JPS58123041A - Storage type hot water supplier - Google Patents

Abstract

PURPOSE:To make it possible to supply hot water of a large capaciy with low input ability by separating a hot water storage tank from a heat source part and disposing a pump capable of controlling the quantity of circulated hot water in a circuit introducing high temperature water from the lower part of the hot water storage tank to the substantially middle part of the hot water storage tank via a heat exchanger. CONSTITUTION:A burner 1 and a heat exchanger 2 of a fin piped type heated by the operation of this burner 1 are encircled by a casing 3, and disposed beneath a hot water tank 7. To one end of the casing 3 is connected an exhaust cylinder 4 having at its tip end a fan 5 and an exhaust top 6. One end of the heat exchanger 2 is connected to a water supply port 8 beneath the hot water storage tank 7 through a pump 9 capable of varying the quantity of circulation, and another end of the heat exchanger 2 to a heated water outlet port 11 above the hot water storage tank 7. A hot water outlet pipe 10A provided with a number of small holes 10B as an extension of a hot water outlet pipe 10 is disposed at the outlet port 11 within the hot water storage tank 7. The ON/OFF of the above burner 1 is controlled based on the output signal from a temperature detector 12 provided at the upper part of the hot water storage tank 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides low input (e.g. 10000 kCa
This is a hot water storage type water heater that has a large capacity (for example, 2 oool) of hot water storage and is used for general home or commercial purposes.

The present invention relates to a hot water storage type water heater with low input capacity and large capacity. This hot water storage type water heater had the following drawbacks.

(1) Since the amount of hot water stored is large, it takes a long time to boil the water.

(2) The entire amount of hot water (e.g. 2oo1') must be boiled even if a small amount of hot water (e.g. 50 to 601 L) is not used. (3) When the entire amount of hot water is used up in a short time Even if you want a little more hot water, you won't be able to get hot water right away because it takes a long time to boil.

Currently, there are the following conventional examples of hot water storage type water heaters that pursue these points.

In Fig. 4, numeral 13 is a hot water storage tank and a hot water outlet.

3 is a water supply port, and 2 and 8 are heat exchangers installed in the hot water storage tank 7. 1 and 4 are burners.

The operation will be explained below: (1) When a large amount of hot water is required to be stored, such as during winter, when a large amount of hot water is required, almost all of the hot water can be stored by operating the burner 1 installed at the bottom of the hot water storage tank 7. It is possible to uniformly heat a quantity of hot water and obtain high-temperature hot water6 (or it is also possible to operate burner 4 at the same time). (2) When a small amount of hot water storage is required.

When a small amount of stored hot water is sufficient, such as during summer, or when a large amount of high-temperature hot water is used up and high-temperature hot water is required in a relatively short period of time, burner 4 is operated and the hot water located near and above heat exchanger 8 is operated. You can get hot water.

The disadvantages of the above conventional example are as follows: (a) There is only one concept for storing a small amount of hot water (for example, only 5σ0. Multiple control (son, 1oo1) is difficult in terms of configuration and cost.

(b) Since a heat exchanger is installed inside the hot water storage tank, it is structurally difficult to increase capacity. Therefore, it is difficult to obtain hot water in a short time.

The following conventional example will be explained.

In FIG. 6, 2 is a heat exchanger, and 2 is a heat exchanger inlet located at the bottom of the hot water storage tank 7.

Reference numeral 11 denotes a heat exchanger outlet located at the upper part of the hot water storage tank.

Next, the operation will be explained.

The hot water that enters from the inlet portion 8 and is heated by the heat exchanger 2 enters the upper part of the hot water storage tank 7 from the heat exchanger outlet portion 11 and is circulated. In this case, if only a small amount of hot water is stored, it is possible to obtain almost uniform high-temperature hot water from the vicinity of the heat exchanger outlet 11 upwards, but if a large amount of hot water is to be stored using this method, the hot water storage tank 7 as shown in FIG. The disadvantage is that the temperature distribution inside the top and bottom is extreme, and the temperature of the hot water at the time of tapping is unstable.

The present invention uses low input (e.g. 10,000 kcal/h)
) type of hot water storage type water heater having a large capacity (for example, 2,007 liters of hot water storage capacity), the purpose is to achieve the following points by controlling the amount of circulation between the hot water storage tank and the heat exchanger.

(1) Large-volume hot water storage and small-volume hot water storage can be used properly depending on the purpose of use, enabling economical use.

(2) A small amount of hot water can be obtained in a short time.

(3) Stabilize the hot water temperature in both large-volume and small-volume hot water storage.

In the present invention, the heat exchanger and burner unit are installed outside the hot water storage tank, the water supply port to the heat exchanger and the hot water supply port from the heat exchanger are connected to the hot water storage tank, and a pump capable of controlling the circulation rate is connected to this circuit. A pipe with multiple small holes is installed from the hot water supply inlet into the hot water storage tank, and the small holes are oriented downwards in the hot water storage tank, resulting in a uniform amount of hot water at high temperatures when storing a large amount of hot water or when storing a small amount of hot water. The present invention provides a hot water storage type water heater that can obtain the following.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. 1 is a burner and 2 is a fin pipe heat exchanger.

The burner 1 and the fin-type heat exchanger 2 are surrounded by a case 3 in an appropriate arrangement and are installed at the lower side of the hot water storage tank 7. An exhaust pipe 4 is provided at one end of the case 3, and a fan 5 and an exhaust top 6 are provided at the tip. One end of the heat exchanger 2 is a water supply port 8, which is connected to a hot water storage tank 7 via a pump 9 that can vary the amount of circulation. The other end of the heat exchanger 2 is connected to a heated water outlet 11 via a hot water pipe 1o.
is connected to. Further, as an extension of the hot water supply pipe 10, a hot water outlet pipe 1om in the hot water storage tank having a plurality of small holes 10B is fixed to the heated water outlet 11. The position of the hot water tap pipe 1om can be freely selected. 12 detects the temperature of hot water in the hot water storage tank 7 and turns the burner 1 ONJ, l'-0FFJ.
This is a temperature sensor that performs control. Reference numeral 13 denotes a hot water outlet provided at the upper part of the hot water storage tank 7.The operating aspects of the above configuration will be described below.

(1) In the case of storing a large amount of hot water, if the burner 1 is ignited and the circulation pump 9 is activated, the hot water storage tank 7
The water inside enters the heat exchanger 2 through the water supply port 8 and is heated. The hot water passed through the heat exchanger 2 and heated is sent to the hot water supply pipe 1
Hot water is ejected from the hot water through the heated water outlet 11 from a plurality of small holes 10B provided in the outlet pipe 1om toward the lower part of the hot water storage tank 7 almost equally from each small hole. In this case, the ability of the circulation pump 9 is maximized, and the circulation amount is set to a maximum of 10 m1n, for example, to perform heat exchange within the heat exchanger 2. If the capacity of burner 1 is constant, hot water supply pipe 1
The temperature and speed of the hot water passing through the water are determined.

Further, high-temperature hot water is ejected downward into the hot water storage tank 7 at a certain speed from a plurality of small holes 10B provided in the hot water tap pipe 10m. The high-temperature hot water spouted into the hot water storage tank 7 is roughly divided into a component that moves to the top of the hot water storage tank 7 by natural draft while exchanging heat with surrounding water, and a component that moves downward depending on the jetting speed. Further, in the hot water storage tank 7 as a whole, a "flow" occurs from the small hole group of the hot water outlet pipe 10m toward the water supply port 8, and circulation is performed. The higher the circulation rate, the lower the temperature of the hot water spouted from the plurality of small holes 10B, and the smaller the upward draft. Further, diffusion and mixing within the hot water storage tank 7 is promoted, and a uniform hot water temperature distribution can be obtained as a whole.

(2) When storing a small amount of hot water.

When the burner 1 is ignited and the circulation pump 9 is operated, water in the hot water tank 7 enters the heat exchanger 2 through the water supply port 8 and is heated. The hot water that has passed through the heat exchanger 2 and is heated flows from the hot water supply pipe 1o, through the heated water outlet 11, and from the plurality of small holes 10B provided in the hot water outlet pipe 10m toward the bottom of the hot water storage tank 7. It is ejected almost evenly from the small holes.

In this case, if the capacity of the circulation pump 9 is controlled and the circulation amount is made relatively small (for example, 3 i 7 min ~ 41/
m1n) The speed of the hot water passing through the hot water supply pipe 1o becomes small, and the temperature of the hot water becomes higher compared to the above-mentioned "case of large amount of hot water storage". Therefore, the hot water spouted from the small hole group of the hot water tap pipe 10m has a draught effect, and the water existing from the vicinity of the hot water tap pipe 10m above is rapidly exchanged heat, and the temperature rise is promoted.

On the other hand, since the amount of water circulated below the vicinity of 10m of the hot water tap pipe is small, sufficient heat transfer is not carried out, and as a result, a predetermined amount (for example, 50%) of high temperature is generated in the upper part of the hot water storage tank 7 from the vicinity of 10m of the hot water tap pipe as a boundary. Hot water can be obtained in a relatively short time.

In the present invention, a plurality of small holes IQ are provided in 10 mm of the tap water pipe.
Since hot water is divided into small pieces and heat exchanged with the water in the hot water storage tank 7, a more uniform hot water temperature can be ensured whether a large amount of hot water or a small amount of hot water is stored.

Further, as a method of controlling the circulation amount of the circulation pump 9, the same effect can be obtained by changing the flow path resistance by using pulp or the like.

Furthermore, if you control the circulation amount in multiple stages, you can set the hot water storage amount to, for example, 501, 1oo1, etc. when storing a small amount of hot water, and store a large amount of hot water to 20.
01, and can be expected to diversify the amount of hot water stored.

As mentioned above, by realizing both the functions of large-volume hot water storage and small-volume hot water storage in the same hot water storage tank, usability can be considered as follows.8 - In summer, small amount of hot water storage is mainly 1ool or 501 - - In winter, large amount of hot water storage Mainly 2001.

In other words, it can be used depending on the season.

As is clear from the above description, according to the present invention, the hot water storage tank and the heat source are separated, and the circulation amount can be controlled in the circuit that introduces high-temperature water from the bottom of the hot water storage tank through the heat exchanger to the approximately middle part of the hot water storage tank. The following effects can be obtained by arranging a suitable pump.

As explained above, according to the present invention, the following effects can be expected.

(1) The ability to store large amounts of hot water and small amounts of hot water at the same time enables economical use and is extremely economical.

(2) High-temperature hot water can be obtained in a short time when storing a small amount of hot water. (3) It can be used according to the hot water supply load, making it extremely convenient to use.

(4) Since the hot water storage tank and heat source are separated, products can be diversified according to the capabilities of each.

[Brief explanation of the drawing]

Figure 1 is a schematic sectional view of a hot water storage type water heater according to an embodiment of the present invention, Figure 2a is a boiling performance diagram when storing a large amount of hot water, Figure 2 is a hot water discharging performance diagram, and Figure 3d is a diagram of the same hot water output performance. Figure 3 is the boiling performance diagram when storing a small amount of hot water, Figure 4 is a sectional view of a conventional hot water storage type water heater equipped with heat exchange sections at the top and bottom, and Figure 6a is the same as above. High-temperature hot water is introduced only to the upper part of the hot water storage tank (Figure 5, a cross-sectional view of a conventional hot water storage type water heater, is based on the same hot water output performance diagram as above). 1...Burner, 2...Heat exchanger, 7.
River...Hot water tank, 8...Water inlet, 9...
Circulation pump, 10...Hot water pipe, 11...
... Heating water outlet, 1 ohm ... Hot water pipe, 1
0B...Small hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure (5L) ηIl when closed (jJ out) 1 drug Figure 3 ('C) 勺 Lorre call-B2 de 8i Figure 4 Figure 5 exit "r';/h 1% r#

Claims (1)

[Claims] The heat exchanger and burner unit are installed outside the hot water storage tank, the water inlet of the heat exchanger is fixed to the bottom of the hot water storage tank, the heated water outlet is fixed to approximately the middle of the hot water storage tank, and a pump that can control the circulation rate is installed in this circuit. A hot water storage type water heater is equipped with a pipe having a plurality of small holes from the heated water outlet in the substantially middle portion into the hot water storage tank, and the small holes are directed downward from the hot water storage tank.