JP6226181B2 - Combustion device and hot water device provided with the same - Google Patents

Description

  The present invention relates to a combustion apparatus suitable for use as a component of a hot water apparatus such as an instantaneous hot water supply apparatus, and a hot water apparatus including the combustion apparatus.

An example of the combustion apparatus is disclosed in Patent Document 1.
The combustion apparatus described in this document accommodates a plurality of burners side by side in one burner case, and the combustion air is supplied into the burner case from below using a fan. A rectifying plate is provided below the plurality of burners, and the combustion air discharged from the fan is introduced into each burner by a guide action by the rectifying plate and mixed with the fuel gas. Burn. On the other hand, the plurality of burners are divided into a plurality of partially combustible regions where the fuel gas supply can be individually switched on and off, and any one of the plurality of partially combustible regions is independently used. It is possible to adjust the combustion thermal power by driving the combustion or combining and driving a plurality of partially combustible regions.

  When the above-described combustion apparatus is used as a component of a large hot water supply apparatus for restaurants, for example, in addition to increasing the number of burners, it is necessary to increase the amount of combustion air supplied into the burner case. There is. In such a case, if a large fan is simply used as the fan, the cost becomes considerably high. Moreover, since a fan is large and bulky, there also exists a disadvantage which causes the enlargement of the whole hot water apparatus.

  As a means for avoiding such disadvantages, for example, it is conceivable to use two fans (see, for example, Patent Document 2). According to such means, since each fan can be small, compared with the case where one large fan is used, the total cost can be reduced and the entire apparatus can be downsized. It is also possible to plan.

  However, when only two fans are used, when the burner is in a combustion drive state, in particular, when partial burn drive is generated in the burner, supply of combustion air suitable for partial combustion is not performed, which may cause problems. As a specific example, when the burner is performing partial combustion drive and the supply amount of combustion air to the non-combustion portion is excessive, this combustion air is installed on the upper side of the combustion device. The heat exchanger will be cooled, and the heat exchange efficiency of the heat exchanger may be reduced. On the other hand, if the supply amount of combustion air to the non-combustion part is too small, the combustion gas may flow back into the burner of the non-combustion part due to the furnace pressure in the combustion space. In addition, vibration combustion may occur at the start of burner combustion drive.

JP 2003-262333 A JP-A-8-75127

  The present invention has been conceived under the circumstances described above. When two fans are used as means for supplying combustion air and a plurality of burners are driven to perform partial combustion, An object of the present invention is to provide a combustion apparatus capable of setting the combustion drive state to an appropriate state, and a hot water apparatus provided with the combustion apparatus.

  In order to solve the above problems, the present invention takes the following technical means.

A combustion apparatus provided by the first aspect of the present invention includes a plurality of partially combustible regions that are accommodated in one burner case, arranged in a substantially horizontal direction , and can be individually switched on and off of fuel supply. A plurality of burners, a first and a second fan for supplying combustion air into the burner case from the lower side thereof, and a supply of combustion air from these first and second fans An air supply chamber for receiving the air is formed on the lower side of the plurality of burners, and the combustion air supplied to the air supply chamber is prevented from rising in the burner case as it is in the plurality of burners. and a, a rectifying plate for guiding the combustion air to be introduced, a combustion apparatus, immediately below the boundary of the partial combustion region each other in the plurality of burners, the air A partition member for partitioning the supply chamber into first and second air supply chambers is further provided, and combustion air discharged from the first fan passes through the first air supply chamber and is located above Combustion air supplied to the first region burner and discharged from the second fan is supplied to the second region burner above the second air supply chamber via the second air supply chamber. The second fan discharges less air than the first fan in a state where the burner in the first region is driven to burn and the burner in the second region is not driven to burn. While the amount of combustion air is supplied to the second air supply chamber in an amount, the first region is burned from the first region burner to the second region burner. Air discharge amount of the fan, and the first The fuel supply pressure to the burner in the area is not changed, and the air discharge amount of the second fan is made lower than the air discharge amount of the first fan and increased from the previous air discharge amount. It is characterized by being composed .

According to such a configuration, the following effects can be obtained.
First, combustion air is supplied from the first fan to the burner in the first region, while combustion air is supplied from the second fan to the burner in the second region. Therefore, for example, even when only the burner in the first region is driven to burn and the burner in the second region is in a non-combustion drive state, the burner in the first region and the burner in the second region are Combustion air supply appropriately corresponding to each state can be performed individually. As a result, for example, when the burner in the first region is driven to burn, the amount of combustion air supplied to the second region, which is a non-combustion portion, can be suppressed, and a large amount of combustion supplied to the second region It is possible to suppress the problem that the working air cools the heat exchanger installed on the upper side of the combustion device. In addition, the supply of combustion air to the non-combustion part is eliminated, and it is possible to prevent problems such as the combustion gas flowing back into the burner of the non-combustion part due to the furnace pressure in the combustion space. Become. Furthermore, at the start of burner combustion drive (ignition), it is possible to prevent vibration combustion by making a difference in the amount of combustion air supplied to the first region and the second region to disrupt the flame balance. It becomes.
In the present invention, since the partition member is provided at a position corresponding to the boundary portion between the partial burnable regions of the plurality of burners, both the first region and the second region are used as the partial burnable regions of the burner. There will be no thing that straddles. As a result, when the burner is driven by partial combustion, the combustion region is prevented from straddling both the first region and the second region, and each of the first region and the second region is controlled. Appropriate supply of combustion air can be performed more accurately.
Furthermore, according to the said structure, it prevents that the air supply amount to a 1st area | region becomes excessive compared with the air supply amount to a 2nd area | region, and the combustion flame of the burner of a 1st area | region becomes a 2nd area | region. It is more preferable to accurately destabilize and deviate to the side.
Further, according to the above-described configuration, when performing the fire transfer from the burner in the first region to the burner in the second region, the fuel supply pressure to the burner in the first region is temporarily reduced to temporarily reduce the combustion thermal power. An operation of weakening (generally, an operation of temporarily lowering the fuel supply pressure at the time of transfer) is unnecessary. Therefore, the return to the steady combustion state can be shortened by smoothly and promptly transferring the fire to the second region.

  In the present invention, preferably, the burner in the first region has a larger number of partial combustible regions than the burner in the second region, and when the plurality of burners cause partial combustion, The burner in the first region is used preferentially over the burner in the second region, and when all the burners in the first region are not in the combustion drive state, the burner in the second region is configured not to be driven by combustion. ing.

  According to such a configuration, when the burner thermal power is gradually increased by increasing the region where the partial combustion drive of the burner is performed, or on the contrary, when the burner thermal power is gradually decreased. The burner in the first region is maintained as the combustion drive region. It is possible to prevent frequent occurrence of the first region and the second region being alternately switched to the combustion drive state or the non-combustion drive state of the burner. For this reason, it is possible to eliminate or reduce the amount of combustion air supplied from the first and second fans to the first region and the second region rapidly and frequently. This contributes to facilitating control of the first and second fans, and is also preferable for stabilizing the combustion drive state of the burner.

  In the present invention, preferably, at the time of ignition for starting the combustion drive of the plurality of burners, the amount of air discharged from the first and second fans is made non-uniform.

  According to such a configuration, it is possible to intentionally break the balance of the flame generated when the burner is ignited between the first region side and the second region side. By this action, an effect of suppressing the occurrence of vibration combustion at the early stage of combustion driving of the burner can be obtained.

  In this invention, Preferably, the said partition member is extended to the position higher than the said baffle plate so that between the burner of the said 1st area | region and the burner of the said 2nd area | region, and this partition member The upper end of is set to a height lower than the flame hole portion of the upper surface portion of the plurality of burners.

  According to such a configuration, since the burner in the first region and the burner in the second region are partly partitioned by the partition member, the combustion air supplied to one of the first region and the second region is It is difficult to proceed to the other side, which is preferable for stabilizing the combustion operation. On the other hand, if the upper end of the partition member has a height lower than the flame hole portion of the upper surface portion of the burner, the partition member can be prevented from being exposed to the flame, and thermal damage to the partition member can be prevented.

  The hot water device provided by the second aspect of the present invention includes a combustion device and a heat exchanger for performing heat recovery from the combustion gas generated by the combustion device to perform hot water heating. A hot water apparatus, wherein the combustion apparatus provided by the first aspect of the present invention is used as the combustion apparatus.

  According to such a configuration, the same effect as described for the combustion device provided by the first aspect of the present invention can be obtained.

  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.

It is principal part sectional drawing which shows an example of the hot water apparatus provided with the combustion apparatus which concerns on this invention. It is II-II sectional drawing of FIG. It is principal part sectional drawing which shows contrast with this invention. It is a flowchart which shows an example of the operation | movement process in the combustion apparatus shown in FIG. It is a flowchart which shows the other example of the operation process in the combustion apparatus shown in FIG. It is explanatory drawing which shows an example of the method of switching of the combustion thermal power in the combustion apparatus shown in FIG. (A) is principal part sectional drawing which shows the other example of this invention, (b) is explanatory drawing which shows an example of how to switch the combustion thermal power in the combustion apparatus shown to (a). (A) is principal part sectional drawing which shows the other example of this invention, (b) is explanatory drawing which shows an example of how to switch the combustion thermal power in the combustion apparatus shown to (a).

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The hot water device WH shown in FIG. 1 is an instantaneous gas hot water supply device, and includes a combustion device C1 and a heat exchanger 1.

  The combustion device C1 includes a plurality of burners (combustion pipes) 2, a burner case 3 that accommodates them, first and second fans 4a and 4b for supplying combustion air into the burner case 3, a rectifying plate 5, A partition member 6 and a header 7 for fuel gas ejection (see FIG. 2) are provided.

The plurality of burners 2 are gas burners, and are arranged at a predetermined arrangement pitch in the horizontal width direction of the burner case 3. As each burner 2, it is possible to use the same one as in the past and the details thereof are omitted, but the whole is relatively flat and has a fuel gas inlet 20 at the lower part of one end in the longitudinal direction. In addition, the upper surface portion has a flame hole portion 21 having an elongated rectangular shape in plan view. The fuel gas introduction port 20 is provided so as to face the outside from the front wall portion of the burner case 3, and is discharged from one of the first and second fans 4a and 4b to the fuel gas introduction port 20. A part of the combustion air (primary air) is supplied. The fuel gas ejection header 7 can eject the fuel gas to the fuel gas inlet 20. The burner 2 is supplied with a mixture of primary air and fuel gas, and burns in the flame hole 21.

  The plurality of burners 2 are divided into partially combustible areas a to e. These partially combustible areas a to e can be individually switched on / off by the fuel gas supply from the fuel gas jetting header 7 to each of these partially combustible areas a to e. It is possible to drive by combustion. In the present embodiment, the number of burners 2 in the partially combustible areas a to e is 6, 3, 2, 8, and 3, respectively.

  The first and second fans 4 a and 4 b are attached to the lower part of the burner case 3, and combustion air can be supplied upward into the burner case 3 through the opening 30 at the lower part of the burner case 3. . The first and second fans 4a and 4b and the drive motors Ma and Mb have substantially the same structure and size.

  The rectifying plate 5 is arranged below the plurality of burners 2 and suppresses the combustion air discharged from the first and second fans 4a and 4b from rising as it is, and most of the rectifying plate 5 is The primary air is led to the fuel gas inlet 20 of each burner 2. The rectifying plate 5 is provided with a plurality of vent holes 50, and a part of the combustion air that has passed through the vent holes 50 is used as secondary air for combustion drive of each burner 2.

  The partition member 6 converts the air supply chamber 32 formed between the rectifying plate 5 and the bottom plate portion 31 of the burner case 3 into first and second air supply chambers 32 a and 32 b in the lateral width direction of the burner case 3. For partitioning, for example, a metal plate such as a plated steel plate or a stainless steel plate. The first and second fans 4a and 4b are provided so as to individually send combustion air into the first and second air supply chambers 32a and 32b, respectively. The partition member 6 extends further to the upper side than the air supply chamber 32, and enters the position in the gap between the burners 2. The upper end height of the partition member 6 is slightly lower than the flame hole portion 21 of the burner 2. This prevents the partition member 6 from being exposed to the flame of the burner 2 and makes it difficult to cause thermal damage. This can provide an advantage that a low-cost metal material with low heat resistance can be selected as the partition member 6. In addition, unlike the present embodiment, when the partition member 6 is extended to a height higher than the flame hole portion 21, it is necessary to flow a lot of secondary air along the partition member 6 for cooling the partition member 6. There is concern about adverse effects on thermal efficiency. On the other hand, according to this embodiment, such a thing is also eliminated.

  The partition member 6 is provided at a position that partitions between the partially combustible regions c and d of the plurality of burners 2. As a result, the number of burners 2 located in the first area A1 above the first air supply chamber 32a and the number of burners 2 located in the second area A2 above the second air supply chamber 32b are as follows. , Both are the same number. The volumes of the first and second air supply chambers 32a and 32b are also substantially the same.

  The driving of the first and second fans 4a, 4b, the on / off switching of the fuel gas ejection from the fuel gas ejection header 7, the ignition operation to the burner 2, the change of the combustion thermal power of the burner 2, etc. It is configured to be controlled by a controller (not shown). Specific contents of this control will be described later.

The heat exchanger 1 performs heat recovery from the combustion gas generated by the combustion device C1 and performs hot water heating. The can body 10 mounted on the upper side of the burner case 3 and the inside of the can body 10 And a heat transfer tube 12 with a large number of fins 11 accommodated therein. The heat transfer pipe 12 is provided with a water inlet 13 for allowing hot water to be heated to flow in, and a hot water outlet 14 for allowing hot water that has passed through the heat transfer pipe 12 to flow out. The water inlet 13 is provided on the side (the left side in FIG. 1) where the first region A1 is located in the horizontal width direction of the burner case 3. Although illustration explanation is omitted, it is also possible to adopt a configuration in which a heat exchanger for recovering latent heat is further provided as a heat exchanger for heating hot water separately from the heat exchanger 1.

  Next, the operation of the hot water device WH will be described.

  First, combustion air is supplied from the first fan 4a to the burner 2 in the first region A1, and combustion air is supplied from the second fan 4b to the burner 2 in the second region A2. Therefore, for example, as shown in FIG. 1, when only the burner 2 in the first region A1 is driven to burn and the burner 2 in the second region A2 is in a non-combustion drive state, the first region A1 The burner 2 is supplied with combustion air in an amount suitable for combustion drive from the first fan 4a, and the burner 2 in the second region A2 is not supplied with excessive combustion air. Can do. If the amount of combustion air supplied to the burner 2 in the second region A2 is large, a large amount of combustion air that has passed through the second region A2 cools the heat exchanger 1 and the heat exchange efficiency of the hot water device WH deteriorates. Such a problem can be avoided. On the other hand, if the combustion air supply to the burner 2 in the second region A2 is completely stopped, the combustion gas flows back into the burner 2 in the second region A2, which is a non-combustion part, due to the furnace pressure in the combustion space. Although there is a possibility, according to the present embodiment, such a possibility can be appropriately prevented by rotating the second fan 4b at a low speed.

The partition member 6 is provided at a position corresponding to a boundary portion of the partial burnable regions c and d in the plurality of burners 2, and the partial burnable regions a to e of the burner 2 are the first region A1 and the second region. None exists across both the area A2.
For example, when the partially combustible region y extends over both the first region A1 and the second region A2 as shown in FIG. 3, the partial combustible region y is driven to burn. In this case, a combustion portion and a non-combustion portion are generated in each of the first region A1 and the second region A2. This increases the amount of useless combustion air in both the first region A1 and the second region A2, and the heat exchanger 1 is easily cooled. According to the present embodiment, such a situation can be appropriately avoided.

  The effect as described above is that the partition member 6 is not only the boundary portion between the partially combustible regions c and d, but also the boundary portion between the other partially combustible regions (for example, the boundary portion between the partially combustable regions b and c). Etc.) can also be obtained. In the present embodiment, by providing the partition member 6 at a position corresponding to the boundary portion between the partially combustible regions c and d, the number of burners in the first region A1 and the second region A2 are made uniform. For this reason, as the first and second fans 4a and 4b and their driving motors Ma and Mb, those having the same structure and size can be suitably used. If these devices are shared, the cost can be reduced, and the control system for the drive motors Ma and Mb is also shared, so that fan control can be facilitated.

  Next, a specific example of operation processing performed in the combustion apparatus C1 will be described.

[Ignition operation]
When the burner 2 is ignited, a combustion vibration preventing operation as shown in FIG. 4 is executed.
That is, when the burner 2 is ignited, the first and second fans 4a and 4b are driven, but the fan rotational speeds of the two are different, and the first and second fans 4a and 4b are driven. The amount of combustion air discharged from 4b is made uneven (S1: YES, S2). When the ignition operation using the spark plug (not shown) is completed, the first and second fans 4a and 4b are thereafter controlled to a predetermined rotational speed adapted to the combustion drive of the burner 2 (S3, S4: YES) , S5).

According to the operation described above, the balance of the flame generated when the burner 2 is ignited can be positively disrupted by the non-uniformity in the discharge amount of the combustion air. This makes it possible to appropriately suppress the combustion vibration that is likely to occur in the early stage of combustion drive.

[Fire transfer]
As shown in FIG. 1, when the burner 2 in the first region A1 is driven to burn and the burner 2 in the second region A2 is in a non-combustion drive state, the burner 2 in the second region A2 is caused to burn. In such a case, control as shown in FIG. 5 is performed.
First, the state shown in FIG. 1 is the state of YES and S11 in step S10 of FIG. 5, the first fan 4a is set to a rotational speed corresponding to the combustion drive of the burner 2, and the second fan 4b is It is slower than that. The reason why the second fan 4b rotates at a low speed is to prevent a large amount of combustion air from flowing from the first region A1 to the second region A2 as described above.

  In such a state, in order to cause a fire transfer to the burner 2 in the second region A2, the rotational speed of the first fan 4a and the supply pressure of the fuel gas to the burner 2 in the first region A1 are changed. Without any change, the rotational speed of the second fan 4b is slightly increased (S12: YES, S13). The rotation speed of the second fan 4b is in a range not exceeding the rotation speed of the first fan 4a. With the change in the fan speed, fuel gas supply to the burner 2 in the second region A2 is started (S14). When the fire transfer is completed by such an operation, the rotational speed of the second fan 4b is further increased to correspond to the combustion drive of the burner 2 in the second region A2 (S15: YES, S16). About the air discharge amount of the 1st fan 4a with respect to 1st area | region A1 after the completion of a fire transfer, you may change according to the combustion capability requested | required, such as reducing.

  According to such control, the fire transfer operation can be performed quickly. In a conventional general combustion apparatus, when performing a fire transfer, an operation of temporarily lowering the supply pressure of the fuel gas to the burner that is driven to perform combustion is performed. It takes some time to restore the burner to its original combustion state. On the other hand, according to the present embodiment, the combustion drive state of the burner 2 in the first region A1 is not greatly changed, and the return to the steady combustion state is quickly performed. This is a great advantage in stabilizing the temperature of the hot water from the hot water device WH.

(Combustion firepower switching)
Switching of the combustion thermal power of the plurality of burners 2 is performed in a manner as shown in FIG. 6, for example. In the figure, the portion with cross-hatching is a combustion region, and the portion without cross-hatching is a non-combustion region (the same applies to FIGS. 7B and 8B described later). .
As shown in FIG. 6, in the combustion apparatus C <b> 1, six stages of combustion thermal power adjustments of fuel thermal powers 1 to 6 are possible by combining the partial combustion possible areas a to e into the combustion area. At the time of adjusting the combustion thermal power, the burner 2 in the first region A1 is preferentially used, and when all the burners 2 in the first region A1 are not in the combustion drive state, the burner in the second region A2 is driven by combustion. Instead, the burner 2 in the second region A2 is driven to burn only when all the burners 2 in the first region A1 are in the combustion drive state, as in the case of the combustion thermal powers 5 and 6. .

According to such a configuration, it is possible to maintain the burner 2 in the first region A1 in the combustion drive state and the burner 2 in the second region A2 in the non-combustion drive state as much as possible, thereby stabilizing the drive combustion state of the burner 2. Can be made. Further, it is possible to avoid as much as possible that a large amount of combustion air is supplied to the non-combustion region.
FIG. 7 is proportional to this embodiment. However, the combustion apparatus C2 shown in the figure is also included in the technical scope of the present invention. In the combustion apparatus C2 of FIG. 7, when the combustion thermal power 4 is set and the partial combustion possible regions b to d are set as the combustion regions, this combustion region extends over both the first region A1 and the second region A2. Thus, a non-combustion region is generated on both sides of the combustion region. With this, the amount of combustion air supplied to the non-combustion region increases, and the heat exchanger 1 is easily cooled. On the other hand, according to this embodiment, there is no such fear.

  Furthermore, in this embodiment, as described above, the burner 2 in the first region A1 is preferentially used during partial combustion of the plurality of burners 2, and the water inlet 13 of the heat exchanger 1 is in the first region. As a result of being located closer to A1, an effect of narrowing a region where condensed water is generated in the heat exchanger 1 is also obtained. More specifically, a relatively low temperature hot water is supplied to the water inlet 13 of the heat exchanger 1, and when the combustion gas is cooled by this hot water, the water vapor in the combustion gas is condensed and strongly acidic condensate. Is generated on the surface of the heat exchanger 1. The condensed water causes corrosion of the heat exchanger 1 and reduces the heat exchange efficiency of the heat exchanger 1. The location where the condensed water is generated is generated in a portion where hot water entering the heat exchanger 1 first encounters the combustion gas generated by the burner 2 and in the vicinity thereof (for example, a portion n1 in FIG. 1).

  According to the present embodiment, the place where the condensed water as described above is generated is limited to above the first region A1. Therefore, generation | occurrence | production of condensed water in the wide range of the heat exchanger 1 can be avoided appropriately, and the corrosion of the heat exchanger 1 resulting from generation | occurrence | production of condensed water and the fall of heat exchange efficiency can be suppressed. Such advantages can also be obtained in the comparative example shown in FIG.

  FIG. 8 shows another embodiment of the present invention. In the figure, the same or similar elements as those in the above embodiment are given the same reference numerals as in the above embodiment.

  In the combustion apparatus C3 shown in FIG. 8, the total number of burners 2 is the same as that in the above embodiment, but the number of burners 2 constituting each of the partial combustion possible regions a to e is different from that in the above embodiment. ing. Moreover, the partition member 6 is not provided so that the number of each burner 2 of 1st area | region A1 and 2nd area | region A2 may become the same number, and the direction of 1st area | region A1 is more than 2nd area | region A2. The number of burners 2 is provided to be small. When the combustion thermal power of the burner 2 is switched in a plurality of stages, the mode shown in FIG. In the present embodiment, when the plurality of burners 2 are partially burned, the burner 2 in the first region A1 is preferentially used, and the burner 2 in the second region A2 is driven by combustion, 6 and is limited to the case where all of the burners 2 in the first region A1 are in the combustion drive state. Therefore, the disadvantages described with reference to FIG. 7 can be eliminated. Moreover, according to this embodiment, condensed water will generate | occur | produce in the heat exchanger 1 in the position above the partial combustion possible area | regions a and b, and the range which condensed water generate | occur | produces can be narrowed rather than the case of the said embodiment. Benefits that can be obtained.

  In the embodiment shown in FIG. 8, the first and second fans 4a and 4b and their drive motors Ma and Mb have the same structure and size. However, as a matter of course, instead of such a configuration, the first fan 4a and the motor Ma may be smaller in size (or lower rated capacity) than the second fan 4b and the motor Mb.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the combustion apparatus and the hot water apparatus according to the present invention can be variously modified within the range intended by the present invention.

The partition member referred to in the present invention may be a member that partitions the air supply chamber into the first and second air supply chambers, and may be provided so as not to protrude upward from the rectifying plate. The position where the partition member is provided may be a position corresponding to a boundary portion between the partially combustible regions (if there are a plurality of boundary portions, any one of them may be the boundary portion). The difference between the size of the air supply chamber and the difference between the number of burners in the first region and the number of burners in the second region may be relatively large. The specific types of the first and second fans and their driving motors are not limited. It is sufficient that at least two fans are provided, and even when three or more fans are provided, a configuration related to two fans (first and second fans) is intended by the present invention. If it falls under the configuration, it is included in the technical scope of the present invention.

  The combustion apparatus according to the present invention can also be used for applications other than components of a hot water apparatus such as a hot water supply apparatus (for example, a combustion apparatus for heating or incineration). Further, the combustion apparatus according to the present invention is suitable to be configured as a large-sized apparatus for restaurants and the like, but the specific size and the like are not limited, and can be configured as a relatively small-sized combustion apparatus. . In the hot water apparatus according to the present invention, the specific configuration of the heat exchanger is not particularly limited, and various types of heat exchangers capable of hot water heating can be used.

C1 to C3 Combustion device WH Hot water device A1 First region A2 Second region a to e Burner partial combustible region 1 Heat exchanger 2 Burner 3 Burner cases 4a and 4b First and second fans 5 Current plate 6 Partition member 32 (32a, 32b) Air supply chamber (first and second air supply chambers)

Claims (5)

A plurality of burners housed in a single burner case and arranged in a substantially horizontal direction and divided into a plurality of partially combustible regions capable of individually switching on and off of fuel supply ;
First and second fans for supplying combustion air into the burner case from the lower side;
An air supply chamber that receives the supply of combustion air from the first and second fans is defined below the plurality of burners, and the combustion air supplied to the air supply chamber passes through the burner case. A rectifying plate that guides the combustion air to be introduced into the plurality of burners while suppressing ascending as it is,
And a, a combustion apparatus,
A partition member that partitions the air supply chamber into first and second air supply chambers immediately below the boundary portion between the partially combustible regions in the plurality of burners,
Combustion air discharged from the first fan is supplied to the burner in the first region above the first air supply chamber via the first air supply chamber, and is discharged from the second fan. Is configured to be supplied to the burner in the second region above it via the second air supply chamber ,
In a state in which the burner in the first region is driven to burn and the burner in the second region is not driven to burn, the second fan has a smaller air discharge amount than the first fan. While the combustion air is supplied to the air supply chamber, the air discharge of the first fan is performed while the burner is transferred from the burner in the first region to the burner in the second region. The air discharge amount up to that time without changing the amount and the fuel supply pressure to the burner in the first region while keeping the air discharge amount of the second fan lower than the air discharge amount of the first fan Combustion device, characterized in that it is configured to increase . The combustion device according to claim 1,
The burner in the first region has a larger number of sections of the partially combustible region than the burner in the second region,
When partial combustion is caused in the plurality of burners, the burners in the first region are used preferentially over the burners in the second region, and all of the burners in the first region are not in a combustion drive state. A combustion apparatus configured such that the burner in the second region is not driven to burn. The combustion apparatus according to claim 1 or 2 ,
A combustion apparatus configured to make the air discharge amounts from the first and second fans non-uniform during ignition for starting combustion drive of the plurality of burners . A combustion apparatus according to any one of claims 1 to 3,
The partition member extends to a position higher than the rectifying plate so as to partition between the burner of the first region and the burner of the second region, and the upper end of the partition member is A combustion apparatus that is set at a height lower than the flame hole on the upper surface of the burner . A combustion device;
A heat exchanger for performing heat recovery from the combustion gas generated by the combustion device to perform hot water heating,
A hot water device comprising:
A hot water apparatus, wherein the combustion apparatus according to any one of claims 1 to 4 is used as the combustion apparatus.

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