JP2014037916A

JP2014037916A - Two-temperature type show case

Info

Publication number: JP2014037916A
Application number: JP2012180410A
Authority: JP
Inventors: Takeshi Fujimaru; 猛士藤丸
Original assignee: Fukushima Industries Corp
Current assignee: Fukushima Galilei Co Ltd
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2014-02-27
Anticipated expiration: 2032-08-16
Also published as: JP5993657B2

Abstract

PROBLEM TO BE SOLVED: To provide a two-temperature type show case that can prevent an article from changing in food texture and taste badly by solving the problem that the temperature of a bottom part of a high-temperature area becomes lower than the temperature of other regions, and also can prevent warmed air in the high-temperature area from being dissipated to outside the show case.SOLUTION: Cold air is supplied to a low-temperature area A1 of a two-temperature type show case through a first flow passage 4 and a first outlet 11 of an intermediate duct 9. Normal-temperature air is circulated through a second flow passage 5 and a second outlet 12 and an air curtain is formed before both areas A1, A2. A third flow passage 6 branching off from the second flow passage 5 is connected to an upper side of the first flow passage 4, and those flow passages 4, 6 are sectioned vertically with a damper part 41 of the intermediate duct 9. A heater 23 is arranged in the third flow passage 6 and warmed air is blown out from the third outlet 13 to a high-temperature area A2 to prevent a bottom part of the area from being at low temperature.

Description

本発明は、ショーケースの陳列室に低温エリアと、同エリアより高い温度状態に維持される高温エリアとが設けてある２温度式のショーケースに関する。 The present invention relates to a two-temperature showcase in which a display room of a showcase is provided with a low-temperature area and a high-temperature area maintained at a higher temperature than the area.

この種のショーケースは、例えば特許文献１に公知である。そこでは、陳列室を仕切板で上下に区分して、仕切板より下側の冷却ゾーン（低温エリア）と、仕切板より上側の加温ゾーン（高温エリア）とを設けている。加温ゾーンに配置される個々の棚板には面状ヒーターが設けてあり、棚板に載置された商品を加熱することができる。仕切板には、陳列室の背面の冷気通路を遮断するダンパーと、ダンパーで案内された冷気を冷却ゾーンへ向かって送給するためのダクトが設けてあり、冷気通路をダンパー遮断した状態では、冷気の全量を冷却ゾーンへ供給できる。仕切板の上面には、面状ヒーターからなる補助ヒーターが設けてあり、補助ヒーターで仕切板の真上の棚板を加熱して、棚板の温度が仕切板を通過する冷気で冷却されて低下するのを解消している。 This type of showcase is known, for example, from Patent Document 1. In this case, the display chamber is divided into upper and lower parts by a partition plate, and a cooling zone (low temperature area) below the partition plate and a heating zone (high temperature area) above the partition plate are provided. Each shelf plate arranged in the heating zone is provided with a planar heater, and the product placed on the shelf plate can be heated. The partition plate is provided with a damper for blocking the cool air passage at the back of the display room, and a duct for feeding the cool air guided by the damper toward the cooling zone. The entire amount of cold air can be supplied to the cooling zone. An auxiliary heater consisting of a sheet heater is provided on the upper surface of the partition plate, and the shelf plate is heated by the auxiliary heater so that the temperature of the shelf plate is cooled by the cold air passing through the partition plate. Eliminates the decline.

本発明に係る２温度式のショーケースでは、冷気循環用の冷気通路とは別に空気循環用の空気通路を設けて、低温エリアの前面に５℃前後の冷気エアーカーテンを形成し、さらに高温エリアの前面、および冷気のエアーカーテンの前側に２０℃の常温のエアーカーテンを形成するが、この種のショーケースは特許文献２に開示されている。そこでは、陳列室の後壁の上下中途部に、ダクト機能を備えたエリア区分板を配置して、陳列室の内部を下方の低温エリアと、上方の高温エリアとに区分している。低温エリアの背面には冷気循環ダクトが配置され、その内部に蒸発器と循環ファンを配置して、熱交換後の冷気をエリア区分板を介して低温エリアの内部へ供給できるようにしている。また、冷気循環ダクトの後には、空気循環用のダクトが配置してあり、その内部に循環ファンを配置して、高温エリアの前面から低温エリアの前面にわたって、エアーカーテンを形成できるようにしている。 In the two-temperature type showcase according to the present invention, an air passage for air circulation is provided separately from the cold air passage for cold air circulation, a cold air curtain of about 5 ° C. is formed in front of the low temperature area, and a high temperature area. An air curtain having a room temperature of 20 ° C. is formed on the front surface of the air curtain and on the front side of the cold air curtain. This type of showcase is disclosed in Patent Document 2. There, an area division plate having a duct function is arranged in the middle of the rear wall of the display room, and the inside of the display room is divided into a lower low temperature area and an upper high temperature area. A cold air circulation duct is arranged at the back of the low temperature area, and an evaporator and a circulation fan are arranged inside the low temperature area so that the cold air after heat exchange can be supplied to the inside of the low temperature area through the area partition plate. In addition, after the cool air circulation duct, an air circulation duct is arranged, and a circulation fan is arranged in the duct so that an air curtain can be formed from the front surface of the high temperature area to the front surface of the low temperature area. .

また、本発明に係る２温度式のショーケースでは、シーズヒーターで加温した空気を、中間ダクトの真上の棚板に向かって吹出すが、高温エリア内の空気を加温する熱源としてシーズヒーターを使用することは、特許文献３のショーケースに開示してある。なお、特許文献３のショーケースにおいては、冷気の一部を高温エリアの上端前部に設けた吹出口から吹出して、冷気のエアーカーテンを前後二重に形成している。また、区画棚の上面にはプレートヒーターを配置している。 In the two-temperature type showcase according to the present invention, the air heated by the sheathed heater is blown out toward the shelf plate directly above the intermediate duct, but the seeds are used as a heat source for heating the air in the high temperature area. The use of a heater is disclosed in the showcase of Patent Document 3. In the showcase of Patent Document 3, a part of the cool air is blown out from an air outlet provided at the front upper end of the high temperature area, and a cold air curtain is formed in a double front and rear direction. In addition, a plate heater is disposed on the upper surface of the partition shelf.

特開２００６−４６８８５号公報（段落番号００２１、図１、図２）JP 2006-46885 A (paragraph number 0021, FIGS. 1 and 2) 特開平５−１３３６７１号公報（段落番号００１０、図１）JP-A-5-133671 (paragraph number 0010, FIG. 1) 特開平７−１０３６４３号公報（段落番号００１６、図２）Japanese Patent Laid-Open No. 7-103643 (paragraph number 0016, FIG. 2)

特許文献１の２温度式のショーケースによれば、仕切板の真上の棚板の温度が、加温ゾーンに設けた他の棚板の温度より低下するのを解消できる。しかし、冷気通路に供給された冷気の全てを、仕切板のダクトを介して冷却ゾーンへ循環させるので、２温度式のショーケースとして使用するとき、加温ゾーンの前面の開口部分にエアーカーテンを形成することができない。そのため、加温ゾーンの内部の加温された空気が、ショーケースの外へ散逸するのを避けられず、熱エネルギーが無駄に消費され、ショーケースの消費電力量が多くなる。また、仕切板の上面に配置した面状ヒーターを熱源にして、仕切板の上面側の空気を介して棚板を加熱するので、熱の一部が仕切板の側へ伝導し、さらに面状ヒーターから棚板の下面に滞留する空気への熱伝導を効果的に行えないため、棚板を効率よく加熱できない。 According to the two-temperature type showcase of Patent Document 1, it is possible to eliminate the temperature of the shelf immediately above the partition plate from being lower than the temperature of the other shelf provided in the heating zone. However, since all of the cold air supplied to the cold air passage is circulated to the cooling zone through the duct of the partition plate, when used as a two-temperature type showcase, an air curtain is installed at the front opening of the heating zone. Cannot be formed. Therefore, it is inevitable that the heated air inside the heating zone is dissipated out of the showcase, so that heat energy is wasted and the power consumption of the showcase increases. In addition, since the shelf heater is heated via the air on the upper surface side of the partition plate using the planar heater disposed on the upper surface of the partition plate as a heat source, part of the heat is conducted to the partition plate side, Since heat conduction from the heater to the air staying on the bottom surface of the shelf cannot be effectively performed, the shelf cannot be efficiently heated.

さらに、特許文献１の２温度式のショーケースにおいては、冷却ゾーンの後壁に多数個の小穴を形成して、冷気通路に供給された冷気の一部を一群の小穴から吹出して、冷却ゾーンの冷却むらを防止できるようにしている。しかし、多くの場合には、冷却ゾーンの後壁の中央部分に位置する小穴に比べて、後壁の左右両端に位置する小穴から吹出される冷気の量は少なく、そのため、冷却ゾーンの内部を均等に冷却できない。とくに、左右方向の幅寸法が大きなショーケースにおいて、冷却ゾーンの左右両端の領域に収納された商品を適正に冷却できないことがある。 Furthermore, in the two-temperature type showcase of Patent Document 1, a plurality of small holes are formed in the rear wall of the cooling zone, and a part of the cold air supplied to the cold air passage is blown out from the group of small holes, It is possible to prevent uneven cooling. However, in many cases, the amount of cold air blown out from the small holes located at the left and right ends of the rear wall is smaller than the small holes located in the central part of the rear wall of the cooling zone, and therefore the inside of the cooling zone is It cannot cool evenly. In particular, in a showcase having a large width dimension in the left-right direction, products stored in the left and right end regions of the cooling zone may not be properly cooled.

特許文献２の２温度式のショーケースによれば、高温エリアの前面から低温エリアの前面にわたって常温のエアーカーテンを形成するので、高温エリアの内部の空気がショーケースの外へ漏れ出ることはない。しかし、エリア区分板の上面の棚板に載置した商品が、エリア区分板の内部を通過する冷気で冷却されるのを避けられない。そのため、高温エリアの底部分に陳列した商品の温度を適温（１５〜２０℃）に維持できず、商品の食感や食味が損なわれてしまう。 According to the two-temperature type showcase of Patent Document 2, since the air curtain at normal temperature is formed from the front surface of the high temperature area to the front surface of the low temperature area, the air inside the high temperature area does not leak out of the showcase. . However, it is inevitable that the product placed on the shelf on the upper surface of the area division plate is cooled by the cold air passing through the area division plate. Therefore, the temperature of the product displayed on the bottom portion of the high temperature area cannot be maintained at an appropriate temperature (15 to 20 ° C.), and the texture and taste of the product are impaired.

特許文献３の２温度式のショーケースにおいては、冷気のエアーカーテンを高温エリアおよび低温エリアの前面に前後二重に形成するので、高温エリアの内部の空気がショーケースの外へ漏れ出ることはない。しかし、吹出口から吹出された冷気の一部が、高温エリアに入り込むのを避けられず、高温エリアを加温するために赤外線ランプ、シーズヒーター、プレートヒーターなどを併用する必要があり、エネルギー消費が大きい点に問題がある。 In the two-temperature type showcase of Patent Document 3, a cold air curtain is formed in front and rear double on the front of the high temperature area and the low temperature area, so that the air inside the high temperature area does not leak out of the showcase. Absent. However, it is inevitable that a part of the cold air blown out from the air outlet enters the high temperature area, and it is necessary to use an infrared lamp, a sheathed heater, a plate heater, etc. in order to heat the high temperature area, and energy consumption There is a problem with the big point.

本発明の目的は、高温エリアの底部の温度が、高温エリアの他の部位の温度より低くなるのを解消して、商品の食感や食味が損なわれるのを防止でき、しかも高温エリアの内部の加温された空気がショーケースの外へ散逸するのを防止し、あるいは高温エリアを効果的に加温して、エネルギーの無駄な消費を解消できる２温度式のショーケースを提供することにある。
本発明の目的は、低温エリアおよび高温エリアの内部温度を均一化でき、とくに、左右方向の幅寸法が大きなショーケースであっても低温エリアおよび高温エリアに収納した商品を適正に冷却ないし常温の状態に維持することができる２温度式のショーケースを提供することにある。 The object of the present invention is to eliminate the fact that the temperature of the bottom of the high temperature area is lower than the temperature of other parts of the high temperature area, and to prevent the texture and taste of the product from being impaired, and the inside of the high temperature area To provide a two-temperature type showcase that can prevent the heated air from dissipating out of the showcase or effectively heat the high-temperature area to eliminate wasteful energy consumption is there.
The object of the present invention is to uniformize the internal temperature of the low-temperature area and the high-temperature area. In particular, even in a showcase having a large lateral width, products stored in the low-temperature area and the high-temperature area can be properly cooled or The object is to provide a two-temperature display case that can be maintained in a state.

本発明は、本体ケース１と陳列室２を区画する内ケース３とを有し、陳列室２の内部が中間ダクト９で下側の低温エリアＡ１と、上側の高温エリアＡ２とに区分してある２温度式のショーケースを適用対象とする。中間ダクト９の前部には、第１通路４を介して供給される冷気を、低温エリアＡ１の下端前部の吸込口１０へ向かって吹出す第１吹出口１１を設ける。高温エリアＡ２の上端前部には、循環ファン１５と蒸発器１６との間の第１通路４から分岐された第２通路５を介して供給される循環空気を、前記吸込口１０へ向かって吹出す第２吹出口１２を設ける。陳列室２に臨む内ケース３の後壁３ａには、両エリアＡ１・Ａ２に向かって冷気または加温空気を吹出す第３吹出口１３と、中間ダクト９を差込み装着するためのダンパー開口１４とを多段状に配置する。第２通路５の中途部から分岐されて、循環空気の一部を第３吹出口１３へ向かって送給する第３通路６の内部にヒーター２３を配置する。第３通路６は、第１通路４の上側に連続する状態で設けられて、中間ダクト９に設けたダンパー部４１のダンパー開口１４に対する装着位置の違いに応じて、前記両通路４・６の上下方向の区分位置が変更可能になっている。ヒーター２３で加熱された加温空気を第３吹出口１３から高温エリアＡ２へ向かって吹出して、高温エリアＡ２の底部が中間ダクト９を通過する冷気で冷却されるのを防止する。 The present invention has a main body case 1 and an inner case 3 that partitions the display chamber 2, and the interior of the display chamber 2 is divided into a lower low temperature area A1 and an upper high temperature area A2 by an intermediate duct 9. A certain two-temperature showcase is applied. A first air outlet 11 is provided at the front of the intermediate duct 9 to blow out the cold air supplied through the first passage 4 toward the suction port 10 at the front of the lower end of the low temperature area A1. Circulating air supplied through the second passage 5 branched from the first passage 4 between the circulation fan 15 and the evaporator 16 is directed to the suction port 10 at the upper front part of the high temperature area A2. The 2nd blower outlet 12 which blows off is provided. The rear wall 3a of the inner case 3 facing the display room 2 has a third outlet 13 for blowing cold air or warm air toward both areas A1 and A2, and a damper opening 14 for inserting and installing the intermediate duct 9. Are arranged in multiple stages. A heater 23 is arranged inside the third passage 6 that is branched from the middle portion of the second passage 5 and feeds part of the circulating air toward the third outlet 13. The third passage 6 is provided in a state of being continuous with the upper side of the first passage 4, and according to the mounting position of the damper portion 41 provided in the intermediate duct 9 with respect to the damper opening 14, The division position in the vertical direction can be changed. The heated air heated by the heater 23 is blown out from the third blower outlet 13 toward the high temperature area A2 to prevent the bottom of the high temperature area A2 from being cooled by the cold air passing through the intermediate duct 9.

第１通路４は、低温エリアＡ１の底部に沿う底通路４ａと、低温エリアＡ１の後部に沿う縦通路４ｂとで構成する。縦通路４ｂと第３通路６とは、内ケース３の後壁３ａと、同壁３ａと本体ケース１との間に配置した中間壁１７との間に区画する。図３に示すように、第１通路４の縦通路４ｂと第３通路６との左右両側に吹出チャンバー２７を区画する。第３通路６および縦通路４ｂと吹出チャンバー２７とは、これらを左右に区分する縦隔壁３１に開口した通口３２を介して連通している。吹出チャンバー２７の前面を覆う吹出壁３３に第１吹出穴２８の一群を開口する。縦通路４ｂと通口３２を介して吹出チャンバー２７に送給された冷気を、第１吹出穴２８から低温エリアＡ１へ吹出供給する。また、第３通路６と通口３２を介して吹出チャンバー２７に送給された加温空気を、第１吹出穴２８から高温エリアＡ２へ吹出供給する。 The first passage 4 includes a bottom passage 4a along the bottom of the low temperature area A1 and a vertical passage 4b along the rear of the low temperature area A1. The vertical passage 4 b and the third passage 6 are partitioned between the rear wall 3 a of the inner case 3 and an intermediate wall 17 disposed between the wall 3 a and the main body case 1. As shown in FIG. 3, blowout chambers 27 are defined on the left and right sides of the vertical passage 4 b and the third passage 6 of the first passage 4. The 3rd channel | path 6, the vertical channel | path 4b, and the blowing chamber 27 are connecting via the opening 32 opened to the vertical partition 31 which divides these into right and left. A group of first blowing holes 28 are opened in the blowing wall 33 that covers the front surface of the blowing chamber 27. The cold air fed to the blowout chamber 27 through the vertical passage 4b and the communication port 32 is blown out and supplied from the first blowout hole 28 to the low temperature area A1. Further, the heated air fed to the blowing chamber 27 through the third passage 6 and the communication port 32 is blown out and supplied from the first blowing hole 28 to the high temperature area A2.

図８、９および１０に示すように、吹出チャンバー２７は、各ダンパー開口１４に対応して配置した横隔壁２９で上下多段状に区画された小区画３０で構成する。第３通路６および縦通路４ｂと各小区画３０とは、これらを左右に区分する縦隔壁３１に開口した通口３２を介して連通する。吹出チャンバー２７の前面を覆う吹出壁３３に、各小区画３０ごとに第１吹出穴２８を開口する。縦通路４ｂと通口３２を介して各小区画３０に送給された冷気を、第１吹出穴２８から低温エリアＡ１へ吹出供給する。さらに、第３通路６と通口３２を介して各小区画３０に送給された加温空気を、第１吹出穴２８から高温エリアＡ２へ吹出供給する。 As shown in FIGS. 8, 9, and 10, the blowout chamber 27 is composed of small sections 30 that are partitioned into upper and lower multi-stages by a horizontal partition wall 29 arranged corresponding to each damper opening 14. The 3rd channel | path 6 and the vertical channel | path 4b, and each small division 30 are connected via the opening 32 opened to the vertical partition 31 which divides these into right and left. A first blowing hole 28 is opened for each small section 30 in the blowing wall 33 that covers the front surface of the blowing chamber 27. The cold air fed to each small section 30 through the vertical passage 4b and the communication port 32 is blown out and supplied from the first blow hole 28 to the low temperature area A1. Further, the heated air supplied to each of the small sections 30 through the third passage 6 and the communication port 32 is blown out and supplied from the first blow hole 28 to the high temperature area A2.

最下段のダンパー開口１４より下側の後壁３ａに、一群の第２吹出穴３６を開口する（図３参照）。第１通路４内に送給された熱交換後の冷気の一部を、第１吹出穴２８、および第２吹出穴３６から低温エリアＡ１へ吹出し供給する。 A group of second blowing holes 36 are opened in the rear wall 3a below the lowermost damper opening 14 (see FIG. 3). A part of the cold air after the heat exchange fed into the first passage 4 is blown out and supplied from the first blowing hole 28 and the second blowing hole 36 to the low temperature area A1.

第１通路４の底通路４ａに循環ファン１５を配置し、縦通路４ｂの下部に蒸発器１６を配置する。蒸発器１６の上端より上方の後壁３ａの後面にせき止壁３７（図２参照）を突出する。蒸発器１６を通過した熱交換後の冷気の一部をせき止壁３７でせき止めて、前記第２吹出穴３６へ向かって変向案内する。せき止壁３７より下方の第１通路４の下端部に、熱交換後の冷気の温度を検出する第１温度センサー３８を配置する。 A circulation fan 15 is disposed in the bottom passage 4a of the first passage 4, and an evaporator 16 is disposed in the lower portion of the vertical passage 4b. A retaining wall 37 (see FIG. 2) projects from the rear surface of the rear wall 3a above the upper end of the evaporator 16. A part of the cold air after the heat exchange that has passed through the evaporator 16 is blocked by a blocking wall 37, and is directed to the second blowing hole 36. A first temperature sensor 38 that detects the temperature of the cold air after heat exchange is disposed at the lower end of the first passage 4 below the retaining wall 37.

第２通路５の中途部に、同通路５を通過する循環空気の一部を第３通路６へ向かって流動案内する分岐構造を設ける。図１に示すように分岐構造は、中間壁１７の上部から後壁３ａへ向かって突出される下分岐壁２１と、下分岐壁２１より上方の後壁３ａから突出されて循環空気の一部をせき止める上分岐壁２２とで構成する。下分岐壁２１の前端にシーズヒーター２３を配置し、下分岐壁２１の下面の近傍に、シーズヒーター２３で加熱された加温空気の温度を検出する第２温度センサー２４を配置する。 A branch structure is provided in the middle of the second passage 5 to guide a part of the circulating air passing through the passage 5 toward the third passage 6. As shown in FIG. 1, the branch structure has a lower branch wall 21 protruding from the upper part of the intermediate wall 17 toward the rear wall 3a, and a part of the circulating air protruding from the rear wall 3a above the lower branch wall 21. And an upper branch wall 22 for damming up. A sheathed heater 23 is disposed at the front end of the lower branch wall 21, and a second temperature sensor 24 that detects the temperature of the heated air heated by the sheathed heater 23 is disposed near the lower surface of the lower branch wall 21.

本発明においては、陳列室２の内部が、中間ダクト９で下側の低温エリアＡ１と、上側の高温エリアＡ２とに区分してある２温度式のショーケースにおいて、冷気と常温空気を循環させて、低温エリアＡ１と高温エリアＡ２の温度状態を適正な状態に保持できるようにした。さらに、循環空気の一部を、第２通路５の中途部から分岐された第３通路６内へ導入し、その内部に配置したヒーター２３で加熱した加温空気を高温エリアＡ２に吹出して、高温エリアＡ２の底部が中間ダクト９を通過する冷気で冷却されるのを防止できるようにした。 In the present invention, cold air and room temperature air are circulated in a two-temperature type showcase in which the interior of the display chamber 2 is divided into a lower low temperature area A1 and an upper high temperature area A2 by an intermediate duct 9. Thus, the temperature state of the low temperature area A1 and the high temperature area A2 can be maintained in an appropriate state. Furthermore, a part of the circulating air is introduced into the third passage 6 branched from the middle portion of the second passage 5, and the heated air heated by the heater 23 disposed therein is blown out to the high temperature area A2, It was made possible to prevent the bottom of the high temperature area A2 from being cooled by the cold air passing through the intermediate duct 9.

従って、本発明の２温度式のショーケースによれば、高温エリアＡ２の底部の温度が、高温エリアＡ２の他の部位の温度より低くなるのを解消して、中間ダクト９の真上に位置する棚板８に陳列された商品の食感や食味が損なわれるのを防止できる。しかも、低温エリアＡ１の前面を覆う冷気のエアーカーテンとは別に、陳列室２の前面全体を覆うエアーカーテンを設けて、高温エリアＡ２内の加温空気や、低温エリアＡ１内の冷気がショーケースの外へ漏れ出るのを確実に防止できるようにした。そのうえで、第３通路６の内部に配置したヒーター２３で加熱した加温空気を、内ケース３の後壁３ａに設けた第３吹出口１３から高温エリアＡ２に吹出して、高温エリアＡ２の内部を高温状態に保持できるようにした。従って、従来の２温度式のショーケースに比べて、余分な熱源を用意する必要もなく高温エリアＡ２の内部を効果的に加温して、エネルギーの無駄な消費を解消できる。また、ダンパー部４１のダンパー開口１４に対する装着位置を変更して、前記両通路４・６の上下方向の区分位置を変更できるので、中間ダクト９の装着位置が上下に変更される場合でも、冷気および加温空気を低温エリアＡ１および高温エリアＡ２に的確に供給できる。 Therefore, according to the two-temperature type showcase of the present invention, the temperature at the bottom of the high temperature area A2 is eliminated from being lower than the temperature of other parts of the high temperature area A2, and is positioned directly above the intermediate duct 9. It is possible to prevent the texture and taste of the merchandise displayed on the shelf board 8 from being impaired. In addition to the cold air curtain that covers the front surface of the low temperature area A1, an air curtain that covers the entire front surface of the display room 2 is provided so that the warm air in the high temperature area A2 and the cold air in the low temperature area A1 are shown in the showcase. It was made possible to prevent leaking out of the door. Then, the heated air heated by the heater 23 disposed inside the third passage 6 is blown out from the third outlet 13 provided in the rear wall 3a of the inner case 3 to the high temperature area A2, and the inside of the high temperature area A2 is discharged. It was made possible to keep it in a high temperature state. Therefore, as compared with the conventional two-temperature type showcase, it is possible to effectively heat the inside of the high-temperature area A2 without preparing an extra heat source, thereby eliminating unnecessary energy consumption. In addition, since the vertical position of the passages 4 and 6 can be changed by changing the mounting position of the damper portion 41 with respect to the damper opening 14, even when the mounting position of the intermediate duct 9 is changed up and down, In addition, the heated air can be accurately supplied to the low temperature area A1 and the high temperature area A2.

第１通路４の縦通路４ｂと第３通路６との左右両側に吹出チャンバー２７を区画し、その前面に第１吹出穴２８の一群を開口したショーケースによれば、各エリアＡ１・Ａ２の左右両側の温度むらを解消して、各エリアＡ１・Ａ２の内部温度を均一化することができる。とくに、左右方向の幅寸法が大きなショーケースの場合には、低温エリアＡ１や高温エリアＡ２の左右側端の温度と中央部の温度とに差が生じやすいが、左右の第１吹出穴２８から冷気や加温空気を吹出すことにより、先のような温度むらを一掃することができる。従って、低温エリアＡ１および高温エリアＡ２に収納した商品を適正に冷却ないし常温の状態に維持することができる。 According to the showcase in which the blowout chamber 27 is defined on the left and right sides of the vertical passage 4b and the third passage 6 of the first passage 4 and a group of the first blowout holes 28 are opened on the front surface thereof, each of the areas A1 and A2 Uneven temperature on both the left and right sides can be eliminated, and the internal temperatures of the areas A1 and A2 can be made uniform. In particular, in the case of a showcase with a large width dimension in the left and right direction, a difference is likely to occur between the temperature at the left and right ends of the low temperature area A1 and the high temperature area A2 and the temperature at the center portion. By blowing out cold air or warm air, it is possible to eliminate the temperature unevenness as described above. Accordingly, the products stored in the low temperature area A1 and the high temperature area A2 can be appropriately cooled or maintained at room temperature.

吹出チャンバー２７の内部には、縦通路４ｂから通口３２を介して横向きに送給された冷気と、第３通路６から通口３２を介して横向きに送給された加温空気とが同時に存在する。しかし、比重が大きな冷気が吹出チャンバー２７の上部へ流動することはなく、同様に比重が小さな加温空気が吹出チャンバー２７の下部へ流動することもない。そのため、冷気と加温空気との隣接部分において、両者の一部が混在する状態で第１吹出穴２８から低温エリアＡ１または高温エリアＡ２に吹出されるであろう。しかし、冷気と加温空気の殆どは、対応する各エリアＡ１・Ａ２へ適正に吹出されるので、低温エリアＡ１の温度状態、および高温エリアＡ２の温度状態を好適化することができ、各エリアＡ１・Ａ２に収納した商品を適正に冷却ないし常温の状態に維持できる。 Inside the blowout chamber 27, cold air fed laterally from the vertical passage 4 b via the vent 32 and warm air fed laterally from the third passage 6 via the vent 32 are simultaneously provided. Exists. However, cold air having a large specific gravity does not flow to the upper part of the blowing chamber 27, and similarly, heated air having a small specific gravity does not flow to the lower part of the blowing chamber 27. Therefore, in the adjacent part of cold air and warm air, it will be blown out from the 1st blowing hole 28 to the low temperature area A1 or the high temperature area A2 in the state where both of them mixed. However, since most of the cool air and the warm air are appropriately blown out to the corresponding areas A1 and A2, the temperature state of the low temperature area A1 and the temperature state of the high temperature area A2 can be optimized. Goods stored in A1 and A2 can be properly cooled or maintained at room temperature.

吹出チャンバー２７を、横隔壁２９で上下多段状に区画された小区画３０で構成すると、ダンパー部４１で区分された冷気と加温空気とが、吹出チャンバー２７の内部で混じり合うのを避けることができる。詳しくは、中間ダクト９を任意のダンパー開口１４に装着した状態では、ダンパー部４１より下側の小区画３０に対して縦通路４ｂから冷気が送給され、ダンパー部４１より上側の小区画３０に対して第３通路６から加温空気が送給される。さらに、各小区画３０に送給された冷気および加温空気は、各小区画３０の前面に設けた第１吹出穴２８から、低温エリアＡ１あるいは高温エリアＡ２へと吹出される。このように、吹出チャンバー２７を多段状の小区画３０で構成すると、中間ダクト９の装着位置の如何にかかわらず、冷気と加温空気が吹出チャンバー２７の内部で混じり合うのを確実に防止できる。従って、低温エリアＡ１には冷気のみを、高温エリアＡ２には加温空気のみを供給して、各エリアＡ１・Ａ２の温度状態をさらに適正な状態に保持できる。 When the blowout chamber 27 is composed of the small compartments 30 that are divided into upper and lower multi-stages by the horizontal partition walls 29, it is avoided that the cold air and the heated air divided by the damper portion 41 are mixed in the blowout chamber 27. Can do. Specifically, in a state where the intermediate duct 9 is mounted in the arbitrary damper opening 14, cold air is supplied from the vertical passage 4 b to the small section 30 below the damper portion 41, and the small section 30 above the damper portion 41. On the other hand, warm air is supplied from the third passage 6. Further, the cool air and the warm air supplied to each small section 30 are blown out from the first blow hole 28 provided in the front surface of each small section 30 to the low temperature area A1 or the high temperature area A2. As described above, when the blowout chamber 27 is configured by the multistage small sections 30, it is possible to reliably prevent the cold air and the heated air from being mixed inside the blowout chamber 27 regardless of the mounting position of the intermediate duct 9. . Accordingly, only the cold air is supplied to the low temperature area A1 and only the warm air is supplied to the high temperature area A2, so that the temperature state of each of the areas A1 and A2 can be maintained in a more appropriate state.

最下段のダンパー開口１４より下側の後壁３ａに一群の第２吹出穴３６を開口すると、冷気が行き渡りにくい低温エリアＡ１の下後隅部分を、第２吹出穴３６から吹出される冷気と、第１吹出穴２８から吹出されて降下する冷気とで確実に冷却することができる。従って、低温エリアＡ１に商品が満杯状態で収納してある場合であっても、全ての商品をむらなく均等に冷却することができる。 When a group of second blowout holes 36 are opened in the rear wall 3a below the lowermost damper opening 14, the lower rear corner portion of the low temperature area A1 where cold air is difficult to spread is cooled with the cold air blown out from the second blowout hole 36. The cool air that is blown out from the first blow hole 28 and descends can be reliably cooled. Therefore, even if the products are stored in the low temperature area A1 in a full state, all the products can be evenly cooled without unevenness.

蒸発器１６の上端より上方の後壁３ａの後面にせき止壁３７を設け、熱交換後の冷気の一部をせき止壁３７でせき止めて、一群の第２吹出穴３６へ向かって変向案内すると、第２吹出穴３６から吹出される冷気の量を増加できる。従って、冷気が行き渡りにくい低温エリアＡ１の底部分や下後隅部分に多数個の商品が詰め込まれている状態であっても、それらの商品をさらに確実に冷却することができる。また、せき止壁３７より下方の第１通路４の下端部に第１温度センサー３８を配置すると、蒸発器１６を通過した直後の冷気の温度を検出して、冷却負荷の変動に適切に対応した状態で冷凍装置を制御することができる。 A damming wall 37 is provided on the rear surface of the rear wall 3a above the upper end of the evaporator 16, and a part of the cold air after heat exchange is dammed by the damming wall 37, and the direction is directed toward the group of second blowing holes 36. If guided, the amount of cool air blown out from the second blow-out hole 36 can be increased. Therefore, even in a state where a large number of products are packed in the bottom portion and the lower rear corner portion of the low temperature area A1 where cold air is difficult to spread, these products can be further reliably cooled. Further, when the first temperature sensor 38 is disposed at the lower end of the first passage 4 below the retaining wall 37, the temperature of the cold air immediately after passing through the evaporator 16 is detected, and the fluctuation of the cooling load is appropriately handled. In this state, the refrigeration apparatus can be controlled.

第２通路５の中途部に設けた分岐構造を、下分岐壁２１と上分岐壁２２とで構成すると、第２通路５に沿って流動する循環空気の一部を上分岐壁２２でせき止めて、第３通路６へ向かって確実に流動案内することができる。また、下分岐壁２１の前端に配置したシーズヒーター２３で、第３通路６へ導入された循環空気を直接加熱することにより、シーズヒーター２３の熱の殆どを循環空気に伝導できるので、加温空気を効率よく生成できる。下分岐壁２１の下面の近傍に第２温度センサー２４を配置すると、シーズヒーター２３で加熱された直後の加温空気の温度状態を的確に検知できる。従って、第２通路５から導入された循環空気の温度が大きくばらつくような場合でも、シーズヒーター２３の駆動状態を適切に制御して、高温エリアＡ２の内部の温度状態を常に適正な状態に保持できる。 When the branch structure provided in the middle portion of the second passage 5 is constituted by the lower branch wall 21 and the upper branch wall 22, a part of the circulating air flowing along the second passage 5 is blocked by the upper branch wall 22. Thus, it is possible to reliably guide the flow toward the third passage 6. In addition, since the sheathed heater 23 disposed at the front end of the lower branch wall 21 directly heats the circulating air introduced into the third passage 6, most of the heat of the sheathed heater 23 can be conducted to the circulating air. Air can be generated efficiently. If the 2nd temperature sensor 24 is arrange | positioned in the vicinity of the lower surface of the lower branch wall 21, the temperature state of the heating air immediately after heated with the sheathed heater 23 can be detected exactly. Accordingly, even when the temperature of the circulating air introduced from the second passage 5 varies greatly, the driving state of the sheathed heater 23 is appropriately controlled, and the temperature state inside the high temperature area A2 is always kept in an appropriate state. it can.

本発明に係る２温度式のショーケースにおける、中間ダクトの通路区分構造を示す縦断側面図である。It is a vertical side view which shows the passage division structure of an intermediate | middle duct in the two-temperature type showcase which concerns on this invention. ２温度式のショーケースの概略構造を示す縦断側面図である。It is a vertical side view which shows the schematic structure of a 2 temperature type showcase. ２温度式のショーケースの正面図である。It is a front view of a two-temperature type showcase. 陳列室内部の正面図である。It is a front view of a display room interior. 図３におけるＡ−Ａ線断面図である。It is the sectional view on the AA line in FIG. 冷気および加温空気の流動状態を示す概略斜視図である。It is a schematic perspective view which shows the flow state of cold air and warm air. 中間ダクトの保持構造を示す側面図である。It is a side view which shows the holding structure of an intermediate | middle duct. 吹出チャンバーの別の実施例を示す縦断側面図である。It is a vertical side view which shows another Example of a blowing chamber. 図８に係る吹出チャンバーの正面図である。It is a front view of the blowing chamber which concerns on FIG. 図８に係る吹出チャンバーの冷気および加温空気の流動状態を示す概略斜視図である。It is a schematic perspective view which shows the flow state of the cold air and warm air of the blowing chamber which concerns on FIG.

（実施例）図１ないし図７は、本発明に係る２温度式のショーケースの実施例を示す。この実施例における前後、左右、上下とは、図２および図３に示す交差矢印と、各矢印の近傍に表記した前後、左右、上下の表示に従う。図２においてショーケースは、断熱材で内張りされた本体ケース１と、本体ケース１の内側に配置されて陳列室２を区画する内ケース３と、両ケース１・３の間に区画される第１通路（冷気通路）４および第２通路５と、第２通路５の中途部から分岐される第３通路６とを備えている。符号７は棚ブラケット、８は板ガラス製の棚板である。 (Example) FIG. 1 thru | or FIG. 7 shows the Example of the 2 temperature type showcase based on this invention. In this embodiment, front and rear, left and right, and up and down follow the cross arrows shown in FIG. 2 and FIG. In FIG. 2, the showcase includes a main body case 1 lined with a heat insulating material, an inner case 3 that is disposed inside the main body case 1 and divides the display chamber 2, and is divided between the cases 1 and 3. 1 passage (cold air passage) 4 and 2nd passage 5, and 3rd passage 6 branched from the middle part of 2nd passage 5 are provided. Reference numeral 7 is a shelf bracket, and 8 is a shelf plate made of plate glass.

陳列室２の内部は、内ケース３の上下中途部に配置した中間ダクト９で、中間ダクト９より下側の低温エリアＡ１と、中間ダクト９より上側の高温エリアＡ２とに区分してある。なお、低温エリアＡ１と高温エリアＡ２の上下高さは、後述するダンパー開口１４に対する中間ダクト９の上下方向の装着位置の違いで大小に変更することができる。 The interior of the display chamber 2 is divided into a low temperature area A1 below the intermediate duct 9 and a high temperature area A2 above the intermediate duct 9 by an intermediate duct 9 disposed in the middle of the upper and lower sides of the inner case 3. The vertical height of the low temperature area A1 and the high temperature area A2 can be changed depending on the mounting position of the intermediate duct 9 in the vertical direction with respect to the damper opening 14 described later.

中間ダクト９の前部には、第１通路４を介して供給される冷気を、低温エリアＡ１の下端前部の吸込口１０へ向かって吹出す第１吹出口１１が設けてある。また、高温エリアＡ２の上端前部には、第２通路５を介して供給される循環空気を、吸込口１０へ向かって吹出す第２吹出口１２が設けてある。さらに、陳列室２に臨む内ケース３の後壁３ａの中央部分には、両エリアＡ１・Ａ２に向かって冷気または加温空気を吹出す第３吹出口１３と、中間ダクト９を差込み装着するためのダンパー開口１４とが交互に位置する状態で多段状に配置してある（図３参照）。この実施例では、第３吹出口１３の左右方向の直線列を上下９個所に、ダンパー開口１４を上下８個所に設けるようにした。また、第３吹出口１３は横長長円状に形成して、第１通路４および第３通路６に臨んで固定した帯状の板壁６０の左右５個所に開口した。板壁６０は、後述する縦隔壁３１の前端の締結壁にビスで締結してある。 At the front part of the intermediate duct 9, there is provided a first air outlet 11 that blows out the cold air supplied through the first passage 4 toward the suction port 10 at the lower end front part of the low temperature area A <b> 1. Moreover, the 2nd blower outlet 12 which blows off the circulating air supplied via the 2nd channel | path 5 toward the suction inlet 10 is provided in the upper end front part of high temperature area A2. Further, a third outlet 13 for blowing cold air or warm air toward both areas A1 and A2 and an intermediate duct 9 are inserted and attached to the central portion of the rear wall 3a of the inner case 3 facing the display room 2. For this reason, the damper openings 14 are alternately arranged in a multistage manner (see FIG. 3). In this embodiment, the left and right straight lines of the third air outlets 13 are provided at nine places in the top and bottom, and the damper openings 14 are provided at eight places in the top and bottom. Further, the third air outlet 13 was formed in a horizontally long oval shape and opened at five locations on the left and right sides of the strip-shaped plate wall 60 fixed facing the first passage 4 and the third passage 6. The plate wall 60 is fastened with screws to the fastening wall at the front end of the vertical partition wall 31 described later.

ダンパー開口１４は、その後側に配置したドア１９で塞がれており、図１に示すように、ドア１９の上端左右は支軸を兼ねるビス６１で揺動開閉可能に支持してある。ドア１９は自重で閉じ位置へ復帰できる。各ドア１９の下部には接合壁１９ａが斜めに折曲げてあり、この接合壁１９ａを板壁６０の上端に配置した傾斜するゴムマグネット（磁石）２０で吸着することにより、各ドア１９を閉じ姿勢に保持している。 The damper opening 14 is closed by a door 19 disposed on the rear side, and as shown in FIG. 1, the upper and left ends of the door 19 are supported by a screw 61 that also serves as a support shaft so as to be swingable and openable. The door 19 can return to the closed position by its own weight. A joint wall 19a is obliquely bent at the lower part of each door 19, and the door 19 is closed by adsorbing the joint wall 19a with an inclined rubber magnet (magnet) 20 disposed at the upper end of the plate wall 60. Hold on.

図２に示すように、第１通路４は、低温エリアＡ１の下部から後部にわたって形成した底通路４ａと、底通路４ａの後部から上向きに立ち上がる縦通路４ｂとで構成されており、その底通路４ａに循環ファン１５が配置され、縦通路４ｂの下部に蒸発器１６が配置してある。縦通路４ｂは、内ケース３の後壁３ａと、同壁３ａの後方に配置した中間壁１７との間に区画してある。図１に示すように中間壁１７の前面には、シール壁１８が先の後壁３ａと平行に設けてある。第１通路４を介して送給された冷気を、第１吹出口１１から吸込口１０へ向かって吹出すことにより、低温エリアＡ１の前面に冷気のエアーカーテンが形成される。 As shown in FIG. 2, the first passage 4 is composed of a bottom passage 4a formed from the lower portion to the rear portion of the low temperature area A1, and a vertical passage 4b rising upward from the rear portion of the bottom passage 4a. A circulation fan 15 is disposed at 4a, and an evaporator 16 is disposed below the vertical passage 4b. The vertical passage 4b is partitioned between the rear wall 3a of the inner case 3 and the intermediate wall 17 disposed behind the wall 3a. As shown in FIG. 1, a seal wall 18 is provided in front of the intermediate wall 17 in parallel with the rear wall 3a. By blowing out the cold air fed through the first passage 4 from the first air outlet 11 toward the suction port 10, a cold air curtain is formed on the front surface of the low temperature area A1.

第２通路５は、循環ファン１５と蒸発器１６との間の第１通路４から分岐されており、本体ケース１の後および上部に沿って形成されて、循環ファン１５から送給される熱交換前の循環空気の一部を第２吹出口１２へ向かって送給案内する。第２通路５を介して送給された循環空気を、第２吹出口１２から吸込口１０へ向かって吹出すことにより、高温エリアＡ２の前面と、上記の冷気のエアーカーテンの前面とを覆う状態で常温のエアーカーテンが形成される。 The second passage 5 is branched from the first passage 4 between the circulation fan 15 and the evaporator 16, is formed along the back and top of the main body case 1, and is supplied from the circulation fan 15. A part of the circulating air before exchange is guided to the second outlet 12. By circulating the circulating air fed through the second passage 5 from the second air outlet 12 toward the air inlet 10, the front surface of the high temperature area A2 and the front surface of the cold air curtain are covered. A room temperature air curtain is formed in the state.

第３通路６は、第２通路５の中途部に設けた分岐構造を介して分岐されて、第２通路５を通過する循環空気の一部を第３吹出口１３へ向かって送給案内する。第３通路６は、第１通路４の縦通路４ｂと同様に、内ケース３の後壁３ａと、同壁３ａの後方に配置した中間壁１７との間に区画されて、第１通路４の上側に連続しており、これら両通路４・６は、ダンパー開口１４に装着した中間ダクト９のダンパー部４１で上下に区分される。 The third passage 6 is branched through a branch structure provided in the middle of the second passage 5 and guides a part of the circulating air that passes through the second passage 5 toward the third outlet 13. . Similar to the vertical passage 4b of the first passage 4, the third passage 6 is partitioned between the rear wall 3a of the inner case 3 and an intermediate wall 17 disposed behind the wall 3a. These passages 4 and 6 are divided into upper and lower portions by a damper portion 41 of the intermediate duct 9 attached to the damper opening 14.

つまり、中間ダクト９の上下のダンパー開口１４に対する装着位置にかかわらず、ダンパー部４１より下側の通路部分が縦通路４ｂとなり、ダンパー部４１より上側の通路部分が第３通路６となる。また、ダンパー部４１より下側の第３吹出口１３から、冷気が低温エリアＡ１へ向かって吹出され、ダンパー部４１より上側の第３吹出口１３から、加温空気または循環空気が高温エリアＡ２へ向かって吹出される。この実施例では、図２に示すように中間ダクト９のダンパー部４１が、上から２番目のダンパー開口１４に差込み装着してある状態を示している。 That is, regardless of the mounting position of the intermediate duct 9 with respect to the upper and lower damper openings 14, the passage portion below the damper portion 41 becomes the vertical passage 4 b, and the passage portion above the damper portion 41 becomes the third passage 6. Further, the cool air is blown out from the third blower outlet 13 below the damper part 41 toward the low temperature area A1, and the warm air or the circulating air is sent from the third blower outlet 13 above the damper part 41 to the high temperature area A2. It is blown out toward. In this embodiment, as shown in FIG. 2, the damper portion 41 of the intermediate duct 9 is inserted into the second damper opening 14 from the top and attached.

図１において分岐構造は、中間壁１７の上部から後壁３ａへ向かって突出される下分岐壁２１と、下分岐壁２１より上方の後壁３ａから後向きに突出されて循環空気の一部をせき止める上分岐壁２２とで構成する。分岐構造を介して第３通路６内へ導入された循環空気を加熱するために、下分岐壁２１の前端にシーズヒーター（ヒーター）２３を配置し、下分岐壁２１の下面の近傍に、シーズヒーター２３で加熱された加温空気の温度を検出する第２温度センサー２４を配置している。シーズヒーター２３は、下分岐壁２１に固定した複数個のホルダー２５で支持されて、同ヒーター２３の近傍を流動する循環空気を直接加熱する。 1, the branch structure has a lower branch wall 21 projecting from the upper part of the intermediate wall 17 toward the rear wall 3a, and a rear projecting rearward from the rear wall 3a above the lower branch wall 21 to partly circulate the air. It is comprised with the upper branch wall 22 to stop. In order to heat the circulating air introduced into the third passage 6 through the branch structure, a sheathed heater (heater) 23 is disposed at the front end of the lower branch wall 21, and the sheaths are disposed near the lower surface of the lower branch wall 21. A second temperature sensor 24 that detects the temperature of the heated air heated by the heater 23 is disposed. The sheathed heater 23 is supported by a plurality of holders 25 fixed to the lower branch wall 21 and directly heats the circulating air flowing in the vicinity of the heater 23.

上記のように、シーズヒーター２３で加熱された加温空気を第３吹出口１３から高温エリアＡ２へ向かって吹出すことにより、高温エリアＡ２の底部、あるいは中間ダクト９の真上に位置する棚板８を加温空気で加熱することができる。従って、高温エリアＡ２の底部、あるいは中間ダクト９の真上に位置する棚板８が、中間ダクト９を通過する冷気で冷却されるのを防止でき、同時に棚板８の下面に結露が生じるのを防止できる。なお、シーズヒーター２３は、第２温度センサー２４を通過する空気の温度が２０℃未満のとき１００％通電され、第２温度センサー２４を通過する空気の温度が２０℃以上になると０％通電状態となるように制御される。 As described above, the shelf positioned at the bottom of the high temperature area A2 or just above the intermediate duct 9 by blowing the heated air heated by the sheathed heater 23 from the third outlet 13 toward the high temperature area A2. The plate 8 can be heated with warm air. Therefore, it is possible to prevent the shelf plate 8 positioned at the bottom of the high temperature area A2 or directly above the intermediate duct 9 from being cooled by the cold air passing through the intermediate duct 9, and at the same time, condensation occurs on the lower surface of the shelf plate 8. Can be prevented. The sheathed heater 23 is energized 100% when the temperature of the air passing through the second temperature sensor 24 is less than 20 ° C, and is 0% energized when the temperature of the air passing through the second temperature sensor 24 is 20 ° C or higher. It is controlled to become.

以上のように構成したショーケースは、第１通路４を介して送給される冷気を、第１吹出口１１と、図６に示すように、内ケース３の後壁３ａに設けた第３吹出口１３から吹出して、低温エリアＡ１の内部を低い温度状態（例えば５℃）に保持することができる。また、循環空気を第２吹出口１２から吹出し、さらに加温空気または循環空気を第３吹出口１３から吹出して、高温エリアＡ２の内部を常温状態（例えば２０℃）に保持することができる。しかし、第３吹出口１３から吹出される冷気や加温空気は、陳列室２の左右側端に行き渡りにくく、そのため、低温エリアＡ１や高温エリアＡ２の左右側端の温度と中央部の温度とに差が生じやすい。低温エリアＡ１では、左右側端の温度が左右中央部の温度より高くなり、高温エリアＡ２では、左右側端の温度が左右中央部の温度より低くなり、とくに、左右方向の幅寸法が大きなショーケースの場合に、その傾向が顕著に表れる。 The showcase configured as described above has a third structure in which the cold air fed through the first passage 4 is provided in the first air outlet 11 and the rear wall 3a of the inner case 3 as shown in FIG. It blows out from the blower outlet 13, and can maintain the inside of the low temperature area A1 in a low temperature state (for example, 5 degreeC). Moreover, circulating air can be blown out from the 2nd blower outlet 12, and warming air or circulating air can be blown out from the 3rd blower outlet 13, and the inside of the high temperature area A2 can be hold | maintained to normal temperature state (for example, 20 degreeC). However, the cold air and the warm air blown from the third outlet 13 do not easily reach the left and right ends of the display chamber 2, and therefore, the temperature of the left and right ends of the low temperature area A1 and the high temperature area A2 and the temperature of the central portion Differences are likely to occur. In the low temperature area A1, the temperature at the left and right side edges is higher than the temperature at the left and right center part, and in the high temperature area A2, the temperature at the left and right side edges is lower than the temperature at the left and right center part. In the case of a case, the tendency appears notably.

上記のような、各温度エリアＡ１・Ａ２における温度むらを解消するために、図３および図４に示すように第１通路４の縦通路４ｂと第３通路６との左右両側に吹出チャンバー２７・２７を区画している。さらに、吹出チャンバー２７に送給された冷気あるいは加温空気を、同チャンバー２７の前面の両側に設けた一群の第１吹出穴２８から吹出すようにしている。 In order to eliminate the temperature unevenness in each of the temperature areas A1 and A2 as described above, the blowout chambers 27 are provided on both the left and right sides of the vertical passage 4b and the third passage 6 of the first passage 4 as shown in FIGS.・ 27 is divided. Further, the cool air or the warm air supplied to the blowout chamber 27 is blown out from a group of first blowout holes 28 provided on both sides of the front surface of the chamber 27.

図３に示すように、最下段のダンパー開口１４より下側の後壁３ａには、一群の第２吹出穴３６が開口してある。この第２吹出穴３６へ向かって、熱交換後の冷気を充分に送給するために、蒸発器１６の上端より上方の後壁３ａの後面に、せき止壁３７が中間壁１７へ向かって突出してある（図２参照）。せき止壁３７で変向案内された冷気は、一群の第２吹出穴３６から吹出供給される。 As shown in FIG. 3, a group of second blowing holes 36 are opened in the rear wall 3 a below the lowermost damper opening 14. In order to sufficiently supply the cold air after heat exchange toward the second blowing hole 36, a damming wall 37 is directed toward the intermediate wall 17 on the rear surface of the rear wall 3 a above the upper end of the evaporator 16. It protrudes (see FIG. 2). The cold air that has been guided to guide by the damming walls 37 is blown out from a group of second blowing holes 36.

図３に示すように、第２吹出穴３６は左右方向に直線列を構成する状態で後壁３ａの上下５個所に形成してある。このように、最下段のダンパー開口１４より下側に多数個の第２吹出穴３６を開口することにより、第１吹出口１１および第３吹出口１３と、第１吹出穴２８から冷気を吹出すことに加えて、第２吹出穴３６からも冷気を吹出して低温エリアＡ１の全体をむらなく５℃に保持することができる。せき止壁３７より下方の第１通路４の下端部には、熱交換後の冷気の温度を検出する第１温度センサー３８が配置してある。 As shown in FIG. 3, the 2nd blowing hole 36 is formed in the upper and lower 5 places of the rear wall 3a in the state which comprises a straight line in the left-right direction. In this way, by opening a large number of the second blowout holes 36 below the lowermost damper opening 14, cold air is blown from the first blowout port 11 and the third blowout port 13 and the first blowout hole 28. In addition to taking out, cold air can be blown out also from the second blowout hole 36 to keep the entire low temperature area A1 at 5 ° C. evenly. A first temperature sensor 38 that detects the temperature of the cold air after heat exchange is disposed at the lower end of the first passage 4 below the retaining wall 37.

図１に示すように、中間ダクト９は、厚板状に形成される中空のダクト本体４０を備えており、ダクト本体４０の前部下面に第１吹出口１１が開口してある。また、ダクト本体４０の後端にダンパー部４１が一体に形成され、その下面に冷気入口４２が下向きに開口してある。第１吹出口１１には、冷気の吹出し方向を吸込口１０へ向かって指向させる格子状の整流枠４３が配置してあり、ダンパー部４１の後端には、シール壁１８との接合隙間を塞ぐシール体４４が固定してある（図１参照）。ダクト本体４０の左右幅は、棚板８の左右幅より僅かに小さく設定してあり、ダンパー部４１の左右幅はダンパー開口１４の左右幅より僅かに小さく設定してある。 As shown in FIG. 1, the intermediate duct 9 includes a hollow duct body 40 formed in a thick plate shape, and the first air outlet 11 is opened on the front lower surface of the duct body 40. Further, a damper portion 41 is integrally formed at the rear end of the duct body 40, and a cold air inlet 42 is opened downward on the lower surface thereof. The first air outlet 11 is provided with a grid-like rectifying frame 43 that directs the air blowing direction toward the air inlet 10, and a joint gap with the seal wall 18 is formed at the rear end of the damper portion 41. The sealing body 44 to be closed is fixed (see FIG. 1). The left-right width of the duct body 40 is set slightly smaller than the left-right width of the shelf board 8, and the left-right width of the damper portion 41 is set slightly smaller than the left-right width of the damper opening 14.

ダンパー部４１をダンパー開口１４に差込み装着した状態において、中間ダクト９を安定した状態で支持するために、ダクト本体４０の左右側壁と棚ブラケット７との間に、互いに係合する連結構造を設けている。図７に示すように連結構造は、ダクト本体４０の左右側壁に固定される雄連結体４５と、棚ブラケット７に固定される横臥Ｖ字状の雌連結体４６とで構成してある。雄連結体４５は、ベース部４７からダイヤ形の係合片４８を後向きに突出したプラスチック成形品からなる。また、雌連結体４６は、ベース部４９からＶ字状の弾性腕５０を前向きに突出し、その先端に先の係合片４８を挟持する挟持片５１を設けたプラスチック成形品からなる。 In order to support the intermediate duct 9 in a stable state with the damper portion 41 inserted into the damper opening 14, a coupling structure that engages with each other is provided between the left and right side walls of the duct body 40 and the shelf bracket 7. ing. As shown in FIG. 7, the connection structure includes a male connection body 45 fixed to the left and right side walls of the duct body 40 and a horizontal V-shaped female connection body 46 fixed to the shelf bracket 7. The male connector 45 is formed of a plastic molded product in which a diamond-shaped engagement piece 48 protrudes rearward from the base portion 47. The female coupling body 46 is formed of a plastic molded product in which a V-shaped elastic arm 50 projects forward from the base portion 49 and a sandwiching piece 51 for sandwiching the previous engagement piece 48 is provided at the tip thereof.

中間ダクト９のダンパー部４１の後端を、ドア１９に押付けながらダンパー開口１４に差込むと、図１に示すように、ドア１９が開放揺動されてダンパー部４１と冷気入口４２を第１通路４内に位置させることができる。また、ダンパー部４１は、第１通路４の縦通路４ｂと第３通路６を上下に区分しており、この状態のシール体４４はシール壁１８に接当している。従って、第１通路４に送給された熱交換後の冷気は中間ダクト９内へ導入され、第１吹出口１１から吸込口１０へ向かって吹出されて冷気のエアーカーテンを形成し、低温エリアＡ１に陳列された商品を冷却できる。 When the rear end of the damper portion 41 of the intermediate duct 9 is inserted into the damper opening 14 while being pressed against the door 19, as shown in FIG. 1, the door 19 is opened and swung to bring the damper portion 41 and the cold air inlet 42 into the first position. It can be located in the passage 4. The damper portion 41 divides the vertical passage 4 b and the third passage 6 of the first passage 4 into upper and lower portions, and the seal body 44 in this state is in contact with the seal wall 18. Accordingly, the cold air after heat exchange fed to the first passage 4 is introduced into the intermediate duct 9 and blown out from the first air outlet 11 toward the suction port 10 to form an air curtain for the cold air. Products displayed in A1 can be cooled.

ダンパー部４１をダンパー開口１４に差込み装着した状態では、図１に示すように、ダクト本体４０の後端が後壁３ａで支持され、後端のシール体４４がシール壁１８で受止められる。さらに、雄連結体４５の係合片４８が、雌連結体４６の挟持片５１で上下に挟持される。従って、ダンパー開口１４の装着した状態の中間ダクト９を安定した状態で支持することができ、さらにダンパー部４１がダンパー開口１４から分離するのを阻止できる。この状態のドア１９は、接合壁１９ａの折曲げ縁がダンパー部４１の上壁で受止められている。 In a state in which the damper portion 41 is inserted into the damper opening 14 and attached, the rear end of the duct body 40 is supported by the rear wall 3a, and the seal body 44 at the rear end is received by the seal wall 18. Further, the engaging piece 48 of the male connector 45 is sandwiched up and down by the sandwiching piece 51 of the female connector 46. Therefore, the intermediate duct 9 with the damper opening 14 attached can be supported in a stable state, and the damper portion 41 can be prevented from being separated from the damper opening 14. In the door 19 in this state, the bent edge of the joining wall 19 a is received by the upper wall of the damper portion 41.

以上のように構成したショーケースによれば、図６に示すように、縦通路４ｂを介して供給された冷気を第１吹出口１１と第３吹出口１３から吹出し、同時に縦通路４ｂと通口３２を介して吹出チャンバー２７に送給された冷気を、左右の第１吹出穴２８から低温エリアＡ１へ吹出供給できる。さらに、最下段のダンパー開口１４より下側のエリアにおいては、第２吹出穴３６から冷気を吹出して、低温エリアＡ１の全体を低温の状態に保持できる。 According to the showcase configured as described above, as shown in FIG. 6, the cold air supplied through the vertical passage 4b is blown out from the first blowout port 11 and the third blowout port 13 and simultaneously communicated with the vertical passage 4b. The cold air fed to the blowout chamber 27 via the port 32 can be blown out and supplied from the left and right first blowout holes 28 to the low temperature area A1. Furthermore, in the area below the lowermost damper opening 14, the cool air can be blown out from the second blowing holes 36, and the entire low temperature area A 1 can be kept at a low temperature.

第３通路６内に導入されてシーズヒーター２３で加熱された加温空気は、ダンパー部４１より上側に位置する第３吹出口１３から高温エリアＡ２へ吹出され、さらに、通口３２を介して吹出チャンバー２７に送給された加温空気が第１吹出穴２８から吹出されて、高温エリアＡ２を低温エリアＡ１より高温の状態に保持する。とくに、第３吹出口１３から高温エリアＡ２へ吹出された加温空気は、中間ダクト９の真上に位置する棚板８、あるいはその上面に陳列された商品群に接触して、棚板８あるいは商品群を常温の状態に維持する。従って、高温エリアＡ２の底部の温度が、高温エリアＡ２の他の部位の温度より低くなるのを解消して、商品の食感や食味が損なわれるのを確実に防止できる。棚板８の下面が中間ダクト９の冷気で冷却されて結露が生じることもない。 The heated air introduced into the third passage 6 and heated by the sheathed heater 23 is blown out from the third blower outlet 13 located above the damper portion 41 to the high temperature area A2, and further through the vent 32. The heated air supplied to the blowout chamber 27 is blown out from the first blowout hole 28, and the high temperature area A2 is kept at a higher temperature than the low temperature area A1. In particular, the heated air blown out from the third air outlet 13 to the high temperature area A2 contacts the shelf board 8 located directly above the intermediate duct 9 or the product group displayed on the upper surface thereof, and the shelf board 8 Alternatively, the product group is maintained at room temperature. Therefore, the temperature of the bottom of the high temperature area A2 can be prevented from being lower than the temperature of other parts of the high temperature area A2, and the texture and taste of the product can be reliably prevented from being impaired. The bottom surface of the shelf board 8 is cooled by the cold air from the intermediate duct 9 so that condensation does not occur.

上記のように、吹出チャンバー２７の内部には、縦通路４ｂから送給された冷気と、第３通路６から送給された加温空気とが同時に存在する。しかし、冷気の比重は加温空気の比重に比べて大きく、逆に加温空気の比重は冷気の比重に比べて小さい。そのため、冷気が吹出チャンバー２７の上部へ流動することはなく、同様に加温空気が吹出チャンバー２７の下部へ流動することもない。そのため、冷気と加温空気との隣接部分においては、両者の一部が混在する状態で存在し、近くの第１吹出穴２８から低温エリアＡ１または高温エリアＡ２に吹出されることが予想される。しかし、冷気と加温空気の殆どは、冷気と加温空気との隣接部分以外に設けられた第１吹出穴２８から、対応する各エリアＡ１・Ａ２へ適正に吹出されるので、低温エリアＡ１の温度状態、および高温エリアＡ２の温度状態を適正に維持することができる。 As described above, the cold air supplied from the vertical passage 4 b and the heated air supplied from the third passage 6 exist simultaneously in the blowout chamber 27. However, the specific gravity of the cold air is larger than the specific gravity of the heated air, and conversely, the specific gravity of the heated air is smaller than the specific gravity of the cold air. Therefore, cold air does not flow to the upper part of the blowing chamber 27, and similarly, warm air does not flow to the lower part of the blowing chamber 27. Therefore, in the adjacent part of cold air and warm air, both of them exist in a mixed state and are expected to be blown out from the nearby first blowout hole 28 to the low temperature area A1 or the high temperature area A2. . However, since most of the cool air and the warm air are properly blown out from the first blow holes 28 provided in areas other than the adjacent portions of the cool air and the warm air to the corresponding areas A1 and A2, the low temperature area A1. And the temperature state of the high temperature area A2 can be properly maintained.

また、第２通路５を介して送給された循環空気を、第２吹出口１２から吸込口１０へ向かって吹出すことにより、高温エリアＡ２の前面を常温のエアーカーテンで覆って、高温エリアＡ２内の加温された空気が高温エリアＡ２の外へ流出するのを防止できる。同様に、常温のエアーカーテンは、冷気のエアーカーテンの前面を覆って、低温エリアＡ１の冷気が低温エリアＡ１の外へ流出するのを防止できる。従って、加温空気、あるいは冷気が陳列室２の外へ散逸するのを防止して、エネルギーの無駄な消費を解消できる。加温空気の漏出しがない分だけ高温エリアＡ２を効果的に加温できる。 Further, the circulating air fed through the second passage 5 is blown out from the second air outlet 12 toward the air inlet 10 so that the front surface of the high temperature area A2 is covered with a normal temperature air curtain, and the high temperature area It is possible to prevent the heated air in A2 from flowing out of the high temperature area A2. Similarly, the air curtain at normal temperature covers the front of the cold air curtain and can prevent the cold air in the low temperature area A1 from flowing out of the low temperature area A1. Therefore, it is possible to prevent the warm air or the cool air from being dissipated out of the display chamber 2 and to eliminate wasteful consumption of energy. The high temperature area A2 can be effectively heated as much as there is no leakage of heated air.

吸込口１０から吸込まれた循環空気は、常温の空気と低温エリアＡ１内を冷却した後の冷気とを含んでいる。また、第２通路５内へ導入された循環空気は、蒸発器１６の後を通過する間に僅かではあるが冷却されて低温になる。しかし、第３通路６に導入された循環空気は、シーズヒーター２３で強制的に加熱されるので、高温エリアＡ２の内部温度を常に常温の状態に保持することができる。なお、低温エリアＡ１へ送給される調和空気量と、高温エリアＡ２へ送給される調和空気量とは、後者を１とするとき前者は２．５に設定してある。 The circulating air sucked from the suction port 10 includes room temperature air and cold air after cooling the inside of the low temperature area A1. In addition, the circulating air introduced into the second passage 5 is cooled to a low temperature while being slightly passed while passing behind the evaporator 16. However, since the circulating air introduced into the third passage 6 is forcibly heated by the sheathed heater 23, the internal temperature of the high temperature area A2 can always be kept at a normal temperature. Note that the conditioned air amount supplied to the low temperature area A1 and the conditioned air amount supplied to the high temperature area A2 are set to 2.5 when the latter is 1.

上記のように構成した２温度式のショーケースにおいては、低温エリアＡ１の内部温度を低温の状態に維持して、お茶、ジュース、炭酸飲料などを冷やすことができる。また、高温エリアＡ２の内部温度を常温の状態に維持して、おにぎりや弁当などが冷却されるのを防ぐ。２温度式のショーケースは、中間ダクト９を取外すことにより、陳列室２の全体を低温エリアＡ１にして冷蔵ショーケースとして使用することができる。その場合には、第１通路４内に送給された冷気の大半を、分岐構造を介して第２通路５へ循環させ、第２吹出口１２から吹出すことができる。この状態の全てのダンパー開口１４はドア１９で塞がれており、冷気の大半が流動抵抗が小さな第２通路５側へ流動するので、第３吹出口６から吹出される冷気の量が減少し、第１吹出穴２８から吹出される冷気の量も減少する。そのため、２温度式のショーケースとして使用する場合に比べて、第２吹出口１２から吹出される循環空気（冷気）の量が増加する。なお、ショーケースを冷蔵ショーケースとして使用する場合には、シーズヒーター２３への通電は停止される。 In the two-temperature type showcase configured as described above, tea, juice, carbonated beverages, and the like can be cooled by maintaining the internal temperature of the low temperature area A1 at a low temperature. In addition, the internal temperature of the high temperature area A2 is maintained at a normal temperature to prevent the rice balls and lunch boxes from being cooled. The two-temperature type showcase can be used as a refrigerated showcase by removing the intermediate duct 9 so that the entire display chamber 2 is made into a low temperature area A1. In that case, most of the cool air fed into the first passage 4 can be circulated to the second passage 5 via the branch structure and blown out from the second outlet 12. All damper openings 14 in this state are closed by doors 19 and most of the cool air flows to the second passage 5 side where the flow resistance is small, so the amount of cool air blown out from the third outlet 6 is reduced. In addition, the amount of cold air blown out from the first blow hole 28 is also reduced. Therefore, the amount of circulating air (cold air) blown out from the second outlet 12 is increased as compared with the case of using as a two-temperature type showcase. When the showcase is used as a refrigerated showcase, energization to the sheathed heater 23 is stopped.

図８ないし図１０は、吹出チャンバー２７の内部構造を変更した別の実施例を示す。そこでは、吹出チャンバー２７を、横隔壁２９で上多段状に区画された小区画３０で構成した。この場合の横隔壁２９は、各ダンパー開口１４の設置個数に対応して配置してある。また、各小区画３０と第３通路６、あるいは各小区画３０と縦通路４ｂとは、それぞれ縦隔壁３１に開口した通口３２を介して連通し、吹出チャンバー２７の前面を覆う吹出壁３３に、各小区画３０ごとに第１吹出穴２８を開口する。 8 to 10 show another embodiment in which the internal structure of the blowout chamber 27 is changed. In this case, the blowout chamber 27 is composed of small compartments 30 which are divided into upper multi-stages by a horizontal partition wall 29. In this case, the horizontal partition walls 29 are arranged corresponding to the number of installed damper openings 14. Further, each small section 30 and the third passage 6, or each small section 30 and the vertical passage 4 b communicate with each other through a through-hole 32 opened to the vertical partition wall 31, and a blowout wall 33 that covers the front surface of the blowout chamber 27. In addition, the first blowing hole 28 is opened for each small section 30.

以上のように、吹出チャンバー２７を多段状の小区画３０で構成すると、吹出チャンバー２７の内部に送給された冷気と加温空気とが混じりあうのを確実に防止できる。これにより、縦通路４ｂと通口３２を介して各小区画３０に送給された冷気は、第１吹出穴２８から低温エリアＡ１のみへ吹出供給され、さらに、第３通路６と通口３２を介して各小区画３０に送給された加温空気は、第１吹出穴２８から高温エリアＡ２へのみ吹出供給される。従って、低温エリアＡ１の温度状態、および高温エリアＡ２の温度状態をさらに適正に維持することができる。他は、先の実施例と同じであるので、同じ部材に同じ符号を付してその説明を省略する。 As described above, when the blowout chamber 27 is configured by the multistage small sections 30, it is possible to reliably prevent the cold air and the warm air fed into the blowout chamber 27 from being mixed. As a result, the cold air supplied to each of the small sections 30 via the vertical passage 4b and the vent 32 is blown and supplied only from the first blow hole 28 to the low temperature area A1, and further, the third passage 6 and the vent 32 are supplied. The heated air supplied to each of the small sections 30 through the air is blown out and supplied only from the first blow hole 28 to the high temperature area A2. Therefore, the temperature state of the low temperature area A1 and the temperature state of the high temperature area A2 can be maintained more appropriately. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

上記の実施例では、シーズヒーター２３で循環空気を加熱するようにしたが、シーズヒーター２３に換えて面状ヒーターやニクロム線ヒーターを熱源にして循環空気を加熱してもよい。蒸発器１６は、縦通路４ｂの上下複数箇所に配置することができる。第３吹出口１３、第１吹出穴２８、第２吹出穴３６の開口形状および配置パターンは、自由に設定できるので、実施例で説明した開口形状および配置パターンには限定しない。棚板８は板ガラス以外に、金属板材やプラスチック板材で形成してあってもよい。 In the above embodiment, the circulating air is heated by the sheathed heater 23, but the circulating air may be heated by using a planar heater or a nichrome wire heater as a heat source instead of the sheathed heater 23. The evaporator 16 can be arrange | positioned in the up-and-down several places of the vertical channel | path 4b. Since the opening shape and arrangement pattern of the 3rd blower outlet 13, the 1st blowing hole 28, and the 2nd blowing hole 36 can be set freely, it is not limited to the opening shape and arrangement pattern which were demonstrated in the Example. The shelf board 8 may be formed of a metal plate material or a plastic plate material in addition to the plate glass.

高温エリアＡ２の設定温度は２０℃以上であってもよく、例えば設定温度が４０〜５０℃であってもよい。その場合には、分岐構造の位置を第２通路５の上端寄りに設けて第３通路６の上下長さを大きくし、その内部に複数のシーズヒーター２３を配置して、加温空気の温度を高温度にすることができる。ゴムマグネットの代わりに、磁石２０で接合壁１９ａを吸着して、ドア１９の閉じ姿勢を保持することができる。 The set temperature of the high temperature area A2 may be 20 ° C. or higher, for example, the set temperature may be 40 to 50 ° C. In that case, the position of the branch structure is provided near the upper end of the second passage 5 to increase the vertical length of the third passage 6, and a plurality of sheathed heaters 23 are disposed therein, so that the temperature of the heated air is increased. Can be brought to a high temperature. Instead of the rubber magnet, the bonding wall 19a can be adsorbed by the magnet 20 and the door 19 can be kept closed.

１本体ケース
２陳列室
３内ケース
３ａ内ケースの後壁
４第１通路
５第２通路
６第３通路
９中間ダクト
１０吸込口
１１第１吹出口
１２第２吹出口
１３第３吹出口
１４ダンパー開口
１９ドア
２３シーズヒーター（ヒーター）
２７吹出チャンバー
２８第１吹出穴
２９横隔壁
３０小区画
３１縦隔壁
３２通口
４０ダクト本体
４１ダンパー部
Ａ１低温エリア
Ａ２高温エリア DESCRIPTION OF SYMBOLS 1 Main body case 2 Display chamber 3 Inner case 3a Inner case rear wall 4 1st channel | path 5 2nd channel | path 6 3rd channel | path 9 Intermediate | middle duct 10 Inlet 11 First outlet 12 Second outlet 13 Third outlet 14 Damper Opening 19 Door 23 Seeds heater (heater)
27 Blowing chamber 28 First blowing hole 29 Horizontal partition wall 30 Small section 31 Vertical partition wall 32 Entrance 40 Duct body 41 Damper part A1 Low temperature area A2 High temperature area

Claims

It has a main body case (1) and an inner case (3) that partitions the display room (2). The inside of the display room (2) is an intermediate duct (9) with a lower low temperature area (A1) and an upper case A two-temperature showcase divided into a high-temperature area (A2),
The 1st blower outlet which blows off the cold supplied through the 1st passage (4) toward the suction port (10) of the lower end front part of a low-temperature area (A1) at the front part of an intermediate duct (9) (11) is provided,
Circulation supplied through the second passage (5) branched from the first passage (4) between the circulation fan (15) and the evaporator (16) to the front upper end of the high temperature area (A2). A second outlet (12) is provided for blowing air toward the inlet (10);
On the rear wall (3a) of the inner case (3) facing the display room (2), there is a third outlet (13) for blowing cool air or warm air toward both areas (A1, A2), and an intermediate duct. Damper openings (14) for inserting and mounting (9) are arranged in a multi-stage shape,
A heater (23) is arranged inside the third passage (6) branched from the middle portion of the second passage (5) and feeding a part of the circulating air toward the third outlet (13). And
The third passage (6) is provided in a state of being continuous with the upper side of the first passage (4), and the difference in the mounting position of the damper portion (41) provided in the intermediate duct (9) with respect to the damper opening (14). Accordingly, the vertical position of both the passages (4, 6) can be changed,
Warm air heated by the heater (23) is blown out from the third blower outlet (13) toward the high temperature area (A2), and the bottom of the high temperature area (A2) is cooled by cold air passing through the intermediate duct (9). A two-temperature showcase that prevents this from happening.

The first passage (4) includes a bottom passage (4a) along the bottom of the low temperature area (A1) and a vertical passage (4b) along the rear of the low temperature area (A1).
The vertical passage (4b) and the third passage (6) are a rear wall (3a) of the inner case (3) and an intermediate wall (17) disposed between the wall (3a) and the main body case (1). And is partitioned between
Blowing chambers (27) are defined on the left and right sides of the longitudinal passage (4b) and the third passage (6) of the first passage (4),
The third passage (6) and the longitudinal passage (4b) and the blowout chamber (27) communicate with each other via a passage opening (32) opened in the longitudinal partition wall (31) that divides them into left and right.
A group of first blowing holes (28) are opened in the blowing wall (33) covering the front surface of the blowing chamber (27),
Cold air fed to the blowout chamber (27) through the vertical passage (4b) and the vent (32) is blown out from the first blowout hole (28) to the low temperature area (A1),
Heated air fed to the blowout chamber (27) through the third passage (6) and the vent (32) is blown out from the first blowout hole (28) to the high temperature area (A2). The two-temperature type showcase according to claim 1.

The blowout chamber (27) is composed of small compartments (30) that are partitioned into upper and lower multi-stages by transverse partitions (29) arranged corresponding to the respective damper openings (14).
The third passage (6) and the longitudinal passage (4b) and each of the small sections (30) communicate with each other via a passage opening (32) opened in a longitudinal partition wall (31) that divides them into left and right.
The blowout wall (33) covering the front surface of the blowout chamber (27) has a first blowout hole (28) opened for each small section (30),
The cold air fed to each small section (30) through the vertical passage (4b) and the vent (32) is blown out from the first blow hole (28) to the low temperature area (A1),
Warming air supplied to each small section (30) through the third passage (6) and the opening (32) is blown out from the first blowing hole (28) to the high temperature area (A2). The two-temperature type showcase according to claim 2, wherein the two-temperature type showcase is characterized.

A group of second outlet holes (36) are opened in the rear wall (3a) below the lowermost damper opening (14),
A part of the cold air after heat exchange fed into the first passage (4) is blown out and supplied from the first blow hole (28) and the second blow hole (36) to the low temperature area (A1). A two-temperature showcase according to 2 or 3.

A circulation fan (15) is disposed in the bottom passage (4a) of the first passage (4), and an evaporator (16) is disposed in the lower portion of the longitudinal passage (4b).
A retaining wall (37) projects from the rear surface of the rear wall (3a) above the upper end of the evaporator (16),
A part of the cold air after the heat exchange that has passed through the evaporator (16) is blocked by a blocking wall (37) and directed to the second blowing hole (36),
The first temperature sensor (38) for detecting the temperature of the cold air after heat exchange is arranged at the lower end of the first passage (4) below the blocking wall (37). A two-temperature showcase according to any one of the above.

A branch structure is provided in the middle of the second passage (5) to guide part of the circulating air passing through the passage (5) toward the third passage (6).
The branch structure is circulated by projecting from the lower branch wall (21) projecting from the upper part of the intermediate wall (17) toward the rear wall (3a) and from the rear wall (3a) above the lower branch wall (21). It consists of an upper branch wall (22) that blocks part of the air,
A sheathed heater (23) is disposed at the front end of the lower branch wall (21), and a second temperature for detecting the temperature of the heated air heated by the sheathed heater (23) in the vicinity of the lower surface of the lower branch wall (21). The two-temperature showcase according to any one of claims 2 to 5, wherein a sensor (24) is arranged.