JP3928549B2 - Combined heat source machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a combined heat source machine having a hot water circulation heating function and a reheating and heating function for a hot water bath that uses the circulated hot water as a heat source, and a header for distributing and collecting hot water to a heating terminal is provided in the housing. Related to the built-in.
[0002]
[Prior art]
  Conventionally, as a composite heat source machine, a central heater in which three types of headers, namely, a high-temperature terminal forward header, a floor heating forward header with a thermal valve, and a high-temperature terminal and a return header for floor heating are built in the inner bottom of the housing. A heat source machine for the lighting is proposed (see, for example, Patent Document 1). The connection described in Patent Document 1 is connected as follows. That is, the outlet side of the heat exchanger for heating is connected to the high temperature terminal forward header, and a pipe extending to the high temperature terminal such as a fan convector is connected to the high temperature terminal forward header. A pipe for returning the hot water that has been radiated at the high temperature terminal and returned to a low temperature is connected to the return header, and the return header is connected to the systern to return the low temperature water to the systern. The low temperature water is returned and circulated from the systern by the circulation pump to the water inlet side of the heat exchanger, while the low temperature water is branched downstream of the circulation pump, and the low temperature water passes through the floor heating forward header with the thermal valve. After being supplied to the floor heater (low temperature terminal), the low temperature terminal returns to the systern via the return header.
[0003]
  On the other hand, in the composite heat source machine having a hot water circulation heating function, the following configuration is usually adopted. For example, a composite heat source machine having a hot water supply function, a hot water circulation heating function and a reheating circulation heating function as shown in FIG. 7 includes a hot water supply circuit 50, a heating circuit 60 and a reheating circuit 70. Then, the high-temperature water heated by the heating heat exchanger 610 on the heating circuit 60 passes through the high-temperature forward conduit 670 and the high-temperature forward header component H of the heating circuit 60 to the high-temperature terminals 2 and 2 for heating (see FIG. 8). The supplied low-temperature water after heat dissipation is returned to the expansion tank 640 through the low-temperature return header R and the tank return pipe 690. The low-temperature water in the expansion tank 640 is reheated and circulated by the circulation heat pump 610 through the low-temperature return pipe 660 by the circulation pump 650 and is branched from the downstream side position of the circulation pump 650 to the branch low-temperature pipe 680. The low-temperature water is distributed by the low-temperature forward header L with a thermal valve for the low-temperature terminal 3 and supplied to the various low-temperature terminals 3 and 3, and the low-temperature water after heat radiation is supplied to the low-temperature return header R and the tank return pipe 690. Through the expansion tank 640. Also provided is a bypass line 700 for returning the high-temperature water discharged from the high-temperature forward line 670 directly to the expansion tank 640 in case the high-temperature terminal 2 is OFF and only the low-temperature terminal 3 is ON. Yes. On the other hand, high-temperature water branched from the high-temperature forward pipe 670 to the branch high-temperature pipe 701 is supplied to the reheating liquid-liquid heat exchanger 710, and the bathtub supplied to the heat exchanger 710 by forced circulation. The internal hot water is reheated by liquid-liquid heat exchange using the high-temperature water as a heating source.
[0004]
  In this case, as shown in FIG. 9, the low-temperature header L with a thermal valve is installed on the inner bottom 901 of the housing 900 of the composite heat source machine, and each distribution connection port is exposed to the outside. The first connection plug 671 at the downstream end of the high-temperature forward conduit 670 and the second connection plug 691 at the upstream end of the tank return conduit 690 are installed on the inner bottom 901 of the housing 900 in the same manner as described above. The connection port is exposed to the outside and is shipped as a product in this state. Then, the following connection work is performed at the installation site of the composite heat source machine. That is, each upstream end of the low-temperature forward pipe 31 extending to the low-temperature terminal 3 is directly connected to the distribution connection port of the low-temperature forward header L with a thermal valve. On the other hand, as shown in FIG. 10, for the connection ports of the first and second connection plugs 671, 691, first, the high temperature forward header part H and the low temperature return side header part R are connected to the housing. The high-temperature forward header part H is attached to the 900 from the outside, and the low-temperature return header part R is connected to the second connection plug 691 in communication with the first connection plug 671. In other words, although the low-temperature forward header L with a thermal valve is shipped in a state incorporated in the housing 900 of the composite heat source machine, the high-temperature forward header component H and the low-temperature return header component R are removed by field work at the installation site. It has come to be attached. Thereafter, a predetermined piping connection operation is performed on these two header parts H and R.
[0005]
  The pipe connection work will be described in more detail. One end of the pipe joint member 15 (see FIG. 10) is connected to the connection port of the high-temperature forward header part H (for example, press-fit connection), and the other end is hot. The upstream end of the high temperature forward pipe 21 (see FIG. 8) extending to the terminal 2 is connected (for example, press-fit connection). That is, the connection port of the high temperature forward header part H and the high temperature forward piping 21 are connected to each other via the pipe joint member 15. Then, a closing plug 16 is connected to the unused connection port (for example, press-fit connection) to be closed. In addition, the return pipes 22 and 32 are connected to the connection ports of the low temperature return side header part R using the pipe joint member 15 in the same manner as described above.
[0006]
[Patent Document 1]
          JP-A-7-83452
[0007]
[Problems to be solved by the invention]
  However, in the conventional composite heat source apparatus, when there are two types of heating terminals, a high-temperature terminal and a low-temperature terminal, a low-temperature forward header with a thermal valve, a high-temperature forward header (or header component), and a low-temperature return header (or 3 types of headers (header parts) are required, and the production of these headers themselves and the respective assembly operations become complicated, resulting in an increase in cost.
[0008]
  In addition, if the above three types of headers are built in the housing of the composite heat source machine as described in the above-mentioned Patent Document 1, the housing will be enlarged in order to secure the installation space. In addition, the degree of freedom of pipe arrangement in the housing is limited. On the other hand, as shown in FIGS. 9 and 10, when the high-temperature forward header part H and the low-temperature return-side header part R are retrofitted outside the housing in the field work, the header parts H and R are arranged and installed on the field.WorkThis requires labor and labor for the work.
[0009]
  On the other hand, if the composite heat source machine has a recirculation heating function that uses hot water for heating as a heat source as shown in FIG. 7 above, the high-temperature water discharged from the heat exchanger 610 to the high-temperature forward pipe 670 It is necessary to branch to the liquid-liquid heat exchanger 710 by branching through the branch high-temperature pipe line 701, and the pipe arrangement in the housing 900 becomes complicated, and the degree of freedom of the pipe arrangement is limited.
[0010]
  The present invention has been made in view of such circumstances, and the object of the present invention is to reduce the size by reducing the space in the housing, to reduce the labor of assembling work, and to improve the flexibility of the pipe arrangement, and the housing. An object of the present invention is to provide a composite heat source machine that can achieve both labor saving of connection work with piping of a heating terminal outside.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, in the present invention,Both the heating heating unit and the reheating heating unit are built in the housing, and the heating unitA hot water circulation heating function that circulates hot water heated by the heating unit with a heating terminal outside the housing and a supply of hot water for heating in the housing are used as a heat source.AboveTargeting a composite heat source unit having a recirculation heating function that reheats and heats bathtub water by a reheating unit, a plurality of external units that face the outside of the housing and can be connected to the heating terminal pipe A heating header that is integrally provided with a connection port and an internal connection port that supplies the hot water supplied from the heating and heating unit to the reheating and heating unit is incorporated (claim 1).
[0012]
  In the case of the present invention, since the hot water supplied as a heat source to the reheating heater can be led from the internal connection port of the heating header, the branch pipe for branching from the conventional heating heater can be omitted. It becomes possible, and the freedom degree of pipe arrangement | positioning improvement and space saving are achieved. In addition, since the heating header is integrally provided with such an internal connection port, a pipe for guiding the hot water to the reheating heater can be assembled independently from the heating header, and the conventional branched high-temperature pipe can be installed. Assembling work becomes easier compared with the case of assembling with the high temperature outgoing pipe. Furthermore, since a heating header for distributing hot water to the heating terminal is attached to the housing in advance and the external connection port faces the outside of the housing, the connection work with the heating terminal pipe is also labor-saving.
[0013]
  in additionThe present inventionThenThe heating header has the internal connection port and a plurality of forward side external connection ports and distributes the hot water individually to the heating terminal to distribute the hot water to the forward side external connection port, and a plurality of return sides A return-side header that joins the hot water returning from the heating terminal having the external connection port from the return-side external connection port, and setting the same number of the forward-side external connection port and the return-side external connection portIt was decided to.ThisSince the headers on both the outgoing side and the return side of the hot water to the heating terminal are attached in advance to the housing, the number of external connection ports on both the outgoing side and the return side is set to the same number, Connection work with piping for heating terminals becomes easier.In addition, according to the present invention, the outgoing header is partitioned by a partition wall in the middle, and the plurality of outgoing external connection ports supply hot water according to at least two types of temperatures depending on the type of the heating terminal. It was decided to partition so that it could be divided and distributed. Thereby, for example, high-temperature water and low-temperature water are reliably supplied to two types of heating terminals, that is, a heating terminal using high-temperature water as a heat source (high-temperature terminal) and a heating terminal using low-temperature water as a heat source (low-temperature terminal). It can be distributed. It should be noted that a thermal valve may be built in the outward-side external connection port partitioned to distribute and supply the low-temperature water.
[0014]
  In the present invention, the forward header and the return header are arranged with respect to the housing so as to extend adjacent to each other in parallel, and the forward external connection port and the return external connection port are mutually connected. It can also arrange | position so that it may arrange | position by the same pitch and it may become a correspondence. In this way, when there are multiple heating terminals, each heating terminal pipe is paired on the outgoing side and the return side, and aligned and connected to the outgoing side external connection port and the return side external connection port. This makes it possible to further facilitate the above-described connection work and to align the pipes.
[0015]
  The forward header and the return header may be configured separately from each other. However, the bypass header connects the two together and bypasses the hot water from the forward header to the return header. A passage may also be formed (claims)3). In this case, all the assembly work of the pipe connection part to the heating terminal is completed simply by attaching one heating header to the housing, so that the labor of the assembly work can be greatly reduced, while the space in the housing is saved. The housing can be greatly reduced in size. In addition, it is possible to omit a bypass pipe that has been separately provided in the prior art, thereby saving space and labor for assembling work. In this case, a drain port that opens to communicate with the bypass passage and a drain plug that closes the drain port so as to be openable and closable can be provided for the connecting portion. Term4). By doing so, it becomes possible to drain both the forward side and the return side by opening the drain plug, and there is no need to separately provide a plurality of drain plugs.
[0016]
  As said external connection port, you may form so that the connection shape corresponding to the 2 or more types of connection form selected from the mutually different several connection form for connecting with piping for heating terminals may be mixed. (Claims5). Examples of the connection form include O-ring connection, bamboo shoot joint connection, screw connection, and clip connection. For example, a part of the plurality of external connection ports has a connection shape corresponding to the O-ring connection, What is necessary is just to make a part into the connection shape (formation of a screw groove) corresponding to a screw connection, and let the remainder be a connection shape (formation of the flange which protrudes on an outer periphery) corresponding to a one-touch type clip connection. By doing in this way, it becomes possible to respond | correspond to various connection forms in the connection operation | work with piping for heating terminals.
[0017]
  Further, as the external connection port, an identification display may be integrally attached to identify the type of the heating terminal to be connected and / or the distinction between the outgoing side and the return side (claims).6). As the identification display, for example, indentation or convex marking display of characters, symbols, pictograms, etc., or different color display by coloring or adding colors during synthetic resin molding may be employed. In this way, for example, the external connection port on the outgoing side can be identified as hot water or cold water, or on the outgoing sideOrIt becomes possible to easily grasp the identity of the return side, thereby facilitating and ensuring the connection work. In the outgoing header, the above-mentioned high-temperature water external connection port and the low-temperature water external connection port are made different from each other by making the protruding lengths different from each other. Even if it is installed, it is possible to easily identify whether it is for high-temperature water or low-temperature water by hand, and it is possible to reliably connect with piping for heating terminals Become.
[0018]
  Furthermore, a pressure detecting member for pressure inspection of the hot water circulation path may be detachably disposed to any one of the external connection ports.7). Since the external connection port faces the outside of the housing, the pressure inspection during the trial operation can be performed from outside the housing, and the pressure inspection can be easily performed. In addition, since the pressure detection member is arranged by using the external connection port of the heating header, it is possible to omit parts or the like conventionally required for installing the pressure detection member in another part. In addition, if the pressure detection member is removed after the inspection is performed, it can be used as an external connection port for connecting the piping for the heating terminal.
[0019]
  As the above heating header, the main body is formed by synthetic resin molding, and a sealing portion is used for at least a part of the connection ports, and a synthetic resin material different from the synthetic resin material forming the main body is used. It may be formed integrally with the main body by two-color molding.8). As a result, it is possible to omit an O-ring or the like that has been conventionally used for sealing, and it is possible to reduce the labor required for omitting parts or assembling work.
[0020]
【The invention's effect】
  As described above, claims 1 to claim8According to any of the composite heat source machines, the hot water supplied as a heat source to the reheating heater can be led from the internal connection port of the heating header, so that the branch pipe for branching from the conventional heating heater is omitted. Therefore, it is possible to improve the degree of freedom of the pipe arrangement and save space. In addition, since such an internal connection port is integrally provided in the heating header, a pipe for guiding the hot water to the reheating heater can be assembled independently from the heating header, and the conventional branched hot pipe The assembly work can be performed more easily than when the road is assembled together with the high temperature outgoing pipeline. Further, since a heating header for distributing hot water to the heating terminal is attached to the housing in advance and the external connection port faces the outside of the housing, labor saving of the connection work with the piping for the heating terminal is also achieved. be able to.
[0021]
  orSince the headers on both the outgoing side and the return side of the hot water to the heating terminal are pre-attached to the housing, and the number of external connection ports on both the outgoing side and the return side is set to the same number, the heating terminal It is possible to more easily perform connection work with piping for use.
[0022]
  Furthermore, for example, high-temperature water and low-temperature water can be reliably distributed and supplied to two types of heating terminals, that is, a high-temperature terminal using high-temperature water as a heat source and a low-temperature terminal using low-temperature water as a heat source.
[0023]
  In particular, according to claim 2, when there are a plurality of heating terminals to be connected, the piping of each heating terminal is paired on the outgoing side and the return side to the outgoing side external connection port and the return side external connection port. Therefore, it is possible to connect them by aligning them, and it is possible to further facilitate the connection work and align pipes.
[0024]
  Claim3According to the present invention, it is possible to complete all the assembly work of the pipe connection portion to the heating terminal by simply attaching one heating header to the housing, and it is possible to achieve significant labor saving of the assembly work, The housing can be greatly reduced in size by saving space. In addition, the bypass pipe line that has been separately provided in the prior art can be omitted, and space saving and labor saving of assembling work can be realized.
[0025]
  Claim4According to the above, by opening the drain plug, it is possible to drain both the return side and the return side, eliminating the need to install multiple drain plugs individually and reducing parts and assembly work. Can be achieved.
[0026]
  Claim5Accordingly, it is possible to cope with various connection forms in the connection work with the piping for the heating terminal.
[0027]
  Claim6According to the above, since the identification display is integrally attached to the external connection port, for example, the identification of whether it is for high-temperature water or low-temperature water with respect to the external connection port on the outgoing side, or the return side is the return side This identification can be easily grasped, and the connection work can be facilitated and ensured.
[0028]
  Claim7According to the present invention, it is possible to omit parts or the like conventionally required for installing the pressure detecting member in another part. In addition, since the pressure detecting member is built in the external connection port arranged facing the outside of the housing, the pressure inspection during the test operation can be performed from outside the housing, and the pressure inspection can be easily performed. . And after inspection execution, if a pressure detection member is removed, it can utilize also as an external connection port for connecting piping for heating terminals.
[0029]
  Claim8According to the present invention, since the seal portion is integrally formed by two-color molding, an O-ring or the like that has been conventionally used for sealing can be omitted, and the labor required for parts omission and assembly work can be reduced. be able to.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0031]
  FIG. 1 shows a composite heat source machine according to an embodiment of the present invention. This combined heat source machine has a hot water supply function for various hot water taps 1, a hot water circulation heating function for a high temperature terminal (heating terminal) 2 such as a fan convector and a low temperature terminal (heating terminal) 3 such as floor heating, and a hot water of a bathtub 4. It is a composite heat source machine having each function of a recirculation heating function. In the figure, 5 is a hot water supply circuit, 6 is a heating circuit, 7 is a reheating circuit, 8 is a heating header, and these are built in the housing 9. The recirculation heating function by this combined heat source machine is replenished by performing liquid-liquid heat exchange between the high temperature water of the heating circuit 6 as a heat source and the hot and cold water circulated in the reheating circuit 7. It is a whisper. In FIG. 1, one high-temperature terminal 2 and two low-temperature terminals 3 are shown, but these numbers are two or more or three or more, respectively, depending on the installation status of the heating terminal at the installation site. It will change.
[0032]
  The hot water supply circuit 5 is configured to exchange heat with the hot water supply heat exchanger 51, a water supply pipe 52 for supplying water (for example, tap water) to the hot water supply heat exchanger 51, and the hot water supply heat exchanger 51 with combustion heat. A hot water supply burner 53 for heating and a hot water supply pipe line 54 for discharging hot water after heat exchange heating and supplying hot water to the hot water tap 1 are provided.
[0033]
  Water is supplied and replenished to an expansion tank 64 (described later) through a branch water supply line 55 branched from the water supply line 52, and hot water is poured into the reheating circuit 7 through a hot water supply line 56 branched from the hot water supply line 54. The bathtub 4 can be filled with water through the scooping circuit 7.
[0034]
  The heating circuit 6 includes a heating heat exchanger 61 as a heating heating unit, a heating burner 62 that heats and heats the heating heat exchanger 61 by combustion heat, and a heating heat exchanger 61 that passes through the heating heat exchanger 61. And a circulation path 63.
[0035]
  The heating circulation path 63 includes an expansion tank 64 interposed in the middle, a return line 66 from the expansion tank 64 through the heating circulation pump 65 to the heating heat exchanger 61, and heating heat exchange. A high-temperature forward pipe 67 extending from the heater 61 to the high-temperature forward-side internal connection port 81 of the heating header 8, and a low-temperature forward-side internal connection port 82 of the heating header 8 branched from the downstream position of the heating circulation pump 65. And a tank return pipe 69 for returning low-temperature water (for example, 60 ° C. hot water) to the expansion tank 64 from the return-side internal connection port 83 of the heating header 8.
[0036]
  Further, in the heating header 8, high-temperature water (for example, 80 ° C. hot water) supplied by the high-temperature forward pipe 67 is diverted from the reheating-side internal connection port 84, and a later-described liquid-liquid of the reheating circuit 7 is used. A reheating heat source supply line 70 that is supplied to the heat exchanger 71 and returns the low-temperature water after heat exchange to the expansion tank 64 by returning the low-temperature water to the tank return line 69 is also provided. The reheating heat source supply line 70 is provided with a thermal valve for bath (not shown), and high-temperature water is supplied to the liquid-liquid heat exchanger 71 only when the thermal valve for bath is opened. It has come to be.
[0037]
  The reheating circuit 7 includes the liquid-liquid heat exchanger 71 serving as a reheating heater, a recirculation circuit 72 passing through the liquid-liquid heat exchanger 71, and hot water in the bathtub 4 through the circulation path 72. And a recirculation pump 73 for circulating the water. When hot water in the bathtub 4 is circulated through the recirculation circuit 72 by the operation of the recirculation circulation pump 73, the high-temperature water from the reheating heat source supply line 70 in the liquid-liquid heat exchanger 71. Thus, the liquid-liquid heat exchange is heated and retreated.
[0038]
  As shown in FIG. 2, the heating header 8 is integrally formed with a forward header 10, a return header 11 extending in parallel therewith, and a connecting portion 12 that connects one end side of both headers 10, 11. Is. As shown in FIGS. 3 to 5, the internal connection ports 81 to 84 are opened from the upper surface so as to face upward in the housing 9, and the forward side external connection ports 101 to 105 and the same number of return side external connections are provided. The heating header 8 is attached to the inner wall portion 91 at the bottom of the housing 9 so that the ports 111 to 115 pass through the housing 9 and project outward. The number of external connection ports on each of the forward side and the return side is not five as shown in the figure, but may be less than five or six or more as long as it is at least two, even in these cases. Although it is preferable that the forward side and the return side have the same number, the number may be different. Further, each of the external connection ports 101 to 105 and 111 to 115 is formed in a shape having a smooth inner peripheral surface for O-ring connection, but a screw groove for screw connection is formed in part. You may make it form in the connection shape corresponding to these connection forms.
[0039]
  The forward header 10 is divided on the way by a partition wall 106 (see FIG. 3) and divided into a high temperature forward header portion 10a and a low temperature forward header portion 10b. In the high-temperature forward header section 10a, one or more (two in the illustrated example) high-temperature forward-side external connection ports 101 and 102 are branched from the communication path 107 communicating with the high-temperature forward-side internal connection opening 81, and the low-temperature forward header section. In 10 b, one or more (three in the illustrated example) low-temperature forward side external connection ports 103 to 105 are branched with respect to the communication path 108 communicating with the low-temperature forward-side internal connection port 82. Further, the low-temperature outward connection ports 103 to 105 each have a built-in thermal valve 13 so that the communication path 108 and the external connection ports 103 to 105 can be switched between open and shut off. The external connection ports 101 to 105 on both the high temperature side and the low temperature side are arranged at regular intervals at a predetermined pitch.
[0040]
  It should be noted that projecting cylindrical portions 811 and 821 that pass through the housing 9 and project outwardly from the housing 9 are formed continuously in the high temperature forward side internal connection port 81 and the low temperature forward side internal connection port 82, respectively. The manual valve type pressure detecting member 14 is screwed into each of the cylindrical portions 811 and 821 for pressure inspection, and is shipped as a product. These pressure detection members 14 and 14 are connected to the hot water circulation path (the forward side and the return side communicated with various heating terminals outside the composite heat source machine) in the trial operation performed after the composite heat source machine is actually installed and the connection work with the piping is completed. This is used for checking whether or not the internal pressure of the path formed by the pipe on the side becomes a predetermined value. When this check is completed, each pressure detecting member 14 remains or is removed and each protrusion is removed. Even if the cylindrical portions 811 and 821 are used as one of the external connection ports for screw connection, they are selected depending on the installation situation.
[0041]
  The forward header 10 has an upstream end of a high temperature forward piping 21 (see also FIG. 1) via a pipe joint member 15 with respect to the high temperature forward external connection ports 101 and 102 of the high temperature forward header portion 10a. Are connected, and this high temperature piping 21 is extended to the high temperature terminal 2. The upstream end of the low-temperature forward piping 31 is connected to the low-temperature forward-side external connection ports 103 to 105 of the low-temperature forward-side header portion 10b through a pipe joint member similar to the above, although not shown. The low temperature piping 31 is extended to the low temperature terminal 3. Note that a closing plug 16 is press-fitted into an unused external connection port (102 in FIG. 3) to be closed. The pipe connection member 15 is a connection part using an O-ring on the side of the external connection ports 101 to 105 on one end side, and the pipes 21 and 31 side on the other end side are bamboo shoot joint parts (tapered joint parts), Both are connected by press-fitting and are prevented from coming off by a clip sandwiching the flange portion at the center position and the flange portions of the external connection ports 101 to 105.
[0042]
  The return-side header 11 branches from return-side external connection ports 111 to 115 from a communication path 116 (see FIG. 5) communicating with the return-side internal connection port 83, and returns from each return-side external connection port 111 to 115. The incoming low temperature water is merged in the communication path 116 and led out from the return side internal connection port 83 to the tank return pipe 69. Further, a protruding cylinder portion 831 (see FIG. 4) that penetrates through the housing 9 and protrudes outwardly from the housing 9 is also formed continuously in the return side internal connection port 83. The pressure detecting member 14 for pressure inspection is shipped as a product in a screwed state. The return side external connection ports 111 to 115 of the return side header 11 are arranged at equal intervals with the same pitch as the external connection ports 101 to 105 of the forward side header 10, and the forward side and the return side are adjacent to each other to make a pair. The corresponding arrangement is as follows.
[0043]
  For the return side external connection ports 111 to 115 of the return side header 11, although not shown, a high temperature return pipe extending from the high temperature terminal 2 (see FIG. 1) through a pipe joint member 15 similar to the above. The downstream end of 22 and the downstream end of the low temperature return pipe 32 extending from the low temperature terminal 3 are connected, and a closing plug 16 (see FIG. 3) is press-fitted into the unused external connection port and closed.
[0044]
  In addition, a communication passage 121 is formed in the connecting portion 12 to allow the high-temperature going-side internal connection port 81 and the reheating-side internal connection port 84 to communicate with each other. The high temperature forward side internal connection port 81 and the communication passage 107 of the high temperature forward side header portion 10a are communicated with each other via the communication path 121.
[0045]
  The communication path 121 is also connected to the return-side internal connection port 83 side by a relatively small-diameter bypass path 122, and surplus high-temperature water supplied from the high-temperature forward-side internal connection port 81 is used as the bypass path 122. Through the return side internal connection port 83 to the expansion tank 64. Further, a drain port 123 is formed in the connecting portion 12 so as to communicate with the lower surface of the communication path 121 and pass through the housing 9 to face downward and to the outside. A drain plug 124 is provided to the drain port 123. Screwed to open and close. That is, by removing the drain plug 124, both the forward side and the return side can be drained.
[0046]
  Although the above heating header 8 can be integrally formed by synthetic resin molding using one type of synthetic resin material, the sealing portion is formed by a two-color molding method using a synthetic resin material different from the above for the sealing portion. It may be formed integrally and the O-ring in the O-ring connection may be omitted or used together with the O-ring.
[0047]
  For example, the seal portion may be formed integrally with the inner peripheral portions of the connection ports such as the internal connection ports 81 to 84 and / or the external connection ports 101 to 105 and 111 to 115. As illustrated in FIGS. 6A, 6 </ b> B, and 6 </ b> C, the seal portion 17 is integrally formed on the inner peripheral portion of the various connection ports J described above. 6A, a seal portion 17 that slightly protrudes inward is formed on the inner peripheral portion of the connection port J. In FIG. 6B, the opening end side is thicker than the inner peripheral portion of the connection port J. A seal portion 17 is formed such that the thickness decreases as going to the back, and the seal portion 17 is formed at the back end of the connection port J in FIG. The seal portion 17 is formed by first injecting a first synthetic resin material for forming a heating header into a mold for forming the heating header 8 into a predetermined mold, and then forming a second portion for forming the seal portion. The synthetic resin material may be secondarily injected.
[0048]
  In the case of the above combined heat source machine, all of the distribution of the outgoing hot water to the heating terminals 2..., 3. In addition to being able to be performed via the header 8, supply of hot water as a heat source from the heating circuit 6 to the reheating circuit 7 can also be performed via the heating header 8. That is, all the functions of the distribution and supply of hot water from the heating circuit 6 and the return-side merging can be realized only by assembling the single heating header 8 to the inner wall 91 of the housing 9. The connection work of the circuit 7 with the liquid-liquid heat exchanger 71 may be performed with the heating header 8. Further, since the bypass passage 122 is formed in the connecting portion 12, it is not necessary to provide an independent bypass conduit. Furthermore, it is possible to drain both the forward side and the return side in the heating circuit 6 by providing only one drainage port 123 in the connecting portion 12.
[0049]
  Thereby, in the housing 9, it is possible to reduce the size of the housing 9 by reducing the required internal space, save labor in assembling work, and increase the degree of freedom of arrangement of various pipes in the housing 9. . On the other hand, outside the housing, all the connection work of the high temperature terminal forward pipe 21 and the return pipe 22 and the low temperature terminal forward pipe 31 and the return pipe 32 are exposed to the outside from the same heating terminal 8. It is only necessary to perform the steps 101 to 105 and 111 to 115, and the connection work can be facilitated.
[0050]
<Other embodiments>
  In addition, this invention is not limited to the said embodiment, Various other embodiments are included. That is, in the said embodiment, although the composite heat source machine which has three functions, a hot-water supply function, a hot water circulation heating function, and a reheating circulation heating function, was shown, it is not restricted to this, At least a hot water circulation heating function and reheating circulation heating are shown. The present invention can be applied to any composite heat source machine having two functions.
[0051]
  In the above embodiment, as the heating header, the forward header 10, the return header 11 extending in parallel therewith, and the connecting portion 12 connecting the one end sides of both headers 10, 11 are integrally formed by synthetic resin molding. However, the present invention is not limited to this, and the forward header and the return header may be configured independently of each other by removing the connecting portion 12. In this case, the reflow internal connection port 84 may be formed in communication with the forward header side.
[0052]
  In the above-described embodiment, a configuration has been shown in which the hot header at two types of temperatures for high temperature and low temperature can be distributed and supplied as the outgoing header 10, but the present invention is not limited to this, and one type of hot water is distributed and supplied. May be. In this case, the partition wall 106 may be eliminated and the low-temperature going-out internal connection port 82 may be omitted and closed. Further, even if the partition wall 106 is eliminated and the low temperature internal connection port 82 is omitted, it is possible to distribute and supply hot water having two types of temperatures for high temperature and low temperature. For example, it is also possible to supply a low-temperature heat source to the low-temperature terminal 3 by intermittently opening / closing control of the thermal valve 13 with high-temperature water supplied from the high-temperature going-side internal connection port 81.
[0053]
  In the above-described embodiment, the identification display (for example, convex character display) for identifying the forward side or the return side external connection ports 101 to 105 and the return side external connection ports 111 to 115 is integrated by synthetic resin molding. You may make it form in. At this time, it is preferable that an identification display for identifying either the high-temperature forward side 101, 102 or the low-temperature forward side 103-105 is integrally formed in the forward-side external connection ports 101-105. Further, the identification may be made by the physical length without using the identification display. For example, the forward-side external connection ports 101 to 105 and the return-side external connection ports 111 to 115 are differentiated from each other in projecting length to identify whether the forward side or the return side is touched by the operator's visual sense or touch. It may be possible to do this. In addition, in the forward side external connection ports 101 to 105, the high temperature forward sides 101 and 102 and the low temperature forward sides 103 to 105 are differentiated from each other to distinguish between the high temperature forward side and the low temperature side. You may be able to do it.
[0054]
  In the above embodiment, the pressure detecting member 14 is built in the forward side internal connection ports 81 and 82, but the built-in pressure detecting member 14 may be omitted and a check valve may be built instead. This check valve is disposed so as to allow passage of high-temperature water and low-temperature water supplied from the heat exchanger 61 through the forward-side internal connection ports 81 and 82 while preventing reverse flow. By disposing such a check valve, it is possible to prevent pressure from acting from the external heating terminal side to the composite heat source machine side in the housing 9 during pressure inspection.
[0055]
  In the said embodiment, although the heating header is attached with respect to the inner wall part 91 from the inside of the housing 9, and arrange | positions so that each connection port 101 grade | etc., May face the outside of a housing, it is not restricted to this, A part of the heating header may be disposed in the housing by being attached to the mounting hole of the housing from the outside of the housing, and the connection ports may be disposed outside the housing. “Built-in” in the case where the heating header in the claims is built in the housing includes the mounting method and arrangement described above.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an entire system to which an embodiment of the present invention is applied.
FIG. 2 is a plan view of a heating header.
FIG. 3 is a cross-sectional explanatory diagram of a partial appearance state along line AA in FIG. 2;
4 is an explanatory cross-sectional view taken along line BB in FIG. 2;
5 is a cross-sectional explanatory diagram of a partial appearance state taken along the line CC in FIG. 2;
6 is a partial cross-sectional view showing a seal portion formed by a two-color molding method, FIG. 6 (a) is a convex seal portion, FIG. 6 (b) is a seal portion formed on a part of a cylindrical wall, FIG. 6C shows a seal portion formed at the back end.
FIG. 7 is a schematic diagram showing an example of a conventional composite heat source machine.
FIG. 8 is a schematic diagram showing a state of connection with piping by extracting a part of FIG. 7;
FIG. 9 is an exploded perspective view for explaining a manner of assembling a conventional header or connection plug to a housing.
FIG. 10 is a partial cross-sectional explanatory view showing a state in which a conventional header part is attached to the outside of the housing.
[Explanation of symbols]
2 High temperature terminal (heating terminal)
3 Low temperature terminal (heating terminal)
4 Bathtub
6 Heating circuit
7 Reaping circuit
8 Heating header
9 Housing
10 Outward header
11 Return header
12 Connecting part
14 Pressure detection member
17 Sealing part
21 High temperature piping (heating terminal piping)
31 Low-temperature piping (heating terminal piping)
22 High temperature return piping (heating terminal piping)
32 Low temperature return side piping (heating terminal piping)
61 Heat exchanger for heating (heating heating part)
62 Heating burner (heating heating section)
71 Liquid-liquid heat exchanger (reheating heater)
84 Reheating side internal connection port (internal connection port)
91 inner wall
101,102 High temperature outward connection port (outward connection port)
103 to 105 Low-temperature external connection port (external connection)mouth)
106 partition wall
111 to 115 Return side external connection port
122 Bypass passage
123 Drain outlet
124 Drain tap
811, 821 Protruding cylinder (outward side external connection port)
831 Projecting cylinder (return side external connection port)

Claims (8)

A heating heating unit and a reheating heating unit are both built in the housing, and a hot water circulation heating function for circulating hot water heated by the heating heating unit between the heating terminal and the heating terminal outside the housing, and hot water for heating in the housing in the composite heat source machine comprising a Reheating circulating heating function for heating reheating the bathtub water by the forbearance fired heating unit you this heating hot water supplied as a heat source,
The housing includes a plurality of external connection ports that face the outside of the housing and can be connected to the heating terminal pipe, and internal connection ports that supply hot water supplied from the heating and heating unit to the reheating and heating unit. A built-in heating header is built-in ,
The heating header has the internal connection port and a plurality of forward side external connection ports and distributes the hot water individually to the heating terminal to supply hot water to the heating terminal, and a plurality of return side externals A return side header that joins warm water returning from the heating terminal having a connection port from the return side external connection port;
The outgoing side external connection port and the return side external connection port are set to the same number,
The forward header is partitioned by a partition wall in the middle, and the partition walls allow the plurality of forward external connection ports to divide and distribute at least two types of hot water according to the type of heating terminal. Partitioned,
Composite heat source machine which is characterized a call. The composite heat source machine according to claim 1 ,
The forward header and the return header are arranged with respect to the housing so as to extend adjacent to each other in parallel,
The combined heat source apparatus, wherein the forward-side external connection port and the return-side external connection port are arranged at the same pitch and are in a corresponding relationship. The composite heat source machine according to claim 1 or 2 ,
The combined heat source machine, wherein the forward header and the return header are integrally connected to each other, and a bypass passage for bypassing hot water from the forward header to the return header is formed at the connecting portion. The composite heat source machine according to claim 3 ,
The combined heat source apparatus, wherein the connecting portion is provided with a drain opening that opens to communicate with the bypass passage and a drain plug that closes the drain opening so as to be openable and closable. The composite heat source machine according to any one of claims 1 to 4 ,
The said external connection port is formed so that the connection shape corresponding to the 2 or more types of connection form selected from the mutually different several connection form for connecting with piping for heating terminals may be mixed Machine. The composite heat source machine according to any one of claims 1 to 5 ,
The said external connection port is a composite heat source machine to which the identification display is attached | subjected integrally in order to identify the kind of heating terminal connected, and / or the distinction of an outgoing side or a return side. The composite heat source machine according to any one of claims 1 to 6 ,
A composite heat source machine, wherein a pressure detection member for pressure inspection of the hot water circulation path is detachably disposed in any one of the external connection ports. The composite heat source machine according to any one of claims 1 to 7 ,
The heating header has a main body formed by synthetic resin molding, and at least a part of the connection ports has a two-color seal using a synthetic resin material different from the synthetic resin material forming the main body. A composite heat source machine formed integrally with the main body by molding.

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