WO2018131076A1

WO2018131076A1 - Refrigerator

Info

Publication number: WO2018131076A1
Application number: PCT/JP2017/000505
Authority: WO
Inventors: 中津　哲史
Original assignee: 三菱電機株式会社
Priority date: 2017-01-10
Filing date: 2017-01-10
Publication date: 2018-07-19
Also published as: CN108286854B; JPWO2018131076A1; HK1256702A1; CN108286854A; TWI716636B; AU2017392447B2; TW201825844A; JP6752297B2; AU2017392447A1; CN207515331U

Abstract

A refrigerator (1) is provided with: a thermal insulation casing (19); a machine room (90) which is formed by causing a lower back surface portion of the thermal insulation casing to be depressed inwards and in which a compressor is disposed; a cooler room (27) which is formed above the machine room and in the thermal insulation casing and in which a cooler (14) for generating cold air is disposed; a water receiving unit (81) which is provided below the cooler in the cooler room and which receives water from the cooler; and a discharge channel (82) having an inlet (83) provided to the water receiving unit and an outlet (84) protruded to the machine room, the discharge channel penetrating a thermal insulation wall (99) intervened between the cooler room and the machine room so as to cause the cooler room and the machine room to communicate. On the inlet side, a cross-sectional area of the discharge channel is gradually reduced toward a downstream side, and a center position of the cross section approaches a back surface side. The discharge channel is configured integrally from the inlet to the outlet. As a result, it is possible to provide a refrigerator with good water discharge performance while maintaining thermal insulation.

Description

refrigerator

The present invention relates to a refrigerator having a drainage channel.

In some conventional refrigerators, a water receiving portion (drip tray) is installed below the cooler, and a drainage path that penetrates the heat insulating wall is provided below the drip tray (see, for example, Patent Document 1 and Patent Document 2). ). Patent Document 1 discloses a drainage path provided below the vertical line with respect to the cooler, and Patent Document 2 discloses a drainage path outlet from the ceiling of the machine room provided below the cooler room. The structure which protrudes is disclosed. When the drainage route is to be secured at the shortest distance, the configuration as described in the above patent document is suitable.

By the way, refrigerators are required to be space-saving and large-capacity and energy-saving. Therefore, for example, there is a refrigerator that uses a vacuum heat insulating material excellent in heat insulating properties for a part of the heat insulating wall.

JP 2003-56972 A JP 2003-83668 A

In particular, the refrigerator of Patent Document 2 is provided with a machine room at the lower back and a cooler room directly above the machine room. It may deteriorate and cooling capacity may decrease. On the other hand, it is conceivable to use the above vacuum heat insulating material as part of the heat insulating material to ensure the heat insulating performance, but in this case, the drainage path from the drip tray is largely curved to avoid the vacuum heat insulating material. To do. For this reason, the drainage path needs to be provided with a connecting portion inside the foam heat insulating material filled around the vacuum heat insulating material. Further, for example, as in Patent Document 1, even in a configuration in which the drainage path is secured at the shortest distance, the drainage path may be configured by connecting a plurality of parts for reasons such as ease of molding. Thus, in the structure which provides a connection part in the middle of a waste_water | drain path | route, when using for a long term, the molten water adhering to the connection part inside a waste_water | drain path | route penetrates in a foaming heat insulating material gradually by a capillary phenomenon. And a foaming heat insulating material changes to the swelling state which hold | maintains a water | moisture content inside with time. The moisture inside the heat insulating material does not evaporate spontaneously, and the swollen foam heat insulating material has a heat capacity that is increased by the water. Therefore, the swollen foam heat insulating material becomes a temperature equivalent to the freezing temperature, freezes water adhering to the connection part of the drainage path, and the frozen ice mass gradually grows as a core to block the drainage path. As a result, the melted water generated by the defrosting operation may not be discharged into the machine room but may be discharged into the refrigerator, causing water leakage in the cabinet.

As described above, in the drainage path provided with the connection portion in the heat insulating material, the molten water generated at the time of defrosting penetrates into the heat insulating material from the connection portion, and freezing in the drainage path occurs. In addition, when there is a drainage path between the drip tray at the bottom of the cooler and the machine room at the bottom of the back of the refrigerator, it is impossible to dispose the vacuum heat insulating material inside the heat insulating material, and the cooler that requires the most heat insulation Insulation performance is reduced at the boundary between the chamber and the machine room. As a result, the energy saving performance of the refrigerator deteriorates or the machine room top surface is exposed.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a refrigerator that achieves both performance and quality.

The refrigerator according to the present invention includes an inner box and an outer box, a heat insulating box having a heat insulating material installed in a space between the inner box and the outer box, and a lower back portion of the heat insulating box inside. A machine room in which a compressor is disposed, a cooler room formed in the heat insulation box above the machine room, and a cooler for generating cool air is disposed; and The cooler chamber is provided below the cooler and receives a water from the cooler, and an inlet is installed in the water receiver, so that the cooler chamber and the machine chamber communicate with each other. And a drainage path that passes through a heat insulating wall interposed between the machine room and an outlet projecting into the machine room, and the cross-sectional area increases as the inlet side of the drainage path proceeds downstream. And has a shape in which the center position of the cross section approaches the back side, Water pathway are those configured integrally from said inlet to said outlet.

According to the refrigerator of the present invention, the drainage path is closer to the back side of the refrigerator while the inner diameter is reduced from the inlet to the outlet, so in the heat insulating wall between the cooler room and the machine room, A front area is widely secured, and a vacuum heat insulating material can be installed in the secured area. Therefore, the refrigerator can increase the heat insulation performance by increasing the installation area of the vacuum heat insulating material. In addition, since the drainage path is integrally formed from the inlet to the outlet, the penetration of moisture from the drainage path to the heat insulating material is suppressed, and the probability that the drainage path is blocked can be reduced. Thus, the refrigerator can improve drainage while maintaining heat insulation.

It is an external appearance perspective view which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the refrigerant circuit and air circulation path | route of the refrigerator which concern on Embodiment 1 of this invention. It is side surface sectional drawing which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a schematic block diagram of the machine room of the back surface of the refrigerator which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view which shows the structure of the heat insulation box which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view which shows the state by which the member of the heat insulation box which concerns on Embodiment 1 of this invention was fixed. It is a fragmentary sectional view which shows the 1st example of a structure of the heat insulation box which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view which shows the 2nd example of a structure of the heat insulation box which concerns on Embodiment 1 of this invention. It is a partial explanatory view showing the 3rd example of the composition of the heat insulation box concerning Embodiment 1 of the present invention. It is explanatory drawing which shows the lower part periphery of the refrigerator which concerns on Embodiment 1 of this invention. It is side surface sectional drawing which shows the structure of the vegetable room periphery which concerns on Embodiment 1 of this invention. It is front sectional drawing which shows the back wall seen from the vegetable compartment which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the refrigerator compartment blowing air path of the refrigerator which concerns on Embodiment 1 of this invention, and the return air path of the refrigerator compartment 2. As shown in FIG. It is a front view which shows the example of installation of the air path heater of the refrigerator which concerns on Embodiment 1 of this invention. It is a front view which shows another example of installation of the air path heater of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the ice making chamber blowing air path and ice making chamber return air path of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the switching chamber blowing air path and switching room return air path of the refrigerator which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the freezer compartment blowing air path of the refrigerator which concerns on Embodiment 1 of this invention, and the return air path of the freezer compartment. It is a schematic sectional drawing which shows the 1st example of a structure of the storeroom partition which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing which shows the 2nd example of a structure of the storeroom partition which concerns on Embodiment 1 of this invention. It is side surface sectional drawing which shows the 1st example of the wall surface structure of the vegetable room periphery which concerns on Embodiment 1 of this invention. It is side surface sectional drawing which shows the 2nd example of the wall surface structure of the vegetable room periphery which concerns on Embodiment 1 of this invention. It is side surface sectional drawing which shows the 3rd example of the wall surface structure of the vegetable room periphery which concerns on Embodiment 1 of this invention. It is front sectional drawing which shows the 1st example of the back wall seen from the vegetable compartment which concerns on Embodiment 1 of this invention. It is front sectional drawing which shows the 2nd example of the back wall seen from the vegetable compartment which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows arrangement | positioning of the heat retention heater of the vegetable compartment which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows arrangement | positioning of the heat radiating pipe of the vegetable compartment which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the connection relation of the heat radiating pipe of the vegetable compartment which concerns on Embodiment 1 of this invention, and a refrigerant circuit. It is a figure which shows the flow volume characteristic by the side of the outlet pipe which is not connected to the heat radiating pipe to the vegetable compartment in the flow-path switching three-way valve which concerns on Embodiment 1 of this invention. It is a schematic block diagram of the flow-path switching three-way valve which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the flow-path formation state with respect to STEP of the rotation gear in the flow-path switching three-way valve which concerns on Embodiment 1 of this invention. It is a figure which shows the partial side surface sectional drawing which shows the structure of a part of cooler room | chamber and machine room which concern on Embodiment 1 of this invention. It is a schematic plan view which shows the 1st example of a structure of the drip tray which concerns on Embodiment 1 of this invention. It is a schematic plan view which shows the 2nd example of a structure of the drip tray which concerns on Embodiment 1 of this invention. It is a rear view which shows the structure inside the machine room which concerns on Embodiment 1 of this invention. It is a front view which shows the other structural example of the back wall seen from the vegetable compartment of the refrigerator which concerns on Embodiment 1 of this invention. It is a figure which shows the partial side surface sectional drawing which shows the structure of a part of cooler room | chamber and machine room which concern on Embodiment 2 of this invention.

Embodiment 1 FIG.
The configuration of the refrigerator 1 will be described with reference to FIGS. FIG. 1 is an external perspective view showing a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing a refrigerant circuit and an air circulation path of the refrigerator according to Embodiment 1 of the present invention. FIG. 3 is a side sectional view showing the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is a schematic configuration diagram of a machine room on the back surface of the refrigerator according to Embodiment 1 of the present invention.

As shown in FIGS. 1 and 3, the refrigerator 1 includes a heat insulating box 19 configured in a vertically long rectangular parallelepiped shape, and a plurality of storage chambers are formed in the heat insulating box 19. In the refrigerator 1, storage rooms are arranged in the order of the refrigerator compartment 2, the ice making room 3 on the left side, the temperature switching room 4 on the right side of the ice making room 3, the vegetable room 5, and the freezing room 6. Are each provided with a partition.

The heat insulation box 19 includes an upper surface portion, a bottom surface portion, a right side surface portion, a left side surface portion, a back surface portion, and doors provided on the front side of each storage room. Further, as shown in FIG. 3, a cooler chamber 27 is formed in the heat insulating box 19, and the cooler chamber 27 is located on the back of the ice making chamber 3, the temperature switching chamber 4, and the vegetable chamber 5. ing. The refrigerator 1 further includes a machine room 90 formed on the outside of the heat insulation box 19 with a part of the wall portion 19a of the heat insulation box 19 being recessed inside at the lower back portion. The machine room 90 is located on the back side of the freezer room 6, and a machine room cover (not shown) is provided on the back side of the machine room 90.

As shown in FIG. 2, the refrigerator 1 includes a refrigerant circuit 7 through which refrigerant circulates and an air circulation path 36 through which air circulates, and cools the interior of the refrigerator 1 by exchanging heat between the refrigerant and air. . In FIG. 2, the solid line arrows indicate the flow direction of the refrigerant flowing through the refrigerant circuit 7, and the broken line arrows indicate the flow direction of the cold air flowing through the air circulation path.

FIG. 4 shows the inside of the machine room 90 when viewed from the rear with the machine room cover removed. As shown in FIGS. 2 and 4, the refrigerant circuit 7 includes a compressor 8, an air-cooled condenser 9, a heat radiating pipe 10, a dew prevention pipe 11, a dryer 12, a decompressor 13, and a cooler 14. Etc. are connected by piping. The compressor 8 compresses the refrigerant and circulates it in the refrigerant circuit 7, and is installed in the machine room 90. The machine room 90 is provided with a machine room fan 95 that takes outside air into the machine room 90 and circulates the air in the machine room 90 to cool the compressor 8 and the like. The air-cooled condenser 9 is an air-cooled heat exchanger that is disposed in the machine room 90 and radiates the heat of the refrigerant to the air blown by the machine room fan 95. The heat radiating pipe 10 is a pipe installed inside the urethane of the refrigerator 1 main body, and naturally radiates the heat of the refrigerant to the air outside the refrigerator 1. The dew prevention pipe 11 is stretched around each storage room on the front surface of the refrigerator 1 to prevent condensation on the front surface. As described above, the air-cooled condenser 9, the heat radiating pipe 10, and the dew prevention pipe 11 have a function of condensing the refrigerant in the refrigerant circuit 7. Further, the dryer 12 removes moisture in the refrigerant and prevents freezing due to moisture. The decompression device 13 includes, for example, a capillary tube, and decompresses the refrigerant. The cooler 14 is disposed in the cooler chamber 27, and the blower 15 that circulates the air in the refrigerator 1 is also disposed in the cooler chamber 27. The cooler 14 is a heat exchanger that absorbs the heat of the refrigerant into the air blown by the blower 15. That is, the cooler 14 has a function of evaporating the refrigerant.

The refrigerator 1 is also provided with an air passage for introducing the cold air cooled by the cooler chamber 27 into each storage chamber, and an air volume adjusting device 18a that is provided in the air passage and adjusts the amount of the cold air flowing into each storage chamber. 18b, 18c (hereinafter sometimes collectively referred to as an air volume adjusting device 18). The air volume adjusting device 18 is composed of, for example, a damper having a variable opening. The refrigerator 1 includes a control board 17 and a plurality of temperature sensors as shown in FIG. The

temperature sensors

16a, 16b, 16c, and 16d (hereinafter sometimes collectively referred to as the temperature sensor 16) are composed of, for example, a thermistor and are installed in each storage room, and the air temperature in the installed storage room, or Detect the temperature of stored food. In FIG. 3, the temperature sensor 16a is installed in the refrigerator compartment 2, the temperature sensor 16b is installed in the temperature switching chamber 4, the temperature sensor 16c is installed in the vegetable compartment 5, and the temperature sensor 16d is installed in the freezer compartment 6. The control board 17 is built in the upper back of the refrigerator 1. The control board 17 includes, for example, a microcomputer and electronic components, and performs various controls of the refrigerator 1. For example, the control board 17 controls the opening degree of the air volume adjusting device 18 installed in the air passage, the driving frequency of the compressor 8, the air volume of the blower 15, and the like according to the temperature information input from the temperature sensor 16. To do.

In the refrigerant circuit 7, the refrigerant discharged from the compressor 8 sequentially passes through the air-cooled condenser 9, the heat radiating pipe 10, and the dew prevention pipe 11, and is radiated and condensed while passing. The refrigerant that has flowed out of the dew prevention pipe 11 flows into the dryer 12 to remove moisture, and flows into the decompression device 13. The refrigerant flowing into the decompression device 13 is decompressed and flows into the cooler 14. In the cooler 14, the refrigerant absorbs heat from the air circulating in the refrigerator 1 by the blower 15 and evaporates. At this time, the air around the cooler 14 is cooled. When the refrigerant evaporated in the cooler 14 passes through the suction pipe connecting the cooler 14 and the compressor 8, the temperature rises while exchanging heat with the refrigerant flowing through the decompression device 13, and returns to the compressor 8.

On the other hand, the cool air generated by the air in the refrigerator 1 exchanging heat with the refrigerant flowing in the cooler chamber 27 is blown by the blower 15 through the air passage to each storage chamber, thereby cooling each storage chamber. . The temperature of each storage room is detected by a temperature sensor 16 installed in each storage room, and the control board 17 operates the air volume adjusting device 18 and the like so that the detected temperature becomes a preset temperature. Maintained at an appropriate temperature. The cold air that has cooled each storage chamber is returned to the cooler chamber 27 by the blower 15 through the air passage.

As shown in FIG. 3, the cooler 14 is preferably provided in the cooler chamber 27 so that the lower end 14 a is positioned below the position F on the floor surface of the vegetable chamber 5. When configured in this manner, a larger space is secured above the cooler 14, so that the degree of freedom of the size of the blower 15 that blows cool air into each storage chamber is increased, and the air volume adjusting device 18 is disposed. Space to do this is secured.

Next, the configuration of the heat insulation box 19 of the refrigerator 1 will be described with reference to FIGS. FIG. 5 is a partial cross-sectional view showing the configuration of the heat insulation box according to Embodiment 1 of the present invention. FIG. 6 is a partial cross-sectional view showing a state in which the members of the heat insulation box according to Embodiment 1 of the present invention are fixed. FIG. 7 is a partial cross-sectional view showing a first example of the configuration of the heat insulating box according to Embodiment 1 of the present invention. FIG. 8 is a partial cross-sectional view showing a second example of the configuration of the heat insulating box according to Embodiment 1 of the present invention. FIG. 9 is a partial explanatory view showing a third example of the configuration of the heat insulation box according to Embodiment 1 of the present invention.

As shown in FIG. 5, the heat insulation box 19 is composed of an outer box 21 and an inner box 22 that form an outer shell, and a heat insulating material 23 and the like disposed between the outer box 21 and the inner box 22. The heat intrusion from is suppressed. The inner box 22 is a part of the outer shell of the heat insulating box 19 and constitutes the inner wall of each storage chamber. For the heat insulating material 23, for example, a urethane foam material 23a or the like is used.

Further, as shown in FIG. 6, when a drawer-type storage room door having a frame structure 25a is installed, a rail structure 25b for receiving the frame structure 25a is installed on the inner box 22 side of the heat insulating box body 19. The At the position where the support 25c of the rail structure 25b is installed, the heat insulating box 19 has a shape corresponding to the shape of the support 25c, and the support 25c is fixed by the surrounding inner box 22 and the urethane foam material 23a. The In other parts of the heat insulating box 19, various internal members such as a reinforcing member that corrects the distortion of the refrigerator 1, components of the refrigerant circuit 7, and electric wiring components are fixed by the urethane foam material 23a. The

As shown in FIG. 7, the heat insulating material 23 of the heat insulating box 19 may be composed of a urethane foam material 23a and a vacuum heat insulating material 23b. In this case, the vacuum heat insulating material 23b is disposed in a part of the space formed between the outer box 21 and the inner box 22, and the urethane foam 23a is filled in the remaining space. In FIG. 7, the vacuum heat insulating material 23 b is attached to the wall surface of the outer box 21. Thus, the heat insulation box 19 can further reduce the amount of heat intrusion into the refrigerator 1 by using the vacuum heat insulating material 23 b for a part of the heat insulating material 23.

Further, as shown in FIG. 8, the vacuum heat insulating material 23 b is arranged by a spacer 26 at an intermediate position between the wall surface of the outer box 21 and the wall surface of the inner box 22 according to the position installed inside the heat insulating box body 19. It may be configured. Alternatively, as shown in FIG. 9, the vacuum heat insulating material 23 b may be attached to the wall surface of the inner box 22. In the configuration of FIG. 9, the vacuum heat insulating material 23b is preferably installed so as not to interfere with the internal member. In addition, the position and range in which the vacuum heat insulating material 23b is installed in the heat insulation box 19 are not limited to the above configuration, and may be installed so as to ensure the housing strength of the refrigerator 1. The refrigerator 1 can reduce the distance (heat insulation thickness) between the outer box 21 and the inner box 22 and increase the internal volume by mounting the vacuum heat insulating material 23b.

Next, the air path formed in the refrigerator 1 will be described. The air passage is composed of an air passage connected to the cooler chamber 27 and some of the storage compartment air passages, a blowout air passage from which cool air blows out to each storage compartment, and a return air passage from which the cold air returns from each storage compartment. The

FIG. 10 is an explanatory diagram showing the lower periphery of the refrigerator according to Embodiment 1 of the present invention. (A) is front sectional drawing when a door is removed, (b) is side sectional drawing. As shown in FIG. 10, a return air passage 30a from the refrigerator compartment 2 is formed on the right side of the cooler 14, and a return air passage 30c from the temperature switching chamber 4 and a vegetable compartment are in front of the return air passage 30a. A blowout air passage 29d to 5 is formed. A back wall 31 is formed in front of the cooler 14, the return air passage 30 c, and the blowout air passage 29 d to be a partition from the space in the vegetable compartment 5.

FIG. 11 is a side cross-sectional view showing the configuration around the vegetable compartment according to Embodiment 1 of the present invention. A back wall 31 that separates the vegetable compartment 5 from the cooler compartment 27 is formed on the back of the vegetable compartment 5. The back wall 31 is a heat insulating wall, and a heat insulating wall shell 38 on the vegetable room 5 side and a heat insulating wall shell 42 on the cooler chamber 27 side, a vacuum heat insulating material 39, and a foam heat insulating material disposed around the vacuum heat insulating material 39. 40 etc. The foam heat insulating material 40 on the back wall 31 is provided with an air passage 28 through which cool air is blown into storage rooms such as the freezer compartment 6 and the refrigerator compartment 2. The front and rear arrangement of the air passage 28 is in the order of the cooler 14, the heat insulating wall shell 42, the foam heat insulating material 40 on which the air passage 28 is formed, the vacuum heat insulating material 39, and the heat insulating wall outer wall 38 on the vegetable compartment 5 side from the rear. It has become. The foam heat insulating material 40 having the air path configuration also has a function of holding the air volume adjusting device 18.

The ceiling wall 32 of the vegetable room 5 serves as a partition between the vegetable room 5, the ice making room 3 and the temperature switching room 4, and the bottom wall 35 of the vegetable room 5 serves as a partition between the vegetable room 5 and the freezing room 6. It becomes. The ceiling wall 32 and the bottom wall 35 are heat insulating walls, and suppress heat transfer between storage rooms having different set temperatures. The ceiling wall 32 and the bottom wall 35 are formed of, for example, an injection molding material, and the inside is formed of a urethane foam material 35a and a vacuum heat insulating material 35b. By securing the viscosity and flow path width of the urethane foam material 35a, the vacuum heat insulating material 35b can be arranged in the middle of the partition outer wall surface, and the entire structure can be wrapped with the urethane foam material 35a to further suppress deterioration. As shown in FIG. 11, when the vacuum heat insulating material 35b is disposed on the low temperature storage chamber side, the temperature in the storage chamber set at a low temperature can be easily maintained. In FIG. 11, the vacuum heat insulating material 35 b is disposed on the ice making chamber 3 and temperature switching chamber 4 side in the ceiling wall 32, and is disposed on the freezing chamber 6 side in the bottom wall 35.

FIG. 12 is a front cross-sectional view showing the back wall portion viewed from the vegetable compartment according to Embodiment 1 of the present invention. As shown in FIG. 12, the air outlet 44 through which cool air blows into the vegetable compartment 5 is formed in the upper right portion of the inner wall of the back wall 31 of the vegetable compartment 5. The cold air outlet 44 is located outside the projection surface in the front-rear direction of the vacuum heat insulating material 39 installed on the back wall 31. The return port 45 from which the cold air returns from the vegetable compartment 5 is formed in the lower left portion diagonally with respect to the air outlet 44 in the back wall 31. The return port 45 is located outside the projection surface in the front-rear direction of the vacuum heat insulating material 39. The blower outlet 44 is configured so that the air generated by the cooler 14 is blown by the blower 15 disposed above the cooler 14 and the air volume adjusting device 18 (for example, the air flow adjusting device 18 c) provided above the cooler chamber 27. To supply via. The cold air blown into the vegetable compartment 5 from the blower outlet 44 cools the vegetable compartment 5, then is discharged from the cold return port 45, led to the cooler compartment 27, and cooled again by the cooler 14. .

FIG. 13 is an explanatory diagram showing a refrigerator air outlet air passage and a return air passage of the refrigerator compartment 2 of the refrigerator according to Embodiment 1 of the present invention. (A) is the partial front view of the refrigerator 1 when a door is removed, (b) is side sectional drawing of the refrigerator 1 in the blowing air path 29a of a refrigerator compartment, (c) is the return wind of the refrigerator compartment 2 It is a partial side sectional view of refrigerator 1 in way 30a.

As shown in FIG. 13, the blowout air passage 29 a of the refrigerator compartment 2 is configured by connecting a plurality of air passages through which the cold air passes after being discharged from the blower 15 installed above the cooler 14. The plurality of air paths include, for example, an air path 28 in the back wall 31, an air path toward the refrigerating room 2 in the foam insulation above the cooler room 27, the refrigerating room 2, the ice making room 3, and the temperature switching room. 4 are an air passage in a heat insulating wall that partitions 4 and an air passage formed by a foam heat insulating material installed on the back side of the refrigerator compartment 2. The air volume adjusting device 18a that adjusts the amount of cold air supplied to the refrigerating room 2 is installed in the middle of the blowout air passage 29a of the refrigerating room 2, for example. Moreover, the return air path 30a of the refrigerator compartment 2 is installed on the right side of the cooler 14 so as to obtain necessary heat insulation using a foam heat insulating material. The outlet of the return air passage 30a of the refrigerator compartment 2 is connected from the lower right side of the cooler 14 in the cooler compartment 27 to a drip tray 80 that receives the molten water at the time of defrosting.

When the required heat insulation is not ensured in the return air passage 30a of the refrigerator compartment 2, the return air passage 30a may be provided with an air passage heater for avoiding blockage of the air passage due to frost formation. FIG. 14A is a front view showing an installation example of the air path heater of the refrigerator according to Embodiment 1 of the present invention. FIG. 14B is a front view showing another installation example of the air passage heater of the refrigerator according to Embodiment 1 of the present invention. FIG. 14A and FIG. 14B show the lower periphery of the refrigerator when the door is removed.

In FIG. 14A, the air passage heater 33a is installed in the return air passage 30a of the refrigerator compartment 2, and generates heat when necessary. The air path heater 33a is installed in an arbitrary position in the return air path 30a in the longitudinal direction of the air path. For example, the air path heater 33a may be installed in a range equal to or larger than the size of the cooler 14 projected in the vertical direction. 14B, the air path heater 33b is installed in the vicinity of the drip tray 80. For example, the air path heater 33b may be provided so as to be along the flow direction of the return cold air in a range of about 100 mm above and below around the junction between the return air path 30a and the drip tray 80.

FIG. 15 is an explanatory diagram showing an ice making chamber blowing air passage and an ice making chamber return air passage of the refrigerator according to Embodiment 1 of the present invention. (A) is the partial front view of the refrigerator 1 when a door is removed, (b) is a perspective view in the ice making chamber 3. FIG.

As shown in FIG. 15, the blowout air passage 29b of the ice making chamber 3 is configured by connecting a plurality of air passages through which cool air passes after being discharged from the blower 15 installed above the cooler 14. The plurality of air paths are, for example, an air path in the foam heat insulating material above the cooler chamber 27, an air path molded with a foam heat insulating material installed on the back side of the ice making chamber 3, and the like. Note that an air volume adjusting device (not shown) that adjusts the amount of cold air supplied to the ice making chamber 3 is installed in the middle of the blowout air passage 29b of the ice making chamber 3, for example. In the ice making chamber 3, the cold air outlet 70 is provided at an arbitrary position on the back surface of the ice making chamber 3, and the cold air blown out from the air outlet 70 flows into the ice making mechanism 71. The return air passage 30 b of the ice making chamber 3 is installed in the projected width in the front-rear direction of the ice making chamber 3 on the ice making chamber 3 side from the center of the refrigerator 1 within the entire width of the cooler 14 from the front surface of the cooler 14. The return air passage 30b of the ice making chamber 3 includes a return opening 72 arbitrarily installed in the back wall of the ice making chamber 3, a back side of the outer surface of the ice making chamber surface, and a foam heat insulating material adjacent to the outer surface of the ice making chamber 3 surface. And a part of. The discharge port of the return air passage 30 b of the ice making chamber 3 joins in the vicinity of the cold air return port 74 from the freezing chamber 6. In order to avoid the merging pressure loss, the cold air return port 74 from the freezer compartment 6 is formed in the vicinity of the cold air outlet from the ice making chamber 3 to have a dimension equal to or larger than the left and right width of the return air passage 30b of the ice making chamber 3. It is good to be done. Note that the return air passage 30 b of the ice making chamber 3 may be directly returned into the cooler chamber 27 at a position above the cold air return port 74 from the freezer compartment 6.

FIG. 16 is an explanatory diagram showing a switching chamber blowing air passage and a switching chamber return air passage of the refrigerator according to Embodiment 1 of the present invention. (A) is a partial front view of the refrigerator 1 when a door is removed, (b) is a partial side sectional view of the refrigerator 1.

As shown in FIG. 16, the cool air blowing air passage 29 c to the temperature switching chamber 4 connects a plurality of air passages through which the cooler after being discharged from the blower 15 installed above the cooler 14 passes. Configured. The plurality of air paths are an air path in the foam heat insulating material above the cooler chamber 27, an air path formed by the foam heat insulating material installed on the back side of the temperature switching chamber 4, and the like. Note that the air volume adjusting device 18b (see FIG. 3) that adjusts the amount of cold air supplied to the temperature switching chamber 4 is installed in the middle of the blowout air passage 29c of the temperature switching chamber 4, for example. Further, the return air passage 30c of the switching chamber is adjacent to the cool air return port arbitrarily installed in the back wall of the temperature switching chamber 4, the back side of the outer surface of the temperature switching chamber 4, and the outer surface of the temperature switching chamber 4 surface. And a part of the foam insulation. Further, the outlet of the return air passage 30 c is provided on the right side of the return air passage 30 e from the freezer compartment 6.

FIG. 17 is an explanatory diagram showing a freezer compartment outlet air passage of the refrigerator and a return air passage of the freezer compartment 6 according to Embodiment 1 of the present invention. (A) is a partial front view of the refrigerator 1 when a door is removed, (b) is a partial side sectional view of the refrigerator 1.

As shown in FIG. 17, the blowout air passage 29e of the freezer compartment 6 is configured by connecting a plurality of air passages through which the cold air discharged from the blower 15 installed above the cooler 14 passes. The plurality of air passages are, for example, air passages 28 provided in the back wall 31 and the bottom wall 35 of the vegetable compartment 5. The cold air that has passed through the blowout air passage 29e of the freezer compartment 6 is guided into storage cases stacked in a plurality of stages in the freezer compartment 6 by a guide portion provided on the back ceiling of the freezer compartment 6. Cool the stored items inside. In addition, the return air passage 30 e of the freezer compartment 6 is configured by an air passage provided from the inside of the freezer compartment 6 toward the rear of the bottom wall 35 of the vegetable compartment 5. The return air passage 30e is formed in a range within the left-right width of the cooler 14. The outlet of the return air passage 30e of the freezer compartment 6 is connected to the drip tray 80 from the lower right side of the cooler 14 in the cooler compartment 27, similarly to the return air passage 30a of the refrigerator compartment 2. In addition, said guide part is provided with the two guides arranged in the front-back direction of the refrigerator 1, for example, the guide of the blowing side into the freezer compartment 6 ahead, and the return side from the inside of the freezer compartment 6 back A guide may be arranged.

FIG. 18 is a schematic cross-sectional view showing a first example of the configuration of the storage compartment partition according to Embodiment 1 of the present invention. FIG. 19 is a schematic cross-sectional view showing a second example of the configuration of the storage compartment partition according to Embodiment 1 of the present invention. In FIG. 11 described above, the case where the vacuum heat insulating material 35b in the bottom wall 35 of the vegetable room 5 is arranged on the low temperature storage room side (the freezing room 6 side) has been described. As shown in FIG. 19, it can be arranged at an arbitrary position in the bottom wall 35. As shown in FIG. 19, when the vacuum heat insulating material 35b is disposed on the vegetable wall 5 side of the outer wall surface, the coverage on the inner wall surface of the vegetable room 5 can be increased, and the amount of heat penetration can be suppressed. it can.

Also, the vacuum heat insulating material 39 can be arranged at an arbitrary position in the back wall 31 of the vegetable room 5. FIG. 20 is a side cross-sectional view showing a first example of the wall surface configuration around the vegetable compartment according to Embodiment 1 of the present invention. FIG. 21 is a side cross-sectional view showing a second example of the wall surface configuration around the vegetable compartment according to Embodiment 1 of the present invention. FIG. 22 is a side cross-sectional view showing a third example of the wall configuration around the vegetable compartment according to Embodiment 1 of the present invention.

In FIG. 20, the back wall 31 is from the rear near the cooler 14 to the front, the heat insulating wall shell 42, the foam heat insulating material 40 in which the air passage 28 is formed, the vacuum heat insulating material 39, the foam heat insulating material 40, the vegetable compartment 5 side. It is comprised so that it may become the order of the heat insulation wall outline 38 of this. Further, in FIG. 21, the vacuum heat insulating material 39 is attached to the inner wall of the heat insulating wall outline 42 on the cooler 14 side in order to ensure the effect of the vacuum heat insulating material 39. In the configuration example shown in FIG. 21, the height dimension of the vacuum heat insulating material 39 may be reduced in response to restrictions on the position of the outlet of the cold air discharged from the blower 15 or the size of the outlet. Further, in the configuration in which the foam heat insulating material 40 is not disposed around the vacuum heat insulating material 39, there is a concern about the promotion of deterioration of the vacuum heat insulating material 39. However, as shown in FIG. The vacuum heat insulating material 39 is protected by installing the foam heat insulating material 40 therebetween. Note that the size of the vacuum heat insulating material 39 is set larger than the area where the cooler 14 is projected forward, thereby minimizing the one-dimensional heat transfer amount passing through the back wall 31.

Further, the blower outlet 44 and the return outlet 45 formed on the back surface of the vegetable compartment 5 may be arranged on either the left side or the right side. FIG. 23A is a front cross-sectional view showing a first example of a back wall portion viewed from the vegetable compartment according to Embodiment 1 of the present invention. FIG. 23B is a front cross-sectional view showing a second example of the back wall portion viewed from the vegetable compartment according to Embodiment 1 of the present invention.

When it is arranged on the left side as shown in FIG. 23A or when it is arranged on the right side as shown in FIG. 23B, it is not necessary to provide an air passage on the right side or the left side. Can be set. In such a structure, the coverage with the vacuum heat insulating material 39 of the vegetable compartment 5 increases, and heat insulation is strengthened. That is, the heat transfer from the vegetable compartment 5 to the other storage room, or the cold heat transfer from the other storage room and the cooler room 27 to the vegetable room 5 is suppressed. Moreover, the heat penetration | invasion to the vegetable compartment 5 from the refrigerator 1 exterior is suppressed.

On the other hand, when the coverage of the vacuum heat insulating material is set large, the average temperature of the vegetable compartment 5 tends to decrease. For this reason, the refrigerator 1 is good to provide the structure for hold | maintaining the room temperature of the vegetable compartment 5. FIG.

FIG. 24 is a schematic diagram showing the arrangement of the heat retaining heaters in the vegetable compartment according to Embodiment 1 of the present invention. FIG. 24 shows an example in which a heat retaining heater 46 using electrical resistance is installed in order to maintain the room temperature of the vegetable room 5 when necessary. The warming heater 46 is at an arbitrary position on the floor, back, left side, and right side of the vegetable room 5, particularly at a point where the room temperature of the vegetable room 5 is relatively low, for example, an arbitrary capacity of about 3W or less and about 10W. Installed at. The heat retaining heater 46 is energized at a time-based energization rate (ratio of energization time to reference time) depending on the outside air temperature and the room temperature of the vegetable room 5.

FIG. 25 is a schematic diagram showing the arrangement of the heat radiating pipes in the vegetable compartment according to Embodiment 1 of the present invention. FIG. 26 is a schematic diagram showing a connection relationship between the heat radiation pipe of the vegetable compartment and the refrigerant circuit according to Embodiment 1 of the present invention. FIG. 25 shows a configuration in which a heat radiating pipe 47 is arranged in place of the heat retaining heater 46 inside the urethane foam material 23 a on the left and right side walls of the vegetable compartment 5 and on the heat insulating material side inside the outer wall of the bottom wall 35. . The heat radiating pipe 47 circulates the refrigerant used for the cooler 14 and radiates heat into the vegetable compartment 5. As shown in FIG. 26, the decompression device 13 of the refrigerant circuit 7 includes, for example, a flow path switching three-way valve 48 and two capillaries (capillary tube 51a, capillary tube 51b, and the like). On the refrigerant circuit 7 described above, after being connected to the dryer 12 through the dew prevention pipe 11, the downstream side of the flow path switching three-way valve 48 is switched. Of the two

outlet pipes

49 and 50 on the downstream side of the flow path switching three-way valve 48, the outlet pipe 50 is connected to one end of the capillary tube 51 a through the heat radiating pipe 47. On the other hand, the outlet pipe 49 is connected to one end of the capillary tube 51b. The capillary tube 51b to which the outlet pipe 49 is connected may be configured to change the amount of decompression.

In such a configuration, when the heat radiating pipe 47 dissipates the heat of the refrigerant into the vegetable compartment 5, the load increases on the air side, and the refrigerant condensing capacity increases on the refrigeration cycle side. As a result, the efficiency of the refrigeration cycle is improved, and power consumption can be reduced as compared with the case where the heat retaining heater 46 is used.

A configuration for adjusting the flow rate of the refrigerant flowing through the heat radiating pipe 47 will be described with reference to FIGS. FIG. 27 is a diagram showing a flow rate characteristic on the outlet pipe side that is not connected to the heat radiating pipe to the vegetable compartment in the flow path switching three-way valve according to Embodiment 1 of the present invention. FIG. 28 is a schematic configuration diagram of a flow path switching three-way valve according to Embodiment 1 of the present invention. FIG. 29 is an explanatory diagram showing a flow path formation state with respect to STEP of the rotating gear in the flow path switching three-way valve according to Embodiment 1 of the present invention.

As shown in FIG. 28, the flow path switching three-way valve 48 uses, for example, an electronically controlled expansion valve such as a linear electronic expansion valve, and the flow rate of the refrigerant discharged from the outlet pipe 49 connected to the capillary 51b. Is adjusted in multiple stages. The flow path switching three-way valve 48 is generally composed of a low-voltage four-phase stepping motor 52, a valve body 53, and the like. The valve body 53 includes, as main components, a magnetized rotor 54, a center gear 55, a rotating gear 56, a rotating pad 57, a valve seat 58, an outer case 59, a floor plate 60, and the like. The flow path switching three-way valve 48 rotates the magnetized rotor 54 by unipolarly driving the four-phase stepping motor 52 by 1-2 phase excitation. The magnetized rotor 54 is directly connected to the center gear 55. When the magnetized rotor 54 rotates, the center gear 55 rotates by the same amount in the same direction as the magnetized rotor 54.

As shown in FIG. 29, the center gear 55 and the rotation gear 56 are directly joined. Therefore, the rotation pad 57 fixed to the rotation gear 56 has a center axis provided on the valve seat 58 as a reference. Rotation is performed in response to the rotation drive. The rotary pad 57 is provided with three

orifices

61, 62, and 63 having different inner diameters. When one of the three

orifices

61, 62, 63 overlaps with the outlet orifice 64 of the valve seat 58 due to the rotation operation of the rotary pad 57, a predetermined refrigerant flow rate flows out. 29 (a) to 29 (g) show the flow path formation state for different STEPs of the rotary gear 56. FIG. On the outlet pipe 49 side, as shown in FIG. 27, the flow control is switched in five stages of fully closed, throttle flow rate A, throttle flow rate B, throttle flow rate C, and full open in ascending order of flow rate. 29, the state (b) is fully closed, the state (c) is the throttle flow rate A, the state (d) is the throttle flow rate B, the state (e) is the throttle flow rate C, and the state (f) is Corresponds to fully open.

By providing such a configuration, the refrigerator 1 can reduce the power consumption while ensuring the temperature of the vegetable compartment 5. In addition, when using the heat retaining heater 46 using electric resistance for the heat retaining of the vegetable compartment 5, instead of the flow path switching three-way valve, a two-way valve that leaves only the flow controllable side of the two outlets is provided. May be used.

A drainage path provided between the cooler room 27 and the machine room 90 will be described with reference to FIGS. 30 to 31B. FIG. 30 is a partial side cross-sectional view showing the configuration of a part of the cooler room and the machine room according to Embodiment 1 of the present invention. FIG. 31A is a schematic plan view showing a first example of the configuration of the drip tray according to Embodiment 1 of the present invention. FIG. 31B is a schematic plan view showing a second example of the configuration of the drip tray according to Embodiment 1 of the present invention.

As shown in FIG. 30, below the cooler chamber 27, defrosting means 67 that melts frost adhering to the cooler 14, and water such as melted water generated during the defrosting operation from the cooler chamber 27 to the machine. A drip tray 80 leading to the chamber 90 is provided.

The defrosting means 67 is constituted by a glass tube heater, for example. The glass tube heater is composed of a nichrome wire and a glass tube for protecting the nichrome wire. When the cooler 14 is defrosted, the nichrome wire generates heat due to electric resistance. The defrosting means 67 is preferably installed below the cooler 14 in the cooler chamber 27 and on the projection surface in the vertical direction of the drainage path inlet described later.

The drip tray 80 is constituted by a heat insulating wall 99 interposed between the vegetable compartment 5 and the machine compartment 90, and is provided at a position lower than the floor surface of the vegetable compartment 5. The heat insulating wall 99 refers to, for example, a rear portion of the heat insulating wall that constitutes the bottom wall 35 of the vegetable room 5 (hereinafter referred to as the wall portion 34), and a wall portion 19a that forms the machine chamber 90 in the heat insulating box body 19. . For example, the upper surface 34 a of the wall portion 34 is molded integrally with the floor surface of the vegetable compartment 5, and the lower surface 34 b is molded integrally with the ceiling surface of the freezer compartment 6. A heat insulating material 34c is installed between the upper surface 34a and the lower surface 34b of the wall 34, and the lower surface 34b is formed by offsetting a certain distance from the upper surface 34a.

The drip tray 80 has a water receiving portion 81 that receives moisture dripping from the cooler 14 and a tubular drainage passage 82 through which water received by the water receiving portion 81 passes. The water receiving portion 81 is formed on the upper surface 34 a of the wall portion 34 and has a shape that is inclined downward toward the inlet 83 of the drainage path 82 so as to guide moisture to the drainage path 82. The drainage path 82 penetrates the inside of the heat insulating material of the heat insulating wall 99, and the outlet 84 protrudes into the machine room 90. The drainage path 82 has a smaller inner diameter at the outlet 84 than at the inlet 83. The drainage path 82 is integrally formed from the inlet 83 to the outlet 84 without providing a seam on the path inside the heat insulating wall 99. The drainage path 82 is integrally formed with the water receiving portion 81 at the inlet 83. For example, when the water receiving portion 81 and the drainage path 82 are formed by the outer shell that is the upper surface 34a of the wall portion 34, moisture is guided from the cooler chamber 27 to the machine chamber 90 without passing through the connecting portion. Is done.

As shown in FIGS. 31A and 31B, the inlet 83 is disposed, for example, in a substantially central portion of the drip tray 80 in the left-right direction, and is formed as a groove shape having a width of 50 mm or less rearward from an arbitrary front position in the front-rear direction. The The cross-sectional shape of the inlet 83 is, for example, a circular shape, an elliptical shape or an oval shape, or a combination shape of a semi-ellipse and a rectangle, or a combination shape of a semi-oval and a rectangle, and the water receiving surface of the drip tray 80 on the rear side. Has reached almost the last part of. In addition, the outlet 84 of the drainage channel 82 has an inner diameter of 20 mm or less and a substantially circular cross-sectional shape.

As shown in FIG. 30, FIG. 31A and FIG. 31B, the drainage path 82 has a substantially funnel shape that gradually narrows in the depth direction as it proceeds downward from the inlet 83 of the drainage path 82. That is, the inlet 83 side of the drainage passage 82 (hereinafter referred to as the upstream portion 82a) has a smaller cross-sectional area as it goes downstream, and the position of the front side of the cross section approaches the back side. The outlet 84 side of the drainage passage 82 (hereinafter referred to as the downstream portion 82 b) has a tube shape with a substantially constant inner diameter and is formed to have a length that protrudes into the machine chamber 90. The cross section of the upstream portion 82a converges from the cross sectional shape of the inlet 83 to the circular shape of the downstream portion 82b. As shown in FIG. 30, the upstream portion 82a is formed through the wall portion 34, and the downstream portion 82b is formed through the wall portion 19a. Note that a lid structure may be provided at the outlet of the drainage path 82 so that the high humidity air in the machine room 90 does not flow back into the refrigerator 1 through the drainage path 82.

31A and 31B show the cross-sectional center Oa of the upstream portion 82a and the cross-sectional center Ob of the downstream portion 82b, and the cross-sectional center Oa of the upstream portion 82a moves to the rear of the refrigerator 1 as it goes downstream. And reaches the cross-sectional center Ob of the downstream portion 82b. The drainage path 82 is provided from the inlet 83 to the outlet 84 so that the rearmost part is along the back surface of the refrigerator 1.

As shown in FIG. 30, a urethane foam material 23a and a vacuum heat insulating material 23b are installed in the wall portion 19a. As described above, the drainage path has a cross-sectional area smaller than that of the upstream part 82a in the downstream part 82b formed in the wall part 19a, and the last part of the drainage path is provided along the back surface of the refrigerator 1. Yes. Therefore, the vacuum heat insulating material 23b can be disposed up to the vicinity of the back surface of the refrigerator 1 in the wall portion 19a.

Further, as shown in FIG. 30, a path heater 85 may be further installed in the upstream portion 82 a of the drainage path 82. The path heater 85 is constituted by, for example, a cord heater having a coating made of silicon, and is installed in the heat insulating material 34 c of the wall portion 34. The path heater 85 suppresses clogging of the drain path 82 by melting the ice that has fallen to the inlet 83 of the drain path 82 without being melted until reaching the water by heat generation at the time of defrosting.

Further, a metal tray 89 formed of metal is installed on the surface forming the inlet 83. In FIG. 30, the metal tray 89 is installed in the water receiving portion 81 and the upstream portion 82 a of the drainage path 82, and transmits the radiant heat of the defrosting means 67 onto the drip tray 80 surface and the ice that has fallen on the drip tray 80. Makes it easier to melt.

The metal tray 89 has a dimension equal to or greater than the length of the defrosting means 67 installed above in the left-right direction, and is at least one-half the front-back width of the drip tray 80 in the front-rear direction. It may be configured to have dimensions. Further, an area outside the area covered with the metal tray 89 in the drip tray 80 may be covered with a metal tape or the like.

The metal tray 89 is formed along the water receiving part 81 and the upstream part 82a so as to substantially match the shape of the inlet 83 of the drainage path 82, and generates heat generated from the path heater 85 installed inside the heat insulating material 34c. Promotes conduction.

The melted water partially melted by the defrosting means 67 and dripped from the cooler 14 to the water receiving portion 81 of the drip tray 80 is guided to the inlet 83 of the drainage path 82 by the inclination of the water receiving portion 81. The molten water guided to the inlet 83 flows into the drainage path 82, further melts by the path heater 85 while passing through the upstream section 82a, and flows into the downstream section 82b having a small inner diameter. Since no connection portion is provided in the drainage path 82, the molten water that passes through the drainage path 82 is discharged from the outlet 84 protruding into the machine room 90 into the machine room 90 without penetrating into the heat insulating wall 99.

FIG. 32 is a rear view showing the internal configuration of the machine room according to Embodiment 1 of the present invention. The machine chamber 90 is further provided with a water tray (drain pan 91) that receives moisture discharged from the outlet 84 of the drainage passage 82 into the machine chamber 90. In the drain pan 91, a heating pipe 92 is installed. Yes. The heating pipe 92 is constituted by, for example, a refrigerant pipe through which a high-temperature refrigerant flows.

The molten water that has passed through the drainage path 82 is discharged from the outlet 84 to the drain pan 91 of the machine room 90 and accumulated in the drain pan 91. Evaporation of the molten water accumulated in the drain pan 91 is promoted by the heating pipe 92 and the cooling air that cools the air-cooled condenser 9 and the compressor 8 installed in the machine room 90. With such a configuration, the evaporation of the molten water generated last time is completed before the next defrosting operation is started.

In addition, the air path of the refrigerator 1, a blower outlet, and a return port are not limited to the structure mentioned above. FIG. 33 is a front view showing another configuration example of the back wall viewed from the vegetable compartment of the refrigerator according to Embodiment 1 of the present invention. As shown in FIG. 33, the configuration may be such that the return cold air from the refrigerator compartment 2 flows into the vegetable compartment 5. In this case, for example, the outlet from which the cold air returning from the refrigerator compartment 2 blows out to the vegetable compartment 5, that is, the refrigerator return outlet 75 is formed on the upper right side of the inner wall of the back wall 31 of the vegetable compartment 5. The return port 45 is formed at a substantially central portion at the lower back of the vegetable compartment 5. And the return air path of the refrigerator compartment 2 and the vegetable room return air path merge in the lower back side of the vegetable room 5, and from between the return air paths 30e of the freezer compartment 6 divided into right and left, the cooler room 27 is configured to return. The return air path 76 of the refrigerator compartment 2 disposed in the back wall 31 of the vegetable compartment 5 has no heat insulating function between the vegetable compartment 5 and is separated by an inner wall surface formed by injection molding, for example. . Therefore, in order to adjust the temperature in the vegetable compartment 5, a plurality of holes 77 may be provided on the inner wall surface that separates the return air passage 76 of the refrigerator compartment 2 from the vegetable compartment 5. Further, a slider 78 that freely opens and closes the plurality of holes 77 may be provided. When the slider 78 is slid in the vertical direction indicated by the arrow, the number of holes 77 to be closed is adjusted, so that the user can arbitrarily adjust the temperature in the vegetable compartment 5 by moving the slider 78. In such a configuration, since the temperature can be adjusted in the vegetable compartment 5, the above-described air volume adjusting device 18c for adjusting the amount of cold air supplied to the vegetable compartment 5 may not be installed in the air passage.

As described above, in the first embodiment, the refrigerator 1 includes the inner box 22 and the outer box 21, and the heat insulating box 19 having the heat insulating material 23 installed in the space between the inner box 22 and the outer box 21. A lower part of the back surface of the heat insulation box 19 is formed inwardly, a machine room 90 in which the compressor 8 is disposed, and a cooler that is formed in the heat insulation box 19 above the machine room 90 and generates cool air. 14 is disposed below the cooler 14 in the cooler chamber 27, and a water receiving portion 81 for receiving water from the cooler 14, and an inlet 83 is installed in the water receiving portion 81, A drainage path 82 that penetrates through a heat insulating wall 99 interposed between the cooler chamber 27 and the machine chamber 90 so that the cooler chamber 27 and the machine chamber 90 communicate with each other; And the inlet 83 side of the drainage channel 82 follows the downstream side. , The cross-sectional area is reduced, and has the shape center position of the cross section (the cross-sectional center Oa) approaches the rear side, the drainage path 82 is integrally formed from the inlet 83 to the outlet 84.

Accordingly, the drainage path 82 has a shape in which the inner diameter decreases from the inlet 83 to the outlet 84 while the cross-sectional center Oa approaches the back side of the refrigerator 1. The heat insulating wall 99 can be provided with a vacuum heat insulating material (for example, a vacuum heat insulating material 23b). Therefore, the refrigerator 1 can ensure heat insulation performance. In addition, unlike the conventional configuration in which the drainage path 82 has a connection portion in the heat insulating material, the drainage path 82 is integrally molded from the inlet 83 to the outlet 84, so that moisture permeates from the drainage path 82 into the heat insulating wall 99. It is suppressed. Therefore, the refrigerator 1 can reduce generation | occurrence | production of the water leak etc. in a warehouse by obstruction | occlusion of the drainage path 82. FIG.

Further, the drainage path 82 has a wall surface extending in the vertical direction on the back side or a part of the back side in plan view. That is, the drainage path 82 is provided so that the portion closest to the back surface of the refrigerator 1 in plan view is, for example, along the back surface of the refrigerator 1 in the vertical direction of the refrigerator 1. Thereby, in the heat insulation wall 99 interposed between the cooler room 27 and the machine room 90, the range in which the vacuum heat insulating material (for example, the vacuum heat insulating material 23b) is disposed can be extended to the back side of the refrigerator 1. . Therefore, the refrigerator 1 can increase the covering area of the vacuum heat insulating material 23b particularly at a position where heat insulation is required. As a result, the dew on the top surface of the machine room 90 is reduced and the energy saving performance is improved.

Further, the drainage path 82 is configured integrally with the water receiving portion 81. Thereby, since the connection part is not provided on the path | route through which the molten water dripping from the cooler 14 passes, the certainty that molten water is drained from the cooler 14 to the machine room 90 can further be improved.

Moreover, the cross-sectional shape of the inlet 83 of the drainage channel 82 is elliptical or oval. As a result, the drainage path is easily formed integrally with the drip tray 80. By the way, conventionally, the drainage path entrance provided on the water receiving surface of the drip tray has a substantially circular shape. Maintaining such a shape and securing a length that allows the drainage channel to protrude into the machine room is a long and narrow drainage channel. The inner diameter of the route outlet becomes extremely small. Therefore, in the conventional drainage route, the drainage performance decreases and the probability of occurrence of blockage due to foreign matter increases. On the other hand, in the drainage channel 82, since the inlet 83 is configured in the above-described shape, the water receiving portion 81 and the drainage channel 82 are easily molded integrally. Therefore, the refrigerator 1 can obtain a drainage path 82 with stable quality.

The refrigerator 1 further includes defrosting means 67 for melting the frost in the cooler 14 with a heater or a high-temperature refrigerant. From this, the defrosting means 67 can melt | dissolve the frost adhering to the cooler 14, remove it from the cooler 14, and can maintain the performance of the cooler 14. FIG.

The refrigerator 1 further includes a drain pan 91 installed below the outlet 84 in the machine room 90. The drain pan 91 has a heating pipe 92 disposed therein. As a result, the water discharged into the machine room 90 can be evaporated in the drain pan 91, and the devices installed in the machine room 90 can be protected.

The refrigerator 1 further includes a first storage room (for example, the vegetable room 5) formed in the heat insulating box 19, and the water receiving portion 81 and the drainage path 82 are the floor surface of the first storage room (the vegetable room 5). Is formed to extend to the cooler chamber 27 and is disposed at a position lower than the floor surface. Thereby, the refrigerator 1 can obtain the drip tray 80 in which the connection part is not provided on the path | route through which molten water passes, reducing the part for comprising the drip tray 80 separately.

The refrigerator 1 is a second storage room (below the first storage room (for example, the vegetable room 5) and is formed in front of the machine room 90, and is set at a lower temperature than the first storage room (the vegetable room 5)). For example, a freezing room 6) is further provided, and the heat insulation wall 99 is a bottom wall 35 of the first storage room (vegetable room) and a wall portion 19a that forms a machine room of the heat insulation box 19. Thereby, the refrigerator 1 can ensure heat insulation also between the 2nd storage chamber (freezer compartment 6) installed in low temperature, and the machine room 90 formed in the outer side of the heat insulation box 19. FIG. , Energy saving can be improved. In particular, since the downstream portion 82b of the drainage path has an inner diameter smaller than that of the upstream portion 82a and is located on the back side, the refrigerator 1 expands the vacuum heat insulating material 23b in the wall portion 19a. Insulation between the second storage chamber (freezer chamber 6) and the cooler chamber 27 can be enhanced.

Embodiment 2.
In Embodiment 1, the drainage path was provided from the inlet to the outlet so that the rearmost part was along the back of the refrigerator. In the second embodiment, a configuration in which the drainage path is inclined on the outlet side will be described. Hereinafter, only differences from the first embodiment will be described, and the other configurations have the same configuration.

FIG. 34 is a partial side sectional view showing the configuration of a part of the cooler room and the machine room according to Embodiment 2 of the present invention. The inlet 183 of the drainage channel 182 is, for example, a circular shape, an elliptical shape or an oval shape, or a combination shape of a semi-ellipse and a rectangle, or a combination shape of a semi-oval and a rectangle, and the rear side is almost the last of the water receiving surface. Has reached the department. Further, the outlet 184 has, for example, a substantially circular cross section. As shown in FIG. 34, on the inlet 183 side (hereinafter referred to as the upstream portion 182a) of the drainage path 182, the cross-sectional area becomes smaller and the position on the front side of the cross section approaches the back side as it goes downstream. Further, the outlet 184 side of the drainage passage 182 (hereinafter referred to as the downstream portion 182b) has a tube shape with a substantially constant inner diameter, and is formed in such a length as to protrude into the machine chamber 90. The drainage path 182 is integrally formed from the inlet 183 to the outlet 184, and the cross section of the upstream portion 182a is formed to converge from the cross sectional shape of the inlet 183 to the circular shape of the downstream portion 182b.

In Embodiment 2, the downstream portion 182b of the drainage path 182 is formed to be inclined from the direction along the back surface of the refrigerator 1 (for example, the vertically downward direction) to the back surface side. That is, the downstream portion 182 b is located closer to the rear side of the refrigerator 1 as the position is closer to the outlet 184. The angle at which the downstream portion 182b is formed is set to an angle that does not impair the moldability of the drainage path 182 and the drainage of the molten water, and does not retain foreign matter. For example, the inclination angle of the outlet 184 may be configured to have a downward elevation angle (angle θ) of 7 ° or more, which is an angle at which a water droplet falls by its own weight, with respect to the depth horizontal direction of the refrigerator 1. Moreover, what is necessary is just to set the upper limit of an elevation angle (angle (theta)) below 90 degrees so that the flow of the molten water from the upstream part 182a of the drainage path 182 may not be prevented, for example.

As described above, in the second embodiment as well, in the same way as in the first embodiment, the drainage path 182 is such that the center position approaches the back side of the refrigerator 1 while reducing the inner diameter from the inlet 183 toward the outlet 184. Further, it is integrally formed from the inlet 183 to the outlet 184. Therefore, as in the case of the first embodiment, the refrigerator 1 can ensure the heat insulating performance of the heat insulating wall 99 and can prevent the drainage path 182 from being blocked, and can suppress the occurrence of water leakage in the cabinet. .

In addition, the inclination angle of the outlet 184 of the drainage channel 182 has an elevation angle (angle θ) downward of 7 ° or more with respect to the depth horizontal direction. Accordingly, since the outlet 184 of the drainage path 182 is formed toward the back side of the refrigerator 1, a wide area in which the vacuum heat insulating material can be disposed in the heat insulating wall 99 is secured, and the refrigerator 1 is made of the vacuum heat insulating material. The insulation area can be enhanced by increasing the covering area.

The embodiment of the present invention is not limited to the above embodiment, and various changes can be made. For example, in Embodiment 1, a heater that generates heat when energized is used as the defrosting means 67, but a configuration in which frost is melted by a high-temperature refrigerant instead of the heater may be used.

1 refrigerator, 2 refrigerator compartment, 3 ice making room, 4 temperature switching room, 5 vegetable room, 6 freezer room, 7 refrigerant circuit, 8 compressor, 9 air-cooled condenser, 10 heat radiation pipe, 11 dew prevention pipe, 12 dryer, 13 decompression device, 14 cooler, 14a lower end, 15 blower, 16 (16a, 16b, 16c, 16d) temperature sensor, 17 control board, 18 (18a, 18b, 18c) air volume adjustment device, 19 heat insulation box, 19a wall Part, 21 outer box, 22 inner box, 23 heat insulating material, 23a urethane foam material, 23b vacuum heat insulating material, 25a frame structure, 25b rail structure, 25c support, 26 spacer, 27 cooler room, 28 air passage, 29a, 29b 29c, 29d, 29e Air outlet, 30a, 30b, 30c, 30e Return air passage, 31 Rear 32, ceiling wall, 33a, 33b, air passage heater, 34 wall, 34a upper surface, 34b lower surface, 34c heat insulating material, 35 bottom wall, 35a urethane foam, 35b vacuum heat insulating material, 36 air circulation path, 38 heat insulating wall outline, 39 Vacuum insulation material, 40 Foam insulation material, 42 Heat insulation wall outline, 44 Outlet, 45 Return port, 46 Heat retention heater, 47 Heat dissipation pipe, 48 Flow path switching three-way valve, 49, 50 Outlet pipe, 51a, 51b Capillary tube, 53 Valve body, 54 Magnetized rotor, 55 Center gear, 56 Rotating gear, 57 Rotating pad, 58 Valve seat, 59 Outer case, 60 Floor, 61 Orifice, 62 Orifice, 63 Orifice, 64 Outlet orifice, 67 Defrosting means, 70 Blowing Exit, 71 ice making mechanism, 72 return port, 74 cold air return port, 75 Refrigeration return port, 76 return air channel, 77 holes, 78 slider, 80 drip tray, 81 water receiving part, 82,182 drainage path, 82a, 182a upstream part, 82b, 182b downstream part, 83,183 inlet, 84,184 Exit, 85 path heater, 89 metal tray, 90 machine room, 91 drain pan, 92 heating pipe, 95 machine room fan, 99 heat insulation wall, Oa, Ob cross-sectional center, θ angle.

Claims

An inner box and an outer box, and a heat insulating box having a heat insulating material installed in a space between the inner box and the outer box;
A machine room in which a lower back portion of the heat insulating box is formed inwardly and a compressor is disposed,
A cooler chamber that is formed in the heat insulation box above the machine chamber and in which a cooler that generates cold air is disposed;
A water receiving portion that is provided below the cooler in the cooler chamber and receives water from the cooler;
An inlet is installed in the water receiving portion, and penetrates a heat insulating wall interposed between the cooler chamber and the machine chamber so as to communicate the cooler chamber and the machine chamber, and the outlet to the machine chamber And a drainage channel that protrudes,
The inlet side of the drainage path has a shape in which the cross-sectional area becomes smaller as it goes downstream, and the center position of the cross section approaches the back side,
The drainage path is configured integrally from the entrance to the exit.
The refrigerator according to claim 1, wherein the drainage path has a wall surface extending in a vertical direction on a back side or a part of the back side in a plan view.
The refrigerator according to claim 1, wherein an inclination angle of the outlet of the drainage path is such that an elevation angle downward with respect to the horizontal direction of the depth is 7 ° or more.
The refrigerator according to any one of claims 1 to 3, wherein the drainage path is configured integrally with the water receiving portion.
The refrigerator according to any one of claims 1 to 4, wherein a cross-sectional shape of the inlet of the drainage path is an elliptical shape or an oval shape.
The refrigerator according to any one of claims 1 to 5, further comprising defrosting means for melting the frost of the cooler with a heater or a high-temperature refrigerant.
Further comprising a water tray installed below the outlet in the machine room;
The refrigerator according to any one of claims 1 to 6, wherein the water tray is provided with a heating pipe.
A first storage chamber formed in the heat insulation box;
The water receiving portion and the drainage path are formed by extending the floor surface of the first storage chamber to the cooler chamber, and are disposed at a position lower than the floor surface. The refrigerator according to one item.
A second storage chamber formed below the first storage chamber and in front of the machine chamber and set at a lower temperature than the first storage chamber;
The refrigerator according to claim 8, wherein the heat insulating wall is a wall portion forming a bottom wall of the first storage chamber and the machine room of the heat insulating box.