JP6144156B2 - Compressor and refrigeration cycle apparatus - Google Patents

Description

  Embodiments described herein relate generally to a compressor and a refrigeration cycle apparatus.

  2. Description of the Related Art Conventionally, a compressor including a compression mechanism that compresses a working fluid such as a gas refrigerant and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged is known. 1.

  In such a discharge valve device of the compressor, a recess is formed around the discharge hole in the discharge hole forming member in which the discharge hole is formed, and the reed valve is accommodated in the recess. The reed valve has a fixed support part on one end side, a valve head for opening and closing the discharge hole on the other end side, and the fixed support part is attached to the discharge hole forming member by rivet fastening.

  When the reed valve is accommodated in the recess and is riveted, the reed valve may rotate around the fixed support part side where the reed valve is riveted, and the valve head may be displaced from the discharge hole. Therefore, in order to ensure that the valve head can close the discharge hole even if the valve head is misaligned with respect to the discharge hole, the diameter of the valve head is formed larger.

JP 2004-116413 A

  However, the weight of the valve head is increased by forming the valve head with a larger diameter. As the weight of the valve head increases, the open / close response of the reed valve decreases and compression loss occurs, or the impact force at the time of collision of the valve head with the valve seat due to opening / closing increases and the valve cracks. There is a problem that occurs.

  An object of an embodiment of the present invention is to suppress the displacement of the valve head of the reed valve with respect to the discharge hole and to reduce the diameter of the valve head when the reed valve is attached to the discharge hole forming member. It is an object of the present invention to provide a compressor having a discharge valve device and a refrigeration cycle apparatus including the compressor.

The compressor according to the embodiment includes a compression mechanism unit that compresses the working fluid and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged. The discharge valve device includes a discharge hole. A valve that has a recessed portion formed around the discharge hole in the formed discharge hole forming member and a fixed support portion that is housed in the recess and is fixed to the discharge hole forming member at one end and opens and closes the discharge hole at the other end A reed valve having a head, a valve presser provided opposite to the reed valve, one end of which is fixed to the discharge hole forming member side together with the fixed support portion of the reed valve, and the other end is raised in a direction away from the discharge hole The reed valve has a long reed valve body in which the fixed support part and the valve head are connected, one end side is connected to the fixed support part side, and the other end side is in the longitudinal direction of the reed valve body through a slit. A guide portion extending opposite to the side surface of Has, if the reed valve is fixed to the discharge hole forming member is accommodated in the recess, the guide unit is characterized in that in contact with the side wall of the recess elastically deformed.

It is a block diagram of the refrigerating-cycle apparatus containing the compressor shown in the cross section in 1st Embodiment. It is a top view which shows the attachment structure of the reed valve to a main bearing. It is a top view which shows the reed valve accommodated in the recessed part. It is sectional drawing which shows the reed valve accommodated in the recessed part. It is a top view which shows the reed valve in 2nd Embodiment. It is a top view which shows the reed valve accommodated in the recessed part.

(First embodiment)
A first embodiment will be described with reference to FIGS. A refrigeration cycle apparatus 1 shown in FIG. 1 has a compressor body 2 and an accumulator 3, and compresses a gas refrigerant that is a working fluid, and is connected to the compressor body 2 and discharged from the compressor body 2. A condenser 5 that condenses the high-pressure gas refrigerant that is converted into a liquid refrigerant, an expansion device 6 that is connected to the condenser 5 to depressurize the liquid refrigerant, and is connected between the expansion device 6 and the accumulator 3 to obtain a liquid refrigerant. And an evaporator 7 for evaporating the refrigerant. The accumulator 3 and the compressor body 2 are connected by a suction pipe 8 through which a gas refrigerant flows.

  The compressor body 2 has a sealed case 9 formed in a cylindrical shape, and an electric motor unit 10 located on the upper side and a compression mechanism unit 11 located on the lower side are accommodated in the sealed case 9. Yes. The electric motor unit 10 and the compression mechanism unit 11 are connected via a rotating shaft 12 having a vertical center line and rotating around the center line.

  The electric motor unit 10 is a part that drives the compression mechanism unit 11. The electric motor unit 10 includes a rotor 13 that is fixed to the rotary shaft 12 and a stator 14 that is fixed to the sealing case 9 and disposed at a position surrounding the rotor 13. Have. The rotor 13 is provided with a permanent magnet (not shown), and a current-carrying coil (not shown) is wound around the stator 14.

  The compression mechanism part 11 is a part which compresses a gas refrigerant, and has the 1st compression element 16a and the 2nd compression element 16b which are located up and down via the partition plate 15. FIG.

  The first compression element 16a located on the upper side has a first cylinder 17a, the lower end side of the first cylinder 17a is closed by the partition plate 15, and the upper end side of the first cylinder 17a is supported so that the rotary shaft 12 can rotate. Is closed by a main bearing 18a which is a first discharge valve forming member. A first cylinder chamber 19a is formed in the first cylinder 17a by closing the upper and lower ends of the first cylinder 17a with the main bearing 18a and the partition plate 15. The first cylinder chamber 19a and a second cylinder chamber, which will be described later, pass through the rotary shaft 12, and a first eccentric portion 20a is formed in a portion of the rotary shaft 12 located in the first cylinder chamber 19a. The first roller 21a is fitted to the portion 20a. The first roller 21a is arranged to rotate eccentrically while the outer peripheral surface thereof is in line contact with the inner peripheral surface of the first cylinder 17a when the rotary shaft 12 rotates. The first compression element 16a includes the first cylinder 17a, the first eccentric portion 20a, the first roller 21a, a blade described later that partitions the first cylinder chamber 19a into two spaces (a suction chamber and a compression chamber described later), and the like. It is comprised by.

The second compression element 16b located on the lower side has the same configuration as the first compression element 16a described above, and has a second cylinder 17b. The upper end side of the second cylinder 17b is closed by the partition plate 15, The lower end side of the cylinder 17b is closed by a secondary bearing 18b, which is a second discharge valve forming member that rotatably supports the rotary shaft 12. A second cylinder chamber 19b is formed in the second cylinder 17b by closing the upper and lower ends of the second cylinder 17b with the partition plate 15 and the auxiliary bearing 18b. The rotating shaft 12 is penetrated through the second cylinder chamber 19b, and a second eccentric portion 20b is formed in a portion of the rotating shaft 12 located in the second cylinder chamber 19b. The second eccentric portion 20b includes a second roller. 21b is fitted. The second roller 21b is arranged to rotate eccentrically while the outer peripheral surface thereof is in line contact with the inner peripheral surface of the second cylinder 17b when the rotary shaft 12 rotates. The second compression element 16b includes a blade described later that partitions the second cylinder 17b, the second eccentric portion 20b, the second roller 21b, and the second cylinder chamber 19b into two spaces (a suction chamber and a compression chamber described later). It is comprised by.

  The main bearing 18a, which is a discharge hole forming member, is formed with a first discharge hole 22a through which the gas refrigerant compressed in the first compression element 16a is discharged, and the secondary bearing 18b, which is a discharge hole forming member, has a second bearing. A second discharge hole 22b through which the gas refrigerant compressed in the compression element 16b is discharged is formed. The main bearing 18a is provided with a first discharge valve device 23a for opening and closing a first discharge valve device 23a for opening and closing the first discharge hole 22a, and the auxiliary bearing 18b is provided with a first discharge valve device 23a for opening and closing the second discharge hole 22b. A two-discharge valve device 23b is provided. Further, a first muffler 24a is attached to the main bearing 18a so as to cover the first discharge valve device 23a and into which the gas refrigerant discharged from the first discharge hole 22a flows. The sub-bearing 18b is provided with a second muffler 24b that is disposed at a position covering the second discharge valve device 23b and into which the gas refrigerant discharged from the second discharge hole 22b flows. In the first muffler 24a and the second muffler 24b, a communication path (not shown) formed through the auxiliary bearing 18b, the second cylinder 17b, the partition plate 15, the first cylinder 17a, and the main bearing 18a. It is communicated by. The first muffler 24 a is formed with a communication hole 25 through which the gas refrigerant that has flowed into the first and second mufflers 24 a and 24 b flows into the sealed case 9.

  The first discharge valve device 23a is accommodated in the first recess 26a formed around the first discharge hole 22a in the main bearing 18a in which the first discharge hole 22a is formed, and accommodated in the first recess 26a. A first reed valve 27a that is fixed to 18a and opens and closes the first discharge hole 22a; and a first valve presser 28a that is fixed to the main bearing 18a and restricts the maximum opening of the first reed valve 27a. .

  The second discharge valve device 23b has the same configuration as the first discharge valve device 23a described above, and a second recess 26b formed around the second discharge hole 22b in the auxiliary bearing 18b in which the second discharge hole 22b is formed. A second reed valve 27b that is accommodated in the second recess 26b and is fixed to the sub-bearing 18b to open and close the second discharge hole 22b, and a maximum opening degree of the second reed valve 27b that is fixed to the sub-bearing 18b. And a second valve presser 28b for regulating the pressure.

  As shown in FIG. 2, the tip of the first cylinder 17a is brought into contact with the outer peripheral surface of the first roller 21a, and the volume and pressure are increased in the first cylinder chamber 19a as the first roller 21a rotates. A blade 31 is provided to partition the suction chamber 29 and the compression chamber 30 which are two changing spaces. The other end of the suction passage 32 to which the suction pipe 8 is connected is connected to the suction chamber 29 at one end. Although not shown in the figure, the second cylinder 17b is also provided with a similar blade, and by this blade, the space inside the second cylinder chamber 19b changes in volume and pressure as the second roller 21b rotates. Are divided into a suction chamber and a compression chamber.

  As shown in FIGS. 2 and 3, the first reed valve 27a includes a fixed support portion 33 provided at one end and fixed to the main bearing 18a, and a valve head provided at the other end to open and close the first discharge hole 22a. A long reed valve main body 35 connecting the portions 34 and a pair of guide portions 36 located on both sides of the reed valve main body 35 are provided. One end of the guide portion 36 is connected to the fixed support portion 33 side, and the other end side extends through the slit 37 so as to face the side surface in the longitudinal direction of the reed valve main body 35. 2 and 3, the first valve presser 28a is omitted.

The width dimension “Ha” between the pair of guide portions 36 in the first reed valve 27 a and the width dimension “Hb” between the side walls of the portion where the guide portion 36 is located in the first recess 26 a are set to be approximately the same dimension. When the 1-reed valve 27a is accommodated in the first recess 26a, the outer surface of the guide portion 36 may abut against the side wall of the first recess 26a or may have a slight gap.

  The first reed valve 27a is fixed to the main bearing 18a by inserting a rivet 39 into a mounting hole 38 formed in the fixing support portion 33 of the first reed valve 27a and tightening the rivet.

  As shown in FIG. 4, the first valve presser 28a is accommodated in the first recess 26a, is opposed to the first reed valve 27a, and is fastened together with the first reed valve 27a by a rivet 39. The first valve presser 28a is formed such that the side facing the fixed support portion 33 is flat, and the other end side is curved and rises away from the first discharge hole 22a.

  The end position “A” (see FIG. 3) of the slit 37, which is the portion where the guide portion 36 and the fixed support portion 33 are connected, on the fixed support portion 33 side, the first valve presser 28 a rises from the flat portion. It is located closer to the fixed support portion 33 than the starting position “B”.

  2 to 4, only the first reed valve 27a and the first valve presser 28a of the first discharge valve device 23a have been described. However, the second reed valve 27b and the second valve presser of the second discharge valve device 23b are described. 28b is also formed in the same configuration as the first reed valve 27a and the first valve presser 28a.

  In such a configuration, in the compressor 4, when the electric motor unit 10 is energized, the rotation shaft 12 rotates around the center line, and the rotation of the rotation shaft 12 drives the compression mechanism unit 11. The gas refrigerant is compressed in the two compression elements 16a and 16b.

  When the pressure of the compressed gas refrigerant reaches the set pressure, the first and second reed valves 27a and 27b are opened and the compressed gas refrigerant is discharged from the first and second discharge holes 22a and 22b. The gas refrigerant thus made flows into the first and second mufflers 24a and 24b. The gas refrigerant that has flowed into the first and second mufflers 24 a and 24 b flows into the sealed case 9 from the communication hole 25.

  The first reed valve 27a is accommodated in the first recess 26a and riveted to be attached to the main bearing 18a, and the valve head 34 closes the first discharge hole 22a.

  When the first reed valve 27a is housed in the first recess 26a and is riveted to the main bearing 18a, the first reed valve 27a rotates around the fixed support portion 33 side, and the other end of the guide portion 36 The side abuts against the side wall of the first recess 26a, and the movement of the first reed valve 27a in the rotational direction is restricted. Here, the guide part 36 is extended from the fixed support part 33 side to the valve head part 34 side, and the distance from the other end side of the guide part 36 to the 1st discharge hole 22a is short. For this reason, the first reed valve 27a rotates around the fixed support portion 33 side, and the other end side of the guide portion 36 abuts against the side wall of the first recess 26a, thereby restricting the movement of the first reed valve 27a in the rotational direction. In this case, the amount of movement of the valve head 34 in the rotational direction can be kept small. Thereby, the position shift with respect to the 1st discharge hole 22a of the valve head 34 caused by the 1st reed valve 27a moving to a rotation direction centering on the fixed support part 33 side can be suppressed. Accordingly, the diameter of the valve head 34 can be reduced, and the valve head 34 can be reduced in weight by reducing the diameter of the valve head 34. By reducing the weight of the valve head 34, the responsiveness when the first reed valve 27a opens and closes the first discharge hole 22a can be improved, and the valve of the first discharge hole 22a accompanying the opening and closing is improved. The impact force at the time of collision with the seat can be reduced to prevent the first reed valve 27a from cracking, and the performance and reliability of the compressor 4 can be improved.

Further, one end of the guide portion 36 is connected to the fixed support portion 33 side and is branched from the reed valve main body 35, and faces the side surface of the reed valve main body 35 through a slit 37. For this reason, even if the reed valve main body 35 moves up and down for discharging the gas refrigerant from the first discharge holes 22a, the guide portion 36 does not move up and down. Therefore, even if the guide part 36 contacts the side wall of the first recess 26a, there is no problem with respect to the performance of opening and closing the first discharge hole 22a by the first reed valve 27a.

  The end position “A” on the fixed support portion 33 side of the slit 37 where the guide portion 36 and the fixed support portion 33 are connected is the position “the first valve presser 28 a starts to rise from the flat portion”. It is located on the fixed support portion 33 side from B ″. For this reason, even if the reed valve main body 35 moves up and down due to the discharge of the gas refrigerant from the first discharge hole 22a, the change in stress generated in the reed valve main body 35 due to the up and down movement is fixed to the slit 37. It does not reach the end position “A” on the support portion 33 side, and the occurrence of cracks and cracks at the end position “A” of the slit 37 can be prevented as the reed valve main body 35 moves up and down.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as the component demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted. In FIG. 6, the first valve presser 28a is omitted.

  The basic configuration of the compressor of the second embodiment is the same as that of the compressor 4 of the first embodiment, has two compression elements, and compresses the main bearing 18a and the auxiliary bearing in the respective compression elements. A discharge valve device that opens and closes a discharge hole through which the gas refrigerant is discharged is provided.

  The difference of the compressor of the second embodiment from the compressor 4 of the first embodiment is the configuration of the reed valve 40 of the discharge valve device. FIG. 5 shows the reed valve 40, and FIG. 6 shows the reed valve 40 accommodated in a first recess 26a formed in the main bearing 18a and riveted.

  As shown in FIGS. 5 and 6, the reed valve 40 is provided at one end and is fixed to the main bearing 18a, and the valve head 34 is provided at the other end to open and close the first discharge hole 22a. And a pair of guide portions 41 located on both sides of the reed valve main body 35. One end of the guide portion 41 is connected to the fixed support portion 33 side, and the other end side extends through the slit 37 so as to face the side surface in the longitudinal direction of the reed valve main body 35.

  On the other side of the guide portion 41 opposite to the surface facing the reed valve main body 35, an overhanging portion 42 that protrudes away from the reed valve main body 35 is formed.

  The width dimension “Hc” between the overhang portions 42 formed in the pair of guide portions 41 is formed to be larger than the width dimension “Hb” between the side walls of the portion where the guide portion 41 is located in the first recess 26 a. Thus, when the reed valve 40 is accommodated in the first recess 26a and riveted to the main bearing 18a, the overhanging portion 42 abuts against the side wall of the first recess 26a as shown in FIG. The other end side is elastically deformed toward the reed valve body 35, and the amount of elastic deformation in each guide portion 41 is substantially the same.

  Further, the extension position of the guide portion 41 in the longitudinal direction of the reed valve main body 35 is set to a substantially intermediate position of the dimension from the fixed support portion 33 to the valve head portion 34.

  Further, as in the first embodiment, the end position “A” on the fixed support portion 33 side of the slit 37, which is the portion where the guide portion 41 and the fixed support portion 33 are connected, has a valve presser that is flat from the flat portion. It is located on the fixed support portion 33 side from the position “B” (see FIG. 4) where the rising starts.

In such a configuration, a first valve is used to rive the reed valve 40 to the main bearing 18a.
When accommodated in the recess 26a, the width dimension “Hc” between the overhang portions 42 is formed larger than the width dimension “Hb” between the side walls of the first recess 26a. The guide portion 41 is elastically deformed toward the reed valve main body 35 while being in contact with the side wall of the first recess 26a, and the amount of elastic deformation is substantially the same between the pair of guide portions 41. Thereby, the reed valve 40 accommodated in the 1st recessed part 26a can be easily located in the approximate center of the width direction between the side walls of the 1st recessed part 26a, and the position of the valve head 34 and the 1st discharge hole 22a is possible. Deviation can be suppressed. For this reason, the diameter of the valve head 34 can be reduced, and the valve head 34 can be reduced in weight by reducing the diameter of the valve head 34. By reducing the weight of the valve head 34, the responsiveness when the first reed valve 27a opens and closes the first discharge hole 22a can be improved, and the valve of the first discharge hole 22a accompanying the opening and closing is improved. The impact force at the time of collision with the seat can be reduced to prevent the first reed valve 27a from cracking, and the performance and reliability of the compressor 4 can be improved.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 4 ... Compressor, 5 ... Condenser, 6 ... Expansion apparatus, 7 ... Evaporator, 18a ... Main bearing (discharge hole forming member), 18b ... Sub bearing (discharge hole forming member), 22a, 22b ... Discharge hole, 23a , 23b ... discharge valve device, 26a, 26b ... recess, 27a, 27b ... reed valve, 28a, 28b ... valve retainer, 33 ... fixed support part, 34 ... valve head, 35 ... reed valve body, 36 ... guide part, 37 ... Slit, 40 ... Reed valve, 41 ... Guide part, 42 ... Overhang part

Claims (5)

In a compressor having a compression mechanism that compresses a working fluid and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged.
The discharge valve device includes a recess formed around the discharge hole in the discharge hole forming member in which the discharge hole is formed, and a fixed support that is housed in the recess and fixed to the discharge hole forming member at one end. A reed valve having a valve head that opens and closes the discharge hole at the other end and the reed valve facing the reed valve, and one end side is fixed to the discharge hole forming member together with a fixed support portion of the reed valve And the other end side has a valve presser rising in a direction away from the discharge hole,
The reed valve has a long reed valve main body that connects the fixed support portion and the valve head, one end side is connected to the fixed support portion side, and the other end side is a longitudinal length of the reed valve main body through a slit. A guide portion extending opposite to the side surface in the direction ,
When the reed valve is accommodated in the recess and fixed to the discharge hole forming member, the guide portion abuts against a side wall of the recess and elastically deforms . A pair of the guide portions are provided on both sides of the reed valve main body, an overhang portion is formed on the surface of the guide portion opposite to the surface facing the reed valve main body, and the width dimension Hc between the overhang portions is , greater than the width Hb between the sidewalls of the recess, compressor of claim 1, wherein said guide portion is characterized in that the elastically deformed by the projecting portion abuts against the side wall of the recess. A pair of said guide portion when said protruding portion is in contact with the side wall of the recess, claim 2, characterized in that the amount of elastic deformation of the pair of the guide portion is formed so as to be substantially the same The compressor described. End of the fixed support side of the slit, according to any one of claims 1 to 3 wherein the valve retainer is characterized by being located on the fixed support part side than the position at which to start rising Compressor. A compressor according to any one of claims 1 to 4, a condenser connected to the compressor, an expansion device connected to the condenser, and between the expansion device and the compressor A refrigeration cycle apparatus comprising: an evaporator to be connected.

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