Electronic expansion valve with self-checking function

Abstract

The utility model provides an electronic expansion valve with a self-checking function, which comprises a valve body, a driving component arranged in the valve body, a valve rod component arranged in the valve body, a fixing component arranged in the rod body, an induction component arranged at the top of the valve body, a nut cap and an inductor, and a self-checking component arranged in the nut cap. The pushing assembly is arranged in the cover cap. According to the electronic expansion valve with the self-checking function, the rod body and the threaded block can be connected and fixed through the fixing assembly, the rod body can move up and down to adjust flow, movement of the rod body can be sensed through the sensor, and when the threaded block cannot drive the rod body to move, the rod body can be driven by the sensor to move. The miniature electric telescopic rod can push the push block to extrude the top of the connecting rod, so that the rod body loses fixing force and is pushed downwards, liquid can circulate through the auxiliary opening, the effect of temporarily adjusting the flow is achieved, and the safety performance of the expansion valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic expansion valve design technical field especially relates to a kind of electronic expansion valve with self-checking function. BACKGROUND

[0002] Electronic expansion valve uses the electric signal generated by the regulated parameter, controls voltage or current applied to expansion valve, to regulate the purpose of supply liquid volume, stepless variable capacity refrigeration system refrigeration supply liquid volume regulation range is wide, requires regulating response fast, traditional throttling device (such as thermal expansion valve) is difficult to well undertake, and electronic expansion valve can well meet the requirement.

[0003] Direct-acting electronic expansion valve is through the pulse voltage of control circuit and acts on each phase coil of motor stator according to certain logic relationship, permanent magnet made motor rotor is acted on by magnetic torque and produces rotary motion, is lifted or descended by the transmission of screw thread, and the flow of valve is regulated, but when it fails, it cannot be self-checked, and no secondary protection is set, to affect the flow of liquid, and cause safety accident seriously, and the safety performance is low.

[0004] Therefore, it is necessary to provide an electronic expansion valve with self-checking function to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides an electronic expansion valve with self-checking function, solve the problem that current electronic expansion valve cannot be self-checked and the low safety performance.

[0006] To solve the above technical problems, the utility model provides an electronic expansion valve with self-checking function, which comprises: a valve body, a drive assembly is arranged in the valve body, the drive assembly comprises a coil, a rotor and a threaded block;

[0007] A valve stem assembly is arranged in the valve body, and the valve stem assembly comprises a stem body and an auxiliary port;

[0008] A fixing assembly is arranged in the stem body, and the fixing assembly comprises a connecting rod, a fixing spring, a fixing block and a fixing hole;

[0009] An induction assembly is arranged on the top of the valve body, and the induction assembly comprises a cap and an inductor;

[0010] A pushing assembly is arranged in the cap, and the pushing assembly comprises a micro electric telescopic rod, a pushing block and a limiting rod.

[0011] Preferably, the coil is fixedly installed inside the top of the valve body, the rotor is movably installed inside the top of the valve body, and the threaded block is threadedly connected to the inner surface of the rotor.

[0012] Preferably, the rod body is movably installed on the inner surface of the threaded block, and the auxiliary port is formed in the inner portion of the rod body close to the bottom.

[0013] Preferably, the connecting rod is movably embedded in the inner portion of the rod body, the fixed spring is fixedly connected to the inner surface of the bottom of the connecting rod, the fixed block is fixedly connected to one end of the bottom of the connecting rod, the fixed hole is formed in the inner portion of the threaded block, and the fixed block is movably embedded in the inner portion of the fixed hole.

[0014] Preferably, the cap is fixedly connected to the top of the valve body, the inductor is fixedly installed on the inner surface of the cap, and the top of the rod body is movably embedded in the inner portion of the cap.

[0015] Preferably, the micro electric telescopic rod is fixedly connected to the top of the rod body, the micro electric telescopic rod is fixedly connected with a pushing block at the bottom, the limiting rod is fixedly installed in the inner portion of the cap, the pushing block is movably connected to the outer surface of the limiting rod, and the pushing block is slidingly connected to the surface of the top of the rod body.

[0016] Compared with the related art, the electronic expansion valve with the self-checking function has the following beneficial effects:

[0017] The electronic expansion valve with the self-checking function can realize the up-and-down movement of the rod body to adjust the flow rate, and the inductor can sense the movement of the rod body. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The preferred embodiment of the electronic expansion valve with the self-checking function is shown in the structure schematic view.

[0019] Figure 2 The preferred embodiment of the electronic expansion valve with the self-checking function is shown in the structure schematic view. Figure 1 The preferred embodiment of the electronic expansion valve with the self-checking function is shown in the structure schematic view.

[0020] Figure 3 The preferred embodiment of the electronic expansion valve with the self-checking function is shown in the structure schematic view. Figure 1 The preferred embodiment of the electronic expansion valve with the self-checking function is shown in the structure schematic view.

[0021] 1, valve body,

[0022] 2, drive assembly, 21, coil, 22, rotor, 23, threaded block,

[0023] 3, valve stem assembly, 31, stem body, 32, auxiliary port,

[0024] 4, fixed assembly, 41, connecting rod, 42, fixed spring, 43, fixed block, 44, fixed hole,

[0025] 5, induction assembly, 51, cap, 52, inductor,

[0026] 6, push assembly, 61, micro electric telescopic rod, 62, push block, 63, limit rod. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and embodiments.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3 Among them, Figure 1 It is the structure diagram of the preferred embodiment of the electronic expansion valve with self-checking function provided by the utility model; Figure 2 It is the enlarged schematic view of A part shown in Figure 1 ; Figure 3 It is the enlarged schematic view of B part shown in Figure 1 . An electronic expansion valve with self-checking function comprises a valve body 1, the inside of the valve body 1 is provided with drive assembly 2, the drive assembly 2 includes coil 21, rotor 22 and threaded block 23;

[0029] Valve stem assembly 3, the valve stem assembly 3 is arranged in the inside of the valve body 1, and the valve stem assembly 3 includes stem body 31 and auxiliary port 32;

[0030] Fixed assembly 4, the fixed assembly 4 is arranged in the inside of the stem body 31, and the fixed assembly 4 includes connecting rod 41, fixed spring 42, fixed block 43 and fixed hole 44;

[0031] Induction assembly 5, the induction assembly 5 is arranged at the top of the valve body 1, and the induction assembly 5 includes cap 51 and inductor 52;

[0032] Push assembly 6, the push assembly 6 is arranged in the inside of the cap 51, and the push assembly 6 includes micro electric telescopic rod 61, push block 62 and limit rod 63.

[0033] Valve body 1 is a motor bottom through two connecting pipe connection, two connecting pipe into L-shaped, drive assembly 2 is arranged in the motor, drive assembly 2 left and right is drive valve stem assembly 3 up and down movement, the role of valve stem assembly 3 is up and down movement to adjust the flow, the role of fixed assembly 4 is to fix the rod body 31, the role of induction assembly 5 is connected while can induction rod body 31 position, the role of push assembly 6 is to make the rod body 31 fixed and drive rod body 31 up and down movement, temporary adjust the flow effect.

[0034] The coil 21 is fixedly installed in the inside of the top of the valve body 1, the rotor 22 is movably installed in the inside of the top of the valve body 1, the threaded block 23 is screw connected to the inner surface of the rotor 22.

[0035] Coil 21 is fixedly installed in the inside of the motor in valve body 1, rotor 22 is rotatably installed in the inside of the motor, and the inner surface is provided with screw thread, threaded block 23 is embedded in the inside of rotor 22 and is screw connected with the inner surface of rotor 22, the pulse voltage of control circuit is applied to each phase coil 21 according to certain logic relationship, rotor 22 produces rotary motion under the action of magnetic torque, threaded block 23 drives rod body 31 to rise or fall through the transmission of screw thread, so as to adjust the flow of valve.

[0036] The rod body 31 is movably installed in the inner surface of the threaded block 23, the auxiliary port 32 is formed in the inside of the bottom of the rod body 31.

[0037] The bottom of the rod body 31 is movably embedded in the inside of the connecting portion of the two pipes in the valve body 1, and is embedded in the inside of the threaded block 23 through the top of the two pipes, the surface of the rod body 31 embedded in the inside of the threaded block 23 is fixedly connected with a block, and a groove is formed in the inside of the threaded block 23, the block is embedded in the inside of the groove, when the block loses the fixing force, it can slide up and down in the groove along with the rod body 31.

[0038] The connecting rod 41 is movably embedded in the inside of the rod body 31, the fixed spring 42 is fixedly connected to the inner surface of the bottom of the connecting rod 41, the fixed block 43 is fixedly connected to one end of the bottom of the connecting rod 41, the fixed hole 44 is formed in the inside of the threaded block 23, and the fixed block 43 is movably embedded in the inside of the fixed hole 44.

[0039] The two connecting rods 41 are L-shaped at the bottom, and the top of each connecting rod 41 is fixedly connected with a wedge-shaped block and movably embedded in the inner part of the connecting block on the surface of the rod body 31; a groove is formed at the upper and lower ends of the two connecting rods 41; the two ends of the two fixed springs 42 are fixedly connected to the inner surfaces of the upper and lower grooves of the two connecting rods 41; and the two fixed blocks 43 are fixedly connected to one end of the bottom of the two connecting rods 41.

[0040] The cap 51 is fixedly connected to the top of the valve body 1, the inductor 52 is fixedly installed on the inner surface of the cap 51, and the top of the rod body 31 is movably embedded in the cap 51.

[0041] The top of the rod body 31 is T-shaped and movably embedded in the cap 51; the inductor 52 is arranged in two groups on the top and bottom of the cap 51, and each group has two inductors; the inductors are fixedly installed on the inner surfaces of the left and right ends of the cap 51; when the top of the rod body 31 is on the same horizontal line as the top inductor 52, the rod body 31 is embedded in the valve seat, and the liquid no longer flows; and when the top of the rod body 31 is on the same horizontal line as the top inductor 52, the rod body 31 is on the top of the valve seat, and the water flow is the largest.

[0042] The micro electric telescopic rod 61 is fixedly connected to the top of the rod body 31, the bottom of the micro electric telescopic rod 61 is fixedly connected with a pushing block 62, the limiting rod 63 is fixedly installed in the cap 51, the pushing block 62 is movably connected to the outer surface of the limiting rod 63, and the pushing block 62 is slidably connected to the surface of the top of the rod body 31.

[0043] The micro electric telescopic rod 61, the pushing block 62 and the limiting rod 63 are all two in number; the two micro electric telescopic rods 61 are fixedly connected to the bottoms of the left and right ends of the rod body 31; the bottom of the one end of each of the two pushing blocks 62 is beveled and abuts against the top of the wedge-shaped block at the top of the connecting rod 41; the micro electric telescopic rod 61 pushes the pushing block 62, the bottom of each of the two pushing blocks 62 applies an inward pushing force to the wedge-shaped block, the two connecting rods 41 are moved inward, the fixed block 43 is moved out of the inner part of the fixed hole 44, the rod body 31 loses the fixing force, the pushing block 62 continues to move downward and applies a downward pushing force to the connecting rod 41, the rod body 31 is moved downward, and the flow is adjusted.

[0044] The working principle of the electronic expansion valve with the self-checking function is as follows:

[0045] The pulse voltage of the control circuit acts on each phase coil 21 according to a certain logic relationship, the rotor 22 is subjected to a magnetic torque to produce a rotating motion, the threaded block 23 drives the rod body 31 to ascend or descend through the transmission of the screw thread, the flow of the valve is adjusted, when the threaded block 23 fails to drive the rod body 31 to move up and down, the inductor 52 can induct and send a signal, the micro electric telescopic rod 61 is started under the control, the micro electric telescopic rod 61 drives the pushing block 62 to move downwards, the pushing block 62 is connected with the wedge surface at the top of the two connecting rods 41 and gives the two connecting rods 41 an inward pushing force, so that the two connecting rods 41 drive the fixed block 43 to slide out of the inside of the two fixed holes 44 under the pushing force, the two rod bodies 31 lose the fixing force, the micro electric telescopic rod 61 drives the pushing block 62 to continue to push the connecting rod 41 downwards, the connecting rod 41 drives the rod body 31 to move downwards under the pressure, when the bottom of the rod body 31 is at the top of the valve seat, the liquid flows through the bottom of the rod body 31 and the valve seat, when the bottom of the rod body 31 is inside the valve seat, the auxiliary port 32 moves into the inside of the valve seat, the liquid flows through the auxiliary port 32 and the inside of the valve seat, so that the temporary liquid flow is achieved.

[0046] Compared with the related art, the electronic expansion valve with self-checking function has the following beneficial effects:

[0047] The rod body 31 and the threaded block 23 are connected and fixed through the fixing assembly 4, the up and down movement of the rod body 31 is realized to adjust the flow, the inductor 52 can induct the movement of the rod body 31, when the threaded block 23 fails to drive the rod body 31 to move, the micro electric telescopic rod 61 can push the pushing block 62 to extrude the top of the connecting rod 41, the rod body 31 loses the fixing force and is pushed downwards at the same time, the liquid can flow through the auxiliary port 32, so that the temporary flow adjustment is achieved, and the safety performance of the expansion valve is improved.

[0048] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion according to the content of the utility model specification and the drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. An electronic expansion valve with a self-checking function, characterized in that: include: A valve body, wherein a drive assembly is provided inside the valve body, and the drive assembly includes a coil, a rotor and a threaded block; A valve stem assembly, the valve stem assembly is arranged inside the valve body, and the valve stem assembly includes a stem body and an auxiliary port; A fixing assembly is arranged inside the rod body, and includes a connecting rod, a fixing spring, a fixing block and a fixing hole; A sensing component is provided on the top of the valve body, and comprises a cap and a sensor; The pushing component is arranged inside the cap, and the pushing component includes a micro electric telescopic rod, a pushing block and a limiting rod.

2. The electronic expansion valve with self-checking function according to claim 1, characterized in that: The coil is fixedly mounted inside the top of the valve body, the rotor is movably mounted inside the top of the valve body, and the threaded block is threadedly connected to the inner surface of the rotor.

3. The electronic expansion valve with self-checking function according to claim 1, characterized in that: The rod body is movably mounted on the inner surface of the threaded block, and the auxiliary port is opened inside the rod body near the bottom.

4. The electronic expansion valve with self-checking function according to claim 1, characterized in that: The connecting rod is movably embedded in the interior of the rod body, the fixing spring is fixedly connected to the inner surface of the bottom of the connecting rod, the fixing block is fixedly connected to one end of the bottom of the connecting rod, the fixing hole is opened in the interior of the threaded block, and the fixing block is movably embedded in the interior of the fixing hole.

5. The electronic expansion valve with self-checking function according to claim 1, characterized in that: The cap is fixedly connected to the top of the valve body, the sensor is fixedly installed on the inner surface of the cap, and the top of the rod is movably embedded in the interior of the cap.

6. The electronic expansion valve with self-checking function according to claim 1, characterized in that: The micro electric telescopic rod is fixedly connected to the top of the rod body, the bottom of the micro electric telescopic rod is fixedly connected to a pushing block, the limiting rod is fixedly installed inside the cap, the pushing block is movably connected to the outer surface of the limiting rod, and the pushing block is slidably connected to the surface of the top of the rod body.

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