CN103256203B - A kind of air-conditioning refrigerator Linearkompressor - Google Patents

Abstract

The invention discloses a kind of air-conditioning refrigerator Linearkompressor, comprise shell and to be contained in shell and to cross the compressing mechanism that outer casing stand fixes with shell, described compressing mechanism comprises piston and drives the linear electric motor of living and moving along its live axle, described compressing mechanism, by dynamic balancer connected with outer casing, is stated dynamic balancer and is comprised mover; Connect the first elastic member of mover and live axle; And connect the second elastic member that is dynamic and outer casing stand.The present invention reduces the vibration of compressor greatly, and theoretical case vibration output is zero; In addition, dynamic balancer mover of the present invention is connected with the first elastic member, the Placement of elastic member can make dynamic balancer compact structure, easy for installation, and debugging is simple.

Description

An air conditioner refrigerator linear compressor

technical field

The invention relates to refrigeration equipment, in particular to a linear compressor for an air conditioner refrigerator.

Background technique

With the development of social economy and the progress of science and technology, air-conditioning refrigerators have become one of the indispensable household appliances in ordinary families. According to incomplete statistics, the electricity consumption of air-conditioning refrigerators accounts for 20-40% of the whole family, even higher in hot summer, and the excessive consumption of electric energy leads to the aggravation of energy shortage and the emission of more greenhouse gases. Under the theme of the century, the international community has put forward higher requirements for the energy efficiency ratio of air-conditioning refrigerators. The compressor plays a heart-like role in the refrigeration system, and its power consumption accounts for more than 80% of the entire system. Therefore, improving the efficiency of the compressor and improving the operating conditions of the compressor are important ways to reduce energy consumption. Linear compressors are currently a research hotspot, and have the advantages of high efficiency, long life, low vibration, and low noise. The linear compressor is a compressor driven by a linear motor. For the power range of the refrigerator compressor, the performance of the linear compressor is better than that of the piston compressor, and it can remain unchanged in a wide power range; at the same time, the linear compressor is also It can solve the problems of traditional compressors such as complex structure, large volume, large noise and vibration, low overall mechanical efficiency, short life, short stroke of piston, and high frequency of piston. It is precisely because of the advantages of linear compressors in energy saving and consumption reduction that linear compressors have been widely used in the field of air conditioners and refrigerators. Compared with traditional reciprocating piston compressors, their efficiency can be increased by 20% to 30%.

At the same time, people have also put forward higher requirements for the comfort of air-conditioning refrigerators. For example, the requirements for vibration and noise, people hope that the vibration and noise of household air-conditioning refrigerators are small enough during operation, so as to provide us with a quieter and more comfortable working and living environment, thereby improving our quality of life.

At present, the linear compressor used in air-conditioning refrigerators mainly adopts a cylindrical helical spring assembly under the compressor body to achieve the effect of vibration reduction. For example, a Chinese patent with the notification number CN101265895 discloses a linear compressor. It includes a casing, a compressor body, and an elastic member spaced from the bottom of the casing to support the compressor body inside the casing, the compressor body is installed in the casing, and is composed of a cylinder, a It consists of a piston that reciprocates in the cylinder to compress the refrigerant, and a linear motor that drives the piston. But the object of its vibration reduction is the whole compressor body, so the vibration reduction system seems cumbersome and bulky, and the vibration and noise still exist substantially, which reduces people's quality of life. Aiming at the above-mentioned damping problem, the Chinese patent application number 201210289107.3 discloses a linear compressor with a damping structure. The method is to add an accompanying mover and spring to the vertically placed linear compressor mover system. The "spring-mass" system constituted for vibration reduction. Since the object of vibration reduction is only the mover part, the power consumption can be reduced in comparison, and the structure is lighter. But because what adopt still is cylindrical spring to connect, often structure can not be accomplished compact, and whole compressor body still seems relatively heavy and bulky.

Contents of the invention

The invention provides a linear compressor for an air conditioner refrigerator, which has low vibration, low noise and compact and ingenious structure.

A linear compressor for an air-conditioning refrigerator, comprising a housing and a compression mechanism housed in the housing and fixed to the housing through a housing bracket. The compression mechanism includes a piston and a linear motor that drives the piston to move along its drive shaft. The compression mechanism is dynamically The balancer is connected to the casing, and the dynamic balancer includes a mover; a first elastic component connecting the mover and the drive shaft; and a second elastic component connecting the mover and the casing support.

The mover is spliced by two hollow circular platforms, the inner diameters of the two ends of the mover are small, and the inner diameter of the middle is large. The hollow inner cavity of the mover allows the drive shaft connected with the mover to protrude into the inner cavity, which is more conducive to vibration reduction of the piston during movement.

Preferably, the inner side of the first elastic component is connected to the drive shaft of the piston, and the outer side of the first elastic component is connected to the outer side of the mover. The inner side of the second elastic component is connected to the inner side of the mover, and the outer side of the second elastic component is connected to the shell bracket.

In this way, the operating frequency of the dynamic balancer and the piston will remain consistent, and after designing a suitable mover mass and the stiffness of the first elastic part and the second elastic part, the vibration of the compressor will be greatly reduced, and it will be easy to achieve compression The integrated design of the machine and the vibration damping device has a compact and ingenious structure.

More preferably, the inner side of the first elastic member is connected to a connecting rod provided at the end of the drive shaft, and the connecting rod extends into the inner cavity of the mover.

The dynamic balancer uses a connecting rod embedded in the inner cavity of the mover of the dynamic balancer. The inner side of the mover is connected to the second elastic part, and the outer side is connected to the first elastic part. This can make the dynamic balancer compact in structure, easy to install, and easy to debug. Simple.

The first elastic member and the second elastic member are first leaf springs, which may be scroll arm leaf springs, such as concentric scroll arm leaf springs, eccentric scroll arm leaf springs, or linear arm leaf springs.

The diameter of the first elastic component is smaller than that of the second elastic component.

A clamping device is fixed on the outer side of the compression mechanism, and the clamping device is fixed on the shell support. A clamping device is used to fix the compression mechanism to the casing support, so that the vibration of the compression mechanism is reduced during movement.

A second leaf spring is sheathed on the drive shaft. The second leaf spring is mainly used to support the piston, which is beneficial to reduce the friction between the piston and the cylinder. The second leaf spring can be a scroll arm leaf spring, or a linear arm leaf spring.

The outer side of the second leaf spring is fixed on the casing support. Preferably, the outer side of the second leaf spring is fixed on the clamping device.

The outer side of the second elastic component is connected with a fixing ring, and the fixing ring is connected with the shell support. The fixing ring is used to fix the second elastic component more favorably, so that it is favorably supported by the fixing ring during the vibration process to reduce the vibration amplitude. When a clamping device is fixed outside the compression mechanism, the fixing ring can be connected to said clamping device.

In order to reduce the dry friction between the plate layers of the second leaf spring, an inner washer is fixed on the inner side of the second leaf spring, and an outer washer is fixed on the outer side.

The linear motor comprises an outer yoke, an inner yoke, an inner fixed ring of the inner yoke, an outer fixed ring, a coil and a permanent magnet, a permanent magnet bracket fixedly connected with the piston is installed on the drive shaft, and a support The supporting frame of the inner yoke, the inner yoke is set on the supporting frame, and the two ends of the inner yoke are respectively clamped by the inner fixing ring of the inner yoke and the outer fixing ring of the inner yoke fixed on the supporting frame; There is a permanent magnet; the outer yoke is arranged outside the permanent magnet, and a coil is nested in the outer yoke. When the clamping device is fixed on the outer side of the compression mechanism, the outer yoke is fixed by the clamping device.

The inner yoke and the outer yoke are made of silicon steel sheets stacked and wound into a ring.

When the alternating current is applied, the coil will generate an alternating magnetic field in the annular air gap formed by the inner yoke and the outer yoke, so that the permanent magnet is subjected to an alternating axial reciprocating force, and then the permanent magnet is fixedly connected with the piston The permanent magnet bracket drives the piston to do axial reciprocating motion.

The linear motor is a moving magnet linear motor, and a moving coil linear motor or a moving iron linear motor is also applicable to the present invention. The linear motor provides axial reciprocating force for the piston, thereby pushing the piston to do work by compressing the gas in the cylinder.

In the present invention, the inner side refers to the side of a component adjacent to the driving shaft of the piston, and the outer side refers to the side of a component away from the driving shaft of the piston and adjacent to the housing. The component includes a first elastic component, a second elastic component, a mover, and a second leaf spring.

Beneficial effects compared with prior art:

1) The present invention can be applied to air conditioners or refrigerator refrigeration equipment. The present invention can greatly reduce the vibration of the compressor. People provide a more quiet and comfortable working and living environment.

2) The present invention adopts full leaf spring support, which is beneficial to the integrated design of the vibration damping device and the linear compressor, and realizes a compact structure; it is beneficial to ensure the coaxiality between the piston and the dynamic balancer mover, and reduce the distance between the piston and the cylinder. risk of frictional collisions.

3) The dynamic balancer adopts the method that the connecting rod is embedded in the mover of the dynamic balancer and connected with the first elastic part, wherein the outside of the mover of the dynamic balancer is connected with the first elastic part, and the inside of the mover is connected with the second elastic part The structure of the dynamic balancer can be compact, the installation is convenient, and the debugging is simple.

Description of drawings

Fig. 1 is a structural schematic diagram of a linear compressor for an air conditioner refrigerator of the present invention;

Fig. 2 is a schematic plan view of the first elastic member;

3 is a schematic plan view of a second elastic member;

Fig. 4 is the structural representation of dynamic balancer mover;

Among them, 1. Shell; 2. Left fixed ring; 3. Right fixed ring; 4. Second leaf spring; 5. Outer gasket; 6. Permanent magnet bracket; 7. Clamping device; 8. Outer yoke; 9. Coil; 10. Annular air gap; 11. Shell bracket; 12. Air valve assembly; 12a. Intake valve; 12b. Exhaust valve; 13. Compression cavity; 14. Piston; 15. Inner yoke inner fixing ring; 16 1, inner yoke; 17, permanent magnet; 18, inner yoke outer fixing ring; 19, inner washer; 20, drive shaft; 21, connecting rod; 22, mover; 23, first elastic part; 24, nut; 25. The second elastic component.

Detailed ways

The present invention will be described in further detail below in conjunction with specific examples, but it should be understood that the following are only examples and do not limit the scope of the present invention.

Referring to Fig. 1 , a linear compressor for an air conditioner refrigerator includes a casing 1 of the hermetic compressor, a compression mechanism and a dynamic balancer housed in the casing 1 and fixed to the casing 1 through a casing bracket 11, and a device for communicating the compression mechanism with the outside world. Air valve assembly 12. The compression mechanism includes a cylinder, a piston 14 in the cylinder, and a linear motor that drives the piston 14 to move along its drive shaft 20 . The compression mechanism is connected to the casing 1 through a dynamic balancer. The housing bracket 11 is fixed on the housing 1 and forms a closed inner cavity with the housing 1 , and the housing bracket 11 is provided with a clamping device 7 for clamping the compression mechanism.

The linear motor comprises an outer yoke 8, an inner yoke 16, an inner fixed ring 15 of the inner yoke, an outer fixed ring 18 of the inner yoke, a coil 9 and a permanent magnet 17. The magnet bracket 6, the shell bracket 11 is provided with a support frame supporting the inner yoke 16, the inner yoke 16 is sleeved on the support frame, and the two ends of the inner yoke 16 are respectively fixed by the inner yoke inner fixing ring 15 on the support frame. It is clamped with the inner yoke and the outer fixing ring 18; the permanent magnet bracket 6 is covered with a permanent magnet 17; the outer yoke 8 is arranged outside the permanent magnet 17 and fixed by the clamping device 7, and the outer yoke 8 is nested with a coil 9 . Wherein, the inner yoke 16 and the outer yoke 8 are formed by stacking silicon steel sheets and wound into a ring shape. When the alternating current is applied, the coil 9 will generate an alternating magnetic field in the annular air gap 10 formed by the inner yoke 16 and the outer yoke 8, so that the permanent magnet 17 is subjected to an alternating axial reciprocating force, and the piston 14 The permanent magnet bracket 6 and the permanent magnet 17 are coupled together, so the permanent magnet 17 can drive the piston 14 in the cylinder to reciprocate axially, so that it can realize the gas compression and expansion process in the compression chamber 13 . The compression chamber 13 communicates with the outside through the air valve assembly 12, and the air valve assembly 12 includes an intake valve 12a and an exhaust valve 12b. During the inhalation process, low-pressure gas is inhaled by the intake valve 12a; during the exhaust process, high-pressure gas is discharged by the exhaust valve 12b.

The dynamic balancer includes a mover 22 ; a first elastic member 23 connecting the mover 22 and the drive shaft 20 ; and a second elastic member 25 connecting the mover 22 and the shell support 11 . Wherein, the first elastic member 23 and the second elastic member 25 are the first leaf springs, the eccentric scroll arm leaf spring is selected here, and the diameter of the first elastic member 23 is smaller than the second elastic member 25, as shown in Fig. 2 and Fig. 3 Show.

The mover 22 is spliced by two hollow circular platforms. The two ends of the mover 22 have small inner diameters and the middle has a larger inner diameter. The schematic diagram of the mover 22 is shown in FIG. 4 . The inner side of the first elastic member 23 is connected with the connecting rod 21 arranged at the end of the piston 14 drive shaft 20, and is fixed by a nut 24, and the connecting rod 21 stretches into the inner chamber of the mover 22; the outer side of the first elastic member 23 is connected with the The outer side of the mover 22 is connected; the inner side of the second elastic member 25 is connected with the inner side of the mover 22; 25, so define the fixed ring connected with the second elastic member 25 at the front end of the connecting rod 21 as the left fixed ring 2, and the fixed ring connected with the second elastic member 25 at the rear end of the connecting rod 21 as the right fixed ring The ring 3, the left fixing ring 2 and the right fixing ring 3 are fixed on the clamping device 7.

The drive shaft 20 is sheathed with a second leaf spring 4 , which is a scroll arm leaf spring or a linear arm leaf spring. In order to reduce the dry friction between the second leaf spring 4, the inner washer 20 is fixed on the inner side of the second leaf spring 4, and the outer washer 5 is fixed on the outer side. Tighten device 7.

Claims (7)

1. an air-conditioning refrigerator Linearkompressor, comprise shell and be contained in the compressing mechanism fixed in shell and by outer casing stand and shell, described compressing mechanism comprises the linear electric motor that piston and driven plunger are moved along its live axle, it is characterized in that, described compressing mechanism is by dynamic balancer connected with outer casing, and described dynamic balancer comprises mover; Connect the first elastic member of mover and live axle; And connect the second elastic member of mover and outer casing stand;

Described mover is spliced by the round platform of two inner chamber hollows, and described mover two ends internal diameter is little, and middle internal diameter is large;

The described inner side of the first elastic member is connected with the live axle of piston, and the outside of the first elastic member is connected with the outside of described mover;

The described inner side of the second elastic member is connected with the inner side of mover, and the outside of the second elastic member is connected with outer casing stand.

2. air-conditioning refrigerator Linearkompressor according to claim 1, is characterized in that, the inner side of described first elastic member is connected with the connecting rod being arranged on driveshaft end, and described connecting rod stretches in the inner chamber of described mover.

3. air-conditioning refrigerator Linearkompressor according to claim 1, is characterized in that, the outside of described second elastic member is connected and fixed ring, this retaining ring connected with outer casing support.

4. air-conditioning refrigerator Linearkompressor according to claim 1, is characterized in that, described first elastic member, the second elastic member are the first leaf spring.

5. air-conditioning refrigerator Linearkompressor according to claim 1, is characterized in that, described live axle is arranged with the second leaf spring.

6. air-conditioning refrigerator Linearkompressor according to claim 5, is characterized in that, the inner side of described second leaf spring is fixed with inner washer, and outside is fixed with outer washer.

7. air-conditioning refrigerator Linearkompressor according to claim 1, it is characterized in that, described linear electric motor comprise outer yoke, interior yoke, interior yoke internal fixtion ring, interior yoke extenal fixation ring, coil and permanent magnet, live axle is installed on the permanent magnet support be fixedly connected with piston, the supporting frame of yoke in outer casing stand is provided with and supports, interior yoke is enclosed within supporting frame, and interior yoke two ends clamp by being fixed on yoke internal fixtion ring and interior yoke extenal fixation ring on supporting frame respectively; On permanent magnet support, cover has permanent magnet; Outer yoke is arranged on outside permanent magnet, is nested with coil in outer yoke.