Air suction structure, liquid separator, compressor and control method

Abstract

The invention discloses an air suction structure, a liquid separator, a compressor and a control method, the air suction structure comprises a fixed air suction pipe, a first movable air suction pipe and a second movable air suction pipe, and the first movable air suction pipe is movably arranged with the fixed air suction pipe and communicates with the fixed air suction pipe; the second movable air suction pipe is movably arranged with the fixed air suction pipe and is communicated with the fixed air suction pipe; the caliber of the gas inlet of the first movable gas suction pipe is larger than that of the gas inlet of the second movable gas suction pipe. The diameters of the air inlets of the first movable air suction pipe and the second movable air suction pipe are different, and the relatively large diameter can increase the air suction amount and reduce the air suction resistance, so that the problem that the air suction amount of the compressor is insufficient during high-frequency operation can be effectively solved, and the relatively small diameter can reduce the air suction amount and increase the air suction resistance; therefore, the problem that air suction carries liquid during low-frequency operation of the compressor can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an air suction structure, a liquid distributor, a compressor and a control method. Background Art

[0002] As a key component for the safe and reliable operation of the compressor, the liquid distributor in the rotary compressor needs to have a reasonable structural design to meet the liquid storage function when the compressor is running. However, in practical applications, the focus should be on poor liquid storage, which causes excessive refrigerant liquid to directly enter the compressor pump body, thereby causing abnormal operation caused by the compressor suction liquid. Secondly, if the suction resistance in the compressor liquid distributor is too large, there will not be enough refrigerant gas entering the compressor pump body to participate in the refrigeration cycle, resulting in poor performance of the compressor in the air conditioning system.

[0003] There are relatively mature solutions to solve the problem of liquid contamination in the compressor suction air. These solutions mainly solve the problem of liquid contamination by increasing the suction resistance of the liquid distributor or lengthening the suction distance. For example, the Chinese patents with the following publication numbers: CN113819687A, CN104215002A, CN111219317A, CN108954995A, CN107975986A, CN115823780A, etc. Although these methods can solve the problem of liquid contamination in the suction air well, at the same time, due to the increase in suction resistance, the air intake volume inside the compressor will be reduced, especially when operating at high frequency, the reduction in refrigerant intake volume will greatly reduce the maximum operating capacity of the air-conditioning system. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an air intake structure, a liquid distributor, a compressor and a control method, aiming to effectively solve the problem of low-frequency air intake containing liquid and the problem of insufficient air intake of the compressor when the air conditioner is running at high frequency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides an air-intake structure, comprising:

[0007] Fixed air intake pipe;

[0008] a first movable air intake pipe, movably arranged with the fixed air intake pipe and communicated with the fixed air intake pipe;

[0009] a second movable air intake pipe, movably arranged with the fixed air intake pipe and communicated with the fixed air intake pipe;

[0010] Wherein, the diameter of the gas inlet of the first movable air intake pipe is larger than the diameter of the gas inlet of the second movable air intake pipe.

[0011] Further, the fixed air intake duct, the first movable air intake duct and the second movable air intake duct are coaxially arranged, the first movable air intake duct can move axially relative to the fixed air intake duct, and the second movable air intake duct can move axially relative to the fixed air intake duct.

[0012] Furthermore, the first movable air intake pipe is arranged on the outer side of the fixed air intake pipe, and the second movable air intake pipe is arranged on the inner side of the fixed air intake pipe.

[0013] Furthermore, the first movable air intake pipe comprises a sleeve portion and a flared pipe portion, the sleeve portion is movably sleeved on the periphery of the fixed air intake pipe, the flared pipe portion is coaxially arranged with the sleeve portion, and the flared pipe portion is located on the periphery of the sleeve portion.

[0014] Furthermore, a first limiting structure for preventing the first movable air intake pipe from being separated from the fixed air intake pipe is provided between the first movable air intake pipe and the fixed air intake pipe, and a second limiting structure for preventing the second movable air intake pipe from being separated from the fixed air intake pipe is provided between the second movable air intake pipe and the fixed air intake pipe.

[0015] Furthermore, it also includes a mobile driving structure, and the mobile driving structure is used to drive the first movable air intake pipe and the second movable air intake pipe to move relative to the fixed air intake pipe.

[0016] In the second aspect, the present invention also provides an adjustable liquid distributor, including a liquid separator tank and the above-mentioned air suction structure, wherein the liquid separator tank is provided with an air suction port, the air suction structure is arranged in the liquid separator tank, and the gas inlet ends of the first movable air suction pipe and the second movable air suction pipe are both arranged close to the air suction port.

[0017] Furthermore, it also includes a pressure sensor and a temperature sensor, the pressure sensor is used to detect the pressure data of the refrigerant in the outlet pipe, and the temperature sensor is used to detect the temperature data of the refrigerant in the outlet pipe.

[0018] In a third aspect, the present invention further provides a compressor comprising the above-mentioned adjustable liquid distributor.

[0019] In a fourth aspect, the present invention further provides a method for adjusting the amount of air intake, comprising:

[0020] Collect the pressure and temperature data of the refrigerant in the outlet pipe;

[0021] Calculate the superheat of the refrigerant based on the pressure data and temperature data;

[0022] If the superheat of the refrigerant in the outlet pipe is greater than a set threshold, the position of the first movable air intake pipe is adjusted to guide the gas into the fixed air intake pipe by using the first movable air intake pipe;

[0023] If the superheat of the refrigerant in the outlet pipe is less than a set threshold, the position of the second movable air intake pipe is adjusted to use the second movable air intake pipe to guide the gas into the fixed air intake pipe.

[0024] Compared with the prior art, the beneficial effects of the present invention are: an air intake structure, including a fixed air intake pipe, a first movable air intake pipe and a second movable air intake pipe, the first movable air intake pipe is movably arranged with the fixed air intake pipe and is connected with the fixed air intake pipe; the second movable air intake pipe is movably arranged with the fixed air intake pipe and is connected with the fixed air intake pipe; wherein the caliber at the gas inlet of the first movable air intake pipe is larger than the caliber at the gas inlet of the second movable air intake pipe. In the present invention, since the calibers at the gas inlets of the first movable air intake pipe and the second movable air intake pipe are different, the relatively large caliber can increase the air intake volume and reduce the air intake resistance, thereby effectively solving the problem of insufficient air intake volume of the compressor during high-frequency operation, while the relatively small caliber can reduce the air intake volume and increase the air intake resistance, thereby effectively solving the problem of air intake liquid when the compressor is operated at a low frequency.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0027] Figure 1 A structural schematic diagram of an adjustable liquid dispenser provided in Embodiment 1 of the present invention (non-working state);

[0028] Figure 2 A schematic structural diagram of an adjustable liquid dispenser provided in Embodiment 1 of the present invention (the second movable air intake pipe is in working state);

[0029] Figure 3 A schematic diagram of the structure of an adjustable liquid dispenser provided in Embodiment 1 of the present invention (the first movable air intake pipe is in working state);

[0030] Figure 4A schematic diagram of the structure of a first movable air intake pipe in an adjustable liquid dispenser provided in Embodiment 1 of the present invention;

[0031] Figure 5 A schematic diagram of the structure of a compressor provided in Embodiment 1 of the present invention;

[0032] Figure 6 A schematic diagram of the structure of an adjustable liquid dispenser provided in Embodiment 2 of the present invention;

[0033] Figure 7 This is a schematic structural diagram of an adjustable liquid dispenser provided in Example 3 of the present invention.

[0034] Reference numerals

[0035] 1. Intake structure; 11. Fixed intake pipe; 111. Oil return hole; 12. First movable intake pipe; 121. Casing part; 122. Expanded pipe part; 1221. Oil unloading hole; 13. Second movable intake pipe; 2. Adjustable liquid distributor; 21. Liquid distributor tank; 211. Intake port; 22. Exhaust pipe; 221. Pressure sensor; 222. Temperature sensor; 23. Filter bracket; 24. Filter; 3. Compressor pump body; 12A. First movable intake pipe; 12B; First movable intake pipe. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Embodiment 1

[0043] like Figures 1 to 4 As shown, an embodiment of the present invention provides an air intake structure 1, including a fixed air intake pipe 11, a first movable air intake pipe 12 and a second movable air intake pipe 13, the first movable air intake pipe 12 is movably arranged with the fixed air intake pipe 11 and is communicated with the fixed air intake pipe 11; the second movable air intake pipe 13 is movably arranged with the fixed air intake pipe 11 and is communicated with the fixed air intake pipe 11; wherein, the diameter of the gas inlet of the first movable air intake pipe 12 is larger than the diameter of the gas inlet of the second movable air intake pipe 13.

[0044] During actual use, the first movable intake pipe 12 and the second movable intake pipe 13 are switched to be used in conjunction with the fixed intake pipe 11 to achieve gas guidance. Since the calibers of the gas inlets of the first movable intake pipe 12 and the second movable intake pipe 13 are different, the relatively large caliber can introduce more gas to increase the intake volume and reduce the intake resistance, thereby effectively solving the problem of insufficient intake volume of the compressor during high-frequency operation, while the relatively small caliber can reduce the introduction of gas to reduce the intake volume and increase the intake resistance, thereby effectively solving the problem of intake liquid during low-frequency operation of the compressor.

[0045] In one embodiment, the fixed air intake duct 11 , the first movable air intake duct 12 and the second movable air intake duct 13 are coaxially arranged, the first movable air intake duct 12 can move axially relative to the fixed air intake duct 11 , and the second movable air intake duct 13 can move axially relative to the fixed air intake duct 11 .

[0046] like Figures 1 to 3 As shown, the first movable air intake pipe 12 is arranged outside the fixed air intake pipe 11, and the second movable air intake pipe 13 is arranged inside the fixed air intake pipe 11. The coaxial arrangement method is adopted to save space while meeting functional requirements.

[0047] By adjusting the first movable air intake pipe 12 to an effective air intake position by axial movement, the problem of insufficient air intake of the compressor during high-frequency operation can be effectively solved. Correspondingly, by adjusting the second movable air intake pipe 13 to an effective air intake position by axial movement, the problem of liquid in the air intake during low-frequency operation of the compressor can be effectively solved.

[0048] It should be noted that only one of the first movable air intake pipe 12 and the second movable air intake pipe 13 is in an effective air intake position, and both should not be in the effective air intake position at the same time. That is, when the first movable air intake pipe 12 is in an effective air intake position, the second movable air intake pipe 13 is not in an effective air intake position. Similarly, when the second movable air intake pipe 13 is in an effective air intake position, the first movable air intake pipe 12 is not in an effective air intake position.

[0049] In one embodiment, both the fixed air intake pipe 11 and the second movable air intake pipe 13 are straight pipe structures. The straight pipe structure is simple in design and facilitates the second movable air intake pipe 13 to move relative to the fixed air intake pipe 11. At the same time, it reduces flow resistance and improves gas delivery efficiency.

[0050] In one embodiment, the first movable air intake pipe 12 includes a sleeve portion 121 and a flared pipe portion 122 . The sleeve portion 121 is movably sleeved on the periphery of the fixed air intake pipe 11 . The flared pipe portion 122 is coaxially arranged with the sleeve portion 121 and is located on the periphery of the sleeve portion 121 .

[0051] like Figure 4 As shown, the sleeve portion 121 is a cylindrical structure, which is movably sleeved on the periphery of the fixed air intake pipe 11. The main function of the sleeve portion 121 is to provide fixed support to prevent the first movable air intake pipe 12 from tilting or shaking during operation. To this end, the inner diameter of the sleeve portion 121 is precisely matched with the outer diameter of the fixed air intake pipe 11 to ensure its stability during axial sliding. The expanded pipe portion 122 is coaxially arranged on the outside of the sleeve portion 121 and consists of two parts, the inner diameter of the upper section remains unchanged from top to bottom, providing a stable inlet diameter, and the inner diameter of the lower section gradually decreases from top to bottom. The structural design of the upper and lower parts effectively increases the cross-sectional area for gas entry, can inhale more gas, and at the same time reduce the inhalation resistance and improve the overall inhalation efficiency.

[0052] In one embodiment, the first movable air intake pipe 12 is provided with an oil discharge hole 1221 , and the fixed air intake pipe 11 is provided with an oil return hole 111 . The oil discharge hole 1221 is communicated with the oil return hole 111 .

[0053] like Figure 1 As shown, the oil unloading hole 1221 is arranged on the flared tube portion 122 of the first active intake pipe 12, and is located at a position close to the bottom of the lower section of the flared tube portion 122. In actual use, the oil unloading hole 1221 serves to discharge the oil collected in the first active intake pipe 12 to the bottom of the liquid separator, so that the refrigerant oil further returns to the bottom of the compressor pump body 3 through the oil return hole 111.

[0054] In one embodiment, a first limiting structure for preventing the first movable air intake pipe 12 from detaching from the fixed air intake pipe 11 is provided between the first movable air intake pipe 12 and the fixed air intake pipe 11, and a second limiting structure for preventing the second movable air intake pipe 13 from detaching from the fixed air intake pipe 11 is provided between the second movable air intake pipe 13 and the fixed air intake pipe 11.

[0055] Specifically, the first limiting structure can be a ring-shaped, dot-shaped, rectangular-shaped or other protruding structure arranged on the inner side of the first movable air intake pipe 12 and the outer side of the fixed air intake pipe 11. Specifically, a protrusion is arranged on the inner side of the sleeve portion 121 of the first movable air intake pipe 12, and a protrusion is also arranged on the outer side of the fixed air intake pipe 11 near its top. When the first movable air intake pipe 12 slides to the predetermined position of the fixed air intake pipe 11, the two ring-shaped protrusions conflict with each other, thereby achieving a limiting effect.

[0056] Similarly, the design principle of the second limiting structure is similar to that of the first limiting structure. Specifically, a protrusion is set on the outer side surface of the second movable air intake pipe 13 near its bottom end, and a protrusion is also set on the inner side surface of the fixed air intake pipe 11 near its top end. When the second movable air intake pipe 13 slides to the predetermined position of the fixed air intake pipe 11, the two annular protrusions interfere with each other, thereby achieving a limiting effect.

[0057] In one embodiment, the air intake structure 1 further includes a moving driving structure, and the moving driving structure is used to drive the first movable air intake pipe 12 and the second movable air intake pipe 13 to move relative to the fixed air intake pipe 11 .

[0058] The mobile drive structure can specifically be a hinge stretching, magnetic attraction / repulsion type, direct push-pull type and other structures. For example, a magnetic attraction / repulsion type design is adopted, and a magnet is specifically provided on the first movable air intake pipe 12 with the N pole facing downward, and a magnet is provided on the second movable air intake pipe 13 with the S pole facing downward. An electromagnetic coil is provided on the fixed air intake pipe 11, and is located below the magnets provided on the first movable air intake pipe 12 and the second movable air intake pipe 13. When a positive current is passed, the magnetic field generated by the electromagnetic coil has the N pole facing upward, and when a negative current is passed, the magnetic field generated by the electromagnetic coil has the S pole facing upward. When a positive current is passed through the electromagnetic coil and its N pole faces upward, according to the principle that like charges attract and opposite charges repel, the first movable air intake pipe 12 will move upward and the second movable air intake pipe 13 will move downward, thereby forming a state in which the first movable air intake pipe 12 is above and the second movable air intake pipe 13 is below, that is, Figure 3 In this state, the first movable air intake pipe 12 is located at the effective air intake position to guide the gas into the fixed air intake pipe 11. Similarly, when the electromagnetic coil is passed through a negative current, the first movable air intake pipe 12 is at the bottom and the second movable air intake pipe 13 is at the top, that is, Figure 2 In this state, the second movable air intake pipe 13 is located at the effective air intake position to guide the gas into the fixed air intake pipe 11. In addition, when the electromagnetic coil is powered off, the first movable air intake pipe 12 and the second movable air intake pipe 13 are not affected by the electromagnetic coil. Due to the action of gravity, they are both at the bottom, that is, Figure 1 In the state shown, the first movable air intake pipe 12 and the second movable air intake pipe 13 are not used to guide the gas into the fixed air intake pipe 11.

[0059] Through the above-mentioned magnetic attraction / repulsion type mobile driving structure, the positions of the first movable air intake pipe 12 and the second movable air intake pipe 13 can be quickly switched in a linkage manner. There is no need to set up two sets of structures to control the movement of the first movable air intake pipe 12 and the second movable air intake pipe 13, thereby simplifying the structure.

[0060] An embodiment of the present invention also provides an adjustable liquid distributor 2, including a liquid separator tank 21, a filter bracket 23, a filter screen 24, and the above-mentioned air intake structure 1. The top of the liquid separator tank 21 is provided with an air intake port 211 for the entry and exit of gas. The filter bracket 23, the filter screen 24 and the air intake structure 1 are arranged in the liquid separator tank 21, and the gas inlet ends of the first active air intake pipe 12 and the second active air intake pipe 13 are arranged close to the air intake port 211.

[0061] like Figures 1 to 3As shown, the filter bracket 23 is fixed in the liquid separator 21 to ensure that the filter 24 can be stably fixed in the liquid separator 21. The filter 24 is installed on the filter bracket 23 and is located below the air inlet 211. The air inlet structure 1 is installed below the air inlet 211. The gas inlet end of the first movable air inlet pipe 12 moves toward the arrangement direction close to the air inlet 211 to reach the effective air inlet position for operation. Similarly, the gas inlet end of the second movable air inlet pipe 13 moves toward the arrangement direction close to the air inlet 211 to reach the effective air inlet position for operation.

[0062] In one embodiment, the adjustable liquid distributor 2 further includes an air outlet pipe 22 , and the air outlet pipe 22 is connected to the fixed air intake pipe 11 .

[0063] like Figure 1 , Figure 5 As shown, the air outlet pipe 22 is passed through the bottom of the liquid separator tank 21, the part of the air outlet pipe 22 located in the liquid separator tank 21 is connected to the lower end of the fixed suction pipe 11, and the part of the air outlet pipe 22 located in the liquid separator tank 21 is connected to the compressor pump body 3. The gas entering from the suction port 211 first passes through the filter screen 24, and then is guided to the fixed suction pipe 11 through the first movable suction pipe 12 or the second movable suction pipe 13, and then transported from the air outlet pipe 22 to the compressor pump body 3.

[0064] In one embodiment, the adjustable liquid distributor 2 further includes a pressure sensor 221 and a temperature sensor 222 . The pressure sensor 221 is used to detect pressure data of the refrigerant in the air outlet pipe 22 , and the temperature sensor 222 is used to detect temperature data of the refrigerant in the air outlet pipe 22 .

[0065] Through the real-time monitored pressure data and temperature data, the superheat of the refrigerant input into the compressor pump body 3 at the outlet pipe 22 of the adjustable liquid distributor 2 can be calculated, and the decision to switch the first active intake pipe 12 or the second active intake pipe 13 to guide the gas is made by judging the superheat.

[0066] like Figure 5 As shown, the pressure sensor 221 and the temperature sensor 222 are arranged at the end of the outlet pipe 22, that is, close to the position where the outlet pipe 22 is connected to the compressor pump body 3, so that the superheat of the refrigerant input to the compressor pump body 3 can be obtained more accurately.

[0067] like Figure 5 As shown, an embodiment of the present invention further provides a compressor, including the above-mentioned adjustable liquid distributor 2, and the end of the air outlet pipe 22 of the adjustable liquid distributor 2 is connected to the compressor pump body 3. Except for the above-mentioned adjustable liquid distributor 2, the remaining structures of the compressor can be the same as those in the prior art, and the remaining structures are not described in detail here.

[0068] The embodiment of the present invention further provides a method for adjusting the air intake volume, comprising the following steps: S10-S40.

[0069] S10, collecting pressure data and temperature data of the refrigerant in the outlet pipe 22.

[0070] Specifically, the pressure sensor 221 and the temperature sensor 222 installed at the end of the air outlet pipe 22 are used to collect the pressure data and temperature data of the refrigerant in real time. The collection frequency can be set according to demand, for example, once per second to ensure real-time performance.

[0071] S20. Calculate the superheat of the refrigerant according to the pressure data and the temperature data.

[0072] The superheat here is defined as the difference between the actual temperature of the refrigerant and its saturation temperature at the same pressure. The calculation process is as follows: by consulting the pressure-temperature relationship table of the refrigerant, determine the saturation temperature at the corresponding pressure.

[0073] Calculate superheat: superheat = actual temperature - saturation temperature.

[0074] S30 , if the superheat of the refrigerant in the outlet pipe 22 is greater than the set threshold, the position of the first movable air intake pipe 12 is adjusted to guide the gas into the fixed air intake pipe 11 by using the first movable air intake pipe 12 .

[0075] The set threshold may be a pre-set safety threshold. For example, in the present embodiment, the set threshold is 1°C. The position of the first active intake pipe 12 and the second active intake pipe 13 is adjusted by judging whether the compressor superheat is greater than 1°C.

[0076] When the calculated superheat is greater than 1°C, it indicates that the compressor pump body 3 has a working state of the liquid distributor when the suction port 211 is overheated. It is necessary to transport as much refrigerant as possible from the suction port 211 to the compressor pump body 3. Therefore, the first movable suction pipe 12 is adjusted to the effective air intake position by moving the driving structure, that is, Figure 3 The position shown in the figure can increase the suction volume and reduce the suction resistance, thus effectively solving the problem of insufficient suction volume of the compressor during high-frequency operation.

[0077] S40 , if the superheat of the refrigerant in the outlet pipe 22 is less than the set threshold, the position of the second movable air intake pipe 13 is adjusted to guide the gas into the fixed air intake pipe 11 by using the second movable air intake pipe 13 .

[0078] When the superheat is less than 1°C, it indicates that the suction volume of the refrigerant may be too much, and the suction volume needs to be reduced to optimize the operation of the compressor. Therefore, the second movable suction pipe 13 is adjusted to the effective air intake position by moving the driving structure, that is, Figure 2The position shown in the figure can reduce the suction volume and increase the suction resistance, thereby effectively solving the problem of suction liquid when the compressor runs at low frequency.

[0079] Embodiment 2

[0080] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that the structure of the first movable air intake pipe 12A is different. Specifically, the expanded pipe portion of the first movable air intake pipe 12A is roughly in a trapezoidal shape with a wide top and a narrow bottom, and the diameter of the gas inlet at the upper end of the expanded pipe portion is larger than the diameter of the gas inlet at the second movable air intake pipe.

[0081] Embodiment 3

[0082] like Figure 7 As shown, the difference between this embodiment and the first embodiment is that the structure of the first movable air intake pipe 12B is different. Specifically, the expanded pipe portion of the first movable air intake pipe 12B is roughly T-shaped, and the diameter of the gas inlet at the upper end of the expanded pipe portion is larger than the diameter of the gas inlet at the second movable air intake pipe.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An air intake structure, characterized in that: include: Fixed air intake pipe; a first movable air intake pipe, movably arranged with the fixed air intake pipe and communicated with the fixed air intake pipe; a second movable air intake pipe, movably arranged with the fixed air intake pipe and communicated with the fixed air intake pipe; Wherein, the diameter of the gas inlet of the first movable air intake pipe is larger than the diameter of the gas inlet of the second movable air intake pipe.

2. An air intake structure according to claim 1, characterized in that: The fixed air intake duct, the first movable air intake duct and the second movable air intake duct are coaxially arranged, the first movable air intake duct can move axially relative to the fixed air intake duct, and the second movable air intake duct can move axially relative to the fixed air intake duct.

3. An air intake structure according to claim 2, characterized in that: The first movable air intake pipe is arranged on the outer side of the fixed air intake pipe, and the second movable air intake pipe is arranged on the inner side of the fixed air intake pipe.

4. The air intake structure according to claim 1, characterized in that: The first movable air intake pipe comprises a sleeve portion and a flared pipe portion, the sleeve portion is movably sleeved on the periphery of the fixed air intake pipe, the flared pipe portion is coaxially arranged with the sleeve portion, and the flared pipe portion is located on the periphery of the sleeve portion.

5. The air intake structure according to claim 1, characterized in that: A first limiting structure for preventing the first movable air intake pipe from being separated from the fixed air intake pipe is provided between the first movable air intake pipe and the fixed air intake pipe, and a second limiting structure for preventing the second movable air intake pipe from being separated from the fixed air intake pipe is provided between the second movable air intake pipe and the fixed air intake pipe.

6. The air intake structure according to claim 1, characterized in that: It also includes a moving drive structure, which is used to drive the first movable air intake pipe and the second movable air intake pipe to move relative to the fixed air intake pipe.

7. An adjustable liquid dispenser, characterized in that: It comprises a liquid separation tank and an air intake structure as described in any one of claims 1 to 6, wherein the liquid separation tank is provided with an air intake port, the air intake structure is arranged in the liquid separation tank, and the gas inlet ends of the first movable air intake pipe and the second movable air intake pipe are both arranged close to the air intake port.

8. An adjustable liquid dispenser according to claim 7, characterized in that: It also includes a pressure sensor and a temperature sensor. The pressure sensor is used to detect the pressure data of the refrigerant in the outlet pipe, and the temperature sensor is used to detect the temperature data of the refrigerant in the outlet pipe.

9. A compressor, characterized in that: An adjustable dispenser comprising any one of claims 7-8.

10. A method for adjusting the amount of air intake, characterized in that: include: Collect the pressure and temperature data of the refrigerant in the outlet pipe; Calculate the superheat of the refrigerant based on the pressure data and temperature data; If the superheat of the refrigerant in the outlet pipe is greater than a set threshold, the position of the first movable air intake pipe is adjusted to guide the gas into the fixed air intake pipe by using the first movable air intake pipe; If the superheat of the refrigerant in the outlet pipe is less than a set threshold, the position of the second movable air intake pipe is adjusted to use the second movable air intake pipe to guide the gas into the fixed air intake pipe.

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