JP2011027356A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving cooling efficiency and reducing electric power consumption by suppressing heat absorbing amount of an inner wall face within a storage chamber. <P>SOLUTION: The refrigerator includes: a heat insulating case body 101; a heat insulating door 119 for opening/closing an opening front face of the heat insulating case body 101; the storage chamber 106 formed of the heat insulating case body 101 and the heat insulating door 119; and a cooling means for supplying cold air to cool inside of the storage chamber 106 by forced convection or natural convection. A heat absorption suppressing shape for suppressing absorption of heat from outside air with respect to the flowing direction of the cold air is provided on the inner wall face opposing to an outer wall face exposed to outside air out of the inner wall face within the storage chamber 106 where the cold air is made to flow. Due to this shape, the inner wall face within the storage chamber 106 can suppress the heat absorbing amount from the outside air, so as to provide the refrigerator capable of improving cooling efficiency and reducing electric power consumption. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator having a high energy saving effect.

  FIG. 7 is a cross-sectional view of the basic structure of a freezer compartment of a conventional refrigerator.

  As shown in FIG. 7, a door gasket 12 is provided over the entire periphery at the end of the inner surface of the door 11, and a metal receiving member configured on the front surface of the partition wall 13 that forms the receiving surface of the door gasket 12. 14 and the door gasket 12 are brought into close contact with each other to prevent cold air from leaking to the outside.

  Cold air generated by a cooler 15 installed on the back of the main body is blown out from the discharge port 17 on the back of the freezer compartment 25 by a fan 16 to cool the food stored therein.

  Then, the cold air that has cooled the food reaches the upper front part of the storage cases 18 and 19, as shown by the arrows, and the space between the inner wall of the door 11 and the front surfaces of the storage cases 18 and 19, and the bottom surface of the storage case 19. Circulation returns from the return duct 21 to the cooler 15 through the space with the bottom wall of the storage chamber.

  Further, the metal receiving member 14 formed on the front surface of the partition wall 13 that partitions the freezer compartment 25 and the upper storage chamber 22 is cooled by the cool air reaching the upper front part of the storage case 18, and the partition wall is caused by the temperature difference between the inside and the outside. In order to prevent the metal receiving member 14 formed on the front surface of the 13 from condensing, the heat radiating pipe 23 is disposed in close contact with the side surface of the metal receiving member 14 in the storage chamber. Since this heat radiating pipe 23 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown) and heats the metal receiving member 14 formed on the front surface of the partition wall 13 to a high temperature by the heat, While preventing condensation, the air above the front of the freezer compartment 25 is heated, resulting in a reduction in cooling efficiency.

  In order to prevent this, a mechanism has been proposed in which a seal member 24 indicated by a two-dot chain line is provided in the upper space portion of the storage case 18 in the vicinity of the partition wall 13 to shield the cold air flow toward the door gasket 12. . (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 10-96584

  However, in the above-described conventional configuration, the cold air that has cooled the food in the storage case 18 flows between the storage case 18 and the door inner wall 11a from the opening 18a provided in the upper part of the storage case 18 or the front wall of the storage case 18. It flows down the space A and returns to the return duct 21 through the bottom surface of the storage case 19 and the space on the back surface facing the high-temperature compressor 26.

  By the way, the door inner wall 11a which is an inner wall surface in the storage chamber is heated by absorbing the outside air. Since heat exchange is performed between the inner wall surface of the storage chamber heated by absorbing the outside air and the cool air circulating in the storage chamber, there is a problem that the cooling efficiency is lowered when the heat absorption amount is large.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which improved the cooling efficiency and reduced the power consumption by suppressing the heat absorption amount of the inner wall surface in a storage chamber.

  In order to solve the above conventional problems, the refrigerator of the present invention is a storage formed by a heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, and the heat insulating box and the heat insulating door. And a cooling means for supplying cold air that cools the storage chamber by forced convection or natural convection, and the opposed outer wall surfaces of the inner wall surfaces of the storage chamber through which the cold air flows are exposed to the outside air. The inner wall surface is provided with an endothermic suppression shape that suppresses the endothermic heat from the outside air with respect to the flow direction of the cold air.

  Thereby, the inner wall surface in the storage chamber can suppress the amount of heat absorbed from the outside air.

  In the refrigerator according to the present invention, the inner wall surface in the storage chamber can suppress the amount of heat absorbed from the outside air, and the refrigerator can be provided with improved cooling efficiency and reduced power consumption.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Cross-sectional view of the freezer compartment of the refrigerator in Embodiment 1 of the present invention The heat insulation door upper part expanded sectional view of the freezer compartment of the refrigerator in Embodiment 1 of this invention Convex shape expanded sectional view of the freezer compartment of the refrigerator in Embodiment 1 of the present invention The expanded sectional view which shows the dimension of the convex shape of the freezer compartment of the refrigerator in Embodiment 1 of this invention The lower expanded sectional view of the freezer compartment of the refrigerator in Embodiment 2 of the present invention. Sectional view of the freezer compartment of a conventional refrigerator

  The invention according to claim 1 includes a heat insulating box, a heat insulating door that opens and closes an opening front of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and the storage chamber. Cooling means for supplying cold air to be cooled by forced convection or natural convection, and the inner wall surface of the storage chamber through which the cold air flows is opposed to the inner wall surface exposed to the outside air. By providing a heat absorption suppression shape that suppresses heat absorption from the outside air with respect to the flow direction, the inner wall surface of the storage chamber can suppress the amount of heat absorption from the outside air, improving cooling efficiency and reducing power consumption. A refrigerator can be provided.

  According to a second aspect of the present invention, in the first aspect of the invention, a storage case that can be pulled out is provided in the storage chamber, so that a space is formed between the inner wall surface of the storage chamber and the storage case. Then, the cold air flows through the space as an air passage, and the cold air is distributed throughout the storage chamber, so that the temperature distribution can be made uniform.

  According to a third aspect of the present invention, in the first aspect of the present invention, the storage case that can be pulled out into the storage chamber, and a cold air discharge port that is provided on the back of the storage chamber and supplies the cold air to the storage chamber; And a cold air inlet for returning the cold air circulated along the inner wall surface of the storage chamber to the cooling means, and forcibly circulating the cold air throughout the storage chamber. Temperature distribution can be made more uniform.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the endothermic suppression shape has a convex shape on the inner wall surface of the heat insulating door toward the storage chamber side. As a result, it is possible to generate a region where the flow velocity is slow behind the convex shape with a simple process, and the heat transfer coefficient in the region where the flow velocity is slowed down. Therefore, it is possible to provide a refrigerator with improved cooling efficiency and, as a result, reduced power consumption.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the endothermic suppression shape has a convex shape toward an inner wall surface of the heat insulation box toward the storage chamber. As a result, it is possible to generate a region where the flow velocity is slow behind the convex shape with a simple process, and the heat transfer coefficient in the region where the flow velocity is slowed down. Therefore, it is possible to provide a refrigerator with improved cooling efficiency and, as a result, reduced power consumption.

  The invention according to claim 6 is the invention according to claim 4 or 5, wherein a plurality of the convex shapes are formed on the same surface of the inner wall surface, thereby generating more regions where the flow velocity becomes slower. In addition, the inner wall surface in the storage chamber can further suppress the amount of heat absorbed from the outside air, so that the refrigerator can be provided with improved cooling efficiency and reduced power consumption.

  The invention according to claim 7 is the invention according to claim 3, wherein the endothermic suppression shape has a convex shape on the inner wall surface of the heat insulating door toward the storage chamber side, The upper portion has a handle for pulling out the storage case, and at least a part of the convex shape is provided between the upper end and the lower end of the handle portion, so that the convex shape is blown out from the cold air discharge port. By providing it between the upper and lower ends of the handle, which is the part where the cool air with the lowest temperature reaches the inner wall surface of the insulated door the earliest, the cool air circulates in the storage chamber while further suppressing the temperature rise of the cool air. Therefore, the cooling efficiency can be further improved, and a refrigerator with reduced power consumption can be provided.

  The invention according to claim 8 is the invention according to claim 3, wherein the endothermic suppression shape has a convex shape toward an inner wall surface of the heat insulating door toward the storage chamber side, A partition wall partitioning another adjacent storage chamber; and having a handle portion for pulling out the storage case at an upper portion of the storage case, wherein at least a part of the convex shape is formed at an upper end of the handle portion. By providing it between the lower end of the partition wall, it is possible to reduce the flow of cold air toward the metal receiving member that is provided on the front surface of the partition plate and is heated to a high temperature, and suppresses the heating of the air above the front of the freezer compartment As a result, a refrigerator with improved cooling efficiency and reduced power consumption can be provided.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the freezer compartment of the refrigerator according to Embodiment 1 of the present invention. FIG. 3 is an enlarged cross-sectional view of the heat insulation door upper part of the freezer compartment of the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is an enlarged cross-sectional view of the convex shape of the freezer compartment of the refrigerator according to Embodiment 1 of the present invention. FIG. 5 is an enlarged cross-sectional view showing the dimensions of the convex shape of the freezer compartment of the refrigerator in the first embodiment of the present invention.

  In FIG. 1, a heat insulating box 101 of a refrigerator 100 includes an outer box 102 mainly using a steel plate and an inner box 103 molded of a resin such as ABS, and the inside thereof is made of, for example, hard foam urethane or the like. Filled with foam insulation, insulated from the surroundings, divided into a plurality of storage rooms. The refrigerator compartment 104 is arranged at the top, the vegetable compartment 105 is arranged below the refrigerator compartment 104, and the freezer compartment 106 is arranged at the bottom.

  The front opening of each storage room is closed by heat insulating doors 117, 118, and 119 that are pivotally supported on the refrigerator main body.

  The refrigerator compartment 104 is normally set to 1 ° C. to 5 ° C. at the lower limit of the temperature at which it is not frozen for refrigerated storage. The freezer compartment 106 is set to a freezing temperature zone, and is usually set at −22 ° C. to −15 ° C. for frozen storage, but for example, −30 ° C. or −25 ° C. to improve the frozen storage state. It may be set at a low temperature.

  A machine room 107 is formed in the rear region of the freezer compartment 106 at the lowermost part of the heat insulating box 101, and the compressor 108 and components on the high pressure side of the refrigeration cycle such as a dryer (not shown) for removing moisture are accommodated. .

  In FIG. 2, a cooling chamber 109 for generating cold air is provided on the back surface of the freezing chamber 106, and a cooling air conveyance air passage to each chamber having heat insulation properties and an insulating partition with each chamber are provided between them. The rear surface partition wall 110 is configured. A cooler 111 is disposed in the cooling chamber 109, and in the upper space of the cooler 111, cold air cooled by the cooler 111 by a forced convection method is blown to the refrigerator compartment 104, the vegetable compartment 105, and the freezer compartment 106. A cooling fan 112 is disposed, and a lower space of the cooler 111 is provided with a radiant heater 113 made of glass tube for defrosting the frost and ice adhering to the cooler 111 and its surroundings at the time of cooling. A drain pan 114 for receiving defrosted water generated at the time of defrosting and draining it outside the storage is configured at the lower part, and an evaporating dish 116 is configured outside the storage on the downstream side. In this embodiment, isobutane, which is a flammable refrigerant, is enclosed in the refrigeration cycle.

  A cool air discharge port 124 for supplying the cool air generated by the cooler 111 to the freezing chamber 106 by the cooling fan 112 and the inside of the freezing chamber 106 are circulated below the cool air discharge port 124 in the rear partition wall 110. A cold air inlet 125 for returning the cold air to the cooler 111 is provided.

  In addition, a storage case is provided in the freezer compartment 106 to be pulled out while being held by a drawer mechanism. In the present embodiment, three storage cases are arranged in the freezer compartment. Specifically, an upper storage case 126, a middle storage case 127, and a lower storage case 128 are arranged.

  Further, a handle portion 126 </ b> A for pulling out the storage case 126 is provided on the upper portion of the storage case 126. Further, as shown in FIG. 3, at least a part of the convex shape 129 is provided between the upper end (X portion) and the lower end (Y portion) of the handle portion 126A.

  In FIG. 3, a door gasket 121 is provided on the entire inner edge of the heat insulating door 119 (the door gasket is also provided in the refrigerator compartment 104 and the vegetable compartment 105). The metal receiving member 123 and the door gasket 121 provided on the front surface of the partition wall 122 having a resin portion on the outer periphery that separates the freezer compartment 106 are closely attached to prevent cold air from leaking to the outside.

  Further, the heat insulating member 130 provided at the lower portion of the metal receiving member 123 is held by a resin portion that constitutes the outer periphery of the partition wall 122.

The metal receiving member 123 is provided with a heat radiating pipe 131 so as to be in close contact with the side surface of the metal receiving member 123 in the storage chamber in order to prevent condensation on the outer surface of the storage chamber. The heat radiating pipe 131 uses a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the metal receiving member 123 to a high temperature.

  In FIG. 4, a convex shape 129 is provided on the inner wall surface of the heat insulating door 119 toward the freezer compartment 106 side so as to be perpendicular to the flow of cold air supplied from the cold air discharge port 124. Specifically, a convex shape 129 is provided in the width direction of the refrigerator (from the back side to the front side in FIG. 1). The inner wall surface of the heat insulating door 119 is an example of the inner wall surface in the storage chamber.

  The convex shape 129 is provided on the inner wall surface of the inner wall surface of the storage chamber through which cool air flows, and the opposite outer wall surface is exposed to the outside air, and absorbs heat from the outside air with respect to the flow direction of the cold air. It is an example of the endothermic suppression shape which suppresses.

  More specifically, the convex shape 129 has a constant interval (equal pitch) from the vicinity of the top of the heat insulating door 119 to the vicinity of the bottom of the heat insulating door 119 in the height direction (vertical direction in FIG. 3). ) And a plurality of heat insulating doors 119 are provided.

  Moreover, the convex shape 129 is provided continuously in the width direction of the refrigerator.

  In the present embodiment, details of the convex shape are as follows. As shown in FIG. 5, the distance (A dimension) between adjacent convex shapes 129 is 46.5 mm, the width dimension (B dimension) of the convex shape 129 is 5 mm, and the height dimension (D dimension) of the convex shape 129 is 2 mm. The angle E is 120 degrees.

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

  First, the flow of cold air in the freezer compartment 106 will be described. The cool air cooled by the cooler 111 is forcibly blown from the cool air discharge port 124 to the upper, middle, and lower stages in the freezer compartment 106 by the cooling fan 112 that rotates as the motor rotates. The blown-out cool air is blown to the storage cases 126, 127, and 128 to cool the food stored.

  As shown by the arrows in FIG. 3, the cold air that has cooled the foods is the gap between the storage case 126 and the partition wall 122 in the upper stage, the gap between the storage case 126 and the storage case 127 in the middle stage, and the storage case 127 in the lower stage. The air flows through the gaps of the storage case 128, passes through the gap between the storage case 128 and the bottom wall of the inner box 103, is sucked from the cold air inlet 125, and returns to the cooler 111. ing.

  As described above, the cold air is heated by exchanging heat with the inner wall surface in the freezer compartment 106 when circulating in the freezer compartment 106. In the upper stage cool air, heat exchange is performed most in the vicinity of the metal receiving member 123 heated by the heat radiating pipe 131, but the heat insulating member 130 is provided below the metal receiving member 123, so that Transfer to the surface in contact with the heat is reduced by the heat insulating member 130 having a low thermal conductivity, thereby preventing an increase in the temperature of the surface in contact with the cold air.

  After that, the cold air flows along the inner wall of the heat insulating door 119. By providing the convex shape 129 so as to be perpendicular to the flow of the cold air, the flow velocity is increased behind the convex shape 129 as shown by the arrow in FIG. A slow region can be generated, and the heat transfer coefficient in the region where the flow rate is slowed down. Therefore, the inner wall surface in the freezer compartment 106 can suppress the amount of heat absorbed from the outside air, thereby improving the cooling efficiency. As a result, the power consumption can be reduced.

In addition, since the cooling of the cold air can be suppressed, the cold air circulates at a low temperature, so that the temperature distribution in the entire freezer compartment 106 can be kept more uniform.

  Here, details regarding the suppression of the endothermic amount will be described.

  In general, the heat passing amount (endothermic amount) Q is represented by the following equation.

Q = K * A * ΔT
K = 1 / (1 / αo + 1 / αi + L / λ)
(Q: heat passing rate, K: heat transfer rate, A: heat transfer area, ΔT: temperature difference, αo: outer surface heat transfer rate, αi: inner surface heat transfer rate, λ: heat insulating wall heat transfer rate (heat insulating material λ1 And composite heat conductivity of inner box resin λ2 and outer box steel plate λ3), L: thickness of heat insulating wall)
As in this embodiment, by providing a convex shape on the inner wall surface of the heat insulating door, which is the inner wall surface of the storage room, and making the inner wall surface into a concavo-convex shape, the inner surface heat with respect to the flow direction of cold air on the concave The transmission rate αi is reduced and K is reduced. As a result, the amount of heat absorbed from the outside air can be suppressed.

  As described above, in the present embodiment, the heat insulating box body 101, the heat insulating door 119 that opens and closes the front surface of the opening of the heat insulating box body 101, and the storage room formed by the heat insulating box body 101 and the heat insulating door 119 are used. A freezing chamber 106 and a cooling means for supplying cold air that cools the inside of the freezing chamber 106 by forced convection are provided, and the opposed outer wall surfaces of the inner wall surfaces in the freezing chamber 106 through which the cold air flows are exposed to the outside air. By providing the inner wall surface with a convex shape 129 that suppresses heat absorption from the outside air with respect to the flow direction of the cold air, the inner wall surface in the storage chamber can suppress the amount of heat absorption from the outside air, thereby improving the cooling efficiency. A refrigerator with reduced power consumption can be provided.

  In addition, since the storage cases 126, 127, and 128 that can be pulled out into the freezer compartment 106 are provided, a space is formed between the inner wall surface of the freezer compartment 106 and the storage case, and the cool air serves as an air path. The temperature distribution can be made uniform by the flow and the cold air spreading throughout the freezer compartment 106.

  Also, a storage case that can be drawn into the freezer compartment 106, a cold air outlet 124 that is provided at the back of the freezer compartment 106 to supply cold air into the freezer compartment 106, and an inner wall surface in the freezer compartment that is provided at the back of the storage case. By providing the cold air inlet 125 for returning the cold air circulated along the cooling means, the cold air can be forced to circulate throughout the freezer compartment, and the temperature distribution can be made more uniform.

  Further, since the inner wall surface of the heat insulating door 119 has a convex shape toward the freezer compartment 106 side, the flow velocity can be increased behind the convex shape 129 by performing simple processing without performing complicated processing. A slow region can be generated, and the heat transfer coefficient in the region where the flow rate is slowed down. Therefore, the inner wall surface in the freezer compartment 106 can suppress the amount of heat absorbed from the outside air, thereby improving the cooling efficiency. As a result, the power consumption can be reduced.

  In addition, by providing a plurality of convex shapes 129 on the same surface of the inner wall surface of the heat insulating door 119, more regions where the flow velocity becomes slower can be generated, and the inner wall surface in the storage chamber can further suppress the amount of heat absorbed from the outside air. Thus, a refrigerator with improved cooling efficiency and reduced power consumption can be provided.

  Further, since the convex shape 129 is formed integrally with the inner wall surface of the heat insulating door 119, no separate parts are required, and it is very inexpensive and does not increase the number of assembly steps.

Further, by providing the convex shape 129 in the vicinity of the uppermost portion of the inner wall surface of the heat insulating door 119, which is the portion where the cold air blown out from the cold air discharge port 124 reaches the inner wall surface of the heat insulating door 119 earliest, Since the cold air circulates in the storage chamber while further suppressing the temperature rise of the cold air, the cooling efficiency can be further increased.

  Further, a handle portion 126 </ b> A for pulling out the storage case 126 is provided on the upper portion of the storage case 126. Thereby, usability when the user pulls out the storage case is improved. In the present embodiment, as shown in FIG. 3, at least a part of the convex shape 129 is provided between the upper end (X portion) and the lower end (Y portion) of the handle portion 126A, thereby increasing the temperature of the cold air. Since the cool air circulates in the storage chamber while further suppressing the cooling, the cooling efficiency can be further increased, and a refrigerator with reduced power consumption can be provided.

  That is, it is desirable to provide the convex shape 129 in the vicinity of the point where the cold air begins to flow substantially in parallel along the heat insulating door 119.

  Further, as shown in FIG. 3, at least a part of the convex shape 129 is provided between the upper end (X portion) of the handle portion 126A and the lower end of the partition wall 122, so that the metal receiver heated to a high temperature is received. The flow of cold air toward the member 123 can be reduced, heating of the air above the front of the freezer compartment 106 can be suppressed, and a refrigerator with improved cooling efficiency and reduced power consumption can be provided.

  In addition, by setting the height dimension (D dimension) of the convex shape 129 to 2 mm, a clearance dimension between the storage case and the inner wall of the heat insulating door 119 can be secured, and the flow of cold air (air path) can be secured. .

  Further, by setting the width dimension (B dimension) of the convex shape 129 to 5 mm, the convex portion can be pressed with a mold, and the moldability of the convex shape 129 can be ensured.

  Moreover, when the height of the heat insulating door is high, a section in which cold air flows along the heat insulating door becomes long, and the effect of suppressing the amount of heat absorbed from the outside air becomes larger.

  Further, the same effect can be obtained by providing a convex shape 129 on the inner wall of the heat insulation door 118 of the vegetable compartment 105 or the inner wall of the heat insulation door 117 of the refrigerator compartment 104 in the storage room other than the freezer compartment 106. be able to.

  In the present embodiment, the convex shape 129 is provided at a constant interval (equal pitch) with respect to the height direction of the heat insulating door 119, but this interval may be an unequal pitch.

  In the present embodiment, the convex shape 129 is provided continuously in the width direction of the refrigerator, but is provided intermittently in the width direction of the refrigerator (that is, the convex shape in the width direction of the refrigerator). There may be a place where there is no provision).

  In this embodiment, the cooling means is cooled by forced convection, but may be cooled by natural convection (so-called direct cooling).

  In the present embodiment, three storage cases are provided in the storage chamber. However, one or two storage cases may be provided in the storage chamber.

(Embodiment 2)
FIG. 6 is a lower enlarged sectional view of the refrigerator in the second embodiment of the present invention.

As shown in FIG. 6, a convex shape 129 is provided on the bottom surface of the inner box 103, which is the inner wall surface in the freezer compartment 106, and on the back surface facing the compressor 108. The inner wall surface of the inner box 103 is an example of the inner wall surface in the storage chamber.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. In addition, description about the operation | movement similar to Embodiment 1 and an effect | action is abbreviate | omitted.

  The cold air blown into the freezing chamber 106 from the cold air discharge port 124 flows through the space on the bottom surface of the storage case 128 and the back surface facing the compressor 108 as shown by the arrows in FIG. By providing the convex shape 129 in such a direction, it is possible to generate a region where the flow velocity is slow behind the convex shape 129, and the heat transfer coefficient in the region where the flow velocity is slow is reduced. The wall surface can suppress the amount of heat absorbed from the outside air, thereby improving the cooling efficiency and consequently reducing the power consumption.

  In particular, by providing a convex shape 129 on the inner wall surface of the freezer compartment 106 facing the compressor 108 that becomes high in temperature, the inner wall surface in the freezer compartment 106 can further suppress the amount of heat absorbed from the outside air. Efficiency can be improved, and as a result, power consumption can be further reduced.

  Further, since the cooling of the cold air can be suppressed, the cold air circulates at a low temperature, so that the temperature distribution in the entire freezer compartment 106 can be kept more uniform.

  In addition, since the inner wall surface of the inner box 103 has a convex shape toward the freezer compartment 106 side, the flow velocity can be increased behind the convex shape 129 by performing simple processing without performing complicated processing. A slow region can be generated, and the heat transfer coefficient in the region where the flow rate is slowed down. Therefore, the inner wall surface in the freezer compartment 106 can suppress the amount of heat absorbed from the outside air, thereby improving the cooling efficiency. As a result, the power consumption can be reduced.

  Further, by providing a plurality of convex shapes 129 on the same surface of the inner wall surface of the inner box 103, it is possible to generate more regions where the flow velocity becomes slower, and the inner wall surface in the freezer compartment can further suppress the amount of heat absorbed from the outside air. Thus, a refrigerator with improved cooling efficiency and reduced power consumption can be provided.

  Further, since the convex shape 129 is formed integrally with the inner wall surface of the inner box 103, no separate parts are required, and it is very inexpensive and does not increase the number of assembly steps.

  In addition, by providing a convex shape on the inner wall surface of the heat insulating door shown in the first embodiment and providing a convex shape on the inner wall surface of the inner box of the heat insulating box shown in the second embodiment, Further, the inner wall surface in the storage room can suppress the amount of heat absorbed from the outside air, thereby improving the cooling efficiency and providing a refrigerator with further reduced power consumption.

  As described above, the refrigerator according to the present invention can be applied to a household or commercial refrigerator or a vegetable storage.

100 Refrigerator 101 Heat insulation box 106 Freezer compartment (storage compartment)
117, 118, 119 Thermal insulation door 111 Cooler 124 Cold air outlet 125 Cold air inlet 126, 127, 128 Storage case 126A Handle part 129 Convex shape

Claims (8)

A heat insulating box, a heat insulating door that opens and closes the front surface of the opening of the heat insulating box, a storage chamber formed by the heat insulating box and the heat insulating door, and cold air that cools the storage chamber by forced convection or natural convection. A cooling means for supplying the cooling air to the inner wall surface of the inner wall surface of the storage chamber through which the cool air circulates, the opposite outer wall surface being exposed to the outside air from the outside air with respect to the flow direction of the cool air. A refrigerator provided with an endothermic suppression shape that suppresses the endothermic heat. The refrigerator according to claim 1, further comprising a storage case that can be pulled out into the storage chamber. A storage case that can be drawn into the storage chamber, a cool air discharge port that is provided at the back of the storage chamber and supplies the cool air to the storage chamber, and an inner wall surface of the storage chamber that is provided at the back of the storage case The refrigerator according to claim 1, further comprising: a cold air inlet for returning the circulated cold air to the cooling means. The refrigerator according to any one of claims 1 to 3, wherein the endothermic suppression shape has a convex shape toward an inner wall surface of the heat insulating door toward the storage room. The refrigerator according to any one of claims 1 to 4, wherein the endothermic suppression shape has a convex shape toward an inner wall surface of the heat insulating box toward the storage chamber. The refrigerator according to claim 4 or 5, wherein a plurality of the convex shapes are formed on the same surface of the inner wall surface. The endothermic suppression shape has a convex shape on the inner wall surface of the heat insulating door toward the storage chamber side, and has a handle portion for pulling out the storage case at the upper portion of the storage case, The refrigerator according to claim 3, wherein at least a part of the shape is provided between an upper end and a lower end of the handle portion. The endothermic suppression shape has a convex shape toward the storage chamber side on the inner wall surface of the heat insulating door, and includes a partition wall that divides the storage chamber and another storage chamber adjacent thereto, and the storage case The refrigerator according to claim 3, further comprising a handle portion for pulling out the storage case at an upper portion of the tub, wherein at least a part of the convex shape is provided between an upper end of the handle portion and a lower end of the partition wall. .