WO2011074994A1 - Air curtain generator for refrigerated display case - Google Patents
Air curtain generator for refrigerated display case Download PDFInfo
- Publication number
- WO2011074994A1 WO2011074994A1 PCT/PL2009/000108 PL2009000108W WO2011074994A1 WO 2011074994 A1 WO2011074994 A1 WO 2011074994A1 PL 2009000108 W PL2009000108 W PL 2009000108W WO 2011074994 A1 WO2011074994 A1 WO 2011074994A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- display case
- display
- chamber
- outlet
- 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
- A47F3/0439—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 utility model comprises an air curtain generator for refrigerated display case, particularly for vertical display cases.
- Refrigerated display cases are usually used in commercial establishments for storage and presentation purposes of food in temperatures lower than the ambient temperature.
- Such display cases consist of a display chamber with thermally isolated walls and an open front and separated from the surroundings by an curtain of air cooled to a temperature below the temperature of the surroundings.
- a refrigerated display case is known, with the display chamber surrounded by walls made of internal and external layers, with isolation between them.
- the bottom part of the display case comprises a ventilation set and an evaporator, from which along the back and the upper walls a channel runs with an outlet located outside the display chamber and directed downwards.
- the air, pushed by a fan and cooled in the evaporator is exhausted through an upper outlet, and flowing down along the display chamber creates an air curtain that separates the chamber from the surroundings, thus allowing to keep the temperature in the chamber lower than the ambient temperature.
- a vertical display case is included, the shape of which is inscribed in a cuboid.
- a chamber with a cover in the front in the form of a louver wall.
- a fan is mounted that sucks in the air from the outside.
- Behind the fan there is a heat exchanger that cools down the air that was suck in.
- the chamber has an outlet to a channel that runs within the back wall of the display case and has holes on different levels. The holes let the air inside the display chamber. Next, the channel goes within the upper wall of the display chamber to outlets directed downwards.
- the upper wall of the display case has an inlet for the surrounding air, wherefrom a channel runs to the downward outlet. Behind the outlet, a fan is mounted that sucks the air in and pushes it into the outlet, wherefrom it flows downwards as an external stream of the air curtain.
- the solution according to the utility model consists in that in the lower part of the refrigerated display case there is an outlet of the warmer air system, to which a channel is connected, the starting part of which runs along the bottom wall of the display case, its middle part runs along the back wall of the display case, and its end ; part runs along the top wall of the display case, having at the end an outlet of warmer air.
- This outlet is located outside the outlet of cooler air.
- the warmer air system is a repetitive, at least one, module of such air flow in the display case. This means that depending on the display case and its dimensions, there may be several warmer air flow systems or more than one channel.
- Air inlet and outlet also means that there may be more outlets and/or inlets, depending on a particular technical solution (within the scope of claims), and on design.
- an air filter in the inlet of the cooling chamber there is an air filter, or in the inlet of the beginning part of the warmer air channel, there is an air filter mounted.
- the advantage of the presented solution is that it enables to recover cold air released to the surroundings from the internal flow of cooler air, and next to introduce it to the external flow of warmer air.
- a side effect of sealing the closed flow of cooler air is removing the reason for lowering the ambient temperature, which decreases the energy consumption for heating the room.
- fig.l is a reference front view of the refrigerated display case
- fig.2 presents the axonometric front view of the refrigerated display case
- fig. 3 presents the schematic back view of the refrigerated display case
- fig.4 is a vertical cross- section of the refrigerated display case, in a bigger scale in respect to other figures, for the sake of better clarity.
- a typical refrigerated display case 1 has a shape inscribed in a cuboid, the five walls 2 of which constitute a thermally isolated casing.
- the biggest and the most visually exposed element of the display case 1 is the display chamber 3, open at the front and having food shelves 4 mounted inside.
- Under the display chamber 3 there is a cooling chamber 5 having in its front part a louver inlet of the cooler air and the surrounding air.
- the channel 9 consists of a vertical part 9a running between the back wall 3b of the display chamber 3 and the back wall 2b of the display case 1. In the back wall 3b there are outlets 10, through which cooler air is pushed from the vertical part 9a to the display chamber 3. At the top of the display case 1, the vertical part 9a becomes an end part 9b, running between the upper wall 3c of the display chamber 3 and the upper wall 2c of the display case 1.
- the channel of the cooler air 9 is terminated with a downward outlet 11 of cooler air, located at the end of the end part 9b.
- the warmer air channel 12 below the bottom wall 2a of the display case 1, at the front, there is an inlet 13 of the warmer air channel 12 that consists of the horizontal front part 12a, middle part 12b running outside the back wall 2b of the display case 1, and a horizontal end part 12c.
- the bed serves as the bottom.
- a warmer air fan 15 is mounted that sucks in the air through the inlet 13 and pushes it through the channel 12 to a downward outlet 14 located at the end part 12c outside the outlet 11 of the cooler air channel 9.
- a removable air filter is mounted, and in the inlet 13 of the front part 12a of the warmer air channel 12, a removable air filter is mounted.
Abstract
A display case (1) having a display chamber (3) open in the front and thermally separated from the surroundings by an air curtain (A) consisting of two air flows (B and C) with temperatures lower than ambient temperature. In the lower part of the display case (1) there is an inlet (13) of warmer air system to which a channel (12) is connected that runs along the walls (2a, 2b, 2c) of the display case (1) and is terminated with an outlet (14) located outside the cooled air outlet (11).
Description
Air curtain generator for refrigerated display case
The utility model comprises an air curtain generator for refrigerated display case, particularly for vertical display cases.
Refrigerated display cases are usually used in commercial establishments for storage and presentation purposes of food in temperatures lower than the ambient temperature. Such display cases consist of a display chamber with thermally isolated walls and an open front and separated from the surroundings by an curtain of air cooled to a temperature below the temperature of the surroundings.
From description of a utility model no. 61115 a refrigerated display case is known, with the display chamber surrounded by walls made of internal and external layers, with isolation between them. The bottom part of the display case comprises a ventilation set and an evaporator, from which along the back and the upper walls a channel runs with an outlet located outside the display chamber and directed downwards. The air, pushed by a fan and cooled in the evaporator is exhausted through an upper outlet, and flowing down along the display chamber creates an air curtain that separates the chamber from the surroundings, thus allowing to keep the temperature in the chamber lower than the ambient temperature.
In the description of claim in Poland no. 367690 (PCT/FR02/o2814), a vertical display case is included, the shape of which is inscribed in a cuboid. In the lower part of the display case there is a chamber with a cover in the front in the form of a louver wall. In the chamber behind the cover, a fan is mounted that sucks in the air from the outside. Behind the fan there is a heat exchanger that cools down the air that was suck in. The chamber has an outlet to a channel that runs within the back wall of the display case and has holes on different levels. The holes let the air inside
the display chamber. Next, the channel goes within the upper wall of the display chamber to outlets directed downwards.
The upper wall of the display case has an inlet for the surrounding air, wherefrom a channel runs to the downward outlet. Behind the outlet, a fan is mounted that sucks the air in and pushes it into the outlet, wherefrom it flows downwards as an external stream of the air curtain.
The solution according to the utility model consists in that in the lower part of the refrigerated display case there is an outlet of the warmer air system, to which a channel is connected, the starting part of which runs along the bottom wall of the display case, its middle part runs along the back wall of the display case, and its end ; part runs along the top wall of the display case, having at the end an outlet of warmer air. This outlet is located outside the outlet of cooler air. In the channel, at least one fan is mounted. Preferably, the warmer air system is a repetitive, at least one, module of such air flow in the display case. This means that depending on the display case and its dimensions, there may be several warmer air flow systems or more than one channel. Air inlet and outlet also means that there may be more outlets and/or inlets, depending on a particular technical solution (within the scope of claims), and on design.
Preferably, in the inlet of the cooling chamber there is an air filter, or in the inlet of the beginning part of the warmer air channel, there is an air filter mounted.
The advantage of the presented solution is that it enables to recover cold air released to the surroundings from the internal flow of cooler air, and next to introduce it to the external flow of warmer air.
As an effect of lowering the temperature of the external stream, heat exchange between the flowes decreases, and thus less energy is consumed for purposes of
cooling the air introduced to the internal stream. The tests conducted proved that energy consumption decreased by a few percent as a result of this.
A side effect of sealing the closed flow of cooler air is removing the reason for lowering the ambient temperature, which decreases the energy consumption for heating the room.
The device according to the utility model is presented in the drawings, where fig.l is a reference front view of the refrigerated display case, fig.2 presents the axonometric front view of the refrigerated display case, fig. 3 presents the schematic back view of the refrigerated display case, and fig.4 is a vertical cross- section of the refrigerated display case, in a bigger scale in respect to other figures, for the sake of better clarity.
A typical refrigerated display case 1 has a shape inscribed in a cuboid, the five walls 2 of which constitute a thermally isolated casing. The biggest and the most visually exposed element of the display case 1 is the display chamber 3, open at the front and having food shelves 4 mounted inside. Under the display chamber 3 there is a cooling chamber 5 having in its front part a louver inlet of the cooler air and the surrounding air.
In the cooling chamber 5 behind the inlet 6 there is a fan 7 that sucks in the air from the internal flow of cooler air B and, to complement its losses, from the external flow of warmer air C. The fan 7 pushes the air to the heat exchanger 8, where it is cooled to the desired temperature and directed to the channel 9 of cooler air. The channel 9 consists of a vertical part 9a running between the back wall 3b of the display chamber 3 and the back wall 2b of the display case 1. In the back wall 3b there are outlets 10, through which cooler air is pushed from the vertical part 9a to the display chamber 3. At the top of the display case 1, the vertical part 9a becomes an end part 9b, running between the upper wall 3c of the display chamber 3 and
the upper wall 2c of the display case 1. The channel of the cooler air 9 is terminated with a downward outlet 11 of cooler air, located at the end of the end part 9b.
Below the bottom wall 2a of the display case 1, at the front, there is an inlet 13 of the warmer air channel 12 that consists of the horizontal front part 12a, middle part 12b running outside the back wall 2b of the display case 1, and a horizontal end part 12c. In the front part 12a, the bed serves as the bottom. In the end part 12c, a warmer air fan 15 is mounted that sucks in the air through the inlet 13 and pushes it through the channel 12 to a downward outlet 14 located at the end part 12c outside the outlet 11 of the cooler air channel 9.
In the inlet 6 of the air cooling chamber 5, a removable air filter is mounted, and in the inlet 13 of the front part 12a of the warmer air channel 12, a removable air filter is mounted.
Claims
1. An air curtain generator for a refrigerated display case, having a display chamber open in the front with at least one fan and at at least one heat exchanger located in a separate chamber below the display chamber, the heat exchanger being connected to the cold air channel running at the back of the display chamber, with outlets into the chamber, and reaching the outlet located at the bottom of the upper part of the display case, and equipped with at least one warmer air fan connected to the cold air channel with an outlet located at the bottom of the upper wall of the display case, characterised by that in the lower part of the display case ■-■ (1) there is an inlet (13) of warmer air system to which a channel (12) is connected ' that runs along the bottom wall (2a) of the display case (1) as a front part (12a), up along the back wall (2b) of the display case (1) as a middle part (12b) and along the upper wall (2c) of the display case (1) as an end part (12c), terminated with a downwardly directed outlet (14), the channel (12) having at least one fan (15) mounted.
2. Generator according to claim 1 characterised by that the warmer air system is a repetitive, at least one, module of warmer air flow in the display case (1).
3. Generator according to claim 1 characterised by that the outlet (14) of warmer air is located outside the outlet (11) of cooler air.
4. Generator according to claim 1 characterised by that in the inlet (6) of the air cooling chamber (5), an air filter is located.
5. Generator according to claim 1 characterised by that in the inlet (13) of the front part (12a) of warmer air channel (12), an air filter is located. Legend
Refrigerated display case -1
Wall of the refrigerated display case -2
Bottom wall of the display case -2a
Back wall of the display case -2b
Upper wall of the display case -2c
Display chamber -3
Bottom wall of the display chamber -3a
Back wall of the display chamber -3b
Upper wall of the display chamber -3c
Shelf of the display chamber -4
Cooling chamber -5
Inlet of the air cooling chamber -6
Cooler air fan -7
Heat exchanger -8
Cooler air channel -9
Cooler air channel - vertical part -9a
Cooler air channel - end part (horizontal) -9b
Cooler air outlet to the display chamber -10
Cooler air channel outlet -11
Warmer air channel -12
Warmer air channel - front part (horizontal) -12a
Warmer air channel - middle part (vertical) -12b
Warmer air channel - end part (horizontal) -12c
Warmer air channel inlet -13
Warmer air channel outlet -14
Warmer air fan -15 Air curtain Cooler air flow Warmer air flow
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL11867509 | 2009-12-17 | ||
| PLW-118675 | 2009-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011074994A1 true WO2011074994A1 (en) | 2011-06-23 |
Family
ID=44246844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/PL2009/000108 WO2011074994A1 (en) | 2009-12-17 | 2009-12-17 | Air curtain generator for refrigerated display case |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2011074994A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202014100662U1 (en) | 2014-02-14 | 2014-02-24 | Aht Cooling Systems Gmbh | refrigerated |
| DE202014100664U1 (en) | 2014-02-14 | 2014-02-24 | Aht Cooling Systems Gmbh | refrigerated |
| WO2014029613A1 (en) * | 2012-08-22 | 2014-02-27 | Aht Cooling Systems Gmbh | Cooling device |
| US9220354B2 (en) | 2012-02-17 | 2015-12-29 | Hussmann Corporation | Merchandiser with airflow divider |
| US9456706B2 (en) | 2012-02-17 | 2016-10-04 | Hussmann Corporation | Merchandiser with airflow divider |
| US9560921B2 (en) | 2012-08-22 | 2017-02-07 | Aht Cooling Systems Gmbh | Cooling unit arrangement |
| GB2549719A (en) * | 2016-04-25 | 2017-11-01 | Wirth Res Ltd | An open refrigerated display case |
| US9901190B2 (en) | 2012-08-22 | 2018-02-27 | Aht Cooling Systems Gmbh | Cooling unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0768501A2 (en) * | 1995-10-11 | 1997-04-16 | Sanyo Electric Co., Ltd. | A defrosting device for a low temperature display case |
| PL367690A1 (en) | 2001-08-06 | 2005-03-07 | Bonnet Neve | Refrigerated display case, in particular vertical display case, with front refrigerated air curtain |
| EP1743552A1 (en) * | 2005-07-12 | 2007-01-17 | Hussmann Corporation | Ambient air curtain with floor air inlet |
-
2009
- 2009-12-17 WO PCT/PL2009/000108 patent/WO2011074994A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0768501A2 (en) * | 1995-10-11 | 1997-04-16 | Sanyo Electric Co., Ltd. | A defrosting device for a low temperature display case |
| PL367690A1 (en) | 2001-08-06 | 2005-03-07 | Bonnet Neve | Refrigerated display case, in particular vertical display case, with front refrigerated air curtain |
| EP1743552A1 (en) * | 2005-07-12 | 2007-01-17 | Hussmann Corporation | Ambient air curtain with floor air inlet |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9220354B2 (en) | 2012-02-17 | 2015-12-29 | Hussmann Corporation | Merchandiser with airflow divider |
| US10182667B2 (en) | 2012-02-17 | 2019-01-22 | Hussmann Corporation | Merchandiser with airflow divider |
| US9456706B2 (en) | 2012-02-17 | 2016-10-04 | Hussmann Corporation | Merchandiser with airflow divider |
| US9560921B2 (en) | 2012-08-22 | 2017-02-07 | Aht Cooling Systems Gmbh | Cooling unit arrangement |
| CN104540422A (en) * | 2012-08-22 | 2015-04-22 | 奥特冷机系统有限公司 | Cooling device |
| WO2014029613A1 (en) * | 2012-08-22 | 2014-02-27 | Aht Cooling Systems Gmbh | Cooling device |
| DE102012107713B4 (en) * | 2012-08-22 | 2018-02-15 | Aht Cooling Systems Gmbh | refrigerated |
| US9901190B2 (en) | 2012-08-22 | 2018-02-27 | Aht Cooling Systems Gmbh | Cooling unit |
| US9930974B2 (en) | 2012-08-22 | 2018-04-03 | Aht Cooling Systems Gmbh | Cooling device |
| DE202014100662U1 (en) | 2014-02-14 | 2014-02-24 | Aht Cooling Systems Gmbh | refrigerated |
| DE202014100664U1 (en) | 2014-02-14 | 2014-02-24 | Aht Cooling Systems Gmbh | refrigerated |
| US10420426B2 (en) | 2014-02-14 | 2019-09-24 | Aht Cooling Systems Gmbh | Refrigerated display case |
| GB2549719A (en) * | 2016-04-25 | 2017-11-01 | Wirth Res Ltd | An open refrigerated display case |
| GB2549719B (en) * | 2016-04-25 | 2018-09-26 | Wirth Res Limited | An open refrigerated display case |
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