Expansion valve actuating structure, return-to-zero control method, storage medium and electronic equipment
By setting a torsion spring and limit block in the expansion valve, combined with motor Hall signal detection, the problem of resetting noise of expansion valve is solved, and accurate judgment of valve zeroing and noise reduction are achieved.
Patent Information
- Application Number
- CN202510635319.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, the expansion valve will generate noise when resetting, affecting the customer experience.
By setting a torsion spring and a limit block of offset angle on the fixed base, combined with the motor Hall signal detection, the accurate judgment of valve zeroing is achieved and noise generation is reduced.
Effectively detect valves to zero, reduce noise and improve customer experience.
Smart Images
Figure CN120488563A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of expansion valve zeroing, and in particular to an expansion valve actuation structure and zeroing control method, a storage medium, and an electronic device. Background Art
[0002] The electronic expansion valve in the vehicle's air conditioning / battery temperature control system circuit needs to be initialized and reset when the vehicle is powered on. That is, the electronic expansion valve must be adjusted to zero point to facilitate the subsequent control of the valve opening according to the response of the ZCU. When resetting the current electronic expansion valve, in order to ensure that the valve needle can return to absolute zero, the valve needle is controlled to move a number of pulse steps greater than the full-open stroke. For example, if the full-open stroke is 500 steps, a command to move 580 steps is sent to the electronic expansion valve during reset. The valve needle can be reset even if it is in the fully open position. However, since there is a hard limit between the valve needle and the base, after the valve needle returns to zero, it will continue to move at least 80 steps, which will cause repeated collisions in the hard limit area to produce noise. The noise is transmitted to the passenger compartment through the air-conditioning box, affecting the customer experience. Summary of the Invention
[0003] The purpose of this application is to overcome the deficiency in the prior art that the expansion valve reset will generate noise, and to provide an expansion valve actuation structure and zeroing control method, storage medium and electronic equipment that can timely detect the zero point and avoid impact noise.
[0004] The technical solution of the present application provides an expansion valve actuation structure, comprising:
[0005] A fixed base, the top of which is provided with a mechanical zero point limit block and a detection zero point limit block offset by a preset angle, and the lower end of the side wall is provided with a torsion spring bayonet;
[0006] a torsion spring sleeved outside the fixed base, wherein the lower end of the torsion spring is fixed to the torsion spring bayonet, and the upper end thereof is pre-twisted so as to contact the side of the detection zero point limit block toward the mechanical zero point limit block;
[0007] The rotor is located above the fixed base and is provided with a stop block protruding downward. When the rotor rotates until the valve returns to zero, the stop block hits the upper end of the torsion spring. Whether the valve returns to zero is determined by detecting whether the upper end of the torsion spring is hit.
[0008] Furthermore, a convex ring is provided at the lower end of the side wall of the fixed base, and the torsion spring bayonet is provided on the convex ring;
[0009] An upper bent portion is provided at the upper end of the torsion spring, and the upper bent portion extends along the axial direction of the fixed base to form an upper axial section and then extends radially inward to form an upper horizontal section that abuts against the detection zero point limit block;
[0010] The lower end of the torsion spring is provided with a lower bending portion, which extends a lower axial section along the axial direction of the fixed base and then extends a lower horizontal section along the circumferential direction. The lower axial section is inserted into the torsion spring bayonet, and the lower horizontal section abuts against the lower surface of the convex ring.
[0011] Furthermore, the height of the upper horizontal section is greater than the height of the detection zero point limit block and is less than or equal to the height of the mechanical zero point limit block.
[0012] Furthermore, the torsion spring is in a stretched state in the axial direction.
[0013] The technical solution of the present application further provides an expansion valve zeroing control method for the aforementioned expansion valve actuation structure, comprising:
[0014] In response to the expansion valve being powered on, controlling the rotor to perform a return-to-zero rotation operation;
[0015] Get the motor Hall signal;
[0016] If the motor Hall signal meets the zero-point conflict condition, the rotor is controlled to stop rotating and an initialization completion signal is output.
[0017] Furthermore, the zero-point conflict condition specifically includes:
[0018] If the cycle time of a first number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle;
[0019] If the duty cycles of the waveforms of the abnormal periods are all outside the target duty cycle range, the zero point conflict condition is met.
[0020] Furthermore, the zero-point conflict condition also includes:
[0021] If the cycle time of a second number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle, and the second number is greater than the first number;
[0022] If the duty cycles of the waveforms of the abnormal period are all within a boundary duty cycle interval, the zero point conflict condition is satisfied. The boundary duty cycle interval is a boundary interval of two preset lengths of the target duty cycle interval.
[0023] Furthermore, the control rotor performs a return-to-zero rotation operation, specifically:
[0024] Control the rotor to rotate towards the zero point by a preset number of pulse steps;
[0025] The method further comprises:
[0026] If the number of rotation steps of the rotor is greater than or equal to the preset number of pulse steps, or the motor Hall signal is a stall signal, the rotor is controlled to stop rotating and an initialization completion signal is output.
[0027] The technical solution of the present application further provides a storage medium, which stores computer instructions. When a computer executes the computer instructions, it is used to execute the expansion valve zeroing control method as described above.
[0028] The technical solution of the present application further provides an electronic device, comprising at least one processor; and
[0029] a memory communicatively connected to the at least one processor; wherein,
[0030] The memory stores instructions that can be executed by the at least one processor. The instructions are executed by the at least one processor to enable the at least one processor to perform the expansion valve zeroing control method as described above.
[0031] The above technical solution has the following beneficial effects:
[0032] The present application arranges a torsion spring on a fixed base and arranges a detection zero point limit block at a position where the mechanical zero point limit block deviates from a preset angle to limit the upper end of the torsion spring. When the rotor resets and rotates, it is determined whether the stop block hits the upper end of the torsion spring by detecting whether the motor Hall signal meets the zero point conflict condition. If so, it is considered that the valve has returned to zero, and the valve zeroing can be detected in time. Moreover, since the torsion spring has a torsional force, when it is hit by the stop block, the torsional force can offset the impact force, thereby reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] The disclosure of this application will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. In the drawings:
[0034] Figure 1 This is a schematic diagram of the expansion valve actuation structure in one embodiment of the present application;
[0035] Figure 2 This is a schematic structural diagram of a fixed base and a torsion spring in one embodiment of the present application;
[0036] Figure 3 This is a schematic structural diagram of a fixed base in one embodiment of the present application;
[0037] Figure 4 is a top view of a fixed base in one embodiment of the present application;
[0038] Figure 5 This is one of the actuation state diagrams of the expansion valve actuation structure in one embodiment of the present application;
[0039] Figure 6 This is the second diagram of the actuation state of the expansion valve actuation structure in one embodiment of the present application;
[0040] Figure 7 This is the third diagram of the actuation state of the expansion valve actuation structure in one embodiment of the present application;
[0041] Figure 8 This is a flow chart of an expansion valve zeroing control method according to an embodiment of the present application;
[0042] Figure 9 This is an example diagram of the motor Hall signal;
[0043] Figure 10 This is a flow chart of a method for controlling the zeroing of an expansion valve in a preferred embodiment of the present application;
[0044] Figure 11 It is a schematic diagram of the hardware structure of an electronic device in one embodiment of the present application.
[0045] Reference table of accompanying symbols:
[0046] Fixed base 01: mechanical zero point limit block 11, detection zero point limit block 12, convex ring 13, torsion spring bayonet 131;
[0047] Torsion spring 02: upper axial section 21, upper horizontal section 22, lower axial section 23, lower horizontal section 24, spiral coil portion 25;
[0048] Rotor 03: Stop block 31. DETAILED DESCRIPTION
[0049] The specific implementation of this application is further described below with reference to the accompanying drawings.
[0050] It is easy to understand that according to the technical solution of this application, a variety of structural methods and implementation methods can be replaced with each other by those skilled in the art without changing the essential spirit of this application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of this application and should not be regarded as the entire application or as a limitation or restriction of the technical solution of the application.
[0051] In this specification, directional terms such as "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" are defined relative to the configurations shown in the accompanying drawings. These terms are relative and may vary depending on the device's location or usage. Therefore, these and other directional terms should not be construed as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0053] Expansion valve actuation structure:
[0054] The expansion valve actuation structure in the embodiment of the present application is as follows: Figure 1-4 Shown, including:
[0055] The fixed base 01 has a mechanical zero point limit block 11 and a detection zero point limit block 12 offset by a preset angle at its top, and a torsion spring bayonet 131 at the lower end of its side wall;
[0056] The torsion spring 02 is sleeved outside the fixed base 01, with the lower end of the torsion spring 02 fixed to the torsion spring bayonet 131, and the upper end is pre-twisted to contact the detection zero point limit block 12 towards the side of the mechanical zero point limit block 11;
[0057] The rotor 03 is located above the fixed base 01. The rotor 03 is provided with a stop block 31 protruding downward. When the rotor 03 rotates to the point where the valve returns to zero, the stop block 31 hits the upper end of the torsion spring 02. By detecting whether the upper end of the torsion spring 02 is hit, it is determined whether the valve has returned to zero.
[0058] Specifically, the axes of the fixed base 01 and the rotor 03 are in the same straight line, and the rotor 03 rotates around its axis, driving the stop block 31 to make circumferential motion. The detection zero point limit block 12 and the mechanical zero point limit block 11 are set along the circumference of the fixed base 01, and the two are offset by a preset angle; Figure 4 As shown, the offset angle α between the detection zero point limit block 12 and the mechanical zero point limit block 11 is controlled between 30° and 35°. If the angle is too large, the clamping force between the valve needle and the valve port may be insufficient when the stop block 31 hits the torsion spring 02, making it impossible to close the valve; if the angle is too small, the torsion spring's torsional stroke is insufficient, and it may still hit the mechanical zero point limit block 11, causing noise.
[0059] The torsion spring 02 is sleeved on the outside of the fixed base 01, the lower end of the torsion spring 02 is fixed, and the upper end is installed between the detection zero point limit block 12 and the mechanical zero point limit block 11. The torsion spring 02 is pre-twisted during installation so that the torsion spring 02 has a torsional preload. Under the action of the torsional preload, the upper end of the torsion spring 02 can contact one side of the detection zero point limit block 12, so that the torsion spring 02 can return to the position of the detection zero point limit block 12 each time it is pushed by the stop block 13.
[0060] Figure 5-Figure 7 The process of the stop block 31 hitting the torsion spring 02 is shown in FIG. Figure 5 As shown, the rotor 03 drives the stop block 31 to rotate until it contacts the torsion spring 02. Under the action of the motor torque, the stop block 31 continues to push the torsion spring 02 to rotate. As the torsion angle of the torsion spring 02 increases, the torsion force of the torsion spring 02 gradually increases. At the same time, the motor detects the collision and controls the motor to stop. As the motor torque is removed, the torsion force of the torsion spring 02 gradually equals the motor torque, and the stop block 31 and the torsion spring 02 present as shown in FIG. Figure 6 The motor torque continues to decrease, and the torsion spring 02 gradually twists toward the detection zero point limit block 12 until the motor holding force is equal to the torsion force of the torsion spring 02. Figure 7 The status shown.
[0061] In the embodiment of the present application, a torsion spring 02 is arranged on a fixed base 01, and a detection zero point limit block 12 is arranged at a position where the mechanical zero point limit block 11 deviates from a preset angle, so as to limit the upper end of the torsion spring 02. When the rotor 03 is reset and rotated, it is detected whether the stop block 31 hits the upper end of the torsion spring 02. If so, it is considered that the valve has returned to zero, and the valve zeroing can be detected in time. Moreover, since the torsion spring 02 has a torsional force, when it is hit by the stop block 31, the torsional force can offset the impact force, thereby reducing noise.
[0062] In one embodiment, Figure 2 、 4 As shown, a convex ring 13 is provided at the lower end of the side wall of the fixed base 01, and a torsion spring bayonet 131 is provided on the convex ring 13;
[0063] The upper end of the torsion spring 02 is provided with an upper bent portion, which extends along the axial direction of the fixed base 01 to form an upper axial section 21 and then extends radially inward to form an upper horizontal section 22 that contacts the detection zero point limit block 12;
[0064] A lower bending portion is provided at the lower end of the torsion spring 02. The lower bending portion extends a lower axial section 23 along the axial direction of the fixed base 01 and then extends a lower horizontal section 24 along the circumferential direction. The lower axial section 23 is inserted into the torsion spring bayonet 131, and the lower horizontal section 24 abuts against the lower surface of the convex ring 13.
[0065] Specifically, the torsion spring 02 includes a coil portion 25 wound around the outside of the fixed base 01. The number of coils in the coil portion 25 is determined based on the specific structural relationship between the fixed base 01 and the torsion spring 02. Upper and lower bent portions extend from both ends of the coil portion 25. The upper axial section 21 and upper horizontal section 22 of the upper bent portion are relatively perpendicular, while the lower axial section 23 and lower horizontal section 24 of the lower bent portion are also relatively perpendicular, achieving axially limited installation of the torsion spring 02.
[0066] The convex ring 13 can be integrally formed with the fixed base 01, or it can be an external component installed on the fixed base 01. In the embodiment of the present application, the convex ring 13 is the original nut seat structure on the fixed base 01, and a torsion spring bayonet 131 can be directly opened on its edge, which simplifies the overall structure.
[0067] In one embodiment, Figure 2 、 3 As shown, the height of the upper horizontal section 22 is greater than the height of the detection zero point limit block 12 and is less than or equal to the height of the mechanical zero point limit block 11.
[0068] Specifically, in order for the stop block 31 to be able to push the upper horizontal section 22 to rotate, the upper horizontal section 22 needs to be higher than the height of the detection zero point limit block 12. The mechanical zero point limit block 11 needs to provide a hard stop for the upper horizontal section 22 and the stop block 31, so its height needs to be greater than the upper horizontal section 22. Furthermore, the upper horizontal section 22 needs to be both limited by the detection zero point limit block 12 and able to be pushed by the stop block 31. Therefore, the protruding height of the stop block 31 and the height of the detection zero point limit block 12 need to be appropriately set according to the height of the upper horizontal section 22.
[0069] In one embodiment, the torsion spring 02 is in an axially stretched state to ensure stable installation. The axial stretching range of the torsion spring 02 should be controlled within the tension range of 0.05N-0.2N to avoid excessive static friction between the torsion spring 02 and the fixed base 01, which would prevent the torsion spring 02 from being able to torsionally slide.
[0070] As needed, the above technical solutions can be combined to achieve the best technical effect.
[0071] Expansion valve zero control method:
[0072] The technical solution of the present application also provides an expansion valve zeroing control method for the expansion valve actuation structure in any of the aforementioned embodiments, such as Figure 8 Shown, including:
[0073] Step S801: in response to the expansion valve being powered on, controlling the rotor to perform a return-to-zero rotation operation;
[0074] Step S802: Acquire the motor Hall signal;
[0075] Step S803: If the motor Hall signal meets the zero-point conflict condition, the rotor is controlled to stop rotating and an initialization completion signal is output.
[0076] Specifically, when the vehicle is powered on, the electronic expansion valve in the air conditioning / battery temperature control system circuit is also powered on synchronously. At this time, the rotor needs to be controlled to perform a zero rotation operation, and the rotor drives the valve needle to rotate in the direction of closing the valve. The motor Hall signal is obtained during the rotation process. When there is no resistance to the rotor, the motor can rotate at a stable speed, and the motor Hall signal is a stable square wave. When the rotor drives the stop block to hit the torsion spring of the detection zero point, the motor rotation is resisted, and the motor Hall signal fluctuates. The fluctuation of the motor Hall signal when the stop block hits the detection zero point is determined by detection, and the zero point conflict condition is determined. When the motor Hall signal is monitored to meet the zero point conflict condition, it is considered that the stop block has hit the detection zero point, the rotor is controlled to stop rotation, and the initialization completion signal is output.
[0077] The embodiment of the present application detects the motor Hall signal to determine whether the stop point hits the detection zero point, thereby controlling the rotor to stop immediately to prevent the stop point from rotating to hit the mechanical zero point and generating noise.
[0078] In one embodiment, the zero-point conflict condition specifically includes:
[0079] If the cycle time of a first number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle;
[0080] If the duty cycle of the waveforms of the abnormal period is outside the target duty cycle range, the zero point conflict condition is met.
[0081] like Figure 9 As shown in the figure, when the motor is operating normally, its Hall effect signal is a regular square wave, and the period and duty cycle of each square wave are relatively stable. When the stopper hits the torsion spring used for zero point detection, the spring exerts a reverse force on the stopper, causing the rotor to vibrate. This causes the Hall effect signal to fluctuate, shortening its period and shifting its duty cycle from its normal value.
[0082] Specifically, by analyzing the motor Hall signal, the preset cycle time and target duty cycle range are determined. If the cycle time of the first number of consecutive Hall cycles is less than the preset cycle time, the first number of consecutive Hall cycles are judged as abnormal cycles, and then the waveform duty cycle of the abnormal cycle is judged. If the waveform duty cycle of the abnormal cycle is outside the target duty cycle range, it means that the rotor encounters resistance during rotation, and it is judged that the zero-point conflict condition is met.
[0083] Among them, the first number can be set to three or more, the preset cycle time is determined according to the motor type, and can be set to 80%-90% of the cycle when the motor is operating normally. The target duty cycle interval is the waveform duty cycle interval when the motor is operating normally. The waveform duty cycle interval is an interval extending to the left and right sides of 50%, such as 35%-65%, 30%-70%, etc., which is specifically determined based on the analysis of the Hall signal.
[0084] In one embodiment, the zero-point conflict condition further includes:
[0085] If the cycle time of a second number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle, and the second number is greater than the first number;
[0086] If the duty cycles of the waveforms of the abnormal periods are all within the boundary duty cycle interval, the zero point conflict condition is satisfied. The boundary duty cycle interval is a boundary interval of two preset lengths of the target duty cycle interval.
[0087] In order to improve the detection accuracy, after the zero-point conflict condition is not satisfied for the detection of a first number of consecutive Hall cycles, the embodiment of the present application continues to detect the zero-point conflict condition of the cycle time and waveform duty cycle of a second number of consecutive Hall cycles, where the second number is greater than the aforementioned first number, thereby increasing the detection cycle.
[0088] If the cycle time of a second number of consecutive Hall cycles is less than a preset cycle time, the second number of consecutive Hall cycles are determined to be abnormal cycles. The waveform duty cycles of the abnormal cycles are then compared and determined. If the waveform duty cycles of the abnormal cycles are all within the boundary duty cycle interval, it is determined that the zero point conflict condition is met. The boundary duty cycle interval is the boundary interval of the target duty cycle interval, and the preset length is set to 4%-6%. When the target duty cycle interval is 35%-65%, the boundary duty cycle interval can be set to 35%-40% and 60%-65%.
[0089] By increasing the number of detection cycles, if there are a second number of consecutive abnormal cycles and the duty cycle of each abnormal cycle is within the boundary duty cycle range, it is also judged that the zero point conflict condition is met, and the abnormal cycle with a duty cycle at the edge of the target duty cycle range can be detected, thereby avoiding missed detection.
[0090] In one embodiment, the rotor is controlled to perform a return-to-zero rotation operation, specifically:
[0091] Control the rotor to rotate towards the zero point by a preset number of pulse steps;
[0092] The method also includes:
[0093] If the number of rotation steps of the rotor is greater than or equal to the preset number of pulse steps, or the motor Hall signal is a stall signal, the rotor is controlled to stop rotating and an initialization completion signal is output.
[0094] Specifically, the zero return rotation operation involves the control device rotating toward zero by a preset number of pulse steps, which is greater than the rotor's full range of pulse steps. If the motor Hall signal does not meet the zero detection condition, it indicates that the stop point is in conflict with the torsion spring at the detection zero point, which may be ineffective, or the Hall signal detection is abnormal. At this time, the rotor will perform the zero return rotation operation normally until the number of rotation steps is greater than or equal to the preset number of pulse steps to ensure rotation to the mechanical zero point, or the motor Hall signal is detected as a stall signal, which indicates that the stop point has hit the mechanical zero point. At this time, the rotor is controlled to stop rotating and an initialization completion signal is output.
[0095] In the embodiment of the present application, the return-to-zero rotation operation is set to rotate a preset number of pulse steps to ensure that the expansion valve can also complete the initialization operation when the zero point detection fails.
[0096] Figure 10 The following is a method for controlling the expansion valve zeroing of the expansion valve actuating structure in a preferred embodiment of the present application, specifically comprising:
[0097] Step S1001: in response to the expansion valve being powered on, controlling the rotor to rotate toward the zero point by a preset number of pulse steps;
[0098] Step S1002: Acquire the motor Hall signal;
[0099] Step S1003: If the cycle time of the first number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle, and the waveform duty cycle of the abnormal cycle is outside the target duty cycle range, then step S1006 is executed, otherwise step S1004 is executed;
[0100] Step S1004: If the cycle time of a second number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle, and the waveform duty cycle of the abnormal cycle is within the boundary duty cycle interval, then step S1006 is executed; otherwise, step S1005 is executed; wherein the second number is greater than the first number, and the boundary duty cycle interval is a boundary interval of two preset lengths of the target duty cycle interval;
[0101] Step S1005: If the number of rotation steps of the rotor is greater than or equal to the preset number of pulse steps, or the motor Hall signal is a stall signal, then execute step S1006;
[0102] Step S1006: Control the rotor to stop rotating and output an initialization completion signal.
[0103] The technical solution of the present application further provides a storage medium, which stores computer instructions. When a computer executes the computer instructions, it is used to execute the expansion valve zeroing control method in any of the aforementioned embodiments.
[0104] Figure 11An electronic device of the present application is shown, comprising:
[0105] at least one processor 1101; and,
[0106] A memory 1102 in communication with the at least one processor 1101; wherein,
[0107] The memory 1102 stores instructions that can be executed by the at least one processor 1101. The instructions are executed by the at least one processor 1101 to enable the at least one processor 1101 to perform all steps of the expansion valve zeroing control method in any of the aforementioned method embodiments.
[0108] Figure 11 Take a processor 1101 as an example:
[0109] The electronic device may further include an input device 1103 and an output device 1104 .
[0110] The processor 1101, the memory 1102, the input device 1103 and the output device 1104 may be connected via a bus or other means, with the figure taking the bus connection as an example.
[0111] The memory 1102 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs, and modules, such as program instructions / modules corresponding to the expansion valve zeroing control method in the embodiment of the present application, for example, Figure 8 The processor 1101 executes the non-volatile software programs, instructions and modules stored in the memory 1102 to perform various functional applications and data processing, that is, to implement the expansion valve zeroing control method in the above embodiment.
[0112] The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the expansion valve zeroing control method, etc. In addition, the memory 1102 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1102 may optionally include a memory remotely located relative to the processor 1101, and these remote memories may be connected to the device that executes the expansion valve zeroing control method via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
[0113] The input device 1103 may receive user clicks and generate signal inputs related to user settings and function control of the expansion valve zeroing control method. The output device 1104 may include a display device such as a display screen.
[0114] The one or more modules are stored in the memory 1102 and, when executed by the one or more processors 1101 , execute the expansion valve zeroing control method in any of the above method embodiments.
[0115] The above description is merely the principle and preferred embodiments of the present application. It should be noted that, for those skilled in the art, implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included in the technical scope of the present invention. Based on the principles of the present application, several other variations can be made and should also be considered as the scope of protection of the present application.
Claims
1. An expansion valve actuation structure, characterized in that: include: A fixed base (01) is provided with a mechanical zero point limit block (11) and a detection zero point limit block (12) offset at a preset angle at its top, and a torsion spring bayonet (131) is provided at the lower end of its side wall; a torsion spring (02) sleeved outside the fixed base (01), wherein the lower end of the torsion spring (02) is fixed to the torsion spring bayonet (131), and the upper end thereof is pre-twisted so as to contact the side of the detection zero point limit block (12) facing the mechanical zero point limit block (11); A rotor (03) is located above the fixed base (01), and the rotor (03) is provided with a stop block (31) protruding downward. When the rotor (03) rotates until the valve returns to zero, the stop block (31) hits the upper end of the torsion spring (02). Whether the valve returns to zero is determined by detecting whether the upper end of the torsion spring (02) is hit.
2. The expansion valve actuation structure according to claim 1, characterized in that: A convex ring (13) is provided at the lower end of the side wall of the fixed base (01), and the torsion spring bayonet (131) is provided on the convex ring (13); An upper bending portion is provided at the upper end of the torsion spring (02), and the upper bending portion extends along the axial direction of the fixed base (01) to form an upper axial section (21) and then extends radially inward to form an upper horizontal section (22) that contacts the detection zero point limit block (12); A lower bending portion is provided at the lower end of the torsion spring (02), and the lower bending portion extends along the axial direction of the fixed base (01) to form a lower axial section (23) and then extends along the circumferential direction to form a lower horizontal section (24). The lower axial section (23) is engaged with the torsion spring bayonet (131), and the lower horizontal section (24) contacts the lower surface of the convex ring (13).
3. The expansion valve actuation structure according to claim 2, characterized in that: The height of the upper horizontal section (22) is greater than the height of the detection zero point limit block (12) and is less than or equal to the height of the mechanical zero point limit block (11).
4. The expansion valve actuation structure according to claim 2, characterized in that: The torsion spring (02) is in a stretched state in the axial direction.
5. A method for controlling an expansion valve returning to zero for an expansion valve actuation structure according to any one of claims 1 to 4, characterized in that: include: In response to the expansion valve being powered on, controlling the rotor to perform a return-to-zero rotation operation; Get the motor Hall signal; If the motor Hall signal meets the zero-point conflict condition, the rotor is controlled to stop rotating and an initialization completion signal is output.
6. The expansion valve zero return control method according to claim 5, characterized in that: The zero point conflict conditions specifically include: If the cycle time of a first number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle; If the duty cycles of the waveforms of the abnormal periods are all outside the target duty cycle range, the zero point conflict condition is met.
7. The expansion valve zero return control method according to claim 6, characterized in that: The zero point conflict condition also includes: If the cycle time of a second number of consecutive Hall cycles is less than the preset cycle time, it is determined to be an abnormal cycle, and the second number is greater than the first number; If the duty cycles of the waveforms of the abnormal period are all within a boundary duty cycle interval, the zero point conflict condition is satisfied. The boundary duty cycle interval is a boundary interval of two preset lengths of the target duty cycle interval.
8. The expansion valve zero return control method according to any one of claims 5 to 7, characterized in that: The control rotor performs a return-to-zero rotation operation, specifically: Control the rotor to rotate towards the zero point by a preset number of pulse steps; The method further comprises: If the number of rotation steps of the rotor is greater than or equal to the preset number of pulse steps, or the motor Hall signal is a stall signal, the rotor is controlled to stop rotating and an initialization completion signal is output.
9. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute the expansion valve zeroing control method according to any one of claims 4 to 8.
10. An electronic device, characterized in that: comprising at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the expansion valve zeroing control method according to any one of claims 4 to 8.