JP6483603B2 - Water heater - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a hot water storage type hot water heater provided with an on-off valve in a hot water discharge pipe.

  Conventionally, a pressure relief valve for discharging air accumulated in the hot water storage tank to the outside and a hot water outlet pipe for flowing hot water have been provided at the top of the hot water storage tank (for example, Patent Document 1).

  For example, as shown in FIG. 5, in this type of hot water storage type water heater, a hot water discharge pipe 102 for discharging hot water in the hot water storage tank 101 is connected to the upper part of the hot water storage tank 101, and in the middle of the hot water supply pipe 102, An on-off valve 103 that also serves as a pressure relief valve that releases air accumulated in the upper part of the hot water storage tank 101 or a pressure higher than a predetermined value of the hot water storage tank 101 is provided orthogonal to the horizontal direction of the hot water discharge pipe 102.

JP 2006-250507 A

  However, as shown in Patent Document 1 and FIG. 5, the pressure relief valve 103 is provided in the middle of the outlet pipe 102 so as to be orthogonal to the outlet pipe 102 in the horizontal direction, so that sufficient air is supplied to the pressure relief valve 103. As a result, there was a problem that the air venting efficiency deteriorated.

  Moreover, since the pressure relief valve is provided in the hot water storage tank top part in patent document 1, only air can be discharged | emitted and waste_water | drain is performed in another part of the hot water storage tank lower part, a structure becomes complicated, and a hot water storage tank Since it is at the top, it is difficult for the user to operate, and the hot water storage unit including the hot water storage tank becomes vertically large, and there is a problem that the installation space is limited.

  In order to solve the above problems, the present invention provides a hot water storage tank for storing hot water, a water supply pipe for supplying water to the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, and a water supply branched from the water supply pipe A bypass pipe, a hot water mixing valve that mixes hot water from the hot water outlet pipe and water from the feed water bypass pipe, and an open / close that can be opened and closed manually or automatically in the middle of the hot water pipe and that expels air in the hot water heater In the hot water supply apparatus comprising: a valve; a discharge port that discharges air and water by opening the on-off valve; and an air vent configured by the on-off valve and the discharge port. An upstream hot water discharge pipe for discharging hot water in the upper part of the hot water storage tank having a horizontal flow path, and a downstream hot water discharge pipe for discharging hot water from the upstream hot water discharge pipe having a substantially vertical vertical flow path, Connected to one end The downstream side hot water pipe is connected to the other end, and has a branch part for branching the flow path to the air venting means, and the horizontal flow path of the upper outlet hot water pipe and the lower part via the branch part The vertical flow path of the outflow hot water pipe was communicated, and the air venting means was provided at a position on a straight line of the horizontal flow path.

  Further, the air vent means is provided at a position above the inlet of the vertical flow path.

  Thus, according to the invention of claim 1, by providing the air venting means on the straight line of the horizontal flow path, when air is vented, water pressure is applied to the air venting means on the straight line of the horizontal flow path as it is. Therefore, the air venting performance can be improved.

  According to the invention of claim 2, the air accumulated in the hot water storage tank is sent to the hot water discharge pipe above the hot water storage tank, and the air venting means is provided above the direction of the vertical flow path in which the hot water flows. The air can be discharged more efficiently at the discharge port, and the air venting performance can be improved.

Schematic explanatory diagram of the first embodiment of the present invention 1 is a perspective view of a first embodiment of the present invention. Longitudinal sectional view of the first embodiment of the present invention Longitudinal sectional view of the second embodiment of the present invention Conventional pressure relief valve layout

An embodiment of a hot water supply apparatus of the present invention will be described with reference to FIG.
1 is a hot water storage tank for storing hot water, 2 is a water supply pipe connected to the lower part of the hot water storage tank 1, 3 is a hot water supply pipe connected to the upper part of the hot water storage tank 1, and 4 is a heat pump type for heating the hot water in the hot water storage tank 1. The heating means 5 is a heat pump circulation circuit that connects the lower part of the hot water storage tank 1, the heat pump type heating means 4, and the upper part of the hot water storage tank 1 so that hot water in the hot water storage tank 1 can circulate. Although not shown, hot water in the hot water storage tank 1 and the heat pump heating means 4 is circulated by a heat pump circulation pump provided in the middle of the heat pump circulation circuit 5.

  6 is a water supply bypass pipe that branches in the middle of the water supply pipe 2, and 7 is a hot water supply that mixes hot water flowing through the tap water pipe 3 with city water flowing through the water supply bypass pipe 6 at an appropriate ratio to adjust the hot water supply set temperature or bath set temperature. A mixing valve, 8 is a hot water supply pipe through which the mixed water mixed in the hot water supply mixing valve 7 flows, 9 is a hot water tap for supplying mixed water from the hot water supply pipe 8, and 10 is a flow rate of hot water provided in the middle of the hot water supply pipe 8 A flow sensor 11 for detecting the temperature of the mixed water mixed by the hot water mixing valve 7 and a flow rate adjusting valve 12 for adjusting the flow rate of the hot water mixed by the hot water mixing valve 7.

  13 is an on-off valve that can be opened and closed manually or automatically in the middle of the hot water discharge pipe, and can prompt the discharge of air in the hot water supply device, and 14 is an open / close valve 13 that opens to release air and water. An exhaust port 15 is an air vent unit configured by the on-off valve 13 and the exhaust port 14 for performing an air vent operation. The on-off valve 13 serves as an on-off valve that opens to release the pressure when the pressure in the hot water tank 1 exceeds a predetermined value in order to prevent the pressure in the hot water tank 1 from rising excessively. A spring-type pressure relief valve may be used.

  16 is a bath heat exchanger for exchanging heat with high-temperature water in the upper part of the hot water storage tank 1, 17 is a bathtub, 18 is a bath circulation circuit for connecting the bath heat exchanger 16 and the bathtub 17 so that hot water can circulate, and 19 is a bath circulation circuit. 15 is a bath circulation pump provided in the middle of 15.

  Reference numeral 20 denotes a control device that controls operation of hot water supply operation and bath operation, and controls the opening degree of each valve based on the detection result detected by each sensor.

Next, the water supply operation of the hot water storage tank 1 and the air venting operation of the hot water storage tank 1 which are test operation operations after the installation of the hot water storage type hot water heater will be described.
In order to fill the hot water storage tank 1 with water, the installer opens the on-off valve 13 and opens the discharge port 14 to supply water from the water supply pipe 2 to the hot water storage tank 1. At this time, the air remaining in the hot water storage tank 1 is pushed out to the water, passes through the hot water discharge pipe 3 at the upper part of the hot water storage tank 1, and is discharged out of the appliance from the discharge port 14. After a predetermined time (in this case, 20 minutes), it is confirmed that water has been drained vigorously from the drain port 14, and after confirming that no air is discharged from the drain port 14, the installer closes the on-off valve 13. Complete water supply and venting.

Next, the detailed configuration of the embodiment of the present invention will be described in detail with reference to FIGS.
The hot water discharge pipe 3 is connected to an upstream hot water discharge pipe 3A for discharging hot water in the upper part of the hot water storage tank 1, a downstream hot water discharge pipe 3B for discharging hot water from the upstream hot water discharge pipe 3A, and an upstream hot water discharge pipe 3A at one end. A downstream side hot water discharge pipe 3 </ b> B is connected to the other end, and a branch portion 21 that branches the flow path to the air vent means 15 is provided.

  In addition, since the linear flow path in the substantially horizontal direction from the one end of the branch portion 21 to the air vent means 15 needs an appropriate length, it is substantially horizontal in the vicinity of the one end of the branch portion 21 of the upstream tap pipe 3A. A straight shape is preferable in the direction, and here, the length of the straight flow path in the substantially horizontal direction is secured by the elbow 22.

  Here, the linear flow path in the branch portion 21 and the elbow 22 or the upstream side hot water discharge pipe 3A in the substantially horizontal direction is referred to as a horizontal flow path 23, and the flow in the branch portion 21 and the downstream side hot water discharge pipe 3B in the substantially vertical direction. The path is referred to as a vertical flow path 24.

  The air vent means 15 is provided at a position on a straight line of the horizontal flow path 23 extending substantially horizontally, and the air vent means 15 is provided at a position above the vertical flow path inlet 25.

  Thus, by providing the air venting means 15 on the straight line of the horizontal flow path 23, the water pressure of the flowing water is directly applied to the air venting means 15 on the straight line of the horizontal flow path 23 when air is vented. It becomes easy to push out the air accumulated in the hot water storage tank 1 from the outlet 14 to the outside of the appliance, and the air venting performance can be improved.

  Further, since the air venting means 15 is above the vertical flow path inlet 25, the air is lighter than water, so the air rises upward and is vented from the air vent means 15 at the discharge port 14, and hot water is fed from the vertical flow path 24 to the hot water supply mixing valve. 7, the air venting operation can be performed efficiently.

  In addition, this invention is not limited to embodiment, It does not prevent changing in the range which does not change a summary, For example, in the Example of this invention, it is a linear flow path in the substantially horizontal direction with the elbow 22. Although the elbow 22 is not used, the straight connection pipe 26 is connected, or the length of the substantially horizontal straight flow path can be secured only by the upper effluent pipe 3A. Good.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 3 Outlet pipe 3A Upper outflow hot water pipe 3B Lower outflow hot water pipe 7 Hot water mixing valve 8 Hot water supply pipe 13 On-off valve 14 Outlet 15 Air venting means 21 Branch part 22 Elbow 23 Horizontal flow path 24 Vertical flow path 25 Vertical flow path inlet

Claims (2)

A hot water storage tank for storing hot water, a water supply pipe for supplying water to the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, a water supply bypass pipe branched from the water supply pipe, and hot water from the hot water supply pipe And a hot water mixing valve that mixes water from the water supply bypass pipe, an open / close valve that can be opened or closed manually or automatically in the middle of the hot water discharge pipe, and expelling air in the hot water heater, and the open / close valve is opened. In the hot water supply apparatus having a discharge port for discharging air and water, and an air vent means constituted by the on-off valve and the discharge port, the hot water discharge pipe has a substantially horizontal horizontal flow path and the hot water storage device. An upstream hot water discharge pipe for discharging hot water in the upper part of the tank, a downstream hot water discharge pipe having a substantially vertical vertical flow path for discharging hot water from the upstream hot water discharge pipe, and the upstream hot water discharge pipe connected to one end. The downstream side hot water pipe is connected to the other end And having a branch part for branching the flow path to the air vent means, and through the branch part, the horizontal flow path of the upper effluent hot water pipe and the vertical flow path of the lower effluent hot water pipe are communicated, A hot water supply apparatus, wherein the air venting means is provided at a position on a straight line of the horizontal flow path. The hot water heater according to claim 1, wherein the air venting means is provided at a position above the inlet of the vertical flow path.

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