JP2634751B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a gas-liquid contact portion for bringing water or hot water into contact with the exhaust of a hot water supply burner in the middle of a route for supplying water or hot water to a portion to be supplied. On the downstream side of the gas-liquid contact portion, when water or hot water is accumulated, the water-sealing plate receives the water from the water supply side so as to seal a portion of the route from the gas-liquid contact portion to the supply target portion. On the water side
The present invention relates to a hot water supply device provided with a water pool portion divided into two .

[0002]

2. Description of the Related Art Conventionally, in this type of hot water supply apparatus, a path portion from a gas-liquid contact portion to a water pool portion is configured such that exhaust gas of a hot water supply burner can flow from the gas-liquid contact portion to the water pool portion. It had been.

FIG. 5 shows an example of a gas-liquid contact portion G and a water pool portion F in a conventional hot water supply apparatus. The gas-liquid contact portion G includes a plurality of ejection nozzles 16 for ejecting water supplied from the water supply passage W3 and a filling layer 17 in which stainless wires are braided in a three-dimensional lattice in a metal casing. An exhaust duct 12 of a hot water supply burner is connected below the packed bed 17, and an exhaust port 18 is provided at an upper portion of the casing, so that high-temperature exhaust gas from the hot water supply burner is introduced into the casing, and the exhaust port is provided. As it rises toward 18, it passes through the packed bed 17 and heats the packed bed 17 to a high temperature, and contacts the water jetted from the jet nozzle 16 to dissolve carbon dioxide in the exhaust gas and recover the exhaust heat. Is configured to perform the heat exchange. Therefore, if the hot water that has passed through the gas-liquid contact portion G is supplied to, for example, a bathtub, a carbonated bath can be obtained.

A water outlet 19 is provided at a position higher than the bottom of the casing at a lower portion of the casing, and when water is discharged from the water outlet 19, water or hot water is stored at a lower portion of the casing. Further, when water or hot water is accumulated, a water sealing plate 20 is provided so as to isolate the water outlet 19 in the casing, so that the lower part of the casing is directly connected from the gas-liquid contact part G to the supply destination. In order to seal the route, water sealing plate is used to supply water and receive water.
It was configured as a divided pool F.

[0005]

However, according to the above prior art, the exhaust gas of the hot water supply burner can freely flow through the casing from the gas-liquid contact portion to the water pool portion. When the hot water supply device is operated in a state in which the supply of water or hot water is not performed, such as when a hot water supply operation is performed by a hot water supply path, heating and drying by exhaustion of a hot water supply burner, There was a problem that the water on the water receiving side of the water pool portion was violently evaporated and decreased, and the water-sealed state could not be maintained.

In order to maintain the water-sealed state, the level of the sealed water in the water pool is detected, and when the level of the sealed water falls below a predetermined water level, water or hot water is supplied to the above-mentioned path and the water is collected. In the hot water supply device that is controlled so that the refilling of water is performed in the section, the control operation for refilling the water is performed extremely frequently and the control operation becomes complicated, and the hot water supply by the other hot water supply path is performed. There has been a disadvantage that the operation is hindered and inconvenience is given to those who use the hot water supply device.

An object of the present invention is to eliminate the above-mentioned conventional disadvantages.

[0008]

According to a first characteristic configuration of the hot water supply apparatus according to the present invention, the exhaust of the hot water supply burner is provided at a path portion from the gas-liquid contact section to the water pool section in the path . Do not directly touch the water surface on the receiving side.
In that a shielding means for preventing the above is provided.

A second characteristic configuration of the hot water supply apparatus according to the present invention specifies a preferred specific configuration when implementing the first characteristic configuration, and the gas-liquid contact portion and the water pool portion are separately provided. And a path portion from the gas-liquid contact portion to the water pool portion in the path is constituted by a communication pipe.

[0010]

According to the first feature of the present invention, the exhaust gas of the hot water supply burner comes into direct contact with the water surface on the water receiving side of the water pool.
Since the shielding means for preventing the water from being supplied is provided, it is possible to prevent the water on the water receiving side of the water pool from being evaporated by heating and drying by the exhaustion of the hot water supply burner.

According to the second characteristic configuration, the gas-liquid contact portion and the water reservoir are formed separately, and the path portion from the gas-liquid contact portion to the water reservoir in the path is formed by the communication pipe. With the above configuration, the shielding means can be configured, and further, the water pool can be prevented from being heated by heat conduction from the gas-liquid contact portion heated by the exhaust of the hot water supply burner.

[0012]

According to the first characteristic configuration of the present invention, since the sealed water can be prevented from being evaporated by heating and drying by the exhaust of the hot water supply burner, the sealed water is reduced and the sealed state is obtained. Can not be maintained, the control operation for replenishing the sealed water is performed remarkably frequently, and the control operation becomes complicated, and the hot water supply operation by other hot water supply paths is obstructed, and the inconvenience to the user of the hot water supply device is caused. It is possible to provide a hot water supply device that eliminates the disadvantages given.

According to the second characteristic configuration, it is possible to prevent the water pool from being heated due to heat conduction from the gas-liquid contact portion, so that it is possible to provide a hot water supply device in which a reduction in sealed water is further prevented. it can.

[0014]

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 section 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. , Hot water supply A
It is configured to relay a route for supplying hot and cold water to the bathtub B from.

In this embodiment , the water supply side is provided by a water sealing plate 20 below the gas-liquid contact portion G in order to seal the path.
A water pool F divided into a water receiving side is formed. 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 hot water supply apparatus, first, hot water boiled by the hot water supply burner 2 by the hot water supply burner 2 through the hot water supply path W1, the hot water supply heat exchanger 1, the hot water supply path W2, the water pool F, and the hot water supply path W4. A route for supplying hot water is provided, which is supplied as appropriate.

The water supply passage W1 is provided with a thermistor S1 for detecting a water supply temperature Ti in the water supply passage W1 and a water amount sensor S2 for detecting a water supply amount Q from the water supply passage 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.
As a result, 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 heated by the high-temperature exhaust gas is supplied to the bathtub B.
A route is provided in which carbon dioxide hot water is supplied as appropriate.

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 flow 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. Accordingly, 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.

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. The water level sensor S6 is provided at a height at which 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.

The exhaust duct 12 in the casing
Is located downstream of the position where
The upstream portion than, that, from the gas-liquid contact portion G in the route for performing the carbonate hot water supply in the path portion leading to the puddle portion F, the exhaust of hot water burner 2 is puddle portion F
A heat shield plate 22 is provided as shielding means for preventing direct contact with the water surface on the water receiving side . The heat shield plate 22 is formed of a metal plate fixed to the inner surface side of the casing, guides exhaust gas introduced from the exhaust duct 12 toward the filling layer 17, and collects water jetted from the jet nozzle 16 in a pool. The portion F is configured to collect water.

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.

The carbonated water supply mode is set to 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 FIGS. 3 and 4 show another embodiment of the hot water supply apparatus according to the present invention. In this alternative embodiment, the gas-liquid contact portion G and the water pool portion F are formed separately, and a path portion from the gas-liquid contact portion G to the water pool portion F in the path for supplying carbonic water is provided by the connecting pipe 23. It is configured. Therefore, the gas-liquid contact part G, the water pool part F, and the communication pipe 23 constitute the shielding means.

The lower portion of the gas-liquid contact portion G is configured to collect water jetted from the jet nozzle 16 and to guide the water to the connecting pipe 23. Exhaust duct 12 below gas-liquid contact part G
An overflow 24 connected to the water pool F is provided at a position lower than the position where is connected and higher than the overflow 21 of the water pool F. The hot water supply path W for supplying the hot water from the hot water supply heat exchanger 1
2 is connected to the water pool F.

A water outlet 19 and a water sealing plate 20 are provided in the water pool F, and a connecting pipe 23 is connected to the water outlet 19. or,
A water level sensor S8 and a water level sensor S9 for detecting the level of the sealed water, and a drain passage W for discharging the sealed water are provided in the water pool F.
7 and a discharge valve 25 are provided. The water level sensor S8 is provided at a height at which the water outlet 19 is provided. The water level sensor S9 is provided near the bottom of the water pool F. Water level sensor S8, water level sensor S9,
The discharge valve 25 is also connected to the control unit H.

In this alternative embodiment, hot water supply control means 10
1 terminates the hot water supply and the carbonated water supply, and executes the following control. The hot water supply or the carbonated water supply is completed, the intermittent valve 13 and the intermittent valve 14 are closed, and as the hot water supply burner 2 is digested, the discharge valve 25 is opened to discharge the sealed water. It is confirmed that both the water level sensor S8 and the water level sensor S9 do not detect the water sealing as the water is discharged, and that there is no detection abnormality of the water level sensor S8 and the water level sensor S9. When there is no detection abnormality in the water level sensor S8 and the water level sensor S9,
The discharge valve 25 is closed, the intermittent valve 13 is opened, water is injected again using the hot water supply path W2, and the intermittent valve 13 is closed as the predetermined water level is detected by the water level sensor S8 to end the water injection. .

[Other Embodiments] The part to be supplied is not limited to the bathtub B.

In the above embodiment, the gas-liquid contact portion G
Is configured so that tap water supplied from the water supply channel W1 by the water supply channel W3 is jetted from the jet nozzle 16, but hot water supplied from the hot water supply heat exchanger 1 by the hot water channel W2 is jetted from the jet nozzle 16. It may be configured to squirt.

In the claims, reference numerals are provided 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 and a water pool portion;

FIG. 3 is a configuration diagram showing the overall configuration of a hot water supply apparatus according to another embodiment.

FIG. 4 is a cross-sectional view showing a gas-liquid contact portion and a water pool portion of another embodiment.

FIG. 5 is a sectional view showing a gas-liquid contact portion and a water pool portion of a conventional hot water supply device.

[Explanation of symbols]

B Supply part F Water pool part (shielding means) G Gas-liquid contact part (shielding means) 2 Hot water supply burner 20 Water sealing plate 22 Shielding means 23 Communication pipe (Shielding means)

Claims (2)

(57) [Claims] 1. A gas-liquid contact portion (G) for bringing water or hot water into contact with 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 path portion from the gas-liquid contact portion (G) to the supply target portion (B) in the path when water or hot water is accumulated downstream of the gas-liquid contact section (G) in the path is water-sealed.
To separate the water supply side and the water reception side with the water sealing plate (20).
Puddles unit are (F) A water heater is provided, the path portion extending the gas-liquid contact portion in the path from (G) to said puddle portion (F), the exhaust of the hot water supply burner (2) contact but direct the water surface of the water receiving side of the front Symbol puddle unit (F)
Shielding means for preventing that (22), (G, F , 2
A hot water supply device provided with 3). 2. The path portion from the gas-liquid contact portion (G) to the water reservoir portion (F) in the path, wherein the gas-liquid contact portion (G) and the water reservoir portion (F) are formed separately. The hot water supply device according to claim 1, wherein the water supply device comprises a communication pipe (23).