Document Overview
Key Findings The HB2 hair dryer completed a full-discharge thermal run test on 3 samples, with all motor, airflow duct, and battery temperatures remaining well below critical thresholds — results are provided for reference only. Test Type: Reliability Test (温升测试) Report No.: 20250419001.0 Test Date:…
- Document type
- Test Report
- Prepared by
- Alex Newman
- Published
- Last reviewed
- Topics
- Environmental Testing
Key Findings
The HB2 hair dryer completed a full-discharge thermal run test on 3 samples, with all motor, airflow duct, and battery temperatures remaining well below critical thresholds — results are provided for reference only.
- Test Type: Reliability Test (温升测试)
- Report No.: 20250419001.0
- Test Date: 2025-04-19
- Samples: 3 PCS (HB2-1#, HB2-2#, HB2-3#)
- Ambient Temperature: 29.0 °C
- Peak Motor Temperature: 54.4 °C (HB2-3#, temperature rise 25.4 K)
- Peak Battery Temperature: 46.3 °C (HB2-3#, temperature rise 17.3 K)
- Peak Internal Airflow Duct Temperature: 45.5 °C (HB2-3#, temperature rise 16.5 K)
- Verdict: For Reference Only (供参考)
Test Overview
| Field | Detail |
|---|---|
| Test Type | Environmental Testing — Thermal Rise (温升测试报告) |
| Test Standard | Internal Standard (内部标准) |
| Formal Test Standard | / (not specified) |
| Report No. | 20250419001.0 |
| Test Date | 2025-04-19 |
| Test No. | — (not assigned) |
| Product No. / Name | HB2 — Hair Dryer (HB2-吹风机) |
| Product URL | Not available |
| Manufacturer / Brand | ETENWOLF |
| Sample Quantity / No. | 3 PCS |
| Test Environment | Ambient temperature 29.0 °C, standard indoor conditions |
| Test Category | Reliability Test (可靠性测试) |
| Test Purpose | Monitor motor and battery temperatures during product operation until battery is fully discharged |
Test Equipment & Setup
| Parameter | Detail |
|---|---|
| Unit Under Test | HB2 Hair Dryer (HB2-吹风机) |
| Sample Count | 3 PCS (HB2-1#, HB2-2#, HB2-3#) |
| Monitoring Points | Motor temperature, internal airflow duct temperature, battery temperature |
| Temperature Unit | °C (absolute); K (temperature rise delta) |
| Ambient Temperature | 29.0 °C |
| Initial Battery State | Fully charged (满电状态) |
| Test Standard Applied | Internal standard (内部标准); no external norm cited |
| Test Photo Reference | Internal wiring photo + in-operation thermal photo (见测试图片) |
Test Procedure
- Pre-test: Confirm ambient temperature is at standard room conditions (~29 °C). Charge all 3 samples to full battery capacity (满电状态).
- Setup: Install thermal monitoring sensors at the motor, internal airflow duct, and battery locations. Verify internal wiring connections (see internal wiring photo).
- Operation: Power on each sample at room temperature and run continuously until the battery is fully discharged (电量耗尽).
- Monitoring: Record motor temperature, internal airflow duct temperature, and battery temperature at regular intervals throughout the run. Full time-series data is logged in the sibling sheet (温升数据).
- Post-test: Record peak (maximum) temperatures and calculate temperature rise (ΔT in Kelvin) for each monitoring point by subtracting ambient temperature.
- Acceptance Criteria: No formal pass/fail limit specified (internal standard; results issued for reference only).
Test Data & Results
| Sample No. | Parameter | Motor Temp. (°C / K) | Internal Airflow Duct Temp. (°C / K) | Battery Temp. (°C / K) | Ambient Temp. (°C) |
|---|---|---|---|---|---|
| HB2-1# | Peak Temperature (°C) | 45.7 | 39.5 | 40.8 | 29.0 |
| Temperature Rise (K) | 16.7 | 10.5 | 11.8 | ||
| HB2-2# | Peak Temperature (°C) | 49.6 | 40.8 | 40.8 | 29.0 |
| Temperature Rise (K) | 20.6 | 11.8 | 11.8 | ||
| HB2-3# | Peak Temperature (°C) | 54.4 | 45.5 | 46.3 | 29.0 |
| Temperature Rise (K) | 25.4 | 16.5 | 17.3 |
Observations: Sample HB2-3# recorded the highest temperatures across all three monitoring points. Motor temperatures were consistently the highest of the three measurement locations. Temperature rises across all samples and locations were moderate, with no anomalous spikes observed. Full time-series thermal data is recorded in the sibling sheet (温升数据). Results are issued for reference only — no formal acceptance limit was applied.
Conclusion
| Field | Detail |
|---|---|
| Result | For Reference Only (供参考) |
| Standard | Internal Standard (内部标准) |
| Test Conditions | Full battery discharge run at ambient 29.0 °C, room temperature environment |
| Samples Tested | 3 PCS — HB2-1#, HB2-2#, HB2-3# |
| Peak Motor Temp. | 54.4 °C (HB2-3#), rise 25.4 K |
| Peak Airflow Duct Temp. | 45.5 °C (HB2-3#), rise 16.5 K |
| Peak Battery Temp. | 46.3 °C (HB2-3#), rise 17.3 K |
| Verdict | For Reference Only — no formal pass/fail criterion defined |
Document Information
| Role | Name (Pinyin) | Date |
|---|---|---|
| Tested By (测试/日期) | Li Guanghua | 2025-04-19 |
| Checked By (审核/日期) | Zhang Ronggui | 2025-04-19 |
| Approved By (审核/日期) | Mai Shaoqiang | 2025-04-19 |
| Report No. | 20250419001.0 | |
| Source File | HB2吹风机-温升报告-2025.4.19.xls | |
| Sheet | 温升报告 (Sheet 1 of 2) | |
Frequently Asked Questions
What does the temperature rise (K) value represent?
Temperature rise in Kelvin (K) is the difference between the peak recorded temperature at a specific location (motor, airflow duct, or battery) and the ambient temperature at the time of testing. It isolates the heat generated by the product itself from background environmental heat. For HB2-3#, the motor produced a rise of 25.4 K above the 29.0 °C ambient, reaching a peak of 54.4 °C.
Why is the verdict “For Reference Only” rather than Pass or Fail?
The test was conducted against an internal standard with no defined numerical acceptance threshold. The thermal data is captured to establish a baseline and track product behavior over development iterations, not to certify compliance with a specific external norm. A formal pass/fail verdict would require an applicable external standard with defined temperature limits (for example, IEC 60335-2-23 for personal care appliances).
Why did HB2-3# record higher temperatures than HB2-1# and HB2-2#?
Unit-to-unit variation in motor efficiency, airflow resistance, and battery internal resistance can all cause differences in thermal output between nominally identical samples. The spread observed here (motor range 45.7–54.4 °C) is typical for a small-batch reliability check. The full time-series data in the 温升数据 sheet can be reviewed to determine whether HB2-3# ran longer, drew more current, or had a different discharge profile.
Where can I find the detailed time-series thermal data?
The interval-by-interval temperature log is recorded in the companion sheet 温升数据 from the same Excel workbook. That sheet captures the temperature readings sampled throughout the full discharge cycle, allowing engineers to plot thermal profiles and identify the point of peak temperature during operation.
Related Products
Explore other resources for the HB2 Hair Dryer:
- HB2 Product Page — ETENWOLF Inflation Tools
- Sibling Test Sheet (same workbook): 温升数据 — Full thermal time-series data recorded during the HB2 discharge run (Sheet 2 of 2, file: HB2吹风机-温升报告-2025.4.19.xls)