Geely Emgrand X7. Manual part — 420

8.2.1.2 Refrigeration system parameters

Items Item

parameter

Nominal refrigerating capacity/W

≥4500(rotational speed of compressor is
1800rpm)

Displacement/(ml/r) 180

Model HS18

Compressor

Electromagnetic clutch consumption
power/W

46

Max.air volume/(m3/h)

500

Air Volume Control

Automatic

Blower

Motor consumption power/W

250

Size /mm

68×422×731

heat exchange amount/W

≥15000

Condenser

Air-side resistance/Pa

≤110

Refrigerating capacity/W

≥5500

Evaporator

H-type expansion valve (ton of
refrigeration)

1.5

Temperature regulating method

Control cold-warm air mixture ratio

Lubricating oil/ml

FD46XG:150±10 ml

Driving belt (JL4G18-E)

Poly V-belt (6PK1875)

Driving belt (JLD-4G20//JLD-4G24)

Poly V-belt (

7PK1956

)

8.2.1.3 System Capacity

Specification

Applications

(Metric) English

system

Refrigerant lubricating oil (100PG)

Refrigerant flow away suddenly

40 ml*

1.34 oz*

Replacement of compressor

Note: if the lubricating oil discharged in the course of recyclinging the refrigerant is not replaced, the compressor
may be damaged.

The compressor on the vehicle is pre-filled with 150 ml** (5 oz** ) of refrigerant lubricant (100PG).

Replacement of Condenser

40 ml

**

1.34

oz

**

Replacement of evaporator

60 ml

**

2.0

oz

**

Replacement of Stored Fluid Dryer Core

20 ml#

0.67 oz#

# The oil volume of 100PG to be filled should be equal to the sum of emission and specified volume of old liquid
reservoir dryer core.

1679

Replacement of any pipe assembly (hose/pipe or pipe
assembly)

30 ml

**

1.0

oz

**

The refrigerant lubricating oil capacity of the whole
system

150 ml

5.0 oz

R-134a

Refrigerant charging capacity

550±50 g

1.21±0.11 b

*It may cause natural leakage of refrigerant, and will not cause refrigerant oil loss. Due to the large number of
leaks, hose rupture and collision or pressure release valve opening,
The refrigerant is suddenly lost. When replacing the parts resulting in a hug loss of refrigerant, be sure to add
sufficient lubricating oil for them.

8.2.1.4 Resistance Properties of Evaporator Temperature Sensor

NL08-2022b

温度

阻值

（

C

）

（

k

）

Temperature (°C)

Re

si

sta

nce

value

(K

Ω

)

1680

8.2.2 Description and operation

8.2.2.1 Description and operation

1 Overview

The automatic A/C system will provide comfortable riding environment to the passenger no matter how the
outside weather is; and the system consists of the following main parts:

– Refrigeration

system

– Heating

system

– Air distribution system

–

Mode /temperature control system

2 Compressor:

The A/C compressor is driven by the engine crankshaft driving the compressor clutch belt pulley through the
transmission belt; when the electromagnetic clutch coil is not energized, the compressor belt pulley freely rotates
without driving the compressor shaft; after the clutch coil is energized with voltage, the clutch plate and the hub
are pushed to the belt pulley and are locked integrally through the magnetic force to drive the compressor shaft.
The compressor is equipped with a unique lubrication system. The oil absorption port of the crankshaft discharges
through the rotating swash plate, such a path allows the lubrication of the swash plate bearing. The rotation
generates the effect of engine oil separation; certain engine oil is separated from the leakage liquid at the
crankcase liquid suction port to reflow back into the crankcase. Refluent engine oil can lubricate the mechanical
part of the compressor.

The compressor is closed with the following conditions:

–

Full throttle valves are "ON"

– Low

idling

–

Ambient temperature is low

–

Engine coolant temperature is too high

Pressure of refrigerant is higher than 3.2MPa (464.1pounds/ square inch) or lower than 0.2Mpa (21.9 pounds/
square inch).

Notes:

Do not impact, have fall or keep top down the compressor. If the compressor is impacted or kept top down, you
should rotate the compressor clutch 5 to 6 times with hand to circulate the engine oil precipitated in the cylinder.
When the engine oil is in the cylinder, sudden revolution of the compressor will cause the valve to be damaged
and have adverse effect on the durability.

3. Condenser.receiver

dryer

High-temperature high-pressure refrigerant steam from an air condition compressor is flowed into a condenser.
The condenser consists of an aluminum pipe capable of performing rapid heat transmission and a cooling fin,
wherein the cooling fin condensates the high-temperature high-pressure refrigerant steam into
medium-temperature high-pressure liquid through radiation. Located on the left side of the condenser, the stored
fluid dryer is welded with the condenser as a whole. The internal structure design of the stored fluid dryer can
ensure the moderate temperature and high pressure refrigerant entering the dryer is in a mixed status of gas and
liquid and the moderate temperature and high pressure refrigerant coming out of the dryer is in the liquefied
status.

The stored fluid dryer contains drying agent which can absorb the moisture of the refrigeration system and the
drying agent cannot be reused. Due to the following reasons, the receiver-dryer core can not be repaired but
replaced when leaking.

– Perforation

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–

Seal area damaged

–

Time is too long for external air enter into the system

4. Indoor temperature sensor, outdoor temperature sensor

The following sensor affects the automatic control of the in-vehicle air temperature:

–

Indoor temperature sensor

–

Outdoor temperature sensor

These sensors are thermosensitive elements sensitive to temperature; the resistance and the temperature of the
sensor are in inverse proportion corresponding relationship; the level of the signal transmitted to the A/C control
module is determined by the resistance value; and the A/C control module sets the command signal needed to the
following parts by using the information.

–

Inside and outside circulation motor

–

Cool-warm temperature wind direction motor

–

Blower motor control module

The indoor temperature sensor housing is connected with the inhaler through the hose pipeline, the air flow from
the A/C head unit forms a minute vacuum degree at the end part of the inhaler hose; and such vacuum formation
realizes the following functions.

–

To make the indoor air flow through indoor temperature sensor.

–

Improved accuracy of sensor detecting temperature

The outdoor temperature sensor is located in the front grid area below the front bump of the vehicle; the A/C
control module uses the sensor to obtain the ambient air temperature information; and the information A/C control
module can be used for displaying the outside terminal on the instrument display screen.

5. Sunlight

sensor

The sunlight sensor is located in the middle of the upper trim cushion of the instrument panel . The sunlight sensor
belongs to the light energy sensor, which can measure the heat produced by sunlight hitting the vehicle to provide
more compensation parameter to the A/C control module. A/C control module automatically adjusts the A/C
volume and cold/hot wind mixing proportion in real time according to the state of the external illumination
intensity, so that all passengers are able to get the most comfortable feeling.

6. Indoor temperature sensor

The indoor temperature sensor is integrated in the automatic A/C control panel to connect with the suction hose;
and the in-vehicle temperature is collected through the suction of the wind direction passing through the inside of
the warm air assembly housing.

7. Main host of indoor A/C

The indoor A/C head unit is located in the instrument panel , including a blower motor, a blower motor control
module, an A/C filter, a heater core, an evaporator, an expansion valve, a warm and cold temperature wind control
motor as well as a variety of air deflection throttles and ventilation ducts.

A. Blower

motor

Notes:

When placing the blower motor, the fan wheel of the blower motor can not be used as the supporting surface.

To prevent the fan wheel blade from being damaged, inhibit collision of the fan wheel.

The blower consists of the following parts:

–

Permanent magnet-type motor

– Squirrel-cage

fan

1682