Compressor and refrigeration apparatus

Abstract

The application discloses a compressor and a refrigeration device, the compressor comprising a shell, a cylinder, a piston assembly, a first external suction pipe, a second external suction pipe and a connecting pipe, the bottom of a working cavity of the cylinder is provided with a first suction hole, and the side wall is provided with a second suction hole; the second external suction pipe is installed on the shell wall of the shell to input the refrigerant of an external second condensing flow path into the shell and flow into the second suction hole through the shell. In the technical scheme, the connecting pipe is arranged to connect and convey the external first condensing flow path with lower pressure into the cylinder, when the refrigerant gas in the working cavity of the cylinder is compressed, higher pressure is formed in the cylinder, and the refrigerant of the second condensing flow path with higher pressure is connected and conveyed between the cylinder and the shell, so that the pressure difference between the inside and the outside of the cylinder is small, and the compressed refrigerant gas in the cylinder is prevented from leaking to the outside of the cylinder due to the excessively large pressure difference, so as to solve the problem that the cylinder of the existing compressor is easy to leak.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a compressor and a refrigeration equipment. BACKGROUND

[0002] As the most core component and energy-consuming part of the refrigeration system, the compressor is required to have higher refrigeration performance and energy efficiency. A household refrigerator generally has a freezing chamber and a refrigerating chamber. In the process of realizing the temperature reduction of the freezing chamber and the refrigerating chamber, the evaporation temperatures of the corresponding refrigerants are different, and the pressures of the corresponding refrigerants are also different.

[0003] The existing compressor realizes the refrigeration functions of freezing and refrigerating through a pipeline in a series form, which makes the COP of the refrigerator low. In order to obtain a better energy efficiency ratio, a new pump body structure with a single cylinder and double independent suction ports is different from the traditional single suction single exhaust pump body mechanism and has the ability to greatly improve the overall performance of the reciprocating compressor. When the compressor is working, in order to improve the energy efficiency COP, a second suction port is additionally provided. However, when the compressor cylinder compresses the gas in the working process, due to the excessive pressure, there will be gaps in the manufacturing and assembly process of the cylinder body, and it is inevitable that the gas will leak into the shell of the compressor. SUMMARY

[0004] The main purpose of the present application is to provide a compressor and a refrigeration equipment, which aims to solve the problem that the cylinder body of the existing compressor is easy to leak.

[0005] To achieve the above purpose, the present application provides a compressor, wherein the compressor comprises:

[0006] a shell;

[0007] a cylinder body, the bottom of the working cavity of the cylinder body is provided with a first suction port, and the side wall is provided with a second suction port;

[0008] a piston assembly comprising a piston movably arranged in the working cavity;

[0009] a first external suction pipe for connecting an external first condensing flow path;

[0010] a connecting pipe, two ends of the connecting pipe are connected with the first suction port and the first external suction pipe, respectively; and

[0011] a second external suction pipe for connecting an external second condensing flow path, the second external suction pipe is installed on the shell wall of the shell, so as to input the refrigerant of the external second condensing flow path into the shell and flow into the second suction port through the shell.

[0012] Optionally, the pressure value of the refrigerant in the first external suction pipe is P1, the pressure value of the refrigerant in the shell is P2, and P1

[0013] Optionally, P2 / P1≤6.

[0014] Optionally, the compressor further comprises a suction silencing device, the suction silencing device is formed with a silencing cavity, and an inlet and an outlet communicating with the silencing cavity, the inlet communicates with one end of the connecting pipe, and the outlet communicates with the first suction hole, so that the refrigerant flowing out of the connecting pipe flows into the cylinder body through the silencing cavity.

[0015] Optionally, the material of the connecting pipe is metal or high polymer material.

[0016] Optionally, the connecting pipe is sleeved and matched between one end and the inlet.

[0017] Optionally, the connecting pipe is interference fitted with the inlet; and / or,

[0018] The other end of the connecting pipe is fixed with the first external suction pipe by welding.

[0019] Optionally, the connecting pipe comprises at least one bending section.

[0020] Optionally, the piston has a first dead point located at the bottom of the cylinder body and a second dead point away from the bottom of the cylinder body in the active stroke.

[0021] The distance between the second suction hole and the first dead point is L, and the distance between the first dead point and the second dead point is S, wherein 0.5S

[0022] The application also provides a refrigeration equipment, which comprises the above compressor, and the compressor comprises:

[0023] A shell;

[0024] A cylinder body, the bottom of the working cavity of the cylinder body is provided with a first suction hole, and the side wall is provided with a second suction hole;

[0025] A piston assembly comprising a piston movably arranged in the working cavity;

[0026] A first external suction pipe for connecting an external first condensing flow path;

[0027] A connecting pipe, two ends of the connecting pipe are connected with the first suction hole and the first external suction pipe respectively; and,

[0028] A second external suction pipe is used to communicate with the second external condensing flow path, and is installed on the shell wall of the shell to input the refrigerant of the second external condensing flow path into the shell and flow into the second suction hole through the shell.

[0029] Optionally, the refrigeration device is a refrigerator.

[0030] In the technical solution provided by the present application, the compressor includes a first external suction pipe and a second external suction pipe, the first external suction pipe is used to communicate with a first external condensing flow path, the second external suction pipe is used to communicate with a second external condensing flow path, the gas pressure of the refrigerant of the first external condensing flow path is lower than that of the second external condensing flow path, the bottom of the working cavity of the cylinder body is provided with a first suction hole, and the sidewall is provided with a second suction hole, the first suction hole is directly communicated with the first external suction pipe through a connecting pipe, the second external suction pipe is installed on the shell wall of the shell to input the refrigerant of the second external condensing flow path into the shell and flow into the second suction hole through the shell, when the piston moves in the working cavity, the refrigerant gas in the working cavity of the compressor is compressed to form high-pressure gas, and the high-pressure refrigerant of the second external condensing flow path is transported to the shell and located outside the cylinder body, so that the pressure difference between the gas pressure outside the cylinder body and the gas pressure inside the cylinder body is small during the working process of the cylinder body, so that the high-pressure refrigerant gas in the working cavity of the cylinder body is not easy to leak into the shell through the gap on the cylinder body, the first external condensing flow path with lower gas pressure is communicated and transported into the cylinder body through the connecting pipe, when the cylinder body compresses the refrigerant gas in the working cavity, the pressure in the cylinder body is also high, and the refrigerant with high pressure in the second external condensing flow path is communicated and transported between the cylinder body and the shell, so that the pressure difference between the inside and outside of the cylinder body is small, and the compressed refrigerant gas in the cylinder body is prevented from leaking to the outside of the cylinder body due to the excessive pressure difference, so as to solve the problem that the cylinder body of the existing compressor is easy to leak. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative labor.

[0032] Figure 1 The internal structure diagram of an embodiment of the compressor provided by the present application;

[0033] Figure 2 The cross-sectional schematic diagram of an embodiment of the compressor provided by the present application;

[0034] Figure 3 Fig. 2 is a structural schematic view of a connecting pipe, an air intake silencer and a first external air intake pipe in Fig. 1. Figure 1

[0035] Figure 4 Fig. 3 is an assembly schematic view of a connecting pipe, an air intake silencer and a first external air intake pipe in Fig. 1. The reference numeral is explained as follows: Figure 1

[0036] Reference Name Reference Name 100 Compressor 31 Piston 1 Housing 4 First external suction pipe 2 Cylinder 5 Connecting pipe 2a Working chamber 51 Bent section 21 First suction hole 6 Second external suction pipe 22 Second suction hole 7 Suction silencer 3 Piston assembly The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

[0037] DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0039] It should be noted that if the embodiments of the present application involve directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings). If the certain posture changes, the directionality indication also changes accordingly.

[0040] In addition, if the embodiments of the present application involve the description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0041] ​​The compressor is the most core component and energy-consuming part of the refrigeration system, and higher requirements are put forward to its refrigeration performance and energy efficiency level. The household refrigerator generally has a freezing chamber and a refrigerating chamber. In the process of realizing the temperature reduction of the freezing chamber and the refrigerating chamber, the evaporation temperatures of the corresponding refrigerants are different, and the pressures of the corresponding refrigerants are also different. The existing compressor realizes the refrigeration function of freezing and refrigerating in series through a pipeline, which makes the COP (energy efficiency ratio) of the refrigerator lower. In order to obtain a better energy efficiency ratio, the new pump body structure with a single cylinder and double independent suction is different from the traditional single suction and single exhaust pump body mechanism, and has the ability to greatly improve the overall performance of the reciprocating compressor. When the compressor is working, in order to improve its energy efficiency COP, a second suction hole is additionally provided. However, when the compressor cylinder compresses gas in the working process, due to the excessive pressure, there will be gaps in the manufacturing and assembly process of the cylinder body, and it is inevitable that gas will leak into the shell of the compressor.

[0042] In order to solve the above problems, the present application provides a kind of compressor 100, Figures 1 to 4 The specific embodiments of the compressor 100 provided by the present application are as follows.

[0043] Please refer to Figures 1 to 2 The compressor 100 includes a shell 1, a cylinder body 2, a piston assembly 3, a first external suction pipe 4, a second external suction pipe 6 and a connecting pipe 5. The bottom of the working cavity 2a of the cylinder body 2 is provided with a first suction hole 21, and the side wall is provided with a second suction hole 22. The piston assembly 3 includes a piston 31 movably arranged in the working cavity 2a. The first external suction pipe 4 is used to communicate with the first condensation flow path. The two ends of the connecting pipe 5 are connected to the first suction hole 21 and the first external suction pipe 4, respectively. The second external suction pipe 6 is used to communicate with the second condensation flow path. The second external suction pipe 6 is installed on the shell wall of the shell 1 to input the refrigerant of the second condensation flow path into the shell 1 and flow into the second suction hole 22 through the shell 1.

[0044] The technical scheme provided by the application, the compressor 100 includes a first external suction pipe 4 and a second external suction pipe 6, the first external suction pipe 4 is used for being communicated with an external first condensing flow path, the second external suction pipe 6 is used for being communicated with an external second condensing flow path, and the gas pressure of the refrigerant of the external first condensing flow path is less than the gas pressure of the external second condensing flow path, the bottom of the working cavity 2a of the cylinder body 2 is provided with a first suction hole 21, and the side wall is provided with a second suction hole 22, the first suction hole 21 is directly communicated with the first external suction pipe 4 through a connecting pipe 5, the second external suction pipe 6 is installed on the shell wall of the shell 1, so that the refrigerant of the external second condensing flow path is input into the shell 1 and flows into the second suction hole 22 through the shell 1, when the piston 31 moves in the working cavity 2a, the refrigerant gas in the working cavity 2a of the compressor 100 is compressed to form high-pressure gas, and the high-pressure refrigerant of the external second condensing flow path is transported to the shell 1 and located outside the cylinder body 2, so that the pressure difference between the gas pressure outside the cylinder body 2 and the gas pressure inside the cylinder body 2 is small during the working process of the cylinder body 2, so that the high-pressure refrigerant gas in the working cavity 2a of the cylinder body 2 is not easy to leak into the shell 1 through the gap on the cylinder body 2, the connecting pipe 5 is arranged to communicate and transport the external first condensing flow path with lower gas pressure into the cylinder body 2, when the cylinder body compresses the refrigerant gas in the working cavity, the cylinder body 2 also forms a higher pressure, and the higher-pressure refrigerant of the second external condensing flow path is communicated and transported between the cylinder body 2 and the shell 1, so that the pressure difference between the inside and outside of the cylinder body 2 is small, and the compressed refrigerant gas in the cylinder body 2 is prevented from leaking to the outside of the cylinder body 2 due to the excessive pressure difference, so as to solve the problem that the cylinder of the existing compressor 100 is easy to leak.

[0045] It should be noted that the compressor 100 is used for the refrigeration system of the refrigerator, and the high-temperature and high-pressure refrigerant gas is transported from the compressor 100 to the evaporator corresponding to the freezing chamber and the refrigerating chamber to evaporate and absorb heat, so as to realize the refrigeration of the freezing chamber and the refrigerating chamber. However, the temperatures set in the freezing chamber and the refrigerating chamber are inconsistent, the evaporation temperatures of the two are different, the temperatures and pressures of the refrigerant after heat exchange in the freezing chamber and the refrigerating chamber are different, and in the prior art, the compressor realizes the refrigeration function of freezing and refrigerating through one flow path. Therefore, when the freezing chamber or the refrigerating chamber needs to be refrigerated, the whole heat exchange system needs to work, which consumes a large amount of energy and has a low energy efficiency.

[0046] Specifically, in the present embodiment, the pressure value of the refrigerant in the first external suction pipe 4 is P1, the pressure value of the refrigerant in the shell 1 is P2, and P1 < P2, preferably, P2 / P1 ≤ 6, so that by setting two parallel flow paths, i.e., the freezing condensation flow path and the refrigeration condensation flow path, the high-temperature and high-pressure refrigerant compressed by the compressor 100 can be reasonably distributed to the freezing flow path and the refrigeration flow path. Since the high-temperature and high-pressure refrigerant compressed by the compressor 100 passes through the evaporator corresponding to the freezing chamber and then returns to the compressor 100, the temperature of the refrigerant is relatively low and the pressure P1 is relatively small when the refrigerant returns to the shell 1 of the compressor 100. Since the high-temperature and high-pressure refrigerant compressed by the compressor 100 passes through the evaporator corresponding to the refrigeration chamber and then returns to the shell 1 of the compressor 100, the temperature of the refrigerant is relatively high and the pressure P2 is relatively large. The working chamber 2a of the cylinder body 2 is connected to the first suction hole 21 and the second suction hole 22 at the same time, so that the relatively low-temperature and low-pressure refrigerant returned from the freezing chamber can be transported to the cylinder body 2 of the compressor 100 through the first suction flow path corresponding to the first suction hole 21, and the relatively high-temperature and high-pressure refrigerant returned from the refrigeration chamber can be transported to the compressor 100 through the second suction flow path corresponding to the second suction hole 22. In this way, when the cylinder body 2 compresses the refrigerant gas transported through the first suction hole 21, the second suction hole 22 can supplement the working chamber 2a, thereby increasing the suction amount of the working chamber 2a of the cylinder body 2, and further improving the compression efficiency of the compressor 100. Moreover, the two parallel flow paths can realize respective working conditions and reduce power consumption.

[0047] It can be understood that when the first suction hole 21 sucks through the first external suction pipe 4, noise is often generated due to the flow of gas and the periodic change of the gas flow in the first external suction pipe 4 and the connecting pipe 5. The compressor 100 further comprises a suction silencing device 7, which is formed with a silencing cavity, an air inlet and an air outlet connected to the silencing cavity. The air inlet is connected to one end of the connecting pipe 5, and the air outlet is connected to the first suction hole 21, so that the refrigerant flowing out of the connecting pipe 5 flows into the cylinder body 2 through the silencing cavity. Since the silencing cavity is provided, the noise generated by the refrigerant can be greatly weakened, thereby reducing the noise of the first external suction pipe 4 to a certain extent during the suction process.

[0048] Since the compressor 100 has a certain temperature during use, the adhesive should be able to withstand a temperature of 100℃ or above. In the present embodiment, the connecting pipe 5 is made of metal or high molecular material, which has the performance of not failing at high temperature, thereby effectively ensuring the operation of the compressor 100 at a temperature of 100℃ or above.

[0049] In order to facilitate installation, in the embodiment, the connecting pipe 5 is sleeved and matched with the air inlet. Specifically, one end of the connecting pipe 5 can be inserted into the air inlet, or the air inlet can be outwardly inserted into one end of the connecting pipe 5. Preferably, in order to ensure the sealing between the connecting pipe 5 and the air suction silencer 7, one end of the connecting pipe 5 is interference-fitted with the air inlet. In another embodiment, the other end of the connecting pipe 5 is fixed with the first external air suction pipe 4 by welding. Of course, the connecting mode of the connecting pipe 5 is not limited to welding. When the material of the connecting pipe 5 is metal, both ends of the connecting pipe 5 can also be welded. When the connecting pipe 5 is a high polymer material, both ends of the connecting pipe 5 can also be fixed and connected by hot melting.

[0050] It can be understood that the longer the total length of the connecting pipe 5 and the first external air suction pipe 4 is, the smaller the vibration of the two is. The reason is that the longer the length is, the longer the vibration transmission path is, so that the energy of the vibration can be dispersed. Therefore, please refer to Figure 3 and Figure 4 The connecting pipe 5 comprises at least one bending section 51. By arranging the bending section 51, the length of the connecting pipe 5 and the total length of the connecting pipe 5 and the first external air suction pipe 4 can be effectively lengthened, so that the energy of the vibration can be dispersed and the amplitude of the vibration can be reduced.

[0051] The compressor 100 provided by the application has two parallel flow paths, i.e. a freezing condensing flow path and a refrigerating condensing flow path, so that the high-temperature and high-pressure refrigerant compressed by the compressor 100 can be reasonably distributed to the freezing flow path and the refrigerating flow path. After the high-temperature and high-pressure refrigerant compressed by the compressor 100 passes through the evaporator corresponding to the freezing chamber, the temperature of the refrigerant when it returns to the compressor 100 is relatively low, and the pressure is relatively small. After the high-temperature and high-pressure refrigerant compressed by the compressor 100 passes through the evaporator corresponding to the refrigerating chamber, the temperature of the refrigerant when it returns to the compressor 100 is relatively high, and the pressure is relatively large. The working cavity 2a of the cylinder body 2 is connected to the first suction hole 21 and the second suction hole 22 at the same time, so that the relatively low-temperature and low-pressure refrigerant returned by the freezing chamber can be transported into the cylinder body 2 of the compressor 100 through the first suction flow path corresponding to the first suction hole 21, and the relatively high-temperature and high-pressure refrigerant returned by the refrigerating chamber can be transported into the compressor 100 through the second suction flow path corresponding to the second suction hole 22. In this way, when the cylinder body 2 compresses the refrigerant gas transported by the first suction hole 21, the second suction hole 22 can supplement the working cavity 2a, so as to increase the suction amount of the working cavity 2a of the cylinder body 2, and further improve the compression efficiency of the compressor 100. In addition, the two parallel flow paths can realize their respective working conditions, and reduce power consumption.

[0052] In a conventional compressor, the opening and closing of each suction hole are often controlled by a control valve group. When the compressor has only one suction hole, one control valve group is arranged. When the compressor has multiple suction holes, multiple control valve groups are generally arranged correspondingly. In this way, the control is relatively complicated. Therefore, in an embodiment of the application, please refer to Figure 2 The distance between the second suction hole 22 and the top dead center is L, and the distance between the top dead center and the bottom dead center is S, wherein 0.5S

[0053] The suction stroke of the cylinder includes:

[0054] The first stroke: the piston 31 moves from the top dead center to the bottom dead center, and the distance from the top dead center is less than 0.5S. In the first stroke, the control valve group is opened, so that the first suction hole 21 is connected, and the second suction hole 22 is blocked by the piston 31. At this time, the working chamber 2a of the cylinder 2 realizes suction only through the first suction hole 21. At this time, the total amount of refrigerant in the working chamber 2a comes from the first suction hole 21, that is, the refrigerant of the first condensing circuit. It can be understood that, since the piston 31 moves to the position close to the bottom dead center, the compression space of the working chamber 2a of the cylinder 2 increases, and is in a negative pressure state, so that the external airflow enters the working chamber 2a of the cylinder 2 from the first suction hole 21. Since the airflow pressure through the first suction hole 21 is less than the airflow pressure through the second suction hole 22. Therefore, in this movement stroke, the second suction hole 22 is blocked by the piston 31 to avoid the airflow of the second suction hole 22 hindering the airflow of the first suction hole 21 into the working chamber 2a of the cylinder 2.

[0055] Second stroke: the piston 31 moves from the first dead point to the second dead point, and the distance from the first dead point is greater than 0.5S. In the second stroke, the piston 31 does not block the second suction hole 22, so that the second suction hole 22 communicates with the working chamber 2a of the cylinder 2. At this time, the control valve group switches between the open state and the closed state according to the actual demand. When the control valve group is in the open state, the first suction hole 21 and the second suction hole 22 simultaneously input the airflow to the working chamber 2a of the cylinder 2. Because a certain amount of airflow is sucked into the space of the working chamber 2a of the cylinder 2 through the first suction hole 21 in the first stroke, the compression space has a certain airflow pressure. Therefore, when the airflow is input to the working chamber 2a of the cylinder 2 through the second suction hole 22, the influence of the airflow of the first suction hole 21 is small. And because the distance from the second suction hole 22 to the first dead point is greater than 0.5S, that is, the distance from the second suction hole 22 to the first suction hole 21 is greater than 0.5S, there is a suitable buffer distance between the two, which reduces the hindering effect of the airflow of the second suction hole 22 on the airflow of the first suction hole 21, and improves the compression energy efficiency. When the control valve group is in the closed state, the second suction hole 22 inputs the airflow to the working chamber 2a of the cylinder 2. At this time, the refrigerant supplemented into the working chamber 2a comes from the second suction hole 22, that is, the refrigerant of the second condensing circuit all flows back into the working chamber 2a of the cylinder 2. It can be understood that the closer the second suction hole 22 is to the midpoint between the first dead point and the second dead point, the earlier the second suction hole 22 opens and the later it closes, the longer the high-pressure refrigerant provided by the second condensing circuit, and the greater the amount of air supplement; the closer the second suction hole 22 is to the second dead point, the later the second suction hole 22 opens and the earlier it closes, the shorter the high-pressure refrigerant provided by the second condensing circuit, and the shorter the air supplement time, so the air supplement amount is also less. In reality, the position of the second suction hole 22 can be set according to the demand of the air supplement amount.

[0056] The compression stroke of the cylinder comprises:

[0057] Third stroke: the piston 31 moves from the bottom dead center to the direction close to the top dead center, and the distance from the top dead center is greater than 0.5S. In the third stroke, the control valve group is closed, and the piston 31 moves fast to the direction close to the top dead center. At this time, the second suction hole 22 still inputs the airflow to the working chamber 2a of the cylinder 2. At this time, the refrigerant supplemented into the working chamber 2a comes from the second suction hole 22. Therefore, when the airflow in the working chamber 2a of the cylinder 2 is compressed in the third stroke, the airflow input into the working chamber 2a of the cylinder 2 via the second suction hole 22 is not excessively hindered, so that the cylinder 2 can still suck the airflow in the compression stroke. And because the airflow in the working chamber 2a of the cylinder 2 is mixed with the airflow from the first suction hole 21 and the second suction hole 22, the pressure of the airflow in the working chamber 2a of the cylinder 2 is less than the pressure of the airflow via the second suction hole 22.

[0058] Fourth stroke: the piston 31 moves from the bottom dead center to the direction close to the top dead center, and the distance from the top dead center is less than 0.5S. In the fourth stroke, the control valve group is still closed, and the piston 31 blocks the second suction hole 22. In this process, the piston 31 compresses the airflow in the working chamber 2a of the cylinder 2 into high-pressure airflow. And when the piston 31 moves to the bottom dead center, the pressure of the airflow in the working chamber 2a of the cylinder 2 is compressed to the position. At this time, the control valve group of the output pipeline connected to the working chamber 2a of the cylinder 2 is switched from the closed state to the open state to output the compressed high-pressure airflow.

[0059] The working line of the compressor 100 corresponding to two condensation flow paths is as follows:

[0060] The flow path of the airflow in the first suction flow path is as follows: the first condensation flow path→the first suction hole 21→the working chamber 2a of the cylinder 2.

[0061] The flow path of the airflow in the second suction flow path is as follows: the second condensation flow path→the second suction hole 22→the working chamber 2a of the cylinder 2.

[0062] And the compressor 100 further comprises an inner exhaust pipe connected to the working chamber 2a of the cylinder 2, which is used to communicate with the exhaust outer pipe to exhaust the compressed high-pressure airflow in the working chamber 2a of the cylinder 2 from the inner exhaust pipe to the exhaust outer pipe.

[0063] In a specific embodiment, the first condensing flow path corresponds to the freezer chamber of the refrigerator, and the required refrigeration capacity of the freezer chamber is large, so the required refrigerant amount is large, and the pressure of the refrigerant consumed in the working process is also large. The second condensing flow path corresponds to the refrigerator chamber, and the required refrigeration capacity of the refrigerator chamber is small, so the pressure of the refrigerant consumed is also small. Thus, the pressure of the refrigerant flowing back to the first suction hole 21 is much smaller than the pressure of the second suction hole 22. However, the refrigerant amount of the first condensing flow path is large. Therefore, when the compressor 100 is working, the piston 31 mainly opens the first suction hole 21 to perform main suction in the first half of the suction stroke, so that a large amount of refrigerant in the condensing flow path corresponding to the freezer chamber can be sucked in. In the second half of the suction stroke, the second suction hole 22 is in communication with the working chamber 2a, the first suction hole 21 is closed, the second suction hole 22 starts to supplement the high-pressure refrigerant gas, and continues to supplement the gas in the first half of the compression stroke. Finally, in the second half of the compression stroke, the second suction hole 22 is closed, and the piston 31 compresses the refrigerant in the working chamber 2a. By setting the distance of the second suction hole 22 from the top dead center and the bottom dead center, the intake amount of the second suction hole 22 can be controlled. That is, due to the position of the second suction hole 22, the piston 31 can adjust the opening and closing time of the second suction hole 22 during reciprocating motion, so as to adjust the flow ratio of the first suction hole 21 and the second suction hole 22. Moreover, by arranging the second suction hole 22 on the side wall of the cylinder body 2 and close to the bottom dead center, the compressor 100 does not need to specially arrange a control valve group to control the opening and closing of the second suction hole 22, but can automatically open and close the second suction hole 22 in the active stroke of the piston 31. The structure design is ingenious and saves costs.

[0064] It should be noted that, as shown in Figure 2 , the distance between the top dead center and the bottom dead center is S, that is, the top dead center refers to the position of the end of the piston 31 close to the bottom wall of the cylinder body 2 when the end face of the piston 31 close to the cylinder head of the cylinder body 2 moves to the closest distance to the bottom wall of the cylinder body 2. The bottom dead center refers to the position of the end of the piston 31 close to the bottom wall of the cylinder body 2 when the end face of the piston 31 close to the bottom wall of the cylinder body 2 moves to the farthest distance from the cylinder head of the cylinder body 2. That is, the distance S is the distance between the two extreme states of the end face of the piston 31 close to the bottom wall of the cylinder body 2. The distance between the second suction hole 22 and the top dead center is L, that is, the distance between the center line of the second suction hole 22 and the top dead center is L.

[0065] In addition, in order to achieve the above object, the application further provides a refrigeration equipment comprising the compressor 100. It should be noted that the detailed structure of the compressor 100 of the refrigeration equipment can refer to the above-mentioned embodiments of the compressor 100, which will not be described here again; since the above-mentioned compressor 100 is used in the refrigeration equipment of the application, the embodiments of the refrigeration equipment of the application include all the technical solutions of all the embodiments of the above-mentioned compressor 100, and the technical effects achieved are also completely the same, which will not be described here again.

[0066] It should be noted that the specific form of the refrigeration equipment is not limited, which can be an air conditioner, a fresh air machine or other equipment. Specifically, in the present embodiment, the refrigeration equipment is a refrigerator.

[0067] The above-mentioned is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structural transformation made by using the content of the application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the application.

Claims

1. A compressor characterized by, The compressor comprises: a shell; a cylinder, a bottom of a working chamber of the cylinder being provided with a first suction hole, and a side wall of the cylinder being provided with a second suction hole; a piston assembly, comprising a piston movably arranged in the working chamber; a first external suction pipe for connecting an external first condensing flow path, the first condensing flow path being configured as a freezing condensing flow path; a connecting pipe, two ends of the connecting pipe being connected to the first suction hole and the first external suction pipe, respectively; and a second external suction pipe for connecting an external second condensing flow path, the second condensing flow path being configured as a refrigerating condensing flow path, the second external suction pipe being mounted on a shell wall of the shell to input refrigerant in the external second condensing flow path into the shell and flow into the second suction hole through the shell, wherein a pressure value of the refrigerant in the first external suction pipe is P1, a pressure value of the refrigerant in the shell is P2, and P1 P2 / P1≤6.

2. The compressor of claim 1, wherein, The compressor further comprises a suction silencing device, the suction silencing device being formed with a silencing cavity, and an air inlet and an air outlet communicating with the silencing cavity, the air inlet being communicated with one end of the connecting pipe, and the air outlet being communicated with the first suction hole, so that the refrigerant flowing out of the connecting pipe flows into the cylinder through the silencing cavity.

3. The compressor of claim 1, wherein, The material of the connecting pipe is metal or high polymer material.

4. The compressor of claim 1, wherein, The one end of the connecting pipe is fitted with the air inlet.

5. The compressor of claim 3, wherein, The one end of the connecting pipe is interference-fitted with the air inlet; and / or 6. The compressor of claim 5, wherein, The other end of the connecting pipe is fixed with the first external suction pipe by welding. The connecting pipe comprises at least one bending section.

7. The compressor of claim 1, wherein The piston has a first dead center located at the bottom of the cylinder and a second dead center away from the bottom of the cylinder in the active stroke; 8. The compressor of claim 1, wherein, The distance between the second suction hole and the first dead center is L, and the distance between the first dead center and the second dead center is S, wherein 0.5S The compressor comprises:

9. A refrigeration appliance characterized in that, a shell; 10. The refrigeration appliance of claim 9, wherein, a cylinder, a bottom of a working chamber of the cylinder being provided with a first suction hole, and a side wall of the cylinder being provided with a second suction hole; a piston assembly, comprising a piston movably arranged in the working chamber; a first external suction pipe for connecting an external first condensing flow path, the first condensing flow path being configured as a freezing condensing flow path; a connecting pipe, two ends of the connecting pipe being connected to the first suction hole and the first external suction pipe, respectively; and a second external suction pipe for connecting an external second condensing flow path, the second condensing flow path being configured as a refrigerating condensing flow path, the second external suction pipe being mounted on a shell wall of the shell to input refrigerant in the external second condensing flow path into the shell and flow into the second suction hole through the shell, wherein a pressure value of the refrigerant in the first external suction pipe is P1, a pressure value of the refrigerant in the shell is P2, and P1 P2 / P1≤6. The compressor further comprises a suction silencing device, the suction silencing device being formed with a silencing cavity, and an air inlet and an air outlet communicating with the silencing cavity, the air inlet being communicated with one end of the connecting pipe, and the air outlet being communicated with the first suction hole, so that the refrigerant flowing out of the connecting pipe flows into the cylinder through the silencing cavity. The material of the connecting pipe is metal or high polymer material. The one end of the connecting pipe is fitted with the air inlet. The one end of the connecting pipe is interference-fitted with the air inlet; and / or The other end of the connecting pipe is fixed with the first external suction pipe by welding. The connecting pipe comprises at least one bending section. The piston has a first dead center located at the bottom of the cylinder and a second dead center away from the bottom of the cylinder in the active stroke; The distance between the second suction hole and the first dead center is L, and the distance between the first dead center and the second dead center is S, wherein 0.5S The compressor comprises: a shell; a cylinder, a bottom of a working chamber of the cylinder being provided with a first suction hole, and a side wall of the cylinder being provided with a second suction hole; a piston assembly, comprising a piston movably arranged in the working chamber; a first external suction pipe for connecting an external first condensing flow path, the first condensing flow path being configured as a freezing condensing flow path; a connecting pipe, two ends of the connecting pipe being connected to the first suction hole and the first external suction pipe, respectively; and a second external suction pipe for connecting an external second condensing flow path, the second condensing flow path being configured as a refrigerating condensing flow path, the second external suction pipe being mounted on a shell wall of the shell to input refrigerant in the external second condensing flow path into the shell and flow into the second suction hole through the shell, wherein a pressure value of the refrigerant in the first external suction pipe is P1, a pressure value of the refrigerant in the shell is P2, and P1 P2 / P1≤6. The compressor further comprises a suction silencing device, the suction silencing device being formed with a silencing cavity, and an air inlet and an air outlet communicating with the silencing cavity, the air inlet being communicated with one end of the connecting pipe, and the air outlet being communicated with the first suction hole, so that the refrigerant flowing out of the connecting pipe flows into the cylinder through the silencing cavity. The material of the connecting pipe is metal or high polymer material. The one end of the connecting pipe is fitted with the air inlet. The one end of the connecting pipe is interference-fitted with the air inlet; and / or The other end of the connecting pipe is fixed with the first external suction pipe by welding. The connecting pipe comprises at least one bending section. The piston has a first dead center located at the bottom of the cylinder and a second dead center away from the bottom of the cylinder in the active stroke; The distance between the second suction hole and the first dead center is L, and the distance between the first dead center and the second dead center is S, wherein 0.5S

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