JPS5938547A - Hot-water boiler - 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 Industrial Application The present invention separates a hot water storage tank and a heat source, and uses a circulation pump to blow out high-temperature hot water obtained from the heat source from two parts of the hot water storage tank to generate high-temperature hot water. The present invention relates to a hot water boiler in which water is stratified, and the boiler structure is equipped with a flow rate attenuator in the ejection part.

Conventional configuration and problems thereof A conventional hot water boiler is configured as shown in FIG. That is, there is a hot water storage tank 3 having a hot water outlet pipe 1 in the upper part and a water supply pipe 2 in the lower part, and a circulation pump 4. It has a structure in which the heat source parts 5 are successively connected by connecting pipes 6 and 7°8, and the connecting pipe 8 is connected to the upper surface of the hot water storage tank 3 to form a heating circuit.

In this structure, the /ζ high temperature hot water obtained in the heat source section 5 is stored from the street part of the hot water storage tank 3.
In order to boil the water in the tank to a high temperature, the conditions for ejecting water from the connecting pipe 8 to the hot water tank 3 must be carefully adjusted.
The disadvantage is that the temperature distribution between the top and bottom of the chamber is uneven. For example, when the flow rate of the circulating flow rate is high, the diffusion within the hot water storage tank 3 becomes more intense and becomes more non-uniform. This is particularly noticeable when the circulation flow rate is large. The performance in this case is shown in FIG.

Furthermore, when dispensing hot water after a while after boiling, if the heat source section 6 is currently at outside temperature (winter Q~
When operating under conditions close to 6°C), since an instantaneous water heater is used as the heat source, low-temperature water is pumped into the steady-state trench (Fig. 3 shows a typical instantaneous water heater). There is a drawback that the temperature of the hot water in the hot water storage tank 3 (indicating the start-up performance of the boiler) decreases compared to the temperature when it is boiled, and the temperature of the hot water that comes out of the hot water drops suddenly in some areas. An example of this performance is shown in FIG.

Next, in a structure in which high-temperature hot water obtained at the heat source is stratified from the soil part of the hot water storage tank, in order to alleviate the sudden drop in hot water temperature in some parts due to the mixing of low-temperature water when the heat source starts up. There is a conventional example as shown in FIG. In other words, at the tip of the hot water supply pipe 8, a small hole 1 is formed in a hollow cylindrical shape and extends over the entire side wall.
4, a bottomless distribution cylinder 15 is provided, and the height extends from the top to the bottom of the hot water storage tank 3. This is due to forced convection by the circulation pump 4, so that all of the water in the hot water storage tank 3 is under dynamic pressure. Therefore, when the jet flow velocity is large,
It will be ejected from the lower part of the distribution cylinder 16 both during the transient period of start-up and during the steady state. This can prevent the entire area of the hot water storage tank from being drenched due to low-temperature water being mixed in, but it also prevents high-temperature water from being stratified from the top when boiling the water in the hot water storage tank.

In addition, when the jetting flow velocity is small, the upper stratification of high-temperature hot water is established in the steady state, but the low-temperature water in the transient period of rise is sent from the upper part of the distribution pipe 16 to the lower part, and is
The temperature will rise as a result of heat exchange with the hot water inside the tank, and the temperature at the bottom of the hot water storage tank will increase. Area where the distribution is wide and the hot water temperature is stable (effective hot water storage amount)
will decrease. However, it is somewhat better than the example shown in FIG. A performance example in this case is shown in FIG. Since this conventional example is a heating circuit, some adverse conditions can be tolerated.

Purpose of the Invention The present invention is intended to eliminate these conventional drawbacks, and is to minimize the distribution of hot water temperature during boiling, especially when the circulation flow rate is large, and to prevent a sudden drop in the temperature of the hot water when dispensing hot water. The purpose of this invention is to minimize the amount of noise, and to realize it with easy installation and a simple configuration.

Structure of the Invention In order to achieve this object, the present invention employs a method in which the heat source section and the hot water storage tank are separated, and hot water from the heat source section is sent from the upper part of the hot water storage tank through a flow rate attenuator using sintered metal. It is arranged like this.

With this configuration, during boiling, the flow velocity damping body
Attenuating the force of the circulation pump and setting conditions to achieve a flow velocity that does not cause convection within the hot water storage tank (for example, replacing dynamic pressure with static pressure), and reducing the vertical flow using a flow velocity attenuator. By ejecting the hot water extremely uniformly in the horizontal direction, the temperature stratification of the high-temperature water is established, and the temperature distribution can be minimized. Furthermore, even if there is a sudden drop in the temperature of hot water in some areas during taping, the flow velocity attenuator is configured so that the initial velocity is slow and the water is spouted in a dispersed manner. This prevents the water from dispersing over a wide area within the hot water storage tank, and drastically reduces the chance of a sudden drop in hot water temperature.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 7 to 10. In the figures, parts that are the same as those in FIG. 1, which is a conventional example, are given the same numbers.

In the figure, the hot water storage tank 3 has a hot water outlet pipe 1. A water supply pipe 2 is provided at the bottom. From the lower part of the hot water storage tank 3, the water inlet pipe 6 is branched into 6a and 6b via a check valve 1o, and connected to circulation pumps 4a and 4b, and a heat source section a, respectively.

tsb, branch pipes sa and sb of the hot water supply pipe 8, and the hot water supply pipe 8 are arranged in this order to form a heating circuit.

It has a bottomed hollow cylindrical flow velocity damping body 12d1, the side wall is made of sintered metal, and has a large number of small ejection holes 13, and the hot water supply pipe 8
The high-temperature hot water from the hot water supply pipe 8 is fed vertically to the hot water tank 3 downward from the top of the road in the hot water tank 3, and the spouting direction is horizontal to the hot water tank 3. It is arranged so that

The temperature thermistor 9 is provided on the lower side wall of the hot water storage tank 3. Further, 11a and 11bid: flow rate regulating valves, which are respectively provided on the upstream side of the heating circuit.

Next, in the above configuration, the operation will be explained separately during boiling and dispensing.

(1) At the time of boiling When the water temperature in the hot water storage tank 3 is lower than the set water temperature, the temperature thermistor 9 senses this and the blubber circulation pump 4a is activated.

A signal is sent to 4b to drive it. Circulation pump 4a.

When 4b is driven, the heat sources 5a and 5b are ignited by detection by flow rate switches (not shown) provided in the heat sources sa and sb, and the water is circulated and heated. After that, when the water temperature in the lower part of the hot water storage tank 3 rises to the set hot water temperature, the temperature thermistor 9 senses this and stops the circulation pumps 4a, 4b. circulation bonder 4
a.

4b stops, the heat source section 6a is detected by the flow rate switch.
, 5b extinguishes the fire.

In this configuration, the flow rates of the circulation pumps 4a and 4b are constant,
The amount of combustion in the heat sources 5a and 6b is proportionally controlled so that the temperature of the hot water fed into the connecting pipe remains constant.

During this boiling process, the flow rate attenuator 12 is set on the road of the hot water storage tank, and the sintered metal part (spouting area) is made large, so that the high temperature hot water from the hot water supply pipe 8 is By uniformly ejecting vertical jets horizontally from the entire area of the many small jet holes in the side wall, and by creating jet conditions close to static pressure, convection within the hot water storage tank 3 can be prevented and there will be no temperature distribution. Upper stratification of high-temperature water can be achieved.

The performance at this time is shown in FIG.

(2) When dispensing hot water After the hot water in the hot water storage tank 3 has been boiled to a predetermined temperature (for example, 80°C), after a while, the hot water in the heating circuit, including the hot water in the heat source, reaches the outside temperature. When the faucet (not shown) at the tip of the hot water supply pipe is opened and hot water is tapped when the water temperature has reached the water temperature, low-temperature water is pumped through the water supply pipe and raised from the upper hot water pipe until the specified temperature is reached. hot water is sent out.

After that, the temperature thermistor 9 provided on the side wall of the hot water storage tank 3 is
is sensed and sends a signal to the circulation pumps 4a and 4b to drive them. When the circulation pumps 4a, 4b are driven, the heat sources sa, 6b
The heat source parts 5a and 5b begin to ignite upon detection by the flow rate switch provided in the heat source, and reheating is started.

At the beginning of this reheating, low-temperature water during the transition of the rise of the heat source parts eia and 5b is sent from the hot water pipe 8.

In this process, the flow rate attenuator 12 is provided at the upper part of the hot water storage tank 3, and it is made of sintered metal in the shape of a hollow cylinder with a bottom, and a large number of small ejection holes are provided in the vertical vertical side walls. Therefore, since the flow velocity is close to static pressure and the jet is dispersed rather than concentrated, the low-temperature water from the hot water supply pipe 8 during transient periods can be prevented from spreading over a wide range within the hot water storage tank 3, and the hot water can be Sudden drops in temperature can be greatly reduced. The performance at this time is the first
Shown in Figure 0.

Effect of the invention According to the hot water boiler of the present invention, the following effects can be obtained.

(1) Convection in the hot water storage tank can be prevented by installing a flow rate attenuator using sintered metal in the upper part of the hot water storage tank and creating jetting conditions close to static pressure and low flow speed. Since the upper temperature stratification of high-temperature water at the time of boiling is possible, it becomes possible to obtain high-temperature water in a short time (high-temperature water can be obtained quickly), which improves usability.

(2) The flow rate attenuator allows extremely uniform and distributed jetting to prevent diffusion of low-temperature water in the hot water storage tank when the heat source is turned on, thereby stabilizing the hot water temperature when hot water is tapped.

(3) Using sintered metal: It is easy to install, has a simple structure, and can attenuate pressure and flow velocity.

(4) The method does not linearly control the circulation pump from startup to steady state or install a flow control valve in the hot water supply pipe I to ensure performance during boiling and dispensing.
All of the objectives are achieved with a simple configuration, and this hot water boiler can be realized at an extremely low cost.

(6) Since the heating circuits are connected in parallel, complete stoppage of functionality can be avoided even in the unlikely event of a failure.
It has advantages during maintenance.

(6) It is possible to provide a hot water boiler with high thermal energy efficiency, which has a large amount of hot water with a stable temperature (hot water storage function) and a high-temperature hot water upper stratification system (instantaneous function).

[Brief explanation of drawings]

Figure 1 is a block diagram of a conventional hot water boiler, Figure 2 is its boiling performance diagram, Figure 3 is a typical start-up performance diagram for an instantaneous water heater, and Figure 4 is its hot water temperature performance. Figure 6 is a configuration diagram of another conventional example, Figure 6 is a hot water temperature performance diagram of another conventional example,
FIG. 7 is a configuration diagram of a hot water boiler according to an embodiment of the present invention, and FIG.
The figure is an enlarged cross-sectional view of the same main part, FIG. 9 is a boiling performance diagram of the same, and FIG. 10 is a hot water tap performance diagram of the same. 3...Hot water tank, 4a, 4b...Circulation pump, 5d. 6b...Heat source part, 8...Hot water pipe, 12
...Flow velocity attenuator, 13...Ejection small hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 'Figure 3, i-bottle, 7II5, No. 411 Shiu-no-machi-yami, Figure 6, Section 7, Amendment to Procedures, 1939-1939, 7rh, 7B, Commissioner of the Japan Patent Office 1 Display of the case 1982 Patent Application No. 150572 2 Name of the invention Hot water boiler 3 Person making the amendment η “Relationship with the case Patent issue
Wish Pillar Location 1006 Kadoma, Kadoma City, Osaka Name Name (582) Representative of Matsushita Electric Industrial Co., Ltd.
Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Detailed explanation of the invention in the specification subject to amendment 6 Column 6, Specification of contents of the amendment, page 9 Insert the legal text after "as shown in Figure 10" on the 12th line. ``In the above embodiment, the hot water supply pipe and the hot water outlet pipe are arranged concentrically, but the present invention is not limited to this configuration, and the hot water supply pipe and the hot water outlet pipe may be separated and placed in the hot water storage tank. Needless to say, this is a good thing.The protruding mixing chamber mentioned above can be provided as needed, and the upper part of the hot water storage tank can also be used.

Claims (2)

[Claims] (1) A flow path with a circulation pump and a heat source is drawn out from the bottom of a hot water storage tank with a hot water outlet pipe at the top and a water supply pipe at the bottom. A hot water boiler connected to the body. (2) The hot water boiler according to claim 1, wherein the flow rate attenuator is disposed at an upper part of the hot water storage tank so as to spout high temperature hot water in a horizontal direction with respect to the hot water storage tank.