JP5513681B2 - Refrigeration equipment and method for producing frozen food and drink - Google Patents

Description

  The present invention relates to a refrigeration facility for freezing food and drink, and a method for producing frozen food and drink.

  A technique for freezing foods and drinks such as fruits, vegetables, and fresh fish in a state where a voltage is applied in order to maintain freshness is known (see, for example, JP-A-2001-215074).

  However, the above refrigeration techniques are affected by various factors such as the varieties and sizes of food and drink, as with other refrigeration techniques. For this reason, variations occur in the frozen state. And reproducibility is low and cannot fully maintain the freshness of food and drink.

  This invention is made | formed in view of the said subject, and provides the manufacturing method of the frozen food and drink which manufactures frozen food and drink using this freezing equipment which freezes food and drink while maintaining freshness. The purpose is to do.

The present invention relates to a freezing space that is below freezing, a refrigerator that cools the freezing space to bring the freezing space below freezing, and conductive placement means that is disposed in the freezing space and on which food and drink are placed. And an insulator that insulates the mounting means from the space forming surface that forms the refrigeration space, a power supply terminal that is the mounting means, and a current obtained by superimposing alternating current and direct current on the power supply terminal. A power supply device that simultaneously applies an AC voltage and a DC voltage to the food and drink, and each of the AC current value and the DC current value supplied to the power supply terminal, or the AC voltage value and A control device that controls the AC voltage value and the DC voltage value applied to the food and drink by the power supply device while referring to each of the DC voltage values, and moisture of the food and drink is in the frozen space Ready to be released Te, DC the refrigerator in the process of gradually lowering the temperature of the freezer below the freezing point of the band, the control device, to the AC voltage and the DC voltage by the constant voltage control is provided to said power supply terminal in Rukoto gradually decrease the current value, and maintains the food in a supercooled state, a cooling appliance.

  According to the present invention, various uncertain factors (types of food and drink, variation in quality of each individual, size for each individual, total amount, arrangement, contact state of food and drink and mounting means, Each of the AC voltage and the DC voltage can be applied at a stable and accurate value in a situation where the position, the connection state of the power supply terminal, the temperature in the freezing space, the humidity, the wind contact condition, etc.) are present. Thereby, it can suppress that variation arises in the frozen state. And reproducibility can be improved and the freshness of food and drink can fully be maintained.

  When the food and drink are frozen in a state in which the water of the food and drink cannot be released (for example, in a sealed state), the water to be released at the time of cooling remains in the outer portion of the food and drink. In this case, the outer portion of the food and drink is frozen in a state of excessive moisture compared to the inner portion, and depending on the type of food and drink, the frozen quality is poor. And when such food and drink are thawed, the quality is further deteriorated, for example, the outer portion becomes watery. For example, in comparison with leaves such as spinach, stuffed foods such as radishes and apples have a large amount of moisture and are likely to deteriorate in quality. On the other hand, according to the said invention, it becomes possible to freeze the water | moisture content of the outer part and inner part in food / beverage uniformly, As a result, it becomes possible to prevent deterioration of the quality at the time of thawing | decompression.

  According to the present invention, in the refrigeration equipment of the above means, the control device controls the frequency of the alternating current or the frequency of the alternating voltage with reference to the frequency of the alternating current.

  According to the above invention, each of the AC voltage and the DC voltage can be applied with a more stable and accurate value under a situation having various uncertain factors. Thereby, it can further suppress that variation arises in the frozen state. And reproducibility can be improved further and the freshness of food and drink can be kept more fully.

  According to the present invention, in the refrigeration equipment of the above means, the control device is configured so that the DC voltage value is a negative DC voltage and the absolute value of the DC voltage is larger than the maximum value of the AC voltage. It is characterized by controlling.

  According to the above invention, the food and drink are frozen in a sherbet shape without freezing, so that they can be easily cut with a knife without thawing and are easy to cook and process. And since it can be easily chewed by teeth, it can be edible as it is. Moreover, once frozen food and drink can be transported and stored in a general freezer. Even in this case, it is not oxidized and dried, and the taste, texture, fragrance, and color are maintained for one year or longer as they are before freezing. Thereby, food and drink can be stably supplied in terms of quantity, quality and price. And food and drink can be supplied beyond a season, and a high-class feeling and special feeling can be given.

  In the refrigeration equipment of the above means, the present invention further includes a moving means that allows the placement means to be carried in and out of the refrigeration space, and the power supply terminal enables connection / release switching with respect to the placement means. It is characterized by that.

  In the above invention, the position of the mounting means and the connection state of the power supply terminal change each time it is used, but the AC voltage value and DC voltage value applied to food and drink are controlled by various feedbacks. can do. As described above, even when the situation is such that the loading / unloading is possible and various uncertain elements are present, each of the AC voltage and the DC voltage can be applied with a stable and accurate value.

  The present invention is also a method for producing frozen food and drink, characterized by producing frozen food and drink using the refrigeration equipment of the above means.

  According to the said invention, the frozen food and drink which kept freshness can be manufactured.

  According to the present invention, food and drink can be frozen while maintaining freshness. Moreover, the frozen food and drink which kept freshness can be manufactured.

It is a front view which shows the outline of the freezing equipment which concerns on 1st Embodiment of this invention. It is a circuit diagram which shows the outline of a power supply device and a control apparatus. It is the time history which shows a voltage value. It is an image figure explaining the freezing process of food and drink. It is the time history which shows the internal temperature measured in Experiment 1, and a direct-current value, and shows the case where the food / beverage in an exposed state is frozen and the food / beverage in the sealed state is frozen. It is the photograph of what cut | disconnected the food / beverage frozen in Experiment 1, the food / beverage frozen in the state where the right side was exposed, and the food / beverage frozen in the state sealed on the left side are shown. It is a time history showing the internal temperature and DC current value measured in Experiment 2, when the voltage is applied when the internal temperature is 5 ° C, and when the voltage is applied when the internal temperature is 10 ° C below freezing point Indicates. It is a top view which shows the outline of the freezing equipment which concerns on 2nd Embodiment of this invention.

  Hereinafter, a refrigerator according to the present invention will be described in detail with reference to the drawings.

  [First Embodiment] First, the configuration of the refrigeration facility 1 according to the first embodiment will be described with reference to FIGS. FIG. 1 is a front view showing an outline of the refrigeration facility 1. FIG. 2 is a circuit diagram schematically showing the power supply device 16 and the control device 22. FIG. 3 is a time history showing voltage values.

  The refrigeration facility 1 shown in FIG. 1 employs a new technology that instantaneously freezes the food and drink XA1 (see FIG. 4) after it is in a supercooled state. This refrigeration equipment 1 is a batch system that repeatedly freezes food and drink XA1 for each predetermined amount. Specifically, the refrigeration facility 1 includes a freezer 10 that freezes food and drink XA1 with new technology, and a freezer storage 11 that stores the food and drink XA1 frozen in the freezer 10 in a frozen state. Yes.

  The freezer 10 includes an openable / closable freezing space 12, a heat exchanger (refrigerator) 13 that cools the freezing space 12 to bring the freezing space 12 below freezing point, and a blower 14 that stirs the air in the freezing space 12. A transport device 15 for transporting the food XA1 into and out of the frozen space 12, a power supply terminal 30 connected to the transport device 15, and a power supply device for applying a voltage to the food XA1 via the power supply terminal 30. 16 and a control device 22 for controlling a voltage value applied by the power supply device 16.

  The frozen space 12 is set to an arbitrary size that can accommodate one or a plurality of transfer devices 15. The frozen space 12 includes a floor surface 17, a side surface 18, and a ceiling surface 19 as space forming surfaces. An insulating rubber sheet (not shown) is laid on the floor surface 17. The side surface 18 and the ceiling surface 19 may also be covered with an insulating rubber sheet. On the side surface 18, a loading / unloading port 20 for loading / unloading the transfer device 15 is formed. The carry-in / out port 20 is openable and closable with a door 21 attached thereto.

  The heat exchanger 13 is connected to a condenser (not shown) disposed outside the refrigeration space 12. The heat exchanger 13 takes the heat in the refrigeration space 12 to cool the refrigeration space 12 below freezing point.

  The blower 14 includes a plurality of rotating blades (reference numerals omitted). The blower 14 rotates a plurality of blades to generate an air flow in the refrigeration space 12 and equalizes the temperature and humidity in the refrigeration space 12.

  The transport device 15 can be manually operated. The transport device 15 includes a conductive shelf 24, a plurality of trays 25 on which the food and drink XA1 are placed, and a plurality of casters 26 that allow the shelf 24 to be carried in and out of the frozen space 12. That is, the transport device 15 functions as a placement unit on which the food / drink XA1 is placed. In addition, food / drink XA1 may remain in the container. For example, when beer is adopted as the food and drink XA1, it may be kept in a glass bottle. However, when using a container having low electrical conductivity such as glass, it is possible to reliably apply a voltage to the food and drink XA1 by wrapping the container with aluminum foil having high electrical conductivity. And when considering the frozen quality of the food / drink XA1, the food / drink XA1 is preferably sealed without covering or covering the surface of the food / drink XA1 (in the present invention, putting it in a net or the like) , Means bare.) That is, it is preferable that the food / drink XA1 is placed in a state where the water of the food / drink XA1 can be released into the frozen space 12.

  The shelf 24 arranges a plurality of trays 25 at intervals in the vertical direction. The shelf 24 is made of a conductive material such as stainless steel. Specifically, the shelf 24 includes stainless steel columns as main components. And the shelf 24 is provided with the electroconductive coupler 27 as a connection means for connecting the conveying apparatuses 15 mutually.

  Each of the plurality of trays 25 is made of a conductive material such as stainless steel. Each of the plurality of trays 25 is detachably disposed on the shelf 24.

  Each of the plurality of casters 26 has a tire 28 made of an insulator such as rubber. The plurality of casters 26 are attached below the shelf 24, and the tire 28 rolls on the floor surface 17 of the frozen space 12. In other words, the plurality of casters 26 function as moving means that allows the transport device 15 to be carried in and out of the refrigeration space 12. The plurality of casters 26 have a lock mechanism that restricts rolling of the tire 28. In addition, the plurality of casters 26 insulates the transport device 15 from the floor surface 17 and enables charging of the food XA1 placed on the tray 25. The plurality of casters 26 have a height from the floor surface 17 of the shelf 24 and the tray 25 of 10 cm or more, and prevent electricity from being discharged from the floor surface 17 and freezing of the caster 26 surface.

  The coupler 27 connects the shelves 24 and enables the conveying devices 15 to be energized.

  The power terminal 30 has a clip shape and is attached to and detached from the transport device 15. The power supply terminal 30 is connected to the power supply device 16 via a cable (not shown) and the control device 22. That is, the power supply terminal 30 enables connection / release switching with respect to the transport device 15.

  The power supply device 16 applies an alternating current voltage and a direct current voltage to the food and drink XA1 at the same time by flowing an alternating current and a direct current simultaneously through the control device 22, the cable (not shown), and the power supply terminal 30. The power supply device 16 is grounded and functions as a ground. That is, the power supply device 16 functions as a ground that discharges a charge charged by application of a voltage.

  As shown in FIG. 2, the power supply device 16 includes a positive power supply unit 61, a negative power supply unit 62, and the like. The control device 22 includes an ammeter 63, a positive transformer 64, a negative transformer 65, a voltmeter 66, a reference signal input unit 67, a feedback signal input unit 68, an error amplifier 69, and an optical isolator. 70 and the like.

  The positive power supply unit 61 generates a current for applying a positive voltage. The negative power supply unit 62 generates a current for applying a negative voltage. The ammeter 63 measures the alternating current value from the positive power supply unit 61 or the negative power supply unit 62, its frequency, and the direct current value, and inputs the values to the feedback signal input unit 68 as a feedback signal.

  The positive-side transformer 64 transforms the positive voltage applied by the positive-side power supply unit 61 based on the control signal input from the optical isolator 70, and applies it to the food / drink XA1. The negative transformer 65 transforms the negative voltage applied by the negative power supply unit 62 based on the control signal input from the optical isolator 70, and applies it to the food or drink XA1. The voltmeter 66 measures the AC voltage value and the DC voltage value from the positive side transformer 64 or the negative side transformer 65 and inputs the values to the feedback signal input unit 68 as a feedback signal.

  The reference signal input unit 67 receives a predetermined AC current value and frequency and a DC current value set in advance, or a predetermined AC voltage value and DC voltage value set in advance. The value of the ammeter 63 and the value of the voltmeter 66 are input to the feedback signal input unit 68 as a feedback signal. The error amplifier 69 amplifies the difference between the signal from the reference signal input unit 67 and the signal from the feedback signal input unit 68 and outputs it as a control signal. The optical isolator 70 outputs the control signal from the error amplifier 69 to the positive side transformer 64 or the negative side transformer 65.

  Such a control device 22 is configured so that the AC voltage applied to the food / drink XA1 by the power supply device 16 while feeding back each of the AC current value and the DC current value, or each of the AC voltage value and the DC voltage value to a desired value. Value and DC voltage value are controlled. Furthermore, the control device 22 can also feed back the frequency of the alternating current and the frequency of the alternating voltage to a desired frequency. The DC voltage value is controlled so as to be a negative DC voltage and the absolute value of the DC voltage is larger than the maximum value of the AC voltage. That is, as shown in FIG. 3, the time history of the voltage value applied to the food / drink XA1 is a waveform that always vibrates with a negative value.

  The control device 22 performs the above control only when the door 21 is closed. That is, when the door 21 is open, the control device 22 does not perform the above control and sets the voltage value applied by the power supply device 16 to zero. Thus, the control device 22 functions as a safety device of the power supply device 16 and prevents an electric shock accident due to the opening of the door 21. In addition, the control device 22 sets an upper limit value of the current value flowing from the power supply device 16 and controls the power supply device 16 to be equal to or less than the upper limit value.

  The freezer 11 stores and stores the food XA1 frozen in the freezing space 12 of the freezer 10 while being placed on the tray 25 of the transport device 15. The frozen storage 11 includes a freezing space 32 that can be opened and closed, a heat exchanger 33 that cools the freezing space 32 below freezing, and a blower 34 that stirs the air in the freezing space 32. .

  In addition, the structure of the freezing space 32, the heat exchanger 33, and the air blower 34 with which the freezer storage 11 is equipped is the same as that of the freezing space 12, the heat exchanger 13, and the air blower 14 with which the freezer 10 is provided, and the description thereof is omitted. .

  Next, the freezing operation of the food and drink XA1 in the refrigeration facility 1 will be described.

  First, a plurality of foods and drinks XA1 are placed on the tray 25 of the transport device 15 outside the frozen space 12. Then, the door 21 of the freezer 10 is opened, and the transport device 15 is carried into the freezing space 12. In addition, the power terminal 30 is connected to the transport device 15. Furthermore, the door 21 is closed and the food and drink XA1 is confined in the frozen space 12. At this time, it is preferable that the freezing of the food / drink XA1 is not started. For this reason, it is preferable that the temperature in the frozen space 12 is not below freezing. In addition, although the temperature in the freezing space 12 may be below freezing point, it is preferable that freezing of the food / drink XA1 does not proceed. Therefore, when the temperature in the freezing space 12 is below freezing point, it is necessary to proceed quickly. is there. Thereafter, the AC voltage and the DC voltage are simultaneously applied to the food and drink XA1, and then the heat exchanger 13 is operated to start cooling, thereby freezing by the new technology.

  By cooling the food / drink XA1 below the freezing point, the water of the food / drink XA1 is released. It is assumed that the moisture disappears due to freezing or adhering to the floor surface 17, the side surface 18, the ceiling surface 19, etc. constituting the frozen space 12. The amount of water released from the food / drink XA1 gradually decreases with a decrease in temperature, and finally no water is released from the food / drink XA1. In addition, the water | moisture content of food / beverage XA1 is only discharge | released moderately, and most water | moisture content stays in the inside of food / beverage XA1. That is, it is presumed that the amount of moisture released into the frozen space 12 and remaining in the frozen space 12 decreases as the temperature decreases. Since the amount of moisture in the frozen space 12 is proportional to the amount of discharge from the food / drink XA1 to which a voltage is applied, it is assumed that the amount of discharge from the food / drink XA1 gradually decreases as the temperature decreases. . As a result, it is assumed that the value of the direct current flowing through the food and drink XA1 gradually decreases.

  Then, for example, after the freezing space 12 reaches 20 ° C. below freezing, the application of the AC voltage and the DC voltage is stopped, and the food and drink XA1 is discharged, and then the door 21 of the freezer 10 is opened. Further, the power terminal 30 is removed from the transport device 15. Further, the conveying device 15 is carried out of the freezing space 12.

  Thereafter, the door (reference numeral omitted) of the frozen storage 11 is opened, and the transport device 15 is carried into the freezing space 32 below freezing point. Then, the door is closed, and the food and drink XA1 is confined in the frozen space 32. Thereby, the food and drink XA1 frozen in the freezer 10 is stored in a frozen state.

  Moreover, when the preserve | saved food and drink XA1 of the frozen state is shipped, the door of the frozen storage 11 is opened and the conveying apparatus 15 is carried out of the frozen space 32.

  Next, the freezing process of the food and drink XA1 in the freezer 10 will be described with reference to FIG. FIG. 4 is an image diagram illustrating a freezing process of the food / drink XA1.

  As shown in FIG. 4, the food / drink XA1 is in a supercooled state of, for example, 10 ° C. below freezing by being simultaneously applied with an AC voltage and a DC voltage. Thereafter, the application of AC voltage and DC voltage is stopped. And it freezes instantaneously, for example at 20 degreeC below freezing point.

  As described above, according to the refrigeration facility 1, the plurality of foods and drinks XA1 can be collectively arranged in the freezer 10 only by carrying the transport device 15 on which the plurality of foods and drinks XA1 are placed into the freezer 10. . That is, it is not necessary to place a plurality of foods and drinks XA1 on the transport device 15 one by one in the freezer 10. And the several food-and-drink XA1 can be collectively taken out from the freezer 10 only by carrying out the conveying apparatus 15 in which the several food-and-drink XA1 was mounted from the freezer 10. FIG. That is, it is not necessary to take out the plurality of foods and drinks XA1 from the transport device 15 one by one in the freezer 10.

  [Experiment 1] Next, Experiment 1 in which the influence of moisture contained in the food and drink XA1 on the frozen state is examined will be described with reference to FIGS. FIG. 5 is a time history showing data measured in Experiment 1 (temperature in the frozen space 12, value of direct current applied to the food XA1), the horizontal axis indicates time [minutes], and the vertical axis indicates temperature. [° C.] and DC current value [mA] are shown. A hollow plot (◯ or □) is shown when the exposed food or drink XA1 is frozen. When the food / drink XA1 in a sealed (vacuum packed) state is frozen, a black plot (● or ■) is shown. The temperature in the frozen space 12 is indicated by a circular plot (◯ or ●). The DC current value is indicated by a square plot (□ or ■). FIG. 6 is a photograph of food and drink XA1 frozen in the same experiment as Experiment 1, showing the food and drink XA1 frozen in the exposed state on the right side and the food and drink XA1 frozen in the sealed state on the left side. Show.

  In this Experiment 1, the change in the internal temperature [° C.] and the direct current value [mA] when the exposed food and drink XA1 is frozen, and the internal temperature when the sealed food and drink XA1 is frozen [ [° C.] and DC current value [mA] were measured and compared. Moreover, food-drink XA1 frozen in this experiment 1 was cut with the knife.

  The internal humidity at the start of the experiment was about 55%. The applied voltage was a DC voltage of −2500V and an AC voltage of 1500V. As food / drink XA1, what cut one radish into 1/3 was used. However, FIG. 6 shows a state in which an experiment similar to the experiment 1 performed with an apple (in an uncut state) is cut in half. This is because the difference in appearance was not clear in radish.

  As shown in FIG. 5, when the exposed food and drink XA1 was frozen, the direct current value [mA] gradually decreased with a decrease in the internal temperature [° C.]. On the other hand, when the food / drink XA1 in a sealed state was frozen, the direct current value [mA] became substantially constant at a low value regardless of the decrease in the internal temperature [° C.]. Moreover, any food and drink XA1 could be easily cut with a knife.

  When both were compared, when the food / drink XA1 in an exposed state was frozen, a higher DC current value [mA] was shown than when the food / drink XA1 in a sealed state was frozen. This is presumed to be due to discharge due to moisture released from the food / drink XA1. That is, if the direct current value [mA] is high, it is presumed that the discharge amount is large. If so, when the exposed food / drink XA1 is frozen, it is assumed that the amount of water released from the food / drink XA1 gradually decreases as the temperature decreases. However, not all moisture is released, and the release of moisture stops in the middle as the temperature decreases.

  As FIG. 6 shows, it turns out that the food / drink XA1 sealed and frozen differs in a state (color) by the inner part and the outer part. This originates in the water | moisture content which should be discharge | released at the time of cooling staying in the outer part in the said food-drink XA1. For this reason, the outer side part in food-drinks XA1 is frozen in the state of excess water compared with an inner side part, and it can be said that frozen quality is bad. On the other hand, it can be seen that the food / drink XA1 frozen by exposure has released moderate moisture, and the state (color) is uniform between the inner part and the outer part.

  [Experiment 2] Next, experiment 2 in which the timing of appropriate voltage application is examined will be described with reference to FIG. FIG. 7 is a time history showing data measured in Experiment 2 (temperature in the frozen space 12, value of direct current applied to the food XA1), the horizontal axis indicates time [minutes], and the vertical axis indicates temperature. [° C.] and DC current value [mA] are shown. A case where a voltage is applied when the temperature in the frozen space 12 is 5 ° C. is indicated by a hollow plot (◯ or □). A case where a voltage is applied when the temperature in the freezing space 12 is 10 ° C. below freezing is indicated by a black plot (● or ■). The temperature in the frozen space 12 is indicated by a circular plot (◯ or ●). The DC current value is indicated by a square plot (□ or ■).

  In this experiment 2, the transition of the internal temperature [° C.] and the direct current value [mA] when a voltage is applied when the temperature in the frozen space 12 is 5 ° C., and the temperature in the frozen space 12 is 10 ° C. below freezing point. When the voltage was applied at the time, the internal temperature [° C.] and the transition of the direct current value [mA] were measured and compared. Moreover, food-drinks XA1 frozen in this experiment 2 were cut with the knife.

  The internal humidity at the start of the experiment was about 50%. The applied voltage was a DC voltage of −2500V and an AC voltage of 1500V. As food / drink XA1, what cut one radish into 1/3 was used.

  As shown in FIG. 7, when a voltage is applied when the temperature in the frozen space 12 is 5 ° C. (the time before freezing of the food / drink XA 1), the direct current increases with a decrease in the internal temperature [° C.]. The value [mA] gradually decreased. On the other hand, when a voltage was applied when the temperature in the freezing space 12 was 10 ° C. below freezing point, the DC current value [mA] became substantially constant at a low value regardless of the decrease in the internal temperature [° C.]. . That is, when a voltage is applied when the temperature in the frozen space 12 is 10 ° C. below freezing point, the release of moisture is completed at the time when the voltage is applied, and the food and drink XA1 has already been frozen (general freezing). You can see that it is closed. In fact, when a voltage was applied when the temperature in the frozen space 12 was 10 ° C. below freezing point, the food and drink XA1 could not be cut with a knife. In addition, when the voltage was applied when the temperature in the frozen space 12 was 5 ° C., the food and drink XA1 could be easily cut with a knife.

  In this way, it is possible to eliminate the work in the freezing space 12 where there is a risk of electric shock, and it is safe. Moreover, the time for opening the frozen space 12 can be shortened. As a result, the influence of outside air can be reduced, and the inside of the frozen space 12 can be maintained in a constant state. As a result, the inside of the frozen space 12 can be kept in an ideal state. That is, a large amount of food and drink can be frozen while maintaining freshness. And generation | occurrence | production of the frost resulting from inflow of external air can be prevented. Thereby, the fall or stop of the function of the heat exchanger 13 and the air blower 14 which are arrange | positioned in the frozen space 12 can be prevented.

  In addition, the food and drink XA1 can be frozen in the frozen space 12, and the food and drink XA1 frozen in the frozen space 12 can be stored in the frozen storage 11 in a frozen state. That is, the function of storing the frozen food and drink XA1 in the frozen state can be transferred from the frozen space 12 to the frozen storage 11 having relatively low initial cost and running cost. Thereby, after freezing a large amount of food and drink XA1 while maintaining freshness, it can be stored at a low cost in a frozen state.

  Further, the control device 22 refers to each of the alternating current value and the direct current value supplied to the power supply terminal, or each of the alternating voltage value and the direct current voltage value, and the alternating current applied to the food / drink XA1 by the power supply device 16. Since the voltage value and the direct-current voltage value are controlled, various uncertain factors (types of food and drink XA1, variation in quality of each individual, size for each individual, total amount, arrangement, food and drink XA1 and transport device 15 Each of the AC voltage and the DC voltage was stabilized in a situation having a contact state, a position of the transport device 15, a connection state of the clip-shaped power supply terminal 30, a temperature in the freezing space 12, a humidity, a wind contact condition, etc. An accurate value can be applied. By applying a stable and accurate value, the electric charge charged to the food and drink XA1 is stabilized, and cell destruction and oxidation are prevented. Thereby, it can suppress that variation arises in the frozen state. And reproducibility can be improved and the freshness of food-and-drink XA1 can fully be maintained.

  Further, since the control device 22 refers to the frequency of the alternating current and controls the frequency of the alternating current or the frequency of the alternating voltage, each of the alternating voltage and the direct current voltage under the situation having various uncertainties is determined. It can be applied with a more stable and accurate value. Thereby, it can further suppress that variation arises in the frozen state. And reproducibility can be improved further and the freshness of food-and-drink XA1 can be kept more fully.

  Furthermore, since the control device 22 controls the DC voltage value so that the negative DC voltage is obtained and the absolute value of the DC voltage is larger than the maximum value of the AC voltage, the food / drink XA1 is apt. Freezes like sherbet without freezing. For this reason, it can be easily cut with a kitchen knife without thawing and is easy to cook and process. And since it can be easily chewed by teeth, it can be edible as it is. Moreover, the food and drink XA1 once frozen can be transported and stored in a general freezer (for example, the frozen storage 11). Even in this case, it is not oxidized and dried, and the taste, texture, fragrance, and color are maintained for one year or longer as they are before freezing. Thereby, food and drink XA1 can be stably supplied in terms of quantity, quality, and price. And food and drink XA1 can be supplied beyond a season and can give a high-class feeling and special feeling.

  By the way, when food / drink XA1 is made into the state which cannot release | release the water | moisture content of the said food / drink XA1 (for example, the sealed state), the water | moisture content which should be discharge | released at the time of cooling stays in the outer part in the said food / drink XA1. In this case, the outer portion of the food / drink XA1 is frozen in a state of excessive moisture compared to the inner portion, and depending on the type of food / drink, the frozen quality is poor. And when such food and drink are thawed, the quality is further deteriorated, for example, the outer portion becomes watery. For example, in comparison with leaves such as spinach, stuffed foods such as radishes and apples have a large amount of moisture and are likely to deteriorate in quality. On the other hand, according to the said invention, it becomes possible to freeze the water | moisture content of the outer part and inner part in food / beverage uniformly, As a result, it becomes possible to prevent deterioration of the quality at the time of thawing | decompression.

  [Second Embodiment] Next, the configuration of the refrigeration equipment 2 according to the second embodiment will be described with reference to FIG. FIG. 8 is a top view schematically showing the refrigeration equipment 2.

  In addition, only the characteristic part of the refrigeration equipment 2 according to the second embodiment will be described, and description of the same configuration, operation, and effect as in the first embodiment will be appropriately omitted.

  The refrigeration equipment 2 shown in FIG. 8 is a tunnel type system that sequentially freezes food and drink XA1. Specifically, the refrigeration facility 2 includes a refrigerator 40 and a freezer 41.

  The refrigerator 40 includes a refrigeration space 42, a heat exchanger (not shown), a blower (not shown), a transfer device 43, a power supply terminal 53, a power supply device 44, a control device 54, and a transfer device 43. And a rail 45 that can be carried into and out of the freezing space 42.

  The frozen space 42 includes a floor surface 46, side surfaces 47, and a ceiling surface (not shown) as space forming surfaces. On the side surface 47, a carry-in port 48 for carrying in the carrying device 43 and a carry-out port 49 for carrying out the carry device 43 are formed. The carry-in port 48 is openable and closable with a door 50 attached thereto. The carry-out port 49 is openable and closable with a door 51 attached thereto.

  The transport device 43 can be manually operated. Moreover, the conveyance apparatus 43 is self-propelled and can be automatically driven based on a radio signal from a controller (not shown). The transport device 43 includes a shelf 24, a plurality of trays 25, and a plurality of sliders 52 that allow the shelf 24 to be carried in and out of the refrigeration space 42.

  Each of the plurality of sliders 52 includes a roller (not shown) made of an insulator such as rubber. The plurality of sliders 52 are attached below the shelf 24, and the rollers roll along the rails 45. That is, the plurality of sliders 52 function as a moving unit that enables the transport device 43 to be carried into and out of the refrigeration space 42. In addition, the plurality of sliders 52 insulate the transport device 43 from the floor surface 46 and allow the food / drink XA1 placed on the tray 25 to be charged.

  The power supply terminal 53 has a long shape and is fixed to the side surface 47 so as to be along the direction from the carry-in port 48 to the carry-out port 49. The power supply terminal 53 is connected to the power supply device 44 via a cable (not shown) and a control device 54. The power terminal 53 contacts the side of the transport device 43 that travels in the freezing space 42. That is, the power supply terminal 53 enables connection / release switching with respect to the transport device 43.

  The rail 45 is coated with an insulator such as resin (not shown). The rail 45 is laid in an annular shape. Specifically, the rail 45 penetrates the freezing space 42 of the refrigerator 40 through the carry-in port 48 and the carry-out port 49, and the freezing space 55 of the freezer 41 through the carry-in port and the carry-out port (both not shown). It is laid so as to penetrate. That is, the rail 45 functions as a moving unit that allows the transport device 43 to be carried in and out of the freezing space 42 together with the plurality of sliders 52. Moreover, the rail 45 insulates the conveyance apparatus 43 from the floor surface 46, and enables the food / beverage XA1 placed on the tray 25 to be charged.

  The freezer 41 includes a refrigeration space 55, a heat exchanger (not shown), and a blower (not shown).

  In addition, the structure of the freezing space 55 with which the freezer 41 is equipped, a heat exchanger, and an air blower is the same as that of the freezing space 42 with which the refrigerator 40 is equipped, a heat exchanger, and an air blower, The description is abbreviate | omitted.

  Next, the freezing operation of the food and drink XA1 in the refrigeration facility 2 will be described.

  First, a plurality of foods and drinks XA1 are placed on the tray 25 of the transport device 43 outside the frozen space 42. And the door 50 by the side of the entrance 48 of the refrigerator 40 is opened, and the conveying apparatus 43 is carried in in the freezing space 42 below freezing point. As a result, the power terminal 53 is connected to the transport device 43. Further, the door 50 on the carry-in port 48 side is closed, and the food and drink XA1 is confined in the frozen space 42. Furthermore, the AC voltage and the DC voltage are simultaneously applied to the food / drink XA1 to perform freezing by the new technology.

  Thereafter, the application of the AC voltage and the DC voltage is stopped, and the charge charged in the food and drink XA1 is released, and then the door 51 on the carry-out port 49 side of the refrigerator 40 is opened. Then, the transfer device 43 is carried out of the freezing space 42. Moreover, the door 51 by the side of the carrying-out exit 49 is closed, and it respond | corresponds to freezing of the subsequent food-drinks XA1.

  Further, the door (reference numeral omitted) on the carry-in side of the freezer 41 is opened, and the transfer device 43 is carried into the freezing space 55 below the freezing point. Further, the door on the carry-in side is closed, and the food and drink XA1 in the frozen space 55 is confined. Thereby, food-drinks XA1 frozen with the refrigerator 40 are preserve | saved with a frozen state.

  Thereafter, when the stored frozen food XA1 is shipped, the door (reference numeral omitted) on the outlet side of the freezer 41 is opened, and the transfer device 43 is carried out of the frozen space 55.

  Thus, according to the refrigeration facility 2, the flow in the refrigeration space 42 can be in one direction from the carry-in port 48 to the carry-out port 49. Thereby, the conveyance device 43 on which the food and drink XA1 is placed can be sequentially carried out of the frozen space 42 while the conveyance device 43 on which the food and drink XA1 is placed is sequentially carried into the frozen space 42. As a result, a larger amount of food and drink XA1 can be handled.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and technical idea thereof.

  That is, in each of the above embodiments, the position, size, shape, material, orientation, quantity, and the like of each component can be changed as appropriate. For example, the number of trays 25 is not limited to the number shown.

  That is, in the said 1st Embodiment, you may make it preserve | save the food-and-drink XA1 frozen with the freezer 10 in the freezer 10 as it is. That is, the refrigeration equipment 1 may not include the frozen storage 11.

1, 2 Refrigeration equipment 12, 42 Refrigerating space 13 Heat exchanger (refrigerator)
15, 43 Conveying device (mounting means)
16, 44 Power supply device 17, 46 Floor (space forming surface)
18, 47 Side (space forming surface)
19 Ceiling (space forming surface)
22 Control device 25 Tray 28 Tire (moving means, insulator)
30, 53 Power terminal 45 Rail (moving means, insulator)
52 Slider (moving means, insulator)
XA1 Food and drink

Claims (5)

A freezing space below freezing point,
A refrigerator that cools the freezing space to bring the freezing space below freezing;
Conductive placement means disposed in the frozen space and on which food and drink are placed;
An insulator that insulates the placement means from a space forming surface that forms the frozen space;
A power supply terminal connected to the placing means,
A power supply device for simultaneously applying an AC voltage and a DC voltage to the food and drink by flowing a current obtained by superimposing alternating current and direct current on the food and drink through the power supply terminal;
With reference to each of the AC current value and DC current value supplied to the power supply terminal, or each of the AC voltage value and DC voltage value, the AC voltage value and the DC applied to the food by the power supply device A control device for controlling the voltage value,
In the process of allowing the moisture of the food and drink to be released into the frozen space, and in the process where the refrigerator lowers the temperature of the frozen space in a zone below freezing point, the control device includes the AC voltage and the a DC voltage by the constant voltage control, in Rukoto gradually decreasing the DC current value supplied to the power supply terminal, and maintains the food in a supercooled state,
Refrigeration equipment. The control device refers to the frequency of the alternating current, and controls the frequency of the alternating current or the frequency of the alternating voltage,
The refrigeration equipment according to claim 1 . The control device controls the DC voltage value so as to be a negative DC voltage and so that the absolute value of the DC voltage is larger than the maximum value of the AC voltage.
The refrigeration equipment according to claim 1 or 2 . A moving means for allowing the placing means to be carried in and out of the frozen space;
The power supply terminal is characterized by enabling connection / opening switching with respect to the placing means.
The refrigeration equipment according to any one of claims 1 to 3 . A frozen food or drink is produced using the refrigeration equipment according to any one of claims 1 to 4 .
A method for producing frozen food and drink.