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Cascade heat pump control method and system

A control method and cascading technology, applied in the field of heat pumps, can solve problems such as heat mismatch between two stages

Pending Publication Date: 2019-09-27
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a cascade heat pump control method and system, which are used to solve the problem of two-stage heat mismatch in existing cascade heat pumps, so as to improve the energy efficiency and operation stability of the heat pump unit, and serve as an industrial field The high-temperature heating requirements of the production process provide more energy-saving and environmentally-friendly technical solutions

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  • Cascade heat pump control method and system
  • Cascade heat pump control method and system
  • Cascade heat pump control method and system

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that unless otherwise specified and limited, the terms "first", "second" and "third" are for the purpose of clearly explaining the numbering of product parts and do not represent any substantive gender distinction. The directions of "up", "down", "left"...

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Abstract

The invention relates to the technical field of heat pumps, and discloses a cascade heat pump control method and system. The cascade heat pump control method comprises a heating mode, the heating mode comprises the steps that the precision preset value of the target parameter is obtained, the ideal temperature value T_set of the used side fluid is set, taking the current detected ambient temperature value as a recording ambient temperature value Tr_air; calculating a set parameter value of the target parameter according to the ideal temperature value T_set and the recorded ambient temperature value Tr_air; detecting a real-time parameter value of the working medium in the evaporative condenser, and calculating a parameter difference value between the real-time parameter value and the set parameter value; and adjusting the high-temperature stage compressor and or the operation frequency of the low-temperature stage compressor until the parameter difference value is smaller than or equal to the precision preset value. By means of the cascade heat pump control method and system, the use side fluid temperature can reach 80 DEG c to 140 DEG c, and a more energy-saving and environment-friendly technical solution is provided for the high-temperature heating requirements in the industrial field.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a cascade heat pump control method and system. Background technique [0002] As the global energy situation and environmental pollution become more and more severe, energy conservation and emission reduction has become the focus of attention all over the world, and energy-saving technology has become the goal of active research and development by various countries. Heat pumps have become a research hotspot in the field of energy applications because of their high heating efficiency, energy saving, and environmental protection. Most of the heat pumps currently used are vapor compression single-stage cycle heat pumps, which can maintain high efficiency at low ambient temperatures after adopting the technology of supplementing air to increase enthalpy. However, the heating temperature of ordinary single-stage heat pumps generally does not exceed 70°C. In industrial production, ...

Claims

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Application Information

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IPC IPC(8): F25B49/02F25B7/00F25B30/02
CPCF25B49/02F25B7/00F25B30/02
Inventor 唐明生田长青王锦郭长民马永德
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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