A device that maintains a low temperature in a special chamber with thermal insulation is called a refrigerator. The principle of its operation is to use a refrigerator transporting heat from the working chamber to the external environment. If you have a problem with the refrigerator and you live in Saratov, contact our company. The repair of the refrigerator in Saratov is not a problem if the specialists of the Kholodremont company are engaged in it, we give a guarantee for the whole work performed.
The compression type refrigerators contain a compressor that promotes the refrigerant circulation by converting electrical energy into a mechanical. At the moment, such refrigerators are most popular. They differ in relatively low price, safety in operation and durability. The role of refrigerant is usually used by freons or an elaborate.
The main elements that make up the refrigerator include a compressor, evaporator, condenser, temperature sensor, thermoregulating valve, refrigerant, launch and thermal relay, electronic control unit.
What does the compressor consist of and how
The cooling system circuit includes evaporator, motor and condenser. All elements are closely interconnected. The compressor in the refrigerator is used to pump refrigerant into capillary tubes. The principle of operation of the part includes the following points:
- extracting freon vapors from the evaporator;
- supply of refrigerant to the capacitor;
- cooling and liquefaction of a gaseous colable;
- ensuring the movement of liquid freon through capillary tubes and filters-drying;
- The supply of a liquefied cooling substance into the evaporator (a boil process begins here, requiring the receipt of thermal energy from the surrounding space).
The course of the above processes helps to reduce temperature in the refrigerator chambers. Liquefied refrigerant acquires a gaseous state, the cooling cycle begins again. The compressor installation device depends on the type of parts. There are the following types of details:
- Dynamic. The design includes a case, motor and fans that superiminate the refrigerant.
- Piston. The design is similar to the structure of single.cylinder automobile engines. The compressor system includes shaft and motor.
- Rotation. The standard design of such a part includes a rolling cylinder located in the body of the corresponding shape.
Depending on the type of fan, the following types of compressors in the refrigerator are distinguished:
- Axial. The principle of operation is based on compression of the refrigerant by changing the speed of the substance between the rotor blades. Freon moves towards the rotor axis.
- Centrifugal. The principle of operation of the compressor of the refrigerator is based on the occurrence of discharge on the feeding side, as a result of which the refrigeon enters the fan blades. When rotating the part of the Freon is assigned to the side and distributed near the walls of the compressor case. At the output, the gas enters the diffuser, where the speed of the substance drops and the pressure grows.
The classification of dynamic attitudes is made according to the following criteria:
- the value of the final pressure;
- The number of gas liquefaction steps (multi.stage and single.stage)
- Type of drive (electric and turbine).
Dynamic compressors have the following advantages:
- simplicity of design that facilitates repair work;
- long service life;
- Ease of use (the device has small sizes, which reduces the weight of the refrigerator).
The disadvantage is the low efficiency. Such an installation is not capable of creating high pressure, which means that the refrigerator will not be able to work in intensive freezing mode.
The principle of operation of such a compressor is a reciprocal. Gas compression is ensured by a decrease in the volume of the substance when moving the piston. Piston systems are classified according to the following signs:
- type of drive (using linear or crooked-shaped mechanisms);
- the location of the cylinders (there are vertical, horizontal or angular parts);
- The number of compression steps (the compressor of the refrigerator can be one-, two- or three-stage).
When the engine is launched, the movement of the crankshaft begins in the middle part of the installation housing. The reciprocating actions of the piston lead to the removal of gas from the evaporator and its supply to the drive. Freon leaves the compressor when discharged and returns when heated. This helps to increase pressure and lure gas. The piston is arranged so that when the compressor is turned on, inlet and consumable valves are alternately.
A more modern design includes an inverter pulse supply scheme. The device consists of a rod and a piston located in the coil body. AC supply leads to the formation of a magnetic field launching the motor. The advantages of the compressor consider the durability and the possibility of creating high pressure. An increased noise level is considered a disadvantage.
The design includes 2 rotors. leading and led. Details move to meet each other, increasing gas pressure. There is no free space between the ramparts or the housing, so the portions of the refrigerant are not mixed and are easily captured by rotors. Freon compresses, after which it goes to the capacitor. The advantages of such a system are the following characteristics:
- lack of extraneous sounds and vibration;
- low electricity consumption (associated with the lack of need to increase the speed of rotation of the shafts);
- the ability to achieve high pressure indicators;
- durability of the structure;
- high.action coefficient.
The installation can be supplemented by the following elements:
- Plates. The introduction of such a part helps to get a greater power of gas compression. However, this contributes to the complication of the structure and the premature wear of the rotors.
- Swinging rotor. The use of refrigerants that do not contain chlorine leads to a decrease in useful pressure associated with the penetration of gas into the space between the rotor and the body. To reduce losses, the plate and shaft combine.
Rotary (screw) compressor
Known since the end of the 19th century. In such cooling nodes, the pressure difference arising due to the rotation of the rotor and the mobile plate changes the energy of rotation. Such compressors are installed in some models of refrigerated household appliances Indsitis.
- Significant compression coefficient.
- The absence of elements subject to high load and regular injection of oil into the steam chamber determines reliability and durability.
- You can adjust the performance by changing the speed with which the rotors rotate.
- Differs in small vibration, so it does not require a strong base.
- Relatively low noise level, so that the refrigerator can be installed in any room
- Small dimensions of the knot itself.
Efficiency changes in the state of freon inside the system. Constant speed of rotation of the shafts, determines a different compression force.
DIY compressor from the refrigerator
In general, a normal man without a tears will not throw away just like that an old non.working refrigerator with Compressor!We all have such a common feature, they say “Well, where are you throwing? It will come in handy someday!“”.And we decided it “someday“Turn into”Let’s do it!“Here is such a weighty unit we uprooted from an ancient box, similar to the Soviet refrigerator of the brand” Saratov “
How to Replace Refrigerator Compressor | Refrigerator Compressor not Running
The task arose to deal with all the entrances and exits, to check the performance, in fact, it was not difficult.Advice! Be careful, oil will definitely run from one tube when dispersing!This cylinder grunted quietly and we and we began the next stage with a calm soul.
While the ground is cut the “ears” for the springs and made a fastening from the profile pipe (20×40).
In a series with a free compressor, we got on a conventionally paid (50 rubles) such barrels of about 14 liters (we could not find the volume among the factory characteristics), capable of holding breathtaking 36.8 atmospheres! (The declared critical pressure), although the protective valve will work much earlier I willingly agree without subjecting the last figure to doubts, t.to. Practically, it was found that an ordinary plastic bottle of soda holds 4 atm (the costs of youth, inquisitiveness of the mind and all that🙂
Cut off the excess from the handles and drilled holes under the hairpin of 8mm, and also under the copper tube 8mm.They wanted to find fittings for the Freon cylinder, as a result, they decided to weld ordinary gas (Native fittings are specific, as a result, the price tag for accessories is overestimated).
The frame (30x40x74cm) was based on a profile pipe 20x20mm, 6 meters with a thickness of 1.5 mm to facilitate the structure, however, it is still very strong and the total weight eventually amounted to about 18 kg.
We make studs for cylinders, then a grid for sidewalls.
It took about one and a half meters a profile pipe 10x10mm. To grab the grid to the pipe, graphite contacts from a trolebus (used) were needed.
We go to painting (Of course, we first collected and checked everything, about this further..).
Even passers.by cannot resist painting from the balonchik 🙂
Rubber gaskets were cut out of the bicycle chamber, they do not allow to scratch the paint, t.to. The motor has vibrations. Aluminum substrate serves as a similarity of the radiator.
It’s clear that it took a detailed list at the end of the article.Pressure gear, relay (reset on the right value), pistol and hose (10 m for the garage seemed short)
Manometer, fittings for cylinders and tubes, tee, fum tape, copper tube, safety valve.
Advice! Pneumo-fiting may not be iron, I had to go shopping, in the Baucenter (not advertising) they found what you need, check the alloy, maybe brass!Oil separator (in plans to help), fuel filter and relay for launching the refrigerator motor.
The design is significantly lacking in the oil separator (a glass with a paper filter) is primarily needed for a spray gun, for insurance, because old compressors can spit with butter.
This is what we did 🙂For work
The compressor works quite quietly, very warm-intensive, for example, with the support of 4 atm in receivers, it almost heats up, but when reaching 5-6 atm and higher it warms up to 50-60 degrees and cools down for a long time (more than 8 atm has not experienced). 6 ATM dials in 16 minutes.
Fluffing a smart table with PC inside.
Troubleshooting Compressor Problems in Refrigerators
A small flow on our next project 🙂
Want to see right now? In YouTube, type RFGIX
Advice! who will collect something similar, one cylinder from under Freon as a receiver is catastrophically few, you will be disappointed only. Take two or other container with a large volume, but not a gas cylinder)) a terribly heavy structure will turn out with low performance.
Second advice: compressors in old refrigerators have less performance, in modern refrigerators they are more powerful and productive! In addition, the majority with electric protection systems.
Conclusions: if you are overflowed with enthusiasm and do not find a place for yourself or you have a living compressor and you want to breathe in it for 2 life or someone to prove something even to yourself-go ahead, dare! (but after you read the list.)
Features of the device and operation of refrigerators with the “crying” evaporator system
It will get rid of excess moisture accumulating inside the chamber, not only using the No Frost system. A fairly simple, but no less effective design called the “crying” evaporator today is installed even in budget models of household refrigerators. over, it is much more economical, compared with the above system.
In this case, the evaporator is hidden under the rear wall of the chamber. When the compressor is turned on, the cooling process is launched, as a result of which condensate appears on it, forming a layer of hoarfrost. However, after the compressor is turned off, the wall begins to heat up. Respectively, hoar gradually melts.
Open.type condenser of the drip system of defrosting the refrigerator. In most models, the capacitor is hidden behind the plastic wall.
By its name, this system owes the method of draining thawed water, which moves along the wall with droplets, falling through the drainage hole into the hose. The same, in turn, is connected to a container, which, as a rule, is attached to the compressor body.
The only thing that can be noted is that each camera has its own evaporative element, and these both compartments are completely isolated from each other. The very principle of operation of a two.chamber unit is that Freon, before entering the refrigerator’s camera, is first cooled by the evaporator in the freezer to a certain mark, and only after the cooling he enters the above compartment, where he takes the heat, and everything happens according to the already described. Above the work cycle. As soon as the required temperature is achieved, the system stops the refrigerator compressor.
Today, in everyday life, two.chamber units are much more often used, in which one compressor is used for the entire system. However, there are two.compressor units with each individual “engine” on the refrigerator and freezer chambers. This allows you to turn off a separate unnecessary compressor if necessary and stop working one of the cameras without harm to performance.
How the refrigerator compressor works
To correctly understand how the compressor of the refrigerator works, you need to know that this is exactly the unit that is able to independently develop the cold. Thanks to the processes flowing inside the refrigerator, the cold occurs. the heat obtained from the refrigerant is removed into the surrounding space. The most common substance in this process, which is used, is a freon used in compressor.type refrigerators.
- Freon, falling into the evaporation chamber, takes all the warm air from the refrigerator;
- After the refrigerant enters the compressor and then to the capacitor;
- Moving along the spiral system in the walls of the refrigerator, the freon cools, and takes a liquid state;
- After the cooling process, the refrigerant enters the evaporator, from where, heading into the tube with a large diameter, due to pressure loss, it becomes gaseous. And after everything is repeated.
The principle of operation of a two.chamber refrigerator with one compressor
In a two.chamber refrigerator with one compressor, two evaporators are installed. Although in fact, they are different parts of the same element (see. rice). The first is located. in the freezer, the second. in the usual. Freon, after passing through the filter-dryer, first gets into the first, then the second.
When it gets into the freezer, the refrigerant selects heat from it and heats up. After that, he gets into the main compartment, where he takes the heat from him. Due to the fact that its temperature increased slightly after passing the freezer, in the usual compartment the temperature will not drop below 0 degrees.
With one compressor
In everyday life, devices with one engine are most often operated. The use of such an unit costs the owners cheaper. His work is always connected with the simultaneous cooling of both compartments.
With two compressors
Two.chamber equipment operates simply. at first the working gas mass reduces the temperature in the freezer evaporator to the installed minus. Then the agent goes into the evaporative department of the main camera. When the evaporator reaches the desired minus temperature, the thermostat is turned on, which stops the functioning of the compressor.
Important. In devices with two cameras, you can turn off one department, in the functioning of which the owner does not need.
Комментарии и мнения владельцев 3
These are in fairly modern compressors so much copper.And in the old models which are more than 15 years old and in Soviet copper much more.Typically, their compressor is larger and heavier and copper from 900 to a kilogram.True, I say a 125 mm of 125 mm at once for such a compressor may not be enough.Steel there is much thicker and cut it much harder.Without corner grinder, you can cut such a compressor with a gas-acetylene burner for example with oxygen in metal cutting mode.You can also use the saw for metal, but I say immediately, very long and dreary to saw the compressor, especially the old.So it is better to use a corner grinder.It is desirable that she should calculate for a circle from 180 and more.It is desirable to cut on the side on which there are contact pins for connecting the compressor electric motor relay.So in old models it is easier to pull out the winding of copper.Because from the side of the tubes for the freon or refrigerant, you usually get to the piston itself and then access is difficult to the copper winding.I do not advise you to cut and a copper winding is often much easier to remove without cutting.I say this from personal experience.Then the copper wire itself can be used for other purposes, and not for the surrender itself as scrap metal.True, this is most often easier to do with old compressors who are much more than ten years old.So the choice is for you in this matter.I have analyzed such things many times and have some experience I have.But if your goal is precisely scrap metal, then yes, it’s more likely, and most importantly, it’s more likely just cut everything.