Compressor and refrigeration equipment

Abstract

The utility model discloses a compressor and refrigeration equipment, the compressor comprises a crankcase, a valve plate assembly, a cylinder cover, at least one exhaust cover, a fastener and a silencer, the cylinder cover is provided with an exhaust cavity and at least one first fixing hole communicated with the exhaust cavity; the exhaust cover is installed on the cylinder cover and located at the first fixing hole, the exhaust cover is provided with an inner cavity, the inner cavity penetrates through the end faces of the two ends of the exhaust cover and communicates with the first fixing hole, and one end of the exhaust cover is in sealing fit with the cylinder cover; the fastener penetrates through the inner cavity and the first fixing hole and is used for being fixedly connected with a crankcase of the compressor, the fastener, at least part of the inner peripheral wall of the inner cavity and at least part of the inner peripheral wall of the first fixing hole are arranged at intervals, and the fastener is in sealing fit with the other end of the exhaust cover; the silencer is located on the outer side of the crankcase and connected with the exhaust cover through a first exhaust pipe. According to the compressor, the heat loss of a refrigerant in the exhaust process can be reduced, the problem of overheating of sucked air is avoided, and the efficiency of the compressor is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, especially a kind of compressor and refrigeration equipment. BACKGROUND

[0002] The exhaust cavity of the cylinder head of the traditional reciprocating compressor is connected with the exhaust assembly through the flow-through hole in the crankcase, so that, during the operation of the compressor, when the high-temperature refrigerant after compression flows through the flow-through hole, the high-temperature refrigerant will emit a large amount of heat to the inside of the crankcase, and the heat is further conducted into the compression chamber of the cylinder, resulting in the problems of heat loss of the refrigerant during the exhaust process and causing the suction gas to be overheated, which further leads to the low efficiency of the compressor. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in prior art. For this purpose, the utility model provides a compressor, which can reduce the heat loss of the refrigerant during the exhaust process, avoid the problem of overheating of the suction gas, and effectively improve the efficiency of the compressor.

[0004] The utility model further provides a refrigeration equipment with the above-mentioned compressor.

[0005] According to the compressor of the first aspect of the utility model, the compressor comprises a crankcase, a valve plate assembly installed in the crankcase and located at the opening of the compression chamber, a cylinder head installed in the valve plate assembly, the cylinder head being provided with an exhaust cavity and at least one first fixed hole communicating with the exhaust cavity, the exhaust cavity being communicated or blocked with the compression chamber through the valve plate assembly, at least one exhaust cover installed in the cylinder head and located at the first fixed hole, the exhaust cover being provided with an inner cavity, the inner cavity penetrating the end faces of both ends of the exhaust cover, and the inner cavity being communicated with the first fixed hole, one end of the exhaust cover being sealingly matched with the cylinder head, a fastener penetrating the inner cavity and the first fixed hole, the fastener being used for fixedly connecting with the crankcase of the compressor, the fastener being arranged in space with at least part of the inner peripheral wall of the inner cavity and at least part of the inner peripheral wall of the first fixed hole, the fastener being sealingly matched with the other end of the exhaust cover, a first exhaust pipe, and a silencer located outside the crankcase and connected with the exhaust cover through the first exhaust pipe.

[0006] The compressor according to the first aspect of the present application has at least the following beneficial effects: the exhaust cover is installed at the first fixing hole of the cylinder cover, the exhaust cover is connected with the silencer through the first exhaust pipe, during the exhaust process, the refrigerant is discharged from the exhaust cavity to the silencer through the first fixing hole, the inner cavity of the exhaust cover and the first exhaust pipe, and is further discharged to the outside of the compressor, on the one hand, the silencer can reduce the pulsation of the refrigerant during the exhaust process, effectively reduces the exhaust noise, on the other hand, the refrigerant is discharged from the exhaust cavity to the silencer without flowing through the inside of the crankcase, which is beneficial to simplify the structure of the crankcase, improve the reliability, and reduce the heat transferred from the refrigerant to the crankcase, which is beneficial to reduce the exhaust pressure loss and heat loss, and avoid the problem of overheating of the suction, thereby effectively improving the efficiency of the compressor.

[0007] According to some embodiments of the present application, the cylinder cover is provided with a plurality of first fixing holes, the plurality of first fixing holes are respectively communicated with the exhaust cavity, the number of the exhaust covers is equal to the number of the first fixing holes, and the plurality of exhaust covers are respectively installed at the plurality of first fixing holes.

[0008] According to some embodiments of the present application, the first fixing hole is located at the side of the exhaust cavity, the cylinder cover is further provided with a recess, the recess is located between the first fixing hole and the exhaust cavity, and the recess penetrates part of the inner wall of the first fixing hole and part of the inner wall of the exhaust cavity.

[0009] According to some embodiments of the present application, the width of the recess increases from the first fixing hole to the exhaust cavity.

[0010] According to some embodiments of the present application, the inner cavity comprises a flow cavity and a matching cavity which are communicated with each other, one end of the flow cavity is communicated with the first fixing hole, the matching cavity is located at the other end of the flow cavity, the minimum inner diameter of the matching cavity is smaller than that of the flow cavity, and the first exhaust pipe is connected to the peripheral wall of the flow cavity.

[0011] According to some embodiments of the present application, the compressor further comprises a sealing piece, the sealing piece is arranged between the exhaust cover and the cylinder cover, and the sealing piece surrounds the fastener.

[0012] According to some embodiments of the present application, one end of the exhaust cover away from the cylinder cover is provided with an annular boss, the annular boss surrounds the fastener, the fastener comprises a rod portion and a head portion connected to one end of the rod portion, the rod portion is arranged in the inner cavity and the first fixing hole, the head portion is located at one end of the exhaust cover away from the cylinder cover, and the two end faces of the head portion arranged opposite to the annular boss are mutually adhered.

[0013] According to some embodiments of the present application, the compressor further comprises an outer exhaust pipe and a second exhaust pipe, two ends of the second exhaust pipe are connected with the muffler and the outer exhaust pipe respectively, and the second exhaust pipe comprises a plurality of curved pipe sections connected in sequence.

[0014] According to some embodiments of the present application, an outer peripheral wall of at least one of the first exhaust pipe, the second exhaust pipe and the muffler is provided with a heat insulation layer.

[0015] The refrigeration equipment according to the second aspect of the present application comprises the compressor according to the first aspect of the present application.

[0016] The refrigeration equipment according to the second aspect of the present application has at least the following beneficial effects: the refrigeration equipment adopts the compressor described above, the exhaust cover is installed at the first fixing hole of the cylinder cover, the exhaust cover is connected with the muffler through the first exhaust pipe, and in the exhaust process, the refrigerant is discharged from the exhaust cavity to the muffler through the first fixing hole, the inner cavity of the exhaust cover and the first exhaust pipe, and then to the outside of the compressor. On the one hand, the muffler can reduce the pulsation of the refrigerant in the exhaust process, effectively reducing the exhaust noise, on the other hand, the refrigerant is discharged from the exhaust cavity to the muffling cavity without flowing through the inside of the crankcase, which is beneficial to simplify the structure of the crankcase, improve the reliability, and reduce the heat transferred from the refrigerant to the crankcase, which is beneficial to reduce the exhaust pressure loss and heat loss, and avoid the problem of overheating of the suction air, thereby effectively improving the efficiency of the compressor.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in combination with the drawings and embodiments, in which:

[0019] Figure 1 is a schematic view of a partial structure inside the compressor in an embodiment of the present application;

[0020] Figure 2 is Figure 1 a top view of the partial structure of the compressor shown in FIG.

[0021] Figure 3 is Figure 2 a sectional view at A-A in FIG.

[0022] Figure 4 is Figure 3 an enlarged view at B in FIG.

[0023] Figure 5is a structure diagram of a cylinder head of a compressor according to another embodiment of the utility model.

[0024] Figure 6 is a sectional view of an exhaust cover according to an embodiment of the utility model.

[0025] Reference signs:

[0026] Cylinder head 100 Exhaust chamber 110 Second wall surface 111 First fixing hole 120 First wall surface 121 Concave part 130 First side wall 131 Second side wall 132 Second fixing hole 140 Sealing member 150

[0027] Exhaust cover 200 Inner cavity 210 Flow-through cavity 211 Mating cavity 212 Annular boss 220

[0028] Fastener 300 Shank 310 Head 320

[0029] Silencer 400 First exhaust pipe 410 Second exhaust pipe 420

[0030] Crankcase 500 Cylinder block 510 Valve plate assembly 520 Shaft hole 530 DETAILED DESCRIPTION

[0031] Embodiments of the utility model are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0032] In the description of the utility model, it is understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as limiting the utility model.

[0033] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0034] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting, assembling, cooperating should be understood in a broad sense, and the skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0035] Referring to Figures 1 to 6 The utility model discloses a compressor, be applied to refrigeration equipment, the refrigeration equipment here can be refrigerator, refrigerator etc.

[0036] Referring to Figure 1 And Figure 2 It can be understood that, generally speaking, the compressor includes a crankcase 500, a motor assembly, a crankshaft, a piston, a valve plate assembly 520 and an outer exhaust pipe, wherein the crankcase 500 is provided with a shaft hole 530, and the crankcase 500 includes a cylinder body 510 located at a radial side of the shaft hole 530, the cylinder body 510 is provided with a compression chamber, and the valve plate assembly 520 is installed on the cylinder body 510 and located at one end of the compression chamber away from the shaft hole 530. The piston is slidingly installed in the compression chamber, the crankshaft is rotatably installed in the shaft hole 530, one end of the crankshaft is connected with the motor assembly, the other end is provided with an eccentric portion, and the eccentric portion is hinged with the piston through a connecting rod. Therefore, the motor assembly drives the crankshaft to rotate, and the crankshaft can drive the piston to reciprocate in the compression chamber through the connecting rod to realize compression work on the refrigerant.

[0037] Referring to Figure 1 It can be understood that the compressor further includes a cylinder head 100, at least one exhaust cover 200, a fastener 300 and a muffler 400.

[0038] Referring to Figure 1 It can be understood that, correspondingly, the cylinder head 100 is provided with a first fixing hole 120 equal in number to the exhaust cover 200. The cylinder head 100 is installed on the side of the valve plate assembly 520 away from the cylinder body 510. The cylinder head 100 is also provided with an exhaust chamber 110, the opening of the exhaust chamber 110 faces the valve plate assembly 520, and the exhaust chamber 110 is communicated or blocked with the compression chamber through the valve plate assembly 520. In the embodiment, the number of exhaust covers 200 and first fixing holes 120 is two.

[0039] Next, one set of corresponding first fixing holes 120 and exhaust covers 200 will be described in detail.

[0040] Referring to Figure 4 And Figure 5As shown, it can be understood that the first fixed hole 120 is in communication with the exhaust cavity 110. Specifically, the first fixed hole 120 is located at the outer peripheral side of the exhaust cavity 110, and the first fixed hole 120 is a through hole and penetrates the cylinder head 100 towards the end surface of the valve plate assembly 520. The inner peripheral wall defining the first fixed hole 120 is a first wall surface 121, and the inner peripheral wall of the exhaust cavity 110 includes a second wall surface 111 close to the first fixed hole 120. The side end surface of the cylinder head 100 towards the valve plate assembly 520 is further provided with a recess 130, the recess 130 is located between the first fixed hole 120 and the exhaust cavity 110, and the recess 130 penetrates the first wall surface 121 and the second wall surface 111. In this way, the recess 130 provides the function of a communication groove, so that the first fixed hole 120 communicates with the exhaust cavity 110 through the recess 130.

[0041] In other embodiments, it can be understood that the first fixed hole 120 can be arranged at the side of the exhaust cavity 110 away from the valve plate assembly 520, and the end of the first fixed hole 120 towards the exhaust cavity 110 penetrates the inner peripheral wall of the exhaust cavity 110. In this way, the first fixed hole 120 directly communicates with the exhaust cavity 110 at the end.

[0042] Referring to Figure 3 and Figure 4 As shown, it can be understood that the exhaust cover 200 is generally in the form of a sleeve structure, the exhaust cover 200 is mounted at the side of the cylinder head 100 away from the valve plate assembly 520, and the exhaust cover 200 is located at the first fixed hole 120, i.e. the exhaust cover 200 is arranged corresponding to the first fixed hole 120. The exhaust cover 200 is provided with an inner cavity 210, the inner cavity 210 penetrates the exhaust cover 200 along the end surfaces of the two ends of the first fixed hole 120 in the axial direction, so that the inner cavity 210 is in communication with the first fixed hole 120. At the same time, the end of the exhaust cover 200 towards the cylinder head 100 is sealingly fitted with the cylinder head 100, for example, the exhaust cover 200 and the cylinder head 100 are filled with sealing glue or mounted with a sealing ring, etc., to avoid the leakage of refrigerant from the gap between the exhaust cover 200 and the cylinder head 100 during the exhaust process, thereby affecting the efficiency and performance of the compressor.

[0043] Referring to Figure 4As shown, it can be understood that, in general, the valve plate assembly 520 is provided with a fixing hole axially corresponding to the first fixing hole 120, and the cylinder body 510 is provided with a connecting hole axially corresponding to the first fixing hole 120. The fastener 300 can be a screw or a bolt, etc. The fastener 300 is sequentially arranged in the inner cavity 210 of the exhaust cover 200, the first fixing hole 120, the fixing hole of the valve plate assembly 520 and the connecting hole of the cylinder body 510, and the fastener 300 is fastened and connected with the cylinder body 510. Therefore, the exhaust cover 200 is fixedly installed on the cylinder cover 100, and the cylinder cover 100 is fixedly installed on the valve plate assembly 520 and the cylinder body 510. For example, the fastener 300 is a screw, the connecting hole of the cylinder body 510 is a threaded hole matched with the screw, and the fastener 300 is threadedly connected with the cylinder body 510. Alternatively, the fastener 300 is a bolt, the connecting hole of the cylinder body 510 is a through hole, the fastener 300 passes through the connecting hole of the cylinder body 510 and is fastened and connected with the cylinder body 510. It can be easily understood that, similarly, the fastener 300 is sealingly fitted between the end of the exhaust cover 200 away from the cylinder cover 100, for example, the exhaust cover 200 is filled with sealant or mounted with a sealing ring, etc. between the fastener 300, so as to avoid leakage of refrigerant from the gap between the exhaust cover 200 and the fastener 300 during the exhaust process, thereby affecting the efficiency and performance of the compressor.

[0044] It can be easily understood that, with reference to Figure 5 In order to improve the installation stability of the cylinder cover 100, in general, the cylinder cover 100 is also provided with a plurality of second fixing holes 140, and the plurality of second fixing holes 140 are located on the outer circumferential side of the exhaust cavity 110. The first fixing hole 120 and the plurality of second fixing holes 140 are arranged at intervals along the circumference of the exhaust cavity 110. The valve plate assembly 520 is provided with a fixing hole axially corresponding to the second fixing hole 140, and the cylinder body 510 is provided with a connecting hole axially corresponding to the second fixing hole 140. Similarly, the fastener 300 is sequentially arranged in the second fixing hole 140, the fixing hole of the valve plate assembly 520 and the connecting hole of the cylinder body 510, and the fastener 300 is fastened and connected with the cylinder body 510. Thus, the installation stability of the cylinder cover 100 is improved. In the embodiment, the number of second fixing holes 140 is two, that is, the sum of the number of first fixing holes 120 and second fixing holes 140 is four, and the four fixing holes are respectively located at four corner positions of the cylinder cover 100, so as to ensure the installation stability of the cylinder cover 100. Of course, the sum of the number of first fixing holes 120 and second fixing holes 140 can also be three, five, six or more, as long as the installation stability of the cylinder cover 100 is ensured.

[0045] With reference to Figure 4As shown, it can be understood that, in order to avoid the fastener 300 blocking the inner cavity 210 and the first fixing hole 120, the outer peripheral wall of the part of the fastener 300 extending into the inner cavity 210 is arranged spaced apart from at least part of the inner peripheral wall of the inner cavity 210, and the outer peripheral wall of the part of the fastener 300 extending into the first fixing hole 120 is arranged spaced apart from at least part of the inner peripheral wall of the first fixing hole 120. Specifically, the outer peripheral wall of the part of the fastener 300 extending into the inner cavity 210 is arranged spaced apart from the inner peripheral wall of the inner cavity 210, i.e. an annular groove is formed between the fastener 300 and the inner peripheral wall of the inner cavity 210. Similarly, the outer peripheral wall of the part of the fastener 300 extending into the first fixing hole 120 is arranged spaced apart from the inner peripheral wall of the first fixing hole 120, i.e. an annular groove is formed between the fastener 300 and the inner peripheral wall of the first fixing hole 120. Thus, the inner cavity 210, the first fixing hole 120 and the exhaust cavity 110 are in communication.

[0046] In other embodiments, one side of the outer peripheral wall of the part of the fastener 300 extending into the inner cavity 210 is attached to the inner peripheral wall of the inner cavity 210, and the other side of the outer peripheral wall is arranged spaced apart from the inner peripheral wall of the inner cavity 210. Similarly, one side of the outer peripheral wall of the part of the fastener 300 extending into the first fixing hole 120 is attached to the inner peripheral wall of the first fixing hole 120, and the other side of the outer peripheral wall is arranged spaced apart from the inner peripheral wall of the first fixing hole 120. In this way, the inner cavity 210, the first fixing hole 120 and the exhaust cavity 110 can also be in communication.

[0047] Referring to Figure 1 and Figure 2 As shown, it can be understood that the muffler 400 is located outside the crankcase 500, and the muffler 400 is connected with the exhaust cover 200 through the first exhaust pipe 410. Specifically, the side wall of the exhaust cover 200 is provided with a through hole in communication with the inner cavity 210, one end of the first exhaust pipe 410 is connected to the through hole of the outer peripheral wall of the exhaust cover 200, so that the first exhaust pipe 410 is in communication with the inner cavity 210, the other end of the first exhaust pipe 410 is connected with one end of the muffler 400, and the other end of the muffler 400 is connected with the outer exhaust pipe through the second exhaust pipe 420. The second exhaust pipe 420 is composed of a plurality of curved pipe segments connected in sequence, which is conducive to reducing exhaust noise.

[0048] It can be understood that the exhaust cover 200 and the first exhaust pipe 410, the first exhaust pipe 410 and the muffler 400, the muffler 400 and the second exhaust pipe 420, and the second exhaust pipe 420 and the outer exhaust pipe are all fixed by welding, which is stable and reliable in connection and good in sealing, avoiding gas leakage and affecting the efficiency and performance of the compressor.

[0049] Therefore, during the exhaust process, the refrigerant is discharged from the exhaust cavity 110 to the muffler 400 through the first fixed hole 120, the inner cavity 210 of the exhaust cover 200 and the first exhaust pipe 410, and then to the outside of the compressor. On the one hand, the muffler 400 can reduce the pulsation of the refrigerant during the exhaust process, effectively reducing the exhaust noise. On the other hand, the refrigerant is discharged from the exhaust cavity 110 to the muffler cavity without flowing through the inside of the crankcase 500, which is beneficial to simplify the structure of the crankcase 500, improve the reliability, and reduce the heat transferred from the refrigerant to the crankcase 500, which is beneficial to reduce the exhaust pressure loss and heat loss, and avoid the problem of superheating of the suction gas, thereby effectively improving the efficiency of the compressor.

[0050] It can be understood that in other embodiments, the cylinder head 100 is provided with one, three or more first fixed holes 120, for example, the cylinder head 100 is provided with three first fixed holes 120. It is easy to understand that in order to ensure the stability of the installation of the cylinder head 100, at this time, the cylinder head 100 is also provided with a second fixed hole 140, which will not be described here.

[0051] Referring to Figure 1 It can be understood that in the present embodiment, the two first fixed holes 120 are in communication with the exhaust cavity 110, and the communication structure of the two first fixed holes 120 with the exhaust cavity 110 can be referred to the above description. Correspondingly, the number of exhaust covers 200 is equal to the number of first fixed holes 120, and the number of exhaust covers 200 is two, and the two exhaust covers 200 are respectively installed at the two first fixed holes 120, and the fixing mode of the two exhaust covers 200 can be referred to the above description. The two exhaust covers 200 are connected with the muffler 400 through a first exhaust pipe 410, that is, the number of first exhaust pipes 410 is equal to the number of exhaust covers 200. Therefore, during the exhaust process, the refrigerant in the exhaust cavity 110 can be discharged to the muffler 400 through the two first fixed holes 120, the inner cavities 210 of the two exhaust covers 200 and the two first exhaust pipes 410, thereby increasing the flow area, which is beneficial to reduce the noise and effectively improve the efficiency of the compressor.

[0052] In other embodiments, the number of first fixed holes 120 can also be three, four or more, which is beneficial to further increase the flow area, reduce the noise and improve the efficiency of the compressor. It is easy to understand that when the cylinder head 100 is firmly installed by the fastener 300 penetrating the plurality of first fixed holes 120, the cylinder head 100 can not be provided with a second fixed hole 140.

[0053] It can be understood that the outer peripheral wall of at least one of the first exhaust pipe 410, the muffler 400 and the second exhaust pipe 420 is provided with a heat insulation layer. In the embodiment, the outer peripheral wall of the first exhaust pipe 410, the muffler 400 and the second exhaust pipe 420 is provided with a heat insulation layer, and the material of the heat insulation layer can be polybutylene terephthalate, polytetrafluoroethylene or silicone rubber, etc. Such materials have good heat insulation performance and oil and refrigerant compatibility, effectively prolonging the service life. At the same time, by setting the heat insulation layer, the heat loss of the refrigerant during the exhaust process can be reduced, thereby reducing the exhaust pressure loss and heat loss, and to some extent, reducing the heat transferred from the refrigerant to the crankcase 500, avoiding the problem of overheating of the suction, thereby effectively improving the efficiency of the compressor.

[0054] It can be understood that the heat insulation layer can be coated on the outer peripheral wall of the first exhaust pipe 410, the muffler 400 and the second exhaust pipe 420 by spraying or soaking, etc.

[0055] In other embodiments, the first exhaust pipe 410, the muffler 400 and the second exhaust pipe 420 can be that only the outer peripheral wall of one of them is provided with a heat insulation layer, or the outer peripheral wall of any two of them is provided with a heat insulation layer.

[0056] Referring to Figure 5 It can be understood that generally, the space of the exhaust cavity 110 is much larger than that of the first fixed hole 120. Therefore, the width of the recess 130 increases from the first fixed hole 120 to the exhaust cavity 110. It is easy to understand that the recess 130 has two oppositely arranged side walls, namely the first side wall 131 and the second side wall 132, which are located on both sides of the through hole formed by the recess 130 penetrating the first wall surface 121, and the width of the recess 130 is the distance between the first side wall 131 and the second side wall 132. That is, the cross section of the recess 130 is substantially fan ring shaped. The width of the through hole at one end of the recess 130 communicating with the exhaust cavity 110 is greater than that of the through hole at one end of the recess 130 communicating with the first fixed hole 120. Therefore, the recess 130 can converge the refrigerant in the larger space of the exhaust cavity 110 into the smaller space of the first fixed hole 120, which is beneficial to reduce the flow resistance of the refrigerant, i.e. to reduce the exhaust resistance, thereby being beneficial to reduce the noise.

[0057] Referring to Figure 4 and Figure 6As shown, it can be understood that the inner cavity 210 comprises a flow-through cavity 211 and a matching cavity 212 which are in communication with each other, wherein the matching cavity 212 is located at an end of the flow-through cavity 211 away from the first fixing hole 120. One end of the flow-through cavity 211 is in communication with the first fixing hole 120, and the other end is in communication with the matching cavity 212. It can be easily understood that the minimum inner diameter of the matching cavity 212 is smaller than the minimum inner diameter of the flow-through cavity 211. Generally, the minimum inner diameter of the flow-through cavity 211 is equal to the inner diameter of the first fixing hole 120, and the minimum inner diameter of the flow-through cavity 211 is greater than the outer diameter of the portion of the fastener 300 extending into the flow-through cavity 211, and the minimum inner diameter of the matching cavity 212 is slightly greater than or equal to the outer diameter of the portion of the fastener 300 extending into the matching cavity 212. Therefore, a relatively large flow-through space is formed between the inner peripheral wall of the flow-through cavity 211 and the outer peripheral wall of the portion of the fastener 300 extending into the flow-through cavity 211, so as to allow the refrigerant to pass through and reduce the exhaust resistance. The space between the inner peripheral wall of the matching cavity 212 and the outer peripheral wall of the portion of the fastener 300 extending into the matching cavity 212 is relatively small, and the gas flow resistance is relatively large, which is beneficial to improve the sealing performance of the fastener 300 and the end of the exhaust cover 200 away from the cylinder cover 100.

[0058] In other embodiments, it can be understood that the inner cavity 210 can be a through hole structure with equal inner diameters, which is convenient for processing and production, and only needs to ensure the sealing performance of the fastener 300 and the end of the exhaust cover 200 away from the cylinder cover 100.

[0059] Referring to Figure 4 As shown, it can be understood that the compressor further comprises a sealing member 150. Specifically, the sealing member 150 is a sealing ring or a sealing ring, and the sealing member 150 is sleeved on the fastener 300, that is, the sealing member 150 is arranged around the fastener 300. The sealing member 150 is arranged between the exhaust cover 200 and the cylinder cover 100, that is, the sealing member 150 is clamped between the exhaust cover 200 and the cylinder cover 100. Along the axial direction of the first fixing hole 120, the two end faces of the sealing member 150 away from each other abut against the end face of the exhaust cover 200 toward the cylinder cover 100 and the end face of the cylinder cover 100 located at the end of the first fixing hole 120 toward the exhaust cover 200. Therefore, when the fastener 300 is fastened and connected with the cylinder body 510, the exhaust cover 200 and the cylinder cover 100 clamp the sealing member 150, and the sealing member 150 fills the gap between the exhaust cover 200 and the cylinder cover 100. In this way, the sealing performance between the exhaust cover 200 and the cylinder cover 100 is improved, and leakage of the refrigerant from the gap between the exhaust cover 200 and the cylinder cover 100 during the exhaust process is avoided, thereby effectively ensuring the efficiency of the compressor.

[0060] In other embodiments, the sealant 150 can also be a sealant glue, which is applied to the end face of the end of the exhaust cover 200 facing the cylinder head 100 before the exhaust cover 200 is installed, and is arranged around the inner cavity 210, and is also applied to the end face of the end of the cylinder head 100 facing the exhaust cover 200, and is arranged around the first fixing hole 120. After the exhaust cover 200 is installed to the cylinder head 100, the sealant is sandwiched between the exhaust cover 200 and the cylinder head 100, so as to ensure the sealing between the exhaust cover 200 and the cylinder head 100, and effectively ensure the efficiency of the compressor.

[0061] Referring to Figure 4 It can be understood that the fastener 300 is configured as a screw, and specifically, the fastener 300 includes a rod portion 310 and a head portion 320, wherein the head portion 320 is connected to one end of the rod portion 310. When the fastener 300 is connected to the cylinder body 510, the rod portion 310 is arranged through the inner cavity 210 and the first fixing hole 120 of the exhaust cover 200, and the head portion 320 is located at the end of the exhaust cover 200 away from the cylinder head 100 and abuts against the end of the exhaust cover 200 away from the cylinder head 100.

[0062] Referring to Figure 4 and Figure 6 It can be understood that the end of the exhaust cover 200 away from the cylinder head 100 is provided with an annular boss 220, which is arranged around the opening of the inner cavity 210. When the fastener 300 is arranged through the inner cavity 210, the annular boss 220 is arranged around the rod portion 310 of the fastener 300. When the fastener 300 is connected to the cylinder body 510, the head portion 320 of the fastener 300 abuts against the annular boss 220, and the two end faces of the annular boss 220 opposite to the head portion 320 of the fastener 300 are flat and parallel, and the two end faces of the annular boss 220 opposite to the head portion 320 of the fastener 300 abut against each other. Therefore, the head portion 320 of the fastener 300 and the end of the exhaust cover 200 away from the cylinder head 100 are sealed and matched by the end face sealing mode, so as to improve the sealing between the head portion 320 and the exhaust cover 200, avoid leakage of refrigerant from the gap between the exhaust cover 200 and the head portion 320 during the exhaust process, and effectively ensure the efficiency of the compressor.

[0063] In other embodiments, it can be understood that the head portion 320 and the exhaust cover 200 can also be sealed in the form of a sealing ring or a sealing ring, or in the form of applying a sealant, or in the form of arranging the annular boss 220 in combination with the sealing ring or the sealing ring or the sealant. It is only necessary to ensure that the sealing between the head portion 320 and the exhaust cover 200 meets the set requirements.

[0064] The refrigeration equipment can be a refrigerator, a freezer or the like.

[0065] The refrigeration equipment has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments.

[0066] The above-mentioned embodiments of the present application are described in detail in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. Compressor, characterized in that, The compressor comprises: a crankcase provided with a compression chamber; a valve plate assembly installed on the crankcase and located at an opening of the compression chamber; a cylinder head installed on the valve plate assembly, the cylinder head being provided with an exhaust chamber and at least one first fixed hole in communication with the exhaust chamber, the exhaust chamber being in communication with or blocked from the compression chamber through the valve plate assembly; at least one exhaust cover installed on the cylinder head and located at the first fixed hole, the exhaust cover being provided with an inner chamber, the inner chamber penetrating through end faces of two ends of the exhaust cover and being in communication with the first fixed hole, one end of the exhaust cover being in sealing engagement with the cylinder head; a fastener penetrating through the inner chamber and the first fixed hole, the fastener being used for fixed connection with the crankcase of the compressor, the fastener being arranged in space with at least part of an inner peripheral wall of the inner chamber and at least part of an inner peripheral wall of the first fixed hole, the fastener being in sealing engagement with the other end of the exhaust cover; a first exhaust pipe; a muffler located outside the crankcase and connected with the exhaust cover through the first exhaust pipe.

2. The compressor of claim 1, wherein: The cylinder head is provided with a plurality of first fixed holes in communication with the exhaust chamber respectively, the number of exhaust covers is equal to the number of first fixed holes, and the plurality of exhaust covers are respectively installed on the plurality of first fixed holes and connected with the muffler respectively.

3. The compressor of claim 1 or 2, characterized in that: The first fixed hole is located at a peripheral side of the exhaust chamber, the cylinder head is further provided with a recess, the recess is located between the first fixed hole and the exhaust chamber, and the recess penetrates through part of an inner peripheral wall of the first fixed hole and part of an inner peripheral wall of the exhaust chamber.

4. The compressor of claim 3, wherein: The width of the recess increases in the direction from the first fixed hole to the exhaust chamber.

5. The compressor of claim 1 or 2, wherein: The inner chamber comprises a flow-through chamber and a fitting chamber in communication with each other, one end of the flow-through chamber is in communication with the first fixed hole, the fitting chamber is located at the other end of the flow-through chamber, the minimum inner diameter of the fitting chamber is smaller than that of the flow-through chamber, and the first exhaust pipe is connected with a peripheral wall of the flow-through chamber.

6. The compressor of claim 1 or 2, wherein: The compressor further comprises a sealing member arranged between the exhaust cover and the cylinder head and surrounding the fastener.

7. The compressor of claim 1 or 2, wherein: One end of the exhaust cover away from the cylinder head is provided with an annular boss, the annular boss surrounds the fastener, the fastener comprises a rod portion and a head portion connected to one end of the rod portion, the rod portion penetrates through the inner chamber and the first fixed hole, the head portion is located at one end of the exhaust cover away from the cylinder head, and the head portion is in abutment with two end faces of the annular boss arranged oppositely.

8. The compressor of claim 1, wherein: The compressor further comprises an outer exhaust pipe and a second exhaust pipe, two ends of the second exhaust pipe are connected with the muffler and the outer exhaust pipe respectively, and the second exhaust pipe comprises a plurality of curved pipe sections connected in sequence.

9. The compressor of claim 8, wherein: An outer peripheral wall of at least one of the first exhaust pipe, the second exhaust pipe and the muffler is provided with a heat insulation layer.

10. A refrigeration appliance characterised in that, The compressor comprises any one of claims 1 to 9.

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