JP4551250B2 - Drainage device - Google Patents

Description

  The present invention relates to a drainage device for draining a liquid from each liquid storage tank in which two liquid storage tanks installed at the same horizontal position are connected in series by a connecting pipe.

  For example, in a drain device of a heat pump type hot water heater using natural refrigerant, as shown in FIG. 4, the tank is generally formed in a cylindrical shape in order to ensure pressure resistance. When trying to secure the required amount of hot water storage, the degree of freedom of the shape of the hot water storage tank is impaired, so two hot water storage tanks installed at the same horizontal position are connected in series with a connecting pipe, 101 and 102 are A hot water storage tank 103 for storing heated hot water 103 is a connecting pipe that connects the lower part of the hot water storage tank 101 and the upper part of the hot water storage tank 102.

  A water supply pipe 104 supplies water to the lower portion of the rear hot water storage tank 102 and supplies water to the hot water mixing valve 105 via a mixing water supply pipe 106. 107 hot water is supplied from the upper portion of the front hot water storage tank 101 to the hot water mixing valve. A hot water mixing pipe 105 for supplying hot water, and a hot water mixing valve 105 mixes water from the mixing water supply pipe 106 with hot water from the mixing hot water pipe 107 to supply hot water having a predetermined temperature into the room. A hot water supply pipe 109 is a relief valve having one end connected to the mixing hot water supply pipe 107 and the other end open to the atmosphere, and 110 is a drain pipe having one end connected to the bottom of the hot water storage tank 101 and the other end open. A drain valve 111 is provided in the middle of the pipe.

  112 is a drain pipe having one end connected to the bottom of the hot water storage tank 102 at the rear and the other end being open, and a drain valve 113 is provided in the middle of the pipe, 114 is a heat pump unit, and one end is the hot water storage tank 102 at the rear. Water at the bottom of the hot water storage tank 102 is supplied from a water supply pipe 115 connected to the bottom, and heat is exchanged in the heat pump unit 114 to form hot water. The hot water is connected to the upper part of the front hot water storage tank 101 at one end. From the hot water storage tank 101.

Next, the drain operation of this drain device will be described.
First, in order to drain the hot water storage tank 101 in front, when the drain valve 111 is opened and the relief valve 109 is opened, air flows into the hot water storage tank 101 from the relief valve 109 and the liquid in the hot water storage tank 101 from the drain pipe 110. Is drained.

  Then, after the liquid in the hot water storage tank 101 is completely drained, when the drain valve 113 is opened to drain the hot water storage tank 102 at the rear, air passes from the relief valve 109 through the hot water storage tank 101 and further. It passes through the connecting pipe 103 and flows into the hot water storage tank 102, whereby the liquid in the hot water storage tank 102 is drained from the drain pipe 112.

  When the drain valve 111 and the drain valve 113 are opened at the same time, the liquid in the hot water storage tank 101 is first drained from the drain pipe 110, the liquid level in the hot water storage tank 101 is lowered, and the liquid in the hot water storage tank 101 is reduced. When the difference between the water level and the liquid level in the hot water storage tank 102 increases, the liquid in the hot water storage tank 101 stops draining from the drain pipe 110, and the liquid in the hot water storage tank 102 drains from the drain pipe 112, When the liquid level in the hot water storage tank 102 becomes low and the difference between the liquid water level in the hot water storage tank 101 and the liquid water level in the hot water storage tank 102 becomes small, the liquid in the hot water storage tank 102 is drained from the drain pipe 112. The liquid in the hot water storage tank 101 is drained from the drain pipe 110, and the liquid in the hot water storage tank 101 and the liquid in the hot water storage tank 102 are completely drained. It is intended to repeat this behavior.

  In addition, when the drain pipe 110 on the downstream side of the drain valve 111 and the drain pipe 112 on the downstream side of the drain valve 113 are merged into one drain pipe, the above-described drain operation is performed.

JP 05-322317 A

  By the way, in this conventional one, two drain valves are used, but in order to reduce the number of parts, as shown in FIG. The drainage pipe 110 is connected, the drainage pipe 112 is connected to the other one, the common drainage pipe 118 is attached to the other one, the drainage valve 117 is operated, and the liquid in the hot water storage tank 101 and the liquid in the hot water storage tank 102 are connected. The thing which drains simultaneously can be considered.

  However, in this case, when the front hot water storage tank 101 is in a state immediately before being emptied, the liquid flowing from the hot water storage tank 101 to the drain pipe 110 due to drainage from the rear hot water storage tank 102 does not flow to the drain valve 117, and the drain pipe 110 flows back to the connecting pipe 103.

  Due to the liquid flowing back from the drain pipe 110 to the connection pipe 103, it passes through the empty hot water storage tank 101 from the relief valve 109, and it becomes difficult for air to flow into the upper part of the hot water storage tank 102 through the connection pipe 103. As a result, there is a problem that it takes time until the amount of liquid flowing out from the hot water storage tank 102 through the drain pipe 112 and the drain valve 117 to the common drain pipe 118 becomes small and the hot water storage tank 102 becomes empty.

  Therefore, in order to solve the above-mentioned problems, the present invention provides that in claim 1, the other end of the first drain pipe of the first hot water storage tank is connected to one of the connection ports, and the second connection port is connected to one of the other connection ports. The other end of the second drainage pipe of the hot water storage tank is connected, one end of the common drainage pipe is connected to one of the remaining connection ports, and a water passage is formed inside the valve body with connection ports on three sides. A cap formed with a hollow portion smaller than the inner diameter of the water passage portion of the valve body at the connection port to which the second drain pipe of the valve body of the drain valve composed of the valve body rotating in the valve body is connected. It is attached.

  Further, in the drainage device according to claim 2, the structure is particularly configured such that the other end of the first drain pipe of the first hot water storage tank is connected to one of the first hot water storage connection ports to one of the connection ports, One end of the second drainage pipe of the second hot water storage tank is connected to one of the connection ports, one end of the common drainage pipe is connected to one of the remaining connection ports, and a valve body provided with connection ports on three sides, A drainage valve is formed that has a water passage inside and is a valve body that rotates within the valve body. The drainage valve is located in the direction of the end of the joint drainage pipe due to the head difference between the height of the drainage valve and the tip of the joint drainage pipe. The suction force that pulls the drainage is always greater than the suction force that pulls the drainage from the connecting pipe due to the negative pressure in the space generated in the upper part of the second hot water storage tank. The height of the joint drain pipe tip is a predetermined height from the height of the drain valve Provided with low, the connection ports the second water discharge pipe of the valve body is connected, it is prepared by attaching the cap to form a smaller hollow portion than the inner diameter of the water passing portion of the valve body.

  According to the first aspect of the present invention, the other end of the first drain pipe of the first hot water storage tank is connected to one of the connection ports, and the second drainage of the second hot water storage tank is connected to one of the other connection ports. The other end of the pipe is connected, one end of the common drain pipe is connected to one of the remaining connection ports, and a water passage is formed inside the valve body with connection ports on each of the three sides. Since a cap with a hollow portion smaller than the inner diameter of the water passage portion of the valve body is attached to the connection port to which the second drain pipe of the valve body of the drain valve made of the valve body is connected, drain operation During the operation, there is always a suction force that pulls the drainage in the direction of the end of the joint drainage pipe due to the head difference between the height of the drainage valve and the height of the joint drainage pipe. Pulling the drainage from the connecting pipe due to negative pressure in the hot water storage tank Always greater than the suction force, thereby draining the second of the hot water storage tank is also smoothly, in which all liquid discharge completion time is the shortest.

According to the drainage device of the second aspect of the present invention, the other end of the first drain pipe of the first hot water storage tank is connected to one of the first hot water storage connection ports to one of the connection ports. The other end of the second drainage pipe of the second hot water storage tank is connected to one of the connection ports, one end of the common drainage pipe is connected to one of the remaining connection ports, and the valve body is provided with connection ports on three sides. And a drain valve made of a valve body that forms a water passage inside and rotates within the valve body, and the direction of the tip of the common drain pipe depends on the head difference between the height of the drain valve and the height of the tip of the joint drain pipe. So that the suction force for pulling the drainage liquid is always larger than the suction force for pulling the drainage liquid from the connecting pipe due to the negative pressure in the space generated in the upper part of the second hot water storage tank. The height of the joint drain pipe tip is a predetermined height higher than the drain valve height. When a drainage operation is performed, a cap formed with a hollow portion smaller than the inner diameter of the water passage portion of the valve body is attached to the connection port to which the second drain pipe of the valve body is connected. The suction force that pulls the drainage in the direction of the end of the common drain pipe due to the head difference between the height of the drain valve and the height of the common drain pipe always creates a negative pressure in the space inside the hot water storage tank at the rear. This always increases the suction force that pulls the drained liquid from the connecting pipe to the inside of the hot water storage tank, whereby the second hot water storage tank is smoothly drained and the total drainage completion time is minimized.

  Also, if the head difference between the height of the drainage valve and the height of the joint drainage pipe cannot be taken large, reduce the inner diameter of the hollow part of the cap attached to the connection port to which the second drainage pipe of the valve body is connected. The total drainage completion time can be adjusted to the shortest according to the head difference between the height of the drainage valve and the height of the joint drainage pipe.

Next, an embodiment of the present invention will be described with reference to the drawings.
In addition, description is abbreviate | omitted about the same structure as a prior art.
In the present invention, as shown in FIG. 1, reference numeral 1 denotes a drain valve by a three-way valve, a valve main body 2 provided with connection ports on three sides, and a substantially spherical valve body that rotates in the valve main body 2. It consists of three.

  The valve body 2 includes a first tank connection port 4 connected to one end of the drain pipe 110 of the hot water storage tank 101, a second tank connection port 5 connected to one end of the drain pipe 112 of the hot water storage tank 102, A drain pipe connection port 6 connected to one end of the drain pipe 118 is provided in three directions in a substantially T shape, and each connection port is electrically connected in a substantially T shape in the valve body 2.

  The valve body 3 is provided with a substantially T-shaped water passage 7 therein, has a rotation axis A in the vertical direction, and rotates about the rotation axis A, thereby connecting the first tank. The port 4, the second tank connection port 5, and the drain pipe connection port 6 become fully conductive or completely closed at the same time. The water passage 7 is connected to the first tank connection port 4 side and the second tank connection. The water passage portions on the side of the mouth 5 and the side drain pipe connection port 6 side are provided with the same diameter, and in this embodiment, the diameter of the water passage portion is 12 mm.

  In addition, the front end portion of the common drain pipe 118 is bent downward in front of the front end, and the height of the front end of the common drain pipe 118 is set lower than the height of the drain valve 1 by a predetermined height so that a predetermined head difference is obtained. In this embodiment, the head difference is 30 mm.

  Reference numeral 8 denotes a cap having a substantially T-shaped cross section attached to the second tank connection port 5, and the inner diameter of the water passage portion on the first tank connection port 4 side, the drain pipe connection port 6 side, and the second tank connection port 5 side. It has a hollow portion 9 smaller than the diameter, and in this embodiment, the diameter of the water passing portion on the first tank connection port 4 side, the drain pipe connection port 6 side, and the second tank connection port 5 side is 12 mm. The inner diameter of 9 is 9 mm.

Next, the draining operation of the draining apparatus of the present embodiment will be described.
First, in order to drain the liquid in the hot water storage tank 101 and the hot water storage tank 102, the valve body 3 of the drain valve 1 is rotated, and the first tank connection port 4, the second tank connection port 5 and the drain pipe connection port 6 are simultaneously connected. From the fully closed state to the fully conductive state, air flows into the hot water storage tank 101 from the relief valve 109 opened to the atmosphere.

  Thereby, first, the liquid in the hot water storage tank 101 passes through the drain valve 1 from the drain pipe 110 and is drained from the tip of the joint drain pipe 118, and the water level of the liquid in the hot water storage tank 101 is lowered.

  When the difference between the liquid level in the hot water storage tank 101 and the liquid level in the rear hot water storage tank 102 becomes larger than a predetermined level, the liquid in the hot water storage tank 101 is drained. Also, the drainage pipe 112 passes through the drainage valve 1 and is drained from the tip of the common drainage pipe 118, and the liquid level in the hot water storage tank 102 is lowered.

  When the difference between the liquid level in the hot water storage tank 101 and the liquid level in the rear hot water storage tank 102 becomes smaller than a predetermined level, only the liquid in the hot water storage tank 101 is drained, and the liquid in the hot water storage tank 101 is returned again. This operation is repeated as the difference between the water level and the water level of the liquid in the hot water storage tank 102 at the rear increases.

  When the drainage operation of this drainage device is performed, the suction force B that pulls the drainage in the direction of the end of the joint drainage pipe 118 due to the head difference between the height of the drainage valve 1 and the height of the tip of the joint drainage pipe 118 is always applied. The suction force C for pulling the drainage from the connecting pipe 103 to the inside of the hot water storage tank 102 due to the negative pressure in the space formed in the upper part of the rear hot water storage tank 102 is always larger, and the total drainage completion time is then reached. The head difference between the height of the drain valve 1 and the height of the tip of the common drain pipe 118, the first tank connection port 4 side and the drain pipe connection port 6 side passage of the water passage portion 7 of the valve body 3 so as to be the shortest. The diameter of the water portion and the smaller inner diameter of the hollow portion 9 of the cap 8 on the second tank connection port 5 side are determined.

  As described above, in the present invention, when the drainage operation is performed, the suction force B that pulls the drainage in the distal direction of the joint drainage pipe 118 due to the head difference between the height of the drainage valve 1 and the height of the tip of the joint drainage pipe 118 is always obtained. The height of the drain valve 1 and the joint drainage are always larger than the suction force C that pulls the drainage from the connecting pipe 103 to the inside of the hot water storage tank 102 due to the negative pressure in the space generated in the upper part of the rear hot water storage tank 102. The head difference in the height of the tip of the pipe 118, the diameter of the first tank connection port 4 side and the drainage pipe connection port 6 side of the water passage 7 of the valve body 3, and the second tank connection port 5 smaller than that. Since the inner diameter of the hollow portion 9 of the cap 8 on the side is determined, when the front hot water storage tank 101 is in a state immediately before it is emptied, the drainage from the rear hot water storage tank 102 is drained from the hot water storage tank 101 to the drain pipe 110. flowed The body smoothly flows from the drain pipe 110 to the joint drain pipe 118 without flowing back to the connecting pipe 103, passes through the empty hot water storage tank 101 from the relief valve 109, and passes through the connecting pipe 103 to the upper part in the hot water storage tank 102. Air flows in smoothly, thereby smoothly flowing from the hot water storage tank 102 through the drain pipe 112 and the drain valve 1 to the common drain pipe 118, and draining in the shortest time until the hot water storage tank 102 becomes empty. It is something that can be done.

  At this time, if the head difference between the height of the drainage valve 1 and the height of the tip of the common drainage pipe 118 is increased, the first tank connection port 4 side of the water passage 7 of the valve body 3 and the drainage pipe connection port 6 The difference between the diameter of the side water passage portion and the inner diameter of the hollow portion 9 of the cap 8 on the side of the second tank connection port 5 smaller than that becomes smaller, and conversely, the height of the drain valve 1 and the height of the tip of the common drain pipe 118 are reduced. When the head difference is reduced, the diameter of the water passage portion on the first tank connection port 4 side and the drain pipe connection port 6 side of the water passage 7 of the valve body 3 and the smaller cap on the second tank connection port 5 side are smaller. Since the difference between the inner diameters of the hollow portions 9 is increased, the suction force B that pulls the drainage in the direction of the distal end of the common drain pipe 118 is always greater than the suction force C that pulls the drainage in the hot water storage tank 102 from the connection pipe 103. It will be bigger.

  Therefore, if the head difference between the height of the drainage valve 1 and the height of the tip of the common drainage pipe 118 is made much larger, the first tank connection port 4 side and the drainage pipe connection port 6 side of the water passage 7 of the valve body 3 will be described. Even if the inner diameter of the hollow portion 9 of the cap 8 on the side of the second tank connection port 5 smaller than the diameter of the water passage portion is the same, the suction force B that pulls the drainage in the direction of the distal end of the common drain pipe 118 is The suction force C is always larger than the suction force C that pulls the drainage in the hot water storage tank 102, and the drainage can be performed in the shortest time.

Sectional drawing of the drain valve of one Embodiment of this invention. Schematic of the conventional drainage apparatus. Schematic of the drainage apparatus of this invention and other conventional embodiments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drain valve 2 Valve body 3 Valve body 4 1st tank connection port 5 2nd tank connection port 6 Drain pipe connection port 7 Water flow part 8 Cap 9 Hollow part

Claims (2)

A first hot water tank connected to one end of a relief valve opened to the upper side and connected to one end of the first drain pipe below, and a connecting pipe connected to the drain pipe of the first hot water tank. A second hot water storage tank whose other end is connected to the upper side and one end of the second drain pipe is connected to the lower side, a valve main body provided with connection ports on three sides, and a water passage portion formed therein, and the valve main body The other end of the first drain pipe is connected to one of the connection ports, the other end of the second drain pipe is connected to one of the other connection ports, and the remaining connections A drain valve comprising a three-way valve with one end of a common drain pipe connected to one of the ports, and the valve body rotates to drain the first hot water tank and the second hot water tank at the same time. In the liquid device, the water flow of the valve body is connected to the connection port to which the second drain pipe of the valve body of the drain valve is connected. Drainage device, characterized in that fitted with caps form smaller hollow portion than the inner diameter of the. A first hot water tank connected to one end of a relief valve opened to the upper side and connected to one end of the first drain pipe below, and a connecting pipe connected to the drain pipe of the first hot water tank. A second hot water storage tank having the other end connected to the upper side and a lower end connected to one end of the second drain pipe, a valve main body provided with connection ports on three sides, and a water passage portion formed therein, The other end of the first drain pipe is connected to one of the connection ports, the other end of the second drain pipe is connected to one of the other connection ports, and the remaining connections A drain valve comprising a three-way valve with one end of a common drain pipe connected to one of the ports, and the valve body is rotated to drain the first hot water tank and the second hot water tank at the same time. In the liquid device, the joint drainage pipe has a head difference between the height of the drainage valve and the height of the tip of the joint drainage pipe. The suction force that pulls the drainage in the end direction is always greater than the suction force that pulls the drainage in the second hot water storage tank from the connection pipe due to the negative pressure in the space generated in the upper part of the second hot water storage tank. As described above, the height of the joint drain pipe is lower than the drain valve by a predetermined height, and the inner diameter of the water passage of the valve body is connected to the connection port to which the second drain pipe of the valve body is connected. A drainage device, wherein a cap having a smaller hollow portion is attached.

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