Air-Source Heat Pump Refrigerant Patent Landscape
Air-Source Heat Pump Refrigerant Patent Landscape in 2026
The evidence corpus for air-source heat pump refrigerant is extremely small, comprising a single patent family, with activity concentrated entirely in China and no discernible competitive field at this query scope. This narrow result suggests the search definition is highly specific; a broader query is needed before drawing strategic conclusions.
A single-family corpus dominated by individual and small-firm filers in China
At the current query scope, the corpus resolves to one patent family. Zhang Mingliang (individual) and Hangzhou Jialisi Weimu New Energy Tech Co Ltd each hold one patent record, jointly accounting for the entire ranked pool.
With two applicants sharing the entirety of the top-hundred-filer pool equally, concentration is absolute at this scope. There is no tier gap to describe because no second tier exists.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Zhang Mingliang | 1 | |
| 2 | HANGZHOU JIALISI WEIMU NEW ENERGY TECH CO LTD | 1 |
The leaders’ positions reflect early-stage or niche activity rather than sustained R&D investment; neither entity shows a meaningful portfolio depth from which technology leadership can be inferred.
Results covering only the most recent part of the observed window are subject to publication lag of roughly 18–24 months, meaning any activity after 2023 is likely under-counted. The corpus size also suggests the query may benefit from broadening to capture the wider refrigerant and heat-pump literature.
A single 2017 filing with no subsequent activity at this query scope
The annual trend and technology composition both reflect the minimal scale of the current corpus. The single filing maps to two IPC branches, covering both heat-pump mechanics and specialty materials.
Annual filing trend
All recorded activity falls in 2017, with zero filings in each subsequent year through 2026. Given publication lag of 18–24 months, the absence of recent records does not confirm inactivity, but at this corpus size no trend inference is reliable.
↗ Hover for values · click a bar to ask EurekaTechnology composition
The corpus splits evenly between C09K (materials for miscellaneous applications, covering refrigerant formulations) and F25B (refrigeration and heat pumps, covering system-level claims). Both branches are represented by a single patent record each, so no dominant technical direction can be established.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
一种高能效超低温空气源CO<sub>2</sub>热泵
本发明公开了一种高能效超低温空气源CO<sub>2</sub>热泵，现有常规热泵热水器产品在极寒环境温度下不能制取热水，本发明通过双级压缩机、辅助交换器、节流阀件、特制气液分离器相连组成的冷媒循环制热系统，提高了CO<sub>2</sub>空气源热泵的制热量及能效，降低了整个CO<sub>2</sub>空气源热泵系统的冷却侧的温度、压力，从而降低了系统功耗，提高系统稳定性。本发明关键还在于辅助交换器和气液分离器的使用，一方面对主循环回路冷媒进行节流前过冷，增大焓差，另一方面通过辅助回路内高温冷媒对气液分离器内液态冷媒适当预热和闪蒸增加吸气量，从而确保CO<sub>2</sub>空气源热泵机组在极寒环境下高效可靠稳定运行。 (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种高能效超低温空气源CO<sub>2</sub>热泵 | 8 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the structure implies for R&D investment decisions
The corpus is too small to support high-confidence strategic conclusions, but the available evidence points to an effectively open field at this query definition, with material and system-level claims both sparsely occupied.
Life-cycle stage: evidence pending
The lifecycle stage cannot be determined from a single-family corpus. The sole filing dates to 2017 with no follow-on activity visible at this scope, which could indicate an isolated early filing rather than a developing field. Broadening the query to cover related refrigerant chemistries and heat-pump system variants is necessary before a maturity assessment is meaningful.
Evidence pendingAbsolute concentration in a two-applicant corpus
Zhang Mingliang and Hangzhou Jialisi Weimu New Energy Tech Co Ltd together account for the entire top-five share of the hundred largest filers in this query. This is a function of corpus size rather than genuine market dominance. Any entrant publishing in this space would immediately rank among the top filers.
Open fieldNo co-applicant activity detected
No collaboration links are present in the evidence. The two applicants appear to have filed independently. The absence of co-filings may reflect the early-stage and individual-inventor character of the corpus rather than a structural preference against collaboration in the broader technology area.
Evidence pendingChina is the sole jurisdiction on record
Both patent records in the corpus were filed in China, and no other national or regional office appears. This means international protection has not been sought at this query scope, leaving all other jurisdictions — including the US, Europe, Japan, and Korea — unaddressed by the identified filings. For an entrant targeting global markets, this represents a wide open geographic field.
China onlyGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
Co-filing pairs, ranked by the number of jointly-filed patent families.
Two applicants share the entirety of the current corpus
At this query scope, the ranked field comprises exactly two applicants, each holding one patent record. Momentum data is not available for either entity.
Zhang Mingliang
Zhang Mingliang holds one patent record focused on the C09K 5 branch, covering refrigerant material formulations. No filing momentum data is available, and the single record dates to 2017, indicating an early or one-time filing rather than an active portfolio strategy.
patent records: 1Hangzhou Jialisi Weimu New Energy Tech Co Ltd
Hangzhou Jialisi Weimu New Energy Tech Co Ltd holds one patent record with a focus spanning F25B subclasses covering refrigeration system components and ultra-low-temperature heat-pump configurations. No momentum data is available from the evidence.
patent records: 1Under-served adjacent branches worth monitoring
No white-space candidates were returned by the evidence for this query scope. The observations below are drawn from the sparse IPC coverage visible in the corpus and should be treated as directional observations rather than validated opportunities.
F25B sub-branches beyond F25B 43 / 47 / 9
The corpus touches three F25B subclasses related to refrigeration accessories, special refrigeration machines, and compression systems, but leaves the broader F25B class largely uncharted at this query scope. Sub-branches covering heat-pump defrost control, variable-capacity compression, and two-phase flow management are absent from the current filing record, representing adjacent territory with direct relevance to air-source heat pump performance. Entry would require system-level claim drafting complementing any refrigerant formulation work.
Search this in Eureka →C09K 5 refrigerant blends for low-GWP compliance
The single C09K 5 record in the corpus covers refrigerant material compositions, yet the broader shift toward low-global-warming-potential refrigerant blends (e.g., HFO-based or natural refrigerant mixtures) is absent from the current evidence. This sub-branch has plausible technical value given regulatory pressure on high-GWP refrigerants globally, and a realistic entry path exists through formulation patents targeting specific air-source heat pump operating envelopes. The sparse prior art at this scope suggests limited blocking risk from existing filers.
Search this in Eureka →How the two filers differ by technology route
Strength of each leader across the main technology routes.
| Player | C09K 5 · Materials for misc. applications | F25B 43 · Refrigeration & heat pumps | F25B 47 · Refrigeration & heat pumps | F25B 9 · Refrigeration & heat pumps |
|---|---|---|---|---|
| Hangzhou Siweim New Energy Technology Development Co Ltd | Absent | Strong · 1 | Strong · 1 | Strong · 1 |
| Zhang Mingliang | Strong · 1 | Absent | Absent | Absent |
Frequently asked questions
The evidence corpus contains one patent family. This very small result suggests the query definition is highly specific, and a broader search across related refrigerant and heat-pump terminology would likely return a larger and more representative corpus.
At this query scope, Zhang Mingliang and Hangzhou Jialisi Weimu New Energy Tech Co Ltd each hold one patent record, making them the only ranked filers. Neither has demonstrated sustained portfolio activity from the available evidence.
Both patent records in the corpus are filed in China. No other national or regional office appears in the evidence, leaving all other major jurisdictions unaddressed by the identified filings.
The corpus spans two IPC classes: C09K (materials for miscellaneous applications, covering refrigerant formulations) and F25B (refrigeration and heat pumps, covering system-level claims). Each class is represented by one patent record.
The single filing on record dates to 2017. No subsequent filings appear in the annual trend through 2026. Given publication lag of roughly 18–24 months, recent activity may be under-counted, but the corpus size makes trend analysis unreliable at this scope.
The evidence returned no validated white-space candidates. However, the sparse IPC coverage points to under-served adjacent branches in F25B subclasses related to defrost control and variable-capacity compression, and in C09K 5 sub-branches covering low-GWP refrigerant blends. These are observational, not confirmed opportunities.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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