一、Product Overview
The HLM series, including models HLM068T4, HLM072T4, HLM075T4, and HLM081T4, belongs to the category of commercial refrigeration scroll compressors. Specifically developed for medium-to-large scale refrigeration and air conditioning systems, this series offers a gradient of cooling capacities to facilitate precise model selection based on project requirements. It is widely adaptable to various commercial constant-temperature refrigeration and central air conditioning applications. Stable and reliable, it serves as a preferred power core for commercial HVAC&R projects.
二、Model Specifications
| Model | Displacement (cm³/rev) | Nominal HP | Cooling Capacity (W) | Input Power (kW) | COP | EER | Oil Charge (L) | Net Weight (kg) |
| HLM068T4 | 93.1 | 5.7 | 16,880 | 5.00 | 3.37 | 11.5 | 1.57 | 37 |
| HLM072T4 | 98.7 | 6.0 | 17,840 | 5.29 | 3.37 | 11.5 | 1.57 | 37 |
| HLM075T4 | 102.8 | 6.3 | 18,430 | 5.37 | 3.43 | 11.7 | 1.57 | 37 |
| HLM081T4 | 110.9 | 6.8 | 19,890 | 5.80 | 3.43 | 11.7 | 1.57 | 37 |
Note: The above data represents rated values under 50Hz and R22 operating conditions. The entire series features an outer diameter of 184 mm, a discharge port height of 422 mm, a speed of 2900 rpm at 50Hz (3500 rpm at 60Hz), and a maximum high-side working pressure of 31.1 bar.
三、Explain
Feature
This series utilizes a high-precision scroll plate meshing structure, equipped with a built-in motor protection module and oil separator. It supports stable fixed-frequency output. The multi-model cooling capacity gradient design (with capacity gradually increasing from HLM068T4 to HLM081T4) is compatible with conventional commercial refrigerants. The housing adopts a thickened, pressure-resistant integrated casting process, comes with a shock-absorbing mounting base, and features standardized interface designs.
Advantage
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Built-in Multiple Protections: Features overload, overheat, and high/low-pressure protection interlocks. Automatically shuts down under abnormal operating conditions to reduce risks of compressor burnout and shaft seizure, thereby extending the overall service life.
Benefit
For equipment manufacturers and engineering integrators, stable and highly efficient compressors can enhance the market competitiveness of entire refrigeration units and reduce after-sales rates. The unified series structure cuts down on R&D and testing costs. End-users benefit from stable and continuous cooling performance, controllable long-term electricity expenses, and minimized business losses caused by downtime and maintenance.
四、Application Scenarios
✅ Commercial central air conditioning units and air-cooled chiller units
✅ Constant temperature refrigeration systems for supermarkets, hotels, and office buildings
✅ Industrial process cooling and medium-to-large scale fresh-keeping cold storage refrigeration equipment
✅ Commercial heat pump units and constant temperature & humidity air conditioning equipment
五、Frequently Asked Questions (FAQ)
Q1: What are the main differences between HLM068T4, HLM072T4, HLM075T4, and HLM081T4?
A: The core difference lies in the rated cooling capacity. The model numbers correspond to the cooling capacity level—HLM068T4 has the smallest capacity, while HLM081T4 has the largest. The basic structure, installation dimensions, and protection logic are identical, with parts being universally interchangeable, facilitating iterative model selection for the same series of units.
Q2: What refrigerants are compatible with this compressor series?
A: This series is compatible with conventional commercial refrigerants. It is necessary to verify the refrigerant type specified in the unit's design before selection. Direct replacement with non-designated refrigerants is not recommended to avoid damage to compressor components and energy efficiency degradation.
Q3: What commissioning points should be noted after the installation of a new unit?
A: After installation, ensure that the refrigerant oil charge is correct and the piping is adequately evacuated to standard. During initial power-up, conduct slow commissioning and inspect the oil return condition to ensure stable oil return to the compressor, preventing oil starvation and wear on the scroll plates.
Q4: What causes excessive operating noise in the compressor?
A: First, check whether the shock-absorbing pads are properly installed and if the piping is resonating. Next, inspect for issues like poor oil return or liquid slugging. Under normal operating conditions, this series inherently runs with low noise; abnormal noise is mostly attributed to installation or system piping issues.
Q5: Can it directly replace scroll compressors of other brands with the same cooling capacity?
A: Matching cooling capacity is merely a basic prerequisite. It is essential to verify installation base dimensions, pipe connection specifications, electrical parameters, and refrigerant oil types. Replacement is only feasible if all parameters are consistent; blind direct replacement is not recommended.
Procurement & Cooperation
We maintain ready stock of the full HLM series from HLM068T4 to HLM081T4, and can provide specifications, dimension drawings, and tiered bulk pricing. Send your model, quantity, and delivery location to us, and we will provide a product quotation along with stock availability.
Our Commitment: Never let selection errors delay your project, and never let supply delays impact your schedule.
三、Explain
Procurement & Cooperation
