Patent Grant
11339889
This application claims the benefit of the filing date under 35 U.S.C. § 119(a)-(d) of Chinese Patent Application No. 201921327748.7, filed on Aug. 15, 2019.
The present disclosure relates to a solenoid valve, a fixing assembly for installing a sensor, and a sensor assembly.
Urea for vehicles, for example, AdBlue, is a liquid used in selective catalytic reduction (“SCR”) technology to reduce nitrogen oxide pollution in diesel exhaust. The quality of urea and the performance index during the use are related to the quality of exhaust gas. Therefore, vehicles are usually equipped with sensors for monitoring the status of urea, such as sensors for monitoring urea concentration, temperature, and liquid level, respectively.
During the use of the urea sensor, it is necessary to use a temperature-regulating liquid such as antifreeze or water to adjust its temperature, so as to avoid too high or too low temperature affecting the normal operation of the sensor. The supply of temperature-regulating liquid is controlled by a solenoid valve.
In one of the technical solutions, the solenoid valve and a sensor assembly are integrated into a non-detachable device. The production and installation of the non-detachable device, however, is inconvenient. Further, when some parts are damaged, the fault location cannot be accurately checked, leading to difficult maintenance, the need to replace the device as a whole, and increased costs. These disadvantages make the sensor assembly difficult to use.
A solenoid valve includes a valve body having a valve cavity, a first delivery tube having a first tube cavity, a second delivery tube having a second tube cavity, and an electromagnetic member connected to the valve body. The first delivery tube is connected to the valve body at one end and the first tube cavity is in communication with the valve cavity. The second delivery tube is connected to the valve body at one end and the second tube cavity is in communication with the valve cavity. At least one of the first delivery tube and the second delivery tube is a bent tube. The electromagnetic member is configured to control communication and disconnection of the first delivery tube and/or the second delivery tube with the valve cavity.
The invention will now be described by way of example with reference to the accompanying Figures, of which:
Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein like reference numerals refer to like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will convey the concept of the disclosure to those skilled in the art.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
As shown in
As shown in
One of the first delivery tube 212 and the second delivery tube 213 acts as an input tube to input fluid into the valve cavity 216 shown in
The valve body 211 is further provided with a positioning block 217, as shown in
The electromagnetic member 221, as shown in
The electromagnetic member 221 is arranged on a bracket 222, as shown in
As shown in
The upper housing 132 is provided with a first through hole 134 that penetrates the upper housing 132 to connect the cavity 131 with the outside, as shown in
A second sealing member 138, as shown in
As shown in
As shown in
The snap protrusions 1382 are embedded in the second through hole 136 to fix the annular body 1381 at a desired position in the first through hole 134. The snap protrusion 1382 can be pushed through the groove 137 to exit the second through hole 136, so as to disassemble the second sealing member 138. The second through hole 136 is only used as an example of the receiving structure, and may also be replaced by a groove, a receiving slot, or a blind hole.
The lower housing 133 is provided with a connecting structure configured to be connected to the solenoid valve 210 so that the solenoid valve 210 and the lower housing 133 are integrally connected together. In this embodiment as shown in
The fluid delivery line 141 is used to deliver a temperature-regulating fluid, such as water or antifreeze. One end 142 of the fluid delivery line 141 passes through the lower housing 133 and the cavity 131 and extends out from the first through hole 134 of the upper housing 132, as shown in
An adapter tube 144 is connected to the end 142 of the fluid delivery line 141, as shown in
As shown in
The solenoid valve 210 is arranged on the support platform 140, and the positioning block 217 is partially embedded in the receiving slot 149, as shown in
The type of the sensor in the present disclosure may be determined according to the needs of actual use. For example, when it serves as a vehicle urea quality sensor, a urea concentration sensor 191 and a liquid level sensor 192 may be used. A temperature sensor (not shown in the figure) may also be provided at a suitable position. A signal processing circuit is provided in the cavity 131 to process the electrical signal delivered by the sensor and transmit it to the outside, or directly transmit the electrical signal without processing. The signal processing circuit may be set according to actual needs. For example, it may be set as a printed circuit board 194 electrically connected to other components using wires 195 and connectors 196, as shown in
According to the solenoid valve 210, the fixing assembly 110 for installing a sensor, and the sensor assembly 100 described in the present disclosure, the solenoid valve 210 and the fixing assembly 110 are sleeved and detachably connected with a third tube cavity of the fluid delivery line 141 through the first delivery tube 212 or the second delivery tube 213. Thereby, the production and installation are convenient, the fault location can be accurately checked, the replacement and maintenance are convenient, and the use is also convenient.
The housing 130 is provided with the support platform 140, which may conveniently connect and assemble the solenoid valve 210 and the housing 130. The adapter tube 144 is provided on the fluid delivery line 141 to facilitate the sleeving and connection of the fluid delivery line 141 to the first delivery tube 212 or the second delivery tube 213, so as to avoid that too large difference in their diameters otherwise causes installation failure. The first sealing member 145 and the second sealing member 138 are provided to seal the gap between the first delivery tube 212 or the second delivery tube 213 and the fluid delivery line 141 and the housing 130, so as to prevent leakage and prevent the devices in the cavity 131 in the housing 130 from being affected by moisture.
The second sealing member 138 is annular and is provided with a protrusion 1382 for latching, which is convenient for installation and disassembly. The first through hole 134 is provided with a section of suspended tube wall 135, which is convenient to provide a receiving structure for embedding the second sealing member 138. The outer surface of the suspended hole wall 135 is provided with a groove 137, which may be convenient for pushing the protrusion 1382 to disassemble the second sealing member 138. The first delivery tube 212 or the second delivery tube 213 at the connection adopts a bent tube, which is convenient for connecting and assembling with the fluid delivery line 141 on the fixing assembly 110 for installing the sensor. The support platform 140 is provided with a receiving groove 149 to receive a part of the positioning block 217, which may ensure the stability of the valve body 211 during use and the safety of use.
The above are only embodiments of the present disclosure and are not intended to limit the scope of protection of the present disclosure. Any modifications, equivalent substitutions or improvements made within the spirit of the present disclosure are covered by the scope of the claims of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201921327748.7 | Aug 2019 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 7204273 | Zub | Apr 2007 | B1 |
| 11215097 | Schmidt | Jan 2022 | B2 |
| 20200263579 | Iida | Aug 2020 | A1 |
| 20200370457 | Fellman | Nov 2020 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20210048115 A1 | Feb 2021 | US |
