JP2000180013A - Refrigerating apparatus for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To employ a plurality of evaporators for an arbitrary chamber for a refrigeration chamber or a freezing chamber. SOLUTION: A refrigerant tube 16 derived from a condenser 14 connected with a compressor 10 is branched to a first supply tube 20 and a second supply tube 22. The first supply tube 20 is connected with a first evaporator 28 through a first inlet solenoid valve 24 and a first inlet expansion valve 26, and the second supply tube 22 is connected with a second evaporator 34 through a second inlet solenoid valve 30 and a second inlet expansion valve 32. A first exhaust tube 36 derived from the first evaporator 28 and a second discharge tube 38 derived from the second evaporator 34 are connected with a suction tube 40 connected with the compressor 10. A first outlet solenoid valve 42 and a first capillary tube 44 are parallely connected with the first discharge tube 36 of the first evaporator 28. A second outlet solenoid valve 46 and a second capillary tube 48 are parallely connected with the second discharge tube 38 of the second evaporator 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus for a refrigerator, and more particularly, to a refrigerator having a plurality of chambers such as a refrigerating room and a freezing room, wherein a single evaporator is provided in each room. The present invention relates to a refrigerating apparatus configured to be cooled by a refrigerant supplied from a compressor.

[0002]

2. Description of the Related Art A plurality of compartments such as a refrigerator room and a freezer compartment for storing items such as foods are defined inside a heat insulating box, and the items stored in each room are cooled at different temperature ranges. For example, a refrigerator shown in FIG. 2 is used in a refrigerator. In this refrigerating apparatus, as shown in the figure, a discharge pipe 12 extending from a discharge side of a compressor 10 is connected to an inlet side of a condenser 14, and a dryer 18 is connected to a refrigerant pipe 16 extending from an outlet side of the condenser 14.
Is connected. In addition, the first supply pipe 20 extends from the refrigerant pipe 16.
And the second supply pipe 22 branches, and the first supply pipe 20
A first evaporator 28 disposed in a refrigerator or freezer via an inlet solenoid valve 24 and a first inlet expansion valve (decompression means) 26
The second supply pipe 22 is connected to an inlet of a second evaporator 34 disposed in a freezing room or a refrigerator room via a second inlet solenoid valve 30 and a second inlet expansion valve (decompression means) 32. Connected to the side. A first discharge pipe 36 derived from the refrigerant outlet side of the first evaporator 28 and a second discharge pipe 38 derived from the refrigerant outlet side of the second evaporator 34 are connected to the suction side of the compressor 10. Each is connected to a suction pipe 40.

In the refrigerating apparatus having the above-described structure, the high-pressure and high-temperature vaporized refrigerant compressed by the compressor 10 is discharged from the discharge pipe 12.
The liquefied refrigerant is supplied to the condenser 14 via the condenser 18 and is condensed. The condensed liquefied refrigerant is branched and supplied to the first supply pipe 20 and the second supply pipe 22 via the dryer 18 disposed in the refrigerant pipe 16. The first inlet solenoid valve 24 of the first supply pipe 20 and the first
The decompressed liquefied refrigerant is supplied to the first evaporator 28 through the inlet expansion valve 26, and in the first evaporator 28, heat exchange is performed by expanding and vaporizing the liquefied refrigerant.
The room is cooled by the cool air that has exchanged heat with the room 8. Similarly, the liquefied refrigerant depressurized through the second inlet solenoid valve 30 and the second inlet expansion valve 32 of the second supply pipe 22 is supplied to the second evaporator 34.
And the liquefied refrigerant expands and vaporizes in the second evaporator 34, thereby performing heat exchange. The room is cooled by the cool air that has exchanged heat with the second evaporator 34. The vaporized refrigerant whose temperature has increased due to heat exchange between the two evaporators 28 and 34 is the first refrigerant.
After returning to the compressor 10 through the discharge pipe 36, the second discharge pipe 38, and the suction pipe 40, the compressor 10 compresses the compressor 10 to a high pressure and a high temperature, and then recirculates.

[0004]

In the refrigerating apparatus, the first inlet solenoid valve 24 and the second inlet solenoid valve 30 are connected to the room temperature of a refrigerator or freezer in which the corresponding evaporators 28 and 34 are disposed. By controlling the opening and closing based on the temperature detected by a temperature detecting means such as a thermostat or a thermistor, the temperature of each room can be controlled individually. However, there is no problem when both the first evaporator 28 and the second evaporator 34 are arranged and used in the same refrigerator compartment or freezer compartment. In the case where the evaporator 34 is used in the freezing room or the first evaporator 28 is used in the freezing room and the second evaporator 34 is used in the refrigerator, the evaporation pressure of the evaporator provided in the refrigerator is low. It becomes too much. For this reason, there has been a problem that the amount of frost on the evaporator provided in the refrigerating compartment is increased, and that the articles stored in the refrigerating compartment are dried.

[0005] Therefore, a capillary tube is provided in the discharge pipe on the outlet side of the evaporator provided in the refrigerator to control the flow rate of the refrigerant so that the evaporation pressure of the evaporator is kept high. Suggestions have been made to address the problem. However, in this case, the evaporator provided with the capillary tube is dedicated to the refrigerator compartment, and the evaporator not provided with the capillary tube is dedicated to the freezer compartment, and any combination cannot be selected. Was. That is, in a refrigerator having a plurality of refrigerators and freezer compartments, there is a request to use the refrigerator compartment as a freezer compartment after the evaporator is assembled, or to use the freezer compartment as a refrigerator compartment. Could not respond to request.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to preferably solve the problem. A plurality of evaporators are provided in a refrigerator or freezer. An object of the present invention is to provide a refrigerator for a refrigerator that can be used for any room.

[0007]

[MEANS FOR SOLVING THE PROBLEMS]
In order to appropriately achieve the intended purpose, a refrigerator for a refrigerator according to the present invention supplies a high-pressure, high-temperature vaporized refrigerant compressed by a compressor to a condenser, and a liquefied refrigerant condensed by the condenser. A refrigeration system in which the refrigerant expanded and vaporized through each of the decompression means is supplied to a corresponding one of the evaporators, and the vaporized refrigerant whose temperature has increased by exchanging heat in all the evaporators is returned to the compressor. The apparatus is characterized in that a solenoid valve and a pressure adjusting means are connected in parallel to each of a suction pipe connected to a suction side of the compressor and a discharge pipe connected to a refrigerant outlet side of each evaporator.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a refrigerator according to the present invention. Note that the same components that have already been described in the conventional refrigeration apparatus described with reference to FIG. 2 are indicated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a schematic configuration of a refrigeration apparatus according to an embodiment. A first discharge pipe 36 extending from the refrigerant outlet side of the first evaporator 28 has a first outlet solenoid valve 42 and a pressure adjusting means. And the first capillary tube 44 are connected in parallel. In addition, a second outlet solenoid valve 46 and a second capillary tube 48 as pressure adjusting means are connected in parallel to a second discharge pipe 38 which is led out from the refrigerant outlet side of the second evaporator 34. When the evaporators 28 and 34 are used for a refrigerator, the outlet solenoid valves 42 and 46 are used.
Is closed. That is, in this state, the refrigerant flows through the capillary tubes 44 and 48 to control the flow rate (the refrigerant flow rate is reduced). Therefore, the evaporation pressure in the evaporators 28 and 34 can be kept high, and the high evaporation temperature can be maintained. can get. When the evaporators 28 and 34 are used for a freezing room, the outlet solenoid valves 42 and 46 are opened. In this state, the refrigerant flows bypassing the capillary tubes 44, 48, so that the evaporation pressure in the evaporators 28, 34 can be reduced, and a low evaporation temperature can be obtained.

[0010] The first discharge pipe 36 is provided with the first evaporator 28.
Temperature sensing part 5 for detecting the refrigerant temperature at the refrigerant outlet side
0 is provided, and the throttle control of the first inlet expansion valve 26 is performed based on the temperature detected by the first temperature sensing section 50. The second discharge pipe 38 is provided with a second temperature sensing part 52 for detecting the refrigerant temperature at the refrigerant outlet side of the second evaporator 34, based on the temperature detected by the second temperature sensing part 52. The throttle control of the second inlet expansion valve 32 is configured to be performed. The means for controlling the expansion valves 26 and 32 is not limited to the temperature sensing part for detecting the refrigerant temperature at the refrigerant outlet side, but may be a means for detecting the refrigerant pressure.

[0011]

Next, the operation of the refrigerating apparatus according to the embodiment will be described in the case where the first evaporator 28 is used for a refrigerator room and the second evaporator 34 is used for a freezer room. I do. In this case, the first outlet solenoid valve 42 is closed and the second outlet solenoid valve 46 is opened.
When the cooling operation of the refrigerator is started in this state, the high-pressure and high-temperature vaporized refrigerant compressed by the compressor 10 is discharged from the discharge pipe 1.
The liquefied refrigerant is supplied to the condenser 14 via the condenser 2 and condensed. The liquefied refrigerant is dehumidified by the dryer 18 of the refrigerant pipe 16 and then branched and supplied to the first supply pipe 20 and the second supply pipe 22. The liquefied refrigerant supplied to the first supply pipe 20 is the first refrigerant.
Through the inlet solenoid valve 24 and the first inlet expansion valve 26, the first
It is supplied to the evaporator 28. In the first evaporator 28, the liquefied refrigerant decompressed through the first inlet expansion valve 26 expands and vaporizes, thereby performing heat exchange, and the cold room contacting the evaporator 28 cools the refrigerator compartment. The vaporized refrigerant whose temperature has increased due to heat exchange in the first evaporator 28 returns to the compressor 10 via the first capillary tube 44 and the suction pipe 40 of the first discharge pipe 36. In this case, since the vaporized refrigerant flows through the first capillary tube 44, the evaporation pressure in the first evaporator 28 is kept high, and a high evaporation temperature is obtained, so that the amount of frost in the first evaporator 28 is reduced. It is suppressed that the number of items increases or the stored items in the refrigerator compartment dries.

The liquefied refrigerant branched and supplied to the second supply pipe 22 is supplied to the second evaporator 34 via the second inlet solenoid valve 30 and the second inlet expansion valve 32. In the second evaporator 34, the liquefied refrigerant decompressed through the second inlet expansion valve 32 expands and vaporizes, thereby performing heat exchange, and the freezing chamber is cooled by the cool air that comes into contact with the evaporator 34. The vaporized refrigerant whose temperature has increased due to heat exchange in the second evaporator 34 returns to the compressor 10 via the second outlet solenoid valve 46 of the second discharge pipe 38 and the suction pipe 40. In this case, the vaporized refrigerant is supplied to the second capillary tube 48.
By bypassing and flowing through the second outlet solenoid valve 46, the evaporating pressure of the second evaporator 34 is reduced and a low evaporating temperature is obtained, so that the cooling of the freezing room in the second evaporator 34 is efficient. Achieved.

That is, in the refrigerating apparatus of the embodiment, the outlet solenoid valves 42, 4 are connected to the discharge pipes 36, 38 of the evaporators 28, 34.
6 and the capillary tubes 44 and 48 are connected in parallel. Therefore, when the evaporators 28 and 34 are used for a refrigerator, the outlet solenoid valves 42 and 46 are closed, and when the evaporators 28 and 34 are used for a freezer, the outlet solenoid valves 42 are used. , 46 may be opened.
Therefore, the first outlet solenoid valve 42 and the second outlet solenoid valve 46
In the refrigerating apparatus of the embodiment,
The following combinations of the refrigerator compartment and the freezer compartment can be set.

[0014]

As described above, in the refrigerating apparatus according to the embodiment, after the evaporators 28 and 34 are assembled to the refrigerator, the open / close state of the first outlet solenoid valve 42 and the second outlet solenoid valve 46 is changed to thereby provide the refrigerator compartment. It is easy to use the evaporators 28, 34 for the freezer compartment or to use the evaporators 28, 34 for the freezer compartment for the refrigerator compartment.

In the above embodiment, the case where two evaporators are cooled by one compressor has been described. However, the number of evaporators may be three or more. The same number of inlet solenoid valves, inlet expansion valves, capillary tubes (pressure adjusting means), and outlet solenoid valves as are provided. When a plurality of evaporators are cooled by one compressor, it is necessary to select a compressor having a necessary capacity when all the evaporators are used for a freezing room. Further, the pressure adjusting means provided in the discharge pipe is not limited to the capillary tube of the embodiment, and if the flow rate of the refrigerant can be controlled, the evaporating pressure control valve and the discharge pipe may have a pipe diameter. A resistance portion or the like formed in another different pipe or discharge pipe to reduce the diameter of the discharge pipe can be employed. Further, in the embodiment, the expansion valve is used as the pressure reducing means for reducing the pressure of the liquefied refrigerant supplied from the refrigerant pipe. However, a capillary tube may be used.

[0017]

As described above, according to the refrigerator of the present invention, since the solenoid valve and the pressure adjusting means are connected in parallel to the discharge pipe of each evaporator, the evaporator is connected to the refrigerator. By simply changing the open / close state of the solenoid valve after assembly, it is possible to easily change the evaporator for the refrigerator to the refrigerator or the evaporator for the refrigerator to the refrigerator. By combining the open / closed state of multiple solenoid valves,
Any combination can be selected for each evaporator for the refrigerator compartment and the freezer compartment. Moreover, each evaporator is for the refrigerator compartment,
When used in any of the freezer compartments, each can be operated at an appropriate evaporation pressure, so that, for example, an increase in the amount of frost in the evaporator for the refrigerator compartment or drying of the stored matter is prevented. You.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a refrigeration apparatus according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Compressor, 14 Condenser, 26 1st inlet expansion valve (pressure reducing means) 28 1st evaporator, 32 2nd inlet expansion valve (pressure reducing means), 3
4 second evaporator 36 first discharge pipe, 38 second discharge pipe, 40 suction pipe 42 first outlet solenoid valve, 44 first capillary tube
(Pressure adjusting means) 46 second outlet solenoid valve, 48 second capillary tube
(Pressure adjusting means)

Claims (1)

[Claims] A high-pressure, high-temperature vaporized refrigerant compressed by a compressor (10) is supplied to a condenser (14), and the liquefied refrigerant condensed in the condenser (14) is supplied to a plurality of pressure reducing means (26, 32), the refrigerant expanded and vaporized via each pressure reducing means (26, 32) is supplied to each corresponding evaporator (28, 34), and heat is exchanged in all evaporators (28, 34). In the refrigeration system for returning the vaporized refrigerant whose temperature has increased to the compressor (10), a suction pipe (40) connected to a suction side of the compressor (10) and a refrigerant outlet side of each evaporator (28, 34). A refrigerating device for a refrigerator, wherein solenoid valves (42, 46) and pressure adjusting means (44, 48) are connected in parallel to discharge pipes (36, 38) connecting the two.