a transcritical co 2 Compound heat pump system

A heat pump system, transcritical technology

CN105222385BActive Publication Date: 2018-01-19XI AN JIAOTONG UNIV
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-01-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a transcritical CO 2 A composite heat pump system, including a first evaporator, a regenerator, a first compressor, a first gas cooler, a first expansion valve, a gas-liquid separator, a second compressor, a second gas cooler, and a second expansion valve and the second evaporator; using two sets of independent heat pump systems, using transcritical CO 2 The heat pump system heats the inlet water at 40-50°C to the outlet water temperature at 60-80°C; the invention adjusts the transcritical CO 2 Gas cooler outlet CO in heat pump 2 temperature to ensure that the heat pump system operates at the maximum heating energy efficiency ratio; the present invention introduces the gas-liquid separator and the regenerator into the transcritical CO 2 The heat pump system enables the heat pump cycle system to operate stably under wide operating conditions; in order to solve the problem of transcritical CO 2 The frosting phenomenon during the operation of the heat pump system, through the use of the solenoid valve, can reduce the impact on the compressor while realizing the automatic defrosting of the system.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention relates to the technical field of heat pump systems, and relates to a CO 2 Compound heat pump system.

Background technique

[0002] Mechanical compression heat pump technology uses a small amount of high-grade mechanical energy to complete the cycle of refrigerant in the system by using a compressor, extract heat from a lower temperature heat source and heat other media, that is, by consuming a small amount of high-grade energy, the low Grade energy is upgraded to high grade energy. The air source heat pump uses outdoor air as the heat source to heat or supply hot water. It is easy to install and use, has less environmental pollution, and its energy-saving effect is significantly higher than that of heating methods such as electric heating. However, there are some deficiencies in the operation of air source heat pumps in low temperature environments. For example, as the ambient temperature decreases, the indoor heat load demand incr...

Examples

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] see figure 1 As shown, the present invention is a transcritical CO 2 Compound heat pump system, including first gas cooler 3, first expansion valve 11, first evaporator 4, first compressor 1, gas-liquid separator 5, regenerator 12, second compressor 6, second expansion Valve 13 , second evaporator 7 and second gas cooler 8 .

[0029] The first gas cooler 3, the regenerator 12, the gas-liquid separator 5, the first expansion valve 11, the first evaporator 4, and the first compressor 1 form a first heat pump system; the outlet of the first compressor 1 is connected to the first The refrigerant inlet of a gas cooler 3, the refrigerant outlet of the first gas cooler 3 is connected to the inlet of the first evaporator 4 through the first pipeline of the regenerator 12, and the outlet of the first evaporator 4 passes through the regenerator The second pip...