CN1753634A - Refrigerated display merchandiser with improved air curtain - Google Patents
Refrigerated display merchandiser with improved air curtain Download PDFInfo
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- CN1753634A CN1753634A CN 200480005092 CN200480005092A CN1753634A CN 1753634 A CN1753634 A CN 1753634A CN 200480005092 CN200480005092 CN 200480005092 CN 200480005092 A CN200480005092 A CN 200480005092A CN 1753634 A CN1753634 A CN 1753634A
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- Prior art keywords
- air
- air curtain
- curtain
- exhaust velocity
- showcase
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- 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
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Freezers Or Refrigerated Showcases (AREA)
Abstract
A refrigerated merchandiser includes a display case defining a product display region having an open-front isolated from the ambient air of the store by means of a downwardly directed inner air curtain of relatively cold refrigerated air and a downwardly directed outer air curtain of relatively warmer air. The inner air curtain discharges through a first air outlet (34) at a first discharge velocity and the outer air curtain discharges through a second air outlet (70) at a second discharge velocity, the second discharge velocity being at least about 1.4 times greater than the first discharge velocity, and most advantageously, from about 1.4 to about 1.8 times greater than the first discharge velocity.
Description
The application also is a further part of the relevant patent application serial numbers 10/374,640 that awaits the reply of application on February 26th, 2003.
Technical field
Generally speaking, the present invention relates to be used in the refrigerated display merchandiser in supermarket, small-sized market, convenience store and other commercial undertaking, it is used to display and sale of refrigerated or freezing article for sale.Specifically, the present invention relates to the front open type refrigerated display merchandiser, wherein Han Leng air curtain passes through the front open type product display region of merchandiser downwards.
Background technology
Refrigerated display merchandiser with front open type display area also is called showcase usually, generally is used among supermarket, small-sized market, convenience store and other the commercial machine Zui, is used to display and sale of refrigerated or freezing article for sale.The open front nature of this showcase makes the consumer can get at product display region easily, so that select and mobile purchase, does not obtain the inconvenience that article bring and do not exist needs to open the cabinet door.Usually, the open front that cold air curtain passes through showcase at a relatively high speed downwards, thus between the store area of showcase front, form invisible line of demarcation in product display region.Air curtain not only help to remain on cold air in the product display region of showcase and the tank bracket of cooling display thus on the display article, and also played the effect that the surrounding air in product display region and the shop is kept apart to a certain extent.Really the surrounding air that enters open product display region has increased the refrigeration demand of the refrigerating system relevant with showcase, thereby has caused that undesirable energy consumption increases.And this surrounding air may cause that also the local temperature in the product display region raises, and it is enough to cause the article temperature that undesirable rising takes place, and this may cause adverse effect to article quality.
Can run into a problem during open front of the product display region by display merchandiser downwards in cold air curtain, promptly surrounding air is being carried secretly and is being entered into the cold air stream that forms air curtain.Relative at a high speed curtain air with between the common static surrounding air in showcase front, can have turbulent flow at the interface.Because this turbulent flow, some surrounding airs are brought in the air curtain under undesirable situation.In the prior art, develop multiple air curtain display cases and handled this entrainment problem.For example, have two adjacent side by side but the showcase of the independent cold air curtain that takes place is very common in the art.Typically, at United States Patent (USP) 4,633, disclosed in 677 outermost air curtain is higher slightly than innermost air curtain temperature like that as Maehara, so that the influence that the colder innermost air merit curtain of protection is not carried secretly by surrounding air.
Equally, the 3rd air curtain that it is well known in the art that the surrounding air of setting up higher temperature outside one or two cold air curtain can be used as a kind of minimizing and is carried secretly the means that enter cold air curtain from the surrounding air in shop.Abraham is at United States Patent (USP) 4,267, discloses in 706, sets up ambient air curtain outside innermost cold air curtain, and this ambient air outside curtain is directly parallel downwards and be close to inner cold air curtain.People such as Beckwith are at United States Patent (USP) 3,648, and 482 and 3,850, in 003, people such as MacMaster are at United States Patent (USP) 3,827, in 254 and Roberts at United States Patent (USP) 5, disclose respectively in outside in 345,778 and 5,357,767 and set up ambient air curtain cold air curtain.The air curtain of the product display region of close showcase is the coldest, and the air curtain of a little higher than innermost layer of center curtain temperature, but be starkly lower than outermost ambient air curtain.The effect of warm intermediate layer cold air curtain be slow down the innermost layer be subjected to invasion influence than cold air curtain from the hot gas of outermost ambient air curtain.The direction of outermost ambient air curtain substantially vertically downward, parallel and be close to the intermediate layer air curtain, slightly inwardly towards the intermediate layer air curtain, to stop the product display region that goes out showcase from the cold air loss of intermediate layer and innermost layer cold air curtain.Outermost ambient air curtain self spills near the showcase bottom, shop ideally, does not return in the inlet and be not introduced in air, turns back to evaporator room by this inlet cold air curtain.
Although compare with single air curtain, can very reduce the amount that surrounding air is invaded circulate cold air effectively usually, under the situation of refrigerated merchandiser, still there be a large amount of carrying secretly with two or three air curtains.Usually people recognize, in this multiple air curtain design, when the adjacent vacant air curtain has consistent relatively speed and makes that the shearing instability of interface is minimized between air curtain, carry secretly and are reduced.Therefore, in typical prior art merchandiser, the exhaust velocity separately of separate air curtains, promptly the exhaust velocity of each air stream when being discharged from its jet pipe that is positioned at the showcase top separately is designed to equally substantially, and two or three air curtains should appear in the there.Yet when air curtain flowed downward, outer air curtain tended to spread and spill in the shop, thereby had reduced speed, and because from taking out effect and from the increase of the air of refrigerator display case, the inner air curtain is easy to raising speed.Therefore, when air curtain blew downwards, the shearing instability of the interface of adjacent vacant air curtain increased, and caused the increase of carrying secretly higher, enter inner cold air curtain than malaria.Therefore, need a kind of improved air curtain system can solve the inner air curtain that enters cold air under the not high situation of cost entrainment problem.
Summary of the invention
Refrigerated merchandiser of the present invention comprises a showcase that defines product display region, and it has open front, and this opening is by than the downward inner air curtain of cold air with preferably separate than the downward outer air curtain of hot-air and the surrounding air in shop.According to the present invention, it is 1.4 times of inner air curtain exhaust velocity at least that the exhaust velocity of outer air curtain remains on, and preferably within the scope about 1.4 times to 2.4 times greater than the inner air curtain exhaust velocity.In a preferred embodiment, outer air curtain comprises surrounding air.
Description of drawings
Fig. 1 has represented the side view of a preferred embodiment of refrigerated merchandiser, and it has a front display case, and this showcase possesses a dual stream air curtain keeps apart the second environment outside first environment in the showcase and the showcase; With
Fig. 2 is a diagrammatic representation, shows that the cooling system needed load variations amount amount relevant with refrigerated merchandiser changes with the air curtain velocity rate.
The specific embodiment
Now referring to Fig. 1, this refrigerated merchandiser 10 comprises an outer cabinet 12 and an inner cabinet liner 20, and this inner cabinet liner 20 defines the product display region 30 of a front open type in its border.This outer cabinet has 14, one roofs 15 that extend forward from this rear wall of the upwardly extending rear wall in 13, one rear portions from this base 13 of a base, and a pair of sidewall 16 that extends vertically up to this roof 15 and extend forward from this rear wall 14 from this base 13.This inner cabinet liner 20 has a top board 28, backboard 26, a base plate 24 and an opposing sideplates 23, and they have together defined this front open type product display region 30.In this cabinet base 13, rear wall 14, roof 15 and the sidewall 16 each all insulate, and in conventional practice, so that make the inside of this cabinet 12, comprises this product display region 30, transmits thermal isolation mutually with the excessive heat that passes through it.
Perishable goods 80 in the sale can be displayed in and be arranged in the product display region 30 and be positioned on the above shelf 18 of the upper surface of base plate 24.This product display region 30 has an open front 25, so that the consumer not only can be seen, and can get in this product display zone 30 so that select and move it and wants the article 80 bought.Product display region 30 is freezed to reach desirable article temperature in the mode of routine, typically at-10oF to less than the about temperature between the 40oF, whether this is freezing or non-freezing deciding according to article and this article that wherein will sell.
This refrigerated merchandiser 10 further comprises a refrigerating chamber 40, usually be arranged in this display cabinet 12, the part between base 13 and the base plate 24, as shown in fig. 1, the refrigerating system parts wherein have been installed, be generally a tubular type coil evaporator 50 and an air blast 60, for example one or more fans.Yet, should be appreciated that particular type and the present invention that air blast adopts do not have relation and restricted.In conventional practice, the refrigerant cools of the pipe by this evaporimeter 40 is by the lip-deep air of this evaporator tube.Cold-producing medium normally provides by being positioned at other local remote refrigeration unit of shop.Yet, being understood that the present invention also can be used for independently refrigerated merchandiser, it comprises that they self refrigerating unit is used to provide cold-producing medium.
Between the backboard 26 of the rear wall 14 of this outer cabinet 12 and roof 15 and this internal layer show window liner plate 20 and top board 28, formed air circulation duct 32 respectively.Air blast 60 is used for air is guided through chamber 40 from air intake 42, so that pass evaporimeter 50, and thus by pipeline 32 to first air outlet slits 34.As previously described, when passing this evaporimeter 50, this circulating air has been cooled to the temperature of expection.From this first air outlet slit 34, this cold air is got back to air intake 42 by the open front 25 that is arranged on blades in first air outlet slit 34 and is being directed passing along first path product display region downwards.Therefore, cold air is recovered and constantly cycles through the energy that chamber 40 and pipeline 32 consume when the cooling cold air with conversion.In addition, by aforementioned refrigerating plant, pass this front open type product display region 30 from its top to the bottom and formed a cool air curtain 45 thus.For the cold air of direct guiding product display region 30 further is provided, a plurality of openings 24 can be set in backboard 26, by them, the cold air that part cycles through pipeline 32 can directly feed in the product display region 30.These cold airs also will be got back in the chamber 40 so that circulation by air intake 42 by the air blast guiding.
In the place ahead, top of cabinet 12, the outside of first air outlet slit 34 is provided with second air outlet slit 70.Compare with existing refrigerated merchandiser, the air that second air outlet slit 70 is used to guide heat along be positioned at the outside, first path the second the tunnel through roughly downward, be the air of cooling thereafter.By this way, formed the outer air curtain 65 of heat in the outside of colder inner air curtain 45, i.e. product display region 30 further away from each other.This hot outer air curtain 65 plays cushioning effect between colder inner air curtain 45 and shop surrounding environment.And when outer air curtain 65 arrived the bottom section of display cabinet 12, it outwards spilt in the shop rather than enters the interior air intake 42 of cabinet bottom front.Therefore, carry secretly and enter colder inner air curtain, and then reduce to by the Hot air quilt of 42 inlet chambers 40 that enter the mouth minimum, thereby reduced energy consumption in the cool cycles cold air.
First air outlet slit 34 and second air outlet slit 70 are positioned at the top front area of showcase 12, and wherein second air outlet slit 70 is positioned at the outside of first air outlet slit 34, just more are close to the front portion of display cabinet 12.Just as noted earlier, first air outlet slit 34 is connected with pipeline 32, and guiding is passed down through the open front of product display region 30 to form inner air curtain 45 by what air blast 60 drove than cold air.Second air outlet slit 70 and the air source of heat for example from the surrounding air in shop, form gas channel, and guiding by the second associated air blast 72 drive than hot-air downwards to form outer air curtain 65.
Referring now to Fig. 2, the longitudinal axis is represented the load reduction factor, and it is meant the freezing load with respect to the dual air curtain that the inner air curtain load is only arranged, and transverse axis is represented the velocity rate of outer air curtain and inner air curtain.Therefore, the load reduction factor is low more, and dual air curtain is effective more.As shown in Figure 2, the ratio of the exhaust velocity by making outside air curtain and the exhaust velocity of internal layer air curtain remains on about 1.4 within about 1.8 the scope, crosses in the air curtain reducing air communication, is maximized as the efficient of the dual parallel air curtain of barrier.Keep the velocity rate of air curtain within this scope, velocity gradient to be minimized, and therefore between the adjacent vacant air curtain along the interface between the adjacent vacant air curtain longitudinally shearing instability also minimize, cause less entering than the air of low velocity air curtain to carry secretly thus from the fair speed air curtain.So, according to using the present invention, the dual air curtain of the parallel airflow by one first and second fluid, and make extraneous air air-flow exhaust velocity remain on exhaust velocity that equals the inner air air-flow about 1.4 times to about 1.8 times level, can between two environment, keep a very effective isolation barrier.
Above-mentioned explanation is exemplary and also nonrestrictive.Can recognize that by above-mentioned explanation those skilled in the art many kinds of the present invention change and distortion, it also will drop within the spirit and scope of the invention.The preferred embodiments of the present invention are disclosed.Therefore, within the scope of the appended claims, the present invention can realize with the alternate manner that is different from specific describing mode.For the above reasons, determine that exact range of the present invention and intension should study following claim.
Claims (4)
1. refrigerated merchandiser, comprise a showcase that limits product display region, it has the viewing area of an open front, one that link to each other with described showcase and be used to guide the air of first air stream roughly down to pass that this viewing area, front portion first air outlet slit links to each other with described showcase with one along first path and be used to guide the air of second air stream roughly down to pass second air outlet slit of this viewing area, front portion along second path outside first air stream, it is characterized in that, described first air stream is discharged from from this first air outlet slit with first exhaust velocity, described second air stream is discharged from from this second air outlet slit with second exhaust velocity, and described second exhaust velocity is about 1.4 times of described first exhaust velocity at least.
2. refrigerated merchandiser as claimed in claim 1 is characterized in that, described second exhaust velocity arrives in about 1.8 the scope about 1.4 with the ratio of described first exhaust velocity.
3. refrigerated merchandiser as claimed in claim 1 is characterized in that, the described first air stream comprises colder air relatively, and the described second air stream comprises relatively warm air.
4. refrigerated merchandiser as claimed in claim 1 is characterized in that, the described second air stream comprises surrounding air.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37464003A | 2003-02-26 | 2003-02-26 | |
| US10/374,640 | 2003-02-26 | ||
| US10/752,134 | 2004-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1753634A true CN1753634A (en) | 2006-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480005092 Pending CN1753634A (en) | 2003-02-26 | 2004-02-18 | Refrigerated display merchandiser with improved air curtain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1753634A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102038387A (en) * | 2009-10-16 | 2011-05-04 | 开利公司 | Refrigerating display case |
| CN103216986A (en) * | 2012-01-20 | 2013-07-24 | 劲创股份有限公司 | Mixed type refrigerator |
| CN105189159A (en) * | 2013-05-03 | 2015-12-23 | 开利公司 | Refrigerated container with dual air curtain |
| CN105479632A (en) * | 2015-12-30 | 2016-04-13 | 重庆精榜高分子材料有限公司 | Press vulcanizer and vulcanizing method thereof |
| CN107028432A (en) * | 2016-02-03 | 2017-08-11 | 开利公司 | refrigeration display case system |
| CN115899937A (en) * | 2022-12-12 | 2023-04-04 | 江苏黑马森田机器人有限公司 | Internal circulation type one-way direct-blowing efficient air curtain door device |
-
2004
- 2004-02-18 CN CN 200480005092 patent/CN1753634A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102038387A (en) * | 2009-10-16 | 2011-05-04 | 开利公司 | Refrigerating display case |
| CN102038387B (en) * | 2009-10-16 | 2014-07-23 | 开利公司 | Refrigerating display case |
| CN103216986A (en) * | 2012-01-20 | 2013-07-24 | 劲创股份有限公司 | Mixed type refrigerator |
| CN103216986B (en) * | 2012-01-20 | 2015-07-22 | 劲创股份有限公司 | Mixed type refrigerator |
| CN105189159A (en) * | 2013-05-03 | 2015-12-23 | 开利公司 | Refrigerated container with dual air curtain |
| CN105189159B (en) * | 2013-05-03 | 2021-01-05 | 开利公司 | Refrigerated container with double air curtains |
| CN105479632A (en) * | 2015-12-30 | 2016-04-13 | 重庆精榜高分子材料有限公司 | Press vulcanizer and vulcanizing method thereof |
| CN105479632B (en) * | 2015-12-30 | 2019-02-12 | 重庆精榜高分子材料有限公司 | Vulcanizing press and its vulcanization process |
| CN107028432A (en) * | 2016-02-03 | 2017-08-11 | 开利公司 | refrigeration display case system |
| CN115899937A (en) * | 2022-12-12 | 2023-04-04 | 江苏黑马森田机器人有限公司 | Internal circulation type one-way direct-blowing efficient air curtain door device |
| CN115899937B (en) * | 2022-12-12 | 2023-10-20 | 江苏黑马森田机器人有限公司 | Internal circulation type unidirectional direct-blowing efficient air curtain door device |
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