JPS618547A - Complex hot water supplier - Google Patents

Abstract

PURPOSE:To make a uniform upper and lower temperature range in a bath tub and keep a comfortable feeling during taking bath and a high efficiency of additional heating by a method wherein the outlet port of one of heat exchangers is divided by a distribution part and the mixture of air and hot water is injected and supplied into the bath tub through a venturi and an air pipe by way of the other heat exchanger acting as a bypass circuit. CONSTITUTION:When a setting unit 34 is set to an additional heating mode, a heat exchanger B is heated at a combustion part 32 to make an additional heating of water in a bath tub 20 under a circulation action. Simultaneously, a driving valve 35 is opened and a feeding of small amount of water is started at a flow rate restricting part 25 within the heat exchanger 17, injected toward a venturi part 40 at an extremity opening end 39 of a fine hot water feeding pipe 23, the air (a) is sucked under an ejection effect from an air pipe 43 at the negative pressure part 44 so as to form the mixture of air and hot water and then the hot water at the additional heating is mixed to make air bubble mixed condition. As a result, the mixture may flow into the bath tub without decreasing a characteristic of circulation, a uniform upper and lower temperature range can efficiently be accomplished and then a comfortable feeling and a convenient use of the unit can be assured under an effect of bubbles. The heat exchanger 17 has a larger thermal conducting area than that of the heat exchanger 18, resulting in that a waste heat caused by a thermal conduction and radiation thermal conduction from the combustion part 32 is recovered.

Description

[Detailed description of the invention] Industrial application field The present invention uses gas, oil, electricity, etc. as a heat source, and achieves uniformity and comfort of the hot water temperature in the bathtub during reheating, and high efficiency of heat exchange. This relates to a composite water heater.

Conventional Structure and its Problems Conventionally, this type of composite water heater system has been structured as shown in FIG.

A forced water flow type heat exchanger 2 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 3 (hereinafter referred to as heat exchanger B) are provided in the appliance body 1, and the heat exchanger 2 is heated through the circulation pipe 4 of the heat exchanger B3. , connected to the bathtub 5. The hot water outlet of the heat exchanger A2 is branched outside the appliance and is led to a hot water tap 6 and a hot water tap B7 (configured to face the bathtub 6).

The hot water tap B7 is opened and closed manually. A temperature detector 8 is also provided at the outlet of the heat exchanger A2. Fuel enters at the bottom part 9
A combustion section A10. which is supplied from the heat exchanger A2 and a combustion section A10. which is provided corresponding to the heat exchanger B3. Heat generation operation is performed in the combustion section Bll.

In addition, the fuel supply system includes a fuel controller A12 and a fuel controller B.
It consists of 13. 14 is a remote control, and 15 is a control section. The remote control 14 can also be installed remotely.

When additional heating is performed using this configuration, the process is as follows. Heat exchanger B3 has a heating effect due to natural circulation, so heat transfer is to heat exchanger A2.
It is technically difficult to increase the heat exchange efficiency by itself. Therefore, in order to improve this performance, the solution was to newly install a secondary heat exchanger. However, with this method, a natural circulation configuration is not possible in combination water heaters and bathtubs where the size of the heat source is regulated and the dimensions for installation with the bathtub 5 are regulated, and the problem remains. Ta. Furthermore, since reheating uses natural circulation, there is a large temperature difference between the top and bottom inside the bathtub, which poses problems in terms of usability.

Furthermore, the thermal influence on the heat exchanger A2 during heating of the heat exchanger B3 has become large due to the recent miniaturization, and the problem of after-boiling has also occurred.

Purpose of the Invention The present invention is intended to eliminate such conventional drawbacks, and to improve uniformity in the bathtub, improve comfort during bathing, and increase efficiency during reheating while maintaining natural circulation performance. Bypassing the hot water pipes and using the air ejector effect of the venturi section to effectively utilize the heat exchange action of the forced water heat exchanger, it is economical and does not burden the hot water supply load even when used simultaneously. The purpose is to realize high performance reheating.

Structure of the Invention In order to achieve this object, the present invention divides the outlet section of one forced water flow type heat exchanger (hereinafter referred to as heat exchanger A) by a distribution section within the device main body, and divides it into a bypass circuit. Through another natural circulation heat exchanger (hereinafter referred to as heat exchanger B), a mixture of air and hot water is sprayed into the bathtub by a venturi section and an air pipe, and the bypass circuit includes a driven valve, A flow rate regulating section is configured, and a water flow detector is provided at the inlet of the forced water flow type heat exchanger, and the drive valve is opened when heat exchanger B is heated, and in that case, the flow rate regulating section controls the flow rate of the bypass circuit. The control unit controls the flow rate to be less than the flow rate detected by the water flow detector.

With this configuration, when heating of the heat exchanger B starts, a natural circulation heating effect occurs and at the same time, the drive valve is opened by the control section.

As a result, the heat exchanger A is placed in a water flow state by the flow rate regulating part, and the effect of heat conduction and radiation transfer caused by heating is to exchange heat while preventing the state of after-boiling. Gain the effect of recovering losses and increase energy savings.

At this time, the water flow action works at an appropriate temperature due to heat recovery, promoting the reheating effect and providing a short bath time.

In addition, suitable temperature water is ejected from the venturi section, and air is sucked through the air pipe in the negative pressure section by the ejector effect, and the mixture is circulated in the bathtub while involving high-temperature water from natural circulation heating, which cools the bathtub. The interior of the bathtub can be efficiently uniformed without causing any damage, and the bubble effect creates comfort and improves ease of use.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3. In FIG. 2, a forced water flow type heat exchanger 17 (heat exchanger A) is provided in the device main body 16, and a water flow detector 27 is installed on the inlet side.
After configuring the temperature sensor 21 at the outlet part, the hot water supply circuit is divided by the distribution part 22, one part is connected to the hot water tap 24 outside the appliance, and the other part is connected to the thin hot water pipe 23 via the driven valve 35 and the vacuum break valve. 38, the tip opening 39 is formed so as to face the entrance side of the venturi section 40 provided in the water pipe 19 of the natural circulation heat exchanger 18 via the flow rate regulating section 25. The air pipe 43 is connected vertically to the negative pressure section 44 of the venturi section 40.
j:, 9 high configuration. Further, the outlet side of the venturi section 40 is configured to be tilted toward the bathtub 20. This thin hot water pipe 2
The three circuits are collectively referred to as a bypass circuit. heat exchanger A17,
The heat exchanger B18 is provided with a combustion section A31 and a combustion section B32, respectively. An exhaust chamber 37 is provided downstream of the heat exchanger A17 and heat exchanger B18, and the exhaust heat is exhausted by the blower 36.
It is configured to discharge from 2. The fuel supplied through the fuel supply port 41 is controlled according to the load by a fuel controller A29 and a fuel controller B30, and generates heat in the combustion portion AB31, 32. 28 is a water supply port, 33 is a control unit, and 34 is a setting device that can be remotely installed.

Specifically, the combustion part B32 is started by manual start of the setting device 34, and is activated by transmitting a signal (Sl) to the fuel controller B30 by the control part 33, and the combustion part A31 is started by the manual start of the setting device 34.
When the valve is opened, the movement of water in the heat exchanger A17 is detected by the water flow detector 2.
7 detects the signal (S2) and transmits the signal (S2) to the control unit 33, which is then transmitted as a command signal (S3) to the fuel controller A29, which operates the fuel controller A29.
The fuel controller A constantly determines the hot water supply load by transmitting the information to the fuel controller A.
29 is proportionally controlled to a desired set temperature. When the heat exchanger B18 is heated, the drive valve 3 in the bypass circuit
5 is open, the hot water in the heat exchanger A17 (due to heat conduction and radiation transfer from the combustion part B32) is controlled to a small amount by the flow rate regulating part 25 via the vacuum breaker valve 38 (the water flow rate is controlled by the water flow rate). Below the detection capability of the detector, usually 0 to 1,2 L/m i
n range).

When the reheating mode is set using the setting device 34 in the above configuration, the heat exchanger B is heated in the combustion section 32 and reheats the water in the bathtub 20 by natural circulation. At the same time, the drive valve 35 opens, and the heat exchanger A
17, a small amount of water is started to flow through the flow regulating part 25, and it is ejected from the tip port 39 of the Tsumugi Yukanko 3 towards the siventuri part 40, and the air is pumped through the air pipe 43 of the negative pressure part 44 by the siezector effect. It performs a suction action to form a mixture with air, and the high-temperature hot water that is reheated is drawn in to create a bubble-mixed state.

As a result, the water flows into the bathtub without reducing circulation performance, effectively achieving temperature uniformity between the top and bottom, and improving comfort, safety, and ease of use due to the bubble effect. . Normally, the heat exchanger A17 has a larger capacity than the heat exchanger B18, and the heat transfer area is large, allowing heat conduction from the combustion part B32,
It has the effect of recovering waste heat through radiation transfer, realizing high performance reheating and also achieving energy saving effects.

Furthermore, the heat exchanger A17 always works to pass water during reheating, thereby obtaining the effect of reducing after-boiling. As a result, heat exchanger A1
7 and heat exchanger B1B-gravity specific gravity combined installation is possible, further increasing the compactness of the combined water heater.

Even if the hot water tap 24 is opened and hot water supply starts during reheating, the amount of water flowing is small and does not affect the hot water supply characteristics in any way.

Effects of the Invention As described above, according to the combined water heater of the present invention, (1) High efficiency during reheating is achieved by the bypass circuit and the recovery of waste heat from heat exchanger B by heat exchanger A, resulting in energy saving effects. It also makes it possible to take a bath for a short time, improving usability.

? ) Even if hot water is used during reheating or immediately after, the thermal effect on heat exchanger A will be reduced to heat exchanger B by the bypass circuit.
Since the water is discharged into the water, it is possible to supply hot water without after-boiling, thereby improving safety and ease of use.

■) Furthermore, since after-boiling is effectively prevented during additional heating, it is possible to integrate the heat exchanger in a combined water heater, increase the density, and reduce the space inside the appliance body. In addition, the size and compactness will be further improved, and the degree of freedom in installation will also be improved.

2) By spouting the appropriately warm water obtained by recovering heat from the tip opening into the venturi part, a bubble effect is created and it flows into the bathtub, making it possible to equalize the temperature above and below without creating a cooling effect. This results in improvements in terms of comfort and ease of use.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional combined water heater, Fig. 2 is a block diagram of a combined water heater according to an embodiment of the present invention, and shows the reheating operation.
The figure is a sectional view of a thin hot water pipe and a water pipe section in one embodiment of the present invention. 16...Appliance body, 17...Forced water flow type heat exchanger, 18...Natural circulation type heat exchanger, 19
...Water pipe line, 21 ...Temperature detector, 2
2... Distribution section, 23... Thin hot water pipe (bypass circuit), 24... Hot water tap, 25...
・Flow rate regulation section, 27...Water flow detector, 31...
... Combustion part A, 32 ... Combustion part B, 33.
...Control unit, 35...Drive valve, 39...
...Tip opening, 40...Venturi part, 43
...Air pipe, 44...Negative pressure section. Figure 1 Figure 2

Claims (1)

[Claims] The device body is equipped with a forced water flow type heat exchanger and another natural circulation type heat exchanger, a combustion section is provided corresponding to each of the heat exchangers, and a water flow detection device is provided on the inlet side of the forced water flow type heat exchanger. At the same time, a temperature sensor is installed on the output side of the heat exchanger, and the output side end is divided, one end is led out of the equipment, and the other end is connected to the water pipe of the natural circulation type heat exchanger via a bypass circuit having a drive valve and a flow rate regulating part. It is configured to project into the water pipe and have its tip facing a venturi section formed in the water pipe, and an air pipe is provided in the negative pressure section of the venturi section to turn on/off the combustion section of the natural circulation heat exchanger. Correspondingly, the composite water heater includes a control unit that opens and closes the drive valve and controls the amount of water ejected from the bypass circuit to a level below the detection capability of the water flow detector in the flow rate regulation unit.