JPS6011054A - Composite hot-water supplying machine - Google Patents

Abstract

PURPOSE:To improve accuracy as well as response property, prevent malfunction due to scale or the like and permit to select the setting of water level in a bathtub arbitrarily by detecting the water level in the bathtub directly as a means to automate the hot-water supply of the composite hot-water supplying machine. CONSTITUTION:A forced water flowing type heat exchanger 22 and the natural circulation type heat exchanger 21 are provided in the main frame 25 of equipments and the bathtub 34 is connected through the water pipeline 35 of the heat exchanger 21. The water supplying pipe 28 of the heat exchanger 21 is formed vertically in the main frame 25 and a filter section 31 is attached to a connecting part between the water supplying pipe 28 and the water pipeline 35 while a float 30, to which magnet is coated by resin, is provided at the inner wall section 28a of the water supplying pipe 28 and the outer wall of the water supplying pipe 28 is constituted so that a magnet detecting detector 29 can be attached thereto at any place within the range of H in the direction of the height thereof. The detector is a means to detect the magnetic force of the magnet built-in type float, therefore, the accuracy of detecting the water level is high. The mounting position of the detector can be set arbitrarily, therefore, the water level of the bathtabe may be set freely.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite water heater that automatically supplies hot water using gas, oil, electricity, or the like as a heat source.

Conventional configuration and its problems Conventional detection systems for automatic hot water supply of this type are shown in Figures 1 and 2.
It is configured as shown in the figure.

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 heat exchanger B is passed through a circulation vibrator 4. In addition to being connected to the bathtub 9, the hot water outlet 12 of the heat exchanger A is branched within the appliance body 1, and one of the hot water outlets 12a faces a water pouring pipe 6 provided in the heat exchanger B. A drive valve 7 for regulating the amount of hot water is provided in the circuit of the hot water outlet 12a.

A water pressure detector 8 is attached to the lower part of the water cooling wall 13 of the heat exchanger B via a water connection pipe 18. The water pressure detector 8 has a diaphragm valve 14. Equal pressure spring 16. Interlocking rod 16. When the microswitch 17 is assembled, an output signal is sent to the control section 10. 11.11a is the heating section of heat exchangers A and B.

Reference numeral 19 denotes a hot water stop valve provided outside the appliance main body 1.

Here, a case in which molten metal is poured from heat exchanger A to heat exchanger B will be described as an example. The hot water supplied from the heat exchanger A is poured into the heat exchanger B from the water pouring tube 5 through the hot water outlet 12a under the action of the drive valve 7.
It is stored in the bathtub 9. As time elapses, the water level in the bathtub 9 becomes high.P1 The diaphragm type water pressure detector 8 installed in the heat exchanger B operates and a signal is transmitted to the control unit 1o, which closes the drive valve A and stops the heating unit 11. . At this time, the water pressure detector 8 detects as follows: When the operating zero water level rises, the amount of pressure received by the diaphragm valve 14 is large, and the balance with the equalizing pressure valve (hole 16) is lost, causing the interlocking rod 16 to be driven. The switch 17 is activated.Since this detection method detects the water level as pressure, the detection accuracy and responsiveness of the water level are poor, and currently it can be said that checking the presence or absence of water in the bathtub 9 is the only way. In addition, since the diaphragm 14 is always exposed to hot water, heat hardening occurs, which makes it easy to tear and has many durability problems.For automatic hot water supply, the user can arbitrarily select the set water level from nine types of bathtubs. In many cases, the water level that can be detected by the diaphragm valve 14 and the pressure equalization spring 16 is fixed to a constant value with the detection means, so it is impossible to arbitrarily set the water level, which is a problem. Since the sensor is fixed at the bottom of the sensor, if hot water scale or the like settles, it may cause false detection errors.

Purpose of the Invention The present invention is intended to eliminate such conventional drawbacks, and is a means for automatic hot water heating in a combined water heater, by directly detecting the water level in the bathtub, improving accuracy and responsiveness, and improving the hot water level. Preventing malfunctions due to etc.

It is also intended to allow the user to arbitrarily select the water level setting in the bathtub.

Structure of the Invention In order to achieve this object, the present invention provides a float having a water supply pipe formed in one of the water pipes of a natural or forced circulation heat exchanger (hereinafter referred to as heat exchanger B), and having a magnet coated inside with resin or the like. A detector for detecting magnetic force can be mounted at any position on the outer wall of the water supply pipe, and a filter section is provided near the connection between the water supply pipe and the water pipe line.

With this configuration, the hot water poured into the heat exchanger B from the water supply pipes is stored in the bathtub via the water pipes while constantly cleaning the float. The float also floats into the water supply pipe at the same level as the water level in the bathtub.

When the floating float reaches the height level of the detector outside the water supply pipe, the magnetic force of the float acts on the detector and stops the pouring operation.

At this time, the float is always at the same position as the water level in the bathtub, so water level detection is extremely accurate, and the configuration allows the detector to be installed at any position on the water supply pipe, making it easy to set the water level. Easy to select. Also, since the water injection operation and detection operation can be performed within the same water supply pipe, it is also superior in terms of cost.

In addition, since the float and the water supply pipe are constantly cleaned by the injected hot water, the detector does not malfunction, and the filter section removes foreign matter, etc., making it even more reliable.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In FIG. 3, there is a forced water flow type heat exchanger 22 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 2 in the appliance body 26.
1 (hereinafter referred to as heat exchanger B), and water pipe line 35 of heat exchanger B is installed.
is connected to the bathtub 34 via the hot water outlet 23 of the heat exchanger A.
is branched within the appliance main body 26, and one outlet 23a faces a water supply pipe 28 provided in the heat exchanger B. Other outlet 2
4 is a configuration in which a water stop portion 24 is provided outside the device main body 26.

The circuit of the hot water outlet 24a is provided with one drive unit and two drives for regulating the amount of hot water. The water supply pipe 28 of the heat exchanger B is formed vertically within the main body 26 of the apparatus, and a float 30 coated with a magnet and resin is installed inside the water supply pipe 28 so that the water supply pipe 28 is connected to the water supply pipe 28. The container 29 is configured so that it can be attached arbitrarily between the height directions H. The mounting method is fixed with screws or fixed bands. The output signal of the detector 29 is transmitted to the control unit 33.020.32
26 is a heat exchanger, B is a heating section, 26 is an exhaust unit 35 is a separate supply port, and 36 is a gear rally for air supply. FIG. 6 shows an example in which a pump 37 is provided inside the heat exchanger B on the side where the molten metal is poured.

When pouring from heat exchanger A to heat exchanger B, the @ of heat exchanger A is
The control unit 33 controls the fuel supplied from the fuel supply port 36 according to the pouring amount and set temperature.

- It is obtained by burning and generating heat in the heating section 20 after cooling. In this case, the 26 exhaust units also operate simultaneously to guide combustion air from the air supply gear gallery 36.

The hot water obtained by the heat exchanger A is transferred to the drive section 27. Hot water outlet 23a
The hot water is poured from the water supply pipe 28 into the heat exchanger B and stored in the bathtub 34. The inner wall 28a of the water supply pipe 28 and the float 30 are always cleaned with fresh hot water. As time passes, the water level in the bathtub 34 rises, and at the same time, the water level in the water supply pipe 28 also rises, causing the float 30 to float above the water surface. The floating position of float 3o and detector 2
When the mounting positions of the floats 9 and 9 match, the detector 29 detects the magnetic force of the float 30 and transmits the output to the control unit 33 and drives the drive unit 27.
is closed and the supply of fuel to the heating section 20 is stopped.

In this case, the water level in the bathtub 34 is at a position of 3° of the float, and the detector 29 can be mounted at a certain position to ensure high accuracy in detecting the water level.

Furthermore, since the mounting position of the detector 29 can be adjusted to any height H, the water level can be set arbitrarily for 340 types of bathtubs, and dimensional troubles during installation work between the appliance body 26 and the bathtub 34 can be avoided. be. Due to the cleaning effect of the float 3o and the inner wall portion 28a during pouring and the foreign matter removal action of the filter portion 31, no malfunction of the detector 29 occurs. In terms of structure, there is an advantage that the water supply pipe 28 and the detection section (pipe) can be used in common, and it is also advantageous in terms of cost.

Even during the heating action of the heat exchanger B, the presence or absence of hot water in the bathtub 34 can be reliably detected by the detector 29, so that the occurrence of dry heating is less likely to occur and there are sufficient safety benefits.

The embodiment shown in FIG. 5 has similar functions and effects.

Effects of the Invention Since the method detects the magnetic force of a float with a built-in magnet, the accuracy of water level detection is high.

By being able to set the detector mounting position arbitrarily, the water level for automatic water filling of the bathtub can be freely set, increasing the commercial value of the combined water heater.

Since the output generation side of the detection part is constantly cleaned during pouring, troubles such as false detection can be completely prevented and reliability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional combined water heater, Fig. 2 is a block diagram of a conventional detection means, Fig. 3 is a block diagram of a combined water heater which is an embodiment of the present invention, and Fig. 4 is a block diagram of the same detection means. . FIG. 6, a sectional view of the pouring part, is a configuration diagram showing another embodiment of the present invention. 20.32... Heating section, 21... Natural circulation heat exchanger, 22... Forced water flow heat exchanger, 27... Drive section , 28... Water supply pipe,
28a...Inner wall part, 29...Detector,
30... Float, 33... Control section, 36
・・・・・・Water pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person) c
'J 3rd part 4th Figure 31 3rd part

Claims (1)

[Claims] (1) The appliance body is equipped with a forced water flow type heat exchanger and another natural or forced circulation type heat exchanger, the water is injected into the water pipe of the forced heat exchanger, and the other natural or forced circulation type heat exchanger is A water supply pipe as a water receiving means is formed in the water pipe line of the type heat exchanger, means for mounting a magnetic force detector at an arbitrary position is provided on the outside of the water supply pipe, and a float for generating magnetic force is provided in the water supply pipe. , a composite water heater configured as a control device for controlling the heating amount and water injection amount of the forced water circulation type heat exchanger, and a water level detection device in the other natural or forced circulation type heat exchanger.