Electronic valve and refrigeration appliance

Abstract

The utility model discloses an electronic valve and refrigeration equipment relates to refrigeration control technical field, wherein, electronic valve electronic valve, including lower valve seat subassembly, upper valve seat subassembly, valve needle subassembly and silencer, and lower valve seat subassembly is equipped with the intercommunication and valve mouth, and the valve cavity is formed with upper valve seat subassembly together, valve needle subassembly can be installed in upper valve seat subassembly, is used for opening and closing valve mouth, silencer is located in valve needle subassembly periphery, and its lateral wall is equipped with the sound attenuation hole, and the bottom is sealed butt joint with valve mouth circumference, and the upper end is spaced apart with upper valve seat subassembly, forms the flow passage of refrigerant circulation. Through setting up the silencer with the sound attenuation hole around the valve mouth, the big bubble in the refrigerant is refined into the small bubble, reduces the noise when its breakage, realizes efficient noise reduction. Since the main noise source concentrates in the valve mouth area, this arrangement can realize accurate noise reduction, and improve the overall mute performance. The flow passage formed between the silencer and upper valve seat subassembly helps impurities to be discharged with the refrigerant smoothly, avoids entering the transmission component gap.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration control technology, and in particular to an electronic valve and a refrigeration device. Background Technology

[0002] In existing refrigeration systems, electronic expansion valves are widely used as a key component to regulate refrigerant flow and achieve efficient system operation. However, in actual use, electronic expansion valves often generate significant refrigerant noise during throttling. This noise not only affects the operational stability of the equipment but also reduces the user experience. Especially in environments with high requirements for quiet operation, such as household air conditioners and refrigerators, throttling noise has become a significant factor affecting comfort.

[0003] To address this issue, current industry-wide noise reduction methods primarily focus on optimizing the valve port structure and the internal shape of the valve cavity. Adjusting these geometric parameters reduces pressure fluctuations and turbulence during refrigerant flow, thus achieving a certain level of noise reduction. However, due to significant differences in operating conditions across various refrigeration systems—such as refrigerant type, operating pressure, and flow range—these traditional methods often lack versatility. A single structural design is rarely applicable to multiple systems, leading to increased development and maintenance costs and limiting their widespread adoption in practical applications. Utility Model Content

[0004] The main purpose of this invention is to provide an electronic valve and a refrigeration device, which is to provide an electronic valve that is highly adaptable, simple in structure, low in cost, and can effectively reduce noise.

[0005] To achieve the above objectives, the present invention proposes an electronic valve comprising:

[0006] The lower valve seat assembly and the upper valve seat assembly enclose and form a valve cavity, and the lower valve seat assembly is provided with a communication port and a valve port that communicate with the valve cavity.

[0007] A valve needle assembly, movably mounted on the upper valve seat assembly in directions approaching and away from the valve port, to close and open the valve port; and,

[0008] A silencer is provided on the side of the upper valve seat assembly facing the valve port and is arranged around the periphery of the valve needle assembly. The side wall of the silencer is provided with a silencer hole.

[0009] The lower end of the silencer is arranged around the periphery of the valve port and is sealed and connected to the periphery of the valve port. The upper end is spaced apart from the end face of the upper valve seat assembly to define a flow channel connecting the communication port and the valve port between the silencer and the upper valve seat assembly.

[0010] In one embodiment, the minimum distance between the end faces of the upper valve seat assembly and the silencer that are close to each other is w1, where w1 ≥ 0.4 mm.

[0011] This utility model also proposes an electronic valve comprising:

[0012] The lower valve seat assembly and the upper valve seat assembly enclose and form a valve cavity, and the lower valve seat assembly is provided with a communication port and a valve port that communicate with the valve cavity.

[0013] A valve needle assembly, movably mounted on the upper valve seat assembly in directions approaching and away from the valve port, to close and open the valve port; and,

[0014] A silencer is arranged around the valve needle assembly, and a silencer hole is provided through the side wall of the silencer;

[0015] The lower end of the silencer is arranged around the valve port and connected to the periphery of the valve port. The upper end of the silencer is sealed and connected to the upper valve seat assembly. The side wall of the silencer is provided with at least one through hole that connects the communication port and the valve port.

[0016] In one embodiment, the through hole is located near the end of the silencer cylinder away from the valve port.

[0017] In one embodiment, the diameter of the via is set to be greater than or equal to 0.5 mm.

[0018] In one embodiment, the gap between the inner wall of the silencer and the outer wall of the valve needle assembly is w2, where w2 ≥ 0.4 mm.

[0019] In one embodiment, the silencer includes a multi-layered metal mesh arranged in a ring shape, the multi-layered metal mesh being sequentially arranged from the inside to the outside.

[0020] In one embodiment, each pair of adjacent metal mesh layers is sintered together.

[0021] In one embodiment, the mesh size of the metal mesh is Φ1, 0.1mm ≤ Φ1 ≤ 0.15mm; and / or,

[0022] The diameter of the silencing hole is Φ, 0.2mm≤Φ≤0.6mm.

[0023] In one embodiment, the electronic valve includes a rotor assembly, the rotor assembly including a rotor, the rotor being connected to the valve needle assembly, the rotor driving the valve needle assembly to rotate about its axis;

[0024] The upper valve seat assembly includes:

[0025] A nut, threadedly engaged with the valve needle assembly, allows the valve needle assembly to move towards and away from the valve port as the rotor rotates, thereby closing and opening the valve port; and,

[0026] A guide sleeve is provided on the side of the nut facing the valve port. The guide sleeve is provided with a guide hole for the valve needle assembly to pass through. The guide sleeve is used to guide the valve needle assembly when it moves close to the valve port.

[0027] In one embodiment, the upper end of the silencer is sealed and connected to the guide sleeve.

[0028] In one embodiment, the guide sleeve includes an annular main body and an annular protrusion protruding from the end face of the main body. The annular main body has an annular stepped surface located around the annular protrusion and facing the valve port. The silencer is sleeved around the annular protrusion, and the upper end of the silencer is sealed and connected to the annular stepped surface.

[0029] In one embodiment, the silencer is welded to the guide sleeve; or,

[0030] The silencer and the guide sleeve are integrally formed.

[0031] In one embodiment, the lower valve seat assembly includes:

[0032] A lower valve seat, connected to the upper valve seat assembly, the lower valve seat having the communication port and the mounting port; and...

[0033] A mounting base is installed at the mounting port, and the mounting base has the valve port;

[0034] The muffler is mounted on the mounting base, wherein the muffler and the mounting base are integrally formed; or, the muffler is welded to the mounting base.

[0035] In one embodiment, the inner wall of the lower valve seat assembly is recessed with an annular groove, and the annular groove is arranged around the periphery of the valve port;

[0036] The bottom of the silencer is held in place by the annular groove.

[0037] This utility model also proposes a refrigeration device, which includes the aforementioned electronic valve.

[0038] In one embodiment, the refrigeration equipment includes an air conditioner.

[0039] In this invention, a silencer with silencing holes effectively suppresses throttling noise. Specifically, as the refrigerant passes through the silencer, large air bubbles are broken down into smaller bubbles, reducing the sound energy generated when the bubbles burst, thus achieving noise reduction. Since the main source of noise is concentrated in the valve port area, placing the silencer directly around the valve port allows for more precise and efficient local noise reduction, improving overall quietness. Simultaneously, the flow channel formed between the upper end of the silencer and the upper valve seat assembly allows impurities in the refrigerant to be smoothly discharged, preventing them from entering the gaps between the precision transmission components inside the electronic valve. This effectively prevents valve failure caused by impurities clogging or jamming, ensuring the stability and reliability of the electronic valve's operation. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the structure of the first embodiment of the electronic valve provided by this utility model;

[0042] Figure 2 for Figure 1 A schematic diagram of one embodiment of a silencer;

[0043] Figure 3 for Figure 1 A schematic diagram of another embodiment of the silencer;

[0044] Figure 4 A schematic diagram of the structure of the second embodiment of the electronic valve provided by this utility model;

[0045] Figure 5 for Figure 4 A partial enlarged view of an embodiment at point A;

[0046] Figure 6 for Figure 4 A partial enlarged view of another embodiment at point A;

[0047] Figure 7 A schematic diagram of the structure of the third embodiment of the electronic valve provided by this utility model;

[0048] Figure 8 for Figure 7 A schematic diagram of the structure of the silencer and guide sleeve.

[0049] Explanation of icon numbers:

[0050] 100. Electronic valve; 10. Lower valve seat assembly; 11. Lower valve seat; 12. Mounting seat; 1a. Annular groove; 20. Upper valve seat assembly; 21. Nut; 22. Guide sleeve; 221. Annular main body; 222. Annular protrusion; a. Valve cavity; b. Connecting port; c. Valve port; 3. Valve needle assembly; 4. Silencer; 4a. Silencer hole; 4b. Through hole; 41. Metal mesh; 50. Rotor assembly; 51. Rotor.

[0051] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] Currently, the industry's commonly used noise reduction methods mainly focus on optimizing the design of valve port structure and valve cavity internal shape. By adjusting these geometric parameters, pressure fluctuations and turbulence during refrigerant flow are reduced, thereby achieving a certain noise reduction effect. However, due to significant differences in the operating conditions of different refrigeration systems—such as refrigerant type, operating pressure, and flow range—these traditional methods often suffer from a lack of versatility. A single structural design is difficult to apply to multiple systems, leading to increased development and maintenance costs and limiting its widespread adoption in practical applications.

[0056] This invention proposes an electronic valve, aiming to provide an electronic valve that is highly adaptable, simple in structure, low in cost, and capable of effectively reducing noise.

[0057] Please see Figure 1 In the first embodiment of this utility model, the electronic valve 100 includes a lower valve seat assembly 10, an upper valve seat assembly 20, a valve needle assembly 3, and a silencer 4. The lower valve seat assembly 10 and the upper valve seat assembly 20 enclose a valve cavity a. The lower valve seat assembly 10 is provided with a communication port b and a valve port c that communicate with the valve cavity a. The valve needle assembly 3 is movably mounted on the upper valve seat assembly 20 in directions close to and away from the valve port c to close and open the valve port c. The silencer 4 is disposed on the side of the upper valve seat assembly 20 facing the valve port c and is arranged around the periphery of the valve needle assembly 3. The side wall of the silencer 4 is provided with a silencer hole 4a. The lower end of the silencer 4 is arranged around the periphery of the valve port c and is sealed and connected to the periphery of the valve port c. The upper end is spaced apart from the end face of the upper valve seat assembly 20 to define a flow channel connecting the communication port b and the valve port c between the two.

[0058] Understandably, the lower valve seat assembly 10 and the upper valve seat assembly 20 enclose an internal valve cavity a. The lower valve seat assembly 10 has a communication port b and a valve port c communicating with the valve cavity a. Refrigerant enters through the communication port b and flows out through the valve port c. The valve needle assembly 3 is movably installed within the upper valve seat assembly 20 in a direction close to or away from the valve port c, used to control the opening and closing of the valve port c. A silencer 4 is provided around the valve needle assembly 3. This silencer 4 is located on the side of the upper valve seat assembly 20 facing the valve port c and is arranged around the valve needle assembly 3. Multiple silencer holes 4a are formed on the side wall of the silencer 4. Its lower end is arranged around the valve port c and sealed to the periphery of the valve port c, while its upper end maintains a certain distance from the end face of the upper valve seat assembly 20, thus forming a flow channel for refrigerant circulation.

[0059] When the refrigerant enters from the connecting port b and passes through the silencer 4, any large air bubbles present will be broken down into smaller bubbles by the silencer holes 4a. The noise generated when these smaller bubbles burst during flow is reduced, thus effectively lowering the throttling noise. Since the noise is mainly concentrated near the valve port c, placing the silencer 4 directly around the valve port c allows for targeted noise reduction and enhances the noise reduction effect.

[0060] Furthermore, when the refrigerant enters from the connecting port b, part of it flows through the flow channel between the upper end of the silencer 4 and the upper valve seat assembly 20, and then enters the valve port c area. During this process, any tiny impurities that may be carried in the refrigerant will be smoothly discharged along the flow channel direction, and will not enter the gaps between the internal transmission components (such as threaded mating structures) of the electronic valve 100, thereby avoiding problems such as poor movement or failure caused by impurities clogging or jamming.

[0061] To drive the valve needle assembly 3 to move up and down, various transmission structures can be used. For example, the valve needle assembly 3 can be threaded onto the nut 21. When the rotor 51 drives the nut 21 to rotate, the guide structure restricts the valve needle assembly 3 from rotating, allowing it to move only axially, thus achieving the lifting and lowering control of the valve needle assembly 3. This structure has the advantages of compact structure and high control precision. Alternatively, a gear and rack mechanism or direct drive by a linear motor can be used to achieve linear movement of the valve needle assembly 3, all of which can effectively improve the system's response speed and stability.

[0062] The electronic valve 100 provided by this utility model effectively suppresses throttling noise by setting a silencer 4 with a silencer hole 4a. Specifically, when the refrigerant passes through the silencer 4, the large bubbles are subdivided into multiple small bubbles, thereby reducing the sound energy generated when the bubbles burst, achieving the purpose of noise reduction. Since the main source of noise is concentrated in the valve port c area, placing the silencer 4 directly around the valve port c can achieve more precise and efficient local noise reduction, improving the overall quietness performance. At the same time, the flow channel formed between the upper end of the silencer 4 and the upper valve seat assembly 20 allows impurities in the refrigerant to be smoothly discharged, preventing them from entering the gaps between the precision transmission components inside the electronic valve 100, thereby effectively preventing valve failure caused by impurities clogging or jamming, and ensuring the stability and reliability of the electronic valve 100 operation.

[0063] For details, please continue reading Figure 1 In this embodiment, the minimum distance between the end faces of the upper valve seat assembly 20 and the silencer 4 that are close to each other is w1, where w1 ≥ 0.4 mm.

[0064] It should be noted that during actual assembly, this gap w1 is achieved through precision machining and assembly control. When the refrigerant carrying impurities flows through this gap, since w1 is not less than 0.4mm, it effectively ensures that the impurities pass through smoothly without clogging or accumulating, thus avoiding affecting the operation of the valve needle assembly 3 or the normal operation of the transmission components. At the same time, this gap is not too large to ensure that the silencer 4 still has sufficient height to cover the main bubble refining area, enabling it to fully refine large bubbles in the refrigerant and maintain good noise reduction performance.

[0065] In other words, if the spacing is too small, although it can improve the height utilization rate of the silencer 4, it may make it difficult for impurities to be discharged, affecting the long-term operational stability of the valve; while if the spacing is too large, it will weaken the silencer 4's ability to refine bubbles and reduce noise reduction efficiency. Therefore, setting w1≥0.4mm is a reasonable parameter range obtained after comprehensively considering flow resistance, noise reduction effect and anti-clogging ability.

[0066] In the second embodiment of this utility model, please refer to Figure 4 The electronic valve 100 includes a lower valve seat assembly 10, an upper valve seat assembly 20, a valve needle assembly 3, and a silencer 4. The lower valve seat assembly 10 and the upper valve seat assembly 20 enclose a valve cavity a. The lower valve seat assembly 10 is provided with a communication port b and a valve port c that communicate with the valve cavity a. The valve needle assembly 3 is movably mounted on the upper valve seat assembly 20 in directions close to and away from the valve port c to close and open the valve port c. The silencer 4 is located on the side of the upper valve seat assembly 20 facing the valve port c and is arranged around the periphery of the valve needle assembly 3. The side wall of the silencer 4 is provided with a silencer hole 4a. The lower end of the silencer 4 is arranged around the periphery of the valve port c and is connected to the periphery of the valve port c. The upper end of the silencer 4 is sealed and connected to the upper valve seat assembly 20. The side wall of the silencer 4 is provided with at least one through hole 4b that communicates the communication port b and the valve port c.

[0067] Understandably, a ring-shaped silencer 4 is provided around the valve needle assembly 3. The silencer 4 has multiple silencer holes 4a on its sidewall to refine large air bubbles in the refrigerant and reduce throttling noise. Unlike the previous embodiment, in this embodiment, the lower end of the silencer 4 surrounds the valve port c and connects to its periphery; simultaneously, the upper end of the silencer 4 is also sealed to the upper valve seat assembly 20, thus forming closed flow channels in both the upper and lower directions. Furthermore, at least one through hole 4b is provided on the sidewall of the silencer 4, which connects the flow channel between the connecting port b and the valve port c, allowing the refrigerant to flow smoothly through the entire valve.

[0068] This sealed connection structure ensures that the refrigerant must pass through the internal space of the silencer 4 before flowing from the connecting port b to the valve port c. This prevents air bubbles from passing through the gap between the silencer 4 and the upper valve seat assembly 20 without being refined, thus achieving a more comprehensive and efficient noise reduction effect. Simultaneously, the design of the through-hole 4b not only provides a flow path for the refrigerant but also offers a smooth discharge channel for any impurities that may be carried in the refrigerant, preventing impurity accumulation from affecting the operation of the valve needle assembly 3 or the normal operation of the transmission components.

[0069] The electronic valve 100 provided by this utility model further optimizes the fit between the silencer 4 and the valve body in its structural design. By sealing and connecting the upper and lower ends of the silencer 4 with the periphery of the valve port c and the upper valve seat assembly 20 respectively, it is ensured that the refrigerant must pass through the interior of the silencer 4 during its flow, thereby effectively improving the ability to refine large air bubbles in the refrigerant and preventing untreated air bubbles from escaping from the gaps, which would lead to a decrease in noise reduction effect.

[0070] Meanwhile, the through hole 4b on the side wall of the silencer 4 not only provides the necessary flow path for the refrigerant, but also provides a clear discharge channel for any impurities that may be present. Impurities can first enter the connecting port b with the refrigerant, and then flow smoothly into the valve port c through the through hole 4b and be discharged, without remaining in the valve body or entering between the transmission components, thus avoiding abnormal operation caused by blockage or jamming.

[0071] Further, please refer to Figure 5 and Figure 6 In this embodiment, the through hole 4b is located near the end of the silencer 4 away from the valve port c.

[0072] It should be noted that, under normal circumstances, noise is mainly concentrated near valve port c. This is because the pressure changes drastically in this area, and large air bubbles are prone to bursting, causing vibration and noise. If the through hole 4b is located near valve port c, large air bubbles in the refrigerant may directly enter the valve port c area through the through hole 4b, without being sufficiently refined by the silencer hole 4a structure inside the silencer cylinder 4. As a result, they will still burst near valve port c, leading to a significant reduction in noise reduction effect.

[0073] By positioning the through-hole 4b at the end furthest from the valve port c, the refrigerant is guided to enter through the connecting port b and preferentially flow through the internal space of the silencer 4. This ensures that any large air bubbles present are sufficiently refined before entering the valve port c area. Because the through-hole 4b is positioned at the end furthest from the valve port c, the refrigerant must first enter the interior of the silencer 4 and pass through the effective area of ​​the silencer hole 4a in its flow path. This effectively improves the refinement of air bubbles and prevents untreated large air bubbles from flowing directly into the valve port c area through the through-hole 4b near the valve port c and bursting, thus generating noise.

[0074] Further, please refer to Figure 5In this embodiment, the diameter of the via 4b is set to be greater than or equal to 0.5 mm.

[0075] Setting the diameter of the 4b orifice to be no less than 0.5mm can effectively ensure that tiny impurities that may be carried in the refrigerant can pass through smoothly, without causing blockage or local slag accumulation due to the 4b orifice being too small. In the case that there may be metal shavings, welding slag or other particulate impurities in the refrigerant, it can significantly reduce the probability of problems such as unstable flow, abnormal noise or even valve jamming caused by the blockage of the 4b orifice, thereby avoiding affecting the normal opening and closing action of the valve and the stability of the transmission structure.

[0076] Furthermore, in the first and second embodiments, the gap between the inner wall of the silencer 4 and the outer wall of the valve needle assembly 3 is w2, where w2 ≥ 0.4 mm.

[0077] It should be noted that when the refrigerant flows through the space between the valve needle assembly 3 and the silencer 4, any tiny impurities it may carry can pass through this gap smoothly. If w2 is too small, impurities will accumulate or clog this gap. Setting w2 to be greater than or equal to 0.4mm prevents impurities from accumulating or clogging this area, thus avoiding affecting the normal movement of the valve needle assembly 3 or the working stability of the transmission components. At the same time, this gap will not be too large to ensure that the silencer 4 can still effectively surround the area of ​​the valve needle assembly 3, maintaining its ability to refine large air bubbles in the refrigerant and ensuring that the noise reduction effect is not affected.

[0078] In some implementations, please refer to Figure 2 The silencer 4 includes a multi-layered metal mesh 41 arranged in a ring shape, with the multi-layered metal mesh 41 being arranged sequentially from the inside to the outside.

[0079] The metal mesh 41 structure has good permeability and mechanical stability. When the refrigerant flows through the multi-layer metal mesh 41, the large air bubbles are gradually broken down into smaller bubbles, thereby effectively reducing the noise generated by bubble bursting during the throttling process. At the same time, the metal mesh 41 itself has a certain degree of elasticity and rigidity, which can achieve a stable sealing connection with the valve port c and the upper valve seat assembly 20 during assembly, ensuring that the overall structure is compact and the function is reliable.

[0080] Specifically, in this embodiment, each pair of adjacent metal meshes 41 are sintered together.

[0081] It should be noted that during the manufacturing process, after the multiple layers of metal mesh 41 are sequentially nested and positioned according to design requirements, they are sintered in a high-temperature environment. By controlling the temperature and time, the metal mesh layers 41 undergo micro-fusion at the contact points, thereby achieving a firm connection while maintaining the original pore structure and permeability of the metal mesh 41. This connection method not only improves the overall strength and structural stability of the muffler 4, but also avoids problems such as material aging, loosening, and detachment caused by traditional adhesive bonding or mechanical assembly.

[0082] For other implementations, please refer to Figure 3 One approach is to create multiple silencing holes 4a on the side wall of the hollow silencing cylinder 4.

[0083] Specifically, the mesh size of the metal mesh 41 is Φ1, and its range is limited to 0.1mm≤Φ1≤0.15mm. Within this size range, the metal mesh 41 can effectively refine large air bubbles in the refrigerant while ensuring smooth refrigerant flow, causing them to be broken down into smaller bubbles step by step as they flow through multiple layers of metal mesh 41, thereby effectively reducing throttling noise.

[0084] The diameter of the silencing hole 4a on the side wall of the silencer cylinder 4 is Φ, and its range is set to 0.2mm≤Φ≤0.6mm. This diameter range takes into account the balance between refrigerant flow, noise reduction effect and structural strength, so that the bubbles can be further refined when passing through the silencing hole 4a, while avoiding impurities clogging due to the hole diameter being too small or weakening the noise reduction capability due to the hole diameter being too large.

[0085] Further, please refer to Figures 4 to 6 In some embodiments, the electronic valve 100 includes a rotor assembly 50, which includes a rotor 51 connected to the valve needle assembly 3. The rotor 51 drives the valve needle assembly 3 to rotate about its axis. The upper valve seat assembly 20 includes a nut 21 and a guide sleeve 22. The nut 21 is threadedly engaged with the valve needle assembly 3. When the rotor 51 rotates, the valve needle assembly 3 is movable in the direction of approaching and moving away from the valve port c to close and open the valve port c. The guide sleeve 22 is located on the side of the nut 21 facing the valve port c. The guide sleeve 22 is provided with a guide hole and is used to guide the valve needle assembly 3 when it moves close to the valve port c.

[0086] By using the rotor 51 to drive the valve needle assembly 3 to rotate and in conjunction with the threaded engagement of the nut 21, precise axial movement control of the valve needle assembly 3 is achieved, making the valve opening and closing action more stable and reliable.

[0087] With the guide sleeve 22 installed between the nut 21 and the valve port c, the valve needle assembly 3 can always move along a predetermined trajectory as it moves towards the valve port c, avoiding minor vibrations caused by uneven force or refrigerant flow disturbances. If the valve needle assembly 3 vibrates near the valve port c, it will not only affect the valve control accuracy but also generate additional mechanical vibration and noise. The guide sleeve 22 can constrain the peripheral wall of the valve needle assembly 3, thereby improving the overall operational smoothness and quietness of the electronic valve 100.

[0088] Specifically, please refer to Figure 5 In some embodiments, the upper end of the muffler 4 is sealed and connected to the guide sleeve 22.

[0089] This is achieved by setting a suitable sealing surface at the upper end of the muffler 4 and ensuring it fits tightly against the corresponding part of the guide sleeve 22. During assembly, good sealing performance between the two can be ensured through interference fit, bonding, welding, or the addition of sealing rings. This ensures that the refrigerant must flow through the internal space of the muffler 4 and will not bypass through the gap between the muffler 4 and the guide sleeve 22, thereby improving the noise reduction effect.

[0090] Specifically, please refer to Figure 6 In some other embodiments, the guide sleeve 22 includes an annular main body 221 and an annular protrusion 222 protruding from the end face of the main body. The annular main body 221 has an annular stepped surface located around the annular protrusion 222 and facing the valve port c. The muffler 4 is sleeved around the annular protrusion 222, and the upper end of the muffler 4 is sealed and connected to the annular stepped surface.

[0091] Understandably, the muffler 4 is fitted around the annular protrusion 222 and maintains a coaxial fit with it. This fit ensures that the muffler 4 is radially limited by the annular protrusion 222, preventing eccentricity or shaking caused by refrigerant flow impact or assembly errors. Simultaneously, the upper end of the muffler 4 achieves a sealed connection with the annular stepped surface, forming an axial limiting support to prevent displacement or loosening of the muffler 4 due to excessive refrigerant impact force under high flow conditions.

[0092] In actual operation, especially under high-frequency regulation or high-flow operation, the refrigerant causes significant impact fluctuations on the internal structure. If the silencer 4 is not properly restrained, it is prone to slight movement or vibration. This not only affects its ability to refine bubbles and reduce noise reduction, but may also cause additional mechanical noise. However, the radial restraint achieved by the annular protrusion 222 and the axial restraint achieved by the annular stepped surface can significantly improve the stability of the entire silencer structure, enabling it to maintain good working performance under various complex operating conditions.

[0093] In the third embodiment of the electronic valve 100 provided by this utility model, please refer to... Figure 7 and Figure 8 The muffler 4 is welded to the guide sleeve 22; or the muffler 4 and the guide sleeve 22 are integrally formed.

[0094] When welding is used, local laser welding or resistance welding can be performed at the contact point between the upper end of the muffler 4 and the annular stepped surface of the guide sleeve 22 to firmly bond the two together and ensure sealing and structural stability. When an integrated design is used, the guide sleeve 22 and the muffler 4 can be made into a single component through powder metallurgy, precision casting or injection molding, which not only simplifies the assembly process but also improves the consistency and strength of the structure.

[0095] Regardless of the method used, the connection reliability between the muffler 4 and the guide sleeve 22 can be effectively improved, avoiding loosening or displacement caused by refrigerant impact, vibration or long-term use, thereby ensuring the stable operation of the electronic valve 100.

[0096] Further, please refer to Figure 1 In some embodiments, the lower valve seat assembly 10 includes a lower valve seat 11 and a mounting seat 12. The lower valve seat 11 is connected to the upper valve seat assembly 20, and the lower valve seat 11 has the communication port b and the mounting port. The mounting seat 12 is mounted on the mounting port and has the valve port c. The silencer 4 is mounted on the mounting seat 12, wherein the silencer 4 and the mounting seat 12 are integrally formed; or, the silencer 4 is welded to the mounting seat 12.

[0097] Specifically, the muffler 4 can be integrally formed with the mounting base 12, for example, by precision casting, powder metallurgy or injection molding to form an integral structure; or, the muffler 4 can be firmly connected to the corresponding position of the mounting base 12 by welding, such as high-precision welding processes such as laser welding or resistance welding, to ensure sealing and structural strength.

[0098] Both of the above connection methods can effectively improve the connection stability between the silencer 4 and the mounting base 12, avoiding problems such as loosening or displacement caused by refrigerant impact, vibration or long-term use, thereby ensuring the reliability of the electronic valve 100 and the continuous performance of its noise reduction capabilities.

[0099] Specifically, please refer to Figure 1 and Figure 5 In some embodiments, the inner wall of the lower valve seat assembly 10 is recessed with an annular groove 1a, which is arranged around the periphery of the valve port c; the bottom of the silencer 4 is held in the annular groove 1a.

[0100] The inner wall of the lower valve seat assembly 10 is recessed with an annular groove 1a, which surrounds the periphery of the valve port c; the bottom of the silencer 4 is correspondingly held in the annular groove 1a to achieve axial and circumferential positioning.

[0101] In actual assembly, the bottom outer edge of the muffler 4 can be made of elastic material or have a certain interference fit structure, so that it can be smoothly pressed into the annular groove 1a and maintain a stable connection. This snap-fit ​​structure not only facilitates assembly, but also enables reliable fixing of the muffler 4 without the use of additional fasteners, preventing it from shifting or falling off when impacted by refrigerant flow or equipment vibration.

[0102] In addition, the slot structure can also be used in conjunction with a sealing ring or other sealing structure to enhance the sealing between the muffler 4 and the lower valve seat assembly 10, preventing refrigerant from flowing into the valve port c area without undergoing muffler treatment.

[0103] This utility model also proposes a refrigeration device, which includes an air conditioner, a heat exchanger, and an electronic valve 100. The specific structure of the electronic valve 100 is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0104] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic valve characterized by, include: The lower valve seat assembly and the upper valve seat assembly enclose and form a valve cavity, and the lower valve seat assembly is provided with a communication port and a valve port that communicate with the valve cavity. A valve needle assembly is movably mounted on the upper valve seat assembly in directions approaching and away from the valve port to close and open the valve port; as well as, A silencer is arranged around the valve needle assembly, and a silencer hole is provided through the side wall of the silencer; The lower end of the silencer is arranged around the periphery of the valve port and is sealed and connected to the periphery of the valve port. The upper end is spaced apart from the end face of the upper valve seat assembly to define a flow channel connecting the communication port and the valve port between the silencer and the upper valve seat assembly.

2. The electronic valve of claim 1, wherein The minimum distance between the end faces of the upper valve seat assembly and the silencer that are close to each other is w1, where w1 ≥ 0.4 mm.

3. An electronic valve characterized by include: The lower valve seat assembly and the upper valve seat assembly enclose and form a valve cavity, and the lower valve seat assembly is provided with a communication port and a valve port that communicate with the valve cavity. A valve needle assembly is movably mounted on the upper valve seat assembly in directions approaching and away from the valve port to close and open the valve port; as well as, A silencer is arranged around the valve needle assembly, and a silencer hole is provided through the side wall of the silencer; The lower end of the silencer is arranged around the valve port and connected to the periphery of the valve port. The upper end of the silencer is sealed and connected to the upper valve seat assembly. The side wall of the silencer is provided with at least one through hole that connects the communication port and the valve port.

4. The electronic valve of claim 3, wherein The via is located near the end of the silencer cylinder furthest from the valve port.

5. The electronic valve as described in claim 3, characterized in that, The diameter of the via is set to be greater than or equal to 0.5 mm.

6. The electronic valve as described in claim 1 or 3, characterized in that, The gap between the inner wall of the silencer and the outer wall of the valve needle assembly is w2, where w2 ≥ 0.4 mm.

7. The electronic valve as described in claim 1 or 3, characterized in that, The silencer includes multiple layers of metal mesh arranged in a ring, which are sequentially nested from the inside out.

8. The electronic valve as described in claim 7, characterized in that, The metal mesh is sintered together between each pair of adjacent layers.

9. The electronic valve as described in claim 7, characterized in that, The mesh size of the metal mesh is Φ1, 0.1mm≤Φ1≤0.15mm; and / or, The diameter of the silencing hole is Φ, 0.2mm≤Φ≤0.6mm.

10. The electronic valve as described in claim 1 or 3, characterized in that, The electronic valve includes a rotor assembly, which includes a rotor connected to the valve needle assembly. The rotor drives the valve needle assembly to rotate about its axis. The upper valve seat assembly includes: A nut, threadedly engaged with the valve needle assembly, allows the valve needle assembly to move towards and away from the valve port as the rotor rotates, thereby closing and opening the valve port; and, A guide sleeve is provided on the side of the nut facing the valve port. The guide sleeve is provided with a guide hole for the valve needle assembly to pass through. The guide sleeve is used to guide the valve needle assembly when it moves close to the valve port.

11. The electronic valve as claimed in claim 10, characterized in that, The upper end of the silencer is sealed and connected to the guide sleeve.

12. The electronic valve as claimed in claim 11, characterized in that, The guide sleeve includes an annular main body and an annular protrusion protruding from the end face of the main body. The annular main body has an annular stepped surface located around the annular protrusion and facing the valve port. The muffler is sleeved around the annular protrusion, and the upper end of the muffler is sealed and connected to the annular stepped surface.

13. The electronic valve as described in claim 11, characterized in that, The silencer is welded to the guide sleeve; or... The silencer and the guide sleeve are integrally formed.

14. The electronic valve as described in claim 1 or 3, characterized in that, The lower valve seat assembly includes: A lower valve seat, connected to the upper valve seat assembly, the lower valve seat having the communication port and the mounting port; and... A mounting base is installed at the mounting port, and the mounting base has the valve port; The muffler is mounted on the mounting base, wherein the muffler and the mounting base are integrally formed; or, the muffler is welded to the mounting base.

15. The electronic valve as described in claim 1 or 3, characterized in that, The inner wall of the lower valve seat assembly is recessed with an annular groove, which is arranged around the periphery of the valve port. The bottom of the silencer is held in place by the annular groove.

16. A refrigeration device, characterized in that, Includes the electronic valve as described in any one of claims 1 to 15.

17. The refrigeration equipment as described in claim 16, characterized in that, The refrigeration equipment includes an air conditioner.

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