WO2021156896A1 - Refrigerated display cabinet - Google Patents
Refrigerated display cabinet Download PDFInfo
- Publication number
- WO2021156896A1 WO2021156896A1 PCT/IT2021/050017 IT2021050017W WO2021156896A1 WO 2021156896 A1 WO2021156896 A1 WO 2021156896A1 IT 2021050017 W IT2021050017 W IT 2021050017W WO 2021156896 A1 WO2021156896 A1 WO 2021156896A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- display cabinet
- deflector
- containers
- refrigerated display
- Prior art date
Links
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
- A47F3/0404—Cases or cabinets of the closed type
- A47F3/0417—Cases or cabinets of the closed type with natural air circulation
Definitions
- the present invention refers to a refrigerated display cabinet for ice creams, pastry products and the like, which consists of a cabinet cooled by a refrigerating system that allows these products to be stored and displayed within prescribed temperature limits.
- this known display (1) usually comprises:
- a motor-compressor (not shown) and a condensing unit (not shown) contained in a housing inside the body (2) in a non-insulated part thereof and which use primary refrigerating means, such as
- an upper transparent structure (5) typically made of glass, placed above the insulated body (2) and equipped with a closing system (6) to allow access to the food to be served or to close the refrigerated compartment when it is not used, the structure (5) preferably being a counter or a self-service structure; and
- a closed storage tank (7) contained in the insulated body (2) and which serves to contain additional foods that are not exposed, also accessible through an opening system located on the bottom of the insulated body (2).
- the aforementioned conventional refrigerated displays (1) for ice cream or pastes which use the principle of static refrigeration, in which the low-temperature air is stratified lower, touching the top of the food after it has fallen from the evaporator (4), so that the evaporator (4) is always above the food (3), contain the food in the insulated body (2) about 150 mm below its edge; this ensures that the food is stored at the prescribed temperature, but reduces the visibility, and thus the viewing capacity, of the cabinet especially if approached from a distance of a few meters.
- transparent insulating bodies or glass can be used, which are heated, and composed of a single panel or composed of a sealed glass unit, called double glazing, typically silk-screened, which it can also be heated or not, according to its thermal transmission property.
- the main object of the invention is providing a refrigerated display cabinet that improves the visibility of the food, allows significant energy savings (by doing without a heated glass) and allows to consequently reduce its final production cost.
- FIG. 1 is a perspective view of an embodiment of a refrigerated display cabinet according to the present invention.
- FIG. 2 is a side sectional view of the refrigerated display cabinet of Figure 1;
- FIG. 3 is a side sectional view of the refrigerated display cabinet of Figure 1 which shows the movement of air inside it.
- the refrigerated display cabinet (1) of the invention achieves the intended purposes by providing to lower the insulating body (2) on its front part and/or on the sides of the refrigerating display cabinet (1) in which the food is cooled by convection static, using:
- deflector (8) for the air placed adjacent to the evaporator (4) and between the evaporator (4) and the containers (3);
- a secondary barrier (5) consisting of the upper transparent structure (5) which is not heated, and is designed to create a gap with the main containment barrier (9).
- the heating cabinet display (1) may further comprise at least one heating element, not shown and preferably of the resistance type, designed to heat the gap between the secondary barrier (5) and the main containment barrier (9) in order to prevent a fogging of the upper transparent structure (5).
- the deflector (8) is designed to cooperate with the evaporator (4) so as to allow the passage of air in a closed loop above the deflector (8) and towards the containers (3).
- This passage can be achieved by providing that the deflector (8) allows warmer air to enter from the top and cooled air to escape from the lower part (4), so as to obtain two horizontal spaces one above, the other below the deflector (8) itself for the passage of air.
- the deflector (8) could be equipped with at least one opening (not shown), and preferably a series of openings, for the passage of air, each of these openings being placed along its surface on the long side of the deflector (8).
- the refrigerated display cabinet (1) described above conveys the colder air coming from the evaporator (4) right above the food, and the cold air, pushed by the new air coming from the evaporator (4), moves forward, on a plane that is parallel to the food, until it meets the main barrier (9).
- air is heated by an external heat flow due to the temperature difference between internal and external air of the refrigerated display cabinet (1), which is at ambient temperatures, in a typical temperature range of 20 °C - 35 °C.
- This heat flow heats cold air in the refrigerated display cabinet (1), which is between the deflector (8) and the main barrier (9), which can be understood as a containment basin.
- This air as it heats up increases its static pressure decreasing in density, lighter than the cold air, and rises and moves back towards the evaporator (4) to compensate for the air moving downwards, once cooled by the evaporator (4).
- the refrigerated display cabinet (1) is therefore designed so that the main barrier (9) prevents cold air from overflowing from the basin and directly cools the secondary barrier (5) and the deflector (8), which is designed so that the further supply of cold air from the evaporator (4) falls downwards towards the food, and allows the warmer air that is being raised to access the evaporator (4) from above.
- the refrigerated display cabinet (1) is then completed by the secondary barrier (5) which creates an intermediate layer of air at a warmer temperature than the air in the cold basin, but at a lower temperature than the outside air, and avoids that the air flow from the external environment interrupts the static cooling ring (10) which creates the barrier-deflector system.
- the static refrigerant ring provides cold air that cools the food and a recirculation of air that prevents the warmer air coming from the external environment through the opening cover (6) from condensing on the cold internal surfaces of the display cabinet (1).
- Another contribution to technological improvement is that, by not using heated glass, the refrigerated display cabinet (1) with a static refrigeration ring helps reducing energy consumptions.
Abstract
A display cabinet (1) is described including: an isolated body (2); a structure to support containers (3) for the preserved food; an evaporator (4) placed next to the containers (3); a motor compressor and a condensing unit; an upper transparent structure (5) equipped with a closing system (6); a deflector (8) for air placed adjacent to the evaporator (4) and between the evaporator (4) and the containers (3); a main containment barrier (9) perimeter and placed around three sides of the containers (3); and a secondary barrier (5), consisting of the upper transparent structure (5) which is not heated, and is designed to create a gap with the main containment barrier (9), wherein a heating element is provided to heat the gap between the secondary barrier (5) and the main containment barrier (9) in order to prevent fogging of the upper transparent structure (5).
Description
REFRIGERATED DISPLAY CABINET
The present invention refers to a refrigerated display cabinet for ice creams, pastry products and the like, which consists of a cabinet cooled by a refrigerating system that allows these products to be stored and displayed within prescribed temperature limits.
As illustrated in Figures 1 and 2, this known display (1) usually comprises:
- an isolated body (2); - a structure to support containers (3) or similar that contain the preserved food, the structure being contained within the insulated body (2);
- an evaporator (4) contained in the insulated body (2), placed next to the containers (3) and designed to operate by natural convection where the secondary refrigerant fluid is air;
- a motor-compressor (not shown) and a condensing unit (not shown) contained in a housing inside the body (2) in a non-insulated part thereof
and which use primary refrigerating means, such as
R290 and the like;
- an upper transparent structure (5), typically made of glass, placed above the insulated body (2) and equipped with a closing system (6) to allow access to the food to be served or to close the refrigerated compartment when it is not used, the structure (5) preferably being a counter or a self-service structure; and
- usually, a closed storage tank (7) contained in the insulated body (2) and which serves to contain additional foods that are not exposed, also accessible through an opening system located on the bottom of the insulated body (2).
The aforementioned conventional refrigerated displays (1) for ice cream or pastes, which use the principle of static refrigeration, in which the low-temperature air is stratified lower, touching the top of the food after it has fallen from the evaporator (4), so that the evaporator (4) is always above the food (3), contain the food in the insulated body (2) about 150 mm below its edge; this ensures that the food is stored at the prescribed temperature, but reduces the visibility, and thus the viewing capacity, of the cabinet
especially if approached from a distance of a few meters. To increase the visibility of this refrigerated display cabinet, transparent insulating bodies or glass can be used, which are heated, and composed of a single panel or composed of a sealed glass unit, called double glazing, typically silk-screened, which it can also be heated or not, according to its thermal transmission property.
Therefore, the main object of the invention is providing a refrigerated display cabinet that improves the visibility of the food, allows significant energy savings (by doing without a heated glass) and allows to consequently reduce its final production cost.
The above and other objects and advantages of the invention, as will emerge from the following description, are achieved with a refrigerated display cabinet as claimed in claim 1. Preferred embodiments and non-trivial variations of the present invention are the subject of the dependent claims.
It is understood that all enclosed claims are an integral part of the present description.
The present invention will be better described
by some preferred embodiments thereof, provided by way of a non-limiting example, with reference to the attached drawings, in which:
- Figure 1 is a perspective view of an embodiment of a refrigerated display cabinet according to the present invention;
- Figure 2 is a side sectional view of the refrigerated display cabinet of Figure 1; and
- Figure 3 is a side sectional view of the refrigerated display cabinet of Figure 1 which shows the movement of air inside it.
With reference to the Figures, a preferred embodiment of the present invention is shown and described. It will be immediately obvious that numerous variations and modifications (for example related to shape, dimensions, various colours and parts with equivalent functionality) can be made to what is described without departing from the scope of the invention as appears from the attached claims.
The refrigerated display cabinet (1) of the invention achieves the intended purposes by providing to lower the insulating body (2) on its front part and/or on the sides of the refrigerating display cabinet (1) in which the food is cooled by
convection static, using:
- a deflector (8) for the air placed adjacent to the evaporator (4) and between the evaporator (4) and the containers (3);
- a main containment barrier (9), preferably transparent, C-shaped and placed around three sides of the containers (3); and
- a secondary barrier (5), consisting of the upper transparent structure (5) which is not heated, and is designed to create a gap with the main containment barrier (9).
The heating cabinet display (1) may further comprise at least one heating element, not shown and preferably of the resistance type, designed to heat the gap between the secondary barrier (5) and the main containment barrier (9) in order to prevent a fogging of the upper transparent structure (5).
Furthermore, the deflector (8) is designed to cooperate with the evaporator (4) so as to allow the passage of air in a closed loop above the deflector (8) and towards the containers (3).
This passage can be achieved by providing that the deflector (8) allows warmer air to enter from the top and cooled air to escape from the lower
part (4), so as to obtain two horizontal spaces one above, the other below the deflector (8) itself for the passage of air.
To increase the aforementioned air passage, the deflector (8) could be equipped with at least one opening (not shown), and preferably a series of openings, for the passage of air, each of these openings being placed along its surface on the long side of the deflector (8).
With this configuration, as shown in Figure 3, the refrigerated display cabinet (1) described above, thanks to the deflector (8), conveys the colder air coming from the evaporator (4) right above the food, and the cold air, pushed by the new air coming from the evaporator (4), moves forward, on a plane that is parallel to the food, until it meets the main barrier (9). In this process, air is heated by an external heat flow due to the temperature difference between internal and external air of the refrigerated display cabinet (1), which is at ambient temperatures, in a typical temperature range of 20 °C - 35 °C.
This heat flow heats cold air in the refrigerated display cabinet (1), which is between the deflector (8) and the main barrier (9), which
can be understood as a containment basin. This air as it heats up, increases its static pressure decreasing in density, lighter than the cold air, and rises and moves back towards the evaporator (4) to compensate for the air moving downwards, once cooled by the evaporator (4).
The refrigerated display cabinet (1) is therefore designed so that the main barrier (9) prevents cold air from overflowing from the basin and directly cools the secondary barrier (5) and the deflector (8), which is designed so that the further supply of cold air from the evaporator (4) falls downwards towards the food, and allows the warmer air that is being raised to access the evaporator (4) from above.
The refrigerated display cabinet (1) is then completed by the secondary barrier (5) which creates an intermediate layer of air at a warmer temperature than the air in the cold basin, but at a lower temperature than the outside air, and avoids that the air flow from the external environment interrupts the static cooling ring (10) which creates the barrier-deflector system.
The static refrigerant ring provides cold air that cools the food and a recirculation of air that
prevents the warmer air coming from the external environment through the opening cover (6) from condensing on the cold internal surfaces of the display cabinet (1). Another contribution to technological improvement is that, by not using heated glass, the refrigerated display cabinet (1) with a static refrigeration ring helps reducing energy consumptions.
Claims
1. Refrigerated display cabinet (1) comprising:
- an isolated body (2);
- a structure to support containers (3) that contain the preserved food, the structure being contained within the insulated body (2);
- an evaporator (4) contained in the insulated body (2), placed next to the containers (3) and designed to operate by natural convection, where the secondary refrigerant fluid is air;
- a motor-compressor and a condensing unit contained in a non-insulated portion of the insulated body (2) and which use primary refrigerating means, such as R290;
- an upper transparent structure (5), typically made of glass, placed above the insulated body (2) and equipped with a locking system (6) to allow accessing the food to be served or closing the refrigerated compartment when it is not used;
- a deflector (8) for air placed adjacent to the evaporator (4) and between the evaporator (4) and the containers (3);
- a main containment barrier (9), preferably transparent and on a perimeter, placed around three sides of the containers (3); and
a secondary barrier (5), consisting of the upper transparent structure (5) which is not heated, and is designed to create a gap with the main containment barrier (9), characterized in that it also comprises at least one heating element designed to heat the gap between the secondary barrier (5) and the main containment barrier (9) in order to prevent fogging of the upper transparent structure (5).
2. Refrigerated display cabinet (1) according to claim 1, characterized in that the deflector (8) is designed to cooperate with the evaporator (4) so as to allow the passage of air in a closed loop above the deflector (8) and towards the containers (3).
3. Refrigerated display cabinet (1) according to claim 2, characterized in that the deflector (8) is designed to allow warmer air to enter from the top and cooled air to escape from the bottom (4), so as to obtain two horizontal spaces, one above, the other below the deflector (8) itself for the passage of air.
4. Refrigerated display cabinet (1) according to claim 1, 2 or 3, characterized in that the deflector (8) is equipped with at least one air passage opening along its surface.
5. Refrigerated display cabinet (1) according to claim 1, characterized in that said heating element is of the resistance type.
6. Refrigerated display cabinet (1) according to any one of the preceding claims, characterized in that it further comprises a closed storage reserve compartment (7) contained in the insulated body (2) and which serves to contain further foods which are not exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21705629.0A EP4099870B1 (en) | 2020-02-03 | 2021-01-21 | Refrigerated display cabinet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102020000002089 | 2020-02-03 | ||
| IT202000002089 | 2020-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021156896A1 true WO2021156896A1 (en) | 2021-08-12 |
Family
ID=70480508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2021/050017 WO2021156896A1 (en) | 2020-02-03 | 2021-01-21 | Refrigerated display cabinet |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4099870B1 (en) |
| WO (1) | WO2021156896A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2014590A (en) * | 1933-05-01 | 1935-09-17 | Ernest E Sanders | Show case refrigerator |
| EP0004672A2 (en) * | 1978-04-05 | 1979-10-17 | Linde Aktiengesellschaft | Cooled counter |
| DE3742853A1 (en) * | 1987-12-17 | 1989-06-29 | Suemak Kaeltetechnik Gmbh | Sales display counter |
| FR2658274A1 (en) * | 1990-02-15 | 1991-08-16 | Europ Ind Froid | Refrigerated display cabinet (window) and its method of refrigeration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3933315B1 (en) * | 2020-06-30 | 2023-08-23 | Carrier Corporation | Refrigerated display case and method of manufacturing thereof |
-
2021
- 2021-01-21 EP EP21705629.0A patent/EP4099870B1/en active Active
- 2021-01-21 WO PCT/IT2021/050017 patent/WO2021156896A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2014590A (en) * | 1933-05-01 | 1935-09-17 | Ernest E Sanders | Show case refrigerator |
| EP0004672A2 (en) * | 1978-04-05 | 1979-10-17 | Linde Aktiengesellschaft | Cooled counter |
| DE3742853A1 (en) * | 1987-12-17 | 1989-06-29 | Suemak Kaeltetechnik Gmbh | Sales display counter |
| FR2658274A1 (en) * | 1990-02-15 | 1991-08-16 | Europ Ind Froid | Refrigerated display cabinet (window) and its method of refrigeration |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4099870B1 (en) | 2024-02-28 |
| EP4099870A1 (en) | 2022-12-14 |
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