WO2010109724A1 - 自動製氷機 - Google Patents

自動製氷機 Download PDF

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Publication number
WO2010109724A1
WO2010109724A1 PCT/JP2009/069575 JP2009069575W WO2010109724A1 WO 2010109724 A1 WO2010109724 A1 WO 2010109724A1 JP 2009069575 W JP2009069575 W JP 2009069575W WO 2010109724 A1 WO2010109724 A1 WO 2010109724A1
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WO
WIPO (PCT)
Prior art keywords
water
ice making
deicing
ice
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/069575
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
弘城 山口
勇二 若槻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoshizaki Electric Co Ltd
Original Assignee
Hoshizaki Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoshizaki Electric Co Ltd filed Critical Hoshizaki Electric Co Ltd
Priority to US13/201,207 priority Critical patent/US9146049B2/en
Priority to EP09842334.6A priority patent/EP2413070B1/en
Priority to CN2009801579663A priority patent/CN102348946B/zh
Publication of WO2010109724A1 publication Critical patent/WO2010109724A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2400/00—Auxiliary features or devices for producing, working or handling ice
    • F25C2400/14—Water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2600/00—Control issues
    • F25C2600/04—Control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25C2700/04—Level of water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25C2700/14—Temperature of water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/10—Sensors measuring the temperature of the evaporator

Definitions

  • the refrigerant is supplied to the evaporator, and the ice making water is supplied from the ice making water tank to the ice making unit to produce ice in the ice making unit.
  • This relates to an automatic ice maker that additionally supplies makeup water from an external water source.
  • an automatic ice maker that automatically manufactures a large amount of ice blocks
  • an evaporating pipe derived from a refrigeration system is installed in an ice making section installed vertically, and ice making water is sprayed on the ice making section cooled by this evaporating pipe
  • a flow-down type automatic ice making machine that supplies ice blocks to produce ice blocks and then releases the ice blocks from the ice making unit in the deicing operation.
  • This automatic ice maker is equipped with an ice making water tank to store the required amount of ice making water.
  • the ice making water in the ice making water tank is pumped by the ice making water pump and supplied to the ice making unit, and ice making that has not caused freezing
  • the water is collected in the ice making water tank and then sent out again toward the ice making unit.
  • the deicing water is sprayed and supplied to the back surface of the ice making unit to promote melting of the icing surface with the ice block and the deicing water is supplied to the ice making water tank. This is used as ice making water for the next ice making operation.
  • ice-making water used for one ice-making operation is supplied by supplying normal temperature water from an external water source as de-icing water (ice-making water) during the de-ice operation. Is stored in an ice making water tank, and then the ice making operation is started. That is, the ice making water tank needs to have a capacity capable of storing at least one ice making water amount (hereinafter referred to as a necessary ice making water amount), which causes an increase in the size of the ice making water tank.
  • an ice making water tank with a volume smaller than the required ice making water volume is adopted and the ice making water in the ice making water tank becomes insufficient during ice making operation, water at normal temperature is supplied from an external water source to the ice making water tank via the water supply means.
  • An ice maker that additionally supplies water as makeup water has been proposed. Specifically, a float switch is provided in the ice making water tank, and when the float switch detects the lower limit water level of the ice making water during the ice making operation, supply of makeup water by the water supply means is started. When the float switch detects the upper limit water level of the ice making water, the water supply means stops supplying the makeup water.
  • the size of the ice making machine can be made compact while avoiding the enlargement of the ice making water tank, and the deicing time is shortened (see Patent Document 1).
  • the amount of replenishment water supplied with one water supply is defined as a certain amount until the float switch detects the upper limit water level from the lower limit water level.
  • the temperature of make-up water is high, such as in summer, the temperature of ice-making water in the ice-making water tank rises due to the make-up water supplied to the ice-making water tank.
  • ice blocks in the middle of manufacture are melted by the ice making water in the ice making section, and the melted water is collected together with the ice making water into the ice making water tank.
  • the ice making water level in the ice making water tank reaches the upper limit water level in a short time, and the water supplying means by the water supply per time The amount of makeup water that is substantially supplied from this will be reduced. If such water supply is performed a plurality of times, the total amount of water supply is insufficient, which causes a small-sized ice mass to be produced when ice making is completed.
  • the temperature of the make-up water is low, such as in winter, the temperature rise of the ice making water in the ice making water tank is suppressed, and the amount of ice blocks in the ice making part melted by the ice making water becomes small. For this reason, the ice-making water level in the ice-making water tank rises slowly by the amount of recovered molten water, and the amount of make-up water substantially supplied from the water supply means is larger than when the make-up water is hot. Become more. If such water supply is performed a plurality of times, the total amount of water supply will be excessive this time, causing a huge ice block to be produced in the ice making section when ice making is completed. In addition, since a huge ice block is produced, deicing failure may occur, or the ice making part or the like may be deformed or damaged by the huge ice block.
  • the present invention has been proposed to solve this problem in view of the problems inherent in the automatic ice making machine according to the prior art, and the amount of water supply is changed according to the temperature of the makeup water.
  • An object is to provide an automatic ice making machine.
  • an automatic ice making machine is: Ice making water is supplied while being cooled by an evaporator during ice making operation to produce ice, and an ice making unit from which ice is removed by supplying deicing water from an external water source while being heated by the evaporator during deicing operation;
  • an automatic ice making machine equipped with an ice making water tank capable of storing ice making water supplied to the ice making part during ice making operation and collecting ice making water flowing down the ice making part
  • a deicing timer that counts the deicing completion time required from the start of the deicing operation to the removal of the ice produced in the ice making unit in the ice making operation;
  • Deicing reference elapsed time is preset, and control means for comparing and determining the deicing completion time measured by the deicing timer and the deicing reference elapsed time; During the ice making operation, the control means that determines that the deicing completion time measured by
  • the supplementary water is supplied to the ice-making water tank whose amount of stored water has been reduced by the control means that is controlled to supply supplementary water from the external water source only at a low temperature supply amount, and that the deicing completion time is determined to be shorter than the deicing reference elapsed time.
  • a water supply means that is controlled so as to additionally supply a hot water supply amount that is larger than a low temperature water supply amount.
  • the deicing completion time when the deicing water is hot and the deicing completion time is shorter than the preset deicing reference elapsed time, replenishment of the hot water supply amount higher than the cold water supply amount at the time of water supply in the next ice making operation Since water is supplied, it is possible to prevent ice-making ability from being lowered due to insufficient water supply and to manufacture ice of an appropriate size. If the deicing completion time exceeds the deicing reference elapsed time due to the low temperature of the deicing water, supplementary water with a low-temperature water supply amount that is lower than the high-temperature water supply amount will be supplied at the next ice making operation.
  • the water supply amount is changed based on the deicing completion time that varies depending on the temperature of the deicing water that is the same external water source as the makeup water, the water supply is performed with a water supply amount that accurately reflects the temperature of the makeup water. It is possible to reliably prevent insufficient water supply or excessive water supply.
  • an automatic ice making machine in which ice-making water is supplied while being cooled by an evaporator during an ice-making operation and ice is produced, and an ice-making water that can be stored in the ice-making unit during the ice-making operation and that flows down the ice-making unit
  • An ice making machine equipped with an ice making water tank to which ice making water is supplied from an external water source before the start of ice making operation, An ice making timer that counts the reference temperature arrival time required from the start of the ice making operation until the temperature on the outlet side of the ice making unit in the evaporator is cooled to a preset reference temperature; Ice making reference elapsed time required until the ice making operation is started in a state where ice making water having a predetermined reference temperature is stored in the ice making water tank, and the temperature on the outlet side of the ice making part in the evaporator is
  • the control means that determines that the reference temperature arrival time measured by the ice making timer in the ice making operation is equal to or less than the ice making reference elapsed time is used to cool the make-up water from the external water source to the ice making water tank with a reduced water storage amount.
  • the supplementary water is supplied to the ice-making water tank whose water storage amount has decreased by a control means that is controlled to supply only the hourly water supply amount and is determined that the reference temperature arrival time is longer than the ice making standard elapsed time.
  • a water supply means controlled to additionally supply only the amount of water.
  • the make-up water when the make-up water is hot and the reference temperature arrival time is longer than the preset ice making reference elapsed time, when the make-up water is additionally supplied during the ice making operation, the high-temperature water supply amount is higher than the low-temperature water supply amount. Since make-up water is supplied, it is possible to prevent the ice making capacity from being lowered due to insufficient water supply and to manufacture ice of an appropriate size. If the reference temperature arrival time is less than the ice making standard elapsed time because the make-up water is cold, additional make-up water with a low water supply amount at a low temperature compared to the high temperature is additionally supplied. Can be prevented from being deformed or damaged.
  • the water supply amount is changed based on the reference temperature arrival time that changes depending on the temperature of the ice making water, which is the same external water source as the make-up water, the water supply is made with a water supply amount that accurately reflects the temperature of the make-up water. It can be performed, and water supply shortage and excessive water supply can be reliably prevented.
  • the amount of water supply is changed according to the temperature of the makeup water, so that the ice making capacity is reduced due to the shortage of the water supply amount or the deicing failure due to the excessive water supply amount. It can be prevented from occurring.
  • FIG. 1 is a schematic diagram illustrating an overall configuration of an automatic ice making machine according to Embodiment 1.
  • FIG. 3 is a graph showing a change in the level of ice making water in an ice making water tank in Example 1.
  • FIG. It is a flowchart which shows the procedure which determines water supply mode in the deicing operation of Example 1.
  • FIG. It is a flowchart which shows the procedure which supplies water in low temperature mode in the ice making operation
  • FIG. It is a flowchart which shows the procedure which supplies water in high temperature mode in the ice making operation
  • FIG. 6 is a graph showing a change in water level of ice making water in an ice making water tank in a modified example of Example 1.
  • FIG. 6 is a schematic diagram illustrating an overall configuration of an automatic ice making machine according to a third embodiment. It is a graph which shows the 1st delay time with respect to deicing completion time. 10 is a flowchart illustrating a procedure for determining a water supply mode in the deicing operation of the third embodiment. 6 is a graph showing a change in water level of ice making water in an ice making water tank in Example 3.
  • FIG. 10 is a flowchart illustrating a procedure for determining a water supply mode in an ice making operation according to a fourth embodiment. 10 is a graph showing changes in the water level of ice making water in an ice making water tank in Example 4.
  • an automatic ice maker 10 is a so-called flow-down type automatic ice maker, between a pair of ice making plates 12, 12 (only one is shown in FIG. 1) opposed to each other.
  • a pair of ice making plates 12, 12 are provided with an evaporator tube (evaporator) 14 that is led out from a refrigeration system (not shown) to produce an ice block (ice), and an ice making water is provided below the ice making unit 16 to supply ice making water.
  • An ice-making water tank 18 that can be stored is provided.
  • the evaporating pipe 14 is supplied with a refrigerant from the refrigeration system to cool the ice making unit 16, and in the deicing operation, hot gas is supplied from the refrigeration system to heat the ice making unit 16. ing.
  • a temperature measuring device 20 On the outlet side of the ice making section 16 in the evaporation pipe 14, there is provided a temperature measuring device 20 that measures the temperature of the refrigerant or hot gas that flows through the evaporation pipe 14 and exchanges heat with the ice making section 16.
  • the ice making water tank 18 is provided with a float switch 22 so that the water level of the ice making water in the ice making water tank 18 can be detected by moving the float 22a of the float switch 22 up and down according to the water level of the ice making water. It has become.
  • the volume of the ice making water tank 18 is set to be smaller than the amount of ice making water required for producing complete ice in the ice making unit 16 in one ice making operation (for example, 1 / of the amount of ice making water required). Set to 2 to 1/3). Accordingly, when the ice making water in the ice making water tank 18 is reduced to a predetermined amount during the ice making operation, room temperature water is additionally supplied as makeup water from an external water source (external water source) through a water supply pipe 38 to be described later. ing. The additional supply of makeup water performed in the ice making operation is performed a plurality of times (for example, 2 to 3 times).
  • a lower water level and an upper water level above the lower water level are set as ice making water levels.
  • the float switch 22 A detection signal is sent to a control means (described later) 24.
  • An ice guide plate 26 is provided between the ice making unit 16 and the ice making water tank 18, and ice blocks that have dropped from the ice making unit 16 during the deicing operation are guided by the ice guide plate 26 and released to an ice storage (not shown). It is like that.
  • the ice guide plate 26 is provided with a plurality of return holes (not shown), and ice-making water (non-freezing water) that has been supplied to the ice making unit 16 and has not been frozen is supplied to the ice making water tank through the return holes. 18 is collected.
  • the deicing water supplied to the ice making unit 16 in the deicing operation is also collected in the ice making water tank 18 through the return hole and used as ice making water in the next ice making operation.
  • An ice making water supply pipe 28 is led out from the bottom of the ice making water tank 18, and an ice making water pump 30 is provided in the supply pipe 28 to pump ice making water in the ice making water tank 18 to the ice making part 16. .
  • the ice making water supply pipe 28 is connected to an ice making water sprinkler (ice making water supply means) 32 extending above the ice making section 16, and the ice making water is supplied to the ice making section 16 through the ice making water sprinkler 32. Scattered to be supplied.
  • a deicing water sprinkler (deicing water supply means) 34 for supplying deicing water between the ice making plates 12 and 12 is disposed.
  • the deicing water sprinkler 34 is connected to an external water source, and normal temperature water is supplied as deicing water between the ice making plates 12 and 12 through the deicing water sprinkler 34.
  • the deicing water sprinkler 34 is provided with a deicing water valve 36, and the deicing water valve 36 opens and closes so that the supply of deicing water from the deicing water sprinkler 34 can be controlled.
  • the opening / closing control of the deicing water valve 36 is performed by the control means 24.
  • a water supply pipe 38 is led out from the same external water source as the deicing water sprinkler 34, and the open end of the water supply pipe 38 is opened above the inside of the ice making water tank 18. Then, when the ice making water in the ice making water tank 18 is reduced to a predetermined water level during the ice making operation, makeup water is supplied to the ice making water tank 18 through the water supply pipe 38.
  • the water supply pipe 38 is provided with a water supply valve (water supply means) 40, and the water supply to the ice making water tank 18 is controlled by opening and closing the water supply valve 40.
  • the opening / closing control of the water supply valve 40 is performed by the control means 24.
  • the control means 24 comprehensively controls the operation of the automatic ice making machine 10 and at the time of the ice making operation, the water supply method (hereinafter referred to as the water supply mode) determined based on the time when the deicing operation immediately before the ice making operation is completed.
  • the water supply valve 40 is controlled to open and close.
  • the control means 24, and deicing timer 42 the ice produced in the ice making unit 16 from the start of the deicing operation to time the deicing completion time T 1 of the up leaving a first delay for delaying the timing of the water supply stop And a delay timer 44 for measuring time.
  • the control unit 24, the deicing water longest deicing water longest supply time U 1 is the time supplied to the ice making unit 16 is previously set as a deicing reference elapsed time in a deicing operation.
  • the deicing timer 42 operates simultaneously with the start of the deicing operation, and stops when the measured temperature (temperature of the hot gas) of the temperature measuring device 20 reaches the deicing completion temperature (for example, about 9 ° C.). Te, so as to count the deicing completion time T 1.
  • the deicing completion time T 1 is long.
  • the temperature of the deicing water is if hot, de-icing is promoted deicing completion time T 1 is shortened.
  • the deicing completion time T 1 changes based on the temperature of the deicing water, and the temperature of the makeup water supplied from the same water source as the deicing water is indirectly measured by measuring the deicing completion time T 1. I can grasp it.
  • the deicing water longest supply time U 1 are those previously set in the control means 24 to limit the supply of deicing water from the viewpoint of energy saving and the like. Accordingly, the deicing operation, after a lapse of the deicing water longest supply time U 1, not deicing water is supplied at a subsequent deicing operation, so that by the deicing is performed only hot gas.
  • the deicing water longest supply time U 1 is determined when the deicing operation is performed using the deicing water at the reference temperature when the temperature of the deicing water is set to a predetermined reference temperature. This refers to the time required for the ice mass produced to be completely removed. For example, when the reference temperature is 10 ° C., the longest supply time of deicing water U 1 is about 6 minutes. Then, the control unit 24, the deicing completion time T 1 and deicing water longest supply time U 1 and by comparing determining determines the temperature level of the deicing water to the reference temperature, thereby deicing water and the same external The temperature of the makeup water supplied from the water source can be indirectly grasped.
  • the control unit 24 determines the amount of water supply to the cold hourly water, next In the ice making operation, the water supply valve 40 is controlled so as to supply water at a low temperature water supply amount (hereinafter referred to as a low temperature mode).
  • the deicing completion time T 1 is (higher than the temperature reference temperature deicing water) shorter if from deicing water longest supply time U 1, the control means 24, the water supply amount to the large hot hourly water than cold hourly water
  • the water supply valve 40 is controlled so as to supply water at the high temperature water supply amount in the next ice making operation (hereinafter referred to as a high temperature mode).
  • the deicing water reference temperature is set for each model of the automatic ice making machine 10, and the deicing water longest supply time U1 is determined according to the set value of the reference temperature.
  • the control means 24 opens the water supply valve 40 after the ice making water level in the ice making water tank 18 reaches the lower water level, and when the ice making water level reaches the upper water level, the water supply valve is opened. 40 is closed. That is, the low-temperature water supply amount is the amount of water supply until the ice-making water level in the ice-making water tank 18 reaches the upper water level from the lower water level (see FIG. 2).
  • the control means 24 opens the water supply valve 40 after the water level of the ice making water in the ice making water tank 18 reaches the lower water level, and the water level of the ice making water reaches the upper water level.
  • the water supply valve 40 is opened until the first delay time elapses. That is, when the ice making water level when the first delay time elapses is the delayed upper water level, the hot water supply amount is the amount of water supply until the ice making water level reaches the delayed upper water level from the lower water level (FIG. 2).
  • Example 1 the operation of the automatic ice making machine 10 according to the first embodiment will be described below.
  • the control unit 24 since the amount of water supply in the ice making operation control unit 24 determines based on the deicing completion time T 1 of the at deicing operation, the first ice-making operation that has not undergone deicing operation, the control means 24 cannot determine the amount of water supply. Therefore, in the first ice making operation, for example, it is assumed that the control unit 24 is set in advance to set the water supply amount to the low temperature water supply amount.
  • the control means 24 supplies hot gas to the evaporation pipe 14 and opens the deicing water valve 36.
  • the deicing water is supplied between the ice making plates 12 and 12 through the deicing water sprinkler 34 from an external water source.
  • deicing timer 42 in the control means 24 is actuated to start counting the deicing completion time T 1 (step S1).
  • the ice making unit 16 is heated by the hot gas and deicing water, and the ice blocks on the ice making plate 12 start to melt gradually.
  • the deicing operation proceeds, the ice blocks are peeled off from the ice making plate 12 and discharged to the ice storage via the ice guide plate 26.
  • the control unit 24, clocked time of the deicing timer 42 determines whether or not deicing water longest supply time U 1 or more (step S2). If the measured time of the deicing timer 42 is ice water longest supply time U 1 or more dividing (Yes in step S2), the control unit 24 stops the supply of the deicing water to close the deicing water valve 36 (Step S3). That is, the supply of further deicing water is stopped to reduce the consumption of deicing water, thereby reducing the running cost. The subsequent deicing operation is performed only by heating the ice making unit 16 with hot gas.
  • the control unit 24 determines whether or not the measured temperature of the temperature measuring device 20 has reached the deicing completion temperature (step S4), and the measured temperature of the temperature measuring device 20 has reached the deicing completion temperature. If (Yes in step S4), the control means 24 ends the deicing operation and stops the deicing timer 42 (step S5). Then, the control unit 24, by comparing the deicing completion time T 1 and the deicing water longest supply time U 1, since deicing completion time T 1 is is deicing water longest supply U 1 or more (step S6), and water The mode is determined as the low temperature mode (step S7). That is, since the temperature of the deicing water (make-up water) is lower than the reference temperature, the control means 24 determines to supply the make-up water at the low temperature water supply amount at the time of water supply in the next ice making operation.
  • step S2 if the measured time of the deicing timer 42 has not elapsed the deicing water longest supply time U 1 (No in step S2), the control means 24, the temperature measured by the temperature measuring instrument 20 is deicing completion It is determined whether or not the temperature has been reached (step S8). If the measured temperature of the temperature measuring device 20 has reached the deicing completion temperature (Yes in step S8), the control unit 24 ends the deicing operation and stops the deicing timer 42 (step S9).
  • the control unit 24 the deicing completion time T 1 deicing water longest supply time by comparing the U 1, since ⁇ ice completion time T 1 is less than the deicing water longest supply U 1 (step S10), and The water supply mode is determined as the high temperature mode (step S11). That is, since the temperature of the deicing water (make-up water) is high, the control means 24 determines to supply the make-up water at the high temperature water supply amount at the time of water supply in the next ice making operation.
  • the control unit 24 supplies the refrigerant to the evaporation pipe 14 and operates the ice making water pump 30 to circulate and supply ice making water to the ice making unit 16 (step S1). Then, the refrigerant flowing through the evaporation pipe 14 exchanges heat with the ice making plate 12, gradually cooling the ice making plate 12, and ice blocks start to be produced on the surface of the ice making plate 12.
  • step S3 the control means 24 opens the water supply valve 40 to supply additional ice water to the ice making water tank 18.
  • step S3 the ice making water pump 30 is operating even during water supply, and the ice making water in the ice making water tank 18 continues to be supplied to the ice making unit 16, but the amount of water supplied from the water supply pipe 38 is the ice making water to the ice making unit 16. The amount of ice-making water in the ice-making water tank 18 starts to rise.
  • step S4 When the ice making water level in the ice making water tank 18 reaches the upper water level (Yes in step S4), the float switch 22 detects this and sends a detection signal to the control means 24. Then, the control means 24 closes the water supply valve 40 and stops supply of makeup water. In other words, in the low temperature mode, makeup water having a low temperature water supply amount from the lower water level to the upper water level of the ice making water tank 18 is supplied during water supply (see FIG. 2). In the subsequent ice making operation, water supply in the low temperature mode is repeated each time the ice making water in the ice making water tank 18 reaches the sewage level. When ice blocks having a predetermined size are manufactured on the ice making plate 12 and the temperature measured by the temperature measuring device 20 reaches the ice making completion temperature, the control means 24 ends the ice making operation and shifts to the deicing operation.
  • the control unit 24 supplies the refrigerant to the evaporation pipe 14 and operates the ice making water pump 30 to circulate and supply ice making water to the ice making unit 16 (step S1). ).
  • the control means 24 opens the water supply valve 40 and starts supplying makeup water to the ice making water tank 18. (Step S3). Then, the water level of the ice making water in the ice making water tank 18 starts to rise.
  • step S5 When the ice making water level in the ice making water tank 18 reaches the upper water level (Yes in step S4), the float switch 22 detects this, and the control means 24 activates the delay timer 44 (step S5). That is, even if the ice making water level in the ice making water tank 18 reaches the upper water level, the water supply is continued without being stopped. Then, when the delay timer 44 measures the first delay time (for example, 3 seconds) (Yes in Step S6), the control unit 24 closes the water supply valve 40 to stop water supply. At this time, the ice making water level in the ice making water tank 18 has reached the delayed upper water level.
  • the delay timer 44 measures the first delay time (for example, 3 seconds)
  • the water supply time is extended by delaying the water supply stop timing by the first delay time in the high temperature mode, and the water supply amount at the high temperature is higher than the water supply at the low temperature. It becomes possible to supply makeup water. Accordingly, a large amount of makeup water supplied to the ice making water tank 18 is secured, and it is possible to prevent an insufficient supply of water and to manufacture ice blocks of an appropriate size when ice making is completed. Further, in the low temperature mode, makeup water is supplied by a low temperature water supply amount that is smaller than the high temperature water supply amount, so that it is possible to prevent a huge ice block from being produced in the ice making unit 16 due to excessive water supply.
  • Example 1 since the to determine the amount of water supply make-up water on the basis of the deicing completion time T 1 that varies with the temperature of the deicing water (makeup water), reflects accurately the temperature of the makeup water supply Water supply can be performed in an amount, and shortage of supply water and excessive water supply can be reliably prevented.
  • the water supply mode is not determined in the first deicing operation, and in the first ice making operation, water supply is performed at the low temperature water supply amount regardless of the temperature of the makeup water.
  • the control unit 24 may determine the water supply mode from the first deicing operation. That is, when the first deicing operation is started, the control unit 24 causes the counting of the deicing completion time T 1 by operating the deicing timer 42. Then, by comparing the deicing completion time T 1 and the deicing water longest supply time U 1, it may be determined the water supply mode. However, in the first deicing operation, since ice blocks are not manufactured in the ice making unit 16, the temperature measuring device 20 immediately measures the deicing completion temperature. Therefore, the control unit 24, the deicing completion time T 1 is so determined as shorter than the deicing water longest supply time U 1, in the first deicing operation, and thus the water supply mode that is determined always hot mode.
  • the water supply amount in the high temperature mode is ensured by delaying the timing of the water supply stop at the time of water supply.
  • the delay timer 44 built in the control means 24 operates when the water level of the ice making water in the ice making water tank 18 reaches the sewage level in the high temperature mode, and the second delay time (for example, 3 seconds). It is supposed to keep time.
  • the control means 24 is set so that the water supply valve 40 may be opened after the second delay time has elapsed to start water supply.
  • the water supply in the high temperature mode is started after the ice-making water reaches a lower water level (delayed lower water level) than the lower water level, as shown in FIG.
  • the control means 24 is set to stop water supply when the ice making water reaches the upper water level. That is, in the modified example, the hot water supply amount supplied in the high temperature mode is an amount until the ice making water level reaches the upper water level from the delayed lower water level.
  • the low temperature water supply amount supplied in the low temperature mode is set to an amount until the water level of the ice making water reaches the upper water level from the lower water level, as in the first embodiment.
  • the method for determining the water supply mode during deicing operation in the same manner as in Example 1, so as to determine by comparing the deicing completion time T 1 and the deicing water longest supply time U 1.
  • the control unit 24 supplies the refrigerant to the evaporation pipe 14 and operates the ice making water pump 30 to supply ice making water to the ice making unit 16.
  • the ice making operation is started (step S1).
  • the control means 24 activates the delay timer 44 to time the second delay time ( Step S3). Then, the ice making water in the ice making water tank 18 decreases until the second delay time elapses, and the ice making water level continues to fall.
  • Step S5 the control means 24 opens the water supply valve 40 and starts water supply (Step S5).
  • the ice-making water level in the ice-making water tank 18 has reached the delayed sewage level (see FIG. 6).
  • the makeup water is supplied to the ice making water tank 18, the water level of the ice making water in the ice making water tank 18 starts to rise, and the float switch 22 indicates that the ice making water level in the ice making water tank 18 has reached the upper water level. If it detects (Yes of step S6), the control means 24 will close the water supply valve 40, and will stop water supply (step S7).
  • the high-temperature water supply from the delayed sewage level to the high water level is supplied to the ice-making water tank 18 in the high-temperature mode.
  • a large amount of water supply can be secured. Therefore, shortage of water supply can be prevented, and production of ice blocks of an appropriate size can be produced when ice making is completed.
  • the water supply in the high temperature mode described above is repeated each time the ice making water level reaches the sewage level.
  • the temperature of the makeup water is low (low temperature mode)
  • the makeup water of the cold water supply amount from the lower water level to the upper water level of the ice making water tank 18 is supplied. Therefore, abnormal deicing due to excessive water supply and deformation / breakage of the ice making unit 16 are suppressed.
  • the start of water supply was delayed by the second delay time, and the water supply was stopped when the water level was reached.
  • the water supply method of the first embodiment is also possible to combine the water supply method of the first embodiment and the water supply method of the modified example. That is, the water supply is started after the second delay time has been detected and the stop of the water supply is further delayed by the first delay time after reaching the upper water level. Thereby, makeup water may be supplied from the delayed lower water level to the delayed upper water level, and more makeup water may be supplied to the ice making water tank 18.
  • Example 2 Next, an automatic ice making machine according to the second embodiment will be described.
  • the second embodiment only the configuration different from that in the first embodiment will be described.
  • the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.
  • the automatic ice making machine of Embodiment 2 the control means 24, deicing completion time during deicing operation T 1 and the minimum deicing time (deicing reference elapsed time) to determine the water supply mode by comparing determining and U 2 It is like that.
  • the minimum deicing time U 2 the time required for deicing water from the deicing operation is started is stored until the upper level in the ice-making water tank 18, the minimum deicing time at least deicing operation U Continues for two .
  • Minimum deicing time U 2 is determined by the flow rate of the deicing water supplied from the volume and deicing water sprinkler 34 of the ice making water tank 18, for example, the minimum deicing time U 2 is set to 2 minutes. Then, the temperature of the deicing water is low, the deicing progresses slowly deicing completion time T 1 the minimum deicing time U 2 above, the control means 24 determines the water mode to the low-temperature mode.
  • the control unit 24 determines the water mode to the high temperature mode.
  • the water supply method in the high temperature mode as shown in the first embodiment, a method of delaying the water supply time after detecting the upper water level (see FIG. 5), or as shown in a modified example of the first embodiment, A method of delaying the water supply start time after detecting the water level (see FIG. 7) can be employed. Further, the water supply method in the low temperature mode is the same as that in the first embodiment (see FIG. 4).
  • the control unit 24 supplies hot gas to the evaporation pipe 14 and opens the deicing water valve 36, so that the ice making unit 16 is connected via the deicing water sprinkler 34.
  • Deicing water is supplied from an external water source (step S1). Further, the control unit 24 causes the counting of the deicing completion time T 1 by operating the deicing timer 42.
  • the control means 24 determines whether or not the temperature measured by the temperature measuring device 20 is the deicing completion temperature (step S2).
  • step S6 if the measured temperature is deicing completion temperature of the temperature measuring device 20 (Yes in step S2), the control unit 24, the deicing timer 42 stops measuring the deicing completion time T 1 (step S3) . Then, the deicing completion time T 1 and the minimum deicing time U 2 Comparative judgment (step S4), and if the deicing completion time T 1 is the minimum deicing time U 2 or more (Yes in step S4), the control means 24 closes the deicing water valve 36 and stops the supply of hot gas to the evaporation pipe 14 to end the deicing operation (step S5). Then, since the deicing completion time T 1 is at the minimum deicing time U 2 above, the control unit 24 determines the water supply mode in the next ice-making operation to the low-temperature mode (step S6).
  • step S4 determines the water mode to the high-temperature mode. Then, the control unit 24 continues the deicing operation until after the minimum deicing time U 2 (step S8), and the deicing time has elapsed the minimum deicing time U 2 (Yes in step S8), and control means 24 terminates the deicing operation (step S9).
  • deicing water is stored to the upper water level ice-making water tank 18 is used as ice-making water in the next ice-making operation.
  • the supplementary water of the high-temperature water supply amount is supplied at the time of water supply, and the ice making capacity is not reduced due to insufficient water supply. Further, if the makeup water is at a low temperature, it is possible to prevent the production of a huge ice block due to excessive water supply by supplying the supplementary water at the low temperature.
  • Example 3 Next, an automatic ice maker according to Example 3 will be described below. Also in the third embodiment, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment is denoted by the same reference numeral and the description thereof is omitted.
  • FIG. 9 is an explanatory diagram illustrating an automatic ice making machine 48 according to the third embodiment.
  • the control unit 46 predetermined deicing reference elapsed time U 3 is set in advance to, in determining the water supply mode, the control unit 46, a and deicing completion time T 1 and deicing reference elapsed time U 3 Comparison judgment is made.
  • the deicing reference elapsed time U 3 when conducted the deicing operation in deicing water of a predetermined reference temperature, ice blocks of the ice making unit 16 refers to the time required for complete withdrawal. For example, when the reference temperature of the deicing water is 11 ° C., the deicing reference elapsed time U 3 is 5 minutes.
  • the control means 46 also makeup water As with the deicing water, it is determined that the temperature is low, and the water supply mode is determined to be the low temperature mode. On the other hand, when the temperature of the deicing water is hotter than the reference temperature, the deicing completion time T 1 is shorter than the deicing reference elapsed time U 3 deicing is accelerated, the control means 46, also makeup water similar to the deicing water The water supply mode is determined to be the high temperature mode.
  • the deicing water reference temperature is set for each model of the automatic ice making machine 48, and the deicing reference elapsed time U3 is determined according to the set reference temperature.
  • the water supply method in the high temperature mode is such that the water supply is continued until the first delay time elapses after the water level of the ice making water in the ice making water tank 18 reaches the upper water level at the time of water supply.
  • the first delay time as in Example 1 always constant time (e.g., 3 seconds) rather than with, so as to change the first delay time in response to the deicing completion time T 1 It has become. That is, the control unit 46 has a delay time calculation unit 50, the delay time calculation unit 50 is adapted to calculate a first delay time based on the deicing completion time T 1 of the deicing operation (See FIG. 12). Specifically, as shown in FIG.
  • the first delay time is set to 5 seconds, and the deicing completion time T 1 is 40 seconds to 5 minutes (300 seconds).
  • the first delay time is gradually decreased by 1 second every 52 seconds.
  • the first delay time deicing completion time T 1 is 92 seconds 4 seconds
  • the first delay time deicing completion time T 1 is at 144 seconds is 3 seconds.
  • the control unit 46 supplies hot gas to the evaporation pipe 14 and opens the deicing water valve 36 from the external water source via the deicing water sprinkler 34. Deicing water is supplied to the ice making unit 16 (step S1). Further, the control unit 46 operates the start and at the same time deicing timer 42 of deicing operation, to count the deicing completion time T 1. When the measured temperature of the temperature measuring device 20 reaches the deicing completion temperature (Yes in step S2), the control means 46 ends the deicing operation and stops the deicing timer 42 to complete the deicing completion time T. 1 is measured (step S3).
  • the control unit 46 determines whether or not deicing reference elapsed time U 3 or more (step S4), and the deicing completion time T 1 is deicing reference elapsed time U 3 or If there is (Yes in step S4), the control means 46 determines the water supply mode to the low temperature mode (step S5). On the other hand, if the deicing completion time T 1 is less than the deicing reference elapsed time U 3 (No in step S4), and the control means 46 determines the water mode to the high-temperature mode (step S6). Then, when the high temperature mode is determined, the delay time calculation unit 50 determines a first time delay from the deicing completion time T 1 (step S7). For example, if the deicing completion time T 1 is 92 seconds, the delay time calculation unit 50 determines a first delay time to 4 seconds.
  • the water supply mode and the first delay time are determined. And if it transfers to ice making operation
  • the automatic ice maker 48 of Example 3 by changing the first delay time in response to the deicing completion time T 1, as shown in FIG. 12, corresponding to the temperature of the makeup water (deicing water)
  • the appropriate high temperature water supply can be supplied. Therefore, it is possible to supply water more flexibly than when supplying a constant amount of water at a high temperature, and it is possible to more reliably prevent a decrease in ice making capacity due to insufficient water supply.
  • you can water an optimum water supply in the high temperature mode may in inexpensive running cost by preventing wasteful use of make-up water.
  • the makeup water is supplied in the low temperature mode by the amount of water supplied at the low temperature from the lower water level to the upper water level of the ice making water tank 18 at the time of water supply. Therefore, when the makeup water is at a low temperature, excessive water supply is prevented, and it is possible to suppress the occurrence of abnormal deicing and deformation / breakage of the ice making unit 16.
  • the first delay time in response to the deicing completion time T 1 was set to be changed stepwise by 1 second, proportionally in accordance with a first delay time deicing completion time T 1 It may be changed to (linear). In Example 3, it was to change the first delay time in response to the deicing completion time T 1, may be changed to the second delay time in response to the deicing completion time T 1.
  • Example 4 Next, the automatic ice making machine according to Embodiment 4 will be described below. Also in the fourth embodiment, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.
  • FIG. 13 is a schematic diagram illustrating an automatic ice making machine 52 according to the fourth embodiment.
  • the control means 56 according to the fourth embodiment determines the water supply mode during the ice making operation. That is, the control means 56, the deicing completion time instead of the deicing timer 42 for counting a T 1, and the reference temperature arrival time T 2 incorporates a ice timer 54 for counting.
  • the ice making reference elapsed time U 4 is set in advance in the control means 56 of the fourth embodiment, and the control means 56 determines the water supply mode when the reference temperature arrival time T 2 and the ice making reference elapsed time U 4 are determined. 4 is compared.
  • the reference temperature arrival time T 2 until it reaches the reference temperature outlet temperature of the ice making section 16 (measurement temperature of the temperature measuring device 20) is pre-set from the start of the ice-making operation in the evaporation tube 14 The time required for.
  • This reference temperature refers to the temperature on the outlet side of the ice making unit 16 when the ice making operation proceeds to some extent and the ice making water and the ice making unit 16 are cooled and the ice making unit 16 begins to produce ice blocks.
  • the ice making water in the ice making water tank 18 when the ice making operation is started is the water supplied as the deicing water from the external water source during the deicing operation, so if the temperature of the ice making water is high, It takes time for the ice making water to cool. Therefore, if the ice making water is at a high temperature, it takes time until the temperature of the refrigerant on the outlet side of the ice making unit 16 decreases, and the reference temperature arrival time T 2 at which the temperature measured by the temperature measuring device 20 reaches the reference temperature is: become longer.
  • the time required for cooling the ice making water is shortened and the refrigerant temperature on the outlet side of the ice making unit 16 is lowered. even faster, the reference temperature arrival time T 2 are shortened.
  • the ice making reference elapsed time U 4 is the temperature measuring device 20 that reaches the reference temperature when the ice making operation is started in a state where ice making water having a predetermined reference temperature is stored in the ice making water tank 18. The time it takes to complete. For example, when the standard temperature of ice making water is 10 ° C. and the reference temperature is 2 ° C., the ice making standard elapsed time U 4 is 3 minutes. If the actual temperature of the ice making water is higher than the reference temperature, the reference temperature arrival time T 2 becomes longer than the ice making reference elapsed time U 4 , so that the control means 56 uses the same external as ice making water (deicing water).
  • the control means 56 uses the same external water source as the ice making water (deicing water). It is determined that the temperature of the makeup water is also low, and the water supply mode is determined to be the low temperature mode.
  • the standard temperature and reference temperature of ice making water are set for each model of the automatic ice making machine 52, and the ice making standard elapsed time U4 is determined based on the standard temperature and the reference temperature.
  • the water supply method in the high temperature mode is configured to start water supply after the second delay time has elapsed after the water level of the ice making water in the ice making water tank 18 reaches the sewage level.
  • a second delay time e.g., 3 seconds
  • the reference temperature arrival time T 2 Accordingly, the second delay time is changed. That is, the control unit 56 has a delay time calculation unit 58, the delay time calculating unit 58 based on the reference temperature arrival time T 2 calculates the second delay time. For example, as shown in FIG.
  • the reference temperature arrival time T 2 when the reference temperature arrival time T 2 is 3 minutes or less and the second delay time is 0 second, the reference temperature arrival time T 2 is between 2 minutes and 10 minutes, and is changed every 84 seconds.
  • the delay time is gradually increased by 1 second, and 10 minutes or more is set to 5 seconds. Therefore, when the reference temperature arrival time T 2 is 4 minutes 24 seconds, the second delay time is 1 second, reference temperature arrival time T 2 is the time of 5 minutes 48 seconds, the second delay time is 2 seconds.
  • the control means 56 supplies the refrigerant to the evaporation pipe 14 and operates the ice making water pump 30 to circulate and supply the ice making water to the ice making unit 16 (step S1). .
  • the ice timer 54 by operating the ice timer 54 to count the reference temperature arrival time T 2.
  • the ice making water supplied to the ice making water tank 18 during the deicing operation has a high temperature in the initial stage of the ice making operation, and is cooled while being circulated and supplied to the ice making unit 16. Accordingly, the temperature on the outlet side of the ice making section 16 in the evaporation pipe 14 (measured temperature of the temperature measuring device 20) increases according to the temperature of the ice making water at the start of the ice making operation.
  • the temperature measured by the temperature measuring device 20 also decreases.
  • the control unit 56 the ice-making timer 54 is stopped to measure the reference temperature arrival time T 2 in (step S3 ). Then, by comparing the reference temperature arrival time T 2 and the ice making reference elapsed time U 4 (step S4), and if the reference temperature arrival time T 2 has ice making reference elapsed time U 4 or less (Yes in step S4), the control means 56 determines the water supply mode to the low temperature mode (step S5).
  • step S6 determines the water mode to the high-temperature mode
  • step S7 determines the second delay time
  • step S7 calculates the second delay time in response to the reference temperature arrival time T 2. For example, if the reference temperature arrival time T 2 is 5 minutes 24 seconds, the delay time calculation unit 58 sets the second delay time to 2 seconds.
  • Example 4 the water supply mode is determined during the ice making operation, and the ice making operation is continued as it is.
  • the float switch 22 detects this, and the control means 56 activates the delay timer 44.
  • the control unit 56 opens the water supply valve 40 and starts water supply.
  • the ice making water level at this time is a delayed sewage level.
  • the control unit 56 closes the water supply valve 40 to stop the water supply.
  • the water supply start timing is delayed by the second delay time calculated by the delay time calculation unit 58, so that water can be supplied at a high temperature water supply amount from the delayed lower water level to the upper water level.
  • the second delay time is set to an appropriate value according to the reference temperature arrival time T 2 (ice-making water temperature)
  • the second delay time is more flexible than the case of always supplying a constant high-temperature water supply amount. Water can be supplied (see FIG. 16). Therefore, wasteful water supply in the high-temperature mode can be eliminated and the running cost can be reduced, and the ice making capacity is not reduced due to insufficient water supply.
  • the second delay time is changed stepwise by 1 second according to the reference temperature arrival time T 2.
  • the second delay time is proportional (linear) according to the reference temperature arrival time T 2. May be changed.
  • Example 4 it was to change the second delay time, as in Example 3, it is also possible to modify the first delay time in response to the reference temperature arrival time T 2.
  • the flow-down type automatic ice making machine has been described.
  • a closed cell type or open cell type automatic ice making machine or the like is employed. It is possible.
  • the automatic ice making machine is not limited to the above-described embodiments and modifications, and the following modifications are possible.
  • the water supply amount (high temperature water supply amount and low temperature water supply amount) is controlled based on the water level detection of the float switch at the time of water supply.
  • the water supply amount may be controlled by the water supply time. Good.
  • the water supply valve may be opened for 10 seconds when the water supply amount is high, and the water supply valve may be opened for 8 seconds when the water supply amount is low.
  • the deicing operation is completed by a sensor that detects the presence or absence of ice on the ice making unit. May be detected.
  • the completion of the ice making operation is also detected at the temperature measured by the temperature measuring device. For example, the ice making operation is completed when the float switch detects the sewage level a predetermined number of times. May be. That is, the completion of the ice making operation may be determined by the number of times of water supply.
  • the low temperature water supply amount is always supplied from the lower water level to the upper water level.
  • the low temperature water supply amount is also changed according to the temperature of the makeup water. May be.
  • the external water source is exemplified as the external water source.
  • makeup water or deicing water may be supplied from a reservoir tank that stores a predetermined amount of water. That is, any external water source may be used as long as the temperature of the makeup water supplied depending on the installation environment of the automatic ice maker changes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Production, Working, Storing, Or Distribution Of Ice (AREA)
PCT/JP2009/069575 2009-03-25 2009-11-18 自動製氷機 Ceased WO2010109724A1 (ja)

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US13/201,207 US9146049B2 (en) 2009-03-25 2009-11-18 Automatic ice making machine
EP09842334.6A EP2413070B1 (en) 2009-03-25 2009-11-18 Automatic ice maker
CN2009801579663A CN102348946B (zh) 2009-03-25 2009-11-18 自动制冰机

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EP2413070B1 (en) 2014-04-16
EP2413070A4 (en) 2013-01-09
JP2010230177A (ja) 2010-10-14
US9146049B2 (en) 2015-09-29
US20120000226A1 (en) 2012-01-05
CN102348946A (zh) 2012-02-08
EP2413070A1 (en) 2012-02-01
JP5198337B2 (ja) 2013-05-15
CN102348946B (zh) 2013-08-28

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