JP5900799B2 - Piping joint member and heat source machine - Google Patents

Description

  The present invention relates to a pipe joint member connected to a pipe for discharging drain water and waste water generated in a latent heat recovery type heat source machine to the outside, and a heat source provided with such a pipe joint member Related to the machine.

  2. Description of the Related Art A heat source device that includes a combustion device such as a burner and a heat exchanger inside a housing and heats a heat medium such as hot water or antifreeze for the purpose of hot water supply or heating is widely known. In such a heat source machine, in order to improve the heat exchange efficiency between the combustion gas generated when the combustion device burns fuel and a heat medium such as hot water, the latent heat is recovered not only to the sensible heat of the combustion gas but also to the latent heat. There is what is called a recovery type.

  In this latent heat recovery type heat source machine, when the latent heat is recovered by the heat exchanger, the combustion gas and the heat exchanger come into contact with each other, whereby water vapor in the combustion gas is condensed and drain (condensation water) is generated. At this time, the combustion gas contains nitrogen oxide (NOx) generated by the reaction of nitrogen and oxygen in the air by combustion, and the generated drain exhibits strong acidity. As described above, in the latent heat recovery type heat source machine, structurally strong acid drainage is generated.

  If this acidic drain is drained to the outside without being treated, there is a concern that it may adversely affect the environment and the like. Therefore, some latent heat recovery type heat source machines are provided with a drain discharge system that guides the drain to the outside, and a neutralizer that neutralizes acidic drain in the middle of the drain discharge system. For example, Patent Document 1 discloses this type of heat source machine. In this type of heat source machine, since the drain generated in the heat exchanger is neutralized by the neutralizer and then drained to the outside, there is no adverse effect on the environment and the like.

  Further, some latent heat recovery type heat source machines have a heating function of circulating a heat medium between a heat exchanger and a heating device and supplying heat to the heating device via the heat medium. In such a heat source machine, the heat medium heated by the heat exchanger is flowed to a heating device such as a floor heating device or a fan convector, heat is transferred from the heat medium to the heating device, and the room is heated. Then, the heat medium having been cooled down via the heating device is flowed to the heat exchanger side, and the heat medium is again heated by the heat exchanger and then supplied to the heating device.

  Accordingly, the heat medium circulates in the circulation path formed so as to pass through the heat exchanger and the heating device, and further changes in temperature in the circulation path. Here, when the temperature of the heat medium changes, the volume of the heat medium expands and contracts accordingly. For this reason, this may cause an increase in pressure and a decrease in pressure in the circulation path. That is, when the volume of the heat medium flowing through the circulation path varies, the pressure in the circulation path may vary.

  Therefore, some heat source devices having a heating function are provided with devices such as an expansion tank in order to equalize excessive pressure rise and pressure drop. This expansion tank has a storage part capable of storing a heat medium, and is capable of flowing the heat medium from the circulation path to the storage part when the volume of the heat medium expands in the circulation path. It has become. That is, when the volume of the heat medium has increased, a part of the heat medium is poured into the storage portion to prevent an increase in pressure in the circulation path.

  However, according to this structure, when a large amount of heat medium flows into the storage part of the expansion tank, that is, when the amount of the heat medium that flows into the storage part exceeds the maximum storage amount of the storage part, It is conceivable that the heat medium overflows from the storage part of the expansion tank.

  Thus, as a means for treating the heat medium overflowing from the expansion tank, one that forms a drain pipe extending from the storage portion of the expansion tank to the outside is known. That is, when the heat medium overflows from the storage part of the expansion tank, the heat medium overflowed through the drain pipe is discharged to the outside. In a heat source machine that employs this type of processing means, the heat medium overflowing from the reservoir is discharged to the outside as waste water.

  Furthermore, some latent heat recovery type heat source machines have an automatic bath dropping function that supplies hot water to a bathtub and fills it with water. In such a heat source machine, hot water is supplied from a water supply pipe as an external water supply source to the heat exchanger, and the hot water is heated by the heat exchanger and then discharged from the heat exchanger toward the bathtub. It has become.

  Here, the Water Supply Law has a provision that prohibits direct connection between a water supply pipe and a pipe other than the water supply (so-called cross connection is prohibited). For this reason, it is necessary to form a space between the upstream pipe connected to the water supply pipe and the downstream pipe connected to the bathtub so that they do not come into direct contact with each other. In order to prevent the hot water from flowing backward from the bathtub side to the upstream water supply pipe side, there is a backflow prevention means such as a hopper device or an edge cutting unit in the series of flow paths from the external water supply source to the bathtub. Is formed.

  This backflow prevention means includes a structure that discharges the backflowed hot water to the outside when hot water flows back from the bathtub side. In other words, some heat source devices having an automatic bath drop function discharge hot water that has flowed back from the bathtub side to the outside as waste water.

  As described above, in the latent heat recovery type heat source machine, neutralized drain water, heat medium overflowing from the expansion tank, and other unnecessary water such as hot water flowing back from the bathtub side (hereinafter also simply referred to as unnecessary water). There is a structure that discharges to the outside. In general, the drain water and the waste water flow through the respective discharge paths, and then are discharged to the sewer pipes through the joining portions of the respective discharge paths formed on the downstream side.

JP 2011-179713 A

  By the way, the drainage standard of drain water generated by the heat source machine differs depending on the local government. In some regions, it is recognized that the neutralized drain water discharged from the heat source machine is drained not only to the sewer pipe but also to the rain pipe. That is, depending on the region, it is permitted to flow the neutralized drain water to the underground water channel for flowing rainwater.

  Therefore, when installing a heat source machine, depending on the installation environment in the area, etc., both drain water and waste water are discharged to the sewer pipe, and drain water and waste water are sent to the rain water pipe and sewer pipe respectively. Sometimes drained separately. That is, there are cases where the drain water discharge path and the waste water discharge path are merged on the downstream side, and where the drain water discharge path and the waste water discharge path are separated and connected to different pipes.

  By the way, the case where each discharge path is merged on the downstream side and the case where the drainage is performed separately are different in pipe joint members interposed between these discharge paths and the downstream pipe (rain water pipe or sewage pipe). Desired. That is, if the connection structure of the discharge path and the downstream pipe is different, a different pipe joint member is required accordingly.

  However, a structure in which a plurality of types of pipe joint members are manufactured and replaced in accordance with the installation environment of the heat source machine has a problem that the manufacturing cost is expensive. That is, the number of members to be manufactured is increased as compared with a structure using only one type of pipe joint member, and thus the manufacturing cost is high.

  In addition, only when pipe joint members are attached to the drain water discharge path and the waste water drain path, respectively, and when drain water and waste water are merged and discharged to the sewer, they are newly joined downstream of these pipe joint members. A structure of connecting a flow path forming member for use is conceivable. That is, only when the flow path forming member is additionally connected, the drain water drainage path and the waste water drainage path join at the downstream side of the pipe joint member attached to each.

  However, even in this structure, a separate pipe joint member is necessary for each of the drain water drainage path and the waste water drainage path, resulting in an increase in manufacturing cost. Further, when a flow path forming member is newly provided in addition to the pipe joint member, a space for installing the flow path forming member is required. This is not preferable because a larger space is required to install the heat source device. Furthermore, a flow path forming member must be additionally connected to the downstream side, and there is a problem that installation work by a contractor becomes complicated.

Therefore, the present invention can be used both in the case of draining drain water and other waste water separately and in the case of draining by joining, and switching between the state of draining separately and the state of draining by joining together. It is an object of the present invention to provide a pipe joint member that does not require complicated work.
Moreover, let it be a subject to provide the heat source machine which employ | adopted such a piping joint member.

  The invention according to claim 1 for solving the above-described problems includes a burner that generates a combustion gas obtained by burning fuel, a heat exchanger that recovers sensible heat and latent heat of the combustion gas, and an interior of the heat exchanger. And an internal flow path connected to the liquid flow path of the liquid, a drain discharge system for discharging the drain derived from the combustion gas to the outside, and waste water derived from the liquid that can pass through the internal flow path A pipe joint member provided in a heat source device having a waste water discharge system for discharging water to the outside, having two or more water inlets and two or more water outlets, from the water inlet to the drain outlet Two or more communication pipelines extending between the two or more, and having a bypass pathway connecting two or more of the communication pipelines and a ventilation channel communicating between the inside and the outside, wherein at least one of the communication pipelines is the water inlet The side is connected to the drain discharge system, The above-mentioned water inlets are located on the upper side, and two or more of the water outlets are located on the lower side, and the two or more water outlets are attached to the heat source unit in a state of being exposed to the outside of the casing. This is a pipe joint member.

The pipe joint member of the present invention has two or more water inlets and two or more water outlets, and two or more communication pipes connecting these water inlets and water outlets are provided. When two or more communication pipes are formed, at least one of the communication pipes is connected to the drain discharge system, and the other one of the communication pipes is discharged to discharge unnecessary water other than drain water. Can be connected to the grid. Thus, the neutralized drain water (hereinafter simply referred to as drainage) and other waste water (hereinafter simply referred to as drainage) can be drained separately.
The pipe joint member of the present invention has a bypass path that connects two or more of the communication pipes. For this reason, it can be set as the state which joins and drains several waste_water | drain (neutralized drain water and other unnecessary water) by the comparatively simple method of obstruct | occluding one or more drain outlets. That is, according to the pipe joint member of the present invention, it is possible to switch between a state in which drain water neutralized by a relatively simple method and other waste water are separately discharged and a state in which the drain water is joined and discharged.

This will be specifically described below.
In a situation where two or more communication pipelines extending from the water inlet to the water outlet are formed, if at least one of the water outlets is closed, two or more water inlets and one or more water outlets function. It becomes a state. That is, the drain outlets of one or more communication pipelines are closed. Then, in the communication pipe line where the drain port is not blocked, the waste water that has entered from the water inlet is discharged from the discharge port as before, but in the communication pipe line in which the drain port is blocked, the waste water that has entered the inlet line. Will not be discharged from the outlet. The waste water that has not been discharged from the discharge port stays in the communication pipe, flows in the communication pipe, and enters the bypass path connected to the other communication pipe. And the waste_water | drain which was not discharged | emitted from the discharge port will flow into another communication pipe line via a bypass path from the communication pipe line which infiltrated first. Furthermore, this waste water is discharged from the drain outlet of the communication pipe that has flowed in after passing through the bypass path. For this reason, in the communication pipe line connected to the communication pipe line with the drain outlet blocked, in addition to the waste water originally flowing through the communication pipe line, the waste water entering through the bypass flow path flows. That is, two kinds of drainage will merge in this communication pipe line.
Thus, in the pipe joint member of the present invention, it is possible to switch from a state in which a plurality of wastewaters are separately drained to a state in which they are joined and drained by a relatively simple method of closing the drainage port. Yes.

  Furthermore, in the pipe joint member of the present invention, two or more water inlets are located on the upper side and two or more water outlets are located on the lower side. For this reason, since the waste water that has entered from the water inlet flows to the drain outlet without any delay, the waste water does not stay unnecessarily inside. Therefore, in a state where a plurality of wastewaters are discharged separately, any one of the wastewaters does not intrude into the bypass path, and these do not mix. Therefore, it becomes possible to discharge individually reliably.

  Further, the pipe joint member of the present invention has an air passage communicating between the inside and the outside. For this reason, in the pipe continuous with the pipe joint member of the present invention, even if the inside of the pipe becomes negative pressure for some reason, air can be supplied into the pipe from the air passage. This can prevent problems that occur due to the negative pressure in the pipe, for example, a problem that the liquid flowing through the pipe flows backward. That is, by having an air passage, negative pressure destruction of the cross connection (air is taken into the pipe upstream of the pipe joint member from the air passage of the pipe joint member so that the bathtub water does not flow backward when water is shut off). It becomes possible. Thus, according to the pipe joint member of the present invention, the flow of the pipe continuous with the pipe joint member of the present invention can be further stabilized.

  According to a second aspect of the present invention, the vent path is branched from the bypass path and extends upward, and the opening portion is located outside the casing. It is a pipe joint member.

  In the present invention, since the ventilation path is branched from the bypass path and extends upward, even if drainage enters the ventilation path from the bypass path by mistake, the entered drainage is not discharged from the ventilation path. . That is, it is possible to prevent the drainage of the drainage from the ventilation path by making the ventilation path a structure in which liquid (drainage) does not flow from the bypass path side to the outside side.

  The invention according to claim 3 is the pipe joint member according to claim 1 or 2, wherein the communication pipe line is extended along a direction including a vertical direction component.

  According to such a configuration, the drainage flowing through the communication pipe can be flowed more smoothly. Therefore, it is possible to more reliably prevent the wastewater from staying in the interior unnecessarily, and it is possible to more reliably prevent the wastewater from entering the inappropriate bypass path.

  According to a fourth aspect of the present invention, a restricting means for restricting a flow of the liquid flowing through the communication pipe is formed in the vicinity of the bypass path, and the inlet to the drain of the communication pipe is provided. The pipe joint member according to any one of claims 1 to 3, wherein the flowing liquid is prevented from entering the bypass path by the restricting means.

  According to such a configuration, it is possible to further reliably prevent the drainage from entering the inappropriate bypass path by the regulating means.

  The invention according to claim 5 is characterized in that the pipe length of at least one of the communication pipes is longer than the pipe length of the other one of the communication pipes. It is a piping joint member of description.

Here, in a state where a plurality of drains are discharged separately, the pipes connected to the downstream side of the pipe joint member are also often separate. And when it is necessary to connect piping firmly with respect to a piping joint member, a thread may be formed in a piping coupling member and piping, and may be screwed together. In this case, it is necessary to tighten the pipe with a pipe wrench. That is, it may be necessary to perform an installation operation that is difficult to implement in a narrow space.
On the other hand, when connecting a pipe that does not need to be fixed so firmly, such as a hose, the end of the pipe joint member is inserted into the pipe to be connected, and these are clipped. In many cases, connection is performed without a work space.
Therefore, the pipe joint member of the present invention has a configuration in which the pipe length is different between the plurality of communication pipes. As a result, a pipe that needs to be relatively firmly fixed can be connected to a communication pipe having a long pipe length. In other words, only the pipe length of the communication pipe to be attached to the pipe to be firmly fixed is long, and the pipe lengths of other communication pipes located around the pipe can be shortened. Then, since the pipe line length of the communication pipe line located around the pipe to be firmly fixed is short, a wide space can be secured around the pipe to be firmly fixed. For this reason, it is possible to easily perform the work of attaching the pipes to be firmly fixed. In other words, piping connection work (for example, handling of piping tools such as a pipe wrench) that is firmly fixed by these other communication pipes is not hindered, and piping connection work is facilitated. In addition, if the pipe length of the communication pipe line is long, the contact portion between the communication pipe line and the pipe can be increased, so there is an advantage that the pipe joint member (communication pipe line) and the pipe can be more firmly fixed. .

  In the case of adopting such a configuration, the communication pipe line having a long pipe length is formed with a screw connection part for screwing and connecting a pipe, and the communication pipe line having a short pipe length is formed. Preferably, a hose end portion for connecting a flexible pipe such as a hose is formed.

  According to this configuration, the connection work between the communication pipe line and the pipe located on the downstream side is further facilitated.

  According to a seventh aspect of the present invention, the two communication pipes are each extended along a direction including a vertical direction component, and are arranged in parallel with a space between the two communication pipes. The bypass path extends along a direction including a horizontal component, the vent path is branched from the bypass path and extends upward, and the length of the diameter of the vent path is the extension direction of the bypass path The pipe joint member according to claim 1, wherein the pipe joint member is longer than the length of the pipe joint member.

According to such a configuration, the shape can be easily removed at the time of molding, so that the pipe joint member can be easily manufactured.
More specifically, the length of the diameter of the air passage is longer than the length of the bypass passage in the extending direction, and a relatively large space for forming the air passage can be secured. Thus, when the internal forming member for forming the internal shape of the pipe joint member is extracted from the inside of the pipe joint member, that is, at the time of mold release when forming the pipe joint member, the air passage is formed by the internal forming member. It can be used as a route for taking it out. That is, the internal forming member can be extracted using a wide space. As a result, the die cutting work at the time of molding becomes easy, and the manufacture of the pipe joint member can be simplified.

  The invention according to claim 8 is a heat source machine comprising the pipe joint member according to any one of claims 1 to 7.

A heat source machine according to the present invention includes the pipe joint member according to any one of claims 1 to 7. And as above-mentioned, this piping joint member can be switched comparatively easily from the state which drains several waste_water | drain separately to the state which joins and drains.
Therefore, the heat source machine of the present invention does not need to employ different pipe joint members for draining drain water and other waste water separately and for draining by joining them, and is highly versatile. Moreover, compared with the structure which uses two different pipe joint members according to a condition, it is only necessary to manufacture one type of pipe joint member, and the manufacturing cost can be reduced.
In addition, it is easy to switch from a state in which a plurality of wastewaters are drained separately to a state in which they are joined and drained, and even if a plurality of wastewaters are joined and drained, piping connection work is not complicated There are also advantages.

The pipe joint member of the present invention can be easily switched from a state in which neutralized drain water and other waste water are separately drained to a state in which they are joined and drained. Therefore, there is an effect that it is possible to provide a heat source device that is easy to install and has high versatility. In addition, the neutralized drain water and waste water can be combined and drained without adding a new member for forming a flow path, so that an advantage of not requiring a large space for installation There is also.
In addition, the heat source apparatus of the present invention provided with such a pipe joint member is different from a configuration using two different pipe joint members according to the state of drainage, and only one type of pipe joint member needs to be manufactured. Therefore, there is an effect that the manufacturing cost can be reduced. Further, as described above, it can be used in a situation where the neutralized drain water and other waste water are drained separately or in a situation where they are joined and drained.

It is an operation principle figure showing a heat source machine concerning an embodiment of the present invention. It is a perspective view which expands and shows the A section of FIG. It is a perspective view which shows the piping joint member of FIG. It is a perspective view which shows the state which looked at the piping joint member of FIG. 3 from the back side. It is a side view which shows the piping joint member of FIG. It is AA sectional drawing which shows the piping joint member of FIG. It is BB sectional drawing which shows the piping joint member of FIG. It is explanatory drawing which shows the state which discharges drain water and waste water separately, (a) shows the case where there exists a rainwater pipe and a sewer pipe in the vicinity of the installation position of a heat source machine, (b) shows the installation position of a heat source machine This shows the case where there is only a rainwater pipe in the vicinity of, and no sewage pipe. It is explanatory drawing which shows the state which makes drain water and waste water merge, and is discharged | emitted, (a) shows the case where a sewer pipe exists in the vicinity of the installation position of a heat source machine, (b) shows the installation position of a heat source machine. The case where there is no sewer pipe in the vicinity is shown. It is explanatory drawing which shows the flow of the liquid in the case of discharging | emitting separately the drain water neutralized and other unnecessary water by the piping joint member of FIG. It is explanatory drawing which shows the flow of the liquid in the case of making the drainage water and other waste water neutralized by the piping joint member of FIG. It is a perspective view which shows typically the state which looked at the pipe joint member different from FIG. 3 from the back side. It is a rear view which shows the piping joint member of FIG.

  Hereinafter, although the heat source machine 1 which concerns on embodiment of this invention is demonstrated, this invention is not limited to this. Further, in the following description, the front / rear / up / down / left / right positional relationship will be described based on a normal installation state unless otherwise specified.

  Prior to detailed description of the pipe joint member 60 which is a characteristic part of the present embodiment, a basic configuration of the heat source machine 1 to which the pipe joint member 60 is attached will be described.

  As shown in FIG. 1, the heat source device 1 of the present embodiment is formed by incorporating various devices and piping in a housing 2, and a combustion device 3 that burns combustion gas supplied from the outside, , A hot water supply system 4, a bath dropping system 5, a bath system 6, and a heating system 7. Here, in the hot water supply system 4, a general hot water supply operation in which hot water is discharged from the hot water tap 32 can be performed. Further, the bath dropping system 5 can perform an automatic dropping operation in which hot water is poured into the bathtub 45, and the bath system 6 can perform a reheating operation in which the hot water in the bathtub 45 is circulated and heated appropriately. It has become. And in the heating system 7, the heating operation which circulates hot water between external load apparatuses, such as an external fan convector and a floor heating appliance, can be implemented.

  As shown in FIG. 1, the combustion device 3 includes two independent can bodies and a piping system. That is, the right can body is used for general hot water supply operation and automatic dropping operation, and the left can body is used for reheating operation and heating operation. Each of the left and right cans includes a combustion unit 10, a blower 11 that supplies air to the combustion unit 10, combustion gas generated in the combustion unit 10, hot water, a heat medium, and the like (hereinafter also simply referred to as hot water). The heat exchange unit 12 (heat exchanger) that performs heat exchange and the exhaust unit 13 that discharges the combustion gas that has passed through the heat exchange unit 12 to the outside of the can body.

  And the space which connects each inside of the combustion part 10, the heat exchange part 12, and the exhaust part 13 is formed, and the combustion gas generated in the combustion part 10 can flow. Accordingly, when the combustion device 3 is operated, the combustion gas generated in the combustion unit 10 flows to the heat exchange unit 12 and reaches the exhaust unit 13. And it is discharged | emitted from the exhaust port of the exhaust part 13 outside.

  The combustion unit 10 includes a burner and is configured to generate high-temperature combustion gas by burning fuel such as gas or kerosene supplied from the outside.

  The heat exchanging unit 12 includes a primary heat exchanger 17 that mainly recovers sensible heat of the combustion gas, and a secondary heat exchanger 18 that mainly recovers the latent heat of the combustion gas.

  Here, in the secondary heat exchanger 18, the combustion gas recovered not only to sensible heat but also to latent heat becomes a low temperature, and water vapor contained in the combustion gas is liquefied to generate drain water. Since this drain water is exposed to combustion gas, it exhibits strong acidity. Therefore, the heat source apparatus 1 of the present embodiment is provided with a drain discharge system 20 for neutralizing acidic drain and discharging it to the outside.

  Next, each system of the heat source machine 1 will be described in detail.

As shown in FIG. 1, the hot water supply system 4 flows a part of hot water supplied from a water supply source (not shown) to the heat exchanging unit 12, and a general hot water supply pipe 28 and a bath dropping system 5 located on the downstream side. The hot water is supplied to the bath dropping pipe 35 (internal flow path).
The general hot water supply pipe 28 is a pipe that supplies hot water to the hot water tap 32 such as a shower or a currant.

  As shown in FIG. 1, the bath dropping system 5 is formed by a bath dropping pipe 35 and a bath return pipe 38 that forms a part of the bath system 6.

  The bath dropping pipe 35 is for flowing heated hot water to a bath return pipe 38 located on the bathtub 45 side. The bath drop pipe 35 is provided with a backflow prevention device 42.

The backflow prevention device 42 is a valve having a function of discharging hot water flowing in the reverse direction to the outside of the pipe. That is, the backflow prevention device 42 is connected to a backflow water discharge pipe 43 (unnecessary water discharge system) extending toward the outside of the housing 2, and hot water passing through a portion of the pipe provided with the backflow prevention device 42. Is configured to flow through the pipe when flowing in the forward direction, and to be discharged to the outside through the reverse water discharge pipe 43 when flowing in the reverse direction.
More specifically, when hot water in the bathtub 45 flows backward through the bath dropping pipe 35 at the time of water interruption or the like, when the backward flowing hot water reaches the backflow prevention device 42, the backflowed hot water flows back into the backflow water discharge pipe 43. Discharged from the outside. As a result, the hot water that has flowed back through the bath dropping pipe 35 is discharged to the outside.

  As shown in FIG. 1, the bath system 6 includes a bath return pipe 38, a bath outlet pipe 39, and a reheating heat exchanger 44. Is formed.

  The heating system 7 includes a circulation channel 46 (internal flow) through which an antifreeze as a heat medium flows between the heat exchange unit 12 of the combustion device 3 and a high temperature side heating terminal such as a bathroom dryer or a low temperature side heating terminal such as floor heating. Channel). The circulation channel 46 is provided with an expansion tank 48. Therefore, the antifreeze liquid overflowing from the circulation flow path 46 can be drained through the heat medium drain pipe 52.

  The drain discharge system 20 includes a neutralization device 56 and can neutralize drain water generated in the secondary heat exchanger 18. The drain water neutralized by the neutralization device 56 can be discharged to the outside through the drain discharge pipe 57.

  This is the end of the description of the basic configuration of the heat source device 1.

As described above, when the heat source apparatus 1 of the present embodiment is operated, the neutralized drain is discharged from the neutralization device 56 to the drain discharge pipe 57, flows through the drain discharge pipe 57, and is discharged to the outside. It will be. Moreover, the antifreezing liquid (heat medium) which became unnecessary from the expansion tank 48 of the heating system 7 may be discharged to the heat medium drain pipe 52 and may flow to the outside through the heat medium drain pipe 52.
In addition to this, as described above, when water breakage or the like occurs, the hot water in the bathtub 45 may flow backward through the bath dropping pipe 35, and the backflow water may reach the backflow prevention device 42. In this case, the backflow water is discharged from the backflow prevention device 42 to the backflow water discharge pipe 43, flows through the backflow water discharge pipe 43, and is discharged to the outside.

  Here, paying attention to the drain discharge pipe 57, the drain discharge pipe 57 extends from the drain discharge port of the neutralizing device 56 to the vicinity of the bottom plate portion 2 a of the housing 2. Further, when attention is paid to the heat medium drain pipe 52 and the backflow water discharge pipe 43, both the heat medium drain pipe 52 and the backflow water discharge pipe 43 are connected to the waste water discharge pipe 59 on the downstream side, and the waste water drain pipe 59. Extends to the bottom plate portion 2 a of the housing 2. Further, the drain discharge pipe 57 and the waste water discharge pipe 59 are continuous with a pipe or the like on the further downstream side (not shown in FIG. 1) located outside the housing 2 via the pipe joint member 60. .

  That is, as shown in FIGS. 1 and 2, the pipe joint member 60 is connected to the drain discharge pipe 57 and the waste water discharge pipe 59 located on the inner side of the casing 2 from the outside of the bottom plate portion 2 a of the casing 2. Installed. The flow path formed by the drain discharge pipe 57, the waste water discharge pipe 59, and the pipe joint member 60 passes through the bottom plate portion 2a of the housing 2 and extends in and out of the housing 2. It has become.

  The piping joint member 60 that is a characteristic part of the present embodiment will be described in detail below.

  As shown in FIGS. 3 and 4, the pipe joint member 60 has a first communication pipe 63 and a second communication pipe 64 each having a cylindrical shape with an upright outer shape, and the first communication pipe 63 and the second communication pipe 64 that are parallel to each other with a space therebetween. A bypass pipe 65 that is located between the communication pipe 63 and the second communication pipe 64 and connects them, and a ventilation pipe 66 that protrudes rearwardly upward from the outer peripheral surface of the bypass pipe 65 are integrally formed. It is a member for connecting piping to piping. More specifically, the pipe joint member 60 includes two pipes located on the upstream side (drain drain pipe 57 and waste water drain pipe 59, see FIG. 2), and two or one pipe located on the downstream side. It is for interposing between them.

  As shown in FIG. 3 and FIG. 4, the first communication pipe 63 extends along the vertical direction (vertical direction), and a portion slightly below the upper end of the first communication pipe 63 A flange portion 69 protruding outward from the outer peripheral surface of the first communication pipe 63 is formed. Further, a first pipe connection part 70 (screw connection part) for screwing and connecting the pipes is formed in the lower part of the first communication pipe 63.

  The flange portion 69 is formed integrally with the outer peripheral surface of the first communication pipe 63 and projects outward from the outer peripheral surface of the first communication pipe 63. The flange portion 69 has an annular shape in plan view and surrounds the first communication pipe 63 in an annular shape.

  The first pipe connection portion 70 is a screw thread (screw valley) extending in a spiral shape integrally formed on the outer peripheral surface (side surface) of the first communication pipe 63. Accordingly, the first communication pipe 63 can be connected by screwing a piping member having a thread formed on the inner peripheral surface of the inner hole.

As shown in FIGS. 3 and 4, the second communication pipe 64 extends along the vertical direction (vertical direction). That is, the second communication pipe 64 is a pipe body that extends in the same direction as the first communication pipe 63 described above, and is arranged with a space in the horizontal direction (left-right direction) with respect to the first communication pipe 63.
Here, when comparing the second communication pipe 64 and the first communication pipe 63, the length of the second communication pipe 64 in the longitudinal direction (vertical direction) is the length of the first communication pipe 63 in the longitudinal direction (vertical direction). It is shorter than that. In other words, the upper end of the second communication pipe 64 and the upper end of the first communication pipe 63 have the same position in the vertical direction (vertical direction), and the lower end of the second communication pipe 64 is the lower end of the first communication pipe 63. The position in the vertical direction (vertical direction) is higher.

  Further, a flange portion 72 that protrudes outward from the outer peripheral surface of the second communication pipe 64 is formed at a portion slightly below the upper end of the second communication pipe 64. In addition, a second pipe connection part 73 (hose end part) for connecting pipes is formed at a portion slightly above the lower end of the second communication pipe 64.

  The flange portion 72 is formed integrally with the outer peripheral surface of the second communication pipe 64 and projects outward from the outer peripheral surface of the second communication pipe 64. The flange portion 72 has an annular shape in plan view and surrounds the second communication pipe 64 in an annular shape.

  The 2nd piping connection part 73 is formed integrally with the outer peripheral surface of the 2nd communicating pipe 64, and is a protrusion-shaped part which rose from the circumference | surroundings so that it might protrude outward. And the part which rose like this mountain is continuing cyclically | annularly. In other words, the diameter of the portion where the second pipe connection portion 73 of the second communication pipe 64 is formed is larger than the diameter of the portion located around the second pipe connection portion 73. For this reason, when the lower end portion of the second communication pipe 64 is press-fitted into the inner hole of the flexible pipe such as a hose, the flexible pipe can be connected in a state in which it is difficult to remove from the second communication pipe 64.

As shown in FIGS. 3 and 4, the bypass pipe 65 is a cylindrical portion that is laid down and extends in the left-right direction (one direction in the horizontal direction). One end of the bypass pipe 65 in the longitudinal direction (left-right direction) is continuous with the first communication pipe 63, and the other end is continuous with the second communication pipe 64. That is, the bypass pipe 65 intersects the first communication pipe 63 and the second communication pipe 64 substantially vertically. More specifically, the bypass pipe 65 is continuous with each of the opposing portions of the side surface of the first communication pipe 63 and the side surface of the second communication pipe 64.
Here, the bypass pipe 65 is continuous with a portion of the side surface of the first communication pipe 63 that is below the flange portion 69 and located near the center in the longitudinal direction (vertical direction) of the first communication pipe 63. It has become a state. The bypass pipe 65 is continuous with a portion of the side surface of the second communication pipe 64 that is located below the flange portion 72 and located at the lower end in the longitudinal direction (vertical direction) of the second communication pipe 64. It is in a state.

  As shown in FIGS. 4 and 5, the ventilation pipe 66 is a substantially cylindrical portion having an outer shape protruding from the upper side surface of the bypass pipe 65 toward the upper rear side. Here, as shown in FIG. 5, the upper end surface 76 of the ventilation pipe 66 is a horizontal plane. That is, the vent pipe 66 protrudes in a direction oblique to the horizontal plane, and has a shape as if the protruding end portion was cut off horizontally. In other words, it can be said that the vent pipe 66 has a cylindrical shape in which one end portion in the longitudinal direction is cut off obliquely.

  Next, the internal structure of the pipe joint member 60 will be described.

As shown in FIG. 6, the first communication pipe 63 is provided between a first water inlet 79 (water inlet) formed on the upper end surface and a first water outlet 80 (drain port) formed on the lower end surface. A first flow passage 81 (communication conduit) extending through the first communication tube 63 in the longitudinal direction is formed. In addition, the first water inlet 79 and the first water outlet 80 have a circular opening shape (see FIGS. 3 and 4 for the first water inlet 79, and the entire outer shape of the first water outlet 80 is not shown). It has become.
That is, the first flow passage 81 that is an inner hole formed in the first communication pipe 63 has an upper and lower ends that are open to the outside, a cross-sectional shape that is substantially circular, and extends in the vertical direction (vertical direction). Road.

As shown in FIG. 6, the second communication pipe 64 is provided between a second water inlet 84 (water inlet) formed on the upper end surface and a second water outlet 85 (drain port) formed on the lower end surface. A second flow passage 86 (communication conduit) extending through the second communication pipe 64 in the longitudinal direction is formed. In addition, the second water inlet 84 and the second water outlet 85 have a circular opening shape (see FIGS. 3 and 4 for the second water inlet 84, and the entire outer shape of the second water outlet 85 is not shown). It has become.
That is, the second flow passage 86, which is an inner hole formed inside the second communication pipe 64, has upper and lower ends opened to the outside, and has a substantially circular cross-sectional shape extending in the vertical direction (vertical direction). Road.

As shown in FIG. 6, a bypass flow path 89 (bypass path) extending through the bypass pipe 65 in the longitudinal direction is formed in the bypass pipe 65. The bypass flow passage 89 is continuous with the first flow passage 81 at one end portion in the longitudinal direction, and is continuous with the second flow passage 86 at the other end portion.
That is, the bypass flow passage 89 has one of the left and right ends opened to the first flow passage 81 and the other opened to the second flow passage 86. The bypass flow passage 89 is a flow path that is substantially circular in cross section and extends in the horizontal direction (left-right direction).

  Here, paying attention to both ends of the bypass flow passage 89 in the longitudinal direction, protrusions (protrusions 91 and 92) are formed at portions located above the respective ends.

One protrusion 91 (regulating means) is formed inside the first communication pipe 63 (first flow passage 81), and is a protrusion protruding inward from the inner peripheral surface of the first flow passage 81. is there. More specifically, the protrusion 91 has a cross-sectional shape bent in a bowl shape. That is, the base end portion of the protrusion 91 protrudes obliquely downward, and the protrusion end portion of the protrusion 91 protrudes downward.
And this projection part 91 is provided only in the circumferential direction and a part of radial direction (right side part in FIG. 6) of the internal peripheral surface of the 1st communicating pipe 63. As shown in FIG. Therefore, in the part (left side part in FIG. 6) adjacent to the protrusion 91 of the first flow passage 81, the liquid can be circulated in the vertical direction.

  Further, the upper surface 91 a of the protrusion 91 is an inclined surface whose height decreases toward the inside of the first communication pipe 63. In other words, the upper surface 91a of the protrusion 91 is an inclined surface that is inclined downward toward the inside of the first communication pipe 63 (the center side of the horizontal section).

The other projection 92 (regulating means) is formed inside the second communication pipe 64 (second flow passage 86), and is a projection protruding inward from the inner peripheral surface of the second flow passage 86. is there. More specifically, the protrusion 92 has a cross-sectional shape bent in a bowl shape. That is, the base end portion of the protrusion 92 protrudes obliquely downward, and the protrusion end portion of the protrusion 92 protrudes downward.
And this projection part 92 is provided only in the circumferential direction and a part of radial direction (right side part in FIG. 6) of the internal peripheral surface of the 2nd communicating pipe 64. As shown in FIG. Therefore, in the part (right side part in FIG. 6) adjacent to the protrusion 91 of the second flow passage 86, the liquid can flow in the vertical direction.

  Further, the upper surface 92 a of the projection 92 is an inclined surface whose height decreases as it goes inward of the second communication pipe 64. In other words, the upper surface 92a of the protrusion 92 is an inclined surface that is inclined downward toward the inner side of the second communication pipe 64 (the center side of the horizontal section).

  As shown in FIG. 7, the ventilation pipe 66 has an internal opening 95 that faces the bypass flow passage 89 that is an internal space of the bypass pipe 65, and an opening that is formed on the upper end surface 76 that is a protruding end of the ventilation pipe 66. A ventilation passage 97 extending through the ventilation pipe 66 in the longitudinal direction is formed between the intake and exhaust port 96. That is, the ventilation path 97 is a space formed inside the ventilation pipe 66 that protrudes rearward and upward from the bypass pipe 65, and is a space for communicating the internal space of the pipe joint member 60 with the outside. . Further, the opening shape of the internal opening 95 (not shown for the entire shape as viewed from the front) and the intake / exhaust port 96 (see FIG. 4) is circular.

By the way, as described above, the upper end surface 76 of the vent pipe 66 is a horizontal plane. Therefore, the intake / exhaust port 96 formed in the upper end surface 76 is open upward.
As shown in FIG. 5, the upper end surface 76 of the ventilation pipe 66 has a vertical position at the flange 72 of the second communication pipe 64 (and the flange 69 of the first communication pipe 63 not shown in FIG. 5). ) Is slightly below the upper end surface. More specifically, the distance 1 in the height direction (vertical direction) from the upper end portion of the flange portion 72 to the upper end surface 76 of the vent pipe 66 is sufficiently short (for example, about 7 mm). Here, when the pipe joint member 60 is attached to the housing 2 (when it is in the state as shown in FIG. 2), the lower surface of the bottom plate portion 2a of the housing 2 is at the height h1 where the upper end portion of the flange portion 72 is located. Will be located. That is, when the pipe joint member 60 is attached to the housing 2, the upper end surface 76 of the vent pipe 66 is positioned on the lower side by a predetermined distance 1 from the lower surface of the bottom plate portion 2 a. In other words, the lower surface of the bottom plate portion 2a and the upper end surface 76 of the vent pipe 66 are opposed to each other in the vertical direction with a slight gap. Therefore, the intake / exhaust port 96 (see FIG. 4) formed in the upper end surface 76 of the vent pipe 66 is also in a state of facing the lower surface of the bottom plate portion 2a.

  That is, in the pipe joint member 60 of the present embodiment, when attached to the housing 2, the intake / exhaust port 96 of the vent pipe 66 is located slightly below the lower surface of the bottom plate portion 2a, and the lower surface side of the bottom plate portion 2a. It is in a state facing. In other words, there is a slight gap between the intake / exhaust port 96 and the lower surface of the bottom plate portion 2a, and the intake / exhaust port 96 faces the housing 2 side. If the intake / exhaust port 96 of the vent pipe 66 is provided at such a position, even if the intake / exhaust of air is enabled between the internal space of the pipe joint member 60 and the outside of the housing 2, It is preferable because dust, dust and the like hardly enter the pipe joint member 60 from the port 96. That is, by providing the intake / exhaust port 96 at such a position, fine dust such as dust and dirt does not enter the pipe joint member 60, and continues to the pipe joint member 60 and the pipe joint member 60. Piping can be made hard to clog.

  Subsequently, by the pipe joint member 60 of the present embodiment, neutralized drain water and waste water (unnecessary antifreeze liquid and backflow water) are discharged separately to the downstream side, and merged and discharged downstream. Each case will be described.

As described above, depending on the area where the heat source device 1 is installed, there are cases where discharge of neutralized drain water to the rainwater pipe is permitted and cases where discharge of neutralized drain water to the rainwater pipe is not permitted. . In addition to this, the drain water and waste water discharge structures generated in the heat source unit 1 are different due to the difference in the environment of the installation location of the heat source unit 1.
Hereinafter, the difference in the drain structure of the drain water and waste water which generate | occur | produce with the heat-source equipment 1 is demonstrated.

  First, the case where neutralized drain water may be discharged to the rainwater pipe will be described.

  When there is a rainwater pipe or a groove (or pipe) connected to the rainwater pipe near the position where the heat source unit 1 is planned to be installed, and there is a sewage pipe (or pipe connected to the sewage pipe), as shown in FIG. The neutralized drain water is discharged to the rainwater pipe side, and the waste water is discharged to the sewer pipe. In this case, a pipe connected to the rainwater pipe is connected to the first communication pipe 63, and a pipe connected to the sewer pipe is connected to the second communication pipe 64.

  On the other hand, when there is a rainwater pipe or a groove (or a pipe) connected to the rainwater pipe near the planned installation position of the heat source unit 1, but there is no sewage pipe (or a pipe connected to the sewage pipe), it is shown in FIG. As such, the neutralized drain water is discharged to the rainwater pipe side, and the waste water is discharged to the drainage container. That is, waste water is temporarily stored in a drainage container and then discarded to an appropriate place. In this case, a pipe connected to the rainwater pipe is connected to the first communication pipe 63, and a pipe connected to the drainage container is connected to the second communication pipe 64, or the lower end of the second communication pipe 64 is connected without connecting the pipe. Is in an open state.

  In addition, if there is no rainwater pipe (pipe connected to the rainwater pipe) or a groove near the planned installation position of the heat source unit 1, the neutralized drain water and waste water are used even if the neutralized drain is allowed to be discharged into the rainwater pipe. Are discharged into the sewer pipe. That is, as shown in FIG. 9A, the lower end portion of an appropriate communication pipe (second communication pipe 64) is closed, and a communication pipe (first communication pipe 64) different from the closed communication pipe (second communication pipe 64). The drain water neutralized by the one communication pipe 63) and the waste water are merged and then discharged downstream. In this case, a pipe connected to the sewage pipe is connected to the communication pipe (first communication pipe 63) where drain water and waste water merge, and the second communication pipe 64 is a rubber cap for closing the open portion on the lower end side. A lid member 99 such as is attached.

  Then, the case where discharge | release to the rainwater pipe | tube of neutralized drain water is not recognized is demonstrated. In this case, the discharge structure differs depending on whether or not there is a sewage pipe (or a pipe connected to the sewage pipe) in the vicinity of the planned installation position of the heat source device 1.

  When there is a sewage pipe (or a pipe connected to the sewage pipe) near the planned installation position of the heat source unit 1, as shown in FIG. 9A, the lower end portion of the appropriate communication pipe (second communication pipe 64) is Block. The drain water neutralized by the communication pipe (first communication pipe 63) different from the closed communication pipe (second communication pipe 64) and the waste water are merged and then discharged to the sewer pipe. In this case, a pipe connected to the sewer pipe is connected to the communication pipe (first communication pipe 63) where the drain water and the waste water merge. Then, a lid member 99 such as a rubber cap for closing the open portion on the lower end side is attached to the closed communication pipe (second communication pipe 64).

  When there is no sewage pipe (or a pipe connected to the sewage pipe) near the planned installation position of the heat source unit 1, as shown in FIG. 9B, the lower end portion of the appropriate communication pipe (second communication pipe 64) is Block. Then, the drain water neutralized by the communication pipe (first communication pipe 63) different from the closed communication pipe (second communication pipe 64) and the waste water are merged and then discharged to the drainage container. In this case, a pipe connected to the drainage container is connected to the communication pipe (first communication pipe 63) where the drain water and the waste water merge, or the lower end is opened without connecting the pipe. Then, a lid member 99 such as a rubber cap for closing the open part on the lower end side is attached to the closed communication pipe (second communication pipe 64).

As described above, the heat source unit 1 is used to discharge the neutralized drain water and the waste water separately to the downstream side due to the difference in the discharge regulations of the installation area or the environment of the installation place. May be discharged downstream.
In the pipe joint member 60 of the present embodiment, the drain water and the waste water are separately discharged only by closing any one of the communication pipes (the first communication pipe 63 and the second communication pipe 64) with the lid member 99. And it is possible to switch between a state in which drain water and waste water are combined and discharged. In other words, in the pipe joint member 60 of the present embodiment, it is possible to switch between a state in which a plurality of drains are separately discharged and a state in which they are merged by a simple operation of attaching the lid member 99, which is complicated for switching. Work is not required.

  Hereinafter, the case where the neutralized drain water and the waste water are separately discharged to the downstream side and the case where they are joined and discharged to the downstream side will be specifically described.

  First, when discharging the neutralized drain water and waste water separately to the downstream side, as shown in FIG. 10, the downstream side of each communication pipe (the first communication pipe 63 and the second communication pipe 64). Install piping separately. Then, the drain water that has entered the first flow path 81 from the first water inlet 79 of the first communication pipe 63 is discharged from the first water outlet 80 into the downstream pipe as it is. Similarly, waste water that has entered the second flow passage 86 from the second water inlet 84 of the second communication pipe 64 is discharged from the second drain 85 into the downstream pipe as it is.

  Here, as described above, the protrusion 91 is formed in the first flow path 81 which is the inside of the first communication pipe 63. Further, the protruding portion 91 is provided at one end portion in the longitudinal direction of the bypass flow passage 89, that is, immediately above the end portion on the first flow passage 81 side (position close to the upper side). The upper surface 91 a of the protrusion 91 has a downward slope in a direction away from the bypass flow passage 89.

As a result, even when drain water flowing from the first water inlet 79 into the first flow path 81 and flowing downward flows in a position close to the bypass flow path 89, the drain water is bypassed by the bypass flow path 89. There is no intrusion.
More specifically, when drain water flows through a position close to the bypass flow path 89 in the first flow path 81, the drain water comes into contact with the upper surface 91 a of the protrusion 91. That is, the drain water falls to the upper surface 91 a of the protrusion 91 or flows along the inner wall of the first communication pipe 63 and reaches the upper surface 91 a of the protrusion 91. Then, since the upper surface 91 a of the protrusion 91 has a downward slope in a direction away from the bypass flow passage 89, the drain water flowing through the upper surface 91 a of the protrusion 91 flows in a direction away from the bypass flow passage 89. . After that, it falls downward at a position away from the bypass flow passage 89.
As described above, in the pipe joint member 60 of the present embodiment, the flow direction of the drain water flowing near the bypass flow passage 89 is changed by the protrusions 91, and downwards at a position away from the bypass flow passage 89. It is configured to fall. As a result, it is possible to prevent drain water from entering the bypass flow passage 89.

Similarly, in the second communication pipe 64, a protrusion 92 is formed in the second flow passage 86, and unnecessary water flowing from the second water inlet 84 to the second flow passage 86 and flowing downward is bypassed. There is no entry into the flow path 89.
That is, in the pipe joint member 60 of the present embodiment, when drain water and waste water are separately discharged to the downstream side, drain water that flows through separate communication pipes (the first communication pipe 63 and the second communication pipe 64), respectively. And unnecessary water do not accidentally enter the bypass flow passage 89. In other words, drain water and waste water are not mixed by mistake.

  Subsequently, when the neutralized drain water and waste water are merged and discharged downstream, as shown in FIG. 11, among the plurality of communication pipes (first communication pipe 63 and second communication pipe 64). The one or more communication pipes (second communication pipe 64) are closed by the lid member 99. In this state, drain water flows from the first water inlet 79 of the first communication pipe 63 into the first flow path 81 and waste water flows from the second water inlet 84 of the second communication pipe 64 into the second flow path 86. Let Then, as shown in FIG. 11A, the drain water that has entered the first flow path 81 is directly discharged from the first drain port 80 into the downstream pipe. On the other hand, the waste water that has entered the second flow passage 86 is stored on the upper side of the lid member 99. More specifically, the waste water is stored in the lower end side of the second communication pipe 64 and located below the bypass pipe 65.

  If drain water and waste water continue to flow in as they are, the level of waste water stored at the lower end side of the second communication pipe 64 will rise. Then, as shown in FIG. 11B, when the stored unused water level exceeds the lower end of the bypass flow passage 89, the stored waste water flows into the bypass flow passage 89.

  Here, the protrusion 92 is provided on the upper side of the bypass flow passage 89, and does not hinder the flow of unnecessary water entering from the lower side of the bypass flow passage 89. That is, the protrusion 92 (protrusion 91) prevents intrusion of unnecessary water (drain water) from the second water inlet 84 (first water inlet 79) side downward into the bypass flow passage 89, and It is formed so as not to hinder the intrusion of unnecessary water (drain water) heading upward from the second drain port 85 (first drain port 80) side into the bypass flow passage 89.

  The vent pipe 66 protrudes from the upper side of the bypass pipe 65 toward the upper rear side, and the inner opening 95 of the vent pipe 66 opens above the bypass flow passage 89. Therefore, waste water (drain water) flowing under the bypass flow passage 89 does not flow from the internal opening 95 into the ventilation pipe 66 (the ventilation path 97, see FIG. 7). Further, since the vent pipe 66 protrudes rearward and upward (in the direction including the upper component), even if unnecessary water (drain water) flows into the vent pipe 66 from the inner opening 95, the vent pipe 66 is externally provided. It is structured so that it is not discharged.

  As shown in FIG. 11B, the waste water flowing from the second flow path 86 (second communication pipe 64) into the bypass flow path 89 is removed from the first flow path 81 (first communication pipe 63). Is discharged. As a result, the drain water and the waste water are merged in the first flow passage 81 (first communication pipe 63) and discharged from the first drain port 80 of the first communication pipe 63 to the downstream pipe.

  As described above, the pipe joint member 60 of the present embodiment is provided with the vent pipe 66, and the internal space of the pipe joint member 60 and the outside are in communication with each other. Therefore, even if the inside of the pipe connected to the water supply source has a negative pressure due to the occurrence of water breakage or the like, the air taken into the pipe joint member 60 from the vent pipe 66 has become a negative pressure. Can be supplied into the piping. That is, air can be supplied to the inside of the pipe that has become negative pressure through the inside of the pipe joint member 60 and the inside of the pipe continuous with the pipe joint member 60. As a result, even if the inside of the pipe has a negative pressure on the water supply source side, it is possible to prevent the occurrence of problems due to this.

In the above-described embodiment, the case where the length in the left-right direction of the bypass pipe 65 (bypass flow passage 89) is longer than the length in the diameter (width) direction of the vent pipe 66 has been described. However, when the pipe joint member of the present invention is actually manufactured, the length in the diameter (width) direction of the vent pipe 66 is preferably longer than the length in the left-right direction of the bypass pipe 65 (bypass flow passage 89).
More specifically, as shown in FIGS. 12 and 13, the first communication pipe 63, the second communication pipe 64, the bypass pipe 265, and the ventilation pipe 266 have the same diameter or substantially the same diameter. The length L3 (see FIG. 13) of the diameter (width) of the vent pipe 266 is preferably longer than the length L2 in the longitudinal direction (see FIG. 13).
And when the pipe joint member 200 has such a shape, there is an advantage that even if the internal space of the pipe joint member 200 has a complicated shape, a molding operation at the time of manufacture can be easily performed. This will be specifically described below.

More specifically, in the pipe joint member 200 having such a shape, it is possible to ensure a relatively wide space formed inside the bypass pipe 265 and the vent pipe 266.
Here, when the pipe joint member 200 is manufactured by processing the resin by an appropriate molding method, a member for forming an internal shape inside the pipe joint member 200 (hereinafter referred to as an internal forming member) is formed at the time of molding. Molding will be carried out while being placed inside. For this reason, when the molding of the pipe joint member 200 is completed, it is necessary to take out the inner forming member from the inside of the pipe joint member 200 to the outside.
Therefore, when a large space can be secured inside the bypass pipe 265 and the vent pipe 266, this space can be used as a space for taking out the internal forming member to the outside. Since it can be taken out, it is easy to take out the internal forming member. Thereby, manufacture of a pipe joint member can be simplified.

  In the above-described embodiment, the communication pipe (the first communication pipe 63, the second communication pipe 64), the water inlet (the first water inlet 79, the second water inlet 84), the outlet (the first water outlet 80, the second water drain). Although the pipe joint member 60 provided with two each of the ports 85) has been described as an example, the present invention is not limited to this. Three or more of these communication pipes, water inlets, and outlets may be provided. Further, the number of communication pipes, water inlets, and outlets may be the same or different. Furthermore, the structure which provides two or more bypass pipes may be sufficient. By closing one end side of any one or more communication pipes, drain water or waste water flowing through the closed communication pipes may flow into other communication pipes.

In the above-described embodiment, an example in which the drain discharge pipe 57 is connected to the first communication pipe 63 and the unnecessary water discharge pipe 59 is connected to the second communication pipe 64 is shown, but the present invention is not limited to this. An unnecessary water discharge pipe may be connected to the first communication pipe, and a drain discharge pipe may be connected to the second communication pipe.
And in the above-mentioned embodiment, although the 2nd communication pipe was obstruct | occluded and the example which joins drain water and waste water with a 1st communication pipe was shown, this invention is not limited to this, A 1st communication pipe is connected. The drain water and the waste water may be merged through the second communication pipe after closing. In connection with this, the structure which connects a 2nd communicating pipe to a sewer pipe may be sufficient. In other words, the first communication pipe may be connected to the rainwater pipe, and the second communication pipe may be connected to the sewer pipe.

  Further, in the above-described embodiment, an example in which the length of the first communication pipe is longer than that of the second communication pipe is shown, but the present invention is not limited to this, and the length of the second communication pipe is the first communication pipe. It may be the same as the pipe or may be longer than the first communication pipe. In connection with this, a 2nd piping connection part may be formed in the 1st communicating pipe side, and a 1st piping connection part may be formed in the 2nd communicating pipe side. In addition, the first communication pipe or the second communication pipe may or may not be formed with a pipe connection portion for connecting a downstream pipe.

  In the above-described embodiment, the example in which the flange portions (the flange portion 69 and the flange portion 72) are separately formed in the first communication pipe 63 and the second communication pipe 64 has been described, but the present invention is not limited to this. For example, the flange of the first communication pipe and the flange of the second communication pipe may be formed integrally, or may have a shape in which two communication pipes penetrate one oval plate-like portion. Then, an attachment hole for attaching a pipe joint member to the bottom plate portion of the housing, that is, an attachment hole for inserting a fastening member such as a screw may be formed in the plate-like portion. This attachment hole may be formed in any part of the plate-like part, for example, may be formed in a part located between two communication pipes.

  Moreover, it is easy to attach upstream pipes (drain discharge pipe 57 and waste water discharge pipe 59) above the flange parts (flange part 69, flange part 72) of the first communication pipe 63 and the second communication pipe 64. You may process as follows. That is, the first pipe connection part 70 and the second pipe connection part 73 described above may be formed near the upper end of the first communication pipe 63 or the second communication pipe 64.

DESCRIPTION OF SYMBOLS 1 Heat source machine 2 Case 12 Heat exchange part (heat exchanger)
20 Drain discharge system 35 Bath drop pipe (internal flow path)
43 Backflow water discharge piping (unused water discharge system)
46 Circulation channel (internal channel)
52 Heat transfer drain (unused water discharge system)
60 Piping joint member 70 1st piping connection part (screwing connection part)
73 Second piping connection (hose end)
79 First water inlet (water inlet)
80 First drain (drain)
81 1st flow passage (communication pipeline)
84 Second water inlet (water inlet)
85 Second drainage port (drainage port)
86 Second flow passage (communication pipeline)
89 Bypass passage (bypass route)
91 Protrusion (regulation means)
92 Protrusion (regulation means)
97 Airway

Claims (8)

The casing includes a burner that generates combustion gas that burns fuel, a heat exchanger that recovers sensible heat and latent heat of the combustion gas, and an internal flow path that leads to a liquid flow path in the heat exchanger. , A heat source device having a drain discharge system for discharging drain derived from the combustion gas to the outside, and a waste water discharge system for discharging waste water derived from the liquid that can pass through the internal flow path to the outside A pipe joint member provided in
Two or more water inlets and two or more water outlets, two or more communication pipes extending from the water inlet to the water outlet are provided,
A bypass path connecting two or more of the communication pipes, and a ventilation path communicating inside and outside,
At least one of the communication pipes is one in which the water inlet side is connected to the drain discharge system,
The two or more water inlets are located on the upper side, the two or more water outlets are located on the lower side, and the two or more water outlets are attached to the heat source unit so as to be exposed to the outside of the housing. A pipe joint member.   2. The pipe joint member according to claim 1, wherein the ventilation path is branched from the bypass path and extends upward, and the opening portion is located outside the housing.   The pipe joint member according to claim 1, wherein the communication pipe line is extended along a direction including a vertical direction component. In the vicinity of the bypass path, a regulation means for regulating the flow of the liquid flowing through the communication pipe line is formed,
The pipe joint member according to any one of claims 1 to 3, wherein the liquid flowing from the water inlet to the water outlet of the communication pipe is prevented from entering the bypass path by the restricting means.   The pipe joint member according to any one of claims 1 to 4, wherein a pipe length of at least one of the communication pipe lines is longer than a pipe length of the other one of the communication pipe lines. In the communication pipe line having a long pipe length, a screw connection part for screwing and connecting the pipe is formed,
The pipe joint member according to claim 5, wherein a hose end portion for connecting a flexible pipe such as a hose is formed in the communication pipe line having a short pipe length. The two communication pipes are each extended along a direction including a vertical direction component, and are arranged in parallel with a gap therebetween,
Between the two communication pipes, the bypass path is extended along a direction including a horizontal component,
The ventilation path is branched from the bypass path and extends upward,
The pipe joint member according to any one of claims 1 to 6, wherein the length of the diameter of the air passage is longer than the length of the bypass passage in the extending direction.   A heat source machine comprising the pipe joint member according to any one of claims 1 to 7.

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