Anti-icing DPF differential pressure sensor structure
By designing drainage structures with first and third ramps in the DPF differential pressure sensor, the problem of condensate freezing and clogging inside the sensor was solved, achieving automatic drainage and ensuring the normal operation of the sensor.
Patent Information
- Application Number
- CN202520356293.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing DPF differential pressure sensors cannot achieve fully automatic drainage at both the high-pressure and low-pressure ends, causing condensate to freeze and clog the sensor, affecting normal operation.
An anti-icing DPF differential pressure sensor structure was designed, which adopts a drainage design with a first and third ramp, combined with a high-pressure interface and a low-pressure interface, to achieve automatic drainage and prevent condensate from staying in the housing for a long time.
This allows for the rapid drainage of condensate, preventing ice buildup and blockage within the sensor cavity and ensuring the sensor's stable and normal operation.
Smart Images
Figure CN223710899U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to differential pressure sensor technical field especially relates to a kind of DPF differential pressure sensor structure of anti-icing. BACKGROUND
[0002] DPF differential pressure sensor is mainly applied to monitor and measure the differential pressure change inside automobile diesel particulate filter (DPF), to ensure the efficient operation of DPF, and is an important sensor on automobile.
[0003] In the working process of DPF differential pressure sensor, the gas pipeline connected therewith also enters water vapor into the inside of differential pressure sensor when making exhaust gas into differential pressure sensor, and the water in the inside of differential pressure sensor needs to be discharged quickly to avoid unable to work normally when condensing.
[0004] The existing differential pressure sensor mainly realizes drainage through the design of structure, but the structure is relatively single, and the high-pressure and low-pressure ends cannot realize complete automatic drainage. Water vapor in exhaust gas is liquefied when meeting low-temperature pipe wall, and part of water accumulates in the cavity of differential pressure sensor and cannot be discharged in time. When the vehicle stops, if the outside temperature is low, the condensed water in the cavity of differential pressure sensor will freeze, the inside of sensor is blocked by ice, and the vehicle cannot normally sense pressure when starting again. UTILITY MODEL CONTENTS
[0005] The utility model aims at solving the technical problem that high-pressure and low-pressure ends cannot realize complete automatic drainage in prior art, and provides a kind of DPF differential pressure sensor structure of anti-icing.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0007] A kind of DPF differential pressure sensor structure of anti-icing, including shell and pressure sensing module, the pressure sensing module is fixedly installed in shell, both sides of the pressure sensing module are equipped with high-pressure area and low-pressure area;The bottom of the high-pressure area is equipped with first slope, and the bottom of the low-pressure area is equipped with third slope.
[0008] Preferably, the bottom of the shell is connected with high-pressure interface and low-pressure interface;The high-pressure interface is connected with the lowest part of first slope;The low-pressure interface is connected with the lowest part of third slope.
[0009] Preferably, the side wall of the high-pressure area close to high-pressure interface is equipped with second slope.
[0010] Preferably, the shell is fixedly connected with front cover on the side close to high-pressure area, and is fixedly connected with rear cover on the side close to low-pressure area.
[0011] Preferably, the pressure sensing module is fixedly connected in the shell through a pressing plate; the pressing plate is located on one side of the high-pressure area.
[0012] Preferably, one end of the shell is provided with a socket.
[0013] Preferably, the shell is further provided with a mounting hole.
[0014] Compared with the prior art, the DPF differential pressure sensor structure provided by the utility model has the following beneficial effects:
[0015] The DPF differential pressure sensor structure can quickly drain condensed water, realize automatic drainage, avoid long-time stay in the shell, and further avoid the problems of freezing and blockage in the inner cavity and normal pressure sensing. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 Structure diagram of the DPF differential pressure sensor structure Figure 1 ;
[0017] Figure 2 Structure diagram of the DPF differential pressure sensor structure Figure 2 ;
[0018] Figure 3 Structure diagram of the DPF differential pressure sensor structure Figure 3 ;
[0019] Figure 4 Structure diagram of the DPF differential pressure sensor structure Figure 4 ;
[0020] Figure 5 Sectional view of the DPF differential pressure sensor structure Figure 1 ;
[0021] Figure 6 Sectional view of the DPF differential pressure sensor structure Figure 2 .
[0022] In the figure: 1, shell; 101, socket; 102, mounting hole; 2, pressure sensing module; 201, high-pressure area; 202, low-pressure area; 3, high-pressure interface; 301, first slope; 302, second slope; 4, low-pressure interface; 401, third slope; 5, front cover; 501, rear cover; 502, pressing plate. DETAILED DESCRIPTION
[0023] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, and is not all the embodiment.
[0024] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.
[0025] Embodiment:
[0026] Referring to Figures 1-6 An anti-icing DPF differential pressure sensor structure, comprising a shell 1 and a pressure sensing module 2, the pressure sensing module 2 is used for monitoring and measuring the pressure difference change inside the diesel particulate filter DPF of the automobile, the pressure sensing module 2 is fixedly installed in the shell 1, and high-pressure areas 201 and low-pressure areas 202 are arranged on the two sides of the pressure sensing module 2; the bottom of the high-pressure area 201 is provided with a first slope 301, and the bottom of the low-pressure area 202 is provided with a third slope 401.
[0027] The bottom of the shell 1 is connected with a high-pressure interface 3 and a low-pressure interface 4, the high-pressure interface 3 and the low-pressure interface 4 are used for connecting a gas conveying pipeline conveying exhaust gas; the high-pressure interface 3 is in communication with the lowest part of the first slope 301; and the low-pressure interface 4 is in communication with the lowest part of the third slope 401.
[0028] When the exhaust gas containing water vapor enters the inside of the shell 1 through the high-pressure interface 3 and the low-pressure interface 4, that is, enters the high-pressure areas 201 and the low-pressure areas 202 on the two sides of the pressure sensing module 2, when the exhaust gas condenses into water in the working process of the pressure sensing module 2, the water will be attached to the inner walls of the high-pressure areas 201 and the low-pressure areas 202, when the water gathers into a plurality, the water will slide downward through its own gravity, the condensed water in the high-pressure areas 201 will slide onto the first slope 301 and then continue to slide downward until sliding into the high-pressure interface 3 and then being discharged through the gas conveying pipeline; the condensed water in the low-pressure areas 202 will slide onto the third slope 401 and then continue to slide downward until sliding into the low-pressure interface 4 and then being discharged through the gas conveying pipeline.
[0029] Through the design of the first slope 301 and the third slope 401, when condensed water appears in the shell 1, that is, the condensed water can be quickly discharged, realizing the effect of automatic drainage, avoiding staying in the shell 1 for a long time, and further avoiding the problems of internal cavity icing and blockage and unable to normally sense pressure.
[0030] As Figures 3-5The second slope 302 is arranged on one side of the high-pressure area 201 close to the high-pressure interface 3, and meanwhile, the second slope 302 is arranged on one side of the high-pressure interface 3 close to the pressure sensing die set 2, and the bottom of the second slope 302 is communicated with the high-pressure interface 3.
[0031] Through the design of the second slope 302, the condensate drainage efficiency in the high-pressure area 201 can be further improved, so that the condensate attached to the side wall of the high-pressure area 201 can be quickly drained into the high-pressure interface 3, and the stability of the pressure sensing die set 2 can be improved.
[0032] As shown in Figure 1 , Figure 2 , Figure 5 , Figure 6 The shell 1 is fixedly connected with a front cover 5 on one side close to the high-pressure area 201, and is fixedly connected with a rear cover 501 on one side close to the low-pressure area 202.
[0033] When the pressure sensing die set 2 is installed, the shell 1 is sealed and fixed on both sides through the front cover 5 and the rear cover 501.
[0034] The front cover 5 and the rear cover 501 are fixed on both sides of the shell 1 through glue.
[0035] As shown in Figure 5 and Figure 6 The pressure sensing die set 2 is fixedly connected in the shell 1 through a pressing plate 502; and the pressing plate 502 is arranged on one side of the high-pressure area 201.
[0036] When the pressure sensing die set 2 is installed, the pressure sensing die set 2 is fixed in the shell 1 through glue, and then the pressing plate 502 is fixed in the shell 1 through a hot riveting process and is pressed on the pressure sensing die set 2, so that the stability is improved.
[0037] One end of the shell 1 is provided with a socket 101, and the socket 101 is connected with the pressure sensing die set 2 through a PIN pin.
[0038] The shell 1 is further provided with a mounting hole 102.
[0039] The shell 1 is installed at a designated position through the mounting hole 102.
[0040] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. An anti-icing DPF differential pressure sensor structure, comprising a shell (1) and a pressure sensing module (2), wherein the pressure sensing module (2) is fixedly installed in the shell (1), and characterized in that: two sides of the pressure sensing module (2) are provided with a high-pressure area (201) and a low-pressure area (202); a first slope (301) is arranged at the bottom of the high-pressure area (201), and a third slope (401) is arranged at the bottom of the low-pressure area (202).
2. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, The shell (1) is connected with a high-pressure interface (3) and a low-pressure interface (4) at the bottom; the high-pressure interface (3) is communicated with the lowest part of the first slope (301); the low-pressure interface (4) is communicated with the lowest part of the third slope (401).
3. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, A second slope (302) is arranged on the side wall of the high-pressure area (201) close to the high-pressure interface (3).
4. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, A front cover (5) is fixedly connected to one side of the shell (1) close to the high-pressure area (201), and a rear cover (501) is fixedly connected to one side of the shell (1) close to the low-pressure area (202).
5. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, The pressure sensing module (2) is fixedly connected in the shell (1) through a pressing plate (502); the pressing plate (502) is located on one side of the high-pressure area (201).
6. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, One end of the shell (1) is provided with a socket (101).
7. The anti-icing DPF differential pressure sensor structure of claim 1, wherein, The shell (1) is further provided with a mounting hole (102).