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Double-temperature-rising cascading-type heat pump

A cascading, temperature-rising technology, applied in the field of heat pumps, can solve problems such as low energy efficiency ratio and inability to realize single-stage heating

Pending Publication Date: 2017-01-04
苏州热火机电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy efficiency ratio of the cascade bipolar heat pump in the prior art is too low, and it cannot work in a single-stage heating mode.

Method used

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  • Double-temperature-rising cascading-type heat pump
  • Double-temperature-rising cascading-type heat pump
  • Double-temperature-rising cascading-type heat pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] refer to figure 1 , the gaseous refrigerant from the first compressor 4 releases heat through the first condenser 1 to become a liquid refrigerant, and after being throttled by the first expansion valve 2, it enters the intermediate heat exchanger 3 to absorb heat and becomes a gaseous refrigerant to return to the first compressor4. At the same time, the gaseous refrigerant from the second compressor 8 enters the intermediate heat exchanger 3 to release heat, then enters the second condenser 5 to release heat and becomes liquid refrigerant, and enters the evaporator 7 after throttling by the second expansion valve 6 After absorbing heat, it returns to the second compressor 8 after becoming a gaseous refrigerant. The cold water enters the first condenser 1 to absorb heat after passing through the second condenser 5 to absorb heat and become high-temperature hot water.

[0020] When the first compressor 4 is not working, the second compressor 8 can work alone. At this t...

Embodiment 2

[0023] refer to figure 2 : In order to enhance the performance of single-stage compressor operation, the figure 1 On the basis, a solenoid valve 9 is added to bypass the pipeline. At this time, most of the gaseous refrigerant from the second compressor 8 directly enters the second condenser 5 through the bypass solenoid valve 9 without passing through the intermediate heat exchanger 3 .

Embodiment 3

[0025] refer to image 3 : In order to better solve the defrosting problem of evaporator 7, in figure 1 On the basis of adding four-way reversing valve 10,

[0026] Specifically, the pipeline at the outlet of the second compressor 8 is provided with a four-way reversing valve 10, the first outlet of the four-way reversing valve 10 is connected to the pipeline at the inlet of the intermediate heat exchanger 3, and the third outlet is connected to the evaporator 7 outlet pipelines are connected, and the middle outlet pipeline is connected to the second compressor 8 inlets.

[0027] During normal heating operation, the gaseous refrigerant from the second compressor 8 passes through the four-way reversing valve 10 and then enters the intermediate heat exchanger 3 and the second condenser 5 to release heat to become liquid refrigerant, and then passes through the second expansion valve for 6 knots After flowing into the evaporator 7 to absorb heat, it becomes a gaseous refrigeran...

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PUM

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Abstract

The invention discloses a double-temperature-rising cascading-type heat pump. The double-temperature-rising cascading-type heat pump comprises a first condenser, a first expansion valve, a medium heat exchanger and a first compressor, wherein a first circulation loop is sequentially formed by the first condenser, the first expansion, the medium heat exchanged and the first compressor; the double-temperature-rising cascading-type heat pump also comprises a second compressor, a medium heat exchanger, a second condenser, a second expansion valve and an evaporator, wherein a second circulation loop is formed by the second compressor, the medium heat exchanger, the second condenser, the second expansion valve and the evaporator. The double-temperature-rising cascading-type heat pump has the advantages that due to double-stage heating in the working state that 'cold water is heated into hot water', or 'cold wind is heated into hot wind', the heating capacity of the heat pump is improved, and the energy efficiency ratio of a system is increased. Under the specific working conditions such as the high-environment-temperature working condition, operating of a high-pressure-stage heat pump system is canceled, and working is carried out only in a single-stage heating mode.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a double-temperature-rising cascade heat pump. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Conventional cascade two-stage heat pumps have been applied and promoted to a certain extent in society. However, the cascade bipolar heat pump in the prior art has too low an energy efficiency ratio and cannot work in a single-stage heating mode. [0004] Therefore prior art remains to improve and develop. Contents of the invention [0005] The technical problem to be solved by the present invention is to provide a double-temperature cascade heat pump with high energy efficiency ratio, which can cancel the operation of the high-pressure heat pump system and work in a single-stage heating mode. [0006] The technical solution of the present invention is...

Claims

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Application Information

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IPC IPC(8): F25B7/00F24H4/02F24H4/06
CPCF24H4/02F24H4/06F25B7/00
Inventor 陈志强
Owner 苏州热火机电技术有限公司