JP6375510B2 - refrigerator - Google Patents

Description

  The present invention relates to a low temperature chamber configuration provided in a refrigerator compartment of a refrigerator.

  Generally, a household refrigerator includes a plurality of storage rooms such as a refrigerator room, a vegetable room, and a freezer room, and among the storage rooms, the refrigerator room includes a chilled room or a partial room that is cooled to a lower temperature than the refrigerator room. Some are equipped with a low temperature chamber. (For example, refer to Patent Document 1).

  FIG. 17 shows a refrigerator described in Patent Document 1. This refrigerator is provided with a low temperature chamber 102 in the lower part of the refrigerator compartment 101, and the low temperature chamber 102 is configured with its upper surface covered with a tray 103. An illumination device 104 for irradiating the inside of the low temperature chamber 102 is provided on the lower surface of the tray 103.

JP 2001-280775 A

  According to the low-temperature chamber configuration described in Patent Document 1 above, the semi-frozen food can be satisfactorily cooled and stored using the low-temperature chamber 102 provided in the lower part of the refrigerator compartment 101, and an advantage that the refrigerator can be easily used. There is.

  However, the low temperature chamber 102 is often provided relatively far behind the low temperature chamber 102 due to the connection with the main body side lead wire because the lighting device 104 is provided on the tray 103, and it is difficult to see the low temperature chamber. There was a problem of becoming. In addition, since the low temperature chamber 102 is provided with food or the like on the upper surface of the tray 103 serving as a ceiling surface, the food is heavy, for example, when the food is a group of beer cans placed in a basket or the like. There is a problem that it is easy to deform and it is difficult to make it wide, and there are some points to be improved.

  The present invention has been made in view of the above points, and has as its main purpose to improve the visibility in a low-temperature room and at the same time to make the low-temperature room large and to be an easy-to-use refrigerator.

The present invention, in order to achieve the above object, a cold room below the refrigerating compartment temperature is disposed at the bottom of the bottom shelf of the refrigerating compartment, an arch portion provided at the front of the cold room, the arch portion with mounting the front mounting portion of the shelf, comprising a lighting device that irradiates the cold room, and the shelf cold air inlet port communicating with the cool air passage portion of the back surface the refrigerating chamber and the cool air passage and the cool air outlet wherein the cool air passage is said formed between the top plate and bottom plate embedded insulation shelves, thickness of the cold air inlet port portion than the mounting portion of the front end is placed on the arch portion is larger so as to be formed connected to the cool air passage portion, and the placing part is attached to the cooling chamber in a state of being placed on the arch portion, the mounting section of the shelf with only the top plate the cool air passage is provided the thermal insulation rear portion from the mounting section as well as There as formed was configure.

  As a result, the low temperature part is irradiated from the front part of the low temperature chamber where the arch part is located, so that the inside is easy to see and the visibility is improved, and at the same time, the arch part supports the front end part of the shelf, so the deflection of the shelf is deformed. Thus, the low temperature chamber can be made wide and large.

  With the above configuration, the refrigerator of the present invention can be an easy-to-use refrigerator having a low-temperature room with high visibility and a wide and large volume.

Front view of the refrigerator in Embodiment 1 of the present invention Front view when opening the refrigerator door in the first embodiment 2 is a cross-sectional view taken along line AA in FIG. 2 showing the refrigerator according to the first embodiment. Schematic cross-sectional view for explaining the cold air flow of the refrigerator in the first embodiment Schematic front view for explaining the cold air flow of the refrigerator in the first embodiment Rear perspective view for explaining the cold air flow in the cooling chamber portion of the refrigerator in the first embodiment Sectional drawing of the low temperature room | chamber provided in the refrigerator compartment lower part of the refrigerator in Embodiment 1 The perspective view which shows the low temperature chamber part of the refrigerator in Embodiment 1 The perspective view when the shelf is removed from the cold room part of the refrigerator in the first embodiment Front view of the cold room portion of the refrigerator in the first embodiment The perspective view which shows the example of wiring of the illuminating device integrated in the arch part of the low temperature chamber part of the refrigerator in Embodiment 1 (A) (b) (c) Explanatory drawing which shows the shelf attachment procedure of the cold room part of the refrigerator in Embodiment 1 The perspective view of the arch part provided in the cold room part of the refrigerator in Embodiment 1 Sectional drawing of the low temperature room | chamber provided in the refrigerator compartment lower part of the refrigerator in Embodiment 2 of this invention The principal part expanded sectional view of the low-temperature chamber provided in the refrigerator compartment lower part of the refrigerator in Embodiment 2 Half-cut perspective view of the arch provided in the cold room part of the refrigerator in the second embodiment Schematic cross-sectional view showing the cold room part of a conventional refrigerator

1st invention arrange | positions the low-temperature chamber of temperature lower than a refrigerator compartment in the lower part of the shelf of the lowest part of a refrigerator compartment, provided the arch part in the front part of the said low-temperature chamber, and mounts the front end of the said shelf in the said arch part parts with placing the, an illumination device for illuminating the cold room, wherein the shelf includes a cold air inlet port and the cold air passage and the cool air outlet communicating with the cool air passage portion of the back surface the refrigerating chamber, the cool air passage wherein formed between the top plate and bottom plate embedded insulation shelves, and the thickness dimension of the cold air inlet port portion than the mounting portion of the front end for mounting is formed to be larger in the arch portion connected to the cool air passage portion, and the placing part is attached to the cooling chamber in a state of being placed on the arch portion, the mounting section before with the mounting section of the shelf is only the top plate It said heat insulating material as a configuration forming the cool air passage is provided in a more rear part That.

  As a result, the low temperature part is irradiated from the front part of the low temperature chamber where the arch part is located, so that the inside is easy to see and the visibility is improved, and at the same time, the arch part supports the front end part of the shelf, so the deflection of the shelf is deformed. Thus, the low temperature chamber can be made wide and large. In addition, since it is not necessary to provide a lighting device on the shelf, the shelf can be made detachable. When the shelf that becomes the ceiling surface of the cold room becomes dirty, it is removed from the refrigerator room to remove the dirt. It can be cleaned cleanly.

  Thus, the low temperature chamber can be efficiently cooled through the cold air passage provided in the shelf, and the cold room and the cold air passage can be cooled from the low temperature chamber and the cold air passage even if the temperature difference between the low temperature chamber and the cold air passage is large. Heat insulation can be suppressed by a heat insulating material, and condensation on the shelf surface can be prevented from sticking to food.

Thereby, the thickness dimension of the shelf placement portion can be reduced and the height of the shelf upper surface can be kept low when placed on the arch portion, and the volume reduction of the refrigerator compartment can be suppressed at the same time. + The total thickness dimension of the arm part and the thickness dimension of the cold air passage forming part where the thickness dimension tends to be large can be approximated, so that the allowance of the cold air passage forming part into the low temperature chamber can be reduced, and the arch part indoor height of the cold chamber is restricted, Ki things like reduce other words the volume be minimized out to contribute to enlargement of the cold chamber, also, only proper use of the upper plate and the heat insulating material forming the shelf By changing the thickness dimension of the shelf and placing it on the arch part, the mounting part at the front end is thinner and the cold air passage part can be thickened to form the cold air passage, and it is easy to prevent the cold room volume reduction and secure the cold room volume Can be achieved effectively.

According to a second invention, in the first invention, the heat insulating material constituting the shelf is composed of two upper and lower heat insulating members, and the mounting portion of the shelf is only a single heat insulating member and is a rear portion from the mounting portion. Has a configuration in which a cold air passage is formed as a two-layer heat insulating member.

  As a result, the thickness of the shelf can be changed only by properly using the heat insulating member, the mounting portion at the front end to be mounted on the arch portion is thin and the cold air passage portion can be thickened to form a cold air passage, and the cold room volume reduction can be prevented. A low greenhouse volume can be easily achieved.

According to a third invention, in the first invention, the arm portion that supports the shelf has a two-layer structure with a heat insulating material provided in an upper portion in contact with the placement portion of the shelf and a lighting device incorporated in the lower layer.

  As a result, heat insulation of the shelf mounting portion composed only of the upper surface plate can be performed with the heat insulating material of the arm portion in contact with the shelf mounting portion, and only the upper surface plate is effective in preventing the reduction of the refrigerator compartment volume and securing the low temperature chamber volume. Even if it is the structure which achieves automatically, it can prevent dew condensation on the shelf mounting part upper surface, and can prevent food etc. from sticking.

According to a fourth invention, in the first to third inventions, the shelf is configured to be movable to the cold air passage portion side of the back of the refrigerator compartment in a state where the placement portion is placed on the arch portion.

  As a result, even if the shelf has a thick thickness at the rear portion of the placement portion and an arch portion is present in the front portion, the shelf is moved downward from the upper side of the low temperature chamber to move the placement portion of the shelf to the arch portion. If it is moved to the rear, that is, to the cold air passage side on the back of the refrigerator compartment, the cold air inlet is connected to the cold air passage portion so that it can be smoothly installed in the refrigerator compartment, and the reverse operation By doing so, it can be removed smoothly and the shelf can be easily attached and detached.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

(Embodiment 1)
1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view when the door of the refrigerator according to Embodiment 1 is opened, and FIG. 3 is a diagram illustrating the refrigerator according to Embodiment 1. FIG. 4 is a schematic cross-sectional view for explaining the cold air flow of the refrigerator in the first embodiment, and FIG. 5 is a schematic front view for explaining the cold air flow of the refrigerator in the first embodiment. 6 is a rear perspective view for explaining the cold air flow in the cooling chamber portion of the refrigerator in the first embodiment, FIG. 7 is a cross-sectional view of a low temperature chamber provided in the lower part of the refrigerator chamber in the first embodiment, and FIG. 9 is a perspective view showing a low temperature chamber portion of the refrigerator in the first embodiment, FIG. 9 is a perspective view when the shelf is removed from FIG. 8 showing the low temperature chamber portion of the refrigerator in the first embodiment, and FIG. 10 is the same embodiment. FIG. 11 is a front view of the cold room portion of the refrigerator in FIG. The perspective view which shows the example of wiring of the illuminating device integrated in the arch part of the low temperature room part of the refrigerator in Embodiment 1, FIG.12 (a) (b) (c) is the low temperature room part of the refrigerator in the same Embodiment 1. FIG. Explanatory drawing which shows a shelf attachment procedure, FIG. 13: is a half-cut perspective view of the arch part provided in the low temperature chamber part of the refrigerator in Embodiment 1. FIG.

  First, the whole structure of a refrigerator is demonstrated.

<Fridge body configuration>
1-6, the refrigerator which concerns on this Embodiment is equipped with the refrigerator main body 1 which opened the front, This refrigerator main body 1 has the outer case 2 mainly using the steel plate as shown in FIG. The inner box 3 is made of a hard resin such as ABS, and a foam heat insulating material 4 such as hard foam urethane filled between the outer box 2 and the inner box 3. The refrigerator main body 1 is divided into a plurality of storage rooms by a partition plate 5.6. The refrigerator main body 1 has a refrigerator compartment 7 at the top, a vegetable compartment 8 at the bottom of the refrigerator compartment 7, and a freezer compartment at the bottom. 9 is arranged, and it is a middle vegetable room type refrigerator. The front opening of each storage chamber is closed by a door 10, a door 11, and a door 12 so as to be opened and closed.

  A machine room 14 is provided in the upper rear region of the refrigerator main body 1, and houses high-pressure side components of the refrigeration cycle such as the compressor 15 and a dryer (not shown) for removing moisture.

  In addition, a cooling chamber 16 that generates cool air is provided on the back surface of the refrigerator body 1. The cooling chamber 16 is formed from the back surface of the freezing chamber 9 to the lower back surface of the vegetable chamber 8, and a back partition wall body 17 is provided between the vegetable chamber 8 and a heat insulating material such as polystyrene foam. Insulated partitions.

  A cooler 18 is disposed in the cooling chamber 16, and a cooling fan 19 is disposed above the cooler 18. The cooling fan 19 forcibly circulates the cold air cooled by the cooler 18 to the refrigerating room 7, the vegetable room 8, and the freezing room 9 to cool each room. For example, the refrigerator compartment 7 is usually cooled to 1 ° C to 5 ° C at the lower limit of the temperature at which it is not frozen for refrigerated storage, and the lowermost vegetable compartment 8 is 2 ° C to 7 ° C, which is set to a temperature slightly higher than the refrigerator compartment 7 It is said. The freezer compartment 9 is set in a freezing temperature zone, and is usually set at −22 ° C. to −15 ° C. for frozen storage. For example, in order to improve the frozen storage state, for example, −30 ° C. or −25 ° C. It may be set at a low temperature of ° C.

  In the lower space of the cooler 18, a defrost heater 20 for defrosting the frost and ice adhering to the cooler 18 and its periphery is disposed as shown in FIG. A drain pan 21 for receiving defrost water generated at the time of defrosting is disposed below the defrost heater 20, and the defrost water is discharged from the deepest portion of the drain pan 21 to an evaporation tray outside the chamber via a drain tube (not shown). It is like that.

  Next, the cold air circulation configuration will be described.

<Cooling air circulation path configuration>
As shown in FIGS. 3 and 4, the cooling chamber 16 that generates cool air is provided downstream of the cooling fan 19 in the cooling chamber cool air conveyance path 30 formed between the rear partition wall body 17 and the refrigerator main body 1. Is opened, and cool air is blown into each chamber through the cooling chamber cool air conveyance path 30.

As shown in FIG. 5, the upper part of the cooling chamber cold air conveyance path 30 communicates with a refrigerated cold air passage 32 formed in a substantially central portion of the back surface of the refrigeration chamber 7 through a refrigeration chamber damper 31. A refrigerated cold air return passage 33 from the refrigeration chamber 7 is provided adjacent to the side of the refrigerated cold air passage 32, and the lower part thereof communicates with the vegetable compartment 8 and the cooling compartment 16.

  The refrigerating chamber 7 is provided with a refrigerating / cooling air inlet 35 of the refrigerating / refrigerating air passage 32 at an appropriate position in the upper part of the rear wall, and a refrigerating / refrigerating air return port 36 opened to the refrigerating / refrigerating air return passage 33 is provided at a lower position of the inner wall. Then, the cold air from the cooling chamber 16 is supplied to the refrigerating / refrigerating air passage 32 via the refrigerating chamber damper 31, and is supplied to the refrigerating chamber 7 from the refrigerating / refrigerating air inlet 35. On the other hand, the cold air after cooling in the refrigerating room is supplied from the refrigerating cold air return port 36 to the vegetable room 8 through the refrigerating cold air return passage 33 and circulates to the cooling room 16.

  As will be described later, the cold room 7 is provided with a low temperature room at the lower part thereof. As shown in FIG. 6, the low temperature room has a low temperature room damper 31a, a low temperature room cold air passage 32a, and a low temperature room cold air. It is supplied through the inlet 36a.

  In this embodiment, as is clear from FIG. 6, the cooling room cold air conveyance path 30, the refrigerated cold air passage 32, and the low temperature room cold air passage 32 a are provided on the back surface of the rear partition wall body 17 and the partition plate 6. And a return passage 38 connecting the refrigerated cold air return passage 33 and the vegetable room 8 and the cooling chamber 16 are formed. The refrigeration chamber damper 31 and the cold room cold air return passage 32a are connected to the outward passage 37. It is provided in the passage 37.

  A communication passage 39 is formed between the refrigerated cold air return passage 32 and the refrigerated cold air return passage 33 so that a part of the low temperature cold air flowing through the refrigerated cold air return passage 32 is mixed into the refrigerated cold air return passage 33. It is configured.

  Further, as shown in FIG. 6, a cold air return duct 40 is provided on the back surface of the freezer compartment 9 so as to extend downward on the side of the cooler 18 of the cooling chamber 16. The upper portion of the cold air return duct 40 is located above the return passage. 38 communicates with the vegetable compartment 8 via 38 and its lower part opens near the lower part of the cooling compartment 16, and the cold air after cooling the vegetable compartment 8 passes from the lower opening to the cooling compartment 16 via the cold return duct 40. And is configured to circulate.

  On the other hand, as shown in FIGS. 3 and 4, the freezer compartment 9 has a freezer cold air inlet 42 communicating with the lower portion of the rear cooler wall 17 at the back of the rear partition wall 17 at the upper portion of the rear wall 41. A refrigerated cold air return opening 43 is formed in the lower portion of the cooling chamber 16, and the cold air from the cooling chamber 16 is supplied from the lower portion of the cooling chamber cold air conveyance path 30 through the refrigerated cold air inlet 42. The cold air is circulated to the cooling chamber 16 via the frozen cold air return port 43.

  Next, the structure of a refrigerator, a vegetable compartment, and a freezer compartment is demonstrated.

<Refrigerator configuration>
The refrigeration chamber 7 is provided with the refrigerated cold air inlet 35 and the refrigerated cold air return port 36 as described above, and a plurality of shelves 44 are provided therein as shown in FIG. A low temperature chamber 46 shown as an embodiment of the present invention is disposed at the lower part of the refrigerator room, that is, at the lower part of the lowermost shelf 45.

  The cold room 46 is cooled to a temperature lower than that of the refrigerating room 7, for example, a temperature of about −3 ° C., and a front side of the shelf 45 is provided with a substantially quadrilateral gate arch 48 standing upright. As is apparent from FIGS. 2, 8, etc., the width of the refrigerating chamber 7 is almost full except for the ice-making water storage tank installation space 47. In the low temperature chamber 46, a cold chamber container 49 that can be freely inserted and removed is provided as shown in FIG. 7, and its front opening is covered with a lid 50 that opens and closes when the cold chamber container 49 is inserted and removed.

  Further, as shown in FIG. 13, a lighting device 51 for irradiating the inside of the low temperature chamber 46 is incorporated in the lower surface of the arch portion 48. This illuminating device 51 is constructed by incorporating an LED board substantially in the entire width of the portion on which the shelf 45 is placed, and the lead wire is wired along the arch portion 48, etc. Connected. FIG. 11 shows an example of wiring of the lead wire, which is wired by either A, B or C along the low temperature chamber forming side wall plate 46a. A connector is provided.

  Further, the shelf 45 which also serves as the ceiling surface of the low temperature chamber 46 is an engagement receiver in which engagement pieces (not shown) formed on the rear end surface of the shelf 45 are provided on both sides of the low temperature chamber cold air inlet 36a on the back of the cooling chamber. In this state, both side edges of the shelf 45 are supported by stepped rail portions 53 provided on both side walls of the refrigerator compartment, and the front end portion is attached to the portion 52 (see FIG. 9). Supported by the arch portion 48 and fixedly held at a predetermined position.

  Furthermore, as shown in FIG. 7, the shelf 45 is formed by incorporating a heat insulating material 56 such as polystyrene foam between the upper surface plate 54 and the lower surface plate 55, and the low temperature chamber at the back of the refrigerator compartment is formed in the heat insulating material 56. A cold air passage 57 is formed in which cold air is supplied from the cold room cold air inlet 36a formed in the cold air passage (communication passage portion) 32a.

  The heat insulating material 56 of this embodiment is composed of a pair of upper and lower heat insulating members 56a and 56b having a cold air passage recess, which are combined to form a cold air passage 57. By attaching the shelf 45 to the refrigerator compartment 7, it is connected to the cold room cold air inlet 36a on the back of the refrigerator compartment via a packing 36b. Further, the cold air passage 57 of the shelf 45 is formed widely over substantially the entire surface of the shelf 45, and a plurality of cold air outlets 59 are formed on the lower surface thereof, so that the cold air is uniformly supplied into the low temperature chamber 46. It is.

  Further, as apparent from FIG. 7, the shelf 45 has a thickness dimension in the vertical direction because the cold air inlet 58 connected to the cold room cold air inlet 36a of the cold room cold air passage 32a is connected to the cold room cold air inlet 36a. Although the size of the cold air passage 57 is increased, the cold air passage 57 is formed so that the thickness of the cold air passage 57 is reduced by reducing the thickness of the cold air passage 57. Further, the cold air passage 57 is not provided in the front end portion of the shelf 45, that is, the placement portion 45a on the arch portion 48, and the thickness dimension of the placement portion is set to be smaller.

  Further, as shown in FIG. 13, an illuminating device 60 made of LEDs or the like for irradiating the inside of the low temperature chamber 46 is incorporated in the lower surface of the arch portion 48 over substantially the entire lateral width of the shelf mounting portion.

  Note that an operation unit 62 (see FIG. 3) for setting the internal temperature of each room, ice making, rapid cooling, and the like is disposed at an appropriate side wall of the refrigerator compartment 7.

<Vegetable room configuration>
As shown in FIG. 3 and the like, the vegetable compartment container 63 is disposed in the vegetable compartment 8. The vegetable compartment container 63 is fitted into a rail-like support member attached to the inner surface of the door 11 and opens and closes the door 11. It can be taken in and out of the vegetable room 8. The vegetable compartment container 63 is composed of a lower container 64 and an upper container 65 placed on the upper surface opening thereof.

  Moreover, the said vegetable compartment 8 is provided with the space between the said vegetable compartment container 63, the partition plate 6 under it, and the inner peripheral wall surface of the vegetable compartment 8, and the said space comprises the air path through which cold air | flow flows.

<Freezer configuration>
As already described with reference to FIG. 3, the freezer compartment 9 is formed with a freezer cold air inlet 42 communicating with the lower part of the cooler compartment air passage 30 at the back of the rear partition wall body 17 at the upper part of the rear wall, and the lower part of the rear wall. A freezing cold air return port 43 communicating with the freezing chamber 9 is formed. Although not shown in the structural diagram, a freezer damper is also incorporated at an appropriate position in the passage from the cooling chamber 16 to the freezer compartment 9. The freezer compartment 9 is also provided with a freezer compartment container 66 placed on the frame of the door 12 as shown in FIG. 3 and the like, and an ice making device 67 is provided above the freezer compartment container 66. It has been incorporated.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the operation of the refrigeration cycle will be described.

  The refrigeration cycle operates according to the temperature set in the refrigerator, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 15 is condensed to some extent by a condenser (not shown), and further, refrigerant piping (not shown) disposed on the side and rear surfaces of the refrigerator and the front opening of the refrigerator. Etc.), while condensing and liquefying while preventing condensation in the refrigerator, it reaches a capillary tube (not shown). Thereafter, the capillary tube is depressurized while exchanging heat with a suction pipe (not shown) to the compressor 15 and becomes a low-temperature and low-pressure liquid refrigerant and reaches the cooler 18 in the cooling chamber. Here, the refrigerant in the cooler 18 evaporates, and cool air for cooling each storage chamber is generated in the cooling chamber 16 having the cooler 18.

  Next, the cooling operation by the cold air circulation will be described.

  The low-temperature cold air generated in the cooling chamber 16 is sent by the cooling fan 19 from the cooling chamber cold-air conveyance path 30 to the refrigerator compartment 7 and the freezer compartment 9, and the cold air supplied to the refrigerator compartment 7 cools the refrigerator compartment 7. After that, it is supplied to the vegetable room 8 and each room is cooled to the set temperature. Then, the cold air after cooling each chamber returns to the cooling chamber 16 again, is cooled by the cooler 18, and is circulated to each chamber by the cooling fan 19. In addition, the supply of cold air to each of the above chambers is performed by operating / stopping the compressor 15 and the cooling fan 19 based on the temperatures detected by the refrigerator temperature detecting means and the freezer temperature detecting means (both not shown), and the refrigerator damper. 31, the low temperature chamber damper 31a and the freezing chamber damper are controlled to be opened and closed, and the respective chambers are maintained in a set temperature range.

  Next, the effect of the low temperature chamber, which is a feature of the present invention, will be described.

  First, the cold room 46 is cooled by being supplied with cold air from a cold room cold air inlet 36a formed in the cold room cold air passage 32a on the back of the cooling room. Since this cold air flows through the cold air passage 57 of the shelf 45 constituting the ceiling surface of the low temperature chamber 46 and is blown into the low temperature chamber 46 from a plurality of cold air outlets 59 provided on the lower surface thereof, the low temperature chamber 46 is discharged from the refrigerator room 7. Can be evenly cooled to a low temperature.

  Here, since the low temperature chamber 46 is supported by placing the mounting portion 45a at the front end of the shelf 45 serving as the ceiling surface on the arch portion 48, the beer can group placed in the basket on the shelf 45, for example. Even if heavy food materials such as the above are placed, it is possible to prevent the deformation of the shelf 45 and the like. Therefore, the low temperature chamber 46 can be wide and large as shown in this embodiment, and at the same time, even a wide shelf can prevent deformation and the like of the shelf and has high reliability. be able to.

Moreover, since the illuminating device 60 is built in the arch part 48 which supports the mounting part 45a of the shelf 45, the food in the low temperature room is irradiated from the front side, and the food in the inside becomes easy to visually recognize. Moreover, since the lighting device 60 is mounted on the arch portion 48 that does not need to be attached and fixed to the refrigerator compartment 7, it is necessary when the lighting device is attached to the lower surface of the shelf itself so that the shelf can be removed. It is possible to adopt a simple wiring structure without requiring a lead wire attaching / detaching configuration, and at the same time, it is not necessary to use a shelf 45 fixing method so that the user does not attach / detach the lead wires, and visibility in a low temperature room It is possible to achieve both improvement and cleanability by making the shelf detachable.

  Further, since the shelf 45 is configured by incorporating a heat insulating material 56 between the upper surface plate 54 and the lower surface plate 55, low temperature conduction from the low temperature chamber 46 and the cold air passage 57 to the refrigerating chamber 7 is suppressed by the heat insulating material 56. Even if the temperature difference between the low temperature chamber 46 and the cold air passage 57 and the refrigerator compartment 7 is large, condensation on the surface of the shelf 45 can be prevented and food or the like can be prevented from sticking.

  Further, since the shelf 45 forms the cold air passage 57 by combining a pair of heat insulating members 56a and 56b having a cold air passage recess formed therein, the cold air passage 57 can be easily formed. The productivity is improved as compared with the case where the air passage is formed by hollowing out, and at the same time, the degree of freedom of the shape of the cold air passage is improved, and an optimal cold air passage for efficiently cooling the entire low temperature chamber can be formed.

  Moreover, since the shelf 45 is provided with a cold air passage 57 in the cold air inlet side portion behind the placement portion 45a placed on the arch portion 48 and no cold air passage is provided in the placement portion 45a, the cold air passage 57 is provided. Even if the shelf has a thickness dimension that tends to increase, the height of the shelf upper surface when it is placed on the arch 48 with the thickness dimension of the placement portion 45a of the shelf 45 being reduced (to the refrigerator compartment) ) Can be kept low and volume reduction of the refrigerator compartment 7 can be suppressed. At the same time, by adopting the above configuration, it is possible to further approximate the total thickness dimension of the mounting portion 45a + the arm portion 48 of the shelf 45 and the thickness dimension of the cold air passage forming portion where the thickness dimension tends to be large. The downward projecting dimension of the cold air passage forming portion into the low temperature chamber can be reduced, and the indoor height of the low temperature chamber 46 restricted by the arch portion 48 is reduced, in other words, the volume is reduced to minimize the low temperature chamber 46. Can contribute to the increase in size.

  In addition, as described above, the heat insulating material 56 constituting the shelf 45 is composed of the upper and lower two-layer heat insulating members 56a and 56b, and the shelf mounting portion 45a is composed of only one heat insulating member 56a and the mounting portion 45a. The rear portion has a structure in which the cold air passage 57 is formed as the two-layer heat insulating members 56 a and 56 b, so that the thickness of the shelf 45 is changed only by properly using the heat insulating member 56, and the mounting portion at the front end is mounted on the arch portion 48. 45a is thin and the cold air passage portion is thick so that the cold air passage 57 can be formed, so that it is possible to easily prevent the reduction of the refrigerator compartment volume and secure the low temperature compartment volume.

  Further, the shelf 45 is detachably attached by engaging engagement pieces formed on the rear end surface thereof with engagement receiving portions 52 provided on both sides of the cold room cold air inlet 36a on the rear surface of the cooling chamber. When the upper surface of 45 is dirty, it can be removed from the refrigerator compartment 7 and cleaned cleanly, and can be kept hygienic even when used for a long time.

  The shelf 45 is attached to and detached from the mounting portion 45a because the thickness of the rear portion is larger due to the presence of the cool air passage 57, and the cool air inlet 58 at the rear end of the shelf is aligned with the cold room cool air inlet 36a on the rear side of the refrigerator compartment. When moving horizontally from the rear to the rear, this thick rear portion hits the arch 48. However, since the shelf 45 has a mounting portion 45a having a small thickness at the front end, it can be easily attached / detached as follows. That is, as shown in FIG. 12 (a), the mounting is performed by first moving the cold chamber 46 from the upper side to the lower side so that the mounting portion 45a of the shelf 45 is brought into contact with the arch portion 48, and thereafter (b) of FIG. If it is moved rearward as it is, i.e., to the back side of the refrigerating room, the cold air inlet 58 is press-connected to the low temperature room cold air inlet 36a opened on the back side of the refrigerating room as shown in FIG. Can be installed in the refrigerator compartment 7 smoothly. Moreover, it can remove smoothly by performing reverse operation | movement.

(Embodiment 2)
14 is a cross-sectional view of the low temperature chamber 46 in the second embodiment, FIG. 15 is an enlarged cross-sectional view of the main part of the low temperature chamber 46, and FIG. 16 is a half cut of the arch portion provided in the low temperature chamber portion of the refrigerator in the second embodiment. It is a perspective view.

  The shelf 45 of the low temperature chamber 46 shown in the second embodiment has a mounting portion 45a constituted only by an upper surface plate 54. In other words, the front portion of the upper heat insulating member 56 a located directly below the upper surface plate 54 is cut away so that only the rear portion necessary for forming the cool air passage 57 is formed.

  Thereby, the height to the shelf upper surface when the shelf 45 is placed on the arch portion 48 can be further reduced by the plate thickness of the upper heat insulating member 56a, and the volume reduction of the refrigerator compartment 7 can be further reduced. it can. That is, the volume reduction of the refrigerator compartment 7 caused by the addition of the heat insulating material and the addition of the arch portion so as to have the heat insulating property and the bending deformation resistance can be minimized, and the stickiness on the shelf surface can be improved by improving the heat insulating property. The capacity of the low temperature chamber 46 can be increased by maximizing the effect of widening the low temperature chamber by preventing and improving the bending deformation resistance.

  The arm portion 48 that supports the shelf 45 has a two-layer structure with an arch portion heat insulating material 61 provided on the upper portion in contact with the placement portion 45a of the shelf 45 and a lighting device 60 incorporated in the lower layer.

  Thereby, the mounting portion 45a composed only of the upper surface plate 54 can be insulated by the heat insulating material 61 for the arch portion of the arm portion 48 in contact with the mounting portion 45a, and the mounting portion at the front end to be mounted on the arch portion 48. 45a can be made thinner. Therefore, it is possible to prevent condensation on the upper surface of the mounting portion and prevent the foods and the like from sticking, and at the same time, it is possible to more effectively achieve the reduction of the refrigerator compartment volume and the securing of the low-temperature compartment volume.

  Although the embodiment of the present invention has been described above, the configuration described in the above embodiment is shown as an example for carrying out the present invention, and various modifications can be made within the scope of achieving the object of the present invention. Needless to say.

  For example, in this embodiment, the heat insulating member 56 constituting the shelf 45 is exemplified by the heat insulating members 56a and 56b divided into upper and lower parts, but this may be divided into right and left parts.

  Moreover, although the cool air passage 57 illustrated what was formed between a pair of heat insulation members, this formed the lower surface board 55 and the upper heat insulation member 57a by superposing | polymerizing the lower surface board 55 under the upper heat insulation member 57a directly. Alternatively, any configuration may be used as long as at least the cold room side of the cold air passage 57 is covered with the heat insulating material 56.

  The refrigerator according to the present invention can be an easy-to-use refrigerator having a low-temperature room with good visibility and a wide and large-volume cold room, and can be widely applied not only to home use but also to commercial refrigerators.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 5,6 Partition plate 7 Refrigeration room 8 Vegetable room 9 Freezing room 10,11,12 Door 14 Machine room 15 Compressor 16 Cooling room 17 Back surface partition wall body 18 Cooler 19 Cooling fan 20 Defrost heater 21 Drain pan 30 Cooling room cold air passage 31 Refrigerating room damper 31a Low greenhouse damper 32 Refrigerated cold air passage 32a Low greenhouse cold air passage (cold air passage)
33 Refrigerated cold air return passage 34 Freezer compartment damper 35 Refrigerated cold air inlet 36 Refrigerated cold air return port 36a Low greenhouse cold air inlet 37 Outward passage 38 Return passage 39 Communication passage 40 Cold air return duct 41 Back wall body 42 Refrigerated cold air inlet 43 Refrigerated cold air return port 44 Shelf 45 Shelf 45a Placement part 46 Low greenhouse 47 Storage tank installation space 48 Arch part 49 Low greenhouse container 50 Lid 51 Illumination device 52 Engagement receiving part 53 Stepped rail part 54 Upper surface plate 55 Lower surface plate 56 Thermal insulation material 57 Cold air passage 58 Cold air inlet 59 Cold air outlet 61 Insulating material for arch part 62 Operation part 63 Vegetable room container 64 Lower container 65 Upper container 66 Freezer room container 67 Ice making device

Claims (4)

The cold room is lower than the refrigerating compartment temperature is disposed at the bottom of the bottom shelf of the refrigerating compartment, an arch portion provided at the front of the cold room, with placing the front mounting portion of the shelf to the arch portion , an illumination device for illuminating the cold room, wherein the shelf includes a cold air inlet port and the cold air passage and the cool air outlet communicating with the cool air passage portion of the back surface the refrigerating chamber, the cool air passage and the upper plate of the shelf formed between embedded in the lower plate insulation connected to the cool air passage section thickness of the cold air inlet port portion than the mounting portion of the front end for mounting is formed to be larger in the arch portion the adiabatic, and the placing part is attached to the cooling chamber in a state of being placed on the arch portion, the rear portion from the mounting section with the mounting section of the shelf is only the top plate refrigerator to form the cool air passage provided wood. The heat insulating material constituting the shelf is composed of two layers of upper and lower heat insulating members, and the mounting portion of the shelf is only a single heat insulating member, and the rear portion from the mounting portion forms a cold air passage as a two-layer heat insulating member. The refrigerator according to 1. The refrigerator according to claim 1, wherein the arm portion supporting the shelf has a two-layer structure of upper and lower portions, and a heat insulating material is provided in an upper portion in contact with the placement portion of the shelf and a lighting device is incorporated in a lower layer. The refrigerator according to any one of claims 1 to 3, wherein the shelf is configured to be movable toward the cold air passage portion on the back of the refrigerator compartment in a state where the placement portion is placed on the arch portion.

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