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Auto-cascade refrigeration system, drying device with same and operation method

A technology of refrigeration system and operation method, which is applied in the direction of dry gas arrangement, dryer for static materials, refrigerator, etc., and can solve problems such as difficult adjustment, large initial investment, and complex structure

Active Publication Date: 2019-09-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing cascade heat pump system has problems such as complex structure, difficult adjustment, and large initial investment

Method used

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  • Auto-cascade refrigeration system, drying device with same and operation method
  • Auto-cascade refrigeration system, drying device with same and operation method
  • Auto-cascade refrigeration system, drying device with same and operation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as Figure 1-2 As shown, a self-cascading refrigeration system has a binary non-azeotropic refrigerant, the difference between the boiling point temperature of the two components is more than 10°C, the critical temperature of the high boiling point refrigerant is between 80°C and 200°C, and the low boiling point refrigerant The critical temperature of the agent is between 30°C and 120°C. Specifically, binary zeotropic refrigerants composed of R32, R134a, R290, R1234ze(E), R1234ze(Z), R1233zd(E), R245fa, etc. can be selected.

[0043] Such as figure 1 As shown, the self-cascading refrigeration system has a compressor 101, a condenser 102, a separation device 103, a first throttling device 110, an evaporative condenser 105, a liquid storage device 104, a second throttling device 106, and a low-temperature evaporator 107 , high temperature evaporator 112;

[0044] Wherein the exhaust outlet of the compressor is connected with the inlet of the condenser 102, and the...

Embodiment 2

[0051] Such as image 3 As shown, on the basis of Example 1, a subcooler 115 is added in the separation device 103, and the subcooler is arranged between the evaporation side outlet 105d of the evaporative condenser 105 and the inlet of the liquid storage device 104. On the flow channel and located in the upper space inside the separation device 103, it is used to condense the high boiling point components in the refrigerant gas rich in low boiling point components.

[0052] Others are the same as embodiment 1.

Embodiment 3

[0054] Such as Figure 4As shown, on the basis of Embodiment 1, a four-way reversing valve 106 is added, and a sixth control valve 117 is added between the separation device 103 and the condensing side inlet (105a) of the evaporative condenser 105; the four-way reversing valve 106 has Four ports, that is, the first port 106a, the second port 106b, the third port 106c, and the fourth port 106d, wherein the first port 106a is connected to the suction inlet of the compressor, and the second port 106b is connected to the inlet of the high-temperature evaporator 112, The third port 106c is connected to the discharge port of the compressor, and the fourth port 106d is connected to the inlet of the condenser 102 .

[0055] Others are the same as embodiment 1.

[0056] Therefore, the refrigerating system of this embodiment can make the drying device realize the forward rotation and reverse rotation of the fan 120 through the forward cycle and the reverse cycle to perform dehumidifica...

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PUM

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Abstract

The invention relates to an auto-cascade refrigeration system, in particular to an auto-cascade refrigeration system for a drying device and an operation method. The refrigeration system comprises a compressor, a condenser, a separation device, a first throttling device, an evaporation condenser, a liquid storage device, a second throttling device, a low-temperature evaporator, a high-temperatureevaporator and other refrigeration equipment as well as a valve assembly. Through the control of the valve assembly, the characteristics and setting of the auto-cascade system can be simplified, and the auto-cascade refrigeration system is capable of realizing component separation, storage, capacity adjustment and high-efficiency operation at different operating temperature stages.

Description

technical field [0001] The invention relates to a self-cascading refrigeration system, in particular to a self-cascading refrigeration system and an operation method for a drying device. Background technique [0002] When using refrigeration technology to dry materials, if the drying temperature is higher than 80°C, conventional air source heat pumps (except CO2 heat pumps) cannot achieve high-efficiency operation under high temperature rise. At this time, cascade cycles or multi-stage compression cycles are generally used. The cascade heat pump connects the two heat pump systems through the condensing evaporator. While meeting the demand for high heating temperature under the condition of large temperature rise, it also solves the problems of system design difficulties and compressor oil equalization problems that may exist in multi-stage compression. [0003] Patent CN103940156B provides a control method for a cascade heat pump drying system, which determines the system op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B7/00F25B41/04F25B41/06F25B49/02F26B9/02F26B21/00F26B21/04F26B21/08F25B41/20F25B41/31
CPCF25B7/00F25B49/022F26B9/02F26B21/002F26B21/004F26B21/04F26B21/086F25B2600/2513F25B2600/021F25B41/31F25B41/20Y02B30/70
Inventor 郑波吕如兵黄健贵梁祥飞
Owner GREE ELECTRIC APPLIANCES INC
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