EP4004456A1 - A refrigeration cabinet system and a control method thereof - Google Patents
A refrigeration cabinet system and a control method thereofInfo
- Publication number
- EP4004456A1 EP4004456A1 EP20754499.0A EP20754499A EP4004456A1 EP 4004456 A1 EP4004456 A1 EP 4004456A1 EP 20754499 A EP20754499 A EP 20754499A EP 4004456 A1 EP4004456 A1 EP 4004456A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- inverter compressor
- outdoor unit
- range
- indoor unit
- 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.)
- Granted
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 20
- 230000008020 evaporation Effects 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims description 13
- 235000013305 food Nutrition 0.000 description 5
- 238000010257 thawing Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 238000009920 food preservation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004321 preservation Methods 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
-
- 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
- F25D21/04—Preventing the formation 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/22—Refrigeration systems for supermarkets
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
-
- 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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- 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
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems
Definitions
- the present disclosure relates to the field of refrigeration cabinets, and more specifically, the present disclosure relates to an improved refrigeration cabinet system and an improved method for controlling a refrigeration cabinet system.
- Refrigeration cabinets are often used in various large supermarket, convenience stores or bakeries to preserve foods such as dairy products, beverages or bread.
- the refrigerators can be divided into a refrigerated display cabinet with remote condensing units (hereinafter referred to as a split cabinet) and a commercial refrigerator with self-contained condensing units (hereinafter referred to as an integrated cabinet).
- the integrated cabinet includes a compressor, a condenser and an evaporator that are integrated together, and the split cabinet includes an outdoor unit and one or more indoor units, wherein the compressor and the condenser are disposed in the outdoor unit, and the evaporator is disposed in each of the indoor units.
- the operation of the refrigerator may cause the evaporators to frost, and the refrigeration system has a defrost mode to melt the frost condensed in the evaporators.
- the object of the present disclosure is to solve or at least alleviate the problems in the related art.
- a refrigeration cabinets system which includes:
- one or more indoor units each of which includes: an indoor unit inlet, an indoor unit outlet, an expansion valve between the indoor unit inlet and the indoor unit outlet, an evaporator downstream of the expansion valve, and a display cabinet cooled by the evaporator;
- an outdoor unit which includes: an outdoor unit inlet, an outdoor unit outlet, an inverter compressor between the outdoor unit inlet and the outdoor unit outlet, a condenser downstream of the inverter compressor, a controller for controlling an operating frequency of the inverter compressor, and a pressure sensor on a suction side of the inverter compressor;
- each indoor unit outlet is connected to the outdoor unit inlet through pipelines;
- controller is connected to the pressure sensor to obtain pressure information on the suction side of the inverter compressor, and the controller changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a certain range, thereby maintaining a saturated evaporation temperature of each indoor unit to be within a range of -1.5°C to +1.5 °C.
- the controller changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a range of PI to P2, wherein R1+DR corresponds to the pressure of saturated refrigerant at a temperature of - 1.5°C, and R2+DR corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and wherein DR is a pressure correction value.
- the pressure correction value DR is determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet.
- the refrigeration cabinets system includes a plurality of indoor units, and length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet range from -20% to +20%.
- the evaporator of at least one of the indoor units is located above or below the display cabinet, and a fin density of the evaporator is in a range of 6-14 FPI, and/or the evaporator of at least one of the indoor units is located behind the display cabinet, and a fin density of the evaporator is in a range of 3-8 FPI.
- the indoor units do not have a defrost mode.
- a method for controlling a refrigeration cabinets system which can be used in the refrigeration cabinets system according to the embodiments, wherein the method includes:
- the method includes:
- R1+DR corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C
- R2+DR corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C
- DR is a pressure correction value
- the pressure correction value DR is determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet.
- the method includes: controlling length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet to be within a range from -20% to +20%;
- the method includes: disposing the evaporators below or above the display cabinet and setting a fin density of the evaporators in a range of 6-14 FPI, and/or disposing the evaporators behind the display cabinet and setting a fin density of the evaporators in a range of 3-8 FPI.
- FIG. 1 shows a schematic view of a refrigeration cabinets system according to an embodiment of the present disclosure
- FIG. 2 shows a schematic structural view of a refrigeration cabinets system according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENT(S) OF THE INVENTION
- orientational terms that have been mentioned or might be mentioned in this specification, such as“upper”,“lower”,“left”,“right”,“front”,“rear”,“front side”,“back side”,“top”,“bottom”, etc., are defined relative to the configurations shown in the drawings. They are relative concepts, so they may change accordingly according to their different locations and different states of use. Therefore, these or other orientational terms should not be interpreted as restrictive terms.
- a refrigeration cabinets system according to an embodiment of the present disclosure is provided, which can be used in large supermarkets, convenience stores, cake shops, etc.
- the refrigeration cabinets system includes: one or more indoor units 21, 22, 23, an outdoor unit 1, and a pipeline 3 connecting the indoor units 21, 22 and 23 with the outdoor unit 1.
- the one or more indoor units 21, 22, 23 may be in the form of a cabinet, and they may respectively include: indoor unit inlets 211, 221, indoor unit outlets 212, 222, expansion valves 213, 223 between the indoor unit inlets 211, 221 and the indoor unit outlets 212, 222, such as thermal expansion valves or electronic expansion valves, evaporators 214, 224 downstream of the expansion valves 213, 223, and a display cabinet cooled by the evaporators 214, 224.
- the display cabinet may be open or closed, the food in it is cooled by the evaporators, and the display cabinet is used to place and display the food. In general, the display cabinet may be located above or below the evaporators.
- the outdoor unit 1 includes: an outdoor unit inlet 11, an outdoor unit outlet 12, an inverter compressor 15 between the outdoor unit inlet 11 and the outdoor unit outlet 12, a pressure sensor 13 on an inlet side of the inverter compressor 15, a condenser 16 downstream of the inverter compressor 15, and a controller 14 for controlling an operating frequency of the inverter compressor 15.
- the outdoor unit outlet 12 is connected to each indoor unit inlet 211, 221 through a pipeline 31, and each indoor unit outlet 212, 222 is connected to the outdoor unit inlet 11 through pipelines 321, 322.
- the controller 14 is connected to the pressure sensor 13 to obtain pressure information of fluid on the inlet side of the inverter compressor 15, and the controller 14 changes the compressor frequency based on the pressure information to control the pressure at the outdoor unit inlet to be within a certain range, thereby controlling a saturated evaporation temperature of each indoor unit to be within a range of -1.5°C to +1.5°C.
- the pressure on the inlet side of the compressor is controlled to be within a certain range, so that the temperature at the outlets of the evaporators are controlled to be within a range of -1.5°C to +1.5°C, thereby avoiding frosting in the evaporators and ensuring the preservation temperature of the food is stable.
- the evaporators do not frost, there is no need to configure a defrost mode for the evaporators, which can improve the energy efficiency of the entire system.
- the evaporators do not have substantial frost, the density of the fins in the evaporators can also be increased, the heat exchange efficiency can be improved, and the refrigeration cabinets system can be operated stably in a humid environment.
- the controller 14 changes the operating frequency of the inverter compressor based on the pressure information to control the pressure on the suction side of the inverter compressor to be within a range of PI to P2, wherein R1+DR corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C, and R2+DR corresponds to the pressure of the saturated refrigerant at a temperature of +1 5°C, and wherein DR is a pressure correction value.
- the frequency of the inverter compressor 15 can be increased until the pressure on the suction side of the inverter compressor 15 is restored to the control range; otherwise, the frequency of the inverter compressor 15 is decreased.
- the pressure correction value DR may be determined based on field tests or depends on the lengths of the pipelines from the indoor unit outlets to the outdoor unit inlet. More specifically, since the goal is to control the temperature at the outlet of the evaporator of each indoor unit to be within a range of -1.5°C to +1.5°C, when the fluid flows from the outlet of each evaporator to the inlet side of the inverter compressor of the outdoor unit, there will be pressure loss DR, which depends on factors such as pipeline lengths and surrounding environment. Once the installation of the system is completed, it may be considered that the loss is basically determined.
- the saturation evaporation temperature (which corresponds to the pressure in an one-to- one correspondence) of each indoor unit has a correspondence to the pressure on the inlet side of the inverter compressor, and the goal of controlling the saturated evaporation temperature can be achieved by controlling the pressure on the inlet side of the inverter compressor.
- the pressure on the suction side of the inverter compressor can be controlled to be within the range of PI to P2, wherein R1+DR corresponds to the pressure of saturated refrigerant at a temperature of -1.5°C, R2+DR corresponds to the pressure of the saturated refrigerant at a temperature of +1.5°C, and DR may for example take an average pressure drop from each indoor unit to the suction side of the compressor, which may be estimated based on the pipeline lengths and empirical formulas related to the pipeline lengths, or may be set based on field commissioning results.
- the lengths of the pipelines from each of the indoor unit outlets to the outdoor unit inlet need to be set substantially the same when arranging the pipelines, thereby making the pressure losses of the pipelines be basically the same or closer to the pressure correction value DR.
- length differences of the pipelines from each of the indoor unit outlets to the outdoor unit inlet may range from -20% to +20%.
- the pipeline of the nearer indoor unit in front of the pipeline gathering point P, may include at least one detour, so that the lengths of the pipelines from the indoor unit outlet of each indoor unit to the pipeline gathering pipe P are basically the same.
- the evaporators may be located above or below the display cabinet, and a fin density of the evaporators is in a range of 6-14 FPI, wherein FPI represents the number of fins per inch of length.
- the evaporators may be located behind the display cabinet, and a fin density of the evaporators is in a range of 3-8 FPI. Since the indoor units according to the embodiment of the present disclosure do not have substantial frost, a thinner arrangement of the evaporators may be realized, so that the evaporators can be arranged on the back side of the refrigerator without occupying the spaces above or below the front side of the cabinet. Therefore, the display area on the front side of the cabinet of the refrigerator can be increased. In some embodiments, the indoor units do not have a defrost mode.
- a method for controlling a refrigeration cabinets system includes: collecting pressure information on a suction side of an inverter compressor; and changing an operating frequency of the inverter compressor based on the pressure information to control the pressure or temperature on the suction side of the inverter compressor to be within a certain range, thereby maintaining a saturated evaporation temperature of the evaporator of each indoor unit to be within a range of -1.5°C to +1.5°C.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910694650.3A CN112303978A (en) | 2019-07-30 | 2019-07-30 | Refrigeration cabinet system and control method thereof |
PCT/US2020/043244 WO2021021553A1 (en) | 2019-07-30 | 2020-07-23 | A refrigeration cabinet system and a control method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4004456A1 true EP4004456A1 (en) | 2022-06-01 |
EP4004456B1 EP4004456B1 (en) | 2024-04-10 |
Family
ID=72047075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20754499.0A Active EP4004456B1 (en) | 2019-07-30 | 2020-07-23 | A refrigeration cabinet system and a control method thereof |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4004456B1 (en) |
CN (1) | CN112303978A (en) |
FI (1) | FI4004456T3 (en) |
WO (1) | WO2021021553A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0301121B1 (en) * | 1987-07-30 | 1990-05-23 | Wieland-Werke Ag | Finned tube |
NZ304969A (en) * | 1995-03-14 | 1998-07-28 | Hussmann Corp | Refrigerated merchandiser having modular evaporator coils |
US7797957B2 (en) * | 2006-04-12 | 2010-09-21 | Hussmann Corporation | Methods and apparatus for linearized temperature control of commercial refrigeration systems |
JP5007185B2 (en) * | 2007-09-21 | 2012-08-22 | 三洋電機株式会社 | Refrigeration apparatus, control method and control program for refrigeration apparatus |
CN201996064U (en) * | 2010-12-16 | 2011-10-05 | 上海海洋大学 | Combined cooling showcase |
JP6040041B2 (en) * | 2013-02-12 | 2016-12-07 | サンデンホールディングス株式会社 | Showcase cooling system |
CN103591669B (en) * | 2013-10-18 | 2016-03-30 | 广东美的制冷设备有限公司 | The antifrost method of air-conditioning equipment and antifrost device, air-conditioning equipment |
CN104791943B (en) * | 2014-01-21 | 2017-08-29 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method, the outdoor unit of air-conditioning system |
CN105805995B (en) * | 2016-04-29 | 2017-11-24 | 郑州凯雪冷链股份有限公司 | More refrigerators share condensation unit autonomous control system |
CN207501529U (en) * | 2017-09-30 | 2018-06-15 | 天津九鼎医学生物工程有限公司 | A kind of energy-saving frequency conversion refrigerator |
-
2019
- 2019-07-30 CN CN201910694650.3A patent/CN112303978A/en active Pending
-
2020
- 2020-07-23 FI FIEP20754499.0T patent/FI4004456T3/en active
- 2020-07-23 WO PCT/US2020/043244 patent/WO2021021553A1/en unknown
- 2020-07-23 EP EP20754499.0A patent/EP4004456B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP4004456B1 (en) | 2024-04-10 |
FI4004456T3 (en) | 2024-04-18 |
WO2021021553A1 (en) | 2021-02-04 |
CN112303978A (en) | 2021-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1384039B1 (en) | Evaporator for medium temperature refrigerated merchandiser | |
US20070227166A1 (en) | Methods and apparatus for controlling refrigerators | |
EP2663817B1 (en) | Refrigeration system and method for operating a refrigeration system | |
CN105222459B (en) | Refrigerator | |
AU2002254641A1 (en) | Evaporator for medium temperature refrigerated merchandiser | |
EP1184634B1 (en) | A refrigerated merchandiser system and method of operating a refrigerated merchandiser system | |
US6955061B2 (en) | Refrigerated merchandiser with flow baffle | |
WO2005024314A2 (en) | Improvements in or relating to refrigeration | |
CN103134227B (en) | Refrigeration circulating system and single-system direct air-cooling refrigerator with same | |
US6311512B1 (en) | Refrigerated merchandiser system | |
US10837686B2 (en) | Control method for refrigerator | |
CN104068688A (en) | Open-type display cabinet and refrigeration device thereof | |
CN102338513A (en) | Refrigerating system and refrigerator with same | |
EP4004456B1 (en) | A refrigeration cabinet system and a control method thereof | |
EP1556653A1 (en) | Evaporator for a refrigeration system | |
US10215460B2 (en) | Variable expansion device with thermal choking for a refrigeration system | |
CN113899137A (en) | Refrigerator air duct structure and refrigerator | |
JP2018031487A (en) | Freezing and refrigeration showcase | |
JP6974089B2 (en) | Freezing / refrigerating showcase | |
CN104068689A (en) | Open-type display cabinet | |
CN216048597U (en) | Refrigerator air duct structure and refrigerator | |
Rainwater | Five defrost methods for commercial refrigeration | |
CN109564031A (en) | Refrigerating plant | |
Austin‐Davies | Design of Supermarket Refrigeration Systems | |
JP2017086158A (en) | Freezing/refrigerating show case |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
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 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210116 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20231026 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |