JP3722148B1 - refrigerator - Google Patents

Abstract

An object of the present invention is to provide a refrigerator with improved usability while ensuring the same depth dimension of the lowermost and upper drawer storage chambers.
In a refrigerator in which a compressor (111) is disposed on the top surface of a heat insulating box (101) and a drawer-type freezer compartment (103) is formed at the bottom and a drawer-type vegetable compartment (104) is formed at the top, a freezer compartment (103) and a vegetable compartment (104) are provided. A cooling chamber 112 is provided on the back surface of the chiller, and the evaporator 119 is disposed across the freezing chamber 103 and the vegetable chamber 104, and the depths of the freezing chamber storage container 116 and the vegetable chamber storage container 117 are increased substantially equally. By using this simple shape, the usability of the freezer compartment 103 and the vegetable compartment 104 can be improved, the quality of the refrigerator can be improved, and the manufacturing cost can be reduced.
[Selection] Figure 1

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 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, a recessed portion is provided so that the upper back of the uppermost storage chamber of the heat insulation box is lowered, and the compressor of the refrigeration cycle is provided in the recessed portion. There has been proposed a refrigerator that houses components on the high-pressure side such as (see, for example, Patent Document 1).

  FIG. 4 shows a longitudinal sectional view of a conventional refrigerator described in Patent Document 1. As shown in FIG.

  As shown in FIG. 4, the heat insulating box 1 includes 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 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 usability. Is provided. A plurality of storage shelves 8 are provided in the refrigerator compartment 2, and storage containers 9 a and 9 b each having an open top surface are attached to the freezer compartment 3 and the vegetable compartment 4. The storage containers 9a and 9b are supported on a rail (not shown) in the front-rear direction so as to be movable in the front-rear direction by a roller.

  The recessed part 10 provided in the heat insulation box 1 is a place where the top back part over the outer box upper surface 11 and the outer box back surface 12 is depressed so that the uppermost back part of the refrigerator compartment 2 is lowered. The left and right sides of the recess 10 are closed by the left and right walls of the heat insulating box 1 and open upward and to the back. The open portion of the recess 10 includes an upper plate 13 and a back plate 14 that is substantially perpendicular to the upper plate 13. The concave cover 15 is covered. The recess 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 recess 10 together with the machine room fan 18, and are covered with a recess cover 15 including the upper plate 13 and the back plate 14. Yes.

  In addition, the evaporator 20 which is a component device of the refrigeration cycle is disposed with a cooling fan 21 at the back of the freezing room 3 which is the middle stage of the heat insulating box 1, and the vegetable room 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 said conventional structure, by arrange | positioning the compressor 16 in the top | upper surface part of the heat insulation box 1, the internal volume and depth of the vegetable compartment 4 which is the lowest storage room can be enlarged, and storage property can also be improved. However, since it has a cooling chamber in which the evaporator 20 and the cooling fan 21 are arranged at the back of the freezing chamber 3, the depth of the freezing chamber 3 formed in front of the cooling chamber is reduced and adjacent to the lower portion. The depth with the vegetable room 4 will be considerably different.

  For this reason, the depths of the storage container 9a of the freezer compartment which is a drawer-type storage room and the storage container 9b of the vegetable room are also considerably different, and the freezing room drawer door 6 and the vegetable room drawer door 7 are pulled to maximize the storage containers 9a, 9b. Since the amount of drawer when it is pulled out to the limit is considerably different, it gives the user a sense of incongruity and impairs a refreshing sense of unity.

  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.

  Furthermore, since the depth of the drawer-type freezer compartment 3 and the depth of the vegetable compartment 4 are considerably different, the length of the rails for allowing the storage containers 9a and 9b to move back and forth and the storage containers 9a and 9b are placed. The length of the frame that slides on the rail surface differs depending on the roller, and these parts, which are relatively expensive, cannot be shared, and it is expensive if a smooth, elaborate, high-quality one is used to improve operability. Yes, if it cannot be shared, the burden on manufacturing costs is not small.

  As described above, even if the arrangement of the refrigeration cycle is devised in the conventional configuration and the compressor 16 is removed from the area of the lowermost storage chamber to increase the storage capacity and storage capacity, the arrangement of the evaporator 20 is still maintained. However, there is a difference in storage capacity and storage capacity between the lowermost storage room and the storage room immediately above it, that is, the freezing room 3 and the vegetable room 4, and in the case of a drawer-type storage room, the storage container 9a 9b has a problem in terms of usability in combination with the difference in the withdrawal allowance, and also has a problem in terms of manufacturing cost.

  Further, by arranging the compressor 16 on the upper part of the heat insulating box 1, the machine room space for accommodating the compressor 16 is naturally not provided in the lower region of the heat insulating box 1, and the illustration is made for that purpose. In order to accommodate refrigeration cycle components, parts, electrical wiring, control boards, and other related parts arranged in the lower region of the heat insulation box 1, to newly accommodate these parts and parts There was a problem of creating these new accommodation spaces without having to provide space and squeezing the space inside the cabinet.

  In particular, if there are no refrigeration cycle parts with heat dissipation such as the compressor 16 or the condenser 17 in the lower region, these refrigeration cycle parts cannot be used as a mechanism for evaporating the defrosted water from the evaporator 20. For example, a forced draft fan or the like needs to be newly installed as an evaporation promoting means instead of the above, but there has been a need to create a space that can accommodate such additional parts without pressing the space inside the cabinet.

  The present invention solves the above-described conventional problems, and in a refrigerator having a plurality of storage rooms, improves the usability of the lowermost storage room and at least the immediately upper storage room adjacent thereto, and is also related to the configuration It aims at providing the refrigerator which reduced the manufacturing cost of components.

In order to solve the above-described conventional problems, the refrigerator of the present invention forms a plurality of storage chambers in a heat insulating box having a front surface opened, and arranges a compressor of a refrigeration cycle on the top surface of the heat insulating box. The evaporator of the refrigeration cycle is accommodated in the vertical direction inside the cooling chamber partitioned in the back region of the lowermost storage chamber, and defrosted by the defroster and the defroster arranged at the lower part of the evaporator. Provided with a defrost water drain mechanism comprising a defrost water tray for receiving fresh water and a drain pipe connected to the defrost water tray so as to be substantially contained within a projection plane from above the cooling chamber, A recess serving as a storage space is provided in a projection plane from above the heat insulation wall of the heat insulation box constituting the back surface of the chamber and the cooling chamber, and is provided in the lower portion of the defrost water drainage mechanism. Defrosting from the defrost water drainage mechanism without providing the compressor The accumulated defrost water evaporating tray for storing a provided steam promoter means for promoting evaporation, the storage compartment of the bottom is obtained by substantially a rectangular solid shape.

This makes it possible to rationally accommodate the defroster and defrost water drainage mechanism by utilizing the space below the evaporator, and related parts and parts of the refrigeration cycle that need to be provided in the lower region of the heat insulation box And related parts such as fans, electrical wiring, and control boards can be rationally accommodated in the recess, and evaporation can be promoted in the space in the recess even if the compressor is not located nearby. Therefore, it is possible to provide an easy-to-use storage room with a neat feeling and a large internal volume as much as possible without pressing the indoor side .

In the refrigerator of the present invention, the space shape in at least the lowermost storage chamber does not have a complicated shape, and the usability can be improved by increasing the storage capacity and improving the storage capacity.

According to the first aspect of the present invention, a plurality of storage chambers are defined in the heat insulating box having an open front surface, the compressor of the refrigeration cycle is disposed on the top surface of the heat insulating box, and the rear surface of the lowermost storage chamber The defrosting water which receives the water defrosted by the defroster arranged in the lower part of the evaporator which accommodates the evaporator of a refrigerating cycle in the up-and-down direction inside the cooling room divided into the field, and the defroster A defrosting water drainage mechanism comprising a tray and a drain pipe connected to the defrosting water tray is provided so as to be substantially within a projection plane from above the cooling chamber, and the cooling chamber and the rear surface of the cooling chamber A recessed portion serving as a storage space is provided in a lower part of the defrost water drainage mechanism substantially within a projection plane from above the heat insulating wall of the heat insulating box that constitutes the compressor, and the compressor is provided in the recessed portion. Not collected in the evaporating dish for collecting defrost water from the defrost water drainage mechanism Evaporation promotion means for promoting evaporation of frost water is provided, and the lowermost storage chamber has a substantially rectangular parallelepiped shape. The defroster and defrost water drainage mechanism are rationalized by utilizing the space below the evaporator. Refrigeration cycle related parts that need to be installed in the lower area of the heat insulation box, related parts such as parts, fans, electrical wiring, and control boards can be reasonably stored in the recesses. In addition, since the evaporation can be promoted in the space in the recess even if the compressor is not arranged in the vicinity, the interior is not compressed, and the interior volume is increased as much as possible to provide a clean and convenient storage room. Can be provided.

The invention according to claim 2 is the invention according to claim 1, wherein the lowermost storage chamber is the first storage chamber, and the second storage chamber is partitioned by an insulating partition wall at the upper portion of the first storage chamber. The cooling chamber is partitioned in the vertical direction across the back surfaces of the first storage chamber and the second storage chamber, and the first storage chamber and the second storage chamber With a substantially rectangular parallelepiped shape, and the evaporator is accommodated in the vertical direction at almost the entire height of the back surface across the two storage chambers from the bottom of the first storage chamber to the top of the second storage chamber. It can be used as a cooling room.

  If the height of the evaporator is increased by making use of the height of the cooling chamber and the depth of the evaporator is shortened, the evaporator can be thinned while maintaining the cooling capacity. As a result, the thickness of the cooling chamber can be reduced, and the compressor is outside the area of the two storage chambers. It is possible to improve the usability by improving the performance.

A third aspect of the present invention is the invention according to the first or second aspect, wherein the lowermost storage chamber and / or the upper storage chamber of the lowermost storage chamber is a drawer-type storage provided with a drawer door. As the chamber, the storage container drawn out by the drawer door has a substantially rectangular parallelepiped shape, and the storage container can be expanded without making it a complicated shape to improve usability.
In particular, when the two upper and lower storage chambers are storage chambers equipped with drawer-type storage containers, the entire height of the rear surface across the two storage chambers should be used as a cooling chamber for storing the evaporator vertically. If the height of the evaporator is increased by taking advantage of the height of the cooling chamber and the depth of the evaporator is shortened, the evaporator can be made thinner while maintaining the cooling capacity. Expands to further increase storage capacity. In addition, if the depths in the storage chambers are almost the same, the storage container drawer allowance can be made substantially the same, and the usability can be improved, and the manufacturing cost of parts related to the drawer structure can be reduced.
by this,

According to a fourth aspect of the present invention, in the invention of the second or third aspect , the evaporator extends across the first storage chamber and the second storage chamber including a rear region of the heat insulating partition wall. And a cooling fan is arranged in a space above the evaporator. Since the region of the height of the first storage chamber and the second storage chamber can be utilized, the degree of freedom for increasing the height of the evaporator and reducing the depth dimension is increased. Then, the depth of the evaporator can be reduced, so that the thickness of the cooling chamber can be reduced to increase the depth of the first storage chamber and the second storage chamber. Further, even if the evaporator is arranged across both chambers, a space space remains in the vertical direction of the cooling chamber. Of these, the cooling fan can be rationally accommodated by utilizing the space above the evaporator.

Invention of Claim 5 uses the condensation piping of the condenser of the refrigerating cycle in the invention as described in any one of Claim 1 to 4 as said evaporation promotion means, Evaporation of drained defrost water can be promoted by heat conduction.

The invention according to claim 6 is the invention according to any one of claims 1 to 5 , wherein a forced draft fan is used as the evaporation promoting means, and the evaporation promoting effect can be enhanced without contact. In addition to facilitating evaporation of the defrosted water, it is possible to eliminate air stagnation and prevent condensation on the surrounding structure.

The invention according to claim 7 is configured to promote heat dissipation of the condenser of the refrigeration cycle by forced convection of the forced draft fan in the invention according to claim 6 , and improves the heat dissipation capability of the condenser. Can also be achieved.

The invention according to claim 8 is the invention according to any one of claims 1 to 7 , wherein the whole of the evaporating dish and the evaporation accelerating means are accommodated in the recess, and the lower region is more compact. The component arrangement can be consolidated, and the degree of influence on the internal volume can be further reduced.

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

(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a refrigerator in Embodiment 1 of the present invention.

  In FIG. 1, a heat insulating box 101 configured to be insulated from the surroundings with a heat insulating material such as hard foamed urethane is divided into a plurality of sections, with the refrigerator compartment 102 at the top and the first storage at the bottom. A freezer compartment 103 as a room, and a vegetable compartment 104 as a second storage room is arranged directly above the freezer compartment 103 between the refrigerator compartment 102 and the freezer compartment 103. Both the freezing room 103 and the vegetable room 104 have the form of a drawer-type storage room. The front opening of each storage room is provided with a refrigerating room rotary door 105, a freezing room drawer door 106, and a vegetable room drawer door 107, which are heat insulating doors.

  The refrigerator compartment 102 is normally set at 1 to 5 ° C. with the temperature that does not freeze for refrigerated storage as the lower limit. In addition, the vegetable room 104 is often set to a temperature setting of 2 ° C. to 7 ° C. that is equal to or slightly higher than that of the refrigerator room 102. The lower the temperature, the longer the freshness of the leafy vegetables can be maintained.

  The freezer compartment 103 is set in a freezing temperature zone, and is usually set at −22 to −18 ° C. for frozen storage. However, in order to improve the frozen storage state, for example, a low temperature of −30 or −25 ° C. It may be set by.

  The top surface portion of the heat insulating box 101 is provided with a step-like recess toward the back of the refrigerator, and is composed of a first top surface portion 108 and a second top surface portion 109. The compressor 111 and components on the high-pressure side of the refrigeration cycle such as a dryer (not shown) for removing moisture are housed.

  That is, the recess 110 in which the compressor 111 is disposed is formed by biting into the uppermost rear region in the refrigerator compartment 102. Therefore, the compressor 111 is not disposed in the rear region of the lowermost storage chamber of the heat insulating box 101 that has been generally used conventionally.

  A cooling chamber 112 is provided across the back of both the freezing chamber 103 and the vegetable chamber 104, and the cooling chamber 112 is partitioned from the freezing chamber 103 and the vegetable chamber 104 by a first partition 113 having heat insulating properties as a partition wall. ing.

  Moreover, the freezer compartment 103 and the vegetable compartment 104 are partitioned off by the 2nd partition 114 which has heat insulation as a heat insulation partition wall. Since the first partition 113 and the second partition 114 are parts that are assembled after foaming of the heat insulating box 101, foamed polystyrene is usually used as a heat insulating material, but hard foamed urethane is used to improve heat insulating performance and rigidity. Further, a highly heat insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.

  The refrigerator compartment 102 and the vegetable compartment 104 are partitioned by a third partition 115. The third partition 115 is a heat insulating material as necessary, for example, when the upper part of the vegetable compartment 104 is not directly adjacent to the refrigerator compartment 102 but is adjacent to a temperature zone room lower than the refrigerator temperature such as a low temperature room or an ice making room. It is good also as a heat insulation partition using.

  The freezer compartment 103 and the vegetable compartment 104 each have an open top surface as a storage container for a first pull-out storage chamber for storing food and an upper surface as a storage container for a second pull-out storage chamber. The vegetable compartment storage container 117 is opened, and each of the storage containers 116 and 117 is movable in the front-rear direction by a front-rear rail (not shown) and a frame with rollers on which the storage containers 116 and 117 are placed. It is supported.

  In the cooling chamber 112, a fin-and-tube evaporator 118 as a typical example includes the freezing chamber 103 and the vegetable chamber 104 in the vertical direction including the rear region of the second partition 114 which is a heat insulating partition wall. Are arranged so that the arrangement ratio of the region of the freezer compartment 103 is larger than the arrangement ratio of the region of the vegetable compartment 104.

  In the upper space of the evaporator 118, a cooling fan 119 that blows cold air cooled by the evaporator 118 is disposed in the refrigerator compartment 102, the freezer compartment 103, and the vegetable compartment 104 by a forced convection method, and the lower space of the evaporator 118 is cooled. A radiant heater 120 made of a glass tube is provided as a defrosting device that defrosts frost that sometimes adheres to the evaporator 118 and the cooling fan 119.

  Moreover, the defrost water drainage mechanism comprised by the defrost water receiving tray 121 which receives the water defrosted with the radiant heater 120, and the drainage pipe 122 which guides the defrost water connected to the defrost water receiving tray 121 out of the store | warehouse | chamber. 123 is installed so as to be substantially within the projection plane from above the cooling chamber 112. The drain pipe 122 penetrates the bottom surface of the heat insulation box 101 and is drained to the evaporating dish 124 provided at the bottom bottom of the heat insulation box 101.

  The evaporating dish 124 is formed shallowly so as to increase the area where the drained defrost water comes into contact with air, and the evaporating dish 124 has a condensing pipe, a heater, etc. for promoting evaporation of the drained defrost water. The heating device (not shown) is arranged to operate.

  Since the compressor 111 of the refrigeration cycle does not exist in the rear region of the freezing chamber 103 as described above, the cooling chamber 112 and the defrosted water drainage mechanism 123 are substantially the top surface of the vegetable chamber 104 from the substantially bottom surface of the freezing chamber 103. Considering not to increase the thickness in the depth direction as much as possible up to the height of the third partition 115 so as to penetrate the rear region of the second partition 114, which is a heat insulating partition wall, in the vertical direction with almost the same thickness It is arranged on a straight line.

  As a result, the depth in the freezer compartment 103 from the back surface on the indoor side of the freezer drawer door 106 to the first partition 113 serving as the front wall of the cooling chamber 112 and the back surface on the indoor side of the vegetable compartment drawer door 107 The depth in the vegetable compartment 104 to the 1st partition 113 used as a front wall is formed in substantially the same depth.

  Similarly, the depth of the freezer compartment storage container 116 drawn out by the freezer compartment drawer door 106 and the depth of the vegetable compartment storage container 117 drawn out by the vegetable compartment drawer door 107 are substantially the same, and the shape thereof is also used. Since the protruding portion corresponding to the conventional machine room does not bite behind the freezer compartment 103, both have a substantially rectangular parallelepiped shape.

  In accordance with this, the rails for moving the freezer compartment storage container 116 and the vegetable compartment storage container 117 back and forth are also substantially equivalent in length.

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

  First, the operation of the refrigeration cycle 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 111 dissipates heat in a condenser (not shown), condenses and liquefies, and reaches a capillary tube (not shown). After that, the capillary tube is depressurized while exchanging heat with a suction pipe (not shown) to the compressor 111 to become a low-temperature and low-pressure liquid refrigerant and reach the evaporator 118.

  By the operation of the cooling fan 119, heat is exchanged with the air in each storage chamber, the refrigerant in the evaporator 118 evaporates, and the supply of low-temperature cold air with a damper device (not shown) or the like is controlled. Cool down. The refrigerant exiting the evaporator 118 is sucked into the compressor 111 through the suction pipe.

  The compressor 111 is disposed on the top surface of the heat insulating box 101 and is not disposed in the rear region of the freezer compartment 103, the cooling chamber 112 is disposed on the back of the freezer compartment 103 and the vegetable compartment 104, the evaporator 118 and the cooling fan 119 is provided approximately within the height range of the freezer compartment 103 and the vegetable compartment 104, and the evaporator 118 is extended in the height direction to shorten the depth dimension, thereby reducing the thickness of the cooling chamber 112 and contributing to the internal volume. The free space can be reduced, and by making the depth dimensions of the freezer compartment storage container 116 and the vegetable compartment storage container 117 substantially the same, the freezer compartment container 116 can be obtained without reducing the internal volume of one storage room. The depth dimensions with the vegetable compartment storage container 117 can both be increased, and the storage capacity can be increased to improve usability.

  In particular, in recent years, heavy objects are placed in the upper position where the most frequently used refrigeration room can be opened and opened in front of the user in view of the user's usage frequency, ease of freshness management, ergonomics, etc. In the middle of the vegetable room where you can take in and out, and you want to maintain freshness on a daily basis. However, it is a disadvantage that the storage space of the lowermost freezer compartment cannot be sufficiently secured by the layout of the machine room including the compressor in this layout. According to the above, the depth of the freezer compartment 103 at the bottom can be expanded in the same way as the vegetable compartment 104, and the interior space shape is not complicated, and large items can be stored reasonably. A highly convenient refrigerator that can sufficiently handle the increase in the frequency of use of frozen foods due to the increase in short-term frozen stored flow foods such as lunch boxes and side dishes, as well as stock foods that are stored frozen for a long time. Can be provided.

  These effects relating to storage capacity and storability can be enjoyed even if the freezer compartment 103 and the vegetable compartment 104 are not drawer-type storage rooms, but the utility is even greater if they are drawer-type storage rooms. In other words, by making the drawer rail lengths substantially the same, the drawer allowance of the freezer compartment storage container 116 and the drawer allowance of the vegetable compartment storage container 117 can be made substantially equal, and the user can make daily use. The storage containers in both chambers can be pulled out without feeling uncomfortable with the difference in the drawer allowance. Also, the storage containers that are pulled out can be arranged in a simple rectangular shape. The product quality of the refrigerator will be high.

  In addition, since the depths in the freezer compartment 103 and the vegetable compartment 104 both increase, the drawer allowance of the freezer compartment storage container 116 and the vegetable compartment storage container 117 can be increased depending on the selection of the rails. It is possible to efficiently put in and out the goods while looking out over the spacious area, and to manage 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 rails that have intermediate rails and can be extended to the outside. .

  Moreover, if the length of the rail for moving the freezer compartment storage container 116 and the vegetable compartment storage container 117 in the front-rear direction is made substantially the same, the entire rail and some of the components can be shared. Manufacturing costs can be reduced. In particular, high-quality, high-functional rails such as those described above are expensive in parts cost, and the cost reduction effect that can be shared is also great in reducing the cost burden in the manufacturing process and part management.

  In addition, such a cost reduction effect can be applied not only to the rail but also to the sharing of related parts such as a frame that moves the rail surface by placing the storage container 116 for the freezer compartment and the storage container 117 for the vegetable compartment. It is.

  Moreover, even if the freezer compartment 103 and the vegetable compartment 104 are not drawer-type storage rooms, parts such as shelves provided in the room can be shared by making the interior depth substantially the same.

  Further, in the first partition 113, a cooling fan 119, a cool air discharge air passage (not shown) for supplying cool air to each storage chamber, and cool air in which heat exchanged from each storage chamber returns to the evaporator 118. By constructing a return air passage (not shown), assembly is facilitated and the number of assembly steps can be reduced.

  Moreover, it provided in the lower part of the heat insulation box 101 from the defrost water receiving tray 121 by providing the defrost water receiving tray 121 which receives the defrosting water which generate | occur | produces at the time of defrosting in the back part substantially the same surface as the bottom face of the freezer compartment 3. The length of the drain pipe 122 that drains the defrost water to the evaporating dish 124 can be shortened, and even if the drain pipe 122 is cooled during the internal cooling operation due to the short length of the drain pipe 122, the defrosting device is used at the time of defrosting. Since the temperature rises due to the radiant heat of the radiant heater 120, the water in the drain pipe 122 can be prevented from freezing even without a freezing prevention heater.

  Here, the cooling fan 119, the evaporator 118, the radiant heater 120, the defrosted water receiving tray 121, and the drain pipe 122 arranged in the vertical direction in the cooling chamber 112 are substantially aligned within the vertical projection area of the cooling chamber 112. Therefore, the thickness of the ineffective space that does not contribute to the volume of the room is suppressed as much as possible, and the depth of the freezing room 103 and the vegetable room 104 is increased almost equally, and the radiant heating of the radiant heater 120 is effectively utilized. The cooling fan 119, the evaporator 118, the defrost water tray 121, and the drain pipe 122 can achieve both effects of effectively defrosting frost adhering to various places.

  In order to further reduce the thickness of the cooling chamber 112, there is a method of maintaining the cooling capacity by reducing the depth dimension of the evaporator 118 and increasing the height dimension accordingly. It is preferable to appropriately take measures against frost clogging, measures against insufficient radiant heating of the radiant heater 120 due to an increase in height dimension, and the like.

  Countermeasures against clogging with frost include arrangement of return air passages and fin arrangement, etc. As a countermeasure against heating, an auxiliary heater is provided separately, or heat is transferred by contacting the evaporator surface instead of radiant heater 120. A pipe heater may be used. Further, the type of the evaporator may be other than the fin-and-tube, and the type that can reduce the thickness may be employed.

  Even if the thickness of the evaporator 118 is suppressed, the depth dimension of the cooling fan 119 may not be accompanied by this. In addition, the heat insulation thickness in the case of using a heat insulating material for the first partition 113 may be different between the freezer compartment 103 side and the vegetable compartment 104 side. Strictly speaking, the thickness of the cooling chamber 112 is slightly different depending on the vertical part. However, if the depths of the freezer compartment 103 and the vegetable compartment 104 can be expanded and secured almost equally, the object can be achieved.

  In addition, it arrange | positions so that the arrangement | positioning ratio of the evaporator 118 arrange | positioned across the back surface of the freezer compartment 103 and the back surface of the vegetable compartment 104 may become large in the freezer compartment 103 side, to the vegetable compartment 104 side which is a refrigerator temperature zone. Can reduce the effect of overcooling. Moreover, the structure of the heat insulating material of the 1st partition 113 by the side of the vegetable compartment 104 can also be simplified, Absorbing the difference in the thickness of the up-down direction of the 1st partition 113 as much as possible, and suppressing the influence on both room depths. Can do.

  In general, the evaporator for refrigerators has the required cooling capacity mainly determined by the external dimensions and volume of the refrigerator, and the external dimensions of the evaporator and the pitch of the fins where heat exchange is performed to ensure the required cooling capacity. In general, the required heat exchange surface area is calculated from the number of heat transfer tubes and the like. Since the heat exchange surface area is roughly determined mainly by the volume of the external dimensions of the evaporator, for example, in large refrigerators, the refrigerator external width is often about 600 mm to 700 mm, and if the external width of the refrigerator is determined, it is generally evaporated. Since the width dimension of the evaporator is determined, the depth dimension and the height dimension of the evaporator are determined by the ratio of the depth dimension and the height dimension of the evaporator.

  In general, the depth dimension of the evaporator is often about 60 mm to 75 mm in terms of cooling capacity and anti-frosting surface, and the height dimension of the evaporator of the type of cooling that is cooled by one evaporator, For example, it is about 200 mm, and the depth dimension and height dimension of the evaporator are configured in a ratio of approximately 1: 2 to 1: 3.

  The evaporator 118 according to the present embodiment is configured such that the depth dimension and the height dimension are in a ratio of 1: 4 to 1:10, and the depth dimension is reduced and the height dimension is increased as compared with the conventional evaporator. Yes. For example, the evaporator depth dimension is set to 40 mm to 50 mm, and the height dimension is enlarged as compared with the conventional one.

  However, generally, if the evaporator depth dimension is reduced, the lower surface area on the suction side of the evaporator is reduced, so that the lower surface of the evaporator becomes clogged with frost when the door opening / closing frequency is high and the cooling capacity deteriorates. The possibility increases. (Table 1) shows the relationship between the ratio of the depth and height dimensions of the evaporator and the degree of deterioration of the evaporator cooling capacity during frost formation and the degree of thinning of the evaporator when the external volume is constant. It is.

  According to (Table 1), when the depth dimension of the evaporator and the height dimension of the evaporator exceed a ratio of 1:10, the thickness of the evaporator can be sufficiently reduced and the effect of achieving the object of the present embodiment can be achieved. Although it exhibits, the opening area on the air suction side is reduced, and clogging due to frost formation causes severe deterioration of the evaporator cooling capacity due to a decrease in the air flow rate, that is, the heat exchange amount. On the other hand, the smaller the ratio, the larger the opening area on the air suction side, and the degree of cooling capacity deterioration due to clogging during frost formation is suppressed. However, when the ratio is less than 1: 4, the height of the evaporator becomes shorter. As a result, the heat exchange distance between the fins and the refrigerant pipe when the amount of frost formation is small cannot be secured gradually, and the cooling efficiency tends to decrease. Further, the object of the present embodiment for reducing the thickness of the evaporator cannot be achieved. In order to achieve a sufficient thinning effect in the present embodiment, if the depth dimension of the evaporator is the same as the height dimension and the depth dimension is 1, the depth dimension is approximately 0.5 or less. Can be reached.

  It should be noted that the ratio of the conventional evaporator is less than 1: 4 because the evaporator is disposed in the freezer compartment, which is the lowest storage chamber, and corresponds to the upper part of the machine room containing the compressor. This is because it is necessary to ensure the heat exchange surface area by inevitably reducing the height dimension and increasing the depth dimension because it is necessary to accommodate in a narrow space.

  And when the ratio of the depth dimension of an evaporator and the height dimension of an evaporator exists in the range of 1: 4 to 1:10, compared with the conventional ratio of 1: 2 to 1: 3, cooling at the time of frost formation Although the degree of capability deterioration is inferior, the difference is small, and it can sufficiently meet the purpose of thinning the evaporator.

  As described above, by configuring the depth dimension and height dimension of the evaporator 118 at a ratio of 1: 4 to 1:10, the depth of the evaporator 118 is suppressed while suppressing the deterioration degree of the cooling capacity assumed in actual use. The size can be shortened, and the cooling chamber 112 can be thinned to increase both the freezing chamber 103 and the vegetable chamber 104 in the cabinet.

  Further, by installing the evaporating dish 124 on the bottom surface of the heat insulating box 101, it can be formed shallowly up to the extent equal to the plane cross-sectional dimension of the heat insulating box 101, and the defrost water is evaporated by increasing the surface area of the evaporating dish 124. The ability to be improved can be improved.

  Further, the height of the freezer compartment 103 and the height of the vegetable compartment 104 are substantially equal, and the height of the freezer compartment drawer door 106 and the vegetable compartment drawer door 107 are substantially equal, so that the freezer compartment drawer door 106 and the vegetable compartment drawer are substantially the same. The components of the door 107 can be shared, and the manufacturing cost can be reduced. When it is necessary to provide a difference in thermal insulation between the freezer compartment drawer door 106 and the vegetable compartment drawer door 107 due to the difference in temperature, the wall thickness of the hard foamed urethane used as the thermal insulation material is different, so that it can be used as a finished thermal insulation door. However, if there is no surface condensation problem on the freezer drawer door 106 based on the wall thickness standard of the vegetable compartment drawer door 107, it can be used as a complete insulated door. In this case, material costs and management costs The entire manufacturing cost including the man-hour cost can be greatly reduced. Furthermore, since it is the same door in terms of market service, inventory management becomes easy.

  Also, for example, if a highly heat-insulating vacuum heat insulating material is used for the freezer compartment drawer door 106, it is possible to absorb the difference in wall thickness with the vegetable compartment drawer door 107 while maintaining the heat insulation performance, and to share the external shape as a heat insulation door finished product. This makes it possible to facilitate assembly in the manufacturing process.

  In addition, if the freezer compartment 103 and the vegetable compartment 104 are substantially equal in height, it is conceivable that the drawer-type freezer compartment storage device 116 and the vegetable compartment storage container 117 can be shared. The cost merit is great because it is a resin injection molded product.

  On the other hand, in the present embodiment, the compressor 111 is accommodated in the concave portion 110 formed in the back portion of the top surface portion of the heat insulating box body 101 so as to be positioned behind the uppermost portion of the refrigerator compartment 102 which is the uppermost storage chamber. The rear of the uppermost part of the refrigerator compartment 102 is an area where the frequency of use is extremely low because it is difficult for the user to reach from the beginning, and is a substantially invalid space. However, the storage capacity is not substantially violated, and the effect of eliminating the compressor 111 from the rear region of the lowermost freezer compartment 103 can be maximized, and the overall convenience of the entire refrigerator can be improved. There is a merit that can be improved in a balanced manner.

  As described above, in the present embodiment, a configuration that effectively enhances usability is proposed in consideration of the balance of the entire refrigerator, but the rear region of the freezer compartment 103 and the vegetable compartment 104 at the bottom regarding the arrangement configuration of the compressor 111 If it arrange | positions other than, since the objective regarding the usability improvement of the freezer compartment 103 and the vegetable compartment 104 will be almost achieved, it will not be restricted to this Embodiment, For example, if the height as a refrigerator permits the heat insulation box 101 It is also conceivable that the compressor 111 is placed on the top surface or the compressor 111 is placed by raising the bottom of the heat insulating box 101, which is the lower part of the freezer compartment 103.

  In the present embodiment, the first drawer-type storage room is the freezing room 103, and the second drawer-type storage room is the vegetable room 104. However, in the reverse arrangement, the first drawer-type storage room is the vegetable. The same effect can be obtained also in the freezing room 103 as the room 104 and the second drawer-type storage room.

  In addition, the first pull-out storage chamber 103 and the second pull-out storage chamber 104 are partitioned by a first partition 113, a second partition 114, and a third partition 115 having heat insulation. For example, a refrigerator room other than the vegetable room and the freezer room, for example, a refrigerator room usually set at 1 to 5 ° C., and a relatively low temperature for improving the freshness of meat fish etc., for example, a low temperature set at −7 to 1 ° C. It is also possible to set a room or a freezing temperature ice making room for ice making. Moreover, it can be set as the switching chamber which can be switched to each temperature range including freezing temperature by providing the damper apparatus (not shown) which controls cool air.

(Embodiment 2)
FIG. 2 shows a longitudinal sectional view of the refrigerator in the second embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  A first cooling chamber 203 is partitioned in the vertical direction in the back areas of the freezer compartment 201 and the vegetable compartment 202, and a first evaporator 204 and a first cooling fan 205 are provided in the first cooling compartment 203. Then, the freezing room 201 in the freezing temperature zone is cooled by forced convection. In addition, a second cooling chamber 207 is provided on the rear surface in the refrigerator compartment 206, and a second evaporator 208 and a second cooling fan 209 are accommodated. The evaporation temperature is higher than that of the first evaporator 204. Then, the refrigerator compartment 206 and the vegetable compartment 202 in the refrigerator temperature zone are cooled by forced convection.

  In the above configuration, the first evaporator 204 disposed on the back of the freezer compartment 201 and the vegetable compartment 202 does not cool all the storage compartments, and the storage compartments in the refrigeration temperature zone are cooled in the refrigerating compartment 206. Since the first evaporator 204 is mainly cooled in a storage room in a freezing temperature zone such as the freezing room 201, the first evaporator 204 does not require a large cooling capacity and the amount of frost formation is also shared. To reduce.

  For this reason, the external dimension of the first evaporator 204 can be reduced, and the dimension in the depth direction can be reduced inevitably, so that the thickness can be further reduced as compared with the first embodiment.

  In the first embodiment, the ratio between the depth dimension and the height dimension of the evaporator shown in (Table 1) is in the range of 1: 5 to 1:10, and the evaporator is thin while maintaining the cooling capacity in practical use. In the case of the first evaporator 204 of the present embodiment, the amount of frost formation is originally small and the ratio is close to 1:10. However, there is little deterioration of the cooling capacity, and the thickness can be further reduced.

  In this way, if the thickness of the first evaporator 204 can be reduced, the thickness of the first cooling chamber 203 can be further reduced. As a result, the freezer compartment 201 and the vegetable compartment 202 can have a large depth. . Thereby, with respect to the freezer compartment 201 and the vegetable compartment 202, it is possible to provide a refrigerator that is further improved in usability by increasing the storage volume and the storage capacity as compared to the first embodiment.

(Embodiment 3)
FIG. 3 shows a longitudinal sectional view of the refrigerator in the third embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  A cooling chamber 303 is partitioned in the vertical direction in the back regions of the freezer compartment 301 and the vegetable compartment 302, and an evaporator 304 and a cooling fan 305 disposed on the top thereof are provided in the cooling chamber 303.

  In the lower space of the evaporator 304, a radiant heater 306 made of glass tube is provided as a defrosting device for defrosting frost adhering to the evaporator 304 and the cooling fan 305 during cooling.

  In addition, a defrost water drain mechanism comprising a defrost water tray 307 for receiving water defrosted by the radiant heater 306 and a drain pipe 308 for leading the defrost water connected to the defrost water tray 307 to the outside of the cabinet. 309 is installed so as to be substantially within the projection plane from above the cooling chamber 303. The drain pipe 308 passes through the bottom surface of the heat insulation box 310 and is drained to an evaporating dish 311 provided at the bottom of the bottom surface of the heat insulation box 310.

  Further, a concave portion 312 that is a space is provided on the rear surface of the bottom surface of the heat insulating box 310, and an evaporation fan 313 that is an evaporation promoting means for promoting evaporation of water that has been defrosted and accumulated in the evaporation dish 311 is installed. A planar condenser 314 is arranged on the bottom surface of the box 310. The condenser 314 typically includes a spiral fin capacitor in which a spiral fin is wound around a pipe, a plate capacitor in which a pipe is in contact with a metal plate, a wire capacitor, a fin coil capacitor, and the like.

  The evaporation fan 313 not only promotes evaporation of the defrosted water, but also improves the heat dissipation capability of the condenser 314 disposed on the bottom surface of the heat insulating box 310, and the temperature at which heat is exchanged by the condenser 314 is increased. High air is agitated by the evaporation fan 313 to prevent condensation on the outer surface around the freezer compartment 301 where the surface temperature tends to be relatively low.

  Here, the evaporator 304, the cooling fan 305, the radiant heater 306, the defrost water drain mechanism 309, the recess 312, and the evaporation fan 313 are located from above the region where the cooling chamber 303 and the heat insulating wall 315 that serves as the back of the cooling chamber 303 are combined. It is installed in the lower part so as to be almost within the projection plane.

  As described above, since the compressor 111 of the refrigeration cycle does not exist in the rear region of the freezer compartment 301, the above-described components are separated from above the cooling chamber 303 and the heat insulating wall 315 in the rear region of the freezer compartment 301 and the vegetable compartment 302. By storing almost in the projection plane, the inner surface of the freezer compartment 301 and the vegetable compartment 302 does not protrude, and a clean and convenient storage room can be formed.

  When the freezer compartment 301 and the vegetable compartment 302 are drawer-type storage rooms as in the present embodiment, the freezer compartment storage container 301a, which is the first drawer-type storage compartment storage container, and the second drawer-type storage The vegetable room storage container 302a, which is a room storage container, has substantially the same depth, and the shape of the storage container 302a does not bite into the rear of the freezer room 301, which corresponds to a conventional machine room. It can be made into a substantially rectangular parallelepiped shape.

  In accordance with this, the rails for moving the freezer compartment storage container 301a and the vegetable compartment storage container 302a back and forth are approximately equivalent in length.

  Further, if the height of the evaporator 304 is increased by making use of the height of the cooling chamber 303 and the depth of the evaporator 304 is shortened, the evaporator can be reduced in thickness while maintaining the cooling capacity. As a result, the thickness of the cooling chamber 303 can be reduced, the storage volume can be increased, the storage performance can be improved, and the usability can be improved.

  Further, if the parts related to the drawer structure are selected in accordance with the expansion of the depth in the storage room, the drawer allowance of the freezer compartment storage container 301a and the vegetable compartment storage container 302a can be increased, and the storage property at the time of the drawer can be increased. And visibility can be improved and usability can be improved.

  In the above example, the evaporation fan 313 is disposed in the recess 312, but the action of the evaporation fan 313 is not only the promotion of evaporation of defrost water accumulated in the evaporation dish 311, but also the action of promoting heat dissipation by forced convection of the condenser 314. May also be provided.

  Further, if a fin coil condenser (not shown) is used as the condenser 314 and is arranged so as to be accommodated in the recess 312, the condenser installation space on the bottom surface of the heat insulating box 310 is reduced and the internal volume is increased. This can increase the internal volume of the chamber 301. If the dimensions in the width direction of the heat insulating box 310 are utilized, the condenser 314 can be accommodated effectively, and the evaporation fan 313 is arranged in the longitudinal direction so as to function as a heat release promoting fan for the condenser 314. It is also possible.

  Further, by storing the welded portion of the condenser 314 and the welded portion of the condensing pipe (not shown) for promoting evaporation of the defrosted water drained to the evaporating dish 311 in the space in the recess 312. Workability can be improved.

  Furthermore, if the entire mechanism for promoting evaporation of defrost water including the evaporating dish 311 can be accommodated in the recess 312, the component arrangement of the lower region can be consolidated more compactly, and the degree of influence on the internal volume of the warehouse can be reduced. Can be less.

  In addition, the refrigerant circuit is switched in the case of a refrigerator having a high-pressure component of the refrigeration cycle such as a dryer (not shown) for removing moisture, or a refrigeration system in which a plurality of evaporators 304 are provided and switched appropriately. By storing the switching valve (not shown) in the recess 312 which is a space, workability and serviceability can be improved.

  In addition, the recess 312 can be used as a storage unit for an electronic control board (not shown) for controlling the operation of the refrigerator, or a storage unit or a connection unit for electrical wiring. There is no reduction.

  As described above, the lower region of the heat insulating box 310 is formed by providing the recess 312 as a space in the lower portion in the projection plane from above the region where the cooling chamber 303 and the heat insulating wall 315 on the back surface are combined to form a so-called utility space. Refrigeration cycle-related components, parts, fans, electrical wiring, control boards, and other related parts that need to be provided can be accommodated in the freezer compartment 301, vegetable room It is possible to provide an easy-to-use storage room that does not compress the interior side of the room 302 and has a clean feeling without reducing the internal volume.

  As described above, the refrigerator according to the present invention can improve the usability by expanding the depth of the lowermost storage chamber and at least the storage chamber immediately above it in a simple shape to improve the storage capacity. It can be widely applied to uses such as a refrigerator and a freezer having a plurality of storage rooms.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Vertical sectional view of the refrigerator in the second embodiment of the present invention Longitudinal sectional view of a refrigerator in Embodiment 3 of the present invention Vertical section of a conventional refrigerator

Explanation of symbols

101,310 Heat insulation box 103,201,301 Freezer room (first storage room)
104, 202, 302 Vegetable room (second storage room)
110, 312 Recessed portion 111 Compressor 112, 303 Cooling chamber 116, 301a Freezing chamber storage container (first drawer storage chamber storage container)
117,302a Vegetable room storage container (second drawer storage room storage container)
118,304 Evaporator 119,305 Cooling fan 120,306 Radiant heater (defrosting device)
121,307 Defrosted water tray 122,308 Drain pipe 123,309 Defrosted water drainage mechanism 203 First cooling chamber 204 First evaporator 208 Second evaporator 313 Evaporation fan (forced ventilation fan)
314 Condenser 315 Insulation wall

Claims (8)

A plurality of storage chambers are defined in a heat insulating box having an open front, a compressor of a refrigeration cycle is disposed on the top surface of the heat insulating box, and the interior of the cooling chamber partitioned in the back region of the lowest storage chamber The evaporator of the refrigeration cycle is accommodated in the vertical direction, and connected to the defrosting device disposed at the lower part of the evaporator, the defrosting water tray for receiving the defrosted water by the defrosting device, and the defrosting water tray A defrost water drainage mechanism configured with a drainage pipe formed so as to be substantially contained within a projection surface from above the cooling chamber, and heat insulation of the heat insulating box constituting the cooling chamber and the back surface of the cooling chamber A concave portion serving as a storage space is provided in a lower part of the defrost water drainage mechanism, which is substantially in a projection plane from above the wall, and the defrost water drainage mechanism is provided in the concave portion without providing the compressor. Evaporation Promoting Evaporation of Defrosted Water Collected in an Evaporating Dish for Accumulating Defrosted Water The advance means is provided to obtain a substantially parallelepiped shape inside of the storage compartment of the lowermost refrigerator. The lowermost storage chamber is a first storage chamber, and a second storage chamber partitioned by an insulating partition wall is provided above the first storage chamber, and the first storage chamber and the second storage chamber are provided. The refrigerator according to claim 1, wherein the cooling chamber is partitioned in a vertical direction across a back surface of the chamber, and the first storage chamber and the second storage chamber are formed in a substantially rectangular parallelepiped shape. 2. The lowermost storage chamber and / or the upper storage chamber of the lowermost storage chamber is a drawer-type storage chamber provided with a drawer door, and the storage container pulled out by the drawer door has a substantially rectangular parallelepiped shape. Or the refrigerator of 2. Said evaporator including a rear region of the heat-insulating partition wall is disposed across said second storage chamber and the first storage compartment, the evaporator than to place the cooling fan to the space above claim 2 or 3. The refrigerator according to 3 . The refrigerator as described in any one of Claim 1 to 4 which used the condensation piping of the condenser of the refrigerating cycle for the said evaporation promotion means. The refrigerator according to any one of claims 1 to 5, wherein a forced draft fan is used as the evaporation promoting means. The refrigerator according to claim 6, wherein heat radiation of the condenser of the refrigeration cycle is promoted by forced convection of the forced draft fan. The refrigerator according to any one of claims 1 to 7, wherein the entire evaporating dish and the evaporation accelerating means are accommodated in the recess.

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