A spray device

Abstract

An injection device includes an injector, the injection device includes a driving component and a valve assembly, the valve assembly includes a valve needle, the injector includes a receiving chamber, a mixing chamber, a diffuser, and a working nozzle, the mixing chamber is located between the receiving chamber and the diffuser, the driving component moves the valve needle relative to the working nozzle to adjust the flow cross-sectional area of ​​the fluid passing through the working nozzle, the receiving chamber is provided with a receiving cavity, the injector is provided with an ejection fluid channel, the working nozzle is provided with a nozzle cavity, a valve needle cavity, and a through hole, the nozzle cavity is connected with the valve needle cavity, the working nozzle includes a supporting part, the receiving cavity is divided into a front cavity and a rear cavity with the supporting part as the boundary, the through hole connects the front cavity with the valve needle cavity, the nozzle cavity is connected with the rear cavity, and the ejection fluid channel is connected with the rear cavity. This injection device still has relatively stable and efficient working performance when the external heat load changes.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a spray device. Background Art

[0002] The ejector can mix two fluids of different pressures and exchange energy to form a mixed fluid of intermediate pressure.

[0003] When the heat load of the ejector refrigeration cycle fluctuates, the ejector refrigeration cycle system operates unstably and the refrigeration performance decreases. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution of the present invention provides a new injection device.

[0005] 1. An injection device, comprising an injector, characterized in that the injection device comprises a driving component and a valve assembly, the valve assembly comprises a valve needle, the injector comprises a receiving chamber, a mixing chamber, a diffuser, and a working nozzle, the mixing chamber is located between the receiving chamber and the diffuser, the driving component causes the valve needle to move relative to the working nozzle so as to be able to adjust the flow cross-sectional area of ​​the fluid through the working nozzle, the receiving chamber is provided with a receiving cavity, the injector is provided with an injection fluid channel, the working nozzle is provided with a nozzle cavity, a valve needle cavity, and a through hole, the nozzle cavity is connected with the valve needle cavity, the working nozzle comprises a supporting portion, the receiving cavity is divided into a front cavity and a rear cavity with the supporting portion as the boundary, the through hole connects the front cavity with the valve needle cavity, the nozzle cavity is connected with the rear cavity, and the injection fluid channel is connected with the rear cavity.

[0006] According to the technical solution of the present invention, the injection device includes a driving component and a valve assembly. The driving component activates the valve assembly to adjust the flow cross-sectional area of ​​the fluid through the working nozzle, thereby adjusting the refrigerant flow rate, so that the injection device still has relatively stable and efficient working performance when the external heat load changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of an embodiment of the injection device of the present invention.

[0008] Figure 2 yes Figure 1 Schematic diagram of the nut assembly of the spray device shown.

[0009] Figure 3 It is a schematic diagram of an implementation of a working nozzle of an injection device.

[0010] Figure 4 yes Figure 3 Partial schematic diagram of the working nozzle shown.

[0011] Figure 5 yes Figure 3 Schematic diagram of the nozzle portion of the working nozzle shown.

[0012] Figure 6 It is a schematic diagram of another embodiment of the working nozzle of the injection device.

[0013] Figure 7 yes Figure 6 Partial schematic diagram of the working nozzle shown.

[0014] Figure 8 yes Figure 6 Schematic diagram of the nozzle portion of the working nozzle shown.

[0015] Fig. 9 This is a schematic diagram of a working nozzle when the nozzle portion and the guide matching portion are integrated. DETAILED DESCRIPTION

[0016] Specific embodiments are now described in detail with reference to the accompanying drawings. In order to fully understand the present invention, numerous specific details are mentioned in the following detailed description. However, it should be understood by those skilled in the art that the specific components, devices and features illustrated in the accompanying drawings and described herein are merely exemplary and should not be considered as limiting.

[0017] Figure 1 An injection device 10 is illustrated, and the injection device 10 includes a driving component 21, a valve assembly 20, and an injector 30.

[0018] The ejector 30 includes a receiving chamber 31, a mixing chamber 32, a diffuser 33, and a working nozzle 34. The mixing chamber 32 is located between the receiving chamber 31 and the diffuser 33. The receiving chamber 31 has a receiving cavity 311, the mixing chamber 32 has a mixing cavity 321, the diffuser 33 has a diffusion cavity 331, and the working nozzle 34 is located in the receiving cavity 311.

[0019] The ejector 30 is provided with a working fluid channel 35 and an ejection fluid channel 36 . The working fluid channel 35 is communicated with the receiving cavity 311 , and the ejection fluid channel 36 is communicated with the receiving cavity 311 . Figure 1 In the embodiment shown, the axis of the working fluid channel 35 is perpendicular to the axis of the receiving cavity 311. This arrangement facilitates the working fluid to enter the working nozzle 34. The angle between the axis of the ejection fluid channel 36 and the axis of the receiving cavity 311 is 30° to 60°. This arrangement enables the ejection fluid to be successfully ejected by the working fluid, and at the same time, the loss of mixed kinetic energy of the working fluid and the ejection fluid is small.

[0020] The driving component 21 is an electromagnetic coil assembly, and the valve assembly 20 includes a housing 22, a fixing seat 23, a nut assembly 24, a spring guide rail 25, a stopper slip ring 26, a magnetic rotor 27, a screw sleeve 28, a stopper component 29, and a screw valve needle 241. The driving component 21 can move the screw valve needle 241 relative to the working nozzle 34, thereby adjusting the flow cross-sectional area of ​​the fluid passing through the working nozzle 34. The coordination of the various components in the valve assembly 20 can adopt various forms in the prior art, which will not be repeated here.

[0021] like Figure 2 As shown, the nut assembly 24 includes a nut 242 and a connecting piece 243, and the connecting piece 243 is relatively fixed to the nut 242. The connecting piece 243 is fixed to the fixing seat 23. The nut 242 is made of non-metallic materials such as plastic. The connecting piece 243 can be used as an insert and integrally molded with the nut 242 through a mold molding method to form an assembly. The nut assembly 24 includes a mating portion 244. In this embodiment, the mating portion is a part of the nut 242, and the mating portion 244 is located on a side of the nut 242 close to the mixing chamber 32.

[0022] like Figure 3As shown, the working nozzle 34 includes a guide matching portion 341, a support portion 342, and a nozzle portion 343, wherein the support portion 342 is located between the nozzle portion 343 and the guide matching portion 341. At least a portion of the guide matching portion 341 cooperates with the matching portion 244 to achieve positioning between the nut assembly 24 and the working nozzle 34. The support portion 342 includes a sealing groove 3421, which is opened around the support portion 342, and a sealing ring can be arranged in the sealing groove 3421. At least a portion of the sealing ring is fitted with the inner wall corresponding to the receiving cavity 311 to achieve sealing. The receiving cavity 311 is divided into a front cavity 312 and a rear cavity 313 with the support portion 342 as the boundary. The front cavity 312 is connected to the working fluid channel 35, and the rear cavity 313 is connected to the ejection fluid channel 36. The working nozzle 34 is provided with a valve needle chamber 344, a nozzle chamber 345, and a through hole 347. The nozzle chamber 345 is provided in the nozzle portion 343, the valve needle chamber 344 is provided in the guide matching portion 341, and the valve needle chamber 344 is connected with the nozzle chamber 345. The through hole 347 connects the valve needle chamber 344 with the front chamber 312, and there may be two or more through holes 347. The nozzle chamber 345 is connected with the rear chamber 313. The working nozzle includes a throttle port, and the throttle port is located between the valve needle chamber 344 and the nozzle chamber 345. The screw valve needle 241 can reciprocate along the axial direction of the receiving chamber 311 to control the opening of the throttle port. The shape of the nozzle chamber 345 can adopt the cavity shape corresponding to the divergent nozzle or the Rafale nozzle (divergent nozzle). The position where the flow area of ​​the valve needle chamber 344 and the nozzle chamber 345 is the smallest is defined as the valve port 346. The screw valve needle 241 includes a valve needle, a part of which is located in the valve needle cavity 344 and the valve needle can move up and down in the valve needle cavity 344 to control the opening and closing of the valve port 346. The screw valve needle 241 can reciprocate relative to the nut assembly 24 along the axial direction of the receiving cavity 311, and at least a part of the inner wall corresponding to the valve needle cavity 344 cooperates with at least a part of the screw valve needle 241 to guide the screw valve needle 241.

[0023] The nozzle portion 343 and the guide matching portion 341 are separately provided. The maximum outer diameter of the support portion 342 is greater than the maximum outer diameter of the nozzle portion 343 , and the maximum outer diameter of the support portion 342 is greater than the maximum outer diameter of the guide matching portion 341 .

[0024] A kind of Figure 3 In the working nozzle 34 shown in the embodiment, the guide matching portion 341 and the support portion 342 are integrally arranged. Figure 4 The support portion 342 includes a mounting groove 348, and the axis of the mounting groove 348 coincides with the axis of the valve needle chamber 344. Figure 5 As shown, the nozzle portion 343 includes a mounting portion 349. The mounting portion 349 extends into the mounting groove 348. Of course, the support portion may be provided with the mounting portion and the nozzle portion may be provided with the mounting groove to achieve the same technical effect.

[0025] In another embodiment, the working nozzle 34 is as follows Figure 6The support portion 342 and the nozzle portion 343 are integrally arranged, as shown in FIG. Figure 7 The support portion 342 includes a mounting groove 348, and the axis of the mounting groove 348 coincides with the axis of the nozzle cavity 345. Figure 8 As shown, the guide matching portion 341 includes a mounting portion 349. The mounting portion 349 extends into the mounting groove 348. Of course, the support portion may be provided with the mounting portion and the guide matching portion may be provided with the mounting groove to achieve the same technical effect.

[0026] The outer diameter of the nozzle portion 343 located in the receiving chamber gradually decreases in the direction away from the guide fitting portion 341.

[0027] The boundary between the mixing cavity 321 and the receiving cavity 311 is defined as the reference position, and the connection between the ejection fluid channel 36 and the receiving cavity 311 is defined as the ejection position.

[0028] The distance between the end of the nozzle portion 343 away from the guide matching portion 341 and the base position is less than or equal to the distance between the ejection position and the reference position.

[0029] The distance between the mounting groove 348 and the reference position is greater than the distance between the ejection position and the reference position.

[0030] The driving component 21 activates the valve assembly 20 to adjust the flow cross-sectional area of ​​the fluid through the working nozzle 34, thereby adjusting the refrigerant flow rate, so that the injection device 10 still has a relatively stable and efficient working performance when the external heat load changes.

[0031] The structure in which the guide matching part, the support part and the nozzle part are integrally arranged is as follows Fig. 9 As shown in the figure, this structure is difficult to process due to the long length of the working nozzle. For working nozzles with certain precision requirements, it is difficult to achieve the precision requirements when processing this structure. Figure 3 and Figure 6 The working nozzle shown is compared to Fig. 9 The working nozzle shown is easier to process and has higher precision. Figure 3 The working nozzle shown can adjust the working performance of the ejector by replacing the nozzle part, so as to be applied to different working conditions; Figure 6 The working nozzle shown can adapt to the integration requirements of different valve assemblies by replacing the matching parts, so that the same injector can be adapted to the integration requirements of different valve assemblies.

Claims

1. An injection device, comprising an injector, characterized in that: The injection device includes a driving component and a valve assembly, the valve assembly includes a valve needle, the injector includes a receiving chamber, a mixing chamber, a diffuser, and a working nozzle, the mixing chamber is located between the receiving chamber and the diffuser, the driving component causes the valve needle to move relative to the working nozzle so as to be able to adjust the flow cross-sectional area of ​​the fluid passing through the working nozzle, the receiving chamber is provided with a receiving cavity, the injector is provided with an injection fluid channel, the working nozzle is provided with a nozzle cavity, a valve needle cavity, and a through hole, the nozzle cavity is connected to the valve needle cavity, the working nozzle includes a supporting portion, the receiving cavity is divided into a front cavity and a rear cavity with the supporting portion as the boundary, and the front cavity is formed along the axial direction. The receiving chamber faces the direction of the mixing chamber, and the inner diameter of the wall corresponding to the rear chamber gradually decreases from the supporting part to the connection between the rear chamber and the mixing chamber. The through hole connects the front chamber and the valve needle chamber, the nozzle chamber is connected to the rear chamber, and the injection fluid channel is connected to the rear chamber. The angle between the axis of the injection fluid channel and the axis of the receiving chamber is 30°~60°; the boundary between the mixing chamber and the receiving chamber is defined as the reference position, the connection between the injection fluid channel and the receiving chamber is defined as the injection position, and the distance between the end of the nozzle part away from the guide matching part and the basic position is less than or equal to the distance between the injection position and the reference position.

2. The spraying device according to claim 1, characterized in that The working nozzle includes a nozzle portion and a guide matching portion, the support portion is located between the nozzle portion and the guide matching portion, the nozzle cavity is opened in the nozzle portion, the valve needle cavity is opened in the guide matching portion, the shape of the nozzle cavity is the cavity shape corresponding to a divergent nozzle or a Rafale nozzle, and the guide matching portion is separately arranged from the nozzle portion.

3. The spraying device according to claim 2, characterized in that The valve assembly includes a nut assembly, and the valve needle can reciprocate relative to the nut assembly along the axial direction of the receiving cavity. At least a portion of the inner wall corresponding to the valve needle cavity cooperates with at least a portion of the valve needle. The nut assembly includes a mating portion, and the mating portion cooperates with at least a portion of the guide mating portion.

4. The spraying device according to claim 2, characterized in that The support portion comprises a sealing groove, the sealing groove is opened around the support portion, a sealing ring is arranged in the sealing groove, and at least a part of the sealing ring is in contact with the inner wall corresponding to the receiving cavity.

5. The spraying device according to claim 2, characterized in that The angle between the axis of the ejection fluid channel and the axis of the receiving cavity is 30° to 60°; the ejector is provided with a working fluid channel, and the axis of the working fluid channel is perpendicular to the axis of the receiving cavity.

6. The spraying device according to any one of claims 2 to 5, characterized in that: The support portion and the guide matching portion are integrally arranged, one of the support portion and the nozzle portion is provided with a mounting groove, and the other is provided with a mounting portion, and the mounting portion extends into the mounting groove for fixing.

7. The spraying device according to any one of claims 2 to 5, characterized in that: The support portion is integrally arranged with the nozzle portion, one of the support portion and the guide matching portion is provided with a mounting groove, and the other is provided with a mounting portion, and the mounting portion extends into the mounting groove for fixing.

8. The spraying device according to claim 6, characterized in that The maximum outer diameter of the support portion is greater than the maximum outer diameter of the nozzle portion, and the maximum outer diameter of the support portion is greater than the maximum outer diameter of the guide matching portion; the outer diameter of the nozzle portion located in the receiving chamber gradually decreases in the direction away from the guide matching portion.

9. The spraying device according to claim 7, characterized in that: The maximum outer diameter of the support portion is greater than the maximum outer diameter of the nozzle portion, and the maximum outer diameter of the support portion is greater than the maximum outer diameter of the guide matching portion; the outer diameter of the nozzle portion located in the receiving chamber gradually decreases in the direction away from the guide matching portion.

10. The spraying device according to claim 8 or 9, characterized in that: The mixing chamber is provided with a mixing cavity, the boundary between the mixing cavity and the receiving cavity is defined as a reference position, and the connection between the injection fluid channel and the receiving cavity is defined as an injection position; the distance between the end of the nozzle portion away from the guide matching portion and the reference position is less than or equal to the distance between the injection position and the reference position; the distance between the mounting groove and the reference position is greater than the distance between the injection position and the reference position.

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