SU1629706A1 - Magnetocalorific refrigerator - Google Patents

Description

(21) 4603003/06

(22) 11/05/88

(46) 02.23.9Bul. (7

(72) V.I. Karagusov and V.L.Afanasyev

(53) 621.57 (088.8)

(56) Patent Cl IA No. 4532770, cl. 62-3, bullet. 1985.

(54) MAGNETIC COLOR REFRIGERATOR

(57) The invention relates to a cryogenic technique and allows to expand the range of operating temperatures and increase the cooling capacity. When the engine 7 is turned on, the rotor (P) S is rotated and the reverse flow of the coolant in the circuit begins with the help of the device 6. At the same time, the working fluid block (BRT) 2 located in the annular groove

JO,

The flux in the zone of the ferromagnetic half P 8 and the magnets 11 and 12 in the field is magnetized and heated, and the BRT 3 in the zone of the diamagnetic half P 8 is demagnetized and cooled. The heat of magnetization of the BRT 2 ogvbdits into the heat sink, and the coolant cooled in the BRT 3 cools the heat sink, realizing the refrigerating capacity of the refrigerator. Upon further rotation of P 8, BRT 2 enters the zone of the diamagnetic half of P 8 and is demagnetized, and BRT 3 goes to the zone of the ferromagnetic half of P 8 and is magnetized, while the coolant is pumped in the opposite direction. The synchronization of the rotation of the flow and pumping of the heating medium is provided by a common drive from the engine 7. 2 Il.

I

05 E

with vj

about o

The invention relates to a cryogenic technique, and more specifically to refrigerators operating on the basis of the magnetic-caloric effect.

The purpose of the invention is to expand the range of operating temperatures and increase the cooling capacity.

Figure 1 shows a schematic of a refrigerator; figure 2 - section aa in figure 1.

The magnetocaloric refrigerator includes a housing 1, blocks 2 and 3 of a porous working fluid, a heat receiver 4, a heat sink 5, a reversing pumping device 6, an electric motor 7, a rotor 8 consisting of two halves: ferromagnetic 9 and diamagnetic 10, permanent magnets 11 and 12. The rotor 8 is fixed on the shaft 13 of the engine 7. The pipelines (arrows B and C) are interconnected.

Magnet ocaloric refrigerator works as follows.

When the shaft 13 is rotated, the engine 7 is driven into motion by the rotor 8 and the device 6 for reversing the flow of coolant. For the initial state, we take the position of the rotor I-I (Fig. 2). The unit 2 of the working fluid is located between the poles of the magnets 11 and 12, that is. magnetized and block 3 demagnetized. Rotor 8 rotates counterclockwise and occupies position II-II. the piston of the reversing propulsion device 6 moves to the right. In this case, the zone a of block 3 is magnetized, the zone a of block 2 is demagnetized. The coolant from the pumping device 6 in the direction of arrow B enters through the heat distributor 5 into the zone a of the unit 2. where it is cooled, the supply to the working fluid is heat. Then the coolant passes through the block of the working fluid, cooling it at the maximum field. In block 3 of the working fluid, the agitator comes from the heat collector 4. As the zone a of block 3 is magnetized, the coolant, passing this zone, heats up and then heats the remaining zones of block 3 with a minimum field

Next, the rotor 8 takes the position of Ill-Ill, the piston of the device 6 reverse pumping continues to move from. In this case, the cooled coolant leaves the block 2 and enters the heat receiver 4, where the cooling capacity is realized. Heated

the coolant exits block 3 and enters the heat exchanger 5, where it transfers heat to the environment.

Then, the rotation direction of the rotor 8 and the movement of the piston of the reversing pumping device 6 change. The coolant in arrow B enters block 3, the heat sink 4, block 2, heat sink 5 and in arrow B into unit 6. The cooled coolant exits block 3 and enters the heat sink 4 where the cooling capacity is realized. The heated coolant leaves unit 2 and enters the heat sink where it transfers heat to the environment. After the rotor 8 reaches position I-I, the direction of rotation of the rotor 8 and the movement of the reverse flow device 6 change, and the cycle repeats.

Blocks 2 and 3 of the working medium are placed between the opposite poles of the permanent magnets 11 and 12 in order to achieve the maximum magnetic field in the working medium. The rotor 8 is made up of two halves: the ferromagnetic 9 closes the magnetic lines of force of the permanent magnets 11 and 12 to obtain the maximum field when the working medium is magnetized, the diamagnetic 10 serves to obtain the minimum field when the working body is demagnetized. The reversing pumping device 6 and the rotor 8 are driven by a solid engine to obtain a rigid relationship between the change in the field and the direction of flow of the coolant.

Claims (1)

Invention Formula A magnetocaloric refrigerator containing a case with blocks of a porous working fluid placed in it in the heat transfer circuit, a heat transfer receiver, heat sink and heat source, and a rotor with permanent magnets installed on it, in order to extend the operating temperature range and increase in cooling capacity, the rotor is made of ferromagnetic and diamagnetic halves with an annular groove in the middle, blocks of a porous working fluid are installed directly Vision in the annular 516297066 The rotor bore, the magnets are made in the magnets facing the blocks of the working form of half-rings and installed on the ferro-body with opposite poles, and the magnetic half of the rotor on both sides of the reversible pumping of the heat sides of the working body blocks, the carrier and the rotor having a common drive. Aa AT FIG. 2