Question 1

Quick Facts: Direct Expansion (DX) Units

Feature
                    Benefit
                    Best For

Energy Savings
                    
                    Up to 30% less energy use
                    Commercial buildings

Space Saving
                    
                    50% less room needed
                    Small buildings

Quick Installation
                    
                    Plug-and-play setup
                    Fast projects

Temperature Control
                    
                    Precise ±1°C control
                    Hospitals, labs

What Are Direct Expansion (DX) Units?

Accepted Answer

Direct Expansion (DX) Units are special air conditioning systems that cool air directly. The unit integrates air filtration, temperature reduction, dehumidification, heating, and humidification functions. Unlike other systems, they don't need water pipes or cooling towers. Instead, these smart machines use refrigerant to cool air right away.

Question 2

How Do Direct Expansion (DX) Units Work?

Accepted Answer

Understanding how these systems work is simple. Every Direct Expansion (DX) Units system has two main parts:

Question 3

Why Choose SongXin

Accepted Answer

SongXin stands out as a Direct Expansion (DX) Units Manufacturer because we offer:

Question 4

Product Categories – SongXin Direct Expansion (DX) Units

⛺
                        Tent Air Conditioners
                    
                    Specially designed for temporary structures and outdoor applications.

Applications:
                        
                        exhibitions, sports events, weddings, military camps, construction sites, disaster relief shelters.

Advantages:
                        
                        fast deployment, portable design, wide climate adaptability.

🏢
                        DX Rooftop Units
                    
                    Large-capacity packaged units installed directly on building rooftops.

Applications:
                        
                        shopping malls, supermarkets, warehouses, logistics centers, large offices.

Advantages:
                        
                        saves indoor space, high air volume output, suitable for centralized air distribution.

🧩
                        DX Split System
                    
                    Consists of separate outdoor condensing units and indoor air-handling units.

Applications:
                        
                        small offices, retail stores, restaurants, villas, telecom base stations.

Advantages:
                        
                        flexible installation, compact footprint, independent zone control.

🌀
                        Ducted DX Units
                    
                    Hidden installation, connected with air ducts for multi-zone cooling/heating.

Applications:
                        
                        hotels, hospitals, classrooms, residential apartments, luxury villas.

Advantages:
                        
                        low-noise operation, invisible design, supports fresh air integration.

Flexible Financing & Worldwide Delivery You Can Trust

Accepted Answer

Want to lower cooling expenses without compromising on performance? SongXin specializes in highquality Direct Expansion (DX) Air Conditioning Units, offering a smooth, worryfree purchasing experience that blends flexible payment options with fast, dependable shipping—delivered wherever your business needs them.

Question 5

Smart Design. Real Benefits.

Compact Integrated Design

Eliminates need for cooling towers and pumps; reduces initial investment and saves space.

Stable & Reliable Performance

Equipped with advanced scroll compressors and branded control components (e.g., ALCO, Sporlan, Danfoss) ensuring consistent operation.

Flexible System Options

Multi-system design available; precise load matching; staged startup for energy efficiency and extended equipment life.

Ultra-Low Noise Operation

Low-noise fans with optimized sound insulation and vibration control, suitable for noise-sensitive environments.

Clean & Hygienic Air Handling

Anti-bacterial sealing materials, stainless steel condensate trays, and smooth panel surfaces ensure hygienic operation.

Advanced Intelligent Control

Supports local, centralized, and remote/cloud control with functions such as timing, fault diagnosis, energy management, and smart defrosting.

Optional Functions

Electric Heating Section
                    For extra heating demand in low ambient conditions.

Humidification Module
                    To maintain humidity stability in cleanroom or comfort spaces.

Energy-Saving Heat Recovery
                    Up to 50–80% heat recovery efficiency.

Factory Tour & Quality Control

Our production facilities are equipped with modern automated assembly lines, CNC machining centers, and precision testing equipment. From raw material inspection to final product delivery, every unit undergoes strict quality checks.

Manufacturing Strength
                    
                    Scroll and screw compressors, hydrophilic aluminum fins, copper tubes, and electrical components are all sourced from world-renowned brands.

In-Process Control
                    
                    Each assembly stage is monitored to ensure accuracy and consistency.

End-of-Line Testing
                    
                    Every DX unit is subjected to performance testing for cooling/heating capacity, air volume, noise level, and refrigerant leakage.

By implementing ISO 9001 quality management systems, we guarantee high product reliability and long service life.

Safety & Compliance Testing

All DX units comply with international standards and certifications to ensure safe and reliable operation.

Electrical Safety
                    In accordance with IEC and CE requirements.

Performance Standards
                    Tested under ISO 5151 and GB/T 7725 for cooling and heating performance.

Environmental Compliance
                    Units support eco-friendly refrigerants (R410A, R407C, R134a), meeting RoHS directives.

Protective Features

Overload protection

High/low voltage safeguards

High/low refrigerant pressure protection

Anti-freeze and over-temperature protection

Every model undergoes continuous run testing and extreme condition simulation (-20°C to 55°C) to validate durability and safety.

/* ==================== 智能设计与优势特性区域样式 - 开始 ==================== */

/* 重置 */
.sxdx-features-section * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 主容器 */
.sxdx-features-section {
    width: 100%;
    background: #ffffff;
}

/* 智能设计真实优势区域 */
.sxdx-smart-design-area {
    padding: 80px 24px;
    background: #ffffff;
}

.sxdx-smart-container {
    max-width: 1200px;
    margin: 0 auto;
}

.sxdx-smart-header {
    text-align: center;
    margin-bottom: 60px;
}

.sxdx-smart-title {
    font-size: 36px;
    font-weight: 800;
    color: #001481;
    letter-spacing: -0.5px;
}

.sxdx-benefits-table {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sxdx-benefit-row {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 32px;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s ease;
}

.sxdx-benefit-row:hover {
    border-color: #3b82f6;
    box-shadow: 0 8px 24px rgba(0, 20, 129, 0.1);
    transform: translateX(8px);
}

.sxdx-benefit-feature {
    display: flex;
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    gap: 16px;
}

.sxdx-feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #001481 0%, #3b82f6 100%);
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    display: flex;
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    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(0, 20, 129, 0.2);
}

.sxdx-feature-icon svg {
    width: 26px;
    height: 26px;
    color: white;
}

.sxdx-feature-text {
    font-size: 18px;
    font-weight: 700;
    color: #001481;
    line-height: 1.3;
}

.sxdx-benefit-desc {
    display: flex;
    align-items: center;
}

.sxdx-benefit-desc p {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
}

/* 可选功能区域 */
.sxdx-optional-area {
    padding: 80px 24px;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
}

.sxdx-optional-container {
    max-width: 1200px;
    margin: 0 auto;
}

.sxdx-optional-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.sxdx-optional-icon-wrapper {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #001481 0%, #3b82f6 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 20, 129, 0.25);
}

.sxdx-optional-icon-svg {
    width: 32px;
    height: 32px;
    color: white;
}

.sxdx-optional-title {
    font-size: 36px;
    font-weight: 800;
    color: #001481;
    letter-spacing: -0.5px;
}

.sxdx-optional-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.sxdx-optional-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.sxdx-optional-card:hover {
    transform: translateY(-8px);
    border-color: #3b82f6;
    box-shadow: 0 12px 32px rgba(0, 20, 129, 0.15);
}

.sxdx-optional-card-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.sxdx-optional-card-icon svg {
    width: 40px;
    height: 40px;
    color: #001481;
}

.sxdx-optional-card-title {
    font-size: 20px;
    font-weight: 700;
    color: #001481;
    margin-bottom: 12px;
    line-height: 1.3;
}

.sxdx-optional-card-text {
    font-size: 15px;
    color: #475569;
    line-height: 1.6;
}

/* 工厂参观与质量控制区域 */
.sxdx-factory-area {
    padding: 80px 24px;
    background: #ffffff;
}

.sxdx-factory-container {
    max-width: 1200px;
    margin: 0 auto;
}

.sxdx-factory-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.sxdx-factory-icon-wrapper {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #001481 0%, #3b82f6 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 20, 129, 0.25);
}

.sxdx-factory-icon-svg {
    width: 32px;
    height: 32px;
    color: white;
}

.sxdx-factory-title {
    font-size: 36px;
    font-weight: 800;
    color: #001481;
    letter-spacing: -0.5px;
}

.sxdx-factory-intro {
    font-size: 17px;
    color: #475569;
    line-height: 1.8;
    text-align: center;
    max-width: 900px;
    margin: 0 auto 60px;
}

.sxdx-factory-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.sxdx-factory-card {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s ease;
}

.sxdx-factory-card:hover {
    transform: translateY(-8px);
    border-color: #3b82f6;
    box-shadow: 0 8px 24px rgba(0, 20, 129, 0.1);
}

.sxdx-factory-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.sxdx-factory-card-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #001481 0%, #3b82f6 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sxdx-factory-card-icon svg {
    width: 22px;
    height: 22px;
    color: white;
}

.sxdx-factory-card-title {
    font-size: 18px;
    font-weight: 700;
    color: #001481;
}

.sxdx-factory-card-text {
    font-size: 15px;
    color: #475569;
    line-height: 1.7;
}

.sxdx-factory-footer {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 16px;
    padding: 28px;
    text-align: center;
}

.sxdx-factory-footer p {
    font-size: 16px;
    font-weight: 600;
    color: #001481;
    line-height: 1.6;
}

/* 安全与合规测试区域 */
.sxdx-safety-area {
    padding: 80px 24px;
    background: linear-gradient(135deg, #001481 0%, #1e3a8a 100%);
}

.sxdx-safety-container {
    max-width: 1200px;
    margin: 0 auto;
}

.sxdx-safety-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.sxdx-safety-icon-wrapper {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.sxdx-safety-icon-svg {
    width: 32px;
    height: 32px;
    color: white;
}

.sxdx-safety-title {
    font-size: 36px;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.sxdx-safety-intro {
    font-size: 17px;
    color: #bfdbfe;
    line-height: 1.8;
    text-align: center;
    max-width: 900px;
    margin: 0 auto 60px;
}

.sxdx-safety-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.sxdx-safety-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 32px;
    transition: all 0.3s ease;
}

.sxdx-safety-card:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.sxdx-safety-card-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.sxdx-safety-card-icon svg {
    width: 30px;
    height: 30px;
    color: white;
}

.sxdx-safety-card-title {
    font-size: 22px;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.sxdx-safety-card-text {
    font-size: 15px;
    color: #bfdbfe;
    line-height: 1.7;
}

.sxdx-safety-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sxdx-safety-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sxdx-safety-item svg {
    width: 20px;
    height: 20px;
    color: #60a5fa;
    flex-shrink: 0;
}

.sxdx-safety-item span {
    font-size: 14px;
    color: #bfdbfe;
    line-height: 1.5;
}

.sxdx-safety-footer {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 28px;
    text-align: center;
}

.sxdx-safety-footer p {
    font-size: 16px;
    font-weight: 600;
    color: white;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sxdx-smart-title,
    .sxdx-optional-title,
    .sxdx-factory-title,
    .sxdx-safety-title {
        font-size: 30px;
    }
    
    .sxdx-benefit-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .sxdx-optional-grid {
        grid-template-columns: 1fr;
    }
    
    .sxdx-factory-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sxdx-smart-design-area,
    .sxdx-optional-area,
    .sxdx-factory-area,
    .sxdx-safety-area {
        padding: 60px 20px;
    }
    
    .sxdx-smart-title,
    .sxdx-optional-title,
    .sxdx-factory-title,
    .sxdx-safety-title {
        font-size: 26px;
    }
    
    .sxdx-benefit-row {
        padding: 24px;
    }
    
    .sxdx-optional-card,
    .sxdx-factory-card,
    .sxdx-safety-card {
        padding: 28px;
    }
    
    .sxdx-safety-grid {
        grid-template-columns: 1fr;
    }
    
    .sxdx-optional-icon-wrapper,
    .sxdx-factory-icon-wrapper,
    .sxdx-safety-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .sxdx-optional-icon-svg,
    .sxdx-factory-icon-svg,
    .sxdx-safety-icon-svg {
        width: 28px;
        height: 28px;
    }
}

@media (max-width: 480px) {
    .sxdx-smart-design-area,
    .sxdx-optional-area,
    .sxdx-factory-area,
    .sxdx-safety-area {
        padding: 50px 16px;
    }
    
    .sxdx-smart-title,
    .sxdx-optional-title,
    .sxdx-factory-title,
    .sxdx-safety-title {
        font-size: 22px;
    }
    
    .sxdx-optional-header,
    .sxdx-factory-header,
    .sxdx-safety-header {
        flex-direction: column;
        gap: 12px;
    }
    
    .sxdx-feature-icon {
        width: 40px;
        height: 40px;
    }
    
    .sxdx-feature-icon svg {
        width: 22px;
        height: 22px;
    }
    
    .sxdx-feature-text {
        font-size: 16px;
    }
    
    .sxdx-benefit-desc p {
        font-size: 14px;
    }
}

/* ==================== 智能设计与优势特性区域样式 - 结束 ==================== */

Our Services

Accepted Answer

We provide a one-stop HVAC solution tailored for global partners:

Question 6

Application Scenarios of Direct Expansion (DX) Units

Accepted Answer

Direct Expansion (DX) air conditioning units are widely used in various environments due to their compact design, high efficiency, flexible installation, and reliable cooling/heating performance. They are particularly suitable for scenarios where fast deployment, limited space, or decentralized cooling is required.

Engineered for Precision Cooling. Built for Demanding Environments.

Direct Expansion (DX) Units Manufacturer: Your Complete Guide to Energy-Efficient Cooling

Quick Facts: Direct Expansion (DX) Units

What Are Direct Expansion (DX) Units?

How Do Direct Expansion (DX) Units Work?

Outdoor unit

Indoor unit

Compression

Condensation

Flow Transfer

Air Cooling

Why Choose SongXin

Experience

Complete product range

Global certifications and compliance

Customer Support

Warranty

Customization

Product Categories – SongXin Direct Expansion (DX) Units

Tent Air Conditioners

DX Rooftop Units

DX Split System

Ducted DX Units

Flexible Financing & Worldwide Delivery You Can Trust

Efficient Global Shipping

Multiple Secure Payment Options

Adaptable Shipping Terms

Worldwide Service Network

Smart Design. Real Benefits.

Optional Functions

Electric Heating Section

Humidification Module

Energy-Saving Heat Recovery

Factory Tour & Quality Control

Manufacturing Strength

In-Process Control

End-of-Line Testing

Safety & Compliance Testing

Electrical Safety

Performance Standards

Environmental Compliance

Protective Features

Our Services

Pre-Sales Consultation

Customization

After-Sales Support

OEM/ODM Cooperation

Logistics & Installation Support

Application Scenarios of Direct Expansion (DX) Units

Commercial Buildings

Industrial & Special Facilities

Hospitality & Public Spaces

Temporary & Mobile Applications

Engineered Structure & Premium Components of SongXin DX Unit

Frame

Panels

Unit Structure & Access Doors

Fan & Motor

Air Dampers

Filters

Heating Options

Humidification

Frequently Asked Questions (FAQ)