CN117704666A - Injector, method of manufacturing the injector, and thermal management system - Google Patents

Abstract

The injector comprises a shell, a connecting seat, a valve seat assembly and a valve core assembly, wherein the shell is connected with the connecting seat and forms part of wall parts of the mounting cavity, at least part of the valve seat assembly is positioned in the mounting cavity, the valve seat assembly is provided with a valve port, the valve core assembly comprises a valve core, the valve core can move towards a direction approaching or separating from the valve port, and a gap is reserved between the valve seat assembly and the connecting seat; this way the injector is advantageous for improving the positional stability of the valve port.

Description

Injector, method of manufacturing the injector, and thermal management system

Technical Field

The present application relates to the field of fluid management, and in particular to an injector, a method of manufacturing the injector, and a thermal management system.

Background

In air conditioning systems or thermal management systems, an injector is a common component, with a valve port in the injector being located in a valve seat assembly, the position of the valve port having an effect on the fluid pressure of the injector.

Generally, the valve seat assembly is located in the housing, and when the connecting seat is connected with the housing, the position of the valve seat assembly is easily affected, so how to design the injector structure, and the stability of the valve port position is improved is needed to be solved.

Disclosure of Invention

The invention aims to provide an injector, a manufacturing method thereof and a thermal management system, which are beneficial to improving the position stability of a valve port.

In one aspect, an embodiment of the present invention provides an injector, the injector having a mounting cavity, the injector including a housing, a connection seat, a valve seat assembly, and a valve element assembly, the housing and the connection seat being connected and each forming part of a wall portion of the mounting cavity, at least part of the valve seat assembly being located in the mounting cavity, the valve seat assembly having a receiving cavity and a valve port, the valve element assembly including a valve element, the valve element being movable in a direction approaching or separating from the valve port, wherein a gap is provided between the valve seat assembly and the connection seat.

According to the injector provided by the embodiment of the invention, the gap is formed between the valve seat assembly and the connecting seat, so that compared with the connection between the connecting seat and the valve seat assembly, if the connecting seat moves relative to the shell, the influence of the connecting seat on the position of the valve seat assembly can be reduced, and the position stability of the valve port can be improved.

In another aspect, an embodiment of the present invention further provides a thermal management system, where the thermal management system includes a compressor, a condenser, a first evaporator, a second evaporator, a throttling element, a gas-liquid separator, and an ejector according to the foregoing, where the compressor is in communication with a first inlet of the ejector through the condenser, an outlet of the ejector is in communication with a first interface of the gas-liquid separator through the second evaporator, a second interface of the gas-liquid separator is in communication with an inlet of the compressor, a third interface of the gas-liquid separator is in communication with an inlet of the first evaporator through the throttling element, and an outlet of the first evaporator is in communication with a second inlet of the ejector.

According to the thermal management system provided by the embodiment of the invention, the gap is formed between the valve seat assembly and the connecting seat in the injector, so that at least part of the connecting seat can reduce the influence of the connecting seat on the valve seat assembly in the process of being mounted on the shell, the valve port movement caused by the connecting seat is reduced, the position stability of the valve port is improved, and the pressure change of working fluid in the thermal management system is further reduced.

In still another aspect, an embodiment of the present invention further provides a method for manufacturing an injector, including:

disposing at least a portion of the valve seat assembly within the mounting cavity of the housing;

at least part of the connecting seat is installed on the shell, and a gap is formed between the connecting seat and the valve seat assembly.

According to the manufacturing method of the injector, provided by the embodiment of the invention, the connecting seat is arranged in the shell, so that a gap is formed between the connecting seat and the valve seat assembly, the influence of the connecting seat on the valve seat assembly can be reduced, and the position stability of the valve port is improved.

Drawings

FIG. 1 is a schematic diagram of a connection block of a thermal management system according to one embodiment of the present invention;

FIG. 2 is a schematic perspective view of an injector according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an injector shown in FIG. 2;

FIG. 4 is a schematic elevational view of one of the injectors shown in FIG. 2;

FIG. 5 is a schematic cross-sectional view of one of the injectors shown in FIG. 4 taken along the A-A direction;

FIG. 6 is an enlarged schematic view of the injector shown in FIG. 5 at Q1;

FIG. 7 is a schematic cross-sectional view of a housing provided in accordance with one embodiment of the present invention;

FIG. 8 is a schematic diagram of an exploded construction of a valve seat assembly provided in accordance with one embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of a valve seat assembly shown in FIG. 8;

FIG. 10 is a schematic view of a seal provided by an embodiment of the present invention;

fig. 11 is a schematic perspective sectional structure of the connection seat shown in fig. 2;

FIG. 12 is an enlarged schematic view of the injector shown in FIG. 5 at Q2;

FIG. 13 is a schematic cross-sectional view of an injector according to another embodiment of the present invention;

FIG. 14 is a schematic perspective view of one of the valve cartridge assemblies shown in FIG. 13;

FIG. 15 is a schematic cross-sectional view of an ejector according to still another embodiment of the present invention;

FIG. 16 is an enlarged schematic view of the injector at Q3 of one of the injectors shown in FIG. 15;

fig. 17 is a schematic block diagram of a method of manufacturing an injector provided by an embodiment of the invention.

Description of the drawings:

1. a thermal management system; 100. an ejector; 101. a mounting cavity; 10. a housing; 11. a first channel; 111. a first passage port; 112. a mixing section; 113. a diffusion section; 114. a buffer section; 12. a second channel; 121. a second port; 13. a third channel; 131. a third port; 14. a first wall portion; 15. a limit part; 161. a first inlet; 162. a second inlet; 163. an outlet; 20. a valve core assembly; 21. a valve core; 22. a valve stem; 221. the first limiting part, 222 and the threaded part; 223. a flange portion; 224. a second limit part; 30. a valve seat assembly; 31. a receiving chamber; 32. a valve port; 33. a mating portion; 34. a communication passage; 35. a valve seat; 351. a cone portion; 36. a guide member; 361. a guide hole; 362. an elastic part; 363. a body; 37. a gasket; 40. a seal; 41. a first portion; 42. a second portion; 43. a connection portion; 50. a control assembly; 51. a housing; 52. a control board; 53. a nut assembly; 54. a stator assembly; 55. a rotor assembly; 56. a sleeve; 57. a fastener; 61. a connecting seat; 611. installing a duct; 62. a seal ring; 200. a compressor; 300. a condenser; 400. a second evaporator; 500. a gas-liquid separator; 501. a first interface; 502. a second interface; 503. a third interface; 600. a first evaporator; 700. and a control valve.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described hereinafter, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and the specific embodiments. Relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any such actual relationship or order between the elements.

Referring to fig. 1, an embodiment of the present invention provides a thermal management system 1, which thermal management system 1 can be applied to a new energy vehicle. The thermal management system 1 provided by the embodiment of the invention comprises a first evaporator 600 and a second evaporator 400, wherein the first evaporator 600 can be positioned in an air conditioning box of a new energy vehicle and used for adjusting the temperature in the vehicle cabin, and the second evaporator 400 can be used for adjusting the temperature of a battery so that the battery can work in a reasonable temperature range. Alternatively, the second evaporator 400 may be a direct cooling plate or a plate heat exchanger, which is beneficial to improving the heat exchange efficiency of the battery and the service life of the battery by providing the second evaporator 400.

Further, the thermal management system 1 may further include a compressor 200, a condenser 300, an ejector 100, a first evaporator 600, a second evaporator 400, and a gas-liquid separator 500, where the ejector 100 has a first inlet 161, a second inlet 162, and an outlet 163, and the gas-liquid separator 500 has a first interface 501, a second interface 502, and a third interface 503, where the working fluid of the thermal management system 1 includes a refrigerant, and the refrigerant may be carbon dioxide or R134a, etc., specifically, the first interface 501 is an inlet of the refrigerant in a gas-liquid mixed state, the second interface 502 is an outlet of the gaseous refrigerant, and the third interface 503 is an outlet of the liquid refrigerant. The outlet of the compressor 200 is communicated with the inlet of the condenser 300, the outlet of the condenser 300 is communicated with the first inlet 161 of the ejector 100, the outlet 163 of the ejector 100 is communicated with the inlet of the second evaporator 400, the outlet of the second evaporator 400 is communicated with the first port 501 of the gas-liquid separator 500, the second port 502 of the gas-liquid separator 500 is communicated with the inlet of the compressor 200, the third port 503 of the gas-liquid separator 500 is communicated with the inlet of the first evaporator 600 through a throttling element, and the outlet of the first evaporator 600 is communicated with the second inlet 162 of the ejector 100. In operation of the thermal management system, refrigerant entering the ejector 100 via the second inlet 162 mixes with refrigerant entering the ejector 100 through the first inlet 161 and enters the second evaporator 400. The communication relationship of two components herein includes direct communication, communication through a conduit, communication through other elements, and communication through a conduit and other elements. By providing three interfaces in the ejector 100, connection with other components in the thermal management system 1 can be simplified, and at the same time, the ejector 100 can realize flow adjustment, and further adjust the pressure of the refrigerant passing through the second evaporator 400, so that the temperature of the refrigerant entering the second evaporator 400 can be within a proper range, and when the second evaporator 400 is used for heat exchange of the battery, the heat exchange efficiency of the battery and the service life of the battery can be improved.

In order to achieve the above-mentioned functions of the thermal management system, the embodiment of the present invention further provides an ejector 100, referring to fig. 1 to 7, the ejector 100 includes a housing 10, a first inlet 161, a second inlet 162, and an outlet 163 may be formed in the housing 10, the housing 10 further includes a first channel 11, a second channel 12, and a third channel 13, where the first channel 11 communicates with the outlet 163, the second channel 12 communicates with the first inlet 161, and the third channel 13 communicates with the second inlet 162, and the first channel 11 is an outflow channel of the refrigerant, the second channel 12 is one of inflow channels of the refrigerant, and the third channel 13 is another inflow channel of the refrigerant. The first channel 11 includes a mixing portion 112 and a diffusing portion 113, and the refrigerant flowing out of the second channel 12 and the refrigerant flowing out of the third channel 13 are mixed in the mixing portion 112, and the refrigerant of the mixing portion 112 is communicated with an outlet 163 after passing through the diffusing portion 113.

To regulate the pressure of the refrigerant exiting the ejector 100, in some embodiments, the cross-sectional flow area of the diffuser portion 113 near the outlet 163 is greater than the cross-sectional flow area of the diffuser portion 113 near the mixing portion 112, with the cross-sectional flow area of the diffuser portion 113 gradually increasing in a direction in which the mixing portion 112 is directed toward the diffuser portion 113. In this way, the mixing portion 112 and the diffusing portion 113 may be designed according to the cooling requirement, optionally, a buffer portion 114 may be further disposed between the diffusing portion 113 and the outlet 163, the diameter of the inner hole of the buffer portion 114 is the same as the diameter of the inner hole at the end of the diffusing portion 113, and the diameter of the inner hole of the buffer portion 114 may be smaller than the inner hole of the outlet 163, so that the temperature of the second evaporator 400 is in a reasonable range, such as 18-35 ℃ under the condition of determining the heat exchange condition of the evaporator and the superheat after throttling.

In this embodiment, the second evaporator 400 may be disposed close to the battery and directly exchange heat with the battery through the refrigerant, or two channels, such as a plate heat exchanger, may be disposed in the second evaporator 400, where one channel is used for refrigerant circulation and the other channel is used for cooling liquid circulation, and the refrigerant and the cooling liquid exchange heat with the battery in the second evaporator 400.

Referring further to fig. 1 to 7, in operation of the thermal management system 1, high temperature and high pressure refrigerant discharged from the compressor 200 enters the condenser 300, the refrigerant passing through the condenser 300 is cooled, then the refrigerant passing through the first inlet 161 of the ejector 100 enters the ejector 100, the refrigerant flowing out of the outlet 163 of the ejector 100 enters the second evaporator 400, the refrigerant passing through the second evaporator 400 enters the gas-liquid separator 500 through the first interface 501 of the gas-liquid separator 500, the refrigerant is separated into a gas phase refrigerant and a liquid phase refrigerant in the gas-liquid separator 500, the gas phase refrigerant is sucked to the inlet of the compressor 200 through the second interface 502 of the gas-liquid separator 500, the liquid phase refrigerant enters the first evaporator 600 through the third interface 503 of the gas-liquid separator 500, the refrigerant flowing through the first evaporator 600 enters the ejector 100 through the second inlet 162 of the ejector 100, the refrigerant entering the ejector 100 through the second inlet 162 of the first evaporator enters the gas-liquid separator 500 through the first interface 501, and the refrigerant entering the gas-liquid separator 500 through the first evaporator 500 at the mixing portion 112, such that the refrigerant is mixed at the mixing portion and the temperature of the refrigerant is diffused by the first evaporator 400 before the mixed refrigerant enters the first evaporator 400 at the high temperature and the second evaporator-diffusion portion.

In some embodiments, the thermal management system 1 further includes a control valve 700, and the control valve 700 is disposed between the first evaporator 600 and the gas-liquid separator 500 along the flow direction of the working fluid, and the on-off of the flow path and the flow rate are controlled by the control valve 700. It should be noted that, when the battery temperature is low or no load is applied, the evaporation amount of the refrigerant entering the second evaporator 400 is small, or no heat exchange occurs, which does not affect the operation of the whole system, and the thermal management system 1 can be controlled by adjusting the flow rate of the first inlet 161 of the ejector 100 and the flow rate entering the first evaporator 600, so that the efficient operation of the thermal management system 1 is realized; also, when the load of the first evaporator 600 is relatively low or there is no load, the opening degree of the control valve 700 may be controlled to reduce or shut off the flow rate of the first evaporator 600, and the load of the second evaporator 400 may be adjusted by the flow rate of the first inlet 161 of the ejector 100.

Referring to fig. 2 to 9, the ejector 100 includes a control assembly 50 and a functional assembly, and portions of the control assembly 50 and portions of the functional assembly are arranged in a height direction of the ejector 100. Specifically, the control assembly 50 includes a housing 51, a stator assembly 54, a rotor assembly 55, a sleeve 56 and a control board 52, the housing 51 is fixedly connected with the stator assembly 54, in this embodiment, a lower shell of the housing 51 may be injection-molded and fixed with the stator assembly 54, an upper shell of the housing 51 and a lower shell of the housing 51 may be ultrasonically welded or laser welded, the shell 10 of the functional assembly is fixedly connected with the housing 51 by fasteners 57 such as screws, and at least part of the rotor assembly 55 is located on a side of the connecting seat 61 facing away from the valve seat assembly 30. The control board 52 is disposed in the inner cavity of the housing 51, and the control board 52 is electrically connected with the stator assembly 54 and controls the energization or de-energization of the stator assembly 54.

In some embodiments, the injector 100 has a mounting cavity 101, the functional components of the injector 100 include a housing 10, a valve core assembly 20, a valve seat assembly 30, a connecting seat 61 and a sealing member 40, the housing 10 and the connecting seat 61 are connected and each form part of a wall of the mounting cavity 101, at least part of the valve seat assembly 30 is located in the mounting cavity 101, the valve seat assembly 30 has a containing cavity 31 and a valve port 32, the valve core assembly 20 includes a valve core 21 and a valve stem 22, the valve core 21 and the valve stem 22 are integrally formed or fixedly connected, the valve core 21 is located in the containing cavity 31, the valve stem 22 can drive the valve core 21 to move towards or away from the valve port 32, optionally, the valve core 21 can move along the height direction of the injector 100, so that the valve core 21 of the valve core assembly 20 can adjust the flow cross-sectional area at the valve port 32 to control the flow of the refrigerant passing through the valve port 32.

To effect movement of the valve spool 21, as shown in fig. 5-15, in some embodiments, the injector 100 further includes a nut assembly 53, the nut assembly 53 being located on a side of the connection seat 61 facing away from the valve seat assembly 30, the nut assembly 53 being in a limited arrangement with the connection seat 61, e.g., the nut assembly 53 may contact and connect with the connection seat 61, or the nut assembly 53 may connect with the connection seat 61 via other components. The valve stem 22 included in the valve cartridge assembly 20 is screw-fitted with the nut assembly 53 through the mounting hole 611 of the coupling seat 61, and a portion of the nut assembly 53 is sleeved to the outer circumferential side of the valve stem 22, thereby guiding the valve cartridge assembly 20. The stator assembly 54 is disposed on the outer periphery of the rotor assembly 55, the sleeve 56 isolates the rotor assembly 55 from the stator assembly 54, the rotor assembly 55 is disposed on the inner periphery of the sleeve 56, the stator assembly 54 is disposed on the outer periphery of the sleeve 56, and the rotor assembly 55 can drive the valve core assembly 20 to move. The valve seat assembly 30 is fixedly disposed relative to the housing 10.

In particular embodiments, the valve stem 22 of the valve core assembly 20 is integrally formed with the valve core 21, with one portion of the valve stem 22 being positioned within the mounting channel 611 and another portion of the valve stem 22 being coupled to the rotor assembly 55. Alternatively, the valve stem 22 may be drivingly connected to the rotor assembly 55 via a connection, such as an interference fit or a weld or a fastener such as a screw, pin, etc., to enable the rotor assembly 22 to rotate the valve stem 22 in unison.

When the valve element assembly 20 moves, if the restriction on the valve element assembly 20 is insufficient, the valve element assembly 20 may generate deflection during the movement, and the coaxiality requirement of the valve element assembly 20 and the valve seat assembly 30 cannot be met, so that the flow adjustment accuracy of the injector 100 is affected. In addition, when the length of the valve stem 22 is long, if the strength of the valve stem 22 is poor, when the rotor assembly 55 rotates, the risk of rubbing the rotor assembly 55 against the inner wall of the sleeve 56 is increased, and vibration and noise are generated, which affects the use of the injector 100.

To improve the above problem, in some embodiments, the valve stem 22 includes a first limiting portion 221 and a second limiting portion 224, where the first limiting portion 221 and the second limiting portion 224 are disposed at intervals along the axial direction of the valve stem 22, the first limiting portion 221 is located on the inner peripheral side of the nut assembly 53, and the first limiting portion 221 is in clearance fit with the nut assembly 53, and the second limiting portion 224 is in clearance fit with the connecting seat 61. Through the arrangement, the valve rod 22 can be radially supported at two positions through the first limiting part 221 and the second limiting part 224, the span between supporting points is large, the rigidity of the valve rod 22 is enhanced, the deflection in the movement process of the valve core assembly 20 is conveniently reduced, the centering degree of the valve core assembly 20 and the valve seat assembly 20 is improved, and the flow regulation precision of the injector 100 is conveniently improved.

In some embodiments, the valve stem 22 further includes a threaded portion 222, the threaded portion 222 being located between the first stop 221 and the second stop 224 along the axial direction of the valve stem 22, the threaded portion 222 being threadedly engaged with the nut assembly 53. Through the above arrangement, it is convenient to increase the axial distance between the first limiting portion 221 and the second limiting portion 224, and it is convenient to better support the valve stem 22.

Further, in order to limit the movement position of the valve stem 22, in some embodiments, the valve core assembly 20 further includes a flange portion 223, where the flange portion 223 may be integrally formed with the valve stem 22 or separately provided and in a limiting connection with the valve stem 22, for example, the flange portion 223 may be in an interference fit with the valve stem 22 or welded or the like to achieve a limiting connection with the valve stem 22, the flange portion 223 is located on a side of the connecting seat 61 away from the valve seat assembly 30 along the axial direction of the valve stem 22, at least a part of the radial dimension of the flange portion 223 is greater than the radial dimension of the mounting hole 611 facing the opening of the flange portion 223, and the flange portion 223 can abut against one of the connecting seat 61 and the nut assembly 53 to limit the movement position of the valve stem 22.

In order to provide the injector 100 with a better sealing performance, in some embodiments, the sealing member 40 is sleeved to a part of the outer circumferential side of the connection seat 61 to limit the radial position of the sealing member 40, in conjunction with fig. 2 to 10. The seal member 40 includes a first portion 41, a second portion 42, and a connecting portion 43, the connecting portion 43 being connected between the first portion 41 and the second portion 42 in a radial direction of the seal member 40, an extending direction of the first portion 41 intersecting an extending direction of the connecting portion 43, an extending direction of the second portion 42 intersecting an extending direction of the connecting portion 43, and an extending direction of the first portion 41 being opposite to an extending direction of the second portion 42, the first portion 41 extending from the connecting portion 43 toward an axial direction near the seal member 40, and the second portion 42 extending from the connecting portion 43 toward an axial direction far from the seal member 40, as shown in fig. 10. The first portion 41, the second portion 42, and the connection portion 43 are each of a thin plate structure, and by the above arrangement, when the seal member 40 is mounted between the connection seat 61 and the housing 10, the connection seat 61 and the housing 10 can be pressed in the height direction of the injector 100, so that the seal member 40 is deformed, thereby achieving sealing between the connection seat 61 and the housing 10.

Alternatively, at least part of the connection seat 61 is embedded in the housing 10, and the connection seat 61 is screwed with the housing 10, and the sealing member 40 is clamped between the connection seat 61 and the housing 10 under the action of the screw force. In a specific implementation, the housing 10 may be provided with a first threaded portion having an internal thread, the connection seat 61 may be provided with a second threaded portion having an external thread, and when the connection seat 61 is installed, the connection seat 61 may be moved close to the housing 10 through a threaded connection therebetween, so as to compress the sealing member 40 between the connection seat 61 and the housing 10; alternatively, no screw structure may be provided on both the housing 10 and the connection seat 61, and the seal member 40 may be compressed by the screw action of the fastener 57.

Referring further to fig. 2-14, in some embodiments, the housing 10 has a first passageway 11, a second passageway 12, and a third passageway 13, the second passageway 12 being capable of communicating with the first passageway 11 through the valve port 32, the mounting cavity 101, and the third passageway 13 being capable of communicating with the first passageway 11 through the mounting cavity 101; the first passage 11 has a first passage opening 111 toward the valve port 32, the housing 10 includes a first wall portion 14, the first wall portion 14 forms part of the wall portion of the mounting chamber 101, and the cross-sectional dimension of the first wall portion 14 decreases in a direction in which the valve port 32 is directed toward the first passage opening 111, for example, in a direction in which the valve port 32 is directed toward the first passage opening 111, the cross-sectional dimension of the first wall portion 14 decreases, and herein, the cross-section of the first wall portion 14 refers to a cross-section obtained by cutting the housing 10 in a direction perpendicular to the height direction of the injector 100. Further, along the height of the injector 100, the first passage opening 111 and the valve port 32 have a predetermined distance a, alternatively, the predetermined distance a may be 3.03 mm, and the third passage 13 has a third passage opening 131 facing the mounting chamber 101, the third passage opening 131 being located at the first wall portion 14. By the above arrangement, the pressure and flow rate of the refrigerant flowing out of the valve port 32 can be well regulated, the pressure loss of the refrigerant flowing out of the valve port 32 can be reduced, the high-pressure fluid flowing out of the valve port 32 can have a good drainage effect with respect to the low-pressure fluid flowing out of the third channel port 131, and the fluid flowing out of the valve port 32 can be well regulated in pressure.

Because of this, since the packing 40 needs to be subjected to a pressing force in the height direction of the injector 100, it is moved against the housing 10 to press the packing 40 during the installation of the connection seat 61, and if the connection seat 61 is connected to the valve seat assembly 30, the valve seat assembly 30 is also synchronously pressed against the housing 10 along with the connection seat 61 during the movement of the connection seat 61 against the housing 10 to compress the packing 40, so that the distance between the first passage port 111 and the valve port 32 in the height direction of the injector 100 is compressed, and the drainage effect of the high-pressure fluid flowing out of the valve port 32 against the low-pressure fluid flowing out of the third passage port 131 is affected.

To address the above, in some embodiments, there is a gap between the valve seat assembly 30 and the connection seat 61 in either direction to prevent the connection seat 61 from causing movement of the valve seat assembly 30 during compression of the seal 40.

As shown in fig. 3 to 5, in some embodiments, the valve seat assembly 30 is entirely located in the mounting chamber 101, and the valve seat assembly 30 is spaced apart from the connection seat 61 in the height direction of the injector 100, and optionally, a gap between the valve seat assembly 30 and the connection seat 61 is greater than a compression distance of the sealing member 40 to prevent the connection seat 61 from affecting the valve seat assembly 30 during compression of the sealing member 40.

To limit the valve seat assembly 30, in some embodiments, as shown in fig. 5 to 9, the housing 10 includes a limit portion 15, the valve seat assembly 30 includes a mating portion 33, the limit portion 15 is disposed in a limit manner with the mating portion 33, optionally, the limit portion 15 is a step portion, and the mating portion 33 abuts against the step limit portion 15 to limit the axial position of the valve seat assembly 30 in the housing 10, so as to satisfy a preset distance between the first passage opening 111 and the valve port 32. Further, the outer wall of the valve seat assembly 30 is in interference fit with the inner wall of the housing 10 to limit the radial position of the valve seat assembly 30, so that the position of the valve core assembly 20 is well limited, and sealing between the valve seat assembly 30 and the housing 10 is facilitated.

Based on this, in the present embodiment, there is a gap between the connection seat 61 and the valve seat assembly 30 in the height direction of the injector 100; the second passage 12 has a second passage opening 121 facing the mounting chamber 101, and the opening of the second passage opening 121 is located between the connection seat 61 and the valve seat assembly 30 in the height direction of the injector 100. The mouth where each mouth is located herein includes the mouth and the wall defining the mouth. By the above arrangement, the working fluid flowing in from the second port 121 can directly enter the receiving chamber 31 of the valve seat assembly 30 through the mounting chamber 101, and the pressure loss of the working fluid can be reduced.

As for the valve seat assembly 20, as shown in fig. 15 and 16, in another embodiment, a part of the valve seat assembly 30 is located in the installation cavity 101, and another part of the valve seat assembly 30 is sleeved on the inner surface side of the connection seat 61, specifically, in the height direction and the axial direction of the valve core assembly 20, a gap is provided between the valve seat assembly 30 and the connection seat 61, and a screw connection is possible between the connection seat 61 and the housing 10 to compress the sealing member 40. By the above arrangement, the position of the valve seat assembly 30 can be kept unaffected by the compression of the seal 40 by the connection seat 61. Further, the valve seat assembly 30 further has the communication passage 34, the mounting chamber 101 can communicate with the valve port 32 through the communication passage 34, at this time, the working fluid flowing in from the third passage port 131 enters the accommodation chamber 31 of the valve seat assembly 30 through the mounting chamber 101, the communication passage 34, and in this embodiment, since another part of the valve seat assembly 30 is fitted over the inner surface side of the connection seat 61 and may have a gap with the nut assembly 53, at this time, an interference fit may be made between the outer wall of the other part of the valve seat assembly 30 located in the mounting chamber 101 and the inner wall of the housing 10. In this embodiment, the structures of the connection seat 61, the sealing member 40, the housing 10, the control assembly 50, and the valve cartridge assembly 20 are similar to those shown in fig. 1 to 14, and will not be repeated.

Referring further to fig. 1-16, in some embodiments, the injector 100 further includes a seal ring 62, the seal ring 62 being located between the housing 10 and the valve seat assembly 30, and the seal ring 62 being located between a channel portion of the third channel port 131 facing the mounting chamber 101 and a port portion where the valve port 32 is located, in a height direction of the injector 100. By the above arrangement, the injector 100 can be provided with a good seal. Alternatively, the seal ring may be an O-ring seal.

With further reference to fig. 6, 8 and 9, in some embodiments, the valve seat assembly 30 includes a valve seat 35, a guide 36, and a gasket 37, the guide 36 is positioned within the valve seat 35, the valve port 32 is positioned within the valve seat 35, and the valve stem 22 of the valve cartridge assembly 20 is slidably engaged with the guide 36 to prevent radial misalignment of the valve cartridge assembly 20 along the valve seat assembly 30, thereby facilitating the assurance of coaxiality of the valve cartridge 21 and the valve port 32. The valve seat 35 of the valve seat assembly 30 includes a tapered portion 351, the valve port 32 is located at an end of the tapered portion 351, and the third passage 131 is provided at least opposite the tapered portion 351 in the axial direction (height direction) of the injector 100. The axial direction of the injector 100, the height direction of the injector 100, as described herein, are parallel or coincident, both referring to the axial direction of the valve core assembly 20.

Referring to fig. 5 to 8, the guide member 36 of the injector 100 is fixedly connected or limitedly connected with the valve seat assembly 30, the guide member 36 has a guide hole 361, a portion of the valve rod 22 is located in the guide hole 361, the guide hole 361 penetrates through the guide member 36 along the axial direction of the guide member 36, and the valve rod 22 is slidably matched with the wall forming the guide hole 361, so that the positioning of the valve core 21 is facilitated, the situation that the valve core 21 is not coaxial with the valve port 32 is reduced, or the swing range of the valve core 21 in the radial direction is reduced, the collision between the valve core 21 and the wall forming the valve port 32 is reduced, and particularly, the internal leakage is also facilitated to be reduced during valve closing.

Further, the guide 36 includes a resilient portion 362 and a body 363, with a portion of the valve stem 22 being located within the body 363, radially of the valve seat assembly 30, with the resilient portion 362 being located between the body 363 and the valve seat 35, and specifically, the resilient portion 362 being circumferentially distributed along the body 363, where the circumferential distribution includes a continuous circumferential distribution, as well as a discrete circumferential distribution. This allows the stem 22 to allow some radial deflection during operation due to the presence of the resilient portion 362, preventing the cartridge assembly 20 from seizing during operation. In the embodiment, the elastic portions 362 are distributed along the circumferential direction of the guide 36, the radial offset of the valve core assembly 20 can be any angle, and the elastic portions 362 can be made of polytetrafluoroethylene or polyetheretherketone or polyamide 66 or nylon 66 or polyphenylene sulfide.

In yet another aspect, embodiments of the present invention also provide a manufacturing method of an injector, by which the injector 100 in any of the embodiments of fig. 1 to 16 can be manufactured. Referring to fig. 1 to 17, a method for manufacturing an injector according to an embodiment of the present invention includes:

s110, at least part of the valve seat assembly 30 is disposed in the mounting chamber 101 of the housing 10.

Specifically, as shown in fig. 1 to 14, the seal ring 62 may be fitted to a part of the outer peripheral side of the valve seat assembly 30, and then the valve seat assembly 30 and the seal ring 62 may be integrally mounted to the mounting cavity 101 of the housing 10, when the fitting portion 33 of the valve seat assembly 30 abuts against the stopper portion 15 of the housing 10, the valve seat assembly 30 may be mounted in place, and at least part of the outer wall of the fitting portion 33 of the valve seat assembly at this time may be interference-fitted with the inner wall of the housing 10 to limit the radial position of the valve seat assembly 30. The valve core assembly 20 may be disposed within the valve seat assembly 30 prior to installation of the valve seat assembly 30, or the valve core assembly 20 may be installed within the valve seat assembly 30 after the valve seat assembly 30 is in place. The valve stem 22 and the valve core 21 are integrally formed.

And S120, at least part of the connecting seat 61 is installed on the shell 10, and a gap is formed between the connecting seat 61 and the valve seat assembly 30 so as to maintain the position of the valve seat assembly 30.

In some embodiments, moving the connection seat 61 closer to the housing 10 in the height direction of the housing 10 to clamp the sealing member 40, in particular, the housing 10 may include a first screw portion, the connection seat 61 may include a second screw portion, and connecting the connection seat 61 with the housing 10 in the height direction of the injector 100 to clamp the sealing member 40 includes: the connecting seat 61 is screwed with the housing 10 and clamps the sealing member 40. The sealing member 40 is disposed in compression with the coupling seat 61 and the housing 10 in the height direction of the injector 100, wherein a gap is provided between the valve seat assembly 30 and the coupling seat 61. Alternatively, the control assembly 50 may push the connecting seat 61 to clamp the sealing member 40 during the process of fastening the control assembly 50 to the housing 10 by the fastening member 57. The height direction of the housing 10 herein is parallel or coincident with the height direction of the injector 100.

According to the manufacturing method of the injector provided by the embodiment of the invention, the connecting seat 61 is relatively close to the shell 10 along the height direction of the shell 10 so as to clamp the sealing element 40, and a gap is formed between the connecting seat 61 and the valve seat assembly 30 so as to keep the position of the valve seat assembly 30, so that the connecting seat 61 can reduce the influence of the connecting seat 61 on the valve seat assembly 30 in the process of compressing the sealing element 40 in the process of moving close to the shell so as to ensure that the position of the valve port 32 meets the requirement.

It should be noted that: the above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, for example, the definitions of "front", "rear", "left", "right", "upper", "lower", etc., and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application may be modified or substituted by the same, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the scope of the claims of the present application.

Claims (13)

1. Injector (100) characterized in that the injector (100) has a mounting cavity (101), the injector (100) comprises a housing (10), a connecting seat (61), a valve seat assembly (30) and a valve core assembly (20), the housing (10) and the connecting seat (61) are connected and each form part of a wall part of the mounting cavity (101), at least part of the valve seat assembly (30) is positioned in the mounting cavity (101), the valve seat assembly (30) has a valve port (32), the valve core assembly (20) comprises a valve core (21), and the valve core (21) can move towards or away from the valve port (32);

wherein a gap is provided between the valve seat assembly (30) and the connection seat (61).

2. The injector (100) according to claim 1, wherein the housing (10) has a first channel (11), a second channel (12) and a third channel (13), the second channel (12) being communicable with the first channel (11) through the valve port (32), the mounting cavity (101), the third channel (13) being communicable with the first channel (11) through the mounting cavity (101);

the first passage (11) has a first passage opening (111) facing the valve port (32), and a predetermined distance is provided between the first passage opening (111) and the valve port (32) in the height direction of the injector (100).

3. The injector (100) according to claim 2, wherein the housing (10) comprises a first wall portion (14), the first wall portion (14) forming part of the wall portion of the mounting cavity (101), the first wall portion (14) decreasing in cross-sectional dimension in a direction in which the valve port (32) is directed towards the first passage opening (111);

the third channel (13) has a third channel opening (131) towards the mounting cavity (101), the third channel opening (131) being located at the first wall portion (14).

4. The injector (100) according to claim 2, wherein the valve seat assembly (30) is located in the installation cavity (101), the valve seat assembly (30) is arranged at intervals from the connecting seat (61) along the height direction of the injector (100), the housing (10) comprises a limiting portion (15), the valve seat assembly (30) comprises a matching portion (33), the limiting portion (15) is arranged in a limiting manner with the matching portion (33), and the outer wall of the valve seat assembly (30) is in interference fit with the inner wall of the housing (10).

5. The injector (100) of claim 4, wherein the connection seat (61) is spaced apart from the valve seat assembly (30) along a height direction of the injector (100);

the second channel (12) is provided with a second channel opening (121) facing the mounting cavity (101), and the opening where the second channel opening (121) is positioned between the connecting seat (61) and the valve seat assembly (30) along the height direction of the ejector (100).

6. The injector (100) according to claim 2, wherein a part of the valve seat assembly (30) is located in the mounting chamber (101), another part of the valve seat assembly (30) is sleeved on the inner surface side of the connecting seat (61), and a gap is formed between the valve seat assembly (30) and the connecting seat (61) in the height direction of the injector (100) and the radial direction of the injector (100);

the valve seat assembly (30) further has a communication passage (34), and the mounting chamber (101) can communicate with the valve port (32) through the communication passage (34).

7. The injector (100) according to any one of claims 2 to 6, wherein the injector (100) further comprises a sealing ring (62), the sealing ring (62) being located between the housing (10) and the valve seat assembly (30), the sealing ring (62) being located between a channel portion of the second channel (12) facing the mounting chamber (101) and a mouth portion where the valve port (32) is located, in a height direction of the injector (100).

8. The injector (100) according to any one of claims 1 to 6, wherein the injector (100) further comprises a seal (40), the seal (40) being arranged in compression between the connection seat (61) and the housing (10) in the height direction of the injector (100);

the seal (40) comprises a first portion (41), a second portion (42) and a connecting portion (43), the connecting portion (43) being connected between the first portion (41) and the second portion (42) in a radial direction of the seal (40), an extending direction of the first portion (41) intersecting an extending direction of the connecting portion (43), an extending direction of the second portion (42) intersecting an extending direction of the connecting portion (43);

the shell (10) comprises a first threaded portion, the connecting seat (61) comprises a second threaded portion, the first threaded portion is matched with the second threaded portion, and the sealing piece (40) is clamped between the connecting seat (61) and the shell (10) under the action of threads.

9. The injector (100) of any one of claims 1 to 6, wherein the injector (100) further comprises a rotor assembly (55), at least a portion of the rotor assembly (55) being located on a side of the connection seat (61) facing away from the valve seat assembly (30), the connection seat (61) having a mounting aperture (611), the valve core assembly (20) further comprising a valve stem (22), the valve stem (22) being of unitary construction with the valve core (21), a portion of the valve stem (22) being located within the mounting aperture (611), another portion of the valve stem (22) being connected to the rotor assembly (55).

10. The injector (100) of claim 9, wherein the valve stem (22) includes a first stop (221) and a second stop (224), the first stop (221) and the second stop (224) being spaced apart along an axial direction of the valve stem (22);

the injector (100) further comprises a nut component (53), the nut component (53) is located on one side, deviating from the valve seat component (30), of the connecting seat (61), the nut component (53) is in limiting arrangement with the connecting seat (61), the first limiting part (221) is located on the inner peripheral side of the nut component (53), the first limiting part (221) is in clearance fit with the nut component (53), and the second limiting part (224) is in clearance fit with the connecting seat (61).

11. The injector (100) of claim 10, wherein the valve stem (22) further includes a threaded portion (222), the threaded portion (222) being located between the first and second stop portions (221, 224) along an axial direction of the valve stem (22), the threaded portion (222) being threadedly engaged with the nut assembly (53);

the valve core assembly (20) further comprises a flange portion (223), the flange portion (223) and the valve rod (22) are integrally structured or arranged in a limiting mode, the flange portion (223) is located on one side, away from the valve seat assembly (30), of the connecting seat (61), at least part of the radial dimension of the flange portion (223) is larger than that of an opening, facing the flange portion (223), of the mounting hole channel (611), and the flange portion (223) can be abutted to one of the connecting seat (61) and the nut assembly (53).

12. A thermal management system (1), characterized in that the thermal management system (1) comprises a compressor (200), a condenser (300), a first evaporator (600), a second evaporator (400), a throttling element, a gas-liquid separator (500) and an ejector (100) according to any of claims 1 to 11, the compressor (200) being in communication with a first inlet of the ejector (100) through the condenser (300), an outlet of the ejector (100) being in communication with a first interface (501) of the gas-liquid separator (500) through the second evaporator (400), a second interface (502) of the gas-liquid separator (500) being in communication with an inlet of the compressor (200), a third interface (503) of the gas-liquid separator (500) being in communication with an inlet of the first evaporator (600) through the throttling element, an outlet of the first evaporator (600) being in communication with a second inlet of the ejector (100).

13. A method of manufacturing an injector, comprising:

disposing at least a portion of the valve seat assembly (30) within a mounting cavity (101) of the housing (10);

at least part of the connecting seat (61) is mounted on the shell (10) and a gap is formed between the connecting seat (61) and the valve seat assembly (30).