IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0506834
(2012-05-17)
|
등록번호 |
US-8534086
(2013-09-17)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
A direct expansion evaporator for making a frozen product from raw material includes a feeding channel, a heat exchange channel thermally communicating with the feeding channel, and a refrigerant flowing within the heat exchange channel for exchanging heat between the raw material within the feeding
A direct expansion evaporator for making a frozen product from raw material includes a feeding channel, a heat exchange channel thermally communicating with the feeding channel, and a refrigerant flowing within the heat exchange channel for exchanging heat between the raw material within the feeding channel and the refrigerant within the heat exchange channel in an expanded evaporation manner. Therefore, the refrigerant releases the thermal energy via the phase changing from liquid to gaseous state of the refrigerant. The heat exchange channel has a pre-cooling portion for pre-cooling the raw material at a predetermined temperature and a freezing portion for freezing the raw material to a final predetermined temperature of the frozen product in two-stage evaporation manner. Thus, the direction expansion evaporator provides a relatively more efficient way for making the frozen product, so as to increase the quality of the frozen product.
대표청구항
▼
1. A frozen product device of an ice cream and yogurt machine for making frozen product, including ice cream and yogurt, from raw material, comprising: an outer guiding duct and an inner guiding duct coaxially enclosed within said outer guiding duct;wherein a feeding channel is formed at a space wit
1. A frozen product device of an ice cream and yogurt machine for making frozen product, including ice cream and yogurt, from raw material, comprising: an outer guiding duct and an inner guiding duct coaxially enclosed within said outer guiding duct;wherein a feeding channel is formed at a space within said inner guiding duct, wherein said feeding channel has a feeding end and a dispensing end for said raw material feeding through said feeding channel;wherein a heat exchange channel is formed at a space between said outer and inner guiding ducts in an air-sealed manner and is thermally communicating with said feeding channel through said inner guiding duct, wherein said heat exchange channel has a pre-cooling portion defining from said feeding end of said feeding channel and a freezing portion to said dispensing end to thermally communicate with said feeding channel in a two-stage evaporation manner;wherein said heat exchange channel is guided for refrigerant passing therethrough in order to heat exchange with said raw material within said feeding channel, wherein at said pre-cooling portion, said heat exchange channel is arranged for guiding said refrigerant to helically flow around an outer surface of said inner guiding duct so as to prolong a traveling time of said refrigerant at said pre-cooling portion, wherein at said freezing portion, said heat exchange channel is arranged for guiding said refrigerant to parallely flow along said outer surface of said inner guiding duct so as to maximize an expansion area of said refrigerant between said feeding channel and said heat exchange channel;wherein when said refrigerant flows at said pre-cooling portion of said heat exchange channel, said raw material fed from said feeding end of said feeding channel is initially pre-cooled at a pre-cooling temperature, and when said refrigerant flows at said freezing portion of said heat exchange channel, said raw material is then substantially frozen to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel while being energy efficient. 2. The device, as recited in claim 1, wherein said feeding channel is coaxially aligned with said heat exchange channel. 3. The device, as recited in claim 1, wherein said heat exchange channel is formed in a spiral configuration that a width of said heat exchange channel at said freezing portion thereof is larger than a width of said heat exchange channel at said pre-cooling temperature thereof. 4. The device, as recited in claim 2, wherein said heat exchange channel is formed in a spiral configuration that a width of said heat exchange channel at said freezing portion thereof is larger than a width of said heat exchange channel at said pre-cooling temperature thereof. 5. The device, as recited in claim 1, further comprising a guiding wall extending between said outer and inner guiding ducts at said pre-cooling portion of said heat exchange channel in a spiral manner, wherein said freezing portion of said heat exchange channel has a cylindrical shape for maximizing the expansion area of said refrigerant between said feeding channel and said heat exchange channel, while said pre-cooling portion of said heat exchange channel has a helix shape for prolonging the traveling time at said pre-cooling portion so as to ensure said refrigerant being completely evaporated. 6. The device, as recited in claim 4, further comprising a guiding wall extending between said outer and inner guiding ducts at said pre-cooling portion of said heat exchange channel in a spiral manner, wherein said freezing portion of said heat exchange channel has a cylindrical shape for maximizing the expansion area of said refrigerant between said feeding channel and said heat exchange channel, while said pre-cooling portion of said heat exchange channel has a helix shape for prolonging the traveling time at said pre-cooling portion so as to ensure said refrigerant being completely evaporated. 7. The device, as recited in claim 5, wherein said guiding wall has a trapezoidal cross section that a width of said guiding wall is gradually reducing from said outer guiding duct to said inner guiding duct. 8. The device, as recited in claim 6, wherein said guiding wall has a trapezoidal cross section that a width of said guiding wall is gradually reducing from said outer guiding duct to said inner guiding duct. 9. The device, as recited in claim 7, wherein said helix shape of said pre-cooling portion of said heat exchange channel has a uniform pitch along a helix axis. 10. The device, as recited in claim 8, wherein said helix shape of said pre-cooling portion of said heat exchange channel has a uniform pitch along a helix axis. 11. The device, as recited in claim 1, wherein said outer guiding duct has an inlet and an outlet for guiding a flow of said refrigerant that when said refrigerant flows from said inlet to said outlet, said refrigerant is completely evaporated from liquid phase to gaseous phase for completely converting thermal energy to form said frozen material. 12. The device, as recited in claim 4, wherein said outer guiding duct has an inlet and an outlet for guiding a flow of said refrigerant that when said refrigerant flows from said inlet to said outlet, said refrigerant is completely evaporated from liquid phase to gaseous phase for completely converting thermal energy to form said frozen material. 13. The device, as recited in claim 11, wherein said inlet and outlet of said outer guiding duct are located adjacent to said dispensing end and said feeding end of said feeding channel respectively, such that a feeding direction of said raw material is opposite to a flowing direction of said refrigerant. 14. The device, as recited in claim 12, wherein said inlet and outlet of said outer guiding duct are located adjacent to said dispensing end and said feeding end of said feeding channel respectively, such that a feeding direction of said raw material is opposite to a flowing direction of said refrigerant. 15. The device, as recited in claim 11, wherein said inlet is radially formed at an end of said outer guiding channel at a position close to said dispensing end of said feeding channel, while said outlet is radially formed at an opposed end of said outer guiding channel at a position close to said feeding end of said feeding channel. 16. The device, as recited in claim 12, wherein said inlet is radially formed at an end of said outer guiding channel at a position close to said dispensing end of said feeding channel, while said outlet is radially formed at an opposed end of said outer guiding channel at a position close to said feeding end of said feeding channel. 17. The device, as recited in claim 1, wherein a flowing direction of said refrigerant at said freezing portion of said heat exchange channel is parallel to a feeding direction of said raw material at said feeding channel, while said flowing direction of said refrigerant at said pre-cooling portion of said heat exchange channel is tangent to said feeding direction of said raw material at said feeding channel. 18. The device, as recited in claim 4, wherein a flowing direction of said refrigerant at said freezing portion of said heat exchange channel is parallel to a feeding direction of said raw material at said feeding channel, while said flowing direction of said refrigerant at said pre-cooling portion of said heat exchange channel is tangent to said feeding direction of said raw material at said feeding channel. 19. The device, as recited in claim 1, wherein said refrigerant is in liquid phase under a predetermined high pressure before entering into said heat exchanging channel and is in gaseous phase exiting said heat exchanging channel so as to prevent liquid back flow of said refrigerant along said heat exchange channel and to enhance cooling capacity of said refrigerant. 20. The device, as recited in claim 4, wherein said refrigerant is in liquid phase under a predetermined high pressure before entering into said heat exchanging channel and is in gaseous phase exiting said heat exchanging channel so as to prevent liquid back flow of said refrigerant along said heat exchange channel and to enhance cooling capacity of said refrigerant.
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