JP4375220B2 - refrigerator - Google Patents

Description

  The present invention simplifies the arrangement of cooling air passages by the arrangement configuration of the refrigeration cycle such as a compressor and an evaporator, and prevents the cooling capacity from being lowered due to frost adhering to the evaporator, thereby effectively utilizing the internal volume of the storage room. It is related with the refrigerator which aims at.

  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. A refrigerator for storing a high-pressure side component such as the above has been proposed (see, for example, Patent Document 1).

  Further, in order to secure the depth dimension of the storage chamber located in the front part of the cooling chamber in which the evaporator is accommodated, the evaporator is provided with a return air path for cooling the plurality of storage chambers and returning the return air containing moisture. There has been proposed a refrigerator having an air passage configuration disposed on the side surface of the door (see, for example, Patent Document 2).

  FIG. 4 shows a longitudinal sectional view of a conventional refrigerator described in Patent Document 1, and FIG. 5 shows a perspective view of a cooling chamber of the refrigerator.

  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 provided with two drawer-type freezer compartment drawer doors 6a and 6b that can be easily taken out in consideration of storability and convenience. A vegetable room drawer door 7 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 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.

  Further, as shown in FIG. 5, a guide plate 35 extends from the outlet of the return air passage 32 on the right side of the evaporator 31 to the left side of the lower part of the evaporator 31 between the defrosting heater 33 and the dew receiving tray 34. A duct-like space is formed between the guide plate 35 and the dew receiving tray 34. An opening 35 a is provided on the surface of the guide plate 35, and the return air 36 in the refrigerator compartment (not shown) is dispersed in the lower part of the evaporator 31 by the opening 35 a, and It mixes with the return air 37 from the freezer compartment (not shown) flowing in between and is uniformly sucked into the lower part of the evaporator 31.

Thereby, even if the depth dimension of the storage room located in the front part of the evaporator 31 is enlarged and the return air passage 32 of the refrigerating room (not shown) is arranged on the side surface of the evaporator 31, the humid refrigerating room (Not shown) It is possible to prevent clogging due to uneven frosting of the evaporator 31 by return air and to suppress a decrease in cooling performance.
JP 2001-99552 A Japanese Patent Application Laid-Open No. 11-183011

  However, in the conventional configuration, a guide plate 35 is provided between the defrosting heater 33 and the dew receiving tray 34 below the evaporator 31, and frost can be uniformly attached to the lower surface of the evaporator 31. The refrigeration chamber return air 36 that has come out of the return air passage 32 must pass through the guide plate 35 and the defrosting heater 33, and the miscellaneous matter of the guide plate 35 and the defrosting heater 33 becomes the air passage resistance and the refrigeration chamber. The air volume may be reduced.

  Further, frost can be uniformly attached to the lower surface of the evaporator 31, but when excessively humid return air is sucked into the evaporator 31, only the vicinity of the lower surface of the evaporator 31 is clogged, and the central portion of the evaporator 31 is clogged. The cooling capacity from top to bottom cannot be extracted.

  Further, since the guide plate 35 is provided below the defrosting heater 33, the radiation heat of the defrosting heater 33 is blocked by the guide plate 35 at the time of defrosting, so that the dew receiving tray 34 does not rise in temperature and remains as frost. Water leaks due to failure.

  Further, since a duct-like space is formed between the guide plate 35 and the dew receiving tray 34, the cooling chamber expands in the vertical direction. Depending on the arrangement of the cooling chamber, an evaporator and a cooling fan having a required size (see FIG. (Not shown) cannot be stored in a predetermined cooling chamber, and the cooling chamber extends to the back of the three storage chambers, and the sealing performance of the cooling chamber and the storage chamber becomes complicated.

  As described above, in the conventional configuration, the arrangement configuration of the refrigeration cycle is devised, the compressor 16 is removed from the region of the lowermost storage chamber, the storage volume and the storage capacity are improved, and the return air passage 32 is further connected to the evaporator 31. Even if the guide plate 35 prevents the uneven frost generated by arranging the return air passage 32 on the side surface of the evaporator 31 and suppressing the reduction of the storage volume due to the return air passage as much as possible. Disadvantages due to the provision of the plate 35 occurred, and there were problems such as air volume reduction and water leakage.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which raised storage capacity and storage property and prevented the fall of the cooling performance of the evaporator.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a compressor for a refrigeration cycle, a second storage chamber partitioned by a heat insulating partition wall at a lowermost first storage chamber and an upper portion of the first storage chamber. A refrigerator disposed in a region other than the rear of the storage chamber, wherein the first storage chamber and the first storage chamber are arranged in a vertical direction across the back surface of the first storage chamber and the back surface of the second storage chamber. The second storage chamber is provided with a cooling chamber partitioned by a partition wall, accommodates an evaporator of a refrigeration cycle having a large number of fins inside the cooling chamber in the vertical direction, and cools the first storage chamber. A first storage chamber return air passage for returning the first storage chamber return air to the front surface of the evaporator, and a return air for cooling the storage chambers other than the first storage chamber to the lower surface of the evaporator. It has a return air passage.

  In the refrigerator of the present invention, the compressor of the refrigeration cycle is placed in a region other than the rear of the first storage chamber at the bottom and the second storage chamber partitioned by an insulating partition wall above the first storage chamber. It is a refrigerator to be disposed, and is vertically arranged across the back surface of the first storage chamber and the back surface of the second storage chamber, and is partitioned from the first storage chamber and the second storage chamber A cooling chamber partitioned by a wall is provided, and an evaporator of a refrigeration cycle having a large number of fins is accommodated in the cooling chamber in the vertical direction, and one return air that has cooled storage chambers other than the first storage chamber is provided. A return air passage is provided for returning the portion from the portion where the fins at the central portion of the evaporator are thinned out.

  As a result, it is possible to prevent uneven frost due to the arrangement of the return air passage on the side surface of the evaporator while suppressing the reduction of the storage volume due to the return air passage, and to secure the basic function of the refrigerator. Can do.

  The refrigerator of the present invention can expand the depth of the lowermost storage chamber and at least the storage chamber immediately above the storage chamber, the space shape of the storage chamber does not become a complicated shape, increases the storage capacity, and improves the storage performance. Usability can be improved, and furthermore, a decrease in cooling performance due to uneven frost can be suppressed.

According to the first aspect of the present invention, a plurality of storage chambers including a freezing chamber and a refrigeration chamber are formed in a heat insulating box having an open front surface, and a compressor for a refrigeration cycle is disposed on the top surface of the heat insulating box. to a refrigerator, said a cooling chamber which are partitioned by the partition wall and the freezing chamber while being disposed on the rear surface of the freezing chamber, or lower the evaporator of the refrigeration cycle having a plurality of fins to the inside of the cooling chamber housed in a direction, the conjunction provided on the front side of the freezing compartment return air path for the freezer compartment return air which has cooled the freezing chamber back into the evaporator before Symbol evaporator, return refrigerating compartment cooling the refrigerating compartment air The inlet of the refrigerator return cold air and the freezer return cold air into the evaporator is provided by providing a refrigerator return air passage for returning the refrigerant to the evaporator on the side surface and lower surface side of the evaporator. Can prevent uneven frost on the evaporator. It is possible to suppress the reduction of the retirement performance.

According to the second aspect of the present invention, a plurality of storage chambers including a freezing chamber and a refrigeration chamber are formed in a heat insulating box having an open front surface, and a compressor for a refrigeration cycle is disposed on the top surface of the heat insulating box. to a cooling chamber which are partitioned by the partition wall and the freezing compartment with a refrigerator is disposed on a rear surface of the freezing chamber, the vertical direction evaporator of the refrigeration cycle having a plurality of fins to the inside of the cooling chamber A refrigerating chamber return air passage for returning the refrigerating chamber return air that has cooled the refrigerating chamber to the evaporator, and has a portion where the fins at the central portion of the evaporator are thinned out as compared with other portions. By providing a part of the refrigerator return air path on the side surface and the lower surface side of the evaporator in a portion where the fins at the central part of the evaporator are thinned out, it is possible to prevent uneven condensation frost of the evaporator. A decrease in cooling performance can be suppressed.

According to a third aspect of the present invention, in the invention of the first or second aspect, the evaporator is configured such that the fin interval at the evaporator inflow portion of the return air is wider than the fin interval at the top of the evaporator. Therefore, it is possible to suppress a decrease in cooling performance due to clogging due to humming of the return air with high humidity at the inflow portion.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the evaporator is a return air for returning the return air that has cooled the storage chambers other than the first storage chamber to the evaporator. The fin spacing on the side of the passage is set wider than the fin spacing on the side where the return air passage is not provided, and the humid return air is near the side where the return air passage of the evaporator is provided. It is possible to prevent uneven frosting and suppress a decrease in cooling performance.

  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 according to Embodiment 1 of the present invention, and FIG. 2 shows a perspective view of a cooling chamber of the refrigerator according to the embodiment.

  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. It may be set by.

  The top surface portion of the heat insulation box 1 is provided with a stepped 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. A storage container 117 for a vegetable room is provided, and each storage container 116, 117 is provided in the front-rear direction by a rail (not shown) in the front-rear direction and a frame with a roller on which the storage containers 116, 117 are placed. It is supported movably.

  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 103 up to the first partition 113 serving as the front wall is formed to be 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 supply of low-temperature cold air is controlled by a damper device (not shown) or the like. 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.

  Here, the air cooled by the evaporator 118 by the operation of the cooling fan 119 is sent to the freezer compartment 103, the vegetable compartment 104, and the refrigerator compartment 102, and the vegetable compartment 104 and the refrigerator compartment 102 are connected by a damper device (not shown) or the like. Control the supply of cold air. The cold air that has cooled each storage chamber becomes humid air and is sucked into the evaporator 118 through the return air passage. The component parts constituting the cooling chamber 112 are mainly an evaporator 118, a cooling fan 119, a radiant heater 120 as a defrosting device, a discharge air passage for blowing cool air discharged from the cooling fan 119 to each storage chamber, and each storage chamber. The cooling air is a return air path for returning the air to the evaporator 118, and in order not to reduce the depth dimension of the storage chamber located in front of the cooling chamber 112, the component parts constituting the cooling chamber 112 are changed. The point is to arrange them neatly and make the cooling chamber 112 thin without arranging them in the depth direction.

  A refrigeration chamber return air passage 126 for returning the humid refrigeration chamber return air 125 from the refrigeration chamber 102 and the vegetable chamber 104 to the evaporator 118 is disposed on the side surface of the evaporator 118, and the refrigeration chamber return air 125 is supplied to the evaporator 118. It flows in from the lower surface. The freezer return air 127 flows into the evaporator 118 through a suction port 128 provided on the front surface of the evaporator 118.

  Thus, by dividing the inlet of the refrigerator compartment return air 125 and the freezer compartment return air 127 to the evaporator 118, the evaporator 118 can be uniformly frosted, and the doors of each storage compartment are frequently opened and closed. Under conditions where the ambient temperature and humidity are high, the bottom surface of the evaporator 118 is covered with frost so that the air does not pass, and the amount of circulated cool air is reduced and the cooling capacity is prevented from being deteriorated. can do.

  Further, the interval between the fins 129 on the lower surface of the evaporator 118 into which the refrigerating room return air 125 flows and the distance between the fins 129 on the front surface of the evaporator 118 into which the freezer return air 127 flows are determined by the distance between the fins 129 above the evaporator 118. By enlarging, it is possible to prevent clogging from occurring even if return air that is humid flows into the evaporator 118, and deterioration of the cooling capacity.

  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.

  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.

(Embodiment 2)
FIG. 3 shows a perspective view of the cooling chamber 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.

  In the evaporator 118, the fins 129 that perform heat exchange are divided into upper and lower parts, and the fins 129 near the center are thinned out as compared with the conventional one, and the fins 129 are thinned out near the center. The heat transfer tube 130 is exposed.

  In the above-described configuration, the freezer return air 127 that has cooled the freezer compartment 103 is returned from the lower surface of the evaporator 118, and the refrigerator compartment return air passage 126 of the vegetable compartment 104 and the refrigerator compartment 102 formed on the side surface of the evaporator 118. From the vicinity of the center where the fins 129 of the evaporator 118 are thinned out by returning a part of the return air 131 of the refrigeration room return air 125 of the vegetable compartment 104 and the refrigeration compartment 102, a larger amount of moisture is obtained compared to the freezer compartment 103. The refrigerating room return air 125 of the vegetable room 104 and the refrigerating room 102 included is frozen on the lower surface of the evaporator 118 and easily covered with frost, and the cooling capacity due to a decrease in the air volume can be prevented from being easily lowered.

  Thereby, the depth dimension of the store room located in the front part of the cooling chamber 112 can be secured to the maximum without impairing the cooling performance that is the basic function of the refrigerator.

  Further, the interval between the fins 129 on the lower surface of the evaporator 118 into which the refrigerating room return air 125 and the freezing room return air 127 flow, and the fins 129 at the center of the evaporator 118 into which a part of the return air 131 of the refrigerating room return air 125 flows. Is larger than the gap between the fins 129 at the top of the evaporator 118 to prevent clogging from occurring even when return air with high humidity flows into the evaporator 118, and deterioration of the cooling capacity. it can.

  As described above, the refrigerator according to the present invention prevents the clogging of the evaporator and cools it while 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. The performance can be prevented from being lowered, and can be widely applied to applications such as refrigerators and freezers having a plurality of various storage rooms.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The perspective view of the cooling chamber of the refrigerator in Embodiment 1 of this invention The perspective view of the cooling chamber of the refrigerator in Embodiment 2 of this invention Vertical section of a conventional refrigerator A perspective view of a cooling room of a conventional refrigerator

Explanation of symbols

101 Insulation box 103 First storage room (freezer room)
104 Second storage room (vegetable room)
111 Compressor 112 Cooling chamber 114 Insulation partition wall (second partition)
118 Evaporator 125 Return air from storage rooms other than the first storage room (refrigeration room return air)
126 Return air path of the storage room other than the first storage room (refrigeration room return air path)
127 Return air of the first storage chamber (freezer return air)
128 Return channel (suction port) of the first storage room
129 Fin

Claims (4)

A refrigerator in which a plurality of storage chambers including a freezer compartment and a refrigeration compartment are partitioned in a heat insulation box having an open front, and a compressor of a refrigeration cycle is disposed on a top surface portion of the heat insulation box , wherein the freezer compartment A cooling chamber which is disposed on the back surface of the refrigeration chamber and is partitioned by a partition wall from the freezing chamber , and accommodates an evaporator of a refrigeration cycle having a number of fins inside the cooling chamber in the vertical direction, chilled with provided freezer compartment return air path for cooling the freezer compartment return air back into the evaporator to the front side of the front Symbol evaporator, to return the cooled refrigerating compartment return air the refrigerator compartment to the evaporator The refrigerator which divided the inlet_port | entrance to the said evaporator of the refrigerator compartment return cold air and the freezer compartment return cold air by providing a chamber return air path in the side surface and lower surface side of the said evaporator . Front were defining a plurality of storage compartments including a and the opened insulating box freezer compartment in the body refrigerating chamber, a refrigerator to dispose the compressor of the refrigeration cycle to the top surface portion of the heat-insulating main body of the freezing chamber A cooling chamber disposed on the back and partitioned by a partition wall from the freezing chamber is provided, and stores an evaporator of a refrigeration cycle having a large number of fins inside the cooling chamber in the vertical direction, and the center of the evaporator There is a part where fins of the part are thinned out compared with other parts, and a refrigerator return air passage for returning the refrigerator return air that has cooled the refrigerator compartment to the evaporator is provided on the side surface and the lower surface side of the evaporator. And a refrigerator provided with a part of the return air path of the refrigerator compartment in a portion where the fins at the center of the evaporator are thinned out.   The refrigerator according to claim 1 or 2, wherein the evaporator has a fin interval that is wider than a fin interval at the uppermost part of the evaporator.   The evaporator has a fin interval on the return air passage arrangement side for returning the return air that has cooled the storage chambers other than the first storage chamber to the evaporator, on the side where the return air passage is not provided. The refrigerator according to claim 1 or 2, wherein the fin interval is wider than the fin interval.

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