JPS6215741Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator in which the freezer compartment is cooled by forced circulation of cold air, and is provided with a quick-freezing compartment that provides rapid and efficient cooling within the freezer compartment.

Generally, a cold air forced circulation type refrigerator is constructed as shown in FIGS. 1 and 2. That is,
A cooling chamber 2 is provided in the deep part of the freezing chamber 1, and this cooling chamber 2
The primary cooler 3, fan 4, etc. are stored in the cooling chamber 2.
A cold air outlet 5 is provided in the upper part of the cooler, and as the fan 4 rotates, the air cooled by the primary cooler 3 is blown out from the cold air outlet 5 into the freezer compartment 1 and sucked in from the cold air intake 6 to force cold air. The freezer compartment 1 is cooled by circulation. In this freezing chamber 1, a quick freezing chamber 10 is formed near the cold air outlet 5, which is divided by an inner door 7, a shelf board 8, and a partition plate 9. 11 etc., ice making is performed. However, in this conventional method, cooling was performed only by forced circulation of cold air, so it had the disadvantage that it took a long time to cool down.
For example, when an ice cube tray 11 filled with room temperature water is placed in the quick freezing chamber 10 and cooled, it takes about two hours to make ice.

The present invention was developed in view of the above points, and involves rolling and welding two plates with good thermal conductivity, and creating a refrigerant passage section in the form of a circuit network with a plurality of entrances and exits on both sides between the two plates. A bulging roll-bonded horizontal plate-like portion, a riser pipe portion in which a plurality of entrances and exits on both sides of the refrigerant passage portion are connected together in one place, and a riser pipe portion connected to the other end side of the riser pipe portion. A thermosiphon type heat pipe secondary cooler is provided, which consists of a horizontal pipe body with heat dissipation fins attached to the outside, and a thermosiphon type heat pipe in which refrigerant circulates between these parts. A rapid freezing chamber is provided by installing heat dissipating fins at the cold air outlet in the freezing chamber to provide quick and efficient cooling.

Hereinafter, one embodiment of the present invention will be described based on the drawings from FIG. 3 to FIG. 9. Figures 3 and 4
In the figure, 12 is the refrigerator main body, and this main body 12
The interior is divided into an upper freezer compartment 14 and a lower refrigerator compartment 15 by a partition plate 13. An upper door 16 and a lower door 17 are pivotally attached to the front surfaces of each of the freezer compartment 14 and the refrigerator compartment 15 so as to be openable and closable.
A cooling chamber 20 is provided on the back side of the freezing chamber 14 and is divided by a rear partition plate 18 and a back plate 19 of the main body 12. A compressor and a capillary reach tube (not shown) are installed in the cooling chamber 20. A primary cooler 21, a fan 22, a fan motor 23, an accumulator (not shown), etc., which perform a cooling effect by the cooling system, are housed. At the upper part of the rear partition plate 18, in a portion facing the fan 22 and on both sides thereof, a cold air outlet 25 having guide blades 24 cut and raised integrally is formed. A secondary cooler 26 consisting of a thermosiphon type heat pipe unique to the present invention is provided in front of the cold air outlet 25 with a predetermined gap 27 therebetween. Note that this gap 27 may be eliminated and the secondary coolers 26 may be provided closely together. The secondary cooler 26
are formed as shown in FIGS. 5 to 9. In these figures, 28 is a horizontal part 29;
It is a horizontal plate-shaped portion consisting of a rising portion 30 that is bent at the rear edge of this horizontal portion 29. This horizontal plate-shaped portion 28 is made by applying carbon powder to one of the opposing surfaces of two rectangular plates made of a material with good thermal conductivity such as aluminum or copper to form a circuit network. The refrigerant passage portion 31 is formed by rolling and welding the refrigerant passage portion 31 by rolling and welding the refrigerant passage portion 31 by bulging the circuit network portion coated with the carbon powder at a high temperature. The refrigerant passage portion 31 is formed to communicate with the heat-absorbing refrigerant passage 32 formed in the horizontal portion 29 at three locations on both sides of the heat-absorbing refrigerant passage 32, and to open at an edge of the rising portion 30. Connecting refrigerant passages 33a, 33b, 33c,
33d, 33e, and 33f, and a refrigerant (for example, a fluorocarbon refrigerant such as R12) 34 is inside.
is included. Connecting refrigerant passages 33a, 33b, 33c, 33d, 33 of the horizontal plate-shaped portion 28
At the open ends of e and 33f, there are two riser pipe parts 3.
Three branch pipes 36a, 36b, 36c, 36d, 36e, 36 formed on the lower end side of 5a, 35b
f are connected to each other in communication.

Note that the lower ends of the riser pipe bodies 35a, 35b are connected to three branch pipes 36a, 36b, 36c, 36.
d, 36e, and 36f, but the present invention is not limited to this, and any structure may be used as long as it communicates with a plurality of locations of the heat-absorbing refrigerant passage 32 of the horizontal plate-shaped portion 28. For example, Figures 10, 11 and 12
As shown in the figure, the lower end portions of the rising pipe bodies 35a and 35b are bent along the edge of the horizontal plate-like portion 32, and communication holes 38 are formed in the bent portions 37a and 37b.
a, 38b, 38c, 38d, 38e, 38f are bored, and connecting refrigerant passages 36a, 36b,
The opening ends of 36c, 36d, 36e, and 36f may be connected.

The upper end sides of the two rising pipe parts 35a and 35b are communicated with each other by a horizontal pipe part 39, and a large number of heat radiation fins 40 are attached to the outside of this horizontal pipe part 39. The secondary cooler 26 configured as described above functions as a thermosiphon as follows. That is, the refrigerant 3 in the horizontal plate-like portion 28
1 takes heat from the refrigeration load and vaporizes, this vaporized refrigerant 31 flows through the connecting refrigerant passages 33a, 33.
b, 33c, 33d, 33e, 33f, and the horizontal pipe part 39 via the rising pipe parts 35a, 35b.
Move to. Then, when the cool air hits the radiation fins 40, 40, .
It returns to the horizontal plate-like portion 28 via a, 33b, 33c, 33d, 33e, and 33f. Repeat this below.

As shown in FIGS. 3 and 4, the upper half of the freezer compartment 14 is partitioned into an ice making compartment 42 and a quick freezing compartment 43 by a vertical partition plate 41. Locking protrusions 45, 45 are formed on the partition plate 41 and the right inner surface 44 of the freezer compartment 14 in the figure, respectively.
The horizontal plate portion 28 of the secondary cooler 26 is removably locked to the locking protrusions 45, 45.
The heat radiation fins 40, 40...40 attached to the horizontal tube part 39 of the secondary cooler 26 are connected to the cold air outlet 2.
It is temporarily set up on 5th. Reference numeral 46 designates a shelf board that partitions the freezer compartment 14 into a middle freezer compartment 47 and a lower freezer compartment 48 and allows cold air to pass therethrough. Inner doors 49 and 50 are provided in front of each of the quick freezing chamber 43 and the lower freezing chamber 48. A bottom partition plate 51 is integrally formed with the rear partition plate 18, and a cold air passage 52 is formed between the bottom partition plate 51 and the middle partition plate 13. This cold air passage 52
A cold air inlet 53 communicating with the lower freezing chamber 48 is formed at one end, and a cold air inlet 53 communicating with the lower freezing chamber 48 is formed at the other end.
Connected to 0. 54 is a communication hole for sending a part of the cold air passing through the cold air passage 52 to the refrigerator compartment 15;
This is a communication hole for returning cold air to 0.

Next, the operation of the present invention will be explained.

The cold air cooled by the primary cooler 21 of the cooling chamber 20 is sucked upward by the fan 22 and sent to the freezing chamber 14 from the cold air outlet 25. This cold air is
It passes through the gap 27, and a part of it passes through the heat dissipation fins 40, 40...40 of the secondary cooler 26 as shown by arrow A in the center of FIG.
The remaining cold air enters the quick freezing chamber 43 while being cooled, and then goes to the middle freezing chamber 47, and the remaining cold air is sent to the riser pipe parts 35a, 35 of the secondary cooler 26 as shown by arrow B in the figure.
b, horizontal pipe body part 39 and radiation fins 40...40
After hitting the , it goes to the middle freezer compartment 47 , then passes through the lower freezer compartment 48 and the cold air intake port 53 to the cooling compartment 2 .
Return to the primary cooler 21 in 0.

The cold air thus cooled by the primary cooler 21 is forcibly circulated within the freezer compartment 14 by the fan 22. As described above, since highly cooled air is guided to the quick freezing chamber 43, the quick freezing chamber 43
The inside cools down rapidly. Furthermore, quick freezing chamber 43
When a refrigeration load, for example an ice-making tray 56, is housed in the refrigerator, the refrigerant 31 sealed in the refrigerant passage 31 of the horizontal plate-shaped portion 28 of the secondary cooler 26 forming the bottom plate of the quick-freezing chamber 43 is used to make ice. The refrigerant 34 evaporates due to the temperature of the tray 56, and the heat of evaporation takes away the temperature of the ice tray 56, and the evaporated refrigerant 34 flows into the riser pipe body 35.
a, 35b, and rises to the horizontal pipe body part 39. This horizontal pipe body part 39 has a large number of heat radiation fins 40, 4.
0...40 are installed, and the cold air from the cold air outlet 25 is forcedly circulated there, so the refrigerant 34 that has risen is cooled and liquefied, and returns to the refrigerant passage section 31 of the horizontal plate section 28. . At this time, since the lower end sides of the riser tubes 35a and 35b are branched and communicated with multiple locations in the refrigerant passage 31, the refrigerant 34 mutually circulates between the refrigerant passage 31 and the horizontal tube 39. movement becomes smooth, and the cooling effect is promoted. As described above, the ice tray 56 in the quick freezing chamber 43 is rapidly cooled by both the cold air from the cold air outlet 25 and the secondary cooler 26. For example, when making ice from water at room temperature, it took nearly two hours in the conventional example shown in Figs. 1 and 2, but when the secondary cooler 26 of the present invention is installed, it takes only 30 minutes. Nakatsuta. Moreover, the horizontal plate-shaped portion 28 of the secondary cooler 26 has a locking protrusion 45,
45, it is easy to remove and clean, and it is also easy to take out and take out frozen loads such as food and ice cube trays 56.

As described above, the refrigerator according to the present invention is produced by rolling and welding two plates with good thermal conductivity, and forming a refrigerant passage section in the form of a circuit network with a plurality of entrances and exits on both sides between the two plates. Since it is provided with a roll-bonded horizontal plate-shaped portion, it is not only easy to place refrigerated loads such as food and ice cube trays, but also heat can be effectively and efficiently removed from the refrigerated loads. In other words, since the horizontal plate-shaped part itself forms the refrigerant passage part, the heat exchange effect between the refrigeration load and the refrigerant becomes efficient.Furthermore, the refrigerant passage part is formed in the shape of a circuit network, and multiple The entrances and exits at each location are connected to the horizontal pipe section through the riser pipe section, so even if frozen foods are unevenly distributed, the refrigerant moves on the heat absorption side and the refrigerant between the heat absorption side and the heat radiation side. This is because the movement becomes smoother.

Furthermore, since the plurality of heat dissipation fins attached to the horizontal pipe body are provided adjacently to the cold air outlet, heat radiation of the refrigerant rising to the horizontal pipe body becomes effective and efficient.
Therefore, rapid and efficient cooling can be performed in the quick freezing chamber.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing a conventional refrigerator;
The figure is a front view with the outer door removed in figure 1,
The figure is a side sectional view showing an embodiment of the refrigerator according to the present invention, FIG. 4 is a front view with the outer door of FIG. 3 removed, and FIGS. 5, 6, 7, and 8. and Fig. 9 shows the secondary cooler, Fig. 5 is a front view, and Fig. 6 shows the secondary cooler.
The figure is a plan view, FIG. 7 is a side view, FIG. 8 is an enlarged sectional view taken along the line A-A in FIG. 6, FIG. 9 is an enlarged sectional view taken along the line B-B in FIG. 5, FIGS. Figures 12 and 12 show other embodiments, with Figure 10 being a front view and Figure 11 being a front view.
The figure is a partial plan view, and FIG. 12 is an enlarged sectional view taken along the line CC in FIG. 11. 1, 14... Freezer compartment, 3, 21... Primary cooler, 5, 25... Cold air outlet, 26... Secondary cooler, 28... Horizontal plate-shaped part, 31... Refrigerant passage part,
34...Refrigerant, 35a, 35b...Rising pipe body part, 39...Horizontal pipe body part, 40...Radiating fin.

Claims (1)

[Claims for Utility Model Registration] (1) In a refrigerator that forcibly circulates cold air by sending cold air cooled by a primary cooler into a freezing chamber through a cold air outlet, A roll-bonded horizontal plate-shaped part is formed by rolling and welding two plate materials and forming a refrigerant passage section in the form of a circuit network with a plurality of entrances and exits on both sides between the two plate materials; It consists of a riser tube section that connects multiple entrances and exits on both sides at one place, and a horizontal tube section that is connected to the other end of this riser tube section and has a plurality of heat dissipation fins attached to the outside. ,
A thermosiphon type heat pipe secondary cooler is installed in which the internal refrigerant circulates between the refrigerant passage, the riser pipe, and the horizontal pipe.
A refrigerator characterized in that a quick freezing chamber is provided by providing a heat dissipating fin of a horizontal tube body portion of the secondary cooler at a cold air outlet in the freezing chamber. (2) The refrigerator according to claim 1, wherein the horizontal plate-shaped portion of the secondary cooler is removably locked in the freezer compartment.