JPH04127836U - Water filter device for engine cooling water - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the heating capacity of a car heater by making it possible to install a water filter device and a car heater in series in a cooling water bypass passage of an engine. [Configuration] The filter has a bypass valve that is automatically opened when the differential pressure between the inlet side cooling water pressure and the outlet side cooling water pressure, which is caused by clogging of the filter element of the water filter device, exceeds a set value. It is provided in the cooling water bypass passage provided between the inlet passage and the outlet passage of the head, or it is provided between the inlet chamber of the water filter device and the outlet side inner pipe of the filter element. By arranging the above-mentioned water filter device in series with the car heater in the engine's cooling water bypass passage, sufficient cooling water can be supplied to the car heater not only when the filter element is only slightly clogged but also when the set limit is exceeded. Flow rate can be secured.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a water filter that filters engine cooling water to remove foreign substances such as scale. This invention relates to a filter device.

0002

[Conventional technology]

The typical configuration of an engine cooling water system in vehicles such as trucks will be explained with reference to Figure 4. I will clarify. In the figure, reference numeral 10 is a conceptually shown engine, and 12 is a crank of the same engine. A water pump driven in conjunction with the shaft; 14 is the cylinder head of the engine 10; It is installed in the cooling water outlet installed in the cooling water outlet and detects the cooling water temperature to control the flow of cooling water. 16 is a well-known thermostat, 16 is the same thermostat 14 and water pump 1. 2, a radiator 18 is interposed between the thermostat 14 and the water point. A car heater or an air conditioner installed in the first bypass passage 20 that connects the The heater core of the air conditioner (hereinafter simply referred to as car heater), 22 is the above-mentioned server. In the second bypass passage 24 connecting the Mostat 14 and the water pump 12. This is an interposed water filter device. In the above cooling water system, when the cooling water temperature of the engine 10 is lower than the set temperature, , by operating the temperature-responsive valve device of the thermostat 14, the engine cooling water is turned off. Qualitatively the entire amount flows through the first and second bypass passages 20 and 24, and the cooling water temperature reaches the set temperature. If the temperature exceeds the temperature, the temperature-responsive valve device of the thermostat 14 will operate, causing of the engine coolant flows to the radiator 16, and the remaining coolant flows to the first and second bypasses. flows into gas passages 20 and 24. On the other hand, the water filter device 22 has a Inside the casing, there is a filter element that filters out foreign substances such as scale in the cooling water. and an additive mainly consisting of a rust preventive agent that is dissolved in cooling water to produce a rust preventive effect. The stored cartridge type is widely used. The same water filter device The filter element 22 gradually becomes observable as the engine 10 accumulates operating hours. This will cause clogging and reduce the amount of water flowing through the filter device, so please do not use the car heater as described above. The heater core 18 of the heater or air conditioner is located within the first bypass passage 20 and Water filter device 22 is arranged within second bypass passage 24 . Therefore, the amount of cooling water flowing through the car heater 18 under normal conditions is The amount of gas flowing into the gas passage 24 decreases, and the heating capacity of the car heater 18 decreases. There was a problem.

0003

[Problem that the idea aims to solve]

This invention is applied to water filter devices installed in the cooling water system of vehicle engines. The aim is to improve the heating capacity of car heaters by making structural improvements. That is.

0004

[Means to solve the problem]

This invention was devised to achieve the above purpose, and the engine cooling water is Inside a filter device with a built-in filter element for filtration, or the above filter The above filter element is installed inside the filter head where the device is removably attached. The differential pressure between the inlet side cooling water pressure and the outlet side cooling water pressure generated across the line exceeds the set value. A bypass valve that automatically opens when the cooling water inlet and outlet sides are connected directly. Proposed a water filter device for engine cooling water featuring a pass valve. It is something to do.

[0005]

[Effect]

According to this invention, clogging of the filter element increases with long-term use. The differential pressure between the cooling water pressure on the inlet and outlet sides of the same filter element exceeds the set value. Then, the bypass valve opens and the cooling water inlet side and outlet side bypass the filter element. Pass and communicate directly. Therefore, in the engine cooling water system, - Water filter device in the bypass passage between the mostat and the water pump and the car heater can be arranged in series, allowing engine cooling to flow through the car heater. The heating capacity can be improved by increasing the flow rate of water.

[0006]

【Example】 Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3. (Please note that the figure 4 is substantially the same as each member and portion in the conventional engine cooling water system described above with reference to Section 4. One or corresponding members are given the same reference numerals, and redundant explanation will be omitted. ) First, in the first embodiment of the present invention shown in FIG. A filter head on which a filter device 22 is removably attached, The head 26 has a cooling water inlet passage 28 into which engine cooling water flows, and a filter installation. a cooling water outlet passage 30 for discharging the cooling water filtered by the cooling water outlet 22; The filter device 22 is screwed onto a filter mounting portion 32 that forms the upstream end of the mouth passage 30. or other suitable fixing means. Furthermore, the cooling water inlet passage 28 A cooling water bypass passage 34 is provided between the exit passage 30 and the bypass passage 30. a bypass valve 4 which is normally biased in the closing direction by a set spring 36; 0 is set.

[0007] The filter device 22 includes a cylindrical casing 42 with a bottom, and a cylindrical casing 42 with a bottom. It includes a filter element 44 coaxially housed therein and a lid member 46. . The filter element 44 includes a top plate 50 having a flow restriction hole 48 in the center thereof; a bottom plate 54 on which an additive 52 dissolved by cooling water is mounted; and the top plate 5. A metal inner tube 56 disposed between the bottom plate 54 and the bottom plate 54 and provided with a large number of small holes; A filter member 58 having a large number of folds coaxially arranged on the outside of the filter member 56. has been done. Further, the lid member 46 is watertightly pressed against the lower surface of the filter head 26. an annular sealing member 62 that delimits the inlet chamber 60 and the inlet chamber 60; a plurality of through holes 66 communicating with the inlet chamber 64 on the outer periphery of the filter element; and a central mounting hole 68 connected to the filter mounting portion 32 of the filter head 26. ing.

[0008] As shown in the schematic configuration diagram of FIG. 2, the filter device 22 and the car heater 18 is a single bypass connecting the thermostat 14 and the water pump 12. are arranged in series in the cooling water passage 70, and thus the cooling water inlet passage of the filter head 26. The passage 28 communicates with a bypass opening of the thermostat 14 and is also connected to a cooling water outlet passage. 30 is connected to the car heater 18.

[0009] In the above configuration, the filter element 44 of the water filter device 22 is new. If the filter head 26 is not properly clogged or the degree of clogging is low, The bypass passage 34 is connected to a valve held in the closed position by a set spring 36. Is the bypass opening of the thermostat 14 blocked by the Ipass valve 40? The cooling water flowing into the bypass passage 70 from the cooling water inlet passage of the filter head 26 28 flows into the inlet chamber 64 in the casing 42 via the inlet chamber 60 and the through hole 66. , passes through the filter member 58 and flows into the inner tube 56. Cooling water flowing into the inner pipe 56 is passed through the flow restriction hole 48 while dissolving the additive 52 little by little into the filter head. The cooling water flows into the cooling water outlet passage 30 of the cooling water, and then flows into the car heater 18. Therefore, Raji The entire amount of cooling water that bypassed the heater 16 passes through the car heater 18, and as shown in Fig. The heating capacity is significantly improved compared to the conventional configuration shown in 4.

0010 Next, due to long-term use, the filter element 44 becomes clogged in advance. If the temperature exceeds the level above, the cooling water pressure on the inlet side and the cooling water pressure on the outlet side of the same filter element will decrease. The force and pressure difference exceed the set value, and this pressure difference overcomes the set spring 36 and Ipass valve 40 is automatically opened. For this reason, the cooling water inlet of the filter head 26 The cooling water flowing into the passage 28 bypasses the filter element 44 and is directly cooled. The water flows to the water outlet passage 30 and further to the car heater 18 . Therefore, the filter element Despite significant clogging of the vent 44, there is no problem that reduces the heating capacity of the car heater 18. I don't feel well.

[0011] Next, in the second embodiment of the present invention shown in FIG. 54 is provided with a valve opening 72, and a large number of bypass valves 40 open and close the valve opening 72. The set spring 36 housed in the cage 74 has a water hole in it. It is biased in the closed direction. On the other hand, the filter head 26 has a cooling water inlet inside it. Only the passage 28 and the outlet passage 30 are provided, and these passages communicate with each other. A cooling water bypass passage 34 is not provided. In addition, the filter head 26 The inlet passage 28 communicates with the bypass opening of the thermostat 14 as in the first embodiment. and the outlet passage 30 is connected to the car heater 18. When the filter element 44 is less clogged, the bypass valve 40 is closed. Therefore, the entire amount of cooling water flowing into the bypass passage 70 passes through the filter member 58. and flows into the car heater 18, thus significantly improving heating capacity compared to conventional configurations. do. Next, if the clogging of the filter element 44 exceeds a preset limit, , the cooling water pressure in the inlet chamber 64, that is, the inlet side cooling water pressure, and the cooling water pressure in the inner pipe 56. The set spring 36 is overcome by the differential pressure between the cooling water pressure on the outlet side and the bypass occurs. Valve 40 is automatically opened. As a result, the inlet chamber 64 and the inside of the inner pipe 56 are directly connected. Despite the clogging of the filter element 44, a large amount of cooling water is - Since the air is supplied to the heater 18, a sufficient heating effect can be ensured.

0012 As mentioned above, the engine cooling water water filter device according to the present invention is The inside of the filter device that has a built-in filter element that filters the cooling water of the gin, or The above-mentioned filter is installed inside the filter head to which the above-mentioned filter device is removably attached. The difference between the inlet cooling water pressure and the outlet cooling water pressure created across the main element. When the pressure exceeds the set value, the valve automatically opens and connects the above cooling water inlet and outlet directly. It is characterized by a bypass valve that communicates with the car heater with a simple configuration. It is extremely useful in practical terms because it can effectively improve the heating capacity of the system.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an engine cooling water system including a water filter device according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a schematic configuration diagram similar to FIG. 3 showing a conventional engine cooling water system.

[Explanation of symbols]

10 Engine 12 Water pump 14 Thermostat 16 Radiator 18 Car heater or air conditioner heater core 22 Water filter device 26 Filter head 40 Bypass valve

Claims (1)

[Scope of utility model registration request] Claim 1: Inlet-side cooling water generated across the filter element inside a filter device incorporating a filter element that filters engine cooling water, or inside a filter head to which the filter device is detachably attached. An engine characterized in that it is provided with a bypass valve that automatically opens when the differential pressure between the pressure and the outlet side cooling water pressure exceeds a set value to directly communicate the cooling water inlet side and the outlet side. Cooling water water filter device