Brushless motor valve

Abstract

The application provides a brushless motor valve. The brushless motor valve comprises a liquid inlet pipe, a liquid outlet pipe, a sliding stopper, a sealed cabin, a rotor, a coil, a magnetic position sensor, a push-up screw rod pair, a damper, a bearing, a detection magnet, a protection spring and a circuit board. The sealed cabin forms an accommodating cavity, the liquid inlet pipe and the liquid outlet pipe are communicated with the accommodating cavity, the rotor is used for working under the action of the coil to push the sliding stopper to block the communication position of the liquid inlet pipe and the liquid outlet pipe, the magnetic position sensor is electrically connected with the circuit board, the push-up screw rod pair forms a connecting hole and a receiving cavity which are communicated, the connecting hole is communicated with the accommodating cavity, the sliding stopper is arranged in the connecting hole and connected with the push-up screw rod pair, the detection magnet is arranged in the connecting cavity and connected with the push-up screw rod pair, the detection magnet is coaxially arranged with the rotor, the circuit board is electrically connected with the coil, and the circuit board is also electrically connected with an external power supply and an MCU. The brushless motor valve has good convenience and good adjustment performance.

Description

Technical Field

[0001] This invention relates to the technical field of brushless motor valves, and in particular to a brushless motor valve. Background Technology

[0002] A brushless motor valve is a pipeline accessory used to open and close pipelines, control flow direction, and regulate and control the parameters of the conveyed medium. Brushless motor valves are widely used in air conditioners, refrigerators, and water heaters. A brushless motor valve consists of a sealed chamber, an inlet pipe, and an outlet pipe, with the sealed chamber connected to both the inlet and outlet pipes.

[0003] For example, a traditional brushless motor valve, such as the electric valve proposed in Chinese patent CN201180049850.5, has a structure including a valve seat assembly, a rotor assembly, and a valve needle screw assembly. The valve seat assembly includes a valve seat with a valve cavity and a valve core seat with a valve port fixed on the valve seat. The valve needle screw assembly includes a screw and a valve needle driven by the screw. The electric valve also includes a nut assembly, which includes a nut and a connecting piece. The nut is a hollow annular structure, including a positioning guide near the valve seat assembly, a nut connecting part near the rotor assembly, and a support part for fixing the connecting piece. This electric valve makes it easy to ensure the coaxiality between the nut, the valve needle screw assembly, and the valve port of the valve core seat, avoiding problems such as poor valve port sealing or eccentric wear of the valve port, thus improving the operational reliability of the electric valve.

[0004] However, because the aforementioned electric valve lacks a component to provide feedback on the rotor assembly's position when power is lost, the operator cannot determine the rotor assembly's exact position when power is off. This necessitates a "zeroing" operation on the rotor assembly before each use to reset it, resulting in poor usability. Furthermore, the lack of a feedback component for the rotor assembly's position when power is lost prevents the operator from determining the valve needle's position and thus the valve's opening / closing size. Consequently, the operator cannot adjust the valve's opening / closing size via the rotor assembly, making it impossible to regulate the flow rate of the medium at the valve port. This further reduces the valve's adjustability. Therefore, traditional brushless motor valves suffer from both poor usability and poor adjustability. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a brushless motor valve that is easy to use and has good adjustable performance.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A brushless motor valve includes an inlet pipe, an outlet pipe, a sliding stop, a sealed chamber, a rotor, and a coil. The sealed chamber forms a receiving cavity, and both the inlet pipe and the outlet pipe communicate with the receiving cavity. A portion of the sliding stop is located within the receiving cavity, the rotor is located within the receiving cavity, and the coil is located outside the receiving cavity and sleeved on the sealed chamber. The center of the rotor is at a height equal to the center of the coil at a height equal to the bottom surface of the sealed chamber. The rotor is used to work under the action of the coil to push the sliding stop to block the connection between the inlet pipe and the outlet pipe. The brushless motor valve also includes a magnetic position sensor, a push screw pair, a damper, a bearing, a detection magnet, a protective spring, and a circuit board.

[0008] The magnetic position sensor is located outside the receiving cavity and is electrically connected to the circuit board;

[0009] The push screw assembly, the damper, and the bearing are all located within the receiving cavity. The push screw assembly, the damper, and the bearing are all movably connected to the sealed chamber. The push screw assembly has a connecting hole and a receiving cavity that are connected together. The connecting hole is connected to the receiving cavity. The sliding stop is inserted through the connecting hole and connected to the push screw assembly. The push screw assembly is connected to the rotor. The push screw assembly is movably connected to the damper and the bearing, respectively. A connecting cavity is formed on the side of the push screw assembly away from the sliding stop, and the connecting cavity is connected to the receiving cavity.

[0010] The detection magnet is located inside the connecting cavity and is connected to the push screw pair; the detection magnet is coaxially arranged with the rotor.

[0011] The protective spring is located inside the storage cavity, one end of the protective spring is connected to the inner wall of the storage cavity, and the other end of the protective spring is elastically connected to the sliding stop.

[0012] The circuit board is located outside the receiving cavity. The circuit board is electrically connected to the coil. The circuit board is also used to electrically connect to an external power supply and an MCU.

[0013] In one embodiment, the push screw assembly includes a screw and a top block connected together. The top block is slidably connected to the sealed chamber. The connecting hole and the receiving cavity are both formed in the top block. The sliding stop is connected to the top block. The screw is connected to the rotor. The screw is movably connected to the damper and the bearing respectively. The connecting cavity is formed in the screw. The screw is connected to the detection magnet.

[0014] In one embodiment, the top block has a mounting cavity formed on the side opposite to the sliding stop, the mounting cavity is connected to the receiving cavity, and the inner wall of the mounting cavity is provided with internal threads.

[0015] In one embodiment, one end of the lead screw is provided with an external thread, and the internal thread is threadedly connected to the external thread so that the top block is threadedly connected to the lead screw.

[0016] In one embodiment, the lead screw includes a rod body and a boss connected together, the external thread is provided at one end of the rod body away from the boss, the rod body is threadedly connected to the top block, the rod body is connected to the rotor, the rod body is movably connected to the damper and the bearing respectively, the connecting cavity is formed in the boss, and the boss is connected to the detection magnet.

[0017] In one embodiment, the inner wall of the storage cavity is provided with a mounting body, the protective spring is sleeved on the mounting body, and the mounting body is movably connected to the sliding stop.

[0018] In one embodiment, the sliding stop has a connecting groove, and a portion of the mounting body is located within the connecting groove and is movably connected to the sliding stop.

[0019] In one embodiment, there are two dampers and two bearings, with the two dampers arranged opposite each other and the two bearings arranged opposite each other, and each damper located between the rotor and one of the bearings.

[0020] In one embodiment, the circuit board is provided with a power supply interface for electrical connection to the external power source.

[0021] In one embodiment, the sealed chamber, the inlet pipe, and the outlet pipe are integrally formed, and the angle between the extending direction of the inlet pipe and the extending direction of the outlet pipe is 90°.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] 1. Because the brushless motor valve is equipped with a magnetic position sensor, the magnetic position sensor detects the magnetic field of a detection magnet to determine the rotational position of the detection magnet, thereby determining the rotational angle of the detection magnet, and thus obtaining the rotational position and angle of the rotor. This means the magnetic position sensor is constantly sensing the position of the detection magnet to obtain the rotor's position information at all times. The magnetic position sensor transmits the sensed rotor position information to the MCU. The MCU records the rotor position information in RAM. When the rotor is powered off, the MCU writes the rotor position information into NVM. In other words, the magnetic position sensor is used to feed back the rotor's position to the MCU. The position information during the movement, that is, the magnetic position sensor is the element that feeds back the position information of the rotor when the power is off. Furthermore, the brushless motor valve is equipped with a magnetic position sensor for feeding back the position information of the rotor when the power is off. The circuit board is also used to electrically connect to the MCU so that the position information of the rotor is transmitted to the MCU through the circuit board. The display is used to display the specific position information of the rotor in the NVM when the power is off, that is, the display is used to display the specific angle of the rotor rotation in the NVM for the operator to view. This allows the operator to obtain the specific position of the rotor when the power is off through the display, so that the brushless motor valve can be used without the need to "zero" the rotor before each use, thus making the brushless motor valve more convenient to use.

[0024] 2. Because the brushless motor valve is equipped with a magnetic position sensor for feedback of the rotor's position information when the power is off, and the circuit board is also used to electrically connect to the MCU, the rotor's position information is transmitted to the MCU through the circuit board. The display is used to display the specific position information of the rotor in the NVM when the power is off, that is, the display is used to display the specific angle of the rotor rotation in the NVM for the operator to view. The operator can obtain the specific position of the rotor when the power is off through the display, thereby obtaining the specific position of the sliding stop, that is, the operator can obtain the opening and closing size of the connection between the inlet pipe and the outlet pipe. This allows the operator to adjust the opening and closing size of the connection between the inlet pipe and the outlet pipe by the rotor, thereby enabling the brushless motor valve to adjust the flow rate of the conveying medium at the connection between the inlet pipe and the outlet pipe, thus making the brushless motor valve have good adjustability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a brushless motor valve according to one embodiment;

[0027] Figure 2 for Figure 1 The image shows a cross-sectional view along line AA in the brushless motor valve.

[0028] Figure 3 for Figure 1 The diagram shows the exploded structure of a brushless motor valve.

[0029] Figure 4 , Figure 5 and Figure 6 These are circuit diagrams of a brushless motor valve, representing one embodiment.

[0030] Figure 7 for Figure 1 The diagram shows the structure of the rotor of the brushless motor valve. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] This invention provides a brushless motor valve, including an inlet pipe, an outlet pipe, a sliding stop, a sealed chamber, a rotor, and a coil. The sealed chamber forms a receiving cavity, and both the inlet pipe and the outlet pipe are connected to the receiving cavity. A portion of the sliding stop is located inside the receiving cavity, the rotor is located inside the receiving cavity, and the coil is located outside the receiving cavity and is sleeved on the sealed chamber. The center of the rotor is at the same height as the center of the coil. The rotor is used to work under the action of the coil to push the sliding stop to block the connection between the inlet pipe and the outlet pipe.

[0035] Furthermore, the brushless motor valve also includes: a magnetic position sensor, a push screw assembly, a damper, a bearing, a detection magnet, a protective spring, and a circuit board. The magnetic position sensor is located outside the receiving cavity and is electrically connected to the circuit board. The push screw assembly, damper, and bearing are all located inside the receiving cavity and are movably connected to the sealed chamber. The push screw assembly forms a connecting hole and a receiving cavity, with the connecting hole communicating with the receiving cavity. A sliding stop is inserted through the connecting hole and connected to the push screw assembly. The push screw assembly is connected to the rotor and movably connected to the damper and bearing. A connecting cavity is formed on the side of the push screw assembly opposite to the sliding stop, communicating with the receiving cavity. The detection magnet is located inside the connecting cavity and connected to the push screw assembly, coaxially arranged with the rotor. The protective spring is located inside the receiving cavity, with one end connected to the inner wall of the receiving cavity and the other end elastically connected to the sliding stop. The circuit board is located outside the cavity and is electrically connected to the coil. The circuit board is also used to electrically connect to the external power supply and the MCU.

[0036] The aforementioned brushless motor valve incorporates a magnetic position sensor. This sensor detects the magnetic field of a magnet to determine its rotational position and, consequently, the rotational angle of the magnet. This allows the magnetic position sensor to constantly monitor the magnet's position and obtain the rotor's position information. The sensor transmits this information to the MCU, which records the rotor's position in RAM. When power is lost, the MCU writes the rotor's position information into the NVM (Network Virtual Machine). In other words, the magnetic position sensor provides feedback to the MCU. The magnetic position sensor is used to feed the rotor's position information during its movement. In other words, the magnetic position sensor is a component that feeds back the rotor's position information when it is powered off. Furthermore, the brushless motor valve is equipped with a magnetic position sensor for feeding back the rotor's position information when it is powered off. The circuit board is also used to electrically connect to the MCU so that the rotor's position information can be transmitted to the MCU through the circuit board. The display is used to display the specific position information of the rotor in the NVM when it is powered off, that is, the display is used to display the specific angle of the rotor's rotation in the NVM for the operator to view. This allows the operator to obtain the specific position of the rotor when it is powered off through the display, so that the brushless motor valve can be used without "zeroing" the rotor before each use, thus making the brushless motor valve more convenient to use. Because the brushless motor valve is equipped with a magnetic position sensor to provide feedback on the rotor's position when it is powered off, and the circuit board is also electrically connected to the MCU, the rotor's position information is transmitted to the MCU via the circuit board. The display shows the specific position information of the rotor in the NVM when it is powered off, that is, the display shows the specific angle of the rotor's rotation in the NVM for the operator to view. This allows the operator to obtain the specific position of the rotor when it is powered off through the display, thereby allowing the operator to obtain the specific position of the sliding stop, that is, the opening and closing size of the connection between the inlet and outlet pipes. This allows the operator to adjust the opening and closing size of the connection between the inlet and outlet pipes by adjusting the rotor, thus enabling the brushless motor valve to adjust the flow rate of the conveying medium at the connection between the inlet and outlet pipes, resulting in better adjustability of the brushless motor valve.

[0037] To better understand the technical solution and beneficial effects of the present invention, the present invention will be further described in detail below with reference to specific embodiments:

[0038] like Figures 1 to 3As shown, in one embodiment, the brushless motor valve 10 is electrically connected to an MCU (Microcontroller Unit, referring to a single-chip microcomputer). In this embodiment, the MCU is an external processing device of the brushless motor valve 10 and is not a component of the brushless motor valve 10. The MCU is electrically connected to a display. The MCU is equipped with RAM (Random Access Memory, equivalent to main memory) and NVM (Non-volatile Memory, equivalent to a hard disk). In one embodiment, NVM is divided into two types of storage media: flash and EEPROM.

[0039] Furthermore, the brushless motor valve 10 includes an inlet pipe 100, an outlet pipe 200, a sliding stop 300, a sealed chamber 400, a rotor 500, and a coil 600. The sealed chamber 400 forms a receiving cavity 410. The inlet pipe 100 and the outlet pipe 200 are both connected to the receiving cavity 410. A portion of the sliding stop 300 is located inside the receiving cavity 410. The rotor 500 is located inside the receiving cavity 410. The coil 600 is located outside the receiving cavity 410 and is sleeved on the sealed chamber 400. The center of the rotor 500 is at a height equal to the center of the coil 600 at a height equal to the bottom surface of the sealed chamber 400. The rotor 500 is used to work under the action of the coil 600 to push the sliding stop 300 to block the connection between the inlet pipe 100 and the outlet pipe 200.

[0040] Furthermore, the brushless motor valve 10 also includes: a magnetic position sensor 700, a push screw assembly 800, a damper 900, a bearing 900a, a detection magnet 900d, a protective spring 900b, and a circuit board 900c. The magnetic position sensor 700 is located outside the receiving cavity 410 and is electrically connected to the circuit board 900c. The push screw assembly 800, damper 900, and bearing 900a are all located within the receiving cavity 410. The push screw assembly 800, damper 900, and bearing 900a are all movably connected to the sealed chamber 400. The push screw assembly 800 has a connecting hole 821 and a receiving cavity 822 that are connected. The connecting hole 821 is connected to the receiving cavity 410. The sliding stop 300 passes through the connecting hole 821 and is connected to the push screw assembly 800. The push screw assembly 800 is connected to the rotor 500. The push screw assembly 800 is movably connected to the damper 900 and the bearing 900a respectively. A connecting cavity 8121 is formed on the side of the push screw assembly 800 away from the sliding stop 300. The connecting cavity 8121 is connected to the receiving cavity 410. The detection magnet 900d is located inside the connecting cavity 8121 and connected to the push screw pair 800. The detection magnet 900d is coaxially arranged with the rotor 500. The protective spring 900b is located inside the receiving cavity 822. One end of the protective spring 900b is connected to the inner wall of the receiving cavity 822, and the other end of the protective spring 900b is elastically connected to the sliding stop 300. The circuit board 900c is located outside the receiving cavity 410. The circuit board 900c is electrically connected to the coil 600, and the circuit board 900c is also used for electrical connection to the external power supply and the MCU.

[0041] In this embodiment, both the inlet pipe 100 and the outlet pipe 200 are connected to the receiving cavity 410, so that the brushless motor valve 10 forms a conductive flow channel. The height of the center of the rotor 500 from the bottom surface of the sealed chamber 400 is equal to the height of the center of the coil 600 from the bottom surface of the sealed chamber 400, that is, the rotor 500 and the coil 600 are at the same horizontal height.

[0042] The detection magnet 900d is coaxially arranged with the rotor 500 so that the central axis of the detection magnet 900d coincides with the central axis of the rotor 500, that is, the rotation angle of the detection magnet 900d is equal to the rotation angle of the rotor 500. The magnetic position sensor 700 is used to sense the rotation angle of the detection magnet 900d to obtain the rotation angle of the rotor 500.

[0043] Circuit board 900c is used to connect to an external power source, making coil 600 conductive. According to the principle of electromagnetism, a circular magnetic field will be generated around coil 600. The rotor is a magnetic structure. According to the principle of magnetic attraction, the circular magnetic field around coil 600 can attract rotor 500 to move, so that rotor 500 rotates. Thus, coil 600 is energized and works to drive rotor 500 to rotate. Rotor 500 drives push screw pair 800 to move. Push screw pair 800 drives sliding stop 300 to move, so that rotor 500, under the action of coil 600, pushes sliding stop 300 to block the connection between inlet pipe 100 and outlet pipe 200. The magnetic position sensor 700 is electrically connected to the circuit board 900c to enable it to conduct and enter the working state. The magnetic position sensor 700 constantly senses and detects the position of the magnet 900d to obtain the position information of the rotor 500. The position information of the rotor 500 refers to the rotation angle of the rotor 500 within the receiving cavity 410. The rotation angle of the rotor 500 is equal to the rotation angle of the detection magnet 900d. The magnetic position sensor 700 transmits the sensed rotation angle of the detection magnet 900d to the MCU so that the MCU can obtain the position information of the detection magnet 900d, that is, the MCU obtains the position information of the rotor 500. The MCU records the rotor position information in RAM. When the rotor is powered off, the MCU writes the rotor position information into NVM.

[0044] Furthermore, when the coil 600 is de-energized, the rotor 500 is in a power-off state and stops rotating. The magnetic position sensor 700 is electrically connected to the circuit board 900c. At this time, the magnetic position sensor 700 is used to provide feedback on the position information of the detection magnet 900d when the rotor 500 is de-energized, that is, the magnetic position sensor 700 is used to provide feedback on the rotation angle of the detection magnet 900d to obtain the rotation angle of the rotor 500. The circuit board 900c is also used to be electrically connected to the MCU so that the rotation angle of the rotor 500 is transmitted to the MCU through the circuit board 900c. The MCU is used to be electrically connected to the display, and the display is used to display the specific position information of the rotor 500 in the NVM when it is de-energized, that is, the display is used to display the specific rotation angle of the rotor 500 in the NVM for the operator to view. In one embodiment, the display is an external device of the MCU. In one embodiment, when the display shows that the rotor 500 has rotated 540°, meaning the rotor 500 has completed 1.5 revolutions from start to stop, the angle within each revolution is 180°. The rotor 500 has completed the first revolution and is halfway through the second. Therefore, the rotation angle of the rotor 500 sensed by the magnetic position sensor 700 and displayed on the screen allows the operator to clearly obtain the specific position information of the rotor 500. The magnetic position sensor 700 is used for closed-loop control of the brushless motor valve 10, meaning the brushless motor valve 10 controls the rotor 500 using vector control, which offers higher precision.

[0045] Furthermore, Figure 4 , Figure 5 and Figure 6 All are circuit diagrams of brushless motor valve 10.

[0046] The brushless motor valve 10 described above is equipped with a magnetic position sensor 700. The magnetic position sensor 700 detects the magnetic field of the detection magnet 900d to determine the rotational position of the detection magnet 900d, thereby determining the rotational angle of the detection magnet 900d and thus obtaining the rotational position and angle of the rotor 500. This ensures that the magnetic position sensor 700 constantly senses the position of the detection magnet 900d, thus constantly obtaining the position information of the rotor 500. Furthermore, the magnetic position sensor 700 continuously senses the position information of the rotor 500 during its movement. The magnetic position sensor 700 transmits the sensed rotor 500 position information to the MCU. The MCU records the rotor 500 position information in RAM. When the rotor is powered off, the MCU writes the rotor 500 position information into the NVM. The magnetic position sensor 700 is used to feed back the position information of the rotor 500 during its movement to the MCU. In other words, the magnetic position sensor 700 is a component that feeds back the position information of the rotor 500 when it is powered off. Furthermore, the brushless motor valve 10 is equipped with a magnetic position sensor 700 for feeding back the position information of the rotor 500 when it is powered off. The circuit board 900c is also used to electrically connect to the MCU so that the position information of the rotor 500 is transmitted to the MCU through the circuit board 900c. The display is used to display the specific position information of the rotor 500 in the NVM when it is powered off, that is, the display is used to display the specific angle of rotation of the rotor 500 in the NVM for the operator to view. This allows the operator to obtain the specific position of the rotor 500 when it is powered off through the display, so that the brushless motor valve 10 can be used without "zeroing" the rotor 500 before each use, thus making the brushless motor valve 10 more convenient to use. Because the brushless motor valve 10 is equipped with a magnetic position sensor 700 for feedback of the position information of the rotor 500 when it is powered off, and the circuit board 900c is also used to electrically connect with the MCU, so that the position information of the rotor 500 is transmitted to the MCU through the circuit board 900c. The display is used to display the specific position information of the rotor 500 in the NVM when it is powered off, that is, the display is used to display the specific angle of rotation of the rotor 500 in the NVM for the operator to view. The operator can obtain the specific position of the rotor 500 when it is powered off through the display, so that the operator can obtain the specific position of the sliding stop 300, that is, the operator can obtain the opening and closing size of the connection between the inlet pipe 100 and the outlet pipe 200. So that the operator can adjust the opening and closing size of the connection between the inlet pipe 100 and the outlet pipe 200 through the rotor 500, so that the brushless motor valve 10 can adjust the flow rate of the conveying medium at the connection between the inlet pipe 100 and the outlet pipe 200, thereby making the adjustability of the brushless motor valve 10 better.

[0047] like Figures 1 to 3As shown, in one embodiment, the push screw assembly 800 includes a lead screw 810 and a push block 820 connected together. The push block 820 is slidably connected to the sealed chamber 400. A connecting hole 821 and a receiving cavity 822 are both formed in the push block 820. A sliding stop 300 is connected to the push block 820. The lead screw 810 is connected to the rotor 500. The lead screw 810 is movably connected to the damper 900 and the bearing 900a respectively. A connecting cavity 8121 is formed in the lead screw 810. The lead screw 810 is connected to the detection magnet 900d. In this embodiment, the rotor 500 drives the lead screw 810 to move, and the lead screw 810 drives the push block 820 to slide up and down in the receiving cavity 410, so that the sliding stop 300 slides up and down in the receiving cavity 410, making the adjustable performance of the sliding stop 300 better, thereby making the adjustable performance of the brushless motor valve 10 better.

[0048] like Figures 1 to 3 As shown, in one embodiment, the top block 820 has a mounting cavity 823 formed on the side opposite to the sliding stop 300. The mounting cavity 823 communicates with the receiving cavity 410, and the inner wall of the mounting cavity 823 is provided with an internal thread 8231. In this embodiment, the mounting cavity 823 and the receiving cavity 822 are arranged opposite to each other, that is, the lead screw 810 and the sliding stop 300 are arranged opposite to each other, so that the central axis of the lead screw 810 coincides with the central axis of the sliding stop 300, thereby making the coaxiality between the lead screw 810 and the sliding stop 300 better, and thus making the structural stability of the brushless motor valve 10 better.

[0049] like Figures 1 to 3 As shown, in one embodiment, one end of the lead screw 810 is provided with an external thread 8111, and the internal thread 8231 is threadedly connected to the external thread 8111, so that the top block 820 is threadedly connected to the lead screw 810, making the top block 820 and the lead screw 810 detachably connected. This makes it easy to disassemble the top block 820 and the lead screw 810, so that when the top block 820 or the lead screw 810 is damaged, the operator can quickly replace the damaged component, thereby extending the service life of the brushless motor valve 10 and reducing the operating cost of the brushless motor valve 10.

[0050] like Figures 1 to 3As shown, in one embodiment, the lead screw 810 includes a rod body 811 and a boss 812 connected to each other. An external thread 8111 is provided at one end of the rod body 811 away from the boss 812. The rod body 811 is threadedly connected to the top block 820. The rod body 811 is connected to the rotor 500. The rod body 811 is movably connected to the damper 900 and the bearing 900a respectively. A connecting cavity 8121 is formed in the boss 812. The boss 812 is connected to the detection magnet 900d. In this embodiment, the rod 811 is movably connected to the damper 900 and the bearing 900a respectively, so that the rod 811 is detachably connected to the damper 900 and the bearing 900a respectively. This makes it easy for the operator to remove the damper 900 and the bearing 900a from the rod 811 when they are damaged while moving with the rod 811, which facilitates the replacement of the damper 900 and the bearing 900a and makes the brushless motor valve 10 more convenient to use.

[0051] like Figures 1 to 3 As shown, in one embodiment, a mounting body 8221 protrudes from the inner wall of the receiving cavity 822, and a protective spring 900b is sleeved on the mounting body 8221. The mounting body 8221 is movably connected to the sliding stop 300. In this embodiment, the protective spring 900b is sleeved on the mounting body 8221 to fix the position of the protective spring 900b, making it difficult for the position of the protective spring 900b to shift when compressed by the sliding stop 300. This facilitates the reset of the protective spring 900b, improves the adjustability of the sliding stop 300, and consequently improves the adjustability of the brushless motor valve 10.

[0052] like Figures 1 to 3 As shown, in one embodiment, the sliding stop 300 is formed with a connecting groove 310. Part of the mounting body 8221 is located in the connecting groove 310 and is movably connected to the sliding stop 300, so that the mounting body 8221 is sleeved with the sliding stop 300, and the sliding stop 300 slides up and down relative to the mounting body 8221 to adjust its own position, thereby making the adjustable performance of the sliding stop 300 better, and thus making the adjustable performance of the brushless motor valve 10 better.

[0053] like Figures 1 to 3 As shown, in one embodiment, there are two dampers 900 and two bearings 900a. The two dampers 900 are arranged opposite each other, and the two bearings 900a are arranged opposite each other. Each damper 900 is located between the rotor 500 and one of the bearings 900a. In this embodiment, the bearing 900a is used to support the rotation of the rod 811, reducing the coefficient of friction of the rod 811 during rotation. This results in less frictional force on the rod 811 during rotation, making it easier for the rod 811 to be driven by the rotor 500, thereby increasing the efficiency of the brushless motor valve 10.

[0054] like Figures 1 to 3 As shown, in one embodiment, the circuit board 900c is provided with a power supply interface 901, which is used to connect to an external power source so that the circuit board 900c is powered on, so that the coil 600 is turned on, thereby causing the coil 600 to work and drive the rotor 500 to move to push the sliding stop 300 to slide up and down. Thus, the rotor 500 works under the action of the coil 600 to push the sliding stop 300 to block the connection between the inlet pipe 100 and the outlet pipe 200, thereby making the adjustable performance of the brushless motor valve 10 better.

[0055] like Figures 1 to 3 As shown, in one embodiment, the sealed chamber 400, the inlet pipe 100, and the outlet pipe 200 are integrally formed, and the angle between the extending direction of the inlet pipe 100 and the extending direction of the outlet pipe 200 is 90°. In this embodiment, the integrally formed structure of the sealed chamber 400, the inlet pipe 100, and the outlet pipe 200 strengthens the structural strength of the brushless motor valve 10, thereby improving its structural stability.

[0056] Furthermore, the angle between the extension direction of the inlet pipe 100 and the extension direction of the outlet pipe 200 is 90°, that is, the cross-section of the connection between the inlet pipe 100 and the outlet pipe 200 is right-angled, which makes it easy for the sliding stop 300 to block the connection between the inlet pipe 100 and the outlet pipe 200, thereby making the sliding stop 300 easier to use, and thus making the brushless motor valve 10 easier to use.

[0057] Understandably, after the coil 600 is de-energized, the rotor 500 is in a de-energized state and stops rotating. Since the rotor 500 is movably connected to the sealed chamber 400, after the rotor 500 stops rotating, it is affected by inertia, causing the rotor 500 to continue to deflect within the receiving cavity 410. This results in poor positioning accuracy of the rotor 500, which in turn makes the brushless motor valve 10 less convenient to use.

[0058] like Figure 7As shown, further, in order to overcome the problem of poor positional accuracy of the rotor 500, in one embodiment, the rotor 500 is provided with a plurality of protrusions 510, which are evenly distributed at intervals. A blocking member 411 is provided on the inner wall of the receiving cavity 410, and an abutment groove 511 is formed between two adjacent protrusions 510. Each abutment groove 511 communicates with the receiving cavity 410. Part of the blocking member 411 is located in the abutment groove 511 and abuts against the rotor 500, so that the blocking member 411 is used to prevent the rotor 500 from continuing to rotate due to inertia. After the rotor 500 stops rotating, it is difficult for the rotor 500 to continue to deflect within the receiving cavity 410, thereby improving the positional accuracy of the rotor 500 and making the brushless motor valve 10 easier to use.

[0059] Furthermore, if the number of protrusions 510 is m, then the number of abutment grooves 511 is m-1, where m is a positive integer greater than or equal to 3.

[0060] Furthermore, the cross-section of the abutment groove 511 is rectangular, so that the abutment area of ​​the cross-section of the abutment groove 511 is larger, and the connection area between the blocking member 411 and the rotor 500 is larger. This makes the fit between the blocking member 411 and the rotor 500 better, and thus the positional accuracy of the rotor 500 is better. This makes the positional accuracy of the sliding stop member 300 better, and thus the adjustability of the brushless motor valve 10 is better.

[0061] Furthermore, when the blocking member 411 abuts against the inner wall of the abutment groove 511, the position of the rotor 500 is fixed, and the rotor 500 cannot continue to rotate along the previous rotation direction, so that the rotor 500 has good stability in the receiving cavity 410, thereby making the overall stability of the brushless motor valve 10 better.

[0062] Furthermore, the damper 900 is movably connected to the rod 811. When the rotor 500 stops rotating, the rod 811 stops rotating along with the rotor 500. The damper 900 stops rotating along with the rod 811. The damper 900 is used to record the position of the rotor 500 when the power is off. The damper 900 is used in conjunction with the magnetic position sensor 700 to make the position information of the rotor 500 more accurate, thereby making the adjustability of the brushless motor valve 10 better.

[0063] Furthermore, when the rotor 500 loses power, it stops rotating, and the rod 811 stops rotating along with it. This causes the damper 900 to prevent the rod 811 from rotating under external force. The damper 900 acts to fix the rod 811 in its stopped position, thereby fixing the position of the rotor 500 and preventing it from rotating under external force when the power is off. This prevents external force from driving the rotor 500 to rotate, ensuring that the brushless motor valve 10 can only operate by conducting electricity through the coil 600 to drive the rotor 500 to rotate. This results in better accuracy of the rotor 500 position information recorded in the NVM. In this embodiment, the damper 900 is a friction damper.

[0064] In one embodiment, the magnetic position sensor 700 is located within the receiving cavity 410, connected to the rotor 500, and situated on the outer ring of the rotor 500. This allows the magnetic position sensor 700 to directly detect the rotation angle of the rotor 500, thereby improving the ease of use of the brushless motor valve 10. In this embodiment, the boss 812 does not require a detection magnet, resulting in lower operating costs for the brushless motor valve 10.

[0065] Furthermore, in one embodiment, the angle of one revolution of the rotor 500 is divided into n parts, that is, 360° is divided into n equally spaced sector regions. The magnetic position sensor 700 is used to detect the position of the rotor 500, so that the range of rotation of the rotor 500 caused by external force when the power is off is smaller, thereby reducing the error rate of the position information of the rotor 500 and improving the position accuracy of the rotor 500. This results in better adjustability of the brushless motor valve 10, where n is a positive integer greater than or equal to 3.

[0066] It is understandable that the traditional brushless motor valve 10 cannot detect the specific position of the rotor 500 when it loses power. The rotor 500 is more likely to rotate under the action of external force, which makes it easier for the rotor 500 to lose steps. This results in a deviation between the actual position relationship of the rotor and the theoretical position relationship, making the position accuracy of the rotor 500 poor.

[0067] The brushless motor valve 10 is equipped with a magnetic position sensor 700, which constantly senses and detects the position of the magnet 900d to obtain the position information of the rotor 500 at all times. This ensures that the actual position relationship of the rotor 500 is consistent with the theoretical position relationship, thereby improving the position accuracy of the rotor 500.

[0068] Compared with the prior art, the present invention has at least the following advantages:

[0069] 1. Because the brushless motor valve 10 is equipped with a magnetic position sensor 700, the magnetic position sensor 700 detects the magnetic field of the detection magnet 900d to obtain the rotational position of the detection magnet 900d, thereby determining the rotational angle of the detection magnet 900d, and thus obtaining the rotational position and rotational angle of the rotor 500. This ensures that the magnetic position sensor 700 constantly senses the position of the detection magnet 900d to obtain the position information of the rotor 500 at all times. Furthermore, the magnetic position sensor 700 constantly senses the position information of the rotor 500 during its movement. The magnetic position sensor 700 transmits the sensed rotor 500 position information to the MCU. The MCU records the rotor 500 position information in RAM. When the rotor is powered off, the MCU writes the rotor 500 position information into NVM. In other words, the magnetic position sensor 700 is used to transmit the rotor 500 position information to the MCU. The magnetic position sensor 700 is used to provide feedback on the position information of the rotor 500 during its movement. In other words, the magnetic position sensor 700 is a component that provides feedback on the position information of the rotor 500 when it is powered off. Furthermore, the brushless motor valve 10 is equipped with a magnetic position sensor 700 for providing feedback on the position information of the rotor 500 when it is powered off. The circuit board 900c is also used to electrically connect to the MCU so that the position information of the rotor 500 is transmitted to the MCU through the circuit board 900c. The display is used to display the specific position information of the rotor 500 in the NVM when it is powered off, that is, the display is used to display the specific angle of rotation of the rotor 500 in the NVM for the operator to view. This allows the operator to obtain the specific position of the rotor 500 when it is powered off through the display, so that the brushless motor valve 10 can be used without "zeroing" the rotor 500 before each use, thus making the brushless motor valve 10 more convenient to use.

[0070] 2. Because the brushless motor valve 10 is equipped with a magnetic position sensor 700 for feedback of the position information of the rotor 500 when it is powered off, and the circuit board 900c is also used to electrically connect with the MCU, so that the position information of the rotor 500 is transmitted to the MCU through the circuit board 900c. The display is used to display the specific position information of the rotor 500 in the NVM when it is powered off, that is, the display is used to display the specific angle of rotation of the rotor 500 in the NVM for the operator to view. The operator can obtain the specific position of the rotor 500 when it is powered off through the display, so that the operator can obtain the specific position of the sliding stop 300, that is, the operator can obtain the opening and closing size of the connection between the inlet pipe 100 and the outlet pipe 200. So that the operator can adjust the opening and closing size of the connection between the inlet pipe 100 and the outlet pipe 200 through the rotor 500, so that the brushless motor valve 10 can adjust the flow rate of the conveying medium at the connection between the inlet pipe 100 and the outlet pipe 200, thereby making the adjustability of the brushless motor valve 10 better.

[0071] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A brushless motor valve, comprising an inlet pipe, an outlet pipe, a sliding stop, a sealed chamber, a rotor, and a coil, wherein the sealed chamber forms a receiving cavity, the inlet pipe and the outlet pipe are both connected to the receiving cavity, a portion of the sliding stop is located within the receiving cavity, the rotor is located within the receiving cavity, the coil is located outside the receiving cavity, and the coil is sleeved on the sealed chamber, the center of the rotor is at a height equal to the center of the coil is at a height equal to the bottom surface of the sealed chamber, the rotor is used to operate under the action of the coil to push the sliding stop to seal the connection between the inlet pipe and the outlet pipe, characterized in that... The brushless motor valve also includes: a magnetic position sensor, a push screw pair, a damper, a bearing, a detection magnet, a protective spring, and a circuit board; The magnetic position sensor is located outside the receiving cavity and is electrically connected to the circuit board; The push screw assembly, the damper, and the bearing are all located within the receiving cavity. The push screw assembly, the damper, and the bearing are all movably connected to the sealed chamber. The push screw assembly has a connecting hole and a receiving cavity that are connected together. The connecting hole is connected to the receiving cavity. The sliding stop is inserted through the connecting hole and connected to the push screw assembly. The push screw assembly is connected to the rotor. The push screw assembly is movably connected to the damper and the bearing, respectively. A connecting cavity is formed on the side of the push screw assembly away from the sliding stop, and the connecting cavity is connected to the receiving cavity. The detection magnet is located inside the connecting cavity and is connected to the push screw pair; the detection magnet is coaxially arranged with the rotor. The protective spring is located inside the storage cavity, one end of the protective spring is connected to the inner wall of the storage cavity, and the other end of the protective spring is elastically connected to the sliding stop. The circuit board is located outside the receiving cavity, and the circuit board is electrically connected to the coil. The circuit board is also used to electrically connect to an external power supply and an MCU. The rotor is provided with multiple protrusions, which are evenly distributed at intervals. The inner wall of the receiving cavity is provided with a blocking member. An abutment groove is formed between two adjacent protrusions. Each abutment groove communicates with the receiving cavity. A portion of the blocking member is located in the corresponding abutment groove and abuts against the corresponding protrusion. The number of protrusions is m, and the number of abutment grooves is m-1, where m is an integer greater than or equal to 3. The cross-section of the abutment groove is rectangular.

2. The brushless motor valve according to claim 1, characterized in that, The push screw assembly includes a screw and a top block connected to each other. The top block is slidably connected to the sealed chamber. The connecting hole and the receiving cavity are both formed in the top block. The sliding stop is connected to the top block. The screw is connected to the rotor. The screw is movably connected to the damper and the bearing respectively. The connecting cavity is formed in the screw. The screw is connected to the detection magnet.

3. The brushless motor valve according to claim 2, characterized in that, The top block also has a mounting cavity on the side opposite to the sliding stop, the mounting cavity is connected to the receiving cavity, and the inner wall of the mounting cavity is provided with internal threads.

4. The brushless motor valve according to claim 3, characterized in that, One end of the lead screw is provided with an external thread, and the internal thread is threadedly connected to the external thread so that the top block is threadedly connected to the lead screw.

5. The brushless motor valve according to claim 4, characterized in that, The lead screw includes a rod body and a boss connected together. The external thread is provided at one end of the rod body away from the boss. The rod body is threadedly connected to the top block and the rotor. The rod body is movably connected to the damper and the bearing respectively. The connecting cavity is formed in the boss. The boss is connected to the detection magnet.

6. The brushless motor valve according to claim 2, characterized in that, The inner wall of the storage cavity is provided with a mounting body, the protective spring is sleeved on the mounting body, and the mounting body is movably connected to the sliding stop.

7. The brushless motor valve according to claim 6, characterized in that, The sliding stop has a connecting groove, and a portion of the mounting body is located within the connecting groove and is movably connected to the sliding stop.

8. The brushless motor valve according to claim 1, characterized in that, The number of dampers and bearings are both two, with the two dampers arranged opposite each other and the two bearings arranged opposite each other, and each damper located between the rotor and one of the bearings.

9. The brushless motor valve according to claim 1, characterized in that, The circuit board is provided with a power supply interface, which is used to electrically connect to the external power source.

10. The brushless motor valve according to claim 1, characterized in that, The sealed chamber, the inlet pipe, and the outlet pipe are integrally formed, and the angle between the extension direction of the inlet pipe and the extension direction of the outlet pipe is 90°.

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