Stator coil with position feedback, electronic expansion valve and vehicle

Abstract

The invention discloses a stator coil with position feedback, an electronic expansion valve and a vehicle, the stator coil comprises a coil shell and a coil framework arranged in the coil shell, the coil framework is provided with a pin located at the outer side of the coil shell, the end face of the coil shell is provided with a first mounting seat, and the first mounting seat is provided with a second mounting seat. The coil framework is provided with a first mounting seat, the coil framework is provided with a second mounting seat, the first mounting seat is provided with a Hall sensor, the second mounting seat is provided with an adapter pin, and the Hall sensor is electrically connected with the adapter pin through an FPC. The Hall sensor is integrated in the coil of the expansion valve, interface output is unified, and the reliability and efficiency of the electronic expansion valve are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic expansion valves, and specifically discloses a stator coil with position feedback, an electronic expansion valve and a vehicle. Background Art

[0002] In recent years, the thermal management system of new energy vehicles has developed rapidly, and electronic expansion valves have been widely used in the air conditioning and battery-side thermal management systems of new energy vehicles. The high sensitivity, fast response and precise adjustment of electronic expansion valves make them a key device in thermal management systems.

[0003] However, there are some problems with current electronic expansion valves. Due to the structural characteristics of stepper motors, the current mainstream electronic expansion valves mainly use open-loop control based on pulse control. Although some expansion valves with integrated controllers use a closed-loop control structure with Hall switch feedback, this type of expansion valve is not standard for all vehicles.

[0004] At the same time, there are two main problems with the automotive electronic expansion valve without a controller in the prior art: one is that the loss of step and stalling cannot be effectively detected, and the other is that it causes operational failures of the thermal management system level air conditioning system.

[0005] In vehicles, these problems can lead to serious problems such as poor control of cooling and loss of control of battery thermal management. These problems are the result of the current inadequacies of electronic expansion valves and cannot be completely eliminated by optimizing existing structures. Therefore, a vehicle electronic expansion valve with position feedback is needed to solve the above technical problems. Summary of the invention

[0006] In order to solve the shortcomings and deficiencies in the above-mentioned prior art, the present invention provides a stator coil, an electronic expansion valve and a vehicle with position feedback, which can effectively solve the problems involved in the background technology by integrating the Hall sensor in the expansion valve coil and unifying the interface output, while realizing closed-loop control and improving the reliability and efficiency of the electronic expansion valve.

[0007] The present invention discloses a stator coil with position feedback, comprising a coil shell and a coil frame arranged in the coil shell, the coil frame is provided with a pin located outside the coil shell, a first mounting seat is provided on the end surface of the coil shell, a second mounting seat is provided on the coil frame, a Hall sensor is provided on the first mounting seat, a transfer pin is provided on the second mounting seat, and the Hall sensor and the transfer pin are electrically connected via an FPC.

[0008] In a preferred embodiment of the present invention, a guide groove for plugging the Hall sensor is provided on the first mounting seat.

[0009] In a preferred embodiment of the present invention, a limiting groove for limiting the FPC along the width direction is provided on the first mounting seat.

[0010] In a preferred embodiment of the present invention, a positioning hole is provided on the end surface of the coil housing, and a positioning protrusion for matching with the positioning hole is provided on the end surface of the first mounting seat.

[0011] In a preferred embodiment of the present invention, the adapter pin located on the second mounting seat is located between the pins, and the adapter pin located on the second mounting seat is located outside the coil housing.

[0012] In a preferred embodiment of the present invention, the adapter pins correspond one-to-one to the pins of the Hall sensor.

[0013] In a preferred embodiment of the present invention, an encapsulation layer is included, and the encapsulation layer covers the coil housing, the Hall sensor, the transfer pins and the FPC.

[0014] In a preferred embodiment of the present invention, the cross-sectional shape of the guide groove is T-shaped or dovetail-shaped.

[0015] The invention also discloses an electronic expansion valve, comprising a stator coil with position feedback.

[0016] The invention also discloses a vehicle, which comprises an electronic expansion valve with position feedback.

[0017] The beneficial effects of the present invention are as follows: the present invention integrates the Hall sensor into the stator coil, which not only realizes closed-loop control and improves the reliability and efficiency of the electronic expansion valve, but also simplifies the installation and operation process and reduces the risk of refrigerant leakage.

[0018] In addition, the present invention further optimizes the structural design and improves the installation accuracy by connecting the Hall sensor and the pin assembly via FPC; at the same time, the Hall signal output of the present invention is uniformly integrated in the coil interface, realizing the unification of signal output and further simplifying installation and operation.

[0019] It is worth mentioning that the present invention does not use any circuit board, but adopts a Hall bracket to fix the accurate position of the Hall sensor, ensuring a consistent position design, thereby ensuring the simplicity and reliability of the structure.

[0020] In summary, the present invention greatly improves the reliability and efficiency of the electronic expansion valve without using a circuit board, simplifies installation and operation, and also improves production efficiency and reduces production costs. It is a very excellent technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0022] Figure 1 : Schematic diagram of the stator coil with position feedback of the present invention;

[0023] Figure 2 : Schematic diagram of the stator coil with position feedback of the present invention;

[0024] Figure 3 : An exploded view of the stator coil with position feedback of the present invention;

[0025] Figure 4 : Schematic diagram of the installation of the Hall sensor of the stator coil with position feedback of the present invention;

[0026] Figure 5 : Schematic diagram of the coil housing of the stator coil with position feedback of the present invention;

[0027] Figure 6 : Schematic diagram of the first mounting base of the stator coil with position feedback of the present invention;

[0028] Figure 7 : Schematic diagram of the encapsulation layer of the stator coil with position feedback of the present invention;

[0029] Figure 8 : Schematic diagram of the electronic expansion valve of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1-8 As shown, a stator coil with position feedback has an ingenious structural design, which improves reliability and efficiency while simplifying the installation and operation process.

[0033] The stator coil of the present invention comprises a coil housing 1 and a coil frame 2 disposed in the coil housing 1. The coil frame 2 is provided with a plug pin 3 located outside the coil housing 1. This structural design helps to simplify installation and operation and reduce the risk of refrigerant leakage.

[0034] The key innovation of the stator coil of the present invention is that a first mounting seat 4 is provided on the end surface of the coil housing 1, and a second mounting seat 5 is provided on the coil skeleton 2. A Hall sensor 6 is provided on the first mounting seat 4, and a transfer pin 7 is provided on the second mounting seat 5, and the two are electrically connected through an FPC 8. The Hall sensor is integrated in the expansion valve coil, which can not only realize closed-loop control and improve the reliability and efficiency of the electronic expansion valve, but also simplify the installation and operation process.

[0035] The Hall sensor of the present invention is connected to the pin assembly by FPC. By providing the guide groove 4.1 on the first mounting seat 4, the installation accuracy of the Hall sensor 6 can be improved. At the same time, providing the limit groove 4.2 on the first mounting seat 4 can improve the installation accuracy of the FPC 8. These designs help to improve the overall reliability.

[0036] The Hall signal output of the present invention is uniformly integrated in the coil interface. By locating the adapter pin 7 on the second mounting base 5 between the pins 3 and outside the coil housing 1, the Hall signal output is uniformly integrated, further simplifying installation and operation.

[0037] The Hall bracket of the present invention fixes the Hall sensor in an accurate position to ensure consistent position. In the design of the stator coil, a positioning hole 1.1 is provided on the end surface of the coil housing 1, and a positioning protrusion 4.3 for matching the positioning hole 1.1 is provided on the end surface of the first mounting seat 4. This design helps to improve positioning accuracy and ensure the reliability of the structure.

[0038] The stator coil of the present invention also uses an encapsulation layer 9 to cover the coil housing 1, the Hall sensor 6, the adapter pin 7 and the FPC 8, further improving the overall reliability and efficiency. The cross-sectional shape of the guide groove 4.1 is T-shaped or dovetail-shaped, which also helps to improve the installation accuracy.

[0039] The stator coil with position feedback of the present invention not only improves the reliability and efficiency of the electronic expansion valve, simplifies the installation and operation process, but also improves production efficiency and reduces production costs. It is a valuable technical product.

[0040] Example 2

[0041] The manufacturing method of the present invention is as follows:

[0042] The specific implementation of the present invention comprises the following steps:

[0043] Step 1: Design the Coil Housing 1

[0044] The coil housing 1 is the main component of the stator coil and is responsible for carrying the coil frame 2 and other components. The design of the coil housing 1 should take into account that a first mounting seat 4 and a positioning hole 1.1 are arranged on its end surface.

[0045] Step 2: Design the Coil Bobbin 2

[0046] The coil frame 2 is a main component in the coil housing 1, and is responsible for carrying the Hall sensor 6 and the adapter pin 7. The design of the coil frame 2 should take into account that the second mounting seat 5 and the pin 3 are arranged on it.

[0047] Step 3: Design the First Mount 4

[0048] The first mounting seat 4 is a seat provided on the end surface of the coil housing 1, responsible for carrying the Hall sensor 6. The design of the first mounting seat 4 should take into account the provision of a guide groove 4.1 for plugging the Hall sensor 6 and a limit groove 4.2 for limiting the FPC 8 along the width direction.

[0049] Step 4: Design the Second Mount 5

[0050] The second mounting seat 5 is a seat arranged above the coil frame 2, responsible for carrying the adapter pin 7. The design of the second mounting seat 5 should take into account that the adapter pin 7 and the positioning protrusion 5.1 for positioning the adapter pin 7 are arranged thereon.

[0051] Step 5: Designing the Hall Sensor 6

[0052] The Hall sensor 6 is a component disposed on the first mounting seat 4 and is responsible for detecting the position of the coil frame 2. The design of the Hall sensor 6 should take into account the one-to-one correspondence between the Hall sensor 6 and the adapter pins 7.

[0053] Step 6: Designing the Adapter Pin 7

[0054] The adapter pin 7 is a component provided on the second mounting base 5, and is responsible for connecting the Hall sensor 6 and the FPC 8. The design of the adapter pin 7 should take into account its one-to-one correspondence with the pins of the Hall sensor 6.

[0055] Step 7: Design FPC8

[0056] FPC8 is a circuit board connecting the Hall sensor 6 and the transfer pin 7. The design of FPC8 should take its connection with the transfer pin 7 into consideration.

[0057] Step 8: Design the Encapsulation Layer

[0058] The encapsulation layer 9 is a material that encapsulates the coil housing 1, the Hall sensor 6, the adapter pin 7 and the FPC 8. The design of the encapsulation layer 9 should take into account that it can protect the components from external damage.

[0059] Step 9: Assemble the components

[0060] Assembling components includes assembling the coil housing 1, the coil frame 2, the first mounting seat 4, the second mounting seat 5, the Hall sensor 6, the adapter pin 7 and the FPC 8 together.

[0061] Step 10: Testing the Components

[0062] Testing components includes detecting the performance and function of components. Testing components should be considered to be able to detect the position of the coil frame 2 and the connection of the transfer pin 7.

[0063] The specific implementation of the present invention includes designing a coil housing 1, a coil skeleton 2, a first mounting seat 4, a second mounting seat 5, a Hall sensor 6, a transfer pin 7 and an FPC 8, assembling components and testing components.

[0064] Furthermore, the present invention also discloses an electronic expansion valve, including a stator coil with position feedback.

[0065] The invention also discloses a vehicle, which comprises an electronic expansion valve with position feedback.

[0066] It should be pointed out that the structures not described in detail in the present invention are all prior arts, such as the expansion valve body and expansion valve seat of the electronic expansion valve; the stator pole plates, skeletons and windings in the stator coil; the expansion valve body is composed of a rotor assembly, a valve core, a connecting sleeve, a valve core seat, a nut assembly, a sleeve and a sealing ring; wherein the valve core is welded to the rotor, the nut assembly is welded to the connecting sleeve, and the rotor assembly and the nut assembly are driven by threads; the expansion valve body is connected to the valve seat by threads, and the coil is connected to the valve seat by screws; and the expansion valve stator coil generates a magnetic field after receiving a pulse signal, and generates a magnetic pole angle with the magnetic rotor inside the expansion valve, thereby driving the expansion valve. The rotor moves, the magnetic rotor is connected to the valve core, there is a thread on the valve core, and it moves in coordination with the thread of the nut seat. The radial rotation of the rotor is converted into axial up and down movement. The up and down movement of the valve core and the valve core seat form the opening and closing of the valve port, and finally form the adjustment of the valve port opening of the expansion valve; and the closed-loop control principle: the rotation of the magnetic rotor causes high and low levels to be generated in the Hall sensor, and the signal is transmitted to the controller. The controller records and determines the movement of the magnetic rotor. If jamming or loss of step occurs during the process, the high and low level signals will change and be compared with the normal signals. After comparison, the jamming and loss of step can be determined.

[0067] The core of the present invention is that the entire electronic expansion valve does not include any circuit board.

[0068] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A stator coil with position feedback, comprising a coil housing (1) and a coil frame (2) arranged in the coil housing (1), wherein the coil frame (2) is provided with a pin (3) located outside the coil housing (1), characterized in that: A first mounting seat (4) is arranged on the end surface of the coil housing (1), a second mounting seat (5) is arranged on the coil frame (2), a Hall sensor (6) is arranged on the first mounting seat (4), a transfer pin (7) is arranged on the second mounting seat (5), and the Hall sensor (6) and the transfer pin (7) are electrically connected via an FPC (8).

2. The stator coil with position feedback according to claim 1, characterized in that: The first mounting seat (4) is provided with a guide groove (4.1) for plugging the Hall sensor (6).

3. The stator coil with position feedback according to claim 1, characterized in that: The first mounting seat (4) is provided with a limiting groove (4.2) for limiting the FPC (8) along the width direction.

4. The stator coil with position feedback according to claim 1, characterized in that: A positioning hole (1.1) is provided on the end surface of the coil housing (1), and a positioning protrusion (4.3) for matching with the positioning hole (1.1) is provided on the end surface of the first mounting seat (4).

5. The stator coil with position feedback according to claim 1, characterized in that: The adapter pin (7) located on the second mounting seat (5) is located between the pins (3), and the adapter pin (7) located on the second mounting seat (5) is located outside the coil housing (1).

6. The stator coil with position feedback according to claim 1, characterized in that: The adapter pins (7) correspond one-to-one to the pins of the Hall sensor (6).

7. The stator coil with position feedback according to claim 1, characterized in that: The invention comprises an encapsulation layer (9), wherein the encapsulation layer (9) covers a coil housing (1), a Hall sensor (6), a transfer pin (7) and an FPC (8).

8. The stator coil with position feedback according to claim 2, characterized in that: The cross-sectional shape of the guide groove (4.1) is T-shaped or dovetail-shaped.

9. An electronic expansion valve, characterized in that: It comprises a stator coil with position feedback as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the electronic expansion valve as claimed in claim 9.

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