JP2013245919A5

JP2013245919A5 -

Info

Publication number: JP2013245919A5
Application number: JP2012122127A
Authority: JP
Filing date: 2012-05-29
Publication date: 2014-10-09
Anticipated expiration: 2032-05-29

Claims

A hot water storage tank for storing hot water,
A boiling heat exchanger that heats the water in the hot water storage tank using predetermined heating means to form high-temperature water;
A use side heat exchanger for exchanging heat between hot water in the hot water storage tank and bathtub water in the bathtub;
One end is connected to the lower part of the hot water storage tank, the boiling heat exchanger is installed in the middle, and the other end is connected to the upper part of the hot water storage tank,
One end is connected to the upper part of the hot water storage tank, the use side heat exchanger is installed on the way, and the other end is connected between the lower part of the hot water storage tank and the heating heat exchanger in the boiling water circulation circuit Heat source side piping,
First flow path switching means installed at a connection portion between the boiling water circulation circuit and the other end of the heat source side pipe;
It is a circuit configured in an annular shape from the bathtub, and the bathtub water circulation circuit in which the use side heat exchanger and the bath circulation pump are installed in the middle,
A circulation pump installed between the first flow path switching means and the boiling heat exchanger in the boiling water circulation circuit;
A bypass pipe having one end connected to a discharge side of the circulation pump in the boiling circulation circuit and the other end connected between the boiling heat exchanger and an upper part of the hot water storage tank in the boiling water circulation circuit; ,
Second flow path switching means installed at a connection portion between the boiling water circulation circuit and the other end of the bypass pipe;
One end is connected to the lower part of the hot water storage tank, and the other end is connected to the heat source side pipe between the use side heat exchanger and the upper part of the hot water storage tank,
A third flow path switching means installed at a connection portion between the other end of the low temperature water pipe and the heat source side pipe;
One end is connected between the upper part of the hot water storage tank and the second flow path switching means in the boiling circulation circuit, and the other end is connected to a hot water supply terminal,
Low temperature water detection means for detecting the temperature of the low temperature water flowing out from the hot water storage tank to the low temperature water pipe;
Bathtub water temperature detecting means for detecting the temperature of the bathtub water flowing out from the bathtub to the bathtub water circulation circuit;
A flow rate detecting means provided in the middle of the hot water supply pipe,
When the flow rate detection means detects a flow rate that is equal to or higher than a predetermined flow rate, and the temperature detected by the low-temperature water detection means is lower than the temperature detected by the bath water temperature detection means, the first, second, second By operating the three flow path switching means, the third flow path switching means, the use side heat exchanger, the first flow path switching means, the circulation pump, and the second flow path switching means from the lower part of the hot water storage tank. And a control means for driving the circulation pump and the bath circulation pump, forming a flow path communicating with the hot water supply pipe through
A hot water storage type water heater characterized by comprising:

A hot water supply temperature detecting means for detecting the temperature of the hot water flowing through the hot water supply pipe;
The hot water storage type hot water heater according to claim 1, wherein the control means includes means for controlling the number of revolutions of the circulation pump so that the temperature detected by the hot water supply temperature detection means becomes a predetermined temperature.

The time zone which has set the automatic heat retention function which adjusts the bathtub water in the said bathtub to preset temperature is further equipped with the restriction | limiting means which restrict | limits execution of the operation | movement by the said control means. The hot water storage water heater described.

Bath detection means for detecting the user's bathing into the bathtub is further provided, and when the user's bathing is detected by the bath detection means, second restriction means for restricting execution of the operation by the control means. The hot water storage type water heater according to any one of claims 1 to 3, further comprising:

A return pipe having one end connected to a position vertically above the lower part of the hot water storage tank and the other end connected to the second flow path switching means;
When the flow rate detected by the flow rate detection unit becomes less than a predetermined small flow rate during the operation of the control unit, the second flow path switching unit is operated to start the third flow from the lower part of the hot water storage tank. Forming a flow path communicating with the return pipe through the path switching means, the use side heat exchanger, the first flow path switching means, the circulation pump and the second flow path switching means in order, and the circulation The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, further comprising standby means for stopping the bath circulation pump and waiting for a predetermined time while driving the pump.

A second bypass pipe having one end connected between the second flow path switching means and the upper part of the hot water storage tank in the boiling circulation circuit, and the other end connected to the third flow path switching means;
An outside air temperature detecting means for detecting the outside air temperature;
When the temperature detected by the outside air temperature detecting means is lower than a predetermined outside air temperature, and when the temperature detected by the bath water temperature detecting means is higher than the predetermined bath water temperature, the first, second and second By operating three flow path means, the utilization side heat exchanger, the first flow path switching means, the circulation pump, the boiling heat exchanger, the second flow path switching means, and the third flow path switching means And a second control means for driving the circulation pump and the bath circulation pump,
The hot water storage type hot water heater according to any one of claims 1 to 5, further comprising:

Any of claims 1 to 6, further comprising a reverse flow preventing means for preventing the hot water flows toward the lower portion of the hot water storage tank from the third flow path switching unit in said cold water pipe The hot water storage type water heater according to item 1.