Valve for opening / closing and food waste treatment apparatus having the same

Abstract

According to one aspect of the present invention, an opening and closing valve is provided, comprising: an upper valve housing having an inlet pipe connected to a food waste input section and having a downwardly inclined cross-section formed at the bottom; a lower valve housing coupled to the lower part of the upper valve housing to partition an internal space and having an outlet pipe located at the lower part of the inlet pipe; an opening and closing plate located in the internal space and in contact with the inclined cross-section of the inlet pipe to open and close the inclined cross-section according to linear reciprocating movement on the incline; a driving unit for reciprocating the opening and closing plate; and a proximity sensor coupled to the upper valve housing such that a sensing unit is located in the internal space and detects whether the opening and closing plate is open or closed.

Description

Technology Field

[0001] The present invention relates to an opening and closing valve and a food waste treatment device including the same. More specifically, the invention relates to an opening and closing valve and a food waste treatment device including the same that can minimize internal contamination of the opening and closing valve by preventing the sudden spreading of wastewater residue of food waste temporarily stored inside the opening and closing valve even when the opening and closing valve is opened. Background Technology

[0003] In accordance with the volume-based food waste disposal system, households in collective residential facilities such as apartments and officetels collect food waste in volume-based bags and then dispose of it at outdoor food waste collection facilities.

[0004] Problems such as foul odors and the provision of breeding conditions for pests arise during the process of collecting and disposing of food waste in volume-based bags at each household, and the smell of food waste causes inconvenience to neighboring people during the process of carrying it outdoors.

[0005] Recently, to address these issues, a centralized food waste processing method has been proposed in which a shared food waste collection facility is provided in collective residential facilities, and food waste is collected by vacuum suction from a transfer pipe connecting each household to the facility.

[0006] The centralized food waste treatment system is configured to maintain the transfer pipe at negative pressure while the opening and closing valve operates to suck in food waste and transport it to a collection facility. In this regard, the applicant has also filed a patent application for a 'food waste treatment device' and has obtained a patent registration.

[0007] However, in the case of a shut-off valve according to conventional technology, the wastewater residue of the food waste temporarily stored in the shut-off valve accumulates on the upper part of the shut-off plate placed horizontally as food waste is introduced, and there was a problem that the wastewater residue of the food waste accumulated on the shut-off plate spreads rapidly as the shut-off plate is opened, contaminating the inside of the shut-off valve.

[0008] In addition, if there is a problem with the opening and closing operation of the shut-off valve, it may cause a malfunction in the suction of food waste when suctioning food waste from the collection facility for collection. Prior art literature

[0010] Korean Registered Patent Publication No. 10-2162867 (Published on October 7, 2020) The problem to be solved

[0011] The present invention provides a food waste treatment device capable of minimizing internal contamination of the opening and closing valve by preventing the sudden spreading of wastewater residue of food waste temporarily stored inside the opening and closing valve even when the opening and closing valve is opened.

[0012] In addition, the present invention provides a food waste treatment device capable of preventing malfunction of the opening and closing valve by recognizing both ends of the opening and closing plate when the opening and closing valve is opened and determining whether the opening and closing valve is fully open or closed. means of solving the problem

[0014] According to one aspect of the present invention, an opening and closing valve is provided, comprising: an upper valve housing having an inlet pipe connected to a food waste input section and having a downwardly inclined cross-section formed at the bottom; a lower valve housing coupled to the lower part of the upper valve housing to partition an internal space and having an outlet pipe located at the lower part of the inlet pipe; an opening and closing plate located in the internal space and in contact with the inclined cross-section of the inlet pipe to open and close the inclined cross-section according to linear reciprocating movement on the incline; a driving unit for reciprocating the opening and closing plate; and a proximity sensor coupled to the upper valve housing such that a sensing unit is located in the internal space and detects whether the opening and closing plate is open or closed.

[0015] An inclined guide surface that guides the linear reciprocating motion of the opening / closing plate on an inclined plane may be formed on the bottom surface of the above-mentioned installation space.

[0016] It may further include an inclined block that is coupled to the bottom surface of the above-mentioned mounting space and, when the opening / closing plate is closed, the opening / closing plate moves up the inclined surface to raise the opening / closing plate.

[0017] It may further include a support block that is formed with an inclined surface to climb up the inclined surface of the above-mentioned inclined block and is coupled to the lower surface of the above-mentioned opening / closing plate.

[0018] The above inlet pipe may include a valve packing coupled to the outer circumference of the inclined cross section.

[0019] The above proximity sensors can be coupled to the upper valve housing in pairs, positioned respectively at one end and the other end of the opening / closing plate when the opening / closing plate is opened.

[0020] In the upper valve housing, a pair of coupling grooves may be formed, each extending to the upper ends of one and the other of the opening / closing plate, respectively, so that a sensing part of the proximity sensor is inserted and coupled thereto.

[0021] A guide projection is formed at one end of the above-mentioned opening / closing plate, and the driving unit includes a spiral spring into which the guide projection is inserted from the side end; and a driving motor coupled to one end of the spiral spring to rotate the spiral spring, wherein the guide projection can move in a straight reciprocating motion along the spiral of the spiral spring according to the rotation of the spiral spring.

[0022] The above-mentioned drive motor is located on the upper part of the upper valve housing, and a gear portion may be interposed between the motor shaft of the drive motor and one end of the spiral spring.

[0023] The above drive unit may further include a motor cover coupled to the upper valve housing so as to cover the drive motor.

[0024] It may further include a scraper that is coupled to the linear reciprocating path of the opening / closing plate so as to elastically contact one surface of the opening / closing plate, and wipes off debris from the one surface as the opening / closing plate moves linearly.

[0025] According to another aspect of the present invention, a food waste treatment device for collecting food waste by suction of air within a transfer pipe is provided, comprising: a food waste input section into which food waste is introduced; and an opening / closing valve interposed between the food waste input section and the transfer pipe to interrupt the connection between the food waste input section and the transfer pipe.

[0026] The above food waste treatment device may further include a weight measuring unit coupled to the opening / closing valve and measuring the weight of the food waste fed into the opening / closing valve. Effects of the invention

[0028] According to an embodiment of the present invention, even when the opening and closing valve is opened, the sudden spreading of wastewater residue of food waste temporarily stored inside the opening and closing valve is prevented, thereby minimizing internal contamination of the opening and closing valve and facilitating smooth scraping by a scraper.

[0029] In addition, by recognizing both ends of the opening / closing plate when the opening / closing valve is opened and determining whether the opening / closing valve is fully open or closed, malfunction of the opening / closing valve can be prevented. Brief explanation of the drawing

[0031] FIG. 1 is a simplified diagram illustrating the configuration of a food waste treatment device equipped with an opening and closing valve according to one embodiment of the present invention. FIG. 2 is a perspective view of an opening and closing valve according to one embodiment of the present invention. FIG. 3 is an exploded view of an opening and closing valve according to one embodiment of the present invention. FIG. 4 is a drawing for explaining the combined state of a proximity sensor of an opening and closing valve according to an embodiment of the present invention. FIG. 5 is a simplified cross-sectional view of an opening and closing valve according to one embodiment of the present invention. FIG. 6 is a drawing illustrating a lower valve housing of an opening and closing valve according to one embodiment of the present invention. FIGS. 7 and 8 are drawings for explaining the opening and closing process of an opening and closing valve according to an embodiment of the present invention. Specific details for implementing the invention

[0032] The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention.

[0033] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0034] Hereinafter, an opening and closing valve according to the present invention and a food waste treatment device including the same will be described in detail with reference to the attached drawings. In describing with reference to the attached drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted.

[0036] FIG. 1 is a simplified diagram illustrating the configuration of a food waste treatment device equipped with an opening and closing valve according to an embodiment of the present invention. FIG. 2 is a perspective view of an opening and closing valve according to an embodiment of the present invention, FIG. 3 is an exploded view of an opening and closing valve according to an embodiment of the present invention, and FIG. 4 is a diagram explaining the combined state of a proximity sensor of an opening and closing valve according to an embodiment of the present invention. FIG. 5 is a simplified diagram illustrating a cross-section of an opening and closing valve according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating a lower valve housing of an opening and closing valve according to an embodiment of the present invention. FIG. 7 and FIG. 8 are diagrams explaining the opening and closing process of an opening and closing valve according to an embodiment of the present invention.

[0037] FIGS. 1 to 8 illustrate a transfer pipe (2), a food waste input section (4), a lid (6), a weight measuring section (8), an opening / closing valve (10), a wastewater residue (11), an upper valve housing (12), a coupling groove section (13), a lower valve housing (14), a proximity sensor (15), an inlet pipe (16), an inclined section (17), an outlet pipe (18), a detection section (19), a motor cover (20), inclined surfaces (23, 39), an opening / closing plate (24), a guide protrusion (25), a driving section (26), a valve packing (27), a scraper (28), a driving motor (30), a gear section (32), a spiral spring (34), an inclined guide surface (36), an inclined block (38), and a support block (40).

[0038] The opening and closing valve (10) according to the present embodiment comprises: an upper valve housing (12) having an inlet pipe (16) connected to a food waste input section (4) and having a downward inclined cross-section (17) formed at the bottom; a lower valve housing (14) coupled to the lower part of the upper valve housing (12) to partition an internal space and having an outlet pipe (18) located at the lower part of the inlet pipe (16); an opening and closing plate (24) located in the internal space and in contact with the inclined cross-section (17) of the inlet pipe (16) to open and close the inclined cross-section (17) according to linear reciprocating movement on the incline; a driving unit (26) that moves the opening and closing plate (24) linearly back and forth; and a proximity sensor (15) coupled to the upper valve housing (12) so that a detection unit is located in the internal space and detects whether the opening and closing plate (24) is open or closed.

[0039] Before describing the configuration of the opening and closing valve (10) according to the present embodiment, first, with reference to FIG. 1, we will examine the food waste treatment device to which the opening and closing valve (10) is applied.

[0040] Referring to FIG. 1, the food waste treatment device according to the present embodiment is a food waste treatment device that collects food waste by sucking air into a transfer pipe (2), and includes a food waste input part (4) into which food waste is introduced; and an opening / closing valve (10) according to the present embodiment that is interposed between the food waste input part (4) and the transfer pipe (2) to interrupt the connection between the food waste input part (4) and the transfer pipe (2).

[0041] The food waste treatment device to which the opening and closing valve (10) according to the present embodiment is applied may be installed in each household of a collective residential facility, and the food waste treatment device installed in each household may be connected to a transfer pipe (2) connected to a suction device located in a central collection facility. Depending on the operation of the suction device located in the central collection facility, food waste from each household may be transferred to the collection facility.

[0042] The method of transporting food waste from one household to a central collection facility is to operate a suction device while the transport pipe of another household is closed to suck air into the transport pipe (2), thereby opening the opening / closing valve (10) of the food waste treatment device of the household and allowing the food waste of the household to move along the transport pipe (2) to the central collection facility.

[0043] When the lid (6) of the food waste input section (4) is opened and food waste is introduced in each household, the food waste moves into the opening / closing valve (10) through the inlet pipe (16). At this time, the opening / closing valve (10) is closed, and the food waste is temporarily stored inside the inlet pipe (16), which is closed by the opening / closing plate (24).

[0044] The inlet pipe (16), which has a downward inclined cross-section (17) at the bottom, is closed by an inclined opening / closing plate (24), so that the wastewater residue (11) of the temporarily stored food waste is gathered on one side below according to the inclined slope of the opening / closing plate (24).

[0045] In this state, when the opening / closing plate (24) is slid backward to open, the wastewater residue (11) accumulated on one side below is discharged directly into the discharge pipe (18) without spreading widely, so that contamination inside the opening / closing valve (10) can be minimized.

[0046] In addition, since the wastewater residue (11) of the food waste is concentrated on one side, the scraping of the opening / closing plate (24) by the scraper (28) located on the opposite side can be done well.

[0047] Meanwhile, a weight measuring unit (8) is attached to the bottom of the opening / closing valve (10) according to the present embodiment, and the weight of food waste fed into the opening / closing valve (10) through the food waste input unit (4) can be measured. Based on the weight measurement of the food waste, charges can be calculated according to the weight of the food waste processed for each household.

[0049] Hereinafter, with reference to FIGS. 2 to FIGS. 8, we will examine in detail the configuration of the opening and closing valve (10) according to the present embodiment.

[0050] The upper valve housing (12) is connected to the food waste input section (4) and has an inlet pipe (16) having a downward inclined cross-section (17) formed at the bottom.

[0051] Referring to FIGS. 2 and 3, the opening and closing valve (10) according to the present embodiment comprises a valve housing having an internal mounting space formed by the upper and lower coupling of an upper valve housing (12) and a lower valve housing (14).

[0052] An inlet pipe (16) connected to a food waste input section (4) is formed in the upper valve housing (12), and food waste introduced into the food waste input section (4) is temporarily stored inside the inlet pipe (16).

[0053] The bottom of the inlet pipe (16) is formed with a downward sloping cross-section (17), as shown in FIG. 5. By forming the bottom of the inlet pipe (16) with a downward sloping cross-section (17), when the opening / closing plate (24), which will be described later, closes the bottom, the wastewater residue (11) contained in the food waste inside the inlet pipe (16) is pushed down to one side.

[0054] A proximity sensor (15) is attached to the upper side of the upper valve housing (12) so that the detection unit detects whether the opening / closing plate (24) is opened or closed inside the mounting space. This is explained in detail below.

[0055] The lower valve housing (14) is coupled to the lower part of the upper valve housing (12) to partition the internal space, and is provided with an outlet pipe (18) located at the lower part of the inlet pipe (16).

[0056] As described above, the valve housing is configured by the upper and lower combination of the upper valve housing (12) and the lower valve housing (14), and a mounting space is provided inside the valve housing.

[0057] In the lower valve housing (14), an outlet pipe (18) is formed at a position corresponding to the lower portion of the inlet pipe (16) of the upper valve housing (12). When the opening / closing plate (24) is opened while the transfer pipe (2) is in a negative pressure state for the transfer of food waste, the food waste inside the inlet pipe (16) can be moved to the transfer pipe (2) through the outlet pipe (18).

[0058] The opening / closing plate (24) is located in the mounting space and contacts the inclined section (17) of the inlet pipe (16), and opens and closes the inclined section (17) according to linear reciprocating movement on the inlet. The upper surface of the opening / closing plate (24) is in close contact with the inclined section (17) of the inlet pipe (16), and the opening / closing plate (24) opens or closes the inclined section (17) of the inlet pipe (16) as it moves linearly on the inlet.

[0059] An elastic valve packing (27) may be attached to the outer circumference of the inclined cross-section (17) of the inlet pipe (16), in which case the opening / closing plate (24) is in close contact with the valve packing (27) of the inlet pipe (16).

[0060] An inclined guide surface (36) that guides the inclined linear reciprocating motion of the opening / closing plate (24) may be formed on the bottom surface of the mounting space formed by the lower valve housing (14).

[0061] Referring to FIGS. 5 and 6, an inclined guide surface (36) is formed on the bottom surface of the lower valve housing (14) with an inclination approximately similar to the inclination of the inclined cross-section (17) of the outlet pipe (18). With the opening / closing plate (24) placed on the inclined guide surface (36), the opening / closing plate (24) is guided to move in a straight reciprocating motion along the inclination. According to the present embodiment, the opening / closing plate (24) is configured to move along the inclined guide surface (36) without the attachment of a roller to the opening / closing plate (24).

[0062] Meanwhile, when the opening / closing plate (24) closes the inclined section (17) of the inlet pipe (16), it is necessary to strongly press the upper surface of the opening / closing plate (24) against the inclined section (17) to prevent the leakage of wastewater residue (11) of food waste.

[0063] To this end, as illustrated in FIGS. 5, 7 and 8, an inclined block (38) may be attached to the bottom surface of the mounting space at the bottom of the inlet pipe (16), and when the opening / closing plate (24) is closed, the opening / closing plate (24) may ride up the inclined surface (39) of the inclined block (38) and raise the opening / closing plate (24), thereby strongly pressing the opening / closing plate (24) against the inclined cross-section (17) of the inlet pipe (16).

[0064] According to the present embodiment, an inclined block (38) is attached at a corresponding position so that the front and rear ends of the opening / closing plate (24) can be lifted simultaneously when the opening / closing plate (24) is closed. Additionally, an inclined surface (23) is formed at the lower front end of the opening / closing plate (24) so ​​that it can easily climb up the inclined surface (39) of the inclined block (38) when closed, and a support block (40) with an inclined surface formed to climb up the inclined surface (88) of the inclined block (38) is attached at the lower part of the opening / closing plate (24) at a position corresponding to the inclined block (38) at the rear end.

[0065] FIG. 7 shows the state in which the inlet pipe (16) is opened by the opening / closing plate (24), and FIG. 8 shows the state in which the inlet pipe (16) is closed by the opening / closing plate (24). As shown in FIG. 7, when the inlet pipe (16) is opened, the opening / closing plate (24) moves backward and moves away from the inclined block (38) and along the inclined guide surface (36) of the mounting space. As shown in FIG. 8, when the inlet pipe (16) is closed, the opening / closing plate (24) moves forward along the inclined guide surface (36), and the front end of the opening / closing plate (24) rides up the inclined block (38) located at the front end, and at the same time, the support block (40) of the opening / closing plate (24) rides up the inclined block (38) at the rear end, so that the opening / closing plate (24) can be in close contact with the inclined cross-section (17) of the inlet pipe (16).

[0066] The driving unit (26) moves the opening / closing plate (24) in a linear reciprocating motion along an inclined plane. The driving unit (26) includes a driving motor (30) and drives the opening / closing plate (24) by changing the forward / reverse rotational motion of the driving motor (30) into linear reciprocating motion.

[0067] The driving unit (26) according to the present embodiment includes a spiral spring (34) into which a guide protrusion (25) is inserted at a side end; and a driving motor (30) coupled to one end of the spiral spring (34) to rotate the spiral spring (34), and is configured so that the guide protrusion (25) moves in a straight reciprocating motion along the spiral of the spiral spring (34) according to the rotation of the spiral spring (34).

[0068] As shown in FIGS. 7 and 8, a guide projection (25) protruding upward from the opening / closing plate (24) is attached to one end of the opening / closing plate (24), and the guide projection (25) of the opening / closing plate (24) is inserted into the side end of the spiral spring (34) and comes into contact with the spiral of the spiral spring (34). In this state, when the spiral spring (34) is rotated around the central axis, the guide projection (25) moves linearly along the spiral of the spiral spring (34).

[0069] As the spiral spring (34) rotates in the forward and reverse directions according to the forward and reverse rotation of the drive motor (30), the guide protrusion (25) moves in a linear reciprocating motion, and as a result, the opening and closing plate (24) can move in a linear reciprocating motion.

[0070] By using a spiral spring (34) to convert the rotational motion of the drive motor (30) into linear reciprocating motion, the total weight of the opening / closing valve (10) can be reduced, and the components can be simplified to enable the miniaturization of the opening / closing valve (10). Of course, a rack-pinion gear, a belt structure, etc., that converts rotational motion into linear reciprocating motion can be used as the drive unit.

[0071] Meanwhile, as shown in FIG. 3, in order to miniaturize the opening and closing valve (10), a driving motor (30) may be positioned on the upper part of the upper valve housing (12), and a gear part (32) may be interposed between the motor shaft of the driving motor (30) and one end of the spiral spring (34). By positioning the driving motor (30) on the upper part of the upper valve housing (12) rather than in the mounting space inside the valve housing, the overall width of the opening and closing valve (10) can be reduced, thereby enabling miniaturization.

[0072] The drive motor (30) located on the upper part of the upper valve housing (12) can be protected by being covered by a motor cover (20) that is coupled to the upper valve housing (12).

[0073] As shown in FIG. 4, the proximity sensor (15) is coupled to the upper valve housing (12) such that the sensing part (19) is positioned in the mounting space and detects whether the opening / closing plate (24) is open or closed. The proximity sensor (15) is coupled to the upper valve housing (12) so as to penetrate the upper valve housing (12), and the sensing part (19) penetrating the upper valve housing (12) detects the opening / closing plate (24) inside the mounting space and detects whether the opening / closing plate (24) is open or closed.

[0074] In this embodiment, a pair of proximity sensors (15) are coupled to the upper valve housing (12) so as to be located at one end and the other end of the opening / closing plate (24) respectively when the opening / closing plate (24) is opened.

[0075] The proximity sensor (15) detects whether the opening / closing plate (24) is fully opened by detecting the proximity between one end and the other end of the opening / closing plate (24) when the opening / closing plate (24) is fully opened.

[0076] Meanwhile, when the proximity sensor (15) is connected by penetrating the upper valve housing (12), there is a risk that moisture or wastewater residue inside the mounting space may leak out at the penetration location, so the sealing force must be increased at the penetration location to ensure proper connection.

[0077] However, in this embodiment, so that the sealing force can be connected regardless of the sealing force, a pair of connecting grooves (13) are formed in the upper valve housing (12), each extending to the upper end of one side and the other side of the opening / closing plate (24), so that the sensing part (19) of the proximity sensor (15) is inserted and connected.

[0078] The coupling groove (13) is in the form of a groove indented at the top of the upper valve housing (12) and is inserted into the coupling groove (13) at the top of the upper valve housing (12) to be coupled, thereby being spatially separated from the mounting space of the housing. However, it should be formed with an appropriate thickness so that the sensing performance of the sensing part does not decrease.

[0079] The proximity sensor (15) is a sensor capable of detecting the proximity of an object using an electromagnetic field or a magnetic field, and in this embodiment, a sensor capable of detecting a metallic opening / closing plate (24) was used.

[0080] Meanwhile, the opening / closing valve (10) according to the present embodiment may include a scraper (28) that is coupled to the linear reciprocating path of the opening / closing plate (24) so ​​as to elastically contact one surface of the opening / closing plate (24) and wipes off debris from one surface as the opening / closing plate (24) reciprocates.

[0081] Referring to FIGS. 7 and 8, the scraper (28) is in contact with the upper surface of the opening / closing plate (24) in an elastically pressed state, and the scraper (28) wipes the upper surface of the opening / closing plate (24) as the opening / closing plate (24) moves in a straight reciprocating motion.

[0082] The scraper (28) is positioned to intersect with the linear movement on the linear reciprocating path of the opening / closing plate (24), thereby removing debris from the upper surface during the linear reciprocating movement of the opening / closing plate (24).

[0083] As described above, during the closing process of the opening / closing plate (24), the upper surface of the opening / closing plate (24) moves in close contact with the scraper (28) by the inclined block (38) to wipe away any remaining debris, and during the opening process of the opening / closing plate (24), the debris on the upper surface of the opening / closing plate (24) that was in close contact with the scraper (28) is wiped away.

[0084] When the inlet pipe (16) is formed as a circular pipe, the scraper (28) can be formed in an arc shape corresponding to the curvature of the inlet pipe (16). When food waste is introduced into the inlet pipe (16), the waste adheres in a circular shape according to the cross-sectional shape of the inlet pipe (16), and by installing an arc-shaped scraper (28) with such curvature, the waste can be wiped away uniformly.

[0085] The scraper (28) is maintained in a state of being elastically pressed on one side of the opening / closing plate (24), and for this elastic pressing, an elastic spring (not shown) that presses the scraper (28) downward may be provided.

[0087] Although the present invention has been described above with reference to embodiments thereof, those skilled in the art will readily understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0089] 2: Transfer pipe 4: Food waste input section 6: Lid 8: Weight measuring part 10: Shut-off valve 11: Sewage residue 12: Upper valve housing 13: Connecting groove 14: Lower valve housing 15: Proximity sensor 16: Inlet pipe 17: Inclined section 18: Outlet pipe 19: Detector 20: Motor cover 23, 39: Inclined surface 24: Opening / closing plate 25: Guide protrusion 26: Actuator 27: Valve packing 28: Scraper 30: Drive motor 32: Gear section 34: Spiral spring 36: Inclined guide surface 38: Inclined block 40: Support block

Claims

Claim 1 An upper valve housing having an inlet pipe connected to a food waste input section and having a downwardly inclined cross-section formed at the bottom; a lower valve housing coupled to the lower part of the upper valve housing to partition an internal mounting space and having an outlet pipe located at the lower part of the inlet pipe; an opening / closing plate located in the mounting space and in contact with the inclined cross-section of the inlet pipe to open / close the inclined cross-section according to linear reciprocating movement on the incline; a driving unit for reciprocating the opening / closing plate; a proximity sensor coupled to the upper valve housing so that a sensing unit is located on the mounting space and detects whether the opening / closing plate is opened or closed; an inclined block coupled to the bottom surface of the mounting space, which causes the opening / closing plate to rise by climbing the inclined surface when the opening / closing plate is closed; and a support block coupled to the lower surface of the opening / closing plate, having an inclined surface formed to climb the inclined surface of the inclined block, wherein the proximity sensor is coupled to the upper valve housing in a pair so as to be located at one end and the other end of the opening / closing plate respectively when the opening / closing plate is opened, and the upper A valve housing has a pair of coupling grooves formed therein, each extending to the upper portion of one end and the other end of the opening / closing plate, so that a sensing portion of the proximity sensor is inserted and coupled therein, a guide projection is formed at one end of the opening / closing plate, and the driving unit comprises a spiral spring into which the guide projection is inserted at the side end; and a driving motor coupled to one end of the spiral spring to rotate the spiral spring, wherein the guide projection moves in a straight reciprocating motion along the spiral of the spiral spring according to the rotation of the spiral spring. Claim 2 An opening / closing valve according to claim 1, characterized in that an inclined guide surface is formed on the bottom surface of the above-mentioned mounting space to guide the inclined linear reciprocating motion of the above-mentioned opening / closing plate. Claim 3 delete Claim 4 delete Claim 5 In claim 1, the inlet pipe is an opening / closing valve comprising a valve packing coupled to the outer circumference of the inclined cross section. Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 An opening / closing valve according to claim 1, wherein the driving motor is located on the upper part of the upper valve housing, and a gear portion is interposed between the motor shaft of the driving motor and one end of the spiral spring. Claim 10 An opening / closing valve according to claim 9, wherein the driving unit further comprises a motor cover coupled to the upper valve housing so as to cover the driving motor. Claim 11 An opening / closing valve according to claim 1, further comprising a scraper coupled to a linear reciprocating path of the opening / closing plate so as to elastically contact one surface of the opening / closing plate, and wiping off debris from the one surface according to the linear reciprocating movement of the opening / closing plate. Claim 12 A food waste treatment device for collecting food waste by suction of air within a transfer pipe, comprising: a food waste input section into which food waste is introduced; and an opening / closing valve according to any one of claims 1, 2, 5, 9 to 11, which is interposed between the food waste input section and the transfer pipe to interrupt the connection between the food waste input section and the transfer pipe. Claim 13 A food waste treatment device according to claim 12, further comprising a weight measuring unit coupled to the opening / closing valve and measuring the weight of the food waste fed into the opening / closing valve.

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