How To Buy Good Ice Cream Machines?
FIG. 1 is a front elevation view of a conventional side-by-side refrigerator of the
domestic type having a freezer compartment containing an commercial ice maker in accordance with the present invention;FIG. 2 is a left side elevation view of the refrigerator of FIG. 1;
FIG. 3 is a frontal perspective view of the ice maker in accordance with the present invention with portions cut away, and with its ice tray removed;
FIG. 4 is a longitudinal cross-section view of the ice maker mounted in the freezer compartment of the associated refrigerator illustrated in FIGS. 1 and 2;
FIG. 5 is a top plan view of the ice maker with the ice tray shown in phantom;
FIG. 6 is a side view of the removable ice tray of the ice maker, and its associated pivotal mounting means;
FIG. 7 is an end view of the front end of the ice tray at its normal pivotally mounted position relative to its associated mounting means;
FIG. 8 is an end view of the rear end of the ice tray at its normal pivotally mounted position relative to its associated mounting means;
FIG. 9 is a perspective view of the ice level sensing bail member of the home ice cream makers ;
FIG. 9a is a view along line A--A of FIG. 9 of the ice level sensing bail member of the ice maker;
FIG. 10 is a side view of a detent providing end portion of the ice level sensing bail member of the ice maker;
FIG. 11 is an end view of the portion of the bail illustrated in FIG. 10;
FIG. 12 is an elevation view, from the rear end of the ice maker, of the control circuit board and drive means that is mounted within the hollow rear wall of the ice maker housing;
FIG. 12A is a cross-section view taken along line A--A of FIG. 12;
FIGS. 13A, 13B and 13C sequentially illustrate in schematic fashion the cycle of operation of the drive means for moving the ice tray between an upright ice making position and an inverted ice dumping position, and for moving concurrently with the ice tray the associated ice level sensing bail;
FIG. 14 illustrates a novel mechanism for actuating a test switch enclosed in the hollow rear wall of the ice maker housing;
FIG. 14a is a bottom view of FIG. 14;
FIG. 15 is a schematic diagram of the ice maker manufacturer electronic control circuit; and
FIG. 16 is a control sequence chart illustrating the cycle of operation of the ice maker.
In accordance with the present invention, an automatic ice maker 20 of simplified construction provides generally cube-shaped ice pieces that drop into the open top of the storage bin 18 where they are temporarily stored until fed out of the chute 18a to the dispenser 16. Water is supplied to the ice maker 20 by a conventional, solenoid valve controlled, fill tube 19 as will be subsequently illustrated and discussed in greater detail. The illustrated configuration of the dispenser 16, the storage bin 18, the fill tube 19, and the automatic ice maker 20 is well known in the art.
With reference to FIGS. 3 and 4, the automatic ice maker 20 includes a rectangular housing member formed of molded plastic material, the housing member having a generally open top and bottom defined by a front wall 21, a hollow rear wall 25, a left sidewall 32 and an opposed right sidewall 34. The front wall 21 has an inner side or face 22 and an outer side or face 23. The hollow rear wall 25 has a front face 26, a rear face 27, a pair of opposed side faces 28, a top face 29 and a bottom face 30. The faces 26, 27, 28, 29, 30 of the hollow rear wall 25 define an interior volume which contains an electronic control circuit and an electric motor type drive means for rotating back-and-forth in oscillatory fashion an ice tray 50 (see FIG. 4) of the commercial ice maker as will be subsequently illustrated. An electrical connector 36 (see FIG. 3) is located on the top face 29 of the rear wall 25, electrical power being supplied to the ice maker 20 by way of the connector 36. The fill tube 19 (see FIG. 4) for providing water to the ice maker 20 is supported upon a fill tube pedestal 19a which extends upwardly from a forward portion of the top face 29 as illustrated. The downwardly slanting distal end of the fill tube 19 rests on the pedestal 19a, the tube 19 extending through a rear wall portion 17 of the freezer compartment for connection to a water supply line by means of a nipple portion 19b of the fill tube 19.
The ice maker 20 is fixed in position at the upper end of the freezer compartment 13 (see FIG. 1) by means of a plurality of inverted key hole shaped apertures 32a (see FIG. 3) in the left sidewall 32 of the ice maker housing, the apertures receiving a like plurality of screws 32b that are threaded into apertures in the left sidewall of the freezer compartment 13 (see FIG. 1). As shown in FIG. 4, the circular lower portions of the keyhole apertures 32a have a diameter slightly greater than the heads of the screws 32b so as to permit, when the screws are in a loosened condition, raising of the ice maker 20 to align the screw heads 32b with the circular lower portions of the apertures 32a wherein the screw heads can fit through such lower aperture portions so that the ice maker 20 can then be removed from the freezer compartment for servicing if necessary.
With further reference to FIG. 4, the gelato making machines , shown in its mounted position, has its rear wall 25 located adjacent to an air conveying duct 15 which directs low temperature air across the top of the ice tray 50 to cause freezing of water contained therein. The duct 15 is mounted to the rear wall portion 17 of the freezer compartment as illustrated. As noted earlier, the fill tube 19 extends through the rear wall portion 17 and has its outer end or nipple portion 19b connected to a source of water controlled by a conventional normally closed, solenoid valve (not shown) which, when actuated to an open condition, allows a controlled amount of water to flow from the distal end of the fill tube 19 into the ice tray 50.
The ice maker 20 is fixed in position at the upper end of the freezer compartment 13 (see FIG. 1) by means of a plurality of inverted key hole shaped apertures 32a (see FIG. 3) in the left sidewall 32 of the ice maker housing, the apertures receiving a like plurality of screws 32b that are threaded into apertures in the left sidewall of the freezer compartment 13 (see FIG. 1). As shown in FIG. 4, the circular lower portions of the keyhole apertures 32a have a diameter slightly greater than the heads of the screws 32b so as to permit, when the screws are in a loosened condition, raising of the ice maker 20 to align the screw heads 32b with the circular lower portions of the apertures 32a wherein the screw heads can fit through such lower aperture portions so that the ice maker 20 can then be removed from the freezer compartment for servicing if necessary.
With further reference to FIG. 4, the gelato machines , shown in its mounted position, has its rear wall 25 located adjacent to an air conveying duct 15 which directs low temperature air across the top of the ice tray 50 to cause freezing of water contained therein. The duct 15 is mounted to the rear wall portion 17 of the freezer compartment as illustrated. As noted earlier, the fill tube 19 extends through the rear wall portion 17 and has its outer end or nipple portion 19b connected to a source of water controlled by a conventional normally closed, solenoid valve (not shown) which, when actuated to an open condition, allows a controlled amount of water to flow from the distal end of the fill tube 19 into the ice tray 50.
source:freepatentsonline
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