JP2017146023A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which is provided with a cold storage member in a storage room and efficiently cools the cold storage member to stably cool a small storage room to a desired temperature.SOLUTION: A refrigerator includes: a storage room 6 provided in a heat insulation box 2; a cooler 25 for generating cooling air; a small storage room 17 provided in the storage room 6; a cold storage member 50 which is provided facing the small storage room 17; a heat exchanger plate 52 which is provided contacting with the cold storage member 50; and a cold heat supply part 54 which supplies cold heat generated by the cooler 25 to the heat exchanger plate 52.SELECTED DRAWING: Figure 3

Description

  Embodiments of the present invention relate to refrigerators.

  In a refrigerator, another small storage room such as a chilled room may be partitioned in a storage room such as a refrigerator room. In such a refrigerator, when the small storage room is cooled to a temperature lower than that of the outer storage room or when the small storage room is rapidly cooled, the small storage room is provided in the storage room. The storage chamber outside the chamber can be inadvertently overcooled.

  Thus, for example, Patent Documents 1 and 2 listed below propose a refrigerator in which a cold storage member is provided in the chilled chamber in order to maintain the temperature in the chilled chamber at a desired set temperature.

  However, in these refrigerators, since the cool storage member is cooled by blowing air cooled by the cooler to the cool storage member, it is difficult to cool the cool storage member having a large heat capacity to a temperature lower than the set temperature of the chilled chamber. It may be difficult to stabilize at a desired set temperature.

JP2013-194941A JP2015-38391A

  Therefore, an object of the present invention is to provide a refrigerator in which a cold storage member is provided in a storage room and the cold storage member can be efficiently cooled to stably cool the small storage room to a desired temperature.

  The refrigerator of the present embodiment includes a storage room provided in the heat insulation box, a cooler that generates cold air, a small storage room provided in the storage room, and a cold storage provided facing the small storage room. It comprises a member, a heat transfer plate provided in contact with the cold storage member, and a cold supply unit for transferring cold generated by the cooler to the heat transfer plate.

It is sectional drawing of the refrigerator which concerns on 1st Embodiment of this invention. It is a figure which shows the refrigerating cycle of the refrigerator which concerns on 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a principal part expanded sectional view of the refrigerator which concerns on 2nd Embodiment of this invention. It is a principal part expanded sectional view of the refrigerator which concerns on 3rd Embodiment of this invention. It is CC sectional drawing of FIG.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The refrigerator 1 which concerns on this embodiment is provided with the heat insulation box 2 opened to the front, as shown in FIG. The heat insulation box 2 is configured by having a heat insulating material such as a vacuum heat insulating material or a foam heat insulating material in a heat insulating space 5 formed between an outer box 3 made of steel plate and an inner box 4 made of synthetic resin. . The heat insulating box 2 is provided with a plurality of storage spaces inside the inner box 4. Specifically, a refrigerating room 6 and a vegetable room 7 are provided in order from the upper stage, and an ice making room 8 and a small freezer are provided below. Chambers (not shown) are provided side by side on the left and right, and the freezer compartment 10 is provided below them.

  The refrigerator compartment 6 and the vegetable compartment 7 are both storage compartments cooled to a refrigeration temperature zone (for example, 1 to 4 ° C.), and the space between them is partitioned up and down by a partition plate 11 made of synthetic resin. . A refrigeration temperature sensor 18 for measuring the temperature in the refrigeration chamber 6 is provided on the back surface of the refrigeration chamber 6. The front opening of the refrigerator compartment 6 is provided with a rotary heat insulating door 6a pivotally supported by a hinge. On the front surface of the door 6a, there is provided an operation display unit 6b for accepting the setting of the refrigerator 1 from the user and displaying the setting status of the refrigerator 1 and the like.

  The inside of the refrigerator compartment 6 is divided into a plurality of stages in the vertical direction by a plurality of shelf boards 12. The space partitioned vertically by the partition plate 11 and the lowermost shelf 12a is partitioned in the refrigerator width direction by a vertical partition wall 13 arranged close to one side wall (left side wall) of the refrigerator compartment 6. (See FIG. 4). In a space sandwiched between the left side wall of the refrigerator compartment 6 and the vertical partition wall 13, a water storage tank 15 for storing ice-making water supplied to the automatic ice making machine 14 provided in the ice making room 8 is provided. In a space sandwiched between the vertical partition wall and the other side wall (right side wall) of the refrigerator compartment 6, a drawer container 16 is accommodated and a chilled chamber 17 described later is provided therein.

  A drawer-type heat insulating door 7 a is provided at the front opening of the vegetable compartment 7. An upper and lower two-stage storage case 20 constituting a storage container is connected to the back surface of the heat insulating door 7a. Below the vegetable compartment 7 is partitioned by a heat insulating partition wall 21 provided with a heat insulating material inside, and below the heat insulating partition wall 21, an ice making chamber 8 and a small freezer compartment are provided.

  The ice making room 8, the small freezer room, and the freezer room 10 are all cooled to a freezing temperature zone (for example, −10 to −20 ° C.). Draw-type heat insulation doors 8a and 10a are provided at the front openings of the ice making chamber 8, the small freezer compartment, and the freezer compartment 10, and storage containers 22 and 23 are connected to the rear portions of the heat insulation doors 8a and 10a. ing. A freezing temperature sensor 24 for measuring the temperature in the freezer compartment 10 is provided on the back surface of the freezer compartment 10.

  At the back of the storage room (the refrigeration room 6 and the vegetable room 7) of the refrigeration temperature zone of the heat insulation box 2, a refrigeration cooler room 27 for storing the refrigeration cooler 25 and the refrigeration fan 26, the refrigeration room 6 and the refrigeration cooling. A duct 30 connecting the chamber 27 is formed. In this example, the refrigeration cooler 25 is disposed in the vicinity of the chilled chamber 17, for example, behind the chilled chamber 17, and at least a part of the refrigerated cooler 25 faces the back surface of the chilled chamber 17 in the front-rear direction. . A refrigeration fan 26 is disposed above the refrigeration cooler 25 and sucks air (cold air) cooled by the refrigeration cooler 25 and blows it out to a duct 30 connected above the refrigeration cooler chamber 27. Further, the duct 30 extends upward from the refrigeration cooler chamber 27 along the back surface of the refrigeration chamber 6, and a plurality of air outlets 30 a opening in the refrigeration chamber 6 are provided at the front portion thereof at intervals in the vertical direction. It has been.

  At the back of the freezing temperature zone storage room (ice-making room 8, small freezing room, freezing room 10) of the heat insulation box 2, there is a freezing cooler room 33 for storing the freezing cooler 31 and the freezing fan 32, and the freezing temperature. A duct 34 is provided to connect the band storage space and the refrigeration cooler chamber 33.

  The refrigeration cooler 25 and the refrigeration cooler 31 constitute a refrigeration cycle 40 as shown in FIG. 2 together with a compressor 36 and a condenser 37 housed in a machine chamber 35 formed at the lower back of the heat insulating box 2.

  The compressor 36 is a variable capacity compressor that can change the amount of refrigerant discharged by changing the operating frequency. The compressor 37 and the inlet side of the switching valve 41 are connected in series to the discharge side. Yes. The switching valve 41 is a three-way valve that switches the refrigerant flowing from the inlet to either one of the two outlets.

  One outlet of the switching valve 41 is connected to a first refrigerant flow path in which the refrigeration decompression device 42 and the refrigeration cooler 25 are connected in series, and the other outlet of the switching valve 41 is connected to the refrigeration decompression device 43 and A second refrigerant flow path in which the refrigeration cooler 31 and the check valve 44 are connected in series is connected in parallel with the first refrigerant flow path. The piping connected to the outlet side of the refrigeration cooler 25 and the piping connected to the outlet side of the check valve 44 merge and are connected to the suction side of the compressor 36 to constitute a refrigerant circuit.

  As shown in FIGS. 3 and 5, the refrigeration cooler 25 has a large number of fins 25 b attached to a refrigerant pipe 25 a that is folded in a U shape at both ends in the width direction and formed in a meandering shape. It consists of a fin tube type cooler in which both ends are connected by an end plate 25c. Similarly to the refrigeration cooler 25, the refrigeration cooler 31 is attached to a refrigerant pipe that is folded in a U shape at both ends in the width direction and formed in a meandering shape, and the left and right ends of the meandering refrigerant pipe are connected to the ends. It consists of fin tube type coolers connected by plates.

  In the refrigeration cycle 40, the refrigerant discharged from the compressor 36 is circulated to cool the refrigeration cooler 25 and the refrigeration cooler 31. And the refrigeration cooler 25 cools the air of the refrigeration cooler chamber 27, and produces | generates the cool air of the temperature lower than melting | fusing point of the cool storage agent 50a which the cool storage member 50 mentioned later has, for example, the cool air of -10-20 degreeC. And this is supplied to the refrigerator compartment 6 from the blower outlet 30a through the duct 30 by rotation of the refrigerator fan 26. FIG. Thereby, while the refrigerator compartment 6 is cooled, the cold air supplied to the refrigerator compartment 6 distribute | circulates the outer side of the drawer container 16, and the inside of the chilled chamber 17 is indirectly cooled.

  A part of the air flowing through the refrigerator compartment 6 flows into the return duct 28 from the suction port 38 provided at the lower back of the chilled chamber 17 and returns to the refrigerator refrigerator chamber 27 to be cooled. The remaining air flows into the vegetable compartment 7 through a through hole (not shown) provided in the partition plate 11, cools the vegetable compartment 7, and then flows into the return duct 28 from the suction port 39 provided on the back of the vegetable compartment 7. It returns to the cooler chamber 27 and is cooled.

  The refrigeration cooler 31 cools the air in the refrigeration cooler chamber 33 to generate, for example, cold air of −20 to −30 ° C., which is rotated by the rotation of the refrigeration fan 32 through the duct 34, It is supplied to the freezer compartment and the freezer compartment 10, flows while cooling these storage compartments, returns from the return duct provided on the back surface of the freezer compartment 10, and returns to the freezer cooler 31 for cooling.

  In the refrigerator 1 having such a configuration, as shown in FIGS. 3 to 5, the chilled chamber 17 is partitioned in the refrigerator compartment 6 by the bottom shelf 12 a and the drawer container 16 provided immediately below the shelf 12 a. A small storage room.

  The drawer container 16 is a substantially rectangular parallelepiped container having an opening 16a on the upper surface stored in a space sandwiched between the lowermost shelf 12a and the partition plate 11, and includes a bottom wall and front and rear walls of the chilled chamber 17. And the left and right walls. The drawer container 16 slides on the partition plate 11 from the state of being stored in the space sandwiched between the lowermost shelf plate 12a and the partition plate 11, and is pulled out forward of the shelf plate 12a. Stores and removes food and other items.

  A cold storage member 50 and a heat transfer plate 52 are provided on the lower surface of the shelf 12 a that partitions the upper side of the chilled chamber 17.

  The cold storage member 50 includes a cold storage agent 50a made of a mixture having a large latent heat of fusion, and a bag-like container 50b formed of a film material such as a resin form. The regenerator 50a is composed of a mixture of water, inorganic salt, food additives, and the like, and the melting point is set to a temperature lower than the set temperature of the chilled chamber 17 (for example, 0 ° C.) by adjusting the mixing ratio. Yes. The cool storage agent 50a is accommodated in a bag-like container 50b and is formed in a substantially flat plate shape.

  The heat transfer plate 52 is made of a plate-like body formed of a material (for example, a metal plate such as an aluminum plate) having a higher thermal conductivity than the container 50b that stores the regenerator agent 50a, and the container 50b that stores the regenerator agent 50a includes It is provided in a surface contact state. In this example, the heat transfer plate 52 covers substantially the entire upper surface opening 16a of the drawer container 16 from above, and a plurality of cold storage members 50 are provided on the upper surface of the heat transfer plate 52 at intervals in the refrigerator width direction. (See FIG. 4).

  At the rear end portion of the heat transfer plate 52, there is provided a cold heat supply portion 54 that extends downward and contacts the front side of the refrigeration cooler 25 disposed behind the chilled chamber 17. The heat transfer plate 52 and the cold heat supply unit 54 are integrally formed by bending a metal plate having a predetermined shape, and the cold heat supply unit 54 supplies the cold heat generated by the refrigeration cooler 25 to the heat transfer plate 52.

  In this example, the refrigeration supply unit 54 is refrigerated and cooled along the longitudinal direction of the refrigeration cooler 25 in the side view of the refrigeration cooler 25 as shown in FIG. In contact with the vessel 25. Further, as shown in FIG. 5, the refrigeration cooler 25 that contacts the cold energy supply unit 54 is configured such that at least the front end portion of the fin 25 b that is in contact with the cold energy supply unit 54 is bent and is in surface contact with the cold energy supply unit 54. .

  The front side of the cold heat supply unit 54 (that is, the chilled chamber 17 side) is covered with a heat insulating material 56, and the front side of the heat insulating material 56 is covered with a cooler cover 57 that partitions the front side of the refrigeration cooler chamber 27. . In addition, the back side of the cold heat supply unit 54 (that is, the refrigeration cooler chamber 27 side) is covered with a heat insulating material 58 at a portion not in contact with the refrigeration cooler 25.

  The cold storage member 50 and the heat transfer plate 52 as described above are held on the lower surface of the shelf plate 12 a by the holding member 60. The holding member 60 holds these by sandwiching the upper and lower surfaces of the cold storage member 50 and the heat transfer plate 52 that are provided so as to overlap each other.

  A through hole 62 is formed in the lower surface portion of the holding member 60 facing the upper surface opening 16 a of the drawer container 16, and the through hole 62 is closed by the heat transfer plate 52 held by the holding member 60. As a result, the heat transfer plate 52 faces the upper surface of the drawer container 16 through the through hole 62, and the cold heat stored in the cold storage member 50 is supplied into the drawer container 16 through the heat transfer plate 52. The inside is cooled indirectly.

  In the refrigerator 1 according to this embodiment, since the heat transfer plate 52 provided in contact with the cold storage member 50 includes the cold supply unit 54 that supplies the cold generated by the refrigerator cooler 25, the cold storage member efficiently. 50 can be cooled, and the inside of the chilled chamber 17 can be stably cooled to the set temperature.

  Moreover, in the refrigerator 1 of this embodiment, since the inside of the chilled chamber 17 is indirectly cooled by the cool air supplied to the refrigerating chamber 6 and flowing outside the chilled chamber 17 and the cold heat of the cold storage member 50, temperature fluctuation and drying are suppressed. In addition, the inside of the chilled chamber 17 can be cooled, and the freshness maintaining performance of the food can be improved.

  In the refrigerator 1 of the present embodiment, the heat transfer plate 52 having high thermal conductivity with which the cold storage member 50 is in contact is opposed to the chilled chamber 17, so that the cold heat of the cold storage member 50 is uniformly distributed over a wide range of the drawer container 16. The inside of the chilled chamber 17 can be quickly and uniformly cooled, and when excessive cold heat is supplied from the cold heat supply unit 54, the cold heat can be stored in the cold storage member. That is, in the present embodiment, it is possible to prevent the inside of the chilled chamber 17 from being overcooled while quickly cooling the inside.

  Moreover, in this embodiment, since the front-end part of the fin 25b which the refrigeration cooler 25 has is bent and surface-contacts with the cold heat supply part 54, the cold heat which generate | occur | produced in the cold refrigerator 25 is efficiently transmitted to the cold heat supply part 54 can do.

  Moreover, in this embodiment, since the front side of the cold heat supply part 54 is covered with the heat insulating material 56, frost formation to the cooler cover 57 can be prevented while suppressing leakage of cold heat to the refrigerator compartment 6. .

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.

  In the refrigerator according to the present embodiment, the cold heat supply unit that supplies the cold heat generated by the refrigeration cooler 25 to the heat transfer plate 52 includes water, alcohol, a hydrocarbon-based refrigerant, or the like in a metal pipe such as copper. It consists of a heat pipe 64 enclosing a wick. One end of the heat pipe 64 is provided downstream of the refrigeration cooler 25 in the refrigeration cooler chamber 27 in the cold air flow direction (upper side of the refrigeration cooler 25 in FIG. 8), and the other end contacts the heat transfer plate 52. Is provided.

  Also in this embodiment, similarly to the above-described first embodiment, the heat pipe 64 can supply the heat generated by the refrigeration cooler 25 to the heat transfer plate 52, and the cool storage member 50 can be efficiently cooled. The chilled chamber 17 can be stably cooled to the set temperature.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS.

  In the refrigerator of the present embodiment, the cold supply unit that supplies the cold heat generated by the refrigeration cooler 25 to the heat transfer plate 52 is from the duct 74 partitioned by the heat transfer plate 52 through which the air cooled by the refrigeration cooler 25 flows. Become.

  As shown in FIGS. 7 and 8, the duct 74 is formed on a holding member 60 that holds the cold storage member 50 and the heat transfer plate 52. Specifically, the duct 74 is formed by a gap extending in the front-rear direction of the refrigerator formed between the plurality of cold storage members 50 on the upper surface of the heat transfer plate 52. A blower outlet 30 a is opened behind the duct 74, and cold air generated in the refrigeration cooler chamber 27 when the refrigeration fan 26 rotates is blown out from the blower outlet 30 a and introduced into the duct 74. The cold air introduced into the duct 74 cools the heat transfer plate 52 and the cold storage member 50 by flowing from the rear to the front along the heat transfer plate 52 and the cold storage member 50. The cold air that has flowed through the duct 74 is blown out into the refrigerating chamber 6 through the opening 75 provided at the front end of the holding member 60.

  Also in this embodiment, the cold air cooled by the refrigeration cooler 25 flows through the duct 74, whereby the cold heat of the refrigeration cooler 25 can be supplied to the heat transfer plate 52, and the cool storage member 50 can be efficiently cooled. The chilled chamber 17 can be stably cooled to the set temperature.

  In the present embodiment, the duct 74 as described above is provided as the cold heat supply unit in place of the cold heat supply unit 54 made of a metal plate as in the first embodiment and the heat pipe 64 as in the second embodiment. The above-described duct 74 may be provided in the holding member 60 together with the cold heat supply unit 54 made of a metal plate as in the first embodiment and the heat pipe 64 as in the second embodiment.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Thermal insulation box, 6 ... Refrigeration room, 16 ... Drawer container, 17 ... Chilled room (small storage room), 25 ... Refrigeration cooler, 25a ... Refrigerant pipe, 25b ... Fin, 25c ... End plate, 26 ... Refrigeration fan, 27 ... Refrigeration cooler room, 28 ... Return duct, 30 ... Duct, 30a ... Outlet, 34 ... Duct, 35 ... Machine room, 36 ... Compressor, 37 ... Condenser, 40 ... Refrigeration cycle, DESCRIPTION OF SYMBOLS 50 ... Cold storage member, 50a ... Cold storage member, 50b ... Container, 52 ... Heat-transfer plate, 54 ... Cold-heat supply part, 56 ... Heat insulation material, 57 ... Cooler cover, 58 ... Heat insulation material, 60 ... Holding member, 62 ... Through Hole 64 ... Heat pipe 74 ... Duct 75 ... Opening

Claims (9)

  A storage chamber provided in the heat insulation box, a cooler for generating cold air, a small storage chamber provided in the storage chamber, a cold storage member provided facing the small storage chamber, and the cold storage member A refrigerator comprising: a heat transfer plate provided in contact; and a cold heat supply unit that supplies cold heat generated by the cooler to the heat transfer plate.   The refrigerator according to claim 1, wherein the inside of the small storage room is indirectly cooled by cold air flowing outside the small storage room and the cold storage member.   The refrigerator according to claim 1 or 2, wherein cold air generated by the cooler flows along the heat transfer plate.   The refrigerator according to any one of claims 1 to 3, wherein the cold heat supply unit is provided integrally with the heat transfer plate and is provided in contact with the cooler. The cooler includes a plurality of fins,
The refrigerator according to claim 4, wherein an end portion of the fin is bent so as to be in surface contact with the cold heat supply portion.   The refrigerator according to any one of claims 1 to 5, wherein the cooler is provided in the vicinity of the small storage room. The cold storage member and the heat transfer plate are provided to face the upper surface of the small storage chamber,
The refrigerator according to any one of claims 1 to 6, wherein the cold heat supply unit is integrally provided at a rear portion of the heat transfer plate and is bent downward from the heat transfer plate.   The refrigerator according to claim 7, wherein a front side of the heat transfer plate is covered with a heat insulating material.   The refrigerator according to any one of claims 1 to 3, wherein the cold heat supply unit includes a heat pipe.

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