KR20080062783A - Oven - Google Patents

Abstract

An oven is provided to form an air passage in a manipulating part or a control panel so that a cooling function is smoothly performed in the oven. A manipulating part is provided in the form of a square board having a predetermined thickness. The manipulating part includes a front surface cover(320), a manipulating plate(340), a PCB(Printed Circuit Board)(350), and a rear surface cover(330). The front surface cover forms an outer portion of a front surface, an upper surface, and a bottom surface. The manipulating part is mounted on the rear surface of the front cover, and includes a plurality of components. A micro-chip(352) is mounted on the PCB. The PCB electrically couples a plurality of components with each other. The rear surface cover forms the outer portion of the rear surface of the manipulating part. An air introducing port(360) is provided inside the manipulating part to introduce air into the manipulating part.

Description

Oven {Oven}

1 is a perspective view showing the appearance of the oven according to the present invention.

Figure 2 is a front view showing a front open state of the oven according to the present invention.

Figure 3 is a perspective view showing an operation unit or a control panel of the main configuration of the oven according to the present invention.

Figure 4 is an exploded perspective view showing the internal configuration of the operation unit or the control panel of the main configuration of the oven according to the present invention.

5 is a perspective view showing an air flow path of the oven according to the present invention;

Explanation of symbols on the main parts of the drawings

100. Outer case 110. Cavity

112. Grooves 120. Convection

122. Convection fan 130. Outside air intake

200. Door 210. Viewing window

220. Door handle 300. Control panel

310. Control panel case 320. Front cover

321. Operation knob 322. Operation button

323. Knob through hole 324. Button through hole

325. Liquid crystal opening 326. Liquid crystal

330. Rear cover 340. Mounting plate

350. PC 360. Inlet

370. Inlet filter 400. Control panel

500. Inlet

The present invention relates to an oven, and more particularly, to an oven provided with an operation unit or a control panel capable of introducing external air.

In general, the oven is a kitchen appliance that cooks food by heating food, and has recently been changed and developed in various forms, and performs a more complex function.

Such ovens are roughly classified into gas ovens and electric ovens according to the type of heat source. The gas oven uses gas as a fuel, and by supplying gas to a plurality of burners and igniting, the air in the space where food is accommodated is heated by a flame generated by burning the supplied gas. Unlike a gas oven, while a plurality of heaters are operated using electricity as a heat source, the heater takes a manner of heating a space in which food is accommodated by heat emitted from the heater.

Electric ovens are faster than gas ovens, have a higher thermal efficiency, and are more stable.

The oven is provided with a cavity that provides a space for food to be accommodated and cooked, the food being accommodated in the interior space of the cavity, the cavity containing the food being shielded, and then the interior space of the cavity heated to cook the food by the warmed air. do.

In addition, the front of the oven is formed with a control unit for the user can operate the oven to cook food using the oven. The control unit has a predetermined thickness and is formed in a shape of a long rectangular plate in the horizontal direction, the control unit is provided with a push button and an operation knob to allow the user to cook food from the outside.

The control panel forming the exterior of the control unit is formed of one plate member having a predetermined thickness, and the control panel is mounted on the front of the oven to form a part of the exterior of the oven.

At this time, the outside air is sucked into the space between the lower end of the control panel and the upper end of the door that opens and closes the front of the oven, and the control unit is cooled by the sucked air.

However, the following problems occur in the oven according to the prior art as described above.

The oven according to the prior art has a plurality of electrical components are located on the rear side of the control panel formed of a plate member having a predetermined thickness, the plurality of electrical components are cooled by air sucked into the space between the lower end of the control panel and the door do.

As such, a problem arises in that the intake air does not smoothly cool a plurality of electrical components located at the rear side of the control panel. The cooling of the electrical components is not smooth, causing damage to the electrical components, or malfunction of the electrical components.

Therefore, a problem arises in that the use of expensive electrical components that can withstand the electrical components at high temperatures, and the expensive electrical components cause a problem of lowering the price competitiveness of the product.

In addition, the cooling of the electrical components is not smooth, there is a problem that a separate component for cooling the electrical component is provided, if a separate component is provided a problem that the cost of the product rises, As the component is required to be mounted, a problem arises that the assembly process of the product is added.

As the assembly process of the product is added, there is a problem that the productivity is reduced, and a separate component is mounted, thereby causing a problem that the design according to the securing of space for the component arrangement must be changed.

The present invention has been proposed to solve the above problems, an object of the present invention is to provide an oven in which an air flow path is formed in the inner space of the control panel or the control panel.

Another object of the present invention is to provide an operation unit or a control panel capable of smooth cooling of the internal space.

Oven according to the present invention for achieving the above object, the cavity in which food is cooked; A door located in front of the cavity; An operation unit mounted on one side of the door, for inputting information by a user; An operation unit case forming an appearance of the operation unit; And an inlet formed on at least one surface of the operation unit case and being a passage through which external air flows into the inside.

The inner side of the operation unit case, the filter is included in the air flowing through the inlet to filter the foreign matter flowing to the inside of the operation unit case.

The inlet is located on the far side and / or on the near side with respect to the door.

In another aspect, an oven according to the present invention includes a cavity; A control panel for inputting information for cooking food in the cavity and showing a degree of cooking of food; And an inlet formed on at least one surface of the control panel to allow external air to flow into the internal space of the oven.

The control panel includes a filter for filtering foreign substances contained in the air flowing through the inlet.

A membrane is further formed to block the fluid flowing through the inlet.

According to the oven by this invention comprised in this way, there exists an advantage that the cooling of a control panel becomes smooth.

Hereinafter, an electric oven will be described, for example, in a configuration in which the technical idea of the present invention is implemented.

1 is a perspective view showing the appearance of the oven according to the present invention, Figure 2 is a front view showing an open state of the door of the oven according to the present invention. Looking at the configuration of the oven with reference to the illustrated figure, the oven is formed in the shape of a rectangular parallelepiped forming an internal space as a whole.

The oven is provided with an outer case 100 forming an outer shape, and a part of the front surface of the outer case 100 is formed to be opened to be able to draw in and take out food. The opened part of the front of the outer case 100 is selectively opened and closed by the door 200. The door 200 is formed in the shape of a square plate having a predetermined thickness, the central portion of the door 200 is a viewing window 210 so that the user can check the cooking state of the food accommodated in the internal space of the oven from the outside Is formed.

The see-through window 210 is formed in a substantially rectangular shape, and mainly used glass specially treated to withstand high temperatures. On the upper side of the viewing window 210 formed on the front of the door 200, when the user wants to open the front of the oven, a door handle 220 for holding the door 200 protrudes forward.

The door handle 220 is formed to protrude forward from the front of the door 200 to be easily gripped by the user. The rear edge of the door 200 is provided with a gasket (not shown) to prevent the fluid from leaking while contacting the front of the oven.

The gasket (not shown) prevents the air heated by being heated inside the oven from leaking to the outside space of the oven. That is, the gasket is located between the front of the oven and the rear of the door 200 to prevent the movement of the fluid to prevent the hot air formed in the internal space of the oven to leak into the external space of the oven, Cold air formed in the outer space of the to prevent the flow into the inner space of the oven.

The door 200 is fastened by a hinge so that a rear lower end thereof can rotate with both lower ends of the front sides of the outer case 100. The door 200 fastened by the hinge is rotated about the hinge as the rotation center. Therefore, when the user wants to cook food using the oven, the door handle 220 is rotated downward while pulling the door 200 forward.

After the user removes the cooked food from the oven, the door handle 220 is gripped and pushed backward while the door 200 is rotated upward so that the rear of the door 200 and the front of the outer case 100 come into contact with each other. A portion of the front surface of the opened outer case 100 is shielded.

A cavity 110 is provided inside the outer case 100 to provide a space where food is cooked, and the cavity 110 is fastened or integrally formed with each sheet having a predetermined thickness. It forms a space. That is, the inside of the outer case 100 is provided with a cavity 110 for providing a space for the food is cooked by integrally or respectively fastening a sheet having a predetermined thickness.

The front surface of the cavity 110 is opened to form a space in which food is introduced or drawn out, and the front surface of the opened cavity 110 is opened and closed by the door 200.

An upper side of the door 200 is spaced apart from the upper surface of the door 200 at a predetermined interval, and an operation unit 300 for allowing a user to operate the oven is installed. The operation unit 300 includes an operation unit case 310 for forming an appearance of the operation unit 300, an operation knob 321 and an operation button 322 for the user to operate the oven, an oven state, cooking time, and cooking. The display unit 326 for displaying the temperature and the like is included.

The operation unit case 310 forms the front and side appearance of the operation unit 300, and forms part of the front and side appearance of the oven. The operation part case 310 is formed in a rectangular plate shape having a predetermined thickness in the horizontal direction, and the rear of the operation part case 310 is formed with an electrical equipment chamber (not shown) in which a plurality of electrical components are mounted.

The front of the operation unit case 310 is provided with a plurality of operation knobs 321 for operating the oven by the user to rotate the movement. The operation knob 321 is formed in a cylindrical shape having a predetermined diameter is positioned so that the upper surface facing forward.

The right side of the operation knob 321 is provided with a plurality of the operation button 322 to operate the oven by pressing the user to the rear. The display unit 326 is provided on the right side of the operation button 322. The display unit 326 displays an operating temperature, an operating time, a type of cooking, a cooking method, and the like of the oven in digital symbols and pictures so that the user can recognize it from outside.

The user may know the cooking degree and cooking temperature of the food, information on the cooking method, etc. by the digital sign and the picture displayed on the display unit 326.

Looking at the electric oven in detail with reference to Figure 2, the inner space of the outer case 100 is formed with a cavity 110 for providing a space for cooking food, the convex portion 120 on the rear of the cavity (110). Is provided.

The convection part 120 is provided to force convection of air in the cavity 110, and the convection part 120 sucks and discharges the air inside the cavity 110 by a rotational motion. ) Is provided, and the air sucked by the rotation of the convection fan 122 flows to the outside of the convection unit 120 to be discharged into the interior space of the cavity 110.

That is, when the convection fan 122 positioned in the rear center portion of the cavity 110 rotates, the internal air of the cavity 110 flows to the center portion of the convection fan 122 so that the convection unit 120 flows. ) Is sucked into the interior. The air sucked into the convection part 120 is discharged to the outside of the convection fan 122 by the rotational movement of the convection fan 122 and flows to the outside of the convection part 120 to be rearward along the cavity 110 side. In the flow forward in the front, the air flowing forward is forced to the convection as it flows back to the center portion of the convection fan (122).

Grooves 112 are formed at both sides of the air diffuser cavity 110 to support both ends of a rack (not shown) in which food is supported. The groove 112 is composed of a plurality of layers so that the rack (not shown) can be located at various locations according to the shape of the food for cooking.

The outside air inlet 130, which is a passage through which outside air is sucked, is formed above the upper front end of the cavity 110.

An outside air suction opening 130 that is a passage that flows into the interior of the electric compartment formed at the rear side of the operation unit 300 is formed. The outside air suction opening 130 is formed to have a predetermined area so that external cold air passes through the front of the outer case 100 and flows into the inner space of the electrical equipment room.

The outside air suction opening 130 may be formed to be elongated in a horizontal direction in one cut shape, and may be formed in a plurality of cut shapes as shown.

That is, when the door 200 shields the front part of the cavity 110, the upper surface of the door 200 and the lower surface of the operation part case 310 are spaced apart from each other to have a predetermined interval. Outside cold air formed in front of the 200 is sucked into the inner space of the outer case 100 through the outside air suction opening 130.

The outside cold air sucked into the inner space of the outer case 100 through the outside air inlet 130 flows through the space between the inner surface of the outer case 100 and the outer surface of the cavity 110 and the cavity 110. To form an air layer to prevent the heat transmitted from being transferred to the outer case (100).

In addition, an insulator and an insulator are filled in the space between the outer surface of the cavity 110 and the inner surface of the outer case 100 to prevent heat transferred from the cavity 110 to the outer case 100.

On the other hand, the rear of the operation unit case 310, in other words, in the inner space of the outer case 100 is equipped with a blowing fan for generating a suction force so that the cold air is sucked into the outside air intake port 130, the outside air intake port 130 External cold air is sucked in through), and the sucked cold air flows into the space between the inner surface of the outer case 100 and the outer surface of the cavity 110 to form an air layer for thermal insulation.

3 is an enlarged perspective view showing a part of the oven according to the present invention. The operation unit 300 will be described in detail with reference to the drawings. In the operation part case 310 forming the external shape of the operation part 300, an inlet 360, which is a passage through which external cold air flows into the internal space of the operation part case 310, is formed.

The inlet 360 is formed on at least one surface of the operation unit case 310, and is formed in a plurality of circular shapes having a predetermined diameter so that external cold air can flow into the internal space of the operation unit case 310.

The inlet 360 may be formed in a plurality of circles, and may be any shape through which air can pass. For example, it is possible to be formed in a long slit shape on at least one surface of the operation unit case 310.

Hereinafter, an example in which the inlet 360 is formed to have a plurality of circles will be described.

The operation unit case 310 is positioned at the upper end of the front case of the outer case 100, and a plurality of inlets 360 having a predetermined diameter is disposed on the upper surface of the operation unit case 310 in the length direction of the operation unit case 310. Is formed. The inlet 360 is a passage through which external cold air flows into the internal space of the operation unit case 310, and external cold air passing through the inlet 360 flows into the internal space of the operation unit case 310. Cooling the plurality of electrical components mounted on the rear and rear of the operation unit case 310.

A plurality of electrical components are mounted on the rear and rear sides of the operation unit case 310. Such a plurality of electrical components are cooled by the external cold air flowing through the inlet 360 to prevent the temperature rise of the electrical components.

Outside cold air flowing into the inner space of the operation unit 300 through the inlet 360 flows to the rear of the operation unit 300 to space between the inner surface of the outer case 100 and the outer surface of the cavity 110. While flowing to form an air layer. Due to this air layer, the heat transferred from the cavity 110 is not transferred to the outer case 100 as it is.

In addition, the space in which the air layer is formed is filled with insulation and heat insulating material to prevent the heat of the cavity 110 from being transferred to the outside of the outer case 100 once more. The inlet 360 may be formed on the side and bottom of the operation unit case 310, of course.

4 is an exploded perspective view showing the configuration of the oven operation unit according to the present invention. Looking at the operation unit with reference to the illustrated figure, the operation unit 300 is formed in a rectangular plate shape having a predetermined thickness as a whole. The operation unit 300 is a front cover 320 to form the front, top, and bottom of the appearance, the mounting plate 340 is mounted to the rear of the front cover 320, a plurality of parts are fastened, the mounting plate ( Located at the rear side of the 340, and electrically coupled to a plurality of components, the microchip 352, etc. are equipped with the PCB (PCB, 350), the rear cover 330 to form a rear appearance of the operation unit 300 includes It is configured.

The front cover 320 is formed in a generally "방" shape when viewed from the left side, a knob through hole 311 and a button through hole through which the operation knob 321 and the operation button 322 pass through 312 is formed, and the liquid crystal opening 313 through which the liquid crystal for displaying cooking information of the oven in digital symbols and pictures is formed in the center portion. Since the liquid crystal is exposed to the outside through the liquid crystal opening 313, the user may identify cooking information of the oven from the outside.

In addition, the upper surface of the front cover 320 is formed with an inlet port 360 which is a passage through which external cold air flows into the inside of the operation unit 300, and the inlet hole 360 has a plurality of circular shapes having a predetermined diameter. It is formed in a hole shape.

In other words, the lower side of the inlet 360, the inlet filter 370 for filtering the foreign matter contained in the external cold air introduced through the inlet 360, the lower surface of the front cover 320 is mounted. The inlet filter 370 filters foreign matters when external cold air flows into the internal space of the operation unit 300 through the inlet 360, so that foreign substances do not flow into the internal space of the operation unit 300, and thus a plurality of electric fields are introduced. Foreign matter is adsorbed on the part, or malfunction due to the flow of foreign matter is prevented.

The mounting plate 340 has a predetermined thickness and is formed in a shape of a long rectangular plate in the horizontal direction, the operation button 322 and the operation button penetrating through the button through hole 324 and the knob through hole 323 Knob 321 is mounted. In addition, the display plate 326 is mounted on the mounting plate 340 to fix the front surface of the display unit 326 to the outside through the liquid crystal opening 325.

The PCB 350 is positioned at the rear side of the mounting plate 340. The PC 350 is an abbreviation of a printed circuit board, and is formed in a shape of a square plate having a predetermined thickness, and the desired circuit wiring is drawn on the square plate, and a position at which each electronic component is fastened is formed. When each electronic component is fastened in the correct position, each electronic component is formed to be electrically connected.

The PC 350 is equipped with a microchip 352, and when each operation component is operated, it calculates and controls the operation of the oven. That is, when the operation button 322 and the operation knob 321 is operated by the user, a signal is transmitted along the circuit wiring electrically connected from the PC 350, the signal is transmitted to the microchip 352 It is calculated at to control the operation of the oven.

The rear cover 330 is formed at the rear side of the PC 350 to form a rear appearance of the operation unit 300. The rear cover 330 is formed in a rectangular plate shape having a predetermined thickness, the outside of the cold air flowing into the inner space of the operation unit 300 through the inlet 360 in the lower half of the rear cover 330 Is cooled to a predetermined width so as to form an air outlet for cooling the plurality of electric components mounted inside the operation unit 300 and then flowing backward.

Therefore, the outside cold air introduced through the inlet hole 360 formed on the upper surface of the front cover 320 passes the inlet filter 370, and the foreign matter is filtered out, and the outside cold air filtered by the foreign material is downward. While cooling to the plurality of electrical components mounted on the rear of the front cover 320 is cooled.

The external cold air that cools the plurality of electric parts while flowing downward flows back to the rear side, and flows to the rear of the operation unit 300 along an ablation portion formed at the lower end of the rear cover 330.

As the flow of air is repeated, when the food is cooked using the oven, a plurality of electric parts mounted inside the operation unit 300 are continuously cooled.

Therefore, when the user operates the oven to cook food, cold air outside flows between the upper surface of the door 200 and the lower surface of the operation unit 300 to open the outer case 100 through the outside air suction opening 130. ) Flows into the inside of the control unit 300 through the inlet opening 360 formed on the upper surface of the control unit 300 and then cools a plurality of electrical components and flows to the rear of the control unit 300. To the inside of the outer case (100).

Hereinafter, look at the control panel of the oven according to the present invention from another aspect.

It is provided with a control panel 400 is mounted to the front upper end of the oven for inputting the cooking information of the food, etc., at least one side of the control panel 400 is cold air outside the outer case 100 It is configured to include an inlet 500 that flows into the interior space.

The control panel 400 has a predetermined thickness and is formed in a shape of a long rectangular plate in a horizontal direction, and a front surface is provided with an operation button 322 and an operation knob 321 for directly inputting cooking information by a user. . In addition, the front of the control panel 400 is provided with a liquid crystal 326 that allows the user to recognize the state of the food is cooked from the outside, the cooking process, cooking time and the like.

Therefore, the user operates the oven to cook food using the operation knob 321 and the operation button 322, and the oven operated by the user cooks the food.

In this case, the user may recognize the operation state of the oven, the cooking method of the food, the cooking time, etc. by the digital symbol or the picture displayed on the liquid crystal 326.

In addition, an inlet 500 is formed on the top surface of the control panel 400 in which cold air formed in the outside of the oven flows into the inner space of the control panel 400. External cold air flowing into the interior space of the control panel 400 through the inlet 500 cools a plurality of electrical components mounted in the interior space of the control panel 400 and then rears the control panel 400. Flows into the internal space of the oven.

The inner space of the control panel 400 is further provided with a filter for filtering foreign matter contained in the cold air outside the oven introduced through the inlet 500. Since foreign matter is filtered by the filter, only clean air flows into the inside of the outer case 100, thereby preventing a plurality of electrical components from malfunctioning by the foreign matter.

On the other hand, in the inner space of the control panel 400, when the oven is not used is further formed a blocking film for blocking the fluid flowing through the inlet 500. The blocking film blocks the fluid flowing through the inlet 500 when the oven is not operated or when the internal space of the control panel 400 is unnecessary.

The blocking film is mounted to selectively shield the inlet 500. When the food is cooked using the oven by the blocking membrane, the blocking membrane opens the inlet 500 to form a flow path so that external cold air flows into the internal space of the control panel 400. When not in use, the blocking film shields the inlet 500 to prevent foreign substances from flowing to the internal space of the control panel 400.

Hereinafter will be described the operation of the oven according to the present invention configured as described above.

In order to cook food using an oven, the user grips the door handle 220 formed on the front of the door 200 to rotate downward while pulling the door 200 forward. As such, when the door 200 is rotated downward while pulling the door 200 forward, the front surface of the cavity 110 formed in the inner space of the outer case 100 is opened.

When the front surface of the cavity 110 is opened, the food is accommodated in the cavity 110 through the opened front surface of the cavity 110, and after the food is accommodated in the cavity 110, the user receives the food. The door 200 is rotated upward by holding the door handle 220, and the front door 200 which is opened by the rear of the door 200 is compressed by pressing the door 200 which is rotated upward. To shield.

When the front surface of the cavity 110 is shielded, the inside of the cavity 110 is heated, and the air heated in the cavity 110 cooks food contained in the cavity 110.

At this time, cold air outside the oven is sucked into the outer case 100 into a space between the upper surface of the door 200 and the lower surface of the control panel 400 when viewed from the operation unit 300 or the other side. External cold air sucked into the outer case 100 forms an air layer for thermal insulation between the outer surface of the cavity 110 and the inner surface of the outer case 100.

Outside cold air sucked into the outer case 100 is introduced into the inner space of the outer case 100 through the outside air inlet 130.

In addition, when viewed from the control panel 300 or the other side of the control panel 400, the inlet 360 or other through which the outside cold air flows so that the outside cold air flows into the inner space of the outer case 100 When viewed from the side, the inlet 500 is formed.

External cold air introduced into the manipulation unit 300 or the control panel 400 through the inlet 360 or the inlet 500 is an internal space of the manipulation unit case 310 or the control panel 400. It cools the heat generated by many of the electrical components mounted on it.

The outside cold air that cools the heat generated from the plurality of electrical components flows into the inner space of the outer case 100 and is formed in the cavity 110 by forming an insulating air layer between the outer surfaces of the cavity 110. The heat will be prevented from being transferred to the outside of the outer case (100).

That is, the outside cold air introduced into the inner space of the outer case 100 is introduced through the outside air inlet 130 and the inlet 360 or the inlet 500 to the inner space of the outer case 100. Will flow.

The present invention as described above is merely one embodiment of the present invention, not limited to the invention as described. Therefore, the scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

For example, the inlet 360 or the inlet 500 is not formed in a circular shape having a predetermined diameter, but is formed long along the upper surface of the operation unit case 310 or the control panel 400 in the horizontal direction. It will also be possible.

Looking at the configuration of the present invention as described above, in the present invention, the outside cold air flowing into the interior of the outer case is a passage introduced into the gap between the door and the operation unit or the control panel, and the operation unit case or control The upper surface of the panel to form a passage for the external cold air flows in.

Therefore, the amount of external cold air flowing into the outer case is increased, thereby sufficiently cooling the heat generated in the cavity.

In addition, it is possible to minimize the gap between the upper surface of the door and the operation unit or the control panel, or to eliminate the gap according to the optimum design, thereby improving the front design.

In addition, in the oven according to the present invention, flow paths through which external cold air is sucked are formed in two directions, thereby making it possible to form various flow paths in the inner space of the outer case.

In addition, a larger amount of cold outside air flows into the inner space of the outer case to cool a plurality of electrical components, thereby preventing malfunction of electrical components and increasing the life of electrical components.

On the other hand, since the cooling of the electrical component is smooth, there is an effect of not having to install the electrical component resistant to heat, and there is an effect that a separate cooling device for cooling the electrical component is unnecessary.

In this way, the heat-resistant electrical component is not mounted, and there is no need for a separate cooling device, so that the cost of the product is low, and the design of the internal structure is also smoothed.

Claims (6)

Cavity in which food is cooked; A door located in front of the cavity; An operation unit mounted on one side of the oven door and inputting information by a user; An operation unit case forming an appearance of the operation unit; And The oven is formed on at least one surface of the operation unit case includes an inlet which is a passage through which the outside air is introduced. The method of claim 1, Inside the operation unit case, the oven includes a filter for filtering foreign substances contained in the air flowing through the inlet. The method of claim 1, The inlet being located on the far side and / or the near side with respect to the door. Cavity; A control panel for inputting information for cooking food in the cavity and showing cooking information of food; And It is formed on at least one surface of the control panel, the oven includes an inlet for introducing outside air into the interior space of the oven. The method of claim 4, wherein the control panel, Oven including a filter for filtering foreign matter contained in the air flowing through the inlet. The method of claim 4, wherein And an additional membrane to selectively block the flow of fluid flowing through the inlet.

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