RU2664486C1 - Valve motor-compressor mechanism - Google Patents

Abstract

FIELD: refrigerating equipment.SUBSTANCE: invention relates to motor-compressors for use in refrigeration and air-conditioning. Valve mechanism for a motor-compressor contains a monolithic valve plate without saddles with suction and injection holes of cylindrical or non-cylindrical shape. It also contains integral plates of suction and discharge valves with self-acting elastic lobes of suction and discharge valves and a plate of suction and discharge saddles. Suction and discharge saddles have windows of a depth equal to the thickness of the plates of the suction and discharge saddles, form identical to the form of the self-acting suction and discharge valves. Windows dimensions along the entire inner contour are larger than the dimensions of the suction external contour and discharge valves by at least 0.5 mm. Inside the above-mentioned windows there are sealing saddles of a suction and discharge saddle, They are made in the form of closed belts of cylindrical or non-cylindrical shape. Suction and discharge saddles are connected to the suction and discharge suction plate windows by means of elastic thin partitions, width and thickness of which are identical to the width and thickness of the suction and discharge saddle bands. Material of the suction and discharge saddle plates, its thickness and manufacturing method are identical to the material, thickness and method of manufacturing self-acting suction and discharge valves from the Swedish tape SANDVIC-20C by stamping.EFFECT: noise intensity and energy consumption are reduced.3 cl, 12 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a motor compressor for refrigeration and air conditioning, and more particularly to a valve mechanism with greater performance and less noise and vibration, as well as to a method for its manufacture.

BACKGROUND OF THE INVENTION

The motor compressor in refrigeration and air conditioning is a device for creating a pressure difference of the working substance on the suction side and on the discharge side. The motor-compressor are divided into rotary, scroll, screw and piston. A rotary motor compressor creates a pressure difference of the working medium by changing the volume of the working cavity due to plates mounted on a rotating rotor. The rotor axis is offset relative to the axis of the compressor cylinder. The spiral-type motor compressor creates a pressure difference of the working medium by changing the volume of the working cavity due to the rotation of the movable spiral fixed to the rotating rotor relative to the stationary spiral. A screw-type motor compressor creates a pressure difference of the working medium by changing the volume of the working cavity due to the rotation of the screw mounted on a rotating rotor. A piston-type motor compressor creates a pressure difference of the working medium by changing the volume of the working cavity due to the piston performing a rectilinear reciprocating motion. The rotation of the compressor shaft in the reciprocating motion of the piston is carried out by a crank or crank link mechanism.

Disclosure of invention

Technical problem

Known hermetic motor compressors of the SKO type of the joint-stock company ATLANT of the Baranavichy Engineering Plant (US patent 4573880 dated 03/04/86), P12TN, MP 14 for household refrigerators and freezers of the open joint-stock company Kholodmash, Yaroslavl, manufactured under license from the company Zanussi ", - p. 62." Refrigerators for domestic use ", Moscow Technological Institute. Moscow, 1986, author AI Naberezhnye, as well as a Danfoss compressor with a crank mechanism of the SC18R 104G series and the NLE9F series - page 153. Household compression refrigerators. Weinberg B.S., Vine L.N. M .: "Food industry", 1974, as well as a motor-compressor according to patent RU No. 2148192 with a priority of July 26, 1999 and a motor-compressor according to patent RU No. 2238427 with a priority of February 25, 2003. The closest in essence to the present invention is a motor-compressor, in particular hermetic, containing a casing, a motor and a compressor housed therein, which includes a cylinder head, a cylinder, a transmission mechanism and a piston, which, when moving it, sucks, compresses and pumps the working fluid by means of a suction-discharge device, flax in the form of self-acting suction and discharge valves, a valve plate without seats, and each of the suction and discharge seats, at least two, is made on an elastic thin plate in the form of closed thin sealing belts of cylindrical or non-cylindrical shape, which on one side are tightly overlapped by the above self-acting suction and discharge valves, on the other hand, are tightly mated along the discharge and suction openings of the indicated valve plate without seats (RU 2148192 C1, 04/27/2000).

 The execution of the suction and discharge seats on elastic thin plates mating with the suction and discharge valves over their entire surface, including the surfaces of the suction and discharge seats and the presence of an oil film on the surfaces of the seats and valves, leads to increased noise when closing the suction and discharge valves and increased energy consumption during their untimely opening due to sticking of the surfaces of the suction and discharge valves to the surfaces of the plates of the seats of the suction and discharge.

Technical solution

Therefore, the present invention relates to a valve mechanism for a motor compressor, which substantially eliminates one or more problems due to limitations and disadvantages of the prior art.

The present invention is the creation of a valve mechanism for a motor compressor, with a decrease in the area of the surfaces of the collision and adhesion of the suction and discharge valves with the surfaces of the plates of the seats of the suction and discharge with a significant reduction in noise and energy consumption. Additional advantages, objectives and features of the present invention will be partially discussed in the following description and partially understood by those who are familiar with this technical field, after studying the following or can be studied through the practice of this invention. The objectives and other advantages of this invention can be realized and achieved due to this design, given in the description and its claims, as well as in the accompanying drawings.

This problem is solved and the technical result is achieved by the fact that in a motor compressor containing a casing, an electric motor and a compressor are arranged therein, which includes a cylinder head, a cylinder, a transmission mechanism and a piston, which, when moving it, sucks, compresses and pumps the working fluid by means of a suction - a pressure device made in the form of self-acting suction and discharge valves, a monolithic valve plate without seats, and the elastic plates of the suction and discharge seats contain bent thin sealing belts of cylindrical or non-cylindrical shape, which, on the one hand, mate with surfaces of the aforementioned self-acting suction and discharge valves, and on the other hand, tightly mate with their surfaces on the suction and discharge holes of the indicated valve plate, the elastic plates of the suction and discharge seats have windows identical in shape to the form of self-acting suction and discharge valves, and the dimensions of the windows along the entire internal circuit are larger than the dimensions of the external circuit of the valve suction and discharge panels are not less than 0.5 mm, and thin sealing belts of the suction and discharge seats with suction and discharge holes of cylindrical or non-cylindrical shape are located inside the above windows and are connected with elastic thin jumpers, the width and thickness of which are identical to the width and the thickness of the sealing belts of the suction and discharge saddles, and the material of the elastic plates of the suction and discharge saddles, their thickness and manufacturing method are identical to the material, thickness and manufacturing method of self-made of existing suction and discharge valves from the Swedish tape SANDVIC-20C by stamping.

The location of the thin sealing belts in the windows on the elastic jumpers of the suction and discharge seats, the dimensions of which are larger than the dimensions of the self-acting pressure and suction valves, allows the suction and discharge valves to strike when they close only the thin sealing belts and the elastic thin suction and discharge jumpers, which leads to a decrease noise by 4-5 dBA, vibration reduction by 1.5-2 times, and also to prevent sticking of the suction and discharge valves when they open with a decrease in energy consumption for their opening ytie 5-10%.

The tight fit of the surfaces of the suction and discharge valves only to the thin sealing belts of the suction and discharge seats can reduce leakage by 25-30% and increase compressor productivity by 5-8%.

The shock absorption and reduction of leaks are also due to the fact that the surface of the thin belts of a cylindrical or non-cylindrical shape of the suction and discharge seats and the surfaces of the suction and discharge valves are coated with a vibration-sealing thin oil film.

You must understand that both the specified General description and the following detailed description of the present invention are given as examples and explanations and are intended to provide further explanation of the present invention claimed in the claims.

A brief description of the drawings.

The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate an embodiment (s) of the present invention and together with the description serve to explain the principle of the present invention. In the drawings:

FIG. 1 is an exploded perspective view of a motor compressor in accordance with a preferred embodiment of the present invention;

FIG. 2 is a sectional view of a motor compressor and a top view of the compressor motor of FIG. 1 (without cover);

FIG. 3 is an exploded perspective view of a valve mechanism for a motor compressor in FIG. 1, in accordance with a first preferred embodiment of the present invention;

FIG. 4 is a sectional view of the valve mechanism during suction of FIG. 1 and FIG. 3;

FIG. 5 is a sectional view of the valve mechanism during the injection process of FIG. 1 and FIG. 3;

FIG. 6 is an exploded perspective view of a valve mechanism in accordance with a second preferred embodiment of the present invention and a top view of a discharge seat plate in FIG. 6 is a plan view of a suction saddle plate.

FIG. 7 is an exploded perspective view of a valve mechanism in accordance with a third preferred embodiment of the present invention;

FIG. 8 is an exploded perspective view of a valve mechanism in accordance with a fourth preferred embodiment of the present invention;

FIG. 9 is an exploded perspective view of a valve mechanism in accordance with a fifth preferred embodiment of the present invention;

FIG. 10 is an exploded perspective view of a valve mechanism in accordance with a sixth preferred embodiment of the present invention and a top view of a discharge seat plate in FIG. 10;

FIG. 11 is an exploded perspective view of a valve mechanism in accordance with a seventh preferred embodiment of the present invention and a top view of the suction seat plate in FIG. eleven;

FIG. 12 is an exploded perspective view of a valve mechanism in accordance with an eighth preferred embodiment of the present invention and a top view of a discharge seat plate in FIG. 12.

BEST MODE FOR CARRYING OUT THE INVENTION

Reference will be made in detail to preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers will be used in the drawings to refer to the same or similar elements.

FIG. 1 is an exploded perspective view of a motor compressor in accordance with a preferred embodiment of the present invention; FIG. 2 is a sectional view of the motor compressor of FIG. 1 is a plan view of the compressor motor of FIG. 1 (without cover).

The motor-compressor includes an electric motor, which contains a stator 3 with the working and starting windings 3a, which is firmly mated to the compressor housing 6 by means of bolts 7, the rotor 4, the crankshaft 5, on which the rotor 4 is pressed. The compressor consists of a housing 6 and a removable cylinder 13, in which the piston 12 is placed, mating with the crank 9 of the crankshaft 5 by means of the rocker stone 10 and the link 11, the crankshaft 5 being mated to the sliding bearing 6a of the compressor housing 6. The cylinder 13 and the housing 6 are interfaced by bolts 31. The cylinder 13 is equipped with a suction-discharge device 32. The motor-compressor and the suction-discharge device are located in the casing of the compressor 1 on the springs 8. The casing of the compressor 1 and the cover of the casing 2 are sealed, as a rule, by the method welding.

FIG. 3 is an exploded perspective view of a valve mechanism for a motor compressor in FIG. 1 in accordance with a first preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with a suction hole 17c and a discharge hole 17b of a cylindrical and non-cylindrical shape, a whole plate of the suction valve 15 with a self-acting elastic lobe of the suction valve 15a, an elastic plate of the suction saddle 16 containing a window 16e with a depth equal to the thickness of the plate of the suction saddle 16, in which there is a thin sealing closed belt 16g of a cylindrical or non-cylindrical shape we with elastic thin jumpers 16d and a suction hole 16c of cylindrical and non-cylindrical shape. The elastic plate of the suction seat 16 mates tightly with the valve plate 17 through a suction hole 17c of a cylindrical or non-cylindrical shape, with its thin closed sealing girdle 16g with a hole 16b of a cylindrical or non-cylindrical shape, the thin sealing girdle 16g on the other hand tightly mating with the surface of a self-acting suction valve 15a. The suction-discharge device also includes a whole elastic plate of the pressure seat 18 containing a window 18e with a depth equal to the thickness of the plate of the pressure seat 18, in which there is a thin sealing closed girdle 18g of cylindrical or non-cylindrical shape with elastic thin jumpers 18d and a discharge hole 18b of cylindrical or non-cylindrical shape , the plate of the discharge valve 19 with a self-acting elastic lobe discharge valve 19a.

The suction-discharge device is tightly mated through the sealing paranitic gasket 21 with a silencer 22, which in turn is mated to the end surface 13a of the cylinder 13 by means of bolts 23 located in the holes 13z-22z.

FIG. 4 is a sectional view of the valve mechanism during suction of FIG. 1 and FIG. 3 and FIG. 5 is a sectional view of the valve mechanism during the injection process of FIG. 1 and FIG. 3.

The proposed hermetic compressor contains significant structural features of the suction-discharge device and works as follows. As shown in FIG. 4, the rotational movement of the rotor 4 is converted into reciprocating movement of the piston 12 in the cylinder 13 through a crank-link mechanism including a crank neck 9 of the crankshaft 5, a rocker 10 and a link 11, mating with the piston 12. FIG. 4, piston 12 is moved from top dead center (V.M.T.) to bottom dead center (N.M.T.). When the piston 12 is moved to N.M.T, the self-acting suction valve 15a is open, and the cylinder 13 is filled with a working fluid from the suction silencer 27 and its tip 27b which fits tightly into the suction hole 17c of the valve plate 17, forming a suction chamber 25. Suction silencer 27 and its tip 27c are made of a heat-insulating material, for example plastic, which minimizes the heating of the suction vapors of the working fluid. The path and direction of the suction vapors of the working fluid (freon) is shown by arrows 28. In this case, the self-acting pressure valve 19a is under the influence of the high pressure of the working medium of the pressure chamber 24 and fits snugly against the surface of the closed thin sealing strip 18g of the elastic plate of the pressure seat 18, blocking the pressure opening 17b valve plate 17. Since the sealing thin closed girdle 18g, the elastic plate of the discharge seat 18 is located inside the window 18e, the inner contour of which is larger around the perimeter at the external contour of the self-acting pressure valve 19a, their conjugation occurs exclusively on the surface of the thin sealing belt 18g of the elastic plate of the pressure seat 18, thereby sticking between them is minimized, which leads to the timely opening of the self-acting pressure valve 19a without delay. The presence of elastic thin jumpers 18d of the thin sealing strip 18g allows it to fit snugly along the discharge opening 17b of the valve plate 17, minimizing leakage.

When the piston reaches 12 N.M.T. the self-acting suction valve 15a closes and at a high speed hits the surface of the thin sealing strip 16g of the elastic plate of the suction seat 16, which generates compressor noise. Due to the fact that the closed sealing belts 16g of the elastic plate of the suction saddle 16 are located in the window 16e and have thin elastic jumpers 16d, the impact of the self-acting suction valve 15a when it is closed does not occur on its entire surface, but exclusively on the surface of the thin sealing strip 16g, which reduces sound power level at 4-5 dBA. Impact damping and a decrease in sound power level also result in the presence of an oil film on the surface of the self-acting suction valve 15a and on the surface of the thin sealing belt 16g of the elastic plate of the suction seat 16.

When the piston moves 12 to V.M.T. there is a compression and increase in the pressure of the working fluid in the cylinder 13. When the compression pressure in the cylinder 13 is equal to the pressure in the pressure chamber 24, the self-acting pressure valve 19a opens, the movement of which is normalized by the lift stop 20, and the compressed working fluid through the pressure hole 17b of the valve plate 17 pushed into the discharge chamber 24. When the piston 12 reaches V.M.T. FIG. 5, the self-acting pressure valve 19a is closed and since the sealing thin belt 18g of the elastic plate of the pressure seat 18 is located in the window 18e, whose inner contour is larger than the external contour of the self-acting pressure valve 19a, the impact does not occur on its entire surface, but only on the surface of the thin the sealing strip 18g of the elastic plate of the pressure seat 18 with a thickness of 0.152-0.203 mm, which leads to shock damping and poor transmission to the valve plate 17. This reduces the sound power level and by 4-5 dBA, and the vibration level on the casing of the compressor 1 to reduce 2-2.5 times. The presence of the piston 12 protrusion 12b, which in V.M.T. located in the discharge openings 15b-18b, can significantly reduce dead volume on the discharge openings of the valve mechanism and increase compressor productivity. The presence on the piston end of the recess 12a, the depth and width of which corresponds to the thickness and width of the self-acting suction valve 15a and the elastic plate of the suction seat 16, can also reduce dead volume on the suction side and increase compressor performance when moving the piston to N.M.T., the above processes are repeated.

FIG. 6 is an exploded perspective view of a valve mechanism in accordance with a second preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with two non-cylindrical suction holes 17c and a cylindrical discharge hole 17b, removable plates of the suction 15 and the discharge valve 19 parallel to each other, with self-acting elastic the petals of the suction valves 15a and discharge 19a, and the removable plates of the seats of the suction 16 and discharge 18, also located parallel to each other. The plates of the suction and discharge seats 18 have windows 16e and 18e with a depth equal to the thickness of the plates of the suction and discharge seats 16 and 18, identical in shape to the forms of the self-acting solenoid valves 15a and discharge 19a, and the dimensions of the windows 16e and 18e over the entire inner circuit are larger than the dimensions of the external circuit suction valves 15a and discharge 19a, sealing belts of the suction seat 16g and discharge 18g, made in the form of closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction holes I and discharge), and many (at least two) elastic thin jumpers, the width and thickness of which are identical to the width and thickness of the belts 16g and 18g of the seats of the suction 16 and of the discharge 18. The plates of the valves of the suction 15 and discharge 19, as well as the lift limiter of the discharge valve 20 , and the plates of the seats of the suction 16 and discharge 18 are mated with the valve plate 17 by rivets through the holes 15i-20i.

FIG. 7 is an exploded perspective view of a valve mechanism in accordance with a third preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with one non-cylindrical suction hole 17c and one cylindrical discharge hole 17b, removable plates of the suction 15 and the discharge valve 19, perpendicular to each other, with self-acting elastic petals of the suction valves 15a and discharge 19a, and removable plates of the seats of the suction 16 and discharge 18, also located perpendicular to each other. The plates of the suction and discharge seats 18 have windows 16e and 18e with a depth equal to the thickness of the plates of the suction and discharge seats 16 and 18, identical in shape to the forms of the self-acting solenoid valves 15a and discharge 19a, and the dimensions of the windows 16e and 18e over the entire inner circuit are larger than the dimensions of the external circuit suction valves 15a and discharge 19a, sealing belts of the suction seat 16g and discharge 18g, made in the form of closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction holes I and discharge), and many (at least two) elastic thin jumpers, the width and thickness of which are identical to the width and thickness of the belts 16g and 18g of the seats of the suction 16 and the discharge 18.

The plates of the suction valve 15 and the suction seat 16 are mated to the valve plate 17 by rivets in the openings 15k-17k. The plates of the discharge valve 19, as well as the lift limiter of the discharge valve 20, and the plates of the pressure seat 18 are mated to the valve plate 17 by rivets in the openings 17i-20i. The paronite gaskets 14 and 21 on the suction and discharge side are mated to the valve plate 17 by means of bolts through the holes 14z, 17z and 21z.

FIG. 8 is an exploded perspective view of a valve mechanism in accordance with a fourth preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with two cylindrical-shaped suction openings 17c and two cylindrical-shaped discharge openings 17b, removable valves of the suction 15 and the discharge 19 of the valves parallel to each other, with self-acting elastic petals suction valves 15a and discharge 19a, and removable plates of the seats of the suction 16 and discharge 18, also parallel to each other . The plates of the suction and discharge seats 18 have windows 16e and 18e with a depth equal to the thickness of the plates of the suction and discharge seats 16 and 18, identical in shape to the forms of the self-acting solenoid valves 15a and discharge 19a, and the dimensions of the windows 16e and 18e over the entire inner circuit are larger than the dimensions of the external circuit suction valves 15a and discharge 19a, sealing belts of the suction seat 16g and discharge 18g, made in the form of closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction holes I and discharge), and many (at least two) elastic thin jumpers, the width and thickness of which are identical to the width and thickness of the belts 16g and 18g of the seats of the suction 16 and discharge 18. The plates of the discharge valve 19, as well as the lift limiter of the discharge valve 20, and the plate discharge seats 18 are made in a horseshoe-shaped form.

The plates of the suction valve 15 and the suction seat 16 are mated to the valve plate 17 by rivets in the openings 15k-17k. The plates of the discharge valve 19, as well as the lift limiter of the discharge valve 20, and the plates of the pressure seat 18 are mated to the valve plate 17 by rivets in the openings 17i-20i. The paronite gaskets 14 and 21 on the suction and discharge side are mated to the valve plate 17 by means of bolts through the holes 14z, 17z and 21z.

FIG. 9 is an exploded perspective view of a valve mechanism in accordance with a fifth preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with one suction hole 17c of a cylindrical shape and one discharge hole 17b of a cylindrical shape, removable plates of the suction 15 and discharge 19 of the valves, with self-acting elastic petals of the suction valves 15a and discharge 19a and the removable plates of the seats of the suction 16 and discharge 18. The plates of the seats of the suction 16 and discharge 18 have windows 16e and 18e with a depth equal to the thickness of the plates of the seats of the suction 16 and discharge 18, identical in shape to the form of self-acting suction 15a and discharge 19a valves, and the dimensions of the windows 16e and 18e along the entire inner circuit are larger than the sizes of the outer contour of the suction valves 15a and discharge 19a, the sealing belts of the suction seat 16g and 18g discharge, made in in the form of closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction and discharge holes), and many (at least two) elastic thin jumpers, the width and thickness of which are identical to the widths and the thickness of 16g and 18g saddles suction belts 16 and discharge valve 18. The discharge plates 19 and lift the limiter 20 and the discharge valve plate discharge saddles 18 are in the form of a horseshoe.

The paronite gaskets 14 and 21 on the suction and discharge side are mated to the valve plate 17 by means of bolts through the holes 14z, 17z and 21z.

FIG. 10 is an exploded perspective view of a valve mechanism in accordance with a sixth preferred embodiment of the present invention.

As shown in the above drawings, the suction-discharge device includes a monolithic valve plate 17 without seats with one suction hole 17c of a cylindrical shape and one discharge hole 17b of a cylindrical shape, removable plates of the suction 15 and discharge 19 of the valves, with self-acting elastic petals of the suction valves 15a and discharge 19a and removable plates of the suction and discharge seats 16 and 18. The plates of the suction and discharge seats 16 have windows 16e and 18e with a depth equal to the thickness of the plates of the suction saddles 16 and discharge 18, identical in shape to the shape of the self-acting suction 15a and discharge 19a valves, and the dimensions of the windows 16e and 18e throughout the inner circuit are larger than the dimensions of the outer contour of the suction valves 15a and discharge 19a, the sealing belts of the suction seat 16g and 18g discharge, made in the form closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction and discharge holes), and many (at least two) elastic thin jumpers, the width and thickness of which are identical to the width and the thickness of the belts 16g and 18g of the seats of the suction 16 and discharge 18. The plates of the discharge valve 19, as well as the lift limiter of the discharge valve 20, and the plates of the pressure seat 18 are made in a horseshoe-shaped form.

The plates of the suction valve 15 and the suction seat 16, as well as the paronite gasket on the suction and discharge sides, are mated to the valve plate 17 by means of bolts through the holes 14z-17z.

FIG. 11 is an exploded perspective view of a suction valve mechanism in accordance with a seventh preferred embodiment of the present invention.

The suction device of the valve mechanism includes a piston 12, on the end surface of which there are many (in this case 3) suction openings 12b of a cylindrical shape, as well as a whole plate of the suction valve 15 with a self-acting elastic lobe of the suction valve 15a, and a whole plate of the suction seat 16. The seat plate of the suction 16 has windows 16e with a depth equal to the thickness of the plate of the suction saddle 16, in a form identical to the shape of the self-acting suction valve 15a, and the dimensions of the window 16e throughout the inner contour ru larger than the dimensions of the external contour of the suction valve 15a, the sealing belts of the suction saddle 16g, made in the form of closed belts of cylindrical or non-cylindrical shape (in shape and number identical to the shape of the suction and discharge holes), and many (at least two) elastic thin jumpers, width and whose thickness is identical to the width and thickness of the belts 16 g of the suction seat 16.

The plates of the suction valve 15 and the plate of the suction seat 16 mate with the end surface of the piston by rivet 26 through the holes 12i, 15i and 16i.

FIG. 12 is an exploded perspective view of a valve mechanism in accordance with an eighth preferred embodiment of the present invention.

The discharge device of the valve mechanism comprises a compressor housing 6 with a discharge hole 18b of a cylindrical shape in which the piston 12 is located. The discharge valve 19 is interfaced with the sealing belt 18g of the discharge seat 18.

The pressure seat plate 18, as in the first embodiment, has a window 18e with a depth equal to the thickness of the pressure seat plate, identical in shape to the self-acting suction and pressure valves 19, the sealing girdle 18g of the suction and discharge seats, made in the form of closed cylindrical or non-cylindrical in shape, and a plurality of (at least two) elastic thin jumpers, the width and thickness of which are identical to the width and thickness of the seat belt of the suction and discharge. The discharge valve plate is mated to the valve plate by rivets in the openings 6i and 18i.

Industrial applicability.

To date, samples of the suction-discharge device for hermetic refrigerant compressors have been manufactured (Figs. 1-11).

The plate of the discharge valve 19 with a self-acting elastic flap, the horseshoe-shaped discharge valve 19a is serially made from polished steel tape of the Swedish type Sandvic-20C with a thickness of 0.203 + 0.008 mm. stamping (punching) followed by winding in a rotating drum, filled with, for example, cherry pits, which allows you to remove burrs and stress concentrates. A thin monolithic valve plate 17 without suction and discharge seats with a thickness of 0.8 + 0.008 mm, for example, when the compressor is running on isobutane, the R600a is also made of polished steel tape of the Sandvic-20C type by stamping (punching) followed by winding.

The elastic plate of discharge seat 18 is made of polished steel tape with a thickness of 0.203 + 0.008 mm of the Sandvic-20C type by stamping (punching) followed by winding. The elastic plate of the discharge seat 18 contains a window 18e, the inner contour of which is identical in shape to the self-acting pressure valve 19a, but the dimensions of the internal contour of the window 18e are 0.8 ± 0.1 mm larger than the dimensions of the external contour of the self-acting pressure valve 19a, and it is located in the window 18e a thin sealing girdle of 18 g on elastic bridges 18d, the width of which is not more than 0.4 + 0.05 mm. The self-acting pressure valve 19a, the stopper 20 and the elastic plate of the pressure seat 18 with their holes 18i, 19i, 20i are centered on the holes 17i of the valve plate 17 and are firmly mated with it with rivets.

The elastic plate of the suction seat 16 and the plate of the suction valve 15 with a self-acting elastic lobe of the suction valve 15a with a thickness of 0.153 + 0.008 mm are made of steel valve tape of the Sandvic-20C type by stamping (punching) followed by winding. Moreover, the elastic plate of the suction saddle 16 contains a window 16e, in which there is a thin sealing girdle of 16 g on elastic jumpers 16e, the width of which is not more than 0.4 + 0.05 mm. The total thickness of the valve plate 17 with elastic seats of suction 16 and discharge 18 is not more than 1,156 + 0,008 mm, which reduces the dead volume in the injection holes 2 ÷ 3 times. The self-acting suction valve 15a and the elastic plate of the suction seat 16 with their holes 15i, 16i, are centered on the holes 17i of the valve plate 17 and are firmly mated with it with rivets.

The cylinder head 22, the paronite gaskets 14 and 21 and the valve plate 17 are centered on the openings 13z-22z and are firmly mated with bolts 23 to the cylinder 13.

Such a design of the suction-discharge device can significantly reduce dead volume, eliminate sticking and delay in opening the suction and discharge valves, significantly reduce the shock load of the suction and discharge valves and transfer it to the compressor casing with a decrease in sound power level by 4 ÷ 5 dBA, and increase cooling capacity by 16 ÷ 19% and reduce power consumption by 6 ÷ 8%.

Claims (3)

1. A motor compressor, in particular a hermetic one, comprising a casing, an electric motor and a compressor located therein, which includes a cylinder head, a cylinder, a transmission mechanism and a piston, which, when moving, carry out the suction, compression and forcing of the working fluid by means of a suction-discharge device made in the form of self-acting suction and discharge valves, a monolithic valve plate without seats, and the elastic plates of the suction and discharge seats contain closed thin sealing belts cylindrically or non-cylindrical in shape, which, on the one hand, mate with the surfaces of the aforementioned self-acting suction and discharge valves, and on the other hand tightly mate with their surfaces at the suction and discharge openings of said valve plate, characterized in that the elastic plates of the suction and discharge seats have windows identical to the shape of self-acting suction and discharge valves, and the dimensions of the windows along the entire internal circuit are larger than the dimensions of the external circuit of the suction and discharge valves not less than 0.5 mm, moreover, thin sealing belts of the suction and discharge seats with suction and discharge holes of cylindrical or non-cylindrical shape are located inside the above windows and are connected to them by elastic thin jumpers, the width and thickness of which are identical to the width and thickness of the sealing belts suction and discharge seats, and the material of the elastic plates of the suction and discharge seats, their thickness and manufacturing method are identical to the material, thickness and manufacturing method of self-acting valves sia and injection from the Swedish tape SANDVIC-20C by stamping. 2. The compressor according to claim 1, characterized in that at the end of the piston there is a protrusion of a cylindrical or non-cylindrical shape, which is located at the top dead center in the discharge holes of the suction-discharge device. 3. The compressor according to claim 2, characterized in that a recess is located at the end of the piston, the height and width of which corresponds to the height and width of the seat plates and the suction valve.

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