Key specification for this grain heat pump: material Aluminum, PVC, model MD22B. Everything below is reproduced from the factory data sheet. Made by Guangzhou Demai Electronics Technology Co., Ltd. (3 years on the platform, typical reply ≤6h). For a binding price and lead time, send the volume you need and where it ships to.
Key Features of This Grain Heat Pump
- Material: Aluminum, PVC
- Place Of Origin: China
- Application: Villa, School, Hospital, Office Building, Apartment, Hotel
- Feature: Easy Install
- Control Type: Temperature
- Hole Size: 190*115
Technical Specifications
| Application | Villa, School, Hospital, Office Building, Apartment, Hotel |
|---|---|
| Material | Aluminum, PVC |
| Feature | Easy Install |
| Place Of Origin | China |
| Import Or Not | No |
| Customized Processing | Yes |
| Brand | Barley |
| Model | MD22B |
| Control Type | Temperature |
| Control Mode | Intelligent temperature control regulator |
| Measuring Object | Cooling Agent (water, brine) |
| Temperature Range | -30~150 |
| Temperature Measurement Error | 0.3 |
| Hole Size | 190*115 |
| Selling Units | Single item |
| Single Package Size | 30X10X20 cm |
| Single Gross Weight | 8.0 kg |
Product Details




Product Overview
- This controller is suitable for single/double compressor (single-phase/three-phase) systems;
- This controller supports thermal expansion valves and electronic expansion valves;
- This controller adopts a split installation, consisting of a touch screen (manual operator) and a control board, supporting text screens, 4.3 inches, 7 inches, and 10 inches
- The same size true color screen can meet almost all industrial field application needs;
- This controller can be optionally equipped with WiFi or GPRS modules to achieve remote control of mobile phones;
- This controller can be connected to a third-party controller or computer through a universal 485 interface.






Product features
- Refrigeration and heating operation (manufacturer parameters → [manufacturer mode] can be set to single cooling, single heating, and heat pump to determine whether the user interface can switch between refrigeration and heating modes
- Equation);
- The electronic expansion valve is controlled in segments, making wiring convenient;
- Intelligent defrosting: It not only avoids excessive frost formation, but also avoids the problem of performing defrosting when there is no frost;
- Complete antifreeze function to prevent water pipes from freezing at low temperatures;
- Display all Chinese characters to improve communication efficiency;
- Detailed historical fault records to help analyze possible issues with the unit;
- When there is no display screen, the unit can be turned off or on by disconnecting or closing the "remote switch" of the switch input;
- Support customization of partial output points and temperature points to meet the diverse needs of different models;
- Rich parameter setting functions that can match multiple models and facilitate debugging;
- Power failure memory for various parameters;
- The power-off memory switch state can be set, and in the event of an unexpected short power outage, the machine can continue to operate after being powered on again;
- The staggered power consumption function can achieve 3-stage timed power on/off within 24 hours;
- Support system maintenance (limited time shutdown) function.
































Ordering and Pricing
- Minimum order quantity: 2 piece
- Volume pricing:
- 2+ piece: US $285 / piece
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this grain heat pump?
The standard minimum order quantity is 2 piece. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Guangzhou Demai Electronics Technology Co., Ltd., based in China. The company 3 years as a verified Alibaba.com supplier, operates its own manufacturing. Browse the full Guangzhou Demai Electronics Technology Co., Ltd. range on HVACR Nexus.
See more in Heat Pumps on HVACR Nexus.


















