JP6860838B2 - Neutralizer - Google Patents

Description

The present invention relates to a hot water supply device that heats hot water by exchanging heat with a combustion gas to supply hot water. In particular, in a latent heat recovery type hot water supply device that recovers the latent heat of the combustion gas and heats the hot water, the acidic drain generated from the combustion gas is generated. Regarding a neutralizer that neutralizes and drains water.

Conventionally, a hot water supply device that recovers the sensible heat of combustion gas to heat and supply hot water has been widely used. Further, in recent years, a latent heat recovery type hot water supply device having high energy efficiency that recovers the latent heat of combustion gas to heat hot water is also widely used.

The latent heat recovery type hot water supply device includes a primary heat exchanger and a secondary heat exchanger. The primary heat exchanger recovers the sensible heat of the combustion gas and heats the hot water, and the secondary heat exchanger recovers the latent heat of the combustion gas after recovering the sensible heat and heats the hot water. In these heat exchangers, the hot water passages are connected so that the hot water heated by the secondary heat exchanger is further heated by the primary heat exchanger.

In the secondary heat exchanger, the combustion gas cools below the dew point by heat exchange with low-temperature hot water. Therefore, the moisture contained in the combustion gas condenses and drainage is generated. The drain takes in sulfur oxides and nitrogen oxides contained in the combustion gas and exhibits strong acidity. This drain is collected in a drain pan, introduced into a neutralizer, neutralized, and then drained to the outside.

The neutralizer includes, for example, as in Patent Document 1, a drain introduction port, a neutralizer storage chamber for accommodating a granular neutralizer mainly composed of calcium carbonate crystals, a drain drain port, and a drain introduction port. A water seal that seals water between drains, a pair of electrodes for detecting a rise in the drain water level, an electrode chamber that houses this pair of electrodes and communicates with the neutralizer storage chamber, and water. It is equipped with a drain plug for draining the seal. To prevent the neutralizer from clogging the drain and the drain plug, the structure is usually such that the neutralizer cannot enter around them. In addition, if a pair of electrodes come into contact with a neutralizing agent, a rise in water level may be erroneously detected. Therefore, some electrodes are provided with a partition or the like so that the neutralizing agent does not enter around the pair of electrodes. ..

Japanese Patent No. 5647512

By the way, water heaters are being miniaturized due to market needs such as space saving and wall mounting. Therefore, the devices built into the hot water supply device are required to be compact, and one of them is a compact neutralizer. However, a compact neutralizer requires replenishment of the neutralizing agent because the amount of the neutralizing agent that can be accommodated is small, but it is not preferable to replenish the neutralizing agent frequently because it is inconvenient for the user. Therefore, the neutralizer is required to be large enough to accommodate the amount of neutralizer required for long-term, eg, 15-year use.

Further, it is necessary to have a partition around the electrodes to prevent contact with the neutralizing agent so that the pair of electrodes for detecting the rise in the water level of the drain do not come into contact with the neutralizing agent and erroneously detect them. Furthermore, in order to prevent the combustion gas from leaking to the outside through the neutralizer, it is necessary to provide a water seal in the passage through which the drain passes. A drain plug that drains water from the water seal to prevent freezing and a structure that prevents the drain plug from being clogged with a neutralizing agent are also required. As described above, the neutralizer needs to meet various demands, and it is not easy to miniaturize it.

An object of the present invention is to provide a neutralizer that can be miniaturized while satisfying the requirements for a neutralizer of a hot water supply device.

The neutralizer according to claim 1 is a neutralizer that neutralizes the drain generated when the combustion gas of the combustion type hot water supply device reaches a temperature below the dew point with a neutralizing agent. A storage chamber for accommodating a neutralizing agent, a pair of electrodes for detecting the water level of the drain, a first electrode chamber and a second electrode chamber for accommodating each of the pair of electrodes, and drainage of the drain. Each side wall portion of the first and second electrode chambers is provided with a mouth, and first and second slits communicating with the accommodation chamber are provided at least at the upper end portion and the lower end portion thereof, and the first electrode chamber is provided with the first and second slits. A drain plug is provided ,
A drain passage through which the drain can flow down is formed in the storage chamber through a plurality of wall portions that partition the storage chamber, and the drain passage is divided into two by a water sealing wall portion. Is provided, and the first electrode chamber communicates with the water sealing portion on the upstream side of the water sealing wall portion by the first slit, and the drain passage on the upstream side of the water sealing portion is at least It is partitioned so as to form two compartments, and a notch portion communicating with the most upstream compartment of the at least two compartments is provided at the upper end portion of the side wall of the first electrode chamber, and the notch portion is used as described above. It is characterized in that a preliminary passage through which the drain can flow down is formed in the water sealing portion through the first electrode chamber and the first slit.

According to the above configuration, the drain can be stored and neutralized in the storage chamber containing the neutralizing agent, and the neutralized drain can be drained from the drain port. Further, the first electrode chamber can allow the drain to enter by the first slit communicating with the accommodating chamber and can prevent the entry of the neutralizing agent larger than the slit width. In addition, a drain plug is provided in the first electrode chamber, and the first electrode chamber and the drain plug share the first slit to prevent the drain plug and the neutralizing agent from clogging the drain plug. Since the installation space can be saved, the neutralizer can be miniaturized.

Then, the leakage of the combustion gas can be prevented by the water sealing portion of the drain passage. Further, when there is a risk of freezing, the drain of the water sealing portion can be drained from the drain plug of the first electrode chamber to prevent the water sealing portion from freezing.

Furthermore, the drain that has stopped flowing due to clogging in the drain passage on the upstream side of the water seal can be drained from the drain port by letting it flow down to the reserve passage and neutralizing it on the downstream side of the drain passage including the water seal. is there. Further, since the first electrode chamber is configured to have the function of the spare passage and the installation space of the spare passage can be saved, it is advantageous for the miniaturization of the neutralizer.

According to the present invention, various effects as described above can be obtained.

It is a front view of the hot water supply device provided with the neutralizer of this invention. It is a perspective view which looked at the neutralizer of FIG. 1 from the front diagonally upper right. It is a perspective view which looked at the neutralizer of FIG. 2 from the front diagonally lower left. It is a perspective view which looked at the inside of the neutralizer of FIG. 2 from the rear diagonally upper left. It is a top view of the inside of the neutralizer of FIG.

Hereinafter, embodiments for carrying out the present invention will be described based on examples.

First, the overall configuration of the hot water supply device 1 will be described with reference to FIG.
The hot water supply device 1 is a latent heat recovery type combustion type hot water supply device including a combustion unit 2, a primary heat exchanger 3, a secondary heat exchanger 4, a neutralizer 5, a control unit 6, and the like. The combustion unit 2 includes a blower 7 for sending combustion air, a burner for burning fuel gas (not shown), and the like. The primary heat exchanger 3 is connected on the combustion unit 2, the secondary heat exchanger 4 is connected on the primary heat exchanger 3, and the burner and the primary and secondary heat exchangers 3 and 3 are connected from the blower 7. A passage for combustion gas is formed through 4 in order to reach the exhaust port 8.

The primary heat exchanger 3 recovers the sensible heat of the combustion gas generated in the burner to heat the hot water. The secondary heat exchanger 4 recovers the latent heat of the combustion gas that has passed through the primary heat exchanger 3 to heat the hot water. The primary heat exchanger 3 and the secondary heat exchanger 4 are connected with hot water passages so that the clean water heated by the secondary heat exchanger 4 is further heated by the primary heat exchanger 3. The combustion gas that has passed through the secondary heat exchanger 4 is exhausted to the outside from the exhaust port 8 provided on the front side of the hot water supply device 1.

The drain generated when the combustion gas becomes below the dew point in the secondary heat exchanger 4 is introduced into the neutralizer 5, neutralized by the neutralizing agent contained in the neutralizer 5, and drained to the outside. Will be done. Further, although not shown, the hot water supply device 1 includes a fuel passage for supplying fuel gas to the burner, a water supply passage for supplying clean water to the heat exchanger, a hot water supply passage for supplying heated hot water, and a combustion gas. It is equipped with a passage for reheating the bath to exchange heat with the hot water of the bath. Although not shown, the hot water supply device 1 is provided with a temperature sensor or the like for detecting the temperature of each part, and the control unit 6 determines the rotation speed of the blower 7 or the thermal power of the combustion part 2 based on the detection signal of the temperature sensor or the like. To control hot water supply operation, etc.

Next, the neutralizer 5 will be described.
As shown in FIGS. 2 and 3, the neutralizer 5 is composed of a container 11 formed of a synthetic resin in a box shape and a synthetic resin upper lid 12 whose upper portion is watertightly closed. The upper lid 12 is provided with an introduction port 13 for introducing drain, and a drain pipe for introducing the drain generated in the secondary heat exchanger 4 into the neutralizer 5 is connected to the introduction port 13. The drain passage may extend downward from the introduction port 13. Further, when the drain water level in the neutralizer 5 rises, a pair of electrodes 14a and 14b capable of detecting the rise in the drain water level by the current flowing through the drain is inserted into the neutralizer 5. A pair of electrode insertion portions 15a and 15b are provided on the upper lid 12. The pair of electrodes 14a and 14b are inserted so as to project downward by, for example, 10 mm from the lower surface of the upper lid 12. At the bottom of the neutralizer 5, a drain port 16 for the neutralized drain and a drain plug 17 capable of draining the drain in the container 11 are provided.

As shown in FIGS. 4 and 5, the inside of the neutralizer 5 is partitioned by a plurality of wall portions to accommodate a storage chamber 21 for storing a neutralizing agent (not shown) and a pair of electrodes 14a and 14b. A pair of electrode chambers 22a and 22b and a drainage port chamber 23 having a drainage port 16 are provided. The accommodation chamber 21 is partitioned by a plurality of wall portions, and the first to sixth sections 21a to 21f are provided. By communicating with an opening at the upper end portion or the lower end portion of the wall portion partitioning between the respective compartments, a drain passage through which the drain can flow down in order from the first compartment 21a to the sixth compartment 21f of the most upstream compartment is formed. There is. The drainage port chamber 23 has an opening 23a at the upper end of the side wall that communicates with the sixth compartment 21f, and when the water level of the drain in the sixth compartment 21f rises from the lower end of the opening 23a, the drainage outlet chamber 23a and the drainage port chamber It is discharged to the outside from the drain port 16 through 23.

The third section 21c and the fourth section 21d are partitioned by a water sealing wall portion 20a having an opening at the lower end portion, and between the second section 21b and the third section 21c and between the fourth section 21d and the fifth section 21e. The space is partitioned by wall portions 20b and 20c each having an opening at the upper end portion to form a water sealing portion 25. The neutralizing agent (not shown) contained in the first to sixth compartments 21a to 21f formed in the storage chamber 21 is inserted to a height at which a gap of, for example, about 10 mm is provided between the neutralizing agent and the upper lid 12.

The pair of electrode chambers 22a and 22b are provided with a first electrode chamber 22a that accommodates the electrodes 14a and a drain plug 17 at the bottom, and a second electrode chamber 22b that accommodates the electrodes 14b adjacent to each other. There is. The side wall of the first electrode chamber 22a between the third section 21c is provided with a first slit 26 communicating with the third section 21c of the drain passage at least at the upper end portion and the lower end portion thereof. The side wall portion of the second electrode chamber 22b between the first compartment 21a and the second electrode chamber 22b is provided with a second slit 27 communicating with the first compartment 21a at least at the upper end portion and the lower end portion thereof. In this embodiment, the first and second slits 26 and 27 are provided over the entire height of the side wall between the third compartment 21c and the first compartment 21a, respectively, and a plurality of box-shaped containers 11 and a plurality of partitions in the container 11 are partitioned. It facilitates the collective formation of walls.

Drain can enter the second electrode chamber 22b through the second slit 27, but the neutralizing agent is a granular material mainly composed of calcium carbonate crystals, and the size thereof is larger than the width of the second slit 27. Due to its large size, the neutralizer does not enter the second electrode chamber 22b.

On the other hand, in the first electrode chamber 22a, the drain can enter through the first slit 26 as in the second electrode chamber 22b, but the neutralizing agent larger than the width of the first slit 26 is the first electrode chamber 22a. Don't get inside. Since the third section 21c and the fourth section 21d constituting the water sealing portion 25 communicate with each other under the water sealing wall portion 20a partitioning between them, the drainage provided at the bottom of the first electrode chamber 22a is provided. By opening the stopper 17, the water sealing portion 25 can be drained.

Further, a notch 28 communicating with the first compartment 21a is provided at the upper end of the side wall between the first compartment 21a and the first electrode chamber 22a. Therefore, between the first section 21a and the third section 21c, a spare passage through which the drain can flow down is formed through the notch 28, the first electrode chamber 22a, and the first slit 26. This reserve passage is provided in the first section 21a between the first section 21a and the second section 21b or between the second section 21b and the third section 21c, for example, when the drain cannot flow down due to the generation of biofilm. The drain can be drained from the drain port 16 by flowing down to the third section 21c.

The action and effect of the neutralizer 5 of the present invention will be described.
The neutralizer 5 includes a neutralizing agent accommodating chamber 21 and first and second electrode chambers 22a and 22b. The side wall portion of the first electrode chamber 22a is provided with a first slit 26 communicating with the accommodating chamber 21 at least at the upper end portion and the lower end portion, and the side wall portion of the second electrode chamber 22b is provided with the accommodating chamber at least at the upper end portion and the lower end portion. A second slit 27 communicating with the 21 is provided. The first and second slits 26 and 27 allow the drain to enter the first and second electrode chambers 22a and 22b, and the neutralizing agent larger than the slit width cannot enter. A drain plug 17 is provided in the first electrode chamber 22a so that the first electrode chamber 22a and the drain plug 17 share the first slit 26. It is possible to reduce the size of the neutralizer 5 by reducing the installation space of the structure that prevents the unplug 17 from being clogged.

Further, a drain passage composed of the first to sixth compartments 21a to 21f is formed in the accommodation chamber 21, and the first electrode chamber 22a communicates with the water sealing portion 25 provided in the drain passage by the first slit 26 to seal the water. When there is a risk of freezing of the part 25, the drain can be drained from the drain plug 17 to prevent freezing. Further, when the drain passage on the upstream side of the water sealing portion 25 is clogged, it is possible to bypass the clogged drain passage and drain the water from the drain port 16 by letting the drain flow down to the spare passage passing through the first electrode chamber 22a. is there. Since the first electrode chamber 22a is configured to be usable as a spare passage and the installation space of the spare passage is omitted, the neutralizer 5 can be miniaturized. The neutralizing agent is gradually consumed and becomes smaller so that it can pass through the first and second slits 26 and 27, but the height of the neutralizing agent contained at this time is also lowered, so that a pair of electrodes is used. There is no risk of contact with 14a and 14b. Further, even if the drain plug 17 is opened, the reduced neutralizing agent is discharged together with the drain, so that the drain plug 17 is not clogged.

In addition, a person skilled in the art can carry out the embodiment in a form in which various modifications are added to the embodiment without departing from the spirit of the present invention, and the present invention includes such modifications.

1 Hot water supply device 2 Combustion unit 3 Primary heat exchanger 4 Secondary heat exchanger 5 Neutralizer 11 Container 12 Top lid 13 Introductory port 14a, 14b Electrodes 15a, 15b Electrode insertion part 16 Drainage port 17 Drain plug 20 Wall part 21 Accommodating portions 21a to 21f 1st to 6th compartments 22a 1st electrode chamber 22b 2nd electrode chamber 23 Drainage port chamber 23a Opening 25 Water sealing portion 26 1st slit 27 2nd slit 28 Notch

Claims (1)

In a neutralizer that neutralizes the drain generated when the combustion gas of a combustion type hot water supply device reaches a temperature below the dew point with a neutralizer.
The drain inlet, the accommodating chamber for accommodating the neutralizing agent, the pair of electrodes for detecting the water level of the drain, and the first electrode chamber and the second electrode chamber accommodating each of the pair of electrodes. Equipped with an electrode chamber and a drain outlet for the drain
The side wall portions of the first and second electrode chambers are provided with first and second slits communicating with the accommodation chamber at least at the upper end portion and the lower end portion thereof.
A drain plug is provided in the first electrode chamber .
In the accommodation chamber, a drain passage through which the drain can flow down is formed through a plurality of wall portions partitioning the accommodation chamber.
The drain passage is provided with a water sealing portion divided into two by a water sealing wall portion.
The first electrode chamber communicates with the water sealing portion on the upstream side of the water sealing wall portion by the first slit.
The drain passage on the upstream side of the water seal portion is partitioned so as to form at least two compartments.
At the upper end of the side wall of the first electrode chamber, a notch portion communicating with the most upstream section of the at least two sections is provided.
A neutralizer characterized in that a preliminary passage through which the drain can flow down is formed from the notch portion to the water sealing portion via the first electrode chamber and the first slit.

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