Air suction pipe assembly, refrigerating system and air conditioner

Abstract

The invention discloses an air suction pipe assembly, a refrigerating system and an air conditioner, and belongs to the technical field of refrigerating equipment. The air suction pipe assembly is applied to the refrigerating system comprising a compressor and a gas-liquid separator and comprises at least one air suction pipe and a driving assembly, one end of the air suction pipe is fixedly connected to the compressor, the other end of the air suction pipe is used for communicating with the gas-liquid separator, the air suction pipe comprises a deformation part, and the deformation part is configured to be capable of deforming in the axial direction of the air suction pipe; the driving assembly is configured to be capable of driving the deformation part to deform so as to increase or shorten the length of the air suction pipe. Active adjustment of the length of the air suction pipe is achieved, so that the air column modal frequency of the air suction pipe is changed, the air column modal frequency can be dynamically matched with the operation frequency of the compressor, performance loss caused by mismatching of the air column modal frequency of the air suction pipe and the operation frequency of the compressor is reduced, and the compressor is enabled to be within the frequency conversion range. And operation can be kept under high air suction efficiency and refrigerating capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a suction pipe assembly, a refrigeration system and an air conditioner. BACKGROUND

[0002] In the related art, in order to simplify the structure of the compressor and reduce the cost, it is common to remove the liquid accumulator provided by the compressor and instead use a gas-liquid separator in the refrigeration system to prevent liquid hammer. However, after removing the liquid accumulator, the pressure pulsation in the suction pipe increases, and when the operating frequency of the compressor changes, this pressure pulsation causes the compressor to be unable to maintain a high suction efficiency at all times, thereby reducing the refrigeration performance of the air conditioner. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application proposes a suction pipe assembly capable of actively adjusting the length of the suction pipe to change the gas column modal frequency, so as to dynamically match the operating frequency of the compressor.

[0004] The present application also proposes a refrigeration system and an air conditioner comprising the above-mentioned suction pipe assembly.

[0005] According to the suction pipe assembly of the first aspect of the present application, applied to a refrigeration system comprising a compressor and a gas-liquid separator, comprising: at least one suction pipe and a driving assembly, one end of the suction pipe being fixedly connected to the compressor, the other end being used for communication with the gas-liquid separator, the suction pipe comprising a deformation portion configured to be able to deform along the axial direction of the suction pipe; the driving assembly is configured to drive the deformation portion to deform, so as to increase or shorten the length of the suction pipe.

[0006] According to the suction pipe assembly of the present application, at least the following beneficial effects are achieved: The suction pipe assembly of the present application is provided with a deformation portion capable of deforming along the axial direction of the suction pipe, and the driving assembly is used to drive the deformation portion to deform, so as to increase or shorten the length of the suction pipe, thereby actively adjusting the length of the suction pipe and changing the gas column modal frequency of the suction pipe, so that it can dynamically match the operating frequency of the compressor. The problem that the compressor cannot maintain a high suction efficiency and refrigeration capacity at all times due to the change in the operating frequency of the compressor after removing the liquid accumulator is solved, the performance loss caused by the mismatch between the gas column modal frequency of the suction pipe and the operating frequency of the compressor is reduced, and the compressor can maintain a high suction efficiency within its variable frequency range.

[0007] According to some embodiments of the present application, the deformation portion is also configured to be able to deform along the radial direction of the suction pipe.

[0008] According to some embodiments of the present application, the air suction pipe assembly further comprises a controller electrically connected to the compressor and the driving assembly respectively, and configured to control the driving assembly according to the operating frequency of the compressor.

[0009] According to some embodiments of the present application, the deformation part is configured as a bellows, which comprises a plurality of crest parts and a plurality of trough parts, the crest parts and the trough parts are arranged alternately and connected to each other along the axial direction of the air suction pipe, and adjacent two crest parts can be driven to move towards or away from each other.

[0010] According to some embodiments of the present application, along the axial direction of the air suction pipe, the outer peripheral wall of the trough part closest to the compressor among the plurality of trough parts is configured as a first clamping groove, and the outer peripheral wall of the trough part farthest from the compressor among the plurality of trough parts is configured as a second clamping groove; the driving assembly comprises a first connecting part, a second connecting part and a driver, the first connecting part is clamped in the first clamping groove, the second connecting part is clamped in the second clamping groove, and the driver is used to drive the second connecting part to move relative to the first connecting part along the axial direction of the air suction pipe.

[0011] According to some embodiments of the present application, the first connecting part is configured as a first connecting plate provided with a first through hole, the second connecting part is configured as a second connecting plate provided with a second through hole, the first clamping groove and the second clamping groove respectively extend along the circumferential direction of the air suction pipe, the bellows passes through the first connecting plate and the second connecting plate in sequence, the first connecting plate is sleeved on the first clamping groove through the first through hole, and the second connecting plate is sleeved on the second clamping groove through the second through hole.

[0012] According to some embodiments of the present application, the driver is an electric motor, the electric motor is arranged between the first connecting plate and the second connecting plate and fixed to the first connecting plate, the second connecting plate is provided with a threaded hole, the driving assembly further comprises a lead screw, one end of the lead screw is connected to the electric motor, and the other end is threadedly matched with the threaded hole, and the electric motor is used to drive the lead screw to rotate.

[0013] According to some embodiments of the present application, the driving assembly further comprises a top rod, the driver is arranged between the first connecting plate and the second connecting plate, one end of the driver is fixed to the first connecting plate, the other end is connected to the top rod, the top rod abuts against the second connecting plate, and the driver is used to drive the top rod to move along the axial direction of the bellows.

[0014] According to some embodiments of the present application, the driver is one of a hydraulic cylinder, a pneumatic cylinder, a thermal actuator, an electrostrictive actuator and a magnetostrictive actuator.

[0015] According to some embodiments of the present application, the suction pipe assembly further comprises a filter, one end of the filter is connected to the end of the suction pipe away from the compressor along the axial direction, and the other end is used for communicating with the gas-liquid separator.

[0016] According to some embodiments of the present application, the compressor is a double-cylinder compressor, two suction pipes are provided, and the suction pipe assembly further comprises a tee joint, the tee joint comprises an inlet end and two outlet ends, the inlet end is connected with the filter, and the two outlet ends are connected with the deformation portions of the two suction pipes correspondingly.

[0017] According to some embodiments of the present application, the compressor is a double-cylinder compressor, two suction pipes are provided, and each of the suction pipes comprises a bending portion, the two bending portions are arranged at intervals, one end of the bending portion is connected with the corresponding deformation portion, and the other end is bent towards the peripheral wall of the compressor and fixed to the peripheral wall of the compressor.

[0018] According to the refrigeration system of the second aspect of the embodiments of the present application, the compressor comprises an exhaust pipe, the exhaust pipe is connected with the inlet end of the condenser, the outlet end of the condenser is connected with the inlet end of the throttling device, the outlet end of the throttling device is connected with the inlet end of the evaporator, the outlet end of the evaporator is connected with the inlet end of the gas-liquid separator, and the outlet end of the gas-liquid separator is connected with the suction pipe.

[0019] According to the refrigeration system of the embodiments of the present application, at least the following beneficial effects are achieved: The refrigeration system of the embodiments of the present application adopts the suction pipe assembly of the first aspect of the embodiments, actively adjusts the length of the suction pipe, changes the gas column modal frequency of the suction pipe, dynamically matches the operating frequency of the compressor, reduces the performance loss caused by the mismatch between the gas column modal frequency of the suction pipe and the operating frequency of the compressor, and enables the compressor to operate at a high suction efficiency within the frequency conversion range, thereby improving the energy efficiency of the refrigeration system and enhancing the dynamic refrigeration performance of the refrigeration system.

[0020] According to the air conditioner of the third aspect of the embodiments of the present application, the air conditioner comprises the refrigeration system of the second aspect of the embodiments.

[0021] According to the air conditioner of the embodiments of the present application, at least the following beneficial effects are achieved: The air conditioner of the embodiment of the present application adopts the refrigerating system of the second aspect embodiment, reduces the power consumption of the air conditioner by optimizing the structural design of the suction pipe assembly, saves the electricity expense of the user, and improves the frequency conversion performance of the air conditioner, so that the air conditioner has a faster refrigeration or heating response speed, and provides the user with a better use experience.

[0022] Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings and embodiments, wherein: Figure 1 An assembly schematic diagram for the suction pipe of an embodiment of the present application when mounted on a compressor; Figure 2 A structural schematic diagram of a suction pipe assembly of an embodiment of the present application; Figure 3 A front view schematic diagram of a suction pipe assembly of an embodiment of the present application; Figure 4 An exploded schematic diagram of a suction pipe assembly of an embodiment of the present application; Figure 5 A structural schematic diagram of a suction pipe assembly of another embodiment of the present application; Figure 6 A structural schematic diagram of a refrigerating system of an embodiment of the present application.

[0024] LIST OF ELEMENTS A refrigerating system 1000; A suction pipe assembly 100; A suction pipe 110; a deformation part 111; a corrugated pipe 112; a wave crest part 1121; a wave trough part 1122; a first clamping slot 113; a second clamping slot 114; a bending part 115; A driving assembly 120; a first connecting plate 121; a first through hole 1211; a second connecting plate 122; a second through hole 1222; a threaded hole 1221; a driver 123; a lead screw 124; a top rod 125; A filter 130; A three-way joint 140; A compressor 200; a casing 210; a first air inlet 220; a second air inlet 230; an exhaust pipe 240; A gas-liquid separator 300; a condenser 400; a throttling device 500; an evaporator 600. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described below in the detailed description and illustrated in the accompanying drawings by way of examples, which together serve to explain the present application, and are not understood as limiting the present application.

[0026] In the description of the present application, it should be understood that the orientation description, such as the upper, lower, etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In the description of the present application, if there is a description of the first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] In order to prevent liquid strike, the traditional compressor will be equipped with a liquid accumulator. When the gas-liquid mixed refrigerant enters the liquid accumulator, the liquid accumulator can realize gas-liquid separation, so as to ensure that only gas enters the cylinder of the compressor, thereby preventing liquid strike. In related technologies, in order to simplify the structure of the compressor and reduce the cost, the common method is to remove the liquid accumulator equipped with the compressor, and instead use the gas-liquid separator in the refrigeration system to prevent liquid strike.

[0030] However, after removing the liquid accumulator, the pressure pulsation in the suction pipe will increase, resulting in larger vibration and noise. More importantly, for a variable frequency compressor, the length of the suction pipe has a direct impact on the refrigeration performance. In the absence of a liquid accumulator buffer, the fixed length of the suction pipe is difficult to match the higher performance requirements at all operating frequencies, resulting in a decrease in the refrigeration capacity and operating efficiency of the compressor at different speeds. In other words, when the operating frequency of the compressor changes, this pressure pulsation will cause the compressor to be unable to maintain a high suction efficiency at all times, thereby reducing the refrigeration performance of the air conditioner.

[0031] In order to solve the above problems, some embodiments of the present application propose a suction pipe assembly 100 suitable for a refrigeration system 1000 including a compressor 200 and a gas-liquid separator 300, which can actively adjust the length of the suction pipe 110 to change the gas column modal frequency, so as to dynamically match the operating frequency of the compressor 200. For details, please refer to Figures 1 to 6The suction pipe assembly 100 is described.

[0032] For convenience of description, the following description takes the application of the suction pipe assembly 100 to a refrigeration system 1000 comprising a compressor 200 and a gas-liquid separator 300 as an example for illustration.

[0033] Specifically, as shown in Figure 1 and Figure 2 In the embodiment of the present application, the refrigeration system 1000 comprises at least one suction pipe 110 and a driving assembly 120. The suction pipe 110 serves as a passage for conveying gaseous refrigerant in the gas-liquid separator 300 to a cylinder in the compressor 200 for compression by the compressor 200. Based on this, one end of the suction pipe 110 is fixedly connected to the compressor 200 and communicates with the cylinder in the compressor 200, and the other end is used for communication with the gas-liquid separator 300.

[0034] As shown in Figure 2 In the embodiment of the present application, the suction pipe 110 comprises a deformation portion 111, which refers to a structural segment on the suction pipe 110 having elastic deformation capability and is configured to be capable of deforming along the axial direction of the suction pipe 110. In the embodiment, the driving assembly 120 is connected to the deformation portion 111 and is used for applying an acting force to the deformation portion 111 to drive the deformation portion 111 to deform. For example, the driving assembly 120 can drive the deformation portion 111 to produce axial deformation by linear displacement, so that the axial dimension of the deformation portion 111 changes, thereby increasing or shortening the overall length of the suction pipe 110.

[0035] It can be understood that the embodiment of the present application actively adjusts the total length of the suction pipe 110 by changing the extension or contraction state of the deformation portion 111. Specifically, the suction pipe 110 adjusts the length by the elastic deformation capability of the deformation portion 111. When the operating frequency of the compressor 200 changes, the driving assembly 120 can apply an acting force to the deformation portion 111 along the axial direction of the suction pipe 110 to make the deformation portion 111 produce axial tensile or compressive deformation.

[0036] For example, when it is necessary to increase the gas column modal frequency of the suction pipe 110, the driving assembly 120 shortens the length of the deformation portion 111, thereby reducing the total length of the suction pipe 110; when it is necessary to reduce the gas column modal frequency of the suction pipe 110, the driving assembly 120 lengthens the length of the deformation portion 111. This dynamic adjustment enables the gas column natural frequency of the suction pipe 110 to be matched with the current operating frequency of the compressor 200 in real time.

[0037] It should be noted that the length of the suction pipe 110 is directly related to the performance of the compressor 200 without the liquid accumulator. This is because the gas column modal frequency in the suction pipe 110 is determined by its length, and the compressor 200 requires a higher length of the suction pipe 110 at different operating frequencies. Therefore, in order to enable the compressor 200 to maintain good performance at all operating frequencies, the suction pipe assembly 100 of the embodiment of the present application is provided with a deformation part 111 capable of deforming along the axial direction of the suction pipe 110 in the suction pipe 110, and the deformation part 111 is driven to deform by the driving assembly 120 to increase or shorten the length of the suction pipe 110.

[0038] The embodiment of the present application actively adjusts the length of the suction pipe 110, thereby changing the gas column modal frequency of the suction pipe 110, so that it can dynamically match the operating frequency of the compressor 200. This first solves the problem that the compressor 200 cannot always maintain high suction efficiency and refrigeration capacity due to changes in the operating frequency of the compressor 200 after removing the liquid accumulator, reduces the performance loss caused by the mismatch between the gas column modal frequency of the suction pipe 110 and the operating frequency of the compressor 200, and enables the compressor 200 to operate at a high suction efficiency within its variable frequency range. More importantly, actively matching the gas column modal frequency of the suction pipe 110 to the operating frequency of the compressor 200 can produce gas column resonance, in which state the cylinder of the compressor 200 can suck in more refrigerant gas, thereby significantly improving the suction efficiency of the compressor 200 and improving the refrigeration capacity of the refrigeration system 1000.

[0039] In addition, the liquid accumulator of the compressor 200 has the effect of reducing pressure pulsation. Therefore, when the liquid accumulator is removed, the pressure pulsation in the return pipe will increase significantly, thereby causing more severe vibration and noise. In order to solve the above problems, in the embodiment of the present application, the deformation part 111 is also configured to be capable of deforming along the radial direction of the suction pipe 110. In this embodiment, the pipe wall of the deformation part 111 is flexible.

[0040] Therefore, the deformation part 111 can passively buffer and absorb pressure pulses through its own radial expansion, so that it can passively buffer and absorb pressure pulses through its own radial expansion, thereby effectively reducing pressure pulsation, achieving the purpose of reducing vibration and noise, and also can isolate the vibration transmission between the compressor 200 and the gas-liquid separator 300 to some extent. In addition, the deformation part 111 can also actively adjust its axial length under the action of the driving assembly 120, thereby simultaneously achieving passive suppression of vibration and noise and active adjustment of operating performance.

[0041] In the embodiment of the present application, the suction pipe assembly 100 further comprises a controller, which is specifically an electronic device capable of receiving and processing the operating frequency signal of the compressor 200, and can be implemented by a microcontroller or programmable logic controller. In the embodiment, the controller is electrically connected with the compressor 200 and the driving assembly 120, respectively, and is used to convert the operating frequency signal of the compressor 200 into a control instruction for the driving assembly 120, so as to accurately control the circumferential length of the deformation part 111.

[0042] In the embodiment of the present application, the operating frequency of the compressor 200 can be obtained by a rotating speed sensor or a current frequency detection device arranged on the main shaft of the compressor 200, and the controller is configured to be capable of obtaining the operating frequency of the compressor 200 and controlling the driving assembly 120 according to the operating frequency of the compressor 200. Specifically, during the operation of the compressor 200, the controller continuously collects the real-time operating frequency. When a change in the operating frequency is detected, the controller can calculate the optimal length parameter of the suction pipe 110 corresponding to the current operating frequency by a preset algorithm, and generate a corresponding control signal to be sent to the driving assembly 120.

[0043] The driving assembly 120 applies an axial stretching or compression action to the deformation part 111 in response to the received signal, so that the length of the suction pipe 110 is adaptively adjusted. By accurately and dynamically adjusting the length of the suction pipe 110, the natural modal frequency of the refrigerant gas column in the suction pipe 110 is changed, so as to keep a matching relationship with the current operating frequency of the compressor 200.

[0044] It can be understood that, in the embodiment of the present application, the deformation part 111 needs to both reduce the vibration transmission of the pipeline and change its length with the operating frequency of the compressor 200, and therefore, the deformation part 111 needs to have both the real-time variable ability and sufficient gas pressure bearing capacity. For conventional high polymer flexible hoses such as rubber hoses, although their structure, diameter and length are easy to change, they are difficult to meet the requirements of the system, such as pressure, temperature, and no chemical reaction with refrigerant.

[0045] Based on this, as shown in Figure 3 and Figure 4 in the embodiment of the present application, the deformation part 111 is configured as a bellows 112, and it should be noted that the bellows 112 is a tubular structure with expansion ability, which can be formed by stamping, spinning or welding process by using metal or high polymer material. In the embodiment, the bellows 112 is made of stainless steel, and the stainless steel bellows 112 has both the flexibility required for length change and the high mechanical strength required for bearing the gas pressure in the refrigeration system 1000. In addition, it has stable chemical properties and will not react with the refrigerant.

[0046] Specifically, continuing to refer toFigure 3 and Figure 4 As shown, in this embodiment of the invention, the bellows 112 includes a plurality of crests 1121 and a plurality of troughs 1122, wherein the crests 1121 are outwardly protruding corrugations, and the troughs 1122 are inwardly recessed corrugations. In this embodiment, the crests 1121 and troughs 1122 are arranged alternately along the axial direction of the intake pipe 110, and adjacent crests 1121 and troughs 1122 are connected by arc-shaped transition sections, so that the bellows 112 has deformability in both the axial and radial directions of the intake pipe 110.

[0047] In this embodiment of the invention, when the drive assembly 120 applies axial tension or pressure, two adjacent corrugated sections 1121 can move toward or away from each other, thereby adjusting the distance between the two adjacent corrugated sections 1121 and thus changing the total axial length of the entire bellows 112. The principle of the radial deformation of the bellows 112 is a deformation mechanism that couples axial and radial forces. Specifically, when the pressure pulsation in the intake pipe 110 acts on the deformable section 111, the pressure causes each corrugated section 111 to undergo both axial and radial deformation simultaneously. This is because the pressure fluctuation first causes a microscopic axial deformation in each corrugated section, and this local axial deformation simultaneously causes the corrugated section to undergo corresponding radial deformation (i.e., expansion or contraction).

[0048] Reference Figure 3 and Figure 4 As shown, in this embodiment of the invention, along the axial direction of the intake pipe 110, the outer peripheral wall of the trough 1122 closest to the compressor 200 among the plurality of troughs 1122 is constructed as a first groove 113, and the outer peripheral wall of the trough 1122 furthest from the compressor 200 among the plurality of troughs 1122 is constructed as a second groove 114. For ease of description, ... Figure 4 Taking the vertical direction as an example, in this embodiment, the upper end of the suction pipe 110 is connected to the gas-liquid separator 300, and the lower end is connected to the compressor 200. Based on this, the outer peripheral wall of the first trough 1122 in the bellows 112 from top to bottom is the second groove 114, and the outer peripheral wall of the last trough 1122 is the first groove 113.

[0049] In this embodiment of the invention, the drive assembly 120 includes a first connecting part, a second connecting part, and a driver. The first connecting part is engaged with a first slot 113, the second connecting part is engaged with a second slot 114, and the driver is used to drive the second connecting part to move relative to the first connecting part along the axial direction of the intake pipe 110.

[0050] Specifically, in combination Figure 4It can be understood that the first clamping groove 113 and the second clamping groove 114 respectively extend along the circumference of the suction pipe 110, forming a continuous annular groove structure. In the embodiment of the present application, the first connecting part is configured as a first connecting plate 121, and the second connecting part is configured as a second connecting plate 122. The first connecting plate 121 is provided with a first through hole 1211, and the second connecting plate 122 is provided with a second through hole 1222, both of which are adapted for the bellows 112 to pass through, and the bellows 112 passes through the first connecting plate 121 and the second connecting plate 122 in turn from bottom to top.

[0051] In combination Figure 3 It can be understood that the inner diameter of the first through hole 1211 and the second through hole 1222 matches the outer diameter of the bellows 112 at the first clamping groove 113 and the second clamping groove 114, so that the first connecting plate 121 is sleeved on the first clamping groove 113 through the first through hole 1211, and the second connecting plate 122 is sleeved on the second clamping groove 114 through the second through hole 1222, thereby realizing that the first connecting plate 121 is clamped in the first clamping groove 113, and the second connecting plate 122 is clamped in the second clamping groove 114. The driver 123 is used to drive the second connecting plate 122 to move along the axial direction of the suction pipe 110 relative to the first connecting plate 121, so as to change the distance between the first connecting plate 121 and the second connecting plate 122, thereby realizing the adjustment of the axial length of the bellows 112, and further adjusting the overall length of the suction pipe 110.

[0052] Specifically, the bellows 112 forms a telescopic structure through the alternately arranged wave crest part 1121 and wave trough part 1122, when the driver 123 pushes the second connecting plate 122 away from the first connecting plate 121, the increase of the distance between adjacent wave crest parts 1121 causes the axial elongation of the bellows 112; when the driver 123 pulls the second connecting plate 122 close to the first connecting plate 121, the decrease of the distance between adjacent wave crest parts 1121 causes the axial shortening of the bellows 112. The clamping of the first connecting plate 121 and the first clamping groove 113 fixes the axial position of the end of the bellows 112 close to the compressor 200, and the clamping of the second connecting plate 122 and the second clamping groove 114 accurately transmits the displacement of the end of the bellows 112 away from the compressor 200 to the entire deformation part 111.

[0053] Referring to Figure 4 In an example, the driver 123 is an electric motor, which can be a stepper motor or a servo motor. The electric motor is arranged between the first connecting plate 121 and the second connecting plate 122, and is fixed to the first connecting plate 121. In this embodiment, the first connecting plate 121 on the relatively lower side is used as a fixed end to bear the electric motor, and the second connecting plate 122 is used as a moving end.

[0054] Specifically, continuing to refer toFigure 4 As shown in the embodiment of the present application, the driving assembly 120 further comprises a screw rod 124, and the second connecting plate 122 is provided with a threaded hole 1221 matched with the screw rod 124. One end of the screw rod 124 is connected to a motor, and the other end is threadedly matched with the threaded hole 1221. The threaded hole 1221 and the screw rod 124 are matched to realize the conversion from rotary motion to linear motion. The motor is used to drive the screw rod 124 to rotate, and can realize the accurate rotation angle control of the screw rod 124 by receiving the control signal.

[0055] Specifically, referring to Figure 3 As shown, after the motor is fixed to the first connecting plate 121, the rotation axis of the screw rod 124 is kept parallel to the axial direction of the bellows 112. When the motor receives the control signal, the screw rod 124 is driven to rotate around its own axis. Due to the constraint of the threaded pair formed by the threaded hole 1221 of the second connecting plate 122 and the screw rod 124, the rotary motion of the screw rod 124 forces the second connecting plate 122 to produce linear displacement along the axial direction of the bellows 112. With the movement of the second connecting plate 122, the spacing between the adjacent wave crest portions 1121 of the bellows 112 changes, thereby realizing the continuous adjustment of the length of the suction pipe 110. It should be noted that in this process, the first connecting plate 121 remains in a fixed state.

[0056] Referring to Figure 4 As shown, in another example, the driving assembly 120 further comprises a top rod 125, which is a rigid transmission member. The driver 123 is arranged between the first connecting plate 121 and the second connecting plate 122, and one end of the driver 123 is fixed to the first connecting plate 121 and the other end is connected to the top rod 125. In this embodiment, the first connecting plate 121 located on the opposite lower side serves as a fixed end for bearing the driver 123, and the second connecting plate 122 serves as a moving end. The top rod 125 abuts against the lower side of the second connecting plate 122, and the driver 123 is used to drive the top rod 125 to move along the axial direction of the bellows 112.

[0057] It can be understood that the lower end of the top rod 125 is arranged in the driver 123, and the driver 123 can drive the top rod 125 to extend out of the driver 123 or retract into the driver 123 along the axial direction of the bellows 112. In this embodiment, the driver 123 is one of a hydraulic cylinder, a pneumatic cylinder, a thermal-actuated actuator, an electro-actuated actuator and a magnetic-actuated actuator. Specifically, when the operating frequency of the compressor 200 changes, the driver 123 is started according to the control signal, and the second connecting plate 122 is pushed or pulled by the top rod 125, so that the spacing between the adjacent wave crest portions 1121 of the bellows 112 changes. The axial expansion and contraction of the bellows 112 directly adjusts the total length of the suction pipe 110, thereby changing the gas column modal frequency.

[0058] In one example, the driver 123 is a hydraulic cylinder, and the hydraulic system drives the ejector rod 125 to move by adjusting the oil pressure; in another example, the driver 123 is a thermal expansion actuator, and the expansion is achieved by controlling the temperature change of the material through the current.

[0059] Referring to Figure 4 and Figure 3 In the embodiment of the present application, the suction pipe assembly 100 further comprises a filter 130, which is connected to the end of the suction pipe 110 away from the compressor 200 along the axial direction, and is used to communicate with the gas-liquid separator 300. Specifically, the filter 130 is a gas flow filtering device arranged at the gas inlet end of the suction pipe 110. The filter 130 can be implemented by using metal filter screen, porous ceramic or high polymer filtering material, and the pore size thereof can be controlled within the range of 0.1-0.5 mm, for example, to intercept solid impurities such as metal debris, welding slag or oil sludge carried in the refrigerant.

[0060] Specifically, when the refrigerant flows from the gas-liquid separator 300 to the compressor 200, the refrigerant flowing through the suction pipe 110 first passes through the filter 130. The filter 130 intercepts the flowing medium step by step through the multi-layer filtering structure inside it, in which the larger particles are stopped by the filter screen surface, and the tiny particles are adsorbed by the porous material. The inlet and outlet ends of the filter 130 are sealingly connected with the gas inlet end of the suction pipe 110 and the outlet end of the gas-liquid separator 300, respectively.

[0061] In the embodiment of the present application, the compressor 200 is a double-cylinder compressor 200, which refers to a compressor 200 structure comprising two independent working cylinders, and the two cylinders share the same drive shaft but have independent chambers. Correspondingly, in the embodiment, two suction pipes 110 are provided, which are arranged at intervals along the radial direction of the compressor 200, and the two suction pipes 110 are kept at a distance from the peripheral wall of the compressor 200 to avoid interference.

[0062] Referring to Figure 5 and Figure 4 In the embodiment of the present application, each suction pipe 110 comprises a bending portion 115, which is a curved section formed by plastic deformation at the end of the suction pipe 110, and can be implemented by using a metal pipe bending forming process. One end of the bending portion 115 is connected with the corresponding deformation portion 111, and the other end is bent towards the peripheral wall of the compressor 200 and fixed to the peripheral wall of the compressor 200, and forms a sealing connection with the gas inlet on the shell of the compressor 200. The arrangement of the bending portion 115 enables the end of the suction pipe 110 to accurately dock with the gas inlet on the shell of the compressor 200, while avoiding excessive occupation of installation space by the pipeline.

[0063] Specifically, in the working process of the double-cylinder compressor 200, the suction strokes of the two cylinders have a phase difference, resulting in a difference in suction pulsation. In the embodiment of the present application, two independent suction pipes 110 are arranged, so that each cylinder corresponds to an independent deformation part 111, and the driving assembly 120 can adjust the lengths of the two suction pipes 110 respectively. When the compressor 200 is at different speeds, the lengths of the suction pipes 110 are changed to adjust the natural frequency of the gas column, so that it matches the working frequency of the compressor 200.

[0064] Referring to Figure 5 In the embodiment of the present application, the suction pipe assembly 100 further comprises a three-way joint 140, for example, a Y-shaped joint. In this embodiment, the gaseous refrigerant flowing out of the gas-liquid separator 300 first enters the filter 130 for impurity filtration, and then the filtered gas flows into the Y-shaped three-way joint. The Y-shaped three-way joint is used as a flow dividing component, and its single inlet end is connected to the filter 130, and its two outlet ends are connected to the two suction pipes 110 respectively, so as to distribute the gas flow to the two cylinders of the double-cylinder compressor 200.

[0065] In the embodiment of the present application, the double-cylinder compressor 200 comprises a casing 210 and two cylinders arranged in the casing 210. The two cylinders are arranged in a stacked manner in the up-down direction, and the overall height of the compressor 200 can be effectively reduced by the layered arrangement. Correspondingly, referring to Figure 1 As shown in the figure, the casing 210 is provided with a first gas inlet 220 and a second gas inlet 230 which respectively communicate with the two cylinders. The first gas inlet 220 and the second gas inlet 230 are refrigerant inlets corresponding to the upper and lower cylinders respectively, and are arranged in a staggered manner.

[0066] Specifically, referring to Figure 3 and Figure 3 As shown in the figures, the first gas inlet 220 is arranged on the upper side of the second gas inlet 230. In the radial direction of the compressor 200, the bending part 115 of the suction pipe 110 located on the relatively inner side is connected to the first gas inlet 220, and the bending part 115 of the suction pipe 110 located on the relatively outer side is connected to the second gas inlet 230. For the convenience of description, the up-down direction and the left-right direction in Figure 1 Figure 1 Figure 3 Figure 3 are taken as examples for illustration. The left bending part 115 extends downward with a smaller amplitude, while the right bending part 115 extends downward with a larger amplitude, and it is bent to the left around the left bending part 115, so that its port is located on the lower side of the port of the left bending part 115.

[0067] The embodiment of the present application forms a channel with adjustable length for the suction path of two cylinders, and when the compressor 200 is running in the variable frequency condition, the two suction pipes 110 can be adjusted according to the suction demand of the cylinder. In addition, the layout that the inner suction pipe 110 is connected to the upper cylinder and the outer suction pipe 110 is connected to the lower cylinder can make full use of the radial space of the compressor 200 shell 210, so that the pipeline arrangement is clear and the structure is compact.

[0068] It should be noted that the gas modal frequency refers to the gas modal frequency of the whole gas return system formed after the two bellows 112 are connected, rather than the independent modal frequency of each bellows 112. Therefore, in the embodiment of the present application, the lengths of the two bellows 112 are not controlled independently, but are adjusted synchronously by the driving assembly 120 to control the total length formed by the connection of the two bellows 112, which determines the overall gas column modal frequency in the gas return pipe system, so as to realize the dynamic matching of the modal frequency and the compressor operating frequency.

[0069] The embodiment of the present application also provides a refrigeration system 1000, the compressor 200, the condenser 400, the throttling device 500, the evaporator 600, the gas-liquid separator 300 and the suction pipe assembly 100 of the above-mentioned embodiment, the compressor 200 comprises an exhaust pipe 240, the exhaust pipe 240 is connected with the inlet end of the condenser 400, the outlet end of the condenser 400 is connected with the inlet end of the throttling device 500, the outlet end of the throttling device 500 is connected with the inlet end of the evaporator 600, the outlet end of the evaporator 600 is connected with the inlet end of the gas-liquid separator 300, and the outlet end of the gas-liquid separator 300 is connected with the suction pipe 110.

[0070] The refrigeration system 1000 of the embodiment of the present application adopts the suction pipe assembly 100 of the above-mentioned embodiment, and the length of the suction pipe 110 is actively adjusted to change the gas column modal frequency of the suction pipe 110, so that it can dynamically match the operating frequency of the compressor 200, reduce the performance loss caused by the mismatch between the gas column modal frequency of the suction pipe 110 and the operating frequency of the compressor 200, and make the compressor 200 run at a higher suction efficiency within its variable frequency range. Not only the energy efficiency of the refrigeration system 1000 is improved, but also the dynamic refrigeration performance of the refrigeration system 1000 is improved.

[0071] Since the refrigeration system 1000 adopts all the technical solutions of the suction pipe assembly 100 of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be repeated here.

[0072] The embodiment of the present application also provides an air conditioner comprising the refrigeration system 1000 of the above-mentioned embodiment.

[0073] The air conditioner of the embodiment of the present application adopts the air suction pipe assembly 100 of the above-mentioned embodiment, optimizes the structural design of the air suction pipe assembly 100, reduces the power consumption of the air conditioner, saves the electricity cost for the user, improves the frequency conversion performance of the air conditioner, makes the air conditioner have a faster refrigeration or heating response speed, and provides the user with a better use experience.

[0074] Since the air conditioner adopts all the technical solutions of the refrigeration system 1000 of the above-mentioned embodiment, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiment are possessed, which will not be repeated here.

[0075] Of course, the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A suction pipe assembly, used in a refrigeration system including a compressor and a gas-liquid separator, characterized in that, include: At least one suction pipe, one end of which is fixedly connected to the compressor and the other end is used to communicate with the gas-liquid separator, the suction pipe including a deformable part configured to deform along the axial direction of the suction pipe; The drive component is configured to drive the deformation portion to deform in order to increase or decrease the length of the inhalation tube.

2. The inhalation tube assembly according to claim 1, characterized in that, The deformable part is also configured to deform radially along the intake tube.

3. The inhalation tube assembly according to claim 1 or 2, characterized in that, The intake pipe assembly also includes a controller electrically connected to both the compressor and the drive assembly, and the controller is configured to control the drive assembly according to the operating frequency of the compressor.

4. The inhalation tube assembly according to claim 1 or 2, characterized in that, The deformable part is constructed as a bellows, which includes multiple crests and multiple troughs. The crests and troughs are arranged alternately and connected to each other along the axial direction of the intake pipe. Two adjacent crests can be driven to move toward or away from each other.

5. The inhalation tube assembly according to claim 4, characterized in that, Along the axial direction of the intake pipe, the outer peripheral wall of the trough closest to the compressor among the plurality of troughs is configured as a first slot, and the outer peripheral wall of the trough furthest from the compressor among the plurality of troughs is configured as a second slot; the drive assembly includes a first connecting part, a second connecting part, and a driver, the first connecting part being engaged in the first slot, the second connecting part being engaged in the second slot, and the driver being used to drive the second connecting part to move relative to the first connecting part along the axial direction of the intake pipe.

6. The inhalation tube assembly according to claim 5, characterized in that, The first connecting part is configured as a first connecting plate, and the first connecting plate has a first through hole. The second connecting part is configured as a second connecting plate, and the second connecting plate has a second through hole. The first slot and the second slot extend along the circumference of the air intake pipe. The corrugated pipe passes through the first connecting plate and the second connecting plate in sequence. The first connecting plate is sleeved on the first slot through the first through hole, and the second connecting plate is sleeved on the second slot through the second through hole.

7. The inhalation tube assembly according to claim 6, characterized in that, The driver is a motor, which is located between the first connecting plate and the second connecting plate and fixed to the first connecting plate. The second connecting plate has a threaded hole. The driving assembly also includes a lead screw, one end of which is connected to the motor and the other end is threaded into the threaded hole. The motor is used to drive the lead screw to rotate.

8. The inhalation tube assembly according to claim 6, characterized in that, The drive assembly further includes a push rod. The driver is disposed between the first connecting plate and the second connecting plate. One end of the driver is fixed to the first connecting plate, and the other end is connected to the push rod. The push rod abuts against the second connecting plate. The driver is used to drive the push rod to move axially along the bellows.

9. The inhalation tube assembly according to claim 8, characterized in that, The actuator is one of a hydraulic cylinder, a pneumatic cylinder, a thermostrictive actuator, an electrostrictive actuator, and a magnetostrictive actuator.

10. The inhalation tube assembly according to claim 1, characterized in that, The suction pipe assembly also includes a filter, one end of which is connected to the end of the suction pipe away from the compressor along its axial direction, and the other end is used to communicate with the gas-liquid separator.

11. The inhalation tube assembly according to claim 10, characterized in that, The compressor is a twin-cylinder compressor, and the intake pipe has two parts. The intake pipe assembly also includes a three-way connector, which has an inlet end and two outlet ends. The inlet end is connected to the filter, and the two outlet ends are connected to the deformed parts of the two intake pipes respectively.

12. The inhalation tube assembly according to claim 1, characterized in that, The compressor is a twin-cylinder compressor, and there are two suction pipes. Each suction pipe includes a bend, and the two bends are spaced apart. One end of the bend is connected to the corresponding deformation part, and the other end is bent toward the peripheral wall of the compressor and fixed to the peripheral wall of the compressor.

13. A refrigeration system, characterized in that, The device includes a compressor, a condenser, a throttling device, an evaporator, a gas-liquid separator, and a suction pipe assembly as described in any one of claims 1 to 12. The compressor includes a discharge pipe connected to the inlet end of the condenser, the outlet end of the condenser connected to the inlet end of the throttling device, the outlet end of the throttling device connected to the inlet end of the evaporator, the outlet end of the evaporator connected to the inlet end of the gas-liquid separator, and the outlet end of the gas-liquid separator connected to the suction pipe.

14. An air conditioner, characterized in that, Includes the refrigeration system as described in claim 13.

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