CN102692111B - Freezer - Google Patents

Abstract

The invention provides a refrigerator which improves cooling efficiency and reduces power consumption by suppressing heat absorption on the surface of an outer box. The refrigerator includes: a heat-insulating box, which has an inner box, an outer box, and a heat insulating material arranged between the inner box and the outer box; a lower machine room, which is formed at the lower part of the heat-insulating box; Open and close the opening of the heat insulation box; the storage room has a plurality of different temperature zones composed of the heat insulation box and the heat insulation door. The outer box surface of the heat insulating box through which warm air generated in the lower machine room with high air temperature flows suppresses heat absorption from high-temperature warm air.

Description

Cold storage

technical field

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

Background technique

Fig. 9 is a longitudinal sectional view of a basic structure of a freezer compartment of a conventional refrigerator.

As shown in FIG. 9 , the box body 10 of the refrigerator includes: an outer box 11 ; an inner box 13 ; ; and can bond the outer box 11, the inner box 13 and the vacuum insulation materials 50, 52, 53, 55, and foam insulation materials 12 such as polyurethane which itself has adhesive force.

In the box body 10, there is a refrigerated temperature chamber 14 with an unillustrated vegetable compartment or a refrigerated compartment whose set temperature is below 10° C. and an ice-making compartment or a quick-freezing compartment with a set temperature of -16° C. to -30° C. The level of freezing temperature chamber 15 is divided between each chamber by a front partition 16 and a partition wall 17 .

On the opening front surface of the refrigerated temperature compartment 14, there is a door body 30 that closes the opening front surface in an openable and closable manner. The door body 30 includes: an outer box 31; an inner box 33; a vacuum insulation material 51 arranged in a heat insulating wall formed by the outer box 31 and the inner box 33; The thermal insulation material 51, and the foamed thermal insulation material 32 such as polyurethane itself has adhesive force.

On the opening front surface of the freezing temperature compartment 15, there is a door body 35 which closes the opening front surface in an openable and closable manner. This door body 35 comprises: outer case 36; Inner case 38; The vacuum insulation material 54 that is arranged in the insulating wall that is formed by outer case 36 and inner case 38; And can bond outer case 36, inner case 38 and vacuum Heat insulating material 54, and foam heat insulating material 37 such as polyurethane itself has adhesive force.

In addition, although omitted in FIG. 7 , as described above, the respective front surfaces of the refrigerating temperature chamber 14 and the freezing temperature chamber 15 are closed by independent doors 30 , 35 . For example, the refrigerating temperature chamber 14 and the freezing temperature chamber 15 are separated by a member corresponding to the front partition 16 , and the member corresponding to the front partition 16 receives the door bodies 30 , 35 . Further, between the refrigerating temperature chamber 14 and the freezing temperature chamber 15, which are storage rooms having different temperature ranges, are partitioned by a member corresponding to the partition wall 17, and the member corresponding to the partition wall 17 has a heat insulating structure.

Moreover, in the lower part of the freezing temperature chamber 15, the insulation wall forms the lower part machine room, and the compressor 40 is installed.

These vacuum heat insulating materials 50 , 51 , 52 , 53 , 54 , and 55 can realize higher heat insulating performance than the foam heat insulating materials 12 , 32 , and 37 . For example, the heat conductivity of the foam insulation material 12 on the box body 10 side is about 0.016W/mK, and the heat conductivity of the foam insulation materials 32 and 37 on the door body 30 and 35 side is about 0.018W/mK, On the other hand, the thermal conductivity of the vacuum heat insulating materials 50, 51, 52, 53, 54, and 55 is about 0.002 W/mK to 0.003 W/mK.

Therefore, a heat insulating wall made of only a vacuum heat insulating material whose heat leakage is set to be the same as that of a heat insulating wall formed of a foam heat insulating material such as polyurethane is equal to the area of the heat insulating wall where heat leakage is assumed to occur in both. In time, it reaches a thickness dimension of about 1/5 to 1/9 of the heat insulating wall formed only of the foam heat insulating material.

In addition, the vacuum heat insulating materials 50, 51, 52, 53, 54, and 55 are installed on each surface of the heat insulating wall around the refrigeration temperature chamber 14 and the heat insulating wall around the freezing temperature chamber 15 as shown in FIG. .

These vacuum heat insulating materials 50, 51, 52, 53, 54, 55, in the part where the temperature difference between the inside temperature of the refrigerator and the outer surface of the box body 10 is larger, the vacuum heat insulating materials account for the outer box 11 and the inner box 11. The volume ratio of the insulating wall volume formed by the tank 13 is set larger.

For example, assuming that the area of the insulation wall around the refrigerating temperature chamber 14 is the same as the area of the insulation wall around the freezing temperature chamber 15, the vacuum insulation materials 50, 51, The thickness of 52 is set as tr, and the thickness of the vacuum heat insulating materials 53, 54, and 55 arranged in the heat insulation wall thickness Tf around the freezing temperature chamber 15 is set as tf, then the heat insulation wall thickness Tr around the refrigeration temperature chamber 14 is The relationship between the thickness tr of the vacuum heat insulating materials 50, 51, 52, the heat insulating wall thickness Tf around the freezing temperature chamber 15, and the thickness tf of the vacuum heat insulating materials 53, 54, 55 is tf/Tf>tr/Tr.

That is, the greater the temperature difference between the temperature inside the box and the surrounding temperature of the outer surface of the box body 10, the volume ratio of the vacuum heat insulating material to the volume of the heat insulating wall formed by the outer box 11 and the inner box 13 is set so that bigger.

In this way, the greater the temperature difference between the temperature inside the box and the temperature around the outer surface of the box body 10, the more the vacuum heat insulating material occupies the volume of the heat insulating wall formed by the outer box 11 and the inner box 13. Setting the ratio to a large value can promote energy-saving operation, and it is proposed to provide a refrigerator with improved energy-saving performance as a whole (for example, refer to Patent Document 1).

Prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2006-189207

Contents of the invention

The problem to be solved by the invention

However, the above-mentioned existing structure emphasizes how to improve the heat insulation to prevent the heat absorbed by the heat exchange between the external air and the surface of the outer box from entering the box, and does not consider reducing the amount of heat exchange with the external air on the surface of the outer box , that is, the heat absorbed from the surface of the outer box itself. In particular, the surface of the compressor installed in the lower machine compartment formed in the lower part of the refrigerator reaches a temperature higher than that of the outside air during the cooling operation. Therefore, the air near the compressor is warmed by the compressor, and a temperature difference is generated between the surrounding air and the surrounding air. As a result, an upward airflow (natural convection) is generated from the vicinity of the compressor, and flows upward along the surface of the outer case. Furthermore, since the generated high-temperature updraft exchanges heat with the surface of the outer case, the heat absorbed by the high-temperature updraft on the outer case surface is large, and cooling efficiency tends to decrease.

The present invention was developed to solve the above-mentioned conventional problems, and an object of the present invention is to provide a refrigerator that suppresses heat exchange on the surface of the outer box and reduces heat absorbed from the surface of the outer box, thereby improving cooling efficiency and reducing power consumption.

method used to solve the problem

In order to solve the above-mentioned conventional problems, the refrigerator of the present invention includes: a heat-insulating box body having an inner box, an outer box, and a heat insulating material arranged between the inner box and the outer box; The lower part of the heat insulating box; the insulating door opening and closing the opening of the heat insulating box; The heat-insulating box has a heat-absorption suppressing part provided on the outer surface of the above-mentioned heat-insulating box through which the warm air generated from the lower machine room whose temperature is higher than that of the outside air flows during operation, and suppresses heat loss from the above-mentioned Heating absorbs heat.

Thereby, the amount of heat absorbed from the surface of the outer case can be reduced.

Invention effect

The refrigerator of the present invention can provide a refrigerator in which cooling efficiency is improved and power consumption is reduced by reducing the heat absorbed from the surface of the outer box.

Description of drawings

Fig. 1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention.

Fig. 2 is a sectional view of a freezer compartment of the refrigerator according to Embodiment 1 of the present invention.

3 is an enlarged cross-sectional view of a cooling room and a lower machine room of the refrigerator according to Embodiment 1 of the present invention.

4 is an enlarged cross-sectional view of a convex portion on the surface of the outer case of the refrigerator according to Embodiment 1 of the present invention.

5 is an enlarged cross-sectional view showing dimensions of convex portions on the outer case surface of the refrigerator according to Embodiment 1 of the present invention.

Fig. 6 is an enlarged lower sectional view of the freezer compartment of the refrigerator according to Embodiment 2 of the present invention.

7 is an enlarged cross-sectional view of a cooling room and a lower machine room of the refrigerator according to Embodiment 3 of the present invention.

Fig. 8 is an enlarged lower sectional view of a freezer compartment of the refrigerator according to Embodiment 4 of the present invention.

Fig. 9 is a sectional view of a freezer compartment of a conventional refrigerator.

Symbol Description

10 boxes

11, 31, 36, 102 outer boxes

12, 32, 37 foam insulation material

13, 33, 38, 103 inner box

14 refrigerated temperature chambers

15 freezer temperature chamber

16 front bulkhead

17 partition wall

30, 35 doors

40, 108 compressors

50～55 Vacuum insulation material

100 cold storage

101 heat insulation box

101a Thermal insulation materials

104 cold room (storage room)

105 vegetable room (storage room)

106 freezer (storage room)

107 Lower Mechanical Room

108a condenser

108b air cooling fan

109 cooling room

110 inner partition wall

111 cooler

112 cooling fan

113 radiant heater

114 water tray

116 evaporating dish

117, 118, 119 insulation door

121 door liner

122 partition wall

123 metal support parts

124 air-conditioning outlet

125 cold air intake

126～128 storage box

129 Convex

detailed description

The refrigerator according to the first aspect of the present invention includes: a heat-insulating box having an inner box, an outer box, and a heat-insulating material arranged between the inner box and the outer box; and a lower machine room provided in the heat-insulating box. The lower part of the body; the insulating door, which opens and closes the opening of the above-mentioned heat-insulating box; and the storage room, which has a plurality of different temperature regions composed of the above-mentioned heat-insulating box and the above-mentioned heat-insulating door, wherein the above-mentioned heat-insulating box A heat absorption suppressing portion is provided on the outer case surface of the heat insulating box through which warm air generated from the lower machine room having a temperature higher than outside air during operation flows, and suppresses heat absorption from the warm air. Accordingly, it is possible to provide a refrigerator capable of reducing heat absorbed from the surface of the outer case, improving cooling efficiency, and reducing power consumption.

According to a second aspect of the present invention, in the first aspect of the present invention, the heat absorption suppressing portion is a convex portion provided on the outer case surface of the heat insulating box and facing the outside air side. Thereby, cooling efficiency is improved, and as a result, power consumption can be reduced.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, a plurality of the protrusions are formed on the outer case surface of the heat insulating box. Thereby, cooling efficiency is improved, and as a result, power consumption can be reduced.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the protrusions are continuously provided in a direction intersecting a flow direction of warm air generated from the lower machine room. Therefore, heat absorption from the surface of the outer case can be reduced, and cooling efficiency can be improved. As a result, power consumption can be reduced.

According to a fifth aspect of the present invention, in addition to the fourth aspect of the present invention, at least a part of the protrusion is provided on a surface of the outer case opposite to a storage compartment with the lowest set temperature among the storage compartments. Therefore, the effect of reducing the heat absorption can be further obtained, the cooling efficiency can be improved, and as a result, the power consumption can be reduced.

According to a sixth aspect of the present invention, in addition to any one of the first to fifth aspects of the present invention, there is further provided a compressor installed in the lower machine room, and the heat absorption suppressing unit is installed at a temperature lower than that of the outside air during operation. High natural convection generated on the surface of the compressor serves as the outer case surface of the heat insulation box through which the warm air flows, and heat absorption from high-temperature natural convection is suppressed. Therefore, the amount of heat absorbed by high-temperature natural convection generated on the surface of the compressor can be reduced, and the cooling efficiency can be improved. As a result, power consumption can be reduced.

According to a seventh aspect of the present invention, on the basis of any one of the first to fifth aspects of the present invention, there is also a condenser installed in the lower mechanical chamber; and an air cooling fan for air cooling the condenser, the above-mentioned The heat absorption suppressing unit is installed on the surface of the outer case of the above-mentioned heat-insulating box through which the above-mentioned condenser whose temperature is higher than that of the outside air during operation is air-cooled by the above-mentioned air-cooling fan, and the high-temperature exhaust gas flows as the above-mentioned warm air. Heat is absorbed from the high temperature exhaust gas. Therefore, it is possible to reduce the amount of heat absorbed from the high-temperature discharge air after air-cooling the condenser by the air-cooling fan, thereby improving the cooling efficiency, and as a result, it is possible to reduce power consumption.

Hereinafter, embodiments of the present invention will be described in detail using the drawings. In addition, the embodiment described below shows a preferable specific example of this invention. Numerical values, shapes, materials, components, arrangement positions and connection modes of the components shown in the following embodiments are examples, and are not intended to limit the present invention. The present invention is limited only by the scope of the claims. Therefore, among the constituent elements of the following embodiments, the constituent elements that are not described in the independent claims representing the highest concept of the present invention are not necessarily necessary to achieve the subject of the present invention, but constitute more preferable forms. elements are explained.

(Embodiment 1)

Fig. 1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention. Fig. 2 is a sectional view of a freezer compartment of the refrigerator according to Embodiment 1 of the present invention. Fig. 3 is an enlarged cross-sectional view of a cooling chamber of the refrigerator according to Embodiment 1 of the present invention. 4 is an enlarged cross-sectional view of a convex portion on the surface of the outer case of the refrigerator according to Embodiment 1 of the present invention. 5 is an enlarged cross-sectional view showing dimensions of convex portions on the outer case surface of the refrigerator according to Embodiment 1 of the present invention.

In FIG. 1 , a heat insulating box 101 of a refrigerator 100 has an outer box 102 mainly made of a steel plate and an inner box 103 molded from resin such as ABS. The heat-insulating box 101 is filled with a foam-type heat-insulating material 101a such as rigid foamed polyurethane between an outer box 102 and an inner box 103 as its inside, and is insulated from the surroundings, and is divided into a plurality of storage rooms. As a plurality of storage compartments divided into the inner space of the heat-insulating box 101, a refrigerator compartment 104 is arranged at the top of the heat-insulation box 101, a vegetable compartment 105 is arranged below the refrigerator compartment 104, and a freezer compartment is arranged at the bottom. 106. Moreover, the opening part for storing articles|goods in each store room is provided in the heat insulation box 101. As shown in FIG.

In each storage compartment, the front opening is closed by insulating doors 117, 118, 119 pivotally supported to the main body of the refrigerator 100 rotatably. That is, the refrigerator compartment 104 is pivotally supported on the main body of the refrigerator 100 by closing its front opening with the insulated door 117 and is pivotally supported on the main body of the refrigerator 100, and the vegetable compartment 105 is closed with the front opening by the insulated door 118 and is freely openable. The main body of the refrigerator 100 is pivotally supported in the state, and the freezer compartment 106 is pivotally supported on the main body of the refrigerator 100 in a freely openable and closable state with its front opening portion closed by the insulating door 119 .

For refrigerated storage, the indoor temperature of the refrigerator compartment 104 is set at the temperature without freezing as the lower limit, usually set at 1° C. to 5° C. 2°C to 7°C. The indoor temperature of the freezer compartment 106 is set in the freezing temperature range, and is usually set at -22°C to -15°C for cryopreservation. In addition, the freezer compartment 106 is not limited to being set at a temperature range of -22°C to -15°C, and may be set at a low temperature of, for example, -30°C or -25°C in order to improve the cryopreservation state.

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

In FIG. 2 , a cooling chamber 109 that generates cold air on the back of the freezing chamber 106 is further provided in the heat insulating box 101 . Between the cooling chamber 109 and the freezing chamber 106, the inner surface partition wall 110 which thermally insulates and partitions between the freezing chamber 106 and the cooling chamber 109 is formed. Inside the cooling chamber 109 are provided a cooler 111 , a cooling fan 112 , a radiation heater 113 , a drainpan 114 and an evaporation pan 116 . Cooler 111 functions as an evaporator of a refrigeration cycle, and cools each storage room of refrigerator 100 . The cooling fan 112 is arranged in the upper space of the cooler 111 , and blows the cold air cooled by the cooler 111 to the refrigerator compartment 104 , the vegetable compartment 105 and the freezer compartment 106 by forced convection. The radiant heater 113 is a glass pipe heater installed in the lower space of the cooler 111, and removes frost and ice attached to the cooler 111 and its periphery during cooling by heating. The water receiving pan 114 is provided under the radiant heater 113 , and receives defrosting water generated during defrosting and discharges it to the outside of the main body of the refrigerator 100 . Evaporating pan 116 is a pan-shaped member that stores and evaporates defrosted water drained from water pan 114 outside the main body of refrigerator 100 and on the downstream side of water pan 114 . In addition, in the present embodiment, isobutane, which is a flammable refrigerant, is enclosed in the refrigeration cycle.

The inner surface partition wall 110 is provided with: a cold air outlet 124, which supplies the cold air generated by the cooler 111 from the cooling chamber 109 to the freezing chamber 106 through the cooling fan 112; , for returning the cold air circulating in the freezer compartment 106 to the cooler 111 .

In addition, in this embodiment, three storage boxes 126, 127, and 128 are arranged in the freezer compartment 106. The storage boxes are held by a drawer mechanism not shown in the figure and can be drawn in a slidable state, and store kinds of food. Specifically, upper storage box 126 , middle storage box 127 , and lower storage box 128 are arranged in freezer compartment 106 .

Door gasket 121 is provided over the entire circumference at an end portion of the inner surface of insulating door 119 corresponding to freezer compartment 106 . Door gasket 121 is in close contact with metal support member 123 provided on the front surface of partition wall 122 whose outer periphery is made of resin to separate vegetable compartment 105 from freezer compartment 106, thereby preventing cold air from leaking to the outside. In addition, like the insulation door 119 corresponding to the freezer compartment 106, the entire circumference of the inner surface end of the insulation door 117 corresponding to the refrigerator compartment 104 and the entire circumference of the inner surface end of the insulation door 118 corresponding to the vegetable compartment 105 are the same. , a door gasket having the same function as the above-mentioned door gasket 121 is also provided.

In addition, in order to prevent dew condensation, a heat radiation pipe (not shown) is arranged on the side outside the storage room of the metal support member 123 so as to be in close contact with the side inside the storage room of the metal support member 123 . The radiating pipe utilizes a high-temperature refrigerant pipe in a refrigeration cycle (not shown), and heats the metal support member 123 to a high temperature by the heat thereof.

In FIGS. 3 and 4, on the surface of the outer case 102 at a position opposite to the cooling chamber 109, there is provided a wall that protrudes to the outside air side and is in the width direction of the refrigerator 100 (from the inside of the paper of FIG. 1 to the front side of the front). direction) extending as a convex portion 129 as an endothermic suppressing portion. That is, the convex portion 129 protrudes toward the outside air side of the refrigerator 100 in a region of the outer case 102 that is longer in the width direction of the refrigerator 100 than in the height direction of the refrigerator 100 . Refrigerator 100 is continuously installed in the width direction. In addition, the surface of the outer case 102 at the position facing the cooling chamber 109 is an example of the surface of the outer case 102 .

In addition, more specifically, in the height direction (up and down direction in FIG. 3 ) with respect to the refrigerator 100, the surface of the outer box 102 at the position facing the cooling chamber 109 is provided with a certain interval (equal pitch). a convex portion 129.

In addition, in this embodiment, the details of the convex part 129 are as follows. As shown in Figure 5, the interval (A dimension) of adjacent convex portion 129 is 45mm, the width dimension (B dimension) of convex portion 129 is 5mm, the height dimension (D dimension) of convex portion 129 is 3mm, and the angle E is 120 degrees.

Next, the operation and function of the refrigerator configured as above will be described.

First, the flow of outside air around the lower machine room 107 will be described.

Usually, refrigerator 100 is installed with an appropriate space between a wall such as a kitchen and outer box 102 on the rear side of refrigerator 100 . When refrigerator 100 cools the interior, the surface of compressor 108 that operates is higher than the outside air temperature. As a result, the temperature of the air in the vicinity of the compressor 108 is raised by the compressor 108, and a temperature difference is generated between the surrounding air and the surrounding air. Thereby, natural convection is generated from the vicinity of the compressor 108 . The natural convection generated near the compressor 108 is an updraft as shown by the solid line arrows in FIGS. The surface of outer case 102 facing cooling chamber 109 flows upward of refrigerator 100 .

At the same time, through the natural convection generated by the operation of the compressor 108 as described above, the inside of the lower mechanical chamber 107 becomes negative pressure, so the outside of the bottom of the refrigerator 100 as shown by the broken line arrow in FIGS. 2 and 3 Air is sucked into the lower machine compartment 107 . Thereby, the flow of the air which uses the space between the floor of a kitchen etc., and the outer case 102 as an air path arises.

Overall, when cooling the inside of refrigerator 100 , that is, while compressor 108 is operating, a large flow occurs from the lower portion of insulating door 119 to the upper rear of refrigerator 100 .

As described above, when the upward air flow caused by the natural convection generated by the operation of the compressor 108 flows along the surface of the outer case 102 on the position opposite to the cooling chamber 109, the surface of the outer case 102 on the position opposite to the cooling chamber 109 passes through the surface of the outer case 102 and the cooling chamber 109. This updraft is heated by heat exchange. In particular, since cooling chamber 109 has cooler 111, it has the lowest temperature in refrigerator 100, so the amount of heat absorbed from the updraft tends to increase.

However, as in the present invention, by providing the convex portion 129 perpendicular to the updraft, as shown by the arrow in FIG. 4 , a region where the flow velocity slows down can be generated behind the convex portion 129 . Since the thermal conductivity decreases in the region where the flow velocity becomes slow, the amount of heat absorbed from the upward air flow on the surface of the outer case 102 at the position facing the cooling chamber 109 can be suppressed. Thereby, the cooling efficiency of refrigerator 100 improves, and as a result, power consumption can be reduced.

In addition, since the cold air generated in the cooling chamber 109 can be suppressed from being heated by the updraft, the cold air circulates between the freezing chamber 106 and the cooling chamber 109 in a low-temperature state. Therefore, the temperature distribution of the entire freezing compartment 106 can be maintained more uniformly.

Here, the suppression of the heat absorption will be described in detail.

Usually, the heat flux Q is expressed by the following formula (1).

Q=K*A*ΔtK=1/(1/αo+1/αi+1/λ)...(1)

(Q: heat transfer rate, A: heat transfer area, K: heat transfer rate, Δt: temperature difference, αo: thermal conductivity of the outer surface, αi: thermal conductivity of the storage room, λ: thermal conductivity of the insulation wall ( Composite thermal conductivity of insulation material λ1, inner box resin λ2 and outer box steel plate λ3))

As described in this embodiment, the convex portion 129 is provided on the surface of the outer case 102 opposite to the cooling chamber 109, and the shape of the back side of the outer case 102 is concavo-convex. In the flow direction, the outer surface thermal conductivity αo becomes smaller and K becomes smaller, and as a result, the heat absorption can be suppressed.

As described above, in this embodiment, it is possible to provide a refrigerator in which the outer case 102 of the heat insulating box 101 flows through the natural convection generated from the surface of the compressor 108 whose temperature is higher than that of the outside air during operation of the refrigerator 100 . The surface is provided with a convex portion 129 that suppresses heat absorption from high-temperature natural convection, which can reduce the heat absorbed from the surface of the outer case 102, improve cooling efficiency, and reduce power consumption.

In addition, a convex portion facing the outside air side is provided on the surface of the outer case 102 . Accordingly, it is possible to form a region where the flow velocity slows down behind the convex portion 129 by simple processing without performing complicated processing. With such a configuration, since the heat conductivity in the area where the flow velocity becomes slow decreases, it is possible to suppress the heat absorbed from the outside air. Thereby, cooling efficiency is improved, and as a result, power consumption can be reduced.

In addition, by providing a plurality of protrusions 129 on the surface of the outer case 102, more regions where the flow velocity becomes slow can be formed. Therefore, it is possible to provide a refrigerator capable of suppressing heat absorbed from the surface of outer case 102, improving cooling efficiency, and reducing power consumption.

In addition, since the convex portion 129 is formed integrally with the surface of the outer case 102, no other components are required. Therefore, the convex portion 129 can be realized very cheaply without increasing the man-hours for assembly. Moreover, since the convex part 129 is continuously formed on the surface of the outer case 102 over the width direction of the refrigerator 100, the rigidity of an outer case can be improved.

In addition, the convex part 129 is the part where the high-temperature natural convection generated by the operation of the compressor 108 reaches the surface of the outer case 102 first, and is provided on the surface of the outer case 102 opposite to the cooling chamber 109 having the lowest temperature in the refrigerator 100 . Therefore, the convex portion 129 can suppress the amount of heat absorbed at the portion where the largest temperature difference occurs, and can further improve the cooling efficiency.

Specifically, as shown in FIG. 3 , at least a part of the convex portion 129 is provided between the installation surface (X portion) of the lowermost water receiving pan 114 provided in the cooling chamber 109 and the installation position of the radiation heater 113 .

That is, the convex portion 129 is provided in the vicinity of a point where natural convection starts to flow substantially parallel to the outer case 102 .

In addition, the same effect can be obtained by providing the convex portion 129 on the surface of the outer case 102 in a store room other than the freezer room 106 , for example, at a position facing the refrigerator room 104 or the vegetable room 105 .

In addition, in the present embodiment, the protrusions 129 are provided at constant intervals (equal intervals) with respect to the height direction of the outer case 102 , but the intervals may not be equal.

In addition, in the present embodiment, the convex portion 129 is provided continuously in the width direction of the refrigerator 100, but it may also be provided intermittently in the width direction of the refrigerator 100 (that is, there are no convex portions provided in the width direction of the refrigerator 100). parts).

In addition, in this embodiment, the cold air generated in the cooling chamber 109 is used as the cold air cooled by the forced convection generated by the cooling fan 112, but it may be cooled by natural convection (so-called direct cooling).

In addition, the dimension of the convex part shown in this embodiment is an example, and this invention is not limited to this dimension.

(Embodiment 2)

Fig. 6 is an enlarged view of the lower part of the refrigerator according to Embodiment 2 of the present invention.

As shown in FIG. 6 , a convex portion 129 is provided on the back surface of the outer case 102 at the bottom of the refrigerator 100 .

Next, the operation and function of the refrigerator configured as above will be described. In addition, the description of the same operations and functions as those in the first embodiment will be omitted.

Due to the natural convection generated by the operation of compressor 108, the inside of lower machine room 107 becomes negative pressure, so the outside air at the bottom of refrigerator 100 shown by the broken line arrow in FIG. 6 is drawn into lower machine room 107. As a result, along the outer case 102 at the bottom of the refrigerator 100 , an air flow from the front side to the lower machine compartment 107 inside is generated at the bottom of the refrigerator 100 .

In Embodiment 2, on the surface of outer case 102 at the bottom of refrigerator 100 , convex portion 129 extending in a direction perpendicular to the flow of air is provided. Thereby, in the flow of the air, a region where the flow speed becomes slow can be formed behind the convex portion 129 . Since the heat conductivity in the region where the flow velocity becomes slow decreases, the amount of heat absorbed can be suppressed by forming the convex portion 129 on the surface of the outer case 102 at the bottom of the refrigerator 100 . Thereby, cooling efficiency is improved, and as a result, power consumption can be reduced.

In addition, since the cold air can suppress the heating caused by the above-mentioned flow of air, and the cold air circulates while maintaining a low temperature, the temperature distribution in the entire freezer compartment 106 can be maintained more uniformly.

In addition, a convex portion facing the outside air side is provided on the surface of the outer case 102 . Accordingly, it is possible to form a region where the flow velocity slows down behind the convex portion 129 by simple processing without performing complicated processing. With such a configuration, since the thermal conductivity of the region where the flow velocity slows down decreases, heat absorption from the outside air can be suppressed. Thereby, cooling efficiency is improved, and as a result, power consumption can be reduced.

In addition, by providing a plurality of protrusions 129 on the surface of the outer case 102, more flow velocity slowing regions can be formed. Therefore, it is possible to provide a refrigerator capable of further suppressing heat absorbed from the surface of outer case 102, improving cooling efficiency, and reducing power consumption.

In addition, since the protrusion 129 is formed integrally with the back of the outer case 102, no other components are required. Therefore, the convex portion 129 can be realized very cheaply without increasing the man-hours for assembly.

In addition, by providing the convex portion 129 on the outer case 102 as shown in Embodiment 1 and providing the convex portion 129 on the outer case 102 as shown in Embodiment 2, it is possible to provide a cooling system that can further suppress heat absorption and improve cooling efficiency. Refrigerators that further reduce power consumption.

(Embodiment 3)

7 is an enlarged cross-sectional view of a cooling room and a lower machine room of the refrigerator according to Embodiment 3 of the present invention.

As shown in FIG. 7 , the difference from Embodiments 1 and 2 is that in Embodiment 3, the lower machine compartment 107 formed in the area behind the freezer compartment 106 at the bottom of the heat insulation box 101 of the refrigerator 100 In addition to the compressor 108, high-pressure side components of the refrigeration cycle such as a condenser 108a, an air cooling fan 108b for air cooling the condenser 108a, and a dryer (not shown) for removing moisture are accommodated.

Usually, refrigerator 100 is installed with an appropriate space between a wall such as a kitchen and outer box 102 on the rear side. When refrigerator 100 cools the interior, the surfaces of condenser 108a and the compressor are higher than the outside air temperature. In addition, in order to improve the heat dissipation performance of the condenser 108a, the surfaces of the condenser 108a and the compressor 108 are air-cooled by the air cooling fan 108b. As shown by the solid line arrows in FIGS. 2 and 3 , the high-temperature air after air-cooling the surfaces of the condenser 108a and the compressor 108 is discharged from the back side of the refrigerator 100 so that the user does not feel uncomfortable. As a result, an upward airflow is generated, and the space between the wall of the kitchen and the like and the outer box 102 is used as an air path, and flows from the lower machine room 107 to the top of the refrigerator 100 along the surface of the outer box 102 opposite to the cooling room 109 .

That is, in addition to the updraft generated by natural convection in Embodiment 1, in Embodiment 3, an updraft is generated by the operation of the air cooling fan 108b. Overall, as in Embodiment 1, when cooling the inside of refrigerator 100 , a large flow occurs from the lower portion of insulating door 119 to the upper rear surface of refrigerator 100 .

As described above, when the high-temperature exhaust air after air cooling the condenser 108a and the compressor flows along the surface of the outer case 102 opposite to the cooling chamber 109, the surface of the outer case 102 opposite to the cooling chamber 109 passes through the surface of the outer case 102 and the exhaust air. heated by heat exchange. In particular, since the cooling room 109 has the cooler 111 , the temperature is the lowest in the refrigerator 100 , and it absorbs more heat than, for example, other storage rooms inside the refrigerator 100 .

In addition, when a large amount of products are stored in the refrigerator 100 at a time, when a rapid cooling capacity is required, the compressor 108 is activated while operating the compressor 108 compared with the normal operation, that is, for example, the operation for maintaining the temperature in the box at a constant temperature. The heat dissipation capability of the condenser 108a is required. Therefore, the surface temperature of the condenser 108a and the compressor 108 is higher than during normal operation. At this time, the speed of the air-cooling fan 108b is increased to cool the surface of the condenser 108a and the compressor through a large air volume, so the discharged air has a larger air volume and a higher temperature than normal operation. Therefore, the amount of heat absorbed from the surface of the outer case 102 is greater than that during normal operation.

As described in Embodiment 3, the condenser 108a and the air-cooling fan 108b are installed in the lower machine room 107. Even when the air-cooling fan 108b is in operation, the protrusion 129 is provided perpendicular to the updraft, as indicated by the arrow in FIG. As shown, it is also possible to form a region where the flow velocity slows down behind the convex portion 129 . That is, the same effect as refrigerator 100 of Embodiment 1 can be acquired.

(Embodiment 4)

Fig. 8 is an enlarged lower sectional view of the refrigerator according to Embodiment 4 of the present invention.

As shown in FIG. 8 , a convex portion 129 is provided on the surface of the outer case 102 at the bottom of the refrigerator 100 .

Therefore, as mentioned above, in the case where the condenser 108a and the air cooling fan 108b are provided in addition to the compressor 108 in the lower machine room 107, the air volume discharged from the lower machine room 107 is larger than that during normal operation, and the lower machine room The negative pressure inside 107 is larger than that during normal operation. Like this, since the inside of the lower machine room 107 becomes negative pressure, the outside air at the bottom of the refrigerator 100 shown by the dotted line arrow in FIG. Outer box 102 flow. By providing the convex portion 129 on the surface of the outer case 102 in a direction perpendicular to the flow, a region where the flow velocity slows down can be formed behind the convex portion 129. Since the thermal conductivity of the region where the flow velocity slows down decreases, the amount of heat absorbed can be suppressed. Thereby, the cooling effect is improved, and as a result, the power consumption can be reduced. That is, the same effect as refrigerator 100 of Embodiment 2 can be acquired.

(other embodiments)

In Embodiments 3 and 4 above, the air-cooling fan 108b is provided in the lower machine room 107, but even if the compressor 108 and the condenser 108a are arranged in the lower machine room 107 without the air-cooling fan 108b, since the lower machine room Since the air in 107 is heated by the condenser 108a in addition to the compressor 108, convection can be generated as in Embodiments 1 and 2, so the same effects as in Embodiments 1 and 2 can also be obtained.

In addition, in Embodiments 3 and 4 above, the case where the compressor 108 and the condenser 108a are arranged in the lower machine room 107 has been described. In the chamber 107, natural convection is generated similarly to Embodiments 1 and 2. That is, the structure in which high-temperature air flows, that is, warm air is generated from the lower machine room 107 , is also included in the structure of the present invention. Therefore, the devices housed in the lower machine compartment 107 are not limited to the third and fourth embodiments described above, and the same effects as those of the above-mentioned embodiment can be obtained.

As mentioned above, although the refrigerator of this invention was demonstrated based on embodiment, this invention is not limited to these embodiment. As long as it does not deviate from the gist of the present invention, various modifications conceived by those skilled in the art are implemented in this embodiment, and configurations in which components in different embodiments are combined are included in the scope of the present invention.

Industrial availability

As described above, the refrigerator of the present invention can be applied to home use, business use, or a vegetable-only storage.

Claims (3)

1. a freezer, is characterized in that, comprising:

Heat insulating box, it has interior case, outer container and is configured at the heat-barrier material between described interior case and described outer container;

Lower mechanical room, it is arranged at the bottom of described heat insulating box;

Insulated door, the opening portion of heat insulating box described in its opening and closing;

Storeroom, it has the different multiple temperature fields be made up of described heat insulating box and described insulated door; With

In described storeroom, the back side of the storeroom that design temperature is minimum generates the cooling chamber of cold air, wherein

Described heat insulating box has heat absorption suppressing portion, and the described outer container surface of the described heat insulating box that the heating installation that this heat absorption suppressing portion is arranged at described lower mechanical room generation higher than external air temperature from running circulates, suppresses to absorb heat from described heating installation,

Described heat absorption suppressing portion is multiple protuberances that be arranged at the described outer container surface of described heat insulating box, air side towards the outside, the direction that described multiple protuberance intersects along the circulating direction with the heating installation produced from described lower mechanical room is arranged continuously, by producing the region that makes flow velocity slow down at the rear of described protuberance and reducing outer surface heat conductance

Described protuberance be arranged at relative with described cooling chamber described outer container surface at least partially, and between the setting position being arranged on the pharoid on the installed surface of the drip tray of the foot in described cooling chamber and the top of described drip tray.

2. freezer as claimed in claim 1, is characterized in that:

Also there is the compressor being arranged on described lower mechanical indoor,

The described outer container surface of the described heat insulating box that the free convection that the surface that described heat absorption suppressing portion is arranged at described compressor higher than external air temperature from running produces is circulated as described heating installation, suppresses to absorb heat from the free convection of high temperature.

3. freezer as claimed in claim 1, is characterized in that:

Also there is the condenser being arranged on described lower mechanical indoor; With

Air cooled air cooling fan is carried out to described condenser,

Described heat absorption suppressing portion is arranged at, described air cooling fan is utilized to carry out Air flow to the described condenser higher than external air temperature in running, the described outer container surface of the described heat insulating box that the Exhaust Gas becoming high temperature circulates as described heating installation, suppresses to absorb heat from the Exhaust Gas of high temperature.