JP2634752B2 - Water heater - 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 supply device provided with a gas-liquid contact portion for bringing water or hot water into contact with exhaust gas from a hot water supply burner in the course of supplying water or hot water to a portion to be supplied. .

[0002]

2. Description of the Related Art Conventionally, as this type of hot water supply device , for example,
Open indicated water heater to actual Unexamined 1-102646 JP Invite
was there. That is, the device is used to convert bath water into a carbonated spring.
In order to heat the water, a circulation path was set up between the bathtub and the heating burner.
If a gas-liquid contact part that mixes exhaust gas generated by the burner is provided
In both cases, an air separator and a
With air vent valve to remove air in circulating water
have. Here, the gas-liquid contact portion is to contact the water or hot water supplied to the supplied portion with the exhaust of the hot water supply burner,
Carbon dioxide (carbon dioxide) contained in exhaust gas from hot water supply burners
Is dissolved in water or hot water. If the water or hot water that has passed through the gas-liquid contact portion is supplied as a supply destination to, for example, a bathtub, a carbonated bath can be obtained.

[0003]

However, according to the above prior art, a large amount of bubbles are mixed in water or hot water after gas-liquid contact at the gas-liquid contact portion. Among them, relatively large bubbles are naturally separated from water or hot water by their own buoyancy, and are discharged from an air separator and an exhaust path provided in the middle of the path, but relatively small bubbles are water or water. Because it is supplied to the part to be supplied as it is on the flow of hot water,
Exhaust gas from the hot water supply burner is supplied to the supply destination as air bubbles, which causes inconvenience or danger to the user of the hot water supply device. An object of the present invention is to eliminate the above-mentioned conventional disadvantages.

[0004]

A first feature of the water heater according to the present invention is that a hot water supply device is provided downstream of a gas-liquid contact portion of a path.
Separates air bubbles mixed in water or hot water supplied to the supply unit
Bubble separating means is provided.
However, the path area is smaller than other path parts of the path.
The separated bubble separation tube and the separated bubbles are discharged out of the path.
In that it is composed of an open-to-air chamber . The second characteristic configuration of the hot water supply device according to the present invention is a gas-liquid contact portion of the path.
On the downstream side, the water or hot water supplied to the
Bubble separating means for separating and are air bubbles have been kicked setting,
A turbulence generating section provided in the path;
And an open-to-atmosphere chamber for discharging separated air bubbles out of the path.
In that it is composed of

[0005]

According to the first feature configuration of the present invention, other route sections are provided.
Provide a bubble separation tube with a smaller path area than
By increasing the flow velocity of water etc. in the separation tube, small bubbles
Can be aggregated to grow into large bubbles. So
An air release chamber is provided downstream of the bubble separation tube,
Reduce the flow velocity of the water or hot water increased by the bubble separation tube again.
Bubbles are separated from water etc. by retaining water etc.
be able to. As in the second characteristic configuration of the present invention, the route
A turbulence generating section in
By promoting the condition, small bubbles are gathered and large
Can grow into bubbles. And the open air room
The air bubbles are separated from water etc.
Can be released.

[0006]

According to the first aspect of the present invention, a bubble is provided.
Make the cross section of the separation tube smaller than the cross section of the other
Although it has a simple structure with an open chamber,
Actively grow bubbles into large bubbles,
Alternatively, it can be easily separated from hot water. Also, water or
Actively separates and removes small air bubbles mixed in hot water.
As a result, the exhaust gas from the hot water supply burner
It is not supplied, and discomfort to the person using the water heater
To provide a hot water supply device that does not cause inconvenience such as giving
Can be. According to the second feature of the present invention, water or hot water
That a turbulence generator that promotes turbulence
Despite the simple structure, small bubbles can be turned into large bubbles.
Aggressive growth, easy to separate the bubbles from water or hot water
Can be done. And also in the case of this configuration, water or
Binding to actively separated and divided by a small air bubbles mixed in hot water
As a result, the exhaust gas from the hot water supply burner
It is not supplied, and discomfort to the person using the water heater
To provide a hot water supply device that does not cause inconvenience such as giving
Can be.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot water supply device for supplying water or hot water to a bathtub B as a supply destination. The hot water supply apparatus heats tap water supplied in the water supply passage W1 to supply hot water to the bathtub B and the hot water tap K, and a reheating unit C for reheating the bathtub water in the bathtub B, It is composed of a gas-liquid contact section G for bringing water or hot water into contact with the exhaust of the hot water supply burner 2 and a control section H for controlling the operation of the hot water supply apparatus.

The hot water supply section A is provided with a hot water supply heat exchanger 1 for supplying tap water through a water supply passage W1, a hot water supply burner 2 for heating the hot water supply heat exchanger 1, and a combustion air of the hot water supply burner 2. A blower fan 3 for blowing air is provided. The hot water supply burner 2 is provided with a fuel control valve 4 for adjusting the amount of fuel supplied to the hot water supply burner 2 and a fuel intermittent valve 5. or,
The rotation speed of the blower fan 3 is controlled to a value uniquely determined according to the fuel supply amount so that the blower amount is such that the combustion state of the hot water supply burner 2 is optimized.

The reheating unit C includes a reheating heat exchanger 6 provided in a circulation path W5 for circulating bath water in the bathtub B, a reheating burner 7 for heating the reheating heat exchanger 6, and a reheating burner 7. And a blower fan 8 for blowing the combustion air of the firing burner 7.
A circulation pump 9 is provided in the circulation path W5. The reburning burner 7 is provided with a fuel control valve 10 for adjusting a fuel supply amount to the reburning burner 7 and a fuel intermittent valve 11. The blower fan 8 is controlled in the same manner as the blower fan 3 according to the reburning burner 7.

An exhaust duct 12 of the hot water supply unit A is connected to the gas-liquid contact portion G so that the exhaust gas of the hot water supply burner 2 passes therethrough. A hot water supply path W2 leading to the contact section G, a water supply path W3 leading water from the water supply path W1 to the gas-liquid contact section G, and a hot water supply path W4 leading hot water from the gas-liquid contact section G to the bathtub B are connected. The hot water supply unit A is configured to relay a route for supplying hot water to the bathtub B.

In addition, a water reservoir F for water-sealing the path is formed below the gas-liquid contact part G in this embodiment. The hot water supply channel W2 and the hot water supply channel W3 are connected so as to be located on the upstream side of the water pool portion F in the above-mentioned route, and the water pool portion F is provided in the hot water channel W2 or a route portion from the hot water channel W2 to the hot water channel W4. It is configured to intervene.

In the middle of the hot water supply path W4, a bubble separation means D for separating bubbles mixed in water or hot water supplied to the supply target portion B downstream of the gas-liquid contact portion G of the path. Is provided.

In the hot water supply apparatus, first, the hot water is burned by the hot water supply burner 2 by the hot water supply path W1, the hot water supply heat exchanger 1, the hot water supply path W2, the water pool F, the hot water supply path W4, and the bubble separating means D. Hot water is supplied to the bathtub B appropriately, and a hot water supply route is formed.

The water supply channel W1 is provided with a thermistor S1 for detecting a water supply temperature Ti in the water supply channel W1 and a water amount sensor S2 for detecting a water supply amount Q from the water supply channel W1. The hot water supply path W2 is provided with an intermittent valve 13,
The supply of hot water from the hot water supply heat exchanger 1 to the bathtub B is controlled. In the hot water supply path W4, a thermistor S3 for detecting the actual hot water supply temperature Tx for the bathtub B is provided.

The hot water supply path W2 has a branching hot water supply path W6.
Is provided so that hot water boiled by the hot water supply burner 2 can be supplied to the hot water tap K as needed to perform general hot water supply. The hot water supply path W6 is provided with a water amount sensor S4 for detecting opening of the hot water tap K.

The hot water supply device includes a water supply channel W1, a water supply channel W3, a gas-liquid contact portion G, a water pool portion F, and a hot water supply channel W4.
And the bubble separating means D, the carbon dioxide contained in the exhaust gas of the hot water supply burner 2 is dissolved by passing through the gas-liquid contact portion G, and the hot water warmed by the high-temperature exhaust gas flows into the bathtub B. Thus, a path is formed in which carbon dioxide hot water supplied as appropriate is performed.

The water supply passage W3 is provided with an intermittent valve 14, so that the supply of carbon dioxide to the gas-liquid contact portion G is controlled. In addition, when the carbonated hot water supply is performed, the hot water supply is also performed simultaneously from the path in which the hot water supply is performed. It is configured to be supplied.

The control section H is composed mainly of a microcomputer, is connected to thermistors S1 and S3, and water quantity sensors S2 and S4. , 1
0, the fuel intermittent valves 5 and 11, the blower fans 3 and 8, the circulation pump 9, the intermittent valves 13 and 14, and the controller 15 are connected to form a hot water supply control means 101 for controlling various operations of the hot water supply device. Have been.

The controller 15 includes a hot water supply switch 15a, a carbonated water supply switch 15b, and a target hot water supply temperature T.
target hot water supply temperature setting switch 15c for setting s, and
An additional hot water supply switch 15d and the like are provided.

FIG. 2 shows a gas-liquid contact portion G in this embodiment.
It is shown. The gas-liquid contact portion G is provided in a metal casing with a plurality of ejection nozzles 16 for ejecting water supplied from the water supply passage W3, and a filling layer 17 formed by braiding stainless wires in a three-dimensional lattice. The exhaust duct 12 of the hot water supply unit A is connected below the filling layer 17, and an exhaust port 18 is provided at the upper part of the casing. Therefore, when the high-temperature exhaust gas from the hot-water supply burner 2 is introduced into the casing and the exhaust gas rises toward the exhaust port 18, the gas-liquid contact portion G passes through the filling layer 17 and heats the filling layer 17 to a high temperature. It is configured to heat and contact the water jetted from the jet nozzle 16 to dissolve the carbon dioxide in the exhaust gas into the water and to perform heat exchange by collecting exhaust heat.

A temperature sensor S5 for detecting the temperature of the gas-liquid contact portion G is provided near the filling layer 17 in the casing. The temperature sensor S5 is also connected to the control unit H.

At the lower part of the casing, the water pool F
Is provided. The water pool F is connected to the hot water supply path W4, is configured to collect water jetted from the jet nozzle 16 and hot water supplied from the hot water supply path W2, and is located at a position higher than the bottom of the casing. A water outlet 19 is provided to the hot water supply passage W4 so that when water is discharged from the water outlet 19, water or hot water accumulates at a lower portion of the casing, and when water or hot water accumulates, the water or hot water flows out of the casing. A water sealing plate 20 is provided so as to isolate the water port 19, and is configured to water seal a path portion from the gas-liquid contact portion G to the bathtub B in the path for supplying carbonic water.

As described above, the water spouted from the spouting nozzle 16 rushes down toward the water pool F while being in contact with the exhaust gas of the hot water burner 2, so that the water in the water pool F as shown in FIG. A large amount of air bubbles are mixed in due to exhaust.

The water sump F is provided with a water level sensor S6 and a water level sensor S7 for detecting the water level of the sealed water, and an overflow 21. Water level sensor S6
Is provided at the height where the water outlet 19 is provided. The water level sensor S7 is provided at a position slightly higher than the lower end of the water sealing plate 20. Note that the water level sensor S6 and the water level sensor S7 are also connected to the control unit H.

FIG. 3 shows a bubble separating tube 22 and an open-to-atmosphere chamber 23 as an example of the bubble separating means D. The bubble separation tube 22 is formed to have a smaller path area than other path portions of the path. Therefore, the bubble separation tube 2
The flow rate of the water or hot water passing through 2 becomes faster, and the effect that small bubbles grow into large bubbles occurs. Open air chamber 23
Is formed in a chamber shape for temporarily retaining water or hot water that has passed through the bubble separation tube 22, and is provided with a discharge tube 23a for collecting the separated bubbles and discharging the bubbles out of the path.

The hot water supply control means 101 is configured to execute the following four types of hot water supply modes. The first hot water supply mode is a hot water supply hot water supply mode in which only hot water from the hot water supply heat exchanger 1 is supplied to the bathtub B. The second hot water mode is
A carbon dioxide hot water supply mode in which the hot water from the hot water supply heat exchanger 1 and the hot water passed through the gas-liquid contact portion G are mixed and supplied to the bathtub B.
The third hot water supply mode is a general hot water supply mode in which hot water from the hot water supply heat exchanger 1 is supplied only to the hot water tap K. The fourth hot water supply mode is an additional heating water supply mode by the additional heating unit C.

In this embodiment, there is no hot water supply mode in which hot water is supplied to the bathtub B and hot water to the hot water tap K at the same time, and the hot water supply mode or the carbonated hot water supply mode is executed. When the hot water tap K is opened, the hot water supply mode or the carbonated hot water mode is stopped and the general hot water supply mode is executed.

In the hot water supply mode, the controller 15
Of the hot water supply switch 15a. When the hot water supply switch 15a is operated, the blower fan 3
Is driven, the intermittent valve 13 is opened, the hot water supply burner 2 is ignited, and the thermistors S1, S3 and the water amount sensor S
The fuel control valve 4 and the fuel intermittent valve 5 are set such that the hot water supply temperature Tx detected by the thermistor S3 approaches the target hot water supply temperature Ts set by the target hot water supply temperature setting switch 15c based on the detection result of Step 2. The rotation speed of the blower fan 3 is controlled accordingly.

In the carbonated water supply mode, the carbonic acid supply switch 15
It is executed by the operation of b. Carbonated water heater switch 15b
Is operated, first, the temperature of the gas-liquid contact portion G is checked by the temperature sensor S5, and when the gas-liquid contact portion G is overheated to a predetermined temperature or more, the blower fan 3 is driven to cool the gas-liquid contact portion G. Is performed. When water is suddenly ejected from the ejection nozzle 16 in a state where the gas-liquid contact portion G is overheated to a predetermined temperature or more, an abnormal noise such as a slash is generated, the water is violently evaporated, and a large amount of water is discharged from the exhaust port 18 and the like. This is because water vapor is discharged, which is not preferable for use of the hot water supply device. If the temperature of the gas-liquid contact portion G is equal to or lower than the predetermined temperature, the intermittent valves 13 and 14 are opened, the hot water supply burner 2 is ignited, and based on the detection results of the thermistors S1, S3 and the water amount sensor S2, the thermistor S3 The detected hot water supply temperature Tx is set to the target hot water supply temperature setting switch 15.
The fuel control valve 4 and the fuel intermittent valve 5 are controlled so as to approach the target hot water supply temperature Ts set at c, and the rotation speed of the blower fan 3 is controlled accordingly.

The general hot water supply mode is executed as hot water tap K is opened. When the hot water tap K is opened, the intermittent valve 13 and the intermittent valve 14 are closed, and the temperature of hot water supplied to the hot water tap K is set to a predetermined hot water temperature based on the detection results of the thermistor S1 and the water amount sensor S2. So that
The fuel control valve 4 and the fuel interrupting valve 5 are controlled, and the rotation speed of the blower fan 3 is controlled accordingly.

The additional hot water supply mode is set to the additional hot water supply switch 15.
It is executed with the operation of d. Additional heating hot water switch 15d
Is operated, the circulating pump 9 is operated, the blower fan 8 is driven, the reburning burner 7 is ignited, and reburning hot water is supplied. In addition, the combustion amount of the reburning burner 7 is controlled to a constant strength with relatively high thermal power.

The hot water supply control means 101 constantly monitors the level of the sealed water in the water pool F by the water level sensor S7, and detects that the level of the sealed water is lower than the predetermined level by the water level sensor S7. Then, the intermittent valve 1
3 is opened, and replenishment of the sealed water is performed using the hot water supply path W2. When the water level sensor S6 detects that the sealed water level is equal to or higher than the predetermined water level,
The intermittent valve 13 is closed, and the replenishment of the sealed water ends. still,
When the water level of the sealed water is lower than the predetermined water level, the combustion of the hot water supply burner 2 is not permitted.

[Another Embodiment] FIG. 4 shows a turbulence generating tube 24 as a turbulence generating portion provided in the above-mentioned path instead of the above-described bubble separating tube 22 as another embodiment of the bubble separating means D. Have been. The turbulent flow generating tube 24 is provided with a large number of turbulent flow generating plates 24a on the inner wall side of the tube. It is configured such that an action of growing into bubbles occurs. Bubbles grown by the turbulence generating tube 24 are removed from the open-to-atmosphere chamber 23 as in the above-described embodiment.

FIG. 5 shows another turbulence generating tube 25. The turbulence generating tube 25 is provided with a spring-like turbulent coil 25a inside the tube, and by promoting the turbulent state of water or hot water passing through the tube, small bubbles gather to grow into large bubbles. It is configured so that the following action occurs. Bubbles grown by the turbulence generating tube 25 are removed from the open-to-atmosphere chamber 23 as in the above-described embodiment.

[Other Alternative Embodiments] The bubble separating means D is not limited to the one in which small bubbles are grown into large bubbles by promoting a turbulent flow state. Bubbles may be collected in the direction of the center of the vortex and separated and removed outside the path.

The shape and structure of the open-to-atmosphere chamber 23 are not limited to those shown in FIG.

In the above embodiment, the bubble separating means D
Is provided in a path portion of the above-described path that is located downstream of the water pool section F, but may be provided in a path section of the above-described path that is located between the gas-liquid contact section G and the water pool section F. .

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing the overall configuration of a water heater.

FIG. 2 is a sectional view showing a gas-liquid contact portion.

FIG. 3 is a cross-sectional view showing a bubble separation unit.

FIG. 4 is a cross-sectional view showing a bubble separating unit according to another embodiment.

FIG. 5 is a cross-sectional view showing a bubble separating means of another embodiment.

[Explanation of symbols]

 B Supply target part D Bubble separation means G Gas-liquid contact part 2 Hot water supply burner 22 Bubble separation tube 23 Atmosphere open chamber 24 Turbulence generator 25 Turbulence generator

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-305119 (JP, A) JP-A-1-102646 (JP, U)

Claims (2)

(57) [Claims] A gas-liquid contact portion (G) for bringing water or hot water into contact with the exhaust of a hot water supply burner (2) is provided in the middle of a path for supplying water or hot water to the portion to be supplied (B). A hot water supply device, further comprising a bubble separating means (D) downstream of the gas-liquid contact portion (G) of the path for separating bubbles mixed in water or hot water supplied to the supplied portion (B). ) Is provided, and the air bubble separating means (D ) is provided at a position different from the other path portions of the path.
A bubble separation tube (22) having a narrow path area,
An open-to-air chamber (2) for discharging the separated air bubbles out of the path
3) A hot water supply device comprising: 2. A process for supplying water or hot water to a portion to be supplied (B).
In the middle of the road, connect water or hot water with the exhaust of the hot water supply burner (2).
A hot water supply device provided with a gas-liquid contact part (G) to be touched
And the downstream side of the gas-liquid contact portion (G) of the path,
Bubbles mixed in water or hot water supplied to the supply unit (B)
Is provided, and the bubble separation means (D) is provided with a turbulent flow provided in the path.
The generator (24, 25) and the separated air bubbles are moved out of the path.
Hot water consisting of an open-to-air chamber (23) for discharging air
apparatus.