Method and device for controlling compressor fluid pulsation

Abstract

The embodiments of the present application relate to a method and device for controlling fluid pulsation in a compressor, wherein the exhaust pipe of the compressor extends to the interior of the tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body. The method comprises: determining the discharge parameters of the fluid; based on the discharge parameters, determining at least two target outlets from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in pulsation amplitude by phase superposition; and controlling the fluid to be discharged through the at least two target outlets. Thus, a plurality of outlets can be provided on the exhaust pipe inside the tank body, and then at least two target outlets for controlling the discharge of the fluid can be determined from the exhaust pipe based on the discharge parameters of the fluid. In this way, the pulsation waves generated by the fluid discharged through the target outlets can be reduced in pulsation amplitude by phase superposition, and the method can be applied to the discharge parameters of a variety of different fluids, thereby reducing the fluid pulsation noise of the compressor within a wider frequency range.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a method and device for controlling compressor fluid pulsation. Background Art

[0002] In air conditioning equipment, pressure pulsation is caused by the periodic exhaust and intake of air by the compressor. The pulsation frequency is generally the compressor's rotational frequency (for single-cylinder rotors, scroll rotors) or a multiple thereof (for dual-cylinder rotors, etc.). This pulsation causes piping vibration and unit noise, such as the compressor's double-harmonic frequency transmission noise. Conventional technology typically addresses this transmission noise by adding a muffler to the exhaust pipe. However, due to the low frequency of double-harmonic frequency noise, typically between 100Hz and 200Hz, muffler selection is challenging and can only eliminate a narrow frequency range.

[0003] It can be seen that how to reduce the fluid pulsation noise of the compressor within a larger frequency range is a technical issue worthy of attention. Summary of the Invention

[0004] In view of this, in order to solve some or all of the above-mentioned technical problems, an embodiment of the present application provides a method and device for controlling compressor fluid pulsation.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling fluid pulsation in a compressor, wherein an exhaust pipe of the compressor extends into the interior of a tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge fluid compressed by the compressor. The method includes:

[0006] determining discharge parameters of the fluid;

[0007] Based on the discharge parameter, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0008] The control fluid is discharged through at least two target outlets.

[0009] In some possible implementations, determining the discharge parameters of the fluid includes:

[0010] Determine the operating frequency of the compressor, as well as the temperature and pressure of the discharge pipe;

[0011] Determine the exhaust pulsation frequency of the compressor based on the operating frequency;

[0012] Determine the wave velocity of the fluid based on temperature and pressure;

[0013] The exhaust pulsation frequency and wave speed are determined as the discharge parameters of the fluid.

[0014] In some possible implementations, determining at least two target outlets from a plurality of outlets based on the discharge parameter includes:

[0015] determining a first pipeline distance between any two outlets among the plurality of outlets, wherein the first pipeline distance represents a distance that the fluid flows from one outlet to another outlet;

[0016] Determine a first distance and a second distance from the determined multiple first pipeline distances, wherein the first distance is the first pipeline distance with the largest value among the determined multiple first pipeline distances, and the second distance is the first pipeline distance with the smallest value among the determined multiple first pipeline distances;

[0017] Determining a target distance based on the first distance, the second distance, and the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in amplitude by phase superposition;

[0018] At least two target exits are determined from the plurality of exits based on the target distance.

[0019] In some possible implementations, determining at least two target exits from a plurality of exits based on the target distance includes:

[0020] Determine a target outlet pair from the outlet pairs corresponding to the determined plurality of first pipeline distances in ascending order of the distances from the target outlet pair;

[0021] determining a phase difference between the target outlet and the discharged fluid;

[0022] determining whether the phase difference falls within a preset phase difference range;

[0023] When the phase difference falls within a preset phase difference interval, the two outlets in the outlet pair are respectively determined as target outlets.

[0024] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0025] Determine the exhaust pulsation frequency range, fluid wave velocity range, and target reduction amplitude;

[0026] determining, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, a third distance and a fourth distance between two outlets among the plurality of outlets, wherein the third distance is a maximum first pipe distance between the two outlets among the plurality of outlets, and the fourth distance is a minimum first pipe distance between the two outlets among the plurality of outlets, and the first pipe distance represents a distance that fluid flows from one outlet to another outlet;

[0027] Based on the third distance and the fourth distance, positions of a plurality of outlets on the exhaust pipe inside the tank are determined.

[0028] In some possible implementations, determining the third distance and the fourth distance between two outlets of the plurality of outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude includes:

[0029] Determining a first exhaust pulsation frequency with a minimum value and a second exhaust pulsation frequency with a maximum value from the exhaust pulsation frequency range;

[0030] From the wave speed interval, determine the first wave speed with the largest value and the second wave speed with the smallest value;

[0031] determining a third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude;

[0032] A fourth distance is determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0033] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0034] Determining a target operating frequency corresponding to the compressor operating noise to be reduced;

[0035] Based on the target operating frequency, positions of a plurality of outlets on an exhaust pipe inside the tank are determined.

[0036] In some possible implementations,

[0037] The first conduit distances between any two of the plurality of outlets are different, wherein the first conduit distance represents the distance that the fluid flows from one outlet to another outlet; and / or

[0038] The distance between the multiple outlets provided on the exhaust pipe inside the tank body is less than or equal to a preset distance threshold; and / or

[0039] The opening degree of the target outlet is positively correlated with the second pipeline distance corresponding to the target outlet, wherein the second pipeline distance represents the distance that the fluid flows from the compressor to the target outlet.

[0040] In a second aspect, an embodiment of the present application provides a device for controlling fluid pulsation in a compressor, wherein an exhaust pipe of the compressor extends into the interior of a tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge the fluid compressed by the compressor, and the device comprises:

[0041] a first determining unit configured to determine a discharge parameter of the fluid;

[0042] The second determining unit is configured to determine at least two target outlets from the plurality of outlets based on the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0043] A control unit is configured to control the discharge of the fluid through the at least two target outlets.

[0044] In some possible implementations, determining the discharge parameters of the fluid includes:

[0045] Determine the operating frequency of the compressor, as well as the temperature and pressure of the discharge pipe;

[0046] Determine the exhaust pulsation frequency of the compressor based on the operating frequency;

[0047] Determine the wave velocity of the fluid based on temperature and pressure;

[0048] The exhaust pulsation frequency and wave speed are determined as the discharge parameters of the fluid.

[0049] In some possible implementations, determining at least two target outlets from a plurality of outlets based on the discharge parameter includes:

[0050] determining a first pipeline distance between any two outlets among the plurality of outlets, wherein the first pipeline distance represents a distance that the fluid flows from one outlet to another outlet;

[0051] Determine a first distance and a second distance from the determined multiple first pipeline distances, wherein the first distance is the first pipeline distance with the largest value among the determined multiple first pipeline distances, and the second distance is the first pipeline distance with the smallest value among the determined multiple first pipeline distances;

[0052] Determining a target distance based on the first distance, the second distance, and the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in amplitude by phase superposition;

[0053] At least two target exits are determined from the plurality of exits based on the target distance.

[0054] In some possible implementations, determining at least two target exits from a plurality of exits based on the target distance includes:

[0055] Determine a target outlet pair from the outlet pairs corresponding to the determined plurality of first pipeline distances in ascending order of the distances from the target outlet pair;

[0056] determining a phase difference between the target outlet and the discharged fluid;

[0057] determining whether the phase difference falls within a preset phase difference range;

[0058] When the phase difference falls within a preset phase difference interval, the two outlets in the outlet pair are respectively determined as target outlets.

[0059] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0060] Determine the exhaust pulsation frequency range, fluid wave velocity range, and target reduction amplitude;

[0061] determining, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, a third distance and a fourth distance between two outlets among the plurality of outlets, wherein the third distance is a maximum first pipe distance between the two outlets among the plurality of outlets, and the fourth distance is a minimum first pipe distance between the two outlets among the plurality of outlets, and the first pipe distance represents a distance that fluid flows from one outlet to another outlet;

[0062] Based on the third distance and the fourth distance, positions of a plurality of outlets on the exhaust pipe inside the tank are determined.

[0063] In some possible implementations, determining the third distance and the fourth distance between two outlets of the plurality of outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude includes:

[0064] Determining a first exhaust pulsation frequency with a minimum value and a second exhaust pulsation frequency with a maximum value from the exhaust pulsation frequency range;

[0065] From the wave speed interval, determine the first wave speed with the largest value and the second wave speed with the smallest value;

[0066] determining a third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude;

[0067] A fourth distance is determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0068] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0069] Determining a target operating frequency corresponding to the compressor operating noise to be reduced;

[0070] Based on the target operating frequency, positions of a plurality of outlets on an exhaust pipe inside the tank are determined.

[0071] In some possible implementations,

[0072] The first conduit distances between any two of the plurality of outlets are different, wherein the first conduit distance represents the distance that the fluid flows from one outlet to another outlet; and / or

[0073] The distance between the multiple outlets provided on the exhaust pipe inside the tank body is less than or equal to a preset distance threshold; and / or

[0074] The opening degree of the target outlet is positively correlated with the second pipeline distance corresponding to the target outlet, wherein the second pipeline distance represents the distance that the fluid flows from the compressor to the target outlet.

[0075] In a third aspect, an embodiment of the present application provides an air conditioning device, comprising:

[0076] compressors, tanks, exhaust pipes, and treatment units;

[0077] The compressor is connected to the exhaust pipe;

[0078] The exhaust pipe extends to the interior of the tank;

[0079] The exhaust pipe located inside the tank body is provided with multiple outlets for discharging the fluid compressed by the compressor;

[0080] A processing unit is used to implement the method of any embodiment of the compressor fluid pulsation control method of the first aspect of the present application.

[0081] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method of any embodiment of the method for controlling compressor fluid pulsation of the first aspect described above is implemented.

[0082] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer-readable code. When the computer-readable code runs on a device, the processor in the device implements a method as in any embodiment of the method for controlling compressor fluid pulsation of the first aspect mentioned above.

[0083] The embodiment of the present application provides a method for controlling the pulsation of the fluid in the compressor, wherein the exhaust pipe of the compressor extends to the interior of the tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge the fluid compressed by the compressor. The above method can determine the discharge parameters of the fluid, and then, based on the discharge parameters, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in pulsation amplitude by phase superposition, and finally, the fluid is controlled to be discharged through the at least two target outlets. Thus, a plurality of outlets can be provided on the exhaust pipe inside the tank body, and then at least two target outlets for controlling the discharge of the fluid can be determined therefrom based on the discharge parameters of the fluid. In this way, the pulsation waves generated by the fluid discharged through the target outlets can be reduced in pulsation amplitude by phase superposition, and the method can be applied to the discharge parameters of a variety of different fluids, thereby reducing the fluid pulsation noise of the compressor within a larger frequency range. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0085] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0086] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0087] Figure 1 A flow chart of a method for controlling fluid pulsation in a compressor provided in an embodiment of the present application;

[0088] Figure 2 A flow chart of another method for controlling compressor fluid pulsation provided in an embodiment of the present application;

[0089] Figure 3 A schematic diagram of the principle of reducing pulsation amplitude in a method for controlling compressor fluid pulsation provided in an embodiment of the present application;

[0090] Figure 4 A schematic structural diagram of an air conditioning device provided in an embodiment of the present application;

[0091] Figure 5 A flow chart of another method for controlling compressor fluid pulsation provided in an embodiment of the present application;

[0092] Figure 6 A schematic structural diagram of a compressor fluid pulsation control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0093] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It is apparent that the described embodiments are only a portion of the embodiments of the present application, rather than all of the embodiments. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and numerical values ​​described in these embodiments do not limit the scope of the present application.

[0094] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present application are only used to distinguish between different steps, devices, modules and other objects, and neither represent any specific technical meaning nor indicate the logical order between them.

[0095] It should also be understood that in this embodiment, “a plurality of” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0096] It should also be understood that any component, data or structure mentioned in the embodiments of the present application can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0097] In addition, the term "and / or" in this application is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0098] It should also be understood that the description of each embodiment in this application focuses on the differences between the embodiments, and the same or similar aspects can be referenced with each other. For the sake of brevity, they will not be described one by one.

[0099] The following description of at least one exemplary embodiment is merely illustrative in nature and is not intended to limit the present disclosure, its application, or uses.

[0100] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the above-mentioned technologies, methods, and equipment should be considered part of the specification.

[0101] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0102] It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other. To facilitate understanding of the embodiments of this application, the application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0103] In order to solve the technical problem of how to reduce the fluid pulsation noise of the compressor within a larger frequency range in the prior art, the present application provides a method and device for controlling the fluid pulsation of the compressor. Multiple outlets can be set on the exhaust pipe inside the tank body, and then at least two target outlets for controlling the fluid discharge can be determined based on the discharge parameters of the fluid. In this way, the pulsation wave generated by the fluid discharged through the target outlet can be reduced by phase superposition, and the pulsation amplitude can be reduced. It can also be applicable to the discharge parameters of a variety of different fluids, thereby reducing the fluid pulsation noise of the compressor within a larger frequency range.

[0104] Figure 1 A flow chart of a method for controlling compressor fluid pulsation provided in an embodiment of the present application. This method can be applied to one or more electronic devices such as air conditioning equipment, a control unit of an air conditioning equipment, a control device for compressor fluid pulsation, a smart phone, a laptop computer, a desktop computer, a portable computer, a server, etc. In addition, the execution subject of this method can be hardware or software. When the above-mentioned execution subject is hardware, the execution subject can be one or more of the above-mentioned electronic devices. For example, a single electronic device can execute this method, or a plurality of electronic devices can cooperate with each other to execute this method. When the above-mentioned execution subject is software, this method can be implemented as multiple software or software modules, or as a single software or software module. No specific limitation is given here.

[0105] like Figure 4 As shown, the exhaust pipe 302 of the compressor 301 extends into the interior of the tank 303. Multiple outlets are provided on the exhaust pipe within the tank 303. These outlets are shown as outlets a, b, c, and d, and are used to discharge fluid compressed by the compressor. Furthermore, the fluid in the tank 303 can be discharged through the tank outlet pipe 304.

[0106] like Figure 1 As shown, the method specifically includes:

[0107] Step 101: Determine the discharge parameters of the fluid.

[0108] In this embodiment, the discharge parameters may be parameters related to the discharge of the fluid from the exhaust pipe, for example, the discharge parameters may include the temperature, pressure, and type of the fluid.

[0109] Step 102 : determining at least two target outlets from a plurality of outlets based on the discharge parameters, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition.

[0110] In this embodiment, various methods can be used to determine at least two target outlets from a plurality of outlets based on the discharge parameters.

[0111] As an example, a correspondence between the discharge parameter and at least two target outlets may be pre-established, whereby at least two target outlets may be determined from a plurality of outlets based on the discharge parameter through the correspondence.

[0112] In addition, other methods may be used to determine at least two target outlets from multiple outlets based on the discharge parameters. Please refer to the following description for details, which will not be elaborated here.

[0113] Here, see Figure 3 , Figure 3 A schematic diagram of the principle of reducing pulsation amplitude in a compressor fluid pulsation control method provided in an embodiment of the present application.

[0114] Here, the interference method of pulsation wave can solve the vibration and noise problems of the unit caused by exhaust pulsation. The basic principle is as follows Figure 3 As shown, the propagation path length L within the arc-shaped branch pipe is delayed by half a wavelength compared to the wave path L' within the main pipe. When the pulsating wave reaches the entrance of the arc-shaped branch pipe, it begins to diverge, propagating along the entire length of the branch pipe and the main pipe, respectively. Upon reaching the branch pipe outlet, the two flows converge, resulting in a 180-degree phase difference. Ideally, this ultimately results in a net pressure disturbance with no amplitude. Consequently, the pulsating waves generated by the fluids discharged from at least two target outlets are phase-superimposed, reducing the pulsation amplitude.

[0115] Step 103: Control the fluid to be discharged through at least two target outlets.

[0116] In this embodiment, after determining at least two target outlets, the at least two target outlets can be controlled to be in an open state, and the other outlets among the above-mentioned multiple outlets except the determined target outlets can be controlled to be in a closed state to control the discharge of fluid through the at least two target outlets.

[0117] Furthermore, the opening degrees of the target outlets in the open state may be the same or different.

[0118] In some optional implementations of this embodiment, the following methods may be used to determine the discharge parameters of the fluid:

[0119] The first step is to determine the operating frequency of the compressor, as well as the temperature and pressure of the discharge pipe.

[0120] The operating frequency of the compressor may be set by a user or other object, or may be obtained by detection by a frequency measuring instrument.

[0121] The temperature of the exhaust pipe can be detected by a temperature sensor provided in the exhaust pipe.

[0122] The pressure of the exhaust pipe can be detected via a pressure sensor provided in the exhaust pipe.

[0123] The second step is to determine the exhaust pulsation frequency of the compressor based on the operating frequency.

[0124] Here, for a compressor with a twin-cylinder rotor, the exhaust pulsation frequency may be twice the operating frequency. For a compressor with a single-cylinder rotor, the exhaust pulsation frequency may be the operating frequency.

[0125] The third step is to determine the wave velocity of the fluid based on temperature and pressure.

[0126] Here, the wave velocity of the fluid can be determined based on the temperature and pressure by looking up a table, or by using a formula based on the temperature and pressure.

[0127] The fourth step is to determine the exhaust pulsation frequency and wave speed as the discharge parameters of the fluid.

[0128] Here, after the exhaust pulsation frequency and wave speed are determined, the exhaust pulsation frequency and wave speed can be determined as the discharge parameters of the fluid.

[0129] It can be understood that in the above optional implementation method, the target outlet for controlling fluid discharge can be determined based on the exhaust pulsation frequency and wave velocity. In this way, the determined target outlet can be more closely matched with the current exhaust pulsation frequency and wave velocity, thereby further reducing the fluid pulsation noise of the compressor.

[0130] In some optional implementations of this embodiment, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0131] The first step is to determine the exhaust pulsation frequency range, the fluid wave velocity range and the target reduction amplitude.

[0132] The exhaust pulsation frequency interval can be a pre-set exhaust pulsation frequency range. During the operation of the compressor, multiple different pulsation frequencies can be generated. The exhaust pulsation frequency interval can cover all or part of the pulsation frequencies of the fluid discharged from the exhaust pipe of the compressor.

[0133] The velocity interval may be a pre-set velocity range. During operation of the compressor, the fluid may generate a plurality of different velocity ranges. The velocity interval may cover all or part of the velocity ranges of the fluid discharged from the exhaust pipe of the compressor.

[0134] The target reduction amplitude may be one or more preset expected reduction amplitudes. For example, the target reduction amplitude may be 1 / 2 of the amplitude before reduction.

[0135] In a second step, a third distance and a fourth distance between two outlets among the plurality of outlets are determined based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude.

[0136] The third distance is the largest first pipeline distance between two outlets among the multiple outlets, and the fourth distance is the smallest first pipeline distance between two outlets among the multiple outlets. The first pipeline distance represents the distance that the fluid flows from one outlet to another outlet.

[0137] Here, the third distance and the fourth distance between two outlets among the multiple outlets may be determined based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude through a preset correspondence table or formula.

[0138] The above correspondence table or formula may represent the correspondence between the exhaust pulsation frequency in the exhaust pulsation frequency interval, the wave speed in the wave speed interval, the target reduction amplitude, the third distance, and the fourth distance.

[0139] In some cases, the third distance may be the first distance described below, and the fourth distance may be the second distance described below.

[0140] The third step is to determine the positions of the plurality of outlets on the exhaust pipe inside the tank body based on the third distance and the fourth distance.

[0141] Here, after determining the third distance and the fourth distance, the positions of the multiple outlets on the exhaust pipe located inside the tank body can be determined accordingly, so that the minimum first pipe distance between two outlets among the multiple outlets is less than or equal to the above-mentioned third distance, and the maximum first pipe distance between two outlets among the multiple outlets is greater than or equal to the above-mentioned fourth distance; or, the first pipe distance between two outlets among the multiple outlets is distributed as much as possible (but not absolutely) between the third distance and the fourth distance.

[0142] It can be understood that in the above-mentioned optional implementation method, the third distance and the fourth distance between the outlets can be determined by the exhaust pulsation frequency range, the wave speed range and the target reduction amplitude. In this way, it can be better ensured that the pulsation amplitude reduced when the fluid is discharged from the outlet meets the expected target reduction amplitude, and the exhaust pulsation frequency range and the wave speed range are covered as much as possible, thereby further reducing the fluid pulsation noise of the compressor.

[0143] In some application scenarios of the above optional implementations, the following method can be used to determine the third distance and the fourth distance between two outlets among the multiple outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude:

[0144] In the first step, a first exhaust pulsation frequency with a minimum value and a second exhaust pulsation frequency with a maximum value are determined from the exhaust pulsation frequency range.

[0145] The first exhaust pulsation frequency is the exhaust pulsation frequency with the smallest value in the exhaust pulsation frequency range.

[0146] The second exhaust pulsation frequency is: the exhaust pulsation frequency with the largest value in the exhaust pulsation frequency range.

[0147] For example, if the exhaust pulsation frequency range is from 100 Hz to 240 Hz, then the first exhaust pulsation frequency is 100 Hz and the second exhaust pulsation frequency is 240 Hz.

[0148] The second step is to determine the first wave speed with the largest value and the second wave speed with the smallest value from the wave speed range.

[0149] Among them, the first wave speed is: the wave speed with the largest value in the wave speed range.

[0150] The second wave speed is: the wave speed with the smallest value in the wave speed range.

[0151] For example, if the wave speed interval is [a,b], then the first wave speed is b and the second wave speed is a.

[0152] In a third step, a third distance is determined based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude.

[0153] Here, we can first use the displacement expression for fluid vibrations described above to determine the phase corresponding to the target reduction amplitude. From this, we can determine the third distance using the first exhaust pulsation frequency, the first wave velocity, and the phase corresponding to the target reduction amplitude. For example, assuming the first wave velocity b = 200 m / s (meters per second) and the first exhaust pulsation frequency to be eliminated is 100 Hz, if the pulsation waves are superimposed to 1 / 2 their original amplitude (i.e., the target reduction amplitude), the theoretical minimum difference between the two paths is s = (151° / 360°) * (200 / 100) = 0.84 m. Therefore, the difference in distance between exits a and d from the bifurcation should not be less than 0.84 m. 0.84 m is the aforementioned third distance.

[0154] In the fourth step, a fourth distance is determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0155] Here, we can first use the displacement expression for fluid vibration to determine the phase corresponding to the target reduction amplitude. From this, we can determine the fourth distance based on the second exhaust pulsation frequency, the second wave velocity, and the phase corresponding to the target reduction amplitude. For example, assuming the second wave velocity a = 150 m / s and the second exhaust pulsation frequency to be eliminated is 240 Hz, and if the pulsation waves are superimposed to 1 / 2 their original amplitude (i.e., the target reduction amplitude), theoretically, the maximum distance between the two outlet locations, s2, = (151° / 360° + n) * (150 / 240) = 0.26 + 0.625n, where n can be 0, 1, etc. In this case, a non-zero positive integer is clearly incorrect, so n is set to 0. Exit b is located 0.26 m from either exit a or exit d. In this case, exit a is selected 0.26 m away. The 0.26 m distance represents the fourth distance described above.

[0156] It can be understood that in the above application scenario, the third distance can be determined based on the first exhaust pulsation frequency, the first wave velocity, and the target reduction amplitude, and the fourth distance can be determined based on the second exhaust pulsation frequency, the second wave velocity, and the target reduction amplitude. This allows for more accurate determination of the third and fourth distances between the two outlets, further reducing the fluid pulsation noise of the compressor.

[0157] In some optional implementations of this embodiment, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0158] The first step is to determine the target operating frequency corresponding to the compressor operating noise to be reduced.

[0159] Among them, different target operating frequencies may correspond to different operating noises.

[0160] The operating noise to be reduced may include at least one of the following: the operating noise with the highest frequency of occurrence, the operating noise with the loudest volume, etc.

[0161] In the second step, based on the target operating frequency, positions of multiple outlets on the exhaust pipe inside the tank are determined.

[0162] After the target operating frequency is determined, the positions of the outlets may be determined in a manner similar to that described above, so that the operating noise corresponding to the target operating frequency can be reduced when the fluid is discharged from the two outlets.

[0163] It can be understood that in the above optional implementation, the outlet position can be set more specifically for the more critical operating noise, thereby better reducing the operating noise corresponding to the critical operating frequency.

[0164] In some optional implementations of this embodiment, the first pipeline distances between any two of the multiple outlets are different.

[0165] The first pipeline distance represents the distance that the fluid flows from one outlet to another outlet.

[0166] It can be understood that in the above optional implementation, since the first pipe distances between the two outlets are different, the fluid pulsation noise of the compressor can be reduced within a larger frequency range.

[0167] In some optional implementations of this embodiment, the distance between the multiple outlets provided on the exhaust pipe located inside the tank body is less than or equal to a preset distance threshold.

[0168] It can be understood that in the above optional implementation, by arranging the positions of the multiple outlets as close as possible, the interference effect of the fluid discharged from the target outlet can be improved, thereby reducing the fluid pulsation noise of the compressor.

[0169] In some optional implementations of this embodiment, the opening degree of the target outlet is positively correlated with the distance of the second pipeline corresponding to the target outlet.

[0170] The second pipeline distance represents the distance the fluid flows from the compressor to the target outlet.

[0171] It can be understood that in the above-mentioned optional implementation method, the opening of the target outlet close to the compressor is greater than the opening of the target outlet far from the compressor. In this way, the flow rate of the fluid discharged from each target outlet can be closer, thereby improving the interference effect of the fluid discharged from the target outlet, and further reducing the fluid pulsation noise of the compressor.

[0172] It should be noted that, in the absence of conflict, the technical features recorded in different optional implementation methods may be included in the same embodiment. For the sake of brevity, they will not be repeated here.

[0173] The embodiment of the present application provides a method for controlling the pulsation of the fluid in the compressor, wherein the exhaust pipe of the compressor extends to the interior of the tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge the fluid compressed by the compressor. The above method can determine the discharge parameters of the fluid, and then, based on the discharge parameters, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in pulsation amplitude by phase superposition, and finally, the fluid is controlled to be discharged through the at least two target outlets. Thus, a plurality of outlets can be provided on the exhaust pipe inside the tank body, and then at least two target outlets for controlling the discharge of the fluid can be determined therefrom based on the discharge parameters of the fluid. In this way, the pulsation waves generated by the fluid discharged through the target outlets can be reduced in pulsation amplitude by phase superposition, and the method can be applied to the discharge parameters of a variety of different fluids, thereby reducing the fluid pulsation noise of the compressor within a larger frequency range.

[0174] Figure 2 A flow chart of another method for controlling compressor fluid pulsation provided in an embodiment of the present application.

[0175] like Figure 4 As shown, the exhaust pipe 302 of the compressor 301 extends into the interior of the tank 303. Multiple outlets are provided on the exhaust pipe within the tank 303. These outlets are shown as outlets a, b, c, and d, and are used to discharge fluid compressed by the compressor. Furthermore, the fluid in the tank 303 can be discharged through the tank outlet pipe 304.

[0176] like Figure 2 As shown, the method specifically includes:

[0177] Step 201: Determine the discharge parameters of the fluid.

[0178] In this embodiment, step 201 and Figure 1 Step 101 in the corresponding embodiment is basically the same and will not be described again here.

[0179] Step 202 : determining a first pipeline distance between any two outlets among a plurality of outlets, wherein the first pipeline distance represents a distance that a fluid flows from one outlet to another outlet.

[0180] In this embodiment, since the exhaust pipe located inside the tank is provided with multiple outlets, the position of each outlet is determined. For example, the third distance can be determined using the method described above and the third distance can be determined as the first distance here, and the fourth distance can be determined using the method described above and the fourth distance can be determined as the second distance here. Therefore, the first pipe distance between each of the multiple outlets can be determined here. For example, if the exhaust pipe inside the tank is provided with the following four outlets: outlet a, outlet b, outlet c, and outlet d. Then, the first pipe distance 1 between outlet a and outlet b, the first pipe distance 2 between outlet a and outlet c, the first pipe distance 3 between outlet a and outlet d, the first pipe distance 4 between outlet b and outlet c, the first pipe distance 5 between outlet b and outlet d, and the first pipe distance 6 between outlet c and outlet d can be determined respectively.

[0181] Step 203: Determine a first distance and a second distance from the multiple determined first pipeline distances, wherein the first distance is the first pipeline distance with the largest value among the multiple determined first pipeline distances, and the second distance is the first pipeline distance with the smallest value among the multiple determined first pipeline distances.

[0182] In this embodiment, after determining the first pipeline distances between each of the multiple outlets, the first distance and the second distance can be further determined from the determined first pipeline distances by comparing their values. For example, the first pipeline distance with the smallest value among first pipeline distance 1, first pipeline distance 2, first pipeline distance 3, first pipeline distance 4, first pipeline distance 5, and first pipeline distance 6 is determined as the second distance. The first pipeline distance with the largest value among first pipeline distance 1, first pipeline distance 2, first pipeline distance 3, first pipeline distance 4, first pipeline distance 5, and first pipeline distance 6 is determined as the first distance.

[0183] Step 204 : determining a target distance based on the first distance, the second distance, and the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in amplitude by phase superposition.

[0184] In this embodiment, the target distance may be determined based on the first distance, the second distance, and the discharge parameter using a preset table or formula.

[0185] The above table or formula represents the corresponding relationship between the first distance, the second distance, the discharge parameter and the target distance.

[0186] For example, if the exhaust parameters include the exhaust pulsation frequency 2f and the exhaust fluid wave velocity c, the target distance l can be determined as follows: (1 / 2 + n) * c / (2f), where n is an integer greater than or equal to 0. Therefore, by limiting the target distance to be greater than or equal to the second distance and less than or equal to the first distance, the value of n, and the range of possible target distance values, is determined.

[0187] Here, the number of target distances can be one or more. Each target distance can correspond to two exits, that is, an exit pair.

[0188] Step 205 : determining at least two target outlets from the plurality of outlets based on the target distance, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition.

[0189] In this embodiment, after the target difference distance is determined, two exits corresponding to each target distance among the multiple exits may be determined as target exits.

[0190] In step 206 , the fluid is controlled to be discharged through at least two target outlets.

[0191] In this embodiment, step 206 and Figure 1 Step 103 in the corresponding embodiment is basically the same and will not be described again here.

[0192] In some optional implementations of this embodiment, the following method may be used to determine at least two target exits from multiple exits based on the target distance:

[0193] In the first step, a target outlet pair is determined from the outlet pairs corresponding to the determined plurality of first pipeline distances in ascending order of the distance between the outlet pair and the target outlet.

[0194] Here, for each target distance, one or more target outlet pairs may be determined from the outlet pairs corresponding to the determined plurality of first pipeline distances.

[0195] The second step is to determine the phase difference between the target outlet and the discharged fluid.

[0196] The displacement expression of fluid vibration can be used to determine the phase corresponding to the target reduction amplitude of each target outlet, and then the phase difference between the fluids discharged from the two target outlets in the target outlet pair can be calculated.

[0197] The third step is to determine whether the phase difference belongs to the preset phase difference range.

[0198] The preset phase difference interval may be a pre-set phase difference interval.

[0199] In the fourth step, when the phase difference falls within the preset phase difference range, the two exits in the exit pair are respectively determined as target exits.

[0200] It can be understood that in the above optional implementation, by preferentially selecting the target outlet pair having a smaller gap with the target distance, the fluid pulsation noise of the compressor can be more effectively reduced.

[0201] It should be noted that, in addition to the above contents, this embodiment may also include Figure 1 The corresponding technical features described in the corresponding embodiments are realized Figure 1 For details on the technical effects of the compressor fluid pulsation control method, please refer to Figure 1 For the sake of brevity, the relevant description will not be repeated here.

[0202] The compressor fluid pulsation control method provided in the embodiment of the present application determines the target outlet through the target distance, which can improve the effect of reducing the pulsation amplitude and further more effectively reduce the fluid pulsation noise of the compressor.

[0203] The following is an illustrative description of the embodiments of the present application, but it should be noted that the following content is only used to understand the technical solutions of the embodiments of the present application and does not constitute a limitation on the scope of protection of the embodiments of the present application.

[0204] In air conditioning equipment, pressure pulsation is caused by the periodic exhaust and intake of air by the compressor. The pulsation frequency is generally the compressor's rotational frequency (for single-cylinder rotors, scroll rotors) or a multiple thereof (for dual-cylinder rotors, etc.). This pulsation causes piping vibration and unit noise, such as the compressor's double-harmonic frequency transmission noise. Conventional technology typically addresses this transmission noise by adding a muffler to the exhaust pipe. However, due to the low frequency of double-harmonic frequency noise, typically between 100Hz and 200Hz, muffler selection is difficult and can only eliminate a narrow frequency range.

[0205] This solution uses the interference method of pulse waves to solve the vibration and noise problems of the unit caused by exhaust pulsation. The basic principle is as follows Figure 3 As shown, the propagation path length L within the arc-shaped branch pipe is delayed by half a wavelength compared to the wave path L' within the main pipe. When the pulsating wave reaches the inlet of the arc-shaped branch pipe, it begins to split, propagating separately along the entire length of the branch pipe and in the main pipe. Upon reaching the branch pipe outlet, the two flows converge, resulting in a 180-degree phase difference. In theory, under ideal conditions, this ultimately results in a net pressure perturbation with no amplitude.

[0206] Since the compressor is variable frequency and has a wide operating frequency, directly using this structure cannot meet the needs of the unit. If branches are added to the exhaust pipe, it will undoubtedly cause more stress problems, so certain improvements are needed.

[0207] See below Figure 5 Detailed introduction of this program:

[0208] (1) Determine the design length of the pipeline inside the tank, that is, the first distance and the third distance mentioned above. First, confirm the lowest pulsation frequency that needs to be eliminated (that is, the first exhaust pulsation frequency) and the maximum exhaust wave velocity (that is, the first wave velocity) and the minimum amplitude of the pulsation required at this frequency (that is, the target reduction amplitude mentioned above); taking a twin-cylinder rotor compressor as an example, under all working conditions, the exhaust pulsation wave velocity fluctuates between [a, b]. Assuming the maximum wave velocity b = 200m / s, to eliminate the pulsation frequency of 100Hz to 240Hz, if the pulsation wave is superimposed to 1 / 2 times the original amplitude, theoretically, the minimum difference between the two paths is s = (151° / 360°) * (200 / 100) = 0.84m, then the distance difference between outlet a and outlet d from the bifurcation should not be less than 0.84m.

[0209] In practice, different reduction amplitudes can be set at different frequencies, for example, reducing the amplitude to 1 / 2 of the original at 50 Hz and reducing it to 1 / 3 of the original at 100 Hz.

[0210] In some cases, an exit may be provided at the location of the fork.

[0211] The 151° calculated above is the minimum phase difference between the two waves. This can be roughly thought of as the superposition of two sine waves. The difference in phase determines the change in amplitude after superposition. For example, if the phase difference is 0 degrees, the amplitude after superposition is doubled, while if the phase difference is 180 degrees, the amplitude after superposition is zero. In this example, the amplitude after superposition is required to be halved, so the calculated phase difference is 151°.

[0212] Assume that two sine waves with the same frequency and amplitude are:

[0213]

[0214]

[0215] The amplitude after superposition is:

[0216]

[0217] Let R=A / 2, and we get .

[0218] Where t represents time, A represents amplitude, and ω represents angular frequency. Indicates the initial phase of the fluid discharged from an outlet, Indicates the initial phase of the fluid discharged from the other outlet.

[0219] (2) Determine the minimum outlet position distance, which is also the second distance and the fourth distance mentioned above. First, confirm the highest pulsation frequency that needs to be eliminated (that is, the second exhaust pulsation frequency) and the minimum exhaust wave speed (that is, the second wave speed) and the minimum amplitude of the pulsation required at this frequency (that is, the target reduction amplitude). Taking a twin-cylinder rotor compressor as an example, under all operating conditions, the exhaust pulsation wave speed fluctuates between [a, b]. Assuming the maximum wave speed b = 150m / s, to eliminate the pulsation frequency of 100Hz to 240Hz, if the pulsation waves are superimposed to 1 / 2 times the original amplitude, theoretically, the minimum distance between the two outlet positions s2 = (151° / 360°+n)*(150 / 240) = 0.26+0.625n, where n can be 0, 1, ... n represents the number of wavelengths. During the interference process of the two waves, the first wave of wave a can interfere with the first wave of wave b, or with the second wave or the third wave. In this case, when n is a non-zero positive integer, it is obviously incorrect, so n is taken as 0, and Exit B is selected to be 0.26m away from Exit A or Exit D. In this case, Exit A is selected to be 0.26m away.

[0220] (3) Determine the location of other outlets: In this solution, the location of other outlets is set between b and d. The following are the steps: 1) consider the critical frequency (i.e., the target operating frequency) that may be problematic under certain operating conditions as much as possible, so that the pulsation amplitude after superposition of this frequency is close to 0; 2) make the position differences between different outlets as different as possible, so that the position differences of the entire pipeline are distributed as evenly as possible. In this solution, the fourth outlet c can be set to 0.72m from the first outlet a. The path differences that exist through different combinations are: 0.12, 0.26, 0.46, 0.58, 0.72, and 0.84, which can cover all the required frequencies.

[0221] (4) Supplementary explanation: According to the needs, at least 2 outlets should be set. The location of each outlet can be made as close as possible by changing the direction of the pipeline. This scheme sets 4 outlets as follows Figure 4 At the same time, the opening of each outlet needs to be controlled to avoid the front outlet opening being too large, which will cause the flow rate of the rear outlet to be too small.

[0222] (5) Method of controlling the switch:

[0223] like Figure 5 As shown: First, the exhaust pulsation frequency f is obtained. For a two-cylinder rotor compressor, the pulsation frequency is twice the compressor speed (2f). Second, the exhaust pipe pressure and temperature are obtained, based on which the exhaust pulsation wave velocity c is calculated. Because the actual wave velocity fluctuates, the optimal outlet needs to be calculated.

[0224] Among them, the gas temperature at any position in the exhaust pipe will not fluctuate greatly because the exhaust pipe is short.

[0225] Calculate the optimal path difference (i.e., the target distance mentioned above) l = (1 / 2 + n) * c / (2f), select two design exit position differences s1 and s2 that are close to the path difference l (if n has 2 values, calculate 4 position differences, and so on), where s1 ≥ l, s2 ≤ l, calculate the absolute value of the difference between the phase difference at this position and 180°, and take the smaller value. If it is less than 29°, it means that the theoretical value of the pulsation amplitude after superposition is less than half of the original value. If it is less than 60°, it means that the superposition amplitude is less than the original amplitude but greater than half of the original amplitude. If it is ≥ 60°, it means that the current opening scheme has no beneficial effect at this frequency after superposition, and only one opening is required, or the exit position is redesigned.

[0226] It should be noted that, in addition to the contents recorded above, this embodiment may also include the technical features described in the above embodiments, thereby achieving the technical effects of the compressor fluid pulsation control method shown above. Please refer to the above description for details. For the sake of brevity, it will not be elaborated here.

[0227] The control method for compressor fluid pulsation provided in the embodiment of the present application can reduce the pulsation shock that causes pipeline vibration and unit noise of the air conditioning unit, as well as the pulsation shock of different frequencies caused by the compressor. By reducing the pipeline pulsation shock, the pipeline vibration and unit noise can be reduced. By utilizing the phase interference principle of the pulsation wave, different outlets are set in the pipeline part of the exhaust pipe in the tank body, and the distances between the outlets are different, so the pulsation wave phases of the compressor exhaust pulsation wave going out from different outlets are different. These waves are mixed in the tank body, and the pressure in the tank body is more uniform and then discharged. By controlling the opening and closing of the outlet through the control switch, the outlet position and outlet resistance of the sub-pulsation wave are changed, so as to adapt to the shock waves caused by different working conditions (exhaust pressure temperature and frequency differences) to the greatest extent possible.

[0228] Figure 6 This is a schematic diagram of the structure of a compressor fluid pulsation control device provided in an embodiment of the present application. The exhaust pipe of the compressor extends into the interior of the tank. The exhaust pipe located inside the tank is provided with multiple outlets for discharging the fluid compressed by the compressor. Specifically, it includes:

[0229] A first determining unit 401 is configured to determine a discharge parameter of the fluid;

[0230] The second determining unit 402 is configured to determine at least two target outlets from the plurality of outlets based on the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0231] The control unit 403 is configured to control the discharge of the fluid through at least two target outlets.

[0232] In some possible implementations, determining the discharge parameters of the fluid includes:

[0233] Determine the operating frequency of the compressor, as well as the temperature and pressure of the discharge pipe;

[0234] Determine the exhaust pulsation frequency of the compressor based on the operating frequency;

[0235] Determine the wave velocity of the fluid based on temperature and pressure;

[0236] The exhaust pulsation frequency and wave speed are determined as the discharge parameters of the fluid.

[0237] In some possible implementations, determining at least two target outlets from a plurality of outlets based on the discharge parameter includes:

[0238] determining a first pipeline distance between any two outlets among the plurality of outlets, wherein the first pipeline distance represents a distance that the fluid flows from one outlet to another outlet;

[0239] Determine a first distance and a second distance from the determined multiple first pipeline distances, wherein the first distance is the first pipeline distance with the largest value among the determined multiple first pipeline distances, and the second distance is the first pipeline distance with the smallest value among the determined multiple first pipeline distances;

[0240] Determining a target distance based on the first distance, the second distance, and the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in amplitude by phase superposition;

[0241] At least two target exits are determined from the plurality of exits based on the target distance.

[0242] In some possible implementations, determining at least two target exits from a plurality of exits based on the target distance includes:

[0243] Determine a target outlet pair from the outlet pairs corresponding to the determined plurality of first pipeline distances in ascending order of the distances from the target outlet pair;

[0244] determining a phase difference between the target outlet and the discharged fluid;

[0245] determining whether the phase difference falls within a preset phase difference range;

[0246] When the phase difference falls within a preset phase difference interval, the two outlets in the outlet pair are respectively determined as target outlets.

[0247] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0248] Determine the exhaust pulsation frequency range, fluid wave velocity range, and target reduction amplitude;

[0249] determining, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, a third distance and a fourth distance between two outlets among the plurality of outlets, wherein the third distance is a maximum first pipe distance between the two outlets among the plurality of outlets, and the fourth distance is a minimum first pipe distance between the two outlets among the plurality of outlets, and the first pipe distance represents a distance that fluid flows from one outlet to another outlet;

[0250] Based on the third distance and the fourth distance, positions of a plurality of outlets on the exhaust pipe inside the tank are determined.

[0251] In some possible implementations, determining a third distance and a fourth distance between two outlets of the plurality of outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude includes:

[0252] Determining a first exhaust pulsation frequency with a minimum value and a second exhaust pulsation frequency with a maximum value from the exhaust pulsation frequency range;

[0253] From the wave speed interval, determine the first wave speed with the largest value and the second wave speed with the smallest value;

[0254] determining a third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude;

[0255] A fourth distance is determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0256] In some possible implementations, the positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows:

[0257] Determining a target operating frequency corresponding to the compressor operating noise to be reduced;

[0258] Based on the target operating frequency, positions of a plurality of outlets on an exhaust pipe inside the tank are determined.

[0259] In some possible implementations,

[0260] The first conduit distances between any two of the plurality of outlets are different, wherein the first conduit distance represents the distance that the fluid flows from one outlet to another outlet; and / or

[0261] The distance between the multiple outlets provided on the exhaust pipe inside the tank body is less than or equal to a preset distance threshold; and / or

[0262] The opening degree of the target outlet is positively correlated with the second pipeline distance corresponding to the target outlet, wherein the second pipeline distance represents the distance that the fluid flows from the compressor to the target outlet.

[0263] The compressor fluid pulsation control device provided in this embodiment can be as follows Figure 6 The compressor fluid pulsation control device shown in can execute all the steps of the compressor fluid pulsation control method described above, thereby achieving the technical effects of the compressor fluid pulsation control method described above. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0264] The embodiment of the present application also provides an air conditioning device. Figure 4 , air conditioning equipment includes:

[0265] Compressor 301, tank 303, exhaust pipe 302 and processing unit (not shown);

[0266] The compressor 301 is connected to the exhaust pipe 302;

[0267] The exhaust pipe 302 extends to the interior of the tank 303;

[0268] The exhaust pipe 302 located inside the tank 303 is provided with multiple outlets for discharging the fluid compressed by the compressor, including outlet a, outlet b, outlet c, and outlet d, for a total of four outlets.

[0269] A processing unit, configured to implement any of the above-mentioned compressor fluid pulsation control methods of the present application, for example, includes:

[0270] determining discharge parameters of the fluid;

[0271] Based on the discharge parameter, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0272] The control fluid is discharged through at least two target outlets.

[0273] The methods disclosed in the above embodiments of the present application can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the processor or by software instructions. The above processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software units in the decoding processor. The software units can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in a memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0274] It is understood that the embodiments described herein may be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, or other electronic units or combinations thereof for performing the above-mentioned functions of the present application.

[0275] For software implementation, the techniques described above can be implemented by a unit that performs the functions described above. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0276] The air conditioning equipment provided in this embodiment can be an air conditioning equipment as shown in the figure, which can execute all steps of the control method of the fluid pulsation of each compressor described above, and thus achieve the technical effect of the control method of the fluid pulsation of each compressor described above. Please refer to the above related description for details. For the sake of simplicity, it will not be repeated here.

[0277] The present application also provides a storage medium (computer-readable storage medium). The storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, a hard disk, or a solid-state drive; or a combination of the aforementioned types of memory.

[0278] When one or more programs in the storage medium can be executed by one or more processors, the above-mentioned method for controlling the fluid pulsation of the compressor executed on the electronic device side can be implemented.

[0279] The processor is used to execute the fluid pulsation control program stored in the memory to implement the following steps of the compressor fluid pulsation control method executed on the electronic device side:

[0280] determining discharge parameters of the fluid;

[0281] Based on the discharge parameter, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0282] The control fluid is discharged through at least two target outlets.

[0283] In addition, the computer program product provided in the embodiments of the present application may include computer-readable code. When the computer-readable code is executed on a device, the processor in the device implements the following steps of the method for controlling compressor fluid pulsation executed on the electronic device side:

[0284] determining discharge parameters of the fluid;

[0285] Based on the discharge parameter, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition;

[0286] The control fluid is discharged through at least two target outlets.

[0287] Professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0288] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0289] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0290] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for controlling fluid pulsation in a compressor, characterized in that: The exhaust pipe of the compressor extends to the interior of the tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge the fluid compressed by the compressor. The method includes: determining a discharge parameter of the fluid; Based on the discharge parameter, at least two target outlets are determined from the plurality of outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition using a pulsation wave interference method; controlling the fluid to be discharged through at least two target outlets; The determining of the discharge parameter of the fluid comprises: determining the operating frequency of the compressor, and the temperature and pressure of the exhaust pipe; determining an exhaust pulsation frequency of the compressor based on the operating frequency; determining a wave velocity of the fluid based on the temperature and the pressure; The exhaust pulsation frequency and the wave speed are determined as the discharge parameters of the fluid.

2. The method according to claim 1, characterized in that The step of determining at least two target outlets from the plurality of outlets based on the discharge parameter comprises: determining a first pipeline distance between any two of the plurality of outlets, wherein the first pipeline distance represents a distance the fluid flows from one outlet to another outlet; Determining a first distance and a second distance from the determined plurality of first pipeline distances, wherein the first distance is the first pipeline distance with the largest value among the determined plurality of first pipeline distances, and the second distance is the first pipeline distance with the smallest value among the determined plurality of first pipeline distances; Determining a target distance based on the first distance, the second distance, and the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in amplitude by phase superposition; At least two target exits are determined from the plurality of exits based on the target distance.

3. The method according to claim 2, characterized in that The step of determining at least two target exits from the plurality of exits based on the target distance includes: Determine a target outlet pair from the outlet pairs corresponding to the determined plurality of first pipeline distances in ascending order of the difference between the outlet pair and the target distance; determining a phase difference between the target outlet and the discharge of the fluid; determining whether the phase difference falls within a preset phase difference interval; When the phase difference falls within the preset phase difference interval, the two outlets in the target outlet pair are respectively determined as target outlets.

4. The method according to any one of claims 1 to 3, characterized in that The positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows: determining an exhaust pulsation frequency range, a wave velocity range of the fluid, and a target reduction amplitude; determining, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, a third distance and a fourth distance between two outlets among the plurality of outlets, wherein the third distance is a maximum first pipe distance between the two outlets among the plurality of outlets, and the fourth distance is a minimum first pipe distance between the two outlets among the plurality of outlets, the first pipe distance representing a distance that fluid flows from one outlet to another outlet; Based on the third distance and the fourth distance, positions of a plurality of outlets on the exhaust pipe inside the tank are determined.

5. The method according to claim 4, characterized in that The determining, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, a third distance and a fourth distance between two outlets of the plurality of outlets includes: Determining a first exhaust pulsation frequency with a minimum value and a second exhaust pulsation frequency with a maximum value from the exhaust pulsation frequency range; Determining a first wave speed with a maximum value and a second wave speed with a minimum value from the wave speed interval; determining a third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude; A fourth distance is determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

6. The method according to any one of claims 1 to 3, characterized in that The positions of the multiple outlets on the exhaust pipe inside the tank are determined as follows: determining a target operating frequency corresponding to the operating noise of the compressor to be reduced; Based on the target operating frequency, positions of a plurality of outlets on the exhaust pipe inside the tank are determined.

7. The method according to any one of claims 1 to 3, characterized in that The first pipeline distances between any two of the plurality of outlets are different, wherein the first pipeline distance represents the distance the fluid flows from one outlet to another outlet; and / or The distance between the multiple outlets provided on the exhaust pipe inside the tank body is less than or equal to a preset distance threshold; and / or The opening degree of the target outlet is positively correlated with the second pipeline distance corresponding to the target outlet, wherein the second pipeline distance represents the distance that the fluid flows from the compressor to the target outlet.

8. A compressor fluid pulsation control device, characterized in that: The exhaust pipe of the compressor extends to the interior of the tank body, and a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the plurality of outlets are used to discharge the fluid compressed by the compressor. The device includes: a first determining unit configured to determine a discharge parameter of the fluid; a second determining unit configured to determine at least two target outlets from the plurality of outlets based on the discharge parameter, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets are reduced in amplitude by phase superposition; A control unit is configured to control the fluid to be discharged through at least two target outlets.

9. An air conditioning device, characterized in that: include: compressors, tanks, exhaust pipes, and treatment units; The compressor is connected to the exhaust pipe; The exhaust pipe extends to the interior of the tank; The exhaust pipe located inside the tank body is provided with a plurality of outlets, and the plurality of outlets are used to discharge the fluid compressed by the compressor; The processing unit is used to implement the compressor fluid pulsation control method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for controlling the fluid pulsation of the compressor according to any one of claims 1 to 7 is implemented.

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