WO2023063134A1 - Réfrigérateur - Google Patents

Réfrigérateur Download PDF

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Publication number
WO2023063134A1
WO2023063134A1 PCT/JP2022/036917 JP2022036917W WO2023063134A1 WO 2023063134 A1 WO2023063134 A1 WO 2023063134A1 JP 2022036917 W JP2022036917 W JP 2022036917W WO 2023063134 A1 WO2023063134 A1 WO 2023063134A1
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WO
WIPO (PCT)
Prior art keywords
electrode
shield case
door
sensor
voltage
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Application number
PCT/JP2022/036917
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English (en)
Japanese (ja)
Inventor
貴代志 森
桂 南部
範幸 米野
Original Assignee
パナソニックＩｐマネジメント株式会社
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.)
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to CN202280066626.5A priority Critical patent/CN118119808A/zh
Publication of WO2023063134A1 publication Critical patent/WO2023063134A1/fr

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    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • 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
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/46—Dielectric heating

Definitions

  • the present invention relates to a refrigerator that can dielectrically heat food.
  • Patent Document 1 discloses a freezer that can thaw frozen food.
  • the freezer of Patent Document 1 has a high-frequency heating chamber in which food to be thawed is accommodated and in which high-frequency heating (dielectric heating) is performed on the accommodated food.
  • the high-frequency heating chamber is configured to be able to introduce cold air from the freezer compartment. This allows the high-frequency heating chamber to be used as a freezing chamber when not used for defrosting.
  • an object of the present invention is to suppress leakage of an alternating electric field from the heating space of a refrigerator that dielectrically heats food to the outside.
  • a shield case made of a metal material and having an opening on the front side that communicates between the inside and the outside; a first electrode disposed within the shield case; a second electrode arranged in the shield case so as to face the first electrode with a gap therebetween, and forming a heating space for dielectrically heating food between the first electrode and the first electrode; an oscillation unit that generates an alternating voltage to be applied between the first electrode and the second electrode; a door that connects or separates the heating space and the outside of the shield case; a first sensor that detects the closed door that separates the heating space from the outside of the shield case; When the first sensor detects the closed door, the oscillator generates an alternating voltage, A refrigerator is provided in which, when the first sensor cannot detect the door in a closed state while the AC voltage is being generated by the oscillation unit, generation of the AC voltage by the oscillation unit is stopped.
  • leakage of an alternating electric field to the outside from the heating space of a refrigerator that dielectrically heats food can be suppressed.
  • a refrigerator includes a shield case having an opening on the front side that communicates between the inside and the outside, the shield case being made of a metal material, a first electrode arranged in the shield case, the first a second electrode arranged in the shield case so as to face the first electrode with a gap therebetween and forming a heating space for dielectrically heating food between the first electrode and the first electrode; and the second electrode, a door connecting or separating the heating space and the outside of the shield case, and the heating space and the outside of the shield case and a first sensor that detects the door in a closed state that divides the door, and when the first sensor detects the door in a closed state, the oscillator generates an AC voltage When the first sensor becomes unable to detect the closed door while the AC voltage is being generated from the oscillator, the AC voltage from the oscillator is stopped.
  • leakage of the alternating electric field to the outside from the heating space of the refrigerator that dielectrically heats the food can be suppressed.
  • the first sensor may be a sensor that detects the closed door by contact with the door.
  • the first sensor may be arranged outside the shield case. This prevents the first sensor from malfunctioning due to the alternating electric field generated in the shield case.
  • the oscillator may be arranged outside the shield case. This prevents the oscillator from malfunctioning due to an alternating electric field generated in the shield case.
  • the refrigerator may further include a drawer that accommodates food to be heated and that can be taken in and out of the heating space.
  • the drawer may be connected to the door.
  • the refrigerator further includes a second sensor for detecting the drawer existing at a predetermined position between the first electrode and the second electrode, and the second sensor detects the predetermined
  • the oscillator is capable of generating an alternating voltage when detecting the drawer at the position, and wherein the second sensor is at the predetermined position during the generation of the alternating voltage of the oscillator.
  • the oscillation unit may stop generating the AC voltage.
  • the heating space may be at least part of a freezer compartment that freezes food.
  • frozen food can be thawed as it is.
  • the first sensor may be a Hall sensor arranged outside the shield case.
  • FIG. 1 is a longitudinal sectional view of the refrigerator according to Embodiment 1.
  • FIG. 1 the left side is the front side of the refrigerator and the right side is the rear side of the refrigerator.
  • FIG. 2 is a block diagram showing the control system of the refrigerator.
  • the XYZ orthogonal coordinate system shown in the drawings is for facilitating understanding of the embodiments according to the present invention, and does not limit the embodiments.
  • the X-axis direction indicates the front-rear direction (depth direction) of the refrigerator 10
  • the Y-axis direction indicates the left-right direction (width direction)
  • the Z-axis direction indicates the vertical direction (height direction).
  • refrigerator 10 includes main body 12 .
  • the main body 12 includes an outer housing 14 that is made of a metal material and constitutes the outer surface of the refrigerator 10, an inner housing 16 that is made of a resin material such as ABS and constitutes the inner surface of the refrigerator 10, and an outer housing.
  • the space between the body 14 and the inner housing 16 is filled with a heat insulating material 18 such as rigid urethane foam.
  • the main body 12 of the refrigerator 10 has a plurality of storage chambers for storing food (ingredients, processed foodstuffs, etc.).
  • storage chambers are provided from the top with a refrigerating chamber 12a, a freezing/thawing chamber 12b, a freezing chamber 12c, and a vegetable chamber 12d.
  • the freeze/thaw chamber 12b and the freezer chamber 12c are in communication with each other.
  • the refrigerator compartment 12a is a space that maintains a temperature range in which food does not freeze, for example, a temperature range of 1°C to 5°C.
  • the freezing/thawing chamber 12b and the freezing chamber 12c are spaces maintained in a temperature range in which food is frozen, for example, a temperature range of -22°C to -15°C.
  • the freezing/thawing chamber 12b which will be described later in detail, can not only freeze food but also heat food, for example, thaw frozen food.
  • the vegetable compartment 12d is a space maintained in a temperature range equal to or higher than the temperature range of the refrigerator compartment 12a, for example, a temperature range of 2°C to 7°C.
  • the refrigerator 10 may be provided with semi-freezing spaces at -1°C or -3°C.
  • a machine room 12e is provided in the upper part of the main body 12 of the refrigerator 10.
  • the machine room 8 houses a compressor 20 that constitutes a refrigerating cycle of the refrigerator 10 and circulates the refrigerant of the refrigerating cycle.
  • the machine room 12e can be provided in the lower part of the main body 12 of the refrigerator 10.
  • a cooling chamber 12f is provided behind the freezer compartment 12c and the vegetable compartment 12d. Inside the cooling chamber 12f, a cooler 22 that forms a refrigerating cycle of the refrigerator 10 and through which a refrigerant passes is arranged. A cooling fan 24 blows the air (cold air) in the cooling chamber 12f cooled by the cooler 22 toward the refrigerating chamber 12a, the freezing/thawing chamber 12b, the freezing chamber 12c, and the vegetable chamber 12d to the cooling chamber 12f. is provided.
  • the refrigerator 10 is provided with three doors 12g to 12i.
  • the door 12g can be opened and closed, and connects or disconnects the refrigerator compartment 12a and the outside.
  • the door 12h can be opened and closed, and connects or separates the freezing/thawing chamber 12b and the freezing chamber 12c from the outside.
  • the door 12i can be opened and closed, and connects or separates the vegetable compartment 12d and the outside.
  • dampers 26A to 26C for controlling the flow rate of cold air flowing into each chamber 12a to 12d are arranged in the flow path between each chamber 12a to 12d and the cooling fan 24 (see FIG. 2). 1 shows only the damper 26B).
  • a damper 26B is arranged in the flow path between the freezing/thawing chamber 12b and the cooling fan 24. As shown in FIG. Cold air passes through freeze/thaw compartment 12b and flows into freezer compartment 12c.
  • the refrigerator 10 includes temperature sensors 28A to 28C that measure the internal temperatures of the refrigerating compartment 12a, the freezing/thawing compartment 12b, the freezing compartment 12c, and the vegetable compartment 12d.
  • the control unit 30 of the refrigerator 10 executes cooling control based on the measurement results of the plurality of temperature sensors 28A to 28C. , and dampers 26A to 26C, the temperatures in refrigerator compartment 12a, freeze/thaw compartment 12b, freezer compartment 12c, and vegetable compartment 12d are appropriately maintained.
  • the control unit 30 is, for example, a control board that is arranged in the machine room 12e and includes a processor such as a CPU, a storage device such as a memory that stores programs, and a circuit.
  • a processor controls compressor 20, cooling fan 24, and dampers 26A-26C according to a program stored in a memory device.
  • the refrigerator 10 includes door opening/closing sensors 32A to 32C that detect the opening/closing states of the plurality of doors 12g to 12i, respectively.
  • the door opening/closing sensors 32A-32C are, for example, switches that detect the closed doors 12g-12i by coming into contact with the doors 12g-12i.
  • the door open/close sensors 32A-32C are provided at positions on the main body 12 of the refrigerator 10 where they can come into contact with the inner surfaces of the doors 12g-12i. Further, detection signals of the door opening/closing sensors 32A to 32C are transmitted to the control section 30.
  • the control unit 30 controls lighting devices (not shown) provided in each of the refrigerator compartment 12a, the freeze/thaw compartment 12b, the freezer compartment 12c, and the vegetable compartment 12d. is ON/OFF controlled.
  • the switch may be a mechanical switch, or a magnetic sensor such as a Hall sensor, that is, a non-contact switch. Magnetic sensors such as Hall sensors, MR sensors, and reed switches have the advantages of being easier to be miniaturized than mechanical switches and not impairing the design of refrigerator 10 because they do not have projections.
  • refrigerator 10 includes a user interface 34 for the user to operate refrigerator 10 .
  • the user interface 34 may be a touch panel or the like built into the refrigerator 10 and/or may be the user's mobile device.
  • software (application) for operating the refrigerator 10 is installed in the mobile terminal.
  • the user interface 34 when one of the door opening/closing sensors 32A to 32C detects that the corresponding door 12g to 12i is open for a predetermined time, the user interface 34 notifies the user that the door is open.
  • the user interface 34 is also used by the user when performing thawing in the freeze/thaw compartment 12b. Details of the freezing/thawing chamber 12b will now be described.
  • FIG. 3 is a perspective view of the heating module. 4 is a cross-sectional view of the heating module, and FIG. 5 is a cross-sectional view of the heating module taken along line AA shown in FIG.
  • FIG. 6 is a block diagram showing the control system of the heating module.
  • the heating module 40 shown in FIGS. 3 to 5 is a module that heats frozen food and is incorporated in the refrigerator 10. Freeze/thaw chamber 12 b is provided within heating module 40 . Although details will be described later, the heating module 40 is configured to generate an alternating electric field in the freezing/thawing chamber 12b and dielectrically heat the food by the alternating electric field.
  • the heating module 40 has a rectangular parallelepiped shape and is a double-walled structure including an inner case 42 and a shield case 44 that houses the inner case 42 .
  • the shield case 44 functions as a housing for the heating module 40 .
  • the inner case 42 defines a storage chamber in which food is stored, that is, a freeze/thaw chamber 12b.
  • the inner case 42 is a rectangular parallelepiped box made of an insulating material such as resin and provided with an opening on the front side for communication between the inside and the outside.
  • the shield case 44 is made of a metal material, for example, made of a metal material such as aluminum.
  • the shield case 44 is a rectangular parallelepiped box having an opening on the front side for communication between the inside and the outside, and stores the inner case 42 therein.
  • the heating module 40 includes a drawer 46 that is inserted into and removed from the freezing/thawing chamber 12b in the front-rear direction (X-axis direction) and stores food.
  • the drawer 46 is made from a resin material.
  • a guide rail 47 is provided on the inner wall surface 42a of the inner case 42 to guide the drawer 46 in the front-rear direction (X-axis direction) when the drawer 46 is put in and taken out.
  • Such a drawer 46 facilitates the loading and unloading of food from the freeze/thaw chamber 12b.
  • the inner case 42 and the shield case 44 of the heating module 40 are provided with a plurality of ventilation holes 42b, 44a communicating with the freezing/thawing chamber 12b so that the food in the freezing/thawing chamber 12b can be frozen. Cool air that has passed through the damper 26B flows into the freezing/thawing chamber 12b through these ventilation holes 42b and 44a. Thereby, the food in the heating module 40, that is, in the freezing/thawing chamber 12b can be frozen.
  • the heating module 40 comprises a first electrode 48 and a second electrode 50 for dielectric heating of food in the freeze/thaw chamber 12b, for example for thawing frozen food.
  • the first electrode 48 and the second electrode 50 are plate-shaped members made of a metal material. Also, the first electrode 48 and the second electrode 50 are arranged in the shield case 44 so as to face each other with a space therebetween. In the case of this embodiment, the first electrode 48 and the second electrode 50 face each other in the vertical direction (Z-axis direction) and are parallel to each other. A first electrode 48 and a second electrode 50 facing each other at a distance form therebetween a heating space HZ for dielectric heating of food.
  • a drawer 46 is provided in the heating module 40 such that it can be drawn in and out of the heating space HZ between the first electrode 48 and the second electrode 50 .
  • the first electrode 48 is arranged between the top plate portion 42c of the inner case 42 and the top plate portion 44b of the shield case 44.
  • a space that is, an air layer is provided between the shield case 44 and the first electrode 48 .
  • the second electrode 50 is arranged on the bottom plate portion 42d of the inner case 42 .
  • the refrigerator 10 is arranged between the first electrode 48 and the second electrode 50 as shown in FIG.
  • An oscillator 52 is provided to generate an AC voltage to be applied.
  • the oscillator 52 is, for example, an oscillator circuit board arranged in the machine room 12 e of the refrigerator 10 and electrically connected to the first electrode 48 and the second electrode 50 .
  • Oscillator 52 converts an AC voltage from power supply unit 54 of refrigerator 10 connected to a commercial power supply, and applies the converted AC voltage between first electrode 48 and second electrode 50 .
  • an AC voltage of a predetermined VHF band frequency eg, 40.68 MHz is applied.
  • the refrigerator 10 has a matching circuit 56 that matches the impedance between the first electrode 48 and the second electrode 50 .
  • Matching circuit 56 is, for example, a circuit board housed in heating module 40 .
  • a matching circuit 56 is electrically connected to the first electrode 48 and the second electrode 50 .
  • the second electrode 50 is grounded.
  • the role of the matching circuit 56 will be explained. As the frozen food is thawed, the number of water molecules in the food increases. As the number of water molecules increases, the impedance between the first electrode 48 and the second electrode 50 changes from its proper value and the reflectance increases. The reflectance is the ratio of the reflected wave returning to the oscillator 52 to the incident wave output from the oscillator 52 . As the reflectance increases, the dielectric heating of food becomes less efficient.
  • a matching circuit 56 is provided to maintain the impedance between the first electrode 48 and the second electrode 50 at a proper value.
  • the refrigerator 10 includes a reflected wave detection circuit 58 in order for the matching circuit 56 to maintain the impedance between the first electrode 48 and the second electrode 50 at a proper value.
  • the reflected wave detection circuit 58 is provided, for example, on a substrate arranged in the machine room 12e of the refrigerator 10 .
  • the control section 30 calculates the reflectance based on the incident wave output from the oscillation section 52 and the reflected wave detected by the reflected wave detection circuit 58 . Based on the calculated reflectance, the control unit 30 controls the matching circuit 56 so that the impedance between the first electrode 48 and the second electrode 50 becomes an appropriate value.
  • the control unit 30 causes the oscillation unit 52 to generate a heating start signal to generate an AC voltage. to cause the oscillator 52 to generate an AC voltage.
  • an alternating voltage is applied between the first electrode 48 and the second electrode 50, an alternating electric field is generated in the shield case 44 (the freezing/thawing chamber 12b), and the food is dielectrically heated by the alternating electric field. be done.
  • an alternating electric field is generated inside the freezing/thawing chamber 12b.
  • the shield case 44 shields the alternating electric field and suppresses leakage of the alternating electric field to the outside of the shield case 44 (freezing/thawing chamber 12b).
  • the door 12h is provided with a metal shield plate 12j covering the opening 44c of the shield case 44, as shown in FIG. is provided.
  • the oscillator 52 can generate an AC voltage only when the door opening/closing sensor 32B detects the closed door 12h.
  • the control unit 30 receives a thawing instruction from the user via the user interface 34, if the door opening/closing sensor 32B detects the closed door 12h, the oscillation unit A heating start signal is output to 52 .
  • the control unit 30 does not output the heating start signal to the oscillation unit 52, The user is notified via the user interface 34 to close the door 12h.
  • control unit 30 outputs a heating stop signal to oscillation unit 52, thereby causing oscillation unit 52 to stop generating AC voltage.
  • the AC voltage generation control of the oscillator 52 based on the open/closed state of the door 12h suppresses leakage of the alternating electric field to the outside of the shield case 44 (freezing/thawing chamber 12b).
  • the door open/close sensor 32B is a switch that detects the closed state of the door 12h by contacting the door 12h and is located outside the shield case 44. It is less susceptible to the generated alternating electric field. As a result, leakage of the alternating electric field to the outside of the shield case 44 is reliably suppressed.
  • the heating module 40 further has a drawer detection sensor 60 that detects the drawer 46, as shown in FIG. Specifically, the drawer detection sensor 60 detects the drawer 46 when the drawer 46 exists at a predetermined position between the first electrode 48 and the second electrode 50 .
  • the "predetermined position" referred to here is the position of the drawer 46 when the food to be heated stored in the drawer 46 is placed in the heating space HZ between the first electrode 48 and the second electrode 50. say the location.
  • a bottom surface 46a of the drawer 46 is provided with a marker 46b for presenting the user with the placement position of the food to be heated. That is, when the food to be heated is placed on the marker 46b and the drawer 46 is placed in a predetermined position, the food to be heated is placed in the heating space HZ between the first electrode 48 and the second electrode 50. and is properly dielectrically heated.
  • the drawer detection sensor 60 is a mechanical sensor provided at the opening edge 42e of the inner case 42 and in contact with the front end 46c of the drawer 46, as shown in FIGS. As a result, the drawer detection sensor 60 is provided outside the freezing/thawing chamber 12 b , that is, outside the shield case 44 . This allows the drawer detection sensor 60 to reliably detect the drawer 46 .
  • the drawer detection sensor 60 may erroneously detect the drawer 46.
  • the drawer sensor 60 is a Hall sensor that detects a magnetic field, it may malfunction due to an alternating electric field (magnetic field) generated inside the shield case 44 .
  • the drawer sensor 60 is a mechanical sensor, the contact surface of the drawer detection sensor 60 and the contact surface of the drawer 46 may stick to each other through ice. Also, the moving parts of the drawer detection sensor 60 may freeze and become unable to move properly. Therefore, the drawer detection sensor 60 is provided outside the radio wave irradiation space of the freezing/thawing chamber 12 b , that is, outside the space between the first electrode 48 and the second electrode 50 .
  • the oscillator 52 is enabled to generate AC voltage only when the drawer detection sensor 60 detects the drawer 46 existing at a predetermined position.
  • the drawer detection sensor 60 is electrically connected to the oscillator 52 .
  • the oscillator 52 receives a detection signal from the drawer detection sensor 60 indicating that the drawer 46 exists at a predetermined position, the oscillator 52 waits in a state in which an AC voltage can be generated.
  • the oscillation unit 52 in the standby state starts generating AC voltage.
  • the oscillation section 52 does not generate an AC voltage even if the heating start signal is received from the control section 30 .
  • the door opening/closing sensor 32B detects the closed door 12h
  • the drawer detection sensor 60 detects the drawer 46 existing at a predetermined position.
  • the oscillator 32 generates an alternating voltage to be applied between the first electrode 48 and the second electrode 50 .
  • the drawer 46 does not exist in a predetermined position, so that the food to be heated is placed in the heating space HZ between the first electrode 48 and the second electrode 50. is not properly positioned, the onset of dielectric heating is inhibited. As a result, insufficient thawing of food and wasteful power consumption are suppressed.
  • the oscillator 52 When the drawer 46 is pulled out from a predetermined position while the oscillator 52 is generating AC voltage (that is, during dielectric heating of the food), the AC voltage is generated when the drawer detection sensor 60 becomes unable to detect the drawer 46 existing at the predetermined position.
  • the oscillator 52 that is generating the voltage stops generating the AC voltage. In the case of this embodiment, when the detection signal from the drawer detection sensor 60 can no longer be received, the oscillator 52 stops generating the AC voltage.
  • the door 12h must first be opened in order to pull out the drawer 46 from the predetermined position while the oscillator 52 is generating AC voltage (that is, during the dielectric heating of the food). Therefore, when the door 12h is opened, the door opening/closing sensor 32B cannot detect the closed door 12h, and the oscillator 52 stops generating the AC voltage.
  • the oscillator 52 may generate AC voltage for some reason, for example, due to an erroneous detection of the door open/close sensor 32B. In this case, when the drawer 46 is pulled out from the predetermined position and the drawer detection sensor 60 cannot detect the drawer 46 existing at the predetermined position, the oscillator 52 stops generating the AC voltage.
  • the drawer detection sensor 60 is provided outside the freezing/thawing chamber 12b, that is, at the opening edge 42e of the inner case 42, and detects (contacts) the front end 46c of the drawer 46.
  • the drawer detection sensor 60 can also be provided at a position other than the opening edge 42 e of the inner case 42 . That is, the drawer detection sensor 60 should be located at a position where it can detect the drawer 46 arranged at a predetermined position.
  • the oscillator 52 may generate AC voltage for some reason.
  • the positions of the first electrode 48 and the second electrode 50 in the shield case 44 are defined. . Specifically, as shown in FIG. 4, a distance D1 from the front end 50a of the second electrode 50 to the opening 44c of the shield case 44 is defined. This distance D1 will be specifically described.
  • FIG. 7A is a diagram showing a simulation result of the spread of the alternating electric field in the front-rear direction.
  • FIG. 7B is a diagram showing a simulation result of horizontal expansion of the alternating electric field.
  • the alternating electric field generated by the AC voltage applied between the first electrode 48 and the second electrode 50 spreads in the front-rear direction (X-axis direction) inside the shield case 44 .
  • an alternating electric field generated by the AC voltage applied between the first electrode 48 and the second electrode 50 spreads in the shield case 44 in the horizontal direction (Y-axis direction).
  • Equation 1 The electric field strength E [V/mm] of the alternating electric field generated between the first electrode 48 and the second electrode 50 is, as shown in Equation 1, the difference between the first electrode 48 and the second electrode 50 It can be simply represented by the voltage V [V] between the first electrode 48 and the second electrode 50 and the distance D [mm] in the opposing direction (Z-axis direction) between the first electrode 48 and the second electrode 50 .
  • the voltage V can be expressed by Equation 2 using the output power W [w] of the oscillator 52 and the impedance Z [ ⁇ ].
  • the impedance Z is a target impedance value to be adjusted by the matching circuit 56 and is a fixed value. By equalizing the output impedance of the oscillator 52 and the impedance Z adjusted by the matching circuit 56, reflection of radio waves can be suppressed.
  • impedance Z is typically 50 ⁇ .
  • Equation 4 was found by experiment.
  • a distance D1 from the front end 50a of the second electrode 50 to the opening 44c of the shield case 44 is determined based on the output power W and the output impedance Z of the oscillator 52 so as to satisfy Equation 4.
  • the distance D1 determined in this way can suppress leakage of the alternating electric field to the outside of the shield case 44, that is, the freezing/heating chamber 12b.
  • the impedance Z (the output impedance of the oscillation unit 52) is 50 ⁇
  • the output power W is 100W
  • the distance D between the electrodes is 100mm
  • D1 is larger than 17.67mm. Leakage of the alternating electric field to the outside of the chamber 12b can be suppressed.
  • a relatively high intensity electric field is generated near the front end 48a of the first electrode 48, which is the end of the shield case 44 near the opening 44c. This occurs because the first electrode 48, unlike the second electrode 50, is an electrode that is not connected to ground.
  • the first electrode 48 unlike the second electrode 50, is an electrode that is not connected to ground.
  • FIG. It is farther from the opening 44c of the shield case 44 than the front end 50a of the second electrode 50 is.
  • the distance D2 from the left-right direction (Y-axis direction) side end 50b of the second electrode 50 to the inner wall surface 44d of the shield case 44 is also equal to the distance D1. similarly stipulated.
  • the distance D2 is determined based on the output power W and the output impedance Z of the oscillation section 52 so as to satisfy Equation 5, like the distance D1.
  • Equations 4 and 5 for determining the distance D1 and the distance D2 are the same. However, unlike Expression 4, Expression 5 is not a conditional expression for suppressing leakage of the alternating electric field to the outside of shield case 44 . Equation 5 is a conditional expression for suppressing formation of capacitance between the side end 50 b of the second electrode 50 and the inner wall surface 44 d of the shield case 44 . If the distance D2 does not satisfy Equation 5, a large capacitance is formed between the side end 50b of the second electrode 50 and the inner wall surface 44d of the shield case 44. That is, the electric field generated at the side end 50b of the second electrode 50 reaches the inner wall surface 44d of the shield case 44. As shown in FIG.
  • the distance D2 is determined so as to satisfy Equation (5).
  • a relatively high intensity electric field is generated in the vicinity of the side end 48b of the first electrode 48, as shown in FIGS. 5 and 7B. If the side edge 48b of the first electrode 48, which generates such a relatively high-intensity electric field, comes too close to the inner wall surface 44d of the shield case 44, there will be a large gap between the side edge 48b and the inner wall surface 44d. A large capacity is formed. The side edge 48b of the first electrode 48 is farther from the inner wall surface 44d of the shield case 44 than the side edge 50b of the second electrode 50 so as not to form a very large capacitance.
  • leakage of an alternating electric field to the outside from the heating space of a refrigerator that dielectrically heats food can be suppressed.
  • the door 12h and the drawer 46 are not connected in the above embodiment.
  • embodiments of the present invention are not limited to this.
  • FIG. 8 is a longitudinal sectional view of part of a refrigerator according to another embodiment of the present invention.
  • a door 112h that connects or separates the heating space HZ and the outside of the shield case 44 is connected to a drawer 46 that can be put into and taken out of the heating space HZ. ing. Therefore, when the door 112h opens, the drawer 46 moves forward.
  • the door 112h is not a door that rotates about a rotation center line extending in the vertical direction (Z-axis direction), but a door that can move in parallel in the front-rear direction (X-axis direction).
  • the drawer detection sensor is omitted.
  • the door opening/closing sensor 32B functions not only to detect opening/closing of the door 112h, but also as a drawer detection sensor.
  • the heating space HZ for thawing food is a part of the freeze/thaw chamber 12b for freezing food.
  • the entire freezing/thawing chamber 12b may be the heating space HZ.
  • the first electrode 48 and the second electrode 50 face each other in the vertical direction (Z-axis direction), as shown in FIGS.
  • the second electrode 50 located on the lower side is connected to the ground as shown in FIG.
  • this embodiment is not limited to this.
  • the first electrode and the second electrode may face each other in the vertical direction, and the upper first electrode may be connected to the ground.
  • the first electrode and the second electrode may face each other in the left-right direction (the width direction of the refrigerator).
  • the heating module 40 is provided with the freezing/thawing chamber 12b.
  • the heating module 40 is configured to permit food to be stored frozen in addition to dielectrically heating the food.
  • embodiments of the present invention are not limited to this. Heating module 40 may be used only for dielectric heating of food products. In this case, there is no need to introduce cold air into the heating module 40 .
  • the refrigerator according to the embodiment of the present invention includes a shield case having an opening on the front side for communicating the inside and the outside, made of a metal material, and a second 1 electrode and a second electrode arranged in the shield case so as to face the first electrode with a gap therebetween, and forming a heating space for dielectrically heating food between the first electrode and the first electrode.
  • an oscillating section for generating an alternating voltage to be applied between the first electrode and the second electrode; a door connecting or separating the heating space from the outside of the shield case; and the heating space.
  • the oscillator stops generating the AC voltage.
  • the present invention is applicable to refrigerators that can dielectrically heat food.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

L'invention concerne un réfrigérateur qui comprend : un carter de protection dans lequel une ouverture est disposée sur le côté avant et qui est fait à partir d'un matériau métallique ; une première électrode disposée à l'intérieur du carter de protection ; une seconde électrode disposée à l'intérieur du carter de protection de manière à faire face à la première électrode avec un espacement entre elles, la seconde électrode formant un espace de chauffage pour chauffer diélectriquement un produit alimentaire situé entre les première et seconde électrodes ; une partie d'oscillation pour générer une tension alternative devant être appliquée entre les première et seconde électrodes ; une porte qui relie ou sépare l'espace de chauffage et l'extérieur du carter de protection ; et un premier capteur pour détecter l'état fermé de la porte. Lorsque le premier capteur détecte que la porte dans l'état fermé, la partie d'oscillation génère la tension alternative. Si le capteur devient incapable de détecter l'état fermé de la porte alors que la tension alternative est générée par la partie d'oscillation, alors la génération de la tension alternative par la partie d'oscillation est arrêtée.
PCT/JP2022/036917 2021-10-12 2022-10-03 Réfrigérateur WO2023063134A1 (fr)

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JP2021-167541 2021-10-12

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Country Link
JP (1) JP2023057840A (fr)
CN (1) CN118119808A (fr)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678733A (ja) * 1992-09-07 1994-03-22 Matsushita Refrig Co Ltd 冷蔵庫
JP2012207900A (ja) * 2011-03-30 2012-10-25 Mitsubishi Electric Corp 冷蔵庫
WO2019202952A1 (fr) * 2018-04-18 2019-10-24 パナソニックＩｐマネジメント株式会社 Réfrigérateur
CN209893781U (zh) * 2019-01-23 2020-01-03 青岛海尔股份有限公司 加热装置及冰箱
JP2021060174A (ja) * 2019-10-09 2021-04-15 パナソニックＩｐマネジメント株式会社 冷蔵庫

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678733A (ja) * 1992-09-07 1994-03-22 Matsushita Refrig Co Ltd 冷蔵庫
JP2012207900A (ja) * 2011-03-30 2012-10-25 Mitsubishi Electric Corp 冷蔵庫
WO2019202952A1 (fr) * 2018-04-18 2019-10-24 パナソニックＩｐマネジメント株式会社 Réfrigérateur
CN209893781U (zh) * 2019-01-23 2020-01-03 青岛海尔股份有限公司 加热装置及冰箱
JP2021060174A (ja) * 2019-10-09 2021-04-15 パナソニックＩｐマネジメント株式会社 冷蔵庫

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JP2023057840A (ja) 2023-04-24

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