Abstract:
A cylinder head for reciprocating compressor comprises a frame including a insertion groove unit so as to make a concentric circle with a through hole penetrated in the body unit; a cylinder in which a cylinder body unit and a flange unit is coupled so as to be located at the through hole of the frame and the insertion groove unit respectively; a discharge cover in which the flange unit formed in the plenum unit is contacted on the step surface of the frame insertion groove; a plurality of volts connected to the step surface; and a valve body for switching the compressing space in the cylinder, thereby the assembling process of components can be simplified and productivity of the assembly can be increased by raising assembling accuracy.

Description:
TECHNICAL FIELD  
         [0001]    The present invention relates to a cylinder head for a reciprocating compressor, and in particular to a cylinder head for a reciprocating compressor which is capable of easily combining construction parts, precisely adjusting an assembly air gap, minimizing leakage of gas compressed in a cylinder and sufficiently cooling heat generated in a compression process.  
         BACKGROUND ART  
         [0002]    Generally, a compressor is for compressing a fluid. The compressor can be divided into a rotation compressor, a reciprocating compressor and a scroll compressor, etc. according to fluid compression types. The compressor consists of a sealed container; a motor part installed inside the sealed container and generating a driving force; and a compression part receiving the driving force of the motor part and compressing gas.  
           [0003]    In the compressor, when power is applied, the motor is operated and generates a driving force, the driving force is transmitted to the compression part, and accordingly the compression part sucks, compresses and discharges gas.  
           [0004]    [0004]FIG. 1 is a longitudinal sectional view illustrating the compression part of the conventional compressor. As depicted in FIG. 1, the compression part of the compressor includes a frame  10  having a through hole  11 ; a cylinder  20  having an internal compression space  21  and combined with the through hole  11  of the frame  10 ; a piston  30  having a cylindrical shape, inserted into the compression space  21  and connected to the motor part; a discharge cover  40  for covering the compression space  21  of the cylinder  20 ; a discharge valve  50  inserted into the discharge cover  40  and opening/closing the compression space  21  of the cylinder  20  by a pressure difference; and a valve spring  51  inserted into the discharge cover  40  and supporting the discharge valve  50 .  
           [0005]    The discharge cover  40  and the cylinder  20  are combined with the frame  10  by plural bolts  60 .  
           [0006]    The frame  10  includes a body part  12  having a certain shape; a plate portion  13  extended from a certain side of the body part  12  so as to have a certain size; a through hole  11  formed at the body part  12 ; and plural screw holes  14  formed at the plate portion  13 .  
           [0007]    The cylinder  20  includes a cylinder body  22  having an outer diameter corresponded to that of the through hole  11  of the frame  10  and a certain length; a flange portion  23  extended from the end of the cylinder body  22  so as to be the same plane as that of the cylinder body  22  and having a certain thickness and width; a compression space  21  formed inside the cylinder body  22  so as to have a certain inner diameter; and plural combining holes  24  formed at the flange portion  23 .  
           [0008]    The discharge cover  40  includes a plenum portion  41  having a cap shape to have a certain inner space; a flange portion  42  curved-extended from the plenum portion  41  so as to have a certain width; a discharge hole  43  formed at a certain side of the plenum portion  41 ; and plural combining holes  44  formed at the flange portion  42 .  
           [0009]    A discharge pipe (not shown) for discharging gas is combined with the discharge hole  43  of the discharge cover  40 .  
           [0010]    First, the body  22  of the cylinder  20  is inserted into the through hole  11  of the frame  10 , the flange portion  23  of the cylinder  20  contacts to a certain surface of the plate portion  13  of the frame  10 , and accordingly the cylinder  20  is combined with the frame  10 .  
           [0011]    And, when the discharge valve  50  and the valve spring  51  are inserted into the inner space of the plenum portion  41  of the discharge cover  40 , to make the discharge cover  40  cover the compression space  21  of the cylinder  20 , the flange portion  42  of the discharge cover  40  is contacted to the flange portion  23  of the cylinder  20 .  
           [0012]    Herein, the discharge valve  50  placed inside the discharge cover  40  blocks the compression space  21  of the cylinder  20  by being elastically supported by the valve spring  51 .  
           [0013]    And, the combining hole  24  of the cylinder  20  and the combining hole  44  of the discharge cover  40  respectively coincide with the screw hole  14  of the frame  10 , the bolt  60  is respectively fastened to the coincided screw hole  14  and the combining holes  24 ,  44 , and accordingly the cylinder  20  and the discharge cover  40  are fixedly combined with the frame  10 .  
           [0014]    The operation of the compression part of the conventional compressor will be described.  
           [0015]    First, when the driving force of the motor part is transmitted to the piston  30 , the piston  30  performs a linear reciprocating motion in the compression space  21  of the cylinder  20 .  
           [0016]    According to the linear reciprocating motion of the piston  30 , the discharge valve  50  sucks, compresses and discharges gas by opening/closing the compression space  21  of the cylinder  20 .  
           [0017]    The high temperature-high pressure gas discharged from the compression space  21  of the cylinder  20  passes the inner space of the plenum portion  41  of the discharge cover  50  and is discharged to the outside through the discharge hole  43  and the discharge pipe combined with the discharge hole  43 .  
           [0018]    However, in the compression part of the conventional compressor, in combining of the cylinder  20  and the discharge cover  40  with the frame  10 , because the combining hole  24  of the cylinder  20  and the combining hole  44  of the discharge cover  40  are respectively combined with the screw hole  14  of the frame  10  by the bolts  60 , the assembly process of those parts are intricate. In addition, it is difficult to coincide the center of the compression space  21  of the cylinder  20  with the inner space center of the plenum portion  41  of the discharge cover  40 .  
           [0019]    And, due to a fabrication error in surface-processing of the flange portion  41  of the discharge cover  40  and the flange portion  23  of the cylinder  20 , a gap may occur between the flange portion  41  of the discharge cover  40  and the flange portion  23  of the cylinder  20 , in that case, the high temperature-high pressure gas discharged from the compression space  21  of the cylinder  20  may leak through the gap between the flange portion  41  of the discharge cover  40  and the flange portion  23  of the cylinder  20 .  
           [0020]    And, while compressing and discharging the gas in the compression space  21  of the cylinder  20 , because high temperature heat generated at the discharge side of the cylinder  20  can not be sufficiently cooled, construction parts may be deformed.  
           [0021]    Technical Gist of the Pesent Invention  
           [0022]    In order to solve the above-described problems, it is an object of the present invention to provide a cylinder head for a reciprocating compressor which is capable of easily combining a cylinder with a discharge cover and precisely adjusting an assembly air gap. It is another object of the present invention to provide a cylinder head for a reciprocating compressor which is capable of minimizing leakage of gas compressed in a cylinder and sufficiently cooling heat generated in a compression process.  
           [0023]    In order to achieve the above-mentioned objects, a cylinder head for a reciprocating compressor comprises a cylinder including a ring-shaped protrusion formed at a certain side of a cylinder body having an internal compression space so as to have a certain width and a height; a discharge cover including an inner space having an inner diameter corresponded to an outer diameter of the ring-shaped protrusion and covering the compression space of the cylinder by combining the inner space with the ring-shaped protrusion of the cylinder; and a valve body inserted into the inner space of the discharge cover and opening/closing the compression space of the cylinder.  
           [0024]    A cylinder head for a reciprocating compressor comprises a frame including a through hole formed at a certain-shaped frame body and an insertion groove having a certain diameter and a depth so as to be a concentric circle with the through hole; a cylinder including a flange portion formed at a certain end of a cylinder body having an internal compression space so as to have a certain area, wherein the cylinder body and the flange portion respectively combine with the through hole and the insertion groove of the frame; a discharge cover including a flange portion curved-extended from a cap-shaped plenum portion having a certain inner space so as to have a, size corresponded to the inner diameter of the insertion groove of the frame and covering the compression space of the cylinder by inserting the flange portion into the insertion groove of the frame; and a valve body inserted into the plenum portion of the discharge cover and opening/closing the compression space of the cylinder.  
           [0025]    A cylinder head for a reciprocating compressor comprises a frame including a plate portion extended from a certain-shaped frame body so as to have a certain size, a through hole formed at the body and an insertion groove formed at a certain side of the body so as to be a concentric circle of the through hole; a cylinder including a flange portion formed at a certain end of a cylinder body having an internal compression space, a ring-shaped protrusion formed at a certain side of the cylinder body so as to have a certain width and a height, wherein the cylinder body and the flange portion respectively combine with the through hole and the insertion groove of the frame; a discharge cover including a cap-shaped plenum portion having an inner diameter corresponded to an outer diameter of the ring-shaped protrusion, a flange portion curved-extended from the end of the plenum portion so as to have a certain size, wherein the inner diameter of the flange portion is inserted into the ring-shaped protrusion and the flange portion contacts to a step surface of the insertion groove of the frame; plural bolts for combining the flange portion of the discharge cover with the frame body; and a valve body inserted into the plenum portion of the discharge cover and opening/closing the compression space of the cylinder. 
       
    
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0026]    The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.  
         [0027]    In the drawings:  
         [0028]    [0028]FIG. 1 is a longitudinal sectional view illustrating a compression part of the conventional compressor;  
         [0029]    [0029]FIG. 2 is a longitudinal sectional view illustrating an embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention;  
         [0030]    [0030]FIG. 3 is a longitudinal sectional view illustrating another embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention;  
         [0031]    [0031]FIG. 4 is a longitudinal sectional view illustrating yet another embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention;  
         [0032]    [0032]FIG. 5 is a longitudinal sectional view illustrating a modified embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention; and  
         [0033]    [0033]FIG. 6 is a longitudinal sectional view illustrating a modified embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention; 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0034]    Hereinafter, the preferred embodiments of the present invention will be described with reference to accompanying drawings.  
         [0035]    [0035]FIG. 2 is a longitudinal sectional view illustrating an embodiment of a cylinder head for a reciprocating compressor in accordance with the present invention. As depicted in FIG. 2, the embodiment of the cylinder head for the reciprocating compressor in accordance with the present invention includes a cylinder  110  having a flange portion  113  extended from the end of a cylinder body  112  having an inner compression space  11  to have a certain area and a ring-shaped protrusion portion  114  at a certain side of the cylinder body  112  so as to have a certain width and a height; a discharge cover  120  having a cap-shaped plenum portion  121  having the inner diameter corresponded to the outer diameter of the protrusion portion  114 , a flange portion  122  curved-extended so to have a certain area and covering the inner space of the cylinder  110  by combining the inner diameter of the plenum portion  121  with the protrusion portion  114  of the cylinder  110 ; and a valve body  150  inserted into the plenum portion  121  of the discharge cover  120  and opening/closing the compression space  111  of the cylinder  110 .  
         [0036]    The compression space  111  of the cylinder  110  consists of a through hole having a certain inner diameter to receive the cylindrical piston  30 , outer diameters of the compression space  111  and the protrusion portion  114  are concentric circles.  
         [0037]    The inner circumferences of the protrusion portion  114  and the compression space  111  are concentric circles. In a modified embodiment, the inner circumference of the protrusion portion may not coincide with that of the compression space.  
         [0038]    And, a reinforcing rib  105  for reinforcing strength is formed at a portion at which the body  101  meets the plate portion  102  of the frame  100 .  
         [0039]    The plenum portion  121  of the discharge cover  120  has a circular inner space having a certain open side, the inner diameter of the inner space is the same as the outer diameter of the protrusion portion  114  of the cylinder  110 , and a discharge hole  123  is formed at a certain side of the plenum portion  121 .  
         [0040]    The valve body  150  consists of a discharge value  151  for opening/closing the compression space  111  of the cylinder  110  and a valve spring  152  for elastically supporting the discharge valve  151 .  
         [0041]    The cylinder  110  and the discharge value  120  are fixedly combined with the frame  100  by fastening means (not shown), and a piston  30  connected to the motion part is inserted into the compression space  111  of the cylinder  110 . The fastening means can be welding or bolting, etc.  
         [0042]    In addition, as depicted in FIG. 3, another embodiment of the cylinder head of the compressor in accordance with the present invention includes a frame  200  having a plate portion  202  extended from a certain end of a body  201  so as to have a certain area, a through hole  203  formed at the body  201  and an insertion groove  204  having a certain diameter and a depth to be a concentric circle of the through hole  203 ; a cylinder  210  including a flange portion  213  formed at a certain end of a cylinder body  212  having an inner compression space  211  so as to have a certain area, wherein the cylinder body  221  and the flange portion  213  respectively combine with the through hole  203  and the insertion groove  204  of the frame  200 ; a discharge cover  220  including a flange portion  222  curved-extended from a cap-shaped plenum portion  221  having a certain inner space so as to have a size corresponded to the inner diameter of the insertion groove  204  of the frame  200  and covering the compression space  211  of the cylinder  210  by inserting the flange portion  222  into the insertion groove  204  of the frame  200 ; and a valve body  250  inserted into the plenum portion  221  of the discharge cover  220  and opening/closing the compression space  211  of the cylinder  210 .  
         [0043]    The plate portion  202  of the frame  200  has the same plane as a certain plane of the frame body  201 , the inner diameter of the frame insertion groove  204  is greater than that of the through hole  203 , and the frame insertion groove  204  is formed at a certain side of the frame body  201  at which the plate portion  202  is formed.  
         [0044]    A reinforcing rib  205  for reinforcing strength is formed at a portion at which the body  201  meets the plate portion  202  of the frame  200 . The outer diameter of the body  212  of the cylinder  210  is the same as the inner diameter of the through hole  203  of the frame  200 .  
         [0045]    The outer diameter of the cylinder flange portion  213  is smaller than the inner diameter of the insertion groove  204 , and an oil flow channel (F) is formed by the outer circumference of the cylinder flange portion  213 , the inner circumference of the insertion groove  204 , the bottom surface of the insertion groove  204  and the flange portion  222  of the discharge cover  220 .  
         [0046]    The inner diameter of the inner space of the plenum portion  221  and the outer diameter of the flange portion  222  are concentric circles. A discharge hole  223  for discharging gas is formed at a certain side of the plenum portion  221  of the discharge cover  220 . The valve body  250  inserted into the plenum portion  221  includes a discharge valve  251  for opening/closing the compression space  211  of the cylinder  210  and a valve spring  252  for elastically supporting the discharge valve  251 .  
         [0047]    It is preferable for the cylinder  210  and the discharge cover  220  to be fixedly combined with each other by welding the flange portion  222  and the frame  200 .  
         [0048]    A piston  30  connected to the motor part is inserted into the compression space  211  of the cylinder  210 .  
         [0049]    In addition, as depicted in FIG. 4, yet another embodiment of the cylinder head of the compressor in accordance with the present invention includes a frame  300  having a plate portion  302  extended from a body  301  so as to have a certain size, a through hole  303  formed at the body  301  and an insertion groove  304  formed at a certain surface of the body  301  so as to be a concentric circle of the through hole  303 ; a cylinder  310  having a flange portion  313  formed at a certain end of a cylinder body  312  having an internal compression space  311 , a ring-shaped protrusion  314  formed at a certain side of the cylinder body  312  so as to have a certain width and a height, wherein the cylinder body  312  and the flange portion  313  respectively combine with the through hole  303  and the insertion groove  304  of the frame  300 ; a discharge cover  320  including a cap-shaped plenum portion  321  having an inner diameter corresponded to an outer diameter of the ring-shaped protrusion  314 , a flange portion  322  curved-extended from the end of the plenum portion  321  so as to have a certain size, wherein the inner diameter of the flange portion  322  is inserted into the ring-shaped protrusion  314  and the flange portion  322  is contacted to a step surface of the frame insertion groove  304 , namely, a certain side of the frame body  301 ; plural bolts  330  for fastening the flange portion  322  of the discharge cover  320  with the body  301  of the frame  300 ; and a valve body  350  inserted into the plenum portion  321  of the discharge cover  320  and opening/closing the compression space  311  of the cylinder  310 .  
         [0050]    The plate portion  302  of the frame  300  is formed at a certain side of the frame body  301  so as to have the same plane, the insertion groove  304  has an inner diameter and a depth greater than those of the through hole  303  so as to be a concentric circle of the through hole  303  of the body  301 .  
         [0051]    The inner circumference of the ring-shaped protrusion  314  of the cylinder  310  has the same plane as the inner circumference of the compression space  311 .  
         [0052]    The outer diameter of the body  312  of the cylinder  310  is the same as the inner diameter of the through hole  303  of the frame  300 .  
         [0053]    The outer diameter of the flange portion  313  is smaller than the inner diameter of the insertion groove  304 , and an oil flow channel (F) is formed by the outer circumference of the flange portion  313 , the inner circumference of the insertion groove  304 , the bottom surface of the insertion groove  304  and the flange portion  322  of the discharge cover  320 .  
         [0054]    A sealing member  340  is placed between the flange portion  313  of the cylinder  310  and the flange portion  322  of the discharge cover  320 . The sealing member  340  has a certain thickness and a ring shape same as the shape of the cylinder flange portion  313 , and it is preferable for the sealing member  340  to be made of elastic materials.  
         [0055]    Because an added thickness of the flange portion  313  and the sealing member  340  is greater than a depth of the insertion groove  304 , the sealing member is pressed by fastening of the bolt  330 , and accordingly sealing is performed.  
         [0056]    A reinforcing rib  305  is formed at the internal surface at which the body  301  of the frame  300  meets the flange portion  302  to reinforce strength by fastening of the bolt  330 .  
         [0057]    In FIG. 4, unexplained reference numeral  351  is a discharge valve, and  352  is a valve spring.  
         [0058]    As depicted in FIG. 5, in a modified example of the sealing structure, because a thickness t1 of the flange portion  313  of the cylinder  310  is greater than a depth t2 of the insertion groove  304  of the frame  300 , when the discharge cover  320  is combined with the frame  300  by the bolt  330 , the flange portion  322  of the discharge cover  320  is elastically deformed.  
         [0059]    Because the flange portion  322  of the discharge cover  320  is combined as elastically deformed, sealing is performed between the flange portion  322  and the frame  300  as well as between the flange portion  322  of the discharge cover  320  and the flange portion  313  of the cylinder  310 . Accordingly, it is possible not to use the sealing member.  
         [0060]    It is preferable for the flange portion  322  of the discharge cover  320  to have a thickness t3 in the range of 2 mm˜4 mm.  
         [0061]    The discharge cover  320  is made of steel. And, when the thickness t3 of the flange portion  322  is in the range of 2 mm˜4 mm and the flange portion  322  is combined with the frame  300  by the bolt  330 , the flange portion  32  is elastically deformed without causing deformation of the frame  300 , and accordingly it can perform a sealing function.  
         [0062]    As depicted in FIG. 6, as a modified example of the frame  300 , the plate portion  302  having a certain size is formed at a certain side of the body  301 , the through hole  303  is formed at the body  301 , and the ring-shaped protrusion  306  having a certain width and a height is formed at a certain side of the body  301 .  
         [0063]    The plate portion  302  of the frame  300  has the same plane as the certain side of the body  301 , the ring-shaped protrusion  306  is formed at a certain side of the body  301  on which the plate portion  302  is formed, the insertion groove  304  having a certain diameter and a depth is formed by the ring-shaped protrusion portion  306 , and the inner diameter of the insertion groove  304  is a concentric circle of the through hole  303 .  
         [0064]    And, a reinforcing rib  305  for reinforcing strength is formed at a portion at which the body  301  meets the plate portion  302  of the frame  300 .  
         [0065]    And, combining the cylinder  310  with the discharge cover  320  by the bolt  330  is the same as the above-described embodiment. In more detail, the body  312  and the flange portion  313  of the cylinder  310  are respectively inserted into the through hole  303  and the insertion groove  304  of the frame  300 , and accordingly the cylinder  310  is combined with the frame  300 .  
         [0066]    And, the inner diameter of the plenum portion  321  of the discharge cover  320  is inserted into the protrusion  314  of the cylinder  310 , the flange portion  322  is contacted to the upper surface of the protrusion  306  of the frame  300 , and the flange portion  322  of the discharge cover  320  is combined with the protrusion  306  of the frame  300  by the plural bolts  330 .  
         [0067]    Hereinafter, advantages of the cylinder head for the reciprocating compressor in accordance with the present invention will be described. First, the driving force of the motor part is transmitted to the piston  30 , the piston  30  performs a linear reciprocating motion in the compression space  111 ,  211 ,  311  of the cylinder, simultaneously the valve body  150 ,  250 ,  350  opens/closes the compression space  111 ,  211 ,  311 , and accordingly gas is sucked, compressed and discharged.  
         [0068]    The high temperature-high pressure gas discharged from the compression space  111 ,  211 ,  311  of the cylinder passes the internal space of the plenum portion  121 ,  221 ,  321  of the discharge cover and is discharged to the outside through the discharge hole  123 ,  223 ,  323 .  
         [0069]    And, during that process, high-temperature heat is generated at the end of the discharge side of the cylinder  110 ,  210 ,  310 .  
         [0070]    In the embodiment of the present invention, the protrusion  114  of the cylinder  110  is the concentric circle of the compression space  111  of the cylinder  110 , when the cylinder  110  is combined with the frame  100 , because the inner diameter of the plenum portion  121  of the discharge cover  120  is inserted into the protrusion  114  of the cylinder  110 , the compression space  111  of the cylinder  110  coincides with the internal space of the plenum portion  121  of the discharge cover  120 , and accordingly an assembly accuracy can be improved and an assembly can be facilitated.  
         [0071]    And, because the compression space  111  of the cylinder  110  precisely coincides with the internal space of the plenum portion  121  of the discharge cover  120 , the valve body  150  placed inside the internal space of the plenum portion  121  of the discharge cover  120  can accurately open/close the compression space  111  in the operation.  
         [0072]    In addition, because the inner circumference of the plenum portion  121  of the discharge cover  120  contacts to the outer circumference of the protrusion  114  of the cylinder  110  and simultaneously the flange portion  113  of the cylinder  110  contacts to the flange portion  122  of the discharge cover  120 , leakage of the high temperature-high pressure gas discharged from the compression space  111  of the cylinder  110  can be minimized.  
         [0073]    In the another embodiment of the present invention, the inner diameter of the insertion groove  204  of the frame  200  is the same as the outer diameter of the flange portion  222  of the discharge cover  220 , the through hole  203  of the frame  200  is the concentric circle of the inner diameter of the insertion groove  204 , and the outer diameter of the flange portion  222  of the discharge cover  220  is the concentric circle of the inner diameter of the internal space of the plenum portion  221 . When the cylinder  210  is inserted into the through hole  203  of the frame  200 , the compression space  211  of the cylinder  210  coincides with the internal space of the plenum portion  221  of the discharge cover  220 , and accordingly it is possible to improve an assembly accuracy and facilitate an assembly.  
         [0074]    In addition, the flange portion  213  of the cylinder  210  contacts to the flange portion  222  of the discharge cover  220 , the outer circumference of the flange portion  222  contacts to the inner circumference of the insertion groove  204  of the frame  200 , it is possible to minimize leakage of high temperature-high pressure gas discharged from the compression space  211  of the cylinder  210  to the outside.  
         [0075]    In addition, an oil flow channel (F) is formed between the outer circumference of the flange portion  213  of the cylinder  210 , the internal surface of the insertion groove  204  and the flange portion  222  of the discharge cover  220 , and accordingly heat generated at the discharge side of the cylinder  210  can be cooled by oil flowing in the oil flow channel (F).  
         [0076]    In the yet another embodiment of the present invention, the protrusion  314  of the cylinder  310  is the concentric circle of the compressions space  311  of the cylinder  310 , when the cylinder  310  is inserted into the through hole  303  of the frame  300 , the inner diameter of the plenum portion  321  of the discharge cover  320  is inserted into the protrusion  314  of the cylinder  310 , the compression space  311  of the cylinder  310  coincides with the internal space of the plenum portion  321  of the discharge cover  320 , and accordingly it is possible to improve an assembly accuracy and facilitate an assembly.  
         [0077]    In addition, the inner circumference of the plenum portion  321  of the discharge cover  320  contacts to the outer circumference of the protrusion  314  of the cylinder  310 , the flange portion  313  of the cylinder  310  contacts to the flange portion  322  of the discharge cover  320 , and accordingly it is possible to minimize leakage of high temperature-high pressure gas discharged from the compression space  211  of the cylinder  210  to the outside.  
         [0078]    An oil flow channel (F) is formed between the outer circumference of the flange portion  313  of the cylinder  310 , the internal surface of the insertion groove  304  of the frame  300  and the flange portion  322  of the discharge cover  320 , heat generated at the discharge side of the compression space  311  of the cylinder  310  can be cooled by oil flowing in the oil flow channel (F).  
         [0079]    And, when the sealing member  340  is inserted between the flange portion  322  of the discharge cover  320  and the flange portion  313  of the cylinder  310 , it is possible to minimize leakage of gas and oil.  
         [0080]    In addition, when the flange portion  322  of the discharge cover  320  performs the sealing function by being elastically deformed, contact force is strengthened, and accordingly it is possible to minimize leakage of gas and oil.  
       INDUSTRIAL APPLICABILITY  
       [0081]    As described above, in the cylinder head of the reciprocating compressor in accordance with the present invention, by facilitating and simplifying an assembly process of construction parts and bettering assembly accuracy, assembly productivity can be improved. In addition, by minimizing leakage of high temperature-high pressure gas discharged from a compression space of a cylinder to the outside, gas compression performance can be improved.  
         [0082]    In addition, in compressing and discharging of gas in the compression space of the cylinder, by sufficiently cooling high temperature heat generated in the discharge side of the cylinder, deformation and damage of construction parts can be prevented, and accordingly reliability of a product can be improved.