JP2013177820A - Reed valve and compression device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-manufacture reed valve superior in durability, and to provide a compression device having the reed valve.SOLUTION: A reed member of a reed valve 1 includes a seating-side reed member 40 and a stopper-side reed member 50. The seating-side reed member 40 is disposed on a valve base-side where a seating face is formed, and the stopper-side reed member 50 is disposed on the seating-side reed member 40. A spacer member 60 is interposed between the seating-side reed member 40 and the stopper-side reed member 50. When the valve is opened and closed, the stopper-side reed member 50 operates after the seating-side reed member 40. When the valve is opened, the stopper-side reed member 50 collides with the seating-side reed member 40, and absorbs a collision force. When the valve is closed, the fluttering of the seating-side reed member 40 can be prevented by the stopper-side reed member 50.

Description

  The present invention relates to a reed valve that opens and closes a fluid flow path, and a compression device including the reed valve.

  A typical reed valve has a valve base, a plate-like lead member fixed to the valve base, and a stopper member provided on the opposite side of the valve base with the lead member interposed therebetween. A through hole-like inlet is formed in the valve base. In a state where no external force is applied, the lead member covers the inflow port, abuts on the peripheral portion of the inflow port in the valve base (valve arrival), and closes the inflow port. When the fluid flows into the lead member through the inlet and presses the lead member, the elastically deformed lead member is separated from the valve base (opened) and opens the inlet. By the opening / closing operation of the lead member, the reed valve regulates the flow direction of the fluid in one direction.

  By the way, when the valve is opened, a large force is applied to the lead member in the direction of opening the inlet (hereinafter referred to as the opening direction). At this time, if the deformation amount of the lead member is excessive, the lead member may be plastically deformed so that it does not return to its original shape, and the inflow port may not be closed. In order to suppress such excessive deformation of the lead member, generally, a stopper member that is more difficult to deform than the lead member is disposed at a position opposite to the inlet with the lead member interposed therebetween. When a force in the opening direction acts on the lead member, the lead member deformed by a predetermined amount in the opening direction comes into contact with the stopper member and is not further deformed. For this reason, excessive deformation of the lead member is suppressed.

  However, if the lead member has a high deformation rate (valve opening speed), such as when the fluid inflow rate is high and a sudden, large force is applied to the lead member, the lead member abruptly contacts the stopper member and makes noise ( Sound) may occur.

  A technique for suppressing such a hitting sound by providing two lead members has been proposed (see, for example, Patent Document 1).

  The reed valve introduced in Patent Document 1 has two lead members. One lead member (discharge lead) has a flat plate shape and elastically deforms to open and close the inlet. The other lead member (spring lead) has a refracted plate shape and is elastically deformable. The spring lead is disposed between the stopper member and the discharge lead. The discharge lead deformed in the opening direction comes into contact with the spring lead before the stopper member. Since the spring lead is elastically deformable, it absorbs the impact applied by the discharge lead. Therefore, it is considered that the hitting sound described above can be suppressed.

  By the way, according to the reed valve of Patent Document 1, the strength of the spring lead in the vicinity of the refracted portion (referred to as a refracting portion) becomes low (becomes brittle), so that the durability of the spring lead decreases in the vicinity of the refracting portion. When the spring lead is deteriorated in durability, the impact due to the discharge lead cannot be absorbed, and the hitting sound described above is generated. Further, the rigidity of the spring lead near the refracted portion is increased. For this reason, the sling lead is hardly elastically deformed in the vicinity of the refracting portion. It is extremely difficult to manufacture such a spring lead so as to have a desired shape and spring constant, and it is also necessary to improve manufacturing efficiency.

JP 2002-195160 A

  This invention is made | formed in view of the said situation, and makes it a subject to provide the reed valve which is excellent in durability, and can be manufactured easily, and the compression apparatus which has this reed valve.

The reed valve of the present invention is a reed valve attached to a valve base having an inflow port having a through hole shape,
A seating-side lead member that has a flat plate shape, is elastically deformable, and has a first fixed portion that can be fixed to the valve base, and a first movable portion that is continuous with the first fixed portion and can open and close the inlet. When,
A spacer member overlaid on the first fixed portion of the seating side lead member;
A second fixed portion that is formed in a flat plate shape and is elastically deformable and is stacked on the spacer member; and a second movable portion that is continuous with the second fixed portion and faces the first movable portion while being spaced apart from the first movable portion. A stopper side lead member having,
A stopper member superimposed on the stopper-side lead member.

The reed valve of the present invention preferably includes either (1) or (2) below, and more preferably includes both.
(1) The spring constant of the stopper side lead member is equal to or less than the spring constant of the seating side lead member.
(2) The seating side lead member and the stopper side lead member have the same shape.

Another reed valve of the present invention is a reed valve attached to a valve base having an inflow port having a through hole shape,
A seating-side lead member that has a flat plate shape, is elastically deformable, and has a first fixed portion that can be fixed to the valve base, and a first movable portion that is continuous with the first fixed portion and can open and close the inlet. When,
A second fixing portion provided on the opposite side of the valve base so as to face the seating-side lead member, having a flat plate shape and elastically deformable, is continuous with the second fixing portion. A stopper-side lead member having a second movable portion facing the first movable portion while being spaced apart from the first movable portion;
And a stopper member provided opposite to the seating side lead member and facing the stopper side lead member. The reed valve of the present invention also preferably includes any one of the above (1) and (2), and more preferably includes both.

  The compression device of the present invention is a device including the above-described reed valve of the present invention. The reed valve of the present invention, the compression chamber, and the inflow of fluid from the outside toward the compression chamber in communication with the compression chamber. A casing having a first valve chamber constituting a passage; a second valve chamber communicating with the compression chamber and constituting an outflow passage for the fluid from the compression chamber toward the outside; and disposed in the compression chamber. A part of the partition wall that partitions the first valve chamber, the compressor part changing a fluid pressure in the compression chamber by moving in the compression chamber, and a drive part that drives the compression part. A first valve base having a first inlet having a through-hole shape and serving as a flow path for the fluid from the outside toward the first valve chamber, and a partition wall defining the second valve chamber. The part has a through-hole shape and the first part from the compression chamber. A second valve base having a second inlet serving as a fluid flow path toward the valve chamber is configured, and the reed valve is fixed to the first valve base and the second valve base one by one. It is what.

  The reed valve of the present invention has two lead members (a seating side lead member and a stopper side lead member) having a flat plate shape. A flat lead member is superior in durability to a refracting lead member, and can be easily manufactured to have a desired shape and spring constant. Therefore, the reed valve of the present invention can be easily manufactured and has excellent durability.

  In the reed valve of the present invention, the seating-side lead member deformed in the opening direction comes into contact with the stopper-side lead member before the stopper member. Since the stopper side lead member can be elastically deformed, the impact applied by the seating side lead member is absorbed. For this reason, according to the reed valve of this invention, generation | occurrence | production of a hitting sound can be suppressed similarly to the conventional reed valve.

  By the way, in the conventional reed valve provided with a lead member composed of only one lead, there is a case where a delay in the operation of the reed valve occurs when the valve is closed. In other words, when the inflow of fluid from the outside to the valve chamber stops via the inlet, or when the fluid flows from the outside to the valve chamber via the outlet, the fluid pressing force toward the opening direction is small. In this case, the lead member returns to its original shape due to its own elasticity and closes the inlet. At this time, when the pressing force of the fluid in the opening direction is rapidly reduced, the lead member vigorously closes the inlet. Then, the lead member comes into contact with the valve base vigorously, and noise (sounding sound) is generated. Further, when the lead member abutting against the valve base rebounds vigorously, the inlet port once closed by the lead member opens, and the inlet port cannot be quickly closed by the lead valve, causing a delay in the operation of the lead valve. In addition, since the lead member deformed in the opening direction comes into contact with the stopper member, depending on the use state of the reed valve, an adhesive such as machine oil is interposed between the lead member and the stopper member, and the lead member becomes the stopper member. There is a possibility of sticking to. Also in this case, the inlet cannot be quickly closed by the reed valve, and the operation of the reed valve is delayed.

  In Patent Document 1 described above, it is described that the lead member is composed of two leads (discharge lead, spring lead), and the spring is refracted so that the delay of the operation of the reed valve can be suppressed. ing. That is, in the reed valve of Patent Document 1, since the spring lead has a refracted plate shape, the spring lead is disposed with an inclination with respect to the discharge lead. For this reason, even when the valve is opened, the discharge lead does not easily come into surface contact with the spring lead and does not adhere easily. For this reason, it is thought that the operation | movement delay of a reed valve can be suppressed.

  On the other hand, in the reed valve of the present invention, the operation delay of the reed valve can be suppressed by providing the stopper side lead member and the spacer member.

  That is, the seating-side lead member in the reed valve of the present invention contacts the stopper-side lead member when the valve is opened, but does not directly contact the stopper member. For this reason, the seating side lead member does not adhere to the stopper member. In addition, since the spacer member is interposed between the seating side lead member and the stopper side lead member, the seating side lead member and the stopper side lead member are not in close contact with each other even when the valve is opened and closed. Absent. For this reason, the seating side lead member is difficult to adhere to the stopper side lead member. Therefore, the reed valve of the present invention can suppress the operation delay.

  Further, since the spacer member is interposed between the seating side lead member and the stopper side lead member, the seating side lead member and the stopper side lead member operate independently of each other. For this reason, even if the seating side lead member vigorously contacts and rebounds when the valve is closed, the stopper side lead member contacts the seating side lead member. In other words, the seating-side lead member is not easily bumped by being pressed by the stopper-side lead member when the valve is closed. Therefore, the seating side lead member can quickly close the inflow port, and the operation delay of the reed valve can be suppressed. Further, it is also possible to suppress the hitting sound when the valve is closed due to flapping of the seating side lead member.

  According to the reed valve of the present invention having the above (1), since the spring constant of the stopper side lead member is equal to or greater than the spring constant of the seating side lead member, the stopper side lead member becomes the seating side lead member when the valve is opened and closed. Work late. For this reason, when the valve is opened, it can abut against the seating-side lead member to sufficiently absorb the impact of the seating-side lead member, and when the valve is closed, the seating-side lead member that abruptly abuts against the valve base and rebounds can be pressed down. Therefore, according to the reed valve of the present invention having the above (1), noise and operation delay can be more reliably suppressed.

  According to the reed valve of the present invention having the above (2), when the seating-side lead member and the stopper-side lead member are press-molded, for example, the press-forming die for the seating-side lead member and the press for the stopper-side lead member There is an advantage that the mold can be shared.

  By providing the reed valve of the present invention described above, the compression apparatus of the present invention can suppress the operation delay of the reed valve and operate efficiently.

It is explanatory drawing which shows typically the compression apparatus and reed valve of embodiment. It is a disassembled perspective view which shows the reed valve of embodiment typically. It is sectional drawing which shows typically the reed valve of embodiment in a natural state. It is explanatory drawing which shows typically a mode that the reed valve of embodiment is opening. It is explanatory drawing which shows typically a mode that the reed valve of embodiment is opening. It is explanatory drawing which shows typically a mode that the reed valve of embodiment is closing. It is explanatory drawing which shows typically a mode that the reed valve of embodiment is closing. It is sectional drawing which shows the other example of the reed valve of this invention typically.

  Hereinafter, the reed valve and the compression device of the present invention will be described with specific examples.

(Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. The compression device shown in FIG. 1 is a compressor for a heat pump, and includes a casing 7, a compression unit 8, a drive unit 9, and two reed valves 1 (first reed valve 10 and second reed valve 11). . In the casing 7, a compression chamber 70, a first valve chamber 71, and a second valve chamber 72 are defined.

  A compression portion 8 having a columnar shaft 80 and a piston 81 integrated with one end portion of the shaft 80 is inserted into the compression chamber 70. The compression unit 8 can slide (reciprocate) in the left-right direction in FIG. 1, and a drive unit 9 that reciprocates the compression unit 8 is attached to the shaft 80 of the compression unit 8. As the compression unit 8 reciprocates, the fluid pressure in the compression chamber 70 changes.

  A part of the partition wall that partitions the first valve chamber 71 constitutes the first valve base 21. The first valve base 21 is formed with a first inlet 22 having a through hole shape. The first inlet 22 communicates the outside of the casing 7 and the first valve chamber 71 (more specifically, via the communication chamber 29 and the communication port 24). A through hole-shaped first outlet 23 is formed in a portion of the partition wall that partitions the first valve chamber 71 facing the first valve base 21. The first outlet 23 communicates the first valve chamber 71 and the compression chamber 70. Therefore, the first valve chamber 71 communicates with the compression chamber 70 and the outside of the casing 7.

  A part of the partition wall that partitions the second valve chamber 72 constitutes the second valve base 31. The second valve base 31 has a through-hole-shaped second inlet 32. The second inflow port 32 communicates the compression chamber 70 and the second valve chamber 72. A through-hole-shaped second outlet 33 is formed in a portion of the partition wall that partitions the second valve chamber 72 and that faces the second valve base 31. The second outlet 33 communicates the second valve chamber 72 and the outside of the casing 7. Therefore, the second valve chamber 72 also communicates with the compression chamber 70 and the outside of the casing 7. The opening end surface of the second inlet 32 on the second valve chamber 72 side is a circle having the same diameter as the opening end surface of the first inlet 22 on the first valve chamber 71 side. A second flow path part 35 is connected to the second outlet 33. The first flow path portion 25 is also connected to the communication port 24. The first flow path portion 25 is connected to the first inflow port 22 through the communication port 24.

  The first reed valve 10 and the second reed valve 11 have the same shape. As shown in FIG. 2, the first reed valve 10 and the second reed valve 11 include a seating side lead member 40, a stopper side lead member 50, a spacer member 60, a stopper member 65, and a bolt 69. The first reed valve 10 is disposed inside the first valve chamber 71 and is fixed to the first valve base 21. The second reed valve 11 is disposed inside the second valve chamber 72 and is fixed to the second valve base 31. Hereinafter, the reed valve 1 of the present invention will be described by taking the first reed valve 10 as an example.

<Reed valve shape>
The seating-side lead member 40 and the stopper-side lead member 50 are press-molded using spring steel (so-called valve material) having a plate thickness of 0.3 mm. The spacer member 60 is press-formed using a rolled steel plate having a thickness of 0.5 mm as a material. As shown in FIG. 2, the seating side lead member 40 and the stopper side lead member 50 have the same shape. Specifically, the seating-side lead member 40 includes a substantially rectangular plate-shaped first fixed portion 41 and a strip-shaped first movable portion 42 continuous with the first fixed portion 41. The distal end portion 43 (that is, the free end) of the first movable portion 42 has a substantially disk shape having a larger outer shape than the opening end surface of the first inflow port 22 and the opening end surface of the second inflow port 32. The plate width of the first movable portion 42 other than the tip portion 43 is smaller than the plate width of the tip portion 43 and the first fixed portion 41. For this reason, the 1st movable part 42 is a shape which is easy to elastically deform. A seating lead fixing hole 45 for fastening a bolt 69 is formed through the first fixing portion 41. The spacer member 60 has substantially the same shape as the first fixing portion 41. A spacer fixing hole 61 for fastening a bolt 69 is formed through the spacer member 60. The stopper side lead member 50 has the same shape as the seating side lead member 40, the second fixed portion 51 having the same shape as the first fixed portion 41, the second movable portion 52 having the same shape as the first movable portion 42, and the tip A tip portion 53 having the same shape as the portion 43. A stopper lead fixing hole 55 having the same shape as the seating lead fixing hole 45 is formed through the second fixing portion 51. The stopper member 65 is made of stainless steel, and the thickness of the stopper member 65 is larger than the thicknesses of the seating side lead member 40 and the stopper side lead member 50. Therefore, the stopper member 65 is less likely to be deformed than the seating side lead member 40 and the stopper side lead member 50. The stopper member 65 has a stopper fixing portion 66 having a rectangular plate shape with a substantially constant plate thickness, and a strip-shaped stopper portion 67 continuing to the stopper fixing portion 66. The surface 65a on the seating-side lead member 40 side of the stopper portion 67 is an inclined surface, and the plate thickness of the stopper portion 67 gradually decreases from the stopper fixing portion 66 side toward the tip. When the seating lead member 40 and the stopper-side lead member 50 are deformed, their cross-sectional shapes substantially coincide with the cross-sectional shape of the surface 65a in FIG. A stopper fixing hole 68 for fastening the bolt 69 is formed through the stopper fixing portion 66.

  As shown in FIGS. 2 and 3, the seating lead fixing hole 45 of the seating side lead member 40, the spacer fixing hole 61 of the spacer member 60, the stopper lead fixing hole 55 of the stopper side lead member 50, and the stopper fixing of the stopper member 65. Bolts 69 are inserted into the holes 68. The seating side lead member 40, the spacer member 60, the stopper side lead member 50 and the stopper member 65 are fastened to the first valve base 21 by bolts 69. At this time, the first movable part 42 of the seating side lead member 40 and the second movable part 52 of the stopper side lead member 50 are elastically deformable. At this time, the distal end portion 43 of the seating-side lead member 40 faces the opening end surface 22a of the first inflow port 22 in the first valve base 21 and elastically contacts the peripheral edge portion of the opening end surface 22a. Therefore, the seating side lead member 40 closes the first inlet 22. The stopper side lead member 50 is disposed substantially parallel to the seating side lead member 40. The distal end portion 53 of the stopper side lead member 50 faces the distal end portion 43 of the seating side lead member 40. Note that the second movable portion 52 of the stopper-side lead member 50 is separated from both the seating-side lead member 40 and the stopper member 65. The surface on the spacer member 60 side of the seating side lead member 40 is referred to as the upper surface 40 a of the seating side lead member 40. The surface on the spacer member 60 side of the stopper-side lead member 50 is referred to as the lower surface 50 a of the stopper-side lead member 50. The surface of the stopper member 65 on the stopper side lead member 50 side is referred to as a lower surface 65 a of the stopper member 65. As shown in FIG. 3, the maximum value of the distance between the upper surface 40 a of the seating-side lead member 40 and the lower surface 50 a of the stopper-side lead member 50 in a natural state, that is, a state where no fluid pressure is applied to the first reed valve 10. (In the embodiment, since the upper surface 40a and the lower surface 50a are parallel, the distance between the upper surface 40a and the lower surface 50a is actually the maximum distance between the upper surface 40a of the seating-side lead member 40 and the lower surface 65a of the stopper member 65). It is about 1/4 of the value. In other words, the distance between the seating side lead member 40 and the stopper side lead member 50 (ie, the plate thickness W1 of the spacer member 60) is about 1/4 of the maximum displacement W2 of the seating side lead member 40.

<Operation of compression device>
Hereinafter, the operation of the compression apparatus of the embodiment will be described.

  When the compression portion 8 is stopped, as shown in FIG. 1, the seating-side lead member 40 of the first reed valve 10 seals the first inflow portion 22 and the seating-side lead member 40 of the second reed valve 11. Seals the second inlet 32.

  When the compression unit 8 shown in FIG. 1 slides to the right in FIG. 1, the fluid pressure in the compression chamber 70 and the fluid pressure in the first valve chamber 71 communicating with the compression chamber 70 become low. Then, the fluid pressure in the compression chamber 70 and the first valve chamber 71 becomes lower than the fluid pressure in the first flow path portion 25, the communication port 24, and the communication chamber 29, and as shown in FIG. The circulating fluid presses the front end portion 43 of the seating side lead member 40 through the first inlet 22. Therefore, the seating-side lead member 40 is elastically deformed in the opening direction, and the fluid flows into the first valve chamber 71 shown in FIG. 1 and further flows into the compression chamber 70 through the first outlet 23. At this time, the fluid pressure at the second inlet 32 also decreases. For this reason, the fluid pressure in the second inlet 32 and the compression chamber 70 becomes lower than the fluid pressure in the second valve chamber 72, and the second seating-side lead member 40 of the second reed valve 11 moves toward the second inlet 32. Sucked. Therefore, the second seating side lead member 40 is in close contact with the peripheral edge portion of the second inlet 32 in the second valve plate 31, and the second inlet 32 remains closed. For this reason, the fluid flowing into the compression chamber 70 at this time does not flow into the second valve chamber 72. Further, since the second reed valve 11 is closed, the fluid existing in the second valve chamber 72 does not flow into the compression chamber 70. The first inlet 22 communicates the outside of the casing 7 (the communication chamber 29 communicating with the first flow path portion 25 in the first embodiment) and the first valve chamber 71, and the first outlet 23 is the first valve. The chamber 71 and the compression chamber 70 are communicated with each other. The first reed valve 10 permits the flow of fluid from the outside of the casing 7 to the first valve chamber 71 and blocks the flow of fluid from the first valve chamber 71 to the outside of the casing 7. For this reason, the first valve chamber 71 is substantially a fluid flow path from the outside of the casing 7 toward the compression chamber 70.

  When the sliding of the compression unit 8 stops, the fluid flows in the direction in which the first reed valve 10 opens (that is, the fluid flows from the outside of the casing 7 through the first valve chamber 71 to the compression chamber 70). Stops. For this reason, the seating-side lead member 40 returns to its original shape due to its own elasticity and closes the first inlet 22. That is, the first reed valve 10 is closed. At this time, the suction force acting on the second seating side lead member 40 of the second reed valve 11 is also reduced, but the second seating side lead member 40 keeps the second inlet 32 closed by its own elasticity. Accordingly, at this time, the fluid in the compression chamber 70 remains in the compression chamber 70.

  When the compression unit 8 slides to the left in FIG. 1, the fluid pressure in the compression chamber 70 increases. For this reason, the fluid in the compression chamber 70 flows into the second inlet 32 and presses the second seating side lead member 40 in the valve opening direction. For this reason, the second seating side lead member 40 is elastically deformed in the valve opening direction, the fluid flows into the second valve chamber 72, and further flows out of the casing 7, that is, to the second flow path portion 35 through the second outlet port 33. To do. At this time, the fluid in the compression chamber 70 also flows into the first valve chamber 71 through the first outlet 23. However, as described above, since the seating-side lead member 40 closes the first inlet 22, the fluid that has flowed into the first valve chamber 71 does not flow out of the casing 7. At this time, the seating side lead member 40 is pressed toward the first inlet 22 by the fluid in the first valve chamber 71. Therefore, the first inlet 22 is strongly sealed by the seating side lead member 40.

  The second inlet 32 communicates the compression chamber 70 and the second valve chamber 72, and the second outlet 33 connects the second valve chamber 72 and the outside of the casing 7 (in the embodiment, the second flow path portion 35). Communicate. The second reed valve 11 permits the flow of fluid from the compression chamber 70 to the second valve chamber 72 and blocks the flow of fluid from the second valve chamber 72 to the compression chamber 70. Therefore, the second valve chamber 72 is substantially a fluid flow path from the compression chamber 70 toward the second flow path portion 35.

  As described above, the first reed valve 10 and the second reed valve 11 are alternately opened and closed, whereby in the compression device of the embodiment, the fluid flow direction is restricted to one direction. That is, the compression device pumps fluid from the first flow path portion 25 to the second flow path portion 35.

<Operation of reed valve 1>
Hereinafter, the reed valve 1 of the present invention will be described by taking the first reed valve 10 as an example.

  As shown in FIG. 4, when the valve is opened, fluid flows into the first valve chamber 71 through the first inlet 22. Since there is a gap due to the spacer 61 between the seating side lead member 40 and the stopper side lead member 50, the fluid pressure of this fluid acts more strongly on the seating side lead member 40 near the first inflow port 22. Therefore, the seating side lead member 40 is first deformed in the opening direction. The stopper-side lead member 50 is pressed by fluid pressure and deformed by being pressed by the deformed seating-side lead member 40. Since the stopper-side lead member 50 is elastically deformable, it receives an impact load from the seating-side lead member 40 and elastically deforms into a shape along the seating-side lead member 40. For this reason, the stopper side lead member 50 and the seating side lead member 40 are in surface contact, and the stopper side lead member 50 absorbs the impact load of the seating side lead member 40. In the embodiment, since the seating side lead member 40 and the stopper side lead member 50 are made of the same spring steel and have the same shape, the deformation speed (valve opening speed) of the seating side lead member 40 is reduced to ½.

  When the seating side lead member 40 abuts against the stopper side lead member 50, as shown in FIG. 5, both the seating side lead member 40 and the stopper side lead member 50 are deformed in the valve opening direction and abut against the stopper member 65. The stopper side lead member 50 in contact with the stopper member 65 is not further deformed, and the seating side lead member 40 in contact with the stopper side lead member 50 is not further deformed. The stopper-side lead member 50 first contacts the seating-side lead member 40 and absorbs the impact load by its own elasticity, so that the impact load received by the stopper member 65 is reduced. For this reason, the hitting sound when the seating side lead member 40 and the stopper side lead member 50 abut against the stopper member 65 is suppressed.

  As shown in FIG. 6, when the valve is closed, the seating side lead member 40 is deformed in the closing direction by its own elasticity. The stopper-side lead member 50 is also deformed in the closing direction by its own elasticity. Since the seating side lead member 40 and the stopper side lead member 50 overlap each other at the start of valve closing, the seating side lead member 40 and the stopper side lead member 50 operate integrally. For this reason, the spring constant of the integrated body of the seating side lead member 40 and the stopper side lead member 50 is twice the spring constant of the seating side lead member 40 alone (and the spring constant of the stopper side lead member 50 alone). In other words, the valve closing speed of this integrated object is slower than when the seating-side lead member 40 operates alone.

  At this time, as described above, the fluid pressure at the first inlet 22 decreases, so that the fluid in the first valve chamber 71 is sucked toward the first inlet 22. This suction force acts on both the seating-side lead member 40 and the stopper-side lead member 50, but acts more strongly on the seating-side lead member 40 near the first inflow port 22. Accordingly, the operation of the seating side lead member 40 is accelerated, and the seating side lead member 40 operates independently from the middle of the valve closing. That is, the seating side lead member 40 contacts the first valve base 21 before the stopper side lead member 50 as shown in FIG. Since the stopper-side lead member 50 operates later than the seating-side lead member 40, the stopper-side lead member 50 abuts on the seating-side lead member 40 (shown by a two-dot chain line in FIG. 7) bounced back against the first valve base 21. The side lead member 40 is prevented from being deformed again in the opening direction. Therefore, the seating-side lead member 40 hardly flutters when the valve is closed, and closes the first inlet 22 quickly. At this time, the stopper-side lead member 50 is sucked toward the first inflow port 22 in the same manner as the seating-side lead member 40, so the first inflow port 22 is closed together with the seating-side lead member 40. The first valve base 21 is located away from the neutral point of the stopper-side lead member 50 (the position where the external stress is not received as shown in FIG. 3, the initial position) toward the seating-side lead member 40. In other words, the stopper-side lead member 50 and the seating-side lead member 40 are separated from each other. For this reason, the valve opening speed of the stopper-side lead member 50 becomes slower due to its own elasticity from the time when the neutral point is exceeded. Therefore, the impact load applied to the first valve base 21 is small, so that the hitting sound when the valve is closed can be suppressed.

  In the reed valve 1 of the embodiment, the stopper-side lead member 50 contacts the stopper member 65, and the seating-side lead member 40 does not directly contact the stopper member 65. For this reason, even if the stopper side lead member 50 adheres to the stopper member 65 and an operation delay occurs in the stopper side lead member 50, the seating side lead member 40 operates normally. For this reason, the operation delay of the entire reed valve 1 hardly occurs.

  Further, since the stopper member 65 has an inclined surface that matches the deformed shape of the stopper-side lead member 50, the contact area between the stopper-side lead member 50 and the stopper member 65 when the valve is opened is large. For this reason, the impact at the time of the collision between the stopper-side lead member 50 and the stopper member 65 can be reduced.

  The reed valve 1 of the embodiment has one seating-side lead member 40 and one stopper-side lead member 50, but the number of stopper-side lead members 50 in the reed valve of the present invention is not limited to this, and two A plurality of the above may be used. In any case, it is sufficient that the stopper-side lead member 50 can suppress the collision load applied by the seating-side lead member 40 to the stopper member 65 when the valve is opened and the fluttering of the seating-side lead member 40 when the valve is closed.

  In the embodiment, the seating side lead member 40 and the stopper side lead member 50 have the same shape, but may have different shapes. The shape and material of the seating-side lead member 40 and the stopper-side lead member 50 can be appropriately selected so that the stopper-side lead member 50 has a spring constant that opens and closes behind the seating-side lead member 40. Further, in the embodiment, the seating side lead member 40 and the stopper side lead member 50 are arranged in parallel, but the seating side lead member 40 and the stopper side lead member 50 may not be parallel. Furthermore, the seating side lead member 40 and the stopper side lead member 50 may be flat plates, and the plate thickness may not be constant. In any case, by providing the stopper-side lead member 50 and the spacer member 60, the collision load applied to the stopper member 65 by the seating-side lead member 40 when the valve is opened, and the seating-side lead member 40 when the valve is closed. Flapping can be suppressed by the stopper-side lead member 50. In any case, the use of a flat plate as the seating side lead member 40 and the stopper side lead member 50 makes it possible to obtain the reed valve 1 that is excellent in durability and can be easily manufactured.

  The distance between the seating-side lead member 40 and the stopper-side lead member 50 (that is, the thickness of the spacer member 60) is not particularly limited, but is preferably ½ or less of the maximum displacement of the seating-side lead member 40. It is preferably 1 mm or more. If the distance between the seating-side lead member 40 and the stopper-side lead member 50 is within this range, the stopper-side lead member 50 and the seating-side lead member 40 will reliably contact each other when the valve is opened, and the stopper-side lead when the valve is closed. The member 50 can suppress the flapping of the seating side lead member 40 with high reliability.

  Seal ribs 28 that protrude toward the seating-side lead member 40 may be formed at the peripheral portions of the inlets 22 and 32 in the valve bases 21 and 31. For example, as shown in FIG. 8, by providing the seal rib 28, the seating side lead member 40 elastically contacts the valve bases 21 and 31 when the valve is closed. For this reason, the sealing performance of the reed valve 1 is further improved.

(Other)
The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope not departing from the gist. For example, the reed valve 1 of the present invention may be used for applications other than the compression device, and the compression device of the present invention may include three or more reed valves 1.

  The compression apparatus of the present invention can be preferably used as a compression apparatus that constitutes a part of a heat pump used in a refrigeration apparatus, a refrigeration apparatus, an air conditioner, or the like. The reed valve of the present invention can be preferably used as a reed valve for these compression devices.

  1 is a reed valve, 7 is a casing, 8 is a compression unit, 9 is a drive unit, 21 is a first valve base (valve base), 22 is a first inlet (inlet), 31 is a second valve base (valve base) ), 32 is a second inlet (inlet), 40 is a seating side lead member, 41 is a first fixing portion, 42 is a first movable portion, 50 is a stopper side lead member, 51 is a second fixing portion, and 52 is The second movable portion, 60 is a spacer member, 65 is a stopper member, 70 is a compression chamber, 71 is a first valve chamber, and 72 is a second valve chamber.

Claims (5)

A reed valve attached to a valve base having an inflow port having a through hole shape,
A seating-side lead member that has a flat plate shape, is elastically deformable, and has a first fixed portion that can be fixed to the valve base, and a first movable portion that is continuous with the first fixed portion and can open and close the inlet. When,
A spacer member overlaid on the first fixed portion of the seating side lead member;
A second fixed portion that is formed in a flat plate shape and is elastically deformable and is stacked on the spacer member; and a second movable portion that is continuous with the second fixed portion and faces the first movable portion while being spaced apart from the first movable portion. A stopper side lead member having,
A reed valve comprising: a stopper member superimposed on the stopper-side lead member.   The reed valve according to claim 1, wherein a spring constant of the stopper side lead member is equal to or greater than a spring constant of the seating side lead member.   The reed valve according to claim 1 or 2, wherein the seating side lead member and the stopper side lead member have the same shape. A reed valve attached to a valve base having an inflow port having a through hole shape,
A seating-side lead member that has a flat plate shape, is elastically deformable, and has a first fixed portion that can be fixed to the valve base, and a first movable portion that is continuous with the first fixed portion and can open and close the inlet. When,
A second fixing portion provided on the opposite side of the valve base so as to face the seating-side lead member, having a flat plate shape and elastically deformable, is continuous with the second fixing portion. A stopper-side lead member having a second movable portion facing the first movable portion while being spaced apart from the first movable portion;
And a stopper member provided on the opposite side of the seating-side lead member and facing the stopper-side lead member. Reed valve according to any one of claims 1 to 4,
A compression chamber; a first valve chamber that communicates with the compression chamber to form a fluid inflow path from the outside toward the compression chamber; and an outflow of the fluid that communicates with the compression chamber from the compression chamber toward the outside. A casing having a second valve chamber constituting a path;
A compression unit that is disposed in the compression chamber and changes the pressure in the compression chamber by moving in the compression chamber;
A drive unit that drives the compression unit,
A part of the partition wall that partitions the first valve chamber forms a first valve base having a first inlet that serves as a flow path for the fluid from the outside toward the first valve chamber. And
A part of the partition wall defining the second valve chamber has a second valve base having a second inlet that serves as a flow path for the fluid from the compression chamber toward the second valve chamber. Configure
One reed valve is fixed to each of the first valve base and the second valve base.

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