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US 8,505,316 B2Granted
Direct expansion evaporator
OwnerLingyu Dong, Chundong Donginventors
Life of this patent
Estimating the term…
Abstract
A direct expansion evaporator includes an inner guiding duct defining a feeding channel for guiding raw material, and an outer guiding duct enclosing the inner guiding duct therewithin to form a heat exchange channel between the outer and inner guiding ducts for guiding refrigerant flowing along the heat exchange channel to heat-exchange with the raw material along the feeding channel, wherein a helix indention is formed at the outer guiding duct to form the heat exchange channel partitioned by a helix partition, wherein a peak of the helix partition is biased against an outer surrounding wall of the inner guiding duct to conceal the heat exchange channel along the inner guiding duct in a weld-less manner.
Claims14
A direct expansion evaporator for making frozen product from raw material, comprising:
- a feeding channel having a feeding end and a dispensing end for said raw material feeding through said feeding channel;
- a heat exchange channel thermally communicating with said feeding channel for guiding refrigerant passing through said heat exchange channel to heat-exchange with said raw material within said feeding channel, wherein said heat exchange channel has a pre-cooling portion formed toward said feeding end of said feeding channel and a freezing portion formed toward said dispensing end to thermally communicate with said feeding channel, wherein said feeding channel is arranged for guiding said raw material to flow from said pre-cooling portion of said heat exchange channel to said freezing portion so as to initially pre-cool said raw material when entering into said feeding end of said feeding channel and to substantially freeze said raw material to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel;
- and
- an outer guiding duct and an inner guiding duct coaxially enclosed within said outer guiding duct to define said feeding channel within said inner guiding duct and said heat exchange channel between said outer and inner guiding ducts, wherein a helix indention is formed at said outer guiding duct to form said heat exchange channel partitioned by a helix partition, wherein a peak of said helix partition is biased against an outer surrounding wall of said inner guiding duct to conceal said heat exchange channel along said inner guiding duct in a weld-less manner, wherein said helix partition has a V-shaped configuration that a circumferential size of said peak of said helix partition is slightly smaller than a circumferential size of said outer surrounding wall of said inner guiding duct, such that when said inner guiding duct is coaxially received within said outer guiding duct, said peak of said helix partition is slightly elastic-deformed to bias against said outer surrounding wall of said inner guiding duct so as to form said heat exchange channel between said inner and outer guiding ducts.
1 more element
A direct expansion evaporator for making frozen product from raw material, comprising:
- a feeding channel having a feeding end and a dispensing end for said raw material feeding through said feeding channel;
- a heat exchange channel thermally communicating with said feeding channel for guiding refrigerant passing through said heat exchange channel to heat-exchange with said raw material within said feeding channel, wherein said heat exchange channel has a pre-cooling portion formed toward said feeding end of said feeding channel and a freezing portion formed toward said dispensing end to thermally communicate with said feeding channel, wherein said feeding channel is arranged for guiding said raw material to flow from said pre-cooling portion of said heat exchange channel to said freezing portion so as to initially pre-cool said raw material when entering into said feeding end of said feeding channel and to substantially freeze said raw material to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel, wherein said heat exchange channel has a helix path configuration extended from said dispensing end of said feeding channel to said feeding end thereof;
- and
- an outer guiding duct and an inner guiding duct coaxially enclosed within said outer guiding duct to define said feeding channel within said inner guiding duct and said heat exchange channel between said outer and inner guiding ducts, wherein a helix indention is formed at said outer guiding duct to form said heat exchange channel partitioned by a helix partition, wherein a peak of said helix partition is biased against an outer surrounding wall of said inner guiding duct to conceal said heat exchange channel along said inner guiding duct in a weld-less manner, wherein said helix partition has a V-shaped configuration that a circumferential size of said peak of said helix partition is slightly smaller than a circumferential size of said outer surrounding wall of said inner guiding duct, such that when said inner guiding duct is coaxially received within said outer guiding duct, said peak of said helix partition is slightly elastic-deformed to bias against said outer surrounding wall of said inner guiding duct so as to form said heat exchange channel between said inner and outer guiding ducts.
1 more element
A direct expansion evaporator for making frozen product from raw material, comprising:
- a feeding channel having a feeding end and a dispensing end for said raw material feeding through said feeding channel;
- and
- a heat exchange channel thermally communicating with said feeding channel for guiding refrigerant passing through said heat exchange channel to heat-exchange with said raw material within said feeding channel, wherein said heat exchange channel has a pre-cooling portion formed toward said feeding end of said feeding channel and a freezing portion formed toward said dispensing end to thermally communicate with said feeding channel, wherein said feeding channel is arranged for guiding said raw material to flow from said pre-cooling portion of said heat exchange channel to said freezing portion so as to initially pre-cool said raw material when entering into said feeding end of said feeding channel and to substantially freeze said raw material to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel, wherein a longitudinal width of said heat exchange channel at said dispensing end of said feeding channel is larger than a longitudinal width of said heat exchange channel at said feeding end of said feeding channel.
A method of manufacturing a direct expansion evaporator for making frozen product from raw material, comprising the steps of:
- (a) configuring an inner guiding duct to define a feeding channel therewithin, wherein said feeding channel has a feeding end and a dispensing end for said raw material feeding through said feeding channel;
- (b) receiving said inner guiding duct within an outer guiding duct to form a heat exchange channel between said inner and outer guiding ducts to thermally communicate with said feeding channel;
- (c) configuring said heat exchange channel to form a pre-cooling portion being extended toward said feeding end of said feeding channel and a freezing portion being extended toward said dispensing end;
- and
- (d) guiding said raw material and refrigerant passing through said feeding channel and said heat exchange channel respectively for heat-exchanging, wherein said raw material is initially pre-cooled at said pre-cooling portion of said heat exchange channel when entering into said feeding end of said feeding channel and is substantially frozen at said freezing portion of said heat exchange channel to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel;
- wherein the step (b) further comprises the steps of:
- (b.1) forming a helix indention at said outer guiding duct to form said heat exchange channel partitioned by a helix partition;
- and
- (b.2) slidably and coaxially inserting said inner guiding duct into said outer guiding duct, wherein a peak of said helix partition is biased against an outer surrounding wall of said inner guiding duct to conceal said heat exchange channel along said inner guiding duct in a weld-less manner;
- wherein said helix partition has a V-shaped configuration that a circumferential size of said peak of said helix partition is slightly smaller than a circumferential size of said outer surrounding wall of said inner guiding duct, such that when said inner guiding duct is coaxially received within said outer guiding duct, said peak of said helix partition is slightly elastic-deformed to bias against said outer surrounding wall of said inner guiding duct so as to form said heat exchange channel between said inner and outer guiding ducts.
7 more elements
A method of manufacturing a direct expansion evaporator for making frozen product from raw material, comprising the steps of:
- (a) configuring an inner guiding duct to define a feeding channel therewithin, wherein said feeding channel has a feeding end and a dispensing end for said raw material feeding through said feeding channel;
- (b) receiving said inner guiding duct within an outer guiding duct to form a heat exchange channel between said inner and outer guiding ducts to thermally communicate with said feeding channel;
- (c) configuring said heat exchange channel to form a pre-cooling portion being extended toward said feeding end of said feeding channel and a freezing portion being extended toward said dispensing end, wherein a longitudinal width of said heat exchange channel at said dispensing end of said feeding channel is larger than a longitudinal width of said heat exchange channel at said feeding end of said feeding channel;
- and
- (d) guiding said raw material and refrigerant passing through said feeding channel and said heat exchange channel respectively for heat-exchanging, wherein said raw material is initially pre-cooled at said pre-cooling portion of said heat exchange channel when entering into said feeding end of said feeding channel and is substantially frozen at said freezing portion of said heat exchange channel to form said frozen product before said frozen product is dispensed at said dispensing end of said feeding channel.
2 more elements
A direct expansion evaporator for making frozen product from raw material, comprising:
- an inner guiding duct defining a feeding channel therealong and having a feeding end and a dispensing end for guiding said raw material flowing along said feeding channel from said feeding end to said dispensing end;
- and
- an outer guiding duct, wherein said inner guiding duct is coaxially enclosed within said outer guiding duct to form a heat exchange channel between said outer and inner guiding ducts for guiding refrigerant flowing along said heat exchange channel to heat-exchange with said raw material along said feeding channel, wherein a helix indention is formed at said outer guiding duct to form said heat exchange channel partitioned by a helix partition, wherein a peak of said helix partition is biased against an outer surrounding wall of said inner guiding duct to conceal said heat exchange channel along said inner guiding duct in a weld-less manner, wherein said helix partition has a V-shaped configuration that a circumferential size of said peak of said helix partition is slightly smaller than a circumferential size of said outer surrounding wall of said inner guiding duct, such that when said inner guiding duct is coaxially received within said outer guiding duct, said peak of said helix partition is slightly elastic-deformed to bias against said outer surrounding wall of said inner guiding duct so as to form said heat exchange channel between said inner and outer guiding ducts.
Dependencies are inferred from the claim text.