JP3797249B2 - Combustion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combustion apparatus having a function of supplying hot water while heating with a burner whose fuel supply amount is adjusted via a supply amount adjustment valve.
[0002]
[Prior art]
A gas combustion type hot water supply apparatus includes a type that supplies hot water heated by a burner to a hot water heater such as a fan convector while circulating the hot water. The gas supply amount to the burner is adjusted via a supply amount adjustment valve consisting of a permanent magnet and a moving coil, but the overall temperature of the device tends to rise due to the compactness of the entire device, and the temperature of the supply amount adjustment valve rises. It is known that the supply amount of gas is reduced due to such reasons.
[0003]
[Problems to be solved by the invention]
As described above, in the conventional hot water supply apparatus, the gas supply amount decreases due to a rise in the temperature of the supply amount adjustment valve, etc., but with this, combustion control cannot be performed with high accuracy, and there is no consideration regarding this point. The combustion control procedure was defined without any problems.
[0004]
DISCLOSURE OF THE INVENTION
The present invention has been conceived under such circumstances, and provides a combustion apparatus capable of accurately performing combustion control regardless of a temperature rise of a supply amount adjusting valve. It is an issue.
[0005]
In order to solve the above problems, the present invention takes the following technical means.
[0006]
That is, according to the first aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with heating by means of a burner in which the fuel supply amount is adjusted via the supply amount adjustment valve. Based on the hot water temperature detecting means that detects the temperature of hot water that affects the temperature of the hot water, and the temperature detected by the hot water temperature detecting means and the hot water supply operation state, a variable is obtained while adding and subtracting a predetermined amount at each predetermined timing. There is provided a combustion apparatus comprising: a counting means; and a combustion control means for switching a burner combustion control range based on a variable obtained by the counting means.
[0007]
According to the second aspect of the present invention, a combustion apparatus having a function of supplying hot water with a burner while heating, a temperature detection means before heating for detecting the temperature of hot water before being heated by the burner, Based on the temperature detected by the pre-heating temperature detecting means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing, and the burner combustion based on the variable obtained by the counting means There is provided a combustion apparatus comprising combustion control means for switching a control range.
[0008]
According to a third aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with heating by a burner whose fuel supply amount is adjusted via a supply amount adjustment valve, wherein the temperature of the supply amount adjustment valve is Hot water temperature detecting means for detecting the temperature of hot water affecting the atmosphere, atmospheric temperature detecting means for detecting the atmospheric temperature in the apparatus body, both detected temperature by the hot water temperature detecting means and the atmospheric temperature detecting means, and hot water supply operation state And a combustion control means for switching the burner combustion control range based on the variable obtained by the counting means based on the variable obtained by adding and subtracting the predetermined quantity at predetermined timings. A combustion apparatus is provided.
[0009]
According to a fourth aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with a burner while heating the preheated temperature detecting means for detecting the temperature of hot water before being heated by the burner; Based on the ambient temperature detection means for detecting the ambient temperature in the main body of the device, both the detected temperature by the pre-heating temperature detection means and the ambient temperature detection means, and the hot water supply operation state, a predetermined amount is added or subtracted at a predetermined timing. There is provided a combustion apparatus comprising a counting means for obtaining a variable while a combustion control means for switching a combustion control range of the burner based on the variable obtained by the counting means.
[0010]
According to a fifth aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with heating by a burner whose fuel supply amount is adjusted via a supply amount adjustment valve, wherein the temperature of the supply amount adjustment valve is Hot water temperature detecting means for detecting the temperature of hot water affecting the temperature, and a counting means for obtaining a variable while adding or subtracting a predetermined amount at a predetermined timing based on the temperature detected by the hot water temperature detecting means and the hot water supply operation state And a combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means.
[0011]
According to a sixth aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with a burner while heating it, the pre-heating temperature detecting means for detecting the temperature of the hot water before being heated by the burner, Based on the temperature detected by the pre-heating temperature detecting means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing, and the combustion for the burner based on the variable obtained by the counting means Combustion apparatus having combustion control means for correcting and controlling the amount of air is provided.
[0012]
According to a seventh aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water with heating by a burner whose fuel supply amount is adjusted via a supply amount adjustment valve, wherein the temperature of the supply amount adjustment valve is Hot water temperature detecting means for detecting the temperature of hot water affecting the atmosphere, atmospheric temperature detecting means for detecting the atmospheric temperature in the apparatus body, both detected temperature by the hot water temperature detecting means and the atmospheric temperature detecting means, and hot water supply operation state And a combustion control means for correcting and controlling the amount of combustion air with respect to the burner based on the variable obtained by the counting means. A combustion apparatus is provided.
[0013]
According to an eighth aspect of the present invention, there is provided a combustion apparatus having a function of supplying hot water while heating with a burner, the pre-heating temperature detecting means for detecting the temperature of the hot water before being heated by the burner, Based on the ambient temperature detection means for detecting the ambient temperature in the main body of the device, both the detected temperature by the pre-heating temperature detection means and the ambient temperature detection means, and the hot water supply operation state, a predetermined amount is added or subtracted at a predetermined timing. There is provided a combustion apparatus comprising a counting means for obtaining a variable while a combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means.
[0014]
According to a ninth aspect of the present invention, there is provided a combustion apparatus provided with a supply amount adjusting valve for adjusting a fuel supply amount, based on a time measuring means for measuring a combustion time, and a time measured by the time measuring means, There is provided a combustion device comprising correction control means for correcting and controlling the supply amount adjusting valve.
[0015]
According to a preferred embodiment, the timing means initializes the timing amount when not burning.
[0016]
According to another preferred embodiment, the time measuring means subtracts the time amount during non-combustion.
[0017]
According to another preferred embodiment, it is provided with an ambient temperature detection means for detecting the ambient temperature in the apparatus main body, and the correction control means is a supply amount based on the temperature detected by the ambient temperature detection means and the time measured by the time measuring means. Compensate and control the regulating valve.
[0018]
According to the present invention, for example, even in an operating state in which the temperature of the supply amount adjusting valve rises, the burner combustion control range is switched or the combustion air amount is corrected and controlled on the basis of the associated variable and combustion time. Or by directly correcting and controlling the supply amount adjustment valve, combustion control can be performed with high accuracy while maintaining an appropriate combustion state.
[0019]
Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 1 is an overall configuration diagram of a combustion apparatus according to an embodiment of the present invention. The combustion apparatus shown in this figure supplies hot water through a combustion unit 10 for hot water heating for supplying hot water to a hot water heating appliance (not shown) while circulating it, and a faucet A provided in a kitchen or a washroom. Two types of built-in combustion units 20 for general hot water supply are provided. The combustion unit 10 for warm water heating is also operated when performing bath renewal and the like, and is also used for bath retreat. The reheating of the bath is performed by guiding the circulating hot water for heating and the circulating hot water for the bath heated by the combustion unit 10 to the bath heat exchanger 80. Each of the combustion units 10 and 20 can be started or stopped through an operation remote controller (not shown), and various settings can be made by the user.
[0022]
Each combustion unit 10, 20 is supplied with a gas as combustion fuel from a common gas intake 30 through gas pipes 31, 32. An original gas solenoid valve 33 is provided in the vicinity of the gas inlet 30. A gas pipe 31 that leads to the combustion unit 10 for warm water heating is provided with a heating gas supply amount adjustment valve 34 that includes a permanent magnet and a moving coil. A gas pipe 32 that communicates with the combustion unit 20 for general hot water supply is provided with a hot water supply gas supply amount adjustment valve 35 that is also composed of a permanent magnet and a moving coil.
[0023]
In addition, each of the combustion units 10 and 20 is configured to be supplied with water to be heated from a common water supply port 40 through each piping system. The piping system leading to the hot water heating combustion unit 10 includes a plurality of water distribution pipes 42, 43 extending from the water supply tap 41 near the water supply port 40 to the combustion unit 10, and an expansion tank 44 provided between the water distribution pipes 42, 43. And is roughly composed. A makeup water electromagnetic valve 45 is provided between the water distribution pipe 42 and the expansion tank 44. The expansion tank 44 is provided with a tank water level sensor 46 for detecting the water level accumulated inside, and a tank water temperature sensor 46A for detecting the temperature of hot water before being led to the combustion unit 10. A heating pump 47 is provided in the middle of the water distribution pipe 43. On the other hand, the piping system leading to the combustion unit 20 for general hot water supply is roughly configured by a distribution pipe 50 extending from the water supply port 40 to the combustion unit 20 and a bypass pipe 51 branched from the middle of the distribution pipe 50. A flow rate sensor 52 and a incoming water temperature sensor 53 are provided in the middle of the water distribution pipe 50. The bypass pipe 51 is provided with a bypass water amount adjustment valve 54.
[0024]
Furthermore, the combustion unit 10 for warm water heating is configured such that relatively high temperature warm water is supplied through a water conduit 60 to a fan convector (warm air heater) as a warm water heater (not shown). A part of the hot water flowing through the water conduit 60 is configured to be guided to the expansion tank 44 through the bypass pipe 60A. Further, the water distribution pipe 43 is configured such that relatively low-temperature hot water is supplied to the floor heating appliance (not shown) through the thermal valve 48. In fan convectors and floor heaters, heating is performed by the heat radiation effect of hot water. The hot water used in such a hot water heater is returned to the expansion tank 44 and recycled. For example, if the temperature of the hot water flowing through the water conduit 60 and supplied to the hot water heater is 80 ° C., and the temperature of the hot water returning from the hot water heater is 60 ° C., the hot water (80 ℃) and in the expansion tank 44, the water becomes about 65 ° C and is heated again.
[0025]
Here, FIG. 1 schematically shows the entire apparatus so that it can be easily understood as much as possible. However, since the entire apparatus is actually made compact, the heating pump 47 is provided with a heating gas supply amount adjusting valve. 34 and the hot water supply gas supply amount adjustment valve 35 are arranged so as to be very close to each other. For this reason, the heating gas supply amount adjustment valve 34 and the hot water supply gas supply amount adjustment valve 35 are easily affected by the temperature from the heating pump 47, and particularly during the hot water heating operation, the operation is normally continuously performed. The temperature of the adjusting valve 34 and the hot water supply gas supply amount adjusting valve 35 tends to increase.
[0026]
On the other hand, hot water is supplied from the general hot water supply combustion unit 20 to the faucet A through the water conduit 61. A water amount adjustment valve 62 and a tapping temperature sensor 63 are provided in the middle of the water conduit 61. A bypass pipe 51 is connected in the middle of the water conduit 61. During the hot water pouring operation to the bathtub, the hot water solenoid valve (the valve on the left side of the check valve 64 in FIG. 1) is opened, and hot water for hot water supply serves as the check valve 64, the hot water supply pipe 65, and the bath pump. 66 to the heat exchanger 80 for bath.
[0027]
The combustion unit 10 for hot water heating includes a heating burner 11, a heating gas solenoid valve 12, a heating burner sensor 13, a heating spark plug 14, a heating blower fan 15, a fan motor rotation speed sensor (not shown), and a heating heat exchanger 17. Etc. The combustion unit 10 for warm water heating also includes a frame rod (shown between the heating burner sensor 13 and the heating spark plug 14 in FIG. 1) for detecting the ignition state of the heating burner 11. The heating burner 11 burns the gas guided through the gas pipe 31. The heating gas solenoid valve 12 is used for adjusting the supply amount of gas to the heating burner 11 together with the heating gas supply amount adjusting valve 34 on the upstream side thereof, and switching the combustion capacity of the heating burner 11. The heating burner sensor 13 detects the combustion temperature (flame temperature) of the heating burner 11. The heating spark plug 14 is used to ignite the heating burner 11. The heating blower fan 15 is rotated by the driving force of the fan motor to supply and exhaust the air in the combustion chamber. The fan motor rotation speed sensor detects the fan motor rotation speed of the heating / air-blowing fan 15. The fan motor rotation speed sensor is not particularly shown in FIG. 1 because it is constituted by a rotary encoder or the like attached to a rotation shaft of a fan motor (not shown). The heating heat exchanger 17 heats the hot water sent through the water distribution pipe 43 by the combustion heat of the heating burner 11. The heated warm water is sent out through the water conduit 60.
[0028]
The combustion unit 20 for general hot water supply includes a hot water burner 21, a hot water gas solenoid valve 22, a hot water burner sensor 23, a hot water spark plug 24, a hot water blower fan 25, a fan motor rotational speed sensor (not shown), and a hot water heat exchanger 27. Etc. The combustion unit 20 for general hot water supply also includes a frame rod (shown between the hot water burner sensor 23 and the hot water spark plug 24 in FIG. 1) for detecting the ignition state of the hot water burner 21. The hot water supply burner 21 burns the gas guided through the gas pipe 32. The hot water supply solenoid valve 22 is used to adjust the gas supply amount to the hot water supply burner 21 together with the hot water supply gas supply amount adjustment valve 35 on the upstream side thereof, and to switch the combustion capacity of the hot water supply burner 21. The hot water supply burner sensor 23 detects the combustion temperature (flame temperature) of the hot water supply burner 21. The hot water supply spark plug 24 is used to ignite the hot water supply burner 21. The hot water supply fan 25 is rotated by the driving force of the fan motor to supply and exhaust the combustion chamber. The fan motor rotation speed sensor detects the fan motor rotation speed of the hot water supply fan 25. The fan motor rotation speed sensor is not particularly shown in FIG. 1 because it is constituted by a rotary encoder or the like attached to a rotation shaft of a fan motor (not shown). The hot water supply heat exchanger 27 heats the water sent through the water distribution pipe 50 by the combustion heat of the hot water supply burner 21. The heated hot water is sent out through the water conduit 61.
[0029]
As described above, the combustion units 10 and 20 are individually configured, and can be operated independently or simultaneously. Therefore, depending on the installation environment and operating conditions, only the combustion unit 10 for hot water heating may be used, or only the other combustion unit 20 may be used.
[0030]
2 is a circuit block diagram of the combustion apparatus shown in FIG. This combustion apparatus has a microcomputer comprising a CPU 1, a ROM 2, a RAM 3, an I / O 4, and the like connected to each other by a bus. In addition to the original gas solenoid valve 33, the I / O 4 includes a heating gas supply amount adjustment valve 34, a heating gas solenoid valve 12, a heating burner sensor 13, a heating spark plug 14, and a heating blower fan as functional elements belonging to the hot water heating system. 15 fan motors 15A, a fan motor rotation speed sensor 16, a replenishing water electromagnetic valve 45, a tank water temperature sensor 46A, and a heating pump 47 are connected. The I / O 4 includes, as functional elements belonging to the general hot water supply system, a hot water supply gas adjustment valve 35, a hot water supply electromagnetic valve 22, a hot water supply burner sensor 23, a hot water supply spark plug 24, a fan motor 25A of the hot water supply fan 25, The fan motor rotation speed sensor 26, the flow rate sensor 52, the incoming water temperature sensor 53, and the hot water temperature sensor 63 are connected. Furthermore, the I / O 4 is connected with a kitchen remote controller 70 and a bathroom remote controller 71 installed in the kitchen or bathroom as an operation remote controller, and an ambient temperature sensor 81 for detecting the ambient temperature in the apparatus main body. . Note that the circuit shown in FIG. 2 is merely an example and represents only main circuit elements, and in fact, other elements are also connected.
[0031]
The CPU 1 functions as a control center for the entire combustion apparatus, and controls the operation of each unit based on a combustion control program stored in the ROM 2. The ROM 2 stores a combustion control program and various data tables. The RAM 3 provides a working area for the CPU 1.
[0032]
Next, the operation of the combustion apparatus will be described with reference to the drawings.
[0033]
FIG. 3 is a flowchart of the count process executed in association with the hot water heating operation. The count process means that the CPU 1 adds or subtracts a count value by a predetermined amount every second, and the combustion characteristics are switched based on the count value. The count value is integrated and counted in the range of 0 to 9000.
[0034]
As shown in FIG. 3, the CPU 1 checks whether or not it is in the heating operation state (S1). The heating operation state here mainly means hot water heating operation, but when the heating pump 47 is in operation, the heating return temperature detected by the tank water temperature sensor 46A is equal to or higher than a predetermined temperature, and the burner 11 burns. This also includes a state where is stopped (during high cut). The heating operation state includes a bath rebirth operation and a freeze prevention operation. That is, a state in which the temperature characteristic of the heating gas supply amount adjusting valve 34 is affected by the operation of the heating pump 47 is included.
[0035]
When in the heating operation state (S1: YES), the CPU 1 determines whether the heating return temperature detected by the tank water temperature sensor 46A is, for example, 30 ° C. or more (S2).
[0036]
When the heating return temperature is 30 ° C. or higher (S2: YES), the CPU 1 determines whether or not the current count value is less than 3600 (S3).
[0037]
If the count value is less than 3600 (S3: YES), the CPU 1 adds +2 to the current count value (S4), and repeats the counting process again until the count value reaches 9000. That is, when the count value is in the range of 0 to 9000, the counting process is repeated while changing the amount of increase / decrease according to various conditions.
[0038]
On the other hand, if the count value is 3600 or more in S3 (S3: NO), the CPU 1 adds +1 to the current count value (S5), and repeats the count process again until the count value reaches 9000. In short, also in this case, when the count value is in the range of 0 to 9000, the count process is repeated while changing the amount of increase / decrease according to various conditions. When the count value is 3600 or more, the CPU 1 determines that the temperature of the heating gas supply amount adjustment valve 34 has risen to some extent and the gas supply amount has been decreasing accordingly, whereby the following processing is performed. .
[0039]
FIG. 4 is an explanatory diagram for explaining the relationship between the fan motor rotation speed (rpm) of the heating air blower fan 15 and the heating combustion capacity (number) based on the gas supply amount, and FIG. 5 is a gas during actual operation. It is explanatory drawing for demonstrating temporal transition of supply amount.
[0040]
First, with reference to FIG. 4, when the count value is less than 3600, the fan motor rotation speed and the heating combustion capacity (gas supply amount) are controlled so as to follow a thin line. When the count value becomes 3600 or more, the fan motor rotation speed and the heating combustion capacity (gas supply amount) are controlled so as to follow the thick line. In other words, the fan motor rotation speed is corrected negatively, and a portion that should be low capacity is cut in each combustion capacity stage number. In this way, as shown in FIG. 5, the heating gas supply amount adjusting valve 34 is controlled even in a situation where the gas supply amount is gradually decreasing as the temperature of the heating gas supply amount adjusting valve 34 increases. 4 is switched from a thin line to a thick line at a certain point in time, and the heating gas supply amount adjustment valve 34 is controlled to have an appropriate opening degree, so that a continuous appropriate hot water heating operation is performed. Can continue. In short, if the CPU 1 always executes the same combustion control, the actual gas supply amount decreases due to the temperature characteristics of the heating gas supply amount adjustment valve 34, but the combustion control range can be changed as in this embodiment. For example, the output of the CPU 1 is also changed, so that the actual gas supply amount does not fall below a predetermined amount as shown in FIG.
[0041]
Returning to FIG. 3 again, in S2, when the heating return temperature is lower than 30 ° C. (S2: NO), the CPU 1 adds a difference of −1 to the current count value (S6), and the count value is 9000. The counting process is repeated again until. In short, also in this case, when the count value is in the range of 0 to 9000, the counting process is repeated while changing the amount of increase / decrease according to various conditions.
[0042]
Moreover, when it determines with not being in heating operation state in S1, (S1: NO), CPU1 determines whether heating return temperature is less than 30 degreeC, for example (S7).
[0043]
When the heating return temperature is less than 30 ° C. (S7: YES), the CPU 1 adds a difference of −5 to the current count value (S8), and repeats the count process again until the count value reaches 9000. In short, also in this case, when the count value is in the range of 0 to 9000, the counting process is repeated while changing the amount of increase / decrease according to various conditions.
[0044]
On the other hand, when the heating return temperature is 30 ° C. or higher in S7 (S7: NO), the CPU 1 proceeds to S6 and adds a difference of −1 to the current count value.
[0045]
Therefore, according to the above embodiment, even in the heating combustion operation state in which the temperature of the heating gas supply amount adjusting valve 34 is increased, the combustion control range of the burner 11 is set based on the count value as a variable associated therewith. The number of parts that should have a low combustion capacity to be switched is cut, the amount of combustion air is corrected and controlled by correcting the number of rotations of the fan motor of the heating fan 15, and the heating gas supply amount adjustment valve 34 is appropriately adjusted Since correction control is performed at a proper timing, combustion control can be performed with high accuracy while maintaining an appropriate heating operation state.
[0046]
In particular, the combustion control range of the burner 11 is switched if the microcomputer always executes the same combustion control, and the actual gas supply amount decreases due to the temperature characteristics of the heating gas supply amount adjustment valve 34, and as a result. This is because the entire control range is shifted to the gas supply amount lowering side. Therefore, in the combustion control range by the microcomputer, the low capacity region (the heating gas supply amount adjustment valve 34 of each heating capacity supply valve 34) of each combustion capacity stage (a state in which the opening / closing states of the plurality of heating gas solenoid valves 12 are different for each combustion capacity stage). By performing the control in the control range excluding the region where the opening is small, it becomes possible to eliminate combustion in the actual output region that was not expected at the time of design, and avoid problems due to combustion.
[0047]
Also, cutting the number portion that should be low combustion capacity means that when the target number is within the low combustion capacity range to be cut, it shifts to the point on the thick line in FIG. It means performing combustion operation. In the correction control of the heating gas supply amount adjusting valve 34, the microcomputer output based on the normal target combustion capacity is corrected with a predetermined correction amount based on the count value.
[0048]
In the above embodiment, the heating return temperature detected by the tank water temperature sensor 46A is used as a determination criterion, and only one incremental difference pattern is prepared when the count value is added or subtracted. However, as another embodiment, As shown in FIG. 6, the ambient temperature detected by the ambient temperature sensor 81 may be adopted as a control parameter, and the incremental difference pattern of the count value may be changed for each constant range of the ambient temperature.
[0049]
The flowchart shown in FIG. 6 includes almost the same steps as those shown in FIG. 3, but in each of steps S14 to S16 and S18, the count value is added or subtracted within a certain range according to the ambient temperature. According to this, combustion control can be performed with high accuracy while maintaining a more detailed and appropriate heating operation state.
[0050]
The present invention is not limited to the above embodiments.
[0051]
For the control based on the count value, a method of cutting the number portion that should have a low combustion capacity, a correction control of the fan motor rotation speed, and a correction control of the heating gas supply amount adjustment valve 34 at an appropriate timing are simultaneously executed. However, these controls may be executed independently of each other.
[0052]
The above-described control is executed based on the count value, but may be executed simply based on the continuous combustion time after starting the heating combustion operation. In such a case, for example, the opening degree of the heating gas supply amount adjusting valve 34 is determined by adding a correction amount based on the continuous combustion time to the microcomputer output based on the normal target combustion capacity. When measuring the continuous combustion time, various design changes such as initializing the time during non-combustion or subtracting time during non-combustion are possible. In addition to the continuous combustion time, a correction amount based on the ambient temperature in the appliance may be added.
[0053]
In addition, by cutting the low combustion capacity range of each combustion capacity stage number, the number area lap where each combustion capacity stage number is switched (in FIG. 4, the number area in the first stage and the second stage of the thin line). Even if there is a lap portion, but there is no lap portion in the number area between the first stage and the second stage of the thick line), even if the number of combustion capacity stages is switched, A temperature condition may be imposed when switching the number of combustion capacity stages so as not to hunt between the second stage. Here, to impose a temperature condition, specifically, when the current target combustion capacity (target number) is changed to change to the number of combustion capacity stages one stage higher or lower, the actual condition is actually changed. It means that a deviation between the set temperature and the detected temperature is used as a condition for determining whether to perform the switching operation. The set temperature means a target temperature of hot water at a predetermined position in the circulating hot water path.
[0054]
The present invention is not limited to a combustion apparatus incorporating two types of combustion units for hot water heating and general hot water supply, but may be applied to a combustion apparatus having only a single hot water heating function or a general hot water supply single function.
[0055]
【The invention's effect】
As described above, according to the present invention, for example, even in an operating state in which the temperature of the supply amount adjustment valve rises, the burner combustion control range is switched based on the variable and combustion time associated therewith, Since the combustion air amount is corrected and controlled, or the supply amount adjustment valve is directly corrected, combustion control can be performed with high accuracy while maintaining an appropriate combustion state.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a combustion apparatus according to an embodiment of the present invention.
FIG. 2 is a circuit block diagram of the combustion apparatus shown in FIG.
FIG. 3 is a flowchart of a count process executed in association with a hot water heating operation.
FIG. 4 is an explanatory diagram for explaining a relationship between a fan motor rotation speed (rpm) of a heating air blowing fan and a heating combustion capacity (number) based on a gas supply amount.
FIG. 5 is an explanatory diagram for explaining a temporal transition of a gas supply amount during actual operation.
FIG. 6 is a flowchart of count processing according to another embodiment.
[Explanation of symbols]
1 CPU
2 ROM
3 RAM
4 I / O
10 Combustion unit for hot water heating
11 Heating burner
12 Heating gas solenoid valve
13 Heating burner sensor
14 Heating spark plug
15 Heating fan
16 Fan motor speed sensor
20 Combustion unit for general hot water supply
21 Hot water burner
22 Hot water gas solenoid valve
23 Hot water burner sensor
24 Hot water spark plug
25 Hot water supply fan
26 Fan motor speed sensor
34 Heating gas supply adjustment valve
35 Hot water supply gas adjustment valve
44 Expansion tank
46A Tank water temperature sensor
47 Heating pump

Claims (12)

A combustion apparatus having a function of supplying hot water while heating with a burner whose fuel supply amount is adjusted via a supply amount adjustment valve,
Hot water temperature detecting means for detecting the temperature of hot water affecting the temperature of the supply amount adjusting valve;
Based on the temperature detected by the hot water temperature detection means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for switching the combustion control range of the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion device having a function of supplying hot water with heating by a burner,
Pre-heating temperature detecting means for detecting the temperature of hot water before being heated by the burner;
Based on the temperature detected by the pre-heating temperature detection means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for switching the combustion control range of the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion apparatus having a function of supplying hot water while heating with a burner whose fuel supply amount is adjusted via a supply amount adjustment valve,
Hot water temperature detecting means for detecting the temperature of hot water affecting the temperature of the supply amount adjusting valve;
An atmospheric temperature detecting means for detecting an atmospheric temperature in the apparatus body;
Based on both the detected temperature by the hot water temperature detecting means and the ambient temperature detecting means and the hot water supply operation state, a counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for switching the combustion control range of the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion device having a function of supplying hot water with heating by a burner,
Pre-heating temperature detecting means for detecting the temperature of hot water before being heated by the burner;
An atmospheric temperature detecting means for detecting an atmospheric temperature in the apparatus body;
Based on both the detected temperature by the pre-heating temperature detecting means and the ambient temperature detecting means and the hot water supply operation state, a counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for switching the combustion control range of the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion apparatus having a function of supplying hot water while heating with a burner whose fuel supply amount is adjusted via a supply amount adjustment valve,
Hot water temperature detecting means for detecting the temperature of hot water affecting the temperature of the supply amount adjusting valve;
Based on the temperature detected by the hot water temperature detection means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion device having a function of supplying hot water with heating by a burner,
Pre-heating temperature detecting means for detecting the temperature of hot water before being heated by the burner;
Based on the temperature detected by the pre-heating temperature detection means and the hot water supply operation state, the counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion apparatus having a function of supplying hot water while heating with a burner whose fuel supply amount is adjusted via a supply amount adjustment valve,
Hot water temperature detecting means for detecting the temperature of hot water affecting the temperature of the supply amount adjusting valve;
An atmospheric temperature detecting means for detecting an atmospheric temperature in the apparatus body;
Based on both the detected temperature by the hot water temperature detecting means and the ambient temperature detecting means and the hot water supply operation state, a counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion device having a function of supplying hot water with heating by a burner,
Pre-heating temperature detecting means for detecting the temperature of hot water before being heated by the burner;
An atmospheric temperature detecting means for detecting an atmospheric temperature in the apparatus body;
Based on both the detected temperature by the pre-heating temperature detecting means and the ambient temperature detecting means and the hot water supply operation state, a counting means for obtaining a variable while adding or subtracting a predetermined amount at every predetermined timing;
Combustion control means for correcting and controlling the amount of combustion air for the burner based on the variable obtained by the counting means;
A combustion apparatus comprising: A combustion apparatus having a supply amount adjustment valve for adjusting a fuel supply amount,
A timing means for timing the combustion time;
Correction control means for correcting and controlling the supply amount adjusting valve based on the time measured by the time measuring means;
A combustion apparatus comprising: The combustion apparatus according to claim 9, wherein the time measuring means initializes a time measurement amount at the time of non-combustion. The combustion apparatus according to claim 9, wherein the time measuring means subtracts a time measurement amount during non-combustion. An atmosphere temperature detecting means for detecting an atmosphere temperature in the apparatus main body is provided, and the correction control means corrects and controls the supply amount adjusting valve based on a temperature detected by the atmosphere temperature detecting means and a time measured by the time measuring means 12. A combustion apparatus according to any one of claims 9 to 11.

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