EP3948117A1 - Kältegerät und verfahren zum betreiben eines kältegeräts - Google Patents
Kältegerät und verfahren zum betreiben eines kältegerätsInfo
- Publication number
- EP3948117A1 EP3948117A1 EP20716731.3A EP20716731A EP3948117A1 EP 3948117 A1 EP3948117 A1 EP 3948117A1 EP 20716731 A EP20716731 A EP 20716731A EP 3948117 A1 EP3948117 A1 EP 3948117A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- food
- temperature
- storage chamber
- temperature sensor
- frozen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- 235000013305 food Nutrition 0.000 claims abstract description 89
- 230000007704 transition Effects 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000007710 freezing Methods 0.000 claims description 19
- 230000008014 freezing Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 8
- 235000013611 frozen food Nutrition 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 238000011161 development Methods 0.000 description 14
- 230000018109 developmental process Effects 0.000 description 14
- 230000003213 activating effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009885 systemic effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25D17/045—Air flow control arrangements
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B2/00—Preservation of foods or foodstuffs, in general
- A23B2/80—Freezing; Subsequent thawing; Cooling
-
- 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
Definitions
- the invention relates to a refrigeration device.
- the invention also relates to a method for operating a refrigeration device.
- phase transition temperature of the respective food in turn depends on the composition of the food. Salts, sugars, lipids, etc. determine the individual phase transition temperature.
- every food has an individual transition temperature depending on the composition.
- EP 228 21 49 discloses a cooling device and a method for controlling the same. The method includes lowering a temperature in a storage chamber to a freezing point temperature zone by adjusting the cold air supplied to the storage chamber and lowering the temperature in the storage chamber to a temperature below freezing point by increasing an amount of the cold air supplied to the storage chamber, if it is determined that a temperature of objects stored in the storage chamber in the freezing point temperature zone is stabilized by the cold air.
- the present invention creates a refrigeration device with a storage chamber for storing food, a temperature sensor which is set up to detect an individual phase transition temperature of a food to be frozen arranged in the storage chamber, at least one cooling unit and at least one fan, and a control unit, which for this purpose is designed when detecting the individual
- phase transition temperature of the food to be frozen arranged in the storage chamber by the temperature sensor, to increase a cooling output and / or to control the at least one fan, to increase a cold air flow supplied to the storage chamber.
- the present invention also provides a method for operating a refrigeration device.
- the method comprises providing the refrigeration device with a storage chamber for storing food.
- the method further comprises detecting an individual phase transition temperature of a food to be frozen arranged in the storage chamber by means of a temperature sensor.
- the method also includes providing at least one cooling unit and at least one fan and activating the cooling unit, increasing a cooling output and / or activating the at least one fan to increase a cold air flow supplied to the storage chamber upon detection of the individual phase transition temperature of the food to be frozen arranged in the storage chamber by the temperature sensor.
- One idea of the present invention is, by providing the
- phase transition temperature of the food to be frozen arranged in the storage chamber To detect the phase transition temperature of the food to be frozen arranged in the storage chamber, to automatically recognize the phase transition temperature of the respective food, so that the user of the freezer does not have to know this independently, but can still use the associated advantages of freezing while maintaining quality of the food.
- speed of the phase transition can be increased in such a way that it is passed through as quickly as possible and the quality of the frozen product is thus maintained as much as possible.
- the cooling unit has a first evaporator, the control unit being set up to, upon detection of the individual phase transition temperature of the food to be frozen arranged in the storage chamber, through the
- Temperature sensor to control the cooling unit to provide a maximum cooling capacity of the first evaporator.
- the phase transition of the food can be traversed using the first evaporator.
- the cooling unit has a second evaporator, the control unit being set up for the purpose of detecting the individual phase transition temperature of the food to be frozen arranged in the storage chamber to control the cooling unit by the temperature sensor, to switch on the second evaporator.
- control unit is set up to measure a speed of the at least one
- phase transition of the food can also be shortened accordingly by appropriate control of the fan in addition to or as an alternative to the control of the cooling unit.
- the temperature sensor is set up to measure the individual
- Phase transition temperature of the food to be frozen arranged in the storage chamber on the basis of a temperature plateau of the food that occurs during a freezing process of the food
- the temperature sensor is set up to detect the temperature plateau of the food occurring during the freezing process of the food if it is detected during a first predetermined period of time
- the temperature sensor is set up to detect the temperature plateau of the food occurring during the freezing process of the food if at least three of the detected temperature measurement values during the first specified time period are within the specified range.
- the specified range of the detected temperature measurement values is between 0.5 K and 2 K. In this way, an exact temperature determination of the individual phase transition of the food to be frozen arranged in the storage chamber can advantageously be made possible.
- control unit is set up to control the cooling unit, before and / or after a phase transition of the food to be frozen arranged in the storage chamber, to provide a lower cooling capacity than during the phase transition. Since it only depends on the fastest possible passage of the phase transition of the food to be frozen to ensure quality retention, the cooling capacity of the cooling unit can thus be reduced due to the precise detection of the phase transition before and after the phase transition. This also contributes to an energy-efficient freezing process for the food.
- the temperature sensor is provided by a core temperature sensor that can be inserted into the food to be frozen, a temperature sensor that detects the core temperature of the food to be frozen by detecting the temperature in the storage chamber, or a temperature sensor, in particular an infrared temperature sensor, which does this is set up to detect the temperature of the food to be frozen contactlessly, is designed.
- the selection of the temperature sensor can thus be adapted in an advantageous manner to corresponding structural or systemic requirements of the refrigeration device.
- the temperature sensor or the control unit is set up to
- corresponding food can also be calculated indirectly by detecting the temperature in the storage chamber.
- the refrigeration device is designed as a shock freezer or a conventional freezer.
- the present invention is thus advantageously versatile and can be integrated into a large number of existing devices.
- FIG. 1 shows a schematic representation of a refrigeration device according to a
- FIG. 2 shows a diagram of a temperature profile of a foodstuff to be frozen arranged in a storage chamber of the refrigeration device according to the preferred embodiment of the invention.
- FIG. 3 shows a flow chart of a method for operating a
- Refrigeration device according to the preferred embodiment of the invention.
- Fig. 1 shows a schematic representation of a refrigeration device according to a preferred embodiment of the invention.
- the refrigeration device 1 has a storage chamber 10 for storing food 12.
- the refrigeration device 1 also has a temperature sensor 14. Of the
- Temperature sensor 14 is set up to be an individual
- the refrigeration device 1 also has a cooling unit 16 and a fan 17.
- the refrigeration device 1 has a control unit 18, which is set up for the detection of the individual
- the cooling unit 16 has a first evaporator 16a.
- the control unit 18 is set up, upon detection of the individual
- the cooling unit 16 also has a second evaporator 16b.
- the second evaporator 16b is optional.
- the control unit 18 is set up to control the cooling unit 16 to switch on the second evaporator 16b.
- the control unit 18 is also set up to control a speed of the at least one fan 17 for changing a flow speed of the cold air supplied to the storage chamber 10.
- the speed of the at least one fan 17 should be detected when the
- Phase transition temperature T of the arranged in the storage chamber 10 to be frozen food 12 are increased, thereby a
- the temperature sensor 14 is set up to measure the individual
- phase transition temperature T of the food 12 to be frozen which is arranged in the storage chamber 10, on the basis of a temperature plateau of the food 12 that occurs during a freezing process of the food 12.
- the control unit 18 is also set up to control the cooling unit 16, before and / or after a phase transition of the food 12 to be frozen arranged in the storage chamber 10, to provide a lower cooling output than during the phase transition.
- the temperature sensor 14 is preferably formed by a core temperature sensor that can be inserted into the food 12 to be frozen.
- the temperature sensor 14 can, for example, by a
- Be designed temperature sensor which the core temperature of the food to be frozen 12 by detecting the temperature in the
- the temperature sensor 14 can be formed by a temperature sensor, in particular an infrared temperature sensor, which is set up to measure the temperature of the
- the temperature sensor 14 or the control unit 18 are configured to calculate the core temperature of the food 12 to be frozen arranged in the storage chamber 10 on the basis of the temperature recorded in the storage chamber 10.
- the refrigeration device 1 is preferably formed by a shock freezer.
- a shock freezer is a freezer in the conventional sense, but with increased cooling capacity to enable a quick freezing process.
- the refrigeration device 1 can be formed, for example, by a conventional freezer.
- FIG. 2 shows a diagram of a temperature profile of a foodstuff to be frozen arranged in the storage chamber of the refrigeration device according to the preferred embodiment of the invention.
- Temperature curve K2 shown.
- the first temperature profile K1 reproduces a conventional temperature profile of a food to be frozen which is arranged in a storage chamber of a refrigeration device.
- phase transition temperature T is reached usually characterized by a slight increase in temperature followed by a temperature plateau defined over time.
- the end of the temperature plateau thus corresponds to the end of the individual phase transition of the food, after which the temperature curve K1 drops again essentially constantly to lower temperatures.
- the refrigeration device according to the invention is designed to automatically detect the individual phase transition temperature T of the food 12 to be frozen located in the storage chamber 10, and thus, when the food enters the phase transition, a control unit 18 of the refrigeration device 1 is set up to control the cooling capacity of the cooling unit 16 and / or to increase the speed of the fan 17 to reduce the duration of the phase transition of the food to be frozen.
- the temperature curve K2 thus differs from the temperature curve K1 in a shorter period of time of the phase transition of the to be frozen
- the temperature sensor 14 is also set up to monitor the during the measurement
- the temperature sensor 14 is also set up to detect the temperature plateau of the food 12 occurring during the freezing process of the food 12 if at least three of the plateaus detected
- the temperature sensor 14 is also set up to detect an end of a phase transition of the food 12 to be frozen, which is arranged in the storage chamber 10, if predetermined during a second Time period T2 detected temperature measured values are below the specified range B or permanently fall below this.
- the specified range B of the detected temperature measurement values is between 0.5 K and 2 K.
- FIG. 3 shows a flow chart of a method for operating a
- the method comprises providing S1 the refrigeration device with a
- the method further comprises detecting S2 an individual phase transition temperature T of a food 12 to be frozen arranged in the storage chamber 10 by means of a temperature sensor 14.
- the method also includes providing S3 at least one cooling unit 16 and at least one fan 17 and activating S4 of cooling unit 16 to increase a cooling capacity and / or activating the at least one fan supplied to storage chamber 10
Landscapes
- 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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019204663.0A DE102019204663A1 (de) | 2019-04-02 | 2019-04-02 | Kältegerät und Verfahren zum Betreiben eines Kältegeräts |
| PCT/EP2020/058924 WO2020201200A1 (de) | 2019-04-02 | 2020-03-30 | Kältegerät und verfahren zum betreiben eines kältegeräts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3948117A1 true EP3948117A1 (de) | 2022-02-09 |
Family
ID=70165990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20716731.3A Withdrawn EP3948117A1 (de) | 2019-04-02 | 2020-03-30 | Kältegerät und verfahren zum betreiben eines kältegeräts |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3948117A1 (de) |
| DE (1) | DE102019204663A1 (de) |
| WO (1) | WO2020201200A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2529388A (en) * | 1946-11-04 | 1950-11-07 | Reynolds Metals Co | Process for accelerating the freezing of foods |
| FR2271521A1 (en) * | 1974-05-15 | 1975-12-12 | Anhydride Carbonique Ind | Small batches of food frozen with dry ice - sprayed on as ten or more successive layers |
| US4499738A (en) * | 1982-06-30 | 1985-02-19 | Tokyo Shibaura Denki Kabushiki Kaisha | Control device for a refrigerator |
| JPS61280369A (ja) * | 1985-06-05 | 1986-12-10 | 株式会社日立製作所 | 急速冷凍冷蔵庫 |
| EP0422280B1 (de) * | 1989-10-13 | 1993-01-07 | Sauerstoffwerk Friedrich Guttroff Gmbh | Verfahren und Einrichtung zum Kühlen und Gefrieren von wasserhaltigen Lebensmitteln |
| JP3950904B1 (ja) * | 2006-03-31 | 2007-08-01 | 日立アプライアンス株式会社 | 冷蔵庫 |
| DE102008047904A1 (de) * | 2008-08-25 | 2010-03-04 | Liebherr-Hausgeräte Ochsenhausen GmbH | Kühl- und/oder Gefriergerät sowie Verfahren zum Betreiben eines Kühl- und/oder Gefriergerätes |
| KR20110000836A (ko) | 2009-06-29 | 2011-01-06 | 삼성전자주식회사 | 냉동 장치 및 그 제어 방법 |
-
2019
- 2019-04-02 DE DE102019204663.0A patent/DE102019204663A1/de active Pending
-
2020
- 2020-03-30 EP EP20716731.3A patent/EP3948117A1/de not_active Withdrawn
- 2020-03-30 WO PCT/EP2020/058924 patent/WO2020201200A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020201200A1 (de) | 2020-10-08 |
| DE102019204663A1 (de) | 2020-10-08 |
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