JP2006017400A - Cell type ice maker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cell type ice maker capable of carrying out reliable draining of ice making water or washing water from a water tank while preventing draining splash into an ice making chamber. <P>SOLUTION: An ice making unit consists of an ice making case 10, a water supply tray 11, the water tank 12, and a drain pan 13. The water tank 12 is formed in a dished vessel open upward with a bottom wall 38 and first-fourth peripheral walls 39-42 erected from the peripheral edge thereof. The third peripheral wall 41 has a drain port 44 opened for draining residing water and a drain gutter 45 provided on the outer face thereof. Inside the water tank 12, a water conducting wall 46 is formed downsloping from the side of the fourth peripheral wall 42 toward the drain port 44. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cell-type ice making machine that cools the peripheral wall of a cell that opens downward with a refrigerant and generates ice cubes while spraying ice-making water toward the cell, to a drainage structure from a water tank to a drain pan. It is an improvement.

  A cell-type ice making machine is known, for example, from Patent Document 1. There, a tank bottom wall of the water tank is constituted by a pair of inclined walls inclined in a V shape. The tank bottom wall is composed of a first bottom wall on the inclined base end side having a large inclination angle and a second bottom wall on the inclined distal end side having a gentle inclination angle. Part of the ice making water remains in the inner corner of the bottom wall to prevent the pump from slipping. The front end of the second bottom wall is a drain outlet, and a drainage channel is formed on the lower surface side of the second bottom wall with a wall that goes around to the lower surface side of the second bottom wall.

  The ice making water remaining at the bottom of the water tank at the end of ice making contains a lot of impurities and causes ice turbidity, so it is discharged out of the machine through a drain pan provided below the water tank. At the same time, the washing water for washing away the debris adhering to the upper surface of the water supply tray is also discharged outside the apparatus through the drain pan together with the previous ice making water. When discharging ice making water, washing water, etc., if the wastewater splashes into the ice making room, it adheres to the ice cubes stored in the ice making room and melts some of them, or is cooled by ice cubes and the adjacent ice pieces are separated. I will be bound. In order to prevent such melting of ice cubes and adhesion of ice cubes due to scattered drainage, the ice making machine disclosed in Patent Document 1 has a chevron-shaped protrusion or inclined surface that catches waste water or overflow water on the bottom wall of the drain pan. It is provided to prevent water from splashing in the drain pan.

  In the present invention, ice making water and washing water remaining in the water tank are drained from a drain opening opened in the peripheral side wall of the water tank. This type of drainage structure is recognized in Patent Document 2. There, a partition wall constituting a weir is provided in front of the tilting tip wall of the water dish, a drainage channel is defined between the tilting tip wall and the partition wall, and the bottom wall is inclined downward toward one peripheral side wall. The surplus water can be discharged to the drainage tank from the drainage opening opened at the lower end of the slope. In this ice making machine, ice making water is stored in a horizontally supported water dish, and ice is grown around ice making protrusions immersed in ice making water. The ice making form is different from the cell type (dynamic water ice making type) ice making machine that makes ice while spraying to the cell.

JP 2000-193348 A (paragraph number 0017, FIG. 1) Japanese Utility Model Publication No. 10-238914 (paragraph number 0013, FIG. 1)

  In a cell-type ice making machine, it is required to shorten the ice-breaking cycle time while preventing wastewater from scattering, but it is difficult to satisfy both. In the cell type ice making machine, the water tank is drained while tilting downward at a constant speed, so the ice making water remaining in the tank begins to flow down and at the same time, most of the ice making water flows down toward the inclined tip wall. To do. For this reason, drainage with a strong flow tends to jump out of the inclined tip wall, and the structure for preventing the scattering of drainage becomes complicated and wins. If the tilting speed of the water tank is slowed down, it is possible to prevent the amount of waste water from increasing rapidly, but it is inevitable that the deicing cycle time will be prolonged. In Patent Document 1, a splash prevention structure such as a mountain-shaped protrusion or an inclined surface is added to the drain pan, but there is a disadvantage that the cost is increased accordingly.

  According to the drainage structure of Patent Document 2, since the partition wall is provided near the inclined lower end of the water dish and the drainage channel is partitioned between the tilting tip wall and the partition wall, when the water dish is tilted downward, The partition wall can prevent the waste water flowing down along the second bottom wall from directly colliding with the tilting tip wall. However, with the still water ice making method, ice making water is stored in a horizontally supported water tray to make ice, so every time the excess ice making water in the water tray is completely discharged, the water tray is moved from a horizontal posture to a vertical posture. It is necessary to incline downward to a position that exceeds it, and the deicing cycle time is prolonged by the amount of water drainage of the water tray being large. There is also a problem that the effective ice storage amount in the ice making chamber is reduced by the amount of movement space of the water tray in the ice making chamber.

  An object of the present invention is to provide a cell type ice making machine capable of reliably draining ice making water and washing water in a water tank while preventing drainage scattering to an ice making chamber. The purpose of the present invention is to improve the drainage structure of the water tank, so that drainage can be started at a smaller inclination angle, and the amount of drainage is prevented from increasing rapidly as the inclination angle of the water tank increases. An object of the present invention is to provide a cell type ice making machine capable of reliably preventing scattering. An object of the present invention is to provide a cell-type ice making machine that can reliably prevent wastewater scattering by a relatively simple structural change that only improves the structure of a water tank.

  The ice making machine of the present invention includes an ice making case 10 provided with a group of cells 17 opening downward in the ice making chamber 2, and opposed to the lower surface side of the ice making case 10. An ice making unit is provided that includes a water supply tray 11 that ejects water, a water tank 12 that stores ice making water, and a drain pan 13 that receives excess ice making water and washing water discharged from the water tank 12. The water supply tray 11 and the water tank 12 can tilt up and down between an ice making posture in which the water tray 11 faces the lower surface of the ice making case 10 and an ice removing posture in which the water tray 11 is separated from the ice making case 10 and tilts downward. I support you. The water tank 12 includes a bottom wall 38, a first peripheral wall 39 on the tilting tip side standing on the periphery of the bottom wall 38, a second peripheral wall 40 on the tilting base end side, and both first and second peripheral walls 39. -It is the dish-shaped container opened upwards which comprised the 3rd surrounding wall 41 and the 4th surrounding wall 42 which connect 40 integrally. Excess ice-making water in the water tank 12 and washing water at the time of deicing are outside the tank on one of the third peripheral wall 41 and the fourth peripheral wall 42 facing the corner of the bottom wall 38 and the first peripheral wall 39. A drainage port 44 is formed, and a drainage basin 45 is formed on the outer surface of the drainage port 44 so as to be inclined downward toward the tilting proximal end side of the water tank 12. Between the bottom wall 38 and the first peripheral wall 39 of the water tank 12, a water guide wall 46 that is inclined downward toward the drain port 44 is formed.

  The water guide wall 46 can be formed in a tapered shape from the inclined upper end side to the inclined lower end side, and the inclined lower end of the water guide wall 46 can be provided at a position away from the drain port 44 by a predetermined amount. . The drain port 44 can also serve as an overflow hole of the water tank 12.

  In the present invention, the water tank 12 is formed in the shape of a dish-shaped container that opens upward by the bottom wall 38 and the first to fourth peripheral walls 39 to 42 erected on the periphery of the bottom wall 38, and the third A drainage port 44 was opened in either one of the peripheral wall 41 and the fourth peripheral wall 42, and a drainage basin 45 for allowing the drainage to flow down to the drainage pan 13 was formed on the outer surface of the drainage port 44. Further, between the bottom wall 38 and the first peripheral wall 39 of the water tank 12, a water guide wall 46 that is inclined downward toward the drain outlet 44 is formed, and the water tank 12 is tilted downward to retain the remaining water in the tank. When most of the residual water is discharged, the remaining water is forcibly guided to flow toward the drainage port 44 through the water guide wall 46, and the residual water reaching the drainage port 44 is reversely guided by the drainage basin 45 and discharged to the drainage pan 13. Therefore, all the residual water in the water tank 12 can be drained reliably.

  All of the residual water is collected in the drainage port 44 and is reversed and guided by the drainage basin 45 so that the residual water flowing down along the bottom wall 38 of the water tank 12 is drained while weakening. The remaining water in the water tank 12 can be reliably drained while preventing the water from splashing.

  By providing the water guide wall 46 inside the tank, the water level rise in the tank when the water tank 12 tilts can be accelerated by the amount of the water guide wall 46. This means that drainage of residual water in the tank can be started in a state where the tilt angle of the water tank 12 is small. The earlier the drainage start timing, the more residual water when the water tank 12 is further tilted. The amount of can be reduced. As a result, the amount of residual water flowing into the drainage port 44 and the rate of increase in drainage due to the tilting of the tank are reduced, and the fluctuation of the drainage passage amount at the drainage port 44 between the start of drainage and the completion of drainage is reduced. Thus, the residual water in the tank can be discharged more gently. Accordingly, the residual water can be surely drained while reliably preventing the water from splashing into the ice making chamber 2, so that even if the tilting speed of the water tank 12 is increased, there is no problem without water scattering. It can drain without any problem and can contribute to shortening the de-icing cycle time. Since a relatively simple structural change by simply adding the water guide wall 46 to the inside of the water tank 12 can prevent the wastewater scattering, the cost required for the drainage scattering prevention structure can be minimized.

  When the water guide wall 46 is formed in a conical shape from the inclined upper end side toward the inclined lower end side, the rate of increase of the water level in the tank when the water tank 12 tilts becomes gradual. When the tilting angle of 12 increases, it is possible to prevent the residual water from concentrating on the drain port 44 and to prevent the water from scattering around the drain port 44.

  If the inclined lower end of the water guide wall 46 is provided at a position away from the drain port 44 by a predetermined amount, the region of residual water that is forcibly guided by the water guide wall 46 can be separated from the drain port 44 to some extent, It is possible to alleviate the concentration of residual water toward the drain outlet 44 by that amount. Thereby, when the residual water in a tank begins to flow down from the drain outlet 44, it can suppress that the amount of drainage water increases rapidly, and can prevent water scattering more reliably.

  If the drain port 44 also serves as the overflow hole of the water tank 12, it is not necessary to separately provide an overflow pipe or the like, so that the structure of the water tank 12 can be simplified correspondingly and the cost of the ice making unit can be reduced.

(Embodiment) FIGS. 1 to 9 show an embodiment of a cell type ice making machine according to the present invention. In FIG. 2, the ice making machine has a vertically long box-shaped main body case 1, and the main body case 1 surrounded by a heat insulating wall is divided into an upper ice making chamber 2 occupying most of the main body case 1 and a machine room 3 below the case. Thus, the front opening of the ice making chamber 2 can be opened and closed with an upper opening door not shown. The machine room 3 contains refrigeration equipment such as a compressor 5 and a condenser 6. The inside of the ice making chamber 2 is divided into upper and lower portions by a drain pan 13 fixedly arranged in the ice making chamber 2, an ice making unit is placed in the upper compartment, and ice cubes generated by the ice making unit are stored in the lower compartment. The

  3 and 4, the ice making unit is configured with a unit base 9 fixed near the upper end of the ice making chamber 2 as a basic structure, and an ice making case 10 fixed to the lower surface of the unit base 9 and an ice making case 10. The water supply tray 11 which is disposed opposite to the lower surface side of the water and supplies ice-making water to each cell 17, the water tank 12 for storing ice-making water, surplus ice-making water, washing water at the time of deicing, etc. A drain pan 13, a pump 14 that pressurizes and feeds ice making water in the water tank 12 to the water supply tray 11, a posture switching mechanism that tilts the water supply tray 11 and the water tank 12 up and down, and ice water in the water tank 12. Or a water supply pipe 15 for supplying deicing water.

  In FIG. 3, the ice making case 10 is formed of a square dish-like container that opens downward, and a group of cells 17 that open downward are defined in the inside thereof. Each cell 17 is configured by assembling metal plate materials in a lattice shape. A refrigerant pipe 18 for cooling the ice making case 10 to below the freezing point is disposed in close contact with the upper surface of the ice making case 10. In the deicing process, hot gas is supplied to the refrigerant pipe 17 to heat the ice making case 10 and promote separation of the cell 17 and the ice cube.

  The water supply tray 11 includes a tray main body 20 that opens downward, and a water channel frame 21 that is bonded and fixed to the inner surface of the upper wall of the tray main body 20 and forms a water flow path R in cooperation with the tray main body 20. The water tank 12 is integrally fastened and fixed to the lower surface of the tray main body 20. In the state in which both are integrated, cleaning water is supplied between the first peripheral wall 39 of the water tank 12 and the tray main body 20 described later. A gap E for dropping into the tank 12 is secured (see FIGS. 3 and 7).

  In FIG. 7, on the upper wall of the tray main body 20, a nozzle hole 22 that supplies ice-making water into the cell 17, a pair of return holes 23 that are opposed to each other with the nozzle hole 22 interposed therebetween, and an opening periphery of the nozzle hole 22 And a drain recess 24 that connects the lower end of the return hole 23 and the lower end thereof in a downwardly inclined manner. The nozzle hole 22 communicates with the water channel R defined by the water channel frame 21, and the return hole 23 is formed in a penetrating manner in an outer portion of the water channel frame 21. The drainage recess 24 is provided to prevent ice cubes from becoming clouded by reliably flowing ice-making water that has collided with ice blocks and did not freeze until the ice-making process is completed into the return hole 23.

  3 and 5, a swing arm 25 made of a press fitting is fixed to the side end of the tray body 20, and the upper end of the swing arm 25 is pivotally supported by the unit base 9 via a pair of pins 26. Thus, the water supply tray 11 and the water tank 12 can be oscillated and displaced between the ice making posture and the ice removing posture.

  There is a posture switching mechanism for switching the water supply tray 11 and the water tank 12 between an ice making posture and a deicing posture. In FIG. 5 and FIG. 6, the posture switching mechanism includes a motor 30 and a speed reducer 31 fixed to the unit base 9 in a state of facing the swinging tip of the water supply tray 11, and a pair of drives fixed to the output shaft of the speed reducer 31. The arm 32, a pair of spring receiving pins 33 fixed to the water supply tray 11, and a pair of tension coil springs 34 that are latched between the drive arms 32.

  When the tip of the drive arm 32 is at the 12 o'clock position as shown in FIG. 2 with respect to the timepiece dial, the water supply tray 11 and the water tank 12 are maintained in the ice making posture. When the drive arm 32 rotates counterclockwise from the ice making posture and the tip of the drive arm 32 reaches a position of approximately 7 o'clock as shown in FIG. 5, the water supply tray 11 and the water tank 12 have their own weight around the pin 26. Swing down and switch to the deicing position. From this state, when the drive arm 32 is rotated to the 12 o'clock position, the water supply tray 11 and the water tank 12 are raised and swung around the pin 26 to return to the ice making posture.

  The water supply pipe 15 is disposed above the water supply tray 11 in a space between the ice making case 10 and the swing arm 25, and water supply ports are opened at regular intervals on the pipe wall. The water supply pipe 15 is connected to the water supply via a solenoid valve 35 (see FIG. 3) and a water pipe. By opening and closing the electromagnetic valve 35, ice making water can be supplied toward the upper wall of the tray body 20, or cleaning water for deicing can be supplied.

  1 and 3, the water tank 12 includes a bottom wall 38, a first peripheral wall 39 on the tilting tip side standing on the periphery of the bottom wall 38, a second peripheral wall 40 on the tilting base end side, It consists of a square dish-shaped plastic molded product that is open upward and integrally includes a third peripheral wall 41 and a fourth peripheral wall 42 that connect the second peripheral walls 39 and 40.

  A recess 27 is formed in the lower corner of the water tank 12 on the tilting proximal end side, and the pump 14 is disposed in the recess 27. As shown in FIG. 3, the pump 14 is attached to a bracket 28 fixed to the lower surface of the swing arm 25, the suction port 14 a communicates with the deepest part of the water tank 12, and the discharge port 14 b is connected to the water supply tray 11. To the water channel R.

  The third peripheral wall 41 facing the corner of the bottom wall 38 and the first peripheral wall 39 is used to discharge the excess ice-making water remaining in the tank when the ice making process is completed and the washing water at the time of deicing to the outside of the tank. The drainage port 44 was opened, and a drainage basin 45 was formed on the outer surface of the drainage port 44. Further, between the bottom wall 38 and the first peripheral wall 39, a water guide wall 46 that is inclined downward toward the drain port 44 is formed. The volume of the water tank 12 is reduced by the amount of the provision of the concave portion 27. In order to compensate for this decrease in volume, an additional tank portion 47 communicating with the inside of the tank is bulged on the outer surface of the third peripheral wall 41. . The water tank 12 is mounted in a state where the drainage tank 45 and the additional tank 47 face the inner back wall of the ice making chamber 2.

  As shown in FIG. 3, the bottom wall 38 of the water tank 12 includes a first bottom wall 51 on the inclined base end side having a large inclination angle, and a second second wall on the inclined distal end side having a gentle inclination angle that occupies most of the bottom wall 38. And the bottom wall 52. The previous drain port 44 opens in a trapezoidal shape at the front portion of the first peripheral wall 39 facing the tilting tip of the second bottom wall 52. The drainage basin 45 includes a basin wall 53 inclined downward in the same direction as the second bottom wall 52, and a basin wall 54 surrounding the periphery of the basin wall 53 in cooperation with the first peripheral wall 39. As shown in FIG. 7, the inclination angle of the bottom wall 53 was set larger than the inclination angle of the second bottom wall 52.

  As shown in FIGS. 1 and 8, the water guide wall 46 is formed in a conical shape, specifically a right triangle shape, from the fourth peripheral wall 42 side toward the drain port 44, and the right apex portion 46a thereof is formed in the first shape. The first peripheral wall 39 and the fourth peripheral wall 42 are positioned at the corners, the second top 46b is positioned at the corner between the second bottom wall 52 and the first peripheral wall 39 and in front of the drain outlet 44, and the third The top 46c is positioned at the corner between the second bottom wall 52 and the fourth peripheral wall 42. As described above, the second top portion 46b is positioned in the vicinity of the drain port 44. When the residual water in the tank begins to flow from the drain port 44, most of the ice making water is concentrated toward the drain port 44. This is to alleviate this and to prevent the amount of drainage water from rapidly increasing.

  The height of each top portion in the water tank 12 is such that the right-angle top portion 46a is at the highest position, and decreases in the order of the second top portion 46b and the third top portion 46c. Thereby, the water conveyance wall 46 inclines downward from the right-angled top part 46a toward the 2nd top part 46b and the 3rd top part 46c. The wall cross section when the water guide wall 46 is cut by a vertical plane parallel to the fourth peripheral wall 42 is inclined downward toward the second bottom wall as shown in FIG. 7, and the inclination angle of this inclined surface is The angle substantially coincides with the inclination angle of the previous bottom wall 53.

  By inclining the water guide wall 46 as described above, when the water tank 12 is in an ice-off position as shown in FIG. 9, the second bottom wall 52 is inclined downward toward the base end of the first peripheral wall 39, Furthermore, the water guiding wall 46 can be inclined downward toward the drain outlet 44, so that all ice-making water in the water tank 12 can be drained reliably. At this time, since the bottom wall 53 of the drainage basin 45 is inclined downward at the same angle as the bottom wall 56 of the drainage pan 13, all of the drainage that has reached the drainage port 44 can be discharged to the drainage pan 13.

  The drain pan 13 is made of a shallow square dish-shaped plastic molded product, and most of the bottom wall 56 is inclined downward toward the drain hole 57 side. As shown in FIG. 8, the drain hole 57 is formed near the inner corner of the drain pan 13, and drains received by the drain pan 13 are discharged out of the machine via a water distribution pipe 58 connected to the lower portion thereof. (See FIG. 2). Since the outline of the water tank 12 in the deicing position is accommodated in the drain pan 13, even if water drops from the water tank 12 or the water supply tray 11, it can be received by the drain pan 13.

  In the ice making process, new ice making water is supplied from the water supply pipe 15 to the upper surface of the water supply tray 11. The ice making water flows down to the water tank 12 through the return hole 23, and a necessary amount is stored in the tank. The drain port 44 also serves as an overflow hole of the water tank 12, and the extra ice making water is discharged from the drain port 44.

  While cooling and feeding the refrigerant to the refrigerant pipe 18 to cool the ice making case 10, the pump 14 is activated and the ice making water in the water tank 12 is pressurized and fed to the water channel R to enter the cell 17 from the nozzle hole 22. Squeeze to produce ice cubes. When ice making is completed, the refrigerant supply to the refrigerant pipe 18 and the water supply by the pump 14 are stopped, and the process proceeds to the ice removal process. At this time, ice-making water containing impurities such as chlorine remains in the water tank 12. The water level is indicated by an imaginary line in FIG.

  In the deicing process, hot gas is supplied to the refrigerant pipe 18 to heat the ice making case 10 and melt the interface between the peripheral wall of the cell 17 and the ice cube, thereby promoting the ice cube separation. After the ice making case 10 has been heated and a predetermined time has elapsed, the motor 30 of the attitude switching mechanism is operated, and the drive arm 32 is rotated and displaced in the counterclockwise direction, so that the water supply tray 11 and the water tank 12 are Switch to a downwardly inclined ice-breaking position. At the same time, the electromagnetic valve 35 (see FIG. 5) is switched to supply deicing cleaning water from the water supply pipe 15 to the upper surface of the water supply tray 11.

  As a result, ice cubes escape from each cell 17, are guided by the upper wall of the water supply tray 11, slide down, and are stored in the ice making chamber 2. Ice debris adhering to the upper wall of the water supply tray 11 is washed away with the wash water supplied from the water supply pipe 15 and flows down into the water tank 12 from the gap E together with the wash water. A part of the washing water falls from the return hole 23 to the water tank 12.

  The water supply tray 11 and the water tank 12 slowly descend and tilt, and eventually switch to the deicing posture. When the water level in the tank reaches the corner between the second bottom wall 52 and the first peripheral wall 39 due to the tilting of the water tank 12, a part of the drainage is received by the water guide wall 46. The water level in the water guide wall 46 at that time is, for example, as shown by an imaginary line in FIG. Assuming that the amount of water remaining in the tank is constant, the rise in the water level in the tank when the water tank 12 is tilted is accelerated by the provision of the water guide wall 46. Therefore, drainage of residual water in the tank can be started in a state where the tilt angle of the water tank 12 is small.

  Thus, when the start timing of drainage is advanced, the amount of residual water when the water tank 12 is further tilted decreases, so that the amount of drainage flowing into the drainage port 44 and the rate of increase in drainage accompanying tilting of the tank are reduced. As a result, the fluctuation range of the drainage passage amount at the drain outlet 44 from the start of drainage to the completion of drainage can be reduced, and the ice-making water and washing water remaining in the tank can be gently discharged.

  The drainage that has passed through the drainage port 44 is reversed and guided by the gutter peripheral wall 54, flows down along the gutter bottom wall 53, and is discharged toward the center in the width direction of the drainage pan 13. Therefore, the drainage discharged from the drainage basin 45 does not collide with the surrounding wall of the drainage pan 13, and as described above, the ice making water and the washing water can be gently discharged, Can be reliably prevented. Thereby, it is possible to reliably prevent the ice cubes stored in the ice making chamber 2 from re-freezing due to water dripped from the water supply tray 11. As described above, the water in the tank that has flowed down along the second bottom wall 52 can be forced to flow down to the side of the drainage port 44 by the water guide wall 44 to completely discharge the wastewater in the tank. It is.

  When the series of ice removing operations is completed, the water supply tray 11 and the water tank 12 are returned to the ice making posture, and the upper wall of the tray main body 20 is opposed to the lower surface of the ice making case 10. Thereafter, ice cubes are continuously generated by alternately performing an ice making process and an ice removing process.

  The water guide wall 46 can be configured as shown in FIG. In FIG. 10 (a), the first water guide wall 61 and the second water guide wall 62 each formed in a triangular shape constitute the water guide wall 46, and the cross-sectional shape of the water guide wall 46 is formed in a square shape.

  Similarly, the water guide wall 46 of FIG. 10B is formed in a cross-sectional shape with two water guide walls 61 and 62, but the triangular base is located on the inclined lower end side of the first water guide wall 61. This is different from the water guide wall 46 in FIG. Also in this case, the entire water guide wall 46 is tapered toward the drain port 44.

  The water guide wall 46 does not need to be a right triangle and may have a tapered shape toward the drain port 44. A line connecting the second vertex 46b and the third vertex 46c may be formed by a partial arc, a curved line, or a broken line. The water guide wall 46 does not need to be formed in a two-dimensional plane, and can be formed in a three-dimensional plane, for example, an upwardly convex wall surface. If necessary, the inclined lower end of the water guide wall 46 can be positioned at the entrance of the drain port 44 or the inclined upper end of the bottom wall 53. The tank increasing part 47 can be omitted. The planar shape of the water tank need not be square.

It is a perspective view of a water tank. It is a vertical front view of an ice making machine. It is a vertical front view of an ice making unit. It is the sectional view on the AA line in FIG. It is a front view of the state which switched the water supply tray and the water tank to the de-icing attitude | position. It is a side view which shows an attitude | position switching mechanism. It is a vertical front view which shows the water supply / drainage structure in a water supply tray. It is a cross-sectional plan view of a water tank. It is a longitudinal cross-sectional view which shows the water tank at the time of drainage. It is a schematic perspective view which shows each another Example of a water conveyance wall.

Explanation of symbols

2 Ice making chamber 10 Ice making case 11 Water supply tray 12 Water tank 13 Drain pan 17 Cell 38 Bottom wall 39 First peripheral wall 40 Second peripheral wall 41 Third peripheral wall 42 Fourth peripheral wall 44 Drain outlet 45 Drainage drain 46 Water guide wall

Claims (4)

An ice making case 10 provided with a group of cells 17 opening downward in the ice making chamber 2, and a water supply tray 11 which is disposed opposite to the lower surface side of the ice making case 10 and supplies ice making water to each cell 17. And an ice making unit including a water tank 12 for storing ice making water, and a drain pan 13 for receiving surplus ice making water and washing water discharged from the water tank 12,
The water supply tray 11 and the water tank 12 can be tilted up and down between an ice making posture in which the water tray 11 faces the lower surface of the ice making case 10 and an ice removing posture in which the water tray 11 is separated from the ice making case 10 and tilts downward. Is supported and
The water tank 12 includes a bottom wall 38, a first peripheral wall 39 on the tilting tip side standing on the periphery of the bottom wall 38, a second peripheral wall 40 on the tilting base end side, and both the first and second peripheral walls 39. A dish-like container that opens upward and integrally includes a third peripheral wall 41 and a fourth peripheral wall 42 that connect 40;
Excess ice-making water in the water tank 12 and washing water at the time of deicing are discharged to the outside of the third peripheral wall 41 and the fourth peripheral wall 42 facing the corners of the bottom wall 38 and the first peripheral wall 39. The drain outlet 44 to be opened is open,
On the outer surface of the drainage port 44, a drainage basin 45 that is inclined downward toward the tilting proximal end side of the water tank 12 is formed.
A cell-type ice making machine characterized in that a water guide wall 46 is formed between the bottom wall 38 of the water tank 12 and the first peripheral wall 39 so as to incline downward toward the drain outlet 44.   The cell type ice making machine according to claim 1, wherein the water guide wall (46) is formed in a tapered shape from the inclined upper end side toward the inclined lower end side.   The cell type ice making machine according to claim 1, wherein the inclined lower end of the water guide wall is separated from the drain port by a predetermined amount.   The cell type ice making machine according to claim 1, wherein the drainage port also serves as an overflow hole of the water tank.

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