KR101707636B1 - Vertical ice machine for fast ice making - Google Patents

Abstract

Disclosed is a vertical ice machine comprising: a water tank storing an amount of ice making water, which is less than the amount of ice making water required to perform an ice making operation one time, and repeatedly supplying makeup water from the outside; an ice making plate provided with ice making water to be frozen and allowing ice making water at low temperature, which is not frozen, to drop down into the water tank; and a control part controlling an ice making operation. The control part repeatedly controls supplying of makeup water to the water tank for a predetermined time per predetermined time interval according to whether the temperature of the coolant detected during an ice making operation reaches a specific temperature (-16 C). The supply interval and supply time for makeup water are controlled to allow the upper water level of the water tank after supplying makeup water to be lower than the highest water level of an upper end of the water tank and allow a lower water level before supplying makeup water to be higher than the lowest water level of a bottom side of the water tank. Upon proceeding with the one time-ice making operation, the control part performs a control operation such that the lower water level of makeup water before supplying makeup water and the upper water level of makeup water after supplying makeup water are gradually lowered, thereby gradually reducing the amount of ice making water stored in the water tank during the one time-ice making operation. Moreover, ice making water is not frozen on the ice making plate by reducing an amount of ice making water stored in the water tank, and the temperature of makeup water in the water tank is rapidly lowered by ice making water at a lower temperature, which is recovered into the water tank, to supply the ice making water at low temperature to the ice making plate such that ice making time is reduced, thereby saving ice forming costs and preventing an anomaly in making ice or with the ice making machine.

Description

Technical Field [0001] The present invention relates to a vertical ice-

 [0001] The present invention relates to an ice maker and, more particularly, to an ice maker, and more particularly, to a ice maker that controls the water supply and the number of stages to reduce the level of ice- And the temperature is lowered by the low-temperature deicing water recovered without being frozen to enable quick deicing.

 The ice making machine according to claim 1, wherein the ice making machine comprises a water tank for supplying water from the outside to the icemaker, and water is supplied from the water tank to the ice tray, The technique of deagglomerizing ice by continuously growing the ice in the size of a frozen ice while continuously feeding the frozen ice to the frozen ice is provided.

 The water tank of the vertical type ice maker is formed in such a capacity as to store water less than the amount of water required for one-time ice making operation, and a float switch is installed in the water tank. When the water level falls below a predetermined value, When the upper limit is reached, the vertical type ice maker is downsized by reducing the size of the water storage tank.

 As shown in FIG. 1, a conventional ice-maker is disclosed in Korean Patent No. 10-0764554, which is an ice maker having a plurality of ice- ) Vertically.

 2, a cooling device 102 for cooling the ice making plate by circulating the coolant from the lower side to the upper side of the ice making plate 101 is provided on the rear surface of the ice making plate 101, And a water storage tank (103) for supplying de-icing water to the upper portion of the ice making plate.

 As shown in FIG. 1, an injection pipe 104 is installed at an upper portion of the ice making plate 101 so as to receive de-iced water and spray the ice-making water to the ice-making plate to allow the ice-making water to flow down through the ice- And is ice-growing as shown in Fig. 3 by cooling heat to make ice-making.

 As shown in FIG. 2, the vertical ice-maker of the above-described prior art drops ice-water that has not been converted into ice when the ice surface of the ice-maker 101 flows down, falls into the water storage tank 103 and is recovered. Since the ice making water stored in the water storage tank 103 is lowered due to the decrease in the amount of the ice making water recovered as the ice cubes are changed to ice in the water storage tank 101, the boats 107 to which the opening / closing valve 106 is coupled are installed in the water storage tank, And water such as tap water is supplied from the outside to keep the water level constant.

 The water temperature of the water storage tank 103, which is supplied with ordinary tap water at an atmospheric temperature of 19 ° C, was measured. When the water was started to be ice-cooled for one minute, the water temperature was measured at 2 ° C, The water temperature of the ice making plate 101 is increased and the ice making water supplied from the outside is increased so that the water temperature rises again After 7 minutes, it becomes 1.4 캜.

 According to the water temperature change of the water storage tank 103, the ice is filled in the grid of the ice making plate 101, and as shown in FIG. 3, until the ice is completely frozen to a thickness of about 2 mm on the upper part of the grid mold It takes about 13 minutes and 40 seconds, and there is a problem that the driving time of the ice maker is long.

 In order to de-ice the ice from the ice-making plate, the conventional general technique is to dispose the electrode sensor on the ice when the ice is frozen on the ice-making plate, to detect whether or not the ice- In this case, when the ice contact portion of the electrode sensor is unclear, especially when the pure water is frozen, the current passing amount is insignificant, so that an ice thickness detection error occurs. As a result, the icing operation is continued There arises a problem that ice outside the standard outside the shape of the grid form or ice maker trouble occurs.

 Japanese Patent No. 5198337 discloses an automatic ice maker 10 that is capable of reducing the capacity of the ice making water tank 18 to a level lower than the amount of icing water required for producing ice by one icing operation And supplies water to the ice-making water tank from the outside during the ice-making operation. As shown in Fig. 4 (a), the water is supplied to the ice-making water tank via the float switch 22 installed in the ice- The temperature of the replenishing water is indirectly detected through the temperature measuring device 20, the water supply condition is determined based on the water level and the temperature, the opening time of the water valve 40 is controlled according to the condition, to be. In FIG. 4 (a), reference numeral 12 denotes a ice sheet, 14 denotes an evaporator, 16 denotes a ice tray, 22 denotes a float switch, 24 denotes a control means, 26 denotes an ice guide plate, 28 denotes a deicing water supply pipe, .

 According to another conventional art, when the ice-making water temperature rises by supplying water in the summer and the ice-making water is supplied to the ice-making part, when ice in the ice-making part melts and melted water is recovered to the ice-making water tank, And the ice water level reaches the upper limit in a short time, so that the amount of water to be supplied is substantially reduced, and ice having a small size due to a shortage of water supply is produced.

 In winter, when the supply water becomes cold, the amount of ice melted during icing in the ice making room decreases, and the level of icing water gradually rises, so that the amount of supply water actually supplied becomes larger than that in the case of high temperature supply. As a result, the total amount of water is increased, and huge ice blocks are produced, causing defective ice making and breakage of the ice part.

 In order to solve such a problem, a low temperature mode or a high temperature mode is determined by judging the temperature of the replenishing water based on the ice making temperature and the ice making time, and the replenishment number of the ice making tank is, as shown in FIG. In the ice-making water tank (19), water is supplied at a constant temperature in the low-temperature mode based on the sewage water, and water is supplied at a delay constant higher than the constant in the low-temperature mode water supply based on the ice- In another embodiment, as shown in Fig. 4 (b), when the float switch detects the sewage in the high-temperature mode, the water supply is started on the delayed sewage having a lower water level after the lapse of the second delay time In the low-temperature mode, the float switch detects the upper part of the sewage and then immediately starts supplying the replenished water. When the float switch detects the upper part of the water, The supply of the next supply water is stopped so that the supply quantity is made smaller than the high temperature mode.

 Another conventional technique described above is a technique of supplying a certain amount of the water to be supplied to the ice-making water tank through the time control in the low-temperature mode and increasing the temperature in the high-temperature mode as compared with the low-temperature mode, In the low temperature mode, when the float switch of the ice making water tank detects the sewer water, it feeds the supply water above the constant.

 Therefore, in the conventional vertical ice-maker, all the water is supplied from the outside to the constant water over the sewage of the water tank while the ice-making operation is progressing, so that the temperature of the iced water stored in the water tank is increased by the replenishing water, The temperature of the ice making water supplied to the ice making plate is increased. As a result, the ice making operation time becomes long and the driving amount of the cooling device is increased.

 SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an ice maker which is capable of controlling the water supply and the number of replenishing water supplied from the outside so that the water level of the water storage tank is lowered during the ice- The object of the present invention is to provide a vertical type ice maker for rapid ice making capable of shortening the ice making time to increase the ice making capacity and to produce high quality ice by rapidly reducing the temperature of the makeup water stored in the water tank by ice water.

 In order to achieve the above-mentioned object, the present invention provides a refrigerator comprising: a water storage tank (103) storing a smaller amount of ice-making water than an amount of ice-making water required for one ice-making operation and supplied with replenishing water from the outside during one ice- An ice making plate (101) which is supplied with deicing water and freezes and drops the unfrozen low temperature iced water into a water storage tank; Wherein the control unit controls the supply of supplemental water supplied to the water storage tank at a predetermined interval in accordance with whether or not the refrigerant detected during the ice-making operation reaches a specific temperature (-16 DEG C) The supply interval and time are controlled so that the constant water level of the water storage tank after the replenishing water is supplied is lower than the highest water level of the water storage tank upper end side and the sewage water before the replenish water supply is higher than the bottom water level of the water storage tank, As the operation progresses, the control is performed so that the water level on the sewage water before the replenishment water supply and the water level after the supply is gradually lowered. By the low-temperature deicing water recovered to the water storage tank without icing on the ice storage plate through the reduction of the ice- And the low-temperature deicing water is supplied to the ice making plate. do.

 An open / close valve 106 is provided at an end of the ice-making water inlet pipe of the water storage tank 103 by a bore 107. A solenoid valve 108 is installed at a position spaced apart from the open / , The control unit 109 is mounted with a refrigerant temperature detection sensor 111 for detecting the temperature of the refrigerant at the outlet side of the cooling device circulating and circulating through the cooling device 102 installed in the ice making plate 101, The supply of water to the reservoir is controlled by opening or closing the solenoid valve by applying or interrupting the power to the solenoid valve at a predetermined interval for a predetermined time according to the temperature of the refrigerant detected from the temperature detection sensor.

 The supplemental water to be supplied to the water storage tank 103 is initially replenished (A) from the outside irrespective of the specific temperature of the refrigerant at the start of the ice-making operation and then repeatedly replenished for a certain period of time The supply of the replenishing water is stopped when the temperature reaches a certain temperature, and the deicing is performed after a predetermined time elapses.

 According to the present invention, it is possible to control the water supply and the number of stages so that the water level is decreased while the ice making operation time is elapsed in the replenishing water supplied from the outside to the water storage tank during the ice making operation progress time, The temperature of the replenishing water in the reservoir whose amount is reduced by the amount of the replenishing water in the reservoir is rapidly reduced and supplied to the ice making plate, thereby reducing the ice making time and improving the ice making performance.

 Further, according to the present invention, by detecting the temperature of the refrigerant returned through the circulation of the ice sheet, it is possible to scrape and collect the ice from the ice sheet, so that the ice thickness measurement sensor defects upon de- And ice can be produced with a certain standard.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a conventional vertical ice-maker. FIG.
FIG. 2 is a view conceptually showing the relationship between ice-making water supply in the conventional vertical ice-maker.
FIG. 3 is a drawing showing a part of ice that is ice-melted in a vertical type ice maker. FIG.
FIG. 4 is a diagram showing the water supply relation of the ice-making water tank of another conventional vertical ice maker.
FIG. 5 is a view conceptually showing the supply of ice water to the vertical type ice maker for rapid ice making according to the present invention. FIG.
FIG. 6 is a view showing an embodiment of a replenishing water supplying process of the vertical type ice maker for rapid ice making according to the present invention.
FIG. 7 is a view showing the replenishment water supply interval and the replenishment time in FIG. 6; FIG.

 The present invention will be clarified by the following preferred embodiments, but it should be understood that the present embodiments are merely illustrative examples of the present invention and are not intended to limit the scope of the present invention, Should be understood to include both.

 Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, the same components as those of the prior art are given the same names and codes.

 5, a water storage tank 103 is installed in an inner lower portion of a vertical type ice maker to store de-iced water in an amount smaller than that required for one ice making operation, Wow; An ice making plate (101) which is supplied with deicing water and freezes and drops the unfrozen low temperature iced water into a water storage tank; And a control unit (109) for controlling the ice making operation.

 Wherein the control unit repeatedly controls the supply of the makeup water supplied to the water storage tank at a predetermined interval for a predetermined period of time according to whether or not a specific temperature of the refrigerant detected during the ice making operation reaches a predetermined temperature, Prior to the replenishment water supply, the sewer water level controls the supply interval and time so as to be located above the bottom water level of the reservoir. The specific temperature of the refrigerant is, for example, -16 ° C.

 As the ice making operation is performed one time, the water level on the water before the replenishing water supply and the water after the supply water are gradually lowered so that the ice-making water stored in the water storage tank is gradually decreased during one ice- making operation.

 In this way, the low-temperature deicing water recovered to the water tank without being frozen on the ice sheet rapidly reduces the replenishing water temperature of the water tank due to the decrease in the ice making water stored in the water storage tank, and the ice- .

 Specifically, as shown in FIG. 5, the vertical ice-maker for rapid ice-making according to the present invention includes a ice-making plate 101 having a plurality of grids for receiving ice-making water to form ice, A cooling device 102 installed on the rear surface of the ice making plate 101 for circulating the refrigerant to cool the ice making plate to freeze the ice making water; A water storage tank (103) for storing de-iced water in an inner lower portion of the vertical type ice maker in an amount smaller than that required for one ice making operation and supplying the stored de-iced water to the upper portion of the ice sheet; A spray pipe 104 having a plurality of spray nozzles for spraying the ice-making water supplied from the water storage tank to the ice making plate 101 at an upper portion of the ice-making plate 101; The water injected through the injection pipe flows down through the ice making plate 101 and is formed into ice, so that the icing water which has not been frozen is recovered by the water storage tank.

 That is, in the vertical type ice maker according to the present invention, deicing water such as tap water is supplied from the outside in the water storage tank 103 and supplied to the upper injection pipe 104 on the ice making plate 101 through driving of the water pump 105, The ice-making water flows down through the grid surface of the ice-making plate 101 and is cooled by the cooling heat generated by the driving of the cooling device 102 to form ice corresponding to the ice-making plate grid And ice from the ice sheet is used to be used for ice.

 As shown in FIG. 5, the water storage tank 103 is provided with an opening / closing valve 106, which is opened and closed by a bore 107, at an end portion of the inflow channel into which the makeup water flows from the outside, And a control unit 109 for controlling the icemaking operation such as opening / closing the valve by supplying or disconnecting the operating current to / from the solenoid valve is installed.

 The opening / closing valve 106 closes the ice-making water inflow conduit when the ice-making water flows into the boiler 107 and floats when the ice-maker water is located at the highest water level.

 5, a refrigerant temperature detecting sensor 111 for detecting the temperature of the refrigerant at the outlet of the cooling device, which circulates and circulates through the ice making plate 101, is provided in the cooling device 102 installed in the ice making plate 101 And connects the refrigerant temperature detection sensor 111 to the control unit 109 so that the detected refrigerant temperature signal is sent to the control unit 109.

 The control unit controls the supply of supplementary water to the reservoir through the solenoid valve opening and closing by controlling the power supply to the solenoid valve at predetermined intervals for a predetermined time according to whether the refrigerant detected from the refrigerant temperature detection sensor reaches a specific temperature (-16 ° C) .

 That is, when the ice-making operation is started, the temperature of the refrigerant at the outlet of the ice-making plate, which circulates through the ice-making plate 101 in the cooling device 102 of the ice-making plate 101, The control unit determines whether or not a specific temperature is reached from the refrigerant temperature signal received at a predetermined interval. After a predetermined time has elapsed depending on whether the temperature has been reached or not, the solenoid valve is supplied with power for a predetermined time, To supply the replenishing water.

 In the process of supplying supplemental water to the water storage tank 103, the icing water is initially replenished from the outside (A) irrespective of the specific temperature of the refrigerant when the icemaking operation is started, and then after a predetermined time The additional replenishment is repeatedly performed, and a certain time is elapsed at the time of reaching a specific temperature so that deicing is performed.

 In one embodiment, the replenishing water of the water reservoir which is repeatedly performed is initially replenished (A) at the start of the ice-making operation, and then subjected to a first replenishment (B), a second replenishment (C) → Proceed to the 3rd supplement (D) → 4th supplement (E) → 5th supplement (F) → 6th supplement (G) → 7th supplement (H) → 8th supplement (I).

 6, the control unit 109 operates the solenoid valve 108 for 2 minutes and 30 seconds while the operating switch 110 is operated and the operating signal of the operating switch is inputted. And the replenishment water is supplied from the outside to the highest water level (1) of the water storage tank 103 through the opening / closing valve 106.

 The temperature signal of the refrigerant of the refrigerant detection sensor 111 transmitted to the control unit 109 is ignored for 2 minutes and 30 seconds since the temperature of the refrigerant is relatively high for 2 minutes and 30 seconds from the initial supplementation (A) The replenishing water is supplied to reach the maximum water level. When the water level reaches the maximum water level (1) even during the supply of the replenishing water, the raising valve (107) is closed to close the opening / closing valve (106).

 As shown in Figs. 6 and 7, in the first supplement B, the supplement water is supplied to the water reservoir for 2 minutes and 30 seconds in the initial supplement A, and then the solenoid valve 108 is turned off, When the temperature signal of the refrigerant is received from the refrigerant temperature detection sensor 111 and the signal corresponding to the specified temperature is not received, the solenoid valve is opened for 5 seconds after 30 seconds elapse and the supplement water is supplied to the water reservoir.

 As described above, the first supplement (B) is performed three minutes after the start of the ice-making operation, so that the initial ice-making water replenished for the first 30 seconds is changed into ice through the initial ice- As shown in FIGS. 6 and 7, the water level is lowered to the first sewage water level (1-1) reduced by a certain amount from the highest water level (1), supplementary water is supplied for 5 seconds, 1 constant (2).

 The second supplement (C) detects whether or not a specific temperature is reached by the refrigerant temperature detection sensor (111) after completing the first supplement (B), and if the specific temperature is not detected, the solenoid valve is opened And supplies replenishment water. That is, as shown in FIGS. 6 and 7, when the temperature of the refrigerant detected after the completion of the first supplement (B) does not reach the specific temperature, the supplement water is supplied from the outside to the reservoir for 5 seconds after the elapse of 30 seconds.

 As shown in Figs. 6 and 7, the second supplement C is a first supplement (B), and a portion of the ice-making water is ice The water level of the water tank is lowered as the water level changes, and after 30 seconds, the sewage water level is lowered to the second sewage water level (2-1) lower than the first sewage water level (1-1) The ice water is supplied for 5 seconds, which is the same time as the first constant water (2), so that the constant water is above the second constant water (3) lower than the first constant water (2).

 As shown in FIGS. 6 and 7, the third supplement (D) is a process for detecting whether or not a specific temperature has been reached in the refrigerant temperature detection sensor 111 after completion of the second supplement (C) After a certain period of time, the solenoid valve is opened for a predetermined time to supply the replenishing water. That is, when the temperature of the refrigerant detected after the completion of the second supplement C is not reached to the specific temperature, the supplement water is supplied from the outside to the reservoir for 5 seconds after the lapse of 30 seconds.

 As described above, the water level of the water storage tank is lowered as part of the ice-making water is changed into ice through the ice-making operation for 30 seconds in the state where the water is in the second constant water level (3) After 30 seconds, the sewer is lowered to the third sewer (3-1) lower than the second sewer (2-1), and the replenishment water is replenished for 5 seconds, which is the same time as the second replenishment So that the constant is above the third constant (4) above the second constant (3).

 As shown in FIG. 6 and FIG. 7, the fourth supplement (E) is a process for detecting whether or not a specific temperature is reached in the refrigerant temperature detection sensor 111 after completing the third supplement (D) The control unit opens the solenoid valve for a predetermined time after a lapse of a predetermined time to supply the replenishing water. That is, if the temperature of the refrigerant detected after completion of the third supplement (D) does not reach the specific temperature, the supplement water is supplied from the outside to the reservoir for 5 seconds after the elapse of 30 seconds.

 As shown in FIGS. 6 and 7, the fourth supplement (E) is a third supplement (D) in which the third constant water (4) As the water level changes, the water level drops. After 30 seconds, the sewage level is lowered to the fourth sewage (4-1) lower than the third sewage (3-1), and the third supplement (D) The ice water is supplied for 5 seconds, which is the same time as that of the first constant water (5), so that the constant water is above the third constant water (4) to be the fourth constant water (5).

 As shown in Figs. 6 and 7, the fifth supplementary supplement (F) to the eighth supplementary supplement (I) are supplemented for the same period of time at the same intervals as the first supplementary supplement (B) to the fourth supplementary (E) As the replenishment step progresses, the water level and the sewage level gradually decrease.

 After the 8th supplement (I), when the temperature of the refrigerant reaches a certain temperature, the supply of the make-up water is stopped and the operation is continued for 3 minutes to lower the water level to the final water level (9-1) In this way, hot gas is circulated through the ice making plate to dissolve the contact surface of the ice formed on each grid surface of the ice making plate to perform ice making.

 As shown in FIG. 6, the water level of the water storage tank is changed to ice by changing the amount of deicing water to ice through the deicing operation for 3 minutes under the eighth constant water level (9) -1) to a final water level (9-1) that is close to the lowest water level reduced.

 After the temperature of the refrigerant reaches the specific temperature, the ice-making operation is continued for 3 minutes. In the final water level where the water level is close to the minimum water level, the cooling device circulates the hot gas to the ice- And the ice-making operation is terminated once. If all of these processes are performed, the time required for the first ice-making operation is 10 minutes and 10 seconds, and if ice is further required, the ice-making operation of the same process is automatically repeated.

 The number and time of replenishing water supply in the embodiment of the present invention is such that the maximum amount of 47% by weight (705 ml) of the total amount of ice making water is stored in the water storage tank 103 at the beginning of the ice making operation, This is a vertical type ice maker which is filled with ice water circulation device and starts ice-making operation once with a total of 1500 ml of deicing water.

 As shown in the following Table 1, when the temperature of the water tank of the prior art having the same capacity as that of the above-described embodiment of the present invention is measured, Deg.] C, and then gradually lowered to 0.7 [deg.] C, which is lower than 0.5 [deg.] C lower than 1.4 [deg.] C in the prior art at a specific temperature reaching time of 7 minutes. As a result, Seconds, but the present invention is 10 minutes and 10 seconds faster.

Ice-driving elapsed time BACKGROUND ART Reservoir water temperature
(° C) The reservoir water temperature
(° C) Difference (℃) 1 minute 2 1.3 0.7 2 minutes 1.3 1.3 0 3 minutes 1.5 1.1 0.2 4 minutes 1.0 1.0 0 5 minutes 1.2 0.9 0.3 6 minutes 1.3 0.9 0.3 7 minutes 1.4 0.9 0.5 Total time of ice making 13 minutes 40 seconds 10 minutes 10 seconds

 Unlike the above-described embodiment, when the total ice-making quantity stored in the ice-maker is increased or decreased, that is, when the ice-maker capacity including the water-tank capacity is changed, the replenishment water supply of the water- The supply of the refrigerant is controlled on the basis of whether or not the refrigerant reaches a specific temperature, and the supplementary process consisting of the first supplement to the eighth supplement is increased or decreased, the supply interval and the supply time of the supplementary water are adjusted, It is obvious that the ice making operation can be performed while lowering the water level of the water storage tank by adjusting the supply amount of the make-up water by increasing or decreasing the capacity of the makeup water supply line. Therefore, the description of the further embodiments is omitted.

 As described above, according to the present invention, the replenishing water supplied from the outside to the water storage tank 103 is supplied to the ice storage tank 103 while the water level is lowered during the ice making operation, thereby supplying the ice-making water cooled by the low-temperature deicing water recovered from the ice- .

 Further, instead of determining whether the ice is completed by energizing the ice-making completed work through the ice formed on the ice-making plate 101, the regeneration temperature of the refrigerant circulating through the ice-making plate 101 is detected, So that it is possible to prevent defective ice making and breakdown of the ice maker due to the de-icing operation.

101: Ice plate 102: Cooling unit
103: Water tank 104: injection pipe
105: water pump 106: opening / closing valve
107: Brake 108: Solenoid valve
109: control unit 110: operation switch
111: Refrigerant temperature detection sensor

Claims (4)

A water storage tank (103) which stores a smaller amount of ice-making water than an amount of ice-making water required for one ice-making operation and is supplied with replenishing water from the outside during one ice-making operation; An ice making plate (101) which is supplied with deicing water and freezes and drops the unfrozen low temperature iced water into a water storage tank; In a vertical type ice maker including a control unit (109) for controlling an ice making operation,
The control unit repeatedly controls the supply of the replenish water supplied to the water reservoir at a predetermined interval for a predetermined period of time according to whether or not a specific temperature of the refrigerant detected during the ice making operation reaches the predetermined temperature. The supplementary water is supplied repeatedly for a certain period of time after the lapse of a certain time so that the level of the water tank gradually decreases gradually until the temperature of the refrigerant reaches the specific temperature,
When the temperature of the refrigerant reaches a specific temperature, stop supplying the replenish water, continue the ice-making operation for a predetermined time to control the final water level close to the minimum water level,
Wherein the controller controls the ice maker so that the ice of the ice maker is de-scavenged by supplying the hot gas to the ice maker in the final water level. The method according to claim 1,
An open / close valve 106 is provided at an end of the ice-making water inlet pipe of the water storage tank 103 by a bore 107. A solenoid valve 108 is installed at a position spaced apart from the open / ,
The control unit 109 mounts a refrigerant temperature detection sensor 111 for detecting the temperature of the refrigerant at the outlet side of the cooling device which is circulated and circulated through the cooling device 102 installed in the ice making plate 101,
Wherein the control unit controls the supply of supplementary water to the reservoir through the solenoid valve opening and closing by applying or shutting off the power to the solenoid valve at predetermined intervals for a predetermined time according to whether or not the refrigerant detected by the refrigerant temperature detection sensor reaches a specific temperature. Vertical type ice maker for ice making. delete delete

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