KR20120022505A - Freezer - Google Patents

Abstract

PURPOSE: A freezer is provided to uniformly supply cold air and reduce an energy loss because a freezer is cooled through performing a cooling mode by a control unit controlling an operation of cooling and ultrasonic devices. CONSTITUTION: A freezer comprises a freezer(8), a cooling device(3), an ultrasonic device(4), and a control unit. The cooling device cools the freezer. The ultrasonic radiates the ultrasonic wave to the freezer. The control unit controls operations of the cooling and ultrasonic devices. The control unit has a normal cooling mode operating the cooling device without operating the ultrasonic and a rapid cooling mode operating the cooling and ultrasonic devices. The control unit performs the rapid cooling mode after cooling the freezer by performing the normal cooling mode.

Description

Freezer {FREEZER}

The present invention relates to a freezer comprising a cooling device for cooling the freezing chamber and an ultrasonic device for radiating ultrasonic waves in the freezing chamber.

A freezer having a freezer compartment for receiving an object to be frozen and having a cooling device for cooling the freezer compartment is conventionally known. However, the freezer has been improved, and an ultrasonic apparatus for radiating ultrasonic waves in the freezer compartment has been provided, and the target object can be more efficiently. The freezer shown in patent document 1 to freeze is known.

[Prior Art Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 2007-195493

In the freezer of the above document, depending on the situation, the object can be cooled efficiently by the radiation of ultrasonic waves, and the object can not be cooled efficiently even by ultrasonic waves. The energy for radiating the ultrasonic wave to operate the ultrasonic device may be wasted in some cases.

The present invention provides a freezer comprising a freezer compartment for storing an object to be frozen, a cooling apparatus for cooling the freezer compartment, and an ultrasonic apparatus for radiating ultrasonic waves in the freezer compartment, by efficiently controlling the timing of radiating ultrasonic waves. An object of the present invention is to provide a freezer that can cool an object.

In order to solve the said subject, 1st this invention forms the freezing chamber 8 which accommodates the object to be refrigerated, and radiates an ultrasonic wave to the cooling apparatus 3 which cools the freezing chamber 8, and the freezing chamber 8. A freezer for freezing an object, comprising an ultrasonic device 4 for controlling an operation of the cooling device 3, and a control unit 34 for controlling the operation of the ultrasonic device 4. 34 has a normal cooling mode in which the cooling device 3 is operated without operating the ultrasonic device 4, and a rapid cooling mode in which the ultrasonic device 4 and the cooling device 3 are operated. The control unit 34 is configured to execute the rapid cooling mode after the freezing chamber 8 is cooled by executing.

Secondly, freezing detecting means 37 for detecting that the object has been frozen is provided, and the control section 34 detects that the object has been frozen by the freezing detecting means 37 during the execution of the rapid cooling mode. In this case, the rapid cooling mode is terminated by stopping the operation of the ultrasonic apparatus 4.

Third, the opening and closing detection means 38 which detects the opening and closing of the freezing compartment 8 is provided, and the control part 34 performs the opening and closing detection means 38 by the opening and closing detection means 38 during execution of the rapid cooling mode. When it detects that it is in an open state, it is characterized by stopping the operation | movement of the ultrasonic apparatus 4, It is characterized by the above-mentioned.

Fourthly, the controller 34 stops the operation of the ultrasonic apparatus 4 during the execution of the rapid cooling mode, and then detects the closed state of the freezer compartment 8 by the opening / closing detecting means 38. It is characterized by operating the ultrasonic apparatus 4.

Fifthly, when the electric field device 6 which generates an electric field in the freezer compartment 8 is provided so that operation control is possible by the control part 34, and the control part 34 implements at least a rapid cooling mode, an electric field is carried out. An electric field is formed in the freezer compartment 8 by the apparatus 6.

Sixthly, the control part 34 is comprised so that an electric field may be formed in the freezer compartment 8 by the electric field apparatus 6, even during normal cooling mode.

Seventh, when the opening / closing detection means 38 which detects the opening / closing of the freezer compartment 8 is provided, and the control part 34 detects that the freezing compartment 8 is open by the said opening / closing detection means 38, it is. Is characterized in that the operation of the electric field device 6 is stopped.

Eighthly, after stopping the operation of the electric device 6, the control unit 34 detects the closed state of the freezer compartment 8 by the opening / closing detecting means 38. It is characterized by operating again.

9th, the rack 19 which an object can support, and which carry-in / out of the freezer compartment 8 can carry out is comprised by the metal member which can supply electricity, and the rack 19 is connected with respect to the inner wall 1b of the freezer compartment 8, and The insulator 27 which insulates is provided, one of the pair of electrodes 17A, 17B which the electric field apparatus 6 has is formed in the rack 19 side, and the other is provided in the inner wall 1b of the freezer compartment 8. It is characterized by forming.

10thly, when the rack 19 is carried in the freezer compartment 8, the connection apparatus 21 which contacts and electrically connected with the said rack 19 is provided, and the said connection apparatus 21 and the freezer compartment 8 are provided. The electric field apparatus 6 is comprised so that a voltage may be applied between the inner walls 1b of the.

According to the above configuration, by controlling the operation of the cooling apparatus and controlling the operation of the ultrasonic apparatus, by executing the normal cooling mode to cool the freezer compartment, the rapid cooling mode of operating the ultrasonic waves is executed. Ultrasonic waves are radiated to the freezing chamber in a moderately cooled state, whereby the cold air is made uniform, the loss of energy is reduced, and the object can be cooled efficiently.

Further, freezing detection means for detecting that the object has been frozen is provided, and the control unit stops the operation of the ultrasonic apparatus by rapidly stopping the operation of the ultrasonic apparatus when the freezing detection means detects that the object has been frozen. Since the cooling mode is terminated, even after the object is frozen and long term storage is enabled, the ultrasonic device is operated unnecessarily and loss of energy is prevented.

Moreover, the opening-and-closing detection means which detects the opening / closing of a freezer compartment is provided, and when a control part detects that the freezer compartment is opened by the said opening / closing detection means during execution of a quick cooling mode, it stops operation | movement of an ultrasonic apparatus. In the state where the freezer compartment is opened and efficient cooling cannot be performed, the ultrasonic apparatus can be prevented from operating and energy loss.

In addition, when the control unit stops the operation of the ultrasonic apparatus during the execution of the rapid cooling mode and detects the closed state of the freezer compartment by the opening / closing detecting means, the control unit operates the ultrasonic apparatus. It can be reactivated, and the object can be cooled efficiently.

In addition, when the electric field device which generates an electric field in a freezer compartment is provided so that operation control is possible by a control part, and a control part forms an electric field in a freezer compartment by an electric field device at least, when executing a quick cooling mode, it is based on the said electric field. As a result, the object can be cooled more efficiently.

In addition, if the controller is configured to form an electric field in the freezer compartment by the electric field device even during the normal cooling mode, the freezer compartment can be cooled quickly by the electric field.

Moreover, since the opening-and-closing detection means which detects the opening and closing of a freezer compartment is provided, and a control part detects that the freezer compartment is open by the said opening-and-closing detection means, since the operation | movement of an electric field apparatus is stopped, a freezer compartment is opened and efficient In a state in which cooling cannot be performed, the electric field device can be prevented from operating and energy loss.

On the other hand, when the control unit stops the operation of the electric field device and then detects the closed state of the freezer compartment by the opening / closing detection means, the electric field device is operated again, so that the ultrasonic device is quickly reactivated at an appropriate timing. The object can be cooled efficiently.

Moreover, the rack which can support an object and can carry in / out from a freezer compartment is comprised by the metal member which can carry electricity, and provides the insulator which insulates a rack with respect to the inner wall of a freezer compartment, and has one pair of electrodes which an electric field apparatus has. Is formed on the rack side, the other is formed on the inner wall of the freezer compartment, and when the rack is brought into the freezer compartment, a connecting device is provided in contact with the rack and electrically connected therebetween, and between the connecting device and the inner wall of the freezer compartment. When the electric field device is configured to apply a voltage, an electric field can be formed in the freezer compartment easily and quickly, further improving convenience.

1 is a front view showing the configuration of a freezer to which the present invention is applied.
Figure 2 is a side cross-sectional view showing the configuration of a freezer to which the present invention is applied.
3 is a partial cross-sectional view of the rack.
4 is a side view of the connecting device.
5 is a block diagram of a control device.
6 is a flow chart showing a processing procedure of a control unit.
7 is a flow chart showing a processing procedure of a subroutine in the normal cooling mode.
8 is a flow chart showing a processing sequence of a subroutine in the rapid cooling mode.
9 is a flowchart showing a processing procedure of a subroutine in cryopreservation mode.

1 and 2 are front and side cross-sectional views showing the configuration of a freezer to which the present invention is applied. The freezer includes a main body 1 molded into a rectangular box shape, a base 2 on which the main body 1 is placed, a cooling device 3, an ultrasonic device 4, and an electric field device 6 ) And a control device 7.

In addition to the freezing chamber 8 formed inside the main body 1, an opening opening 1a for opening the freezing chamber 8 is formed on the front surface of the main body 1, and the freezing opening 8a is used to freeze the opening 1a. The freezer is configured to enter and exit an object such as fresh food. Incidentally, in the illustrated example, the size of the main body 1 is set to a size of about 1800 mm in length, 1800 mm in width, and about 2500 mm in height.

This opening 1a is arrange | positioned so that the transverse one side (right side in FIG. 1) half part (cooling space 8a) of the freezer compartment 8 may be opened, and this opening opening 1a will be seen from a front view. Is opened and closed freely by the opening / closing door 9. Specifically, the opening / closing door 9 is supported by the main body 1 so as to be able to rotate horizontally by a hinge portion (not shown) provided at the left and right one end portions of the opening / closing door 9. By the horizontal rotation, the opening / closing door 9 is configured to be switchable to a closed posture to close the opening 1a and an open posture to open the opening 1a. In addition, the locking mechanism which locks the opening / closing door 9 in a closed position is provided.

The base 2 is a rectangular plate-shaped member made of an insulator, and the main body 1 is placed and fixed on the upper surface side of the base 2, whereby the electrical connection between the main body 1 and the ground is prevented. Is blocked.

The said cooling device 3 is mainly comprised by the outdoor unit 11 provided in the outer wall side of the main body 1, and a pair of upper and lower coolers 12 and 13 arrange | positioned at the freezer compartment 8. A compressor and a condenser not shown are arranged on the outdoor unit 11 side, and an evaporator (not shown) is arranged on the cooler 12, 13 side.

The vaporized refrigerant is liquefied by a condenser after being compressed by a compressor, and the liquefied refrigerant is vaporized by an evaporator, and returned to the compressor again. Hereinafter, a capacitor → an evaporator → a compressor → a capacitor →. The circulation of is repeated, and during this circulation, the air in the coolers 12 and 13 is cooled by the endotherm by the heat of vaporization on the evaporator side.

The pair of coolers 12 and 13 are disposed in the half portion on the opposite side to the cooling space 8a in the freezer compartment 8, and more specifically, the lower cooler 12 includes a blower fan. While it becomes a blow side cooling machine provided with (12a), the cooler 13 of an upper side becomes a blow side cooling machine provided with the blower fan 13a.

The air in the freezer compartment 8 is blown into the blower-side cooler 12 by the blower fan 12a, and flows into the blower-side cooler 13 while being cooled by the cooling by the above-described heat of vaporization. The air which flowed into the blower-side cooler 13 is blown out to the cooling space 8a by the blower fan 13a, flows below the cooling space 8a, and returns to the blower fan 12a side again. Hereinafter, the blow side cooler 12 → the blow side cooler 13 → the cooling space 8a → the blow side cooler 12 →. In this order, the air is cooled.

The ultrasonic apparatus 4 includes an oscillator 14 for generating an electric high frequency, a vibrator (not shown) that vibrates ultrasonically by the high frequency from the oscillator 14, and a horn 16 for increasing the amplitude of the vibrator. ). The horn 16 is provided on the ceiling side of the cooling space 8a in the freezing chamber 8 and is configured to radiate ultrasonic waves toward the lower side. Incidentally, in the illustrated example, an AC voltage (specifically, an AC voltage having a frequency of 50 to 60 Hz and a running value of 100 V) is used as the power source of the ultrasonic apparatus 4, and the output is 150w. The frequency is set at 28 kHz.

The electric field device 6 includes a pair of electrodes 17A and 17B and a voltage generator 18 for generating a voltage applied to the pair of electrodes 17A and 17B.

The voltage generator 18 is configured to transform an alternating voltage used in a household general into a high voltage having a predetermined frequency by a transformer or the like, and the voltage generated specifically has a frequency of 500 Hz or more (more preferably 1000 Hz). The execution value of the voltage is set to 500 to 1500V. In addition, in some cases, the voltage generator 18 may generate a DC voltage.

One of the pair of electrodes 17A and 17B is formed on the inner wall 1b of the main body 1 forming the freezing chamber 8, and the other is formed on the rack 19 that can be accommodated in the freezing chamber 8. have. Specifically, the inner wall 1b of the freezing chamber 8 is constituted by a metallic member capable of supplying electricity, and the inner wall 1b and the voltage generator 18 are electrically connected to each other while the rack is mounted and supported. The metal rack 19 and the voltage generator 18 are comprised electrically by the metal member which can supply electricity, and are electrically connectable through the connection device 21. As shown in FIG.

3 is a partial cross-sectional view of the rack. As shown in FIG. 1 and FIG. 3, the rack 19 is a metallic frame made of a rectangular parallelepiped frame which is placed and fixed to a trolley 23 with a caster 22, and the front, rear, left and right sides are opened. (24) and a plurality of upper and lower loading shelves (26) provided in upper and lower spaces in the frame (24), and the overall size including the cart (23) and the rack (19) is an opening (1a). It is set to the magnitude | size which can carry in / out of the freezer compartment 8 through.

The trolley | bogie 23 is the square-shaped movable stand which mounts the frame 24 on the upper surface side, and the casters 22 are provided in the four corners of the movable stand, respectively. Between the trolley | bogie 23 and the edge 24, the insulator 27 which electrically cuts both is interposed. Incidentally, due to the configuration, the insulator 27 also blocks the electrical connection between the rack 19 and the inner wall 1b of the freezer compartment 8, and the rack 19 by the cart 23. Becomes a movable rack.

Each stacking shelf 26 is a plate-like member made of an electrically conductive metal net, and is slidably inserted between the support pieces 28 and 28 made of metal respectively provided at both ends in the transverse direction in the frame 24. By the support pieces 28 and 28 of this, engagement is carried out so that it can be enclosed. Specifically, the pair of support pieces 28 and 28 are angled members that are bent to the side and the upper side adjacent to each other and extend in the slide direction, and are arranged on the upper surface side of the pair of support pieces 28 and 28. A pair of opposing edge parts of the loading shelf 26 along the slide direction is mounted, respectively. By this mounting, the frame 24, the support pieces 28 and 28, and the loading shelf 26 are electrically connected.

Incidentally, since the loading shelf 26 is a mesh member as described above and a certain degree of ventilation is secured, it is prevented to prevent the flow of cooled air downward, but the amount of the object to be frozen is small. One or more of the plurality of loading shelves 26 may be removed to improve ventilation.

4 is a side view of the connecting device. The connecting device 21 includes a support frame 29 in which the transverse direction extends, a connecting terminal portion 32 in the transverse direction supported by the support frame 29 so as to be movable in a movable manner through a plurality of support arms 31, and a support. It consists of the some fixture 33 which attaches and fixes the frame 29 to the ceiling side of the cooling space 8a. Each fastener 33 formed in a columnar shape extending in the vertical direction is opened between the support frame 29 and the ceiling surface of the cooling space 8a, thereby opening up the ceiling surface of the freezer compartment 8. The inner wall 1b and the connection terminal part 32 which are contained are electrically cut off.

This connecting terminal portion 32 is electrically connected to the voltage generator 18 and is biased downward by an elastic member (not shown). By the above structure, when the entire rack 19 is carried into the cooling space 8a through the opening 1a, the connection terminal part 32 is pressed to the upper surface of the rack 19, and the connection terminal part 32 And the rack 19 are electrically connected to each other, and in the case where the entire rack 19 is carried out from the cooling space 8a to the outside through the opening 1a, the rack 19 and the connection terminal portion 32 The contact is released and both are electrically cut.

That is, the voltage generator 18 is configured to apply a voltage between the inner wall 1b of the freezer compartment 8 and the connection device 21, and is connected to the connection device 21 and the rack 19. This makes it possible to apply the voltage generated by the voltage generator 18 between the pair of electrodes 17A and 17B. Moreover, when the rack 19 is carried in to the cooling space 8a, it will be in the state which the horn 16 is located immediately above the rack 19. As shown to FIG.

The said control apparatus 7 is provided in the side in which the opening 1a of the front side of the main body 1 is not formed. This control apparatus 7 is provided with the control part 34 (refer FIG. 5) based on the control base which has a microcomputer etc.

5 is a block diagram of the control device. On the input side of the control part 34, the temperature sensor (room temperature detection means) 36 which detected the temperature of the freezer compartment 8, and the temperature of the target object supported by the rack 19 of the freezer compartment 8 are carried out. A product temperature sensor (object temperature detecting means, freezing detecting means) 37 formed of an infrared sensor to detect, etc., an opening / closing sensor (opening / closing detecting means) 38 for detecting opening and closing of the opening / closing door 9, Receiving sensor (import detection means) 39 which detects whether the rack 19 which supported the object was received in the cooling space 8a of the freezer compartment 8, a touch panel etc. which input various information, etc. The information input means 41 which consists of these is connected.

In addition, the opening / closing sensor 38 consists of a potentiometer which detects the rotation angle of an opening / closing door, or the touch sensor which detects the said closed position by contact with the opening / closing door 9, etc. The wearing sensor 39 is made of a potentiometer or the like which detects the swing angle of the support arm 31 of the connecting device 21, and the rack 19 comes into contact with the connecting terminal portion 32 to freeze. It is comprised so that detection of what was put into the space 8a from the change of the swing angle of the support arm 31 is possible. In addition, you may comprise this carry-in detection means by the above-mentioned temperature sensor 37 instead of the wearing sensor 39.

In addition, in addition to selecting which of the "manual" or "auto" is performed by the control part 34 by the input operation via the information input means 41, the freezer compartment used at the time of execution of a "manual" control ( Set the room temperature manual installation value (x1) and cooling time manual installation value (y1) of 8). In addition, it is also possible to input the kind etc. of the object to be frozen through the information input means 41.

On the output side of the control part 34, a cooling circuit (cooling control means) 42 for controlling the operation of the cooling device 3 and an ultrasonic circuit (ultrasound control means) for controlling the operation of the ultrasonic device 4 ( 43, an electric field circuit (electric field control means) 44 for controlling the operation of the electric field device 6, a display lamp 46 for performing status display, etc., and a notification for giving various notifications by a buzzer or sound. The apparatus (notification means) 47 is connected. In other words, the control unit 34 has a function of controlling the operation of the cooling device 3, a function of controlling the operation of the ultrasonic device 4, and a function of controlling the operation of the electric field device 6.

Incidentally, the display lamp 46 is configured such that the current mode is any of a normal cooling mode, a rapid cooling mode, and a cryopreservation mode which will be described later, depending on the lighting state thereof. The state is also comprised so that an operator can grasp from the lighting state.

6 is a flowchart illustrating a processing procedure of the control unit. When the power supply of the freezer is turned on (ON), the control unit 34 proceeds to step S1. In step S1, the subroutine of normal cooling mode is executed, and when this is complete | finished, a process progresses to step S2. In step S2, the subroutine in the rapid cooling mode is executed, and when this is finished, the process proceeds to step S3. In step S3, the subroutine in the cryopreservation mode is executed, and when this is finished, the process returns to step S1.

Fig. 7 is a flowchart showing the processing procedure of the subroutine in the normal cooling mode. When the normal cooling mode processing starts, the process proceeds to step S11. In step S11, it is detected in which of "manual" and "auto" the control is performed, and when control is performed by "manual", it progresses to step S12. In step S12, the read room temperature manual setting value x1 is set as target room temperature X, and it progresses to step S13. On the other hand, when control is performed with "auto" in step S11, it progresses to step S14. In step S14, the calculated room temperature arithmetic value x2 is set to the target room temperature X, and the flow proceeds to step S13. Incidentally, the target room temperature (X) is set in the range of approximately -30 ° C to -15 ° C by any of the room temperature calculation value (x2) and the room temperature manual setting value (x1).

In step S13, opening / closing of the opening / closing door 9 is detected by the opening / closing sensor 38, and when the closing posture of the opening / closing door 9 is detected, the flow proceeds to step S15. In step S15, while operating the cooling device 3 and the electric field apparatus 6, the operation | movement of the ultrasonic apparatus 4 is stopped, the freezer compartment 8 is used together and an electric field is cooled efficiently, and it progresses to step S16. do.

In step S16, the room temperature of the freezer compartment 8 is detected by the room temperature sensor 36, and it is judged whether or not the detected room temperature is equal to or less than the target room temperature X, and the room temperature of the freezer compartment 8 is If the target room temperature (X) or less is reached, the subroutine is terminated, the process is returned to the main routine shown in FIG. 6, and if the room temperature of the freezer compartment 8 is higher than the target room temperature (X), step S13. To reverse the process.

In step S13, when it is detected that the open / close door 9 is open (not closed position), the flow proceeds to step S17. In step S17, while operating the cooling device 3, the operation | movement of the ultrasonic apparatus 4 and the electric field apparatus 6 is stopped, and it progresses to step S18. In step S18, the notification device 47 notifies that the open / close door 9 is in an open state, and the process proceeds to step S16.

That is, during the normal cooling mode, when the open / close door 9 is opened and the freezer compartment 8 is in an open state, the operation of the electric field device 6 is stopped. After that, if the open / close door 9 is closed while the freezer compartment 8 is closed while the normal cooling mode is being executed, the process proceeds from step S17 to step S18 to step S13 to step S15 to again. , The electric field device 6 is operated.

8 is a flowchart showing a processing procedure of a subroutine in the rapid cooling mode. When the processing of the rapid cooling mode starts, the process proceeds to step S21. In step S21, whether the object is carried into the freezer compartment 8 via the rack 19 is detected by the wearing sensor 39, and when not carried out, it progresses to step S22. In step S22, the notification device 47 notifies that the object is not received in the freezer compartment 8, and returns the process to step S21. That is, the process of step S21-> step S22 is repeated, and it becomes the standby state by which execution of the quick cooling mode was stopped until the object is put into the freezer.

In step S21, when it is detected that the object is carried in the freezer compartment 8, it progresses to step S23. In step S23, it is detected in which of "manual" and "auto" is executed, and when control is performed by "manual", it progresses to step S24 and control is performed by "odo" If yes, the flow proceeds to step S25.

In step S24, the timer in the control part 34 is reset (returned to zero), a flag is set to ON, and it progresses to step S26. In step S26, the freezing time Y is set to the above-mentioned cooling time manual installation value y1, a timer is started by starting a timer, and the flow proceeds to step S27. On the other hand, in step S25, the flag is set to OFF, and the flow advances to step S27.

In step S27, opening / closing of the opening / closing door 9 is detected by the opening / closing sensor 38, and when the closing posture of the opening / closing door 9 is detected, the flow proceeds to step S28. In step S28, the cooling device 3, the ultrasonic device 4, and the electric field device 6 are all operated, and it progresses to step S29.

In step 27, when it is detected that the open / close door 9 is open, the process proceeds to step S30. In step S30, while operating the cooling device 3, the operation | movement of the ultrasonic apparatus 4 and the electric field apparatus 6 is stopped, and it progresses to step S31. In step S31, the notification device 47 notifies that the open / close door 9 is in an open state, and the process proceeds to step S29.

In step S29, the flag is detected, when the flag is ON (when control is executed in "manual"), the flow advances to step S32, and when the flag is OFF (control is executed in "auto") If yes), the flow proceeds to step S33.

In step S33, by detecting the temperature of the object by the temperature sensor 37, it is detected whether the object is frozen. If the object is frozen, the subroutine is terminated, and the process is shown in FIG. If the freezing of the object is not yet completed, the process returns to step S27. That is, in the "auto" control, the completion of freezing is detected by feeding back the temperature of the object, and the quick freezing mode is terminated by the completion of the freezing.

In step S32, it is detected whether or not the above-mentioned freezing time Y has elapsed from the start of counting by the timer. If the freezing time Y has elapsed since the start, the subroutine ends, and the process is performed. While returning to the main routine shown in FIG. 6, if the freezing time Y has not yet elapsed from the beginning, the process returns to step S27. That is, in the "manual" control, the freezing is completed by the passage of time of the set cooling time manual setting value y1, and the quick freezing mode is terminated by this freezing completion.

According to the subroutine of the rapid cooling mode of the above configuration, in the process of step S28, the object stored in the freezer compartment 8 sufficiently cooled by the normal cooling mode is efficiently and quickly cooled by the combination of the electric field and the ultrasonic wave. In this state, the freezing is performed in a state where the temperature of the object stays in the region of maximum freezing formation temperature as much as possible. Therefore, coarsening of freezing tablets in the object is prevented, and cell destruction during freezing is prevented. This can be suppressed and it is possible to freeze and store the object for a long time with high leadness.

In addition, by the process of step S21, in the state in which the object is not carried in the freezer compartment 8, the rapid cooling mode is executed (the ultrasonic device 4 and the electric field device 6 are operated), and no energy is consumed. Is prevented.

Moreover, in the midst of performing the subroutine of the rapid cooling mode in "auto", when the freezing of an object is detected by the temperature sensor 37 in step S33, this subroutine is complete | finished and the cryopreservation mentioned later is mentioned. Since the operation of the ultrasonic apparatus 4 is stopped by the mode, the ultrasonic apparatus 4 continues to generate ultrasonic waves even after the object freezes, and it is prevented that energy consumption is not necessary.

In addition, by the process branch of step S27-> step 28-> step S29, and step S27-> step 30-> step S31-> step S29, the opening-closing door 9 opens during execution of a quick cooling mode, and the freezing chamber 8 In this open state, the operation of the ultrasonic device 4 and the electric field device 6 is stopped, and thereafter, the opening / closing door 9 is closed and the freezing chamber 8 is executed during the rapid cooling mode. In this closed state, the ultrasonic device 4 and the electric field device 6 are operated again.

9 is a flowchart showing a processing procedure of a subroutine in cryopreservation mode. When the processing of the cryopreservation mode is started, the process proceeds to step S41. In step S41, opening / closing of the opening / closing door 9 is detected by the opening / closing sensor 38, and when the closing posture of the opening / closing door 9 is detected, the flow proceeds to step S42. In step S42, while operating the cooling apparatus 3 and the electric field apparatus 6, operation | movement of the ultrasonic apparatus 4 is stopped, and it progresses to step S43.

In step 41, when detecting that the open / close door 9 is open, it progresses to step S44. In step S44, while operating the cooling device 3, the operation | movement of the ultrasonic apparatus 4 and the electric field apparatus 6 is stopped, and it progresses to step S45. In step S45, the notification device 47 notifies that the open / close door 9 is in an open state, and the process proceeds to step S43.

In step S43, it is detected by the receiving sensor 39 whether or not the frozen object is taken out from the freezing chamber 8, and when the object has not yet been taken out of the freezing chamber 8 (the object is stored in the freezing chamber 8). If stored), the process returns to Step S41, and if the object has already been taken out from the freezer compartment 8, the subroutine ends and the process returns to the main routine shown in FIG. Turn.

According to the subroutine of the cryopreservation mode of the structure, when the object is carried out from the freezing chamber 8 by the process of step S43, the cryopreservation mode is automatically terminated, and thus the convenience is high.

Further, by the processing branch of step S41 to step 42 to step S43 and step S41 to step 44 to step S45 to step S43, the opening / closing door 9 is opened and the freezing chamber 8 is open during the execution of the cooling storage mode. In this case, the operation of the electric field device 6 is stopped, and then, when the opening / closing door 9 is closed and the freezer compartment 8 is in a closed state during the execution of the rapid cooling mode. (6) is activated again.

According to the freezer configured as described above, in each of the normal cooling mode, the rapid freezing mode, and the freezing preservation mode, the operation and stop of the ultrasonic device 4 (with or without ultrasonic radiation in the freezing chamber 8) and Since the operation and stop of the electric field device 6 (whether the electric field is formed in the freezing chamber 8) are controlled appropriately, the object can be efficiently cooled. In addition, the operation timing of the ultrasonic apparatus 4 and the operation timing of the electric field apparatus 6 which were mentioned above are decided based on the result of the keen examination of this inventor, and the examination based on this.

In addition, a start button is provided on the input side of the control unit 34, the process proceeds to step S23 by the input operation of the start button in step S21 shown in FIG. 8, and the step S22 by the stop operation state of the start button. The processing may be performed to proceed with.

At this time, in step S43 shown in FIG. 9, the subroutine in the cryopreservation mode may be terminated by the stop operation of the start button, and the processing may be returned to step S41 by the input operation state of the start button. .

In addition, during the execution of the subroutine of step S3, the subroutine of step S2 may be executed again under a predetermined condition.

1b: inner wall
3: cooling device
4: ultrasonic device
6: electric field device
8: freezer
17A, 17B: electrode
19 rack (cart)
21: connection device
27: insulator
34: control unit
37: Temperature temperature sensor (freezing detection means, object temperature detection means)
38: opening and closing sensor (opening and closing detection means)

Claims (10)

A freezing chamber (8) for accommodating an object to be frozen is formed, and a cooling device (3) for cooling the freezing chamber (8) and an ultrasonic device (4) for radiating ultrasonic waves in the freezing chamber (8) are provided. As a freezer, it is provided with the control part 34 which controls the operation | movement of the cooling apparatus 3, and controls the operation | movement of the ultrasonic apparatus 4, The said control part 34 does not operate the ultrasonic apparatus 4, A normal cooling mode in which the cooling device 3 is operated, and a rapid cooling mode in which the ultrasonic device 4 and the cooling device 3 are operated, and after the normal cooling mode is executed to cool the freezer compartment 8, the rapid cooling mode is provided. And a control unit (34) configured to execute the freezer. The method of claim 1,
When the freezing detection unit 37 detects that the object is frozen, the control unit 34 detects that the object is frozen by the freezing detection unit 37 during the rapid cooling mode. A freezer characterized in that the rapid cooling mode is terminated by stopping the operation of the device (4). 3. The method according to claim 1 or 2,
The opening and closing detection means 38 which detects the opening and closing of the freezer compartment 8 is provided, and the control part 34 shows that the freezer compartment 8 is opened by the said opening and closing detection means 38 during execution of a quick cooling mode. When it detects, the freezer which stops operation | movement of the ultrasonic apparatus 4, The freezer characterized by the above-mentioned. The method of claim 3,
The controller 34 stops the operation of the ultrasonic apparatus 4 during the execution of the rapid cooling mode, and when the opening / closing detecting means 38 detects the closed state of the freezer compartment 8, the ultrasonic apparatus 4 A freezer, characterized in that for operating). 3. The method according to claim 1 or 2,
When the electric field device 6 which generates an electric field in the freezer compartment 8 is provided so that operation control is possible by the control part 34, and the control part 34 is implementing the at least rapid cooling mode, the electric field device 6 is carried out. And forming an electric field in the freezer compartment (8). 6. The method of claim 5,
And a control unit (34) configured to form an electric field in the freezing compartment (8) by the electric field device (6) even during the normal cooling mode. 6. The method of claim 5,
When the opening / closing detection means 38 which detects the opening / closing of the freezer compartment 8 is provided, and the control part 34 detects that the freezing compartment 8 is open by the said opening / closing detection means 38, the electric field apparatus (6) A freezer characterized by stopping the operation. The method of claim 7, wherein
The control part 34 stops the operation of the electric field apparatus 6, and when it detects the closed state of the freezer compartment 8 by the said opening-closing detection means 34, it operates to operate the electric field apparatus 6 again. Featured freezers. 6. The method of claim 5,
An insulator which can support the object and which can carry in and take out from the freezer compartment 8 by an electrically conductive metal member, and insulates the rack 19 from the inner wall 1b of the freezer compartment 8 ( 27 is provided, one of the pair of electrodes 17A, 17B of the electric field device 6 is formed on the rack 19 side, and the other is formed on the inner wall 1b of the freezing chamber 8. Freezer, characterized in that. The method of claim 9,
When the rack 19 is brought into the freezing chamber 8, a connecting device 21 is provided in contact with the rack 19 and electrically connected thereto, and the inner wall 1b of the connecting device 21 and the freezing chamber 8 is provided. A freezer, characterized in that the electric field device (21) is configured to apply a voltage between the terminals.

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