JP6029504B2 - Latent heat recovery type heat source machine - Google Patents

Description

  The present invention relates to a latent heat recovery type heat source apparatus that recovers sensible heat and latent heat from combustion exhaust.

  Heat recovery efficiency is improved by providing a latent heat recovery heat exchanger that further recovers the latent heat of the exhaust downstream of the sensible heat recovery heat exchanger that mainly recovers sensible heat from the air heated by the burner (combustion exhaust). There is a heat source machine such as a latent heat recovery type water heater configured as described above.

  In such a latent heat recovery type heat source machine, water vapor contained in the exhaust gas condenses during the recovery of latent heat to generate condensed water (drain). This drain becomes acidic by absorbing nitrogen oxides and sulfur oxides in the exhaust gas. Therefore, in the latent heat recovery type heat source machine, drain is recovered, neutralized by a neutralizer, and then drained from a drain outlet.

  Usually, the neutralizer is configured by putting a neutralizer in a container having a water seal structure. In a state where drain is accumulated in the neutralizer and sealed with water, the exhaust does not leak out from the drain outlet through the neutralizer. However, since the neutralizer is in a dry state at the time of shipment from the factory, there is no drain inside and it is not sealed with water. Leaks out through the vessel. Exhaust leaked from the drain outlet not only causes discomfort to the people around you but also generates acidic drainage when condensed, so a heat source device is installed on the pipe shaft, etc., and piping and gas meters are nearby. And it will corrode them.

  Therefore, an operation in which an operator puts water into the neutralizer to ensure a water-sealed state before starting operation after installation is defined in the installation procedure.

  Patent Document 1 discloses a water heater that connects a water injection pipe branched from a water supply pipe to a neutralizer, and opens a solenoid valve provided in the middle of the water injection pipe so that water can be injected into the neutralizer. It is disclosed. This water heater is controlled so as to inhibit combustion until the water seal of the neutralizer is secured.

  In Patent Document 2 below, even if the water pipe passing through the latent heat recovery heat exchanger is corroded by the drain and the hole is opened, the water leaked from the hole is recovered in the drain pan and drained through the neutralizer. In order to solve the problem of not recognizing corrosion, a water heater provided with a water amount sensor for detecting the amount of water flowing through the drain pipe is disclosed in the middle of the drain pipe upstream of the neutralizer. Yes. This water amount sensor includes a reservoir space having a throttle at the bottom, a float that moves up and down in the reservoir space, and a sensor that detects the position of the float.

JP 2009-109085 A JP 2002-147847 A

  Even if the installation procedure stipulates that the operator put water into the neutralizer prior to the start of operation after installation, this work may not be performed due to the operator's mistakes or fatigue. On the other hand, when a water injection pipe or a solenoid valve is provided as disclosed in Patent Document 1, the manufacturing cost of the heat source device increases.

  In the water amount sensor disclosed in Patent Document 2, when the drain does not flow, the float is lowered and the throttle is covered. Therefore, in the state where the neutralizer is not sealed with water, the exhaust gas passes through the neutralizer and passes through the neutralizer. Plays a role in preventing leaks. However, there is a problem that when the dust or dirt collected in the drain pan flows into the drain pipe together with the drain, the throttle is immediately clogged.

  The present invention is intended to solve the above problem, and provides a latent heat recovery type heat source device capable of preventing exhaust from leaking outside through a drain discharge path before being sealed with water. It is aimed.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] a combustion part;
A heat exchanger that recovers sensible heat and latent heat from the exhaust of the combustion section;
A drain recovery section for recovering drain generated in the heat exchanger;
A drain discharge path for discharging the drain recovered by the drain recovery unit to the outside;
A water seal provided in the middle of the drain discharge path;
The water-sealing part seals the drain passage on the downstream side of the water-seal part or the outlet of the water-seal part or the outlet of the water-seal part on the downstream side of the water surface on the outlet side when the water-sealing of the water-seal part is completed. Sex sealant,
Have
The latent heat recovery type heat source machine, wherein the sealing material is dissolved by the drain after the water sealing in the water sealing portion is completed with the drain generated by combustion after shipment from the factory, and the sealing is released.

  In the above invention, the operation of the heat source machine is started after the installation with the water sealing part not sealed with the water sealing part just by sealing the outlet of the water sealing part with a water-soluble sealing material at the time of factory shipment. However, the exhaust is prevented from flowing to the outside through the drain discharge passage, and after the water sealing is completed, the sealing material is melted by the drain overflowing from the water sealing part, and the sealing is automatically released. Drainage through the road is secured.

[2] The latent heat recovery type heat source device according to [1], wherein the water seal portion functions as a neutralizer in which a neutralizer is inserted to neutralize the drain.

  In the said invention, a water seal part serves as the function of a neutralizer.

[3] The latent heat recovery type heat source machine according to [1] or [2], wherein the sealing material is water-soluble paper having a slight air permeability.

  In the above invention, when the water level in the water seal portion rises after completion of water sealing, the internal pressure rises because the outlet is sealed with the sealing material, but excessive internal pressure rise is suppressed by slight ventilation of the sealing material, Does not prevent the water level from rising. By setting the air permeability to “slight”, the exhaust does not leak through the sealing material before water sealing.

[4] The sealing material is formed by forming a film of a water-soluble substance having gas barrier properties on one surface of water-soluble paper, and the film is attached with the film facing the downstream side of the drain discharge path. The latent heat recovery type heat source machine according to [1] or [2].

[5] The latent heat recovery type heat source device according to [1] or [2], wherein the sealing material is composed of a water-soluble substance having gas barrier properties.

[6] [1], [2], [4] or [4], characterized in that a vent hole is provided in a passage between the water surface on the outlet side at the highest water level of the water sealing portion and the sealing material. The latent heat recovery type heat source machine according to [5].

  In the above invention, when using a sealing material having gas barrier properties (without air permeability), an excessive increase in internal pressure when the water level in the water sealing portion further rises after completion of water sealing is avoided by the pores for ventilation, The rise in water level after the completion of water sealing is secured.

[7] The latent heat recovery type heat source device according to [6], wherein the ventilation pores are opened in a main body of the latent heat recovery type heat source device.

  In the above invention, even if a slight amount of exhaust gas leaks from the ventilation pores before sealing with water, it will enter the main body of the heat source machine, so that the influence on the surroundings will be suppressed to a lesser extent than when discharging directly to the outside of the apparatus. Can do.

[8] The latent heat recovery type heat source device according to [6], wherein the ventilation pores are opened to an exhaust path of the latent heat recovery type heat source device.

  In the said invention, the air and exhaust gas which escaped through the ventilation | gas_flowing pore are discharged | emitted outside through an exhaust route.

  According to the latent heat recovery type heat source apparatus of the present invention, it is possible to prevent the exhaust from leaking to the outside through the drain discharge path before being sealed with water, and the sealing is automatically released after the water sealing is completed. Drain drainage is secured.

It is a figure showing the composition of the outline of the heat source machine concerning an embodiment of the invention. It is a figure which shows the structure of a neutralizer. It is a figure which shows the state change of the neutralizer and sealing material at the time of installing the heat-source equipment shipped from the factory for the first time. It is a figure which shows the various attachment positions of a sealing material. It is a disassembled perspective view of a heat source machine. It is a figure which shows the example of the neutralizer which provided the pore for ventilation | gas_flowing in the upper part of the container of the back chamber side of a water seal part. It is a figure which shows the example of the neutralizer which provided the pore for ventilation | gas_flowing which connects a front chamber and a back chamber in the partition plate of a water seal part.

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

  FIG. 1 shows a schematic configuration of a heat source device 3 according to an embodiment of the present invention. The heat source unit 3 has a hot water supply function of heating the supplied water and discharging it. The heat source unit 3 mainly generates sensible heat from a burner 4 that burns combustion gas, a combustion fan 5 that sends air to the burner 4, and air (combustion exhaust) that is installed above the burner 4 and heated by the burner 4. A sensible heat exchanger 6 that collects and heats the feed water, and a latent heat heat exchanger that is arranged downstream of the sensible heat exchanger 6 by the air flow from the burner 4 and mainly collects the latent heat of the exhaust to heat the feed water. A container 7 is provided.

  The heat source unit 3 further includes a combustion chamber 8 in which the burner 4, the sensible heat exchanger 6, and the latent heat exchanger 7 are arranged in this order from the bottom, and an exhaust pipe 9 communicating with the upper end of the combustion chamber 8. Is provided.

  Below the latent heat exchanger 7, a tray 11 is provided for receiving and collecting acidic condensed water (drain) generated by collecting the latent heat of the exhaust. A drain recovery port 12 is provided at the bottom near the outlet of the exhaust tube 9. The drain recovered by the drain recovery unit (the tray 11 and the drain recovery port 12) is drained through the drain discharge pipe 13. A neutralizer 20 having a water sealing function and a function of neutralizing the drain is provided in the middle of the drain discharge pipe 13. A water-soluble sealing material 30 that seals the outlet of the neutralizer 20 is attached to the heat source device 3 at the time of shipment from the factory. Further, at the time of factory shipment, the inside of the neutralizer 20 is in a dry state without drain.

  FIG. 2 shows the configuration of the neutralizer 20 in more detail. The neutralizer 20 includes a water seal portion 21 (gray portion in FIG. 2) that performs a water seal function, and a drainage passage portion 23 that forms a drainage passage communicating with the outlet 22 of the water seal portion 21. The water seal portion 21 has a structure in which a hollow container is divided into two chambers (a front chamber 25 and a rear chamber 26) by a partition plate 24 so that the lower portion communicates therewith.

  A drain inlet 27 that receives drain from a drain discharge pipe 13 a upstream of the neutralizer 20 is provided in the upper portion of the front chamber 25. The drain inlet 27 is connected to the end of the drain discharge pipe 13a. In the upper part of the rear chamber 26, the aforementioned outlet 22 for discharging the neutralized drain is provided. The drainage channel portion 23 communicating with the outlet 22 forms a hollow cylindrical passage that extends downward from the outlet 22 along the water seal portion 21 by a predetermined length, and at the lower end thereof from the neutralizer 20. A connection port 28 for connecting the starting end of the downstream drain discharge pipe 13b is provided. The drainage channel portion 23 and the drain discharge pipe 13 b constitute a drain drainage channel on the downstream side of the water seal portion 21.

  The outlet 22 of the water seal portion 21 is positioned lower than the drain inlet 27. Further, the connection port 28 at the lower end of the drainage channel portion 23 is positioned lower than the outlet 22. In this example, the neutralizer 20 is airtight except for the openings of the drain inlet 27 and the connection port 28.

  The front chamber 25 and the rear chamber 26 of the water seal portion 21 are loaded with a neutralizing agent 29 for neutralizing condensed water. The neutralizing agent 29 is calcium carbonate or the like, and has a bean-sized size of about 1 cm in diameter. The drain that has flowed in from the drain inlet 27 is neutralized when passing through the gaps between a number of granular neutralizing agents 29 loaded in the front chamber 25 and the rear chamber 26 of the water seal portion 21.

  At the time of factory shipment, a sealing material 30 for sealing the connection port 28 is attached to the connection port 28 at the lower end of the drainage channel 23 of the neutralizer 20. The sealing material 30 is a water-soluble paper having a slight air permeability.

  Next, the effect | action of the sealing material 30 is demonstrated.

  FIG. 3 shows changes in the state of the neutralizer 20 and the sealing material 30 when the heat source device 3 shipped from the factory is installed and operated for the first time.

  At the time of shipment from the factory, as shown in FIG. 3A, the inside of the neutralizer 20 is in a state where the drain is empty and dried. When the operation is started in this state, a part of the exhaust gas tries to flow into the neutralizer 20 side through the drain discharge pipe 13a. However, since the outlet of the neutralizer 20 is blocked by the sealing material 30, Almost no exhaust gas is also prevented from flowing out through the drain discharge pipe 13b. If the sealing material 30 is not provided, a part of the exhaust gas flows out to the outside through the drain discharge pipe 13 and causes a problem as described in the background art section. The broken line in FIG. 3A indicates the flow of exhaust when the sealing material 30 is not provided.

  When the operation of the heat source device 3 is continued, drain begins to accumulate in the water seal portion 21 of the neutralizer 20. And as shown in FIG.3 (b), when the water level in the water seal part 21 of the neutralizer 20 rises and the water seal part 21 is in a state sealed with drainage, the water seal is thereafter used. Exhaust gas is prevented from flowing out through the drain discharge pipe 13.

  Thereafter, when the operation is further continued and the drain continues to flow into the neutralizer 20, the drain overflows from the outlet 22 of the water seal portion 21 and flows out to the drainage passage portion 23 as shown in FIG. Then, the sealing material 30 wet with the drain flowing out from the outlet 22 starts to melt, and after a while, the sealing material 30 is broken and the sealing is released as shown in FIG. Thereby, the drain overflowing from the water sealing part 21 is discharged | emitted outside through the drain discharge pipe 13b.

  Thus, at the time of shipment from the factory, only the outlet side of the neutralizer 20 is sealed with the water-soluble sealing material 30, and the neutralizer 20 is not sealed with water, and the heat source device 3 is installed after installation. Even if the operation is started, the exhaust is prevented from flowing out through the drain discharge pipe 13. Further, since the sealing material 30 is melted by the drain overflowing from the neutralizer 20 after the water sealing is completed and the sealing is automatically released, drainage of the drain through the drain discharge pipe 13 is ensured.

  Therefore, the operation | work which an operator puts water into a neutralizer and ensures a water seal state before the operation | movement start after installation becomes unnecessary. In addition, when the operator manually puts water, a water level sensor should be installed in the neutralizer to take measures such as prohibiting operation before the completion of water sealing and warning that water has been forgotten. However, in the heat source device 3 of the present embodiment, such a countermeasure is not required at all by providing the sealing material 30. Or the structure which connects the water injection piping branched from the water supply pipe to the neutralizer, and automatically injects water to the neutralizer by opening the electromagnetic valve provided in the middle of the water injection piping becomes unnecessary.

  The sealing material 30 is formed of water-soluble paper having a slight air permeability. When the water level of the drain in the water seal portion 21 rises from the state shown in FIG. 3B (when the water seal is completed) to the state shown in FIG. 3C, the water surface of the drain on the outlet side (rear chamber 26 side) The volume of the space from the sealing material 30 to the sealing material 30 gradually decreases, the internal pressure rises, and air gradually leaks to the outside from between the paper eyes constituting the sealing material 30. As a result, even in the neutralizer 20 that is airtight except the drain inlet 27 and the connection port 28, an excessive increase in internal pressure is suppressed, and an increase in the water level is not hindered.

Slight air permeability is ensured by the gaps between the paper fibers, but fine holes may be provided as long as there is a slight air permeability so as not to prevent the rise of the water level as described above. For example, there is little ventilation in 20 mm H ₂ O less than atmospheric pressure, 20 mm H ₂ O or more, e.g., at 50 mm H ₂ O from 30mmH ₂ O, it is desirable that the breathable enough not to interfere with the rise of the water level above is ensured.

In addition, since the pressure of the exhaust gas reaching the sealing material 30 is about 20 mmH ₂ O at the maximum, the negative pressure in the room (for example, the negative pressure due to opening and closing of the door is assumed to be about −20 mmH ₂ O) is taken into consideration. The sealing material 30 is not broken due to the sealing material 30 being broken at about 100 mmH ₂ O. Specifically, the material, thickness, attachment method and the like of the sealing material 30 are adapted to the above conditions. The same applies to the other types of sealing materials 30 described later.

  FIG. 4 shows various attachment positions of the sealing material 30. The sealing material 30 is provided so as to seal the outlet 22 of the water sealing part 21 (attachment position A in the figure), and is provided so as to seal any part of the drainage channel part 23 (for example, the attachment position B in the figure). ), Provided so as to block the connection port 28 of the neutralizer 20 (attachment position C in the figure), and provided so as to block any part of the drain discharge pipe 13b downstream from the neutralizer 20 (for example, FIG. Middle mounting position D).

  In addition, when the neutralizing agent 29 is not added to the water seal portion 21 or when the input amount is small, the water surface S of the drain on the outlet side (rear chamber 26) when the water seal is completed (the water surface is at the lower end of the partition plate 24). The sealing material 30 may be provided in the in-container passage (such as the attachment position E in the figure) of the water sealing portion 21 on the downstream side from the reached position. In short, the sealing material 30 may be attached to any location as long as it is downstream from the water surface S.

  Next, the case where the sealing material 30 which has gas barrier property is used is demonstrated.

  The sealing material 30 having gas barrier properties (in other words, having no air permeability) has the following two types as typical configurations.

(1) The sealing material 30 is formed by forming a film of a water-soluble substance having gas barrier properties on one surface of water-soluble paper by sticking, coating, or the like.
In this case, the sealing material 30 is attached with the surface on which the film (thin film) of the water-soluble substance is formed facing the downstream side of the drain discharge path. In the sealing material 30 having this configuration, the strength of withstanding the exhaust pressure or the like is secured in the paper portion. When the paper portion is melted with drain, the gas barrier film is immediately broken by water pressure. By making the gas barrier film water-soluble, the torn film is prevented from clogging the drainage path.

  Examples of water-soluble substances having gas barrier properties include starch (oblate), carrageenan, agar, pullulan, chitansan gum, pectin, arabinogalactan, resol type phenol resin, methylolated urea (urea) resin, methylolated melamine resin, polyvinyl alcohol, There are polyethylene oxide, polyacrylamide, carboxymethyl cellulose and the like.

(2) The sealing material 30 is composed of a water-soluble substance having gas barrier properties.
A water-soluble substance (for example, polyvinyl alcohol) is injection-molded to seal the outlet 22 of the water seal portion 21, the drain discharge pipe 13b, and the like. Further, a thin film (for example, a film shape or a sheet shape) of a water-soluble substance as the sealing material 30 is sandwiched between the above-described passage in the container downstream from the water surface S and the outlet (connecting port 28) of the neutralizer 20. For example, as shown in FIG. 5, a rubber hose 41 as a drain discharge pipe 13b is externally fitted to the connection port 28 at the outlet of the neutralizer 20 and fixed with a band 42. At this time, the connection port 28 and the rubber hose 41 are fixed. If the rubber hose 41 is inserted with a thin film of a water-soluble substance as the sealing material 30 interposed therebetween, the sealing material 30 can be easily attached. Alternatively, a water-soluble substance thin film as the sealing material 30 may be heat-sealed (thermally welded) in the container passage downstream of the water surface S described above, the outlet (connecting port 28) of the neutralizer 20, or the like.

  When sealing with the sealing material 30 which has gas barrier property, the air in a container cannot be escaped outside through the sealing material 30 with the raise of the water level in the water sealing part 21 after water sealing completion. Therefore, vent holes 44 (see FIG. 6) are provided in any part of the container that forms a space from the water surface at the highest water level on the rear chamber 26 side of the water sealing portion 21 to the sealing material 30, or the above-described portion. A gap is provided so that the container is not airtight. If the ventilation pore 44 is provided at a location lower than the maximum water level, drainage may leak from that portion, or if the water level becomes higher than the ventilation pore 44, air cannot be released.

  FIG. 6 shows an example in which vent holes 44 are provided in the upper part of the container on the rear chamber 26 side of the water seal portion 21. The ventilation pores 44 are opened in the main body of the heat source unit 3. During the operation of the heat source unit 3 before completion of water sealing, the exhaust gas leaks to the outside through the ventilation pores 44, though very little. Therefore, when the ventilation pores 44 are provided at positions as shown in FIG. 6, it is desirable that the heat source device 3 is an outdoor installation type. Further, since the ventilation pores 44 are opened in the main body of the heat source unit 3, for example, even when the heat source unit 3 is provided on the pipe shaft, the exhaust gas from the ventilation pores 44 directly flows into the pipe shaft. Therefore, gas pipes in the pipe shaft are not corroded.

  On the other hand, when the heat source device 3 is of an indoor installation type, it is desirable that even a slight amount of exhaust gas does not leak into the room through the ventilation pores 44. Therefore, the ventilation pores 44 are opened to the exhaust path of the heat source unit 3. For example, as shown in FIG. 7, when vent holes 45 for communicating the front chamber 25 and the rear chamber 26 are formed in the partition plate 24 at a position higher than the maximum water level, the outlet of the exhaust gas through the vent holes 45 is formed. It will be opened to the exhaust path. In this configuration, the exhaust gas does not leak to the outside during the operation of the heat source unit 3 before completion of water sealing. Further, after the water sealing is completed, when the water level in the neutralizer 20 rises, the air in the rear chamber 26 moves to the front chamber 25 side through the ventilation pores 45, and passes through the drain discharge pipe 13 a and the exhaust tube 9. It is discharged outside.

  Instead of providing the ventilation hole 45 in the partition plate 24, for example, the ventilation hole 44 of FIG. 6 is provided, and the outlet of the ventilation hole 44 is connected to the drain inlet 27 or the drain discharge pipe 13a with a pipe or the like. You may make it communicate.

  In FIG. 5, the partition plate 24 is provided with ventilation pores 45, the air on the rear chamber 26 side enters the front chamber 25 through the ventilation pores 45, and further the exhaust pipe through the drain inlet 27 and the drain discharge pipe 13a. The route from 9 to the discharge is indicated by a dashed arrow.

  As described above, in the heat source device 3 of the present embodiment, the passage in the container of the water sealing portion 21 on the downstream side of the water surface on the outlet side (the rear chamber 26 side) when the water sealing of the water sealing portion 21 is completed or the Since the water-soluble sealing material 30 is attached at the time of shipment from the factory so as to seal the drain discharge path (the drain path 23 and the drain discharge pipe 13b) on the downstream side of the outlet 22 of the water seal part 21 or the water seal part 22. It is possible to prevent the exhaust gas from leaking outside through the drain discharge pipe 13 in the operation before the water seal portion 21 is sealed with water. In addition, after the water sealing is completed, the sealing material 30 is melted by the drain overflowing from the water sealing part 21 and the sealing is automatically released, so that the drain overflowing from the neutralizer 20 can be smoothly passed through the drain discharge pipe 13b. Can be discharged.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  The sealing material 30 shown in the embodiment is an example, and may be made of other materials as long as it is water-soluble. Further, it does not have to be in the form of a film, a sheet, or a film, and may be a lump-like stuffing as long as it dissolves in water in a short time.

  In the embodiment, the neutralizing agent 29 is added to the water sealing portion 21 so that the water sealing portion 21 is also used as the neutralizer 20. However, a neutralizer and a water sealing portion for neutralizing the drain are provided separately. It doesn't matter.

  The heat source unit 3 is not limited to a water heater, and may be a heater or a dryer.

DESCRIPTION OF SYMBOLS 3 ... Heat source machine 4 ... Burner 5 ... Fan 6 ... Sensible heat exchanger 7 ... Latent heat exchanger 8 ... Combustion chamber 9 ... Exhaust tube 11 ... Sauce tray 12 ... Drain collection port 13, 13a, 13b ... Drain discharge pipe 20 ... Neutralizer 21 ... Water sealing part 22 ... Outlet 23 ... Drainage channel part 24 ... Partition plate 25 ... Front chamber 26 ... Rear chamber 27 ... Drain inlet 28 ... Connection port 29 ... Neutralizing agent 30 ... Sealing material 41 ... Rubber hose 42 ... Band 44 ... pores for ventilation 45 ... pores for ventilation A to E ... mounting position of sealing material S ... water surface when water sealing is completed

Claims (8)

A combustion section;
A heat exchanger that recovers sensible heat and latent heat from the exhaust of the combustion section;
A drain recovery section for recovering drain generated in the heat exchanger;
A drain discharge path for discharging the drain recovered by the drain recovery unit to the outside;
A water seal provided in the middle of the drain discharge path;
The water-sealing part seals the drain passage on the downstream side of the water-seal part or the outlet of the water-seal part or the outlet of the water-seal part on the downstream side of the water surface on the outlet side when the water-sealing of the water-seal part is completed. Sex sealant,
Have
The latent heat recovery type heat source machine, wherein the sealing material is dissolved by the drain after the water sealing in the water sealing portion is completed with the drain generated by combustion after shipment from the factory, and the sealing is released. The latent heat recovery type heat source device according to claim 1, wherein the water seal portion functions as a neutralizer in which a neutralizer is placed to neutralize the drain. The latent heat recovery type heat source device according to claim 1, wherein the sealing material is water-soluble paper having a slight air permeability. The sealing material is formed by forming a film of a water-soluble substance having gas barrier properties on one surface of water-soluble paper, and is attached with the film facing toward the downstream side of the drain discharge path. The latent heat recovery type heat source machine according to claim 1 or 2. The latent heat recovery type heat source device according to claim 1, wherein the sealing material is composed of a water-soluble substance having gas barrier properties. The latent heat recovery type according to claim 1, 2, 4, or 5, wherein a vent hole is provided in a passage between the water surface on the outlet side at the highest water level of the water sealing portion and the sealing material. Heat source machine. The latent heat recovery type heat source device according to claim 6, wherein the ventilation pores are opened in a main body of the latent heat recovery type heat source device. The latent heat recovery type heat source device according to claim 6, wherein the ventilation pores are open to an exhaust path of the latent heat recovery type heat source device.