Method for operating a refrigeration device and a refrigeration device

Abstract

The invention relates to a method (10a; 10b) for operating a refrigeration unit (12a), wherein in at least one detection step (14a; 14b) a pressure in at least one interior space (18a) of the refrigeration unit (12a) is detected by means of at least one sensor unit (16a) of the refrigeration unit (12a), wherein in at least one analysis step (20a; 20b) the detected pressure is evaluated by means of at least one evaluation unit (22a) of the refrigeration unit (12a), and wherein, depending on a result of the at least one analysis step (20a; 20b), at least one door opening step (24a) is triggered to open at least one refrigeration unit door (26a) of the refrigeration unit (12a).In order to provide a generic method (10a; 10b) with improved properties with regard to user comfort and / or efficiency of use, it is proposed that at least one analysis step (20a; 20b) is initiated when the detected pressure exceeds an activation threshold (28a; 28b), wherein in the at least one analysis step (20a; 20b) a pressure profile above an opening threshold (30a; 30b) different from the activation threshold (28a; 28b) is evaluated.

Description

[0001] The invention relates to a method for operating a refrigeration device and to a refrigeration device.

[0002] From the prior art, for example DE 10 2014 203 683 A1, a method for operating a refrigeration appliance is already known, wherein in at least one detection step, in particular by means of at least one sensor unit of the refrigeration appliance, a pressure of an interior of the refrigeration appliance is detected, and wherein in at least one analysis step the detected pressure is evaluated by means of at least one evaluation unit of the refrigeration appliance, and wherein depending on a result of the analysis step an opening of a refrigeration appliance door of the refrigeration appliance is triggered.

[0003] The object of the invention is, in particular but not limited to, providing a generic method with improved properties with regard to user comfort and / or efficiency of use. This object is achieved according to the invention by the features of claims 1 and 11, while advantageous embodiments and further developments of the invention can be found in the dependent claims.

[0004] The invention relates to a method for operating a refrigeration unit, wherein in at least one detection step a pressure in at least one interior space of the refrigeration unit is detected by means of at least one sensor unit of the refrigeration unit, wherein in at least one analysis step the detected pressure is evaluated by means of at least one evaluation unit of the refrigeration unit, and wherein, depending on a result of the at least one analysis step, at least one door opening step is triggered to open at least one door of the refrigeration unit.

[0005] It is proposed that at least one analysis step be initiated when the detected pressure exceeds an activation threshold, whereby in the at least one analysis step a pressure profile above an opening threshold that differs from the activation threshold is evaluated.

[0006] This design of the operating procedure for the refrigeration unit allows for advantageously high utilization efficiency, particularly advantageously high energy efficiency. Advantageously low average computing power can be provided by the evaluation unit, since the evaluation unit does not need to continuously analyze the measured pressure, but only when the measured pressure meets predetermined conditions. Furthermore, advantageously precise determination of a user's door opening request can be enabled, thereby providing particularly advantageously high user comfort.

[0007] Preferably, a pressure change is generated by moving the at least one door of the refrigeration unit, particularly by a user of the refrigeration unit. Advantageously, the pressure change is generated by a pressure force exerted by the operator on the at least one door. Preferably, in the at least one detection step, an absolute pressure in the at least one interior space of the refrigeration unit is detected by means of the at least one sensor unit. Alternatively, it is conceivable that in the at least one detection step, a relative pressure or a differential pressure, particularly relative to the atmospheric pressure at the installation location of the refrigeration unit, is detected.

[0008] InIn at least one door-opening step of the method, the at least one refrigerator door is preferably moved from a closed position to an open, and in particular, not closed, position by means of at least one door-opening unit of the refrigerator. A "closed position" of the at least one refrigerator door is understood to mean, in particular, that the at least one refrigerator door seals the at least one interior space of the refrigerator, especially from the outside ambient air of the refrigerator. An "open position" of the at least one refrigerator door is understood to mean, in particular, that the at least one refrigerator door does not seal the at least one interior space.In particular, in at least one door opening step, the at least one refrigerator door is opened by means of the at least one door opening unit to such an extent that a user can further open the at least one refrigerator door, preferably without a special handle element.

[0009] Preferably, the activation threshold is stored in a memory unit of the evaluation unit and / or in a memory unit of the sensor unit. Preferably, in at least one comparison step of the method, in particular by means of the at least one sensor unit or a comparator interposed between the at least one sensor unit and the at least one evaluation unit, the detected pressure is compared with the activation threshold. Preferably, depending on whether the detected pressure exceeds the activation threshold as detected in the at least one comparison step, an activation signal is sent to the at least one evaluation unit to initiate the at least one analysis step. Preferably, the opening threshold is stored in the at least one memory unit of the evaluation unit. Preferably, the opening threshold is greater than the activation threshold.

[0010] Preferably, in at least one further detection step, in particular by means of at least one further sensor of the refrigeration unit, at least one position parameter of the at least one refrigeration unit door is detected. Preferably, in at least one interior state determination step of the method, in particular by means of the at least one evaluation unit or control electronics of the at least one further sensor, a state open by means of the at least one refrigeration unit door and / or a state closed by means of the at least one refrigeration unit door is detected as a function of the detected position parameter of the at least one refrigeration unit door. In particular, an open signal or a closed signal is sent to the at least one evaluation unit as a function of the detected position parameter of the at least one refrigeration unit door.For example, the at least one position parameter of the at least one refrigerator door includes a detected angle between the at least one refrigerator door relative to a mounting axis of the at least one refrigerator door on at least one body of the refrigerator and the at least one body, or a detected distance of an edge opposite the mounting axis, in particular parallel, in particular a door frame, which connects at least one refrigerator door to the at least one body, or a door contact status of a contact switch or magnetic switch, or a resistance or a capacitance.A state of the at least one interior space that is open by means of the at least one refrigerator door can be detected in the at least one interior space state determination step if, for example, a detected angle of 10° between the at least one refrigerator door relative to the mounting axis of the at least one refrigerator door on the at least one body and the at least one body is greater than or equal to 10°, or if a resistance signal detected by means of the at least one sensor corresponds in particular to at least 70%, advantageously at least 80%, preferably at least 90% to an original resistance value.In particular, in the at least one interior state determination step, a closed state of the at least one interior space by means of the at least one refrigerator door can be detected by means of the at least one evaluation unit if, for example, the detected angle is less than 10° or the resistance signal detected by means of the at least one sensor is less than 70%, advantageously less than 80%, preferably less than 90% compared to the original resistance value.

[0011] It is conceivable that a pressure reference value is stored in the storage unit of the at least one evaluation unit. Preferably, the pressure reference value is defined as an atmospheric pressure at the installation location of the refrigeration unit in at least one pressure reference determination step of the method, in particular by means of the at least one evaluation unit and / or the at least one sensor unit. In particular, the atmospheric pressure at the installation location of the refrigeration unit is only detected if the state of the at least one interior space, as determined by the at least one refrigeration unit door being open, is recognized in the at least one interior space state determination step, depending on the detected position parameter of the at least one refrigeration unit door.Advantageously, the pressure reference value is determined in at least one pressure reference determination step by calculating an average of the measured pressure over a period of at least 1 s, particularly advantageously at least 3 s, preferably at least 5 s, and most preferably at least 10 s. In particular, the average measured pressure is only determined if the closed state of the at least one interior compartment (by means of the at least one refrigerator door) is detected in the at least one interior compartment state determination step, depending on the measured position parameter of the at least one refrigerator door. It is conceivable that the at least one pressure reference determination step for setting the pressure reference value is performed once after initial commissioning of the refrigerator at the installation site or once a day, for example, every 24 hours.Preferably, the at least one pressure reference determination step is performed at least once per hour, advantageously at least once every 10 minutes, particularly advantageously at least once every 1 minute, and preferably at least once every 30 seconds to update the pressure reference value. Preferably, in at least one pressure threshold determination step of the method, the activation threshold and / or the opening threshold are set as a function of the pressure reference value. It is conceivable that the at least one pressure threshold determination step for setting the activation threshold and / or the opening threshold is performed once after initial commissioning of the refrigeration unit at the installation site or once a day, for example, every 24 hours.Preferably, the at least one pressure threshold determination step is executed at least once per hour, advantageously at least once every 10 minutes, particularly advantageously at least once every 1 minute, and preferably at least once every 30 seconds, in order to update the activation threshold and / or the opening threshold. Preferably, each pressure reference determination step is followed by an execution of the at least one pressure threshold determination step, in particular to determine the activation threshold and / or the opening threshold as a function of the pressure reference value.

[0012] Preferably, in at least one analysis step, a door opening request is detected based on the pressure profile above the opening threshold. A "door opening request" is understood to mean, in particular, a detected state indicating that the at least one door of the refrigeration unit is to be opened by means of the door opening unit. Preferably, the at least one door opening step is initiated based on a door opening request detected in the at least one analysis step, particularly by evaluating the pressure profile above the opening threshold. It is conceivable that the at least one door opening step is initiated with a time delay of preferably a maximum of 5 s, advantageously a maximum of 4 s, particularly advantageously a maximum of 3 s, preferably a maximum of 2 s, and most preferably a maximum of 1 s, after a door opening request has been detected in the at least one analysis step.

[0013] It is further proposed that the activation threshold in at least one pressure threshold determination step, particularly the one mentioned above, be set at least 2 Pa higher than a pressure reference value, particularly the one mentioned above, by means of the at least one evaluation unit and / or the at least one sensor unit. Such a design advantageously minimizes the risk of unnecessarily initiating the analysis step, thereby enabling particularly high energy efficiency and / or user-friendliness. Advantageously, the activation threshold in the at least one pressure threshold determination step is set at least 3 Pa higher, particularly advantageously at least 4 Pa ​​higher, and preferably at least 5 Pa higher than the pressure reference value.Preferably, the activation threshold is set in the at least one pressure threshold determination step to be a maximum of 8 Pa, advantageously a maximum of 10 Pa, greater than the pressure reference value.

[0014] Furthermore, it is proposed that the opening threshold be set at least 2 Pa higher than the activation threshold in at least one pressure threshold determination step, particularly the one mentioned above, especially by means of the at least one evaluation unit. Such a design advantageously minimizes the risk of incorrectly detecting a door opening request, thereby enabling a particularly high level of user comfort. Advantageously, the opening threshold in the at least one pressure threshold determination step is set at least 3 Pa higher, particularly advantageously at least 4 Pa ​​higher, and preferably at least 5 Pa higher than the activation threshold. Preferably, the opening threshold in the at least one pressure threshold determination step is set at most 8 Pa higher, and advantageously at most 10 Pa higher, than the activation threshold.

[0015] Furthermore, it is proposed that in at least one pressure reference determination step, particularly the one mentioned above, a moving average of the detected pressure is calculated, especially by means of the at least one evaluation unit and / or the at least one sensor unit, in order to update the opening threshold and / or the activation threshold as a function of the moving average of the detected pressure during the operation of the refrigeration unit. Such a design allows for the advantageous consideration of the influence of, for example, a temperature change in the interior of the refrigeration unit when evaluating the detected pressure. Furthermore, the risk of an incorrect detection of a door opening request can be advantageously minimized. Preferably, the moving average calculated in the at least one pressure reference determination step is used as the pressure reference value for determining the activation threshold and / or the opening threshold.Preferably, in the at least one pressure reference determination step, the moving average of preferably at least the last five values, advantageously at least the last four values, and preferably at least the last three values ​​of the detected pressure is calculated, particularly by means of the at least one evaluation unit. Preferably, the at least one pressure reference determination step for calculating the moving average of the detected pressure is only executed by the at least one evaluation unit if a closed state of the interior (by means of the refrigerator door) is detected as a function of the detected position parameter of the refrigerator door in the at least one interior state determination step.Preferably, each pressure reference determination step is followed by an execution of at least one pressure threshold determination step, in order to dynamically determine, in particular, the activation threshold and / or the opening threshold as a function of the moving average of the detected pressure.

[0016] It is further proposed that at least one door opening step for opening the at least one door of the refrigeration unit, particularly by means of the at least one evaluation unit, is initiated when at least one pressure value above the opening threshold is detected in the at least one analysis step. Such a design enables advantageously rapid response efficiency, as a user's desire to open the door is recognized particularly quickly. Specifically, a "pressure value above the opening threshold" is understood to mean a pressure value greater than or equal to the opening threshold. Preferably, the at least one door opening step, particularly by means of the at least one evaluation unit, is initiated when at least two, and advantageously at least three, pressure values ​​above the opening threshold are detected in the at least one analysis step.Preferably, at least one door opening step is initiated, in particular by means of at least one evaluation unit, if exactly one pressure value above the opening threshold is detected in the at least one analysis step.

[0017] Furthermore, it is proposed that the at least one door opening step for opening the at least one door of the refrigeration unit, particularly by means of the at least one evaluation unit, is advantageously initiated only if, in particular additionally, a time interval of at least 0.1 s and / or at most 2 s is recorded between the point in time when the opening threshold is exceeded and the point in time when it falls below it. Such a design advantageously minimizes the risk of incorrectly detecting a door opening request, thereby enabling a particularly high level of user comfort.In particular, measurement artifacts or, for example, rapid or slow pressure fluctuations caused by temperature changes inside the refrigeration unit or environmental influences, especially the closing of a door or window near the installation location of the refrigeration unit, can be advantageously taken into account when detecting a door opening request. Preferably, the at least one door opening step for opening the at least one door of the refrigeration unit is initiated when the time interval between the point in time when the opening threshold is exceeded and the point in time when it falls below the threshold is measured. This time interval is at least 0.1 s and at most 2 s, advantageously at most 1.5 s, particularly advantageously at most 1 s, preferably at most 0.8 s, and particularly preferably at most 0.6 s.

[0018] Furthermore, it is proposed that the at least one door opening step for opening the at least one door of the refrigeration unit is initiated, in particular only, if, in the at least one analysis step, a gradient, particularly a significant gradient, between at least two pressure values ​​above the opening threshold of a minimum of 25 Pa / s and / or a maximum of 150 Pa / s is detected. Such a design advantageously minimizes the risk of false-positive pressure readings for detecting a door opening request, for example, caused by excessively slow or rapid pressure changes within the interior. This allows for a significantly higher level of user comfort.Preferably, the at least one door opening step for opening the at least one refrigeration unit door of the refrigeration unit is initiated, in particular only, if in the at least one analysis step a slope, in particular an absolute value, between at least three, advantageously at least four pressure values ​​above the opening threshold of a minimum of 25 Pa / s and / or a maximum of 150 Pa / s is detected.

[0019] It is further proposed that the at least one door opening step for opening the at least one door of the refrigeration unit is initiated, in particular only, if a maximum amplitude of a maximum of 70 Pa, relative to a pressure reference value, is detected in the at least one analysis step. Such a design advantageously minimizes the risk of false-positive pressure readings for detecting a door opening request, for example, caused by measurement artifacts during pressure acquisition or misuse of the refrigeration unit, particularly the application of excessive force to the door. This allows for a significantly higher level of user comfort. Preferably, the pressure reference value is the pressure reference value calculated in the at least one pressure reference determination step, in particular the moving average of the detected pressure.Alternatively, the pressure reference value can be the opening threshold or the activation threshold. A "maximum amplitude" is understood to mean, in particular, a maximum absolute difference between the detected pressure and the pressure reference value. Preferably, the maximum amplitude comprises a value of at most 60 Pa, advantageously at most 55 Pa, and more preferably at most 50 Pa.

[0020] Furthermore, it is proposed that at least one door opening step for opening at least one door of the refrigeration unit, in particular by means of at least one evaluation unit, is initiated when at least two, at least substantially consecutive, exceedances of the opening threshold are detected in the at least one analysis step. Such a design advantageously minimizes the risk of misidentifying a door opening request, since, in particular, the detected pressure for recognizing a door opening request must exhibit a predetermined pattern. This allows for a significantly higher level of user convenience.The phrase "a first temporal event follows a second temporal event at least substantially immediately" is to be understood in particular as meaning that there is a maximum time interval of preferably a maximum of 3 s, advantageously a maximum of 2 s, preferably a maximum of 1 s, and most preferably a maximum of 0.5 s between the first and the second temporal event. Specifically, the detected pressure must fall below the opening threshold at least once between two exceedances of the opening threshold. It is conceivable that the at least one door opening step for opening the at least one door of the refrigeration unit is initiated when exactly three, four, or five at least substantially consecutive exceedances of the opening threshold are detected in the at least one analysis step.Preferably, at least one door opening step is initiated to open at least one door of the refrigeration unit if, in at least one analysis step, exactly two at least substantially consecutive exceedances of the opening threshold are detected.

[0021] Furthermore, it is proposed that the pressure be detected in the at least one detection step at a sampling rate of at least 15 Hz. Such a configuration allows the pressure to be evaluated advantageously and accurately to detect the door opening request, thereby enabling a particularly high level of user comfort. Preferably, the pressure is detected in the at least one detection step at a sampling rate of at least 50 Hz, advantageously at least 100 Hz, particularly advantageously at least 150 Hz, preferably at least 200 Hz, and most preferably at least 240 Hz. Preferably, the pressure is detected in the at least one detection step at a sampling rate of a maximum of 1000 Hz, advantageously at a maximum of 750 Hz, particularly advantageously at a maximum of 500 Hz, and preferably at a maximum of 250 Hz.

[0022] The invention further relates to a refrigeration unit, in particular the one mentioned above, for carrying out the method described above, with at least one inner container which defines the at least one interior space, with at least one refrigeration unit door for closing the at least one interior space, with at least one door opening unit, in particular the one mentioned above, for automatically opening the at least one refrigeration unit door, with at least one control unit for controlling the at least one door opening unit, with at least one evaluation unit for evaluating the detected pressure, and with the sensor unit which has at least one pressure sensor for detecting the pressure of the interior space.

[0023] Advantageously, the refrigeration appliance is designed to cool stored goods, such as foodstuffs, especially beverages, meat, fish, milk and / or dairy products, or pharmaceuticals or vaccines, or chemicals or cosmetic products, or plants, especially flowers or plant seeds, in at least one operating state, particularly to extend the shelf life or maintain the quality of the stored goods. The refrigeration appliance may be a household refrigeration appliance, especially a chest freezer, and advantageously a refrigerator and / or freezer.

[0024] The term "intended" should be understood to mean specifically programmed, designed, and / or equipped. The fact that an object is intended for a specific function should be understood to mean, in particular, that the object fulfills and / or executes this specific function in at least one application and / or operating state.

[0025] Preferably, the refrigeration unit has at least one body. The at least one body of the refrigeration unit preferably forms an outer casing of the refrigeration unit. Preferably, the at least one body and the at least one inner container are formed separately from one another. The at least one inner container is preferably housed within the at least one body. Alternatively, it would be conceivable for the at least one inner container and the at least one body to be formed as a single piece. The at least one inner container preferably has at least one wall, advantageously a plurality of walls. Preferably, the at least one interior space is bounded by the walls of the at least one inner container. The at least one inner container is, for example, made of at least one plastic, at least one metal, or at least one composite material.

[0026] The term "one-piece" is understood to mean, in particular, molded in a single piece. Preferably, this single piece is manufactured from a single blank, a compound, and / or a casting, most preferably using an injection molding process, especially a single- and / or multi-component injection molding process.

[0027] The at least one interior space can be divided into several areas, for example, a receiving area and an evaporator area. Preferably, the receiving area is designed to receive stored goods, such as food, placed into it by an operator. Preferably, the refrigeration unit has at least one refrigerant circuit for cooling the at least one interior space of the refrigeration unit. Preferably, the at least one refrigerant circuit includes an evaporator. Preferably, the evaporator is arranged in the evaporator area. Preferably, the refrigeration unit has at least one partition to spatially separate the receiving area and the evaporator area.

[0028] Preferably, the at least one refrigerator door is designed to counteract, and in particular prevent, the escape of heat, cold, or fluids from the at least one interior space of the refrigerator, or the ingress of dust or foreign matter into the at least one interior space, particularly the receiving area, of the refrigerator. Preferably, the refrigerator has at least one hinge element. In particular, the at least one refrigerator door is connected to the at least one body by means of the at least one hinge element. Preferably, the at least one hinge element defines a mounting axis, in particular a pivot axis, for opening and / or closing the at least one refrigerator door. The at least one refrigerator door and / or the at least one body preferably has / have at least one sealing element, in particular a magnetic one.Preferably, the at least one sealing element of the at least one refrigerator door and / or the at least one body is designed to seal the at least one interior space of the refrigerator, which is closed by the at least one refrigerator door, from a space located outside the refrigerator. Preferably, the at least one sealing element is designed to maintain a leakage rate below a limit value specifically defined for the refrigerator, particularly when the at least one interior space is closed by means of the at least one refrigerator door.

[0029] A "door opening unit" is understood to mean, in particular, a unit for the automatic, at least partial, opening of at least one door of the refrigeration unit. Preferably, the door opening unit forms at least one part, in particular a subassembly, of the refrigeration unit.

[0030] Preferably, the at least one door opening unit comprises at least one drive unit. Preferably, the at least one drive unit is designed as an electric drive unit. Preferably, the at least one drive unit comprises at least one electric motor. Preferably, the at least one drive unit comprises at least one gearbox. Preferably, the at least one door opening unit for opening the at least one refrigerator door comprises at least one plunger that can be driven by the at least one drive unit.

[0031] Preferably, the at least one plunger is rod-shaped. In particular, the length of the at least one plunger is greater than its width and height. Preferably, the at least one plunger has a circular cross-section. Alternatively, it is conceivable that the plunger has a rectangular, oval, or elliptical cross-section. Preferably, the at least one plunger has a straight shape in one of its principal directions of extension. Alternatively, it is conceivable that the at least one plunger has a curvature or bend with respect to its principal direction of extension. For example, the at least one plunger is made of a metal and / or a plastic and / or a glass and / or a composite material.

[0032] The term "principal extension direction" of an object is understood to mean, in particular, a direction that runs parallel to the longest edge of the smallest geometric cuboid that just completely encloses the object.

[0033] Preferably, the at least one door opening unit comprises at least one housing unit. Preferably, the at least one drive unit is arranged at least partially, advantageously at least completely, and preferably completely, within the at least one housing unit of the at least one door opening unit. The term "at least completely" is understood to mean, in particular, at least 55%, advantageously at least 65%, preferably at least 75%, particularly preferably at least 85%, and particularly advantageously at least 95% completely. Preferably, the at least one drive unit is designed to extend and / or retract the at least one plunger, in particular at least partially, from the at least one housing unit.

[0034] The at least one door opening unit is preferably arranged at least partially, and in particular completely, within a space defined by the at least one body and the at least one inner container of the refrigeration unit. Alternatively, it is conceivable that the at least one door opening unit is arranged at least partially on the at least one body, and in particular on the outer casing of the refrigeration unit. Alternatively, it is also conceivable that the door opening unit is arranged at least partially, and in particular completely, within the at least one door of the refrigeration unit, or on the at least one door of the refrigeration unit, and in particular on a side of the door facing the at least one interior of the refrigeration unit.

[0035] The at least one evaluation unit is preferably designed to evaluate the pressure detected by the at least one sensor unit, in particular by the at least one pressure sensor, in order to recognize, in particular, a door opening request depending on the detected pressure. Preferably, the at least one evaluation unit comprises at least one processing unit and, in particular, in addition to the at least one processing unit, at least one storage unit with an evaluation program stored therein for evaluating the detected pressure, in particular according to the method described above. Preferably, the evaluation program is designed to be executed by the at least one processing unit. Preferably, the at least one sensor unit and the at least one evaluation unit are interconnected via a signal connection, in particular to enable data exchange.

[0036] Preferably, the at least one evaluation unit is part of the at least one control unit for controlling the at least one door opening unit. It is conceivable that the at least one evaluation unit constitutes the at least one control unit, at least partially, and in particular completely. A "control unit" is understood to be, in particular, a unit with at least one electronic control device. The at least one control unit can, in principle, also be designed as a control unit. An electronic "control device" is understood to be, in particular, a unit with at least one computing unit, in particular a processor unit, and with at least one storage unit, in particular one of the above-mentioned units, as well as with a control program stored in the storage unit.In principle, the at least one control and / or regulation unit can comprise several interconnected control units, which are preferably designed to communicate with each other via a bus system, a suitable wired data transmission system, or another data transmission system, such as, in particular, a wireless data transmission system. The at least one control unit is preferably designed to control and / or regulate the at least one door opening unit. It is conceivable that the at least one control unit is designed to control and / or regulate several components of the refrigeration unit, for example, controlling a light source in the refrigeration unit or controlling a compressor in the refrigeration unit. Preferably, the at least one control unit comprises a control board on which, in particular, the at least one processing unit and the at least one storage unit are arranged.It is advantageous to have at least one evaluation unit arranged on the control board of at least one control unit.

[0037] The at least one sensor unit is preferably arranged at least partially, advantageously completely, within the at least one interior space. The at least one sensor unit can, in particular, be arranged at least partially, advantageously completely, within the receiving area or the evaporator area.

[0038] Preferably, the at least one pressure sensor of the at least one sensor unit is designed to detect, in particular absolute, air pressure or a measured quantity corresponding to air pressure within the at least one interior space of the refrigeration unit. The at least one pressure sensor is preferably designed as a barometric pressure sensor. More preferably, the pressure sensor is designed as a MEMS-based barometric pressure sensor. Alternatively, however, it would also be conceivable for the at least one pressure sensor to be designed as a piezoresistive pressure sensor, a capacitive pressure sensor, a resonant pressure sensor, an optical pressure sensor, or a ceramic pressure sensor. Preferably, the at least one sensor unit, in particular the at least one pressure sensor, is electrically connected to the at least one evaluation unit in order to transmit the detected pressure to the at least one evaluation unit.Preferably, the at least one pressure sensor includes control electronics. The control electronics of the at least one pressure sensor are specifically designed to compare the detected pressure with the activation threshold. In particular, the control electronics of the at least one pressure sensor are designed to send an activation signal, especially the one mentioned above, to the at least one evaluation unit when the detected pressure exceeds the activation threshold, in order to initiate the analysis step for evaluating the detected pressure. Alternatively, it is conceivable that the refrigeration unit includes a comparator, which is arranged circuit-wise between the at least one pressure sensor and the at least one evaluation unit.Preferably, the comparator is designed to compare the detected pressure with the activation threshold and, depending on whether the activation threshold is exceeded, to send the activation signal to the at least one evaluation unit in order to initiate, in particular, the at least one analysis step for evaluating the detected pressure.

[0039] Preferably, the at least one pressure sensor is arranged within the at least one interior space. Advantageously, the at least one pressure sensor is arranged directly or indirectly on a side of the at least one wall of the at least one interior container facing the interior space. Advantageously, the at least one pressure sensor is arranged on an electronic unit of the refrigeration device. Preferably, the at least one pressure sensor is arranged on the control board of the at least one control unit.

[0040] Preferably, the refrigeration unit has at least one sensor for detecting a position parameter of the at least one refrigeration unit door. The at least one sensor for detecting the position parameter of the at least one refrigeration unit door is preferably designed as a magnetoresistive sensor. Alternatively, it is conceivable that the at least one sensor for detecting the position parameter of the at least one refrigeration unit door is designed as a Hall effect sensor, an infrared sensor, a capacitive proximity sensor, an inductive proximity sensor, a rotary angle sensor, an ultrasonic sensor, or a contact switch. In particular, the at least one sensor for detecting the position parameter of the at least one refrigeration unit is connected to the at least one evaluation unit via a signal transmission system.

[0041] The inventive method for operating the inventive refrigeration device and the inventive refrigeration device itself are not to be limited to the application and embodiment described above. In particular, the inventive method for operating the inventive refrigeration device and the inventive refrigeration device itself may, to achieve a functionality described herein, comprise a different number of individual elements, components, units and / or process steps than the number specified herein.

[0042] Further advantages become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0043] They show: Fig. 1 a schematic representation of a refrigeration device according to the invention, Fig. 2 a schematic sectional view of the refrigeration device according to the invention, Fig. 3 a schematic flow diagram of a method according to the invention for operating the refrigeration device according to the invention, Fig. 4 an exemplary pressure-time diagram of a recorded pressure profile during the process according to the invention, Fig. 5 a schematic flow diagram of an alternative method for operating the refrigeration device according to the invention, and Fig. 6 an exemplary pressure-time diagram of a recorded pressure profile during the alternative method.

[0044] Figure 1 Figure 1 shows a schematic representation of a refrigeration appliance 12a. In this case, the refrigeration appliance 12a is designed as a refrigerator. However, other configurations of the refrigeration appliance 12a would also be conceivable, such as a freezer or a chest freezer.

[0045] The refrigeration unit 12a has at least one housing 44a. The housing 44a forms an outer casing of the refrigeration unit 12a. The refrigeration unit 12a has at least one inner container 36a. The inner container 36a defines at least one interior space 18a of the refrigeration unit 12a. The inner container 36a is enclosed within the housing 44a. The inner container 36a and the housing 44a are separate components. The refrigeration unit 12a has at least one door 26a for closing the interior space 18a. The inner container 36a has multiple walls. The inner container 36a has a rear wall, which is located opposite an opening in the housing 44a that can be closed by the door 26a. Furthermore, the inner container 36a has a bottom wall 46a, a ceiling wall, a side wall 48a and another side wall.The at least one interior space 18a is bounded by the walls of the at least one inner container 36a. The at least one inner container 36a is, in this case, at least partially, and in particular completely, made of at least one plastic. Alternatively, however, it would also be conceivable that the at least one inner container 36a is, at least partially, and in particular completely, made of a metal or a composite material. A thermally insulating material, in particular a thermally insulating foam (not shown), is inserted into a space 50a between the at least one body 44a, in particular the outer housing, and the at least one inner container 36a, in particular the walls of the inner container 36a.

[0046] The refrigeration unit 12a has at least one interior compartment 18a and a receiving area 52a. The receiving area 52a is designed to receive and cool stored goods, such as food, placed into the receiving area 52a by an operator. The refrigeration unit 12a has at least one refrigerant circuit for cooling the interior compartment 18a (not shown).

[0047] The at least one refrigerator door 26a is designed to counteract, and in particular prevent, the escape of heat or cold or fluids from the at least one interior space 18a of the refrigerator 12a or the entry of dust or foreign bodies into the at least one interior space 18a, in particular into the receiving area 52a, of the refrigerator 12a.

[0048] The refrigeration unit 12a has at least one hinge element (not shown). The at least one refrigeration unit door 26a is connected to the at least one body 44a by means of the at least one hinge element. The at least one hinge element defines a mounting axis, in particular a pivot axis, for opening and / or closing the refrigeration unit door 26a.

[0049] The refrigeration unit 12a has at least one magnetic sealing element 54a (see Figure 2The at least one magnetic sealing element 54a is arranged on the at least one refrigerator door 26a. The at least one sealing element 54a is designed to seal the at least one interior space 18a of the refrigerator 12a, which is closed by the at least one refrigerator door 26a, from a space located outside the refrigerator 12a. The at least one magnetic sealing element 54a is designed, in particular, to maintain a leakage rate below a limit value specifically defined for the refrigerator 12a, in order to comply, for example, with the standard ISO 15502 or EN 62552, when the at least one interior space 18a is closed by means of the at least one refrigerator door 26a.

[0050] The refrigeration unit 12a includes at least one door opening unit 38a. The at least one door opening unit 38a has at least one drive unit 56a (see below). Figure 2In the present case, the at least one drive unit 56a is designed as an electric drive unit. The at least one drive unit 56a comprises an electric motor (not shown). The at least one drive unit 56a comprises at least one gearbox (not shown).

[0051] The at least one door opening unit 38a is arranged at least partially within the space 50a between the at least one body 44a of the refrigeration unit 12a and the at least one inner container 36a, in particular the bottom wall 46a of the at least one inner container 36a, of the refrigeration unit 12a (cf. Figure 2Alternatively, it would also be conceivable that the at least one door opening unit 38a is arranged at least partially on the at least one body 44a, in particular the outer casing of the refrigeration unit 12a. Alternatively, it would also be conceivable that the at least one door opening unit 38a is arranged in the space 50a between the at least one body 44a and a side wall of the inner container 36a or a ceiling wall of the inner container 36a. Alternatively, it would also be conceivable that the at least one door opening unit 38a is arranged on or at least partially inside the at least one refrigeration unit door 26a.

[0052] The at least one door opening unit 38a comprises at least one plunger 58a, which can be driven by the at least one drive unit 56a, for opening the at least one refrigerator door 26a. The at least one door opening unit 38a has at least one housing unit (not shown). The at least one plunger 58a is arranged at least partially within the at least one housing unit. It is conceivable that the at least one plunger 58a is arranged completely within the housing unit in a fully retracted state. The at least one drive unit 56a is designed to retract and / or extend the at least one plunger 58a, in particular at least partially, from the at least one housing unit.

[0053] The refrigeration unit 12a includes at least one sensor unit 16a (see Figure 2The at least one sensor unit 16s comprises at least one pressure sensor for detecting the pressure of the at least one interior space 18a of the refrigeration unit 12a (not shown). The at least one pressure sensor is designed as a MEMS-based barometric pressure sensor. The at least one pressure sensor of the at least one sensor unit 16a is intended to detect the absolute air pressure within the interior space 18a of the refrigeration unit 12a. Alternatively, however, it would also be conceivable that the at least one pressure sensor is designed as a piezoresistive pressure sensor, a capacitive pressure sensor, a resonant pressure sensor, an optical pressure sensor, or a ceramic pressure sensor.

[0054] The refrigeration unit 12a includes at least one control unit 40a for controlling at least one door opening unit 38a (see Figure 2It is conceivable that the at least one control unit 40a is additionally intended to control and / or regulate several components of the refrigeration unit 12a, for example, controlling a light source of the refrigeration unit 12a or controlling the at least one refrigerant circuit of the refrigeration unit 12a. The at least one control unit 40a comprises a control board (not shown). The at least one control unit 40a of the refrigeration unit 12a is arranged on a wall facing the at least one interior space 18a, in this case on the side wall 48a, of the at least one inner container 36a of the refrigeration unit 12a. In particular, the refrigeration unit 12a has at least one cover element to visually conceal and / or protect the at least one control unit 40a from a user (not shown).

[0055] The refrigeration unit 12a comprises at least one evaluation unit 22a. The evaluation unit 22a is designed to evaluate the pressure detected by the pressure sensor. The evaluation unit 22a is part of the control unit 40a of the refrigeration unit 12a. The evaluation unit 22a is located on the control board of the control unit 40a. The sensor unit 16a, in particular the pressure sensor, is located on the control board of the control unit 40a. The evaluation unit 22a is designed to evaluate the pressure detected by the pressure sensor in order to recognize, in particular, a door opening request based on the detected pressure.The at least one evaluation unit 22a comprises a processing unit and, in particular, in addition to the processing unit, a storage unit with an evaluation program stored therein for evaluating the measured pressure, which is intended to be executed by the processing unit (not shown). The at least one evaluation unit 22a is, for example, designed as a microcontroller. The at least one sensor unit 16a, in particular the at least one pressure sensor, is electrically connected to the at least one evaluation unit 22a in order to transmit, in particular, the measured pressure to the at least one evaluation unit 22a. The at least one sensor unit 16a, in particular the at least one pressure sensor, is electrically connected to the at least one evaluation unit 22a via the control board of the at least one control unit 40a.

[0056] The at least one pressure sensor of the at least one sensor unit 16a includes control electronics (not shown). The control electronics of the at least one pressure sensor are designed to compare the detected pressure with a predetermined pressure threshold, in particular an activation threshold 28a. The control electronics of the at least one pressure sensor are further designed to send an activation signal to the at least one evaluation unit 22a if the detected pressure exceeds the predetermined pressure threshold, in particular the activation threshold 28a.

[0057] The refrigeration unit 12a has at least one sensor 60a for detecting a position parameter of the at least one refrigeration unit door 26a. The at least one sensor 60a for detecting the position parameter of the at least one refrigeration unit door 26a is designed as a magnetoresistive sensor. Alternatively, it is conceivable that the at least one sensor 60a for detecting the position parameter of the at least one refrigeration unit door 26a is designed as a Hall effect sensor, an infrared sensor, a capacitive proximity sensor, an inductive proximity sensor, a rotary angle sensor, an ultrasonic sensor, or a contact switch. In particular, the at least one sensor 60a for detecting the position parameter of the refrigeration unit door 26a is connected to the at least one evaluation unit 22a via a signal transmission system.

[0058] Figure 3 shows a schematic flowchart of a process 10a for the operation of the refrigeration device 12a designed as a refrigerator.

[0059] Method 10a comprises at least one acquisition step 14a for acquiring the pressure by means of at least one sensor unit 16a, in particular by means of the at least one pressure sensor of the at least one sensor unit 16a, within the at least one interior space 18a of the refrigeration unit 12a. In the at least one acquisition step 14a of method 10a, the pressure is acquired at a sampling rate of 20 Hz. In In at least one detection step 14a, an absolute pressure is detected in at least one interior space 18a of the refrigeration unit 12a.

[0060] The method 10a includes at least one pressure reference determination step 34a, which is performed in particular by the at least one evaluation unit 22a and / or the at least one sensor unit 16a, in particular by the control electronics of the at least one pressure sensor. InIn at least one pressure reference determination step 34a, a moving average of the recorded pressure is calculated to determine and / or update an opening threshold value 30a and / or the activation threshold value 28a as a function of the moving average of the recorded pressure during the operation of the refrigeration unit 12a. In at least one pressure reference determination step 34a, the moving average of the last four recorded pressure values ​​is calculated.

[0061] The moving average calculated in at least one pressure reference determination step 34a is used as the pressure reference value 62a to determine the activation threshold 28a and / or the opening threshold 30a in at least one pressure threshold determination step 32a of the procedure 10a. The at least one pressure threshold determination step 32a is executed, in particular, by the at least one evaluation unit 22a and / or the at least one sensor unit 16a, specifically by the control electronics of the at least one pressure sensor. In this case, each pressure reference determination step 34a is followed by an execution of the pressure threshold determination step 32a, in order to determine, in particular, the activation threshold 28a and / or the opening threshold 30a as a function of the pressure reference value 62a, specifically the moving average of the measured pressure.

[0062] InIn at least one further acquisition step of method 10a, in particular by means of the at least one sensor 60a for acquiring the position parameter of the refrigerator door 26a, which acquires at least one position parameter of the at least one refrigerator door 26a (not shown). In at least one interior state determination step of method 10a, in particular by means of the at least one evaluation unit 22a or control electronics of the at least one sensor 60a, a state open by means of the at least one refrigerator door 26a and / or a state closed by means of the at least one refrigerator door 26a of the at least one interior space 18a is detected as a function of the acquired position parameter of the at least one refrigerator door 26a (not shown).Depending on the detected position parameter of the at least one refrigerator door 26a, an open or closed signal is sent to the at least one evaluation unit 22a and / or the at least one sensor unit 16a in the at least one interior state determination step. In particular, the at least one position parameter of the at least one refrigerator door 26s includes a resistance signal. An open state of the at least one interior 18a by means of the at least one refrigerator door 26a can be detected in the at least one interior state determination step if, for example, the resistance signal detected by the sensor 60a, in particular the magnetoresistive sensor, corresponds to at least 90% of an original resistance value.In particular, in the at least one interior state determination step, a closed state of the at least one interior 18a by means of the at least one refrigerator door 26a can be detected if the resistance signal detected by means of the magnetoresistive sensor is less than 90% of the original resistance value.

[0063] It is conceivable that at least one pressure reference determination step 34a of the procedure 10a for forming the moving average of the detected pressure is only executed if a closed state of at least one interior space 18a, determined by means of at least one refrigerator door 26a, is detected in the at least one interior space state determination step, depending on the detected position parameter of the at least one refrigerator door 26a. In particular, the determined pressure reference value 62a remains at the value of the moving average of the detected pressure last formed in at least one pressure reference determination step 34a in a state of at least one interior space 18a that is open, as detected in the at least one interior space state determination step, by means of at least one refrigerator door 26a.

[0064] The activation threshold 28a is set in at least one pressure threshold determination step 32a at least 2 Pa, in particular 4 Pa, higher than the pressure reference value 62a, in particular the moving average of the recorded pressure formed in at least one pressure reference determination step 34a. In In at least one comparison step 64a of the method 10a, the measured pressure is compared with the activation threshold 28a, in particular by means of the at least one sensor unit 16a, especially the control electronics of the at least one pressure sensor. Depending on whether the measured pressure exceeds the activation threshold 28a as detected in the at least one comparison step 64a, an activation signal is sent to the at least one evaluation unit 22a to initiate at least one analysis step 20a of the method 10a.

[0065] In at least one analysis step 20a of the procedure 10a, the measured pressure is evaluated using at least one evaluation unit 22a. At least one analysis step 20a is initiated when the measured pressure exceeds the activation threshold 28a. In at least one analysis step 20a, a pressure profile above an opening threshold 30a, which differs from the activation threshold 28a, is evaluated. Specifically, the opening threshold 30a is higher than the activation threshold 28a. In at least one analysis step 20a, a door opening request is detected based on the pressure profile above the opening threshold 30a.

[0066] The opening threshold 30a is set higher than the activation threshold 28a in at least one pressure threshold determination step 32a by at least 2 Pa, in particular 4 Pa ​​in this case.

[0067] InDepending on the result of at least one analysis step 20a of the method 10a, in particular depending on a detected door opening request, at least one door opening step 24a of the method 10a is triggered to open at least one refrigerator door 26a of the refrigerator 12a. In at least one door opening step 24a, the refrigerator door 26a is moved from a closed position to an open, in particular not closed, position by means of at least one door opening unit 38a of the refrigerator 12a. In particular, in at least one door opening step 24a, the refrigerator door 26a is opened by means of at least one door opening unit 38a to such an extent that a user can open the refrigerator door 26a further, preferably without a special handle element.It is conceivable that the at least one door opening step 24a is initiated with a time delay of preferably a maximum of 5 s, advantageously a maximum of 4 s, particularly advantageously a maximum of 3 s, preferably a maximum of 2 s, particularly preferably a maximum of 1 s, after a door opening request has been detected in the at least one analysis step 20a.

[0068] The at least one door opening step 38a for opening the refrigerator door 26a of the refrigerator 12a is initiated by means of the at least one evaluation unit 22a if at least one pressure value above the opening threshold value 30a is detected in the at least one analysis step 20a. In this case, the at least one door opening step 24a for opening the refrigerator door 26a of the refrigerator 12a is initiated if, alternatively or additionally, a time interval between a point in time when the opening threshold value 30a is exceeded and a point in time when it falls below the threshold value 30a of a minimum of 0.1 s and a maximum of 1 s is detected.Alternatively or additionally, it is conceivable that at least one door opening step 24a is initiated to open at least one refrigerator door 26a of the refrigerator 12a if, in at least one analysis step 20a, a slope between at least two, in this case three, pressure values ​​above the opening threshold value 30a of a minimum of 25 Pa / s and / or a maximum of 150 Pa / s is detected. Alternatively or additionally, it is conceivable that at least one door opening step 24a is initiated to open at least one refrigerator door 26a of the refrigerator 12a if, in at least one analysis step 20a, a maximum amplitude of 60 Pa relative to the pressure reference value 62a, in particular the moving average, of the detected pressure is detected.

[0069] It is conceivable that the method 10a includes at least one adaptation step (not shown). This at least one adaptation step can be initiated, for example, by a user of the refrigeration unit 12a and / or by the at least one evaluation unit 22a. Preferably, a user can select between a sensitive operating mode and a less sensitive operating mode. Preferably, in the at least one adaptation step, in particular by selecting an operating mode, the sensitivity of initiating the at least one analysis step 20a and / or detecting a door opening request is adjusted. Preferably, the sensitivity relates to the respective conditions that must be met to initiate the at least one analysis step 20a and / or to detect the door opening request in the at least one analysis step 20a.For example, a condition can be the level of a pressure threshold, in particular the activation threshold 28a and / or the opening threshold 30a, or a pressure gradient within a time window, or a maximum pressure amplitude. Additionally, it is conceivable that the at least one evaluation unit 22a automatically initiates the at least one adjustment step, particularly to reduce sensitivity, if, after initiation of the at least one door opening step 24a, preferably at least twice, advantageously at least three times, preferably at least four times, no state of the at least one interior space 18a being opened by means of the at least one refrigerator door 26a is detected depending on the position parameter of the at least one refrigerator door 26a.Alternatively or additionally, it is conceivable that in at least one adjustment step the activation threshold 28a and / or the opening threshold 30a is preferably increased and / or decreased by at least 0.1 Pa, advantageously by at least 0.5 Pa, preferably by at least 1 Pa, with respect to the original value in order to adjust the sensitivity.

[0070] Figure 4 Figure 1 shows a time-pressure diagram describing an exemplary pressure profile 66a during the process 10a. The pressure profile 66a describes the absolute pressure in the interior 18a of the refrigeration unit 12a as a function of time, as measured by at least one sensor unit 16a, in particular at least one pressure sensor, in at least one measurement step 14a. The measured absolute pressure is plotted on an axis 68a against an axis 70a of time.

[0071] The pressure profile 66a starts with a pressure that is at least substantially constant, corresponding to the atmospheric pressure at the installation location of the refrigeration unit 12a. The interior 18a is closed by means of the refrigeration unit door 26a. In at least one pressure reference determination step 34a of the procedure 10a, a moving average of the measured pressure is determined. The moving average of the measured pressure is used as the pressure reference value 62a. In at least one pressure threshold determination step 32a, the activation threshold 28a and the opening threshold 30a are determined as a function of the pressure reference value 62a, in particular as a function of the moving average of the measured pressure. In at least one pressure threshold determination step 32a, the activation threshold 28a is set 4 Pa ​​higher than the pressure reference value 62a.In at least one pressure threshold determination step 32a, the opening threshold 30a is set 4 Pa ​​higher than the activation threshold 28a.

[0072] InDuring a period of time 42a, a user exerts a pressure force on at least one refrigerator door 26a, for example, by briefly pushing against it. This pressure force causes a change in pressure within at least one interior space 18a of the refrigerator 12a. Specifically, the pressure force compresses at least one sealing element 54a of the refrigerator 12a, reducing the volume of the interior space 18a and causing a pressure increase. When the user releases the pressure force, the sealing element 54a expands again, increasing the volume of the interior space 18a and causing a pressure drop.The at least one sealing element 54a is preferably designed to be elastic, whereby in particular a damped vibration can arise from alternating compression and expansion of the at least one sealing element 54a.

[0073] In at least one comparison step 64a, the at least one sensor unit 16a detects that the activation threshold 28a has been exceeded. An activation signal is sent to the at least one evaluation unit 22a to initiate the at least one analysis step 20a. In the at least one analysis step 20a, the pressure profile above the opening threshold 30 is evaluated by the at least one evaluation unit 22a.

[0074] For period 42a, at least one analysis step 20a detects that at least one pressure value exceeds the opening threshold. Additionally, at least one analysis step 20a detects that the time interval between exceeding and falling below the opening threshold 30a is greater than 0.1 s and less than 1 s. This results in at least one analysis step 20a detecting a door opening request, which in turn triggers at least one evaluation unit 22a to open at least one door opening step 24a of the refrigerator door 26a.

[0075] In the Figure 5 and 6 Another embodiment of the invention is shown. The following description is essentially limited to the differences between the embodiments, whereby with regard to identical components, features and functions, reference is made to the description of the embodiment of the Figures 1 to 4Reference can be made to. To distinguish the embodiments, the letter a in the reference numerals of the embodiment is used in the Figures 1 to 4 by the letter b in the reference numerals of the embodiment of the Figures 5 and 6 replaced. With regard to identically designated components, especially those with the same reference numerals, reference can generally also be made to the drawings and / or the description of the embodiment of the Figures 1 to 4 be referred.

[0076] In Figure 5A schematic flowchart of a method 10b for operating a refrigeration unit is shown. In at least one detection step 14b of the method 10b, a pressure in at least one interior space of the refrigeration unit is detected by means of at least one sensor unit of the refrigeration unit, wherein in at least one analysis step 20b the detected pressure is evaluated by means of at least one evaluation unit of the refrigeration unit. In at least one comparison step 64b of the method 10b, the detected pressure is compared with an activation threshold value 28b, in particular by means of the at least one sensor unit. Depending on whether the detected pressure exceeds the activation threshold value 28b as detected in the at least one comparison step 64b, an activation signal to initiate the at least one analysis step 20b of the method 10b is sent to the at least one evaluation unit.In at least one analysis step 20b, a pressure profile above an opening threshold value 30b, which differs from the activation threshold value 28b, is evaluated. Depending on a result of at least one analysis step 20b, in particular a detected door opening request, at least one door opening step 24b is triggered to open at least one door of the refrigeration unit. The at least one door opening step 24b, for opening at least one door of the refrigeration unit, is initiated if at least two, essentially consecutive, exceedances of the opening threshold value 30b are detected in at least one analysis step 20b, in particular within a maximum time span of 1 second.

[0077] Figure 6Figure 10b shows a time-pressure diagram describing an exemplary pressure profile 66b during procedure 10b. The pressure profile 66b describes the absolute pressure in the interior of the refrigeration unit, as measured by at least one sensor unit in at least one measurement step 14b, as a function of time. The measured absolute pressure is plotted on an axis 68b against an axis 70b of time.

[0078] The pressure profile 66b starts with a pressure that is at least substantially constant and corresponds at least substantially to the atmospheric pressure at the installation location of the refrigeration unit. The at least one interior space is closed by means of the at least one refrigeration unit door. In at least one pressure reference determination step 34b of procedure 10b, a moving average of the measured pressure is determined. The moving average of the measured pressure is used as the pressure reference value 62b. In the at least one pressure threshold determination step 32b of procedure 10b, the activation threshold value 28b and the opening threshold value 30b are determined as a function of the pressure reference value 62b, in particular as a function of the moving average of the measured pressure. In the at least one pressure threshold determination step 32b, the activation threshold value 28b is set 4 Pa ​​higher than the pressure reference value 62b.In at least one pressure threshold determination step 32b, the opening threshold 30b is set 4 Pa ​​higher than the activation threshold 28b.

[0079] During a period 42b, a user exerts a pressure force on the at least one refrigerator door, in particular by briefly pressing against the at least one refrigerator door twice. This double pressing against the refrigerator door creates a sequence of compression followed by expansion, followed by further compression, followed by further expansion of a sealing element of the refrigerator. This leads, in particular, to a pressure increase followed by a pressure drop, followed by a further pressure increase, followed by a further pressure drop.

[0080] In at least one comparison step 64b, the activation threshold 28b is detected by means of at least one sensor unit. An activation signal is sent to the at least one evaluation unit to initiate at least one analysis step 20b. In at least one analysis step 20b, the pressure profile above the opening threshold 30b is evaluated by means of at least one evaluation unit.

[0081] For period 42b, at least one analysis step 20b detects at least two essentially consecutive exceedances of the opening threshold value 30b, particularly within a maximum time span of 1 second. This results in a door opening request being detected in at least one analysis step 20b, which triggers at least one evaluation unit 22b to initiate at least one door opening step 24b for opening at least one refrigerator door.

[0082] For further features of procedure 10b, refer to the Figures 1 to 4 and their descriptions are referenced. Reference sign

[0083] 10 Procedure 12 Refrigeration unit 14 Detection step 16 Sensor unit 18 Interior 20 Analysis step 22 Evaluation unit 24 Door opening step 26 Refrigeration unit door 28 Activation threshold 30 Opening threshold 32 Pressure threshold determination step 34 Pressure reference determination step 36 Inner container 38 Door opening unit 40 Control unit 42 Time period 44 Body 46 Bottom wall 48 Side wall 50 Intermediate space 52 Recording area 54 Sealing element 56 Drive unit 58 Plunger 60 Sensor 62 Pressure reference value 64 Comparison step 66 Pressure profile 68 Axis 70 Axis

Claims

1. Method (10a; 10b) for operating a refrigeration appliance (12a), wherein in at least one detection step (14a; 14b) a pressure in at least one interior space (18a) of the refrigeration appliance (12a) is detected by means of a sensor unit (16a) of the refrigeration appliance (12a), wherein in at least one analysis step (20a; 20b) the detected pressure is evaluated by means of at least one evaluation unit (22a) of the refrigeration appliance (12a), and wherein, depending on a result of the at least one analysis step (20a, 20b), at least one door opening step (24a) is triggered to open at least one refrigeration appliance door (26a) of the refrigeration appliance (12a), characterized by the fact that at least one analysis step (20a; 20b) is initiated when the recorded pressure exceeds an activation threshold (28a, 28b), wherein in the at least one analysis step (20a; 20b) a pressure profile above an opening threshold (30a; 30b) different from the activation threshold (28a, 28b) is evaluated.

2. Method (10a; 10b) according to claim 1, characterized by the fact that the activation threshold (28a; 28b) is set at least 2 Pa higher than a pressure reference value (62a; 62b) in at least one pressure threshold determination step (32a; 32b).

3. Method (10a; 10b) according to claim 1 or 2, characterized by the fact that the opening threshold (30a; 30b) is set at least 2 Pa higher than the activation threshold (28a; 28b) in at least one pressure threshold determination step (32a; 32b).

4. Method (10a; 10b) according to one of the preceding claims, characterized by the fact that in at least one pressure reference determination step (34a; 34b) a moving average of the detected pressure is formed to update the opening threshold (30a; 30b) and / or the activation threshold (28a; 28b) depending on the moving average of the detected pressure during the operation of the refrigeration unit (12a; 12b).

5. Method (10a; 10b) according to any one of the preceding claims, characterized by the fact that at least one door opening step (24a; 24b) to open the at least one refrigeration appliance door (26a) of the refrigeration appliance (12a) is initiated if at least one pressure value above the opening threshold value (30a; 30b) is detected in the at least one analysis step (20a).

6. Method (10a; 10b) according to one of the preceding claims, characterized by the fact that at least one door opening step (24a; 24b) to open the at least one refrigerator door (26a) of the refrigerator (12a) is initiated when, in the at least one analysis step (20a), a time interval between a time of exceeding and a time of falling below the opening threshold (30a; 30b) of a minimum of 0.1 s and / or a maximum of 2 s is recorded.

7. Method (10a; 10b) according to one of the preceding claims, characterized by the fact thatat least one door opening step (24a; 24b) to open the at least one refrigeration appliance door (26a) of the refrigeration appliance (12a) is initiated if in the at least one analysis step (20a) a slope between at least two pressure values ​​above the opening threshold value (30a; 30b) of a minimum of 25 Pa / s and / or a maximum of 150 Pa / s is detected.

8. Method (10a; 10b) according to any one of the preceding claims, characterized by the fact that at least one door opening step (24a; 24b) to open the at least one refrigeration appliance door (26a) of the refrigeration appliance (12a) is initiated when, in the at least one analysis step (20a), a maximum amplitude, in particular relative to a pressure reference value (62a; 62b), of the detected pressure of a maximum of 70 Pa is detected.

9. Method (10a; 10b) according to any one of the preceding claims, characterized by the fact thatat least one door opening step (24a; 24b) to open the at least one refrigerator door (26a) of the refrigerator (12a) is initiated if at least two at least substantially consecutive exceedances of the opening threshold value (30a; 30b) are detected in the at least one analysis step (20b).

10. Method (10a; 10b) according to any one of the preceding claims, characterized by the fact that the pressure in which at least one detection step (14a; 14b) is detected with a sampling rate of at least 15 Hz.

11. Refrigeration unit (12a) for carrying out the method (10a) according to one of the preceding claims, comprising at least one inner container (36a) which delimits the at least one interior space (18a), comprising at least one refrigeration unit door (26a) for closing the at least one interior space (18a), comprising at least one door opening unit (38a) for automatically opening the at least one refrigeration unit door (26a), comprising at least one control unit (40a) for controlling the at least one door opening unit (38a), comprising at least one evaluation unit (22a) for evaluating the detected pressure, and comprising at least one sensor unit (16a) which has at least one pressure sensor for detecting the pressure of the interior space (18a).

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