JPH0521107U - Oil filter - Google Patents

Abstract

(57) [Summary] [Purpose] The oil filter container has a double wall structure
The space between the heavy walls is filled with a heat storage agent that forms a liquid phase at room temperature, and the oil pressure of the low temperature oil presses the nuclear generator to solidify and generate heat, and the temperature of the oil is quickly raised to the proper viscosity. A body 2 of an oil filter 1 is a double wall having an outer wall 10 and an inner wall 11, and a heat storage agent 15 in a liquid phase is enclosed in a space between them. With the start of the internal combustion engine, low-temperature and high-viscosity oil is pressure-fed into the container and presses the nuclear generator arranged in the heat storage agent via the pressure receiving window 13 provided on the inner wall 11.
Since the exothermic agent solidifies and generates heat by the operation of the nuclear generator, the oil is quickly warmed to an appropriate viscosity. When the temperature of the oil rises above a certain value, the heat storage agent liquefies and maintains the liquid phase even at room temperature.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an oil filter for an internal combustion engine.

[0002]

[Prior Art]

 The oil supplied to the sliding parts of an internal combustion engine must be maintained in an appropriate viscosity range, but especially when the engine is started in the cold season, the oil has a low temperature and a high viscosity, so the resistance of the oil supply line is high. Then, there is a problem that the supply amount to the sliding part becomes insufficient and engine burnt occurs, or the frictional resistance of the sliding part becomes large and the fuel consumption increases.

As a countermeasure, for example, an oil filter disclosed in Japanese Patent Laid-Open No. 55-54619 has a double wall container and cooling water is circulated between the double walls. This is because the temperature of cooling water rises faster than that of oil at the time of starting, so at the beginning of engine operation, heat is applied to the oil from the cooling water to accelerate the temperature rise of the oil and reduce the viscosity. is there.

Further, Japanese Utility Model Laid-Open No. 59-152171 discloses a fuel filter for a diesel engine in which an electric heater is embedded in a container. This is to heat the fuel at a low temperature in order to prevent the filter from being clogged with the exudates of low quality fuel.

[0005]

[Problems to be solved by the device]

 In all of the above conventional devices, a heating means is provided in the container to raise the temperature of the oil or fuel flowing into the container. However, the former oil filter uses a space between the double walls of the container. Since it is connected to the cooling water piping, it requires space for piping and maintenance management such as water leakage prevention. In addition, the temperature rise of the cooling water is not necessarily fast enough, so the temperature rise of the heat received by the oil is slow.

The latter fuel filter structure may be used for an oil filter, but the electric heater must be connected to a power source with a switch interposed. If this switch is a manual switch, there is a risk of inoperability due to forgetting to turn on the switch or overheating due to forgetting to open the switch.In order to perform automatic control, the opening means linked with the engine start, the timer and the oil temperature sensor are used. A control circuit including detection means such as means must be provided.

In either case, the heat source energy must be fed and controlled by connecting an external pipe or wiring to the oil filter.

[0008]

[Means for Solving the Problems]

 The oil filter of the present invention has a container having a double wall, a space between the double walls is filled with a heat storage material which is in a liquid phase at room temperature, and a pressure receiving window is provided on an inner side wall of the double wall. A nuclear generator is placed facing the pressure receiving window, and the pressure of the oil flowing into the container is detected by the nuclear generator through the pressure receiving window, and the heat storage agent turns into a solid phase to generate heat by the operation of the nuclear generator. It is a thing.

[0009]

[Action]

 When the internal combustion engine is started, the initial pressure of the oil that has been pumped acts on the oil filter container that is in a non-pressure state. When the nuclear generator detects this initial pressure through the pressure receiving window and operates, the heat storage agent becomes a solid phase and generates heat. This heat is given to the oil through the inner wall of the container, and the temperature of the oil rises rapidly and the viscosity decreases. When the solidification of the heat storage agent is completed, heat generation also stops.

The heat storage agent becomes a liquid phase when heated to a higher temperature and maintains the liquid phase even when the temperature reaches room temperature. Therefore, the oil in the oil filter further rises in temperature while the engine continues to operate and the oil cooler When maintained at a high temperature within the proper range due to such actions, the heat storage agent receives heat from the oil and becomes a liquid phase, which remains in the liquid phase even if the temperature drops to normal temperature after the operation is stopped.

[0011]

【Example】

 An example is shown in FIG. The oil filter 1 is a container in which the open end of a cup-shaped body 2 is covered with a cover 3 having an oil inlet hole 4 and an oil outlet hole 5, and a filter element 6 is disposed inside the body. 3 is tightened and the filter element is pressed toward the cover 3 side with the spring 8 interposed.

The body 2 is a double wall composed of an outer wall 10 and an inner wall 11 except for the periphery of an opening 9 through which the center bolt 7 is inserted, and a gap 12 is formed between them. Further, a plurality of pressure receiving windows 13 are provided on the inner wall 11. The pressure receiving window 13 covers the opening of a small area with an elastic film 14 made of synthetic resin in a liquid-tight manner and applies a sealant to the peripheral edge to weld and fix the window frame ring 17. A heat storage agent 15, which is in a liquid phase at room temperature, is enclosed in the gap 12, and the nuclear generator 16 is arranged so as to face the pressure receiving window 13.

The heat storage material 15 is, for example, a sodium acetate-based material as disclosed in JP-A-60-120785 or JP-A-60-168983, and contains a crystal nucleating agent that induces solidification. It was made. Nucleators are like small pushbuttons, and are arranged in an appropriate number in the heat storage agent, and mechanically stimulate the heat storage agent by external pressure to start solidification of the heat generating agent. The heat storage agent liquefies when heated to 80 ° to 90 ° and maintains the liquid phase even when the temperature drops to room temperature.

As shown in FIG. 2, the double-wall structure of the body 2 has an outer wall 10 having a bolt hole 20 in the center, an inner wall 11 having a bolt hole 21, and an annular spacer 22 sandwiched in the bolt hole portion. It was brazed together. The heat storage agent 15 is sealed from the gap between the double walls at the lower opening end, the nuclear generator 16 is arranged in accordance with the position of the pressure receiving window 13, and the annular sealing ring 23 is fitted in the gap. A sealing agent is applied, and caulking rings 24 are caulked around the lower edges of the outer wall 10, the sealing ring 23, and the inner wall 11. It should be noted that air bubbles are made to exist when the heat storage edge agent 15 is enclosed so as to correspond to the volume change at the time of liquid-solid phase transformation. The body 2 is formed in this way. The device can also be applied to a disposable oil filter. In that case, the opening 9 of the body 2, that is, the bolt holes 20, 21 of FIG. 2 are not provided.

[0015]

[Effect of the device]

 In the oil filter of this invention, the heat storage agent enclosed in the double wall of the container detects the inflow pressure of the oil, solidifies and generates heat, and liquefies at a high temperature to maintain a liquid phase even when it reaches room temperature. No external piping or wiring is required, which is advantageous in selecting the installation space. Also, when installing the oil filter, troublesome work for connecting to piping and wiring is not required. In addition, it is extremely convenient to use it at all times because it does not need to control the heating medium or heat source energy supply / stop, and allows the oil filter itself to self-control and continuously operate in the circulation cycle.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is a sectional view of a main part of a container according to an embodiment.

[Explanation of symbols]

 2 body 13 pressure receiving window 15 heat storage agent 16 nuclear generator

Claims (1)

[Scope of utility model registration request] 1. A container accommodating a filter element has a double wall structure, a space between the double walls is filled with a heat storage agent which forms a liquid phase at room temperature, and a pressure receiving window is formed on an inner wall of the double wall. In the space, the nuclear generator is disposed so as to face the pressure receiving window, and the nuclear pressure is pushed through the pressure receiving window by the oil pressure flowing into the container, and the heat storage agent is activated by the operation of the nuclear generator. An oil filter for an internal combustion engine that solidifies and generates heat.