Quantcast
Jump to content
  • Welcome to Auto Parts Forum

    Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, Twitter, Google, and LinkedIn. 

     

Truck refrigeration system components


Recommended Posts

 

link hidden, please login to view
 consists of four parts: compressor, condenser, expansion valve and evaporator.

link hidden, please login to view

1.compressor

The compressor is the power of the refrigeration cycle and is driven by an electric motor to continuously rotate. It can not only extract the vapor in the evaporator in time, maintain low temperature and low pressure, but also increase the pressure and temperature of the refrigerant vapor through the compression function, creating conditions to transfer the heat of the refrigerant vapor to the external environment medium. In other words, the low-temperature and low-pressure refrigerant vapor is compressed to a high-temperature and high-pressure state, and room temperature air or water is used as a cooling medium to condense the refrigerant vapor.

 

The function of the compressor is to compress low-pressure steam into high-pressure steam, thereby reducing steam volume and increasing pressure. The compressor sucks the working medium vapor with lower pressure from the evaporator, and sends it to the condenser after the pressure increases. The high-pressure liquid is condensed in the condenser. After being throttled by the throttle valve, it becomes a low-pressure liquid and is sent to the evaporator. In the evaporator, it absorbs heat and evaporates into low-pressure steam, which is then sent to the compressor inlet to complete the refrigeration cycle.

 

2.Condenser

 

The condenser is a heat exchange device that uses the ambient cooling medium (air or water) to take the heat of the high temperature and high pressure cooling steam from the cooling compressor, so that the high temperature and high pressure refrigerant vapor is cooled and condensed into a high pressure normal temperature refrigerant liquid. It is worth mentioning that in the process of transforming refrigerant vapor into refrigerant liquid, the pressure of the condenser is constant and still at high pressure.

 

3.Throttle element (namely expansion valve)

 

The high-pressure and normal-temperature refrigerant liquid is directly sent to the low-temperature scale evaporator. According to the corresponding principle of saturation pressure and saturation temperature, the pressure of the refrigerant liquid is reduced, thereby reducing the temperature of the refrigerant liquid. The high-pressure and normal-temperature refrigerant liquid passes through the throttling element of the decompression device to obtain a low-temperature and low-pressure refrigerant, which is sent to the evaporator to absorb heat and evaporate. In daily life, capillary tubes are often used as throttling elements for refrigerators and air conditioners.

 

4.Evaporator

 

The evaporator is also a heat exchange device. The low-temperature and low-pressure refrigerant liquid evaporates (boils) into steam after being throttled, absorbs the heat of the material to be cooled, reduces the temperature of the material, and achieves the purpose of freezing food. In the air conditioner, the surrounding air is cooled to cool and dehumidify the air. The lower the evaporation temperature of the refrigerant in the evaporator, the lower the temperature of the cooling substance. In the refrigerator, the evaporation temperature of the general refrigerant is adjusted to -26°C to -20°C, and in the air conditioner, it is adjusted to 5°C to -8°C.

 

We have over 20 years history and are TOP 1 export manufacturer among all Chinese Truck refrigeration system Suppliers. We not only provide high quality products, but also provide Professional technical support, Timely after-sale service,big project developing support,Key client developing support and so on.

 

We are seeking for dealer worldwide, welcome to visit our Truck refrigeration system factory to cooperate with us!

link hidden, please login to view

You are also welcome to follow Corunclima on 

link hidden, please login to view
& 
link hidden, please login to view
!

 

link hidden, please login to view

Truck refrigeration system V450F for midtrucks from 12-28m³

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Similar Topics

    • By Counterman
      Now part of the Rislone Hy-per premium performance-chemical family, Rislone Hy-per Cool Radiator Cleaner & Super Flush (p/n HFL400) is formulated to remove damaging coolant deposits that build up over time and cause engine overheating.
      It also neutralizes acids and helps prevent the formation of scale deposits for longer system life. Its Heavy Duty Xtreme Clean formula cleans the entire cooling system, removing solder bloom, oily residue, rust and scale.
      “One of the unique elements of Rislone Hy-per Cool Radiator Cleaner & Super Flush is that it includes a water pump lubricant and inhibitors that protect the water pump during cleaning,” explains Clayton Parks, vice president of strategic development for Rislone. “This helps prevent other coolant-related issues from developing due to the flushing process.”
      Rislone Hy-per Cool Radiator Cleaner & Super Flush is fast, easy and safe to use in all cooling systems. It removes deposits and coolant gel for a complete cleaning in about 30 minutes. Another benefit: Clean systems run cooler. Customers can use Super Flush every time coolant is changed, whether for light system flushing or heavy-duty cleaning. Rislone recommends treating systems of up to 16 quarts with one 16-ounce (473-millileter) bottle. 
      For best results, add a bottle of Rislone Hy-per Cool Super Coolant when refilling the system to deliver optimal heat transfer performance.
      Like all Rislone Hy-per products, Radiator Cleaner & Super Flush is made in the U.S.A. For a limited time, get a $5 mail-in rebate with every purchase of Rislone Hy-per Cool Radiator Cleaner. Visit 
      link hidden, please login to view to learn more. Check out Rislone Hy-per Cool Radiator Cleaner & Super Flush, as well as the full Rislone lineup, in booth 3616 at AAPEX, Nov. 1-3, 2022 at the Venetian Expo in Las Vegas.
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      Photo caption: Eric Rosteck, Mary Beth Moning, Renee Sandford, Hannah Rayburn, Martin Redilla, Tina Hubbard, Bryan Funke, Laura Hewitt and Danielle Orlando
      The University of the Aftermarket Foundation (UAF) announced that HDA Truck Pride is a new lifetime trustee and thanked the program group for its generous support.
      The University of the Aftermarket Foundation lifetime-trustee designation is reserved for exceptional donors who support the UAF mission of providing scholarships and educational opportunities for the next generation of aftermarket professionals. Tina Hubbard, president and CEO of HDA Truck Pride, will serve as the company’s representative on the UAF board of trustees.
      “It is a privilege to be a part of the University of the Aftermarket board of trustees,” said Hubbard. “I look forward to increasing the attention and focus on the recruitment and education of the next generation workforce for the heavy-duty independent aftermarket.”
      “The University of the Aftermarket Foundation is proud to welcome HDA Truck Pride as a lifetime trustee,” said Bob Egan, chairman of the University of the Aftermarket Foundation. “We really appreciate Tina sharing her time and expertise as a member of the UAF board of trustees. With the foundation’s new heavy duty/diesel scholarships initiative, we know her insight will help UAF provide more scholarship opportunities to students entering this major aftermarket sector. We thank HDA Truck Pride for recognizing the importance of the UAF mission to the future of our entire industry.”
      The University of the Aftermarket Foundation is a 501(c)(3) not-for-profit organization, and all contributions are tax-deductible to the extent provided by law. To learn more about the University of the Aftermarket Foundation, apply for a scholarship or grant, or make a donation, visit
      link hidden, please login to view, link hidden, please login to view and link hidden, please login to view. The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      Camshafts are one of those components that can define an engine. Cams can have a direct effect on the efficiency, power curve, sound and even attitude of the engines they are installed into. Muscle cars and race cars are two examples of vehicles that are immediately recognizable by a loping, rumbling idle that builds into a deafening roar as they’re pushed harder and higher through their rpm range. 
      A “stock” camshaft usually is designed as a compromise between performance and drivability, with considerations for emissions and fuel economy, while performance cams trade much of the “politeness” of a stock camshaft in favor of brute horsepower. 
      If you were to open any of the major speed catalogs (or look up the information on their website), you’ll discover three things: Performance parts aren’t cheap; there are a LOT of cams to choose from; and each one is accompanied by a list of specifications including duration, lift, lobe separation and recommended rpm range/usage. But what makes one cam any different from another, and what do some of the terms used to describe a performance cam actually mean?
      Duration refers to the amount of time (expressed in degrees of crank rotation) that an intake or exhaust valve is “off” of its seat. This equates to the amount of time the valve is open, allowing air to enter or exhaust to escape. Generally, a longer duration means a “deeper breath” (or exhalation), although the amount of overall airflow through the cylinder is also affected by “lift.”
      Lift, or more specifically, “valve lift,” is the distance the valve travels as a result of the action of the camshaft. As the cam rotates on an overhead-valve (OHV) engine, the eccentric lobes act directly upon the lifter, raising it (and the pushrod above) a specified distance. The pushrod transfers this “lift” to a rocker arm, which in turn presses down on the valve, releasing it from its seat. Valve-spring pressure helps the valve close at the end of its cycle, and keeps the valvetrain components from clattering as they return to a resting position.
      In an overhead-cam (OHC) design, the cam lobe contacts the rocker arm directly, or against the valve itself when paired with a “bucket tappet,” which protects the valve stem from wear. The design of a rocker arm also multiplies the lift imparted by the cam lobe, creating more lift at the valve than at the lobe. Performance rocker arms use this advantage to improve lift without altering the existing cam profile.
      Us old-timers sometimes refer to camshafts as “bump-sticks,” as they seem to have lobes poking out in every direction. They are, however, precisely engineered to open and close multiple valves in a perfectly timed sequence to maximize their effectiveness. Lobe-separation angle (LSA) is a fancy name for the distance (again in degrees) between the centerlines of the exhaust and intake lobes on a shaft. This distance, along with the duration of the cam, will determine the amount of “overlap” in the movement of the intake and exhaust valves.
      Let’s look at a “racing” cam, and how its design affects performance. Intake valves open slightly before the engine begins pulling in air on the intake stroke. Call it a “head start,” but it helps promote airflow through the cylinder. As the piston reaches the bottom of its stroke, the intake valve is still open – pulling as much air as it can into the cylinder – then closes as the piston begins compression. Exhaust valves also open a bit before the power stroke is completed, with the pressure of the expanding gas helping “push” the spent exhaust out of the cylinder.
      With both valves slightly open at top dead center, more cool air is drawn in as the hot exhaust is expelled. This phenomenon is called “scavenging,” and at higher rpm can further boost horsepower. The smaller the separation between lobes (and the more duration) the more overlap will occur. Unfortunately, at idle and low rpm, it also causes a lumpy rumble, low engine vacuum and a lack of low-end power. Although many people (myself included) enjoy hearing this signature sound at the race track, it isn’t very useful in a daily driver! Choosing the right camshaft for your intended purposes begins with defining your intended purposes!
      Every camshaft design has a “sweet spot” – the rpm range at which it performs the best. Camshaft manufacturers’ rpm recommendations are a result of dyno-testing the unique combination of lift, duration, lobe design and separation engineered into each particular grind profile. If you aren’t going to be consistently operating in a cam’s specified rpm range, it may not be the best choice for your project. Your mostly stock, daily driven street vehicle won’t benefit much from a race-ready cam that really needs to rev up around 5,000 rpm to make maximum power. As with any other performance-part purchase, it pays to do your research before buying … no matter how cool the stickers will look on your toolbox!
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      The cooling system no longer is focused on cooling as much as it is on managing and maintaining a consistent engine and transmission temperature. Since our industry always seems to find a way to inundate us with new acronyms and terminology with every model year, it could be only a matter of time before they start to call it a Powertrain Heat-Management System (PHMS).
      Make no mistake: The name is not real – at least not yet. I just made it up. But it’s a very accurate representation of what a modern-day cooling system does. To understand the technology of today’s cooling system and why the name almost deserves a change, let’s first look at a brief history mixed with a touch of science.
      The term “cooling system” originally came about on the early automobile, and that’s exactly what they did. However, the early cooling systems were … simple. Scientifically known as “thermosyphon systems,” the hot coolant in the engine rose upward into the top tank of the radiator. As it cooled, it fell to the bottom of the radiator, where it then would flow into the engine block. The result was a continuous circulation of coolant through the engine, requiring no water pump or thermostat to make it work.
      Although the early cooling system worked well, it had no choice but to evolve, as engines got bigger and became more powerful. If you think about an engine on a scientific basis, it’s nothing more than a way to convert heat energy into mechanical energy. Basic logic tells us that the more power an engine produces, the more heat is generated that must be removed.
      Since cooling systems needed the ability to remove more heat, they quickly evolved into utilizing water pumps and thermostats. Thermostats always have had two purposes. First, the engine coolant must remain in the radiator long enough to transfer its heat to the air. When the thermostat is closed, it allows sufficient time for this to occur, and when it opens, the coolant flows into the engine and is able to absorb heat to begin another cycle.
      Second, engines need to operate near the boiling point of water. Why? Because water is a byproduct of combustion, and this high operating temperature ensures that water is evaporated from the engine oil during operation. Without the thermostat set to keep things hot, the engine oil cannot burn off water and will quickly become contaminated.
      Cooling systems, even as we entered the era of fuel injection and electronic management, remained fairly simple at first. But we knew that engine temperature was directly related to fuel economy, emissions and power output, and that maintaining that temperature where we wanted it was a necessary step to achieve our goals in those areas.
      It didn’t take long before the need for precise engine-temperature control became a prevailing factor affecting both engine and cooling-system design. Many components that we thought would never change began to receive a full dose of technology. Here’s a look at how things are shaping up for the future.
      Thermostats
      While not an everyday item yet, electrically controlled thermostats are being utilized in some applications, and I expect we’ll see an increase in this. The ability of an internal-combustion engine to achieve maximum fuel economy, minimum emissions and maximum power occurs at slightly different temperatures for different operating conditions. By adding this additional level of precision to temperature control, we can match temperatures to operating conditions, increasing power output and fuel economy.
      This need for precise temperature control is why modern fuel-management systems monitor coolant temperature and if there is any deviation outside of the expected norm, a very common diagnostic trouble code (DTC) is P0128 (“Engine Coolant Below Regulating Temperature”). As time goes on, we can only expect this to become a parameter that’s much more closely monitored.
      To further illustrate the advantage of an electronically controlled thermostat, consider traditional (old-school) thermostat operation. As the engine warms up, the radiator and hoses remain cold. When monitoring cooling-system performance as a technician, it’s common to keep a hand wrapped around the upper radiator hose. It stays cold until the thermostat opens; then it gets hot really quickly as the coolant flows from the engine into the radiator.
      Then we use our hands to feel the radiator tanks warming up, and when they do, we then expect that the electric cooling fans (if equipped) are due to come on within a few moments, and we often move our hand into the path of the air coming off of the cooling fan to sense the volume of airflow and amount of heat being drawn off the radiator. Hi-tech is watching the engine temperature on a scan tool while this happens.
      The point of this? The overall process of heat transfer is slow, and extreme precision is not possible with a traditional thermostat. As a result, the most advanced engine-management systems are looking ahead at engine temperature based on throttle position and calculated load, so that they can precisely manage engine cylinder and head temperature, effectively managing combustion efficiency. It’s impressive. Electronics and electronic thermostats make it all possible.
      Water Pumps
      What could possibly change about water pumps? That’s what I used to think, but they are changing. As effective as a traditional belt-drive water pump always has been, if we look at them from an old-school operational standpoint, as we did thermostats, we begin to see the flaws in their operation. Traditional belt-drive water pumps run the whole time at the speed of the engine, but with modern temperature-management technology, it’s not necessary for them to run constantly. Not only does this create an unnecessary drag on the engine, but it also can reduce the accuracy of precise temperature control.
      By redesigning the traditional water pump and adding electric water pumps into the system, unnecessary drag is eliminated, and the engine-management system is able to generate coolant flow when needed, as needed. This can help reduce warmup time and also improve overall temperature control.
      Electric water pumps also have the advantage of remote locations in engine compartments, which is beneficial as space becomes more and more constricted, and they are utilized for after-run features to help cool components such as turbochargers.
      Cooling Fans
      Electric cooling fans are not new by any means, but they no longer are a simple on-or-off type of fan. Early fans often employed a resistor to create both a low- and high-speed option, but many of today’s fans are pulse-modulated variable-speed fans that again give the engine-control module the ability to match fan speed with other operating conditions.
      Active Grille Shutters
      The newest member of the cooling-system technology family is the active grille shutter. Many manufacturers are utilizing this technology on certain vehicles, which, as you might have guessed, looks just like a set of shutters over some portions of the radiator. This can improve vehicle aerodynamics as well as decrease warmup times. They only open when needed to allow for additional cooling.
      Heater Cores
      Heater cores are part of the cooling system. Even though they don’t generally affect system function in the terms of engine-temperature management, inadequate heat stemming from a restricted heater core is a common complaint. But a restricted heater core is sometimes misdiagnosed as a bad thermostat or vice versa. And some vehicles utilize an electric water pump specifically to move coolant through the heater core. If the pump is bad, it could be misdiagnosed as a restricted heater core. Cooling-system diagnosis always should take into account the ever-increasing complexity of HVAC systems.
      Electric Vehicles
      Just when you thought there couldn’t be any more, hybrid and electric vehicles are bringing additional changes. Did you ever think you would see a high-temperature radiator and a low-temperature radiator? Plus, a water-cooled air-conditioning condenser? You’ll start to see them on electric vehicles.
      You also can throw in some valving and a high-voltage coolant heater to boost heater-core output, plus a completely different cooling circuit for the batteries, power inverter, transaxle and electric motor. The good news for us? There’s a lot more to fix and a lot more parts to sell.
      So, when will they start to call it a PHMS? And I’m waiting for the day of GPS-monitored temperature-sensing microchips that float around the cooling system, reporting the exact temperature of the coolant along the way. Sound crazy? Probably. But if it ever happens, just remember where you heard it first.
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view

    • DIY like a pro! Shop from over 1,000,000 Repair Manuals at eManualOnline.com! As low as $14.99 per manual. Shop now.


      DIY like a pro! Shop from over 1,000,000 Repair Manuals at eManualOnline.com! As low as $14.99 per manual. Shop now.


      DIY like a pro! Shop from over 1,000,000 Repair Manuals at eManualOnline.com! As low as $14.99 per manual. Shop now.

    • By Counterman
      FleetPride announced that it has acquired the assets of Nationwide Truck Service of Louisville, Kentucky.
      Founded in 1989 and owned by Eric Adkins, Nationwide Truck Service offers a wide range of repair services from its 21-bay facility and mobile repair units in addition to 24/7 roadside support.
      The Service Center at 355 Farmington Ave. will team up with the existing FleetPride parts branch at 4670 Jennings Lane in Louisville, “creating a complete value proposition for customers,” according to FleetPride. Adkins and his son, Jake, will remain involved in the day-to-day operations.
      “This is an outstanding opportunity for our valued customers and our team,” said Adkins. “Our customers will appreciate the access to a nationwide network of parts and service, and our employees will have the ability to grow and advance in FleetPride’s new service organization.”
      “We are truly excited to welcome Eric and Jake Adkins and the entire Nationwide Truck Service team to the FleetPride family,” said Cory Anderson, general manager and vice president of service at FleetPride. “Over the past three decades, the Nationwide team has become one of the most trusted independent service providers, which customers have come to depend on, in Louisville.”
      “Growth through acquisitions remains a focus for our company,” said Mike Harris, senior vice president of sales and operations at FleetPride. “We believe our value proposition resonates with owners of parts and service companies who are seeking a succession plan, or a partner that can provide a long-term foundation for their employees and customers. We look forward to the partnership with the Nationwide Truck Service team to carry on their tradition of service excellence while expanding service capabilities to our existing customers including large regional and national fleets.”
      FleetPride continues to grow its national parts and service operations. If you are interested in learning more about how to become part of the FleetPride network, visit 
      link hidden, please login to view for more details. The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
×
  • Create New...