CN115135878A - Check valve and swash plate type compressor including the same - Google Patents

Check valve and swash plate type compressor including the same Download PDF

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Publication number
CN115135878A
CN115135878A CN202180015250.0A CN202180015250A CN115135878A CN 115135878 A CN115135878 A CN 115135878A CN 202180015250 A CN202180015250 A CN 202180015250A CN 115135878 A CN115135878 A CN 115135878A
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CN
China
Prior art keywords
refrigerant
opening
check valve
opening portion
flow
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Pending
Application number
CN202180015250.0A
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Chinese (zh)
Inventor
南宫圭
李周泳
孔成奎
金亮秀
金想垀
孙殷基
安慧林
崔炯寅
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Hanon Systems Corp
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Hanon Systems Corp
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Publication of CN115135878A publication Critical patent/CN115135878A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1009—Distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

The present invention relates to a check valve and a swash plate compressor including the same, wherein the check valve may include: a valve body, wherein a first opening part for the inflow of the refrigerant is formed at the center of one side of the valve body, a hook part is formed at the periphery of one side of the valve body, a second opening part for the discharge of the refrigerant is formed at the other side of the valve body, and the hook part is connected with a connecting groove formed at the suction inlet of the rear shell; and a pulsation reducing unit provided inside the other end portion of the valve body to delay the flow of the refrigerant and reduce pulsation of the refrigerant when the refrigerant flows in from the first opening portion and is discharged to the second opening portion.

Description

Check valve and swash plate type compressor including the same
Technical Field
The present invention relates to a check valve (check valve) and a swash plate type compressor including the same, and more particularly, to a check valve that reduces pulsation by delaying flow of refrigerant and a swash plate type compressor including the same.
Background
Various types of compressors for compressing a refrigerant in a cooling system of a vehicle have been developed, and include a reciprocating compressor which performs compression while a structure for compressing a refrigerant reciprocates, and a rotary compressor which performs compression while a structure for compressing a refrigerant rotates.
Wherein, the reciprocating compressor includes: a crank compressor for transmitting a driving force of a driving source to a plurality of pistons by a crank; a swash plate type compressor transmitting a driving force of a driving source to a rotary shaft having a swash plate; and a wobble plate type compressor using a wobble plate, the rotary compressor including: a vane compressor using a rotating shaft and vanes; and a scroll compressor using an orbiting scroll and a fixed scroll.
The swash plate type compressor is classified into a fixed capacity type in which a setting angle of a swash plate is fixed, and a variable capacity type in which an inclination angle of the swash plate is changed to change a discharge amount.
Fig. 1 discloses one form of a conventional check valve 1. In the conventional check valve 1, a hook 2 is provided on one side of a valve body 3, and an inlet 9 into which a refrigerant flows is provided in the center of the hook 2. An outlet 4 for discharging the refrigerant flowing in from the inlet 9 is provided on the other side of the valve body 3.
Fig. 2 discloses a state in which the check valve 1 shown in fig. 1 is coupled to a stepped portion 6a of a suction port 7 formed in a rear housing 6 of the swash plate compressor by a hook 2. At this time, the check valve 1 functions as a suction valve (suction valve).
Inside the cylinder bores, the pistons reciprocate with the movement of the swash plate, and in order to cause the refrigerant to flow and be compressed, the refrigerant flows into the suction chamber of the rear housing 6 by the internal pressure of the cylinder bores.
At this time, the check valve 1 is provided in the suction port 7 to regulate the flow of the refrigerant.
That is, the refrigerant flowing from the suction port 7 flows into the inflow port 9, and flows into the suction chamber 8 through the outflow port 4 inside the valve body 3.
The structure of the conventional check valve 1 does not significantly reduce the flow rate of the refrigerant in the interior thereof. Therefore, the delay of the refrigerant flow does not occur smoothly in the check valve 1, and the refrigerant flowing in from the inlet 9 is directly discharged from the outlet 4, and the pulsation reducing effect is not produced. This is one of the causes of noise, vibration, and the like of the compressor.
Disclosure of Invention
Technical problem to be solved
The present invention has been made to solve the above-mentioned problems occurring in the related art, and an object of the present invention is to provide a check valve that delays the flow of a refrigerant to reduce pulsation, and a swash plate type compressor including the check valve.
Means for solving the problems
In order to achieve the above object, the present invention relates to a check valve, which may include: a valve body having a first opening formed at a center portion of one side thereof, a hook formed at a periphery of the one side thereof, and a second opening formed at the other side thereof, the hook being coupled to a coupling groove formed at a suction port of the rear case; and a pulsation reducing unit provided inside the other end portion of the valve body to delay the flow of the refrigerant and reduce pulsation of the refrigerant when the refrigerant flows in from the first opening portion and is discharged to the second opening portion.
In addition, in the embodiment of the present invention, the pulsation reducing unit may include a protruding block provided to protrude in the first opening portion direction inside the other end portion of the valve body so as to collide the refrigerant flowing in from the first opening portion and delay the flow to reduce the pulsation of the refrigerant.
In the embodiment of the present invention, a flat portion may be formed at an upper end portion of the protruding block, and the flat portion may collide with the refrigerant flowing in from the first opening portion, delay the flow, and discharge the refrigerant in the direction of the second opening portion.
In addition, in the embodiment of the present invention, the pulsation reducing unit may further include a first recessed portion formed between the second opening portion and the protruding block inside the other end portion of the valve body, and the refrigerant to be flowed in and the refrigerant to be flowed out collide with each other inside the first recessed portion to reduce pulsation.
In the embodiment of the present invention, the first recessed portion may have a curved shape connecting an end of the protruding block and an end of the second opening portion.
In addition, in the embodiment of the present invention, an auxiliary flow hole may be formed at an upper end portion of the protrusion block, and the auxiliary flow hole additionally discharges the refrigerant flowing in from the first opening portion to compensate for a flow restriction of the refrigerant caused by forming the protrusion block.
In addition, in the embodiment of the present invention, the auxiliary flow hole may be formed in plurality at an upper end portion of the protrusion block.
In addition, in the embodiment of the present invention, the pulsation reducing unit may include an interference protrusion provided adjacent to the second opening portion inside the other end portion of the valve body and protruding in a direction of the first opening portion to interfere with a flow of the refrigerant discharged to the second opening portion to reduce the pulsation.
In the embodiment of the present invention, the blocking protrusion may be provided between the width intervals (D1) of the second opening portion to block the flow of the refrigerant discharged to the second opening portion, thereby reducing pulsation.
In addition, in the embodiment of the present invention, the blocking protrusion may have a cylindrical shape.
In the embodiment of the present invention, the second opening portion may be formed in plural on the other side of the valve body, and the pulsation reducing unit may include a guide protrusion that is provided between the second opening portions on the inner side of the other end portion of the valve body and protrudes in the direction of the first opening portion so as to disperse the flow of the refrigerant flowing from the first opening portion to the second opening portion and reduce the pulsation.
In the embodiment of the present invention, the plurality of guide projections may be provided inside the other end portion of the valve body, and a pair of guide projections provided on both sides of one of the plurality of second openings may be formed with a linear portion in a direction toward the second opening, respectively, to guide a flow of the refrigerant from a center side of the valve body toward the second opening.
In addition, in the embodiment of the present invention, the interval (D2) between the pair of linear portions may be set within the width interval (D1) of the second opening portion.
In addition, in the embodiment of the present invention, the pulsation reducing unit may further include a second recess portion formed between the second opening portion and the guide projection inside the other end portion of the valve body, and inside the second recess portion, the refrigerant that flows in and the refrigerant that is to flow out collide with each other to reduce the pulsation.
In the embodiment of the present invention, the pulsation reducing unit may include a base block connected to a lower end portion of the second opening portion inside the other end portion of the valve body and provided to protrude in the direction of the first opening portion so as to collide with the refrigerant flowing from the first opening and delay the flow to reduce the pulsation.
In the embodiment of the present invention, a rounded portion may be formed on an outer periphery of an upper end portion of the base block, and the refrigerant flowing in from the first opening portion may flow in the direction of the second opening portion along the rounded portion after colliding with the upper end portion of the base block.
In addition, in the embodiment of the present invention, an extension protrusion extending from a center side of the base block in the direction of the second opening may be formed in the base block, and the extension protrusion may guide a flow of the refrigerant from the center side of the base block in the direction of the second opening.
In addition, in the embodiment of the present invention, the width intervals (D4) of the extension protrusions may be disposed between the width intervals (D1) of the second opening part.
The swash plate type compressor of the present invention may include: a cylinder body formed with a cylinder hole; a front housing coupled to a front of the cylinder block to form a crank chamber; a rear housing coupled to a rear of the cylinder block to form a suction chamber and a discharge chamber; and a check valve according to any one of the above embodiments, provided at a suction port formed at the suction chamber.
Effects of the invention
According to the present invention, the pistons reciprocate inside the cylinder bores by the movement of the swash plate, at which time pulsation is necessarily generated in the flow of the refrigerant, and such pulsation phenomenon can be reduced by delaying the flow of the refrigerant inside the check valve.
As a result, vibration and noise of the swash plate compressor can be reduced, thereby contributing to improvement in quality.
Drawings
Fig. 1 is a diagram illustrating a conventional check valve.
Fig. 2 is a side view illustrating a state in which the conventional check valve shown in fig. 1 is mounted on a rear housing of a swash plate type compressor.
Fig. 3 is a side view showing a structure of a swash plate type compressor of the present invention.
Fig. 4 is a diagram showing a first embodiment of the check valve of the present invention.
Fig. 5 is a view showing a state in which the check valve shown in fig. 4 is disposed in the discharge chamber of the rear case.
Fig. 6 is a graph comparing the degree of pulsation between a conventional check valve and the check valve of the present invention.
Fig. 7 is a side view showing a second embodiment of the check valve of the present invention.
Fig. 8 is a top view of the check valve shown in fig. 7.
Fig. 9 is a side view showing another mode of the check valve according to the second embodiment of the present invention.
Fig. 10 shows a side view of a third embodiment of the check valve of the present invention.
Fig. 11 is a top view of the check valve shown in fig. 10.
Fig. 12 is a side view showing a fourth embodiment of the check valve of the present invention.
Fig. 13 is a top view of the check valve shown in fig. 12.
Fig. 14 is a side view showing a fifth embodiment of the check valve of the present invention.
Fig. 15 is a top view of the check valve shown in fig. 14.
Detailed Description
Hereinafter, preferred embodiments of a check valve and a swash plate type compressor including the same according to the present invention will be described in detail with reference to the accompanying drawings.
First, a basic form of the swash plate type compressor according to the present invention will be described with reference to fig. 3. However, the present invention is not limited to being applied to such a structure, and the description of the swash plate type compressor is effective only in understanding the scope of the present invention.
Referring to fig. 3, the swash plate type compressor 10 has a cylinder block 20 forming a part of an outer appearance and a frame. At this time, a center hole 21 is formed through the center of the cylinder block 20, and the shaft 60 is rotatably provided in the center hole 21.
The cylinder block 20, the front housing 30 and the rear housing 40 may be included to be referred to as a housing 10.
A plurality of cylinder holes 22 are formed through the cylinder block 20 so as to radially surround the center hole 21, and the piston 70 is provided inside the cylinder holes 22 so as to be linearly reciprocated. At this time, the piston 70 is formed in a cylindrical shape, the cylinder bore 22 is a cylindrical space corresponding thereto, and the refrigerant in the cylinder bore 22 is compressed by the reciprocating motion of the piston 70. The cylinder bore 22 and the piston 70 form a compression chamber.
A front housing 30 is coupled to a front of the cylinder block 20. The front housing 30 has a surface facing the cylinder block 20 recessed to form a crank chamber 31 together with the cylinder block 20.
A pulley 32 connected to an external power source (not shown) such as an engine is rotatably provided in front of the front housing 30, and the shaft 60 rotates in conjunction with the rotation of the pulley 32.
A rear housing 40 is coupled to the rear of the cylinder block 20. At this time, in the rear housing 40, a discharge chamber 41 is formed along a position adjacent to the outer peripheral edge of the rear housing 40 to selectively communicate with the cylinder holes 22.
The suction port 45 is formed on one side of the rear case 40, and is connected to the suction chamber 42 disposed in the center of the rear case 40. However, the present invention is not limited thereto, and may be located at other positions according to the type of the compressor.
At this time, the valve plate 50 is interposed between the cylinder block 20 and the rear housing 40, and the discharge chamber 41 communicates with the cylinder bore 22 through a discharge port formed in the valve plate 50.
In addition, a swash plate 61 is provided on the outer circumferential surface of the shaft 60 and connected to each piston 70 by a guide block 62 provided along the edge of the swash plate 61, and the pistons 70 are linearly reciprocated in the cylinder bores 22 by the rotation of the swash plate 61.
At this time, in order to adjust the refrigerant discharge amount of the compressor 10, it is provided that the angle of the swash plate 61 with respect to the shaft 60 may be changed. For this reason, the opening degree of a passage that communicates the discharge chamber 41 with the crank chamber 31 is adjusted by a pressure regulating valve (not shown).
In the conventional swash plate compressor having the above-described configuration, most of the cylinder bores 22 formed in the cylinder block 20 are formed in a radially symmetrical configuration in which the cylinder bores are radially spaced apart from each other about the shaft 60.
When the swash plate 61 is rotated by the above-described structure, the plurality of pistons 70 are moved to compress the refrigerant, the valve is opened by the oil pressure, and the compressed refrigerant is pushed to the discharge chamber 41 through the discharge port of the valve plate 50.
A check valve 100 is provided in a suction passage 43 connecting the outside to the suction chamber 42. The check valve 100 flows the refrigerant from the outside into the suction chamber 42 according to the pressure formed inside the pistons 70 and the cylinder bores 22 by the movement of the swash plate 61. The check valve 100 maintains a relatively uniform pressure when the refrigerant flows in, thereby having an effect of reducing noise and vibration at the time of operation of the compressor.
Fig. 4 is a diagram showing a first embodiment of the check valve 100 of the present invention, fig. 5 is a diagram showing a state in which the check valve 100 shown in fig. 4 is disposed in the discharge chamber of the rear housing 40, and fig. 6 is a diagram comparing the degree of pulsation between the conventional check valve 100 and the check valve 100 of the present invention.
Referring to fig. 4 and 5, the first embodiment of the check valve 100 of the present invention may include a first opening portion 120, a hook portion 112, a second opening portion 130, a valve body 110, and a pulsation reducing unit 200.
The valve body 110 forms a main body of the check valve 100, and may be formed in a cylindrical shape as a whole.
The first opening portion 120 may be provided at a center portion of one side of the valve body 110 and may be a portion into which a coolant flows. The second opening 130 may be formed along the other side of the valve body 110, and may be a portion through which the refrigerant flowing in through the first opening 120 is discharged.
The hook 112 may be provided along one side circumference of the valve body 110 and may be coupled to a coupling groove 45a formed at the suction port 45 of the rear case 40.
Next, the pulsation reducing unit 200 may be provided inside the other end portion of the valve body 110 to delay the flow of the refrigerant and reduce the pulsation of the refrigerant when the refrigerant flows in from the first opening portion 120 and is discharged to the second opening portion 130.
In the first embodiment of the present invention, the pulsation reducing unit 200 may include a protrusion block 210, and the protrusion block 210 may be provided to protrude toward the first opening 120 inside the other end of the valve body 110 so as to collide with the refrigerant flowing from the first opening 120 and delay the flow of the refrigerant, thereby reducing the pulsation of the refrigerant.
A flat portion 213 may be formed at an upper end of the protrusion block 210 so that the refrigerant flowing in from the first opening 120 collides with the flat portion to delay the flow of the refrigerant and is discharged toward the second opening 130.
Referring to fig. 5, it is possible to confirm a state where the protrusion block 210 is provided, and the refrigerant flowing in through the first opening part 120 collides at an upper portion of the protrusion block 210 indicated by an X region to be dispersed along the outer circumference of the protrusion block 210.
And enters the suction chamber 42 along the direction of the second opening 130 to flow into the suction chamber.
At this time, the refrigerant collides with the protrusion block 210 and is delayed in the process of detouring along the outer circumference. That is, the flow velocity of the refrigerant is reduced, and as the time remaining inside the check valve 100 is extended, the pulsation of the refrigerant is reduced.
In other words, as the time for the refrigerant flowing in from the first opening 120 to flow out to the second opening 130 is extended, the pulsation of the refrigerant is naturally reduced by the delay effect while passing through the check valve 100.
In the first embodiment of the present invention, the pulsation reducing unit 200 may further include a first recess 211, and the first recess 211 may be formed between the second opening portion 130 and the protruding block 210 inside the other end portion of the valve body 110.
In the first recess 211, the refrigerant flowing into the first recess 211 and the refrigerant flowing out of the first recess 211 collide with each other, thereby reducing the flow velocity of the refrigerant and reducing pulsation.
That is, in the first embodiment of the present invention, the protruding block 210 and the first recess 211 in which the flat portion 213 is formed reduce the flow velocity of the refrigerant by collision inside the check valve 100, thereby achieving the effect of reducing pulsation.
The first recess 211 may have a curved shape connecting an end of the protruding block 210 and an end of the second opening 130. This is to smoothly discharge the refrigerant, which is offset in the first recess 211 and has a decreased flow velocity, to the second opening 130 by connecting the end of the protruding block 210 and the end of the second opening 130 in a curved shape.
By forming the protruding block 210 and the first recess 211 having the above flat portion 213, the flow of the refrigerant is delayed, thereby reducing the flow rate of the refrigerant, which increases the time for which the refrigerant remains inside the check valve 100, eventually reducing the pulsation of the refrigerant.
Next, referring to fig. 6, comparative experimental data of pulsating pressure at the suction port between the conventional check valve a and the check valve B of the present invention is disclosed.
In the case of the check valve a of the prior art, the pulsating pressure was determined to be 0.0248bar, and in the case of the check valve B of the invention, the pulsating pressure was determined to be 0.0214 bar. Results were obtained with a reduction in pulsating pressure of around 13%.
That is, as seen from the reduction result of the pulsating pressure, the check valve B of the present invention reduces the flow velocity of the refrigerant as compared with the conventional check valve a, thereby obtaining an effect of reducing the pulsation of the refrigerant as a whole.
On the other hand, fig. 7 is a side view showing a second embodiment of the check valve 100 of the present invention, fig. 8 is a plan view of the check valve 100 shown in fig. 7, and fig. 9 is a side view showing another mode of the second embodiment of the check valve 100 of the present invention.
Referring to fig. 7 to 9, the structure of the second embodiment of the check valve 100 of the present invention can be confirmed. In the second embodiment of the check valve 100 of the present invention, an auxiliary flow hole 215 may be included in addition to the first opening portion 120, the second opening portion 130, the hook portion 112, the valve body 110, the protrusion block 210, and the first recess portion 211 described above.
The first opening portion 120, the second opening portion 130, the hook portion 112, the valve body 110, the protruding block 210, and the first recess portion 211 are explained as same as the first embodiment, and therefore, explanation thereof is omitted below.
The auxiliary moving hole 215 may be formed at an upper end portion of the protrusion block 210. Such an auxiliary flow hole 215 may be provided to additionally discharge the refrigerant flowing in from the first opening 120 to the suction chamber 42 so as to compensate for the flow obstruction of the refrigerant generated when the protrusion block 210 is formed.
Referring to fig. 7, since the auxiliary orifice 215 is formed, a part of the refrigerant flowing in from the first opening part 120 directly flows into the suction chamber 42 through the auxiliary orifice 215, so that it is possible to compensate for a change in the amount of supplied refrigerant due to a decrease in the flow velocity at the protruding block 210 and the first recess 211 to some extent.
Fig. 8 discloses a state in which the auxiliary flow hole 215 is formed in a relatively large diameter, and fig. 9 discloses a state in which the auxiliary flow hole 215 is formed in a plurality in a relatively small diameter at an upper end portion of the protrusion block 210. The position, size and number of the auxiliary flow holes 215 may be changed according to design specifications.
On the other hand, fig. 10 is a side view showing a third embodiment of the check valve 100 of the present invention, and fig. 11 is a plan view of the check valve 100 shown in fig. 10.
In the third embodiment of the check valve 100 according to the present invention, the first opening portion 120, the second opening portion 130, the hook portion 112, and the valve body 110 are explained in the same manner as in the first embodiment, and therefore, explanation thereof is omitted below. Hereinafter, the pulsation reducing unit 200 different from the first embodiment is explained.
Referring to fig. 10 and 11, in the third embodiment of the check valve 100 of the present invention, the pulsation reducing unit 200 may include the interference protrusion 220.
The blocking protrusion 220 may be disposed adjacent to the second opening portion 130 inside the other end portion of the valve body 110 and be formed to protrude toward the first opening portion 120 to block the flow of the refrigerant discharged to the second opening portion 130, thereby reducing pulsation.
Referring to fig. 10, in the embodiment of the present invention, the blocking protrusion 220 may be implemented in a cylindrical shape, and since four second opening portions 130 are formed along the other side circumference of the valve body 110, the four blocking protrusions 220 may be disposed adjacent to the second opening portions 130, respectively. Of course, the shape of the above-described interference protrusion 220 is not limited to the cylindrical shape.
Since the blocking protrusion 220 is disposed adjacent to the second opening 130, when the refrigerant flowing in from the first opening 120 passes through the blocking protrusion 220, the refrigerant bypasses and enters in the direction of the second opening 130.
Referring to fig. 11, the blocking protrusion 220 is provided between the width intervals D1 of the second opening 130, and functions to block the flow of the refrigerant discharged to the second opening 130 and reduce the pulsation of the refrigerant.
The blocking protrusion 220 may have a width smaller than the width interval D1 of the second opening 130.
The blocking protrusion 220 is preferably provided at the center of the width interval D1 of the second opening 130 to cause a uniform flow blocking in the left-right direction of the second opening 130 when the refrigerant is discharged into the second opening 130.
As shown by the arrow indicating the flow direction of the refrigerant shown in fig. 11, the refrigerant bypasses the blocking projection 220 and is discharged to the suction chamber 42 through the second opening portion 130.
Due to such flow inhibition by the inhibition projection 220, the flow velocity of the refrigerant is reduced, and the time remaining in the check valve 100 is increased, thereby finally deriving the effect of reducing pulsation of the refrigerant.
On the other hand, fig. 12 is a side view showing a fourth embodiment of the check valve 100 of the present invention, and fig. 13 is a plan view of the check valve 100 shown in fig. 12.
In the check valve 100 according to the fourth embodiment of the present invention, the first opening portion 120, the second opening portion 130, the hook portion 112, and the valve body 110 are explained in the same manner as in the first embodiment, and therefore, the explanation thereof is omitted below. Next, a pulsation reducing unit 200 different from the first embodiment is explained.
In the fourth embodiment of the present invention, the pulsation reducing unit 200 may include a guide protrusion 230, and the guide protrusion 230 may be provided between the plurality of second opening portions 130 inside the other end portion of the valve body 110 and protrude toward the first opening portion 120 to disperse the flow of the refrigerant flowing from the first opening portion 120 to the second opening portion 130, thereby reducing the pulsation.
Referring to fig. 13, a plurality of guide protrusions 230 may be provided inside the other end portion of the valve body 110.
Further, the pair of guide protrusions 230 provided on both sides of one second opening 130 among the plurality of second openings 130 may have a straight portion 231 formed along a direction toward the second opening 130, and the pair of straight portions 231 may guide a flow of the refrigerant from the center side of the valve body 110 toward the second opening 130.
In this case, the distance D2 between the pair of linear portions 231 may be set within the width distance D1 of the second opening 130. This is to smoothly discharge the refrigerant guided by the pair of straight portions 231 to the second opening portion 130.
That is, the plurality of guide protrusions 230 are disposed between the plurality of second opening portions 130, and collide with the refrigerant flowing in from the first opening portion 120 to reduce the flow velocity of the refrigerant, thereby reducing the pulsation of the refrigerant.
In order to compensate for the refrigerant discharge flow to the second opening 130, the straight portion 231 is formed, for example, in the same manner as the auxiliary flow hole 215 of the first embodiment, so as to compensate for the refrigerant supply according to the blocked refrigerant flow amount.
As a result, as shown by an arrow indicating the flow direction of the refrigerant shown in fig. 13, the refrigerant collides with the guide protrusion 230, bypasses the guide protrusion 230, is guided along the straight portion 231, and is discharged to the suction chamber 42 through the second opening portion 130.
Due to such flow obstruction of the above-described guide protrusion 230, the flow velocity of the refrigerant is reduced, and the time remaining inside the check valve 100 is increased, so that the effect of reducing pulsation of the refrigerant can be derived.
Further, the pair of straight portions 231 is formed to guide the flow of the refrigerant to the second opening portion 130, thereby compensating for the supply of the refrigerant.
Next, the pulsation reducing unit 200 may further include a second recess 233, and the second recess 233 is formed between the second opening 130 and the guide protrusion 230 inside the other end portion of the valve body 110. Inside such a second recess 233, the refrigerant flowing in and the refrigerant to be flowed out collide with each other, similarly in function to the first recess 211 of the first embodiment, thereby reducing pulsation.
That is, in the fourth embodiment of the present invention, the following effects are achieved by the configuration of the guide protrusion 230, the linear portion 231, and the second recessed portion 233: the flow of the refrigerant is guided while reducing the flow velocity of the refrigerant by collision inside the check valve 100 to reduce pulsation, and the flow of the refrigerant due to the reduction in the flow velocity of the refrigerant is compensated.
On the other hand, fig. 14 is a side view showing a fifth embodiment of the check valve 100 of the present invention, and fig. 15 is a plan view of the check valve 100 shown in fig. 14.
In the check valve 100 according to the fifth embodiment of the present invention, the first opening portion 120, the second opening portion 130, the hook portion 112, and the valve body 110 are explained in the same manner as in the first embodiment, and therefore, the explanation thereof is omitted below. Next, a pulsation reducing unit 200 different from the first embodiment is explained.
In the fifth embodiment of the present invention, the pulsation reducing unit 200 may be configured to include a base block 240 and an extension protrusion 245.
The base block 240 may be connected to a lower end of the second opening 130 inside the other end of the valve body 110 and may be provided to protrude toward the first opening 120 so that the refrigerant flowing in from the first opening 120 collides with the base block to delay the flow of the refrigerant and reduce pulsation.
In this case, a rounded portion 241 may be formed on the outer circumference of the upper end of the base block 240, and the refrigerant flowing in from the first opening 120 may collide with the upper end of the base block 240 and then flow toward the second opening 130 along the rounded portion 241.
Since the center portion of the upper end of the base block 240 is flat, the refrigerant flowing in from the first opening 120 collides and delays the flow.
Referring to fig. 14, it is confirmed that the base block 240 is installed, and the refrigerant flowing in through the first opening 120 collides with the center of the upper end of the base block 240 and is dispersed along the outer circumference of the base block 240.
The flow is smoothly guided along the rounded portion 241, and the flow enters the second opening 130 and is discharged into the suction chamber 42.
At this time, the refrigerant collides with the base block 240 and is delayed in flowing while detouring in the outer circumferential direction of the base block 240. That is, the flow rate of the refrigerant decreases, and as the time remaining in the check valve 100 increases, the pulsation of the refrigerant decreases.
The extension protrusion 245 may be formed to extend from the center of the base block 240 toward the second opening 130. The extension protrusion 245 may perform a function of guiding a flow of the refrigerant from the center side of the base block 240 toward the second opening 130.
The width interval D4 of the extension protrusion 245 may be set between the width intervals D1 of the second opening 130. Therefore, the refrigerant guided along the rounded portion 241 of the base block 240 in the direction of the second opening 130 is guided to the second opening 130 by the extension protrusion 245.
That is, in the fifth embodiment of the present invention, the following effects are achieved by the configuration of the base block 240 and the extension projection 245: the flow velocity of the refrigerant is reduced by collision inside the check valve 100 to reduce pulsation, guide the flow of the refrigerant, and compensate for the flow of the refrigerant caused by the reduction of the flow velocity of the refrigerant.
The above matters show only a specific embodiment of the check valve and the swash plate type compressor including the same.
Therefore, those skilled in the art will appreciate that the present invention can be replaced and modified in various ways without departing from the scope of the present invention.
Industrial applicability
The present invention relates to a check valve and a swash plate compressor, which are industrially applicable.

Claims (19)

1. A check valve, comprising:
a valve body having a first opening formed at a center portion of one side thereof, a hook formed at a periphery of the one side thereof, and a second opening formed at the other side thereof, the hook being coupled to a coupling groove formed at a suction port of the rear case; and
and a pulsation reducing unit provided inside the other end portion of the valve body to delay the flow of the refrigerant and reduce pulsation of the refrigerant when the refrigerant flows in from the first opening portion and is discharged to the second opening portion.
2. The check valve of claim 1,
the pulsation reducing unit includes a protruding block provided to protrude toward the first opening portion inside the other end portion of the valve body so as to collide with the refrigerant flowing in from the first opening portion and delay the flow to reduce pulsation of the refrigerant.
3. The check valve of claim 2,
a flat portion that causes the refrigerant flowing in from the first opening portion to collide with the flat portion, delays the flow, and is discharged toward the second opening portion is formed at an upper end portion of the protruding block.
4. The check valve of claim 3,
the pulsation reducing unit further includes a first recessed portion formed between the second opening portion and the protruding block inside the other end portion of the valve body,
inside the first recess, the refrigerant that flows in and the refrigerant that is to flow out collide with each other to reduce pulsation.
5. The check valve of claim 4,
the first recessed portion has a curved shape connecting an end of the protruding block and an end of the second opening portion.
6. The check valve of claim 3,
an auxiliary flow hole is formed at an upper end portion of the protruding block, and the auxiliary flow hole additionally discharges the refrigerant flowing in from the first opening portion to compensate for a flow obstruction of the refrigerant caused by the formation of the protruding block.
7. The check valve of claim 6,
the auxiliary flow hole is formed in plurality at an upper end portion of the protrusion block.
8. The check valve of claim 1,
the pulsation reducing unit includes an interference protrusion provided adjacent to the second opening portion inside the other end portion of the valve body and protruding in a direction of the first opening portion to interfere with a flow of the refrigerant discharged to the second opening portion to reduce pulsation.
9. The check valve of claim 8,
the blocking protrusions are provided between the width intervals (D1) of the second opening, and block the flow of the refrigerant discharged to the second opening to reduce pulsation.
10. The check valve of claim 8,
the interference protrusion has a cylindrical shape.
11. The check valve of claim 1,
a plurality of second opening portions are formed on the other side of the valve body,
the pulsation reducing unit includes a guide projection provided between the plurality of second opening portions inside the other end portion of the valve body and projecting in the direction of the first opening portion so as to disperse the flow of the refrigerant flowing from the first opening portion to the second opening portion and reduce pulsation.
12. The check valve of claim 11,
the guide protrusions are provided in plurality on an inner side of the other end portion of the valve body,
the pair of guide protrusions provided on both sides of one of the second opening portions is formed with a straight portion in a direction toward the second opening portion, respectively, and guides a flow of the refrigerant from a center side of the valve body toward the second opening portion.
13. The check valve of claim 12,
the distance (D2) between the pair of linear portions is set within the width distance (D1) of the second opening.
14. The check valve of claim 11,
the pulsation reducing unit further includes a second recessed portion formed between the second opening portion and the guide protrusion inside the other end portion of the valve body,
inside the second recess, the refrigerant that flows in and the refrigerant that is to flow out collide with each other to reduce pulsation.
15. The check valve of claim 1,
the pulsation reducing unit includes a base block connected to a lower end portion of the second opening portion inside the other end portion of the valve body and provided to protrude in a direction of the first opening portion so as to collide with the refrigerant flowing from the first opening and delay a flow to reduce pulsation.
16. The check valve of claim 15,
a rounded portion is formed on the outer periphery of the upper end portion of the base block,
the refrigerant flowing from the first opening portion collides with the upper end portion of the base block and then flows in the direction of the second opening portion along the rounded portion.
17. The check valve of claim 16,
an extension projection extending from the center side of the base block toward the second opening is formed on the base block,
the extending projection guides the flow of the refrigerant from the center side of the base block toward the second opening portion.
18. The check valve of claim 17,
the width intervals (D4) of the extension protrusions are set between the width intervals (D1) of the second opening part.
19. A swash plate type compressor comprising:
a cylinder block formed with a cylinder bore;
a front housing coupled to a front of the cylinder block to form a crank chamber;
a rear housing coupled to a rear of the cylinder block to form a suction chamber and a discharge chamber; and
the check valve of claim 1, disposed at a suction port formed at the suction chamber.
CN202180015250.0A 2020-02-19 2021-02-01 Check valve and swash plate type compressor including the same Pending CN115135878A (en)

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KR1020200020135A KR20210105536A (en) 2020-02-19 2020-02-19 Check valve and swash plate type compressor
KR10-2020-0020135 2020-02-19
PCT/KR2021/001276 WO2021167265A1 (en) 2020-02-19 2021-02-01 Check valve and swash plate compressor including same

Publications (1)

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JPH05288186A (en) * 1992-04-06 1993-11-02 Zexel Corp Inlet valve for compressor
CN1488039A (en) * 2001-12-27 2004-04-07 株式会社丰田自动织机 Compressor
CN101173654A (en) * 2006-11-03 2008-05-07 株式会社丰田自动织机 Suction throttle valve of a compressor
KR101194431B1 (en) * 2007-10-19 2012-10-24 산덴 가부시키가이샤 Variable capacity compressor
KR20130092876A (en) * 2012-02-13 2013-08-21 한라비스테온공조 주식회사 Swash plate type variable capacity compressor
KR20140094799A (en) * 2013-01-23 2014-07-31 한라비스테온공조 주식회사 Swash plate type compressor
KR20140104300A (en) * 2013-02-20 2014-08-28 한라비스테온공조 주식회사 Intake checking valve
KR20170043235A (en) * 2015-10-13 2017-04-21 한온시스템 주식회사 Suction damping device of compressor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05288186A (en) * 1992-04-06 1993-11-02 Zexel Corp Inlet valve for compressor
CN1488039A (en) * 2001-12-27 2004-04-07 株式会社丰田自动织机 Compressor
CN101173654A (en) * 2006-11-03 2008-05-07 株式会社丰田自动织机 Suction throttle valve of a compressor
US20080107544A1 (en) * 2006-11-03 2008-05-08 Sokichi Hibino Suction throttle valve of a compressor
KR101194431B1 (en) * 2007-10-19 2012-10-24 산덴 가부시키가이샤 Variable capacity compressor
KR20130092876A (en) * 2012-02-13 2013-08-21 한라비스테온공조 주식회사 Swash plate type variable capacity compressor
KR20140094799A (en) * 2013-01-23 2014-07-31 한라비스테온공조 주식회사 Swash plate type compressor
KR20140104300A (en) * 2013-02-20 2014-08-28 한라비스테온공조 주식회사 Intake checking valve
KR20170043235A (en) * 2015-10-13 2017-04-21 한온시스템 주식회사 Suction damping device of compressor

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