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A heat pump unit using a secondary heat exchanger

A technology of two-stage heat exchanger and heat pump unit, which is applied in the field of heat pump, can solve the problems that heat conduction and heat conduction are easy to interact with each other, and reduce the heat exchange efficiency of heat pump units, so as to achieve good heat exchange effect, reduce pressure and compressor load, and improve the overall The effect of energy efficiency

Active Publication Date: 2018-05-25
FOSHAN GUANGTENG NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing heat pump units have the following disadvantages: (1) the heat exchange pipes and heat exchange pipes of the existing air jet enthalpy-increasing heat exchanger are all arranged in its main refrigerant channel, and are connected with the main refrigerant channel at the same time. The refrigerant heat exchange, the heat transfer between the water exchange pipe and the refrigerant and the heat transfer between the enthalpy heat exchange pipe and the refrigerant are easy to interact, thus reducing the heat exchange efficiency of the heat pump unit

Method used

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  • A heat pump unit using a secondary heat exchanger
  • A heat pump unit using a secondary heat exchanger
  • A heat pump unit using a secondary heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example one, as Figure 1 to Figure 5 As shown, a heat pump unit includes a water storage tank 15 and a refrigerant circulation loop formed by connecting a compressor 1, a four-way valve 2, a secondary heat exchanger 3, a first throttling device 6, and a second heat exchanger 7 through pipes , the secondary heat exchanger 3 includes a shell 31, and the shell 31 is divided into a primary heat exchange cavity 38 and a secondary heat exchange cavity 39 by a partition plate 4, and the primary heat exchange cavity 38 and the secondary heat exchange cavity 39. The heat exchange cavity 39 is provided with a primary heat exchange tube 34 and a secondary heat exchange tube 35 respectively, and a communication channel 41 is provided on the partition plate 4, and the communication channel 41 communicates with the primary heat exchange cavity 38 and the secondary heat exchange. Cavity 39.

[0036] The shell 31 is provided with a first refrigerant inlet 381 and a first refrigerant ...

Embodiment 2

[0066] Example two, as Image 6 As shown, the second embodiment is similar to the embodiment of the first embodiment, and the working principle is also the same. The only difference is that the first refrigerant outlet 382 of the secondary heat exchanger 3 passes through the first throttling device 6 and the second One end of the heat exchanger 7 is connected, and the other end of the second heat exchanger 7 is connected to the C interface of the four-way valve 2. The first refrigerant outlet 382 of the secondary heat exchanger 3 is connected to the secondary exchange through the first throttling device 61. The second refrigerant inlet 352 of the heat exchanger 3 is connected, the second refrigerant outlet 351 of the secondary heat exchanger 3 is connected to the C port of the four-way valve 2 , and the S port of the four-way valve 2 is connected to the air return port 11 of the compressor 1 .

[0067] It can be seen from the above that after the liquid refrigerant comes out o...

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Abstract

The invention relates to a heat pump unit using a two-stage heat exchanger. According to the two-stage heat exchanger of the heat pump unit, the interior of a shell is divided into a first-stage heat exchange cavity and a second-stage heat exchange cavity through a partition plate, a first-stage heat exchange pipe is arranged in the first-stage heat exchange cavity, and a second-stage heat exchange pipe is arranged in the second-stage heat exchange cavity. When the supercooling degree of the first-stage heat exchange pipe is small, the second-stage heat exchange pipe can be put into use together; firstly, superheated refrigerant steam in the first-stage heat exchange cavity rapidly exchanges heat with cooling water in the first-stage heat exchange pipe and then is condensed into liquid refrigerant; then, the liquid refrigerant enters the second-stage heat exchange cavity, the liquid refrigerant in the second-stage heat exchange pipe is evaporated or saturated refrigerant steam absorbs heat of the liquid refrigerant in the second-stage heat exchange cavity, and therefore the refrigerant in the second-stage heat exchanger can be sufficiently supercooled before throttling; and because of the thermal insulation effect of the partition plate, when heat exchange is conducted in the first-stage heat exchange cavity and the second-stage heat exchange cavity, heat conduction in the first-stage heat exchange cavity and heat conduction in the second-stage heat exchange cavity are not likely to influence each other, and therefore the heat exchange efficiency of the heat pump unit can be higher.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a heat pump unit using a secondary heat exchanger. Background technique [0002] At present, the heat exchangers of the general heat pump units are designed with a single-stage heat exchange method. When the temperature of the coolant increases, the subcooling degree of the system decreases, which will lead to excessive pressure of the working fluid in the system and aggravation of the compressor load. , the power of the unit increases, and the energy efficiency ratio decreases. [0003] For example, in the current circulating heat pump water heater, when the water temperature rises, as the water temperature rises, the temperature of the working fluid at the outlet of the condenser gradually increases, and the degree of subcooling decreases, which affects the evaporation and heat absorption of the working fluid in the evaporator. , the heating capacity of the unit decreases b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H4/02
CPCF24H4/02
Inventor 冯永坚罗志锋张嘉庆
Owner FOSHAN GUANGTENG NEW ENERGY CO LTD
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