JP2009019802A - Storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage type water heater enabling to provide priming water from the upper part of a hot water storage tank into a reheating heat source side circuit. <P>SOLUTION: The storage type water heater comprises the hot water storage tank 1 for storing hot water obtained by heating internal water with a heating means, the reheating heat source side circuit 6 for taking the hot water stored in the hot water storage tank 1 out of a tank hot water take-out port 18 provided in the upper part of a cylindrical portion of the hot water storage tank 1 and returning it between the middle part and the lower part of the hot water storage tank 1, a reheating circulating pump 8 for circulating the hot water in the reheating heat source side circuit 6, a check valve 9 to be opened in the direction of circulating the hot water in the reheating heat source side circuit 6, and a heat exchanger 7 provided on the way of the reheating heat source side circuit 6 for using the circulated hot water for heat exchange on the hot temperature side. The reheating heat source side circuit 6 takes water horizontally or downside obliquely out of the tank hot water take-out port 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a hot water storage type hot water heater provided with a supplementary cooking heat source side circulation line connected to a heat exchanger.

  The hot water storage type hot water heater described in Patent Document 1 includes a heating circuit, a primary side circulation pump, and a circulation direction of the primary side circulation circuit in a primary side circulation circuit having a tank hot water outlet provided in an upper part of a hot water storage tank. And a check valve that opens at a distance.

JP 2005-345041 A

  However, in Patent Document 1, the tank hot water outlet of the primary side circulation circuit is provided upward at the upper portion of the hot water storage tank, so that when the hot water storage tank is filled with hot water, air enters the primary side circulation circuit. Easy to stay. Since the air staying in the primary side circulation circuit is blocked from escape by the hot water filled in the hot water storage tank, it is difficult to discharge the air staying in the primary side circulation circuit from the tank hot water outlet. Even if the primary circulation pump is activated, priming water cannot be introduced from the tank hot water outlet due to the air accumulated in the primary circulation circuit and the piping resistance of the primary circulation circuit. There was a problem that.

  The present invention has been made in view of the above, and provides a hot water storage type water heater that enables priming water from the upper part of a hot water storage tank to the additional heat source side circulation pipe without the additional cooking circulation pump being idly operated. The purpose is to obtain.

  In order to solve the above-described problems and achieve the object, the present invention provides a hot water storage tank for storing hot water obtained by heating internal water by a heating means, and hot water stored in the hot water storage tank. A hot water supply side circulation line that takes water from a tank hot water outlet provided at the upper part of the hot water storage tank cylindrical part and returns between the middle part and the lower part of the hot water storage tank, and hot water is supplied to the additional heat source side circulation line. A recirculating hot water circulating pump, a check valve that opens in the hot water circulation direction of the additional heat source heat source side circulation line, and a heat exchanger that is provided in the middle of the additional heat source heat source side circulation line for heat exchange. In the hot water storage type water heater provided with a heat exchanger used on the high temperature side, the additional cooking heat source side circulation conduit is taken out horizontally or obliquely downward from the tank hot water outlet.

  According to the present invention, since the additional cooking heat source side circulation pipe is taken out from the tank hot water outlet provided at the upper part of the tubular portion of the hot water storage tank horizontally or obliquely downward, the water level of the hot water in the hot water storage tank is When the water reaches the tank hot water outlet, the hot water in the hot water storage tank is re-prepared and flows into the circulation line on the heat source side. Since the water is discharged from the outlet into the hot water storage tank, when the hot water level in the hot water storage tank rises above the tank hot water outlet, there is no stagnant air in the additional cooking heat source side circulation line, and additional water is thereby added. There is an effect that the cooking circulation pump can be priming from the upper part of the hot water storage tank to the heat source side circulation pipeline without idling.

  DESCRIPTION OF EMBODIMENTS Embodiments of a hot water storage type water heater according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a device configuration of a hot water storage type hot water supply apparatus according to the present invention, FIG. 2 is a schematic diagram when water is supplied to a hot water storage tank, and FIG. 3 is a priming water to a recirculation heat source side circulation pipeline. FIG.

  As shown in FIG. 1, a hot water storage water heater 100 includes a hot water storage tank 1 for storing hot water, a heat pump unit 2 for heating water in the hot water storage tank 1, and low-temperature water at the lower part of the hot water storage tank 1 to the heat pump unit 2. The heat pump delivery pipe 3 to be supplied, the heating circulation pump 4 provided in the heat pump delivery pipe 3 to circulate the low temperature water below the hot water storage tank 1 to the heat pump unit 2, and the water heated by the heat pump unit 2 in the hot water storage tank 1 A heat pump return pipe 5 that is supplied to the upper part is provided, and the heat pump forward pipe 3 and the heat pump return pipe 5 are circulation pipes that circulate hot water into the hot water storage tank 1 and the heat pump unit 2.

  The hot water storage type hot water heater 100 includes a water supply pipe 10 that supplies water to the hot water storage tank 1 from a water source, a pressure reducing valve 11 that is provided in the water supply pipe 10 to reduce the original supply pressure from the water source, and the hot water storage tank 1. The hot water supplied to the mixing valve 13 and the hot water supplied via the hot water piping 12 and the hot water supplied via the hot water piping 12 at a predetermined mixing ratio, A mixing valve 13 that adjusts the temperature to a predetermined temperature, a hot water supply pipe 14 that supplies hot water adjusted to a predetermined temperature by the mixing valve 13, and a water supply pipe 20 that guides the water decompressed by the pressure reducing valve 11 to the lower part of the hot water storage tank 1. With.

  Furthermore, the hot water storage type water heater 100 includes a reheating heat source side circulation pipe 6 that enables reheating of bathtub water. The reheating heat source side circulation pipeline 6 is taken out horizontally from a tank hot water outlet 18 provided at the upper part of the tubular portion of the hot water storage tank 1. In the additional heat source side circulation line 6, a heat exchanger 7, an additional circulation pump 8 that circulates the hot water in the hot water storage tank 1 to the heat exchanger 7, and a check valve 9 that opens in the additional heat source side circulation direction, The recirculation heat source side circulation line 6 is connected to the tank hot water provided between the middle portion and the lower portion of the hot water storage tank 1 via the heat exchanger 7, recirculation circulation pump 8, and check valve 9. Connected to the return port 19. Here, the heat exchanger 7 is a heat exchanger that heats the hot water in the bathtub 17 by exchanging heat between the low-temperature water in the bathtub 17 and the high-temperature water in the reheating heat source side circulation pipeline 6. A bathtub water circulation pipe 15 is connected to the heat exchanger 7 from a bathtub 17, and the bathtub water circulation pipe 15 is provided with a bathtub water circulation pump 16 that circulates hot water in the bathtub 17 to the heat exchanger 7. .

  Next, the operation of the hot water storage type water heater 100 of the embodiment will be described. First, water supplied from the water supply pipe 10 is reduced to a constant pressure by the pressure reducing valve 11 and supplied to the hot water storage tank 1 through the water supply pipe 20. The water supplied into the hot water storage tank 1 is supplied to the heat pump unit 2 from the lower part of the hot water storage tank 1 via the heat pump outgoing pipe 3 and heated by the operation of the heating circulation pump 4. Hot water heated to a high temperature is returned from the heat pump unit 2 to the upper portion of the hot water storage tank 1 via the heat pump return pipe 5 and stored in the hot water storage tank 1.

  Further, by opening a hot-water tap (not shown), water supplied via the water supply pipe 10 and high-temperature water supplied via the hot water supply pipe 12 are mixed at a predetermined mixing ratio by the mixing valve 13. The hot water adjusted to a predetermined temperature is supplied from the hot water supply pipe 14.

  Next, the bath water pursuit operation will be described. In order to heat the bathtub water, the bathtub water circulation pump 16 is operated, the low-temperature water in the bathtub 17 is guided to the bathtub water circulation pipe 15, and returned to the bathtub 17 through the heat exchanger 7. At the same time, the recirculation circulation pump 8 is operated, and the high-temperature water in the hot water storage tank 1 is taken out from the tank hot water outlet 18 of the recirculation heat source side circulation pipe 6 at the upper part of the tubular portion of the hot water storage tank 1, and heat exchanger 7 is returned to the hot water storage tank 1 through the tank hot water return port 19 of the recirculation heat source side circulation pipe 6 between the middle part and the lower part of the hot water storage tank 1. At this time, in the heat exchanger 7, heat exchange is performed by the temperature difference between the hot water from the hot water storage tank 1 and the low-temperature water from the bathtub 17, and the low-temperature water from the bathtub 17 receives heat and rises in temperature. The hot water from the upper part of the hot water storage tank 1 is returned to the bathtub 17 and returned between the middle part and the lower part of the hot water storage tank 1 in a state where the heat is removed and the temperature is lowered.

  Next, priming water to the reheating heat source side circulation pipe 6 will be described. First, as shown in FIG. 2, when the water level reaches the tank hot water return port 19 of the heat source side circulation pipe 6 by water supply from the water supply pipe 10 into the hot water storage tank 1, The inflow of water from the lower part of the tank 1 to the additional heat source side circulation pipe 6 is prevented. After that, as shown in FIG. 3, when the water level in the hot water storage tank 1 reaches the tank hot water outlet 18, the water in the hot water tank 1 flows from the tank hot water outlet 18 into the additional heat source side circulation pipe 6. Start. Here, since the reheating heat source side circulation pipe 6 is taken out horizontally from the tank hot water outlet 18, the air in the reheating heat source side circulation pipe 6 is stored in hot water flowing in from the tank hot water outlet 18. The water is discharged from the tank hot water outlet 18 into the hot water storage tank so that the water in the tank 1 is replaced. Therefore, when the hot water level in the hot water storage tank 1 rises to above the tank hot water outlet 18, there is no stagnant air in the reheating heat source side circulation pipe 6, and thereby the renewed cooking circulation pump 8 is empty. The priming water from the upper part of the hot water storage tank 1 to the reheating heat source side circulation pipe 6 can be performed without operation.

  In this way, in the present embodiment, the reheating heat source side circulation pipe 6 is taken out horizontally from the tank hot water outlet 18, so that the reheating heat pump side circulation pipe 8 does not run idle. A hot water storage type water heater capable of priming water to the road 6 can be provided.

  In this embodiment, the reheating heat source side circulation conduit 6 is attached horizontally from the tank hot water outlet 18 but may be attached obliquely downward from the tank hot water outlet 18 at a desired angle. Alternatively, it may be attached so as to draw a downward curve from the tank hot water outlet 18. Further, the heat exchanger 7 may be used for heat exchange in other systems such as indoor heating other than reheating.

  The hot water storage type water heater according to the present invention is useful for a hot water storage type water heater provided with a heat exchanger.

It is a figure which shows the apparatus structure of the hot water storage type water heater concerning embodiment of this invention. It is the schematic at the time of water supply to a hot water storage tank. It is the schematic of the priming water to the reheating heat source side circulation conduit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heat pump unit 3 Heat pump outgoing piping 4 Heating circulation pump 5 Heat pump return piping 6 Reheating heat source side circulation piping 7 Heat exchanger 8 Reheating circulation pump 9 Check valve 10 Water supply piping 11 Pressure reducing valve 12 Hot water piping 13 Mixing Valve 14 Hot water supply pipe 15 Bathtub water circulation line 16 Bathtub water circulation pump 17 Bathtub 18 Tank hot water outlet 19 Tank hot water return port 20 Water supply pipe 100 Hot water storage type water heater

Claims (1)

A hot water storage tank for storing hot water obtained by heating the internal water by heating means,
The hot water stored in the hot water storage tank is taken from a tank hot water outlet provided at the upper part of the hot water storage tank cylindrical part and returned between the middle part and the lower part of the hot water storage tank,
Additional cooking circulation pump that circulates hot water in this additional cooking heat source side circulation pipeline,
A check valve that opens in the hot water circulation direction of the additional cooking heat source side circulation line;
A heat exchanger that is provided in the middle of the additional cooking heat source side circulation pipeline and uses the circulated hot water on the high temperature side of the heat exchange;
In a hot water storage water heater equipped with
The hot water storage type hot water heater is characterized in that the additional cooking heat source side circulation pipeline is taken out horizontally or obliquely downward from the tank hot water outlet.

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