Patent Application
20210315410
This application claims priority to Chinese Patent Application No. 202010273803.X, filed on Apr. 9, 2020.
The disclosure relates to a grinding device, more particularly to a grinding device used in a coffee maker.
Generally, a time duration that a coffee grinder grinds coffee beans is preset manually. However, the coffee beans may not be fully ground into powders or may be ground too finely. In a case that the coffee beans are not fully ground, the taste of coffee brewed from overly coarse coffee ground is weak. On the other hand, in a case that the coffee beans are ground too finely, a motor of the coffee grinder may be overheated and damaged, and the taste of coffee brewed from such coffee grinder is bitter.
Therefore, an object of the disclosure is to provide grinding device capable of alleviating the drawbacks of the conventional coffee grinder.
According to an aspect of the disclosure, a grinding device includes a housing unit, a filtering unit, a grinding unit and a sensing unit. The housing unit includes a housing body and a cover. The housing body defines a receiving space therein and has an opening in spatial communication with the receiving space and ambient surroundings. The cover is mounted on a top of the housing body to cover the opening. The filtering unit is mounted in the receiving space and includes a strainer. The strainer defines a grinding space therein and is formed with a plurality of through holes in spatial communication with the receiving space and the grinding space. The grinding unit is mounted to the housing unit, and includes a blade element and a driving element. The blade element is rotatably mounted in the grinding space and is adapted for grinding objects disposed in the grinding space. The driving element is connected to the blade element and is operable to drive rotation of the blade element. The sensing unit is mounted to the housing unit, is adapted for sensing presence of the objects in the grinding space, and is electrically connected to the driving element to output a control signal to the driving element to stop rotation of the blade element when sensing that the objects in the grinding space are ground fully into powder so that none of the objects is sensed in the grinding space.
According to another aspect of the disclosure, a coffee maker includes a bottle unit and a grinding device. The bottle unit includes a bottle body and a lid. The bottle body defines an inner space. The lid is pivotally mounted to the bottle body. The grinding device is mounted in the inner space, and includes a housing unit, a filtering unit, a grinding unit and a sensing unit. The housing unit includes a housing body and a cover. The housing body defines a receiving space therein and has an opening in spatial communication with the receiving space and the inner space. The cover is mounted above the housing body to cover the opening. The filtering unit is mounted in the receiving space and includes a strainer. The strainer defines a grinding space therein and is formed with a plurality of through holes in spatial communication with the receiving space and the grinding space. The grinding unit is mounted to the housing unit, and includes a blade element and a driving element. The blade element is rotatably mounted in the grinding space and is adapted for grinding objects disposed in the grinding space. The driving element is connected to the blade element and is operable to drive rotation of the blade element. The sensing unit is mounted to the housing unit, is adapted for sensing presence of the objects in the grinding space, and is electrically connected to the driving element to output a control signal to the driving element to stop rotation of the blade element when sensing that the objects in the grinding space are ground fully into powder so that none of the objects are sensed in the grinding space.
According to still another aspect of the disclosure, a method for controlling operation of a grinding device is to be implemented by a grinding device. The grinding device includes a housing unit, a filtering unit, a grinding unit, and a sensing unit. The housing unit defines a receiving space therein. The filtering unit is mounted in the receiving space and includes a strainer defining a grinding space therein. The grinding unit includes a blade element disposed in the grinding space and a driving element connected to the blade element to drive the blade element to rotate. The sensing unit is mounted to the housing unit. The method includes steps of:
driving rotation of the blade element by the driving element;
sensing presence of the objects in the grinding space by the sensing unit; and
outputting a control signal, by the sensing unit, to the driving element to stop rotation of the blade element when the sensing unit detects that the objects in the grinding space are ground fully into powder so that none of the objects is sensed in the grinding space.
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:
Referring to
The housing unit 1 includes a housing body 11 and a cover 12. The housing body 11 defines a receiving space 111 therein and has an opening 112 in spatial communication with the receiving space 111 and ambient surroundings. The cover 12 is mounted on a top of the housing body 11 to cover the opening 112.
The filtering unit 3 is mounted in the receiving space 111 and includes a strainer 31. The strainer 31 is a cylindrical surrounding wall, defines a grinding space 310 therein, and is formed with a plurality of through holes 311 in spatial communication with the receiving space 111 and the grinding space 310. The housing body 11 cooperates with the strainer 31 to define a brewing space 114 therebetween.
The grinding unit 2 is mounted to the housing unit 1, and includes a blade element 21 and a driving element 22. The blade element 21 is rotatably mounted in the grinding space 310 and is adapted for grinding objects (i.e., coffee beans) disposed in the grinding space 310 into powder. The driving element 22 is connected to the blade element 21, is operable to drive rotation of the blade element 21, and is a motor, for example. The blade element 21 is configured to generate an air flow in the grinding space 310 when rotating to move the powder from the grinding space 310 into the brewing space 114 via the through holes 311 due to centrifugal force. The brewing space 114 is adapted for storing the powder and has a bottom end located farther from the cover 12 than a bottom end of the grinding space 310 in an up-down direction.
The sensing unit 4 is mounted to the housing unit 1, is adapted for sensing presence of the objects in the grinding space 310, and is electrically connected to the driving element 22 to output a control signal to the driving element 22 to stop rotation of the blade element 21 when sensing that the objects in the grinding space 310 are ground fully into powder and are moved into the brewing space 114 due to centrifugal force so that none of the objects is sensed in the grinding space 310.
The sensing unit 4 includes a light emitting element 41, a reflecting element 42, and a receiving element 43. The light emitting element 41 is for outputting a light signal. The reflecting element 42 is mounted to the housing body 11 for reflecting the light signal outputted by the light emitting element 41. The receiving element 43 is for receiving the light signal reflected by the reflecting element 42 to output the control signal to the driving element 22. In this embodiment, the light emitting element 41 is mounted on the cover 12 and emits light through the grinding space 310, and the receiving element 43 is mounted to the strainer 31 and disposed under the blade element 21.
The filtering unit 3 further includes a bottom plate 30 disposed under and connected to the strainer 31 to define the bottom end of the grinding space 310. The bottom plate 30 is made of a light transmissive material to permit the receiving element 43 to receive the light signal reflected by the reflecting element 42.
Note that the configuration of the sensing unit 4 is not limited to the example described herein, for example, the positions where the light emitting element 41, the reflecting element 42 and the receiving element 43 are mounted are interchangeable. In other embodiments of the present disclosure, the reflecting element 42 and the receiving element 43 may be omitted and the light emitting element 41 is capable of receiving the light signal emitted thereby and reflected by the blade element 21 in the strainer 31 to output the control signal. Further, in other embodiments, the sensing unit 4 may be a weight sensor such as a load cell mounted under the strainer 31 for sensing presence of the objects in the grinding space 310. A photo-switch, a capacitor switch, a resistance switch and any other sensors and switches capable of sensing presence of objects disposed in the grinding space 310 may be utilized as the sensing unit 4, and the implementation of the sensing unit 4 is not limited to the examples described herein.
The housing unit 1 further includes a lower filtering wall 115 that is disposed in the brewing space 114 and that is located farther from the cover 12 than the bottom plate 30 in the up-down direction such that the powder is accumulated in the brewing space 114.
Referring to
Further referring to
In step S1, the blade element 21 of the grinding unit 2 is driven by the driving element 22 to rotate so as to grind the coffee beans disposed in the grinding space 310. The blade element 21 generates an air flow in the grinding space 310 when rotating to move the powder from the grinding space 310 into the brewing space 114 via the through holes 311 due to centrifugal force. By virtue of the structure of the lower filtering wall 115 that is disposed in the brewing space 114 and that is located lower than the bottom plate 30 of the filtering unit 3 in the up-down direction, the powder would not be left in the grinding space 30. Thus, the powder is wholly moved into the brewing space 114 and is accumulated on the lower filtering wall 115.
Step S2 is to sense presence of the objects in the grinding space 310 and is performed while step S1 is performing. In step S2, the sensing unit 4 repeatedly outputs a light signal by the light emitting element 41 and determines that none of the objects is in the grinding space 310 when the light signal is received by the receiving element 43. When the determination made in step S2 is positive (i.e., there are still some coffee beans in the grinding space 310), the flow of the method goes back to step S1; otherwise, the coffee beans in the grinding space 310 are ground fully into powder and are moved into the brewing space 114 so that none of the objects is sensed in the grinding space 310, and the flow of the method goes to step S3.
In step S3, the receiving element 43 of the sensing unit 4 outputs a control signal to the driving element 22 to stop rotation of the blade element 21. In this way, the coffee beans disposed in the grinding space 310 can be ground fully into powder without being ground too fine or overly coarse.
Referring back to
In this embodiment, the cover 12 is mounted in the lid 52 and is formed with a plurality of through bores 121 adapted for permitting hot water to be sprinkled into the receiving space 111 and then flowing into the brewing space 114 to mix with the powder so as to brew coffee.
The lower filtering wall 115 of the housing unit 1 is located at a lower end portion in the receiving space 111, cooperates with the housing body 11 to define a collecting channel 116 in the receiving space 111 and under the lower filtering wall 115, and is adapted for filtering the coffee so that the coffee flows into the collecting channel 116.
The collecting channel 116 is in spatial communication with the outlet 513 so as to guide the coffee filtered by the lower filtering wall 115 to discharge out of the outlet 513. Specifically, in this embodiment, the housing unit 1 further includes a filtering side plate 117. The filtering side plate 117 is disposed in the receiving space 111, cooperates with the housing body 11 to define a collecting compartment 118, and is formed with a plurality of perforations 10. The collecting compartment 118 is spaced apart from the grinding device 6 and is in spatial communication with the outlet 513. The perforations 10 are in spatial communication with the collecting compartment 118 and the collecting channel 116. The filtering side plate 117 is adapted for filtering the coffee that flows from the receiving space 111 into the collecting compartment 118 via the perforations 10 to discharge the coffee out of the outlet 513.
To sum up, by virtue of the sensing unit 4 that senses presence of the objects in the grinding space 310 and the structures of grinding unit 2 and the filtering unit 3 of the present disclosure, the objects disposed in the grinding space 310 can be fully ground into powder without being ground too fine or overly coarse. In this way, the driving element 22 of the grinding device 6 would not be overheated, and the taste of the beverage brewed from the powder ground by the grinding device 6 is relatively good.
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 is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment 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 |
|---|---|---|---|
| 202010273803.X | Apr 2020 | CN | national |
