Abstract:
A combination water-purification and ice-dispensing system features an air cooler on the ice bin to prevent the congealing of ice. Four slanted agitator blades also break up chunks of ice back into ice cubes. Excess water from the ice maker is recycled into the ice maker. Double shutters prevent the dispensing of contaminated ice. An ice-bag dispenser and taper are included. A single kiosk can have both a purified water and an ice dispenser.

Description:
CROSS REFERENCED PATENTS 
     The water purification aspects of the present invention are described in U.S. application Ser. No. 08/759,134 filed Dec. 2, 1996, now U.S. Pat. No. 5,911,884, issued on Jun. 15, 1999, which is hereby incorporated by reference. 
    
    
     FIELD OF INVENTION 
     The present invention relates to an efficient city water-purification system feeding a vending-machine-style ice dispenser which has an anti-melt ice storage bin featuring an air cooler. 
     BACKGROUND OF THE INVENTION 
     The problem of ice congealing and/or thawing in commercial ice-storage bins has never been fully solved. The present invention solves this problem by adding an air cooler to the ice-storage bin. Additionally, rotating agitator blades set at a proper angle slice the stored ice cubes into small sectors solving the problem of storing ice cubes without congealing in a commercial ice dispenser. 
     Notable attempts to solve this congealing problem include an Ice-O-Matic, Denver, Colo., CD Series Cube Ice Dispenser having a timed agitation of the auger (once every hour). 
     Known in the art are combination auger and rotating agitator blade ice storage bins. Kloppenberg &amp; Company, Englewood, Colo., makes a commercial ice dispenser and bagger that uses a bottom chute in combination with an auger and a rotating agitator blade. However, the agitator blade is semi-circular in shape, and the unit does not have any circulating air-cooler feature. 
     The inventive ice bin of the present invention has been integrated into an efficient reverse osmosis water filtration system in a vending machine kiosk. Related commercial vending machine ice dispensers include U.S. Pat. No. 5,484,538 (1996) to Woodward. Woodward teaches the integration of a reverse osmosis water filter, UV light, and carbon treatment of water in a hot and cold water and ice dispensing compact office-sized unit. 
     A heavy volume purified water and ice dispenser is taught by U.S. Pat. No. 5,112,477 (1992) to Hamlin. Hamlin teaches a reverse-osmosis water filter having a copper-zinc alloy feeding a commercial ice maker and dispenser. The coin-operated unit also features an ice-bag storage and dispensing unit. 
     In summary, the present invention offers a new and non-obvious solution to the problem of preventing ice cubes from congealing in an ice dispenser. An air-cooled ice bin is integrated into a coin-operated reverse-osmosis purified water and ice dispenser. 
     SUMMARY OF THE INVENTION 
     The main aspect of the present invention is to provide an air-cooled ice-storage bin to prevent the congealing of ice. 
     Another aspect of the present invention is to provide rotating agitator blades rotating at about 80° across the longitudinal axis of the rotating auger. 
     Another aspect of the present application is to provide a kiosk having a reverse-osmosis water filtration system, a water dispenser and an ice dispenser having an ice bag dispensing apparatus. 
     Another aspect of the present invention is to provide a double door on the ice bin chute to prevent contamination of the ice. 
     Other aspects of this invention will appear from the following description and appended claims, reference being made to the accompanying drawings forming a part of this specification wherein like-reference characters designate corresponding parts in the several views. 
     The present invention consists of a kiosk having a height of about thirteen feet and width of about nine feet. The kiosk is usually placed outdoors, often in a warm climate such as Texas. A reverse-osmosis water-filtration system purifies and dispenses water in a coin-operated water-dispensing window. Additionally, an ice-dispensing window allows the consumer to buy bags of ice made from the purified water. A bag holder, dispenser, and bag taper are included. A double sliding-door design prevents contamination of the ice bin by closing a first door in a soft-close mode which should persuade a child to remove his hand from the chute. Next, a second door closes with full force to seal the ice bin. If full closure is not achieved with both doors, then a &#34;sold out&#34; sign lights, and the coin receiver and bill acceptor will not accept money. 
     The ice bin receives ice cubes from a commercial ice maker. Once in the bin, the ice is continuously cooled with an air chiller. Periodically, a set of agitator arms churn the ice cubes to further prevent congealing. When ice is directed to be dispensed by the coin receiver and central controller, then an auger rotates at the bottom of the ice bin to propel ice down the exit chute, and an agitator also turns on. 
     Kiosks can be configured with three dispensing windows. Any combination of water and ice dispensing windows can be installed. 
    
    
     BRIEF DESCRIPTION OF TEE DRAWINGS 
     FIG. 1 is a side plan view of the front of the preferred embodiment of the water dispenser. 
     FIG. 2 is a partial cutaway view of the drawing in FIG. 1 showing the maintenance access door and filter system. 
     FIG. 3 is a diagrammatic view of the filter system shown in FIG. 2. 
     FIG. 4 (prior art) is a diagrammatic view of a centrifugal pump storage system. 
     FIG. 5 (prior art) is a diagrammatic view of a bladder type storage tank. 
     FIG. 6 is a schematic view of the filter and storage system. 
     FIG. 7 is the same view as FIG. 6 having the bladder in the deflated state with the outer tank at near maximum storage of purified water. 
     FIG. 8 is a logic flow chart showing the operation of the filter and storage system. 
     FIG. 9 is a front perspective view of the UV portion of the filter system. 
     FIG. 10 is a cutaway view of the ozone generator. 
     FIG. 11 is a side view of the nozzle assembly enclosure. 
     FIG. 12 is a top perspective view of the inside of the nozzle assembly with the nozzle in the retracted position. 
     FIG. 13 is the same view as FIG. 12 with the nozzle in the extended position. 
     FIG. 14 is a front plan view of one filling station. 
     FIG. 15 (prior art) is a sectional view of the pinch valve in the open position. 
     FIG. 16 (prior art) is the same view as FIG. 15 with the pinch valve in the closed position. 
     FIG. 17 is a front plan view of a kiosk configured with one ice dispenser and two water dispensers. 
     FIG. 18 is a front plan view of a kiosk configured with two ice dispensers. 
     FIG. 19 is the same view as FIG. 17 shown in cutaway with the maintenance door opened. 
     FIG. 20 is a front plan view of the ice dispensing window. 
     FIG. 21 is a block diagram showing the relationship of FIGS. 22, 23. 
     FIG. 22 is a block diagram showing the water filtration system and the tap for the ice-maker water supply tank. 
     FIG. 23 is a block diagram of the ice dispensing system. 
     FIG. 24 is a block diagram of the water purification and ice dispensing systems. 
     FIG. 25 is a block diagram showing the relationship of FIGS. 26, 27. 
     FIG. 26 is a logic flow chart of the water filtration system. 
     FIG. 27 is a logic flow chart of the ice dispensing system. 
     FIG. 28 is a top perspective view of the ice bin, air cooler, and bag dispenser. 
     FIG. 29 is a top perspective view of the ice bin with the cover removed. 
     FIG. 30 is a cross-sectional view of the ice bin. 
     FIG. 31 is a longitudinal sectional view of the ice bin taken along line 31--31 of FIG. 30. 
     FIG. 32 is a block diagram of the ice maker and the ice maker water supply tank. 
     FIG. 33 is a top perspective view of the double door of the ice bin with the outer door open and the inner door closed. 
     FIG. 34 is a top perspective view of the double door of the ice bin with the outer door open and the inner door open. 
     Before explaining the disclosed embodiment of the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the particular arrangement shown, since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Water Dispensing Embodiments (FIGS. 1-16) 
     Referring first to FIGS. 1,2 a water dispenser 1001 is shaped like a kiosk having signage 1014 to instruct the consumer how to operate the coin-operated dispensers 1004, 1005. The coin-operated dispensers 1004, 1005 are housed in vend windows 1002, 1003. Each coin-operated dispenser 1004, 1005 has two nozzle protectors 1008, 1009 and 1006, 1007. A separate filler mechanism 120 (FIG. 12) serves each nozzle protector and its nozzle 16 (FIG. 12). 
     In operation the consumer places his five gallon bottle on a ledge 1015. The consumer can place his one gallon bottle on a folding shelf 1012, 1013. The housing 1021 of water dispenser 1001 has maintenance door 1023 for access to the machine room 1022 of FIG. 2. Controller 20 and storage tank 10 are shown. 
     Referring next to FIG. 3 the machinery housed in the machine room 1022 is shown in a schematic format approximately laid out as in the machine room 1022. FIGS. 6,7 are simplified schematics of the same machinery. FIG. 7 shows the inner bladder 11 in the deflated mode. The logic flow chart of FIG. 8 describes the operational sequence of steps. All the numbers of the components are coordinated to be the same. 
     Referring next to FIGS. 3, 6, 7, 8 the city water is first filtered by a 5 micron filter 1. Next an ion exchange water softener 4 removes the hardness from the water. Next the water pressure is regulated at 30 psi by regulator 2. Junction 5 allows the water to flow either into water inlet 13 or into a carbon bed filter 3 to de-chlorinate the water. After the carbon bed filter 3, a second 5 micron filter 21 removes any carbon particles from the water. Water inlet 13 feeds the inner bladder 11. Automatically the inner bladder 11 expands under the direct connect to the 30 psi city water (functional block 801). The controller 20 has a counter which counts the total gallons of the purified water dispensed as measured by the membrane flowmeter 22 (functional block 800). The purified water is stored in the pure water side 1011 of the diaphragm storage tank 10. When the counter reaches a preset limit (functional block 802), the controller turns on the reverse osmosis (RO) pump 7 as depicted by functional block 803 and opens the solenoid 6 (functional block 804). The RO pump 7 draws water from both the city water line and the inner bladder 11 through the carbon bed filter 3 and the second 5 micron filter 21. Junction 5 shows the blending of the waters (functional block 805). In a known manner the RO membrane 8 returns about 50% of its input to drain as this water is the high concentrate by-product of the RO process (functional block 806). Inlet 9 shows where the purified water from the RO membrane 8 enters the pure water side 1011 of the diaphragm storage tank 10 (functional block 807). Pressure limit switch 18 shuts off the RO pump (functional blocks 808, 809). 
     The vendor nozzles 16 dispense water under the control of the coin-operated dispensers (FIG. 2, numbers 1004, 1005). The water is further filtered by the carbon polishing filter 14 and the UV sterilizer 15 as it flows from the pure water outlet 12. All dispensed purified water is volumetrically measured by vend flowmeter 19. The ozone generator 17 constantly discharges ozone in the vendor nozzle 16 environment. 
     The above system reduces the need for a traditional centrifugal pump 400 as shown in FIG. 4. Centrifugal pumps are notoriously prone to breakdown. Also, the above system uses the 30 psi city water pressure in part to force the purified water from the pure water side 1011 of the tank 10, thus conserving energy. The storage tank 401 of FIG. 4 serves the same purpose as the pure water side 1011 of tank 10 of FIGS. 6,7. 
     Another prior art system is shown in FIG. 5. The diaphragm storage tank 500 is used in a known manner wherein the bladder 502 is pressurized in order to provide the force to flow the purified water from the pure water side 501 of the tank 500. However, about 85 gallons of air is needed for exit pressure. Thus, only 35 gallons of the 120 gallon tank can store pure water. This space loss is unacceptable in kiosks where space is at a premium. The present invention uses the efficiency of the FIG. 5 air bladder system while saving 85/120 (70%) of the storage tank size requirements. 
     In summary the process described above can be described as: 
     pre-filtering city water; 
     piping the pre-filtered water into an inner bladder of a diaphragm storage tank, to provide pressure to dispense pure water from the diaphragm storage tank; 
     storing RO filtered water in the pure water storage side of the diaphragm storage tank; 
     feeding an RO pump with a blend of the stored water in the inner bladder and the pre-filtered city water which has been de-chlorinated; 
     dispensing the filtered water in the pure water storage side of the diaphragm storage tank after further filtering the water; 
     measuring the volume of dispensed water; and 
     controlling the RO pump by the measuring the volume of dispensed water so as to maintain a selected minimum volume of water in the pure water side of the diaphragm storage tank. 
     Referring next to FIG. 9 the UV sterilizer 15 is shown with its front cover removed. The housing 91 is preferably made of stainless steel. The UV lamp 92 is known in the art. Water pipes 93, 94, preferably made of quartz, are transparent to allow the water to be exposed to the UV light. 
     Referring next to FIG. 10 the ozone generator 17 has a housing 101 enclosing a fan 102 and an ozone lamp 103. Outlet hoses AA, BB each serve a filler mechanism 120. Since each vend window has two filler mechanisms 120, each outlet hose AA, BB has a T connection not shown. 
     Referring next to FIG. 11 a filler mechanism 120 has a removable housing 121 having a locking screw 112. The ozone is fed in through hose AA. The water inlet connection 122 is a hard screw type to allow quick disconnect for maintenance. Pneumatic lines 123 power all the moving parts while electrical wires 124 serve the micro switches in the filler mechanism. 
     Referring next to FIG. 12 the filler mechanism 120 has two basic assemblies. The moving pinch valve assembly 140 controls the flow of water and the extension/retraction of the nozzle 16. The shutter assembly 141 forbids access to the nozzle 16 when the filler mechanism is in the passive mode. 
     The moving pinch valve assembly 140 consists of a flexible water inlet tube 125 and a pinch valve 126 which is mounted to a sliding block 133. The sliding block 133 slides on guide posts 128, 129. A mounting bracket 127 secures the nozzle 16. An actuator 130 having a push rod 131 controllably moves the sliding block into either the retracted position shown or the extended position shown in FIG. 13. The limit switch 132 senses when the sliding block is in the retracted position. The controller 20 closes the shutter 142 when the limit switch 132 senses the sliding block is in the retracted position. The limit switch 150 senses when the nozzle assembly is in the fully extended position so the controller 20 can initiate the dispensing of water. 
     The shutter assembly 141 consists of a shutter 142, guide posts 143, 144 and an actuator 145 having a push rod 146. The drainage groove 147 diverts water drips to the side of the housing. The limit switch 148 senses the retracted position of the shutter 142. When the shutter is in the retracted position, the controller 20 activates the nozzle assembly to extend. Preferably both the pinch valve and shutter actuators are pneumatic. However, electric pinch valves are also used. FIG. 13 shows the shutter 142 open and the nozzle 16 extended through hole 151. Hole 151 aligns with hole 152 of the clear plastic baseplate 153. The nozzle protector 1006 is shown in FIG. 1. Bolts 154 secure the baseplate 153 to the base 155 of the filler mechanism 120. 
     Referring next to FIG. 14 the vend window 1002 is filling a one gallon bottle 1401 and a five gallon bottle 1400. The folding shelf 1013 is supporting the one gallon bottle. The coin operated dispenser 1004 is designed for one user having multiple bottles to fill. A bill acceptor 1404 and a coin slot 1405 accept money. A coin return button 1406 returns money. A credit display 1407 shows the user how much money he has deposited. There is a five gallon start button 1419, 1408 on each side. There is a one gallon start button 1409, 1410 on each side. The LED lights 1411, 1412, 1413, 1414 indicate which button has been pushed. Bottle pictures 1415, 1416, 1417, 1418 prompt the user to press the correct button for his bottle size. 
     Referring next to FIGS. 15, 16 the pinch valve 126 is seen to have a housing 1252, a base 1256 and a piston 1254. Pressurized air entering inlet 1257 drives the piston 1254 against the hose 125 which has an orifice 1250. In FIG. 15 the hose 125 rests in space 1255 and air pressure holds the piston upwards in an open position. In FIG. 16 the spring 1253 has moved the piston 1254 to a normally closed position thus closing orifice 1250 down into a closure 1251. 
     Water and Ice Dispensing Embodiments (FIGS. 17-34) 
     Referring next to FIG. 17 the preferred embodiment, water and ice kiosk 2001 is shown. Ice dispensing signage 2014 instructs the consumer how to operate the ice dispensing window 2003. Ice cubes will fall from chute 2004 into a consumer&#39;s container or bag (not shown). Portions of a commercial ice maker and a custom air cooler for the ice bin including two compressors and two receivers are housed under the roof cap 2002 on the roof of the kiosk 2001. If the consumer wants an ice bag, then one is dispensed from the bag dispenser 2007. The consumer can then hang the bag on hooks 2005. 
     Referring next to FIG. 18 the kiosk 2010 is configured with two ice dispensing windows 2021, 2022. 
     Referring next to FIG. 19 the kiosk 2001 of FIG. 17 is shown in a partial cutaway view with the service door 2023 open. The roll of bags 2020 can be seen. After dispensing individual bags and filling with ice, the bags are sealed with the tape wrap 2017. A commercial ice-cube maker 2019 is mounted above the ice bin 2028. Motors 2025, 2026 power the auger and agitator inside the ice bin 2028. An air cooler 2027 circulates cold air inside the ice bin 2028 to prevent melting of the ice. The air cooler 2027 has a compressor 2030 and a receiver tank 2031. The ice-cube maker 2019 has a compressor 2032 and a receiver tank 2033. The units 2030-2033 are located on the roof of the kiosk 2001 for space saving and maintainability considerations since the inside of the kiosk 2001 is filled with a water-purification system as shown in FIGS. 22, 23. 
     Referring next to FIG. 20 the ice dispensing window 2003 is shown in detail. A consumer may place his ice container on the pedestal 2010 which is a grate having a drain. Alternatively, the consumer could buy an ice bag 2009 from the bag dispenser 2007. The hanging ice bag 2006 is shown in dots suspended from hooks 2005. The ice chute 2004 directs ice cubes into either the ice bag or the consumer&#39;s container (not shown). The tape wrap 2017 allows the consumer to tape the ice bag closed. Coins are put into the slot 2012. A coin return button 2011 is provided. The credit display 2013 shows the consumer how much he has deposited. A &#34;correct change only&#34; light 2050 lights up when the coin changer is out of change. When the proper coinage is received, the ice enabling light 2053 and/or the bag enabling light 2052 flashes. To receive his merchandise, the consumer then pushes the ice button 2014 and/or the bag button 2015. A coin return 2016 is provided. A dollar bill acceptor 2018 is also provided. A &#34;sold out&#34; light 2051 lights up for out of ice conditions or when an ice bin door is jammed. The machine is automatically disabled at this time by the controller 10,000. 
     Referring next to FIGS. 21-23 the combined purified water and ice-cube dispensing systems are shown in block diagrams. FIG. 3 and its description is identical to FIG. 22 except for the &#34;T&#34;-junction 2200 of the ice-maker supply line 2201 into the pure water outlet line 12. 
     In FIG. 23 an ice maker supply tank 2300 is fed by ice maker supply line 2201 and is located inside the kiosk 2001. A float switch 2301 maintains a desired water level by means of a closed loop between the float switch and the inlet solenoid valve 2302. A pump 2303 feeds the ice maker 2019 which is preferably a Hoshizaki® Model KM1600S Series. Two excess water return lines 3203 reclaim the excess water which is traditionally discarded. Three forces act to prevent the congealing of ice in the bin. First, a thermostat 2304 cycles an air cooler 2027. Second, an agitator 2305 periodically breaks up the ice cubes. Third, an auger 3100 pulls ice cubes along the bottom of the bin 2028 when ice is called for. The ice cubes flow from the ice maker 2019 in direction A and from the ice bin 2028 in direction B. The external safety shutter 3302 discourages tampering, and the internal vend shutter 3301 controls the flow of ice cubes to the chute 2004. The auger controls the ice flow through door 3301. 
     Referring next to FIG. 24 a schematic view identical to FIG. 7 is shown with the addition of the &#34;T&#34;-junction 2200, ice-maker supply line 2201, and the ice dispensing system as shown and described in FIG. 23. 
     Referring next to FIGS. 25-27 FIG. 26 is identical to FIG. 8 with the addition of the ice-maker supply line. 2201. 
     Referring next to FIG. 27 the following logic is incorporated into the controller 10,000. The ice maker makes ice cubes until the ice-bin high-level sensor shuts the ice maker off (functional blocks 2700, 2701, 2702). If the ice-bin level falls below a low-level sensor, then the &#34;sold out&#34; sign lights up, and the ice maker continues to make ice (functional blocks 2703, 2720, 2700). Whenever the ice-bin level is above the low-level sensor, the system is ready to vend ice (functional block 2704). Automatically after six vends, the ice maker restarts to make ice (functional block 2705). 
     A separate closed loop-control subsystem keeps the icemaker supply tank 2300 full. The float switch 2301 and a low water level (functional block 2780). If the water level is low, then the solenoid valve 2302 is opened for a preset time to fill the tank 2300 (functional blocks 2781, 2782, 2783) and turn on the pressure pump 2303 on the ice maker 2019 (functional block 2784). A unique feature of the ice maker is to collect the excess water and re-use it to make ice (functional block 2785). 
     When the consumer pays (functional block 2706), he may choose to also pay for an ice bag. If he so pays, then he must push the ice-bag button (functional blocks 2707, 2712). The system can be programmed to dispense an ice bag for free. Whether the consumer buys a bag or not, he must push the ice button (functional block 2708). When the ice button is pushed, the system opens the primary and secondary shutter doors (functional blocks 2709, 2710). If either shutter door doesn&#39;t open, then the feed auger and agitator do not turn on. If the shutter doors do open, then the ice auger and agitator do turn on, thereby dispensing ice (functional blocks 2709, 2710, 2711). Both shutter doors should close after the timed dispensing of ice. If they do, then the system is ready to vend ice. If not, then the controller disables the coin receiver, and the &#34;sold out&#34; light lights up (functional blocks 2712, 2713, 2714). 
     At all times, the ice-bin temperature is monitored (functional block 2715). If the temperature rises above the set point, then the cooler is turned on. When the ice bin reaches the set-point temperature, then the cooler is turned off (functional blocks 2716, 2717, 2718). 
     The agitator is controlled by the controller to operate periodically regardless of whether ice is dispensed (functional block 2719). 
     Referring next to FIG. 28 the ice maker 2019 (preferably a Hoshizaki® KM 1600S Series) feeds ice cubes into the top of the ice bin 2028 through hole 2800. Essentially there are four ways the system prevents the ice cubes from congealing. First, the walls, top and bottom of the ice bin are insulated. Second, the air cooler 2027 blows cold air into the ice bin through hole 2801. The polarity of the fans 2815, 2816 may be reversed to blow cold air down through hole 2817 and draw air from hole 2801. Third, the agitator shaft 2802 is powered by motor 2025 by means of sprockets 2804, 2805, and chain and clutch 2806. Fourth, the auger shaft 2803 is powered by motor 2026 by means of sprockets 2807, 2808 and chain 2809. The upper-limit ice-level sensor 2810 and a counter in the controller 2811 feed data to the controller 10,000 to turn on the ice maker 2019 unless the ice bin is full. A low-level sensor 2813 activates the &#34;sold out&#34; sign via the controller 10,000. A view port/access port 2812 allows a maintenance technician to inspect the ice bin without opening it. The thermostat 2814 measures the air temperature in the ice bin 2028 to control the on/off status of the air cooler by means of a temperature control unit. 
     The air cooler 2027 has fans 2815, 2816 which draw air 2817 from the ice bin 2028 via the ductwork 2818 back into the air cooler 2027 and over the cooling coils 2819. The compressor for the cooling coils is shown in FIG. 19 on the roof of the kiosk 2001. 
     Referring next to FIG. 29 the &#34;U&#34;-shaped interior of the ice bin 2028 can be seen. Agitator shaft 2802 turns agitator blades 2900, 2901, 2902, 2903. Blades 2901, 2902 are parallel. Blades 2900, 2903 are parallel. Blade sets 2901, 2902 are set off 90° (θ 2 ) from blade sets 2900, 2903. Auger shaft 2803 turns auger blades 2904 to dispense ice cubes through hole 2905. 
     Referring next to FIG. 30 each agitator blade member of a blade set 2901, 2902 is set off 90° from the outside blade set 2900, 2903. The walls, top and bottom, of ice bin 2028 contain insulation 3000. Hole 2905 has a bridge 2976 to prevent ice from falling through the hole after the auger 2904 stops turning. The dotted lines show the position of the blades in FIG. 29. 
     Referring next to FIG. 31 it can be seen that angles θ 3  and θ 4  are equal and approximately 14° off perpendicular from the agitator shaft 2802. 
     Referring next to FIG. 32 all items below line B are novel. All items above line B are prior art. The ice maker 2019 usually discharges and wastes all water not captured in the ice cubes. The present invention adds two reclaim lines 3202, 3203 to recycle the excess ice harvest overflow water from the ice maker 2019. In FIG. 23 these two lines are abbreviated functionally as line 3203. The excess harvest water is returned to the top of tank 2300. 
     The ice-maker supply tank 2300 has a float switch 2301 which regulates the solenoid valve 2302. The pressure pump 2303 takes water from the bottom of the tank 2300 via line 3205 and pumps the water into the ice maker 2019 via line 3206. 
     Referring next to FIG. 33 the ice shutter assembly 3300 has two pneumatically controlled sliding doors 3301, 3302. Door 3301 has hole 3303 which allows ice to be augured out of the ice bin 2028. Door 3301 has a considerable closing force which could injure fingers. However, door 3302 is a safety door having a minimal closing force which will not injure fingers. If door 3302 cannot close, then door 3301 will not be initiated to close by the controller 10,000. FIG. 33 shows both doors closed. FIG. 34 shows both doors open. 
     Although the present invention has been described with reference to preferred embodiments, numerous modifications and variations can be made and still the result will come within the scope of the invention. No limitation with respect to the specific embodiments disclosed herein is intended or should be inferred.