JP3247721B2 - Cool storage refrigeration cycle device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative refrigerating cycle device used in, for example, a regenerative refrigerator.

[0002]

2. Description of the Related Art Generally, in a regenerative refrigerator or the like, during a regenerative operation, a high-pressure refrigerant liquefied by a compressor and a condenser is depressurized by a capillary, and the refrigerant is decompressed by a regenerative coil provided in the regenerator and the cooling chamber. Heat exchange in a cooler consisting of a regenerator and a cooling coil,
A method has been adopted in which a regenerator material whose main component is water in a regenerator room is cooled, and circulating air in the refrigerator is cooled in the cooling room.

As shown in FIG. 4, a conventional regenerative refrigeration cycle apparatus of this type includes a compressor 1, a condenser 2 connected to a discharge side of the compressor 1, and an inlet flow to the condenser 2. A four-way switching valve 4 to which a passage is connected, a first capillary 5 connected to the condenser 2 by the switching valve 4, and directly or through the first capillary 5 to the condenser 2 by the switching valve 4. A regenerator 6 connected to the regenerator 6, a three-way valve 8 connected to the regenerator 6 via a check valve 7, and a check valve 7 and a three-way valve connected to the condenser 2 via the switching valve 4. 8
Second capillary 9 connected to regenerator 6 via
And connected to the regenerator 6 via the check valve 7 and the three-way valve 8, connected to the check valve 7 via the three-way valve 8, the second capillary 9, and condensed via the switching valve 4. And a cooler 10 connected to the compressor 1.

[0004] During the regenerative cooling operation, as shown in FIG. 4, a compressor 1, a condenser 2, a first capillary 5,
A refrigeration cycle of the regenerator 6 and the cooler 10 is formed, and the refrigerant liquefied by the first capillary 5 is decompressed to a set temperature, is heat-exchanged in the regenerator 6, and the refrigerant of gas-liquid mixture in the heat exchange The heat is exchanged in the cooler 10 to be vaporized and the compressor 1
Return to

During the cooling operation, as shown in FIG. 5, a refrigeration cycle of the compressor 1, the condenser 2, the second capillary 9, and the cooler 10 is formed, and the refrigerant flows from the condenser 2 to the second capillary 9. The pressure is reduced to the set temperature and the cooler 10
, And the vaporized refrigerant returns to the compressor 1.

[0006] During the ice-cooling operation, as shown in FIG.
A refrigeration cycle of the compressor 1, the condenser 2, the regenerator 6, the second capillary 9, and the cooler 10 is formed, and the refrigerant liquefied in the condenser 2 flows directly into the regenerator 6, and cools by heat exchange. The cold storage material attached and frozen to the coil of the vessel 6 is thawed,
Further, the refrigerant is decompressed by the second capillary 9 and exchanges heat with the cooler 10, and the vaporized refrigerant returns to the compressor 1. Then, the frozen regenerator material is melted in the coil of the regenerator 6 to prevent a decrease in the cooling effect when performing cooling during the re-cooling / cooling operation.

[0007]

In the above-mentioned conventional regenerative refrigeration cycle apparatus, a check valve 7 must be connected to the outlet of the regenerator 6 and a four-way switching valve is used for switching the operation mode. It is necessary to control the switching between the four-way valve 3 and the three-way valve 8, and the circuit configuration of the refrigeration cycle is complicated, making it difficult to save space. There were many problems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the operation mode of the cold storage operation, the cooling operation, and the ice removal cooling operation can be switched only by switching the switching valve without using a check valve or a three-way valve. The present invention provides a regenerative refrigeration cycle apparatus that facilitates switching control, simplifies the circuit configuration of a refrigeration cycle, saves space, and reduces the number of circuit components.

[0009]

According to the present invention, there is provided a regenerative refrigerating cycle apparatus comprising a compressor, a condenser connected to a discharge side of the compressor, and a switching valve having an inlet passage connected to the condenser. A first capillary respectively connected to the switching valve, a second capillary and a regenerator, and a cooler having an outlet connected to the suction side of the compressor and an inlet connected to the switching valve. The switching valve connects the condenser to the inflow side of the regenerator through the first capillary and connects the outflow side of the regenerator to the cooler through the second capillary according to the regenerative cooling operation setting. The condenser is connected to the cooler through the second capillary by the cooling operation setting, and the condenser is connected to the inflow side of the regenerator by the deicing cooling operation setting, and the outflow side of the regenerator is connected to the The configuration is such that the connection is switched to the cooler via the capillary of the compressor, a refrigerating cycle of the compressor, the condenser, the first capillary, the regenerator, the cooler is formed during the cold storage / cooling operation, and the compressor, the condenser, The refrigerating cycle of the second capillary and the cooler is formed, and the refrigerating cycle of the compressor, the condenser, the regenerator, the second capillary, and the cooler is formed during the ice-cooling operation.

[0010]

The regenerative refrigeration cycle apparatus according to the present invention switches the switching valve so that the compressor, the condenser, the first
A refrigeration cycle of a capillary, a regenerator, and a cooler is formed. The liquefied refrigerant is decompressed to a set temperature by the first capillary, heat exchange is performed in the regenerator, and the gas-liquid mixed refrigerant is cooled by heat exchange. The heat is exchanged in the cooler and vaporized and returned to the compressor, cooling the regenerator and cooling the cooler. By switching the switching valve, a refrigerating cycle of a compressor, a condenser, a second capillary, and a cooler is formed during the cooling operation, and the refrigerant is depressurized by the second capillary from the condenser, cooled to a set temperature, and cooled. The heat exchange is performed in the cooler, and the vaporized refrigerant returns to the compressor and cools the cooler. By switching the switching valve, the compressor, condenser, regenerator,
Forming a second capillary, a refrigeration cycle of the cooler,
A frozen cold storage material is melted in a coil of a cold storage device to prevent a decrease in a cooling effect when performing cooling during a cold storage cooling operation.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the regenerative refrigeration cycle apparatus of the present invention will be described with reference to the drawings. Reference numeral 11 denotes a compressor, a condenser 12 connected to the discharge side of the compressor 11, a switching valve 14 having an inlet passage 13 connected to the condenser 12, and a first valve connected to the switching valve 14. A regenerator 17 having a capillary 15, a second capillary 16 and a regenerative coil, and a cooler 18 having a cooling coil having an outflow side connected to the suction side of the compressor 11 and an inflow side connected to the switching valve 14.
And

The valve body 19 of the switching valve 14 has an inlet passage.
13 is formed, a first flow path 21 connected to the inflow side of the coil of the regenerator 17 via the first capillary 15 and a second flow path connected to the inflow side of the coil of the regenerator 17 Channel 22
A third flow path 23 connected to the coil inflow side of the cooler 18 via the second capillary 16;
A fourth flow path 24 connected to the outflow side of the coil and a fifth flow path 25 connected to the inflow side of the coil of the cooler 18 are formed.

A valve body slidably provided on the switching valve body 19.
In the cold storage / cooling operation setting position 30, the inlet passage 13 and the first
A first concave portion 33 for communicating with a first port 31 for communicating with the first flow path 21 and a fourth recess 24 for communicating the fourth flow path 24 with the fifth flow path 25; A second port 32 for communicating the flow path 13 with the third flow path 23, and a second port 32 for communicating the inlet flow path 13 with the second flow path 22 at the ice-cooling operation setting position. , Fourth flow path 24 and third flow path
And a second recess 34 for communicating with the valve body 23.
Reference numeral 19 denotes a valve seat surface 35 having the first to fifth flow paths 21, 22, 23, 24, and 25 opened. The valve body 30 includes an electromagnet, an electric motor, and the like (not shown). It is slid by driving means or manual operating means.

Next, the operation of this embodiment will be described.

As shown in FIG. 1, during the regenerative cooling operation, the compressor 11, the condenser 12, and the switching valve are operated by a temperature detection operation using a thermostat for detecting the temperature of the regenerator 17 or a switching operation of the switching valve 14 by manual operation. 14 inlet channels 13, valve body
30, the first capillary 15, the coil of the regenerator 17, the fourth flow path 2 of the switching valve 14 via the first port 31 and the first flow path 21.
4, the first recess 33, the fifth flow path 25, the coil of the cooler 18,
A refrigeration cycle circuit including the compressor 11 is formed.

In this regenerative cooling operation, the refrigerant discharged from the compressor 11 is liquefied in the condenser 12, and the liquefied high-pressure refrigerant is decompressed by the first capillary 15 so as to reach a set temperature. The heat is exchanged at 17, and the refrigerant of the gas-liquid mixture is exchanged at the cooler 18 to be vaporized by the heat exchange.
Returning to 11, the regenerator 17 is cooled and the cooler 18 is cooled.

During the cooling operation, as shown in FIG.
By the temperature detection operation by the thermostat that detects the temperature of 17, or the switching operation of the switching valve 14 by manual operation,
A refrigeration cycle circuit including the compressor 11, the condenser 12, the inlet channel 13 of the switching valve 14, the second port 32 of the valve body 30, the coil of the cooler 18 via the third channel 23, and the compressor 11 It is formed.

In this cooling operation, the refrigerant discharged from the compressor 11 is decompressed in the second capillary 16 from the condenser 12, cooled to a set temperature, heat-exchanged in the cooler 18, and vaporized. The returned refrigerant returns to the compressor 11, and cools the cooler 18.

As shown in FIG. 3, during the ice-cooling operation, the compressor 11, the condenser 12, and the compressor 11 are switched by a temperature detection operation using a thermostat for detecting the temperature of the regenerator 17 or a switching operation of the switching valve 14 by manual operation. Inlet flow path 13 of valve 14, valve body
The coil of the regenerator 17 via the first port 31 of the 30 and the second flow path 22, the fourth flow path 24 of the switching valve 14, the second recess 34, the third flow path 23, A refrigeration cycle circuit including the coil and the compressor 11 is formed.

In the ice-cooling operation, the refrigerant discharged from the compressor 11 is liquefied in the condenser 12, and the liquefied high-pressure refrigerant is heat-exchanged in the regenerator 17. The refrigerant is depressurized by the cooler 18 and the second capillary 16, heat-exchanged by the cooler 18, vaporized, and returned to the compressor 11.
The frozen storage material is melted in the 17 coils to prepare for cooling during re-cooling / cooling operation.

In the above-described embodiment, the switching valve 14 is described as having a structure in which the valve element 30 slides linearly. However, the switching element 14 uses a valve element that is rotated in a rotary manner, and each of the flow paths 21, 22, 23 of the valve body 19 is used. ,twenty four,
An appropriate configuration such as a structure in which 25 is formed at a circumferential position can also be used.

[0022]

According to the present invention, the switching valve doubles as the check valve and the three-way valve, and by switching the switching valve, the liquefied refrigerant reaches the set temperature by the first capillary during the cold storage / cooling operation. It is decompressed, heat is exchanged in the regenerator, and the refrigerant in the gas-liquid mixture is exchanged in the cooler and is vaporized and returned to the compressor.In the cooling operation, the regenerator can be cooled and the cooler can be cooled. The refrigerant is depressurized by the second capillary from the condenser, cooled to the set temperature, and exchanges heat with the cooler, and the vaporized refrigerant returns to the compressor, cools the cooler, and further performs the ice-cooling operation. At times, the cold storage material that has been frozen in the regenerator coil can be melted to prevent a decrease in the cooling effect when performing cooling during re-cooling / cooling operation, so the cold storage / cooling operation without using a check valve or three-way valve Of the operation mode of Conversion can be only by switching of the switching valve, the switching control is facilitated, simplifies the circuit configuration of a refrigeration cycle, it is possible to save space, it can be reduced even number of circuits component.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a regenerative refrigerating cycle apparatus according to an embodiment of the present invention during a regenerative cooling operation.

FIG. 2 is a circuit diagram of the regenerative refrigeration cycle apparatus during a cooling operation.

FIG. 3 is a circuit diagram of the regenerative refrigerating cycle device during ice-cooling operation.

FIG. 4 is a circuit diagram of a conventional regenerative refrigerating cycle device during a regenerative cooling operation.

FIG. 5 is a circuit diagram during a cooling operation of the regenerative refrigeration cycle apparatus.

FIG. 6 is a circuit diagram of the regenerative refrigeration cycle apparatus during ice-cooling operation.

[Explanation of symbols]

 11 Compressor 12 Condenser 13 Inlet flow path 14 Switching valve 15 First capillary 16 Second capillary 17 Regenerator 18 Cooler

Claims (1)

(57) [Claims] 1. A compressor, a condenser connected to a discharge side of the compressor, a switching valve having an inlet passage connected to the condenser, and a first capillary connected to the switching valve, respectively. A second capillary and a regenerator, and a cooler having an outflow side connected to the suction side of the compressor and an inflow side connected to the switching valve. A condenser is connected via a first capillary to the inlet side of the regenerator and the outlet side of the regenerator is connected to a cooler, and the condenser is connected to the cooler via a second capillary by a cooling operation setting. The condenser is connected to the inflow side of the regenerator and the outflow side of the regenerator is connected to the cooler via the second capillary according to the ice-cooling operation setting. A refrigeration cycle of a compressor, a condenser, a first capillary, a regenerator, and a cooler is formed. During a cooling operation, a refrigeration cycle of a compressor, a condenser, a second capillary, and a cooler is formed, and deicing cooling operation is performed. A regenerative refrigeration cycle apparatus characterized by sometimes forming a refrigeration cycle of a compressor, a condenser, a regenerator, a second capillary, and a cooler.