JP2010243057A - Auger ice-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auger ice-making machine capable of stably making/supplying good ice and mitigating load of managing equipment by reducing the drainage volume. <P>SOLUTION: A water quality concentration region a database of which is made beforehand is stored in a ROM 62. An exchanging period of ice-making water in an ice-making cylinder 24 is determined based on numerical comparison between water quality concentration of the ice-making water supplied to the auger ice-making machine 20 input by a key board 66 and the water quality concentration region database stored in the ROM 62. In each exchanging period of the ice-making water, an ice-making water discharge valve 16 is opened after closing an ice-making water supply valve 15 to discharge the ice-making water in the ice-making cylinder 24. After a predetermined time passes, the ice-making water supply valve 15 is opened after closing the ice-making water discharge valve 16, and the ice-making water is supplied from a water reserver tank 10 to the ice-making cylinder 24. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an auger type ice making machine mounted on a cup type vending machine or an ice supply device for selling cold beverages.

An auger type ice making machine is known as an ice making machine mounted on a cup type vending machine. The auger type ice making machine is a rotating rotary blade (hereinafter referred to as “auger”) that cools the drinking water supplied from a water supply tank (hereinafter referred to as “water reservoir tank”) and causes the thin ice that has been deposited on the inner wall surface of the ice making cylinder to rotate. The ice making part for scraping up and producing ice pieces, and the ice storage part for storing the produced ice pieces on the cocoon cake.
The ice making unit is wound around the auger drive motor, an auger connected through a speed reducer that reduces and transmits the rotation of the auger drive motor, an ice making cylinder through which the auger is inserted, and an outer peripheral surface of the ice making cylinder An evaporating pipe of the refrigeration cycle apparatus, an ice compression extrusion head provided above the auger, an ice making cylinder and a heat insulating material surrounding the evaporating pipe are provided, and a water inlet is provided at the lower part of the ice making cylinder. The inlet is connected to a water reservoir tank by a water supply pipe.

The ice storage part is provided with an ice storage chamber composed of a heat insulating wall having a circular cross section in the upper part of the ice making part, and inside thereof an agitator for stirring ice pieces attached on the axis of a rotating shaft coaxial with the auger, It is provided with a spider for storing ice pieces (having a function of draining molten water in which the ice pieces have melted) disposed between the agitator and the bottom of the ice storage chamber. A drainage port for draining molten water is provided at the bottom of the ice storage chamber, and the drainage port communicates with a water inlet at the bottom of the ice making cylinder through a drainage pipe. The ice storage chamber is equipped with an ice amount detection plate. When ice pieces are produced in the ice making unit and stored in the ice storage chamber and the ice amount detection plate is pushed up to reach a predetermined height, ice making is stopped and When the piece is carried out or melted, the amount of ice is reduced and the ice amount detection plate is lowered to a predetermined position, and ice making is started again.
The auger type ice maker does not have the function of adjusting the water level of the ice making water in the ice making cylinder, and the water level of the water reservoir tank connected to the water supply pipe so that the water level is appropriate for ice making in the ice making cylinder. Is decided. When the drinking water level stored in the water reservoir tank falls to the lower limit water level, the tank water supply valve is opened to supply water, and when the upper limit water level is reached, the tank water supply valve is closed to stop water supply. The water level is always kept within the range of the upper and lower water levels appropriate for producing ice pieces.

As described above, in order to produce good quality ice pieces with an auger type ice making machine, it is desirable that the water level in the ice making cylinder is always kept at a predetermined level, and if the water level in the ice making cylinder is too high, it is soft and has a sherbet-like shape. If it becomes ice and it is too low, the ice will become too hard in the ice making cylinder to generate abnormal noise, or overload will be applied to the auger drive motor (for example, see Patent Document 1).
Moreover, the amount of impurities contained in the drinking water varies depending on the location where the auger ice making machine is installed. Furthermore, even if the amount of impurities contained in the drinking water supplied to the auger type ice making machine is very small, the impurities contained in the ice making water gradually increase as ice making is continuously performed in the ice making cylinder. When the amount of impurities contained in the ice making water increases, the amount of impurities contained in the manufactured ice also increases, and brittle and poor quality ice can be formed. As a method to prevent the production of such poor quality ice, an ice-making water drain valve is provided in the ice-making cylinder, and the drinking water stored in the water reservoir tank is supplied while draining the ice-making water by opening the drain valve. There is also a method in which the ice-making water is replaced (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 9-4950 JP-A 61-268969

However, there are many cases where there is no drainage facility at the place where the cup-type vending machine is installed, and when drainage is stored in the drainage tank provided in the cup-type vending machine, the drainage tank capacity is limited, When the amount of drainage increases and the drainage tank reaches full capacity, the cup vending machine will stop selling, and each time a vending machine administrator will need to go out and empty the drainage tank, increasing the burden of managing equipment There was a problem.
In view of the above circumstances, an object of the present invention is to provide an auger type ice making machine that can stably manufacture and supply high-quality ice and further reduce the load of managing equipment by reducing the amount of drainage.

In order to achieve the above object, an auger type ice making machine according to claim 1 of the present invention is an ice making machine that is supplied from a water supply tank to an inner wall surface of an ice making cylinder in which an evaporation pipe of a refrigeration cycle device is wound on an outer peripheral surface. The ice making unit that manufactures ice pieces by scraping the thin ice that has been iced by cooling the water with the rotation of the spiral rotary blade, stores the produced ice pieces, and opens the ice outlet according to the ice take-out instruction. In an auger type ice making machine equipped with an ice storage unit that opens and carries out ice pieces,
An ice making water supply valve is provided in a water supply pipe for supplying ice making water from the water supply tank to the ice making cylinder, and an ice making water discharge valve is provided in a drain pipe for discharging ice making water in the ice making cylinder. .
Further, the auger type ice making machine according to claim 2 of the present invention stores the water quality concentration region previously stored in the database in claim 1 described above, and the water quality concentration of the ice making water supplied to the auger type ice making machine An ice making water exchange period in the ice making cylinder is determined based on a numerical comparison with a stored water quality concentration region database, and the ice making water discharge is performed after the ice making water supply valve is closed for each ice making water exchange period. Open the valve to discharge the ice making water in the ice making cylinder, and after a predetermined time has elapsed, close the ice making water discharge valve and then open the ice making water supply valve to supply ice making water from the water supply tank to the ice making cylinder A first control means is provided.

  Further, the auger type ice making machine according to claim 3 of the present invention is the above-mentioned claim 1, wherein a water quality sensor for detecting the water quality of the ice making water is provided, and when the water quality sensor detects an impurity having a predetermined concentration or more, The ice making water supply valve is closed and then the ice making water discharge valve is opened to discharge ice making water in the ice making cylinder. After a predetermined time has elapsed, the ice making water discharge valve is closed and then the ice making water supply valve is opened. A second control means for supplying ice making water from the water supply tank to the ice making cylinder is provided.

  According to the first aspect of the present invention, the thin ice formed by cooling and icing the ice-making water supplied from the water supply tank to the inner wall surface of the ice-making cylinder having the evaporation pipe of the refrigeration cycle device wound around the outer peripheral surface is spirally rotated. An ice making unit that produces ice pieces by scraping with the rotation of the blade, and an ice storage unit that stores the produced ice pieces and opens the ice carry-out port based on the ice carry-out instruction to carry out the ice pieces. In an auger type ice making machine, an ice making water supply valve is provided for a water supply pipe for supplying ice making water from a water supply tank to an ice making cylinder, and an ice making water discharge valve is provided for a drain pipe for discharging ice making water in the ice making cylinder. When the ice making water discharge valve is opened to discharge ice making water in the ice making cylinder, the ice making water supply valve is closed, so that the ice making water supplied from the water supply tank with good water quality and large storage capacity is not discharged, and there are many impurities. Only a small amount of ice-making water in the ice-making cylinder is discharged With the auger type, it is possible to stably produce and supply good quality ice from newly supplied water with good quality, and further reduce the load of managing equipment by reducing the discharge amount of ice making water An ice machine can be provided.

According to the second aspect of the present invention, the water quality concentration region previously stored in the database is stored, and based on the numerical comparison between the water quality concentration of the ice making water supplied to the auger type ice making machine and the stored water quality concentration region database. The ice making water exchange cycle in the ice making cylinder is determined, and at each ice making water exchange cycle, the ice making water supply valve is closed and then the ice making water discharge valve is opened to discharge the ice making water in the ice making tube, and a predetermined time has elapsed. After the ice making water discharge valve is closed, the ice making water supply valve is opened, and the first control means for supplying ice making water from the water supply tank to the ice making cylinder is provided. Ice can be manufactured and supplied in a stable manner, and the amount of ice making water discharged is reduced according to the quality of the ice making water supplied at the location where the auger ice making machine is installed, reducing the burden of managing equipment. Ogre that can be It is possible to provide an ice-making machine.
According to the invention of claim 3, the water quality sensor for detecting the quality of the ice making water is provided, and when the water quality sensor detects an impurity having a predetermined concentration or more, the ice making water discharge valve is closed after the ice making water supply valve is closed. Opening and discharging ice making water in the ice making cylinder. After a predetermined time has elapsed, the ice making water discharge valve is closed and then the ice making water supply valve is opened to provide second control means for supplying ice making water from the water supply tank to the ice making cylinder. As a result, it is possible to stably produce and supply high-quality ice from newly supplied water with good quality, and to manage the equipment by reducing the discharge of the ice-making water according to changes in the quality of the ice-making water. It is possible to provide an auger type ice making machine capable of reducing the load to be applied.

It is explanatory drawing which showed the structure of the auger type ice making machine which concerns on Embodiment 1 of this invention. It is a control block diagram of the auger type ice making machine shown in FIG. It is a water quality area | region database of the auger type ice making machine shown in FIG. It is a flowchart figure which shows control of the auger type ice making machine shown in FIG. It is a figure which shows the change of the electrical conductivity of the ice making water of the auger type ice making machine shown in FIG. It is explanatory drawing which showed the structure of the auger type ice making machine which concerns on Embodiment 2 of this invention. FIG. 7 is a control block diagram of the auger type ice making machine shown in FIG. 6. It is a flowchart figure which shows control of the auger type ice making machine shown in FIG.

Exemplary embodiments of an auger type ice making machine according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.
(Embodiment 1)
FIG. 1 is an explanatory view schematically showing a configuration of a cup type vending machine 1 equipped with an auger type ice making machine 20 according to Embodiment 1 of the present invention. A water reservoir tank (water supply tank) 10, an auger The partially broken side view of the type ice making machine 20, the hot water tank 50, and the pipe line which connects each apparatus are shown. The water reservoir tank 10 always keeps drinking water (tap water) supplied from the water supply at a predetermined water level (a range between an upper water level and a lower water level suitable for producing high quality ice pieces with the auger ice making machine 20). Therefore, when the stored drinking water falls to the water supply start water level (lower limit water level), water is supplied. A water supply start switch 12 that outputs a start signal and a water supply stop switch 13 that outputs a water supply stop signal when drinking water rises to a water supply stop water level (upper limit water level) are provided.

  Then, when the float 11 moves up and down with the fluctuation of the level of potable water stored in the tank 14 and the water supply start switch 12 outputs a water supply start signal, the control unit 60 (see FIG. 2) causes the tank water supply valve 9 to move. When the water supply stop switch 13 outputs a water supply stop signal, the tank water supply valve 9 is closed to stop water supply. The tank 14 is communicated with an ice making cylinder 24 of an auger type ice making machine 20 through a water supply pipe T1 through an ice making water supply valve 15. As the ice making water supply valve 15, a normally open solenoid valve is used that opens when not energized and closes when energized. In this way, the drinking water stored in the water reservoir tank 10 that is always kept within the range of the upper limit water level and the lower limit water level suitable for producing good quality ice pieces with the auger type ice making machine 20 is supplied through the water supply pipe T1. The drinking water supplied from the water reservoir tank 10 to the ice making cylinder 24 is hereinafter referred to as “ice making water”.

When the refrigeration cycle device 45 is operated and the auger drive motor 22 of the auger type ice making machine 20 is operated, the ice making water supplied from the water reservoir tank 10 into the ice making cylinder 24 is cooled to produce ice pieces (hereinafter referred to as “ice pieces”). The drinking water in the ice making cylinder 24 is called “ice making water”). The water supply pipe T2 connected to the water reservoir tank 10 communicates with the water supply pump 18 through the orifice 17 through the water supply pipe T3. When the water supply pump 18 is operated, the potable water stored in the water reservoir tank 10 is stored. It is supplied to the hot water tank 50 and the carbonator (carbonated water production apparatus).
The auger type ice making machine 20 cools the ice making water supplied from the water reservoir tank 10 and scrapes the thin ice formed on the inner wall surface of the ice making cylinder 24 by the rotation of a spiral rotary blade (hereinafter referred to as “auger”) 23. The ice making unit 21 that manufactures ice pieces, and the ice storage unit 30 that stores the manufactured ice pieces on the spider 33 are configured.

The ice making unit 21 includes an auger drive motor 22, an auger 23 connected via a speed reducer (not shown) that reduces and transmits the rotation of the auger drive motor 22, and an ice making cylinder 24 through which the auger 23 is inserted. The evaporating pipe 46 of the refrigeration cycle device 45 wound around the outer peripheral surface of the ice making cylinder 24, the extrusion head 25 for ice compression provided above the auger 23, and the heat insulation surrounding the ice making cylinder 24 and the evaporating pipe 46 A material 26 is provided. The ice making cylinder 24 is provided with a water inlet 27 and is connected to the water reservoir tank 10 through a water supply pipe T1 through an ice making water supply valve 15.
The ice storage unit 30 is provided with an ice storage chamber 31 formed of a heat insulating wall having a circular cross section at the top of the ice making unit 21. Inside the ice storage chamber 31, an agitator 32 for stirring ice pieces attached around the axis of a rotating shaft 23 a coaxial with the auger 23, and an ice piece disposed between the agitator 32 and the bottom 31 a of the ice storage chamber 31. It is provided with a mounting kite 33 (having the function of draining molten water in which ice pieces are melted) 33. Further, an ice carry-out port 34 having an ice carry-out door 36 that is opened and closed by a door opening / closing mechanism 35 is provided on the side wall of the ice storage chamber 31. When the door opening / closing mechanism 35 is driven to open the ice carry-out door 36, the ice pieces stored on the cage 33 and stirred by the agitator 32 are carried out from the ice carry-out port 34, slide down the ice carry-out chute 37, and the cup. It is supplied to a cup placed in a sales outlet (not shown) of the automatic vending machine 1. Furthermore, an ice amount detection plate 39 is provided on the upper cover 38 of the ice storage chamber 31, and an ice making start switch 40 that outputs an ice making start signal when the ice amount decreases and the ice amount detection plate 39 falls to the ice storage amount lower limit position; An ice making stop switch 41 is provided that outputs an ice making stop signal when the ice making operation proceeds and the ice storage amount increases and the ice amount detection plate 39 is pushed up to the ice making stop position.

The bottom 31a of the ice storage chamber 31 is provided with a drain outlet 42 for draining dissolved water in which ice pieces are melted. The drain outlet 42 is a drain pipe T4, a water inlet 28 provided at the lower part of the ice making cylinder 24, the ice making cylinder 24, water The inlet 27 and the ice-making water supply valve 15 are connected to the water reservoir tank 10 by a water supply pipe T1. Further, a drain pipe T5 is connected to the drain pipe T4 via an ice making water discharge valve 16, and the end of the drain pipe T5 communicates with a drain tank (not shown). As the ice making water discharge valve 16, a normally closed solenoid valve is used that closes the valve when not energized and opens the valve when energized. Furthermore, the drain pipe T4 is connected to the water supply pipe T3 via the communication pipe T6.
The refrigeration cycle apparatus 45 includes a compressor that compresses a gas refrigerant into a high-temperature and high-pressure gas refrigerant, a condenser that cools the high-temperature and high-pressure gas refrigerant into a liquid refrigerant by heat exchange with air, and liquefies with the condenser An expansion valve that lowers the pressure of the high-pressure liquid refrigerant, and an evaporation pipe 46 that cools the ice-making water supplied from the water reservoir tank 10 by the evaporation heat (vaporization heat) of the liquid refrigerant and causes the ice-making cylinder 24 to be iced. And a refrigerant pipe for returning the gas refrigerant evaporated by the evaporation pipe 46 to the compressor.

  A water supply pipe T7 is connected to the water supply pump 18, and a water supply pipe T8 provided with a drinking water electromagnetic valve 56 is connected to the hot water tank 50 in the middle thereof. When the water supply pump 18 is operated and the drinking water electromagnetic valve 56 is opened, the drinking water is pumped from the water reservoir tank 10 to the hot water tank 50. And the float 51 which moves up and down with the fluctuation | variation of the water level of the stored drinking water, and the position of the float 51 are detected, and when the stored drinking water falls to the water supply start water level (lower limit water level), the water supply start signal And a water supply stop switch 53 that outputs a water supply stop signal when the drinking water rises to the water supply stop water level (upper limit water level), and the drinking water is between the water supply start water level and the water supply stop water level. The water level is always maintained and stored, and the electric heater 55 is heated to 95 ° C. to 97 ° C. When the hot water supply electromagnetic valve 54 is opened, hot water heated to 95 ° C. to 97 ° C. is supplied to a coffee liquid extraction device (not shown).

FIG. 2 is a control block diagram of the cup type vending machine 1 on which the auger type ice making machine 20 is mounted. A control unit (first control means) 60 for controlling the vending machine 1 is a CPU 61 as a central processing unit. A ROM (read only memory) 62 for storing a control program for the CPU 61, a RAM (random access memory) 63 for storing various programs and data necessary for the control of the CPU 61, and a reference clock generator (not shown) The timer 64 that counts the clocks generated in step 1) and counts various times, and the energization unit 65 having a power circuit that energizes each device provided in the cup type vending machine 1.
The controller 60 also includes a keyboard 66 for inputting various setting data of the cup-type vending machine 1, and a water supply start signal for outputting a water supply start signal when the potable water stored in the water reservoir tank 10 falls to the water supply start water level. Switch 12, a water supply stop switch 13 that outputs a water supply stop signal when the water supply stop water level rises, a tank that opens and closes a valve by a signal output from the water supply start switch 12 and the water supply stop switch 13 and supplies drinking water to the water reservoir tank 10 Water supply valve 9, when not energized, the valve is opened, and when energized, the ice making water supply valve 15, which is a normally open solenoid valve that closes the valve, when not energized, the valve is closed and energized An auger drive motor that rotates an ice making water discharge valve 16 that is a normally closed solenoid valve that opens the valve and an auger 23 connected via a speed reducer 2, such as the refrigeration cycle apparatus 45 for icing is connected to the evaporation heat at (vaporization heat) cooling the supplied ice making water from the water reservoir tank 10 ice making cylinder 24 inner wall surface of the evaporation pipe 46.

  The ROM 62 of the control unit 60 stores (stores) a water quality concentration area that is stored in advance as a database, and the CPU 61 stores the water quality concentration of ice making water supplied to the auger type ice making machine 20 input from the keyboard 66 and the ROM 62. Based on a numerical comparison with the existing water quality concentration region database, the exchange cycle of the ice making water in the ice making cylinder 24 is determined. Then, at each ice making water exchange cycle, the ice making water supply valve 15 is closed, and then the ice making water discharge valve 16 is opened to discharge the ice making water in the ice making cylinder 24, and all the ice making water in the ice making cylinder 24 is discharged. After the elapse of a predetermined time determined as described above, the ice-making water discharge valve 16 is closed, the ice-making water supply valve 15 is opened, and the ice-making water is supplied from the water reservoir tank 10 to the ice-making cylinder 24, whereby the newly supplied water quality is improved. It is possible to stably produce and supply good quality ice from ice making water, and further reduce the amount of ice making water discharged according to the quality of ice making water supplied at the place where the auger type ice making machine 20 is installed. The management load can be reduced.

FIG. 3 is a water quality concentration area database stored in the ROM 62. When the water quality concentration of the ice making water supplied to the auger type ice making machine 20 corresponds to the water quality concentration area A, the replacement cycle of the ice making water is TA time. When the water quality concentration region D is satisfied, the ice-making water exchange period is TD time.
FIG. 4 is a flowchart showing the control of the control unit 60 for replacing the ice making water in the ice making cylinder 24 of the auger type ice making machine 20 according to the first embodiment of the present invention every cycle. The ice making water supply valve 15 is opened, the ice making water discharge valve 16 is closed, and the refrigeration cycle apparatus 45 and the auger drive motor 22 are appropriately operated. First, the water quality concentration of ice making water (for example, tap water) supplied to the auger type ice making machine 20 is measured and input with the keyboard 66. The control unit 60 is based on a comparison of numerical values (for example, water quality concentration region A) between the water quality concentration of the ice making water supplied to the auger type ice making machine 20 input from the keyboard 66 and the water quality concentration region database stored in the ROM 62. An exchange period (for example, TA time) of ice making water in the ice making cylinder 24 is determined (step S11).

When the accumulated ice making time of the auger type ice making machine 20 reaches the ice making water replacement cycle (for example, TA time) (step S12: “ice making integrated time ≧ exchange cycle” Yes), the refrigeration cycle device 45 and the auger drive motor 22 are stopped. (Step S13), the ice-making water supply valve 15 is closed (Step S14), and the ice-making water discharge valve 16 is opened (Step S15). When a predetermined time determined so that all the ice making water in the ice making cylinder 24 is discharged (step S16: “predetermined time elapse” Yes), the ice making water discharge valve 16 is closed (step S17), and the ice making water is supplied. The supply valve 15 is opened (step S18), the ice making integrated time is reset (step S19), the refrigeration cycle device 45 and the auger drive motor 22 are operated as appropriate (step S20), and the ice making cylinder from the water reservoir tank 10 is operated. 24. Supply new ice-making water to 24 to produce high-quality ice pieces.
FIG. 5 is a diagram showing a change in the electrical conductivity of ice making water in the ice making cylinder 24 of the auger type ice making machine 20. The electrical conductivity indicates the ease of electricity flow in water. The more the contained impurities, the higher the electrical conductivity, and the less the impurities, the lower the electrical conductivity. When the ice making water becomes ice in the ice making cylinder 24, it tries to remove impurities from the ice. Therefore, the impurity concentration of the ice making water in the ice making cylinder 24 gradually increases with the ice making, and the electrical conductivity increases. After all the ice making water in the cylinder 24 is discharged, new ice making water is supplied from the water reservoir tank 10 into the ice making cylinder 24, and the electric conductivity is lowered as shown in FIG. It can be seen that the impurities contained are reduced. Impurities are not completely removed from the ice and are present in the ice storage chamber 31 together with the ice pieces, making the ice brittle and easy to melt, but producing good quality ice from newly supplied water for making ice with good quality. As a result, the ice pieces can be supplied stably.

Furthermore, for example, assuming that the water storage volume of the water reservoir tank 10 is 1 liter, the ice making cylinder 24 ice making water volume 0.2 liter, and the drainage tank volume 10 liter, conventionally, the water reservoir tank 10 ice making water (potable water) 1 liter and ice making cylinder are used. A total of 1.2 liters of drainage water totaling 0.2 liters of ice making water in 24 was discharged to the drainage tank, but in the cup type vending machine 1 equipped with the auger type ice making machine 20 according to the present invention, the ice making cylinder Since only 0.2 liters of ice making water in 24 is discharged to the drainage tank, the discharge amount of ice making water is reduced according to the quality of ice making water supplied at the place where the auger type ice making machine 20 is installed. Thus, it is possible to provide an auger type ice making machine 20 capable of reducing the load of managing the equipment.
(Embodiment 2)
Next, the configuration of the cup type vending machine 1 equipped with the auger type ice making machine 20 according to Embodiment 2 of the present invention will be described with reference to FIGS. The same reference numerals are used for the same configurations as those in the first embodiment. In the first embodiment, a water quality concentration area created in advance as a database is stored in the ROM 62, and the water quality concentration area database stored in the ROM 62 and the water quality concentration of the ice making water supplied to the auger type ice making machine 20 input from the keyboard 66. The ice-making water exchange period in the ice-making cylinder 24 is determined based on the numerical comparison with the above, and at each ice-making water exchange period, the ice-making water supply valve 15 is closed, and then the ice-making water discharge valve 16 is opened and the ice making water pipe 24 is opened. After the predetermined time has elapsed, the ice making water discharge valve 16 is closed, and then the ice making water supply valve 15 is opened to supply ice making water from the water reservoir tank 10 to the ice making cylinder 24 (first control unit 60). In the second embodiment, the water quality sensor 19 for detecting the quality of the ice-making water is provided, and the water quality sensor 19 detects an impurity having a predetermined concentration or higher. In this case, the ice making water supply valve 15 is closed and then the ice making water discharge valve 16 is opened to discharge the ice making water in the ice making cylinder 24. After a predetermined time has elapsed, the ice making water discharge valve 16 is closed and then the ice making water supply valve is opened. A control unit 80 (second control means) for opening ice 15 and supplying ice making water from the water reservoir tank 10 to the ice making cylinder 24 is provided. Also in the second embodiment, it is possible to stably produce and supply good quality ice from newly supplied ice water with good quality, and further reduce the discharge amount of the ice making water according to the change in the quality of the ice making water. Thus, it is possible to provide an auger type ice making machine 20 capable of reducing the load of managing the equipment.

The water quality sensor 19 is arranged at the water inlet 28 communicating with the ice making cylinder 24 so as to detect the water quality of the ice making water. However, the water quality sensor 19 is arranged in the ice making cylinder 24 so that the water quality of the ice making water is obtained. May be detected. The water quality sensor 19 detects the water quality of the ice making water by measuring the electric conductivity (also called conductivity or electric conductivity) of the ice making water. The electrical conductivity indicates the ease of electricity flow in water. The greater the impurity, the higher the electrical conductivity value, and the smaller the impurity, the smaller the electrical conductivity value. In addition, since the electrical conductivity represents the total concentration of ions and does not depend on the type of ions, the quality of ice-making water can be detected by indicating all impurities with one index.
FIG. 8 is a flowchart showing the control of the control unit 80 for exchanging ice making water in the ice making cylinder 24 of the auger type ice making machine 20 according to the second embodiment of the present invention, and a water quality sensor for detecting the quality of ice making water. The ice making water in the ice making cylinder 24 is replaced when 19 detects an impurity having a predetermined concentration or higher. First, the ice-making water supply valve 15 is opened, the ice-making water discharge valve 16 is closed, and the refrigeration cycle apparatus 45 and the auger drive motor 22 are appropriately operated.

  When the impurity concentration of the ice making water detected by the water quality sensor 19 reaches a predetermined concentration (step S21: “impurity concentration ≧ predetermined concentration” Yes), the refrigeration cycle apparatus 45 and the auger drive motor 22 are stopped ( Step S22), the ice-making water supply valve 15 is closed (Step S23), and the ice-making water discharge valve 16 is opened (Step S24). When a predetermined time determined so that all the ice making water in the ice making cylinder 24 is discharged (step S25: “predetermined time has passed” Yes), the ice making water discharge valve 16 is closed (step S26), and the ice making water is supplied. The supply valve 15 is opened (step S27), the refrigeration cycle device 45 and the auger drive motor 22 are operated as appropriate (step S28), and new ice-making water is supplied from the water reservoir tank 10 to the ice-making cylinder 24 to produce good quality ice. Manufacture and supply pieces.

1 Cup type vending machine 10 Water reservoir tank (water supply tank)
DESCRIPTION OF SYMBOLS 15 Ice making water supply valve 16 Ice making water discharge valve 19 Water quality sensor 20 Auger type ice making machine 21 Ice making part 23 Auger (spiral rotary blade)
24 ice making cylinder 30 ice storage part 34 ice carry-out port 45 refrigeration cycle apparatus 46 evaporation pipe 60 control part (first control means)
80 control unit (second control means)
T1 water supply pipe T5 drainage pipe

Claims (3)

Ice flakes are formed by cooling the ice making water supplied from the water supply tank on the inner wall surface of the ice making cylinder with the evaporation pipe of the refrigeration cycle device wound on the outer peripheral surface, and icing it with the rotation of the spiral rotary blade. In an auger type ice making machine comprising: an ice making unit that manufactures the ice piece; and an ice storage unit that stores the produced ice piece and opens an ice carry-out port based on an ice carry-out instruction to carry out the ice piece.
An ice making water supply valve is provided in a water supply pipe for supplying ice making water from the water supply tank to the ice making cylinder, and an ice making water discharge valve is provided in a drain pipe for discharging ice making water in the ice making cylinder. Ogre type ice machine.   A water quality concentration area stored in advance in a database is stored, and ice making water in the ice maker is based on a numerical comparison between the water quality concentration of ice making water supplied to the auger type ice making machine and the stored water quality concentration area database. An exchange cycle is determined, and at each ice making water exchange cycle, the ice making water supply valve is closed, then the ice making water discharge valve is opened to discharge ice making water in the ice making cylinder, and after a predetermined time has elapsed, the ice making water The auger type ice making machine according to claim 1, further comprising a first control means for closing the discharge valve and then opening the ice making water supply valve to supply ice making water from the water supply tank to the ice making cylinder. . A water quality sensor for detecting the water quality of the ice making water is provided, and when the water quality sensor detects an impurity of a predetermined concentration or more, the ice making water supply valve is closed and then the ice making water discharge valve is opened to make the ice making water in the ice making cylinder. Discharging the water and, after a predetermined time has elapsed, providing the second control means for closing the ice making water discharge valve and then opening the ice making water supply valve to supply ice making water from the water supply tank to the ice making cylinder. The auger type ice making machine according to claim 1, characterized in that:

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