JPS59173651A - Hot water boiler - Google Patents

Abstract

PURPOSE:To prevent a sudden drop of the temperature of delivered hot water in case a boiler needs to be burnt further while delivering hot water by providing a baffle plate in a hot water reservoir between an upper opening of a pipe connecting the lower parts of the reservoir and a hot water outlet in the top of the reservoir. CONSTITUTION:In a hot water reservoir 1 having a water inlet 7 in a lower part and a hot water outlet to deliver hot water in an upper part, a heat source 2 to heat the water is disposed in a pipe connecting the lower and upper parts of the reservoir 1. A diffuser plate 11 is disposed in the reservoir 1 in a position opposite to the upper opening into the reservoir of the upper end of said pipe, and a baffle plate 12 is disposed on the inner wall of the reservoir 1 in a position between the upper opening of said pipe and the hot water outlet 8. As a result, the hot water produced by the heat source stays in a layer in the upper part of the reservoir 1, and a hot water storage amount can be varied as necessary to minimize a heat loss. When it becomes necessary to further burn the boiler while hot water is being delivered, warm water at lower temperature is prevented from directly flowing into the hot water outlet by the buffer plate 12 at the moment when the heat source is ignited, inhibiting a sudden drop of hot water supply temperature.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a hot water storage tank and hot water as a heat source. 11; Relating to a hot water boiler using a rock.

Conventional configuration and its problems Conventionally, this type of hot water boiler has a hot water tank 1 and a heat source 2 as its main components, and the hot water tank 1 is connected to a heat source 2 by a warpipe 3, as shown in Fig. 4. There is a circulation pump 4. A check valve 5 was connected. Further, the heat source 2 and the upper part of the hot water storage tank were connected by a return pipe 6 to form a circulation path. A water supply core was provided at the bottom of the hot water storage tank 1, and a hot water supply port 8 was provided at the top.

With this configuration, first, in order to boil water in the hot water storage tank 1, water is introduced into the heat source 2 by the circulation pump 4 and then ignited. The water that has passed through the heat source 2 and is heated is sent again to the upper part of the hot water storage tank through the hot water tap 6 and is gradually heated up. When the set temperature is detected by a thermistor 9 attached to the lower part of the hot water storage tank 1, the pump 4 is stopped and combustion is also stopped. At the same time when a faucet 10 provided at the end of the hot water supply port 8 is opened, water flows into the hot water storage tank 1 from a water supply lower directly connected to a water pipe and hot water is discharged from the hot water supply port 8 like a piston. At this time, when the hot water is continuously tapped and the hot water level is pushed upward, the thermistor 9 detects that the temperature is below the set temperature, and the heat source 2
Circulation pump 4 starts operating to reheat the heat by
be done.

In the above-mentioned hot water boiler, the hot water that blows out from the return pipe 6 when boiling the inside of the hot water storage tank is forced to convect inside the hot water storage tank and gradually boils up the whole tank, so for example, the capacity of the hot water storage tank 1 Even when the entire amount was not needed, the entire amount of hot water had to be stored at all times.

Therefore, the heat radiation loss from the hot water storage tank, which is unique to hot water boilers, cannot be reduced, and the use of the hot water boiler is uneconomical. It's too bad to boil the whole thing, and due to the difference in density, a temperature distribution of -1- below tends to occur inside the hot water tank 1.
In particular, there was a strong tendency for a layer of high-temperature hot water to form in the area closer to the return pipe 6. When hot water is supplied from the hot water storage tank 1 having such a temperature distribution, the hot water temperature changes during hot water supply, which is very uncomfortable when using a hot water tank, for example. In particular, when reheating is performed during hot water supply, low-temperature water at the initial stage of ignition is ejected from the hot water outlet 6 and a portion of it flows directly into the hot water supply opening, resulting in a sudden drop in hot water temperature F. The temperature drop is 10
In some cases, it was more than normal.

Furthermore, when the entire amount of hot water in the hot water storage tank is used up, that is, when the hot water tank runs out, this type of hot water boiler has the disadvantage that the entire hot water storage tank 1 must be boiled, resulting in a long waiting time.

Purpose of the Invention The present invention solves such conventional problems by stratifying hot water produced from a heat source from the upper part of a hot water storage tank, and varying the amount of hot water stored as necessary to minimize heat radiation loss. The purpose is to reduce the width of the hot water storage temperature distribution as much as possible, and to minimize changes in the hot water supply temperature.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a hot water tank in which a hot water storage tank equipped with a water inlet and a hot water inlet, an outgoing pipe, a circulation pump, and a returning pipe are connected in this order. The opening is provided at the top of the hot water storage tank, the return pipe is connected to the top surface of the hot water storage tank, and a diffusion plate is provided in the hot water storage tank so as to face the opening of the return pipe. Also hot water supply 1
A shielding plate is provided inside the upper surface of the hot water storage tank on a line connecting the top of the hot water storage tank and the tip of the return pipe.

With this configuration, the flow velocity of the hot water spouted from the return pipe is attenuated by the diffusion square plate, and the flow direction spreads from downward to horizontal, so that high-temperature hot water can be stratified from the upper part of the hot water storage tank. Therefore, the amount of stored hot water can be set freely.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the figure, the same parts as in FIG. 4 are given the same numbers.

In the figure, an outgoing pipe is connected to the other lower part of a hot water storage tank 1 with a water supply lower provided at its lower part, and a circulation pump 4° heat source 2. Connect in this order to the return pipe 6. A hot water supply port 8 is provided at the top of the hot water tank.
Connect the upper surface 5 of the hot water storage tank and the return pipe 6.

A diffusion plate 11 is provided in the hot water tank opposite to the opening at the tip of the return pipe 6. Further, a shielding plate 12 is provided inside the upper surface of the hot water storage tank on a line connecting the tip of the return pipe 6 and the inlet 8. Further, thermistor 9 is a sanimistor for full hot water storage, and thermistor 1 is a thermistor for half hot water storage, both of which are fixed to the surface of the hot water storage tank.

With the above configuration in place, the operation for boiling the inside of the hot water storage tank 1 will be explained first. In the figure, the circulation pump 4 is operated to suck water from the lower part of the hot water storage tank through the outgoing pipe 3, and the heat source 2. Return 6
Return to hot water tank 1. Upon detecting this flow, the heat source 2 is ignited and starts combustion.

When the hot water heated by the heat source 2 is ejected from the return pipe 6 into the hot water storage tank 1, it collides with the diffusion plate 11, and the flow is turned sideways and the flow velocity is attenuated. Hot water is stored from the top of the tank, above the water in the tank, and is gradually stratified throughout the tank without convection or stirring. Schematic diagrams of the flow of hot water in this case are shown in Figures 2 and 3.
The hot water whose flow direction has been changed by the diffusion plate 11 passes through the shielding plate 12
Therefore, the water does not flow directly into the hot water supply port 8, but after being diffused to some extent, it flows near the hot water supply port 8. This phenomenon remains the same both during boiling and during hot water supply.

When the layer of hot water comes down to the position of thermistor 9 using the stratification method described above, it is detected that half of the hot water storage is completed, and when the hot water is further stratified up to thermistor 9, it is detected that the full hot water storage is completed. Ru.

Although not shown, the amount of hot water stored can be changed using a button on the controller or the like.

When the boiled hot water is dispensed as described above, water flows in from the water supply lower and pushes up the hot water in the hot water storage tank 1. A layer of water forms at the bottom of the hot water storage tank, and for example, when the hot water is fully stored, thermistor 9
When a layer of water is formed, reheating starts and circulation pump 4
rotates, and the heat source 2 is ignited again.

Therefore, according to this embodiment, when boiling immediately, the return pipe 6 is turned off.
The flow of the hot water spouted from the hot water tank is sufficiently expanded by the diffusion plate 11 and the flow velocity is attenuated, so that there is no convection or stirring inside the hot water storage tank, and the hot water is gradually stratified from the top of the hot water storage tank. Therefore, by using two thermistors for detecting the hot water temperature in this embodiment, the amount of stored hot water can be divided into two levels. Therefore, heat radiation loss from the hot water storage tank 1 can be minimized and economical efficiency can be improved. In addition, since the temperature distribution of stored hot water is small, changes in the hot water supply temperature are also small, making it extremely uncomfortable to take a shower or the like. Furthermore, even if one firing starts during hot water supply, the shielding plate 12 prevents the water from flowing directly into the hot water supply port 8 when the heat source is ignited, resulting in a rapid drop in the hot water temperature. There isn't. In addition, even in the event that hot water runs out, hot water is stored in the second tank J, so hot water can be obtained in a short time.

Effects of the Invention As described above, the hot water boiler of the present invention provides the following effects.

(1) The direction of flow of hot water from the heat source to the hot water storage tank is made horizontal by the diffusion plate, and the flow velocity is attenuated.

Therefore, the hot water is stratified from the top without convection or stirring inside the hot water storage tank, so the amount of hot water stored can be set freely. However, at the same time, heat dissipation loss can be suppressed to a minimum, so economical efficiency can be improved.

(2) Since hot water is stratified from the top of the hot water storage tank, even if hot water runs out, hot water can be obtained in a short time.

(3) Since hot water is stratified from the top of the hot water tank without convection, the hot water temperature distribution is small and the hot water supply temperature is stable.

(4) When reheating occurs during hot water supply, the shielding plate prevents the low-temperature water generated when the heat source is ignited from directly flowing into the hot water supply inlet, so the hot water temperature does not drop suddenly.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a hot water boiler that is an embodiment of the present invention, Fig. 2 is a schematic diagram of the flow of hot water in the upper part of the hot water storage tank, and Fig. 3 is a view of the upper part from the lower part of the hot water storage tank. Schematic diagram of the flow of hot water,
FIG. 4 is a partial sectional view of a conventional hot water boiler. 1...Hot water tank, 2...Heat source, 3...
... Outgoing pipe, 4... Circulation pump, 6... Return pipe, 7... Water supply port, 8... Hot water supply port, 11.
... Diffusion plate, 12... Shielding plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a hot water storage tank having a water supply port at the bottom and a hot water supply port at the top for taking out hot water, a heat source for heating water is provided in the middle of a pipe connecting the bottom and top of the hot water storage tank, and the top end of the pipe is provided with a heat source for heating water. A diffusion plate is provided in the hot water storage tank facing the upper opening facing into the hot water storage tank, and a shielding plate is provided on the inner surface of the hot water storage tank between the upper opening of the pipe and the hot water supply. hot water boiler.