IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0309749
(1981-10-08)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
2 |
초록
▼
A shell and tube ice-maker has a bottom compartment in which trapped refrigerant gas is present to prevent entry of liquid refrigerant into the compartment during ice-making and from which, during defrosting, hot gaseous refrigerant flows upwardly into the liquid refrigerant which remains in flooded
A shell and tube ice-maker has a bottom compartment in which trapped refrigerant gas is present to prevent entry of liquid refrigerant into the compartment during ice-making and from which, during defrosting, hot gaseous refrigerant flows upwardly into the liquid refrigerant which remains in flooded condition around the tubes, whereby delay in initiating further ice-making is minimized.
대표청구항
▼
1. Apparatus for producing and harvesting ice intermittently comprising vertical shell means having tube means therein, means for supplying water to the interior of said tube means, an accumulator-separator for refrigerant, a first conduit means connecting the lower portion of said accumulator-separ
1. Apparatus for producing and harvesting ice intermittently comprising vertical shell means having tube means therein, means for supplying water to the interior of said tube means, an accumulator-separator for refrigerant, a first conduit means connecting the lower portion of said accumulator-separator to said shell means for supplying liquid refrigerant thereto, a second conduit means connecting the upper portion of the accumulator-separator to the shell means for withdrawing gaseous refrigerant from said shell means, said first and second conduit means being connected to spaced portions of the shell means so that liquid and gaseous refrigerant flow through the shell means is in the same direction during ice making, said shell means having a false bottom at its lower portion which snugly engages said tub means and which constitutes a wall of an enclosed space, restricted flow means in said false bottom, said flow means comprising apertures of predetermined size located intermediate said tube means and substantially preventing liquid flow but permitting gaseous flow, means for supplying relatively high temperature and pressure gaseous refrigerant to the space beneath the false bottom for upward flow through said flow means into said shell means and to cause release of ice from the tube means, and means for retaining the liquid refrigerant within said shell means when said relatively high temperature and pressure gaseous refrigerant is supplied to the space beneath the false bottom for harvesting the ice. 2. The invention of claim 1, and means for supplying liquid refrigerant to said accumulator-separator during ice-making, and stopping said supply during defrosting of said tubes. 3. Apparatus for intermittently producing and harvesting ice comprising shell means having top and bottom walls, a plurality of generally vertical tube means located within said shell means and extending through said top and bottom walls, an inner wall spaced from said bottom wall and generally parallel thereto providing a plenum chamber in the lower portion of said shell means, first conduit means for introducing liquid refrigerant into said shell means between said top wall and said inner wall, second conduit means located at a higher elevation than said first conduit means for withdrawing gaseous refrigerant from said shell means so that liquid and gaseous refrigerant flow through said shell means is in the same direction during ice making, means for introducing water into said tube means for forming ice on the interior thereof during ice making, said inner wall snugly engaging said tube means and having restricted flow means extending generally vertically therethrough, said restricted flow means comprising apertures of predetermined size located intermediate said tube means and substantially preventing the flow of liquid refrigerant into said plenum chamber but permitting gaseous fluid to flow from said plenum chamber into the liquid refrigerant within said shell means during harvesting, means for supplying relatively high temperature and pressure gaseous fluid to said plenum chamber during the harvesting, and means for retaining the liquid refrigerant within said shell means when said relatively high temperature and pressure gaseous refrigerant is supplied to the space beneath the false bottom for harvesting the ice, whereby the gaseous fluid is discharged from said plenum chamber into the liquid refrigerant within said shell means to release the ice from said tube means and permit the ice to fall by gravity therefrom. 4. The invention of claim 3 in which said gaseous fluid is refrigerant gas which is condensed by the liquid refrigerant within said shell means. 5. Apparatus for producing and harvesting ice intermittently comprising vertical shell means having tube means therein, means for supplying water to the interior of said tube means, an accumulator-separator for refrigerant, a first conduit means connecting the lower portion of said accumulator-separator to said shell means for supplying liquid refrigerant thereto, a second conduit means connecting the upper portion of the accumulator-separator to the shell means for withdrawing gaseous refrigerant from said shell means, said first and second conduit means being connected to spaced portions of the shell means so that liquid and gaseous refrigerant flow through the shell means is in the same direction during ice-making, said shell means having a false bottom at its lower portion which snugly engages said tube means and which constitutes a wall of an enclosed space, said false bottom having a plurality of openings intermediate said tubes, valve means associated with each of said openings, said valve means preventing flow of liquid downwardly beneath said false bottom but permitting upward flow of vapor when said valve means is open, means for supplying relatively high temperature and pressure gaseous refrigerant to the space beneath the false bottom for upward flow through said openings into said shell means and to cause release of ice from the tube means, and means for retaining the liquid refrigerant within said shell means when said relatively high temperature and pressure gaseous refrigerant is supplied to the space beneath the false bottom for harvesting the ice. 6. The invention of claim 5 in which said valve means includes a pressure operated check valve. 7. Apparatus for producing and harvesting ice intermittently comprising vertical shell means having tube means therein, means for supplying water to the interior of said tube means, an accumulator-separator for refrigerant, a first conduit means connecting the lower portion of said accumulator-separator to said shell means for supplying liquid refrigerant thereto, a second conduit means connecting the upper portion of the accumulator-separator to the shell means for withdrawing gaseous refrigerant from said shell means, said first and second conduit means being connected to spaced portions of the shell means so that liquid and gaseous refrigerant flow through the shell means is in the same direction during ice making, said shell means having a false bottom at its lower portion which constitutes a wall of an enclosed space, restricted flow means in said false bottom, said flow means substantially preventing liquid flow but permitting gaseous flow, means for supplying relatively high temperature and pressure gaseous refrigerant to the space beneath the false bottom for upward flow through said flow means into said shell means and to cause release of ice from the tube means, valve means in each of said first and second conduit means for controlling flow therethrough, and means for closing said valve means in response to flow of said gaseous refrigerant to said space beneath said false bottom.
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