JP2009216255A - Inverted-cell type ice making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inverted-cell type ice making machine capable of reducing the amount of ice remaining in a state of fixing to a surface of an ice tray in an ice separating process, and properly executing the next ice making process. <P>SOLUTION: This so-called inverted-cell type ice making machine comprises a control device C for executing an ice making process by cooling a cooler 1 in a state of placing the water tray 4 at a horizontal close position, and operating a circulation pump 10, and executing the ice separating process by opening an ice making chamber 2 of the cooler 1 in a state of placing the water tray 4 at an inclined opening position, and heating the cooler 1. The control device C stops squirting of the water from a spiracle 6 to each ice making chamber 2 by the circulation pump 10 before the ice making process is terminated, opens the ice making chamber 2 by tilting the water tray 4, returns the water tray to the horizontal closing position by tilting the water tray 4 again, and executes the ice separating process after keeping the water tray for a prescribed time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a cooler having a plurality of ice making chambers opened downward, and a water tray that is disposed so as to be tiltable so as to close the cooler from below and has a fountain hole at a position facing each ice making chamber. The present invention relates to a so-called reverse cell type ice making machine that performs ice making by fountaining into each ice making chamber from a fountain hole.

  Conventionally, this type of reverse cell type ice making machine is provided with a cooler having a plurality of ice making chambers opened downward and supported in a tiltable manner so as to close the ice making chamber from below at a horizontal closing position. And a water tank that is provided integrally with the water tray and stores water from the upper surface of the water tray through a return hole.

In such an ice making machine, in the ice making process, water in the water tank is sucked up by a circulation pump provided in the water tank and is ejected from a fountain hole formed at a position corresponding to the ice making chamber of the water tray and cooled to a predetermined temperature. Grow ice in each ice chamber. Thereafter, in the deicing step, the ice making chamber is heated by circulating a high-temperature refrigerant gas through the cooler, and the ice surface in the ice making chamber is melted, and the water pan is opened to the inclined position. And As a result, the ice separated from the ice making chamber falls on the water dish, then falls downward along the water dish, and is stored in an ice storage part formed below the water dish.
JP 11-94416 A

  On the other hand, since water used as ice making water is tap water, it contains calcium ions, magnesium ions, and the like. For this reason, impurities such as chalk and minerals are concentrated on the surface of the water dish over time, and precipitate as scales to form fine irregularities. In the deicing step, the ice that has been released onto the water dish falls, so that the surface of the water dish is finely damaged and roughened by the impacting ice.

  As shown in FIG. 5, the ice that has been frozen and grown in the ice making chamber in the ice making process eventually reaches the surface of the water dish, where it freezes in a state of biting into the fine irregularities of the water dish. As a result, the ice and the water tray in the ice making chamber are firmly fixed by the freezing force. It has been found that the fixing force (freezing force) increases as the surface of the water dish becomes rougher as a result of use over time than when a new product whose surface is not rough.

  Then, in this state, the process moves to the ice removal step, and when the water dish is tilted from the horizontal blocking position and pulled away from the ice making chamber, the surface portion of the ice fixed to the surface of the water dish is peeled off from the ice on the ice making room side, As shown in FIG. 6, it remains on the surface of the water dish. As a result, since the surface of the water dish loses remarkably smoothness, it is difficult for the ice that has left the ice making chamber and dropped on the water dish to slide down on the inclined water dish.

  Thereafter, in the ice removal step, each ice making chamber is heated by circulating a high-temperature refrigerant gas through the cooler. As a result, the ice surface that is in contact with the wall of the ice making chamber is melted to release the icing force and release the ice. That is, ice is dropped from an ice making chamber opened downward. However, as mentioned above, the surface of the water dish is icy and rough and loses its smoothness, so there is a situation in which some ice blocks that have fallen from the ice making room remain on the water dish without slipping down. To come.

  Then, the ice removal process is completed while leaving the ice block on the water dish, and when the process proceeds to the ice making process and the water dish is moved back to the horizontally closed position, the ice block is sandwiched between the water dish and the cooler. Ice biting will occur. As a result, the water tray is made without returning to the correct horizontal closing position, and the ice does not grow normally, or worst, the resin water tray is damaged.

  In addition, when ice making is performed normally, the ice in each ice making chamber is connected by a connecting piece (indicated by IP in the figure) formed on the lower surface. Therefore, in the ice removal process, ideally the ice in the ice making chamber behaves as one ice block as a whole, and the entire ice is taken off from the ice making chamber together with sufficient weight and slides on the water dish and falls to the ice storage. It separates into individual ice by the impact. However, as described above, when the surface portion of the ice forming the joining piece is fixed to the water dish and peeled off, the ice in the ice making chamber is individually deiced. Therefore, it takes time because it tries to deicer only by its own weight, and it will be deiced with time difference. This further encourages the falling ice to be caught on the rough surface formed on the surface of the water dish (that is, the ice frozen on the surface of the water dish).

  Further, when the surface portion of the ice generated in the ice making chamber is peeled off to the water dish side, the volume of the ice is reduced accordingly, so that the ice supply amount as a whole is reduced.

  Therefore, the present invention has been made to solve the conventional technical problem, and reduces the amount of ice remaining on the surface of the water dish during the de-icing process, so that the next ice-making process can be appropriately performed. A reverse cell type ice making machine that can be implemented is provided.

  The reverse cell type ice making machine of the present invention is provided with a cooler having a large number of ice making chambers opened downward and tiltable so as to close the ice making chamber of the cooler from below at a horizontally closed position. A water tray provided with a fountain hole at a position facing the chamber, a water tank that receives and stores water from the upper surface of the water dish, a circulation pump that sucks up the water in the water tank and ejects it from the fountain hole, Execute the ice making process to cool the cooler with the pan horizontally closed position and operate the circulation pump, open the ice making chamber of the cooler with the water dish to the inclined open position, and perform the ice removing process to heat the cooler The control means stops the circulation pump before tilting the ice making process, tilts the water dish to open the ice making chamber, and moves the water dish again. After returning to the horizontal blockage position and maintaining for a predetermined period, the de-icing process Characterized by transition.

  According to the present invention, before the ice making process is finished, the temperature of the ice fixed to the surface of the water dish due to the rough surface of the water dish over time is obtained by tilting the water dish once away from the cooler. Can be raised above the ice temperature on the ice making chamber side.

  Then, the water pan is moved back to the horizontal blockage position, and the ice on the water tray side is pressed against the ice on the ice making chamber side. Tie to. Thereby, it is possible to return the ice fixed to the water dish and peeled back to the ice on the ice making chamber side again. As a result, it is possible to shift to the ice-breaking process in a state where the ice in the adjacent ice making chambers are connected by the joining piece, and prevent the decrease in the ice supply amount by preventing the volume of the generated ice from decreasing. . Further, when the water dish is tilted in the deicing process, the surface of the water dish can be kept flat with little freezing for a long time.

  Therefore, in the deicing process, the ice in the ice making chamber is united as a whole and is released from the ice making chamber together, so that the deicing is smooth and the ice falling from the ice making chamber is placed on the water dish. Since the ice slides down smoothly, the fallen ice is prevented from being caught on the fixed ice on the surface of the water dish and staying on the water dish. This can significantly reduce the occurrence of ice biting.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view of an ice making machine IM to which the present invention is applied, FIG. 2 is a perspective view of an inverted cell type ice making unit IU, and FIG. 3 is an ice making unit of the ice making unit IU in a state where the water tray 4 is in a horizontally closed position. FIG. 4 is a side view of the ice making unit of the ice making unit IU in a state where the water tray 4 is in the inclined open position.

  The ice making machine IM in this embodiment is an ice making machine provided with a so-called reverse cell type ice making unit IU, and a main body 29 constituted by a heat insulating box 30 and a reverse cell built in the upper part of the heat insulating box 30. It consists of a mold ice making unit IU. Inside the heat insulating box 30, an ice storage 32 is formed which is located below the ice making unit IU and has an opening on the upper surface.

  The ice storage 32 stores ice produced by the ice making unit IU, and an opening is formed on the front surface. A heat insulating door 33 pivotably supported forward is attached to the front opening so as to be opened and closed. In addition, a full ice switch BSW that closes a contact when a predetermined full ice amount (full ice level) in the ice storage 32 is detected is attached to the inner wall of the ice storage 32.

  Next, the ice making unit IU will be described. The ice making unit IU has a large number of ice making chambers 2 opened downward, the cooler 1 provided with the evaporation pipe 3 of the cooling device R on the outer surface of the upper wall, and each ice making unit at a predetermined horizontal blockage position as shown in FIG. The water tray 4 which closed the chamber 2 from the lower side with a margin and formed a fountain hole 6 (illustrated in FIGS. 5 to 8) and a return hole 7 corresponding to each ice making chamber 2 on the upper surface, and the water tray 4, and a water tank 8 communicating with the return hole 7, and water in the water tank 8 is sucked up and ejected from the fountain hole 6 into each ice making chamber 2 through the water conduit 11 and a distribution pipe (not shown). The circulation pump 10 that circulates, the drive device 15 that includes a reduction gear (gear motor) 16 having a high-speed gear ratio that can rotate forward and reverse to tilt and return the water tray 4, and the water supply electromagnetic valve 12 shown in FIG. It is comprised with the water sprinkler 13 etc. which sprinkle on the upper surface of the water tray 4 at the time of opening.

  Further, a float type water level switch WLSW for detecting the full water level of the supplied ice making water is mounted in the water tank 8. Similarly, a temperature sensor 9 for detecting the temperature of ice making water stored inside is provided in the water tank 8.

  The reduction motor 16 is fixed to the support beam 22 via the mounting plate 23. Connected to the output shaft of the reduction motor 16 is a drive cam 17 having arms 17A extending in opposite directions in the radial direction of the output shaft. One end of a coil spring 18 is attached to the end of the arm 17 </ b> A of the drive cam 17, and the other end of the coil spring 18 is connected to the side surface of the other end of the water dish 4. Thus, one end of the water dish 4 is pivotally supported by the support beam 22 via the rotation shaft 14.

  3 and 4, ASW is a water pan position detection switch composed of a normal self-returning button switch for detecting the horizontal closing position of the water pan 4 by opening and closing the contact. The water pan position detection switch ASW is in a positional relationship with which the arm 17A of the drive cam 17 abuts. When the drive cam 17 rotates clockwise (returns) from the state shown in FIG. When the dish 4 reaches the horizontal closing position, the arm 17A contacts the water dish position detection switch ASW as shown in FIG. 3, thereby closing the contact point of the water dish position detection switch ASW. When the water pan position detection switch ASW is closed, the reverse rotation of the reduction motor 16 is stopped.

  When the drive cam 17 rotates (tilts) counterclockwise from the state shown in FIG. 3 due to normal rotation of the reduction motor 16, the contact of the water pan position detection switch ASW is self-reset and opens. The water dish 4 is stopped at a stage where it is rotated forward for a predetermined time and tilted to the tilt opening position.

  On the other hand, a drain hole is formed on the bottom surface of the water tank 8, and a drain pipe 24 for discharging water in the water tank 8 is connected to the drain hole via a drain valve 25. . A drain pan 26 is disposed immediately below the water tank 8. Therefore, the water discharged from the water tank 8 is led out into the drain pan 26 disposed immediately below the water tank 8. Further, a drain pipe (not shown) is connected to the inner bottom portion of the drain pan 26, and all the water flowing down into the drain pan 26 is discharged to the outside from the drain pipe. In the figure, reference numeral 28 denotes a drain valve cover for preventing condensation water or the like dripping from above from being directly applied to the drain valve 25.

  On the other hand, a machine room 36 is formed in the lower part of the main body 29 so as to be positioned below the ice storage 32. In the machine room 36, a compressor 37, a condenser 38, a condenser blower 39, and an electrical box 40 that accommodates the control device C therein are disposed.

  Next, the control device C of the ice making machine IM of the present invention will be described with reference to FIG. The control device C in the present embodiment is constituted by a general-purpose microcomputer and incorporates a timer 41 as a time limit means. On the input side of the control device C, a full ice switch BSW of the ice storage 32, a water level switch WLSW of the water tank 8, a temperature sensor 9, a water pan position detection switch ASW, and a cooler for detecting the temperature of the side surface of the cooler 1. A temperature sensor 43 and the like are connected. On the other hand, on the output side, the compressor 37 constituting the cooling device R, the condenser blower 39, the hot gas electromagnetic valve 42, the reduction motor 16 provided in the water tray 4, the circulation pump 10, the water supply electromagnetic valve 12, and A drain valve 25 and the like are connected. The hot gas electromagnetic valve 42 is an electromagnetic valve provided in a hot gas pipe (not shown) that allows the high-temperature refrigerant discharged from the compressor 37 to directly flow into the cooler 1.

  With the above configuration, the operation of the ice making machine IM of this embodiment will be described. First, when the power of the ice making machine IM is turned on, the water tray 4 is initialized to the horizontal closing position. In such a state, the control device C opens the water supply electromagnetic valve 12, whereby ice making water is supplied to the water sprinkler 13, sprinkled from the water sprinkler 13 onto the upper surface of the water tray 4, and mainly through the return hole 7. The water is supplied into the water tank 8 through the water.

  When the water tank 8 is full and the water level switch WLSW closes the contact, the control device C closes the water supply electromagnetic valve 12. Next, the control device C detects the temperature of ice-making water in a temperature sensor 9 provided in the water tank 8. Then, it is determined whether or not the temperature of the ice making water has decreased to, for example, + 3 ° C. (set temperature) or less.

  Here, in the ice making process, the refrigerant discharged from the compressor 37 of the cooling device R is condensed and liquefied by the condenser 38, throttled by an expansion valve (not shown), and then supplied to the evaporation pipe 3, where it evaporates. Then, the cooler 1 is cooled. Further, the control device C operates the condenser blower 39 and also operates the circulation pump 10 to circulate the ice making water in the water tank 8 from the fountain hole 6 into each ice making chamber 2 (state shown in FIG. 5).

  Thereby, the ice making water supplied to each ice making chamber 2 of the cooler 1 is cooled, and ice is gradually generated. On the other hand, of the ice-making water ejected from the fountain hole 6, the water that has flowed downward without forming ice is collected into the water tank 8 through the return hole 7.

  Then, the temperature of the ice making water in the water tank 8 decreases, and when the temperature decreases to + 3 ° C. or less, the control device C starts counting by the timer 41 until the predetermined ice making time elapses. Continue control.

  As a result, ice is gradually generated in each ice making chamber 2 of the cooler 1. When the predetermined ice making time has elapsed and the timer 41 has finished counting, the controller C ends the ice making process and stops the condenser blower 39 and the circulation pump 10.

  Here, as shown in the timing chart of FIG. 10, the control device C temporarily stops the condenser blower 39 which has been continuously operated when a predetermined time before the end time of the ice making process, here, 3 minutes before. Thereafter, when a predetermined time before the ice making process ends (45 seconds in the present embodiment), the operation of the circulation pump 10 is stopped and the supply of ice making water from the fountain hole 6 to each ice making chamber 2 is stopped. . Then, the fixed ice prevention process is performed.

  Also in the fixed ice prevention process executed just before the ice making process is completed, the compressor 37 is continuously operated to maintain the cooler 1 at a predetermined cooling temperature. Then, with the circulation pump 10 stopped, the speed reduction motor 16 is rotated forward for a predetermined time (about 15 seconds in this embodiment), the water tray 4 is tilted from the current horizontal closing position, and the ice making chamber 2 is opened. (State of FIG. 6).

  At this time, when the surface of the water dish 4 is rough, the lower end of the ice grown in the ice making chamber 2 is fixed to the water dish 4. The lower end of the ice grown in 2 is separated from the ice in the ice making chamber 2.

  Thereafter, the control device C reverses the speed reduction motor 16 for a predetermined time (about 15 seconds in this embodiment), moves the water tray 4 back to the horizontal closed position, and closes the ice making chamber 2 (state of FIG. 7). .

  As described above, the cooling of the cooler 1 is continued while the tilting operation of the water tray 4 is being performed. Therefore, the ice in the ice making chamber that is continuously cooled by the cooler 1 during the tilting operation of the water tray 4 and the water tray 4 (ice fixed to the water tray 4) are not in contact with each other. Therefore, the ice temperature on the ice making chamber 2 side (for example, 0 ° C. or lower due to the cooling action of the −30 ° cooler 1) is lower than the ice temperature on the water tray 4 side, and the freezing force is increased. On the contrary, the temperature of the ice fixed to the surface of the water tray 4 is higher than the temperature of the ice on the ice making chamber 2 side. As a result, the water tray 4 once separated from the ice making chamber 2 side is returned to the horizontally closed position, and when the ice on the water tray 4 side is pressed against the ice on the ice making chamber 2 side, the ice making chamber for ice on the water tray 4 side is obtained. The surface on the 2 side (upper surface) and the ice on the ice making chamber 2 side freeze firmly, and the fixing force is stronger than the adhesion between the ice lower surface on the water dish 4 side and the water dish 4.

  In this embodiment, the forward rotation time and the reverse rotation time of the speed reduction motor 16 in the fixed ice prevention process are set to 15 seconds, but the ice fixed on the water tray 4 side and the ice on the ice making chamber 2 side can be separated. It is not limited to this as long as the water pan 4 can be tilted as much as possible and can be moved back again. Therefore, the speed reduction motor 16 may be controlled based on the detection of the water pan position detection switch ASW as described later. However, in order to shorten the entire ice making time, the driving time of the speed reduction motor 16 is shorter if it is a time that can achieve an appropriate sticking ice prevention process (a time that allows the minimum water dish opening angle). (The opening angle of the water tray 4 is small) is preferable.

  After that, the water tray 4 is fixed at the horizontally closed position for a predetermined time (about 15 seconds in the present embodiment), and the state where the ice fixed to the water tray 4 is pressed against the ice on the ice making chamber 2 side is fixed and fixed. The ice prevention process (ice making process) is completed and the process proceeds to the ice removal process.

  In the deicing step, the control device C causes the speed reduction motor 16 to rotate forward, and shifts the water pan 4 from the current horizontal closed position to the inclined open position. In this embodiment, the position is shifted to the inclined open position inclined about 22 ° from the horizontal closing position. As a result, the contact is opened (OFF) when the arm 17A moves away from the water pan position detection switch ASW. Along with the movement of the water tray 4, the control device C opens the hot gas electromagnetic valve 42 and circulates the high-temperature gas refrigerant (hot gas) discharged from the compressor 37 through the evaporation pipe 3.

  As a result, when the tilting of the water tray 4 is started, the cooler 1 is heated by the high-temperature gas refrigerant, the surface of the ice making chamber 2 that is in contact with the ice cooler 1 is melted, and each ice making chamber 2 is melted. The frozen ice is removed and falls due to its own weight. At this time, as described above, the ice in the ice making chamber 2 adheres to the ice making chamber 2 side surface (upper surface) of the ice in the water tray 4 side and the ice in the ice making chamber 2 side. Since it is stronger than the adhesion between the lower surface of the ice and the water dish 4, it is possible to significantly reduce the amount of ice remaining on the surface of the opened water dish 4.

  Here, since the water tray 4 which is set to the horizontal closing position closes the ice making chamber 2 with a margin from below, the ice on the ice making chamber 2 side is appropriately connected to the adjacent ice with the connecting piece IP on the lower surface. Can be formed. As a result, by opening the water dish 4 and circulating the evaporating pipe 3 of the high-temperature gas refrigerant, the ices joined by the joining piece IP are easily detached from the ice making chamber 2 by their own weight. .

  For this reason, the lower end of the ice in the ice making chamber 2 adheres and remains on the surface of the water dish 4 so that the above-mentioned connecting piece IP is not formed, and the deicing using gravity cannot be realized properly. This can be avoided in advance, and it is possible to perform appropriate ice removal from the ice making chamber 2 of the cooler 1. Thereby, it is possible to suppress a decrease in the volume of ice supplied to the ice storage and to prevent a decrease in the ice supply amount.

  Then, the control device C opens the water supply electromagnetic valve 12 after the elapse of a predetermined time (in this case, 20 seconds) from the start of opening of the water tray 4 and sprays water for making ice from the water sprinkler 13 onto the upper surface of the water tray 4. In addition, this watering is carried out until the water tray 4 is tilted from the horizontal blocking position to the tilt opening position (in this embodiment, about 40 seconds during this time) until a predetermined time elapses (in this embodiment, 70 seconds from the start of watering). continue.

  Thereby, the ice on the upper surface of the water tray 4 remaining in a small amount is also washed away by the water spray from the water sprinkler 13. Then, the wash water that has washed away the water dish 4 falls into the water tank 8.

  Then, the control device C determines whether or not a predetermined water pan opening time has elapsed from the start of forward rotation of the speed reduction motor 16, and when it has elapsed, the control device C stops the speed reduction motor 16 and stops the tilting of the water tray 4. Let At this time, the water tray 4 is tilted to a predetermined tilt opening position as shown in FIG.

  By executing this deicing process, the ice in each ice making chamber 2 falls onto the water tray 4, and further falls into the ice storage 32 from the front of the water tray 4 to enter the ice storage 32. Stored.

  At this time, the control device C determines whether or not the ice removal is completed based on the temperature detected by the cooler temperature sensor 43 provided on the side surface of the cooler 1. That is, the control device C determines whether or not the temperature detected by the cooler temperature sensor 43 has reached a preset deicing completion temperature. When it is determined that the deicing has been completed, the control device C closes the hot gas electromagnetic valve 42 and reverses the speed reduction motor 16.

  Thereby, the water tray 4 is moved back upward. After that, when the water pan 4 returns to a predetermined horizontal closing position as shown in FIG. 3, the arm 17A of the drive cam 17 contacts the water pan position detection switch ASW and closes the contact (ON). The speed reduction motor 16 is stopped to stop the return movement of the water tray 4.

  After that, the control device C determines whether or not the inside of the ice storage 32 has reached the full ice level by the full ice switch BSW when the ice removing process is completed. If the full ice level has not been reached, the process proceeds again to the ice making process as described above. When the ice making process and the ice removing process are repeatedly executed, and the ice full storage switch BSW determines that the ice storage 32 has reached the full ice level, the control device C shifts to the ice storing process.

  As described above, according to the present embodiment, the amount of ice that remains adhered to the water dish side is smaller than that in the past, so that the surface of the water dish becomes flat with little freezing in the deicing process. As a result, the deiced ice is less likely to stay on the water pan, and as a result, the phenomenon of ice biting can be suppressed.

  In particular, according to the present invention, ice biting can be effectively avoided by controlling the tilting operation of the water tray 4, so that no special design change or parts replacement can be required.

It is a partial notch perspective view of the ice making machine to which this invention is applied. It is a perspective view of a reverse cell type ice making unit. It is a side view of the ice making part of an ice making unit in the state where a water tray is in a horizontal blockade position. It is a side view of the ice making part of the ice making unit in a state where the water tray is in the inclined open position. It is a partial expanded sectional view of the cooler and water tray in an ice making process. It is a partial expanded sectional view of a cooler and a water tray at the time of completion of an ice making process. It is a partial expanded sectional view of a cooler and a water tray at the time of completion of an ice making process. It is a partial expanded sectional view of a cooler and a water tray in an icing process. It is a block diagram of a control apparatus. It is a timing chart at the time of completion | finish of an ice making process and an ice removal process.

Explanation of symbols

IM Ice Maker IU Reverse Cell Ice Maker (Reverse Cell Ice Maker)
ASW Water pan position detection switch BSW Full ice switch WLSW Water level switch C Controller R Cooling device 1 Cooler 2 Ice making chamber 3 Evaporating pipe 4 Water tray 6 Fountain hole 7 Return hole 10 Circulating pump 12 Water supply solenoid valve 13 Sprinkler 14 Rotation Shaft 15 Drive device 16 Deceleration motor 32 Ice storage 33 Thermal insulation door 41 Timer 42 Hot gas solenoid valve 43 Cooler temperature sensor

Claims (1)

A cooler having a large number of ice making chambers opened downward, and a fountain hole at a position facing the ice making chambers, which is disposed so as to be able to tilt backward so as to close the ice making chambers of the cooler from below in a horizontally closed position. A water tank that receives and stores water from the upper surface of the water dish, a circulation pump that sucks up the water in the water tank and ejects it from the fountain hole, The ice making process of cooling the cooler and operating the circulation pump is executed, the ice tray of the cooler is opened with the water pan as an inclined open position, and the ice removing process of heating the cooler is executed. In a reverse cell type ice making machine equipped with a control means,
Prior to finishing the ice making step, the control means stops the circulation pump, tilts the water dish to open the ice making chamber, and moves the water dish again to return to the horizontal closed position. After returning and maintaining for a predetermined period, the reverse cell type ice making machine moves to the ice removing step.

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