EP1428091A1 - Kältegerät - Google Patents
KältegerätInfo
- Publication number
- EP1428091A1 EP1428091A1 EP02772239A EP02772239A EP1428091A1 EP 1428091 A1 EP1428091 A1 EP 1428091A1 EP 02772239 A EP02772239 A EP 02772239A EP 02772239 A EP02772239 A EP 02772239A EP 1428091 A1 EP1428091 A1 EP 1428091A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control unit
- refrigerating appliance
- functionality
- appliance according
- refrigerant circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000007257 malfunction Effects 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims 1
- 239000002826 coolant Substances 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 9
- 230000002950 deficient Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/08—Refrigerator tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/36—Visual displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23018—Enter parameters by combinations of keys and duration of actuation of keys
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2638—Airconditioning
Definitions
- Refrigeration devices in particular for commercial applications, can be constructed from a large number of electrical or electromechanical functional components which work together in a complex manner, so that when a malfunction of the device is observed, it is often not readily possible to assess which of the various components are causing the problem observed disorder is.
- a high level of training of the customer service personnel is required, which is complex and expensive to maintain.
- knowledge and experience that customer service personnel have gained from previous models cannot easily be transferred to the new models, because the experience of customer service personnel about the most important malfunctions that occur is usually incorporated into the development of new models, so that precisely these malfunctions no longer occur there or at most to a lesser extent.
- the object of the invention is to provide a refrigeration device which, in the event of a malfunction, allows the possible causes of the malfunction to be narrowed down without requiring a visit to a customer service representative on site or before such a visit is carried out.
- the object is achieved by a refrigeration device with the features of claim 1. Since modern refrigeration devices often have a microprocessor as a control unit anyway, it is possible to add a test mode without a noticeable increase in production costs, in particular in the form of a subroutine for such a microprocessor to implement the operating mode for normal cooling operation in which the control unit is able to carry out tests of the functionality of at least some of the components of the refrigerator.
- a basic component for any testing of the functionality of a refrigeration device is at least one temperature sensor, which must be provided for regulating the internal temperature of the refrigeration device.
- the control unit is preferably set up to detect a fault in such a temperature sensor, in particular as a result of a short circuit or break in one of its supply lines.
- the temperature sensor Only if the functionality of the temperature sensor has not shown any signs of a malfunction, it makes sense to perform the functionality of other components, such as the refrigerant circuit, to assess which the indoor temperature must be measured.
- control unit expediently issues a command to operate the refrigerant circuit and compares a temperature change detected during the validity of the command with a target value. If this change in temperature is less than the setpoint, it can be concluded that there is a fault in the refrigerant circuit and that individual components of the refrigerant circuit can be checked.
- a display device such as a seven-segment display for displaying the interior temperature.
- a display device can preferably also be controlled by the control unit in order to display the results of functional tests.
- a user of the refrigerator can read the results and e.g. Pass it on to a customer service representative who can use this information to assess the possible causes of the fault and which measures and, if necessary, spare parts are required to remedy the fault.
- the operation of the refrigerator in the test mode can lead to fluctuations in the interior temperature, it is desirable to ensure that it is not activated accidentally. This can be ensured, for example, by advises that a plurality of buttons for setting operating parameters, the test mode can only be set by pressing a combination of these buttons.
- Fig. 1 is a perspective view of a refrigerator according to the invention
- FIG. 2 shows a schematic block diagram of the refrigeration device
- Fig. 3 is a flowchart of a process of the control unit of the refrigerator in the test mode.
- the housing 1 of the refrigerator has a hollow cover 3 in front of it, in the interior of which electronic circuits for controlling the operation of the refrigerator are accommodated.
- a control panel 4 At the front of the panel 3 there is a control panel 4 with a plurality of buttons 5 for setting operating parameters such as the target temperatures of a refrigerator compartment and a freezer compartment in the interior of the housing 1, etc.
- the buttons 5 are arranged on both sides of an LED display 6, for example displays the temperature of a compartment selected by the user by pressing a button 5.
- FIG. 2 schematically shows some functional components of the refrigeration device, including a temperature sensor 8 arranged in the freezer compartment 7, a temperature sensor 10 arranged in the cooling compartment 9, and a temperature sensor 12 arranged in contact with an evaporator 11 of the cooling compartment 9.
- the temperature sensors 8, 10, 12 are connected to a converter circuit 13, which supplies the measured temperature values supplied by the sensors to a control unit 14 in digitized form.
- the converter circuit 13 and the control unit 14 can belong to the circuits accommodated in the hollow diaphragm 3.
- control unit 14 uses the measured temperatures to control the operation of a compressor 15, which supplies the evaporator 11 and an evaporator 16 of the freezer compartment with refrigerant, receives commands by a user via the buttons 5 and controls the LED display 6 to display an operating parameter specified by a user.
- control unit 14 has a test mode that can be activated by a user by simultaneously or successively pressing a plurality of the keys 5.
- the keys 5 to be operated in combination are located on both sides of the LED display 6 in order to minimize the probability of inadvertent pressing.
- the control unit comprises a program memory (not shown) in which program steps to be carried out for a series of test operations and the order in which they are to be carried out are stored. As long as the test steps do not indicate a malfunction, they will be processed in order. If a test operation gives an indication of a malfunction, this can result in test steps that have to be carried out at a later point in the usual program sequence becoming obsolete because components required to carry them out are defective. In such a case, alternative test steps can be saved or the test operations cancels.
- a first operation S1 is to test the temperature sensors 10, 12, 14.
- the temperature sensors are thermocouples, the temperature-dependent output voltage of which is converted into a digital temperature value by the converter circuit 13 in normal operation.
- the control unit switches the converter circuit 13 into an operating mode in which it detects the resistance of the temperature sensors. If this is beyond a lower or upper limit value, a short circuit or an interruption of a supply line to the temperature sensor is concluded, and a corresponding error code is stored by the control unit in step S2. If one of the temperature sensors is defective, test steps that require the functionality of this sensor can no longer be carried out.
- the control unit records the temperature of the evaporator 11 in step S3 and issues a command to operate the compressor 15 in step S4. If this has been in operation continuously for a predetermined period of time, for example 10 minutes, this should lead to a reduction in the temperature of the evaporator 11 by, for example, at least 4 ° C. After the 10 minutes have elapsed, the control unit calculates the difference between the recorded and the currently reached evaporator temperature in step S5 and compares this with the limit value of 4 ° C.
- control unit stores the corresponding error code in step S6, checks in step S7 whether there are further test operations that can be carried out under these circumstances, and branches there if necessary.
- step S8 the control unit controls the LED display 6 to display stored error codes alternating cyclically.
- a user can read these error codes in sequence and contact a customer service, e.g. Communicate by phone, so that it is possible to narrow down the possible causes of the fault before a site visit and the fault is more likely to be remedied by a single visit by a customer service representative.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10143240A DE10143240A1 (de) | 2001-09-04 | 2001-09-04 | Kältegerät |
| DE10143240 | 2001-09-04 | ||
| PCT/EP2002/009697 WO2003021369A1 (de) | 2001-09-04 | 2002-08-30 | Kältegerät |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1428091A1 true EP1428091A1 (de) | 2004-06-16 |
Family
ID=7697619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02772239A Withdrawn EP1428091A1 (de) | 2001-09-04 | 2002-08-30 | Kältegerät |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US20040261430A1 (de) |
| EP (1) | EP1428091A1 (de) |
| CN (1) | CN1266558C (de) |
| DE (1) | DE10143240A1 (de) |
| WO (1) | WO2003021369A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005083338A1 (ja) * | 2004-03-01 | 2005-09-09 | Yasutaka Nakata | 冷蔵庫、冷凍庫、貯蔵用コンテナおよび冷凍倉庫 |
| CN105157340B (zh) * | 2013-09-24 | 2017-05-17 | 合肥美菱股份有限公司 | 一种冰箱不制冷故障的检测装置 |
| US20150375932A1 (en) * | 2014-06-25 | 2015-12-31 | David King ANDERSON, III | Temperature Controlled Container For Storing And Transporting Core Samples |
| FI20145807A7 (fi) * | 2014-09-16 | 2016-03-17 | Bitzer Kuehlmaschinenbau Gmbh | Ohjausyksikkö kuljetusvälineen kylmälaitteelle |
| CN105066577A (zh) * | 2015-08-21 | 2015-11-18 | 合肥华凌股份有限公司 | 故障检测方法、控制器及冰箱 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4381549A (en) * | 1980-10-14 | 1983-04-26 | Trane Cac, Inc. | Automatic fault diagnostic apparatus for a heat pump air conditioning system |
| JPS61123996A (ja) * | 1984-10-12 | 1986-06-11 | 本田技研工業株式会社 | 故障診断機能を有する車載電子制御装置 |
| JP2824297B2 (ja) * | 1989-12-01 | 1998-11-11 | 株式会社日立製作所 | 空気調和機のセンサ異常時の運転方式 |
| US5684463A (en) * | 1994-05-23 | 1997-11-04 | Diercks; Richard Lee Roi | Electronic refrigeration and air conditioner monitor and alarm |
| JPH09178306A (ja) * | 1995-12-22 | 1997-07-11 | Denso Corp | 冷凍サイクル装置 |
| US5934088A (en) * | 1997-09-02 | 1999-08-10 | Hoshizaki Denki Kabushiki Kaisha | Error monitoring apparatus in refrigerator |
| TW468770U (en) * | 1997-09-18 | 2001-12-11 | Matsushita Refrigeration | Automatic diagnostic device of refrigerating apparatus |
| KR100243053B1 (ko) * | 1997-10-15 | 2000-03-02 | 윤종용 | 냉장고 자기점검장치 |
-
2001
- 2001-09-04 DE DE10143240A patent/DE10143240A1/de not_active Withdrawn
-
2002
- 2002-08-30 CN CNB028173341A patent/CN1266558C/zh not_active Expired - Fee Related
- 2002-08-30 WO PCT/EP2002/009697 patent/WO2003021369A1/de not_active Ceased
- 2002-08-30 EP EP02772239A patent/EP1428091A1/de not_active Withdrawn
-
2004
- 2004-02-27 US US10/788,569 patent/US20040261430A1/en not_active Abandoned
-
2011
- 2011-05-20 US US13/111,987 patent/US20110219796A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03021369A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20040261430A1 (en) | 2004-12-30 |
| US20110219796A1 (en) | 2011-09-15 |
| DE10143240A1 (de) | 2003-03-20 |
| WO2003021369A1 (de) | 2003-03-13 |
| CN1266558C (zh) | 2006-07-26 |
| CN1552009A (zh) | 2004-12-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20040405 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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| 17Q | First examination report despatched |
Effective date: 20050817 |
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| APBK | Appeal reference recorded |
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| APBT | Appeal procedure closed |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18W | Application withdrawn |
Effective date: 20121221 |