outwardly of the heating chamber to provide microwaves to the heating chamber.
The infrared heating unit includes at least one infrared radiation generator, at least one light shield, at least one microwave blocker plate, at least one infrared radiation chamber, and an air supply module.
The at least one infrared radiation generator is disposed in the casing outwardly of the heating chamber to generate infrared heat radiation to the heating chamber.
The at least one light shield is disposed around the at least one infrared radiation generator, and has a shield opening facing toward the heating chamber.
The least one microwave blocker plate has a plurality of microwave blocking holes.
The at least one infrared radiation chamber is defined by the at least one microwave blocker plate and the at least one light shield, and encloses the at least one infrared radiation generator.
The air supply module is connected to the at least one light shield to blow air to the at least one light shield for causing heat radiant energy generated from the at least one infrared radiation generator to pass acceleratedly by forced heat convection through the microwave blocking holes to the heating chamber.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
The casing 1 has a heating chamber 10, a top space 12 above the heating chamber 10, and a partition structure 11 separating the heating chamber 10 from the top space 12 of the casing 1. The partition structure 11 has two partition openings 110 communicating with the heating chamber 10 and the top space 12 of the casing 1.
The microwave generating unit 2 is disposed in the casing 1 outwardly of the heating chamber 10. In this embodiment, the microwave generating unit 2 includes two microwave generators 21. One of the microwave generators 21 is disposed in the top space 12 of the casing 1. Another microwave generator 21 is disposed below the heating chamber 10. The microwave generators 21 provide microwaves to the heating chamber 10.
Referring to
The infrared radiation generators 31 are disposed in the top space 12 of the casing 1. Specifically, the infrared radiation generators 31 are respectively situated above the partition openings 110 and are disposed at two opposite sides of the microwave generator 21 in the top space 12 of the casing 1 to generate infrared heat radiation to the heating chamber 10. In this embodiment, each infrared radiation generator 31 is, but not limited to, a tubular infrared lamp. In other embodiments, each infrared radiation generator 21 can be a quartz lamp, an incandescent lamp, a nickel lamp, or an inert gas (e.g., nitrogen, argon or mixtures thereof) lamp.
The light shields 32 are respectively disposed around the infrared radiation generators 31 within the top space 12 of the casing 1. Each light shield 32 is in an elongate form with an inverted-U cross section. In this embodiment, each light shield 32 has a shield opening 321 and a vent opening 322. The shield opening 321 is aligned with one of the partition openings 110 and faces toward the heating chamber 10. The vent opening 322 is distal from or opposite to the shield opening 321.
Referring to
To avoid deformation and structural disintegration caused by the heat radiant energies generated from the infrared radiation generators 31, the light shields 32 and the microwave blocker plates 33 are made of metal. Each of the light shields 32 and the microwave blocker plates 33 has a thickness ranging from 2 mm to 4 mm. The hole dimension of each microwave blocking hole 331 of each microwave blocker plate 33 is smaller than 3 mm. As such, the heat radiant energy inside the infrared radiation chambers 35 can pass through the microwave blocking holes 331, and the microwave blocker plates 33 can prevent the microwaves produced by the microwave generators 21 from entering into the light shields 32 to interfere with or damage the infrared radiation generators 31.
The air supply module 34 is connected to the light shields 32 to blow air to the light shields 32 for causing the heat radiant energy generated from the infrared radiation generators 31 to pass acceleratedly by forced heat convection through the microwave blocking holes 331 of the microwave blocker plates 33 to the heating chamber 10. As shown in
In order to further increase the heat radiation efficiency, each microwave blocker plate 33 has a surface that faces the heating chamber 10 and that is coated with a heat radiating coating, e.g., a high efficiency radiation coating B-600, to radiate heat absorbed by the respective microwave blocker plate 33. Thus, the heat radiant energy of the infrared radiation generators 31 passing through the microwave blocking holes 331 are acceleratedly distributed into the heating chamber 10.
Referring back to
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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108137001 | Oct 2019 | TW | national |