JPH0791736A - Carbonated water heater - Google Patents

Abstract

(57) [Summary] [Purpose] To supply a carbonated water heater that can supply carbonated hot water having a high carbonic acid concentration at a low cost and has a short filling time. [Structure] A hot water supply heat exchanger 4 for heating water supplied under pressure from a water supply source 3 and a hot water supply burner 5 for heating the hot water supply heat exchanger 4 are provided, and water from the water supply source 3 or A gas-liquid contact portion D for contacting the hot water heated by the hot-water supply heat exchanger 4 and the exhaust gas of the hot water supply burner 5 is provided, and the carbonated hot water from the gas-liquid contact portion D is supplied by the pump 10 to the supplied portion. In the carbonated water heating apparatus provided with the carbonated hot water supply passage W4 for supplying pressure to H, the hot water supply passage W6 for supplying the hot water heated by the hot water supply heat exchanger 4 to the supply target portion H by the water supply pressure from the water supply source 3. Is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a hot water supply heat exchanger for heating water supplied under pressure from a water supply source, and a hot water supply burner for heating the hot water supply heat exchanger. Water or the hot water heated by the hot water supply heat exchanger and the exhaust gas of the hot water supply burner are provided with a gas-liquid contact part, and carbonated hot water from the gas-liquid contact part is supplied by a pump. The present invention relates to a carbonated water heating apparatus provided with a carbonated water heating channel for supplying pressure to the section.

[0002]

2. Description of the Related Art Such a carbonated water heating apparatus dissolves carbon dioxide gas (carbon dioxide) in the exhaust gas into water or hot water by bringing water or hot water into contact with the exhaust gas of a hot water supply burner at a gas-liquid contact portion. Water or hot water in which carbon dioxide gas is dissolved (hereinafter referred to as carbonated hot water) is supplied to the supply target portion. For example, when the supply target portion is a bath, a carbonated bath can be used.

Conventionally, as shown in FIG. 2, a gas-liquid contact portion D
In the above, the water from the water supply source 3 and the hot water heated in the hot water heat exchanger 4 are brought into contact with the exhaust gas of the hot water supply burner 5 to generate carbonated hot water, and the carbonated hot water is pumped by the pump 10. For example, the pressure is supplied to the bathtub 1 serving as the supply target portion H through the path W4.

Incidentally, W2 in FIG. 2 is a reheating circulation path for circulating the bath water of the bath 1. The pump 10 is installed in this circulation path W2, and the pump 10 in the circulation path W2
A carbonated hot water supply passage W4 is connected to a location upstream of the above. or,
An opening / closing valve V4 is provided at an upstream side of a connection point with the carbonated hot water supply passage W4 in the circulation passage W2, and an opening / closing valve V4 is provided at the carbonated hot water supply passage W4.
5 are installed respectively. Therefore, when the carbonated hot water is supplied to the bathtub 1, the opening / closing valve V4 is closed, the opening / closing valve V5 is opened, and the pump 10 is operated.

In FIG. 2, W9 is a gas-liquid contact hot water supply passage for supplying the hot water heated by the hot water supply heat exchanger 4 to the gas-liquid contact portion D, and W10 is a water supply source 3 A gas-liquid contact water supply channel for supplying water to the gas-liquid contact portion D, 7 is a reheating heat exchanger, and 8 is a reheating burner for heating the reheating heat exchanger 7.

[0006]

Therefore, in the above-described conventional carbonated water heater, the supply amount of water or hot water per unit time (hereinafter, referred to as unit supply amount) to the supplied portion is determined by the capacity of the pump. Therefore, if the unit supply amount is increased and the time required to supply a desired amount of water or hot water to the supply target portion (hereinafter, referred to as the filling time) is shortened,
It is necessary to use a high capacity pump, but in that case,
There is a problem that the cost is increased because a large capacity pump is used.

Further, when a small capacity pump is used, an increase in cost due to the use of a large capacity pump can be prevented, but there are the following problems. In other words, since the unit supply amount is small, it is necessary to reduce the amount of hot water supplied from the heat exchanger for hot water supply, which reduces the combustion amount of the burner for hot water supply and the amount of carbon dioxide gas in the exhaust gas of the burner for hot water supply. Therefore, there is a problem that the amount of carbon dioxide gas dissolved in water or hot water becomes small, and as a result, the carbonate concentration in the hot water becomes low. Also, as the unit supply amount decreases,
There is a problem that the filling time will be long.

The present invention has been made in view of the above circumstances, and an object thereof is to solve the above-mentioned conventional problems all at once, and to supply a carbonated hot water having a high carbonic acid concentration at a low cost. The purpose is to supply a carbonated water heater with short filling time.

[0009]

A first characteristic configuration of a carbonated water heating apparatus according to the present invention is to supply hot water heated by the hot water supply heat exchanger to the supplied portion by a water supply pressure from the water supply source. There is a hot water supply passage.

A second characteristic configuration is to provide a circulation path for reheating that circulates water or hot water in a bathtub as the supply target portion, the pump is interposed in the circulation path, and the carbonated hot water supply passage and The hot water supply passage is connected to a location upstream of the pump in the circulation passage, and a state in which water or hot water in the bathtub is circulated through the circulation passage in association with the operation of the pump, and carbonated hot water from the carbonated water supply passage. A state in which the hot water is supplied to the bathtub through a part of the circulation path according to the operation of the pump, and the hot water from the hot water supply path is supplied to the bathtub through a circulation path portion other than the flowing portion of the carbonated hot water in the circulation path. There is provided a flow state switching means for switching to and.

[0011]

According to the first characteristic configuration, the carbonated hot water is supplied from the gas-liquid contact portion to the supplied portion through the carbonated hot water supply passage by the pump, and at the same time, the hot water heat exchanger is passed through the hot water supply passage. The heated hot water is supplied to the supplied portion by the water supply pressure from the water supply source.

According to the second characteristic configuration, the carbonated hot water from the carbonated hot water supply passage is supplied by the pump to the bathtub through a part of the circulation passage by the pump by the flow state switching means. It is possible to switch to a state in which the hot water is supplied to the bathtub through the circulation path portion other than the flowing portion of the carbonated hot water in the circulation path by the water supply pressure from the water supply source.

[0013]

According to the first characteristic configuration, the carbonated hot water is heated by the pump in the hot water supply heat exchanger through the hot water supply passage in parallel with the supply of the carbonated hot water through the carbonated hot water supply passage by the pump. Since hot water is supplied to the supplied part by the water supply pressure from the water supply source, it is possible to increase the amount of hot water supplied through the hot water supply passage, so that a pump with a small capacity can be used, resulting in cost reduction. Can be reduced. Moreover, since the unit supply amount can be increased while using a pump having a small capacity, the filling time can be shortened. Also, as the amount of hot water supplied from the hot water heat exchanger increases, the combustion amount of the hot water supply burner also increases, and the amount of carbon dioxide gas in the exhaust gas of the hot water supply burner also increases. The amount is large, and as a result, the carbonate concentration in the carbonated hot water can be increased.

According to the second characteristic configuration, when the present invention is applied to the carbonated bath, a pump having a small capacity, which has been conventionally interposed in the circulation path for reheating, can be used.
The cost can be reduced, and carbonated hot water having a high carbonic acid concentration can be supplied, and the filling time can be shortened.

[0015]

Embodiments of the present invention will be described below with reference to FIG. First, the overall configuration of the carbonated water heater will be described. The carbonated water heater supplies hot water from the bathtub 1 as the supply target portion H, the hot water supply portion A that supplies hot and cold water to the bathtub 1, the reheating portion B that heats the hot and cold water of the bathtub 1, the gas-liquid contact portion D, and the hot water supply portion A. The general hot-water tap 2 to be supplied, a control unit C that controls various controls of the carbonated water heating apparatus, and a remote controller R that gives various commands to the control unit C are mainly configured.

The hot water supply unit A has a hot water supply heat exchanger 4 for heating water supplied under pressure from a water supply source 3 such as a water supply through a water supply passage W1, and a hot water supply burner 5 for heating the hot water supply heat exchanger 4. And a blower fan 6 for supplying combustion air to the hot water supply burner 5.

The reheating unit B is a reheating heat exchanger 7 provided in a reheating circulation path W2 for circulating the bath water of the bathtub 1, and a reheating unit for heating the reheating heat exchanger 7. The burner 8 and a blower fan 9 for supplying combustion air to the reburning burner 8 are provided. A pump 10 is provided in the circulation path W2.

The gas-liquid contact portion D will be further described. The spray nozzle 12 is arranged in the upper part of the casing 11, the filling layer 13 is arranged below the spray nozzle 12, and the storage part 14 is formed in the lower part of the casing 11. An exhaust passage 15 for guiding the exhaust of the hot water supply burner 5 is connected to the gas phase portion of the gas-liquid contact portion D, and an exhaust port 16 is formed on the side of the gas phase portion. A gas-liquid contact water supply passage W3 connected to the water supply passage W1 is connected to the spray nozzle 12. The packing layer 13 is
The stainless wire is braided into a three-dimensional lattice.

That is, the casing 1 passes through the exhaust passage 15.
The hot exhaust gas of the hot water supply burner 5 introduced into the exhaust gas outlet 1
In the process of flowing toward 6, the packed bed 13 is heated and brought into contact with the water sprayed from the spray nozzle 12 to dissolve carbon dioxide in the water and heat the water. The generated carbonated hot water is stored in the storage unit 14.

Then, the carbonated hot water in the reservoir 14 is pumped 10
A carbonated hot water supply passage W4 for supplying pressure to the bathtub 1 is connected to a position upstream of the pump 10 in the circulation passage W2.

A bathtub hot water supply passage W6 for supplying hot water heated in the hot water supply heat exchanger 4 to the bathtub 1 by the water supply pressure from the water supply source 3 is called a hot water supply passage W5 from the hot water supply heat exchanger 4. ,
The circulation path W2 is connected to a location upstream of the connection location with the carbonated hot water supply passage W4.

A general hot water supply passage W8 is connected to a mixing valve 17 connecting a mixing water supply passage W7 connected to the water supply passage W1 and a hot water discharge passage W5, and a general hot water tap 2 is connected to the general hot water supply passage W8. . That is, the mixing valve 17 is used to adjust the mixing ratio of the hot water from the hot water outlet W5 and the water from the mixing hot water supply passage W7 so that hot water having a desired temperature is discharged from the general hot water tap 2. is there.

A water supply temperature sensor S1 for detecting a water supply temperature Ti to the hot water supply heat exchanger 4 is connected to the water supply path W1 and a hot water supply path W5.
Is a hot water outlet temperature sensor S2 that detects the hot water outlet temperature To from the hot water supply heat exchanger 4, a circulation passage W2 is a bath water temperature sensor S3 that detects the bath water temperature Tb of the bathtub 1, and a general hot water supply passage W8 is Each hot water tap temperature sensor S4 for detecting the hot water outlet temperature Tc from the general hot water tap 2 is provided.

A water supply amount sensor F1 for detecting a water supply amount Qi to the hot water supply heat exchanger 4 is provided in the water supply passage W1 and a general hot water supply passage W8.
A hot water discharge amount sensor F2 for detecting the hot water discharge amount Qo from the general hot water tap 2 is provided.

A water supply opening / closing valve V is provided in the water supply passage W3 for gas-liquid contact.
1, hot-water supply opening / closing valve V2 is provided in bathtub hot-water supply path W6. Further, a three-way valve V3 is provided at a position upstream of the pump 10 in the circulation path W2.
A carbonated hot water supply passage W4 is connected to. The three-way valve V3 is in a circulation state in which the outflow-side flow passage W2o on the upstream side of the three-way valve V3 in the circulation passage W2 and the inflow-side flow passage W2i on the downstream side are connected, and the carbonated hot water supply passage W4 and the inflow-side flow passage. The flow path is switched to the hot-water filling state in which the portion W2i is connected.

Further, a check valve 18 and a vacuum breaker 19 which allow only the flow to the circulation path W2 side are interposed in the hot water supply path W6 for the bathtub.

The storage portion 14 of the gas-liquid contact portion D has a storage portion 1
A lower limit water level sensor L1 and an upper limit water level sensor L2 for detecting the water level of the carbonated hot water stored in No. 4 are provided. Further, the bathtub 1 has a bathtub water level sensor L3 for detecting the water level of the bathtub water.
Is provided.

In the gas supply passage N1 for supplying the fuel gas to the hot water supply burner 5, a gas on-off valve G1 for connecting and disconnecting the fuel supply,
Further, a gas proportional valve G2 for adjusting the fuel supply amount is interposed, and a gas opening / closing valve G3 for connecting and disconnecting the fuel supply is provided in the gas supply passage N2 for supplying the fuel gas to the additional burner 8. A gas proportional valve G4 for adjusting the fuel supply amount is provided.

The remote controller R includes an operation switch 20, a hot water bath switch 21, an additional heating switch 22, and a hot water bath temperature setting switch 2 for setting a target temperature Ts _b of bath water.
3, generally hot water temperature setting switch 24 for setting a target temperature Ts _c general hot water, and is provided with a respective water level setting switch 25 for setting a target level of bath water.

The control section C is constructed by using a microcomputer and has temperature sensors S1, S2, S3, S.
4, flow rate sensors F1 and F2, and water level sensors L1 and L
2 and L3 are connected to each other so that the detection information of each sensor is input, and the blower fans 6 and 9, the pump 10, the mixing valve 17, the opening / closing valves V1 and V2, the three-way valve V3, and the gas opening / closing valve. G1, G3 and gas proportional valve G
Each of G2 and G4 is connected to control the operation of each.

The control operation of the controller C will be described below. First, the hot water filling control will be described. Run switch 2
When the hot water supply switch 21 is turned on while 0 is on, the water supply on-off valve V1 and the hot water supply on-off valve V2 are opened,
At the same time, the three-way valve V3 is switched to the flow path in the hot water filling state.
Therefore, since the water supply amount sensor F1 is turned on, the gas on-off valve G1 and the gas proportional valve G2 are opened after the blower fan 6 is operated based on this on information. Therefore, the hot water heated by the hot water supply burner 5 and heated by the hot water supply heat exchanger 4 is heated by the water supply pressure from the water supply source 3 to the hot water supply passage W6 for bathtub.
And is supplied to the bathtub 1 through the outflow side flow passage W2o of the circulation passage W2.

Further, when the water level of the carbonated hot water stored in the storage portion 14 of the gas-liquid contact portion D is equal to or higher than the installation location of the lower limit water level sensor L1 and the lower limit water level sensor L1 is turned on, based on the ON information, Operate the pump 10. Therefore, the carbonated hot water in the storage portion 14 is supplied to the bathtub 1 by the pump 10 through the carbonated hot water supply passage W4 and the inflow side flow passage portion W2i of the circulation passage W2. Further, when the lower limit water level sensor L1 is turned off, the pump 10 is stopped, and when the upper limit water level sensor L2 is turned on, the water supply opening / closing valve V1 is closed, and when the upper limit water level sensor L2 is turned off, the water supply opening / closing valve V1 is opened. . That is, the storage unit 1
4, the carbonated hot water in the reservoir 14 is supplied to the bath 1 while maintaining the water level of the carbonated hot water between the installation location of the lower limit water level sensor L1 and the installation location of the upper limit water level sensor L2.

When the water level detected by the bath water level sensor L3 reaches the target water level set by the water level setting switch 25, the pump 10 is stopped and the water supply on-off valve V1 and the hot water supply on-off valve V2 are closed. The three-way valve V3 is switched to the flow path in the circulation state. Therefore, since the water supply amount sensor F1 is turned off, the blower fan 6 is stopped after closing each of the gas on-off valve G1 and the gas proportional valve G2 based on this off information.

Next, the additional heating control will be described. When the reheating switch 22 is turned on while the operation switch 20 is on, the hot water supply on-off valve V2 is closed, and the pump 10 is operated with the three-way valve V3 switched to the circulation flow path. In addition to operating the blower fan 9, the gas on-off valve G3 and the gas proportional valve G4 are opened. Therefore, the bath water circulates through the circulation path W2 and is heated by the additional heat exchanger 7. Then, the detected temperature Tb of the bath water temperature sensor S3, YuCho been becomes the target temperature Ts _b set by the temperature setting switch 23, after closing the people gas on-off valve G3 and the gas proportional valve G4 husband, blower fan 9 And the pump 10 are stopped.

Therefore, the hot water supply on-off valve V2 and the three-way valve V3
Is the circulation path W in accordance with the operation of the pump 10
2 and the carbonated hot water from the carbonated hot water supply passage W4 is supplied to the bathtub 1 through the inflow side flow passage portion W2i of the circulation passage W2 with the operation of the pump 10, and the hot water from the bathtub hot water supply passage W6 is supplied. It functions as a flow state switching means E for switching to a state in which it is supplied to the bathtub 1 through the outflow side flow passage W2o of the circulation path W2.

Next, the temperature control of bath water at the time of filling water will be described. When hot water supply from the general hot water tap 2 is prohibited at the time of hot water filling, the input Ip to the hot water supply burner 5 is calculated by the following calculation formula, and the gas proportional valve G2 is adjusted to the calculated input Ip. Control the opening of. Ip = K ₁ (Ts _b −Ti) × Qi where K ₁ is a preset coefficient.

In addition, when hot water supply from the general hot water tap 2 is permitted during hot water filling, the input Ip to the hot water supply burner 5 is calculated by the following arithmetic expression so that the calculated input Ip is obtained. Then, the opening of the gas proportional valve G2 is controlled. Ip = K ₂ (Ts _b −Ti) × (Qi−Qo) + K
₃ (Ts _c −Ti) × Qo However, K ₂ and K ₃ are preset coefficients.

In the above-described hot water filling control, when the detected water level of the bath water level sensor L3 reaches the target water level set by the water level setting switch 25, the detected temperature Tb of the bath water temperature sensor S3 is changed to the target temperature Ts. _{If b} is not reached,
Following YuCho control running add-fired control described above, the detected temperature Tb of the temperature sensor of the bath water is set to be the target temperature Ts _b.

Next, general hot water supply control will be described. When the general hot water tap 2 is opened, the water supply amount sensor F1 is turned on. Therefore, based on this on information, the blower fan 6 is operated, and then the gas on-off valve G1 and the gas proportional valve G2 are opened. Further, the temperature Tc detected by the hot water tap temperature sensor S4 is
The mixing valve 17 is controlled so that the target temperature Ts _c set by the general hot water supply temperature setting switch 24 is reached. Therefore, the hot water whose temperature is adjusted to the target temperature Ts _c is
It is supplied to the general hot water supply tap 2 through the general hot water supply passage W8.

Another Embodiment Next, another embodiment will be described. In the above embodiment, the case where water is supplied from the water supply source 3 to the gas-liquid contact portion D has been described as an example, but instead of this, hot water heated by the hot water supply heat exchanger 4 may be supplied. or,
Both water and hot water heated by the hot water supply heat exchanger 4 may be supplied from the water supply source 3.

In the above embodiment, the flow state switching means E
Although the example has been described in which the hot water supply on-off valve V2 and the three-way valve V3 are used, the specific configuration of the flow state switching means E can be variously changed. For example, instead of the three-way valve V3, an opening / closing valve is provided at each of the carbonated hot water supply passage W4, and the circulation passage W2 between the connection portion with the carbonated hot water supply passage W4 and the connection portion with the bathtub hot water supply passage W6. May be.

The supply target portion H is not limited to the bathtub 1.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a carbonated water heater according to an embodiment of the present invention

FIG. 2 is an overall configuration diagram of a conventional carbonated water heater.

[Explanation of symbols]

 1 Bathtub 3 Water Supply Source 4 Heat Exchanger for Hot Water Supply 5 Burner for Hot Water Supply 10 Pump D Gas / Liquid Contact Part E Flow State Switching Means H Supply Target Part W2 Circulation Path W4 Carbonated Hot Water Supply Path W6 Hot Water Supply Path

Claims (2)

[Claims] 1. A hot water supply heat exchanger (4) for heating water pressurized and supplied from a water supply source (3), and a hot water supply burner (5) for heating the hot water supply heat exchanger (4). Water from the water source (3) or the heat exchanger for hot water supply (4) provided
A gas-liquid contact portion (D) for contacting the hot water heated in step (4) with the exhaust gas of the hot water supply burner (5) is provided, and the carbonated hot water from the gas-liquid contact portion (D) is pumped by the pump (10). A carbonated hot water supply device provided with a carbonated hot water supply passage (W4) for supplying pressure to a supply target portion (H), wherein the hot water heated by the hot water supply heat exchanger (4) is the water supply source (3). A carbonated water heating apparatus provided with a hot water supply passage (W6) for supplying water to the supply target portion (H) by the water supply pressure from. 2. A bathtub (1) as the supplied portion (H)
A circulation path (W2) for reheating the water or hot water is provided, the pump (10) is interposed in the circulation path (W2), and the carbonated hot water supply path (W4) and the hot water supply path (W6) are provided. )
Is connected to a location upstream of the pump (10) in the circulation path (W2), and circulates water or hot water in the bathtub (1) through the circulation path (W2) as the pump (10) operates. The state and the carbonated hot water from the carbonated hot water supply passage (W4) are supplied to the bathtub (1) through a part of the circulation passage (W2) according to the operation of the pump (10), and the hot water supply passage (W6). ) Hot water from the circuit (W2)
2. The carbonated water heating apparatus according to claim 1, further comprising a fluidized state switching means (E) for switching to a state of supplying to the bathtub (1) through a circulation path portion other than the fluidized portion of the carbonated hot water.