CN1833147A - Refrigeration device and operating method for the same - Google Patents
Refrigeration device and operating method for the same Download PDFInfo
- Publication number
- CN1833147A CN1833147A CNA2004800093161A CN200480009316A CN1833147A CN 1833147 A CN1833147 A CN 1833147A CN A2004800093161 A CNA2004800093161 A CN A2004800093161A CN 200480009316 A CN200480009316 A CN 200480009316A CN 1833147 A CN1833147 A CN 1833147A
- Authority
- CN
- China
- Prior art keywords
- evaporimeter
- chiller
- temperature
- temperature sensors
- difference
- 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.)
- Pending
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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
- F25D21/02—Detecting the presence of frost or condensate
-
- 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
- F25B2700/11—Sensor to detect if defrost is necessary
-
- 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
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21173—Temperatures of an evaporator of the fluid cooled by the evaporator at the outlet
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- 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
- F25D21/006—Defroster control with electronic control circuits
-
- 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
- F25D2700/10—Sensors measuring the temperature of the evaporator
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)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to a refrigeration device with a thermally-insulating housing (1), enclosing an inner chamber (2) and an evaporator (7), arranged in the housing (1), on the surface of which a layer of ice (13) can form during operation, whereby two temperature sensors (12, 14) are placed in the vicinity of the evaporator (7) such that, for a given thickness of the ice layer (13), only one of the temperature sensors (12) is embedded in the ice layer (13). A monitoring circuit (10), connected to the two temperature sensors (12, 14), is embodied to decide, using a difference between the recorded temperatures from the temperature sensors (12, 14), whether a defrosting of the evaporator (7) is necessary or not and to give an output signal displaying the result of the decision. A defrosting process can be automatically introduced using said output signal.
Description
The present invention relates to have the heat insulation shell and a chiller that is arranged on the evaporimeter in the housing in space in the encirclement.Moisture in condensation goes out on this evaporimeter in this chiller course of work in the space, this moisture has formed ice sheet in the continuity of time, and this ice sheet makes evaporimeter and interior space to be cooled form heat to isolate.This efficient of isolating chiller produces harmful effect, so, in order to keep working economically of chiller, ice sheet is melted.
For a user, the defrosting that identification is best is difficult constantly.Each defrost process with heat is brought in the chiller relevant, this heat must be discharged from during routine work again and also the energy total losses of device produced harmful effect thus when chiller.Therefore frequent defrosting is the same uneconomic with seldom defrosting.
Therefore desirablely provide a kind of chiller, it allows whether need automatically to determine a defrost process by the estimation to ice thickness degree on the evaporimeter.
What this was meeted the requirements is that the ice layer thickness that can directly measure on the evaporimeter reaches by this thickness whether need automatically to determine defrosting.But other parts that the cost height of the sensor of ice layer thickness and life-span are shorter than traditional chiller significantly on the direct measurement of the permission evaporimeter, its use in chiller has increased the liability of its repairing significantly thus.
In most of current frostless chillers, used time-controlled Defrost method for this reason, promptly always started a defrost process by a control circuit of chiller at interval regular time.Though this technology reliably and cheap, its shortcoming is, can not accomplish adaptive for the residing different weather conditions of chiller work.In other words, may be oversize when the average time interval of " suitably " between two defrost process is worked under thermal environment for device, in this environment along with opening of door will have a large amount of moistures to enter into space in it and the very fast growth of ice sheet on the evaporimeter thus at every turn, on the contrary when chiller is operated in the cold environment, because moisture seldom enters, use the time interval longer can improve the economic performance of chiller than the time interval of setting.In addition, this technology is not considered a situation, promptly moisture enter not only running time with device, and relevant with the type of number of times that opens the door and the chilled goods in device, placed.
Task of the present invention is, provides a kind of chiller, and it allows to judge the ice amount of gathering reliably with simple and firm means on evaporimeter, and provides the method for work that is used for this chiller.
This task will be by having claim 1 the chiller of feature and the method for work with feature of claim 6 solve.
Utilization of the present invention is by variation in temperature distribution in the evaporimeter surrounding environment that existence produced of ice sheet.If there is not ice on the evaporimeter, then obtain evaporimeter not interrupted to a great extent heat flow on every side, thermograde is relatively smooth, and very little by the difference between the temperature of two sensors detections.If but heat flow is hindered by ice sheet, and then in ice sheet, obtaining steep relatively thermograde, the difference between this temperature that causes being detected by two sensors has big difference with two sensors comparing under no ice condition condition.
Especially, on these temperature sensors surface that can directly be installed in evaporimeter and another temperature sensor be installed in a distance arranged from this surface.Can guarantee that thus first sensor responds to the variations in temperature of evaporimeter soon at least when evaporimeter is begun to supply with refrigerant again behind quiescent phase.
But also can consider, respectively be installed in two temperature sensors different but from evaporator surface be not for zero distance last.This layout is not too sensitive for the response of the ice layer thickness that is not enough to bury a temperature sensor; But in a single day when reaching the boundary of the ice layer thickness between the two sensors, detectable temperature difference is very responsive for the response of the continuation increase of ice layer thickness between them.
In the present invention can be applicable to have and is set directly in the space or form on the chiller of evaporimeter of thermo-contact with interior space.
On this chiller, or not suitable to the evaporimeter automatic defrosting, heat together in the space and to the cold storage article of placing wherein because will spread in the chiller by the heat of its output by a heater of packing into.But can use the output signal that is provided by observation circuit in this chiller, with indicator of its control, the latter sends the signal of essential defrosting to the user.
An advantageous applications of the present invention is frostless chiller, promptly such chiller, wherein evaporimeter be installed in one with passage that interior space is communicated with in and in this passage, can be heated in order to defrost, and unnecessary also make in the space heat together.
In this chiller preferably on these temperature sensors surface that is installed in evaporimeter and another temperature sensor be installed in of passage lead in the export department in the space.
Can obtain of the present invention further feature and advantage with reference to accompanying drawing to the explanation of embodiment by following.Accompanying drawing is:
Fig. 1: the chiller of first configuration perspective cross-sectional slice according to the present invention;
Fig. 2: in the configuration of Fig. 1, the relation of the thickness of ice sheet on temperature difference that detects by sensor and the evaporimeter;
Fig. 3: according to the details synoptic diagram of second configuration of chiller of the present invention; And
Fig. 4: according to the ice layer thickness of second configuration and the relation between the temperature difference.
Fig. 1 extremely summarily represents the frostless chiller of first configuration according to the present invention.This chiller comprises a heat insulation housing 1 in a conventional manner, in this housing, constituted an interior space 2 that is used for receiving cold storage article and one by a dividing plate 3 with should in the evaporator room 5 that is communicated with interior space 2 of 2 some apertures 4 that separate, that pass through dividing plate 3, space.In evaporator room 5, have a tabular evaporimeter 7, and have a Defrost heater 8 that closely contacts with this evaporimeter by refrigeration machine 6 supply refrigerant.
Evaporator room 5 and aperture 4 jointly are also referred to as air duct.
A control circuit 10 is controlled refrigeration machine 6 and a job that is installed in the ventilator 11 on the aperture 4 by the measuring-signal of (unshowned) temperature sensor in interior space 2.Refrigeration machine 6 and ventilator 11 can always side by side be worked; Preferably, ventilator 11 relative refrigeration machines 6 always are switched on and turn-off with certain time-delay, at first give evaporimeter 7 one opportunitys when devoting oneself to work, promptly before air circulation, be cooled, and still make full use of the surplus cold of evaporimeter 7 so that close to have no progeny at refrigeration machine 6 with convenient refrigeration machine 6.
One first temperature sensor 12 is directly fixed on the surface of evaporimeter 7, this temperature sensor by when ventilator 11 work by the air stream of air duct circulation inswept and ice sheet 13 of formation in moisture in the condensation clearancen air-flow and the continuity thereon thus in the time, this ice sheet is illustrated with sparse hacures face.
One second temperature sensor 14 is installed in the aperture 4, in cooled air is flow back into by this aperture in evaporator room 5 in the space 2.
For the temperature in the space 2 in making remains in the given range, evaporimeter 7 compartment of terrain work is in a conventional manner promptly supplied with liquid refrigerant by refrigeration machine 6 compartment of terrains.Control circuit 10 detects poor by between the temperature of sensor 12 and 14 measurements, this detection is always in the devoted oneself to work time delay of a prediction or by these temperature sensors 12 of flash-pot, the variation of temperature speed of a detection of 14 was lower than on moment of a boundary value carries out, this time engrave therefore and can suppose: the Temperature Distribution in the air duct and a static distribution no longer differ too big.This time engrave, the difference between the temperature that is detected by temperature sensor 12,14 increases along with the increase of ice layer thickness when ice layer thickness is minimum when being zero.This is shown in the curve among Fig. 2, and this curve table shows the function of temperature difference Δ T as ice layer thickness d.When this temperature difference Δ T surpassed a boundary value Δ Tmax, then supposition: ice sheet 13 had surpassed a critical thickness dmax, so that need make evaporimeter 7 defrostings.When the case, control circuit 10 waits for, when interior space 2 is cooled to refrigeration machine 6 and ventilator 11 again and can be turned off till, and a switch 9 is connected, by it to Defrost heater 8 power supplies.
Predetermined regularly the reaching of time interval quilt during switch 9 remains closed selected under the situation of the power of considering Defrost heater 8 like this, and promptly the heat of exporting in this time interval must sufficiently make ice sheet 13 melt.
Fig. 3 represents the general diagrammatic sketch of details of an amplification of the chiller of second configuration according to the present invention.The difference of the configuration of it and Fig. 1 only is the installation of temperature sensor 12 ', 14 ', therefore needn't illustrate again and describe on the whole at it for chiller.Here two temperature sensors 12 ', 14 ' are fixed on the bearing part 15 of being done by the material of poor thermal conductivity, and this bearing part is fixed on, for example is bonded on the surface of evaporimeter 7, can form ice sheet 13 on this surface.
Fig. 4 is illustrated in temperature difference Δ T between the sensor that detects under the condition identical in the configuration with Fig. 1 as the function of ice layer thickness d.As long as the thickness of this ice sheet less than temperature sensor 12 ' from the surface of evaporimeter 7 apart from d1, these two temperature sensors will be in the air stream in the evaporator room 5, and their temperature is determined by the temperature of this air stream basically.Because second temperature sensor 14 ' arrives the distance of evaporimeter 7 greater than the distance of first sensor 12 ' to this evaporimeter, therefore second sensor may be more a little than first sensor slight heat.In case but ice sheet 13 beginning hyperplasia surpass sensor 12 ', this ice sheet will influence the temperature balance between the sensor, and the temperature of sensor 12 ' is than being determined by the temperature of evaporimeter 7 more strongly in the past that this can find out from the inflection point on the thickness d 1 in the curve of Fig. 4.Therefore temperature difference Δ T begins along with ice layer thickness d increases soon now.Can obtain different value Δ Tmax ' in the configuration with Fig. 1 with the corresponding temperature difference of critical ice layer thickness dmax.Because around dmax, the curve of Fig. 4 can be realized big slope, therefore can accomplish the accurate and reproducible detection to critical ice layer thickness dmax.
Claims (9)
1. heat insulation shell (1) and a chiller that is arranged on the evaporimeter (7) in the housing (1) of having space (2) in the encirclement, on the surface of this evaporimeter, form ice sheet (13) at work, it is characterized in that: two temperature sensors (12 are set around evaporimeter (7) like this, 14), promptly when given thickness of ice sheet (13), in these temperature sensors only one (12) be embedded in the ice sheet (13); And be provided with one with these two temperature sensors (12,14) observation circuit of Lian Jieing (10), decide by the difference between the temperature value that is detected by these temperature sensors (12,14): whether evaporimeter (7) needs to defrost and exports an output signal of indicating this determination result.
2. according to the chiller of claim 1, it is characterized in that: in these temperature sensors (12) one directly is installed on the surface of evaporimeter (7) and another temperature sensor (14) is installed in a distance is arranged from this surface.
3. according to the chiller of claim 1 or 2, it is characterized in that: evaporimeter (7) be installed in one with passage (4,5) that interior space (2) are communicated with in.
4. according to the chiller of claim 2 or 3, it is characterized in that: another temperature sensor (14) is installed in the export department (4) of leading in the interior space of passage (4,5).
5. according to one chiller in the above claim, it is characterized in that: be provided with a heater (8), be used for heating fumigators by described output signal control.
6. be used for method of work, have following steps according to the chiller of above claim one:
A) detect by the difference (Δ T) between these temperature sensors (12,14) temperature value measured, and
B) when this difference (Δ T) surpasses a boundary value (Δ Tmax), decision needs a defrost process.
7. according to the method for claim 6, it is characterized in that: step a) and b) be performed to a preset time delay after always devoting oneself to work with evaporimeter (7).
8. according to the method for claim 6, it is characterized in that: when the temperature changing speed in these two sensors (12,14) at least one is lower than a boundary value, execution in step a) and b).
9. according to one method in the claim 5 to 8, it is characterized in that: when having determined defrost process of needs, evaporimeter (7) is heated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10315524.4 | 2003-04-04 | ||
| DE10315524A DE10315524A1 (en) | 2003-04-04 | 2003-04-04 | Refrigeration device and operating method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1833147A true CN1833147A (en) | 2006-09-13 |
Family
ID=32981064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800093161A Pending CN1833147A (en) | 2003-04-04 | 2004-04-05 | Refrigeration device and operating method for the same |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20060242973A1 (en) |
| EP (1) | EP1613906A1 (en) |
| CN (1) | CN1833147A (en) |
| BR (1) | BRPI0409186A (en) |
| DE (1) | DE10315524A1 (en) |
| RU (1) | RU2349847C2 (en) |
| WO (1) | WO2004088222A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654775A (en) * | 2018-12-18 | 2019-04-19 | 青岛经济技术开发区海尔热水器有限公司 | Defrosting control method and air source heat pump system |
| CN109850419A (en) * | 2018-12-25 | 2019-06-07 | 广州好高冷科技有限公司 | It is a kind of based on mixing cold multi-cycle variable air rate cold-accumulating insulated case ventilation device |
| CN110873447A (en) * | 2019-11-29 | 2020-03-10 | 深圳麦克维尔空调有限公司 | Defrosting control method, device and equipment of refrigeration air conditioner |
| CN110873504A (en) * | 2018-08-31 | 2020-03-10 | 沈阳海尔电冰箱有限公司 | Defrosting control method of refrigerator and refrigerator |
| CN110887315A (en) * | 2019-12-03 | 2020-03-17 | 珠海格力电器股份有限公司 | Refrigerator defrosting detection device, refrigerator defrosting control method and refrigerator |
| CN111322812A (en) * | 2018-12-17 | 2020-06-23 | 青岛海尔生物医疗股份有限公司 | Control method and control device for intelligently defrosting air-cooled refrigerator and refrigerator |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007066360A1 (en) * | 2005-12-06 | 2007-06-14 | Giuseppe Floris | Device for detecting the characteristics of ice-snow-hoar frost |
| US20080148733A1 (en) * | 2006-12-22 | 2008-06-26 | Genedics Llc | System and method for creating a closed-loop riparian geothermal infrastructure |
| GB2456744A (en) * | 2007-08-30 | 2009-07-29 | Ebac Ltd | Auto-defrost refrigeration apparatus |
| JP4676520B2 (en) * | 2008-08-28 | 2011-04-27 | シャープ株式会社 | Integrated air conditioner |
| KR102292004B1 (en) * | 2017-04-11 | 2021-08-23 | 엘지전자 주식회사 | Refrigerator |
| CN107940873B (en) * | 2017-11-17 | 2020-12-04 | 合肥美的电冰箱有限公司 | Defrosting method, defrosting system, computer readable storage medium and refrigeration equipment |
| US11493260B1 (en) | 2018-05-31 | 2022-11-08 | Thermo Fisher Scientific (Asheville) Llc | Freezers and operating methods using adaptive defrost |
| IT201900005938A1 (en) * | 2019-04-17 | 2020-10-17 | Ali Group S R L | PROCEDURE FOR CHECKING THE EVAPORATOR ICE IN A TEMPERATURE BLAST CHILLER |
| DE102023200198A1 (en) | 2023-01-12 | 2024-07-18 | BSH Hausgeräte GmbH | Determining a defrosting time of an evaporator of a household refrigeration appliance |
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| DE3128758A1 (en) * | 1981-07-21 | 1983-02-10 | Krönert Elektro GmbH & Co KG, 5880 Lüdenscheid | Method of controlling the automatic defrosting of the evaporator plate in refrigerators |
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| JPH1194437A (en) * | 1997-09-19 | 1999-04-09 | Ishizuka Electronics Corp | Frosting detector |
| JP2000180022A (en) * | 1998-12-16 | 2000-06-30 | Sanden Corp | Frost detecting device for cooler |
| AU7699000A (en) * | 1999-09-24 | 2001-04-24 | Arcelik A.S. | Defrost control |
| JP2001133124A (en) * | 1999-11-05 | 2001-05-18 | Sanden Corp | Frost detector for cooler |
| US6260365B1 (en) * | 2000-01-07 | 2001-07-17 | Traulsen & Company, Inc. | Control system and related methods for refrigeration and freezer units |
| JP2001215077A (en) * | 2000-02-02 | 2001-08-10 | Hitachi Ltd | Defrost controller, method for controlling and refrigerator |
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| JP2002090035A (en) * | 2000-09-11 | 2002-03-27 | Daiwa Industries Ltd | Frost detecting mechanism in refrigerator |
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-
2003
- 2003-04-04 DE DE10315524A patent/DE10315524A1/en not_active Withdrawn
-
2004
- 2004-04-05 CN CNA2004800093161A patent/CN1833147A/en active Pending
- 2004-04-05 RU RU2005130293/11A patent/RU2349847C2/en not_active IP Right Cessation
- 2004-04-05 WO PCT/EP2004/003609 patent/WO2004088222A1/en active Application Filing
- 2004-04-05 BR BRPI0409186-8A patent/BRPI0409186A/en not_active IP Right Cessation
- 2004-04-05 EP EP04725699A patent/EP1613906A1/en not_active Withdrawn
- 2004-04-05 US US10/551,561 patent/US20060242973A1/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873504A (en) * | 2018-08-31 | 2020-03-10 | 沈阳海尔电冰箱有限公司 | Defrosting control method of refrigerator and refrigerator |
| CN110873504B (en) * | 2018-08-31 | 2021-04-23 | 沈阳海尔电冰箱有限公司 | Defrosting control method of refrigerator and refrigerator |
| CN111322812A (en) * | 2018-12-17 | 2020-06-23 | 青岛海尔生物医疗股份有限公司 | Control method and control device for intelligently defrosting air-cooled refrigerator and refrigerator |
| CN109654775A (en) * | 2018-12-18 | 2019-04-19 | 青岛经济技术开发区海尔热水器有限公司 | Defrosting control method and air source heat pump system |
| CN109850419A (en) * | 2018-12-25 | 2019-06-07 | 广州好高冷科技有限公司 | It is a kind of based on mixing cold multi-cycle variable air rate cold-accumulating insulated case ventilation device |
| CN109850419B (en) * | 2018-12-25 | 2024-03-29 | 广州好高冷科技有限公司 | Multi-cycle variable air volume cold accumulation insulation box ventilation device based on mixed cooling |
| CN110873447A (en) * | 2019-11-29 | 2020-03-10 | 深圳麦克维尔空调有限公司 | Defrosting control method, device and equipment of refrigeration air conditioner |
| CN110887315A (en) * | 2019-12-03 | 2020-03-17 | 珠海格力电器股份有限公司 | Refrigerator defrosting detection device, refrigerator defrosting control method and refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0409186A (en) | 2006-05-30 |
| WO2004088222A1 (en) | 2004-10-14 |
| DE10315524A1 (en) | 2004-10-14 |
| RU2005130293A (en) | 2006-06-10 |
| US20060242973A1 (en) | 2006-11-02 |
| RU2349847C2 (en) | 2009-03-20 |
| EP1613906A1 (en) | 2006-01-11 |
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