WO2021162653A1 - Refrigeration appliance with multiple air curtains - Google Patents
Refrigeration appliance with multiple air curtains Download PDFInfo
- Publication number
- WO2021162653A1 WO2021162653A1 PCT/TR2020/050164 TR2020050164W WO2021162653A1 WO 2021162653 A1 WO2021162653 A1 WO 2021162653A1 TR 2020050164 W TR2020050164 W TR 2020050164W WO 2021162653 A1 WO2021162653 A1 WO 2021162653A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- evaporator
- inner chamber
- air curtain
- appliance
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
- A47F3/0439—Cases or cabinets of the open type
- A47F3/0443—Cases or cabinets of the open type with forced air circulation
- A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
Definitions
- the present invention relates to industrial-type refrigeration appliances, in particular, to open front display cabinets without doors/covers.
- the present invention particularly relates to a refrigeration appliance that has multiple air curtains each of which can blow air of different temperatures, and that prevents/minimizes the entry of ambient air into the inner chamber to ensure that the air contained inside the inner chamber of refrigeration appliances is maintained at desired values with a minimum amount of energy consumption.
- Various refrigeration appliances are used for storing and preserving a product under a specific temperature value.
- Said refrigeration appliances comprise a body, and an inner chamber located inside said body for keeping the products at the desired temperature. While a door/cover is usually used for separating the inner chamber and the outer environment in some types of refrigeration appliances, certain refrigeration appliances utilized for displaying products in grocery stores, in particular, comprise no door/cover.
- the temperature of the inner chamber is required to be in the respective product temperature class as declared in EN 23953 standard while the appliance is working. Therefore, these appliances comprise a refrigeration system and said system operates periodically in order to keep the temperature of the inner chamber at and below the desired temperature value.
- the temperature of the inner chamber may exceed the desired temperature value, i.e. the air contained within the inner chamber may become warm since environments in which said refrigeration appliances operate are at room temperature (25°C). Accordingly, this causes the refrigeration appliance to operate for an extended period of time with additional energy consumption in order to refrigerate the inner chamber.
- a refrigeration unit in particular, a refrigerated display rack for cooling and displaying products, comprising a body and at least one product support located therein, further comprising at least one cooling air curtain, wherein said cooling air curtain leaves a cooling air duct in the body at an incoming air outlet thereof and flows along a body opening all the way to a return air inlet, and comprising a product rear wall, which is at least partially perforated and through which a cooling airflow flows and which is generated by means of at least one fan in the direction of the body opening, characterized in that cooling air duct comprises a separating plate which comprises a deflection area dividing the cooling airflow and is perforated at the outlet side thereof.
- the present invention relates to a refrigeration appliance having multiple air curtains that meets all the requirements mentioned above, eliminates all disadvantages and provides further advantages.
- the main object of the present invention is to provide a refrigeration appliance with multiple air curtains that prevents the hot air from getting into the inner chamber by ensuring proper curtaining between the points from which cold air is blown into and sucked out of the inner chamber; ensures that the cool air blown through the ambient temperature (25°C) due to the location of the appliance is kept from going into turbulation by means of providing proper air speeds; maintains product temperatures inside the inner chamber; allows for saving energy in open-front (not having door/cover) refrigeration appliances utilized for displaying products in grocery stores.
- the inventive refrigeration appliance is preferably provided with four air curtains capable of blowing air at different temperatures.
- the inner chamber of the inventive refrigeration appliance blows air at four different temperature values as +25 °C, +11 °C, +2 °C and 0 °C from the outermost portion to the innermost thereof, thereby allowing for saving energy by approximately 56% when compared to products having a single air curtain.
- Another object of the present invention is to provide a refrigeration appliance in the sector of industrial or commercial type refrigerator and display sections performing manufacturing activities in accordance with the EN 23953 standard, that reaches to the EEI (Energy Efficiency Index) value as disclosed in the EuroVent standard, through minimum amount of energy consumption by means of the multiple air curtain system.
- EEI Energy Efficiency Index
- FIGURE - 1 illustrates the perspective view of the inventive refrigeration appliance.
- FIGURE - 2 illustrates the sectional view of the multiple air curtain of the inventive refrigeration appliance.
- FIGURE - 3 illustrates the detailed sectional view of the multiple air curtain of the inventive refrigeration appliance.
- the inventive refrigeration appliance (A) is preferably an industrial refrigerator having at least one open portion (top or side portion), and in which products are displayed in various areas such as grocery stores, butcher shops, delicatessen, and charcuteries. Additionally, it may also be a refrigerator having a door/cover ( Figure-1).
- air curtains which preserve the quality of cooled air, i.e. conditioned air, contained inside the inner chamber and keep hot/cold/polluted ambient air having unfavorable conditions including humidity, dust, and insects such as flies from entering the inner chamber are implemented in order to prevent the ambient air (hot air) from entering the inner chamber.
- the air curtain performs blocking action by means of blowing air at a certain speed with either horizontal or vertical airflow based on the usage of the appliance.
- Air curtain systems used in available applications ensure that air is blown into the inner chamber through one or two ducts, thereby trying to prevent the ambient air from entering the inner chamber of the refrigeration appliance.
- a secondary polyurethane inner body (2) comprising of a roof, rear wall and lower body, is arranged inside the polyurethane outer body (1) in order to minimize the heat losses.
- the inventive refrigeration appliance (A) comprises an evaporator (3) for cooling the air.
- the air cooled in said evaporator (3) is moved by means of an evaporator fan (4), thereby creating air circulation within the appliance.
- cold air on the surface of the evaporator (3) is conducted into the inner chamber through the extreme cold air curtain duct (8) by means of the evaporator fan (4) and is returned to the evaporator (3) by being sucked from the air suction point (9) located at the lower portion of the inner chamber, thereby maintaining the air circulation.
- This is the first air curtain within the inventive appliance, and it is the air curtain through which the coldest air is being blown.
- the warmer air sucked from the air suction point (9) comes out of a return/recovery air curtain duct (6) area by passing over the inner body (2) which is the secondary polyurethane structure formed inside inner chamber, by means of a heat recovery fan (10) and without being passed over the evaporator (3), thereby creating a third air curtain.
- Ambient air found in the location in which the inventive refrigeration appliance is positioned is sucked by means of an external air fan (11) and conducted directly into the inner chamber of the appliance through the hot air curtain duct (5), thereby creating a fourth air curtain, in order to reduce the turbulation that may potentially occur due to the temperature differences that arise when the hot air and the cold air collide in the inventive refrigeration appliance.
- the inventive refrigeration appliance with multiple air curtains (A) preferably comprises four air curtains that function in the manner disclosed above. Arrangement of said air curtains from the outermost portion of the product (closest to the external environment) to the innermost thereof and preferred air temperatures blown into the inner chamber are as follows;
- Air temperature values mentioned above are preferred values and air temperatures in other ducts may vary in a suitable threshold in a manner in which the hot air curtain duct (5) which is the closest to the external environment, blows the hottest air, and the extreme cold air curtain duct (8) which is the innermost duct, blows the coldest air.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The present invention relates to industrial-type refrigeration appliances (A), in particular, to open front display cabinets without doors/covers, that has multiple air curtains each of which can blow air of different temperatures, and that prevents/minimizes the entry of ambient air into the inner chamber to ensure that the air contained inside the inner chamber of refrigeration appliances is maintained at desired values with a minimum amount of energy consumption.
Description
REFRIGERATION APPLIANCE WITH MULTIPLE AIR CURTAINS
TECHNICAL FIELD OF THE INVENTION
The present invention relates to industrial-type refrigeration appliances, in particular, to open front display cabinets without doors/covers.
The present invention particularly relates to a refrigeration appliance that has multiple air curtains each of which can blow air of different temperatures, and that prevents/minimizes the entry of ambient air into the inner chamber to ensure that the air contained inside the inner chamber of refrigeration appliances is maintained at desired values with a minimum amount of energy consumption.
STATE OF THE ART
Various refrigeration appliances are used for storing and preserving a product under a specific temperature value. Said refrigeration appliances comprise a body, and an inner chamber located inside said body for keeping the products at the desired temperature. While a door/cover is usually used for separating the inner chamber and the outer environment in some types of refrigeration appliances, certain refrigeration appliances utilized for displaying products in grocery stores, in particular, comprise no door/cover.
In refrigeration appliances, the temperature of the inner chamber is required to be in the respective product temperature class as declared in EN 23953 standard while the appliance is working. Therefore, these appliances comprise a refrigeration system and said system operates periodically in order to keep the temperature of the inner chamber at and below the desired temperature value. However, the temperature of the inner chamber may exceed the desired temperature value, i.e. the air contained within the inner chamber may become warm since environments in which said refrigeration appliances operate are at room temperature (25°C). Accordingly, this causes the refrigeration appliance to operate for an extended period of time with additional energy consumption in order to refrigerate the inner chamber.
With regards to open-front (without door/cover) refrigeration appliances utilized for displaying products in grocery stores, there are a number of important matters such as; preventing the hot air from getting into the inner chamber by means of proper curtaining between the points
from which cold air is blown into and sucked out of the inner chamber; ensuring that cool air blown through the ambient temperature (25 °C) due to the location of the appliance, is kept from going into turbulation by means of providing proper air speeds; maintaining product temperatures inside the inner chamber; and allowing for saving energy.
In the state of the art, refrigeration appliances that do not have doors/covers utilize various air curtaining applications in order to prevent the ambient air (hot air) from entering the inner chamber. Air curtain systems used in available applications ensure that air is blown into the inner chamber through one or two ducts, thereby trying to prevent the ambient air from entering the inner chamber of the refrigeration appliance.
Another disadvantage of the open front refrigeration appliance used in the state of the art is that these appliances comprise a single main body made of polyurethane material. In other words, heat transfer (loss of heat) occurs from an insulated surface of 40-50 mm thickness which separates the temperature of the appliance's inner chamber and the temperature of the environment in which the appliance is located.
The patent document titled "Refrigeration Unit" and numbered XR2812574B1 determined as a result of the literature search conducted in the state of the art discloses "A refrigeration unit, in particular, a refrigerated display rack for cooling and displaying products, comprising a body and at least one product support located therein, further comprising at least one cooling air curtain, wherein said cooling air curtain leaves a cooling air duct in the body at an incoming air outlet thereof and flows along a body opening all the way to a return air inlet, and comprising a product rear wall, which is at least partially perforated and through which a cooling airflow flows and which is generated by means of at least one fan in the direction of the body opening, characterized in that cooling air duct comprises a separating plate which comprises a deflection area dividing the cooling airflow and is perforated at the outlet side thereof. When the respective document is examined, it is understood that said unit utilizes a single air curtain system.
In the state of the art, the major disadvantage of the open front refrigeration systems having a single or two air curtain system is that these refrigeration systems consume high amounts of energy in order to reach the EEI (Energy Efficiency Index) value as stated in the EuroVent standard in the sector of industrial or commercial type refrigerator and display sections performing manufacturing activities in accordance with the EN 23953 standard. As trying to
meet these standards by using existing appliances/cabinets with a single or two air curtains results in consuming a high amount of energy, it became necessary to set forth a novelty and to provide a technical solution.
OBJECTS OF THE INVENTION
The present invention relates to a refrigeration appliance having multiple air curtains that meets all the requirements mentioned above, eliminates all disadvantages and provides further advantages.
The main object of the present invention is to provide a refrigeration appliance with multiple air curtains that prevents the hot air from getting into the inner chamber by ensuring proper curtaining between the points from which cold air is blown into and sucked out of the inner chamber; ensures that the cool air blown through the ambient temperature (25°C) due to the location of the appliance is kept from going into turbulation by means of providing proper air speeds; maintains product temperatures inside the inner chamber; allows for saving energy in open-front (not having door/cover) refrigeration appliances utilized for displaying products in grocery stores.
In order to achieve the object mentioned above, the inventive refrigeration appliance is preferably provided with four air curtains capable of blowing air at different temperatures. Preferably, the inner chamber of the inventive refrigeration appliance blows air at four different temperature values as +25 °C, +11 °C, +2 °C and 0 °C from the outermost portion to the innermost thereof, thereby allowing for saving energy by approximately 56% when compared to products having a single air curtain.
Another object of the present invention is to provide a refrigeration appliance in the sector of industrial or commercial type refrigerator and display sections performing manufacturing activities in accordance with the EN 23953 standard, that reaches to the EEI (Energy Efficiency Index) value as disclosed in the EuroVent standard, through minimum amount of energy consumption by means of the multiple air curtain system.
Yet another object of the present invention is to provide a refrigeration appliance in which a secondary polyurethane body comprising of a roof, rear wall and lower body is arranged in order to recover heat losses.
Yet another object of the present invention is to provide a refrigeration appliance that consumes much less electrical energy than the amounts stated in A+++ standards, that features much less ozone-depleting gas emission, that makes significant contributions for extending the shelf life of foodstuffs, that releases less heat to the environment, that generates much less noise by means of having a smaller refrigeration group, and that requires much smaller area for assembly.
The structural and characteristic features of the present invention will be understood clearly by the following drawings and the detailed description provided with reference to these drawings, and therefore the respective evaluation should be conducted by taking these figures and the detailed description into consideration.
BRIEF DESCRIPTION OF THE FIGURES
The present invention should be evaluated with the figures described below in order to ensure the best understanding of the embodiment and all advantages together with the additional components of the invention.
FIGURE - 1 illustrates the perspective view of the inventive refrigeration appliance.
FIGURE - 2 illustrates the sectional view of the multiple air curtain of the inventive refrigeration appliance.
FIGURE - 3 illustrates the detailed sectional view of the multiple air curtain of the inventive refrigeration appliance.
REFERENCE NUMERALS
A. Refrigeration Appliance
1. Outer Body
2. Inner Body
3. Evaporator / Heat Exchanger
4. Evaporator Fan
5. Hot Air Curtain Duct
6. Return/Recovery Air Curtain Duct
7. Cold Air Curtain Duct
8. Extreme Cold Air Curtain Duct
9. Air Suction Point
10. Heat Recovery Fan
11. External Air Fan
Scaling of figures is not absolutely required and details, which are not needed for understanding the present invention, may have been neglected. Furthermore, elements, which are at least substantially identical or have at least substantially identical functions, are indicated with the same number.
DETAILED DESCRIPTION OF THE INVENTION
In the detailed description provided herein, preferred embodiments of the inventive refrigeration appliance with multiple air curtains are disclosed only to ensure a better understanding of the subject and without creating any limiting effects.
The inventive refrigeration appliance (A) is preferably an industrial refrigerator having at least one open portion (top or side portion), and in which products are displayed in various areas such as grocery stores, butcher shops, delicatessen, and charcuteries. Additionally, it may also be a refrigerator having a door/cover (Figure-1).
In refrigeration appliances (A), invisible door applications named air curtains, which preserve the quality of cooled air, i.e. conditioned air, contained inside the inner chamber and keep hot/cold/polluted ambient air having unfavorable conditions including humidity, dust, and insects such as flies from entering the inner chamber are implemented in order to prevent the ambient air (hot air) from entering the inner chamber. The air curtain performs blocking action by means of blowing air at a certain speed with either horizontal or vertical airflow based on the usage of the appliance. Air curtain systems used in available applications ensure that air is blown into the inner chamber through one or two ducts, thereby trying to prevent the ambient air from entering the inner chamber of the refrigeration appliance.
In the inventive refrigeration appliance (A), a secondary polyurethane inner body (2) comprising of a roof, rear wall and lower body, is arranged inside the polyurethane outer body (1) in order to minimize the heat losses.
The inventive refrigeration appliance (A) comprises an evaporator (3) for cooling the air. The air cooled in said evaporator (3) is moved by means of an evaporator fan (4), thereby creating air circulation within the appliance.
As illustrated in Figure-2, cold air on the surface of the evaporator (3) is conducted into the inner chamber through the extreme cold air curtain duct (8) by means of the evaporator fan (4) and is returned to the evaporator (3) by being sucked from the air suction point (9) located at the lower portion of the inner chamber, thereby maintaining the air circulation. This is the first air curtain within the inventive appliance, and it is the air curtain through which the coldest air is being blown. Air going through a secondary cool air duct with partitioned metal sheet, namely cold air curtain duct (7) arranged on the evaporator (3) by means of the evaporator fan (4) creates a second air curtain and is returned to the evaporator by being sucked from the air suction point (9), thereby maintaining the air circulation.
Subsequently, the warmer air sucked from the air suction point (9) comes out of a return/recovery air curtain duct (6) area by passing over the inner body (2) which is the secondary polyurethane structure formed inside inner chamber, by means of a heat recovery fan (10) and without being passed over the evaporator (3), thereby creating a third air curtain.
Ambient air found in the location in which the inventive refrigeration appliance is positioned, is sucked by means of an external air fan (11) and conducted directly into the inner chamber of the appliance through the hot air curtain duct (5), thereby creating a fourth air curtain, in order to reduce the turbulation that may potentially occur due to the temperature differences that arise when the hot air and the cold air collide in the inventive refrigeration appliance.
The inventive refrigeration appliance with multiple air curtains (A) preferably comprises four air curtains that function in the manner disclosed above. Arrangement of said air curtains from the outermost portion of the product (closest to the external environment) to the innermost thereof and preferred air temperatures blown into the inner chamber are as follows;
• Hot Air Curtain Duct (5); Temperature of the Air Blown: 25 °C
• Return/Recovery Air Curtain Duct (6); Temperature of the Air Blown: 11 °C
• Cold Air Curtain Duct (7); Temperature of the Air Blown: 2 °C
• Extreme Cold Air Curtain Duct (8); Temperature of the Air Blown: 0 °C
Air temperature values mentioned above are preferred values and air temperatures in other ducts may vary in a suitable threshold in a manner in which the hot air curtain duct (5) which
is the closest to the external environment, blows the hottest air, and the extreme cold air curtain duct (8) which is the innermost duct, blows the coldest air.
Claims
1. An industrial type refrigeration appliance (A), in particular, open front display cabinets without doors/covers, comprising;
• at least one evaporator (3) that cools the air circulating inside said appliance,
• at least one evaporator fan (4) that ensures the circulation of the air cooled in said evaporator (3),
• at least one air suction point (9) which is positioned inside the inner chamber and which ensures that the air is sucked and returned to the evaporator (3) and/or inner body (2), characterized by comprising;
• extreme cold air curtain duct (8) through which the cold air on the surface of said evaporator (3) is conducted to the inner chamber of the appliance by means of said evaporator fan (4),
• a secondary cold air duct, namely, cold air curtain duct (7) through which the cold air, taken through the evaporator fan (4) is conducted to the inner chamber by getting separated through the partitioned metal sheet structure arranged on the evaporator (3),
• a return/recovery air curtain duct (6) which is the third air curtain through which the warmer air sucked from air suction point (9) comes out by passing over inner body (2) which is the secondary polyurethane structure formed inside inner chamber, by means of heat recovery fan (10) and without being passed over the evaporator (3),
• hot air curtain duct (5) that creates the fourth air curtain by sucking the ambient air located in the environment in which the appliance is positioned, by means of external air fan (11) and conducting it directly into warm appliance,
• at least one heat recovery fan (10) which ensures that the air sucked from the air suction point (9) returns to the inner chamber without passing over the evaporator
(4), over the inner body (2) which a secondary polyurethane structure formed within the inner chamber,
• at least one external air fan (11) that sucks ambient air located in the environment in which the appliance is positioned and conducts it to the hot air curtain duct (5).
2. Industrial type refrigeration appliance (A) according to Claim 1, characterized in that, said air curtains are arranged respectively from the outermost portion of the product (closest to the external environment) to the innermost thereof as; hot air curtain duct (5), return/recovery air curtain duct (6), cold air curtain duct (7) and extreme cold air curtain duct (8).
3. Industrial type refrigeration appliance (A) according to Claim 1, characterized in that, preferred temperature values of air blown by said air curtains are respectively 25°C, 11°C, 2°C, 0°C from the outermost portion of the product (closest to the external environment) to the innermost thereof.
4. Industrial type refrigeration appliance (A) according to Claim 1, characterized in that, it comprises a secondary polyurethane inner body (2) comprising of a roof, rear wall, and lower body, wherein said inner body is formed inside the polyurethane outer body (1) in order to minimize heat losses and wherein said inner body facilitates creating the return/recovery air curtain duct (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2020/02269 | 2020-02-14 | ||
| TR202002269 | 2020-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021162653A1 true WO2021162653A1 (en) | 2021-08-19 |
Family
ID=77292484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2020/050164 WO2021162653A1 (en) | 2020-02-14 | 2020-02-28 | Refrigeration appliance with multiple air curtains |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2021162653A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3063252A (en) * | 1961-08-17 | 1962-11-13 | Lamb Frank Gilbert | Upright refrigerator showcase |
| US3289432A (en) * | 1965-08-06 | 1966-12-06 | Emhart Corp | Display case |
| US5357767A (en) * | 1993-05-07 | 1994-10-25 | Hussmann Corporation | Low temperature display merchandiser |
-
2020
- 2020-02-28 WO PCT/TR2020/050164 patent/WO2021162653A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3063252A (en) * | 1961-08-17 | 1962-11-13 | Lamb Frank Gilbert | Upright refrigerator showcase |
| US3289432A (en) * | 1965-08-06 | 1966-12-06 | Emhart Corp | Display case |
| US5357767A (en) * | 1993-05-07 | 1994-10-25 | Hussmann Corporation | Low temperature display merchandiser |
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