TW201938970A - refrigerator - Google Patents

Abstract

This refrigerator is provided with: a refrigeration chamber; a freezing chamber provided lower than the refrigeration chamber; and a storage chamber which is provided between the refrigeration chamber and the freezing chamber and is set to a higher temperature range than the freezing chamber. The refrigerator comprises a cooler which is disposed in an air path between a storage chamber rear wall on the rear surface side of the storage chamber and a main body rear wall constituting the rear surface of a main body part, and cools the air inside the main body part. The main body part is provided with: a refrigeration chamber return port through which the air in the refrigeration chamber passes when returning to the cooler; a storage chamber return port through which the air in the storage chamber passes when returning to the cooler; and a freezing chamber return port through which the air in the freezing chamber passes when returning to the cooler through an air path provided in the storage chamber rear wall. The refrigeration chamber return port and the storage chamber return port are each provided lower than the lower end of the cooler, and the freezing chamber return port is provided at a position between the lower end and the upper end of the cooler.

Description

refrigerator

The present invention relates to a refrigerator including a cooler.

In the past, refrigerators having a cooler behind a storage room were known. In such a refrigerator, a cooler and a fan are provided on an air path separated by a wall, and the cool air generated by the cooler is sent by the fan to a refrigerator containing a storage room. In other words, a cooling air circulation air path is formed in the refrigerator, and the temperature of the cooling air passing through the cooler rises due to the heat load of each part, and returns to the cooler again (for example, refer to Patent Document 1).

In the above-mentioned refrigerator, for example, the cold air containing a large amount of moisture may be frosted when it is returned to the cooler due to the moisture evaporated from the food stored in the refrigerator, or the moisture in the air invading from the outside of the store when the door is opened and closed. Frosting is a phenomenon in which when the surface temperature of a cooler that comes in contact with air becomes lower than the dew point temperature, moisture in the air condenses and accumulates on the surface of the cooler as ice crystals. The storage room, especially the cold air coming back from the refrigerator, usually contains a lot of water. When the surface of the cooler is frosted and continues to grow, blockage will occur between the fins of the cooler, increasing the air path resistance, and reducing the cooling performance.

Moreover, the refrigerator of patent document 1 is provided with the vegetable compartment in the lowermost stage, and the freezing compartment in the upper stage. Then, the return opening of the storage room from which the air returned from the vegetable room returns to the cooler is set on the ceiling of the vegetable room. The return opening of the freezer from which the air returned from the freezer returns to the cooler is provided on the rear wall of the freezer.
Prior 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 freezing compartment is reversed, the return opening of the storage compartment is provided on the back wall of the vegetable compartment, and the return opening of the freezing compartment is provided on the ceiling of the freezing compartment. In this way, the return 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 air from the freezer compartment with relatively low humidity and temperature will come from the lower end The lower side flows into the cooler. Therefore, above the cooler, the return air from the vegetable compartment and the return air from the freezer are mixed, and frost is formed on the radiating fins, resulting in an increase in air path resistance and a problem that the cooling performance is reduced. Moreover, the same problem as described above also occurs when other storage compartments set to a higher temperature zone than the freezer compartment are installed in the upper stage of the freezer compartment, not limited to the vegetable compartment.

An object of the present invention is to solve the above-mentioned problems, and to provide a refrigerator capable of improving the cooling performance of a cooler even when a storage compartment in a higher temperature zone than the freezer compartment is provided in the upper part of the freezer compartment.

A refrigerator according to the present invention includes a body portion, a cooler, and a compressor. The main body includes a refrigerating compartment, a freezer compartment disposed below the refrigerating compartment, a refrigerating compartment and a freezer compartment, a higher temperature zone than the freezer compartment, and a storage with a back wall of the storage compartment 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 body constituting the back surface of the main body portion, and cools the air inside the main body portion. The compressor is positioned below the cooler. The main body part is provided with a refrigerating compartment return port, and the air in the refrigerating compartment passes when it returns to the cooler; a storage compartment return port, and the air in the storage compartment passes when it returns to the cooler; The air path on the back wall passes when it returns to the cooler. The refrigerating compartment return opening and the storage compartment return opening are respectively provided below the lower end of the cooler. The return opening of the freezing chamber is provided between the lower end and the upper end of the cooler.

According to the present invention, the refrigerating compartment return opening and the storage compartment return opening are provided below the lower end of the cooler, and the refrigerating compartment return opening connecting the air path of the back wall of the storage compartment is provided above the lower end of the cooler. Therefore, the air from the refrigerator compartment and the vegetable compartment with relatively high water content 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. This makes it possible to improve the cooling performance of the cooler even when the storage compartment in a higher temperature zone than the freezer compartment is provided in the upper part of the freezer compartment.

[Implementation Mode 1]

FIG. 1 is a perspective view illustrating an appearance of a refrigerator according to a first embodiment of the present invention. Fig. 2 is a front view of the refrigerator of Fig. 1 as viewed from the door side. The overall structure of the refrigerator 10 according to the first embodiment will be described with reference to FIGS. 1 and 2. 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 up-down direction of the refrigerator 10 corresponds to the z-axis direction. That is, the front of the refrigerator 10 corresponds to the positive x-axis direction, and the upper portion of the refrigerator 10 corresponds to the positive z-axis direction.

The refrigerator 10 includes a main body portion 20 having a plurality of storage rooms as cooling targets. The main body portion 20 includes a refrigerating compartment 1 and a freezing compartment 5 provided below the refrigerating compartment 1. Further, the main body portion 20 is provided between the refrigerating compartment 1 and the freezing compartment 5, and has a vegetable compartment 4 as a storage compartment set in a lower temperature zone than the freezing compartment 5. More specifically, the refrigerator 10 illustrated in FIG. 1 has a plurality of storage compartments including a refrigerating compartment 1, an ice-making compartment 2, a switching compartment 3, a vegetable compartment 4, and a freezing compartment 5.

The refrigerating compartment 1 is provided at the uppermost stage of the main body portion 20 and is set in a refrigerating temperature zone. The freezer compartment 5 is provided at the lowermost stage of the main body portion 20 and is set in a freezing temperature zone. The vegetable compartment 4 is provided in the upper part of the freezing 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 disposed on the left side of the front, and the switching chamber 3 is disposed 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 storage box 2a. The switching chamber 3 can switch the set temperature over a wide range from a freezing temperature zone to a refrigerating temperature zone. That is, the switching room 3 switches the cooling temperature zone to, for example, a freezing temperature zone of about -18 ° C, such as a refrigerating temperature zone of about 3 ° C, such as a cold temperature zone of about 0 ° C, or a soft freezing temperature zone of about -7 ° C. And other temperature zones.

In front of the refrigerator compartment 1, a refrigerator compartment door 11 for opening and closing the refrigerator compartment 1 is provided. In the first figure, the refrigerator compartment door 11 is composed of a first door 11a and a second door 11b, and is a two-door (guanyin type) two door. However, the refrigerating compartment 11 is not limited to two doors of a double opening type, and may be one door of a single opening type.

The ice-making chamber 2, the switching chamber 3, the vegetable chamber 4, and the freezing chamber 5 are opened and closed by a pull-out door, respectively. That is, the ice-making chamber door 12 for opening and closing the ice-making chamber 2 is provided in front of the ice-making chamber 2. A switching room door 13 for opening and closing the switching room 3 is provided in front of the switching room 3. In front of the vegetable room 4, a vegetable room door 14 for opening and closing the vegetable room 4 is provided. A freezer compartment door 15 for opening and closing the freezer compartment 5 is provided in front of the freezer compartment 5. These pull-out doors can be opened and closed in the front-rear direction (direction of inward movement) of the refrigerator 10 by sliding a frame fixed to the door body relative to a rail formed horizontally 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. In the refrigerator 10, the refrigerator compartment door 11, the ice-making compartment door 12, the switching compartment door 13, the vegetable compartment door 14, the freezer compartment door 15, and the heat insulation wall 21 are insulated from the outside of the storehouse, that is, the outside air. The heat insulation wall 21 includes a main body back wall 22 constituting a back surface of the main body portion 20. The back surface of the vegetable room 4 is provided with a storage room back wall 24 which becomes a back wall 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.

A partition plate 25 is provided between the refrigerator compartment 1, the ice-making compartment 2, and the switching compartment 3. A partition plate 26 is provided between the ice-making room 2, the switching room 3, and the vegetable room 4. A partition plate 27 is provided between the vegetable compartment 4 and the freezing compartment 5.

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 sheet-and-tube heat exchanger, and cools the air sent from each storage room. The circulation fan 40 sends air cooled by the cooler 30 to each storage compartment in the refrigerator. The air cooled by the cooler 30 is sent to each storage room by the circulation fan 40. That is, the circulation fan 40 contributes to the low temperature maintenance of the temperature in the refrigerator. The air cooled by the cooler 30 and sent to each storage room is returned to the cooler 30 from each storage room and cooled. That is, the refrigerator 10 has a structure in which the air in the refrigerator is circulated to 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 so as not to contact the cooler 30. The heater 51 is a defrosting device provided for defrosting the cooler 30 and heating and removing frost attached to the cooler 30. The compressor 61 is provided at the lowermost part on the rear side of the refrigerator 10. The compressor 61 is a component of the refrigeration cycle included in the refrigerator 10 and has a function of compressing a refrigerant. The cooler 30 and the heater 51 are provided on the air path between the storage room 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 the bottom to the top. The air cooled in the cooling chamber 100 passes through the duct, and is supplied to the storage chambers from the air outlets provided in the storage chambers.

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 room back wall 24, and when the air of the freezer compartment 5 returns to the cooler 30, it passes through the freezer compartment return port 5b. As shown in FIG. 3, the freezer compartment inlet 5 a is provided below the lower end of the cooler 30. The freezer compartment return port 5b is provided between the lower end and the upper end of the cooler 30. The freezer compartment inlet 5a and the freezer compartment return opening 5b communicate with each other on the inner wall of the back wall 24 of the storage compartment.

That is, a freezer compartment return air path P ₅ is formed between the freezer compartment inlet 5a and the freezer compartment return port 5b. The freezer compartment inlet 5a flows in from the freezer compartment inlet 5a and returns from the freezer compartment _C5 flow. Too. Therefore, the freezing-chamber return cold air C ₅ flows into the freezing-chamber return air passage P ₅ from the freezing-chamber return inlet 5 a provided below the lower end of the cooler 30. Then, the refrigerating chamber returning cold air C ₅ passes through the freezing chamber returning air passage P ₅ , blows out from the refrigerating chamber returning port 5 b located above the lower end of the cooler 30, and flows into the upper part than the lower end of the cooler 30.

The cooling chamber 100 side of the storage room back wall 24 is provided above the upper end of the cooler 30 with a cold air supply port 5c. An outer wall above the freezer compartment 5 is provided with a blow-out port 5d further forward than the freezer compartment inlet 5a. The cold air blowing port 5c and the blowing port 5d communicate with each other inside 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 the doors (11 to 15) of each storage room are opened and closed, outside air containing a large amount of moisture may enter each storage room. Generally, the refrigerator compartment 1 is opened and closed by the user more frequently than the freezer 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. Therefore, when the refrigerator 10 is operated for a long period of time, and the refrigerating compartment containing a large amount of moisture returns to the cold air C ₁ to exchange heat with the cooler 30, the surface of the cooler 30 may be frosted.

FIG. 4 is a refrigerant circuit diagram of the refrigerator of FIG. 1. FIG. 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 pipe 60 a, and a refrigerant such as isobutane is circulated therein.

The compressor 61 heat-insulates and compresses the refrigerant to make it a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant flowing from the compressor 61 is directed to the piping group 62 buried in the heat insulation wall 21 provided in the refrigerator box, and heat is radiated in the piping group 62 to become a liquid refrigerant. After that, the liquid refrigerant flowing out from 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. The gas-liquid two-phase refrigerant that has flowed into the cooler 30 absorbs the heat of the return air C during heat exchange with the return air C, and becomes a gas and returns to the compressor 61. The air that is absorbed by the cooler 30 and the temperature drops is sent to the refrigerator by the circulation fan 40. In this way, the refrigerant circuit 60 of the refrigerator 10 performs a cooling operation so that the air in the refrigerator is circulated and cooled. The return air C includes refrigerating compartment return air C ₁ , storage compartment return cool air C ₄ , and freezer compartment return cool air C ₅ .

FIG. 5 is a schematic view showing the structure of the cooling chamber and its surroundings in FIG. 3. That is, FIG. 5 shows the cooler 30 and its surrounding structure viewed from the front side. Fig. 6 is a schematic cross-sectional view taken along the line B-B in Fig. 5. The structure of the cooler 30 and the air passage will be specifically described with reference to FIGS. 5 and 6. As described above, the cooling chamber 100 is a space between the storage chamber back wall 24 and the main body back wall 22, and the circulation fan 40, the cooler 30, and the heater 51 are accommodated therein.

As shown in FIG. 5, a refrigerating compartment return air path P _{1 is} formed on one side of the cooling chamber 100 in the main body portion 20, and the refrigerating compartment returns cool air C _{1 to} pass. Then, the main body portion 20 is provided with a refrigerating compartment return opening 1b, and the air in the refrigerating compartment 1 passes when it returns to the cooler 30. The refrigerating compartment return opening 1 b is provided at a portion below one side of the cooling compartment 100 in the left-right direction below the lower end of the cooler 30. In other words, the refrigerating compartment returning cool air C ₁ is the air blown out from the refrigerating compartment return opening 1 b and passes through the cooler 30 from the bottom to the top.

Moreover, the main body part 20 is provided with a storage compartment return opening 4b, and the air of the vegetable compartment 4 passes through when it returns to the cooler 30. The storage compartment return opening 4b is provided on the other side surface in the left-right direction of the cooling chamber 100 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, as described above, the freezer compartment return port 5b is provided between the lower end and the upper end of the cooler 30. 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。 30. Therefore, it is possible to suppress an increase in the resistance of the air path due to the frost formation of the cooler 30, and thus it is possible to improve the cooling performance of the cooler 30.

The refrigerating compartment return opening 1b is provided on one side of the main body portion 20, and the storage compartment return opening 4b is provided on the other side of the main body portion 20. That is, the storage compartment return opening 4b is provided on the side of the main body portion 20 opposite to the refrigerating compartment return opening 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 It is possible to concentrate on the other 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 FIG. 5, the frost caused by the refrigerating compartment returning to the cold air C ₁ can be concentrated on the positive side of the y-axis, and the frost due to the moisture contained in the storage compartment returning to the cold air C ₄ can be concentrated on the negative side of the y-axis. .

The cooler 30 includes one or a plurality of heat transfer tubes 33 in which a plurality of piping portions 35 are arranged in the vertical direction. In the piping section 35 illustrated in FIG. 6, three heat transfer pipes 33 arranged in the front-rear direction are arranged in eight rows in the vertical direction. The piping section 35 includes a plurality of U-shaped connecting pipes 34. That is, in the piping portion 35, a plurality of heat transfer pipes 33 are arranged along the front-rear direction and the up-down direction, and two ends of the heat transfer pipes 33 adjacent to each other in the up-down direction are connected by the connecting pipe 34. Thereby, as shown in FIG. 5, the integrated piping part 35 is formed.

Further, the cooler 30 includes a heat sink group 32 in which a plurality of heat sinks 31 arranged in the left-right direction are arranged in a plurality of layers along the up-down direction. In the heat sink group 32, a plurality of heat sinks 31 that pass through one or two rows of heat pipes 33 are arranged in a plurality of layers in the vertical direction. 5 and 6 illustrate a heat sink group 32, in which one row of heat pipes 33, that is, a plurality of heat sinks 31 penetrated by three heat pipes 33 arranged in the front-rear direction, are arranged along the upper and lower sides. The directions are 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 so that the interval between the respective heat sinks 31 is fixed, that is, the distance between the heat sinks is fixed. 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 distance between the lower heat sinks in the heat sink group 32 is wider than the distance between the upper heat sinks. 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 kinds of heat sink pitches, and the heat sink pitch of at least one layer on the lower side is relatively wide.

In the heat sink group 32 illustrated in FIG. 5, the pitch of the heat sinks in the two lower layers is wider than the pitch of the heat sinks in the upper 6 layers. That is, as shown in FIG. 5, the heat sink group 32 is a heat sink group 32 a located above the area Ra above the cooler 30 and a heat sink located below the area Rb located below the cooler 30. Group 32b. Then, the interval between the fins 31 included in the upper fin group 32a is wider than the interval between the fins 31 included in the lower fin 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 blockage between the fins 31 is also relieved. Therefore, it is possible to suppress an increase in air path impedance. Moreover, in the first embodiment, the freezer compartment return opening 5b and the upper fin group 32a having a relatively narrow fin distance among the fin groups 32 are arranged to face each other. Therefore, it is possible to suppress frost from forming below the cooler 30 and to ensure that the refrigerating compartment returns the cold air C _{5 to} pass through the area inside the cooler 30. Therefore, it can contribute to the improvement of heat exchange efficiency.

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

Therefore, the refrigerator 10 can melt the frost attached to the cooler 30 by causing the heater 51 and the heat-conducting 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-conducting heater 52 generate heat simultaneously. Depending on the frost state of the cooler 30 or the like, any one of the heater 51 and the heat-conducting heater 52 may generate heat.

In the example shown in FIG. 6, in the upper fin group 32 a, two layers of the front and rear sides of the cooler 30 are arranged between two fins 31 and two fins 31 in the vertical direction. ， Configure a thermally conductive heater 52. In the lower heat sink group 32b, a heat transfer heater 52 is disposed on each of the front side and the rear side of the cooler 30, that is, between the heat sink 31 and the heat sink 31 in the vertical direction. However, the arrangement interval of the heat-conducting heater 52 is not limited to the example of FIG. 6, and can be appropriately changed. The position of the heat transfer heater 52 on the front side of the cooler 30 and the position of the heat transfer heater 52 on the rear side of the cooler 30 may be shifted. In addition, the heat-conducting heater 52 may be arranged only on any one of the front side and the rear side of the cooler 30.

In addition, during defrosting, there is a possibility that water droplets dripped from the cooler 30 may reach the heater 51. Therefore, a heater top cover 51a is disposed 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 dripped from the cooler 30 is collected by the drain pan 55 in the lower part of the cooling chamber 100 and then discharged from the drain ditch 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 return air path P ₅ is an air path covered by the heat insulating material 24 a in the back wall 24 of the storage room. As shown in FIG. 6, the returning refrigerated air C ₅ flows into the refrigerating compartment inlet 5a, passes through the refrigerating compartment return air path P ₅ , flows into the cooler 30 from the refrigerating compartment return opening 5 b, and flows through the cooler from below to above. 30, sent to each place through the circulation fan 40.

A gap 5n is formed in the return air path P _{5 of the} freezer compartment, so that water generated when the frost and the like generated in the air path melts down to the drain pan 55. When the gap 5n is relatively large, the returning cold air C ₅ from the freezing chamber flows into the cooling chamber 100 from the gap 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, in the refrigerator 10 according to the first embodiment, a metal cold air separation plate 70 made of a different component from the storage room back wall 24 is provided in 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.

The cold air separation plate 70 is disposed at a position where heat is generated by the heater 51. In this regard, the refrigerator 10 suppresses deformation and the like caused by heating of the heater 51 by making the material of the cold air separation plate 70 a metal. In addition, since the cold air separation plate 70 is made of metal and easily transmits heat, frost and the like are easily melted. Therefore, it is assumed that 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 laminating a heat insulating material 27 a and a vacuum heat insulating material 27 b. The partition plate 25 and the partition plate 26 are configured in the same manner as the partition plate 27. The main body back wall 22 is formed by laminating the 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. The flow of cold air in the vegetable compartment 4 will be described with reference to FIG. 7. The storage chamber back wall 24 is provided with an outlet 4c for blowing out the air cooled by the cooling chamber 100 on the upper front side or the upper side surface. In addition, FIG. 7 illustrates a case where the air outlet 4c is provided on the front surface above the storage room back wall 24. A storage chamber return port 4 a for returning air in the vegetable compartment 4 to the cooling chamber 100 is provided on a side surface below the storage chamber back wall 24. That is, in the vegetable compartment 4, cold air is blown out from the outlet 4c of the back wall 24 of the storage compartment, and the air in the vegetable compartment 4 is cooled to a set temperature. Then, the air in the cooled vegetable compartment 4 is returned as cold air C ₄ as the storage compartment, and returns to the cooling compartment 100 from the storage compartment return opening 4 a.

As described above, in the refrigerator 10 according to the first embodiment, the refrigerating compartment return opening 1b and the storage compartment return opening 4b are provided below the lower end of the cooler 30, and the refrigerating compartment return opening is connected to the air path of the back wall 24 of the storage compartment. 5b is provided above the lower end of the cooler 30. Therefore, the cold air blown from the refrigerating compartment return opening 1b and the storage compartment return opening 4b passes through the cooler 30 from the bottom to the top. In addition, the cold air blown out from the freezer return opening 5b flows into a position located above the lower end of the cooler 30, and then passes upward through the cooler 30. 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 air path resistance caused by frosting of the cooler 30, and thus it is possible to contribute more to an improvement in cooling performance.

The refrigerating compartment return opening 1b is provided on one side of the main body portion 20, and the storage compartment return opening 4b is provided on the other side of the main body portion 20. That is, the refrigerating compartment returning cold air C ₁ passes through the refrigerating compartment returning air path P ₁ , and flows into the cooler 30 from the refrigerating compartment returning opening 1 b. The storage room return cool air C ₄ flows into the cooler 30 from the storage room return opening _{4 a} located on the side opposite to the refrigerating room return opening 1 b in the cooling room 100. Then, the refrigerating compartment returning cold air C ₁ and the storage compartment returning cold air C ₄ flow from the lower part of the cooler 30 to the upper part, and are sent to each storage room by the circulation fan 40. Therefore, it is possible to separate the frosted part caused by the refrigerating compartment returning cold air C ₁ from the refrigerating compartment 30 and the frosted part caused by the returning cool air C ₄ from the storage compartment, so that the frosting in the cooler 30 can be prevented from being biased at one place, and the balance can be balanced Ground cold air flows into the cooler 30.

In addition, in the cooler of Patent Literature 1 in the height direction, the pitch of the lower fins is narrower than the pitch of the upper fins, thereby promoting the concentration of frost on the lower part and preventing frost from forming on the upper part. However, when the refrigerator of Patent Document 1 is frosted toward the lower part of the cooler, frosting causes clogging at the lower part, and the air path resistance to the air flowing into the lower part increases. Further, in the refrigerator of Patent Document 1, a bypass air path is formed in at least one of the front side and the back side of the cooler. Therefore, even if the lower part of the cooler is frosted and clogged, cold 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, so the bypass air path must be widened. 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, leading to a problem that the cooling performance is reduced.

From this point of view, in the first embodiment, the distance between the fins of the cooler 30 at the bottom is wider than at the top. Therefore, the lower side of the cooler 30 is not easily affected by frost. That is, it is assumed that a relatively large amount of frost adheres to the lower part of the cooler 30, and the clogging between the fins 31 caused by the frost is alleviated under the cooler 30, so that an increase in the impedance of the air passage can be suppressed. Then, the space between the fins of at least one layer below the fin group 32 is relatively wide, so that even if the refrigerating compartment returns the cold air C ₁ and the storage compartment returns the cold air C ₄ and frost is generated in the cooler 30, the Windy 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 room back wall 24 and the main body back wall 22. Therefore, the refrigerator 10 can preferentially remove frost under the cooler 30 by generating heat from the heater 51, and can further suppress the air path impedance.

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

In addition, at least below the cooler 30 in the return air passage P ₅ of the freezing compartment, a cold air separation plate 70 is provided to block the return of the refrigerating cold air C _{5 from} flowing into the cooler 30 below. Therefore, the gap 5n can be reduced, and the return of the cooling air C ₅ from the freezing compartment to the cooling compartment 100 can be suppressed. 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 the metal, even when the frost adheres to the cold air separation plate 70, the adhered frost can be quickly removed.
[Implementation Mode 2]

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

In the refrigerator 10 according to the second embodiment, a bypass air passage 80 is formed, and at least one of the main body back wall 22 and the storage room back wall 24 is provided, so that the refrigerating compartment returns to the cold air C ₁ and the storage compartment returns to the cold air C _4. .

FIG. 8 illustrates a case where the bypass air passage 80 is formed between the cooler 30 and the main body back wall 22. That is, the refrigerator 10 has a bypass groove 81 that is partially provided at a position of the main body back wall 22 facing the cooler 30. Thereby, the gap between the cooler 30 and the main body back wall 22 is widened, and the bypass air path 80 is ensured.

More specifically, the bypass groove 81 is configured by a lower inclined surface 81a, a flat surface 81b, and an upper inclined surface 81c. The lower inclined surface 81 a 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 lower 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 according to the second embodiment forms a bypass air passage 80 by providing a bypass groove 81. Therefore, it is assumed that the frost is below the cooler 30 and the blockage between the fins 31 causes the impedance of the air path to increase. Since the refrigerating compartment returns the cold air C ₁ and the storage compartment returns the cold air C ₄ to pass the bypass air path 80, It is possible to prevent a decrease in cooling performance.

Here, FIG. 8 illustrates the case where the main body back wall 22 is provided with a bypass groove 81, but the invention is not limited to this. The bypass groove 81 may be provided on the storage room back wall 24, or on the main body back wall 22 and Both sides of the back wall 24 of the storage room. In other words, the bypass air path 80 may be provided in 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 the refrigerator, and the technical scope of the present invention is not limited to these aspects. For example, the above description has exemplified the case where the refrigerator 10 has five storage compartments, but the present invention is not limited to this. The refrigerator 10 may have only a plurality of storage compartments including a refrigerator compartment 1, a vegetable compartment 4, and a freezing compartment 5. Further, the refrigerator 10 may not be provided with at least one of the ice making chamber 2 and the switching chamber 3. The refrigerator 10 may have four storage rooms, or may have six or more storage rooms. In this case, the structure and arrangement of the storage compartments other than the refrigerating compartment 1, the vegetable compartment 4, and the freezing compartment 5 can be variously selected.

In the above description, it has been 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 is not limited thereto. That is, the storage room provided between the refrigerator compartment 1 and the freezer compartment 5 and set to a lower temperature zone than the freezer compartment 5 may be a storage room for other purposes than vegetables.

6 and 8 illustrate that the fin group 32 is a plurality of heat radiating fins 31 penetrating through one row of the heat transfer tubes 33 and arranged in a plurality of layers in the vertical direction, but it is not limited to this. The heat radiation fin group 32 may be a plurality of heat radiation fins 31 penetrating through one row of the heat transfer tubes 33 and arranged in a plurality of layers in the vertical direction. In the above description, two types of fin pitches of the fin group 32 are exemplified. However, the present invention 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 lower layer becomes, the wider the pitch of the fins becomes. For example, when there are three types of fin pitches in the fin group 32, the fin pitch of the lower layer may be the widest, and the fin pitch of the upper layer may be the narrowest. The above description has exemplified the case where the piping unit 35 is composed of a plurality of heat transfer pipes 33 and a plurality of connecting pipes 34, but the present invention is not limited to this. The connection pipe 34 is integrally formed.

1‧‧‧ freezer

1b‧‧‧ Refrigerator return

2‧‧‧ ice making room

2a‧‧‧ Ice storage box

3‧‧‧ Switch Room

4‧‧‧ Vegetable Room

4a‧‧‧ Storage room return

4b‧‧‧ Storage room return

4c‧‧‧blowout

5‧‧‧ freezer

5a‧‧‧Freezer inlet

5b‧‧‧Freezer return

5c‧‧‧Air-conditioning air outlet

5d‧‧‧Blow Out

5n‧‧‧Gap

10‧‧‧ refrigerator

11‧‧‧Refrigerator door

11a‧‧‧The first door

11b‧‧‧The second door

12‧‧‧ Ice door

13‧‧‧ switch room door

14‧‧‧Vegetable room door

15‧‧‧freezer door

20‧‧‧Body

21‧‧‧Insulation wall

22‧‧‧Body wall

22a‧‧‧Insulation

22b‧‧‧Vacuum insulation material

24‧‧‧ Back wall of storage room

24a‧‧‧Insulation

24b‧‧‧Vacuum insulation material

25‧‧‧ divider

26‧‧‧ divider

27‧‧‧ divider

27a‧‧‧Insulation

27b‧‧‧Vacuum insulation material

30‧‧‧ cooler

31‧‧‧ heat sink

32‧‧‧ heat sink group

32a‧‧‧ Upper heat sink group

32b‧‧‧ underside heat sink group

33‧‧‧Heat pipe

34‧‧‧Connecting tube

35‧‧‧Piping Department

40‧‧‧circulating fan

51‧‧‧heater

51a‧‧‧heater top cover

52‧‧‧Conductive Heater

55‧‧‧Drain pan

56‧‧‧drain

60‧‧‧Refrigerant circuit

60a‧‧‧Refrigerant piping

61‧‧‧compressor

62‧‧‧Piping Group

63‧‧‧Expander

70‧‧‧ cold air separation plate

80‧‧‧ Bypass Wind Road

81‧‧‧Bypass

81a‧‧‧ below inclined surface

81b‧‧‧ flat surface

81c‧‧‧Upward inclined surface

100‧‧‧cooling room

C‧‧‧ return air

C ₁ ‧‧‧ Refrigerator returns air-conditioning

C ₄ ‧‧‧ Storage room returns air-conditioned

C ₅ ‧‧‧ Freezer returns air-conditioning

P ₁ ‧‧‧ Refrigerator returns to the air path

P ₅ ‧‧‧ Freezer returns to the wind path

Q ₅ ‧‧‧ Free air delivery from freezer

Ra, Rb‧‧‧ Field

FIG. 1 is a perspective view illustrating an appearance of a refrigerator according to a first embodiment of the present invention.

Fig. 2 is a front view of the refrigerator of Fig. 1 as 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 of FIG. 1. FIG.

FIG. 5 is a schematic view 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 a peripheral structure of a cooling chamber of a refrigerator according to a second embodiment of the present invention.

Claims (11)

A refrigerator includes: The main body part has a refrigerating compartment; a freezer compartment provided below the refrigerating compartment; a space between the refrigerating compartment and the freezer compartment; a higher temperature zone than the freezer compartment; and a storage compartment on the back Storage room on the back wall; A cooler arranged behind the storage chamber on the air path between the back wall of the storage chamber and the back wall of the main body constituting the back of the main body, cooling the air inside the main body; and The compressor is placed below this cooler, The body part is provided with: Refrigerator compartment return opening, the air of the refrigerator compartment passes when returning to the cooler; A storage compartment return opening through which air from the storage compartment passes when returning to the cooler; and Freezing chamber return port, the air of the freezing chamber passes through the air path provided on the back wall of the storage chamber when returning to the cooler, The refrigerating compartment return opening and the storage compartment return opening are respectively disposed below the lower end of the cooler, The refrigerating compartment return opening is provided at a position between the lower end and the upper end of the cooler. The refrigerator as described in the first scope of the patent application, wherein: The refrigerating compartment return opening is disposed on a side of the body portion, The storage compartment return opening is provided on the other side of the body portion. The refrigerator as described in the first scope of the patent application, wherein: The cooler includes a heat sink group, which is composed of a plurality of heat sinks arranged at intervals in the left-right direction along a vertical direction, In the heat sink group, the interval between the heat sinks in each layer, that is, the heat sink distance, the lower layer is wider than the upper layer. The refrigerator as described in the first patent application scope, wherein: The cooler includes: The piping section is composed of one or a plurality of heat transfer tubes arranged in a plurality of rows in the vertical direction; The heat sink group is composed of a plurality of heat sinks arranged in one or two rows by the heat pipe, and a plurality of layers are arranged in the vertical direction. In the heat sink group, the interval between the heat sinks in each layer, that is, the heat sink distance, the lower layer is wider than the upper layer. The refrigerator according to item 3 or 4 of the scope of patent application, wherein: In the heat sink group, there are two kinds of intervals between the plurality of heat sinks. The distance between the heat sinks of at least one layer on the lower side is relatively wide. The refrigerator according to item 5 of the scope of patent application, wherein: The return opening of the freezer compartment is disposed below the portion of the fin group in which the distance between the fins is relatively narrow. Refrigerators as described in item 3 or 4 of the scope of patent application, including: The heat conducting heater is arranged close to the heat sink and heats the heat sink. The refrigerator according to any one of claims 1 to 4, in which: A heater for defrosting the cooler is provided below the cooler on the air path between the back wall of the storage room and the back wall of the main body. The refrigerator according to any one of claims 1 to 4 of the patent application scope further includes: A cold air separating plate is provided at least below the cooler return air path between the freezer return opening and the freezer return air passage formed between the freezer return and the freezer return opening, and blocks the return from the freezer return The blown air, which is the cold air returned from the freezer, flows below the cooler. The refrigerator according to item 9 of the scope of patent application, wherein the cold air separation plate is made of metal. The refrigerator according to any one of claims 1 to 4, in which: A bypass wind path is formed on at least one of the back wall of the storage room and the back wall of the body, The bypass air path allows the air blown from the refrigerating compartment return port, that is, the refrigerated compartment return cool air, and the air blown from the storage compartment return port, that is, the return return cool air from the storage compartment to pass.