JP4488966B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator having a refrigerated storage space and a refrigerated storage space and provided with a cooler for cooling them and a cold air circulation fan.

  As shown in the longitudinal sectional view of FIG. 8 in recent years, a refrigerator room (55) having the highest frequency of use and a large volume is disposed at the top, and a refrigerator space similar to the refrigerator room (55) is provided below the refrigerator. There are many types that have a vegetable room (58) for storing vegetables, an ice making room (56) and a temperature switching room (not shown) at the bottom, and a freezer room (59) at the bottom. It has become.

  A refrigeration cooler (63) and a fan (65) for cooling the refrigeration space are arranged on the back of the refrigeration room (55), and the ice making room (at the position corresponding to the back of the vegetable room (58) below) 56) and a freezer cooler (64) and a fan (66) for cooling the freezing space such as the freezer compartment (59), and a refrigerant from the compressor (82) provided in the machine room at the bottom of the main body Are alternately introduced into the refrigeration and refrigeration coolers (63) and (64) by a switching valve, and the generated cool air is cooled to a predetermined temperature by the fans (65) and (66). It was circulating.

The refrigeration and refrigeration coolers (63) and (64) are cooled to a low temperature of around -13 ° C and -30 ° C, respectively. In order to increase the volumetric efficiency, a vacuum insulation panel (70) having a predetermined thickness as shown in Patent Document 1 is usually placed in a heat insulation wall (54) made of a foam insulation material such as urethane foam to increase the heat insulation performance. Was.
JP-A-2005-69448

  However, the vacuum insulation panel (70) is very expensive compared to the foam insulation (54). Like the conventional refrigerator, the refrigeration cooler (63) and the freezing cooler (64) To cover both coolers (63) and (64) when they are placed on the back of the refrigerator compartment (55) at the top of the body and the back of the vegetable compartment (58) at the bottom, respectively. However, there is a problem that the vacuum heat insulation panel (70) has to be arranged so as to extend over at least the entire back surface, which increases the size and the manufacturing cost. Moreover, when it arrange | positions separately on the upper and lower sides, since a vacuum heat insulation panel becomes 2 parts and becomes more expensive, and a complicated manufacturing assembly man-hour increases, it was unavoidable that it becomes high cost similarly to the above. .

  On the other hand, as shown in FIG. 9, since the lower temperature freezing cooler (64) is arranged at the back of the vegetable room (58) having a high set temperature, it is caused by a large temperature difference between the two. In order not to be affected by temperature due to heat leakage, a thick front cover (68) is provided on the indoor side, and the heat insulation thickness increases with the heat insulation wall (54) on the outdoor side. There was a drawback that the storage volume in the compartment was reduced.

  The present invention has been made in consideration of the above circumstances, and by arranging the refrigeration and refrigeration coolers in accordance with the positions of the refrigeration or refrigeration storage space and the heat insulation wall, an effective reduction in the heat insulation thickness can be achieved. It is an object of the present invention to provide a refrigerator that can increase the volume of the storage space inside the scale.

The present invention for solving the above problems is the refrigerator provided in a refrigeration storage space and cold storage refrigeration for cooling a space dedicated respectively and refrigerating cooler and the cooling space and a fan for circulating cold air, the refrigerating The evaporating temperature of the refrigeration cooler is set higher than the evaporating temperature of the refrigeration cooler, and the refrigeration and refrigeration coolers provided at the back of the storage space are placed close to each other so that at least a part thereof overlaps in the front-rear direction. A cooler that is arranged and set to an evaporating temperature with a small temperature difference between the storage space located in front of the refrigeration and refrigeration coolers is located on the front storage space side, and the temperature difference between the storage space and the storage space. A cooler set to a large evaporation temperature is arranged at the rear.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the thickness of the heat insulation layer of the storage chamber inside or a main body, and can expand the volume of the division inner side storage space.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a refrigerator, and FIG. 2 is a front view thereof. The refrigerator is composed of an outer box (2), an inner box (3), and a heat insulating material (4) filled in a space between these inner and outer boxes. The refrigerator body (1) formed of a heat-insulated box body is used as a storage space with the refrigerator compartment (5) at the top, and the ice-making room (6) equipped with an automatic ice maker below the insulation partition wall (10). And a temperature switching chamber (7), and a vegetable room (8) below them and a freezer room (9) at the bottom are independently arranged. A heat insulating partition wall (10) is also provided between the vegetable compartment (8) and the freezer compartment (9), and a dedicated door is provided at the front opening of each storage compartment so as to be freely opened and closed. .

  The refrigeration cooler (13) for cooling the refrigerated storage space (11) of the refrigerator compartment (5) and the vegetable compartment (8) is placed on the back of the vegetable compartment (8) located below the center of the main body. And a freezing cooler (14) for cooling a freezing storage space (12) such as the ice making room (6), temperature switching room (7), freezing room (9), etc. They are provided together and are slightly shifted from side to side.

  As shown in FIG. 3, each of the storage chambers includes a compressor (22), a condenser (23), and a refrigerant flow switching device installed in a machine chamber (20) formed on the lower back surface of the main body. (24) to form a circuit for connecting the first expansion device (25) and the refrigeration cooler (13) on the high temperature side in series to return to the compressor (22), and the three-way valve ( 24) to the refrigerating side circuit comprising the first throttling device (25) and the high temperature side cooler (13), the second throttling device (26) and the low temperature side freezing cooler (14), It is cooled by a refrigeration cycle (21) connected to a refrigeration side circuit in which an accumulator (27) and a check valve (28) are connected in order.

  The three-way valve (24) causes the first throttling device (25) and the refrigeration cooler (13) to be detected by a temperature detected by a temperature sensor (not shown) provided in the refrigerator compartment (5), the freezer compartment (8), and the like. The flow path is switched alternately to the refrigeration side circuit consisting of or the refrigeration side circuit consisting of the second expansion device (26) and the refrigeration cooler (14), accumulator (27), and check valve (28) The refrigerator is supplied with a refrigerant for cooling, and the refrigerator (13) and the refrigerator (14) disposed in the vicinity of the refrigerator (14) are rotated by the fans (15) and (16), respectively. (5) The refrigerated storage space (11) of the vegetable room (8), and the frozen storage space (12) such as the freezing room (9) and ice making room (6) on the low temperature side are independently cooled to a predetermined temperature. I have control.

  Each of the coolers (13) and (14) is dedicated for use in a refrigerated storage space and a refrigerated storage space, and is -13 ° C for refrigeration and -30 ° C for refrigeration. By setting the evaporation temperature as close as possible to the storage space temperature, the refrigeration cycle efficiency is kept high and power saving operation is performed.

  Specifically, as shown in the perspective view of FIG. 4, the refrigeration cooler (13) on the high temperature side is on the front vegetable room (8) side, and the refrigeration cooler (14) on the low temperature side is on the rear side. These refrigeration and refrigeration coolers (13) and (14) are juxtaposed in front and back with an insulating cover (17) formed of molded heat insulating material such as polystyrene foam, and are independent of each other. The front face of the front refrigeration cooler (13) is covered with a front cover (18) having a relatively small heat insulation thickness and integrated as a cooler unit (19). When the temperature difference between the refrigeration cooler (13) and the storage room, for example, the vegetable room (8) is very small, the front cover is not a cover body made of a so-called heat insulator, but a synthetic resin panel board. You may form with the sheet board of.

  Above each cooler (13) (14), fans (15) (16), bellmouths and the like for blowing and circulating the cool air generated by the cooler in each storage space are installed. The unit integrated with the storage unit (19) is arranged inside the back heat insulation wall (4) of the main body, and the front surface is covered with an evaporative cover (30). Is supplied to the storage spaces (11) and (12), and each is cooled to a predetermined temperature.

  At this time, the cool air discharged from the fan (16) is moved up and down on the insulating cover (17) disposed between the refrigeration cooler (14) located in the rear and the front refrigeration cooler (13). To the upper ice making chamber (6), the temperature switching chamber (7) and the lower freezing chamber (9), a discharge duct (31) is formed. In addition, the space formed on one side (left side in FIG. 2) of the refrigeration cooler (13) located in front is a return from the ice making chamber (6) and the temperature switching chamber (7) to the cooler (14). Return duct (32) from the duct or freezer compartment (9), or return duct (33) to return the chilled air that has circulated from the refrigerator compartment (5) to the vegetable compartment (8) and returned to the refrigerator (13) A fan (15) is disposed above the refrigeration cooler (13) and is connected to a cold air blowing duct (34) formed on the back of the refrigeration chamber (5).

  Then, the cold air discharged by the fan (16) from the refrigeration cooler (14) is divided upward from the lowermost freezing chamber (9) by the discharge duct (30), and one of the cold air blown upward is The ice flows into the ice making chamber (6) to promote ice making, and one of them flows into the temperature switching chamber (7) via the damper (35), and cools the room to a predetermined set temperature. The cold air circulated through the chamber is returned to the cooler (14) via the return duct (32).

  The cold air generated by the refrigeration cooler (13) is discharged by the fan (15) into the upper blowing duct (34), and the cold air outlet (36) drilled up and down in the duct (34) From inside the refrigerator compartment (5) to cool the stored items, and is introduced into the vegetable compartment (8) through the duct from the lower suction port, and after cooling this, return to the cooler (13) Circulate.

  With the above configuration, as shown in FIG. 5 which is a schematic longitudinal sectional view of the cooler-arranged portion, the front refrigeration cooler (13) with a high evaporation temperature and the indoor room of the vegetable room (8) Since there is only a slight temperature difference between the temperature, the heat insulation thickness A, which is the thickness of the front cover (18), which is a heat insulation partition wall to prevent dew condensation and icing, is shown in the conventional diagram of the same part. As is clear from comparison with FIG. 9, it can be made much thinner than in the case of a conventional freezer cooler and a vegetable room. Specifically, conventionally, 70 mm is required as a in FIG. Therefore, the heat insulation thickness A may be 10 mm.

  In this case, in the configuration of the present invention, a new insulating partition wall (17) is provided between the two coolers because the refrigeration and the refrigeration coolers (13) and (14) are provided so as to overlap each other. A heat insulation thickness B (25 mm) is required, but on the other hand, a heat insulation thickness d (equivalent to the heat insulation thickness a provided between the refrigerator (63) and the conventional refrigerator is provided on the back of the refrigerator compartment (5). 10 mm) is not required, so that the heat insulation thickness D is basically 0, and the heat insulation thickness E with the outside air at the back of the refrigerator compartment (5) is also free from the refrigeration cooler (13). Therefore, the heat insulation performance can be reduced and the thickness is reduced by 10 mm to 40 mm.

  Further, the heat insulation thickness C on the back side of the refrigeration and freezing coolers (13) and (14) on the back of the main body is the same as that in the conventional case and is 70 mm. The heat insulation thickness of about 55 mm can be reduced as compared with the above, and the internal volume can be increased by about 22 L compared to the conventional case where the same condition is maintained in a state where the outer size is maintained.

  Next, another embodiment of the present invention will be described. In the embodiment, the coolers (13) and (14) juxtaposed in the front and rear are arranged on the back of the vegetable compartment (8). However, in the present embodiment, as shown in FIG. Is placed on the back of the freezer compartment (9), a freezer cooler (14) is installed on the front side of the freezer compartment via a front cover (18 '), and an insulating cover (17 ) Is provided with a refrigeration cooler (13).

  In this case, the heat insulation thickness B ′ (25 mm), which is the insulating partition wall (17) between the freezing and refrigeration coolers (14) and (13) provided at the front and rear, is the same as that of the above embodiment, and the front side The cooler is a freezer cooler (14) with a low evaporation temperature, but the indoor side corresponding to this is a freezer room (9) cooled to -18 ° C. or lower. As in the embodiment, since there is a relatively low temperature range, the heat insulation thickness A ′ of the front cover (18 ′) that blocks heat leakage can be set to 10 mm as in the previous embodiment. The heat insulation thickness a in the case of a vegetable room can be significantly reduced.

  In the case of the present embodiment, the rear cooler is a refrigeration cooler (13), and since the temperature difference from the outside air temperature is smaller than that of the freezer cooler, the heat insulation thickness C ′ is reduced. It is possible to obtain heat insulation performance with 50 mm, which is 20 mm less than the above-mentioned examples and conventional examples, and in total reduction amount, the heat insulation thickness is 75 mm most with respect to the conventional configuration shown in FIG. It can be greatly reduced, and the internal volume can be increased by about 27 L compared to the conventional configuration under the same conditions.

  Moreover, as shown in FIG. 7, the refrigerators for freezing and refrigeration arrange | positioned in the back part of the vegetable compartment (8) are the refrigeration cooler (14) in the front part of the indoor side, and the refrigeration cooler (13 ), The front cover (18 ″), which is a heat insulating partition for this part, is low because the evaporation temperature of the freezer cooler (14) adjacent to the vegetable room (8) with a high set room temperature is low. The heat insulation thickness A ″ of 70 mm is the same as the conventional thickness, and even if the heat insulation thickness B ″ for insulation between the two coolers is 25 mm as described above, the rear cooler is a refrigeration cooler (13 ), The heat insulation thickness C ″ from the outside air may be 50 mm.

  Further, as in each of the above-described embodiments, the heat insulation thickness d (10 mm) provided between the back surface of the conventional refrigerator (55) and the refrigerator for refrigeration (63) is not required, and the refrigerator compartment (5) side is not required. Since the refrigeration cooler (13) does not exist at that location, the heat insulation thickness E ″ on the back surface of the glass can be reduced by reducing the thickness by 10 mm to 40 mm. The thickness can be reduced by 15 mm, and the internal volume increases by about 10 L.

  According to the configuration of each of the above embodiments, the refrigerator for refrigeration and the refrigerator for freezing (13) and (14) are juxtaposed in front and rear corresponding to the back of the storage chamber, and the storage corresponding to the cooler located on the front side. By arranging the chambers in a small temperature difference relationship, the storage chamber and each cooler for refrigeration and freezing can be optimally insulated, reducing the thickness of the heat insulation layer inside the storage chamber and outside the body The volume of the storage space in the warehouse can be increased, and the cooler area corresponding to the vertical length of the main body heat insulating wall (4) is reduced. Even when a panel is used, the size of the panel can be minimized, and the panel can be effectively provided with a reduced material cost.

  Further, by integrating the refrigeration and refrigeration coolers (13) and (14) into a unit, assembly work and transportation are facilitated, and productivity and service work can be made efficient. In addition, an insulating cover member that forms a duct made of molded heat insulating material such as polystyrene foam is integrated with a freezing and refrigeration fan (15) (16) and a damper (34) that controls the cold air flow to each storage room. The unit is integrated into a unit, and the unit (19) of the refrigeration and refrigeration coolers is integrated to obtain a space-saving effect by integrating the arrangement of components.

  In the above embodiment, the storage room has a refrigerator compartment (5) at the top, followed by an ice making room (6) and a temperature switching room (7), and a vegetable room (8) at the bottom. Although arrange | positioned like the freezer compartment (9) in the lowest part, this invention is not limited to this.

  INDUSTRIAL APPLICABILITY The present invention can be used for a refrigerator provided with a cooler that cools a frozen storage space and a refrigerated storage space and a cold air circulation fan.

It is a longitudinal cross-sectional view of the refrigerator which shows one Embodiment of this invention. It is a front view of the refrigerator of FIG. It is the schematic which shows the refrigerating cycle of the refrigerator in FIG. It is a disassembled perspective view which shows the unit structure of the cooler and fan in FIG. It is sectional drawing which shows the relationship between the refrigerator for freezing and refrigeration of FIG. 1, and heat insulation thickness. It is sectional drawing of the same part as FIG. 5 which shows the other Example of this invention. It is sectional drawing of the same part as FIG. 5 which shows other Example of this invention. It is a longitudinal cross-sectional view which shows the conventional refrigerator structure. It is sectional drawing of the same part as FIG. 5 which shows the conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Outer box 4 Insulation wall 5 Refrigeration room 6 Ice making room 7 Temperature switching room 8 Vegetable room 9 Freezing room 10 Insulation partition wall
11 Refrigerated storage space 12 Refrigerated storage space 13 Refrigerated cooler
14 Refrigeration cooler 15, 16 Fan 17 Insulation cover
18 Front cover 19 Cooler unit 20 Machine room
21 Refrigeration cycle 22 Compressor 30 Eva cover
31 Discharge duct 32, 33 Return duct 34 Outlet duct
35 Damper 36 Cold air outlet 38 Communication duct
39 Suction port

Claims (6)

In a refrigerator provided with a refrigeration and refrigeration cooler that cools the refrigerated storage space and the refrigerated storage space, respectively, and a fan that circulates cold air to each cooling space,
The evaporating temperature of the refrigerating cooler is set higher than the evaporating temperature of the refrigerating cooler, and the refrigerating and refrigerating coolers provided at the back of the storage space are close to each other so that at least a part thereof overlaps in the front-rear direction. Arranged,
The cooler set to the evaporating temperature with a small temperature difference between the storage space located in front of the refrigeration and refrigeration coolers is evaporating with a large temperature difference between the storage temperature and the front storage space. A refrigerator characterized in that a cooler set to a temperature is arranged rearward.   2. The refrigerator according to claim 1, wherein a refrigerator for freezing and a refrigerator for refrigerating are provided at the back of the refrigerating storage space, and the refrigerating cooler is disposed on the front storage space side and the refrigerating cooler is disposed rearward. . 3. A refrigerator according to claim 2 , wherein a drawer door type vegetable room is provided together with a refrigerating room that opens and closes a front opening by a rotary door, and a refrigerator for freezing and a refrigerator for freezing are provided at the back of the vegetable room.   2. The refrigerator according to claim 1, wherein a refrigerator for freezing and a refrigerator for refrigeration are provided at the back of the frozen storage space, and the refrigerator for freezing is disposed on the front storage space side, and the refrigerator for refrigeration is disposed rearward. . With unitized integrally with freezing and refrigerating cooler, according to claim 1, characterized in that a unit together with the damper to control the cold air flow to the freezing and refrigerating fans and storage rooms The refrigerator according to any one of 4 . The refrigerator for freezing and refrigeration, the fan for freezing and refrigeration, and the damper which controls the cold airflow to each storage room were unitized integrally, The any one of Claims 1-4 characterized by the above-mentioned. the refrigerator according to.

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