JPS62183723A - Hot water feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water heater that uses a centrifugal pump to dispense hot water.

2. Description of the Related Art The present inventors have filed an application for a water heater using a centrifugal pump as shown in FIG. To explain its configuration,
A heater 2 for heating the water in the container 1 is attached to the lower side of the container 1 for storing hot water.
A centrifugal pump 3 is provided to pump up the water inside, and hot water is poured out from the spout lower from the discharge port 4 of the centrifugal pump 3 via a discharge vibro provided between the exterior body 6 and the container 1. It is a structure.

Problems to be Solved by the Invention This type of structure has the advantage that the discharge amount is stable because water is directly pumped up by the centrifugal pump @3. However, although the temperature of the hot water in the container 1 is high, the temperature of the hot water from the discharge port 4 of the centrifugal pump 3 to the inside of the discharge vibrator 5 is quite low, so there is a problem that the hot water temperature is particularly low when a small amount of hot water is discharged. there were.

This is because, due to the structure of the centrifugal pump 3 that pumps hot water, the water level in the discharge vibro is always at the same level as in the container 3, so when heating from water, the water in the discharge vibro does not get very hot. It's for a reason.

An object of the present invention is to provide a water heater that solves these problems.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a method in which a discharge pipe leading from the discharge port of the centrifugal pump to the water inlet is provided in close contact with the side wall of the container.

Effect According to the above configuration, the water in the discharge pipe leading from the discharge port of the centrifugal pump to the water inlet is also heated to almost the same temperature as the hot water in the container through heat transfer through the hot water in the container and the side wall of the container. can do.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, reference numeral 8 denotes an exterior main body of the water heater, in which a container 9 for storing hot water is provided. Reference numeral 10 denotes an inner stopper attached to close the mouth of the container 9. Reference numeral 11 denotes an upper lid that is attached to the upper part of the exterior main body 8 so that it can be opened and closed. 1
Reference numeral 2 designates a check valve 12, which passes through the inner stopper 1o and communicates with the inside of the container e, and also communicates with the atmosphere through a boiling detection section 13. 14 is a motor provided at the bottom between the exterior main body 8 and the container 9. A centrifugal pump 15 is driven by a motor 14, and its suction port 16 communicates with the center of the bottom of the container 9. 17 is a discharge port of the centrifugal pump 15, and hot water is pumped upward through a discharge pipe 18 and poured from a water inlet 20 of the exterior main body 8. The discharge pipe 18 is provided in close contact with the side wall of the container 9. 19
is a heater and is fixed to the back bottom surface of the container 9.

Reference numeral 21 denotes a starting switch for starting the motor 14, which is activated via a rod 23 when the push button 22 is pressed. 24 is a compression type spring, and this spring 24 always urges the rod 23 upward.

Next, the centrifugal pump 15 will be explained with reference to FIGS. 2 and 3. Reference numeral 26 denotes an impeller composed of radial blades 26 and magnets 27. On the outer periphery of this impeller 26, a pump chamber 2 is arranged concentrically with the impeller 25 with a certain gap (1).
8 is formed. The magnet 27 is opposed to the drive-side magnet 3o via the wall 29 of the pump chamber 28. The magnet 30 is fixed to the shaft of the motor 14 and is magnetically coupled to the magnets 27 and 30, so that the power of the motor 14 is transmitted to the impeller 26.

The operation of the above configuration will be explained next.

When hot water is poured into the container 9 with hot water stored in the container 9, the push button 22 must be depressed to turn on the start switch 21 and energize the motor 14. By rotating the motor 14, the magnet 27.30
are magnetically coupled, the impeller 25 rotates, sucks the hot water in the container 9 through the suction port 16 of the centrifugal pump 15, enters the pump chamber 28, is pushed outward by the impeller 25, and is given a whirlpool. Due to the force, the water is poured out from the discharge port 17 through the discharge pipe 18 and out through the water inlet 2o. Since the discharge pipe 18 is provided in close contact with the container 9, the temperature of the water in the discharge pipe 18 is almost the same as that in the container 9, and therefore the water in the discharge pipe 18 is cold. That will no longer be the case.

Effects of the Invention As described above, the present invention takes advantage of the advantages of using a centrifugal pump, and can also bring the water in the discharge pipe to almost the same temperature as the hot water in the container. Therefore, even when a small amount of hot water is discharged, there is no problem that the temperature of the hot water discharged from the spout is low, and hot water can be directly supplied using the centrifugal pump system.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a water heater according to an embodiment of the present invention, Fig. 2 is a front view showing a part of a centrifugal pump incorporated in the apparatus in cross section, and Fig. 3 is a partial cross-sectional view of the centrifugal pump. FIG. 4 is a sectional view showing the feeding device of the prior application. 8... Exterior main body, 9... Container, 15.
...Centrifugal pump, 17...Discharge port, 18
...Discharge pipe, 19 ... Heater, 20 ... Water inlet. Name of agent: Patent attorney Toshio Nakao and 1 other person8-
External main salary Iq ---pp #Heag π-note 7 mouth Fig. 2 Fig. 3

Claims (1)

[Claims] An exterior body, a hot water storage container provided in the exterior body, a heater for heating the water in the container, and a heater provided at the bottom of the container to pump the hot water in the container from the water inlet. A hot water supply device that includes a centrifugal pump for pouring water, and a discharge pipe that leads from the discharge port of the centrifugal pump to a water inlet, and is provided in close contact with the side of a container.