Warm seat for fishing

Abstract

The present invention relates to a heating seat for fishing. The invention comprises: an oil burner that generates a flame as oil is burned; a water tank that is detachably mounted on the oil burner and in which water filled inside is heated by the flame of the oil burner; a tube-embedded seat having a tube inside; a circulation tube unit that connects the water tank and the tube-embedded seat and causes hot water heated in the water tank to circulate through the tube of the tube-embedded seat; a thermoelectric unit that is mounted on the lower surface of the water tank and generates electricity by the flame of the oil burner; and a tank pressure control unit that pumps air using the electrical energy generated by the thermoelectric unit to maintain the internal pressure of the oil tank of the oil burner at a set pressure. According to the present invention, a fisherman can continuously supply heat at a desired temperature, allowing the fisherman to enjoy fishing in a comfortable state in cold outdoor conditions, and can also uniformly and continuously maintain the tube-embedded seat placed on the fishing chair at a set temperature.

Description

Technology Field

[0001] The present invention relates to a heating sheet for fishing. Background Technology

[0002] When night fishing in spring and autumn or fishing in the winter, portable heaters using disposable butane gas are used to withstand the cold and keep the body warm. However, since portable heaters are very small and have low thermal efficiency, it is difficult to feel warmth or heat unless they are placed close to the user's body, and they cause waste due to used butane gas canisters.

[0003] Korean Patent Publication No. 10-2022-0058289 (published on May 9, 2022) (hereinafter referred to as the prior art) discloses a heated fishing chair using a mobile phone auxiliary battery.

[0004] However, prior art uses a mobile phone power bank to heat the heating wires wired to the seat of a fishing chair, so the amount of heat is low and it is difficult to continuously supply heat for a long time. The problem to be solved

[0005] The objective of the present invention is to provide a heating sheet for fishing that continuously supplies heat at a desired temperature, allowing the angler to enjoy fishing in a comfortable state in cold outdoor conditions.

[0006] Another objective of the present invention is to provide a fishing heating seat capable of uniformly and continuously supplying a set temperature to a fishing chair. means of solving the problem

[0007] To achieve the objective of the present invention, a heating sheet for fishing is provided, comprising: an oil burner that generates a flame as oil is burned; a water tank that is detachably mounted on the oil burner and in which water filled inside is heated by the flame of the oil burner; a tube-embedded seat having a tube inside; a circulation tube unit that connects the water tank and the tube-embedded seat and causes hot water heated in the water tank to circulate through the tube of the tube-embedded seat; a thermoelectric unit that is mounted on the lower surface of the water tank and generates electricity by the flame of the oil burner; and a tank pressure regulating unit that pumps air with the electrical energy generated by the thermoelectric unit to maintain the internal pressure of the oil tank of the oil burner at a set pressure.

[0008] The tank pressure control unit preferably includes a pressure supply pipe communicating with the interior of the oil tank, a pressure sensor mounted on one side of the pressure supply pipe to detect the internal pressure of the oil tank, an air pump connected to the pressure supply pipe to pump air into the interior of the oil tank using electrical energy generated from the thermoelectric unit, and a check valve provided in the pressure supply pipe to be positioned between the air pump and the pressure sensor. Effects of the invention

[0009] The present invention heats the water inside a water tank with the flame of an oil burner and continuously supplies the heat of the heated water from the water tank to a tube-embedded seat placed on a fishing chair, thereby continuously supplying a desired amount of heat to a fisherman sitting on the fishing chair with the tube-embedded seat. This allows the fisherman to enjoy fishing outdoors in a warm state while sitting on the fishing chair even in cold seasons such as early spring, late autumn, and winter, thereby increasing the satisfaction of the fisherman. Furthermore, the simple structure makes it convenient to carry and use.

[0010] In addition, the present invention maintains the heat of the oil burner at a set heat level, thereby uniformly maintaining the water in the water tank at a constant temperature. This allows the temperature of the tube-embedded seat placed on the fishing chair to be uniformly and continuously maintained at a set temperature, thereby increasing the reliability of the product. Brief explanation of the drawing

[0011] FIG. 1 is a perspective view illustrating an embodiment of a heating sheet for fishing according to the present invention. FIG. 2 is a front view showing the main parts of one embodiment of a heating sheet for fishing according to the present invention. FIG. 3 is a plan view illustrating an example of a heating element constituting an embodiment of a heating sheet for fishing according to the present invention. FIG. 4 is a cross-sectional view illustrating an example of a multi-functional detachable valve constituting an embodiment of a fishing heating sheet according to the present invention. FIG. 5 is a cross-sectional view showing a state in which a tank pressure regulating unit is connected to a multi-functional detachable valve constituting an embodiment of a fishing heating sheet according to the present invention. Specific details for implementing the invention

[0012] Hereinafter, an embodiment of a heating sheet for fishing according to the present invention will be described with reference to the attached drawings.

[0013] One embodiment of a heating sheet for fishing according to the present invention As illustrated in FIG. 1 and 2, it includes an oil burner (10), a water tank (20), a tube-embedded seat (30), a circulation tube unit (40), a thermoelectric unit (50), and a tank pressure control unit (60).

[0015] The oil burner (10) generates a flame as the oil burns.

[0016] As an example of an oil burner (10), the oil burner (10) comprises an oil tank (11) in which oil is filled and which is equipped with an oil injection part (not shown), a flame nozzle (12) which is mounted on the upper part of the oil tank (11) and forms a flame while spraying vaporized oil, a support (13) which is supported on the upper part of the oil tank (11), a tank pressurizing unit (14) which is equipped in the oil tank (11) and pressurizes the inside of the oil tank (11), a connecting pipe (15) which connects the oil tank (11) and the flame nozzle (12), a flame control valve (16) which is connected to the connecting pipe (15), and a cleaning cap (17) which is connected to one side of the connecting pipe (15) and cleans the inside of the connecting pipe.

[0017] The shape of the oil tank (11) can be implemented in various ways. The oil injection part consists of an injection port and a lid that opens and closes the injection port, and the lid is equipped with a safety valve (not shown) that releases pressure when there is overpressure inside the oil tank.

[0018] As an example of a firebox (12), the firebox (12) is provided with a flow path inside, and the firebox (12) includes a concave surface (2) formed in a concave curved shape as shown in FIG. 3, and a plurality of spray holes (3) formed at regular intervals in the circumferential direction on a plurality of virtual circles based on the center point of the concave surface (2). That is, the plurality of virtual circles have the same center point, and the inner diameter increases as they move away from the center point. A plurality of spray holes (3) are arranged at regular intervals in the circumferential direction on each virtual circle. It is preferable that the spray holes (3) provided on the concave surface (2) become larger in size as they move from the center point toward the edge. As a result, when the vaporized oil flowing through the flow path of the firebox (12) is sprayed through the spray holes (3) of the concave surface (2), the amount of vaporized oil sprayed through each spray hole (3) becomes uniform, thereby forming a uniform flame in a state of complete combustion.

[0019] The tank pressurization unit (14) includes a manual piston (4) penetrating one side of the oil tank (11), and pressurizes the interior of the oil tank (11), which is filled with a certain amount of oil, by reciprocating the manual piston (4) back and forth. Such a configuration is a known technology.

[0020] The connecting pipe (15) includes a vaporization preheating section (1), and preheats the vaporized oil passing through the vaporization preheating section (1) by heating the vaporization preheating section (1).

[0021] When generating a flame in the oil burner (10), the oil tank (11) is filled with a set amount of oil, and then the inside of the oil tank (11) is pressurized by pumping a set number of times with the manual piston (4) of the tank pressurization unit (14) while the fire control valve (16) is closed. Then, the vaporization preheating part (1) of the connecting pipe (15) is preheated by heating it with a heating device for a set time. When the fire control valve (16) is opened, the oil pressurized and vaporized in the oil tank (11) is preheated through the connecting pipe (15) and sprayed through the spray holes (3) of the burner (12) to burn and form a flame.

[0023] The water tank (20) is detachably mounted on the oil burner (10), and the water filled inside is heated by the flame of the oil burner (10).

[0024] As an example of a water tank (20), the water tank (20) is preferably in the shape of a cylinder with a closed bottom and an open top. That is, the water tank (20) includes a cylinder body and a bottom plate that closes the bottom of the cylinder body. The top of the water tank (20) is preferably covered by a lid (21).

[0026] The tube-embedded sheet (30) is provided with a tube (31) inside.

[0027] As an example of a tube-embedded sheet (30), the tube-embedded sheet (30) comprises a seat cover (32), a thermal insulation material (33) filled inside the seat cover (32), and a tube (31) arranged throughout the entire interior of the seat cover (32). The inlet end and the outlet end of the tube (31) are connected to a connector provided in the seat cover. Hot water heated in the water tank (20) is introduced through the inlet end of the tube (51), and water circulated inside the tube-embedded sheet (30) is discharged to the water tank (20) through the outlet end of the tube (31).

[0028] As an example of a seat cover (32), it is preferable that the seat cover be formed in a rectangular shape to cover a fishing chair.

[0030] The circulation tube unit (40) connects the water tank (20) and the tube-embedded seat (30), and is connected so that hot water heated in the water tank (20) circulates to the tube (31) of the tube-embedded seat (30). The circulation tube unit (40) includes a water pump (41) that pumps hot water so that the hot water in the water tank (20) circulates rapidly using electricity generated from the thermoelectric unit (50).

[0031] As an example of a circulation tube unit (40), the circulation tube unit (40) includes an outflow tube (42) that connects one side of the water tank (20) to one side of the tube (31) of the tube-embedded sheet (30) so that hot water from the water tank (20) flows out to the tube (31) of the tube-embedded sheet (30), an inflow tube (43) that connects the other side of the water tank (20) to the other side of the tube (31) of the tube-embedded sheet (30) so that hot water with heat loss flows into the water tank (20) by circulating through the tube (31) of the tube-embedded sheet (30), and a water pump (41) connected to one side of the outflow tube (42) to pump hot water using electricity generated from a thermoelectric unit (50).

[0032] It is preferable that a control unit (70) be mounted at the bottom of the oil burner (10). When the control unit (70) is provided at the bottom of the oil burner (10), a portion of the outflow tube (42) and the inflow tube (43) is located inside the casing of the control unit (70), and a water pump (41) is connected to a portion of the outflow tube (42) located inside the casing. A measuring unit (not shown), etc., for measuring the temperature and flow rate of hot water is provided inside the casing of the control unit (70). As an example of the measuring unit, the measuring unit includes a temperature sensor connected to the circulation tube unit (40) for measuring the temperature of the hot water and a flow meter for measuring the flow rate.

[0034] The thermoelectric unit (50) is mounted on the lower surface of the water tank (20) and generates electricity from the flame of the oil burner (10).

[0035] As an example of a thermoelectric unit (50), the thermoelectric unit (50) includes a thermoelectric element mounted on the lower surface of the water tank (20). When heat is applied to the thermoelectric element, free electrons gain energy and generate an electromotive force with that energy, and the thermoelectric element includes a TEG (Thermoelectric Generator) module. This is a known technology, so a detailed description is omitted. It is preferable that there be one or multiple thermoelectric elements.

[0037] The tank pressure regulating unit (60) pumps air using electrical energy generated from the thermoelectric unit (50) to maintain the internal pressure of the oil tank (11) of the oil burner (10) at a set pressure. That is, as the oil inside the oil tank (11) of the oil burner (10) is burned through the burner (12), the amount of oil filled inside the oil tank (11) gradually decreases, and as the empty space inside the oil tank (11) increases, the internal pressure of the oil tank (11) gradually decreases, causing the heat output to gradually weaken. The tank pressure regulating unit (60) detects the internal pressure of the oil tank (11) and, when it becomes lower than the set reference pressure, pumps air into the oil tank (11) to maintain the internal pressure of the oil tank (11) at the set reference pressure. In addition, when the internal pressure of the oil tank (11) exceeds the set pressure, it releases some pressure to maintain the internal pressure of the oil tank (11) at the set pressure.

[0038] As an example of a tank pressure control unit (60), the tank pressure control unit (60) includes a pressure supply pipe (61) communicating with the interior of an oil tank (11), a pressure sensor (62) mounted on one side of the pressure supply pipe (61) to detect the internal pressure of the oil tank (11), an air pump (63) connected to the pressure supply pipe (61) and pumping air into the interior of the oil tank (11) using electrical energy generated from a thermoelectric unit (50), and a check valve (64) provided in the pressure supply pipe (61) to be positioned between the air pump (63) and the pressure sensor (62). Meanwhile, it is preferable to further provide an exhaust valve (65) in the pressure supply pipe (61) to be positioned between the check valve (64) and the pressure sensor (62).

[0039] The check valve (64) allows the movement of gas from the air pump (63) to the oil tank (11), but blocks the movement of gas from the oil tank (11) to the air pump (63).

[0040] The pressure supply pipe (61) is connected to any location that can communicate with the interior of the oil tank (11). That is, the end of the pressure supply pipe on the side where the pressure sensor (62) is located is connected to any location in the oil tank (11).

[0041] The pressure sensor (62), air pump (63), and exhaust valve (65) are connected to the control unit (70). A heating temperature control unit (G) is connected to the control unit.

[0042] The tank pressure control unit (60) detects the internal pressure of the oil tank (11) through the pressure sensor (62), and when the internal pressure of the oil tank (11) is lower than the set pressure, the air pump (63) operates to pump air, and the compressed air being pumped is injected into the oil tank (11) through the pressure supply pipe (61) to maintain the internal pressure of the oil tank (11) at the set pressure state. Meanwhile, when the internal pressure of the oil tank (11) is higher than the set pressure, the exhaust valve (65) opens to discharge the internal pressure of the oil tank (11) to the outside, and when the internal pressure of the oil tank (11) reaches the set pressure state, the exhaust valve (65) closes to maintain the internal pressure of the oil tank (11) at the set pressure state. For example, the air pump (63) operates when the pressure detected by the pressure sensor (62) is lower than the set pressure value, and the operation continues until the internal pressure of the oil tank (11) reaches the set pressure. In another example, the air pump (63) can apply pressure into the oil tank (11) by operating periodically for a set period of time at intervals of the set oil burner (10). In this case, the pressure sensor (62) can be excluded and a timer can be added.

[0043] When the tank pressure regulating unit (60) is connected to the oil tank (11), it can be detachably connected by a multi-functional detachable valve (90). The multi-functional detachable valve (90) communicates the tank pressure regulating unit (60) with the inside of the oil tank (11) when the tank pressure regulating unit (60) is connected, and blocks the flow path so that the inside of the oil tank (11) does not communicate with the outside when the tank pressure regulating unit (60) is disconnected.

[0044] As an example of a multi-functional detachable valve (90), as shown in FIG. 4, the multi-functional detachable valve (90) comprises a valve housing (91) having a longitudinally penetrating passage inside, a valve body (92) that is movably inserted into the penetrating passage of the valve housing (91) in the longitudinal direction, a spring (93) that is provided on one side of the valve body (92) and supports the valve body (92) with elastic force, a sealing member (94) that is provided between the penetrating passage of the valve body (92) and the valve housing (91) and blocks or releases the penetrating passage according to the up-and-down movement of the valve body (92), a fastening cover (95) that is connected to surround the valve housing (91) and is fastened to a connecting part (5) provided in the oil tank (11), and a nipple (96) that is coupled to the fastening cover (95) and to which one end of the tank pressure regulating unit (60) is attached.

[0045] The connecting part (5) of the oil tank (11) is provided with a through hole on one side of the oil tank (11), protrudes vertically from the edge of the through hole, and has male screw threads on the outer surface of the protruding part.

[0046] It is preferable that a connector (66) be provided at the end of the pressure supply pipe (61) of the tank pressure control unit (60) and that the connector (66) be attached to and detached from the nipple (96).

[0047] When the multi-functional detachable valve (90) is connected to the connection part (5) of the oil tank (11), the valve housing (91) is inserted into the connection part (5) of the oil tank (11), and the fastening cover (95) is fastened to the connection part (5). In this state, with the multi-functional detachable valve (90) connected to the connection part (5) of the oil tank (11), as shown in FIG. 5, the valve body (92) is pressed upward by the elastic force of the spring (93), and the valve body (92) presses the sealing member (94), thereby causing the sealing member (94) to block the through passage, so that the inside of the oil tank (11) and the outside of the multi-functional detachable valve (90) are blocked.

[0048] When a tank pressure regulating unit (60) is connected to a multi-functional detachable valve (90), as shown in FIG. 4, the end of the pressure supply pipe (61) of the tank pressure regulating unit (60), i.e., the connector (66), is inserted into the nipple (96) of the multi-functional detachable valve (90) and mounted. When the end of the pressure supply pipe (61) is inserted into the nipple (96) of the multi-functional detachable valve (90), the end of the pressure supply pipe (61), i.e., the connector (66), pushes against the upper end of the valve body (92), thereby releasing the pressure of the sealing member (94), and the sealing member (94) is connected to the through passage so that the pressure supply pipe (61) of the tank pressure regulating unit (60) and the inside of the oil tank (11) are connected. Meanwhile, when the end of the pressure supply pipe (61) of the tank pressure control unit (60) is separated from the nipple (96) of the multi-functional detachable valve (90), the valve body (92) moves back to its original position and pressurizes the sealing member (94), thereby blocking the through passage and blocking the inside and outside of the oil tank (11).

[0050] An assembly comprising an oil burner (10), a water tank (20), a thermoelectric unit (50), a tank pressure regulating unit (60), and a control unit (70) is preferably mounted by a mounting mechanism (80). The mounting mechanism (80) includes a tripod (81), hooks (82) attached to each leg of the tripod (81), hook rings (83) spaced circumferentially on the upper outer surface of the water tank (20), and a chain (84) connecting the hooks and the hook rings.

[0052] below, The operation and effects of the heating sheet for fishing according to the present invention are explained.

[0053] First, the tube-embedded seat (30) is positioned to cover the backrest and base plate of the fishing chair (100). A mounting mechanism (80) is installed at a distance from the fishing chair (100) on which the tube-embedded seat (30) is mounted, and an assembly comprising an oil burner (10), a water tank (20), a thermoelectric unit (50), a tank pressure regulating unit (60), and a control unit (70) is mounted on the mounting mechanism (80). Next, an appropriate amount of water is filled into the water tank (20), and the oil burner (10) is operated to generate a flame through the burner (12) of the oil burner (10). The water filled in the water tank (20) is heated by the flame generated from the burner (12) of the oil burner (10), and at the same time, electrical energy is generated in the thermoelectric unit (50) by the flame of the burner (12) and supplied to the air pump (63) of the tank pressure control unit (60) and the water pump (41) of the circulation tube unit (40). As electricity is supplied to the water pump (80) and it operates, the hot water heated in the water tank (20) flows through the outflow tube (42) of the circulation tube unit (40) and is supplied to the tube (31) of the tube-embedded seat (30) covered on the fishing chair (100). The hot water supplied to the tube (31) flows through the tube (31) arranged throughout the tube-embedded seat (30) and transfers the heat of the hot water to the tube-embedded seat (30). Hot water that has passed through the tube (31) arranged throughout the tube-embedded sheet (30) is recirculated into the water tank (20) through the inlet tube (43) of the circulation tube unit (40). The water recirculated into the water tank (20) is heated in the water tank (20) by the flame of the oil burner (10) and repeatedly circulates through the above circulation path, thereby warming the tube-embedded sheet (30).Meanwhile, as the oil filled in the oil tank (11) in the oil burner (10) is continuously vaporized and burned, the empty space inside the oil tank (11) may gradually increase, and thus the heat output may be weakened. However, when the tank pressure control unit (60) detects the internal pressure of the oil tank (11) and the internal pressure of the oil tank (11) decreases, compressed air is pumped into the oil tank (11) to maintain the internal pressure of the oil tank (11) within a set pressure range, thereby maintaining the heat output in the initial heat output state.

[0054] A person who fishes sits on a tube-embedded seat (30) covered on a fishing chair (100) to fish, so they can enjoy fishing in a warm state.

[0055] If the angler (user) determines that the temperature of the tube-embedded seat (30) is low, the heating temperature control unit (G) sets the temperature high, and the air pump (63) of the tank pressure control unit (60) pumps air to inject high-pressure air into the oil tank (11), thereby increasing the internal pressure of the oil tank (11) and increasing the flame generated through the firebox (12), thereby increasing the temperature of the water tank (20) and raising the temperature of the tube-embedded seat (30). If the angler determines that the temperature of the tube-embedded seat (30) is high, the heating temperature control unit (G) sets the temperature low, and the exhaust valve (65) of the tank pressure control unit (60) releases the internal pressure of the oil tank (11), thereby lowering the internal pressure of the oil tank (11) and reducing the flame generated through the firebox (12), thereby lowering the water temperature of the water tank (20) and lowering the temperature of the tube-embedded seat (30).

[0056] When the user uses only the oil burner (10), the water tank, control unit, and tank pressure regulating unit are separated from the oil burner, and then the oil burner is used.

[0057] In this way, the present invention heats the water inside the water tank (20) with the flame of the oil burner (10) and continuously supplies the heat of the hot water heated in the water tank (20) to the tube-embedded seat (30) placed on the fishing chair (100), thereby continuously supplying a desired amount of heat to the fisherman sitting on the fishing chair (100) on which the tube-embedded seat (30) is placed. This allows the fisherman to enjoy fishing in a warm state while sitting on the fishing chair (100) outdoors even in cold seasons such as early spring, late autumn, and winter, thereby increasing the satisfaction of the fisherman. Furthermore, the structure is simple, making it convenient to carry and use.

[0058] In addition, the present invention allows the heat of the oil burner (10) to be maintained at a set heat, thereby maintaining the water in the water tank (20) at a constant temperature uniformly. This allows the temperature of the tube-embedded seat (30) placed on the fishing chair (100) to be maintained uniformly and continuously at a set temperature, thereby increasing the reliability of the product.

[0059] In addition, the present invention allows the user (fisherman) to arbitrarily adjust the temperature of the tube-embedded sheet (30), thereby increasing comfort. Explanation of the symbols

[0060] 10; oil burner 20; water tank 30; Tube-embedded seat 40; Circulation tube unit 50; Thermoelectric unit 60; Tank pressure regulating unit 70; Control unit 80; Mounting mechanism 90; Multifunctional detachable valve 100; Fishing chair

Claims

Claim 1 An oil burner that generates a flame as oil burns; a water tank detachably mounted on the oil burner, in which water filled inside is heated by the flame of the oil burner; a tube-embedded seat equipped with a tube inside; a circulation tube unit connecting the water tank and the tube-embedded seat, which causes hot water heated in the water tank to circulate through the tube of the tube-embedded seat; and a thermoelectric unit mounted on the lower surface of the water tank, which generates electricity by the flame of the oil burner. A fishing heating sheet comprising a tank pressure regulating unit that pumps air using electrical energy generated from the thermoelectric unit to maintain the internal pressure of the oil tank of the oil burner at a set pressure, wherein the tank pressure regulating unit comprises a pressure supply pipe communicating with the interior of the oil tank, a pressure sensor mounted on one side of the pressure supply pipe to detect the internal pressure of the oil tank, an air pump connected to the pressure supply pipe and pumping air into the interior of the oil tank using electrical energy generated from the thermoelectric unit, and a check valve provided in the pressure supply pipe to be positioned between the air pump and the pressure sensor. Claim 2 A heating sheet for fishing according to claim 1, wherein the oil burner comprises an oil tank filled with oil and equipped with an oil injection part, a burner mounted on the upper part of the oil tank and forming a flame while spraying vaporized oil, a support supported on the upper part of the oil tank, a tank pressurizing unit provided in the oil tank and pressurizing the interior of the oil tank, a connecting pipe connecting the tank and the burner, and a flame control valve connected to the connecting pipe, wherein the burner comprises a concave upper surface formed in a concave curved shape and a plurality of spray holes formed at regular intervals in the circumferential direction on a plurality of virtual circles based on the center point of the concave upper surface, and wherein the spray holes are characterized by gradually increasing in size from the center point toward the edge. Claim 3 delete Claim 4 A fishing heating sheet according to claim 1, characterized in that an exhaust valve is further connected to the pressure supply pipe. Claim 5 A heating sheet for fishing according to claim 1, wherein a multi-functional detachable valve is connected to the oil tank and a tank pressure regulating unit is detachably connected to the multi-functional detachable valve, and when the tank pressure regulating unit is connected to the multi-functional detachable valve, the tank pressure regulating unit communicates with the inside of the oil tank, and when the tank pressure regulating unit is separated from the multi-functional detachable valve, the multi-functional detachable valve blocks the flow path so that the inside and outside of the oil tank do not communicate. Claim 6 In claim 5, the multi-functional detachable valve comprises a valve housing having a longitudinally penetrating passage inside, a valve body inserted longitudinally so as to be movable into the penetrating passage of the valve housing, a spring provided on one side of the valve body to support the valve body with elastic force, a sealing member provided between the valve body and the penetrating passage of the valve housing to block or communicate the penetrating passage according to the up-and-down movement of the valve body, a fastening cover connected to surround the valve housing and fastened to a connecting part provided in the oil tank, and a nipple coupled to the fastening cover through which the tank pressure regulating unit is attached and detached.

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