JP2007064553A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator where the refrigeration cycle parts of a compressor and a condenser are disposed separately in upper and lower portions to allow efficient cooling so as to make machine rooms compact and increase the storage capacity of a storage compartment. <P>SOLUTION: An upper machine room 62 and a lower machine room 82 are provided respectively at the top and bottom of the back of an insulating casing 50. The compressor 63 is disposed in the upper machine room 62 at the top and the condenser 83 is disposed in the lower machine room 82 at the bottom. The upper machine room 62 and the lower machine room 82 have respective fans disposed therein whereby the parts of a refrigeration cycle can be cooled efficiently and rationally. In this way, the upper machine room 62 and the lower machine room 82 can be formed to have small capacities to increase the storage capacity of the storage compartment while also enhancing storability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerator that makes effective use of the internal volume of a storage room by arranging the refrigeration cycle such as a compressor, a condenser, and an evaporator.

  In recent years, refrigerators are required to be further energy-saving from the viewpoint of protecting the global environment, and to be improved in usability and storage.

  A conventional refrigerator of this type is generally configured such that a machine room is formed in the rear rear region of the storage room disposed at the lowermost part, and a compressor for a refrigeration cycle is accommodated in the machine room. In such a configuration, the storage space of the lowermost storage chamber is invaded in the machine room and the storage volume is reduced, and the space shape of the storage space is also stored in a complicated shape excluding the protruding part of the machine room. It was not good.

  For the purpose of solving such problems related to conventional storage properties, as shown in Patent Document 1, a machine room is provided which is recessed so that the upper back of the uppermost storage chamber of the heat insulation box is lowered. A refrigerator has been proposed in which high-pressure components such as a compressor of a refrigeration cycle are stored in the machine room. FIG. 7 shows a cross-sectional view of a conventional refrigerator described in Patent Document 1. In FIG.

  As shown in FIG. 7, the heat insulating box 1 has a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 in order from the top, and a refrigerator compartment rotary door 5 is provided at the front opening of the refrigerator compartment 2. In addition, the freezer compartment 3 and the vegetable compartment 4 located in the lower part from the center of the heat insulating box 1 are provided with a drawer type freezer compartment drawer door 6 and a vegetable compartment drawer door 7 that can be easily taken out in consideration of storability and convenience. Is provided. A plurality of storage shelves 8 are provided in the refrigerator compartment 2, and storage containers 9 a and 9 b having an open top shape are attached to the freezer compartment 3 and the vegetable compartment 4. The storage containers 9a and 9b are supported on rails (not shown) in the front-rear direction so as to be movable in the front-rear direction by rollers.

  The machine room 10 provided in the heat insulation box is a place where the top rear part over the outer box upper surface 11 and the outer box rear surface 12 is recessed so that the uppermost rear part of the refrigerator compartment 2 is lowered. The left and right sides of the machine room 10 are closed by the left and right walls of the heat insulation box 1 and open upward and to the back. The open part of the machine room 10 is substantially perpendicular to the upper plate 13 cover 15 and the upper plate 13 cover 15. A machine room cover 15 including the back plate 14 is covered. The machine room cover 15 is detachably fixed to the heat insulating box 1 with screws or the like.

  The compressor 16 and the condenser 17, which are components of the refrigeration cycle, are arranged so as to be accommodated in the machine room 10 together with the machine room fan 18, and are covered with a machine room cover 15 constituted by an upper plate 13 and a back plate 14. Yes.

  The evaporator 20 which is a component of the refrigeration cycle is disposed with a cooling fan 21 at the back of the freezer compartment 3 which is the middle stage of the heat insulating box 1, and the vegetable compartment 4 which is the lowermost storage room has a depth. Deeply structured.

Thereby, compared with what stores the compressor 16 and the condenser 17 in the back lower part of the heat insulation box 1, the internal volume of the vegetable compartment 4 which is the lowest storage room can be comprised deeply, and it can comprise. The space shape does not become a complicated shape due to an invalid space such as the compressor 16 and can improve the storage property.
JP 2001-99552 A

  However, in the above-described conventional configuration, the compressor 16 and the condenser 17 are arranged on the top surface of the heat insulating box 1, so that the necessary storage capacity of the machine room 10 is increased and the machine room 10 to the uppermost storage room is increased. The protrusion margin is further increased. Moreover, although the internal volume and depth of the vegetable room 4 which is the lowest storage room can be enlarged and the storage property can be improved, the cooling in which the evaporator 20 and the cooling fan 21 are disposed only in the rear part of the freezing room 3. Since it has a chamber, the depth of the freezing chamber 3 formed in front of the cooling chamber is reduced, and the depth of the vegetable chamber 4 adjacent to the lower portion is considerably different.

  For this reason, the shape of the machine room 10 at the position of the line of sight when the refrigerating room rotary door 5 is opened is easily noticeable, giving the user a sense of incongruity and reducing the storage space.

  Moreover, since the freezer compartment 3 has a small depth, it is less convenient than the vegetable compartment 4 and gives a narrow impression. In particular, considering the current social environment, the number of double-income households is increasing, so that the needs for freezer rooms are increasing today. It is important to enhance the storage capacity and storage capacity of freezer rooms.

  As described above, in the above-described conventional configuration, even if the compressor 16 is removed from the region of the lowermost storage chamber and the storage volume and storage performance are increased, the arrangement of the condenser 17 and the evaporator 20 is still devised. Therefore, the machine room 10 provided on the top surface of the heat insulation box 1 needs a large capacity for installing the compressor 16 and the condenser 17, and the storage around the upper stage of the refrigerating room 2 which is the uppermost storage room. Sexuality gets worse. Furthermore, if the protrusion of the machine room 10 to the refrigerating room 2 is increased, there is a problem that the user is given a feeling of pressure when the door is opened and the design is also deteriorated.

  The present invention solves the above-mentioned conventional problems, and a compressor is installed on the upper back of the uppermost storage chamber, and refrigeration cycle parts such as a condenser and functional parts are separated on the rear of the lowermost storage chamber. An object of the present invention is to provide a refrigerator having a storage configuration and a storage capacity that are further improved.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is provided with machine rooms that can accommodate parts necessary for the refrigeration cycle at the top rear portion and the bottom rear portion of the heat insulation box, and at least the compressor is It is placed in the upper machine room that is lowered one step behind the top surface of the heat insulation box, and is used for air circulation in the machine room in both the upper machine room behind the top surface of the heat insulation box and the lower machine room behind the bottom. A fan is provided.

  As a result, the refrigeration cycle parts are separately arranged in the upper machine room and the lower machine room, and the fans for cooling the respective machine rooms are provided, so that the parts required for the refrigeration cycle in the machine room can be reduced in size, and as a result Moreover, since the volume of the machine room can be reduced, the food storage space can be increased.

  Also, by providing covers in the upper machine room and lower machine room, and providing openings in each cover, the air in the machine room can be circulated and exhausted efficiently to the outside, so that the refrigeration cycle in the machine room Necessary parts can be reduced in size, and the food storage space can be increased. As a result, the volume of the machine room can be reduced and the storage room can be expanded to improve usability.

  The refrigerator of the present invention has a compressor installed in the machine room at the back of the uppermost storage room, and stores the refrigeration cycle parts such as a condenser and functional parts separately in the machine room at the back of the lowermost storage room. Therefore, by disposing the fans in the upper and lower machine rooms, the volume of the upper and lower machine rooms can be divided into small parts, the storage capacity in the storage room can be increased, and the storage performance can be improved.

  The invention according to claim 1 is a heat insulating box formed of an outer box, an inner box, and a foam heat insulating material, an upper machine room formed by being recessed in a rear part of the top surface of the heat insulating box, and the heat insulating member. It consists of a lower machine room provided near the bottom of the box, with a compressor installed in the upper machine room and at least a condenser installed in the lower machine room, and both machine rooms equipped with a fan. In addition, parts necessary for the refrigeration cycle in the machine room can be reduced in size, and as a result, the volume of the machine room can be reduced, so that the food storage space can be increased.

  The invention according to claim 2 is the invention according to claim 1, further comprising an upper cover that covers the upper machine room and a lower cover that covers the lower machine room, and an air passage is provided in the machine room. As a result, the air volume of the fan is increased, and the parts in the machine room can be further miniaturized. As a result, the volume of the machine room can be reduced, so that the food storage space can be increased. Moreover, since it becomes possible to make a duct-like closed circuit in a lower machine room and the circulation effect of airflow is improved, the heat dissipation capability of a condenser can be improved.

  The invention according to claim 3 is the invention according to claim 2, wherein the upper cover and the lower cover are provided with openings, and the air circulation effect between the machine room and the outside of the refrigerator is enhanced. Since the parts in the machine room can be further reduced in size, and the volume of the machine room can be reduced as a result, the food storage space can be increased. Moreover, the circulation effect of the air outside a lower machine room and a refrigerator can be improved, and the heat dissipation capability of a condenser can be improved.

  According to a fourth aspect of the present invention, in the invention of the third aspect, the upper cover and the lower cover are provided with inclined portions toward the side walls of the heat insulating box, and the inclined portions are provided on the inclined portions. When the refrigerator is installed, a space can be formed between the opening and the wall on the back side, so that the air circulation effect between the machine room and the outside of the refrigerator is enhanced. Thus, parts in the machine room can be further reduced in size, and the volume of the machine room can be reduced as a result, so that the food storage space can be increased. Moreover, the circulation effect of the air outside a lower machine room and a refrigerator can be improved, and the heat dissipation capability of a condenser can be improved.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the fan is operated in synchronism with the compressor, and the compressor generates heat. The fan is operated during heat dissipation of the condenser and the air circulation effect in the upper and lower machine chambers can be enhanced, and the parts in the machine chamber can be further miniaturized, and as a result, the volume of the machine chamber can be reduced. Storage space can be increased.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the fan is operated with a temperature sensor in one or both of the upper machine room and the lower machine room. The operation of the fan is controlled by the detection signal of the temperature sensor, and the parts in the machine room can be further miniaturized by maintaining the state in the upper and lower machine rooms in an optimum state. Since the volume of the machine room can be reduced, the food storage space can be increased. Further, the operation of the fan is controlled by inputting a detection signal of the temperature sensor mechanism to a control board, so that the circulation effect of the air flow in the lower machine chamber can be optimally improved, and the heat dissipation capability of the condenser can be increased. It can be improved.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view of a heat insulating box with the refrigerator door opened according to the same embodiment, and FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is a perspective view of the main part of the rear part of the top surface of the heat insulation box of the refrigerator according to the embodiment. FIG. 5 is a cross-sectional view of the main part of the rear part of the bottom of the heat insulation box of the refrigerator according to the embodiment. 6 is an exploded perspective view of a main part of a rear portion of the bottom surface of the heat insulating box of the refrigerator in the same embodiment.

  In FIG. 1 to FIG. 6, a heat insulating box 50 configured to be insulated from the surroundings with a heat insulating material such as hard foamed urethane is divided into a plurality of sections to form a storage chamber, and the uppermost storage chamber The ice making chamber 52 and the ice making chamber 52 and the first freezing chamber 53, which are partitioned by an insulated partition wall, are arranged side by side immediately below the refrigerator compartment 51. The lowermost storage room is the second freezer room 54, and the vegetable room 55 is arranged immediately above the second freezer room 54 between the ice making room 52 and the first freezer room 53 and the second freezer room 54. It becomes the composition which is done. Both the second freezer compartment 54 and the vegetable compartment 55 are in the form of pull-out storage rooms. The front opening of each storage room has a rotary refrigerator door 51a, a drawer-type ice making door 52a, a first freezer door 53a, a second freezer door 54a, and a vegetable room door 55a, which are heat insulating doors. Is provided.

  The refrigerator compartment 51 is usually set at 1 ° C to 5 ° C with the lower limit of the temperature at which it is not frozen for refrigerated storage, and the vegetable compartment 55 is often set to 2 ° C to 7 ° C, which is the same or slightly higher temperature setting as the refrigerator compartment 51. The freshness of the leafy vegetables can be maintained for a long period of time as the temperature and humidity become lower. The first freezing room 53 and the second freezing room 54 which are storage rooms in the freezing temperature zone are set to about −18 ° C. sufficient for freezing and storing frozen foods. For example, the temperature may be set at a low temperature of about −30 ° C., for example.

  The top surface portion of the heat insulation box 50 is formed with a first top surface portion 60 and a second top surface portion 61 by providing a stepped recess in the rear direction, and this step-shaped upper machine chamber 62. The compressor 63, the piping 63a for circulating the refrigerant, and the components on the high pressure side of the refrigeration cycle such as a dryer (not shown) for removing moisture are housed, and the air in the upper machine chamber 62 is circulated and exhausted. A machine room fan 79 is also housed. In general, the step-like upper machine room 62 has a cutout portion for a space where the compressor 63 is placed on the first top surface portion 60 of the outer box 64 formed of a metal steel plate or the like that is the outer shell of the heat insulating box body 50. The upper machine chamber 62 is formed in such a manner that a resin part 66 formed integrally with the front wall, the left and right side walls, and the second top surface portion 61 for mounting the compressor 63 is fitted into the notch portion 65. Forming. The upper machine room 62 is open at the top and the back, and is covered with an upper machine room cover 62a. The upper machine room cover 62a is processed to be substantially L-shaped from the top surface part 60 to the back plate 64a and covers the entire upper machine room 62. Further, a temperature sensor mechanism 107 that detects the temperature in the upper machine chamber 62 may be disposed in the upper machine chamber 62.

  Note that vibration propagation can be prevented by installing an elastic body 67 such as rubber or resin in the middle of the fixing portion of the compressor 63 provided on the second top surface portion 61. The inner box 68 that forms the inside of the heat insulating box 50 is curved along the shape of the resin component 66 on the inner side of the refrigerator, and the inner box 68 protrudes to the inner side in the vicinity of the uppermost stage of the refrigerator compartment 51. ing. Further, a foam heat insulating material 69 is injected between the outer box 64 and the inner box 68 to insulate the refrigerator compartment 51 and the upper machine room 62 from each other. In order to improve the strength of the upper machine chamber 62 in which the compressor 63 is placed by inserting a notch 65 into the first top surface 60 of the outer box 64, a reinforcing member (not shown) is generally provided around the notch 65. It is desirable to reinforce it. Therefore, the compressor 63 is not disposed in the rear region of the lowermost storage chamber of the heat insulating box 50 that has been generally used conventionally.

  In addition, a cooling chamber 70 is provided across the back surfaces of both the second freezing chamber 54 and the vegetable chamber 55, and a fin-and-tube evaporator 76 is representatively provided in the cooling chamber 70. The second freezer compartment 54 and the vegetable compartment 55 including the rear area of the partition wall 71 are vertically arranged in the vertical direction, and the arrangement ratio of the second freezer compartment 54 area is that of the vegetable compartment 55. It arrange | positions so that it may become larger than the arrangement | positioning ratio of an area | region. In the upper space of the evaporator 76, a cooling fan 77 that blows the cold air cooled by the evaporator 76 is disposed in order to send the cold air to each storage chamber by a forced convection method, and for the cold room for sending the cold air to the cold room 51. An air duct (not shown), an ice making chamber 52, an ice making chamber air passage (not shown) for sending cold air to the first freezing chamber 53, and a freezer compartment for sending cold air to the second freezing chamber 54 An air passage (not shown) is provided. In the lower space of the evaporator 76, a radiant heater 78 made of a glass tube is provided as a defrosting device for melting frost and ice adhering to the evaporator 76 and the cooling fan 77 during cooling.

  The bottom rear of the heat insulation box 50 is provided with a dent that is raised by one step in the back direction, and a lower machine chamber 82 configured in a stepped manner by the first bottom surface portion 80 and the second bottom surface portion 81 is provided. . The lower machine chamber 82 is formed by pressing both sides of the metal steel plate to form both bottom portions 80 and 81 and installing them on the mating surfaces of the inner left and right sides near the lower end of the outer box 64 and the back plate 64a. However, it is also possible to use a combination of a steel plate and a resin, a molded resin, or the like.

  Moreover, from the 1st bottom face part 80 to the lower machine room 82, the several roller 88 which can usually move a refrigerator to the front-back direction is attached to the front and back of the heat insulation box 50, and the floor surface on which the refrigerator is installed, As described above, the lower machine chamber 82 is formed by the space and the recess. The lower machine chamber 82 has a front side of the heat insulation box 50 of the lower machine chamber 82 from the condenser 83 of the refrigeration cycle and a rear side of the evaporator pan 84 for storing water defrosted by the evaporator 76 and the first bottom surface portion 80. A heat radiating fan 86 for convection in the space is arranged and a drain pipe 89 for sending water defrosted by the radiant heater 78 to the evaporating dish 84 is provided from the second bottom surface portion 81 into the lower machine chamber 82. The rear opening is covered with a lower machine room cover 82a.

  The condenser 83 is typically a spiral fin tube type and is fitted into a resin-molded condenser duct 85 and attached to the first bottom surface portion 80 with screws or the like. On the other hand, the evaporating dish 84 is configured to have a size of substantially the entire width of the heat insulating box 50 from the first bottom surface portion 80 to the second bottom surface portion 81, and is arranged to be placed on the condenser duct 85. The evaporating dish 84 may be integrally formed with the condenser duct 85. Further, a temperature sensor mechanism 108 that detects the temperature in the lower machine chamber 82 may be provided in the lower machine chamber 82.

  A part of the upper machine room cover 62a and the lower machine room cover 82a are configured by steps or inclined surfaces that continue to the front side of the heat insulation box 50 toward the side wall side of the heat insulation box 50. A plurality of openings 109 and 110 are formed in a step or inclined surface of the machine room cover 62a and the lower machine room cover 82a.

  Further, not only the upper and lower machine room covers 62a and 82a as described above but also the same step or inclined surface can be formed in the entire height of the back plate 64a of the heat insulating box 50. In that case, the left and right both sides on the back side of the heat insulation box 50 form a step or inclined surface that is continuous in the vertical direction.

  The refrigerating room 51 is provided with a refrigerating room duct 90 for passing the cold air cooled in the cooling room 70 at the rear of the inside of the warehouse, so that the cold air is distributed from the plurality of discharge holes (not shown) to the entire inside of the warehouse. ing. The cold air passage and the inside of the cabinet are simply insulated with foamed polystyrene or the like, and are insulated from the inside of the cabinet. On the other hand, the inside of the warehouse is provided with a plurality of storage shelves 91 for organizing and storing the stored items without overlapping, and a part thereof is configured to be movable up and down. The uppermost storage shelf 91 is preferably substantially flush with the ceiling portion of the inner box 68 of the upper machine room 62. At the bottom, a specific low-temperature chamber is provided so that fresh meat and fish can be stored deliciously, and is set to about -1 ° C to 1 ° C. Further, a water supply tank 93 for storing water for making ice is provided next to the specific low temperature chamber so that it can be drawn out in the front-rear direction. In addition, a plurality of pockets 94 that can efficiently store and store beverages such as plastic bottles and milk cartons, and medium bottles such as seasonings are provided inside the refrigerator compartment door 51a.

  The ice making chamber 52 is provided with an ice making mechanism 95 for drawing water from the water supply tank 93 of the refrigerator compartment 51 in the upper space to generate ice, and an ice storage container 96 for storing the generated ice is arranged in the lower space. is doing. By moving the ice making chamber door 52a in the front-rear direction, the ice storage container 96 is supported by rails in the cabinet so as to move together.

  The first freezer compartment 53 is provided with a container for organizing and storing food and has an upper surface opened. The container is supported by rails in the cabinet so that the container moves together by moving the front first freezer compartment door 53a in the front-rear direction. A first freezer compartment duct 100 for passing cold air cooled in the cooling chamber 70 is provided on the back surface, and cold air is distributed from the plurality of discharge holes (not shown) to the entire interior. The air passage is simply insulated and separates from the inside of the cabinet. In addition to the freezing temperature, the first freezing chamber 53 can be configured as a chamber whose temperature can be switched from a refrigeration temperature zone of about 5 ° C. to a freezing temperature zone of about −18 ° C. In that case, the first freezer compartment duct 100 incorporates a sensor mechanism (not shown) for managing the internal temperature of the first freezer compartment 53 and a damper 101 as a cold air amount adjusting mechanism for temperature switching. Store.

  The second freezer compartment 54 is provided with a freezer compartment container 105 for organizing and storing food, and the upper surface is opened. The freezer compartment container 105 is supported by rails in the cabinet so that the freezer compartment container 105 moves together by moving the second freezer compartment door 54a in the front-rear direction.

  The vegetable room 55 is provided with a vegetable room storage container 106 for mainly organizing and storing vegetables such as leaf vegetables, root vegetables and fruits, and the upper surface is opened. The vegetable compartment storage container 106 is supported by rails installed in the cabinet so that the vegetable compartment storage container 106 moves together by moving the front vegetable compartment door 55a in the front-rear direction. In particular, a simple partition or the like is provided on the front side of the vegetable compartment storage container 106 to form a compartment, and the height dimension of the vegetable compartment storage container 106 is set so that PET bottles and vegetables can be stored vertically. It should be considered that the vegetable compartment door 55a can be taken out by opening it a little.

  As described above, the compressor 63 of the refrigeration cycle does not exist in the rear region of the second freezer compartment 54, and the inside of the refrigerator compartment 51 has a depth to the refrigerator compartment duct 90, the ice making compartment 52, and the first freezer compartment 53. The inside of the storage room can secure a depth to the first freezer compartment duct 100, and the inside of the second freezer compartment 54 and the vegetable compartment 55 can have a depth to the first partition wall 71. The uppermost stage of the refrigerating room 51 of the machine room 62 protrudes the most, and the cooling room 70 is arranged in a straight line in the vertical direction with substantially the same thickness so as not to increase the thickness in the depth direction as much as possible. As a result, the ice making chamber 52, the first freezing chamber 53, the second freezing chamber 54, and the vegetable chamber 55, which are lower storage chambers of the second partition wall 72, are formed with substantially the same depth.

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

  First, the refrigeration cycle operation will be described. The refrigeration cycle is operated by a signal from a control board (not shown) according to the set temperature in the cabinet, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 63 releases heat in the condenser 83 to be condensed and liquefied, and is reduced in pressure while exchanging heat with a capillary tube (not shown) to become a low-temperature and low-pressure liquid refrigerant. It reaches the evaporator 76.

  By the operation of the cooling fan 77, heat is exchanged with the air in each storage chamber, the refrigerant in the cooler 76 evaporates, and supply of low-temperature cold air is controlled by a damper device or the like. Cooling is performed so that the temperature can be maintained. The refrigerant exiting the evaporator 76 is sucked into the compressor 63 through the suction pipe.

  The compressor 63 is placed on the second top surface portion 61 of the heat insulating box 50 and is not disposed in the rear region of the second freezer compartment 54, and the cooling chamber 70 is placed between the second freezer compartment 54 and the vegetable compartment 55. By arranging the evaporator 76 and the cooling fan 77 within the height range of the second freezer compartment 54 and the vegetable compartment 55, and arranging the evaporator 76 in the height direction to reduce the depth dimension, By reducing the thickness of the cooling chamber 70, the ineffective space that does not contribute to the internal volume can be reduced.

  Further, the condenser 83 is installed by reducing the height dimension to substantially the entire width outside the front of the bottom surface of the heat insulating box 50 and by attaching the evaporating dish 84 in the vicinity of the lower machine chamber 82 with a reduced height dimension. By reducing the height of the lower machine room 82 that is the space between the floor surface and the first bottom surface portion 80 and the space up to the second bottom surface portion 81, it is possible to reduce the invalid space that does not contribute to the internal volume.

  As described above, machine rooms 62 and 82 are provided above and below the heat insulation box 50 in a space near the invalid space that is most difficult for the user's hand to reach the back of the top and bottom of the heat insulation box 50. By storing compactly the parts required for the refrigeration cycle such as the compressor 63, the condenser 83, and the evaporating dish 84 that do not contribute to the product, the storage volume at a height position that is easy for the user to use is increased, and the storage performance is improved. It becomes possible.

  By configuring the protruding height of the upper machine room 62 provided behind the top surface of the heat insulation box 50 to the inner side so as not to protrude downward from the highest shelf among the plurality of shelves in the refrigerator compartment. Although the depth for storing only the lowest most frequently used stage is small, the storage volume below the top stage is large, and it can be finished in a neat design that does not appear to be compressed when the refrigerator door 51a is opened. it can.

  Heat is exchanged in the condenser 83 by placing the condenser 83 in front of the heat insulation box 50 and the evaporating dish 84 in the vicinity of the lower machine chamber 82 at the rear in the arrangement outside the bottom surface of the heat insulation box 50. Since the warm air causes an updraft, convection occurs in the space above the evaporating dish 84 and the ability to evaporate the stored water can be improved. However, the heat radiating fan 86 convects toward the back of the heat insulating box 50. By improving the heat dissipation capability of the condenser 83 arranged in the vicinity, the capability of evaporating water staying in the evaporating dish 84 can be improved, and both can be further downsized.

  Even if the evaporating dish 84 is in the front and the condenser 83 is in the rear, convection in the space due to heat radiation occurs, so that the evaporating capacity can be similarly effective. Further, by providing the evaporating dish pipe 111 for circulating the high-temperature and high-pressure refrigerant compressed by the compressor 63 in the evaporating dish 84, the ability to evaporate defrost water can be improved, and the evaporating dish 84 can be further downsized. .

  In addition, not only the condenser 83 such as a spiral fin tube but only a pipe is provided in the lower machine chamber 82 and used as an evaporating dish pipe 111 for promoting evaporation, and also used as a condenser for radiating heat. be able to. In this case, contact with the water staying in the evaporating dish 84 is expected to further improve the heat dissipating capacity. As a result, the condenser 83 can be eliminated and used as a storage volume in the storage chamber.

  The lower machine chamber 82 on the bottom surface of the heat insulating box 50 serves as a drain pipe 89 for sending water defrosted by the radiant heater 78 to the evaporating dish 84 in addition to housing the evaporating dish 84 and the condenser 83. This also serves to enhance the workability of attaching the space and the condenser 83 and improving the workability of taking out the evaporating dish 84.

  If the upper machine chamber cover 62a provided in the upper machine chamber 62 is provided with an opening 109 for heat dissipation and exhaust heat, the effect can be enhanced. Further, if the lower machine room cover 82a provided in the lower machine room 82 is provided with an opening 110 for heat dissipation and exhaust heat, the effect can be enhanced. If the openings 109 and 110 are provided at a level difference or inclined portion between the upper machine room cover 62a and the lower machine room cover 82a that are not close to at least the surrounding wall surface when the refrigerator is installed, heat dissipation and exhaust heat are provided. The effect can be further enhanced. Further, when a plurality of openings are provided, the effect can be further enhanced.

  Furthermore, if not only the upper and lower machine room covers 62a and 82a but also the left and right both sides on the back side of the heat insulating box 50 are provided with steps or inclined surfaces that are continuous in the vertical direction, the refrigerator is installed with the left and right rear sides of the refrigerator surrounded. Even so, it can be formed as a full-height duct and can efficiently and reasonably exhaust heat.

  The machine room fan 79 can be operated efficiently if it is synchronized with the operation of the compressor 63 or controlled by inputting a detection signal of the temperature sensor mechanism 107 installed in the upper machine room 62 to the control board. The effect of heat dissipation and exhaust heat can be further enhanced.

  In addition, the heat radiating fan 86 can be operated efficiently if it is synchronized with the operation of the compressor 63 or controlled by inputting the detection signal of the temperature sensor mechanism 108 installed in the lower machine chamber 82 to the control board. The effect of heat dissipation and exhaust heat can be further enhanced.

  Since the refrigerator compartment 51 is very frequently used in the refrigerator, the user can look over the stored item at the line of sight while the refrigerator compartment door 51a is opened with the rotary refrigerator compartment door 51a. . In addition, by making the front opening of the refrigerator compartment 51 larger than the other storage rooms, the lower end of the opening is set to be 120 cm or less from the floor where the refrigerator is installed, that is, lower than the position of a general female shoulder, Easy to put in and take out the lower refrigeration room 51. Further, it is possible to store items that are frequently used in the lower level and store items that are less frequently stored in the upper level.

  The ice making chamber 52 is arranged near the center of the heat insulation box 50 in the height direction so that ice can be easily taken out without bending, and by making it an independent chamber, it prevents odors from other rooms, Furthermore, since the ice making chamber door 52a is provided individually, intrusion of outside air due to opening and closing of the door is suppressed, which leads to energy saving. In addition, since the usage frequency is high and a large amount of ice is required in summer, by reducing the size of the air passage (not shown) and the damper constituting the first freezer compartment duct 100 at the back of the ice making chamber 52, The depth of the cooling chamber 70 can be made smaller, and in this case, the depth of the ice making chamber container 96 for storing ice can be further extended to increase the amount of ice storage.

  The first freezing chamber 53 is arranged side by side with the ice making chamber 52, and it is necessary to reduce the form of the food to be stored in order to freeze the food faster for freezing and short-term storage. By making it smaller than the size and conversely increasing the height of the second freezer compartment, there is an advantage that stock of frozen foods and the like can be produced with a large capacity. Further, by making the first freezer compartment 53 a storage room having a function that can be switched from a refrigeration temperature zone to a freezing temperature zone, the value can be improved by adding a function that can cope with changes in the lifestyle of the user. be able to. Similarly to the ice making chamber 52, it is possible to reduce the depth of the cooling chamber 70 by reducing the size of the air passage (not shown) and the damper constituting the first freezer compartment duct 100. It is possible to further extend the depth of the first freezer compartment container (not shown) at an easy-to-use height position and increase the storage capacity.

  In the vegetable room 55, if the upper opening is 93 cm or less, that is, lower than the general female elbow position, the lifting cost of heavy vegetables such as Chinese cabbage and beverages such as plastic bottles is small and easy to put in and out. Greatly improved.

  The second freezer compartment 54 and the vegetable compartment 55 can be enjoyed even if they are not drawer-type storage rooms, but the utility is even greater if they are drawer-type storage rooms. That is, as the depths of the second freezer compartment 54 and the vegetable compartment 55 both increase, the drawer allowance of the freezer compartment storage container 105 and the vegetable compartment storage container 106 can be increased depending on the selection of rails, and the user can move inside the storage container. It is possible to efficiently put in and out the stored items while looking out over the spacious area, and it can be managed hygienically with less forgetting to use. When selecting rails, the effect can be further enjoyed by adopting high-quality bearing-type rails with high slidability and types of rails that have intermediate rails and can be extended to the outside of the warehouse. .

  In addition, since the cooling chamber 70 is installed on the projection surface in the height direction with an area substantially equal to the bottom surface portion 87 of the lower machine chamber 82, the width of the cooling chamber 70 and the interior of the lower machine chamber 82 are moved. The protrusion allowance of the container is almost the same, and the freezer compartment container can be formed in a rectangular parallelepiped shape, and the depth can be increased to increase the storage efficiency. In addition, since the evaporator 76 is provided directly above the bottom surface of the interior, it can be used as a part of the path when the frost of the evaporator 76 is sent to the evaporation tray 84, and the bottom surface 87 of the interior is further connected to the evaporator. If it is formed as a frost receiver of 76, the cost merit is great because it is possible to reduce the parts of the dew receiver that are generally used.

  In the present embodiment, the drawer-type vegetable compartment 55 is at the top and the second freezer compartment 54 is at the bottom, but the drawer-type second freezer compartment 54 is at the top in the opposite arrangement. The same effect can be obtained even when the vegetable compartment 55 is at the bottom.

  As described above, the refrigerator according to the present invention is efficient by providing machine rooms on the top and bottom portions of the heat insulation box, dividing the compressor and the condenser, and providing a fan for cooling each. Since it can be cooled well, the machine room can be made compact, and as a result, the storage volume in the storage room can be increased and the storage performance can be improved. Therefore, the machine room can be widely applied to applications such as commercial refrigerators and freezers.

Front view of the refrigerator in Embodiment 1 of the present invention The front view of the heat insulation box of the state which opened the door of the refrigerator in the embodiment BB sectional view of FIG. The principal part perspective view of the top | upper surface rear part of the heat insulation box of the refrigerator in the embodiment Sectional drawing of the principal part of the bottom face rear part of the heat insulation box of the refrigerator in the embodiment The principal part disassembled perspective view of the bottom face rear part of the heat insulation box of the refrigerator in the embodiment Cross-sectional view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 50 Heat insulation box 51 Refrigeration room 52 Ice making room 53 1st freezer room 54 2nd freezer room 55 Vegetable room 62 Upper machine room 62a Upper machine room cover 63 Compressor 79 Machine room fan 82 Lower machine room 82a Lower machine room cover 83 Condenser 86 Radiation fan 107 Temperature sensor mechanism 108 Temperature sensor mechanism 109 Opening 110 Opening 111 Evaporating dish piping

Claims (6)

  A heat insulation box formed of an outer box, an inner box, and a foam heat insulating material, an upper machine room formed by being recessed in the rear part of the top surface of the heat insulation box, and a lower portion provided near the bottom surface of the heat insulation box A refrigerator comprising a machine room, wherein an upper machine room is provided with a compressor, a lower machine room is provided with at least a condenser, and both machine rooms are provided with a blower fan.   The refrigerator according to claim 1, further comprising an upper cover that covers the upper machine room and a lower cover that covers the lower machine room.   The refrigerator according to claim 2, wherein the upper cover and the lower cover are provided with openings.   The refrigerator according to claim 3, wherein the upper cover and the lower cover are provided with inclined portions toward the side walls of the heat insulating box, and an opening is provided in the inclined portion.   The refrigerator according to any one of claims 1 to 4, wherein the fan is operated in synchronization with the compressor.   The operation of the fan is characterized in that a temperature sensor is disposed in one or both of the upper machine room and the lower machine room, and the operation of the fan is controlled by a detection signal of the temperature sensor. The refrigerator according to any one of claims 1 to 4.

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