TWI722397B - refrigerator - Google Patents

Abstract

The refrigerator of the present invention includes a main body, a cooler, and a compressor. The main body has: a refrigerating chamber, a freezing chamber arranged lower than the refrigerating chamber, and arranged between the refrigerating chamber and the freezing chamber, and set higher than the freezing chamber Storage room with temperature zone. The cooler is arranged behind the storage room on the air path between the storage room back wall on the back side of the storage room and the main body back wall constituting the back of the main body, and cools the air inside the main body. The compressor is arranged below the cooler. The main body is provided with: a refrigerating compartment return port through which air in the refrigerating compartment passes when returning to the cooler; a storage compartment return port through which air in the storage compartment passes when returning to the cooler; and a freezing compartment return port through which the air in the freezer compartment passes through the storage compartment. The air path on the back wall passes when returning to the cooler. The refrigerating chamber return port and the storage chamber return port are respectively arranged below the lower end of the cooler. The freezer compartment return port is arranged between the lower end and the upper end of the cooler.

Description

refrigerator

The present invention relates to a refrigerator equipped with a cooler.

In the past, a refrigerator with a cooler installed at the rear of the storage room was known. In this type of refrigerator, a cooler and a fan are installed in an air passage separated by a wall, and the cold air generated by the cooler is sent to the refrigerator including a storage compartment by the fan. In other words, a circulating air passage for cold air is formed in the refrigerator, and the cold air passing through the cooler rises in temperature due to the thermal load of each part, and returns to the cooler again (for example, refer to Patent Document 1).

In the above-mentioned refrigerator, for example, due to moisture evaporating from food stored in the refrigerator, or moisture in the air entering from outside the refrigerator when the door is opened and closed, cold air containing a lot of moisture is frosted when returning to the cooler. Frosting is a phenomenon in which moisture in the air condenses and accumulates on the surface of the cooler as ice crystals when the surface temperature of the cooler in contact with the air becomes lower than the dew point temperature. The storage room, especially the cold air returning from the refrigerator room, generally contains a lot of moisture. When the surface of the cooler is frosted and continues to grow, blockage will occur between the cooling fins of the cooler, which will increase the air path resistance and reduce the cooling performance.

In addition, the refrigerator of Patent Document 1 is provided with a vegetable compartment in the lowermost stage and a freezer compartment in the upper stage. Then, the storage room return port, which blows out the air from the vegetable room back to the cooler, will be installed on the ceiling of the vegetable room. The freezer compartment return port, which blows out the air returning from the freezer compartment to the cooler, will be installed on the back wall of the freezer compartment. Advanced technical literature Patent literature

Patent Document 1: Japanese Patent Application Laid-Open No. 2008-202823

However, in the refrigerator of Patent Document 1, when the arrangement of the vegetable compartment and the freezer compartment is reversed, the storage compartment return opening is provided on the back wall of the vegetable compartment, and the freezer compartment return opening is provided on the ceiling of the freezer compartment. In this way, the return cold air from the vegetable compartment with relatively high humidity and temperature will flow into the cooler from above the lower end of the cooler, and the return cold air from the freezer compartment with relatively low humidity and temperature will flow from the lower end of the cooler. The lower side flows into the cooler. Therefore, above the cooler, the return cold air from the vegetable compartment and the return cold air from the freezing compartment are mixed, so that frost forms on the heat sink, which increases the air path resistance and causes a problem of a decrease in cooling performance. In addition, it is not limited to the vegetable compartment, and the same problem as described above also occurs when another storage compartment set to a higher temperature zone than the freezer compartment is installed in the upper stage of the freezer compartment.

The object of the present invention is to solve the above-mentioned problems and provide a refrigerator that can improve the cooling performance of the cooler even when a storage room in a higher temperature range than the freezer compartment is installed in the upper part of the freezer compartment.

The refrigerator of the present invention includes: a main body, a cooler, and a compressor. The main body has: a refrigerating compartment, a freezing compartment arranged lower than the refrigerating compartment, a storage compartment installed between the refrigerating compartment and the freezing compartment, set in a higher temperature zone than the freezing compartment, and having a storage compartment back wall on the back side room. The cooler is arranged behind the storage room on the air path between the back wall of the storage room and the back wall of the main body constituting the back of the main body, and cools the air inside the main body. The compressor is arranged below the cooler. The main body is provided with: a refrigerating compartment return port through which air in the refrigerating compartment passes when returning to the cooler; a storage compartment return port through which air in the storage compartment passes when returning to the cooler; and a freezing compartment return port through which the air in the freezer compartment passes through the storage compartment. The air path on the back wall passes when returning to the cooler. The refrigerating chamber return port and the storage chamber return port are respectively arranged below the lower end of the cooler. The freezer compartment return port is arranged between the lower end and the upper end of the cooler.

According to the present invention, the refrigerating chamber return port and the storage chamber return port are arranged below the lower end of the cooler, and the freezing chamber return port of the air path connecting the back wall of the storage chamber is arranged above the lower end of the cooler. Therefore, the air from the refrigerator compartment and the vegetable compartment with relatively high moisture can flow in from below the cooler, and the air from the freezer compartment can flow in from above the lower end of the cooler. Thereby, even when a storage room in a higher temperature zone than the freezer compartment is provided in the upper stage of the freezer compartment, it is possible to improve the cooling performance of the cooler.

[Implementation Type 1]

Fig. 1 is a perspective view illustrating the appearance of the refrigerator according to Embodiment 1 of the present invention. Figure 2 is a front view of the refrigerator of Figure 1 viewed from the door side. With reference to Figs. 1 and 2, the overall structure of the refrigerator 10 of the first embodiment will be described. In FIGS. 1 and 2, the front-rear direction of the refrigerator 10 corresponds to the x-axis direction, the left-right direction of the refrigerator 10 corresponds to the y-axis direction, and the vertical direction of the refrigerator 10 corresponds to the z-axis direction. In other words, the front of the refrigerator 10 corresponds to the positive direction of the x-axis, and the upper part of the refrigerator 10 corresponds to the positive direction of the z-axis.

The refrigerator 10 includes a main body 20, and the main body 20 has a plurality of storage compartments to be cooled. The main body 20 has a refrigerating compartment 1 and a freezing compartment 5 provided below the refrigerating compartment 1. In addition, the main body 20 is provided between the refrigerator compartment 1 and the freezer compartment 5, and has a vegetable compartment 4 as a storage compartment set in a lower temperature zone than the freezer compartment 5. More specifically, the refrigerator 10 illustrated in FIG. 1 has a refrigerating compartment 1, an ice making compartment 2, a switching compartment 3, a vegetable compartment 4, and a freezing compartment 5 as a plurality of storage compartments.

The refrigerator compartment 1 is provided in the uppermost stage of the main body part 20, and is set in the refrigerating temperature zone. The freezing compartment 5 is provided in the lowermost stage of the main body part 20, and is set in the freezing temperature zone. The vegetable compartment 4 is installed in the upper part of the freezer compartment 5, and is set to a temperature slightly higher than the refrigerating temperature zone. Between the refrigerator compartment 1 and the vegetable compartment 4, an ice making compartment 2 and a switching compartment 3 are provided. In the example of FIG. 1, the ice making chamber 2 is arranged on the left side of the front, and the switching chamber 3 is arranged on the right side of the front.

The ice making chamber 2 is set in a freezing temperature zone, and ice automatically produced by an automatic ice maker (not shown) is accumulated in the ice bank 2a. The switching chamber 3 can switch the set temperature in a wide range from the freezing temperature zone to the refrigerating temperature zone. In other words, the switching chamber 3 switches the cold storage temperature zone to, for example, a freezing temperature zone of about -18°C, a refrigerating temperature zone of about 3°C, a cold temperature zone of about 0°C, for example, a soft freezing temperature zone of about -7°C. And other temperature zones.

A refrigerating chamber door 11 that opens and closes the refrigerating chamber 1 is provided in front of the refrigerating chamber 1. In FIG. 1, the refrigerator compartment door 11 is comprised by the 1st door 11a and the 2nd door 11b, and is a double-opening type (Kuanyin type) two doors. However, the refrigerating compartment 11 is not limited to two doors of a double opening type, and may be a single door of a single opening type.

The ice making compartment 2, the switching compartment 3, the vegetable compartment 4, and the freezing compartment 5 are opened and closed by pull-out doors, respectively. That is, in front of the ice making compartment 2, an ice making compartment door 12 for opening and closing the ice making compartment 2 is provided. In front of the switching chamber 3, a switching chamber door 13 for opening and closing the switching chamber 3 is provided. In front of the vegetable room 4, a vegetable room door 14 for opening and closing the vegetable room 4 is provided. In front of the freezer compartment 5, a freezer compartment door 15 for opening and closing the freezer compartment 5 is provided. These pull-out doors can be opened and closed in the front-rear direction (inward moving direction) of the refrigerator 10 by sliding a frame fixed to the door body with respect to rails horizontally formed on the left and right inner wall surfaces of each storage compartment.

Fig. 3 is a schematic cross-sectional view taken along line A-A in Fig. 2. The inside of the refrigerator of the refrigerator 10 is insulated from the outside, that is, the outside air, by the refrigerating compartment door 11, the ice making compartment door 12, the switching compartment door 13, the vegetable compartment door 14, the freezing compartment door 15 and the heat insulation wall 21. The heat insulation wall 21 includes a main body back wall 22 constituting the back surface of the main body portion 20. A storage room back wall 24 that becomes the back wall of the vegetable room 4 is provided on the back of the vegetable room 4. In the first embodiment, the back wall 24 of the storage compartment is formed as the back wall of the ice making compartment 2, the switching compartment 3, and the vegetable compartment 4.

Between the refrigerating compartment 1, the ice making compartment 2 and the switching compartment 3, a partition plate 25 is provided. Between the ice making room 2, the switching room 3, and the vegetable room 4, a partition plate 26 is provided. Between the vegetable compartment 4 and the freezing compartment 5, a partition plate 27 is provided.

In addition, the refrigerator 10 includes a cooler 30, a circulation fan 40, a heater 51, and a compressor 61. The cooler 30 is composed of, for example, a fin and tube type heat exchanger, and cools the air sent from each storage room. The circulation fan 40 blows the air cooled by the cooler 30 to each storage compartment in the refrigerator. The air cooled by the cooler 30 is blown by the circulation fan 40 to each storage room. That is, the circulation fan 40 contributes to low-temperature maintenance of the temperature in the refrigerator. The air cooled by the cooler 30 and blown to each storage room returns to the cooler 30 from each storage room again to be cooled. That is, the refrigerator 10 constitutes a structure in which the air in the refrigerator circulates through the air path connecting the cooler 30 and each storage room.

The heater 51 is composed of, for example, a radiant heater, and is provided below the cooler 30 without contacting the cooler 30. The heater 51 is a defrosting device provided to defrost the cooler 30 and heat and remove the frost adhering to the cooler 30. The compressor 61 is provided in the lowermost part of the back side of the refrigerator 10. The compressor 61 is a component of the refrigerator 10 that constitutes a refrigeration cycle, and has a function of compressing refrigerant. The cooler 30 and the heater 51 are arranged on the air path between the storage compartment back wall 24 and the main body back wall 22. That is, the cooler 30 and the heater 51 are housed in the cooling chamber 100 between the storage room back wall 24 and the main body back wall 22. In the cooling chamber 100, air flows through the cooler 30 from below to above. The air cooled in the cooling chamber 100 passes through the duct, and is supplied to each storage room from the blower port provided in each storage room.

The outer wall above the freezing chamber 5 is provided with a freezing chamber inlet port 5a, the air from the freezing chamber 100 flows into the cooling chamber 5, i.e., the freezing chamber cold air returns C _5, flows into the freezing chamber inlet 5a. A freezer compartment return port 5b is provided on the cooling compartment 100 side of the storage compartment back wall 24, and the air in the freezer compartment 5 passes through the freezer compartment return port 5b when returning to the cooler 30. As shown in FIG. 3, the freezer compartment inlet 5a is provided below the lower end of the cooler 30. As shown in FIG. The freezer compartment return port 5b is provided at a position between the lower end and the upper end of the cooler 30. The freezer compartment inlet 5a and the freezer compartment return port 5b will communicate with the inner wall of the back wall 24 of the storage compartment.

_{That is, a freezer return air path P 5} is formed between the freezer inlet 5a and the freezer return port 5b, _{and the freezer return cold air C 5} flow that flows in from the freezer inlet 5a and blows out from the freezer return port 5b Over. Thus, the freezing chamber cold air returns C ₅ from the freezing chamber disposed more downward than the lower end of the cooler 30 flows into the inlet port 5a freezer compartment return air path P _5. Then, the freezing chamber cold air returns C ₅ P ₅ through the return air passage freezer compartment return port 5b is blown out from a lower end positioned above the cooler 30 is more than the freezer compartment, a level higher than the lower end of cooler 30 flows.

On the cooling chamber 100 side of the storage chamber back wall 24, a cold air blowing port 5c is provided above the upper end of the cooler 30. The upper outer wall of the freezer compartment 5 is provided with a blower outlet 5d in front of the freezer compartment inlet 5a. The cold air blowing port 5c and the blowing port 5d communicate with the inside of the back wall 24 of the storage room. That is, between the cold air vent 5c and the feed outlet 5D, there is formed out freezer compartment air passage Q _5, from the cooling chamber 100 is sent to the freezing chamber cold air 5 flows.

When opening and closing the doors (11-15) of each storage room, outside air containing a lot of moisture may enter each storage room. Generally speaking, the refrigerating compartment 1 is frequently opened and closed by the user compared to the freezing compartment 5. Thus, back to the air cooler 30 from a refrigerator compartment, refrigerator compartment return cool air C is _a water content, in general, the water content returns cool air C more than the freezer compartment _5. Thus, a long time so that the refrigerator 10 is operated, the water content of the refrigerator compartment containing a plurality of cool air returns to the cooler 30 C in the case of the heat exchanger _1, the surface of the cooler 30 will probably frost.

Fig. 4 is a refrigerant circuit diagram of the refrigerator shown in Fig. 1. As shown in Fig. 4, the refrigerator 10 includes a refrigerant circuit 60 in which a compressor 61, a piping group 62, an expander 63, and a cooler 30 are connected by a refrigerant piping 60a, and a refrigerant such as isobutane circulates therein.

The compressor 61 adiabaticly compresses the refrigerant to turn it into a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant flowing out of the compressor 61 goes toward the pipe group 62 embedded in the heat insulating wall 21 provided in the refrigerator box, radiates heat in the pipe group 62 and becomes a liquid refrigerant. Thereafter, the liquid refrigerant flowing out of the piping group 62 is expanded by an expander 63 such as a capillary tube to form a low-temperature gas-liquid two-phase refrigerant. When the gas-liquid two-phase refrigerant expanded by the expander 63 passes through the cooler 30, it exchanges heat with the return air C from each storage compartment in the refrigerator. When the gas-liquid two-phase refrigerant flowing into the cooler 30 exchanges heat with the return air C, it absorbs the heat of the return air C, becomes a gas, and returns to the compressor 61. The air whose temperature is lowered by absorbing heat by the cooler 30 is sent into the refrigerator by the circulation fan 40. In this way, the refrigerant circuit 60 of the refrigerator 10 performs a cooling operation to circulate and cool the air in the refrigerator. In addition, the return air C includes the refrigerating compartment return air C ₁ , the storage compartment return cold air C ₄ , and the freezer compartment return cold air C ₅ .

Fig. 5 is a schematic diagram showing the structure of the cooling chamber and its surroundings in Fig. 3. That is, Fig. 5 is a view of the cooler 30 and its surrounding structure from the front side. In addition, Fig. 6 is a schematic cross-sectional view taken along line B-B in Fig. 5. With reference to Figs. 5 and 6, the structure of the cooler 30 and the air duct will be specifically explained. As described above, the cooling chamber 100 is the space between the storage chamber back wall 24 and the main body back wall 22, in which the circulation fan 40, the cooler 30 and the heater 51 are accommodated.

As shown in FIG. 5, in the main body 20, a refrigerating chamber return air passage P _{1 is} formed on one side surface of the cooling chamber 100 to allow the refrigerating chamber return cold air C _{1 to} pass. Then, the main body portion 20 is provided with a refrigerating compartment return port 1b, and the air in the refrigerating compartment 1 passes through when returning to the cooler 30. The refrigerating compartment return port 1b is provided at a location below the lower end of the cooler 30 among one side surface in the left-right direction of the cooling compartment 100. That is, the cool air C ₁ refrigerator compartment return air is returned from the refrigerating compartment blowing port 1b through the cooler 30 from below upward.

In addition, the main body portion 20 is provided with a storage compartment return port 4b, and the air in the vegetable compartment 4 passes when it returns to the cooler 30. The storage chamber return port 4b may be provided in the other side surface of the cooling chamber 100 in the left-right direction, below the lower end of the cooler 30. Thus, the return air blown from the port 4b storage compartment, the storage compartment is returned cool air through the cooler 30 is also C ₄ upward from below.

On the other hand, the freezer compartment return port 5b is provided at a position between the lower end and the upper end of the cooler 30 as described above. Accordingly, the freezer compartment return port 5b is blown out from the freezing chamber cold air returns C _5, flows into the cooler than the lower end 30 of the upper side more and then upward through the cooler 30. That is, by the cooling chamber 100, relatively much moisture can be suppressed refrigerator compartment return air-storage chamber C ₁ and returns cool air C _4, and the relatively low temperature of the freezing chamber cold air returns mixed C _5, frosting can be suppressed in cooling器30. Therefore, it is possible to suppress an increase in air path resistance due to frost formation of the cooler 30, and therefore it is possible to improve the cooling performance of the cooler 30.

In addition, the refrigerating compartment return port 1b is provided on one side surface of the main body portion 20, and the storage compartment return port 4b is provided on the other side surface of the main body portion 20. That is, the storage compartment return port 4b is provided on the side surface of the main body portion 20 opposite to the refrigerating compartment return port 1b. Thus, due to the frost refrigerator compartment return water contained in the cool air C ₁ caused, it can be concentrated around the cooling chamber 30 in one of the storage compartment due to the cold air return frost water containing C ₄ caused by , Can be concentrated on the other one of the left and right sides of the cooling chamber 30. Therefore, it is possible to prevent the frost formation in the cooler 30 from being biased to one side. In the example in Figure 5, the frost caused by the refrigerating room returning to the cold air C ₁ can be concentrated on the positive side of the y axis, and the frosting caused by the moisture contained in the _{storage room returning to the cold air C 4 can be concentrated on the negative side of the y axis} .

The cooler 30 has a piping section 35 in which one or a plurality of heat transfer tubes 33 are arranged in the vertical direction. In the piping section 35 illustrated in FIG. 6, three heat transfer tubes 33 arranged in the front-rear direction are arranged in 8 rows in the up-down direction. The piping portion 35 has a plurality of connecting pipes 34 formed in a U-shape. In other words, in the piping section 35, a plurality of heat transfer tubes 33 are arranged in the front-rear direction and the up-down direction, and the left-right ends of the two heat-transfer tubes 33 adjacent in the up-down direction are connected by the connecting tube 34. Thereby, as shown in FIG. 5, the piping part 35 which is connected integrally is formed.

In addition, the cooler 30 has a heat sink group 32 in which plural heat sinks 31 arranged in the left-right direction are arranged in plural layers along the up-down direction. In the heat sink group 32, a plurality of heat sinks 31 through which the heat transfer tubes 33 in one or two rows pass are arranged in a plurality of layers in the vertical direction. Figures 5 and 6 illustrate the heat sink group 32. One row of heat pipes 33, that is, a plurality of heat sinks 31 penetrated by the three heat pipes 33 arranged in the front-to-rear direction, runs along the upper and lower sides. The direction is arranged in 8 layers.

In the heat sink group 32, a plurality of heat sinks 31 arranged in the left-right direction in each layer are placed such that the intervals between the respective heat sinks 31 are constant, that is, the heat sink pitches are constant. The cooler 30 can try to enlarge the heat transfer area and improve the cooling performance by keeping the interval between the heat sink 31 and the heat sink 31 constant.

In the first embodiment, the lower heat sink pitch in the heat sink group 32 is wider than the upper heat sink pitch. That is, the fin pitch of the lower layer in the fin group 32 is wider than the fin pitch of the upper layer. In the heat sink group 32 of the first embodiment, there are two types of heat sink pitches, and at least one layer of heat sink pitches on the lower side is relatively wide.

In the heat sink group 32 exemplified in FIG. 5, the pitch of the heat sinks of the lower two layers is wider than the pitch of the heat sinks of the upper six layers. That is, as shown in FIG. 5, the heat sink group 32 is composed of the upper heat sink group 32a arranged on the upper side of the area Ra of the cooler 30, and the lower heat sink group 32a arranged on the lower side of the area Rb on the lower side of the cooler 30 Group 32b is constituted. Then, the interval between the heat sinks 31 included in the upper heat sink group 32a is wider than the interval between the heat sinks 31 included in the lower heat sink group 32b.

Adjust the spacing between the fins 31 as described above, even if the refrigerating chamber cold air contains more water to return the storage chamber C ₁ and C ₄ returns cool air flows into the bottom of the cooler 30, the cooler 30 at the bottom, since frosting The resulting blockage between the heat sinks 31 will also be relieved. Therefore, it is possible to suppress an increase in air path impedance. In addition, in the first embodiment, the freezer compartment return port 5b is arranged opposite to the lower side of the upper fin group 32a of the fin group 32 whose fin pitch is relatively narrow. Thus, frosting can be suppressed to below the cooler 30, can be secured and the freezing chamber cold air return art C ₅ through the cooler 30, it is possible to contribute to improve the heat exchange efficiency.

In addition, the refrigerator 10 as a defrosting device includes, in addition to the heater 51, a plurality of heat conduction heaters 52, which are composed of, for example, wire heaters and are provided in close contact with the heat sink 31 of the cooler 30. The heat transfer heaters 52 are respectively arranged on the front side and the back side of the cooler 30. The heat-conducting heater 52 is inserted between the two radiating fins 31 of the cooler 30 in the vertical direction, etc., closely adhering to the radiating fin 31, and heating the radiating fin 31 mainly by heat conduction.

Therefore, the refrigerator 10 can melt the frost adhering to the cooler 30 by causing the heater 51 and the heat conduction heater 52 to generate heat at the same time. However, the refrigerator 10 is not limited to the case where the heater 51 and the heat conduction heater 52 generate heat at the same time. In accordance with the frosting state of the cooler 30 and the like, any one of the heater 51 and the heat conduction heater 52 can be heated.

In the example of Fig. 6, in the upper heat sink group 32a, for both the front and rear sides of the cooler 30, every two layers, that is, between the two heat sinks 31 and the two heat sinks 31 arranged in the vertical direction , Configuration heat conduction heater 52. In addition, in the lower heat sink group 32b, for each of the front and rear sides of the cooler 30, each layer, that is, between the heat sink 31 and the heat sink 31 arranged in the vertical direction, a heat conduction heater 52 is arranged. However, the arrangement interval of the heat transfer heater 52 is not limited to the example in FIG. 6 and can be changed appropriately. In addition, the position of the heat conduction heater 52 on the front side of the cooler 30 and the position of the heat conduction heater 52 on the rear side of the cooler 30 may be shifted. In addition, the heat transfer heater 52 may be arranged only on any one of the front side and the rear side of the cooler 30.

In addition, at the time of defrosting, there is a concern that the water droplets from the cooler 30 may reach the heater 51. Therefore, the heater top cover 51a is arranged above the heater 51, that is, between the cooler 30 and the heater 51. By providing the heater top cover 51a, it is possible to prevent the water dripping from the cooler 30 from directly hitting the heater 51. The water dripping from the cooler 30 will be collected by the drain pan 55 at the lower part of the cooling chamber 100 and then drained from the drain 56.

The storage room back wall 24 is composed of a heat insulating material 24a and a vacuum heat insulating material 24b. That is, the freezer compartment return air path P ₅ is the storage compartment air duct 24a of the back wall covered by the heat insulating material 24. As shown in FIG. 6, the freezing chamber cold air C ₅ will return from the freezing chamber 5a flows into the inlet, through the return air passage P ₅ freezing chamber 5b flows into the cooler return port 30 from the freezer compartment, flows upward from below the subcooler 30. Send to various places through circulation fan 40.

Return air passage P ₅ 5n gap is formed in the freezing chamber, such that the melting frost water generated when the like generated inside the air passage 55 will be dropped to the drain pan. When the gap 5n larger, then returns freezing chamber cold air flows into the cooling chamber C ₅ from the gap 100 5n. Then, below the cooler 30, relatively much moisture and the refrigerator compartment return air-storage chamber C ₁ returns cool air C _4, and the relatively low temperature freezer compartment returns cool air will mix C _5, the cooler may make the junction 30 occurs Frost.

Therefore, the refrigerator 10 of the present embodiment 1 is provided with a cold air separation plate 70 made of metal, which is a different part from the back wall 24 of the storage compartment, in the part of the gap 5n. The refrigerator 10 by the separating plate 70 narrow air-gap 5n, suppressing the freezing chamber cold air returns into the cooling chamber 100 C _5.

In addition, the cold air separation plate 70 is arranged at a position where heat generated by the heater 51 is conducted. From this point of view, the refrigerator 10 suppresses deformation and the like caused by the heating of the heater 51 by making the material of the cold air separation plate 70 metal. In addition, the cold air separation plate 70 is made of metal and easily transfers heat, so frost and the like are easily melted. Therefore, the cold air separation plate 70 can be quickly defrosted by the heat from the heater 51 even when frost is formed.

As shown in Fig. 6, the partition plate 27 is formed by stacking a heat insulating material 27a and a vacuum heat insulating material 27b. The partition plate 25 and the partition plate 26 are constructed in the same manner as the partition plate 27. The main body back wall 22 is formed by laminating a vacuum heat insulating material 22b on the heat insulating material 22a.

Fig. 7 is an explanatory diagram showing the flow of cold air in the vegetable compartment of Fig. 1. With reference to Fig. 7, the flow of cold air in the vegetable compartment 4 will be described. The storage compartment back wall 24 is provided with a blow-out port 4c through which air cooled by the cooling compartment 100 is blown out on the upper front or upper side. In addition, in FIG. 7, the case where the blower outlet 4c is provided in the upper front surface of the storage room back wall 24 is illustrated. In addition, a storage room return port 4a for returning the air in the vegetable room 4 to the cooling room 100 is provided on the side surface below the storage room back wall 24. In other words, in the vegetable compartment 4, cold air is blown out from the outlet 4c of the storage compartment back wall 24, and the air in the vegetable compartment 4 is cooled to a set temperature. Then, the air in the vegetable compartment 4 that has been cooled will return to the cold air C ₄ as the storage compartment and return to the cooling compartment 100 from the storage compartment return port 4 a.

As described above, in the refrigerator 10 of the first embodiment, the refrigerating compartment return port 1b and the storage compartment return port 4b are provided below the lower end of the cooler 30, and the freezer compartment return port connecting the air passage of the storage compartment back wall 24 5b will be arranged above the lower end of the cooler 30. Therefore, the cold air blown out from the refrigerating compartment return port 1b and the storage compartment return port 4b passes through the cooler 30 from below to upward. In addition, the cold air blown out from the freezer compartment return port 5b flows into a position higher than the lower end of the cooler 30, and then passes through the cooler 30 upward. Thus, even if the vegetable compartment 4 is disposed in the upper case 5 of the freezing chamber can be suppressed relatively much moisture and the refrigerator compartment return air-storage chamber C ₁ C ₄ returns cool air, the relatively low temperature of the freezing chamber cold air returns C ₅ mixing. Therefore, it is possible to suppress an increase in the air path resistance caused by the frost formation of the cooler 30, and therefore it is possible to contribute more to the improvement of the cooling performance.

In addition, the refrigerating compartment return port 1b is provided on one side surface of the main body portion 20, and the storage compartment return port 4b is provided on the other side surface of the main body portion 20. That is, the refrigerating chamber cold air return duct returns C ₁ P ₁ through refrigerator compartment return port 30 from the refrigerating chamber 1b flows into the cooler. In addition, the storage compartment return cold air C _{4 flows into the cooler 30 from the storage compartment return port 4 a} located on the opposite side of the refrigerating compartment return port 1 b in the cooling compartment 100. Then, the refrigerating chamber cold air return the storage chamber C ₁ and C ₄ can return to the cool air flow upward from the lower side of the cooler 30, it is recycled to the fan 40 of each storage compartment. Thus, refrigerating cooler 30 can be separated from the cold air return portion C ₁ frost caused by frosting portion and the storage compartment C ₄ returns cool air caused by the cooler 30 can be prevented in an emphasis on the frosting, to balance Ground the cold air flow into the cooler 30.

In addition, in the height direction of the cooler of Patent Wenxi 1, the lower fin pitch is narrower than the upper fin pitch, which promotes the concentration of frost on the lower part and prevents frost from forming on the upper part of the fin. However, in the refrigerator of Patent Document 1, when frost is formed at the lower part of the cooler, the frost forms a block in the lower part, and the air path resistance to the air flowing into the lower part increases. In addition, in the refrigerator of Patent Document 1, a bypass air path is formed on at least one of the front side and the back side of the cooler. Therefore, even if the lower part of the cooler is clogged due to frost, the cool air is sent to the cooler. The upper part. However, the refrigerator of Patent Document 1 increases the air path resistance of the lower part of the cooler due to clogging caused by frost, and therefore it is necessary to widen the bypass air path. Therefore, much of the air sent to the cooler from below flows into the bypass air path, and the heat exchange with the cooler cannot be performed sufficiently, resulting in a problem of reduced cooling performance.

From this point of view, in the first embodiment, the fin pitch of the cooler 30 is wider in the lower part than in the upper part. Therefore, the lower side of the cooler 30 is not easily affected by frost. In other words, assuming that a relatively large amount of frost adheres to the lower part of the cooler 30, the clogging between the fins 31 due to frost formation is alleviated under the cooler 30, so that it is possible to suppress an increase in the impedance of the air path. Then, at least one group of heat dissipating fins 32 is relatively wide spacing of the lower, even if the refrigerating chamber cold air return to the storage chamber C ₁ and C ₄ cold air returns to the cooler 30 caused by frost is generated, it is possible to ensure that the cooler 30 The wind road below.

Here, the refrigerator 10, relatively much moisture and the refrigerator compartment return air-C _{1 4} into the storage chamber below the return cold air cooler 30 C, with the frost generated in the plurality of lower side than the upper side of the cooler 30. In this regard, in the refrigerator 10, the heater 51 is provided below the cooler 30 on the air path between the storage compartment back wall 24 and the main body back wall 22. Therefore, the refrigerator 10 can preferentially remove the frost below the cooler 30 by causing the heater 51 to generate heat, and can further suppress the air path resistance.

In addition, the refrigerator 10 has a heat-conducting heater 52 which is arranged close to the heat sink 31 and heats the heat sink 31. Therefore, the refrigerator 10 can cause at least one of the heater 51 and the heat transfer heater 52 to generate heat, thereby efficiently dissolving the frost adhering to the cooler 30.

Further, in the freezer compartment return air path P ₅ than at least the bottom of the cooler 30, the cool air is provided with a separating plate 70, to return the barrier freezing chamber cold air C ₅ flows into the cooler 30 below. Thus, the gap can be reduced 5N, to suppress the freezing chamber cold air returns into the cooling chamber 100 C _5. In addition, the cold air separation plate 70 is made of metal. Therefore, it is possible to suppress deformation and the like of the cold air separation plate 70 caused by the heating of the heater 51. In addition, due to the good thermal conductivity of metal, even if frost adheres to the cold air separation plate 70, the adhered frost can be quickly removed. [Implementation Type 2]

Fig. 8 is a schematic cross-sectional view illustrating the peripheral structure of the cooling chamber of the refrigerator in the second embodiment of the present invention. The entire structure of the refrigerator of the second embodiment is the same as that of the first embodiment, so the same reference numerals are used for the same constituent members, and the description is omitted.

2, the refrigerator of the present embodiment patterns 10 formed with a bypass air passage 80, rear wall 22 and the main body is provided at least one storage chamber 24 in the rear wall of the refrigerator compartment return air-storage chamber C ₁ and C ₄ through the cold air return .

Fig. 8 illustrates a case where the bypass air duct 80 is formed between the cooler 30 and the back wall 22 of the main body. That is, the refrigerator 10 has a bypass groove 81 that is partially disposed at a position opposite to the cooler 30 on the back wall 22 of the main body. Thereby, the gap between the cooler 30 and the back wall 22 of the main body is widened, and the bypass air path 80 is ensured.

More specifically, the bypass groove 81 is constituted by a lower inclined surface 81a, a flat surface 81b, and an upper inclined surface 81c. The downward inclined surface 81a is provided at a position facing the lower end of the cooler 30, and is formed obliquely from the front to the rear. The flat surface 81 b is provided above the downward inclined surface 81 a and is formed along the rear side surface of the cooler 30. The upper inclined surface 81c is provided above the flat surface 81b and below the upper end of the cooler 30, and is formed obliquely from the rear to the front.

As described above, the refrigerator 10 of the second embodiment forms the bypass air duct 80 by providing the bypass groove 81. Thus, since frost is assumed below cooler 30 and cause clogging between the fins 31, increasing the impedance of the air passage, because the refrigerator compartment return air-storage chamber C ₁ and C ₄ can be returned through the bypass cool air duct 80, so It is possible to prevent a decrease in cooling performance.

Here, Figure 8 illustrates the case where the main body back wall 22 is provided with a bypass groove 81, but it is not limited to this. The bypass groove 81 may also be provided on the storage compartment back wall 24, or may be provided on the main body back wall 22 and The back wall of the storage room has 24 sides. In other words, the bypass air duct 80 may be provided on at least one of the main body back wall 22 and the storage room back wall 24.

In addition, the above-mentioned embodiments are suitable specific examples in refrigerators, and the technical scope of the present invention is not limited to these aspects. For example, in the above description, a case where the refrigerator 10 has five storage compartments is exemplified, but it is not limited to this. The refrigerator 10 may have only a plurality of storage compartments of the refrigerator compartment 1, the vegetable compartment 4, and the freezer compartment 5. In addition, the refrigerator 10 may not be provided with at least one of the ice making compartment 2 and the switching compartment 3. In addition, the refrigerator 10 may have four storage compartments, or may have six or more storage compartments. In this case, the structure and arrangement of storage rooms other than the refrigerator compartment 1, the vegetable compartment 4, and the freezer compartment 5 can be selected in various ways.

Moreover, in the above description, it is exemplified that the vegetable compartment 4 is provided between the refrigerating compartment 1 and the freezing compartment 5 and is a storage compartment set to a lower temperature zone than the freezing compartment 5, but it is not limited to this. That is, a storage room provided between the refrigerator compartment 1 and the freezer compartment 5 and set to a lower temperature range than the freezer compartment 5 may be a storage room for other purposes than storing vegetables.

FIGS. 6 and 8 illustrate that the heat sink group 32 is a plurality of heat sinks 31 through which a row of heat pipe 33 penetrates, and the heat sinks 31 are arranged in a plurality of layers in the vertical direction, but it is not limited to this. The heat dissipation fin group 32 may be a plurality of heat dissipation fins 31 through which a row of the heat pipe 33 penetrates and are arranged in a plurality of layers in the vertical direction. In addition, in the above description, there are two types of fin pitches of the fin group 32 exemplified, but it is not limited to this, and there may be three or more types of fin pitches of the fin group 32. In this case, as the layer goes down, the fin pitch becomes wider. For example, when the heat sink group 32 has three types of heat sink pitches, the heat sink pitch of the lower layer may be the widest, and the heat sink pitch of the upper layer may be the narrowest. In addition, in the above description, the piping section 35 is exemplified by a plurality of heat transfer tubes 33 and a plurality of connecting tubes 34, but it is not limited to this, and the piping section 35 may be a plurality of heat transfer tubes 33 and a plurality of connecting pipes. The connecting pipe 34 is formed integrally.

1‧‧‧Refrigerator room 1b‧‧‧Refrigerator room return port 2‧‧‧Ice making room 2a‧‧‧Ice storage box 3‧‧‧Switching room 4‧‧‧Vegetable room 4a‧‧‧Storage room return port 4b‧ ‧‧Storage room return port 4c‧‧‧Blowout port 5‧‧‧Freezer compartment 5a‧‧‧Freezer compartment inlet 5b‧‧‧Freezer compartment return port 5c‧‧‧cold air supply outlet 5d‧‧‧blower outlet 5n‧‧ ‧Gap 10‧‧‧Refrigerator 11‧‧‧Refrigerator door 11a‧‧‧First door 11b‧‧‧Second door 12‧‧‧Ice room door 13‧‧‧Switching room door 14‧‧‧Vegetable room door 15‧‧‧Freezer door 20‧‧‧Main body 21‧‧‧Insulation wall 22‧‧‧Main body back wall 22a‧‧‧Insulation material 22b‧‧‧Vacuum insulation material 24‧‧‧Storage room back wall 24a‧‧‧Insulation material 24b‧‧‧Vacuum insulation material 25‧‧‧Partition plate 26‧‧‧Partition plate 27‧‧‧Partition plate 27a‧‧‧Insulation material 27b‧‧‧Vacuum insulation Material 30 ‧ ‧ Cooler 31 ‧ ‧ Heat sink 32 ‧ ‧ Heat sink group 32a ‧ ‧ Upper heat sink group 32 b ‧ ‧ Lower heat sink group 33 ‧ ‧ Heat pipe 34 ‧ ‧ Connecting pipe 35 ‧‧‧Piping section 40‧‧‧Circulating fan 51‧‧‧Heater 51a‧‧‧Heater cover 52‧‧‧Heat conduction heater 55‧‧‧Drain pot 56‧‧‧Drain 60‧‧‧Refrigerant circuit 60a‧‧‧Refrigerant piping 61‧‧‧Compressor 62‧‧‧Piping group 63‧‧‧Expander 70‧‧‧Air-conditioning separation plate 80‧‧‧Bypass wind path 81‧‧‧Bypass ditch 81a‧‧‧ inclined downward Surface 81b‧‧‧Flat surface 81c‧‧‧Upper inclined surface 100‧‧‧Cooling room C‧‧‧Returning air C ₁ ‧‧‧Refrigerating room returning cold air C ₄ ‧‧‧Storage room returning cold air C ₅ ‧‧‧Freezing Room return air conditioner P ₁ ‧‧‧Refrigerator room return air path P ₅ ‧‧‧Freezer room return air path Q ₅ ‧‧‧Freezer room sends out air path Ra, Rb‧‧‧area

Fig. 1 is a perspective view illustrating the appearance of the refrigerator according to Embodiment 1 of the present invention. Figure 2 is a front view of the refrigerator of Figure 1 viewed from the door side. Fig. 3 is a schematic cross-sectional view taken along line A-A in Fig. 2. Fig. 4 is a refrigerant circuit diagram of the refrigerator shown in Fig. 1. Fig. 5 is a schematic diagram showing the structure of the cooling chamber and its surroundings in Fig. 3. Fig. 6 is a schematic cross-sectional view taken along line B-B in Fig. 5. Fig. 7 is an explanatory diagram showing the flow of cold air in the vegetable compartment of Fig. 1. Fig. 8 is a schematic cross-sectional view illustrating the peripheral structure of the cooling chamber of the refrigerator in the second embodiment of the present invention.

1‧‧‧Refrigerator

2‧‧‧Ice Room

2a‧‧‧Ice storage box

4‧‧‧Vegetable Room

5‧‧‧Freezer

5a‧‧‧Freezer inlet

5b‧‧‧Freezer compartment return

5c‧‧‧Air conditioning outlet

5d‧‧‧Blowing outlet

10‧‧‧Refrigerator

11‧‧‧Refrigerator door

12‧‧‧Ice Chamber Door

14‧‧‧Vegetable room door

15‧‧‧Freezer door

20‧‧‧Main body

21‧‧‧Insulation wall

22‧‧‧Back wall of main body

25‧‧‧Partition plate

26‧‧‧Partition plate

27‧‧‧Partition plate

30‧‧‧Cooler

40‧‧‧Circulating fan

61‧‧‧Compressor

100‧‧‧Cooling room

C ₅ ‧‧‧The freezer compartment returns to air-conditioning

P ₅ ‧‧‧The freezer compartment returns to the wind path

Q ₅ ‧‧‧The freezer compartment sends out the wind path

Claims (9)

A refrigerator includes: a main body with a refrigerating chamber; a freezing chamber arranged on the lower side of the refrigerating chamber; arranged between the refrigerating chamber and the freezing chamber, set in a higher temperature zone than the freezing chamber, and A storage room with a back wall of the storage room on the back side; a cooler arranged behind the storage room on the air path between the back wall of the storage room and the back wall of the main body constituting the back of the main body to cool the inside of the main body Air; and a compressor arranged below the cooler, wherein the body portion is provided with: a refrigerating chamber return port, through which the air in the refrigerating chamber returns to the cooler; a storage chamber return port, in which the air in the storage chamber returns When the cooler passes through; and the freezer compartment return port, the air in the freezer compartment passes when returning to the cooler through the air path provided on the back wall of the storage compartment, the refrigerating compartment return port and the storage compartment return port are respectively provided in the ratio The lower end of the cooler is further below, the freezer compartment return port is arranged between the lower end and the upper end of the cooler, wherein the refrigerating compartment return port is provided on a side surface of the main body, and the storage compartment return port is provided on the On the other side of the main body, the refrigerator further includes a cold air separation plate, which is provided at least in the freezer return air path between the freezer inflow port formed above the freezer and the freezer return port. The cooler is further below, blocking the air blown from the return port of the freezer compartment, that is, the return cold air from the freezer compartment, from flowing into the lower part of the cooler. The refrigerator described in the first item of the scope of patent application, wherein: the cooler includes a group of radiating fins, composed of a plurality of radiating fins arranged at intervals in the left-right direction and arranged in multiple layers along the up-down direction, In the heat sink group, the interval between the heat sinks of each layer, that is, the distance between the heat sinks, the lower layer is wider than the upper layer. For example, the refrigerator described in the scope of the patent application, wherein: the cooler includes: a piping part, which is formed by arranging one or more heat pipes in multiple rows in the vertical direction; the heat sink group is composed of 1 or 2 rows The plurality of radiating fins penetrated by the heat pipe is composed of multiple layers arranged in the vertical direction. In the radiating fin group, the spacing between the radiating fins of each layer, that is, the fin spacing, the lower layer is larger than the upper one. The layer is wider. For the refrigerator described in item 2 or 3 of the scope of patent application, wherein: in the heat sink group, there are two kinds of intervals between the plurality of heat sinks, and at least one layer of the heat sink on the lower side has a relatively wide interval. The refrigerator described in item 4 of the scope of patent application, wherein: the freezer compartment return port is arranged opposite to the lower part of the heat sink group with the relatively narrow spacing between the heat sinks. For example, the refrigerator described in item 2 or 3 of the scope of the patent application further includes: a heat-conducting heater arranged close to the heat sink to heat the heat sink. The refrigerator according to any one of items 1 to 3 in the scope of the patent application, wherein: below the cooler on the air path between the back wall of the storage room and the back wall of the main body, a defroster for the cooler is provided Heater. The refrigerator according to any one of items 1 to 3 in the scope of patent application, wherein the cold air separation plate is made of metal. The refrigerator according to any one of items 1 to 3 in the scope of the patent application, wherein: a bypass air path is formed on at least one of the back wall of the storage room and the back wall of the main body, The bypass air path allows the air blown from the refrigerating compartment return port, that is, the refrigerating compartment return cold air, and the air blown from the storage compartment return port, that is, the storage compartment return cold air to pass through.

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