CN111578595A - Super-ice-temperature refrigerator and food fresh-keeping method - Google Patents
Super-ice-temperature refrigerator and food fresh-keeping method Download PDFInfo
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- CN111578595A CN111578595A CN202010451418.XA CN202010451418A CN111578595A CN 111578595 A CN111578595 A CN 111578595A CN 202010451418 A CN202010451418 A CN 202010451418A CN 111578595 A CN111578595 A CN 111578595A
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Images
Classifications
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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
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
-
- 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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/16—Sensors measuring the temperature of products
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a super-ice-temperature refrigerator and a food fresh-keeping method, comprising a super-ice-temperature chamber and a freezing chamber, and also comprising: the alternating electric field generating device is arranged in the super-ice-temperature chamber and used for transmitting alternating frequency to pre-cool the super-ice-temperature chamber; the air duct system is communicated with the freezing chamber and the super-ice temperature chamber, and discharges cold air in the freezing chamber to the super-ice temperature chamber to cool the super-ice temperature chamber; the static magnetic field generating device is arranged in the super-ice-temperature chamber; for inhibiting the growth of ice crystals. The invention provides a super ice temperature refrigerator, which is characterized in that an alternating electric field generating device and a static magnetic field generating device are arranged in a super ice temperature chamber, and a freezing chamber and the super ice temperature chamber are communicated by an air duct system. The food is kept in a non-freezing state at low temperature, and the freshness and the eating quality of the food are ensured.
Description
Technical Field
The invention belongs to the technical field of freezing and refrigerating, and particularly relates to an ultra-ice-temperature refrigerator and a food preservation method.
Background
The super-ice-temperature storage technology is an ice-temperature technology which has long storage time and can maintain the high quality of fresh products in recent years, the fresh products are maintained in a super-cooled state below a freezing point without freezing by special techniques such as adjusting the cooling speed and the like, the special flavor of the fresh products is maintained, and compared with the ice-temperature storage technology, the storage period of the super-ice-temperature storage technology can be prolonged by more than 1 time.
In the super-ice-temperature storage process, the storage temperature is required to be between the freezing point and the damage point of the fresh product, and the temperature area is called the super-ice-temperature field. The super-ice-temperature field temperatures of different fresh products are different, the temperature area of the general vegetable and fruit super-ice-temperature field is lower, the temperature area of the poultry meat super-ice-temperature field is higher, the super-ice-temperature field of the conventional vegetable, fruit, poultry meat and the like is approximately in a certain temperature area between-15 ℃ and 0 ℃, and the requirement on temperature control precision is extremely high. The traditional refrigerator generally only has a refrigerating and fresh-keeping area above 0 ℃ and a freezing area below-18 ℃.
The current super-ice-temperature refrigerator is mainly realized through some phase-change materials and a concentration adjusting device, a salt solution in the concentration adjusting device easily corrodes a high-pressure pump for a long time, the solution is easily leaked, the temperature control capability is poor, and a semipermeable membrane is easily blocked by a particle solute. In addition, under low temperature environment, especially under the condition that food is not frozen, the free water content is high, some psychrophilic bacteria such as Listeria can still grow and propagate, so that the fresh food is putrefied and deteriorated, and the eating freshness and quality are reduced.
Disclosure of Invention
The invention aims to provide a super-ice-temperature refrigerator to solve the problems that in the prior art, when a phase-change material is used, solution leakage is easy to cause, the temperature control capability is poor, and food is easy to decay.
In order to achieve the purpose, the invention adopts the technical scheme that: the super ice temperature refrigerator comprises a super ice temperature chamber and a freezing chamber, and further comprises:
the alternating electric field generating device is arranged in the super-ice temperature chamber and used for transmitting alternating frequency to pre-cool the super-ice temperature chamber;
the air duct system is communicated with the freezing chamber and the super-ice temperature chamber, and discharges cold air in the freezing chamber to the super-ice temperature chamber to cool the super-ice temperature chamber;
a static magnetic field generating device arranged in the super-ice temperature chamber; for inhibiting the growth of ice crystals.
Furthermore, the static magnetic field generating device comprises a pair of Helmholtz coils, a direct current power supply module and a control panel; the control panel is used for controlling the strength of a magnetic field, one end of the control panel is connected with one of the Helmholtz coils, and the other end of the control panel is connected with the direct-current power supply module; one end of the direct current power supply module is connected with the control panel, and the other end of the direct current power supply module is connected with the other Helmholtz coil.
Further, the control panel comprises a switch gear and a plurality of adjusting gears corresponding to food types.
Further, the static magnetic field generator further includes a circuit protection device for protecting a circuit formed by connecting the dc power supply module, the control panel, and the helmholtz coil.
Further, the alternating electric field generating device comprises an alternating current power supply and an electrode plate connected with the alternating current power supply, and an output controller used for adjusting the output voltage and frequency of the electrode plate is connected between the electrode plate and the alternating current power supply.
Further, the alternating electric field generating device further comprises a transformer, and the transformer is arranged between the alternating current power supply and the output controller.
Furthermore, both ends of the transformer are also connected with a feedback control circuit for controlling the current stability of the electrode plate.
Furthermore, an object stage for bearing food is further arranged in the super-ice-temperature chamber, and the alternating electric field generating device is arranged in the object stage.
Furthermore, the air duct system comprises an air duct, an air inlet duct and an air return duct, wherein the air inlet duct is communicated with the freezing chamber and the super-ice temperature chamber, the air inlet duct is communicated with the air duct, one end, far away from the air inlet duct, of the air duct is closed, and the side wall of the air duct is provided with a plurality of openings.
Furthermore, an air duct controller is arranged in the air inlet duct and/or the air return duct, and the air duct controller is used for controlling the air speed and the flow of air flow exchange between the super-ice temperature chamber and the freezing chamber and the opening and closing of an air supply device.
Furthermore, a temperature sensor is further arranged in the super-ice-temperature chamber and is in communication connection with the air duct controller, and the temperature sensor feeds back the detected temperature in the super-ice-temperature chamber to the air duct controller.
Further, a thermocouple for detecting the temperature of the food is arranged in the super-ice-temperature chamber and is placed on the surface of the food.
Another object of the present invention is to provide a method for preserving food, comprising the steps of: starting an air supply device, acquiring a first preset temperature in the super-ice-temperature chamber, comparing the first preset temperature in the super-ice-temperature chamber with a first real-time temperature T1, judging whether the air supply device needs to be closed or not according to a comparison result, and putting food into the super-ice-temperature chamber;
after food is placed in the super-ice-temperature chamber, the air supply device and the alternating electric field generating device are started;
acquiring a second preset temperature of the food, comparing the second preset temperature with a second real-time temperature T2 of the food, and judging whether an air supply device needs to be turned off, an electric field generating device needs to be turned off and a static magnetic field generating device needs to be turned on according to a comparison result;
until the second real-time temperature T2 of the food item is maintained within the ultra-low-temperature storage range of the second preset temperature.
Further, the step of comparing the first real-time temperature T1 in the super-ice-temperature chamber with the first preset temperature and determining whether the air supply device needs to be turned off or not and food needs to be placed in the super-ice-temperature chamber according to the comparison result includes:
if b is not less than T1 is not less than a, putting the food into the super-ice-temperature chamber;
if T1 is more than a, the air supply device continues to operate until b is more than or equal to T1 and more than or equal to a;
if T1 is less than b, the air supply device is closed until b is less than or equal to T1 and less than or equal to a.
Further, the step of placing food into the super-ice-temperature compartment, turning on the air supply device, and comparing the second real-time temperature T2 of the food with the second preset temperature, and determining whether the air supply device needs to be turned off, the electric field generation device needs to be turned off, and the static magnetic field generation device needs to be turned on according to the comparison result includes:
if c is less than or equal to T2 and less than or equal to d, closing the alternating electric field generating device;
after the alternating electric field generating device is closed, if e is not less than T2 is not less than f, the static magnetic field generating device is opened;
after the static magnetic field generating device is started, if g is more than or equal to T2 and less than or equal to h, the temperature of the food is kept within the temperature changing range;
if T2 is less than g, the air supply device is closed until g is less than or equal to T2 and less than or equal to h.
The super ice temperature refrigerator provided by the invention has the beneficial effects that: compared with the prior art, the alternating electric field generating device and the static magnetic field generating device are used in the super-ice-temperature chamber, and the air duct system is used for discharging cold air in the freezing chamber into the super-ice-temperature chamber. In the precooling stage, the alternating electric field generating device generates an alternating electric field, so that water molecules are generated to resonate, the heat transfer between the water molecules is improved, and the super-ice greenhouse is cooled more quickly. In addition, the alternating electric field can also ionize air to generate ozone and negative ions, kill psychrophilic bacteria in a low-temperature environment and inhibit food spoilage. The alternating electric field and the air duct system enable cold air in the freezing chamber to flow to the super-ice temperature chamber, so that the temperature in the super-ice temperature chamber is reduced to be below zero, at the moment, the alternating electric field generating device needs to be closed, the temperature reduction is slowed down, the static magnetic field generating device is started to generate a static magnetic field, the static magnetic field enables water molecules to be directionally arranged, the contact between the water molecules is reduced, the generation of ice crystals is inhibited, the supercooling point of food is reduced, and the supercooling degree is improved. Inhibits the food spoilage and prolongs the fresh-keeping time of the food.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic cross-sectional structural view of a super ice temperature refrigerator provided in an embodiment of the present invention, and a part of the structure is not shown;
fig. 2 is a schematic structural diagram of an alternating electric field generating device according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a static magnetic field generating apparatus according to an embodiment of the present invention;
fig. 4 is a flowchart provided by an embodiment of the present invention.
Wherein, in the drawings, the reference numerals are mainly as follows:
1. a super-ice temperature chamber; 2. a freezing compartment;
3. an alternating electric field generating device; 31. an alternating current power supply; 32. an electrode plate; 33. an output controller; 34. a transformer; 35. a feedback control circuit;
4. an air duct system; 41. an air duct; 42. an air inlet duct; 43. an air return duct; 44. an air supply device; 45. an air duct controller; 46. a temperature sensor;
5. a static magnetic field generating device; 51. a Helmholtz coil; 52. a DC power supply module; 53. a control panel; 54. a circuit protection device;
6. an object stage; 7. a thermocouple; 8. a refrigerated compartment; 9. a food product.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 3 together, a super-ice-temperature refrigerator according to an embodiment of the present invention will be described. The super-ice-temperature refrigerator comprises a super-ice-temperature chamber 1, a freezing chamber 2 and a refrigerating chamber 8. In the embodiment, the super-ice-temperature chamber 1 is arranged between the freezing chamber 2 and the refrigerating chamber 8, wherein the freezing chamber 2 is arranged at the bottommost layer of the refrigerator. The super-ice-temperature refrigerator also comprises an alternating electric field generating device 3, an air duct system 4 and a static magnetic field generating device 5 which are arranged in the super-ice-temperature chamber 1. Wherein, under certain conditions, alternating electric field generating device 3 opens, and alternating electric field generating device 3 is used for producing the alternating electric field, and the frequency that the alternating electric field produced can take place resonance with water, improves the chance of meeting between the hydrone for the heat transfer between the hydrone for the temperature in super ice greenhouse 1 reduces more fast. The pre-cooling function is performed on the super-ice temperature chamber 1. The air duct system 4 is communicated with the freezing chamber 2 and the super-ice temperature chamber 1, and the air duct system 4 sends cold air in the freezing chamber 2 to the super-ice temperature chamber 1, so that the temperature in the super-ice temperature chamber 1 is rapidly reduced. After the pre-cooling stage is finished, the super-ice temperature chamber 1 starts the icing process, the alternating electric field generating device 3 is closed, the static magnetic field generating device 5 is started, the static magnetic field generating device 5 can generate a static magnetic field, the static magnetic field can enable water molecules to be directionally arranged, mutual contact among the water molecules is reduced, the effect of inhibiting the generation of ice crystals is achieved, the supercooling point of the food 9 is reduced, and the supercooling degree of the food 9 is improved.
Compared with the prior art, the super ice temperature refrigerator provided by the invention uses the alternating electric field generating device 3 and the static magnetic field generating device 5 in the super ice temperature chamber 1, and discharges cold air in the freezing chamber 2 into the super ice temperature chamber 1 by using the air duct system 4. In the precooling stage, the alternating electric field generating device 3 generates an alternating electric field, so that water molecules are generated to resonate, the heat transfer between the water molecules is improved, and the super-ice greenhouse 1 is cooled more quickly. In addition, the alternating electric field can also ionize air to generate ozone and negative ions, kill psychrophilic bacteria in a low-temperature environment and inhibit the putrefaction of the food 9. The alternating electric field and the air duct system 4 enable cold air in the freezing chamber 2 to flow to the super-ice temperature chamber 1, so that the temperature in the super-ice temperature chamber 1 is reduced to be below zero, at the moment, the alternating electric field generating device 3 needs to be turned off, the temperature reduction is slowed down, the static magnetic field generating device 5 is turned on to generate a static magnetic field, the static magnetic field enables water molecules to be directionally arranged, the contact among the water molecules is reduced, the generation of ice crystals is inhibited, the supercooling point of food 9 is reduced, and the supercooling degree is improved. The food 9 is prevented from being rotten, and the preservation time of the food 9 is prolonged.
Specifically, referring to fig. 1 and 2, the alternating electric field generator 3 includes an ac power supply 31, an electrode plate 32, and an output controller 33, the output controller 33 is connected between the ac power supply 31 and the electrode plate 32, and the output controller 33 is used for adjusting the output voltage and frequency of the electrode plate 32, so that the output voltage and frequency of the electrode plate 32 conform to the vibration frequency of water molecules in the super-ice greenhouse 1, so that the water molecules resonate, the chance of meeting the water molecules is improved, the heat transfer of the water molecules is increased, and the temperature in the super-ice greenhouse 1 is reduced more rapidly. In addition, since the ac power supply 31 is usually the same as the commercial power voltage and frequency in life, a transformer 34 is connected between the ac power supply 31 and the output controller 33, so that the voltage output from the electrode plate 32 is higher, and the required frequency is generated.
Preferably, in order to prevent the danger caused by the electrification of the electrode plate 32, a feedback control circuit 35 is connected to both ends of the transformer 34, so that the current generated by the electrode plate 32 is more stable to prevent the danger caused by the current generated by the electrode plate 32.
In addition, referring to fig. 1 and 2, an object stage 6 for carrying food is disposed in the super-ice-temperature compartment 1, and the food is placed on the object stage 6 when in use. The alternating electric field generator 3 mentioned above is disposed in the stage 6, and the stage 6 is disposed at the bottom of the super-ice-temperature compartment 1.
Referring to fig. 1, the air duct system 4 includes an air duct 41, an air inlet duct 42, an air return duct 43, and an air supply device 44, the air supply device 44 is disposed between the air duct 41 and the air inlet duct 42, the air supply device 44 supplies cold air in the freezing compartment 2 into the super-ice-temperature compartment 1, the air duct 41 communicates the super-ice-temperature compartment 1 with the air inlet duct 42, and the air inlet duct 42 and the air return duct 43 communicate the freezing compartment 2 with the super-ice-temperature compartment 1. The flow direction of the airflow is as follows: the freezing compartment 2 → the air inlet duct 42 → the air blowing device 44 → the air duct 41 → the super ice temperature compartment 1 → the air returning duct 43 → the freezing compartment 2. Wherein, the one end that the air duct 41 kept away from air inlet duct 42 is sealed, has evenly seted up a plurality of trompils on the air duct 41 for cold wind more evenly arranges to super ice temperature room 1 in from the air duct 41, makes the temperature in super ice temperature room 1 reduce more evenly.
Preferably, referring to fig. 1, a duct controller 45 is further disposed in the air inlet duct 42 and/or the air return duct 43, and the duct controller 45 is used for controlling the flow rate and the flow rate of the air flow exchange between the super-ice-temperature compartment 1 and the freezing compartment 2, and also controlling the opening and closing of the air supply device 44. The speed of reducing the temperature of the super-ice temperature chamber 1 is realized by the flow speed and the flow rate of the cold air flowing to the air pipe 41. The air supply device 44 is controlled to be opened and closed, so that the air supply of the super-ice temperature chamber 1 is started and stopped.
In addition, referring to fig. 1, a temperature sensor 46 (an infrared temperature sensor 46 is selected in this embodiment) is further disposed in the super-ice greenhouse 2, the temperature sensor 46 is in communication connection with the air duct controller 45, and the temperature sensor is configured to detect a temperature in the super-ice greenhouse 1 and feed the detected temperature back to the air duct controller 45, so that the air duct sensor adjusts the air supply device 44 according to temperature information fed back by the temperature sensor 46, so as to implement reasonable temperature drop adjustment according to a real-time temperature in the super-ice greenhouse 1, or determine whether to turn on or turn off the ac electric field generating device, and how to adjust the air supply device 44. The thermocouple 7 is arranged in the super-ice-temperature chamber 1, the thermocouple 7 is used for being placed on the surface of the food 9 and used for detecting the real-time temperature of the food 9, the thermocouple 7 is in communication connection with the temperature sensor 46, and the thermocouple 7 is used for detecting the temperature of the food 9 and determining the opening and closing time of the alternating electric field generating device 3, the opening and closing of the air supply device 44 and when to open the static magnetic field generating device 5 according to the real-time temperature of the food 9 in the super-ice-temperature chamber 1.
Specifically, referring to fig. 1 and 3, the static magnetic field generator 5 includes a pair of helmholtz coils 51 (disposed on two opposite sidewalls of the super-ice thermal chamber 1 in the present embodiment), a dc power supply module 52, and a control panel 53, wherein one end of the control panel 53 is connected to one of the helmholtz coils 51, and the other end is connected to the dc power supply module 52; one end of the dc power supply module 52 is connected to the control panel 53, and the other end is connected to the other helmholtz coil 51. The control panel 53 is used to control the strength of the generated magnetic field, in this embodiment, the control panel 53 includes a switch position, a fruit and vegetable position, and a meat position, for example, when the stored food 9 is meat, the control panel 53 can be adjusted to the meat position. Of course, the food 9 stored in the super-ice-temperature compartment 1 may be of many types, and various gears or continuously adjusted types may be designed according to actual conditions and actual design requirements, which are not described in detail herein.
The static magnetic field is applied to the supercooling stage of the food 9, and the supercooling degree of the food 9 is improved by combining the air duct system 4, so that the temperature area of the super-ice-temperature storage of the food 9 is enlarged.
In addition, referring to fig. 1 and fig. 3, the electric field generator further includes a circuit protection device 54, and the circuit protection device 54 is used for protecting a circuit formed by connecting the dc power module 52, the control panel 53 and the helmholtz coil 51. The danger of overcurrent or overvoltage of the circuit is prevented, and the like. The safety of the circuit in the static magnetic field generating device 5 is improved.
Referring to fig. 4, the present invention further provides a method for preserving food 9, wherein the method for preserving food 9 is used for storing food 9 in the super-ice temperature chamber 1, and comprises the following steps:
firstly, starting an air supply device 44, acquiring a first preset temperature in the super-ice-temperature chamber 1, comparing the first preset temperature with a first real-time temperature T1, and judging whether the air supply device 44 needs to be closed or not and putting the food 9 into the super-ice-temperature chamber 1 according to a comparison result;
after the food 9 is put into the super-ice temperature chamber 1, the air supply device 44 and the alternating electric field generating device 3 are started;
if the b is more than or equal to T1 and less than or equal to a, putting the food 9 into the super-ice temperature chamber 1;
if T1 is greater than a, the air supply device 44 continues to operate until b is less than or equal to T1 is less than or equal to a;
if T1 is less than b, the air supply device 44 is closed until b is less than or equal to T1 and less than or equal to a.
Acquiring a second real-time temperature of the food 9, comparing the second real-time temperature T2 of the food 9 with a second preset temperature, and judging whether the air supply device 44 needs to be turned off, the electric field generating device needs to be turned off and the static magnetic field generating device 5 needs to be turned on according to the comparison result;
putting the food 9 into the super-ice temperature chamber 1, starting the air supply device 44, and if c is less than or equal to T2 and less than or equal to d, closing the alternating electric field generating device 3;
after the alternating electric field generating device 3 is closed, if the e is less than or equal to T2 and less than or equal to f, the static magnetic field generating device 5 is started;
after the static magnetic field generating device 5 is started, if g is more than or equal to T2 and less than or equal to h, the temperature of the food 9 is kept in the temperature changing range;
if T2 is less than g, the air supply device 44 is closed until g is less than or equal to T2 and less than or equal to h.
Until the second real-time temperature T2 of the food product 9 is maintained within the ultra-low-temperature storage range of the second preset temperature.
The alternating electric field is applied to the precooling stage of the food 9, so that the heat transfer rate of the food 9 is improved, and the internal and external temperatures of the food 9 are quickly consistent. The static magnetic field can make the water molecules generate directional arrangement, reduce the contact between the water molecules and generate ice crystals all the time, thereby reducing the supercooling point of the food 9 and improving the supercooling degree. The supercooling stage of the food 9 is introduced by the static magnetic field, the air duct system 4 is combined, the supercooling degree of the food 9 is improved, the temperature area of the super-ice-temperature storage of the food 9 is enlarged, and the temperature control program is combined, so that the problem that the food 9 is frozen due to temperature shifting of the super-ice-temperature chamber 1 can be solved. Meanwhile, the air duct system 4 can maintain the air pressure balance of the super-ice temperature chamber 1, and can utilize the redundant cold energy of the freezing chamber 2, thereby reducing the starting times of the compressor of the unit and reducing the energy consumption.
Referring to fig. 1 to 4, the super-ice-temperature refrigerator and the method for keeping food 9 fresh are as follows:
the super-ice-temperature refrigerator comprises a refrigerating chamber 8, a super-ice-temperature chamber 1 and a freezing chamber 2, wherein the super-ice-temperature chamber 1 is used for providing a super-cooling storage environment; the air duct system 4 is used for providing cold energy for the super-ice temperature chamber 1, and the temperature control program is used for adjusting the temperature in the chamber; a temperature sensor 46 for detecting the temperature in the super-ice temperature compartment 1; an alternating electric field generator 3 and a static magnetic field generator 5 for realizing the super ice temperature state of the food 9, and the alternating electric field generator 3 is also used for killing psychrophilic bacteria in the super ice temperature chamber 1.
The super-freezing technology is based on the ice-temperature technology, the food 9 is stored in a temperature area above a damage point (supercooling point) below a freezing point, the food 9 is in a non-freezing state, the original tissue and flavor of the food 9 are ensured compared with the traditional-18 ℃ freezing storage, and the storage period of the food 9 can be effectively prolonged compared with the ice-temperature technology. The key point of this technique is how to keep the food 9 in a supercooled state, which is currently mainly achieved by adjusting the cooling rate of the food 9. However, in the pre-cooling stage, in order to make the internal and external temperatures of the food 9 uniform, not only the time consumption but also the cold consumption are large. Research shows that the alternating electric field can generate resonance with water to accelerate heat transfer between water molecules. Based on this, the invention applies the alternating electric field to the precooling stage of the food 9, improves the heat transfer rate of the food 9, and leads the internal and external temperatures of the food 9 to be consistent rapidly. The static magnetic field can make the water molecules generate directional arrangement, reduce the contact between the water molecules and inhibit the generation of ice crystals, thereby reducing the supercooling point of the food 9 and improving the supercooling degree. Based on this, the invention applies the static magnetic field to the supercooling stage of the food 9, combines with the air duct system 4, improves the supercooling degree of the food 9, enlarges the temperature area for storing the food 9 with super-ice temperature, and combines with the temperature control program, thereby avoiding the problem of freezing the food 9 caused by temperature fluctuation of the super-ice temperature chamber 1. Meanwhile, the air duct system 4 can maintain the air pressure balance of the super-ice temperature chamber 1, and can utilize the redundant cold energy of the freezing chamber 2, thereby reducing the starting times of the compressor of the unit and reducing the energy consumption.
In a low-temperature environment, particularly under the condition that the food 9 is not frozen, the free water content in the food 9 is high, some psychrophilic bacteria such as listeria can grow and propagate to cause the fresh food 9 to go bad, and if the food 9 polluted by the bacteria is eaten by mistake, users can have adverse symptoms such as abdominal pain, diarrhea, fever and the like, and even septicemia. The alternating electric field ionizes the air to generate ozone and negative ions, and the substances have a sterilization effect, so that the application of the alternating electric field can also kill psychrophilic bacteria and inhibit the food 9 from going bad.
In conclusion, the invention can keep the fresh food 9 in the low-temperature storage environment without freezing, greatly prolong the storage period of the food 9, ensure the freshness of the food 9 and improve the eating quality of the food 9.
According to the invention, the alternating electric field and the static magnetic field act on the low-temperature storage process of the food 9, and the temperature control system is combined, so that the food 9 is kept in a non-freezing state at low temperature, and the freshness and the eating quality of the food 9 are ensured.
Opening a temperature control program in the super-ice temperature chamber 1, and adjusting an air duct system 4 between the freezing chamber 2 and the super-ice temperature chamber 1 to stabilize the temperature at T1, wherein the specific temperature control method comprises the following steps: the infrared temperature sensor 46 measures the temperature inside the super-ice temperature chamber 1 in real time; when the current temperature of the super-ice-temperature chamber 1 is higher than the preset temperature a (4 ℃ at this time), the air duct controller 45 controls the air supply device 44 (a fan and an electric air door are adopted in the embodiment, the same is applied below) to start, the air inlet duct 42 sucks cold air in the freezing chamber 2 to rapidly cool the super-ice-temperature chamber 1, and when the temperature measured by the infrared temperature sensor 46 is lower than the preset temperature b (1 ℃ at this time), the air duct controller 45 controls the fan and the air duct to stop working. The air duct system 4 is composed of an air duct controller 45, a fan and a motor, an air inlet duct 42, an air duct 41 and an air return duct 43. Wherein, the air duct controller 45 can adjust the opening size of the air inlet duct and the air outlet duct to control the air speed so as to adjust the temperature of the super-ice temperature chamber 1; the air inlet duct 42 is further connected with an air duct 41 with a closed end, and the side wall of the air duct 41 is provided with a plurality of openings for rapidly and uniformly conveying cold air from the freezing compartment 2 to each corner of the super-ice temperature compartment 1, so that the temperature in the super-ice temperature compartment 1 is rapidly reduced and kept consistent. The air return duct 43 is used for returning the cold air in the super-ice-temperature chamber 1 to the freezing chamber 2. The air duct system 4 not only maintains the air pressure balance of the super-ice temperature chamber 1, but also can utilize the redundant cold energy of the freezing chamber 2, reduce the starting times of the compressor of the unit and reduce the energy consumption. Optionally, the value of T1 in the implementation method is more than or equal to 1 ℃ and less than or equal to 4 ℃ in T1, and the optimal temperature T1 is more than or equal to 2 ℃ and less than or equal to 3 ℃ in T1.
The door body of the super-ice-temperature chamber 1 is opened, the food 9 to be stored is placed on the objective table 6, and the inner wall and the door body of the super-ice-temperature chamber 1 are both made of materials with magnetic field and electric field shielding effects and good heat insulation effects.
The door body of the super-ice-temperature chamber 1 is closed, and the sealing performance between the door body and the chamber is good.
And continuously operating Amin by an air duct temperature control program, and starting the electric field generating device. The electric field generating device is composed of the following components: an AC power source 31, a transformer 34, a feedback control circuit 35, an output controller 33 and an electrode plate 32. Wherein the input voltage of the ac power supply 31 is 220V, the frequency is 50 Hz, the winding ratio of the transformer 34 is 1:10, and the output controller 33 is used for adjusting the output voltage and the corresponding frequency at the electrode plate 32; the electrode plate 32 is composed of a metal sheet and a jacket (with holes) made of insulating materials, is embedded in the objective table 6 (the objective table 6 is of a hollow structure, and the side wall of the objective table has a plurality of holes), cannot generate electric shock hazard, and is in a high/low potential conversion state, and forms an electric field with the surrounding environment of zero potential. The alternating electric field ionizes the air to generate ozone and negative ions, which are dispersed to each region of the chamber from the inside of the objective table 6 through the side wall openings under the action of the cold air, and the substances have a sterilization effect and can kill psychrophilic bacteria such as Listeria. In addition, the alternating electric field can resonate with water molecules to accelerate heat transfer among the water molecules, so that the temperature inside and outside the cells of the food 9 can be quickly uniform and consistent. At this time, the output voltage at the electrode plate 32 is adjusted by the output controller 33 to be 1800V-2000V, and the frequency is 100 Hz.
And (3) continuously opening the electric field generating device for a certain time, continuously operating the temperature control program in the super-ice temperature chamber 1, and turning off the electric field generating device until the central temperature of the food 9 to be stored is measured to be T2 by the thermocouple 7, wherein the preset temperature d is-1 ℃ and the preset temperature c is-2 ℃. In the optional method, the temperature T2 is more than or equal to-1.5 ℃ and less than or equal to-0.5 ℃, and the optimal temperature T2 meets the temperature of more than or equal to-1 ℃ and less than or equal to T2 and less than or equal to-0.8 ℃. The running time A is more than or equal to 45 min and less than or equal to 120 min, and the optimal running time A meets the condition that A is more than or equal to 60 min and less than or equal to 90 min.
And continuously operating the temperature control program in the super-ice-temperature room 2 for Bmin, wherein the preset temperature f is-3 ℃, and the preset temperature e is-4 ℃ until the central temperature of the food 9 to be stored is measured to be T2 which is more than or equal to-2 ℃ and less than or equal to-1 ℃ by a thermocouple 7, and starting the magnetic field generating device. Wherein the magnetic field generating device is composed of the following components: helmholtz coils 51 provided on both right and left sides of the super ice temperature compartment 1; a dc power supply module 52 supplying power to the helmholtz coil 51209 to generate a magnetic field, which inputs a dc voltage of not more than 36V; a circuit protection device 54 for protecting the circuit of the magnetic field generating device to avoid line faults such as overload, electric leakage and short circuit; the magnetic field generating device controls the panel 53 to adjust the intensity of the uniform magnetic field. The specific operation method comprises the following steps: the knob on the control panel 53 of the magnetic field generating device is turned from "OFF" to "1" or "2" position, at which time the device generates a uniform magnetic field. Wherein, if the food 9 to be stored is fruit, the knob on the control panel 53 is turned to the 1 position, and if the food 9 to be stored is meat, the knob on the control panel 53 is turned to the 2 position. The intensity of the uniform magnetic field corresponding to the 1 st gear is 1.5 mT, and the intensity of the uniform magnetic field corresponding to the 2 nd gear is 5 mT. In the optional method, the temperature T2 is more than or equal to-2 ℃ and less than or equal to-1 ℃, and the optimal temperature T2 meets the temperature of more than or equal to-1.8 ℃ and less than or equal to T2 and less than or equal to-1.5 ℃. The running time B is more than or equal to 30 min and less than or equal to 60 min, and the optimal running time B meets the condition that B is more than or equal to 30 min and less than or equal to 45 min.
The temperature control program in the super-ice temperature chamber 1 is continuously operated, the preset temperature h is-6 ℃, the preset temperature g is-8 ℃, the magnetic field generating device is not closed, and the central temperature of the food 9 to be stored is measured by the thermocouple 7. In the optional method, the temperature is between 6 ℃ below zero and T2 ℃ below zero and 4 ℃ below zero, and the optimal temperature is between 5 ℃ below zero and T2 ℃ below zero and 4.5 ℃.
The storage temperature of the super-ice greenhouse 1 is a temperature value corresponding to the central temperature T2 of the food 9 to be stored, and meets the requirements that the temperature is more than or equal to minus 8 ℃ and less than or equal to T2 and less than or equal to minus 6 ℃, in the subsequent storage process, the magnetic field generating device is continuously started, and the temperature control program is continuously operated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (15)
1. Super ice temperature refrigerator, including super ice temperature room, freezing room, its characterized in that still including setting up super ice temperature is indoor:
the alternating electric field generating device is used for transmitting alternating frequency to pre-cool the super-ice temperature chamber;
the air duct system is communicated with the freezing chamber and the super-ice temperature chamber, and discharges cold air in the freezing chamber to the super-ice temperature chamber to cool the super-ice temperature chamber;
a static magnetic field generator for generating a static magnetic field and suppressing the growth of ice crystals in a supercooling stage.
2. The super ice temperature refrigerator of claim 1, wherein: the alternating electric field generating device comprises an alternating current power supply and an electrode plate connected with the alternating current power supply, and an output controller used for adjusting the output voltage and frequency of the electrode plate is connected between the electrode plate and the alternating current power supply.
3. The super ice temperature refrigerator of claim 2, wherein: the alternating electric field generating device further comprises a transformer, and the transformer is connected between the alternating current power supply and the output controller.
4. A super ice temperature refrigerator as claimed in claim 3, wherein: and the two ends of the transformer are also connected with a feedback control circuit for controlling the current stability of the electrode plate.
5. The super ice temperature refrigerator of claim 1, wherein: an object stage for bearing food is further arranged in the super-ice-temperature chamber, and the alternating electric field generating device is arranged in the object stage.
6. The super ice temperature refrigerator of claim 1, wherein: the air duct system comprises an air duct, an air inlet duct and an air return duct, the air duct is communicated with the super-ice-temperature chamber and the air inlet duct, the air inlet duct and the air return duct are communicated with the freezing chamber and the super-ice-temperature chamber, and an air supply device for sending cold air into the air duct is arranged between the air duct and the air inlet duct; the air pipe is far away from one end of the air inlet duct is closed, and a plurality of openings are formed in the side wall of the air pipe.
7. The super ice temperature refrigerator of claim 6, wherein: and an air duct controller is arranged in the air inlet duct and/or the air return duct and is used for controlling the flow speed and flow of air flow exchange between the super-ice temperature chamber and the freezing chamber and the opening and closing of an air supply device.
8. An ultra-cold temperature refrigerator as claimed in claim 7, wherein: the temperature sensor is arranged in the super-ice-temperature chamber and is in communication connection with the air duct controller, and the temperature sensor feeds the detected temperature in the super-ice-temperature chamber back to the air duct controller.
9. The super ice temperature refrigerator of claim 8, wherein: the ultra-ice-temperature chamber is also internally provided with a thermocouple for detecting the temperature of food, the thermocouple is used for being placed on the surface of the food, and the thermocouple is in communication connection with the temperature sensor.
10. The super ice temperature refrigerator of claim 1, wherein: the static magnetic field generating device comprises a pair of Helmholtz coils, a direct current power supply module and a control panel; the control panel is used for controlling the strength of a magnetic field, one end of the control panel is connected with one of the Helmholtz coils, and the other end of the control panel is connected with the direct-current power supply module; one end of the direct current power supply module is connected with the control panel, and the other end of the direct current power supply module is connected with the other Helmholtz coil.
11. The super ice temperature refrigerator of claim 10, wherein: the control panel comprises a switch gear and a plurality of adjusting gears corresponding to food types.
12. The super ice temperature refrigerator of claim 10, wherein: the static magnetic field generating device further includes a circuit protection device for protecting a circuit formed by connecting the dc power supply module, the control panel, and the helmholtz coil.
13. The food fresh-keeping method is characterized by comprising the following steps:
starting an air supply device, acquiring a first preset temperature in the super-ice-temperature chamber according to any one of claims 1-12, comparing the first preset temperature in the super-ice-temperature chamber with a first real-time temperature T1, and judging whether the air supply device needs to be turned off or not and food needs to be placed in the super-ice-temperature chamber according to the comparison result;
after food is placed in the super-ice-temperature chamber, the air supply device and the alternating electric field generating device are started;
acquiring a second preset temperature of the food, comparing the second preset temperature with a second real-time temperature T2 of the food, and judging whether an air supply device needs to be turned off, an electric field generating device needs to be turned off and a static magnetic field generating device needs to be turned on according to a comparison result;
until the second real-time temperature T2 of the food item is maintained within the ultra-low-temperature storage range of the second preset temperature.
14. The method for keeping food fresh as claimed in claim 13, wherein the comparing the first real-time temperature T1 in the super-ice-temperature compartment with the first preset temperature and determining whether the air supply device needs to be turned off and the food needs to be placed in the super-ice-temperature compartment according to the comparison result comprises:
if b is not less than T1 is not less than a, putting the food into the super-ice-temperature chamber;
if T1 is more than a, the air supply device continues to operate until b is more than or equal to T1 and more than or equal to a;
if T1 is less than b, the air supply device is closed until b is less than or equal to T1 and less than or equal to a.
15. The method for keeping food fresh as claimed in claim 13, wherein the steps of putting food into the super-ice-temperature compartment, turning on the blowing means, comparing the second real-time temperature T2 of the food with the second preset temperature, and determining whether the blowing means needs to be turned off, the electric field generating means needs to be turned off, and the static magnetic field generating means needs to be turned on based on the comparison result comprise:
if c is less than or equal to T2 and less than or equal to d, closing the alternating electric field generating device;
after the alternating electric field generating device is closed, if e is not less than T2 is not less than f, the static magnetic field generating device is opened;
after the static magnetic field generating device is started, if g is more than or equal to T2 and less than or equal to h, the temperature of the food is kept within the temperature changing range;
if T2 is less than g, the air supply device is closed until g is less than or equal to T2 and less than or equal to h.
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Application publication date: 20200825 |
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| RJ01 | Rejection of invention patent application after publication |