A control method based on a heat pump system and a heat pump system

By limiting the number of load shedding cycles and the start-up hysteresis value, the start-up and shutdown of the second compressor in the heat pump system are controlled, which solves the problem of frequent start-up and shutdown caused by the mismatch between the outlet water temperature and the target temperature, reduces energy consumption, and extends the compressor life.

CN115875882BActive Publication Date: 2026-06-12QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE +3
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE
Filing Date
2022-09-30
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

When the outlet water temperature differs from the target temperature, the compressor in the existing heat pump system frequently starts and stops, leading to increased energy consumption and damage to the compressor.

⚗Method used

By limiting the number of load reductions and the start-up hysteresis value, the start-up and stop of the second compressor are controlled, reducing the frequency of frequent start-ups and stop-ups. Combined with the electronic expansion valve, the amount of supplementary gas is adjusted to regulate the outlet water temperature.

🎯Benefits of technology

It reduces the energy consumption of the heat pump system, extends the service life of the compressor, and improves the operational stability of the system.

✦ Generated by Eureka AI based on patent content.

Smart Images

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

Abstract

This application belongs to the field of heat pump technology, and relates to a control method and a heat pump system based on a heat pump system. This application solves the technical problem in the prior art where the compressor, which stops operating when the outlet water temperature differs from the target temperature, is started again, leading to frequent compressor start-stop cycles. The heat pump system includes a first compressor and a second compressor. The method includes: when the first compressor is running and the second compressor has been stopped for a preset duration, obtaining the number of load shedding cycles corresponding to the second compressor; determining whether the number of load shedding cycles is greater than a first preset threshold and less than a second preset threshold; wherein the first preset threshold is less than the second preset threshold; when it is determined that the number of load shedding cycles is greater than the first preset threshold and less than the second preset threshold, detecting the outlet water temperature; and when it is determined that the absolute value of the difference between the outlet water temperature and the target temperature is greater than the start-up hysteresis value, controlling the second compressor to run.
Need to check novelty before this filing date? Find Prior Art