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CPC Subgroup Additional Only
F25B 2313/021

Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit

Full Title

Compression machines, plants or systems with reversible cycle not otherwise provided for > Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit

Filing statistics

CPC F25B 2313/021 belongs to the parent subclass F25B, which recorded 121,123 patent applications worldwide between 2013 and 2023. Annual filings grew from 7,227 in 2013 to 10,966 in 2023 (+52%), peaking at 13,018 applications in 2018. The most active applicants in class F25 are LG ELECTRONICS (9,415 applications), HAIER SMART HOME (8,015 applications) and MITSUBISHI ELECTRIC CORPORATION (5,758 applications).

Source: EPO PATSTAT, worldwide filings

5 direct subcodes

Child Classifications

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  • F25B 2313/0211 the auxiliary heat exchanger being only used during defrosting
  • F25B 2313/0212 the auxiliary heat exchanger being only used during dehumidifying
  • F25B 2313/0213 the auxiliary heat exchanger being only used during heating
  • F25B 2313/0214 the auxiliary heat exchanger being used parallel to the indoor unit during heating operation
  • F25B 2313/0215 the auxiliary heat exchanger being used parallel to the outdoor heat exchanger during heating operation

Top Applicants

Top 10 applicants by patent filingsfor class F25, 2013–2023, worldwide · Source: EPO PATSTAT

  1. LG ELECTRONICS KR 9,415
  2. HAIER SMART HOME 8,015
  3. MITSUBISHI ELECTRIC CORPORATION JP 5,758
  4. BSH (BOSCH UND SIEMENS HAUSGERAETE) DE 3,827
  5. MIDEA 3,769
  6. GREE ELECTRIC APPLIANCES 3,417
  7. HAIER SMART HOME CN 3,403
  8. SAMSUNG ELECTRONICS COMPANY KR 3,329
  9. DAIKIN INDUSTRIES JP 2,908
  10. HEFEI MIDEA REFRIGERATOR COMPANY 2,186