A full vaporization expansion valve

Abstract

The utility model relates to refrigeration equipment technical field especially, it is a kind of full vaporization expansion valve for connecting the input pipe and output pipe of refrigerant pipe, with upper and lower settings valve shell and valve cover, it is characterized by, including the magnetic rotor being arranged in the inside of valve shell, and with the valve seat fastening connection of valve cover, the magnetic rotor drive connection has screw rod, the screw rod drive connection has valve needle subassembly, the valve seat has inner chamber, and is equipped with with inner chamber intercommunication inlet, liquid outlet and guide port, the guide port inner wall with the upper and lower sliding fit of valve needle subassembly, the inlet fastening connection has the input pipe of refrigerant pipe, the output pipe of refrigerant pipe is fastened and is connected to the liquid outlet, the liquid outlet with valve needle subassembly open-close cooperation;The utility model is by setting magnetic rotor, screw rod and valve needle subassembly, realize the opening and closure and flow control of liquid outlet, control precision is high, by the setting of liquid outlet, make the ejection refrigerant vaporization more fully, effectively improve refrigeration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a fully vaporized expansion valve. Background Technology

[0002] The expansion valve is a key component in a refrigeration system. It controls the flow rate of the refrigerant, ensuring that the liquid refrigerant fully vaporizes in the evaporator, thereby improving refrigeration efficiency. While there are many types of expansion valves on the market, in actual use, problems such as insufficient refrigerant vaporization and low flow control accuracy often arise, affecting the overall performance of the refrigeration system.

[0003] For example, some traditional expansion valves have structural design flaws, such as insufficient fit between the valve needle and valve seat, leading to refrigerant leakage and affecting the accuracy of flow control. Additionally, some expansion valves have poorly designed vaporization mechanisms, preventing the refrigerant from fully vaporizing as it flows through the valve, reducing the evaporator's heat exchange efficiency and increasing energy consumption.

[0004] Therefore, developing an expansion valve that can achieve full vaporization of refrigerant and high flow control accuracy is of great practical significance. Utility Model Content

[0005] The purpose of this utility model is to provide a fully vaporized expansion valve to overcome the problems of insufficient refrigerant vaporization and low flow control accuracy in existing expansion valves.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A fully vaporized expansion valve for connecting the input and output pipes of a refrigerant pipe has an upper and lower valve body and a valve cover, including a magnetic rotor disposed inside the valve body and a valve seat fastened to the valve cover. The magnetic rotor is driven by a lead screw, which is driven by a valve needle assembly. The valve seat has an inner cavity and is provided with an inlet, an outlet, and a guide port that communicate with the inner cavity. The inner wall of the guide port slides vertically with the valve needle assembly. The inlet is fastened to the input pipe of the refrigerant pipe, and the outlet is fastened to the output pipe of the refrigerant pipe. The outlet is in an opening and closing cooperation with the valve needle assembly.

[0008] Furthermore, the valve needle assembly includes a guide cylinder that can be slidably disposed within the guide port, the lead screw that can slidably pass through the guide cylinder, a threaded sleeve that is fixedly connected to the top of the inner wall of the guide cylinder and threadedly engaged with the lead screw, and a valve needle that is disposed at the bottom of the inner wall of the guide cylinder and engages with the liquid outlet to open and close.

[0009] Furthermore, two rubber rings are provided between the valve needle and the inner wall of the guide cylinder, and an abutment spring is provided between the valve needle and the guide sleeve, the abutment spring being slidably sleeved on the lead screw.

[0010] Furthermore, the lead screw has a smooth sliding surface on the outer wall of the abutment spring, the bottom of the lead screw has a protrusion, and the top of the valve needle has a groove for accommodating the protrusion.

[0011] Furthermore, the inner wall of the liquid outlet has a mating part, a vaporization part, and a corrugated part connected from top to bottom. The mating part and the corrugated part are both conical and are symmetrically arranged with the vaporization part as the center.

[0012] Furthermore, the inner wall of the mating part has a first conical surface, the bottom of the valve needle has a second conical surface that forms an opening and closing fit with the first conical surface, the inner wall of the vaporization part has a threaded surface, and the inner wall of the wave part has a wave-like surface.

[0013] Compared with the prior art, the fully vaporized expansion valve provided by this utility model has the following beneficial effects:

[0014] This utility model sets up a magnetic rotor, a lead screw, and a valve needle assembly. The rotation of the magnetic rotor drives the lead screw to rotate, which in turn drives the valve needle assembly to move up and down. The valve needle of the valve needle assembly opens and closes the liquid outlet of the valve seat, thereby realizing the opening and closing of the liquid outlet and flow control with high control precision.

[0015] This invention features a mating part, a vaporization part, and a corrugated part on the inner wall of the liquid outlet. The mating part forms an opening and closing fit with the bottom of the valve needle, ensuring sealing performance. The threaded surface of the vaporization part can fully convert the high-pressure liquid refrigerant into gaseous refrigerant. The corrugated surface of the corrugated part can provide flow for the gaseous refrigerant, allowing it to diffuse better and effectively improving refrigeration efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the fully vaporized expansion valve of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the valve needle assembly of a fully vaporized expansion valve according to the present invention.

[0018] Figure 3 for Figure 1 Enlarged view of point A.

[0019] The following are the labeling elements in the diagram: 1. Valve housing; 2. Valve cover; 3. Magnetic rotor; 4. Valve seat; 41. Inner cavity; 42. Liquid inlet; 43. Liquid outlet; 431. Fitting part; 432. Vaporization part; 433. Wave part; 44. Guide port; 5. Lead screw; 51. Sliding surface; 52. Protrusion; 6. Valve needle assembly; 61. Guide cylinder; 62. Screw sleeve; 63. Valve needle; 631. Groove; 64. Rubber ring; 65. Abutment spring; 7. Input pipe; 8. Output pipe; 9. First conical surface; 10. Second conical surface; 11. Coil. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a fully vaporized expansion valve for connecting the input pipe 7 and the output pipe 8 of a refrigerant pipe. The input pipe 7 is the pipe through which refrigerant liquid flows into the expansion valve, and the output pipe 8 is the pipe through which refrigerant liquid flows out of the expansion valve. The expansion valve has a valve housing 1 and a valve cover 2 fixedly connected vertically. It includes a magnetic rotor 3 disposed inside the valve housing 1 and a valve seat 4 tightly connected to the valve cover 2. The magnetic rotor 3 is driven by a lead screw 5, which is driven by a valve needle assembly 6. The valve seat 4 has an inner cavity 41 and is provided with an inlet 42, an outlet 43, and a guide port 44 communicating with the inner cavity 41. The inlet 42 is located on the right side of the inner cavity 41, and the outlet 43 is located on the right side of the inner cavity 41. At the bottom of the inner cavity 41, the guide port 44 is located at the top of the inner cavity 41. The inner wall of the guide port 44 slides up and down with the valve needle assembly 6. The liquid inlet 42 is fastened to the input pipe 7 of the refrigerant pipe, and the liquid outlet 43 is fastened to the output pipe 8 of the refrigerant pipe. The liquid outlet 43 is in cooperation with the valve needle assembly 6 for opening and closing. Among them, the outer wall of the valve body 1 is fitted with a coil 11 outside the magnetic rotor 3. By energizing the coil 11, a magnetic field is generated that interacts with the magnetic rotor 3, causing the magnetic rotor 3 to rotate. The magnetic rotor 3 drives the lead screw 5 to rotate, and the rotation of the lead screw 5 drives the valve needle assembly 6 to move up and down, thereby enabling the valve needle assembly 6 and the liquid outlet 43 of the valve seat 4 to open and close up and down, so as to control the flow rate entering the liquid outlet 43.

[0023] To facilitate the operation of the valve needle 63, the inner wall of the guide port 44 also has a guide groove 441. Specifically, the valve needle assembly 6 includes a guide cylinder 61 that can be slidably disposed in the guide groove 441 of the guide port 44. The lead screw 5 slidably passes through the guide cylinder 61. A threaded sleeve 62 that is threadedly engaged with the lead screw 5 is fixedly connected to the top of the inner wall of the guide cylinder 61. A valve needle 63 that is engaged with the outlet port 43 to open and close is disposed at the bottom of the inner wall of the guide cylinder 61. The sliding engagement between the guide cylinder 61 and the guide port 44 ensures the stability of the movement of the valve needle assembly 6. At the same time, the threaded engagement between the threaded sleeve 62 and the lead screw 5 improves the transmission accuracy of the valve needle assembly 6, thereby ensuring the accuracy of the valve needle 63 in controlling the flow.

[0024] The rotation of the magnetic rotor 3 drives the lead screw 63 to rotate. The rotation of the lead screw 63 drives the screw sleeve 62 to move up and down along the direction of the lead screw 63, thereby driving the guide cylinder 61 to move up and down in the guide groove 441 of the guide port 44. The up and down movement of the guide cylinder 61 drives the valve needle 63 to move up and down, thereby realizing the opening and closing of the liquid outlet 43 by the valve needle 63.

[0025] Two rubber rings 64 are provided between the valve needle 63 and the inner wall of the guide cylinder 61. An abutment spring 65 is provided between the valve needle 63 and the guide sleeve. The abutment spring 65 is slidably sleeved on the lead screw 5. The rubber rings 64 play a sealing role to prevent the refrigerant liquid inside the valve seat 4 from flowing into the guide cylinder 61 and affecting the operation of the valve needle 63. The abutment spring 65 plays a role in abutting and resetting the valve needle 63.

[0026] Specifically, the lead screw 5 has a smooth sliding surface 51 on the outer wall of the abutment spring 65, and a protrusion 52 extends from the bottom of the lead screw 5. The top of the valve needle 63 has a groove 631 for accommodating the protrusion 52. The sliding surface 51 reduces the friction between the lead screw 5 and the abutment spring 65, thereby improving the service life of the lead screw 5. The protrusion 52 at the bottom of the lead screw 5 cooperates with the groove 631 at the top of the valve needle 63 to ensure that the force exerted by the lead screw 5 on the valve needle 63 is more stable and reliable.

[0027] It should be further explained that the working stroke of the lead screw 5 will not disengage from the guide cylinder 61. The sliding surface 51 of the lead screw 5 makes sliding contact with the abutment spring 65, and the provided protrusion 52 can be slidably accommodated in the groove 631. At the same time, the protrusion 52 plays an anti-displacement role for the abutment spring 65, ensuring the reliability of the lead screw 5 working in the guide cylinder 61.

[0028] The inner wall of the outlet 43 has a mating part 431, a vaporization part 432 and a wave part 433 connected from top to bottom (i.e. from the inner cavity 41 toward the outlet 43). The inner wall of the mating part 431 has a first conical surface 9. The bottom of the valve needle 63 has a second conical surface 10 that forms an opening and closing fit with the first conical surface 9. Both the first conical surface 9 and the second conical surface 10 are conical surfaces with good airtightness, which ensures the sealing performance.

[0029] The mating part 431 and the wave part 433 are symmetrically arranged above and below the vaporization part 432, and both the mating part 431 and the wave part 433 extend from the inside out in a conical shape. The inner wall of the vaporization part 432 has a threaded surface, which is a vortex-type thread, and can spray the high-pressure liquid refrigerant into a mist, so that the high-pressure liquid refrigerant can be sprayed out completely and fully. The mist makes it easier for the liquid refrigerant to evaporate into gaseous refrigerant, thus completely and fully converting the high-pressure liquid refrigerant into gaseous refrigerant. The inner wall of the wave part 433 has a wave-shaped surface that extends towards the output pipe 8. The wave-shaped surface can provide good flow for the sprayed gaseous refrigerant, making the refrigerant spray more smoothly diffused and improving the refrigeration efficiency.

[0030] Working principle:

[0031] The refrigerant enters the inner cavity 41 of the valve seat 4 from the liquid inlet 42, and flows out of the inner cavity 41 in sequence from the mating part 431, the vaporization part 432 and the wave part 433 of the liquid outlet 43.

[0032] When the expansion valve needs to be opened, the coil 11 is energized, and the coil 11 drives the magnetic rotor 3 to rotate, which in turn drives the lead screw 5 to rotate. Since the screw sleeve 62 is threadedly engaged with the lead screw 5, the rotation of the lead screw 5 will cause the guide cylinder 61 to slide upward in the guide port 44, which in turn drives the valve needle 63 to move upward, so that the valve needle 63 separates from the mating part 431 of the liquid outlet 43, that is, the second conical surface 10 separates from the first conical surface 9. The refrigerant enters the vaporization part 432 and the wave part 433 from the mating part 431. Under the action of the threaded surface of the vaporization part 432 and the wave surface of the wave part 433, it is fully vaporized and flows out smoothly from the output pipe 8.

[0033] When the expansion valve needs to be closed, the coil 11 is energized, and the coil 11 drives the magnetic rotor 3 to rotate in the opposite direction, which in turn drives the lead screw 5 to rotate in the opposite direction. The guide cylinder 61 slides downward in the guide port 44, and the valve needle 63 moves downward under the action of the abutment spring 65, so that the valve needle 63 and the mating part 431 of the liquid outlet 43 are tightly joined together, that is, the second conical surface 10 and the first conical surface 9 are tightly joined together, thereby closing the liquid outlet 43.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fully vaporized expansion valve for connecting the inlet and outlet pipes of a refrigerant pipe, comprising an upper and lower valve body and a valve cover, characterized in that, The valve includes a magnetic rotor disposed inside the valve housing and a valve seat that is fastened to the valve cover. The magnetic rotor is driven by a lead screw, which is driven by a valve needle assembly. The valve seat has an inner cavity and is provided with an inlet, an outlet, and a guide port that communicate with the inner cavity. The inner wall of the guide port slides vertically with the valve needle assembly. The inlet is fastened to the input pipe of the refrigerant pipe, and the outlet is fastened to the output pipe of the refrigerant pipe. The outlet is in an opening and closing cooperation with the valve needle assembly.

2. The fully vaporized expansion valve according to claim 1, characterized in that, The valve needle assembly includes a guide cylinder that can slide up and down inside the guide port, a lead screw that can slide through the guide cylinder, a threaded sleeve that is threadedly connected to the top of the inner wall of the guide cylinder, and a valve needle that cooperates with the liquid outlet to open and close at the bottom of the inner wall of the guide cylinder.

3. The fully vaporized expansion valve according to claim 2, characterized in that, Two rubber rings are provided between the valve needle and the inner wall of the guide cylinder, and an abutment spring is provided between the valve needle and the guide sleeve. The abutment spring is slidably sleeved on the lead screw.

4. The fully vaporized expansion valve according to claim 3, characterized in that, The lead screw has a smooth sliding surface on the outer wall of the abutment spring, the bottom of the lead screw has a protrusion, and the top of the valve needle has a groove for accommodating the protrusion.

5. The fully vaporized expansion valve according to claim 1, characterized in that, The inner wall of the liquid outlet has a mating part, a vaporization part and a corrugated part connected from top to bottom. The mating part and the corrugated part are both conical and are symmetrically arranged with the vaporization part as the center.

6. The fully vaporized expansion valve according to claim 5, characterized in that, The inner wall of the mating part has a first conical surface, the bottom of the valve needle has a second conical surface that forms an opening and closing fit with the first conical surface, the inner wall of the vaporization part has a threaded surface, and the inner wall of the wave part has a wave-like surface.

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