Car heating and air conditioning equipment, which is what we usually call air conditioning. Its main function is to provide comfortable temperature for the occupants in the car at different external temperatures. Guaranteed good visibility through all windshields. Provide a relaxed and enjoyable environment for the driver. Clean the air with a filter that uses particles, pollen, or even odor.
This article refers to the address: http://
Heating regulates the heating function of many countries, especially the removal of deposits or frost on windshield. Changes in the outside air temperature of the car and changes in the speed of the car cause fluctuations in the air temperature inside the car. Continuous manual air conditioning is required on vehicles without air conditioning equipment. The electronic heating adjustment can maintain almost the desired and set internal air temperature of the car. 
On the water side regulating heating device, the temperature sensor measures the temperature of the air inside the vehicle and the temperature of the air flowing out of the vehicle. The temperature regulator processes the measurement and compares it to the temperature setpoint that needs to be adjusted. The temperature regulator transmits a voltage pulse to a solenoid valve located in the cooling medium circuit according to a certain algorithm, and opens and closes the solenoid valve according to a certain pulse cycle frequency. The flow rate of the cooling medium can be adjusted from zero to maximum by changing the pulse width within the same pulse cycle time. On the air side regulating heating equipment, mostly through a geared motor, stepless adjustment of the cold / hot air mixing valve (occasionally also through pneumatic linear drive, stepless adjustment of the cold / hot air mixing valve). For special heating requirements, heating equipment with separate air temperature adjustments in the left and right sides of the vehicle can also be used.
The electronically regulated heating of the air conditioner can achieve the comfort of the occupant to a certain extent. When the external temperature of the car is higher than 20 °C, the temperature inside the car needs to reach the ideal state, and only the compression refrigeration equipment and the refrigerant medium R134a can be used to cool the air temperature inside the vehicle. Further, moisture carried out by the cooled air will be precipitated as condensed water, thereby obtaining cool and dry air. 
The advantage of a car equipped with heating and cooling equipment is that the air can be adjusted automatically. It is difficult because the driver wants to meet the comfort air required by all the occupants in the car. Especially for the driver of the bus, he only feels the temperature of the air inside the car in the front of the car. Air temperature, air volume and air distribution with program selection. These parameters are always related and cannot be changed arbitrarily. 
A compressor driven by an engine that compresses and heats a gaseous refrigerant medium. It is cooled in the condenser to become a liquid, and the heat of cooling is released into the surrounding air. The expansion valve injects the cooled refrigerant into the evaporator, and in the evaporator, absorbs the heat of vaporization required by the refrigerant medium from the fresh air passing through it. The moisture contained in the fresh air that has been cooled is condensed to produce cool and dry fresh air. 
The interior air temperature regulation loop is the core component of the air conditioning system. The set temperature value can be obtained by adjusting the air side or water side temperature. The fresh air drawn in by the fan is cooled by the evaporator or heated by the hot body and transported to the vehicle according to the position of each tuyere. The electronic control unit detects all important temperature influence parameters, interference parameters and the air temperature of the vehicle selected by the occupant on the temperature setter according to various temperature sensors, and obtains the current air temperature set value. Comparing the air temperature setting value with the actual temperature value of the vehicle air can obtain a temperature deviation between them. The electronic control unit determines the heating amount of the hot body and the heating adjustment of the solenoid valve according to the temperature difference, or determines the cooling regulation of the evaporation capacity of the liquid refrigerant medium of the evaporator and the compression amount of the gaseous refrigerant medium of the compressor, and the adjustment of the fresh air amount by the fan. Another adjustment function is to activate the individual air outlets that regulate the air distribution according to the occupant adjusted air temperature program. All air distribution adjustment loops can be changed by manual operation.
Quick Turn PCB fabrication and assembly service - Fast Turnaround PCB Prototype
My Dear customer friend, if your work needs to be completed as quickly and efficiently as possible, then you should choose Jinghongyi PCB as your best choice, because we know that speed is an important component of modern business equation. Forever!. We have fast turnaround PCB features, including Quick Turn PCB Manufacturing and PCB Assembly services, which can meet your tight project deadlines. We have a quick response mechanism to ensure that you speed up your order throughout the process (from quotation to delivery). Like all our services, our fast turning process is done internally, all of which are under one roof without outsourcing. Jinghongyi PCB is proud to be able to provide all customers with fast turnaround PCB services, including full certification of defense products.
Quick Turn Circuit Board Solutions:
We are a professional Quickturn PCB manufacturer from China. Engineers, assemblers, and designers from around the world have counted on us for their quick turn PCBs. Companies of all sizes know that they can rely on our key mission PCB.
We have the industry's leading percentage of punctuality, which has effectively solved many pressing issues for customers.
With our manufacturing facilities, we can provide quick turn circuit board FAB service and quick turn PCB prototypes solutions for all types of industries, including Medical, Transportation, Industrial Applications, Consumer Products, Aerospace, and Military.
Every online PCB order includes a full engineering review before your circuit board manufacturing begins, eliminating delays and quality problems.
- Quick Turn Delivery Option
- 24 Hour quick turn PCB orders.
- Printed Circuit Board pricing is available for 1-20 day deliveries.
PCB Order Quantities
We don't specify the quantity of PCB orders. You can be quick turn Prototype PCB . It doesn't matter if the quantity is only one piece. We also provide small and medium batches and large orders.
We not only have no requirement and limitation in quantity, but also provide low cost quick turn PCB manufacturing service and assembly service as before, no matter how much the order is.
Due to production capacity, labor costs, spare parts procurement costs and other factors, we do not recommend that your quick turn PCB be carried out elsewhere. Quick turn PCB China has unique advantages, such as low price, exquisite production technology and timely and fast delivery capacity.
Quick Turn Prototype PCB
JHYPCB prides itself as one of leading suppliers of fast turnaround PCB prototype and low-volume production in the world. Our turn time can be as short as 24 hours after your Gerber files being reviewed and approved by our engineers, greatly saving you time in your work.
Delivery cycles are critical in prototyping new PCB designs. For your business, testing your design faster than your competitors is a competitive advantage. Today, big companies like Space X, Honeywell and Boeing are speeding up delivery times to get into the market faster. Let's learn more about your products and goals so that we can better understand the more success you need.
You may choose other time schedules to fit your budget, if your work timeframe is not that tight. We offer 48-hours and 72-hours shipping too.
In addition to the rapid prototyping version, we also provide other types of quick turn Printed Circuit Boards production services, such as:
Quick Turn PCB Assembly
Based on fast PCB manufacturing and fast steering component procurement support, we can ensure PCB assembly production.
Our PCB assembly delivery time is the shortest in the industry. For prototype PCB, our delivery time is 24/48 hours or 5/10 days. For small batch production orders, you can choose delivery time of 10, 15 or 20 days. For medium-volume orders, we offer 15, 20 or 25 days.
With state-of-the-art surface mounting and through-hole equipment, we can assemble PCBs, including SMT, through-hole and hybrid technologies. We also carried out BGA rework and X-ray testing. We can assemble single-sided or double-sided PCBs using surface mount packages.
If you demand quick turn PCB Board , just tell us your idea, we will make it!
Quick Turn PCB
Quick Turn PCB,PCB Sample,Proto PCB,Fast PCB Prototype
JingHongYi PCB (HK) Co., Limited , https://www.pcbjhy.com