Heat pump hot water system

The heat pump system addresses incomplete defrosting by dynamically adjusting timeout periods based on power consumption limits, ensuring effective defrosting and hot water generation even under power constraints.

JP7894827B2Active Publication Date: 2026-07-24CORONA CORP +1
View PDF 5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
CORONA CORP
Filing Date
2023-03-07
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Conventional heat pump water heaters face inefficiencies in defrosting operations due to power suppression signals limiting compressor rotation speed, leading to incomplete defrosting and residual frost, especially when operating on limited power sources like household AC or storage batteries.

Method used

A heat pump system with a control mechanism that switches between hot water generation and forward cycle defrosting operations, adjusting timeout periods based on power consumption limits, and updating timeout times to ensure sufficient defrosting even under power constraints.

Benefits of technology

Ensures reliable and complete defrosting by extending timeout periods when power consumption is limited, preventing residual frost and maintaining efficient operation despite fluctuating power availability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0007894827000001
    Figure 0007894827000001
  • Figure 0007894827000002
    Figure 0007894827000002
  • Figure 0007894827000003
    Figure 0007894827000003
Patent Text Reader

Abstract

To sufficiently perform defrosting even in a case when power suppression control is executed.SOLUTION: In a heating control device 50, a prescribed time-out time is set by a time-out time setting portion 410G, a normal cycle defrosting operation is forcibly terminated by an operation switching portion 410A and a boiling-up operation is returned in a case when a time-out time elapses after start of the normal cycle defrosting operation. Further the time-out time is variably set according to a power consumption upper limit value allowed by a power suppression signal, by the time-out time setting portion 410G. Thereby, the smaller the power consumption upper limit value is, the longer time-out time can be set, so that remaining of frost can be prevented and defrosting can be sufficiently performed.SELECTED DRAWING: Figure 3
Need to check novelty before this filing date? Find Prior Art