Compressor fluid pulsation control method and device

Abstract

The embodiment of the invention relates to a method and device for controlling fluid pulsation of a compressor, an exhaust pipe of the compressor extends into a tank body, a plurality of outlets are formed in the exhaust pipe located in the tank body, and the method comprises the steps that discharge parameters of fluid are determined; based on the discharge parameters, at least two target outlets are determined from the multiple outlets, and pulsating amplitude of pulsating waves generated by the fluid discharged by the at least two target outlets is reduced through phase superposition; the control fluid is discharged through at least two target outlets. Therefore, a plurality of outlets can be formed in the exhaust pipe in the tank body, and at least two target outlets for controlling fluid discharge are determined based on the discharge parameters of the fluid, so that the pulsating amplitude of pulsating waves generated by the fluid discharged through the target outlets can be reduced through phase superposition, and the pulsating effect of the fluid is improved. And moreover, the compressor can be suitable for discharge parameters of various different fluids, so that the fluid pulsation noise of the compressor can be reduced in a larger frequency range.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and particularly 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 suction of the compressor. Its pulsation frequency is generally the rotation frequency of the compressor (single-cylinder rotor, scroll) or double frequency (double-cylinder rotor, etc.). The pulsation causes pipeline vibration and unit noise problems, such as the double-frequency transmitted sound of the compressor. In the related art, the problem of transmitted sound is generally solved by adding a muffler to the exhaust pipe. However, due to the relatively low double-frequency noise frequency, generally between 100 Hz (Hertz) and 200 Hz, it is difficult to select a muffler, and only a small frequency range can be eliminated.

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

[0004] In view of this, to solve the above-mentioned part or all of the technical problems, the embodiments of this application provide a method and device for controlling compressor fluid pulsation.

[0005] In a first aspect, the embodiments of this application provide a method for controlling compressor fluid pulsation. The exhaust pipe of the compressor extends into the tank body, and a plurality of outlets are arranged on the exhaust pipe located inside the tank body. The plurality of outlets are used to discharge the fluid compressed by the compressor. The method includes: Determine the discharge parameters of the fluid; Based on the discharge parameters, determine at least two target outlets from the plurality of outlets. Among them, the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are superimposed in phase to reduce the pulsation amplitude; Control the fluid to be discharged through at least two target outlets.

[0006] In some possible implementation manners, determining the discharge parameters of the fluid includes: Determine the operating frequency of the compressor, as well as the temperature and pressure of the exhaust pipe; Based on the operating frequency, determine the exhaust pulsation frequency of the compressor; Based on the temperature and pressure, determine the wave speed of the fluid; Determine the exhaust pulsation frequency and the wave speed as the discharge parameters of the fluid.

[0007] In some possible implementation manners, based on the discharge parameters, determining at least two target outlets from the plurality of outlets includes: Determine the first pipeline distance between every two outlets among the plurality of outlets, where the first pipeline distance represents the distance that the fluid flows from one outlet to another outlet; From the determined multiple first pipe distances, determine a first distance and a second distance, where the first distance is the largest first pipe distance among the determined multiple first pipe distances, and the second distance is the smallest first pipe distance among the determined multiple first pipe distances; Based on the first distance, the second distance, and the discharge parameter, determine a target distance, where the pulsation amplitudes of the fluids discharged from the two outlets corresponding to the target distance are reduced by phase superposition; Based on the target distance, determine at least two target outlets from the multiple outlets.

[0008] In some possible implementation manners, determining at least two target outlets from the multiple outlets based on the target distance includes: Determine a target outlet pair from the outlet pairs corresponding to the determined multiple first pipe distances in ascending order of the gap from the target distance; Determine the phase difference of the fluids discharged from the target outlet pair; Determine whether the phase difference belongs to a preset phase difference interval; In the case where the phase difference belongs to the preset phase difference interval, determine the two outlets in the outlet pair as the target outlets respectively.

[0009] In some possible implementation manners, the positions of the multiple outlets on the exhaust pipe inside the tank are determined by the following method: Determine an exhaust pulsation frequency interval, a wave speed interval of the fluid, and a target reduction amplitude; Based on the exhaust pulsation frequency interval, the wave speed interval, and the target reduction amplitude, determine a third distance and a fourth distance between two outlets among the multiple outlets, where the third distance is the largest first pipe distance between two outlets among the multiple outlets, and the fourth distance is the smallest first pipe distance between two outlets among the multiple outlets, and the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; Based on the third distance and the fourth distance, determine the positions of the multiple outlets on the exhaust pipe inside the tank.

[0010] In some possible implementation manners, determining the third distance and the fourth distance between two outlets among the multiple outlets based on the exhaust pulsation frequency interval, the wave speed interval, and the target reduction amplitude includes: Determine a first exhaust pulsation frequency with the smallest value and a second exhaust pulsation frequency with the largest value from the exhaust pulsation frequency interval; Determine a first wave speed with the largest value and a second wave speed with the smallest value from the wave speed interval; Based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude, determine the third distance; Determine a fourth distance based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0011] In some possible implementation manners, the positions of multiple outlets on the exhaust pipe located inside the tank are determined by the following method: Determine the target operating frequency corresponding to the operating noise to be reduced by the compressor; Based on the target operating frequency, determine the positions of multiple outlets on the exhaust pipe located inside the tank.

[0012] In some possible implementation manners, The first pipe distances between every two of the multiple outlets are different, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; and / or The distance between multiple outlets provided on the exhaust pipe located inside the tank 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 pipe distance corresponding to the target outlet, where the second pipe distance represents the distance that the fluid flows from the compressor to the target outlet.

[0013] In a second aspect, an embodiment of the present application provides a control device for compressor fluid pulsation. The exhaust pipe of the compressor extends into the tank, and multiple outlets are provided on the exhaust pipe located inside the tank. The multiple outlets are used to discharge the fluid compressed by the compressor. The device includes: A first determination unit configured to determine the discharge parameters of the fluid; A second determination unit configured to determine at least two target outlets from the multiple outlets based on the discharge parameters, where the pulsation waves generated by the fluids discharged from the at least two target outlets respectively reduce the pulsation amplitude through phase superposition; A control unit configured to control the fluid to be discharged through the at least two target outlets.

[0014] In some possible implementation manners, determining the discharge parameters of the fluid includes: Determine the operating frequency of the compressor, as well as the temperature and pressure of the exhaust pipe; Based on the operating frequency, determine the exhaust pulsation frequency of the compressor; Based on the temperature and pressure, determine the wave speed of the fluid; Determine the exhaust pulsation frequency and the wave speed as the discharge parameters of the fluid.

[0015] In some possible implementation manners, determining at least two target outlets from the multiple outlets based on the discharge parameters includes: Determine the first pipe distances between every two of the multiple outlets, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; From the determined multiple first pipeline distances, determine a first distance and a second distance, where 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; Based on the first distance, the second distance, and the discharge parameter, determine a target distance, where the pulsation amplitudes of the fluids discharged from the two outlets corresponding to the target distance are reduced by phase superposition; Based on the target distance, determine at least two target outlets from the multiple outlets.

[0016] In some possible implementation manners, determining at least two target outlets from the multiple outlets based on the target distance includes: Determine a target outlet pair from the outlet pairs corresponding to the determined multiple first pipeline distances in ascending order of the gap from the target distance; Determine the phase difference of the fluids discharged from the target outlet pair; Determine whether the phase difference belongs to a preset phase difference interval; In the case where the phase difference belongs to the preset phase difference interval, determine the two outlets in the outlet pair as the target outlets respectively.

[0017] In some possible implementation manners, the positions of the multiple outlets on the exhaust pipe located inside the tank are determined by the following method: Determine the exhaust pulsation frequency interval, the wave speed interval of the fluid, and the target reduction amplitude; Based on the exhaust pulsation frequency interval, the wave speed interval, and the target reduction amplitude, determine a third distance and a fourth distance between two outlets among the multiple outlets, where 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, and the first pipeline distance represents the distance that the fluid flows from one outlet to another outlet; Based on the third distance and the fourth distance, determine the positions of the multiple outlets on the exhaust pipe located inside the tank.

[0018] In some possible implementation manners, determining the third distance and the fourth distance between two outlets among the multiple outlets based on the exhaust pulsation frequency interval, the wave speed interval, and the target reduction amplitude includes: From the exhaust pulsation frequency interval, determine the smallest first exhaust pulsation frequency and the largest second exhaust pulsation frequency; From the wave speed interval, determine the largest first wave speed and the smallest second wave speed; Based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude, determine the third distance; Based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude, determine the fourth distance.

[0019] In some possible embodiments, the positions of multiple outlets on the exhaust pipe located inside the tank are determined in the following manner: Determine the target operating frequency corresponding to the operating noise to be reduced by the compressor; Based on the target operating frequency, determine the positions of multiple outlets on the exhaust pipe located inside the tank.

[0020] In some possible embodiments, The first pipe distances between any two of the multiple outlets are different, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; and / or The distance between multiple outlets provided on the exhaust pipe located inside the tank 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 pipe distance corresponding to the target outlet, where the second pipe distance represents the distance that the fluid flows from the compressor to the target outlet.

[0021] In a third aspect, an embodiment of the present application provides an air conditioning device, including: A compressor, a tank, an exhaust pipe, and a processing unit; The compressor is connected to the exhaust pipe; The exhaust pipe extends into the tank; Multiple outlets are provided on the exhaust pipe located inside the tank, and the multiple outlets are used to discharge the fluid compressed by the compressor; The processing unit is configured to implement the method of any one of the embodiments of the method for controlling the fluid pulsation of the compressor in the first aspect of the present application.

[0022] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method of any one of the embodiments of the method for controlling the fluid pulsation of the compressor in the first aspect as described above is implemented.

[0023] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes computer-readable code. When the computer-readable code runs on a device, the processor in the device is caused to implement the method of any one of the embodiments of the method for controlling the fluid pulsation of the compressor in the first aspect as described above.

[0024] The control method for compressor fluid pulsation provided by the embodiments of the present application, wherein the exhaust pipe of the compressor extends into the interior of the tank, and a plurality of outlets are provided on the exhaust pipe located inside the tank. 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. Then, based on the discharge parameters, at least two target outlets are determined from the plurality of outlets. Among them, the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are superimposed in phase to reduce the pulsation amplitude. 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, and then at least two target outlets for controlling the discharge of the fluid are determined 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 superimposed in phase to reduce the pulsation amplitude, and it can be applied to the discharge parameters of a variety of different fluids, so that the fluid pulsation noise of the compressor can be reduced in a larger frequency range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0027] One or more embodiments are illustrated by way of example in the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a scale limitation.

[0028] Figure 1 It is a schematic flowchart of a control method for compressor fluid pulsation provided by the embodiments of the present application; Figure 2 It is a schematic flowchart of another control method for compressor fluid pulsation provided by the embodiments of the present application; Figure 3 It is a schematic diagram of the principle of reducing the pulsation amplitude in a control method for compressor fluid pulsation provided by the embodiments of the present application; Figure 4 It is a schematic structural diagram of an air conditioning device provided by the embodiments of the present application; Figure 5 It is a schematic flowchart of yet another control method for compressor fluid pulsation provided by the embodiments of the present application; Figure 6Schematic structural diagram of a control device for compressor fluid pulsation provided by an embodiment of the present application. Detailed implementation manners

[0029] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present application, rather than all of them. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present application.

[0030] Those skilled in the art can understand that terms such as "first" and "second" in the embodiments of the present application are only used to distinguish different steps, devices, or modules, etc., without representing any specific technical meaning and without indicating the logical order between them.

[0031] It should also be understood that in this embodiment, "a plurality of" may refer to two or more, and "at least one" may refer to one, two, or more.

[0032] It should also be understood that for any component, data, or structure mentioned in the embodiments of the present application, without clear definition or contrary indication in the context, it can generally be understood as one or more.

[0033] In addition, the term "and / or" in the present application is only a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0034] It should also be understood that the description of each embodiment of the present application emphasizes the differences between the embodiments, and their similarities can be referred to each other. For the sake of brevity, they will not be elaborated one by one.

[0035] The following description of at least one exemplary embodiment is actually only illustrative and does not constitute any limitation to the present application and its application or use.

[0036] For technologies, methods, and devices known to those of ordinary skill in the relevant art, detailed discussions may not be made, but in appropriate cases, the above technologies, methods, and devices should be regarded as part of the specification.

[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. To facilitate the understanding of the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the scope of protection of the present application.

[0039] To solve the technical problem of how to reduce the fluid pulsation noise of a compressor in a larger frequency range in the prior art, the present application provides a method and a device for controlling the fluid pulsation of a compressor. 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 fluid discharge can be determined based on the discharge parameters of the fluid. In this way, the pulsation waves generated by the fluid discharged through the target outlets can reduce the pulsation amplitude through phase superposition, and it can be applicable to the discharge parameters of a variety of different fluids, so that the fluid pulsation noise of the compressor can be reduced in a larger frequency range.

[0040] Figure 1 It is a schematic flowchart of a method for controlling the fluid pulsation of a compressor provided by 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 air conditioning equipment, a device for controlling the fluid pulsation of a compressor, a smart phone, a notebook 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 execution subject is hardware, the execution subject can be one or more of the above electronic devices. For example, a single electronic device can execute this method, or multiple electronic devices can cooperate with each other to execute this method. When the above execution subject is software, this method can be implemented as multiple software or software modules, or can be implemented as a single software or software module. No specific limitation is made here.

[0041] As Figure 4 shown, the exhaust pipe 302 of the compressor 301 extends into the tank body 303, and a plurality of outlets are provided on the exhaust pipe located inside the tank body 303. The figure shows an a outlet, a b outlet, a c outlet, and a d outlet, and the plurality of outlets are used to discharge the fluid compressed by the compressor. In addition, the fluid in the tank body 303 can be discharged through the tank body exhaust pipe 304.

[0042] As Figure 1 shown, the method specifically includes: Step 101, determine the discharge parameters of the fluid.

[0043] In this embodiment, the discharge parameter may be a relevant parameter when the fluid is discharged in the exhaust pipe. For example, the discharge parameter may include the temperature, pressure, fluid type, etc. of the fluid.

[0044] Step 102, based on the discharge parameter, determine at least two target outlets from multiple outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are reduced in pulsation amplitude through phase superposition.

[0045] In this embodiment, various methods may be adopted to determine at least two target outlets from multiple outlets based on the discharge parameter.

[0046] As an example, a correspondence relationship between the discharge parameter and at least two target outlets may be established in advance. Thus, based on the discharge parameter, at least two target outlets can be determined from multiple outlets through the above correspondence relationship.

[0047] In addition, other methods may also be adopted to determine at least two target outlets from multiple outlets based on the discharge parameter. For specific details, please refer to the following description and will not be elaborated here.

[0048] Here, please refer to Figure 3 , Figure 3 which is a schematic diagram of the principle of reducing the pulsation amplitude in a method for controlling the fluid pulsation of a compressor provided in an embodiment of the present application.

[0049] Here, by using the interference method of pulsation waves, the problems of unit vibration and noise caused by exhaust pulsation can be solved. The basic principle is as Figure 3 shown: The propagation path length L in the circular arc-shaped side branch pipe is half a wavelength delayed compared to the wave path L' in the main pipe therebetween. When the pulsation wave reaches the entrance of the circular arc-shaped side branch pipe, it starts to split and propagates respectively in the entire branch pipe length and the main pipe. When reaching the outlet of the branch pipe, the two-way fluids converge, thus forming a 180-degree phase difference. Thus, ideally, a pressure net disturbance with no amplitude can be finally synthesized. Thus, the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are reduced in pulsation amplitude through phase superposition.

[0050] Step 103, control the fluid to be discharged through at least two target outlets.

[0051] In this embodiment, after determining at least two target outlets, it is possible to control the determined at least two target outlets to be in an open state, and control the other outlets among the above multiple outlets, except for the determined respective target outlets, to be in a closed state, so as to control the fluid to be discharged through at least two target outlets.

[0052] In addition, the opening degrees of the respective target outlets in the open state may be the same or different.

[0053] In some alternative implementation manners of this embodiment, the following method can be adopted to determine the discharge parameters of the fluid: In the first step, determine the operating frequency of the compressor, as well as the temperature and pressure of the exhaust pipe.

[0054] Among them, the operating frequency of the compressor can be set by an object such as a user, or obtained by detection using a frequency measuring instrument.

[0055] The temperature of the exhaust pipe can be detected by a temperature sensor disposed in the exhaust pipe.

[0056] The pressure of the exhaust pipe can be detected by a pressure sensor disposed in the exhaust pipe.

[0057] In the second step, based on the operating frequency, determine the exhaust pulsation frequency of the compressor.

[0058] Here, for a compressor with a double-cylinder rotor, its exhaust pulsation frequency can be twice the operating frequency. For a compressor with a single-cylinder rotor, its exhaust pulsation frequency can be the operating frequency.

[0059] In the third step, based on the temperature and pressure, determine the wave speed of the fluid.

[0060] Here, the wave speed of the fluid can be determined based on the temperature and pressure by looking up a table. Alternatively, the wave speed of the fluid can also be determined based on the temperature and pressure by using a formula.

[0061] In the fourth step, determine the exhaust pulsation frequency and the wave speed as the discharge parameters of the fluid.

[0062] Here, after determining the exhaust pulsation frequency and the wave speed, the exhaust pulsation frequency and the wave speed can be determined as the discharge parameters of the fluid.

[0063] It can be understood that in the above alternative implementation manners, the target outlet for controlling the fluid discharge can be determined based on the exhaust pulsation frequency and the wave speed. In this way, the determined target outlet can be more matched with the current exhaust pulsation frequency and wave speed, and further, the fluid pulsation noise of the compressor can be further reduced.

[0064] In some alternative implementation manners of this embodiment, the positions of multiple outlets on the exhaust pipe located inside the tank are determined by the following method: In the first step, determine the exhaust pulsation frequency range, the wave speed range of the fluid, and the target reduction amplitude.

[0065] The exhaust pulsation frequency range can be a preset exhaust pulsation frequency range. During the operation of the compressor, multiple different pulsation frequencies can be generated. This exhaust pulsation frequency range can cover all or part of the pulsation frequencies of the fluid discharged from the exhaust pipe of the compressor.

[0066] The wave speed range can be a pre-set wave speed scope. During the operation of the compressor, the fluid can generate multiple different wave speeds. This wave speed range can cover all or part of the wave speeds of the fluid discharged from the exhaust pipe of the compressor.

[0067] The target reduction amplitude can be one or more pre-set amplitudes to be expected to be reduced. As an example, the target reduction amplitude can be 1 / 2 of the amplitude before reduction.

[0068] In the second step, based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude, determine the third distance and the fourth distance between two outlets among multiple outlets.

[0069] Among them, the third distance is the maximum first pipe distance between two outlets among multiple outlets, and the fourth distance is the minimum first pipe distance between two outlets among multiple outlets. The first pipe distance represents the distance that the fluid flows from one outlet to another outlet.

[0070] Here, the third distance and the fourth distance between two outlets among multiple outlets can be determined based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude by presetting a corresponding relationship table or formula.

[0071] Among them, the above-mentioned corresponding relationship table or formula can represent the corresponding relationship among the exhaust pulsation frequency in the exhaust pulsation frequency range, the wave speed in the wave speed range, the target reduction amplitude, the third distance, and the fourth distance.

[0072] In some cases, the above-mentioned third distance can be the first distance described later, and the above-mentioned fourth distance can be the second distance described later.

[0073] In the third step, based on the third distance and the fourth distance, determine the positions of multiple outlets on the exhaust pipe located inside the tank body.

[0074] Here, after determining the third distance and the fourth distance, the positions of 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 multiple outlets is less than or equal to the above-mentioned third distance, and the maximum first pipe distance between two outlets among multiple outlets is greater than or equal to the above-mentioned fourth distance; or, make the first pipe distances between two outlets among multiple outlets be distributed as much as possible (rather than absolutely) between the third distance and the fourth distance.

[0075] It can be understood that in the above optional implementation manners, the third distance and the fourth distance between the outlets can be determined through 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 outlets conforms to the expected target reduction amplitude, and as much as possible, the exhaust pulsation frequency range and the wave speed range are covered. Thus, the fluid pulsation noise of the compressor can be further reduced.

[0076] In some application scenarios of the above optional implementation manners, the following method can be adopted to determine the third distance and the fourth distance between two outlets among multiple outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude: The first step is to determine the first exhaust pulsation frequency with the minimum value and the second exhaust pulsation frequency with the maximum value from the exhaust pulsation frequency range.

[0077] Among them, the first exhaust pulsation frequency is the exhaust pulsation frequency with the minimum value in the exhaust pulsation frequency range.

[0078] The second exhaust pulsation frequency is the exhaust pulsation frequency with the maximum value in the exhaust pulsation frequency range.

[0079] 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.

[0080] The second step is to determine the first wave speed with the maximum value and the second wave speed with the minimum value from the wave speed range.

[0081] Among them, the first wave speed is the wave speed with the maximum value in the wave speed range.

[0082] The second wave speed is the wave speed with the minimum value in the wave speed range.

[0083] For example, if the wave speed range is [a, b], then the first wave speed is b, and the second wave speed is a.

[0084] The third step is to determine the third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude.

[0085] Here, the displacement expression of the above fluid vibration can be first used to determine the phase corresponding to the target reduction amplitude. Thus, the third distance can be determined by the first exhaust pulsation frequency, the first wave speed, and the phase corresponding to the target reduction amplitude. For example, assuming the first wave speed b = 200 m / s (meters per second), the first exhaust pulsation frequency to be eliminated is 100 Hz. If the pulsation wave is superimposed to 1 / 2 times the original amplitude (i.e., the target reduction amplitude), theoretically, the minimum path difference s = (151° / 360°) * (200 / 100) = 0.84 m. Then, the distance difference between the a outlet and the d outlet from the bifurcation should not be less than 0.84 m (meters). Among them, 0.84 m is the above-mentioned third distance.

[0086] In the fourth step, based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude, determine the fourth distance.

[0087] Here, the displacement expression of the above fluid vibration can be first used to determine the phase corresponding to the target reduction amplitude. Thus, the fourth distance can be determined based on the second exhaust pulsation frequency, the second wave speed, and the phase corresponding to the target reduction amplitude. For example, assuming the second wave speed a = 150 m / s, the second exhaust pulsation frequency to be eliminated is 240 Hz. If the pulsation wave is superimposed to 1 / 2 times the original amplitude (i.e., the target reduction amplitude), theoretically, the maximum distance between the two outlet positions s2 = (151° / 360° + n) * (150 / 240) = 0.26 + 0.625n, where n can take 0, 1,.... In this case, when n takes a non-zero positive integer, it is obviously incorrect. Therefore, n takes 0, and the b outlet is selected at a position 0.26 m from the a outlet or the d outlet. In this case, it is selected at a position 0.26 m from the a outlet. Among them, 0.26 m is the above-mentioned fourth distance.

[0088] 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 speed, and the target reduction amplitude, and the fourth distance can be determined based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude. Thus, the third distance and the fourth distance between the two outlets can be determined more accurately, so that the fluid pulsation noise of the compressor can be further reduced.

[0089] In some alternative implementation manners of this embodiment, the positions of multiple outlets on the exhaust pipe located inside the tank are determined by the following method: In the first step, determine the target operating frequency corresponding to the operating noise to be reduced by the compressor.

[0090] Among them, different target operating frequencies can correspond to different operating noises.

[0091] The above-mentioned operating noise to be reduced may include at least one of the following: the operating noise with the highest occurrence frequency, the operating noise with the largest loudness, etc.

[0092] Step 2: Based on the target operating frequency, determine the positions of multiple outlets on the exhaust pipe inside the tank body.

[0093] After determining the target operating frequency, a similar method as above can be adopted to determine the positions of the outlets, so that the operating noise corresponding to the target operating frequency can be reduced when the fluid is discharged from the two outlets.

[0094] It can be understood that in the above optional implementation manners, for relatively critical operating noise, the outlet positions can be set more specifically, so that the operating noise corresponding to the critical operating frequency can be better reduced.

[0095] In some optional implementation manners of this embodiment, the first pipe distances between every two of the multiple outlets are different.

[0096] Wherein, the first pipe distance represents the distance that the fluid flows from one outlet to another outlet.

[0097] It can be understood that in the above optional implementation manners, since the first pipe distances between every two outlets are different, the fluid pulsation noise of the compressor can be reduced in a larger frequency range.

[0098] In some optional implementation manners of this embodiment, the distances between the multiple outlets provided on the exhaust pipe inside the tank body are less than or equal to a preset distance threshold.

[0099] It can be understood that in the above optional implementation manners, 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, and thus the fluid pulsation noise of the compressor can be reduced.

[0100] In some optional implementation manners of this embodiment, the opening degree of the target outlet is positively correlated with the second pipe distance corresponding to the target outlet.

[0101] Wherein, the second pipe distance represents the distance that the fluid flows from the compressor to the target outlet.

[0102] It can be understood that in the above optional implementation manners, the opening degree of the target outlet closer to the compressor is larger than that of the target outlet farther from the compressor. In this way, the flow rates of the fluid discharged from each target outlet can be made closer, so as to improve the interference effect of the fluid discharged from the target outlet, and further reduce the fluid pulsation noise of the compressor.

[0103] It should be noted that, without conflict, the technical features recorded in different optional implementation manners can be included in the same embodiment. For the sake of concise description, they are not elaborated here.

[0104] The control method for compressor fluid pulsation provided by the embodiments of the present application, wherein the exhaust pipe of the compressor extends into the interior of the tank body, and a plurality of outlets are arranged on the exhaust pipe located inside the tank body. 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. Then, based on the discharge parameters, at least two target outlets are determined from the plurality of outlets. Among them, the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are superimposed in phase to reduce the pulsation amplitude. Finally, the fluid is controlled to be discharged through the at least two target outlets. Thus, a plurality of outlets can be arranged on the exhaust pipe inside the tank body, and then at least two target outlets for controlling the fluid discharge are 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 superimposed in phase to reduce the pulsation amplitude, and it can be applied to the discharge parameters of a variety of different fluids, so that the fluid pulsation noise of the compressor can be reduced in a larger frequency range.

[0105] Figure 2 It is a schematic flow chart of another control method for compressor fluid pulsation provided by the embodiments of the present application.

[0106] As Figure 4 shown, the exhaust pipe 302 of the compressor 301 extends into the interior of the tank body 303, and a plurality of outlets are arranged on the exhaust pipe located inside the tank body 303. The figure shows an a outlet, a b outlet, a c outlet and a d outlet, and the plurality of outlets are used to discharge the fluid compressed by the compressor. In addition, the fluid in the tank body 303 can be discharged through the tank body outlet pipe 304.

[0107] As Figure 2 shown, the method specifically includes: Step 201, determine the discharge parameters of the fluid.

[0108] In this embodiment, step 201 is basically the same as Figure 1 step 101 in the corresponding embodiment, and will not be elaborated here.

[0109] Step 202, determine the first pipe distance between every two outlets among the plurality of outlets, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet.

[0110] In this embodiment, since a plurality of outlets are provided on the exhaust pipe located inside the tank body, and the positions of the respective outlets are determined. For example, the third distance can be determined in the manner described above, and the third distance is determined as the first distance here, and the fourth distance is determined in the manner described above, and the fourth distance is determined as the second distance here. Therefore, the first pipe distances between any two of the plurality of outlets can be determined here. For example, if there are the following 4 outlets on the exhaust pipe inside the tank body: 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.

[0111] Step 203: Determine the first distance and the second distance from the determined plurality of first pipe distances, where the first distance is the first pipe distance with the largest value among the determined plurality of first pipe distances, and the second distance is the first pipe distance with the smallest value among the determined plurality of first pipe distances.

[0112] In this embodiment, when determining the first pipe distances between any two of the plurality of outlets, the first distance and the second distance can be further determined from the determined plurality of first pipe distances by comparing their magnitudes. For example, among the first pipe distance 1, the first pipe distance 2, the first pipe distance 3, the first pipe distance 4, the first pipe distance 5, and the first pipe distance 6, the first pipe distance with the smallest value is determined as the second distance. Among the first pipe distance 1, the first pipe distance 2, the first pipe distance 3, the first pipe distance 4, the first pipe distance 5, and the first pipe distance 6, the first pipe distance with the largest value is determined as the first distance.

[0113] Step 204: Determine the target distance based on the first distance, the second distance, and the discharge parameter, where the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are superimposed in phase to reduce the pulsation amplitude.

[0114] In this embodiment, the target distance can be determined based on the first distance, the second distance, and the discharge parameter through a preset table or formula.

[0115] Wherein, the above table or formula represents the corresponding relationship between the first distance, the second distance, the discharge parameter, and the target distance.

[0116] As an example, if the discharge parameter includes the exhaust pulsation frequency 2f and the wave speed c of the discharged fluid, then the target distance l = (1 / 2 + n) * c / (2f) can be determined in the following manner. Here, n is an integer greater than or equal to 0. Thus, by restricting 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 is determined, as well as the distance values that the target distance can take.

[0117] Here, the number of target distances can be one or more. Each target distance can correspond to two outlets, that is, an outlet pair.

[0118] Step 205: Based on the target distance, determine at least two target outlets from multiple outlets, where the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are reduced in pulsation amplitude through phase superposition.

[0119] In this embodiment, after determining the target difference distance, the two outlets corresponding to each target distance among the multiple outlets can be determined as the target outlets.

[0120] Step 206: Control the fluid to be discharged through at least two target outlets.

[0121] In this embodiment, Step 206 is substantially the same as Figure 1 Step 103 in the corresponding embodiment, and will not be elaborated here.

[0122] In some alternative implementation manners of this embodiment, the following method can be used to determine at least two target outlets from multiple outlets based on the target distance: The first step: Determine the target outlet pair from the outlet pairs corresponding to the determined multiple first pipeline distances in ascending order of the gap from the target distance.

[0123] Here, for each target distance, one or more target outlet pairs can be determined from the outlet pairs corresponding to the determined multiple first pipeline distances.

[0124] The second step: Determine the phase difference of the fluids discharged from the target outlet pair.

[0125] Among them, the phase corresponding to the target reduced amplitude of each target outlet can be determined first by using the displacement expression of fluid vibration. Then, the phase difference of the fluids discharged from the two target outlets in the target outlet pair is calculated.

[0126] The third step: Determine whether the phase difference belongs to a preset phase difference interval.

[0127] Among them, the above preset phase difference interval can be a preset phase difference interval.

[0128] In the fourth step, when the phase difference belongs to a preset phase difference range, the two outlets in the outlet alignment are respectively determined as target outlets.

[0129] It can be understood that in the above optional implementation manners, by preferentially selecting a pair of target outlets with a smaller gap from the target distance, the fluid pulsation noise of the compressor can be more effectively reduced.

[0130] It should be noted that in addition to the above-recorded content, this embodiment may further include Figure 1 the corresponding technical features described in the corresponding embodiments, so as to achieve Figure 1 the technical effects of the control method for the fluid pulsation of the compressor shown, for details, please refer to Figure 1 the relevant descriptions. For the sake of brief description, they will not be elaborated here.

[0131] The control method for the fluid pulsation of the compressor provided by the embodiment of the present application can determine the target outlet through the target distance, which can improve the effect of reducing the pulsation amplitude, and thus can more effectively reduce the fluid pulsation noise of the compressor.

[0132] Next, the embodiments of the present application will be described exemplarily. However, 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 protection scope of the embodiments of the present application.

[0133] In an air conditioning device, the pressure pulsation is caused by the periodic exhaust and suction of the compressor. Its pulsation frequency is generally the rotation frequency of the compressor (single-cylinder rotor, scroll) or the multiple frequency (double-cylinder rotor, etc.). The pulsation causes pipeline vibration and unit noise problems, such as the double-frequency transmitted sound of the compressor. In the related art, generally, the problem of transmitted sound is solved by adding a muffler to the exhaust pipe. However, due to the relatively low double-frequency noise frequency, generally between 100 Hz and 200 Hz, it is difficult to select a muffler, and only a small frequency range can be eliminated.

[0134] This solution uses the interference method of pulsation waves to solve the problems of unit vibration and noise caused by exhaust pulsation. The basic principle is as Figure 3 shown: The propagation path length L in the arc-shaped side branch pipe has a half-wavelength delay compared to the path L' of the wave in the main pipe between them. When the pulsation wave reaches the entrance of the arc-shaped side branch pipe, it starts to split and propagates in the entire branch pipe length and the main pipe respectively. When it reaches the outlet of the branch pipe, the two-way fluids converge, thus forming a 180-degree phase difference. Theoretically, ideally, a pressure net disturbance with no amplitude can be finally synthesized.

[0135] Since the compressor is frequency-variable and has a wide operating frequency range, directly using this structure cannot meet the requirements of the unit. Moreover, if branches are added to the exhaust pipe, it will undoubtedly cause more stress problems. Therefore, certain improvements are needed.

[0136] Refer to the following Figure 5 for a detailed introduction to this solution: (1) Determine the designed length of the pipeline inside the tank, which is also the above-mentioned first distance and third distance. First, confirm the lowest pulsation frequency to be eliminated (i.e., the above-mentioned first exhaust pulsation frequency), the maximum exhaust wave speed (i.e., the above-mentioned first wave speed), and the minimum pulsation reduction amplitude required at this frequency (i.e., the above-mentioned target reduction amplitude); taking a certain double-cylinder rotary compressor as an example, under all working conditions, the exhaust pulsation wave speed fluctuates between [a, b]. Assuming the maximum wave speed b = 200 m / s, to eliminate the pulsation frequencies from 100 Hz to 240 Hz, if the pulsation wave is to be superimposed to 1 / 2 of the original amplitude, theoretically, the minimum path difference s = (151° / 360°) * (200 / 100) = 0.84 m, then the distance difference between the a outlet and the d outlet from the bifurcation should not be less than 0.84 m.

[0137] In practice, different reduction amplitudes can be set at different frequencies. For example, it is reduced to 1 / 2 of the original amplitude at 50 Hz and to 1 / 3 of the original at 100 Hz.

[0138] In some cases, an outlet can be set at the position of the bifurcation.

[0139] The above 151° is the minimum phase difference between two columns of waves calculated, which can be approximately regarded as the superposition of two sine waves. The degree of phase difference determines the change in the amplitude after superposition; for example, if the phase difference is 0°, the amplitude after superposition is 2 times, and if the phase difference is 180°, the amplitude after superposition is 0. In this example, it is required that the amplitude after superposition is 1 / 2 of the original, so the calculated phase difference is 151°.

[0140] Let two sine waves with the same frequency and amplitude be respectively:

[0141]

[0142] The amplitude after superposition is:

[0143] Let R = A / 2, and the calculation gives .

[0144] where t represents time, A represents amplitude, ω represents angular frequency, represents the initial phase of the fluid discharged from one outlet, represents the initial phase of the fluid discharged from the other outlet.

[0145] (2) Determine the minimum outlet position distance, which is the second distance and the fourth distance mentioned above. First, confirm the highest pulsation frequency (that is, the second exhaust pulsation frequency) and the minimum exhaust wave speed (that is, the second wave speed) that need to be eliminated, as well as the minimum amplitude of pulsation reduction 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 speed fluctuates between [a, b]. Assuming that the maximum wave speed b = 150m / 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 distance between the two outlet positions s2 = (151° / 360°+n)*(150 / 240) = 0.26+0.625n, n can be 0, 1, ... n represents the number of wavelengths. In the interference process of 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 0.26 m away from Exit A or Exit D. In this case, Exit A is selected to be 0.26 m away.

[0146] (3) Determine the positions of other outlets: In this solution, the positions of other outlets are set between b and d. The positions are set as follows: ① Consider the critical frequency (i.e., the target operating frequency) that has problems under certain working 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 be 0.72m away from the first outlet a. Then, the path differences that exist through different combinations are: 0.12, 0.26, 0.46, 0.58, 0.72, 0.84, which can cover all the required frequencies.

[0147] (4) Additional 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, resulting in too small a flow rate at the rear outlet.

[0148] (5) Method of controlling the switch: like Figure 5 As shown: First, obtain the exhaust pulsation frequency f. For a two-cylinder rotor compressor, the pulsation frequency is twice the compressor speed (2f); second, obtain the pressure and temperature of the exhaust pipe, and on this basis obtain the exhaust pulsation wave speed c. Since the actual wave speed fluctuates, it is necessary to calculate the optimal outlet.

[0149] Among them, the gas temperature at any position in the exhaust pipe will not fluctuate greatly at different positions in the pipe because the exhaust pipe is short.

[0150] Calculate the optimal path difference (i.e., the above-mentioned target distance) \(l=(1 / 2 + n)\times c / (2f)\), and select two design outlet 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 \(s1\geq l\) and \(s2\leq l\). Calculate the absolute value of the difference between the phase difference at this position and \(180^{\circ}\), and take the smaller value. If it is less than \(29^{\circ}\), 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 \(60^{\circ}\), it means that the amplitude after superposition is less than the original amplitude but greater than half of the original value. If \(\geq60^{\circ}\), it means that the current opening scheme has no beneficial effect after superposition at this frequency, and only one opening can be made or the outlet position can be redesigned.

[0151] It should be noted that, in addition to the above-mentioned content, this embodiment may also include the technical features described in the above embodiments, so as to achieve the technical effects of the above-mentioned compressor fluid pulsation control method. For specific reference, please refer to the above description. For the sake of concise description, it will not be elaborated here.

[0152] The compressor fluid pulsation control method provided by the embodiments of the present application can reduce the pulsation impact that causes the pipeline vibration and unit noise of the air conditioning unit, as well as the pulsation impacts of different frequencies caused by the compressor. By reducing the pipeline pulsation impact, the pipeline vibration and unit noise can be reduced. Utilizing the principle of phase interference of pulsation waves, by setting different outlets for the pipeline part of the exhaust pipe in the tank, and the distances between the outlets are different, so there are differences in the phases of the pulsation waves of the compressor exhaust pulsation waves exiting from different outlets. These waves are mixed in the tank, and the pressure in the tank is more uniform and then discharged. By controlling the switch to control the opening and closing of the outlets, the outlet positions and outlet resistances of the sub-pulsation waves are changed, so as to adapt to the shock waves caused by different working conditions (exhaust pressure, temperature, and frequency differences) as much as possible.

[0153] Figure 6 It is a schematic structural diagram of a compressor fluid pulsation control device provided by the embodiments of the present application. The exhaust pipe of the compressor extends into the interior of the tank, and a plurality of outlets are provided on the exhaust pipe located inside the tank. The plurality of outlets are used to discharge the fluid compressed by the compressor. Specifically, it includes: The first determination unit 401 is configured to determine the discharge parameters of the fluid; The second determination unit 402 is configured to determine at least two target outlets from the plurality of outlets based on the discharge parameters, wherein the pulsation waves generated by the fluid discharged from the at least two target outlets respectively reduce the pulsation amplitude through phase superposition; The control unit 403 is configured to control the fluid to be discharged through the at least two target outlets.

[0154] In some possible embodiments, determining the discharge parameters of the fluid includes: Determining the operating frequency of the compressor, as well as the temperature and pressure of the exhaust pipe; Based on the operating frequency, determining the exhaust pulsation frequency of the compressor; Based on the temperature and pressure, determining the wave speed of the fluid; Determining the exhaust pulsation frequency and the wave speed as the discharge parameters of the fluid.

[0155] In some possible embodiments, based on the discharge parameters, determining at least two target outlets from multiple outlets includes: Determining the first pipe distance between every two outlets among the multiple outlets, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; Determining a first distance and a second distance from the determined multiple first pipe distances, where the first distance is the largest first pipe distance among the determined multiple first pipe distances, and the second distance is the smallest first pipe distance among the determined multiple first pipe distances; Based on the first distance, the second distance, and the discharge parameters, determining a target distance, where the pulsation waves generated by the fluids discharged from the two outlets corresponding to the target distance are reduced in pulsation amplitude through phase superposition; Based on the target distance, determining at least two target outlets from the multiple outlets.

[0156] In some possible embodiments, based on the target distance, determining at least two target outlets from multiple outlets includes: Determining target outlet pairs from the outlet pairs corresponding to the determined multiple first pipe distances in ascending order of the gap from the target distance; Determining the phase difference of the fluids discharged from the target outlet pairs; Determining whether the phase difference belongs to a preset phase difference interval; In the case where the phase difference belongs to the preset phase difference interval, determining the two outlets in the outlet pair as the target outlets respectively.

[0157] In some possible embodiments, the positions of multiple outlets on the exhaust pipe located inside the tank are determined by the following method: Determining the exhaust pulsation frequency interval, the wave speed interval of the fluid, and the target reduction amplitude; Based on the exhaust pulsation frequency interval, the wave speed interval, and the target reduction amplitude, determining a third distance and a fourth distance between two outlets among the multiple outlets, where the third distance is the largest first pipe distance between two outlets among the multiple outlets, and the fourth distance is the smallest first pipe distance between two outlets among the multiple outlets, and the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; Determine the positions of a plurality of outlets on the exhaust pipe located inside the tank based on the third distance and the fourth distance.

[0158] In some possible implementation manners, determining the third distance and the fourth distance between two outlets among the plurality of outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude includes: Determine the first exhaust pulsation frequency with the minimum value and the second exhaust pulsation frequency with the maximum value from the exhaust pulsation frequency range; Determine the first wave speed with the maximum value and the second wave speed with the minimum value from the wave speed range; Determine the third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude; Determine the fourth distance based on the second exhaust pulsation frequency, the second wave speed, and the target reduction amplitude.

[0159] In some possible implementation manners, the positions of a plurality of outlets on the exhaust pipe located inside the tank are determined by the following method: Determine the target operating frequency corresponding to the operating noise to be reduced by the compressor; Based on the target operating frequency, determine the positions of a plurality of outlets on the exhaust pipe located inside the tank.

[0160] In some possible implementation manners, The first pipe distances between two outlets among the plurality of outlets are different, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; and / or The distance between a plurality of outlets provided on the exhaust pipe located inside the tank 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 pipe distance corresponding to the target outlet, where the second pipe distance represents the distance that the fluid flows from the compressor to the target outlet.

[0161] The compressor fluid pulsation control device provided in this embodiment may be the compressor fluid pulsation control device as shown in Figure 6 It can execute all the steps of the above-mentioned compressor fluid pulsation control methods, and further achieve the technical effects of the above-mentioned compressor fluid pulsation control methods. For specific reference, please refer to the above relevant descriptions. For the sake of concise description, it will not be elaborated here.

[0162] The present application embodiment also provides an air conditioning device. Refer to Figure 4 , the air conditioning device includes: A compressor 301, a tank 303, an exhaust pipe 302, and a processing unit (not shown in the figure); The compressor 301 is connected to the exhaust pipe 302; The exhaust pipe 302 extends into the interior of the tank body 303; A plurality of outlets are provided on the exhaust pipe 302 located inside the tank body 303, and the plurality of outlets are used to discharge the fluid compressed by the compressor. The illustration includes outlet a, outlet b, outlet c, and outlet d, a total of 4 outlets.

[0163] A processing unit is used to implement the method of any one of the embodiments of the method for controlling the fluid pulsation of the compressor in the present application, for example, including: Determine the discharge parameters of the fluid; Based on the discharge parameters, determine 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 respectively are superimposed in phase to reduce the pulsation amplitude; Control the fluid to be discharged through at least two target outlets.

[0164] The method disclosed in the embodiments of the present application above 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, the steps of the above method can be completed by the integrated logic circuit in the hardware of the processor or by instructions in the form of software. 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, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed by the hardware decoding processor or by a combination of the hardware and software units in the decoding processor. The software unit may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0165] It can be understood that the embodiments described herein can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can 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, other electronic units for performing the above functions of the present application, or a combination thereof.

[0166] For software implementation, the above-described technology herein can be implemented by units that execute the above functions herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented inside or outside the processor.

[0167] The air conditioning device provided in this embodiment can be the air conditioning device shown in [reference], and can execute all steps of the control method for the fluid pulsation of each compressor described above, thereby achieving the technical effects of the control method for the fluid pulsation of each compressor described above. For specific reference, please refer to the above relevant description. For the sake of brevity, it will not be repeated here.

[0168] The embodiments of the present application also provide a storage medium (computer-readable storage medium). The storage medium stores one or more programs. Among them, the storage medium can include volatile memory, such as random access memory; the memory can also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; the memory can also include a combination of the above types of memory.

[0169] When one or more programs in the storage medium can be executed by one or more processors, the control method for the fluid pulsation of the compressor executed on the electronic device side as described above can be implemented.

[0170] The above-mentioned processor is used to execute the control program for fluid pulsation stored in the memory to implement the following steps of the control method for the fluid pulsation of the compressor executed on the electronic device side: Determine the discharge parameters of the fluid; Based on the discharge parameters, determine at least two target outlets from multiple outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are reduced in pulsation amplitude through phase superposition; Control the fluid to be discharged through at least two target outlets.

[0171] In addition, the computer program product provided by the embodiments of the present application may include computer-readable code. When the computer-readable code runs on a device, the processor in the device is caused to implement the steps of the following method for controlling compressor fluid pulsation performed on the electronic device side: Determine the discharge parameters of the fluid; Based on the discharge parameters, determine at least two target outlets from multiple outlets, wherein the pulsation waves generated by the fluids discharged from the at least two target outlets respectively are reduced in pulsation amplitude through phase superposition; Control the fluid to be discharged through the at least two target outlets.

[0172] Professionals should also be able to further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0173] The steps of the methods or algorithms described in combination with the embodiments disclosed herein can be implemented by hardware, software modules executed by a processor, or a combination of the two. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field.

[0174] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless otherwise clearly specified in the context, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be executed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0175] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling fluid pulsation of a compressor, characterized in that, The exhaust pipe of the compressor extends into the interior of the tank, and a plurality of outlets are provided on the exhaust pipe located inside the tank. The plurality of outlets are used to discharge the fluid compressed by the compressor. The method includes: Determine the discharge parameters of the fluid; Based on the discharge parameters, determine at least two target outlets from the plurality of outlets. Among them, the pulsating waves generated by the fluids discharged from the at least two target outlets respectively use the interference method of pulsating waves to reduce the pulsation amplitude through phase superposition; Control the fluid to be discharged through at least two target outlets; The determination of the discharge parameters of the fluid includes: Determine the operating frequency of the compressor, as well as the temperature and pressure of the exhaust pipe; Based on the operating frequency, determine the exhaust pulsation frequency of the compressor; Based on the temperature and the pressure, determine the wave speed of the fluid; Determine the exhaust pulsation frequency and the wave speed as the discharge parameters of the fluid.

2. The method according to claim 1, characterized in that, The determination of at least two target outlets from the plurality of outlets based on the discharge parameters includes: Determine the first pipe distance between every two outlets among the plurality of outlets, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; Determine a first distance and a second distance from the determined plurality of first pipe distances. Among them, the first distance is the largest first pipe distance among the determined plurality of first pipe distances, and the second distance is the smallest first pipe distance among the determined plurality of first pipe distances; Based on the first distance, the second distance and the discharge parameters, determine a target distance. Among them, the pulsating waves generated by the fluids discharged from the two outlets corresponding to the target distance respectively reduce the pulsation amplitude through phase superposition; Based on the target distance, determine at least two target outlets from the plurality of outlets.

3. The method according to claim 2, wherein The determination of at least two target outlets from the plurality of outlets based on the target distance includes: Determine the target outlet pair from the outlet pairs corresponding to the determined plurality of first pipe distances in ascending order of the gap from the target distance; Determine the phase difference of the fluid discharged by the target outlet pair; Determine whether the phase difference belongs to a preset phase difference interval; In the case where the phase difference belongs to the preset phase difference interval, determine the two outlets in the outlet pair as target outlets respectively.

4. The method according to any one of claims 1 to 3, characterized in that The positions of the plurality of outlets on the exhaust pipe located inside the tank are determined by the following method: Determine the exhaust pulsation frequency interval, the wave speed interval of the fluid and the target reduction amplitude; Based on the exhaust pulsation frequency interval, the wave speed interval and the target reduction amplitude, determine the third distance and the fourth distance between two outlets among the plurality of outlets. Among them, the third distance is the largest first pipe distance between two outlets among the plurality of outlets, and the fourth distance is the smallest first pipe distance between two outlets among the plurality of outlets. The first pipe distance represents the distance that the fluid flows from one outlet to another outlet; Based on the third distance and the fourth distance, determine the positions of the plurality of outlets on the exhaust pipe located inside the tank.

5. The method according to claim 4, wherein Determining a third distance and a fourth distance between two outlets among multiple outlets based on the exhaust pulsation frequency range, the wave speed range, and the target reduction amplitude includes: Determining a first exhaust pulsation frequency with the smallest value and a second exhaust pulsation frequency with the largest value from the exhaust pulsation frequency range; Determining a first wave speed with the largest value and a second wave speed with the smallest value from the wave speed range; Determining the third distance based on the first exhaust pulsation frequency, the first wave speed, and the target reduction amplitude; Determining the fourth distance 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 multiple outlets on the exhaust pipe inside the tank are determined by the following method: Determining a target operating frequency corresponding to the operating noise to be reduced by the compressor; Based on the target operating frequency, determining the positions of multiple outlets on the exhaust pipe inside the tank.

7. The method according to any one of claims 1-3, wherein The first pipe distances between any two of the multiple outlets are different, where the first pipe distance represents the distance that the fluid flows from one outlet to another outlet; and / or The distance between multiple outlets provided on the exhaust pipe inside the tank 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 pipe distance corresponding to the target outlet, where the second pipe distance represents the distance that the fluid flows from the compressor to the target outlet.

8. A control device for compressor fluid pulsation, characterized in that, The exhaust pipe of the compressor extends into the tank, and multiple outlets are provided on the exhaust pipe inside the tank. The multiple outlets are used to discharge the fluid compressed by the compressor. The device includes: A first determination unit configured to determine the discharge parameters of the fluid; A second determination unit configured to determine at least two target outlets from the multiple outlets based on the discharge parameters, where the pulsation waves generated by the fluids discharged from the at least two target outlets reduce the pulsation amplitude through phase superposition; A control unit configured to control the fluid to be discharged through at least two target outlets.

9. An air conditioning device, characterized in that, Including: A compressor, a tank, an exhaust pipe, and a processing unit; The compressor is connected to the exhaust pipe; The exhaust pipe extends into the tank; Multiple outlets are provided on the exhaust pipe inside the tank, and the multiple outlets are used to discharge the fluid compressed by the compressor; The processing unit is used to implement the control method for compressor fluid pulsation according to any one of claims 1-7 above.

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

Images