WO-2026095120-A1 - LINEAR COMPRESSOR

WO2026095120A1WO 2026095120 A1WO2026095120 A1WO 2026095120A1WO-2026095120-A1

Abstract

An embodiment of the present invention may comprise: a shell; a first support device which supports, between the shell and a main body in the shell, a first side of the main body in the axial direction; and a second support device which supports, between the shell and the main body in the shell, a second side of the main body in the axial direction. The main body comprises: a rear cover connected to the first support device; a frame supported by the second support device; a cylinder which is supported in the frame and into which a piston reciprocating in the axial direction is inserted; a stator which is fixed to the frame and has a part surrounding the cylinder; and a resonant spring placed between the stator and the rear cover and comprising elements of which the number is less than 12.

Inventors

KIM, JUNGHAE
BAE, Sangeun
ROH, CHULGI

Assignees

엘지전자 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (10)

Shell; A first support device that supports the first axial side of the main body inside the shell between the shell and the main body; and A second support device is included that supports the axial second side of the main body inside the shell between the shell and the main body, and The above main body is, A cover connected to the first support device above; A frame supported by the second support device above; A cylinder supported inside the above frame and into which a piston that reciprocates in the axial direction is inserted; A supporter connected to the rear side of the above piston; A stator fixed to the above frame and having a portion surrounding the cylinder; and It includes a resonant spring comprising fewer than 12 elements placed between the stator and the cover, and The above supporter is, A base connected to the above piston; An extension connecting the above-mentioned resonant spring and base; and A linear compressor including reinforcing ribs connecting the above extension and the above base.
In Article 1, The first support device comprises: a support bracket communicating with a suction pipe through which refrigerant is sucked; and a support spring coupled to the support bracket and supporting the cover. The above second support device is a linear compressor comprising a discharge cover assembly that is coupled to the shell, includes at least two discharge covers, and is connected to the frame.
In Article 1, The above resonant spring includes a first resonant spring and a second resonant spring spaced apart in the axial direction, and the elements of the first resonant spring and the elements of the second resonant spring are aligned in the axial direction and have the same extension axis, forming a linear compressor
In Paragraph 3, One of the first resonant spring and the second resonant spring is a linear compressor having equal spacing in the circumferential direction.
In Paragraph 3, The first resonant spring and the second resonant spring each have three resonant spring elements, forming a linear compressor.
In Article 1, The above resonant spring is, At least two first resonant springs supported between the supporter and the stator; and A linear compressor comprising at least two second resonant springs supported between the supporter and the cover.
In Article 1, The above supporter is, A linear compressor comprising a resonance spring mounting portion on which the first resonance spring and the second resonance spring are mounted.
In Article 7, The above reinforcing rib is, The above reinforcing rib is provided at the circumferential end of the above extension. The extension direction of any one of the above reinforcing ribs does not pass through the central axis of the piston. The above reinforcing rib includes a first reinforcing rib and a second reinforcing rib, and the two lines extending radially from the first and second reinforcing ribs do not meet in the internal region of the base, and The above reinforcing rib includes a first reinforcing rib and a second reinforcing rib, and the place where two lines extending radially from the first and second reinforcing ribs meet the base has a predetermined gap (W). A linear compressor satisfying at least one of the following conditions.
A cover supported on the first side; A frame supported on the second side; A cylinder into which a piston that reciprocates in the axial direction is inserted, supported inside the above frame; A supporter connected to the rear side of the above piston; A stator fixed to the above frame and having a portion surrounding the cylinder; and It includes a resonant spring placed between the stator and the cover, and When the ear alignment direction of the above resonant spring is defined as the 6 o'clock direction relative to the clock, The one inside the 6:30 to 8:00 direction, and The one inside in the 6:30 to 7:30 direction, A linear compressor satisfying at least one of the following.
In Article 9, All individual elements of the above-mentioned resonant spring are arranged at equal intervals in the circumferential direction in a linear compressor.

Description

Linear compressor The present invention relates to a linear compressor. In a reciprocating compressor, a compression space for compressing the working gas is formed between the piston and the cylinder, and the piston compresses the refrigerant introduced into the compression space as it moves in a straight line back and forth inside the cylinder. Recently, among the aforementioned reciprocating compressors, many linear compressors have been developed that are simple in structure and can improve compression efficiency without mechanical losses occurring when converting the motor's rotational motion into linear motion, by directly connecting the piston to a drive motor that performs reciprocating linear motion. Generally, a linear compressor is configured such that a piston moves in a reciprocating linear motion inside a cylinder by means of a linear motor within a sealed shell, drawing in and compressing refrigerant, and then discharging it. The piston is supported by springs and can operate in a resonant state. It is common for 12 springs to be provided. FIG. 1 is a cross-sectional view of a linear compressor according to an embodiment of the present invention. Figure 2 is a cross-sectional view taken along 2-2 of Figure 1. FIG. 3 is a perspective view of an assembly in which a resonant spring and a support are connected. FIG. 4 is a drawing showing the supporter, where a is an axial plan view, and b and c are perspective views seen from different angles. FIG. 5 is a drawing illustrating the alignment direction of the resonant springs, wherein a is a drawing of the first resonant spring viewed in the axial direction (rear), b is a drawing of the second resonant spring viewed in the axial direction (forward), and c is a drawing showing the two covers of the front and rear in a single drawing. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that another component may also be "connected," "combined," or "connected" between each component. FIG. 1 is a cross-sectional view of a linear compressor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along 2-2 of FIG. 1. Referring to FIGS. 1 and 2, a linear compressor (10) according to an embodiment of the present invention may include a shell (11) and a first shell cover (12) and a second shell cover (13) coupled to both sides of the shell (11). In a broad sense, the first shell cover (12) and the second shell cover (13) may be understood as components of the shell (11). The shell (11) has a roughly cylindrical shape and can be arranged in a horizontally lying position or in an axially lying position. Based on FIG. 1, the shell (11) is extended horizontally and may have a somewhat lower height in the radial direction. Since the linear compressor (10) can have a low height, for example, when the linear compressor (10) is installed on the base of the machine room of a refrigerator, there is an advantage that the height of the machine room can be reduced. The above linear compressor (10) may include a plurality of pipes that are provided in the shell (11) or shell cover (12, 13) and can suck in, discharge, or inject refrigerant. The plurality of pipes may include a suction pipe (14) that allows the refrigerant to be sucked into the interior of the linear compressor (10). The suction pipe (14) may be connected to the first shell cover (12). The refrigerant may be sucked into the interior of the linear compressor (10) along the axial direction through the suction pipe (14). The plurality of pipes may further include a discharge pipe (not shown) for allowing compressed refrigerant to be discharged from the linear compressor (10) and a process pipe (not shown) for replenishing refrigerant to the linear compressor (10). For example, the discharge pipe and the process pipe may be connected to the outer surface of the shell (11). Support devices (20, 90) that support th