WO2022037437A1 - 蒸发器设置于箱体底部的风冷冰箱 - Google Patents

蒸发器设置于箱体底部的风冷冰箱 Download PDF

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Publication number
WO2022037437A1
WO2022037437A1 PCT/CN2021/111718 CN2021111718W WO2022037437A1 WO 2022037437 A1 WO2022037437 A1 WO 2022037437A1 CN 2021111718 W CN2021111718 W CN 2021111718W WO 2022037437 A1 WO2022037437 A1 WO 2022037437A1
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WO
WIPO (PCT)
Prior art keywords
evaporator
air
frost
heating wire
return
Prior art date
Application number
PCT/CN2021/111718
Other languages
English (en)
French (fr)
Inventor
苗建林
刘会
董凌云
王铭
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
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 青岛海尔电冰箱有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔电冰箱有限公司
Priority to US18/020,970 priority Critical patent/US20230288121A1/en
Priority to EP21857532.2A priority patent/EP4180748A4/en
Priority to AU2021329695A priority patent/AU2021329695B2/en
Publication of WO2022037437A1 publication Critical patent/WO2022037437A1/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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • 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
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/12—Insulation with respect to heat using an insulating packing material
    • F25D2201/128—Insulation with respect to heat using an insulating packing material of foil type
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans

Definitions

  • the invention relates to the field of household appliances, in particular to an air-cooled refrigerator with an evaporator arranged at the bottom of a box body.
  • the existing bottom-mounted evaporator is placed horizontally.
  • a cover plate is generally added to the upper part of the evaporator and the fan.
  • the cover plate should fit the evaporator as much as possible.
  • an insulating layer needs to be set under the cover plate.
  • the cover plate assembly of the evaporator is composed of a cover plate and an insulating layer.
  • the cover plate assembly is completely fitted to the evaporator. After the evaporator is frosted, it is easy to cause frost blocking, which will reduce the actual cooling efficiency of the evaporator, the defrosting cycle is short, and the energy consumption of the whole machine is high.
  • frost blocking For the bottom-mounted evaporator structure, the return air outlet of the freezer compartment is located between the door body and the evaporator, and the evaporator will be blocked by frost, which will cause the phenomenon of poor return air and affect the overall cooling effect.
  • An object of the present invention is to provide an air-cooled refrigerator with an evaporator disposed at the bottom of the box which can solve any of the above problems.
  • a further object of the present invention is to improve the air return structure and improve the refrigeration effect of the refrigerator.
  • Another further object of the present invention is to improve the structure of the cooling chamber and reduce the frosting phenomenon of the evaporator.
  • the present invention provides an air-cooled refrigerator in which the evaporator is arranged at the bottom of the box body, the refrigerator includes: a box body with a bottom inner tank; The inner space of the gallbladder is divided into a cooling room and a storage space, and the cooling room is located below the storage space; the air return hood is arranged at the front of the cooling room, the top of which is connected to the front end of the partition cover, and the return air cover is on the There is at least one front air return port connecting the cooling chamber and the storage space, and the front air return port is used to provide the air required for heat exchange to the cooling chamber; The front part of the top surface of the evaporator, the partition cover plate and the air return hood define a frost accommodating space, so that a part of the air entering from the front air return port enters the evaporator from the frost accommodating space.
  • the refrigerator further includes a top heating wire, which is disposed at least at the front of the top surface of the evaporator, and is configured to provide the evaporator with heat required for defrosting.
  • the refrigerator further includes: an evaporator insulation member, which is arranged between the partition cover and the top of the evaporator, and includes: a filling part, which is filled between the partition cover and the top surface of the evaporator at the rear of the frost storage space.
  • the heating wire limit part extends forward from the filling part and has at least one convex rib protruding downward, so that the top heating wire is pressed against the top surface of the evaporator by the convex rib.
  • protruding ribs there are a plurality of protruding ribs, and they are respectively located at the middle of the top heating wire and above the two sides of the lateral direction.
  • the evaporator heat insulating member is formed by stacking multiple layers of heat insulating layers of different materials in turn, and the heat insulating layer includes: a heat insulating foam layer, which is placed against the lower surface of the partition cover; a resin film layer, which is placed against the lower surface of the heat insulating foam layer. Setting; the metal uniform temperature layer is arranged on the outer side of the resin film layer and is in conflict with the top heating wire.
  • the bottom wall of the bottom liner is also provided with a water receiving groove, and the bottom of the water receiving groove is provided with a drain; and the air-cooled refrigerator also includes: a water receiving tray, which is arranged between the evaporator and the bottom wall of the bottom liner, It is configured to receive the water on the evaporator, and a plurality of through holes are arranged in the area opposite the water receiving tray and the water receiving groove; and the bottom heating wire is coiled and arranged between the water receiving tray and the evaporator, and is configured to provide defrosting for the evaporator. heat.
  • the bottom heating wire also includes: a front expansion section, extending from the bottom of the evaporator to the front of the evaporator, for heating and defrosting the frost falling from the frost-receiving space during defrosting.
  • the power density of the front expansion section is set to be less than or equal to 10w/m.
  • the air return hood is provided with: the first front air return port, which is horizontally opened on the upper part of the air return hood; the second front air return port is horizontally opened in the lower part of the air return hood, so that the air in the storage space can flow from the upper and lower sides. Zone flow to evaporator
  • an air duct backboard which is arranged in front of the rear wall of the bottom liner, and defines an air supply air duct with the rear wall of the bottom liner, and the air duct backboard is provided with at least one air supply port for sending air.
  • the air outlet is used to connect the air supply air duct and the storage space;
  • the cooling fan is arranged behind the evaporator, and its air outlet is connected to the lower end of the air supply air duct, and is configured to promote the formation of a front return air outlet that flows into the evaporator and then sends it to the Cooling airflow from the supply duct.
  • the evaporator of the present invention is arranged in the air-cooled refrigerator at the bottom of the box body, and a frost accommodating space is defined at the front of the top surface of the evaporator, the partition cover and the air return hood, so that part of the air entering from the front air return port can be contained
  • the frost space enters the evaporator.
  • the frost-receiving space changes the deflection angle of the original return air flow, so that the return air flow preferentially passes through the frost-receiving space with smaller flow resistance and then passes through the evaporator, which avoids the effect of frost on the air flow in the evaporator and improves the heat exchange efficiency. , to further improve the refrigeration effect of the refrigerator.
  • the evaporator of the present invention is arranged in an air-cooled refrigerator at the bottom of the box body, and a top heating wire is arranged at the front of the top surface of the evaporator.
  • the frost-receiving space makes the frosting position shift from the front of the evaporator to the frost-receiving space
  • the top heating wire is centrally arranged in the front of the top of the evaporator to avoid the heat of the heating wire during defrosting from affecting the cooling work of the evaporator, and optimizes the refrigerator.
  • the defrosting structure further improves the refrigeration efficiency of the refrigerator and saves energy consumption.
  • the evaporator of the present invention is arranged in the air-cooled refrigerator at the bottom of the box body, and the heating wire limit part restricts the top heating wire to the top surface of the evaporator.
  • the metal uniform temperature layer is in contact with the top heating wire, which can effectively transfer energy and prevent the local temperature of the top heating wire from being too high.
  • the above arrangement simplifies the restriction structure of the top heating wire, does not add an aluminum plate, and only fixes the top heating wire through the evaporator heat insulating member, which improves the safety, the structure is simplified, and the installation is convenient.
  • FIG. 1 is a schematic front view of a box in an air-cooled refrigerator with an evaporator disposed at the bottom of the box according to an embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view taken along section line A-A in Figure 1;
  • FIG. 3 is a schematic cross-sectional view of the bottom of the box body of the air-cooled refrigerator in which the evaporator shown in FIG. 2 is arranged at the bottom of the box body;
  • FIG. 4 is a schematic partial enlarged view of region B shown in FIG. 3 , which shows the heating wire limiting part of the heat preservation member of the evaporator;
  • FIG. 5 is a schematic partial enlarged view of the C area shown in FIG. 3, wherein the air return hood and the frost-receiving space are shown;
  • Fig. 6 is a schematic exploded view of the bottom of the box body of the refrigerator shown in Fig. 2;
  • FIG. 7 is a schematic structural diagram of a heating wire limiting portion of the refrigerator shown in FIG. 6;
  • FIG. 8 is a schematic structural diagram of the bottom heating wire of the refrigerator shown in FIG. 6;
  • FIG. 9 is a schematic structural diagram of the air return hood of the refrigerator shown in FIG. 6 .
  • FIG. 1 is a schematic front view of an air-cooled refrigerator with an evaporator disposed at the bottom of a box according to an embodiment of the present invention.
  • FIG. 2 is a schematic side sectional view of the air-cooled refrigerator shown in FIG. 1 .
  • a refrigerator may generally include a box body 10 including an outer shell, an inner container, and other accessories.
  • the outer shell is the outer structure of the refrigerator and protects the entire refrigerator.
  • the inner liner can be divided into one or more, and the inner liner can be divided into refrigerating inner liner, temperature-changing inner liner, and freezing inner liner according to the function.
  • the specific number of inner liner and function can be configured according to the use requirements of the refrigerator.
  • the inner container at least includes a bottom inner container 110, and the bottom inner container 110 can generally be a frozen inner container.
  • a press room 500 is limited behind the bottom of the box 10 .
  • the refrigerator in the embodiment shown in FIGS. 3-9 is provided with a partition cover 120 .
  • the partition cover 120 is laterally disposed in the bottom inner pot 110 for dividing the inner space of the bottom inner pot 110 into a cooling chamber 100 and a storage space 200 , and the cooling chamber 100 is located below the storage space 200 .
  • the front part of the cooling chamber 100 is provided with a return air cover 170 , the top of the return air cover 170 is connected to the front end of the partition cover 120 , and the return air cover 170 is provided with at least one front air return port connecting the cooling room 100 and the storage space 200 , the air required for heat exchange is provided to the cooling chamber 100 by using the front air return port.
  • the evaporator 20 in this embodiment is in the shape of a flat cuboid, and is installed in the cooling chamber 100 inclined upward from front to back, wherein the front of the top surface of the evaporator 20, the partition cover 120 and the air return cover 170 define a frost container space 400 so that a part of the air entering from the front air return port enters the evaporator 20 from the frost storage space 400 .
  • the frost-receiving space 400 changes the deflection angle of the original return air flow, so that the return air flow preferentially passes through the frost-receiving space 400 with a smaller flow resistance and then passes through the evaporator 20, which avoids the effect of frost on the air flow in the evaporator 20, and improves the exchange rate.
  • the thermal efficiency further improves the refrigeration effect of the refrigerator.
  • the refrigerator of this embodiment further includes a top heating wire 140 .
  • the top heating wire 140 is disposed at least at the front of the top surface of the evaporator 20 and is configured to provide the evaporator 20 with heat required for defrosting. That is, in some embodiments, the top heating wire 140 may be provided only at the front of the top surface of the evaporator 20 (or it may be described as the top heating wire 140 may only be provided in the area of the frost storage space), which is convenient for the centralized arrangement of the heating wires. Defrost. It can not only improve the defrosting effect, but also prevent the hot air from overflowing to the storage space 200 .
  • the top heating wire 140 may cover the entire top surface of the evaporator 20 , and the density of the top heating wire 140 is adjusted according to the different defrosting heat required for different positions on the top surface of the evaporator 20 .
  • the density of the top heating wires 140 arranged near the top front of the evaporator 20 is the highest, and decreases in sequence, providing sufficient heat for the frost storage space 400 at the front of the evaporator 20, but the provided heat does not affect the normal operation of the evaporator 20.
  • the power and actual temperature of the top heating wire 140 can be set in sections, and the temperature does not exceed 80 degrees, which effectively improves the safety level and ensures the defrosting effect.
  • the frosting position is transferred from the front of the evaporator 20 to the frost containing space 400, which is convenient for the centralized arrangement of heating wires for defrosting.
  • the heated air flow rises, is blocked by the partition cover 120 , and gathers in the frost holding space 400 . It can not only improve the defrosting effect, but also prevent the hot air from overflowing to the storage space 200, thereby improving the fresh-keeping effect.
  • An evaporator heat preservation member 130 is provided between the partition cover plate 120 and the top of the evaporator 20 .
  • the arrangement of the evaporator heat preservation member 130 can reduce the heat loss of the evaporator 20 and reduce frost or even ice formation on the surface of the evaporator 20 .
  • the cold energy on the surface of the evaporator 20 of the refrigerator tends to diffuse toward the storage space 200 , resulting in that the temperature of the bottom region of the storage space 200 is significantly lower than the temperature of other parts of the storage space 200 .
  • the temperature distribution is uneven, and the use of the evaporator heat insulating member 130 in this embodiment avoids the occurrence of the above problems.
  • the evaporator heat preservation member 130 can also prevent the temperature of the storage space 200 from rising due to heat diffusion, that is, avoid energy loss and affect the storage quality.
  • the evaporator heat insulating member 130 is formed by successively stacking multiple heat insulating layers of different materials.
  • the thermal insulation layer includes a thermal insulation foam layer 1301 , a resin film layer 1302 and a metal temperature uniform layer 1303 .
  • the thermal insulation foam layer 1301 is disposed against the lower surface of the partition cover plate 120 .
  • the thermal insulation foam layer 1301 is light in weight and has a certain structural strength, and is disposed on the lower surface of the partition cover plate 120 to prevent the storage space 200 from impacting the box 10 by placing large items in the storage space 200 .
  • the resin film layer 1302 is disposed against the lower surface of the thermal insulation foam layer 1301 .
  • the resin film layer 1302 may be provided as a polyethylene film (PE film).
  • PE film polyethylene film
  • the specific gravity of the polyethylene film is light, the coverage is easy, and the shrinkage of the polyethylene film can closely adhere to the upper or lower insulation layer, so that the insulation layer is tightly connected, and the integrity is strong and difficult to separate.
  • the polyethylene film is non-toxic and harmless, waterproof and antibacterial, durable and suitable for the use environment of refrigerators.
  • the metal temperature uniform layer 1303 is disposed on the outer side of the resin film layer 1302 and is opposite to the top of the evaporator 20 .
  • the metal uniform temperature layer 1303 may be provided as an aluminum foil.
  • the aluminum foil has good ductility, which can minimize the thickness of the metal temperature uniform layer 1303 to prevent occupying too much interior space of the refrigerator, and has excellent thermal conductivity, which can uniform the temperature of the top of the evaporator 20 and avoid the temperature of the storage space 200 above the evaporator 20. The problem of uneven distribution occurs.
  • the evaporator insulation member 130 includes a filling portion 131 and a heating wire limiting portion 132 .
  • the filling part 131 is filled in the area behind the frost storage space 400 between the partition cover 120 and the top surface of the evaporator 20 .
  • the heating wire limiting portion 132 extends forward from the filling portion 131 and has at least one convex rib 1320 protruding downward, so that the top heating wire 140 is pressed against the top surface of the evaporator 20 by the convex rib 1320 .
  • There are a plurality of protruding ribs 1320 and they are respectively located in the middle of the top heating wire 140 in the lateral direction and above the two sides in the lateral direction, so as to fix the top heating wire 140 more stably.
  • the heating wire limiting portion 132 is made of a mountain-shaped structure, and the middle of the top heating wire 140 is limited to the top surface of the evaporator 20. Since the evaporator heat preservation member 130 is provided with a metal temperature uniform layer 1303, the metal temperature uniform layer 1303 is connected to the top heating wire. 140 contacts, which can effectively transfer energy and prevent the local temperature of the top heating wire 140 from being too high.
  • the above arrangement simplifies the restriction structure of the top heating wire 140, does not add an aluminum plate, and only fixes the top heating wire 140 through the evaporator heat insulating member 130, which improves safety, has a simplified structure and is convenient to install.
  • a water receiving groove 111 is also opened on the bottom wall of the bottom inner tank 110 , and a drain port 112 is formed at the bottom of the water receiving groove 111 .
  • the water outlet 112 guides the defrosting water generated by defrosting into the evaporating pan 510 in the compressor room 500 .
  • the air-cooled refrigerator may further include a water receiving tray 160 .
  • the water receiving tray 160 is arranged between the evaporator 20 and the bottom wall of the bottom inner tank 110, and is configured to receive the water on the evaporator 20, and a plurality of through holes are provided in the area opposite the water receiving tray 160 and the water receiving groove 111. The through hole is used to guide the defrosting water generated by defrosting into the water receiving tray 160 .
  • the refrigerator of this embodiment is further provided with a bottom heating wire 150 .
  • the bottom heating wire 150 is coiled and arranged between the water receiving tray 160 and the evaporator 20 , and is configured to provide heat for defrosting the evaporator 20 .
  • the bottom heating wire 150 further includes: a front expansion section 151, which extends from the bottom of the evaporator 20 to the front of the evaporator 20, and is used for heating and defrosting the frost falling from the frost-receiving space 400 during defrosting. During the defrosting process, the frost ice dropped from the frost containing space 400 is melted away by the front expansion section 151 of the bottom heating wire 150 .
  • the bottom heating wire 150 and the water receiving tray 160 are fixed to each other to ensure uniform heat transfer, and the water receiving tray 160 can also play a role of safety protection during transportation.
  • the power density of the front expansion section 151 does not exceed 10w/m, because less heat is required here, so the safety level can be effectively improved according to this design.
  • the power of the bottom heating wire 150 and the top heating wire 140 is designed on demand, which can ensure the defrosting effect while reducing the waste of energy and the temperature rise of the freezing compartment, thereby facilitating the improvement of the preservation effect of the freezing compartment.
  • the air return cover 170 of this embodiment is provided with a first front air return port 177 and a second front air return port 178 .
  • the first front air return port 177 is laterally opened at the upper portion of the air return cover 170 .
  • the second front air return port 178 is laterally opened at the lower portion of the air return hood 170 , so that the air in the storage space 200 flows from the upper and lower regions to the evaporator 20 .
  • the air return cover 170 may include a first board surface 171, a second board surface 172, a third board surface 173, a fourth board surface 174, a fifth board surface 175, and a frame 176.
  • the first plate surface 171 is inclined downward from the front end of the partition cover plate 120 and extends from the rear to the front.
  • the second plate surface 172 is inclined downward from the front end of the first plate surface 171 and extends downward from the front to the rear, so as to be recessed in the direction of the cooling chamber 100 .
  • the first front air return port 177 is opened on the second board surface 172 .
  • the first front air return port 177 is formed by grid holes opened on the second plate surface 172 .
  • the structure of the air return hood 170 in the prior art is likely to cause uneven distribution of the air volume of the return air, and airflow accumulation occurs in the area near the air return port (such as the front end of the upper cover of the return air hood and the inner bend of the upper cover of the return air hood), which affects the return air flow. wind efficiency. Since the second plate surface 172 of the air return cover 170 in this embodiment is inclined inward, the arrangement position of the first front air return port 177 also extends toward the direction of the cooling chamber 100 .
  • the airflow When the airflow passes through the first plate surface 171, the airflow can be guided downward because the first plate surface 171 is inclined downward.
  • the airflow flows through the angle formed by the first plate surface 171 and the second plate surface 172 into the cooling chamber 100, it will enter the cooling chamber 100 evenly along with the eddy current existing in the angle, which solves the problem of uneven distribution and accumulation of air volume. It improves the return air efficiency and makes the return air smoother.
  • a grid is formed at the front air return port, and the grid holes are in the shape of vertical bars, which are distributed in sequence in the lateral direction, and the return air is dispersed, so that the return air can enter the upper section of the evaporator 20 more uniformly.
  • the first front air return port 177 is substantially flush with the top surface of the evaporator 20 in the vertical direction, so that the airflow entering the cooling chamber 100 from the first front air return port 177 can uniformly exchange heat with the evaporator 20 .
  • a frost-holding space 400 is provided at the front of the evaporator 20, which changes the deflection angle of the original return air flow, so that the air flow preferentially passes through the frost-holding space 400 with a smaller flow resistance.
  • the heat exchange is more uniform.
  • the outside air of the box 10 entering from the first front air return port 177 is frosted in the frost holding space 400 after contacting the surface of the cooler evaporator 20 .
  • the top heating wire 140 provided on the top surface of the evaporator 20 is the front part of the evaporator 20
  • the frost holding space 400 provides enough heat for defrosting, but the provided heat does not affect the normal operation of the evaporator 20 .
  • the third plate surface 173 is inclined downward from the rear end of the second plate surface 172 and extends from the rear to the front, so as to protrude forward.
  • the fourth plate surface 174 extends obliquely downward from the front to the rear from the front end of the third plate surface 173 so as to be recessed toward the cooling chamber 100 .
  • the fifth board surface 175 continues to extend backward and downward from the rear end of the fourth board surface 174 .
  • the second front air return port 178 is formed between the fifth plate surface 175 and the frame 176 , and the projection of the second front air return port 178 in the vertical direction is substantially flush with the middle of the evaporator 20 , so that the air entering the cooling chamber 100 from the second front air return port 178 The airflow can uniformly exchange heat with the evaporator 20 .
  • the air-cooled refrigerator of this embodiment may further include an air duct backplane 180 .
  • the air duct back plate 180 is arranged in front of the rear wall 113 of the bottom inner pot 110, and defines an air supply air duct 300 with the rear wall 113 of the bottom inner pot 110, and the air duct back plate 180 is provided with at least one air supply port 181.
  • the air supply port 181 is used to communicate with the air supply air duct 300 and the storage space 200 .
  • the air duct back plate 180 can also be provided with a water retaining rib 182, and the water retaining rib 182 can be arranged on the side of the air duct back plate 180 facing the storage compartment.
  • the back plate 180 may be attached to its surface, and the water retaining ribs 182 can delay the falling speed of the condensed water, try to make all the condensed water evaporate, and avoid falling into the fan cavity and causing failure.
  • the lateral extension may refer to horizontal extension, and it may also be understood that the water retaining ribs 182 have a certain inclination angle. Both of the above two methods can delay the falling speed of the condensation water on the water retaining ribs 182 .
  • the cooling fan 30 of the refrigerator in this embodiment is arranged behind the evaporator 20, and its exhaust port 310 is connected to the lower end of the air supply air duct 300, and is configured to facilitate the formation of a front air return port that flows into the evaporator 20 and then sends the air to the supply air.
  • Refrigeration airflow of channel 300 may include a fan bottom casing 303 , fan blades 302 and a fan upper cover 301 .
  • the air inlet of the centrifugal fan is generally located in the center of the upper cover 301 of the fan, and its height can be higher than the top of the evaporator 20 to increase the air inlet space.
  • the fan upper cover 301 and the air duct back plate 180 are integrally injection-molded single-layer plates, which simplifies the installation steps.
  • the evaporator 20 of this embodiment is disposed in the air-cooled refrigerator at the bottom of the box body 10 , and a frost storage space 400 is defined at the front of the top surface of the evaporator 20 , the partition cover 120 and the air return hood 170 , so that the air return from the front A portion of the incoming air enters the evaporator 20 from the frost containment space 400 .
  • the frost accommodating space 400 changes the deflection angle of the original return air flow, so that the return air flow preferentially passes through the frost accommodating space 400 with a smaller flow resistance and then passes through the evaporator 20, so as to avoid the effect of frost on the evaporator 20 on the entry of the air flow, Improve the heat exchange efficiency and further improve the refrigeration effect of the refrigerator.
  • a top heating wire 140 is provided at the front of the top surface of the evaporator 20 .
  • the frost-receiving space 400 makes the frosting position transfer from the front of the evaporator 20 to the frost-receiving space 400, and the top heating wire 140 is centrally arranged in the front of the top of the evaporator 20, so as to avoid the heat of the heating wire during defrosting from affecting the temperature of the evaporator 20.
  • the refrigeration work optimizes the defrosting structure of the refrigerator, further improves the refrigeration efficiency of the refrigerator, and saves energy consumption.
  • the heating wire limiting portion 132 restricts the top heating wire 140 to the top surface of the evaporator 20 . Since the heating wire limiting portion 132 is provided with a metal temperature uniform layer 1303 , the metal temperature uniform layer 1303 is in contact with the top heating wire 140 . , which can effectively transmit energy and prevent the local temperature of the top heating wire 140 from being too high.
  • the above arrangement simplifies the restriction structure of the top heating wire 140, does not add an aluminum plate, and only fixes the top heating wire 140 through the evaporator heat insulating member 130, which improves safety, has a simplified structure and is convenient to install.

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Abstract

提供了一种蒸发器设置于箱体底部的风冷冰箱。该风冷冰箱包括：箱体，具有底部内胆；分隔盖板，横向设置于底部内胆内，用于将底部内胆的内部空间分隔为冷却室和储物空间，冷却室位于储物空间的下方；回风罩，设置于冷却室的前部，回风罩上开设有连通冷却室和储物空间的至少一个前回风口，利用前回风口向冷却室提供换热所需的空气；蒸发器，呈扁平长方体状，并且从前至后向上倾斜地设置安装于冷却室内，蒸发器顶面的前部与分隔盖板以及回风罩限定一容霜空间，以使从前回风口进入的空气中的一部分从容霜空间进入蒸发器。本发明的方案采用容霜空间结构，结霜位置从原蒸发器前部向容霜空间内转移，便于布置加热丝集中化霜。

Description

蒸发器设置于箱体底部的风冷冰箱 技术领域
本发明涉及家电领域，特别是涉及一种蒸发器设置于箱体底部的风冷冰箱。
背景技术
现有底置蒸发器卧式放置，为了将蒸发器与冷冻间室分隔开一般在蒸发器与风机上部添加盖板。与此同时，为了尽可能大的增加冷冻间室使用空间，盖板应尽可能贴合蒸发器。为保证蒸发器与冷冻间室温度隔绝，需要在盖板下设置隔温层。一般蒸发器的盖板组件由盖板与隔温层共同构成。
但上述设置会造成一系列问题。盖板组件完全贴合蒸发器，蒸发器结霜后容易造成霜堵，从而造成蒸发器实际制冷效率降低，化霜周期较短，整机能耗较高。对于底置蒸发器结构，冷冻间室回风口位于门体与蒸发器之间，蒸发器发生霜堵，会引起回风不畅的现象发生，影响整体制冷效果。
发明内容
本发明的一个目的是要提供一种能够解决上述任一方面问题的蒸发器设置于箱体底部的风冷冰箱。
本发明一个进一步的目的是要改善回风结构，提高冰箱制冷效果。
本发明另一个进一步的目的是要改善冷却室结构，减少蒸发器结霜现象。
特别地，本发明提供了一种蒸发器设置于箱体底部的风冷冰箱，该冰箱包括：箱体，具有底部内胆；分隔盖板，横向设置于底部内胆内，用于将底部内胆的内部空间分隔为冷却室和储物空间，冷却室位于储物空间的下方；回风罩，设置于冷却室的前部，其顶部与分隔盖板的前端相接，并且回风罩上开设有连通冷却室和储物空间的至少一个前回风口，利用前回风口向冷却室提供换热所需的空气；蒸发器，呈扁平长方体状，并且从前至后向上倾斜地设置安装于冷却室内，其中蒸发器顶面的前部与分隔盖板以及回风罩限定一容霜空间，以使从前回风口进入的空气中的一部分从容霜空间进入蒸发器。
进一步地，该冰箱还包括顶部加热丝，至少设置于蒸发器顶面的前部， 并配置成为蒸发器提供化霜所需的热量。
进一步地，该冰箱还包括：蒸发器保温件，设置于分隔盖板与蒸发器的顶部之间，其包括：填充部，填充于分隔盖板与蒸发器顶面之间处于容霜空间后方的区域内；加热丝限位部，从填充部向前延伸，并具有向下凸出的至少一条凸筋，以利用凸筋将顶部加热丝压紧于蒸发器的顶面。
进一步地，凸筋为多条，并且分别位于顶部加热丝的横向中部以及横向两侧的上方。
进一步地，蒸发器保温件由多层不同材质的保温层依次叠加形成，并且保温层包括：保温泡沫层，贴靠分隔盖板的下表面设置；树脂薄膜层，贴靠保温泡沫层的下表面设置；金属均温层，设置于树脂薄膜层的外侧，并与顶部加热丝相抵触。
进一步地，底部内胆的底壁上还开设有接水槽，接水槽的底部开设有排水口；并且风冷冰箱还包括：接水盘，设置于蒸发器与底部内胆的底壁之间，配置成承接蒸发器上的水，并且接水盘与接水槽相对的区域设置有多个通孔；和底部加热丝，盘绕设置于接水盘与蒸发器之间，配置成为蒸发器化霜提供热量。
进一步地，底部加热丝还包括：前方扩展区段，从蒸发器的底部延伸至蒸发器的前方，用于在化霜时加热化除从容霜空间掉落的冰霜。
进一步地，前方扩展区段的功率密度设置为小于或等于10w/m。
进一步地，述回风罩上开设有：第一前回风口，横向开设于回风罩的上部；第二前回风口，横向开设于回风罩的下部，从而使得储物空间的空气从上下两个区域流向蒸发器
进一步地，还包括：风道背板，设置于底部内胆的后壁的前方，并与底部内胆的后壁限定出送风风道，并且风道背板开设有至少一个送风口，送风口用于连通送风风道以及储物空间；制冷风机，设置于蒸发器的后方，其排风口与送风风道的下端相连，并配置成促使形成从前回风口流入蒸发器后送向送风风道的制冷气流。
本发明的蒸发器设置于箱体底部的风冷冰箱中，在蒸发器顶面的前部与分隔盖板以及回风罩限定一容霜空间，以使从前回风口进入的空气中的一部分从容霜空间进入蒸发器。该容霜空间改变了原回风气流偏转角度，从而使回风气流优先通过流阻较小的容霜空间后再经过蒸发器，避免了蒸发器结霜 对气流进入产生影响，提高换热效率，进一步提高冰箱制冷效果。
进一步地，本发明的蒸发器设置于箱体底部的风冷冰箱中，蒸发器顶面的前部设置有顶部加热丝。容霜空间使得结霜位置从蒸发器前部向容霜空间内转移，将顶部加热丝集中布置于蒸发器顶面前部，避免化霜时加热丝的热量影响蒸发器的制冷工作，优化了冰箱的化霜结构，进一步提高冰箱的制冷效率，且节约能耗。
进一步地，本发明的蒸发器设置于箱体底部的风冷冰箱中，加热丝限位部将顶部加热丝限制于蒸发器顶面上，由于加热丝限位部中设置有金属均温层，金属均温层与顶部加热丝接触，可以有效的传递能量，防止顶部加热丝局部温度过高。上述设置简化了顶部加热丝的限制结构，不增设铝板，仅通过蒸发器保温件固定顶部加热丝，提高安全性，结构精简，安装便捷。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的蒸发器设置于箱体底部的风冷冰箱中箱体的示意性主视图；
图2是沿图1中的剖切线A-A截取的示意性剖视图；
图3是图2所示的蒸发器设置于箱体底部的风冷冰箱的箱体底部的示意性剖视图；
图4是图3所示的B区域的示意性局部放大视图，其中示出了蒸发器保温件的加热丝限位部；
图5是图3所示的C区域的示意性局部放大视图，其中示出了回风罩以及容霜空间；
图6是图2所示的冰箱的箱体底部的示意性爆炸图；
图7是图6所示的冰箱的加热丝限位部的示意性结构图；
图8是图6所示的冰箱的底部加热丝的示意性结构图；
图9是图6所示的冰箱的回风罩的示意性结构图。
具体实施方式
图1是根据本发明一个实施例的蒸发器设置于箱体底部的风冷冰箱的示意性前视图。图2是图1所示的风冷冰箱的示意性侧剖图。冰箱一般性地可包括箱体10，箱体10包括外壳、内胆以及其他附件。外壳是冰箱的外层结构，保护着整个冰箱。内胆可以分为一个或多个，内胆根据功能可以被划分为冷藏内胆、变温内胆、冷冻内胆等，具体的内胆个数以及功能可以根据冰箱的使用需求进行配置。本实施例中内胆至少包括底部内胆110，底部内胆110一般可为冷冻内胆。箱体10底部后方限制有压机舱500。
如图3-图9所示实施例的冰箱中设置有分隔盖板120。分隔盖板120横向设置于底部内胆110内，用于将底部内胆110的内部空间分隔为冷却室100和储物空间200，冷却室100位于储物空间200的下方。
冷却室100的前部设置有回风罩170，回风罩170顶部与分隔盖板120的前端相接，并且回风罩170上开设有连通冷却室100和储物空间200的至少一个前回风口，利用前回风口向冷却室100提供换热所需的空气。
本实施例的蒸发器20呈扁平长方体状，并且从前至后向上倾斜地设置安装于冷却室100内，其中蒸发器20顶面的前部与分隔盖板120以及回风罩170限定一容霜空间400，以使从前回风口进入的空气中的一部分从容霜空间400进入蒸发器20。容霜空间400改变了原回风气流偏转角度，从而使回风气流优先通过流阻较小的容霜空间400再经过蒸发器20，避免了蒸发器20结霜对气流进入产生影响，提高换热效率，进一步提高冰箱制冷效果。
本实施例的冰箱还包括顶部加热丝140。顶部加热丝140至少设置于蒸发器20顶面的前部并配置成为蒸发器20提供化霜所需的热量。也就是在一些实施例中，顶部加热丝140可以仅在蒸发器20顶面的前部设置(或可描述为顶部加热丝140可以仅在容霜空间的区域内设置)，便于加热丝布置集中化霜。既可以提高化霜效果，又可以避免热气流向储物空间200外溢。
在另一些实施例中，顶部加热丝140可覆盖整个蒸发器20顶面，通过蒸发器20顶面不同位置所需的化霜热量不同，对顶部加热丝140的密度进行调整。靠近蒸发器20顶面前部布置顶部加热丝140的密度最大，依次向后递减，为蒸发器20前部容霜空间400提供足够的热量，但提供的热量并不影响蒸发器20正常工作。顶部加热丝140的功率与实际温度可以分段设置，温度不超过80度，有效提高安全等级并保障了化霜效果。采用容霜空 间400结构后，结霜位置从蒸发器20前部向容霜空间400转移，便于加热丝集中布置进行化霜。化霜操作时，被加热的空气热气流上升，被分隔盖板120阻挡，在容霜空间400聚集。既可以提高化霜效果，又可以阻挡热气流向储物空间200外溢，从而提高保鲜效果。
在分隔盖板120与蒸发器20的顶部之间设置有蒸发器保温件130。蒸发器保温件130的设置可以减少蒸发器20的热量损失，减少蒸发器20表面结霜甚至结冰。现有技术中的冰箱蒸发器20表面的冷量易向储物空间200方向扩散，导致储物空间200的底部区域温度明显低于储物空间200其他部分的温度，使得储物空间200内整体温度分布不均，本实施例中使用蒸发器保温件130避免了上述问题的发生。当对蒸发器20化霜时，蒸发器保温件130也可避免热量扩散导致储物空间200温度上升，即避免造成能量损失，影响储物质量。
蒸发器保温件130由多层不同材质的保温层依次叠加形成。其中保温层包括保温泡沫层1301、树脂薄膜层1302以及金属均温层1303。
保温泡沫层1301，贴靠分隔盖板120的下表面设置。保温泡沫层1301质量较轻，具有一定的结构强度，设置于分隔盖板120下表面可避免储物空间200内放入较大物品而对箱体10产生冲击。
树脂薄膜层1302贴靠保温泡沫层1301的下表面设置。树脂薄膜层1302可以设置为聚乙烯薄膜(PE膜)。聚乙烯薄膜的比重轻，覆盖容易，且聚乙烯薄膜收缩能紧贴上层或下层的保温层，使得保温层连接紧密，整体性强不易分离。且聚乙烯薄膜无毒无害，防水防菌持久耐用，适合冰箱的使用环境。
金属均温层1303，设置于树脂薄膜层1302的外侧，并与蒸发器20的顶部相对。金属均温层1303可以设置为铝箔。铝箔的延展性好，可以最大限度的降低金属均温层1303的厚度防止占用过多冰箱内部空间，且导热性能优越，能够均匀蒸发器20顶部的温度，避免蒸发器20上方储物空间200温度分布不均匀的问题发生。
蒸发器保温件130包括填充部131与加热丝限位部132。填充部131填充于分隔盖板120与蒸发器20顶面之间处于容霜空间400后方的区域内。加热丝限位部132从填充部131向前延伸，并具有向下凸出的至少一条凸筋1320，以利用凸筋1320将顶部加热丝140压紧于蒸发器20的顶面。凸筋1320 为多条，并且分别位于顶部加热丝140的横向中部以及横向两侧的上方，将顶部加热丝140固定更加稳固。
加热丝限位部132制作为山形结构，将顶部加热丝140中部限制于蒸发器20顶面上，由于蒸发器保温件130中设置有金属均温层1303，金属均温层1303与顶部加热丝140接触，可以有效的传递能量，防止顶部加热丝140局部温度过高。上述设置简化了顶部加热丝140的限制结构，不增设铝板，仅通过蒸发器保温件130固定顶部加热丝140，提高安全性，结构精简，安装便捷。
底部内胆110的底壁上还开设有接水槽111，接水槽111的底部开设有排水口112。排水口112将化霜产生的化霜水导入压机舱500内的蒸发皿510中。
风冷冰箱还可以包括接水盘160。接水盘160设置于蒸发器20与底部内胆110的底壁之间，配置成承接蒸发器20上的水，并且接水盘160与接水槽111相对的区域设置有多个通孔，该通孔用于将化霜产生的化霜水导入接水盘160中。
本实施例的冰箱还设置有底部加热丝150。底部加热丝150盘绕设置于接水盘160与蒸发器20之间，配置成为蒸发器20化霜提供热量。底部加热丝150还包括：前方扩展区段151，从蒸发器20的底部延伸至蒸发器20的前方，用于在化霜时加热化除从容霜空间400掉落的冰霜。化霜过程中，容霜空间400掉落的霜冰，通过底部加热丝150的前方扩展区段151化掉。底部加热丝150与接水盘160相互固定在一起，保证热量均匀传递，接水盘160也可在运输过程中起到安全防护的作用。前方扩展区段151的功率密度不超过10w/m，因为此处需要热量较少，所以根据此设计可以有效提高安全等级。
底部加热丝150与顶部加热丝140的功率按需设计，可以在保证化霜效果的同时另外降低能量的浪费还可以降低冷冻间室的温升，从而利于冷冻间室的保鲜效果提升。
本实施例的回风罩170开设有第一前回风口177与第二前回风口178。第一前回风口177，横向开设于回风罩170的上部。第二前回风口178横向开设于回风罩170的下部，从而使得储物空间200的空气从上下两个区域流向蒸发器20。
回风罩170可以包括第一板面171、第二板面172、第三板面173、第四 板面174、第五板面175以及边框176。
第一板面171，从分隔盖板120的前端从后向前向下倾斜延伸。第二板面172，从第一板面171的前端从前向后向下倾斜延伸，从而向冷却室100方向凹入。
第一前回风口177开设于第二板面172上。第一前回风口177通过开设在第二板面172上的栅格孔形成。现有技术中的回风罩170结构容易导致回风风量分布不均，在回风口附近区域(如回风罩上盖的前端、回风罩上盖内部弯折处)产生气流聚集，影响回风效率。本实施例中的回风罩170由于第二板面172向内倾斜，第一前回风口177的设置位置也随之向冷却室100的方向延伸。当气流流经第一板面171时，由于第一板面171向下倾斜，可将气流向下引导。气流流经第一板面171与第二板面172所形成的向冷却室100内的夹角时，会随着夹角内存在的涡流均匀进入冷却室100，解决了风量分配不均与聚集的情况，提高了回风效率，使回风更顺畅。前回风口处形成栅格，栅格孔呈竖条状，在横向上依次分布，对回风进行分散，使得回风更加均匀地进入蒸发器20的上部区段中。第一前回风口177在竖直方向与蒸发器20的顶面基本平齐，使得从第一前回风口177进入冷却室100的气流可均匀地与蒸发器20进行换热。在蒸发器20前部设置有容霜空间400，改变了原回风气流的偏转角度，从而使气流优先通过流阻较小的容霜空间400，在通过蒸发器20，使得蒸发器20中气流换热更加均匀。通过仿真分析及结霜量计算设置合理的容霜空间400大小，可以兼顾结霜前与结霜后蒸发器20使用效率，从而整体提升制冷效果。
从第一前回风口177进入的箱体10外部空气在接触较冷的蒸发器20表面后，在容霜空间400内结霜，蒸发器20顶面设置的顶部加热丝140为蒸发器20前部容霜空间400提供足够的热量进行化霜，但提供的热量并不影响蒸发器20正常工作。
第三板面173，从第二板面172的后端由后向前向下倾斜延伸，从而向前凸出。第四板面174，从第三板面173的前端从前向后向下倾斜延伸，从而向冷却室100的方向凹入。第五板面175，从第四板面174的后端向后继续向下倾斜延伸。
第二前回风口178形成于第五板面175与边框176之间，第二前回风口178在竖直方向的投影基本与蒸发器20中部平齐，使得从第二前回风口178 进入冷却室100的气流可均匀地与蒸发器20进行换热。
本实施例的风冷冰箱还可以包括风道背板180。风道背板180设置于底部内胆110的后壁113的前方，并与底部内胆110的后壁113限定出送风风道300，并且风道背板180开设有至少一个送风口181，送风口181用于连通送风风道300以及储物空间200。风道背板180上还可以设置有挡水筋182，挡水筋182可以设置在风道背板180朝向储物间室的一面上，由于气流中含有部分冷凝水，当气流遇到风道背板180时可能会附着其表面，挡水筋182可以延缓冷凝水的下降速度，尽量使得冷凝水全部蒸发，避免落入风机腔导致故障。在本实施例中，横向延伸可以指水平延伸，也可以理解为挡水筋182具有一定的倾斜角度，上述两种方式均可以延缓挡水筋182上的冷凝水下落速度。
本实施例冰箱的制冷风机30，设置于蒸发器20的后方，其排风口310与送风风道300的下端相连，并配置成促使形成从前回风口流入蒸发器20后送向送风风道300的制冷气流。在使用离心风机作为制冷风机30的实施例中，离心风机可包括风机底壳303、风机叶片302和风机上盖301。离心风机的进风口一般位于风机上盖301的中心，其高度可以高于蒸发器20的顶端，增大进风空间。风机上盖301与风道背板180为一体注塑成型的单层板，简化安装步骤。
本实施例的蒸发器20设置于箱体10底部的风冷冰箱中，在蒸发器20顶面的前部与分隔盖板120以及回风罩170限定一容霜空间400，以使从前回风口进入的空气中的一部分从容霜空间400进入蒸发器20。该容霜空间400改变了原回风气流偏转角度，从而使回风气流优先通过流阻较小的容霜空间400后再经过蒸发器20，避免了蒸发器20结霜对气流进入产生影响，提高换热效率，进一步提高冰箱制冷效果。
进一步地，蒸发器20顶面的前部设置有顶部加热丝140。容霜空间400使得结霜位置从蒸发器20前部向容霜空间400内转移，将顶部加热丝140集中布置于蒸发器20顶面前部，避免化霜时加热丝的热量影响蒸发器20的制冷工作，优化了冰箱的化霜结构，进一步提高冰箱的制冷效率，且节约能耗。
进一步地，加热丝限位部132将顶部加热丝140限制于蒸发器20顶面上，由于加热丝限位部132中设置有金属均温层1303，金属均温层1303与 顶部加热丝140接触，可以有效的传递能量，防止顶部加热丝140局部温度过高。上述设置简化了顶部加热丝140的限制结构，不增设铝板，仅通过蒸发器保温件130固定顶部加热丝140，提高安全性，结构精简，安装便捷。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种蒸发器设置于箱体底部的风冷冰箱，包括：
    箱体，具有底部内胆；
    分隔盖板，横向设置于所述底部内胆内，用于将所述底部内胆的内部空间分隔为冷却室和储物空间，所述冷却室位于所述储物空间的下方；
    回风罩，设置于所述冷却室的前部，其顶部与所述分隔盖板的前端相接，并且所述回风罩上开设有连通所述冷却室和所述储物空间的至少一个前回风口，利用所述前回风口向所述冷却室提供换热所需的空气；
    蒸发器，呈扁平长方体状，并且从前至后向上倾斜地设置安装于所述冷却室内，其中所述蒸发器顶面的前部与所述分隔盖板以及所述回风罩限定一容霜空间，以使从所述前回风口进入的空气中的一部分从所述容霜空间进入所述蒸发器。
  2. 根据权利要求1所述的蒸发器设置于箱体底部的风冷冰箱，还包括：
    顶部加热丝，至少设置于所述蒸发器顶面的前部，并配置成为所述蒸发器提供化霜所需的热量。
  3. 根据权利要求2所述的蒸发器设置于箱体底部的风冷冰箱，还包括：
    蒸发器保温件，设置于所述分隔盖板与所述蒸发器的顶部之间，其包括：
    填充部，填充于所述分隔盖板与所述蒸发器顶面之间处于所述容霜空间后方的区域内；
    加热丝限位部，从所述填充部向前延伸，并具有向下凸出的至少一条凸筋，以利用所述凸筋将所述顶部加热丝压紧于所述蒸发器的顶面。
  4. 根据权利要求3所述的蒸发器设置于箱体底部的风冷冰箱，其中
    所述凸筋为多条，并且分别位于所述顶部加热丝的横向中部以及横向两侧的上方。
  5. 根据权利要求3所述的蒸发器设置于箱体底部的风冷冰箱，其中
    所述蒸发器保温件由多层不同材质的保温层依次叠加形成，并且所述保温层包括：
    保温泡沫层，贴靠所述分隔盖板的下表面设置；
    树脂薄膜层，贴靠所述保温泡沫层的下表面设置；
    金属均温层，设置于所述树脂薄膜层的外侧，并与所述顶部加热丝相抵触。
  6. 根据权利要求1所述的蒸发器设置于箱体底部的风冷冰箱，其中
    所述底部内胆的底壁上还开设有接水槽，所述接水槽的底部开设有排水口；并且所述风冷冰箱还包括：
    接水盘，设置于所述蒸发器与所述底部内胆的底壁之间，配置成承接所述蒸发器上的水，并且所述接水盘与所述接水槽相对的区域设置有多个通孔；和
    底部加热丝，盘绕设置于所述接水盘与所述蒸发器之间，配置成为所述蒸发器化霜提供热量。
  7. 根据权利要求6所述的蒸发器设置于箱体底部的风冷冰箱，其中
    所述底部加热丝还包括：前方扩展区段，从所述蒸发器的底部延伸至所述蒸发器的前方，用于在化霜时加热化除从所述容霜空间掉落的冰霜。
  8. 根据权利要求7所述的蒸发器设置于箱体底部的风冷冰箱，其中
    所述前方扩展区段的功率密度设置为小于或等于10w/m。
  9. 根据权利要求1所述的蒸发器设置于箱体底部的风冷冰箱，其中所述回风罩上开设有：
    第一前回风口，横向开设于所述回风罩的上部；
    第二前回风口，横向开设于所述回风罩的下部，从而使得所述储物空间的空气从上下两个区域流向所述蒸发器。
  10. 根据权利要求1所述的蒸发器设置于箱体底部的风冷冰箱，还包括：
    风道背板，设置于所述底部内胆的后壁的前方，并与所述底部内胆的后壁限定出送风风道，并且所述风道背板开设有至少一个送风口，所述送风口用于连通所述送风风道以及所述储物空间；
    制冷风机，设置于所述蒸发器的后方，其排风口与所述送风风道的下端 相连，并配置成促使形成从前回风口流入所述蒸发器后送向所述送风风道的制冷气流。
PCT/CN2021/111718 2020-08-18 2021-08-10 蒸发器设置于箱体底部的风冷冰箱 WO2022037437A1 (zh)

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