CN212838252U - Cylinder head, compressor and refrigeration equipment - Google Patents

Abstract

The embodiment of the utility model provides a cylinder head, compressor and refrigeration plant, the cylinder head includes lid body and installation department, and the lid body has the first end and the second end that deviate from each other; the mounting part is connected with the cover body; the distance between the outer wall surface of the cover body and the mounting part is the thickness of the cover body, and the thickness of the first end of the cover body is smaller than that of the second end of the cover body. The cover body has different thicknesses at the first end and the second end, so that the appearance of the cylinder cover is adaptive to the shell of the compressor, the space between the cylinder cover and the shell is reduced, the compact layout is realized, meanwhile, the inner side volume of the cylinder cover as large as possible can be obtained, the influence of the compact layout on the exhaust pressure and the exhaust pulsation of the cylinder can be reduced, the compressor using the cylinder cover can work normally, and the reliability of the compressor is ensured.

Description

Cylinder head, compressor and refrigeration equipment

Technical Field

The embodiment of the utility model provides a relate to compressor technical field, particularly, relate to a cylinder head, a compressor and refrigeration plant.

Background

The totally-enclosed refrigeration compressor has wide application, and the compressor tends to be miniaturized more and more along with the development of the society, so that the structure of the compressor is required to be more compact, and the requirements of all parts and occupied space are required to be smaller and smaller. In order to ensure the normal operation of each part in a small space, the structure of each part needs to be reasonably designed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims at solving one of the technical problem that exists among the prior art at least.

To this end, a first aspect of an embodiment of the present invention provides a cylinder head.

A second aspect of embodiments of the present invention provides a compressor.

A third aspect of the embodiments of the present invention provides a refrigeration apparatus.

In view of this, according to a first aspect of embodiments of the present invention, there is provided a cylinder head comprising a head body and a mounting portion, the head body having a first end and a second end that diverge from each other; the mounting part is connected with the cover body; the distance between the outer wall surface of the cover body and the mounting part is the thickness of the cover body, and the thickness of the first end of the cover body is smaller than that of the second end of the cover body.

The embodiment of the utility model provides a cylinder head, including the lid body and the installation department that are connected, the installation department can be connected with treating the installation face to it is fixed to realize the installation of cylinder head, and the lid body then realizes the cylinder head as the cover function of lid. The cylinder head is applied to a compressor, and a casing of the compressor is generally curved to protrude outward such that an inner surface of the casing is curved. The cover body has different thicknesses at the first end and the second end, so that the appearance of the cylinder cover is adaptive to the shell of the compressor, the space between the cylinder cover and the shell is reduced, the compact layout is realized, meanwhile, the inner side volume of the cylinder cover as large as possible can be obtained, the influence of the compact layout on the exhaust pressure and the exhaust pulsation of the cylinder can be reduced, the compressor using the cylinder cover can work normally, and the reliability of the compressor is ensured.

In addition, according to the utility model discloses above-mentioned technical scheme provides the cylinder head still has following additional technical characteristics:

in one possible design, a line connecting the first end and the second end of the cap body is taken as a height direction, a distance between a point on the outer wall surface of the cap body and the second end of the cap body is taken as the height of the cap body, and the thickness of the cap body is inversely related to the height of the cap body.

In this design, the definition of the thickness of the cap body is expanded from the first end and the second end to the entire outer wall surface of the cap body. The thickness of the cover body is increased along with the reduction of the height of the cover body, the thickness of the cover body can be gradually changed on the premise that the thickness of the first end is smaller than that of the second end, the appearance of the cylinder cover is further adapted to the shell of the compressor, the distance between the cylinder cover and the shell is favorably further reduced, the compact layout is realized, meanwhile, the inner side volume of the cylinder cover as large as possible can be obtained, the influence of the compact layout on the exhaust pressure and the exhaust pulsation of the cylinder can be reduced, the compressor using the cylinder cover can normally work, and the reliability of the compressor is guaranteed.

In one possible design, the outer wall surface of the cap body includes a curved surface that protrudes toward a direction away from the center of the cap body.

In this design, the outer wall that has specifically injectd the lid body includes the curved surface, and the outstanding direction of this curved surface is the direction of keeping away from the center of lid body, both can further match with the shape of the casing of compressor, obtain the inboard volume of cylinder head as big as possible when realizing the compactification overall arrangement, can make the outer wall smooth transition of lid body again, help increasing the structural strength of lid body, and then increase the overall structure intensity of cylinder head, help improving the crashworthiness of cylinder head and the compressor of using this cylinder head, promote the security.

In one possible design, the cylinder head further comprises: and the bulge is connected with the outer wall surface of the cover body.

In the design, the cylinder cover further comprises a protruding portion arranged on the outer wall surface of the cover body, and the protruding portion extends out of the cover body, so that after the cylinder cover is applied to the compressor, the distance between the protruding portion and the shell of the compressor can be smaller than the distance between other structures of the cylinder cover and the shell, when the compressor collides, the protruding portion can preferentially collide with the shell of the compressor, further the other structures of the cylinder cover are protected, the anti-collision performance of the compressor using the cylinder cover is improved, and the safety in the transportation and use processes is improved.

In one possible design, the boss has a third end and a fourth end that face away from each other, the third end of the boss facing the first end of the closure body and the fourth end of the boss facing the second end of the closure body; the distance between the outer wall surface of the boss and the mounting part is the thickness of the boss, and the thickness of the third end of the boss is smaller than that of the fourth end of the boss.

In this design, to the bellying, through making the bellying possess different thickness at third end and fourth end, specifically speaking, the third end and the fourth end of bellying are respectively towards the first end and the second end of lid body, and the third end of bellying and the first end of lid body are the less one end of thickness, and the fourth end of bellying and the second end of lid body are the great one end of thickness, can make the appearance of bellying adapt to with the casing of compressor for the third end and the fourth end of bellying and the interval of casing are different not greatly. When the compressor collides, the contact area between the boss and the shell can be increased, so that the stress on unit area is reduced, namely, the collision pressure is reduced, the anti-collision performance of the compressor using the cylinder cover is improved, and the safety in the transportation and use processes is improved.

In one possible design, the outer wall surface of the boss includes a curved surface that protrudes toward a direction away from the center of the cap body.

In the design, the outer wall surface of the protruding portion is specifically limited to include a curved surface, and the protruding direction of the curved surface is a direction away from the center of the cover body, and can be further matched with the shape of the shell of the compressor, so that the distances between different positions of the protruding portion and the shell are different. When the compressor collides, the contact area between the boss and the shell can be further increased, so that the stress on unit area is reduced, namely, the collision pressure is reduced, the anti-collision performance of the compressor using the cylinder cover is improved, and the safety in the transportation and use processes is improved.

In one possible design, the boss is of unitary construction with the cap body.

In this design, through making bellying and lid body integrated into one piece, the joint strength of multiplicable bellying and lid body junction on the one hand, the two is as an overall structure simultaneously, for solitary lid body, its structural complexity obtains promoting for this overall structure can bear the external force of a plurality of directions, thereby has increased the bulk strength of cylinder head, helps improving compressor crashworthiness, increases the security. On the other hand, the assembly process can be simplified, and the processing efficiency is improved.

In one possible design, the cylinder head further includes an intake port located at the second end of the head body and a closing portion connected to the head body, the closing portion covering a portion of the intake port.

In this design, the air inlet is located the second end of lid body, and the air inlet is used for installing the muffler of breathing in of compressor, can produce certain destruction to the overall structure of cylinder head, and the closing part then shelters from a part of air inlet, can compensate the destruction that the air inlet caused, is favorable to increasing the intensity of cylinder head. The air inlet is combined with the closed part, so that the normal installation of the air suction silencer is guaranteed, the running noise of a compressor using the cylinder cover is reduced, the cylinder cover can be guaranteed to have enough strength, and the reliability of a product is improved.

According to the utility model discloses a second aspect of the embodiment provides a compressor, and the compressor includes the cylinder head as above-mentioned any one technical scheme, therefore possesses the whole beneficial technological effects of this cylinder head, no longer gives unnecessary details here.

In one possible design, the compressor further comprises: the cylinder cover is positioned in the shell and is matched with the shell.

In this design, the compressor further comprises a casing housing the cylinder head, the casing being generally curved to project outwardly so that the inner surface of the casing is curved. By fitting the cylinder head to the housing, that is, as shown in fig. 7, the shape of the outer wall surface of the cylinder head is made to coincide with the shape of the housing at the corresponding position, specifically, the shape of the outer wall surface of the head body is made to coincide with the shape of the housing at the corresponding position, the distances between the points on the outer wall surface of the head body and the inner wall surface of the housing can be made substantially equal, and the inner volume of the cylinder head can be made as large as possible while achieving a compact layout. Further, when the cylinder cover comprises the bulge part, the shape of the outer wall surface of the bulge part can be kept consistent with the shape of the shell at the corresponding position, the distance between each point on the outer wall surface of the bulge part and the inner wall surface of the shell can be basically equal, the contact area between the bulge part and the shell can be increased, the anti-collision performance of the compressor using the cylinder cover is improved, and the safety in the transportation and use processes is improved.

In one possible design, a point arbitrarily selected from the outer wall surface of the head body of the cylinder head is referred to as a first point, and a distance between the first point and the inner wall surface of the housing is 4mm or more and 8mm or less.

In the design, the range of the distance between the outer wall surface of the cover body and the inner wall surface of the shell is 4mm to 8mm, namely the distance between the outer wall surface of the cover body and the inner wall surface of the shell is averagely 6mm, and 2mm of errors are allowed, so that the compact layout of the compressor can be realized, the collision between the cylinder cover and the shell can be reduced, the anti-collision performance of the compressor is improved, and the safety in the transportation and use processes is ensured.

In one possible design, any point on the outer wall surface of the boss portion of the cylinder head is referred to as a second point, and the distance between the second point and the inner wall surface of the housing is not less than 3mm and not more than 7 mm.

In the design, the range of the distance between the outer wall surface of the boss and the inner wall surface of the shell is 3mm to 7mm, namely the distance between the outer wall surface of the boss and the inner wall surface of the shell is 5mm on average, and 2mm of errors are allowed, so that the compact layout of the compressor can be realized, the collision between the cylinder cover and the shell can be reduced, the anti-collision performance of the compressor is improved, and the safety in the transportation and use processes is ensured.

According to a third aspect of an embodiment of the present invention, there is provided a refrigeration apparatus, comprising a cylinder head according to any one of the above-mentioned technical solutions; or the compressor according to any of the above technical solutions, so that the cylinder head or the compressor has all the beneficial technical effects, which are not described herein again.

Additional aspects and advantages in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a cylinder head according to an embodiment of the invention;

fig. 2 shows a schematic structural view of a cylinder head according to an embodiment of the invention;

fig. 3 shows a schematic structural view of a cylinder head according to an embodiment of the invention;

fig. 4 shows a front view of a cylinder head according to an embodiment of the invention;

fig. 5 shows a left side view of a cylinder head according to an embodiment of the invention;

fig. 6 shows a top view of a cylinder head according to an embodiment of the invention;

fig. 7 shows a cross-sectional view of a compressor according to an embodiment of the present invention;

fig. 8 shows a schematic view of a partial structure of a compressor according to an embodiment of the present invention;

figure 9 shows a schematic block diagram of a refrigeration device according to an embodiment of the present invention;

fig. 10 shows a schematic block diagram of a refrigeration device according to another embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

1 compressor, 2 refrigeration plant, 100 cylinder head, 110 cover body, 111 first end, 112 second end, 113 air inlet, 114 enclosed part, 120 installation part, 121 mounting plate, 122 mounting hole, 130 boss, 131 third end, 132 fourth end, 200 casing, 210 upper casing, 220 lower casing, 300 fastener, 400 crankcase, 500 motor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A cylinder head 100, a compressor 1, and a refrigeration apparatus 2 provided according to some embodiments of the present invention are described below with reference to fig. 1 to 10.

The first embodiment is as follows:

as shown in fig. 1, an embodiment of a first aspect of the present invention provides a cylinder head 100, which can be applied to a compressor 1 of a refrigeration device 2, wherein the cylinder head 100 includes a cover body 110 and a mounting portion 120, the cover body 110 has a first end 111 and a second end 112 that are away from each other; the mounting part 120 is connected with the cap body 110; as shown in fig. 5, the distance between the outer wall surface of the cap body 110 and the mounting portion 120 is the thickness D of the cap body 110, and the thickness of the first end 111 of the cap body 110 is smaller than the thickness of the second end 112 of the cap body 110.

The embodiment of the utility model provides a cylinder head 100, including the lid body 110 and the installation department 120 that are connected, installation department 120 can be connected with waiting to install the face to it is fixed to realize the installation of cylinder head 100, and lid body 110 then realizes the cover function of cylinder head 100 as the lid. The cylinder head 100 is applied to a compressor 1, and particularly, the compressor 1 is a hermetic refrigeration compressor, and a casing 200 of the compressor 1 is generally curved to protrude outward, so that an inner surface of the casing 200 is curved. By providing the cover body 110 with different thicknesses at the first end 111 and the second end 112, the outer shape of the cylinder head 100 can be adapted to the shell 200 of the compressor 1, which is beneficial to reducing the distance between the cylinder head 100 and the shell 200, realizing compact layout, and meanwhile, obtaining the inner side volume of the cylinder head 100 as large as possible, reducing the influence of the compact layout on the discharge pressure and discharge pulsation of the cylinder, ensuring the normal operation of the compressor 1 applying the cylinder head 100 and ensuring the reliability of the compressor 1. Specifically, the mounting portion 120 includes a mounting plate 121 and mounting holes 122 penetrating the mounting plate 121, and as shown in fig. 4, the number of the mounting holes 122 may be four, for example, and the four mounting holes are located at four corners of a rectangular mounting board. The mounting holes 122 may be bolt holes or screw holes, for example, to fix the cylinder head 100 with fasteners 300, and the fasteners 300 may be bolts or screws, for example. Accordingly, the cover body 110 avoids the mounting hole 122 to provide a sufficient space for the fastener 300 to be assembled.

Further, the direction of the double arrow shown in fig. 5 is the height direction of the cap body 110, the distance between the point on the outer wall surface of the cap body 110 and the second end 112 of the cap body 110 is the height H of the cap body 110, and the thickness D of the cap body 110 increases as the height H of the cap body 110 decreases. At this time, on the premise that the thickness of the first end 111 is smaller than that of the second end 112, the thickness of the cover body 110 is gradually changed, that is, the thicknesses are sequentially increased from top to bottom as shown in fig. 5, so that the outer shape of the cylinder cover 100 is further adapted to the shell 200 of the compressor 1, which is beneficial to further reducing the distance between the cylinder cover 100 and the shell 200 and realizing a compact layout, and meanwhile, the inner side volume of the cylinder cover 100 can be obtained as large as possible, the influence of the compact layout on the exhaust pressure and the exhaust pulsation of the cylinder can be reduced, so that the compressor 1 using the cylinder cover 100 normally works, and the reliability of the compressor 1 is ensured. It is understood that the thickness of the cap body 110 may be the same or different at different locations of the same height, as shown in fig. 6. With reference to fig. 4, at the same height of the cover body 110, from the left side to the right side in fig. 4, the thickness of the cover body 110 may be the same everywhere, or may increase first and then decrease, and the thickness reaches the maximum at the center, or may vary in other ways. It is defined herein that the thickness of the cap body 110 is inversely related to the height of the cap body 110, that is, two points are taken at the same position in the left-right direction of the outer wall surface of the cap body 110, for example, as shown in fig. 4, a point a and a point b are taken at the center, the two points have different heights, the height of the point b is relatively lower, that is, closer to the second end 112 of the cap body 110, as shown in fig. 5, and the thickness D1 of the cap body 110 at the point a is smaller than the thickness D2 at the point b.

Further, the outer wall surface of the cap body 110 includes a curved surface, and the protruding direction of the curved surface is a direction away from the center of the cap body 110. This not only can further match with the shape of the casing 200 of the compressor 1, and obtain the inner side volume of the cylinder head 100 as large as possible while realizing the compact layout, but also can make the outer wall surface of the cover body 110 smoothly transited, which is helpful for increasing the structural strength of the cover body 110, and further increasing the overall structural strength of the cylinder head 100, and is helpful for improving the crashworthiness of the cylinder head 100 and the compressor 1 using the cylinder head 100, and improving the safety. Alternatively, the outer wall surface of the cap body 110 may include a spherical surface or an ellipsoidal surface depending on the shape of the inner wall surface of the housing 200, and further, the outer wall surface of the cap body 110 is consistent with the shape of the inner wall surface of the housing 200, which may sufficiently improve the compactness of the structure. It is understood that the outer wall surface of the cap body 110 may also include a flat surface, which is also an implementation of the present application and falls within the scope of the present application.

Example two:

on the basis of the first embodiment, the second embodiment provides a cylinder head 100, as shown in fig. 1, the cylinder head 100 further includes a protrusion 130 disposed on an outer wall surface of the head body 110, and after the cylinder head 100 is applied to the compressor 1, since the protrusion 130 protrudes out of the head body 110, a distance between the protrusion 130 and the casing 200 of the compressor 1 is smaller than a distance between other structures of the cylinder head 100 and the casing 200, when the compressor 1 collides, the protrusion 130 may preferentially collide with the casing 200 of the compressor 1, so as to protect other structures of the cylinder head 100, such as the fastener 300 disposed in the mounting hole 122, and at this time, the outer wall surface of the protrusion 130 should exceed a top surface of the fastener 300, which is beneficial to improving collision avoidance performance of the compressor 1 to which the cylinder head 100 is applied, and improving safety during transportation and use. It is understood that the number of the convex portions 130 may be one or more. When the number of the convex portions 130 is one, as for the arrangement position of the convex portions 130, in the case where the height is determined, the convex portions 130 may be specifically connected at the position where the thickness of the cap body 110 is the largest, for example, as shown in fig. 6, the convex portions 130 are located at the center of the cap body 110 in the left-right direction; the protrusion 130 may be specifically connected to a position where the curvature of the outer wall surface of the cap body 110 is large in the height direction.

Further, as shown in fig. 5, the third end 131 and the fourth end 132 of the protrusion 130 face the first end 111 and the second end 112 of the cover body 110, respectively, the distance between the outer wall surface of the protrusion 130 and the mounting portion 120 is the thickness d of the protrusion 130, and the protrusion 130 has different thicknesses at the third end 131 and the fourth end 132, specifically, the third end 131 of the protrusion 130 and the first end 111 of the cover body 110 are smaller in thickness, and the fourth end 132 of the protrusion 130 and the second end 112 of the cover body 110 are larger in thickness, so that the outer shape of the protrusion 130 is adapted to the shell 200 of the compressor 1, and the distance between the third end 131 and the fourth end 132 of the protrusion 130 and the shell 200 is not greatly different. When the compressor 1 collides, the contact area between the protruding part 130 and the shell 200 can be increased, so that the stress per unit area, namely the collision pressure, can be reduced, which is beneficial to improving the crashworthiness of the compressor 1 applying the cylinder cover 100 and improving the safety during transportation and use.

Similarly to the cap body 110, a distance between a point on the outer wall surface of the protrusion 130 and the second end 112 of the cap body 110 is a height of the protrusion 130, or a distance between a point on the outer wall surface of the protrusion 130 and the fourth end 132 of the protrusion 130 is a height of the protrusion 130. The thickness of the protruding portion 130 is inversely related to the height of the protruding portion 130, that is, the thickness of the protruding portion 130 increases with the decrease of the height of the protruding portion 130, so that the shape of the protruding portion 130 can be further adapted to the shell 200 of the compressor 1, and the distance between the protruding portion 130 and the shell 200 at different heights is not greatly different. When the compressor 1 collides, the contact area of the boss 130 and the housing 200 can be further increased.

Further, the outer wall surface of the boss 130 includes a curved surface, and the protruding direction of the curved surface is a direction away from the center of the cap body 110. This may further be matched to the shape of the housing 200 of the compressor 1, so that the different positions of the projection 130 do not differ much from the spacing of the housing 200. When the compressor 1 collides, the contact area between the protruding portion 130 and the shell 200 can be further increased, so that the stress per unit area, i.e., the collision pressure, can be reduced, which is helpful for improving the anti-collision performance of the compressor 1 using the cylinder cover 100 and improving the safety during transportation and use. Alternatively, the outer wall surface of the protrusion 130 may include a spherical surface or an ellipsoidal surface according to the shape of the inner wall surface of the housing 200, and further, the outer wall surface of the protrusion 130 and the inner wall surface of the housing 200 are kept in conformity, so that the contact area between the protrusion 130 and the housing 200 during collision can be sufficiently increased. It is understood that the outer wall surface of the protrusion 130 may also include a flat surface, which is also an implementation manner of the present application and falls within the protection scope of the present application.

Example three:

on the basis of the first embodiment, the third embodiment provides a cylinder head 100. As shown in fig. 2 and 3, the cylinder head 100 further includes an intake port 113 and a closing portion 114. The air inlet 113 is located at the second end 112 of the cover body 110, the air inlet 113 is used for installing a suction muffler of the compressor 1, the whole structure of the cylinder cover 100 can be damaged to a certain extent, the sealing part 114 shields a part of the air inlet 113, the damage caused by the air inlet 113 can be compensated, and the strength of the cylinder cover 100 can be increased. The combination of the air inlet 113 and the sealing part 114 not only ensures the normal installation of the suction muffler, which is beneficial to reducing the operation noise of the compressor 1 using the cylinder cover 100, but also ensures that the cylinder cover 100 has enough strength, and improves the reliability of the product. Specifically, the air inlet, the closing portion and the cover body are of an integrated structure.

As shown in fig. 7, an embodiment of the second aspect of the present invention provides a compressor 1, including the cylinder head 100 according to any of the above embodiments, so as to have all the beneficial technical effects of the cylinder head 100, which will not be described herein again.

In some embodiments, compressor 1 further includes a housing 200 accommodating cylinder head 100, housing 200 being generally curved to project outwardly such that the inner surface of housing 200 is curved. The cylinder head 100 is fitted to the housing 200, that is, as shown in fig. 7, the shape of the outer wall surface of the cylinder head 100 is made to coincide with the shape of the housing 200 at the corresponding position, specifically, the shape of the outer wall surface of the head body 110 is made to coincide with the shape of the housing 200 at the corresponding position, so that the distances between the points on the outer wall surface of the head body 110 and the inner wall surface of the housing 200 are substantially equal, and the inner volume of the cylinder head 100 can be obtained as large as possible while achieving a compact layout. Further, when the cylinder head 100 includes the protruding portion 130, the shape of the outer wall surface of the protruding portion 130 and the shape of the housing 200 at the corresponding position may also be kept consistent, the distance between each point on the outer wall surface of the protruding portion 130 and the inner wall surface of the housing 200 may be substantially equal, the contact area between the protruding portion 130 and the housing 200 may be increased, which is helpful for improving the crashworthiness of the compressor 1 to which the cylinder head 100 is applied, and improving the safety during transportation and use. It is understood that one or both of the cover body 110 and the boss 130 may be shaped to conform to the housing 200, or both may be shaped to conform to the housing 200. Specifically, as shown in fig. 7 and 8, the housing 200 includes an upper housing 210 and a lower housing 220 connected, and the cylinder head 100 is fitted to the upper housing 210.

Further, as shown in fig. 7, the compressor 1 further includes a crankcase 400 and a motor 500, the crankcase 400 is connected to the cylinder head 100, and the crankcase 400 and the motor 500 are accommodated in the housing 200.

In some embodiments, specifically, as shown in fig. 7, a distance W between an outer wall surface of the cap body 110 and an inner wall surface of the housing 200 is in a range of 4mm to 8mm, that is, the distance W between the outer wall surface and the inner wall surface of the housing 200 is on average 6mm, and an error of 2mm is allowed, so that not only can a compact layout of the compressor 1 be realized, but also collision between the cylinder head 100 and the housing 200 can be reduced, collision avoidance performance of the compressor 1 is improved, and safety during transportation and use is ensured. Further, an error of 1mm is allowed, i.e., the distance W ranges from 5mm to 7 mm.

In some embodiments, specifically, as shown in fig. 7, a distance w between the outer wall surface of the protruding portion 130 and the inner wall surface of the casing 200 is in a range of 3mm to 7mm, that is, the distance w between the outer wall surface and the inner wall surface of the casing 200 is 5mm on average, and an error of 2mm is allowed, so that not only can a compact layout of the compressor 1 be realized, but also collision between the cylinder head 100 and the casing 200 can be reduced, collision avoidance performance of the compressor 1 is improved, and safety during transportation and use is ensured. Further, an error of 1mm is allowed, i.e. the distance w ranges from 4mm to 6 mm.

An embodiment of the third aspect of the present invention provides a refrigeration device 2, where the refrigeration device 2 is shown in fig. 9, and includes a cylinder head 100 according to any one of the embodiments described above; or as shown in fig. 10, the compressor 1 according to any of the above embodiments is included, so that the cylinder head 100 or the compressor 1 has all the beneficial technical effects, which will not be described herein again. Further, the refrigeration device 2 further comprises a condenser, a throttling device and an evaporator which are sequentially communicated, an outlet of the evaporator is communicated with the air inlet 113 of the compressor 1, and an exhaust port of the compressor 1 is communicated with an inlet of the condenser.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A cylinder head, characterized by comprising:

a cap body having first and second ends that face away from each other; and

a mounting part connected with the cover body;

the outer wall surface of the cover body is spaced from the mounting portion by the thickness of the cover body, and the thickness of the first end of the cover body is smaller than that of the second end of the cover body.

2. The cylinder head of claim 1,

the connecting line direction of the first end and the second end of the cover body is taken as the height direction, the distance between a point on the outer wall surface of the cover body and the second end of the cover body is taken as the height of the cover body, and the thickness of the cover body is inversely related to the height of the cover body.

3. The cylinder head of claim 1,

the outer wall surface of the cap body includes a curved surface protruding toward a direction away from the center of the cap body.

4. The cylinder head according to any one of claims 1 to 3, further comprising:

and the bulge is connected with the outer wall surface of the cover body.

5. The cylinder head of claim 4,

the boss has a third end and a fourth end facing away from each other, the third end of the boss faces the first end of the cap body, and the fourth end of the boss faces the second end of the cap body;

the outer wall surface of the boss and the distance between the installation parts are the thickness of the boss, and the thickness of the third end of the boss is smaller than that of the fourth end of the boss.

6. The cylinder head of claim 5,

the outer wall surface of the boss includes a curved surface protruding toward a direction away from the center of the cap body.

7. The cylinder head of claim 4,

the protruding part and the cover body are of an integrated structure.

8. The cylinder head according to any one of claims 1 to 3, further comprising:

an air inlet at the second end of the cap body; and

a sealing portion connected with the lid body, the sealing portion covering a portion of the air inlet.

9. A compressor, characterized in that the compressor comprises:

the cylinder head according to any one of claims 1 to 8.

10. The compressor of claim 9, further comprising:

the cylinder cover is positioned in the shell and is matched with the shell.

11. The compressor of claim 10,

taking any point on the outer wall surface of the cover body of the cylinder cover, and marking the point as a first point, wherein the distance between the first point and the inner wall surface of the shell is more than or equal to 4mm and less than or equal to 8 mm; and/or

And taking any point on the outer wall surface of the bulge of the cylinder cover as a second point, wherein the distance between the second point and the inner wall surface of the shell is more than or equal to 3mm and less than or equal to 7 mm.

12. A refrigeration appliance, characterized in that it comprises:

the cylinder head of any one of claims 1 to 8; or

A compressor as claimed in any one of claims 9 to 11.

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