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A control method for an air source heat pump heating unit

An air source heat pump and unit control technology, applied in the field of heat pumps, can solve problems such as the inability to meet heating needs, and achieve the effects of low operating costs and fast frequency increase rate.

Active Publication Date: 2022-03-22
QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a control method for an air source heat pump heating unit to solve the technical problem in the prior art that the frequency of the compressor is unilaterally adjusted according to the outdoor ambient temperature and cannot meet the urgency of the heating demand

Method used

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  • A control method for an air source heat pump heating unit
  • A control method for an air source heat pump heating unit
  • A control method for an air source heat pump heating unit

Examples

Experimental program
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Embodiment 1

[0062] see Figure 1 to Figure 4 The embodiment of the present invention provides an air source heat pump heating unit, including a compressor 1 , a four-way valve 2 , an indoor heat exchanger 3 , a throttling device 4 , an outdoor heat exchanger 5 and a gas-liquid separator 6 . Several indoor heat exchangers 3 can be connected in series or in parallel, including but not limited to figure 1 and figure 2 connection form.

[0063] Taking several indoor heat exchangers 3 connected in series as an example, a shut-off valve is provided on the main pipeline where the indoor heat exchanger 3 is located. There are two shut-off valves, namely the first shut-off valve 71 and the second shut-off valve 72. The valve 71 is located at the entrance of the main line, and the second stop valve 72 is located at the exit of the main line. A solenoid valve is arranged on one side of the cut-off valve. There are three solenoid valves, which are the first solenoid valve 81, the second solenoid ...

Embodiment 2

[0113] For simplicity, only the differences between Embodiment 2 and Embodiment 1 are described. The difference is that the preset temperature is the indoor preset temperature, and the difference Δs between the indoor ambient temperature and the indoor preset temperature is obtained 2 ;Real-time detection of the liquid return temperature, and obtain the difference Δh between the two detection liquid return temperatures before and after 2 ;according to Δs 2 and Δh 2 , to obtain the frequency change parameter of compressor 1.

[0114] Here, both the liquid return temperature and the indoor temperature are used as the unit operation control points, the indoor ambient temperature is used as the main control parameter, and the liquid return temperature is used as the auxiliary control parameter. Temperature fluctuations; at the same time, it can ensure that the unit is heated to a comfortable indoor temperature, highlighting the rapid heating characteristics of the air source he...

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Abstract

The invention discloses a control method of an air source heat pump heating unit, which belongs to the technical field of heat pumps, including: when receiving a start-up command, obtaining the outdoor ambient temperature and the indoor ambient temperature, and obtaining the temperature of the compressor by combining the outdoor ambient temperature and the indoor ambient temperature Frequency increase rate and frequency platform; when a heating instruction is received, the compressor is controlled to increase frequency to the frequency platform according to the frequency increase rate and keep the frequency unchanged for a set time. At the same time, according to the outdoor ambient temperature and the indoor ambient temperature, the heating demand heating capacity and the urgency of the heating demand are judged. When the indoor temperature is low, the heating demand of the user is urgent, and the frequency of the compressor increases quickly and the frequency is high, so that the unit can quickly provide greater heating capacity to meet the purpose of rapid heating; when the indoor temperature is high, the heating demand of the user is not high. Urgently, the compressor has a slow ramp-up rate and a low frequency. On the premise of ensuring comfort, it operates in the most energy-saving state to meet the demand for low operating costs.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to an air source heat pump heating unit control method. Background technique [0002] In recent years, heat pump technology has been widely used in residential heating in winter. The control method of the existing heat pump unit is mostly: the frequency platform of the compressor is obtained through the outdoor ambient temperature, the purpose is to determine the heating demanded heating capacity according to the outdoor ambient temperature, and then match the heating capacity at different frequencies with the required heating capacity, so that Formulate the matching between the outdoor ambient temperature and the frequency platform, and adjust the frequency of the compressor according to the frequency platform until the indoor ambient temperature reaches the set temperature. [0003] It is impossible to determine the urgency of the heating demand by unilaterally judging the hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24D19/10
CPCF24D19/1021
Inventor 杨磊梁杰魏爱国刘晓伟郑晓峰刘玉君李羲龙
Owner QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE