JP5968743B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply apparatus in which a plurality of drain hoses are integrated into one water collector so that only one drain pipe is exposed outside the appliance.

  Conventionally, in this type of hot water storage type hot water supply apparatus, a drain pan drain hose that receives water leakage and a drain pipe that penetrates the drain pan for draining water in the hot water storage tank are fixed with a hose fixture above the drain groove. The workability was improved by fixing adjacent to. (See Patent Document 1.)

JP 2010-249450 A

  By the way, in this conventional thing, as the drainage hose, two hoses are exposed outside the appliance, and the overpressure relief valve hose connected to the hot water storage tank is also separately provided, and there are many drainage hoses. The appearance of the drainage pipe is not good, and the location of the drainage pipe that drains hot water in the hot water storage tank and has a large drainage volume is not specified for the drainage ditch, so there is a risk that the drainage will overflow from the drainage ditch. there were.

This invention pays attention to this point and solves the above-mentioned problems. In particular, the construction is designed to relieve the hot water storage tank for storing hot water, the heating means for heating the hot water in the hot water storage tank, and the overpressure in the hot water storage tank. A relief valve with a negative pressure valve that breaks down the negative pressure, a drain plug that communicates with the bottom of the hot water storage tank and drains hot water in the hot water storage tank, branches from the hot water pipe, and connects to a bath circulation circuit to fill the hot water in the bath The relief valve with a negative pressure valve is provided with a hot water filling pipe and a hopper valve that is connected to the hot water filling pipe and prevents the bath water in the bath circulation circuit from flowing into the water supply side when water is cut off. A drainage hose connected, a drainage drain hose connected to the drain plug, and a hopper drain hose connected to the hopper valve are connected to each other, and the lid of the water collector includes Paired with the lower drainage port Position the connection port of the wastewater is large wastewater drain hose provided to the, the position deviated from the drain outlet provided connection port of the connection port and the hopper drain hose drain hose relief is small wastewater, connection port of the relief drain hose Is composed of an insertion portion and a collar portion standing on the lid, and an air intake hole is formed between the collar and the lid .

As described above, according to the present invention, three drain hoses are integrated into one water collector, and only one drain pipe is required from the drain port. Many drainage hose connection ports are located opposite the drainage port, and the drainage hose connection port and the hopper drain hose connection port are located at a position away from the drainage port. It is safe to use without worrying about overflowing.
Furthermore, since the intake hole of the relief valve with a negative pressure valve is reliably secured, even in the unlikely event that the inside of the hot water tank becomes negative pressure, it is possible to prevent damage by supplying air to the hot water tank. Furthermore, since the air intake hole is formed between the collar and the lid, it can be used safely for a long time without worrying about being blocked by the hose and without being clogged with dust.

The schematic block diagram of one Embodiment of this invention. Explanatory drawing of the principal part. The perspective view of the water collector. The perspective view of the cover body of the same water collector. Sectional drawing of the water collector.

Next, an embodiment of the present invention will be described based on a hot water storage type hot water supply apparatus shown in the drawings.
1 is a cylindrical hot water storage tank that uses heating means 2 composed of a heat-pump unit using carbon dioxide refrigerant to boil hot water in the midnight hours when the unit price of contract power by time is low and store hot water. The lower part is connected to a water supply pipe 3 for supplying water, and the upper part is connected to a hot water discharge pipe 4 for discharging hot water stored in a hot water tap (not shown).

  5 is a hot water mixing valve comprising an electric three-way valve connected to a hot water supply pipe 4 on one side, a first water supply bypass pipe 6 branched from the water supply pipe 3 on the other side, and a hot water supply pipe 7 connected to the center. Hot water and hot water supplied from the first hot water supply bypass pipe 6 are mixed and supplied at a hot water supply set temperature set by the kitchen remote controller 8, and hot water is supplied by a hot water supply thermistor 9 provided in the hot water supply pipe 7. The hot water side opening of the hot water discharge pipe 4 and the water side opening of the first water supply bypass pipe 6 are adjusted by feedforward control from the temperature, the supply water temperature, and the hot water supply set temperature.

  10 is connected to a hot water discharge pipe 11 branched from the hot water discharge pipe 4 on one side, a second water supply bypass pipe 12 branched from the first water supply bypass pipe 6 on the other side, and a hot water filled pipe 13 connected to the center. A bath mixing valve composed of a three-way valve mixes high-temperature water from the bath outlet pipe 11 and water from the second water supply bypass pipe 12 so that the set temperature set by the bathroom remote controller 14 is reached. The hot water side opening of the bath hot water discharge pipe 11 and the water side opening of the second water supply bypass pipe 12 are adjusted by feedforward control from the hot water temperature, the hot water temperature, and the bath set temperature. Hot water at a bath setting temperature is supplied to the hot water filling tube 13, and a predetermined amount of hot water or additional hot water is applied to the bathtub 16 through the bath circulation circuit 15 connected to the hot water filling tube 13 at the set temperature.

  A hot water flow sensor 17 is provided in the hot water filling pipe 13 and counts the flow rate of hot water filling. The hot water filling solenoid valve 18 provided downstream is started to count. Further downstream, two check valves 19 and 20 that allow flow in the hot water filling direction but prevent reverse flow are provided, and between the two check valves 19 and 20 and the bath mixing valve 10. A rubber or resin hopper drain hose 22 having a hopper valve 21 communicating with the hot water flow sensor 17 is provided.

  The bath circulation circuit 15 that connects the bathtub 16 and the bath heat exchanger 23 provided in the upper part of the hot water storage tank 1 includes a bath thermistor 24 that detects the bath water temperature in the vicinity of the hot water pipe 13, and A bath flow sensor 25 that detects the presence or absence of residual water is provided. 26 is a self-priming bath circulation pump that circulates and heats bath water between the bathtub 16 and the bath heat exchanger 23, 27 is a water level sensor that detects the water level in the bathtub 16, and 28 bypasses the bath heat exchanger 23. The bath three-way valve provided in the bypass pipe 29 is configured to switch between passing the bath water through the bath heat exchanger 23 side or not passing through the bypass pipe 29 side. The bath water is sucked by the driving of the bath circulation pump 26 and flows into the bath heat exchanger 23 from the upper side of the bath heat exchanger 23, flows out from the lower side of the bath heat exchanger 23, and the bath three-way valve 28 and Circulation returning to the bathtub 16 through the bath circulation pump 26, especially by circulating from the top to the bottom in the bath heat exchanger 23, avoids contact with the hot water stored at a reduced temperature, so that the hot hot water is always hot. Heat exchange only with, very efficient Is shall.

  30 is a control means comprising a microcomputer connected to the kitchen remote control 8 and the bathroom remote control 14 for controlling hot water supply, hot water bathing, additional hot water, etc. Various sensors are connected to the input side and the outside temperature is detected. When the outside air temperature sensor 31 is connected and the outside air temperature falls below 0 ° C., the freeze prevention operation is started, the bath three-way valve 28 is opened on the bypass pipe 29 side, and the bath circulation pump 26 is driven at the minimum rotation speed for 10 minutes. Stop and check whether the bath flow sensor 25 has detected the remaining water. Without any remaining water, the bath three-way valve 28 is opened on the side of the bath heat exchanger 23 and left for 10 minutes. Residual water is drained to prevent freezing, and the bath flow sensor 25 performs control to open the bypass pipe 29 for another 10 minutes when there is residual water.

A water supply thermistor 32 is provided in the water supply pipe 3 to detect the water supply temperature, and 33 is a pressure reducing valve for reducing the water supply pressure.
Reference numeral 34 denotes a heating circulation circuit including an outward pipe 35, a return pipe 36, and a heating circulation pump 37 that connect the hot water storage tank 1 and the heating means 2 so that hot water can circulate.
38, 39, 40, 41 and 42 are hot water storage temperature sensors provided above and below the outer peripheral surface of the hot water storage tank 1, and 43 is provided in the hot water discharge pipe 4 to release the overpressure in the hot water storage tank 1 and destroy the negative pressure. It is a relief valve with a negative pressure valve.
A manual drain plug 44 communicates with the bottom of the hot water storage tank 1 and allows the hot water in the hot water tank 1 to be appropriately drained.

  Reference numeral 45 denotes a rubber or resin drain drain hose 46 connected to the relief valve 43 with the negative pressure valve, a rubber or resin drain drain hose 47 connected to the drain plug 44, and a hopper drain connected to the hopper valve 21. One water collector to which the hose 22 is connected, respectively, from a funnel-shaped receiving portion 48 and a lid 50 that covers the upper surface by locking the receiving portion 48 with elastic locking portions 49 on both sides. The connection port 52 of the drainage drain hose 47 with a large amount of drainage is formed at a position directly above the drainage port 51 below the receiving portion 48 of the lid 50, and the drainage port 51 on the inner surface of the receiving portion 48 is further formed. On the upper surface of the lid 50 facing the inclined surface 53 inclined downward toward the surface and removed from the drain port 51, the connection port 54 of the relief drain hose 46 and the connection port 5 of the hopper drain hose 22 having a small amount of drainage. Further, the connection port 54 of the escape drain hose 46 is larger than the outside diameter of the escape drain hose 46 and the insertion portion 56 which is erected on the lid 50 and inserted into the escape drain hose 46. A plurality of intake holes 58 are formed in the circumferential direction between the flange part 57 and the lid body 50, and one drain pipe 59 is communicated with the drain port 51. .

Next, the operation of this embodiment will be described.
In the midnight time zone of the contract power now, the low-temperature water in the lower part of the hot water tank 1 is boiled by the heating means 2 by the heating circuit 34, the hot water is returned to the upper part of the hot water tank 1, and this circulation is repeated sequentially from 23:00. The hot water is stored in the entire hot water storage tank 1 by 7 o'clock the next morning.

  And the hot water in this hot water storage tank 1 is mixed with the hot water from the hot water discharge pipe 4 and the hot water from the 1st hot water bypass pipe 6 with the hot water supply mixing valve 5, and is utilized for hot water supply as hot water of hot water supply preset temperature. Is.

  Next, when performing bath hot water supply such as hot water filling, the controller 30 opens the hot water solenoid valve 18 and drives the bath mixing valve 10 by instructing hot water filling with the kitchen remote control 8 or the bathroom remote control 14. By gradually opening the bath discharge pipe 11 in a closed state, hot water from the upper part of the hot water storage tank 1 is supplied through the bath discharge pipe 11, while water is supplied from the second water supply bypass pipe 12. The hot water and water supply are bath mixing valves 10, and the hot water side opening of the bath hot water discharge pipe 11 and the water side opening of the second water supply bypass pipe 12 are determined by the control means 30 from the hot water temperature, the water supply temperature, and the bath set temperature. Is adjusted by feedforward control, and hot water filling of a set amount is performed on the bathtub 16 through the hot water filling pipe 13 and the bath circulation circuit 15 at a sufficient flow rate for both high-temperature water and water supply.

  Next, when the hot water in the hot water storage tank 1 is drained, the manual drain plug 44 is opened so that the drain tap hose 47 is directed to the drain port 51 directly below the connection port 52 of the water collector 45 through the drain drain hose 47. It is drained smoothly, and even if a large amount of drainage is performed, it drains smoothly without leaking.

  When the pressure in the hot water storage tank 1 rises above a predetermined pressure, the relief valve 43 with a negative pressure valve is automatically opened to release the pressure above the predetermined pressure. Water is drained from the connection port 54 of the water collector 45 through the relief valve 43 with a negative pressure valve 43 and the drainage drain hose 46. The water is drained along the surface 53 toward the drain 51 and reliably drained without leaking.

  On the other hand, when the pressure in the hot water storage tank 1 becomes negative due to water breakage or the like, the relief valve 43 with a negative pressure valve is opened to suck in air, and the flange 57 and the lid 50 are connected to each other at the connection port 54 of the drain hose 46. Air is reliably sucked from the plurality of air intake holes 58 in between, and the negative pressure of the hot water storage tank 1 is destroyed. By providing the air intake holes 58 between the flange portion 57 and the lid body 50, the air is released. There is no worry of being blocked by the drain hose 46, and since there is no danger of drainage from the drainage water, the negative pressure can always be reliably destroyed.

  Further, when the water supply side becomes negative pressure due to water cut and the hopper valve 21 is opened, drain water is first drained from the connection port 55 through the hopper drain hose 22 and smoothly drained to the drain port 51 along the inclined surface 53. Then, the negative pressure on the water supply side causes the negative pressure on the water supply side to be destroyed by sucking air from the intake hole 58 between the flange portion 57 and the lid 50 by the negative pressure on the water supply side, so that the water supply side of the bathtub water Intrusion is prevented.

  By concentrating the three drain hoses 22, 46, and 47 in one water collector 45, the piping is neatly organized and only one drain pipe 59 comes out from the water collector 45. It can be used for a long time with a good appearance and a clean appearance.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heating means 4 Outlet pipe 13 Hot water filling pipe 15 Bath circulation circuit 21 Hopper valve 22 Hopper drain hose 43 Relief valve 44 with negative pressure valve Drain plug 45 Collector 46 Drain drain hose 47 Drain drain hose 50 Lid 51 drain Ports 52, 54, 55 Connection port 56 Insertion portion 57 Gutter portion 58 Air intake hole 59 Drain pipe

Claims (1)

A hot water storage tank for storing hot water, heating means for heating the hot water in the hot water storage tank, an escape valve with a negative pressure valve for releasing the overpressure in the hot water storage tank and destroying the negative pressure, and a bottom of the hot water storage tank A drain plug for draining hot water in the hot water storage tank, a hot water pipe that branches off from the hot water pipe and is connected to a bath circulation circuit to fill the bath, and is connected to the hot water pipe and connected to the hot water pipe in the bath circulation circuit when water is shut off. A hopper valve for preventing bath water from flowing into the water supply side, a drain drain hose connected to the relief valve with a negative pressure valve, a drain drain hose connected to the drain plug, and the hopper One drainage hose connected to the hopper drain hose connected to the valve is provided, and the drainage hose connection port with a large amount of drainage is provided on the lid of the catcher at a position facing the lower drainage port. Installation and drainage At a position deviated from the provided connection port and connection port of the hopper drain hose drain hose relief is small wastewater, connection port of the relief drain hose is composed of an insertion portion and a flange portion provided upright on the lid A hot water storage type hot water supply apparatus characterized in that an air intake hole is formed between the collar and the lid .

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