JP4740000B2 - Reverse cell ice machine - Google Patents

Description

  The present invention relates to a cooler having a plurality of ice making chambers opened downward, and a water dish provided with a fountain hole at a position facing each ice making chamber. And 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 ice making machine, in particular, a reverse cell type ice making machine, is provided with a cooler having a large number of ice making chambers opened downward and tiltable so as to close the cooler from below in a horizontally closed position. A water tray provided with a fountain hole at a position facing each ice making chamber, a water tank provided integrally with the water tray for receiving and storing water from the top surface of the water tray, and water in the water tank It is comprised with the circulation pump which sucks up and ejects from a fountain hole, and the water sprinkler which sprinkles on the surface of a water tray.

  And the said reverse cell type ice maker performed ice making by repeating an ice making process and an ice removal process alternately.

  That is, in the ice making process, first, water is supplied from the sprinkler into the water tank. When the water in the water tank becomes full, the circulation pump is driven and the circulation pump drives the water in the water tank from the fountain hole. Is ejected into each ice making chamber. At the same time, the cooling device is driven to evaporate the refrigerant in the cooler. Each ice making chamber is cooled by the cooling action by heat absorption of the refrigerant. As a result, ice is generated in each ice making chamber. At this time, of the water ejected from the fountain hole, the remaining water that does not become ice is collected in the water tank.

  When ice is generated in the ice making chamber by the ice making process described above, the process proceeds to the ice removing process. In the ice making process, the water pan that has closed the ice making chamber at the horizontal closing position is tilted downward. At this time, water remaining in the water tank flows from the drain outlet onto the drain pan. In addition, the water sprayed from the water sprinkler onto the water tray, and the ice adhering to the surface of the water tray is washed away. The washing water also flows down into the water tank and then flows from the drain outlet onto the drain pan. The water pan tilted downward is stopped at the tilt opening position.

  On the other hand, when the process moves to the ice removal stroke, hot gas (high-temperature and high-pressure refrigerant gas) flows directly from the compressor of the cooling device to the cooler. As a result, the ice is detached from the ice making chamber, and the detached ice falls and is stored in an ice storage section provided below.

When the ice removal is completed, the water tray is moved back upward and stopped when the horizontal closed position is reached, and in that state, the ice making process is started again, and the above ice making process is repeated again (for example, patents) Reference 1).
Japanese Patent Publication No. 61-50231

  As described above, in the conventional reverse cell type ice making machine, all of the ice making residual water remaining in the water tank after the ice making is completed and the washing water of the subsequent water dish are drained. More than half of the water supplied. For this reason, it was eagerly desired to save water by reducing the amount of drainage. However, impurities such as calcite and minerals contained in tap water remain after the ice making residual water, and similarly, the impurities are likely to remain in the washing water of the water dish in addition to debris. For this reason, if it is continuously reused without draining, the concentration of impurities contained in the water increases, exceeding the saturation concentration and causing the inconvenience of precipitation of scale. When the scale is deposited in this manner, for example, the scale accumulates between the ice making chamber and the water tray, the water tray cannot close the ice making chamber, and ice making is performed with the water tray and the ice making chamber slightly separated. Will be. That is, the water sprayed from the fountain hole into each ice making chamber also flows into the gap between the water tray and the ice making chamber, and ice is also generated in the gap, so that the adhesion between the ice and the water tray is strengthened. When the water dish is tilted during the ice-breaking process, the water dish becomes difficult to separate from the ice, and an excessive load is applied to the water dish and the driving device for moving the water dish.

  Furthermore, the scale has blocked the fountain hole of the water tray, which has hindered the ejection of water into the ice making chamber and hindered the operation of the circulation pump.

  The present invention has been made to solve the conventional technical problem, and in the reverse cell type ice making machine, the ice making residual water and the water dish washing water remaining in the water tank which has been discharged conventionally are effectively used. The purpose is to reduce water consumption.

  The reverse cell type ice making machine according to the first aspect 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 cooler from below at a horizontal closing position. A water tray with a fountain hole at a position facing the chamber, a water tank that is provided integrally with the water tray and receives and stores water from the top surface of the water tray, and sucks up water in the water tank. The water tank is provided with a circulation pump for ejecting from the fountain hole and a water sprinkler for spraying water on the upper surface of the water tray. The water tank has water inside at an inclined open position where the water tray opens the ice making chamber of the cooler. It is characterized by having a structure in which water remains, and provided with a drain valve for discharging water in the water tank.

  A reverse cell type ice making machine according to a second aspect of the present invention is characterized in that the drain valve is opened when the ice making process is executed a predetermined number of times.

  According to a third aspect of the present invention, there is provided a reverse cell type ice making machine according to the first aspect of the present invention, wherein a water quality sensor is provided in the water tank, and the impurity concentration of water in the water tank detected by the water quality sensor is set to a predetermined upper limit value. When it reaches, it is characterized by opening the drain valve

  The reverse cell type ice making machine according to the invention of claim 4 is provided with a cooler having a large number of ice making chambers opened downward and tiltable so as to close the cooler from below at a horizontal closing position. A water tray with a fountain hole at a position facing the chamber, a water tank that is provided integrally with the water tray and receives and stores water from the top surface of the water tray, and sucks up water in the water tank. A water pump discharged from the water tank at an inclined open position where the water tray opens the ice making chamber of the cooler, provided with a circulation pump for spraying from the fountain hole and a water sprinkler for spraying water on the upper surface of the water tray. It is characterized by comprising a drainage receiving part for receiving water and supplying the water received by the drainage receiving part to the watering device.

  According to the first aspect of the present invention, the cooler having a large number of ice making chambers opened downward, and disposed so as to be tiltable so as to close the cooler from below at the horizontal closing position, and face each ice making chamber. A water tray having a fountain hole at a position, a water tank that is provided integrally with the water tray and receives and stores water from the upper surface of the water tray, and sucks up water from the water tank and ejects it from the fountain hole In a reverse cell type ice maker equipped with a circulating pump and a sprinkler for spraying water on the upper surface of the water tray, water remains in the water tank at an inclined open position where the water tray opens the ice making chamber of the cooler. In addition, since the drain valve for discharging the water in the water tank is provided, the water can remain in the water tank and can be reused at the next ice making. As a result, it becomes possible to reduce the amount of water consumption and to reduce the running cost.

  In particular, when the ice making process is executed a predetermined number of times as in the invention of claim 2, if the drain valve is opened, the concentration of impurities such as chlor and mineral contained in the water remaining in the water tank is saturated. Since the residual water can be discharged before the concentration is reached, the inconvenience of scale precipitation can be eliminated.

  Further, a water quality sensor is provided in the water tank as in the invention of claim 3, and the drain valve is opened when the impurity concentration of the water in the water tank detected by the water quality sensor reaches a predetermined upper limit value. For example, the concentration of impurities in the water tank can be accurately grasped, and accurate drainage can be performed according to the degree of contamination of the water. Thereby, it becomes possible to suppress water consumption as much as possible.

  According to invention of Claim 4, it arrange | positions so that it can be tilted back so that a cooler may be closed from the lower part in a horizontal obstruction | occlusion position, and the cooler which has many ice making chambers opened downward, and opposes each ice making chamber A water tray having a fountain hole at a position, a water tank that is provided integrally with the water tray and receives and stores water from the upper surface of the water tray, and sucks up water from the water tank and ejects it from the fountain hole In a reverse cell type ice maker equipped with a circulating pump for spraying and a sprinkler for spraying water on the upper surface of the water tray, the water tray receives water discharged from the water tank at an inclined open position that opens the ice making chamber of the cooler. Since it has a drainage receiving part and configured to supply water received at this drainage receiving part to the water sprinkler, a part of the water discharged from the water tank is stored and reused at the drainage receiving part. Can do. As a result, it becomes possible to reduce the amount of water consumption and to reduce the running cost.

  The present invention aims to save water in a so-called reverse cell type ice making machine, and water is retained inside the water tank at an inclined open position where the water tray opens the ice making chamber of the cooler. This was realized by providing a drain valve for discharging the water in the water tank as well as the structure. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a partially cutaway side view of a reverse cell type ice making machine showing an embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of the reverse cell type ice making machine of this example. The ice making machine of the present embodiment shown in each figure includes an ice making unit having a cooler 1 having a plurality of ice making chambers 2 opened downward and a water tray 4 for closing each ice making chamber 2 from below. 4 is a predetermined horizontal closing position where the ice making chamber 2 is closed from below, and a predetermined inclination opening position where the water tray 4 opens the ice making chamber 2 by performing water making process by spraying water from the water tray 4 to each ice making chamber 2. This is an ice making machine called a so-called reverse cell type that performs an ice removing process for heating the cooler 1.

  The ice making unit closes each ice making chamber 2 from below with a margin at each of the ice making chambers 2 and the cooler 1 provided with the evaporation pipe 3 of the cooling device on the outer surface of the ice making chamber 2 at a predetermined horizontal closing position. A water tray 4 having a fountain hole 6 and a return hole 7 formed at a position facing each ice making chamber 2, a water tank 8 provided integrally with the water tray 4, and communicating with the return hole 7, and a water tank 8 The water pump sucks up water, circulates from the fountain hole 6 through the water guide pipe 11 and the distribution pipe 5 and circulates to each ice making chamber 2, and the forward / reverse high-speed gear that tilts and returns the water tray 4. A drive unit 15 having a ratio reduction motor 16 and a water sprinkler 13 that sprinkles water on the upper surface of the water tray 4 when the water supply electromagnetic valve 12 is opened.

  The reduction motor 16 is supported by a mounting plate (not shown) fixed to the support beam 22, and the output shaft of the reduction motor 16 has a first arm extending in the opposite direction of the radial direction of the output shaft. A drive cam having 17 and a second arm 18 is attached. One end of a coil spring 19 is attached to the end of the first arm 17 of the drive cam, and the other end of the coil spring 19 is connected to the side surface of the other end of the water dish 4. As a result, the other end of the water dish 4 is connected to the end of the first arm 17 via the coil spring 19. Further, one end of the water dish 4 is pivotally supported by the support beam 22 via the rotation shaft 14.

  The water tray 4 is arranged to be tiltable so as to close the ice making chambers from below at the horizontal closing position. Specifically, the tilting motion of the water pan 4 is caused by the reduction motor 16, the first arm 17 attached to the output shaft thereof, the end of the first arm 17, and the water pan 4. This is done by a driving device 15 comprising the coil spring 19 connected between the ends.

  The position of the water dish 4 is detected by a contact-type water dish position detection switch 20 fixed to the support beam 22. The water pan position detection switch 20 is a contact-type water pan position detection switch for detecting the horizontal closed position and the tilt open position of the water dish 4 based on the open / close state of a contact point of a switching lever (not shown). The water pan position detection switch 20 is provided on the support beam 22, and the switching lever of the water pan position detection switch 20 is arranged at a position where the first and second arms 17 and 18 of the drive cam come into contact with each other. ing. When the drive cam rotates counterclockwise in FIG. 1 due to normal rotation of the reduction motor 16, the water pan 4 tilts, and when the tilt opening position is reached, the second arm 18 comes into contact with the switching lever. As a result, the contact of the water pan position detection switch 20 is closed and switched to the reverse side. That is, when the second arm 18 abuts from the front side of the switching lever of the water pan position detection switch 20 and is pushed rearward, the switching lever is switched, the contact is closed, and switching is reversed to the backward movement side.

  When the drive cam rotates in the clockwise direction in FIG. 1 due to the reverse rotation of the speed reduction motor 10, the first arm 17 comes into contact with the switching lever when the water pan 4 reaches the horizontal closed position, thereby the water pan position detection switch. The 20 contacts are opened and switched to the tilt side. That is, when the first arm 17 comes in contact from the rear side (left side in FIG. 1) of the switching lever of the water pan position detection switch 20 and is pushed forward (right side in FIG. 1), the switching lever is switched and contacts are made. Is opened and switched to the tilt side.

  Here, the water tank 8 of the reverse cell type ice making machine of the present invention will be described in more detail with reference to the sectional view of FIG. The water tank 8 has a structure in which water remains in an inclined open position where the water tray 4 opens the ice making chamber 2 of the cooler 1. Specifically, the water tank 8 of the present embodiment has a bottom surface 8A that is horizontal at the inclined open position, and a tip portion of the bottom surface 8A that is opposite to the side pivotally supported by the rotating shaft 14 is the bottom surface 8A. And a standing part 8B that rises in a vertical direction in a vertical direction, and a drain port 23 is formed at the upper edge of the standing part 8B. Thereby, in the inclined open position where the water tray 4 opens the ice making chamber 2 of the cooler 1, the water in the bottom of the water tank 8 is blocked by the upright portion 8 </ b> B, and does not flow out from the drain outlet 23. It is comprised so that it may remain in.

  Further, the outer periphery of the drain port 23, that is, the front side opposite to the water tank 8 is a drain guide plate 9 for guiding water in the water tank 8 discharged from the drain port 23 to the lower rear side. Covered. The drainage guide plate 9 allows all the water discharged from the water tank 8 to flow in a drain pan 26 located directly below the water tank 8 without flowing from a drain outlet 23 to an ice storage section (not shown) provided on the lower front side. Flowing into.

  Further, a water distribution pipe 24 for discharging water in the water tank 8 is connected to the bottom surface 8 </ b> A of the water tank 8 through a discharge valve 25. In addition, a drain pipe 36 is connected to the inner bottom portion of the drain pan 26, and all of the water flowing down into the drain pan 26 is discharged from the drain pipe 36 to the outside. The ice making machine has a built-in control means (not shown) constituted by a general-purpose microcomputer or the like, and the control means opens / closes the water tray 4, operates the cooling device, and opens / closes each valve device. Control is performed.

  Next, the operation of the reverse cell type ice making machine according to the present embodiment will be described. First, an ice making process for generating ice in each ice making chamber 2 will be described. First, when the power is turned on (ON) by the control means, the water tray 4 is initialized to the horizontal closing position. Then, the water supply electromagnetic valve 12 is opened, and water is supplied from the sprinkler 13 into the water tank 8. The water supply into the water tank 8 is continued until it is detected by a water level sensor (not shown) that the water tank 8 is full.

  When the water in the water tank 8 is full, the water supply electromagnetic valve 12 is closed, whereby the water supply to the water tank 8 is stopped. Further, simultaneously with the opening of the water supply electromagnetic valve 12, the operation of the circulation pump 10 and the cooling device is started. By starting the operation of the circulation pump 10, the water in the water tank 8 is circulated from the fountain hole 6 into each ice making chamber 2 through the water conduit 11 and the distribution pipe 5. Further, when the cooling device is activated, the refrigerant flows into the evaporation pipe and absorbs heat from the cooler 1. Thereby, the 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 water ejected from the fountain hole 6, the remaining water that does not become ice is collected from the return hole 7 into the water tank 8.

  And the production | generation of the ice in each ice-making room 2 can be judged by detecting the water temperature of the water tank 8, for example. Specifically, a water temperature sensor or the like connected to the input side of the control means is provided in the water tank, and the water temperature in the water tank 8 detected by the sensor falls below a predetermined temperature (for example, + 3 ° C.). When the temperature is kept below that temperature for a predetermined time, the control means determines that ice has been generated in each ice making chamber 2.

  As described above, when it is determined that ice is generated in each ice making chamber 2, the process proceeds to the ice removal step. When entering the ice removal stroke, first, the reduction motor 16 is rotated forward. As a result, the first arm 17 rotates counterclockwise, and the water pan gradually tilts downward. When the water pan 4 reaches the tilt opening position, the second arm 18 extending in the opposite direction to the first arm 17 contacts the water pan position detection switch 20, the contact of the switching lever is switched, and the contact is It is closed and reversed to the backward movement side, and the rotation of the reduction motor 16 is stopped. Thereby, the water tray 4 stops.

  Further, when the water tray 4 reaches 15 seconds before reaching the inclined open position, the water supply electromagnetic valve 12 is opened. Thereby, the water sprinkled from the water sprinkler 13 onto the upper surface of the water tray 4 and the ice adhering to the upper surface of the water tray 4 is washed away. Then, the washing water that has washed away the water dish 4 falls into the water tank 8. A part of the water in the water tank 8 is discharged from the drain port 23 when the water tray 4 is opened. That is, it flows on the drain pan 26 from the drain outlet 23 through the drain guide plate 9.

  Since the water tank 8 of the present invention has a structure in which water remains in the inclined open position where the water tray 4 opens the ice making chamber 2 of the cooler 1 as described above, the water tray 4 is inclined open. Even when the position reaches the position, all the water in the water tank 8 does not go out from the drain port 23, and at least a part of the water remains in the water tank 8. Specifically, in the water tank 8 of the present embodiment, at least part of the water in the water tank 8 is blocked by the upright portion 8B formed at the tip of the bottom surface 8A and does not flow out from the drain port 23. In addition, it remains inside (FIG. 2).

  On the other hand, when the process proceeds to the above-described ice removal step, a hot gas solenoid valve (not shown) is opened, and hot gas (high-temperature and high-pressure refrigerant gas) flows directly into the evaporation pipe 3 from a compressor (not shown) of the cooling device. As a result, the surface of the ice is heated and falls from the ice making chamber 2 onto the water tray 4, and further falls from the front of the water tray 4 to the ice storage section and is stored in the ice storage section.

  At this time, it is determined whether or not the deicing is completed based on whether or not the temperature detected by the cooler temperature sensor 21 provided on the side surface of the cooler 1 exceeds a preset deicing completion temperature. When the deicing is completed, the hot gas solenoid valve is closed and the speed reduction motor 16 is reversed. As a result, the first arm 17 rotates clockwise, and the water tray 4 gradually moves upward. When the water pan 4 reaches the horizontal closing position, the first arm 17 comes into contact with the water pan position detection switch 20, the switching lever is switched, the contact is opened, and the switch is inverted to the tilt side. The rotation of the reduction motor 16 is stopped. Thereby, the water tray 4 stops.

  In that state, the process proceeds to the ice making process again. That is, the water supply electromagnetic valve 12 is opened, and water is supplied from the sprinkler 13 into the water tank 8. At this time, since the water used in the previous ice making process and the deicing process that remains without being discharged as described above remains in the water tank 8, the remaining water is transferred into the water tank 8. The amount of water supply can be reduced.

  Meanwhile, as shown in FIG. 7, the conventional ice making machine is configured such that all the water in the water tank 108 is discharged at the inclined open position. That is, since the water tank 108 has a drain outlet 123 formed on the horizontal extension of the bottom surface 108A in the inclined open position, the water tank 4 must be in the water tank 108 whenever the water dish 4 moves to the inclined open position. All the water was discharged from the water tank 108. In this way, in the conventional ice making machine, every time the water tray 4 moves to the inclined open position, all the water in the water tank 108 is discharged, so the amount of discharged water is more than half of the supplied water. Until then, the amount of water consumption increased. As a result, there has been a problem that the running cost is remarkably increased. Thus, there has been a long-felt need to reduce the amount of water consumed in the ice making machine.

  Therefore, as shown in FIG. 8, an upright portion 108B is provided at the front end portion of the bottom surface 108A in the horizontal direction, and the water tray 4 is in an inclined open position where the ice making chamber 2 of the cooler 1 is opened. Although the amount of drainage can be reduced by adopting the remaining structure, the water remaining in the water tank 108 is the above-mentioned ice-making residual water or the washing water for the water tray 4, and the ice-making residual water includes tap water. Impurities such as chalk and minerals contained in the water remain after being concentrated, and the above-mentioned impurities are likely to remain in the washing water of the water dish 4 in addition to ice scum for detaching the ice. If it continues, the impurity concentration contained in the said water will exceed a saturation concentration, and the problem which a scale precipitates will arise. In this case, even when the structure shown in FIG. 8 is applied and water is always left in the water tank 108 (that is, when some water is not drained every time), as shown in FIG. During the ice making operation, the impurity concentration in the water tank 108 has reached a saturation concentration, causing a disadvantage that the scale is deposited. When the scale is deposited in this manner, for example, the scale is deposited between the ice making chamber 2 and the water tray 4, the water tray 4 cannot close the ice making chamber 2, and the water tray 4 and the ice making chamber 2 are slightly separated from each other. Ice making will be carried out in the state. That is, the water ejected from the fountain hole 6 into each ice making chamber 2 flows also into the gap between the water tray 4 and the ice making chamber 2, and ice is generated in the gap. The adhesion force becomes strong, and when the water tray 4 is tilted during the ice removing process, the water tray 4 is difficult to separate from the ice, and an excessive load is applied to the water tray 4 and the driving device 15 that moves the water tray 4.

  Furthermore, the fountain hole 6 of the water tray 4 is closed by the scale, and various problems occur, such as obstructing the ejection of water into the ice making chamber 2 or hindering the operation of the circulation pump 10. .

  Therefore, in the present invention, when the drain pipe 24 is connected to the bottom surface 8A of the water tank 8 via the drain valve 25 and the ice making operation is repeated a predetermined number of times, the drain valve 25 is opened and all the water in the water tank 8 is discharged. It shall be discharged from the water distribution pipe 24. Specifically, the number of times of ice making and the impurity concentration when water is left in the water tank 8 in advance are measured, and when the ice making process is performed a predetermined number of times before the impurity concentration reaches the saturation concentration, the drain valve 25 is turned on. It is opened and all residual water in the water tank 8 is discharged (FIG. 3).

  In this way, the water tank 8 has a structure in which water remains in the inclined open position where the water tray 4 opens the ice making chamber 2 of the cooler 1, and the remaining water is kept until the ice making process is executed a predetermined number of times. When ice making is performed by reuse, and the ice making process reaches a predetermined number of times as described above (that is, every several cycles), the drain valve 25 is opened and all the water in the water tank 8 is discharged. As shown in FIG. 4, the water in the water tank 8 can be reliably kept below the saturation concentration of impurities. This makes it possible to significantly reduce the amount of water consumed while effectively eliminating the inconvenience of scale deposition from water. Therefore, the running cost of the ice making machine can be effectively reduced.

  In the above embodiment, when the ice making process is executed a predetermined number of times set in advance, the drain valve 25 is opened and all the water in the water tank 8 is discharged. For example, as shown in FIG. The water quality sensor 27 may be provided in the water 8 and when the impurity concentration in the water tank 8 detected by the water quality sensor 27 reaches a predetermined upper limit value, the drain valve 25 may be opened. 5 except that the water quality sensor 27 described above in FIG. 5 is provided and the drain valve 25 is opened based on the impurity concentration in the water tank 8 detected by the water quality sensor 27. Since they are similar, detailed description of the structure and operation is omitted.

  Also in the present embodiment, it is possible to significantly reduce the amount of water consumed while effectively eliminating the inconvenience of scale deposition from water as in the first embodiment. Thereby, the running cost of the ice making machine can be effectively reduced. Further, in the present embodiment, the water quality sensor 27 can accurately grasp the impurity concentration in the water tank 8, and the drain valve 25 can be opened accurately according to the degree of contamination of the water to allow drainage. . Thereby, it becomes possible to suppress the amount of water consumption as much as possible, and a more efficient ice making operation can be realized.

  Next, another embodiment of the reverse cell type ice making machine of the present invention will be described. FIG. 6 shows a sectional view of the reverse cell type ice making machine of this embodiment. The reverse cell type ice making machine of the present embodiment shown in FIG. 6 is common in many respects to the above-described first embodiment, so that the same or similar operation as the reverse cell type ice making machine of the first embodiment, or Detailed description of the configuration that provides the effect is omitted.

  In FIG. 6, reference numeral 30 denotes a drain receiving portion for receiving drainage from the water tank 8. The drain receiving part 30 is for receiving a part of the water discharged from the water tank 8 and storing it in the inclined open position where the water tray 4 opens the ice making chamber 2 of the cooler 1. In this embodiment, the drain pan 26 installed immediately below the water tank 8 is a space 26A on the side (left end in FIG. 6) on which the drain plate 4 is pivotally supported by the support beam 22 via the rotating shaft 14 by the partition plate 31. And a space 26 </ b> B on the opposite side (right end in FIG. 6), and the space 26 </ b> B serves as a drainage receiving portion 30.

  Further, the water tank 8 of the present embodiment is not structured such that water remains inside as in the first embodiment. That is, the water tank 8 of the present embodiment has a structure similar to that of the conventional water tank 108 shown in FIG. 7 in which the drain port 23 is formed on the horizontal extension of the bottom surface 8A at the inclined open position. .

  A hole 35 penetrating the drainage guide plate 9 in the axial direction is provided at a position corresponding to a position directly above the drainage receiving portion 30 of the drainage guide plate 9 that guides water from the drainage port 23 to the space 26A of the drain pan 26. A part of the drainage that is formed and discharged from the water tank 8 through the hole 35 and flows toward the space 26 </ b> A of the drain pan 26 flows down into the drainage receiving unit 30.

  In the ice making machine of the present embodiment, most of the water from the water sprinkler 13 sprayed on the upper surface of the water tray 4 and the ice adhering to the water tray 4 flowing by the water spray is in the water tank 8 in the ice removing process. It is comprised so that it may flow in the said waste-water receptacle part 30 from the front-end | tip part of the water tray 4 without flowing. That is, in the drainage guide plate 9 of the first and second embodiments, a space is formed on the front surface of the tip of the water dish 4, and the water that reaches the front end flows through the upper surface of the water dish 4 from the space. The front end of the water dish 4 was attached so as to flow down into the water tank 8, but in this embodiment, the front surface of the front end of the water dish 4 of the drainage guide plate 9 is in close contact with the front end of the water dish 4. Since the water (watering) supplied to the upper surface of the water dish 4 flows down into the water tank 6 partially from the return hole 7 provided in the water dish 4 in the ice removal process. Most of the washing water reaches the tip of the water dish 4, flows down along the front surface of the drainage guide plate 9 (the surface opposite to the water tank 6), and flows down to the drainage receiving unit 30 located at the lower part. For this reason, a large amount of water flows in the drain receiving part 30 in one ice making process and ice removing process.

  The partition plate 31 is lower in height than the outer peripheral wall of the drain pan 26, and when the space 26B in the drain receiving part 30 is full of water, the water in the drain receiving part 30 exceeds the partition plate 31. The drain pan 26 is configured to be able to flow into the space 26 </ b> A side. Therefore, as described above, even if a large amount of water flows down into the drain receiving part 30 and becomes full, the overflowed water flows over the partition plate 31 to the space 26A side of the drain pan 26. The water can be discharged from a drain pipe 36 provided in the space 26A.

  On the other hand, one end of a water conduit 32 is connected to the bottom surface of the drain receiving portion 30, and the water conduit 32 extends upward from one end connected to the bottom surface of the drain receiving portion 30 and passes through the upper part of the ice making chamber 2. The other end is connected to the sprinkler 13. A water supply pipe 33 for supplying water into the water tank 8 is connected via the water supply electromagnetic valve 12 in the vicinity of the other end connected to the sprinkler 13.

  Further, a pump 38 is interposed in the middle of the water conduit 32 to suck up the water stored in the drainage receiving portion 30 and push it away to the sprinkler 13. Thereby, the reverse cell type ice making machine of the present embodiment can suck up the water received by the drain receiving part 30 and supply it to the sprinkler 13 by operating the pump 38.

  Next, the operation of the reverse cell type ice making machine of the present embodiment having the above structure will be described. The operation of the reverse cell type ice making machine of the present embodiment is common to the operation of the first embodiment described above in many respects, and here, the description will focus on the differences from the first embodiment. When the power is turned on (ON) as in the first embodiment, the water tray 4 is initialized to the horizontal closing position. Then, the water supply electromagnetic valve 12 is opened, water is supplied from the water sprinkler 13 into the water tank 8 through the water supply pipe 33 and the water guide pipe 32, and when the water supply is full, the water supply electromagnetic valve 12 is closed. Thereby, the water supply to the water tank 8 stops. Further, simultaneously with the opening of the water supply electromagnetic valve 12, the operation of the circulation pump 10 and the cooling device is started. By starting the operation of the circulation pump 10, the water in the water tank 8 is circulated from the fountain hole 6 into each ice making chamber 2 through the water conduit 11 and the distribution pipe 5. Further, when the cooling device is activated, the refrigerant flows into the evaporation pipe and absorbs heat from the cooler 1. Thereby, the water supplied to each ice making chamber 2 of the cooler 1 is cooled, and ice is gradually generated. Of the water ejected from the fountain hole 6, the remaining water that does not become ice is collected in the water tank 8 from the return hole 7.

  And if ice is produced | generated in each ice making chamber 2, it will transfer to an ice removal process next and the reduction motor 16 will carry out normal rotation. As a result, the first arm 17 rotates counterclockwise, and the water pan gradually tilts downward. When the water pan 4 reaches the tilt open position, the second arm 18 extending in the direction opposite to the first arm 17 contacts the water pan position detection switch 20, the switching lever is switched, and the contact is It is closed and reversed to the backward movement side, and the rotation of the reduction motor 16 is stopped. Thereby, the water tray 4 stops.

  Further, when the water tray 4 reaches 15 seconds before reaching the inclined open position, the operation of the pump 38 is started. Thereby, the water in the drainage receiving part 30 is sucked into the water conduit 32 from one end, reaches the water sprinkler 13 connected to the other end of the water conduit 32 via the pump 38, and the water tray 4 from the water sprinkler 13. Water is sprinkled on the top surface of. Thereby, the ice adhering to the upper surface of the water tray 4 is washed with the water. Then, most of the washing water that has washed away the water dish 4 flows into the drain receiving part 30 from the tip of the water dish 4. Further, all of the water stored in the water tank 8 flows into the drainage receiving portion 30 from the space 26 </ b> A of the drain pan 26 or the hole 35 through the drainage outlet 23 drainage guide plate 9.

  At this time, since a large amount of water flows in the drainage receiving part 30, the drainage receiving part 30 becomes full. The water overflowing from the drainage receiver 30 passes through the partition plate 31 and flows into the space 26 </ b> A of the drain pan 26. Thus, a large amount of water flows in the drainage receiving portion 30, and the overflowed water flows into the space 26A and is discharged. For this reason, in the drain receiving part 30, water that is close to the tap water that flows in when the water supply electromagnetic valve 13 is opened, that is, water with a low impurity concentration remains. Therefore, scale deposition from the water hardly occurs.

  On the other hand, when the process proceeds to the above-described ice removal step, a hot gas solenoid valve (not shown) is opened, and hot gas (high-temperature and high-pressure refrigerant gas) flows directly into the evaporation pipe 3 from the compressor of the cooling device. As a result, the surface of the ice is heated and falls from the ice making chamber 2 onto the water tray 4, and further falls to the ice storage section located in the lower front of the water dish 4 and stored in the ice storage section.

  When the deicing is completed, the hot gas solenoid valve is closed and the speed reduction motor 16 is reversed. Thereby, the 1st arm 17 rotates clockwise, and the water tray 4 is gradually moved back upwards. When the water pan 4 reaches the horizontal closing position, the first arm 17 comes into contact with the water pan position detection switch 20, the switching lever is switched, the contact is opened, and the switch is inverted to the tilt side. The rotation of the reduction motor 16 is stopped. Thereby, the water tray 4 stops.

  In that state, the process proceeds to the ice making process again. That is, the above-described operation in which the water supply electromagnetic valve 12 is opened and water is supplied from the sprinkler 13 into the water tank 8 through the water supply pipe 33 and the water guide pipe 32 is repeated.

  As described above, in this embodiment, a part of the water discharged from the water tank 8 can be stored in the drain receiving part 30 and can be reused when the water is sprayed in the deicing process. Thereby, the water at the time of watering to the water tray 4 of an ice removal process can be water-saving. In particular, since the water stored in the drainage receiving part 30 is mostly washing water for dropping ice in the water tray 4 after ice making, the concentration of impurities such as chalk and minerals is lower than the ice making residual water. Since a large amount of water flows in the drainage receiving portion 30 and the overflowed water flows into the space 26A of the drain pan 26 and is discharged, the inconvenience of scale depositing from the water can be eliminated. This makes it possible to significantly reduce the amount of water consumed while effectively eliminating the inconvenience of scale deposition from water.

It is a partially cutaway side view of the reverse cell type ice making machine of one Example of this invention. It is sectional drawing which shows the state in which water remained in the water tank of the reverse cell type ice making machine of a present Example. It is sectional drawing which shows the state from which the water in the water tank of the reverse cell type ice making machine of FIG. 2 was discharged | emitted. It is a figure which shows the impurity concentration in a water tank, and the frequency | count of ice making. It is sectional drawing of the reverse cell type ice making machine of the other Example of this invention. It is sectional drawing of the reverse cell type ice making machine of another another Example of this invention. It is sectional drawing of the conventional reverse cell type ice making machine. It is sectional drawing of another conventional reverse cell type ice making machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooler 2 Ice making room 3 Evaporating pipe 4 Water tray 5 Minute piping 6 Fountain hole 7 Return hole 8 Water tank 8A Bottom surface 8B Standing part 9 Drainage guide plate 10 Circulation pump 11 Water guide pipe 12 Water supply solenoid valve 13 Sprinkler 14 Rotating shaft 15 Drive device 16 Deceleration motor 17 First arm 18 Second arm 19 Coil spring 20 Dish position detection switch 21 Cooler temperature sensor 22 Support beam 23 Drain outlet 24 Drain pipe 25 Drain valve 26 Drain pan 26A, 26B Space 27 Water quality sensor 30 Drainage receiving part 31 Partition plate 32 Water guide pipe 33 Water supply pipe 35 Hole 38 Pump

Claims (4)

A cooler having a large number of ice making chambers opened downward, and arranged to be tiltable so as to close the cooler from below at a horizontally closed position, and provided with a fountain hole at a position facing each ice making chamber A water tank, a water tank that is provided integrally with the water dish and 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 A reverse cell type ice maker equipped with a sprinkler for spraying water on the upper surface of a water dish,
The water tank has a structure in which water remains in an inclined open position where the water dish opens the ice making chamber of the cooler, and includes a drain valve for discharging water in the water tank. A reverse cell type ice making machine.   The reverse cell type ice making machine according to claim 1, wherein the drain valve is opened when the ice making process is executed a predetermined number of times.   The water tank is provided in the water tank, and the drain valve is opened when the impurity concentration of the water in the water tank detected by the water quality sensor reaches a predetermined upper limit value. The reverse cell type ice making machine described. A cooler having a large number of ice making chambers opened downward, and arranged to be tiltable so as to close the cooler from below at a horizontally closed position, and provided with a fountain hole at a position facing each ice making chamber. A water tank, a water tank that is provided integrally with the water dish and 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; A reverse cell type ice maker equipped with a sprinkler for spraying water on the upper surface of a water dish,
A drainage receiving portion for receiving water discharged from the water tank is provided at an inclined open position where the water tray opens the ice making chamber of the cooler, and water received at the drainage receiving portion is supplied to the water sprinkler. A reverse cell type ice maker characterized by being configured as described above.

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