JP4065420B2 - Direct cooling refrigerator - Google Patents

Description

  The present invention relates to a direct-cooling refrigerator, and more particularly, to a direct-cooling refrigerator having an improved cold air flow path structure so that a difference in internal temperature of a storage room can be minimized.

Generally, a refrigerator uses a refrigerant refrigeration cycle including a compressor, a condenser, an expander, and an evaporator to keep the inside of a storage room such as a freezing room or a refrigeration room at a low temperature. It is divided into a cold-cooled refrigerator and a direct-cooled refrigerator.
In other words, the cold-cooled refrigerator is of a type in which an evaporator is installed in a place other than the storage room and the storage room is cooled by forcibly circulating cool air with a fan. The storage room is cooled by conduction and natural convection.

  The intercooled refrigerator cools the storage room while the cold air is forced to circulate. Therefore, the temperature inside the storage room can be maintained uniformly throughout, but the flow path structure of the cold air is complicated and there is a risk of refrigerant leakage. is there. On the other hand, the direct cooling refrigerator keeps the inside of the storage room at a low temperature by conduction and natural convection, so that the temperature difference between the central part and the edge part of the storage room and the temperature difference between the upper part and the lower part are the above-mentioned cooling temperatures. Although it is larger than a refrigerator, there is an advantage that the structure is simple and there is almost no risk of refrigerant leakage.

Therefore, if a blower for forcibly circulating cool air in the storage room is attached to the direct cooling refrigerator, the internal temperature difference in the storage room can be minimized, but as an example, Kimchi of Korean Patent Registration No. 10-0302859 There is a refrigerator.
In the kimchi refrigerator, an air passage is formed in a door for opening and closing the storage chamber so that the cold air is discharged after being sucked, and the air for forcibly circulating the cold air in the storage chamber inside the air passage. By installing a motor and blower fan, the temperature difference in the storage room was minimized, and kimchi and vegetables were stored for a long time at low temperatures.

A bracket for fixing the blower motor is provided in the blower passage of the door so as to be orthogonal to the blower passage.
However, in the direct cooling refrigerator according to the related art in which the air passage is formed in this way and the air blowing motor and the air blowing fan are attached, the flow of the cold air in the storage room circulates only at the edge of the storage room. There is a problem that a temperature difference occurs between the central side and the edge of the glass.

In addition, since the blower motor and the blower fan are arranged in a row with respect to the blower passage, and the bracket for fixing the blower motor is placed so as to be orthogonal to the blower passage, flow resistance and noise increase. There was also the problem of doing.
Further, since the blower motor and the blower fan are attached to the door, the weight of the door is increased, the door opening / closing operation is not smooth, and the heat insulation performance of the door is deteriorated, so that the energy efficiency is low. There was a problem.
Korean Registered Patent Publication No. 10-0302859

The present invention has been made in view of the above-described problems of the prior art, and provides a direct cooling refrigerator that can uniformly maintain the temperature at the upper and lower portions and the temperature at the center and the edge in the storage chamber. There is a particular purpose.
Another object of the present invention is to provide a direct cooling refrigerator in which the flow path resistance and noise of cold air can be minimized.

In order to achieve the above object, a direct-cooling refrigerator according to the present invention includes an outer case; a single storage chamber disposed on the inner side of the outer case and having an open upper surface, and a refrigerant. An inner case to which a flowing refrigerant pipe is attached; a heat insulating material disposed between the inner case and the outer case; a door for opening and closing the storage chamber; and a lower portion of the storage chamber attached to the storage chamber. Blower means for circulating the cool air in the storage chamber so that the cool air at the center side is raised and the cool air at the edge of the store chamber is lowered; A plurality of air suction ports formed at the edge, and a flow path guide formed with an air discharge port and a ventilation passage communicating with the air suction port. The flow path guide has a polygonal shape. The air inlet is formed The formed at an edge central portion of the edge, inlet water proof rib to prevent the liquid to the periphery on the air inlet penetration is characterized in that it is protruded.

The direct cooling refrigerator according to the present invention has the following advantages.
1) The direct cooling refrigerator according to the present invention is stored using a blower that circulates the cool air in the storage chamber so that the cool air at the center side of the storage chamber is raised and the cool air at the edge of the storage chamber is lowered. Since the cool air in the room is circulated, the temperature between the center side and the edge can be kept uniform in addition to the temperature between the upper side and the lower side in the storage chamber.

2) A direct-cooling refrigerator according to the present invention is disposed at an inner lower portion of a storage room, and an air discharge port is formed at the center and a plurality of air suction ports are formed at an edge, and the air It further includes a flow path guide formed with a ventilation passage that communicates with the discharge port and the air suction port, so that cold air is sucked from the edge of the storage chamber and concentrated and discharged through the center of the storage chamber, resulting in a smooth flow of cold air. There is an advantage that the inside of the storage chamber is uniformly cooled.
3) The flow path guide is formed in a polygonal shape, and the air suction port is formed at the edge central portion or the apex portion of the edge portion of the flow path guide, so that the cool air circulates three-dimensionally and the inside of the storage chamber. Has the advantage of being uniformly circulated.

4) The flow path guide has a waterproof rib projectingly formed on the upper peripheral edge of the air discharge port so as to prevent liquid from entering from the air discharge port, so as to prevent liquid from entering from the air suction port. In addition, since the waterproof rib protrudes from the upper peripheral edge of the air inlet, there is an advantage that the inside of the storage chamber can be kept clean.
5) Since the flow path guide is made of a heat transfer member, there is an advantage that deterioration of cooling performance due to the flow path guide can be prevented.

6) Since the direct cooling refrigerator according to the present invention further includes a deodorizer at the air outlet, there is an advantage that food odors in the storage chamber can be efficiently deodorized.
7) Since the blower is composed of a blower motor disposed in the center of the inner bottom portion of the inner case and a blower fan provided on the rotating shaft of the blower motor, Direct discharge is easy, and there is an advantage that heat can be radiated from the blower motor by the circulated cold air.

  8) The blower is disposed below the center of the bottom of the inner case, and has a rotating shaft protruding through an opening formed in the inner case and projecting into the storage chamber, and the blower Since it is composed of a blower fan that is mounted on the motor, the flow resistance of the cold air circulating through the flow path guide is minimized, the air blowing performance is improved, and when the circulating cold air hits the blower motor There is an advantage that noise that may be generated is prevented and that the vibration and noise are minimized by being buffered by the heat insulating material.

  9) The blower is disposed in a machine room formed in the lower part of the outer case, and a rotating motor has a rotating shaft that penetrates the heat insulating material and the inner case and protrudes into the storage chamber; Since it is composed of a blower fan installed on the rotating shaft, the flow resistance of the cold air circulating through the flow guide is minimized, the air blowing performance is improved, and the circulating cold air hits the blower motor There are advantages that noise that can sometimes be generated is prevented and the heat dissipation performance of the blower motor is high.

10) In the direct-cooling refrigerator according to the present invention, a blower that circulates the cool air in the storage chamber is provided at the door so that the cool air at the center of the storage chamber is raised and the cool air at the edge of the storage chamber is lowered. A flow path guide that is mounted, has an air inlet in the center, has a plurality of air outlets at the edge, and has a ventilation passage that communicates with the air inlet and the air outlet, is provided on the door. Since it is installed, the cool air in the storage room circulates between the storage room and the door, and in addition to the temperature between the upper side and the lower side of the storage room, the temperature between the center side and the edge is uniformly maintained. .
11) Since the flow path guide is made of a heat insulating member, there is an advantage that deterioration of the heat insulating performance of the door can be prevented.

Hereinafter, embodiments of the present invention capable of specifically realizing the above object will be described with reference to the accompanying drawings.
FIG. 1 is an internal configuration diagram of a first embodiment of a direct cooling refrigerator according to the present invention.
As shown in FIG. 1, a first embodiment of a direct-cooling refrigerator according to the present invention is formed with a storage chamber 20 having an open upper surface inside an outer case 2 forming an outer shape, and a refrigerant flows through the refrigerant. An inner case 24 to which a pipe 22 is attached is disposed, and a heat insulating material 30 is disposed between the outer case 2 and the inner case 24.

A top cover 31 surrounding the upper end of the heat insulating material 30 is disposed at the upper end of the outer case 2 and the upper end of the inner case 24.
A machine room 3 is formed in the lower part of the outer case 2, and a compressor 4 that compresses the evaporated refrigerant to a high temperature and a high pressure while passing through the refrigerant pipe 22 in the machine room 3, A condenser 5 in which the compressed refrigerant is condensed by heat exchange with the surroundings, and an expansion mechanism 6 for expanding the refrigerant to a low temperature and a low pressure so that the refrigerant condensed in the condenser 5 is easily evaporated are provided. The
The condenser 5 includes a refrigerant pipe 5a through which a refrigerant passes and an electrothermal metal member 5b to which the refrigerant pipe 5a is fixed.

The inner case 24 is composed of a rectangular box whose upper surface and inside are open, and the inside becomes the storage chamber 20, and heat conduction between the refrigerant passing through the refrigerant pipe 22 and the air in the storage chamber 20 is facilitated. It consists of heat-transfer metal members, such as aluminum, and comprises an evaporator with the said refrigerant | coolant pipe | tube 22. FIG.
The inner case 24 is bent at its upper end so as to surround the upper end of the outer case 2.
The heat insulating material 30 is foamed and embedded between the outer case 2 and the inner case 24 so as to enclose both side surfaces and the bottom surface of the inner case 24.

And in a direct-cooling refrigerator, the door 32 which opens and closes the upper surface of the said storage chamber 4 is attached.
The door 32 is connected to the outer case 2 by the hinge 14, and a heat insulating material 16 is embedded inside, and a packing for preventing a cold air leak between the door 32 and the storage chamber 20 at the bottom edge of the door 32. 38 is attached.
Meanwhile, the direct-cooling refrigerator circulates the cool air in the storage chamber 20 in a three-dimensional manner so that the cool air at the center side of the storage chamber 20 is raised and the cool air at the edge of the storage chamber 20 is lowered. It further includes a blower 40 and a flow path guide 50 that guides the cold air when the blower 40 blows the cold air.

The blower 40 includes a blower motor 42 disposed at the center of the bottom of the inner case 24, and a blower fan 44 that is provided on a rotating shaft 43 of the blower motor 42.
The flow path guide 50 is formed in the lower part of the inner case 24, and an air discharge port 52 is formed at the center, and a plurality of air intake ports 54 are formed at the edge. A blower passage 56 communicating with the air inlet 52 and the air inlet 54 is formed.
The flow path guide 50 may be made of a plastic injection, but if it is made of a heat transfer metal member such as aluminum having high thermal conductivity so that heat transfer through the bottom of the inner case 24 is facilitated. preferable.

The flow path guide 50 preferably has a flat upper surface so that the storage container A in which food such as kimchi and vegetables is stored can be placed.
On the other hand, the direct cooling refrigerator is preferably provided with a deodorizing agent 57 for deodorizing odors of food in the storage room 20, and the deodorizing agent 57 is used for deodorizing cold air discharged from the air discharge port 52. It is preferable that the air discharge port 52 is provided.

FIG. 2 is a plan view showing an example of a storage chamber and a flow path guide in the first embodiment of the direct cooling refrigerator according to the present invention, and FIG. 3 is a first embodiment of the direct cooling refrigerator according to the present invention. It is a bottom view which shows an example of the flow path guide in.
The flow path guide 50 may be formed in a circular shape, but as shown in FIGS. 2 and 3, it is preferable that the flow path guide 50 is formed in a polygonal shape, particularly a quadrangular shape, corresponding to the internal shape of the inner case 24. .
Here, the air discharge port 52 is formed larger than the blower motor 42 and the blower fan 44 so as not to interfere with the blower motor 42 and the blower fan 44.

The plurality of air suction ports 54 are configured to allow the cool air at the edge of the storage chamber 20 to be sucked downward through the central portions of the front and rear and left and right sides of the flow path guide 50 when the blower fan 44 rotates. It is formed at the edge central portion of each of the 50 edges.
The air passage 56 is formed on the bottom surface of the flow path guide 50 so that the cold air sucked downward from each of the air suction ports 54 gathers in the center and is then discharged upward from the air discharge port 52. A cross shape is formed so as to communicate with each of the air discharge port 52 and the air suction port 54.
The unexplained reference numeral 58 is a discharge-port waterproofing rib formed on the air discharge opening 52 so as to prevent liquid from entering the air discharge opening 52 in the flow path guide 50. Reference numeral 59 denotes a suction port waterproofing rib that is formed to protrude from the upper peripheral edge of the air suction port 54 so as to prevent liquid from entering from the air suction port 54.

Next, the operation of the first embodiment of the direct cooling refrigerator according to the present invention configured as described above will be described.
First, when the compressor 4 is driven, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 4 is condensed by heat exchange with external air while passing through the refrigerant pipe 5a of the condenser 5, and the expansion The refrigerant is expanded into a low-temperature and low-pressure refrigerant that easily evaporates while passing through the mechanism 6, absorbs the heat of the storage chamber 20 through the refrigerant pipe 22 that constitutes the evaporator, is evaporated, and is circulated again to the compressor 4.
When the blower motor 42 is driven, the blower fan 44 causes a blowing force, and the cool air at the edge of the storage chamber 20 is blown downward along the center of the front and rear and left and right inner surfaces of the inner case 24. Then, the air is sucked into the air suction ports 54 of the flow path guide 50, respectively.

The cool air sucked into the air inlets 54 of the flow path guide 50 is guided along the air passage 56 and gathers at the lower part of the air outlet 52 which is the lower center of the storage chamber 20, and then the air. Upward discharge is performed toward the upper center of the storage chamber 20 through the discharge port 52.
The cool air discharged toward the upper center of the storage chamber 20 cools the central side of the storage chamber 20 while passing through the central side of the storage chamber 20, and hits the center of the bottom surface of the door 32.
The cold air hitting the center of the bottom surface of the door 32 cools the upper part of the storage chamber 20 while spreading in the front / rear and left / right directions, and is guided to the edge of the storage chamber 20 along the bottom surface of the door 32. The air is blown downward along the center of the front and rear and left and right inner surfaces and sucked into the air suction port 54 of the flow path guide 50.

In other words, the cool air in the storage chamber 20 circulates between the edge, lower, center, and upper portion of the storage chamber 20 to keep the internal temperature of the storage chamber 20 uniformly.
On the other hand, the cold air in the storage chamber 20 passes through the deodorizing agent 57 when discharged upward from the air discharge port 52 of the flow path guide 50, so that odors of foods and the like adhering thereto are deodorized. .
On the other hand, the present invention is not limited to the above-described embodiment, and various cold air circulation passages can be applied depending on the position of the air inlet of the passage guide 50 and the shape of the air passage.

FIG. 4 is a plan view showing another example of the storage chamber and the flow path guide in the first embodiment of the direct cooling refrigerator according to the present invention, and FIG. 5 is the first of the direct cooling refrigerator according to the present invention. It is a bottom view which shows the other example of the flow-path guide in an Example.
As shown in FIGS. 4 and 5, the flow path guide 50 ′ is formed in a polygon, particularly a quadrangle, an air discharge port 52 ′ is formed in the center thereof, and an air suction port is provided at each apex portion of the edge. A mouth 54 'is formed.

Further, a plurality of these air suction ports 54 ′ are formed so as to be symmetrical with a line connecting the apex of the flow path guide 50 ′ and the air discharge port 52 ′ interposed therebetween.
In addition, an air passage 56 'is formed on the bottom surface of the channel guide 50' so that the air discharge port 52 'and the air suction port 54' communicate with each other.
The air passage 56 ′ is configured so that the first air passage 56 a ′ formed in a cross shape on the bottom surface of the flow passage guide 50 ′ and the end of the first air passage 56 a ′ communicate with each other. The second air passage 56b ′ is formed in a square shape along the bottom edge of the guide 50 ′.

  When the flow path guide 50 ′ configured in this way is attached to the lower inner side of the storage chamber 20, the cool air at the edge of the storage chamber 20 is blown downward along the four corners of the inner case 24. Then, the cool air sucked into each of the air inlets 54 ′ of the flow path guide 50 ′ is guided along the second air passage 56b ′ and the first air passage 56a ′ to be centered at the lower part of the storage chamber 20. Are gathered at the lower part of the air discharge port 52 ′ and then discharged upward from the air discharge port 52 ′ toward the upper center of the storage chamber 20.

The cool air discharged toward the center upper side of the storage chamber 20 cools the center side of the storage chamber 20 while passing through the center side of the storage chamber 20, and hits the center of the bottom surface of the door 32.
The cold air hitting the center of the bottom surface of the door 32 cools the upper part of the storage chamber 20 while spreading in the front / rear and left / right directions, guided to the edge of the storage chamber 20 along the bottom surface of the door 32, and then again the inner case. The air is blown downward along the four corners 24 and sucked into the air inlet 54 'of the flow path guide 50'.
In other words, the cool air in the storage chamber 20 circulates between the edge, lower, center, and upper portion of the storage chamber 20 to keep the internal temperature of the storage chamber 20 uniformly.

FIG. 6 is an internal block diagram of the second embodiment of the direct cooling refrigerator according to the present invention.
In the second embodiment of the direct cooling refrigerator according to the present invention, since the configuration other than the blower is the same as the first embodiment, the same reference numerals are used for the same configurations as the first embodiment, and the detailed description thereof is as follows. Shall be omitted.
The blower 100 according to the present embodiment is disposed below the center of the bottom of the inner case 24, and the rotating shaft 101 passes through an opening hole 24 a formed in the center of the bottom of the inner case 24 and the interior of the storage chamber 20. And a blower fan 104 provided on the rotary shaft 101 of the blower motor 102.

Here, the blower motor 102 is preferably wrapped and fixed by a heat insulating material 30 below the inner case 24.
In the blower 100 according to the present embodiment, since the blower motor 102 is not provided inside the flow path guide 50 but is disposed outside the inner case 24, the flow of cold air passing through the flow path guide 50. Road resistance is minimized, air blowing performance is improved, and noise that may be generated when circulated cold air collides with the air blowing motor 102 is prevented and vibration and Noise is minimized.

FIG. 7 is an internal block diagram of a third embodiment of the direct cooling refrigerator according to the present invention.
In the third embodiment of the direct cooling refrigerator according to the present invention, the configuration other than the blower is the same as that of the first embodiment. Therefore, the same reference numerals are used for the same configurations as the first embodiment, and the detailed description thereof is as follows. Omitted.
The blower 110 of this embodiment is disposed in a machine room 3 formed in the lower part of the outer case 2, and the rotating shaft 111 has an opening hole 24 a formed in the center of the bottom of the heat insulating material 30 and the inner case 24. The blower motor 112 penetrates and protrudes into the storage chamber, and the blower fan 114 is provided on the rotating shaft 111 of the blower motor 112.

The blower motor 112 is preferably mounted in the machine room so as to be radiated by the air in the machine room and fixed to the lower end of the heat insulating material 30.
The blower 110 of the present embodiment is not installed on the cold air flow path through which the blower motor 112 is circulated, but is disposed inside the machine room 3, so that the flow resistance of the cold air that circulates through the flow path guide 50. Is minimized, the air blowing performance is improved, noise that may be generated when the circulated cool air hits the air blowing motor 112 is prevented, and the heat radiation performance of the air blowing motor 112 is improved.

FIG. 8 is an internal block diagram of the fourth embodiment of the direct cooling refrigerator according to the present invention.
As shown in FIG. 8, the fourth embodiment of the direct cooling refrigerator according to the present invention is the same as the first embodiment because the configuration other than the blower, the flow path guide, and the door is the same as the first embodiment. The same reference numerals are used for the configuration, and detailed description thereof is omitted.
In the present embodiment, the blower 120 is not installed in the lower part inside the storage chamber 20 as in the above-described embodiments, but is installed in the door 130 that opens and closes the storage chamber 20.

That is, the blower 120 according to the present embodiment is disposed at the center of the door 130, the blower motor 122 with the rotary shaft 121 protruding downward, and the blower fan 124 provided on the rotary shaft 121 of the blower motor 122. It consists of.
The door 130 is provided with a flow path guide 140 for guiding the intake and discharge of cold air.
That is, the door 130 includes a door case 132 that forms an outer shape, a heat insulating material 134 in the door case 132, and a flow path guide 140 below the heat insulating material 134.

The flow path guide 140 has an air suction port 142 formed at the center, a plurality of air discharge ports 144 formed at the edge, and a blower passage 146 communicating with the air suction port 144 and the air discharge port 144. .
The flow path guide 140 is preferably made of the same material as the heat insulating material 134 for internal heat insulation of the storage chamber 20.
On the other hand, the direct cooling refrigerator is provided with a deodorizing agent 150 for deodorizing food odors in the storage room 20, and the deodorizing agent 150 is included in the cold air sucked upward through the air inlet 142. It is preferable that the air intake port 142 is provided so that the odor can be deodorized.

FIG. 9 is a bottom view showing an example of the door and the flow path guide of the fourth embodiment of the direct cooling refrigerator according to the present invention, and FIG. 10 shows the fourth embodiment of the direct cooling refrigerator according to the present invention. It is a top view which shows an example of a flow-path guide.
The flow path guide 140 may be formed in a circular shape, but is preferably formed in a polygonal shape, particularly a quadrangular shape as shown in FIGS. 9 and 10 corresponding to the internal shape of the inner case.
The air suction port 142 is formed larger than the blower motor 122 and the blower fan 124 so as not to interfere with the blower motor 122 and the blower fan 124.

The plurality of air discharge ports 144 are arranged so that the cold air sucked from the center of the storage chamber 20 during the rotation of the blower fan 124 is discharged downward through the center side of the front and rear and left and right sides of the flow path guide 140. It is formed in the edge center part of the edge part of channel guide 140, respectively.
The air passage 146 is configured so that the cold air sucked upward through the air suction port 142 is dispersed in the front, rear, left and right sides and then discharged downward from the air discharge port 144. The upper surface is formed in a cross shape so as to communicate with the air discharge port 142 and the air suction port 144, respectively.

Next, the operation of the fourth embodiment of the direct cooling refrigerator according to the present invention configured as described above will be described.
First, the door 130 is opened to put the storage container A into the storage chamber 20, and then the door 130 is closed.
When the blower motor 122 is driven, the blower fan 124 causes a blowing force, and the cool air on the central side of the storage chamber 20 is blown upward and sucked through the air inlet 142 of the flow path guide 140. The cool air sucked in this way is dispersed in four directions along the air passage 146, and the dispersed cool air is blown downward from each of the air discharge ports 144, so that the center of the front, rear, left and right inner surfaces of the inner case 24 is Is blown downward.

The cold air blown downward along the center of the front / rear and left / right inner surfaces of the inner case 24 hits the bottom surface of the inner case 24 and then gathers at the lower center of the inner side of the storage chamber 20. After cooling the central side of the storage chamber 20 while being blown upward toward the center upper side, the air is sucked through the air inlet 142 of the flow path guide 140.
That is, the internal cold air of the storage chamber 20 circulates through the center of the storage chamber 20, the interior of the door 130, the edge of the storage chamber 20, and the lower portion of the storage chamber 20. It is held uniformly.

FIG. 11 is a bottom view showing another example of the door and the flow path guide in the fourth embodiment of the direct cooling refrigerator according to the present invention, and FIG. 12 shows the fourth embodiment of the direct cooling refrigerator according to the present invention. It is a top view which shows the other example of the flow-path guide in an example.
As shown in FIGS. 11 and 12, the flow path guide 140 ′ is formed in a polygon, particularly a quadrangle, and an air suction port 142 ′ is formed in the center of the flow path guide 140 ′. Air discharge ports 144 ′ are formed at the apex portions of the edge portion of 140 ′.

In addition, a plurality of the air inlets 144 ′ are formed so as to be symmetrical with a line connecting the apex of the flow path guide 140 ′ and the air inlet 144 ′ interposed therebetween.
Also, an air passage 146 ′ is formed on the upper surface of the flow path guide 140 ′ so that the air suction port 142 ′ and the air discharge port 144 ′ communicate with each other.
The air passage 146 ′ is configured so that the first air passage 146 a ′ formed in a cross shape on the upper surface of the flow passage guide 140 ′ and the end of the first air passage 146 a ′ communicate with each other. The second air passage 146b ′ is formed in a square shape along the upper surface edge of the guide 140 ′.

  When the channel guide 140 ′ configured as described above is provided on the door 130, the cool air at the center side of the storage chamber 20 is blown upward and is sucked through the air inlet 142 ′ of the channel guide 140 ′. The The cool air sucked in this way is guided to the first air passage 146a 'and dispersed in the front, rear, left and right sides of the flow path guide 140', and the dispersed cold air is guided to the second air passage 146b '. After moving to the apex portion of the flow path guide 140 ′, the air is discharged from each of the air discharge holes 144 ′ and blown downward along the corner portion of the inner case 24.

The cold air blown downward along the corners of the inner case 24 collides with the bottom surface of the inner case 24 and then gathers at the lower center of the inner side of the storage chamber 20 and again toward the upper center of the storage chamber 20. Then, the central side of the storage chamber 20 is cooled while being blown upward, and then circulated to the air inlet 142 ′ of the flow path guide 140 ′.
That is, the cool air in the storage chamber 20 circulates through the center of the storage chamber 20, the interior of the door 130, the edge of the storage chamber 20, and the lower portion of the storage chamber 20, while the overall temperature of the storage chamber 20 is changed. It is held uniformly.

FIG. 13 is an internal block diagram of the fifth embodiment of the direct cooling refrigerator according to the present invention.
As shown in FIG. 13, in the fifth embodiment of the direct cooling refrigerator according to the present invention, storage chambers 204 and 206 having open upper surfaces are formed inside an outer case 202 forming an outer shape, and the refrigerant is A plurality of inner cases 212 and 214 to which flowing refrigerant pipes 208 and 210 are attached are disposed, and between the outer case 202 and the plurality of inner cases 212 and 214, and the plurality of inner cases 212 and 214. A heat insulating material 216 is embedded between the two.

A top cover 217 surrounding the upper end of the heat insulating material 216 is disposed at the upper end of the outer case 202 and the upper ends of the inner cases 212 and 214.
A machine room 218 is formed in the lower part of the outer case 202, and inside the machine room 218, a compressor 220 that compresses the refrigerant evaporated while passing through the refrigerant pipes 208 and 210 to high temperature and high pressure, A condenser 222 in which the refrigerant compressed by the compressor 220 is condensed by heat exchange with the surroundings, and an expansion in which the refrigerant is expanded to a low temperature and a low pressure so that the refrigerant condensed in the condenser 222 is easily evaporated. A mechanism 224 is provided.

The condenser 222 includes a refrigerant pipe 222a through which a refrigerant passes and a heat transfer metal member 222b to which the refrigerant pipe 222a is fixed.
The refrigerant pipes 208 and 210 may be connected in series, but are preferably connected in parallel so that the respective storage chambers 204 and 206 are sufficiently cooled, and the refrigerant pipes 208 and 210 are connected in parallel. When connected, the refrigerant evaporated while passing through each of the refrigerant pipes 208 and 210 is combined, then flows into the compressor 220 and compressed, and the refrigerant expanded by the expansion mechanism 224 is dispersed. And flow into the respective refrigerant pipes 208 and 210.

The inner cases 212 and 214 are formed in the shape of a square cylinder whose upper surface and inside are open, and the inside becomes the storage chambers 204 and 206, and the refrigerant passing through the refrigerant pipes 208 and 210 and the inside of the storage chambers 204 and 206. It is made of a heat transfer metal member such as aluminum so that heat conduction of air is facilitated, and constitutes an evaporator together with the refrigerant pipes 208 and 210.
The heat insulating material 216 is foamed and embedded between the outer case 202 and the inner cases 212 and 214 so as to surround the side surfaces and the lower surface of the inner cases 212 and 214, respectively.

  In the direct cooling refrigerator of the present embodiment, a plurality of doors 226 and 228 are attached to the upper portions of the storage chambers 204 and 206, respectively, so that the doors can be opened and closed. Blowers 230, 232 for circulating the cool air in the storage chambers 204, 206 so that the cool air at the center of the storage chambers 202, 206 is raised and the cool air at the edges of the storage chambers 204, 206 is lowered, The air suction ports 234 and 236 formed in the center so that the cool air in the storage chambers 204 and 206 is sucked and discharged, and a plurality of air discharge ports 238 and 240 formed at the edges, and the air suction port 234. 236 and air discharge ports 238 and 240, and flow path guides 246 and 248 in which air passages 242 and 244 communicating with the air discharge ports 238 and 240 are formed.

That is, each of the doors 226 and 228 includes a door case 250 and 252 forming an outer shape, a heat insulating material 254 and 256 inside the door case 250 and 252, and a flow path below the heat insulating material 254 and 256. And guides 246 and 248.
Each of the blowers 230 and 232 is disposed at the center of each of the doors 226 and 228, and the blow motors 262 and 264 in which the respective rotary shafts 258 and 260 protrude downward, and the blow motors 262 and 264, respectively. , And blower fans 266 and 268 provided on the rotary shafts 258 and 260.
Each of the flow path guides 246 and 248 is preferably made of a heat insulating material for heat insulation inside the storage chambers 204 and 206.

On the other hand, the direct cooling refrigerator is provided with deodorizers 270 and 272 for deodorizing odors such as foods in the respective storage chambers 202 and 206. The deodorizers 270 and 272 are provided for the flow path guides 246 and 248, respectively. It is preferable to install in the air inlets 234 and 236 of the flow path guides 246 and 248 so that the smell in the cold air sucked upward through the air inlets 234 and 236 can be deodorized.
An unexplained reference numeral 280 is a back cover attached to the back surface of the machine room 218, and an unexplained reference numeral 282 is a ventilation hole formed in the back cover 280.

FIG. 14 is a bottom view showing an example of a plurality of doors and channel guides in the fifth embodiment of the direct cooling refrigerator according to the present invention, and FIG. 15 is a fifth view of the direct cooling refrigerator according to the present invention. It is a top view showing an example of a plurality of channel guides in an example.
Each of the flow path guides 226 and 228 may be formed in a circular shape, but may be formed in a polygon, particularly a quadrangular shape as shown in FIGS. 14 and 15 corresponding to the internal shape of the inner case. preferable.

Each of the air inlets 234 and 236 is formed larger than the blower motors 262 and 264 and the blower fans 266 and 268 so as not to interfere with the blower motors 262 and 264 and the blower fans 266 and 268.
The plurality of air discharge ports 238 and 240 are arranged so that cold air sucked from the center of the storage chambers 204 and 206 when the blower fans 266 and 268 are rotated enters the center side of the front and rear and left and right surfaces of the flow path guides 246 and 248. The flow path guides 246 and 248 are respectively formed at the edge center portions of the flow path guides 246 and 248 so as to be discharged downward.

The air passages 242 and 244 are arranged such that the cool air sucked upward through the air suction ports 234 and 236 is dispersed in the front and rear, left and right sides, and then discharged downward through the air discharge ports 238 and 240. Further, a cross shape is formed on the upper surface of the flow path guides 246 and 248 so as to communicate with the air suction ports 234 and 236 and the air discharge ports 238 and 240, respectively.
Next, the operation of the fifth embodiment of the direct cooling refrigerator according to the present invention configured as described above will be described.
First, the doors 226 and 228 are opened to put the storage container A into the storage chambers 204 and 206, and then the doors 226 and 228 are closed.

  When each of the blower motors 262 and 264 is driven, each of the blower fans 266 and 268 causes a blowing force, and the cold air at the center side of each of the storage chambers 204 and 206 is blown upward, so that the flow path guide The air is sucked through the air inlets 234 and 236 of 246 and 248, respectively. The cool air sucked in this way is guided in each of the air passages 242 and 244 and dispersed in all directions, and the dispersed cool air is discharged from each of the air discharge ports 238 and 240 to be respectively supplied to the inner cases 212 and 214. Air is blown downward along the center of the front and rear and left and right inner surfaces.

The cool air blown downward along the center of the front and rear and left and right inner surfaces of each of the inner cases 212 and 214 hits the bottom surface of each of the inner cases 212 and 214, and then the inside of each of the storage chambers 204 and 206. After gathering at the center of the lower part and cooling the central side of each of the storage chambers 204, 206 while being blown upward again toward the upper center of each of the storage chambers 204, 206, the air in each of the flow path guides 246, 248 It is circulated through the suction ports 234 and 236.
That is, the cool air in the storage chambers 204 and 206 circulates in the center of the storage chambers 204 and 206, inside the doors 226 and 228, and the edges and lower portions of the storage chambers 204 and 206, respectively. Keep the internal temperature of the entire uniform.

FIG. 16 is a bottom view showing another example of a plurality of doors and flow path guides of the fifth embodiment of the direct cooling refrigerator according to the present invention, and FIG. 17 is a diagram of the direct cooling refrigerator according to the present invention. It is a top view which shows the other example of the flow-path guide of 5 Example.
As shown in FIGS. 16 and 17, the channel guides 246 ′ and 248 ′ are formed in a polygonal shape, particularly a quadrangle, and air inlets 234 ′ and 236 are formed at the center of the channel guides 246 ′ and 248 ′. 'Is formed.

The flow path guides 246 ′ and 248 ′ have first air discharge ports 238 ′ and 240 ′ formed at the apex portions of the edges of the flow path guides 246 ′ and 248 ′, respectively, and the plurality of doors 226, Second air outlets 238 ", 240" are formed between the vertices at the edges opposite 228.
The plurality of first air discharge ports 238 ′ and 240 ′ are symmetric with a line connecting the apex of the flow path guides 246 ′ and 248 ′ and the air suction ports 234 ′ and 236 ′ in between. It is formed.
A plurality of the second air discharge ports 238 ″ and 240 ″ are formed apart from each other.

FIG. 18 is a perspective view showing a cold air flow when the cold air is discharged by another example of the flow path guide of the fifth embodiment of the direct cooling refrigerator according to the present invention.
In general, in a direct-cooled refrigerator in which a plurality of the inner cases 212 and 214 are mounted, the plurality of inner cases 212 and 214 are compared with each other where the inner cases 212 and 214 and the outer case 202 face each other. The portions facing each other are relatively superior in heat insulation performance, and in particular, even in the portions where the inner cases 212 and 214 are opposed, the central portion in the front-rear direction exhibits the most excellent heat insulation performance.

  That is, in each of the storage chambers 204 and 206, the temperature in the vicinity of the center in the front-rear direction of the portion where the plurality of inner cases 212 and 214 face each other is lower than that in the other portions. The air discharge ports 238 ″ and 240 ″ allow the cool air temperature in the storage chambers 204 and 206 to be entirely increased by rapidly circulating cool air in the vicinity of the center in the front-rear direction of the portion where the plurality of inner cases 212 and 214 are opposed to each other. Make sure it is kept uniform.

Further, as shown in FIG. 17, the air inlets 234 ′, 236 ′, the first air outlets 238 ′, 240 ′, and the second air outlet 238 are formed on the upper surfaces of the flow path guides 246 ′, 248 ′. The air passages 242 ′ and 244 ′ are formed so that “, 240” communicate with each other.
The air passages 242 ′ and 244 ′ have first air passages 242 a ′ and 244 a ′ formed in a cross shape on the upper surfaces of the flow path guides 246 ′ and 248 ′, respectively, and the first air passages 242 a ′ and 244 a ′. The second air passages 242b 'and 244b' are formed in a quadrangular shape along the upper surface edge of the flow path guides 246 'and 248' so that the end portions of the flow path guides 246 'and 248' communicate with each other.

  When the flow path guides 246 ′ and 248 ′ configured as described above are provided in the doors 226 and 228, the cool air at the center side of each of the storage chambers 204 and 206 is blown upward and the flow path guide 246. '248' is sucked through the respective air inlets 234 ', 236'. The cool air sucked in this way is guided in the first air passages 242a ′ and 244a ′ and dispersed in the front, rear, left and right sides of the flow path guides 246 ′ and 248 ′, respectively. The second air passages 242b ′ and 244b ′ are guided by the second air passages 242b ′ and 244b ′ to move to the apex portions of the flow path guides 246 ′ and 248 ′.

The cold air that has moved to the apex portions of the flow path guides 246 ′ and 248 ′ is discharged from the first air discharge ports 238 ′ and 240 ′ and downward along the corner portions of the inner cases 212 and 214. Be blown.
The cold air blown downward along the corners of each of the inner cases 212 and 214 gathers at the inner lower center of each of the storage chambers 204 and 206 after hitting the bottom surface of the inner cases 212 and 214, and again After cooling the central side of the storage chambers 204, 206 while being blown upward toward the upper center of the storage chambers 204, 206, it is circulated through the air inlets 234 ′, 236 ′ of the flow path guides 246 ′, 248 ′. The

  On the other hand, some of the cool air that is guided to the second air passages 242b ′ and 244b ′ and moves to the apex portions of the flow path guides 246 ′ and 248 ′ is the second air discharge ports 238 ″ and 240 ″. The plurality of inner cases 212 and 214 are discharged downward in the vicinity of the center in the front-rear direction of the portion facing each other to promote the circulation of cool air, thereby minimizing the temperature deviation in the storage chambers 204 and 406.

  That is, the internal cold air of the storage chambers 204 and 406 circulates in the center of the storage chambers 204 and 206, the interiors of the doors 226 and 228, the edges of the storage chambers 204 and 406, and the lower portions of the storage chambers 204 and 206. The internal temperature of the storage chambers 204 and 206 is kept uniform as a whole, and in particular, a larger amount of cold air is circulated around the center in the front-rear direction of the opposing portions of the plurality of inner cases 212 and 214, resulting in a difference in heat insulation performance. Minimize temperature deviation due to.

  On the other hand, in the fifth embodiment of the direct cooling refrigerator according to the present invention, the blower and the flow path guide are respectively attached to a plurality of doors, but the present invention is not limited to the fifth embodiment, Needless to say, the present invention can also be applied to the case where the blower and the flow path guide are attached to only a part of the plurality of doors.

It is an internal block diagram of 1st Example of the direct-cooling type refrigerator which concerns on this invention. It is a top view which shows an example of the storage chamber and flow-path guide in 1st Example of the direct-cooling refrigerator which concerns on this invention. It is a bottom view which shows an example of the flow-path guide in 1st Example of the direct-cooling type refrigerator which concerns on this invention. It is a top view which shows the other example of the storage chamber and flow-path guide in 1st Example of the direct-cooling type refrigerator which concerns on this invention. It is a bottom view which shows the other example of the flow-path guide in 1st Example of the direct-cooling type refrigerator which concerns on this invention. It is an internal block diagram of 2nd Example of the direct-cooling type refrigerator which concerns on this invention. It is an internal block diagram of 3rd Example of the direct-cooling type refrigerator which concerns on this invention. It is an internal block diagram of 4th Example of the direct-cooling type refrigerator which concerns on this invention. It is a bottom view which shows an example of the door and flow path guide in 4th Example of the direct-cooling type refrigerator which concerns on this invention. It is a top view which shows an example of the flow-path guide in 4th Example of the direct-cooling refrigerator which concerns on this invention. It is a bottom view which shows the other example of the door in the 4th Example of the direct-cooling type refrigerator which concerns on this invention, and a flow-path guide. It is a top view which shows the other example of the flow-path guide in 4th Example of the direct-cooling refrigerator which concerns on this invention. It is an internal block diagram of 5th Example of the direct-cooling type refrigerator which concerns on this invention. It is a bottom view which shows an example of the door and flow path guide in 5th Example of the direct-cooling type refrigerator which concerns on this invention. It is a top view which shows an example of the flow-path guide in 5th Example of the direct-cooling refrigerator which concerns on this invention. It is a bottom view which shows the other example of the some door in the 5th Example of the direct-cooling refrigerator which concerns on this invention, and a flow-path guide. It is a top view which shows the other example of the flow-path guide in 5th Example of the direct cooling type refrigerator which concerns on this invention. It is a perspective view which shows the cold air flow in case cold air is discharged by the other example of the flow-path guide in 5th Example of the direct cooling type refrigerator which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2,202 ... Outer case 3 ... Machine room 4 ... Compressor 5 ... Evaporator 6 ... Inflator 20, 204, 206 ... Storage chamber 22, 208, 210 ... Refrigerant pipe | tube 24, 212, 214 ... Inner case 30 ... Thermal insulation 32, 130, 226, 228 ... door 14 ... hinge 16, 134, 216, 254, 256 ... heat insulating material 18 ... packing 40, 100, 110, 120, 230, 232 ... blower 42, 102, 112, 122, 262 264 ... Blower motors 43, 101, 111, 121, 258, 260 ... Rotating shafts 44, 104, 114, 124, 266, 268 ... Blower fans 50, 50 ', 140, 140', 246, 246 ', 248, 248 '... Channel guides 52, 52', 144, 144'238, 240 ... Air outlets 54, 54 ', 142, 142', 234, 234 ', 236, 2 6 '... Air inlets 56, 56', 146, 146 ', 242, 244, 242', 244 '... Air passage 56a', 146a '... 1st air passage 56b', 146b '... 2nd air passage 57, 150, 270, 272 ... deodorant 58 ... discharge port waterproof rib 59 ... suction port waterproof rib 132, 250, 252 ... door case 238 ', 240' ... first air discharge port 238 ", 240" ... second air discharge port

Claims (5)

With an external case;
An inner case disposed inside the outer case and having a single storage chamber having an open upper surface and attached with a refrigerant pipe through which a refrigerant flows;
A heat insulating material disposed between the inner case and the outer case;
A door for opening and closing the storage room;
A blower unit that is attached to a lower portion of the storage chamber and circulates the cool air in the storage chamber so that the cool air at the center of the storage chamber is raised and the cool air at the edge of the storage chamber is lowered;
An edge is disposed so as to be substantially in contact with an inner lower portion of the inner case, an air discharge port is formed at the center, and a plurality of air suction ports are formed at the edge, and the air discharge port and A flow path guide in which a ventilation passage communicating with the air suction port is formed; and
The flow path guide is formed in a polygon,
The air suction port is formed at an edge central portion of the edge of the flow path guide, and a suction rib waterproof rib is formed to protrude from an upper peripheral edge of the air suction port. Direct cooling refrigerator.   The direct cooling refrigerator according to claim 1, wherein the direct cooling refrigerator further includes a deodorizing agent provided at the air outlet.   The said air blower is comprised from the air blower motor arrange | positioned in the center of the inner bottom part of the said inner case, and the air blower fan axially provided by the rotating shaft of the said air blower motor. Direct cooling refrigerator.   The blower means is disposed below the center of the bottom of the inner case, and has a rotation shaft protruding through an opening formed in the inner case and protruding into the storage chamber, and the blower motor The direct-cooling refrigerator according to claim 1, wherein the direct-cooling refrigerator is configured by a blower fan provided on a rotating shaft.   The blower unit is disposed in a machine room formed in a lower part of the outer case, and a blower motor having a rotating shaft that protrudes into the storage chamber through an opening hole formed in the heat insulating material and the inner case. The direct-cooling refrigerator according to claim 1, wherein the direct-cooling refrigerator is configured with a blower fan provided on a rotation shaft of the blower motor.

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