Double-heating type diesel oil filter assembly

Abstract

The utility model discloses a double-heating type diesel oil filter assembly which comprises a base located at the top, a middle shell and a lower shell are sequentially connected to the base downwards, a cylindrical filter element is arranged in the middle shell, an annular oil inlet cavity is defined by the circumferential surface of the filter element and the middle shell, a base inner cavity communicated with the oil inlet cavity is formed in the base, and the lower shell is arranged in the base. A bottom cavity is formed in the lower shell and is communicated with the oil outlet cavity through a hydrophobic net; an upper heater is arranged in an inner cavity of the base, a lower heater is arranged in a bottom cavity of the base, the upper heater is connected with an upper connector, and the lower heater is connected with a lower connector; the upper heater is connected with a vehicle-mounted circuit through an upper connector, and the lower heater is connected with the vehicle-mounted circuit through a lower connector. The diesel oil heater is simple in structure, diesel oil is heated at the upper end and the lower end at the same time through the upper heater in the inner cavity of the base and the lower heater in the bottom cavity, the oil temperature can be effectively increased, the heating requirement of a diesel oil filter in a high cold area is met, and it is guaranteed that the diesel oil has low viscosity and good fluidity; and the fuel supply requirement of the diesel engine is met.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel filtration, in particular to the heating technology of a diesel filter assembly. Background Art

[0002] As a key component in the low-pressure supply system, the diesel filter bears the function of filtering solid particulate impurities in diesel, water mixed in diesel, and other impurities that cause wear of precision components of the diesel engine and affect engine combustion, providing clean diesel for the engine combustion and ensuring the normal operation of the fuel system.

[0003] When the temperature is relatively low, the viscosity of diesel increases, the resistance of diesel flowing through the diesel filter increases, so the pressure drop increases. When starting the engine, it may be difficult to start, and insufficient fuel supply to the engine may also occur during the engine operation. In order to reduce the resistance and pressure drop of diesel passing through the diesel filter, a diesel filter with a heater has emerged.

[0004] The diesel filter includes a base at the top, the base is connected downward to a middle housing, the middle housing is connected downward to a lower housing, a cylindrical filter element is arranged in the middle housing, an annular oil inlet cavity is formed between the circumferential surface of the filter element and the middle housing, the base is connected with an oil inlet pipe and an oil outlet pipe, a base inner cavity communicating with the oil inlet cavity is provided in the base, a manual pump is arranged in the base inner cavity, a clean oil passage is arranged in the base, a one-way valve is arranged on the clean oil passage, and the inner cavity (clean oil side) of the filter element communicates with the oil outlet pipe through the clean oil passage. The opening direction of the one-way valve faces the oil outlet pipe.

[0005] A bottom cavity is arranged in the lower housing, and the bottom cavity communicates with the oil outlet cavity. The bottom cavity has an installation opening for installing a drain valve and a water level sensor.

[0006] The installation position of the heater can be in the base inner cavity. In most regions of our country, installing one heater in the diesel filter can meet the need of heating diesel, maintaining low viscosity and good fluidity of diesel. For high-cold regions (such as parts of Northeast China, Inner Mongolia, and Xinjiang), the winter temperature often drops below minus 20 degrees Celsius or even below minus 30 degrees Celsius. In these regions, installing one heater in the diesel filter often cannot meet the heating requirement of diesel, and problems such as difficult starting may still occur due to low oil temperature.

[0007] In addition, the heater needs to be connected to the vehicle-mounted circuit through a connector. The connector has a wire harness connected to the heater, forming a trailing wire structure, and various faults such as wire harness breakage and damage, and false alarm caused by water ingress into the wire may occur. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a double-heating type diesel filter assembly, which can meet the use requirements of vehicles using diesel engines in high-cold regions by reasonably arranging double heaters.

[0009] To achieve the above object, the double-heating diesel filter assembly of the present utility model includes a base located at the top. The base is connected downward to a middle housing, and the middle housing is connected downward to a lower housing. A cylindrical filter element is provided inside the middle housing. An annular oil inlet chamber is formed between the circumferential surface of the filter element and the middle housing. The base is connected with an oil inlet pipe and an oil outlet pipe. The base cavity inside the base communicates with the oil inlet chamber. A bottom cavity is provided inside the lower housing, and the bottom cavity communicates with the oil outlet chamber;

[0010] An upper heater is provided in the base cavity, and a lower heater is provided in the bottom cavity. The upper heater is connected with an upper connector, and the lower heater is connected with a lower connector; the upper heater is connected to the vehicle-mounted circuit through the upper connector, and the lower heater is connected to the vehicle-mounted circuit through the lower connector.

[0011] The upper connector is in threaded fit with the base and a sealing ring is provided at the connection.

[0012] A heating interface for the lower heater to pass through the lower housing is provided on the lower housing, and the lower connector is located outside the heating interface; the lower heater is in threaded fit with the interface and a sealing ring is provided at the connection.

[0013] The structure between the upper connector and the upper heater is a direct connection structure, and the structure between the lower connector and the lower heater is a direct connection structure.

[0014] A manual pump is provided in the base cavity, a clean oil passage is provided in the base, a check valve is provided on the clean oil passage, and the inner cavity of the filter element communicates with the oil outlet pipe through the clean oil passage; the opening direction of the check valve faces the oil outlet pipe.

[0015] An installation opening for installing a drain valve and a water level sensor is provided on the lower housing.

[0016] The present utility model has the following advantages:

[0017] The structure of the present utility model is simple. Through the upper heater in the base cavity and the lower heater in the bottom cavity, the diesel is heated simultaneously at the upper and lower ends, which can effectively increase the oil temperature, meet the heating requirements of the diesel filter in high-cold regions, ensure that the diesel has a lower viscosity and better fluidity, and meet the fuel supply requirements of the diesel engine.

[0018] In the prior art, the connection between the connector in the base and the base is a friction welding connection or a snap connection, which cannot be replaced. In the present utility model, the connector can be conveniently replaced through threaded fit.

[0019] The lower heater is fitted with the interface thread and provided with a sealing ring, which not only ensures sealing but also facilitates the replacement of the lower heater. In the prior art, a relatively long and movable wire harness (i.e., a trailing wire) is reserved between the connector and the heater. The present utility model cancels the trailing wire and adopts a direct connection structure, avoiding risks such as the breakage and damage of the trailing wire and the poor sealing at the trailing wire caused by the reserved trailing wire structure, preventing the wire harness from being damaged by external forces, and improving the reliability and stability of the product.

[0020] The one-way valve can isolate the manual pump and prevent the manual pump from sucking the clean oil on the downstream side when pumping oil, ensuring the normal flow direction of diesel when pumping oil by the manual pump. The installation port facilitates the installation of accessories such as a drain valve and a water level sensor for the diesel filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic half-sectional structure view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] As Figure 1 shown, the double-heating type diesel filter assembly of the present utility model includes a base 1 at the top. The base 1 is connected downward to a middle housing 2, and the middle housing 2 is connected downward to a lower housing 3. A cylindrical filter element 4 is provided in the middle housing 2. An annular oil inlet chamber 5 is formed between the circumferential surface of the filter element 4 and the middle housing 2. The base 1 is connected with an oil inlet pipe 6 and an oil outlet pipe 15.

[0023] The base 1 has a base inner cavity 7 communicating with the oil inlet chamber 5. A bottom chamber 8 is provided in the lower housing 3, and the bottom chamber 8 communicates with the oil inlet chamber 5 through a hydrophobic net; the hydrophobic net is a conventional technology and is not shown in the figure.

[0024] An upper heater 9 is provided in the base inner cavity 7, and a lower heater 10 is provided in the bottom chamber 8. The upper heater 9 is connected with an upper connector 11, and the lower heater 10 is connected with a lower connector; the upper heater 9 is connected to the vehicle-mounted circuit through the upper connector 11, and the lower heater 10 is connected to the vehicle-mounted circuit through the lower connector.

[0025] Both the upper connector 11 and the lower connector are conventional technologies, and the lower connector is not shown in the figure. The filter element 4 is preferably a coalescing filter element 4.

[0026] The structure of the present utility model is simple. Through the upper heater 9 in the base inner cavity 7 and the lower heater 10 in the bottom chamber 8, the diesel is heated simultaneously at the upper and lower ends. The heat of the lower heater 10 can be conducted upward, which can effectively increase the oil temperature, meet the heating requirements of the diesel filter in high-cold regions, ensure that the diesel has a lower viscosity and better fluidity, and meet the fuel supply requirements of the diesel engine.

[0027] The upper connector 11 is in threaded fit with the base 1 and a sealing ring is provided at the connection. In the prior art, the connector inside the base 1 is connected to the base 1 by friction welding or snap connection and cannot be replaced. In the present utility model, the threaded fit facilitates the replacement of the connector. The sealing ring is a conventional technique and is not shown in the figure.

[0028] The lower shell 3 is provided with a heating interface 12 for the lower heater 10 to pass through the lower shell 3, and the lower connector is located outside the heating interface 12; the lower heater 10 is in threaded fit with the interface and a sealing ring is provided at the connection. The threaded fit of the lower heater 10 with the interface and the provision of the sealing ring not only ensure sealing but also facilitate the replacement of the lower heater 10.

[0029] The upper connector 11 and the upper heater 9 are in a direct connection structure, and the lower connector and the lower heater 10 are in a direct connection structure. In the prior art, a relatively long and movable wire harness (i.e., a trailing wire) is reserved between the connector and the heater. The present utility model cancels the trailing wire and adopts a direct connection structure to avoid risks such as breakage and damage of the trailing wire and poor sealing at the trailing wire connection caused by the reserved trailing wire structure, avoid external force damage to the wire harness, and improve the reliability and stability of the product.

[0030] A manual pump 13 is provided in the inner cavity 7 of the base, a clean oil passage is provided in the base 1, a check valve 14 is provided on the clean oil passage, and the inner cavity (clean oil side) of the filter element 4 communicates with the oil outlet pipe 15 through the clean oil passage; the opening direction of the check valve 14 faces the oil outlet pipe 15.

[0031] When starting the engine after a long period of non-operation, in scenarios such as after replacing the diesel filter and after refueling when the fuel has run out, it is necessary to pump oil through the manual pump 13.

[0032] The check valve 14 can isolate the manual pump 13 and prevent the manual pump 13 from sucking in the clean oil on the downstream side when pumping oil, ensuring the normal flow direction of diesel when the manual pump 13 pumps oil.

[0033] The lower shell 3 is provided with an installation opening for installing a drain valve and a water level sensor. The installation opening facilitates the installation of accessories such as a drain valve and a water level sensor for the diesel filter.

[0034] During the assembly process, since the trailing wire structure is cancelled, there are no risks such as breakage and damage of the wire harness, poor sealing of the wire harness, and external force damage to the wire harness. When in use, the present utility model is installed on a motor vehicle, between the fuel tank and the diesel engine, and is used to filter the diesel supplied to the engine. After the motor vehicle is powered on, the upper heater 9 and the lower heater 10 work simultaneously to quickly heat up the diesel, meeting the diesel heating requirements under cold weather conditions.

[0035] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. A dual-heating diesel filter assembly includes a base at the top, the base is connected to a middle shell downward, the middle shell is connected to a lower shell downward, a cylindrical filter element is arranged in the middle shell, a ring-shaped oil inlet cavity is formed between the circumferential surface of the filter element and the middle shell, the base is connected to an oil inlet pipe and an oil outlet pipe, the base has a base inner cavity communicating with the oil inlet cavity, the lower shell is provided with a bottom cavity, and the bottom cavity is communicated with the oil outlet cavity; the characteristics are: An upper heater is arranged in the inner cavity of the base, and a lower heater is arranged in the bottom cavity. The upper heater is connected to an upper connector, and the lower heater is connected to a lower connector. The upper heater is connected to the vehicle circuit via the upper connector, and the lower heater is connected to the vehicle circuit via the lower connector.

2. The dual-heating diesel filter assembly according to claim 1 is characterized in that: The upper connector is threadably matched with the base and a sealing ring is provided at the connection.

3. The dual-heating diesel filter assembly according to claim 2 is characterized in that: The lower shell is provided with a heating interface for the lower heater to pass through the lower shell, and the lower connector is located outside the heating interface; the lower heater is matched with the interface thread and a sealing ring is provided at the connection.

4. The dual-heating diesel filter assembly according to claim 3 is characterized in that: The upper connector and the upper heater are directly connected, and the lower connector and the lower heater are directly connected.

5. The dual-heating diesel filter assembly according to claim 1 is characterized in that: A manual pump is arranged in the inner cavity of the base, a clean oil passage is arranged in the base, a one-way valve is arranged on the clean oil passage, the inner cavity of the filter element is connected with the oil outlet pipe through the clean oil passage; the opening direction of the one-way valve is toward the oil outlet pipe.

6. The dual-heating diesel filter assembly according to claim 1 is characterized in that: The lower shell body is provided with a mounting opening for mounting a drain valve and a water level sensor.

Images