JP2011208834A - Refrigerator - Google Patents

Abstract

An object of the present invention is to provide a refrigerator having a refrigerator compartment that can achieve both temperature equalization and high humidity at low cost.
A cooling chamber in which a cooler 110 is installed, a blower that blows cool air from the cooling chamber, a discharge duct that guides cool air blown from the cooler 110 to a storage chamber, and a discharge from the storage chamber It has a suction duct for guiding cool air to the cooler 110, and a water receiving portion installed at a position where the cooling air flows at the lower end of the cooling panel 115a, and the discharge duct is a cooling made of a material having good thermal conductivity. Since the panel 115a is exposed to the storage room, the cooling panel 115a having good thermal conductivity is provided in a part of the cold room duct 114 that guides the cooling air that cools the cold room 102. Since the refrigerator is exposed to the refrigerator compartment 102, the temperature can be equalized by circulating the cooling air in the refrigerator compartment 102 and the humidity can be increased by evaporation of moisture in the condensed cooling panel 115a at low cost.
[Selection] Figure 1

Description

  The present invention relates to a refrigerator that achieves both temperature equalization and high humidity in a storage room.

  In recent years, there has been a method in which a refrigerator dedicated to a refrigerator compartment is provided in a refrigerator compartment as a method for improving the freshness of food by increasing temperature and humidity in a refrigerator (see, for example, Patent Document 1).

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 5 is a schematic side sectional view for explaining a refrigerator according to the prior art.

  In FIG. 5, the refrigerator 1 is arrange | positioned in order of the refrigerator compartment 3, the freezer compartment 5, and the vegetable compartment 7 from the upper direction, and is made in the independent warehouse by each partition walls 9 and 11. In FIG.

  The refrigerator compartment 3 allows foods and the like to be taken in and out by opening a hinge (not shown) attached to the open / close door 13 as a fulcrum. Inside the open / close door 13, there is provided a door pocket 15 in which containers such as cans, bottles and the like that are not adversely affected even by indirect cooling in which cold air is directly applied to the upper, middle, and lower stages.

  A cold air circulation passage 21 that also serves as the inner wall surface of the refrigerator compartment 3 is formed by a planar cooling plate 19 that serves as the first cooler 17 for the refrigerator compartment at the rear of the refrigerator compartment 3.

  The planar cooling plate 19 has a shape in which a refrigerant pipe (not shown) through which a refrigerant flows is disposed between the planar plates, and both surfaces are planar cooling surfaces.

  Therefore, the air passes through the cold air circulation passage 21 formed by the planar cooling plate 19 so that heat exchange is performed, and the air in the passage 21 becomes cold air. Cooling is performed directly by radiant heat.

  The cold air circulation passage 21 has a fan 25 for blowing air and is formed in a shape continuous over the ceiling area a and the rear wall area b of the refrigerator compartment 3. Of these, the planar cooling surface is the rear wall region b formed by the planar cooling plate 19, which is the direct cooling region described above.

  The ceiling region a of the cool air circulation passage 21 is formed by a duct panel 27, and the end opening is a blowout port 29 that blows cool air toward the uppermost door pocket 15. The cold air blown out from the air outlet 29 passes through the middle and lower door pockets 15 as indicated by arrows, and repeats circulation returning from the cold air return port 31 to the cold air circulation passage 21 again.

  On the other hand, the freezer compartment 5 is composed of first and second freezer compartments 5a and 5b, and is a drawer type in which the storage container 5c can be pulled out. Each fan 35 is provided. The second cooler 33 is arranged in parallel with the first cooler 17 via a throttling device through which a refrigerant flows simultaneously by a three-way valve (not shown), and by a compressor 43 and a condenser provided in the machine chamber 41. A refrigeration cycle in which the refrigerant discharged from the compressor 43 circulates is configured. Therefore, after the cold air exchanged in the second cooler 33 is blown out from the outlets 47 to the first and second freezing chambers 5a and 5b by the fan 35, the second cooler 33 is returned from the return port 49 again. The circulation to return to is repeated. On the other hand, the vegetable compartment 7 is a drawer type in which the storage container 7a can be withdrawn, and cooling of the inside is performed by a part of the cold air blown into the second freezing compartment 5b. .

  According to the refrigerator 1 configured as described above, the cold air heat-exchanged by the planar cooling plate 19 serving as the cooler 17 when the air passes through the cold air circulation passage 21 is provided to the open / close door 13 from the air outlet 29. The door pocket region is cooled by blowing toward the uppermost door pocket 15 and indirectly cooling with cold air.

  On the other hand, the inside of the refrigerator compartment 3 can be cooled in a well-balanced manner by combined cooling in which the inside of the refrigerator is cooled by direct cooling by radiant heat from the planar cooling plate 19.

JP 2008-39296 A

  However, the conventional configuration requires two low-pressure side refrigerant circuits to which the cooler is connected. Therefore, in addition to the large number of parts, the amount of refrigerant increases and the cost increases.

  Moreover, since the cooler 17 for the refrigerator compartment 3 has a planar shape, the heat exchange area is smaller than that of the fin and tube, and the temperature of the cooler 17 is required to obtain the same heat exchange amount as that of the fin and tube heat exchanger. Need to be low. Although the temperature in the refrigerator compartment 3 is higher than that in the freezer compartment 5, the temperature of the cooler 17 must be lowered due to the influence of the heat exchange area, so that the refrigerant flows through the cooler 17. In the case where the refrigerator compartment 3 is being cooled, there is a possibility that the amount of frost on the surface of the cooler 17 increases and the interior of the refrigerator is reduced in humidity. Furthermore, when the refrigerant is not flowing through the cooler 17, frost formation on the cooler 17 may melt and fall below the cooler 17 or may accumulate on the partition wall 9, and moisture remains for a long time. It is unsanitary because it causes the propagation of various bacteria.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a cooling chamber in which a cooler is installed, a storage chamber having a refrigeration temperature zone, a blower for blowing cool air from the cooling chamber, and the cooler. Installed at a discharge duct for guiding the cool air blown to the storage chamber, a suction duct for guiding the cool air discharged from the storage chamber to the cooler, and a position where the cooling air flows at the lower end of the cooling panel The discharge duct is composed of a cooling panel made of a material having good thermal conductivity, and the cooling panel is exposed to the storage room, so that the storage room is cooled, A part of the cold heat of the cold air passing through the discharge duct cools the storage room through the cooling panel, and a part of the cold air circulates in the storage room for cooling. At this time, since a part of the cooling of the storage room is cooled by radiation from the cooling panel, it is possible to cool by suppressing moisture transpiration from food as compared with cold air ventilation.

  Furthermore, since the cooling panel is cooled below the storage room temperature by the cold air, a part of the moisture in the air in the storage room is condensed and frosted on the surface of the cooling panel, and a part is carried to the cooler along with the cold air circulation. . When the cooling of the storage chamber is stopped, the cold air circulation is stopped, and moisture that has condensed or frosted on the cooling panel is released into the storage chamber and the humidity in the storage chamber increases.

  Furthermore, since excessive dew condensation water is stored in the water receiving part, it can be stored smoothly.

  According to the present invention, the refrigerant circuit on the low-pressure side may be one circuit, and the temperature of the low-temperature side refrigerant is reduced by using the low-temperature cold air as the heat transfer medium and cooling the storage chamber through the cooling panel for a part of the cold air. Therefore, the cost can be reduced as compared with the prior art, and the amount of refrigerant can be reduced.

Side surface sectional drawing of the refrigerator in Embodiment 1 of this invention Discharge duct diagram of the refrigerator in the first embodiment of the present invention The cross-sectional enlarged view of the side cross-sectional shape (A-A ') of the cooling panel in Embodiment 1 of this invention Side surface sectional drawing of the refrigerator in Embodiment 2 of this invention Overview side sectional view explaining a refrigerator according to the prior art

  The first invention is a cooling chamber in which a cooler is installed, a storage chamber composed of a refrigeration temperature zone, a blower that blows cool air from the cooling chamber, and the cool air blown from the cooler is guided to the storage chamber. A discharge duct, a suction duct for guiding the cool air discharged from the storage chamber to the cooler, and a water receiving portion installed at a position where cooling air is passed at the lower end of the cooling panel, Since the discharge duct is composed of a cooling panel made of a material having good thermal conductivity, and the cooling panel is a refrigerator exposed to the storage room, temperature equalization and high humidity can be achieved at low cost. .

  In the second aspect of the invention, the shape of the cooling panel is uneven in a direction perpendicular to the traveling direction of the discharged cold air.

  As a result, the surface area of the radiation cooling panel that cools the storage chamber can be increased, so that the cooling area for ensuring the same cooling capacity can be reduced and the cost can be reduced. Furthermore, by storing the moisture that has condensed or frosted at the concave and convex portions exposed on the inner side of the warehouse, it is possible to secure the amount of moisture released into the storage chamber when cooling is stopped, and to further increase the humidity in the storage chamber.

  In the third aspect of the invention, the cooling panel is disposed so as to be inclined toward the storage chamber with respect to the traveling direction of the discharged cold air.

  As a result, the radiant cool air from the cooling panel is lower than the temperature in the storage room, so the convection naturally falls from the upper part to the lower part in the vertical direction, but the upper part is lower than the upper part of the cooling panel that has a large temperature difference from the storage room temperature. The heat exchange efficiency decreases because the temperature difference from the storage room temperature becomes smaller due to the influence of cold air from the inside, but by placing the cooling panel tilted toward the storage room side, it can be less affected by the cold air from above Therefore, a temperature difference from the storage room temperature is ensured, and heat exchange can be performed at the lower part of the cooling panel without causing a decrease in efficiency.

  4th invention arrange | positions a heat insulating material between a cooling panel and a discharge duct, and the thickness of a heat insulating material is made into the dimension which changed thickness with respect to the advancing direction of the said discharge cold air.

  Thereby, since the temperature distribution on the surface of the cooling panel can be made uniform, the temperature distribution and the humidity distribution can be made more uniform even in the storage compartment partitioned by a plurality of storage compartment shelves.

  In the fifth aspect of the invention, the depth of the water receiving portion disposed at the lower end of the cooling panel is set so that the vicinity of the suction port of the suction duct is deepest.

  This makes it possible to efficiently circulate excess moisture that does not evaporate due to moisture condensed on the cooling panel to the cooler. Even when high-humidity food is introduced into the room, it is possible to suppress the propagation and contamination of germs caused by the downward movement or falling and collecting on the partition wall.

  6th invention sprays the water stored by the water receiving part in the storage chamber with the spraying apparatus.

  As a result, minute water particles are released from the spraying device into the storage chamber, so that the amount of water in the storage chamber increases and the humidity rises, thereby reducing the freshness deterioration of food stored in the storage chamber. it can. In addition, since the amount of water circulated to the cooler through the suction duct can be reduced, the amount of frost adhering to the cooler can be reduced, and the performance deterioration due to the frosting of the cooler can be suppressed, so that the operation time of the refrigerator and the outside air Since it is possible to shorten the defrosting time of the cooler determined by the temperature or the like and to extend the defrosting cycle, the actual power consumption can be reduced. In this case, furthermore, in the case of a refrigerator using a defrost heater, for example, at the time of defrosting, it is possible to reduce the heat effect of the heater to the inside of the refrigerator, so that the deterioration of the preservation of food and the cooling operation after defrosting are shortened. It is also possible to reduce the amount of power consumption due to.

  In the seventh invention, since the cooling panel is made of an aluminum material, in addition to enabling temperature equalization and high humidity at a low cost, the discharge duct can be attached because of its light weight. It is easy and the mounting structure can be simplified and the number of mounting steps can be reduced.

  In the eighth aspect of the invention, since the cooler is an evaporator of a refrigeration cycle and the refrigerant of the refrigeration cycle is a flammable refrigerant, in addition to low cost, the refrigerant charging amount can be reduced as compared with the conventional case, and the flammability is reduced. In the unlikely event that the refrigerant leaks, the amount of leakage is reduced, and the temperature can be increased and the humidity can be increased while improving safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that detailed descriptions of parts that are the same as those in the conventional configuration and that have no difference are omitted. Further, the present invention is not limited to the embodiments.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view of a refrigerator according to Embodiment 1 of the present invention.
FIG. 2 is a discharge duct diagram of the refrigerator according to Embodiment 1 of the present invention.
FIG. 3 is a side cross-sectional shape (AA ′) of the cooling panel according to Embodiment 1 of the present invention.

  As shown in FIGS. 1 to 3, the refrigerator main body 100 is foamed between an outer box made of metal (for example, an iron plate) and an inner box made of hard resin (for example, ABS), and an outer box and an inner box. A heat-insulated cabinet 101 made of filled urethane heat-insulating material. Inside the heat-insulated cabinet 101, the temperature is controlled from the upper part in the refrigeration temperature zone normally set at 1 to 5 ° C, with the temperature not frozen for refrigerated storage as the lower limit. A refrigerated room 102, a chilled room 103 that is adjusted to a temperature suitable for preserving fresh food such as meat and fish, and is normally adjusted in a chilled temperature range set at 1 to 3 ° C., and a temperature controlled at a freezing temperature. Freezing compartments 104 are provided, and each compartment is partitioned by an upper thermal insulation barrier 105 and a lower thermal insulation barrier 106. The freezer compartment 104 is normally set at −22 to −18 ° C. for frozen storage, but may be set at a low temperature of −30 to −25 ° C., for example, to improve the frozen storage state. In the present embodiment, the chilled room 102 is a room sandwiched between the refrigerator compartment 102 and the freezer compartment 104, but it may be a variable temperature room that can change the temperature according to the actual usage. In the case of a variable temperature room, it can change from a refrigeration temperature zone to a freezing temperature zone.

  Each room is provided with a refrigerator compartment door 107, a chilled compartment door 108, and a freezer compartment door 109, and is sealed with a packing attached to each door so that no outside air flows in when the door is closed.

  The cooling chamber is provided with a cooler 110 that cools the inside of the refrigerator main body 100. When any of the refrigeration chamber 102, the chilled chamber 103, and the freezing chamber 104 reaches a predetermined temperature or higher, cooling starts, and the compressor 111 and the blower Operation 112 is started. A refrigeration cycle (not shown) in which a refrigerant is sealed is functionally activated by starting operation of the compressor 111, the cooler 110 is cooled, and air passing through the cooler 110 is cooled by the blower 112. In recent years, a flammable refrigerant such as an isobutane refrigerant is often used as the refrigerant for environmental protection.

  The material of the cooler 110 is aluminum or copper.

  The blower 112 is disposed in the vicinity of the cooler 110 (for example, the upper space), and blows the cold air generated by the cooler 110 to each storage room in the refrigerator by a forced convection method.

  The blower 112 is usually arranged directly on the cooler cover or the inner box, but it is arranged on the lower heat insulation barrier 106 assembled before or after foaming of the urethane heat insulating material, and manufactured by blocking the parts. Cost can also be reduced.

  Further, a radiant heater (not shown) made of a glass tube is provided in a lower space of the cooler 110 in the cooling chamber as a defrosting device that defrosts frost attached to the cooler 110 and the blower 112 during cooling. . The defroster is not particularly specified, and a pipe heater in close contact with the cooler 110 may be used in addition to the radiant heater.

  Next, when the refrigerator compartment 102 reaches a predetermined temperature or higher, the refrigerator damper 113 is opened, and the cooling air flows to the refrigerator compartment duct 114 and passes through a portion constituted by the cooling panel 115a made of aluminum. Discharge from the discharge 116 to the refrigerator compartment 102. At this time, the cooling panel 115 a is cooled by the cooling air, and the cooling air flows to the refrigeration discharge 116 while being raised in temperature and discharged to the refrigeration chamber 102. A part of the humidity in the refrigerator compartment 102 is condensed in the cooling panel 115a because the cooling panel 115a is in the coldest state, and a part of the humidity is circulated from the suction port 124 to the cooler 110 together with the cooling air. Frost on. The cooling air discharged to the refrigerator compartment 102 is dry air dehumidified by the cooler 110, but moisture condensed on the cooling panel 115a is evaporated to keep the refrigerator compartment 102 at an appropriate humidity.

  Further, a part of the excess moisture that does not evaporate due to moisture condensed on the cooling panel 115a flows on the surface of the cooling panel 115a and is stored in the water receiving portion 115b. The water receiving part 115b is installed in the position where the cooling air of cooling passes in the vicinity of the suction inlet 124.

  And the water stored in the water receiving part 115b is gradually evaporated by the ventilation of the cooling air flowing through the water surface, and circulates and adheres to the cooler 110 together with the cooling air.

  In addition, when there is much quantity of water stored in the water receiving part 115b, you may provide the drain which discharges water outside.

  After that, when the refrigerator compartment 102 is cooled to a predetermined temperature, the compressor 111 and the blower 112 are stopped, the refrigerator damper 113 is closed and sealed so that there is no ventilation from the cooler 110, and the cooling is stopped.

  When the cooling is stopped, moisture condensed on the cooling panel 115a evaporates until the humidity in the refrigerator compartment 102 is saturated, and the refrigerator compartment 102 is humidified.

  When the chilled chamber 103 reaches a predetermined temperature or more, the chilled damper 117 is opened, and the cooling air flows to the chilled chamber duct 118 to be discharged from the chilled discharge 119 to the chilled chamber 103 to be cooled, and a suction port (not shown) It circulates to the cooler 110 through.

  The freezer compartment 104 is cooled when the freezer compartment 104 reaches a predetermined temperature or higher and when the refrigerator compartment 102 and the chilled compartment 103 are cooled.

  At this time, the cooling air is discharged from the freezer discharge 120 to the freezer compartment 104 and circulated from the freezer inlet 121 to the cooler 110.

  From the above, it is possible to achieve temperature equalization and high humidity in the refrigerator compartment 102 at a low cost, and it is possible to smoothly treat excess dew condensation water.

  In addition, since the surface area of the cooling panel 115a for radiation for cooling the storage chamber can be increased by making the shape of the cooling panel 115a concavo-convex in the direction perpendicular to the traveling direction of the discharge cold air, in order to ensure equivalent cooling capacity The cooling area can be reduced and the cost can be reduced. In particular, the surface of the cooling panel exposed to the inside of the refrigerator is made into a concave shape like an arc, taking into account the surface tension of water, so that moisture that has condensed or frosted is stored in the storage chamber when cooling is stopped. It is possible to secure the amount of moisture to be generated and to further increase the humidity in the storage chamber.

  Further, since the heat transfer coefficient between the cooling panel 115a and the cooling air flowing through the refrigerator compartment duct 114 can be increased by the effect of generating eddy currents due to the uneven shape on the surface of the cooling panel 115a on the surface on the refrigerator compartment duct 114 side, The heat exchange efficiency of 115a is improved and the performance can be improved. As a result, the operation time of the refrigerator compartment 102 can be shortened, which is effective in reducing power consumption.

  In addition, the unevenness of the shape of the cooling panel 115a is effective for improving the strength of the flat plate, so that the same strength can be ensured and the thickness can be reduced, and the parts can be attached. It is effective in improving yield because it has the effect of suppressing deformation of parts due to stress due to time and vibration during transportation.

  Further, by disposing the cooling panel 115a so as to be inclined toward the storage room side, the refrigerated room 102 can be efficiently cooled by the radiated cool air. Since the radiant cool air generated by the cooling panel is lower than the temperature in the storage room, the convection naturally falls from the upper part to the lower part in the vertical direction, but the lower part is lower than the upper part of the cooling panel that has a large temperature difference from the storage room temperature. The heat exchange efficiency is reduced because the temperature difference from the storage room temperature is reduced due to the influence of the cool air from the upper part, but the cooling panel 115a is inclined to the storage room side, and is affected by the cold air from the upper part. Therefore, the temperature difference from the storage room temperature can be secured, and heat can be exchanged at the lower portion of the cooling panel 115a without causing a decrease in efficiency. In the present embodiment, the cooling panel 115a has an inclination of 1.5 ° with respect to the direction in the storage chamber. When there is a large amount of water condensed on the surface of the cooling panel 115a, the water is received in the water receiving portion 115b at the lower part of the cooling panel 115a. Normally, even when the cooling panel 115a is tilted, the surface of the panel is covered when dropped due to the surface tension of water. However, when the inclination is increased, it may be dropped directly on the upper heat insulation barrier 105 below the refrigerator compartment 102, so that the angle is preferably 5 ° or less.

  Further, by disposing a heat insulating material 122 having a thickness changed in a direction parallel to the traveling direction of the cooling air generated by the cooler 110 between the cooling panel 115a and the discharge duct 114, the surface of the cooling panel 115a is arranged. Since the temperature distribution can be made uniform, the temperature distribution and the humidity distribution can be made more uniform even in the refrigerator compartment 102 partitioned by a plurality of storage room shelves. As the heat insulating material 122, foamed polystyrene having high heat insulating performance, low cost and easy moldability is often used. However, since the minimum thickness of foamed polystyrene is about 5 mm depending on the size of the molded beads, polyethylene and closed foamed urethane foam may be combined in order to obtain a finer temperature distribution performance.

  In the present embodiment, polystyrene foam is used as the material of the heat insulating material 122, the size of the cooling panel 115a having a low cooling air temperature is 15 mm at the lower portion, and the upper portion having a higher temperature is 5 mm, and the distance is linearly changed. It has a different shape.

  Moreover, the water receiving part 115b is arrange | positioned in the horizontal direction so that more excess water can be ensured in the lower part of the cooling panel 115a. In addition, since the suction port 124 can be arranged at the upper part of the water receiving part 115b to increase the speed of the cooling air passing through the upper surface of the water stored in the water receiving part 115b, it efficiently evaporates and the amount of water vapor is increased. The generated cooling air can be circulated to the cooler 110.

  Furthermore, by making the depth of the water receiving portion 115b in the vicinity of the suction port 124 deeper than other portions, water can be stored in the portion where the cooling wind speed is high, so that excess water is efficiently removed. It can evaporate. In the present embodiment, the depth of the water receiving portion 115b has an inclination angle of 5 ° so that it flows to the deepest portion without any water stagnation with respect to other portions.

  Under the humid climate conditions peculiar to Japan, when the door is opened, the warm and humid air of the outside air flows into the cabinet, and the inside of the cabinet becomes air with a large amount of moisture. Even when the doors are often opened and closed under such high temperature and high humidity conditions, or even when high humidity food such as pots that Japanese people like to eat are put into the storage room, the water receiving portion 115b is moved downward. It is possible to suppress the propagation of bacteria and dirt due to falling and collecting on the partition wall.

  Further, a spray device 123 is disposed in the vicinity of the water receiving portion 115b, and the water stored in the water receiving portion 115b is sprayed into the storage chamber, whereby the amount of water in the storage chamber is increased and the humidity is increased and stored in the storage chamber. Deterioration of freshness of foods can be reduced. Conventionally, in the case of a refrigerator without an independent vegetable compartment, it is often convenient to arrange a vegetable storage container at the bottom of the refrigerator compartment 102, but the spray destination of the spraying device 123 is only in the vegetable storage container or in the refrigerator compartment 102. Is very effective in suppressing the deterioration of freshness of vegetables stored in the vegetable storage container.

  The spray device 123 is effective when the size of the water particles is very small, for example, 10-9 level particles or 10-12 level particles. Further, since the moisture replenishment portion of the spray device 123 is the deepest portion of the water receiving portion 115b, moisture can be secured stably, so that the sustainability of the effect can be increased.

  Furthermore, since the amount of moisture circulated to the cooler through the suction duct can be reduced due to the reduction of moisture in the warehouse by the spray device 123, the amount of frost adhering to the cooler 110 can also be reduced, and the frost formation of the cooler 110 can be reduced. It is possible to suppress the performance deterioration at the same time. In addition, it is possible to shorten the defrosting time of the cooler 110 that is calculated and determined based on the operating time of the refrigerator, the outside air temperature, and the like, and it is possible to extend the defrosting cycle, so that the power consumption can be reduced. In this case, furthermore, in the case of a refrigerator using a defrosting heater at the time of defrosting, since the heat influence of the heater to the inside of the cabinet can be reduced, it is possible to suppress the deterioration of the freshness of the food due to the rise in the inside temperature and to remove the defrosting. The power consumption can be reduced by shortening the subsequent cooling operation.

  Further, since the cooling panel 115a is made of an aluminum material, the discharge duct can be easily mounted, and the mounting structure can be simplified and the number of mounting steps can be reduced.

  Furthermore, isobutane, which is a flammable refrigerant with a low global warming potential, is used as a refrigerant in recent refrigeration cycles from the viewpoint of global environmental conservation. This hydrocarbon, isobutane, has a specific gravity of about twice that at normal temperature and atmospheric pressure (at 2.04 and 300K) compared to air. As a result, the refrigerant charge amount can be reduced as compared with the conventional case, the cost is low, and the leakage amount when the flammable refrigerant leaks is reduced, thereby improving the safety.

(Embodiment 2)
FIG. 4 is a side cross-sectional view of the refrigerator in the second embodiment of the present invention.

  In addition, the same code | symbol is shown about the same structure as background art.

  In FIG. 4, the water receiving part 215b at the lower part of the cooling panel 215a is arranged inside the cooling panel 215a and the refrigerator compartment duct 214, so that the design surface is clean without protruding into the cabinet.

Furthermore, since all the cooling air containing the water vapor evaporated from the water stored in the water receiver 215b is circulated to the cooler 210, it can be processed efficiently.
In addition, with respect to the inner surface of the cooling panel 215a, the surface positioned below the water receiving portion 215b is positioned more inside the storage, so that water dripped from the cooling panel 215a can be reliably received by the water receiving portion. 215b.

  As described above, the refrigerator according to the present invention can achieve both temperature equalization and high humidity in a refrigerator compartment at low cost and can be used for a household refrigerator or the like.

110 Cooler 112 Blower 115a Cooling panel 115b Water receiving part

Claims (8)

A cooling chamber in which a cooler is installed, a storage chamber composed of a refrigeration temperature zone, a blower that blows cool air from the cooling chamber, a discharge duct for guiding the cool air blown from the cooler to the storage chamber, A suction duct for guiding cool air discharged from the storage chamber to the cooler; and a water receiving portion installed at a position where cooling air is passed at a lower end of the cooling panel; The refrigerator is composed of a cooling panel made of a material having good properties, and the cooling panel is exposed in the storage room. The refrigerator according to claim 1, wherein the cooling panel is uneven in a direction perpendicular to a traveling direction of the discharged cold air. The refrigerator according to claim 1 or 2, wherein the cooling panel is disposed to be inclined toward the storage room with respect to a direction in which the discharged cold air travels. The heat insulating material is arrange | positioned between the said cooling panel and the said discharge duct, and the thickness of the said heat insulating material was set as the thickness dimension which differs with respect to the advancing direction of the said discharge cold air. Refrigerator. The refrigerator according to any one of claims 1 to 4, wherein the water receiving portion disposed at a lower end of the cooling panel is disposed in a horizontal direction, and the vicinity of the suction port is deepest. The refrigerator according to any one of claims 1 to 5, wherein water stored in the water receiving part is sprayed into a storage chamber by a spraying device. The refrigerator according to any one of claims 1 to 6, wherein the cooling panel is made of an aluminum material. The refrigerator according to any one of claims 1 to 7, wherein the cooler is an evaporator of a refrigeration cycle, and the refrigerant of the refrigeration cycle is a combustible refrigerant.

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