JP2017026174A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which suppresses temperature unevenness and occurrence of dew condensation in a low temperature storage chamber, and which has enhanced reliability.SOLUTION: A cold air duct part 32 is formed in a heat insulation material 30 of a shelf plate member 24 which serves as a ceiling of a low temperature storage chamber 23, the heat insulation material is disposed substantially up to a front end of the shelf plate member, the cold air duct part is extended and formed to the front end portion of the heat insulation material, cold air blowout ports 31 are concentrated and formed at the cold air duct portion of the heat insulation material front end portion, and a cold air return port is provided at the rear part of the low temperature storage chamber. Thereby, the cold air can be supplied even to the front portion of the low temperature storage chamber, and the portion can be prevented from falling into a situation where cold air supply is rather insufficient. At the same time, the cold air supplied to the front portion of the low temperature storage chamber flows to the cold air return port at the back of the low temperature storage chamber, that is, it flows to the back from the front portion of the low temperature storage chamber, so that the inside of the low temperature storage chamber can be cooled uniformly. Therefore, temperature unevenness in the low temperature storage chamber and occurrence of dew condensation due to this can be suppressed, and reliability can be enhanced.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a refrigerator, and more particularly to a cooling configuration of a low-temperature storage room provided in a refrigerator compartment.

  In general, a home refrigerator includes a refrigeration room, a vegetable room, a freezer room, and the like, and the chilled room is cooled to a temperature lower than that of the refrigerated room (a temperature range of about 1 ° C. is lower than that of the refrigerated room). Room) or a partial room (a room having a slight freezing temperature range of about −3 ° C.) or a low temperature storage room such as a third temperature room which can be switched to these (see, for example, Patent Document 1). .

  15 and 16 show a refrigerator described in Patent Document 1. This refrigerator is provided with a low-temperature storage chamber 102 at the bottom of the refrigerator compartment 101, and the low-temperature storage chamber 102 has a shelf whose upper surface is positioned at the lowest stage of the refrigerator compartment 101. It is configured to be covered with a shelf member 103 that is also used as a plate.

  The shelf member 103 is integrated with a heat insulating material 104 to insulate the inside of the low-temperature storage chamber 103 from the refrigerating chamber 101 having a relatively high temperature, and a cool air duct portion 105 is provided in the heat insulating material 104 to provide a refrigerator. The structure is such that cold air sent from the main body 106 side is supplied into the low temperature storage chamber 102.

  Further, an illumination device 107 for irradiating the inside of the low temperature storage chamber 102 by providing an inclined surface on the front lower surface of the shelf board member 103 is provided.

JP 2012-220047 A

  The low-temperature storage chamber described in Patent Document 1 can be cooled by blowing cool air from a large number of cool air outlets 108 provided in the cool air duct portion 105, so that it is lower than this even in the refrigerator compartment 101. It can be cooled to a temperature, for example, a low temperature of about 1 ° C. or −3 ° C. as described above, and is suitable and useful for refrigerated preservation of meat and fish.

  However, the cold air outlet 108 provided in the cold air duct portion 105 is not formed in the front portion of the shelf member 103 where the cold air duct portion 105 becomes the ceiling of the low temperature storage chamber 102.

  Accordingly, the front portion of the low temperature storage chamber 102 is undercooled, and temperature unevenness tends to occur in the low temperature storage chamber 102. In addition, condensation may occur locally due to such temperature unevenness.

  The present invention has been made in view of these points, and an object of the present invention is to provide a refrigerator with improved reliability by suppressing temperature unevenness and condensation in a low-temperature storage chamber.

In order to achieve the above object, the present invention forms a cold air duct portion in a heat insulating material of a shelf member that becomes a ceiling of a low temperature storage chamber, and the heat insulating material is disposed up to a substantially front end of the shelf member. A cold air duct portion is formed to extend to the front end portion of the heat insulating material, a cold air outlet is intensively formed in the cold air duct portion of the heat insulating material front end portion, and a cold air return port is formed in the rear portion of the low temperature storage chamber. Is provided.

  As a result, it is possible to supply cold air to the front portion of the low temperature storage chamber and prevent the portion from becoming short of the cold air supply, and the cold air supplied to the front portion of the low temperature storage chamber is the cold air return port at the rear of the low temperature storage chamber. In other words, the low temperature storage chamber can be uniformly cooled. Therefore, the temperature unevenness in the low-temperature storage chamber and the occurrence of condensation due to this can be suppressed, and the food can be cooled and stored in a good state, thereby improving the reliability.

  According to the above configuration, the present invention can provide a highly reliable refrigerator by suppressing temperature unevenness and condensation in the low-temperature storage chamber.

Front view of the refrigerator in Embodiment 1 of the present invention Front view when opening the refrigerator door in the first embodiment Vertical sectional view of the refrigerator in the first embodiment The expansion perspective view of the low-temperature storage room provided in the refrigerator compartment lower part of the refrigerator in Embodiment 1 The expanded sectional view of the low-temperature storage room of the refrigerator in Embodiment 1 The top view of the state which removed the upper heat insulating material of the shelf member which comprises the low-temperature storage room of the refrigerator in Embodiment 1 The top view which shows the low-temperature store room bottom part of the refrigerator in the same Embodiment 1 AA sectional view of FIG. 6 showing the refrigerator in the first embodiment. BB sectional view of FIG. 6 showing the refrigerator in the first embodiment Explanatory drawing which shows the lighting state in the low-temperature storage room of the refrigerator in Embodiment 1 Explanatory drawing which shows the illumination state when the low-temperature storage chamber container of the refrigerator in Embodiment 1 is pulled out The perspective view which looked at the shelf board member which comprises the low-temperature storage room of the refrigerator in Embodiment 1 from upper direction The perspective view which looked at the shelf member which comprises the low-temperature storage room of the refrigerator in Embodiment 1 from the downward direction The disassembled perspective view of the shelf board member which comprises the low-temperature storage room of the refrigerator in Embodiment 1 Schematic cross-sectional view showing the cold storage room part of a conventional refrigerator Expanded cross-sectional view showing the configuration of the conventional low-temperature storage room

  1st invention is equipped with the refrigerator main body, the refrigerator compartment provided in the refrigerator main body, and the low-temperature storage room partitioned and formed by the shelf member in the lower part of the said refrigerator compartment, The shelf board member used as the ceiling of the said low-temperature storage chamber Is a refrigerator provided with a heat insulating material that insulates the low-temperature storage chamber from the refrigerator compartment, and provided with a cold air duct portion that takes in cold air from the cold air passage at the back of the refrigerator body in the heat insulating material, the cold air duct portion being provided The heat insulating material is provided up to substantially the front end of the shelf member, the cold air duct portion is extended to the front end portion of the heat insulating material, and the cold air outlet is concentrated on the cold air duct portion of the heat insulating material front end portion. And a cold air return port is provided in the rear part of the low-temperature storage chamber.

As a result, it is possible to supply cold air to the front portion of the low temperature storage chamber and prevent the portion from becoming short of the cold air supply, and the cold air supplied to the front portion of the low temperature storage chamber is the cold air return port at the rear of the low temperature storage chamber. In other words, the low temperature storage chamber can be uniformly cooled. Therefore, the temperature unevenness in the low-temperature storage chamber and the occurrence of condensation due to this can be suppressed, and the food can be cooled and stored in a good state, thereby improving the reliability.

  According to a second invention, in the first invention, a concave portion is formed in the lower surface between the front and rear depth directions of the shelf plate member so as to bite into a cold air duct in the heat insulating material, and an illumination device is provided in the concave portion. The cold air outlet is provided in the front part of the lighting device.

  As a result, the inside of the low-temperature storage can be illuminated, so that the internal visibility can be improved, and at the same time, even if a lighting device is provided, cold air can be supplied to the front part of the low-temperature storage room. Temperature unevenness and condensation can be reliably suppressed.

  According to a third invention, in the second invention, the heat insulating material of the shelf board member is configured such that a cold air duct portion is formed by leaving a heat insulating wall zone in an outer peripheral portion of a concave portion provided with a lighting device.

  As a result, even if the periphery of the lighting device is a cold air duct portion through which cold air flows, the cold air flowing in the cold air duct portion is insulated by the heat insulating wall zone around the recess provided with the lighting device. There is no possibility that condensation occurs in the illuminating device due to cooling, and there is no concern about failure due to condensation of the illuminating device while achieving uniform cooling in the low-temperature storage chamber.

  According to a fourth invention, in the first to third inventions, a heater is disposed on a bottom surface portion facing a refrigerator main body rear side portion of a cold / warm storage chamber in which the cold air outlets are not formed in a concentrated manner.

  As a result, it is possible to suppress overcooling in the vicinity of the back part of the low temperature storage room, which is likely to be lowered by cold radiation from the cold air passage on the back of the refrigerator body, and more reliably suppress temperature unevenness and condensation in the low temperature storage room. And further improve its reliability.

  According to a fifth aspect of the present invention based on the fourth aspect, the refrigerator body includes a water supply tank chamber for ice making at a side portion of the low temperature storage chamber, and a heater is disposed at the bottom of the low temperature storage chamber adjacent to the water supply tank chamber. It is as a configuration.

  As a result, even if a water supply tank room is provided next to the low temperature storage room that cools to a relatively low temperature, the water flow in the water supply tank room is caused by the cold air in the low temperature storage room and the low temperature cold air in the cold air passage at the back of the refrigerator body. It is possible to prevent the path from icing, and to improve reliability by suppressing temperature unevenness and the occurrence of condensation in the low temperature storage chamber which is widened while expanding the low temperature storage chamber to the water tank chamber portion.

  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)
FIGS. 1-14 shows Embodiment 1 of this invention, First, the structure of the whole refrigerator is demonstrated.

1 to 3, the refrigerator according to the present embodiment includes a refrigerator main body 1 having an opening at the front, and the refrigerator main body 1 includes an outer box 2 mainly using a steel plate and an ABS as shown in FIG. 3. The inner box 3 is molded with a hard resin such as the above, and the foam heat insulating material 4 such as hard foam urethane filled between the outer box 2 and the inner box 3.

  The refrigerator body 1 is divided into a plurality of storage rooms by partition plates 5, 6, 6 a, and the top part of the refrigerator body 1 has a refrigerating room 7, a switching room 8 a and a switching room 8 a located below the refrigerating room 7. The ice making chamber 8b, the freezing chamber 9 positioned below the switching chamber 8a and the ice making chamber 8b, and the vegetable chamber 10 positioned below the freezing chamber 9 are provided.

  And the front opening part of each said store room is obstruct | occluded so that opening and closing is possible by door 11a, 11b, 11c, 11d, 11e.

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

  In addition, a cooling chamber 16 for generating cold air and a cold air passage 17 for supplying and circulating the cold air from the cooling chamber 16 to the refrigeration chamber 7, the vegetable chamber 10, and the freezing chamber 9 are provided on the rear surface of the refrigerator body 1.

  A cooler 19 is disposed in the cooling chamber 16, and a cooling fan 20 is disposed above the cooler 19. The cooling fan 20 forcibly circulates the cool air cooled by the cooler 19 through the cool air passage 17 to the refrigerating room 7, the vegetable room 10, and the freezing room 9 to cool each room.

  For example, the refrigerated room 7 is cooled to a temperature that does not freeze the food, usually 1 ° C. to 5 ° C., and the vegetable room 10 is cooled to a temperature 2 ° C. to 7 ° C. that is equal to or slightly higher than the refrigerated room 7. Further, the freezer compartment 9 is usually cooled to a freezing temperature range of −22 ° C. to −15 ° C. for frozen storage, and in some cases, for example, a low temperature of −30 ° C. or −25 ° C. to improve the frozen storage state. Sometimes it cools down.

  The refrigerating room 7 cooled by the cold air from the cooling room 16 is provided with a plurality of shelves 21 on which food is placed, and an illuminating device (not shown) is provided in front of the side wall. When the door 11a is opened, the light is turned on and the inside of the refrigerator compartment 7 is irradiated.

  The refrigerating chamber 7 has a water supply tank chamber 22 in which a water supply tank for ice making is installed at the lower portion thereof, and a chilled chamber cooled to a temperature zone of about 1 ° C. adjacent to the water supply tank chamber 22 or a slight freezing of about −3 ° C. A low-temperature storage chamber 23 that can be switched to a partial chamber cooled to a temperature zone is partitioned.

  The low temperature storage room 23 is not switchable to a chilled room or a partial room, but may be designed exclusively for a chilled room or a partial room.

  Hereinafter, the configuration of the low temperature storage chamber 23 will be described with reference to FIGS.

  First, the low-temperature storage chamber 23 is partitioned and formed with a shelf plate member 24 that is also used as a shelf plate located at the lowest stage of the refrigerator compartment 7 and a partition plate 22a that partitions the water supply tank chamber 22 on the side surface. There is a container 25 that can be pulled out inside, and the front of the container 25 is closed by a lid plate 26 that pivots around the front end of the shelf plate member 24 when the container 25 is pulled out.

  As shown in FIGS. 5 and 14, the shelf plate member 24 includes an upper plate 28 made of a glass plate or the like mounted on a synthetic resin shelf frame member 27, and a synthetic resin lower frame plate serving as a lower plate. 29 and a heat insulating material 30 such as a polystyrene foam provided between them.

  The heat insulating material 30 is formed with a cold air duct portion 32 having a large number of cold air outlets 31 opened in the lower frame plate 29, and the cold air duct portion 32 is set in the refrigerator compartment 7 by being set in the refrigerator compartment 7. The cold air is communicated with the cold air passage 17 on the back surface of the one, and the inside of the low temperature storage chamber 23 is cooled by this cold air.

  Here, the heat insulating material 30 provided with the cold air duct portion 32 is provided up to a substantially front end of the shelf member 24 to extend the cold air air duct portion 32 to a front end portion of the heat insulating material 30, and the heat insulating material. The cold air outlet 31 is formed in the cold air duct portion at the front end portion.

  In this embodiment, as shown in FIG. 5 and FIG. 6, the cold air outlet 31 is formed on the front side of the illuminating device to be described later, and the rear side of the illuminating device, that is, the vicinity of the back surface portion of the refrigerator body 1 is a non-porous portion. As a configuration, the cold air outlet 31 is concentrated on the front end portion.

  And as shown in FIG. 5, the cold air return port 43 is provided in the back side of the refrigerator main body 1 facing the said cold air blower outlet 31, ie, the rear part of the low-temperature storage chamber 23. As shown in FIG.

  Further, as shown in FIG. 7, a heater 44 is laid on the rear portion of the bottom surface facing the refrigerator main body rear side portion of the low temperature storage chamber 23 in which the cold air outlets 31 are not formed in a concentrated manner.

  The heater 44 is embedded in the partition plate 5 constituting the bottom surface of the low-temperature storage chamber 23, and is disposed so as to surround a portion that is an outer periphery of a non-porous portion in the vicinity of the back surface portion of the refrigerator body 1. That is, the rear side 44b and the both side sides 44c except for the front side 44a are arranged so as to be positioned at the corners of the low-temperature storage chamber 23. Further, the heater 44 has a shape in which the cold air return port 43 and the vicinity of the water supply tank chamber 22 are folded to close the wiring.

  Further, as shown in FIG. 8, the heat insulating material 30 of the shelf board member 24 is formed by polymerizing an upper heat insulating material 30a and a lower heat insulating material 30b, and any one of the upper heat insulating material 30a and the lower heat insulating material 30b. The cold air duct portion 32 is formed by a recess formed in one or both of the joint surfaces.

  Further, the upper and lower heat insulating materials 30a and 30b of the heat insulating material 30 are press-fitted and attached to the lower frame plate 29 of the shelf plate member 24, and the rear portion thereof is connected to the cold air passage 17 of the refrigerator main body 1 as shown in FIG. A cold air inlet 33 to be connected is provided.

  Further, the lower surface of the shelf plate member 24, that is, the lower frame plate 29 is formed with a recessed portion 34 that is recessed to bite into the cold air duct portion 32 in the heat insulating material 30 as shown in FIG. The recess 34 is fitted into a through hole 30c formed in the lower heat insulating material 30b, and an illumination device 35 is provided therein.

  The concave portion 34 is formed in a portion closer to the front than the center of the shelf plate member 24 in the front-rear depth direction so that the illumination device 35 is located in a portion closer to the front of the low-temperature storage chamber 23. In this embodiment, the concave portion 34, that is, the lighting device 35 is configured to be located on the front side of the rear end of the upper surface opening of the container 25 drawn from the low temperature storage chamber 23 as shown in FIG.

  Moreover, the outer peripheral part of the recessed part 34 of the heat insulating material 30 which accommodated the said illuminating device 35 leaves the wall zone 36 for heat insulation as shown in FIG. That is, the cold air duct part 32 is continuously formed also in the front part rather than the said illuminating device 35, and it is set as the structure which can supply cold air also to the front part of the low temperature store room 23 from the cold air blower outlet 31. FIG.

  And the heat insulation wall zone 36 formed in the outer peripheral part of the said recessed part 34 is formed so that the heat insulation zone | band width may become wider especially the part which opposes the cool air inlet 33 compared with another part.

  On the other hand, as shown in FIGS. 8 and 9, the illuminating device 35 provided in the concave portion 34 covers a substrate 37, a light source body 38 made of LEDs or the like provided on the substrate 37, and a lower portion of the light source body 38. A transparent cover 39 is used. The lighting device 35 fits the substrate 37 inside the holding piece 40 provided in the recess 34 of the lower frame plate 29 of the shelf plate member 24 and engages with the claw, and the transparent cover 39 is attached to the holding piece 40. The lower frame plate 29 is unitized by being fitted to the outside and engaged and fitted in the recess 34.

  Further, the upper heat insulating material 30a and the lower heat insulating material 30b constituting the heat insulating material 30 of the shelf board member 24 are provided with a wiring groove 41 formed by a recess method similar to the cold air duct portion 32 as shown in FIG. The lead wire 42 of the lighting device 35 is connected to a power supply lead wire (not shown) on the refrigerator main body 1 side through the wiring groove 41 through the opening 24a at the rear end portion of the shelf board member 24.

  In this embodiment, as shown in FIG. 6, the wiring groove 41 is formed forward from one end portion of the recess 34 so as to avoid the cold air outlet 31 of the cold air duct portion 32, and is bent in the lateral direction as it is. Further, it is bent backward along the side surface of the shelf board member 24.

  The opening 24a of the shelf plate member 24 is closed by the closing plate 44 (see FIG. 4) after the wiring process.

  Further, as shown in FIGS. 10 and 11, the low temperature storage chamber 23 detects the loading / unloading of the container 25 by the container detection switch 45, and detects the temperature by the temperature sensor 46 to control the supply of the cold air to a predetermined temperature. It is designed to cool down.

  About the refrigerator comprised as mentioned above, the effect is demonstrated next.

  When the refrigerator according to the present embodiment starts the cooling operation, the cold air generated in the cooling chamber 16 is supplied to the refrigerator compartment 7, the vegetable compartment 10, and the freezer compartment 9 through the cold passage 17, and the shelf board member 24. Is supplied from the cold air outlet 31 to the low temperature storage chamber 23 via the cold air duct portion 32 provided in the low temperature storage chamber.

  At this time, the cold air outlet 31 extends from the cold air duct portion 32 provided in the heat insulating material 30 of the shelf board member 24 to the front end of the shelf board member 24 and is concentrated at the front end portion. Sufficient cold air can be supplied to the front portion of the low temperature storage chamber 23 to prevent the cold air supply from becoming insufficient.

  Then, the cold air blown out from the cold air outlet 31 at the front end portion of the shelf board member 24 flows to the cold air return port 43 behind the low temperature storage chamber 23. That is, it flows from the front portion of the low temperature storage chamber 23 to the rear.

  Therefore, the inside of the low temperature storage chamber 23 can be uniformly cooled over the entire region from the front portion to the rear portion.

  As a result, the temperature unevenness in the low temperature storage chamber 23 and the occurrence of condensation due to this can be suppressed, and the food can be cooled and stored in a good state, thereby improving the reliability.

Moreover, since the heater 44 is arrange | positioned in the bottom face part which opposes the refrigerator main body 1 back side part of the cold / warm storage chamber 23 in which the said cold air outlet 31 is not concentratedly formed, it is low temperature from the cold air | gas channel | path 17 of the refrigerator main body back. It is possible to suppress overcooling in the vicinity of the back surface portion of the low-temperature storage chamber 23 that is likely to be lowered by cold radiation due to cold air, and to more reliably suppress temperature unevenness and dew condensation in the low-temperature storage chamber 23. Therefore, the reliability can be further improved.

  In particular, as shown in FIG. 7, the heater 44 is disposed along the rear corner of the low-temperature storage chamber 23 where the cold air that is supercooled by the low-temperature cold air from the cold air passage 17 on the back of the refrigerator main body is likely to stay. Therefore, the supercooling of the part can be effectively suppressed, and the occurrence of temperature unevenness can be efficiently suppressed.

  Further, since the heater 44 is disposed at the bottom of the portion adjacent to the water supply tank chamber 22 along the boundary portion with the water supply tank chamber 22, the cool air in the low temperature storage chamber 23 and the cool air passage 17 on the rear surface of the refrigerator main body. It is possible to prevent the water flow path in the water supply tank chamber 22 from icing due to the cold radiation of the low temperature cold air. Accordingly, it is possible to improve the reliability by suppressing the temperature unevenness and the occurrence of condensation while expanding the low temperature storage chamber 23 to the water tank chamber 22 portion.

  In particular, since the heater 44 is folded in the vicinity of the water tank chamber 22 and in the vicinity of the cold air return port 43 so that the wiring is dense, the temperature in the vicinity of the water tank chamber 22 and the portion near the cold air return port 43 tends to be low. The temperature drop can be reliably suppressed, and the temperature unevenness and condensation in the low temperature storage chamber 23 can be suppressed to improve the reliability.

  Moreover, in this refrigerator, since the said cold air duct part 32 is provided so that the lighting device 35 provided in the said shelf board member 24 may be enclosed, and the cold air blower outlet 31 is provided in the front part of the lighting device 35, When the cool air is blown out from the front portion to prevent the cold air supply from becoming insufficient, the inside of the low-temperature storage chamber 23 can be cooled uniformly, and when the door 11a of the refrigerating chamber 7 is opened, a lighting device (not shown) in the refrigerating chamber is shown. In addition, the illumination device 35 of the low temperature storage chamber 23 is also turned on, and the inside of the low temperature storage chamber 23 is irradiated. Therefore, the visibility of the food stored in the low-temperature storage chamber can be improved.

  In particular, in the present embodiment, the illumination device 35 is provided on the lower surface of the shelf plate member 24 in the front-rear depth direction, so that the light from the light source 38 is behind the rear end of the container 25 as shown in FIG. Irradiate until. Therefore, it is possible to brighten the inner part of the low-temperature storage chamber 23, and the food stored in the low-temperature storage chamber 23 can be clearly seen.

  Further, in this embodiment, the lighting device 35 is provided so as to be positioned in front of the rear end of the upper surface opening of the container 25 drawn out from the low-temperature storage chamber 23. Therefore, even when the container 25 is drawn out, FIG. As shown, the inside of the container 25 can be irradiated, and the visibility of the food when the container 25 is pulled out can be improved.

  On the other hand, the cold storage chamber 23 is shaped such that the cool air is flowing through the cool air duct portion 32 around the illumination device 35 and the illumination device 35 is cooled, but the cold air flowing through the cool air duct portion 32 is illuminated. Since it is insulated by the heat insulation wall zone 36 around the recess 34 provided with the device 35, it is possible to prevent the lighting device 35 from being overcooled. Therefore, condensation does not occur in the illuminating device 35, and concerns such as a short circuit failure due to condensation generation and adhesion can be eliminated and the lighting device 35 can be made highly reliable.

  In particular, in this embodiment, the heat insulation wall zone 36 around the recess 34 that accommodates the lighting device 35 is a heat insulation of the portion facing the cold air inlet 33 at the rear end of the shelf board member 24 as shown in FIG. Since the wall width for the work is formed wider than the wall band for heat insulation in other portions, it can be made more reliable.

That is, the portion of the recess 34 that faces the cold air inlet 33 is strongly cooled by the direct collision of the cold air from the cold air inlet 33, and condensation is likely to occur. However, in this embodiment, since the width of the heat insulating wall zone 36 at the portion facing the cold air inlet 33 is particularly wide, strong cooling due to the direct collision of the cold air from the cold air inlet 33 can be strongly insulated. . Therefore, it is possible to reliably prevent overcooling of the portion of the lighting device 35 facing the cold air inlet 33 to prevent condensation from occurring in the lighting device 35 and to more reliably prevent a short circuit failure due to condensation. Reliability.

  Moreover, since the said illuminating device 35 is provided in the front side part from the center of the front-back depth direction of the low-temperature storage chamber 23, even if it is a low-temperature storage chamber with the short depth dimension in the front-back direction, from the cold air inlet 33 to the illuminating device 35 The size of the cold air duct portion 32 can be secured at a predetermined level or more. As a result, it is possible to suppress an increase in the inflow resistance of the cold air into the cold air duct portion 32, and to improve the supply of the cold air into the low temperature storage chamber 23, the low temperature storage chamber 23 has a low partial temperature of −3 ° C. Even if it is a chamber, it can be reliably and uniformly cooled to that temperature.

  Further, since the illumination device 35 covers the lower portion of the light source body 38 with the transparent cover 39, it is possible to prevent the outside air that tends to occur when the door 11a of the refrigerator compartment 7 is opened and closed from entering the light source body 38 portion. Also, condensation due to intrusion of outside air can be prevented. In addition, by providing the transparent cover 39, a creeping distance to the light source body 38 can be secured, and static electricity flows from the hand etc. to the light source body 38 and the substrate 37 portion when the food is taken in and out of the low temperature storage chamber 23, which is damaged. Can also be prevented. Therefore, the reliability is further increased.

  On the other hand, since the shelf member 24 is formed by polymerizing the upper heat insulating material 30a and the lower heat insulating material 30b to form the cold air duct portion 32 therebetween, the cold air duct portion 32 can be easily formed and has high productivity. can do. That is, the upper and lower heat insulating members 30a and 30b in which the cold air passage recesses are formed are combined (the cold air passage recess may be provided in only one of the upper and lower heat insulating members 30a and 30b). As a result, the cold air duct portion 32 can be formed, and the productivity is greatly improved as compared with the case where the cold air duct portion is formed by hollowing out one heat insulating member. In addition, since the cold air passage recesses need only be formed on the overlapping surfaces of the upper and lower heat insulating members 30a and 30b, they can be formed in any shape, and the degree of freedom in the shape of the cold air passage is improved. The whole can be cooled efficiently.

  In addition, since the wiring groove 41 through which the lead wire 42 of the lighting device 35 passes is also formed by the concave portion method similar to the cold air duct portion 32, the degree of freedom of the wiring groove shape is improved as in the case of the cold air duct portion 32. . Therefore, the wiring groove 41 can be formed at a position that is not easily affected by the cold air flowing through the cold air duct portion 32, so that the condensation of the wiring itself can be prevented and the reliability can be improved. In addition, it is not necessary to prepare a lead wire mounting member separately and attach it to the shelf plate member 24 to make a lead wire wiring portion, and it is possible to reduce the number of members and the number of assembly steps by rationalizing the configuration, Productivity can be improved and cost reduction can be promoted.

  Further, since the lighting device 35 is unitized by mounting a substrate 37 and a transparent cover 39 in a recess 34 provided in the lower frame plate 29 of the shelf plate member 24, the lighting device 35 is interposed between the upper plate 28 and the lower frame plate 29. Assembling the lighting device 35 is completed at the same time as assembling the shelf member 24 by incorporating the upper and lower heat insulating materials 30a and 30b. Therefore, productivity is improved, the number of parts to be conveyed in the assembly process can be reduced, and handling of the light source body 38 and the like is facilitated.

  In particular, as shown in this embodiment, if the concave portion for the cold air duct portion 32 and the concave portion for the wiring groove 41 are provided on the side of the lower heat insulating material 30b provided with the through hole 30c, the shelf plate member 24 can be easily assembled. As a result, productivity can be further improved.

More specifically, first, the lighting device 35 is unitized by sequentially fitting and mounting the substrate 37 and the transparent cover 39 in the recess 34 of the lower frame plate 29 of the shelf plate member 24. Next, the unitized lower frame plate 29
Is turned over and the lower heat insulating material 30 b is fitted into the lower frame plate 29. In this state, as shown in FIG. 9, the lead wire 42 from the substrate 37 is pulled out from the hole Y of the recess 34 into which the substrate 37 is fitted, and is routed to the wiring groove recess formed in the lower heat insulating material 30b. When the upper heat insulating material 30a is overlapped from above and the upper plate 28 integrated with the shelf frame member 27 is set, the assembly is completed. That is, the lighting device 35 can be assembled and the lead wire 42 can be wired only on the side of the lower heat insulating material 30b fitted and mounted on the lower frame plate 29. For example, the lighting device 35 is mounted on the lower heat insulating material 30b side, and the lead wire 42 is Compared to the case of mounting on the upper heat insulating material 30a side, the assemblability is remarkably improved and the productivity is improved.

  Although the low temperature storage chamber 23 exemplified in this embodiment is not shown, the amount of cold air supplied to the cold air duct portion 32 is adjusted by a damper or the like so that the low temperature storage chamber 23 can be switched to a partial chamber or a chilled chamber. is there.

  As described above, the refrigerator of the present invention can supply cold air to the front portion of the low-temperature storage chamber 23 to prevent the portion from becoming a shortage of cold air supply, and is supplied to the front portion of the low-temperature storage chamber 23. The cool air flows to the cool air return port 43 at the rear of the low temperature storage chamber, and the inside of the low temperature storage chamber 23 can be cooled uniformly. Therefore, the temperature unevenness in the low-temperature storage chamber 23 and the occurrence of condensation due to this can be suppressed, and the cold preservation performance of food can be improved and the reliability can be enhanced.

  Although the present invention has been described using the above embodiment, the present invention is not limited to this, and it goes without saying that various modifications can be made within the scope of achieving the object of the present invention.

  For example, in the above embodiment, the cold air outlet 31 for supplying the cold air to the low temperature storage chamber 23 is provided only in the front portion and the vicinity of the back portion of the refrigerator body 1 is a non-porous portion. About one cold air outlet 31 may be provided. That is, the cold air outlet 31 may be formed in a concentrated manner at the front end portion so that the cool air blown from the front end portion occupies most of the vicinity of the back surface portion of the refrigerator body 1.

  Thus, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. That is, the scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  INDUSTRIAL APPLICABILITY The present invention can provide a highly reliable refrigerator by suppressing temperature unevenness and condensation in the low-temperature storage chamber. Therefore, it can be widely applied to many uses such as commercial refrigerators and showcases as well as home use.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 7 Refrigeration room 14 Machine room 15 Compressor 16 Cooling room 17 Cooling air passage 18 Back wall body 19 Cooler 20 Cooling fan 21 Shelf board 22 Water supply tank room 23 Low-temperature storage room 24 Shelf board member 25 Container 26 Cover board 27 Shelf Frame member 28 Upper plate 29 Lower frame plate (lower plate)
DESCRIPTION OF SYMBOLS 30 Heat insulating material 31 Cold-air outlet 32 Cold-air duct part 33 Cold-air inlet 34 Recess 35 Illumination device 36 Insulation wall zone 37 Substrate 38 Light source body 39 Transparent cover 40 Holding piece 41 Wiring groove 42 Lead wire 43 Cold-air return port 44 Heater

Claims (5)

A refrigerator body, a refrigerator compartment provided in the refrigerator body, and a low-temperature storage compartment defined by a shelf member at a lower portion of the refrigerator compartment, and the shelf member serving as a ceiling of the low-temperature storage compartment refrigerates the cold storage compartment A refrigerator provided with a heat insulating material to insulate from the room, wherein the heat insulating material is provided with a cold air duct portion for taking in cold air from a cold air passage at the back of the refrigerator main body, and the heat insulating material provided with the cold air duct portion is the shelf The plate member is provided up to substantially the front end and the cold air duct portion is extended to the front end portion of the heat insulating material, and the cold air outlet is intensively formed in the cold air duct portion of the heat insulating material front end portion, and A refrigerator provided with a cold air return port at the rear of the cold storage room. A recess is formed in the lower surface between the front and rear depth directions of the shelf member so as to bite into the cold air duct in the heat insulating material, and an illumination device is provided in the recess, and the cold air outlet is provided at a front portion of the illumination device. The refrigerator according to claim 1 provided. The refrigerator according to claim 2, wherein the heat insulating material of the shelf board member forms a cold air duct portion leaving a heat insulating wall zone in an outer peripheral portion of the concave portion provided with the lighting device. The refrigerator of any one of Claims 1-3 which has arrange | positioned the heater in the bottom face part which opposes the refrigerator main body back side part of the low-temperature storage room which has not formed the cold-air outlet centrally. 5. The refrigerator according to claim 4, wherein the refrigerator main body includes a water supply tank chamber for ice making at a side of the low temperature storage chamber, and a heater is disposed at the bottom of the low temperature storage chamber adjacent to the water supply tank chamber.