JP6028220B2 - refrigerator - Google Patents

Description

  The present invention relates to a structure for preventing condensation on the periphery of the front opening of a refrigerator.

  11 is a cross-sectional view of a basic structure of a freezer compartment of a conventional refrigerator, FIG. 12 is a perspective view of a refrigeration cycle piping of a conventional refrigerator, and FIG. 13 is a cross-sectional view of a compartment of a conventional refrigerator.

  As shown in FIGS. 11, 12, and 13, a door gasket 12 is provided on the entire inner periphery of the door 11, and is configured on the front surface of the partition wall 13 that forms the receiving surface of the door gasket 12. The metal receiving member 14 and the door gasket 12 are in close contact to prevent cold air from leaking to the outside.

  Cold air generated by a cooler 15 installed on the back of the main body is blown out from the discharge port 17 on the back of the freezer compartment 25 by a fan 16 to cool the food stored therein.

  Then, the cold air that has cooled the food reaches the upper front part of the storage cases 18 and 19, as shown by the arrows, and the space between the inner wall of the door 11 and the front surfaces of the storage cases 18 and 19, and the bottom surface of the storage case 19. Circulation returns from the return duct 21 to the cooler 15 through the space with the bottom wall of the storage chamber.

  In order to prevent the front of the partition wall 13 between the freezer compartment 25 and the upper storage chamber 22 from being cooled by the cool air reaching the front upper part of the storage case 18, and to prevent condensation on the front surface of the partition wall 13 due to the temperature difference between the inside and outside. A heat radiating pipe 23 is provided. The heat radiating pipe 23 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the front surface of the partition wall 13 to a high temperature. The front upper air was heated and the cooling efficiency was reduced.

  In order to prevent this, a mechanism has been proposed in which a seal member 24 indicated by a two-dot chain line is provided in the upper space portion of the storage case 18 in the vicinity of the partition wall 13 so as to shield the cold air flow toward the door gasket 12. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 10-96584

  However, in the above conventional configuration, the upper and lower end portions of the metal receiving member 14 extend from the surface of securing the strength to the inside of the freezer compartment 25, and this extending portion is surrounded by the heat insulating material 13a. The gap is generated due to the consideration of the property and the structural reason. Therefore, a part of the heat radiation from the heat radiating pipe 23 easily enters the freezer compartment 4 through the upper and lower end portions of the metal receiving member 14 as a heat load, reducing the efficiency of the refrigerator refrigeration system, and at the same time the surface of the metal receiving member 14 There arises a problem that condensation easily occurs.

In order to solve the above conventional problems, the refrigerator of the present invention includes an inner box, an outer box, and a heat insulating box formed by a heat insulating material filled between the inner box and the outer box, A partition wall that partitions the storage chamber of the heat insulation box vertically, a door that can be opened and closed at the front opening of the storage chamber, and a door gasket that is in close contact with a metal receiving member provided on the door side front portion of the partition wall. In the refrigerator, an opening independent space independent of the space in the storage chamber is provided in the front opening of the storage chamber, and cold air in a refrigeration temperature zone is circulated in the opening independent space .

  Thereby, an opening part independent space can suppress the heat leak of a storage chamber, and it can suppress that the metal receiving member with which the door side front part of the partition wall was cooled by the cool air in a store | warehouse | chamber.

  The refrigerator according to the present invention includes an opening independent space independent of the space in the storage chamber at the front opening of the storage chamber, so that the opening independent space can suppress heat leakage in the storage chamber, and the partition wall Condensation can be suppressed by suppressing cooling of the metal receiving member provided on the front side of the door.

The front view and longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Configuration front view of Embodiment 1 of the present invention The exploded view of the refrigerator compartment duct apparatus in Embodiment 1 of this invention The perspective view in the refrigerator compartment in Embodiment 1 of this invention The perspective view of the heat radiating pipe arrangement | positioning in Embodiment 1 of this invention The perspective view of radiation pipe arrangement in Embodiment 2 of the present invention The perspective view of the radiation pipe arrangement in Embodiment 4 of the present invention Front view and longitudinal sectional view of a refrigerator according to Embodiment 3 of the present invention Front view and longitudinal sectional view of a refrigerator according to Embodiment 4 of the present invention Front view and longitudinal sectional view of a refrigerator according to Embodiment 5 of the present invention Front view and longitudinal sectional view of a refrigerator in a sixth embodiment of the present invention The perspective view of the heat radiating pipe arrangement in Embodiment 6 of this invention The perspective view of the heat radiating pipe arrangement in Embodiment 7 of this invention Sectional view of the basic structure of a conventional refrigerator freezer Perspective view of conventional refrigerator refrigeration cycle piping Sectional view of a conventional refrigerator compartment

The invention according to claim 1 is an insulating box formed by an inner box, an outer box, a heat insulating material filled between the inner box and the outer box, and a storage chamber for the heat insulating box. In the refrigerator, comprising: a partition wall that is vertically partitioned; a door that can be opened and closed at a front opening of the storage chamber; and a door gasket that is in close contact with a metal receiving member provided on a door-side front portion of the partition wall. An opening independent space independent of the space in the storage chamber is provided in the front opening of the storage space, and cool air in a refrigeration temperature zone is circulated in the opening independent space, and the opening independent space is a heat leak of the storage chamber. It is possible to suppress the dew condensation by suppressing the cooling of the metal receiving member provided on the door side front portion of the partition wall.

  The invention according to claim 2 is the invention according to claim 1, wherein at least one of the left and right opening independent spaces of the front opening of the storage chamber is a space communicating from the upper side to the lower side of the front opening. Since the relatively high temperature air rises in the opening independent space and the relatively low temperature air falls in the space, the ambient temperature of the metal receiving member can be efficiently raised. .

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the opening independent space is provided in an opening on the front surface of the storage room having a refrigeration temperature zone. The effect of suppressing heat leakage from the storage chamber can be enhanced, and the occurrence of condensation on the metal receiving member can be suppressed.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein a heating means is provided in the vicinity of the opening independent space, and the temperature in the opening independent space is controlled. Furthermore, it can raise reliably.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view and a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view of the configuration according to Embodiment 1 of the present invention, and FIG. 3 is a refrigerator compartment according to Embodiment 1 of the present invention. FIG. 4 is an exploded view of the duct device, FIG. 4 is a perspective view of the refrigerating chamber according to Embodiment 1 of the present invention, and FIG. 5A is a perspective view of heat radiation pipe arrangement according to Embodiment 1 of the present invention.

  1 and 2, the heat insulating box 31 of the refrigerator 30 is mainly composed of an outer box 32 using a steel plate and an inner box 33 formed of a resin such as ABS, and the inside thereof includes, for example, hard foamed urethane or the like. The foam insulation material 34 is filled and insulated from the surroundings, and is divided into a plurality of storage chambers. The refrigerator compartment 35 is arranged in the upper part, and the freezer compartment 37 is arranged in the lower part.

  A freezer compartment door 38 is supported at the front opening of the refrigerating compartment 35, and a freezer compartment door 40 is pivotally supported at the front opening of the freezer compartment 37 so that the front openings can be opened and closed.

The refrigerator compartment 35 is normally set to 1 to 5 ° C. at the lower limit of the temperature at which it does not freeze for refrigerated storage, and the freezer compartment 37 is set to a freezing temperature zone, and is usually −22 ° C. to −15 ° C. for frozen storage. Although it is set, it may be set at a low temperature such as −30 ° C. or −25 ° C. in order to improve the frozen storage state.

  The refrigerating chamber 35 and the freezing chamber 37 are partitioned vertically by the partition wall 41. A door gasket 90 is provided on the inner ends of the refrigerator compartment door 38 and the freezer compartment door 40 over the entire circumference, and the cold air is brought into close contact with the outer casing 32 and the metal receiving member 42 provided on the front surface of the partition wall 41. Preventing leakage to the outside. In addition, a front door sealing member 91 that is in contact with the wall surface of the storage chamber such as the inner box 33 is disposed on the inner surface of the freezer compartment door 40. Between the door gasket 90 and the front seal member 91, an opening independent space 50 which is a space independent of the storage room space of the freezer compartment 37 and the outside is provided.

  In addition, a cooling chamber 43 that generates cool air is provided on the back surface of the freezing chamber 37, and a cooler 44 is provided inside. The cooling chamber 43 is insulated from the freezing chamber 37 by a cover coil 45. A fan 46 that forcibly blows cool air generated above the cooler 44 is disposed, and a defrost heater 47 that defrosts frost and ice adhering to the cooler 44 is provided below the cooler 44. Yes. Specifically, the defrost heater 47 is a glass tube heater made of glass, and in particular, when the refrigerant is a hydrocarbon-based refrigerant gas, a double glass tube heater in which glass tubes are formed in a double manner is adopted for explosion protection. Has been. The cover coil 45 is formed of a resin decorative plate and an inscover coil formed of a heat insulating material such as a styrene material.

  The cover coil 45 is provided side by side with the cooler 44, and a cool air return passage 71 is formed that is partitioned by the cooler 44, the partition member 75, and the back wall of the cooling chamber 43, and the cool air return passage 71 has a partition wall 41. Introduce cold air that has passed through the refrigeration room return port.

  In FIG. 3, the refrigerator compartment duct device 80 is disposed on the back surface of the refrigerator compartment 35, and the refrigerator compartment duct device 80 and the inner box 2 form an air path of the refrigerator compartment. In addition, the lower end of the refrigerator compartment duct device 80 is coupled to the partition wall 41, and the refrigerator compartment 35 is placed in the refrigerator temperature zone by circulating the refrigerator compartment discharge cold air and the return cold air.

  The refrigerator compartment duct device 80 is formed of a refrigerator compartment duct member 81 formed of foamed polystyrene and a resin refrigerator compartment duct decorative plate 86 that covers the front surface of the refrigerator compartment duct member 81, and is attached to a seal portion of the refrigerator compartment duct device 80. A seal foam member 82 is attached.

  In FIG. 4, the cold air discharged from the discharge port of the refrigerating chamber 35 through the refrigerating chamber blower duct 48 a returns to the cooler 44 through the refrigerating chamber return duct 51 a from the return port provided in the lower rear surface of the refrigerating chamber 35. .

  In FIG. 5A, the metal receiving member 42 is also provided with a heat radiating pipe 49 in order to prevent condensation on the outer surface of the storage chamber at a high outside air temperature or the like. The heat radiating pipe 49 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the metal receiving member 42 to a high temperature. The heat radiating pipe 49 is fixed in contact with the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezer compartment 37. The second heat radiating pipe 93 is fixed so as to contact the metal receiving member 42 with emphasis. About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  A part of the cold air generated by the cooler 44 in the cooling chamber 43 is forcibly blown forward by the fan 46, the freezing chamber 37 is cooled by the cold air discharged from the discharge port of the cover coil 45, and the cold air is covered by the cover coil 45. The air is guided to the lower part of the cooler 44 through a return port opened at the lower part of the heat exchanger, heat exchanged by the cooler 44, and fresh cold air is again circulated by the fan 46. As a result, the freezer compartment 37 is cooled to an appropriate temperature under the control of the freezer sensor.

  Further, the cold air discharged above the fan 46 is guided from the cold air discharge port of the cover coil 45 through the communication hole of the partition wall 41 to the refrigerator compartment duct device 80. When the room temperature is higher than the set temperature by the refrigerating room temperature sensor, the cold air discharged to the refrigerating room 35 opens the damper, discharges the cold air from the discharge port of the refrigerating room through the refrigerating room air duct 48a, and cools the room. To do. The circulated cold air is guided to the return port, becomes air in the cold room 35 and humid air contained in the storage, passes through the cold room return duct 51a of the cold room duct device 80, and cools with the cover coil 45. The cool air is returned to the lower part of the cooler 44 through the cool air return passage 77 formed by the back wall of the chamber 43 and exchanged heat with the cooler 44, so that fresh cool air is again forced by the fan. Be blown.

  As a result, even if the refrigerator compartment 35 is located away from the cooler 44, the fan 46 forcibly blows cool air to the refrigerator compartment air duct 48 a communicating with the cooler 44, and the refrigerator compartment in the refrigerator compartment duct device 80. Cold air is discharged to the refrigerating room 35 through the air duct 48a, and the opening and closing of the damper is controlled by the refrigerating room temperature sensor, so that the room can be controlled to the set temperature. In addition, the refrigerating chamber 35 is cooled by cooling air from the side surface or from the upper surface by a discharge opening or the like provided in the refrigerating chamber duct member 81.

  Here, the opening independent space 50 provided by the door gasket 90 and the front seal member 91 is a space independent of the storage chamber space and the outside of the freezer compartment 37, so that the metal receiving member 42 is cooled by the cold air of the freezer compartment 37. The front portion of the outer box 32 on the opening front side of the freezer compartment 37 is prevented from being directly cooled. Thereby, the dew condensation generation | occurrence | production of the front part of the outer case 32 which is the opening front side of the metal receiving member 42 and the freezer compartment 37 can be suppressed.

  Further, compared to the metal receiving member 42, the opening front side of the freezing chamber 37 is less affected by the cool air in the storage chamber, and the amount of heat necessary for suppressing the occurrence of condensation is small.

  As shown in FIG. 5A, by performing temperature control by switching the refrigerant circulation of the heat radiating pipe 49 to the second heat radiating pipe 93 using the switching valve 92, the opening opening of the freezer room 37 having a relatively small influence of the storage room temperature. While ensuring the amount of heat that suppresses the occurrence of dew condensation on the front portion of the outer box 32 that is the side, heat leakage from both sides of the opening front of the freezing chamber 37 to the storage chamber can also be suppressed.

(Embodiment 2)
FIG. 5B is a perspective view of the heat radiating pipe arrangement according to Embodiment 2 of the present invention.

  The heat radiating pipe 49 is fixed in contact with the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezer compartment 37. In addition, the refrigerant pipe 49 and the bypass pipe 94 are switched by the switching valve 92.

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

  Natural convection occurs in the opening independent space 50 which is an independent space different from the storage chamber, and the air cooled by the cool air discharged from the freezing chamber 37 descends in the space. In particular, when the freezing room 37 is not cooled, that is, when the freezing air in the freezing room 37 is not discharged, the natural convection causes the temperature distribution in the opening independent space 50 to become more uneven, and the low-temperature air in the space falls. The state is reached, and the rate at which the metal receiving member 42 is cooled is reduced. As a result, the amount of heat required for setting the temperature at which the metal receiving member 42 does not condense is reduced.

As described in the first embodiment, since the amount of heat of the heat radiating pipe 49 required for setting the temperature at which the metal receiving member 42 does not condense decreases, as shown in FIG. By controlling the temperature by switching the refrigerant circulation of the bypass pipe 94 and the heat radiating pipe 49 that do not pass through the periphery of the front opening, heat from the metal receiving member 42 to both sides of the opening front of the freezing chamber 37 of the heat radiating pipe 49 and the storage chamber Leakage can be efficiently suppressed.

(Embodiment 3)
FIG. 6 is a front view and a longitudinal sectional view of a refrigerator according to Embodiment 3 of the present invention.

  In FIG. 6, the refrigerating chamber 35 and the freezing chamber 37 are partitioned vertically by a partition wall 41. A door gasket 90 is provided on the inner ends of the refrigerator compartment door 38 and the freezer compartment door 40 over the entire circumference, and the cold air is brought into close contact with the outer casing 32 and the metal receiving member 42 provided on the front surface of the partition wall 41. Preventing leakage to the outside. In addition, a front door sealing member 91 that is in contact with the wall surface of the storage chamber such as the inner box 33 is disposed on the inner surface of the freezer compartment door 40. Between the door gasket 90 and the front seal member 91, there is an opening independent space 50 that is a space independent of the storage compartment space and the outside of the freezer compartment 37.

  Further, the opening independent space 50 is partially in communication with the storage room space by a space communication inlet air passage 95 that communicates with the refrigerator compartment 35 and a space communication outlet air passage 96 that communicates with the periphery of the cooling chamber 43. . The space communication inlet air passage 95 and the space communication outlet air passage 96 are spaces insulated from the storage chamber by a heat insulating member such as the foam heat insulating material 34.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. A part of the cold air generated by the cooler 44 in the cooling chamber 43 is forcibly blown forward by the fan 46, the freezing chamber 37 is cooled by the cold air discharged from the discharge port of the cover coil 45, and the cold air is covered by the cover coil 45. The air is guided to the lower part of the cooler 44 through a return port opened at the lower part of the heat exchanger, heat exchanged by the cooler 44, and fresh cold air is again circulated by the fan 46. As a result, the freezer compartment 37 is cooled to an appropriate temperature under the control of the freezer sensor.

  Further, the cold air discharged above the fan 46 is guided from the cold air discharge port of the cover coil 45 through the communication hole of the partition wall 41 to the refrigerator compartment duct device 80. When the room temperature is higher than the set temperature by the refrigerating room temperature sensor, the cold air discharged to the refrigerating room 35 opens the damper, discharges the cold air from the discharge port of the refrigerating room through the refrigerating room air duct 48a, and cools the room. To do. The circulated cold air is guided while flowing through the return port and the space communication inlet air passage 95. As a return cold air path, a path in which air having a temperature in the refrigerator compartment 35 is led from the cold air return port 77 to the lower part of the cooler 44 through the cold air return passage 71 through the cold room return duct 51a, and the space There is a path that leads to the lower part of the cooler 44 from the cool air return port 77 through the communication inlet air passage 95, the opening independent space 50, and the space communication outlet air passage 96. And the cold air which returned to the lower part of the cooler 44 carries out heat exchange with the cooler 44, and fresh cold air is forcibly ventilated by a fan again.

  The return cold air of the refrigerator compartment 35 circulates in the opening independent space 50, thereby suppressing the metal receiving member 42 from being directly cooled by the cold air of the freezer compartment 37, and the inside of the opening independent space 50 is kept in the refrigerator temperature zone. Therefore, it is possible to suppress the occurrence of dew condensation on the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezing chamber 37.

  Further, by using the temperature control means by switching the heat radiating pipe 49 shown in FIGS. 5A and 5B in combination, heat leakage into the storage chamber can be suppressed.

(Embodiment 4)
FIG. 7 is a front view and a longitudinal sectional view of the refrigerator in the fourth embodiment of the present invention, and FIG. 5C is a perspective view of the heat dissipating pipe arrangement in the fourth embodiment of the present invention.

In FIG. 7, the refrigerator compartment 35 and the freezer compartment 37 are partitioned vertically by a partition wall 41. A door gasket 90 is provided on the inner ends of the refrigerator compartment door 38 and the freezer compartment door 40 over the entire circumference, and the cold air is brought into close contact with the outer casing 32 and the metal receiving member 42 provided on the front surface of the partition wall 41. Preventing leakage to the outside. In addition, a front door sealing member 91 that is in contact with the wall surface of the storage chamber such as the inner box 33 is disposed on the inner surface of the freezer compartment door 40. Between the door gasket 90 and the front seal member 91, there is an opening independent space 50 that is a space independent of the storage compartment space and the outside of the freezer compartment 37.

  Further, a lower side heat source member 97 that generates a temperature higher than the outside air temperature is disposed around the lower side of the opening independent space 50.

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

  The lower heat source member 97 disposed on the lower side of the opening independent space 50 is a bottom metal member (not shown) having a role of constituting the contact surface of the door gasket 90 as well as ensuring the strength of the bottom and the metal receiving member 42. To conduct heat to the opening independent space 50. The heat of the lower heat source member 97 that has entered the opening independent space 50 warms the air in the space, and the warmed air rises by natural convection in the opening independent space 50. The raised warmed air rises to the vicinity of the metal receiving member 42 in the opening independent space 50, and suppresses the occurrence of condensation on the metal receiving member 42 and the front portion of the outer box 32 on the opening front side of the freezer compartment 37. Can do. The lower heat source member 97 controls the optimum amount of heat so as to ensure a temperature equal to or higher than the temperature at which dew condensation on the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezer compartment 37 can be secured.

  Further, by using the temperature control means by switching the heat radiating pipe 49 shown in FIGS. 5A and 5B in combination, heat leakage into the storage chamber can be suppressed.

  In addition, as shown in FIG. 5C, by using the lower heat source member 97 as the bottom heat radiating pipe 98 disposed on the bottom member constituting the bottom of the heat insulating box 31, the heat radiation temperature can be effectively used.

  When the amount of heat of the lower heat source member 97 is insufficient to prevent dew condensation on both sides of the freezer compartment 37 and the metal receiving member 42, a heat radiating pipe 49 is used in combination. At this time, the temperature is controlled by switching the refrigerant circulation between the bottom heat radiating pipe 98 and the heat radiating pipe 49 using the switching valve 92, whereby heat from the both sides of the freezing chamber 37 of the heat radiating pipe 49 and the metal receiving member 42 to the storage chamber. It is possible to prevent condensation on both sides of the freezer compartment 37 and the metal receiving member 42 while minimizing leakage.

(Embodiment 5)
FIG. 8: is the front view and longitudinal cross-sectional view of the refrigerator in Embodiment 5 of this invention.

  In FIG. 8, the refrigerator compartment 35 and the freezer compartment 37 are partitioned vertically by a partition wall 41. A door gasket 90 is provided on the inner ends of the refrigerator compartment door 38 and the freezer compartment door 40 over the entire circumference, and the cold air is brought into close contact with the outer casing 32 and the metal receiving member 42 provided on the front surface of the partition wall 41. Preventing leakage to the outside. In addition, a front door sealing member 91 that is in contact with the wall surface of the storage chamber such as the inner box 33 is disposed on the inner surface of the freezer compartment door 40. Between the door gasket 90 and the front seal member 91, there is an opening independent space 50 that is a space independent of the storage compartment space and the outside of the freezer compartment 37.

  In addition, the freezing chamber 37 and the third storage chamber 100 are vertically partitioned by the second partition wall 99. A door gasket 90 is provided around the entire inner edge of the third storage chamber door 101, and the outer casing 32 and the metal receiving member 42 provided on the front surface of the second partition wall 99 are in close contact with each other so that cold air is externally provided. To prevent leakage.

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

  A part of the cold air generated by the cooler 44 in the cooling chamber 43 is forcibly blown forward by the fan 46, the freezing chamber 37 is cooled by the cold air discharged from the discharge port of the cover coil 45, and the cold air is covered by the cover coil 45. The air is guided to the lower part of the cooler 44 through a return port opened at the lower part of the heat exchanger, heat exchanged by the cooler 44, and fresh cold air is again circulated by the fan 46. As a result, the freezer compartment 37 is cooled to an appropriate temperature under the control of the freezer sensor.

  Similarly, in the third storage chamber 100, the cool air generated by the cooler 44 of the cooling chamber 43 cools the inside of the third storage chamber 100 by the third storage chamber duct 102, and then opens at the lower portion of the cover coil 45. It is led to the lower part of the cooler 44 through the return port, heat is exchanged by the cooler 44, and fresh cold air is circulated again by the fan 46.

  Thus, even in a refrigerator having three or more storage rooms, the occurrence of dew condensation can be suppressed using the configuration described in the first to fourth embodiments.

(Embodiment 6)
9 and 10A, the heat insulating box 31 of the refrigerator 30 is mainly composed of an outer box 32 using a steel plate and an inner box 33 formed of a resin such as ABS. The foam insulation material 34 is filled and insulated from the surroundings, and is divided into a plurality of storage chambers. The refrigerator compartment 35 is arranged in the upper part, and the freezer compartment 37 is arranged in the lower part.

  A freezer compartment door 38 is supported at the front opening of the refrigerating compartment 35, and a freezer compartment door 40 is pivotally supported at the front opening of the freezer compartment 37 so that the front openings can be opened and closed.

  The refrigerator compartment 35 is normally set to 1 to 5 ° C. at the lower limit of the temperature at which it does not freeze for refrigerated storage, and the freezer compartment 37 is set to a freezing temperature zone, and is usually −22 ° C. to −15 ° C. for frozen storage. Although it is set, it may be set at a low temperature such as −30 ° C. or −25 ° C. in order to improve the frozen storage state.

  The refrigerating chamber 35 and the freezing chamber 37 are partitioned vertically by the partition wall 41. A door gasket 90 is provided on the inner ends of the refrigerator compartment door 38 and the freezer compartment door 40 over the entire circumference, and the cold air is brought into close contact with the outer casing 32 and the metal receiving member 42 provided on the front surface of the partition wall 41. Preventing leakage to the outside.

  In addition, a cooling chamber 43 that generates cool air is provided on the back surface of the freezing chamber 37, and a cooler 44 is provided inside. The cooling chamber 43 is insulated from the freezing chamber 37 by a cover coil 45. A fan 46 that forcibly blows cool air generated above the cooler 44 is disposed, and a defrost heater 47 that defrosts frost and ice adhering to the cooler 44 is provided below the cooler 44. Yes. Specifically, the defrost heater 47 is a glass tube heater made of glass, and in particular, when the refrigerant is a hydrocarbon-based refrigerant gas, a double glass tube heater in which glass tubes are formed in a double manner is adopted for explosion protection. Has been. The cover coil 45 is formed of a resin decorative plate and an inscover coil formed of a heat insulating material such as a styrene material.

  The cover coil 45 is provided side by side with the cooler 44, and a cool air return passage 71 is formed that is partitioned by the cooler 44, the partition member 75, and the back wall of the cooling chamber 43, and the cool air return passage 71 has a partition wall 41. Introduce cold air that has passed through the refrigeration room return port.

The metal receiving member 42 is also provided with a heat radiating pipe 49 (not shown) in order to prevent condensation on the outer surface of the storage chamber at a high outside air temperature or the like. The heat radiating pipe 49 uses a high-temperature refrigerant pipe in the refrigeration cycle, and heats the metal receiving member 42 to a high temperature. The heat radiating pipe 49 is fixed in contact with the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezer compartment 37. An opening independent pipe 150 is disposed in the foam heat insulating material 34 on the opening front side of the freezer compartment 37 so as to be in parallel with the heat radiating pipe 49.

  Further, a lower heat source member 97 that generates a temperature equal to or higher than the outside air temperature having the opening independent pipe 150 and the contact portion is disposed around the lower side of the opening independent pipe 150.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. The lower heat source member 97 disposed on the lower side of the opening independent pipe 150 and brought into contact with the opening independent pipe 150 transfers heat into the opening independent pipe 150 from the contact portion. The heat of the lower heat source member 97 that has entered the opening independent pipe 150 warms the air in the pipe, and the warmed air rises by natural convection in the opening independent pipe 150. The warmed air that has risen rises to the vicinity of the metal receiving member 42 in the opening independent pipe 150, and the occurrence of condensation on the metal receiving member 42 can be suppressed. The lower heat source member 97 controls the optimum amount of heat so as to ensure a temperature equal to or higher than the temperature at which the condensation of the metal receiving member 42 is suppressed.

  By using the bottom heat radiating pipe 98 disposed on the bottom member constituting the bottom of the heat insulating box 31 instead of the lower heat source member 97, the heat radiation temperature can be effectively used.

  Moreover, the heat leak into the storage chamber can be suppressed by using the temperature control means by switching the heat radiating pipe 49 in combination. In the case where the amount of heat of the lower heat source member 97 is not sufficient to prevent the condensation of the metal receiving member 42, the heat radiating pipe 49 is used in combination. At this time, temperature control is performed by switching the refrigerant circulation between the bottom heat radiating pipe 98 and the heat radiating pipe 49 using a switching valve 92 (not shown), so that the both sides of the freezing chamber 37 of the heat radiating pipe 49 and the metal receiving member 42 are connected. It is possible to prevent dew condensation of the metal receiving member 42 while minimizing heat leakage into the storage chamber.

  Further, in the case where a sufficient heat insulation wall thickness of the heat insulation box 31 can be ensured, the dew condensation prevention of the both sides of the freezing chamber 37 and the metal receiving member 42 of the outer box 32 and the metal receiving member 42 can be performed with heat insulation performance. It becomes possible to comprise only the part independent piping 150.

  Moreover, the efficiency of the heat transfer up and down can be improved by putting a liquid in the opening independent pipe 150, and the heat transfer can be improved by using a double pipe.

  In addition, in the dew condensation prevention structure of the metal receiving member 42 by the opening independent pipe 150 structure using the heat of the lower heat source member 97 of the present embodiment, the structure of switching the heat shortage correspondence with the heat radiation pipe 49 has been described. A structure in which an electric heater is disposed on the back surface of the metal receiving member 42 without using the heat radiating pipe 49 to compensate for a shortage of heat in the lower heat source member 97 and prevent condensation is also possible.

(Embodiment 7)
In FIG. 10B, the metal receiving member 42 is also provided with a heat radiating pipe 49 (not shown) in order to prevent condensation on the outer surface of the storage chamber at a high outside air temperature or the like. The heat radiating pipe 49 uses a high-temperature refrigerant pipe in the refrigeration cycle, and heats the metal receiving member 42 to a high temperature. The heat radiating pipe 49 is fixed in contact with the front portion of the outer box 32 on the opening front side of the metal receiving member 42 and the freezer compartment 37.

  An opening independent pipe 150 is disposed in the foam heat insulating material 34 on the opening front side of the freezer compartment 37 so as to be close to the heat radiating pipe 49.

  Further, a lower heat source member 97 that generates a temperature equal to or higher than the outside air temperature having the opening independent pipe 150 and the contact portion is disposed around the lower side of the opening independent pipe 150.

  The opening independent pipe 150 is arranged at a distance from the side surface portion of the heat insulating box 31 without being brought into contact with the outer box 32, and is embedded in the foam heat insulating material 34.

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

  The lower heat source member 97 disposed on the lower side of the opening independent pipe 150 and brought into contact with the opening independent pipe 150 transfers heat into the opening independent pipe 150 from the contact portion. The heat of the lower heat source member 97 that has entered the opening independent pipe 150 warms the air in the pipe, and the warmed air rises by natural convection in the opening independent pipe 150. The warmed air that has risen rises to the vicinity of the metal receiving member 42 in the opening independent pipe 150, and the occurrence of condensation on the metal receiving member 42 can be suppressed. The lower heat source member 97 controls the optimum amount of heat so as to ensure a temperature equal to or higher than the temperature at which the condensation of the metal receiving member 42 is suppressed.

  In the case where the heat insulation wall thickness of the heat insulation box 31 can be sufficiently secured, it is possible to prevent the condensation on the front sides of both sides of the freezer compartment 37 of the outer box 32 with heat insulation performance. At this time, since heat is not required to prevent condensation on the front sides of both sides of the freezer compartment 37 of the outer box 32, it is possible to heat the metal receiving member 42 that is vulnerable to condensation by being embedded in the heat insulating foam 34 and insulated. Can be done automatically.

  Moreover, the efficiency of the heat transfer up and down can be improved by putting a liquid in the opening independent pipe 150, and the heat transfer can be improved by using a double pipe.

  As described above, the refrigerator according to the present invention includes the opening independent space independent of the space in the storage chamber at the front opening of the storage chamber, so that the opening independent space suppresses heat leak in the storage chamber. Therefore, it can be applied to any cooling storage with a cooling function.

30 Refrigerator 35 Refrigerating room 37 Freezer room 41 Partition wall 42 Metal receiving member 49 Heat radiating pipe 50 Opening independent space 90 Door gasket 91 Front seal member 93 Second heat radiating pipe 95 Space communication inlet air path 96 Space communication outlet air path 97 Lower heat source Member 98 Bottom heat radiating pipe 99 Second partition wall 150 Opening independent pipe

Claims (4)

A heat insulating box formed by an inner box, an outer box, and a heat insulating material filled between the inner box and the outer box; a partition wall that vertically partitions a storage chamber of the heat insulating box; and the storage A refrigerator comprising a door that can be opened and closed at a front opening of a chamber, and a door gasket that is in close contact with a metal receiving member provided at a door side front of the partition wall, wherein the storage chamber has a front opening at the front opening of the storage chamber. A refrigerator comprising an opening independent space independent of a space and circulating cold air in a refrigerated temperature zone in the opening independent space . 2. The refrigerator according to claim 1, wherein at least one of the left and right opening independent spaces of the front opening of the storage chamber is a space communicating from the upper side to the lower side of the front opening. The refrigerator according to claim 1, wherein the opening independent space is provided in an opening on a front surface of a storage room having a freezing temperature zone. The refrigerator according to any one of claims 1 to 3 , further comprising a heating unit in the vicinity of the opening independent space.