KR0127385Y1 - Cold air circulation circuit when showcase door is open - Google Patents

Cold air circulation circuit when showcase door is open

Info

Publication number
KR0127385Y1
KR0127385Y1 KR2019960018410U KR19960018410U KR0127385Y1 KR 0127385 Y1 KR0127385 Y1 KR 0127385Y1 KR 2019960018410 U KR2019960018410 U KR 2019960018410U KR 19960018410 U KR19960018410 U KR 19960018410U KR 0127385 Y1 KR0127385 Y1 KR 0127385Y1
Authority
KR
South Korea
Prior art keywords
door
showcase
cold air
cooling fan
fan motor
Prior art date
Application number
KR2019960018410U
Other languages
Korean (ko)
Other versions
KR980004388U (en
Inventor
이정철
Original Assignee
배순훈
대우전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 배순훈, 대우전자주식회사 filed Critical 배순훈
Priority to KR2019960018410U priority Critical patent/KR0127385Y1/en
Publication of KR980004388U publication Critical patent/KR980004388U/en
Application granted granted Critical
Publication of KR0127385Y1 publication Critical patent/KR0127385Y1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/067—Evaporator fan units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0681—Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening

Abstract

본 고안은 쇼케이스의 냉기순환을 위한 회로에 관한 것으로서, 더욱 구체적으로는 온도조절기에 의하여 냉각팬이 정지한 상태에서 쇼케이스도어를 열어주는 경우에 발생되는 고내의 냉기유출을 방지하고 저장된 물건을 신선하게 유지할 수 있도록 도어가 열리면 냉각팬을 순환시키기 위한 쇼케이스 도어오픈시 냉기순환 회로에 관한 것이다.The present invention relates to a circuit for the cold air circulation of the showcase, and more specifically, to prevent cold air leakage in the refrigerator generated when the showcase door is opened while the cooling fan is stopped by the temperature controller and freshly stored objects. The present invention relates to a cold air circulation circuit for opening a showcase door to circulate a cooling fan when the door is opened for maintenance.

본 고안의 쇼케이스 도어오픈시 냉기순환회로는, 쇼케이스의 도어와 접촉하는 쇼케이스 하부전면에 설치되며 일측단자가 전선에 연결되고 타측단자가 냉각팬모터에 연결되어서, 도어가 개방되면 냉각팬모터에 전원을 공급하고 도어가 폐쇄되면 냉각팬모터에 전원공급이 차단되는 도어스위치가 연결된 것을 특징으로 한다.When the showcase door is opened, the cold air circulation circuit is installed on the lower surface of the showcase in contact with the showcase door, and one terminal is connected to the electric wire and the other terminal is connected to the cooling fan motor. Supply the door and the door is closed, characterized in that the door switch is connected to the power supply to the cooling fan motor is cut off.

Description

쇼케이스 도어오픈시 냉기순환회로Showcase door open air circulation circuit

제1도는 종래 사용되는 쇼케이스의 개략적인 배선도.1 is a schematic wiring diagram of a showcase conventionally used.

제2도는 본 고안에 의한 쇼케이스의 개략적인 배선도.2 is a schematic wiring diagram of a showcase according to the present invention.

제3도 및 제4도는 본 고안에 의한 스위치의 설치상태를 나타내기 위한 측단면도 및 정면도이다.3 and 4 are side cross-sectional views and front views for showing the installation state of the switch according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 전원플러그 3 : 누전차단기1: power plug 3: earth leakage breaker

5 : 휴즈 7 : 제상타이머5: Hughes 7: defrost timer

9 : 제상히터 11 : 온도조절기9: defrost heater 11: temperature controller

13 : 콤퓨레샤 15 : 응축기팬모터13: compressor 15: condenser fan motor

17 : 냉각팬모터 18 : 도어스위치17: cooling fan motor 18: door switch

19 : 냉각팬 20 : 쇼케이스19: cooling fan 20: showcase

21 : 도어21: door

본 고안은 쇼케이스의 냉기순환을 위한 회로에 관한 것으로서, 더욱 구체적으로는 온도조절기에 의하여 냉각팬이 정지한 상태에서 쇼케이스도어를 열어주는 경우에 발생되는 고내의 냉기유출을 방지하고 저장된 물건을 신선하게 유지할 수 있도록 도어가 열리면 냉각팬을 순환시키기 위한 쇼케이스 도어오픈시 냉기순환 회로에 관한 것이다.The present invention relates to a circuit for the cold air circulation of the showcase, and more specifically, to prevent cold air leakage in the refrigerator generated when the showcase door is opened while the cooling fan is stopped by the temperature controller and freshly stored objects. The present invention relates to a cold air circulation circuit for opening a showcase door to circulate a cooling fan when the door is opened for maintenance.

쇼케이스는 음료수 캔이나 아니스크림, 또는 과일 등과 같은 상품을 저온 냉장, 또는 냉동 상태로 보관하면서 외부에서 소비자가 내부에 진열된 아이스크림 또는 음료수 캔등의 상품을 들여다 볼 수 있도록 구성된 전기기기이다. 저장된 캔이나 아이스크림과 같은 음식물을 저온유지하기 위하여 냉기를 발생시키는 장치의 사용이 필수적이며 이것의 원리를 하기에 설명한다.The showcase is an electric device configured to allow consumers to look at products such as ice cream or beverage cans that are displayed inside while storing products such as beverage cans, anise cream, or fruits in a low temperature chilled or frozen state. In order to keep foods such as stored cans or ice cream at a low temperature, the use of a device for generating cold air is essential and the principle thereof will be described below.

종래 사용되는 일반적인 쇼케이스 냉각발생장치는, 냉매를 고온, 고압의 기체로 압축시키기 위한 콤퓨레샤와, 압축된 냉매를 액화시키기 위한 응축기와, 응축기로 부터 배출되는 고압 상태의 냉매 압력을 강하시키는 팽창변과, 냉매를 기화시켜 냉기를 발생시키기 위한 냉각기, 상기 응축기로부터 열을 발산시키기 위한 것으로 팬구동모터에 의하여 동작하는 응축기팬과, 상기 냉각기로부터 발생된 냉기를 쇼케이스 내부로 강제로 순환시키는 냉각팬을 포함하고 있다.Conventionally used showcase cooling generators include a compressor for compressing a refrigerant into a gas of high temperature and high pressure, a condenser for liquefying the compressed refrigerant, and an expansion valve for lowering the pressure of the high pressure refrigerant discharged from the condenser. And a cooler for evaporating coolant to evaporate refrigerant, a condenser fan for dissipating heat from the condenser, and a condenser fan operated by a fan driving motor, and a cooling fan forcibly circulating cool air generated from the cooler into the showcase. It is included.

정상적으로 냉기를 발생시키기 위한 냉각모드상태에서, 상기 콤퓨레샤와 냉각팬, 응축기팬은 온도 조절기에 의하여 설정된 온도 범위에 의하여 동시에 작동된다.In the cooling mode to normally generate cold air, the compressor, the cooling fan, and the condenser fan are operated simultaneously by the temperature range set by the temperature controller.

제1도는 종래 사용되는 쇼케이스중의 하나의 부분적인 전기배선도로서, 전원을 공급하기 위한 전원플러그(1)와, 과대전류의 발생시 회로를 보호하기 위한 누전차단기(3)와, 고압 또는 과전류가 흐르는 것을 방지하기 위한 휴즈(5)와, 주기적으로 접속점이 변경되어 냉각행정과 제상행정을 번갈아 수행하도록 설정된 제상타이머(7)와, 냉각기의 표면에 형성된 성에를 제거하기 위한 제상히터(9)와, 냉매를 고온, 고압의 기체로 압축시키기 위한 콤퓨레샤(13)와, 응축기로부터 발생되는 열을 발산시키기 위한 응축기팬모터(15)와, 냉각기로부터 발생된 냉기를 순환시키기 위한 냉각팬모터(17)가 도시되어 있다.1 is a partial electric wiring diagram of one of the conventionally used showcases, which includes a power plug 1 for supplying power, an earth leakage breaker 3 for protecting a circuit in the event of an overcurrent, and a high voltage or overcurrent A fuse 5 for preventing the dust, a defrost timer 7 which is periodically changed to perform a cooling stroke and a defrost stroke, a defrost heater 9 for removing frost formed on the surface of the cooler, and a refrigerant Compressor 13 for compressing the gas into a high-temperature, high-pressure gas, a condenser fan motor 15 for dissipating heat generated from the condenser, and a cooling fan motor 17 for circulating cold air generated from the cooler. Is shown.

정상적인 동작상테에서는 전원플러그(1)를 통하여 공급되는 전원은 전선(L1,L2)으로부터 제상타이머(7)를 통하여 공급된다. 공급된 전원은 다시 온도조절기(11)를 통하여 콤퓨레샤(13)와, 응축기팬모터(15)와, 냉각팬모터(17)에 동시에 인가된다. 따라서 콤퓨레샤(13), 응축기팬모터(15)와, 냉각팬모터(17)는 동시에 작동하도록 설정되어 있다.In normal operation, power supplied through the power plug 1 is supplied from the wires L1 and L2 through the defrost timer 7. The supplied power is again applied simultaneously to the compressor 13, the condenser fan motor 15, and the cooling fan motor 17 through the temperature controller 11. Therefore, the compressor 13, the condenser fan motor 15, and the cooling fan motor 17 are set to operate simultaneously.

상기와 같은 쇼케이스에서는 고내의 온도가 설정온도이하로 내려가면 온도조절기(11)에 의하여 냉각장치의 작동이 중지된다. 이 때에는 냉각팬모터(17)의 동작도 역시 중지되며 소위 에어커튼효과가 전혀 없는 상태가 된다. 이렇게 냉각장치의 작동이 중지된 상태에서 물건을 꺼내기 위하여 쇼케이스 도어을 열고 닫는 경우가 빈번하기 발생된다. 이에 따라서 고내의 냉기를 급속하게 외부로 유출되어 고내의 온도가 상승하게 된다. 따라서 저장된 물건의 신선도유지상태가 열화되며 또한 고내의 온도를 하강시키기 위하여 더욱 많은 에너지를 소비하여야 하는 문제점이 있었던 것이다.In the showcase as described above, the operation of the cooling device is stopped by the temperature controller 11 when the temperature in the refrigerator drops below the set temperature. At this time, the operation of the cooling fan motor 17 is also stopped and the air curtain effect is not at all. The showcase door is frequently opened and closed in order to remove the object while the operation of the cooling device is stopped. As a result, the cold air in the refrigerator flows out to the outside rapidly, and the temperature in the refrigerator rises. Therefore, the freshness maintaining state of the stored object is deteriorated, and there was a problem that more energy must be consumed in order to lower the temperature in the refrigerator.

본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 고안의 목적은 쇼케이스의 온도조절기에 의하여 냉각장치가 오프된 상태에서 도어의 개방 및 페쇄에 의하여 발생되는 고내온도의 상승을 지연시키기 위한 쇼케이스 도어오픈시 냉기순환회로를 제공하는데 있다.The present invention is devised to solve the above problems, an object of the present invention is to delay the rise of the internal temperature caused by the opening and closing of the door in the state that the cooling device is turned off by the temperature controller of the showcase It is to provide a cold air circulation circuit at the showcase door opening.

상기 목적을 달성하기 위한 본 고안의 쇼케이스 도어오픈시 냉기순환회로는, 쇼케이스의 도어와 접촉하는 쇼케이스 하전면에 설치되며 일측단자가 전선에 연결되고 타측단자가 냉각팬모터에 연결되어서, 도어가 개방되면 냉각팬모터에 전원을 공급하고 도어가 폐쇄되면 냉각팬모터에 전원공급이 차단되는 도어스위치가 연결된 것을 특징으로 한다.The cold air circulation circuit of the showcase door opening of the present invention for achieving the above object is installed on the showcase lower surface in contact with the door of the showcase, one terminal is connected to the wire and the other terminal is connected to the cooling fan motor, the door is opened When the power supply to the cooling fan motor and the door is closed, characterized in that the door switch is cut off the power supply to the cooling fan motor.

이하 첨부된 도면을 참고하여 본 고안의 쇼케이스 도어오픈시 냉기순환회로를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the showcase door opening air circulation circuit of the present invention.

제2도는 본 고안에 의한 도어스위치의 설치상태를 나타내는 전기배선도이다. 도시된 바와 같이, 종래의 온도조절기(11)와 냉각팬모터(17)를 연결하는 전선의 중간에 도어스위치(18)의 일측단자가 연결되며, 타측단자는 전원이 공급되는 전선(L1)에 연결된다. 상기 도어스위치(18)의 상태는 쇼케이스의 도어가 닫힌 상태이면 오프가 되고 도어가 열린 상태이면 온이 되도록 설정된다. 이렇게 함으로써 온도조절기(11)의 상태에 관계없이 작동하게 된다.2 is an electric wiring diagram showing the installation state of the door switch according to the present invention. As shown, one terminal of the door switch 18 is connected to the middle of the wire connecting the conventional temperature controller 11 and the cooling fan motor 17, and the other terminal is connected to the wire L1 to which power is supplied. Connected. The state of the door switch 18 is set to be off when the door of the showcase is closed and on when the door is open. By doing so, it is possible to operate regardless of the state of the temperature controller 11.

제3도 및 제4도는 본 고안에 의하여 쇼케이스(20)에 부착되는 도어스위치(18)의 설치상태를 나타개기 위한 것으로서, 측단면도 및 정면도이다. 도시된 바와 같이, 도어스위치(18)는 도어(21)가 완전히 닫힌 상태에서 눌려진 상태를 유지한다. 이때의 상태는 오프상태로서 전원이 공급되지 않는 것이다. 따라서 온도조절기(11)가 온상태 또는 오프상태이건간에 전원이 공급되지 않는다.3 and 4 are for showing the installation state of the door switch 18 attached to the showcase 20 according to the present invention, a side cross-sectional view and a front view. As shown, the door switch 18 remains pressed in the state in which the door 21 is completely closed. The state at this time is an off state and no power is supplied. Therefore, no power is supplied whether the thermostat 11 is on or off.

제4도와 같이 도어(21)가 열리게 되면 도어스위치(18)는 압력을 받던 상태에서 압력이 제거된 상태기 된다. 따라서 도어스위치(18)는 온상태가 되는 것이다. 온상태가 되면 제2도에서와 같이 전선(L1)으로부터 전원이 공급된다. 따라서 도어스위치(18)에 연결된 냉각팬모터(17)에는 전원이 인가되어 회전하게 된다. 도어스위치(18)는 쇼케이스의 하부측에 설치된 것으로 설명되었지만 그것의 위치는 부주의로 인한 파손의 위험이 없는 장소, 예를 들면 쇼케이스 상부측의 도어접촉면에 설치할 수 있다.When the door 21 is opened as shown in FIG. 4, the door switch 18 is in a state in which the pressure is removed while the door 21 is under pressure. Therefore, the door switch 18 is turned on. When it is turned on, power is supplied from the wire L1 as shown in FIG. Therefore, power is applied to the cooling fan motor 17 connected to the door switch 18 to rotate. The door switch 18 is described as being installed on the lower side of the showcase, but its position can be installed in a place where there is no risk of inadvertent damage, for example, the door contact surface on the upper side of the showcase.

상기와 같은 도어스위치(18)의 동작을 온도조절기(11)의 동작과 연게하여 설명한다. 온도조절기(11)가 온상태로 작동되면 전선(L1)을 통하여 전원이 공급되어서 타이머(7)를 통과하여 콤퓨레샤(13), 응축기팬모터(15), 및 냉각팬모터(17)에 인가된다. 따라서 쇼케이스(20)에서는 정상적인 냉각행정이 수행된다. 이 때에는 도어스위치(18)가 온/오프되어도 전원이 항상 공급되므로 냉각팬모터(17)의 작동에는 아무런 영향을 끼치지 않는다.The operation of the door switch 18 as described above will be described in connection with the operation of the temperature controller 11. When the temperature controller 11 is operated in an on state, power is supplied through the wire L1 to pass through the timer 7 to the compressor 13, the condenser fan motor 15, and the cooling fan motor 17. Is approved. Therefore, in the showcase 20, a normal cooling stroke is performed. In this case, since the power is always supplied even when the door switch 18 is turned on / off, there is no influence on the operation of the cooling fan motor 17.

이러한 상태에서 고내의 온도가 설정온도이하로 내려가면 온도조절기(11)의 접점이 떨어져서 온도조절기(11)가 오프된다. 따라서 통상적으로 전선(L1)으로부터 인가되는 전원이 공급되지 않는다. 이에 따라서 콤퓨레샤(13), 응축기팬모터(15), 및 냉각팬모터(17)에는 전원이 인가되지 않으므로 냉각행정이 정지하게 된다.In this state, when the temperature in the refrigerator falls below the set temperature, the contact of the temperature controller 11 is dropped and the temperature controller 11 is turned off. Therefore, the power applied from the wire L1 is not normally supplied. Accordingly, since the power is not applied to the compressor 13, the condenser fan motor 15, and the cooling fan motor 17, the cooling stroke is stopped.

따라서 온도조절기(11)와 도어스위치(18)는 모두 오프상태를 유지한다. 이 때 소비자가 쇼케이스(20)에 저장된 물건을 꺼내기 위하여 쇼케이스도어(21)를 열어주면 종래에는 고내의 냉기가 외부로 유출되고 고내의 온도가 신속하게 상승하였던 것이다.Therefore, both the temperature controller 11 and the door switch 18 maintain the off state. At this time, when the consumer opens the showcase door 21 to take out the goods stored in the showcase 20, conventionally, the cold air in the inside of the store is leaked to the outside and the temperature in the inside of the store quickly rises.

그러나 본 고안에서는 도어(21)가 닫힌 상태에서는 오프되어 있던 도어스위치(18)가 도어(21)가 열림으로써 온된다. 따라서 전선(L1)으로부터 직접 전원이 인가되며, 인가된 전원은 냉각팬모터(17)에 인가된다. 따라서 냉각팬모터(17)가 회전하며 이에 따라서 고내의 냉기가 순환하게 된다.However, in the present invention, the door switch 18 which is turned off while the door 21 is closed is turned on by the door 21 being opened. Therefore, power is directly applied from the wire L1 and the applied power is applied to the cooling fan motor 17. Therefore, the cooling fan motor 17 rotates, thereby circulating cold air in the refrigerator.

이 때 냉기의 순환은 제3도를 참고하면 쇼케이스의 상부그릴(미도시됨)로부터 고내를 통과하여 하부그릴(미도시됨)로 유입되는 순환과정을 수행하여 에어커튼효과를 발생시키게 된다. 따라서 강제적으로 냉기가 순환되므로 종래와 같이 냉기가 외부로 유출되는 양이 감소하며 동시에 냉긱가 물건에 더욱 많이 접촉하게 되므로 냉각효과가 종래보다 저하되지 않게 된다.In this case, referring to FIG. 3, the circulation of cold air passes through the interior of the upper grill (not shown) of the showcase and flows into the lower grill (not shown) to generate an air curtain effect. Therefore, since the cold air is forced to circulate, the amount of cold air leaks to the outside as in the prior art is reduced, and at the same time, the cold gig is more in contact with the article, so that the cooling effect is not lowered than in the prior art.

상기와 같이 본 고안에 의하면 쇼케이스의 온도조절기에 의하여 냉각장치가 오프된 상태에서 도어의 개방 및 폐쇄에 의하여 발생되는 고내온도의 상승을 지연시킬 수 있으며, 냉각효과의 저하를 예방할 수 있는 이점이 있는 것이다.According to the present invention as described above can delay the rise of the internal temperature caused by the opening and closing of the door in the state that the cooling device is turned off by the thermostat of the showcase, there is an advantage that can prevent the degradation of the cooling effect will be.

본 고안은 기재된 구체예에 대해서만 상세히 설명되었지만 본 고안의 사상과 범위내에서 변형이나 변경할 수 있음은 본 고안이 속하는 분야의 당업자에게는 명백한 것이며, 그러한 변형이나 변경은 첨부한 실용신안등록청구범위에 속한다할 것이다.Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that the present invention may be modified or changed within the spirit and scope of the present invention, and such modifications and changes are included in the appended claims of utility model registration. something to do.

Claims (1)

온도조절기(11)에 의하여 작동되는 콤퓨레샤(13), 응축기팬모터(15), 및 냉각팬모터(17)를 포함하는 쇼케이스에 있어서, 상기 온도조절기(11)와 냉각팬모터(17)의 중간에 일측단자가 연결되며 타측단자가 전선(L1)에 연결되어 전원을 공급하는 것으로서, 쇼케이스(20)의 도어(21)와 접촉되는 접촉면상에 설치되어 도어(21)가 닫힌상태에서는 오프되고 도어(21)가 열린 상태에서는 온되어서 상기 냉각팬모터(17)에 전원을 공급하는 것을 특징으로 하는 쇼케이스 도어오픈시 냉기순환회로.In a showcase including a compressor 13, a condenser fan motor 15, and a cooling fan motor 17 operated by a temperature controller 11, the temperature controller 11 and a cooling fan motor 17 are provided. One terminal is connected to the middle of the terminal and the other terminal is connected to the wire (L1) to supply power, and is installed on the contact surface in contact with the door 21 of the showcase 20, the door 21 is turned off in the closed state And the door 21 is turned on in the open state to supply power to the cooling fan motor 17.
KR2019960018410U 1996-06-28 1996-06-28 Cold air circulation circuit when showcase door is open KR0127385Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019960018410U KR0127385Y1 (en) 1996-06-28 1996-06-28 Cold air circulation circuit when showcase door is open

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KR0127385Y1 true KR0127385Y1 (en) 1998-11-02

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