Liquid Receiver – Everything You Need to Know
Maintaining optimal efficiency and ensuring smooth operation requires specialized components in refrigeration and HVAC systems.
One such essential component is the liquid receiver.
This blog explores liquid receivers’ purpose, functionality, and significance, offering valuable insights for professionals and beginners.
What is a Liquid Receiver?
A liquid receiver is usually a storage or holding tank for liquid refrigerant. It is a crucial part of a refrigeration system.
If you don’t understand the refrigeration cycle, please check what is refrigeration cycle.
A liquid receiver is located between the condenser and evaporator and stores liquid refrigerant after it condenses in the condenser.
This only supplies liquid refrigerant to the expansion valve and ensures an adequate supply of refrigerant to the evaporator, maintaining the refrigerant system’s efficiency and preventing operational disruptions.
There are some key functions of a liquid receiver in a refrigeration system:
Refrigerant Storage: When a system does not need maximum heat load, there is less refrigerant circulation, which remains extra for refrigeration receiver capacity. In that case, a liquid receiver stores this uncirculated refrigerant.
Liquid Refrigerant Supply: A liquid receiver ensures only liquid refrigerant enters the expansion valve.
Refrigerant Reservoir: When the system pump is down, a refrigerant liquid receiver also acts as a refrigerant reservoir or holding tank, ensuring a consistent supply.
Pressure Control: A liquid receiver also balances pressure in the refrigeration cycle during mass flow rate fluctuation and absorbs it to optimize performance.
Trapping non-condensable gas: It also traps non-condensable gas in the system at the top.
How Does A Liquid Receiver Work?
A liquid receiver has a receiver valve, a liquid receiver service valve, and a safety valve as its key components.
When the system’s load is less than the maximum head load it can operate, there is less need for refrigerant.
The liquid refrigerant receiver can hold up to 80% of the system’s entire refrigerant, which the evaporator does not need immediately.
The liquid receiver receives refrigerant as a high-pressure liquid, controls the refrigerant flow by the receiver valve, exits to flow toward the expansion device, and only allows liquid refrigerant to reach the evaporator, preventing system inefficiencies.
The liquid receiver needs regular maintenance to function correctly, as they commonly have leaks, debris buildup, and incorrect refrigerant charge. Its liquid receiver service valve allows for maintenance pressure adjustment.
The pressure relief valve/fusible plug or safety valve prevents the unit from any accident in case of fire or high-pressure switch damage.
Function of Refrigerant Liquid Receiver in Refrigeration System
The refrigerant liquid receiver is installed between the condenser and expansion valve, it has the main functions in the following:
√ It can be the compensation for the condenser when the pressure change causes the refrigerant volume to change.
When the refrigerant volume is not enough because of the evaporation capacity increasing, the liquid receiver will compensate for the refrigerant volume for the system.
Of course, when the evaporation capacity decreases, the extra refrigerant will be stored in the refrigerant liquid receiver to protect the compressor.
√ As the extra device, the refrigerant liquid receiver can help to separate the gas refrigerant and liquid refrigerant, ensuring the pure liquid refrigerant comes out from the liquid receiver.
√ As the sealing device for the high-pressure side and low-pressure side, it prevents the high-gas refrigerant and No-coagulant gas enter the low-pressure side.
At the same time, it has the filter and muffler function in the system.
Where is the Liquid Receiver Installed?
The standard refrigeration liquid receiver is installed between the condenser and the expansion valve in an outdoor installation.
A liquid receiver in a refrigeration system is installed inside equipment racks for commercial refrigeration setups.
It is best practice to install the receiver refrigeration in the liquid line as close as possible to the condenser outlet.
To ensure a smooth refrigerant flow, system reliability, excessive friction pressure loss, or gas binding, the condenser and the receiver should have a free drainage piping line.
Many people ask where the liquid receiver is located to know if there are precautions they should be aware of.
Yes. A liquid receiver location should not be placed in direct solar radiation or building heating equipment.
It might add extra heat to the refrigerant. The liquid receiver HVAC system can have stud mounting or leg/bracket mounting based on whether the receiver is part of multiple compressor packs or standing alone.
How Many Types of Liquid Receivers Are There?
Liquid receivers typically have two primary types based on their orientation: horizontal liquid receivers and vertical liquid receivers, which have different applications and advantages.
Horizontal Liquid Receiver: A horizontal liquid receiver is commonly used in larger refrigeration systems with height constraints. It can hold up to 2000 litres and is suitable for HFC/HFO refrigerants.
Vertical Liquid Reciever: A vertical liquid receiver is suited for compact systems with limited horizontal space. These receivers can hold 1 to 60 liters and be installed in the liquid line of HVAC&R units.
Other types of liquid receiver: There are some other types of liquid receivers, too, like a Bi-flow liquid receiver, designed with both IN and OUT connections and a long dip tube that goes to the bottom of the vessel, typically used in heat pumps and air conditioners; an Ammonia Liquid Receiver, designed for ammonia-based systems; and a liquid line receiver, specialized for liquid line connections.
Please check Liquid Reciever to know more types.
Why Do You Need a Refrigerant Liquid Receiver for the HVAC&R System?
The high-pressure and high-temperature refrigerants become liquid or gas refrigerants after the condensing by the condenser.
But it has to be liquid refrigerants to enter the evaporator, that can ensure a good cooling function, that’s why you need a refrigerant liquid receiver.
It will reserve the high-pressure refrigerants, and then send the liquid refrigerants to the evaporator from the bottom of the refrigerant liquid receiver.
This can make sure the function of the evaporator reaches its limit.
Then achieve a good cooling function for the whole system.
They can used for refrigeration systems, HVAC systems, air conditioner systems, etc.
Features of Miracle Refrigerant Liquid Receiver
VLRD refrigerant vertical liquid receiver features:
√ The body adopts a stainless steel structure design, which has a longer life.
√ The refrigerant liquid receiver body weld on the middle of the body, which has fewer welding spots and has better and more reliable sealing.
√ The outlet of liquid refrigerant uses the shut-off valve, and the inlet of liquid refrigerant uses a welding connection.
√ The installation angle has no limit for the shut-off valve, you can also choose a sight glass for your liquid receiver.
√ To ensure the best performance, it’s better to install the liquid receiver vertically.
√ We use ODF for standard connection, if you have special demands, please let us know in advance.
√ We provide customized refrigerant liquid receivers for vertical types from 1L to 21L.
Related Links: Refrigerant, What is refrigerant gas.
VLRC refrigerant vertical liquid receiver features:
VLRC liquid receiver is a two-sided welding-type refrigeration liquid receiver, it also has to be installed vertically.
The refrigeration liquid receiver has an important role in the compressor, it consists of the Body, inlet, outlet, screen, etc.
It is mounted on the suction tube area of the evaporator and compressor for the air conditioning system.
To prevent the liquid refrigerant flow into the compressor.
That will cause the liquid hitting situation and damage the compressor, with a refrigeration liquid receiver will solve that problem very well.
It is very similar to a type of refrigeration liquid receiver, the difference is for the welding position welds in the middle of the refrigeration liquid receiver body.
VLRC welds on both sides of the liquid receiver.
This is related to some production processes, but won’t affect the use, just pick the type you like.
Features:
√ For a standard refrigeration liquid receiver, we use an ODF inlet and equip a rotalock valve on the outlet.
√ We do not equip the safety valve and sight glass for the standard liquid receiver.
√ We do customized liquid receivers for your refrigeration equipment.
√ Working pressure 33BAR, testing pressure 48BAR.
√ It is suitable for all the common refrigerants, such as R22, R507C, R134a, R407c.
If your system is filled with R410 refrigerant.
Please inform us in advance and we design a suitable liquid receiver for you.
Horizontal refrigerant vertical liquid receiver features:
√ For best operating, make sure to install the refrigerant liquid receiver horizontally.
√ It is suitable for HFC, HCFC, and CFC refrigerants.
√ We equip the rotalock valve with standard parts, if you need sight glass or a safety valve, please let us know.
√ Good corrosion-resistant powder coating for the whole body, make sure it can be used in any environment and has a long life.
√ We can do a customized horizontal refrigerant liquid receiver from 1L to 40L.
HLR refrigerant vertical liquid receiver features:
HLR Horizontal refrigerant liquid receiver is similar to HLRD series refrigerant liquid receiver.
It should be installed horizontally for better performance.
The difference is that HLR has a bracket on the body to leave space for the compressor to be installed, which is more convenient for customers when installing condensing units.
Features:
√ The Rotalock valve is a standard part, but the sight glass is optional.
√ The liquid level sensor is an optional part, we use imported brands.
√ With brackets for compressor installation easily
√ A stainless steel body ensures its long life and better pressure affordability.
√ Suitable for all the common refrigerants, please inform us in advance if your system uses R410 refrigerants.
√ We do customized refrigerant liquid receivers from 30L to 100L, any special requirements.
We can also customize vertical and horizontal refrigerant liquid receivers for big volumes for different applications, even more than 200L.
Please get in touch with our engineering team for a special design if you need it.
Liquid Receiver and Refrigeration Unit
We have rich experience in providing you with reliable refrigerant receivers.
They can be used for horizontal condensing units, scroll condensing units, Bitzer condensing units, freezer condensing units, etc.
At the same time, we also provide you with refrigeration units for different applications.
They include cold room refrigeration units, walk-in cooler condensing units, and monoblock refrigeration units.
If you are looking for a suitable refrigerant receiver for your refrigeration and air conditioning units, please contact us now.
Liquid Receiver vs. Accumulator: Key Difference
A suction accumulator and a liquid receiver are the essential parts of a refrigeration system, but with apparent differences.
A liquid receiver located in the liquid line after the condenser stores excess liquid refrigerant that isn’t needed for the current heat load, ensuring a steady flow to the evaporator.
On the other hand, a suction accumulator is located on the suction line before the compressor, preventing liquid refrigerant from entering the compressor and protecting it from damage.
To talk about accumulator vs receiver, the difference between a liquid receiver and a suction accumulator is in their function, purpose, and location.
Functional Difference: A liquid receiver manages refrigerant storage, while accumulators safeguard the compressor, allowing only vapor to flow.
Purpose: The receiver stores extra refrigerant when the system operates at a lower heat load, but an accumulator catches and holds any liquid refrigerant that doesn’t boil off in the evaporator.
Location: Receivers are positioned after the condenser, but accumulators are placed before the compressor.
Here is our detailed guide on suction accumulators – everything you need to know.
Liquid Receiver One-Stop Shopping
If you need refrigerant liquid receiver parts for your project or HVAC unit.
We can provide you with liquid receivers and parts that can replace famous brands.
Such as refrigeration valves, including solenoid valves, rotalock valves, ball valves, check valves, air conditioner valves, etc.
Miracle one-stop shopping aims to save your time, save your money, lower the risk with new suppliers, and arrange the best shipment for you.
Send us your order now, you will have more time to focus on your business from now.
Why Miracle Liquid Receiver
Miracle production team has a mature inspection process to guarantee every process can be finished with the standard demand.
From raw material purchasing to the final packing, every production process has its own operating instructions, and there are inspectors to inspect every detail, and there is a traceability system for them, so every worker will be more responsible for their work of liquid receivers.
Miracle has its own experienced R&D team, they will keep on improving the production technology, improve the operation instructions for every production process, and also provide technical support to customers, including custom liquid receivers.
With their effort, now we have ISO and CE certificates, which can greatly guarantee the liquid receiver quality for you.