Rotational flow structure for rotational flow ejector and rotational flow ejector

Abstract

The utility model discloses a rotational flow structure for a rotational flow ejector and the rotational flow ejector. The rotational flow structure comprises a lower valve body, a ball valve assembly, a rotational flow base and a jet flow piece. The lower valve body is of a hollow cylindrical structure, and one end of the lower valve body is fixed to one end of the rotational flow base in a sealed mode. The rotational flow seat is integrally designed, and a liquid groove, a flow guide hole, a flow dividing hole and a rotational flow channel are formed in the rotational flow seat; a ball body of the ball valve assembly penetrates through the lower valve body and is in sealing contact with a conical surface at the bottom of the rotational flow base, a flow guide hole is formed in the center of the conical surface, a flow dividing hole extending outwards is formed in the inner wall of the flow guide hole, a rotational flow channel extending outwards from the center is arranged on the surface of the end, away from the lower valve body, of the rotational flow base, and the flow dividing hole and the rotational flow channel are communicated through a flow turning cavity. A rotational flow hole communicated with the rotational flow channel is formed in the surface of one end, far away from the lower valve body, of the rotational flow seat; the jet-flow piece is fixed to the end, away from the lower valve body, of the rotational flow base in a sealed mode. A jet-flow hole is formed in the position, corresponding to the rotational flow hole, of the bottom wall of the jet-flow piece. According to the utility model, high spraying precision and atomization effect are maintained.

Description

Technical Field

[0001] The utility model relates to the field of liquid swirl injection, in particular to a swirl structure for a swirl injector and the swirl injector. Background Art

[0002] In recent years, with the continuous increase in the number of diesel engines used in vehicles, automobile exhaust pollution has become more and more serious, and the country's emission control of diesel locomotives has become more and more stringent. Internal purification alone cannot meet the requirements of the National VI Emission Regulations, and external exhaust gas purification technology must be added. Nitrogen oxides (NO x ) is the primary pollutant emitted by diesel engine exhaust. Selective catalytic reduction (SCR) is an effective method for controlling nitrogen oxides outside diesel engines, significantly reducing their levels in internal combustion engine exhaust. SCR uses a reducing agent (such as liquid nitrogen or urea) in the presence of a catalyst to selectively react with nitrogen oxides in exhaust gas, producing non-toxic and non-polluting molecular nitrogen and water.

[0003] Selective catalytic reduction (SCR) occurs within the SCR catalytic converter. The reductant (such as a urea-water solution) is injected directly into the exhaust pipe by a SCR injection device upstream of the SCR catalytic converter. To optimally introduce the reductant into the exhaust gas and promote the SCR reaction, the SCR injection device must atomize the urea solution as much as possible. The better the atomization, the more efficient the SCR reaction.

[0004] The selective catalytic reduction injection device is installed on the exhaust pipe. In order to better atomize the urea solution, the hole at the mouth of the injection device is usually made smaller. However, due to the complexity and corrosiveness of the exhaust gas components, the hole at the mouth of the injection device is often blocked due to corrosion or urea crystallization, which leads to failure of the injection device.

[0005] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a new technical solution. Utility Model Content

[0006] To address at least one of the technical problems in the prior art, the present invention provides a swirl structure and swirl injector that maintains high spray accuracy and atomization while keeping the sprayed liquid within the desired spatial angle range. Furthermore, the jet orifice has a large diameter, effectively preventing clogging of the nozzle of the spray device. The specific technical solution is as follows:

[0007] On the one hand, the utility model provides a swirl structure for a swirl injector, which includes a lower valve body, a ball valve assembly, a swirl seat and a spray member;

[0008] The lower valve body is a hollow cylindrical structure, one end of which is sealed and fixed to one end of the swirl seat; the ball valve assembly includes an assembly body and a ball fixed to one end of the assembly body;

[0009] The swirl seat is an integrated design with liquid groove, guide hole, diversion hole and swirl channel.

[0010] The liquid tank opens toward the lower valve body, the bottom of the liquid tank is a conical surface, the ball of the ball valve assembly passes through the lower valve body and is in sealing contact with the conical surface of the swirl seat, and the ball valve assembly is configured to move toward the swirl seat until the ball is in sealing contact with the conical surface or move away from the swirl seat until a gap is formed between the ball and the conical surface;

[0011] A guide hole is provided at the center of the conical surface of the swirl seat, a plurality of diverter holes are provided on the inner wall of the guide hole, the diverter holes extend outward to the side surface of the swirl seat, a transfer cavity is provided on the side surface of the swirl seat, a plurality of swirl channels extending outward from the center are provided on the surface of the swirl seat away from the lower valve body, the diverter holes and the swirl channels are connected through the transfer cavity, and a swirl hole connected to the swirl channel is provided on the surface of the end of the swirl seat away from the lower valve body;

[0012] The spray piece is a hollow structure with one end open. The open end of the spray piece is sealed and fixed to the end of the swirl seat away from the lower valve body. A spray hole is opened at a position on the bottom wall of the spray piece corresponding to the swirl hole.

[0013] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the swirl cavity is communicated with at least one diversion hole, and the swirl cavity is communicated with at least one swirl channel.

[0014] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, a plurality of diverter grooves are provided on the side surface of the swirl seat, and the diverter grooves are tightly enclosed with the inner wall of the ejection member to form a rotating flow cavity.

[0015] As a preferred solution of the swirl structure for the swirl injector described in the utility model, a plurality of swirl grooves are provided on the surface of the swirl seat away from one end of the lower valve body. The swirl grooves extend outward from the center of the swirl seat surface to be connected with the flow cavity. The swirl grooves are tightly enclosed with the bottom wall of the ejection member to form a swirl channel.

[0016] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the liquid trough, the guide hole, the diversion hole and the swirl trough are all arranged on the swirl seat of integral design.

[0017] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, a plurality of diversion holes are evenly spaced and arranged in the swirl seat.

[0018] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the swirl grooves are evenly spaced on the swirl seat.

[0019] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the circumferential surface of the sphere along the axis of the ball valve assembly is provided with a plurality of grinding surfaces, and there is a gap between the grinding surfaces and the side wall of the liquid tank.

[0020] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, a sealing sleeve at one end of the lower valve body is welded to one end of the swirl seat.

[0021] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the sealing sleeve of the injection member is welded to the other end of the swirl seat.

[0022] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the diversion groove is a step cut on the side of the swirl seat, and the step and the side wall and bottom wall of the ejection member together form a closed diversion cavity.

[0023] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the swirl hole is opened at an axial position of the swirl seat away from the end surface of the lower valve body.

[0024] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the component body and the sphere are integrally connected.

[0025] As a preferred solution of the swirl structure for the swirl ejector described in the present invention, the swirl hole and the jet hole are coaxially arranged.

[0026] On the one hand, the present invention also provides a swirl ejector, which includes the swirl structure as described in the above technical solution.

[0027] Compared with the prior art, the technical solution of the present invention has at least one or more of the following beneficial effects:

[0028] This patent utilizes the structural design of the swirl seat and spray element to atomize the liquid and spray it quantitatively at a preset spatial location to achieve the desired purpose. For example, in an automobile exhaust system, the urea solution that has passed through the swirl structure is effectively atomized and sprayed quantitatively and spatially into the exhaust pipe to promote the occurrence of selective catalytic reduction reactions, making the overall exhaust after-treatment system more responsive and thereby reducing nitrogen oxides in the exhaust gas. Another example is its application to automobile fuel, where it achieves excellent atomization and small particle size, enabling rapid ignition while also achieving fuel efficiency.

[0029] The patented pre-swirl structure effectively improves the atomization effect of the product and reduces the size of the atomized particles, facilitating a rapid reaction with high efficiency and good results. When used in exhaust emission systems, the swirl injector made with this swirl structure facilitates a rapid reaction between exhaust gas and urea, quickly and effectively reducing the nitrogen oxide content in the emission system, while also being less susceptible to product failures caused by urea crystallization.

[0030] The patented integrated swirl seat design allows for a larger jet hole diameter, effectively preventing small impurities from entering the product and being unable to escape, leading to unstable flow paths and ultimately affecting atomization and flow. It also effectively avoids blockage caused by urea crystallization due to a small jet hole diameter.

[0031] This patent reduces the number of parts, making the assembly process more convenient, effectively saving time and labor costs, and at the same time better ensuring the stability of the assembly process to ensure the consistency of the swirl structure and the swirl ejector performance.

[0032] A conical surface is provided at the bottom of the liquid tank, which fits with the spherical surface of the sphere to form a sealing effect.

[0033] The concentric arrangement of the swirl hole and the jet hole can control the spray volume and spatial distribution of the entire swirl structure. The size of the swirl hole, the cross-sectional area, length, and width of the swirl trough can be adjusted according to actual conditions to adjust the atomization effect of the entire swirl structure and the spatial distribution of the atomized liquid.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 It is a schematic cross-sectional view of the swirl structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the three-dimensional structure of the ball valve assembly of the utility model;

[0038] Figure 3 This is a schematic diagram of the three-dimensional structure of the swirl seat of the utility model from one perspective;

[0039] Figure 4This is a schematic diagram of the three-dimensional perspective structure of the swirl seat of the utility model from another perspective;

[0040] Figure 5 This is a schematic diagram of the three-dimensional structure of the jet component of the utility model;

[0041] Figure 6 It is a schematic cross-sectional view of the swirl ejector of the present invention.

[0042] Among them, 1-lower valve body, 2-ball valve assembly, 3-swirl seat, 4-jet part, 21-assembly body, 22-sphere, 23-grinding surface, 231-gap, 31-liquid groove, 311-vertical wall, 312-inclined wall, 32-conical surface, 33-guide hole, 34-diverter hole, 35-diverter groove, 351-step, 36-swirl groove, 37-swirl hole, 41-jet hole. DETAILED DESCRIPTION

[0043] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0045] In the description of this utility model, unless otherwise expressly specified or limited, terms such as "provided with," "equipped with," "connected," "installed," "mounted," "opened," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0046] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention.

[0047] Please refer to Figure 1-6 ,like Figure 1-6 As shown, the utility model provides a swirl structure for a swirl injector, which is mainly used on a swirl injector, and includes a lower valve body 1, a ball valve assembly 2, a swirl seat 3 and a spray member 4;

[0048] The lower valve body 1 is a hollow cylindrical structure, one end of which is sealed and fixed to one end of the swirl seat 3; the ball valve assembly 2 includes an assembly body 21 and a ball 22 fixedly arranged at one end of the assembly body 21;

[0049] The swirl seat 3 is an integrated design, and is provided with a liquid tank 31, a guide hole 33, a diversion hole 34 and a swirl channel.

[0050] The liquid tank 31 opens toward the lower valve body 1, and the bottom of the liquid tank is a conical surface 32. The ball 22 of the ball valve assembly 2 passes through the lower valve body 1 and is in sealing contact with the conical surface 32 of the swirl seat 3. The ball valve assembly 2 is configured to move toward the swirl seat 3 until the ball 22 is in sealing contact with the conical surface 32, or to move away from the swirl seat 3 until a gap is formed between the ball 22 and the conical surface 32. When the ball 22 of the ball valve assembly 2 moves into sealing contact with the conical surface 32, it can block the liquid from the lower valve body 1 from entering the diversion hole at the bottom of the liquid tank 31. When the ball 22 of the ball valve assembly 2 moves away from the conical surface 32, the liquid from the lower valve body 1 can enter the diversion hole.

[0051] A guide hole 33 is provided at the center of the conical surface 32 of the swirl seat 3. A plurality of diverter holes 34 are provided on the inner wall of the guide hole 33. The diverter holes 34 extend outwardly to the side surface of the swirl seat 3. A transfer cavity is provided on the side surface of the swirl seat 3. A plurality of swirl channels extending outward from the center are provided on the surface of the swirl seat 3 away from the lower valve body 1. The diverter holes 34 and the swirl channels are connected through the transfer cavity. A swirl hole 37 connected to the swirl channels is provided on the surface of the end of the swirl seat 3 away from the lower valve body 1.

[0052] The spray member 4 is a hollow structure with one end open. The open end of the spray member 4 is sealed and fixed to the end of the swirl seat 3 away from the lower valve body 1. A spray hole 41 is opened on the bottom wall of the spray member 4 at a position corresponding to the swirl hole.

[0053] Herein, “several” includes one or more.

[0054] In the example, the swirl channels are all connected to the swirl holes 37, and the diversion holes 34 are also all connected to the corresponding swirl chambers.

[0055] This patent utilizes the structural design of the swirl seat and spray element to atomize the liquid and spray it quantitatively at a preset spatial location to achieve the desired purpose. For example, in an automobile exhaust system, the urea solution that has passed through the swirl structure is effectively atomized and sprayed quantitatively and spatially into the exhaust pipe to promote the occurrence of selective catalytic reduction reactions, making the overall exhaust after-treatment system more responsive and thereby reducing nitrogen oxides in the exhaust gas. Another example is its application to automobile fuel, where it achieves excellent atomization and small particle size, enabling rapid ignition while also achieving fuel efficiency.

[0056] The patented pre-swirl structure effectively improves the atomization effect of the product and reduces the size of the atomized particles, facilitating a rapid reaction with high efficiency and good results. When used in exhaust emission systems, the swirl injector made with this swirl structure facilitates a rapid reaction between exhaust gas and urea, quickly and effectively reducing the nitrogen oxide content in the emission system, while also being less susceptible to product failures caused by urea crystallization.

[0057] The patented integrated swirl seat design allows for a larger jet hole diameter, effectively preventing small impurities from entering the product and being unable to escape, leading to unstable flow paths and ultimately affecting atomization and flow. It also effectively avoids blockage caused by urea crystallization due to a small jet hole diameter.

[0058] This patent reduces the number of parts, making the assembly process more convenient, effectively saving time and labor costs, and at the same time better ensuring the stability of the assembly process to ensure the consistency of the swirl structure and the swirl ejector performance.

[0059] A conical surface is provided at the bottom of the liquid tank, which fits with the spherical surface of the sphere to form a sealing effect.

[0060] Preferably, the swirl hole 37 and the jet hole 41 are coaxially arranged. In the example, the swirl hole 37 is located at the axial center of the swirl seat 3, away from the end surface of the lower valve body 1. In the example, the concentric arrangement of the swirl hole 37 and the jet hole 41 can constrain the injection volume and spatial distribution of the entire swirl structure.

[0061] In a preferred embodiment, one end of the lower valve body 1 is sealed and welded to one end of the swirl seat 3, and the spray member 4 is sealed and welded to the other end of the swirl seat 3. Of course, this patent is not limited to this, as long as they can be fixed and sealed to prevent liquid leakage. In the example, the lower valve body 1 is a thin-walled metal tube. In the example, the ball valve assembly 2 is a cylindrical metal assembly. In the example, the ball 22 is a steel ball. In the example, the spray member 4 is a thin-walled tube with one end open. Preferably, as Figure 1 As shown, the component body 21 and the sphere 22 are connected as one piece, but the present patent is not limited to this. The component body 21 and the sphere 22 can also be fixedly connected separately.

[0062] In a preferred embodiment, the flow chamber is connected to at least one diversion hole 34, and the flow chamber is connected to at least one vortex channel. Figure 3-4 As described above, the diverter holes 34 correspond one-to-one with the vortex chambers, and the vortex chambers correspond one-to-one with the swirl channels. Preferably, multiple diverter holes 34 are evenly spaced within the swirl seat 3. In this example, there are three diverter holes 34. Of course, this patent is not limited to this, and the number of diverter holes 34 can also be two, four, five, or any other number.

[0063] In a preferred embodiment, Figure 1 and Figure 3-4 As described above, a plurality of diverter grooves 35 are provided on the side surface of the swirl seat 3, and the diverter grooves 35 are sealed together with the inner wall of the jet component 4 to form a diverter cavity. In the example, the diverter grooves are steps 351 cut on the side of the swirl seat 3, and the steps 351 and the side walls and bottom walls of the jet component 4 are together enclosed to form a closed diverter cavity. In the example, there are 3 steps 351. Of course, this patent is not limited to this, and there can be any other number of steps 351, such as 2, 4, 5, etc. In the example, the step 351 is provided on the side of the swirl seat 3 close to the end of the jet component 4.

[0064] In a preferred embodiment, Figure 3-4 As shown, the surface of the swirl seat 3, distal to the lower valve body 1, is provided with a plurality of swirl grooves 36. These swirl grooves 36 extend outward from the center of the surface of the swirl seat 3 to communicate with the swirl chamber. The swirl grooves 36 and the bottom wall of the jet element 4 form a closed swirl channel. Preferably, the swirl grooves 36 are evenly spaced and arranged on the swirl seat 3. In this example, there are three swirl grooves 36. Of course, this patent is not limited to this number; the number may be two, four, five, or any other number.

[0065] In the example, the guide hole 33 and the swirl hole 37 are not directly connected. The diverter hole and the swirl channel are not directly connected.

[0066] The size of the swirl hole, the cross-sectional area, length, width, etc. of the swirl groove 36 can be set according to actual conditions to adjust the atomization effect of the entire swirl structure and the spatial distribution of the atomized liquid.

[0067] In a preferred embodiment, Figure 1-2 As shown, the sphere 22 is provided with several ground surfaces 23 on its circumferential surface along the axis of the ball valve assembly. A gap 231 is defined between the ground surfaces 23 and the sidewalls of the liquid tank 31. Preferably, one, two, three, four, five, or any other number of ground surfaces 23 may be provided, and this patent does not limit this. In the example, the sphere 22 is provided with four ground surfaces 23 at equal intervals along its circumferential surface along the axis of the ball valve assembly. The ground surfaces are provided to facilitate the flow of liquid into the swirl seat.

[0068] In a preferred example, Figure 1 、 Figure 4 and Figure 6 As shown, the liquid tank 31 includes a bottom and side walls, the bottom is a conical surface 32, and the side walls include a vertical wall 311 and an inclined wall 312. The vertical wall 311 is arranged at one end of the liquid tank 31 close to the conical surface 32. The vertical wall 311 corresponds to the grinding surface 23 of the sphere 22. The inclined wall 312 gradually inclines toward the side surface of the swirl seat 3 from one end close to the vertical wall 311 to the end close to the opening of the liquid tank 31.

[0069] During use, when the ball 22 of the ball valve assembly 2 moves to a sealed contact with the conical surface 32, the liquid in the lower valve body 1 is blocked from entering the guide hole in the swirl seat. When the ball 22 of the ball valve assembly 2 moves away from the conical surface 32, the liquid in the lower valve body 1 enters the guide hole through the liquid groove 31, and then flows out from the three diversion holes on the side wall of the guide hole, dividing into three equivalent streams of liquid. The three equivalent streams of liquid flow into the swirl groove through the steps on the side of the swirl seat. The liquid in the swirl groove converges in the swirl hole 37, and finally forms a stable atomized solution through the spray hole 41 on the spray part 4. When the swirl injector of this patent is used to treat automobile exhaust, the sprayed atomized solution can fully react with the exhaust to reduce the vehicle's emission of pollutants. The swirl injector of this patent can also be used for fuel injection ignition, etc.

[0070] It should be noted that, in the absence of conflict, the above embodiments or all features in the embodiments may be freely combined.

[0071] In the description of this specification, the reference terms "one embodiment", "some embodiments", "further embodiment", "another embodiment", "other embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify and modify the above embodiments within the scope of the present invention.

Claims

1. A swirl structure for a swirl ejector, characterized in that: It comprises a lower valve body (1), a ball valve assembly (2), a swirl seat (3) and a spray piece (4); The lower valve body (1) is a hollow cylindrical structure, and one end of the lower valve body (1) is sealed and fixed to one end of the swirl seat (3); the ball valve assembly (2) includes an assembly body (21) and a ball (22) fixedly arranged at one end of the assembly body (21); The swirl seat (3) is designed as an integrated body, and is provided with a liquid tank (31), a flow guide hole (33), a flow diversion hole (34) and a swirl channel; The liquid tank (31) opens toward the lower valve body (1), and the bottom of the liquid tank is a conical surface (32). The ball (22) of the ball valve assembly (2) passes through the lower valve body (1) and is in sealing contact with the conical surface (32) of the swirl seat (3). The ball valve assembly (2) is configured to move toward the swirl seat (3) until the ball (22) is in sealing contact with the conical surface (32) or to move away from the swirl seat (3) until a gap is formed between the ball (22) and the conical surface (32). A guide hole (33) is provided at the center of the conical surface (32) of the swirl seat (3), a plurality of diverter holes (34) are provided on the inner wall of the guide hole (33), the diverter holes (34) extend outward to the side surface of the swirl seat (3), a flow conversion cavity is provided on the side surface of the swirl seat (3), a plurality of swirl channels extending outward from the center are provided on the surface of the swirl seat (3) away from the lower valve body (1), the diverter holes (34) and the swirl channels are connected through the flow conversion cavity, and a swirl hole (37) connected to the swirl channel is provided on the surface of the end of the swirl seat (3) away from the lower valve body (1); The spray member (4) is a hollow structure with one end open. The open end of the spray member (4) is sealed and fixed to the end of the swirl seat (3) away from the lower valve body (1). A spray hole (41) is provided at a position on the bottom wall of the spray member (4) corresponding to the swirl hole (37).

2. The swirl structure for a swirl ejector according to claim 1, characterized in that: The flow conversion chamber is in communication with at least one diversion hole (34), and the flow conversion chamber is in communication with at least one cyclonic channel.

3. The swirl structure for a swirl ejector according to claim 2, characterized in that: A plurality of diversion grooves (35) are provided on the side surface of the swirl seat (3), and the diversion grooves (35) and the inner wall of the jet element (4) are tightly closed to form a swirl cavity.

4. The swirl structure for a swirl ejector according to any one of claims 1 to 3, characterized in that: A plurality of swirl grooves (36) are provided on the surface of the swirl seat (3) away from one end of the lower valve body (1). The swirl grooves (36) extend outward from the center of the surface of the swirl seat (3) to communicate with the rotation cavity. The swirl grooves (36) and the bottom wall of the spray member (4) are tightly enclosed to form a swirl channel.

5. The swirl structure for a swirl ejector according to claim 4, characterized in that: A plurality of diversion holes (34) are evenly spaced and arranged in the swirl seat (3); and / or The swirl grooves (36) are evenly spaced and arranged on the swirl seat (3).

6. The swirl structure for a swirl ejector according to claim 1, characterized in that: The sphere (22) is provided with a plurality of grinding surfaces (23) on the circumferential surface along the axis of the ball valve assembly, and a gap (231) is provided between the grinding surface (23) and the side wall of the liquid tank (31).

7. The swirl structure for a swirl ejector according to claim 1, characterized in that: A sealing sleeve at one end of the lower valve body (1) is welded to one end of the swirl seat (3); The sealing sleeve of the jet component (4) is welded to the other end of the swirl seat (3).

8. The swirl structure for a swirl ejector according to claim 3, characterized in that: The diversion groove (35) is a step (351) formed by cutting the side surface of the swirl seat (3), and the step (351) and the side wall and bottom wall of the jet element (4) are combined to form a closed swirl cavity.

9. The swirl structure for a swirl ejector according to claim 1, characterized in that: The swirl hole (37) is opened at an axial position of the swirl seat (3) away from the end surface of the lower valve body (1); and / or The component body (21) and the sphere (22) are integrally connected; and / or The swirl hole (37) and the jet hole (41) are coaxially arranged.

10. A swirl ejector, characterized in that: The invention comprises the swirl structure according to any one of claims 1 to 9.

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