JPH0337109B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention includes a heat exchange coil exclusively used for baths that exchanges heat with hot water in the can inside a can exclusively used for hot water supply, which has a combustion chamber inside. This invention relates to a hot water heater with reheating system that circulates and heats water in a bathtub through this heat exchange coil.

(b) Conventional technology This type of water heater with reheating is, for example,
As disclosed in Publication No. 153947, the hot water in the can can be used to supply hot water to bathtubs, etc., and for heating.
It is a two-circuit system in one can that indirectly heats the water flowing through the heat exchange coil with the hot water in the can to refill the bath.
It has been attracting attention in recent years because of its advantages in terms of manufacturing cost, size, installation space, etc. In addition, the pump that circulates the water in the bathtub to the heat exchange coil has come to be housed in an outer box together with the can.

(c) Problems to be Solved by the Invention Incidentally, in the above-mentioned water heater with reheating, a self-priming pump is used as the circulation pump. Since self-priming pumps require priming, the pump itself is provided with a priming water inlet. For this reason, in a case where the circulation pump is housed in an outer box, the front panel of the outer box, etc. must be removed every time water is to be primed, which has the drawback of making the water injection process cumbersome.

This invention was made in view of the above-mentioned facts, and it is possible to
The purpose is to make it easier to pour water into the circulation pump.

(d) Means for Solving the Problems This invention includes a heat exchange coil exclusively used for baths that exchanges heat with hot water in the can inside a can exclusively used for hot water supply, which has a combustion chamber inside. This is an improved water heater with a reheating system, which is equipped with a circulation pump connected to the reheating piping, and the can body and the circulation pump are housed in an outer box.

In this invention, a branch port is provided in the priming piping inside the outer box, a priming water injection device having a priming water injection port is connected to this branch port, and this priming water injection device is made to protrude outside the outer box, and the priming water injection device is connected to the priming water injection port. It is equipped with a removable priming faucet.

(e) Action When the priming faucet is removed and water is injected from the priming water inlet, the water is supplied to the circulation pump through the branch port and the back-up piping. Moreover, since the priming water injection device is made to protrude outside the outer box, priming work can be easily performed without removing the front panel of the outer box.

(F) Embodiments The present invention will be described in detail below based on embodiments shown in the drawings.

In FIGS. 1 and 2, a hot water heater 1 with reheating has a can body 3 and a self-priming circulation pump 4 inside an outer box 2.
It accommodates. The can body 3 consists of an inner tube 5, an outer tube 6, and end plates 7, 8, which are hermetically joined to form a water chamber 9. Also, water chamber 9
A combustion chamber 10 is formed inside the combustion chamber 10, and a burner 11 faces downward and a chimney 12 is connected to the upper part of the combustion chamber 10. Further, the burner 11 and the chimney 12 are separated by a buttful tube 14 hanging from the upper wall 13 of the combustion chamber 10.

A heat exchange coil 15 is disposed above the water chamber 9. This heat exchange coil 15 is connected to two exhaust pipes 18 and 1 through connection ports 16 and 17 of the can body 3.
9 is connected. In addition, the additional piping 18,
A hot water inlet 20 and a hot water return inlet 21 are provided at the tips of the outer box 2 and the side plate 2 of the outer box 2, respectively.
It is made to protrude from 2. The additional piping 18 is bent into a U-shape, and the circulation pump 4 is provided at its lower end. Further, the can body 3 is provided with a hot water supply port 23, a water supply port 24, and drain ports 25, 26 in the vertical direction.

As shown in FIG.
7 are connected by hose bands 28 and 29, and a branch port 30 is provided. Also, this branch port 30
A priming water injection device 32 having an upward priming water injection port 31 is connected to the priming water injection device 32, and the priming water injection device 32 is connected to the outer box 2 through an opening 33 provided in the side plate 22 of the outer box 2.
It is projected to the outside. A hexagonal bolt-shaped priming faucet 35 is screwed into the priming water inlet 31 with a seal packing 34 interposed therebetween. This priming faucet 35
has a minus groove 36 in the head 35A, so that it can be easily attached and detached using a minus screwdriver or a coin. In addition, the priming water injection device 32
A discharge port 38 of a drain pipe 37 connected to the lower part of the circulation pump 4 is protruded below the circulation pump 4,
Water inside the drain pipes 18, 19 and the heat exchange coil 15 can be drained at any time by removing the cap 39.

When the above-mentioned reheating water heater 1 operates the burner 11 to cause combustion in the combustion chamber 10, the water supplied from the water supply port 24 to the water chamber 9 in the can body 3 receives combustion heat and becomes hot water. Become. The hot water in water chamber 9 is at hot water supply port 2.
The hot water is supplied to a bathtub or the like through a hot water supply pipe (not shown) connected to 3.

When it is necessary to refill the bath during bathing, the circulation pump 4 is operated. When the circulation pump 4 operates, the water in the bathtub flows through the hot water outlet 20 and hot water return port 21.
The water is forcibly circulated to the heat exchange coil 15 via an external pipe (not shown) connected to the water and the reheating pipes 18 and 19, and is heated using the hot water heat of the can body 3.

According to this embodiment, the front panel 40 of the outer box 2
Priming water can be easily injected into the circulation pump 4 without removing the pump. That is, since the priming water injection device 32 is made to protrude outside from the side plate 22 of the outer box 2, when priming is required, the priming faucet 35 is removed with a coin or the like, and the priming water injection port 31 is removed.
You can inject water from there. The injected water passes through the branch port 30 and the discharge pipe 18 to the circulation pump 4.
It is supplied as priming water to Further, after water is poured, the priming water inlet 31 can be easily sealed using the priming faucet 35.

(g) Effects of the invention Since this invention is configured as described above,
Priming water to the circulation pump can be easily performed using the priming water injection device protruding from the outside of the outer box without removing the front panel of the outer box, eliminating the hassle of water injection work and making it easy to use. It is excellent.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a reheating water heater showing an embodiment of the present invention, FIG. 2 is a left sectional view of the same, and FIG. 3 is an enlarged sectional view of section A in FIG. 1. . 2...Exterior box, 3...Can body, 4...Circulation pump, 10...Combustion chamber, 15...Heat exchange coil, 1
8, 19... Refueling piping, 30... Branch port, 3
1... Priming water inlet, 32... Priming water injection device,
35... Priming faucet.

Claims (1)

[Claims] 1 A heat exchange coil dedicated to the bath that exchanges heat with the hot water in the can is installed in a can dedicated to hot water supply with a combustion chamber inside, and a circulation pump is installed in the reheating piping connected to this heat exchange coil. In a water heater with recharging in which a can body and a circulation pump are housed in an outer box, a branch port is provided in the recharging piping in the outer box, and a priming water injection device having a priming water injection port is connected to this branch port. A water heater with reheating, characterized in that the priming water injection device is made to protrude outside the outer box, and a priming water tap is provided at the priming water injection port.