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Exhaust temperature control method, controller and air energy heat pump unit

A technology of exhaust temperature and control method, which is applied in the direction of refrigerators, refrigeration components, compressors, etc., can solve the problems of small suction mass flow rate, decreased heating capacity of the unit, and difficulty in satisfying users, and achieve effective control of exhaust temperature, Improvement of energy efficiency ratio and stable and reliable unit operation

Active Publication Date: 2022-02-11
ZHEJIANG ZHONGGUANG ELECTRIC CO LTD
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Problems solved by technology

However, reducing the frequency of the compressor will lead to a decrease in the heating capacity of the unit, making it difficult to meet the needs of users; increasing the opening of the injection enthalpy valve, at this time, due to the low evaporation temperature and the small mass flow rate of the suction air, the range of discharge temperature drop is limited , the unit is still running at high exhaust temperature

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  • Exhaust temperature control method, controller and air energy heat pump unit
  • Exhaust temperature control method, controller and air energy heat pump unit

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] It should be noted that a common air source heat pump unit includes a compressor, an indoor heat exchanger 9, a throttle valve 7 and an outdoor heat exchanger 4 connected sequentially through a refrigerant pipeline. The four-way ...

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Abstract

The present invention relates to the technical field of heat pumps, in particular to a method for controlling exhaust temperature, comprising the following steps: setting a primary exhaust temperature protection value T 1­ , secondary exhaust temperature protection value T 2 and exhaust temperature control exit temperature T 11 , where T 2 >T 1­ >T 11 ;When the air injection enthalpy-enhancing compressor is running, detect the current exhaust temperature Tpq in real time; if the current exhaust temperature Tpq exceeds the first-level exhaust temperature protection value T 1­ And did not exceed the secondary exhaust temperature protection value T 2 , then increase the opening of the enthalpy injection valve until the current exhaust temperature Tpq is lower than the exhaust temperature control exit temperature T 11 ; If the current exhaust temperature Tpq exceeds the secondary exhaust temperature protection value T 2 , then increase the opening of the injection enthalpy valve and decrease the opening of the throttle valve until the current exhaust temperature Tpq is lower than the exhaust temperature control exit temperature T 11 . The exhaust temperature control method of the present invention can control the exhaust temperature within a reasonable range without reducing the heating capacity of the unit.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to an exhaust temperature control method, a controller and an air energy heat pump unit. Background technique [0002] With the introduction and implementation of the coal-to-electricity policy in the north, air-energy low-temperature variable-frequency heat pump units have been promoted and used in the north. At present, the general-purpose air-energy low-temperature variable-frequency heat pump unit is equipped with components such as an air injection enthalpy compressor, an economizer, an enthalpy injection valve, and a throttle valve to ensure the heating demand in winter in severe cold areas. [0003] However, in some areas or periods of time where the outdoor ambient temperature is extremely low, due to the high compression ratio of the unit, the exhaust temperature is very high, which affects the reliability of the system operation. In order to control the exhaust temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F25B41/20F25B49/02
CPCF25B13/00F25B49/022
Inventor 蒋建军袁晓军王磊李浪凌拥军
Owner ZHEJIANG ZHONGGUANG ELECTRIC CO LTD
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