CN115112287A - Water pressure sensing device with freezing protection function for automobile - Google Patents
Water pressure sensing device with freezing protection function for automobile Download PDFInfo
- Publication number
- CN115112287A CN115112287A CN202210797517.2A CN202210797517A CN115112287A CN 115112287 A CN115112287 A CN 115112287A CN 202210797517 A CN202210797517 A CN 202210797517A CN 115112287 A CN115112287 A CN 115112287A
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- Prior art keywords
- pressure sensing
- hole
- sensing device
- wall
- automobile
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000007710 freezing Methods 0.000 title claims abstract description 13
- 230000008014 freezing Effects 0.000 title claims abstract description 12
- 230000006698 induction Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
Abstract
The invention discloses an automobile water pressure sensing device with freezing protection, which comprises a shell and a pressure sensing element, wherein the upper part of the shell is provided with a containing cavity matched with and provided with the pressure sensing element, a water storage space is reserved between the pressure sensing element and the inner bottom of the containing cavity, the lower part of the shell is provided with a column tube communicated with the containing cavity through an inner hole, the inner hole of the column tube is respectively an upper hole, a middle hole and a lower hole from top to bottom, the upper hole is correspondingly communicated with the water storage space, the inner diameter of the lower hole is larger than that of the middle hole, and the wall thickness of the middle wall of the middle hole is smaller than or equal to that of the lower wall of the lower hole. The water pressure sensing device with freezing protection for the automobile is simple in structure and low in cost, effectively solves the problem that water is damaged due to volume increase when being frozen, and improves reliability and service life.
Description
Technical Field
The invention relates to the technical field of water pressure sensing devices, in particular to a water pressure sensing device with freezing protection for an automobile.
Background
At present, a water pressure sensor is widely applied to the automobile industry, changes of water pressure are monitored in real time and converted into electric signals to be fed back to an ECU of a whole automobile, the volume of water frozen at a low temperature can be increased, the volume of water of unit weight is increased by about 10% after being frozen, extra pressure can be correspondingly generated on a water storage device and test equipment, and even the risk of damaging the sensor occurs, so that the whole system fails, the water pressure sensor is prevented from being damaged due to water freezing, the water pressure sensor is prevented from failing due to damage, some existing anti-freezing technologies are additionally provided with auxiliary protection systems, such as temperature monitoring, heating and heat preservation and other mechanisms, the cost of the whole system can be obviously increased, and the whole system is more complex.
Disclosure of Invention
The purpose of the invention is: the water pressure sensing device for the automobile does not need to additionally increase temperature control, is low in cost and has freezing protection.
The utility model provides a water pressure sensing device for car with freeze protection, includes casing, forced induction component, the upper portion of casing is provided with the matching installation forced induction component holds the chamber, forced induction component and holding leave the water storage space between the chamber insole, the lower part of casing is provided with through the hole intercommunication the pillar pipe that holds the chamber, the hole of pillar pipe is from top to bottom respectively for last hole, mesopore and lower hole, it corresponds the intercommunication to go up the hole the water storage space, the internal diameter of lower hole is greater than the internal diameter of mesopore, the wall thickness of mesopore midwall is less than or equal to the wall thickness of the lower wall of lower hole.
As a preferable scheme of the present invention, the middle portion of the pressure sensing element is an elastic membrane, the upper wall of the column tube at the upper hole position extends into the cavity, and the longitudinal section of the water storage space is in an inverted U shape.
As a preferable scheme of the present invention, the peripheral wall of the pressure sensing element is in threaded connection with the inner side wall of the cavity, and a sealing ring is arranged between the bottom side of the pressure sensing element and the inner bottom of the cavity.
As a preferable scheme of the present invention, an opening of the cavity is covered with a connector assembly, and a circuit board is further disposed above the pressure sensing element in the cavity, and the circuit board is connected to the connector assembly through a signal wire harness.
As a preferable scheme of the present invention, the joint assembly is tightly connected to the housing through a matching nut, the nut is in threaded connection with an outer wall of the housing, and an O-ring is disposed between the outer wall of the joint assembly and the housing.
As a preferable aspect of the present invention, the lower hole has an inner diameter at least twice as large as that of the middle hole, and the middle wall and the lower wall have the same wall thickness.
Compared with the prior art, the water pressure sensing device with freezing protection for the automobile has the advantages that: simple structure and with low costs effectively solve the problem that water damages because the volume increases when freezing, has improved reliability and life.
Drawings
FIG. 1 is a cross-sectional view of an assembled structure in accordance with one embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be further understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the machine or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, a water pressure sensing device for an automobile with freeze protection according to a preferred embodiment of the present invention includes a housing 1 and a pressure sensing element 3, wherein a cavity 11 for installing the pressure sensing element 3 in a matching manner is provided at an upper portion of the housing 1, a water storage space 111 is left between the pressure sensing element 3 and an inner bottom of the cavity 11, a column tube 12 communicated with the cavity 11 through an inner hole is provided at a lower portion of the housing 1, the inner hole of the column tube 12 is an upper hole 121, a middle hole 122 and a lower hole 123 from top to bottom, respectively, the upper hole 121 is correspondingly communicated with the water storage space 111, the inner diameter of the lower hole 123 is larger than the inner diameter of the middle hole 122, the wall thickness of a middle wall 125 of the column tube 12 at the position of the middle hole 122 is smaller than or equal to the wall thickness of a lower wall 126 at the position of the lower hole 123, the water pressure sensing device is provided in the cavity 11 through the housing 1, the column pipe 12 is connected with a water storage device or a container, water finally enters the water storage space 111 through the lower hole 123, the middle hole 122 and the upper hole 121, so that the water pressure is detected by the pressure sensing element 3, through the wall thickness design of the middle wall 125 and the lower wall 126, the middle wall 125 and the lower wall 126 have the same thermal conductivity and heat dissipation rate, or the thermal conductivity and heat dissipation rate of the middle wall 125 are higher than those of the lower wall 126, and then the inner diameter difference of the two sections of inner holes is matched, less water stored in the middle hole 122 than the lower hole 123 is firstly solidified when the ambient temperature reaches the solidification point, for example, when the temperature is 0 ℃ under the normal pressure environment, the middle hole 122 is blocked, and the water in the lower hole 123 and communicated with the water body cannot pass through the middle hole 122 even if the volume is increased due to solidification, so that the water pressure in the water storage device is prevented from suddenly increasing and then passing through the upper hole 121 to damage the pressure sensing element 3, and the problem that the water pressure sensing device fails or even is scrapped when the water is effectively solved, good protection is formed, the structure is simple and efficient, no additional part is needed, and the cost is low.
Referring to fig. 1, for example, the elastic diaphragm 31 is disposed in the middle of the pressure sensing element 3, the elastic diaphragm 31 may be a resistive diaphragm, a capacitive diaphragm, or a magnetic diaphragm, the upper wall 124 of the column tube 12 at the position of the upper hole 121 extends into the cavity 11, and the longitudinal section of the water storage space 111 is in an inverted U shape, so that the water pressure formed by the water stored in the water storage space 111 to the pressure sensing element 3 is more uniform, and thus the water pressure detected by the elastic diaphragm 31 is more accurate, and meanwhile, the wall thickness structure of the upper wall 124 is more complex, so that the water stored in the upper hole 121 is not solidified before the water stored in the middle hole 122.
Referring to fig. 1, for example, the peripheral wall of the pressure sensing element 3 is in threaded connection with the inner side wall of the cavity 11, and a sealing ring 2 is arranged between the bottom side of the pressure sensing element 3 and the inner bottom of the cavity 11, so that the assembly is facilitated, and the sealing property in the water storage space 111 is ensured.
Referring to fig. 1, exemplarily, a connector assembly 4 is installed on an opening of the cavity 11 in a covering manner, a circuit board 5 is further disposed above the pressure sensing element 3 in the cavity 11, the circuit board 5 is connected to the connector assembly 4 through a signal wire harness, the circuit board 5 correspondingly converts a water pressure value detected by the pressure sensing element 3 into an electric signal, and the electric signal is transmitted through the connector assembly 4 through the signal wire harness, so that the sensing device is integrated on the housing 1 into a whole module structure, and the sensing device is compact in structure, easy to assemble and very convenient to apply.
Referring to fig. 1, exemplarily, the joint assembly 4 is fastened and connected with the housing 1 through a matching nut 6, the nut 6 is in threaded connection with the outer wall of the housing 1, an O-ring 7 is arranged between the outer wall of the joint assembly 4 and the housing 1, the nut 6 gives way to the joint assembly 4 through a middle through hole, the joint assembly can be correspondingly buckled on the housing 1 as long as the rotation is in place, and the sealing is well realized, so that the cavity 11 is ensured to be waterproof and dustproof.
Referring to fig. 1, for example, the inner diameter of the lower hole 123 is at least twice the inner diameter of the middle hole 122, the middle wall 125 and the lower wall 126 have the same wall thickness, so that the two pipe walls have the same thermal conductivity and heat dissipation rate, and the inner diameters of the two inner holes are at least twice different, so that not only is it ensured that half or more of the water stored in the middle hole 122 than the lower hole 123 will be solidified first when the ambient temperature reaches the solidification point, but also the structural strength and the processing consistency of the pillar pipe 12 are maintained.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. A water pressure sensing device with freezing protection for an automobile is characterized in that: including casing, forced induction component, the upper portion of casing is provided with the matching installation forced induction component holds the chamber, forced induction component and holding leave the water storage space between the intracavity bottom, the lower part of casing is provided with through the hole intercommunication the pillar pipe that holds the chamber, the hole of pillar pipe is from top to bottom respectively for last hole, mesopore and lower hole, the last hole corresponds the intercommunication the water storage space, the internal diameter in lower hole is greater than the mesoporous internal diameter, the wall thickness of mesoporous midwall is less than or equal to the wall thickness of the lower wall in lower hole.
2. The water pressure sensing device for the automobile with the freezing protection as claimed in claim 1, wherein: the middle part of the pressure sensing element is an elastic membrane, the upper wall of the column tube at the upper hole position extends into the containing cavity, and the longitudinal section of the water storage space is in an inverted U shape.
3. The water pressure sensing device for an automobile having freeze protection according to claim 1 or 2, wherein: the peripheral wall of the pressure sensing element is in threaded connection with the inner side wall of the containing cavity, and a sealing ring is arranged between the bottom side of the pressure sensing element and the inner bottom of the containing cavity.
4. The water pressure sensing device for an automobile having freeze protection according to claim 1 or 2, wherein: the pressure sensing device is characterized in that a connector assembly is mounted on an opening of the accommodating cavity in a covering mode, a circuit board is further arranged above the pressure sensing element in the accommodating cavity, and the circuit board is connected with the connector assembly through a signal wire harness.
5. The water pressure sensing device for the automobile with the freezing protection as claimed in claim 4, wherein: the connector assembly is fixedly connected with the shell through a matched nut, the nut is in threaded connection with the outer wall of the shell, and an O-shaped ring is arranged between the outer wall of the connector assembly and the shell.
6. The water pressure sensing device for an automobile having freeze protection according to claim 1 or 2, wherein: the lower bore has an inner diameter at least twice the inner diameter of the central bore, and the middle and lower walls have the same wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210797517.2A CN115112287A (en) | 2022-07-07 | 2022-07-07 | Water pressure sensing device with freezing protection function for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210797517.2A CN115112287A (en) | 2022-07-07 | 2022-07-07 | Water pressure sensing device with freezing protection function for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115112287A true CN115112287A (en) | 2022-09-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210797517.2A Pending CN115112287A (en) | 2022-07-07 | 2022-07-07 | Water pressure sensing device with freezing protection function for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115112287A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023066A (en) * | 2010-05-31 | 2011-04-20 | 昆山双桥传感器测控技术有限公司 | Universal pressure sensor of automobile |
| CN202661223U (en) * | 2012-07-27 | 2013-01-09 | 大庆明昊源石油科技开发有限公司 | Three-prevention set pressure gauge for oil-water well |
| CN203231860U (en) * | 2012-11-26 | 2013-10-09 | 森萨塔科技（常州）有限公司 | Urea pressure sensor device for motor vehicle |
| US20140345389A1 (en) * | 2013-05-24 | 2014-11-27 | Yong C. Kim | Sensor water freeze protector |
| CN104502018A (en) * | 2014-12-27 | 2015-04-08 | 东莞品派实业投资有限公司 | Anti-freezing pressure gauge |
| CN107505081A (en) * | 2017-08-21 | 2017-12-22 | 北京精密机电控制设备研究所 | A kind of small-sized silicon on sapphire differential pressure pickup |
| CN107543644A (en) * | 2017-10-17 | 2018-01-05 | 雷念程 | Quick response diaphragm pressure sensor and its manufacture method |
| CN207114088U (en) * | 2017-07-07 | 2018-03-16 | 西安秦泰汽车排放技术有限公司 | A kind of anti-cold pressure sensor for freezing ice damage |
| CN209356116U (en) * | 2019-01-29 | 2019-09-06 | 上海海华传感器有限公司 | A kind of urea pressure sensor |
| CN210893491U (en) * | 2019-11-25 | 2020-06-30 | 松诺盟科技有限公司 | Flexible connection pressure sensor |
| CN113008535A (en) * | 2021-02-08 | 2021-06-22 | 东风柳州汽车有限公司 | Testing method and testing device for expansion water tank |
| CN215065001U (en) * | 2021-05-14 | 2021-12-07 | 江门市锐驱电子科技有限公司 | Frost crack prevention pressure sensor |
-
2022
- 2022-07-07 CN CN202210797517.2A patent/CN115112287A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023066A (en) * | 2010-05-31 | 2011-04-20 | 昆山双桥传感器测控技术有限公司 | Universal pressure sensor of automobile |
| CN202661223U (en) * | 2012-07-27 | 2013-01-09 | 大庆明昊源石油科技开发有限公司 | Three-prevention set pressure gauge for oil-water well |
| CN203231860U (en) * | 2012-11-26 | 2013-10-09 | 森萨塔科技（常州）有限公司 | Urea pressure sensor device for motor vehicle |
| US20140345389A1 (en) * | 2013-05-24 | 2014-11-27 | Yong C. Kim | Sensor water freeze protector |
| CN104502018A (en) * | 2014-12-27 | 2015-04-08 | 东莞品派实业投资有限公司 | Anti-freezing pressure gauge |
| CN207114088U (en) * | 2017-07-07 | 2018-03-16 | 西安秦泰汽车排放技术有限公司 | A kind of anti-cold pressure sensor for freezing ice damage |
| CN107505081A (en) * | 2017-08-21 | 2017-12-22 | 北京精密机电控制设备研究所 | A kind of small-sized silicon on sapphire differential pressure pickup |
| CN107543644A (en) * | 2017-10-17 | 2018-01-05 | 雷念程 | Quick response diaphragm pressure sensor and its manufacture method |
| CN209356116U (en) * | 2019-01-29 | 2019-09-06 | 上海海华传感器有限公司 | A kind of urea pressure sensor |
| CN210893491U (en) * | 2019-11-25 | 2020-06-30 | 松诺盟科技有限公司 | Flexible connection pressure sensor |
| CN113008535A (en) * | 2021-02-08 | 2021-06-22 | 东风柳州汽车有限公司 | Testing method and testing device for expansion water tank |
| CN215065001U (en) * | 2021-05-14 | 2021-12-07 | 江门市锐驱电子科技有限公司 | Frost crack prevention pressure sensor |
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