WO2020125451A1 - 冰箱 - Google Patents

冰箱 Download PDF

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Publication number
WO2020125451A1
WO2020125451A1 PCT/CN2019/123671 CN2019123671W WO2020125451A1 WO 2020125451 A1 WO2020125451 A1 WO 2020125451A1 CN 2019123671 W CN2019123671 W CN 2019123671W WO 2020125451 A1 WO2020125451 A1 WO 2020125451A1
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WIPO (PCT)
Prior art keywords
refrigerator
heat
space
pipe portion
inner box
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PCT/CN2019/123671
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English (en)
French (fr)
Inventor
塚原紘也
铃木悠太
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
Aqua株式会社
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Application filed by 青岛海尔电冰箱有限公司, 海尔智家股份有限公司, Aqua株式会社 filed Critical 青岛海尔电冰箱有限公司
Publication of WO2020125451A1 publication Critical patent/WO2020125451A1/zh

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    • 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
    • F25D17/08—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 using ducts
    • 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
    • F25D23/00—General constructional features
    • F25D23/08—Parts formed wholly or mainly of plastics materials

Definitions

  • the invention relates to a refrigerator.
  • the cold air in the storage compartment (refrigerator compartment, vegetable compartment, freezing compartment, etc.) of the refrigerator returns to the evaporator through the return air passage, which is disposed, for example, at the back of the storage compartment and communicates with the storage compartment.
  • the return cold air flowing back to the evaporator is cooled again, and is supplied to the storage room through the cold air supply duct.
  • the return air duct is often provided in the back space of the storage room.
  • the refrigerator has such a structure, the volume of the storage compartment is reduced due to the arrangement of the return air passage. Therefore, a refrigerator is proposed, the return air passage of which is not arranged in the back space of the storage room, but is arranged in the space filled with the insulation material between the outer box and the inner box of the heat insulation box of the refrigerator.
  • the refrigerator of this structure is disclosed in the patent document of Japanese Patent Laid-Open No. 2012-233688.
  • the disclosed refrigerator includes: a heat insulation box filled with an insulation material between the outer box and the inner box; a refrigerator compartment formed in the box; and a freezer compartment, It is arranged below the refrigerator compartment; the ice making compartment is arranged inside the refrigerator compartment door, and the refrigerator compartment door is used to open or close the refrigerator compartment; and the cold air return duct, connecting the freezing compartment and the ice making compartment; and the cold air return duct has
  • the structure is as follows: starting from the freezing room and passing through the partition wall separating the freezing room and the refrigerating room, and then passing through the inside of the insulation material on the side of the cabinet to reach the side wall of the refrigerating room.
  • an object of the present invention is to provide a refrigerator including a return air passage, which has the following structure: Even if the return air passage is arranged in a space filled with a heat insulating material having a small thickness as described above, it can Appropriately ensure the circulation of cold air without reducing the cooling efficiency of the storage room.
  • the refrigerator according to the present invention includes: a heat-insulating box body including an outer box, an inner box, and a heat-insulating material, and the heat-insulating material is filled between the outer box and the inner box In space
  • Cooling room located at the back of the storage room, containing the evaporator
  • the return air passage connects the storage room and the cooling room, and the flow returns from the storage room to the evaporator to return cold air;
  • the return air passage includes: a front end tube portion that opens toward the storage room, and at least two main pipes, and the main pipe portion introduces cold air drawn into the front end pipe portion into a cooling chamber;
  • the two main pipes are arranged in the back space of the space filled with the thermal insulation material.
  • a convex region protruding rearward is formed at the center in the width direction of the back surface of the inner box, and the two main pipes are arranged at a width wider than the convex region Outer position in the direction.
  • the return air duct includes at least two of the front-end pipe portions, one of the two front-end pipe portions is connected to one of the two main pipe portions, and the two The other of the front end tube part is connected to the other of the two main tube parts.
  • the two front-end tube portions are respectively provided on both sides of the storage compartment.
  • the heat insulation material is polyurethane foam
  • an exhaust hole is provided through the back of the inner box, and is used when the polyurethane foam is filled into the space filled with the heat insulation material;
  • the space sandwiched by the two main pipes communicates with the storage chamber through the exhaust hole.
  • a refrigerator the return air passage of which includes at least two main pipes, which guide cold air drawn into the front-end pipe portion of the storage chamber into the cooling chamber, and the two main pipes are arranged in the back space of the insulating material-filled space Inside, even if the return air duct is arranged in the space filled with a small thermal insulation material, the flow rate of cold air can be properly ensured without reducing the cooling efficiency of the storage room.
  • a convex region protruding rearward is formed at the center in the width direction of the back surface of the inner box, and on the other hand, the two main pipe portions are arranged at positions outside in the width direction compared to the convex region.
  • the two main pipes can be arranged in the insulating material filled space without interfering with the convex area.
  • the return air duct includes at least two of the front-end pipe portions, one of the front-end pipe portions is connected to one of the main pipe portions, the other of the front-end pipe portions is connected to the other of the main pipe portions, and the cold air can be stored in the storage compartment Return to the return air channel Therefore, the storage room can be cooled with a uniform temperature distribution.
  • the two front-end pipe portions are respectively provided on both sides of the storage room, and the cold air can be quickly returned to the return air passage from the position where the temperature distribution deviation is large. Therefore, the storage room can be cooled with a more uniform indoor temperature distribution.
  • a vent hole is used when filling the polyurethane foam into the insulating material filled space
  • the exhaust hole is provided through the back of the inner box, and the insulating material filled space between the two main pipes
  • the space communicates with the storage room through the vent hole, and even if a space where air is likely to remain is formed between the two main pipe portions, when the polyurethane foam is filled, the space can be effectively exhausted from the space filled with the insulating material. Therefore, it is possible to prevent the thermal insulation material from filling the space with residual gas and causing a reduction in the thermal insulation performance of the refrigerator.
  • FIG. 1 is a side vertical sectional view of the refrigerator according to this embodiment
  • FIG. 2 is an enlarged rear view of the refrigerator according to this embodiment, showing a state after the outer box and the heat insulating material are removed;
  • FIG. 3 is a front perspective view (FIG. 3a) and a rear perspective view (FIG. 3b) of the return air duct according to this embodiment.
  • Refrigerator 2. Heat insulation box; 2a, outer box; 2b, inner box; 2c, heat insulation material; 2S, heat insulation material filled space; 3, refrigerator room; 4. vegetable room; 5. freezing room; 10, cooling chamber; 11, evaporator; 20, return air duct; 21, front-end pipe section; 22, main pipe section; 63, exhaust hole
  • the refrigerator 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.
  • the “up and down” direction corresponds to the height direction of the refrigerator 1
  • the “left and right” direction corresponds to the width direction of the refrigerator 1
  • the “front and rear” direction corresponds to the depth direction of the refrigerator 1.
  • FIG. 1 is a side vertical sectional view of the refrigerator 1.
  • the refrigerator 1 according to the present embodiment includes a heat-insulating box 2 corresponding to the refrigerator main body.
  • the heat-insulating box 2 includes a plurality of storage rooms, and stores food and the like inside.
  • a plurality of storage rooms correspond to the refrigerator compartment 3, the vegetable compartment 4, and the freezer compartment 5 from top to bottom, respectively.
  • a heat insulation door (not shown) is provided at the opening of the front surface of each storage room of the heat insulation box 2 for opening or closing the openings.
  • the heat insulation door that closes the opening of the refrigerator compartment 3 has its upper and lower right ends rotatably supported by the heat insulation box 2 for opening or closing the opening of the front surface of the refrigerator compartment 3.
  • the heat-insulating door covering the opening of the vegetable compartment 4 can be pulled away from the heat-insulating box 2 in the front-rear direction to open or close the opening of the front surface of the vegetable compartment 4.
  • the heat insulation door covering the opening of the freezing compartment 5 can be pulled apart in the front-rear direction relative to the heat insulation box 2 for opening or closing the opening of the front surface of the freezing compartment 5.
  • the heat insulation box 2 includes an outer box 2a made of steel plate, an inner box 2b made of synthetic resin, and a heat insulation material 2c made of foamed polyurethane (polyurethane foam), and the heat insulation material 2c is filled in the outer box In the gap formed with the inner box, the space filled with the heat insulation material 2c is hereinafter referred to as "heat insulation material filled space 2S".
  • a plurality of heat insulation partition walls are arranged inside the heat insulation box 2.
  • the heat insulation partition wall (the heat insulation partition wall disposed in the space 6a, the heat insulation partition wall disposed in the space 6b) partitions the refrigerator compartment, the vegetable compartment, and the freezer compartment.
  • the first cold air duct 30 is provided on the rear side of the refrigerator compartment 3.
  • the refrigerator 1 is provided behind the vegetable compartment 4 and the freezing compartment 5 with a cooling compartment 10 that houses the evaporator 11, a return air duct 20, a second cold air supply duct 50, and a fan 60.
  • the evaporator 11 is an evaporation device that evaporates the liquid refrigerant circulating inside to absorb heat, thereby cooling the surrounding gas.
  • the first cold air supply duct 30 is a channel for circulating cold air, and the cold air is supplied to the refrigerator compartment 3.
  • the return air passage 20 is a passage through which the cold air flows back from the refrigerator compartment 3 through the vegetable compartment 4 and is introduced into the cooling compartment 10.
  • the second cold air supply duct 50 is also a passage through which cold air is circulated, and this cold air is supplied to the freezer compartment 5.
  • the flow of cold air will be described with reference to FIG. 1.
  • This cold air is used to cool the refrigerator compartment 3, the vegetable compartment 4, the freezing compartment 5, and the like.
  • the cold air cooled by the evaporator 11 flows above the cooling chamber 10 at a negative pressure.
  • the cold air is divided into three branches, one of which flows toward the first cold air blowing duct 30, the other flows toward the cold air blowing outlet 51, the cold air blowing outlet 51 communicates with the freezing compartment 5, and the last one blows the air to the second cold air Road 50 flows.
  • the tributary flow that flows to the first cold air blower 30 passes through the first cold air blower 30 and is supplied to the refrigerator compartment 3 via the cold air outlets 31, 32, and 33 that communicate with the refrigerator compartment 3.
  • the tributary flow flowing to the cold air outlet 51 communicating with the freezing chamber 5 is supplied to the freezing chamber 5 via the cold air outlet 51.
  • the tributary flow flowing to the second cold air blower 50 passes through the second cold air blower 50 and is supplied to the freezer compartment 5 via the cold air outlet 52 communicating with the freezer compartment 5.
  • the cold air supplied to the refrigerator compartment 3 flows toward the bottom of the space, passes through the cold air outlet 34, and then flows toward the back of the vegetable compartment 4, and the cold air outlet 34 communicates the refrigerator compartment 3 with the vegetable compartment 4.
  • the opening 210 arranged at the front end of the return air duct 20 faces the vegetable compartment 4.
  • the cold air flows to the back of the vegetable compartment 4, and then is sucked into the return air duct 20 from the opening 210.
  • the cold air sucked into the return air passage 20 flows from the top to the bottom in the return air passage 20, passes through the communication portion 23 communicating with the cooling chamber 10, and then flows back into the cooling chamber 10. After the cold air flows back to the cooling chamber 10, it is cooled again by the evaporator 11, and then supplied to the refrigerator compartment 3 and the freezing compartment 5 again along the same path. The cold air circulates in the refrigerator 1 in this state.
  • FIG. 2 is an enlarged rear view of the refrigerator 1, and shows a state after the outer case 2a and the heat insulating material 2c are removed.
  • FIG. 3 is a front perspective view (FIG. 3( a )) and a rear perspective view (FIG. 3( b )) of the return air duct 20.
  • the return air duct 20 is provided on the rear side of the inner box 2 b and is installed from the bottom of the vegetable compartment 4 to the bottom of the freezing compartment 5.
  • the return air duct 20 according to the present embodiment includes a front end tube portion 21 having an opening 210, a main pipe portion 22, and a cooling chamber communication portion 23, and the opening 210 faces the storage compartment (vegetable compartment).
  • the return duct 20 includes two front-end pipe portions 21 (21a, 21b), and two main pipe portions 22 (22a, 22b).
  • the number of the front end tube 21 and the main tube 22 is not limited to this.
  • the front end tube portion 21a is connected to the main tube portion 22a.
  • the front end tube portion 21b is connected to the main tube portion 22b.
  • both main pipe portions 22 a and 22 b are connected to the cooling chamber communication portion 23.
  • the main pipe portions 22 a and 22 b are pipes that guide the cool air sucked into the front end pipe portions 21 a and 21 b to the cooling chamber 10.
  • the main pipes 22a and 22b of the present embodiment are flat linear pipes with hollow insides.
  • both the main pipes 22a and 22b are arranged in the back space of the heat-insulating material-filled space 2S.
  • At least two main pipes 22 are provided as channels for introducing cool air into the cooling chamber 10, and even if the space 2S for filling the heat-insulating material is narrow (for example, the depth (thickness) size of the space 2S for filling the heat-insulating material) can be appropriately ensured The circulation of cold air without reducing the cooling efficiency of the storage room.
  • the cold air flows back to the cooling chamber 11 through at least two paths, which can effectively prevent the frost concentrated on a specific part from obstructing the flow of the cold air. Therefore, the circulation of cold air in the return air passage 20 is not hindered, and the cooling efficiency of the storage compartment can be prevented more effectively.
  • the form of the return air duct 20 may be different from that described above.
  • one front-end pipe portion 21 connects two main pipe portions 22a and 22b.
  • including two (or more than two) front-end tube portions 21 allows cold air to be sucked in from multiple locations in the storage compartment, and the temperature distribution in the storage compartment is often not constant By sucking cold air from multiple locations, the storage room can be evenly cooled.
  • the temperature distribution of the cold air can be greatly deviated from The part quickly returns to the return air duct 20, so the indoor temperature distribution becomes more uniform.
  • the rear central region C of the inner box 2 b is formed to protrude rearward (protruding inward in the depth direction of the heat-insulating material filled space 2S)
  • the convex area is used to house the frosting area 61 of the evaporator 11, the area 62 of the fan 60, and the like. Therefore, in order not to interfere with the convex region, the two main pipe portions 22a and 22b are preferably arranged on the outer side in the width direction than the convex region.
  • the main pipe part 22a is arrange
  • the main pipe part 22b is arrange
  • the air present in the thermal insulation material filling space 2S is discharged through the exhaust hole 63, and the exhaust hole 63 is arranged to penetrate the inner box The back central area C of 2b.
  • a plurality of exhaust holes 63 are provided in a vertical and horizontal arrangement in the central region C on the back of the inner box.
  • the thickness of the heat insulating material 2c and the heat insulating material filled space 2S is reduced.
  • the return air duct 20 is arranged here, the front side of the main pipe portion 22 The part contacts or approaches the inner box 2b, and the rear part of the main pipe portion 22 contacts or approaches the outer box 2a. That is, the space (the space sandwiched by the main pipe portions 22a and 22b) is filled with the heat insulating material including the central area C on the back of the inner box, and becomes blocked (or is about to be blocked) by the main pipe portions 22a and 22b on both sides.
  • the space blocked by the main pipe portions 22 a and 22 b communicates inside and outside through the exhaust holes 63. Therefore, as described above, even if the return air duct 20 is arranged in a state where air is likely to remain, the air in the space blocked by the main pipe portions 22a, 22b can be efficiently discharged to the outside. Thereby, no air remains in the space 2S filled with the heat insulation material, and the heat insulation performance of the refrigerator 1 can be prevented from being reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Refrigerator Housings (AREA)

Abstract

一种冰箱，所述冰箱（1）包括：隔热箱体（2），隔热箱体（2）包括外箱（2a）、内箱（2b）、及在所述外箱（2a）与所述内箱（2b）之间进行填充的隔热材料（2c）；储藏室，形成在所述内箱（2b）内；冷却室（10），设置在所述储藏室的后侧，其内收纳有蒸发器（11）；回风道（20），供回流冷气从所述储藏室回流到所述冷却室（10），包括朝向所述储藏室开口的前端管部（21）及至少两个主管部（22），所述主管部（22）将吸入所述前端管部（21）的冷气导入所述冷却室（10），两个所述主管部（22）配置在隔热材料填充空间（2S）的背部空间内。

Description

冰箱 技术领域
本发明涉及一种冰箱。
背景技术
冰箱的储藏室(冷藏室、蔬菜室、冷冻室等)内的冷气通过回风道而回流到蒸发器，所述回风道例如配置在储藏室的背部，且与储藏室连通。回流到蒸发器的回流冷气被再次冷却，并通过冷气送风道而被供给到储藏室。在此，例如所述回风道大多设置在储藏室内的背部空间。
但是，当冰箱具有这种结构时，储藏室的容积会因为配置了回风道而减少。因此，提出了一种冰箱，其回风道并非配置在储藏室的背部空间，而是配置在冰箱隔热箱体的外箱与内箱之间的隔热材料填充空间内。这种结构的冰箱揭示在日本JP特开2012-233688号公报的专利文献中。
日本JP特开2012-233688号公报的专利文献中，公开的冰箱包括：隔热箱体，在外箱与内箱之间填充有隔热材料；冷藏室，形成在所述箱体内；冷冻室，设置在冷藏室下方；制冰室，设置在冷藏室门内，所述冷藏室门用于打开或关闭冷藏室；以及冷气回风道，连通冷冻室与制冰室；且冷气回风道具有如下结构：从冷冻室开始穿过分隔冷冻室与冷藏室的分隔壁，再从柜侧面的隔热材料内部穿过，到达冷藏室的侧壁。
但是，日本JP特开2012-233688号公报的专利文献中，回风道穿过与冷藏室的侧壁相对应的隔热材料后，需要连接蒸发器，而蒸发器配置在冷藏室下方的冷冻室的背部。因此，回风道的路径长，需要遍及冷藏室、分隔壁、以及冷冻室，这将导致产品成本上升。
另一方面，尤其是大型冰箱中，为了增加容积率(冰箱的内容积/外容积)，除了使用聚氨酯泡沫隔热材料外，大多还使用真空隔热材料，所述真空隔热材料以包围冰箱内箱的方式安装。由此，通过减小聚氨酯泡沫的厚度，来增加储藏室的容积。但是，若隔热材料填充空间的厚度减小，则难以确保回风道的容积可以流通足够多的冷气。当回风道无法流通足够多的冷气时，储藏室的冷却效率降低。但是，日本JP特开2012-233688号公报的专利文献中，对于这样的问题，并没有任何公开及揭示。
发明内容
鉴于以上情况，本发明的目的在于提供一种包括回风道的冰箱，其回风道具有如下结构：即使像所述那样将回风道配置在厚度小的隔热材料填充空间内，也能适当地确保冷气的流通量，而不会降低储藏室的冷却效率。
为了解决所述问题，本发明所涉及的冰箱包括：隔热箱体，包括外箱、内箱、及隔热材料， 所述隔热材料填充在外箱与内箱之间形成的隔热材料填充空间内；
储藏室，形成在内箱内；
冷却室，设置在储藏室的背部，收纳蒸发器；以及
回风道，连通储藏室与冷却室，流动从储藏室回流到蒸发器回流冷气；且
所述回风道包括：朝向储藏室开口的前端管部、以及至少两个主管部，所述主管部将吸入所述前端管部的冷气导入冷却室；
所述两个主管部配置在所述隔热材料填充空间的背部空间内。
此外，本发明所涉及的冰箱中，在所述内箱背面的宽度方向中央处，形成有向后侧突出的凸状区域，所述两个主管部相比所述凸状区域均配置在宽度方向上的外侧位置。
此外，本发明所涉及的冰箱中，所述回风道包括至少两个所述前端管部，所述两个前端管部的其中一个连接所述两个主管部的其中一个，所述两个前端管部的另一个连接所述两个主管部的另一个。
此外，本发明所涉及的冰箱中，所述两个前端管部分别设置在储藏室的两侧部。
此外，本发明所涉及的冰箱中，所述隔热材料是聚氨酯泡沫；贯穿所述内箱背面设置排气孔，在将聚氨酯泡沫填充至隔热材料填充空间时使用；在所述隔热材料填充空间内，被所述两个主管部夹着的空间通过所述排气孔连通于储藏室。
根据本发明，提供一种冰箱，其回风道包括至少两个主管部，将吸入朝向储藏室的前端管部中的冷气导入冷却室，两个主管部配置在隔热材料填充空间的背部空间内，即使在狭小的隔热材料填充空间内配置回风道，也能适当地确保冷气的流通量，而不会降低储藏室的冷却效率。
此外，根据本发明，在内箱背面的宽度方向中央处，形成向后侧突出的凸状区域，另一方面，两个主管部相比所述凸状区域配置在宽度方向上的外侧位置，两个主管部可以配置在隔热材料填充空间内，而不会干涉凸状区域。
此外，根据本发明，回风道包括至少两个所述前端管部，前端管部的其中一个连接主管部的其中一个，前端管部的另一个连接主管部的另一个，冷气可以由储藏室的多个部位回流到回风道。因此，能以均匀的温度分布来冷却储藏室。
此外，根据本发明，两个前端管部分别设置在储藏室的两侧部，冷气可以从温度分布偏差较大的部位快速回流到回风道。因此，能以更均匀的室内温度分布来冷却储藏室。
此外，根据本发明，将聚氨酯泡沫填充到隔热材料填充空间时使用排气孔，排气孔贯穿所述内箱背面设置，所述隔热材料填充空间内所述两个主管部之间的空间通过排气孔而与储藏室连通，即使两个主管部之间形成容易残留空气的空间，在填充聚氨酯泡沫时也能从隔热材料填充空间有效地排气。因此，可以防止隔热材料填充空间内残留气体而导致冰箱隔热性能降低的情况。
附图说明
图1是本实施方式所涉及的冰箱的侧视垂直剖视图；
图2是本实施方式所涉及的冰箱的放大后视图，表示将外箱及隔热材料拆下后的状态；
图3是本实施方式所涉及的回风道的正面立体图(图3a)及背面立体图(图3b)。
标号说明：
1，冰箱；2，隔热箱体；2a，外箱；2b，内箱；2c，隔热材料；2S，隔热材料填充空间；3，冷藏室；4，蔬菜室；5，冷冻室；10，冷却室；11，蒸发器；20，回风道；21，前端管部；22，主管部；63，排气孔
具体实施方式
以下，参考附图详细地说明本发明的一实施方式所涉及的冰箱1。另外，说明本实施方式所涉及的冰箱1时，“上下”方向对应于冰箱1的高度方向，“左右”方向对应于冰箱1的宽度方向，“前后”方向对应于冰箱1的深度方向。
首先，参考图1来说明本实施方式所涉及的冰箱1的整体结构。在此，图1是冰箱1的侧视垂直剖视图。如图1所示，本实施方式所涉及的冰箱1包括隔热箱体2，所述隔热箱体2相当于冰箱主体。隔热箱体2包括多个储藏室，内部储藏食品等。此外，虽然没有做出限定，但多个储藏室从上到下分别对应冷藏室3、蔬菜室4及冷冻室5。
在隔热箱体2的各个所述储藏室的前表面的开口，设置隔热门(未图示)，用于打开或关闭所述各开口。其中，在冰箱前视图中，将冷藏室3的开口关闭的隔热门，其右端的上下端部可转动地被隔热箱体2支承，用于打开或关闭冷藏室3的前表面的开口。此外，覆盖蔬菜室4的开口的隔热门，可相对于隔热箱体2在前后方向被拉开，用于打开或关闭蔬菜室4的前表面的开口。类似地，覆盖冷冻室5的开口的隔热门，可相对于隔热箱体2在前后方向被拉开，用于打开或关闭冷冻室5的前表面的开口。
此外，隔热箱体2包括钢板制成的外箱2a、合成树脂制成的内箱2b、及发泡聚氨酯(聚氨酯泡沫)制成的隔热材料2c，所述隔热材料2c填充在外箱与内箱之间形成的间隙内，以下将填充隔热材料2c的空间称为“隔热材料填充空间2S”。
隔热箱体2的内部配置有多个隔热分隔壁。利用该隔热分隔壁(配置在空间6a的隔热分隔壁、配置在空间6b的隔热分隔壁)来分隔冷藏室、蔬菜室、冷冻室。
此外，本实施方式所涉及的冰箱1中，在冷藏室3的后侧设置第一冷气送风道30。此外，冰箱1在蔬菜室4及冷冻室5的后侧设置内部收纳蒸发器11的冷却室10、回风道20、第二冷气送风道50、以及风扇60。在此，蒸发器11是一种蒸发设备，使内部流通的液状制冷剂蒸发来吸 热，从而冷却周围的气体。
所述第一冷气送风道30是流通冷气的通道，此冷气被供给至冷藏室3。此外，回风道20是在冷气由冷藏室3经蔬菜室4回流后将其导入冷却室10的通道。此外，第二冷气送风道50也是流通冷气的通道，此冷气被供给至冷冻室5。
参考图1来说明冷气的流动，此冷气用于冷却冷藏室3、蔬菜室4、冷冻室5等。如图1中的箭头所示，当风扇60运行时，被蒸发器11冷却的冷气向处于负压的冷却室10的上方流动。然后，冷气被分成三个支流，其中一个向第一冷气送风道30流动，另一个向冷气吹出口51流动，所述冷气吹出口51与冷冻室5连通，最后一个向第二冷气送风道50流动。
向第一冷气送风道30流动的支流，流过第一冷气送风道30后，经由与冷藏室3连通的冷气吹出口31、32、33而被供给至冷藏室3。此外，向与冷冻室5连通的冷气吹出口51流动的支流，经由冷气吹出口51被供给至冷冻室5。此外，向第二冷气送风道50流动的支流，流过第二冷气送风道50后，经由与冷冻室5连通的冷气吹出口52而被供给至冷冻室5。
供给至冷藏室3的冷气向该空间的底部流动，通过冷气吹出口34后，向蔬菜室4的背部流动，所述冷气吹出口34将冷藏室3与蔬菜室4连通。在此，配置在所述回风道20的前端的开口210朝向蔬菜室4。冷气流动到蔬菜室4的背部，然后从所述开口210被吸入到回风道20内。
被吸入回风道20内的冷气在回风道20内从上往下流动，通过与冷却室10连通的连通部23后，回流到冷却室10内。冷气回流到冷却室10后，被蒸发器11再次冷却，然后按照相同的路径再次被供给至冷藏室3、冷冻室5。冷气以这种状态在冰箱1内循环。
其次，参考图2及图3，说明回风道20的结构及配置情况。在此，图2是冰箱1的放大后视图，表示拆下外箱2a及隔热材料2c后的状态。此外，图3是回风道20的正面立体图(图3(a))及、背面立体图(图3(b))。
如图2所示，回风道20设置在内箱2b的后侧，从蔬菜室4的底部一直安装到冷冻室5的底部。本实施方式所涉及的回风道20包括：具有开口210的前端管部21、主管部22、及冷却室连通部23，所述开口210朝向所述储藏室(蔬菜室)。回风道20包括两个前端管部21(21a、21b)，以及两个主管部22(22a、22b)。但是，前端管部21与主管部22的数量并不限定于此。
前端管部21a连接于主管部22a。类似地，前端管部21b连接于主管部22b。此外，优选为两个主管部22a、22b都连接于冷却室连通部23。
在此，主管部22a、22b是将前端管部21a、21b吸入的冷气导向冷却室10的管路。虽然没有做出限定，但本实施方式的主管部22a、22b是内部中空的扁平直线状管路。此外，两个主管部22a、22b均配置在隔热材料填充空间2S的背部空间内。
像这样，至少设置两个主管部22作为将冷气导入冷却室10的通道，即使隔热材料填充空间2S狭小(例如隔热材料填充空间2S的深度(厚度)尺寸小)，也能适当地确保冷气的流通量，而不会降低储藏室的冷却效率。
此外，如上所述冷气至少通过两个路径回流到冷却室11，可以有效地防止集中在特定部位结霜而阻碍冷气流动的情况。因此不会阻碍冷气在回风道20内的流通，可以更有效地防止储藏室的冷却效率降低。
另外，回风道20的形态也可以与所述不同，例如一个前端管部21连接两个主管部22a、22b。但是，如图2及图3所示，包括两个(或两个以上)前端管部21，可以使冷气从储藏室的多个部位被吸入，储藏室内的温度分布大多情况下是不固定的，通过从多个部位吸入冷气，可以均匀地冷却储藏室。
此外，如图2及图3所示，通过使两个前端管部21a、21b的各开口210a、210b，朝向储藏室(蔬菜室4)背部的两侧部，冷气可以由温度分布偏差较大的部位快速回流到回风道20，因此，室内温度分布变得更均匀。
但是，如图2所示，根据蒸发器11、风扇60的配置关系，在内箱2b的背面中央区域C，形成有向后侧突出(向隔热材料填充空间2S的深度方向内侧突出)的凸状区域，用于收纳蒸发器11的结霜区域61、风扇60的区域62等。因此，为了不干涉该凸状区域，两个主管部22a、22b相比凸状区域优选配置在靠宽度方向上的外侧位置。更详细来说，主管部22a相比凸状区域配置在图2的更左侧，另一方面，主管部22b相比凸状区域配置在图2的更右侧。
此外，在本实施方式中，将隔热材料聚氨酯泡沫填充至隔热材料填充空间2S时，隔热材料填充空间2S内存在的空气通过排气孔63排出，排气孔63配置为贯穿内箱2b的背面中央区域C。更详细来说，如图2所示，在内箱背面中央区域C，以纵横排列的方式设置多个排气孔63。
如上所述，尤其在大型冰箱的情况下，为了提高容积率而减小隔热材料2c与隔热材料填充空间2S的厚度，若在此处配置回风道20，则主管部22的前侧部位接触或接近内箱2b，且主管部22的后侧部位接触或接近外箱2a。即，包括内箱背面中央区域C在内的隔热材料填充空间(被主管部22a、22b夹着的空间)，变成被两侧主管部22a、22b阻隔(或快要阻隔)的状态。因此，向隔热材料填充空间2S填充隔热材料2c时，空气容易残留。若隔热材料填充空间2S内残留空气，则隔热材料2c无法到达残留空气的部分，导致隔热性能降低。
但是，本实施方式所涉及的冰箱1中，如上所述，被主管部22a、22b阻隔的空间通过排气孔63而内外连通。因此，如上所述，即使在容易残留空气的状态下配置回风道20，被主管部22a、22b阻隔的空间内的空气也能有效地向外排出。由此，隔热材料填充空间2S内不会残留空气， 可防止冰箱1的隔热性能降低。
以上，对本发明的实施方式进行了详细说明。但，所述说明是为了容易理解本发明而描述的，并不意图限定本发明的主旨。本发明在不脱离其主旨的情况下包含各种变更、改良。此外，本发明包含等效发明。

Claims (10)

  1. 一种冰箱，其特征在于，包括：
    隔热箱体，包括外箱、内箱、及隔热材料，所述外箱与所述内箱之间形成隔热材料填充空间，所述隔热材料填充在所述隔热材料填充空间内；
    储藏室，形成在所述内箱内；
    冷却室，设置在所述储藏室的后侧，收纳有蒸发器；以及
    回风道，将所述储藏室与所述冷却室连通，流动有从所述储藏室回流到蒸发器的回流冷气；且
    所述回风道包括：前端管部及至少两个主管部，所述前端管部朝向所述储藏室进行开口，所述主管部将吸入所述前端管部的冷气导入所述冷却室，
    所述两个主管部配置在所述隔热材料填充空间的背部空间内。
  2. 根据权利要求1所述的冰箱，其特征在于，在所述内箱背面的宽度方向中央处，形成有向后侧突出的凸状区域，
    所述两个主管部相比所述凸状区域配置在宽度方向上的外侧位置。
  3. 根据权利要求1所述的冰箱，其特征在于，所述回风道包括至少两个所述前端管部，
    所述两个前端管部的其中一个连接所述两个主管部的其中一个，
    所述两个前端管部的另一个连接所述两个主管部的另一个。
  4. 根据权利要求3所述的冰箱，其特征在于，
    所述两个前端管部分别设置在所述储藏室的两侧部。
  5. 根据权利要求1～4中任一项所述的冰箱，其特征在于，所述隔热材料是聚氨酯泡沫；贯穿所述内箱背面设置排气孔，在将所述聚氨酯泡沫填充至所述隔热材料填充空间时使用，
    在所述隔热材料填充空间内，被所述两个主管部夹着的空间通过所述排气孔连通于所述储藏室。
  6. 根据权利要求5所述的冰箱，其特征在于，所述主管部的前侧部位接触所述内箱，所述主管部的后侧部位接触所述外箱。
  7. 根据权利要求5所述的冰箱，其特征在于，在所述内箱背面以纵横排列的方式设置有多个所述排气孔。
  8. 根据权利要求2所述的冰箱，其特征在于，在所述冰箱的宽度方向上，两个所述主管部分别位于所述凸状区域的两侧。
  9. 根据权利要求1所述的冰箱，其特征在于，两个所述主管部分别设置为在所述冰箱的高度方向上从上往下延伸的扁平直线状管路。
  10. 一种冰箱，其特征在于，包括：
    隔热箱体，包含外箱、内箱、及隔热材料，所述外箱与所述内箱之间形成隔热材料填充空间，所述隔热材料填充在所述隔热材料填充空间内；
    储藏室，形成在所述内箱内；
    冷却室，设置在所述储藏室的后侧，收纳有蒸发器；以及
    回风道，将所述储藏室与所述冷却室连通，流动有从所述储藏室回流到所述冷却室的回流冷气；且
    所述回风道包括前端管部及至少两个主管部，所述前端管部朝向所述储藏室开口，所述主管部将吸入所述前端管部的冷气导入所述冷却室，两个所述主管部配置在所述隔热材料填充空间内。
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