JP3291095B2 - Hot water production and supply equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water producing and supplying apparatus for producing hot water by mixing steam and cold water and supplying the produced hot water.

[0002]

2. Description of the Related Art There are two types of hot water production and supply apparatuses of this kind, namely, a so-called pre-stop system and a circulation system.
First, an example of the first stop method is shown in FIG. In this figure,
The tank 1 is provided with a water supply pipe 3 whose inflow is controlled by a floating valve 2 for keeping the water level constant. The hot water in the tank 1 is supplied to the mixer 6 through a cold water supply path 50 provided with a pump device 4. This hot water production and supply device detects the temperature of hot water at the outlet side of the mixer 6 with a temperature sensor 7 and, based on the detection signal, through a controller 8 and a steam pipe 10 with a regulating valve 9 to control the flow rate of the steam. Control. Downstream of the mixer 6, a user pipe 12 is connected.

[0003] The hot water H is supplied to the user by the user pipe 12, but in such a preemptive system, when the use of the hot water H on the user side U is stopped, the load on the pump device 4 increases.

Next, an example of a conventional circulation system is shown in FIG. In this circulation system, the hot water in the tank 1 is supplied to the circulation path 5A.
Circulation. That is, the hot water H heated by the mixer 6 is pumped to the user side U by the user pipe 5a, and unused hot water is collected in the tank 1 by the collection pipe 14. The recovery pipe 14 is inserted into the tank 1, and therefore, even if the use is stopped at the user side U, there is no possibility that the load on the pump device 4 increases.

However, in this conventional circulation system, since the user pipe 5a is constituted by a part of the circulation path 5A, the entire pipe of the circulation path 5A becomes long. Therefore, user piping 5
In a, since the heat energy of the hot water H is lost, it is inevitable that the heat loss increases.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a hot water production and supply device which does not cause an excessive load on a pump device and has a small heat loss. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention first provides a tank to which cold water is supplied, a pump device that sucks and discharges water in the tank, and a pump device. A hot water production device having a circulation path for collecting water in the tank, and a mixer disposed in the circulation path and for raising the temperature of the water by blowing steam in a bubble state into the taken water. . Downstream of the mixer in the circulation path, there is provided a branched user pipe for taking out the heated water from the circulation path and supplying it to a user.

[0008]

According to the present invention, the circulation path is provided to collect and circulate the water sent from the pump device to the mixer in the tank. Therefore, even when the use is stopped on the user side, the hot water is supplied. Since the fluid flows in the circulation path, there is no possibility that the load on the pump device becomes excessive. In addition, since the user pipe to the user side is provided to be branched from the circulation path, the circulation path is significantly shorter than the conventional circulation system in which the user pipe forms a part of the circulation path, so that heat loss is reduced. Becomes smaller.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a tank 1 is provided with a water supply pipe 3 whose inflow is controlled by a floating valve 2 for keeping a water level constant. The hot water in the tank 1 is circulated by a circulation path 5 having a pump device 4. A mixer 6 is provided in the circulation path 5. The hot water producing apparatus detects the temperature of hot water at the outlet side of the mixer 6 with a temperature sensor 7 and, based on the detection signal, sends a steam pipe 10 with an adjustment valve 9 via a controller 8.
Controls the flow rate of steam.

[0010] The cold water C flowing into the tank 1 from the water supply pipe 3 through the floating valve 2 is sucked from the water supply pipe 11 by the pump device 4 and is pressure-fed into the mixer 6. At this time, if the temperature detected by the temperature sensor 7 has not reached the desired set temperature, a signal is sent from the controller 8 to the regulating valve 9, and the steam in the steam pipe 10 is supplied to the mixer via the regulating valve 9. 6 and attempts to return the hot water to the set temperature. A recovery pipe 14 is connected to the downstream side of the mixer 6 via a discharge pipe 13.
4 has been inserted into the tank 1. The tank 1, the pump device 4, the circulation path 5, the mixer 6, and the like constitute a hot water producing apparatus A according to the present invention. Downstream of the mixer 6 in the circulation path 5 of the hot water producing apparatus A, a user pipe 12 for a user is provided in a branched manner, whereby hot water H is supplied to the user side U.

FIG. 2 shows an example of the mixer 6. In this figure, a mixing chamber 60 is formed inside a mixer 6, and water is supplied from a water supply pipe 51 provided on a side wall. In the center of the mixing chamber 60, a steam blow-out pipe 62 having a number of small holes 61 for steam blow-out is inserted. The flow rate of the steam is controlled by the regulating valve 9 provided in the steam pipe 10 in FIG.

A pressure sensor 38 is provided near the water supply pipe 51 in the mixer 6 shown in FIG. The pressure sensor 38 detects the pressure in the circulation path 5 and sends the signal to a controller (not shown). This controller keeps the pressure in the circulation path 5 constant by changing the rotation speed of the pump device 4 in FIG. 1 in order to keep the detected pressure constant.

On the user side U, when the user consumes the hot water H, the water level in the tank 1 drops, and a corresponding amount of the cold water C is supplied from the water supply pipe 3. Due to this replenishment, the temperature of the water in the tank 1 and the water supply pipe 51 is reduced. At this time, a detection signal of the temperature sensor 7 is transmitted to the controller 8, and the regulating valve 9 is returned to restore the inside of the system of the manufacturing apparatus A to a predetermined temperature. Is sent to the mixer 6 from the steam pipe 10 to prevent a decrease in the temperature of the water supplied to the user side U.

In the hot water production and supply apparatus having the above-described structure, the water fed from the pump device 4 to the mixer 6 is recovered and circulated in the tank 1 by the circulation path 5. Therefore, even if the use of the hot water H is stopped on the user side U, the load of the pump device 4 does not become excessive because the hot water H flows through the circulation path 5.

The hot water producing apparatus A forms a circulation path 5. That is, the user pipe 12 does not constitute a part of the circulation path 5. Therefore, as compared with the conventional circulation type shown in FIG. 4, the circulation path 5 shown in FIG. 1 has a significantly reduced pipe length, so that heat loss is reduced.

[0016]

As described above, according to the present invention, the user pipe for supplying hot water to the user is provided by branching off from the circulation path of the hot water producing apparatus, so that the user stops using hot water. In this case, there is no possibility that the load of the pump device becomes excessive, and the circulation path is shortened, so that the heat loss is reduced.

[Brief description of the drawings]

FIG. 1 is a system diagram of a hot water production and supply device showing one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating an example of a mixer.

FIG. 3 is a system diagram of a conventional hot water production and supply device of a pre-stop method.

FIG. 4 is a system diagram of a conventional hot water production and supply device of a circulation system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tank, 4 ... Pump apparatus, 5 ... Circulation path, 6 ... Mixer, 12 ... User piping, A ... Hot water production apparatus, C ... Cold water,
H: warm water.

Continuation of the front page (56) References JP-A-2-213643 (JP, A) JP-A-61-104142 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1 / 10 F24D 17/00

Claims (1)

(57) [Claims] 1. A tank to which cold water is supplied, a pump device for sucking and discharging water in the tank, a circulation path for collecting water from the pump apparatus into the tank, and a circulation path arranged in the circulation path. A hot water production apparatus having a mixer that raises the temperature of the water by blowing steam in a bubble state into the taken water, and a user pipe that takes out the heated water from the circulation path and supplies the water to a user. Is provided downstream of the mixer in the circulation path.