JP3536736B2 - 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, and more particularly, to a hot water supply device having a hot water storage tank as a heat exchange medium tank in a combustion can body and passing a heat exchange section for hot water supply into the hot water storage tank. The present invention relates to a hot water supply apparatus for secondary indirect heating.

[0002]

2. Description of the Related Art In a conventional general instantaneous hot water supply apparatus, a heat exchange section such as a heat exchange coil disposed in an exposed state in an upper portion of a combustion chamber or the like directly receives combustion heat, thereby generating heat. Water passing through the exchange coil is instantaneously heated. On the other hand, there is also provided an instantaneous hot water supply device of a type in which a semi-hot water storage tank which is not so large is provided at an upper portion of the combustion chamber, and this is used as a heat exchange medium tank, in which a heat exchange section such as a heat exchange coil for hot water supply is arranged. Have been. In this type of instantaneous water heater, the semi-hot water tank is heated by combustion heat, and the water passing through a heat exchange coil arranged in the semi-hot water tank is
Hot water was supplied by indirect heating (liquid-liquid exchange) secondary by hot water in the semi-hot water storage tank.

[0003]

However, in the instant water heater of the type in which the hot water in the heat exchange coil is further instantaneously heated by the hot water in the hot water storage tank using the hot water storage tank.
Conventionally, since the temperature of the hot water storage tank must be maintained at a high temperature as a heat exchange medium, the burner is controlled to be on and off with the maximum combustion capacity,
Since the temperature of the hot water storage tank was maintained at a high constant temperature, there were the following problems. That is, since the maximum combustion is performed even when the required combustion capacity is extremely small, such as when supplying a small amount of hot water, and the maximum combustion is performed even when the hot water supply is not used, there is a problem that the combustion noise is loud every time and is annoying. In addition, since it often burns at a capacity higher than the required combustion capacity, the on-time in the on-off control is shortened, the combustion cycle is shortened, and as a result, the number of times of combustion increases, which is unpleasant and unpleasant. Had a problem.

Therefore, the present invention solves the above-mentioned disadvantages of the conventional hot water supply apparatus, and frequently turns on and off the burner.
Another object of the present invention is to provide a hot water supply device that can eliminate harshness and discomfort caused by a large combustion noise, and can easily maintain the temperature of a hot water storage tank in a predetermined high temperature range by efficient combustion.

[0005]

In order to achieve the above object, a water heater according to the present invention is used for on-off combustion of a petroleum burner.
Therefore, it has a combustion can body provided with a hot water storage tank to be heated, and by arranging a hot water supply heat exchange unit of the hot water supply circuit in the hot water storage tank, water passing through the hot water supply heat exchange unit is passed through the hot water storage tank. Warm water is supplied by indirect heating with secondary hot water
In addition to hot water supply operation, bath reheating operation using the hot water storage tank
And one or both of the heating operation and the hot water supply operation
Simultaneous operation is possible, and combustion of the combustion can body by the oil burner is performed when the temperature of the hot water storage tank reaches a predetermined upper limit temperature regardless of whether or not an actual hot water supply operation is performed. A hot water supply device that is stopped and restarts combustion when the temperature of the hot water tank falls below a predetermined lower limit temperature.
Therefore, the combustion of the combustion can body by the oil burner is performed in a hot water storage tank.
Once the heat retention heating is started, once the temperature of the hot water storage tank reaches the upper limit
To a preset target maintenance temperature between the temperature and the lower limit temperature
Combustion with high capacity until reaching the target
After reaching the maintenance temperature, the combustion capacity according to the temperature of the hot water tank
The first feature is that combustion is performed . Also, the hot water supply device of the present invention provides an on-off fuel
Having a combustion can body with a hot water tank heated by baking,
The heat exchange unit for hot water supply of the hot water supply circuit should be placed in the hot water storage tank.
In this way, the water passing through the heat exchange unit for hot water supply is transferred to the hot water in the hot water storage tank.
To supply hot water by secondary indirect heating
In addition to the hot water supply operation, the bath reheating operation using the hot water storage tank
One or both of the hot-water supply operation and the hot-water supply operation
With the oil in the combustion can
Combustion by the burner depends on the actual hot water supply operation.
Combustion when the temperature of the hot water tank reaches the predetermined upper limit temperature
Is stopped and the temperature of the hot water tank is
A water heater that restarts combustion when
Therefore, the combustion of the combustion can body by the oil burner is performed in a hot water storage tank.
Once the heat retention heating is started, once the temperature of the hot water storage tank reaches the upper limit
To a preset target maintenance temperature between the temperature and the lower limit temperature
Combustion with high capacity until reaching the target
The second feature is that the combustion is performed with a constant low capacity after the maintenance temperature is reached .

According to the first feature , hot water is stored in the combustion can body.
A bath is provided, and in addition to the hot water supply operation using the hot water storage tank, a bath
Supply one or both of reheating and heating operations
It can be operated simultaneously with hot water operation. And in the hot water tank
Is provided with a heat exchange unit for hot water supply in the hot water supply circuit,
Is secondarily indirectly passed through the hot water supply heat exchange section in the hot water tank.
It is heated and supplied with hot water. Heat exchanger for hot water supply
Hot water storage tanks can be stored in stone
The oil burner is heated by the combustion of the oil burner,
Combustion stops when the tank temperature reaches a predetermined upper limit temperature
When the temperature reaches a predetermined lower limit, combustion restarts
So that it is burned on and off.

[0007] Then, according to the first aspect, the main operation switch of the equipment is turned on to the hot water tank heating is started,
Once so until it reaches the target maintaining temperature combustion of oil burners with high capacity is carried out, the temperature by the temperature, the time being of the hot water storage tank between the upper limit temperature and the lower limit temperature of the hot water storage tank the target maintaining temperature It can be quickly adjusted to a state where heat exchange heating is possible. Therefore, preparations for actual hot water supply are quickly prepared, and it becomes possible to supply predetermined hot water from the beginning, thereby improving the usability of hot water supply. Of course, after the temperature of the hot water storage tank it has once reached the target maintaining temperature, stone
Since the combustion of the oil burner is performed with the combustion capacity according to the temperature of the hot water tank, the temperature can be maintained with less waste of fuel and less noise.

According to the second feature, the combustion of the oil burner is performed with a high capacity until the temperature of the hot water tank reaches the target maintenance temperature. Therefore, the target maintenance temperature is set to the upper limit temperature and the lower limit temperature of the hot water tank. with a temperature of between, for now can quickly adjust the temperature of the hot water storage tank into a state capable of heat exchange heating, thus quickly appointed actual preparation for hot water, from the beginning It becomes possible to quickly heat and heat predetermined hot water to supply hot water, thereby improving the usability of hot water supply. Further, once the temperature reaches the target maintenance temperature , the temperature of the hot water storage tank is controlled to be between the upper limit temperature and the lower limit temperature by performing on / off control with a constant low capacity combustion. By setting the degree of to an appropriate capacity by an experiment in advance, it becomes possible to maintain a predetermined temperature range with a small noise and a small combustion loss without frequently turning on and off.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic configuration diagram of a hot water supply apparatus according to an embodiment of the present invention, FIG. 2 is a flow chart of temperature control of hot water in a hot water storage tank of a combustion can body according to an embodiment of the present invention, and FIG. 3 is another embodiment of the present invention. It is a temperature control flowchart of the hot-water storage tank which concerns on a form.

Referring to FIG. 1, first, the entire hot water supply apparatus will be described. Reference numeral 10 denotes a combustion can body, which is provided with a hot water storage tank 12 called a so-called semi-hot water storage tank above a combustion chamber 11, and a blower 13 a and an oil spray nozzle 1 for the combustion chamber 11.
An oil burner 13 having 3b is provided to face. The hot water storage tank 12 functions as a heat exchange medium tank, and hot water in the hot water storage tank 12 is not used for hot water supply. A plurality of exhaust gas passages 14 are provided in the hot water storage tank 12 so as to penetrate in the vertical direction. The hot water tank 1
2 is provided with a hot water storage temperature sensor 12a.

A hot water supply circuit 20 is provided for the hot water storage tank 12.
Is provided. The hot water supply circuit 20 includes a water supply passage 21, a hot water supply heat exchange coil 22 as a heat exchange unit for hot water supply, a hot water supply passage 23 , a bypass passage 24 from the water supply passage 21 to the hot water supply passage 23, and a bypass between the hot water supply passage 23 and the hot water supply passage 23. Hot water mixing means 25 for mixing hot and cold water from the passage 24, a hot water supply path 26 for guiding hot water flowing out of the hot and cold water mixing means 25 to a hot water supply terminal 29 such as a hot water tap, and a branch from the hot water supply path 26. A hot water supply path 27 for exclusive use of a bathtub is provided. Heat exchange coil 22 for hot water supply
Is soaked in the hot water tank 12, and is wound many times at a position near the outer periphery in the hot water tank 12.
The incoming water channel 21 is provided with an incoming water temperature sensor 21a and an incoming water flow rate sensor 21b, the outgoing water passage 23 is provided with an outgoing water temperature sensor 23a, and the hot water supply passage 26 is provided with a hot water supply temperature sensor 26.
a is provided. Further, a total flow rate adjusting means 28 is provided in the hot water supply passage 26. This total flow control means 28
The total flow rate of the water flowing through the hot water supply passage 26 is controlled so that the outlet water temperature cannot reach the set hot water supply temperature even if the entire amount of the water flowing from the water inlet passage 21 is subjected to heat exchange heating. It is a flow control valve provided for regulation.

A circulation circuit 30 for reheating the bath is provided for the hot water storage tank 12. The bath reheating circuit 30 has a bath outward path 31, a bath reheating heat exchange coil 32, and a bath return path 33. The heat-exchanging coil 32 for bath heating is wound many times inside the hot water tank 12 of the combustion can body 10 at a position inside the case of the heat-exchange coil 22 for hot water supply. The water in the bathtub (not shown) is guided into the hot water storage tank 12 by the circulation pump 34 and heated. A bypass 36 is provided between the bath outward path 31 and the bath return path 33 via a three-way valve 35, and the bathtub-only hot water supply path 27 is provided in the bypass path 36, and an opening / closing valve 27 a,
The flow rate sensor 27b is connected via a check valve 27c. The bath return path 33 includes a bath temperature sensor 33a.
And a bath water flow switch 33b.

A heating circuit 40 is provided for the hot water storage tank 12.
Is configured. In the heating circuit 40, a heating high-temperature outgoing path 41 is directly connected to the top of the hot water tank 12, and a heating return path 43 is connected to the hot water tank 12 so that heating can be performed by directly using hot water in the hot water tank 12. It is directly connected to the lower part of the tank 12. A circulation pump 44 is provided in the heating return path 43, and a heating low-temperature forward path 42 is provided branching from the downstream part thereof. Bypass valve 45 from the top of hot water tank 12
The bypass path 46 is connected to the heating return path 43 via. A small water storage section 47 is provided in the middle of the heating return path 43 to which the bypass path 46 is connected. The water storage section 47 has a water level detection sensor 47a for detecting the water level of the water storage tank 12 of the combustion can body 10, and a heating pressure relief valve 47b. Is provided. 48
Is a reserve tank, which replenishes water through the water storage section 47 when the water level decreases, such as when the water level in the hot water tank 12 decreases.

Reference numeral 50 denotes a controller,
1. It is communicatively connected to the bath remote control 62 and the heating remote control 63, and controls each part of the apparatus.

The hot water supply operation will be described based on the above configuration. Now, in a state where the main switch of the hot water supply operation is turned on by the hot water supply remote controller 61, the oil burner 13 is burned as necessary even if hot water supply by the actual hot water supply operation is not performed, and the combustion can body The water in the hot water storage tanks 12 is heated, and is brought into a standby state where the heat exchange heating of the water passing through the hot water supply heat exchange coil 22 can be performed at any time. Then, when the hot water supply terminal 29 is opened and the actual hot water supply is started, the water from the water inlet 21 is heated by the hot water in the hot water storage tank 12 by passing through the heat exchange coil 22 for hot water supply, and The hot water is supplied to the hot water supply path 2 through the hot water mixing means 25.
6 and flows out of the hot water supply terminal 29. Controller 5
0 is the incoming water temperature detected by the incoming water temperature sensor 21a of the incoming water passage 21, the incoming water flow detected by the incoming water flow rate sensor 21b, and the outgoing water temperature detected by the outgoing water temperature sensor 23a of the outgoing water passage 23 (normally higher than the set hot water supply temperature. ) And the set hot water supply temperature set by the hot water supply remote controller 61 by the user or the like, so that the hot water after the hot and cold water mixing becomes the set hot water supply temperature so that the water flowing through the bypass passage 24 and the hot water flowing through the hot water passage 23 are mixed. The ratio is calculated, and a command is issued to the hot and cold water mixing means 25 so that the calculated ratio is obtained. Thereby, the hot water from the hot water supply path 23 and the non-heated water from the bypass path 24 are mixed at an appropriate mixing ratio, become hot water at a predetermined hot water supply temperature, and flow into the hot water supply path 26.

Next, control of the hot water temperature of the hot water storage tank 12 will be described with reference to FIG. In the hot water supply apparatus according to the present invention, the heat exchange in the hot water supply heat exchange coil 22 is not directly performed by the heat exchange by the heat of combustion in the combustion can body 10,
Since the water in the hot water supply heat exchange coil 22 passing through the hot water in the hot water storage tank 12 heated by the combustion heat is secondarily indirectly heated, the water in the hot water supply heat exchange coil 22 is heated. Although the temperature of the hot water does not exceed the temperature of the hot water in the hot water storage tank 12 and becomes extremely high, the temperature of the water in the hot water storage tank 12 is maintained so that the water can function as a heating medium at any time. There is a need. Further, after the actual hot water supply operation is started, the temperature of the hot water as the heat exchange medium in the hot water storage tank 12 decreases due to the heat exchange, and it is necessary to perform heating to compensate for this.

Now, when the main operation switch of the hot water supply operation is turned on by the hot water supply remote controller 61 or the like, regardless of whether the actual hot water supply operation or other actual operation is being performed, the controller 50 first operates the hot water storage temperature sensor. The temperature of the hot-water storage tank 12 is detected by 12a, and it is determined whether the hot-water storage temperature is lower than a target maintenance temperature that is a constant temperature, for example, 80 ° C. (step S1). In this case (yes in step S1), the oil burner 13 is operated to burn at the maximum capacity, for example, No. 25.5 (No. 1 heats 1 liter of water by 25 ° C. per minute) (step S2). The combustion operation of the oil burner 13 in step S2 is not necessarily the operation at the maximum capacity, but may be the operation at a high capacity.

After the hot water storage temperature once reaches the target maintenance temperature by the combustion at the maximum capacity performed after the main operation switch is turned on (No in step S1), the controller 50 responds to the detected hot water storage temperature. Combustion operation of oil burner with capacity. That is, whether the hot water storage temperature is lower than 65 ° C. (step S3), lower than 70 ° C. (step S5), 7
Depending on whether the temperature is less than 5 ° C. (step S8) or less than 80 ° C. (step S11), the number of combustions decreases as the temperature is closer to the target maintenance temperature, and the number of combustions increases as the distance from the target maintenance temperature increases. That is, when the hot water storage temperature is lower than 65 ° C. (Yes in step S3), combustion is performed with the maximum number of No. 25.5 (step S4). If the hot water storage temperature is equal to or higher than 65 ° C. and lower than 70 ° C. (Yes in step S5), combustion is performed at No. 20 which is slightly lower than the maximum number (step S5).
6) In this case, if the hot water storage temperature falls below 60 ° C. (Yes in step S7), the number of combustions is increased to the maximum number of 25.5 (step S4). When the hot water storage temperature is 70 ° C. or higher and lower than 75 ° C. (Yes in step S8)
In step S9, combustion is performed at step S9, and in this case, when the hot water storage temperature falls below 65 ° C. (step S1).
If the answer is 0, the number of combustions is increased to 20 (step S6). If the hot water storage temperature is 75 ° C. or higher and lower than 80 ° C. (target maintenance temperature) (Yes in step S11), 1
Combustion is performed in No. 2 (Step S12). In this case, if the hot water storage temperature falls below 70 ° C. (Yes in Step S13), the number of combustion is increased to 16 (Step S12).
9). If the hot water storage temperature is equal to or higher than the target maintenance temperature of 80 ° C. (No in step S11), combustion is performed in No. 10 (step S14). If the hot water storage temperature falls below 75 ° C. by the combustion of No. 10 (Yes in step S15), the number is increased to 12 (step S1).
2). On the other hand, if the hot water storage temperature becomes equal to or higher than the upper limit temperature, for example, 85 ° C. (Yes in Step S16) by the combustion in the aforementioned No. 10, the combustion of the oil burner 13 is stopped (Step S17). When the temperature of the hot water storage drops due to the stop of the combustion and becomes lower than the lower limit temperature, for example, 75 ° C. (step S18).
Then, the process returns to step S14 to start combustion at No. 10. In the above, the target maintenance temperature does not necessarily need to be 80 ° C., and another appropriate temperature can be adopted in advance by experiments. The upper limit temperature and the lower limit temperature are temperatures at which the hot water storage temperature is to be maintained between them, 85 ° C. and 75 ° C., respectively. However, other appropriate temperatures can be adopted in advance by experiments. Further, in the above, the temperature of the hot water tank for changing the number of combustion
C., 70.degree. C., 75.degree. C. (lower limit temperature) and 80.degree. C. (target maintenance temperature), but other appropriate temperatures may be adopted. Further, the number of combustions does not necessarily need to be the number described in the above example, and other appropriate numbers may be adopted in advance by experiments.

Next, temperature control of a hot water tank according to another embodiment of the present invention will be described with reference to FIG. In this embodiment, when the main operation switch of the apparatus is turned on, regardless of whether the actual hot water supply operation or other actual operation is being performed, the controller 50 firstly operates the hot water storage tank 12 by the hot water storage temperature sensor 12a. Detect temperature,
Target maintenance temperature at which the hot water storage temperature is constant, for example, 80 ° C.
It is determined whether it is less than (Step S21), and if it is less (usually less than 80 ° C.) (Step S21).
21), the oil burner 13 is brought to maximum capacity, for example 2
The combustion operation is performed by using No. 5.5 (No. 1 is an amount of heat for raising 1 liter of water by 25 ° C. per minute) (step S22). The control up to this point is the same as steps S1 and S2 of the control flow of the embodiment described above. In the above description, the combustion operation of the oil burner 13 in the step S21 is not necessarily the operation at the maximum capacity, but may be the operation at a high capacity.

After the hot water storage temperature once reaches the target maintenance temperature by the combustion at the maximum capacity performed after the main operation switch is turned on (No in step S21), the controller 50 sets the hot water storage temperature to the upper limit temperature, for example, 85. It is determined whether the temperature is equal to or higher than C (Step S23). If the temperature is lower than the predetermined temperature (No in Step S23), the burner 13 is burned at a constant low capacity, for example, No. 10 (Step S2).
4). If the hot water storage temperature is equal to or higher than the upper limit temperature in Step 23 (Yes in Step S23), the combustion is stopped (Step S23).
25). When the combustion is stopped, the hot water storage temperature becomes lower than the lower limit temperature, for example, 75 ° C. (step S26).
Then, the combustion at No. 10 is started again (steps S23 and S24). In the above, step S24
The combustion operation of the oil burner 13 was specifically set at 10 as a constant low capacity, but the specific number was 10
The number need not be a number, and another appropriate number may be determined in advance by experiment and adopted. In addition, target maintenance temperature, upper limit temperature,
As for the lower limit temperature, another appropriate number may be adopted as described above.

[0021]

According to the present invention, there is provided a hot water supply apparatus comprising: an oil burner;
Having a combustion can body provided with a hot water tank heated by combustion, and arranging a hot water supply heat exchange unit of the hot water supply circuit in the hot water storage tank, thereby allowing water passing through the hot water supply heat exchange unit to pass through the hot water storage tank. To supply the hot water by indirectly heating it indirectly with the hot water inside
In addition to the hot water supply operation, a bath reheating using the hot water storage tank
Hot water and / or heating operation
The operation can be performed simultaneously with the operation, and the combustion can
Combustion by an oil burner stops combustion when the temperature of the hot water tank reaches a predetermined upper limit temperature, and restarts combustion when the temperature of the hot water tank falls below the predetermined lower limit temperature, regardless of whether or not the actual hot water supply operation is performed. Water heater
Wherein the combustion of the combustion can body by the oil burner is
Once the heat retention and heating of the hot water tank is started, the temperature of the hot water storage tank once becomes
Preset target maintenance temperature between the upper limit temperature and the lower limit temperature
Combustion with high capacity until the temperature reaches
After reaching the target maintenance temperature, the combustion capacity according to the temperature of the hot water tank
Combustion is performed by power, so the main operation of the device
Once the switch is turned on and heating of the hot water tank starts, once
Combustion of oil burner with high capacity until target maintenance temperature is reached
Is performed, the target maintenance temperature is set to the upper limit temperature of the hot water tank.
By setting the temperature between the lower limit temperature and the lower limit temperature,
Quickly adjust the temperature of the water bath to a state where heat exchange heating is possible
can do. Therefore, preparation for actual hot water supply is quick.
It is prepared smoothly, and the specified hot water is supplied from the beginning.
Is possible, and the convenience of hot water supply is improved. Of course, saving
Once the temperature of the water bath reaches the target maintenance temperature, the oil bar
Since the combustion of na is performed with the combustion capacity according to the temperature of the hot water tank,
Temperature maintenance with low fuel consumption and low noise
Can be held. Further, according to the hot water supply apparatus of claim 2, the hot water storage heated by the on / off combustion of the oil burner
Heat exchange unit for hot water supply in a hot water supply circuit, having a combustion can body with a tank
Is placed in the hot water storage tank to allow the hot water supply heat exchange section to pass through.
Water is indirectly secondarily heated by hot water in the hot water tank.
Hot water supply operation to supply hot water
Either bath reheating operation using a tank or heating operation
Or both can be operated simultaneously with the hot water supply operation
The burning of the combustion can body by an oil burner is actually
The temperature of the hot water storage tank is preset regardless of whether
When the temperature reaches the upper limit temperature, the combustion is stopped and the hot water tank is stopped.
Combustion is restarted when the temperature of the
A hot water supply device, comprising:
Combustion by the burner starts when the heating and heating of the hot water storage tank is started.
Once the temperature of the hot water storage tank is between the upper limit temperature and the lower limit temperature,
Combustion with high capacity until the set target temperature is reached
And once the temperature reaches the target maintenance temperature,
Since it is configured to perform combustion at a low capacity of, and Riae not a can quickly adjust the temperature of the hot water storage tank to the heat exchanger heatable state, to lay quickly prepare for in actual hot water Can be. Thereby, predetermined hot water can be heated and heat-exchanged quickly to supply hot water from the beginning, thereby improving the usability of hot water supply. Once again,
After reaching the holding temperature , the temperature of the hot water tank is controlled to be between the upper limit temperature and the lower limit temperature by performing on / off control with a constant low capacity combustion, so that the degree of the constant low capacity combustion is previously determined. By setting an appropriate capacity through an experiment, it is possible to reduce waste of fuel and maintain the temperature in a state of low noise.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply apparatus according to an embodiment of the present invention.

FIG. 2 is a temperature control flow chart of hot water in a hot water storage tank of the combustion can body according to the embodiment of the present invention.

FIG. 3 is a temperature control flow chart of a hot water tank according to another embodiment of the present invention.

[Explanation of symbols]

10. Combustion can body 11 Combustion chamber 12 Hot water storage tank 12a Hot water storage temperature sensor 13 Oil burner 20 Hot water supply circuit 21 Waterway 22 Heat exchange coil for hot water supply 23 Deyuro 24 Bypass Road 25 Hot water mixing means 26 Hot water supply channel 26a Hot water supply temperature sensor 27 Hot water path for bathtub 28 Total flow control means 29 Hot water supply terminal 30 Circulation circuit for bath reheating 40 heating circuit 50 Controller 61 Remote control for hot water supply 62 bath remote control 63 heating remote control

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24D 3/08 F23N 5/00 F24D 17/00 F24H 1/18 302

Claims (2)

(57) [Claims] 1. Heating by on-off combustion of a petroleum burner
A combustion can body having a hot water tank that is, the hot water supply heat exchanger of the hot water supply circuit by arranging the hot water storage tank, the water passing through the heat exchanger for hot water supply by hot water of the hot water storage tank In the hot water supply operation that supplies hot water by indirectly heating secondary
In addition, bath reheating operation and heating operation using the hot water storage tank
Either or both of the hot water supply operation and the simultaneous operation
When the temperature of the hot water storage tank reaches a predetermined upper limit temperature, regardless of whether or not an actual hot water supply operation is performed, the combustion of the combustion can body by the oil burner is stopped and the temperature of the hot water storage tank is reduced. A water heater that restarts combustion when the temperature falls below a predetermined lower limit temperature.
The burning of the baking can by the oil burner is achieved by heating and heating the hot water tank.
Once started, once the temperature of the hot water tank is
Until the preset target maintenance temperature between degrees is reached
Combustion with high performance and once reaching the target maintenance temperature
After that, it will burn with the combustion capacity according to the temperature of the hot water tank.
Water heater, characterized in that the sea urchin configuration. 2. Heating by on-off combustion of a petroleum burner
Hot water supply in a hot water supply circuit having a combustion can body provided with a hot water storage tank
By disposing the heat exchange section for hot water in the hot water storage tank,
Water passing through the exchange section is secondary by the hot water in the hot water tank.
Hot water supply operation that supplies hot water by indirect heating to
In addition, bath reheating operation and heating operation using the hot water storage tank
Either or both of the hot water supply operation and the simultaneous operation
And the oil burner of the combustion can body
Combustion occurs in the hot water tank regardless of the actual hot water supply operation.
Stop combustion when temperature reaches a predetermined upper limit temperature
When the temperature of the hot water tank falls below the predetermined lower limit temperature
A water heater for restarting combustion, wherein the fuel
The burning of the baking can by the oil burner is achieved by heating and heating the hot water tank.
Once started, once the temperature of the hot water tank is
Until the preset target maintenance temperature between degrees is reached
Combustion with high performance and once reaching the target maintenance temperature
The hot water supply device is configured to perform combustion with a constant low capacity after the heat treatment.