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Variable-concentration directly-heated type heat pump water heater with flash evaporators and working method thereof

A technology of heat pump water heaters and flash evaporators, which is applied in the field of variable concentration direct heat pump water heaters, and can solve problems such as difficulty in large-scale promotion, large pressure ratios, and attenuation of energy efficiency in heating systems

Inactive Publication Date: 2020-11-17
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the serious attenuation of heating capacity and system energy efficiency, excessive pressure ratio, and high exhaust temperature in low-temperature environments, the low-temperature applicability of conventional air-source heat pump water heaters is poor.
As a result, conventional air source heat pump water heaters can be widely used in southern regions with high outdoor ambient temperature in winter, but it is difficult to achieve large-scale promotion in northern regions (severe cold and cold regions) with low outdoor ambient temperature in winter

Method used

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  • Variable-concentration directly-heated type heat pump water heater with flash evaporators and working method thereof
  • Variable-concentration directly-heated type heat pump water heater with flash evaporators and working method thereof
  • Variable-concentration directly-heated type heat pump water heater with flash evaporators and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: as figure 1 As shown, a variable concentration direct heating heat pump water heater with a flash evaporator includes a main circulation loop, an air supply branch and a concentration adjustment branch. The main circulation loop includes a compressor 1, and the exhaust port 1b of the compressor 1 It is connected with the inlet 2a of the condenser 2, and the outlet 2b of the condenser 2 is connected with the inlet 3a of the high-pressure accumulator 3, and the outlet 3b of the high-pressure accumulator 3 is respectively connected with the inlet 4a of the subcooler 4 and the supplementary expansion of the working medium The inlet 12a of the valve 12 is connected, the outlet 4b of the subcooler 4 is connected with the inlet 5a of the first expansion valve 5 and the inlet 11a of the third stop valve 11 respectively, and the outlet 5b of the first expansion valve 5 is connected with the outlet of the flash evaporator 6 The inlet 6a is connected, the exhaust por...

Embodiment 2

[0048]Example 2: A working method of a variable concentration direct heating air source heat pump water heater. The control method adopted by the system can be suction pressure control valve, compressor power consumption control valve, working fluid level control method, superheat control valve Or its combination, in the present invention, it is preferred to use the inspiratory pressure control method to specifically describe the following working modes:

[0049] The working mode of the heat pump water heater is mainly affected by the outdoor air temperature. When the outdoor air temperature is low, the heat pump water heater runs in the low temperature working mode (S1, S2 and S3), and when the outdoor air temperature is high, it runs in the normal working mode (S4, S5 and S6). The application of air injection enthalpy increasing technology can significantly increase the heating capacity and COP of the heat pump water heater under low temperature conditions and broaden its ap...

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Abstract

The invention provides a variable-concentration directly-heated type heat pump water heater with flash evaporators and a working method thereof. The variable-concentration directly-heated type heat pump water heater with the flash evaporators comprises a main circulation loop, an air supplementing branch and a concentration adjusting branch, and the main circulation loop is formed by connecting acompressor, a condenser, a high-pressure liquid storage device, a subcooler, a first expansion valve, the flash evaporator, a first stop valve, a third stop valve, a second expansion valve and an evaporator; the air supplementing branch is provided with the flash evaporator and a second stop valve which are connected in sequence; and the concentration adjusting branch is formed by connecting a working medium supplementing expansion valve, a component separation and working medium storage tank, an air supplementing concentration adjusting valve and a liquid supplementing concentration adjustingvalve. According to the variable-concentration directly-heated type heat pump water heater, based on the principle of advantage complementation, enhanced vapor injection and working medium concentration adjusting technologies are comprehensively applied to the heat pump water heater, the low-temperature performance and annual comprehensive energy efficiency of the heat pump water heater can be remarkably improved, meanwhile, the applicable temperature range of the heat pump water heater is obviously widened, and the heat pump water heater further has the advantages of being simple in rectification structure, high in component separation efficiency, safe, reliable and the like.

Description

technical field [0001] The invention relates to the technical field of heat pump water heaters, in particular to a variable concentration direct heat heat pump water heater with a flash evaporator and a working method thereof. Background technique [0002] my country's building energy consumption is an important part of the total energy consumption of the society, among which the energy consumption of domestic hot water occupies a large share in the energy consumption of civil buildings and industrial buildings. Although my country's per capita domestic hot water energy consumption is significantly lower than that of developed countries and regions such as the United States, Japan, and Western Europe, the per capita domestic hot water energy consumption and domestic hot water demand in China will increase with the continuous improvement of my country's economic level. increase rapidly. However, the energy crisis and environmental problems have become the main factors hinderi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/02F24H9/20F25B1/10F25B41/04F25B41/06F25B43/00F25B49/02
CPCF24H4/02F24H9/2007F25B1/10F25B43/00F25B49/02
Inventor 巨福军范晓伟王方何大四郑慧凡周晓磊任鹏翔宋昊展单一森
Owner ZHONGYUAN ENGINEERING COLLEGE
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