JP2001173965A - Hot water heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hot water heating equipment which can prevent its service life from being shortened by reducing the repeating times of combustion stopping and restarting operations, can reduce the energy consumption and noise at the time of operating a circulation pump, and can suppress the fuel consumption and noise at the time of making recombustion. SOLUTION: The operation of the hot water heating equipment for heating is controlled by switching the temperature control pattern of the equipment among a first pattern in which the combustion amount is proportionally controlled when a detected hot water temperature is in a temperature zone before and after a set hot water temperature, the maximum combustion is fixed when the detected temperature is lower than the temperature zone, or the minimum combustion is fixed when the detected temperature is higher than the temperature zone, but lower than a combustion stopping temperature, in a situation where the circulation pump is strongly operated; a second pattern in which recombustion is made in intermediate combustion when the detected temperature drops to a recombustion temperature and, at the same time, the combustion amount is proportionally controlled in a temperature zone before and after the recombustion temperature, the maximum combustion is fixed when the detected temperature is lower than the temperature zone, or the minimum combustion is fixed when the detected temperature is higher than the temperature zone, but lower than the combustion stopping temperature, in another situation where the circulation pump is weakly operated; and a third pattern in which recombustion is made in the minimum combustion when the detected temperature drops to the recombustion temperature in the situation where the circulation pump is weakly operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating apparatus for heating a room or the like by circulating hot water heated by heat exchange by a circulation pump.

[0002]

2. Description of the Related Art Conventionally, as this type of hot water heating apparatus, there is, for example, Japanese Patent Application Laid-Open No. 9-303798. This includes controlling the output of the circulation pump by changing the output of the circulation pump in accordance with the output characteristics of the gas amount controller controlled by the detection value of the hot water temperature sensor provided downstream of the heat exchanger in the hot water heating device, that is, controlling the hot water. Control by changing the rotation speed of the circulation pump in accordance with the combustion amount of the heater to be heated, or by changing the output of the circulation pump based on the detection value of the hot water temperature sensor provided upstream of the heat exchanger, that is, before heating, A control of a hot water heating device that changes the rotation speed of a circulation pump in accordance with the temperature of hot water is disclosed.

As a result, the output of the circulating pump, that is, the pump output corresponding to the operating state of the hot water heating device becomes higher than that of a circulating pump having a constant rotational speed, thereby achieving energy saving and silent operation.

In Japanese Patent Application Laid-Open No. H10-110959,
The temperature detected by the hot water thermistor is the first when the heating operation starts.
When the temperature is equal to or higher than the predetermined temperature, the combustion portion is set to weak combustion after ignition, and when the water temperature detected at predetermined time intervals is higher than the first predetermined temperature and equal to or lower than the second predetermined temperature, the combustion amount is gradually increased. A control of the hot water heating device to be raised is disclosed.

[0005] Thus, compared to the control in which the combustion is started by the strong combustion at the start of the heating operation and the amount of combustion is reduced stepwise as the temperature of the hot water rises, the heating in which the temperature of the hot water sharply rises in the strong combustion. Even when the load is small, the temperature of the hot water is prevented from rising sharply at the start of combustion and the water temperature is gradually increased, so that the number of times of stopping and reburning the combustion can be reduced, thereby reducing the stress on the equipment and shortening the service life. Can be prevented from becoming shorter.

In this conventional apparatus, for example, in the case of a hot water heating apparatus disclosed in Japanese Patent Application Laid-Open No. 9-303798, when the heating load is small, the temperature of the hot water rapidly rises in a short time due to combustion at the start of heating, and the combustion is stopped immediately after ignition. Therefore, there is a problem that the stop of the combustion and the re-combustion are frequently repeated, thereby shortening the life of the hot water heating apparatus.

In the case of the hot water heating apparatus disclosed in Japanese Patent Application Laid-Open No. H10-110959, when the heating load is large and the temperature of the hot water is equal to or higher than the first predetermined temperature, the heating operation starts, that is, the combustion becomes weak after the completion of ignition. Since the temperature does not rise easily and control is not performed by changing the rotation speed of the circulation pump, the rise of heating from the start of heating operation is slow, and energy saving of the operation of the circulation pump has not been made. There was a problem.

In order to solve the above-mentioned problems, the applicant of the present invention controls the combustion amount proportionally when the hot water detection temperature is in the temperature range around the hot water set temperature by the strong operation of the circulation pump. The first temperature regulation control pattern in which combustion is constant and the minimum combustion is constant over the temperature range up to the combustion stop temperature, and when the combustion is stopped and the combustion is stopped until the reburn temperature after the combustion is stopped by the circulating pump weak operation, and when the temperature drops to the reburn temperature. The second temperature regulation control in which combustion is recombusted and the combustion amount is proportionally controlled in a temperature zone before and after the reburning temperature, and the maximum combustion is constant below the temperature zone and the minimum combustion is constant beyond the temperature zone until the combustion stop temperature. Japanese Patent Application No. 11-298 discloses a hot water heating apparatus that performs heating operation control by switching between patterns.
No. 564 was filed earlier.

[0009]

By the way, in the prior application, when the heat load is small and the detected temperature of the hot water rises to reach the combustion-off temperature even in the second temperature control pattern, the second temperature control pattern is used. The combustion is stopped and re-combusted repeatedly based on the following criteria.Each time re-combustion is repeated, re-combustion starts from medium combustion. Since the amount of air also changed, the combustion noise and the rotation sound of the blower for blowing the combustion air changed, and the change in the combustion sound and the rotation sound of the blower occurred as one of the noises when the heating load was small. .

[0010] Further, since the re-combustion is repeated based on the second temperature control pattern, even when the heating load is small at the time of the re-combustion and the medium combustion is not required as the combustion amount, the re-combustion is started from the middle combustion and the fuel is accordingly increased. However, there was a problem that the wasted was excessively consumed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a comfortable heating operation irrespective of the magnitude of the heating load, while reducing the repetition of stopping and reburning the hot water. In addition to preventing the life of equipment of the heating device from being shortened, the power consumption of the operation of the circulating pump is reduced by controlling and changing the rotation speed of the circulating pump, thereby saving energy and reducing noise, and further heating. It is an object of the present invention to further reduce the noise at the time of reburning when the load is small and to suppress energy consumption to save energy.

[0012]

The present invention focuses on this point, and in order to solve the above-mentioned drawbacks, in particular, in the present invention, a heat exchanger for heating water and a heater for heating the heat exchanger are described in claim 1. A hot water thermistor for detecting the temperature of the hot water, a hot water temperature setting means for setting the temperature of the hot water, and a circulation pump for conveying the heated hot water, and a hot water radiator provided in the room. In a hot water heating apparatus that forms a circulation path and circulates the hot water circulation path by a circulation pump that changes the output of heated hot water, the heating operation of the hot water heating apparatus includes a first temperature control pattern and a second temperature control. The first temperature control pattern is controlled by a pattern and a third temperature control control pattern, and the circulating pump performs the combustion amount proportional control when the detected temperature of the hot water reaches a temperature zone including the set temperature of the hot water in the strong operation, The detected temperature of hot water is higher When the temperature reaches the combustion-off temperature, the combustion is stopped and the temperature control control pattern is switched. In the second temperature-control control pattern, the circulating pump is operated in a weak mode and the detection temperature of the hot water reaches the combustion-off temperature and the combustion is stopped. When the temperature drops and reaches the combustion-on temperature, re-combustion is performed during combustion, and while the detected temperature of the hot water is in the temperature range including the combustion-on temperature, the combustion amount proportional control is performed. When the pattern switching temperature is reached, the temperature control control pattern is switched. In the third temperature control pattern, the circulating pump is operated in a weak mode, the detection temperature of hot water reaches the combustion off temperature, and after the combustion is stopped, the detection temperature of hot water decreases. When the combustion ON temperature is reached, re-combustion is performed with the minimum combustion.If the detected temperature of the hot water after re-burning rises, the minimum combustion is constant. By increasing the amount in which switched temperature control pattern.

[0013] In the hot water heating apparatus according to a second aspect of the present invention, in particular, in the first aspect, in the first temperature control pattern, the detected temperature of the hot water is lower than the first proportional lower limit temperature. When the maximum combustion is constant, including the set temperature of hot water
The combustion amount proportional control is performed from the proportional lower limit temperature to the first proportional upper limit temperature, the combustion amount control is performed at a minimum combustion constant higher than the first proportional upper limit temperature to the combustion off temperature, and the second temperature control control pattern includes In one temperature control pattern, the temperature is switched when the detected temperature of the hot water reaches the combustion-off temperature and the combustion is stopped, and the combustion is stopped from the combustion-off temperature to the combustion-on temperature,
From the second proportional upper limit temperature including the combustion ON temperature to the second proportional lower limit temperature, the combustion amount proportional control is performed, the maximum combustion is constant below the second proportional lower limit temperature to the pattern switching temperature, and when the pattern switching temperature falls, The control mode is switched to the first temperature control pattern, and the combustion amount is controlled so that the minimum combustion is constant from the second proportional upper limit temperature to the combustion off temperature. The third temperature control pattern is the detected temperature of hot water in the second temperature control pattern. Will switch when combustion reaches the combustion-off temperature and combustion stops.
The combustion is stopped from the combustion off temperature to the combustion on temperature, and when the temperature drops to the combustion on temperature, recombustion is performed with the minimum combustion. If the detected temperature of the hot water does not rise, the amount of combustion is increased until medium combustion, and the mode is switched to the second temperature control pattern.

[0014]

According to the first aspect of the present invention, in the first temperature control pattern, the circulating pump is operated at a constant strong operation, so that the amount of heat released by the indoor radiator is increased. It can accelerate the rise of indoor heating, and when the detected temperature of hot water reaches a temperature around the set temperature, the amount of combustion is proportionally controlled with respect to the detected temperature of hot water. The number of times of stopping and reburning the combustion can be reduced to prevent the life of the device from being shortened.

In the second temperature control pattern, the temperature of the room increases as the temperature of the hot water rises by the first temperature control pattern before the pattern switching and the temperature of the hot water reaches the combustion-off temperature, and the heat load increases. Since the circulating pump is kept at a low level, the power consumption of the circulating pump can be reduced and energy-saving operation can be performed.In addition, the amount of heat radiated by the indoor radiator is reduced and the indoor temperature becomes too high. In addition, when the temperature of the hot water drops to the combustion-on temperature, the fuel is re-burned during the combustion, and while the detected temperature of the hot water is in the temperature zone including the combustion-on temperature, the combustion amount proportional control is performed. At the start, if the heat load is large and the amount of combustion in medium combustion is small and the temperature of hot water further decreases, the amount of combustion is increased proportionally to increase the amount of heat released by the indoor radiator, and conversely Sometimes the heat load is small and the amount of combustion is large in medium combustion and if the temperature of hot water rises, the amount of combustion is reduced in proportion to that and the amount of heat released by the radiator in the room is made smaller than that in medium combustion, thereby The amount of heat radiated by the radiator is set to be slightly larger than that before re-burning, so that the indoor temperature can be prevented from rising, and comfortable heating can be performed.

In the third temperature control pattern, the heat load is further reduced as the temperature of the hot water increases and the temperature of the hot water reaches the combustion-off temperature in the second temperature control pattern before the pattern switching. Therefore, at the time of reburning, the circulating pump is set to a weak operation constant in the same manner as in the second temperature control control pattern, so that power consumption of the circulating pump can be suppressed and energy saving operation can be performed, and the amount of heat radiation by the indoor radiator is minimized. The room temperature is prevented from rising, and when the temperature of the hot water drops to the combustion-on temperature, re-combustion is performed with the minimum combustion. If it further decreases, increase the amount of combustion to medium combustion, increase the amount of heat released by the indoor radiator,
Conversely, if the heat load is small at the start of reburning and the amount of combustion is large even at the minimum combustion and the hot water temperature rises, the amount of heat released by the indoor radiator is minimized by keeping the amount of combustion at the minimum combustion and the indoor temperature is reduced. Since the combustion can be prevented from rising and the re-combustion starts with the minimum combustion, the amount of combustion does not decrease any more after the start of the re-combustion. To reduce energy consumption by further reducing noise and suppressing fuel consumption when the heating load is small, with no change in combustion noise or blower rotation noise accompanying a change in the amount of combustion, which is small and the amount of combustion is decreasing. Can be done.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water heating apparatus according to the present invention will be described below with reference to an embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a hot water heating apparatus main body according to the present embodiment, which passes hot water heated by heat exchange in the hot water heating apparatus main body 1 from an access pipe 2 through a radiator 3 such as a floor heating panel or a panel heater. After the heat is radiated, a hot water circulation path 5 for returning the hot water heating apparatus main body 1 from the return pipe 4 is formed.

The hot water heating apparatus main body 1 includes a blower 6 for blowing combustion air, a constant oil level unit 7 for constantly storing a fixed amount of fuel oil, and a fuel pump 8 for supplying the fuel oil of the constant oil level unit 7.
And a burner unit 9 for burning with the supplied combustion air and the supplied fuel oil, and a can 1 for storing hot water circulating therein.
0, a hot water thermistor 11 provided in the can body 10 for detecting the temperature of the hot water in the can body 10, and a hot water thermistor 11 provided in the can body 10 and heated by the combustion of the burner portion 9 to be heated. A heat exchanger 12 for exchanging heat with hot water in the inside, a circulating pump 13 of variable output for circulating hot water in the can body 10 to the hot water circulation path 5, and provided between the circulating pump 13 and the can body 10. And a steam-water separator 14 for separating the air in the warm water from the warm water.

The operation unit 15 provided in the hot water heating apparatus main body 1 or the remote control 16 installed in the room or the like,
When the operation of starting or stopping the heating operation is performed, the operation unit 15
Alternatively, a start signal or a stop signal of the heating operation is output from the remote controller 16 to the control unit 18 in the hot water heating device main body 1 via the signal line 17, and the heating operation of the hot water heating device is controlled accordingly.

The control unit 18 in the hot water heating apparatus main body 1 is constituted by an electronic circuit, and as shown in FIG.
9, a memory 20 for storing a set temperature T of the hot water set by operating the operation unit 15 or the remote controller 16 and each control temperature calculated and set based on the set temperature T; A comparison circuit 21 for comparing the stored set temperature T of hot water and each control temperature with a detected temperature t of the hot water thermistor 11 of the can 10;
And a pump drive circuit 22 for variably controlling the output of No. 3 for controlling the operation of the hot water heating apparatus.

Next, the operation of the hot water heating apparatus of this embodiment will be described with reference to FIG.
4 and FIG. First, the control unit 18 of the hot water heating apparatus main body 1 operates the operation unit 15 or the remote control 16 of the hot water heating apparatus main body 1 to reset the set temperature T of the hot water (S1). Based on the first proportional lower limit temperature T1, the first proportional upper limit temperature T2, the combustion off temperature T3, the combustion on temperature T4, the second
Each control temperature of the proportional lower limit temperature T5, the second proportional upper limit temperature T6, and the pattern switching temperature T7 is set. (S2)

In this embodiment, the set temperature T of the hot water is 30 to
80 ° C., and the first proportional lower limit temperature T
1 = (T−3) ° C., first proportional upper limit temperature T2 = (T + 1)
° C, combustion off temperature T3 = (T + 5) ° C, combustion on temperature T
4 = (T−5) ° C., second proportional lower limit temperature T5 = (T−7)
The control temperatures are set based on an arithmetic expression of ° C, the second proportional upper limit temperature T6 = (T-4) ° C, and the pattern switching temperature T7 = (T-10 ° C).

Here, the temperature range from the first proportional lower limit temperature T1 to the first proportional upper limit temperature T2 is widened to finely control the combustion amount near the set temperature of the hot water temperature so that the hot water temperature is maintained near the set temperature. And the temperature range from the second proportional lower limit temperature T5 to the second proportional upper limit temperature T6 is reduced so that the amount of combustion is varied with respect to a slight change in the hot water temperature after recombustion, and the heat after combustion is stopped. This is to make the combustion amount quickly correspond to a change in load.

The operation unit 15 of the hot water heating apparatus main body 1
Alternatively, when the heating operation is started by operating the remote controller 16 (S
3) A heating start signal is output from the operation unit 15 or the remote controller 16 to the control unit 18 in the hot water heating apparatus main unit 1;
Thereby, the control unit 18 starts the maximum combustion in the burner unit 9 according to the first temperature control pattern A in which the circulation pump 13 is set to the strong operation with priority given to the heating indicated by the solid line in FIG. 4 (S4). At the same time, the heating operation of the circulation pump 13 is started with the strong operation. (S5)

As described above, the heating operation is started by the maximum operation of the circulation pump 13 and the hot water thermistor 1 is started.
When the hot water detection temperature t in the can body 10 detected by 1 rises and reaches the first proportional lower limit temperature T1 (S6), the combustion in the burner unit 9 as shown in FIG. From the maximum combustion constant a to the combustion amount proportional control b, the combustion amount is finely controlled so as to maintain the hot water at the set temperature. (S7) When the hot water detection temperature t becomes higher than the first proportional lower limit temperature T1, the combustion amount gradually decreases, and when the hot water detection temperature t reaches the first proportional upper limit temperature T2 (S8), The amount of combustion is minimal. (S9)

Then, the hot water detection temperature t further rises and the first
When the temperature becomes higher than the proportional upper limit temperature T2, as shown in FIG. 4C, the heating operation is performed in the state of the circulating pump 13 strong operation with the minimum combustion constant until the hot water detection temperature t reaches the combustion off temperature T3.

The hot water detection temperature t is the combustion off temperature T3
(S10), the control unit 18 reduces the repetition of stopping and re-burning the combustion from the first temperature control pattern A in which the circulation pump 13 is set to the strong operation with priority on heating, thereby saving energy of the circulation pump 13. Circulation pump 1 giving priority to silent operation
The temperature control pattern is switched to the second temperature control pattern B shown by the broken line in FIG.
1) Accordingly, as shown in FIG. 4D, the combustion of the burner unit 9 is stopped, and the heating operation is performed by switching the circulation pump 13 from the strong operation to the weak operation. (S12)

Then, the hot water is circulated and radiated by the radiator 3 in a state where the combustion of the burner section 9 is stopped, so that the hot water gradually becomes lower than the combustion off temperature T3. Then, when the detected hot water temperature t decreases to the combustion-on temperature T4 (S13), the control unit 18 causes the burner unit 9 to re-combust in the middle combustion while the circulation pump 13 is still running. (S14)

When the re-combustion is started in the middle combustion, the combustion amount at that time is controlled by the combustion amount proportional control e as shown in FIG.
(S15), and after the start of reburning, the hot water detection temperature t
If the temperature is lower than the proportional upper limit temperature T6 (S16), and if the temperature is higher than the second proportional lower limit temperature T5, the combustion amount proportional control e is continued. When the temperature becomes lower than the second proportional lower limit temperature T5 (S17), the heating operation is performed with the maximum combustion being constant and the circulation pump 13 being weakly operated until the hot water detection temperature t reaches the pattern switching temperature T7 as shown in FIG. Will be (S1
8)

When the hot water detection temperature t finally drops to the pattern switching temperature T7 (S19), the control unit 18 switches the temperature control pattern from the second temperature control pattern B to the first temperature control pattern A (S20). ), The heating operation is performed by switching the circulation pump 13 from the weak operation to the strong operation while keeping the combustion of the burner section 9 at the maximum combustion. (S5)

When the detected hot water temperature t rises above the on-combustion temperature T4 after the start of the reburning, the amount of combustion gradually decreases from the medium combustion correspondingly, and the detected hot water temperature t reaches the second proportional upper limit temperature T6. When this happens, the amount of combustion is minimal.

Then, the hot water detection temperature t further rises and the second
When the temperature becomes higher than the proportional upper limit temperature T6 (S16), f in FIG.
Until the hot water detection temperature t reaches the combustion off temperature T3 as described above, the heating operation is performed in the state where the circulation pump 13 is set to the weak operation with the minimum combustion constant. (S21)

Then, the hot water detection temperature t becomes the combustion off temperature T3
Is reached (S22), the control unit 18 reduces the repetition of the stop and reburn of the combustion, sets the circulation pump 13 to the weak operation by giving priority to the energy saving and the silent operation of the circulation pump 13, and the second operation.
From the temperature control control pattern B, while setting the circulation pump 13 to the weak operation with priority given to the energy saving and the silent operation of the circulation pump 13, the repetition of stopping and reburning of the combustion is reduced, and the fuel consumption at the time of the reburn is further reduced. The temperature control control pattern is switched to a third temperature control pattern C shown by a dashed line in FIG. 4 in which the noise generated from the hot water heating device during reburning is minimized and the noise is extremely reduced. (S23)

Accordingly, the heating operation is performed by stopping the combustion of the burner unit 9 while the circulation pump 13 is in the weak operation as shown in FIG. (S24)

Then, the hot water is circulated and radiated by the radiator 3 in a state where the combustion in the burner section 9 is stopped, so that the hot water gradually becomes lower than the combustion off temperature T3. Then, when the detected hot water temperature t decreases to the combustion-on temperature T4 (S25), the control unit 18 re-burns the burner unit 9 with the minimum combustion as shown in FIG. (S26)

After the start of reburning with the minimum combustion, the hot water detection temperature t
If the temperature is equal to or higher than the combustion on temperature T4 (S27), the heating operation is performed with the minimum combustion constant and the circulation pump 13 in the weak operation until the hot water detection temperature t reaches the combustion off temperature T3 as shown in FIG. When the detected hot water temperature t reaches the combustion-off temperature T3 (S29) in this state (S29), the combustion of the burner unit 9 is stopped and the heating operation is performed while the circulating pump 13 is in a weak operation (S24). When the detected hot water temperature t decreases to the combustion-on temperature T4 (S25), the controller 18 returns to the circulation pump 13 based on the third temperature control pattern C.
The burner section 9 is recombusted with minimum combustion as shown in FIG. (S26)

If the detected hot water temperature t does not become equal to or higher than the combustion ON temperature T4 after the start of reburning (S27), the controller 1
8 correspondingly increases the combustion amount from the minimum combustion to the medium combustion (S30), and switches the temperature control pattern from the third temperature control pattern C to the second temperature control pattern B (S3).
1) The combustion amount is controlled by a combustion amount proportional control e at that time to perform a heating operation. (S15)

As described above, during the heating operation, the amount of combustion and the number of revolutions of the circulation pump 13 are reduced by the first temperature control control pattern with the priority on heating, and the repetition of stopping and reburning the combustion is reduced to save energy and reduce the noise of the circulation pump 13. The second temperature control pattern that prioritizes operation, prioritizes energy saving and silent operation of the circulating pump 13 by reducing the repetition of combustion stop / reburn, and further minimizes fuel consumption during reburn and reburn. By switching and controlling the three temperature control patterns with the third temperature control pattern C, which thoroughly suppresses noise, when the hot water temperature and the room temperature are low, such as at the start of the heating operation, the first heating priority is given. The heating operation is started with the maximum combustion in order to quickly raise the temperature of the hot water according to the temperature control control pattern, and the heating operation is started with the circulating pump 13 in the strong operation in order to quickly raise the temperature of the room to be heated. , In which the amount of heat radiated from the radiator 3 from the start of the heating operation can be accelerated to start the heating in the maximum.

Further, when the temperature of the hot water approaches the set temperature T after the heating operation is started, the combustion of the burner section 9 is controlled in proportion to the combustion amount in the first temperature control control pattern in which the heating is prioritized. The combustion amount is controlled so that it does not deviate from
This suppresses vertical fluctuations in hot water temperature and stops combustion.
The number of times of re-burning can be suppressed to prevent the life of the device from being shortened.

After the heating operation is started and the hot water temperature reaches the combustion-off temperature T3 and the combustion is stopped, and when the hot-water temperature drops to the combustion-on temperature T4 and recombustes, the stop of combustion and the recombustion are performed. According to the second temperature control pattern in which the repetition is reduced and the energy saving operation of the circulating pump 13 is prioritized, the reburning is started in the middle combustion by the combustion amount proportional control, so that the temperature of the hot water becomes higher than the combustion on temperature T4 after the start of the reburning. For example, the amount of combustion can be gradually reduced to prevent a sudden rise in the temperature of the hot water due to re-combustion, thereby preventing the combustion from stopping immediately. Conversely, if the temperature falls below the combustion-on temperature T4, the amount of combustion gradually decreases accordingly. To prevent the temperature of the hot water from lowering further.

Further, when a large amount of heat is required by the radiator 3 as in the start of the heating operation, the circulating pump 13 is controlled to the strong operation by the first temperature control control pattern in which the heating is prioritized. When the heating is started up quickly and the hot water temperature rises after the heating operation is started and the combustion is stopped and re-combustion is performed, a large amount of heat radiation such as at the start of the heating operation is often unnecessary. By controlling the circulation pump 13 to a weak operation at the time of re-combustion by the second temperature control control pattern which reduces repetition of combustion stop / reburn and reduces energy consumption of the circulation pump 13 and prioritizes quiet operation, the amount of heat radiation is suppressed and the room temperature is reduced. Can be maintained at the current temperature for comfortable heating,
The energy saving operation can be performed by suppressing the power consumption of the circulating pump 13, and the operation sound of the circulating pump 13 can be suppressed to reduce the noise.

Further, even if the heating operation is controlled by the second temperature control pattern, if the temperature of the hot water rises and combustion stops,
In many cases, the amount of heat radiation required by the radiator 3 may be extremely small. Therefore, while the circulation pump 13 is set to the weak operation with priority given to the energy saving and the silent operation of the circulation pump 13, it is possible to further stop the combustion and re-combustion. The third temperature control pattern, which reduces repetition, further minimizes fuel consumption during re-burning, and reduces noise during re-burning, controls the circulation pump 13 in the weak operation during re-burning, and further controls the amount of combustion. Since recombustion is started with the minimum combustion, the amount of heat radiation can be further suppressed, the room temperature can be maintained at the current temperature, comfortable heating can be performed, the power consumption of the circulating pump 13 can be suppressed, and energy saving operation can be performed. The operation noise of the pump 13 can be suppressed to reduce the noise, the fuel consumption at the time of reburning can be minimized, and the noise generated from the hot water heating device at the time of reburning can be suppressed as much as possible to minimize the noise.

In this embodiment, the hot water detection temperature t is changed to the combustion off temperature T by the heating operation control in the second temperature control pattern.
After stopping the combustion after rising to 3 and switching to the third temperature control pattern, the present invention is not limited to this. The control may be switched to the temperature control pattern, and after confirming that the heat load is sufficiently small, the control is switched from the second temperature control pattern to the third temperature control pattern. When switching to the control pattern and re-burning with minimum combustion, the hot water detection temperature t
Rarely switches the temperature control pattern from the third temperature control pattern to the second temperature control pattern again without becoming higher than the combustion-on temperature T4, and stably performs the heating operation control based on the third temperature control pattern. Is what you can do.

Further, in this embodiment, the hot water heating apparatus main body 1 stores hot water in the can 10 and heats the hot water in the can 10 by heat exchange in the heat exchanger 12. 1
Although it was of a hot-water storage type that detects the temperature of the hot water inside 0, the present invention is not limited to this, and the hot water returned from the return pipe 4 is heated by the combustion of the burner section 9 in the heat exchanger 12 as shown in FIG. And heated by heat exchange, and the heated hot water is sent out to the radiator via the going pipe 2 by the circulation pump 13, and the change of the hot water circulation amount due to the temperature change of the hot water in the hot water circulation path is calculated as follows. A direct pressure type in which the temperature is adjusted by increasing or decreasing hot water in a cistern tank 23 connected to the upstream side of the heat exchanger 12 may be used.
The hot water whose temperature is detected by the hot water may be hot water going to the hot water heating device or hot water returning to the hot water heating device.

[0045]

As described above, according to the present invention, when the temperature of the hot water and the room temperature are low, such as at the start of the heating operation, the circulating pump is set to the strong operation and the combustion is started at the maximum combustion amount. Since the heating operation is performed according to the first temperature control control pattern, the heating rises quickly, and after the heating operation starts,
When the temperature of the hot water reaches the set temperature, the combustion temperature is controlled in proportion to the combustion amount in the first temperature control pattern of the heating priority, so that the temperature of the hot water does not deviate from the vicinity of the set temperature, and the change in the room temperature is reduced to provide comfortable heating. You can do it.

After the heating operation is started, after the hot water temperature exceeds the set temperature and reaches the combustion-off temperature and the combustion is stopped,
When the hot water temperature is reduced to the combustion on temperature and recombusted, the second temperature control control pattern in which the circulation pump is set to the weak operation and the recombustion is started in the middle combustion by the combustion amount proportional control,
In other words, the heating operation is performed in accordance with the second temperature control control pattern that prioritizes energy saving and silent operation of the circulating pump by reducing the repetition of stopping and reburning of the combustion. As soon as the temperature of the hot water decreases, the amount of combustion can be increased quickly to keep the temperature of the hot water from dropping further and thereby lowering the room temperature. Also, by setting the circulation pump to a weak operation, the power consumption of the circulation pump can be reduced to save energy, and the operation sound of the circulation pump during the heating operation can be suppressed to reduce the noise.

Further, even if the heating operation control is performed according to the second temperature control pattern, the hot water temperature rises to the combustion off temperature after exceeding the set temperature to stop the combustion, and then the hot water temperature drops to the combustion on temperature. In the case of re-combustion, the third temperature control control pattern in which the re-combustion is started with the minimum fuel combustion while the circulation pump is set to the weak operation, that is, the repetition of the stop and re-combustion is further reduced to save the energy of the circulation pump, Heating operation is performed in accordance with the third temperature control control pattern, which minimizes fuel consumption during reburning and silences during reburning while performing silent operation, so after reburning starts even if the heating load is small. In addition, it is possible to prevent the combustion from immediately stopping due to a rapid rise in the temperature of the hot water, and if the temperature of the hot water decreases conversely, quickly increase the amount of combustion to medium combustion and switch to the second temperature control control pattern, whereby the temperature is controlled. It is possible to prevent the temperature from lowering further, thereby lowering the room temperature.Also, by setting the circulating pump to a weak operation, the power consumption of the circulating pump can be reduced to save energy, and the operating noise of the circulating pump during the heating operation can be reduced. This makes it possible to suppress and reduce noise, further minimize the fuel consumption at the time of reburning, and minimize the noise generated from the hot water heating device at the time of reburning, thereby making the noise extremely small.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water heating apparatus to which one embodiment of the present invention is applied.

FIG. 2 is a schematic configuration diagram of the control unit.

FIG. 3 is a flowchart for explaining the operation of the hot water heating apparatus in FIG. 1;

FIG. 4 is an operation characteristic diagram of the combustion amount, the hot water temperature, and the circulation pump.

FIG. 5 is a schematic configuration diagram of a hot water heating apparatus to which another embodiment of the present invention is applied.

[Explanation of symbols]

 Reference Signs List 3 radiator 5 hot water circulation path 9 burner section 11 hot water thermistor 12 radiator 13 circulation pump

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshikata Uchiyama 7-7 Higashi Shinbo, Sanjo City, Niigata Prefecture Corona Co., Ltd. F-term (reference) 3L070 AA09 BB03 DD07 DE01 DE09 DF06 DG02 DG05

Claims (2)

[Claims] 1. A heat exchanger for heating water, a burner for heating the heat exchanger, a hot water thermistor for detecting a temperature of the hot water, a hot water temperature setting means for setting a temperature of the hot water, A circulation pump that conveys hot water, a hot water circulation path is formed between the radiator provided in the room, and a hot water circulation apparatus that circulates the hot water circulation path by a circulation pump that varies the output of the heated hot water. The heating operation of the hot water heater is controlled by a first temperature control pattern, a second temperature control pattern, and a third temperature control pattern. When the detected temperature of the hot water reaches the temperature zone including the set temperature, the combustion amount proportional control is performed. When the detected temperature of the hot water rises and reaches the combustion off temperature, the combustion is stopped and the temperature control control pattern is switched, and the second temperature control is performed. Control pattern The circulating pump is a weak operation, the temperature of the hot water reaches the combustion-off temperature, the combustion is stopped, and after the detection of the temperature of the hot water drops to the combustion-on temperature, the combustion re-combustes and the temperature including the combustion-on temperature is reached. While the detected temperature of the hot water is in the zone, the combustion amount proportional control is performed, and when the detected temperature of the hot water decreases and reaches the pattern switching temperature, the temperature control control pattern is switched. When the detected temperature of hot water reaches the combustion-off temperature and the combustion is stopped in weak operation, and then the detected temperature of hot water drops and reaches the combustion-on temperature after re-burning with minimum combustion, and when the detected temperature of hot water increases after re-combustion Is a constant temperature minimum combustion, and when the detected temperature of the hot water does not rise after reburning, the amount of combustion is increased until medium combustion and the temperature control control pattern is switched. 2. The first temperature regulation control pattern is such that when the detected temperature of the hot water is lower than the first proportional lower limit temperature, the maximum combustion is constant, and the first proportional lower limit temperature including the set temperature of the hot water and the first proportional upper limit temperature. Up to the first proportional upper limit temperature, and perform the combustion amount control with a minimum combustion constant up to the combustion off-temperature. The second temperature control pattern is the detection of hot water in the first temperature control pattern. When the temperature reaches the combustion-off temperature and the combustion is stopped, switching is performed. The combustion is stopped from the combustion-off temperature to the combustion-on temperature, and the combustion amount proportional control is performed from the second proportional upper limit temperature including the combustion-on temperature to the second proportional lower limit temperature. The maximum combustion is constant until the pattern switching temperature is lower than the second proportional lower limit temperature, and when the temperature is lowered to the pattern switching temperature, the control is switched to the first temperature control pattern, and the combustion off temperature is higher than the second proportional upper limit temperature. The third temperature control pattern is switched when the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped in the second temperature control control pattern, and the combustion is controlled from the combustion off temperature. The combustion is stopped until the ON temperature, and when the temperature drops to the combustion ON temperature, recombustion is performed with the minimum combustion.If the detected temperature of hot water after recombustion rises, the minimum combustion is constant until the combustion OFF temperature, and the detected temperature of hot water after recombustion is reduced. 2. The hot water heating apparatus according to claim 1, wherein when the temperature does not rise, the combustion amount is increased until the middle combustion, and the mode is switched to the second temperature control control pattern.