JP2006046171A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor capable of being made stably and highly efficient by preventing the energy efficiency from varying. <P>SOLUTION: A spacer 143 is sandwiched between a discharge lead 142 and a spring lead 144 in a discharge valve device 123 formed in a valve plate 120 so that the opening characteristic of the discharge lead 142 can be adjusted with the thickness of the spacer 143. Since the closing delay due to adsorption on the spring lead 144 can be prevented, the compressor can be made stably and highly efficient. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a compressor used in a refrigerator or the like, and more particularly to an improvement in a discharge valve device provided in a refrigerant gas discharge path.

  As a conventional compressor, there is a compressor provided with a discharge valve device that improves energy efficiency by reducing noise during opening and closing of the discharge lead while reducing noise during operation (see, for example, Patent Document 1). ).

  The conventional compressor will be described below with reference to the drawings.

  FIG. 4 is a cross-sectional view of a conventional compressor, and FIG. 5 is a cross-sectional view of a discharge valve device of a conventional compressor. 4 and 5, the hermetic container 1 contains a compression element 2 and an electric element 3 that drives the compression element 2, and refrigerating machine oil 4 is stored at the bottom.

  The compression element 2 and the electric element 3 are elastically supported inside the sealed container 1 via a support device 5.

  The compression element 2 includes a cylinder block 7 that forms a substantially cylindrical cylinder 6, a piston 8 that reciprocates within the cylinder 6, a suction lead 9 that is attached to the open end of the cylinder 6, a valve plate 10, and a cylinder head. 11 is provided.

  The plate-shaped valve plate 10 includes a discharge valve device 15 formed in the suction hole 12 and the recess 14 on the side opposite to the cylinder 6.

  The discharge valve device 15 includes a discharge hole 16 communicating with the inside of the cylinder 6, a valve seat portion 17 provided outside the discharge hole 16, a discharge lead 18, a spring lead 19, and a stopper 20. Further, a pedestal portion 21 is disposed in the recess 14 on the same plane as the valve seat portion 17.

  The discharge lead 18 has an opening / closing part 22 that opens and closes the opening of the discharge hole 16.

  The spring lead 19 is disposed on the side of the discharge lead 18 opposite to the cylinder 6 of the valve plate 10, and is bent to the side opposite to the opening / closing portion 22 at the spring lead bent portion 23 so as to have a gap with respect to the opening / closing portion 22. .

  The stopper 20 is disposed on the anti-discharge lead 18 side of the spring lead 19 and has at least two substantially parallel portions 24 on the anti-cylinder 6 side of the valve plate 10 with respect to the plane including the valve seat portion 17 and the base portion 21. The spring lead 19 is disposed at a position corresponding to the opening / closing part 22 so as to have a gap. The discharge lead 18, the spring lead 19, the stopper 20, and the valve plate 10 are clamped and fixed by a rivet 25 at the pedestal portion 21.

  The operation of the compressor configured as described above will be described below.

  A refrigerant (not shown) sucked from the suction hole 12 is compressed by the piston 8 reciprocating in the cylinder 6 and is discharged from the discharge hole 16 provided in the discharge valve device 15 to have a compression operation. Yes.

By securing the space height at the free ends of the discharge lead 18 and the spring lead 19, pressure loss when the discharge lead 18 is opened is prevented, and the space height of the spring lead 19 relative to the discharge lead 18 is reduced. The opening amount of the discharge lead 18 can be regulated by adjusting the amount of bending. In addition to these, by providing the stopper 20 with two or more substantially parallel portions 24 with respect to the plane including the valve seat portion 17 and the pedestal portion 21, the spatial height of the stopper 20 with respect to the discharge lead 18 can be easily managed. It is.
JP 2002-195160 A

  However, in the above-described conventional configuration, the bending amount of the spring lead 19 is set for each of the different refrigerants in order to improve the energy efficiency of the compressor. Therefore, there is a possibility that the energy efficiency varies due to the variation in the bending amount. It had the problem that.

  Further, since the valve plate 10, the discharge lead 18, the spring lead 19, and the stopper 20 are fixed in a cantilever manner on the pedestal portion 21, the valve plate 10, the discharge lead 18, the spring lead 19, and the stopper 20 are rivets 25 on the pedestal portion 21. When the clamping force of the rivet 25 is strong when the rivet 25 is clamped and fixed, etc., the discharge lead 18 is excessively pressed by the pedestal portion 21, and the opening / closing portion 22 is lifted from the valve seat portion 17, and the discharge lead 18 and the valve seat portion 17 had the subject that sealing performance with 17 might fall.

  Furthermore, when the discharge lead 18 is opened, the discharge lead 18 comes into contact with the spring lead 19, and the refrigerating machine oil 4 interposed between the discharge lead 18 and the spring lead 19 may cause a delay in closing the discharge lead 18. Was.

  The present invention solves the above-described conventional problems, and stabilizes the space height with respect to the discharge lead at the free end of the spring lead, reduces the delay in closing the discharge lead, and provides a stable and highly energy efficient compressor. For the purpose.

  In order to solve the above-described conventional problems, the compressor of the present invention includes a spacer sandwiched between the discharge lead and the spring lead, and the discharge lead, the stopper, the spring lead, and the spacer at the pedestal portion. By obtaining the space height of the spring lead with respect to the discharge lead when fixed, the variation in space height can be reduced, and the discharge lead and the spring lead have a gap from the position of the spacer. It has the effect of hardly causing adsorption by oil.

  Since the compressor of the present invention can reduce the variation in space height and hardly cause adsorption by oil, it is possible to reduce the delay in closing the discharge lead and stably improve the efficiency.

  The invention according to claim 1 contains a compression element and refrigerating machine oil in an airtight container, and the compression element includes a piston, a cylinder in which the piston reciprocates, a valve plate attached to an open end of the cylinder, A discharge valve device formed on an opposite cylinder side of the valve plate, the discharge valve device communicating with the cylinder, a valve seat portion provided outside the discharge hole, and the valve seat portion And a pedestal formed on substantially the same plane as the valve plate, a discharge lead formed from a leaf spring material for opening and closing the valve seat, a stopper for restricting the movement of the discharge lead, and a leaf spring material A spring lead formed between the discharge lead and the stopper is fixed to the pedestal portion, and is sandwiched between the discharge lead and the spring lead. The space height of the spring lead with respect to the discharge lead is obtained by the spacer thickness when the discharge lead, stopper, spring lead and spacer are fixed on the base. Since the discharge lead and spring lead have a gap from the position of the spacer, it is difficult for the oil to be adsorbed by oil, so the delay in closing the discharge lead can be reduced, and high efficiency can be achieved stably. .

  The invention according to claim 2 is the invention according to claim 1, wherein the discharge lead, the stopper, the spring lead, and the spacer are clamped and fixed to the pedestal portion with rivets, and the discharge lead, the stopper, the spring lead, and the spacer are fixed. Since it can be easily fixed to the pedestal portion, in addition to the effect of the invention described in claim 1, it can be assembled at low cost and easily.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the spacer has substantially the same Young's modulus as the discharge lead and the spring lead. When fixing to the pedestal, the deformation allowance of the discharge lead and the spring lead is substantially the same, the relative distance between the discharge lead and the spring lead is hardly changed, in addition to the effect of the invention according to claim 1 or 2, The space height of the spring lead with respect to the discharge lead can be further stabilized.

  The invention according to claim 4 is the invention according to claim 3, wherein the spacer is formed of a leaf spring material, and polishing of both sides of the spacer is not required. In addition to the effects of the invention, it is possible to prevent an increase in cost.

  The invention according to claim 5 is the invention according to claim 1 or 2, wherein the discharge lead is formed by bending the opening / closing part side for opening and closing the valve seat part to the valve seat part side at the discharge lead bent part. When the discharge lead is fixed on the pedestal, the force that presses the opening / closing part against the valve seat works, preventing the opening / closing part from floating from the valve seat and improving the sealing performance between the discharge lead and the valve seat In addition to the effects of the invention described in claim 1 or 2, it is possible to further suppress the reduction of the refrigerating capacity and achieve high efficiency.

  The invention according to claim 6 is the invention according to claim 5, wherein the discharge lead bent portion is positioned in a relief portion formed between the valve seat portion and the pedestal portion. In addition to the effect of the invention of claim 5, the sealing performance between the discharge lead and the valve seat portion can be obtained with certainty, since the pressing force always acts on the valve seat portion according to the set value. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of a compressor according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a discharge valve device of the compressor according to the same embodiment, and FIG. 3 is a view of the discharge valve device of the compressor according to the same embodiment. It is an exploded view.

  1 to 3, a sealed container 101 that forms a sealed space accommodates a compression element 102 and an electric element 103 that drives the compression element 102, and stores refrigerating machine oil 104 at the bottom.

  The compression element 102 and the electric element 103 are elastically supported inside the sealed container 101 via a support device 105. A refrigerant 106 is sealed in the space of the sealed container 101. The refrigerant 106 is preferably a refrigerant other than a specific chlorofluorocarbon target corresponding to environmental problems in recent years, such as R134a or a natural refrigerant R600a. The electric element 103 includes a stator 107 and a rotor 108.

  Next, the compression element 102 will be described.

  A support body 112 that supports a crankshaft 111 is fixed to a cylinder block 110 that forms the cylinder 109. The crankshaft 111 includes a main shaft portion 113 and an eccentric portion 114, and a rotor 108 is fitted to the main shaft portion 113.

  A piston 115 is housed in the cylinder 109, and the piston 115 and the eccentric portion 114 are connected by a connecting means 116.

  An oil supply pipe 117 that supplies the refrigerating machine oil 104 to each sliding part of the compression element 102 by centrifugal force is installed at the lower end of the eccentric part 114.

  The valve plate 120 disposed so as to seal the opening end of the cylinder 109 is made of a sintered alloy or the like, and is provided with a suction hole 122 that communicates with the cylinder 109 by opening and closing the suction lead 121 and is discharged to the side of the non-cylinder 109. A recess 124 that forms the valve device 123 and a discharge hole 128 that communicates with the cylinder 109 are provided at the bottom of the recess 124.

  The cylinder head 126 is disposed on the side opposite to the cylinder 109 of the valve plate 120 and forms a high-pressure chamber 125 that contains the discharge valve device 123.

  The suction lead 121 is made of a leaf spring material, and a reed valve 127 that opens and closes the opening of the suction hole 122 is formed by a notch. The suction lead 121 is provided with a notch 129 that escapes the discharge hole 128.

  A suction muffler 132 that forms a silencing space (not shown) is molded of a resin such as PBT, and one end communicates with the space inside the sealed container 101 and the other end communicates with the suction hole 122.

  The suction lead 121, the valve plate 120, the cylinder head 126 forming the high pressure chamber 125, and the suction muffler 132 are fastened and fixed to the cylinder block 110 by bolts or the like.

  Next, the discharge valve device 123 will be described.

  A valve seat part 134 formed so as to surround the discharge hole 128 is provided in the recess 124 of the valve plate 120, and a pedestal part 138 having a valve plate rivet hole 136 is formed on the same plane as the valve seat part 134. A clearance 140 that is deeper than the pedestal 138 is formed between the valve seat 134 and the pedestal 138.

  The discharge lead 142, the spacer 143, the spring lead 144, and the stopper 146 are sandwiched and fixed to the pedestal portion 138 by rivets 147 in this order.

  The discharge lead 142 is made of a tongue-shaped leaf spring material, and an opening / closing portion 148 for opening and closing the opening of the discharge hole 128 is formed at one end, and a discharge lead holding portion 150 fixed to the pedestal portion 138 is formed at the other end. Discharge lead rivet holes 151 are provided. The discharge lead 142 is bent at the opening / closing portion 148 side at the valve seat portion 134 side at the discharge lead bent portion 152. The discharge lead bent portion 152 is formed at an arbitrary position corresponding to the escape portion 140, and the bending angle at the discharge lead bent portion 152 is preferably in the range of 1 to 15 degrees.

  The spring lead 144 is made of a tongue-shaped leaf spring material. A spring lead free end 156 is formed at one end, a spring lead holding portion 158 fixed to the pedestal portion 138 is formed at the other end, and a spring lead rivet hole 159 is formed. Provided.

  The spacer 143 is made of a ring-shaped leaf spring material and includes a spacer rivet hole 160. The number and thickness of the spacers 143 are adjusted so as to form a predetermined gap between the spring lead free end 156 and the opening / closing portion 148 of the discharge lead 142.

  The stopper 146 includes a stopper portion 161 that restricts the movement of the discharge lead 142 with a predetermined gap from the opening / closing portion 148 of the discharge lead 142, and a stopper holding portion 164 that includes a stopper rivet hole 162 and is fixed to the pedestal portion 138. A side surface of the discharge lead 142 of the stopper portion 161 is formed substantially parallel to a plane including the valve seat portion 134 and the pedestal portion 138.

  The stopper holding portion 164 is a discharge lead rivet hole at a position corresponding to the valve plate rivet hole 136 of the base portion 138 provided in the recess 124 of the valve plate 120 together with the discharge lead holding portion 150, the spring lead holding portion 158, and the spacer 143. 151, the spring lead rivet hole 159, the spacer rivet hole 160, and the stopper rivet hole 162 are assembled by caulking the rivet 147.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When electric power is supplied to the stator 107, the crankshaft 111 rotates together with the rotor 108, and the eccentric movement of the eccentric portion 114 releases the connecting means 116 to reciprocate the piston 115 in the cylinder 109. In response to the reciprocation of the piston 115, the refrigerant 106 in the sealed container 101 that has returned from the cooling system (not shown) in the suction stroke pushes the suction lead 121 through the suction muffler 132 and passes through the suction hole 122. It is sucked into the cylinder 109. The sucked refrigerant 106 is compressed in the cylinder 109 in the compression stroke, pushes the discharge lead 142 open and is discharged from the discharge hole 128 to the high pressure chamber 125 formed in the cylinder head 126, and then a cooling system (not shown). Is discharged.

  In addition, the oil supply pipe 117 rotates with the rotation of the crankshaft 111, and the refrigerating machine oil 104 is supplied to each sliding portion of the compression element 102, the discharge valve device 123, and the like by centrifugal force.

  The opening / closing portion 148 of the discharge lead 142 is closed in the suction stroke to seal the valve seat portion 134, and is opened when the pressure in the cylinder 109 is increased in the compression stroke, thereby discharging the refrigerant 106 to the high pressure chamber 125.

  The spring lead free end 156 forms a gap corresponding to the total plate thickness of the opening / closing portion 148 of the discharge lead 142 and the spacer 143, and forms a predetermined gap with respect to the stopper 146. Therefore, the discharge lead 142 has a two-stage characteristic that the rigidity is low until it hits the spring lead 144 and becomes high after it hits, and the discharge lead 142 does not deteriorate the responsiveness and the discharge lead 142 has a low circulation rate. It is easy to open and high compression efficiency can be obtained.

  Here, in order to stabilize the two-stage characteristics of the discharge lead 142, the gap management between the spring lead free end 156 and the opening / closing part 148 is very important. According to the present embodiment, since the spacer 143 is formed of a leaf spring material, the Young's modulus is the same as that of the discharge lead 142 and the spring lead 144, and the rivet 147 narrows the discharge lead, the spacer, and the spring lead to the base portion. When holding and fixing, the deformation allowance of the discharge lead and the spring lead is substantially the same. As a result, the relative distance between the discharge lead and the spring lead hardly changes, and the space height of the spring lead with respect to the discharge lead can be further stabilized, so that high compression efficiency can be stably obtained.

  Even if the fixing with the rivet 147 is used, some deformation of the discharge lead and the spring lead can be allowed, and an inexpensive and simple assembly is possible.

  Further, the angle formed between the discharge lead 142 and the spring lead 144 when the discharge lead 142 hits the spring lead 144 is increased, and the tip of the opening / closing portion 148 of the discharge lead 142 and the spring lead 144 are in point contact. It is possible to reduce the sticking phenomenon caused by the inclusion of the refrigerating machine oil 104 and the like, which occurs when the lead 142 and the spring lead 144 are close to surface contact, and the response of the discharge lead 142 is improved and the closing delay is reduced. Will increase.

  Further, as shown in FIG. 2, the discharge lead 142 is bent at the opening / closing portion 148 side at the valve seat portion 134 side at the discharge lead bent portion 152, so that a force pressing the opening / closing portion 148 against the valve seat portion 134 acts. Therefore, floating from the valve seat part 134 while the discharge lead 142 is closed can be prevented. As a result, since the amount of the high-pressure refrigerant 106 that flows back into the cylinder 109 from the high-pressure chamber 125 of the cylinder head 126 during the suction stroke is reduced, high volume efficiency can be obtained.

  Further, by positioning the discharge lead bent portion 152 of the discharge lead 142 in the escape portion 140, the discharge lead bent portion 152 is fixed to the base portion 138, the spring lead holding portion 158, the spacer, and the stopper when the discharge lead 142 is fixed. Since it can be prevented from being pressed by the holding portion 164, the amount of inclination of the discharge lead 142 can be stabilized. As a result, the pressing force according to the set value acts on the valve seat portion 134, so that the sealing performance between the discharge lead 142 and the valve seat portion 134 can be obtained more reliably.

  As described above, according to the present embodiment, a compressor having high energy efficiency can be realized stably.

  As described above, since the compressor according to the present invention can stably improve the efficiency by suppressing the variation in energy efficiency, it can be applied to applications such as a refrigeration showcase and a dehumidifier.

Sectional drawing of the compressor in Embodiment 1 of this invention Sectional drawing of the discharge valve apparatus of the compressor in the embodiment Exploded view of the discharge valve device of the compressor in the same embodiment Cross section of a conventional compressor Sectional view of a discharge valve device in a conventional compressor

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Airtight container 102 Compression element 104 Refrigerating machine oil 109 Cylinder 115 Piston 120 Valve plate 123 Discharge valve apparatus 128 Discharge hole 134 Valve seat part 138 Base part 140 Escape part 142 Discharge lead 143 Spacer 144 Spring lead 146 Stopper 147 Rivet 148 Opening / closing part 152 Discharge Lead bending part

Claims (6)

  A compression element and refrigerating machine oil are accommodated in a sealed container, and the compression element is formed on the side opposite to the cylinder of the valve plate, a piston, a cylinder in which the piston reciprocates, a valve plate attached to the opening end of the cylinder, and The discharge valve device includes a discharge hole communicating with the cylinder, a valve seat portion provided outside the discharge hole, and a base formed on substantially the same plane as the valve seat portion. A discharge lead that is formed from a leaf spring material and that opens and closes the valve seat portion, a stopper that restricts the movement of the discharge lead, and a discharge spring that is formed from a leaf spring material. A spring lead that is sandwiched between the discharge lead and the spring lead, and a spring lead that is sandwiched between the discharge lead and the spring lead. Machine.   The compressor according to claim 1, wherein the discharge lead, the stopper, the spring lead, and the spacer are clamped and fixed to the pedestal portion with rivets.   The compressor according to claim 1, wherein the spacer has substantially the same Young's modulus as the discharge lead.   The compressor according to claim 3, wherein the spacer is formed of a leaf spring material.   The compressor according to claim 1 or 2, wherein the discharge lead is bent at the opening / closing portion side for opening and closing the valve seat portion toward the valve seat portion at the discharge lead bent portion.   The compressor according to claim 5, wherein the discharge lead bent portion is positioned in a relief portion formed between the valve seat portion and the pedestal portion.

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