A compressor and an electrical appliance including the compressor

Abstract

The present invention discloses a compressor and an electrical appliance including the compressor, wherein the compressor includes a flange provided with an exhaust passage and a muffler covering the exhaust passage, wherein the muffler is tightly connected to the flange, wherein the flange is provided with an axial hole matched with the crankshaft of the compressor, and the muffler is arranged at the side of the axial hole. In this arrangement, the muffler is arranged at the side of the crankshaft, and the muffler is small in size and easy to assemble with the flange, thereby avoiding deformation of the muffler, flange, cylinder, etc. due to assembly force during the assembly process, resulting in wear of parts of the compressor pump body, noise, and high power consumption of the compressor when the compressor pump body is running.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and more particularly to a compressor and an electrical appliance comprising the compressor. Background Art

[0002] The pump body assembly of the compressor includes a cylinder and a flange. The flange is provided with an exhaust port for the air flow in the cylinder to flow out. The high-speed, high-pressure refrigerant airflow acts on the exhaust port, generating a lot of noise. Currently, the noise is mainly eliminated and reduced by installing a muffler on the outside of the flange.

[0003] In the prior art, please refer to Figure 1 , the muffler completely covers the flange, the crankshaft passes through the muffler, the edge of the muffler and the corresponding position of the flange are provided with openings 1, the corresponding position of the cylinder is provided with threaded holes, the screws pass through the openings 1 on the muffler and flange in turn, and then extend into the threaded holes of the cylinder and tighten, usually 4 to 5 screws are required for tightening. This installation method has high requirements on the position accuracy of the holes for screws to penetrate on the muffler, flange and cylinder. When the position deviates, it is easy to cause installation difficulties, screw tightening difficulties, and micro-deformation of the cylinder, flange or muffler. When the above parts are slightly deformed, the compressor is prone to internal wear of the pump body assembly during operation, noise and high energy consumption.

[0004] Therefore, how to solve the problems in the prior art where the muffler and the pump body assembly are difficult to assemble, and which easily lead to internal wear of the pump body assembly, noise, and high energy consumption, has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a compressor and an electrical appliance including the compressor, which solves the problems in the prior art that the muffler and the pump assembly are difficult to assemble, and are prone to internal wear of the pump assembly, noise, and high energy consumption. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a compressor, comprising a flange provided with an exhaust channel and a muffler covering the exhaust channel, the muffler and the flange are fastened together, the flange is provided with an axial hole matching with the crankshaft of the compressor, and the muffler is arranged at the side position of the axial hole.

[0008] Preferably, the muffler and the flange are both provided with mounting holes, and fasteners penetrate into the mounting holes to fasten the muffler and the flange together.

[0009] Preferably, the mounting hole is arranged in the middle of the top surface of the muffler.

[0010] Preferably, the exhaust passage is provided with an exhaust valve, and the exhaust valve is connected to the flange via the fastener.

[0011] Preferably, the exhaust valve includes a first valve plate and an elastic member cooperating with the exhaust channel, the first end of the elastic member is fixedly connected to the flange through the fastener, and the second end acts on the first valve plate; when the refrigerant gas pushes the first valve plate to open the exhaust channel, the elastic member undergoes elastic deformation; when the elastic member restores the elastic deformation, it drives the first valve plate to reset and blocks the exhaust channel.

[0012] Preferably, the exhaust valve also includes a second valve plate arranged on the surface of the flange, the second valve plate is provided with a through hole for the fastener to penetrate so as to fix the second valve plate to the flange, the first end of the elastic member is connected to the second valve plate, and a channel for the circulation of refrigerant gas is provided between the edge of the second valve plate and the edge of the exhaust channel.

[0013] Preferably, the fastener includes a first section penetrating the second valve plate and the flange and a second section connected to the first section, and a cross-sectional area of ​​the first section is smaller than a cross-sectional area of ​​the second section.

[0014] Preferably, the muffler is provided with an exhaust hole for exhausting the gas in the cavity of the muffler.

[0015] Preferably, the flow area of ​​the exhaust hole is smaller than or equal to the flow area of ​​the exhaust channel.

[0016] Preferably, a groove is provided on the surface of the flange, and the end of the muffler extends into the groove.

[0017] Preferably, a sealing gasket is provided between the end of the muffler and the groove.

[0018] Preferably, the flange includes a flange plate and a flange shaft diameter connected to the flange plate, the axial hole is formed in the flange shaft diameter, the distance between the top inner wall of the muffler and the flange plate is a, the height of the flange shaft is b, and the relationship between a and b is 0.5≤a / b≤1.5.

[0019] Preferably, an inner wall of the exhaust passage is provided with a protrusion for preventing the first valve sheet from escaping from the exhaust passage.

[0020] Preferably, the cross-section of the muffler is in the shape of a circle, an ellipse, a polygon or an irregular shape.

[0021] Preferably, the fastener is a rivet.

[0022] The present invention also provides an electrical appliance, comprising a compressor, wherein the compressor is the above-mentioned compressor.

[0023] In the technical solution provided by the present invention, the compressor includes a flange and a muffler, the flange is provided with an exhaust channel, the muffler is arranged on the surface of the flange, and is tightly connected to the flange. The muffler covers the exhaust channel of the flange. The compressed refrigerant gas flows from the exhaust channel into the cavity of the muffler, and the noise is reduced by the muffler. The flange is provided with an axial hole for the crankshaft of the compressor to pass through, and the muffler is arranged at the side of the axial hole. In this arrangement, the muffler is arranged at the side of the axial hole, and the flange is no longer covered as a whole, so that the muffler is miniaturized and it is easier to fix the muffler on the flange, which reduces the degree of uneven force on the muffler, flange, cylinder, etc. during assembly, reduces the deformation of the pump body assembly of the compressor during assembly, and avoids problems such as wear, noise, and high energy consumption of the compressor during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a muffler in the prior art;

[0026] Figure 2 Schematic diagram of the assembly structure of the muffler and the flange in an embodiment of the present invention;

[0027] Figure 3 is a cross-sectional view of a flange in an embodiment of the present invention;

[0028] Figure 4 yes Figure 2 AA section view of the middle flange and silencer;

[0029] Figure 5 is a top view of a muffler in one embodiment of the present invention;

[0030] Figure 6 is a top view of a muffler in another embodiment of the present invention;

[0031] Figure 7 1 is a top view of a muffler in yet another embodiment of the present invention.

[0032] Figure 1-Figure 7 middle:

[0033] 1-opening, 2-flange, 21-flange plate, 22-flange shaft diameter, 3-muffler, 4-fastener, 5-exhaust hole, 6-first valve plate, 7-elastic member, 8-second valve plate, 9-sealing gasket, 10-mounting hole, 11-shaft hole, 12-channel, 13-exhaust channel. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0035] The purpose of this specific embodiment is to provide a compressor that solves the problems of difficulty in assembling the muffler and the pump body assembly, and easily causing internal wear of the pump body assembly, noise, and high energy consumption.

[0036] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims. In addition, the entire contents of the configurations shown in the following embodiments are not limited to the solutions required as the invention described in the claims.

[0037] See also Figure 2-Figure 4 In this embodiment, the compressor includes a pump body assembly, which includes a cylinder, a flange 2 arranged at the end of the cylinder, and a crankshaft. The flange 2 is provided with an exhaust passage 13 for the refrigerant gas in the cylinder to be discharged and an axial hole 11 for the crankshaft to penetrate. The compressor also includes a muffler 3 covering the exhaust passage 13, the muffler 3 is fastened to the flange 2, and the muffler 3 is arranged at the side of the axial hole 11, that is, the crankshaft no longer penetrates the muffler 3. The refrigerant gas in the cylinder is discharged into the cavity of the muffler 3 through the exhaust passage 13, and the exhaust noise is reduced by the muffler 3.

[0038] In this way, the muffler 3 is arranged on the side of the crankshaft. The muffler 3 is small in size and easy to assemble with the flange 2, which reduces the degree of uneven force on the muffler 3, flange 2, cylinder, etc. during assembly, reduces the deformation of the compressor pump body assembly during assembly, and avoids wear of the compressor pump body assembly, noise, high compressor energy consumption and other problems during installation.

[0039] In the preferred solution of this embodiment, both the muffler 3 and the flange 2 are provided with mounting holes 10 for the fasteners 4 to penetrate, and the fasteners 4 penetrate the mounting holes 10 on the muffler 3 and the flange 2 to fasten the muffler 3 and the flange 2 together.

[0040] However, in the prior art, the screws need to pass through the openings of the muffler and the flange in sequence and then extend into the threaded holes of the cylinder. The screws fasten the muffler, the flange and the cylinder together. Each screw needs to penetrate three parts to achieve the fastening of the muffler.

[0041] With such arrangement, in the present solution, the fastener 4 only needs to be inserted into the mounting holes 10 of the two components, the muffler 3 and the flange 2, to fix the muffler 3. Each fastener 4 only needs to be inserted into two holes. It is easier to align the two mounting holes 10 on the muffler 3 and the flange 2 than to align three holes. The muffler 3 is more convenient to fix. At the same time, the deformation of the pump body assembly during the installation process is reduced, which in turn causes problems such as wear, noise, and high energy consumption in the compressor.

[0042] In the preferred solution of this embodiment, the mounting hole 10 of the muffler 3 is arranged in the middle of the top surface of the muffler 3. Figure 4 The upper end face of the muffler 3 in the placement state shown. The fastener 4 extends from the mounting hole 10 into the cavity of the muffler 3 and penetrates the cavity of the muffler 3 in the axial direction. In this way, the miniaturized muffler 3 can be fixed by the fastener 4 arranged in the middle and penetrating in the axial direction, and the fixation is relatively firm; moreover, the fastener 4 is arranged in the middle of the muffler 3, which can reduce the number of fasteners 4 and further reduce the difficulty of assembling the muffler 3.

[0043] It should be noted that the number of fasteners 4 is less than 4. Preferably, the number of fasteners 4 is one, which is arranged at the position of the central axis of the muffler 3. In this way, when assembling the muffler 3, only one fastener 4 needs to be installed, which reduces the complexity of assembling the muffler 3 and avoids deformation of the pump body assembly, as well as problems such as wear, noise, and high energy consumption caused by deformation.

[0044] In this embodiment, the exhaust passage 13 is provided with an exhaust valve, and the exhaust valve is connected to the flange 2 through a fastener 4. The muffler 3 and the flange 2, and the exhaust valve and the flange 2 can be fixed by the same fastener 4. In this arrangement, the fastener 4 fixes both the muffler 3 and the exhaust valve, which simplifies the installation method and reduces the number of fasteners 4.

[0045] Specifically, the exhaust valve includes a first valve plate 6 that moves under the push of the refrigerant gas and an elastic member 7 that drives the first valve plate 6 to reset. The first valve plate 6 is arranged in the exhaust channel 13, and opens and closes the exhaust channel 13 by moving in the exhaust channel 13. The first end of the elastic member 7 is fixedly connected to the fastener 4, so that the first end of the elastic member 7 is fixed relative to the flange 2, and the second end of the elastic member 7 acts on the first valve plate 6. Specifically, the first end of the elastic member 7 can be connected to a connecting plate or a connecting rod fixedly arranged on the fastener 4 to achieve fixed connection with the fastener 4. When the pressure of the refrigerant gas in the cylinder is greater than the first threshold value, the refrigerant gas pushes the first valve plate 6 to move in a direction away from the cylinder, the exhaust channel 13 is opened, and the elastic member 7 undergoes elastic deformation; when the pressure of the refrigerant gas in the cylinder is less than the first threshold value, the elastic member 7 restores the elastic deformation and drives the first valve plate 6 back to its original position, and the first valve plate 6 blocks the exhaust channel 13. The elastic member 7 can be a spring, or an elastic column made of an elastic material, etc.

[0046] Furthermore, the exhaust valve further comprises a second valve plate 8, which is provided with a through hole for the fastener 4 to penetrate, and is fixed to the surface of the flange 2 by the fastener 4. Specifically, the second valve plate 8 can be fixed by the tight fit between the through hole and the fastener 4. The first end of the elastic member 7 is connected to the second valve plate 8, and a channel 12 for the circulation of refrigerant gas is provided between the edge of the second valve plate 8 and the edge of the exhaust channel 13. The fastener 4 fixes the second valve plate 8 to the surface of the flange 2, and a part of the second valve plate 8 partially blocks the exhaust channel 13, and the part of the second valve plate 8 is connected to the first end of the elastic member 7, and the second end of the elastic member 7 is connected to the first valve plate 6. When the refrigerant gas pushes the first valve plate 6 to move in the exhaust channel 13, the exhaust channel 13 is opened, and the refrigerant gas flows through the channel 12; when the elastic member 7 recovers its deformation, the elastic member 7 drives the first valve plate 6 to return to its original position, and the exhaust channel 13 is blocked again.

[0047] In this arrangement, the exhaust passage 13 is opened by moving the first valve plate 6, and the elastic member 7 drives the first valve plate 6 to return to its original position to block the exhaust passage 13. The second valve plate 8 is convenient for fixing the elastic member 7 and can also prevent the first valve plate 6 from escaping from the exhaust passage 13 and entering the cavity of the muffler 3.

[0048] It should be noted that the fixing method of the spring can be that the first end of the spring is fixedly connected to the second valve plate 8, and the second end is in contact with the first valve plate 6, or the first end of the spring is in contact with the second valve plate 8, and the second end is fixedly connected to the first valve plate 6. It can also be that the two ends of the spring are fixedly connected to the first valve plate 6 and the second valve plate 8 respectively.

[0049] In this embodiment, the fastener 4 is inserted through the mounting hole 10 of the muffler 3, passes through the entire cavity of the muffler 3, then passes through the through hole of the second valve plate 8, passes through the second valve plate 8, and then passes through the mounting hole 10 on the flange 2. The fastener 4 includes two sections, namely the first section and the second section. The first section is located between the second valve plate 8 and the flange 2, and the second section is located in the cavity of the muffler 3 and outside the second valve plate 8. The cross-sectional area of ​​the first section is smaller than the cross-sectional area of ​​the second section. In this way, the cross-sectional area of ​​the second section is large, which can prevent the second valve plate 8 from moving along the axial direction of the fastener 4.

[0050] Specifically, the second section of the fastener 4 is tapered near the first section, and the cross-sectional area of ​​the end of the tapered portion near the first section is small. In this way, the cross-sectional area of ​​the connection position between the first section and the second section of the fastener 4 gradually changes, making it more convenient to manufacture and produce the fastener 4.

[0051] In this embodiment, the muffler 3 is provided with an exhaust hole 5, and the muffler 3 is covered on the surface of the upper flange 2. The refrigerant gas in the cylinder is discharged into the cavity of the muffler 3 through the exhaust channel 13 of the upper flange 2, and the noise is reduced by the muffler 3, and then enters the shell cavity of the compressor through the exhaust hole 5 of the muffler 3. Of course, in other embodiments, the muffler 3 can also be set on the lower flange 2. Most of the mufflers 3 connected to the lower flange 2 are not provided with an exhaust hole 5, but a few are provided with an exhaust hole 5; usually, the refrigerant gas in the cylinder is discharged into the muffler cavity between the lower flange 2 and the muffler 3, and then discharged into the space between the upper flange 2 and the muffler 3 through the gas flow channel of the pump body assembly, and finally the refrigerant gas is discharged into the shell cavity of the compressor.

[0052] In the preferred solution of this embodiment, the flow area of ​​the exhaust hole 5 is less than or equal to the flow area of ​​the exhaust channel 13. The flow area of ​​the exhaust hole 5 refers to the area of ​​the exhaust hole 5 for the refrigerant gas to flow, and the flow area of ​​the exhaust channel 13 refers to the cross-sectional area of ​​the exhaust channel 13 for the refrigerant to flow. In this way, the refrigerant gas can stay in the muffler 3 for a certain period of time, and the noise is reduced by the reflection of the sound wave, and the muffler 3 has a better noise reduction effect on the compressor. Preferably, the flow area of ​​the exhaust hole 5 is less than or equal to the minimum flow area of ​​the exhaust channel 13.

[0053] In this embodiment, a groove is provided on the surface of the flange 2, and the end of the muffler 3 extends into the groove, and the end refers to the lower end of the muffler 3. The lower end of the muffler 3 is Figure 4 The shape of the groove is consistent with the contour of the lower end surface of the muffler 3. In this way, the muffler 3 is more firmly fixed, and the muffler 3 is prevented from being misplaced on the surface of the flange 2.

[0054] In the preferred solution of this embodiment, a sealing gasket 9 is provided between the lower end of the muffler 3 and the groove. In particular, when the width of the groove is greater than the wall thickness of the muffler 3, the sealing gasket 9 can prevent the muffler 3 from being misaligned with the flange 2, and can also play a sealing role. In other embodiments, when the width of the groove is less than or equal to the wall thickness of the muffler 3, the lower end of the muffler 3 and the groove are interference fit, and the sealing gasket 9 may not be provided between the muffler 3 and the groove. The sealing gasket 9 may be, but is not limited to, a rubber gasket.

[0055] In this embodiment, the flange 2 includes a flange plate 21 and a flange shaft diameter 22. The flange shaft diameter 22 is arranged at the center of the upper surface of the flange plate 21. An axial hole 11 is formed in the flange shaft diameter 22, and a crankshaft is passed through the shaft hole 11. The distance between the top inner wall of the muffler 3 and the upper surface of the flange plate 21 is a, and the height of the flange shaft diameter 22 is b. Then a and b should satisfy 0.5≤a / b≤1.5. That is to say, the distance between the top inner wall of the muffler 3 and the upper surface of the flange plate 21 is greater than or equal to one-half of the height of the flange shaft diameter 22, and the distance between the top inner wall of the muffler 3 and the upper surface of the flange plate 21 is less than or equal to 1.5 times the height of the flange shaft diameter 22.

[0056] Since the silencer 3 is located at the side of the shaft hole 11, its width must be smaller than the radius of the flange 2. To achieve a better silencing effect, the silencer 3 needs to have a larger cavity, so the distance between the top inner wall of the silencer 3 and the upper surface of the flange 21 is greater than or equal to half the height of the flange shaft diameter 22; however, the installation space inside the compressor is limited, so the distance between the top inner wall of the silencer 3 and the upper surface of the flange 21 is limited to less than or equal to 1.5 times the height of the flange shaft diameter 22. With this arrangement, the silencer 3 has a better silencing effect and can meet the requirements of the installation space.

[0057] In this embodiment, a protrusion is provided on the inner wall of the exhaust passage 13, and the protrusion extends from the inner wall of the exhaust passage 13 to the central axis of the exhaust passage 13. In addition, the second valve disc 8 is provided on the surface of the flange 2 to partially block the exhaust passage 13. In this way, the second valve disc 8 prevents the first valve disc 6 from falling out of the exhaust passage 13 when the exhaust passage 13 is opened, and the protrusion prevents the first valve disc 6 from falling out of the exhaust passage 13 when the elastic member 7 drives the first valve disc 6 to reset.

[0058] In the preferred embodiment of this embodiment, please refer to FIG. Figure 7 The silencer 3 is a cover structure, and the shape of its cross section is a closed figure surrounded by curves, such as a circle or an ellipse, etc. It can also be a polygon, such as a rectangle, a pentagon, etc., or an irregular figure, etc., as long as the silencer 3 can achieve silencer.

[0059] In this solution, the fastener 4 is a rivet, which penetrates the muffler 3 and the flange 2 in sequence to fasten the two together. Of course, in other embodiments, the fastener 4 can also be a screw or the like.

[0060] The following content specifically describes the compressor in combination with the above-mentioned embodiments. In this embodiment, the compressor includes a flange 2 and a muffler 3. The flange 2 is provided with an exhaust channel 13 for the refrigerant gas in the cylinder to be discharged and an axial hole 11 for the crankshaft of the compressor to be inserted. The muffler 3 covers the exhaust channel 13 and is located at the side of the axial hole 11. The exhaust channel 13 is provided with an exhaust valve, and the exhaust valve includes a first valve plate 6 arranged in the exhaust channel 13, a second valve plate 8 arranged on the surface of the flange 2, and a spring connected between the two. A mounting hole 10 is provided in the middle of the top surface of the muffler 3, and a mounting hole 10 is also provided at a corresponding position on the flange 2. A through hole is provided on the second valve plate 8. The rivet is sequentially inserted into the mounting hole 10 of the muffler 3, penetrates the cavity of the muffler 3, and then extends into the through hole, and then penetrates into the mounting hole 10 on the flange 2 and is fastened. A channel 12 is provided between the edge of the second valve plate 8 and the edge of the exhaust channel 13. The part of the rivet located in the second valve plate 8 and the flange 2 is the first section, and the section located in the cavity of the muffler 3 and outside the second valve plate 8 is the second section. The cross-sectional area of ​​the first section is smaller than the cross-sectional area of ​​the second section. The muffler 3 is provided with an exhaust hole 5, and the flow area of ​​the exhaust hole 5 is less than or equal to the flow area of ​​the exhaust channel 13. The surface of the flange 2 is provided with a groove, the lower end of the muffler 3 extends into the groove, and a sealing gasket 9 is provided between the lower end of the muffler 3 and the groove. The flange 2 includes a flange plate 21 and a flange shaft diameter 22. The distance between the top inner wall of the muffler 3 and the flange plate 21 is a, and the height of the flange shaft diameter 22 is b. The relationship between a and b satisfies 0.5≤a / b≤1.5. The inner wall of the exhaust channel 13 is provided with a protrusion, and the protrusion and the second valve plate 8 prevent the first valve plate 6 from escaping from the two ends of the exhaust channel 13 respectively.

[0061] In this arrangement, the silencer 3 of the compressor is arranged at the side of the crankshaft. The silencer 3 is small in size and easy to assemble with the flange 2, reducing the deformation of the pump body assembly during assembly. Moreover, the fastener 4 only passes through the silencer 3 and the mounting holes 10 on the flange 2, and the mounting holes 10 are easier to align, making the silencer 3 easy to install, avoiding deformation of the pump body assembly due to force during installation, causing noise, wear, high power consumption, and other problems in the pump body assembly. The rivet fixes both the silencer 3 and the exhaust valve, simplifies the installation method, and reduces the number of fasteners 4.

[0062] The present invention also provides an electrical appliance, including a compressor, which is the compressor in the above embodiment. The electrical appliance can be, but is not limited to, an air conditioner, a refrigerator, etc. With such a configuration, the muffler 3 of the compressor is relatively small in size and is easy to assemble with the flange 2, thereby reducing the deformation of the pump body assembly during assembly. The muffler 3 is easy to install, which reduces the degree of uneven force on the muffler 3, flange 2, cylinder, etc. during assembly, thereby avoiding problems such as wear, noise, and high energy consumption of the compressor pump body assembly during installation. The derivation process of this beneficial effect is generally similar to the derivation process of the beneficial effect brought about by the compressor, so it will not be repeated in this article.

[0063] It is understood that the same or similar parts in the above embodiments can refer to each other, and the content not described in detail in some embodiments can refer to the same or similar content in other embodiments. The multiple solutions provided by the present invention include the basic solution itself, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A compressor, characterized in that: It comprises a flange (2) provided with an exhaust passage (13) and a muffler (3) covering the exhaust passage (13), the muffler (3) and the flange (2) being tightly connected, the flange (2) being provided with an axial hole (11) matching with the crankshaft of the compressor, and the muffler (3) being arranged at a side position of the axial hole (11); The muffler (3) and the flange (2) are both provided with mounting holes (10), and the fastener (4) is inserted into the mounting hole (10) to fasten the muffler (3) and the flange (2) together; The mounting hole (10) of the muffler (3) is arranged in the middle of the top surface of the muffler (3); The exhaust passage (13) is provided with an exhaust valve, and the exhaust valve is connected to the flange (2) via the fastener (4); The number of the fastener (4) is one, and the fastener (4) is arranged at the position of the central axis of the muffler (3); The muffler (3) and the flange (2), and the exhaust valve and the flange (2) are fixed via the same fastener (4).

2. The compressor according to claim 1, characterized in that The exhaust valve comprises a first valve plate (6) and an elastic member (7) which cooperate with the exhaust passage (13); the first end of the elastic member (7) is fixedly connected to the flange (2) via the fastener (4), and the second end acts on the first valve plate (6); when the refrigerant gas pushes the first valve plate (6) to open the exhaust passage (13), the elastic member (7) undergoes elastic deformation; when the elastic member (7) restores its elastic deformation, it drives the first valve plate (6) to return to its original position, thereby blocking the exhaust passage (13).

3. The compressor according to claim 2, characterized in that The exhaust valve also includes a second valve plate (8) arranged on the surface of the flange (2), the second valve plate (8) being provided with a through hole for the fastener (4) to penetrate so as to fix the second valve plate (8) to the flange (2), the first end of the elastic member (7) being connected to the second valve plate (8), and a channel (12) for the circulation of refrigerant gas being provided between the edge of the second valve plate (8) and the edge of the exhaust channel (13).

4. The compressor according to claim 3, characterized in that The fastener (4) comprises a first section penetrating the second valve plate (8) and the flange (2) and a second section connected to the first section, wherein the cross-sectional area of ​​the first section is smaller than the cross-sectional area of ​​the second section.

5. The compressor according to claim 1, characterized in that The muffler (3) is provided with an exhaust hole (5) for exhausting the gas in the cavity of the muffler (3).

6. The compressor according to claim 5, characterized in that The flow area of ​​the exhaust hole (5) is smaller than or equal to the flow area of ​​the exhaust channel (13).

7. The compressor according to claim 1, characterized in that The surface of the flange (2) is provided with a groove, and the end of the muffler (3) extends into the groove.

8. The compressor according to claim 7, characterized in that A sealing gasket (9) is provided between the end of the muffler (3) and the groove.

9. The compressor according to claim 1, characterized in that The flange (2) comprises a flange plate (21) and a flange shaft diameter (22) connected to the flange plate (21), the axial hole (11) is formed in the flange shaft diameter (22), the distance between the top inner wall of the muffler (3) and the flange plate (21) is a, the height of the flange shaft diameter (22) is b, and the relationship between a and b is 0.5≤a / b≤1.

5.

10. The compressor according to claim 2, characterized in that The inner wall of the exhaust passage (13) is provided with a protrusion for preventing the first valve plate (6) from falling out of the exhaust passage (13).

11. The compressor according to claim 1, characterized in that The cross-section of the muffler (3) is in the shape of a circle, an ellipse or an irregular shape.

12. The compressor according to claim 1, characterized in that The fastener (4) is a rivet.

13. An electrical appliance, characterized in that: It comprises a compressor, and the compressor is the compressor according to any one of claims 1 to 12.

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