JP3129848B2 - Hot water supply control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hot water supply burner in which an exhaust passage is formed so as to pass through a gas-water contact portion. As the amount of combustion of the hot water supply burner increases, the number of revolutions or driving power of a fan for the hot water supply burner increases. A blower control means for largely controlling is provided, and switching is performed to switch between a carbonated hot water supply state in which water or hot water is supplied by passing through the air / water contact section and a general hot water supply state in which hot water is supplied without passing through the air / water contact section. The present invention relates to a hot water supply control device provided with means.

[0002]

2. Description of the Related Art When water or hot water supplied to a bathtub is passed through an air / water contact portion, carbon dioxide in the exhaust gas of the burner is dissolved in the water or hot water supplied to the bathtub. That is, by switching whether or not to pass through the air / water contact portion, it is possible to switch between the carbonated hot water supply state and the general hot water supply state. By the way, conventionally, the ventilation control means is configured to control the rotation speed or the driving power for the same value of the combustion amount to the same value in the carbonated hot water supply state and the general hot water supply state.

[0003]

In the carbonated hot water supply state, water or hot water supplied to the bathtub passes through the air / water contact portion, so that the exhaust resistance of the exhaust path of the hot water supply burner becomes larger than that in the general hot water supply state. Conceivable. Therefore, when the rotation speed or the driving power for the same value of the combustion amount is controlled to the same value in both the carbonated water supply state and the general hot water supply state as in the above-described related art, the blown amount in the carbonated water supply state becomes the combustion amount. May be smaller than the blowing amount in the general hot water supply state for the same value. As a result, there is a possibility that the combustion characteristics in the state of hot carbonated water supply deteriorate. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional drawbacks and prevent the deterioration of combustion characteristics in a carbonated hot water supply state due to an increase in exhaust resistance of an exhaust passage.

[0004]

In order to achieve this object, a characteristic configuration of a hot water supply control device according to the present invention is characterized in that the blower control means converts the rotation speed or the driving power for the same value of the combustion amount to the carbonated hot water supply. In the state, it is configured to perform control more than in the general hot water supply state.

[0005]

When the rotation speed or the driving power is increased, the amount of air blow increases. On the other hand, as the exhaust resistance of the exhaust path increases, the amount of air blow decreases. Therefore, in the carbonated hot water supply state, the rotation speed or the driving power for the same value of the combustion amount is controlled to be larger than that in the general hot water supply state, thereby preventing a decrease in the blowing amount due to an increase in the exhaust resistance of the exhaust path.

[0006]

According to the present invention, it is possible to prevent a decrease in the amount of air blown in the carbonic acid hot water supply state due to an increase in the exhaust resistance of the exhaust passage.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a bathtub 2, a hot water supply unit A for supplying hot water to the bathtub 2, a reheating unit B for heating the bathtub water,
A control unit C, a remote controller R for giving commands to the control unit C, the air / water contact chamber 1, and a general hot water tap 20;
Are provided. The air / water contact unit 1 relays the supply of hot water from the hot water supply unit A to the bathtub 2. The hot water supply unit A includes a hot water supply heat exchanger 3 and a hot water supply burner 4, and the additional heating unit B includes an additional heating heat exchanger 5 and an additional heating burner 6.

Water supply channel W for supplying water to hot water supply heat exchanger 3
1 and a bath water supply passage W2 for supplying hot water from the outlet side of the heat exchanger 3 for hot water supply to the air / water contact portion 1. A general hot water supply path W3 for supplying hot water from the bathtub hot water supply path W2 to the general hot water tap 20 is branched and connected. A circulation path W4 for circulating bath water is provided between the bath 2 and the additional heat exchanger 5. In the water supply passage W1, a water amount sensor S1 for detecting the amount of water supplied to the bathtub 2 and the hot water supply heat exchanger 3 and a water temperature thermistor S2 for detecting the supply water temperature are provided.
A hot water temperature thermistor S3 for detecting a hot water temperature of the hot water supply heat exchanger 3 and a solenoid valve 7 for switching between a supply state and a non-supply state of water to the air / water contact chamber 1 are provided in the general hot water supply path W3.
Has a water flow switch S for detecting the opening of the general hot water tap 20.
4 is provided with a circulation pump 9 and a bathtub water temperature Tx in the circulation path W4.
And a water level sensor S6 for detecting a bath water level are provided respectively. Both burners 4,6
Are provided with gas valves 41 and 61 for interrupting the gas supply, gas proportional valves 42 and 62 for adjusting the gas supply amount, and fans 43 and 63 for blowing the combustion air.

The steam-water contact portion 1 will be described. A spray nozzle 12 for spraying hot water into a metal casing 11,
The filling layer 13 is mounted. Spray nozzle 12 is connected to bathtub hot water supply passage W2. The filling layer 13 is formed by braiding a stainless wire into a three-dimensional lattice. An exhaust supply port 14 communicating with the exhaust passage H of the hot water supply unit A is formed on the side of the packed layer 13. The high-temperature exhaust gas supplied from the exhaust supply port 14 is discharged from the upper exhaust discharge port 15 after heating the filling layer 13. In other words, the sprayed hot water drops come into contact with the exhaust gas whose heat has been deprived in the packed layer 13, dissolve the carbon dioxide gas in the exhaust gas, and deprive the packed layer 13 of the heat.

The remote controller R includes an operation switch 20, a hot water switch 21, a hot water temperature setting switch 22 for setting a target temperature Ts of bath water, a water level setting switch 23 for setting a target water level of the bathtub 2, and a general hot water supply. Each of the general temperature setting switches 24 for setting the target temperature Ts is provided.

The control unit C includes a water amount sensor S1, a water temperature thermistor S2, a tap water temperature thermistor S3, and a water flow switch S.
4. Each of the bathtub temperature thermistor S5, the water level sensor S6, and the remote controller R is connected. Then, the control unit C controls the operations of the solenoid valve 7, the gas valves 41 and 61, the gas proportional valves 42 and 62, and the fans 43 and 63 based on the information set and stored in advance and various input information. As the combustion amount Gp of the hot water supply burner 4 increases, the number of revolutions Ns of the fan 43 with respect to the hot water supply burner 4 is controlled to be large, and hot water passes through the air / water contact portion 1 to supply hot water to the bathtub 2. The state is switched to a general hot water supply state in which hot water is supplied to the general hot water tap 20 without passing through the contact portion 1. That is, the control unit C
Is used to form the air blowing control means 101 and the switching means 102.

The control of the rotation speed Ns of the fan 43 will be described. The relationship between the fan speed Ns and the combustion amount Gp of the hot water supply burner 4 is shown in FIG. FIG. 4A shows the case of the general hot water supply state (A mode), and FIG. 4B shows the case of the carbonated hot water supply state (B mode). In the figure, G1 is the minimum combustion amount, G
2 is the maximum combustion amount, N1 is the rotation speed for the minimum combustion amount G1 in the general hot water supply state, N2 is the rotation speed for the maximum combustion amount G2 in the general hot water supply state, and α and β are positive constants. That is, the rotation speed Ns for the same value of the combustion amount Gp is set larger in the carbonated hot water supply state than in the general hot water supply state.
The amount of combustion Gp is determined by the amount of water supplied to the hot water supply heat exchanger 3 and
It is determined based on the supply water temperature, the target temperature Ts, and the like. After the combustion amount Gp is obtained, in the general hot water supply state, FIG.
In (a), in the carbonic-hot water supply state, the rotation speed Ns of the fan 43 is obtained from the relationship shown in FIG.

Switching between the general hot water supply state and the carbonated hot water supply state will be described. When the hot water switch 21 is turned on, a carbonated hot water supply state is set. When the general hot water tap 20 is opened and the water flow switch S4 is turned on, a general hot water supply state is set. However,
The general hot water supply state has priority. That is, in the carbonated hot water supply state, when the general hot water tap 20 is opened, an interrupt signal is generated and the carbonated hot water supply state is temporarily stopped to enter the general hot water supply state. Then, when the general hot water tap 20 is closed, the hot water supply state is restored.

Next, based on the flowchart shown in FIG. 2, the control unit C in hot water supply to the bathtub 2 (carbonated hot water supply state).
Will be described. When the hot water switch 21 is turned on while the operation switch 20 is turned on, first, it is determined whether or not the bathtub water level has reached the set water level. When the bathtub water level has not reached the set water level, the controller C is given a hot water supply command to the bathtub 2. The case where the bathtub water level has reached the set water level will be described later. When a hot water supply command is given, first, the electromagnetic valve 7 is opened. At this time, the combustion amount Gp is obtained based on the water supply amount, the water supply temperature, the target temperature Ts set by the hot water temperature setting switch 22, and the like. Then, the target rotation speed Ns of the fan 43 is obtained from the relationship shown in FIG. The output is controlled so as to be the calculated combustion amount Gp and target rotation speed Ns (B mode). When the bathtub water level reaches the set water level, hot water supply to bathtub 2 is stopped. After stopping the hot water supply and when the bathtub water level has reached the set water level, the circulating pump 9 is operated to check whether the bathtub water temperature Tx exceeds the target temperature Ts. If not, additional heating is performed until the bathtub water temperature Tx reaches the target temperature Ts. If it does, do nothing. The above operation is executed until the hot water switch 21 is turned off.

Next, the operation of the control unit C in hot water supply to the general hot water tap 20 (general hot water supply state) will be described with reference to the flowchart shown in FIG. When the general hot water tap 20 is opened and the water flow switch S4 is turned on, an interruption process is executed. First, the status such as the state of the carbonated hot water supply state is stored in the memory. In the case of the carbonated hot water supply state, the electromagnetic valve 7 is closed and the hot water supply to the bathtub 2 is temporarily stopped. Next, the amount of water supply,
The combustion amount Gp is determined based on the feedwater temperature, the target temperature Ts set by the general temperature setting switch 24, and the like. Then, the target rotation speed Ns of the fan 43 is obtained from the relationship shown in FIG. The determined combustion amount Gp and target rotation speed N
The output is controlled to be s (A mode). The above operation is continued until the general hot water tap 20 is closed. When the interrupt processing is completed, the stored status is read.

[Alternative Embodiment] In the above embodiment, the blower control means 101 controls the number of revolutions of the fan 43. However, the drive power may be controlled. In the above embodiment, the hot water was supplied to the bathtub 2 in the carbonated hot water supply state, and the hot water was supplied to the general hot water tap 20 in the general hot water supply state.
As shown in FIG. 5, in hot water supply to the bathtub 2, when hot water passes through the air / water contact section 1 to supply hot water in a carbonated hot water supply state, and when hot water is supplied without passing through the air / water contact section 1. However, it may be in a general hot water supply state. In the drawing, W5 is a bypass for bypassing the air / water contact portion 1 to supply hot water to the bathtub 2, and 30 is a connection for connecting the outlet side of the heat exchanger 3 for hot water supply to the hot water supply passage W2 for bathtub or a bypass W.
5 is a switching valve for connecting or switching with the switching valve 5. In the above embodiment, the hot water is brought into contact with the exhaust of the hot water supply burner 4 of the hot water supply unit A, but may be brought into contact with the water or the exhaust of the additional heating burner 6 of the additional heating unit B. .

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a block diagram of the overall configuration.

FIG. 2 is a flowchart of a control operation;

FIG. 3 is a flowchart of a control operation.

FIG. 4 is a diagram showing a relationship between a combustion amount and a rotation speed in an A mode.

FIG. 5 is a block diagram of the overall configuration of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air-water contact part 4 Hot-water supply burner 43 Fan 101 Ventilation control means 102 Switching means H Exhaust path Gp Combustion amount Ns Revolution

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24H 1/00 602

Claims (1)

(57) [Claims] An exhaust path (H) of a hot water supply burner (4) is formed so as to pass through the air / water contact portion (1), and the larger the combustion amount (Gp) of the hot water supply burner (4), the more the hot water supply burner. A blower control means (101) for controlling the rotation speed (Ns) of the fan (43) or the driving power for (4) is provided, and water or hot water is supplied through the air / water contact portion (1). Switching means (1) for switching between a carbonated hot water supply state and a general hot water supply state in which hot water is supplied without passing through the air / water contact portion (1).
02) is provided, wherein said blower control means (101) adjusts said rotation speed (Ns) or drive power for said same combustion amount (Gp) to said general value in said carbonated hot water supply state. A hot water supply control device configured to perform control larger than a hot water supply state.