• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a refrigerator, an interior lighting (6) is provided. This comprises a niche (10) in which an LED strip is arranged on a printed circuit board (20). The printed circuit board (20) also carries a temperature sensor (28) in addition to a number of LEDs. The circuit board (20) is snapped into a transparent cover (11) which covers the niche (10). The arrangement of the temperature sensor (28) on the same circuit board (20) as the LEDs simplifies the construction of the device and its mounting.
    公开号:CH713404A2
    申请号:CH00619/18
    申请日:2018-05-17
    公开日:2018-07-31
    发明作者:Wagner Klaus；Bachmann Adrian
    申请人:V Zug Ag；
    IPC主号:
    专利说明:

    description
    FIELD OF THE INVENTION The invention relates to a food refrigerating appliance having a working space, cooling means for cooling the working space, interior lighting comprising at least one light source for illuminating the working space and at least one sensor for measuring a condition parameter of the work space.
    Background [0002] In food refrigerators, e.g. Refrigerators and / or freezers, usually an interior lighting is provided, which illuminates the useful space when opening the device.
    In addition, such devices have one or more sensors for measuring the state of the useful space. In particular, this is a temperature sensor with which the temperature in the working space is monitored and / or regulated.
    DESCRIPTION OF THE INVENTION It is an object to provide a device of this type with a simple structure.
    This object is achieved by the device according to claim 1. Accordingly, the invention relates to a cooling device for food or other refrigerated goods, which has the following components: A work space: This space serves to accommodate food to be cooled. - Coolants for cooling the working space: This is usually a heat pump, through the evaporator heat is extracted from the useful space. Conceivably, e.g. Also semiconductor heat pumps (Peltier elements), magnetocaloric heat pumps, etc. - An interior lighting: This serves to illuminate the work space and includes at least one light source. - A sensor for measuring a state parameter of the work space: This is in direct or indirect thermal contact with the work space.
    Claim is further provided a circuit board on which both the light source and the sensor are arranged. By this common installation on a circuit board of the device structure is simplified. In particular, light source and sensor can be mounted in a common step in the device.
    The sensor is advantageously a temperature sensor. However, it is conceivable that the sensor could be e.g. is also a humidity sensor, a light sensor, a gas sensor or an air pressure sensor, or a sensor that can measure multiple state parameters (e.g., humidity and temperature) simultaneously.
    Under a "circuit board" is also a so-called "flexprint" to understand, i. a flexible film with tracks, e.g. can be glued on a support.
    In particular, a plurality of light sources can be arranged together with the sensor on the circuit board, whereby the structure in terms of improved illumination is further simplified.
    Further, the device may have a plurality of sensors. In this case, a plurality of printed circuit boards can be provided, wherein at least one of these printed circuit boards, optionally on each of these printed circuit boards, at least one sensor is arranged, and / or it can be arranged on a printed circuit board, a plurality of sensors.
    In an advantageous embodiment, the device may have at least one niche in or on the work space, i. an at least partial depression. It is also conceivable that the niche is arranged in a raised part of the useful space wall. The circuit board is at least partially, preferably completely, arranged in the niche.
    The niche can e.g. be arranged in a wall, the ceiling, the floor and / or the appliance door. It may also be located in a utility component located in the utility room, e.g. an intermediate floor, to be arranged.
    Over the niche, an at least partially transparent lid can be arranged, via which the light from the light source enters the work space. In this case, the printed circuit board is advantageously fastened to the cover, since the heat transfer can thus be improved and / or the arrangement can be better assembled or disassembled.
    Advantageously, the lid is designed so that it touches the housing of the sensor so as to improve the heat transfer from the working space to the sensor.
    Preferably, the at least one light source is an LED. LEDs generate little heat so that they hardly resp. if, then only for a limited period, influence.
    To supply the light source (s) with power, the circuit board usually has two power supply terminals. These connections can be used to apply a voltage that lights up the light source (s). Advantageously, the sensor is also connected to the power supply terminals of the light source (s), and the controller of the refrigerator is configured to interrogate the sensor via the power supply terminals. This eliminates the need for separate connections for the sensor and the structure of the device and its installation are easier.
    When using LED (s) as light sources, the controller for activating the light source at the power supply terminals create a first voltage at which a voltage across the LED or the LEDs is above their forward voltage. In contrast, to interrogate the sensor, the controller applies a second voltage at which the voltage across the LED (s) is below the forward voltage so that the resistance between the power supply terminals is primarily characterized by the sensor.
    BRIEF DESCRIPTION OF THE DRAWINGS Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to the figures. Showing:
    1 a cooling device with open door or doors,
    2 shows one of the interior lighting of the refrigerator according to Fig. 1,
    3, the interior lighting of Fig. 2 with the cover removed,
    4 shows a section through the interior lighting,
    5 shows a section through the cover with the printed circuit board of the interior lighting,
    6 is a first view of the cover with the printed circuit board,
    7 is a second view of the cover with the printed circuit board,
    8 is a view of the printed circuit board,
    9 is a sectional view of a second embodiment of an interior lighting,
    10 shows an embodiment of the circuit arrangement of the components on the printed circuit board,
    11 is a view of a refrigerator obliquely from below, with no door, the interior lighting of the freezer compartment is visible,
    Fig. 12, the interior lighting of Fig. 11 in a view in which the cover is not shown.
    Ways to carry out the invention
    First embodiment: [0019] FIG. 1 shows a refrigerator with a housing 1, the useful space of which is formed by a freezer compartment 2 and a cooling compartment 3. In the present embodiment, two separate doors 4, 5 are provided for freezing and refrigerating compartment 2, 3.
    The device has in a conventional manner coolant for cooling the work space, in particular a heat pump.
    In the freezer compartment 2 as well as in the cooling compartment 3, at least one interior lighting 6 is provided in each case, which e.g. illuminated when opening the respective compartment the corresponding part of the useful space.
    In Fig. 2, only the interior lighting 6 of the cooling compartment 3 can be seen. This is preferably located on a side wall 7. There may also be two interior lights 6, e.g. be arranged on the opposite side walls.
    Fig. 2 and 3 show the interior lighting 6 in an enlarged view. It comprises a recessed niche 10, which is covered by a transparent cover 11. In Fig. 3, the cover 11 is not shown.
    The structure of the components of the interior lighting results from Fig. 4 to 8.
    Fig. 4 shows the niche 10, which is designed as a recess in a side wall plate 12. In this niche 10, the cover 11 is snapped.
    The structure of the cover 11 can be seen from Fig. 5-7. He has a transparent front panel 14, which separates the niche from the work space 2, 3. On the front panel 14 resilient fingers 16 are arranged, which can be snapped into recesses in the niche 10 to secure the cover 11 above the niche.
    Next 11 retaining clips 18 are provided on the cover, which hold a circuit board 20, which is shown individually in Fig. 8.
    Advantageously, the circuit board 20 is snapped into the retaining clips 18 and thus on the cover 11.
    The printed circuit board 20 is designed essentially as a so-called "LED strip" and carries a plurality of LEDs. It is held by the retaining clips 18 so that the light of the LEDs is incident in the work space 2, 3, preferably directed at an oblique angle to the center of the work space 2, 3.
    At least one end 24 of the printed circuit board 20 is formed as a plug, which can be connected to a counterpart 26 in the niche 10 (see Fig .. 3).
    On the circuit board 20, a temperature sensor 28 is further arranged (with a variant 28 »). With this temperature sensor 28, the temperature of the working space 2 and 3 can be measured.
    In an advantageous embodiment, the temperature sensor 28 can be arranged in the middle between two adjacent LEDs 22, so that the distance to these is as large as possible and their waste heat affects the signal of the temperature sensor 28 as little as possible.
    In order to improve the exchange of air between the niche 10 and the work space 2, 3, at least one ventilation opening 30 may be arranged in the cover 11 and / or in the intermediate space between the cover 11 and the niche 10 (see FIG. ,
    Second Embodiment: In order to reduce the temperature difference between the work space 2, 3 and the temperature sensor 28, a direct thermal bridge between the work space 2, 3 and the temperature sensor 28 may be provided. This is shown schematically in the embodiment of FIG. 9. In this, somewhat more schematically than the first embodiment shown variant printed circuit board 20 is in turn secured by resilient retaining clips 18 on the cover 11. Here, however, a projection 32 is formed on the cover, which projects into the niche 10 and touches the temperature sensor 28.
    As a result, a better matching of the temperature of the temperature sensor 28 to that of the work space 2, 3 is achieved.
    As an additional or alternative measure to obtain a better matching of the temperature of the temperature sensor 28 to that of the work space 2, 3, can on the side of the niche 10, which is the work space 2, 3, a vacuum insulation panel 34th to be ordered. By matching is meant, in particular, that the temperature influence from the outside takes place only in a subordinate frame and the sensor primarily detects the air temperature in the interior.
    Circuit Construction: Fig. 10 shows a possible circuit arrangement of the components of the interior lighting, wherein the circuit board 20 schematically and dashed encloses those components which are arranged on it.
    As can be seen, the circuit board 20 has two power supply terminals 36 to power the LEDs.
    The temperature sensor 28 is exemplified as an NTC resistor.
    It is arranged in parallel with the LEDs 22 between the power supply terminals 36, in the sense that the power from the power supply terminals 36 is split among the LEDs 22 and the temperature sensor 28.
    In the present embodiment, a plurality of LED arrays 40a, 40b are provided, each comprising at least one LED 22 and a series resistor 42 in series.
    The refrigerator further has a controller 38 which can apply different voltages across the power supply terminals 36.
    If the LEDs are to be excited to glow, so a first voltage U1 is applied, which is so high that the voltage across each LED 22 each exceeds its forward voltage. In this case, most of the current flows through the LEDs.
    When the temperature sensor 28 is to be interrogated, a lower second voltage U2 <Ul is applied at which the voltage across the LEDs 22 is below the forward voltage. The second voltage U2 can be between 0 and the first voltage or have a sign opposite to the first voltage. In both cases, no current flows through the LEDs and the impedance between the power supply terminals 36 is determined primarily by the temperature sensor 28.
    In any event, when a resistive temperature sensor 28 is employed, the second voltage is nonzero.
    With the second voltage can be measured by the controller 38, the temperature sensor 28 and its signal can be queried.
    In a longer operation with the voltage Ul, the current through the temperature sensor 28 can heat this slightly. Therefore, the controller is advantageously designed to wait for a certain time after operation with the voltage Ul, in particular at least 1 minute before it can measure the temperature at the temperature.
    权利要求:
    Claims (17)
    [1]
    sensor 28 performs. It may also be advantageous to characterize the temperature profile by means of extrapolation predictively faster. Third Embodiment: In Figs. 11 and 12, a third embodiment of the interior lighting 6 is shown, which differs from that according to Figs. 1-3 in their arrangement. This embodiment is exemplified on the ceiling of the work space, here the freezer compartment 2, arranged. Again, a niche 10 with a transparent cover 11 is arranged for this purpose. The cover 11 carries the circuit board 20, which is designed as an "LED strip" and carries LEDs 22, as well as the temperature sensor 28. Remarks: As already mentioned, the sensor is advantageously a temperature sensor. Additionally or alternatively, however, the sensor may also measure another state parameter of the workspace. So he can e.g. a humidity sensor, a light sensor, a gas sensor and / or a pressure sensor. The usable space is configured in the embodiment of FIG. 2 and 3 as a refrigerating compartment, in which a temperature greater than 0 ° C and less than 10 ° C can be maintained. The usable space may be e.g. but also to act a freezer (in which a temperature is maintained below 0 ° C, in particular -25 ° C to -15 ° C), as in the embodiment of FIGS. 11 and 12. It may also be a compartment with a Temperature in the range of 10 ° C to 20 ° C act. The cooling device can be configured with an active air circulation (with a fan), or it can be a passive cooling device without active air circulation. In the above-mentioned embodiment, LEDs 22 are used as light sources. However, it is also conceivable to use other light sources, e.g. from incandescent or fluorescent light sources. The interior lighting 6 can, as mentioned, be arranged on one or both side walls and / or on the rear wall and / or on the floor and / or on the ceiling and / or on the door. In this way, a plurality of sensors can also be arranged on the useful space 2, 3 of the device, in particular a plurality of sensors for the same parameter (for example a plurality of temperature sensors) or sensors for different parameters. In this case, in one variant, at most one sensor may be arranged on each printed circuit board 20, i. In this case, a plurality of circuit boards 20 are provided, e.g. at different points of the working space, over which the useful space 2, 3 can be measured and also illuminated. In another variant, it is also possible to provide a plurality of sensors per printed circuit board 20. So it can be e.g. Make sense to arrange on a printed circuit board 20 a plurality of temperature sensors, e.g. to detect or monitor a temperature gradient in the work space. For example, depending on the temperature gradient, a fan can be controlled to circulate air in the working space 2, 3. The technique presented here may e.g. can be used in a refrigerator, freezer, wine cabinet or a combined food refrigeration appliance. The arrangement of the temperature sensor 28 on the same circuit board 20 as the LEDs or light sources 22, the structure of the device and its installation are simplified. The sensor is advantageously an SMD or THT, which can be automatically populated on the circuit board. The sensor or the sensors can also be controlled via an I 2 C interface, or in principle via any suitable bus system. The printed circuit board can also be glued to the cover. This applies in particular (but not only) when the printed circuit board is designed as a flexprint. Particularly suitable is the technology for household refrigerators. While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims. claims
    1. Cooling device for food with a work space (2, 3), cooling means for cooling the work space (2, 3), an interior light (6) comprising at least one light source (22) for illuminating the work space (2, 3) and at least one sensor (28) for measuring at least one state parameter of the useful space (2, 3), characterized by a printed circuit board (20) on which both the light source (22) and the sensor (28) are arranged.
    [2]
    2. Cooling device according to claim 1, wherein the sensor (28) is a temperature sensor.
    [3]
    3. Refrigerator according to one of the preceding claims, wherein the sensor (28) is a humidity sensor, a light sensor, a gas sensor and / or a pressure sensor.
    [4]
    4. Refrigerator according to one of the preceding claims, wherein on the circuit board (20) a plurality of light sources (22) are arranged together with the sensor (28).
    [5]
    5. Cooling device according to claim 4, wherein the sensor (28) is arranged in the middle between two adjacent light sources (22).
    [6]
    6. Refrigerator according to one of the preceding claims having a plurality of sensors (28), wherein the cooling device has a plurality of printed circuit boards (20) and wherein at least one of the printed circuit boards (20) or on each printed circuit board (20) at least one sensor (28) is arranged and / or wherein on the circuit board (20) more than one sensor (28) is arranged.
    [7]
    7. Refrigerator according to one of the preceding claims having at least one niche (10) in or on the work space (2, 3), wherein the printed circuit board (20) at least partially in the niche (10) is arranged.
    [8]
    8. The refrigerator according to claim 7, wherein over the niche (10) an at least partially transparent cover (11) is arranged, and in particular wherein the circuit board (20) on the cover (11) is fixed.
    [9]
    9. Refrigerator according to claim 8, wherein the circuit board (20) on the cover (11) is snapped.
    [10]
    10. Refrigerator according to one of claims 8 or 9, wherein the cover (11) contacts a housing of the sensor (28).
    [11]
    11. The refrigerator according to claim 10, wherein the cover (11) has a projection (32) which projects into the niche (10) and touches the sensor (28).
    [12]
    12. A refrigerator according to any one of claims 7 to 11, wherein in the cover (11) or in a region between the cover (11) and the niche (10) at least one ventilation opening (30) is arranged, for allowing an air exchange between the niche (10) and the work space (2,3).
    [13]
    13. Refrigerator according to one of claims 7 to 12, wherein on a the Nutzraum (2, 3) opposite side of the niche (10), a vacuum insulation panel (34) is arranged.
    [14]
    14. Cooling device according to one of the preceding claims, wherein the at least one light source (22) is an LED.
    [15]
    15. Refrigerator according to one of the preceding claims, wherein the circuit board (20) has two power supply terminals (36) via which the at least one light source (22) can be supplied with power, wherein the sensor (28) to the power supply terminals (36) is connected and a controller of the refrigerator is configured to interrogate the sensor (28) via the power supply terminals (36).
    [16]
    16. The refrigerator of claim 14, wherein the controller is configured to apply a first voltage to the power supply terminals to activate the light source, wherein a voltage across the LED is above a forward voltage of the LED , and for interrogating the sensor (28) to apply a second voltage at which the voltage across the LED is below the forward voltage.
    [17]
    17. The refrigerator according to claim 16, wherein the at least one LED and the sensor (28) are arranged in parallel between the power supply terminals (36).
    类似技术:
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    同族专利:
    公开号 | 公开日
    CH713404B1|2021-11-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00619/18A|CH713404B1|2018-05-17|2018-05-17|Cooling device with interior lighting and at least one sensor.|CH00619/18A| CH713404B1|2018-05-17|2018-05-17|Cooling device with interior lighting and at least one sensor.|
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