Capillary throttling device, air conditioner and control method thereof

Abstract

The application provides a capillary throttling device, an air conditioner and a control method thereof. The capillary throttling device comprises a valve seat, a first capillary group and a second capillary group connected to the two side walls of the valve seat, and each capillary group comprises a plurality of capillary tubes; a cylindrical valve core has a flow channel group comprising a plurality of flow channels; the cylindrical valve core can be driven to rotate at different angles, so that, at an angle, one capillary tube in the first capillary group and one capillary tube in the second capillary group are connected through one flow channel in the flow channel group to form a capillary throttling flow channel, and, at the angle, the first capillary group and the second capillary group are not connected to other capillary tubes, respectively; at each angle, the flow rate of each capillary throttling flow channel formed by connection is different. The application can realize adaptive adjustment of different load operation conditions of the air conditioner, thereby meeting different operation requirements of the air conditioner, and the product has high reliability.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a capillary throttling device, an air conditioner, and a control method thereof. Background Technology

[0002] Capillary tubes, as a common throttling component in small refrigeration systems, utilize the flow resistance encountered by the refrigerant within a slender pipe to achieve the effect of throttling the refrigerant. The main functions of capillary tubes include: throttling and reducing the pressure of the high-pressure refrigerant exiting the condenser; and balancing the refrigerant pressure within the system piping when the air conditioner is off.

[0003] The main advantages of existing capillary throttling components are their simple, reliable, and inexpensive structure. However, since traditional capillary components do not have electrical control components, after being assembled in an air conditioner, they can only achieve the best throttling effect under certain operating loads / conditions, resulting in poor adaptability and a lack of self-adjustment capabilities.

[0004] In practical applications, such as engineering units (e.g., computer room air conditioners), dehumidifiers, and ice makers, which do not have high temperature control requirements but need to meet various loads, a single capillary tube device is insufficient to meet their operational needs, reducing product reliability. Replacing the capillary tube with a throttling device, on the other hand, increases the product's manufacturing cost. Based on the aforementioned shortcomings, this invention is proposed. Summary of the Invention

[0005] Therefore, the present invention provides a capillary throttling device, an air conditioner and its control method, which can solve the technical problems in the prior art where capillary tubes cannot adapt to the multi-load operating conditions of air conditioners, making it difficult to meet operating requirements and resulting in low product reliability.

[0006] To address the above problems, the present invention provides a capillary throttling device, comprising:

[0007] A valve seat having a central hole with a circular cross-section, a first capillary group connected to a first sidewall of the valve seat, and a second capillary group connected to a second sidewall of the valve seat, wherein the first capillary group includes multiple capillary tubes and the second capillary group includes multiple capillary tubes.

[0008] A cylindrical valve core is assembled in the central hole. The cylindrical valve core has a flow channel assembly, which includes multiple flow channels.

[0009] The cylindrical valve core can be driven to rotate at different angles, such that at one angle, one capillary in the first capillary group and one capillary in the second capillary group are connected through one of the flow channels in the flow channel group to form a capillary flow channel, and at this angle, the other capillary tubes in the first capillary group and the second capillary group are not connected. The throttling flow rate of each of the connected capillary flow channels is different at each angle.

[0010] In some implementations...

[0011] The direction of the central axis from the first end to the second end of the central hole is defined as the first direction. Each capillary in the first capillary group and each capillary in the second capillary group are spaced apart along the first direction. The flow diameter of each capillary in the first capillary group increases sequentially along the first direction, and the flow diameter of each capillary in the second capillary group increases sequentially along the first direction. The number of capillary in the first capillary group is equal to the number of capillary in the second capillary group. Along the first direction, capillary with the same position has the same flow diameter. Each flow channel in the flow channel group is spaced apart along the first direction, and the number is equal to the number of capillary in the first capillary group. Each flow channel corresponds to the position of each capillary in the first capillary group and each capillary in the second capillary group.

[0012] In some implementations...

[0013] The valve seat is an integral valve seat; or,

[0014] The valve seat is formed by combining a left valve seat and a right valve seat. The first capillary assembly is disposed on the left valve seat, and the second capillary assembly is disposed on the right valve seat.

[0015] In some implementations...

[0016] The ends of each capillary tube in the first capillary tube group that are away from the first sidewall converge into a first confluence tube, and the ends of each capillary tube in the second capillary tube group that are away from the second sidewall converge into a second confluence tube. The first confluence tube is provided with a first detection component for detecting the pressure and temperature of the refrigerant inside it, and the second confluence tube is provided with a second detection component for detecting the pressure and temperature of the refrigerant inside it.

[0017] In some embodiments, the capillary throttling device further includes a sealing housing fitted onto the outside of the valve seat.

[0018] In some embodiments, the capillary throttling device further includes a rotary drive component, which includes an electromagnetic coil that generates magnetic force when energized to drive the cylindrical valve core to rotate.

[0019] In some implementations...

[0020] The valve seat and the cylindrical valve core are threaded together. The distance between each capillary in the first capillary group in the first direction is L. The distance between each capillary in the second capillary group in the first direction is also L. Along the first direction, the first capillary in the first capillary group and the first capillary in the second capillary group have a height difference of h. Each flow channel is inclined along the first direction to accommodate the height difference.

[0021] The present invention also provides an air conditioner, including an evaporator and a condenser, wherein the above-mentioned capillary throttling device is provided on the refrigerant pipeline between the evaporator and the condenser.

[0022] The present invention also provides a control method for an air conditioner as described above, comprising the following steps:

[0023] Obtain the execution command;

[0024] When the operating command is an air conditioner start command, the cylindrical valve core of the capillary throttling device is controlled to be in the initial position. In the initial position, the first capillary in the first capillary group is connected to the first capillary in the second capillary group through the first flow passage in the cylindrical valve core.

[0025] Obtain the real-time input pressure Pin and real-time input temperature Tin of the refrigerant in the first confluence pipe, and the real-time output pressure Pout and real-time output temperature Tout of the refrigerant in the second confluence pipe.

[0026] Based on the relationship between the real-time input pressure Pin or real-time output pressure Pout and the pressure range, the real-time input temperature Tin or real-time output temperature Tout and the temperature range, |Pin-Pout| and the pressure difference range, and |Tin-Tout| and the temperature difference range, the rotation angle of the cylindrical valve core is controlled, thereby adjusting the cylindrical valve core from the initial position to the target position or maintaining it at the initial position. When the cylindrical valve core is at the target position, the throttling flow rate of the capillary tube and the flow channel formed by the corresponding connection is not equal to the throttling flow rate of the capillary flow channel formed when it is at the initial position.

[0027] In some implementations...

[0028] The pressure range includes multiple pressure intervals from high to low, the temperature range includes multiple temperature intervals from high to low, the pressure difference range includes multiple pressure difference intervals from high to low, and the temperature difference range includes multiple temperature difference intervals from high to low.

[0029] When the real-time input pressure Pin or the real-time output pressure Pout is not lower than the higher range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not lower than the higher range among the multiple temperature ranges, and |Pin-Pout| is not lower than the higher range among the multiple differential pressure ranges, and |Tin-Tout| is not lower than the higher range among the multiple temperature difference ranges, the capillary with the smaller throttling flow rate is controlled to be connected by the cylindrical valve core; or when the throttling flow rate of the capillary with the cylindrical valve core in the initial position is the smallest among the throttling flow rates of all formed capillary with the smaller throttling flow rates, the cylindrical valve core is controlled to remain in the initial position; or...

[0030] When the real-time input pressure Pin or the real-time output pressure Pout is not higher than the lower range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not higher than the lower range among the multiple temperature ranges, and |Pin-Pout| is not higher than the lower range among the multiple differential pressure ranges, and |Tin-Tout| is not higher than the higher range among the multiple temperature difference ranges, the capillary with a larger throttling flow rate is controlled to be connected to the capillary flow channel formed by the cylindrical valve core; or when the throttling flow rate of the capillary flow channel formed by the cylindrical valve core in the initial position is the largest among the throttling flow rates of all formed capillary flow channels, the cylindrical valve core is controlled to remain in the initial position; or...

[0031] When the real-time input pressure Pin or the real-time output pressure Pout is in the middle of the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is in the middle of the multiple temperature ranges, and |Pin-Pout| is in the middle of the multiple differential pressure ranges and |Tin-Tout| is in the middle of the multiple temperature difference ranges, the cylindrical valve core is controlled to remain in the initial position.

[0032] In some implementations...

[0033] When the capillary flow channel formed by the cylindrical valve core is connected to a capillary with a small throttling flow rate, the higher the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the higher the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the higher the pressure difference range of |Pin-Pout|, and the higher the temperature difference range of |Tin-Tout|, the greater the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position; or,

[0034] When controlling the capillary flow channel formed by the cylindrical valve core to have a larger throttling flow rate, the lower the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the lower the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the lower the pressure difference range of |Pin-Pout|, and the lower the temperature difference range of |Tin-Tout|, the larger the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position.

[0035] In some embodiments, when the operating command is an air conditioner start-up command, the method further includes: before controlling the cylindrical valve core of the capillary throttling device to be in the initial position:

[0036] The valve core self-test step involves controlling the rotation drive component to drive the cylindrical valve core to rotate first towards the first end of the central hole, and then driving the cylindrical valve core to rotate in the opposite direction towards the second end of the central hole. The displacement of the cylindrical valve core is monitored. After the cylindrical valve core has been moved to the first end and the second end in succession, the control drives the cylindrical valve core to move to the initial position. If the cylindrical valve core fails to be moved to the first end and the second end in succession, an abnormal status warning for the throttling device is issued.

[0037] The capillary throttling device, air conditioner, and control method provided by this invention have the following beneficial effects:

[0038] In this technical solution, a first capillary group and a second capillary group, each with multiple capillary tubes, are respectively set on both sides of the valve seat. By rotating the cylindrical valve core, selective conduction is achieved on a pair of capillary tubes with the same flow diameter on both sides, thereby forming multiple capillary flow channels that correspond one-to-one with different rotation angles. The throttling flow of each capillary flow channel is different, thus enabling adaptive adjustment to different load operating conditions of the air conditioner, thereby meeting the different operating needs of the air conditioner. The product has high reliability, and since it does not require the use of throttling elements in existing technologies, it can reduce product costs. Attached Figure Description

[0039] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the internal structure of the capillary throttling device according to an embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A schematic diagram of the capillary throttling device with some components omitted;

[0042] Figure 3 This is a schematic diagram of the control system framework of the capillary throttling device according to an embodiment of the present invention, wherein the sensor module specifically comprises a first detection component and a second detection component, and the actuator module specifically comprises a capillary throttling device;

[0043] Figure 4 This is a schematic diagram of the control logic of a specific embodiment of the control method of the present invention;

[0044] Figure 5 This is a schematic diagram showing the position of the cylindrical valve core of the capillary throttling device in working position ① in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram showing the position of the cylindrical valve core of the capillary throttling device in working position ② in an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram showing the position of the cylindrical valve core of the capillary throttling device in working position ③ in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram showing the position of the cylindrical valve core of the capillary throttling device in the working position ④ in an embodiment of the present invention.

[0048] The attached figures are labeled as follows:

[0049] 1. Valve seat; 11. Left valve seat; 12. Right valve seat; 2. Cylindrical valve core; 21. Flow channel; 31. First confluence pipe; 32. Second confluence pipe; 4. Electromagnetic coil; 51. First detection component; 52. Second detection component; 6. Sealing housing. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0054] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a capillary throttling device is provided, comprising:

[0055] Valve seat 1 has a central hole (not indicated in the figure) with a circular cross-section. A first capillary assembly (not indicated in the figure, for example) is connected to the first sidewall of valve seat 1. Figure 1 (As shown, capillary tubes 1 to 4 are on the left side). A second capillary tube group (not labeled in the figure, e.g.) is connected to the second side wall of the valve seat 1. Figure 1 The capillaries 1 to 4 shown on the right side are shown. The first capillary group includes multiple capillaries, and the second capillary group includes multiple capillaries.

[0056] The cylindrical valve core 2 is assembled in the central hole. It is understood that the cylindrical valve core 2 and the central hole are adapted in shape and size. The cylindrical valve core 2 has a flow channel assembly, which includes multiple flow channels 21.

[0057] The cylindrical valve core 2 can be driven to rotate at different angles, such that at one angle, one capillary in the first capillary group and one capillary in the second capillary group are connected through one flow channel 21 in the flow channel group to form a capillary flow channel. At this angle, other capillaries in the first and second capillary groups are not connected. The throttling capacity of each connected capillary flow channel is different at each angle. That is, at each preset angle of rotation, only one capillary on the left and one capillary on the right are connected through one flow channel 21, while the other capillaries are in a state of left and right cut-off. See details. Figure 1 As shown, when the left capillary 1 is connected to the right capillary 1, the remaining capillaries on the left are not connected to the remaining capillaries on the right. When the left capillary 2 is connected to the right capillary 2, the remaining capillaries on the left are not connected to the remaining capillaries on the right, and so on.

[0058] In this technical solution, a first capillary group and a second capillary group, each with multiple capillary tubes, are respectively set on both sides of the valve seat 1. By rotating the cylindrical valve core 2, selective conduction is achieved on a pair of capillary tubes with the same flow diameter on both sides, thereby forming multiple capillary flow channels that correspond one-to-one with different rotation angles. The throttling flow of each capillary flow channel is different, thus enabling adaptive adjustment to different load operating conditions of the air conditioner, thereby meeting the different operating needs of the air conditioner. The product has high reliability, and since it does not require the use of throttling elements in existing technologies, it can reduce product costs.

[0059] In one feasible embodiment, the flow diameters of each capillary in the first capillary group and the second capillary group are respectively equal and correspond one-to-one. Specifically, see [link to relevant documentation]. Figure 1The structure shown has four capillary tubes. The aforementioned one-to-one correspondence means that the flow diameter of the left capillary tube 1 is equal to that of the right capillary tube 1, the flow diameter of the left capillary tube 2 is equal to that of the right capillary tube 2, and so on. Thus, when the left capillary tube 1 and the right capillary tube 1 are connected, a capillary flow channel with one flow diameter is formed. When the left capillary tube 2 and the right capillary tube 2 are connected, a capillary flow channel with another flow diameter is formed, and so on. Since the flow diameters of each capillary flow channel are different, different flow rates are formed. Of course, capillary tubes with equal flow diameters can also be used, but different lengths can be used to achieve different flow rate settings.

[0060] See further Figure 1 As shown, the direction of the central axis from the first end to the second end of the central hole is defined as the first direction. Each capillary in the first capillary group and each capillary in the second capillary group are spaced apart along the first direction. The flow diameter of each capillary in the first capillary group increases sequentially along the first direction, and the flow diameter of each capillary in the second capillary group increases sequentially along the first direction. The number of capillary in the first capillary group is equal to the number of capillary in the second capillary group. Along the first direction, the flow diameter of capillary of the same position is equal. Each flow channel 21 in the flow channel group is spaced apart along the first direction, and the number is equal to the number of capillary in the first capillary group. Each flow channel 21 corresponds to the position of each capillary in the first capillary group and each capillary in the second capillary group.

[0061] In this technical solution, the flow diameter of each capillary in the first and second capillary groups is designed to increase sequentially along a first direction. For example, when the cylindrical valve core 2 is placed vertically, the flow diameter of each capillary increases from high to low, and decreases from low to high. This unidirectional increase and decrease in flow diameter, along with the one-to-one correspondence between each flow channel 21 and the number of capillary tubes in each capillary group, simplifies the control of the cylindrical valve core 2. It is understood that the flow diameter of each flow channel 21 can be a set value, preferably equal to the flow diameter of the capillary at the corresponding connection position.

[0062] In one specific embodiment, the aforementioned valve seat 1 can be an integral valve seat, that is, the valve seat 1 is objectively a cylindrical structure, which can reduce the number of components to be assembled, thereby reducing the assembly difficulty; or, in another feasible embodiment, the valve seat 1 is formed by combining a left valve seat 11 and a right valve seat 12, with the first capillary group disposed on the left valve seat 11 and the second capillary group disposed on the right valve seat 12. The split valve seat structure facilitates the rapid maintenance of the cylindrical valve core 2.

[0063] The ends of each capillary tube in the first capillary group that are away from the first sidewall converge at the first confluence pipe 31, and the ends of each capillary tube in the second capillary group that are away from the second sidewall converge at the second confluence pipe 32. The first confluence pipe 31 is provided with a first detection component 51 for detecting the pressure and temperature of the refrigerant inside, and the second confluence pipe 32 is provided with a second detection component 52 for detecting the pressure and temperature of the refrigerant inside. The aforementioned first detection component 51 and second detection component 52 can be a combination of a temperature sensor and a pressure sensor or an integrated detection module for detecting temperature and pressure.

[0064] In this technical solution, by detecting the real-time pressure and temperature of the refrigerant at the first confluence pipe 31 and the second confluence pipe 32, it is beneficial to adaptively and automatically adjust the position of the cylindrical valve core 2 of the capillary throttling device.

[0065] In some embodiments, the capillary throttling device further includes a sealing housing 6, which is fitted onto the outside of the valve seat 1, and the aforementioned sealing housing 6 can effectively prevent refrigerant leakage.

[0066] It is understood that the capillary throttling device also includes a rotary drive component, which can specifically be a stepper motor. The stepper motor's shaft is coaxially connected to the cylindrical valve core 2, thus driving the cylindrical valve core 2 to rotate synchronously when the stepper motor operates. In a preferred embodiment, the rotary drive component includes an electromagnetic coil 4. It is understood that a corresponding magnetic material (e.g., a permanent magnet) is provided at the axial section of the cylindrical valve core 2 that matches its position, so that magnetic force is generated when the electromagnetic coil 4 is energized to drive the cylindrical valve core 2 to rotate. The electromagnetic coil 4 can be specifically assembled at the end of the valve seat 1, thereby reducing the manufacturing cost of the capillary throttling device.

[0067] In a preferred embodiment, the valve seat 1 and the cylindrical valve core 2 are threadedly connected. The distance between each capillary in the first capillary group in the first direction is L, and the distance between each capillary in the second capillary group in the first direction is also L. Along the first direction, the first capillary in the first capillary group and the first capillary in the second capillary group have a height difference of h. Each flow channel 21 is inclined along the first direction to accommodate the height difference.

[0068] In this technical solution, the cylindrical valve core 2 and the valve seat 1 are connected by threads. That is, an external thread is constructed on the outer circumferential wall of the cylindrical valve core 2 and an internal thread is constructed on the hole wall of the central hole of the valve seat 1. Through the threaded connection, the cylindrical valve core 2 can be moved up and down when it is driven to rotate, thereby realizing the displacement movement of the cylindrical valve core 2. This enables the adaptive adjustment of the valve core position and selective connection of capillary tubes with different flow diameters. At the same time, the threaded connection also helps to seal the refrigerant between the cylindrical valve core 2 and the valve seat 1, thereby ensuring that the refrigerant can flow more smoothly in the corresponding connected capillary tube and flow channel 21.

[0069] According to an embodiment of the present invention, an air conditioner is also provided, including an evaporator and a condenser, wherein the above-mentioned capillary throttling device is provided on the refrigerant pipeline between the evaporator and the condenser. Specifically, the first confluence pipe 31 is located between the condenser and the first capillary tube group, and the second confluence pipe 32 is located between the evaporator and the second capillary tube group.

[0070] According to an embodiment of the present invention, a control method for an air conditioner as described above is also provided, comprising the following steps:

[0071] Obtain the execution command;

[0072] When the operating command is an air conditioner start-up command, the cylindrical valve core 2 of the capillary throttling device is controlled to be in the initial position. In the initial position, the first capillary in the first capillary group is connected to the first capillary in the second capillary group through the first flow channel in the cylindrical valve core 2. It should be noted that the aforementioned initial position is for different operating conditions (different loads) of the air conditioner, and the throttling flow of the capillary flow channel formed by the specific connected capillary is different.

[0073] The real-time input pressure Pin and real-time input temperature Tin of the refrigerant in the first confluence pipe 31 and the real-time output pressure Pout and real-time output temperature Tout of the refrigerant in the second confluence pipe 32 are obtained.

[0074] Based on the relationship between the real-time input pressure Pin or real-time output pressure Pout and the pressure range, the real-time input temperature Tin or real-time output temperature Tout and the temperature range, |Pin-Pout| and the pressure difference range, and |Tin-Tout| and the temperature difference range, the rotation angle of the cylindrical valve core 2 is controlled, thereby adjusting the cylindrical valve core 2 from the initial position to the target position or keeping it at the initial position. When the cylindrical valve core 2 is at the target position, the throttling flow rate of the capillary flow channel formed by the corresponding connected capillary tube and the flow passage 21 is not equal to the throttling flow rate of the capillary flow channel formed when it is at the initial position.

[0075] In this technical solution, by detecting the real-time pressure and temperature of the refrigerant at the first confluence pipe 31 and the second confluence pipe 32 during operation, it is possible to compare them with the corresponding target range, and to realize the adaptive and automatic position adjustment of the cylindrical valve core 2 based on the comparison results. This allows for the selection of a capillary tube with a more suitable flow diameter to be connected in the refrigerant pipeline of the air conditioner, ensuring that the air conditioner can meet the various load operation requirements.

[0076] In some embodiments, the pressure range includes multiple pressure intervals from high to low, the temperature range includes multiple temperature intervals from high to low, the pressure difference range includes multiple pressure difference intervals from high to low, and the temperature difference range includes multiple temperature difference intervals from high to low. The aforementioned "from high to low" specifically refers to the endpoint values ​​of the corresponding intervals decreasing from high to low, thus causing the different intervals separated by these endpoint values ​​to exhibit a decreasing trend.

[0077] When the real-time input pressure Pin or the real-time output pressure Pout is not lower than the higher range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not lower than the higher range among the multiple temperature ranges, and |Pin-Pout| is not lower than the higher range among the multiple pressure difference ranges, and |Tin-Tout| is not lower than the higher range among the multiple temperature difference ranges, it indicates that when the cylindrical valve core 2 of the capillary tube is in the corresponding initial position, the throttling flow rate of the capillary tube throttling device is too large or too large, resulting in excessive pressure loss of the refrigerant flowing through it in the system. Therefore, the cylindrical valve core 2 is controlled to connect to the capillary tube with a smaller throttling flow rate in the formed capillary flow channel. Alternatively, when the throttling flow rate of the capillary tube connected by the cylindrical valve core 2 in the initial position is the smallest among the capillary tubes in terms of the throttling flow rate of each formed capillary flow channel, the cylindrical valve core 2 is controlled to remain in the initial position; or...

[0078] When the real-time input pressure Pin or the real-time output pressure Pout is not higher than the lower range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not higher than the lower range among the multiple temperature ranges, and |Pin-Pout| is not higher than the lower range among the multiple pressure difference ranges, and |Tin-Tout| is not higher than the higher range among the multiple temperature difference ranges, it indicates that when the cylindrical valve core 2 of the capillary tube is in the corresponding initial position, the throttling flow rate of the capillary tube throttling device is too small or too low, resulting in a small or low pressure drop of the refrigerant before and after it in the system. Therefore, the capillary tube with a larger throttling flow rate is controlled to be connected by the cylindrical valve core 2, or when the throttling flow rate of the capillary tube formed by the cylindrical valve core 2 in the initial position is the largest of the throttling flow rates of all formed capillary tubes, the cylindrical valve core 2 is controlled to remain in the initial position; or...

[0079] When the real-time input pressure Pin or the real-time output pressure Pout is in the middle of the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is in the middle of the multiple temperature ranges, and |Pin-Pout| is in the middle of the multiple pressure difference ranges and |Tin-Tout| is in the middle of the multiple temperature difference ranges, it indicates that the throttling flow of the throttling device is appropriate. Therefore, the cylindrical valve core 2 is controlled to remain in the initial position, that is, there is no need to adjust the position of the cylindrical valve core 2 at this time.

[0080] In a preferred embodiment, when the cylindrical valve core 2 is connected to the capillary with a smaller throttling flow rate in the capillary flow channel, the higher the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the higher the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the higher the pressure difference range of |Pin-Pout|, and the higher the temperature difference range of |Tin-Tout|, the greater the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position; or, when the cylindrical valve core 2 is connected to the capillary with a larger throttling flow rate in the capillary flow channel, the lower the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the lower the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the lower the pressure difference range of |Pin-Pout|, and the lower the temperature difference range of |Tin-Tout|, the greater the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position. In this technical solution, the greater the difference between each real-time detection value and the target range, the greater the position adjustment of the cylindrical valve core 2, which in turn enables the throttling flow rate of the throttling device to be adjusted more quickly, and the response effect of the device is better.

[0081] In some embodiments, when the operating command is an air conditioner start-up command, before controlling the cylindrical valve core 2 of the capillary throttling device to reach the initial position, a valve core self-check step is included. This involves controlling the rotation drive component to drive the cylindrical valve core 2 to rotate towards the first end of the central hole, and then driving the cylindrical valve core 2 to rotate in the opposite direction towards the second end of the central hole. The displacement of the cylindrical valve core 2 is monitored. If the cylindrical valve core 2 has been moved to the first end and the second end successively, it is then controlled to move to the initial position. If the cylindrical valve core 2 fails to be moved to the first end and the second end successively, an abnormal status warning for the throttling device is issued. This effectively prevents subsequent invalid operations due to throttling device malfunction.

[0082] The following describes a specific embodiment of the present invention with reference to the accompanying drawings.

[0083] (a) Capillary throttling device

[0084] like Figure 1 As shown, the capillary throttling device specifically includes a valve core (i.e., the cylindrical valve core 2 mentioned above, the same below), an electromagnetic coil (i.e., the electromagnetic coil 4 mentioned above, the same below), a left valve seat (i.e., the left valve seat 11 mentioned above, the same below), a right valve seat (i.e., the right valve seat 12 mentioned above, the same below), a sealing shell (i.e., the sealing shell 6 mentioned above, the same below), and a capillary tube (i.e., the capillary tube mentioned above, specifically including...). Figure 1 The device consists of seven components: capillary tubes 1 to 4 shown, and temperature and pressure sensors (i.e., the aforementioned first detection component 51 and second detection component 52, hereinafter the same).

[0085] The valve core, specifically, refers to a cylindrical stainless steel device with multiple channels, located at the center of the throttling device's cavity. Its top, where it connects to the electromagnetic coil, has a force-bearing component (e.g., a permanent magnet) corresponding to the coil. Through the operation of the electromagnetic coil, it moves up and down along its trajectory. Along this trajectory are valve core channels connecting the left and right valve seat channels (i.e., the flow channel 21 mentioned earlier, hereinafter the same). When the valve core moves to a specific working position (i.e., the initial or target position mentioned earlier), one of its internal valve core channels connects to one of the valve seat channels of the left or right valve seat, allowing refrigerant to flow through. Other valve core channels cannot connect to the valve seat channels of the left and right valve seats, preventing refrigerant flow. This ensures that the refrigerant has only one channel within the throttling device. Different specifications of capillary tubes are installed on the outside of the left and right valve seat channels of the throttling device. Under the control of the control algorithm, the throttling device can switch between using different specifications of capillary tubes to meet the different throttling requirements of the air conditioner.

[0086] An electromagnetic coil, specifically, refers to a device that provides power to the valve core of a throttling device. Under the regulation of the control algorithm, different currents and energizing times are applied to the electromagnetic coil, causing the valve core to be subjected to force, which in turn drives the valve core to complete the upward and downward movements.

[0087] The left valve seat specifically refers to the left valve seat located inside the sealing housing of the throttling device. It has multiple valve seat channels inside. The outer side of the valve seat channel is connected to a capillary tube of a specific specification. The inner side of the valve seat channel is designed so that when the valve core moves to a specific position, the valve seat channel connects to the valve core channel. At this time, the other side of the valve core channel is also connected to one of the valve seat channels of the right valve seat, so that the refrigerant can pass through the throttling device.

[0088] The right valve seat specifically refers to the right valve seat located inside the sealing housing of the throttling device. It has multiple valve seat channels inside. The outer side of the valve seat channel is connected to a capillary tube of a specific specification. The inner side of the valve seat channel is designed so that when the valve core moves to a specific position, the valve seat channel connects to the valve core channel. At this time, the other side of the valve core channel is also connected to one of the valve seat channels of the left valve seat, so that the refrigerant can pass through the throttling device.

[0089] like Figure 2 As shown, the vertical distance between the center positioning points of the left valve seat channel is L, and the vertical distance between the center positioning points of the right valve seat channel is L. However, the center positioning points of the left and right valve cores are not at the same horizontal level. The corresponding left and right valve core positioning points have a vertical height difference of h (e.g., ...). Figure 2 (as shown)

[0090] The sealing shell specifically refers to a sealed cavity made of stainless steel or copper alloy that encloses the valve core, left valve seat, and right valve seat. Its top is reserved with a structural buckle for connecting the electromagnetic coil, which meets the requirements for the installation and removal of the electromagnetic coil. In addition, the upper column of the valve core component can be connected to the upper part of the sealing shell through a sealing device to meet the lifting and lowering displacement of the valve core.

[0091] The capillary tube specifically refers to a capillary tube assembly that is installed / connected to the sealed housing of the throttling device on one side and is connected to the left valve seat and the right valve seat respectively. Its other side is connected to a branch through a pipeline (such as the first confluence pipe 31 and the second confluence pipe 32 mentioned above), and a temperature and pressure sensor device is provided at the confluence pipeline position.

[0092] (1) Left / right capillary pairing rules: left capillary tube 1 is paired with right capillary tube 1, left capillary tube 2 is paired with right capillary tube 2, left capillary tube 3 is paired with right capillary tube 3, left capillary tube 4 is paired with right capillary tube 4.

[0093] (2) Capillary tubes 1, 2, 3 and 4 on the same side can be capillary tubes of the same specification or capillary tubes of two or more specifications.

[0094] (3) The capillaries between different pairing groups on the left and right sides should not be completely identical. If the diameter is the same, the length of the capillaries should be differentiated to avoid capillary pairing groups with the same throttling capacity.

[0095] A temperature sensor, specifically, refers to a sensor installed at the confluence of the inlet and outlet pipes of the throttling device to detect the temperature of the refrigerant exiting the confluence pipe (e.g., ...). Figure 1 (as shown)

[0096] A pressure sensor, specifically, refers to a sensor installed at the junction of the inlet and outlet manifolds of the throttling device to detect the refrigerant pressure at the junction of the inlet and outlet manifolds (such as...). Figure 1 (as shown)

[0097] (II) Control System Framework of Capillary Throttling Device

[0098] like Figure 3 As shown, the control system framework of the capillary throttling device includes: a central control module, a sensor module, an actuator module, an adaptive throttling control module, and a control algorithm compilation module;

[0099] The central control module is the core control module of the throttling device. It coordinates the control sensor module to obtain real-time detection parameters, receives data information transmitted from the sensor modules (temperature sensor and pressure sensor), completes the reception, processing and transmission of data information, and then calls the adaptive throttling control module to judge, select and provide feedback on the control method. Finally, it calls the actuator module to complete the corresponding adaptive throttling control command.

[0100] The adaptive throttling control module specifically refers to the control algorithm unit and the decision unit of the throttling device. After receiving the data transmitted by the central control module, it completes the filtering, processing and judgment of the data, decides the throttling control command applicable to the current state of the air conditioner, and feeds the command back to the central control module. The central control module then mobilizes the actuator module to complete the corresponding adaptive throttling control action.

[0101] The control algorithm compilation module specifically refers to the control algorithm compilation module that is open to technicians designing throttling devices. Technicians can upload the compiled control algorithm through the control algorithm compilation module to adapt to the control methods of different models. In this way, the throttling device can be used for more products, and the throttling device control method can be compiled to match the usage characteristics of different products. It can also improve the control accuracy and intelligence level of the throttling component according to the usage needs of air conditioning products.

[0102] The sensor module specifically includes a sensor for detecting the refrigerant temperature at the outlet of the throttling device and a sensor for detecting the refrigerant pressure at the outlet of the throttling device.

[0103] Actuator components, specifically referring to the solenoid coil components and valve core (i.e. Figure 1 (The capillary throttling device shown).

[0104] The electromagnetic coil component, when current flows in different directions and for different durations, can apply upward and downward forces to the valve core component to adjust the position of the valve core.

[0105] The valve core component is a cylindrical stainless steel device with multiple channels. At the top of the valve core, where it connects to the electromagnetic coil, there is a force-receiving component corresponding to the electromagnetic coil. When the electromagnetic coil applies a specific force to the force-receiving component of the valve core, the force-receiving component drives the valve core to achieve a lifting and lowering action.

[0106] (three) Air conditioner control methods

[0107] See Figure 4As shown, the air conditioner control method of the present invention can also be called the adaptive control method of the capillary throttling device. It is a series of control strategies and execution strategies jointly completed by the central control module, the sensor module, the actuator module and the adaptive throttling control module.

[0108] Specific control measure 1:

[0109] After the air conditioner is connected to the power supply, the central control module first wakes up the actuator module. Upon receiving the operating command from the central control module, the actuator module energizes the electromagnetic coil component, causing the valve core component to move, first rising to the top position and then descending to the bottom position. This self-test command checks whether the throttling component is damaged. The specific method of the self-test command is as follows:

[0110] If the valve core fails to complete the instruction to "first rise to the top position and then descend to the bottom position", the central control module will issue an abnormal status warning for the throttling component; if the valve core completes the instruction to "first rise to the top position and then descend to the bottom position", the central control module considers the throttling component to be normal, and the system will continue to execute subsequent instructions.

[0111] After the central control module completes the above self-test command, when the central control module considers the throttling component to be normal, the control valve core component moves to the default working position (that is, the aforementioned initial position).

[0112] The default operating position of the valve core can be any one of the valve core operating positions ①, ②, ③, and ④ in the embodiment.

[0113] In one specific embodiment, the valve core component moves to the default working position, which is the valve core working position ④ of the embodiment (the working position corresponding to the minimum throttling flow).

[0114] Once the central control module completes the above self-test instructions and the valve core moves to the default working position, the central control module will enter standby mode until the user sets the operating mode of the air conditioner.

[0115] When the user sets the operating mode of the air conditioner, the central control module switches from standby mode to working mode. At this time, the central control module first sends a command to the actuator module according to the working mode set by the user. Then, the actuator module controls the electromagnetic coil to be energized according to the operating mode flag sent by the central control module. The working of the electromagnetic coil drives the valve core to rise and fall, realizing the switching of the throttling device to the corresponding working position.

[0116] The specific control method for switching to the corresponding valve core working position based on the operating mode flag sent by the central control module is as follows:

[0117] When the central control module receives a user's notification that the operating mode ① has been activated, it sends a valve core working position ① command to the actuator module. The actuator module then energizes the solenoid coil component based on this command, causing the solenoid coil to move the valve core to position ①. Figure 5 As shown;

[0118] When the central control module receives a user's notification that operating mode ② has been activated, it sends a valve core working position ② command to the actuator module. The actuator module then energizes the solenoid coil component based on this command, causing the solenoid coil to move the valve core to position ②. Figure 6 As shown;

[0119] When the central control module receives a user's notification that operating mode ③ has been activated, it sends a valve core working position ③ command to the actuator module. The actuator module then energizes the solenoid coil component based on this command, causing the solenoid coil to move the valve core to position ③. Figure 7 As shown;

[0120] When the central control module receives a user's notification that the operating mode ④ has been activated, it sends a valve core working position ④ command to the actuator module. The actuator module then energizes the solenoid coil component based on this command, causing the solenoid coil to move the valve core to the working position ④. Figure 8 As shown;

[0121] Specific control measure 2:

[0122] After the central control module completes the above work instructions, it enters the working state of the adaptive throttling control module;

[0123] First, the adaptive throttling control module sends a data acquisition command to the central control module;

[0124] The specific content of the data acquisition instruction is as follows: collect a set of refrigerant pressure Pin on the inlet side of the system's manifold, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side at time intervals of △t.

[0125] When the central control module receives the data acquisition command from the adaptive throttling control module, it immediately sends a working command to the sensor module to collect the refrigerant pressure Pin on the inlet side of the manifold, the refrigerant temperature Tin on the inlet side, the refrigerant pressure Pout on the outlet side, and the refrigerant temperature Tout on the inlet side. Then, the pressure sensor and the temperature sensor in the sensor module will collect a set of real-time data of the refrigerant pressure Pin on the inlet side of the manifold, the refrigerant temperature Tin on the inlet side, the refrigerant pressure Pout on the outlet side, and the refrigerant temperature Tout on the inlet side, and feed this set of data back to the central control module. After receiving the data, the central control module feeds the set of data back to the adaptive throttling control module, which then completes the subsequent judgment command.

[0126] Specifically, after the central control module receives the first set of data acquisition commands from the adaptive throttling control module, the central control module continuously sends data acquisition commands to the sensor module at time intervals of Δt. Under the control of the central control module, the sensor module collects a set of parameters at time intervals of ΔT: refrigerant pressure Pin on the inlet side of the manifold, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side. These parameters are then fed back to the central control module and the adaptive throttling control module until the user shuts down the system.

[0127] The value of △t ranges from 1 to 30 minutes, with a preferred value of 5 minutes;

[0128] Specific control measure 3:

[0129] When the adaptive throttling control module receives the refrigerant pressure Pin, refrigerant temperature Tin, refrigerant pressure Pout, and refrigerant temperature Tout parameters from the central control module, it will execute the following judgment command:

[0130] Judgment instruction 1: if (P1≤Pin or P1≤Pout), and △P1≤|Pin-Pout|, and (T1≤Tin1 or T1≤Tout), and △T1≤|Tin-Tout|, then the adaptive throttling control module executes control instruction 1;

[0131] Judgment instruction 2: if (P2≤Pin<P1 or P2≤Pout<P1), and △P2≤|Pin-Pout|<△P1, and (T2≤Tin<T1 or T2≤Tout<T1), and △T2≤|Tin-Tout|<△T1, then the adaptive throttling control module executes control instruction 2;

[0132] Judgment instruction 3: if (P3≤Pin<P2 or P3≤Pout<P2), and △P3≤|Pin-Pout|<△P2, and (T3≤Tin<T2 or T3≤Tout<T2), and △T3≤|Tin-Tout|<△T2, then the adaptive throttling control module executes control instruction 3;

[0133] Judgment instruction 4: if (P4≤Pin<P3 or P4≤Pout<P3), and (T4≤Tin<T3 or T4≤Tout<T3), then the adaptive throttling control module executes control instruction 4;

[0134] Judgment instruction 5: if (P5≤Pin<P4 or P5≤Pout<P4), and △P5≤|Pin-Pout|<△P4, and (T5≤Tin<T4 or T5≤Tout<T4), and △T5≤|Tin-Tout|<△T4, then the adaptive throttling control module executes control instruction 5;

[0135] Judgment instruction 6: if (P6≤Pin<P5 or P6≤Pout<P5), and △P6≤|Pin-Pout|<△P5, and (T6≤Tin<T5 or T6≤Tout<T5), and △T6≤|Tin-Tout|<△T5, then the adaptive throttling control module executes control instruction 6;

[0136] Judgment instruction 7: if (Pin < P6 or Pout < P6), and |Pin - Pout| < △P6, and (Tin < T6 or Tout < T6), and |Tin - Tout| < △T6, then the adaptive throttling control module executes control instruction 7;

[0137] The specific rules and understanding of the above judgment instructions are as follows:

[0138] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 1, it is considered that the throttling flow rate of the throttling device is too large, resulting in excessive pressure loss of the refrigerant before and after the throttling device. Therefore, it is necessary to reduce the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 1.

[0139] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 2, it is considered that the throttling flow rate of the throttling device is large, resulting in a large pressure loss of the refrigerant before and after the throttling device. Therefore, it is necessary to appropriately reduce the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 2.

[0140] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 3, it is considered that the throttling flow rate of the throttling device is slightly large, resulting in a slightly larger pressure loss of the refrigerant before and after the throttling device. Therefore, it is necessary to slightly reduce the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 3.

[0141] When the refrigerant pressure Pin on the inlet side of the confluence pipe, the refrigerant temperature Tin on the inlet side, the refrigerant pressure Pout on the outlet side, and the refrigerant temperature Tout on the inlet side meet the judgment command 4, it is considered that the throttling flow of the throttling device is appropriate, and the adaptive throttling control module executes control command 4.

[0142] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 5, it is considered that the throttling flow rate of the throttling device is too small, resulting in a small pressure drop of the refrigerant before and after the throttling device. Therefore, it is necessary to slightly increase the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 5.

[0143] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 6, it is considered that the throttling flow rate of the throttling device is small, resulting in a small pressure drop of the refrigerant before and after the throttling device. Therefore, it is necessary to appropriately increase the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 6.

[0144] When the parameters of refrigerant pressure Pin on the inlet side of the confluence pipe, refrigerant temperature Tin on the inlet side, refrigerant pressure Pout on the outlet side, and refrigerant temperature Tout on the inlet side meet the judgment instruction 7, it is considered that the throttling flow rate of the throttling device is too small, resulting in a small pressure drop of the refrigerant before and after the throttling device. Therefore, it is necessary to increase the throttling flow rate of the throttling device. At this time, the adaptive throttling control module executes control instruction 7.

[0145] The order of the throttling capacity of the throttling device from high to low is: valve core working position ① > valve core working position ② > valve core working position ③ > valve core working position ④;

[0146] The specific control methods corresponding to the control commands of the adaptive throttling control module are as follows:

[0147] When the adaptive throttling control module executes control command 1, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically: if the throttling device is in position ①, the valve core descends 3 positions, switching to position ④; if the throttling device is in position ②, the valve core descends 2 positions, switching to position ④; if the throttling device is in position ③, the valve core descends 1 position, switching to position ④; if the throttling device is in position ④, it remains unchanged.

[0148] When the adaptive throttling control module executes control command 2, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically: if the throttling device is in position ①, the valve core descends two positions, switching to position ③; if the throttling device is in position ②, the valve core descends two positions, switching to position ④; if the throttling device is in position ③, the valve core descends one position, switching to position ④; if the throttling device is in position ④, it remains unchanged.

[0149] When the adaptive throttling control module executes control command 3, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically, if the throttling device is in position ①, the valve core descends one position, switching to position ②; if the throttling device is in position ②, the valve core descends one position, switching to position ③; if the throttling device is in position ③, the valve core descends one position, switching to position ④; if the throttling device is in position ④, it remains unchanged.

[0150] When the adaptive throttling control module executes control command 4, the adaptive control module considers that the throttling amount of the throttling device is moderate and no adjustment is needed.

[0151] When the adaptive throttling control module executes control command 5, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically: if the throttling device is in working position ①, it remains unchanged; if the throttling device is in working position ②, the valve core moves up one working position, switching to working position ①; if the throttling device is in working position ③, the valve core moves up one working position, switching to working position ②; if the throttling device is in working position ④, the valve core moves up one working position, switching to working position ③.

[0152] When the adaptive throttling control module executes control command 6, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically: if the throttling device is in working position ①, it remains unchanged; if the throttling device is in working position ②, the valve core moves up one working position, switching to working position ①; if the throttling device is in working position ③, the valve core moves up two working positions, switching to working position ①; if the throttling device is in working position ④, the valve core moves up two working positions, switching to working position ②.

[0153] When the adaptive throttling control module executes control command 7, it sends a control command back to the central control module. Upon receiving this command, the central control module activates the actuator module. The electromagnetic coil component of the actuator module, upon receiving the command, controls the valve core to move. Specifically: if the throttling device is in working position ①, it remains unchanged; if the throttling device is in working position ②, the valve core moves up one working position, switching to working position ①; if the throttling device is in working position ③, the valve core moves up two working positions, switching to working position ①; if the throttling device is in working position ④, the valve core moves up three working positions, switching to working position ①.

[0154] When the adaptive throttling control module completes the above-mentioned specific control measure 3 and enters the execution of one of the control instructions 1, 2, 3, 4, 5, 6, and 7, the control flow is fed back from the specific control measure 3 to the specific control measure 2 to perform real-time dynamic control adjustment.

[0155] The specific purpose of real-time dynamic control adjustment is as follows: After the adaptive throttling control module executes one of the control commands 1, 2, 3, 4, 5, 6, and 7, the system parameters will fluctuate. After the fluctuation, the system will reach a new steady state. At this time, the adaptive throttling control module needs to monitor the air conditioner's system parameters in real time and make further adjustment commands. Therefore, real-time dynamic control adjustment is required.

[0156] The specific implementation method of the adaptive throttling control module for real-time dynamic control adjustment is as follows: when the control process receives the real-time dynamic control adjustment instruction from the specific control measure 3 to the specific control measure 2, the adaptive throttling control module switches the workflow back to the workflow of the specific control measure 2 (specifically, it returns to the data acquisition, judgment and working instructions involved in the above-mentioned specific control measure 2), and executes the working instructions of the specific control measure 3 again to complete the matching control of the throttling device of the new steady-state system. This cycle continues until the system is stable or the user stops the machine.

[0157] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0158] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A capillary throttling device, characterized in that, include: A valve seat (1) has a central hole with a circular cross-section. A first capillary group is connected to the first side wall of the valve seat (1), and a second capillary group is connected to the second side wall of the valve seat (1). The first capillary group includes multiple capillary tubes, and the second capillary group includes multiple capillary tubes. A cylindrical valve core (2) is assembled in the central hole. The cylindrical valve core (2) has a flow channel assembly, which includes multiple flow channels (21). The cylindrical valve core (2) can be driven to rotate at different angles, such that at one angle, one capillary in the first capillary group and one capillary in the second capillary group are connected through one of the flow channels (21) in the flow channel group to form a capillary flow channel, and at that angle, the other capillaries in the first capillary group and the second capillary group are not connected. The throttling flow of each of the connected capillary flow channels formed at each angle is different. The direction of the central axis from the first end to the second end of the central hole is defined as the first direction. The valve seat (1) and the cylindrical valve core (2) are threaded together. The distance between each capillary in the first capillary group in the first direction is L. The distance between each capillary in the second capillary group in the first direction is also L. Along the first direction, the first capillary in the first capillary group and the first capillary in the second capillary group have a height difference of h. Each flow channel (21) is inclined along the first direction to accommodate the height difference.

2. The capillary throttling device according to claim 1, characterized in that, Each capillary in the first capillary group and each capillary in the second capillary group are spaced apart along the first direction. The flow diameter of each capillary in the first capillary group increases sequentially along the first direction, and the flow diameter of each capillary in the second capillary group increases sequentially along the first direction. The number of capillary in the first capillary group is equal to the number of capillary in the second capillary group. Along the first direction, the flow diameter of capillary with the same position is equal. Each flow channel (21) in the flow channel group is spaced apart along the first direction, and the number is equal to the number of capillary in the first capillary group. Each flow channel (21) corresponds to the position of each capillary in the first capillary group and each capillary in the second capillary group.

3. The capillary throttling device according to claim 1 or 2, characterized in that, The valve seat (1) is an integral valve seat; or, The valve seat (1) is formed by combining a left valve seat (11) and a right valve seat (12). The first capillary group is disposed on the left valve seat (11), and the second capillary group is disposed on the right valve seat (12).

4. The capillary throttling device according to claim 1, characterized in that, The ends of each capillary tube in the first capillary tube group that are away from the first sidewall converge at the first confluence tube (31), and the ends of each capillary tube in the second capillary tube group that are away from the second sidewall converge at the second confluence tube (32). The first confluence tube (31) is provided with a first detection component (51) for detecting the pressure and temperature of the refrigerant inside, and the second confluence tube (32) is provided with a second detection component (52) for detecting the pressure and temperature of the refrigerant inside.

5. The capillary throttling device according to claim 1, characterized in that, It also includes a sealing housing, which is fitted onto the outside of the valve seat (1).

6. The capillary throttling device according to claim 2, characterized in that, It also includes a rotary drive component, which includes an electromagnetic coil (4). When the electromagnetic coil (4) is energized, it generates a magnetic force that can drive the cylindrical valve core (2) to rotate.

7. An air conditioner, characterized in that, It includes an evaporator and a condenser, wherein a capillary throttling device according to any one of claims 1 to 6 is provided on the refrigerant pipeline between the evaporator and the condenser.

8. A control method for an air conditioner as described in claim 7, characterized in that, Includes the following steps: Obtain the execution command; When the running command is an air conditioner start command, the cylindrical valve core (2) of the capillary throttling device is controlled to be in the initial position. In the initial position, the first capillary in the first capillary group is connected to the first capillary in the second capillary group through the first flow passage in the cylindrical valve core (2). Obtain the real-time input pressure Pin and real-time input temperature Tin of the refrigerant in the first confluence pipe (31) and the real-time output pressure Pout and real-time output temperature Tout of the refrigerant in the second confluence pipe (32); Based on the relationship between the real-time input pressure Pin or real-time output pressure Pout and the pressure range, the real-time input temperature Tin or real-time output temperature Tout and the temperature range, |Pin-Pout| and the pressure difference range, and |Tin-Tout| and the temperature difference range, the rotation angle of the cylindrical valve core (2) is controlled, thereby adjusting the cylindrical valve core (2) from the initial position to the target position or keeping it at the initial position. When the cylindrical valve core (2) is at the target position, the throttling flow rate of the capillary tube and the flow channel (21) formed by them is not equal to the throttling flow rate of the capillary flow channel formed when it is at the initial position.

9. The control method for an air conditioner according to claim 8, characterized in that, The pressure range includes multiple pressure intervals from high to low, the temperature range includes multiple temperature intervals from high to low, the pressure difference range includes multiple pressure difference intervals from high to low, and the temperature difference range includes multiple temperature difference intervals from high to low. When the real-time input pressure Pin or the real-time output pressure Pout is not lower than the higher range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not lower than the higher range among the multiple temperature ranges, and |Pin-Pout| is not lower than the higher range among the multiple differential pressure ranges, and |Tin-Tout| is not lower than the higher range among the multiple temperature difference ranges, the cylindrical valve core (2) is controlled to connect the capillary with a smaller throttling flow rate to the capillary flow channel formed; or when the throttling flow rate of the capillary flow channel formed by the cylindrical valve core (2) in the initial position is the smallest among the throttling flow rates of each formed capillary flow channel, the cylindrical valve core (2) is controlled to remain in the initial position; or, When the real-time input pressure Pin or the real-time output pressure Pout is not higher than the lower range among the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is not higher than the lower range among the multiple temperature ranges, and |Pin-Pout| is not higher than the lower range among the multiple differential pressure ranges, and |Tin-Tout| is not higher than the higher range among the multiple temperature difference ranges, the cylindrical valve core (2) is controlled to connect the capillary with a larger throttling flow rate to the capillary flow channel formed; or when the throttling flow rate of the capillary flow channel formed by the cylindrical valve core (2) in the initial position is the largest among the throttling flow rates of each formed capillary flow channel, the cylindrical valve core (2) is controlled to remain in the initial position; or, When the real-time input pressure Pin or the real-time output pressure Pout is in the middle of the multiple pressure ranges, and the real-time input temperature Tin or the real-time output temperature Tout is in the middle of the multiple temperature ranges, and |Pin-Pout| is in the middle of the multiple differential pressure ranges and |Tin-Tout| is in the middle of the multiple temperature difference ranges, the cylindrical valve core (2) is controlled to remain in the initial position.

10. The control method for an air conditioner according to claim 9, characterized in that, When the cylindrical valve core (2) controls the connection of the capillary flow channel formed by the small throttling flow rate of the capillary, the higher the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the higher the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the higher the pressure difference range of |Pin-Pout|, and the higher the temperature difference range of |Tin-Tout|, the greater the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position; or, When the cylindrical valve core (2) controls the capillary flow channel formed by the capillary flow channel with a large throttling flow rate, the lower the pressure range of the real-time input pressure Pin or the real-time output pressure Pout, the lower the temperature range of the real-time input temperature Tin or the real-time output temperature Tout, the lower the pressure difference range of |Pin-Pout|, and the lower the temperature difference range of |Tin-Tout|, the larger the throttling flow rate difference of the capillary flow channel corresponding to the adjustment from the initial position to the target position.

11. The control method for an air conditioner according to claim 8, characterized in that, When the operating command is an air conditioner start-up command, before controlling the cylindrical valve core (2) of the capillary throttling device to be in the initial position, the following is also included: The valve core self-test step involves controlling the rotation drive component to drive the cylindrical valve core (2) to rotate towards the first end of the central hole, and then driving the cylindrical valve core (2) to rotate in the opposite direction towards the second end of the central hole. The displacement of the cylindrical valve core (2) is monitored. After the cylindrical valve core (2) is moved to the first end and the second end in succession, the control drives the cylindrical valve core (2) to move to the initial position. If the cylindrical valve core (2) fails to be moved to the first end and the second end in succession, an abnormal status reminder of the throttling device is issued.

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