Variable-flow multi-cycle heat pump system

A heat pump system, multi-circulation technology, applied in the direction of fluid circulation arrangement, compressors with reversible circulation, lighting and heating equipment, etc.

Pending Publication Date: 2018-07-10
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the corresponding refrigeration cycle method is generally adopted according to the main needs, which cannot be changed according to the change of working conditions, and the operating cost is h...

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  • Variable-flow multi-cycle heat pump system

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with specific embodiments.

[0029] The schematic diagram of the valve variable flow multi-cycle heat pump system is as follows: Figure 1-Figure 2As shown, it includes refrigeration compressor unit 1, three-way valve 2, heat exchanger 3, indoor unit 5, outdoor unit 6, first throttle valve 4-1, second throttle valve 4-2, first valve 7- 1. The second valve 7-2, the third valve 7-3 and the fourth valve 7-4. The refrigeration compressor unit 1 includes a plurality of compressors 8 and four-way reversing valves 10 having the same number as the compressors, each of the compressors 8 and the corresponding four-way reversing valves 10 form a compressor unit. In each of the compression units, the discharge end of the compressor 8 is connected to the first port of the corresponding four-way reversing valve 10, and the suction end of the compressor 8 is connected to the four-way reversing valve. The third i...

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Abstract

The invention discloses a variable-flow multi-cycle heat pump system, and aims at providing a system which is simple in structure and low in cost. The variable-flow multi-cycle heat pump system comprises a refrigerating compressor unit, a three-way valve, a heat exchanger, an indoor unit, an outdoor unit, a first throttle valve and a second throttle valve; the refrigerating compressor unit comprises multiple compressors and four-way reversing valves of which the number is the same as that of the compressors, and each compressor and the corresponding four-way reversing valve form a compressingunit; in each compressing unit, the exhaust end of the compressor is connected with a first port of the corresponding four-way reversing valve, and the suction end of the compressor is connected witha third port of the corresponding four-way reversing valve; and in each compressing unit, second ports of the four-way reversing valves are connected in parallel and then divided into second ports andthird ports of the refrigerating compressor unit, and fourth ports of the four-way reversing valves are connected in parallel and then divided into first ports and fourth ports of the refrigerating compressor unit. The system is simple in structure and flexible and convenient to switch.

Description

technical field [0001] The invention relates to the technical field of heat pumps, and more specifically relates to a heat pump system capable of realizing single-stage parallel connection of variable flow, double-stage compression and cascade cycle. Background technique [0002] With the increasing pressure of environmental protection, the country vigorously promotes coal-to-electricity products. Air source heat pumps are widely used due to their energy saving and environmental protection features. [0003] For heating in winter, a single-stage compression heat pump cycle is usually used. The single-stage compression heat pump cycle system is simple and low in cost. However, when the difference between the condensing temperature and the evaporating temperature is large, the pressure difference between the condensing pressure and the evaporating pressure is also large, and one-time throttling can no longer satisfy the working conditions with a large pressure difference. For...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B41/06F25B41/04F25B41/20F25B41/31
CPCF25B13/00F25B41/20F25B41/30
Inventor 杨永安李瑞申谷沅橙冯帆杨志仙谭海燕魏滟垒
Owner TIANJIN UNIV OF COMMERCE
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