Silencing device, air supply system and air supply control method

Abstract

The invention relates to the technical field of compressors, and provides a silencer, an air supply system and an air supply control method. The silencing device comprises a barrel and a guide pipe assembly, the guide pipe assembly penetrates through the barrel and is provided with a first channel and a second channel, and a third channel and a fourth channel are defined by the outer wall face of the guide pipe assembly and the inner wall face of the barrel. The first channel is communicated with the third channel, the third channel is communicated with the fourth channel, and the fourth channel is communicated with the second channel; an inlet of the first channel is used for inputting refrigerants, and an outlet of the second channel is used for communicating with an inlet of the compressor. The circulating path of a refrigerant passing through the silencer can be prolonged, the frictional resistance when airflow passes through is increased, and sound energy is consumed, so that pressure fluctuation generated by intermittent air suction and exhaust of the compressor is reduced, high-frequency airflow pulsation is reduced, noise of the compressor is reduced, impact of the pressure fluctuation on other parts of a system is relieved, pipeline vibration can be reduced, and the service life of the compressor is prolonged. And the user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a silencing device, a gas supplementing system and a gas supplementing control method. BACKGROUND

[0002] In the field of refrigeration technology, air-cooled screw units have been widely used due to their high efficiency and reliability. Among them, the compressor, as the core component of the refrigeration system, directly determines the energy efficiency and refrigerating capacity of the entire unit. In order to improve the refrigeration effect and energy efficiency ratio of the air-cooled screw unit, intermediate gas supplementing technology is introduced in the design of the compressor. Through intermediate gas supplementing, the compressor can achieve a small increase in power consumption under high compression ratio conditions, while significantly improving refrigerating capacity, efficiency and reliability. The application of this technology enables the air-cooled screw unit to perform well under various conditions, meeting the refrigeration needs in different scenarios.

[0003] However, with the continuous progress of refrigeration technology and the continuous expansion of application scenarios, the noise problem caused by the operation of the air-cooled screw unit has gradually become prominent. The noise sources of the refrigeration compressor are complex and diverse, mainly including mechanical noise, aerodynamic noise and electromagnetic noise. Mechanical noise is caused by the reciprocating inertia force and rotational inertia force of the moving parts inside the compressor; electromagnetic noise is mainly generated by the motor due to the action of the alternating magnetic field on the stator and rotor; and aerodynamic noise is caused by air vibration due to gas flow or movement of objects in the gas. These noises not only affect the operation effect of the unit, but also may cause certain disturbance and discomfort to the surrounding environment and users. SUMMARY

[0004] The present application provides a silencing device, a gas supplementing system and a gas supplementing control method to solve the problem of large noise of the compressor in the gas supplementing system of the prior art, which affects the user experience.

[0005] The present application provides a silencing device, comprising: a cylinder and a conduit assembly, the conduit assembly is arranged in the cylinder, the conduit assembly has a first channel and a second channel, the outer wall surface of the conduit assembly and the inner wall surface of the cylinder form a third channel and a fourth channel; the first channel is in communication with the third channel, the third channel is in communication with the fourth channel, and the fourth channel is in communication with the second channel; wherein the inlet of the first channel is used for inputting refrigerant, and the outlet of the second channel is used for communicating with the inlet of the compressor. This feature prolongs the flow path of the refrigerant through the silencing device, increases the frictional resistance when the gas flow passes through, consumes sound energy, thereby reducing the pressure fluctuation caused by the intermittent suction and exhaust of the compressor, and reducing the noise of the compressor.

[0006] The sound attenuation device provided by the application further comprises a first end cover and a second end cover, both ends of the barrel are provided with openings, the first end cover and the second end cover are respectively arranged at the openings, the inlet end of the first channel is arranged through the first end cover, and the outlet end of the second channel is arranged through the second end cover, thereby facilitating installation.

[0007] The sound attenuation device provided by the application comprises a first conduit, a second conduit and a baffle, the first conduit and the second conduit are connected through the baffle, the outer wall surface of the baffle is attached to the inner wall surface of the barrel, the outer wall surface of the first conduit, the baffle, the inner wall surface of the barrel and the first end cover form the third channel, the outer wall surface of the second conduit, the baffle, the inner wall surface of the barrel and the second end cover form the fourth channel, the outer wall surface of the first conduit is provided with a first liquid guide hole, the outer wall surface of the second conduit is provided with a second liquid guide hole, and the baffle is provided with a third liquid guide hole, the third liquid guide hole is located between the outer wall surface of the first conduit and the inner wall surface of the barrel. This feature can absorb part of the energy, reduce the pressure generated by the air supplement system, and can reduce the pipeline vibration and the compressor noise.

[0008] The sound attenuation device provided by the application comprises a first conduit, a second conduit and a baffle, the first conduit and the second conduit are connected through the baffle, the outer wall surface of the baffle is attached to the inner wall surface of the barrel, the outer wall surface of the first conduit, the baffle, the inner wall surface of the barrel and the first end cover form the third channel, the outer wall surface of the second conduit, the baffle, the inner wall surface of the barrel and the second end cover form the fourth channel, the outer wall surface of the first conduit is provided with a first liquid guide hole, the outer wall surface of the second conduit is provided with a second liquid guide hole, and the baffle is provided with a third liquid guide hole, the third liquid guide hole is located between the outer wall surface of the first conduit and the inner wall surface of the barrel. This feature can absorb part of the energy, reduce the pressure generated by the air supplement system, and can reduce the pipeline vibration and the compressor noise.

[0009] The sound attenuation device provided by the application comprises a first conduit, a second conduit and a baffle, the first conduit and the second conduit are connected through the baffle, the outer wall surface of the baffle is attached to the inner wall surface of the barrel, the outer wall surface of the first conduit, the baffle, the inner wall surface of the barrel and the first end cover form the third channel, the outer wall surface of the second conduit, the baffle, the inner wall surface of the barrel and the second end cover form the fourth channel, the outer wall surface of the first conduit is provided with a first liquid guide hole, the outer wall surface of the second conduit is provided with a second liquid guide hole, and the baffle is provided with a third liquid guide hole, the third liquid guide hole is located between the outer wall surface of the first conduit and the inner wall surface of the barrel. This feature can absorb part of the energy, reduce the pressure generated by the air supplement system, and can reduce the pipeline vibration and the compressor noise.

[0010] The sound attenuation device provided by the application comprises a first conduit, a second conduit and a baffle, the first conduit and the second conduit are connected through the baffle, the outer wall surface of the baffle is attached to the inner wall surface of the barrel, the outer wall surface of the first conduit, the baffle, the inner wall surface of the barrel and the first end cover form the third channel, the outer wall surface of the second conduit, the baffle, the inner wall surface of the barrel and the second end cover form the fourth channel, the outer wall surface of the first conduit is provided with a first liquid guide hole, the outer wall surface of the second conduit is provided with a second liquid guide hole, and the baffle is provided with a third liquid guide hole, the third liquid guide hole is located between the outer wall surface of the first conduit and the inner wall surface of the barrel. This feature can absorb part of the energy, reduce the pressure generated by the air supplement system, and can reduce the pipeline vibration and the compressor noise.

[0011] The sound attenuation device provided by the application comprises a first conduit, a second conduit and a baffle, the first conduit and the second conduit are connected through the baffle, the outer wall surface of the baffle is attached to the inner wall surface of the barrel, the outer wall surface of the first conduit, the baffle, the inner wall surface of the barrel and the first end cover form the third channel, the outer wall surface of the second conduit, the baffle, the inner wall surface of the barrel and the second end cover form the fourth channel, the outer wall surface of the first conduit is provided with a first liquid guide hole, the outer wall surface of the second conduit is provided with a second liquid guide hole, and the baffle is provided with a third liquid guide hole, the third liquid guide hole is located between the outer wall surface of the first conduit and the inner wall surface of the barrel. This feature can absorb part of the energy, reduce the pressure generated by the air supplement system, and can reduce the pipeline vibration and the compressor noise.

[0012] The sound attenuation device provided by the application further comprises a first end cover and a second end cover, both ends of the barrel are provided with openings, the first end cover and the second end cover are respectively arranged at the openings, the inlet end of the first channel is arranged through the first end cover, and the outlet end of the second channel is arranged through the second end cover, thereby facilitating installation.

[0013] The gas supplement system further comprises a temperature sensor and a pressure sensor, both of which are arranged at the outlet of the economizer, for obtaining the current temperature and the current pressure at the outlet of the economizer and determining the saturation temperature corresponding to the current pressure, so as to determine the superheat degree.

[0014] The application further provides a gas supplement control method based on the above-mentioned gas supplement system, comprising: obtaining the current operation load of the compressor and the operation duration of the compressor under the current operation load; in the case that the current operation load is greater than or equal to a first operation load and the operation duration is greater than or equal to a first preset duration, obtaining the current temperature and the current pressure at the outlet of the economizer and determining the saturation temperature corresponding to the current pressure; determining the superheat degree based on the current temperature and the saturation temperature corresponding to the current pressure; adjusting the opening degree of the gas supplement control valve based on the superheat degree; in the case that the current operation load is less than or equal to a second operation load and the operation duration is greater than or equal to a second preset duration, controlling the gas supplement control valve to be closed; wherein the first operation load is greater than the second operation load. This feature adjusts the opening degree of the gas supplement control valve to adjust the gas supplement amount of the compressor, so as to improve the system refrigerating capacity and has high reliability.

[0015] The gas supplement control method provided by the application adjusts the opening degree of the gas supplement control valve based on the superheat degree, comprising: in the case that the superheat degree is in a growth trend, increasing the opening degree of the gas supplement control valve; in the case that the superheat degree is in a reduction trend, reducing the opening degree of the gas supplement control valve. This feature adjusts the opening degree of the gas supplement control valve based on the trend of the superheat degree, so as to make the compressor operate in an optimal range and improve the refrigerating capacity of the compressor.

[0016] According to the present invention, a supplementary air control method is provided, which adjusts the opening of a supplementary air control valve based on the superheat, and further includes: obtaining a current opening of the supplementary air control valve; if the current opening is greater than a first preset opening and less than or equal to a second preset opening, and the superheat is greater than or equal to a first preset temperature and less than a second preset temperature, controlling the supplementary air control valve to increase or decrease by a first adjustment amount at intervals of a third preset duration; if the current opening is greater than the second preset opening and less than or equal to a third preset opening, and the superheat is greater than the second preset temperature and less than or equal to a third preset temperature, controlling the supplementary air control valve to increase or decrease by a second adjustment amount at intervals of a third preset duration, wherein the second adjustment amount is greater than the first adjustment amount; and if the current opening is greater than the third preset opening and the superheat is greater than the third preset temperature, controlling the supplementary air control valve to increase or decrease by a third adjustment amount at intervals of a third preset duration, wherein the third adjustment amount is greater than the second adjustment amount. This feature enables precise control of the supplementary air volume of the compressor, allowing the compressor to operate within an optimal range, thereby improving the cooling capacity of the system and enhancing reliability.

[0017] The silencer, air supply system and air supply control method provided by the present invention provide a conduit assembly in the cylinder, and the conduit assembly forms a first channel, a third channel, a fourth channel and a second channel that are connected in sequence with the inner wall of the cylinder, thereby extending the flow path of the refrigerant through the silencer, increasing the friction resistance of the airflow when passing through, consuming sound energy, thereby reducing the pressure fluctuations caused by the intermittent suction and exhaust of the compressor, reducing high-frequency airflow pulsation, reducing the noise of the compressor, reducing the impact of pressure fluctuations on other components of the system, and reducing pipeline vibration, thereby improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the structural schematic diagrams of the silencer provided by the present invention;

[0020] Figure 2 yes Figure 1 One of the exploded views of the silencer shown;

[0021] Figure 3 yes Figure 1 The second exploded view of the silencer device shown;

[0022] Figure 4 This is the second structural diagram of the silencer provided by the present invention;

[0023] Figure 5 is Figure 4 an exploded view of the silencing device shown in Fig. 1;

[0024] Figure 6 is a structural principle schematic diagram of the air supplementing system;

[0025] Figure 7 is a structural schematic diagram of the air supplementing control method provided by the present application;

[0026] Figure 8 is a structural schematic diagram of the electronic device provided by the present application;

[0027] Reference signs:

[0028] 1, barrel; 2, catheter assembly; 21, first catheter; 211, first liquid guide hole; 22, second catheter; 221, second liquid guide hole; 23, baffle; 231, third liquid guide hole; 3, first end cover; 4, second end cover. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0032] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance of the indicated elements or an ordering. Thus, features defined with "first", "second" etc. can include one or more of the features implicitly or explicitly.

[0033] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters are used throughout the figures to denote the same components. The embodiments described below are exemplary in nature, and are intended to be illustrative of the present application rather than to limit the present application.

[0034] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of the specific examples below are described in detail. It should be noted that the examples described below are merely meant to be illustrative and are not to be taken in a limiting sense. Furthermore, the present application can refer to a number of different embodiments in different examples. Such repetition is for the sake of simplicity and clarity and is not itself indicative of a relationship between the different embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art can realize that other processes are applicable and / or other materials can be used.

[0035] The following description is provided in relation to the drawings. Figures 1 to 8 The present application provides a sound attenuation device, a gas supplement system and a gas supplement control method.

[0036] The sound attenuation device provided by the embodiments of the present application comprises a cylinder 1 and a conduit assembly 2, the conduit assembly 2 is arranged in the cylinder 1, the conduit assembly 2 has a first channel and a second channel, and the outer wall surface of the conduit assembly 2 and the inner wall surface of the cylinder 1 form a third channel and a fourth channel. The first channel is in communication with the third channel, the third channel is in communication with the fourth channel, and the fourth channel is in communication with the second channel. The inlet of the first channel is used for inputting refrigerant, and the outlet of the second channel is used for being in communication with the inlet of the compressor.

[0037] Specifically, when the refrigerant two-phase of the air supplement system enters the compressor through the silencing device, the refrigerant enters through the inlet of the first channel, the first channel is communicated with the third channel, a liquid guide hole can be arranged on the outer wall surface of the first channel, the refrigerant in the first channel enters the third channel through the liquid guide hole on the first channel, and is mixed at a reduced speed in the third channel; further, the third channel is communicated with the fourth channel, the mixed refrigerant enters the fourth channel to be mixed at a reduced speed again; the fourth channel is communicated with the second channel, a liquid guide hole can be arranged on the outer wall surface of the second channel, the refrigerant in the fourth channel enters the second channel through the liquid guide hole on the second channel, and enters the compressor through the outlet of the second channel. The silencing device of the embodiment of the present application can absorb part of the energy, reduce the pressure generated by the air supplement system, and reduce the pipeline vibration and the noise of the compressor.

[0038] The silencing device provided by the embodiment of the present application can prolong the flow path of the refrigerant through the silencing device, increase the friction resistance when the gas flow passes through, consume sound energy, thereby reducing the pressure fluctuation generated by the intermittent suction and exhaust of the compressor, reducing the high-frequency gas flow pulsation, reducing the noise of the compressor, reducing the impact of the pressure fluctuation on other components of the system, and reducing the pipeline vibration, thereby improving the user experience.

[0039] The silencing device provided by the embodiment of the present application further comprises a first end cover 3 and a second end cover 4, both ends of the cylinder body 1 are provided with openings, the first end cover 3 and the second end cover 4 are respectively arranged at the two openings, the inlet end of the first channel is arranged through the first end cover 3, and the outlet end of the second channel is arranged through the second end cover 4.

[0040] The embodiment of the present application sets the openings at both ends of the cylinder body 1, which helps to arrange the pipe assembly 2 in the cylinder body 1, and facilitates installation. After the pipe assembly 2 is installed, the first end cover 3 and the second end cover 4 are welded at both ends of the cylinder body 1, and the installation of the silencing device is completed.

[0041] It should be noted that the first end cover 3 and the second end cover 4 are provided with through holes, the inlet end of the first channel is arranged through the through hole on the first end cover 3 for inputting the refrigerant, and the outlet end of the second channel is arranged through the through hole on the second end cover 4 for being communicated with the inlet of the compressor.

[0042] The size of the first end cover 3 and the second end cover 4 matches the cylinder body 1, and the first end cover 3 and the second end cover 4 can be connected with the cylinder body 1 by welding.

[0043] Further, the conduit assembly 2 provided by the embodiment of the present application comprises a first conduit 21, a second conduit 22 and a baffle 23. The first conduit 21 and the second conduit 22 are connected through the baffle 23, the outer wall surface of the baffle 23 is attached to the inner wall surface of the cylinder body 1, the outer wall surface of the first conduit 21, the baffle 23, the inner wall surface of the cylinder body 1 and the first end cover 3 surround to form a third channel, and the outer wall surface of the second conduit 22, the baffle 23, the inner wall surface of the cylinder body 1 and the second end cover 4 surround to form a fourth channel.

[0044] The outer wall surface of the first conduit 21 is provided with a first liquid guide hole 211, the outer wall surface of the second conduit 22 is provided with a second liquid guide hole 221, and the baffle 23 is provided with a third liquid guide hole 231 located between the outer wall surface of the first conduit 21 and the inner wall surface of the cylinder body 1.

[0045] Specifically, the first conduit 21 and the second conduit 22 are respectively connected with the opposite sides of the baffle 23, the first conduit 21 and the baffle 23 can be connected by welding, and the second conduit 22 and the baffle 23 are connected; wherein the size of the baffle 23 matches the size of the cylinder body 1, the size of the baffle 23 is greater than the diameter of the first conduit 21 and greater than the diameter of the second conduit 22. The conduit assembly 2 is inserted into the cylinder body 1, the first conduit 21 and the second conduit 22 respectively have a spacing with the inner wall surface of the cylinder body 1, the outer wall surface of the baffle 23 is attached to the inner wall surface of the cylinder body 1, and the first end cover 3 and the second end cover 4 are covered on both ends of the cylinder body 1, wherein the inlet end of the first conduit 21 penetrates through the first end cover 3 for inputting refrigerant, and the outlet end of the second conduit 22 penetrates through the second end cover 4 for communicating with the inlet of the compressor.

[0046] The cylinder body 1 is divided into four parts, the first conduit 21 forms a first channel, the outer wall surface of the first conduit 21, the inner wall surface of the cylinder body 1, the first end cover 3 and the baffle 23 form a third channel; the outer wall surface of the second conduit 22, the inner wall surface of the cylinder body 1, the second end cover 4 and the baffle 23 form a fourth channel, and the second conduit 22 forms a second channel.

[0047] Further, the outer wall surface of the first conduit 21 is provided with a first liquid guide hole 211 to realize the communication between the first channel and the third channel; the baffle 23 between the outer wall surface of the first conduit 21 and the inner wall surface of the cylinder body 1 is provided with a third liquid guide hole 231, that is, the baffle 23 between the outer wall surface of the second conduit 22 and the inner wall surface of the cylinder body 1 is provided with a third liquid guide hole 231, the third channel and the fourth channel are communicated through the third liquid guide hole 231; the outer wall surface of the second conduit 22 is provided with a second liquid guide hole 221, and the fourth channel is communicated with the second channel through the second liquid guide hole 221.

[0048] When the refrigerant of the air supplement system enters the compressor through the silencing device, the refrigerant enters through the inlet of the first guide pipe 21, enters the third channel through the first guide hole 211, and is mixed at a low speed; the mixed refrigerant enters the fourth channel through the third guide hole 231 and is mixed at a low speed again, and finally enters the second guide pipe 22 through the second guide hole 221, and enters the compressor through the second guide pipe 22.

[0049] The first guide hole 211, the second guide hole 221 and the third guide hole 231 in the embodiment of the application can all be multiple.

[0050] As shown in Figure 3 and Figure 5 , the first guide pipe 21 is provided with multiple rows of first guide holes 211, and the multiple rows of first guide holes 211 are arranged at intervals along the extension direction of the first guide pipe 21, and each row of first guide holes 211 is provided with multiple first guide holes 211, and the multiple first guide holes 211 are arranged at intervals along the circumferential direction of the first guide pipe 21.

[0051] Similarly, the second guide pipe 22 is provided with multiple rows of second guide holes 221, and the multiple rows of second guide holes 221 are arranged at intervals along the extension direction of the second guide pipe 22, and each row of second guide holes 221 is provided with multiple second guide holes 221, and the multiple second guide holes 221 are arranged at intervals along the circumferential direction of the second guide pipe 22.

[0052] As shown in Figure 3 and Figure 5 , the baffle 23 is provided with multiple third guide holes 231, and the multiple third guide holes 231 are arranged at intervals along the circumferential direction of the baffle 23. In an embodiment, the baffle 23 is provided with eight third guide holes 231, and the eight third guide holes 231 are uniformly distributed along the circumferential direction of the baffle 23.

[0053] The first guide pipe 21, the second guide pipe 22 and the cylinder body 1 in the embodiment of the application are coaxially arranged, which is helpful for refrigerant mixing, absorption of sound energy and improvement of the silencing effect of the silencing device.

[0054] The inner diameter of the first guide pipe 21 and the inner diameter of the second guide pipe 22 are equal, and the inner diameter of the cylinder body 1 is twice the inner diameter of the first guide pipe 21. Among them, the inner diameter of the first guide pipe 21 and the inner diameter of the second guide pipe 22 can be set according to the displacement of the compressor, for example, when the displacement of the compressor is 300 m 3 / h, the inner diameter of the first guide pipe 21 and the inner diameter of the second guide pipe 22 are both 22 mm, and the inner diameter of the cylinder body 1 is 44 mm. The relationship between the displacement of the compressor and the inner diameter of the first guide pipe 21 (the second guide pipe 22) is shown in Table 1:

[0055] Table 1 Relationship between displacement of compressor and inner diameter of first guide pipe 21 (second guide pipe 22)

[0056] Compressor displacement m 3 / h]]> Silencer duct internal diameter Dd / mm 200-500 22 500-800 25 800-1200 32

[0057] The third liquid guide holes 231 are arranged on the baffle 23, and the total area of the third liquid guide holes 231 is equal to 1.1-1.2 times of the flow area of the first conduit 21, that is, the total area of the third liquid guide holes 231 is equal to 1.1-1.2 times of the flow area of the second conduit 22.

[0058] In an embodiment, the baffle 23 is provided with n3 third liquid guide holes 231, the n3 third liquid guide holes 231 are uniformly distributed along the circumference of the baffle 23, the inner diameter of the third liquid guide hole 231 is Dy, and the total area of the n3 third liquid guide holes 231 is equal to 1.1-1.2 times of the flow area of the first conduit 21 (the second conduit 22), that is, 3.14*(Dy / 2) 2 *n3=(1.1-1.2)*3.14*(Dd / 2) 2 , wherein the number of the third liquid guide holes 231 is not specifically limited, and is set according to actual conditions, for example, n3 is 8.

[0059] In the embodiment of the application, the first conduit 21 is provided with n1 first liquid guide holes 211, the diameter of the first liquid guide hole 211 is D1, and the total area of the n1 first liquid guide holes 211 is equal to 1.5-2 times of the total area of the n3 third liquid guide holes 231, that is, 3.14*(D1 / 2) 2 *n1=(1.5-2)*3.14*(Dy / 2) 2 *n3. Wherein the number of the first liquid guide holes 211 is not specifically limited, and is set according to actual conditions, for example, 3 rows are arranged, and 8 are arranged in each row, that is, n1 is 24.

[0060] In the embodiment of the application, the second conduit 22 is provided with n2 second liquid guide holes 221, the diameter of the second liquid guide hole 221 is D1, and the total area of the n2 first liquid guide holes 211 is equal to 1.5-2 times of the total area of the n3 third liquid guide holes 231, that is, 3.14*(D1 / 2) 2 =(1.5-2)*3.14*(Dy / 2) 2 *n3. Wherein the number of the first liquid guide holes 211 is not specifically limited, and is set according to actual conditions, for example, 3 rows are arranged, and 8 are arranged in each row, that is, n2 is 24.

[0061] In the embodiment of the application, the first conduit 21 and the second conduit 22 can be threaded connection pipes, as shown in Figure 1 and Figure 2 , or can be connecting pipes, as shown in Figure 4 and Figure 5 . The structures of the first conduit 21 and the second conduit 22 can be the same or different.

[0062] The application also provides a gas supplement system, comprising the sound attenuation device in any of the above embodiments, and further comprising a compressor, a gas supplement control valve and an economizer, the sound attenuation device is arranged between the outlet of the economizer and the inlet of the compressor, and the gas supplement control valve is arranged at the inlet of the economizer and used to adjust the amount of input refrigerant so that the compressor operates in an optimal range and the refrigerating capacity is improved.

[0063] Reference Figure 6 In the refrigeration process, the compressor sucks gas from the gas-liquid separator, the gaseous refrigerant is compressed by the compressor, enters the heat exchanger (e.g., a fin heat exchanger) through the discharge pipe, is cooled by the heat exchanger, enters the evaporator through the distributor, the drying filter and the economizer, is cooled by the evaporator, and then enters the gas-liquid separator again to complete a refrigeration cycle.

[0064] In the heating process, the compressor sucks gas from the gas-liquid separator, the gaseous refrigerant is compressed by the compressor, enters the evaporator through the discharge pipe, heats the water in the evaporator, enters the heat exchanger (e.g., a fin heat exchanger) through the drying filter and the distributor, absorbs heat, and then enters the gas-liquid separator to complete a heating cycle.

[0065] In the gas supplement process, the inlet of the economizer is communicated with the outlet of the drying filter for input of the refrigerant. The gas supplement control valve is arranged at the inlet of the economizer and used to adjust the amount of refrigerant entering the economizer. The outlet of the economizer is communicated with the inlet of the sound attenuation device, and the outlet of the sound attenuation device is communicated with the inlet of the compressor. The refrigerant processed by the sound attenuation device enters the compressor to complete a gas supplement cycle.

[0066] Further, the gas supplement system further comprises a temperature sensor and a pressure sensor, both of which are arranged at the outlet of the economizer. The temperature sensor is used to obtain the temperature at the outlet of the economizer, and the pressure sensor is used to obtain the pressure at the outlet of the economizer, and the corresponding saturation temperature can be obtained based on the pressure. It should be noted that the pressure corresponding to the saturation temperature can be found through a refrigerant pressure-temperature table.

[0067] The embodiment of the application adds a gas supplement system in the refrigeration or heating cycle of the air conditioner. In the high pressure ratio working condition, the refrigerant entering the intermediate pressure chamber of the compressor is increased, so that the refrigerating capacity, efficiency and reliability of the unit are improved. The embodiment of the application further reduces the operating noise of the system and improves the user experience by adding a sound attenuation device in the gas supplement system to reduce the noise of the compressor. The sound attenuation device in the embodiment of the application is designed based on the displacement of the compressor. The sound attenuation device has a simple structure and is convenient to produce and process. The structure connection mode can be selected as a threaded type or a pipe connection type according to the needs of the system.

[0068] Reference Figure 7The embodiment of the present application also provides a gas supplement control method, comprising: step 100, acquiring the current operation load of the compressor and the operation duration of the compressor under the current operation load; step 200, acquiring the current temperature and the current pressure of the economizer outlet and determining the saturation temperature corresponding to the current pressure when the current operation load is greater than or equal to a first operation load and the operation duration is greater than or equal to a first preset duration; step 300, determining the superheat degree based on the current temperature and the saturation temperature corresponding to the current pressure; step 400, adjusting the opening of the gas supplement control valve based on the superheat degree; and step 500, controlling the gas supplement control valve to be closed when the current operation load is less than or equal to a second operation load and the operation duration is greater than or equal to a second preset duration; wherein the first operation load is greater than the second operation load.

[0069] In one embodiment, the compressor is in an operation state, the current operation load of the compressor is greater than or equal to the maximum operation load, and the operation duration of the current operation load is greater than or equal to a first preset duration (such as 5s), the current temperature and the current pressure of the economizer outlet are acquired, the saturation temperature corresponding to the current pressure is inquired based on the current pressure, wherein the superheat degree is equal to the difference between the current temperature and the saturation temperature corresponding to the current pressure; the opening of the gas supplement control valve is adjusted based on the superheat degree, that is, the opening of the gas supplement control valve is increased or decreased, the gas supplement amount of the compressor is adjusted, the compressor is operated in an optimal range, and thus the refrigerating capacity of the system is improved.

[0070] In the case that the current operation load of the compressor is less than or equal to 75% of the maximum operation load and the duration is greater than or equal to a second preset duration (5s), the gas supplement control valve is controlled to be closed and the gas supplement is stopped. The relationship between the first preset duration and the second preset duration in the embodiment is not specifically limited, which can be the same or different.

[0071] Further, the opening of the gas supplement control valve is adjusted based on the superheat degree; comprising: in the case that the superheat degree is in a growth trend, the opening of the gas supplement control valve is controlled to be increased; and in the case that the superheat degree is in a decrease trend, the opening of the gas supplement control valve is controlled to be decreased.

[0072] The detection cycle in the embodiment of the present application can be 3s, that is, the current temperature and the current pressure are detected every 3s, the superheat degree is determined, and the change trend of the superheat degree is determined based on the superheat degrees of adjacent two times.

[0073] The opening degree of the air supplement control valve is adjusted based on the superheat degree. The method further comprises: obtaining a current opening degree of the air supplement control valve; in a case where the current opening degree is greater than a first preset opening degree and less than or equal to a second preset opening degree, the superheat degree is greater than or equal to a first preset temperature and less than a second preset temperature, the air supplement control valve is controlled to increase or decrease by a first adjustment amount every third preset time interval; in a case where the current opening degree is greater than the second preset opening degree and less than or equal to a third preset opening degree, the superheat degree is greater than the second preset temperature and less than or equal to a third preset temperature, the air supplement control valve is controlled to increase or decrease by a second adjustment amount every third preset time interval; the second adjustment amount is greater than the first adjustment amount; and in a case where the current opening degree is greater than the third preset opening degree and the superheat degree is greater than the third preset temperature, the air supplement control valve is controlled to increase or decrease by a third adjustment amount every third preset time interval, the third adjustment amount being greater than the second adjustment amount.

[0074] In one embodiment, the first preset opening degree is 0 pls, the second preset opening degree is equal to 100 pls, the third preset opening degree is 300 pls, the first preset temperature is 0 ℃, the second preset temperature is 2 ℃, and the third preset temperature is 5 ℃. In a case where the current opening degree of the air supplement control valve is greater than 0 pls and less than or equal to 100 pls, and the superheat degree is greater than or equal to 1 ℃ and less than 2 ℃, the opening degree of the air supplement control valve is adjusted based on the change trend of the superheat degree. Specifically, if the superheat degree is in a growth trend, the opening degree of the air supplement control valve is increased, and the opening degree is increased by the first adjustment amount (10 pls) every third preset time interval; if the superheat degree is in a decreasing trend, the opening degree of the air supplement control valve is decreased, and the opening degree is decreased by the first adjustment amount (10 pls) every third preset time interval.

[0075] In a case where the current opening degree of the air supplement control valve is greater than 100 pls and less than or equal to 300 pls, and the superheat degree is greater than or equal to 2 ℃ and less than 5 ℃, the opening degree of the air supplement control valve is adjusted based on the change trend of the superheat degree. Specifically, if the superheat degree is in a growth trend, the opening degree of the air supplement control valve is increased, and the opening degree is increased by the second adjustment amount (for example, the second adjustment amount = the first adjustment amount + 15 pls = 25 pls) every third preset time interval; if the superheat degree is in a decreasing trend, the opening degree of the air supplement control valve is decreased, and the opening degree is decreased by the second adjustment amount (25 pls) every third preset time interval.

[0076] In the case that the current opening degree of the gas supplement control valve is greater than 300 pls and the superheat is greater than or equal to 5℃, the opening degree of the gas supplement control valve is adjusted based on the change trend of the superheat. Specifically, if the superheat is in a growth trend, the opening degree of the gas supplement control valve is increased, and the opening degree is increased by a third adjustment amount (for example, the third adjustment amount = the second adjustment amount + 35 pls = 60 pls) every third preset time interval; if the superheat is in a decreasing trend, the opening degree of the gas supplement valve is decreased, and the opening degree is decreased by the third adjustment amount (60 pls) every third preset time interval. The third preset time interval in the embodiment of the application is not specifically limited and can be set according to actual conditions.

[0077] The embodiment of the application can accurately control the gas supplement amount of the compressor, so that the compressor operates in an optimal range, thereby improving the system refrigerating capacity and having high reliability.

[0078] Figure 8 is a structural schematic diagram of an electronic device, as shown in Figure 8 The electronic device can include a processor 810, a communications interface 820, a memory 830 and a communications bus 840, wherein the processor 810, the communications interface 820 and the memory 830 complete communication with each other through the communications bus 840. The processor 810 can call logical instructions in the memory 830 to execute a gas supplement control method, which includes: obtaining a current operating load of a compressor and a running time length of the compressor in the current operating load state; in the case that the current operating load is greater than or equal to a first operating load and the running time length is greater than or equal to a first preset time length, obtaining a current temperature and a current pressure of an economizer outlet and determining a saturation temperature corresponding to the current pressure; determining a superheat based on the current temperature and the saturation temperature corresponding to the current pressure; adjusting the opening degree of a gas supplement control valve based on the superheat; in the case that the current operating load is less than or equal to a second operating load and the running time length is greater than or equal to a second preset time length, controlling the gas supplement control valve to be closed; wherein the first operating load is greater than the second operating load.

[0079] Further, the logic instructions in the memory 830 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0080] In another aspect, the present application also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the gas supplementation control method provided by any of the methods described above, the method comprising: obtaining a current operating load of the compressor and a running duration of the compressor in the current operating load state; in a case where the current operating load is greater than or equal to a first operating load and the running duration is greater than or equal to a first preset duration, obtaining a current temperature and a current pressure of the economizer outlet, and determining a saturation temperature corresponding to the current pressure; determining a superheat degree based on the current temperature and the saturation temperature corresponding to the current pressure; adjusting an opening degree of the gas supplementation control valve based on the superheat degree; in a case where the current operating load is less than or equal to a second operating load and the running duration is greater than or equal to a second preset duration, controlling the gas supplementation control valve to be closed; wherein the first operating load is greater than the second operating load.

[0081] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the gas supplementation control method provided by any of the methods described above, the method comprising: obtaining a current operating load of the compressor and a running duration of the compressor in the current operating load state; in a case where the current operating load is greater than or equal to a first operating load and the running duration is greater than or equal to a first preset duration, obtaining a current temperature and a current pressure of the economizer outlet, and determining a saturation temperature corresponding to the current pressure; determining a superheat degree based on the current temperature and the saturation temperature corresponding to the current pressure; adjusting an opening degree of the gas supplementation control valve based on the superheat degree; in a case where the current operating load is less than or equal to a second operating load and the running duration is greater than or equal to a second preset duration, controlling the gas supplementation control valve to be closed; wherein the first operating load is greater than the second operating load.

[0082] The device embodiments described above are merely illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0083] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, and the computer software products can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods of the embodiments or some parts of the embodiments.

[0084] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound attenuating device, characterized in that It comprises: a cylinder (1) and a conduit assembly (2) which is arranged in the cylinder (1), the conduit assembly (2) having a first channel and a second channel, the outer wall surface of the conduit assembly (2) and the inner wall surface of the cylinder (1) surrounding to form a third channel and a fourth channel; the first channel is communicated with the third channel, the third channel is communicated with the fourth channel, and the fourth channel is communicated with the second channel; wherein the inlet of the first channel is used for inputting refrigerant, and the outlet of the second channel is used for being communicated with the inlet of the compressor.

2. The sound attenuating device of claim 1, wherein, It also comprises a first end cover (3) and a second end cover (4), both ends of the cylinder (1) are provided with openings, the first end cover (3) and the second end cover (4) are respectively arranged at the two openings, the inlet end of the first channel is arranged in the first end cover (3), and the outlet end of the second channel is arranged in the second end cover (4).

3. The sound attenuating device of claim 2, wherein, The conduit assembly (2) comprises a first conduit (21), a second conduit (22) and a baffle (23), the first conduit (21) and the second conduit (22) are connected through the baffle (23), the outer wall surface of the baffle (23) is attached to the inner wall surface of the cylinder (1), the outer wall surface of the first conduit (21), the baffle (23), the inner wall surface of the cylinder (1) and the first end cover (3) surround to form the third channel, and the outer wall surface of the second conduit (22), the baffle (23), the inner wall surface of the cylinder (1) and the second end cover (4) surround to form the fourth channel; The outer wall surface of the first conduit (21) is provided with a first liquid guide hole (211), the outer wall surface of the second conduit (22) is provided with a second liquid guide hole (221), and the baffle (23) is provided with a third liquid guide hole (231), the third liquid guide hole (231) is located between the outer wall surface of the first conduit (21) and the inner wall surface of the cylinder (1).

4. The sound attenuating device of claim 3, wherein, The first conduit (21), the second conduit (22) and the cylinder (1) are coaxially arranged.

5. A sound attenuating device according to claim 3 or 4, characterised in that, The inner diameter of the first conduit (21) and the inner diameter of the second conduit (22) are equal, and the inner diameter of the cylinder (1) is 2 times the inner diameter of the first conduit (21).

6. The sound attenuating device of claim 5, wherein, The third liquid guide hole (231) is a plurality of, and the total area of the third liquid guide hole (231) is equal to 1.1-1.2 times the flow cross-sectional area of the first conduit (21).

7. The sound attenuating device of claim 6, wherein, The first liquid guide hole (211) and the second liquid guide hole (221) are a plurality of, the total area of the first liquid guide hole (211) is equal to 1.5-2 times the total area of the third liquid guide hole (231); and the total area of the second liquid guide hole (221) is equal to 1.5-2 times the total area of the third liquid guide hole (231).

8. A gas make-up system characterized by, It comprises the silencing device as claimed in any one of claims 1 to 7, further comprising a compressor, a charge control valve and an economizer, the silencing device is arranged between the outlet of the economizer and the inlet of the compressor, and the charge control valve is arranged at the inlet of the economizer.

9. The air supplementation system of claim 8, wherein, Also included are a temperature sensor and a pressure sensor, both of which are disposed at an outlet of the economizer.

10. A method of control of air make-up, based on an air make-up system as claimed in claim 8 or 9, characterized in that Comprise: Obtaining a current operating load of the compressor, and a running duration of the compressor in the current operating load state; In the case that the current operating load is greater than or equal to a first operating load, and the running duration is greater than or equal to a first preset duration, obtaining a current temperature and a current pressure of an outlet of the economizer, and determining a saturation temperature corresponding to the current pressure; Based on the current temperature and the saturation temperature corresponding to the current pressure, determining a superheat degree; Based on the superheat degree, adjusting an opening degree of a supplementary air control valve; In the case that the current operating load is less than or equal to a second operating load, and the running duration is greater than or equal to a second preset duration, controlling the supplementary air control valve to be closed; wherein the first operating load is greater than the second operating load.

11. The method of recharging control according to claim 10, wherein Based on the superheat degree, adjusting an opening degree of a supplementary air control valve; comprising: In the case that the superheat degree is in a growing trend, controlling the opening degree of the supplementary air control valve to increase; In the case that the superheat degree is in a decreasing trend, controlling the opening degree of the supplementary air control valve to decrease.

12. The method of recharging control according to claim 11, wherein Based on the superheat degree, adjusting an opening degree of a supplementary air control valve; further comprising: Obtaining a current opening degree of the supplementary air control valve; In the case that the current opening degree is greater than a first preset opening degree, less than or equal to a second preset opening degree, the superheat degree is greater than or equal to a first preset temperature, less than a second preset temperature, every third preset duration, controlling the supplementary air control valve to increase or decrease by a first adjustment amount; In the case that the current opening degree is greater than the second preset opening degree, less than or equal to a third preset opening degree, the superheat degree is greater than a second preset temperature, less than or equal to a third preset temperature, every third preset duration, controlling the supplementary air control valve to increase or decrease by a second adjustment amount; the second adjustment amount is greater than the first adjustment amount; In the case that the current opening degree is greater than the third preset opening degree, the superheat degree is greater than a third preset temperature, every third preset duration, controlling the supplementary air control valve to increase or decrease by a third adjustment amount, the third adjustment amount is greater than the second adjustment amount.

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