JPWO2021009895A1 - refrigerator - Google Patents

Abstract

The refrigerator is provided between a box-shaped heat insulating box body in which a refrigerating chamber for storing objects to be cooled and an ice making chamber for making ice at a lower temperature than the refrigerating chamber are formed, and a refrigerating chamber between the refrigerating chamber and the ice making chamber. It is provided with a heat insulating wall that blocks heat transfer between the heat insulating wall and the ice making chamber, and the heat insulating wall is provided with a heating device that raises the temperature of the heat insulating wall.

Description

The present invention relates to a refrigerator provided with an ice making chamber.

Conventionally, in a refrigerator provided with a refrigerating room and a freezing room, a refrigerator provided with an ice making room for providing ice to a user is known. Such a refrigerator provides ice that has been manufactured and temporarily stored by an ice-making unit housed inside an ice-making chamber. Patent Document 1 discloses a refrigerator in which an ice making chamber surrounded by a heat insulating wall is formed inside the door of the refrigerating chamber and a flow path for supplying cold air to the ice making chamber is configured. The refrigerator of Patent Document 1 attempts to secure a space in the freezer chamber while maintaining the same ice-making action as when the ice-making unit is provided in the freezer compartment.

Japanese Patent No. 4690059

However, in the refrigerator disclosed in Patent Document 1, when the temperature inside the ice making chamber is significantly lower than the temperature inside the refrigerating chamber, the heat insulating wall may be lowered to a temperature below the dew point of the refrigerating chamber. Therefore, dew condensation may occur on the surface of the heat insulating wall that comes into contact with the refrigerating chamber.

The present invention has been made to solve the above-mentioned problems, and provides a refrigerator that suppresses the formation of dew condensation on the surface of the heat insulating wall that comes into contact with the refrigerating chamber.

The refrigerator according to the present invention is provided between a box-shaped heat insulating box body in which a refrigerating chamber for storing a object to be cooled and an ice making chamber for making ice at a lower temperature than the refrigerating chamber are formed, and between the refrigerating chamber and the ice making chamber. It is provided with a heat insulating wall that blocks heat transfer between the refrigerating room and the ice making room, and the heat insulating wall is provided with a heating device that raises the temperature of the heat insulating wall.

The heat insulating wall of the refrigerator according to the present invention has a heating device. Therefore, the temperature of the heat insulating wall rises and does not fall below the dew point. Therefore, it is possible to prevent dew condensation from forming on the surface of the heat insulating wall that comes into contact with the refrigerating chamber.

It is a front view which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is a side view which shows the ice making unit 3 which concerns on Embodiment 1. FIG. It is a side view which shows the ice making unit 3 which concerns on Embodiment 1. FIG. It is a front view which shows the insulation wall 4 which concerns on Embodiment 1. FIG. It is a front view which shows the insulation wall 4 which concerns on Embodiment 1. FIG. It is a side view which shows the ice making unit 3 and the heat insulating wall 4 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the refrigerator 100 which concerns on Embodiment 1. FIG. It is a side view which shows the rib member 163 which concerns on Embodiment 2. FIG. It is a front view which shows the insulation wall 104 which concerns on Embodiment 2. FIG. It is a front view which shows the insulation wall 104 which concerns on Embodiment 2. FIG. It is a side view which shows the ice making unit 3 and the heat insulating wall 104 which concerns on Embodiment 2. FIG. It is a front view which shows the insulation wall 104 which concerns on the modification of Embodiment 2. It is a side view which shows the ice making unit 3 and the heat insulating wall 104 which concerns on the modification of Embodiment 2. It is a side view which shows the insulation wall 204 which concerns on Embodiment 3. FIG. It is a front view which shows the insulation wall 304 which concerns on Embodiment 4. FIG.

Embodiment 1.
Hereinafter, the refrigerator 100 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a front view showing the refrigerator 100 according to the first embodiment. FIG. 2 is a cross-sectional view showing the refrigerator 100 according to the first embodiment. FIG. 3 is a cross-sectional view showing the refrigerator 100 according to the first embodiment. FIG. 4 is a cross-sectional view showing the refrigerator 100 according to the first embodiment. As shown in FIGS. 1 to 4, the refrigerator 100 includes a heat insulating box 1, a cooling device 2, an ice making unit 3, a heat insulating wall 4, a transport duct 5, a display 6, and a control device 7.

(Insulation box 1)
The heat insulating box 1 has a substantially rectangular parallelepiped box shape, and is composed of a steel outer box, a resin inner box, and a heat insulating material filled between the outer box and the inner box. The heat insulating material is, for example, urethane foam. The inside of the heat insulating box 1 is partitioned by a partition wall 11 made of a heat insulating material and extending in the horizontal direction, with the upper portion as the upper chamber 12 and the middle to the lower portion as the middle and lower chamber 13. The heat insulating box 1 has an upper door 14 and a middle and lower door 15. The upper door 14 is attached to the heat insulating box 1 so as to cover the upper chamber 12 in front of the heat insulating box 1. The upper door 14 is composed of two doors and is attached in a double door manner. Further, the middle and lower doors 15 are attached to the heat insulating box 1 so as to cover the middle and lower chambers 13 in front of the heat insulating box 1. The middle and lower doors 15 are composed of two doors and are attached in a double door manner. A dispenser portion 8 which is a recess for storing the transport duct 5 is formed on the front surface of the middle and lower doors 15. The upper door 14 and the middle and lower doors 15 may each consist of one door.

A freezing chamber 21 is formed in the upper chamber 12. A refrigerating chamber 22 is formed in the middle and lower chamber 13, and an ice making chamber 23 is formed on one side of the upper part of the middle and lower chamber 13. As described above, the refrigerator 100 is in the form of a top freezer in which a freezing chamber is formed in the upper part. The refrigerator 100 is not limited to the top freezer type. The ice making chamber 23 is surrounded by a heat insulating wall 4 that blocks heat transfer from the refrigerating chamber 22. That is, the heat insulating wall 4 is provided between the refrigerating chamber 22 and the ice making chamber 23.

Further, a supply air passage 16 and a return air passage 17 are formed in the heat insulating box 1. The supply air passage 16 is formed over substantially the entire height behind the heat insulating box 1, and is an air passage through which cold air supplied from the cooling device 2 to each of the freezing chamber 21, the refrigerating chamber 22, and the ice making chamber 23 passes. The freezing chamber 21 and the supply air passage 16 are separated by a freezing chamber rear wall 18. A freezing chamber air passage hole 38, which is an opening, is formed in the freezing chamber rear wall 18, and the freezing chamber 21 and the supply air passage 16 communicate with each other through the freezing chamber air passage hole 38. Further, the refrigerating chamber 22 and the supply air passage 16 are separated by a rear wall 19 of the refrigerating chamber. A plurality of refrigerating chamber air passage holes 39, which are openings, are formed in the rear wall 19 of the refrigerating chamber, and the refrigerating chamber 22 and the supply air passage 16 communicate with each other through the refrigerating chamber air passage holes 39. The ice making chamber 23 communicates with the supply air passage 16 through the ice making chamber air passage hole 61 which is an opening formed in the heat insulating wall 4. The return air passage 17 is formed inside the partition wall 11 and is an air passage through which cold air flows from the refrigerating chamber 22 to the cooling device 2. In the return air passage 17, the return air passage inlet 36, which is an opening through which cold air flows, is formed in front of the partition wall 11, and the return air passage outlet 37, which is an opening through which cold air flows out, is formed behind the partition wall 11. ..

(Cooling device 2)
The cooling device 2 cools the inside of the heat insulating box 1. The cooling device 2 includes a compressor 41, a condenser (not shown), an expansion unit (not shown), a cooler 42, a blower fan 43, and a damper 44. The compressor 41 sucks in a low-temperature and low-pressure refrigerant, compresses the sucked refrigerant into a high-temperature and high-pressure state refrigerant, and discharges the sucked refrigerant. The condenser exchanges heat between high-temperature and high-pressure refrigerant and air. The expansion portion is a pressure reducing valve or an expansion valve that decompresses and expands the refrigerant. The cooler 42 is provided upstream of the supply air passage 16 and exchanges heat between the low-temperature and low-pressure refrigerant and the air as an evaporator, and cools the air. The blower fan 43 is provided above the cooler 42 in the supply air passage 16, and blows out the cold air generated by the cooler 42 to the freezing chamber 21. The damper 44 is provided in the heat insulating box 1 so as to be located upstream of each of the ice making chamber air passage hole 61 and the refrigerating chamber air passage hole 39 in the supply air passage 16. The damper 44 controls the amount of cold air sent to the ice making chamber 23 and the refrigerating chamber 22 by adjusting the opening degree.

Here, the operation of the cooling device 2 will be described. During the operation of the refrigerator 100, the refrigerant sucked into the compressor 41 is compressed by the compressor 41 and discharged in a high temperature and high pressure gas state. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 41 flows into the condenser. The refrigerant that has flowed into the condenser exchanges heat with air, condenses, and liquefies. The liquid-state refrigerant flows into the expansion portion, is depressurized and expanded, and becomes a low-temperature and low-pressure gas-liquid two-phase state refrigerant. The gas-liquid two-phase refrigerant flows into the cooler 42, which acts as an evaporator. The refrigerant flowing into the cooler 42 exchanges heat with air, evaporates, and gasifies. At this time, the inside of the heat insulating box 1 is cooled by the cooled air. After that, the evaporated low-temperature and low-pressure gas-like refrigerant is sucked into the compressor 41.

(Freezing room 21)
The freezing chamber 21 is a space kept in a freezing temperature range of −18 ° C. or lower, and freezes and stores objects to be cooled such as food.

(Refrigerator room 22)
The refrigerating room 22 is a space that is kept in a refrigerating temperature range centered on 3 to 6 ° C. and refrigerates and stores objects to be cooled such as food. In the refrigerator compartment 22, when the temperature is 3 to 6 ° C. and the relative humidity is 50% to 60%, the dew point is -4 to -1 ° C. In the refrigerating room 22, a plurality of shelves 31 are installed in the horizontal direction. Foods and the like are placed on the shelves 31 and refrigerated. Further, the refrigerating room 22 is formed with a chilled room 33 and a vegetable room 32.

(Chilled room 33)
The chilled chamber 33 is, for example, a space formed on the uppermost shelf 31 and maintained in a temperature zone in which the temperature is particularly low inside the refrigerating chamber 22 and food or the like does not freeze. The chilled chamber 33 is surrounded by a box-shaped storage container 34 having an open upper surface. The storage container 34 is made of, for example, polystyrene. Further, the chilled interior door 35 is provided on the partition wall 11 so as to hang down, and covers the upper part of the front surface of the chilled chamber 33. As a result, the chilled chamber 33 has improved heat insulating properties. Here, a rail (not shown) is provided on the lower portion of the storage container 34, and a rail (not shown) is provided on the shelf 31. The chilled interior door 35 is rotated upward and opened by the user pulling the storage container 34 forward along the rail using the handle. The chilled interior door 35 may be provided on the inner side of the heat insulating box 1 instead of the partition wall 11. Further, the rail may not be formed. Further, the chilled chamber 33 is switched between a temperature zone of about -3 ° C. and a temperature zone of about 1 ° C. by the control device 7. This makes it possible to select a temperature range suitable for the food to be stored, which improves convenience.

(Vegetable room 32)
The vegetable compartment 32 is, for example, a space formed under the lowermost shelf 31 and maintained in a temperature range of 3 to 9 ° C. inside the refrigerating chamber 22. Vegetables are mainly stored in the vegetable compartment 32, and the humidity may be adjusted in addition to the temperature.

(Ice making room 23)
The ice making chamber 23 is a space for producing and storing ice, which is kept at -12 to -7 ° C. The ice making chamber 23 is surrounded by a heat insulating wall 4 and is provided with an ice making unit 3.

(Ice making unit 3)
FIG. 5 is a side view showing the ice making unit 3 according to the first embodiment. FIG. 6 is a side view showing the ice making unit 3 according to the first embodiment. As shown in FIGS. 5 and 6, the ice making unit 3 has an ice making section 51, an ice storage section 52, and an ice breaking section 53. The ice making section 51 and the ice storage section 52 are provided inside the ice making chamber 23, and the ice breaking section 53 is located so as to cover the front surface of the ice making chamber 23. The ice making section 51 manufactures ice by using the cold air generated by the cooling device 2. The ice storage unit 52 temporarily stores the ice produced by the ice making unit 51.

The ice crushing unit 53 is integrally formed with the ice storage unit 52 and crushes the ice stored in the ice storage unit 52. The ice-breaking unit 53 has an ice recovery unit 54 that draws ice from the ice storage unit 52 into the ice-breaking unit 53, and an ice-breaking unit main body 55 that breaks the ice drawn by the ice recovery unit 54. The ice recovery unit 54 has a shape in which a screw-shaped member 57 is provided on a rod-shaped member 56, and rotates around the rod-shaped member as an axis. When the rod-shaped member 56 rotates, the ice stored in the ice storage section 52 caught on the screw-shaped member 57 is drawn into the ice-breaking section main body 55. A metal blade (not shown) is provided inside the icebreaker main body 55. The ice drawn by the ice recovery unit 54 is crushed by a blade rotated by a motor (not shown), and when the ice is smaller than the diameter of the opening provided at the bottom of the ice crushing unit 53, it is discharged from the ice crushing unit main body 55. To. Since the ice making chamber 23 is kept at −7 to −12 ° C., the surface of the ice does not become too hard even if it is stored for a long time, and the ice is easily crushed. Further, the ice crushing unit 53 seals the cold air inside the ice making chamber 23 and functions as an inner door of the ice making chamber 23. A handle (not shown) is provided on the front surface of the ice crushing unit 53, and the user can pull out the ice crushing unit 53 and the ice storage unit 52 toward the front using the handle.

(Insulation wall 4)
FIG. 7 is a front view showing the heat insulating wall 4 according to the first embodiment. FIG. 8 is a front view showing the heat insulating wall 4 according to the first embodiment. FIG. 9 is a side view showing the ice making unit 3 and the heat insulating wall 4 according to the first embodiment. As shown in FIGS. 7 to 9, the heat insulating wall 4 is provided between the refrigerating chamber 22 and the ice making chamber 23 so as to surround the ice making section 51 and the ice storing section 52, and the refrigerating chamber 22 and the ice making chamber 23 are provided with each other. It blocks the heat transfer between them. The heat insulating wall 4 has a heat insulating portion 62 made of a heat insulating material that suppresses heat transfer. One side wall in the width direction of the heat insulating wall 4 is in contact with the inner wall of the heat insulating box 1, and is thinner than the other side wall in the width direction. Further, the heat insulating wall 4 is provided with a heating device. The heating device is, for example, a heater, and is a heat insulating portion heating device 71 provided inside the heat insulating portion 62. When the compressor 41 is in operation, the heat insulating portion heating device 71 is energized and generates heat. As a result, the temperature of the heat insulating portion 62 rises. Further, in general, the temperature of the refrigerating chamber 22 does not decrease when the compressor 41 is not operating. Therefore, the moisture inside the refrigerating chamber 22 is not saturated, and dew condensation is unlikely to occur. Therefore, the heat insulating portion heating device 71 may be energized only when the compressor 41 is in operation.

FIG. 10 is a cross-sectional view showing the refrigerator 100 according to the first embodiment. FIG. 11 is a cross-sectional view showing the refrigerator 100 according to the first embodiment. Here, the flow of cold air generated by the cooling device 2 will be described with reference to FIGS. 10 and 11. First, a part of the cold air generated by the cooler 42 is sent in the direction of the upper chamber 12 by the blower fan 43, and the remaining part flows in the direction of the middle and lower chamber 13. The cold air flowing in the direction of the middle and lower chamber 13 is sent to the freezing chamber 21, the ice making chamber 23, and the refrigerating chamber 22 while the flow rate is controlled by the damper 44. Next, the cold air supplied to the refrigerating chamber 22 flows from the rear to the front on each shelf 31. At this time, the object to be cooled such as food placed on the shelf 31 is cooled. Then, the cold air flowing through the shelf 31 gradually rises from the bottom to the top on the inner front surface of the heat insulating box 1, flows into the return air passage 17 from the return air passage inlet 36 formed in the partition wall 11, and returns. It is sent again from the air passage outlet 37 toward the cooler 42.

(Dispenser 8, transport duct 5, display 6)
The dispenser portion 8 is a recess formed in the front surface of the middle and lower doors 15, and the transport duct 5 is stored in the upper portion. Further, a container (not shown) for putting ice is placed on the lower portion of the dispenser portion 8. The transport duct 5 is a pipe that communicates with the ice crushing portion 53 and discharges ice. The transport duct 5 may be configured to discharge not only ice but also cold water. The display 6 is provided above the dispenser portion 8 on the front surface of the middle and lower doors 15. The user operates the display 6 to select whether to discharge the finely crushed ice from the transport duct 5 or to discharge the ice stored in the ice storage unit 52 without crushing the ice.

Here, a method of using the produced ice will be described. When the operation button provided on the display 6 is operated, the ice stored in the ice storage unit 52 is discharged from the transport duct 5 through the ice crushing unit 53. At this time, the control device 7 determines whether or not to crush the ice by the operation selected on the display 6. When the ice breaker 53 was selected to break the ice, the ice breaker 53 was selected so that the ice would not be broken by breaking the ice until it was smaller than the diameter of the opening provided at the bottom of the ice breaker 53, as described above. In this case, the ice stored in the ice storage unit 52 is sent to the transport duct 5 as it is. At this time, ice is supplied to the container placed in the dispenser unit 8. When the user desires a large amount of ice or needs to confirm the remaining number of ice, the middle and lower doors 15 are opened and the ice crushing section 53 and the ice storage section 52 are pulled out toward the ice storage section 52. You can check the inside.

(Control device 7)
The control device 7 is provided behind and below the heat insulating box 1. The control device 7 controls the opening degree of the damper 44, the output of the compressor 41, the amount of air blown by the blower fan 43, and the like, so that the temperatures of the spaces of the freezing chamber 21, the refrigerating chamber 22, and the ice making chamber 23 are set. It is adjusted to the temperature.

According to the first embodiment, the heat insulating wall 4 is provided with a heating device. Therefore, the temperature of the surface of the heat insulating wall 4 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, it is possible to prevent dew condensation from forming on the surface of the heat insulating wall 4 that comes into contact with the refrigerating chamber 22.

Further, according to the first embodiment, the heat insulating wall 4 is made of a heat insulating material that suppresses heat transfer, and surrounds the ice making section 51 that manufactures ice and the ice storage section 52 that stores the ice manufactured by the ice making section 51. It has a part 62. That is, the heat insulating wall 4 covers the portion where the temperature difference is maximum inside the middle and lower chamber 13. As a result, the temperature of the surface in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, it is possible to prevent dew condensation from forming on the surface of the heat insulating wall 4 that comes into contact with the refrigerating chamber 22.

Further, according to the first embodiment, the heating device is a heat insulating part heating device 71 provided inside the heat insulating part 62 and raising the temperature of the heat insulating part 62. Therefore, the temperature of the surface of the heat insulating wall 4 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, it is possible to more reliably suppress the formation of dew condensation on the surface of the heat insulating wall 4 that comes into contact with the refrigerating chamber 22.

Further, according to the first embodiment, one side wall in the width direction of the heat insulating wall 4 is in contact with the inner wall of the heat insulating box 1 and is thinner than the other side wall in the width direction. Even in this case, the one side wall in contact with the inner wall of the heat insulating box 1 and the other side wall in contact with the refrigerating chamber 22 can each sufficiently maintain the heat insulating effect. That is, the temperature of the surface of the heat insulating wall 4 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, while limiting the amount of members used for the heat insulating wall 4 as a whole, it is possible to suppress the formation of dew on the surface of the heat insulating wall 4 in contact with the refrigerating chamber 22.

According to the first embodiment, the control device 7 for switching the temperature of the refrigerating chamber 22 is further provided. Generally, when the temperature is switched from a high state to a low state, the water content inside the refrigerating chamber 22 tends to be saturated. Therefore, dew condensation is likely to occur on the surface of the heat insulating wall 4 that comes into contact with the refrigerating chamber 22. Even in such an environment, since the heat insulating wall 4 of the first embodiment has a heating device, the temperature of the surface of the heat insulating wall 4 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. .. Therefore, it is possible to prevent dew condensation from forming on the surface of the heat insulating wall 4 that comes into contact with the refrigerating chamber 22.

Further, in general, when the return air passage inlet 36 is not on the front side but on the back side of the heat insulating box 1, the cold air blown out from the refrigerating chamber air passage hole 39 is short-circuited unless the wind speed of the cooling air is secured to some extent. Can pass. In order to prevent the cold air from making a short pass, the cold air blown out from the refrigerating chamber air passage hole 39 is blown out at an excessive wind speed for food storage. As a result, the object to be cooled near the air passage hole 39 in the refrigerating chamber may be unintentionally frozen. Further, even if the return air passage inlet 36 is located on the front side of the heat insulating box 1, if the return air passage 17 is formed on the lower side of the refrigerating chamber 22, food juice such as gravy or food slag may be present. If it spills, the return air passage 17 may be clogged.

On the other hand, in the first embodiment, each refrigerating chamber air passage hole 39 is formed behind the heat insulating box 1, and the return air passage inlet 36 is formed in front of the partition wall 11. Therefore, a sufficient distance between the refrigerating room air passage hole 39 and the return air passage inlet 36 is secured, and the cold air can efficiently cool each room without a short pass even if the wind speed is slowed down. Therefore, the food in the vicinity of the refrigerating chamber air passage hole 39 is not unintentionally frozen. Further, the partition wall 11 is located above the middle and lower chamber 13. Therefore, even if food juice such as gravy or food residue is spilled, there is no possibility that the return air passage inlet 36 will be clogged.

Embodiment 2.
FIG. 12 is a side view showing the rib member 163 according to the second embodiment. FIG. 13 is a front view showing the heat insulating wall 104 according to the second embodiment. 14 is a front view showing the heat insulating wall 104 according to the second embodiment. As shown in FIGS. 12 to 14, the heat insulating wall 104 of the second embodiment is a compartment heating device 173 further having a rib member 163 and a sealing portion 165, and a heating device provided on the outside of the heat insulating portion 162. It differs from the first embodiment in that it is different from the first embodiment. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted, and the differences from the first embodiment will be mainly described.

(Insulation part 162)
The heat insulating wall 104 is provided between the refrigerating room 22 and the ice making room 23 so as to surround the ice making part 51 and the ice storage part 52, and has a heat insulating part 162 made of a heat insulating material that suppresses heat transfer. Unlike the heat insulating portion 62 of the first embodiment, the heating device is not provided inside the heat insulating portion 162 of the second embodiment. The heat insulating portion 162 may be provided with a heating device inside.

(Rib member 163)
The rib members 163 have a long shape and are arranged in a grid pattern on the outer surface of the heat insulating portion 162 in contact with the refrigerating chamber 22, and the space outside the heat insulating portion 162 is divided into a plurality of partition areas 164. That is, the partition area 164 is a gap surrounded by the rib member 163. The rib member 163 is made of resin, for example. The thickness of the rib member 163 and the thickness of the partition area 164 are 3 mm or less. A plurality of recesses (not shown) are formed in each rib member 163, and when the intersecting rib members 163 are combined, the respective recesses are fitted together. Further, some partition areas 164 may be provided with spacers (not shown) that maintain the durability of the rib member 163.

Among the rib members 163, the rib member 163 provided so as to extend in the depth direction of the heat insulating box body 101 is inclined so as to be lowered toward the rear of the heat insulating box body 101. The inclination angle θ is about 1 to 2 ° C. Further, a drainage route (not shown) is provided behind the ice making chamber 23. As a result, the dew generated in the compartment area 164 flows backward and is guided from the drainage path to the machine room (not shown) of the refrigerator 200.

(Sealing part 165)
The sealing portion 165 covers the rib member 163 and seals air in each section region 164. The sealing portion 165 is, for example, a resin member. The sealing portion 165 may be directly attached to the rib member 163, or the portion where the rib member 163 and the sealing portion 165 are joined may be sealed with rubber or silicon so that external air does not flow into the partition region 164. You may do it. Further, when the sealing portion 165 is provided, dehumidification or the like may be performed to seal the air having a reduced water content. As described above, the rib member 163 and the sealing portion 165 seal the air in the partition region 164 to form a layer of air in which convection is suppressed, so that the heat insulating wall 104 has high heat insulating performance. In addition, a part of the partition area 164 may communicate with the adjacent section area 164 by making the recess of the intersecting portion of the rib member 163 larger than the width of the rib member 163. As a result, as described above, it is possible to secure a space for allowing the dew generated in the partition area 164 to flow backward. Even in this case, the deterioration of the heat insulating performance of the compartment area 164 is suppressed.

(Partition heating device 173)
As described above, in the second embodiment, the heating device provided on the heat insulating wall 104 is a compartment heating device 173 provided outside the heat insulating portion 162 and raising the temperature of the compartment region 164. The compartment heating device 173 may be arranged so as to raise the temperature of the plurality of compartment regions 164. Since the air is sealed in the compartment area 164, the heat generated by the compartment heating device 173 is concentrated, and the temperature of the heat insulating wall 104 rises efficiently.

FIG. 15 is a side view showing the ice making unit 3 and the heat insulating wall 104 according to the second embodiment. Generally, as shown in FIG. 14, when the ice making chamber air passage hole 161 is formed on the inner side of the ice making chamber 23 and closer to the refrigerating chamber 22, the inner side of the surfaces of the ice making chamber 23 in contact with the refrigerating chamber 22. The temperature of the ice can be lower. In this case, as shown in FIG. 15, the compartment heating device 173 is arranged on the inner side of the ice making chamber 23, and further, by increasing the number of installations or using a larger one, the inner part of the refrigerating chamber 22 is used. It is arranged so as to intensively raise the temperature of the side partition area 164.

According to the second embodiment, the heat insulating wall 104 is arranged in a grid pattern on the outer surface of the heat insulating portion 162, and has a rib member 163 and a sealing portion 165. As a result, the heat insulating wall 104 has a high heat insulating property, so that heat transfer between the inside of the ice making chamber 23 and the refrigerating chamber 22 is suppressed. Further, the heat insulating wall 104 has a heating device. Therefore, the temperature of the surface of the heat insulating wall 104 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, it is possible to more reliably suppress the formation of dew condensation on the surface of the heat insulating wall 104 that comes into contact with the refrigerating chamber 22.

Further, according to the second embodiment, the heating device is a partition heating device 173 provided on the outside of the heat insulating portion 162 and raising the temperature of the partition region 164. Thereby, the compartment heating device 173 can be arranged so as to raise only the temperature of the required compartment region 164 depending on the position of the ice making chamber air passage hole 161 so that the temperature of the heat insulating wall 104 can be efficiently raised. Therefore, it is possible to suppress the occurrence of dew condensation on the surface of the heat insulating wall 104 in contact with the refrigerating chamber 22 with lower power consumption than arranging the heating device in the entire area of the heat insulating wall 104.

Further, according to the second embodiment, among the rib members 163, the rib member 163 provided so as to extend in the depth direction of the heat insulating box body 101 is lowered toward the rear of the heat insulating box body 101. It is tilted. Therefore, the water droplets on the rib member 163 move to the rear and downward of the heat insulating box 101. Therefore, even when dew condensation occurs in the compartment area 164, the dew condensation water can be discharged to the outside of the ice making chamber 23.

(Modified Example of Embodiment 2)
FIG. 16 is a front view showing the heat insulating wall 104 according to the modified example of the second embodiment. FIG. 17 is a side view showing the ice making unit 3 and the heat insulating wall 104 according to the modified example of the second embodiment. As shown in FIG. 16, the ice making chamber air passage hole 161 is arranged near the side of the heat insulating box 101. In this case, the temperature of the wall surface of the heat insulating wall 104, which is in contact with the refrigerating chamber 22, drops slowly. At this time, as shown in FIG. 17, even if the number of compartment heating devices 173 installed is reduced or a small compartment heating device 173 is used, the temperature of the heat insulating wall 104 rises. The power consumption of the compartment heating device 173 is suppressed. In this way, the compartment heating device 173 can be arranged so as to raise only the temperature of the required compartment region 164 depending on the position of the ice making chamber air passage hole 161 so that the temperature of the heat insulating wall 104 can be efficiently raised.

Embodiment 3.
FIG. 18 is a side view showing the heat insulating wall 204 according to the third embodiment. As shown in FIG. 18, the third embodiment differs from the second embodiment in that the heating device is a rib heating device 272 provided inside the rib member 263. In the third embodiment, the same parts as those in the second embodiment are designated by the same reference numerals, and the description thereof will be omitted, and the differences from the second embodiment will be mainly described.

(Insulation part 262)
The heat insulating wall 204 is provided between the refrigerating room 22 and the ice making room 23 so as to surround the ice making part 51 and the ice storage part 52, and has a heat insulating part 262 made of a heat insulating material that suppresses heat transfer. Unlike the heat insulating portion 162 of the second embodiment, the heating device is not provided on the outside of the heat insulating portion 262 of the third embodiment. A heating device may be provided on the outside of the heat insulating portion 262.

(Rib member 263)
The rib member 263 is hollow inside and has a U-shape. The rib member 263 may have a shape in which the rib heating device 272 can be inserted. The thickness of the rib member 263 from the heat insulating portion 262 is about 3 mm.

(Rib heating device 272)
The rib heating device 272 is a wire heater that is formed in a linear shape and generates heat when energized. The wire heater has a diameter of about 2 mm. The wire heater is inserted inside the plurality of rib members 263. The rib heating device 272 is not limited to the wire heater, and may be, for example, a heat exchanger or a Pelche element as long as it can be inserted inside the rib member 263.

(Control device 206)
The control device 206 performs energization control for each wire heater so as to raise the temperature of the rib member 263 only at a necessary position. Even if the rib heating device 272 is other than the wire heater, the control device 206 may perform control.

According to the third embodiment, the rib member 263 is hollow, and the heating device is a rib heating device 272 which is inserted inside the rib member 263 and raises the temperature of the rib member 263. Thereby, the rib heating device 272 can be arranged so as to raise only the temperature of the required rib member 263 depending on the position of the ice making chamber air passage hole 61, and the temperature of the heat insulating wall 204 can be efficiently raised. Therefore, it is possible to suppress the occurrence of dew condensation on the surface of the heat insulating wall 204 in contact with the refrigerating chamber 22 with lower power consumption than arranging the heating device in the entire area of the heat insulating wall 204.

Further, according to the third embodiment, the refrigerator 300 includes a rib heating device 272 inserted into the plurality of rib members 263 and a control device 206 that individually controls the operation of each rib heating device 272. Therefore, in the ice making chamber 23 in which the rib heating device 272 is inserted into each rib member 263, the rib heating device 272 to generate heat can be selected according to the form of the refrigerator. Therefore, the ice making chamber 23 can be shared with different types of refrigerators.

Further, according to the third embodiment, the rib member 263 is a wire heater which is formed in a linear shape and generates heat when energized. Therefore, the temperature of the rib member 263 rises by energizing the refrigerator 300 during operation. As a result, the temperature of the surface of the heat insulating wall 204 in contact with the refrigerating chamber 22 rises and does not fall below the dew point. Therefore, it is possible to reliably suppress the formation of dew condensation on the surface of the heat insulating wall 204 that comes into contact with the refrigerating chamber 22.

Embodiment 4.
FIG. 19 is a front view showing the heat insulating wall 304 according to the fourth embodiment. As shown in FIG. 19, the fourth embodiment differs from the second embodiment in that the refrigerator 400 does not have a heating device. In the fourth embodiment, the same parts as those in the second embodiment are designated by the same reference numerals, and the description thereof will be omitted, and the differences from the second embodiment will be mainly described.

(Insulation wall 304)
The heat insulating wall 304 is composed of a heat insulating portion 362, a rib member 363, and a sealing portion 365, and is not provided with a heating device for raising the temperature of the heat insulating wall 304.

According to the fourth embodiment, the heat insulating wall 304 is not provided with a heating device. However, the heat insulating wall 304 suppresses heat transfer between the refrigerating chamber 22 and the ice making chamber 23 by the heat insulating portion 362 made of a heat insulating material that suppresses heat transfer and the compartment area 364 in which air is sealed. Therefore, the temperature of the surface of the heat insulating wall 304 in contact with the refrigerating chamber 22 does not drop below the dew point even if the heat insulating wall 304 does not have a heat generating device. Therefore, it is possible to suppress the occurrence of dew condensation on the surface of the heat insulating wall 304 in contact with the refrigerating chamber 22 while further suppressing the power consumption.

1 Insulation box, 2 Cooler, 3 Ice making unit, 4 Insulation wall, 5 Conveyance duct, 6 Display, 7 Control device, 8 Dispenser, 11 Partition wall, 12 Upper chamber, 13 Middle and lower chamber, 14 Upper door, 15 Middle and lower doors, 16 supply air passages, 17 return air passages, 18 freezer compartment rear walls, 19 refrigerator compartment rear walls, 21 refrigerator compartments, 22 refrigerator compartments, 23 ice making chambers, 31 shelves, 32 vegetable compartments, 33 chilled chambers, 34 Storage container, 35 chilled interior door, 36 return air passage inlet, 37 return air passage outlet, 38 freezer chamber air passage hole, 39 refrigerator compartment air passage hole, 41 compressor, 42 cooler, 43 blower fan, 44 damper, 51 Ice making part, 52 ice storage part, 53 ice breaking part, 54 ice collecting part, 55 ice breaking part main body, 56 rod-shaped member, 57 screw-shaped member, 61 ice making chamber air passage hole, 62 heat insulating part, 71 heat insulating part heating device, 100 refrigerator, 101 Insulated box, 104 Insulated wall, 161 Ice making chamber air passage hole, 162 Insulated part, 163 Rib member, 164 compartment area, 165 Sealing part, 173 compartment heating device, 200 Refrigerator, 204 Insulated wall, 206 Control device, 262 Insulation Part, 263 rib member, 272 rib heating device, 300 refrigerator, 304 heat insulating wall, 362 heat insulating part, 363 rib member, 364 compartment area, 365 sealing part, 400 refrigerator.

The refrigerator according to the present invention is provided between a box-shaped heat insulating box body in which a refrigerating chamber for storing a object to be cooled and an ice making chamber for making ice at a lower temperature than the refrigerating chamber are formed, and between the refrigerating chamber and the ice making chamber. provided, and a heat insulating wall that blocks the transfer of heat between the refrigerating compartment and the ice compartment, the heat insulating wall, a heating device to raise the temperature of the heat insulating wall is provided in the interior of the ice making compartment, the ice The ice making part and the ice storage part for storing the ice produced by the ice making part are provided, and the heat insulating wall is made of a heat insulating material that suppresses heat transfer. A plurality of long rib members arranged in a grid pattern on the outer surface to partition the space outside the heat insulating portion into a plurality of compartments, and a sealing portion that covers the rib members and seals air in each compartment. , And the rib member is hollow, and the heating device is a rib heating device that is inserted inside the rib member and raises the temperature of the rib member .

Claims (12)

A box-shaped heat-insulating box body in which a refrigerating chamber for storing objects to be cooled and an ice-making chamber for making ice at a lower temperature than the refrigerating chamber are formed.
A heat insulating wall provided between the refrigerating chamber and the ice making chamber and blocking heat transfer between the refrigerating chamber and the ice making chamber is provided.
The heat insulating wall
A refrigerator provided with a heating device that raises the temperature of the heat insulating wall. Inside the ice making room,
An ice making section for producing ice and an ice storage section for storing ice produced by the ice making section are provided.
The heat insulating wall
The refrigerator according to claim 1, further comprising a heat insulating material that suppresses heat transfer, and having a heat insulating portion that surrounds the ice making portion and the ice storage portion. The heating device is
The refrigerator according to claim 2, which is a heat insulating portion heating device provided inside the heat insulating portion and raises the temperature of the heat insulating portion. The heat insulating wall
A plurality of long rib members arranged in a grid pattern on the outer surface of the heat insulating portion and partitioning the space outside the heat insulating portion into a plurality of compartmentalized areas.
The refrigerator according to claim 2 or 3, further comprising a sealing portion that covers the rib member and seals air in each of the compartmental areas. The heating device is
The refrigerator according to claim 4, which is a compartment heating device provided outside the heat insulating portion and raises the temperature of the compartment region. The rib member is
It is hollow and
The heating device is
The refrigerator according to claim 4 or 5, which is a rib heating device that is inserted inside the rib member and raises the temperature of the rib member. The rib heating device is
Inserted into the plurality of rib members,
The refrigerator according to claim 6, further comprising a control device for individually controlling the operation of each of the rib heating devices. The rib heating device is
The refrigerator according to claim 6 or 7, which is a linear heater that is formed in a linear shape and generates heat when energized. A box-shaped heat-insulating box body in which a refrigerating chamber for storing objects to be cooled and an ice-making chamber for making ice at a lower temperature than the refrigerating chamber are formed.
A heat insulating wall provided between the refrigerating chamber and the ice making chamber and blocking heat transfer between the refrigerating chamber and the ice making chamber is provided.
Inside the ice making room,
An ice making section for producing ice and an ice storage section for storing ice produced by the ice making section are provided.
The heat insulating wall
It is made of a heat insulating material that suppresses heat transfer, and has a heat insulating part that surrounds the ice making part and the ice storage part.
A plurality of long rib members arranged in a grid pattern on the outer surface of the heat insulating portion and partitioning the space outside the heat insulating portion into a plurality of compartmentalized areas.
A refrigerator having a sealing portion that covers the rib member and seals air in each of the compartment areas. Among the rib members, the rib member provided so as to extend in the depth direction of the heat insulating box body is
The refrigerator according to any one of claims 4 to 9, which is inclined so as to be lowered toward the rear of the heat insulating box. One side wall in the width direction of the heat insulating wall is
The refrigerator according to any one of claims 1 to 10, which is in contact with the inner wall of the heat insulating box and is thinner than the other side wall in the width direction. The refrigerator according to any one of claims 1 to 11, further comprising a control device for switching the temperature of the refrigerating chamber.

Images