JP2000283631A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerator comprising an upper refrigerating compartment, a central vegetable compartment and a lower freezing compartment in which overcooling at the lower section of a vegetable compartment is prevented by embedding a refrigerant tube for conducting refrigerant delivered from a compressor in a heat insulating partitioner between the vegetable compartment and the freezing compartment. SOLUTION: A three-way valve 19 is provided between a condenser 17 and a freezing cycle compressor 16 comprising a cooler 11 corresponding to a refrigerating compartment and a vegetable compartment 8, and a cooler 13 corresponding to a freezing compartment 9, an ice making compartment 9A and a switching compartment 9B. A snaking heat discharging pipe 18 is disposed between the three-way valve 19 and the inlet piping of the condenser 17 while being embedded in a heat insulating partitioner 6. When the temperature at the upper part of the partitioner 6 is lower than a specified level, the three-way valve 19 is switched to circulate refrigerant delivered from the compressor 16 through a radiation pipe 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to an apparatus for preventing a refrigerator from being overcooled.

[0002]

2. Description of the Related Art As shown in FIG. 1, for example, as shown in FIG. 1, a plurality of heat insulating members are provided inside a refrigerator body (also referred to as a heat insulating box) 1 in which a foam heat insulating material 4 is filled between an outer box 2 and an inner box 3. A partition 5, 6, etc. are provided to form a refrigerator compartment 7 in the upper part, a vegetable compartment 8 in the center, a freezing compartment 9 in the lower portion, and an ice making compartment 9 A on the left and right of the freezing compartment 9 and a low temperature switching compartment 9 B. A first cooler 11 for generating cold air to the refrigerator compartment 7 and the vegetable compartment 8 and a blower 12 for forced air circulation are provided in the cold air generating chamber 10 which is sectioned and provided behind the vegetable compartment 8 and switched. Another cold air generation chamber provided behind the chamber 9B includes a freezing chamber 9 and an ice making chamber 9.
A, there is a type provided with a second cooler 13 for generating cool air to the switching chamber 9B and a blower 14 for forced air circulation.

FIG. 5 shows a refrigerating apparatus (also referred to as a refrigerating cycle) of the above-described refrigerator, in which a compressor 16, a condenser (a meandering refrigerant pipe) 17, and a three-way valve for switching the traveling direction of the refrigerant. 20, a first throttle means (for example, a capillary tube) 21, a first cooler 11, and a second cooler 13 are sequentially connected by piping, and a three-way valve 20 and an inlet pipe of the second cooler 13 are connected. Between the second throttle means 22
When supplying cool air to the freezing room 9, the ice making room 9A, and the switching room 9B, the refrigerant discharged from the compressor 16 is supplied to the condenser 17, the three-way valve 20. The second throttle means 22 and the second cooler 13 flow in this order, and when supplying cool air to the refrigerator compartment 7 and the vegetable compartment 8, the three-way valve 20 is switched so that the refrigerant passing through the three-way valve 20 passes through the second cooler 13. The first cooling means 21, the first cooler 11, and the second cooler 13 flow in this order.

By the way, the temperature of the refrigerator compartment 7 is around 3 ° C., the temperature of the vegetable compartment 8 is around 7 ° C., and when the switching compartment 9B is used as a freezing compartment, the temperature is -20 ° C. or less. The temperature difference between the upper and lower portions of the heat-insulating partition member 6 becomes 20 ° C. or more, and depending on the thickness of the heat-insulating partition member 6, heat transfer between the upper and lower portions causes the vicinity of the upper surface of the heat-insulating partition member 6 to have a minus temperature zone. As a countermeasure against this, the refrigerator housed in the vegetable compartment 8 may be frozen.
When the temperature of the bottom (upper part of the heat insulating partition 6) becomes lower than a predetermined value, the sheath heater is energized to prevent freezing of the food.

[0005]

However, in the configuration using the above-described sheathed heater, not only power consumption increases but also electrical safety must be taken into consideration, and there is a problem in terms of assembly and cost. there were. Therefore, an object of the present invention is to provide a refrigerator that can maintain a vegetable room at a predetermined temperature without a sheath heater.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a first structure in which a first pipe is provided between a discharge pipe and a suction pipe of a compressor disposed in a machine room at a rear lower portion of a refrigerator main body. , A condenser, a second three-way valve, a first throttle means, a first cooler corresponding to the refrigerator compartment and the vegetable compartment, and a second cooler corresponding to the freezer compartment. While connecting a pipe in series and providing a bypass pipe provided with a second throttling means between the second three-way valve and the inlet pipe of the second cooler, the first three-way valve and the condenser are provided. A heat radiation pipe is provided between the vessel and the inlet pipe, and the heat radiation pipe is buried in the heat insulating partition between the vegetable room and the freezing room. The refrigerant discharged from the compressor is circulated. Further, the heat radiation pipe is configured to meander in the heat insulating partition.
Further, a heat transfer plate is configured to contact at least one of the upper and lower surfaces of the heat radiating pipe. Further, the heat transfer plate is made of an aluminum plate or an aluminum foil.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. 1A shows the inside of a refrigerator main body (also referred to as a heat insulating box) from the side, and FIG. 1B shows the main part of the refrigerator main body according to the present invention obliquely from the front. A refrigerator body comprising an outer box 2 made of a steel plate, an inner box 3 made of a synthetic resin, a foamed heat insulating material 4, and the like. An ice making room 9A is formed on the left and right of the upper part of the freezing room 9 while being partitioned into a vegetable room 8 and a lower freezing room 9.
A low-temperature switching chamber 9B is defined, and a first cooler 11 corresponding to the refrigerator compartment 7 and the vegetable compartment 8 and a blower 1 for forced air circulation are provided in a cold air generating chamber 10 provided behind the vegetable compartment 8.
2, a second cooler 13 corresponding to the freezing room 9, the ice making room 9A, and the switching room 9B and a cool air forced circulation are provided in another cold air generating room provided behind the switching room (freezing room) 9B. A second blower 14 is provided, and a compressor 16, a condenser 17, and the like are provided in a machine room 15 at a lower rear portion of the refrigerator main body 1, and a radiating pipe 18, which will be described later, is provided in the heat insulating partition 6. Is embedded to circulate the refrigerant discharged from the compressor 16.

FIGS. 2 and 4 show a refrigerating apparatus (refrigeration cycle) provided in the refrigerator body 1 described above. This refrigerating apparatus is provided between a discharge pipe 16a of a compressor 16 and a suction pipe 16b. , A condenser (a meandering refrigerant pipe) 17, a second three-way valve 20, a first throttle means 21, and first cooling corresponding to the refrigerator compartment 7 and the vegetable compartment 8. The second cooler 13 corresponding to the cooler 11, the freezing room 9, the ice making room 9A, and the switching room 9B is sequentially connected in series with a pipe, and the inlet pipe of the second three-way valve 20 and the second cooler 13 is connected. Between the first three-way valve 19 and the inlet pipe of the condenser 17, a meandering radiating pipe 18 is provided between the first three-way valve 19 and the inlet pipe of the condenser 17. The heat-dissipating pipe 18 is embedded in six heat-insulating partitions, and When the temperature of the upper part of the body 6 is equal to or lower than a predetermined value (for example, 3 ° C. or lower), the first three-way valve 19 is switched to circulate the refrigerant discharged from the compressor to the radiating pipe 18, The temperature is prevented from dropping too much.

The heat radiating pipe 18 embedded in the heat insulating partition 6 may be formed only in a meandering shape. In this embodiment, as shown in FIG. 4, the heat radiating pipe 18 formed in a meandering shape is used. The heat transfer plate (thin aluminum plate or aluminum foil)
24 to enlarge the heat dissipation surface, and
By being buried in, the temperature of the vegetable room 8 can be quickly reduced.

[0010]

According to the refrigerator described above, since the heat of the refrigerant discharged from the compressor is used to prevent the temperature of the vegetable compartment from dropping too much, the refrigerator is compared with a conventional refrigerator using a sheathed heater. Not only power consumption can be reduced, but also insulation measures and the like become unnecessary, so that assembling becomes easy and a safer refrigerator can be obtained.

[Brief description of the drawings]

FIG. 1A is a side sectional view showing the inside of a refrigerator body according to the present invention and a conventional example, and FIG. 1B is a perspective sectional view showing a main part of the refrigerator body according to the present invention.

FIG. 2 is a piping connection diagram No. 1 of the refrigeration cycle of the present invention.

FIG. 3 is a piping connection diagram 2 of the refrigeration cycle of the present invention.

FIG. 4 is a perspective view of a heat radiating pipe and a heat transfer plate thereof constituting a refrigeration cycle of the present invention.

FIG. 5 is a piping connection diagram of a refrigeration cycle showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body (insulated box) 7 Refrigerator room 8 Vegetable room 9 Freezer room 9A ice making room 9B Switching room 11 First cooler 13 Second cooler 16 Compressor 17 Condenser 18 Heat dissipation pipe 19 First three-way valve Reference Signs List 20 second three-way valve 21 first throttle means 22 second throttle means 23 bypass pipe

Claims (4)

[Claims] 1. A first three-way valve, a condenser, a second three-way valve, and first throttle means between a discharge pipe and a suction pipe of a compressor disposed in a machine room at a lower rear portion of a refrigerator main body. And a first cooler corresponding to the refrigerator compartment and the vegetable compartment, and a second cooler corresponding to the freezer compartment are sequentially connected in series with pipes, and the second three-way valve and the second cooler are connected. A bypass pipe provided with a second throttle means is provided between the inlet pipe and a heat radiation pipe is provided between the first three-way valve and the inlet pipe of the condenser. A refrigerator embedded in a heat insulating partition between freezer compartments, and circulating refrigerant discharged from the compressor through the heat radiating pipe when a temperature of an upper part of the heat insulating partition is lower than a predetermined value. 2. The refrigerator according to claim 1, wherein the heat radiating pipe is meandered in the heat insulating partition. 3. The refrigerator according to claim 1, wherein a heat transfer plate is brought into contact with at least one of upper and lower surfaces of the heat radiating pipe. 4. The refrigerator according to claim 3, wherein the heat transfer plate is made of an aluminum plate or an aluminum foil.