PRODUCTS DETAILS

Home > Products >

24kW Electronic Expansion Valve with Bidirectional Operation and Precise Refrigerant Control for Bus Heat Pump HVAC Systems

Products

Transportation Refrigeration Units

Refrigerated Storage Container

24kW Electronic Expansion Valve with Bidirectional Operation and Precise Refrigerant Control for Bus Heat Pump HVAC Systems

Detail Information

Product Description

Detail Information

Highlight:

24kW Electronic Expansion Valve

Bidirectional Operation EEV

Precise Refrigerant Control Heat Pump Valve

Product Description

Electronic Expansion Valve for 24kW Bus Heat Pump HVAC Systems

Overview

The Electronic Expansion Valve (EEV) is a critical component in modern 24kW bus heat pump air conditioning systems, enabling precise refrigerant flow control to optimize heating and cooling performance. Unlike traditional thermostatic expansion valves (TXVs), EEVs utilize electronic feedback from temperature and pressure sensors to dynamically adjust valve opening, ensuring maximum energy efficiency, rapid cabin temperature response, and stable operation under varying ambient conditions—essential for electric and hybrid city buses.

Designed specifically for heavy-duty mobile HVAC applications, the EEV used in 24kW bus heat pumps supports both heating and cooling modes with high reliability, even in extreme climates ranging from -30°C to +55°C. Its integration with the vehicle's thermal management system allows seamless coordination with compressors, fans, and other actuators for intelligent climate control.

Key Features & Benefits

Precise Refrigerant Control: Modulates refrigerant flow in real time based on superheat or subcooling data, improving COP (Coefficient of Performance) by up to 15-20% compared to fixed-orifice devices.
Bidirectional Operation: Supports reversible heat pump cycles without requiring additional valves—ideal for all-season bus HVAC systems.
Fast Response Time: Reacts within milliseconds to load changes, maintaining consistent cabin comfort during frequent stops and starts typical in urban transit.
Durability & Vibration Resistance: Built with robust materials (e.g., stainless steel valve body, ceramic-coated needle) to withstand road vibrations, thermal cycling, and long service life (>100,000 cycles).
Compatibility: Works with common low-GWP refrigerants such as R134a, R407C, and increasingly R744 (CO₂) in next-gen systems.

Technical Specifications

Parameter	Value / Range
Nominal Cooling Capacity	24 kW (system-level)
Valve Type	Pulse-width modulated stepper motor EEV
Refrigerant Compatibility	R134a, R407C, R410A, R744 (CO₂)*
Operating Voltage	12 VDC or 24 VDC (vehicle-compatible)
Control Signal	PWM or LIN/CAN bus (SAE J1939 optional)
Flow Range (R134a)	0.5 - 8.0 kg/h (adjustable)
Max Operating Pressure	4.5 MPa (high-side)
Ambient Temperature Range	-40°C to +85°C
IP Rating	IP67 (dust-tight & water-resistant)
Response Time	< 200 ms
Life Cycle	≥ 100,000 full open/close cycles

Note: CO₂ compatibility requires specialized high-pressure valve design; confirm model variant.

Applications

This EEV is engineered for:

Electric and hybrid city buses
Intercity coaches with heat pump HVAC
Retrofit projects upgrading from conventional AC to efficient heat pump systems
Cold-climate public transport fleets requiring reliable defrost and heating performance

Industry Context

According to SAE International and recent studies by the International Council on Clean Transportation (ICCT), heat pump adoption in electric buses can reduce winter energy consumption by 30-50% compared to resistive heating. The EEV is central to this efficiency gain, as highlighted in technical white papers from leading automotive thermal suppliers like Denso, Valeo, and Mahle. Modern bus HVAC architectures increasingly rely on EEVs for their ability to maintain optimal superheat across wide operating envelopes—a necessity for battery-electric vehicles where every kWh counts.

For integration support, calibration protocols, or custom configuration for your 24kW bus heat pump platform, contact our engineering team for OEM/ODM solutions compliant with ISO/TS 16949 and E-Mark certification standards.

Tags:

High-Performance PTC Heating Element with Self-Regulating Temperature Control, Energy Efficient Operation, and Rapid Uniform Heating

Contact Now

High-Voltage PT Temperature Sensor with 1,500 VDC Isolation and Pt1000 or Pt100 Element for IP67 or IP6K9K Battery Thermal Management

Contact Now

PRODUCTS DETAILS

Products

Detail Information

Product Description

Detail Information

Highlight

24kW Electronic Expansion Valve

Bidirectional Operation EEV

Precise Refrigerant Control Heat Pump Valve

Product Description

Electronic Expansion Valve for 24kW Bus Heat Pump HVAC Systems

Overview

Key Features & Benefits

Precise Refrigerant Control: Modulates refrigerant flow in real time based on superheat or subcooling data, improving COP (Coefficient of Performance) by up to 15-20% compared to fixed-orifice devices.
Bidirectional Operation: Supports reversible heat pump cycles without requiring additional valves—ideal for all-season bus HVAC systems.
Fast Response Time: Reacts within milliseconds to load changes, maintaining consistent cabin comfort during frequent stops and starts typical in urban transit.
Durability & Vibration Resistance: Built with robust materials (e.g., stainless steel valve body, ceramic-coated needle) to withstand road vibrations, thermal cycling, and long service life (>100,000 cycles).
Compatibility: Works with common low-GWP refrigerants such as R134a, R407C, and increasingly R744 (CO₂) in next-gen systems.

Technical Specifications

Parameter	Value / Range
Nominal Cooling Capacity	24 kW (system-level)
Valve Type	Pulse-width modulated stepper motor EEV
Refrigerant Compatibility	R134a, R407C, R410A, R744 (CO₂)*
Operating Voltage	12 VDC or 24 VDC (vehicle-compatible)
Control Signal	PWM or LIN/CAN bus (SAE J1939 optional)
Flow Range (R134a)	0.5 - 8.0 kg/h (adjustable)
Max Operating Pressure	4.5 MPa (high-side)
Ambient Temperature Range	-40°C to +85°C
IP Rating	IP67 (dust-tight & water-resistant)
Response Time	< 200 ms
Life Cycle	≥ 100,000 full open/close cycles

Note: CO₂ compatibility requires specialized high-pressure valve design; confirm model variant.

Applications

This EEV is engineered for:

Electric and hybrid city buses
Intercity coaches with heat pump HVAC
Retrofit projects upgrading from conventional AC to efficient heat pump systems
Cold-climate public transport fleets requiring reliable defrost and heating performance

Industry Context

Tags:

Electric Bus Air Conditioner

Parking Air Conditioner

Transportation Refrigeration Units

BTMS System

Refrigerated Tricycle

DC DC Converter

HVAC Control Module

Automotive PDU

Bus Air Purifier

Bus Defroster

Vehicle AC Accessories

Refrigerated Storage Container

Mini Refrigerated Van

Autonomous Delivery Vehicle

Automotive Shock Absorbers

24kW Electronic Expansion Valve with Bidirectional Operation and Precise Refrigerant Control for Bus Heat Pump HVAC Systems

24kW Electronic Expansion Valve

Bidirectional Operation EEV

Precise Refrigerant Control Heat Pump Valve

heater blend door actuator,

hvac blend door actuator,

Electric Bus Air Conditioner

Parking Air Conditioner

Transportation Refrigeration Units

BTMS System

Refrigerated Tricycle

DC DC Converter

HVAC Control Module

Automotive PDU

Bus Air Purifier

Bus Defroster

Vehicle AC Accessories

Refrigerated Storage Container

Mini Refrigerated Van

Autonomous Delivery Vehicle

Automotive Shock Absorbers

24kW Electronic Expansion Valve

Bidirectional Operation EEV

Precise Refrigerant Control Heat Pump Valve

heater blend door actuator,

hvac blend door actuator,