reference will now be made to embodiments of the invention , one or more examples of which are illustrated in the figures . the embodiments are provided by way of explanation of the invention , and are not meant as a limitation of the invention . for example , features illustrated or described as part of one embodiment may be used with another embodiment to yield still a further embodiment . it is intended that the invention encompass these and other modifications and variations as come within the scope and spirit of the invention . fig1 is a flowchart of a method for making coffee beverage according to one embodiment of the present disclosure . fig4 illustrates a coffee machine 400 that may be configured to perform the method illustrated in fig1 . at block 102 , a warming up unit 402 of coffee machine 400 may be attached to a container of the coffee machine 400 , and may be configured to warm up coffee beans in the container . at block 104 , grinding unit 404 may be configured to grind the warmed up coffee beans into coffee grounds . at block 106 , brewing unit 406 may be configured to brew the coffee grounds into coffee beverage . in one embodiment , the coffee beans warmed up at block 102 may be beans of a pre - determined roasting level and said warming up operation performed by warming up unit 402 may not change the pre - determined roasting level of the coffee beans . therefore , in one embodiment , a warm - up temperature of the coffee beans achieved by warming up unit 402 may be no higher than 190 degrees celsius to avoid strong maillard reaction that may change the roasting level of the beans . in another embodiment , the coffee beans contained in the chamber may be half - roasted beans and warming up unit 402 may be configured to increase the warm - up temperature to achieve the pre - determined roasting level . in another embodiment , coffee machine 400 may further comprise a determining unit 408 configured to determine the warm - up temperature based on a desired flavor of the coffee beverage . for example , if the desired flavor is stronger , the warm - up temperature may be higher . in one embodiment , warm - up time of the coffee beans may be determined by the warm - up temperature , desired flavor of coffee beverage as well as many other factors including initial temperature of the beans , weight of the beans , or type of the coffee beans etc . for example , for beans from room temperature and beans from the refrigerator , the warm - up time may be different . also , greater amount of beans may require longer warm up time to reach a pre - determined warm - up temperature . table 1 ( a ) provides flavor comparison between columbia sp coffee beans with and without being warmed up prior to brewing , wherein two groups of the coffee beans having different initial temperatures are used as examples . according to table 1 ( a ), the flavor of coffee beverage made from warmed up coffee beans may be rich and obvious and taste better than coffee beverage made from beans taken out of a refrigerator or even beans at room temperature . similar results may be obtained for brazil french coffee beans as illustrated in table 1 ( b ). fig5 illustrates another coffee machine 500 in accordance to one embodiment of the present disclosure . coffee machine 500 may comprise a sub - container in addition to a main container , configured to hold coffee beans enough to make one or two cups of coffee , for example 10 to 20 grams of coffee beans . coffee machine 500 may further comprise a sub warming up unit 503 attached to the sub - container , which may or may not be part of warming up unit 502 attached to the main container , configured to warm up the coffee beans contained in the sub - container . in one embodiment , at block 102 warming up unit 502 may be configured to warm up the coffee beans in the main container to , for example 60 ° c ., and warming up unit 503 may be configured to warm up coffee beans in the sub - container to , for example 80 ° c ., based on instructions from determining unit 508 . at block 104 , grinding unit 504 may be configured to grind the coffee beans warmed up by warming up unit 503 . at block 106 , brewing unit 506 may be configured to brew coffee grounds from grinding unit 504 to make one or two cups of coffee beverage . fig2 illustrates a flowchart of another method for making coffee beverage in accordance with one embodiment of the present disclosure . fig6 illustrates a coffee machine 600 which may be configured to perform the method illustrated in fig2 . in one embodiment , coffee machine 600 may comprise a warming up unit 602 attached to grinding unit 604 . at block 202 , grinding unit 604 may be configured to grind coffee beans into coffee grounds . at block 204 , warming up unit 602 may be configured to warm up a mixture of coffee beans and coffee grounds contained in grinding unit 604 . at block 206 , brewing unit 606 may be configured to brew coffee grounds into coffee beverage . in one embodiment , coffee machine 600 may further comprise a determining unit 608 configured to determine a warm - up temperature of the mixture of coffee beans and coffee grounds in grinding unit 604 warmed up by warming up unit 602 . fig3 illustrates a flowchart of yet another method for making coffee beverage in accordance with one embodiment of the present disclosure . fig7 illustrates a coffee machine 700 which may be configured to perform the method illustrated in fig3 . in one embodiment , coffee machine 700 may comprise a container configured to hold coffee grounds . coffee machine 700 may further comprise a warming up unit 702 attached to the container . at block 302 , coffee grounds may be obtained first . in one embodiment , coffee machine 700 may optionally comprise a grinding unit 704 configured to grind coffee beans into coffee grounds . in another embodiment , coffee grounds may be in commercially available format . at block 304 , warming up unit 702 may be configured to warm up the coffee grounds . at block 306 , brewing unit 706 may be configured to brew the warmed up coffee grounds into coffee beverage . in one embodiment , coffee machine 700 may further comprise a determining unit 708 configured to control said warming - up unit 702 by determining a warm - up temperature and warm - up time of the coffee grounds . in various embodiments of the present disclosure , heating mechanism adopted by said warming up unit may be induction heating , light - wave heating , heating plate / spring , or other possible means that may be configured to increase temperature of coffee materials . in various embodiments , coffee machines in the present disclosure may further comprise a thermometer ( not shown ) configured to measure the warm - up temperature of the coffee materials . it should be noted that the above described embodiments are given for describing rather than limiting the invention , and it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the invention as those skilled in the art readily understand . such modifications and variations are considered to be within the scope of the invention and the appended claims . the protection scope of the invention is defined by the accompanying claims . in addition , any of the reference numerals in the claims should not be interpreted as a limitation to the claims . use of the verb “ comprise ” and its conjugations does not exclude the presence of elements or steps other than those stated in a claim . the indefinite article “ a ” or “ an ” preceding an element or step does not exclude the presence of a plurality of such elements or steps .
the present invention proposes a method for making coffee beverage using a home used coffee machine comprises warming up coffee materials before brewing ; grinding coffee beans into coffee grounds ; and brewing at least part of said coffee materials to make the coffee beverage ; wherein said coffee materials are coffee beans and / or coffee grounds . the present invention also provides apparatus for making coffee using the above described method .