JP2006317092A - Instantaneous hot water system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instantaneous hot water system capable of avoiding the occurrence of cold water sandwich in the beginning of resuming hot water supply and the occurrence of inconvenience following connection work of various piping for the circulating supply of a heat medium for heating. <P>SOLUTION: An instantaneous hot water header 4 is connected to an outlet of a hot water discharge line 34 of a hot water supply device 3, and hot water supply to respective hot water supply plugs 61-63 by hot water supply pipelines 81-83 is performed through the instantaneous hot water header. Forward pipelines 91-93 and return pipelines 94-96 for circulating the heat medium to each hot water supply pipeline are bound in contact. The instantaneous hot water header is constituted by combining a heat medium forward header part 42 for branching the heat medium supplied from a heating device 2, to the forward pipelines, and a heat medium return header part 43 converging the heat medium returned from the return pipelines, with a hot water supply header part 41 branching upon receiving hot water so that hot and cold water in the hot water supply header part are heated receiving heat transferred from the heat medium in the heat medium forward header part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an immediate hot water system configured such that when a hot water tap is opened, hot water can be used immediately without waiting for hot water flowing from the hot water supply apparatus to flow.

  Conventionally, as this type of instant hot water system, for example, the one shown in FIG. 12 has been adopted. In this apparatus, a heating and circulating apparatus 104 for hot water is interposed in a hot water supply pipe 103 extending from an outlet of a hot water supply passage 101 in the hot water supply apparatus 100 to a hot water supply tap (hot water supply curan) 102. That is, a circulation pipe 105 is configured by using a part of the hot water supply pipe 103, and a heating circulation device 104 including a pump 106 and a heater (electric heater) 107 is interposed in the middle of the circulation pipe 105. In the state where the hot-water tap 102 is closed and the hot-water supply operation in the hot-water supply device 100 is stopped, the pump 106 and the heater 107 are operated to heat the hot water in the circulation pipe 105 to a predetermined temperature range. When the hot water tap 102 is opened next time, the hot water in the circulation pipe 105 is immediately discharged from the hot water tap 102.

  Patent Document 1 or Patent Document 2 discloses a heating medium circulation type in which heating medium or high-temperature water for a heat source (hereinafter, both are simply referred to as “heating medium”) is circulated between a radiator and heating. It has been proposed that a heating medium is introduced from a heating device of this type, and the hot water supply piping is heated by the heating medium so as to exhibit the function of an instant hot water. For example, as shown in FIG. 13, a hot water circulation pipe 114 supplied from a heat medium circulation heating device 113 is brought into contact with a hot water supply pipe 112 extending from the hot water supply apparatus 110 to the hot water tap 111. Accordingly, the hot water staying in the hot water supply pipe 112 is heated by heat transfer from the circulation pipe 114.

JP 2004-53078 A JP 2004-21901 A

  However, in the case where the heating circulation device 104 for the hot water illustrated in FIG. 12 is attached, the hot water in the circulation pipe 105 circulated by the heating circulation device 104 is heated, but hot water is supplied from the circulation pipe 105. Hot water remaining in the hot water supply pipe 103 on the apparatus 100 side, specifically, a portion on the hot water supply apparatus 100 side of the hot water supply pipe 103 and a heat exchanger 108 in the hot water supply apparatus 100 in each of the hot water outlets 101 on the downstream side is not heated. When the hot-water tap 102 is opened next, the hot water that has been cooled may come out of the hot-water tap 102 and cause a so-called cold water sandwich.

  Further, in the case of using the heat medium from the heating medium circulation type heating device 113 illustrated in FIG. 13 as a heat source for heating, the hot water tap 111 to be supplied with hot water from the hot water supply device 110 is a kitchen curan, a toilet curan or a shower curan. Since there are a plurality of hot water supply pipes extending from the hot water supply apparatus 110 as many as the number of such hot water supply taps, a plurality of circulation pipes for the heat medium piped to the plurality of hot water supply pipes are used as the heating device. The operation of connecting to 113 one by one becomes complicated. On the other hand, the heating device 113 is originally for circulating and supplying a heat medium to various radiators such as a bathroom dryer and a floor heating device, and heating for connecting these original circulation pipes for circulation supply. Headers (heating medium forward side header 115 and return side header 116) are provided. However, it may cause a situation in which the connection object, which is the original purpose, cannot be connected to connect the circulation pipes 114 and the like to the plurality of hot water supply pipes 112. If a heating header having a connection port is prepared, it is contrary to the demand for downsizing and may cause difficulty in arrangement.

  An object of the present invention is to provide an instant hot water system capable of eliminating such inconveniences. More specifically, in addition to avoiding the occurrence of the cold water sandwich described above, there is a solution to the inconvenience when connecting a circulation pipe for supplying a heat medium attached to a plurality of hot water supply pipes to a heating device.

  In order to achieve the above object, the present invention is configured such that hot water is supplied to a plurality of hot water supply destinations from an outlet of a hot water supply device through individual hot water supply pipes, while heating medium circulation heating is performed in a hot water supply operation stop state. The following specific items are targeted for an instant hot water system in which a circulation pipe is connected to each hot water supply pipe so that the hot water in the hot water supply pipe is heated by heat transfer by receiving a circulating supply of heat medium from the equipment. I prepared. That is, an immediate hot water header is interposed between the hot water supply device and the hot water supply pipe, and as the immediate hot water header, the inlet side connection port is connected to the outlet of the hot water outlet and the hot water supply pipes are connected to a plurality of outlet side connection ports. Are connected to the heating device side so that the inlet connection port receives the supply of the heat medium from the heating device, and the plurality of outlet connection ports are upstream ends of the circulation pipes. The heating medium forward header section that is individually connected to each other and the plurality of inlet side connection ports are individually connected to the downstream end of the circulation pipe, and the heating medium returned from the circulation pipe is joined to the outlet connection port A heating medium return header portion connected to the heating device side so as to return the combined heat medium to the heating device is provided. In addition, the heating medium return header part and the heating medium return header part are connected to the hot water supply header part so that the hot water in the hot water supply header part receives heat transfer from the heating medium in the heating medium return header part and the heating medium return header part. (1).

  In the case of this invention, in the hot water supply stop state, the hot water remaining in the path from the outlet of the hot water supply device to the hot water tap is heated also in the hot water supply header portion which is the closest position to the outlet of the hot water supply passage. Become. That is, the heat of the heat medium supplied to the heat medium head header is transferred to the hot water header, and the hot water in the hot water header is heated by this heat transfer. And since this hot-water supply header part is connected with the hot-water supply channel exit, the warming area in the hot-water supply header part will be expanded also to the residual hot water in a hot-water supply channel by natural convection. Thereby, when the hot-water tap is opened and the next hot-water supply operation is started, the occurrence of the cold water sandwich phenomenon caused by the remaining hot water in the hot water outlet flowing out from the hot-water tap is avoided. In addition, even if there are a plurality of hot water supply pipes, connection to circulation pipes arranged in each hot water supply pipe is made to the heat medium forward header part and the heat medium return header part of the hot water header, while the supply of the heat medium and Since the return only needs to be performed by a single path between the heating device and the heat medium return header and the heat medium return header, the connection with the original heat medium circulation supply destination is obstructed on the heating device side. There will be no trouble.

  The following various specific items can be added to the above invention. Of course, you may make it add combining 1 or 2 or more selected from the various specific matters shown below.

  First, it comprises an immediate hot water operation control means, and as the immediate hot water operation control means, based on a comparison between a detected temperature from a hot water supply temperature sensor arranged in the hot water outlet and a judgment temperature, The circulation supply operation of the heating medium to the instant hot water header is controlled to be switched on and off alternately (Claim 2). As mentioned above, as the hot water in the hot water supply header is heated, the heating area also extends to the hot water supply path, so it is possible to grasp the heating status in the immediate hot water header by monitoring the temperature detected from the hot water temperature sensor. It becomes possible. For this reason, the hot water remaining in the path from the hot water supply device to the hot water tap is controlled by alternately switching ON / OFF the circulating supply operation of the heat medium to the hot water header by comparing the detected temperature with the judgment temperature. Can be easily and reliably maintained in a state heated to a constant temperature.

  Secondly, automatic opening / closing means for automatically switching between execution and stop of the circulating supply of the heating medium via the immediate hot water header is provided, and the automatic opening / closing means depends on whether the hot water temperature in the hot water supply header section is high or low. It is set as the structure which switches automatically (Claim 3). By adding the automatic opening and closing means, the supply of the heat medium is automatically switched according to whether the hot water temperature in the hot water supply header is high or low, so that the switching is automatically performed without performing the switching control as described above. The hot water remaining in the path from the hot water supply device to the hot water tap can be easily and reliably maintained in a state heated to a constant temperature.

  Third, the immediate hot water header is assembled such that at least one of the heating medium return header part and the heating medium return header part is movable relative to the hot water supply header part via a slider. Item 4). In this case, since the position of each connection port of the instant hot water header can be changed and adjusted by making the relative movement by the slider, the positional relationship of various pipes connected to each connection port can be changed for each site or device. Even if they are slightly different from each other, the communication connection work can be made possible and the applicable range of the hot water header is expanded.

  Fourthly, it is assumed that the immediate hot water header is provided with a rotation adjustment portion capable of swinging at a connection portion with at least one of the hot water supply device and the heating device (Claim 5). Even in this case, since the position of each connection port of the hot water header can be changed and adjusted by swinging in the rotation adjusting unit, the positional relationship of various pipes etc. connected to each connection port is different for each site or Even if it is slightly different for each device, the communication connection work can be made possible, and the applicable range of the hot water header is expanded.

  As a fifth aspect, it is assumed that the immediate hot water header is provided with a position adjusting portion that can move relative to the expansion and contraction direction at a connection portion with at least one of the hot water supply device and the heating device. Also in this case, since the position of each connection port of the instant hot water header can be changed and adjusted by relatively moving in the expansion / contraction direction in the position adjustment unit, the positional relationship of various pipes connected to each connection port is In addition, even if there is a slight difference between devices, the communication connection work can be made possible, and the applicable range of the instant hot water header is expanded.

  As described above, according to the instant hot water system of the present invention, the hot water supply that is in the immediate vicinity of the hot water outlet is used as the warming for hot water remaining in the path from the hot water outlet to the hot water tap of the hot water supply device. Since it can be performed also in the header portion, the remaining hot water in the hot water outlet of the hot water supply device can also be heated by expanding the heating region by natural convection. Thereby, when the hot water tap is opened and the next hot water supply operation is started, it is possible to reliably avoid the occurrence of the cold water sandwich phenomenon caused by the remaining hot water in the hot water outlet flowing out of the hot water tap. . In addition, even if there are multiple hot water supply pipes to be heated by the circulation pipe, the connection with the original circulating supply destination of the heat medium is hindered or hindered on the heating device side by interposing the immediate hot water header. Can be avoided.

  In particular, according to the second aspect, on the basis of the comparison between the temperature detected by the hot water supply temperature sensor and the judgment temperature, the heating medium circulation supply operation to the immediate hot water header is switched on and off alternately by the immediate hot water control means. The hot water remaining in the path from the hot water supply device to the hot water tap can be easily and reliably maintained in a state heated to a constant temperature.

  According to the third aspect of the present invention, by adding the automatic opening / closing means, it is possible to automatically switch between executing and stopping the circulation of the heating medium according to the level of the hot water temperature in the hot water supply header, and switching control. Even if it does not perform, it becomes possible to easily and reliably maintain the hot water remaining in the path between the hot water supply device and the hot water tap at a constant temperature.

  According to claim 4, the position of each connection port of the hot water header is changed and adjusted by moving at least one of the heat medium return header portion and the heat medium return header portion relative to the hot water header portion by the slider. In addition, according to the fifth aspect, the position of each connection port of the instant hot water header can be changed and adjusted by swinging in the rotation adjusting portion. Further, according to the sixth aspect, the position adjustment can be performed. By relative movement in the expansion / contraction direction at the section, the position of each connection port of the quick water header can be changed and adjusted. As described above, according to any one of claims 4 to 6, even if the positional relationship of various pipes connected to each connection port is slightly different from site to site or from device to device, the communication connection work In addition, the application range of the instant hot water header can be expanded.

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

<First Embodiment>
FIG. 1 shows an instant hot water system according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a heat source machine, and the heat source machine 1 is configured integrally with a heating medium circulation heating device 2 and a hot water supply device 3 provided in the same housing. The heat source unit 1 is also called a water heater with a heating medium circulation type heating function or a heating medium circulation type heating machine with a hot water supply function. In the instant hot water system, the characteristic hot water header 4 in the present invention is connected to the hot water supply device 3 of the heat source unit 1, and the heat medium from the heating device 2 is circulated and supplied to the immediate hot water header 4. It is a thing. Details will be described below.

  The heating device 2 includes an expansion tank 21, a circulation pump 22, a combustion burner 23, a heat exchanger 24, a heating header 25 with a thermal valve, and a heating return header 26, and various radiators. Is configured to circulate and supply a heat medium. Depending on the radiator to be circulated, a heat medium having a high temperature (for example, 80 degrees) and a heat medium having a low temperature (for example, 60 degrees) can be circulated and supplied. Yes.

  If the radiator is a bathroom dryer 51 that requires a high-temperature heat medium, for example, the circulation pump 22 is operated, the combustion burner 23 is combusted, and the heat medium in the expansion tank 21 is heat exchanged through the return path 27. The heat medium which is sent to the vessel 24 and heat-heated by the heat of combustion of the combustion burner 23 to raise the temperature to a predetermined high temperature is supplied to the bathroom dryer 51 through the high temperature outgoing path 28 and the high temperature outgoing pipe 52 outside the apparatus. The heat medium that has radiated heat in the bathroom dryer 51 and has a low temperature is returned to the heating return header 26 through the return pipe 53 and then returned to the expansion tank 21. Thereafter, this is repeated and a high-temperature heat medium is circulated and supplied to the bathroom dryer 51, and accordingly, the heat medium after heat dissipation is returned to the expansion tank 21.

  When the radiator is a floor heater 54 that requires a low-temperature heat medium, for example, by opening the thermal valve corresponding to the floor heater 54 in the heating header 25 and operating the circulation pump 22, The low-temperature heat medium in the expansion tank 21 is supplied as it is to the floor heater 54 through the low-temperature forward passage 29, the heating forward header 25, and the low-temperature forward piping 55. Then, the heat medium having the value after being radiated by the floor heater 54 is returned to the expansion tank 21 through the return pipe 56 and the heating return header 26. Note that FIG. 1 shows only one floor heater 54 as a radiator that receives circulation supply of a low-temperature heat medium, but other floor heaters or the like in other rooms also have a low-temperature heat medium. It can be connected to receive the circulation supply.

  The heating head header 25 includes an inlet side connection port connected to the downstream end of the low temperature path 29 and a plurality of outlet side connection ports each provided with a thermal valve as an on-off valve. The heat medium flowing in from the inlet side connection port is caused to flow out to the outlet side connection port in which the thermal valve is open. The heating return header 26 includes a plurality of inlet side connection ports and an outlet side connection port on the side returned to the expansion tank 21. The heating medium returned from each inlet side connection port is joined. Then, it returns to the expansion tank 21 from the outlet side connection port. Note that a closing plug is connected to the unused outlet connection port of the heating header 25 and the unused inlet connection port of the heating return header 26 to be closed.

  The hot water supply device 3 includes a water supply channel 31, a combustion burner 32, a heat exchanger 33, and a hot water supply channel 34, while the water supplied by the water supply channel 31 passes through the heat exchanger 33. The hot water heated by heat exchange from the combustion burner 32 and heated to a predetermined temperature is discharged into the hot water outlet 34. An immediate hot water header 4 is connected to the downstream end of the hot water supply channel 34, and hot water is supplied to a plurality of hot water taps 61, 62, 63 via the immediate hot water header 4. In this hot water supply device 3, combustion control based on the detected temperature from the hot water supply temperature sensor 35 is performed by hot water supply operation control by the controller 7, whereby the hot water supply temperature to the hot water supply taps 61, 62, 63 is applied to, for example, the remote controller 71. The set hot water supply temperature is set as input. Hot water supply pipes 81, 82, 83 are connected to the hot water supply taps 61, 62, 63 from the immediate hot water header 4, and a heating medium is circulated and supplied to the hot water supply pipes 81, 82, 83 as will be described later. Outward pipes 91, 92, 93 and return pipes 94, 95, 96 that return at the downstream ends of the forward pipes 91, 92, 93 to return the heat medium come into contact with the hot water supply pipes 81, 82, 83 to transfer heat. The three are integrated as possible.

  As shown in FIG. 2, the hot water header 4 is formed by integrally forming a hot water supply header portion 41, a heat medium forward header portion 42, and a heat medium return header portion 43 by casting, for example. Hot water supply pipes 81, 82, and 83 are provided between the hot water supply taps 61, 62, and 63 starting from the header 4. The immediate hot water header 4 is integrally formed by synthetic molding in addition to the above casting, or by assembly by fitting, engagement or screwing after individual manufacture.

  The hot water supply header 41, the heat medium forward header 42, or the heat medium return header 43 is formed in a manifold or manifold, respectively. As shown in FIG. 3, the hot water supply header 41 has a communication space 411 extending in a longitudinal direction (a direction orthogonal to the paper surface of FIG. 3A, a horizontal direction of FIG. 3B), and an opening at one end of the communication space 411. Then, an inlet side connection port 412 that is detachably connected to the downstream end of the hot water supply passage 34 of the hot water supply device 3 and a side surface side of the communication space that opens at a predetermined interval in the longitudinal direction and opens each hot water supply pipe 81. , 82, 83 (see FIGS. 1 and 4), a plurality (three in the illustrated example) of outlet side connection ports 413, 414, and 415 are provided. The other end side of the communication space 411 is closed by a lid 416. By removing the lid 416, an inlet side connection port of another instant hot water header (not shown) can be connected. Two or more can be added in series.

  Further, although the above-mentioned heating medium forward header section 42 is used for diverting the heating medium, and the heating medium return header section 43 is used for combining the heating medium, the purpose and application are different. Are the same. Here, the case of using the upper part of FIGS. 2 and 3 as the heat medium forward header part 42 and the lower part as the heat medium return header part 43 will be described as an example in accordance with the drawings. The heat medium outgoing header section 42 includes a communication space 421 extending in the longitudinal direction and an outgoing pipe or outgoing connecting pipe (hereinafter referred to as “outward connecting pipe”) 57 from the heating outgoing header 25 of the heating device 2 (see FIG. 1). ) And a plurality of outlets formed so as to open to the same number as the outlet side connection ports 413, 414, and 415 of the hot water supply header 41. Side connection ports 423, 424, and 425 are provided. The heat medium return header portion 43 only has a different name depending on the purpose of use, and the return space or return connection pipe (hereinafter referred to as “return connection pipe”) following the communication space 431 and the heating return header 26 of the heating device 2. ) 58 (see FIG. 1) are connected to the outlet side connection port 432, and the same number of inlet side connection ports 433, 434, and 435 arranged on the same side as the outlet side connection ports 423, 424, and 425 described above. I have.

  The communication space 411 of the hot water supply header portion 41 extends over almost the entire length in the longitudinal direction with the communication space 421 of the heat medium forward header portion 42 and the communication space 431 of the heat medium return header portion 43 and the partition walls 44 and 45 interposed therebetween. Hot water remaining in the communication space 411 is transferred from the heat medium passing through the communication spaces 421 and 431 (especially the communication space 421 through which the high-temperature heat medium passes) through the partition walls 44 and 45 to be added. It has come to be heated. In addition, in the above-mentioned outlet side connection ports 413 to 415 of the hot water supply header portion 41, outlet side connection ports 423 to 425 of the heating medium forward header portion 42, and inlet side connection ports 433 to 435 of the heating medium return header portion 43, A closing plug (not shown) is connected to an unused connection port by screwing or clipping to be closed.

  Next, the connection relationship between the above-mentioned immediate hot water header 4 and various pipes will be described with reference to FIG. Before that, the hot water supply pipes 81 to 83 are brought into contact with the forward pipes 91 to 93 and the return pipes 94 to 96 so that heat can be transferred from the forward pipes 91 to 93 and the return pipes 94 to 96. For example, three pipes 91, 92, 93 and return pipes 94, 95, 96 are bundled together by, for example, an aluminum tape 901, and a protective cylinder 902 is put on the outer periphery to provide heat insulation. The downstream ends of the forward pipes 91 to 93 are individually connected to the upstream ends of the return pipes 94 to 96 by return pipes 97 to 99 at positions near the hot water taps 61 to 63.

  First, the hot water header 4 is connected to the hot water supply device 3. This is performed by connecting the inlet side connection port 412 of the hot water supply header 41 to the outlet 341 of the hot water outlet 34 using, for example, a mounting clip or the like via a seal packing or the like. Next, the upstream ends of the hot water supply pipes 81 to 83 are connected to the outlet side connection ports 413 to 415 of the hot water supply header section 41. Thereby, the connection of the hot water supply system is completed. Then, the downstream end of the forward connection pipe 57 is connected to the inlet connection port 422 of the heat medium forward header portion 42, and the outgoing pipes 91 to 93 are connected to the outlet side connection ports 423 to 425 of the heat medium forward header portion 42. Connect the upstream ends individually. In addition, the downstream ends of the return pipes 94 to 96 are individually connected to the inlet side connection ports 433 to 435 of the heat medium return header portion 43 and returned to the outlet side connection port 432 of the heat medium return header portion 43. Connect the upstream end of.

  Thus, when the hot water heating circulation corresponding to the opening of the corresponding thermal valve of the heating forward header 25 of the heating device 2 and the supply of the heat medium to the forward connection pipe 57 is started, the hot water is supplied through the forward pipe 57. The heating medium passes through the communication space 421 of the immediate hot water header 4, the outgoing pipes 91 to 93, the return pipes 97 to 99, the return pipes 94 to 96, and the communication space 431, and passes through the return connection pipe 58 to the heating device 2. It can be circulated and fed back. The circulating supply of the heat medium is stopped during the hot water supply operation in the hot water supply device 3, that is, hot water for hot water supply in each of the hot water supply passage 34, the communication space 411 in the hot water supply header 41, and the hot water supply pipes 81 to 83. Is carried out in a state where the water remains and stays, first, hot water in the communication space 411 of the hot water supply header portion 41 is transferred from the heat medium supplied to the communication space 421 of the heat medium header portion 42. Then, the hot water in each of the hot water supply pipes 81 to 83 is heated by receiving heat transfer from the heat medium supplied to the outgoing pipes 91 to 93, and the above heating (heat exchange heating) is performed. Even while the heat medium having a low temperature is returned through the return pipes 94 to 96 and the communication space 431 of the heat medium return header portion 43, some heat transfer is given to the hot water. Thereby, all hot water for hot water staying in the path from the hot water supply device 2 to the hot water taps 61 to 63 is heated while the hot water supply operation is stopped, and in the communication space 411. Due to natural convection of the heated hot water or the like, the warming area rises along the hot water outlet 34 and the hot water supply device 3 is also heated. The temperature of the heated hot water is detected by the hot water supply temperature sensor 35 interposed in the hot water outlet 34 of the hot water supply device 3.

  As the hot water operation control using the detected temperature from the hot water temperature sensor 35, the one shown in FIG. This hot water operation control is executed by the hot water control means set in advance in the controller 7 based on a set hot water supply temperature or the like that is set by the user to the remote controller 71 or set in advance. That is, when the hot water supply operation is stopped, the immediate hot water operation (instant hot water heating circulation) is started. First, the corresponding thermal valve is opened to heat the forward connection pipe 57 from the heating device 2 as a heat source for heating. Circulate the medium. Then, the detected temperature from the hot water supply temperature sensor 35 is monitored, and if the detected temperature is lower than the first determination temperature (first determination temperature = set hot water supply temperature−X), the above-described immediate hot water operation is continued (step). If the detected temperature is equal to or higher than the first determination temperature, the immediate hot water operation is stopped (YES in step S1, step S2). That is, the thermal valve of the heating header 25 is closed. Note that the above “X” ° C. is the hot water temperature sensor of the hot water outlet 34 where the hot water in the communication space 411 rises due to the heating by the heat transfer in the hot water supply header 41 and then the heated area is heated by natural convection. A temperature difference corresponding to the time lag may be set in consideration of the time lag required to expand to 35 positions.

  Further, the temperature detected by the hot water supply temperature sensor 35 is monitored, and if the detected temperature is equal to or higher than the second determination temperature (second determination temperature = set hot water supply temperature−XY), the above-described immediate hot water operation is stopped. On the other hand (NO in step S3), if the detected temperature is lower than the second determination temperature, the immediately closed hot water operation is resumed by opening the closed thermal valve (YES in step S3, step S4). ). And it returns to said step S1 and repeats the above step, and repeats and performs hot water heating circulation intermittently. Here, the setting of “X” ° C. is as described above. However, as “Y” ° C., when the ON / OFF of the hot water heating circulation is alternately repeated as described above, when switching from the ON state to the OFF state, The temperature drop and the temperature rise at the time of switching from the OFF state to the ON state change with a predetermined temperature gradient. Therefore, a temperature difference corresponding to the differential temperature (differential temperature) may be set. As described above, the hot water for hot water remaining from the hot water supply device 3 to each of the hot water taps 61 to 63 is maintained in a state of being heated to a predetermined temperature. The hot water at a temperature can be discharged, and it is possible to eliminate waiting for the user until the hot water comes out or draining wastewater without being used.

  Moreover, by using the hot water header 4 as described above, the heating device 2 for circulatingly supplying the heating medium to the forward pipes 91 to 93 and the return pipes 94 to 96 attached to the plurality of hot water supply pipes 81 to 83, The connection work is completed only by connecting the forward connection pipe 57 and the return connection pipe 58. This eliminates the necessity of adding the heating header 25 and the heating return header 26 on the side of the heating device 2, or eliminates the problem of hindering circulation supply of the heat medium to the original heating target. be able to. In addition, since the inside of the hot water header 4 is also heated by the heating medium, it can be heated up to the inside of the hot water supply device 2 such as the hot water outlet 34 that has not been heated in the past, and the next hot water supply. It becomes possible to avoid the occurrence of a cold water sandwich phenomenon at the start of use.

Second Embodiment
FIG. 6 shows an immediate hot water header 4a used in the immediate hot water system of the second embodiment of the present invention. In the second embodiment, the heating state in a certain temperature range can be maintained without executing the ON / OFF alternate operation control of the hot water heating circulation based on the hot water supply temperature sensor 35. . Therefore, the instant hot water header 4a is the same as the instant hot water header 4 of the first embodiment, but further includes automatic open / close valves 101, 102, and 103 that automatically open and close according to the temperature. It is. In addition, about the component same as 1st Embodiment, the same code | symbol as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted (the same also in each following embodiment).

  That is, automatic opening / closing valves 101, 102, and 103 as automatic opening / closing means are individually added to the outlet side connection ports 423, 424, and 425 of the heat transfer header part 42, and the outlet side connection port 413 of the hot water supply header part 41 is added. , 414, 415, the outlet side connection ports 423, 424, 425 are automatically opened and closed in accordance with the hot water temperature. The automatic opening / closing valves 101, 102, and 103 have the same configuration, and hot water in the outlet side connection ports 413, 414, and 415 of the hot water supply header portion 41 corresponding to the installed outlet side connection ports 423, 424, and 425, respectively. A heat-sensitive part that receives heat, a working medium (for example, thermowax) filled so as to expand and contract by heat from the heat-sensitive part, and the above-mentioned outlet connection by converting the expansion / contraction of the working medium into an operating force And a valve body for opening and closing the flow openings of the ports 423, 424, and 425.

  As the working medium, the valve body can be closed and converted when the temperature of the hot water receiving heat at the heat-sensitive portion becomes equal to or higher than the set hot water temperature at the set hot water temperature in the immediate hot water operation control described in the first embodiment. On the other hand, when the temperature of the hot water that receives heat in the heat sensitive part becomes lower than the set hot water supply temperature, it may be set so as to have a thermal characteristic that contracts so that the valve element can be opened and converted.

  In the case of the second embodiment described above, the outlet side connection ports 423, 424, and 425 of the heating medium outlet header portion 42 are automatically opened and closed in accordance with the hot water temperature in the hot water supply header portion 41, so that the hot water temperature is set. If the temperature falls below the hot water supply temperature, it is converted to open and heated by the start of circulation supply of the heat medium, and if it rises above the set hot water supply temperature, it is closed and the circulation of the heat medium is stopped. Therefore, the hot water remaining in the path from the hot water supply device 3 to each of the hot water taps 61 to 63 is added to a constant temperature without performing the on / off alternate operation control of the immediate hot water operation by the controller 7 as in the first embodiment. It can be kept warm.

  The target to be automatically opened / closed by the automatic opening / closing valves 101, 102, 103 may not be the outlet side connection ports 423, 424, 425 of the heat medium forward header 42, but may be other parts. An automatic opening / closing valve may be installed so as to automatically open / close the inlet side connection ports 433, 434, 435 or other parts of the heating medium return header portion 43 instead of the medium transport header portion 42.

<Third Embodiment>
FIG. 7 is an explanatory plan view of the instant water header 4b used in the third embodiment of the present invention. In the third embodiment, the hot water supply header section 41b is connected to the hot water supply apparatus 3 (see FIG. 1), and the heat medium forward header section 42b and the heat medium return header section 43b are connected to the heating apparatus 2 (see FIG. 1). The mutual positional relationship in can be easily changed and adjusted.

  That is, the hot water supply header portion 41b, the heat medium return header portion 42b, and the heat medium return header portion 43b are formed independently of each other and can be slid in the longitudinal direction H by an uneven fitting or a slider as described later. In a state, they are separable from each other. As shown in a side view of the hot water supply header 41b separated in FIG. 8, the one end 416b of the connection pipe 412b is inserted into the communication space 411 of the hot water supply header 41b so as to be relatively movable in the longitudinal direction H. The other end of the connecting pipe 412b is fixed and connected to the outlet 341 of the hot water outlet 34 of the heat source unit 1 by a nut 417b. Then, guide grooves 418b and 418b (see also FIG. 9) constituting the slider are formed on both side surfaces of the hot water header 41b. One end 416b of the connecting pipe 412b constitutes a position adjusting unit that can move relative to the longitudinal direction H (stretching direction).

  Further, as shown in a side view of the state in which the heat medium head header portion 42b is separated from the hot water supply header portion 41b in FIG. 10, one end 426b of the connecting pipe 422b communicating with the communication space 421 with respect to the heat medium head header portion 42b is provided. It is rotatably connected around an axis V extending in a direction orthogonal to the longitudinal direction H, and the other end of the connecting pipe 422b is fixed to and communicated with the heating header 25 of the heat source unit 1 by a nut 427b. It has become. One end 426b of the connecting pipe 422b constitutes a rotation adjusting unit. A guide rail 428b (see also FIG. 9) constituting the slider is formed in the longitudinal direction on the surface opposite to the hot water supply header 41b. The heat medium return header portion 43b is also configured in the same manner as the heat medium forward header portion 42b, and one end 436b of the connection pipe 432b communicating with the communication space 431 is rotatably connected around an axis V extending in a direction orthogonal to the longitudinal direction H. The other end of the connecting pipe 432b is fixedly connected to the heating return header 26 of the heat source unit 1 by a nut 437b. A guide rail 438b (see also FIG. 9) constituting the slider is formed in the longitudinal direction on the surface opposite to the hot water supply header 41b.

  In the case of the third embodiment described above, the arrangement of the heating device 2 and the hot water supply device 3 of the heat source device 1, particularly the outlet 341 of the hot water outlet 34 of the hot water supply device 3, the heating forward header 25 and the heating return header 26 of the heating device 2, Whatever the relative positional relationship is, the instant hot water header 4b can be connected and connected. That is, the connecting pipe 412b of the hot water supply header 41b is expanded or contracted according to the positional relationship, or one or both of the connecting pipe 422b of the heating medium return header 42b or the connecting pipe 432b of the heating medium return header 43b is rotated around the axis V. And the guide groove 418b and the guide rail 428b, or the guide groove 418b and the guide rail 438b are slid relative to each other to adjust the position in the longitudinal direction H. The position can be adjusted to match the position.

  In addition, as a connection connection with the heating head header 25, the heating return header 26, or the outlet 341 of the hot water outlet 34, as described above, it is clipped without using the nuts 417b, 427b, 437b, or the hot water supply header 41b is connected. The pipe 412b is connected to be rotatable about the axis V, while the connecting pipes 427b and 437b of the heating medium return header part 42b and the heating medium return header part 43b are connected so as to be relatively movable in the longitudinal direction H. Also good. Further, the assembly that can be relatively moved by the slide may be applied only to at least one of the heat medium forward header part 42b and the heat medium return header part 43b.

  Further, in the present embodiment and other embodiments, as the hot water supply device 3 and the heating device 2, those configured independently of each other may be used. By using the instant hot water header 4b of the embodiment, various connection / connection operations can be easily and reliably performed.

<Fourth embodiment>
FIG. 11 shows the hot water supply pipes 81 to 83, the forward pipes 91 to 93 and the return pipes 94 to 96 with the immediate hot water header 4c according to the fourth embodiment of the present invention, the forward connection pipe 57 and the return connection pipe 58. Connection procedure is shown. In the fourth embodiment, a T-shaped joint 12 and two U-shaped joints 13 and 13 are used for such connection. In FIG. 11, the direction orthogonal to the paper surface is the longitudinal direction of the instant hot water header 4c, the horizontal direction in FIG. 11 is the first orthogonal direction orthogonal to the longitudinal direction, and the vertical direction in FIG. 11 is the longitudinal direction and the first orthogonal direction. Are second orthogonal directions orthogonal to each other. For example, when the longitudinal direction is the vertical direction as in FIG. 1, the first orthogonal direction is the left-right direction, and the second orthogonal direction is the front-rear direction.

  The immediate hot water header 4c is integrally connected to the hot water supply header portion 41c and the heating medium return header portion 42c and the heating medium return header portion 43c at positions opposite to the outlet connection ports 413 to 415 in the first orthogonal direction. It is a thing. And the inlet side connection port 422 of the said heat-medium going-out header part 42c and the outlet side connection port 432 of the heating-medium return header part 43c are the outlet side connection ports 413-415 of the said hot water supply header part 41c with respect to a 1st orthogonal direction. Projected to the opposite side, the outlet side connection ports 423 to 425 of the heating medium outlet header portion 42c and the inlet side connection ports 433 to 435 of the heating medium return header portion 43c respectively protrude to the opposite sides to the second orthogonal direction. Has been.

  Further, the T-shaped joint 12 includes a pair of communication passages, and the connection ports 121 and 123 on one end side of both communication passages are respectively opened on the side opposite to the second orthogonal direction, and the connection port on the other end side. 122 and 124 are formed so as to be opened in the first orthogonal direction, respectively. Further, the U-shaped joint 13 is formed such that both the connection ports 131 and 132 at both ends of the communication path open to the same side with respect to the second orthogonal direction.

  Next, the connection / connection procedure will be described. As shown in FIG. 11 from the top to the bottom, the state of each procedure is shown as a first procedure. First, as the first procedure, the upstream end of the forward piping 91-93 and the downstream of the return piping 94-96 The connection ports 122 and 124 of the T-shaped joint 12 are coupled to the ends. As the second procedure, the outlet side connection ports 413 to 415 of the hot water supply header 41c of the hot water header 4c are connected to the hot water supply pipes 81 to 83 in this state. As a 3rd procedure, between the outlet side connection ports 423-425 of the instant hot water header 4c and the connection port 121 of the T-shaped joint, the one U-shaped joint 13 is connected and connected, and the inlet side connection ports 433-435 are connected. The other U-shaped joint 13 is connected to the connection port 123 of the T-shaped joint. Then, as a fourth procedure, the outgoing connection pipe 57 is connected to the input side connection port 422 and the return connection pipe 58 is connected to the output side connection port 432.

  Even in the case of the instant hot water header 4C of the fourth embodiment, the above-described T-shaped joint 12 and the U-shaped joint 13 can be reliably connected to each other.

It is a schematic diagram which shows embodiment of this invention. It is a perspective view of the instant water header of FIG. 3A is a cross-sectional explanatory view of the instant hot water header of FIG. 2, and FIG. 3B is a cross-sectional explanatory view taken along line BB of FIG. 3A. It is explanatory drawing which shows the instant hot water header and hot water supply piping seen from the AA arrow of FIG. 2 in a decomposition | disassembly state. It is a control flowchart of a hot water operation. It is a cross-sectional explanatory drawing of the instant hot water header used by 2nd Embodiment. It is a plane explanatory view of the instant water header used in a 3rd embodiment. It is a partially cutaway side view of the hot water supply header part in a state separated from the immediate hot water header of FIG. FIG. 8 is an explanatory cross-sectional view of the exploded state taken along the line CC of FIG. FIG. 8 is a partially cutaway side view of the heat transfer head header portion in a state separated from the immediate hot water header of FIG. 7. It is explanatory drawing which shows the assembly | attachment procedure of the instant hot water header in 4th Embodiment. It is a schematic diagram which shows the example of the conventional instant hot water system. It is a schematic diagram which shows the example of the other conventional instant hot water system different from FIG.

Explanation of symbols

2 Heating medium circulation type heating device 3 Hot water supply device 4, 4a, 4b, 4c Instant hot water header 7 Controller (immediate hot water operation control means)
35 Hot-water supply temperature sensors 41, 41b, 41c Hot-water supply headers 42, 42b, 42c Heat-medium return headers 43, 43b, 43c Heat-medium return headers 61-63 )
94-96 Return piping (circulation piping)
101, 102, 103 Automatic open / close valve (automatic open / close means)
411 Communication space 412 of hot water supply header portion Inlet side connection ports 413 to 415 of hot water supply header portion Outlet connection port 416b of hot water header portion One end (position adjusting portion) of connecting pipe
421 Communication space 422 of the heat medium forward header section 422 Inlet side connection ports 423 to 425 of the heat medium forward header section 426b Outlet connection port 426b of the heat medium forward header section One end of the connecting pipe (rotation adjustment section)
431 Communication space 432 of the heat medium return header portion Entry side connection ports 433 to 435 of the heat medium return header portion Outlet connection ports of the heat medium return header portion

Claims (6)

It is configured to supply hot water to a plurality of hot water supply destinations from the outlet of the hot water supply passage through individual hot water supply pipes. On the other hand, in the hot water supply stop state, it receives heat supply from the heat medium circulation heating device and transfers heat. An immediate hot water system in which a circulation pipe is piped along with each of the hot water supply pipes so as to heat the hot water in the hot water supply pipe.
An immediate hot water header is interposed between the hot water supply device and the hot water supply pipe,
The instant hot water header
A hot water supply header section in which the inlet side connection port is connected to the outlet of the hot water outlet and the hot water supply pipes are individually connected to the plurality of outlet side connection ports;
Heat medium forward header portion in which the inlet side connection port is connected to the heating device side so that the heating medium is supplied from the heating device, and the plurality of outlet side connection ports are individually connected to the upstream end of the circulation pipe. When,
A plurality of inlet side connection ports are individually connected to the downstream end of the circulation pipe so that the heating medium returned from the circulation pipe is joined and the heating medium having the outlet side connection port joined is returned to the heating device. A heating medium return header connected to the heating device side;
The heating medium return header part and the heating medium return header part are integrated with the hot water supply header part so that the hot water in the hot water supply header part receives heat transfer from the heating medium in the heating medium return header part and the heating medium return header part. Assembled and configured,
Instant hot water system characterized by that. The instant hot water system according to claim 1,
The hot water operation control means includes a hot water operation control means, and the hot water operation control means is configured to provide heat from the heating device to the hot water header based on a comparison between a detected temperature from a hot water supply temperature sensor disposed in the hot water outlet and a determination temperature. An instant hot water system configured to control the circulation and supply of the medium alternately on and off. The instant hot water system according to claim 1,
An automatic opening / closing means for automatically switching between execution and stop of circulation of the heating medium via the immediate hot water header is provided, and the automatic opening / closing means automatically switches depending on whether the hot water temperature in the hot water header is high or low. Constructed, instant hot water system. The instant hot water system according to claim 1,
The instant hot water header is an instant hot water system in which at least one of the heating medium return header part and the heating medium return header part is assembled so as to be movable relative to the hot water supply header part via a slider. The instant hot water system according to claim 1,
The instant hot water header is provided with an instant hot water system including a rotating part capable of swinging at a connection site with at least one of the hot water supply device and the heating device. The instant hot water system according to claim 1,
The immediate hot water system includes an immediate hot water system including a position adjusting unit that is movable relative to an expansion / contraction direction at a connection portion with at least one of the hot water supply device and the heating device.

Images