JPWO2020161897A1 - Water heater - Google Patents

Abstract

A hot water supply device (1) that circulates and stores hot water heated by the hot water supply heat exchanger (3) to the hot water storage tank (2) by the hot water supply water pump (4), and projects outward from the hot water storage tank. It is provided with a tank connecting protrusion (9) that is attached and communicates with the inside of the hot water storage tank, and a connecting member that is arranged between the water pipe (5) connected to the hot water supply water pump and the hot water storage tank. Maintains the connection state of the pipe connection joint (10) for directly connecting the water pipe to the tank connection protrusion of the hot water storage tank, and the pipe connection joint, the tank connection protrusion, and the water pipe. The pipe connection joint has a fixing tool (14) for connecting the water pipe to one end side and a tank connecting protrusion to the other end side. Is bent so as to be located at a right angle. As a result, the water pipe can be directly connected to the hot water storage tank via the pipe connection joint bent in the right angle direction, so that it is not necessary to install a torii-shaped pipe, the occurrence of air biting can be prevented, and the installation is easy. can.

Description

The present invention relates to a hot water supply device provided with a hot water storage tank.

A hot water supply device that has a heat source machine such as a heat pump or a boiler and a hot water storage tank that stores hot water, and can store hot water in the hot water storage tank by using the heat of the heat medium heated by the heat source machine. It is known (see, for example, Patent Document 1). The hot water stored in the hot water storage tank is used for hot water supply such as showers, baths, and kitchens.

The hot water supply device of Patent Document 1 includes a compression unit unit including at least an expansion device such as a compressor and an electric expansion valve and an outdoor heat exchanger, a heat exchange unit unit including a water heater for hot water supply, a hot water storage tank, and a hot water storage tank. It is divided into a hot water storage unit unit equipped with a water pump for hot water supply. In this hot water supply device, a water pipe connection elbow, which is a joint whose pipe connection direction can be changed by 360 degrees on a surface parallel to the back surface, is attached to the back surface of the heat exchange unit portion. Further, in the hot water storage unit unit configured as an independent unit, the hot water storage tank is connected to the hot water supply water heater of the heat exchange unit unit by a water pipe provided with a hot water supply water pump and an elbow for connecting the water pipe.

Japanese Unexamined Patent Publication No. 2003-156253

By the way, in the hot water supply device, a torii-shaped pipe may be required for routing the connection pipe connecting the hot water storage tank and the hot water supply water pump depending on the installation environment. Here, the torii-shaped pipe is a refracting shape composed of two pipes standing in parallel in the direction perpendicular to the ground and a horizontal pipe connecting the upper ends of these two pipes. Means plumbing.

However, when a torii-shaped pipe is interposed in the path connecting the hot water storage tank and the water pump for hot water supply, it becomes difficult for air to flow in the torii-shaped pipe, and there is a risk that the air may accumulate in the water pipe. Then, when the air accumulated in the water pipe flows to the water pump for hot water supply, there is a problem that problems such as idling, deterioration of capacity, or generation of abnormal noise occur due to the occurrence of air biting. Therefore, the torii-shaped pipe is generally provided with an air bleeding valve, but the air bleeding becomes insufficient depending on the position where the air bleeding valve is arranged, which may lead to the same problem as described above.

Further, when the torii-shaped pipe is provided, it is difficult to form one pipe into a complicated bent shape connecting the hot water storage tank and the water pump for hot water supply by bending due to the processing restrictions of the pipe. Therefore, the refracting pipes connecting the hot water storage tank and the water pump for hot water supply are divided into at least two or more, and these pipes must be joined to each other, which is troublesome. Furthermore, it was also necessary to secure the work space required for the work of joining these pipes and the work of connecting the hot water storage tank and the hot water supply water pump using the torii-shaped pipes. From the above, it is a technology that eliminates the need to install a torii-shaped pipe in the hot water supply device, can prevent problems such as idling due to the occurrence of air biting, deterioration of capacity, or generation of abnormal noise, and can be easily installed. Was desired to be realized.

The present invention is for solving the above-mentioned problems, and an object of the present invention is to provide a hot water supply device that can prevent the occurrence of air biting and can be easily installed without the need to provide a torii-shaped pipe. do.

In the hot water supply device according to the present invention, a hot water storage tank, a hot water supply heat exchanger, and a hot water supply water pump are connected via a water pipe, and water is heated by the hot water supply heat exchanger to obtain high-temperature hot water. Is a hot water supply device that is circulated and stored in the hot water storage tank by the hot water supply water pump, and hot water is taken out from the hot water storage tank and supplied as needed. A tank connecting protrusion communicating with the inside of the hot water storage tank and a connecting member arranged between the water pipe connected to the hot water supply water pump and the hot water storage tank are provided, and the connecting member comprises the hot water storage tank. The connection state of the pipe connection joint for directly connecting the water pipe to the tank connection protrusion of the tank, the pipe connection joint, the tank connection protrusion, and the water pipe is maintained. In the pipe connection joint, the water pipe is connected to one end side and the tank connection protrusion is connected to the other end side, so that the one end side and the other end are connected. It is bent and formed so that the sides are located at right angles to each other.

According to the hot water supply device according to the present invention, the water pipe can be directly connected to the hot water storage tank via the pipe connection joint bent in the right angle direction, so that it is not necessary to provide a torii-shaped pipe and air biting is generated. It can be prevented and can be easily installed.

It is a block diagram which shows schematic structure of the hot water supply apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows typically the connection state of the hot water storage tank and the hot water supply water pump in the hot water supply apparatus of FIG. It is a perspective view which shows the connection state of the hot water storage tank and a water pipe by the pipe connection joint of FIG. 2 by disassembling. It is sectional drawing which shows the connection state of the hot water storage tank and a water pipe by the joint for connection of a pipe of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, those having the same reference numerals are the same or equivalent thereof, and they are common in the entire text of the specification. Further, in the cross-sectional view, hatching is omitted as appropriate in view of visibility. Furthermore, the forms of the components shown in the full text of the specification are merely examples and are not limited to these descriptions.

Embodiment 1.
<Structure of hot water supply device 1>
The hot water supply device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a configuration diagram schematically showing the configuration of the hot water supply device 1 according to the first embodiment of the present invention. FIG. 2 is a perspective view schematically showing a connection state between the hot water storage tank 2 and the hot water supply water pump 4 in the hot water supply device 1 of FIG. FIG. 3 is a perspective view showing the connection state between the hot water storage tank 2 and the water pipe 5 by the pipe connection joint 10 of FIG. 2 in an exploded manner. FIG. 4 is a cross-sectional view showing a connection state between the hot water storage tank 2 and the water pipe 5 by the pipe connection joint 10 of FIG.

As shown in FIGS. 1 and 2, the hot water supply device 1 has a hot water storage tank 2, a hot water supply heat exchanger 3, and a hot water supply water pump 4, which are connected via water pipes 5 and 6. A hot water supply pipe 7 connected to the hot water supply plug 7a is connected to the upper part of the hot water storage tank 2. Further, a make-up water pipe 8 connected to the water tap 8a and supplying tap water to the hot water storage tank 2 is connected to the lower part of the hot water storage tank 2. Further, a tank connecting protrusion 9 communicating with the inside of the hot water storage tank 2 is provided on the upper portion of the hot water storage tank 2 in a state of horizontally projecting toward the outside of the hot water storage tank 2. The tank connecting protrusion 9 is connected to the hot water supply water pump 4 via a pipe connecting joint 10 and a water pipe 5, which will be described later. Further, in the hot water supply device 1, the hot water supply heat exchanger 3 is connected to the outdoor unit 13 via the water pipes 11 and 12. In the case of the first embodiment, in the hot water supply device 1, the water pipe 6, the hot water supply water pump 4, the water pipe 5, and the pipe connection joint 10 are arranged in a straight line.

<Operation of hot water supply device 1>
The hot water supply device 1 sends tap water stored in the lower side of the hot water storage tank 2 via the make-up water pipe 8 to the hot water supply heat exchanger 3 via the water pipe 6 to heat the water. Next, the hot water supply device 1 sucks up the high-temperature hot water obtained by heating with the hot water supply heat exchanger 3 by the hot water supply water pump 4, and connects the water pipe 5, the pipe connection joint 10, and the tank connection protrusion 9. It is supplied to the hot water storage tank 2 via the hot water storage tank 2 and stored in the upper part of the hot water storage tank 2. In this way, in the hot water supply device 1, the process of heating the water stored in the lower side of the hot water storage tank 2 by the hot water supply heat exchanger 3 and storing the obtained hot water water in the upper side of the hot water storage tank 2 is repeated and circulated. .. Then, in the hot water supply device 1, hot water is taken out from the hot water storage tank 2 and supplied as needed.

<About connecting members>
Here, the hot water supply device 1 includes a connecting member arranged between the water pipe 5 connected to the hot water supply water pump 4 and the hot water storage tank 2. As shown in FIGS. 3 and 4, this connecting member has a pipe connecting joint 10 for directly connecting the water pipe 5 to the tank connecting protrusion 9 of the hot water storage tank 2. Further, the connecting member has a fixture 14 made of an elastic metal member for maintaining a connected state between the pipe connecting joint 10, the tank connecting protrusion 9, and the water pipe 5. That is, the connecting member includes a pipe connecting joint 10 and a fixture 14.

Specifically, the pipe connection joint 10 is composed of a hollow cylindrical pipe 10a into which the water pipe 5 and the tank connection protrusion 9 are inserted, and the end portion 5a of the water pipe 5 is inserted and connected to one end side. The first insertion portion 10b is formed. At this time, an O-ring 15 is attached to the end portion 5a of the water pipe 5. Further, the pipe connection joint 10 is formed with a second insertion portion 10c to which the end portion 9a of the tank connection protrusion 9 is inserted and connected to the other end side. At this time, an O-ring 15 is attached to the end portion 9a of the tank connecting protrusion 9. Further, the first insertion portion 10b and the second insertion portion 10c have a flange shape. The pipe connection joint 10 has an L-shaped cylindrical pipe 10a, that is, one end side on which the first insertion portion 10b is formed and the other end side on which the second insertion portion 10c is formed are located at right angles. It is bent and formed. Incidentally, the pipe connection joint 10 may be made of resin or brass.

The fixture 14 is made of an elastic member, forms an annular shape having a first annular portion 14a and a second annular portion 14b, and a groove hole 14e is formed between the end portion 14c and the end portion 14d. There is. The groove 14e is formed along the circumferential direction of the first annular portion 14a and the second annular portion 14b. The first ring portion 14a and the second ring portion 14b are formed from the end portion 14c to the end portion 14d, respectively, with different diameters in the depth direction with the groove hole 14e as a boundary. That is, the first ring portion 14a and the second ring portion 14b are on the side to be attached to the pipe connection joint 10 with the groove hole 14e as a boundary, and the end 5a of the water pipe 5 or the end of the tank connection protrusion 9. The side to be attached to the portion 9a has a different diameter.

In the case of the first embodiment, in the pipe connection joint 10, the end portion 5a of the water pipe 5 to which the O-ring 15 is attached is inserted into the first insertion portion 10b, and O is inserted into the second insertion portion 10c on the other end side. The end portion 9a of the tank connecting protrusion 9 to which the ring 15 is mounted is inserted. Then, in the state where the first insertion portion 10b and the water pipe 5 are connected to the connection portion between the first insertion portion 10b and the water pipe 5 in the pipe connection joint 10, the fixture 14 connects the connection portion. It is attached so as to be sandwiched between the first annular portion 14a and the second annular portion 14b. The fixture 14 is connected to the connection portion between the second insertion portion 10c and the tank connection protrusion 9 in the pipe connection joint 10 in a state where the second insertion portion 10c and the tank connection protrusion 9 are connected. The connecting portion is attached while being sandwiched between the first annular portion 14a and the second annular portion 14b.

At this time, the fixture 14 is expanded between the first annular portion 14a and the second annular portion 14b by elastic deformation, and is used for connecting the pipe connecting joint 10 and the water pipe 5 and for connecting the pipe. It is attached to each of the connecting portions of the joint 10 and the tank connecting protrusion 9. Then, the fixture 14 is provided between the first ring portion 14a and the second ring portion 14b for connecting the pipe connection joint 10 and the water pipe 5, and for connecting the pipe connection joint 10 and the tank. With the connecting portions with the protrusions 9 sandwiched, these connecting portions are fixed by elastic force.

The fixture 14 has a connection portion between the first insertion portion 10b and the water pipe 5 and a second insertion portion in a state where the first insertion portion 10b or the second insertion portion 10c corresponding to each groove hole 14e is fitted. It is fixed to the connecting portion between the portion 10c and the tank connecting protrusion 9. In this way, the pipe connection joint 10 can be easily held in a one-touch connection state with the water pipe 5 and the tank connection protrusion 9 by the fixture 14, and can be prevented from coming off. Since the connection between the pipe connection joint 10 and the tank connection protrusion 9 and the water pipe 5 is a one-touch connection that can be easily removed, the installation work becomes easy.

At this time, in the pipe connection joint 10, the connection with the water pipe 5 on one end side is downward in the vertical direction, and the connection with the tank connection protrusion 9 on the other end side is in the horizontal direction. The connection with the water pipe 5 may be in any direction as long as it is lower than the horizontal direction in the connection with the tank connection protrusion 9 on the other end side.

In the hot water supply device 1 according to the first embodiment, the water pipe 6, the hot water supply water pump 4, the water pipe 5, and the pipe connection joint 10 are arranged in a straight line, and the second insertion portion 10c of the pipe connection joint 10 and the tank connection are connected. The connection with the protrusion 9 is in the horizontal direction. Further, in the hot water supply device 1, the connection between the first insertion portion 10b of the pipe connection joint 10 and the water pipe 5 is downward in the vertical direction. As a result, in the hot water supply device 1, in the path connecting the hot water supply water pump 4 and the hot water storage tank 2, air escapes upward from the hot water supply water pump 4 side to the hot water storage tank 2 side. There is no need to provide a shaped pipe.

<Effect of Embodiment 1>
As described above, in the hot water supply device 1 according to the first embodiment, the pipe connection joint 10 bent in the right angle direction is used in the connection between the tank connection protrusion 9 of the hot water storage tank 2 and the water pipe 5. Therefore, the water pipe 5 can be directly connected to the tank connecting protrusion 9 of the hot water storage tank 2.

At this time, the connection between the pipe connection joint 10 and the tank connection protrusion 9 of the hot water storage tank 2 is in the horizontal direction, and the connection port between the pipe connection joint 10 and the water pipe 5 is downward from the horizontal direction. .. Therefore, in the hot water supply device 1, it is possible to eliminate the need to provide the torii-shaped pipe as in the conventional case, and the space can be saved by that amount, and the hot water supply device 1 can be easily installed.

Moreover, in the hot water supply device 1, since the water pipe 5 can be directly connected to the tank connection protrusion 9 of the hot water storage tank 2, the air in the path connecting the hot water supply water pump 4 and the hot water storage tank 2 escapes upward. go. Therefore, in the hot water supply device 1, an air pool as in the conventional case is formed, and the accumulated air flows to the hot water supply water pump 4 to prevent problems such as idling due to the occurrence of air biting, deterioration of capacity, or generation of abnormal noise. can. Further, in the hot water supply device 1, since air cannot be accumulated, an air vent valve becomes unnecessary.

Further, in the hot water supply device 1, the shapes of the water pipes 5 and 6 can be simplified by arranging the water pipe 6, the hot water supply water pump 4, the water pipe 5, and the pipe connection joint 10 in a straight line.

Further, in the hot water supply device 1, since the shape of the path connecting the hot water supply water pump 4 and the hot water storage tank 2 is simplified, the hot water supply water pump 4, the water pipe 5, and the pipe connection joint 10 can be integrated and individually. There is no need to assemble to.

In addition, in the hot water supply device 1, the pipe connection joint 10 is formed with a first insertion portion 10b into which the water pipe 5 is inserted on one end side, and a tank connection protrusion 9 is inserted on the other end side. The second insertion portion 10c is formed. Then, in the hot water supply device 1, since the water pipe 5 and the tank connection protrusion 9 to be connected are connected to the pipe connection joint 10 in a state of being inserted, they can be connected so as to cover these connection targets. It is possible to prevent leakage of hot water flowing through the water pipe 5 and the tank connecting protrusion 9.

Further, in the hot water supply device 1, these connections can be easily removed in the connection between the pipe connection joint 10 and the tank connection protrusion 9 of the hot water storage tank 2 and the connection between the pipe connection joint 10 and the water pipe 5. A possible fixture 14 is used. That is, the fixture 14 has a first annular portion 14a and a second annular portion 14b that form an annular shape corresponding to the connection portion between the pipe connecting joint 10 and the water pipe 5 or the tank connecting protrusion 9. It consists of an elastic member. Then, the fixture 14 is connected between the first ring portion 14a and the second ring portion 14b by the elastic force due to the elastic deformation of the first ring portion 14a and the second ring portion 14b. The part is sandwiched and fixed. Therefore, the pipe connection joint 10 and the tank connection protrusion 9 and the pipe connection joint 10 and the water pipe 5 can be held in a connected state with one touch, so that the installation work can be facilitated.

1 Hot water supply device, 2 Hot water storage tank, 3 Hot water supply heat exchanger, 4 Hot water supply water pump, 5 Water pipe, 5a end, 6 Water pipe, 7 Hot water supply pipe, 7a Hot water tap, 8 Makeup water pipe, 8a Water tap, 9 Tank connection protrusion, 9a end, 10 pipe connection joint, 10a cylindrical pipe, 10b first insertion part, 10c second insertion part, 11 water pipe, 13 outdoor unit, 14 fixture, 14a first ring part , 14b 2nd ring, 14c end, 14d end, 14e groove hole, 15 O ring.

In the hot water supply device according to the present invention, a hot water storage tank, a hot water supply heat exchanger, and a hot water supply water pump are connected via a water pipe, and water is heated by the hot water supply heat exchanger to obtain high-temperature hot water. Is a hot water supply device that is circulated and stored in the hot water storage tank by the hot water supply water pump, and hot water is taken out from the hot water storage tank and supplied as needed. A tank connecting protrusion communicating with the inside of the hot water storage tank and a connecting member arranged between the water pipe connected to the hot water supply water pump and the hot water storage tank are provided, and the connecting member comprises the hot water storage tank. The connection state of the pipe connection joint for directly connecting the water pipe to the tank connection protrusion of the tank, the pipe connection joint, the tank connection protrusion, and the water pipe is maintained. In the pipe connection joint, the water pipe is connected to one end side and the tank connection protrusion is connected to the other end side, so that the one end side and the other end are connected. Ri Na is bent so that the side is positioned at a right angle, the water pipe, the water for hot water supply pump and the pipe connecting joint, that are located on a straight line.

Claims (3)

The hot water storage tank, the hot water supply heat exchanger, and the hot water supply water pump are connected via a water pipe, the water is heated by the hot water supply heat exchanger, and the obtained high-temperature hot water is stored by the hot water supply water pump. A hot water supply device that circulates and stores water in a tank, and takes out hot water from the hot water storage tank and supplies it as needed.
A tank connection protrusion that is attached to the hot water storage tank so as to project outward and communicates with the inside of the hot water storage tank.
A connecting member arranged between the water pipe connected to the hot water supply water pump and the hot water storage tank is provided.
The connecting member
A pipe connection joint for directly connecting the water pipe to the tank connection protrusion of the hot water storage tank, and
It has a pipe connection joint, a tank connection protrusion, and a fixture for holding a connection state between the water pipe and the water pipe.
The pipe connection joint is
A hot water supply device in which the water pipe is connected to one end side, the tank connection protrusion is connected to the other end side, and the one end side and the other end side are bent so as to be located at right angles. .. The pipe connection joint is
A first insertion portion into which the water pipe is inserted is formed on one end side.
The hot water supply device according to claim 1, wherein a second insertion portion into which the tank connection protrusion is inserted is formed on the other end side. The fixture is
It is composed of an elastic member having a first annular portion and a second annular portion forming an annular shape corresponding to a connection portion between the pipe connecting joint and the water pipe or the tank connecting protrusion.
The claim that the connection portion is sandwiched and fixed between the first annular portion and the second annular portion by the elastic force due to the elastic deformation of the first annular portion and the second annular portion. The hot water supply device according to 1 or 2.

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