JP2021090922A - Drain neutralizer - Google Patents

Abstract

To provide a drain neutralizer that prevents false detection of a full electrode.SOLUTION: There is provided a drain neutralizer, including a drain inlet to which a fastener for fixing a drain introduction pipe can be fixed, a first full electrode and a second full electrode on an upper surface of a container, and a drain exhaust port on a side wall of the container, in which the drain inlet, the first full electrode, and the second full electrode are arranged side by side in one direction, and a neutralizing chamber is provided below the drain inlet, and a neutralizing agent is provided in the neutralizing chamber, and a first upright wall that stands up toward outside of the container is provided between the drain inlet and the first full electrode, and a height of the first upright wall with the upper surface of the container as a base point in an outward direction is higher than a height of either the drain inlet or the first full electrode.SELECTED DRAWING: Figure 4

Description

The present invention relates to a drain neutralizer incorporated in a latent heat recovery type water heater.

As a conventional example, a drain neutralizer that neutralizes strongly acidic drain generated in a heat exchanger is provided with a water level full electrode for detecting an abnormal rise in the water level in the container. It has been known.
In this drain neutralizer, a neutralizing agent is provided in the container, and the drain passes through the neutralizing agent to be neutralized and safely drained. (See, for example, Patent Document 1)

Japanese Unexamined Patent Publication No. 2016-223653

A drain introduction port is arranged in the vicinity of the water-filled electrode of the drain neutralizer, and the water-filled electrode has a structure in which a lead wire portion is friend-tightened to an electrode portion having a screw shape, and the drain introduction port is also provided. Has a structure in which the drain introduction pipe is connected and fixed with a metal fastener such as a quick fastener.

Since the amount of the neutralizer in the drain neutralizer is finite, when the neutralizer is exhausted, it is necessary to replace or replenish the neutralizer or replace the drain neutralizer itself. In addition, impurities accumulated in the drain neutralizer cause an abnormal water level in the drain neutralizer, so cleaning the drain neutralizer or replacing the drain neutralizer itself is necessary to remove the impurities. You will need it.

When replacing the drain neutralizer, remove the full electrode having the electrode portion and the lead wire portion, the drain introduction pipe fixed to the drain introduction port, and the fastener from the drain neutralizer, and then remove the new one. After replacing the drain neutralizer, it is necessary to fix the full electrode to the new drain neutralizer and fix the drain introduction pipe to the drain introduction port with a fastener.
At this time, if the full water electrode and the metal fastener come into contact with each other and cause a short circuit, there becomes a problem that the operation of the full water electrode is not stable, such as causing a malfunction.

The present invention has been studied to solve the above problems, and an object of the present invention is to provide a drain neutralizer capable of preventing contact between a fastener and a full electrode and improving maintainability.

In order to achieve the above object, in claim 1 of the present invention, a drain introduction port, a first full water electrode, and a second full water electrode to which a fastener for fixing the drain introduction pipe can be fixed are provided on the upper surface of the container. Then, in a drain neutralizer having a drain drain port on the side wall of the container, the drain introduction port, the first full water electrode, and the second full water electrode are arranged in this order in one direction, and the drain is arranged. A neutralizing chamber is provided below the introduction port, and a neutralizing agent is provided in the neutralizing chamber, and a first standing wall that stands up toward the outside of the container is provided between the drain introduction port and the first full water electrode. The height of the first standing wall with the upper surface of the container as a base point in the outward direction is higher than the height of either the drain introduction port or the first full electrode.

Further, in claim 2, a second standing wall that stands up toward the outside of the container is provided between the first filled electrode and the second filled electrode, and the second standing with the upper surface of the container as a base point. The height of the wall in the outward direction is characterized by being higher than the height of either the first full electrode or the second full electrode.

According to claim 1 of the present invention, since the first standing wall that stands up toward the outside of the container is provided between the drain introduction port and the first full electrode, the drain neutralizer is replaced for maintenance or the like. In this case, when attaching a fastener such as a quick fastener or when attaching the first full water electrode, it is possible to prevent electrical contact between the fastener and the first full water electrode, and therefore malfunction due to contact can be prevented. It can be prevented and maintainability can be improved.

According to claim 2 of the present invention, since the second standing wall that stands up toward the outside of the container is provided between the first filled electrode and the second filled electrode, the drain neutralizer can be used for maintenance or the like. When the first full electrode and the second full electrode are fixed to the container in the case of replacement, electrical contact between the first full electrode and the second full electrode can be prevented, and therefore malfunction due to contact can be prevented. Can be prevented and maintainability can be improved.

Schematic diagram of the water heater according to the first embodiment of the present invention Longitudinal sectional view of the drain neutralizer according to the first embodiment of the present invention. Top perspective view of the drain neutralizer according to the first embodiment of the present invention. Top view of the drain neutralizer according to the first embodiment of the present invention.

Hereinafter, embodiments of the drain neutralizer according to the present invention will be described with reference to the drawings.
1 is a latent heat recovery type water heater as a latent heat recovery type heat source machine of the present embodiment, 2 is a burner that burns fuel such as oil, 3 is a blower that supplies combustion air to the burner 2, and 4 is above the burner 2. The combustion chamber 5 provided in the above is a heat exchange unit housed in the combustion chamber 4.

The heat exchange unit 5 is a fin tube type primary heat exchanger 7 that recovers sensible heat from the combustion gas generated by the combustion of the burner 2 and heats water as a fluid to be heated flowing through the primary heat receiving tube 6, and primary heat. It is composed of a secondary heat exchanger 9 that recovers latent heat from the combustion gas that has passed through the exchanger 7 and heats water as a fluid to be heated that flows through the secondary heat receiving tube 8, and is composed of primary heat exchangers 7 and 2. The combustion gas that has passed in the order of the next heat exchanger 9 is exhausted from the exhaust port 10 to the outside of the latent heat recovery type water supply machine 1.

Reference numeral 11 denotes a drain receiver that recovers the strongly acidic drain generated when the water vapor in the combustion gas exchanges heat with the water flowing through the secondary heat receiving tube 8 of the secondary heat exchanger 9 and the temperature becomes below the dew point. , Which is located below the secondary heat exchanger 9.
Reference numeral 12 denotes a drain introduction pipe that guides the drain collected by the drain receiver 11 to the drain neutralizer 13.

Reference numeral 14 denotes a substantially rectangular parallelepiped container filled with a neutralizing agent 15 made of calcium carbonate, and the upper surface 14a of the container 14 has a tubular drain introduction port 17 and a pair of full water electrodes 18. ..
The full water electrode 18 extends through the first full water electrode 19 near the drain introduction port 17 and the second full water electrode 20 farther than the first full water electrode 19 substantially perpendicularly to the upper surface 14a and extends into the container 14. Then, the water level of the drain in the container 14 is detected, and the latent heat recovery type water heater 1 is stopped in order to prevent the drain from overflowing from the container 14 when the drain reaches a predetermined water level.

Here, the fixing of the fastener 100 will be described with reference to FIG.
A metal fastener 100 such as a quick fastener is inserted and fixed horizontally to the surface of the upper surface 14a at the connection position between the drain introduction port 17 and the drain introduction pipe 12.
Specifically, a flange portion is provided at the upper end of the drain introduction port 17, and a flange portion is provided near the end portion of the drain introduction pipe 12, and the lower side of the flange portion and the upper side of the flange portion are pressed by the fastener 100. To prevent it from coming off in the axial direction.

Next, the configuration of the full water electrode will be described with reference to FIG.
The first water-filled electrode 19 includes an electrode portion 19a having a screw head 19b and a screw-shaped screw portion 19c, a lead wire covering portion 19e, and a lead wire portion 19d having a metal lead wire terminal portion 19f. The portion 19c is screwed and fixed from the outside to the inside of the upper surface 14a.
The second full water electrode 20 also has a configuration similar to that of the first full water electrode 19.

FIG. 4 is an example in which the first full water electrode 19 and the fastener 100 are fixed.
When the first filled electrode 19 is fixed to the upper surface 14a, the position of the lead wire terminal portion 19f, which is a metal portion, is determined at the position where the electrode portion 19a is closed.

As a result, the lead wire terminal portion 19f, which is a metal portion of the first filled electrode 19, and the metal fastener 100 are arranged close to each other, and the metal portions come into contact with each other depending on how they are fixed. It is at a distance to do.

However, in the present invention, the first upright wall 91 that stands up toward the outside of the container 14 is provided between the drain introduction port 17 and the first full water electrode 19, and the first is that the upper surface 14a of the container 14 is used as a base point. The height of the upright wall 91 in the outward direction was higher than the height of either the drain introduction port 17 or the first full water electrode 19.
The length of the first upright wall 91 is about twice as long as the length from the axis center of the screw portion 19c to the boundary between the lead wire covering portion 19e and the lead wire terminal portion 19f.

Therefore, when the drain neutralizer 13 is replaced, when the fastener 100 such as a quick fastener for fixing the drain introduction pipe 12 is fixed to the drain introduction port 17 and the first full water electrode 19 is fixed to the container 14. The contact between the fastener 100 and the lead wire terminal portion 19f of the first full water electrode 19 can be prevented, and therefore malfunction due to these contacts can be prevented, and maintainability can be improved.

Further, a second upright wall 92 that stands up toward the outside of the container 14 is provided between the first full water electrode 19 and the second full water electrode 20, and a second upright wall 92 with the upper surface 14a of the container 14 as a base point is provided. The height of the 92 in the outward direction was higher than the height of either the first full electrode 19 or the second full electrode 20.
The length of the second upright wall 92 is set to be the same as the length of the first upright wall 91.
Therefore, when the drain neutralizer 13 is replaced and the first full water electrode 19 and the second full water electrode 20 are fixed to the container 14, the lead wire terminal portion of the first full water electrode 19 and the second full water electrode 20 are used. It is possible to prevent contact with the lead wire terminal portion of the above, and therefore, it is possible to prevent malfunction due to these contacts, and it is possible to improve maintainability.

Reference numeral 31 denotes a tubular drain discharge port extending in the horizontal direction on one side wall 23 of the container 14, and the drain stored in the container 14 and neutralized is discharged to the outside of the neutralizer 13.

32 is a drain drain pipe connected to the drain discharge port 31 and drains the neutralized drain discharged from the drain neutralizer 13 to the outside, and 33 is a water supply that distributes the water supplied from the water supply source to the heat exchange unit 5. The pipes and 34 are hot water supply pipes for circulating hot water heated by the heat exchange unit 5 and supplying hot water to hot water taps (not shown) provided at predetermined locations, and 35 are water supply bypass pipes branched from the water supply pipe 33. is there.

36 is provided at the connection portion between the hot water supply pipe 34 and the water supply bypass pipe 35, and the hot water from the hot water supply pipe 34 and the water from the water supply bypass pipe 35 are mixed and the mixing ratio can be changed. A water supply temperature sensor provided in 33 to detect the water supply temperature, 38 is a flow rate sensor provided in the water supply pipe 33 to detect the flow rate, and 39 is provided in the hot water supply pipe 34 to detect the temperature of the hot water heated by the heat exchange unit 5. The heat exchange outlet temperature sensor 40 is a hot water supply temperature sensor provided in the hot water supply pipe 34 on the downstream side of the mixing valve 36 and detecting the temperature of the hot water mixed by the mixing valve 36.

Reference numeral 41 denotes a remote controller for instructing the operation of the latent heat recovery type water heater 1, and the remote controller 41 has an operation switch 42 for instructing on / off of the operation of the latent heat recovery type water heater 1 and a hot water supply temperature setting switch for setting the hot water supply temperature. It is provided with an operation unit 43 such as, and a display unit 44 that displays the status of the latent heat recovery type water heater 1 and the hot water supply set temperature.

The 45 mainly receives a signal from the full water electrode 18, a water supply temperature sensor 37, a flow rate sensor 38, a heat exchange outlet temperature sensor 39, a hot water supply temperature sensor 40, and a signal from the remote control 41 of the latent heat recovery type water heater 1. , A control means for controlling the drive of each actuator such as the blower 3 and the mixing valve 36, and the control means 45 has a timer 46 that integrates and stores the operating time of the latent heat recovery type water heater 1.
By counting the predetermined integration time, the timer 46 displays a display prompting the display unit 44 to replace or replenish the neutralizing agent 15 before the neutralizing agent 15 is consumed and disappears.

Next, the operation of the latent heat recovery type water heater 1 of this embodiment will be described.
When the operation switch 42 of the remote control 41 was on, the hot water supply plug (not shown) provided at a predetermined location was opened, and the flow rate sensor 38 detected a flow rate equal to or higher than the minimum operating flow rate, and a combustion request was generated. When the control means 45 determines, the blower 3 and the fuel pump (not shown) are driven to start combustion in the burner 2.

The combustion gas generated by the combustion of the burner 2 passes through the primary heat exchanger 7, passes through the primary heat exchanger 7, passes through the secondary heat exchanger 9, and then passes through the secondary heat exchanger 9. , It is discharged from the exhaust port 10 to the outside of the latent heat recovery type water heater 1.
Further, the water supplied from the water supply source is supplied from the water supply pipe 33, guided from the water supply pipe 33 to the secondary heat receiving pipe 8, and circulated in order from the secondary heat receiving pipe 8 to the primary heat receiving pipe 6, and is secondary. It is heated by heat exchange with the combustion gas in the heat exchanger 9 and the primary heat exchanger 7.
Then, the hot water that is guided from the primary heat receiving pipe 6 to the hot water supply pipe 34 and whose temperature is adjusted to the hot water supply set temperature by adjusting the opening degree of the mixing valve 36 is finally supplied from the hot water supply plug.

At this time, in the secondary heat exchanger 9, the water flowing through the secondary heat receiving pipe 8 and the combustion gas exchange heat, and the drain generated when the water vapor in the combustion gas becomes the dew point or less is the drain receiver 11. It is collected in the above and flows into the drain introduction port 17 of the drain neutralizer 13 through the drain introduction pipe 12.
The drain falls into the container 14 from the drain introduction port 17, is neutralized by the neutralizing agent 15 provided in the container 14, and is discharged to the outside of the drain neutralizer 13 from the drain discharge port 31 provided on the side wall 23 of the container 14. It is drained to the sewage at the specified location.
Further, the neutralizing agent 15 of the drain neutralizer 13 gradually reacts with the drain and decreases according to the amount of the drain passing through. The neutralizing agent 15 decreases over several years to ten and several years depending on the usage state of the water heater 1, and the neutralizing agent 15 is replenished or the drain neutralizer 13 itself is replaced before it disappears.

The water level of the drain in the drain neutralizer 13 normally maintains the water level of the drain discharge port 31 shown by the alternate long and short dash line in FIG. 2, is newly generated by the operation of the water heater 1, and is added from the drain introduction port 17. A large amount of drainage is sequentially drained from the drain discharge port 31.
However, since impurities contained in the combustion air are mixed in the drain, the water level of the drain rises when the dust 29 such as the accumulation of the impurities blocks the drain discharge port 31 due to the use of the water heater 1 for many years. To rise. After the drain water level rises and reaches the full water electrode 18, the control means 45 stops the operation of the water heater 1 when the resistance value between the first full water electrode 19 and the second full water electrode 20 is detected to be equal to or less than a predetermined value. At the same time, the display unit 44 indicates that the drain neutralizer 13 is abnormal and full of water is generated.

The determination of the arrival of the maintenance time of the drain neutralizer 13 will be described.
The filling amount of the neutralizing agent 15 to be filled in the drain neutralizer 13 is predetermined, and the total amount of drain that can be neutralized with respect to the filling amount is also the neutralizing agent (calcium carbonate) and water (drain). Can be easily derived from the chemical reaction formula of.
In the present embodiment, the timer 46 counts the predetermined integration time (the operation integration time of the water heater) to replace or replenish the neutralizing agent 15 on the display unit 44 before the neutralizing agent 15 is consumed and exhausted. It is determined that the maintenance time of the drain neutralizer 13 such as replacement of the drain neutralizer 13 itself has arrived, and the notification to that effect is given.

The present invention is not limited to the one embodiment described above. In the present embodiment, the latent heat recovery type water heater 1 has been described as an example, but heat dissipation from a floor heating panel, a panel convector, or the like has been described. It may be applied to a latent heat recovery type hot water heating device that has a terminal and can circulate hot water heated by a burner to perform a heating operation.

Further, the other configurations used in the present embodiment are presented as an example, and are not intended to limit the scope of the invention, and can be implemented in various other embodiments. Various omissions, replacements, and changes can be made without departing from the gist of. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

12 Drain introduction pipe 13 Drain neutralizer 14 Container 14a Top surface 15 Neutralizer 17 Drain introduction port 19 1st full water electrode 20 2nd full water electrode 23 Side wall 31 Drain discharge port 50 Neutralization chamber 91 1st upright wall 92 2nd upright wall 100 fasteners

Claims (2)

Drain neutralization having a drain introduction port, a first full electrode, and a second full electrode on the upper surface of the container and a drain drain port on the side wall of the container to which a fastener for fixing the drain introduction pipe can be fixed. In the container
The drain inlet, the first full electrode, and the second full electrode are arranged side by side in one direction in this order.
A neutralization chamber is provided below the drain introduction port, and a neutralizer is provided in the neutralization chamber.
A first upright wall that stands up toward the outside of the container is provided between the drain introduction port and the first full water electrode.
A drain neutralizer characterized in that the height of the first upright wall with the upper surface of the container as a base point in the outward direction is higher than the height of either the drain introduction port or the first full water electrode. A second standing wall that stands up toward the outside of the container is provided between the first filled electrode and the second filled electrode.
The first aspect of the present invention, wherein the height of the second standing wall with the upper surface of the container as a base point in the outward direction is higher than the height of either the first filled electrode or the second filled electrode. Drain neutralizer.

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