JP2013061134A - Refrigerator - Google Patents

Abstract

An object of the present invention is to provide a refrigerator capable of preventing condensation on a heat insulating door provided with a glass plate.
In a refrigerator provided with a heat insulating door 2a for opening and closing a storage room, the heat insulating door 2a includes a glass plate 20 disposed on the front surface, an inner surface plate 21 of a resin molded product disposed on the rear surface, and a glass plate 20. And a foam heat insulating material 25 filled between the inner plate 21 and the metal plate 26 disposed between the glass plate 20 and the foam heat insulating material 25.
[Selection] Figure 5

Description

  The present invention relates to a refrigerator that opens and closes a storage room with a heat insulating door.

  A conventional refrigerator is disclosed in Patent Document 1. A conventional refrigerator includes an evaporator behind the storage room, and the storage room is cooled by cold air generated by heat exchange with the evaporator. The front opening of the storage room is opened and closed by a heat insulating door.

  The heat insulating door has a glass plate disposed on the front surface and an inner surface plate of a resin molded product disposed on the back surface. A foam heat insulating material is filled between the glass plate and the inner surface plate. By arranging the glass plate on the front surface of the heat insulating door, it becomes a refrigerator with a glossy feeling and a high-class feeling, and the design can be improved. Moreover, since the front surface (outer surface) is smooth compared with a steel plate, the cleaning property can be improved.

JP 2010-60190 A (page 3, page 4, FIG. 1, FIG. 3)

  However, according to the conventional refrigerator, the inner surface plate of the heat insulating door is locally lowered by the collision of the cold airflow, and this cold heat is transmitted from the inner surface plate to the glass plate. At this time, since the thermal conductivity of the glass plate is lower than that of the steel plate, it is not possible to sufficiently raise the temperature in the region where the cold heat due to heat transfer from the surroundings is transmitted, and there is a problem that condensation occurs in the region. there were. As a result, the heat-insulating door is likely to be contaminated by the condensed water, so that the aesthetics of the refrigerator is lowered and the floor surface may be stained by the dripping of the condensed water.

  An object of this invention is to provide the refrigerator which can prevent dew condensation of the heat insulation door which arranged the glass plate.

  In order to achieve the above object, the present invention provides a refrigerator including a heat insulating door for opening and closing a storage room, wherein the heat insulating door includes a glass plate disposed on the front surface, and an inner surface plate of a resin molded product disposed on the back surface. And a foam heat insulating material filled between the glass plate and the inner surface plate, and a metal plate disposed between the glass plate and the foam heat insulating material.

  According to this configuration, the inner surface plate is in contact with cold air, and the front surface of the glass plate is in contact with outside air having a temperature higher than that of the cold air. The inner surface plate is locally lowered in temperature by the collision of the cold air current, and the region where the cold heat on the glass plate is transmitted is transferred from the surroundings by the metal plate in contact with the glass plate, and the temperature drop is suppressed.

  Further, in the refrigerator having the above-described configuration, it is preferable that the inner plate has door liners that protrude into the storage chamber at left and right end portions, and the metal plate is disposed between the left and right door liners. .

  In the refrigerator having the above-described configuration, it is preferable that the metal plate is disposed across two opposing sides of the heat insulating door.

  According to the present invention, in the refrigerator configured as described above, the metal plate is preferably made of a magnetic material.

  According to the present invention, the heat insulating door includes a glass plate disposed on the front surface, an inner surface plate of a resin molded product disposed on the rear surface, a foam heat insulating material filled between the glass plate and the inner surface plate, and a glass plate. And the foamed heat insulating material, the glass plate can be prevented from dew condensation.

The front view which shows the refrigerator of 1st Embodiment of this invention. Sectional drawing on the right side showing the refrigerator according to the first embodiment of the present invention. The front view which shows the heat insulation door of the refrigerator of 1st Embodiment of this invention. Sectional drawing along the AA line of FIG. Sectional drawing along the BB line of FIG. The enlarged view which expanded the V section of FIG. The enlarged view which expanded the W section of FIG. The front view which shows the heat insulation door of the refrigerator of 2nd Embodiment of this invention. Sectional drawing along the CC line of FIG. Sectional drawing along the DD line of FIG. Enlarged view of section X in Fig. 9 An enlarged view of the Y part in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a front view and a right side cross-sectional view of the refrigerator according to the first embodiment. The refrigerator 1 is provided with a refrigerator compartment 2 at the top, and below the refrigerator compartment 2, an ice making chamber 4 and a first freezer compartment 3 are arranged side by side. A second freezer compartment 5 is arranged below the ice making chamber 4 and the first freezer compartment 3, and a vegetable compartment 6 is arranged below the second freezer compartment 5. The refrigerator compartment 2, the first freezer compartment 3, the ice making compartment 4, the second freezer compartment 5, and the vegetable compartment 6 each constitute a storage compartment.

  The refrigerator compartment 2 is opened and closed by heat insulating doors 2a and 2b filled with a foam heat insulating material 25 (see FIG. 4) to store the stored items in a refrigerator. The heat insulating doors 2a and 2b rotate with the right end and the left end as fulcrums, respectively. Thereby, it can open to both sides by the middle of the refrigerator compartment 2.

  The first freezing room 3, the ice making room 4 and the second freezing room 5 are communicated and maintained below the freezing point. The 1st freezer compartment 3 and the 2nd freezer compartment 5 are opened and closed by drawer-type heat insulation doors 3a and 5a integral with a storage case (not shown), and preserves a stored thing frozen. The volume of the 2nd freezer compartment 5 is larger than the 1st freezer compartment 3, and can store a lot of stored goods frozen. The ice making chamber 4 is opened and closed by a rotating heat insulating door 4a, and ice is made and stored. The vegetable compartment 6 is opened and closed by a drawer-type heat insulating door 6a integral with a storage case (not shown), and the vegetables are stored at a higher room temperature (about 8 ° C.) than the refrigerator compartment 2.

  A cool air passage 31 partitioned by a back plate 5 b is provided behind the second freezer compartment 5. The cold air passage 31 communicates with a cold air passage 32 disposed behind the refrigerator compartment 2 via a refrigerator compartment damper (not shown). An evaporator 13 connected to the compressor 10 is disposed in the cold air passage 31. A freezer compartment blower 12 is disposed above the evaporator 13.

  A machine room 9 is provided behind the vegetable room 6, and a compressor 10 that operates a refrigeration cycle is disposed in the machine room 9. The refrigeration cycle is configured by connecting a compressor 10, a condenser (not shown), a capillary tube (not shown), an evaporator 13, and the compressor 10 in this order. The refrigerant is circulated by the operation of the refrigeration cycle, and the evaporator 13 is cooled. Then, the air flowing through the cold air passage 31 and the evaporator 13 exchange heat to generate cold air. The cold air generated by the evaporator 13 is sent out by driving the freezer blower 12.

  A defrost heater 11 is disposed below the evaporator 13. The evaporator 13 is defrosted by driving the defrost heater 11. The defrosted water generated by the defrosting is collected in an evaporating dish (not shown) arranged in the machine room 9.

  FIG. 3 shows a front view of the heat insulating door 2a. 4 and 5 show the AA sectional view and the BB sectional view of FIG. 6 and 7 show enlarged views in which the V portion in FIG. 4 and the W portion in FIG. 5 are enlarged. A glass plate 20 is disposed on the front surface of the heat insulating door 2a. The glass plate 20 covers the front surface of the heat insulating door 2a. The glass plate 20 is formed by subjecting soda-lime glass having a thickness of 3.2 mm to heat strengthening.

  A printed paint layer (not shown) is provided on the back surface of the glass plate 20. The glass plate 20 is made opaque by the printing paint layer and predetermined printing is performed. A protective film (not shown) is attached to the back surface of the printing paint layer. When the glass plate 20 is broken, the protective film prevents the glass pieces from scattering and prevents the printing paint layer from peeling off. The protective film is formed from a sheet made of vinyl chloride.

  An inner surface plate 21 of a resin molded product is arranged on the back surface of the heat insulating door 2a. The rear surface of the heat insulating door 2a is covered with the inner surface plate 21. Door liners 23 a and 23 b projecting into the refrigerator compartment 2 are formed at the left and right ends of the inner surface plate 21. A door pocket (not shown) is supported by the door liners 23a and 23b.

  Further, convex portions 28 a and 28 b projecting into the refrigerator compartment 2 are formed at the upper and lower end portions of the inner surface plate 21. The length of the convex portions 28a and 28b in the front-rear direction is shorter than that of the door liners 23a and 23b. The convex portions 28a and 28b are formed continuously with the door liners 23a and 23b. The distortion of the inner surface plate 21 is prevented by the convex portions 28a and 28b and the door liners 23a and 23b.

  An annular packing (not shown) is provided on the peripheral portion of the inner surface plate 21. The packing is made of a flexible resin or the like, and is attached with a protrusion (not shown) engaged with an engagement hole 27 provided in the inner surface plate 21. The packing is provided with a magnet (not shown), and the magnet closes the inside of the refrigerator compartment 2 by tightly adhering the packing to the periphery of the refrigerator compartment 2. In addition, the heat insulating door 2a which the inner surface board 21 which has elasticity without providing packing closely_contact | adheres to the circumference | surroundings of the refrigerator compartment 2 may be sufficient.

  The heat insulating door 2a has a frame member 24 made of a resin molded product. The frame member 24 covers the periphery of the heat insulating door 2a and locks the front surface of the glass plate 20. The frame member 24 includes an upper side member 24a, a right side member 24b, a lower side member 24c, and a left side member 24d. The left and right end portions of the upper side member 24a are fitted to the upper end portions of the left side member 24d and the right side member 24b, respectively, and the left and right end portions of the lower side member 24c are fitted to the lower end portions of the left side member 24d and the right side member 24b, respectively. Thereby, the upper side of the heat insulation door 2a, a right side, a lower side, and a left side are formed.

  The upper side member 24a, the right side member 24b, the lower side member 24c, and the left side member 24d are formed with locking portions 34a, 34b, 34c, and 34d that protrude from the front end portion toward the front center portion of the heat insulating door 2a. The locking portions 34a, 34b, 34c, and 34d lock the front surface of the glass plate 20. Thereby, the glass plate 20 can be reliably attached to the front surface of the heat insulation door 2a.

  The upper side member 24a, the right side member 24b, the lower side member 24c, and the left side member 24d are formed with support portions 44a, 44b, 44c, and 44d that protrude from the inside toward the center of the back surface of the glass plate 20, respectively. The support portions 44a, 44b, 44c and 44d are formed behind the locking portions 34a, 34b, 34c and 34d, respectively. The support portions 44a, 44b, 44c, and 44d support the back surface of the metal plate 26 described later. Thereby, the glass plate 20 and the metal plate 26 can be reliably attached to the heat insulation door 2a.

  A metal plate 26 is disposed on the back surface of the protective film adhered to the glass plate 20. Here, filling of the foam heat insulating material 25 will be described. The glass plate 20 and the metal plate 26 are attached to the frame member 24 and installed with the front side of the glass plate 20 facing downward, and the inner surface plate 21 is covered from above. A stock solution of foam heat insulating material 25 such as urethane foam is injected from an injection port (not shown) provided at a substantially central portion of the inner surface plate 21. The stock solution of the foam insulation 25 flows and grows in order from below. Thereby, the foam heat insulating material 25 is filled between the glass plate 20 and the inner surface plate 21. A metal plate 26 is disposed between the glass plate 20 and the foam heat insulating material 25.

  The metal plate 26 is formed from, for example, an iron plate having a thickness of 0.45 mm. Thereby, a magnet can be attached to the front surface of the glass plate 20. Therefore, the user can post a memo etc. on the front surface of the heat insulation door 2a using a magnet, and the convenience improves. As the magnet, a rare earth magnet such as a neodymium magnet or a ferrite magnet can be used.

  The metal plate 26 is formed in substantially the same size as the glass plate 20 when viewed from the front surface of the heat insulating door 2a, and covers the back side of the glass plate 20. The glass plate 20 and the metal plate 26 are sandwiched between the locking portions 34a, 34b, 34c, 34d and the support portions 44a, 44b, 44c, 44d. That is, the glass plate 20 and the metal plate 26 are sandwiched by the frame member 24. As a result, the heat insulating door 2 a is reinforced by the metal plate 26. Therefore, the strength of the heat insulating door 2a can be improved.

  In addition, since the back surface of the metal plate 26 is supported by the foam heat insulating material 25, the support portions 44a, 44b, 44c, and 44d may be omitted. Moreover, since the metal plate 26 covering the entire surface of the glass plate 20 is disposed across two opposing sides of the heat insulating door 2a, the heat insulating door 2a can be reinforced. The metal plate 26 may straddle one opposite two sides and be separated from the other two opposite sides. In this case, the metal plate 26 can be formed smaller than the glass plate 20 when viewed from the front surface of the heat insulating door 2a.

  Since the metal plate 26 covers the entire surface of the glass plate 20, the foam heat insulating material 25 does not adhere to the glass plate 20. Thereby, even if the foam heat insulating material 25 contracts, the glass plate 20 can be prevented from following and distorting.

  In the refrigerator 1 configured as described above, the cold air generated by the evaporator 13 is sent to the ice making chamber 4, the first freezing chamber 3, and the second freezing chamber 5 through the cold air passage 31 by driving the freezer compartment fan 12. The cold air flows through the ice making chamber 4, the first freezing chamber 3 and the second freezing chamber 5, and returns to the lower side of the evaporator 13 through a return port (not shown). Thereby, the ice making room 4, the 1st freezer room 3, and the 2nd freezer room 5 are cooled, and a stored item and ice are preserve | saved frozen.

  Due to the opening of the cold room damper (not shown), a part of the cold air flowing through the cold air passage 31 is guided to the cold air passage 32 and sent out to the cold room 2 through the cold air discharge port (not shown). Thereby, the refrigerator compartment 2 is cooled and the stored item is stored in a refrigerator. Further, the amount of cold air flowing into the refrigerator compartment 2 is adjusted by opening / closing the refrigerator compartment damper and on / off control of the compressor 10. Thereby, the temperature in the refrigerator compartment 2 is maintained at about 1 degreeC-5 degreeC, for example. The cold air flowing through the refrigerator compartment 2 flows through a communication path (not shown) and flows into the vegetable compartment 6, where the vegetables are stored cold. Then, it returns below the evaporator 13 via a return path (not shown).

  In the heat insulating door 2 a, the inner surface plate 21 is locally lowered in temperature by the collision of the cold airflow, and this cold heat is transmitted from the inner surface plate 21 to the glass plate 20. On the other hand, the front surface of the glass plate 20 is in contact with outside air having a temperature higher than that of cold air. At this time, since the metal plate 26 has a higher thermal conductivity than the glass plate 20, the region where the cold heat on the glass plate 20 is transmitted is transferred from the surroundings by the metal plate 26 in contact with the glass plate 20 to suppress the temperature drop. Is done. Therefore, condensation of the glass plate 20 can be prevented. As a result, it is possible to prevent dirt from adhering to the heat insulating door 2a due to condensed water and improve the aesthetics of the refrigerator. Further, it is possible to prevent the floor surface from being soiled due to dripping of condensed water.

  According to the present embodiment, the heat insulating door 2a is foam filled between the glass plate 20 disposed on the front surface, the inner surface plate 21 of the resin molded product disposed on the rear surface, and the glass plate 20 and the inner surface plate 21. Since the heat insulating material 25 and the metal plate 26 disposed between the glass plate 20 and the foam heat insulating material 25 are included, dew condensation on the front surface of the glass plate 20 can be prevented.

  Moreover, since the metal plate 26 is arrange | positioned ranging over the two sides which the heat insulation door 2a opposes, the intensity | strength of the heat insulation door 2a can be improved.

  Further, since the metal plate 26 is formed from an iron plate (magnetic material), a magnet can be attached to the front surface of the glass plate 20. Therefore, the user can post a memo etc. on the front surface of the heat insulation door 2a using a magnet, and the convenience improves.

  Next, a second embodiment will be described. This embodiment is different from the first embodiment in the size and location of the metal plate 26 as viewed from the front surface of the heat insulating door 2a. Other parts are the same as those in the first embodiment. FIG. 8 shows a front view of the heat insulating door 2a. 9 and 10 show a CC cross-sectional view and a DD cross-sectional view of FIG. 11 and 12 show enlarged views in which the X part in FIG. 9 and the Y part in FIG. 10 are enlarged. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

  In FIG. 8, the broken line M indicates the outer shape of the metal plate 26. The metal plate 26 is formed smaller than the glass plate 20 when viewed from the front surface of the heat insulating door 2a. The metal plate 26 is disposed facing the left and right door liners 23a and 23b, and is disposed facing the upper and lower convex portions 28a and 28b. Thereby, since the edge part of the metal plate 26 leaves | separates from the frame member 24, the metal plate 26 is affixed on the back surface of the glass plate 20 with an adhesive tape (not shown).

  In the left and right door liners 23a, 23b, the thickness of the foam heat insulating material 25 in the front-rear direction is larger than that between the left and right door liners 23a, 23b. For this reason, it is difficult for cold air to be transmitted to portions of the glass plate 20 facing the door liners 23a and 23b. Therefore, there is little risk of condensation on the front surface of the glass plate 20 without arranging the metal plate 26 in the portion facing the door liners 23a, 23b, and there is no major problem.

  In addition, the thickness of the foam heat insulating material 25 in the front-rear direction is larger at the upper and lower convex portions 28a and 28b than between the upper and lower convex portions 28a and 28b. Therefore, it is difficult for cold air to be transmitted to the portions of the glass plate 20 facing the upper and lower convex portions 28a and 28b. Therefore, there is little risk of condensation on the front surface of the glass plate 20 without arranging the metal plate 26 in the portion facing the convex portions 28a, 28b, and there is no major trouble. In the upper and lower convex portions 28a and 28b, the thickness of the foam heat insulating material 25 in the front-rear direction is smaller than that of the left and right door liners 23a and 23b.

  In the present embodiment, the size of the metal plate 26 is smaller than that of the glass plate 20 as viewed from the front surface of the heat insulating door 2a, but the contact between the glass plate 20 and the foamed heat insulating material 25 compared to the case where the metal plate 26 is not provided. The area is reduced. Therefore, even if the foam heat insulating material 25 contracts, the glass plate 20 can be reduced from following and distorting.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, since the magnitude | size of the metal plate 26 can be made smaller than 1st Embodiment seeing from the front surface of the heat insulation door 2a, the manufacturing cost of the refrigerator 1 can be suppressed and weight reduction of the heat insulation door 2a can also be achieved.

  In the first and second embodiments, the heat insulating door 2a of the refrigerator compartment 2 has been described as an example, but the other heat insulating doors 2b, 3a, 4a, 5a, and 6a may be configured similarly to the heat insulating door 2a.

  The metal plate 26 may be formed of other magnetic materials, for example, martensitic stainless steel. The metal plate 26 may be formed of nonmagnetic aluminum, austenitic stainless steel, or the like.

  According to this invention, it can utilize for the refrigerator which opens and closes a storage chamber with a heat insulation door.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 2a, 2b, 3a, 4a, 5a, 6a Thermal insulation door 3 1st freezing room 4 Ice making room 5 2nd freezing room 6 Vegetable room 9 Machine room 10 Compressor 11 Defrost heater 12 Freezing room blower 13 Evaporation Container 20 Glass plate 21 Inner surface plate 23a, 23b Door liner 24 Frame member
24a Upper side member 24b Right side member 24c Lower side member 24d Left side member 25 Foam heat insulating material 26 Metal plate 28a, 28b Protruding portion 31, 32 Cold air passage 34a, 34b, 34c, 34d Locking portion 44a, 44b, 44c, 44d Support portion

Claims (4)

In the refrigerator with a heat insulating door that opens and closes the storage room,
The heat insulating door has a glass plate disposed on the front surface, an inner surface plate of a resin molded product disposed on the rear surface, a foam heat insulating material filled between the glass plate and the inner surface plate, and the glass plate. A refrigerator comprising a metal plate disposed between the foam insulation.   2. The refrigerator according to claim 1, wherein the inner surface plate has door liners projecting into the storage chamber at left and right end portions, and the metal plate is disposed facing the left and right door liners. .   The refrigerator according to claim 1 or 2, wherein the metal plate is disposed across two opposite sides of the heat insulating door.   The refrigerator according to any one of claims 1 to 3, wherein the metal plate is made of a magnetic material.

Images