Compressor and electrical equipment

Abstract

The utility model discloses a compressor and electrical equipment, the compressor comprises a shell, an outer exhaust pipe, a crankcase, a first gas path, a second gas path and at least one silencer, the crankcase is provided with at least two buffer cavities; the first gas path comprises one buffer cavity or a part of buffer cavities which are communicated in sequence; the second gas path comprises another buffer cavity or another part of buffer cavities which are communicated in sequence; the first gas path and the second gas path are sequentially communicated with the external exhaust pipe; or the first gas path and the second gas path are connected in parallel and are respectively communicated with the external exhaust pipe; wherein a connecting pipe is connected between every two adjacent buffer cavities which are communicated with each other, a connecting pipe is connected between the buffer cavity and the outer exhaust pipe which are communicated with each other, and at least one connecting pipe is connected with a silencer. The compressor can reduce exhaust pulsation and improve stability of exhaust airflow, and therefore vibration and noise are reduced.

Description

TECHNICAL FIELD

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

[0002] The crankcase of traditional reciprocating compressor generally adopts single buffer chamber or double buffer chamber structure to realize miniaturization and high cost performance. However, under the high exhaust pressure and large flow condition of compressor, the damping and noise reduction function of single buffer chamber or double buffer chamber is very limited. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art. Therefore, the utility model provides a kind of compressor, can reduce exhaust pulsation, improve the stability of exhaust gas flow, to reduce vibration and noise.

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

[0005] According to the compressor of the first aspect embodiment of the utility model, at least have following beneficial effects: by setting at least two buffer chambers and connecting at least one silencer, during the exhaust process, refrigerant flows through at least two buffer chambers and at least one silencer, buffer chamber and silencer can slow down the airflow pulsation during the exhaust process, to realize the stability of exhaust gas flow, reduce the vibration and noise generated by airflow pulsation, reduce energy loss, and further improve the energy efficiency of compressor.

[0006] According to the compressor of the first aspect embodiment of the utility model, at least have following beneficial effects: by setting at least two buffer chambers and connecting at least one silencer, during the exhaust process, refrigerant flows through at least two buffer chambers and at least one silencer, buffer chamber and silencer can slow down the airflow pulsation during the exhaust process, to realize the stability of exhaust gas flow, reduce the vibration and noise generated by airflow pulsation, reduce energy loss, and further improve the energy efficiency of compressor.

[0007] According to some embodiments of the present application, the compressor further comprises a cylinder head, the cylinder head is installed at the end of the compression cylinder body, the cylinder head is provided with an exhaust cavity, the crankcase is provided with one overflow hole, if the first gas path, the second gas path and the outer exhaust pipe are sequentially communicated, the exhaust cavity, the overflow hole and the first gas path are sequentially communicated.

[0008] According to some embodiments of the present application, the compressor further comprises a cylinder head, the cylinder head is installed at the end of the compression cylinder body, the cylinder head is provided with an exhaust cavity, the crankcase is provided with two overflow holes, if the first gas path and the second gas path are parallel, the exhaust cavity is communicated with the first gas path through one of the overflow holes, and the exhaust cavity is communicated with the second gas path through the other overflow hole.

[0009] According to some embodiments of the present application, the minimum inner diameter of the overflow hole is greater than the minimum inner diameter of the connecting pipe.

[0010] According to some embodiments of the present application, the number of the buffer cavities of the second gas path is equal to or differs by 1 from the number of the buffer cavities of the first gas path.

[0011] According to some embodiments of the present application, the number of the buffer cavities is even, and the plurality of buffer cavities are divided into two groups and arranged on the two sides of the body part along the radial direction of the compression cylinder body.

[0012] According to some embodiments of the present application, the number of the buffer cavities is odd, one of the buffer cavities is arranged on the body part and located on the side away from the compression cylinder body along the radial direction of the shaft hole, and the remaining plurality of buffer cavities are divided into two groups and arranged on the two sides of the body part along the radial direction of the compression cylinder body.

[0013] According to some embodiments of the present application, the central axis of the shaft hole and the central axis of the compression cylinder body are coplanar and determine a reference plane, and the two groups of buffer cavities located on the two sides of the body part along the radial direction of the compression cylinder body are symmetrically arranged about the reference plane.

[0014] According to some embodiments of the present application, the muffler comprises a shell, the shell is arranged in a spaced manner with the crankcase, the shell defines a muffling cavity, and the shell is provided with an air inlet and an air outlet communicating with the muffling cavity; and / or, the buffer cavity is configured as a cylindrical structure with an opening upward.

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

[0016] The electric appliance equipment according to the second aspect of the utility model has at least the following beneficial effects: the electric appliance equipment adopts the compressor, at least two buffer cavities and at least one silencer are arranged, during the exhaust process, the refrigerant flows through the at least two buffer cavities and the at least one silencer, the buffer cavity and the silencer can slow down the airflow pulsation during the exhaust process, thereby improving the stability of the exhaust airflow, reducing the vibration and noise caused by the airflow pulsation, reducing the energy loss, and further improving the energy efficiency of the compressor.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in connection with the drawings and examples, wherein:

[0019] Figure 1 is the exploded schematic view of the compressor in some embodiments of the utility model;

[0020] Figure 2 is the structural schematic view of the crankcase in some embodiments of the utility model;

[0021] Figure 3 is the structural schematic view of the crankcase in some other embodiments of the utility model;

[0022] Figure 4 is the structural schematic view of the crankcase in some other embodiments of the utility model;

[0023] Figure 5 is the connection schematic view of two buffer cavities in some embodiments of the utility model;

[0024] Figure 6 is the connection schematic view of two buffer cavities in some other embodiments of the utility model;

[0025] Figure 7 is the connection schematic view of three buffer cavities in some embodiments of the utility model;

[0026] Figure 8 is the connection schematic view of three buffer cavities in some other embodiments of the utility model;

[0027] Figure 9 is the connection schematic view of four buffer cavities in some embodiments of the utility model;

[0028] Figure 10 is the connection schematic view of four buffer cavities in some other embodiments of the utility model;

[0029] Figure 11is a connection diagram of five buffer cavities in some embodiments of the utility model;

[0030] Figure 12 is a connection diagram of five buffer cavities in some embodiments of the utility model;

[0031] Figure 13 is a P-V diagram of the working process of the compressor under high exhaust pressure and large flow conditions in the embodiments of the utility model.

[0032] Reference signs:

[0033] Crankcase 100; body part 110; shaft hole 111; compression cylinder 120; through-flow hole 121; compression cavity 122; exhaust cylinder 130; buffer cavity 131; cavity cover 132;

[0034] Housing 200; crankshaft 210; valve plate assembly 220; cylinder head 230; connecting rod 240; connecting pipe 250; outer exhaust pipe 260; muffler 270;

[0035] First gas path 300;

[0036] Second gas path 400;

[0037] Reference plane Z. DETAILED DESCRIPTION

[0038] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with 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.

[0039] 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 specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as limiting the utility model.

[0040] 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 it is described to the first, the second is only used for distinguishing the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0041] 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.

[0042] Referring to Figures 1 to 13 The utility model discloses a compressor, be applied to electrical equipment, the electrical equipment here can be refrigerator, ice cabinet, clothes dryer etc.

[0043] It can be understood that the compressor comprises a crankcase 100, an outer exhaust pipe 260 and at least one silencer 270.

[0044] Referring to Figure 1 It can be understood that, generally speaking, the compressor further comprises a housing 200, a motor assembly, a crankshaft 210, a piston, a valve plate assembly 220 and a cylinder head 230. The crankcase 100, the motor assembly, the crankshaft 210, the piston, the valve plate assembly 220 and the silencer 270 are all installed in the housing 200, and the outer exhaust pipe 260 is arranged through the side wall of the housing 200 and fixedly connected with the housing 200.

[0045] It can be understood that the silencer 270 is located outside the crankcase 100, and the silencer 270 comprises an outer shell, the outer shell is arranged in a spaced manner with the crankcase 100, the outer shell defines a silencing cavity, and the outer shell is provided with an air inlet and an air outlet communicating with the silencing cavity, so that the silencer 270 is connected with the connecting pipe 250.

[0046] Referring to Figure 1 It can be understood that the crankcase 100 comprises a body part 110 and a compression cylinder body 120, the body part 110 is provided with a shaft hole 111, the central axis of the shaft hole 111 is arranged in the up-down direction, the compression cylinder body 120 is located on the radial side of the body part 110 along the shaft hole 111, the compression cylinder body 120 is provided with a compression cavity 122, and the central axis of the compression cavity 122 is arranged in the horizontal direction. The valve plate assembly 220 is installed on the side of the compression cylinder body 120 away from the shaft hole 111, and the cylinder head 230 is installed on the side of the valve plate assembly 220 away from the compression cylinder body 120. The piston is slidingly installed in the compression cavity 122, the crankshaft 210 is rotatably installed in the shaft hole 111, one end of the crankshaft 210 is connected with the motor assembly, the other end is provided with an eccentric part, and the eccentric part is hinged with the piston through the connecting rod 240. Therefore, the motor assembly drives the crankshaft 210 to rotate, and the crankshaft 210 can drive the piston to reciprocate in the compression cavity 122 through the connecting rod 240, so as to realize the compression work of the refrigerant.

[0047] Referring to Figure 2As shown, it can be understood that the upper end of the crankcase 100 is further provided with at least two buffer cavities 131. Specifically, the crankcase 100 comprises at least two exhaust cylinder blocks 130, which are connected to the upper end of the body part 110 and located at the outer periphery of the shaft hole 111. Each exhaust cylinder block 130 is provided with an inner cavity with an opening facing upward, which is in a cylindrical structure, i.e. the buffer cavity 131. The top of the exhaust cylinder block 130 is provided with a cavity cover 132, which is used to close the buffer cavity 131.

[0048] It can be easily understood that when the two buffer cavities 131 are communicated, the communication is realized through the connecting pipe 250 connected between the corresponding cavity covers 132. Similarly, when the buffer cavities 131 and the outer exhaust pipe 260 are communicated, the communication is realized through the connecting pipe 250 connected between the corresponding cavity covers 132 and the outer exhaust pipe 260.

[0049] It can be easily understood that the at least two buffer cavities 131 are divided into two groups, one part of the buffer cavities 131 constitutes the first gas path 300, and the other part of the buffer cavities 131 constitutes the second gas path 400.

[0050] Referring to Figure 2 As shown, it can be understood that the cylinder head 230 is provided with an exhaust cavity, which is communicated with the compression cavity 122 through the valve plate assembly 220. At the same time, the crankcase 100 is provided with a flow hole 121 communicated with the exhaust cavity, which is located at the radial side of the compression cavity 122.

[0051] Referring to Figure 2 and Figure 5 As shown, it can be understood that in the present example, the number of buffer cavities 131 is two, i.e. the number of exhaust cylinder blocks 130 is two, and the two exhaust cylinder blocks 130 are located at the two sides of the compression cylinder block 120 along the radial direction and at the end of the compression cylinder block 120 close to the shaft hole 111. The two buffer cavities 131 are communicated with each other, i.e. the two buffer cavities 131 are connected in series. The crankcase 100 is provided with one flow hole 121, which is communicated with one of the buffer cavities 131 (i.e. the first gas path 300), and the other buffer cavity 131 (i.e. the second gas path 400) is communicated with the outer exhaust pipe 260, that is, the exhaust cavity, the flow hole 121, the first gas path 300, the second gas path 400 and the outer exhaust pipe 260 are communicated in sequence. The two buffer cavities 131 communicated with each other are further connected with the silencer 270, i.e. one buffer cavity 131, the silencer 270, the other buffer cavity 131, the outer exhaust pipe 260 are communicated in sequence; or the buffer cavities 131 communicated with each other and the outer exhaust pipe 260 are connected with the silencer 270, i.e. the two buffer cavities 131, the silencer 270, the outer exhaust pipe 260 are communicated in sequence; or the two buffer cavities 131 communicated with each other and the buffer cavities 131 communicated with each other and the outer exhaust pipe 260 are all connected with the silencer 270.

[0052] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber, and flows to a buffer chamber 131 through the flow hole 121, and further flows to another buffer chamber 131 and the muffler 270, and is finally discharged from the outer exhaust pipe 260 to the outside of the compressor. During the exhaust process, the refrigerant expands in the buffer chamber 131 or the muffler 270 to reduce the pulsation of the refrigerant during the exhaust process.

[0053] Therefore, the exhaust pulsation of the refrigerant is significantly reduced by the two buffer chambers 131 and the muffler 270, the stability of the exhaust flow is improved, the vibration and noise caused by the pulsation of the flow are effectively reduced, the energy loss caused by the mechanical vibration and noise is effectively reduced, more energy is used for actual compression work, and the energy efficiency of the compressor is improved. At the same time, due to the reduction of the pulsation of the refrigerant during the exhaust process, the pressure fluctuation of the whole compressor is balanced, the mechanical failure caused by uneven pressure is avoided, the stable pressure environment is beneficial to the efficient operation of the compressor, the service life of the compressor is prolonged, the maintenance frequency is reduced, and the frequency of replacing parts is reduced, thereby reducing the operating cost.

[0054] Referring to Figure 6 It can be understood that, in some other embodiments, the crankcase 100 is provided with two flow holes 121, the two flow holes 121 are respectively communicated with two buffer chambers 131, and the two buffer chambers 131 are respectively communicated with the outer exhaust pipe 260, that is, the two buffer chambers 131 are connected in parallel. The two buffer chambers 131 are respectively the first gas path 300 and the second gas path 400, that is, the first gas path 300 and the second gas path 400 are connected in parallel and are respectively communicated with the outer exhaust pipe 260. The muffler 270 can be connected between the two buffer chambers 131 and the outer exhaust pipe 260, or the muffler 270 is connected between one of the buffer chambers 131 and the outer exhaust pipe 260.

[0055] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber, and flows to a buffer chamber 131 through the flow hole 121, and further flows to another buffer chamber 131 and the muffler 270, and is finally discharged from the outer exhaust pipe 260 to the outside of the compressor. During the exhaust process, the refrigerant expands in the buffer chamber 131 or the muffler 270 to reduce the pulsation of the refrigerant during the exhaust process.

[0056] Meanwhile, since the compressed refrigerant flows to the outer exhaust pipe 260 through the two flow holes 121 respectively, through the first gas path 300 and the second gas path 400 respectively, the flow size of the refrigerant flowing from the exhaust chamber to the outer exhaust pipe 260 can be effectively increased, where the flow size is the cross-sectional area of the passage between the exhaust chamber and the outer exhaust pipe 260, thereby effectively reducing the airflow resistance during the exhaust process, which is conducive to further improving the energy efficiency of the compressor.

[0057] Referring to Figure 3 and Figure 7 It can be understood that the number of buffer chambers 131 is three, and the crankcase 100 is provided with one flow hole 121 in some other embodiments. The first gas path 300 includes two buffer chambers 131 that are sequentially communicated, and the second gas path 400 includes another buffer chamber 131; or the first gas path 300 includes one buffer chamber 131, and the second gas path 400 includes another two buffer chambers 131 that are sequentially communicated. The first gas path 300, the second gas path 400 and the outer exhaust pipe 260 are sequentially communicated, i.e., the three buffer chambers 131 are sequentially communicated, and the first gas path 300 and the second gas path 400 are connected in series. The buffer chamber 131 at one end is communicated with the flow hole 121, and the buffer chamber 131 at the other end is connected with the outer exhaust pipe 260. It can be easily understood that at least one of the two buffer chambers 131 that are communicated with each other and the buffer chamber 131 that is communicated with the outer exhaust pipe 260 is connected with the muffler 270.

[0058] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber, and then flows to the outer exhaust pipe 260 through the flow hole 121 and the three buffer chambers 131, and is discharged to the outside of the compressor through the outer exhaust pipe 260. It can be easily understood that the refrigerant also flows through the muffler 270 during the exhaust process. In this way, the exhaust pulsation of the refrigerant is further reduced, the stability of the exhaust airflow is improved, and the energy efficiency of the compressor is improved, which will not be described here.

[0059] Referring to Figure 8 It can be understood that the number of buffer chambers 131 is three, and the crankcase 100 is provided with two flow holes 121 in some other embodiments. The first gas path 300 includes two buffer chambers 131 that are sequentially communicated, and the second gas path 400 includes another buffer chamber 131; or the first gas path 300 includes one buffer chamber 131, and the second gas path 400 includes another two buffer chambers 131 that are sequentially communicated. One end of the first gas path 300 is communicated with one of the flow holes 121, and the other end is communicated with the outer exhaust pipe 260. Similarly, one end of the second gas path 400 is communicated with the other flow hole 121, and the other end is communicated with the outer exhaust pipe 260. That is, the first gas path 300 and the second gas path 400 are connected in parallel and communicated with the outer exhaust pipe 260 respectively.

[0060] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber, and flows through the two flow holes 121 to the buffer chambers 131 of the first gas path 300 and the second gas path 400 respectively, and then flows to the outer exhaust pipe 260, and is discharged to the outside of the compressor through the outer exhaust pipe 260. It is easy to understand that the refrigerant also flows through the muffler 270 during the exhaust process. In this way, the exhaust pulsation of the refrigerant is further reduced, the stability of the exhaust flow is improved, the energy efficiency of the compressor is improved, the flow size of the refrigerant flowing from the exhaust chamber to the outer exhaust pipe 260 is effectively increased, the air flow resistance during the exhaust process is reduced, and the energy efficiency of the compressor is further improved. Here, no further description is given.

[0061] Referring to Figure 9 In other embodiments, as shown in FIG. 4, it is understood that the number of buffer chambers 131 is four, and the crankcase 100 is provided with one flow hole 121. The first gas path 300 includes two buffer chambers 131 that are sequentially communicated, and the second gas path 400 includes another two buffer chambers 131 that are sequentially communicated. The first gas path 300, the second gas path 400, and the outer exhaust pipe 260 are sequentially communicated, that is, the four buffer chambers 131 are sequentially communicated, and the first gas path 300 and the second gas path 400 are connected in series. The buffer chamber 131 at one end is communicated with the flow hole 121, and the buffer chamber 131 at the other end is connected with the outer exhaust pipe 260. It is easy to understand that at least one of the two buffer chambers 131 that are communicated with each other and the buffer chamber 131 that is communicated with the outer exhaust pipe 260 is connected with the muffler 270.

[0062] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber, and flows through the two flow holes 121 to the buffer chambers 131 of the first gas path 300 and the second gas path 400 respectively, and then flows to the outer exhaust pipe 260, and is discharged to the outside of the compressor through the outer exhaust pipe 260. It is easy to understand that the refrigerant also flows through the muffler 270 during the exhaust process. In this way, the exhaust pulsation of the refrigerant is further reduced, the stability of the exhaust flow is improved, the energy efficiency of the compressor is improved, the flow size of the refrigerant flowing from the exhaust chamber to the outer exhaust pipe 260 is effectively increased, the air flow resistance during the exhaust process is reduced, and the energy efficiency of the compressor is further improved. Here, no further description is given.

[0063] Referring to Figure 10 In other embodiments, as shown in FIG. 4, it is understood that the number of buffer chambers 131 is four, and the crankcase 100 is provided with one flow hole 121. The first gas path 300 includes two buffer chambers 131 that are sequentially communicated, and the second gas path 400 includes another two buffer chambers 131 that are sequentially communicated. The first gas path 300, the second gas path 400, and the outer exhaust pipe 260 are sequentially communicated, that is, the four buffer chambers 131 are sequentially communicated, and the first gas path 300 and the second gas path 400 are connected in series. The buffer chamber 131 at one end is communicated with the flow hole 121, and the buffer chamber 131 at the other end is connected with the outer exhaust pipe 260. It is easy to understand that at least one of the two buffer chambers 131 that are communicated with each other and the buffer chamber 131 that is communicated with the outer exhaust pipe 260 is connected with the muffler 270.

[0064] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber. The refrigerant then flows through two flow holes 121 to the buffer chambers 131 of the first air path 300 and the second air path 400, respectively, and then flows to the external exhaust pipe 260, where it is discharged to the outside of the compressor. It is easy to understand that the refrigerant also flows through the muffler 270 during the exhaust process. This further reduces refrigerant exhaust pulsation, improves the stability of the exhaust airflow, and enhances the compressor's energy efficiency. Simultaneously, it effectively increases the flow size of the refrigerant from the exhaust chamber to the external exhaust pipe 260, reducing airflow resistance during the exhaust process, which is beneficial for further improving the compressor's energy efficiency. Further details are omitted here.

[0065] Reference Figure 4 and Figure 11 As shown, in some embodiments, it is understood that there are five buffer chambers 131, and the crankcase 100 is provided with one flow hole 121. The first air passage 300 includes two buffer chambers 131 connected in sequence, and the second air passage 400 includes another three buffer chambers 131 connected in sequence; or the first air passage 300 includes three buffer chambers 131 connected in sequence, and the second air passage 400 includes another two buffer chambers 131 connected in sequence. The first air passage 300, the second air passage 400, and the external exhaust pipe 260 are connected in sequence, that is, the five buffer chambers 131 are connected in sequence, and the first air passage 300 and the second air passage 400 are connected in series. The buffer chamber 131 located at one end is connected to the flow hole 121, and the buffer chamber 131 at the other end is connected to the external exhaust pipe 260. It is easy to understand that at least one of the two interconnected buffer chambers 131 and the interconnected buffer chamber 131 and the external exhaust pipe 260 is connected to a muffler 270.

[0066] The compressed refrigerant is discharged from the compression chamber 122 to the exhaust chamber. The refrigerant then flows sequentially through the flow orifice 121 and five buffer chambers 131 to the external exhaust pipe 260, where it is discharged to the outside of the compressor. It is easy to understand that the refrigerant also flows through the muffler 270 during the exhaust process. This further reduces refrigerant exhaust pulsation, improves the stability of the exhaust airflow, and enhances the compressor's energy efficiency; details will not be elaborated further here.

[0067] Reference Figure 12As shown, in other embodiments, it can be understood that the number of buffer cavities 131 is five, and the crankcase 100 is provided with two flow holes 121. The first gas path 300 includes two buffer cavities 131 in sequence, and the second gas path 400 includes another three buffer cavities 131 in sequence; or the first gas path 300 includes three buffer cavities 131 in sequence, and the second gas path 400 includes another two buffer cavities 131 in sequence. One end of the first gas path 300 is in communication with one of the flow holes 121, and the other end is in communication with the external exhaust pipe 260. Similarly, one end of the second gas path 400 is in communication with the other flow hole 121, and the other end is in communication with the external exhaust pipe 260. That is, the first gas path 300 and the second gas path 400 are connected in parallel and are respectively in communication with the external exhaust pipe 260.

[0068] The compressed refrigerant is discharged from the compression cavity 122 to the exhaust cavity, and the refrigerant flows to the buffer cavities 131 of the first gas path 300 and the second gas path 400 through the two flow holes 121, respectively, and then flows to the external exhaust pipe 260, and is discharged to the outside of the compressor through the external exhaust pipe 260. It can be easily understood that the refrigerant also flows through the muffler 270 during the exhaust process. In this way, the exhaust pulsation of the refrigerant is further reduced, the stability of the exhaust flow is improved, the energy efficiency of the compressor is improved, and at the same time, the flow size of the refrigerant flowing from the exhaust cavity to the external exhaust pipe 260 is effectively increased, the air flow resistance during the exhaust process is reduced, which is beneficial to further improve the energy efficiency of the compressor. Here, no longer described.

[0069] It can be understood that the number of buffer cavities 131 can also be six, seven or more, and the plurality of buffer cavities 131 are divided into two groups and form the first gas path 300 and the second gas path 400. The first gas path 300 and the second gas path 400 can be connected in series or in parallel, and here, no longer described.

[0070] Referring to Figure 4 As shown, it can be understood that in this embodiment, in order to ensure the structural stability of the crankcase 100, the central axis of the shaft hole 111 is coplanar with the central axis of the compression cylinder body 120, so that the two sides of the crankcase 100 are balanced, and the structural stability is ensured. It can be easily understood that the central axis of the shaft hole 111 and the central axis of the compression cylinder body 120 can determine a unique reference plane.

[0071] Referring to Figure 4As shown, it can be understood that, in the embodiment in which the number of the buffer cavities 131 is even, for example, the number of the buffer cavities 131 is two or four, etc., the number of the exhaust cylinder blocks 130 is also even correspondingly. The plurality of exhaust cylinder blocks 130 are respectively connected to the top of the body part 110 and are located at the radial outer periphery of the shaft hole 111. The plurality of exhaust cylinder blocks 130 are evenly divided into two groups and are respectively arranged on the two sides of the reference plane. When the number of the exhaust cylinder blocks 130 on the same side is greater than or equal to two, the exhaust cylinder blocks 130 on the same side are arranged in a straight line in sequence. That is, the plurality of buffer cavities 131 are evenly divided into two groups and are respectively arranged on the two sides of the reference plane. In this way, the layout of the plurality of exhaust cylinder blocks 130 can be optimized, so that the structure of the crankcase 100 is more compact and reasonable, and the balance weight is improved, which is beneficial to improve the structural stability of the crankcase 100.

[0072] It can be understood that the two groups of exhaust cylinder blocks 130 are symmetrically arranged about the reference plane. In this way, the balance weight of the crankcase 100 on the two sides of the reference plane can be balanced, and the structural strength of the two sides of the crankcase 100 is improved, thereby optimizing the dynamic balance of the crankcase 100, which is beneficial to reduce mechanical vibration and noise, and improve the stability of the compressor.

[0073] Referring to Figure 3 and Figure 4 As shown, it can be understood that, in the embodiment in which the number of the buffer cavities 131 is odd, for example, the number of the buffer cavities 131 is three or five, etc., the number of the exhaust cylinder blocks 130 is also odd correspondingly. The plurality of exhaust cylinder blocks 130 are respectively connected to the top of the body part 110 and are located at the radial outer periphery of the shaft hole 111. One of the exhaust cylinder blocks 130 is located on the side of the shaft hole 111 away from the compression cylinder block 120 along the radial direction of the shaft hole 111, and the exhaust cylinder block 130 is symmetrically arranged about the reference plane, which is beneficial to balance the balance weight of the crankcase 100.

[0074] The remaining plurality of buffer cavities 131 are evenly divided into two groups and are respectively arranged on the two sides of the reference plane, and when the number of the exhaust cylinder blocks 130 on the same side is greater than or equal to two, the exhaust cylinder blocks 130 on the same side are arranged in a straight line in sequence. That is, the remaining plurality of buffer cavities 131 are evenly divided into two groups and are respectively arranged on the two sides of the reference plane. In this way, the layout of the plurality of exhaust cylinder blocks 130 can be optimized, so that the structure of the crankcase 100 is more compact and reasonable, and the balance weight is improved, which is beneficial to improve the structural stability of the crankcase 100. It can be easily understood that the two groups of exhaust cylinder blocks 130 are symmetrically arranged about the reference plane. In this way, the balance weight of the crankcase 100 on the two sides of the reference plane can be balanced, and the structural strength of the two sides of the crankcase 100 is improved, thereby optimizing the dynamic balance of the crankcase 100, which is beneficial to reduce mechanical vibration and noise, and improve the stability of the compressor.

[0075] It can be understood that in any of the above embodiments, the number of buffer cavities 131 of the first gas path 300 is equal to or differs by 1 from the number of buffer cavities 131 of the second gas path 400. Therefore, when the first gas path 300 and the second gas path 400 are connected in parallel, the flow resistance of the first gas path 300 and the second gas path 400 is not much different in the process of the refrigerant flowing from the exhaust cavity to the outer exhaust pipe 260 through the first gas path 300 and the second gas path 400, respectively, which is beneficial to the refrigerant flowing out through the first gas path 300 and the second gas path 400, respectively, thereby ensuring a large flow size during the exhaust process, reducing the air flow resistance during the exhaust process, and further improving the energy efficiency of the compressor.

[0076] It can be understood that in any of the above embodiments, the minimum inner diameter of the flow hole 121 is greater than the minimum inner diameter of the connecting pipe 250. That is, the minimum flow size of the flow hole 121 is greater than the minimum flow size of the connecting pipe 250. Since the flow hole 121 is the only passage for the refrigerant to flow from the exhaust pipe to the first gas path 300 and the second gas path 400, increasing the minimum inner diameter of the flow hole 121 can further reduce the air flow resistance during the exhaust process, thereby improving the energy efficiency of the compressor.

[0077] Referring to Table 1, it can be understood that COP is the energy conversion efficiency of the compressor during refrigeration or heating. Table 1 shows the comparison of COP of the compressor of the present technical solution and the compressor of the prior art. In the experimental verification environment, the COP of the compressor of the present technical solution reaches 2.95, while the COP of the compressor of the prior art is only 2.75. The present technical solution increases the COP of the compressor by more than 7% by increasing the minimum inner diameter of the flow hole 121. In the simulation verification environment, the COP of the compressor of the present technical solution reaches 3.186, while the COP of the compressor of the prior art is only 3.019. The present technical solution increases the COP of the compressor by more than 5% by increasing the minimum inner diameter of the flow hole 121. Therefore, it can be seen that the present technical solution can increase the COP of the compressor by increasing the minimum inner diameter of the flow hole 121, thereby improving the energy efficiency of the compressor.

[0078] Table 1 COP comparison of compressors

[0079]

[0080] It can be understood that under high exhaust pressure and large flow conditions, the lift of the exhaust valve plate is large, the exhaust resistance is large, and the exhaust resistance loss on the exhaust side is large, which seriously affects the energy efficiency of the compressor. Here, the high exhaust pressure and large flow condition refers to an exhaust pressure of 2Mpa and a suction pressure of 1Mpa. For example, the dryer is in a heating condition, and the compressor is in a high exhaust pressure and large flow condition.

[0081] Referring toFigure 13 As shown in the figure, it can be understood that, Figure 13 The P-V diagram of the working process of the compressor under the high exhaust pressure and large flow condition, and it can be known from the figure that the exhaust resistance loss is large at this time.

[0082] Therefore, by adopting the parallel connection of the first gas path 300 and the second gas path 400, and making the minimum inner diameter of the flow hole 121 greater than the minimum inner diameter of the connecting pipe 250, the flow size in the exhaust process is effectively increased, the air flow resistance in the exhaust process is reduced, and the energy efficiency of the compressor is improved.

[0083] The electric appliance of the second aspect embodiment of the utility model, including the compressor of the first aspect embodiment of the utility model, the electric appliance here can be refrigerator, freezer, clothes dryer and the like.

[0084] The electric appliance adopts all the technical solutions of the compressor of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments.

[0085] The utility model embodiments are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and within the knowledge range possessed by the ordinary skilled in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. Compressor, characterized in that, The compressor comprises: a housing; an outer exhaust pipe mounted on the housing; a crankcase arranged in the housing, the crankcase comprising a body portion and a compression cylinder block, the body portion being provided with a shaft hole, the compression cylinder block being arranged on a side of the body portion along a radial direction of the shaft hole, and the crankcase being provided with at least two buffer cavities at an upper end of the crankcase, the at least two buffer cavities being arranged on one side of the compression cylinder block and spaced along a periphery of the shaft hole; a first gas path comprising one of the buffer cavities or a part of the buffer cavities connected in sequence; a second gas path comprising another one of the buffer cavities or another part of the buffer cavities connected in sequence; the first gas path, the second gas path and the outer exhaust pipe being connected in sequence; alternatively, the first gas path and the second gas path being connected in parallel and respectively connected with the outer exhaust pipe; at least one muffler arranged in the housing and located outside the crankcase; wherein a connecting pipe is connected between adjacent buffer cavities connected in sequence and between the buffer cavities and the outer exhaust pipe connected in sequence, and the connecting pipe at at least one position is connected with the muffler.

2. The compressor of claim 1, wherein: The compressor further comprises a cylinder head mounted on an end portion of the compression cylinder block, the cylinder head being provided with an exhaust cavity, and the crankcase being provided with one overflow hole, and if the first gas path, the second gas path and the outer exhaust pipe are connected in sequence, the exhaust cavity, the overflow hole and the first gas path are connected in sequence.

3. The compressor of claim 1, wherein: The compressor further comprises a cylinder head mounted on an end portion of the compression cylinder block, the cylinder head being provided with an exhaust cavity, and the crankcase being provided with two overflow holes, and if the first gas path and the second gas path are connected in parallel, the exhaust cavity is connected with the first gas path through one of the overflow holes, and the exhaust cavity is connected with the second gas path through the other overflow hole.

4. The compressor of claim 2 or 3, characterized in that: A minimum inner diameter of the overflow hole is greater than a minimum inner diameter of the connecting pipe.

5. The compressor of claim 1, wherein: A number of the buffer cavities of the second gas path is equal to or differs by 1 from a number of the buffer cavities of the first gas path.

6. The compressor of claim 1, wherein: The number of the buffer cavities is even, and a plurality of the buffer cavities are divided into two groups and arranged on two sides of the body portion along a radial direction of the compression cylinder block.

7. The compressor of claim 1, wherein: The number of the buffer cavities is odd, one of the buffer cavities is arranged on the body portion and located on a side of the shaft hole away from the compression cylinder block along the radial direction, and the remaining plurality of the buffer cavities are divided into two groups and arranged on two sides of the body portion along the radial direction of the compression cylinder block.

8. The compressor of claim 6 or 7, characterized in that: A central axis of the shaft hole and a central axis of the compression cylinder block are coplanar and determine a reference plane, and two groups of the buffer cavities located on two sides of the body portion along the radial direction of the compression cylinder block are symmetrically arranged about the reference plane.

9. The compressor of claim 1, wherein: The muffler comprises an outer shell spaced apart from the crankcase, the outer shell defining a muffling cavity, and the outer shell being provided with an air inlet and an air outlet communicating with the muffling cavity. And / or, the buffer cavities are configured as a cylindrical structure with an opening upward.

10. An electrical appliance apparatus, characterized by, The compressor comprises any one of claims 1 to 9.

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