KR20110061731A - De-mineralizer for fuel cell - Google Patents

Abstract

PURPOSE: A de-mineralizer for a fuel cell car is provided to reduce the thickness of an ion resin layer that cooling water passes through using a filter member. CONSTITUTION: A de-mineralizer for a fuel cell car comprises a housing and a filter member. The housing comprises inlet and outlet ports and a secondary flow chamber. The secondary flow chamber is connected to the outlet port. The filter member is formed in a hollow shape filled with ion resin and is installed inside the housing. Cooling water flowing into a primary flow chamber passes through the filter member and is discharged to the outside through the secondary flow chamber and the outlet port.

Description

Coolant ion filter for fuel cell vehicle {De-Mineralizer for fuel cell}

The present invention relates to a coolant ion filter for a fuel cell vehicle, and more particularly, to an ion filter for removing ions eluted in the coolant of a fuel cell stack.

A fuel cell system applied to a hydrogen fuel cell vehicle, which is one of environmentally friendly future vehicles, includes a fuel cell stack for generating electric energy from an electrochemical reaction of a reaction gas, a hydrogen supply device for supplying hydrogen as fuel to the fuel cell stack, An air supply device that supplies air containing oxygen, which is an oxidant for electrochemical reaction, to the fuel cell stack, and releases heat, a byproduct of the electrochemical reaction of the fuel cell stack, to the outside to optimally control the operating temperature of the fuel cell stack and It consists of a heat and water management system that performs management functions.

In such a configuration, the fuel cell stack generates electrical energy from an electrochemical reaction of hydrogen and oxygen, which are reaction gases, and emits heat and water as the reaction byproducts. In the fuel cell system, a device for cooling the stack is essential to prevent the temperature of the stack from rising.

In general, in a vehicle fuel cell system, a cooling system for maintaining a fuel cell stack at an optimum temperature has been used to cool water by circulating water through cooling water channels in the stack.

1 is a view illustrating an attached cooling system of the fuel cell vehicle. 1 is a schematic view showing a coolant loop of a fuel cell vehicle, in which a coolant does not pass through a coolant line 3 and a radiator 2 configured between a fuel cell stack 1 and a radiator 2 so that coolant can be circulated. And a bypass line 4 and a three-way valve 5 for bypassing the pump, and a pump 6 for pumping and cooling the cooling water.

On the other hand, the pipes forming the coolant loop of the fuel cell system may be made of SUS 316L, Teflon, Al 3003, food grade silicon, etc. As very limited. SUS 304 cannot be used due to ion elution.

In the case of using an inexpensive material, impurities and ions are eluted into the coolant at the contact area of the coolant, and the eluted ions may cause serious problems in which electricity generated in the fuel cell stack flows through the coolant.

Furthermore, when the ion conductivity of the coolant rises due to component material problems in a fuel cell vehicle that operates while generating electricity while the driver and passenger are on board, leakage currents are generated along the coolant loop, and thus, the electric devices installed in the vehicle and In addition to the impossibility of the normal operation of the drive parts can have a serious impact on the safety of the driver and passengers.

In order to solve this problem, the fuel cell vehicle always senses the conductivity of the coolant, and reflects the control logic that shuts down the system when the conductivity rises above a certain value.

In addition, in order to maintain the ion conductivity of the cooling water below a certain level, an ion filter (De-Mineralizer, DMN) 7 is attached to the cooling water loop to maintain the ion conductivity of the cooling water below a certain level.

The ion filter 7 is a component that serves to lower the ion conductivity of the cooling water to a predetermined level by filtering ions contained in the cooling water entering the fuel cell stack 1, and FIG. 3 is a perspective view illustrating an ion filter, and FIG. 3 is a longitudinal cross-sectional view, and FIG. 4 is a view showing a differential pressure section (section filled with an ion resin) in a conventional ion filter.

The ion filter 100 is usually filled in the housing 110 through which the coolant passes, the port members (inlet and outlet ports) 120 and 130 for allowing the coolant to flow into and out of the housing 110, and the inside of the housing 110. (Iii) mesh assemblies 140a and 140b for supporting the ion resin 101 for filtering the ions contained in the cooling water and the ion resin 101 filled in the housing 110 and preventing leakage. It is configured to include.

In this configuration, the mesh assemblies 140a and 140b pass through the cooling water but keep the small granular ion resin 101 inside the housing 110, and the inlet port 120 and the outlet port at both ends of the housing 110. 130) is installed on both sides to prevent the leakage of the ion resin filled in the housing.

In the ion filter 100 configured as described above, the coolant introduced through the inlet port 120 (connected with the pump outlet end) passes through the mesh assembly 140a, the ion resin 101, and the mesh assembly 140b to allow the outlet port ( 130) (connected with the pump inlet end), the cooling water is filtered while passing through the ion resin 101 to remove ions.

This removal of ions from the coolant prevents leakage of the stack current through the coolant, which in turn makes the vehicle's electrical safety compliant.

However, as shown in FIG. 3, in the conventional ion filter 100, the coolant follows a longitudinal path between the inlet port 120 and the outlet port 130, and the ion resin 101 is charged in the longitudinal path. This section is a section for generating the coolant pressure difference (differential pressure) between the inlet side and the outlet side.

As a result, the coolant passes through the longitudinal (axial) section of the ion resin, which leads to a length of the differential pressure section (the longitudinal section in which the ion resin is filled in FIG. 3) in the ion filter. The pressure difference between the pressure of the cooling water and the cooling water discharged through the discharge port is inevitably large.

5 is a graph showing an increase in the differential pressure according to the increase in the flow rate of the cooling water in the conventional ion filter, it can be seen that the differential pressure is greatly generated as the flow rate of the cooling water increases.

When the coolant passes through the ion resin layer in the longitudinal direction, the width of the ion resin layer that removes the actual ions on the ion resin layer section that contributes to the filtering after the coolant flows through the inlet port, that is, the longitudinal path through which the coolant passes is 15 It is known as ~ 30 mm.

In the case of the ion resin on the downstream side that exceeds the width of the ion resin layer that actually removes the ions, the filtering effect is insignificant. Therefore, the ion resin layer does not need to be as long as the longitudinal length of the housing, and the downstream side except the section which contributes to the actual filtering. The ion resin of is unnecessary.

Thus, in the case of the ion filter in which the coolant flows from one end of the housing and passes through the ion resin layer in the longitudinal direction in the longitudinal direction to reach the other end of the housing, an excessive amount of ion resin is used unnecessarily, resulting in a cost increase. The pressure difference will be greatly increased.

In addition, the ion resin layer near the outlet port is not used for filtering because the cooling water is discharged, so it is not necessary to replace the ion resin, but the ion resin layer near the inlet port has to be replaced at the end of its life. The situation arises.

In this case, although the ion resin near the outlet port can be used more, it is necessary to replace the entire ion filter due to the ion resin near the inlet port, which requires excessive cost in terms of maintenance.

In addition, the conventional ion filter is mounted in a bypass loop instead of the main cooling water loop as shown in FIG. 1, and furthermore, since a high differential pressure is generated due to a long differential pressure section, smooth cooling water circulation is impossible. .

In particular, the problem that the coolant does not flow smoothly lowers the ion filtering efficiency of the coolant extremely, and thus, the electric conductivity does not drop quickly at the initial start of the vehicle, thus preventing the leakage current problem from being fundamentally solved.

Therefore, the present invention has been invented to solve the above problems, and is composed of a structure that can reduce the differential pressure caused by the ion resin layer, the cooling water can pass smoothly, thereby maximizing the ion filtering effect An object of the present invention is to provide an ion filter structure capable of fundamentally eliminating the problem of electric conductivity, stack current leakage, and electrical safety.

In order to achieve the above object, the present invention, the housing having an inlet port and an outlet port, and formed into a hollow type filled with an ion resin and mounted inside the housing so that the primary flow chamber inside the hollow and the inlet port A filter member in communication therewith; A secondary flow chamber communicating with the outlet port is formed in the housing to the outside of the filter member, and the coolant flowing into the primary flow chamber through the inlet port is radially passed through the filter member to filter the secondary flow chamber and the outlet port. Discharged through; The flow rate of the cooling water passage hole of the inner side of the filter member hollow to allow the cooling water of the primary flow chamber to flow into the ion resin is formed differently according to the respective positions of the cooling water flow direction of the primary flow chamber, so that the flow rate is uniform throughout the entire filter member section. Provided is a cooling water ion filter for a fuel cell vehicle, characterized in that distribution is made.

In addition, as a preferred embodiment, the size of the cooling water passage hole is formed to be large in a position close to the inlet port to increase the cooling water passage area, and the cooling water passage hole is made smaller to the opposite side to the inlet port to reduce the cooling water passage area do.

In addition, the filter member, the inner frame portion and the outer frame portion formed with a cooling water passage hole, connected by one end portion to form a double pipe structure, while forming a resin filling chamber filled with the ion resin together with the end portion A frame; A mesh network installed on inner surfaces of the inner frame part and the outer frame part to prevent the ion resin from leaking from the cooling water passage hole; An ion resin filled in the resin filling chamber between the inner frame part and the outer frame part to remove ions eluted in the cooling water; And a filter cap fixed to the other ends of the inner frame part and the outer frame part to seal the resin filling chamber and the primary flow chamber, which is an inner space of the inner frame part.

Here, the size of the cooling water passage hole formed in the inner frame portion is relatively large in a position close to the inlet port, characterized in that the size of the cooling water passage hole toward the end portion is formed smaller.

Accordingly, according to the cooling water ion filter according to the present invention, by using a hollow filter member filled with an ion resin to reduce the differential pressure generation, the cooling water is configured to pass radially through the filter member, whereby the cooling water is passed through The thickness of the ion resin layer can be reduced, thereby maximizing the ion filtering effect by smoothing the flow of cooling water.

In addition, as the ion filtering effect can be maximized, the electrical conductivity does not drop quickly, so that the leakage current of the stack current can be solved, and the driver's electrical safety is improved.

In particular, when the positive pressure of the initial start-up coolant pump is low, that is, when the supply flow rate of the coolant is low, the generation of the differential pressure can be greatly reduced as compared with the conventional ion filter, and the electrical safety at the start-up can be improved.

In addition, instead of reducing the thickness of the ion resin layer (ion filter layer), the area of the ion resin layer through which the cooling water can pass (inner circumference area of the primary flow chamber, which is hollow) can be greatly increased, thereby greatly increasing the ion filtering effect.

In addition, it is possible to optimize the thickness of the filter member to allow the cooling water to pass radially in a line that does not affect the filtering performance, thereby reducing the amount of use of the ion resin compared to the conventional, thereby reducing the production cost of the ion filter Will be. There is also a lightening effect by reducing the amount of ion resin used.

In addition, since all the sections of the filter member are filtered using ion resin, unnecessary waste of unnecessary ion resin is removed and the ion filter can be replaced at a lower cost, thereby reducing the cost of maintenance.

In addition, in the hollow ion filter of the present invention, the size of the cooling water passage hole allowing the cooling water to flow into the ion resin layer from the hollow inner surface of the filter member is differentiated according to each position of the cooling water traveling direction in the hollow, so that the filter member is equally distributed over the entire filter member section. The flow distribution is made, and the flow distribution is improved, so that the differential pressure reduction effect and the electrical conductivity reduction effect are maximized, and the ion resin filtering efficiency is increased and the replacement cycle is extended.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

6 is an exploded perspective view of the ion filter according to the embodiment of the present invention, FIG. 7 is a longitudinal sectional view of the ion filter according to the embodiment of the present invention, and FIG. 8 is a filter in the ion filter according to the embodiment of the present invention. It is a longitudinal cross-sectional view which shows the inner frame part of a member. In FIG. 6, the illustration of the ion resin is omitted.

9 is a graph showing a comparison of the pressure difference between the ion filter and the conventional ion filter according to an embodiment of the present invention, Figure 10 is a graph showing the effect of reducing the electrical conductivity in the ion filter according to an embodiment of the present invention.

The present invention relates to an ion filter for removing ions from the coolant of the fuel cell stack, and in particular, to reduce the occurrence of the differential pressure, the coolant is radially passed through the filter member using a hollow filter member filled with an ion resin. As a result, the main characteristic is to reduce the thickness of the ion resin layer through which the cooling water passes.

First, the ion filter 100 according to the present invention includes a housing 110 having an inlet port 120 through which the coolant flows into the internal space and an outlet port 130 through which the coolant is discharged, and an ion resin ( 147 is formed in a hollow form and is mounted inside the housing 110 includes an ion removal filter member 140 formed with a primary flow chamber 102 in communication with the inlet port 120 inside the hollow. It is configured by.

At this time, the secondary flow chamber 103 in communication with the outlet port 130 is formed on the outside of the filter member 140 in the housing 110, the primary flow chamber 102 through the inlet port 120 Cooling water introduced into the filter member 140 is radially passed through and filtered through the secondary flow chamber 103 and the outlet port 130.

In a preferred embodiment, the housing 110 is a filter member 140 is inserted to form an internal space through which the coolant passes, may be composed of the housing body 111 and the housing cap 112, the filter member 140 The housing cap 112 may be configured to be detachably assembled to the housing body 111 for easy replacement.

An inlet port 120 into which coolant is introduced is integrally formed at one end of the housing body 111, and an outlet port 130 is integral to the housing cap 112 assembled to the other end of the housing body 111. Is formed.

The inlet port 120 is formed at the center of one end of the housing body 111 to communicate with the primary flow chamber 102 formed inside the hollow of the filter member 140.

In addition, between the inner surface of the housing main body 111 and the outer surface of the filter member 140, the secondary flow chamber which is a space through which the coolant (cooling water from which ions are removed by the ion resin) flows through the filter member 140 ( 103 is provided, the secondary flow chamber 103 is in communication with the outlet port 130 of the housing cap 112.

The housing cap 112 is a component that seals the inner space of the housing main body 111, and is manufactured in a flange shape having an outlet port 130 formed at the center thereof, and is provided at an end of the housing main body 111 for easy detachability. It is to be fixed to the formed flange by a fastening means such as a screw.

Meanwhile, in the present invention, the filter member 140 has a cylindrical shape and has a hollow portion (primary flow chamber) through which the coolant is first introduced from the inlet port 120, and has a cylindrical shape, and the filter frame 141. ), Mesh nets 145 and 146, ion resin 147, and filter cap 149 as main components.

The filter frame 141 includes an inner frame portion 142 and an outer frame portion 143 having coolant passage holes 142a and 143a formed therein. In this case, the inner frame portion 142 and the outer frame portion 143 are formed. Are respectively spaced apart from the inside and outside to form a double tube structure connected and fixed by one end portion 144 to form a resin charging chamber in which the ion resin 147 is filled together with the end portion 144. .

The filter frame 141 as described above is a frame formed in a double pipe structure by the inner frame part 142 and the outer frame part 143 spaced apart on the same axis, and the inner frame part 142 and the outer frame part 143 are The spaced space to be formed becomes a resin charging chamber in which the ion resin 147 is filled.

In addition, the inner frame part 142 and the outer frame part 143 are formed with cooling water passage holes 142a and 143a elongated in the longitudinal direction, and the circumferential direction of the inner frame part 142 and the outer frame part 143. A plurality are installed at regular intervals along the way.

As described above, in forming the cooling water passage holes 142a and 143a in the inner frame part 142 and the outer frame part 143 of the filter frame 141, the ion filter 100 of the present invention has the following characteristics. have.

First, the cooling water passage hole 143a of the outer frame part 143 has a structure formed long along the outer direction of the outer frame part. For example, as shown in the illustrated embodiment, the outer frame part 143 at each circumferentially spaced interval. 2) Cooling water passage holes 143a each formed long along the longitudinal direction are arranged on one straight line at predetermined intervals.

Then, in the ion filter 100 of the present invention configured to radially pass the filter member 140 through the inlet port 120 to the primary flow chamber 102, which is a hollow portion, the inner frame portion 142 The cooling water passage hole 142a is an inlet-side hole in which the coolant introduced into the primary flow chamber 102 flows into the ion resin layer inside the filter member 140, and the filter member 140 in the primary flow chamber 102. ) Is a hole through which the coolant flowing radially is distributed.

Therefore, the coolant passage hole 142a of the inner frame part 142 has a structure in which the coolant flowing into the primary flow chamber 102 can be evenly distributed over the entire lengthwise direction of the filter member 140 and pass through the filter member. In addition, the cooling water should be a structure that can flow through the flow distribution as evenly as possible over the entire longitudinal section of the primary flow chamber (102).

Improving flow distribution in the primary flow chamber 102 is to distribute the cooling water flow rate through the ion resin layer evenly in the entire ion resin layer, thereby improving the pressure drop, that is, the occurrence of the differential pressure, and at the same time, evenly using the entire ion resin.

If the flow rate of the cooling water flowing into the ion resin layer through the cooling water passage hole 142a of the inner frame part 142 is not distributed evenly over the entire longitudinal section of the primary flow chamber 102, the differential pressure increases and There are problems such as reduced efficiency of ion resin filtering (Ion resin is not used evenly but mainly on one side) and shortened replacement cycle.

Therefore, in order to distribute the flow rate of the cooling water radially through the filter member 140, the inner frame which is the hollow inner surface of the filter member 140 in which the cooling water of the primary flow chamber 102 is distributed and introduced into the ion resin. In the part 142, the size of the coolant passage hole 142a is differentiated along the direction of the coolant flow in the primary flow chamber 102 to vary the coolant passage area.

That is, as shown in Figure 8, the position closer to the inlet port 120 in the inner frame portion 142, the larger the size of the cooling water passage hole (142a) to increase the cooling water passage area, the opposite end of the closed portion (below end Towards), the cooling water passage hole 142a is made smaller in size to reduce the cooling water passage area.

If the size of the coolant passage hole 142a in the inner frame portion 142 is not different along the cooling water traveling direction (inner frame portion longitudinal direction), similarly to the coolant passage hole 143a of the outer frame portion 143. When the coolant flowing from the inlet port 120 into the primary flow chamber 102 proceeds and flows in the longitudinal direction of the primary flow chamber, the closer to the blocked portion by the inertia, the more the coolant passage flow rate will be. In this case, the flow rate of cooling water will not be distributed evenly over the entire length of the primary flow chamber 102.

Therefore, in the ion filter 100 of the present invention, the size of the coolant passage hole 142a in the inner frame part 142 is such that the coolant passage flow rate is evenly distributed over the entire section of the primary flow chamber 102. Differentiate along the longitudinal direction of the secondary and primary flow chambers, but as the above is closer to the inlet side (the side where the coolant flows in) of the primary flow chamber 102, the coolant passage hole 142a increases in size to pass through the coolant. The larger the area, the farther from the inlet side, i.e., the closer to the blocked portion, the smaller the size of the cooling water passage hole 142a is, thereby making the cooling water passage area smaller.

In a preferred embodiment, the cooling water passage hole 142a of the inner frame portion 142 is formed in the same width as shown in the long direction along the longitudinal direction of the inner frame portion is arranged on one straight line at each position of the circumferential constant interval When formed so as to lengthen the length of the coolant passage hole 142a closer to the inlet side and shorter the farther away, it is possible to differentiate the length along the inner frame portion length direction.

In this case, when the size of the cooling water passage hole 142a and the cooling water passage area are increased closer to the inlet side, and smaller, the cooling water passage hole 142a is made larger, when the cooling water proceeds in the longitudinal direction in the primary flow chamber 102 by inertia. It is possible to evenly pass through the filter member 140 and the ion resin layer therein over the entire lengthwise section.

On the other hand, the end of the end portion 144 is a portion to connect the inner and outer frame portion 142 and the outer frame portion 143 integrally to form a resin filling chamber, the center of the end portion 144 The opening is a hollow part that becomes the inside of the inner frame part 142, that is, an inlet through which the coolant flows into the primary flow chamber 102.

In a preferred embodiment, the inlet port 148 communicating with the primary flow chamber 102 is formed to protrude in the center of the end portion 144, the inlet port 148 of the filter frame 141 is a housing The main body 111 is inserted into and coupled to the cylindrical port insertion portion 113 protruding to communicate with the inlet port 120.

As a result, the inlet port 148 of the filter frame 141 is inserted into and coupled to the port inserting portion 113 of the housing 110 so that the primary flow chamber 102 of the inlet port 120 and the filter frame 141 is connected. It is a structure that communicates in a straight line, the cooling water introduced through the inlet port 120 can pass radially through the filter member 140 via the primary flow chamber (102).

Preferably, the O-ring 114 is interposed between the port insertion portion 113 and the inlet port 148 to prevent the coolant from leaking into the secondary flow chamber 103.

In addition, the mesh nets 145 and 146 are respectively provided on the inner surfaces of the inner frame part 142 and the outer frame part 143 to support the ion resin 147 so that the state of charge is maintained, and the cooling water passage holes 142a and 143a. ) To prevent the ion resin from leaking.

The mesh nets 145 and 146 are for preventing the ion resin 147 from leaking to the outside through the coolant through holes 142a and 143a of the inner frame part 142 and the outer frame part 143. While keeping the ion resin 147 made of small grain particles in the resin filling chamber.

The ion resin 147 is filled in the resin filling chamber, which is spaced inside the space between the inner frame part 142 and the outer frame part 143 to remove ions eluted in the cooling water, and the filter cap 149 is It is fixed to the other ends of the inner frame portion 142 and the outer frame portion 143 to seal the resin filling chamber and the hollow portion, that is, the inner space of the inner frame portion 142, one end of the primary flow chamber 102. do.

In order to facilitate the replacement of the ion resin 147 in the preferred embodiment, the filter cap 149 is detachably assembled to the filter frame 141, for example, a structure assembled to the screw frame and the filter frame 141. It may be provided as.

At this time, the thread is machined on the inner circumferential surface of the end of the outer frame portion 143 and the outer circumferential surface of the filter cap 149 inserted therein so that the filter cap 149 is screwed to the outer frame portion 143 to be fixed.

Of course, it is also possible to thread the filter cap 149 to the outer circumferential surface of the outer frame portion 143 by machining a thread on the outer circumferential surface of the outer frame portion 143 end and the inner circumferential surface of the filter cap 149 that is in contact with it.

Meanwhile, in the ion filter 100 according to the present invention, the coolant flowing into the primary flow chamber 102 through the inlet port 120 radially passes through the filter member 140 to the secondary flow chamber 103. The cooling water, which is moved and the ions are removed from the secondary flow chamber 103, flows through the inner wall surface of the housing body 111 and is discharged through the outlet port 130 formed in the housing cap 112.

In order for the coolant to radially pass through the filter member 140 to be discharged through the outlet port 130, the secondary flow chamber 103 must communicate with the outlet port 130, and thus, the inside of the housing cap 112. A plurality of protrusions 115 are formed on the side to fix and support the filter member 140, and the cooling water passes through the protrusions 115 and spaced apart from the protrusions 115.

Thus, the space between the protrusions 115 to form a cooling water passage communicating with the outlet port 130, whereby the cooling water of the secondary flow chamber 103 passes through the cooling water passage between the protrusions 115 to the outlet port 130 It will be discharged through.

In this way, the ion filter 100 of the present invention using the hollow filter member 140 filled with the ion resin 147, after the coolant flows into the primary flow chamber 102 of the hollow filter member It is characterized by passing through 140 radially, the thickness of the filter member through which the coolant passes, that is, the thickness of the ion resin layer (differential pressure section) can be reduced in a line that does not affect the filtering performance, The use of unnecessary ion resins that do not contribute can be reduced.

In addition, since the thickness of the ion resin layer, which is a differential pressure section, is significantly reduced as compared with the conventional ion filter, the generation of cooling water differential pressure can be greatly reduced. Referring to FIG. 9, the positive pressure of the cooling water pump is low, that is, the supply flow rate of cooling water is low. It can be seen that the generation of the differential pressure can be greatly reduced compared to the conventional ion filter.

In addition, it can be seen that the occurrence of the differential pressure (pressure drop) is greatly reduced so that the flow rate can be significantly increased in the case of the present invention at the same differential pressure reference.

In particular, when the structure of the filter member 140 is hollowed out to significantly reduce the differential pressure, the flow of the coolant into the ion filter can be smoothly flowed, which can increase the filtering efficiency and quickly reduce the electrical conductivity of the coolant. As a result, it is possible to improve the conventional problem in which the initial electric conductivity of the startup is low.

In addition, instead of reducing the thickness of the ion resin layer, the area of the ion resin layer through which the cooling water can pass (inner circumference of the primary flow chamber, which is a hollow part) is greatly increased, thereby greatly increasing the ion filtering effect.

In addition, since the rotation speed of the cooling water pump is low at the initial start-up, the positive pressure of the pump is low, which causes a problem in that the cooling water does not flow to the ion filter. However, in the present invention, a differential pressure is generated when the cooling water supply flow rate is low. Since it can be greatly reduced, it is possible to secure the electrical safety of the initial driver.

9 shows an ion filter in which the size of the coolant passage hole 142a is not differentiated from the inner frame portion 142 along the longitudinal direction of the inner frame portion, and the coolant passage hole of the inner frame portion is the outer frame portion 143. Like the cooling water passage hole (143a) of the) is an example formed in the same size without the differential. As shown, it can be seen that the differential pressure generation is further reduced in the ion filter of the present invention in which the size of the cooling water passage hole is differentiated along the longitudinal direction of the inner frame part.

10 is a view showing the effect of reducing the electrical conductivity when using the conventional ion filter, the ion filter of the comparative example, the ion filter of the present invention, the initial ion by applying the same ion resin, the same pump pressure, the same number of facilities The measured time from the conductivity of 120μS / cm to less than 1μS / cm is shown.

As shown in FIG. 10, it can be seen that the ion filter according to the present invention improves the electric pressure reduction effect as well as the differential pressure improving effect, and the time taken to reach an electric conductivity of less than 1 μS / cm is compared with the conventional ion filter. Compared to the ion filter of the example was found to be significantly shortened.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited to the above-described embodiments, and various modifications of those skilled in the art using the basic concepts of the present invention defined in the following claims and Improved forms are also included in the scope of the present invention.

1 is a schematic diagram illustrating a coolant loop of a fuel cell vehicle.

2 is a perspective view illustrating a conventional coolant ion filter for a fuel cell vehicle.

3 is a longitudinal sectional view showing a conventional coolant ion filter for a fuel cell vehicle.

4 is a view showing a differential pressure section in a conventional fuel cell vehicle coolant ion filter.

5 is a graph showing an increase in the differential pressure according to the increase in the cooling water flow rate in the conventional ion filter.

6 is an exploded perspective view of an ion filter according to an embodiment of the present invention.

7 is a longitudinal sectional view of an ion filter according to an embodiment of the present invention.

8 is a longitudinal sectional view showing the inner frame portion of the filter member in the ion filter according to the embodiment of the present invention.

9 is a graph showing a comparison of the pressure difference between the ion filter and the conventional ion filter according to an embodiment of the present invention.

10 is a view showing the effect of reducing the electrical conductivity when using the conventional ion filter, the ion filter of the comparative example, the ion filter of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: ion filter 102: primary flow chamber

103: secondary flow chamber 110: housing

120: inlet port 130: outlet port

140: filter member 150: screw

Claims (9)

A housing having an inlet port and an outlet port, and a filter member formed in a hollow shape filled with an ion resin and mounted inside the housing so that a primary flow chamber inside the hollow communicates with the inlet port; A secondary flow chamber communicating with the outlet port is formed in the housing to the outside of the filter member, and the coolant flowing into the primary flow chamber through the inlet port is radially passed through the filter member to filter the secondary flow chamber and the outlet port. Discharged through; The flow rate of the cooling water passage hole of the inner side of the filter member hollow to allow the cooling water of the primary flow chamber to flow into the ion resin is formed differently according to the respective positions of the cooling water flow direction of the primary flow chamber, so that the flow rate is uniform throughout the entire filter member section. Cooling water ion filter for a fuel cell vehicle, characterized in that the distribution is made. The method according to claim 1, The coolant passage hole is formed at a position close to the inlet port to increase the cooling water passage area, and toward the opposite side of the inlet port to make the cooling water passage hole smaller, thereby reducing the cooling water passage area. filter. The method according to claim 1, The filter member, An inner frame portion and an outer frame portion having a cooling water passage hole formed therein, the filter frame forming a resin charging chamber in which an ion resin is filled together with the end portion while forming a double tube structure; A mesh network installed on inner surfaces of the inner frame part and the outer frame part to prevent the ion resin from leaking from the cooling water passage hole; An ion resin filled in the resin filling chamber between the inner frame part and the outer frame part to remove ions eluted in the cooling water; A filter cap fixed to the other ends of the inner frame part and the outer frame part to seal the resin filling chamber and the primary flow chamber which is an inner space of the inner frame part; Cooling water ion filter for a fuel cell vehicle comprising a. The method of claim 3, Cooling water ion filter for a fuel cell vehicle, characterized in that the size of the coolant through-hole formed in the inner frame portion relatively formed in a position close to the inlet port and the size of the coolant through-hole toward the end portion is reduced. The method of claim 3, Cooling water ion filter for a fuel cell vehicle, characterized in that the filter cap is detachably assembled to the filter frame by screwing for easy replacement of the ion resin. The method of claim 3, Cooling water ion filter for a fuel cell vehicle, characterized in that the center of the end portion is opened to form an inlet for the coolant flows into the primary flow chamber. The method according to claim 6, An inflow port communicating with the primary flow chamber is formed to protrude in the center of the end portion, and the inflow port is inserted into and coupled to the port insertion portion protruding to communicate with the inlet port of the housing, between the inflow port and the port insertion portion. Cooling water ion filter for a fuel cell vehicle, characterized in that the O-ring is interposed. The method according to claim 1, The housing is composed of a housing body in which an inlet port is formed and a filter member is inserted, and a housing cap in which an outlet port is formed and seals the housing body. Cooling water ion filter for a fuel cell vehicle, characterized in that the housing cap is detachably assembled to the housing body for easy replacement of the filter member. The method according to claim 8, The inner surface of the housing cap is formed with a projection for fixing and supporting the filter member, the coolant ion filter for a fuel cell vehicle, characterized in that the cooling water passage for communicating the secondary flow chamber and the outlet port is formed between the projection.

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