JPH11166718A - Ventilation equalizing device for combustion machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the adverse influence of the flow velocity variation to provide a hardly varying detected value from an air flow rate sensor. SOLUTION: A linear equalizing passage 32 for incorporating an air flow rate sensor 16 is formed in the machine case 28 at the back of a partition 30, the inlet and outlet of this passage 32 are located at positions diagonal to the case 28 and communicated with a space in front of the partition 30 through communicating holes 35a, 35b. The passage 32 may be extended to eliminate the flow velocity variation of the air entering from the hole 35a before reaching the flow rate sensor 16. Thus the sensor 16 provides a detected value without the variation due to the air flow velocity variation to thereby accurately detect the air flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation rectifier provided in a combustion device such as a water heater or a bath kettle for rectifying air guided to an air volume detection sensor for detecting an air volume of combustion air.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a system configuration of a water heater (apparatus) which is a combustion device under development by the applicant. In the figure, an appliance body 2 is accommodated in an appliance case 1, a combustion chamber 3 is provided inside the appliance body 2, and a burner 4 is installed below the combustion chamber 3. A gas nozzle 7 attached to a nozzle header 6 is opposed to the gas introduction section 5 of the burner 4, and a gas supply passage 8 is connected to the nozzle header 6. The gas supply passage 8 includes an electromagnetic valve 10 for supplying and shutting off gas to the nozzle header 6, a proportional valve 11 for controlling the supply amount of gas to the burner 4 by a valve opening amount, and opening and closing of the gas supply passage 8. And an original electromagnetic valve 12 for performing the above operation. The burner 4
A combustion fan 13 for supplying and exhausting burner combustion
Is provided, and an air chamber 14 is formed between the combustion fan 13 and the burner 4.

[0003] Between the air chamber 14 and the combustion chamber 3, there is provided an air distribution passage 15 for taking in and flowing a part of the combustion air supplied from the combustion fan 13 to the burner 4. An airflow detection sensor 16 that detects the airflow of the combustion air supplied from the combustion fan 13 to the burner 4 is provided in the branch passage 15. The air volume detection sensor 16 is constituted by an appropriate sensor having a function of directly or indirectly detecting the air volume, such as a hot-wire heater type wind speed sensor or a differential pressure sensor.

[0004] Above the combustion chamber 3 is a hot water supply heat exchanger 1
A water supply passage 18 is connected to the inlet side of the hot water supply heat exchanger 17. The water supply passage 18 has a water amount sensor 20 for detecting a water supply flow rate and a water supply temperature sensor 21 for detecting a water supply temperature. Is provided. A hot water supply passage 22 is connected to the outlet side of the hot water supply heat exchanger 17, and the hot water supply passage 22 is provided with a hot water supply temperature sensor 23 for detecting a hot water supply temperature and a water amount control valve 24 for controlling a hot water supply flow rate.

The operation of the water heater is controlled by a controller 25, to which a remote controller 26 for setting operating conditions such as hot water temperature is connected by signal.

[0006] The control device 25 controls the gas supply amount by the opening amount of the proportional valve 11 so that the hot water supply temperature becomes the hot water supply set temperature set by the remote controller 26, and also controls a predetermined appropriate air-fuel ratio. The rotation of the combustion fan 13 is controlled so as to be as follows. The control of the air volume of the combustion air will be described in more detail. The control device 25 is provided with data on the relationship between the amount of combustion heat and the amount of air supplied (air volume), and the target air volume corresponding to the required combustion heat amount obtained by calculation. And controls the rotation of the combustion fan 13 so that the air volume detected by the air volume detection sensor 16 becomes the target air volume. In the figure, reference numeral 27 denotes a fan rotation detection sensor for detecting the number of rotations of the combustion fan 13 per unit time.

[0007]

As described above, a part of the combustion air supplied from the combustion fan 13 to the burner 4 is diverted through the air distribution passage 15 to detect the fan airflow.
By performing the rotation control of the combustion fan 13 based on the air volume detection information, a suitable air-fuel ratio control in which the amount of combustion heat and the air volume match can be performed. However, combustion fan 1
The air taken in from the outside by 3 contains dust such as dust and trash, and the air volume detection sensor 16 directly contacts the air passing through the air branch passage 15 to detect the air volume. Adheres to the air volume detection section, and as the amount of dust attached increases, the air volume detection performance of the air volume detection sensor 16 deteriorates, and the reliability of long-term air volume detection is impaired. There is a problem that the accuracy of the fuel ratio control is also reduced.

In order to solve such a problem, the applicant has proposed a ventilation rectifier having a dust trap function incorporating an air volume detection sensor 16 as shown in FIG.

The proposed air flow rectification device has a device case 28.
The internal space is divided into a front space and a back space by a partition member 30, and a dust trap passage 31 is formed in the front space, and a rectifying passage 32 is formed in the back space as shown in FIG. A trap wall 33 is formed in the dust trap passage 31 so as to protrude at right angles from both side walls of the passage, and a partition wall 34 for dividing the left and right dust trap passages 31 is provided at a central portion. The trap passage 31 communicates with the rectifying passage 32.

That is, the partitioning member 30 on the left side of the partition wall 34 has a communicating hole 3 communicating with one end of the flow regulating passage 32.
5a, and the partition member 3 on the right side of the partition wall 34
0 is provided with a communication hole 35b communicating with the other end side of the rectification passage 32, and the entrance side 36 of the dust trap passage 31 on the left side.
The wind flow introduced from the dust trap passage 3 on the left
1, the air is guided from the communication hole 35a to the rectifying passage 32 on the rear side, and the wind passing through the rectifying passage 32 is guided from the communication hole 35b to the right dust trap passage 31 formed on the front side, and the dust trap on the right side is formed. The air is sent out from the outlet side 37 of the dust trap passage 31 through the passage 31.

The straightening passage 32 is a straight passage connecting the communication holes 35a, 35b arranged in parallel via the partition wall 34 at the shortest distance. The air flow detecting sensor 16 is provided at the center of the straightening passage 32. is set up. The ventilation rectifier with a dust trap function is provided in the air distribution passage 15 with its inlet side 36 as the air chamber 14 side of the water heater and its outlet side 37 as the combustion chamber 3 side.

In this apparatus, the wind of the flowing combustion air is meandered by the trap wall 33 as shown by the arrow in FIG. 9, and when the wind is bent by the trap wall 33, the air is blown. Since the dust contained therein receives the inertial force in the straight traveling direction, it cannot turn sharply, but hits the trap wall 33 and is prevented from entering,
The dust is captured and removed, and the wind from which the dust has been removed enters the rectification passage 32, thereby preventing dust from adhering to the air volume detection unit of the air volume detection sensor 16, and the air volume detection sensor 1
6 is intended to guarantee the air volume detection accuracy over a long period of time and to improve the accuracy and reliability of the air volume detection.

However, in the ventilation straightening device shown in FIG. 9, the communication holes 35a and 35b are arranged adjacent to each other via the partition wall 34, and the communication holes 35a and 35b are connected in a shortest straight line. Since the passage 32 is provided, the wind entering the straightening passage 32 from the communication hole 35a side is bent at a right angle, the flow path fluctuates due to the bending of the course, and the straight passage of the straightening passage 32 is short, so that the communication Since the wind bent at right angles from the hole 35a and coming into contact with the air flow rate detection sensor 16 in a state where the flow velocity fluctuation is not eliminated, the air flow is detected, the detected value of the air flow fluctuates due to the flow velocity fluctuation, and the accurate air flow is obtained. Cannot be detected with high accuracy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a ventilation rectifier capable of guiding air from which dust has been removed to a rectification state in which the flow velocity does not fluctuate and leading the air to a flow rate detection sensor. It is to provide a device.

[0015]

Means for Solving the Problems In order to achieve the above object, the present invention has the following structure to solve the above problems. That is, in the first invention, a partition member that partitions the space inside the device case into front and back is provided,
A dust trap passage is formed in the space on the front side of the partition member to divide the air supplied to the burner, take in the air, pass through the taken air, and remove dust, and the dust trap passage is formed in the partition member. A communication hole that guides the ventilation passing through to a space on the back side of the partition member is provided, and a rectification passage that rectifies the ventilation passing through the communication hole and supplies the rectified air to the air volume detection sensor is provided in the space on the back side. In the ventilation straightening device for a combustion device, the inlet side of the straightening passage is provided in a region near one end of the outer wall of the device case, and the straightening passage extends from the inlet side to a diagonal position of the device case. Is a means for solving the above-mentioned problem.

According to a second aspect of the present invention, there is provided means for solving the above-mentioned problem by providing a configuration in which an air flow detecting sensor is provided in the rectifying passage of the first aspect.

According to a third aspect of the present invention, there is provided the structure of the second aspect of the present invention, wherein the front space is divided into two, and the divided front space receives air supplied to the burner and takes in dust. A dust trap passage is formed on the inlet side for supplying the inlet side of the rectifying passage by removing the same, and a communication hole communicating the space on the other side and the outlet side of the rectifying passage is provided in the partition member, and the other side is provided. In the front side space, there is formed a dust trap passage on the outlet side for guiding the air flowing out of the rectifying passage to the outside, and this is a means for solving the above problem.

In the invention having the above construction, the inlet of the rectifying passage is provided in a region near one end of the outer wall of the device case, and the rectifying passage is formed by a straight passage extending toward the diagonal position of the device case from the inlet. Because of the configuration, the rectifying passage can be extended, and a rectifying passage having a length that can eliminate flow velocity fluctuations of the air entering from the dust trap passage and supply rectified ventilation to the air volume detection sensor can be provided. This makes it possible to supply rectified ventilation to the airflow detection sensor, thereby avoiding the problem of variations in the detection values of the airflow detection sensor due to fluctuations in the flow velocity of the ventilation, and providing accurate airflow. The air volume can be detected, and the above-mentioned problem is solved.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a model diagram showing a ventilation rectifier for a combustion apparatus according to the first embodiment, and FIG. 1B is a rectification passage portion characteristic of this embodiment. Are extracted and shown by the cross section. The ventilation rectifier shown in this embodiment is provided in the air distribution passage 15 of the water heater shown in FIG. In this embodiment, the description of the configuration of the water heater shown in FIG.

A characteristic of the first embodiment is that, as shown in FIG. 1A, the inlet side and the outlet side of the rectifying passage 32 are at diagonal positions with respect to each other.
The rectifying passage 32 is provided in a region near the corner portion (region near one end) of the outer wall of No. 8 and a straight passage connecting the entrance side and the exit side. In the description of this embodiment, the same components as those of the ventilation rectifier shown in FIG. 9 are denoted by the same reference numerals, and description of the common components will be omitted.

In this embodiment, a rectifying passage 32 is formed in the internal space of the device case 28 on the back side of the partition member 30, and the inlet and outlet sides of the rectifying passage 32 are connected through communication holes 35a and 35b, respectively. It is connected to the space on the front side of the partition member 30, and the entrance side and the exit side of the rectification passage 32, that is, the communication hole 35 a and the communication hole 35 b are
As described above, the rectifying passages 3 are provided in the vicinity of the corners of the outer wall of the device case 28 at diagonal positions with respect to each other.
Reference numeral 2 denotes a straight passage connecting the entrance side and the exit side. As described above, since the rectifying passage 32 is formed along the diagonal line of the device case 2, the rectifying passage 32 can be formed much longer than the length of the rectifying passage 32 shown in FIG. May be long enough to rectify the flow of air and supply it to the airflow detection sensor 16. In this embodiment, the air volume detection sensor 16 is incorporated in the center of the rectification passage 32 to form a unit.

The entrance side dust trap passage 31 and the exit side dust trap passage 31 are formed separately in the front side space, and the entrance side dust trap passage 31 (in FIG. The dust trap passage 31) is formed such that the entrance side 36 is an entrance side and the communication hole 35a is an exit side, and the ventilation entering from the entrance side 36 is trapped by the trap wall 3.
As described above, there is provided a configuration in which the airflow is meandered by 3 and the dust in the airflow is captured and removed using the inertial force of the airflow in the airflow, and flows into the rectification passage 32 from the communication hole 35a. The exit side dust trap passage 31 (the right side dust trap passage 31 in FIG. 1A) has the communication hole 35b as the entrance side, the exit side 37 as the exit side, and the entrance side dust trap passage 31 with the entrance side. Has a similar form,
A configuration is provided in which the ventilation flowing out of the flow regulating passage 32 through the communication hole 35b is sent out from the outlet side 37 to the outside.

When the hot water heater is installed outdoors, for example, when the combustion operation is stopped and the head wind blows on the water heater side, the dust trap passage 31 on the outlet side is provided with the wind of the head wind. Is the outlet side 37 of the dust trap passage 31 on the outlet side.
When the air enters as a reverse wind, dust contained in the reverse wind is removed by the same action as the dust trapping and removing action of the dust trap passage 31 on the entrance side, and the wind in the opposite direction is generated by the dust trap passage 31 on the exit side. When the air flows into the rectification passage 32 from the side, dust contained in the headwind is removed, and a clean airflow free of dust is generated by the airflow detection sensor 1.
6 to prevent the dust component of the headwind from adhering to the airflow detection sensor 16.

The air flow rectifying device with a dust trap function shown in this embodiment is constructed as described above, and the inlet side 36 is set to the air chamber 14 side of the water heater and the outlet side 37 is set to the combustion chamber 3 side. A part of the air supplied to the burner 4 is diverted from the air chamber 14 and flows into the air distribution passage 15 through the distribution passage 15, and the air flows from the entrance 36 to the dust trap on the entrance side of the ventilation rectifier. It enters the passage 31.

As described above, the ventilation entering the dust trap passage 31 is meandering by the trap wall 33, and when the ventilation is bent by the trap wall 33, the dust contained in the ventilation is reduced. Dust cannot be sharply turned to receive the inertial force in the straight traveling direction, but hits the trap wall 33 and dust is captured and removed by the trap wall 33.

Thus, the air from which dust has been removed by the dust trap passage 31 on the entry side flows into the rectification passage 32 from the communication hole 35a. The ventilation flowing into the rectifying passage 32 from the communication hole 35a is bent at a right angle to cause a variation in the flow velocity. However, the variation in the flow velocity is resolved before reaching the air flow detection sensor 16, and the rectified ventilation is transmitted to the air flow detection sensor 16
, And a detection value with almost no variation is output from the air volume detection sensor 16, and an accurate air volume can be accurately detected.

The air passing through the air volume detection sensor 16 travels toward the exit side of the rectifying passage 32, flows out of the communication hole 35b into the dust trap passage 31 on the exit side, and flows from the exit side 37 of the dust trap passage 31 to the air flow. It is sent to the road 15.

According to this embodiment, the inlet and outlet sides of the flow regulating passage 32 are provided in the vicinity of the corner of the outer wall of the device case 28 at diagonal positions with respect to each other. Are formed along the diagonal line, the rectification passage 32 can be extended as compared with the rectification passage 32 shown in FIG. A passage length that can be supplied can be secured.

From this, it is possible to supply the rectified ventilation to the air volume detection sensor 16, and the detection value from which the problem of the variation caused by the variation of the flow velocity of the ventilation is eliminated is output from the air volume detection sensor 16. As a result, an accurate air volume can be detected with high accuracy.

Hereinafter, a second embodiment will be described. The characteristic feature of this embodiment is that, similarly to the first embodiment, the rectifying passage 32 is formed along the diagonal line of the device case 28 to extend the rectifying passage 32 and the dust is provided. This is to provide a configuration for further improving the dust trap performance of the trap passage.

FIG. 2 shows a characteristic dust trap passage in the second embodiment. As shown in the figure, the space inside the device case 28 is divided into front and back by a partition member 30, and the space on the front side of the partition member 30 is divided into two by a partition wall 34. In FIG.
The dust trap passage 31 on the entrance side is located in the space on the left front side.
Is formed, and a dust trap passage 31 on the outlet side is formed in the space on the right front side. In this embodiment, trap walls 41 which alternately protrude into the passage from the passage inner wall surfaces of the dust trap passages 31 facing each other are arranged in the passage length direction.

A trap wall 41 projecting from one of the left and right side walls of the dust trap passage 31 on the entry side, and a trap wall 41 projecting from the inner wall surface of the right passage in FIG. Is formed by the first U-turn wall 41a of the form. Further, the first U-turn wall 41a substantially separates from the inner wall surface of the passage opposite to the dust trap passage 31 in the U-turn direction.
A second U-turn wall 41b is formed, which turns the direction of the wind flow converted by the 80 ° direction again (turns the direction of the wind approximately 180 °) and changes the direction of the wind flow to the forward direction. 41b is formed so as to protrude in an oblique direction along the forward flow direction of the wind (the flow direction in the straight direction of the dust trap passage 31).

The first U-turn wall 41a and the second U-turn wall 41b are overlapped at the protruding tip sides thereof with a gap 42 extending in the length direction of the passage. In FIG. 2, this overlap section is indicated by A. The first U-turn wall 4 of this overlapping part
1a and the second U-turn wall 41b are at an acute angle α
And the first U-turn wall 41a moves from the front end side to the front end side of the second U-turn wall 41b.
The distance 4 between the U-turn wall 41a and the second U-turn wall 41b
2, the cross-sectional area of the flow of the wind is gradually reduced to increase the flow velocity of the flow of the wind when the air flows out of the outlet-side throttle opening 45 and to send the flow to the next U-turn path.

FIG. 3 shows the action of capturing and removing dust 46 contained in the wind passing through the dust trap passage 31 in this embodiment. The wind passing through the dust trap passage 31 follows the path indicated by the arrow and travels meandering in a U-turn shape. In other words, the wind traveling in the dust trap passage 31 makes a U-turn in the opposite direction by the first U-turn wall 41a and enters the space surrounded by the second U-turn wall 41b and the left side wall of the passage. And this wind flow is the second
As the U-turn is again performed by the U-turn wall 41b and the direction is changed by approximately 180 °, the direction is meandering while sequentially changing the direction in a U-turn shape.

As described above, the wind flow largely changes the direction of about 180 ° due to the U-turn, and the dust contained in the wind flow tends to advance in the tangential direction of the wind bending path due to its inertial force. When the wind turns largely in a U-turn, even small dust cannot follow the turn of the large flow, deviates from the path of the wind and collides with the first U-turn wall 41a, and the dust 46 Is captured and removed by the first U-turn wall 41a.

After the U-turn in the reverse direction, the wind entering the space surrounded by the second U-turn wall 41b and the left side wall of the passage from the opening 47 on the tip side of the first U-turn wall 41a is applied by the second U-turn wall 41b. Again, the direction is changed to a U-turn shape by changing the direction almost 180 °, but at the time of this forward U-turn, the wind flow changes greatly again, so that dust remaining without being trapped and removed in the wind flow is Left side wall and second U-turn wall 4
1b to be captured and removed.

As described above, the wind 46 repeatedly changes in the U-turn shape in the reverse direction and the forward direction, so that the dust 46 contained in the air flow is efficiently captured and removed.
By repeatedly capturing and removing dust by repeating the U-turn change of the flow, it is possible to obtain clean air in which dust components are completely captured and removed in the final U-turn portion.

In particular, in this embodiment, the gap 42 where the first U-turn wall 41a and the second U-turn wall 41b overlap increases the flow velocity by narrowing the passage area when exiting the outlet throttle opening 45. Since the next U-turn is performed in a state where the flow velocity is increased, the inertia force of the dust 46 is increased by an amount corresponding to the increase in the flow velocity, and the dust 46 deviates from the bending path of the wind flow by the increase in the inertia force. Since the efficiency of trapping and removing is increased, the effect of trapping and removing dust 46 can be further enhanced, and the dust trap passage 31 is shortened to reduce the first U-turn wall 41a.
Even if the number of the second U-turn walls 41b is reduced, dust can be reliably removed, so that the dust trap device can be downsized.

In addition, in this embodiment, when the flow of the wind moves from the opening 47 on the front end side along the first U-turn wall 41a to the next forward U-turn operation, the passage is cut off by the opening 47. Because the area is narrowed,
Regardless of whether the operation shifts to the reverse direction or the forward direction of the U-turn, the U-turn operation is performed with the flow velocity accelerated once, and the dust removal effect by the U-turn operation of the wind flow is further enhanced. Becomes

Further, when the wind passes through the outlet-side aperture openings 45 and 47, the cross-sectional area of the wind passage is gradually reduced, so that the change of the throttle of the wind is continuously and smoothly performed. The effect that the pressure loss of the wind flow can be reduced as compared with the case where the pressure is rapidly reduced is obtained.

In this embodiment, the dust trap passage 31 on the outlet side is also connected to the dust trap passage 3 on the inlet side.
1, and a rectifying passage 32 is formed in a space on the back side of the partition member 30.
The inlet side and the outlet side of the rectifying passage 3 are provided in the vicinity of the corners of the device case 28 which are at diagonal positions to each other.
Reference numeral 2 denotes a straight passage connecting the entrance side and the exit side. The inlet side of the rectification passage 32 is connected to the dust trap passage 31 on the front side through the communication hole 35a, and the outlet side is connected to the dust trap passage 31 on the front side through the communication hole 35b. I have.

According to this embodiment, the rectifying passage 32 is formed along the diagonal line of the device case 28 as in the first embodiment, so that the rectified ventilation is supplied to the air volume detection sensor 16. A rectification passage having a length capable of performing the rectification can be configured, the rectified ventilation can be supplied to the air volume detection sensor 16, and the detected value in which the problem of the variation due to the flow velocity fluctuation is eliminated is obtained as the air volume. The output can be output from the detection sensor 16, and from this, the air volume can be detected with high accuracy.

In addition, in this embodiment, trap walls which alternately protrude from the inner wall surface of the dust trap passage 31 are provided.
Since it is constituted by the U-turn wall that changes in the turning direction, as described above, an excellent dust removing effect can be enhanced, and clean air with completely dust removed is supplied to the air volume detection sensor 16. As a result, long-term reliability of the air volume detection accuracy of the air volume detection sensor 16 can be obtained.

It should be noted that the present invention is not limited to the above embodiments, but can take various embodiments. For example, in the present invention, the inner space of the device case is divided into front and back by a partition member, a rectifying passage is provided in the back space, and dust in the ventilation is removed in the front space to provide clean ventilation. The present invention can be applied to any ventilation rectifier provided with a dust trap passage for supplying the rectifying passage, and the form of the dust trap passage is not limited to the above embodiments.

For example, the present invention can be applied to a ventilation straightening device provided with a dust trap passage as shown in FIG. In the example shown in FIG. 4, the dust trap passage 31 on the right entrance side is provided in the space on the front side of the partition member 30.
And the dust trap passage 31 on the outlet side on the left side are defined by the partition wall 34.
The dust trap passage on the entry side is a passage leading to the communication hole 35a on the exit side while bending the ventilation entering from the inlet 36, and the trap wall 33 is formed from the inner wall surface of the dust trap passage 31. The projection is formed. The ventilation entering from the inlet 36 flows along the dust trap passage 31, but when the ventilation flow is bent, the dust in the ventilation receives a straight inertia force and deviates from the ventilation flow. 33a, 33
The dust is caught and removed in the dust storage space 50 formed by the b and 33c.

When large dust is contained in the ventilation passing through the inlet 36, the large dust falls by the own weight and is trapped in the trap wall 33d before the flow of the ventilation is bent. In this way, clean air from which dust has been removed by the dust trap passage 31 can be sent out from the communication hole 35a to the rectification passage 32. Since the cross-sectional area of the dust trap passage 31 shown in FIG. 4 can be increased, the pressure loss of ventilation can be reduced.

In the ventilation rectifier shown in FIG.
The exit side dust trap passage 31 has a configuration similar to the entrance side dust trap passage 31 for removing dust in the reverse wind, and as shown by a dotted line in FIG.
The entry side of the rectification passage 32 is provided in a region near the corner of the device case 28, and the rectification passage 32 is formed by a straight passage extending from the entry side toward a diagonal position of the device case 28, whereby Similarly to the embodiment, the rectifying passage 32 can be formed to a length that can rectify the ventilation and supply the rectified air to the air volume detection sensor 16, and the accurate air volume can be accurately detected by the air volume detection sensor 16. It becomes possible.

The present invention can also be applied to a ventilation straightening device having a dust trap passage 31 as shown in FIG.

In the ventilation rectifier shown in FIG. 5, similarly to each of the ventilation rectifiers, the internal space of the device case 28 is divided into front and back by a partition member 30, and the air volume detection sensor 16 is arranged in the space on the back. A rectifying passage 32 is formed, and the space on the front side is divided into two by a partition wall 34.
In, the dust trap passage 31 on the entry side is formed in the upper space on the front side, and the dust trap passage 31 on the exit side is formed in the space on the lower front side.

As shown in FIG. 5, the dust trap passage 31 on the entry side is formed in a conical shape whose diameter decreases from the entrance 36 to the exit side, and a trap projection 51 is formed in the dust trap passage 31. The trap projection 51 also has a smaller radius from the entrance 36 toward the exit. Further, the interval between the trap projections 51 is formed so as to become narrower from the entrance of the dust trap passage 31 on the entry side to the exit side.

The dust trap passage 31 shown in FIG.
Makes the wind flow from the inlet side to the outlet side meander when passing through the trap protrusion 51, and captures and removes dust using the inertial force of the dust 46. In particular, the diameter of the trap projection 51 is reduced from the entrance side to the exit side of the dust trap passage 31 shown in FIG.
The dust trapped and removed at the entrance side and the exit side of the dust trap passage 31 such that the large-diameter dust 46 is captured and removed at the entrance side of the dust trap passage 31 and the small-diameter dust 46 is captured and removed at the exit side. Is divided (separated).

That is, on the inlet side of the dust trap passage 31, the diameter of the trap projection 51 is large, so that the flow of the wind gently bypasses the trap projection 51. However, since the course of the path is small, the wind travels along the path of the wind.However, even if the large path of the dust has a small course of the path, a large inertial force acts on the path. Collision is captured and removed. Entry side dust trap passage 3
Since the diameter of the trap protrusion 51 is small on the exit side of the first part, the curve of the wind path that bypasses the trap protrusion 51 also has a small diameter and a large change in the curve. For this reason, even if the dust is minute, the dust deviates from the bent path of the wind due to the inertial force of the trapped projection 5.
As a result, the large dust is caught and removed at the entrance side, and the fine dust is caught and removed at the exit side, so that the air passing through the dust trap passage 31 on the entrance side is removed. There is no dust component inside and it is possible to send out clean air.

In the ventilation rectifier shown in FIG. 5,
The exit side dust trap passage 31 has a configuration similar to the entrance side dust trap passage 31 for removing dust in the reverse wind, and the rectifying passage 32 is formed along a diagonal line of the device case 28. Thus, the flow straightening passage 32 can be extended, and it is necessary to rectify the clean air from which dust has been removed by the dust trap passage 31 on the entrance side and supply it to the air volume detection sensor 16. A rectifying passage 32 having a length can be formed, and the air flow detection sensor 16 can be formed in the same manner as in each of the above embodiments.
Can output a detection value in which the problem of the variation caused by the flow velocity fluctuation is solved, and it is possible to accurately detect an accurate air volume.

Further, the present invention can be applied to a ventilation straightening device having a dust trap passage 31 as shown in FIG. The dust trap passage 3 shown in FIG.
In 1, air flow obstruction members 52 are scattered in the central region of the passage, and trap walls 33 are formed to project from both sides of the inner wall surface of the dust trap passage 31 in a region between the obstruction members 52.

In the dust trap passage 31, the ventilation that has entered the passage is meandered by the obstacle member 52 and the trap wall 33, and the dust is captured by the trap wall 33 using the inertia force of the dust 46. Is to be removed. The present invention can also be applied to such a ventilation straightening device having the dust trap passage 31 shown in FIG.

Further, in each of the above embodiments, as shown in FIG. 1B, the partition member 30 is formed of a flat plate-shaped member. As shown in FIG. 7, the partition member 30 at the portion where the communication hole 35a is formed is bent obliquely downward so as to allow the air flow to enter the straightening passage 32 from the base 31 in a curved and gentle manner. May be.

Further, the trap wall 33 (4) provided in the dust trap passage 31 of each ventilation rectifier described above.
A filter member may be attached to 1) or the trap protrusion 51. In this way, the effect of capturing and removing dust can be further enhanced by mounting the filter member.

Further, each of the ventilation rectifiers described above is provided with a dust trap passage 31 on the outlet side. When a filter member or the like to be removed is provided, dust in the reverse wind is removed by the filter member, so that the air from which the dust has been removed enters the ventilation rectifier. The dust trap passage 31 may be omitted.

Further, in each of the above embodiments, the case where the ventilation rectifier is provided in the water heater is shown. However, the ventilation rectifier shown in the present invention can be provided in combustion equipment other than the water heater. Yes, for example, it can be installed in a bath alone device or a bath / hot water supply combined device.

[0061]

According to the present invention, the entry side of the rectifying passage is provided in a region near one end of the outer wall of the device case, and the rectifying passage is formed to extend from the entry side toward a diagonal position of the device case. Since it is constituted by a straight passage, the straightening passage can be extended. That is, it is possible to form a rectifying passage having a length necessary to rectify the ventilation supplied to the air volume detection sensor, and to supply the rectified ventilation with the flow velocity fluctuation removed to the air volume detection sensor. From this, the airflow detection sensor can output a detection value in which the problem of the variation caused by the flow velocity fluctuation is eliminated, and can accurately detect the accurate airflow.

In the case where the air flow detecting sensor is provided in the rectifying passage, the ventilation rectifying device and the air flow detecting sensor are unitized. Therefore, the ventilation rectifying device and the air flow detecting sensor are separately provided in the combustion equipment. Since the ventilation rectifier and the airflow detection sensor can be attached to the combustion equipment at the same time as compared with the case where the airflow rectification device and the airflow detection sensor are attached to each other, the work of attaching the ventilation rectification device and the airflow detection sensor can be simplified.

The front-side space is divided into two parts, and one of the divided front-side spaces is formed with an entrance-side dust trap passage, and the other front-side space is formed with an exit-side trap passage. In such a case, clean air from which dust has been removed by the dust trap passage on the entrance side can be sent out to the rectifying passage, so that dust can be prevented from adhering to the air volume detection sensor. When a headwind enters the ventilation rectifier, dust in the headwind can be removed by the dust trap passage on the outlet side, and dust components in the headwind can also be prevented from adhering to the airflow detection sensor. It is possible to completely prevent dust from adhering to the air volume detection sensor, guarantee the air volume detection accuracy of the air volume detection sensor for a long time, and detect the air volume of the air volume detection sensor. It is possible to time and increased reliability.

[Brief description of the drawings]

FIG. 1 is a model diagram showing a first embodiment of the present invention.

FIG. 2 is a model diagram showing a second embodiment example.

FIG. 3 is a model diagram showing a dust removing action in a dust trap passage shown in FIG. 2;

FIG. 4 is a model diagram showing another embodiment of the dust trap passage of the ventilation rectifier to which the present invention is applied.

FIG. 5 is a model diagram showing still another example of a dust trap passage.

FIG. 6 is a model diagram showing still another example of a dust trap passage.

FIG. 7 is an explanatory view showing another embodiment of the partition member.

FIG. 8 is a model diagram showing an example of a water heater that is a combustion device to which the ventilation rectifier according to the present invention can be equipped.

FIG. 9 is a model diagram showing an example of a ventilation rectifier proposed by the present inventors.

FIG. 10 is a cross-sectional view illustrating a straightening passage portion of the ventilation straightening device shown in FIG. 9;

[Explanation of symbols]

 16 Air volume detection sensor 28 Device case 30 Partition member 31 Dust trap passage 32 Rectification passage

Claims (3)

[Claims] 1. A partition member for partitioning a space inside an apparatus case into front and back sides, and air supplied to a burner is diverted into a space on the front side of the partition member to allow the fetched air to flow. A dust trap passage for removing dust is formed, and the partition member is provided with a communication hole for guiding ventilation passing through the dust trap passage to a space on the back side of the partition member, and the communication hole is provided in the back space. In a ventilation rectification device of a combustion device provided with a rectification passage for rectifying the passed ventilation and supplying the rectified passage to an air volume detection sensor,
An inlet of the rectifying passage is provided in a region near one end of an outer wall of the device case, and the rectifying passage is formed by a straight passage extending from the inlet to a diagonal position of the device case. Ventilation rectifier for combustion equipment. 2. The ventilation rectification device for a combustion apparatus according to claim 1, wherein an air flow detection sensor is provided in the rectification passage. 3. The front side space is divided into two parts, and the divided one side space takes in air supplied to the burner, removes dust, and supplies the air to the inlet side of the rectifying passage. A dust trap passage is formed, a communication hole communicating the front side space on the other side and the outlet side of the rectification passage is provided in the partition member, and the ventilation flow flowing out of the rectification passage is provided in the other front side space. 3. The ventilation rectifier for combustion equipment according to claim 2, wherein a dust trap passage on the exit side for leading to the outside is formed.