EP0810411A2 - Automatic system for the intelligent start-up of the defrosting phases in refrigerator systems - Google Patents
Automatic system for the intelligent start-up of the defrosting phases in refrigerator systems Download PDFInfo
- Publication number
- EP0810411A2 EP0810411A2 EP97830245A EP97830245A EP0810411A2 EP 0810411 A2 EP0810411 A2 EP 0810411A2 EP 97830245 A EP97830245 A EP 97830245A EP 97830245 A EP97830245 A EP 97830245A EP 0810411 A2 EP0810411 A2 EP 0810411A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- instantaneous
- microprocessor
- defrosting
- automatic system
- 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- Withdrawn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
- 238000010257 thawing Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
- 230000009849 deactivation Effects 0.000 claims 1
- 238000012795 verification Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003797 telogen phase 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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
Definitions
- This patent application concerns an automatic system for the intelligent start-up of the defrosting phases in refrigerator systems.
- the quantity of ice and the speed with which it forms may vary according to different factors, the most important of which are the relative humidity of the ambient air, the evaporation of the product in the refrigerating compartment as well as the frequency with which the door of the compartment is opened and closed.
- thermostatic probe which instantaneously reads the air temperature at the outlet of the evaporator; it serves in fact to activate the compressor when the temperature in the compartment reaches a certain preset threshold and, alternatively to stop the compressor when the temperature has once again dropped below a second preset threshold.
- defrosting is planned in advance in the sense that the refrigerator manufacturer or even the user, according to his or her personal experience decides in advance that defrosting should be carried out at intervals of so many hours or so many days.
- the scope of this invention is to resolve this problem of the current technology used in refrigerator systems.
- the system according to the invention in fact makes it possible to start the defrosting process automatically and instantaneously when - thanks to the thermostatic probe normally installed on all refrigerators - there is a reduction in the cooling speed of the air which strikes the evaporator fins beyond a preset value considered as acceptable, and which indicates a reduced thermal exchange of the fins as a result of the formation of an ice layer of a certain consistency on the fins.
- the system according to the invention is based on the verification of the efficiency of the evaporator, it may be stated that this efficiency is evaluated with respect to the major or minor speed with which the air from the evaporator is cooled.
- the evaluation of the cooling speed of the air is performed by means of two components: the thermostatic probe which reads the temperature of the air from the evaporator and a microprocessor which elaborates the data transmitted by the above probe.
- This microprocessor can instantaneously determine the speed at which the temperature of the air from the evaporator decreases, on the basis of the data transmitted by the probe. The microprocessor then compares the instantaneous value of the air cooling speed with a preset speed value, under which the microprocessor transmits a signal to activate the defrosting operation.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT96AN000019A IT1286984B1 (it) | 1996-05-31 | 1996-05-31 | Sistema automatico per l'avvio ponderato delle fasi di sbrinamento degli impianti frigoriferi |
| ITAN960019 | 1996-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0810411A2 true EP0810411A2 (en) | 1997-12-03 |
Family
ID=11333981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97830245A Withdrawn EP0810411A2 (en) | 1996-05-31 | 1997-05-26 | Automatic system for the intelligent start-up of the defrosting phases in refrigerator systems |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0810411A2 (enrdf_load_stackoverflow) |
| KR (1) | KR970075779A (enrdf_load_stackoverflow) |
| AR (1) | AR008382A1 (enrdf_load_stackoverflow) |
| IT (1) | IT1286984B1 (enrdf_load_stackoverflow) |
| TR (1) | TR199700449A3 (enrdf_load_stackoverflow) |
| TW (1) | TW357249B (enrdf_load_stackoverflow) |
-
1996
- 1996-05-31 IT IT96AN000019A patent/IT1286984B1/it active IP Right Grant
-
1997
- 1997-05-22 TW TW086106860A patent/TW357249B/zh active
- 1997-05-26 KR KR1019970020597A patent/KR970075779A/ko not_active Withdrawn
- 1997-05-26 EP EP97830245A patent/EP0810411A2/en not_active Withdrawn
- 1997-05-30 AR ARP970102354A patent/AR008382A1/es unknown
- 1997-05-30 TR TR97/00449A patent/TR199700449A3/tr unknown
Non-Patent Citations (1)
| Title |
|---|
| None |
Also Published As
| Publication number | Publication date |
|---|---|
| AR008382A1 (es) | 2000-01-19 |
| IT1286984B1 (it) | 1998-07-24 |
| KR970075779A (ko) | 1997-12-10 |
| TW357249B (en) | 1999-05-01 |
| ITAN960019A0 (enrdf_load_stackoverflow) | 1996-05-31 |
| ITAN960019A1 (it) | 1997-12-01 |
| TR199700449A2 (xx) | 1997-12-21 |
| TR199700449A3 (tr) | 1997-12-21 |
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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 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: LT PAYMENT 970611;LV PAYMENT 970611;SI PAYMENT 970611 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19990609 |