Heat pump system
By introducing solenoid valves and expansion valves into the heat pump system, the parallel or series switching of plate heat exchangers can be realized, which solves the problem of low energy efficiency in the existing technology, improves the system's energy efficiency and heat exchange effect, and adapts to complex load conditions of multiple indoor units.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
- Filing Date
- 2026-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
In existing heat pump systems, the connection method of the two plate heat exchangers is fixed, which cannot simultaneously meet the requirements of series heat recovery and parallel low pressure loss, resulting in low energy efficiency.
The design employs solenoid valve control components and expansion valves, allowing the connection between the first and second plate heat exchangers to be switched between parallel and series configurations. Combined with a four-way valve and refrigerant piping design, it enables free switching on the refrigerant side. With the addition of an independent refrigerant throttling channel and water circuit module, it meets the needs of different operating modes.
It enables efficient use of plate heat exchangers under different load conditions, improves energy efficiency, reduces refrigerant and water flow resistance, meets the complex load requirements of multiple indoor units, and improves energy utilization and heat exchange effect.
Smart Images
Figure CN122408149A_ABST