JPH0512636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerator equipped with a freezer compartment and a refrigerator compartment.

(b) Conventional technology In conventional refrigerators of this type, as shown in Utility Model Publication No. 3405/1983, cold air from the cooler is distributed and circulated between the freezer compartment and the refrigerator compartment to cool the compartments to their respective temperatures. . Further, as in, for example, Japanese Utility Model Publication No. 55-15022, freezers each having a single function were connected and used.

(c) Problems to be solved by the invention In conventional refrigerators that distribute cold air into a freezer compartment and a refrigerator compartment, there is a limit to the cooling temperature of the freezer compartment due to the necessity of cooling a relatively large capacity. Since a large amount of cold air is sent from the refrigerator to the freezer, there is a problem that the ice made in the freezer tastes bad. or,
A device that connects a freezer and a refrigerator has the problem of not only having an unsatisfactory appearance but also requiring the materials and installation space for two units.

The purpose of the present invention is to obtain a refrigerator that is not affected by the cooling capacity of the freezer compartment and the refrigerator compartment, and that takes up relatively little installation space. The purpose of the present invention is to provide a refrigerator in which the evaporation capacity of the evaporating dish is improved, and the effect of preventing frost formation on the box body is improved.

(d) Means for Solving the Problems The present invention provides a first refrigerant circuit including a freezer compartment cooler for cooling a freezer compartment and a first condenser for heating an evaporating dish, and a refrigerator compartment for cooling a refrigerator compartment. a second refrigerant circuit equipped with a second condenser for heating a second refrigerant cooler and an evaporator pan; and an evaporator pan disposed in a machine room housing compressors of both refrigerant circuits and receiving defrost water from the two coolers. A second refrigerant circuit is provided in the first refrigerant circuit.
A refrigerator is constructed that is filled with a refrigerant with a boiling point lower than that of the refrigerant circuit, and both condensers are placed on top of each other in a machine room so that the first condenser is on top of the second condenser, and an evaporation plate is placed above the first condenser. This is what I did.

Also, a heat insulating box body filled with a heat insulating material between an outer box and an inner box with a front opening, a first refrigerant circuit equipped with a freezer compartment cooler and a first condenser for cooling the freezer compartment, and a refrigerator compartment. A cooler for the refrigerator and a second
a second refrigerant circuit comprising a condenser;
A refrigerator is constructed in which the first refrigerant circuit is filled with a refrigerant having a boiling point lower than that of the second refrigerant circuit. The first capacitor is attached to the side surface, and a part of the first capacitor is located at the opening edge of the heat insulating box.

(E) Effect According to claim 1 of the present invention, by arranging both capacitors one above the other, the installation volume of the capacitors can be reduced compared to the case where the capacitors are arranged one behind the other.
In addition, compared to the second refrigerant circuit, the evaporating dish was placed above the first condenser for heating the evaporating dish in the first refrigerant circuit, which has a high operating rate and is filled with a low boiling point refrigerant. In addition to the fact that the first condenser has a higher temperature than the second condenser, it is easier to heat the condenser to a high temperature, and the heat dissipated from the second condenser can also be effectively used to heat the evaporating dish. heat dissipation can be promoted.

According to claim 2, both capacitors are attached to the surface of the outer box on the heat insulating material side so that the first capacitor is located in front of the second capacitor, and the first capacitor is located near the front of the refrigerator. Therefore, even if the refrigerator is placed in such a way that the left and right side walls and back wall of the refrigerator are close to other objects, the first condenser, which has a high operating rate and is hotter than the second condenser,
It is possible to suppress a decrease in the heat dissipation amount of the condenser, and it is possible to suppress a decrease in cooling efficiency of the first refrigerant circuit having a high operating rate.

(F) Embodiments Next, embodiments will be explained with reference to the drawings. FIG. 1 shows a front view of the refrigerator 1. The front opening of the refrigerator 1 has double doors 2 and 3, one set each on the top and bottom.
and 4 and 5, and the lowest stage is further closed by a pull-out door 6. Furthermore, doors 2, 3 and 4, 5
A control box 7 is provided in between.

FIG. 2 shows a front view of the refrigerator 1 excluding doors 2, 3, 4, and 5, and FIGS. 3 and 4 are A-A in FIG.
An A-line sectional view and a BB-line sectional view are shown, respectively.
An outer box 8 that opens to the front and an inner box 9 built into it
A heat insulating material 10 is filled between the two using an in-situ foaming method.
A heat insulating box body 11 is configured. This insulation box 1
The interior of 1 is divided into upper and lower sections by a heat-insulating partition wall 12, forming an upper chamber and a lower chamber that are mutually insulated and independent in terms of air circulation. divided into left and right, the first
A freezer compartment 14 and a second freezer compartment 15 are formed. At the back of the upper chamber, a vertical cooling chamber 17 is formed by a partition plate 16 spanning the entire left and right width, and a freezer compartment cooler 18 is vertically installed here, and further above it is located behind the partition wall 13. A main blower 19 is arranged. A second freezing chamber 15 is located at the back of the partition plate 16, and air outlets 20 and 21 are formed at the top and bottom of the partition plate 16. A second freezing chamber 15 is located at the back of the first freezing chamber 14, and air outlets 20 and 21 are formed on the side of the partition wall 13. An air outlet 22 is formed at the top, and an ice making air outlet 23 is formed below. Between the freezer compartment cooler 18 and the partition plate 16, there is a main blower 19 in front and an air outlet 2.
A heat insulating plate 25 is provided that forms a duct 24 that communicates between 0, 21, 22, and 23. Main blower 19
is a propeller fan which rotates and sucks in the cold air that has exchanged heat with the freezer cooler 18 and discharges it to the duct 24 in front,
The cool air that has been blown out and circulated through both chambers 14 and 15 is sucked through the suction port 27 at the front of the partition wall 12.

The duct 24 extends further rearward and laterally from the air outlet 22, and an auxiliary air blower 28 is provided at the end thereof, and an auxiliary air outlet 29 is provided in the partition plate 16 in front of the duct 24.
is formed. A duct 30 that communicates with the ice-making outlet 23 is further formed between the auxiliary blower 28 and the partition plate 16. The auxiliary blower 28 is a propeller fan, which rotates and forcibly sucks the cold air blown out from the main blower 19, and blows a large amount of cold air into the first freezer compartment 14 from the auxiliary blower outlet 29 and the ice-making outlet 23. The air is blown out to powerfully cool the inside of the first freezer compartment 14.

The inside of the first freezer compartment 14 is divided into upper and lower parts by a partition plate 32 attached corresponding to the ice-making outlet 23 (removed in FIG. 2), and an ice-making tray 33 is stored below the partition plate 32. It is assumed that the ice making room 34 is Partition plate 3
2 is hollow inside, and its internal space 35 communicates with the outlet 23, and a large number of outlets 36 are formed on the lower surface from the back to the front, thereby allowing the outlet 23 to flow from above the ice tray 33 below. The structure is designed to spray cold air almost uniformly. The upper surface of this partition plate 32 is used for placing frozen foods.

The lower chamber below the partition wall 12 is a refrigerator compartment 38,
Furthermore, an ice chamber 41 is formed in the upper part by a heat insulating partition plate 39 and an inner door 40. The cooling chamber 4 is separated by a partition plate 42 on the top of the refrigerator
3 is constructed, and a refrigerator compartment cooler 44 is installed vertically inside the refrigerator compartment cooler 44. A blower 4 is installed above the refrigerator compartment cooler 44.
5 is attached, and the partition plate 42 in front thereof has an extending portion 42a extending above the ice chamber 41. A heat insulating plate 48 is provided between the refrigerator compartment cooler 44 and the partition plate 42 to form a duct 47 that extends downward from both sides of the cooler 44 from the space in front of the blower 45 and opens into the refrigerator compartment 38 . The blower 45 is a propeller fan, which rotates to suck in cold air that has exchanged heat with the refrigerator compartment cooler 44 and blows it forward to the extension part 4.
The ice chamber 41 is discharged from the plurality of discharge ports 49 formed in 2a.
In addition to blowing out cold air into the refrigerator compartment 38, the cold air is also supplied to the refrigerator compartment 38 through the duct 47. The cold air that has cooled the ice room 41 flows through the suction port 50 formed in the partition plate 42, and the cold air that cools the refrigerator compartment 38 flows through the partition plate 39.
A suction duct 52 is formed on the lower surface, extends from the partition plate 42, and has a plurality of suction ports 51.
It passes through the interior and returns to the cooling chamber 43.

The lower part of the refrigerator compartment 38 is further provided with a partition plate 53 and a partition front 54.
A container 56 with an upward opening supported by a frame 55 on the door 6 is housed below the container 56, and the inside thereof is used as a vegetable compartment 57. 58 is a small container provided within the container 56. Reference numeral 60 denotes a machine room formed at the bottom of the heat insulating box 11, and a first compressor 62 and a second compressor 63 are arranged side by side on a base 61 provided at the rear inside the machine room 60. both compressors 6
2,63 Inside the machine room 60 in front are a first evaporating dish condenser 64 and a second evaporating dish condenser 65.
are arranged in a double layer, upper and lower, and the evaporating dish 66 is placed on the first evaporating dish condenser 64. Machine room 60
The top wall 67 is highly inclined to accommodate the compressors 62 and 63, and a recess 68 is formed in the top wall 67 at a position corresponding to the first compressor 62. The first compressor 62 constitutes a first refrigerant circuit including a first evaporating dish condenser 64 and a freezer compartment cooler 18;
3 constitutes a second refrigerant circuit including a second evaporating dish condenser 65 and a refrigerator compartment cooler 44.

FIG. 5 is a perspective view of the outer box 8 showing the structure in which the first refrigerant circuit and the second refrigerant circuit are assembled into the heat insulating box 11. Discharge side of first compressor 62
The high-temperature, high-pressure refrigerant discharged from D ₁ flows into the first evaporating dish condenser 64, radiates heat as it flows in a meandering direction from the back to the front, and returns to the first compressor 62 from the suction side S ₁ for lubrication. After cooling the oil,
It exits from the discharge side D ₂ again and flows into the condenser pipe 67 arranged on the insulating material 10 side in the front part of the left side of the outer box 8, and then flows into the opening edge of the outer box 8, the front part of the partition wall 13, the front part of the partition wall 12, and the partition. It flows into a condensation prevention pipe 68 that is arranged continuously at the front of the front 54, further flows through a condenser pipe 69 that is arranged at the front of the right side of the outer box 8 on the side of the insulation material 10, and then passes through a capillary tube 70. Flows into the freezer compartment cooler 18 and passes through the suction pipe 71
and returns to the suction side _S2 of the first compressor 62. The condenser pipes 67 and 69 and the condensation prevention pipe 68 constitute a first condenser 73 of a first refrigerant circuit (hereinafter referred to as 72). The first refrigerant circuit 72 is filled with refrigerant R502 (boiling point -46°C), which allows the temperature of the freezer compartment cooler 18 to be -40°C or lower. 15 can be cooled to extremely low temperatures below -30°C.

On the other hand, the high-temperature, high-pressure refrigerant discharged from the discharge side _D3 of the second compressor 63 flows into the second evaporating dish condenser 65, flows in a meandering manner from the front side to the back, and then flows to the rear of the right side of the outer box 8. A condenser pipe 76 flows into a condenser pipe 75 disposed on the heat insulating material 10 side and passes through the insulating material 10 side at the rear edge of the outer box 8.
After flowing through the condenser pipe 77 arranged on the side of the insulation material 10 at the rear of the left side of the outer box 8, it flows into the refrigerator compartment cooler 44 through the capillary tube 78, and then from the suction pipe 79 into the second condenser pipe 77. Compressa 6
Returns to the suction side _S3 of 3. These condenser pipes 75, 76, and 77 constitute a second condenser 81 of a second refrigerant circuit (hereinafter referred to as 80). The second refrigerant circuit 80 has a refrigerant R12 (boiling point -30
℃), thereby causing the refrigerator compartment cooler 44
The temperature will be about -15℃. As a result, the icehouse 4
1 to an ice temperature storage temperature such as -1°C, or to a refrigerator room 38.
can be cooled to a refrigeration temperature such as +6°C.

Next, FIG. 6 shows a longitudinal sectional front view of the refrigerator 1 of the vegetable compartment 57 portion. A roller 83 attached to the frame 55 engages with a rail 84 on the inner box 9 side, so that the door 6 can be freely pulled out. A vegetable compartment 57 within the container 56 is partitioned into left and right sides, with a small container 58 supported on the upper right side and a root vegetable compartment 85 below the container 58 for storing root vegetables such as potatoes that require relatively little cooling. Further, the entire vegetable compartment 57 is indirectly cooled by the cold air falling from around the partition plate 53.

Here, the first refrigerant circuit 72 contains a refrigerant with a low boiling point.
Since it is filled with R502, the first compressor 62 also needs to be large and have high capacity. Therefore, in order to improve air circulation within the machine room 60, the entire ceiling wall 67 must be made high, but this would reduce the volume of the refrigerator compartment 38.
In the present application, the top wall 67 in a portion corresponding to the root vegetable chamber 85 is raised to form a high portion 67a, and the first compressor 62 is further positioned on the root vegetable chamber 85 side, and a recess 68 is formed there. Although this improves ventilation in the machine room 60, the thickness of the heat insulating material 10 around the root vegetable room 85 becomes thinner. However, since the root vegetable compartment 85 stores root vegetables that can be stored at a relatively high temperature, there is no problem even if the insulation performance decreases.

In addition, the first evaporating dish condenser 64 is attached to the fixture 8.
7,87 for the second evaporating dish condenser 65
It is said to be double. Here, since the first refrigerant circuit 72 is filled with the refrigerant R502 having a lower boiling point than the refrigerant R12 of the second refrigerant circuit 80 as described above, the temperature of the refrigerant discharged from the first compressor 62 is extremely high. It becomes expensive. Therefore, the temperature of the first evaporating dish condenser 64 is lower than that of the second evaporating dish condenser 65.
temperature becomes higher than that of Here, defrosting water from the freezer compartment cooler 18 and the refrigerator compartment cooler 44 is introduced into the evaporating dish 65 through a drain pipe 88. Therefore, this defrosting water is properly heated and evaporated by the first evaporating dish condenser 64, which is at a high temperature. Also, at this time, the second evaporating dish condenser 6
5 is located below the first evaporating dish condenser 64, so it is prevented from being heated, and both evaporating dish condensers 64 and 65 can be heated well, and the cooling capacity of the refrigerant circuits 72 and 80 is good. can be maintained. Furthermore, since the condensers 64 and 65 for both evaporating dishes have a double structure, it is possible to make the machine compact and reduce the volume of the machine room 60.

Similarly, since the temperature of the refrigerant flowing through the condensation prevention pipe 68 of the first condenser 73 is relatively high, the opening edge of the heat insulating box 11 can be satisfactorily heated.
Furthermore, since the first capacitor 73 is entirely located at the front of the outer box 8, there is no need for the pipe to cross the second capacitor 81 even when the condensation prevention pipe 68 is arranged. The refrigerator 1 can also be easily installed in the refrigerator 8, and the refrigerator 1 as a whole can be made compact by such an arrangement.

Here, since the refrigerator compartment cooler 44 cools only the relatively high temperature refrigerator compartment 38, ice room 41, and vegetable compartment 57, the operating rate of the second compressor 63 decreases during low outside temperatures such as in winter. However, evaporating dish 6
6 and prevention of condensation on the heat insulating box 11 are performed by the first evaporating dish condenser 64 and condensation prevention pipe 68 of the first refrigerant circuit 72, so heating of both may become insufficient in winter, etc. do not have. On the other hand, the inside of the first freezer compartment 14 and the second freezer compartment 15 are strongly cooled by the unique freezer compartment cooler 18.
Freezing temperatures below -30℃ can be achieved.

(G) Effects of the Invention Since the present invention is configured as described above, it achieves the effects described below.

According to claim 1 of the present invention, by arranging both capacitors one above the other, the installation volume of the capacitors can be reduced compared to the case where the capacitors are arranged one behind the other.
In addition, compared to the second refrigerant circuit, the evaporating dish was placed above the first condenser for heating the evaporating dish in the first refrigerant circuit, which has a high operating rate and is filled with a low boiling point refrigerant. In addition to the fact that the first condenser has a higher temperature than the second condenser, it is easier to heat the condenser to a high temperature, and the heat dissipated from the second condenser can also be effectively used to heat the evaporating dish. heat dissipation can be promoted.

According to claim 2, both capacitors are attached to the surface of the outer box on the heat insulating material side so that the first capacitor is located in front of the second capacitor, and the first capacitor is located near the front of the refrigerator. Therefore, even if the refrigerator is placed in such a way that the left and right side walls and back wall of the refrigerator are close to other objects, the first condenser, which has a high operating rate and is hotter than the second condenser,
It is possible to suppress a decrease in the heat dissipation amount of the capacitor, and it is possible to suppress a decrease in cooling efficiency of the first refrigerant circuit, which has a higher operating rate than the second refrigerant circuit.

[Brief explanation of the drawing]

Fig. 1 is a front view of the refrigerator, Fig. 2 is a front view of the refrigerator excluding some doors, Figs. 3 and 4 are sectional views taken along the line A-A and B-B in Fig. 2, respectively. FIG. 5 is a perspective view of the outer box, and FIG. 6 is a longitudinal sectional front view of the refrigerator in the vegetable compartment. 1... Refrigerator, 8... Outer box, 9... Inner box, 10
...Insulating material, 11...Insulating box, 12...Partition wall, 14...First freezer compartment, 15...Second freezer compartment, 18...Freezer compartment cooler, 38...Refrigerating compartment ,
44...Cold room cooler, 60...Machine room, 62
...First compressor, 63...Second compressor, 64...First evaporating dish condenser, 6
5... Second evaporation dish condenser, 66... Evaporation dish, 68... Condensation prevention pipe, 72... First refrigerant circuit, 73... First condenser, 80... Second refrigerant circuit, 81...Second capacitor.

Claims (1)

[Scope of Claims] 1. A first refrigerant circuit including a freezer compartment cooler for cooling the freezer compartment and a first condenser for heating the evaporating dish; a refrigerator compartment cooler for cooling the refrigerator compartment and a first condenser for heating the evaporating dish; a second refrigerant circuit equipped with a second condenser for use in the first refrigerant circuit; and an evaporation tray disposed in a machine room housing the compressors of both refrigerant circuits and receiving defrost water from the two coolers; In a refrigerator filled with a refrigerant having a boiling point lower than that of a second refrigerant circuit, both condensers are stacked and arranged in the machine room so that the first condenser is on top of the second condenser, and the first condenser is placed above the first condenser. A refrigerator characterized in that the evaporating dish is placed in the refrigerator. 2. A heat insulating box body filled with a heat insulating material between an outer box and an inner box with a front opening, a first refrigerant circuit equipped with a freezer compartment cooler and a first condenser that cool the freezer compartment, and a refrigerator compartment. A refrigerator comprising a refrigerator compartment cooler for cooling and a second refrigerant circuit including a second condenser, the first refrigerant circuit being filled with a refrigerant having a boiling point lower than that of the second refrigerant circuit. Both capacitors are attached to the heat insulating material side surface of the outer box so that the first capacitor is located in front of the second capacitor, and a part of the first capacitor is located at the opening edge of the heat insulating box. A refrigerator that is characterized by: