Refrigerator performance and energy efficiency testing system

The refrigerator performance and energy efficiency testing system is used for type testing and operating condition testing of refrigerators, providing stable and reliable environmental conditions. It can simultaneously accommodate 6 refrigerators (or 4 freezers) with a capacity of less than 500 liters for performance testing and other electrical product testing. Simultaneously equipped with explosion-proof devices using HC refrigerant. Its main technical conditions comply with the requirements of sections 6.1.1-6.1.4 of GB8059.1-3-1995 and sections 5.1-5.1.2 of GB8059.4-93, as well as the requirements of the new version of GB/T8059.

1 Applicable regulations, specifications and standards

The requirements for laboratories in GB8059.1-4-1995 and GB8059 new standards.

2. Technical agreement signed by both parties.

3. Both companies shall negotiate and handle matters without applicable specifications, construction standards, or special instructions.

4. The illuminance meets the requirements of GB/T21001.2-2007 standard

2、 Test project

(1) Storage temperature (2) Cooling rate

(3) Power consumption (4) Freezing capacity, cooling capacity

(5) Load temperature rise rate (6) Voltage, current, power, power factor

(7) Condensation test (8) Performance test of air-cooled refrigerator

3、 Laboratory environmental conditions

(1) Temperature and humidity control range and accuracy: Dry bulb temperature: 0-50 ℃± 0.3 ℃

Relative humidity: 45-95% RH ± 3% RH (above 16 ℃)

(2) Temperature distribution: in accordance with GB standards

(3) Temperature fluctuation range: The specified ambient temperature should be maintained at each measuring point, with a fluctuation range within ± 0.5 ℃.

(4) Temperature gradient: Within the range of 2300mm above the ground, the vertical temperature gradient is ≤ 0.90K/m within the range of 10-45 ℃, and ≤ 1.5K/m for the rest (divided into three layers, with distances of 300mm from the ground for the lower layer, 1000mm from the ground for the middle layer, and 650mm from the ceiling for the upper layer).

(5) Wind speed: The wind speed in any direction at all specified measuring points is ≤ 0.20 m/s.

(6) Heating and cooling speed: The time from 10 ℃ to 50 ℃ is less than 120 minutes; The time from 50 ℃ to 10 ℃ is less than 150 minutes.

4、 Applicable power supply

Single phase 70-250V50/60HZ

5、 Measurement system accuracy

The measurement method shall be carried out in accordance with the requirements of the national standard and GB8059.1-4

(1) Temperature

Range: -40 ℃ to+50 ℃

Accuracy: -40 ℃~+50 ℃: ± 0.3 ℃, other ranges ± 1 ℃

(2) Power consumption

Accuracy: ± 1.0%; Resolution 0.001kWh

(3) Current

Range: 0-10A Accuracy: ≤± 0.5% Full Scale Meter

(4) Voltage

Range: 0-300V Accuracy: ≤± 0.5% Full Scale Meter

(5) Power

Range: 0-2KW Accuracy: ≤± 0.5% Full Scale Meter

Chapter 2: Use of Equipment

1、 Laboratory

(1) Prefabricated structural panel assembly type, with full area perforated panel air supply at the top and air return at the bottom of the air conditioning cabinet.

(2) External dimensions D6500 × W4200 × H3300

Internal dimensions D6300 × W4000 × H3100

Orifice plate to ground H2800

(3) Insulation 100mm rigid polyurethane foam insulation

(4) The walls and ceilings are made of 0.6mm colored steel plates both inside and outside

0.6mm aluminum alloy perforated plate ceiling

(5) Floor 2.5mm single-sided stainless steel 100mm rigid polyurethane foam insulation board combination

(6) Double door D (400+1200) × H2100 1

300mm x 350mm observation window (two-layer glass), anti condensation

(7) Lighting double tube explosion-proof fluorescent lamp 40W~10 pieces (220V), dual control

(8) Alarm for explosive gas leakage, automatic power-off and start of exhaust fan for ventilation

Explosion proof function, alarm function for over temperature, high and low pressure, water shortage, etc

(9) Prototype testing wooden platform: made of wooden board, odorless black, sturdy, and can flexibly adjust the width of the surrounding board. The platform is easy to move

2. Adjust the unit again

(1) 1 set of stainless steel structure for air conditioner

Supply fan with multiple blades and dual inlet air

Cooler copper tube with hydrophilic film aluminum evaporator

Heater 22.5KW

(2) 2 air-cooled compression condensing units (imported fully enclosed head)

Model 5HP * 1+6HP * 1

To ensure that the refrigeration unit can operate normally in both summer and winter, ensure that the condenser area is large enough and the fan is automatically adjustable in speed

(3) 1 humidifier

Model: Shallow groove type

Specification 22.5KW

(4) 1 Mitsubishi frequency converter

Type FR-E740

3. General purpose machines

(1) 1 power and measuring cabinet

Type: Steel plate independent type

(2) 6 power boxes for the tested machine

Type: Stainless steel plate hanging wall type

Each workstation has 2 power supply options; In addition, the power socket of the testing station should have a European grounding method for easy testing.

(3) 6 thermocouple boxes

Type: Stainless steel plate hanging wall type

20ＣＨ

4) Explosion proof system

a. 2 sensors

Specifications

R600a sensor

b. 1 fan

Specification: Domestic explosion-proof fan

1000ｍ3／ｈ

c. 2 air doors

Specification: Φ 300 automatic switch

d. Two pneumatic valves for air door control

Specifications

e. 1 air compressor (0.5HP)

Chapter 3 Temperature and Humidity Control

1. Temperature and humidity measuring device (Qianno, Japan) 1 set

Model R221-30

Automatic water replenishment method

2. Four temperature and humidity regulators

Model SR93

Specification input platinum resistor

Accuracy ± 0.3% FS

Output 4-20mADC

3. 6 SCR power regulators

Model SAM40100D

Specification 100A

Chapter 4: Data Processing Devices

1. Data collector (Yokogawa) 1 set

Type DA100

Specification: 120 point data acquisition system

2. Six digital power meters (Yokogawa)

Model WT210

3. Microcontrollers and related devices

(1) 2 sets of computers

Specification P4 2G memory, 320GB hard drive, 17 inch LCD

Power supply AC220V 50Hz

(2) 1 printer (HP)

A4 size inkjet color printer

Power supply AC220V 50Hz

(3) Test machine frequency conversion power supply 1 (Epps) 1 unit

Model AFC-31020 (accuracy within 1%)

Specification: Variable frequency power supply 20KVA

(4) Tested machine frequency conversion power supply 2 (Epps) 1 unit

Model AFC-31010 (accuracy within 1%)

Specification: Variable frequency power supply 10KVA