JPH0537385U - Liquid filtration device - Google Patents

Abstract

(57) [Summary] [Purpose] Manually set the flow path according to the temperature of the liquid to be filtered.
Alternatively, another object of the present invention is to provide a liquid filtration device that can obtain desired purified water without being affected by the temperature of the liquid by automatically switching. [Structure] Filter medium cartridges 26 and 27 filled with filter medium so as to exhibit the same filtration capacity are respectively housed in two filtration chambers 22 and 23 arranged in parallel for filtering liquids of different temperatures, and the two filtration chambers In a liquid filtering device in which a flow passage can be switched by a valve body 13 inserted into a water supply passage 12 communicating with the chambers 22 and 23, a shape in which the valve body 13 is prevented from slipping out to the water supply port side in the water supply passage 12 By the operation coil spring 14 made of a memory material and the return coil spring 15 arranged on the same axis as the operation coil spring 14 so as to be slidably held, the water supply channel 1
The shape of the coil spring 14 for operation is recovered by the high temperature raw water passing through the inside of the valve 2, and the valve body 13 is slid to switch the flow path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid filtering device, and more particularly to a liquid filtering device that filters liquids having different temperatures.

[0002]

[Prior Art]

 Conventionally, as a liquid filtering device, for example, like a household water purifier, tap water is injected into a filtration chamber filled with activated carbon (filter material) and filtered to remove organic substances such as trihalomethanes and chlorine in tap water. It is known to remove.

[0003]

[Problems to be solved by the device]

 However, the filter medium such as activated carbon generally has an adsorption capacity for an organic substance such as trihalomethane that varies depending on the temperature of the liquid to be filtered. Therefore, even if tap water at room temperature can be injected to adsorb organic matter, if hot water is injected into the same filter medium, the organic matter once adsorbed on the filter medium will peel off and flow out to obtain the desired purified water. There was a problem that it was not possible.

Therefore, in view of the above problems, the present invention provides a liquid filtration device that can obtain desired purified water by manually or automatically switching the flow path according to the temperature of the liquid to be filtered. With the goal.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the liquid filtering device according to the present invention fills two filter chambers arranged in parallel for filtering liquids having different temperatures with a filter medium, respectively, and provides a water supply passage communicating with the two filter chambers. In addition, a valve body for switching the flow path is inserted. Further, the valve element is composed of an operation coil spring made of a shape memory material that is prevented from coming off from the water supply port side in the water supply passage, and a return coil spring arranged on the same axis as the operation coil spring. It may be configured to be held so as to be slidable.

[0006]

[Action]

 Therefore, according to the present invention, the filtration chamber can be arbitrarily selected according to the temperature of the liquid by switching the flow path with the valve body. Also, when the operating coil spring made of a shape memory material recovers its shape in response to the temperature of the liquid passing through the water supply passage, the valve body pressed by this slides and automatically switches the flow passage. The filtration chamber will be automatically selected according to the temperature of the liquid.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings shown in FIGS. The liquid filtering device according to the present embodiment comprises a temperature sensing valve 10 and a device body 20. The temperature sensing valve 10 has a valve in a water supply passage 12 whose one end communicates with a water supply port 11. The valve body 13 is inserted through the body 13, and the valve body 13 is arranged on the same axis as the operation coil spring 14 made of a shape memory material, which is retained on the water supply port 11 side in the water supply passage 12. It is held so as to be slidable together with the return coil spring 15. Since the operating coil spring 14 is located on the water supply port 11 side in the water supply passage 12, the operating coil spring 14 recovers its shape in accordance with the temperature of the supplied raw water. Examples of the shape memory material include shape memory alloys and shape memory organic materials.

On the other hand, the apparatus main body 20 is composed of two filtration chambers 22 and 23 partitioned by a partition wall 21 provided at the center, and the filtration chambers 22 and 23 are a normal temperature raw water flow path 24 and a high temperature raw water flow path. The water supply channels 12 communicate with each other via 25. The filter chambers 22 and 23 detachably accommodate filter medium cartridges 26 and 27 filled with a filter medium such as activated carbon, and communicate with the purified water outlets 28 from the openings at the center of the bottom surface, respectively. ing. Further, in this embodiment, the activated carbon density in the filter medium cartridge 27 is made higher than the activated carbon density in the filter medium cartridge 26, so that the filtration capacity when high temperature raw water is injected into the filtration chamber 23 and the normal temperature in the filtration chamber 22 It is equivalent to the filtration capacity when raw water is injected. Reference numeral 29 is an O-ring for sealing.

Next, the operation of the liquid filtering apparatus according to this embodiment will be described. Before injecting the raw water, the coil spring for operation 14 made of a shape memory material is compressed by the spring force of the coil spring 15 for return, and the communication hole 13a of the valve body 13 is supplied to the water supply passage through the flow passage 24 for room temperature raw water. 12 and the filtration chamber 22 are connected (FIG. 2).

When the room temperature raw water is supplied from the water supply port 11, the operating coil spring 14 does not recover its shape, so that the room temperature raw water passage 24 is passed through the communication hole 13 a of the valve body 13 to pass through the filtration chamber 22. Room temperature raw water flows into the room. Then, the room temperature purified water that has been filtered through the filter medium cartridge 26 flows out from the purified water outlet 28.

Then, when high temperature raw water is supplied from the water supply port 11, the operating coil spring 14 recovers the shape memorized and expands with a strong force, so that the return spring 15 is compressed via the valve body 13. Therefore, the valve body 13 slides to the left in FIG. 1, the communication hole 13a of the valve body 13 is switched from the normal temperature raw water flow path 24 to the high temperature raw water flow path 25, and the high temperature raw water is supplied to the flow path 25. To flow into the filtration chamber 23. Then, the high temperature purified water that has passed through the filter medium cartridge 27 and is filtered out from the purified water outlet 28 as described above.

In the present embodiment, the case where the filter media made of the same material are filled in the filtration chambers 22 and 23 respectively to make the filtration capacities equal is described, but the present invention is not limited to this, and filter media of different materials may be used. Good. Further, the valve body is not limited to be operated by the operation coil spring made of the shape memory material, and may be manually operated, as a matter of course.

[0013]

[Effect of the device]

 As is clear from the above description, according to the liquid filtering device of the present invention, the valve body can be operated to switch the flow path to allow the hot water to flow into the dedicated filtration chamber. Therefore, unlike the conventional example, the organic matter once adsorbed on the filter medium does not peel off and flow out, so that the desired purified water can always be obtained. In particular, according to the liquid filtering device of the second aspect, when the raw water to be filtered comes into contact with the operating coil spring made of a shape memory material, the shape of the operating coil spring changes depending on the temperature of the raw water, and the valve body Slide to move the flow path. For this reason, the raw water can be filtered by flowing it into a special filtration chamber filled with a filter medium so as to exert a desired filtration capacity according to the temperature of the raw water, so that it is always desired without being affected by the temperature of the raw water to be filtered. It has the effect of producing purified water.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a liquid filtering device according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part of the liquid filtering device according to the present embodiment.

FIG. 3 is an enlarged sectional view of a main part of the liquid filtering device according to the present embodiment.

[Explanation of symbols]

10 ... Temperature sensing valve, 11 ... Water supply port, 12 ... Water supply channel, 13
... Valve body, 14 ... Coil spring for operation, 15 ... Coil spring for return, 20 ... Device body, 22, 23 ... Filtration chamber, 24 ... Flow path for normal temperature raw water, 25 ... Flow path for high temperature raw water, 26, 27 ... Filter medium cartridge, 28 ... Purified water outlet.

Claims (2)

[Scope of utility model registration request] 1. Two juxtaposed filters for filtering liquids of different temperatures
Fill each of the two filter chambers with a filter medium and
A liquid filtering device characterized in that a valve body for switching a flow passage is inserted into a water supply passage communicating with one filtration chamber. 2. A coil spring for operation, which is made of a shape memory material, in which the valve body is prevented from slipping out to the water supply port side in the water supply passage, and a return coil spring arranged on the same axis as the coil spring for operation. The liquid filter device according to claim 1, wherein the liquid filter device is slidably held by and.